DTI HOLDINGS INC
S-4/A, 1998-07-13
TELEPHONE COMMUNICATIONS (NO RADIOTELEPHONE)
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<PAGE>   1
 
   
     AS FILED WITH THE SECURITIES AND EXCHANGE COMMISSION ON JULY 13, 1998
    
   
                                                      REGISTRATION NO. 333-50049
    
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
 
                       SECURITIES AND EXCHANGE COMMISSION
 
                             WASHINGTON, D.C. 20549
                            ------------------------
 
   
                                AMENDMENT NO. 1
    
   
                                       TO
    
                                    FORM S-4
 
                             REGISTRATION STATEMENT
                                     UNDER
                           THE SECURITIES ACT OF 1933
                            ------------------------
 
                               DTI HOLDINGS, INC.
             (Exact name of registrant as specified in its charter)
 
                                    MISSOURI
                        (State or Other Jurisdiction of
                         Incorporation or Organization)
                                      4813
                          (Primary Standard Industrial
                          Classification Code Number)
                                   43-1674259
                                (I.R.S. Employer
                             Identification Number)
 
                            ------------------------
 
                               11111 DORSETT ROAD
                           ST. LOUIS, MISSOURI 63043
                                 (314) 253-6600
              (Address, Including Zip Code, and Telephone Number,
       Including Area Code, of Registrant's Principal Executive Offices)
 
                            ------------------------
 
                              RICHARD D. WEINSTEIN
                PRESIDENT, CHIEF EXECUTIVE OFFICER AND SECRETARY
                               11111 DORSETT ROAD
                           ST. LOUIS, MISSOURI 63043
                                 (314) 253-6600
           (Name, Address, Including Zip Code, and Telephone Number,
                   Including Area Code, of Agent for Service)
 
                            ------------------------
 
                                   Copies to:
                              J. MARK KLAMER, ESQ.
                                 BRYAN CAVE LLP
                         211 NORTH BROADWAY, SUITE 3600
                           ST. LOUIS, MISSOURI 63102
                                 (314) 259-2000
 
                            ------------------------
 
     APPROXIMATE DATE OF COMMENCEMENT OF PROPOSED SALE TO THE PUBLIC: As soon as
practicable after this Registration Statement becomes effective.
 
     If the securities being registered on this form are being offered in
connection with the formation of a holding company and there is compliance with
General Instruction G, check the following box.  [ ]
 
   
                            ------------------------
    
 
     THE REGISTRANT HEREBY AMENDS THIS REGISTRATION STATEMENT ON SUCH DATE OR
DATES AS MAY BE NECESSARY TO DELAY ITS EFFECTIVE DATE UNTIL THE REGISTRANT SHALL
FILE A FURTHER AMENDMENT WHICH SPECIFICALLY STATES THAT THIS REGISTRATION
STATEMENT SHALL THEREAFTER BECOME EFFECTIVE IN ACCORDANCE WITH SECTION 8(A) OF
THE SECURITIES ACT OF 1933 OR UNTIL THE REGISTRATION STATEMENT SHALL BECOME
EFFECTIVE ON SUCH DATE AS THE COMMISSION, ACTING PURSUANT TO SAID SECTION 8(A),
MAY DETERMINE.
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
<PAGE>   2
 
INFORMATION CONTAINED HEREIN IS SUBJECT TO COMPLETION OR AMENDMENT. A
REGISTRATION STATEMENT RELATING TO THESE SECURITIES HAS BEEN FILED WITH THE
SECURITIES AND EXCHANGE COMMISSION. THESE SECURITIES MAY NOT BE SOLD NOR MAY
OFFERS TO BUY BE ACCEPTED PRIOR TO THE TIME THE REGISTRATION STATEMENT BECOMES
EFFECTIVE. THIS PROSPECTUS SHALL NOT CONSTITUTE AN OFFER TO SELL OR THE
SOLICITATION OF AN OFFER TO BUY NOR SHALL THERE BE ANY SALE OF THESE SECURITIES
IN ANY STATE IN WHICH SUCH OFFER, SOLICITATION OR SALE WOULD BE UNLAWFUL PRIOR
TO REGISTRATION OR QUALIFICATION UNDER THE SECURITIES LAWS OF ANY SUCH STATE.
 
   
                   SUBJECT TO COMPLETION, DATED JULY 13, 1998
    
 
PROSPECTUS                                                          CONFIDENTIAL
 
                           DTI DIGITAL TELEPORT LOGO
 
                               OFFER TO EXCHANGE
                12 1/2% SERIES B SENIOR DISCOUNT NOTES DUE 2008
           FOR ALL OUTSTANDING 12 1/2% SENIOR DISCOUNT NOTES DUE 2008
                                       OF
 
                               DTI HOLDINGS, INC.
        THE EXCHANGE OFFER WILL EXPIRE AT 5:00 P.M., NEW YORK CITY TIME
                   ON                  , 1998 UNLESS EXTENDED
                            ------------------------
 
    DTI Holdings, Inc. ("DTI" or the "Company") is hereby offering (the
"Exchange Offer"), upon the terms and subject to the conditions set forth in
this Prospectus and the accompanying Letter of Transmittal (the "Letter of
Transmittal"), to exchange $1,000 principal amount at maturity of its 12 1/2%
Series B Senior Discount Notes due 2008 (the "Exchange Notes"), which exchange
has been registered under the Securities Act of 1933, as amended (the
"Securities Act"), pursuant to a registration statement of which this Prospectus
is a part (the "Registration Statement"), for each $1,000 principal amount at
maturity of its outstanding 12 1/2% Senior Discount Notes due 2008 (the "Private
Notes"), of which $506,000,000 in aggregate principal amount at maturity was
issued on February 23, 1998 and is outstanding as of the date hereof. The form
and terms of the Exchange Notes are identical in all material respects to those
of the Private Notes, except for certain transfer restrictions and registration
rights relating to the Private Notes and except for certain interest provisions
related to such registration rights. The Exchange Notes will evidence the same
indebtedness as the Private Notes (which they replace) and will be entitled to
the benefits of an Indenture dated as of February 23, 1998 governing the Private
Notes and the Exchange Notes (the "Indenture"). The Private Notes and the
Exchange Notes are sometimes referred to herein collectively as the "Notes." See
"The Exchange Offer" and "Description of the Notes."
 
   
    The Exchange Notes will be redeemable at the option of the Company, in whole
or in part, at any time on or after March 1, 2003 at the redemption prices set
forth herein, together with accrued interest, if any, to the date of redemption.
In addition, at any time or from time to time on or prior to March 1, 2001, the
Company may redeem up to 33 1/3% of the aggregate principal amount at maturity
of the originally issued Notes with the net proceeds of one or more Public
Equity Offerings (as defined herein) at a redemption price equal to 112.5% of
the Accreted Value (as defined herein) thereof; provided that immediately after
giving effect to such redemption, at least 66 2/3% of the aggregate principal
amount at maturity of the originally issued Notes remain outstanding. Upon the
occurrence of a Change of Control (as defined herein), each holder of Exchange
Notes may require the Company to purchase all or a portion of such holder's
Exchange Notes at a purchase price in cash equal to 101% of the Accreted Value
thereof, together with accrued interest, if any, to the date of purchase. See
"Description of the Notes -- Redemption" and "-- Certain Covenants." There can
be no assurance that the Company will have available, or will be able to acquire
from alternative sources of financing, funds sufficient to repurchase the
Exchange Notes in the event of a Change of Control. See "Risk Factors -- High
Leverage; Ability to Service Indebtedness; Restrictive Covenants."
    
 
   
    The Exchange Notes will be senior unsecured obligations of the Company,
ranking pari passu in right of payment with the Private Notes and all future
unsecured senior indebtedness of the Company and senior in right of payment to
all future obligations of the Company expressly subordinated in right of payment
to the Exchange Notes. As of March 31, 1998, the Company had approximately
$268.9 million of indebtedness outstanding, all of which was evidenced by the
Private Notes. Because the Company is a holding company that conducts its
business through its wholly owned subsidiary, Digital Teleport, Inc., all
existing and future indebtedness and other liabilities and commitments of the
Company's subsidiary, including trade payables, will be effectively senior to
the Notes. The Company's subsidiary will not be a guarantor of the Exchange
Notes. As of March 31, 1998 Digital Teleport, Inc. had aggregate liabilities of
$21.1 million, including $14.4 million of deferred revenues. See "Description of
the Notes."
    
 
    The Company will accept for exchange any and all validly tendered Private
Notes not withdrawn prior to 5:00 p.m., New York City time, on         ,1998,
unless the Exchange Offer is extended by the Company in its sole discretion (the
"Expiration Date"). Tenders of Private Notes may be withdrawn at any time prior
to the Expiration Date. Private Notes may be tendered only in integral multiples
of $1,000. The Exchange Offer is subject to certain customary conditions. See
"The Exchange Offer."
 
   
    SEE "RISK FACTORS" BEGINNING ON PAGE 17 FOR A DISCUSSION OF CERTAIN FACTORS
THAT SHOULD BE CONSIDERED BY PROSPECTIVE INVESTORS IN CONNECTION WITH THE
EXCHANGE OFFER AND AN INVESTMENT IN THE EXCHANGE NOTES.
    
                            ------------------------
 
  THESE SECURITIES HAVE NOT BEEN APPROVED OR DISAPPROVED BY THE SECURITIES AND
 EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION NOR HAS THE SECURITIES
   AND EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION PASSED UPON THE
ACCURACY OR ADEQUACY OF THIS PROSPECTUS. ANY REPRESENTATION TO THE CONTRARY IS A
                               CRIMINAL OFFENSE.
 
                            ------------------------
 
                 The date of this Prospectus is        , 1998.
<PAGE>   3
 
   
                     [MAP OF U.S. WITH PLANNED DTI NETWORK]
    
 
                                        2
<PAGE>   4
 
                              NOTICE TO INVESTORS
 
   
     The Exchange Notes are being offered hereunder in order to satisfy certain
obligations of the Company contained in the Notes Registration Rights Agreement
(as defined herein). Based on interpretations by the staff of the Securities and
Exchange Commission (the "Commission") set forth in no-action letters issued to
third parties, the Company believes that the Exchange Notes issued pursuant to
the Exchange Offer in exchange for Private Notes may be offered for resale,
resold and otherwise transferred by any Holder thereof (other than any such
Holder which is an "affiliate" of the Company within the meaning of Rule 405
under the Securities Act), without compliance with the registration and
prospectus delivery provisions of the Securities Act, provided that such
Exchange Notes are acquired in the ordinary course of such Holder's business and
such Holder has no arrangement with any person to participate in the
distribution of such Exchange Notes. Notwithstanding the foregoing, each
broker-dealer that receives Exchange Notes for its own account pursuant to the
Exchange Offer must acknowledge that (i) Private Notes tendered by it in the
Exchange Offer were acquired in the ordinary course of its business as a result
of market-making or other trading activities and (ii) it will deliver a
prospectus in connection with any resale of Exchange Notes received in the
Exchange Offer. The Letter of Transmittal states that by so acknowledging and by
delivering a prospectus, a broker-dealer will not be deemed to admit that it is
an "underwriter" within the meaning of the Securities Act. This Prospectus, as
it may be amended or supplemented from time to time, may be used by a
broker-dealer in connection with any resale of the Exchange Notes received in
exchange for Private Notes where such Private Notes were acquired by such
broker-dealer as a result of market-making or other trading activities (other
than Private Notes acquired directly from the Company). The Company has agreed
that, for a period of 120 days after the Expiration Date, it will make this
Prospectus available to any broker-dealer for use in connection with any such
resale. See "Plan of Distribution." Any holder who tenders in the Exchange Offer
for the purpose of participating in a distribution of the Exchange Notes cannot
rely on the no-action letters discussed above or similar letters and must comply
with the registration and prospectus delivery requirements of the Securities Act
in connection with a secondary resale transaction.
    
 
   
     Tenders of Private Notes pursuant to the Exchange Offer may be withdrawn at
any time prior to the Expiration Date. The Exchange Offer is subject to certain
customary conditions. In the event the Company terminates the Exchange Offer and
does not accept for exchange any Private Notes, the Company will promptly return
the Private Notes to the Holders thereof. The Company will give oral or written
notice of any extension, amendment, non-acceptance or termination of the
Exchange Offer to the Holders of the Private Notes as promptly as practicable,
such notice in the case of any extension to be issued by means of a press
release or other public announcement no later than 9:00 a.m., New York City
time, on the next business day after the previously scheduled Expiration Date.
The Company can, in its sole discretion, extend the Exchange Offer indefinitely,
subject to the Company's obligation to pay Special Interest (as defined herein)
if the Exchange Offer is not consummated by September 21, 1998 and, under
certain circumstances, file a shelf registration statement with respect to the
Private Notes. The Company has agreed to pay the expenses of the Exchange Offer.
The Company will not receive any proceeds from the Exchange Offer. See "Use of
Proceeds."
    
 
   
     Prior to the date of this Prospectus, there has been no public market for
the Exchange Notes. The Company does not currently intend to list the Exchange
Notes on any securities exchange or to seek approval for quotation through any
automated quotation system. Accordingly, there can be no assurance as to the
development or liquidity of any public market that may develop for the Exchange
Notes, the ability of holders to sell the Exchange Notes, or the price at which
holders would be able to sell the Exchange Notes. The National Association of
Securities Dealers, Inc. ("NASD") has designated the Private Notes as securities
eligible for trading in the Private Offerings. Resales and Trading through
Automatic Linkages ("PORTAL") market of the NASD, and the Company has been
advised that Merrill Lynch, Pierce, Fenner & Smith Incorporated and TD
Securities (USA) Inc. (together, the "Initial Purchasers") have heretofore acted
as market makers for the Private Notes. The Company has been advised by each of
the aforesaid market makers that it currently intends to make a market in the
Exchange Notes. Future trading prices of the Exchange Notes will depend on many
factors, including among other things, prevailing interest rates, the Company's
operating results and the market for similar securities. Historically, the
market for securities similar to the
    
 
                                        3
<PAGE>   5
 
Exchange Notes, including non-investment grade debt, has been subject to
disruptions that have caused substantial volatility in the prices of such
securities. There can be no assurance that any market for the Exchange Notes, if
such market develops, will not be subject to similar disruptions. See "Risk
Factors -- Absence of a Public Market for the Notes."
 
     The Private Notes were sold by the Company on February 23, 1998 (the
"Original Issue Date") in transactions which were not registered under the
Securities Act, in reliance upon the exemption provided by Section 4(2) of the
Securities Act.
 
                             AVAILABLE INFORMATION
 
   
     The Company has filed with the Commission a Registration Statement on Form
S-4 (the "Exchange Offer Registration Statement") under the Securities Act with
respect to the Exchange Notes covered by this Prospectus. This Prospectus does
not contain all of the information set forth in the Exchange Offer Registration
Statement and the exhibits and schedules thereto, certain portions of which have
been omitted pursuant to the rules and regulations of the Commission. Statements
made in this Prospectus as to the contents of any contract, agreement or other
document are not necessarily complete. With respect to each such contract,
agreement or other document filed or incorporated by reference as an exhibit to
the Exchange Offer Registration Statement, reference is made to such exhibit for
a more complete description of the matter involved, and each such statement is
qualified in its entirety by such reference.
    
 
   
     The Company will be subject to the periodic reporting and other
informational requirements of the Securities Exchange Act of 1934, as amended
(the "Exchange Act"), and in accordance therewith will file reports and other
information with the Commission. The Exchange Offer Registration Statement and
reports and other information filed by the Company may be inspected and copied
at the public reference facilities maintained by the Commission at Room 1024,
Judiciary Plaza, 450 Fifth Street, N.W., Washington, D.C. 20549 and will also be
available for inspection and copying at the regional offices of the Commission
located at Suite 1400, 500 West Madison Street, Chicago, Illinois 60661 and 7
World Trade Center, 13th Floor, New York, New York 10048. Copies of such
material can be obtained by mail from the Public Reference Section of the
Commission at Judiciary Plaza, 450 Fifth Street, N.W., Washington, D.C. 20549,
at prescribed rates. The Commission maintains a website (http://www.sec.gov)
that contains reports, proxy and information statements and other information
regarding registrants that file electronically with the Commission. Under the
terms of the Indenture pursuant to which the Private Notes were, and the
Exchange Notes will be, issued, the Company will be required to file with the
Commission, and to furnish holders of the Notes with, the information, documents
and other reports specified in Sections 13 and 15(d) of the Exchange Act,
including reports on Forms 10-K, 10-Q and 8-K. On May 15, 1998, the Company
filed with the Commission its Quarterly Report on Form 10-Q for the quarter
ended March 31, 1998, in accordance with the Indenture.
    
 
                           FORWARD-LOOKING STATEMENTS
 
     THIS PROSPECTUS CONTAINS FORWARD-LOOKING STATEMENTS THAT INCLUDE, AMONG
OTHERS, STATEMENTS CONCERNING THE COMPANY'S PLANS TO COMPLETE THE DTI NETWORK,
EXPECTATIONS AS TO FUNDING ITS CAPITAL REQUIREMENTS, ANTICIPATED EXPANSION OF
CARRIER'S CARRIER AND END-USER SERVICES, AND OTHER STATEMENTS OF EXPECTATIONS,
BELIEFS, FUTURE PLANS AND STRATEGIES, ANTICIPATED DEVELOPMENTS AND OTHER MATTERS
THAT ARE NOT HISTORICAL FACTS. MANAGEMENT CAUTIONS THE READER THAT THESE
FORWARD-LOOKING STATEMENTS ARE SUBJECT TO RISKS AND UNCERTAINTIES THAT COULD
CAUSE ACTUAL EVENTS OR RESULTS TO DIFFER MATERIALLY FROM THOSE EXPRESSED OR
IMPLIED BY THE STATEMENTS. THE MOST IMPORTANT FACTORS THAT COULD PREVENT THE
COMPANY FROM ACHIEVING ITS STATED GOALS INCLUDE, BUT ARE NOT LIMITED TO, FAILURE
BY THE COMPANY TO (I) OBTAIN SUBSTANTIAL AMOUNTS OF ADDITIONAL CAPITAL AND
FINANCING AT REASONABLE COSTS AND ON SATISFACTORY TERMS AND CONDITIONS, (II)
MANAGE EFFECTIVELY AND COST EFFICIENTLY
 
                                        4
<PAGE>   6
 
   
THE CONSTRUCTION OF THE DTI NETWORK ROUTE SEGMENTS, (III) ACCESS MARKETS
AND ENTER INTO ADDITIONAL INDEFEASIBLE RIGHTS TO USE AND WHOLESALE NETWORK
CAPACITY AGREEMENTS AND OTHERWISE EXPAND ITS TELECOMMUNICATIONS CUSTOMER BASE ON
THE DTI NETWORK, (IV) OBTAIN ADDITIONAL FRANCHISES, PERMITS AND RIGHTS-OF-WAY
AND MAINTAIN ALL NECESSARY FRANCHISES, PERMITS AND RIGHTS-OF-WAY AND (V)
MAINTAIN EXISTING STRATEGIC ALLIANCES AND CUSTOMER AND SUPPLIER RELATIONSHIPS.
    
 
                                        5
<PAGE>   7
 
                                    SUMMARY
 
   
     The following summary is qualified in its entirety by, and should be read
in conjunction with, the more detailed information, the financial statements and
the notes thereto and other financial data contained elsewhere in this
Prospectus. Prospective investors should carefully consider the factors set
forth herein under the caption "Risk Factors" and are urged to read this
Prospectus in its entirety. References in this Prospectus to the "Company" and
"DTI" refer to DTI Holdings, Inc. and its subsidiary, Digital Teleport, Inc.
("Digital Teleport"), except where the context otherwise requires. The Company's
fiscal year ends on June 30 of each year. Unless otherwise indicated, or the
context otherwise suggests, (i) references in this Prospectus to the design or
physical characteristics of the DTI network refer to the design and physical
characteristics of the DTI network as currently completed and the presently
anticipated design and physical characteristics of the remaining network sought
to be built by the Company in the Midwest region, (ii) references herein to
years and quarters shall refer to calendar years and calendar quarters, rather
than fiscal years and fiscal quarters, and (iii) the summary and selected
financial data and the other financial data contained herein give effect to the
100-for-1 stock split, in the form of a stock dividend, of the common stock, par
value $0.01 per share ("Common Stock") of the Company effected on October 21,
1997, the reorganization of the Company in which Digital Teleport became an
operating subsidiary of the newly created DTI Holdings, Inc., effected on
December 23, 1997, as more fully described elsewhere in the Prospectus, and the
1,000-for-1 stock split, in the form of a stock dividend, of the Common Stock
effected on February 17, 1998. Certain terms used in this Prospectus have the
respective meanings ascribed to them in the Glossary included as Annex A hereto,
and certain capitalized terms used herein have the respective meanings ascribed
to them in "Description of the Notes -- Certain Definitions" and in "Description
of the Warrants -- Certain Definitions."
    
 
                                  THE COMPANY
 
   
     DTI is a facilities-based provider of long-haul and local
telecommunications services primarily to interexchange carriers ("IXCs") and
other communications entities on a wholesale basis ("carrier's carrier
services"), as well as directly to business and governmental end users
("end-user services"). The Company is building out the DTI network through the
creation of regional rings by interconnecting long haul routes among primary,
secondary and tertiary cities in the Midwest region because it believes that
substantial unmet demand for additional IXC capacity exists in secondary and
tertiary markets located between the primary markets. The Company has plans to
expand its fiber optic telecommunications network outward from the Midwest
region to other similarly underserved markets in the United States. The Company
will strive to position itself as a low-cost provider of telecommunications
services, and believes it will be able to offer regional ring transport to
carrier customers on a more economical basis than is currently available to such
customers, particularly among secondary and tertiary cities.
    
 
   
     DTI initially will focus on carrier's carrier services because it believes
that (i) the scope and flexibility of its ringed network design will be
attractive to carrier customers, (ii) revenues from carrier's carrier services
can be achieved more rapidly than from end-user services, and (iii) net margins
from the Company's carrier's carrier services are higher than the Company could
typically achieve from the Company's end-user services. DTI currently provides
carrier's carrier services under contracts with AT&T, Sprint, MCI and IXC
Carrier, and long-haul and local private line services to targeted business and
governmental end-user customers ("end-user customers") in Missouri.
    
 
   
     DTI has completed construction of approximately 1,800 route miles of a
planned 2,000 route mile fiber optic network in the state of Missouri, including
an aggregate of approximately 500 local route miles in St. Louis, Kansas City
and four other population centers in Missouri with populations of over 70,000
people. DTI currently provides services over 750 route miles of its network. The
Company is expanding its fiber optic network (the "DTI network") to cover a
14-state region in the Midwest (the "Midwest region") which is expected to
consist of approximately 7,700 route miles of fiber optic cable and Northern
Telecom Inc. ("Nortel") DMS-500 switches. DTI is also pursuing the expansion of
the DTI network to the east and west coasts of the United States, as well as
additional network in the Midwest region to facilitate such national
    
 
                                        6
<PAGE>   8
 
   
expansion. (See the DTI network map located on the inside front cover page of
this Prospectus). The Company's preliminary plans provide for a total national
network of approximately 15,000 route miles and 20 Nortel DMS-500 switches. The
Company expects to construct approximately half of such network and to obtain
indefeasible rights to use fiber optic facilities of other carriers for the
other half. As a part of this national expansion of the DTI network, the Company
has recently entered into a preliminary agreement for a long term indefeasible
right to use fiber optic strands and related facilities along a route from
Washington, D.C. to Texas.
    
 
   
     DTI intends to interconnect its long haul routes to form regional rings
around the primary, secondary and tertiary cities located along such routes. The
Company also intends to interconnect the DTI network to major IXC POPs and ILEC
access tandems along its regional rings. The Company will offer its carrier
customers with transmission capacity through individual wavelength-specific
circuits of OC-48 capacity, or optical windows, on dense wavelength division
multiplexing ("DWDM") equipment deployed throughout the regional rings. DTI also
intends to provide local switched service capacity to its carrier customers on a
wholesale basis as it deploys its switches. The Company believes these services
will provide each of its carrier customers with a high quality, ring redundant
means to efficiently deliver its calls to a significant number of end-users
along these rings and aggregate, for further long haul transport, the outgoing
calls of a carrier's customers along such rings to a single regional point of
interconnection between the carrier's network and DTI's network. The Company
will also offer use of its optical windows to its carrier customers as a means
to transport point-to-point dedicated data and voice circuit communications
along its network. The Company believes that its regional rings will offer its
carrier customers greater reliability and accountability and less administrative
burden than their typical current transport methods. Through strategic routing
and switch placement, DTI believes it can also leverage its regional rings and
long haul capacity to permit the Company to cost-effectively construct local
loops and pursue other revenue-generating opportunities.
    
 
     The Company believes deregulation in the telecommunications industry has
created a significant market opportunity by allowing carriers such as DTI to
compete in both local and long haul markets. The FCC has reported that, in 1996,
toll service revenues of long distance carriers in the U.S. were approximately
$82 billion and revenues of reporting local exchange carriers in the U.S. were
approximately $101 billion. Based on FCC data, toll service revenues of long
distance carriers and revenues of reporting local exchange carriers grew at a
compound annual rate of approximately 8.5% and 3.3%, respectively, during the
period 1991 through 1996. The Company believes that these growth trends
generally will continue and that non-facilities-based companies will need to
either invest in network facilities or lease high bandwidth network capacity to
remain competitive. The Company believes additional network transmission
capacity and faster response times will be required to accommodate the use of
the Internet and other high-bandwidth multimedia and data applications.
 
   
     The DTI network's self-healing, SONET ring architecture provides virtually
instantaneous rerouting in the event of a cut in a fiber ring. DTI expects that
more than 90% of the DTI network will be installed underground, providing
protection from weather and other environmental hazards affecting the
reliability of communication connections. The DTI network will have both
high-bandwidth capacity and flexibility as a result of (i) high speed
transmission electronics equipment from Fujitsu, (ii) high capacity DWDM
equipment, (iii) the selective installation on Company-built routes of between
48 and 288 strands of fiber optic cable, incorporating Corning glass, and (iv)
extra conduits along selected long haul routes that the Company constructs. (On
routes that the Company does not build, the Company expects to typically obtain
IRUs ranging from two to 12 optical fibers). The Company believes the use of
Fujitsu fiber optic terminal equipment will provide DTI's customers the ability
to monitor, in their own network control centers, the portions of the DTI
network that they utilize. The Fujitsu equipment should also permit DTI's
customers to utilize their own network control centers to add and remove
services on those portions of the DTI network they have a right to use. The use
of DWDM equipment will give the DTI network an open architecture, providing
compatibility with the broad range of transmission speeds and signal formats
used by the existing transmission systems of its carrier customers. The use of
DWDM equipment also will give the DTI network an open architecture, providing
compatibility with the broad range of transmission speeds and signal formats
used by the existing transmission systems of its carrier customers. The DWDM
equipment also will enable DTI to
    
 
                                        7
<PAGE>   9
 
   
offer its carrier customers high capacity, ring redundant, dedicated optical
windows of a particular wavelength through which its carrier customers can
deliver telecommunications services on a regional basis. The installation of
high-fiber-count cables and extra conduits on selected Company-built routes will
provide DTI with the ability to expand the capacity of its network and to sell
dark fibers to its customers along certain routes.
    
 
   
     The Company has installed its first Nortel DMS-500 switch in St. Louis. By
the end of 1998, the Company expects to have substantially completed
construction in Missouri. The Company is currently constructing fiber optic
facilities in Arkansas. In the next 12 to 18 months, the Company expects to have
commenced construction of fiber optic facilities on those routes along which it
will construct its facilities and to have reached agreement or commenced
negotiations for IRUs for the rest of the planned DTI network. The Company has
entered into a preliminary agreement for a long term IRU for fiber optic strands
and related facilities along a route from Washington, D.C. to Texas.
    
 
   
BUSINESS STRATEGY
    
 
   
     The Company's objective is to become a leading facilities-based provider of
communication services to other communications entities and end-user customers
in the Midwest region and selected other regions of the United States. To
achieve this objective, the Company intends to:
    
 
   
     LEVERAGE INTEGRATED LONG HAUL ROUTES, REGIONAL RINGS AND LOCAL NETWORK
DESIGN. The Company believes that the strategic design of the DTI network will
allow it to offer reliable, high-capacity, long haul and local switched services
on a region-by-region basis to carrier and end-user customers who seek a
competitive alternative to incumbent providers of such services. Through the
strategic routing of the DTI network near primary, secondary and tertiary
markets and major IXC POPs and ILEC access tandems, and the use, on selected
routes, of high-capacity DWDM equipment, the Company will provide its carrier
customers with dedicated, high quality, ring-redundant OC-48 capacity that will
allow such carriers to (i) efficiently deliver their calls to a significant
number of end users along the DTI network's regional rings and (ii) aggregate
the outgoing calls of their customers along such rings to a single regional
point of interconnection between the DTI network and the carriers' networks. The
Company believes that the integrated design of the DTI network will provide
carrier customers with greater reliability and accountability and less
administrative burden than their current transport methods.
    
 
   
     STRATEGICALLY LOCATE AND EXPAND ITS NETWORK THROUGH REGIONAL RINGS. The
Company is building out the DTI network through the creation of regional rings
that interconnect primary, secondary and tertiary cities in the Midwest region
because it believes that substantial unmet demand for additional IXC capacity
exists in secondary and tertiary markets located between the primary markets.
The Company plans to expand its fiber optic telecommunications network outward
from the Midwest region to offer services to other underserved markets in the
United States through the initial construction or acquisition of long-haul,
point-to-point routes that will then be interconnected to form regional rings.
The Company believes that its plan to build out the DTI network through a
combination of constructing fiber optic facilities and purchasing or exchanging
IRUs for such facilities will allow it more quickly to (i) offer reliable
connectivity on a regional basis and (ii) offer high quality services cost
effectively to markets where the Company believes it is less likely to face
significant competition from ILECs and competitive local exchange carriers
("CLECs").
    
 
   
     POSITION ITSELF AS A LOW-COST PROVIDER OF TELECOMMUNICATIONS SERVICES. The
Company will strive to position itself as a low-cost provider of
telecommunications services by (i) taking advantage of the potential cost
efficiencies of the DTI network design and use of high-speed transmission and
DWDM equipment, (ii) continuing to deploy advanced fiber optic network
technology, which the Company believes lowers construction, operating and
maintenance costs, and (iii) realizing cost efficiencies through existing and
additional fiber optic facility long-term IRUs and swaps with other
telecommunications companies and rights-of-way agreements with governmental
authorities.
    
 
   
     PURSUE LOCAL SWITCHED SERVICES OPPORTUNITIES. DTI believes its network
design will allow it to cost-effectively pursue local switched services
opportunities by creating regional and local fiber optic rings along its
    
                                        8
<PAGE>   10
 
   
long-haul routes and by leveraging the technical capabilities and high-bandwidth
capacity of the DTI network. In addition to providing switched service capacity
on a wholesale basis to both facilities-based and non-facilities-based carriers,
the Company will have sufficient long-haul capacity to offer a wide range of
local switched services to targeted end-user customers in primary, secondary and
tertiary cities located near the Company's regional rings.
    
 
   
     LEVERAGE EXPERIENCED MANAGEMENT TEAM. The Company's management team
includes individuals with significant experience in the deployment and marketing
of telecommunications services. Prior to founding DTI in 1989, Mr. Richard D.
Weinstein, President and Chief Executive Officer of DTI, owned and managed
Digital Tele-resources, Inc., a firm which designed, engineered and installed
telecommunications systems for large telecommunications companies, including SBC
and other Fortune 500 companies. The other members of the Company's senior
management team have over 70 years of collective experience in the
telecommunications industry. See "Management."
    
 
FINANCING PLAN
 
   
     The Company estimates that total capital expenditures necessary to complete
the DTI network will be approximately $673.2 million. Of this amount, the
Company had already expended approximately $62.8 million as of March 31, 1998.
The Company anticipates total capital expenditures of approximately $16.6
million in the fourth quarter of fiscal 1998 and $410.1 million in fiscal 1999.
On February 23, 1998, the Company consummated a private placement (the "Private
Offering") in reliance upon the exemption from registration under Section 4(2)
of the Securities Act, pursuant to which the Company issued and sold 506,000
units (the "Units") consisting of $506.0 million aggregate principal amount at
maturity of Private Notes and warrants to purchase 3,926,560 shares of Common
Stock (the "Warrants"). The net proceeds to the Company of the Private Offering
were approximately $264.8 million. In addition, aggregate amounts of advance
payments expected to be paid to the Company over the next five years under
existing contracts for IRUs and wholesale network capacity total approximately
$21.4 million as of March 31, 1998. Further financing sources may include: (i)
advance payments under additional IRUs and wholesale network capacity
agreements; (ii) borrowings under bank credit facilities; (iii) additional debt
or equity financings; and (iv) any available cash flow from operations. There
can be no assurance that additional financing will be available to the Company
or, if available, that it can be obtained on a timely basis and on acceptable
terms. See "Risk Factors -- Substantial Capital Requirements" and "Management's
Discussion and Analysis of Financial Condition and Results of Operations."
    
 
                         HOLDING COMPANY REORGANIZATION
 
   
     On December 23, 1997, the Company completed a corporate reorganization (the
"Reorganization"), pursuant to which DTI was formed as the parent holding
company of Digital Teleport, which became a wholly owned subsidiary of DTI.
Pursuant to the Reorganization, the outstanding shares of common and preferred
stock of Digital Teleport were exchanged for the number of shares of common and
preferred stock of DTI having the same relative rights and preferences as such
exchanged shares. The Reorganization was required in connection with the
establishment of DTI's former bank credit facility in order to permit the
lending group to take a first priority security interest in all of the issued
and outstanding capital stock of Digital Teleport owned by the Company. The
Company has since terminated the bank credit facility. The business operations,
name, charter, by-laws and board of directors of the Company are identical in
all material respects to those of Digital Teleport prior to the Reorganization.
    
 
     The Company's principal executive offices are located at 11111 Dorsett
Road, St. Louis, Missouri 63043, and its telephone number is (314) 253-6600.
 
                                        9
<PAGE>   11
 
                               THE EXCHANGE OFFER
 
The Exchange Offer.........  The Company is hereby offering to exchange $1,000
                             principal amount at maturity of Exchange Notes for
                             each $1,000 principal amount at maturity of Private
                             Notes that are properly tendered and accepted. As
                             of the date hereof, $506,000,000 aggregate
                             principal amount at maturity of Private Notes is
                             outstanding. The Company will issue the Exchange
                             Notes to Holders promptly following the Expiration
                             Date. See "Risk Factors -- Consequences of Failure
                             to Exchange." Holders of the Private Notes do not
                             have appraisal or dissenter's rights in connection
                             with the Exchange Offer under the Missouri General
                             and Business Corporation Law, the governing law of
                             the state of incorporation of the Company.
 
Minimum Condition..........  The Exchange Offer is not conditioned upon any
                             minimum aggregate principal amount of Private Notes
                             being tendered or accepted for exchange.
 
Expiration Date............  5:00 p.m., New York City time, on             ,
                             1998, unless the Exchange Offer is extended, in
                             which case the term "Expiration Date" means the
                             latest date and time to which the Exchange Offer is
                             extended.
 
Notes Registration Rights
  Agreement................  The Private Notes were sold by the Company on
                             February 23, 1998 to Merrill Lynch, Pierce, Fenner
                             & Smith Incorporated and TD Securities (USA) Inc.,
                             who placed the Private Notes with institutional
                             investors. In connection therewith, the Company
                             executed and delivered for the benefit of the
                             holders of the Private Notes a registration rights
                             agreement (the "Notes Registration Rights
                             Agreement") providing for, among other things,
                             certain exchange and registration rights. The
                             Exchange Offer is intended to satisfy such rights,
                             which will terminate upon the consummation of the
                             Exchange Offer. The Holders of the Exchange Notes
                             will not be entitled to any exchange or
                             registration rights with respect to the Exchange
                             Notes.
 
   
Conditions to the Exchange
  Offer....................  The Exchange Offer is subject to certain customary
                             conditions, which may be waived by the Company. The
                             Exchange Offer is not conditioned upon any minimum
                             aggregate principal amount of Private Notes being
                             tendered for exchange. See "The Exchange
                             Offer -- Conditions." The Company reserves the
                             right to terminate or amend the Exchange Offer at
                             any time prior to the Expiration Date upon the
                             occurrence of any such condition. NO VOTE OF THE
                             COMPANY'S SECURITY HOLDERS IS REQUIRED TO EFFECT
                             THE EXCHANGE OFFER AND NO SUCH VOTE (OR PROXY
                             THEREFOR) IS BEING SOUGHT HEREBY.
    
 
Procedures for Tendering
Private Notes..............  Each Holder of Private Notes wishing to accept the
                             Exchange Offer must complete, sign and date the
                             Letter of Transmittal, or a facsimile thereof, in
                             accordance with the instructions contained herein
                             and therein, and mail or otherwise deliver such
                             Letter of Transmittal, or such facsimile, together
                             with the Private Notes and any other required
                             documentation to The Bank of New York, as exchange
                             agent (the "Exchange Agent"), at the address set
                             forth herein. By executing the
                                       10
<PAGE>   12
 
                             Letter of Transmittal, each Holder will represent
                             to the Company, among other things, that (i) the
                             Exchange Notes acquired pursuant to the Exchange
                             Offer by the Holder and any beneficial owners of
                             Private Notes are being obtained in the ordinary
                             course of business of the person receiving such
                             Exchange Notes, (ii) neither the Holder nor such
                             beneficial owner is participating in, intends to
                             participate in or has an arrangement or
                             understanding with any person to participate in the
                             distribution of such Exchange Notes and (iii)
                             neither the Holder nor such beneficial owner is an
                             "affiliate," as defined under Rule 405 of the
                             Securities Act, of the Company. Each broker-dealer
                             that receives Exchange Notes for its own account in
                             exchange for Private Notes, where such Private
                             Notes were acquired by such broker or dealer as a
                             result of market-making activities or other trading
                             activities (other than Private Notes acquired
                             directly from the Company), may participate in the
                             Exchange Offer but may be deemed an "underwriter"
                             under the Securities Act and, therefore, must
                             acknowledge in the Letter of Transmittal that it
                             will deliver a prospectus in connection with any
                             resale of such Exchange Notes. The Letter of
                             Transmittal states that by so acknowledging and by
                             delivering a prospectus, a broker or dealer will
                             not be deemed to admit that it is an "underwriter"
                             within the meaning of the Securities Act. See "The
                             Exchange Offer -- Procedures for Tendering" and
                             "Plan of Distribution."
 
Special Procedures for
Beneficial Owners..........  Any beneficial owner whose Private Notes are
                             registered in the name of a broker, dealer,
                             commercial bank, trust company or other nominee and
                             who wishes to tender should contact such registered
                             Holder promptly and instruct such registered Holder
                             to tender on such beneficial owner's behalf. If
                             such beneficial owner wishes to tender on such
                             owner's own behalf, such owner must, prior to
                             completing and executing the Letter of Transmittal
                             and delivering his Private Notes, either make
                             appropriate arrangements to register ownership of
                             the Private Notes in such owner's name or obtain a
                             properly completed bond power from the registered
                             Holder. The transfer of registered ownership may
                             take considerable time and may not be able to be
                             completed prior to the Expiration Date. See "The
                             Exchange Offer -- Procedures for Tendering."
 
Guaranteed Delivery
  Procedures...............  Holders of Private Notes who wish to tender their
                             Private Notes and whose Private Notes are not
                             immediately available or who cannot deliver their
                             Private Notes, the Letter of Transmittal or any
                             other documents required by the Letter of
                             Transmittal to the Exchange Agent prior to the
                             Expiration Date must tender their Private Notes
                             according to the guaranteed delivery procedures set
                             forth in "The Exchange Offer -- Guaranteed Delivery
                             Procedures."
 
Withdrawal Rights..........  Tenders may be withdrawn at any time prior to 5:00
                             p.m., New York City time, on the Expiration Date.
                             See "The Exchange Offer -- Withdrawal of Tenders."
 
Acceptance of Private Notes
and Delivery of Exchange
  Notes....................  The Company will accept for exchange any and all
                             Private Notes which are properly tendered in the
                             Exchange Offer prior to 5:00 p.m., New York City
                             time, on the Expiration Date. The Exchange Notes
                             issued
                                       11
<PAGE>   13
 
                             pursuant to the Exchange Offer will be delivered
                             promptly following the Expiration Date. See "The
                             Exchange Offer -- Terms of the Exchange Offer."
 
   
Federal Income Tax
  Consequences.............  The exchange of Private Notes for Exchange Notes by
                             tendering holders will not be a taxable exchange
                             for federal income tax purposes, and such holders
                             will not recognize any taxable gain or loss or any
                             interest income for federal income tax purposes as
                             a result of such exchange (assuming no Special
                             Interest becomes due). However, the Company is not
                             providing a tax opinion to holders of the Notes and
                             recommends that each holder consult such holder's
                             own tax advisor. See "Certain United States Federal
                             Income Tax Considerations."
    
 
Use of Proceeds............  There will be no proceeds to the Company from, and
                             the Company has agreed to bear the expenses of, the
                             Exchange Offer.
 
Effect on Holders of
Private Notes..............  As a result of the making of this Exchange Offer,
                             and upon acceptance for exchange of all validly
                             tendered Private Notes pursuant to the terms of
                             this Exchange Offer, the Company will have
                             fulfilled certain obligations under the terms of
                             the Private Notes and the Notes Registration Rights
                             Agreement and, accordingly, the holders of the
                             Private Notes will have no further registration or
                             other rights under the Notes Registration Rights
                             Agreement, except under certain limited
                             circumstances. See "The Exchange Offer -- Purpose
                             and Effect of the Exchange Offer." Holders of the
                             Private Notes who do not tender their Private Notes
                             in the Exchange Offer will continue to hold such
                             Private Notes and will be entitled to all the
                             rights and limitations applicable thereto under the
                             Indenture. All untendered, and tendered but
                             unaccepted, Private Notes will continue to be
                             subject to the restrictions on transfer provided
                             for in the Private Notes and the Indenture. To the
                             extent that Private Notes are tendered and accepted
                             in the Exchange Offer, the trading market, if any,
                             for the Private Notes not so tendered could be
                             adversely affected. See "Risk
                             Factors -- Consequences of Failure to Exchange."
 
Exchange Agent.............  The Bank of New York is serving as Exchange Agent
                             in connection with the Exchange Offer. See "The
                             Exchange Offer -- Exchange Agent."
 
                   SUMMARY DESCRIPTION OF THE EXCHANGE NOTES
 
     The Exchange Offer applies to $506,000,000 aggregate principal amount at
maturity of Private Notes. The terms of the Exchange Notes are identical in all
material respects to the Private Notes, except that the Exchange Notes have been
registered under the Securities Act and, therefore, will not bear legends
restricting their transfer and will not contain certain terms providing for an
increase in the interest rate on the Private Notes under certain circumstances
relating to the timing of the Exchange Offer, which rights will terminate when
the Exchange Offer is consummated. The Exchange Notes will evidence the same
debt as the Private Notes and will be entitled to the benefits of the Indenture,
under which both the Private Notes were, and the Exchange Notes will be, issued.
See "Description of the Notes."
 
The Exchange Notes.........  $506,000,000 aggregate principal amount at maturity
                             of 12 1/2% Series B Senior Discount Notes due 2008.
 
Maturity Date..............  March 1, 2008
 
                                       12
<PAGE>   14
 
Yield and Interest.........  12 1/2% per annum (computed on a semiannual bond
                             equivalent basis) calculated from February 23, 1998
                             (without giving effect to any allocation of net
                             proceeds of the Private Offering to the Warrants
                             issued in the Private Offering). Cash interest will
                             not accrue on the Exchange Notes prior to March 1,
                             2003, from which time cash interest will accrue on
                             the Exchange Notes at a rate of 12 1/2% per annum.
                             Cash interest on the Exchange Notes is payable
                             semiannually in arrears on March 1 and September 1
                             of each year, commencing September 1, 2003.
 
   
Original Issue Discount....  Each Exchange Note is issued with original issue
                             discount for United States federal income tax
                             purposes. Thus, although cash interest will not
                             begin to accrue on the Exchange Notes until March
                             1, 2003, and there will be no periodic payments of
                             interest on the Exchange Notes prior to September
                             1, 2003, the total amount of original issue
                             discount (i.e., the difference between the stated
                             redemption price at maturity of the Notes and the
                             amount of the issue price of the Units allocated to
                             the Notes) will accrue from the issue date and will
                             be includible as interest income periodically in a
                             holder's gross income for federal income tax
                             purposes in advance of receipt of the cash payments
                             to which the income is attributable. The Private
                             Notes were issued with total original issue
                             discount of approximately $240.8 million. Assuming
                             the Exchange Offer is consummated on September 1,
                             1998, the Exchange Notes will be issued with total
                             original issue discount of approximately $222.3
                             million. See "Certain United States Federal Income
                             Tax Considerations."
    
 
Optional Redemption........  The Exchange Notes will be redeemable at the
                             Company's option, in whole or in part, at any time
                             on or after March 1, 2003 at the redemption prices
                             set forth herein together with accrued interest, if
                             any, to the date of redemption.
 
                             In addition, on or prior to March 1, 2001, the
                             Company may redeem up to 33 1/3% of the aggregate
                             principal amount at maturity of the originally
                             issued Notes with the net proceeds of one or more
                             Public Equity Offerings (as defined) at a
                             redemption price of 112.5% of the Accreted Value
                             thereof; provided that at least 66 2/3% of the
                             aggregate principal amount at maturity of
                             originally issued Notes remains outstanding. See
                             "Description of the Notes -- Redemption."
 
   
Change of Control..........  Upon the occurrence of a Change of Control, each
                             holder of Exchange Notes may require the Company to
                             make an offer to purchase all outstanding Exchange
                             Notes at a purchase price equal to 101% of the
                             Accreted Value thereof, together with accrued
                             interest, if any, to the date of purchase. See
                             "Description of the Notes -- Certain Covenants."
                             There can be no assurance that the Company will
                             have available, or will be able to acquire from
                             alternative sources of financing, funds sufficient
                             to repurchase the Exchange Notes in the event of a
                             Change of Control. See "Risk Factors -- High
                             Leverage; Ability to Service Indebtedness;
                             Restrictive Covenants."
    
 
Ranking....................  The Exchange Notes will be senior unsecured
                             obligations of the Company ranking pari passu in
                             right of payment with all future unsecured senior
                             indebtedness of the Company and senior in right of
                             payment to all future obligations of the Company
                             that are expressly subordinated in
 
                                       13
<PAGE>   15
 
   
                             right of payment to the Exchange Notes. As of March
                             31, 1998, the Company had approximately $268.9
                             million of indebtedness outstanding, all of which
                             represented the Private Notes. As of the date of
                             this Prospectus, the Company has no other
                             indebtedness (including any indebtedness that ranks
                             pari passu with the Notes) outstanding. Because the
                             Company is a holding company that conducts its
                             business through Digital Teleport, its wholly owned
                             subsidiary, all existing and future indebtedness
                             and other liabilities and commitments of the
                             Company's subsidiary, including trade payables,
                             will be effectively senior to the Exchange Notes,
                             and the Company's subsidiary will not be a
                             guarantor of the Notes. As of March 31, 1998,
                             Digital Teleport had aggregate liabilities of $21.1
                             million, including $14.4 million of deferred
                             revenues. Subject to certain limitations, the
                             Company and its Restricted Subsidiaries (as defined
                             herein) may incur additional indebtedness in the
                             future. See "Risk Factors -- High Leverage; Ability
                             to Service Indebtedness; Restrictive Covenants,"
                             "-- Holding Company Structure; Priority of Secured
                             Debt" and "Description of the Notes -- Ranking."
    
 
Certain Covenants..........  The Indenture contains certain covenants that
                             restrict, among other things, the ability of the
                             Company and its Restricted Subsidiaries to (i)
                             incur certain indebtedness, (ii) pay dividends and
                             make certain other restricted payments, (iii)
                             create liens, (iv) permit other restrictions on
                             dividends and other payments by Restricted
                             Subsidiaries, (v) issue and sell capital stock of
                             Restricted Subsidiaries, (vi) guarantee certain
                             indebtedness, (vii) sell assets, (viii) enter into
                             transactions with Affiliates (as defined), (ix)
                             merge, consolidate or transfer substantially all of
                             the assets of the Company and (x) make investments
                             in any Unrestricted Subsidiary (as defined). The
                             covenants require the Company to make an offer to
                             purchase specified amounts of Notes in the event of
                             certain asset sales. There can be no assurance that
                             the Company will have sufficient funds to complete
                             any purchase of Exchange Notes upon such a sale of
                             assets. See "Description of the Notes -- Certain
                             Covenants."
 
                                  RISK FACTORS
 
   
     Holders of the Private Notes should carefully consider the information set
forth in this Prospectus, and in particular, should evaluate the factors set
forth under "Risk Factors" beginning on page 17.
    
 
                                       14
<PAGE>   16
 
               SUMMARY CONSOLIDATED FINANCIAL AND OPERATING DATA
 
   
     The summary consolidated financial data presented below for each of the
three years in the period ended June 30, 1997 have been derived from the audited
consolidated financial statements of the Company, which have been audited by
Deloitte & Touche LLP, independent auditors. The summary consolidated financial
data as of and for the nine-month periods ended March 31, 1997 and 1998 have
been derived from the unaudited consolidated financial statements of the
Company, which have been prepared on the same basis as the audited consolidated
financial statements of the Company and, in the opinion of management, reflect
all normal recurring adjustments necessary for a fair presentation of the
financial position and results of operations as of the end of and for such
periods. The results for the nine months ended March 31, 1998 are not
necessarily indicative of the operating results to be expected for the entire
year. The information set forth below should be read in conjunction with the
discussion under "Management's Discussion and Analysis of Financial Condition
and Results of Operations" and "Business" and the audited and unaudited
consolidated financial statements of the Company and the notes thereto appearing
elsewhere in this Prospectus.
    
 
   
<TABLE>
<CAPTION>
                                                                                           NINE MONTHS ENDED
                                                FISCAL YEAR ENDED JUNE 30,                     MARCH 31,
                                        -------------------------------------------    --------------------------
                                          1995(A)         1996(A)          1997           1997           1998
                                          -------         -------          ----           ----           ----
<S>                                     <C>             <C>            <C>             <C>           <C>
OPERATING STATEMENT DATA:
  Revenue
    Telecommunications services
      Carrier's carrier services......  $         --    $   188,424    $    807,347    $   488,931   $  1,707,914
      End-user services...............       199,537        488,377         515,637        380,914        414,660
    Other services(b).................            --             --         711,006             --             --
                                        ------------    -----------    ------------    -----------   ------------
      Total revenue...................       199,537        676,801       2,033,990        869,845      2,122,574
                                        ------------    -----------    ------------    -----------   ------------
  Operating expenses:
    Telecommunication services........       165,723        296,912         847,190        563,791      1,024,578
    Other services(b).................            --             --         364,495             --             --
    Selling, general and
      administrative..................       240,530        548,613       1,118,809        845,684      2,437,825
    Depreciation and amortization.....        70,500        425,841         757,173        521,049      1,385,750
                                        ------------    -----------    ------------    -----------   ------------
      Total operating expenses........       476,753      1,271,366       3,087,667      1,930,524      4,848,153
                                        ------------    -----------    ------------    -----------   ------------
  Loss from operations................      (277,216)      (594,565)     (1,053,677)    (1,060,679)    (2,725,579)
  Interest income (expense), net......        (9,516)      (191,810)        (51,023)       (94,534)    (2,138,707)
  Loan commitment fees................            --             --        (784,500)      (784,500)            --
  Equity in earnings of joint
    venture...........................            --             --          37,436         37,436             --
                                        ------------    -----------    ------------    -----------   ------------
  Loss before income tax benefit......      (286,732)      (786,375)     (1,851,764)    (1,902,277)    (4,864,286)
  Income tax benefit..................            --             --       1,214,331      1,042,000      2,020,000
                                        ------------    -----------    ------------    -----------   ------------
  Net loss(c).........................     $(286,732)     $(786,375)      $(637,433)     $(860,277)   $(2,844,286)
                                        ============    ===========    ============    ===========   ============
</TABLE>
    
 
   
    
 
   
<TABLE>
<CAPTION>
                                                               AS OF MARCH 31, 1998
                                                               --------------------
<S>                                                            <C>
BALANCE SHEET DATA:
  Cash and cash equivalents.................................       $263,231,384
  Network and equipment, net................................         60,824,950
  Total assets..............................................        338,467,861
  Long-term debt............................................        268,856,985
  Deferred revenues(d)......................................         14,037,528
  Stockholders' equity......................................         48,536,348
</TABLE>
    
 
   
<TABLE>
<CAPTION>
                                                                                           NINE MONTHS ENDED
                                               FISCAL YEAR ENDED JUNE 30,                      MARCH 31,
                                       -------------------------------------------    ---------------------------
                                         1995(A)         1996(A)          1997            1997           1998
                                         -------         -------          ----            ----           ----
<S>                                    <C>             <C>            <C>             <C>            <C>
OTHER FINANCIAL DATA:
  Cash flows from operations.........  $  6,903,884    $   299,710    $  7,674,272    $  4,694,799   $  5,097,421
  Cash flows from investing
    activities.......................   (11,804,176)    (1,122,569)    (19,417,073)    (10,058,794)   (28,210,066)
  Cash flows from financing
    activities.......................     5,030,000      1,500,030      15,292,316      10,314,313    281,977,123
  EBITDA(e)..........................      (206,716)      (168,724)       (259,068)       (502,194)    (1,339,829)
  Capital expenditures...............     6,804,176      5,663,047      19,876,595      10,518,316     28,210,066
  Ratio of earnings to fixed
    charges(f).......................            --             --              --              --             --
</TABLE>
    
 
                                       15
<PAGE>   17
 
   
<TABLE>
<CAPTION>
                                                                                   AS OF
                                                      ---------------------------------------------------------------
                                                      MARCH 31,   JUNE 30,   SEPTEMBER 30,   DECEMBER 31,   MARCH 31,
                                                        1997        1997         1997            1997         1998
                                                      ---------   --------   -------------   ------------   ---------
<S>                                                   <C>         <C>        <C>             <C>            <C>
OTHER OPERATING DATA:
  Route miles.......................................      520         732        1,361           1,427        1,538
  Fiber miles.......................................   33,269      44,071       84,254          87,498       93,006
  POP/Collocation sites(g)..........................       19          24           43              45           45
</TABLE>
    
 
- ---------------
 
   
(a) From its inception in June 1989 through June 30, 1993, the Company had no
    significant operations, assets or liabilities and consisted of nominal
    organizational activities. In addition, through June 30, 1996, the Company
    was considered a development stage enterprise focused on developing the DTI
    network and customer base.
    
 
(b) Other services revenues and expenses in the year ended June 30, 1997 reflect
    the design, construction and installation of innerduct for another carrier's
    fiber optic network.
 
   
(c) Net loss attributable to Common Stock, loss per share data and weighted
    average number of shares outstanding are not meaningful as there was only
    one common shareholder and no class of securities was registered.
    
 
   
(d) Does not include current portion of deferred revenues in the amount of
    approximately $366,000 as of March 31, 1998. See "Capitalization."
    
 
   
(e) EBITDA represents net loss before interest income (expense), loan commitment
    fees, income tax benefit, depreciation and amortization. EBITDA is included
    because the Company understands that such information is commonly used by
    investors in the telecommunications industry as an additional basis on which
    to evaluate the Company's ability to pay interest, repay debt and make
    capital expenditures. Excluded from EBITDA are interest income (expense),
    loan commitment fees, income taxes, depreciation and amortization, each of
    which can significantly affect the Company's results of operations and
    liquidity and should be considered in evaluating the Company's financial
    performance. EBITDA is not intended to represent, and should not be
    considered more meaningful than, or an alternative to, measures of operating
    performance determined in accordance with generally accepted accounting
    principles ("GAAP"). Additionally, EBITDA should not be used as a comparison
    between companies, as it may not be calculated in a similar manner by all
    companies.
    
 
   
(f) For purposes of calculating the ratio of earnings to fixed charges: (i)
    earnings consist of loss before income tax benefit, plus fixed charges
    excluding capitalized interest; and (ii) fixed charges consist of interest
    expenses and capitalized costs, amortization of deferred financing costs,
    plus the portion of rentals considered to be representative of the interest
    factor (one-third of lease payments). For the years ended June 30, 1995,
    1996 and 1997, and for the nine months ended March 31, 1997 and 1998, the
    Company's earnings were insufficient to cover fixed charges by approximately
    $296,000, $2.0 million, $2.4 million, $2.5 million and $4.9 million,
    respectively.
    
 
   
(g) Consists of interconnections with ILEC access tandems, ILEC central offices,
    IXC POPs, and DTI's network control center and POP buildings.
    
 
                                       16
<PAGE>   18
 
                                  RISK FACTORS
 
     In addition to the other information in this Prospectus, before tendering
their Private Notes for the Exchange Notes offered hereby, holders of Private
Notes should consider carefully the following factors, which may be generally
applicable to the Private Notes as well as to the Exchange Notes.
 
CONSEQUENCES OF FAILURE TO EXCHANGE
 
     Holders of Private Notes who do not exchange their Private Notes for
Exchange Notes pursuant to the Exchange Offer will continue to be subject to the
restrictions on transfer of such Private Notes, as set forth in the legend
thereon, as a consequence of the issuance of the Private Notes pursuant to
exemptions from, or in transactions not subject to, the registration
requirements of the Securities Act and applicable state securities laws. The
Company does not currently anticipate that it will register the Private Notes
under the Securities Act. Based on interpretations by the staff of the
Commission set forth in no-action letters issued to third parties, including
Exxon Capital Holdings Corporation, SEC No-Action Letter (available April 13,
1988) (the "Exxon Capital Letter"), Morgan Stanley & Co. Incorporated, SEC
No-Action Letter (available June 5, 1991) (the "Morgan Stanley Letter"), and
similar letters, the Company believes that the Exchange Notes issued pursuant to
the Exchange Offer may be offered for resale, resold or otherwise transferred by
any Holder thereof (other than any such Holder which is an "affiliate" of the
Company within the meaning of Rule 405 under the Securities Act) without
compliance with the registration and prospectus delivery provisions of the
Securities Act, provided that such Exchange Notes are acquired in the ordinary
course of such Holder's business and such Holder has no arrangement with any
person to participate in the distribution of such Exchange Notes.
Notwithstanding the foregoing, each broker-dealer that receives Exchange Notes
for its own account pursuant to the Exchange Offer must acknowledge that it will
deliver a prospectus in connection with any resale of such Exchange Notes. The
Letter of Transmittal states that by so acknowledging and by delivering a
prospectus, a broker-dealer will not be deemed to admit that it is an
"underwriter" within the meaning of the Securities Act. This Prospectus, as it
may be amended or supplemented from time to time, may be used by a broker-dealer
in connection with any resale of Exchange Notes received in exchange for Private
Notes where such Private Notes were acquired by such broker-dealer as a result
of market-making activities or other trading activities (other than Private
Notes acquired directly from the Company). The Company has agreed that, for a
period of 120 days from the Expiration Date, it will make this Prospectus
available to any broker-dealer for use in connection with any such resale. See
"Plan of Distribution." Any holder who tenders in the Exchange Offer for the
purpose of participating in a distribution of the Exchange Notes cannot rely on
the Morgan Stanley Letter or similar letters and must comply with the
registration and prospectus delivery requirements of the Securities Act in
connection with a secondary resale transaction. To the extent that Private Notes
are tendered and accepted in the Exchange Offer, the trading market, if any, for
the Private Notes not so tendered could be adversely affected. See "The Exchange
Offer."
 
FAILURE TO COMPLY WITH EXCHANGE OFFER PROCEDURES
 
     Issuance of the Exchange Notes in exchange for the Private Notes pursuant
to the Exchange Offer will be made only after timely receipt by the Exchange
Agent of such Private Notes, a properly completed and duly executed Letter of
Transmittal and all other required documents. Therefore, holders of the Private
Notes desiring to tender such Private Notes in exchange for Exchange Notes
should allow sufficient time to ensure timely delivery. The Company is under no
duty to give notification of defects or irregularities with respect to tenders
of Private Notes for exchange. Holders of Private Notes who do not exchange
their Private Notes for Exchange Notes pursuant to the Exchange Offer will
continue to be subject to the restrictions on transfer of such Private Notes as
set forth in the legend thereon. See "The Exchange Offer."
 
LIMITED HISTORY OF OPERATIONS; OPERATING LOSSES AND NEGATIVE CASH FLOW
 
     Digital Teleport was formed in June 1989 and began offering
telecommunications services in February 1994. Prospective investors, therefore,
have limited historical financial information about the Company upon which to
base an evaluation of the Company's performance and an investment in the Notes.
As a result of development and operating expenses, the Company has incurred
significant operating and net
 
                                       17
<PAGE>   19
 

 
   
losses to date. Operating losses for fiscal 1995, 1996 and 1997, and the nine
months ended March 31, 1998 were approximately $277,000, $595,000, $1.1 million
and $2.7 million, respectively. DTI's operations have resulted in net losses
before interest income (expense), loan commitment fees, income tax benefit,
depreciation and amortization of $207,000, $169,000 and $259,000 for the years
ended June 30, 1995, 1996 and 1997, respectively, and $1.3 million for the nine
months ended March 31, 1998. In addition, the Company's accumulated deficit was
approximately $6.2 million at March 31, 1998. The Company expects to incur
significant operating losses, to generate negative net cash flows after capital
expenditures and to invest substantial funds to construct the DTI network during
the next several years while the Company continues to develop and expand its
telecommunications services and customer base. There can be no assurance that
the Company will achieve or sustain profitability or generate sufficient
positive cash flow to meet its debt service obligations and working capital
requirements. If the Company cannot achieve operating profitability or positive
cash flows from operating activities, it may not be able to service the Notes or
to meet its other debt service or working capital requirements, which would have
a material adverse effect on the Company. See "-- Substantial Capital
Requirements," "Selected Consolidated Financial Data" and "Management's
Discussion and Analysis of Financial Condition and Results of Operations."
    
 
HIGH LEVERAGE; ABILITY TO SERVICE INDEBTEDNESS; RESTRICTIVE COVENANTS
 
   
     The Company is and will continue to be highly leveraged. As of March 31,
1998, the Company had approximately $268.9 million of indebtedness outstanding,
all of which was evidenced by the Private Notes. Because the Company is a
holding company that conducts its business through Digital Teleport, all
existing and future indebtedness and other liabilities and commitments of the
Company's subsidiary, including trade payables, are effectively senior to the
Notes, and the Company's subsidiary will not be a guarantor of the Notes. As of
March 31, 1998, Digital Teleport had aggregate liabilities of $21.1 million,
including $14.4 million of deferred revenues. See "-- Holding Company Structure;
Priority of Secured Debt," "Capitalization" and "Selected Consolidated Financial
Data." The Indenture limits but does not prohibit the incurrence of additional
indebtedness by the Company, and the Company expects to incur additional
indebtedness in the future. The Company's leverage could result in adverse
consequences to the holders of the Notes. Such consequences may include, among
other things: (i) a substantial portion of the Company's cash flow will be
dedicated to the payment of the Company's interest expense and may be
insufficient to meet such payment obligations on the Notes, in addition to
paying other indebtedness and obligations of the Company as they become due;
(ii) the Company's ability to obtain any necessary financing in the future for
completion of the DTI network or other purposes may be impaired; (iii) certain
of the future borrowings by the Company may be at variable rates of interest
that could cause the Company to be vulnerable to increases in interest rates;
(iv) the Company may be more leveraged than certain of its competitors, which
may place the Company at a competitive disadvantage; and (v) the Company's
vulnerability to the effects of general economic downturns or to delays in or
increases in the cost of constructing the DTI network may be increased. The
Company's ability to pay the principal of and interest on its indebtedness will
depend upon the Company's future performance, which is subject to a variety of
factors, uncertainties and contingencies, many of which are beyond the Company's
control. There can be no assurance that the Company will generate sufficient
cash flow in the future to enable it to meet its anticipated debt service
requirements, including those with respect to the Notes. See "Management's
Discussion and Analysis of Financial Condition and Results of Operations."
    
 
   
     The Indenture imposes and will impose significant operating and financial
restrictions on the Company, Digital Teleport and any future subsidiaries. These
restrictions affect, and in certain cases significantly limit or prohibit, among
other things, the ability of the Company and its subsidiary to incur certain
indebtedness, pay dividends and make certain other restricted payments, create
liens, permit other restrictions on dividends and other payments by Restricted
Subsidiaries, issue and sell capital stock of Restricted Subsidiaries, guarantee
certain indebtedness, sell assets, enter into transactions with affiliates or
related persons, or consolidate, merge or transfer all or substantially all of
their assets. There can be no assurance that such covenants will not adversely
affect the Company's ability to finance its future operations or capital needs
or to engage in other business activities. Further, there can be no assurance
that the Company will have available, or will be able to
    
 
                                       18
<PAGE>   20
 
   
acquire from alternative sources of financing, funds sufficient to repurchase
the Exchange Notes in the event of a Change of Control. See "Description of the
Notes."
    
 
     In addition, any future senior indebtedness incurred by the Company is
likely to impose similar restrictions on the Company. Failure by the Company or
its subsidiaries to comply with these restrictions could lead to a default under
the terms of such indebtedness and the Notes notwithstanding the ability of the
Company to meet its debt service obligations. In the event of such a default,
the holders of such indebtedness could elect to declare all such indebtedness to
be due and payable, together with accrued and unpaid interest. In such event, a
significant portion of the Company's indebtedness (including the Notes) may
become immediately due and payable, and there can be no assurance that the
Company would be able to make such payments or borrow sufficient funds from
alternative sources to make any such payment. Even if additional financing could
be obtained, there can be no assurance that it would be on terms that are
acceptable to the Company.
 
HOLDING COMPANY STRUCTURE; PRIORITY OF SECURED DEBT
 
   
     The Company is a holding company with no direct operations and no
significant assets other than the stock of Digital Teleport. The Company is
dependent on the cash flow of Digital Teleport to meet its obligations,
including the payment of interest and principal on the Notes. Subject to the
Indenture provisions that limit restrictions on the ability of any of the
Company's Restricted Subsidiaries to pay dividends and make other payments to
the Company, future debt instruments of Digital Teleport may impose significant
restrictions that may affect, among other things, the ability of Digital
Teleport to pay dividends or make loans, advances or other distributions to the
Company. The ability of Digital Teleport to pay dividends and make other
distributions also will be subject to, among other things, applicable state laws
and regulations. There can be no assurance that Digital Teleport will be able to
pay, or will generate sufficient earnings or cash flow to distribute, any cash
dividends or make any loans, advances or other payments of funds to the Company,
the failure of which would have a material adverse effect on the Company's
ability to meet its obligations on the Exchange Notes. See "Description of the
Notes -- Certain Covenants -- Limitations on Dividends and Other Payment
Restrictions Affecting Restricted Subsidiaries."
    
 
   
     Digital Teleport is a separate legal entity that has no obligation to pay
any amounts due pursuant to the Notes or to make any funds available therefor,
whether by dividends, loans or other payments. Because Digital Teleport does not
guarantee the payment of the principal or interest on the Notes, any right of
the Company to receive assets of Digital Teleport upon its liquidation or
reorganization (and the consequent right of holders of the Notes to participate
in the distribution or realize proceeds from those assets) are effectively
subordinated to the claims of the creditors of Digital Teleport (including trade
creditors and holders of indebtedness of such subsidiary), except if and to the
extent the Company is itself a creditor of Digital Teleport, in which case the
claims of the Company would still be effectively subordinated to any security
interest in the assets of Digital Teleport held by other creditors. As of March
31, 1998, Digital Teleport had aggregate liabilities of $21.1 million, including
$14.4 million of deferred revenues.
    
 
   
     The Notes are unsecured and will be effectively subordinated to any future
secured indebtedness of the Company to the extent of the value of the assets
securing such indebtedness. As of March 31, 1998, the Company had no secured
indebtedness and no indebtedness that ranked pari passu with the Notes. The
Indenture permits the Company or Digital Teleport to incur additional secured
indebtedness, including purchase money indebtedness in unlimited amounts, and
indebtedness pursuant to one or more bank credit facilities of up to $70.0
million and the greater of (i) 80% of DTI's accounts receivable or (ii) $30.0
million. See "Description of the Notes." The Company expects that indebtedness
under any bank credit facility will be secured by a pledge by the Company of
100% of the capital stock of Digital Teleport and present and future
subsidiaries of Digital Teleport and all assets held directly by Digital
Teleport and its subsidiaries, and will be guaranteed by such subsidiaries.
Consequently, in the event of a bankruptcy, liquidation, dissolution,
reorganization or similar proceeding with respect to the Company, such assets
will be available to satisfy obligations of such secured debt before any payment
can be made on the Notes. In addition, to the extent such assets would not
satisfy in full such secured indebtedness, the holders of such indebtedness will
have a claim
    
 
                                       19
<PAGE>   21
 
for any shortfall that is pari passu (or effectively senior if the indebtedness
were issued by Digital Teleport) with the Notes. Accordingly, there may only be
a limited amount of assets available to satisfy any claims of the holders of the
Notes upon an acceleration of the Notes.
 
SUBSTANTIAL CAPITAL REQUIREMENTS
 
   
     The development of the Company's business and the installation and
expansion of the DTI network have required and will continue to require
substantial capital. In the past, the Company has funded its capital
expenditures through advance payments from certain of its customers prior to
network construction and private debt and equity financing. The Company is
funding its future capital expenditure requirements through the net proceeds of
the Private Offering, advance payments under existing and additional dark fiber
leases and wholesale network capacity agreements, borrowings under bank credit
facilities, additional debt or equity financings and any available cash flow
from operations. The Company estimates that total capital expenditures to
complete the DTI network will be approximately $673.2 million. Of this amount,
the Company had already expended approximately $62.8 million as of March 31,
1998. The Company anticipates total capital expenditures of approximately $16.6
million in the fourth quarter of fiscal 1998 and $410.1 million in fiscal 1999.
The Company's estimated capital requirements primarily include the estimated
cost of (i) completing the DTI network and (ii) network expansion activities,
including the construction of additional local loops in secondary and tertiary
cities as network traffic volume increases. The Company also may require
additional capital in the future to fund operating deficits and net losses and
for potential strategic alliances, joint ventures and acquisitions. These
activities could require significant additional capital not included in the
foregoing estimated capital requirements.
    
 
   
     The Company is in various stages of discussions with potential customers
for additional IRUs and wholesale network capacity agreements. There can be no
assurance, however, that the Company will continue to obtain advance payments
from customers prior to commencing construction or that other sources of capital
will be available on a timely basis and on terms that are acceptable to the
Company and within the restrictions under the Company's existing financing
arrangements, or at all. If the Company fails to obtain the capital required to
complete the DTI network build-out, the Company could modify, defer or abandon
building certain portions of the DTI network. The failure of the Company,
however, to raise the substantial capital required to complete the DTI network
construction could have a material adverse effect on the Company. See "-- Risks
Related to Completing the DTI Network; Increasing Traffic Volume" and
"Management's Discussion and Analysis of Financial Condition and Results of
Operations -- Liquidity and Capital Resources."
    
 
     The Company's expectation of required future capital is based on the
Company's current estimates. The actual amount and timing of DTI's future
capital requirements may differ materially from these estimates depending on
demand for the Company's services, the Company's ability to implement its
current business strategy and as a result of regulatory, technological and
competitive developments in the telecommunications industry. There can be no
assurance that actual expenditures will not differ significantly from such
estimates. The Company may seek to raise additional capital from public or
private equity or debt sources. There can be no assurance that the Company will
be able to raise such capital on satisfactory terms or at all. If the Company
decides to raise additional capital through the incurrence of debt, the Company
may become subject to additional or more restrictive financial covenants. In the
event that the Company is unable to obtain such additional capital on acceptable
terms or at all, the Company may be required to reduce the scope or pace of
deployment of the DTI network, which could materially adversely affect the
Company's business, results of operations and financial condition and its
ability to compete.
 
RISKS RELATED TO COMPLETING THE DTI NETWORK; INCREASING TRAFFIC VOLUME
 
     The Company's ability to achieve its strategic objectives will depend in
large part upon the successful, timely and cost-effective completion of the DTI
network, as well as on achieving substantial traffic volumes on the DTI network.
The construction of the DTI network may be affected by a variety of factors,
uncertainties and contingencies, many of which are beyond the Company's control.
There can be no assurance that the DTI
 
                                       20
<PAGE>   22
 
 
network will be completed as planned at the cost and in the timeframe currently
estimated, if at all. Although the Company believes that its cost estimates and
build-out schedule are reasonable, there can be no assurance that the actual
construction costs or time required to complete the construction of the DTI
network will not substantially exceed current estimates. In addition, the
Company must substantially increase its current traffic volume in order to
realize expected cash flows, operating efficiencies and cost benefits of the DTI
network. There can be no assurance that the Company will be able to achieve such
increased traffic volume. See "-- Pricing Pressures and Industry Capacity."

   
     The successful and timely construction of the DTI network will depend upon,
among other things, the Company's ability to (i) obtain substantial amounts of
additional capital and financing, at reasonable costs and on satisfactory terms
and conditions, (ii) effectively and efficiently manage the construction of the
DTI network route segments, (iii) access markets and enter into additional
customer contracts to sell or lease high volume capacity on the DTI network and
(iv) obtain additional franchises, permits and rights-of-way to permit it to
complete its planned strategic routing. Successful construction of the DTI
network also will depend upon the timely performance by third-party contractors
of their obligations. Certain of the Company's customer contracts provide for
reduced payments and varying penalties for late delivery of route segments and
allow the customers, after expiration of grace periods, to delete such
non-delivered segment from the system route to be delivered. The Company is
currently not in compliance with construction schedules under contracts with two
of its customers. The Company has received notice from a customer that it
intends to setoff against amounts payable to the Company of approximately
$75,000 (in addition to $400,000 set off against previous payments) as damages
and penalties under the Company's contract with that customer due to the failure
by the Company to meet certain construction deadlines, and such customer
reserved its rights to seek other remedies under the contract. The Company
believes that if such additional setoff were to be made, it would not be
material to the Company's business, financial position or results of operations.
The Company is behind schedule with respect to such contract as a result of such
customer's not obtaining on behalf of the Company certain rights-of-way required
for completion of certain network facilities, and the Company's limitations on
its financial and human resources, particularly prior to the Private Offering.
The Company has obtained alternative rights-of-way and hired additional
construction supervisory personnel to accelerate the completion of such
construction. Upon completion, such customer is contractually required to pay
the Company a lump sum of approximately $4.2 million for the Company's
telecommunications services over its network. The Company is also behind
schedule in the construction of fiber optic facilities for another customer,
which facilities were to have been completed in December 1997, primarily as a
result of a delay in obtaining rights-of-way required for completion of certain
network facilities, and the Company's limitations on its financial and human
resources, particularly prior to the Private Offering. The Company is in what it
believes to be are final negotiations for the needed right-of-way, and as
indicated above has hired additional construction supervisory personnel. Upon
completion, such customer will begin paying the Company $133,000 per month for
the use of such completed facilities. There can be no assurance that such
customers or other customers will not in the future find the Company to have
materially breached its contracts, that such customers will not terminate such
contracts or that such customers will not seek other remedies. There can be no
assurance that the Company will obtain sufficient capital and financing to fund
its currently planned capital expenditures, successfully manage construction,
sell fiber and capacity to additional customers, meet contractual timetables for
future services, or maintain existing and acquire necessary additional
franchises, permits and rights-of-way. Any failure by DTI to accomplish these
objectives may significantly delay or prevent completion of the DTI network,
which would have a material adverse effect on the Company's business, financial
condition and results of operations.
    
 
COMPETITION
 
   
     The telecommunications industry is highly competitive. The Company competes
and, as it expands its network within and outside the Midwest region, expects to
compete with numerous established facilities-based IXCs, ILECs and CLECs. These
competitors have substantially greater financial and technical resources,
long-standing relationships with their customers and the potential to subsidize
competitive services from less competitive service revenues. DTI is aware that
other facilities-based providers of local and long
    
 
                                       21
<PAGE>   23
 
distance telecommunications services are planning and constructing additional
networks that, if and when completed, could employ advanced fiber optic
technology similar to the DTI network. Such competing networks may also have
operating capabilities similar to those of the DTI network and be positioned
geographically to compete directly with the DTI network for many of the same
customers along a significant portion of the same routes.
 
   
     The Company competes primarily on the basis of price, transmission quality,
reliability and customer service and support. The Company's competitors in
carrier's carrier services include many large and small IXCs, including AT&T,
MCI, Sprint, WorldCom, Qwest Communications International Inc. ("Qwest") and
McLeod, Inc. ("McLeod"). The Company competes with both LECs and IXCs in its
end-user business. In the local exchange market, the Company also faces or
expects to face competition from ILECs and other competitive providers,
including non-facilities based providers, and, as the local access markets
become opened to IXCs under the Telecommunications Act of 1996 (the "Telecom
Act"), from long distance providers. AT&T, MCI and Sprint, among other carriers,
have each indicated their intention to begin offering local telecommunications
services in major U.S. markets using their own facilities or by resale of the
ILECs' or other providers' services and either have begun or will likely begin
offering local exchange service in certain states, subject to the certain
restrictions contained in the Telecom Act. See "Business -- Regulatory Matters."
WorldCom, together with its wholly owned subsidiaries MFS Communications
Company, Inc. ("MFS") and Brooks Fiber Properties, Inc. ("Brooks Fiber"),
currently provides both local exchange and long distance telecommunications
services throughout the United States. WorldCom also announced its agreement to
acquire MCI. In addition, AT&T has recently announced its agreement to acquire
Teleport Communications Group, Inc. ("TCG"), a facilities-based CLEC with
networks in operation in 57 markets in the United States, and SBC
Communications, Inc. ("SBC") has announced agreements to acquire Ameritech Corp.
("Ameritech"), one of the original seven Regional Bell Operating Companies
("RBOCs"), and Southern New England Telecommunications Corp. ("SNET"). Further,
Qwest, a communications provider building a 16,000-mile fiber optic network in
the United States, announced its agreement to acquire LCI International Inc., a
retail long distance provider, which acquisition would create the nation's fifth
largest long distance company. The Company also believes that high initial
network cost and low marginal costs of carrying long distance traffic have led
to a trend among non-facilities-based carriers to consolidate in order to
achieve economies of scale. Such consolidation among significant
telecommunications carriers could result in larger, better capitalized
competitors that can offer a "one-stop shopping" combination of long distance
and local switched services in many of DTI's target markets.
    
 
   
     Certain companies have recently announced efforts to use Internet
technologies to supply telecommunications services, potentially leading to a
lower cost of supplying these services and therefore increased pressure on IXCs
and other telecommunications companies to reduce their prices. There can be no
assurance that the Company's IXC and other carrier customers will not experience
substantial decreases in call volume or pricing due to competition from
Internet-based telecommunications, which could lead to a decreased need for the
Company's services, or a reduction in the amount these companies are willing or
able to pay for the Company's services. There can also be no assurance that the
Company will be able to offer its telecommunications services to end users at a
price that is competitive with the Internet-based telecommunications services
offered by these new companies. The Company does not currently market to
Internet service providers ("ISPs") and therefore may not realize any revenues
from the Internet-based telecommunications market. If the Company does commence
marketing to ISP's, there can be no assurance that it will be able to do so
successfully, which would have a material adverse effect on the Company's
business, financial condition and results of operations.
    
 
     In addition to IXCs and LECs, entities potentially capable of offering
switched services in competition with the DTI network include cable television
companies, electric utilities, microwave carriers, wireless telephone system
operators and large subscribers who build private networks. Previous impediments
to certain utility companies entering telecommunications markets under the
Public Utility Holding Company Act of 1935 were also removed by the Telecom Act,
creating a new competitive threat for DTI.
 
     In the future, the Company may be subject to more intense competition due
to the development of new technologies, an increased supply of domestic and
international transmission capacity, the consolidation in the
                                       22
<PAGE>   24
 
industry among local and long distance service providers and the effects of
deregulation resulting from the Telecom Act. The telecommunications industry is
experiencing a period of rapid technological evolution, marked by the
introduction of new product and service offerings and increasing satellite
transmission capacity for services similar to those provided by the Company. For
instance, recent technological advances permit substantial increases in
transmission capacity of both new and existing fiber, and the introduction of
new products or emergence of new technologies may reduce the cost or increase
the supply of certain services similar to those provided by the Company. The
Company cannot predict which of many possible future product and service
offerings will be crucial to maintain its competitive position or what
expenditures will be required to develop profitably and provide such products
and services.
 
   
     Many of the Company's competitors and potential competitors have financial,
personnel, marketing and other resources significantly greater than those of the
Company, as well as other competitive advantages. A continuing trend toward
business combinations and alliances in the telecommunications industry may
increase the resources available to DTI's competitors, create significant new
competitors and potentially decrease the Company's carrier customer base. The
ability of DTI to compete effectively will depend upon, among other things, its
ability to deploy the DTI network and to maintain high quality services at
prices equal to or below those charged by its competitors. There can be no
assurance that the Company will be able to compete successfully with existing
competitors or new entrants in the markets for carrier's carrier services and
end-user services. Failure of the Company to do so would have a material adverse
effect on the Company. See "Business -- Competition."
    
 
NEED TO OBTAIN AND MAINTAIN FRANCHISES, PERMITS AND RIGHTS-OF-WAY
 
     In order to develop its networks, the Company must obtain local franchises
and other permits, as well as rights to utilize underground conduit, pole space
and other rights-of-way from entities such as utilities, state highway
authorities, local governments, ILECs and IXCs. The Telecom Act requires that
local governmental authorities treat telecommunications carriers in a
competitively neutral, non-discriminatory manner, and that most utilities,
including electric companies and most ILECs, afford CLECs access to their
conduits, poles and rights-of-way at reasonable rates and on non-discriminatory
terms and conditions. The Company has entered into long-term agreements with
highway authorities in Missouri and Arkansas and with electric utilities
operating in Missouri and southern Illinois, pursuant to which the Company
generally has access to various rights-of-ways in given localities. There can be
no assurance that the Company will be able to maintain its existing franchises,
permits and rights-of-way or to obtain and maintain the other franchises,
permits and rights-of-way needed to implement its business plan on acceptable
terms and to complete its planned strategic routing. Although the Company does
not believe that any of its existing franchises, permits or rights-of-way will
be terminated or not renewed as needed, termination or non-renewal of certain of
such franchises, permits or rights-of-way relating to a significant portion of
the DTI network could materially adversely affect the Company. See "Business --
The DTI Network -- Highway and Utility Rights-of-Way."
 
DEPENDENCE ON LIMITED NUMBER OF LARGE CUSTOMERS
 
     The Company has substantial business relationships with a few large
customers. See "Management's Discussion and Analysis of Financial Condition and
Results of Operations." In addition, the Company's business plan assumes that a
large proportion of its future revenues will come from its carrier's carrier
services, which by their nature are marketed to a limited number of
telecommunications carriers. Therefore, dissatisfaction with the Company's
services by a relatively few number of customers could have a material adverse
effect on the Company's business, financial condition and results of operations.
See "-- Risks Related to Completing the DTI Network; Increasing Traffic Volume."
The Company is aware that certain IXCs are constructing or considering
construction of new networks, or buying companies with local networks, which
could reduce their need for the Company's services. See "Risk
Factors -- Competition." In addition, it is possible that as IXCs expand their
product offerings and networks, and the Company expands its product offerings
and the geographic scope of the DTI network, the Company may become a competitor
of one or more of its large customers for certain end-user customers.
Accordingly, there can be no assurance that any of the Company's carrier's
carrier customers will continue to use or increase their use of the Company's
services,
 
                                       23
<PAGE>   25
 
which would have a material adverse effect on the Company's business, financial
condition and results of operations.
 
EXPANSION AND MANAGING RAPID GROWTH
 
     The expansion of the DTI network and the Company's services will depend on,
among other things, its ability to enter new markets, design fiber optic network
routes, install facilities and obtain rights-of-way, building access and any
required government authorizations and/or permits, all in a timely manner, at
reasonable costs and on satisfactory terms and conditions. The expansion of the
DTI network and services also will require substantial growth in the Company's
management base, systems and other operations. Implementation of the Company's
current and future expansion plans will also depend on factors such as: (i) the
availability of financing and regulatory approvals; (ii) the existence of
strategic alliances or relationships; (iii) technological, regulatory or other
developments in the Company's business; (iv) changes in the competitive climate
in which the Company operates; and (v) the emergence of future opportunities.
There can be no assurance that the Company will be able to expand its existing
network or services in a cost effective manner.
 
   
     A key part of the Company's business strategy is to achieve rapid growth by
expanding the DTI network throughout the Midwest region and to the east and west
coasts of the United States and using the DTI network and services to exploit
opportunities expected to arise from regulatory and technological changes and
other industry developments. The Company's ability to manage its expansion
effectively will depend upon, among other things: (i) expansion, training and
management of its employee base, including attracting and retaining highly
skilled personnel; (ii) expansion and improvement of the Company's customer
service and support systems and improvement or cost-effective outsourcing of the
Company's operational and financial systems; (iii) development, introduction and
marketing of new products and services; and (iv) control of the Company's
expenses. The failure of the Company to satisfy these requirements and to
otherwise manage its growth effectively would have a material adverse effect on
the Company.
    
 
DEPENDENCE ON KEY PERSONNEL
 
     The Company's future performance depends to a significant degree upon the
continued contributions of a small number of key executives, particularly
Richard D. Weinstein, the Company's founder, Chief Executive Officer and
President. The Company has entered into employment agreements with certain of
these executives. Nonetheless, the loss of these individuals and the inability
of the Company to attract and retain suitable replacements could have a material
adverse effect on the Company's business, financial condition, results of
operations and business prospects. See "Management -- Executive Officers and
Directors" and "Management -- Employment Agreements." The Company's future
success and ability to manage growth will be dependent also upon its ability to
hire additional highly skilled employees for a variety of management,
engineering, technical, and sales and marketing positions. The competition for
such personnel is intense. There can be no assurance that the Company will be
able to attract and retain sufficient qualified personnel. The failure to do so
could have a material adverse effect on the Company.
 
DEPENDENCE ON SINGLE OR LIMITED SOURCE SUPPLIERS
 
   
     The Company is dependent upon single or limited source suppliers for a
number of components and parts used in the DTI network. In particular, the
Company is dependent primarily on Pirelli Cable Corporation ("Pirelli") for its
supply of fiber optic cable. The Company's arrangements have provided it with a
supply of fiber optic cable at a stable, attractive price. DTI's network design
strategy also is dependent on obtaining transmission equipment from Fujitsu and
dense wavelength division multiplexing equipment from another supplier, both of
which supply such equipment to other substantially larger customers. There can
be no assurance that the Company's suppliers will be able to meet the Company's
future requirements on a timely basis. The Company believes that there are
alternative suppliers or alternative components for all of the components
contained in the DTI network. However, any extended interruption in the supply
of any of the key components currently obtained from a single or limited source,
disturbance in the pricing arrangements with Pirelli or Fujitsu, or delay in
transitioning a replacement supplier's product into the DTI network, could
    
                                       24
<PAGE>   26
 
   
disrupt the Company's operations and have a material adverse effect on the
Company's operating results. There can be no assurance that such interruption,
disturbance or delay will not occur or that the Company will be successful in
obtaining alternative suppliers. Significant delays in the expansion of the DTI
network resulting from interruptions in the supply of any key network components
or other problems with suppliers could have a material adverse effect on the
Company.
    
 
PRICING PRESSURES AND INDUSTRY CAPACITY
 
   
     Although the Company believes that, in the last several years, increasing
demand has corrected the telecommunications capacity supply imbalance and slowed
the decline in prices, the Company anticipates that prices for carrier's carrier
services and end-user services will continue to decline over the next several
years due primarily to (i) installation of additional fiber that provides
substantially more transmission capacity than will be needed over the short or
medium term, (ii) technological advances that permit substantial increases in
the transmission capacity of both new and existing fiber, and (iii) strategic
alliances or similar transactions, such as long distance capacity purchasing
alliances among certain RBOCs, that increase customer purchasing power. Such
price decreases, without offsetting decreases in the Company's cost of services
or increases in demand for the Company's services, could have a material adverse
effect on the Company. See "Management's Discussion and Analysis of Financial
Condition and Results of Operations."
    
 
RAPID TECHNOLOGICAL CHANGES
 
   
     The telecommunications industry is subject to rapid and significant changes
in technology. For instance, recent technological advances permit substantial
increases in transmission capacity of both new and existing fiber, and the
introduction of new products or the emergence of new technologies may reduce the
cost or increase the supply of certain services similar to those provided by the
Company. While the Company believes that, for the foreseeable future,
technological changes will neither materially affect the continued use of fiber
optic cable nor materially hinder the Company's ability to acquire necessary
technologies, the actual effect of technological changes on the Company's
operations cannot be predicted and could have a material adverse effect on the
Company.
    
 
DEVELOPMENT OF ACCOUNTING, BILLING, CUSTOMER SERVICE AND MANAGEMENT INFORMATION
SYSTEMS
 
     Sophisticated information and processing systems are vital to the Company's
operations and growth and its ability to monitor costs, render monthly invoices
for services, process customer orders, provide customer service and achieve
operating efficiencies. The Company intends to install the accounting,
information and processing systems necessary to provide its services efficiently
throughout the Midwest region. However, there can be no assurance that the
Company will be able to successfully install or operate such systems. As the
Company begins to provide local switched services, the need for sophisticated
billing and information systems will also increase significantly and the Company
will have significant additional requirements for data interface with ILECs.
Additionally, any acquisitions would place additional burdens on the Company's
accounting, information and other systems.
 
   
     While the Company believes that its existing systems and software
applications are, and that any new systems to be installed will be, Year 2000
compliant, there can be no assurance until the year 2000 that all of the
Company's systems then in place will function adequately. The failure of the
Company's systems or software applications to accommodate the year 2000 could
have a material adverse effect on its business, financial condition and results
of operations and its ability to meet its obligations on the Notes. Further, if
the systems or software applications of telecommunications equipment suppliers,
ILECs, IXCs or others on whose services or products the Company depends are not
Year 2000 compliant, any loss of such services or products could have a material
adverse effect on the Company's business, financial condition and results of
operations. The Company intends to continue to monitor the performance of its
accounting, information and processing systems and software applications and
those of its third-party constituents to identify and resolve any Year 2000
issues. To the extent necessary, the Company may need to replace, upgrade or
reprogram certain systems to ensure that all interfacing applications will be
Year 2000 compliant when operating jointly. Based on current information, the
Company does not expect that the costs of such replacements, upgrades and
    
                                       25
<PAGE>   27
 
   
reprogramming will be material to its business, financial condition or results
of operations. Most major domestic carriers have announced that they expect to
achieve Year 2000 compliance for their networks and support systems by mid-1999;
however, other domestic and international carriers and other third-party
constituents may not be Year 2000 compliant, and failures on their networks and
systems could adversely affect the operation of the Company's networks and
support systems and have a material adverse effect on the Company's business,
financial condition and results of operations and its ability to meet its
obligations on the Notes.
    
 
     Unanticipated problems in any of the above areas, or the Company's
inability to implement solutions in a timely manner or to establish or upgrade
systems as necessary, could have a material adverse impact on the ability of the
Company to reach its objectives and on its business, financial condition and
results of operations.
 
REGULATION RISKS
 
     The Company is required to obtain certain authorizations from the FCC and
state public utility commissions ("PUCs") to offer certain of its
telecommunications services, as well as to file tariffs for many of its
services. To date, the Company has not experienced significant difficulties in
receiving certification, maintaining tariffs, or otherwise complying with its
regulatory obligations. The Company will face new obligations arising out of the
Telecom Act as it begins to enter the local telephone market. It also is likely
that state PUCs will regulate the local telephone services offered by the
Company and other competitive local exchange carriers more heavily than
competitive long distance services have been regulated in the past. Because the
FCC and the states have yet to adopt many of the rules and policies necessary to
implement the Telecom Act, or to respond to other related local telephone
competition issues, it is uncertain how burdensome these requirements will be
for the Company.
 
     The Company's plans to provide local switched services are heavily
dependent upon implementation of provisions of the Telecom Act. The Telecom Act
preempted state and local laws to the extent that they prohibited local
telephone competition, and imposed a variety of new duties on incumbent local
exchange carriers intended to advance such competition, including the duty to
negotiate in good faith with competitors requesting interconnection to the
ILEC's network. However, negotiations with ILECs have sometimes involved
considerable delays and the resulting negotiated agreements may not necessarily
be obtained on terms and conditions that are acceptable to the Company. In such
instances, the Company may petition the proper state regulatory agency to
arbitrate disputed issues. There can be no assurance that the Company will be
able to negotiate acceptable new interconnection agreements with ILECs or that
if state regulatory authorities impose terms and conditions on the parties in
arbitration, such terms will be acceptable to the Company.
 
   
     On August 8, 1996, the FCC adopted rules and policies implementing the
local competition provisions of the Telecom Act, which rules, in general, are
considered favorable to new competitive entrants, but those rules have not been
fully implemented. On October 15, 1996, the U.S. Court of Appeals for the Eighth
Circuit (the "Eighth Circuit") issued a stay of the implementation of certain of
the FCC's rules, and on July 18, 1997, the Eighth Circuit issued its decision
finding that the FCC lacked statutory authority under the Telecom Act for
certain of its rules. In particular, the Eighth Circuit found that the FCC was
not empowered to establish the pricing standards governing unbundled local
network elements or wholesale local services of the incumbent local exchange
carriers. The Eighth Circuit also struck down other FCC rules, including one
that would have enabled new entrants to "pick and choose" from provisions of
established interconnection agreements between the incumbent local exchange
carriers and other carriers. The Eighth Circuit rejected certain other
objections to the FCC rules brought by the ILECs or the states, including
challenges to the FCC's definition of unbundled elements, and to the FCC's rules
allowing new competitors to create their own networks by combining ILECs network
elements together without adding additional facilities of their own. The overall
impact of the Eighth Circuit's decision is to materially reduce the role of the
FCC in fostering local competition, including its ability to take enforcement
action if the Telecom Act is violated, and to increase the role of state utility
commissions. The Supreme Court recently announced that it will review the Eighth
Circuit's decision. Meanwhile, certain state commissions have asserted that they
will be active in promoting local telephone competition using the authority they
have under the ruling, lessening the significance of the
    
                                       26
<PAGE>   28
 
reduced FCC role. At this time the impact of the Eighth Circuit's decision
cannot be evaluated, but there can be no assurance that the Eighth Circuit
decision and related developments will not have a material adverse effect on the
Company. Furthermore, other FCC rules related to local telephone competition
remain the subject of legal challenges, and there can be no assurance that
decisions affecting those rules will not be adverse to companies seeking to
enter the local telephone market.
 
     Although the Company believes that the Telecom Act and other state and
federal regulatory initiatives that favor increased competition are advantageous
to the Company, there can be no assurance that changes in current or future
state or federal regulations, including changes that may result from court
review of the FCC's interconnection rules, or increased competitive
opportunities resulting from such changes, will not have a material adverse
effect on the Company.
 
   
     The Telecom Act also creates the foundation for increased competition in
the long distance market from ILECs, which could affect the successful
implementation of the Company's business plans. For example, certain provisions
eliminate previous prohibitions on the provision of inter-LATA long distance
services (both carrier's carrier and end-user services) by the RBOCs, subject to
compliance by such companies with requirements set forth in the Telecom Act and
implemented by the FCC. On December 31, 1997, the U.S. District Court, Northern
District of Texas (Wichita Falls) ("Court"), in SBC Communications, Inc. v. FCC
and U.S. (the "SBC Communications Case"), overturned as unconstitutional the
provisions of the Telecom Act which prohibited RBOCs from providing inter-LATA
long distance services within their own region without demonstrating that the
local exchange market was opened to local competition. The decision, however,
affects only SBC Communications, Inc. and U.S. West, Inc. Nonetheless, other
RBOCs may use the decision to petition courts in their operating regions to
obtain similar rulings. On January 2, 1998, AT&T, MCI and other intervenors in
the SBC Communications Case filed a petition for stay with the Court. On January
5, 1997, the FCC also filed a petition for stay of the decision in the Court. On
February 11, 1998, the Court temporarily stayed its decision in the SBC
Communications Case, which stay places those provisions of the Telecom Act which
had been found unconstitutional back into effect and forecloses, temporarily,
the RBOCs from providing inter-LATA long distance service within their own
service regions without FCC approval. The Company would be adversely affected if
the RBOCs are allowed to provide wireline inter-LATA long distance services
within their own regions before local competition is established. In a related
development, the FCC is considering proposed new policies and rules that would
grant the ILECs additional flexibility in the pricing of interstate access
services, and states are considering or are expected to consider ILECs' requests
for similar regulatory relief with respect to intrastate services. Such
flexibility is likely to come first for services offered in the business market.
Any pricing flexibility or other significant deregulation of the ILECs could
have a material adverse effect on the Company. See "Business -- Regulatory
Matters."
    
 
ORIGINAL ISSUE DISCOUNT CONSEQUENCES
 
   
     The Private Notes were issued with original issue discount for U.S. federal
income tax purposes. Since the Exchange Notes are treated as a continuation of
the Private Notes for federal income tax purposes, the Exchange Notes will also
be considered to have been issued at a substantial discount. Consequently,
holders of the Exchange Notes generally will be required to include amounts in
gross income for U.S. federal income tax purposes in advance of receipt of the
cash payments to which the income is attributable. In addition, the Exchange
Notes will be subject to the applicable high-yield discount obligation rules,
which will defer and, in part, eliminate the Company's ability to deduct for
U.S. federal income tax purposes the original issue discount attributable to the
Exchange Notes. Accordingly, the Company's after-tax cash flow will be less than
if the original issue discount on the Exchange Notes were deductible when it
accrued. See "Certain United States Federal Income Tax Considerations" for a
more detailed discussion of the U.S. federal income tax consequences to the
Company and the beneficial owners of the Exchange Notes resulting from the
purchase, ownership and disposition of the Private Notes.
    
 
     Furthermore, if a bankruptcy case is commenced by or against the Company
under the United States Bankruptcy Code after the issuance of the Exchange
Notes, the claim of a holder of Exchange Notes may be limited to an amount equal
to the sum of the issue price as determined by the bankruptcy court and that
 
                                       27
<PAGE>   29
 
portion of the original issue discount which is deemed to accrue from the issue
date to the date of any such bankruptcy filing.
 
ABSENCE OF A PUBLIC MARKET FOR THE NOTES
 
     The Private Notes are eligible for trading in the Private Offering Resale
and Trading through Automated Linkages ("PORTAL") market. The Exchange Notes
will be securities for which there is no public market. The Company does not
intend to apply for listing of the Exchange Notes on any securities exchange or
for quotation of the Exchange Notes on the Nasdaq National Market. The Company
has been advised by the Initial Purchasers that they presently intend to make a
market in the Exchange Notes, as permitted by applicable laws and regulations.
The Initial Purchasers are not obligated, however, to make a market in the
Exchange Notes, and any such market making activity may be discontinued at any
time without notice at the sole discretion of each Initial Purchaser. There can
be no assurance as to the liquidity of the public market for the Exchange Notes,
the ability of holders to sell the Exchange Notes, or the price at which holders
would be able to sell the Exchange Notes, or that an active public market for
the Exchange Notes will develop. If an active public market does not develop,
the market price and liquidity of the Exchange Notes may be adversely affected.
See "Plan of Distribution."
 
     Historically, the market for non-investment grade debt has been subject to
disruptions that have caused substantial volatility in the prices of securities
similar to the Exchange Notes. There can be no assurances that any market for
the Exchange Notes will not be subject to similar disruptions.
 
CONTROL OF THE COMPANY; CONFLICTS OF INTEREST
 
     Each of Mr. Weinstein and KLT beneficially owns approximately 45.9% of the
outstanding voting equity securities of the Company, on a fully diluted basis.
Accordingly, they are and will be able to control the management policy of the
Company and all fundamental corporate actions, including mergers, substantial
acquisitions and dispositions, and election of the Board of Directors of the
Company (the "Board"). In addition, Mr. Weinstein and KLT have entered into a
voting agreement with respect to the election of directors. See "Management --
Executive Officers and Directors" and "Principal Stockholders."
 
     Certain decisions concerning the operations or financial structure of the
Company may present conflicts of interest between the Company's shareholders and
the holders of the Exchange Notes. For example, if the Company encounters
financial difficulties or is unable to pay its debts as they mature, the
interests of the Company's shareholders and holders of the Warrants might
conflict with those of the holders of the Exchange Notes. In addition, the
Company's shareholders and holders of the Warrants may have an interest in
pursuing acquisitions, divestitures, financings, mergers, consolidations or
other transactions that, in their judgment, could enhance their equity
investment, even though such transactions might involve risk to the holders of
the Exchange Notes. Because Mr. Weinstein and KLT are able to control the
management policy of the Company and all fundamental corporate actions, any such
conflict of interest may be resolved in favor of the Company's shareholders and
holders of the Warrants and to the detriment of the holders of the Exchange
Notes.
 
VARIABILITY OF OPERATING RESULTS
 
     As the Company expands the DTI network, it will incur significant costs
relating principally to fiber, switching and other equipment and construction
costs. See "-- Substantial Capital Requirements." The installation and expansion
of the DTI network has required and will continue to require considerable
expenses in advance of anticipated revenues and may cause substantial
fluctuations in the Company's operating results. The Company expects to incur
substantial and increasing operating losses and negative net cash flow after
capital expenditures for the foreseeable future as it expands its marketing
efforts and installs the DTI network. The losses created by this lag in revenues
are expected to increase until the revenues from the completed DTI network
overtakes the costs associated with its deployment. The Company does not expect
positive cash flow after capital expenditures from its network operations for
several years. See "-- Limited History of Operations; Operating Losses and
Negative Cash Flow" and "Management's Discussion and Analysis of Financial
Condition and Results of Operations."



                                       28
<PAGE>   30
 
                               THE EXCHANGE OFFER
 
PURPOSE AND EFFECT OF THE EXCHANGE OFFER
 
     The Private Notes were sold by the Company on February 23, 1998 to the
Initial Purchasers, who privately placed the Private Notes with institutional
investors. In connection therewith, the Company and the Initial Purchasers
entered into a Notes Registration Rights Agreement (the "Notes Registration
Rights Agreement"), pursuant to which the Company agreed, for the benefit of the
holders of the Private Notes, that the Company would, at its sole expense, (i)
within 50 days following the original issuance of the Private Notes ("Original
Issue Date"), file with the Commission the Exchange Offer Registration Statement
(of which this Prospectus is a part) under the Securities Act with respect to an
issue of a series of Exchange Notes of the Company identical in all material
respects to the series of Private Notes, (ii) use its best efforts to cause such
Exchange Offer Registration Statement to become effective under the Securities
Act within 180 days following the Original Issue Date, and (iii) use its best
effort to consummate the Exchange Offer within 210 days after the Original Issue
Date. Upon the Exchange Offer Registration Statement (of which this Prospectus
is a part) being declared effective, the Company will offer the Exchange Notes
in exchange for the Private Notes. The Company will keep the Exchange Offer open
for not less than 20 business days (or longer if required by applicable law)
after the date notice of the Exchange Offer is mailed to the holders of the
Private Notes. For each Private Note surrendered to the Company, the Holder of
such Private Note will receive an Exchange Note for a like principal amount at
maturity equal to that of the surrendered Private Notes. The term "Holder" with
respect to the Exchange Offer means any person in whose name Private Notes are
registered on the books of the Company or any other person who has obtained a
properly completed bond power from the registered holder.
 
     Under existing interpretations of the staff of the Commission contained in
several no-action letters to third parties, the Exchange Notes would in general
be freely tradeable after the Exchange Offer without further registration under
the Securities Act. However, any holder of Private Notes who is an "affiliate"
of the Company or who intends to participate in the Exchange Offer for the
purpose of distributing the Exchange Notes (i) will not be able to rely on the
interpretations of the staff of the Commission, (ii) will not be able to tender
its Private Notes in the Exchange Offer and (iii) must comply with the
registration and prospectus delivery requirements of the Securities Act in
connection with any sale or transfer of the Private Notes unless such sale or
transfer is made pursuant to an exemption from such requirements.
 
     Each holder of the Private Notes (other than certain specified holders) who
wishes to exchange Private Notes for Exchange Notes in the Exchange Offer will
be required to represent that (i) it is not an affiliate of the Company, (ii)
any Exchange Notes to be received by it were acquired in the ordinary course of
its business and (iii) at the time of commencement of the Exchange Offer, it had
no arrangement with any person to participate in the distribution (within the
meaning of the Securities Act) of the Exchange Notes. In addition, in connection
with the resale of the Exchange Notes, any broker-dealer (a "Participating
Broker-Dealer") who acquired the Exchange Notes for its own account as a result
of marketmaking or other trading activities must deliver a prospectus meeting
the requirements of the Securities Act. The Commission has taken the position
that Participating Broker-Dealers may fulfill their prospectus delivery
requirements with respect to the Exchange Notes (other than a resale of an
unsold allotment from the original sale of the Notes) with the prospectus
contained in the Exchange Offer Registration Statement. Under the Notes
Registration Rights Agreement, the Company is required to allow Participating
Broker-Dealers and other persons, if any, subject to similar prospectus delivery
requirements to use the prospectus contained in the Exchange Offer Registration
Statement in connection with the resale of the Exchange Notes.
 
     In the event that any changes in law or applicable interpretations of the
staff of the Commission do not permit the Company to effect the Exchange Offer,
or if for any reason the Exchange Offer is not consummated within 210 days
following the Original Issue Date, or if any holder of the Private Notes (other
than the Initial Purchasers) is not eligible to participate in the Exchange
Offer, or upon the request of either Initial Purchaser under certain
circumstances, the Company will, at its cost (a) as promptly as practicable,
file the Shelf Registration Statement covering resales of the Private Notes, (b)
use its best efforts to cause the Shelf Registration Statement to be declared
effective under the Securities Act by the 210th day after the
 
                                       29
<PAGE>   31
 
Original Issue Date and (c) use its best efforts to keep effective the Shelf
Registration Statement until two years after its effective date (or until one
year after such effective date if such Shelf Registration Statement is filed at
the request of either Initial Purchaser) or such shorter period which will
terminate when all of the Private Notes covered by the Shelf Registration
Statement have been sold pursuant thereto. The Company will, in the event of the
filing of a Shelf Registration Statement, provide to each holder of the Private
Notes copies of the prospectus which is a part of the Shelf Registration
Statement, notify each such holder when the Shelf Registration Statement for the
Private Notes has become effective and take certain other actions as are
required to generally permit unrestricted resales of the Notes. A holder of the
Private Notes that sells such Notes pursuant to the Shelf Registration Statement
generally will be required to be named as a selling securityholder in the
related prospectus and to deliver a prospectus to purchasers, will be subject to
certain of the civil liability provisions under the Securities Act in connection
with such sales and will be bound by the provisions of the Notes Registration
Rights Agreement which are applicable to such a holder (including certain
indemnification obligations). In addition, each holder of the Private Notes will
be required to deliver information to be used in connection with the Shelf
Registration Statement and to provide comments on the Shelf Registration
Statement within the time periods set forth in the Notes Registration Rights
Agreement in order to have their Private Notes included in the Shelf
Registration Statement and to benefit from the provisions regarding liquidated
damages set forth in the following paragraph.
 
     In the event that (i) the Exchange Offer Registration Statement is not
declared effective on or prior to the 180th calendar day following the Original
Issue Date, (ii) the Exchange Offer is not consummated or, if required, a Shelf
Registration Statement with respect to the Private Notes is not declared
effective on or prior to the 210th calendar day following the Original Issue
Date or (iii) the Exchange Offer Registration Statement is declared effective
but thereafter ceases to be effective or usable (each event referred to in
clauses (i) through (iii) above, a "Registration Default"), then the Company
will be required to pay additional interest in cash on each Interest Payment
Date in an amount equal to one-half of one percent (0.5%) per annum of the
principal amount with respect to the first 90-day period following such
Registration Default. The amount of such additional interest will increase by an
additional one-half of one percent (0.5%) to a maximum or one and one-half
percent (1.5%) per annum for each subsequent 90-day period until such
Registration Default has been cured. Upon (x) the effectiveness of the Exchange
Offer Registration Statement after the 180-day period described in clause (ii)
above, (y) the consummation of the Exchange Offer or the effectiveness of a
Shelf Registration Statement, as the case may be, after the 210-day period
described in clause (ii) above, or (z) the cure of any Registration Default
described in clause (iii) above, such additional interest shall cease to accrue
from the date of such filing, effectiveness, consummation or cure, as the case
may be, if the Company is otherwise in compliance with this paragraph; provided,
however, that if, after any such additional interest ceases to accrue, a
different event specified in clause (i), (ii) or (iii) above occurs, such
additional interest will again accrue pursuant to the foregoing provisions.
During any 365-day period, the Company will have the ability to suspend the
availability of such Shelf Registration Statement for up to two periods of up to
45 consecutive days (except for the consecutive 45-day period immediately prior
to maturity of the Private Notes), but no more than an aggregate 60 days during
any 365-day period, if any event shall occur as a result of which it shall be
necessary, in the good faith determination of the Board of Directors, to amend
the Shelf Registration Statement or amend or supplement any prospectus or
prospectus supplement thereunder in order that each such document not include
any untrue statement of fact or omit to state a material fact necessary to make
the statements therein not misleading in light of the circumstances under which
they were made.
 
     The summary herein of certain provisions of the Notes Registration Rights
Agreement does not purport to be complete and is subject to, and is qualified in
its entirety by reference to, all the provision of the Notes Registration Rights
Agreement, a copy of which is available upon request to the Company. As a result
of the making of this Exchange Offer, and upon acceptance for exchange of all
validly tendered Private Notes pursuant to the terms of this Exchange Offer, the
Company will have fulfilled certain obligations under the terms of the Private
Notes and the Notes Registration Rights Agreement and, accordingly, the holders
of the Private Notes will have no further registration or other rights under the
Notes Registration Rights Agreement, except under certain limited circumstances.
 
                                       30
<PAGE>   32
 
TERMS OF THE EXCHANGE OFFER
 
     Upon the terms and subject to the conditions set forth in this Prospectus
and in the Letter of Transmittal, the Company will accept any and all Private
Notes validly tendered and not withdrawn prior to 5:00 p.m., New York City time,
on the Expiration Date. The Company will issue $1,000 principal amount at
maturity of Exchange Notes in exchange for each $1,000 principal amount at
maturity of outstanding Private Notes accepted in the Exchange Offer. Holders
may tender some or all of their Private Notes pursuant to the Exchange Offer.
However, Private Notes may be tendered only in integral multiples of $1,000
principal amount at maturity.
 
     The form and terms of the Exchange Notes will be identical in all material
respects to the form and terms of the Private Notes, except that (i) the
Exchange Notes will have been registered under the Securities Act and hence will
not bear legends restricting the transfer thereof and (ii) the holders of the
Exchange Notes will not be entitled to certain rights under the Notes
Registration Rights Agreement, including the terms providing for an increase in
the interest rate on the Private Notes under certain circumstances relating to
the timing of the Exchange Offer, all of which rights will terminate when the
Exchange Offer is consummated. The Exchange Notes will evidence the same debt as
the Private Notes and will be entitled to the benefits of the Indenture under
which the Private Notes were, and the Exchange Notes will be, issued.
 
     As of the date of this Prospectus, $506,000,000 aggregate principal amount
at maturity of the Private Notes was outstanding, all of which is registered in
the name of Cede & Co., as nominee for The Depository Trust Company (the
"Depository"). Only a registered holder of the Private Notes (or such holder's
legal representative or attorney-in-fact) as reflected on the records of the
Trustee under the Indenture may participate in the Exchange Offer. Solely for
reasons of administration, the Company has fixed the close of business on
            , 1998 as the record date for the Exchange Offer for purposes of
determining the persons to whom this Prospectus, together with the Letter of
Transmittal, will initially be sent. There will be no fixed record date for
determining registered holders of the Private Notes entitled to participate in
the Exchange Offer.
 
     Holders of Private Notes do not have any appraisal or dissenters' rights
under the Missouri General and Business Corporation Law or the Indenture in
connection with the Exchange Offer. The Company intends to conduct the Exchange
Offer in accordance with the applicable requirements of the Exchange Act and the
rules and regulations of the Commission thereunder.
 
     The Company shall be deemed to have accepted validly tendered Private Notes
when, as and if the Company has given oral or written notice thereof to the
Exchange Agent. The Exchange Agent will act as agent for the tendering Holders
for the purpose of receiving the Exchange Notes from the Company.
 
     If any tendered Private Notes are not accepted for exchange because of an
invalid tender, the occurrence of certain other events set forth herein or
otherwise, certificates for any such unaccepted Private Notes will be returned,
without expense, to the tendering Holder thereof as promptly as practicable
after the Expiration Date.
 
     Holders who tender Private Notes in the Exchange Offer will not be required
to pay brokerage commissions or fees or, subject to the instructions in the
Letter of Transmittal, transfer taxes with respect to the exchange of Private
Notes pursuant to the Exchange Offer. The Company will pay all charges and
expenses, other than certain applicable taxes, in connection with the Exchange
Offer. See "-- Fees and Expenses."
 
EXPIRATION DATE; EXTENSIONS; AMENDMENTS
 
     The term "Expiration Date" shall mean 5:00 p.m., New York City time, on
            , 1998, unless the Company, in its sole discretion, extends the
Exchange Offer, in which case the term "Expiration Date" shall mean the latest
date and time to which the Exchange Offer is extended.
 
                                       31
<PAGE>   33
 
     In order to extend the Exchange Offer, the Company will notify the Exchange
Agent of any extension by oral or written notice and will make a public
announcement thereof prior to 9:00 a.m., New York City time, on the next
business day after each previously scheduled Expiration Date.
 
     The Company reserves the right, in its sole discretion, (i) to delay
accepting any Private Notes, to extend the Exchange Offer or, if any of the
conditions set forth below under the caption "Conditions" shall not have been
satisfied, to terminate the Exchange Offer, by giving oral or written notice of
such delay, extension or termination to the Exchange Agent, or (ii) to amend the
terms of the Exchange Offer in any manner. Any such delay in acceptance,
extension, termination or amendment will be followed as promptly as practicable
by a public announcement thereof. If the Exchange Offer is amended in a manner
determined by the Company to constitute a material change, the Company will
promptly disclose such amendment by means of a prospectus supplement that will
be distributed to the registered holders, and the Company will extend the
Exchange Offer for a period of five to ten business days, depending upon the
significance of the amendment and the manner of disclosure to the registered
Holders, if the Exchange Offer would otherwise expire during such five to ten
business day period.
 
     Without limiting the manner in which the Company may choose to make a
public announcement of any delay, extension, termination or amendment of the
Exchange Offer, the Company shall have no obligation to publish, advertise, or
otherwise communicate any such public announcement, other than by making a
timely release to the Dow Jones News Service.
 
INTEREST ON THE EXCHANGE NOTES
 
   
     No cash interest will accrue or be payable on the Exchange Notes prior to
March 1, 2003. The Exchange Notes offered hereby will accrete original issue
discount at a rate of 12 1/2% per annum from the Original Issue Date until March
1, 2003. Thereafter, the Exchange Notes will bear interest at the rate of
12 1/2% per annum which will be payable in cash semiannually on March 1 and
September 1 of each year, commencing September 1, 2003. Interest on the Private
Notes accepted for exchange will cease to accrete upon issuance of the Exchange
Notes.
    
 
PROCEDURES FOR TENDERING
 
     Only a Holder of Private Notes may tender such Private Notes in the
Exchange Offer. A Holder who wishes to tender Private Notes for exchange
pursuant to the Exchange Offer must transmit a properly completed and duly
executed Letter of Transmittal, or a facsimile thereof, including any other
required documents, to the Exchange Agent prior to 5:00 p.m., New York City
time, on the Expiration Date. In addition, either (i) certificates for such
Private Notes must be received by the Exchange Agent along with the Letter of
Transmittal or (ii) the Holder must comply with the guaranteed delivery
procedures described below. To be tendered effectively, the Private Notes, the
Letter of Transmittal and other required documents must be received by the
Exchange Agent at the address set forth below under "Exchange Agent" prior to
5:00 p.m., New York City time, on the Expiration Date.
 
     The tender by a Holder will constitute an agreement between such Holder and
the Company in accordance with the terms and subject to the conditions set forth
herein and in the Letter of Transmittal.
 
     The method of delivery of the Private Notes and the Letter of Transmittal
and all other required documents to the Exchange Agent is at the election and
risk of the Holder. Instead of delivery by mail, it is recommended that Holders
use an overnight or hand delivery service. In all cases, sufficient time should
be allowed to assure delivery to the Exchange Agent before the Expiration Date.
No Letter of Transmittal or Private Notes should be sent to the Company. Holders
may request their respective brokers, dealers, commercial banks, trust companies
or nominees to effect the above transactions for such Holders.
 
     Any beneficial owner whose Private Notes are registered in the name of a
broker, dealer, commercial bank, trust company or other nominee and who wishes
to tender should contact the registered Holder promptly and instruct such
registered Holder to tender on such beneficial owner's behalf. If such
beneficial owner wishes to tender on such owner's own behalf, such owner must,
prior to completing and executing the Letter of Transmittal and delivering such
owner's Private Notes, either make appropriate arrangements to register
ownership of the Private Notes in such owner's name or obtain a properly
completed bond power from
 
                                       32
<PAGE>   34
 
the registered Holder. The transfer of registered ownership may take
considerable time and may not be able to be completed prior to the Expiration
Date.
 
   
     Signatures on a Letter of Transmittal or a notice of withdrawal, as the
case may be, must be guaranteed by an Eligible Institution (as defined herein)
unless the Private Notes tendered pursuant thereto are tendered (i) by a
registered Holder who has not completed the box entitled "Special Registration
Instructions" or "Special Delivery Instructions" on the Letter of Transmittal or
(ii) for the account of an Eligible Institution. In the event that signatures on
a Letter of Transmittal or a notice of withdrawal, as the case may be, are
required to be guaranteed, such guarantee must be by a member firm of a
registered national securities exchange or of the NASD, a commercial bank or
trust company having an office or correspondent in the United States or an
"eligible guarantor institution" within the meaning of Rule 17Ad-15 under the
Exchange Act (an "Eligible Institution").
    
 
     If the Letter of Transmittal is signed by a person other than the
registered Holder of any Private Notes listed therein, such Private Notes must
be endorsed or accompanied by a properly completed bond power, signed by such
registered Holder as such registered Holder's name appears on such Private
Notes.
 
     If the Letter of Transmittal or any Private Notes or bond powers are signed
by trustees, executors, administrators, guardians, attorneys-in-fact, officers
of corporations or others acting in a fiduciary or representative capacity, such
persons should so indicate when signing, and unless waived by the Company,
evidence satisfactory to the Company of their authority to so act must be
submitted with the Letter of Transmittal.
 
     All questions as to the validity, form, eligibility (including time of
receipt), acceptance and withdrawal of tendered Private Notes will be determined
by the Company in its sole and absolute discretion, which determination will be
final and binding. The Company reserves the absolute right to reject any and all
Private Notes not properly tendered or any Private Notes the Company's
acceptance of which would, in the opinion of counsel for the Company, be
unlawful. The Company also reserves the right to waive any defects,
irregularities or conditions of tender as to particular Private Notes. The
Company's interpretation of the terms and conditions of the Exchange Offer
(including the instructions in the Letter of Transmittal) will be final and
binding on all parties. Unless waived, any defects or irregularities in
connection with tenders of Private Notes must be cured within such time as the
Company shall determine. Although the Company intends to notify Holders of
defects or irregularities with respect to tenders of Private Notes, neither the
Company, the Exchange Agent nor any other person shall incur any liability for
failure to give such notification. Tenders of Private Notes will not be deemed
to have been made until such defects or irregularities have been cured or
waived. Any Private Notes received by the Exchange Agent that are not properly
tendered and as to which the defects or irregularities have not been cured or
waived will be returned by the Exchange Agent to the tendering Holders, unless
otherwise provided in the Letter of Transmittal, as soon as practicable
following the Expiration Date.
 
     By tendering, each Holder will represent to the Company, among other
things, that (i) the Exchange Notes to be acquired by the Holder and any
beneficial owners of Private Notes pursuant to the Exchange Offer are being
obtained in the ordinary course of business of the person receiving such
Exchange Notes, (ii) the Holder and each such beneficial owner are not
participating, do not intend to participate and have no arrangement or
understanding with any person to participate in the distribution of such
Exchange Notes and (iii) neither the Holder nor any such other person is an
"affiliate," as defined under Rule 405 of the Securities Act, of the Company.
Each broker or dealer that receives Exchange Notes for its own account in
exchange for Private Notes, where such Private Notes were acquired by such
broker or dealer as a result of market-making activities or other trading
activities (other than Private Notes acquired directly from the Company), must
acknowledge that it will deliver a prospectus in connection with any resale of
such Exchange Notes. See "Plan of Distribution."
 
BOOK-ENTRY TRANSFER
 
     The Exchange Agent will make a request to establish an account with respect
to the Private Notes at the Depository for purposes of the Exchange Offer within
two business days after the date of this Prospectus, and any financial
institution that is a participant in the Depository's systems may make
book-entry delivery of
 
                                       33
<PAGE>   35
 
Private Notes by causing the Depository to transfer such Private Notes into the
Exchange Agent's account at the Depository in accordance with the Depository's
procedures for transfer. However, although delivery of Private Notes may be
effected through book-entry transfer at the Depository, the Letter of
Transmittal or facsimile thereof, with any required signature guarantees and any
other required documents, must, in any case, be transmitted to and received by
the Exchange Agent at the address set forth below under "-- Exchange Agent" on
or prior to the Expiration Date or pursuant to the guaranteed delivery
procedures described below.
 
GUARANTEED DELIVERY PROCEDURES
 
     Holders who wish to tender their Private Notes and (i) whose Private Notes
are not immediately available or (ii) who cannot deliver their Private Notes,
the Letter of Transmittal or any other required documents to the Exchange Agent
prior to the Expiration Date, may effect a tender if:
 
          (a) the tender is made through an Eligible Institution;
 
          (b) prior to the Expiration Date, the Exchange Agent receives from
     such Eligible Institution a properly completed and duly executed Notice of
     Guaranteed Delivery (by facsimile transmission, mail or hand delivery)
     setting forth the name and address of the Holder, the certificate number(s)
     of such Private Notes and the principal amount of Private Notes tendered,
     stating that the tender is being made thereby and guaranteeing that, within
     three New York Stock Exchange trading days after the Expiration Date, the
     Letter of Transmittal (or facsimile thereof) together with the
     certificate(s) representing the Private Notes and any other documents
     required by the Letter of Transmittal will be deposited by the Eligible
     Institution with the Exchange Agent; and
 
          (c) such properly completed and executed Letter of Transmittal (or
     facsimile thereof), as well as the certificate(s) representing all tendered
     Private Notes in proper form for transfer and all other documents required
     by the Letter of Transmittal are received by the Exchange Agent within
     three New York Stock Exchange trading days after the Expiration Date. Upon
     request to the Exchange Agent, a Notice of Guaranteed Delivery will be sent
     to Holders who wish to tender their Private Notes according to the
     guaranteed delivery procedures set forth above.
 
WITHDRAWAL OF TENDERS
 
     Except as otherwise provided herein, tenders of Private Notes may be
withdrawn at any time prior to 5:00 p.m., New York City time, on the Expiration
Date.
 
     To withdraw a tender of Private Notes in the Exchange Offer, a written or
facsimile transmission notice of withdrawal must be received by the Exchange
Agent at its address set forth herein prior to 5:00 p.m., New York City time, on
the Expiration Date. Any such notice of withdrawal must (i) specify the name of
the person having deposited the Private Notes to be withdrawn (the "Depositor"),
(ii) identify the Private Notes to be withdrawn (including the certificate
number or numbers and principal amount of such Private Notes), (iii) be signed
by the Holder in the same manner as the original signature on the Letter of
Transmittal by which such Private Notes were tendered (including any required
signature guarantees) or be accompanied by documents of transfer sufficient to
have the Trustee with respect to the Private Notes register the transfer of such
Private Notes into the name of the person withdrawing the tender and (iv)
specify the name in which any such Private Notes are to be registered, if
different from that of the Depositor. If certificates for Private Notes have
been delivered or otherwise identified to the Exchange Agent, then, prior to the
release of such certificates, the withdrawing Holder must also submit the serial
numbers of the particular certificates to be withdrawn and a signed notice of
withdrawal with signatures guaranteed by an Eligible Institution unless such
Holder is an Eligible Institution. All questions as to the validity, form and
eligibility (including time of receipt) of such notices will be determined by
the Company in its sole discretion, which determination shall be final and
binding on all parties.
 
     Any Private Notes so withdrawn will be deemed not to have been validly
tendered for purposes of the Exchange Offer and no Exchange Notes will be issued
with respect thereto unless the Private Notes so withdrawn are validly
retendered. Properly withdrawn Private Notes may be retendered by following one
of
 
                                       34
<PAGE>   36
 
the procedures described above under "-- Procedures for Tendering" at any time
prior to the Expiration Date. Any Private Notes which have been tendered but
which are not accepted for payment due to withdrawal, rejection of tender or
termination of the Exchange Offer will be returned as soon as practicable to the
Holder thereof without cost to such Holder.
 
CONDITIONS
 
     Notwithstanding any other term of the Exchange Offer, the Company shall not
be required to accept for exchange, or exchange Exchange Notes for, any Private
Notes, and may terminate the Exchange Offer as provided herein before the
acceptance of such Private Notes, if:
 
   
          (a) any action or proceeding is instituted or threatened in any court
     or by or before any governmental agency with respect to the Exchange Offer
     which, in the sole judgment of the Company, might materially impair the
     ability of the Company to proceed with the Exchange Offer or materially
     impair the contemplated benefits of the Exchange Offer to the Company or
     might be material to Holders in deciding whether to accept the Exchange
     Offer, or any material adverse development has occurred in any existing
     action or proceeding with respect to the Company or any of its
     subsidiaries; or
    
 
   
          (b) any change, or any development involving a prospective change, in
     the business or financial affairs of the Company or any of its subsidiaries
     has occurred which, in the sole judgment of the Company, might materially
     impair the ability of the Company to proceed with the Exchange Offer or
     materially impair the contemplated benefits of the Exchange Offer to the
     Company or might be material to Holders in deciding whether to accept the
     Exchange Offer; or
    
 
   
          (c) any law, statute, rule or regulation is proposed, adopted or
     enacted, which, in the sole judgment of the Company, might materially
     impair the ability of the Company to proceed with the Exchange Offer or
     materially impair the contemplated benefits of the Exchange Offer to the
     Company or might be material to Holders in deciding whether to accept the
     Exchange Offer; or
    
 
   
          (d) any governmental approval has not been obtained, which approval
     the Company shall, in its sole discretion, deem necessary for the
     consummation of the Exchange Offer as contemplated hereby; or
    
 
   
          (e) any of the following has occurred: (i) any general suspension of
     or limitation on trading in securities on the New York Stock Exchange or in
     the over-the-counter market (whether or not mandatory); (ii) any material
     impairment in the general trading market for debt securities; (iii) a
     declaration of a banking moratorium or any suspension of payments in
     respect of banks by federal or state authorities in the United States
     (whether or not mandatory); (iv) a commencement of a war, armed hostilities
     or other national or international crisis directly or indirectly relating
     to the United States; (v) any limitation (whether or not mandatory) by any
     governmental authority on, or other event having a reasonable likelihood of
     affecting, the extension of credit by banks or other lending institutions
     in the United States; (vi) any material adverse change in the United States
     securities or financial markets generally; or (vii) in the case of any of
     the foregoing existing at the time of commencement of the Exchange Offer, a
     material acceleration or worsening thereof; or
    
 
   
          (f) the Trustee has objected in any respect to, or taken any action
     that could, in the sole judgment of the Company, adversely affect the
     consummation of, the Exchange Offer or has taken any action that challenges
     the validity or effectiveness of the procedures used by the Company in
     making or completing the Exchange Offer.
    
 
     If the Company determines in its sole and absolute discretion that any of
the conditions are not satisfied, the Company may (i) refuse to accept any
Private Notes and return all tendered Private Notes to the tendering Holders,
(ii) extend the Exchange Offer and retain all Private Notes tendered prior to
the expiration of the Exchange Offer, subject, however, to the rights of Holders
to withdraw such Private Notes (see "-- Withdrawal of Tenders" above) or (iii)
waive such unsatisfied conditions with respect to the Exchange Offer and accept
all properly tendered Private Notes which have not been withdrawn. If such
waiver constitutes a material change to the Exchange Offer, the Company will
promptly disclose such waiver by means of a prospectus supplement that will be
distributed to the registered Holders, and the Company will
 
                                       35
<PAGE>   37
 
extend the Exchange Offer for a period of five to ten business days, depending
upon the significance of the waiver and the manner of disclosure to the
registered Holders, if the Exchange Offer would otherwise expire during such
five to ten business day period.
 
   
     The Exchange Offer is not conditioned upon any minimum aggregate principal
amount of Private Notes being tendered for exchange.
    
 
EXCHANGE AGENT
 
     The Bank of New York has been appointed as Exchange Agent for the Exchange
Offer. Questions and requests for assistance, requests for additional copies of
this Prospectus or of the Letter of Transmittal and requests for Notices of
Guaranteed Delivery should be directed to the Exchange Agent addressed as
follows:
 
<TABLE>
<S>                              <C>                              <C>
 By Registered or Certified       (For Eligible Institutions       By Hand/Overnight Delivery:
            Mail:                            Only)                    The Bank of New York
    The Bank of New York                 By Facsimile:                One Wall Street -- 27
    One Wall Street -- 27            The Bank of New York           Corporate Trust & Agency
  New York, New York 10286              (212) 571-3080                   Services Window
Attn: Reorganization Section         Confirm by telephone:                Ground Level
                                        (212) 815-2742              New York, New York 10286
                                                                  Attn: Reorganization Section
</TABLE>
 
FEES AND EXPENSES
 
     The expenses of soliciting tenders will be borne by the Company. The
principal solicitation is being made by mail; however, additional solicitations
may be made by telegraph, telephone or in person by officers and regular
employees of the Company and its affiliates.
 
     The Company has not retained any dealer-manager in connection with the
Exchange Offer and will not make any payments to brokers, dealers or others
soliciting acceptances of the Exchange Offer. The Company, however, will pay the
Exchange Agent reasonable and customary fees for its services and will reimburse
it for its reasonable out-of-pocket expenses in connection therewith.
 
     The cash expenses to be incurred in connection with the Exchange Offer will
be paid by the Company. Such expenses include fees and expenses of the Exchange
Agent and Trustee, accounting and legal fees and printing costs, among others.
The Company will pay all transfer taxes, if any, applicable to the exchange of
Private Notes pursuant to the Exchange Offer. If, however, certificates
representing Exchange Notes or Private Notes for principal amounts not tendered
or accepted for exchange are to be delivered to, or are to be issued in the name
of, any person other than the registered Holder of the Private Notes tendered,
or if tendered Private Notes are registered in the name of any person other than
the person signing the Letter of Transmittal, or if a transfer tax is imposed
for any reason other than the exchange of Private Notes pursuant to the Exchange
Offer, then the amount of any such transfer taxes (whether imposed on the
registered Holder or any other persons) will be payable by the tendering Holder.
If satisfactory evidence of payment of such taxes or exemption therefrom is not
submitted with the Letter of Transmittal, the amount of such transfer taxes will
be billed directly to such tendering Holder.
 
ACCOUNTING TREATMENT
 
     The Exchange Notes will be recorded at the same carrying value as the
Private Notes, which is face value less accrued original issue discount, as
reflected in the Company's accounting records on the date of the exchange.
Accordingly, no gain or loss for accounting purposes will be recognized. The
expenses of the Exchange Offer and the unamortized expenses related to the
issuance of the Private Notes will be amortized over the term of the Exchange
Notes.
 
                                       36
<PAGE>   38
 
OTHER
 
     Participation in the Exchange Offer is voluntary and holders of Private
Notes should carefully consider whether to accept the terms and conditions
thereof. Holders of the Private Notes are urged to consult their financial and
tax advisors in making their own decisions on what action to take with respect
to the Exchange Offer.
 
     As a result of the making of, and upon acceptance for exchange of all
validly tendered Private Notes pursuant to the terms of this Exchange Offer, the
Company will have fulfilled certain obligations under the terms of the Private
Notes and the Notes Registration Rights Agreement. Holders of the Private Notes
who do not tender their Private Notes in the Exchange Offer will continue to
hold such Private Notes and will be entitled to all the rights, and limitations
applicable thereto, under the Indenture, except for any such rights under the
Notes Registration Rights Agreement which by their terms terminate or cease to
have further effect as a result of the making of this Exchange Offer. All
untendered Private Notes will continue to be subject to the restrictions on
transfer set forth in the Indenture. To the extent that Private Notes are
tendered and accepted in the Exchange Offer, the trading market, if any, for any
remaining Private Notes could be adversely affected. See "Risk
Factors -- Consequences of Failure to Exchange."
 
                                       37
<PAGE>   39
 
                                USE OF PROCEEDS
 
   
     The Exchange Offer is intended to satisfy certain of the Company's
obligations under the Notes Registration Rights Agreement. The Company will not
receive any proceeds from the issuance of the Exchange Notes in the Exchange
Offer. Of the $264.8 million of net proceeds to the Company from the Private
Offering, approximately $19.0 million has been used to construct the DTI
network, $3.0 million was used to repay outstanding indebtedness of the Company
under a former bank credit facility and $1.0 million has been used to fund the
Company's operating expenses to date. The Company currently intends to use the
remaining net proceeds (i) to fund additional capital expenditures required for
the completion of the DTI network, (ii) to expand its management, operations and
sales infrastructure and (iii) for additional working capital and other general
corporate purposes. Pending such utilization, such net proceeds have been
invested in short-term, interest-bearing U.S. government securities and other
short-term, investment grade securities. See "Management's Discussion and
Analysis of Financial Condition and Results of Operations -- Liquidity and
Capital Resources."
    
 
                                 CAPITALIZATION
 
   
     The following table sets forth the actual cash, deferred revenues and
capitalization of the Company as of March 31, 1998. This table should be read in
conjunction with the "Selected Consolidated Financial Data" and the consolidated
financial statements and notes thereto included elsewhere in this Prospectus.
    
 
   
<TABLE>
<CAPTION>
                                                                  AS OF
                                                              MARCH 31, 1998
                                                              --------------
<S>                                                           <C>
Cash and cash equivalents...................................   $263,231,384
                                                               ============
Deferred revenues(a)........................................   $ 14,037,528
                                                               ============
Senior Discount Notes(b)....................................   $268,856,985
                                                               ============
Stockholders' equity:
  Preferred Stock, $0.01 par value, 20,000 shares
     authorized, no shares issued and outstanding...........             --
  Convertible Series A Preferred Stock, $0.01 par value,
     30,000 authorized, issued and outstanding..............            300
  Common Stock, $0.01 par value, 100,000,000 shares
     authorized, 30,000,000 issued and outstanding(c).......        300,000
  Additional paid-in capital................................     44,013,063
  Common Stock warrants(c)..................................     10,421,336
  Accumulated deficit.......................................     (6,198,351)
                                                               ------------
  Total stockholders' equity................................     48,536,348
                                                               ------------
Total capitalization........................................   $317,393,333
                                                               ============
</TABLE>
    
 
- -------------------------
   
(a) Reflects payments received by DTI in advance of the provision of
    telecommunications services under dark fiber leases (and wholesale network
    capacity agreements), which payments are recognized over the terms of the
    leases (or agreements) on a straight-line basis. Does not include current
    portion of deferred revenues in the amount of approximately $366,000.
    
 
   
(b) Of the $275.2 million gross proceeds from the issuance of the Units in the
    Private Offering, $265.3 million was allocated to the initial Accreted Value
    of the Notes and $10.0 million was allocated to the Warrants. No assurance
    can be given that the value allocated to the Warrants will be indicative of
    the price at which the Warrants may actually trade.
    
 
   
(c) As of the date of this Prospectus, Common Stock outstanding excludes (i)
    303,030 shares of Common Stock issuable upon exercise of an outstanding
    warrant and (ii) 725,000 shares of Common Stock issuable upon exercise of
    options that the Company has granted or is obligated to grant to certain of
    its directors and employees under the Company's 1997 Long-Term Incentive
    Award Plan. See "Management -- Incentive Award Plan," Notes 6 and 13 of the
    notes to the audited consolidated financial statements and Note 5 of the
    notes to the unaudited consolidated financial statements.
    
 
                                       38
<PAGE>   40
 
               SELECTED CONSOLIDATED FINANCIAL AND OPERATING DATA
 
   
     The selected consolidated financial data presented below for each of the
three years in the period ended June 30, 1997 have been derived from the audited
consolidated financial statements of the Company which have been audited by
Deloitte & Touche LLP, independent auditors. The selected consolidated financial
data as of and for the years ended June 30, 1993 and 1994 and as of and for the
nine-month periods ended March 31, 1997 and 1998 have been derived from the
unaudited consolidated financial statements of the Company, which have been
prepared on the same basis as the audited consolidated financial statements of
the Company and, in the opinion of management, reflect all normal recurring
adjustments necessary for a fair presentation of the financial position and
results of operations as of the end of and for such periods. The results for the
nine months ended March 31, 1998 are not necessarily indicative of the operating
results to be expected for the entire year. The information set forth below
should be read in conjunction with the discussion under "Management's Discussion
and Analysis of Financial Condition and Results of Operations" and "Business"
and the audited and unaudited consolidated financial statements of the Company
and notes thereto appearing elsewhere in the Private Offering Memorandum.
    
 
   
<TABLE>
<CAPTION>
                                                                                                              NINE MONTHS
                                                  FISCAL YEAR ENDED JUNE 30,                                ENDED MARCH 31,
                            -----------------------------------------------------------------------   ---------------------------
                              1993(A)        1994(A)        1995(A)        1996(A)         1997           1997           1998
                              -------        -------        -------        -------         ----           ----           ----
<S>                         <C>            <C>            <C>            <C>           <C>            <C>            <C>
OPERATING STATEMENT DATA:
 Revenues:
   Telecommunication
     services
     Carrier's carrier
       services............   $     --       $     --     $         --   $   188,424   $    807,347   $    488,931   $  1,707,914
     End-user services.....         --         35,463          199,537       488,377        515,637        380,914        414,660
   Other services(b).......         --             --               --            --        711,006             --             --
                              --------       --------     ------------   -----------   ------------   ------------   ------------
     Total revenue.........         --         35,463          199,537       676,801      2,033,990        869,845      2,122,574
                              --------       --------     ------------   -----------   ------------   ------------   ------------
 Operating expenses:
   Telecommunication
     services..............         --             --          165,723       296,912        847,190        563,791      1,024,578
   Other services(b).......         --             --               --            --        364,495             --             --
   Selling, general and
     administrative........         --         15,781          240,530       548,613      1,118,809        845,684      2,437,825
   Depreciation and
     amortization..........         --             --           70,500       425,841        757,173        521,049      1,385,750
                              --------       --------     ------------   -----------   ------------   ------------   ------------
     Total operating
       expenses............         --         15,781          476,753     1,271,366      3,087,667      1,930,524      4,848,153
                              --------       --------     ------------   -----------   ------------   ------------   ------------
 Income (loss) from
   operations..............         --         19,682         (277,216)     (594,565)    (1,053,677)    (1,060,679)    (2,725,579)
 Interest income (expense),
   net.....................         --           (588)          (9,516)     (191,810)       (51,023)       (94,534)    (2,138,707)
 Loan commitment fees......         --             --               --            --       (784,500)      (784,500)            --
 Equity in earnings of
   joint venture...........         --             --               --            --         37,436         37,436             --
                              --------       --------     ------------   -----------   ------------   ------------   ------------
 Income (loss) before
   income tax benefit......         --         19,094         (286,732)     (786,375)    (1,851,764)    (1,902,277)    (4,864,286)
 Income tax benefit........         --             --               --            --      1,214,331      1,042,000      2,020,000
                              --------       --------     ------------   -----------   ------------   ------------   ------------
 Net income (loss)(c)......   $     --       $ 19,094     $   (286,732)  $  (786,375)  $   (637,433)  $   (860,277)  $ (2,844,286)
                              ========       ========     ============   ===========   ============   ============   ============
</TABLE>
    
 
   
<TABLE>
<CAPTION>
                                                        AS OF JUNE 30,                                      AS OF MARCH 31,
                            -----------------------------------------------------------------------   ---------------------------
                              1993(A)        1994(A)        1995(A)        1996(A)         1997                  1998
                              -------        -------        -------        -------         ----                  ----
                            (UNAUDITED)    (UNAUDITED)
<S>                         <C>            <C>            <C>            <C>           <C>            <C>            <C>
BALANCE SHEET DATA:
 Cash and cash
   equivalents.............   $     --       $ 10,512     $    140,220   $   817,391   $  4,366,906          $263,231,384
 Network and equipment,
   net.....................         --         39,032        6,788,582    13,064,169     34,000,634           60,824,950
 Total assets..............      1,000         57,844       11,983,497    15,025,758     39,849,136           338,467,861
 Long-term debt............         --             --               --            --             --           268,856,985
 Deferred revenues(d)......         --         37,750        4,927,228     6,595,948      9,420,224           14,037,528
 Redeemable Convertible
   Series A Preferred
   Stock(e)................         --             --               --            --     28,889,165               --
 Stockholders' equity
   (deficit)(e)............         --         19,094         (237,638)   (1,100,703)    (4,729,867)          48,536,348
</TABLE>
    
 
   
<TABLE>
<CAPTION>
                                                                                                              NINE MONTHS
                                                  FISCAL YEAR ENDED JUNE 30,                                ENDED MARCH 31,
                            -----------------------------------------------------------------------   ---------------------------
                              1993(A)        1994(A)        1995(A)        1996(A)         1997           1997           1998
                              -------        -------        -------        -------         ----           ----           ----
                            (UNAUDITED)    (UNAUDITED)
<S>                         <C>            <C>            <C>            <C>           <C>            <C>            <C>
OTHER FINANCIAL DATA:
 Cash flows from
   operations..............   $  1,000       $ 49,544     $  6,903,884   $   299,710   $  7,674,272   $  4,694,799   $  5,097,421
 Cash flows from investing
   activities..............         --        (39,032)     (11,804,176)   (1,122,569)   (19,417,073)   (10,058,794)   (28,210,066)
 Cash flows from financing
   activities..............         --             --        5,030,000     1,500,030     15,292,316     10,314,313    281,977,123
 EBITDA(f).................         --         19,682         (206,716)     (168,724)      (259,068)      (502,194)    (1,339,829)
 Capital expenditures......         --         39,032        6,804,176     5,663,047     19,876,595     10,518,316     28,210,061
 Ratio of earnings to fixed
   charges(g)..............         --           33:1               --            --             --             --             --
</TABLE>
    
 
                                       39
<PAGE>   41
 
   
<TABLE>
<CAPTION>
                                                                                 AS OF
                                                    ---------------------------------------------------------------
                                                    MARCH 31,   JUNE 30,   SEPTEMBER 30,   DECEMBER 31,   MARCH 31,
                                                      1997        1997         1997            1997         1998
                                                    ---------   --------   -------------   ------------   ---------
<S>                                                 <C>         <C>        <C>             <C>            <C>
OTHER OPERATING DATA:
  Route miles.....................................      520         732        1,361           1,427        1,538
  Fiber miles.....................................   33,269      44,071       84,254          87,498       93,006
  POP/Collocation sites(h)........................       19          24           43              45           45
</TABLE>
    
 
- ---------------
 
   
(a) From its inception in June 1989 through June 30, 1993, the Company had no
    significant operations, assets or liabilities and consisted of nominal
    organizational activities. In addition, through June 30, 1996, the Company
    was considered a development stage enterprise focused on developing the DTI
    network and customer base.
    
 
(b) Other services revenues and expenses in the year ended June 30, 1997 reflect
    the design, construction and installation of innerduct for another carrier's
    fiber optic network.
 
   
(c) Net loss attributable to Common Stock, loss per share data and weighted
    average number of shares outstanding are not meaningful as there was only
    one common shareholder and no class of securities was registered.
    
 
   
(d) Does not include current portion of deferred revenues in the amount of
    approximately $101,000, $139,000, $260,000 and $366,000 as of June 30, 1995,
    1996 and 1997 and March 31, 1998.
    
 
   
(e) On February 13, 1998, in conjunction with the Private Offering, the Company
    amended the terms of the Series A Preferred Stock to provide that it is no
    longer mandatorily redeemable, and, as a result, the Series A Preferred
    Stock will be classified with stockholders' equity. See "Capitalization."
    
 
   
(f) EBITDA represents net loss before interest income (expense), loan commitment
    fees, income tax benefit, depreciation and amortization. EBITDA is included
    because the Company understands that such information is commonly used by
    investors in the telecommunications industry as an additional basis on which
    to evaluate the Company's ability to pay interest, repay debt and make
    capital expenditures. Excluded from EBITDA are interest income (expense),
    loan commitment fees, income taxes, depreciation and amortization, each of
    which can significantly affect the Company's results of operations and
    liquidity and should be considered in evaluating the Company's financial
    performance. EBITDA is not intended to represent, and should not be
    considered more meaningful than, or an alternative to, measures of operating
    performance determined in accordance with generally accepted accounting
    principles ("GAAP"). Additionally, EBITDA should not be used as a comparison
    between companies, as it may not be calculated in a similar manner by all
    companies.
    
 
   
(g) For purposes of calculating the ratio of earnings to fixed charges: (i)
    earnings consist of loss before income tax benefit, plus fixed charges
    excluding capitalized interest; and (ii) fixed charges consist of interest
    expenses and capitalized costs, amortization of deferred financing costs,
    plus the portion of rentals considered to be representative of the interest
    factor (one-third of lease payments). For the ended June 30, 1995, 1996 and
    1997, and for the nine months ended March 31, 1997 and 1998, the Company's
    earnings were insufficient to cover fixed charges by approximately $296,000,
    $2.0 million, $2.4 million, $2.5 million and $4.9 million, respectively.
    
 
   
(h) Consists of interconnections with ILEC access tandems, ILEC central offices,
    IXC POPs, and DTI's network control center and POP buildings.
    
   
    
 
                                       40
<PAGE>   42
 
               MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL
                      CONDITION AND RESULTS OF OPERATIONS
 
     The following discussion and analysis should be read in conjunction with
the Company's consolidated financial statements and the notes thereto and the
other financial data appearing elsewhere in this Prospectus.
 
OVERVIEW
 
     DTI is a facilities-based provider of long-haul and local
telecommunications services primarily to IXCs and other communications entities
on a wholesale basis, as well as directly to business and governmental end
users. DTI intends to expand its network outward from Missouri into an
additional 13 states in the Midwest region. The Company is preparing to offer
local switched services and data transmission services to targeted end-user
customers in Missouri in mid-1998. DTI intends to provide local switched service
capacity to its carrier's carrier customers on a wholesale basis as it deploys
its switches throughout its network.
 
   
     DTI was incorporated in June 1989. Until 1994, the Company was a
development stage enterprise engaged primarily in developing its business plan,
planning its activities, and bidding for and negotiating the following
agreements with St. John's Hospital in St. Louis, Missouri ("St. John's"), MHTC
and Union Electric. Pursuant to a February 1994 agreement with St. John's, DTI
commenced construction of a fiber optic network to provide data communications
services between St. John's facilities within the St. Louis area. The Company
subsequently established its network control center in suburban St. Louis, which
was then interconnected with the St. John's routes. Following the execution of
agreements with the MHTC in September 1994 and with Union Electric in October
1994, DTI began construction of a long-haul route between St. Louis and
Jefferson City, Missouri. This long-haul route and its local portions enabled
DTI to begin providing long-haul and local carrier's carrier services in 1996 to
certain IXCs, including MCI and WorldCom. During fiscal 1995 and 1996, DTI
continued construction of its network, primarily along the Missouri highway
system to Kansas City and other Missouri locations. DTI also entered into
agreements with St. Louis metropolitan municipalities and other secondary
Missouri cities to obtain rights-of-way and construct local loops in such areas.
In July 1996, pursuant to its joint venture agreement with KLT, a subsidiary of
KCPL, DTI commenced construction of a fiber optic network in the Kansas City
metropolitan area. In June 1997, DTI obtained rights-of-way for the construction
of its network facilities along certain Arkansas highways, which will facilitate
the Company's first network expansion outside the state of Missouri.
    
 
   
     REVENUES. The Company derives revenues principally from (i) the sale of
wholesale telecommunications services, primarily through dark fiber leases and
wholesale network capacity agreements, to IXCs, such as the Tier 1 carriers, and
other telecommunications entities and (ii) the sale of telecommunications
services directly to business and governmental end users. For the year ended
June 30, 1997, the Company derived approximately 40% and 25% of its total
revenues from carrier's carrier services and end-user services, respectively.
The remaining 35% of its total revenues in fiscal 1997 were derived from
non-recurring network construction services, which involved the design,
construction and installation of innerduct for the fiber optic network of one of
DTI's carrier customers. Excluding such network construction revenues, carrier's
carrier services and end-user services represented approximately 61% and 39%,
respectively, of the Company's total revenues in fiscal 1997. For the nine
months ended March 31, 1998, DTI derived approximately 80% and 20% of its total
revenues from carrier's carrier services and end-user services, respectively.
    
 
     During the past several years, market prices for many telecommunications
services have been declining, which is a trend the Company believes will likely
continue. This decline has had and will continue to have a negative effect on
the Company's gross margin, which may not be offset by decreases in the
Company's cost of services. However, the Company believes that such decreases in
prices may be partially offset by increased demand for DTI's telecommunications
services as it expands the DTI network and introduces new services. See
"Industry Overview," "Business -- Business Strategy" and "-- Products and
Services."
 
     Carrier's carrier services are generally high capacity, private line
telecommunications services provided over the Company's owned facilities and, in
locations where the DTI network has not been extended or completed, over leased
line capacity. Carrier's carrier services generally are provided to (i)
facilities-based carriers that require long distance transmission capacity where
they have geographic gaps in their facilities,
                                       41
<PAGE>   43
 
   
need additional capacity or require alternative routing and (ii)
non-facilities-based carriers requiring long haul transmission capacity.
Carrier's carrier is a wholesale business characterized by higher net margins
than are typically realized through end-user services primarily because
carrier's carrier services can be established more quickly and at a lower
marketing cost than end-user services.
    
 
   
     DTI derives carrier's carrier services revenues from IRUs and wholesale
network capacity agreements. IRUs typically have a term of 10 to 20 years. The
Company provides wholesale network capacity services through service agreements
for terms of one year or longer which typically require customers to pay for
such capacity regardless of level of usage. Both IRUs and wholesale network
capacity agreements generally provide for a fixed monthly payment based on the
capacity and length of circuit provided and frequently require substantial
advance payments. Such advance payments are recorded by the Company as deferred
revenue and are recognized as revenue over the life of the lease or agreement on
a straight-line basis. For the year ended June 30, 1997 and the nine months
ended March 31, 1998, the Company's three largest carrier customers accounted
for an aggregate of 70% and 66%, respectively, of carrier's carrier services
revenues, or 28% and 53%, respectively, of total revenues.
    
 
   
     End-user services are telecommunications services provided directly to
businesses and governmental end users. The Company currently provides private
line services to end users to connect certain points on an end user's private
telecommunications network as well as to bypass the applicable ILEC in accessing
such end user's long distance provider. DTI end-user services agreements
generally provide for services for a term of one year or longer and for a fixed
monthly payment based on the capacity and length of circuit provided, regardless
of level of usage. As of March 31, 1998, the Company has received aggregate
advance payments of approximately $15.1 million from certain of its end-user
customers. Revenues from end-user services and carrier's carrier services are
recognized monthly as the services are provided, except with respect to advance
payments, for which revenues are deferred and recognized over the life of the
agreement. Upon expiration, such agreements may be renewed or services may be
provided on a month-to-month basis. For the year ended June 30, 1997 and the
nine months ended March 31, 1998, five customers accounted for all of DTI's
end-user services revenue, or an aggregate of 25.3% and 43.8%, respectively, of
total revenues.
    
 
   
     By the end of 1998, the Company plans to offer, through the addition of
high-capacity switches on the DTI network, local switched services to certain
end-user customers. Switched services are expected to be billed to customers
primarily on a minutes-of-use basis. As a provider of local switched services,
the Company would also receive subscriber-paid line access charges, IXC-paid
per-minute access charges for completing IXC connections to end users on the DTI
network, and LEC-paid access charges for terminating LEC local calls to end
users on the DTI network. The Company completed installation of the first of its
Nortel DMS-500 switches in January 1998. Competitive, regulatory and
technological developments in the telecommunications industry may have a
significant effect on the Company's ability to compete in the local switched
services market. See "Risk Factors -- Competition" and "Business --
Competition." Further, the Company believes revenues from local switched
services customers that are billed on a minutes-of-use basis have the potential
to fluctuate significantly based on factors beyond DTI's control, including the
prices charged by its competitors. There can be no assurance that the Company
will have the ability or the necessary resources to successfully develop and
offer local switched services or that such services will achieve market
acceptance or profitability.
    
 
     In fiscal 1997, at the request of a specific carrier customer, the Company
designed, constructed and installed innerduct for such customer's own fiber
optic network. While the Company does not presently consider the provision of
such services to be part of its business strategy, it will consider such
opportunities as they arise. The Company expects that future revenues, if any,
from network construction services will not be a significant contributor to the
Company's overall revenues or results of operations.
 
     OPERATING EXPENSES. The Company's principal operating expenses consist of
the cost of telecommunications services, selling, general and administrative
("SG&A") expenses, depreciation and amortization, and, in fiscal 1997, costs of
network construction services.
 
     The cost of telecommunications services consists primarily of the cost of
leased line facilities and capacity, and engineering and operating costs in
connection with its owned facilities. Because the Company currently provides
carrier's carrier and end-user services principally over its own network, the
cost of providing
                                       42
<PAGE>   44
 
   
these services includes a minor amount of leased space (in the form of physical
collocation at ILEC access tandems and IXC POPs) and leased line capacity (to
fill requirements of a customer contract which are otherwise substantially met
on the DTI network and typically where the Company plans to expand the DTI
network) and no ILEC access charges. However, when the Company begins providing
local switched services, leased line capacity costs and access charges are
expected to increase significantly because the Company expects to obtain access
to a greater number of ILEC facilities through leased lines in order to reach
end users that cannot be cost-effectively connected to the DTI network in a
given local market. The Company expects that the addition of local switched
services will have a negative impact on its overall net margin due to the fact
that the net margin of local switched services is generally lower than that of
carrier's carrier services. Engineering and operating costs include, but are not
limited to, costs of designing the DTI network, ordering, testing and installing
fiber optic cable and electronic equipment, and locating installed fiber to
minimize the risk of fiber cuts.
    
 
   
     SG&A expenses include the cost of salaries, benefits, occupancy costs,
sales and marketing expenses and administrative expenses. Selling expenses
include commissions for the Company's sales programs, which consist of a
percentage of a customer's initial billing, plus a residual percentage of
ongoing monthly revenues. The Company plans to add sales offices in selected
markets as additional segments of the DTI network become operational. The
Company began developing a sales staff late in fiscal 1997 to concentrate on
sales to end-user customers. However, DTI does not expect to begin to realize
the results of its increased sales efforts until fiscal 1999. Depreciation and
amortization are primarily related to fiber optic cable plant, electronic
terminal equipment and network buildings, and are expected to increase as the
Company incurs substantial capital expenditures to build and acquire the
components of the DTI network and begins to install its own switches. In
general, SG&A expenses have increased significantly as the Company has developed
and expanded the DTI network. The Company expects to incur significant increases
in SG&A expenses to realize the anticipated growth in revenue for carrier's
carrier services and end-user services. In addition, SG&A expenses will increase
as the Company continues to recruit experienced personnel to implement the
Company's business strategy. See "Risk Factors -- Expansion and Managing Rapid
Growth" and "Business -- Sales and Marketing."
    
 
   
     OPERATING LOSSES. As a result of development and operating expenses, the
Company has incurred significant operating and net losses to date. Losses from
operations in fiscal 1995, 1996 and 1997 and for the nine months ended March 31,
1998 were $277,000, $595,000, $1.1 million and $2.7 million, respectively. DTI
expects to incur significant and possibly increasing operating losses and to
generate negative net cash flows after capital expenditures during at least the
next two years of the Company's expansion of the DTI network. There can be no
assurance that the Company will achieve or sustain profitability or generate
sufficient positive cash flow to meet its debt service obligations and working
capital requirements. If the Company cannot achieve operating profitability or
positive cash flows from operating activities, it may not be able to service the
Notes or to meet its other debt service or working capital requirements, which
could have a material adverse effect on the Company.
    
 
                                       43
<PAGE>   45
 
RESULTS OF OPERATIONS
 
     The table set forth below summarizes the Company's percentage of revenue by
source and operating expenses as a percentage of total revenues:
 
   
<TABLE>
<CAPTION>
                                                                                          NINE MONTHS
                                                    FISCAL YEAR ENDED JUNE 30,          ENDED MARCH 31,
                                                   -----------------------------       -----------------
                                                   1995        1996        1997        1997        1998
                                                   ----        ----        ----        ----        ----
<S>                                                <C>         <C>         <C>         <C>         <C>
Revenue:
  Carrier's carrier services.....................     --%       27.8%       39.7%       56.2%       80.5%
  End-user services..............................  100.0        72.2        25.3        43.8        19.5
                                                   -----       -----       -----       -----       -----
                                                   100.0       100.0        65.0       100.0       100.0
  Other services.................................     --          --        35.0          --          --
                                                   -----       -----       -----       -----       -----
     Total revenue...............................  100.0%      100.0%      100.0%      100.0%      100.0%
                                                   =====       =====       =====       =====       =====
Operating Expenses:
  Telecommunications services....................   83.1%       43.9%       41.7%       64.8%       48.3%
  Other services.................................     --          --        17.9          --          --
  Selling, general and administrative............  120.5        81.0        55.0        97.2       114.9
  Depreciation and amortization..................   35.3        62.9        37.2        59.9        65.3
                                                   -----       -----       -----       -----       -----
     Total operating expenses....................  238.9%      187.8%      151.8%      221.9%      228.5%
                                                   =====       =====       =====       =====       =====
</TABLE>
    
 
   
     REVENUE. Total revenue increased 144.0% from $870,000 in 1997 to $2.1
million in 1998 due to increased revenue from carrier's carrier and end-user
services. Revenue from carrier's carrier services increased 249.3%, from
$489,000 in 1997 to $1.7 million in 1998. This increase resulted principally
from the completion of additional network segments, as well as from adding
traffic on the existing DTI network. End-user revenues increased 8.9% from
$381,000 in 1997 to $415,000 in 1998. This increase was attributable to the
completion and activation of additional sites under a deferred revenue contract,
which caused additional deferred revenues to be recognized.
    
 
   
     OPERATING EXPENSES. Operating expenses increased 151.1% from $1.9 million
in 1997 to $4.8 million in 1998, due primarily to increases in
telecommunications services, selling, general and administrative expenses and
depreciation and amortization. Telecommunications services expenses increased
81.7% from $564,000 in 1997 to $1.0 million in 1998 due to increased personnel
to support the expansion of the DTI network, as well as increased costs related
to property taxes and other costs in connection with leasing capacity to support
customers in areas not yet reached by the DTI network. Selling, general and
administrative expenses increased 188.3%, from $846,000 in 1997 to $2.4 million
in 1998, in order to support the expansion of the DTI network, which includes an
increase in administrative and sales personnel and the related expenses of
supporting these personnel, as well as increased legal fees. Depreciation and
amortization increased 166.0%, from $521,000 in 1997 to $1.4 million in 1998 due
to higher amounts of plant and equipment being in service in 1998 versus 1997.
The Company expects that significant additional amounts of plant and equipment
will be placed in service throughout fiscal 1998 and fiscal 1999. As a result,
depreciation and amortization is expected to increase significantly.
    
 
   
     INTEREST AND OTHER INCOME (EXPENSE). Net interest and other income
(expense) increased from a net expense of $842,000 in 1997 to net expense of
$2.1 million in 1998. Interest income increased from $58,000 in 1997 to $1.6
million in 1998 due to the investment of the proceeds from the Senior Discount
Notes. Similarly, as a result of the Private Offering, interest expense
increased from $153,000 in 1997 to $3.7 million in 1998. Loan commitment fees
decreased from $785,000 in 1997 to $-0- in 1998. These fees represented a
one-time charge for a loan commitment which was not used.
    
 
   
     INCOME TAXES. An income tax benefit of $2,020,000 and $1,042,000 was
recorded in the nine month periods ended March 31, 1998 and 1997, respectively,
as management believes it is more likely than not that the Company will generate
taxable income sufficient to realize the tax benefit associated with future
deductible temporary differences and net operating loss carryforwards prior to
their expiration.
    
 
                                       44
<PAGE>   46
 
   
     NET LOSS. Net loss for the nine months ended March 31, 1998 was $2.8
million compared to $860,000 for the nine months ended March 31, 1997.
    
 
FISCAL YEAR ENDED JUNE 30, 1996 COMPARED TO FISCAL YEAR ENDED JUNE 30, 1997
 
     REVENUE. Revenue increased 200.5%, from $677,000 in 1996 to $2.0 million in
1997. This increase was due primarily to increased revenue from both carrier's
carrier services and end-user services, as well as significant income from other
services. Revenue from carrier's carrier services increased 328.5%, from
$188,000 in 1996 to $807,000 in 1997. This increase resulted principally from
completion and activation of additional route miles of the DTI network, which
allowed the Company to sell both lighted and dark fiber capacity to several
IXCs. End-user services revenue increased 5.6%, from $488,000 in 1996 to
$516,000 in 1997. Other services revenue of $711,000 in fiscal 1997 represented
a single contract for installation of innerduct for one of the Company's carrier
customers along the Company's right-of-way. The Company recorded $0 in other
service revenues in fiscal 1996, and other services are not expected to be a
recurring source of revenue for the Company in the future. However, the Company
will consider similar opportunities, should they become available in the future,
principally as a means of lowering the cost of expanding its network.
 
     OPERATING EXPENSES. Operating expenses increased 142.9%, from $1.3 million
in 1996 to $3.1 million in 1997, due primarily to increases in
telecommunications services expenses, SG&A expenses, other services expenses,
and depreciation and amortization. Telecommunications services expenses
increased 185.3%, from $297,000 in 1996 to $847,000 in 1997 due to the expansion
of the network and increased revenues from carrier's carrier services. SG&A
expenses increased 103.9%, from $549,000 in 1996 to $1.1 million in 1997 to
support the Company's expansion. Other services expenses of $364,000 in 1997
represent the costs associated with a contract for the installation of innerduct
for one of the Company's carrier customers.
 
     Depreciation and amortization increased 77.8%, from $426,000 in 1996 to
$757,000 in 1997 primarily due to additional plant and equipment being placed
into service. As of June 30, 1997, the Company had gross plant and equipment of
$35.2 million, of which $19.0 million (54%) consisted of construction in
progress that was not subject to depreciation. A substantial portion of this
construction in progress is expected to be placed in service in fiscal 1998. In
addition, the Company plans to construct and place in service significantly
greater amounts of plant and equipment in fiscal 1998 than in prior years. As a
result, depreciation and amortization expense is expected to increase
significantly.
 
     INTEREST AND OTHER INCOME (EXPENSE). Net interest and other expenses
increased $606,000, from $192,000 in 1996 to $798,000 in 1997. This increase was
primarily attributable to loan commitment fees of $785,000 incurred in
connection with a bridge loan commitment made available to the Company but not
utilized as a result of KLT's investment in the Company. Interest income
decreased from $193,000 in 1996 to $102,000 in 1997 because the Company carried
smaller average cash balances. Interest expense decreased from $385,000 in 1996
to $153,000 in 1997, as the Company issued its Series A Preferred Stock to
finance, in part, its network construction. The Company reported equity in
earnings of a joint venture of $37,000 in 1997. This joint venture was formed
and its operations and assets were combined with the Company's during the year
ended June 30, 1997 in connection with the issuance of Series A Preferred Stock
to KLT.
 
     INCOME TAXES. The Company incurred $0 of income taxes from July 1, 1994
through June 30, 1997 as a result of generating net operating losses for tax
purposes. An income tax benefit of $1.2 million was recorded in fiscal 1997, as
the Company believes that it is more likely than not that it will generate
taxable income sufficient to realize the tax benefits associated with future
deductible temporary differences and net operating loss carryforwards prior to
their expiration. This belief is based primarily upon changes in operations over
the last year.
 
     NET LOSS. The Company's net loss decreased 18.9% from $786,000 in 1996 to
$637,000 in 1997.
 
                                       45
<PAGE>   47
 
FISCAL YEAR ENDED JUNE 30, 1995 COMPARED TO FISCAL YEAR ENDED JUNE 30, 1996
 
     REVENUE. Total revenue increased 239.2%, from $200,000 in 1995 to $677,000
in 1996, due primarily to increased revenue from both carrier's carrier services
and end-user services. Revenue from carrier's carrier services amounted to
$188,000 in 1996 as a result of the completion of additional route miles of the
DTI network, which allowed it to sell capacity to several IXCs. End user
services revenue increased 144.8%, from $200,000 in 1995 to $488,000 in 1996.
This increase was attributable to the expansion of the DTI network.
 
     OPERATING EXPENSES. Operating expenses increased 166.7%, from $477,000 in
1995 to $1.3 million in 1996 due primarily to increases in telecommunications
services expenses, SG&A expenses and depreciation and amortization.
Telecommunications services expenses increased 79.2%, from $166,000 in 1995 to
$297,000 in 1996 due to the expansion of the DTI network and increased levels of
revenue from telecommunications services. SG&A expenses increased 128.1%, from
$241,000 in 1995 to $549,000 in 1996 in order to support the Company's
expansion. Depreciation and amortization increased 504.0%, from $71,000 in 1995
to $426,000 in 1996 due to significant additional amounts of plant and equipment
being placed into service as part of the DTI network's expansion.
 
     INTEREST AND OTHER INCOME (EXPENSE). Net interest and other expenses
increased $182,000, from $10,000 in 1995 to $192,000 in 1996. This increase was
primarily attributable to interest expense incurred in connection with increased
levels of borrowing. Interest income increased 26.0%, from $153,000 in 1995 to
$193,000 in 1996 because the Company carried larger average cash balances.
Interest expense increased 136.4%, from $163,000 in 1995 to $385,000 in 1996 due
to higher average loan balances.
 
     INCOME TAXES. The Company incurred $0 of income taxes from July 1, 1994
through June 30, 1996 as a result of generating net operating losses for tax
purposes.
 
     NET LOSS. The Company's net loss increased 174.3%, from $287,000 in 1995 to
$786,000 in 1996.
 
LIQUIDITY AND CAPITAL RESOURCES
 
   
     The Company has funded its capital expenditures, working capital and debt
requirements and operating losses through a combination of advance payments for
future telecommunications services received from certain major customers,
private debt and equity financings and external borrowings. In addition to
utilizing the net proceeds of the Private Offering, DTI intends to finance its
capital expenditures, working capital requirements, operating losses and debt
service requirements through advance payments under existing and additional
agreements for IRUs or wholesale capacity, borrowings under bank credit
facilities, additional debt or equity financings, and available cash flow from
operations.
    
 
   
     The net cash provided by operating activities for the years ended June 30,
1996 and 1997 totaled $300,000 and $7.7 million, respectively, and for the nine
months ended March 31, 1997 and 1998, net cash provided by operating activities
totaled $4.7 million and $5.1 million, respectively. During the year ended June
30, 1997, cash provided by operating activities came principally from increases
in accounts payable of $3.4 million, deferred revenues of $2.9 million and other
liabilities of $1.5 million. The increase in accounts payable in fiscal 1997
reflects the increase in liabilities under DTI's supply contracts in connection
with the buildout of the DTI network. Deferred revenues in fiscal 1997
principally reflect advance payments received from carrier customers under
agreements for IRUs and wholesale network capacity. During the nine months ended
March 31, 1998, net cash provided by operating activities resulted principally
from an increase in taxes payable (other than income taxes) of $1.9 million and
an increase in deferred revenues of $4.7 million relating to an advance payment
received under wholesale network capacity agreements and end-user agreements. As
of March 31, 1998, advance payments of approximately $21.4 million will become
due over the next five years under existing agreements with certain major
customers upon DTI's meeting its obligations under certain agreements, which
require the Company to provide telecommunications services or dark fiber
capacity.
    
 
   
     In January 1998, Digital Teleport entered into a $30.0 million bank credit
facility (the "Credit Facility") with certain commercial lending institutions
and Toronto Dominion (Texas), Inc., as administrative agent for the lenders, to
fund its working capital requirements until consummation of the Private
Offering. Certain covenants under the Credit Facility required that all
outstanding borrowings be repaid upon the consummation of the Private Offering
and effectively precluded any additional borrowings under the Credit Facility
after such
    
 
                                       46
<PAGE>   48
 
   
amounts were so repaid. The Company has repaid all borrowings under and has
terminated the Credit Facility. The Company intends to pursue a long-term bank
credit facility to replace the Credit Facility.
    
 
   
     On February 23, 1998 the Company completed the issuance and sale of the
Private Notes, for which the Company received proceeds, net of underwriting
discounts and expenses, totaling approximately $264.8 million. Of the $264.8
million of net proceeds to the Company from the Private Offering, approximately
$19.0 million has been used to construct the DTI network, $3.0 million was used
to repay outstanding indebtedness of the Company under a former bank credit
facility and $1.0 million has been used to fund the Company's operating expenses
to date. The Company currently intends to use the remaining net proceeds (i) to
fund additional capital expenditures required for the expansion of the DTI
network, (ii) to expand its management, operations and sales infrastructure and
(iii) for additional working capital and other general corporate purposes. The
Company expects to incur significant operating losses, to generate negative net
cash flows after capital expenditures and to invest substantial funds to
construct the DTI network during the next several years while the Company
continues to develop and expand its telecommunications services and customer
base. Accordingly, if the Company cannot achieve operating profitability or
positive cash flows from operating activities, it may not be able to service the
Notes or to meet its other debt service or working capital requirements, which
would have a material adverse effect on the Company. See "Description of the
Notes -- Certain Covenants."
    
 
   
     At June 30, 1997 the Company had a working capital deficit of $1.7 million,
which represents an improvement of $4.8 million compared to the working capital
deficit of $6.5 million at June 30, 1996. This improvement is primarily
attributable to the receipt of cash payments from, and the retirement of
outstanding obligations to, KLT during fiscal 1997. See "Certain Relationships
and Related Transactions." The fiscal 1996 working capital deficit resulted
primarily from growth experienced by the Company and DTI's substantial
investment in network and equipment. At March 31, 1998, the Company had a
working capital surplus of $256.9 million, which primarily reflects the receipt
of cash proceeds from the Private Offering.
    
 
   
     The Company's investing activities used cash of $1.1 million for the year
ended June 30, 1996 and $19.4 million for the year ended June 30, 1997. During
the year ended June 30, 1997, the Company invested $19.9 million in network and
equipment and reduced restricted cash by $460,000 to repay borrowings under
DTI's former credit facility. During the year ended June 30, 1996, the Company
invested $5.7 million in network and equipment and reduced restricted cash by
$4.5 million to repay borrowings under the Company's former credit facility.
During the first nine months of fiscal 1998, the Company's investing activities
used cash of $28.2 million compared to $10.1 million for the first nine months
of fiscal 1997. During the first nine months of fiscal 1998 the Company invested
$28.2 million in network and equipment. During the first nine months of fiscal
1997 the Company invested $10.5 million in network and equipment and reduced
restricted cash by $460,000.
    
 
   
     Cash provided by financing activities was $1.5 million for the year ended
June 30, 1996 and $15.3 million for the year ended June 30, 1997. During the
year ended June 30, 1997, the Company borrowed $8.0 million under a loan
agreement with KLT, bringing the total borrowings under that agreement to $14.0
million. These total borrowings were converted into Series A Preferred Stock,
and additional cash proceeds in the amount of $10.5 million were received
pursuant to the KLT Agreement (as defined herein). Cash was used to make
principal payments on a bank loan of $500,000 and to repurchase common stock
warrants for $2.7 million granted to a customer (in connection with a bridge
financing provided by such customer to the Company, which bridge financing was
satisfied and terminated by the Company in April 1996). During the year ended
June 30, 1996, cash was provided by borrowings under notes payable in the amount
of $10.4 million and cash was used to repay notes payable in the amount of $8.9
million. During the first nine months of fiscal 1997 cash provided by financing
activities was $10.3 million compared to $282.0 million for the first nine
months of fiscal 1998. During the first three quarters of fiscal 1998, the
Company received $17.3 million in proceeds from the issuance of Series A
Preferred Stock to KLT and $275.2 million from the issuance and sale of the
Units in the Private Offering. During the first three quarters of fiscal 1997,
the Company borrowed $8.0 million under a loan agreement with KLT, bringing the
Company's total borrowings from KLT to $14.0 million. These borrowings were
subsequently converted to Series A Preferred Stock during the year ended June
30, 1997 and additional cash proceeds in the amount of $5.0 million were
received pursuant to a stock subscription
    
                                       47
<PAGE>   49
 
   
agreement. During the nine months ended March 31, 1999, cash was used to
repurchase common stock warrants granted to a customer in the amount of $2.7
million and to repay borrowings of $450,000 under a former bank credit facility,
which borrowings were collateralized by cash equivalents that were maintained at
the lender in the amount of such borrowings and that earned interest at the
lender's money market rate.
    
 
   
     To achieve its business plan, DTI will need significant financing to fund
its capital expenditure, working capital and debt service requirements and its
anticipated future operating losses. The Company estimates that total capital
expenditures necessary to complete the DTI network will be approximately $673.2
million. Of this amount, the Company had already expended approximately $62.8
million as of March 31, 1998. The Company anticipates remaining total capital
expenditures for the expansion of the DTI network of approximately $16.6 million
in the fourth quarter of fiscal 1998 and $410.1 million in fiscal 1999.
Estimated total expenditures for fiscal 1999 include existing commitments of
$7.2 million. The Company's estimated capital requirements primarily include the
estimated cost of (i) completing the construction and activation of the DTI
network throughout the Midwest region in accordance with its business strategy,
and (ii) network expansion activities, including the construction of additional
local loops in secondary and tertiary cities as network traffic volume
increases. The Company also may require additional capital in the future to fund
operating deficits and net losses and for potential strategic alliances, joint
ventures and acquisitions. These activities could require significant additional
capital not included in the foregoing estimated capital requirements.
    
 
   
     As of March 31, 1998, DTI had $263.2 million of cash and cash equivalents.
Such amount is expected to provide sufficient liquidity to meet the Company's
operating and capital requirements through approximately December 31, 1998.
Subsequent to such date, DTI's operating and capital requirements are expected
to be funded, in large part, out of additional debt or equity financings,
borrowings under bank credit facilities, advance payments under IRUs and
wholesale network capacity agreements, and available cash flow from operations.
The Company is in various stages of discussions with potential customers for
IRUs and wholesale network capacity agreements. There can be no assurance,
however, that the Company will continue to obtain advance payments from
customers prior to commencing construction, that it will be able to obtain
financing under any credit facility or that other sources of capital will be
available on a timely basis or on terms that are acceptable to the Company and
within the restrictions under the Company's existing financing arrangements, or
at all. If the Company fails to obtain the capital required to complete the DTI
network build-out, the Company could modify, defer or abandon building certain
portions of the DTI network. The failure of the Company, however, to raise the
substantial capital required to complete the DTI network construction could have
a material adverse effect on the Company. The actual amount and timing of DTI's
capital requirements may differ materially from those estimates depending on
demand for the Company's services, and the Company's ability to implement its
current business strategy as a result of regulatory, technological and
competitive developments (including market developments and new opportunities)
in the telecommunications industry. See "Risk Factors -- Substantial Capital
Requirements," "-- High Leverage; Ability to Service Indebtedness; Restrictive
Covenants," "-- Risks Related to Completing the DTI Network; Increasing Traffic
Volume" and "-- Competition."
    
 
   
     Subject to the Indenture provisions that limit restrictions on the ability
of any of the Company's Restricted Subsidiaries to pay dividends and make other
payments to the Company, future debt instruments of Digital Teleport may impose
significant restrictions that may affect, among other things, the ability of
Digital Teleport to pay dividends or make loans, advances or other distributions
to the Company. The ability of Digital Teleport to pay dividends and make other
distributions also will be subject to, among other things, applicable state laws
and regulations. There can be no assurance that Digital Teleport will be able to
pay, or will generate sufficient earnings or cash flow to distribute, any cash
dividends or make any loans, advances or other payments of funds to the Company,
the failure of which would have a material adverse effect on the Company's
ability to meet its obligations on the Exchange Notes. See "Risk Factors --
Holding Company Structure; Priority of Secured Debt" and "Description of the
Notes -- Certain Covenants -- Limitations on Dividends and Other Payment
Restrictions Affecting Restricted Subsidiaries." Further, there can be no
assurance that the Company will have available, or will be able to acquire from
alternative sources of
    
 
                                       48
<PAGE>   50
 
   
financing, funds sufficient to repurchase the Exchange Notes in the event of a
Change of Control. See "Description of the Notes -- Certain Covenants --
Purchase of Notes Upon a Change of Control."
    
 
   
     In February 1998, the Company received notice from a customer that it
intends to setoff against amounts payable to the Company of approximately
$75,000 as damages and penalties under the Company's contract with that customer
due to the failure by the Company to meet certain construction deadlines and
such customer reserved its rights to seek other remedies under the contract. The
Company believes that if such setoff were to be made, it would not be material
to the Company's business, financial position and results of operations.
    
 
INFLATION
 
     The Company does not believe that inflation has had a significant impact on
the Company's consolidated results of operations.
 
   
YEAR 2000
    
 
   
     While the Company believes that its existing systems and software
applications are Year 2000 compliant, there can be no assurance until the year
2000 that all of the Company's systems and software applications then in place
will function adequately. The failure of the Company's systems or software
applications to accommodate the year 2000 could have a material adverse effect
on its business, financial condition and results of operations and its ability
to meet its obligations on the Notes. Further, if the systems or software
applications of telecommunications equipment suppliers, ILECs, IXCs or others on
whose services or products the Company depends or with whom the Company's
systems must interface are not Year 2000 compliant, it could have a material
adverse effect on the Company's business, financial condition and results of
operations and its ability to meet its obligations on the Notes. The Company
intends to continue to monitor the performance of its accounting, information
and processing systems and software applications and those of its third-party
constituents to identify and resolve any Year 2000 issues. To the extent
necessary, the Company may need to replace, upgrade or reprogram certain systems
to ensure that all interfacing applications will be Year 2000 compliant when
operating jointly. Based on current information, the Company does not expect
that the costs of such replacements, upgrades and reprogramming will be material
to its business, financial condition or results of operations. Most major
domestic carriers have announced that they expect to achieve Year 2000
compliance for their networks and support systems by mid-1999; however, other
domestic and international carriers and other third-party constituents may not
be Year 2000 compliant, and failures on their networks and systems could
adversely affect the operation of the Company's networks and support systems and
have a material adverse effect on the Company's business, financial condition
and results of operations and its ability to meets its obligations on the Notes.
    
 
   
NEW ACCOUNTING STANDARDS
    
 
   
     In 1997, the Financial Accounting Standards Board issued Statement of
Financial Accounting Standards (SFAS) No. 130, "Reporting Comprehensive Income,"
and SFAS No. 131, "Disclosures About Segments of an Enterprise and Related
Information." These statements, which are effective for fiscal years beginning
after December 15, 1997, expand or modify disclosures and, the Company believes,
will have no impact on the Company's consolidated financial position, results of
operations or cash flows.
    
 
                                       49
<PAGE>   51
 
                               INDUSTRY OVERVIEW
 
GENERAL
 
     The Telecom Act and several state regulatory initiatives have substantially
increased the competitive nature of the telecommunications regulatory
environment in the United States. These developments have removed significant
legal barriers to entry by IXCs and other carriers into the local
telecommunications market and required the RBOCs to allow competing
telecommunications companies to connect their facilities with their network.
IXCs and other carriers have also been guaranteed access to and a right to
resell local telecommunications and network services on an unbundled basis. The
Telecom Act also has created the foundation for increased competition from ILECs
in the long distance telecommunications market. Due to these regulatory changes,
telecommunications companies are now permitted, upon regulatory approval, to
offer an array of interstate and intrastate telephone services, including long
distance and other private line services as well as local telephone service.
 
     The telecommunications market consists of long distance and local services.
Long distance services include retail and wholesale services. Retail long
distance services include traditional switched and dedicated long distance,
"800" and "888" calling, calling card and operator services, ATM, frame relay
and high capacity broadband private line services, as well as Internet, Intranet
and Web page hosting and development services. The dominant national retail long
distance providers include AT&T, Sprint, MCI and WorldCom (the "Tier 1
carriers") and a number of regional retail long distance service providers.
Wholesale long distance and local access service is known as the "carrier's
carrier" business. This business encompasses providing line capacity and
switched services over proprietary network facilities to the carrier's carrier
target market and interconnection within those markets. The primary customers
for companies in the carrier's carrier business are the Tier 1 carriers and the
RBOCs, followed by regional long distance carriers, ISPs, CLECs and other
telecommunications providers.
 
     Local services include switch-based and non-switch-based local exchange
services. Local service providers primarily consist of ILECs, which include the
RBOCs, and CLECs. CLECs can penetrate a local market by (i) reselling ILEC
services by entering into interconnection agreements with the ILECs with respect
to a particular target market or (ii) installing network infrastructure to
support local services in those markets.
 
LONG DISTANCE AND LOCAL CALL ROUTING
 
     A typical local telephone call placed by an end user is routed to a central
office, which is generally less than three miles from the end user, where the
call is switched. The call is then sent to an "access tandem" which connects
several central offices. The call is then transmitted to the access tandem
serving the central office of the call recipient, then to the central office
serving the call recipient and on to the call recipient. A typical long distance
call follows the same routing as a local call, from the caller to the caller's
central office and then to the access tandem. However, a long distance call is
transmitted from the caller's access tandem to the POP of the caller's long
distance carrier. The long distance carrier then transmits the call to its POP
at the call recipient's location, then to the access tandem and central office
serving the call recipient and on to the call recipient.
 
     The following diagram illustrates the general structure of an IXC long
distance network.
 
                        IXC Long Distance Network Chart
 
                                       50
<PAGE>   52
 
MARKET OPPORTUNITY
 
     The Company believes demand from IXCs and other communications entities and
from business and governmental end-users for advanced, high bandwidth voice,
data and video transmission capacity will increase over the next several years
due to regulatory and technological changes and other industry developments.
These anticipated changes and developments include: (i) continued growth in
demand for existing long distance and local exchange services, (ii) continued
growth in the capacity requirements of the Internet, data transmission and other
new technologies and applications, (iii) requirements of the Tier 1 carriers to
replace or augment portions of their older system and (iv) entry into long
distance and local exchange markets of new communications providers.
 
     BASE GROWTH OF EXISTING PROVIDERS. Toll service revenues of long distance
carriers in the U.S. were approximately $82 billion in 1996, according to the
FCC. Based on FCC data, toll service revenues of long distance carriers grew at
a compound annual rate of approximately 8.5% during the period 1991 through
1996, while the toll service revenues of all non-Tier 1 long distance carriers,
many of which lease network capacity from facilities-based carriers such as the
Company, grew in the aggregate at a compound annual rate of over 23% during the
same period. The revenue increases were achieved against a backdrop of declining
unit prices for most telecommunications services, which suggests that the demand
for telecommunications bandwidth has increased at an even higher rate. The
Company believes that these growth trends generally will continue and that
non-facilities-based companies will need to either invest in network facilities
or lease high bandwidth network capacity in order to remain competitive.
 
     According to the FCC, the 1996 aggregate revenues of all reporting LECs in
the U.S. approximated $101 billion. Based on FCC data, revenues of all reporting
LECs in the U.S. increased at a compound annual rate of approximately 3.3%
during the period 1991 through 1996. Until recently, there was virtually no
competition in local exchange markets. Several factors have served to promote
recent competition in the local market, including: (i) rapidly growing customer
demand for an alternative to the ILECs, spurred partly by the development of
competition in the long distance market; (ii) advances in the technology for
transmission of data and video, which require significant bandwidth capacity and
reliability; (iii) the development of fiber optics and digital electronic
technology, which reduced network construction costs while increasing
transmission speeds, bandwidth capacity and reliability as compared to
copper-based networks; (iv) the significant access charges IXCs are required to
pay to access the ILECs' networks; and (v) a willingness on the part of
legislators to enact, and regulators to enforce, legislation and regulations
permitting and promoting competition in the local exchange market. In
particular, the Telecom Act requires all major ILECs to "unbundle" their local
network offerings and allow other providers of telecommunications services to
interconnect with their facilities and equipment. Most significantly, ILECs are
required to complete local calls originated by a competitor's customers and
switched by the competitor and to deliver inbound local calls to the competitor
for termination to its customers, assuring customers of unimpaired local calling
capability.
 
     ACCOMMODATION OF THE INTERNET AND OTHER NEW APPLICATIONS. The Company
believes additional network transmission capacity and faster response times will
be required to accommodate multimedia (voice, data and video) and other
potential high-bandwidth applications, such as increasing use of the Internet by
commercial enterprises, the deployment of corporate intranets and the use of
telecommunications infrastructure for providing cable television and other
entertainment services. The Company believes this growth will result in
increased demand for high-bandwidth dedicated circuits and other data
communications services the Company plans to offer (such as Frame Relay and
ATM).
 
     AUGMENTATION OF OLDER SYSTEMS. Although AT&T, Sprint and MCI have begun to
upgrade their systems, the coast-to-coast fiber optic networks currently
operated by such carriers were constructed for the most part prior to 1990,
using asynchronous, non-SONET ring architecture. Most of these systems were
buried directly in the ground without protective conduit. The conversion of
these older systems to the use of SONET ring architecture requires more
bandwidth over additional route miles. Accordingly, the Company believes that
the Tier 1 carriers will generally need to replace or augment parts of their
networks to add more capacity, route diversity and redundancy to their systems
and to lower their overall operating costs. The Company believes that the older
systems operated by certain of the Tier 1 carriers generally face other
disadvantages when
 
                                       51
<PAGE>   53
 
compared to newer networks, such as those being constructed by Qwest
Communications International, Inc., IXC Carrier and DTI, including: (i) lower
transmission speeds, lower overall capacity and shorter distances between
regeneration/amplifier facilities; (ii) more costly maintenance requirements;
(iii) greater susceptibility to system interruption from physical damage to the
network infrastructure; and (iv) greater difficulty in upgrading to higher
quality fiber.
 
     CAPACITY REQUIRED BY NEW ENTRANTS. Competition and deregulation are
bringing new entrants into the long distance and local telecommunications
markets. The Company anticipates that this trend will accelerate as a result of
the Telecom Act. Upon meeting certain competitive conditions under the Telecom
Act, the RBOCs will be able to enter the long distance business and thus
position themselves as providers of single source service. The Telecom Act
similarly is eliminating barriers to entry in the local exchange market and also
enables other entities, including entities affiliated with power utilities and
ventures between ILECs and cable television companies, to provide an expanded
range of telecommunications services. As these entities emerge as long distance
and local exchange competitors, the Company believes they will need their own
facilities and additional high-bandwidth capacity to compete effectively with
facilities-based providers.
 
                                       52
<PAGE>   54
 
                                    BUSINESS
 
OVERVIEW
 
   
     DTI is a facilities-based provider of long-haul and local
telecommunications services primarily to IXCs and other communications entities
on a wholesale basis ("carrier's carrier services"), as well as directly to
business and governmental end users ("end-user services"). The Company is
building out the DTI network through the creation of regional rings by
interconnecting long haul routes among primary, secondary and tertiary cities in
the Midwest region because it believes that substantial unmet demand for
additional IXC capacity exists in secondary and tertiary markets located between
the primary markets. The Company has plans to expand its fiber optic
telecommunications network outward from the Midwest region to other similarly
underserved markets in the United States. The Company will strive to position
itself as a low-cost provider of telecommunications services, and believes it
will be able to offer regional ring transport to carrier customers on a more
economical basis than is currently available to such customers, particularly
among secondary and tertiary cities.
    
 
   
     DTI initially will focus on carrier's carrier services because it believes
that (i) the scope and flexibility of its ringed network design will be
attractive to carrier customers, (ii) revenues from carrier's carrier services
can be achieved more rapidly than from end-user services, and (iii) net margins
from the Company's carrier's carrier services are higher than the Company could
typically achieve from the Company's end-user services. DTI currently provides
carrier's carrier services under long-term contracts with AT&T, Sprint, MCI and
IXC Carrier, Inc., and private line long-haul and local access services to
targeted business and governmental end-user customers ("end-user customers") in
Missouri.
    
 
   
     DTI has completed construction of approximately 1,800 route miles of a
planned 2,000 route mile fiber optic network in the state of Missouri, including
an aggregate of approximately 500 local route miles in St. Louis, Kansas City
and four other population centers in Missouri with populations of over 70,000
people. DTI currently provides services over 750 route miles of its network. The
Company is expanding the DTI network to cover a 14-state Midwest region which is
expected to consist of approximately 7,700 route miles of fiber optic cable and
Nortel DMS-500 switches. DTI is also pursuing the expansion of the DTI network
to the east and west coasts of the United States, as well as additional network
in the Midwest region to facilitate such national expansion. (See the DTI
network map located on the inside front cover page of this Prospectus). The
Company's preliminary plans provide for a total national network of
approximately 15,000 route miles and 20 Nortel DMS-500 switches. The Company
expects to construct approximately half of such network and to obtain
indefeasible rights to use fiber optic facilities of other carriers for the
other half. As a part of this national expansion of the DTI network, the Company
has recently entered into a preliminary agreement for a long term indefeasible
right to use fiber optic strands and related facilities along a route from
Washington, D.C. to Texas.
    
 
   
     DTI intends to interconnect its long haul routes to form regional rings
among the primary, secondary and tertiary cities located along such routes. The
Company also intends to interconnect the DTI network to major IXC POPs and ILEC
access tandems along its regional rings. The Company will offer its carrier
customers with transmission capacity through individual wavelength-specific
circuits of OC-48 capacity, or optical windows, on dense wavelength division
multiplexing ("DWDM") equipment deployed throughout the regional rings. DTI also
intends to provide local switched service capacity to its carrier customers on a
wholesale basis as it deploys its switches. The Company believes these services
will provide each of its carrier customers with a high quality, ring redundant
means to efficiently deliver its calls to a significant number of end-users
along these rings and aggregate, for further long haul transport, the outgoing
calls of a carrier's customers along such rings to a single regional point of
interconnection between the carrier's network and DTI's network. The Company
will also offer use of its optical windows to its carrier customers as a means
to transport point-to-point dedicated data and voice circuit communications
along its network. The Company believes that its regional rings will offer its
carrier customers greater reliability and accountability and less administrative
burden than their typical current transport methods. Through strategic routing
and switch placement, DTI believes it can also leverage its regional rings and
long-haul capacity to permit the Company to cost-effectively construct local
loops and pursue other revenue-generating opportunities.
    
 
                                       53
<PAGE>   55
 
   
     The Company's existing business consists primarily of the provision of
carrier's carrier services through dedicated bandwidth agreements and
indefeasible rights to use dark fibers ("IRUs"). DTI provides these services to
both facilities-based and non-facilities-based carriers requiring long-haul
transmission capacity, local access, or both, to carry their own customers' long
distance traffic. DTI also currently offers private line services, which
generally include the transport of communications between points on its end-user
customers' own networks or to the facilities of a long distance carrier.
    
 
   
     The DTI network's self-healing, SONET ring architecture provides virtually
instantaneous rerouting in the event of a cut in a fiber ring. DTI expects that
more than 90% of the DTI network will be installed underground, providing
protection from weather and other environmental hazards affecting the
reliability of communication connections. The DTI network will have both
high-bandwidth capacity and flexibility as a result of, (i) high speed
transmission electronics equipment from Fujitsu, (ii) high capacity DWDM
equipment, (iii) the selective installation on Company-built routes of between
48 and 288 strands of fiber optic cable, incorporating Corning glass, and (iv)
extra conduits along selected long-haul routes that the Company constructs. (On
routes that the Company does not build, the Company expects to typically obtain
IRUs ranging from two to 12 optical fibers). The Company believes the use of
Fujitsu fiber optic terminal equipment will provide DTI's customers the ability
to monitor, in their own network control centers, the portions of the DTI
network that they utilize. The Fujitsu equipment should also permit DTI's
customers to utilize their own network control centers to add and remove
services on those portions of the DTI network they have a right to use. The use
of DWDM equipment will give the DTI network an open architecture, providing
compatibility with the broad range of transmission speeds and signal formats
used by the existing transmission systems of its carrier customers. The DWDM
equipment also will enable DTI to offer its carrier customers high capacity,
ring redundant, dedicated optical windows of a particular wavelength through
which its carrier customers can deliver telecommunications services on a
regional basis. The installation of high-fiber-count cables and extra conduits
on selected Company-built routes will provide DTI with the ability to expand the
capacity of its network and to sell dark fibers to its customers along certain
routes.
    
 
   
     The Company has installed its first Nortel DMS-500 switch in St. Louis. By
the end of 1998, the Company expects to have substantially completed
construction in Missouri. The Company is currently constructing fiber optic
facilities in Arkansas. In the next 12 to 18 months, the Company expects to have
commenced construction of fiber optic facilities on those routes along which it
will construct its facilities and to have reached agreement or commenced
negotiations for IRUs for the rest of the planned DTI network. The Company has
entered into a preliminary agreement for a long term IRU for fiber optic strands
and related facilities along a route from Washington, D.C. to Texas.
    
 
   
BUSINESS STRATEGY
    
 
   
     The Company's objective is to become a leading facilities-based provider of
communication services to other communications entities and end-user customers
in the Midwest region and selected other regions in the United States. To
achieve this objective, the Company intends to:
    
 
   
     LEVERAGE INTEGRATED LONG-HAUL ROUTES, REGIONAL RINGS AND LOCAL NETWORK
DESIGN. The Company believes that the strategic design of the DTI network will
allow it to offer reliable, high-capacity, long-haul and local switched services
on a region-by-region basis to carrier and end-user customers who seek a
competitive alternative to incumbent providers of such services. The regional
rings in the DTI network will interconnect primary, secondary and tertiary
markets and major IXC POPs and ILEC access tandems and, on most routes, will use
high-capacity, DWDM equipment. Local network rings will be constructed in
selected metropolitan areas near identified potential end-user customers, ILEC
access tandems and major IXC POPs. This integrated design will permit the
Company to provide its carrier customers with dedicated, high quality, ring
redundant OC-48 capacity optical windows, which can (i) efficiently deliver the
carrier's calls to a significant number of end-users along these rings and (ii)
aggregate, for further long haul transport, the outgoing calls of that carrier's
customers along such rings to a single regional point of interconnection between
the carrier's network and DTI's network. The DTI network design will also permit
the Company to offer its carriers customers with optical windows as a means to
transport point-to-point dedicated data and voice circuit
    
 
                                       54
<PAGE>   56
 
   
communications along its network. The Company believes that a carrier's use of
the DTI network with provide that carrier with greater reliability and
accountability and less administrative burden than their current transport
methods, which typically utilize two or more other carriers' networks.
    
 
   
     STRATEGICALLY LOCATE AND EXPAND ITS NETWORK THROUGH REGIONAL RINGS. The
Company is building out the DTI network through the creation of regional rings
by interconnecting long haul routes connecting primary, secondary and tertiary
cities in the Midwest region because it believes that substantial unmet demand
for additional IXC capacity exists in secondary and tertiary markets located
between the primary markets. The Company plans to expand its fiber optic
telecommunications network outward from the Midwest region to offer services to
other underserved markets in the United States. In general, new network
facilities will first be constructed or acquired along long-haul, point-to-point
routes. The Company will then construct or acquire other long-haul facilities to
create regional rings. Building the DTI network in this manner will help the
Company to (i) offer reliable connectivity on a regional basis and (ii) offer
high quality services cost-effectively to secondary and tertiary markets along
the Company's regional rings where the Company believes it is less likely to
face significant competition from ILECs and other competitive local exchange
carriers ("CLECs"). To complete the DTI network buildout, the Company expects
to: (i) purchase, for cash, indefeasible rights to use fiber optic facilities of
other telecommunications companies and (ii) exchange indefeasible rights to use
the Company's fiber optic facilities for the indefeasible right to use the fiber
optic facilities of other telecommunications companies. In this manner, the
Company believes that it would be able to establish telecommunications
facilities along the DTI network routes more quickly than by constructing all of
its own facilities.
    
 
   
     POSITION ITSELF AS A LOW-COST PROVIDER OF TELECOMMUNICATIONS SERVICES. The
Company will strive to position itself as a low-cost provider of
telecommunications services by (i) taking advantage of the potential cost
efficiencies of the DTI network design, (ii) continuing to deploy advanced fiber
optic network technology, which the Company believes lowers construction,
operating and maintenance costs, and (iii) realizing cost efficiencies through
existing and additional fiber optic facility long term IRU and swap agreements
with other telecommunications companies and rights-of-way agreements with
governmental authorities. The Company believes that its network design and the
deployment of DWDM will allow it to offer carrier customers regional ring
transport on a more economical basis than is currently available to such
customers.
    
 
   
     PURSUE LOCAL SWITCHED SERVICES OPPORTUNITIES. DTI believes its network
design will allow it to cost-effectively pursue local switched services
opportunities by creating regional and local fiber optic rings along its
long-haul routes and by leveraging the technical capabilities and high-bandwidth
capacity of the DTI network. The Company intends to provide local switched
service capacity to its carrier customers and to other facilities-based and
non-facilities-based telecommunications companies on a wholesale basis. The DTI
network's design will also provide the Company with sufficient long-haul
capacity to offer local switched services to targeted end-user customers in
primary, secondary and tertiary cities on the Company's regional rings. DTI will
also have the capacity to offer a wide range of local switched services,
including Caller ID, Voice Mail and Centrex services, and advanced data
transmission services, such as ATM and Frame Relay, as it expands its customer
base and increases network traffic volume.
    
 
   
     LEVERAGE EXPERIENCED MANAGEMENT TEAM. The Company's management team
includes individuals with significant experience in the deployment and marketing
of telecommunications services. Prior to founding DTI in 1989, Mr. Richard D.
Weinstein, President and Chief Executive Officer of DTI, owned and managed
Digital Teleresources, Inc., a firm which designed, engineered and installed
telecommunications systems for large telecommunications companies, including SBC
and other Fortune 500 companies. H.P. Scott, the Company's Senior Vice
President, has over 35 years of telecommunications industry experience, having
spent eighteen years with MCI Telecommunications Corporation and IXC Carrier,
Inc., where he held positions of senior responsibility for the design and
construction of their coast-to-coast fiber optic telecommunications networks.
Prior to joining DTI as Chief Financial Officer, Gary W. Douglass was the
Executive Vice President and Chief Financial Officer of publicly held Roosevelt
Financial Group, Inc., which was acquired by Mercantile Bancorporation in 1997,
and had previously spent 23 years at Deloitte & Touche LLP. Jerry W. Murphy, the
Company's Vice President -- Network Operations, spent 18 years with MCI, having
spent the
    
 
                                       55
<PAGE>   57
 
   
last 11 years in senior position in engineering, network implementation and
network operations positions. Jerome W. Sheehy, DTI's Vice President,
Regulatory-Industry Affairs, has over 42 years' experience in the
telecommunications industry, including 20 years at GTE.
    
 
THE DTI NETWORK
 
   
     GENERAL. The DTI network is an exclusively fiber optic cable communications
system substantially all of which employs self-healing, SONET ring architecture
to minimize downtime in the event of a cut in a fiber ring. The Company has
installed its first switch on the DTI network and expects that it will be fully
operational by the end of 1998. DTI expects that more than 90% of the fiber in
the DTI network will be installed underground, typically 36 to 48 inches under
the surface, providing protection from weather and other environmental hazards
affecting reliability of communication connections. The Company expects to
construct approximately half of the DTI network, and to obtain indefeasible
rights to use fiber optic facilities of other carriers for the other half. On
routes which the Company constructs, and on most routes which it acquires from
other carriers, the Company will employ SMF-28A fiber optic cable composed of
Corning glass fiber. All routes in the DTI network constructed by DTI are
comprised of at least 48 strands. In addition, in St. Louis and Kansas City, DTI
is installing 216 and 288 fiber strands, respectively. On routes that the
Company does not build, the Company expects to obtain IRUs for between 2 and 24
optical fibers. On certain strategic routes which it constructs, the DTI network
will also include one or two empty innerducts for maintenance and future growth
purposes. As part of its design, the Company typically retains 50% or more of
the capacity on each DTI network route for its own use.
    
 
   
     The Company currently has approximately 1,800 route miles of fiber optic
cable in place in Missouri and Arkansas, of which approximately 1,300 route
miles represent long-haul segments, and approximately 500 route miles represent
local loop networks in the St. Louis and Kansas City metropolitan areas, as well
as in Jefferson City, Columbia, Mexico and Fulton, Missouri. DTI currently
provides services over 750 route miles of its network.
    
 
     The following diagram illustrates how the DTI network connects to the
facilities of ILECs and IXCs, as well as to end-user customers.
 
                            DIAGRAM OF ILEC NETWORK
 
   
     NETWORK ELECTRONICS. Long-haul routes on the DTI network will generally
utilize DWDM equipment. DWDM equipment provides individual wavelength-specific
circuits of OC-48 capacity optical windows. All
    
 
                                       56
<PAGE>   58
 
   
DTI network DWDM equipment will initially be equipped to enable the Company to
provide the equivalent of eight dedicated, ring redundant, optical windows. Such
equipment will have the ability to be expanded to offer additional optical
windows as the need for capacity on the DTI network increases. The DWDM
equipment will permit the Company to offer to its carrier customers optical
windows on regional rings providing a dedicated, virtual circuit that can
interconnect any two points on that regional ring. The DWDM equipment, with the
accompanying optical add/drop multiplexing ("OADM") equipment, also will permit
the Company to efficiently provide high capacity telecommunications services to
secondary and tertiary markets that the Company believes are currently
underserved. The Company's use of open architecture, DWDM equipment conforming
to SONET standards on its regional rings and long-haul routes will also give the
DTI network the ability to interoperate with its carrier customers' existing
fiber optic transmission systems, which have a broad range of transmission
speeds and signal formats, without the addition of expensive conversion
equipment by those carriers.
    
 
   
     On all routes throughout the DTI network, whether constructed by DTI or
purchased or swapped from another carrier, the Company will install Fujitsu
high-bit-rate transmission electronics. The Company believes the use of Fujitsu
fiber optical terminal equipment will provide DTI's customers the ability to
monitor, in their own network control centers, the optical windows on the
regional rings that they utilize. The Fujitsu equipment should also permit DTI's
customers to utilize their own network control centers to add and remove
services on the optical windows serving that carrier. The DTI network design
will permit carriers to utilize the DTI network as a means to efficiently expand
their networks to areas not previously served, to provide redundancy to their
networks or to upgrade the technology in areas already served by such networks.
The DTI network will also be capable of providing services to carriers and
end-users in increments of less than a full OC-48 optical window, from OC-12s to
DS-3s.
    
 
   
     The Company believes that the DTI network design standards give it
sufficient transmission capacity to meet anticipated future increases in call
volume and the development of more bandwidth-intensive voice, data and video
telecommunication uses. The DTI network's capacity also will allow the Company
to deploy fewer high cost switches by facilitating the transport of rural
switched calls to and from distant centralized switching facilities. All network
operations are currently controlled from a single network control center in
suburban St. Louis, Missouri. The Company is currently constructing a second
control center in Kansas City, Missouri that can serve as a backup network
control center for the DTI network.
    
 
   
     NETWORK DESIGN. The DTI network is designed to include high-capacity (i)
long-haul routes between large metropolitan areas, (ii) regional rings
connecting primary, secondary and tertiary metropolitan areas to one another and
(iii) local rings in selected metropolitan areas along the regional rings. The
long-haul route portions of the DTI network will generally be located to allow
the Company to more easily interconnect with major IXC POPs and ILEC access
tandems in a region. Any major ILEC access tandem along a regional ring not
physically interconnected through DTI-owned facilities will be interconnected
through leased lines until there are sufficient customers to make construction
of a DTI-owned route to these access tandems economically feasible. Local
network portions of the DTI network in metropolitan areas are generally routed
near major business telecommunications users, metropolitan ILEC access tandems
and major central offices. DTI believes the different elements of the DTI
network complement each other and will create certain construction, operating
and maintenance synergies. DTI also believes its integrated long-haul route,
regional ring and local ring design will allow the Company to offer its carrier
and end-user customers private line and local switched services at a lower cost
by reducing the Company's use of ILEC and IXC facilities to provide services to
its customers.
    
 
   
     SWITCHING CAPACITY. The Company intends to install Nortel DMS-500
high-capacity switches in strategically located, geographically diverse
metropolitan areas to balance the expected traffic throughout the DTI network.
When coupled with its integrated network design, this switch placement will give
DTI the ability to offer local switched service and long-haul service to many
end-user customers along its regional rings. By using the expected excess
capacity on the DTI network, calls from diverse geographic regions in the DTI
network can be routed long distances from the originating point to one of the
Company's switches and on to their destination, reducing the number of switches
required and decreasing the cost and complexity of constructing, operating and
maintaining the DTI network. In addition, the strategic deployment of switches
is
    
 
                                       57
<PAGE>   59
 
   
expected to enable the Company to: (i) allow the Company to offer switched
services on a more economical basis, (ii) offer custom calling features and
billing enhancements to all of its customers without involving the ILEC, and
(iii) allow the Company to sell its local switched service capacity to other
carriers on a wholesale basis. The Company's first switch has been installed in
St. Louis, and the Company expects that it will be fully operational by the end
of 1998.
    
 
   
     HIGHWAY AND UTILITY RIGHTS-OF-WAY. Much of the currently completed DTI
network is located in rights-of-way obtained by DTI through strategic
relationships with utilities, state transportation departments and other
governmental authorities. The Company currently has built or has rights-of-way
to build approximately 2,250 route miles of the planned 15,000 total route miles
that will make up the DTI network. To build the long-haul portions of the DTI
network between population centers in Missouri, the Company has generally used
rights-of-way in the median of and along the interstate highway system. The
Company will seek to obtain the rights-of-way that it needs for the expansion of
its network in areas where it will construct network rather than purchase or
swap fiber optic strands by entering into agreements with other state highway
departments, utilities or pipeline companies and it may enter into joint
ventures or other "in-kind" transfers in order to obtain such rights. In
addition, DTI may use available public rights-of-way.
    
 
   
     BUILD-OUT PLAN. The Company plans to construct a 33-state fiber optic
network that will consist of approximately 15,000 route miles of fiber optic
cable, Fujitsu and DWDM signal transmission equipment, and Nortel DMS-500
switches strategically located in larger metropolitan areas. The Company expects
to construct approximately half of such network and to obtain indefeasible
rights to use fiber optic facilities of other carriers for the other half. As a
part of this national expansion of the DTI network, the Company recently entered
into a preliminary agreement for a long term indefeasible right to use fiber
optic strands and related facilities along a route from Washington, D.C. to
Texas.
    
 
   
     The following chart sets forth the planned fiber route miles within the
Midwest region (excluding any additional routes that the Company may build or
acquire to facilitate its expansion to the east and west coasts):
    
 
<TABLE>
<CAPTION>
                                                             PLANNED
STATE                                                      ROUTE MILES
- -----                                                      -----------
<S>                                                        <C>
Missouri.................................................     2,000
Kansas...................................................       260
Oklahoma.................................................       350
Arkansas.................................................       480
Tennessee................................................       290
Kentucky.................................................       250
Illinois.................................................     1,080
Iowa.....................................................       800
Nebraska.................................................       125
Indiana..................................................       330
Ohio.....................................................       160
Michigan.................................................       480
Wisconsin................................................       380
Minnesota................................................        60
Customer drop routes.....................................       655
                                                              -----
Total....................................................     7,700
</TABLE>
 
   
     To complete the DTI network buildout, the Company expects to (i) purchase,
for cash, indefeasible rights to use fiber optic facilities of other
telecommunications companies and (ii) exchange indefeasible rights to use the
Company's fiber optic facilities for the indefeasible right to use the fiber
optic facilities of other telecommunications companies. In this manner, the
Company believes that it would be able to establish telecommunications
facilities along the DTI network routes more quickly than by constructing all of
its own facilities.
    
 
                                       58
<PAGE>   60
 
   
     The Company has entered into certain agreements that require it to
construct network facilities. The MHTC Agreement requires the Company to build
approximately 1,200 miles of fiber optic network along Missouri's interstate
highway system prior to or by the end of 1998. The Company did not meet an
intermediate construction deadline for the construction of approximately 30
miles but expects to complete such construction by October 1998 and the
remainder of its construction requirements by the end of 1998. The Company must
complete construction on an additional 800 miles by the end of 1999 to maintain
its rights to such routes. An agreement between the Company and Union Electric
requires it to construct a fiber optic network linking Union Electric's 80-plus
sites throughout the states of Missouri and Illinois. As of June 30, 1998, the
Company had completed approximately 85% of the sites required for Union Electric
and expects completion of all such construction by the end of 1998. See "Risk
Factors -- Risks Related to Completing the DTI Network; Increasing Traffic
Volume."
    
 
   
     The Company estimates that total capital expenditures to complete the DTI
network will be approximately $673.2 million. Of this amount, the Company had
already expended approximately $62.8 million as of March 31, 1998. The Company
anticipates total capital expenditures for the expansion at the DTI network of
approximately $16.6 million in the remaining quarter of fiscal 1998 and $410.1
million in fiscal 1999. DTI's contract with Nortel requires the Company to
purchase five DMS-500 switches by October 1998 and an additional five DMS-500
switches by October 1999. Estimated total expenditures for fiscal 1999 include
existing commitments of $7.2 million, including expenditures for the purchase of
electronic equipment.
    
 
   
PRODUCTS AND SERVICES
    
 
   
     CARRIER'S CARRIER SERVICES
    
 
   
     "Carrier's carrier services" are generally the high capacity transmission
services used by IXCs, ILECs and CLECs to transmit telecommunications traffic.
Customers using carrier's carrier services include (i) facilities-based carriers
that require transmission capacity where they have geographic gaps in their
facilities, need additional capacity or require alternative routing and (ii)
non-facilities-based carriers requiring transmission capacity to carry their
customers' telecommunications traffic. Carrier's carrier service is a wholesale
pricing business characterized by net margins that are higher than the Company
could typically achieve through end-user services. This is primarily because
these services can be marketed more quickly and at a lower cost than is
generally necessary with end-user services. The Company currently has IRUs and
wholesale network capacity agreements. The Company's present and planned
carrier's carrier services are set forth below.
    
 
   
     Optical Windows. DTI plans to offer its carrier customers dedicated,
virtual circuits through the exclusive use of an OC-48 capacity, ring redundant
wavelength of light, or optical window, on the regional rings in the DTI
network. DTI intends to supply all fiber optic electronic equipment necessary to
transmit telecommunications traffic along the regional ring. The Company plans
to enter into agreements for the provision of optical windows for a term of
years with fixed monthly payments over the term of the agreement, regardless of
the level of usage. Uses of optical windows by an IXC can include
point-to-point, dedicated data and voice circuit communications connections, as
well as redundancy and overflow capacity for existing facilities of the IXC.
Possible uses of optical windows by ILECs include connection of its central
offices to other central offices or access tandems. An ILEC may also use such
agreements as a cost effective way to upgrade its network facilities. A CLEC may
use optical window agreements as a way of "filling out" its network.
    
 
   
     The Company also will offer its carrier customers the use of an OC-48
optical window to create a high quality, ring redundant means to efficiently
deliver its calls to a significant number of end-users along these rings and
aggregate, for further long haul transport, the outgoing calls of that carrier's
customers along such rings to a single regional point of interconnection between
the carrier's network and DTI's network. DTI will be able to offer this service
because (i) its network will be physically interconnected with all major IXC
POPs in a region, (ii) the DTI network will typically be interconnected through
its own or leased facilities to every major ILEC access tandem in a region, and
(iii) the DTI network will integrate high capacity DMS-500
    
 
                                       59
<PAGE>   61
 
   
switches. Currently, IXCs have to provide for the transport between each of
their POPs and from each of those POPs to each of the access tandems in the
areas adjacent to such POPs, which can involve the use of multiple networks and
carriers. DTI believes that its method of transporting an IXC's traffic directly
to access tandems would be attractive to an IXC because it should (i) reduce the
administrative burden on the IXC of terminating such calls, because the IXC will
have to contract with only one carrier to reach the ILEC access tandems, (ii)
result in greater reliability, because the calls are transported over a newer
system, with fewer potential points of failure and (iii) result in greater
accountability, because fewer telecommunications companies may be involved in
the delivery of such traffic. The Company expects that it would charge the IXC
for its call transport services on a per-call, per-minute basis, with the
per-minute fee dependent on the distance the call is transported by DTI.
    
 
   
     Dedicated Bandwidth Services. Through its other wholesale network capacity
agreements, also referred to as dedicated bandwidth agreements, the Company
provides carriers with bandwidth capacity on the DTI network in increments of
less than a full OC-48 optical window, such as a DS-3. The carrier customer in a
dedicated bandwidth agreement does not have exclusive use of any particular
strand of fiber or wavelength, but instead has the right to transmit a certain
amount of bandwidth between two points along the DTI network. The carrier
customer provides a telecommunications signal to DTI, and DTI provides all fiber
and electronic equipment necessary to transmit the signal to the end point. This
capacity may or may not be along a DTI regional ring providing redundancy.
Dedicated bandwidth agreements typically have terms ranging from five to 20
years, require the customer to pay for such capacity regardless of the level of
usage, and require fixed monthly payments or a combination of advance payments
and subsequent monthly payments over the term of the agreement. Dedicated
bandwidth agreements are marketed to ILECs, CLECs and IXCs for the same uses as
optical windows but offer an alternative for customers who (i) do not want or
need the capacity of one or more OC-48 optical windows, and (ii) do not wish to
provide and maintain the fiber optic transmission equipment necessary for the
operation of dark fibers. DTI offers some customers the right to switch their
service from dedicated bandwidth agreements to IRUs. DTI customers with
dedicated bandwidth agreements include AT&T, MCI, WorldCom and Ameritech
Cellular.
    
 
   
     IRUs. Through IRUs, the Company provides carrier customers specified
strands of optical fiber (which are used exclusively by the carrier customer),
while the carrier customers are responsible for providing the electronic
equipment necessary to transmit communications along the fiber. IRUs typically
have terms of 20 years and require substantial advance payments and additional
fixed annual maintenance payments over the term of the lease. Uses of IRUs by an
IXC are the same as those for optical windows or dedicated bandwidth agreements,
but permit a customer to use its own electronic equipment to light up the fibers
at any level of capacity it chooses. DTI's IRU customers include IXC carrier,
United Telephone and MCI.
    
 
   
     Carrier Branded Offerings. DTI plans to offer in the future any of its
services to other carriers for resale under that carrier's own name as branded
offerings, without identification of DTI as a service provider. For example, a
private line could be leased to an IXC to transmit the traffic of its large
business customers which are located on or near the DTI network from the
premises of such customers to the IXC's POPs, using the DTI network exclusively.
Currently, when an IXC offers long distance service to a major customer, it
generally uses the ILEC network facilities to transmit calls from the customer's
premises to the ILEC access tandem, for which the ILEC charges the IXC an access
fee, and then uses the ILEC network facilities or other leased facilities to
transmit the call to the IXC's local POP. For such major customers, the IXC
generally does not charge separately for the access charges or other payments
necessary to transport such call to the IXC's POP, and instead offers such
transport as part of the IXC's branded long distance service. For the IXC's
customers who are on or near the DTI network, DTI will be able to offer the IXC
an alternative mode of transport to the IXC's POP, using DTI network facilities
exclusively. This service is expected to be offered to IXCs on a contract for a
term of years, on a take or pay basis, and providing for fixed monthly payments.
The Company believes its network design and cost structure will allow it to
compete effectively with ILECs for this service.
    
 
                                       60
<PAGE>   62
 
     END-USER SERVICES
 
     End-user services are telecommunications services provided to business and
governmental end users. The Company currently provides private line services
connecting certain points on a given end user's private telecommunications
network and in the past has established connections between such private network
and the facilities of that end user's long distance service provider.
 
     Private Line Services. A private line is an unswitched, generally
non-exclusive, lighted telecommunications transmission circuit used to transport
data, voice and video communications. The customer may use a private line for
communications between otherwise unconnected points on its internal network or
to connect its facilities to a switched IXC. Private line calls are generally
routed by a customer through the customer's Private Branch Exchange ("PBX")
facilities to a receiving terminal on DTI's network. DTI then transmits the
signals over the DTI network to the customer's terminal in the call recipient's
area or to the POP for the customer's long distance provider. For example, the
Company has established private line bypass services for a major retailer and a
major hospital in the St. Louis metropolitan area. The Company's current private
line service agreements have terms ranging from three to seven years and
typically require a one-time installation charge as well as fixed monthly
payments throughout the term of the agreement regardless of level of usage.
 
   
     Local Switched Services. Through the addition of high-capacity switches at
strategic points on the DTI network, the Company in the future will have the
capacity to provide local switched services connecting its customers with other
end users either on the DTI network or on the networks of other local service
providers, and to long distance providers serving the call recipient. As a part
of providing local switched services, the Company intends to offer a wide range
of services and features including Caller ID, Voice Mail and Centrex services.
All long-haul and local telecommunications services provided by DTI would be
charged to the customer on one consolidated bill. As a provider of local
switched service, the Company expects to receive subscriber-paid service charges
based on a flat-rate or per-minute-of-use basis, or both, and would be based on
either a month-to-month or minimum term of years, based on the cost incurred by
the Company in establishing the services. The Company would also receive
IXC-paid per-minute access charges for completing the IXC's connection to users
on the DTI network, and the LEC-paid access charges for terminating the
competing LEC's local calls to users on the DTI network. The Company completed
installation of the first switch in January 1998, expects to begin offering
services on that switch in late 1998, and estimates that the remaining 19 will
be in place and operational by the end of 1999.
    
 
   
     Data Transmission Services. The Company anticipates installing the
equipment and transmission capacity necessary to offer high speed data
transmission services to its customers. These services would include ATM and
Frame-Relay transmission methods that provide high-speed transmission of data.
The Company will offer these services to end users as well as to carriers for
resale to end users, with pricing on a flat-rate or measured basis over terms
ranging from month-to-month to one to three years. The Company believes that the
DTI network's current and planned system architecture, with minor additions or
modifications, will accommodate emerging Internet Protocol ("IP") technologies.
    
 
SALES AND MARKETING
 
     The Company's sales and marketing staff is currently organized into two
groups: carrier's carrier services and end-user services. DTI currently has one
person focusing solely on carrier's carrier services and five direct sales and
marketing personnel pursuing sales of end-user services. Sales personnel are
compensated through a combination of salary and commissions. The Company plans
to significantly expand its sales and marketing activities. By mid-1999, DTI
intends to hire an additional 13 and 38 persons to focus on sales to carrier and
end-user customers, respectively. The Company currently has a sales office in
St. Louis and Springfield, Missouri and expects to open sales locations in
Kansas City and in Illinois by mid-1999. DTI also plans to hire additional
personnel (not including additional carrier's carrier and end-user sales
personnel) to form a separate marketing force to implement its marketing
strategies, including those relating to its carrier branded offerings, IXC call
transport services, local switched services and data transmission services.
 
                                       61
<PAGE>   63
 
     CARRIER'S CARRIER SERVICES. DTI's carrier's carrier services are marketed
and sold to facilities-based and nonfacilities-based carriers that require
capacity in the form of dark fiber leases and wholesale network capacity
agreements to provide added capacity in markets they currently serve, bridge
geographic gaps in their facilities or require geographically different routing
of their long distance or local traffic. The Company relies on direct selling to
other carriers on a wholesale basis. DTI's sales efforts also emphasize
providing continued customer support services to its existing customers. The
Company intends to distinguish itself in the carrier's carrier market on the
basis of pricing, quality, availability of capacity and flexibility and range of
services.
 
   
     The Company's current focus in its carrier's carrier business is on selling
private line services to ILECs, CLECs and IXCs, including those sold as part of
a carrier branded offering. Upon commencement of the provision of switched
services, which DTI expects will occur in Missouri by the end of 1998, the
Company will expand its sales and marketing efforts to include IXC call
transport services. The Company also intends to provide local switched service
capacity to its carrier's carrier customers on a wholesale basis as it deploys
switches throughout the Midwest region. DTI does not currently anticipate
offering switched long distance services under a Company brand.
    
 
   
     END-USER SERVICES. Through its direct sales personnel, DTI markets and
sells its end-user services to business and governmental end users that require
private line services to transport an end user's private telecommunications
network among multiple office sites or data centers and between the end user's
private network and its long distance provider. End-user sales generally are
project-driven and typically involve sales cycles of two to six months. In
direct sales to end users, DTI sales personnel call on prospective customers
and, as the Company expands its end-user service offerings, existing customers
whose premises are located on or near the DTI network. For customers that are
not located on the local rings of the DTI network, the Company will consider
leasing circuits from the local ILEC or other telecommunications company or, if
necessary, build out its network directly to such customers.
    
 
   
     The Company intends to distinguish itself to end-users on the basis of
pricing, customer responsiveness and creative product implementation. In
addition to hiring additional personnel and opening two new sales offices, DTI
plans to organize its direct sales force by state and, as the DTI network and
the Company's addressable target market expand, by region. Senior sales
management intends to pursue large business customers as reference accounts in
each market served by the DTI network, often offering a deeper discount than
that available to smaller users. Once a reference account in a market is
established, the Company's sales staff will pursue other large and small
end-users, using the visible reference account to add credibility and generate
additional end-user sales. As the Company enters into more interconnection
agreements with the ILECs, it will consider using the ILECs' unbundled local
loops to expand its small business customer base.
    
 
COMPETITION
 
   
     The telecommunications industry is highly competitive. The Company competes
and, as it expands its network within and outside the Midwest region, expects to
compete with numerous established facilities-based IXCs, ILECs and CLECs. These
competitors have substantially greater financial and technical resources,
long-standing relationships with their customers and the potential to subsidize
competitive services from less competitive service revenues. DTI is aware that
other facilities-based providers of local and long distance telecommunications
services are planning and constructing additional networks that, if and when
completed, could employ advanced fiber optic technology similar to the DTI
network. Such competing networks may also have similar operating capability to
that of the DTI network and be positioned geographically to compete directly
with the DTI network for many of the same customers along a significant portion
of the same routes. Unlike certain of the Company's competitors, who are
constructing or have announced plans to construct nationwide fiber optic
networks, DTI is deploying a network design that it believes will allow it to
address secondary and tertiary markets located along the DTI network's regional
rings, which markets the Company believes are underserved by existing carriers
and are not expected to be the primary targets of such newly constructed long
distance networks.
    
 
                                       62
<PAGE>   64
 
   
     The Company competes primarily on the basis of price, transmission quality,
reliability and customer service and support. The Company's competitors in
carrier's carrier services include many large and small IXCs including AT&T,
MCI, Sprint, WorldCom, Qwest and McLeod. In the carrier's carrier services
market, the Company's principal competitors in Missouri are IXC Carrier and
WorldCom. The Company competes with both LECs and IXCs in its end-user business.
In the end-user private line services market, the Company's principal
competitors in Missouri are SBC, GTE and United Telephone. In the local exchange
market, the Company faces or expects to face competition from ILECs and other
competitive providers, including non-facilities based providers, and, as the
local access markets become opened to IXCs under the Telecom Act, from long
distance providers. AT&T, MCI and Sprint, among other carriers, have each
indicated their intention to begin offering local telecommunications services in
major U.S. markets using their own facilities or by resale of the ILECs' or
other providers' services. In fact, certain competitors, including MCI, Sprint
and AT&T, have entered into interconnection agreements with Ameritech with
respect to the States of Illinois and Michigan. These competitors either have
begun or will likely begin offering local exchange service in those states,
subject to certain restrictions contained in the Telecom Act. See "-- Regulatory
Matters."
    
 
   
     Some major long distance and local telecommunications service providers
have also recently indicated a willingness to consolidate their operations to
offer a joint long distance and local package of telecommunications services.
WorldCom, together with its wholly owned subsidiaries MFS and Brooks Fiber,
currently provides both local exchange and long distance telecommunications
services throughout the United States. Unlike WorldCom, however, DTI's network
is designed to reach secondary and tertiary markets, which are substantially
bypassed by WorldCom's long-haul and local exchange networks. WorldCom has also
announced its agreement to acquire MCI. In addition, AT&T announced its
agreement to acquire TCG, a facilities-based CLEC with networks in operation in
57 markets in the United States, and SBC has announced agreements to acquire
Ameritech, one of the original seven RBOCs, and SNET. Further, Qwest, a
communications provider building a 16,000-mile fiber optic network in the United
States, announced its agreement to acquire LCI International Inc., a retail long
distance provider, which acquisition would create the nation's fifth largest
long distance company. The Company also believes that high initial network cost
and low marginal costs of carrying long distance traffic have led to a trend
among non-facilities-based carriers to consolidate in order to achieve economies
of scale. Such consolidation among significant telecommunications carriers could
result in larger, better capitalized competitors that can offer a "one-stop
shopping" combination of long distance and local switched services in many of
DTI's target markets.
    
 
   
     Certain companies have recently announced efforts to use Internet
technologies to supply telecommunications services, potentially leading to a
lower cost of supplying these services and therefore increased pressure on IXCs
and other telecommunications companies to reduce their prices. There can be no
assurance that the Company's IXC and other carrier customers will not experience
substantial decreases in call volume or pricing due to competition from
Internet-based telecommunications, which could lead to a decreased need for the
Company's services, or a reduction in the amount these companies are willing or
able to pay for the Company's services. There can also be no assurance that the
Company will be able to offer its telecommunications services to end users at a
price that is competitive with the Internet-based telecommunications services
offered by these companies. The Company does not currently market to ISP's and
therefore may not realize any revenues from the Internet-based
telecommunications market. If the Company does commence marketing to ISP's,
there can be no assurance that it will be able to do so successfully, which
would have a material adverse effect on the Company's business, financial
condition and results of operations.
    
 
     In addition to IXCs and LECs, entities potentially capable of offering
local switched services in competition with the DTI network include cable
television companies, electric utilities, microwave carriers, wireless telephone
system operators and large subscribers who build private networks. Previous
impediments to certain utility companies entering telecommunications markets
under the Public Utility Holding Company Act of 1935 were also removed by the
Telecom Act, at the same time creating both a new competitive threat and a
source of strategic business and customer relationships for DTI.
 
                                       63
<PAGE>   65
 
     In the future, the Company may be subject to more intense competition due
to the development of new technologies, an increased supply of domestic and
international transmission capacity, the consolidation in the industry among
local and long distance service providers, and the effects of deregulation
resulting from the Telecom Act. The telecommunications industry is experiencing
a period of rapid technological evolution, marked by the introduction of new
product and service offerings and increasing satellite transmission capacity for
services similar to those provided by the Company. For instance, recent
technological advances permit substantial increases in transmission capacity of
both new and existing fiber, and the introduction of new products or the
emergence of new technologies may reduce the cost or increase the supply of
certain services similar to those provided by the Company. The Company cannot
predict which of many possible future product and service offerings will be
crucial to maintaining its competitive position or what expenditures will be
required to profitably develop and provide such products and services.
 
   
     The Company believes its existing and planned rights-of-way along
interstate highway systems and public utility infrastructures have played and
could continue to play a significant role in achieving its business objectives.
However, there can be no assurance that competitors will not obtain rights to
use the same or similar rights-of-way for expansion of their communications
networks.
    
 
     Many of the Company's competitors and potential competitors have financial,
personnel, marketing and other resources significantly greater than those of the
Company, as well as other competitive advantages. A continuing trend toward
business combinations and alliances in the telecommunications industry may
increase the resources available to DTI's competitors and create significant new
competitors. The ability of DTI to compete effectively will depend upon, among
other things, its ability to deploy and enhance the DTI network throughout the
Midwest region and to maintain high quality services at prices equal to or below
those charged by its competitors. There can be no assurance that the Company
will be able to compete successfully with existing competitors or new entrants
in the markets for carrier's carrier and end-user services and any of the other
services DTI plans to offer in the future. Failure of the Company to do so would
have a material adverse effect on the Company's business, financial condition,
results of operations and business prospects. See "Risk Factors -- Competition."
 
REGULATORY MATTERS
 
     GENERAL REGULATORY ENVIRONMENT. The Company's operations are subject to
extensive Federal and state regulation. Carrier's carrier and end-user services
are subject to the provisions of the Communications Act of 1934, as amended,
including the Telecom Act, and the FCC regulations thereunder, as well as the
applicable laws and regulations of the various states, including regulation by
public utility commissions and other state agencies. Federal laws and FCC
regulations apply to interstate telecommunications, while state regulatory
authorities have jurisdiction over telecommunications both originating and
terminating within the state. The regulation of the telecommunications industry
is changing rapidly, and the regulatory environment varies substantially from
state to state. Moreover, as deregulation at the Federal level occurs, some
states are reassessing the level and scope of regulation that may be applicable
to telecommunications service providers, such as the Company. All of the
Company's operations are also subject to a variety of environmental, safety,
health and other governmental regulations. There can be no assurance that future
regulatory, judicial or legislative activities will not have a material adverse
effect on the Company, or that domestic regulators or third parties will not
raise material issues with regard to the Company's compliance or noncompliance
with applicable regulations.
 
     A recent Federal legislative change, the Telecom Act, may have potentially
significant effects on the operations of the Company. The Telecom Act, among
other things, allows the RBOCs to enter the long distance business after meeting
certain competitive market conditions, and enables other entities, including
entities affiliated with power utilities and ventures between ILECs and cable
television companies, to provide an expanded range of telecommunications
services. The General Telephone Operating Companies may enter the long distance
markets without meeting these FCC criteria. Entry of such companies into the
long distance business would result in substantial competition for carrier's
carrier service customers, and may have a material adverse effect on the Company
and such customers. However, the Company believes the RBOCs'
 
                                       64
<PAGE>   66
 
and other companies' participation in the market will provide opportunities for
the Company to lease dark fiber or sell wholesale network capacity.
 
     Under the Telecom Act, the RBOCs may immediately provide long distance
service outside those states in which they provide local exchange service
("out-of-region" service), and long distance service within the regions in which
they provide local exchange service ("in-region" service) upon meeting certain
conditions. The General Telephone Operating Companies may enter the long
distance market without regard to limitations by region. The Telecom Act does,
however, impose certain restrictions on, among others, the RBOCs and General
Telephone Operating Companies in connection with their provision of long
distance services. Out-of-region services by RBOCs are subject to receipt of any
necessary state and/or Federal regulatory approvals that are otherwise
applicable to the provision of intrastate and/or interstate long distance
service. In-region services by RBOCs are subject to specific FCC approval and
satisfaction of other conditions, including a checklist of pro-competitive
requirements. On December 31, 1997, the U.S. District Court, Northern District
of Texas (Wichita Falls) ("Court"), in SBC Communications, Inc., v. FCC and U.S.
("SBC Communications Case"), overturned as unconstitutional the provisions of
the Telecom Act which prohibited RBOCs from providing inter-LATA long distance
services within their own region without demonstrating that the local exchange
market was opened to local competition. The decision, however, affects only SBC
Communications, Inc. and U.S. West, Inc. Nonetheless, other RBOCs may use the
decision to petition courts in their operating regions to obtain similar
rulings. On January 2, 1998, AT&T, MCI and other intervenors in SBC
Communications Case filed a petition for stay with the Court. On January 5,
1997, the FCC also filed a petition for stay of the decision in the Court. On
February, 11, 1998, the Court temporarily stayed the decision in the SBC
Communications Case, which places those provisions of the Telecom Act which had
been found unconstitutional back into effect and forecloses, temporarily, the
RBOCs from providing inter-LATA long distance service within their own service
regions without FCC approval. The RBOCs may provide in-region long distance
services only through separate subsidiaries with separate books and records,
financing, management and employees, and all affiliate transactions must be
conducted on an arm's length and nondiscriminatory basis. The RBOCs are also
prohibited from jointly marketing local and long distance services, equipment
and certain information services unless competitors are permitted to offer
similar packages of local and long distance services in their market. Further,
the RBOCs must obtain in-region long distance authority before jointly marketing
local and long distance services in a particular state. Additionally, AT&T and
other major carriers serving more than 5% of presubscribed long distance access
lines in the United States are also restricted from packaging other long
distance services and local services provided over RBOC facilities. The General
Telephone Operating Companies are subject to the provisions of the Telecom Act
that impose interconnection and other requirements on ILECs. General Telephone
Operating Companies providing long distance services must obtain regulatory
approvals otherwise applicable to the provision of long distance services.
 
     FEDERAL REGULATION. The FCC classifies the Company as a non-dominant
carrier. Generally, the FCC has chosen not to exercise its statutory power to
closely regulate the charges, practices or classifications of non-dominant
carriers. However, the FCC has the power to impose more stringent regulation
requirements on the Company and to change its regulatory classification. In the
current regulatory atmosphere, the Company believes the FCC is unlikely to do so
with respect to the Company's service offerings.
 
     The FCC regulates many of the charges, practices and classifications of
dominant carriers to a greater degree than non-dominant carriers. Among domestic
carriers, large ILECs and the RBOCs are currently considered dominant carriers
for the provision of interstate access services, while all other interstate
service providers are considered non-dominant carriers. On April 18, 1997, the
FCC ordered that the RBOCs and independent CLECs offering domestic interstate
inter-LATA services, in-region or out-of-region, be regulated as non-dominant
carriers. However, such services offered in-region must be offered in compliance
with the structural separation requirements mentioned above. AT&T was classified
as a dominant carrier, but AT&T successfully petitioned the FCC for non-dominant
status in the domestic interstate interexchange market in October 1995 and in
the international market in May 1996. Therefore, certain pricing restrictions
that once
 
                                       65
<PAGE>   67
 
applied to AT&T have been eliminated. A number of parties have, however, sought
the FCC's reconsideration of AT&T's status. The Company is unable to predict the
outcome of these proceedings on its operations.
 
     As a non-dominant carrier, the Company may install and operate wireline
facilities for the transmission of domestic interstate communications without
prior FCC authorization, but must obtain all necessary authorizations from the
FCC for use of any radio frequencies. Non-dominant carriers are required to
obtain prior FCC authorization to provide international telecommunications;
however the Company currently does not and has no intent to provide
international services. The FCC also must provide prior approval of certain
transfers of control and assignments of operating authorizations. Non-dominant
carriers are required to file periodic reports with the FCC concerning their
interstate circuits and deployment of network facilities. The Company is
required to offer its interstate services on a nondiscriminatory basis, at just
and reasonable rates, and is subject to FCC complaint procedures. While the FCC
generally has chosen not to exercise direct oversight over cost justification or
levels of charges for services of non-dominant carriers, the FCC acts upon
complaints against such carriers for failure to comply with statutory
obligations or with the FCC's rules, regulations and policies. The Company could
be subject to legal actions seeking damages, assessment of monetary forfeitures
and/or injunctive relief filed by any party claiming to have been injured by the
Company's practices. The Company cannot predict either the likelihood of the
filing of any such complaints or the results if filed.
 
     Under existing regulations, non-dominant carriers are required to file with
the FCC tariffs listing the rates, terms and conditions of both interstate and
international services provided by the carrier. On October 29, 1996, the FCC
adopted an order in which it eliminated, as of September 1997, the requirement
that non-dominant interstate carriers such as the Company maintain tariffs on
file with the FCC for domestic interstate services, and in fact prohibited the
filing of such tariffs. Such carriers were given the option to cease filing
tariffs during a nine-month transition period that concludes on September 22,
1997. The FCC's order was issued pursuant to authority granted to the FCC in the
Telecom Act to "forbear" from regulating any telecommunications service provider
if the FCC determines that the public interest will be served. However, on
February 19, 1997, the United States Court of Appeals for the District of
Columbia Circuit suspended the FCC's order pending further expedited judicial
review and/or FCC reconsideration. In August 1997, the FCC issued an order on
reconsideration in which it affirmed its decision to impose complete or
mandatory detariffing, although it decided to allow optional or permissive
tariffing in certain limited circumstances (including interstate, domestic,
interexchange dial-around services, which end users access by dialing a
carrier's 10XXX access code). This order also remains subject to the Court of
Appeals' stay pending further judicial review. The Company cannot predict the
ultimate outcome of this or other proceedings on its service offerings or
operations. The Company has filed a tariff with the FCC.
 
     On May 8, 1997, the FCC released an order intended to reform its system of
interstate access charges to make that regime compatible with the
pro-competitive deregulatory framework of the Telecom Act. Access service is the
use of local exchange facilities for the origination and termination of
interexchange communications. The FCC's historic access charge rules were
formulated largely in anticipation of the 1984 divestiture of AT&T and the
emergence of long distance competition, and were designated to replace piecemeal
arrangements for compensating ILECs for use of their networks for access, to
ensure that all long distance companies would be able to originate and terminate
long distance traffic at just, reasonable, and non-discriminatory rates, and to
ensure that access charge revenues would be sufficient to provide certain levels
of subsidy to local exchange service. While there has been pressure on the FCC
historically to revisit its access pricing rules, the Telecom Act has made
access reform timely. The FCC's recent access reform order adopts various
changes to its rules and policies governing interstate access service pricing
designed to move access charges, over time, to more economically efficient
levels and rate structures. Among other things, the FCC modified rate structures
for certain non-traffic sensitive access rate elements, moving some costs from a
per-minute-of-use basis to flat-rate recovery, including one new flat rate
element; changed its structure for interstate transport services; and affirmed
that ISPs may not be assessed interstate access charges. In response to claims
that existing access charge levels are excessive, the FCC stated that it would
rely on market forces first to drive prices for interstate access to levels that
would be achieved through competition but that a "prescriptive" approach,
specifying the nature and timing of changes to existing access rate levels,
might be adopted in the absence of competition. Though the Company believes that
access reform through lowering and/or eliminating excessive
 
                                       66
<PAGE>   68
 
access services charges will have a positive effect on its services offerings
and operations, it cannot predict how or when such benefits may present
themselves, or the outcome of the pending judicial appeals or petitions for FCC
reconsideration.
 
     On October 15, 1996, the U.S. Court of Appeals for the Eighth Circuit
issued a stay of the implementation of certain of the FCC's rules and on July
18, 1997, the Court issued its decision finding that the FCC lacked statutory
authority under the Telecom Act for certain of its rules. In particular, the
Court found that the FCC was not empowered to establish the pricing standards
governing unbundled local network elements or wholesale local services of the
ILECs. The Court also struck down other FCC rules, including one that would have
enabled new entrants to "pick and choose" from provisions of established
interconnection agreements between the ILECs and other carriers. The Court
rejected certain other objections to the FCC rules brought by the ILECs or the
states, including challenges to the FCC's definition of unbundled elements, and
to the FCC's rules allowing new competitors to create their own networks by
combining ILEC network elements together without adding additional facilities of
their own. On October 14, 1997, the Eighth Circuit ruled in favor of those ILECs
and substantially modified its July 18, 1997 decision. The Eighth Circuit ruled
that ILECs cannot be compelled to "combine" two or more unbundled elements into
"platforms" or combinations, finding that IXCs must either combine the elements
themselves, or purchase entire retail services at the applicable wholesale
discounts if they wish to offer local services to their customers. The latter
omission was the subject of petitions for reconsideration filed with the Eighth
Circuit by ILECs.
 
     The overall impact of the Eighth Circuit's decision is to materially reduce
the role of the FCC in fostering local competition, including its ability to
take enforcement action if the Telecom Act is violated, and increase the role of
state utility commissions. The Supreme Court recently announced that it would
review the Eighth Circuit's decision. Meanwhile, certain state commissions have
asserted that they will be active in promoting local telephone competition using
the authority they have under the ruling, lessening the significance of the
reduced FCC role. At this time the impact of the Eighth Circuit's decision
cannot be evaluated, but there can be no assurance that the Eighth Circuit's
decision and related developments will not have a material adverse effect on the
Company. Furthermore, other FCC rules related to local telephone competition
remain the subject of legal challenges, and there can be no assurance that
decisions affecting those rules will not be adverse to companies seeking to
enter the local telephone market.
 
     The FCC also released a companion order on universal service reform on May
8, 1997. The universal availability of basic telecommunications service at
affordable prices has been a fundamental element of U.S. telecommunications
policy since enactment of the Communications Act of 1934. The current system of
universal service is based on the indirect subsidization of ILEC pricing, funded
as part of a system of direct charges on some ILEC customers, including IXCs
such as the Company, and above-cost charges for certain ILEC services such as
local business rates and access charges. In accordance with the Telecom Act, the
FCC adopted plans to implement the recommendations of a Federal-State Joint
Board to preserve universal service, including a definition of services to be
supported, and defining carriers eligible for contributing to and receiving from
universal service subsidies. The FCC ruled, among other things, that:
contributions to universal service funding be based on all IXCs' gross revenues
from both interstate and international telecommunications services; only common
carriers providing a full complement of defined local services be eligible for
support; and up to $2.3 billion in new annual subsidies for discounted
telecommunications services used by schools, libraries, and rural health care
providers be funded by an assessment on total interstate and intrastate revenues
of all IXCs. The FCC stated that it intends to study the mechanism for continued
support of universal service in high cost areas in a subsequent proceeding. The
Company is unable to predict the outcome of these proceedings or of any judicial
appeal or petition for FCC reconsideration on its operations.
 
     On April 11, 1997, the FCC released an order requiring that all carriers
transition from three-digit to four-digit Carrier Identification Codes ("CICs")
by January 1, 1998. CICs are the suffix of a carrier's Carrier Access Code
("CAC"), and the transition will expand CACs from five (10XXX) to seven digit
(101XXXX). These codes permit customers to reach their carrier of choice from
any telephone. In response to petitions for reconsideration of this design,
arguing in part that this short transition (following the FCC's proposal for a
six year transition) does not permit carriers sufficient time to make necessary
hardware and
 
                                       67
<PAGE>   69
 
software upgrades or to educate their customers regarding the need to dial
additional digits to reach their carrier of choice, on October 20, 1997 the FCC
modified its decision. The FCC has created a "two step" end to the transaction
in which three and four digit Feature Group D CICs co-exist. By January 1, 1998,
all LECs that provide equal access must have completed switch changes to
recognize four digit CICs (First Phase). The second phase ends June 30, 1998 on
which date only four digit CICs and seven digit CACs will be recognized.
 
     STATE REGULATION. The Company is also subject to various state laws and
regulations. Most public utilities commissions require providers such as the
Company to obtain authority from the commission prior to the initiation of
service. In most states, including the 14 states in the Midwest region, the
Company also is required to file tariffs setting forth the terms, conditions and
prices for services that are classified as intrastate. The Company also is
required to update or amend its tariffs when it adjusts its rates or adds new
products, and is subject to various reporting and record-keeping requirements.
 
     Many states also require prior approval for transfers of control of
certified carriers, corporate reorganizations, acquisitions of
telecommunications operations, assignment of carrier assets, carrier stock
offerings and incurrence by carriers of significant debt obligations.
Certificates of authority can generally be conditioned, modified, canceled,
terminated or revoked by state regulatory authorities for failure to comply with
state law and/or the rules, regulations and policies of state regulatory
authorities. Fines or other penalties also may be imposed for such violations.
There can be no assurance that state utilities commissions or third parties will
not raise issues with regard to the Company's compliance with applicable laws or
regulations.
 
     The Company has all necessary authority to offer local and interstate and
intrastate long-haul services in Missouri. The Company is authorized to provide
intrastate long-haul service in Illinois. The Company will seek authority in
other states as and when needed as a result of its network build-out.
 
     Many issues remain open regarding how new local telephone carriers will be
regulated at the state level. For example, although the Telecom Act preempts the
ability of states to forbid local service competition, the Telecom Act preserves
the ability of states to impose reasonable terms and conditions of service and
other regulatory requirements. However, these statutes and related questions
arising from the Telecom Act will be elaborated through rules and policy
decisions made by PUCs in the process of addressing local service competition
issues.
 
     The Company also will be heavily affected by state PUC decisions related to
the ILECs. For example, PUCs have significant responsibility under the Telecom
Act to oversee relationships between ILEC's and their new competitors with
respect to such competitors' use of the ILEC's network elements and wholesale
local services. PUCs arbitrate interconnection agreements between the ILECs and
new competitors such as the Company when necessary. PUCs are considering ILEC
pricing issues in major proceedings now underway. PUCs will also determine how
competitors can take advantage of the terms and conditions of interconnection
agreements that ILECs reach with other carriers. It is too early to evaluate how
these matters will be resolved, or their impact on the ability of the Company to
pursue its business plan.
 
     States also regulate the intrastate carrier's carrier services of the
ILECs. The Company is required to pay such access charges to originate and
terminate its intrastate long distance traffic. The Company could be adversely
affected by high access charges, particularly to the extent that the ILECs do
not incur the same level of costs with respect to their own intrastate long
distance services. A related issue is use by certain ILECs, with the approval of
PUCs, of extended local area calling that converts otherwise competitive
intrastate toll service to local service. States also are or will be addressing
various intraLATA dialing parity issues that may affect competition. It is
unclear whether state utility commissions will adopt changes in their rules
governing intrastate access charges similar to those recently approved by the
FCC for interstate access or whether the outcome of currently pending litigation
will give PUCs the power to set such access charges. The Company's business
could be adversely affected by such changes.
 
     The Company also will be affected by how states regulate the retail prices
of the ILECs with which it competes. The Company believes that, as the degree of
intrastate competition increases, the states will offer
 
                                       68
<PAGE>   70
 
the ILECs increasing pricing flexibility. This flexibility may present the ILECs
with an opportunity to subsidize services that compete with the Company's
services with revenues generated from non-competitive services, thereby allowing
ILECs to offer competitive services at lower prices than they otherwise could.
The Company cannot predict the extent to which this may occur or its impact on
the Company's business.
 
     Those states that permit the offering of intrastate/intra-LATA service by
IXCs generally require that end users desiring to use such services dial special
access codes. Regulatory agencies in a number of states have issued decisions
that would permit the Company and other IXCs to provide intra-LATA calling on a
1 + basis. Further, the Telecom Act requires in most cases that the RBOCs
provide such dialing parity coincident to their providing in-region inter-LATA
services. The Company expects to benefit from the ability to offer 1 +
intra-LATA services in states that allow this type of dialing parity.
 
     LOCAL REGULATION. The Company is occasionally required to obtain street use
and construction permits and licenses and/or franchises to install and expand
its fiber optic network using municipal rights-of-way. Termination of the
existing license agreements prior to their expiration dates or a failure to
renew the license agreements and a requirement that the Company remove its
facilities or abandon its network in place could have a material adverse effect
on the Company. In some municipalities where the Company has installed or
anticipates constructing networks, it will be required to pay license fees based
on a percentage of gross revenue or on a per linear foot basis. There can be no
assurance that, following the expiration of existing licenses, fees will remain
at their current levels. In addition, the Company could be at a competitive
disadvantage if its competitors do not pay the same level of fees as the
Company. However, the Telecom Act requires municipalities to manage public
rights-of-way in a competitively neutral and nondiscriminatory manner.
 
PROPERTIES
 
   
     The Company's network in progress and its fiber optic cable, transmission
equipment and other component assets are the principal properties owned by the
Company. The Company's installed fiber optic cable is laid under the various
rights-of-way held by the Company. Other fixed assets are located at various
leased locations in geographic areas served by the Company. The Company believes
that its existing properties are adequate to meet its anticipated needs in the
markets in which it has deployed or begun to deploy the DTI network and that
additional facilities are and will be available to meet its development and
expansion needs in existing and planned markets for the foreseeable future.
    
 
     The Company's executive, administrative and sales offices and its Network
Management Center are located at its principal office at 11111 Dorsett Road,
Maryland Heights, Missouri 63043, and its telephone number is (314) 253-6600.
The Company leases this space from Mr. Weinstein at market rates under an
agreement that expires on December 31, 1998. See "Certain Relationships and
Related Transactions."
 
EMPLOYEES
 
   
     At March 31, 1998, the Company had   full-time employees. None of the
Company's employees is represented by a union or covered by a collective
bargaining agreement. The Company believes its relations with its employees are
good. In connection with the construction and maintenance of its fiber optic
network, the Company uses third-party contractors, some of whose employees may
be represented by unions or covered by collective bargaining agreements.
    
 
LEGAL PROCEEDINGS
 
     On June 20, 1995, the Company and Mr. Weinstein were named as defendants in
a suit brought in the Circuit Court of St. Louis County, Missouri, in a matter
styled Alfred H. Frank v. Richard D. Weinstein and Digital Teleport, Inc. The
plaintiff alleges that (i) he entered into an oral contract with the defendants
pursuant to which he was to receive 40% of the Common Stock, (ii) he provided
services to DTI, for which he was not and should be compensated, and (iii) the
defendants misrepresented certain facts to the plaintiff in order to induce him
to loan money and provide services to the defendants. Based on these
allegations, the plaintiff is suing for breach of contract, quantum meruit and
fraud and is seeking actual monetary damages,
 
                                       69
<PAGE>   71
 
punitive damages and a percentage of the common stock of the Company. The
Company and Mr. Weinstein believe the plaintiff's claims are without merit and
intend to defend themselves vigorously.
 
     It is not possible to determine what impact, if any, an unfavorable outcome
in the Frank litigation would have on the financial condition, results of
operations or cash flows of the Company. Mr. Weinstein has agreed personally to
indemnify DTI against any and all losses resulting from any judgments and awards
rendered against the Company in this litigation. Mr. Weinstein has also agreed
personally to indemnify KLT against any and all losses resulting from any
judgments and awards rendered against the Company in this litigation and has
pledged his Common Stock in the Company in favor of KLT to secure such
obligation. See "Certain Relationships and Related Transactions."
 
     From time to time, the Company is named as a defendant in routine lawsuits
incidental to its business. Based on the information currently available, the
Company believes that none of such current proceedings, individually or in the
aggregate, will have a material adverse effect on the Company.
 
                                       70
<PAGE>   72
 
                                   MANAGEMENT
 
EXECUTIVE OFFICERS AND DIRECTORS
 
     The following table sets forth certain information concerning directors and
executive officers of the Company.
 
   
<TABLE>
<CAPTION>
               NAME                 AGE                    POSITION(S) WITH THE COMPANY
               ----                 ---                    ----------------------------
<S>                                 <C>   <C>
Richard D. Weinstein(1)...........  45    President, Chief Executive Officer and Secretary; Director
Gary W. Douglass..................  47    Senior Vice President and Chief Financial Officer
H.P. Scott........................  61    Senior Vice President
Jerry W. Murphy...................  40    Vice President, Network Operations
Jerome W. Sheehy..................  66    Vice President, Regulatory -- Industry Affairs; Director
Ronald G. Wasson(1)...............  53    Director
Bernard J. Beaudoin...............  57    Director
James V. O'Donnell................  47    Director
Kenneth V. Hager..................  46    Director
</TABLE>
    
 
- -------------------------
(1) Member of Compensation Committee
 
     RICHARD D. WEINSTEIN is President, Chief Executive Officer and Secretary of
the Company, which he founded in 1989. Prior to 1989, Mr. Weinstein owned and
managed Digital Teleresources, Inc., a firm which consulted, designed,
engineered and installed telecommunications systems. That company focused on
providing private microwave networks for ILEC bypass purposes to Fortune 500
companies such as General Dynamics, May Department Stores and Boatmen's
Bancshares (now NationsBank), as well as various cellular and health care firms.
In this capacity, Mr. Weinstein worked closely with SBC's deregulated marketing
subsidiary. Prior to 1984, Mr. Weinstein's consulting efforts were focused on
early wireless services, particularly paging and mobile telephone providers and
end users. Mr. Weinstein also owned and operated a distributor of Motorola
microwave equipment from 1986 to 1991.
 
   
     GARY W. DOUGLASS became the Chief Financial Officer and Senior Vice
President of DTI in July 1998. From March 1995 to December 1997, Mr. Douglass
was Executive Vice President and Chief Financial Officer of Roosevelt Financial
Group, Inc., a banking corporation that merged with Mercantile Bancorporation
Inc. in July 1997. Prior to joining Roosevelt Financial, Mr. Douglass was a
partner with Deloitte & Touche LLP, a "Big Six" international accounting firm
where he was in charge of the accounting and auditing function and financial
institution practice of the firm's St. Louis office.
    
 
   
     H.P. SCOTT joined the Company May 1998 as Senior Vice President. From May
1997 to May 1998, Mr. Scott was Vice President of Business Development of IXC
Carrier, Inc. ("IXC Carrier") of Austin, Texas. From May 1996 to May 1997, Mr.
Scott was Vice President of Engineering and Construction of IXC Carrier, and
from June 1993 to November 1995, Mr. Scott was Vice President of Engineering and
Construction with MCI, with which Mr. Scott had spent over 15 years in positions
of senior responsibility for the design and construction of MCI's coast-to-coast
fiber optic telecommunications networks. Prior to joining MCI, Mr. Scott spent
20 years with Collins Radio and Microwave Associates.
    
 
   
     JERRY W. MURPHY, became Vice President, Network Operations, in June 1998.
From October 1996 to December 1997, Mr. Murphy was the Director of Construction
Support of MCImetro Access Transmission Services, Inc., a wholly owned
subsidiary of MCI ("MCImetro"). Mr. Murphy was MCImetro's Director of
Engineering and Construction from January 1995 to October 1996, and was Vice
President of Engineering and Construction of Advanced Transmissions Systems,
Inc., a wholly owned subsidiary of MCI, from January 1990 to January 1995. Prior
to such time, Mr. Murphy spent over 10 years with MCI in various engineering,
network implementation and network operations positions.
    
 
     JEROME W. SHEEHY has been the Company's Vice President,
Regulatory -- Industry Affairs, since November 1997 and Vice President,
Inter-Carrier Support, from February 1997 to November 1997. Mr. Sheehy has also
been a director of DTI since September 1997. Prior to joining DTI, Mr. Sheehy
was
 
                                       71
<PAGE>   73
 
employed in the telecommunications industry for 42 years, of which 20 years were
spent with GTE in many capacities including installation, sales, public
relations, manager of carrier markets support.
 
   
     RONALD G. WASSON has been a director of DTI since March 1997. He is
currently President and Director of KLT Inc., a wholly owned subsidiary of
Kansas City Power & Light Company. He is also President of KLT Gas and KLT
Telecom Inc., and serves as director of KLT Power and KLT Energy Services, all
of which are subsidiaries of KLT Inc. Mr. Wasson joined KCPL in 1966 as Power
Sales Engineer and held various positions in marketing, engineering, corporate
planning and economic controls until 1977. After working briefly for R.W. Beck
and Associates as a Principal Engineer, he rejoined KCPL in 1979 in the
Operational Analysis and Development Department as a Management Analyst. In
1980, he was appointed Manager of Fossil Fuels, became Vice President of
Purchasing in 1983, Vice President of Administrative Services in 1986 and Senior
Vice President of Administration and Technical Services in 1991. Effective
January 1995, he transferred to KLT Inc. as Executive Vice President until he
was named to his current position as President in November 1996. Mr. Wasson also
serves on the Board of Directors of Junior Achievement of Mid-America and the
Board of Governors for the American Royal Association in Kansas City, Missouri.
    
 
     BERNARD J. BEAUDOIN has been a director of DTI since October 1997. He is
currently the Executive Vice President and Chief Financial Officer of KCPL. KLT
is an indirect wholly owned subsidiary of KCPL. Mr. Beaudoin joined KCPL in 1980
as Manager of Corporate Planning. Previously he was with the New England
Electric System, where he was Director of Economic Planning. At KCPL, he was
named director of Corporate Planning and Finance in 1983 and promoted to Vice
President of Finance in 1984. He became Chief Financial Officer in 1989, Senior
Vice President in 1991 and Senior Vice President -- Finance and Business
Development in 1994. Effective January 1995, he transferred to full-time KLT
Inc. employment as President. He was named to his current position with KCPL in
1996. Mr. Beaudoin also serves as Chairman of the Board of Directors of
Carondelet Health, a holding company for a variety of health provider services.
 
   
     JAMES V. O'DONNELL has been a director of DTI since November 1997. Since
1988, he has been the President of Bush-O'Donnell & Co., Inc., a funds
management and investment banking firm. Prior to 1988, Mr. O'Donnell served as a
Vice President of Goldman, Sachs & Co. Mr. O'Donnell serves as Chairman of the
Board of The Benjamin Ansehl Company of St. Louis and as President of National
Automobile and Casualty Insurance Company of Pasadena, California. He is also a
director of certain privately held companies and serves on the Board of Trustees
of Washington University in St. Louis.
    
 
     KENNETH V. HAGER has been a director of DTI since November 1997. Mr. Hager
has been employed by DST Systems, Inc. since 1988 and is currently its Vice
President, Chief Financial Officer and Treasurer. DST Systems, Inc. is a
provider of information processing and computer software services and products,
primarily to mutual funds, insurance companies, banks and other financial
services organizations. Since 1980, Mr. Hager has been a member of the Board of
Directors of the American Cancer Society -- Kansas City Unit, and is the current
Chairman of the Society's Metropolitan Kansas City Coordinating Council. Mr.
Hager also serves on the Board of Directors of the Greater Kansas City Sports
Commission and is a member of the Accounting and Information Systems Advisory
Council for the University of Kansas School of Business.
 
     Officers are elected by and serve at the discretion of the Board of
Directors. There are no family relationships among the directors and executive
officers of the Company.
 
     The Board of Directors has a Compensation Committee comprised of Messrs.
Wasson (Chairman) and Weinstein.
 
     A Shareholders' Agreement, as amended (the "Shareholders' Agreement"),
dated as of March 12, 1997 among the Company, Mr. Weinstein and KLT, provides
for a Board of Directors consisting of six directors, at least two of whom must
not be affiliated with either the Company or KLT, and Mr. Weinstein and KLT will
each have the right to designate three directors. At the present time there are
no vacancies. Mr. Weinstein has served as a director since the formation of the
Company in June 1989. Messrs. Wasson and Sheehy have served as directors since
March 1997 and September, 1997, respectively. Mr. Beaudoin has served as a
director since October 1997. Messrs. O'Donnell and Hager have served as
directors since November 1997.
 
                                       72
<PAGE>   74
 
The current directors have been elected to serve until the expiration of the
term to which he has been elected and until their respective successors are
elected and qualified or until the earlier of their death, resignation or
removal.
 
   
     Pursuant to the Shareholders' Agreement, Messrs. O'Donnell and Hager, as
directors who are not affiliates (as defined in the Shareholders' Agreement and
as set forth in the Glossary included as Annex A hereto) of either Mr.
Weinstein, the Company or KLT are paid a $20,000 annual retainer fee payable in
quarterly installments. All directors are reimbursed for expenses incurred in
connection with attending Board and committee meetings. The Company has also
granted options to purchase 150,000 shares under the Plan to each of Messrs.
O'Donnell and Hager, its non-affiliated directors.
    
 
EXECUTIVE COMPENSATION
 
     The following table sets forth certain summary information for the fiscal
years ended June 30, 1997 and 1996 concerning the compensation earned by the
Chief Executive Officer during such fiscal years for services in all capacities.
 
                           SUMMARY COMPENSATION TABLE
 
<TABLE>
<CAPTION>
                                                                                 LONG-TERM
                                                                                COMPENSATION
                                                                                ------------
                                          ANNUAL COMPENSATION    OTHER ANNUAL    SECURITIES     ALL OTHER
            NAME AND                      --------------------   COMPENSATION    UNDERLYING    COMPENSATION
       PRINCIPAL POSITION          YEAR   SALARY($)   BONUS($)       ($)         OPTIONS(#)        ($)
       ------------------          ----   ---------   --------   ------------    ----------    ------------
<S>                                <C>    <C>         <C>        <C>            <C>            <C>
Richard D. Weinstein,............  1997    $69,231       --           --             --             --
President, Chief Executive         1996         --       --           --             --             --
  Officer and Secretary            1995         --       --           --             --             --
</TABLE>
 
   
EMPLOYMENT AND CONSULTING AGREEMENTS
    
 
   
     Weinstein Employment Agreement. As a condition of the KLT Investment, the
Company and Mr. Weinstein entered into an employment agreement (the "Weinstein
Employment Agreement"), which provides that Mr. Weinstein will serve as the
Company's President and Chief Executive Officer and in such other capacities as
the Board may determine through January 1, 2000. For the duration of the lease
of the Company's headquarters entered into as of December 31, 1996 by and among
Mr. Weinstein, his wife and the Company (as amended, the "Lease Agreement"), Mr.
Weinstein will be compensated at the rate of $150,000 per year (which is in
addition to payments made to Mr. Weinstein under the Lease Agreement), and
$200,000 per year after the termination of such Lease Agreement, in addition to
group health or other benefits generally provided to other Company employees.
The Weinstein Employment Agreement may be terminated in connection with the
disability of Mr. Weinstein, for "cause" as defined therein or by either party
upon 90 days prior written notice; provided that if the Weinstein Employment
Agreement is terminated by the Company upon 90 days notice to Mr. Weinstein, Mr.
Weinstein shall thereafter receive his annual base salary for the remainder of
the employment period (but no Company-paid medical or other benefits), offset by
any compensation received by Mr. Weinstein if and when he obtains subsequent
employment. During its term and for two years thereafter, the Weinstein
Employment Agreement restricts the ability of Mr. Weinstein to compete with the
Company as an employee of or investor in another company in the Midwest region.
The Weinstein Employment Agreement also imposes on Mr. Weinstein certain
non-solicitation restrictions with respect to Company employees, customers and
clients. Unless extended by mutual agreement of the parties thereto, the Lease
Agreement will terminate on December 31, 1998.
    
 
   
     Scott Consulting Agreement. In May 1998, the Company and Mr. H.P. Scott
entered into a consulting agreement (the "Scott Agreement"), which provides that
Mr. Scott will serve as a Senior Vice President of the Company for a term of one
year, providing such consulting services as the Company requests, in the areas
of carrier's carrier sales, fiber swaps and any other services as mutually
agreed. For the duration of the Scott Agreement, Mr. Scott will be compensated
at a rate of $800 per day for such consulting services, and currently the
Company and Mr. Scott expect that he will spend approximately 15 days per month
providing such services, though neither he nor the Company is obligated by such
expectation.
    
 
                                       73
<PAGE>   75
 
   
     Mr. Scott also will receive a commission equal to the following: (i) 1% of
any cash payments received for sales of dark fiber to telecommunications
companies, which payments are within five (5) years of the completion of the
term of the Scott Agreement (ii) $200 per route mile of dark fiber received by
the Company pursuant to a swap for dark fiber owned by the Company; (iii) 1% of
any cash payments received by the Company from sales of lighted bandwidth
capacity at a rate of DS-3 or above to telecommunications companies, which
payments are within five (5) years of the completion of such term; and (iv) 1%
of the value of any bandwidth received by the Company in exchange for bandwidth
capacity at a rate of DS-3 or above of the Company, which commission shall be
paid for up to five years following the completion of such term, reduced on a
pro rata basis by any cash paid by the Company pursuant to such exchange. Mr.
Scott may elect, in his sole discretion, to receive up to 50% of any such
commission in the form of Common Stock at fair market value. Upon execution of
the Scott Agreement, the Company paid Mr. Scott $100,000, and he is eligible for
reimbursement of certain expenses.
    
 
   
     The Scott Agreement restricts the ability of Mr. Scott to compete with the
Company during the term thereof and for up to one year thereafter as a
principal, employee, partner or consultant in any region in which the Company
does business at such time. The Scott Agreement also imposes on Mr. Scott
certain confidentiality obligations and proprietary and non-solicitation
restrictions with respect to Company employees, customers and clients.
    
 
INCENTIVE AWARD PLAN
 
   
     The Company's 1997 Long-Term Incentive Award Plan (the "Plan") was adopted
by the Company's Board of Directors in December 1997. A total of 3,000,000
shares of Common Stock of the Company have been reserved for issuance under the
Plan. The Company has granted or is obligated to grant options to purchase an
aggregate of 425,000 shares of Common Stock to certain of its key employees at
an exercise price equal to the fair market value of the Common Stock on the
applicable date of grant. The Company also has granted options to purchase
150,000 shares of Common Stock to each of the Company's non-affiliated directors
(i.e., Messrs. O'Donnell and Hager) at an exercise price equal to the fair
market value of the Common Stock on the date of grant. No other options or other
awards are outstanding under the Plan. The Plan will terminate in December 2007,
unless sooner terminated by the Board of Directors.
    
 
   
     The Plan provides for grants of "incentive stock options," within the
meaning of Section 422 of the Internal Revenue Code of 1986, as amended, to
employees (including employee directors) and grants of nonqualified options to
employees and directors. The Plan also allows for the grant of stock
appreciation rights, restricted shares and performance shares to employees. The
Plan is administered by a committee designated by the Board of Directors.
Messrs. Wasson and Weinstein comprise the current committee. The exercise price
of incentive stock options granted under the Plan must not be less than the fair
market value of the Common Stock on the date of grant. With respect to any
optionee who owns stock representing more than 10% of the voting power of all
classes of the Company's outstanding capital stock, the exercise price of any
incentive stock option must be equal to at least 110% of the fair market value
of the Common Stock on the date of grant, and the term of the option must not
exceed five years. The terms of all other options may not exceed ten years. To
the extent that the aggregate fair market value of Common Stock (determined as
of the date of the option grant) for options which would otherwise be incentive
stock options may for the first time become exercisable by any individual in any
calendar year exceeds $100,000, such options shall be non-qualified stock
options.
    
 
                                       74
<PAGE>   76
 
                 CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS
 
     On December 31, 1996, Mr. Weinstein, Mr. Weinstein's wife and the Company
formalized a lease with respect to the principal executive offices of the
Company (the "Lease Agreement"). The lease pertains to 10,000 of the 14,400
square feet available in such building and provides for monthly lease payments
of $6,250, terminating on December 31, 1998. The Company believes that the terms
of the current Lease Agreement are comparable to those which would be available
to an unaffiliated entity on the basis of an arm's-length negotiation. The
Shareholders' Agreement also requires that if Mr. Weinstein proposes to build or
obtain ownership of a new building to house the operations of the Company, Mr.
Weinstein will first offer to the Company the opportunity to build or own such
building. If the Company declines to exercise this right, then the rent the
Company would pay for occupying such building would be 80% of the market
appraised rate for such space.
 
     Effective July 1996, the Company formed a joint venture with KLT to
develop, construct and operate a network in the Kansas City metropolitan area,
using in part the electrical duct system and certain other real estate owned by
KCPL and licensed to the joint venture. In March 1997, KLT became a strategic
investor in DTI when it entered into an agreement with DTI (the "KLT Agreement")
pursuant to which KLT committed to make an equity investment of up to $45.0
million in preferred stock of the Company. On March 12, 1997, pursuant to the
KLT Agreement, the Company issued 15,100 shares of Series A Preferred Stock to
KLT in exchange for the retirement of the then-outstanding indebtedness of the
Company to KLT, KLT's interest in the joint venture and cash, which
consideration was valued in the aggregate at approximately $21.9 million, net of
transactions costs. In June 1997, DTI issued an additional 3,400 shares of
Series A Preferred Stock to KLT for a cash payment of $5.1 million. In September
and October 1997, DTI issued the remaining 11,500 shares of Series A Preferred
Stock to KLT for aggregate cash payments of approximately $17.3 million. See
Note 13 of the notes to the consolidated financial statements and Note 7 of the
notes to the unaudited consolidated financial statements. Each share of Series A
Preferred Stock of the Company is entitled to the number of votes equal to the
number of shares into which such share of Series A Preferred Stock is
convertible with respect to any and all matters presented to the stockholders of
the Company for their action or consideration. Except for any amendments
affecting the rights and obligations of holders of Series A Preferred Stock,
with respect to which such holders vote separately as a class, or as otherwise
provided by law, holders of Series A Preferred Stock vote together with the
holders of the Common Stock as a single class. Pursuant to the KLT Agreement,
KLT has the right of first offer concerning energy services rights and contracts
involving DTI. In connection with the issuance of the Series A Preferred Stock,
Mr. Weinstein has guaranteed to KLT the performance by the Company of its
obligations under the KLT Agreement, including without limitation,
representations and warranties under such agreement. Mr. Weinstein has pledged
his Common Stock to secure such guarantee. Such obligations to KLT are
subordinated to Mr. Weinstein's obligations to hold the Company and KLT harmless
for any losses resulting from judgments and awards rendered against Digital
Teleport or the Company in the matter of Alfred H. Frank v. Richard D. Weinstein
and Digital Teleport, Inc. See "Business -- Legal Proceedings." Mr. Weinstein
has pledged his shares of Common Stock to KLT, which has agreed to reimburse the
Company and Digital Teleport for losses incurred by them in connection with the
Frank litigation to the extent of any proceeds KLT receives from Weinstein
pursuant to such pledge, less KLT's costs in pursuing such claim against
Weinstein. KLT has also agreed to bear one-half of any such losses. After such
claims related to the Frank litigation are resolved, KLT may exercise on the
pledge of Weinstein's shares to fulfill any amounts owing to KLT pursuant to
Weinstein's guarantee of the Company's obligations under the KLT Agreement. Mr.
Beaudoin is the Executive Vice President and Chief Financial Officer of KCPL.
Mr. Wasson is the President and a director of KLT Inc., a wholly owned
subsidiary of KCPL and parent corporation of KLT.
 
                                       75
<PAGE>   77
 
                             PRINCIPAL STOCKHOLDERS
 
     The following table sets forth certain information regarding the beneficial
ownership of the outstanding Common Stock of DTI as of March 31, 1998 by each
person or entity who is known by the Company to beneficially own 5% or more of
the Common Stock, which includes the Company's President and Chief Executive
Officer, each of the Company's directors and all of the Company's directors and
executive officers as a group.
 
   
<TABLE>
<CAPTION>
                                                              NUMBER OF SHARES     PERCENT OF
                                                                BENEFICIALLY      COMMON STOCK
                  NAME OF BENEFICIAL OWNER                         OWNED         OUTSTANDING(A)
                  ------------------------                    ----------------   --------------
<S>                                                           <C>                <C>
Richard D. Weinstein........................................     30,000,000            50.0%
  11111 Dorsett Road
  Maryland Heights, Missouri 63043
KLT Telecom Inc.............................................     30,000,000            50.0%
  1201 Walnut Avenue
  Kansas City, Missouri 64141
Ronald G. Wasson(b).........................................     30,000,000            50.0%
Bernard J. Beaudoin(b)......................................     30,000,000            50.0%
James V. O'Donnell..........................................             --              --
Jerome W. Sheehy............................................             --              --
Kenneth V. Hager............................................             --              --
Directors and executive officers as a group (8 persons).....     60,000,000           100.0%
</TABLE>
    
 
- -------------------------
   
(a) Reflects Common Stock outstanding after giving effect to the conversion of
    all outstanding shares of the Series A Preferred Stock into Common Stock.
    KLT owns 30,000 shares of the Series A Preferred Stock, which constitutes
    100% of such stock. Each such share of Series A Preferred Stock is
    convertible into 1,000 shares of Common Stock of the Company.
    
 
   
(b) All of the shares shown as owned by each of Messrs. Wasson and Beaudoin are
    the shares of Series A Preferred Stock owned by KLT. Each of Messrs. Wasson
    and Beaudoin disclaims beneficial ownership of such shares held by KLT.
    
 
   
     KLT owns 100% of the Series A Preferred Stock. Except for any amendment
affecting the rights and obligations of holders of Series A Preferred Stock or
as otherwise provided by law, holders of Series A Preferred Stock vote together
with the holders of Common Stock as a single class. The holders of the Series A
Preferred Stock vote separately as a class with respect to any amendment
affecting the rights and obligations of holders of Series A Preferred Stock and
as otherwise required by law.
    
 
                                       76
<PAGE>   78
 
                            DESCRIPTION OF THE NOTES
 
   
     The Private Notes were, and the Exchange Notes will be, issued under the
Indenture dated as of February 23, 1998 between the Company, as issuer, and The
Bank of New York, as trustee (the "Trustee"). Upon the issuance of the Exchange
Notes, the Indenture will be subject to the Trust Indenture Act of 1939, as
amended (the "TIA"). The following summary of certain provisions of the Exchange
Notes and the Indenture does not purport to be complete and is subject to, and
qualified in its entirety by reference to, the provisions of the Exchange Notes
and the Indenture, including the definitions of certain terms contained therein
and those terms made part of the Indenture through the incorporation by
reference of the TIA. The Indenture has been filed as an exhibit to the
Registration Statement, of which this Prospectus is a part, and copies of the
Indenture are available upon request from the Company or the Trustee. For
definitions of certain capitalized terms used in this summary, see "-- Certain
Definitions" below.
    
 
GENERAL
 
     The Exchange Notes will be general unsecured obligations of the Company,
limited to $506,000,000 aggregate principal amount at maturity, and will mature
on March 1, 2008. The Exchange Notes will be issued only in fully registered
form, without coupons, in denominations of $1,000 principal amount at maturity
and integral multiples thereof. The issue price of the Private Notes (for
purposes of calculating Accreted Value) was $543.92 per $1,000 principal amount
at maturity of the Private Notes. Payments in respect of the Exchange Notes will
be made, and the Exchange Notes will be transferable, at the office or agency of
the Company in The City of New York maintained for such purposes (which
initially will be the office of the Trustee located at 101 Barclay Street, New
York, New York 10286). See "Book-Entry: Delivery and Form." No service charge
will be made for any transfer, exchange or redemption of Exchange Notes, except
in certain circumstances for any tax or other governmental charge that may be
imposed in connection therewith. (Sections 202 and 305)
 
INTEREST
 
   
     The Exchange Notes will be issued at a substantial discount from their
principal amount at maturity. Although for federal income tax purposes a
significant amount of original interest discount, taxable as ordinary income,
will be recognized by a holder as such discount accrues from the date of the
Indenture, no cash interest will accrue or be payable on the Exchange Notes
prior to March 1, 2003. Thereafter, cash interest on the Exchange Notes will
accrue at the rate of 12 1/2% per annum and will be payable in cash semiannually
in arrears on March 1 and September 1 of each year (each an "Interest Payment
Date"), commencing September 1, 2003, to holders of record of Exchange Notes on
the February 15 and August 15 immediately preceding such Interest Payment Date.
The cash interest payable on each Interest Payment Date will be calculated from
the most recent Interest Payment Date to which cash interest has been paid or
duly provided for or, if no cash interest has been paid or duly provided for,
from March 1, 2003. Based on the foregoing, the yield to maturity of each
Exchange Note will be 12 1/2% (computed on a semiannual bond equivalent basis,
without giving effect to any allocation of net proceeds of the Private Offering
to the Warrants). Interest will be computed on the basis of a 360-day year
comprised of twelve 30-day months. If the Company defaults on any payment of
principal, whether at maturity, redemption or otherwise, interest will continue
to accrue and, to the extent permitted by law, cash interest will accrue on
overdue installments of interest at the rate of interest borne by the Notes.
(Sections 301, 307 and 310)
    
 
     The circumstances under which the Company may be required to pay additional
interest in cash on the Private Notes are described above under "The Exchange
Offer -- Purpose and Effect of the Exchange Offer."
 
RANKING
 
   
     The Indebtedness evidenced by the Exchange Notes will rank pari passu in
right of payment with all other future unsecured senior indebtedness of the
Company and senior in right of payment to all existing and future obligations of
the Company expressly subordinated in right of payment to the Exchange Notes. As
of March 31, 1998, the Company had approximately $268.9 million of indebtedness
outstanding, all of which was
    
 
                                       77
<PAGE>   79
 
   
represented by the Private Notes. Subject to certain limitations, the Company
and its Restricted Subsidiaries may incur additional Indebtedness in the future,
including secured Indebtedness. See "Risk Factors -- High Leverage; Ability to
Service Indebtedness; Restrictive Covenants" and "-- Holding Company Structure;
Priority of Secured Debt."
    
 
   
     The Company is a holding company with no direct operations and no
significant assets other than the stock of Digital Teleport. The Company will be
dependent on the cash flow of Digital Teleport to meet its obligations,
including the payment of interest and principal on the Exchange Notes. Subject
to the Indenture provisions that limit restrictions on the ability of any of the
Company's Restricted Subsidiaries to pay dividends and make other payments to
the Company, future debt instruments of Digital Teleport may impose significant
restrictions that may affect, among other things, the ability of Digital
Teleport to pay dividends or make loans, advances or other distributions to the
Company. The ability of Digital Teleport to pay dividends and make other
distributions also will be subject to, among other things, applicable state laws
and regulations. There can be no assurance that Digital Teleport will be able to
pay, or will generate sufficient earnings or cash flow to distribute, any cash
dividends or make any loans, advances or other payments of funds to the Company,
the failure of which would have a material adverse effect on the Company's
ability to meet its obligations on the Exchange Notes. See "-- Certain Covenants
- -- Limitations on Dividends and Other Payment Restrictions Affecting Restricted
Subsidiaries."
    
 
   
     Digital Teleport is a separate legal entity that has no obligation to pay
any amounts due pursuant to the Notes or to make any funds available therefor,
whether by dividends, loans or other payments. Because Digital Teleport will not
guarantee the payment of the principal or interest on the Exchange Notes, any
right of the Company to receive assets of Digital Teleport upon its liquidation
or reorganization (and the consequent right of holders of the Exchange Notes to
participate in the distribution or realize proceeds from those assets) will be
effectively subordinated to the claims of the creditors of Digital Teleport
(including trade creditors and holders of indebtedness of such subsidiary),
except if and to the extent the Company is itself a creditor of Digital
Teleport, in which case the claims of the Company would still be effectively
subordinated to any security interest in the assets of Digital Teleport held by
other creditors. As of March 31, 1998, Digital Teleport had aggregate
liabilities of approximately $21.1 million, including approximately $14.4
million of deferred revenues. Subject to certain limitations, the Company and
its Restricted Subsidiaries may incur additional Indebtedness in the future. For
a discussion of certain adverse consequences of the Company being a holding
company and of the terms and certain existing and potential future indebtedness
of the Company and its subsidiaries, see "Risk Factors -- Holding Company
Structure; Priority of Secured Debt."
    
 
SINKING FUND
 
     The Exchange Notes will not be entitled to the benefit of any sinking fund.
 
REDEMPTION
 
     The Exchange Notes will be redeemable, at the option of the Company, as a
whole or from time to time in part, at any time on or after March 1, 2003 on not
less than 30 nor more than 60 days' prior notice at the redemption prices
(expressed as percentages of principal amount at maturity) set forth below,
together with accrued interest, if any, to the redemption date, if redeemed
during the 12-month period beginning on March 1 of the years indicated below
(subject to the right of holders of record on relevant record dates to receive
interest due on a relevant Interest Payment Date):
 
<TABLE>
<CAPTION>
                                                              REDEMPTION
YEAR                                                            PRICE
- ----                                                          ----------
<S>                                                           <C>
2003........................................................    106.25%
2004........................................................    104.17
2005........................................................    102.08
2006 and thereafter.........................................    100.00
</TABLE>
 
   
(Sections 1101, 1102)
    
 
                                       78
<PAGE>   80
 
     At any time or from time to time on or prior to March 1, 2001 the Company
may redeem within 60 days of one or more Public Equity Offerings up to 33 1/3%
of the aggregate principal amount at maturity of the originally issued Notes
with the net proceeds of such offering at a redemption price equal to 112.5% of
the Accreted Value (determined at the redemption date); provided that
immediately after giving effect to any such redemption, at least 66 2/3% of the
aggregate principal amount at maturity of the originally issued Notes remains
outstanding. (Section 1102)
 
     If less than all the Notes are to be redeemed, the particular Notes to be
redeemed will be selected not more than 60 days prior to the redemption date by
the Trustee by such method as the Trustee will deem fair and appropriate;
provided, however, that no such partial redemption will reduce the principal
amount at maturity of a Note not redeemed to less than $1,000. Notice of
redemption will be mailed, first-class postage prepaid, at least 30 but not more
than 60 days before the redemption date to each holder of Notes to be redeemed
at its registered address. On and after the redemption date, original issue
discount, on or prior to March 1, 2003, and cash interest, after March 1, 2003,
will cease to accrue on Notes or portions thereof called for redemption and
accepted for payment. (Sections 1103, 1104, 1106 and 1107)
 
CERTAIN COVENANTS
 
     The Indenture contains, among others, the following covenants:
 
     Limitation on Indebtedness. (a) The Company will not, and will not permit
any Restricted Subsidiary to, incur any Indebtedness (including any Acquired
Indebtedness) other than Permitted Indebtedness; provided that the Company may
Incur Indebtedness if and at the time of such incurrence (i) the Consolidated
Indebtedness to Consolidated Operating Cash Flow Ratio would have been less than
or equal to 5.5 to 1.0, for Indebtedness incurred on or prior to December 31,
2000, or less than or equal to 5.0 to 1.0, for Indebtedness incurred thereafter
and (ii) no Default or Event of Default shall have occurred and be continuing or
occurs as a consequence of the actions set forth in this covenant. (Section
1008)
 
     In making the foregoing calculation, (A) pro forma effect will be given to:
(i) the incurrence or repayment of any Indebtedness to be incurred or repaid on
the date of the incurrence of such Indebtedness and (ii) the acquisition
(whether by purchase, merger or otherwise) or disposition (whether by sale,
merger or otherwise) of any company, entity or business acquired or disposed of
by the Company or its Restricted Subsidiaries, as the case may be, since the
beginning of the Four Quarter Period (as defined under the "Consolidated
Indebtedness to Consolidated Operating Cash Flow Ratio" definition) through the
date of the incurrence of such Indebtedness (the "Reference Period"), as if it
had occurred on the first day of such Reference Period and (B) the aggregate
amount of Indebtedness outstanding as of the end of the Reference Period will be
deemed to include an amount of funds equal to the average daily balance of
Indebtedness outstanding during the Reference Period under any revolving credit
or similar facilities of the Company and its Restricted Subsidiaries. (Section
1008)
 
     For the purposes of determining compliance with this covenant, in the event
that an item of Indebtedness or any portion thereof meets the criteria of more
than one of the types of Indebtedness the Company and the Restricted
Subsidiaries are permitted to incur, the Company will have the right, in its
sole discretion, to classify such item of Indebtedness or portion thereof at the
time of its incurrence and will only be required to include the amount and type
of such Indebtedness or portion thereof under the clause permitting the
Indebtedness as so classified.
 
     Limitation on Restricted Payments. (a) The Company will not, and will not
permit any Restricted Subsidiary to, directly or indirectly, take any of the
following actions:
 
          (i) declare or pay any dividend on, or make any distribution to
     holders of, any shares of its Capital Stock (other than dividends or
     distributions payable solely in shares of its Qualified Capital Stock or in
     options, warrants or other rights to acquire such shares of Qualified
     Capital Stock);
 
                                       79
<PAGE>   81
 
          (ii) purchase, redeem or otherwise acquire or retire for value,
     directly or indirectly, any shares of its Capital Stock or any Capital
     Stock of any of its Affiliates (other than Capital Stock of any Wholly
     Owned Restricted Subsidiary) or any options, warrants or other rights to
     acquire such shares of Capital Stock;
 
          (iii) make any principal payment on, or repurchase, redeem, defease or
     otherwise acquire or retire for value, prior to any scheduled principal
     payment, sinking fund payment or maturity, any Subordinated Indebtedness;
 
          (iv) make any Investment (other than any Permitted Investment); or
 
          (v) declare or pay any dividend or distribution on any Capital Stock
     of any Restricted Subsidiary to any Person (other than any of its Wholly
     Owned Restricted Subsidiaries) other than pro rata dividends or
     distributions on a class of Voting Stock of any Restricted Subsidiary, the
     majority of which is owned by the Company or a Wholly Owned Restricted
     Subsidiary; provided that no Restricted Subsidiary shall declare or pay
     such pro rata dividends or distributions on its Voting Stock to any Person
     (other than the Company or a Wholly Owned Restricted Subsidiary) at a time
     when it has outstanding Indebtedness owed to the Company or another
     Restricted Subsidiary;
 
(such payments or other actions described in (but not excluded from) clauses (i)
through (v) are collectively referred to as "Restricted Payments"), unless at
the time of, and immediately after giving effect to, the proposed Restricted
Payment (the amount of any such Restricted Payment, if other than cash, as
determined by the Board of Directors, whose determination shall be conclusive
and evidenced by a Board Resolution), (1) no Default or Event of Default shall
have occurred and be continuing, (2) the Company could incur at least $1.00 of
additional Indebtedness (other than Permitted Indebtedness) pursuant to the
"Limitation on Indebtedness" covenant and (3) the aggregate amount of all
Restricted Payments declared or made after the date of the Indenture shall not
exceed the sum of:
 
          (A) the remainder of (x) cumulative Consolidated Operating Cash Flow
     of the Company during the period (taken as a single accounting period)
     beginning on the first day of the fiscal quarter of the Company beginning
     after the date of the Indenture and ending on the last day of the last full
     fiscal quarter immediately preceding the date of such Restricted Payment
     for which quarterly or annual consolidated financial statements of the
     Company are available minus (y) the product of 1.5 times cumulative
     Consolidated Interest Expense of the Company during such period; plus
 
          (B) the aggregate Net Cash Proceeds and fair market value of
     Telecommunications Assets or Voting Stock of a Person that becomes a
     Restricted Subsidiary the assets of which consist primarily of
     Telecommunications Assets received by the Company after the date of the
     Indenture as capital contributions or from the issuance or sale (other than
     to any Subsidiary) of shares of Qualified Capital Stock of the Company
     (including upon the exercise of options, warrants or rights) or warrants,
     options or rights to purchase shares of Qualified Capital Stock of the
     Company; plus
 
          (C) the aggregate Net Cash Proceeds and fair market value of
     Telecommunications Assets or Voting Stock of a Person that becomes a
     Restricted Subsidiary the assets of which consist primarily of
     Telecommunications Assets received by the Company after the date of the
     Indenture from the issuance or sale (other than to any Subsidiary) of debt
     securities or Redeemable Capital Stock that have been converted into or
     exchanged for Qualified Capital Stock of the Company, together with the
     aggregate Net Cash Proceeds and fair market value of Telecommunications
     Assets or Voting Stock of a Person that becomes a Restricted Subsidiary the
     assets of which consist primarily of Telecommunications Assets received by
     the Company at the time of such conversion or exchange; plus
 
          (D) to the extent not otherwise included in the Consolidated Operating
     Cash Flow of the Company, an amount equal to the sum of (i) the net
     reduction in Investments in any Person (other than Permitted Investments)
     resulting from the payment in cash of dividends, repayments of loans or
     advances or other transfers of assets, in each case to the Company or any
     Restricted Subsidiary after the date of the Indenture from such Person and
     (ii) the portion (proportionate to the Company's equity interest in such
     Subsidiary) of the fair market value of the net assets of any Unrestricted
     Subsidiary at the time such
 
                                       80
<PAGE>   82
 
     Unrestricted Subsidiary is designated a Restricted Subsidiary; provided,
     however, that in the case of (i) or (ii) above the foregoing sum shall not
     exceed the amount of Investments previously made (and treated as a
     Restricted Payment) by the Company or any Restricted Subsidiary in such
     Person or Unrestricted Subsidiary.
 
     (b) Notwithstanding paragraph (a) above, the Company and any Restricted
Subsidiary may take the following actions so long as (with respect to clauses
(ii), (iii), (iv) and (v) below) no Default or Event of Default shall have
occurred and be continuing:
 
          (i) the payment of any dividend within 60 days after the date of
     declaration thereof, if at such date of declaration such dividend would
     have complied with the provisions of paragraph (a) above and such payment
     will be deemed to have been paid on such date of declaration for purposes
     of the calculation required by paragraph (a) above;
 
          (ii) the purchase, redemption or other acquisition or retirement for
     value of any shares of Capital Stock of the Company, in exchange for, or
     out of the Net Cash Proceeds of a substantially concurrent issuance and
     sale (other than to a Restricted Subsidiary) of, shares of Qualified
     Capital Stock of the Company;
 
          (iii) the purchase, redemption, defeasance or other acquisition or
     retirement for value of any Subordinated Indebtedness in exchange for or
     out of the Net Cash Proceeds of a substantially concurrent issuance and
     sale (other than to a Restricted Subsidiary) of shares of Qualified Capital
     Stock of the Company;
 
          (iv) the purchase of any Subordinated Indebtedness at a purchase price
     not greater than 101% of the principal amount thereof in the event of a
     Change of Control in accordance with provisions similar to the "Purchase of
     Notes upon a Change of Control" covenant; provided that prior to such
     purchase the Company has made the Change of Control Offer as provided in
     such covenant with respect to the Notes and has purchased all Notes validly
     tendered for payment in connection with such Change of Control Offer;
 
          (v) the purchase, redemption, defeasance or other acquisition or
     retirement for value of Subordinated Indebtedness in exchange for, or out
     of the net cash proceeds of a substantially concurrent incurrence (other
     than to a Subsidiary) of, new Subordinated Indebtedness so long as (A) the
     principal amount of such new Subordinated Indebtedness does not exceed the
     principal amount (or, if such Subordinated Indebtedness being refinanced
     provides for an amount less than the principal amount thereof to be due and
     payable upon a declaration of acceleration thereof, such lesser amount as
     of the date of determination) of the Subordinated Indebtedness being so
     purchased, redeemed, defeased, acquired or retired, plus the amount of any
     premium required to be paid in connection with such refinancing pursuant to
     the terms of such Subordinated Indebtedness being refinanced or the amount
     of any premium reasonably determined by the Company as necessary to
     accomplish such refinancing, plus, in either case, the amount of expenses
     of the Company incurred in connection with such refinancing; (B) such new
     Subordinated Indebtedness is subordinated to the Notes to the same extent
     as such Subordinated Indebtedness so purchased, redeemed, defeased,
     acquired or retired; and (C) such new Subordinated Indebtedness has an
     Average Life longer than the Average Life of the Notes and a final Stated
     Maturity of principal later than the final Stated Maturity of principal of
     the Notes; and
 
          (vi) the payment of cash in lieu of fractional shares of Common Stock
     pursuant to the Warrant Agreement.
 
The actions described in clauses (i), (ii), (iii), (iv) and (vi) of this
paragraph (b) shall be Restricted Payments that shall be permitted to be taken
in accordance with this paragraph (b) but shall reduce the amount that would
otherwise be available for Restricted Payments under clause (3) of paragraph (a)
and the actions described in clause (v) of this paragraph (b) shall be
Restricted Payments that shall be permitted to be taken in accordance with this
paragraph (b) and shall not reduce the amount that would otherwise be available
for Restricted Payments under clause (3) of paragraph (a) above. (Section 1009)
 
                                       81
<PAGE>   83
 
     Limitation on Issuances and Sales of Capital Stock of Restricted
Subsidiaries. The Company will not, and will not permit any Restricted
Subsidiary to, issue or sell any Capital Stock of a Restricted Subsidiary (other
than to the Company or a Wholly Owned Restricted Subsidiary); provided, however,
that this covenant shall not prohibit (i) the ownership by directors of
director's qualifying shares or the ownership by foreign nationals of Capital
Stock of any Restricted Subsidiary, to the extent mandated by applicable law;
(ii) issuances or sales of Capital Stock of a Restricted Subsidiary, if,
immediately after giving effect to such issuance or sale, such Restricted
Subsidiary would no longer be a Restricted Subsidiary and any Investment in such
Person remaining after giving effect to such issuance or sale would have been
permitted to be made under the "Limitation on Restricted Payments" covenant if
made on the date of such issuance and sale or (iii) the issuance and sale of
all, but not less than all, of the issued and outstanding Capital Stock of any
Restricted Subsidiary owned by the Company and the Restricted Subsidiaries in
compliance with the "Limitation on Sale of Assets" covenant. (Section 1010)
 
     Limitation on Transactions with Affiliates. The Company will not, and will
not permit any Restricted Subsidiary to, enter into or suffer to exist, directly
or indirectly, any transaction or series of related transactions (including,
without limitation, the sale, purchase, exchange or lease of assets, property or
services) with, or for the benefit of, any Affiliate of the Company or any
Restricted Subsidiary unless (i) such transaction or series of related
transactions are on terms that are no less favorable to the Company or such
Restricted Subsidiary, as the case may be, than those that could have been
obtained in an arm's length transaction with unrelated third parties who are not
Affiliates, (ii) with respect to any transaction or series of related
transactions involving aggregate consideration equal to or greater than $5.0
million (or, to the extent not denominated in United States dollars, the United
States Dollar Equivalent thereof), the Company will deliver an officers'
certificate to the Trustee certifying that such transaction or series of related
transactions complies with clause (i) above and (iii) with respect to any
transaction or series of related transactions involving aggregate consideration
in excess of $10.0 million (or, to the extent not denominated in United States
dollars, the United States Dollar Equivalent thereof), the Company shall deliver
the officers' certificate described in clause (ii) above which shall also
certify that such transaction or series of related transactions has been
approved by a majority of the Disinterested Directors of the Board of Directors,
or that the Company has obtained a written opinion from a nationally recognized
U.S. investment banking firm certifying that such transaction or series of
related transactions is fair to the Company or such Restricted Subsidiary, as
the case may be, from a financial point of view; provided, however, that this
provision will not restrict (1) any transaction or series of related
transactions among the Company and Wholly Owned Restricted Subsidiaries or among
Wholly Owned Restricted Subsidiaries, (2) Investments in Qualified Capital Stock
of the Company by any Person, including an Affiliate of the Company, (3) the
Company from paying reasonable and customary regular compensation and fees to
directors of the Company or any Restricted Subsidiary who are not employees of
the Company or any Restricted Subsidiary, (4) the making of any Restricted
Payment not prohibited by the "Limitation on Restricted Payments" covenant or
(5) any transaction or series of transactions in an aggregate amount of up to
$1.5 million. (Section 1011)
 
     Limitation on Liens. The Company will not, and will not permit any
Restricted Subsidiary to, directly or indirectly, create, incur, assume or
suffer to exist any Lien (other than Permitted Liens) on or with respect to any
of its property or assets, including any shares of stock or Indebtedness of any
Restricted Subsidiary, whether owned at the date of the Indenture or thereafter
acquired, or any income, profits or proceeds therefrom, or assign or otherwise
convey any right to receive income thereon, unless (x) in the case of any Lien
securing Subordinated Indebtedness, the Notes are secured by a Lien on such
property, assets or proceeds that is senior in priority to such Lien and (y) in
the case of any other Lien, the Notes are equally and ratably secured with the
obligation or liability secured by such Lien. (Section 1012)
 
     Limitation on Issuances of Guarantees of Indebtedness by Restricted
Subsidiaries. (a) The Company will not permit any Restricted Subsidiary,
directly or indirectly, to guarantee, assume or in any other manner become
liable with respect to any Indebtedness of the Company (the "Guaranteed
Indebtedness") unless (i) such Restricted Subsidiary simultaneously executes and
delivers a supplemental indenture providing for the guarantee (a "Subsidiary
Guarantee") of payment of the Notes by such Restricted Subsidiary; provided that
this paragraph (a) shall not be applicable to (x) any guarantee of any
Restricted Subsidiary that existed
 
                                       82
<PAGE>   84
 
at the time such Person became a Restricted Subsidiary and was not incurred in
connection with or in contemplation of such Person becoming a Restricted
Subsidiary or (y) any guarantee of any Restricted Subsidiary of Indebtedness
incurred pursuant to clause (j) under the "Permitted Indebtedness" definition.
If the Guaranteed Indebtedness is (A) pari passu in right of payment with the
Notes, then the guarantee of such Guaranteed Indebtedness shall be pari passu in
right of payment with, or subordinated in right of payment to, the Subsidiary
Guarantee or (B) subordinated in right of payment to the Notes, then the
guarantee of such Guaranteed Indebtedness shall be subordinated in right of
payment to the Subsidiary Guarantee at least to the extent that the Guaranteed
Indebtedness is subordinated in right of payment to the Notes.
 
     (b) Notwithstanding the foregoing, any Subsidiary Guarantee created
pursuant to the provisions described in the foregoing paragraph (a) will provide
by its terms that it will be automatically and unconditionally released and
discharged upon (i) any sale, exchange or transfer, to any Person who is not an
Affiliate of the Company, of all of the Company's Capital Stock in, or all or
substantially all the assets of, such Restricted Subsidiary (which sale,
exchange or transfer is not prohibited by the Indenture) or (ii) the release by
the holders of the Indebtedness of the Company described in the preceding
paragraph of their guarantee by such Restricted Subsidiary (including any deemed
release upon payment in full of all obligations under such Indebtedness, except
by or as a result of payment under such guarantee), at a time when (A) no other
Indebtedness of the Company has been guaranteed by such Restricted Subsidiary or
(B) the holders of all such other Indebtedness which is guaranteed by such
Restricted Subsidiary also release their guarantee by such Restricted Subsidiary
(including any deemed released upon payment in full of all obligations under
such Indebtedness). (Section 1013)
 
     Purchase of Notes upon a Change of Control. If a Change of Control shall
occur at any time, then the Company shall offer to purchase (the "Change of
Control Offer") from each holder of Notes all of such holder's Notes, in whole
or in part and in integral multiples of $1,000, at a purchase price (the "Change
of Control Purchase Price") in cash in an amount equal to (a) 101% of the
Accreted Value of the Notes as of the date of purchase (the "Change of Control
Purchase Date"), if such date is on or before March 1, 2003, and (b) 101% of the
principal amount at maturity of the Notes, plus accrued and unpaid cash
interest, if any, to the Change of Control Purchase Date, if such date is after
March 1, 2003 pursuant to the procedures described below and the other
procedures set forth in the Indenture.
 
     Within 15 days following any Change of Control, the Company shall notify
the Trustee thereof and give written notice of such Change of Control to each
holder of Notes by first-class mail, postage prepaid, at the address appearing
in the security register, stating, among other things, (i) the purchase price
and the purchase date, which shall be a Business Day no earlier than 30 days nor
later than 60 days from the date such notice is mailed, or such later date as is
necessary to comply with requirements under the Exchange Act or any applicable
securities laws or regulations; (ii) that any Note not tendered will continue to
accrete original issue discount and/or accrue interest, as the case may be;
(iii) that, unless the Company defaults in the payment of the purchase price,
any Notes accepted for payment pursuant to the Change of Control Offer shall
cease to accrete original issue discount and/or accrue interest, as the case may
be, after the Change of Control Purchase Date; and (iv) certain other procedures
that a holder of Notes must follow to accept a Change of Control Offer or to
withdraw such acceptance.
 
     If a Change of Control Offer is made, there can be no assurance that the
Company will have available funds sufficient to pay the Change of Control
Purchase Price for all of the Notes that might be delivered by holders of the
Notes seeking to accept the Change of Control Offer. The failure of the Company
to make or consummate the Change of Control Offer would result in an Event of
Default and would give the Trustee and the holders of the Notes the rights
described under "-- Events of Default."
 
     One of the events which constitutes a Change of Control under the Indenture
is the disposition of "all or substantially all" of the Company's assets. This
term has not been interpreted under New York law (which is the governing law of
the Indenture) to represent a specific quantitative test. As a consequence, in
the event holders of the Notes elect to require the Company to purchase the
Notes and the Company elects to contest such election, there can be no assurance
as to how a court interpreting New York law would interpret the phrase.
 
                                       83
<PAGE>   85
 
     The existence of a holder's right to require the Company to purchase such
holder's Notes upon a Change of Control may deter a third party from acquiring
the Company in a transaction which constitutes a Change of Control.
 
     The definition of "Change of Control" in the Indenture is limited in scope.
The provisions of the Indenture may not afford holders of Notes the right to
require the Company to purchase such Notes in the event of a highly leveraged
transaction or certain transactions with Company's management or its Affiliates,
including a reorganization, restructuring, merger or similar transaction
involving the Company (including, in certain circumstances, an acquisition of
the Company by management or its Affiliates) that may adversely affect holders
of the Notes, if such transaction is not a transaction defined as a Change of
Control. See "-- Certain Definitions" for the definition of "Change of Control."
A transaction involving the Company's management or its Affiliates, or a
transaction involving a recapitalization of the Company, would result in a
Change of Control if it is the type of transaction specified by such definition.
 
     The Company will comply with the applicable tender offer rules, including
Rule 14e-l under the Exchange Act, and any other applicable securities laws and
regulations in connection with a Change of Control Offer.
 
     The Company will not, and will not permit any Subsidiary to, create or
permit to exist or become effective any restriction (other than restrictions
existing under Indebtedness as in effect on the date of the Indenture) that
would materially impair its ability to make a Change of Control Offer to
purchase the Notes or, if such Change of Control Offer is made, to pay for the
Notes tendered for purchase. (Section 1014)
 
     Limitation on Sale of Assets. (a) The Company will not, and will not permit
any Restricted Subsidiary to, directly or indirectly, engage in any Asset Sale
unless (i) the consideration received by the Company or such Restricted
Subsidiary for such Asset Sale is not less than the fair market value of the
shares or assets sold (as determined by the Board of Directors, whose
determination shall be conclusive and evidenced by a Board Resolution) and (ii)
the consideration received by the Company or the relevant Restricted Subsidiary
in respect of such Asset Sale consists of at least 75% cash or Cash Equivalents.
 
     (b) If the Company or any Restricted Subsidiary engages in an Asset Sale,
the Company may use the Net Cash Proceeds thereof, within 12 months after such
Asset Sale, to (i) permanently repay or prepay any then outstanding senior
Indebtedness of the Company or Indebtedness of any Restricted Subsidiary or (ii)
invest (or enter into a legally binding agreement to invest) in properties and
assets to replace the properties and assets that were the subject of the Asset
Sale or in properties and assets that will be used in the businesses of the
Company or a Restricted Subsidiary, as the case may be, existing on the Original
Issue Date. If any such legally binding agreement to invest such Net Cash
Proceeds is terminated, then the Company may, within 60 days of such termination
or within 12 months of such Asset Sale, whichever is later, apply or invest such
Net Cash Proceeds as provided in clause (i) or (ii) (without regard to the
parenthetical contained in such clause (ii)) above. The amount of such Net Cash
Proceeds not so used as set forth above in this paragraph (b) constitutes
"Excess Proceeds."
 
     (c) When the aggregate amount of Excess Proceeds exceeds $10.0 million (or,
to the extent not denominated in United States dollars, the United States Dollar
Equivalent thereof), the Company will, within 15 business days, make an offer to
purchase (an "Excess Proceeds Offer") from all holders of Notes, on a pro rata
basis, in accordance with the procedures set forth below, the maximum principal
amount at maturity of Notes (expressed as a multiple of $1,000) that may be
purchased with the Excess Proceeds. The offer price as to each Note (the "Excess
Proceeds Offer Price") will be payable in cash in an amount equal to (a) 100% of
the Accreted Value of the Notes as of the purchase date, if such purchase date
is on or before March 1, 2003, and (b) 100% of the principal amount at maturity
of the Note, plus accrued and unpaid cash interest, if any, to the date of
purchase, if such purchase date is after March 1, 2003. To the extent that the
aggregate Excess Proceeds Offer Price of Notes tendered pursuant to an Excess
Proceeds Offer is less than the Excess Proceeds, the Company may use such
deficiency for general corporate purposes. If the aggregate Excess Proceeds
Offer Price of Notes validly tendered and not withdrawn by holders thereof
exceeds the Excess Proceeds, Notes to be purchased will be selected on a pro
rata basis. Upon completion of such offer to purchase, the amount of Excess
Proceeds shall be reset to zero. (Section 1015)
 
                                       84
<PAGE>   86
 
     Limitation on Dividends and Other Payment Restrictions Affecting Restricted
Subsidiaries. The Company will not, and will not permit any Restricted
Subsidiary to, directly or indirectly, create or otherwise cause or suffer to
exist or become effective any encumbrance or restriction of any kind on the
ability of any Restricted Subsidiary to (a) pay dividends, in cash or otherwise,
or make any other distributions on or in respect of its Capital Stock, (b) pay
any Indebtedness owed to the Company or any other Restricted Subsidiary, (c)
make Investments in the Company or any other Restricted Subsidiary, (d) transfer
any of its properties or assets to the Company or any other Restricted
Subsidiary or (e) guarantee any Indebtedness of the Company or any other
Restricted Subsidiary, except for such encumbrances or restrictions existing
under or by reason of (i) any agreement in effect on the date of the Indenture,
(ii) applicable law, (iii) customary non-assignment provisions of any lease
governing a leasehold interest of the Company or any Restricted Subsidiary, (iv)
any agreement or other instrument of a Person acquired by the Company or any
Restricted Subsidiary in existence at the time of such acquisition (but not
created in contemplation thereof), which encumbrance or restriction is not
applicable to any Person, or the properties or assets of any Person, other than
the Person, or the property or assets of the Person, so acquired, (v) the
refinancing of Indebtedness incurred under agreements existing on the date of
the Indenture, so long as such encumbrances or restrictions are no less
favorable in any material respect to the Company or any Restricted Subsidiary
than those contained in the respective agreement as in effect on the date of the
Indenture, (vi) restrictions contained in any security agreement (including a
capital lease obligation) securing Indebtedness of the Company or a Restricted
Subsidiary otherwise permitted under the Indenture, (vii) customary
nonassignment provisions entered into in the ordinary course of business in
leases and other agreements, (viii) any restriction with respect to a Restricted
Subsidiary of the Company entered into for the sale or disposition of all or
substantially all of the Capital Stock or assets of such Restricted Subsidiary
made in accordance with the "Limitation on Sales of Assets" covenant, (ix)
pursuant to the Indenture and the Notes or (x) any agreement or instrument
governing or relating to Indebtedness under any senior commercial bank facility
(each, a "Bank Facility") if such encumbrance or restriction applies only to (A)
amounts which at any point in time (other than during such periods as are
described in the following clause (B)) (1) exceed amounts due and payable (or
which are to become due and payable within 30 days) in respect of the Notes or
the Indenture for interest, premium and principal or (2) if paid, would result
in an event described in the following clause (B) of this sentence, or (B)
during the pendency of any event that causes, permits or, after notice or lapse
of time, would cause or permit the holder(s) of Indebtedness governed by such
Bank Facility to declare such Indebtedness to be immediately due and payable or
to require cash collateralization or cash cover for such Indebtedness for so
long as such cash collateralization or cash cover has not been provided.
(Section 1016)
 
     Limitation on Investments in Unrestricted Subsidiaries. The Company will
not, and will not permit any of its Restricted Subsidiaries to, make any
Investments in Unrestricted Subsidiaries if, at the time of such Investment, the
aggregate amount of such Investments would exceed the amount of Restricted
Payments then permitted to be made pursuant to the "Limitation on Restricted
Payments" covenant. Any Investment in an Unrestricted Subsidiary permitted to be
made pursuant to this covenant (i) will be treated as a Restricted Payment in
calculating the amount of Restricted Payments made by the Company or any
Restricted Subsidiary, without duplication, under the provisions of clause (iv)
of paragraph (a) of the "Limitation on Restricted Payments" covenant and (ii)
may be made in cash or property (if made in property, the fair market value
thereof as determined by the Company, whose determination will be conclusive)
and will be deemed to be the amount of such Investment for the purpose of clause
(i) of this covenant. (Section 1017)
 
     Limitation on Sale-Leaseback Transactions. The Company will not, and will
not permit any Restricted Subsidiary to, enter into any sale-leaseback
transaction involving any of its assets or properties whether now owned or
hereafter acquired, whereby the Company or a Restricted Subsidiary sells or
transfers such assets or properties and then or thereafter leases such assets or
properties or any part thereof or any other assets or properties which the
Company or such Restricted Subsidiary, as the case may be, intends to use for
substantially the same purpose or purposes as the assets or properties sold or
transferred.
 
     The foregoing restriction does not apply to any sale-leaseback transaction
if (i) the lease is for a period, including renewal rights, of not in excess of
three years; (ii) the lease secures or relates to industrial revenue or
pollution control bonds; (iii) the transaction is solely between the Company and
any Wholly Owned Restricted Subsidiary or solely between Wholly Owned Restricted
Subsidiaries; or (iv) the Company or such
 
                                       85
<PAGE>   87
 
Restricted Subsidiary, within 12 months after the sale or transfer of any assets
or properties is completed, applies an amount not less than the net proceeds
received from such sale in accordance with the "Limitation on Sale of Assets"
covenant. (Section 1018)
 
     Business of the Company. The Company will not, and will not permit any of
its Restricted Subsidiaries to, engage in any business activity other than (i)
the delivery of telephony or other telecommunications or data transmission
services in North America, (ii) telecommunications network construction services
and (iii) any business or activity reasonably related thereto, including,
without limitation, any business conducted by any Restricted Subsidiary on the
date of the Indenture and the acquisition, holding or exploitation of any
telecommunications licenses, permits, franchises or rights of way related to the
delivery of the services described in clause (i) above. (Section 1019)
 
     Provision of Financial Statements and Reports. After the consummation of
this Exchange Offer or the effectiveness of a Shelf Registration Statement, the
Company will file on a timely basis with the Commission, to the extent such
filings are accepted by the Commission and whether or not the Company has a
class of securities registered under the Exchange Act, the annual reports,
quarterly reports and other documents that the Company would be required to file
if it were subject to Section 13 or 15(d) of the Exchange Act. The Company will
also be required (i) to file with the Trustee, copies of such reports and
documents within 15 days after the date on which such reports and documents are
filed with the Commission or the date on which the Company would be required to
file such reports and documents if the Company were so required, and (ii)
provide to each holder of Notes, without cost to such holder, copies of such
reports and documents within 15 days after the filing thereof with the Trustee.
(Section 1020)
 
CONSOLIDATION, MERGER AND SALE OF ASSETS
 
     The Company will not, in a single transaction or a series of related
transactions, consolidate with or merge with or into any other Person or sell,
assign, convey, transfer, lease or otherwise dispose of all or substantially all
of its properties and assets substantially as an entirety to any other Person or
Persons or permit any Subsidiary to enter into any such transaction or series of
related transactions, if such transaction or series of related transactions, in
the aggregate, would result in the sale, assignment, conveyance, transfer, lease
or other disposition of all or substantially all of the properties and assets of
the Company and its Subsidiaries on a consolidated basis substantially as an
entirety to any Person or Persons, unless at the time and immediately after
giving effect thereto: (i) either (a) the Company will be the continuing
corporation or (b) the Person (if other than the Company) formed by such
consolidation or into which the Company or such Subsidiary is merged or the
Person which acquires by sale, conveyance, transfer, lease or other disposition,
all or substantially all of the properties and assets of the Company and its
Subsidiaries on a consolidated basis substantially as an entirety, as the case
may be (the "Surviving Entity"), (1) will be a corporation organized and validly
existing under the laws of the United States of America, any state thereof or
the District of Columbia and (2) will expressly assume, by a supplemental
indenture to the Indenture in form satisfactory to the Trustee, the Company's
obligation pursuant to the Notes for the due and punctual payment of the
principal (including accretion of original issue discount) of, premium, if any,
on and interest on all the Notes and the performance and observance of every
covenant of the Indenture on the part of the Company to be performed or
observed; (ii) immediately before and after giving effect to such transaction or
series of transactions on a pro forma basis (and treating any obligation of the
Company or any Subsidiary incurred in connection with or as a result of such
transaction or series of transactions as having been incurred at the time of
such transaction), no Default or Event of Default shall have occurred and be
continuing; (iii) immediately after giving effect to such transaction or series
of transactions on a pro forma basis (on the assumption that the transaction or
series of transactions occurred on the first day of the latest fiscal quarter
for which consolidated financial statements of the Company are available
immediately prior to the consummation of such transaction or series of
transactions with the appropriate adjustments with respect to the transaction or
series of transactions being included in such pro forma calculation), the
Company (or the Surviving Entity if the Company is not the continuing obligor
under the Indenture) could incur at least $1.00 of additional Indebtedness
(other than Permitted Indebtedness) under the provisions of the "Limitation on
Indebtedness" covenant; and (iv) if any of the property or assets of the Company
or any of its Subsidiaries would thereupon
 
                                       86
<PAGE>   88
 
become subject to any Lien, the provisions of the "Limitation on Liens" covenant
are complied with. (Section 801)
 
     In connection with any such consolidation, merger, sale, assignment,
conveyance, transfer, lease or other disposition, the Company or the Surviving
Entity shall have delivered to the Trustee, in form and substance reasonably
satisfactory to the Trustee, an officers' certificate and an opinion of counsel,
each stating that such consolidation, merger, sale, assignment, conveyance,
transfer, lease or other disposition, and if a supplemental indenture is
required in connection with such transaction, such supplemental indenture,
comply with the requirements of the Indenture and that all conditions precedent
therein provided for relating to such transaction have been complied with.
(Section 801)
 
     Upon any consolidation or merger, or any sale, assignment, conveyance,
transfer, lease or disposition of all of substantially all of the properties and
assets of the Company in accordance with the immediately preceding paragraphs in
which the Company is not the continuing obligor under the Indenture, the
Surviving Entity shall succeed to, and be substituted for, and may exercise
every right and power of, the Company under the Indenture with the same effect
as if such successor had been named as the Company therein. When a successor
assumes all the obligations of its predecessor under the Indenture, the
predecessor shall be released from those obligations; provided that in the case
of a transfer by lease, the predecessor shall not be released from the payment
of principal of, premium, if any, and interest on the Notes. (Section 802)
 
EVENTS OF DEFAULT
 
     The following are "Events of Default" under the Indenture:
 
          (i) default in the payment of any interest on any Note when it becomes
     due and payable and continuance of such default for a period of 30 days;
 
          (ii) default in the payment of the principal of or premium, if any, on
     any Note at its Maturity (upon acceleration, required purchase or
     otherwise);
 
          (iii) (A) default in the performance, or breach, of any covenant or
     agreement of the Company contained in the Indenture (other than a default
     in the performance, or breach, of a covenant or agreement which is
     specifically dealt with in the immediately preceding clauses (i) and (ii)
     or in clauses (B), (C) or (D) of this clause (iii)) and continuance of such
     default or breach for a period of 30 days after written notice shall have
     been given to the Company by the Trustee or to the Company and the Trustee
     by the holders of at least 25% in aggregate principal amount at maturity of
     the Notes then outstanding; (B) default in the performance or breach of the
     provisions of the "Limitation on Sale of Assets" covenant; (C) default in
     the performance or breach of the provisions of "-- Consolidation, Merger
     and Sale of Assets"; and (D) failure to make or consummate a Change of
     Control Offer in accordance with the provisions of the "Purchase of Notes
     upon a Change of Control" covenant;
 
          (iv) (A) one or more defaults in the payment of principal of or
     premium, if any, or interest on Indebtedness of the Company or any
     Significant Subsidiary aggregating $7.5 million or more (or, to the extent
     not denominated in United States dollars, the United States Dollar
     Equivalent thereof), when the same becomes due and payable at the stated
     maturity thereof, and such default or defaults shall have continued after
     any applicable grace period and shall not have been cured or waived or (B)
     Indebtedness of the Company or any Significant Subsidiary aggregating $7.5
     million or more (or, to the extent not denominated in United States
     dollars, the United States Dollar Equivalent thereof) shall have been
     accelerated or otherwise declared due and payable, or required to be
     prepaid or repurchased (other than by regularly scheduled required
     prepayment), prior to the Stated Maturity thereof;
 
          (v) one or more final judgments, orders or decrees of any court or
     regulatory agency shall be rendered against the Company or any Significant
     Subsidiary or their respective properties for the payment of money, either
     individually or in an aggregate amount, in excess of $7.5 million (or, to
     the extent not denominated in United States dollars, the United States
     Dollar Equivalent thereof) and either (A) an enforcement proceeding shall
     have been commenced by any creditor upon such judgment or
 
                                       87
<PAGE>   89
 
     order or (B) there shall have been a period of 30 days during which a stay
     of enforcement of such judgment or order, by reason of a pending appeal or
     otherwise, was not in effect; or
 
          (vi) the occurrence of certain events of bankruptcy, insolvency or
     reorganization with respect to the Company or any Significant Subsidiary.
 
     If an Event of Default (other than an Event of Default arising from an
event of bankruptcy, insolvency or reorganization with respect to the Company or
any Significant Subsidiary) occurs and is continuing, the Trustee or the holders
of not less than 25% in aggregate principal amount at maturity of the Notes then
outstanding, by written notice to the Company (and to the Trustee if such notice
is given by the holders), may, and the Trustee upon the written request of such
holders shall, declare the Accreted Value of, premium, if any, and accrued
interest on all outstanding Notes immediately due and payable, and upon any such
declaration all such amounts payable in respect of the Notes shall become
immediately due and payable. If an Event of Default specified in clause (vi)
above occurs and is continuing, then the Accreted Value of, premium, if any, and
accrued interest on all of the outstanding Notes will ipso facto become
immediately due and payable without any declaration or other act on the part of
the Trustee or any holder of Notes. (Section 502)
 
     At any time after a declaration of acceleration under the Indenture, but
before a judgment or decree for payment of the money due has been obtained by
the Trustee, the holders of a majority in aggregate principal amount at Maturity
of the outstanding Notes, by written notice to the Company and the Trustee, may
rescind such declaration and its consequences if (a) the Company has paid or
deposited with the Trustee a sum sufficient to pay (i) all overdue interest on
all outstanding Notes, (ii) the Accreted Value of and premium, if any, on any
outstanding Notes that have become due otherwise than by such declaration of
acceleration and interest thereon at the rate borne by the Notes, (iii) to the
extent that payment of such interest is lawful, interest upon overdue interest
and overdue principal at the rate borne by the Notes, and (iv) all sums paid or
advanced by the Trustee under the Indenture and the reasonable compensation,
expenses, disbursements and advances of the Trustee, its agents and counsel; and
(b) all Events of Default, other than the non-payment of amounts of principal
of, premium, if any, or interest on the Notes that have become due solely by
such declaration of acceleration, have been cured or waived. No such rescission
shall affect any subsequent default or impair any right consequent thereon.
 
     Notwithstanding the preceding paragraph, in the event of a declaration of
acceleration in respect of the Notes because of an Event of Default specified in
subparagraph (iv)(A) or (iv)(B) above has occurred and is continuing, such Event
of Default and all consequences thereof (including, without limitation, any
acceleration or resulting payment default) will be automatically annulled,
waived and rescinded if the Indebtedness that is the subject of such Event of
Default has been discharged or the holders thereof have rescinded their
declaration of acceleration in respect of such Indebtedness or the default that
is the basis for such Event of Default has been cured and no other Event of
Default has occurred and has not been cured or waived.
 
     The holders of not less than a majority in aggregate principal amount at
maturity of the outstanding Notes may, on behalf of the holders of all the
Notes, waive any past defaults under the Indenture, except a default in the
payment of the principal of, premium, if any, or interest on any Note or in
respect of a covenant or provision which under the Indenture cannot be modified
or amended without the consent of the holder of each Note outstanding.
 
     If a Default or an Event of Default occurs and is continuing and is known
to the Trustee, the Trustee will mail to each holder of the Notes notice of the
Default or Event of Default within 30 days after the occurrence thereof. Except
in the case of a Default or an Event of Default in payment of principal of, or
premium, if any, or interest on any Notes, the Trustee may withhold the notice
to the holders of the Notes if a committee of its trust officers in good faith
determines that withholding such notice is in the interests of the holders of
the Notes.
 
     The Company is required to furnish to the Trustee annual statements as to
the performance by the Company of its obligations under the Indenture and as to
any default in such performance. The Company is also required to notify the
Trustee within five days of the occurrence of any Default.
 
                                       88
<PAGE>   90
 
DEFEASANCE OR COVENANT DEFEASANCE OF THE INDENTURE
 
     The Company may, at its option and at any time, elect to have the
obligations of the Company upon the Notes discharged with respect to the
outstanding Notes ("defeasance"). Such defeasance means that the Company will be
deemed to have paid and discharged the entire Indebtedness represented by the
outstanding Notes and to have satisfied all of other obligations under the Notes
and the Indenture insofar as such Notes are concerned except for (i) the rights
of holders of outstanding Notes to receive payments in respect of the principal
of, premium, if any, and interest on the Notes when such payments are due, (ii)
the Company's obligations to issue temporary Notes, register the transfer or
exchange of any such Notes, replace mutilated, destroyed, lost or stolen Notes,
maintain an office or agency for payments in respect of such Notes and segregate
and hold such payments in trust, (iii) the rights, powers, trusts, duties and
immunities of the Trustee and (iv) the defeasance provisions of the Indenture.
In addition, the Company may, at its option and at any time, elect to have the
obligations of the Company released with respect to certain covenants set forth
in the Indenture, and any omission to comply with such obligations shall not
constitute a Default or an Event of Default with respect to the Notes ("covenant
defeasance").
 
     In order to exercise either defeasance or covenant defeasance: (i) the
Company must irrevocably deposit or cause to be deposited with the Trustee, as
trust funds in trust, specifically pledged as security for, and dedicated solely
to, the benefit of the holders of the Notes, cash in United States dollars, U.S.
Government Obligations (as defined in the Indenture), or a combination thereof,
in such amounts as will be sufficient, in the opinion of a nationally recognized
firm of independent public accountants or a nationally recognized investment
banking firm, to pay and discharge the Accreted Value of, premium, if any, and
interest on the outstanding Notes on the Stated Maturity (or upon redemption, if
applicable); (ii) no Default or Event of Default with respect to the Notes will
have occurred and be continuing on the date of such deposit or, insofar as an
event of bankruptcy under clause (vi) of "-- Events of Default" above is
concerned, at any time during the period ending on the 91st day after the date
of such deposit; (iii) such defeasance or covenant defeasance will not result in
a breach or violation of, or constitute a default under, any material agreement
or instrument (other than the Indenture) to which the Company is a party or by
which it is bound; (iv) in the case of defeasance, the Company shall have
delivered to the Trustee an Opinion of Counsel stating that the Company has
received from, or there has been published by, the Internal Revenue Service a
ruling, or since the date of the Private Offering Memorandum, there has been a
change in applicable federal income tax law, in either case to the effect that,
and based thereon such opinion shall confirm that, the holders of the
outstanding Notes will not recognize income, gain or loss for U.S. federal
income tax purposes as a result of such defeasance and will be subject to U.S.
federal income tax on the same amounts, in the same manner and at the same times
as would have been the case if such defeasance had not occurred; (v) in the case
of covenant defeasance, the Company shall have delivered to Trustee an Opinion
of Counsel to the effect that the holders of the Notes outstanding will not
recognize income, gain or loss for U.S. federal income tax purposes as a result
of such covenant defeasance and will be subject to U.S. federal income tax on
the same amounts, in the same manner and at the same times as would have been
the case if such covenant defeasance had not occurred; and (vi) the Company
shall have delivered to the Trustee an officers' certificate and an Opinion of
Counsel, each stating that all conditions precedent provided for relating to
either the defeasance or the covenant defeasance, as the case may be, have been
complied with. (Sections 1301, 1302 and 1303)
 
SATISFACTION AND DISCHARGE
 
     The Indenture will cease to be of further effect (except as to surviving
rights of registration of transfer or exchange of the Notes as expressly
provided for in the Indenture), and the Trustee, at the expense of the Company,
will execute proper instruments acknowledging satisfaction and discharge of the
Indenture when (i) either (a) all the respective Notes theretofore authenticated
and delivered (other than destroyed, lost or stolen Notes which have been
replaced or paid) have been delivered to the Trustee for cancellation or (b) all
the Notes not theretofore delivered to the Trustee for cancellation (x) have
become due and payable, (y) will become due and payable at Stated Maturity
within one year or (z) are to be called for redemption within one year under
arrangements satisfactory to the Trustee for the giving of notice of redemption
by the Trustee in the name, and at the expense, of the Company, and the Company
has irrevocably deposited or caused to be
 
                                       89
<PAGE>   91
 
deposited with the Trustee trust funds in trust for such purpose an amount
sufficient to pay and discharge the entire Indebtedness on the Notes not
theretofore delivered to the Trustee for cancellation, for the Accreted Value
of, premium, if any, and interest on the Notes to the date of such deposit (in
the case of Notes which have become due and payable) or to the Stated Maturity
or redemption date, as the case may be; (ii) the Company has paid or caused to
be paid all other sums payable under the Indenture by the Company; and (iii) the
Company has delivered to the Trustee an officers' certificate and an Opinion of
Counsel, each stating that all conditions precedent provided in the Indenture
relating to the satisfaction and discharge of the Indenture have been complied
with. (Section 401)
 
MODIFICATIONS AND AMENDMENTS
 
     Modifications and amendments of the Indenture may be made by a supplemental
indenture entered into by the Company and the Trustee with the consent of the
holders of a majority in aggregate outstanding principal amount at maturity of
the Notes; provided, however, that no such modification or amendment may,
without the consent of the holder of each outstanding Note affected thereby, (i)
change the Stated Maturity of the principal of, or any installment of interest
on, any Note or reduce the Accreted Value thereof or premium, if any, or the
rate of interest thereon, alter any redemption provision with respect to the
timing or amount of payment thereof, or change the coin or currency in which the
Accreted Value of any Note or any premium or the interest thereon is payable, or
impair the right to institute suit for the enforcement of any such payment after
the Stated Maturity thereof (or, in the case of redemption, on or after the
redemption date); (ii) amend, change or modify the obligation of the Company to
make and consummate an Excess Proceeds Offer with respect to any Asset Sale in
accordance with the "Limitation on Sale of Assets" covenant or the obligation of
the Company to make and consummate a Change of Control Offer in the event of a
Change of Control in accordance with the "Purchase of Notes upon a Change of
Control" covenant, including, in each case, amending, changing or modifying any
definition relating thereto; (iii) reduce the percentage in principal amount at
maturity of outstanding Notes the consent of whose holders is required for any
waiver of compliance with certain provisions of the Indenture; (iv) modify any
of the provisions relating to supplemental indentures requiring the consent of
holders or relating to the waiver of past defaults or relating to the waiver of
certain covenants, except to increase the percentage of outstanding Notes
required for such actions or to provide that certain other provisions of the
Indenture cannot be modified or waived without the consent of the holder of each
Note affected thereby; or (v) except as otherwise permitted under "--
Consolidation, Merger and Sale of Assets," consent to the assignment or transfer
by the Company of any of their respective rights or obligations under the
Indenture. (Sections 901 and 902)
 
     Notwithstanding the foregoing, without the consent of any holder of the
Notes the Company and the Trustee may modify or amend the Indenture: (a) to
evidence the succession of another Person to the Company or any other obligor on
the Notes, and the assumption by any such successor of the covenants of the
Company or such obligor in the Indenture and in the Notes in accordance with "--
Consolidation, Merger, Sale of Assets"; (b) to add to the covenants of the
Company or any other obligor upon the Notes for the benefit of the holders of
such Notes or to surrender any right or power conferred upon the Company or any
other obligor upon such Notes, as applicable, in the Indenture or in such Notes;
(c) to cure any ambiguity, or to correct or supplement any provision in the
Indenture or the Notes or make any other provisions with respect to matters or
questions arising under the Indenture or the Notes; provided that, in each case,
such provisions shall not adversely affect the interest of the holders of such
Notes; (d) to comply with the requirements of the Commission in order to effect
or maintain the qualification, if any, of the Indenture under the TIA; (e) to
evidence and provide the acceptance of the appointment of a successor Trustee
under the Indenture; or (f) to mortgage, pledge, hypothecate or grant a security
interest in favor of the Trustee for the benefit of the holders of the Notes as
additional security for the payment and performance of the Company's obligations
under the Indenture, in any property, or assets, including any of which are
required to be mortgaged, pledged or hypothecated, or in which a security
interest is required to be granted to the Trustee pursuant to the Indenture or
otherwise. (Section 901)
 
     The holders of a majority in aggregate principal amount at maturity of the
Notes outstanding may waive compliance with certain restrictive covenants and
provisions of the Indenture. (Section 1021)
 
                                       90
<PAGE>   92
 
THE TRUSTEE
 
     The Indenture provides that, except during the continuance of an Event of
Default, the Trustee will perform only such duties as are specifically set forth
in the Indenture. If an Event of Default has occurred and is continuing, the
Trustee will exercise such rights and powers vested in it under the Indenture
and use the same degree of care and skill in its exercise as a prudent Person
would exercise under the circumstances in the conduct of such Person's own
affairs.
 
     The Indenture and provisions of the TIA incorporated by reference therein
contain limitations on the rights of the Trustee thereunder should it become a
creditor of the Company, to obtain payment of claims in certain cases or to
realize on certain property received by it in respect of any such claims, as
security or otherwise. The Trustee is permitted to engage in other transactions;
provided, however, that if it acquires any conflicting interest (as defined) it
must eliminate such conflict or resign as Trustee.
 
GOVERNING LAW
 
     The Indenture, the Notes and the Notes Registration Rights Agreement are
governed by, and construed in accordance with, the laws of the State of New
York.
 
CERTAIN DEFINITIONS
 
     Set forth below is a summary of certain defined terms used in the
Indenture. Reference is made to the Indenture for the full definition of all
such terms, as well as any other capitalized terms used herein for which no
definition is provided.
 
     "Accreted Value" is defined to mean, for any specified date, the amount
calculated pursuant to clause (i), (ii), (iii) or (iv) below with respect to
each $1,000 principal amount at Maturity of Notes:
 
          (i) if the specified date occurs on one or more of the following dates
     (each a "Semiannual Accrual Date"), the Accreted Value will equal $543.92
     on the Original Issue Date, and for any Semiannual Accrual Date thereafter,
     the amount set forth below:
 
<TABLE>
<CAPTION>
                                                                    ACCRETED
    SEMIANNUAL ACCRUAL DATE                                           VALUE
    -----------------------                                         ---------
    <S>                                                             <C>
    September 1, 1998...........................................    $  579.48
    March 1, 1999...............................................    $  615.70
    September 1, 1999...........................................    $  654.18
    March 1, 2000...............................................    $  695.07
    September 1, 2000...........................................    $  738.51
    March 1, 2001...............................................    $  784.66
    September 1, 2001...........................................    $  833.71
    March 1, 2002...............................................    $  885.81
    September 1, 2002...........................................    $  941.18
    March 1, 2003...............................................    $1,000.00
</TABLE>
 
          (ii) if the specified date occurs before the first Semiannual Accrual
     Date, the Accreted Value will equal the sum of (a) the original issue price
     and (b) an amount equal to the product of (1) the Accreted Value for the
     first Semiannual Accrual Date less the original issue price multiplied by
     (2) a fraction, the numerator of which is the number of days from the date
     of the Indenture to the specified date, using a 360-day year of twelve
     30-day months, and the denominator of which is the number of days elapsed
     from the date of the Indenture to the first Semiannual Accrual Date, using
     a 360-day year of twelve 30-day months;
 
          (iii) if the specified date occurs between two Semiannual Accrual
     Dates, the Accreted Value will equal the sum of (a) the Accreted Value for
     the Semiannual Accrual Date immediately preceding such specified date and
     (b) an amount equal to the product of (1) the Accreted Value for the
     immediately following Semiannual Accrual Date less the Accreted Value for
     the immediately preceding Semiannual Accrual Date, and (2) a fraction, the
     numerator of which equals the number of days from the
 
                                       91
<PAGE>   93
 
     immediately preceding Semiannual Accrual Date to the specified date, using
     a 360-day year of twelve 30-day months, and the denominator of which is
     180; or
 
          (iv) if the specified date occurs on or after the last Semiannual
     Accrual Date, the Accreted Value will equal $1,000.
 
     "Acquired Indebtedness" means Indebtedness of a Person (a) existing at the
time such Person becomes a Restricted Subsidiary or (b) assumed in connection
with the acquisition of assets from such Person, in each case, other than
Indebtedness incurred in connection with, or in contemplation of, such Person
becoming a Subsidiary or such acquisition; provided that, for purposes of the
"Limitation on Indebtedness" covenant, such Indebtedness shall be deemed to be
incurred on the date of the related acquisition of assets from any Person or the
date the acquired Person becomes a Restricted Subsidiary.
 
     "Affiliate" means, with respect to any specified Person, (i) any other
Person directly or indirectly controlling or controlled by or under direct or
indirect common control with such specified Person or (ii) any other Person that
owns, directly or indirectly, 5% or more of such specified Person's Voting Stock
or any executive officer or director of any such specified Person or other
Person or, with respect to any natural Person, any Person having a relationship
with such Person by blood, marriage or adoption not more remote than first
cousin. For the purposes of this definition, "control," when used with respect
to any specified Person, means the power to direct the management and policies
of such Person, directly or indirectly, whether through the ownership of voting
securities, by contract or otherwise; and the terms "controlling" and
"controlled" have meanings correlative to the foregoing.
 
     "Asset Sale" means any sale, issuance, conveyance, transfer, lease or other
disposition (including, without limitation, by way of merger, consolidation or
sale and leaseback transaction) (collectively, a "transfer"), directly or
indirectly, in one or a series of related transactions, of (i) any Capital Stock
of any Subsidiary; (ii) all or substantially all of the properties and assets of
the Company or its Subsidiaries; or (iii) any other properties or assets of the
Company or any Subsidiary, other than in the ordinary course of business. For
the purposes of this definition, the term "Asset Sale" shall not include any
transfer of properties or assets (A) that is governed by the provisions of the
Indenture described under "-- Consolidation, Merger, Sale of Assets," (B) of the
Company to any Restricted Subsidiary, or of any Restricted Subsidiary to the
Company or any Restricted Subsidiary in accordance with the terms of the
Indenture, (C) having a fair market value of less than $500,000 (or, to the
extent not denominated in United States dollars, the United States Dollar
Equivalent thereof) in any given fiscal year, (D) in any Permitted
Telecommunications Asset Sale, or (E) by the Company or a Restricted Subsidiary
to a Person who is not an Affiliate of the Company in exchange for
Telecommunications Assets (or not less than 66 2/3% of the outstanding Voting
Stock of a Person that becomes a Restricted Subsidiary the assets of which
consist primarily of Telecommunications Assets) or related telecommunications
services where in the good faith judgment of the Company the fair market value
of the Telecommunications Assets (or such Voting Stock) or services so received
is at least equal to the fair market value of the properties or assets disposed
of or, if less, the difference is received by the Company in cash in an amount
at least equal to such difference.
 
     "Attributable Value" means, with respect to any lease at the time of
determination, the present value (discounted at the interest rate implicit in
the lease or, if not known, at the Company's incremental borrowing rate) of the
obligations of the lessee of the property subject to such lease for rental
payments during the remaining term of the lease included in such transaction,
including any period for which such lease has been extended or may, at the
option of the lessor, be extended, or until the earliest date on which the
lessee may terminate such lease without penalty or upon payment of penalty (in
which case the rental payments shall include such penalty), after excluding from
such rental payments all amounts required to be paid on account of maintenance
and repairs, insurance, taxes, assessments, water utilities and similar charges.
 
     "Average Life" means, as of the date of determination with respect to any
Indebtedness, the quotient obtained by dividing (a) the sum of the products of
(i) the number of years from the date of determination to the date or dates of
each successive scheduled principal payment (including, without limitation, any
sinking fund requirements) of such Indebtedness multiplied by (ii) the amount of
each such principal payment by (b) the sum of all such principal payments.
 
                                       92
<PAGE>   94
 
     "Board of Directors" means the board of directors of the Company.
 
     "Capital Stock" means, with respect to any Person, any and all shares,
interests, partnership interests, participations, rights in or other equivalents
(however designated and whether voting or non-voting) of such Person's capital
stock, and any rights (other than debt securities convertible into capital
stock), warrants or options exchangeable for or convertible into such capital
stock, whether now outstanding or issued after the date of the Indenture.
 
     "Capitalized Lease Obligation" means, with respect to any Person, any
obligation of such Person under a lease of (or other agreement conveying the
right to use) any property (whether real, personal or mixed) that is required to
be classified and accounted for as a capital lease obligation under GAAP and,
for the purposes of the Indenture, the amount of such obligation at any date
shall be the capitalized amount thereof at such date, determined in accordance
with GAAP.
 
     "Cash Equivalents" means (i) any evidence of Indebtedness with a maturity
of 180 days or less issued or directly and fully guaranteed or insured by the
United States of America or any agency or instrumentality thereof (provided that
the full faith and credit of the United States of America is pledged in support
thereof); (ii) certificates of deposit or acceptances with a maturity of 180
days or less of any financial institution that is a member of the Federal
Reserve System, in each case having combined capital and surplus and undivided
profits of not less than $500 million; (iii) commercial paper with a maturity of
180 days or less issued by a corporation that is not an Affiliate of the Company
and is organized under the laws of any state of the United States or the
District of Columbia and rated at least A-1 by S&P or at least P-l by Moody's;
and (iv) money market funds which invest substantially all of their assets in
securities of the type described in the preceding clauses (i) through (iii).
 
     "Change of Control" means the occurrence of any of the following events:
(a) any "person" or "group" (as such terms are used in Sections 13(d) and 14(d)
of the Exchange Act), other than Permitted Holders, is or becomes the
"beneficial owner" (as defined in Rules 13d-3 and 13d-5 under the Exchange Act,
except that a Person shall be deemed to have "beneficial ownership" of all
securities that such Person has the right to acquire, whether such right is
exercisable immediately or only after the passage of time), directly or
indirectly, of more than 50% of the total outstanding Voting Stock of the
Company; (b) the Company consolidates with, or merges with or into another
Person or conveys, transfers, leases or otherwise disposes of all or
substantially all of its assets to any Person, or any Person consolidates with
or merges with or into the Company, in any such event pursuant to a transaction
in which the outstanding Voting Stock of the Company is converted into or
exchanged for cash, securities or other property, other than any such
transaction (i) where the outstanding Voting Stock of the Company is not
converted or exchanged at all (except to the extent necessary to reflect a
change in the jurisdiction of incorporation of the Company) or is converted into
or exchanged for (A) Voting Stock (other than Redeemable Capital Stock) of the
surviving or transferee corporation or (B) Voting Stock (other than Redeemable
Capital Stock) of the surviving or transferee corporation and cash, securities
and other property in an amount that could be paid by the Company as a
Restricted Payment as described under the "Limitation on Restricted Payments"
covenant and (ii) immediately after such transaction, no "person" or "group" (as
such terms are used in Sections 13(d) and 14(d) of the Exchange Act), other than
Permitted Holders, is the "beneficial owner" (as defined in Rules 13d-3 and
13d-5 under the Exchange Act, except that a Person shall be deemed to have
"beneficial ownership" of all securities that such Person has the right to
acquire, whether such right is exercisable immediately or only after the passage
of time), directly or indirectly, of more than 50% of the total outstanding
Voting Stock of the surviving or transferee corporation; (c) during any
consecutive two-year period, individuals who at the beginning of such period
constituted the Board of Directors (together with any new directors whose
election to such Board of Directors, or whose nomination for election by the
stockholders of the Company, was approved by a vote of 66 2/3% of the directors
then still in office who were either directors at the beginning of such period
or whose election or nomination for election was previously so approved) cease
for any reason to constitute a majority of the Board of Directors then in
office; (d) the Company is liquidated or dissolved or a special resolution is
passed by the shareholders of the Company approving the plan of liquidation or
dissolution other than in a transaction which complies with the provisions
described under "-- Consolidation, Merger and Sales of Assets"; or (e) a
Permitted Holder holds (i) less than 15% of the outstanding Common Stock at any
time prior to an Initial Public Equity Offering or (ii) more than 65% of the
outstanding Common Stock at any time after an Initial Public Equity Offering.
 
                                       93
<PAGE>   95
 
     "Consolidated Adjusted Net Income" means, for any period, the consolidated
net income (or loss) of the Company and all Restricted Subsidiaries for such
period as determined in accordance with GAAP, adjusted by excluding, without
duplication, (a) any net after-tax extraordinary gains or losses (less all fees
and expenses relating thereto), (b) any net after-tax gains or losses (less all
fees and expenses relating thereto) attributable to asset dispositions other
than in the ordinary course of business, (c) the portion of net income (or loss)
of any Person (other than the Company or a Restricted Subsidiary), including
Unrestricted Subsidiaries, in which the Company or any Restricted Subsidiary has
an ownership interest, except to the extent of the amount of dividends or other
distributions actually paid to the Company or any Restricted Subsidiary in cash
dividends or distributions during such period, (d) net income (but not loss) of
any Person combined with the Company or any Restricted Subsidiary on a "pooling
of interests" basis attributable to any period prior to the date of combination,
(e) the net income of any Restricted Subsidiary, to the extent that the
declaration or payment of dividends or similar distributions by such Restricted
Subsidiary is not at the date of determination permitted, directly or
indirectly, by operation of the terms of its charter or any agreement,
instrument, judgment, decree, order, statute, rule or governmental regulation
applicable to such Restricted Subsidiary or its stockholders and (f) any gain or
loss, net of taxes, realized upon the termination of any employee benefit plan.
 
     "Consolidated Indebtedness to Consolidated Operating Cash Flow Ratio"
means, at any date of determination, the ratio of (i) the aggregate amount of
Indebtedness of the Company and its Restricted Subsidiaries outstanding at the
date of determination as determined on a consolidated basis in accordance with
GAAP to (ii) the aggregate amount of Consolidated Operating Cash Flow for the
then most recent four full fiscal quarters for which consolidated financial
statements of the Company are available preceding the date of the transaction
giving rise to the need to calculate the Consolidated Indebtedness to
Consolidated Operating Cash Flow Ratio (such four fiscal quarter period being
referred to as the "Four Quarter Period").
 
     "Consolidated Interest Expense" of the Company means, for any period,
without duplication, the sum of (a) the interest expense of the Company and its
Restricted Subsidiaries for such period, including, without limitation, (i)
amortization of debt discount, (ii) the net cost of Interest Rate Agreements
(including amortization of discounts), (iii) the interest portion of any
deferred payment obligation, (iv) accrued interest, (v) the consolidated amount
of any interest capitalized by the Company and (vi) amortization of debt
issuance costs, plus (b) the interest component of Capitalized Lease Obligations
of the Company and its Restricted Subsidiaries paid, accrued and/or scheduled to
be paid or accrued during such period, excluding, however, any amount of such
interest of any Restricted Subsidiary if the net income of such Restricted
Subsidiary is excluded in the calculation of Consolidated Adjusted Net Income
pursuant to clause (e) of the definition thereof (but only in the same
proportion as the net income of such Restricted Subsidiary is excluded from the
calculation of Consolidated Adjusted Net Income pursuant to clause (e) of the
definition thereof); provided that the Consolidated Interest Expense
attributable to interest on any Indebtedness computed on a pro forma basis and
(A) bearing a floating interest rate shall be computed as if the rate in effect
on the date of computation had been the applicable rate for the entire period
and (B) which was not outstanding during the period for which the computation is
being made but which bears, at the option of the Company, a fixed or floating
rate of interest, shall be computed by applying, at the option of the Company,
either the fixed or the floating rate.
 
     "Consolidated Operating Cash Flow" means, with respect to any period, the
Consolidated Adjusted Net Income for such period (a) increased by (to the extent
included in computing Consolidated Adjusted Net Income) the sum of (i) the
Consolidated Tax Expense for such period (other than taxes attributable to
extraordinary, unusual or non-recurring gains or losses); (ii) Consolidated
Interest Expense for such period; (iii) depreciation of the Company and the
Restricted Subsidiaries for such period, determined on a consolidated basis in
accordance with GAAP; (iv) amortization of the Company and its Restricted
Subsidiaries for such period, determined on a consolidated basis in accordance
with GAAP; and (v) any other non-cash charges that were deducted in computing
Consolidated Adjusted Net Income (excluding any non-cash charge which requires
an accrual or reserve for cash charges for any future period) of the Company and
its Restricted Subsidiaries for such period in accordance with GAAP and (b)
decreased by any non-cash gains that were included in computing Consolidated
Adjusted Net Income.
 
                                       94
<PAGE>   96
 
     "Consolidated Tax Expense" means, for any period, the provision for
federal, state, provincial, local and foreign income taxes of the Company and
all Restricted Subsidiaries for such period as determined on a consolidated
basis in accordance with GAAP.
 
     "Currency Agreements" means any spot or forward foreign exchange agreements
and currency swap, currency option or other similar financial agreements or
arrangements entered into by the Company or any of its Restricted Subsidiaries
designed solely to protect against or manage exposure to fluctuations in
currency exchange rates.
 
     "Default" means any event that after notice or passage of time or both
would be an Event of Default.
 
     "Disinterested Director" means, with respect to any transaction or series
of transactions in respect of which the Board of Directors is required to
deliver a resolution of the Board of Directors under the Indenture, a member of
the Board of Directors who does not have any material direct or indirect
financial interest in or with respect to such transaction or series of
transactions.
 
     "Exchange Act" means the Securities Exchange Act of 1934, as amended.
 
     "Existing Subsidiaries" means Digital Teleport, Inc.
 
     "Generally Accepted Accounting Principles" or "GAAP" means generally
accepted accounting principles in the United States on the date of the
Indenture.
 
     "Guarantee" means, as applied to any obligation, (a) a guarantee (other
than by endorsement of negotiable instruments for collection in the ordinary
course of business), direct or indirect, in any manner, of any part or all of
such obligation and (b) an agreement, direct or indirect, contingent or
otherwise, the practical effect of which is to assure in any way the payment or
performance (or payment of damages in the event of non-performance) of all or
any part of such obligation, including, without limiting the foregoing, the
payment of amounts drawn down by letters of credit.
 
     "Incur" or "incur" means, with respect to any Indebtedness, to create,
issue, assume, guarantee or in any manner become directly or indirectly liable
for the payment of, or otherwise incur such Indebtedness; provided that neither
the accrual of interest nor the accretion of original issue discount shall be
considered an Incurrence of Indebtedness.
 
     "Indebtedness" means, with respect to any Person, without duplication, (a)
all liabilities, contingent or otherwise, of such Person: (i) for borrowed money
(including overdrafts), (ii) in connection with any letters of credit and
acceptances issued under letter of credit facilities, acceptance facilities or
other similar facilities, (iii) evidenced by bonds, notes, debentures or other
similar instruments, (iv) for the deferred purchase price of property or
services or created or arising under any conditional sale or other title
retention agreement with respect to property acquired by such Person, or (v) for
Capitalized Lease Obligations; (b) all obligations of such Person under or in
respect of Interest Rate Agreements or Currency Agreements; (c) all indebtedness
referred to in (but not excluded from) the preceding clauses of other Persons
and all dividends of other Persons, the payment of which is secured by (or for
which the holder of such Indebtedness has an existing right, contingent or
otherwise, to be secured by) any Lien upon or with respect to property
(including, without limitation, accounts and contract rights) owned by such
Person, even though such Person has not assumed or become liable for the payment
of such Indebtedness (the amount of such obligation being deemed to be the
lesser of the value of such property or asset or the amount of the obligation so
secured); (d) all guarantees by such Person of Indebtedness referred to in this
definition of any other Person; and (e) all Redeemable Capital Stock of such
Person valued at the greater of its voluntary or involuntary maximum fixed
repurchase price plus accrued and unpaid dividends. The amount of Indebtedness
of any Person at any date shall be the outstanding balance at such date (or, in
the case of a revolving credit or other similar facility, the total amount of
funds outstanding and/or available on the date of determination) of all
unconditional obligations as described above and, with respect to contingent
obligations, the maximum liability upon the occurrence of the contingency giving
rise to the obligation; provided that the amount outstanding at any time of any
Indebtedness issued with original issue discount equals the face amount of such
Indebtedness less the remaining unamortized portion of the original issue
discount with respect to such Indebtedness at such time as determined in
conformity with
 
                                       95
<PAGE>   97
 
GAAP. For purposes hereof, the "maximum fixed repurchase price" of any
Redeemable Capital Stock which does not have a fixed repurchase price shall be
calculated in accordance with the terms of such Redeemable Capital Stock as if
such Redeemable Capital Stock were purchased on any date on which Indebtedness
shall be required to be determined pursuant to the Indenture, and if such price
is based upon, or measured by, the fair market value of such Redeemable Capital
Stock, such fair market value shall be determined in good faith by the board of
directors of the issuer of such Redeemable Capital Stock. Notwithstanding the
foregoing, trade accounts and accrued liabilities arising in the ordinary course
of business and any liability for federal, state or local taxes or other taxes
owed by such Person will not be considered Indebtedness for purposes of this
definition.
 
     "Interest Rate Agreements" means any interest rate protection agreements
and other types of interest rate hedging agreements or arrangements (including,
without limitation, interest rate swaps, caps, floors, collars and other similar
agreements) designed solely to protect the Company or any Restricted Subsidiary
against fluctuations in interest rates in respect of Indebtedness of the Company
or any Restricted Subsidiary.
 
     "Investment" means, with respect to any Person, any direct or indirect
advance, loan or other extension of credit or capital contribution to (by means
of any transfer of cash or other property to others or any payment for property
or services for the account or use of others), or any purchase, acquisition or
ownership by such Person of any Capital Stock, bonds, notes, debentures or other
securities or evidences of Indebtedness issued or owned by, any other Person and
all other items that would be classified as investments on a balance sheet
prepared in accordance with GAAP. In addition, the fair market value of the net
assets of any Subsidiary at the time that such Subsidiary is designated an
Unrestricted Subsidiary shall be deemed to be an "Investment" made by the
Company in such Unrestricted Subsidiary at such time. "Investments" shall
exclude extensions of trade credit on commercially reasonable terms in
accordance with normal trade practices and any loans, advances or extensions of
credit to an employee of the Company or any Subsidiaries made in the ordinary
course of business; provided that such loans, advances or extensions of credit
shall not have an aggregate principal amount in excess of $1.0 million at any
one time outstanding.
 
     "Original Issue Date" means the date of the Indenture.
 
     "Lien" means any mortgage, charge, pledge, lien (statutory or otherwise),
privilege, security interest, hypothecation, assignment for security, claim, or
preference or priority or other encumbrance upon or with respect to any property
of any kind, real or personal, movable or immovable, now owned or hereafter
acquired. A Person shall be deemed to own subject to a Lien any property which
such Person has acquired or holds subject to the interest of a vendor or lessor
under any conditional sale agreement, capital lease or other title retention
agreement.
 
     "Maturity" means, with respect to any Note, the date on which any principal
of such Note becomes due and payable as provided therein or in the Indenture,
whether at the Stated Maturity with respect to such principal or by declaration
of acceleration, call for redemption or purchase or otherwise.
 
     "Moody's" means Moody's Investors Service, Inc. and its successors.
 
     "Net Cash Proceeds" means (a) with respect to any Asset Sale, the proceeds
thereof in the form of cash or Cash Equivalents including payments in respect of
deferred payment obligations when received in the form of, or stock or other
assets when disposed for, cash or Cash Equivalents (except to the extent that
such obligations are financed or sold with recourse to the Company or any
Restricted Subsidiary), net of (i) brokerage commissions and other fees and
expenses (including fees and expenses of legal counsel and investment banks)
related to such Asset Sale, (ii) provisions for all taxes payable as a result of
such Asset Sale, (iii) payments made to retire Indebtedness where payment of
such Indebtedness is secured by the assets or properties which are the subject
of such Asset Sale, (iv) amounts required to be paid to any Person (other than
the Company or any Restricted Subsidiary) owning a beneficial interest in the
assets subject to the Asset Sale and (v) appropriate amounts to be provided by
the Company or any Restricted Subsidiary, as the case may be, as a reserve
required in accordance with GAAP against any liabilities associated with such
Asset Sale and retained by the Company or any Restricted Subsidiary, as the case
may be, after such Asset Sale, including, without limitation, pension and other
post-employment benefit liabilities, liabilities related to
 
                                       96
<PAGE>   98
 
environmental matters and liabilities under any indemnification obligations
associated with such Asset Sale, all as reflected in an officers' certificate
delivered to the Trustee and (b) with respect to any issuance or sale of Capital
Stock or options, warrants or rights to purchase Capital Stock, or debt
securities or Redeemable Capital Stock that have been converted into or
exchanged for Qualified Capital Stock, as referred to under the "Limitation on
Restricted Payments" covenant, the proceeds of such issuance or sale in the form
of cash or Cash Equivalents, including payments in respect of deferred payment
obligations when received in the form of, or stock or other assets when disposed
for, cash or Cash Equivalents (except to the extent that such obligations are
financed or sold with recourse to the Company or any Subsidiary of the Company),
net of attorney's fees, accountant's fees and brokerage, consultation,
underwriting and other fees and expenses actually incurred in connection with
such issuance or sale and net of taxes paid or payable as a result thereof.
 
     "Participant" is defined to mean, with respect to DTC, Persons who have
accounts with DTC.
 
     "Permitted Holder" means either of (a) (i) collectively, Richard Weinstein,
his spouse, issues or other members of his immediate family (collectively, the
"Weinstein Family") (ii) trusts or other entities created for the benefit of any
member of the Weinstein Family, (iii) entities controlled by any of the
Weinstein Family and (iv) in the event of the death of any members of the
Weinstein Family, the heirs or testamentary legatees of such member of the
Weinstein Family, or (b) collectively, KLT and any of its controlled Affiliates
(as defined under Rules 13d-3 and 13d-5 under the Exchange Act).
 
     "Permitted Indebtedness" means any of the following:
 
          (a) Indebtedness of the Company pursuant to the Notes;
 
          (b) Indebtedness of the Company owing to any Restricted Subsidiary
     (but only so long as such Indebtedness is held by such Restricted
     Subsidiary); provided that any Indebtedness of the Company owing to any
     such Restricted Subsidiary is subordinated in right of payment from and
     after such time as the Notes shall become due and payable (whether at
     Stated Maturity, by acceleration or otherwise) to the payment and
     performance of the Company's obligations under the Notes; provided further
     that any transaction pursuant to which any Restricted Subsidiary to which
     such Indebtedness is owed, ceases to be a Restricted Subsidiary shall be
     deemed to be an incurrence of such Indebtedness by such Restricted
     Subsidiary that is not permitted by this clause (b);
 
          (c) Indebtedness of the Company or any Restricted Subsidiary
     consisting of guarantees, indemnities or obligations in respect of purchase
     price adjustments in connection with one or more commercial bank facilities
     permitted under clause (j) of the "Permitted Indebtedness" definition or in
     connection with the acquisition of or disposition of assets, including,
     without limitation, shares of Capital Stock;
 
          (d) Indebtedness of the Company or any Restricted Subsidiary under
     letter of credit facilities that are used to finance trade payables in the
     ordinary course of business and under which recourse to the Company or any
     Restricted Subsidiary is limited to the cash securing such letters of
     credit;
 
          (e) Indebtedness of the Company or any Restricted Subsidiary under
     Currency Agreements and Interest Rate Agreements entered into in the
     ordinary course of business, provided that such agreements do not increase
     the Indebtedness of the obligor outstanding at any time other than as a
     result of fluctuations in foreign currency exchange rates or interest rates
     or by reason of fees, indemnities and compensation payable thereunder;
 
          (f) Indebtedness of the Company or any Restricted Subsidiary in
     addition to that permitted to be incurred pursuant to clauses (a) through
     (e) above in an aggregate principal amount not in excess of $25.0 million
     (or, to the extent not denominated in United States dollars, the United
     States Dollar Equivalent thereof) at any one time outstanding;
 
          (g) Purchase Money Indebtedness;
 
          (h) Indebtedness of any Restricted Subsidiary to the Company;
 
          (i) Prior to December 31, 2000, Indebtedness of the Company or any
     Restricted Subsidiary not to exceed, at any one time outstanding, two times
     (A) the Net Cash Proceeds received by the Company
 
                                       97
<PAGE>   99
 
     after the date of the Indenture as a capital contribution or from the
     issuance and sale of its Qualified Capital Stock to a Person that is not a
     Subsidiary of the Company, to the extent such Net Cash Proceeds have not
     been used pursuant to clause (a)(3)(B) or clauses (b)(ii) and (iii) of the
     "Limitation on Restricted Payments" covenant to make a Restricted Payment
     and (B) 80% of the fair market value of property (other than cash and Cash
     Equivalents) received by the Company after the date of the Indenture as a
     contribution of capital or from the sale of its Qualified Capital Stock to
     a person that is not a Subsidiary of the Company, to the extent such
     capital contribution or sale of Qualified Capital Stock has not been used
     pursuant to clause (a)(3)(B) of the "Limitation on Restricted Payments"
     covenant to make a Restricted Payment; provided that such Indebtedness does
     not mature prior to the Stated Maturity of the Notes and has an Average
     Life longer than the Notes;
 
          (j) Indebtedness of the Company or any Restricted Subsidiary under one
     or more commercial bank facilities outstanding at any time in an aggregate
     principal amount not to exceed $70.0 million plus the greater of (x) 80% of
     the accounts receivable of the Company or (y) $30.0 million; and
 
          (k) any renewals, extensions, substitutions, refinancings or
     replacements (each, for purpose of this clause, a "refinancing") of any
     Indebtedness of the Company (including all or any part of the Notes) or any
     Restricted Subsidiary by the Company, or any refinancing of any
     Indebtedness of any Restricted Subsidiary by such Restricted Subsidiary,
     other than Indebtedness incurred pursuant to clauses (b) through (f) and
     (h) through (j) of this definition, including any successive refinancings,
     so long as (i) any such new Indebtedness shall be in a principal amount
     that does not exceed the principal amount (or, if such Indebtedness being
     refinanced provides for an amount less than the principal amount thereof to
     be due and payable upon a declaration of acceleration thereof, such lesser
     amount as of the date of determination) so refinanced, plus the amount of
     any premium reasonably determined as necessary to accomplish such
     refinancing and the amount of expenses of the Company incurred in
     connection with such refinancing, (ii) in the case of any refinancing of
     Subordinated Indebtedness, such new Indebtedness is made subordinate to the
     Notes at least to the same extent as the Indebtedness being refinanced,
     (iii) in the case of any refinancing of Indebtedness that is pari passu in
     right of payment with the Notes, such new Indebtedness is made pari passu
     in right of payment with, or subordinate in right of payment to, the Notes
     and (iv) (A) if such indebtedness being refinanced has an Average Life
     longer than the Average Life of the Notes, such new Indebtedness has an
     Average Life longer than the Average Life of the Notes and a final Stated
     Maturity later than the final Stated Maturity of the Notes and (B) if such
     Indebtedness being refinanced has an Average Life shorter than the Average
     Life of the Notes, such Indebtedness has an Average Life longer than, and a
     Final Stated Maturity Date later than, such Indebtedness being so
     refinanced.
 
          "Permitted Investments" means any of the following:
 
          (a) Investments in Cash Equivalents;
 
          (b) Investments in the Company or any Restricted Subsidiary;
 
          (c) Investments by the Company or any Restricted Subsidiary in another
     Person, if as a result of such Investment (i) such other Person becomes a
     Restricted Subsidiary and the Company or another Restricted Subsidiary owns
     at least 66 2/3% of the outstanding Voting Stock of such other Person or
     (ii) such other Person is merged or consolidated with or into, or transfers
     or conveys all or substantially all of its assets to, the Company or a
     Restricted Subsidiary;
 
          (d) Investments by the Company or any Restricted Subsidiary in any
     Person engaged in the delivery of telephony or other telecommunications or
     data transmission services in North America, the sum of which does not
     exceed $20.0 million at any one time outstanding; or
 
          (e) Investments in existence on the date of the Indenture.
 
                                       98
<PAGE>   100
 
     "Permitted Liens" means the following types of Liens:
 
          (a) Liens existing as of the date of the issuance of the Notes;
 
          (b) Liens on any property or assets of a Subsidiary granted in favor
     of the Company or any Restricted Subsidiary;
 
          (c) Liens securing the Notes;
 
          (d) any interest or title of a lessor under any Capitalized Lease
     Obligation or of a seller under any Purchase Money Indebtedness permitted
     by the Indenture;
 
          (e) Liens securing Indebtedness incurred under clause (j) of the
     definition of "Permitted Indebtedness";
 
          (f) statutory Liens or landlord's and carrier's, warehouseman's,
     mechanic's, supplier's, materialmen's, repairmen's or other like Liens
     arising in the ordinary course of business and with respect to amounts not
     yet delinquent or being contested in good faith by appropriate proceeding,
     if a reserve or other appropriate provision, if any, as shall be required
     in conformity with GAAP shall have been made therefor;
 
          (g) Liens for taxes, assessments, government charges or claims that
     are being contested in good faith by appropriate proceedings promptly
     instituted and diligently conducted and if a reserve or other appropriate
     provision, if any, as shall be required in conformity with GAAP shall have
     been made therefor;
 
          (h) Liens incurred or deposits made to secure the performance of
     tenders, bids, leases, statutory obligations, surety and appeal bonds,
     government contracts, performance bonds and other obligations of a like
     nature (including, without limitation, indefeasible rights to use) incurred
     in the ordinary course of business (other than contracts for the payment of
     money);
 
          (i) easements, servitudes, rights-of-way, restrictions (including,
     without limitation, zoning restrictions) and other similar charges or
     encumbrances not interfering in any material respect with the business of
     the Company or any Subsidiary incurred in the ordinary course of business;
 
          (j) Liens arising by reason of any judgment, decree or order of any
     court so long as such Lien is adequately bonded and any appropriate legal
     proceedings that may have been duly initiated for the review of such
     judgment, decree or order shall not have been finally terminated or the
     period within which such proceedings may be initiated shall not have
     expired;
 
          (k) Liens securing Acquired Indebtedness created prior to (and not in
     connection with or in contemplation of) the incurrence of such Indebtedness
     by the Company or any Subsidiary; provided that such Lien does not extend
     to any property or assets of the Company or any Subsidiary other than the
     assets acquired in connection with the incurrence of such Acquired
     Indebtedness;
 
          (l) Liens securing Interest Rate Agreements or Currency Agreements
     permitted to be incurred pursuant to clause (e) of the definition of
     "Permitted Indebtedness" or any collateral for the Indebtedness to which
     such Interest Rate Agreements or Currency Agreements relate;
 
          (m) Liens arising from purchase money mortgages and purchase money
     security interests; provided that (i) the related Indebtedness shall not be
     secured by any property or assets of the Company or any Subsidiary other
     than the property and assets so acquired and (ii) the Lien securing such
     Indebtedness shall be created within 60 days of such acquisition;
 
          (n) Liens with respect to assets of a Restricted Subsidiary granted by
     such Restricted Subsidiary to the Company or a Restricted Subsidiary to
     secure Indebtedness owing to the Company or such Restricted Subsidiary;
 
          (o) pledges and deposits made in the ordinary course of business in
     connection with workers' compensation, unemployment insurance and other
     types of statutory obligations; and
 
                                       99
<PAGE>   101
 
          (p) any extension, renewal or replacement, in whole or in part, of any
     Lien described in the foregoing clauses (a) through (o); provided that any
     such extension, renewal or replacement shall be no more restrictive in any
     material respect than the Lien so extended, renewed or replaced and shall
     not extend to any additional property or assets.
 
     "Permitted Telecommunications Asset Sale" means any transfer, conveyance,
sale, lease or other disposition of a capital asset that is a Telecommunications
Asset, the proceeds of which are treated as revenues (including deferred
revenues) by the Company in accordance with GAAP.
 
     "Person" means any individual, corporation, limited liability company,
partnership, joint venture, association, joint-stock company, trust,
unincorporated organization or government or any agency or political subdivision
thereof.
 
     "Preferred Stock" means, with respect to any Person, any and all shares,
interests, participation or other equivalents (however designated) of such
Person's preferred or preference stock whether now outstanding, or issued after
the Original Issue Date, and including, without limitation, all classes and
series of preferred or preference stock of such Person.
 
     "Purchase Money Indebtedness" means Indebtedness of the Company or any
Restricted Subsidiaries incurred at any time within 270 days of, and for the
purpose of financing all or any part of the cost of, the construction,
expansion, installation, acquisition or improvement by the Company or any
Restricted Subsidiary of the Company of any new Telecommunications Assets or not
less than 66 2/3 percent of the outstanding Voting Stock of a Person that
becomes a Restricted Subsidiary the assets of which consist primarily of
Telecommunications Assets constructed, expanded, installed, acquired or improved
after the date of the Indenture; provided that the proceeds of such Indebtedness
are expended for such purposes within such 270-day period; and provided,
further, that the Net Cash Proceeds from the issuance of such Indebtedness does
not exceed, as of the date of incurrence of such Indebtedness, 100% of the
lesser of cost or fair market value of such Telecommunication Assets.
 
     "Public Equity Offering" means an underwritten public offering or flotation
of Common Stock of the Company which has been registered under the Securities
Act.
 
     "Qualified Capital Stock" of any person means any and all Capital Stock of
such person other than Redeemable Capital Stock.
 
     "Redeemable Capital Stock" means any class or series of Capital Stock that,
either by its terms, by the terms of any security into which it is convertible
or exchangeable or by contract or otherwise, is, or upon the happening of an
event or passage of time would be, required to be redeemed prior to the final
Stated Maturity of the Notes or is redeemable at the option of the holder
thereof at any time prior to such final Stated Maturity, or is convertible into
or exchangeable for debt securities at any time prior to such final Stated
Maturity; provided that any Capital Stock that would not constitute Redeemable
Capital Stock but for provisions thereof giving holders thereof the right to
require such Person to repurchase or redeem such Capital Stock upon the
occurrence of an "asset sale" or "change of control" occurring prior to the
Stated Maturity of the Notes shall not constitute Redeemable Capital Stock if
the "asset sale" or "change of control" provisions applicable to such Capital
Stock are no more favorable in any material respect to the holders of such
Capital Stock than the provisions contained in "Limitation on Asset Sales" and
"Repurchase of Notes upon a Change of Control" covenants are to the holders of
the Notes, and such Capital Stock specifically provides that such Person will
not repurchase or redeem any such stock pursuant to such provision prior to the
Company's repurchase of such Notes as are required to be repurchased pursuant to
the "Limitation on Asset Sales" and "Repurchase of Notes upon a Change of
Control" covenants.
 
     "Restricted Subsidiary" means the Existing Subsidiaries and any Subsidiary
that is not designated an Unrestricted Subsidiary by the Board of Directors.
 
     "S&P" means Standard and Poor's Ratings Services, a division of
McGraw-Hill, Inc., and its successors.
 
                                       100
<PAGE>   102
 
     "Significant Subsidiary" means, at any date of determination, any
Restricted Subsidiary that, together with its subsidiaries, (i) for the most
recent fiscal year of the Company accounted for more than 10% of the
consolidated revenues of the Company and the Restricted Subsidiaries, (ii) as of
the end of such fiscal year, was the owner of more than 10% of the consolidated
assets of the Company and the Restricted Subsidiaries, in each case as set forth
on the most recently available consolidated financial statements of the Company
and the Restricted Subsidiaries for such fiscal year, or (iii) owns one or more
licenses or concessions to provide telecommunications or data transmission
services in the United States.
 
     "Stated Maturity" means, when used with respect to any Note or any
installment of interest thereon, the date specified in such Note as the fixed
date on which the principal of such Note or such installment of interest is due
and payable, and, when used with respect to any other Indebtedness, means the
date specified in the instrument governing such Indebtedness as the fixed date
on which the principal of such Indebtedness, or any installment of interest
thereon, is due and payable.
 
     "Subordinated Indebtedness" means Indebtedness of the Company that is
expressly subordinated in right of payment to the Notes.
 
     "Subsidiary" means any Person a majority of the equity ownership or Voting
Stock of which is at the time owned, directly or indirectly, by the Company or
by one or more other Subsidiaries or by the Company and one or more other
Subsidiaries.
 
     "Tax" is defined to mean any tax, duty, levy, impost, assessment or other
governmental charge (including penalties, interest and any other liabilities
related thereto).
 
     "Taxing Authority" is defined to mean any government or political
subdivision or territory or possession of any government or any authority or
agency therein or thereof having power to tax.
 
     "Telecommunications Assets" means, with respect to any Person, all assets,
rights (contractual or otherwise) and properties, whether tangible or
intangible, used or intended for use in connection with a Telecommunications
Business; provided that such assets are accounted for as "property, plant and
equipment" on the Company's consolidated balance sheet in accordance with GAAP.
 
     "Telecommunications Business" means the business of (i) transmitting, or
providing services relating to the transmission of, voice, video or data through
owned or leased transmission facilities, (ii) constructing, creating, developing
or marketing communications related network equipment, software and other
devices for use in a telecommunications business or (iii) evaluating,
participating or pursuing any other activity or opportunity that is primarily
related to those identified in clause (i) or (ii) above; provided that the
determination of what constitutes a Telecommunications Business shall be made in
good faith by the board of directors of the Company.
 
     "Trust Indenture Act" or "TIA" means the Trust Indenture Act of 1939, as
amended.
 
     "U.S. Government Securities" means securities that are (i) direct
obligations of the United States of America for the payment of which its full
faith and credit is pledged or (ii) obligations of a Person controlled or
supervised by and acting as an agency of instrumentality of the United States of
America (x) the payment of which is unconditionally guaranteed as a full faith
and credit obligation by the United States of America or (y) that are rated at
least "Aaa" (or the then equivalent grade) by Moody's or "AAA" (or the then
equivalent grade) by S&P.
 
     "United States Dollar Equivalent" means, with respect to any monetary
amount in a currency other than the United States dollar, at any time for the
determination thereof, the amount of United States dollars obtained by
converting such foreign currency involved in such computation into United States
dollars at the spot rate for the purchase of United States dollars with the
applicable foreign currency as quoted by Reuters at approximately 11:00 a.m.
(New York City time) on the date not more than two business days prior to such
determination. For purposes of determining whether any Indebtedness can be
incurred (including Permitted Indebtedness), any Investment can be made and any
transaction described in the "Limitation on Transactions with Affiliates"
covenant can be undertaken (a "Tested Transaction"), the "United States Dollar
Equivalent" of such Indebtedness, Investment or transaction described in the
"Limitation on Transactions with Affiliates"
 
                                       101
<PAGE>   103
 
covenant will be determined on the date incurred, made or undertaken and no
subsequent change in the United States Dollar Equivalent shall cause such Tested
Transaction to have been incurred, made or undertaken in violation of the
Indenture.
 
     "Unrestricted Subsidiary" means (a) any Subsidiary that at the time of
determination shall be an Unrestricted Subsidiary (as designated by the Board of
Directors, as provided below) and (b) any Subsidiary of an Unrestricted
Subsidiary. The Board of Directors may designate any Subsidiary (including any
newly acquired or newly formed Subsidiary) to be an Unrestricted Subsidiary so
long as (i) neither the Company nor any other Subsidiary is directly or
indirectly liable for or provides credit support for or guarantees any
Indebtedness of such Subsidiary, (ii) no default with respect to any
Indebtedness of such Subsidiary would permit (upon notice, lapse of time or
otherwise) any holder of any other Indebtedness of the Company or any other
Subsidiary to declare a default on such other Indebtedness or cause the payment
thereof to be accelerated or payable prior to its stated maturity, (iii) any
Investment in such Subsidiary made as result of designating such Subsidiary an
Unrestricted Subsidiary will not violate the provisions of the "Limitation on
Investments in Unrestricted Subsidiaries" covenant, (iv) neither the Company nor
any other Subsidiary has a contract, agreement, arrangement, understanding or
obligation of any kind, whether written or oral, with such Subsidiary other than
those that might be obtained at the time from persons who are not Affiliates of
the Company and (v) neither the Company nor any other Subsidiary has any
obligation (1) to subscribe for additional shares of Capital Stock or other
equity interest in such Subsidiary or (2) to maintain or preserve such
Subsidiary's financial condition or to cause such Subsidiary to achieve certain
levels of operating results. Any such designation by the Board of Directors
shall be evidenced to the Trustee by filing a board resolution with the Trustee
giving effect to such designation. The Board of Directors may designate any
Unrestricted Subsidiary as a Restricted Subsidiary if, immediately after giving
effect to such designation, there would be no Default or Event of Default under
the Indenture and the Company could incur $1.00 of additional Indebtedness
(other than Permitted Indebtedness) pursuant to the "Limitation on Indebtedness"
covenant. In no event shall the Existing Subsidiaries be designated as
Unrestricted Subsidiaries.
 
     "Voting Stock" means, with respect to any Person, any class or classes of
Capital Stock pursuant to which the holders thereof have the general voting
power under ordinary circumstances to elect at least a majority of the board of
directors, managers or trustees of such Person (irrespective of whether or not,
at the time, stock of any other class or classes shall have, or might have,
voting power by reason of the happening of any contingency).
 
     "Wholly Owned" means, with respect to any Subsidiary, such Subsidiary if
all the outstanding Capital Stock of such Subsidiary (other than any directors'
qualifying shares) is owned directly by the Company or by the Company and one or
more Wholly Owned Restricted Subsidiaries.
 
                                       102
<PAGE>   104
 
                          DESCRIPTION OF THE WARRANTS
 
     In connection with the Private Offering, the Company issued Warrants to
purchase 3,926,560 shares of Common Stock. Upon the effectiveness of the
Registration Statement of which this Prospectus is a part, the Notes and the
Warrants will be separately transferable, in accordance with any applicable
restrictions on transferability thereof as provided by the respective terms
thereof. The following is a description of the Warrants.
 
GENERAL
 
   
     The Warrants were issued under a Warrant Agreement dated as of February 23,
1998 (the "Warrant Agreement") between the Company, as issuer, and The Bank of
New York, as Warrant Agent (the "Warrant Agent"). The following summary of
certain provisions of the Warrants and the Warrant Agreement does not purport to
be complete and is subject to, and qualified in its entirety by reference to,
all the provisions of the Warrants and the Warrant Agreement, including the
definitions of certain terms contained therein. The Warrant Agreement has been
filed as an exhibit to the Registration Statement of which this Prospectus is a
part, and copies of such Agreement are available upon request from the Company
or the Warrant Agent. For definitions of certain capitalized terms used in this
summary, see "-- Certain Definitions" below.
    
 
     Each Warrant entitles the registered holder thereof, subject to and upon
compliance with the provisions thereof and of the Warrant Agreement, at such
holder's option, after the Exercisability Date and prior to 5:00 P.M., New York
City time, on March 1, 2008 (the "Expiration Date") to purchase from the Company
1.552 shares of Common Stock at an exercise price (the "Exercise Price") of
$0.01 per share of Common Stock issuable upon exercise of the Warrants (the
"Warrant Shares") (both the Exercise Price and securities issuable upon exercise
of the Warrants being subject to adjustments as provided in the Warrant
Agreement). Each Warrant may be exercised on any business day on or after the
Exercisability Date and on or prior to the Expiration Date. Any Warrant not
exercised before the close of business on the Expiration Date shall become void,
and all rights of the holder under the Warrant Certificate evidencing such
Warrant and under the Warrant Agreement shall cease.
 
EXERCISE
 
     Warrants may be exercised by surrendering the Warrant Certificate
evidencing such Warrants with the form of election to purchase shares of Common
Stock set forth on the reverse side thereof duly completed and executed by the
holder thereof and by paying in full the Exercise Price for such Warrants at the
office or agency in The City of New York maintained for such purposes (which
will initially be the corporate trust office of the Warrant Agent located at 101
Barclay Street, New York, New York 10286).
 
     Each Warrant may only be exercised in whole and the Exercise Price may be
paid in full, at the option of the holder (i) in cash or by certified or
official bank check, (ii) by a Cashless Exercise or (iii) by any combination of
(i) and (ii). For purposes of the Warrant Agreement, a "Cashless Exercise" will
mean an exercise of a Warrant in accordance with the immediately following two
sentences. To effect a Cashless Exercise, the holder may exercise a Warrant or
Warrants without payment of the Exercise Price in cash by surrendering such
Warrant or Warrants (represented by one or more Warrant Certificates) and, in
exchange therefor, receiving such number of shares of Common Stock equal to the
product of (1) the number of shares of Common Stock for which such Warrant or
Warrants are exercisable and which would be issuable in the event of an exercise
with payment in cash of the Exercise Price and (2) the Cashless Exercise Ratio
(as defined below). For purposes of the Warrant Agreement, the "Cashless
Exercise Ratio" will equal a fraction, the numerator of which is the excess of
the Current Market Value (calculated as set forth in the Warrant Agreement) per
share of Common Stock on the date of exercise over the Exercise Price per share
of Common Stock as of the date of exercise, and the denominator of which is the
Current Market Value per share of the Common Stock on the date of exercise. Upon
surrender of a Warrant Certificate representing more than one Warrant in
connection with a holder's option to elect a Cashless Exercise, such holder must
specify the number of Warrants for which such Warrant Certificate is to be
exercised (without giving effect to such Cashless Exercise). All provisions of
the Warrant Agreement shall be applicable with respect to a Cashless
 
                                       103
<PAGE>   105
 
Exercise of a Warrant Certificate for less than the full number of Warrants
represented thereby. No payment or adjustment shall be made on account of any
dividends on the Common Stock issued upon exercise of a Warrant.
 
     If the Company has not effected the registration under the Securities Act
of the offer and sale of the Warrant Shares by the Company to the holders of the
Warrants on or prior to the Exercise Date (as defined below), the Company may
elect to require that holders of the Warrants effect the exercise of the
Warrants solely pursuant to the Cashless Exercise option and may also amend the
Warrants to eliminate the requirement for payment of the Exercise Price with
respect to such Cashless Exercise option.
 
     The Company will, as soon as practicable after the occurrence of an
Exercise Event (as defined below), send to each holder of Warrants and to each
beneficial owner of the Warrants to the extent that the Warrants are held of
record by a depository or other agent, by first-class mail, at the addresses
appearing on the Warrant Register, a notice of the Exercise Event which has
occurred, which notice shall describe the type of Exercise Event, the date of
the occurrence thereof and the date of expiration of the right to exercise the
Warrants prominently set forth on the face of such notice.
 
     Subject to the terms of the Warrant Agreement, the Warrant Certificates
evidencing the Warrants may be surrendered for exercise or exchange, and the
transfer of Warrant Certificates will be registerable, at the office or agency
of the Company maintained for such purpose, which initially will be the
corporate trust office of the Warrant Agent in New York, New York. The Warrant
Certificates will be issued either in global form or in registered form as
definitive Warrant Certificates. No service charge will be made for any
exercise, exchange or registration of transfer of Warrant Certificates, but the
Company may require payment of a sum sufficient to cover any tax or other
governmental charge payable in connection therewith.
 
DISTRIBUTION RIGHTS; ADJUSTMENT TO EXERCISE RATE; MERGER OR CONSOLIDATION
 
     In general, holders of Warrants are not entitled, by virtue of being such
holders, to receive notice of any meetings of shareholders or otherwise have any
right of shareholders of the Company. However, if at any time after the
Exercisability Date, the Company grants, issues or sells options, convertible
securities, or rights to purchase stock, warrants or other securities pro rata
to the record holders of Common Stock ("Distribution Rights") or, without
duplication, makes any dividend or otherwise makes any distribution, including
(subject to applicable law) pursuant to any plan of liquidation
("Distribution"), on the Common Stock (whether in cash, property, evidences of
indebtedness or otherwise), then the Company shall grant, issue, sell or make to
each registered holder of Warrants then outstanding the aggregate Distribution
Rights or Distribution, as the case may be, which such holder would have
acquired if such holder had held the maximum number of shares of Common Stock
acquirable upon complete exercise of such holder's Warrants (regardless of
whether the Warrants are then exercisable and without giving effect to the
Cashless Exercise option) immediately before the record date for the grant,
issuance or sale of such Distribution Rights or Distribution, as the case may
be, or, if there is no such record date, the date as of which the record holders
of shares of Common Stock are to be determined for the grant, issue or sale of
such Distribution Rights or Distribution, as the case may be.
 
     The number of Warrant Shares issuable upon exercise of a Warrant (the
"Exercise Rate") is subject to adjustment from time to time upon the occurrence
of certain events occurring after the Original Issue Date of the Notes,
including (a) certain dividends or distributions on shares of Common Stock
payable in shares of Common Stock or certain other Capital Stock of the Company,
(b) subdivisions, combinations or certain reclassifications of shares of Common
Stock and (c) sales by the Company of shares of Common Stock or of securities
convertible into or exchangeable or exercisable for shares of Common Stock to an
Affiliate (other than a wholly owned subsidiary) of the Company at a price below
the then Current Market Value (other than (1) pursuant to the exercise of the
Warrants, (2) pursuant to any security convertible into, or exchangeable or
exercisable for, shares of Common Stock outstanding as of the Original Issue
Date, (3) upon the conversion, exchange or exercise of any convertible,
exchangeable or exercisable security as to which the issuance thereof has
previously been the subject of any required adjustment pursuant to the Warrant
Agreement and (4) upon the conversion, exchange or exercise of convertible,
exchangeable or exercisable securities of the Company outstanding on the
Original Issue Date (to the extent in accordance with the terms of such
securities as in
 
                                       104
<PAGE>   106
 
effect on such date)). Notwithstanding the foregoing, no adjustment in the
Exercise Rate will be required upon the conversion, exchange or exercise of
options to acquire shares of Common Stock by officers, directors or employees of
the Company; provided that the exercise price of such options, at the time of
issuance thereof, is at least equal to the then Current Market Value of the
Common Stock underlying such options.
 
     If the Company, in a single transaction or through a series of related
transactions, consolidates with or merges with or into any other person or
sells, assigns, transfers, leases, conveys or otherwise disposes of all or
substantially all of its properties and assets to another person or group of
affiliated persons or is a party to a merger or binding share exchange which
reclassifies or changes its outstanding Common Stock (a "Fundamental
Transaction"), as a condition to consummating any such transaction the person
formed by or surviving any such consolidation or merger if other than the
Company or the person to whom such transfer has been made (the "Surviving
Person") shall enter into a supplemental warrant agreement. The supplemental
warrant agreement shall provide (a) that the holder of a Warrant then
outstanding may exercise it for the kind and amount of securities, cash or other
assets which such holder would have received immediately after the Fundamental
Transaction if such holder had exercised the Warrant immediately before the
effective date of the transaction (regardless of whether the Warrants were then
exercisable and without giving effect to the Cashless Exercise option), assuming
(to the extent applicable) that such holder (i) was not a constituent person or
an affiliate of a constituent person to such transaction, (ii) made no election
with respect thereto and (iii) was treated alike with the plurality of
non-electing holders, and (b) that the Surviving Person shall succeed to and be
substituted for every right and obligation of the Company in respect of the
Warrant Agreement and the Warrants. The Surviving Person shall mail to holders
of Warrants at the addresses appearing on the Warrant Register a notice briefly
describing the supplemental warrant agreement. If the issuer of securities
deliverable upon exercise of Warrants is an affiliate of the Surviving Person,
that issuer shall join in the supplemental warrant agreement.
 
     Notwithstanding the foregoing, if the Company enters into a Fundamental
Transaction with another person (other than a subsidiary of the Company) and
consideration is payable to holders of the shares of Capital Stock (or other
securities or property) issuable or deliverable upon exercise of the Warrants
that are exercisable in exchange for such shares in connection with such
Fundamental Transaction which consists solely of cash, then the holders of
Warrants shall be entitled to receive distributions on the date of such event on
an equal basis with holders of such shares (or other securities issuable upon
exercise of the Warrants) as if the Warrants had been exercised immediately
prior to such event, less the Exercise Price therefor. Upon receipt of such
payment, if any, the rights of a holder of a Warrant shall terminate and cease
and such holder's Warrants shall expire.
 
     In the event of a taxable distribution to holders of Common Stock which
results in an adjustment to the number of shares of Common Stock or other
consideration for which such a Warrant may be exercised, the holders of the
Warrants may, in certain circumstances, be deemed to have received a
distribution subject to United States federal income tax as a dividend. See
"Certain Federal Income Tax Considerations."
 
     Fractional shares of Common Stock are not required to be issued upon
exercise of Warrants, but in lieu thereof the Company will pay a cash
adjustment, except in limited circumstances.
 
     The Warrant Agreement permits, with certain exceptions, the amendment
thereof and the terms of the Warrants and the modification of rights and
obligations of the Company and the rights of the holders of Warrant Certificates
under the Warrant Agreement at any time by the Company and the Warrant Agent
with the consent of the Requisite Warrant Holders (as defined below).
 
CERTAIN COVENANTS
 
     The Company has agreed not to make an Initial Public Equity Offering of any
class of Capital Stock (other than the class of Capital Stock into which the
Warrants are exercisable) without adopting any amendments to the terms of the
Company's Articles of Incorporation that may be necessary to provide that the
Warrant Shares are convertible into such class of Capital Stock on a
share-for-share or other equitable basis and that the rights, conditions and
privileges attaching to such class of Capital Stock are not adverse to holders
of the Warrant Shares.
 
                                       105
<PAGE>   107
 
     The Company has also agreed to comply with all applicable laws, including
the Securities Act and any applicable state securities laws, in connection with
the offer and sale of Common Stock (and other securities and property
deliverable) upon exercise of the Warrants.
 
CERTAIN DEFINITIONS
 
     "Capital Stock" means, with respect to any Person, any and all shares,
interests, partnership interests, participations, rights in or other equivalents
(however designated and whether voting or non-voting) of, such person's capital
stock, and any rights (other than debt securities convertible into capital
stock), warrants or options exchangeable for or convertible into such capital
stock whether outstanding on the Original Issue Date or issued after the
Original Issue Date.
 
     "Common Stock" is defined in the Warrant Agreement to include the Company's
Common Stock, par value $0.01 per share, and any other class or series of common
equity equivalent shares of the Company hereafter created.
 
     "Convertible Preferred Stock" means any securities convertible or
exercisable or exchangeable into Common Stock, whether outstanding on the
Closing Date or thereafter issued.
 
     "Current Market Value" per share of Common Stock or any other security at
any date means (i) if the security is not registered under the Exchange Act, (a)
the value of the security, determined in good faith by the Board of Directors of
the Company and certified in a board resolution, based on the most recently
completed arms-length transaction between the Company and a person other than an
Affiliate of the Company and the closing of which occurs on such date or shall
have occurred within the six-month period preceding such date, or (b) if no such
transaction shall have occurred on such date or within such six-month period,
the fair market value of the security as determined by a nationally or
regionally recognized independent financial expert (provided that, in the case
of the calculation of Current Market Value for determining the cash value of
fractional shares, any such determination within six months that is, in the good
faith judgment of the Board, a reasonable determination of value, may be
utilized) or (ii) (a) if the security is registered under the Exchange Act, the
average of the daily closing sales prices of the securities for the 20
consecutive trading days immediately preceding such date, or (b) if the security
has been registered under the Exchange Act for less than 20 consecutive trading
days before such date, then the average of the daily closing sales prices for
all of the trading days before such date for which closing sales prices are
available, in the case of each of (ii)(a) and (ii)(b), as certified to the
Warrant Agent by the President, any Vice President or the Chief Financial
Officer of the Company. The closing sales price for each such trading day shall
be: (A) in the case of a security listed or admitted to trading on any United
States national securities exchange or quotation system, the closing sales
price, regular way, on such day, or if no sale takes place on such day, the
average of the closing bid and asked prices on such day, (B) in the case of a
security not then listed or admitted to trading on any national securities
exchange or quotation system, the last reported sale price on such day, or if no
sale takes place on such day, the average of the closing bid and asked prices on
such day, as reported by a reputable quotation source designated by the Company,
(C) in the case of a security not then listed or admitted to trading on any
national securities exchange or quotation system and as to which no such
reported sale price or bid and asked prices are available, the average of the
reported high bid and low asked prices on such day, as reported by a reputable
quotation service, or a newspaper of general circulation in the Borough of
Manhattan, The City and State of New York, customarily published on each
business day, designated by the Company, or, if there shall be no bid and asked
prices on such day, the average of the high bid and low asked prices, as so
reported, on the most recent day (not more than 30 days prior to the date in
question) for which prices have been so reported and (D) if there are not bid
and asked prices reported during the 30 days prior to the date in question, the
Current Market Value shall be determined as if the securities were not
registered under the Exchange Act.
 
     "Exercisability Date" is defined in the Warrant Agreement as the first day
on or after the Separability Date on which there shall have occurred an Exercise
Event.
 
     "Exercise Date" means the date when the Warrant Certificate evidencing
Warrants to be exercised and payment in full of the aggregate Exercise Price are
received by the Warrant Agent at or prior to 11:00 a.m. (5:00 p.m. in the event
of exercise on the Expiration Date), New York City time, on a Business Day.
 
                                       106
<PAGE>   108
 
     "Exercise Event" means the date of the occurrence of the earliest of: (i)
the time immediately prior to the occurrence of a Change of Control (as defined
in the Indenture; see "Description of the Notes -- Certain Definitions"),
(ii)(a) the 180th day (or such earlier date as determined by the Company in its
sole discretion) following, the closing of an Initial Public Equity Offering (as
defined) or (b) upon the closing of an Initial Public Equity Offering but only
in respect of Warrants, if any, required to be exercised to permit the holders
thereof to sell Warrant Shares pursuant to their respective registration rights,
(iii) a class of equity securities of the Company is listed on a national
securities exchange or authorized for quotation on the Nasdaq National Market or
is otherwise subject to registration under the Exchange Act, or (iv) September
1, 1999.
 
     "Initial Public Equity Offering" means a primary public offering (whether
or not underwritten, but excluding any offering pursuant to Form S-8 under the
Securities Act or any other publicly registered offering pursuant to the
Securities Act pertaining to an issuance of Common Stock or securities
exercisable therefor under any benefit plan, employee compensation plan, or
employee or director stock purchase plan) of Common Stock pursuant to an
effective registration statement under the Securities Act.
 
     "Registrable Securities" means any of (i) the Common Stock issued and
issuable upon exercise of the Warrants and (ii) any other securities issued or
issuable with respect to the Warrants or Warrant Shares by way of stock dividend
or stock split or in connection with a combination of shares, recapitalization,
merger, consolidation or other reorganization or otherwise. As to any particular
Registrable Securities, such securities shall cease to be Registrable Securities
when (a) a registration statement with respect to the offering of such
securities by the holder thereof shall have been declared effective under the
Securities Act and such securities shall have been disposed of by such holder
pursuant to such registration statement, (b) such securities have been sold to
the public pursuant to, or are eligible for sale to the public without volume or
manner of sale restrictions under, Rule 144(k) (or any similar provision then in
force, but not Rule 144A) promulgated under the Securities Act, (c) such
securities shall have been otherwise transferred and new certificates for such
securities not bearing a legend restricting further transfer shall have been
delivered by the Company or its transfer agent and subsequent disposition of
such securities shall not require registration or qualification under the
Securities Act or any similar state law then in force, or (d) such securities
shall have ceased to be outstanding.
 
     "Requisite Warrant Holders" means (i) in the case of any amendment,
modification, supplement or waiver affecting only Warrant Holders as such,
holders of a majority in number of the outstanding Warrants, voting separately
as a class, or (ii) in the case of any amendment, modification, supplement or
waiver affecting Warrant Holders, a majority in number of Warrant Shares
represented by the Warrants that would be issuable assuming exercise thereof at
the time such amendment, modification, supplement or waiver is voted upon.
 
     "Triggering Date" means the date of the consummation of a bona fide
underwritten public offering of Common Stock, as a result of which at least 20%
of the outstanding shares of Common Stock are listed on a United States national
securities exchange or the Nasdaq National Market.
 
REGISTRATION AND OTHER RIGHTS RELATING TO THE WARRANT SHARES
 
     The Company, the Initial Purchasers and, to the limited extent set forth
therein, the Permitted Holders entered into the Warrant Registration Rights
Agreement, which provides that the holders of Warrants and Registrable
Securities have registration rights and other rights and obligations with
respect to the Warrants and Registrable Securities. The following summary of the
material provisions of the Warrant Registration Rights Agreement does not
purport to be complete and is subject to, and qualified in its entirety by
reference to, all of the provisions of the Warrant Registration Rights
Agreement. The Warrant Registration Rights Agreement has been filed as an
exhibit to the Registration Statement of which this Prospectus is a part, and
copies of such Agreement are available upon request from the Company or the
Warrant Agent.
 
     Registration Rights.  After the occurrence of an Exercise Event, the
holders of a number of Warrants, Warrant Shares and Registrable Securities (the
"Subject Equity") equivalent to at least a majority of the outstanding Subject
Equity will be entitled to require the Company to effect two registrations
(each, a "Demand Registration") under the Securities Act of the Subject Equity,
subject to certain limitations. Within 20 days after the receipt of such demand,
the Company will (a) notify the holders of all Subject Equity that a
 
                                       107
<PAGE>   109
 
demand registration has been requested, (b) prepare, file and use its best
efforts to cause to become effective under the Securities Act within 150 days of
such demand a registration statement in respect of all of the Subject Equity
which holders request, no later than 30 days after the date of such notice, to
have included therein (the "Included Securities"); provided that if such demand
occurs during the "lock up" or "black out" period (not to exceed 180 days)
imposed on the Company pursuant to or in connection with any underwriting or
purchase agreement relating to an underwritten Rule 144A or registered public
offering of Common Stock or securities convertible into or exchangeable or
exercisable for Common Stock, the Company shall not be required to so notify
holders of Subject Equity and file such demand registration statement prior to
the end of such "lock up" or "black out" period, in which event the Company will
use its best efforts to cause such Demand Registration statement to become
effective no later than the later of (i) 150 days after such demand or (ii) 30
days after the end of such "lock up" or "black out" period, and (c) keep such
registration statement continuously effective for the shorter of (i) 60 days
(the "Effectiveness Period") and (ii) such period of time as all of the Subject
Equity included in such registration statement shall have been sold thereunder;
provided further that the Company may postpone the filing of, or suspend the
effectiveness of, any registration statement or amendment thereto, suspend the
use of any prospectus and shall not be required to amend or supplement the
registration statement, any related prospectus or any document incorporated
therein by reference (other than an effective registration statement being used
for an underwritten offering) in the event that and for a period (a "Suspension
Period") not to exceed an aggregate of 90 days with respect to any Demand
Registration if (i) an event or circumstance occurs and is continuing as a
result of which the registration statement, any related prospectus or any
document incorporated therein by reference as then amended or supplemented or
proposed to be filed would, in the Company's good faith judgement, contain an
untrue statement of a material fact or omit to state a material fact necessary
in order to make the statements therein, in the light of the circumstances under
which they were made, not misleading, and (ii)(A) the Company determines in its
good faith judgement that the disclosure of such an event at such time would
have a material adverse effect on the business, operations or prospects of the
Company or (B) the disclosure otherwise relates to a material business
transaction which has not yet been publicly disclosed; provided further that if,
after a Demand Registration has become effective, the offering of Subject Equity
pursuant thereto is or becomes the subject of any stop order, injunction or
other order or requirement of the Commission or similar governmental, judicial
or administrative order or requirement, and such Demand Registration has not
become effective within a reasonable time period thereafter, such Demand
Registration will be deemed not to have been effected; provided further that the
Effectiveness Period shall be extended by the number of days in any Suspension
Period. In the event of any "lock up" or "black out" period in any underwriting
or purchase agreement, the Company will so notify the holders of Registrable
Securities. Under the Warrant Registration Rights Agreement, a Warrant holder is
obligated to keep confidential the existence of a Suspension Period or any
confidential information communicated by the Company to the Warrant holder with
respect thereto. Notwithstanding the foregoing, in lieu of filing and causing to
become effective a Demand Registration, the Company may satisfy its obligation
with respect to such Demand Registration by making and consummating (or having
its designee make and consummate) an offer to purchase all Subject Equity at a
price at least equal to Current Market Value (as defined in the Warrant
Agreement, but without the inclusion of clause (i)(a) thereof) less any
applicable Exercise Price.
 
     Holders of Registrable Securities also have the right to include such
Registrable Securities in any registration statement under the Securities Act
filed by the Company for its own account or for the account of any of its
securityholders covering the sale of Common Stock (other than (a) a registration
statement on Form S-4 or S-8 or (b) a registration statement filed in connection
with an offer of securities solely to existing securityholders or (c) a Demand
Registration) for sale on the same terms and conditions as the securities of the
Company or any other selling securityholder included therein (a "Piggy-Back
Registration"). In the case of a Piggy-Back Registration, the number of
Registrable Securities requested to be included therein is subject to pro rata
reduction to the extent that the Company is advised by the managing underwriter,
if any, therefor that the total number or type of Registrable Securities and
other securities proposed to be included therein pursuant to similar piggyback
registration rights of other holders is such as to materially and adversely
affect the success of the offering; provided that securities included pursuant
to other holders' demand registration rights are not to be included in any such
reduction. The provisions in the preceding paragraph relating to the
 
                                       108
<PAGE>   110
 
effect of a Suspension Period and the imposition of any "lock-up" or "black-out"
period on a related registration statement will also apply to such holder upon
exercise of Piggy-Back Registration Rights.
 
     If the Company has complied with all its obligations under the Warrant
Registration Rights Agreement with respect to a Demand Registration or a
Piggy-Back Registration relating to an underwritten public offering, all holders
of Warrants and Registrable Securities, upon request of the lead managing
underwriter with respect to such underwritten public offering, will be required
to not sell or otherwise dispose of any Warrant or Registrable Security owned by
them for a period not to exceed 30 days prior to or 180 days after the
consummation of such underwritten public offering.
 
     The Warrant Registration Rights Agreement includes customary covenants on
the part of the Company and will provide that the Company will indemnify the
holders of Registrable Securities included in any registration statement and any
underwriter with respect thereto against certain liabilities, including
liabilities under the Securities Act.
 
     Each holder of Warrants that sells such Warrants or Registrable Securities
pursuant to a Demand Registration generally may be required to be named as a
selling securityholder in the related prospectus and to deliver a prospectus to
the purchaser, will be subject to certain of the civil liability provisions
under the Securities Act in connection with such sales and will be bound by
certain provisions of the Warrant Registration Rights Agreement which are
applicable to such holder (including certain indemnification obligations). In
addition, each holder of Warrants will be required to deliver information to be
used in connection with any such registration in order to have its Warrants or
Registrable Securities included in such registration.
 
     Tag-Along Rights.  Prior to the Triggering Date, each of the holders of
Subject Equity shall have the right (the "Tag-Along Right") to require the
proposed purchaser (as defined below) to purchase from each of them all Subject
Equity owned by such holder in the event of any proposed direct or indirect sale
or other disposition (collectively, a "Transfer") of Common Stock or Convertible
Preferred Stock (whether now or hereafter issued) to any person or persons (such
other person or persons being hereinafter referred to as the "proposed
purchaser") by any Permitted Holders or any of their Affiliates in any
transaction or a series of related transactions resulting in a Change of
Control. Any Subject Equity purchased from the holders pursuant to such
provisions shall be paid for in the same type of consideration and at the same
price per share of Common Stock and upon the same terms and conditions of such
proposed transfer of Common Stock by any Permitted Holders or any of their
Affiliates; except that the price per Warrant to be paid by the proposed
purchaser shall be less the exercise price of such Warrant per share. If the
Subject Equity to be purchased includes securities or property other than Common
Stock, the price to be paid for such securities or property shall be the same
price per share or other denomination paid by the proposed purchaser for like
securities purchased from any Permitted Holder or any of its Affiliates or, if
like securities are not purchased from any Permitted Holder or any of its
Affiliates, the fair market value of such securities determined by a nationally
or regionally recognized investment banking firm selected by the Company.
 
     Each Permitted Holder shall notify, or cause to be notified, each holder of
Subject Equity and in writing of each such proposed Transfer at least 30 days
prior to the date thereof. Such notice shall set forth: (a) the name and address
of the proposed purchaser and the number of shares of Common Stock and other
securities, if any, proposed to be transferred, (b) the proposed amount of
consideration and terms and conditions of payment offered by such proposed
purchaser (if the proposed consideration is not cash, the notice shall describe
the terms of the proposed consideration) and (c) that either the proposed
purchaser has been informed of the Tag-Along Right and has agreed to purchase
Subject Equity in accordance with the terms of the Warrant Registration Rights
Agreement or that the Permitted Holder or any of its Affiliates will make such
purchase. The Tag-Along Right may be exercised by any holder of Subject Equity
by delivery of a written notice to the Company (the "Tag-Along Notice"), within
10 days following such holder's receipt of the notice specified in the preceding
sentence. The Tag-Along Notice shall state the amount of Subject Equity that
such holder proposes to include in such transfer to the proposed purchaser
determined as aforesaid. Failure to provide a Tag-Along Notice within the 10 day
notice period shall be deemed to constitute an election by such holder not to
exercise its Tag-Along Rights.
 
                                       109
<PAGE>   111
 
     In the event that the proposed purchaser does not purchase Subject Equity
entitled to be transferred as described above on the same terms and conditions
as purchased from the Permitted Holders or any of their Affiliates, then the
Permitted Holders or their Affiliates shall purchase such Subject Equity if the
Transfer occurs. If any Subject Equity is being sold by a Warrant Holder
pursuant to the Tag-Along Right under the Warrant Registration Rights Agreement,
upon the occurrence of a Change of Control triggered by the sale of Common Stock
by a Permitted Holder, the other Permitted Holder will have the right to
purchase up to 50% of such Subject Equity.
 
     Drag-Along Rights.  If at any time prior to an Initial Public Equity
Offering, any Permitted Holders or any of their respective Affiliates determines
to sell all of the Capital Stock of the Company owned by them to a person other
than a Permitted Holder or its Affiliate in a transaction resulting in a Change
of Control, the transferring Permitted Holder (whether directly or through an
Affiliate) shall have the right (the "Drag-Along Right") to require the holders
of Subject Equity to sell such Subject Equity to such transferee; provided that
(a) the consideration to be received by the holders of Subject Equity shall be
the same type of consideration received by the Permitted Holders and their
Affiliates and, in any event, shall be cash or freely transferable marketable
securities, and (b) after giving effect to such transaction, the Permitted
Holder making the transfers and its Affiliates shall not own, directly or
indirectly, any capital stock or rights to purchase capital stock of the
Company. Any Warrants and/or Registrable Securities purchased from the holders
thereof pursuant to such provision shall be paid for at the same price per share
of Common Stock and upon the same terms and conditions of such proposed transfer
of Common Stock by the Permitted Holders and their Affiliates. The price per
Warrant to be paid by the proposed purchaser shall be less the exercise price of
such Warrant per share. If the Subject Equity to be purchased includes
securities other than Common Stock, the price to be paid for such securities
shall be the same price per share or other denomination paid by the proposed
purchaser for like securities purchased from the Permitted Holders and their
Affiliates or, if like securities are not purchased from the Permitted Holders
and their Affiliates, the fair market value of such securities determined by a
nationally or regionally recognized investment banking firm selected by the
Company.
 
     If any Subject Equity is being sold by a Warrant Holder pursuant to the
Drag-Along Right under the Warrant Registration Rights Agreement, upon the
occurrence of a Change of Control triggered by the sale of Common Stock by a
Permitted Holder, the other Permitted Holder will have the right to purchase up
to 50% of such Subject Equity.
 
                         BOOK-ENTRY; DELIVERY AND FORM
 
     The certificates representing the Exchange Notes will be issued in fully
registered form without interest coupons. Exchange Notes issued in exchange for
Private Notes sold in offshore transactions in reliance on Regulation S under
the Securities Act will be represented by one or more global Notes in
definitive, fully registered form without interest coupons (each a "Regulation S
Global Note").
 
     Exchange Notes issued in exchange for Private Notes sold in reliance on
Rule 144A will be represented by one or more permanent global Notes (each a
"Registered Global Note" and, together with the Regulation S Global Note, the
"Global Notes") in definitive, fully registered form and, without interest
coupons and will be deposited with the Trustee or as custodian for The
Depository Trust Company (the "Depositary"), and registered in the name of the
Depositary or of a nominee of the Depositary.
 
     Upon issuance of the Global Note, the Depositary will credit, on its
internal system, the respective amounts of the individual beneficial interests
in the Global Note as applicable, to persons who have accounts with the
Depositary ("Participants"). Such accounts initially will be designated by or on
behalf of the Initial Purchasers. Ownership of beneficial interests in the
Global Note will be shown on, and the transfer of such beneficial interests will
be effected only through, records maintained by the Depositary or its nominee
(with respect to interests of Participants) and the records of Participants
(with respect to interests of persons other than Participants). Qualified
Institutional Buyers may hold their interests in the Global Note directly
through the Depositary if they are Participants, or indirectly through
organizations which are Participants.
 
                                       110
<PAGE>   112
 
     Investors may hold their interests in a Regulation S Global Note directly
through Cedel Bank or Euroclear, if they are participants in such systems, or
indirectly through organizations that are participants in such system. Investors
may also hold such interests through organizations other than Cedel Bank or
Euroclear that are participants in the DTC system. Cedel Bank and Euroclear will
hold interests in the Regulation S Global Note on behalf of their participants
through DTC.
 
     So long as the Depositary, or its nominee, is the registered owner or
holder of the Global Note, the Depositary or such nominee, as the case may be,
will be considered the sole owner and holder of the Notes represented by such
Global Note for all purposes under the Indenture and the Notes. Accordingly,
beneficial owners of an interest in the Global Note must rely on the procedures
of the Depositary and, if such person is not a Participant, on the procedures of
the Participant through which such person owns its interest, to exercise any
rights and fulfill any obligations of a holder under the Indenture. No
beneficial owner of an interest in the Global Note will be able to transfer such
interest except in accordance with the Depositary's procedures, in addition to
those provided for under the Indenture.
 
     Payments of the principal of or premium, if any, and interest on the Global
Notes will be made to the Depositary or its nominee, as the case may be, as the
registered owner thereof. None of the Company, the Trustee, or any paying agent
under the Indenture will have any responsibility or liability for any aspect of
the records relating to or payments made on account of beneficial ownership
interests in the Global Note or for maintaining, supervising or reviewing any
records relating to such beneficial ownership interests.
 
     The Company expects that the Depositary or its nominee, upon receipt of any
payment of the principal of, premium and interest on (or additional interest in
respect of) the Global Note will credit Participants' accounts with payments in
amounts proportionate to their respective beneficial interests in the principal
amount at maturity of such Global Note as shown on the records of the Depositary
or its nominee. The Company also expects that payments by Participants to owners
of beneficial interests in the Global Note held through such Participants will
be governed by standing instructions and customary practice as is now the case
with securities held for the accounts of customers registered in the names of
nominees for such customers. Such payments will be the responsibility of such
Participants.
 
     Transfers between Participants in the Depositary will be effected in the
ordinary way through the Depositary's same-day funds system in accordance with
the Depositary rules and will be settled in federal funds. Transfers between
participants in Euroclear and Cedel Bank will be effected in the ordinary way in
accordance with their respective rules and operating procedures. If a holder
requires physical delivery of a Certificated Security for any reason, including
to sell Notes to persons in states which require physical delivery of the Notes
or to pledge such securities, such holder must transfer its interest in the
Global Note in accordance with the normal procedures of the Depositary and with
the procedures set forth in the Indenture.
 
     The Depositary has advised the Company that the Depositary will take any
action permitted to be taken by a holder of Notes (including the presentation of
Notes for exchange as described below) only at the direction of one or more
Participants to whose account the Depositary interests in the applicable Global
Securities are credited and only in respect of such portion of the aggregate
principal amount at maturity of Notes as to which such Participant or
Participants has or have given such direction. However, if there is an Event of
Default under the Indenture, the Depositary will exchange the Global
Certificates for the applicable Certificated Securities, which it will
distribute to its Participants.
 
     The Depositary has advised the Company as follows: the Depositary is a
limited purpose trust company organized under the laws of the State of New York,
a "banking organization" within the meaning of New York Banking Law, a member of
the Federal Reserve System, a "clearing corporation" within the meaning of the
Uniform Commercial Code and a "clearing agency" registered pursuant to the
provisions of Section 17A of the Exchange Act. The Depositary was created to
hold securities for its Participants and facilitate the clearance and settlement
of securities transactions between Participants through electronic book-entry
changes in accounts of its Participants, thereby eliminating the need for
physical movement of certificates. Participants include securities brokers and
dealers, banks, trust companies and clearing corporations and certain other
organizations. Indirect access to the DTC system is available to others such as
banks, brokers,
 
                                       111
<PAGE>   113
 
dealers and trust companies that clear through or maintain a custodial
relationship with a Participant, either directly or indirectly ("Indirect
Participants").
 
     Although DTC and its Participants have agreed to the foregoing procedures
in order to facilitate transfers of interests in the Global Note among
Participants and participants of Euroclear and Cedel Bank, they are under no
obligation to perform such procedures, and such procedures may be discontinued
at any time. Neither the Company nor the Trustee, or any paying agent will have
any responsibility for the performance by the Depositary, Euroclear or Cedel
Bank or their respective participants or indirect participants of their
respective obligations under the rules and procedures governing their
operations.
 
   
     Except as set forth below, each of the Exchange Notes will be issued in the
form of one or more Global Notes. Owners of beneficial interests in the Global
Note will be entitled to receive Notes in definitive form ("Definitive Notes")
if the Depositary is at any time unwilling or unable to continue as, or ceases
to be, a "Clearing Agency" registered under Section 17A of the Exchange Act, and
a successor to the Depositary registered as a "Clearing Agency" under Section
17A of the Exchange Act is not appointed by the Company within 90 days. Any
Definitive Notes issued in exchange for beneficial interests in the Global Note
will be registered in such name or names as the Depositary shall instruct the
Trustee. It is expected that such instructions will be based upon directions
received by the Depositary from Participants with respect to ownership of
beneficial interests in the Global Note.
    
 
     In addition to the foregoing, on or after the occurrence of an Event of
Default under the Indenture, owners of beneficial interests in the Global Note
will be entitled to request and receive Definitive Notes. Such Definitive Notes
will be registered in such name or names as the Depositary shall instruct the
Trustee.
 
            CERTAIN UNITED STATES FEDERAL INCOME TAX CONSIDERATIONS
 
   
     The following discussion describes the material United States federal
income tax consequences of an exchange of Private Notes for Exchange Notes and
the ownership of Private Notes, as well as certain potential federal income tax
consequences to the Company with respect to the Notes. This summary is based on
current provisions of the U.S. Internal Revenue Code of 1986, as amended (the
"Code"), applicable final, temporary and proposed Treasury Regulations
("Treasury Regulations"), judicial authority, and current administrative rulings
and pronouncements of the Internal Revenue Service (the "Service") and upon the
facts concerning the Company as of the date hereof. There can be no assurance
that the Service will not take a contrary view, and no ruling from the Service
has been or will be sought by the Company. Legislative, judicial, or
administrative changes or interpretations may be forthcoming that could alter or
modify the statements and conclusions set forth herein. Any such changes or
interpretations may or may not be retroactive and could affect the tax
consequences to holders.
    
 
     This summary does not purport to deal with all aspects of taxation that may
be relevant to particular holders of the Notes in light of their personal
investment or tax circumstances, or to certain types of investors (including
individual retirement accounts and other tax deferred accounts, insurance
companies, financial institutions, broker-dealers or tax-exempt organizations)
subject to special treatment under the U.S. federal income tax laws. This
discussion does not deal with special tax situations, such as the holding of the
Notes as part of a straddle with other investments, or situations in which the
functional currency of a holder is not the U.S. dollar. In addition, this
discussion deals only with Notes held by initial purchasers that hold such Notes
as capital assets within the meaning of Section 1221 of the Code.
 
     For purposes of this discussion, the term "U.S. Holder" means a citizen or
resident of the U.S., a corporation, limited liability company or partnership
created or organized in the U.S. or under the law of the U.S. or any state
thereof (including the District of Columbia), an estate the income of which is
includible in gross income for U.S. federal income tax purposes regardless of
its source, or a trust if a court within the U.S. is able to exercise primary
supervision over the administration of the trust and one or more U.S. persons
have the authority to control all substantial decisions of the trust (or, under
certain circumstances, a trust the income of which is includible in gross income
for U.S. federal income tax purposes regardless of its source). The term
"Non-U.S. Holder" means any person other than a U.S. Holder.
 
                                       112
<PAGE>   114
 
THE FOLLOWING DISCUSSION IS FOR GENERAL INFORMATION ONLY. THE TAX TREATMENT MAY
VARY DEPENDING UPON A HOLDER'S PARTICULAR SITUATION. HOLDERS SHOULD CONSULT
THEIR OWN TAX ADVISORS AS TO THE PARTICULAR TAX CONSEQUENCES TO THEM OF
PURCHASING, HOLDING AND DISPOSING OF THE NOTES INCLUDING THE APPLICABILITY AND
EFFECT OF ANY STATE, LOCAL OR FOREIGN TAX LAWS.
 
EXCHANGE OF PRIVATE NOTES
 
   
     There will be no federal income tax consequences to holders exchanging
Private Notes for Exchange Notes pursuant to the Exchange Offer since the
Exchange Offer will be by operation of the original terms of the Private Notes,
pursuant to a unilateral act by the Company, and will not result in any material
alteration in the terms of the Private Notes. Each exchanging holder will have
the same adjusted tax basis and holding period in the Exchange Notes as it had
in the Private Notes immediately before the exchange.
    
 
THE NOTES
 
     Under applicable authorities, the Notes should be treated as indebtedness
for U.S. federal income tax purposes. In the unlikely event the Notes are
treated as equity, the amount of any actual or constructive distributions on any
such Note would first be taxable to the holder as dividend income to the extent
of the issuer's current and accumulated earnings and profits, and next would be
treated as a return of capital to the extent of the holder's tax basis in the
Note, with any remaining amount treated as gain from the sale of a Note.
Further, payments on the Notes treated as equity to Non-U.S. Holders would not
be eligible for the portfolio interest exception from U.S. withholding tax, and
dividends thereon would be subject to U.S. withholding tax at a flat rate of 30%
(or lower applicable treaty rate) and gain from their sale or other taxable
disposition might also be subject to U.S. tax. See "-- Non-U.S. Holders." In
addition, in the event of equity treatment, the Company would not be entitled to
deduct interest on the Notes for U.S. federal income tax purposes. The remainder
of this discussion assumes that the Notes will constitute indebtedness of the
Company for such tax purposes.
 
     ORIGINAL ISSUE DISCOUNT
 
     General. The Notes will be issued with original issue discount ("OID"), and
each U.S. Holder will be required to include in income (regardless of whether
such U.S. Holder is a cash or accrual basis taxpayer) in each taxable year, in
advance of the receipt of corresponding cash payments on such Notes, that
portion of the OID, computed on a constant yield basis, attributable to each day
during such year on which the U.S. Holder held the Notes. See " -- Taxation of
Original Issue Discount."
 
     The amount of OID with respect to each Note will be equal to the excess of
(i) its "stated redemption price at maturity" over (ii) its issue price. Under
the OID Regulations, the "stated redemption price at maturity" of each Note will
include all payments to be made in respect thereof, including any stated
interest payments, other than "qualified stated interest." Payments of qualified
stated interest are payments of interest which are unconditionally payable in
cash or property (other than debt instruments of the issuer) at least annually
at a qualifying rate, including a single fixed rate. Since no actual cash
payments will be made in respect of the Notes until March 1, 2003, no interest
payments on the Notes will constitute "qualified stated interest."
 
     Taxation of Original Issue Discount. A U.S. Holder of a debt instrument
issued with OID is required to include in gross income for U.S. federal income
tax purposes an amount equal to the sum of the "daily portions" of such OID for
all days during the taxable year on which the holder holds the debt instrument.
The daily portions of OID required to be included in a holder's gross income in
a taxable year will be determined upon a constant-yield basis by allocating to
each day during the taxable year on which the holder holds the debt instrument a
pro-rata portion of the OID on such debt instrument which is attributable to the
"accrual period" in which such day is included. Accrual periods with respect to
a Note may be of any length and may vary in length over the term of the Note as
long as (i) no accrual period is longer than one year and (ii) each scheduled
payment of interest or principal on the Note occurs on either the final or first
day of an accrual
 
                                       113
<PAGE>   115
 
period. The amount of the OID attributable to each "accrual period" will be the
product of the "adjusted issue price" at the beginning of such accrual period
and the "yield to maturity" of the debt instrument (stated in a manner
appropriately taking into account the length of the accrual period). The "yield
to maturity" is the discount rate that, when used in computing the present value
of all payments to be made under the Notes, produces an amount equal to the
issue price of the Notes. The "adjusted issue price" of a debt instrument at the
beginning of an accrual period is defined generally as the issue price of the
debt instrument plus the aggregate amount of OID that accrued in all prior
accrual periods, less any cash payments on the debt instrument. Accordingly, a
U.S. Holder of a Note will be required to include OID in gross income for U.S.
federal income tax purposes in advance of the receipt of cash in respect of such
income. The amount of OID allocable to an initial short accrual period may be
computed using any reasonable method if all other accrual periods, other than a
final short accrual period, are of equal length. The amount of OID allocable to
the final accrual period at maturity of the Note is the difference between (x)
the amount payable at the maturity of the Note, and (y) the Note's adjusted
issue price as of the beginning of the final accrual period.
 
     Effect of Mandatory and Optional Redemptions on OID. In the event of a
Change of Control, the Company will be required to offer to redeem all of the
Notes at redemption prices specified elsewhere herein. In the event that the
Company receives net proceeds from one or more Equity Offerings, the Company
may, at any time prior to March 1, 2001, use all or a portion of such net
proceeds to redeem the Notes in amounts and at redemption prices specified
elsewhere herein. Under the OID Regulations, computation of yield and maturity
of the Notes is not affected by such redemption rights and obligations if, based
on all the facts and circumstances as of the issue date, the potential
occurrence of such contingencies is remote. The Company has determined that,
based on all of the facts and circumstances that are expected to exist as of the
issue date, the possibility that a Change of Control or an optional redemption
by the Company will occur is remote and, as a result, the stated payment
schedule of the Notes must not be adjusted for such contingencies.
 
     The Company may redeem the Notes, in whole or in part, at any time on or
after March 1, 2003, at redemption prices specified elsewhere herein, plus
accrued and unpaid interest to the date of redemption. The OID Regulations
contain rules for determining the "maturity date" and the stated redemption
price at maturity of an instrument that may be redeemed prior to its stated
maturity date at the option of the issuer. Under the OID Regulations, solely for
purposes of the accrual of OID, it is assumed that the issuer will exercise any
option to redeem a debt instrument if such exercise will lower the
yield-to-maturity of the debt instrument. The Company anticipates that it will
not be presumed to redeem the Notes prior to their stated maturity under the
foregoing rules because the exercise of such option would not lower the
yield-to-maturity of the Notes.
 
  APPLICABLE HIGH YIELD DISCOUNT OBLIGATIONS
 
   
     The Notes are "applicable high yield discount obligations" ("AHYDOs"), as
defined in the Code, and the following rules will apply. Under the rules
applicable to AHYDOs, a portion of the OID that accrues on the Notes will not be
deductible by the Company at any time. The non-deductible portion of the OID
will be an amount that bears the same ratio to such OID as (i) the excess of the
yield to maturity of the Notes over the applicable federal rate in effect under
Section 1274(d) of the Code plus six percentage points bears to (ii) the yield
to maturity of the Notes. To the extent that the non-deductible portion of OID
would have been treated as a dividend if it had been distributed with respect to
the Company's stock, it will be treated as a dividend to holders of the Notes
for purposes of the rules relating to the dividends received deduction for
corporate holders. Any remaining OID on the Notes will not be deductible by the
Company until such OID is paid.
    
 
     MARKET DISCOUNT, ACQUISITION PREMIUM
 
     If a U.S. Holder acquires a Note for an amount that is less than its
revised issue price (generally, adjusted issue price at the time of
acquisition), the amount of the difference will be treated as "market discount,"
unless such difference is less than a specified de minimis amount. Under the
market discount rules of the Code, a U.S. Holder will be required to treat any
principal payment on, or any gain on the sale,
 
                                       114
<PAGE>   116
 
exchange, retirement or other disposition (including a gift) of, a Note as
ordinary income to the extent of any accrued market discount that has not
previously been included in income. Market discount generally accrues on a
straight-line basis over the remaining term of the Note, unless the U.S. Holder
elects to accrue market discount on a constant interest method. A U.S. Holder
may not be allowed to deduct immediately all or a portion of the interest
expense on any indebtedness incurred or continued to purchase or to carry such
Note.
 
     A U.S. Holder may elect to include market discount in income currently as
it accrues (either on a straight-line basis or, if the U.S. Holder so elects, on
a constant-yield basis), in which case the interest deferral rule set forth in
the preceding paragraph will not apply. Such an election will apply to all bonds
acquired by the U.S. Holder on or after the first day of the first taxable year
to which such election applies and may be revoked only with the consent of the
Service.
 
     A U.S. Holder that acquires a Note for an amount that is greater than the
adjusted issue price of such Note but equal to or less than the sum of all
amounts payable on such Note after the purchase date will be considered to have
purchased such Note at an "acquisition premium." Under the acquisition premium
rules of the Code and the OID Regulations, the daily portion of OID which such
holder must include in its gross income with respect to such Note for any
taxable year will be reduced by an amount equal to the OID multiplied by a
fraction, the numerator of which is the amount of such acquisition premium and
the denominator of which is the OID remaining from the date the Note was
purchased to its maturity date.
 
     SALE OR OTHER DISPOSITION
 
     In general, upon the sale, exchange or redemption of a Note, a U.S. Holder
will recognize taxable gain or loss equal to the difference between (i) the
amount of cash proceeds and the fair market value of any property received on
the sale, exchange or redemption (not including any amount attributable to
accrued but unpaid interest) and (ii) the U.S. Holder's adjusted tax basis in
the Note. A U.S. Holder's adjusted tax basis in a Note generally will be equal
to the portion of the Unit purchase price allocable to such Note, increased by
the amount of any market discount or OID previously taken into income by the
U.S. Holder and reduced by the amount of any principal received by the U.S.
Holder.
 
   
     Subject to the discussion of market discount above, gain or loss realized
on the sale, exchange or redemption of a Note will be capital gain or loss.
Capital gain recognized by individual U.S. Holders generally will be subject to
a maximum federal income tax rate of (i) 39.6% if the U.S. Holder held the Note
for not more than one year, (ii) 28% if the U.S. Holder held the Note for more
than one year but not more than eighteen months, and (iii) 20% if the U.S.
Holder held the Note for more than eighteen months (pending legislation, if
enacted, will eliminate the 18-month holding period, thereby applying the 20%
rate to the taxable sale of the Notes held for more than one year, effective for
taxable years ending after December 31, 1997). The distinction between capital
gain or loss and ordinary income or loss is also relevant for purposes of, among
other things, limitations with respect to the deductibility of capital losses.
    
 
     An exchange of Notes pursuant to the Exchange Offer and the associated
redemption of the Notes by the Company in exchange for the Exchange Notes should
not be considered a taxable event.
 
NON-U.S. HOLDERS
 
     In general, subject to the discussion below concerning backup withholding:
 
     (a) payments of principal or interest (including OID) on the Notes by the
Company or any paying agent to a beneficial owner of a Note that is a Non-U.S.
Holder will not be subject to U.S. withholding tax, provided that, in the case
of interest or accrued OID, (i) such Non-U.S. Holder does not own, actually or
constructively, 10% or more of the total combined voting power of all classes of
stock of the Company entitled to vote, within the meaning of Section 871(h)(3)
of the Code, (ii) such Non-U.S. Holder is not a "controlled foreign corporation"
(within the meaning of the Code) that is related, directly or indirectly, to the
Company through stock ownership, (iii) such Non-U.S. Holder is not a bank
receiving interest described in Section 881(c)(3)(A) of the Code, and (iv) the
certification requirements under Section 871(h) or Section 881(c) of the Code
and Treasury Regulations thereunder (summarized below) are satisfied;
 
                                       115
<PAGE>   117
 
     (b) A Non-U.S. Holder of a Note will not be subject to U.S. income tax on
gains realized on the sale, exchange or other disposition of such Note, unless
(i) such Non-U.S. Holder is an individual who is present in the U.S. for 183
days or more in the taxable year of sale, exchange or other disposition, and
certain other conditions are met, (ii) such gain is effectively connected with
the conduct by the Non-U.S. Holder of a trade or business in the U.S. and, if
certain tax treaties apply, is attributable to a U.S. permanent establishment
maintained by the Non-U.S. Holder, or (iii) the Non-U.S. Holder is subject to
Code provisions applicable to certain U.S. expatriates;
 
     (c) a Note held by an individual who is not a citizen or resident of the
U.S. at the time of his death will not be subject to U.S. estate tax as a result
of such individual's death, provided that, at the time of such individual's
death, the individual does not own, actually or constructively, 10% or more of
the total combined voting power of all classes of stock of the Company entitled
to vote and payments with respect to such Note would not have been effectively
connected with the conduct by such individual of a trade or business in the
U.S.; and
 
     To satisfy the certification requirements referred to in (a)(iv) above,
Sections 871(h) and 881(c) of the Code and currently effective Treasury
Regulations thereunder require that either (i) the beneficial owner of a Note
must certify, under penalties of perjury, to the Company or its paying agent, as
the case may be, that such owner is a Non-U.S. Holder and must provide such
owner's name and address, and U.S. taxpayer identification number ("TIN"), if
any, or (ii) a securities clearing organization, bank or other financial
institution that holds customers securities in the ordinary course of its trade
or business (a "Financial Institution") and holds the Note on behalf of the
beneficial owner thereof must certify, under penalties of perjury, to the
Company or its paying agent, as the case may be, that such certificate has been
received from the beneficial owner and must furnish the payor with a copy
thereof. A certificate described in this paragraph is effective only with
respect to payments of interest made to the certifying Non-U.S. Holder after
delivery of the certificate in the calendar year of its delivery and the two
immediately succeeding calendar years. Under temporary Treasury Regulations,
such requirement will be fulfilled if the beneficial owner of a Note certifies
on IRS Form W-8, under penalties of perjury, that it is a Non-U.S. Holder and
provides its name and address, and any Financial Institution holding the Note on
behalf of the beneficial owner files a statement with the withholding agent to
the effect that it has received such a statement from the beneficial owner (and
furnishes the withholding agent with a copy thereof).
 
     Treasury Regulations released on October 6, 1997 as modified by Notice
98-16 dated March 27, 1998 (the "New Regulations") and effective for payments
made after December 31, 1999, subject to certain transition rules, provide
alternative methods for satisfying the certification requirements described
above. The New Regulations require, in the case of Notes held by a foreign
partnership, that (i) the certification be provided by the partners rather than
by the foreign partnership and (ii) the partnership provide certain information,
including a U.S. taxpayer identification number. A look-through rule would apply
in the case of tiered partnerships.
 
     If a Non-U.S. Holder of a Note is engaged in a trade or business in the
U.S. and if interest (including OID) on the Note, or gain realized on the sale,
exchange or other disposition of the Note, is effectively connected with the
conduct of such trade or business and, if certain tax treaties apply, is
attributable to a U.S. permanent establishment maintained by the Non-U.S. Holder
in the U.S., the Non-U.S. Holder, although exempt from U.S. withholding tax
(provided that the certification requirements discussed in the next sentence are
met), will generally be subject to regular U.S. income tax on such interest or
gain in the same manner as if it were a U.S. Holder. In lieu of the certificate
described above, such a Non-U.S. Holder will be required, under currently
effective Treasury Regulations, to provide the Company with a properly executed
IRS Form 4224 in order to claim an exemption from U.S. withholding tax. In
addition, if such Non-U.S. Holder is a foreign corporation, it may be subject to
a branch profits tax equal to 30% (or such lower rate provided by an applicable
treaty) of its effectively connected earnings and profits for the taxable year,
subject to certain adjustments. For purposes of the branch profits tax, interest
(including OID) on a Note and any gain recognized on the sale, exchange or other
disposition of a Note will be included in the earnings and profits of such
Non-U.S. Holder if such interest or gain is effectively connected with the
conduct by a Non-U.S. Holder of a trade or business in the U.S. The New
Regulations alter certain of the withholding reporting and
 
                                       116
<PAGE>   118
 
certification requirements described above, effective for payments made after
December 31, 1999, subject to certain transition rules. In general, for payments
made after December 31, 1999, a Non-U.S. Holder with effectively connected
income must provide to the Company, either directly or through an intermediary,
a valid IRS Form W-8 to claim an exemption from withholding.
 
     Dividends, if any, paid on Common Stock to a Non-U.S. Holder generally will
be subject to a 30% United States federal withholding tax, subject to reduction
for Non-U.S. Holders eligible for the benefits of certain income tax treaties,
or that qualify as being engaged in a trade or business in the U.S. and if any
dividends received are effectively connected with such trade or business (as
discussed above in connection with the treatment of a Non-U.S. Holder's receipt
of interest on the Notes). For purposes of determining whether tax is to be
withheld at a 30% rate or at a reduced rate as specified by an income tax
treaty, the Company ordinarily will presume that dividends paid to an address in
a foreign country are paid to a resident of such country absent knowledge that
such presumption is not warranted. For dividend payments after December 31,
1999, under the New Treasury Regulations, Non-U.S. Holders are required to
provide a valid Form W-8 to the Company in order to receive the benefit of a
reduced treaty rate. Common Stock owned or treated as owned by an individual who
is not a citizen or resident of the U.S. (as specially defined for United States
federal estate tax purposes) will be included in such individual's estate for
U.S. federal estate tax purposes unless an applicable estate tax treaty
otherwise applies.
 
     In the unlikely event the Notes were treated as equity, the periodic
distributions received by a Non-U.S. Holder on the Notes would not qualify for
the portfolio interest exemption from United States federal income tax and would
instead be treated as dividends as described above.
 
     Non-U.S. Holders should consult with their tax advisors regarding U.S. and
foreign tax consequences with respect to the Notes.
 
BACKUP WITHHOLDING AND INFORMATION REPORTING
 
     Backup withholding of U.S. federal income tax at a rate of 31% may apply to
payments made in respect of a Note to a holder that is not an "exempt recipient"
and that fails to provide certain identifying information (such as the holder's
TIN) in the manner required. Generally, individuals are not exempt recipients,
whereas corporations and certain other entities are exempt recipients. Payments
made in respect of a Note must be reported to the Service, unless the holder is
an exempt recipient or otherwise establishes an exemption.
 
     In the case of payments of interest on a Note to a Non-U.S. Holder,
Treasury Regulations provide that backup withholding and information reporting
will not apply to payments with respect to which either requisite certification
has been received or an exemption has otherwise been established (provided that
neither the Company nor a paying agent has actual knowledge that the holder is a
U.S. Holder or that the conditions of any other exemption are not in fact
satisfied).
 
     Payments of the proceeds of the sale of a Note to or through a foreign
office of a broker that is a U.S. person, a "controlled foreign corporation"
(within the meaning of the Code), or a foreign person, 50% or more of whose
gross income from all sources for the three-year period ending with the close of
its taxable year preceding the payment was effectively connected with the
conduct of a trade or business within the U.S., or (pursuant to the New
Regulations, for payments made after December 31, 1999) a foreign partnership
with certain U.S. connections, are currently subject to certain information
reporting requirements, unless the payee is an exempt recipient or such broker
has evidence in its records that the payee is a Non-U.S. Holder and has no
actual knowledge that such evidence is false and certain other conditions are
met. Temporary Treasury Regulations indicate that such payments are not
currently subject to backup withholding. Under current Treasury Regulations,
payments of the proceeds of a sale of a Note to or through the U.S. office of a
broker will be subject to information reporting and backup withholding unless
the payee certifies under penalties of perjury as to his or her status as a
Non-U.S. Holder and satisfies certain other qualifications (and no agent or
broker who is responsible for receiving or reviewing such statement has actual
knowledge that it is incorrect) and provides his or her name and address or the
payee otherwise establishes an exemption.
 
                                       117
<PAGE>   119
 
     Any amounts withheld under the backup withholding rules from a payment to a
holder of a Note generally will be allowed as a refund or credit against such
holder's U.S. federal income tax, provided that the required information is
timely furnished to the Service.
 
     In general, the New Regulations do not significantly alter the current
substantive withholding and information reporting requirements but unify current
certification procedures and forms and clarify reliance standards. Under the New
Regulations, special rules apply which permit the shifting of primary
responsibility for withholding to certain financial intermediaries acting on
behalf of beneficial owners. A holder of a Note should consult with its tax
advisor regarding the application of the backup withholding rules to its
particular situation, the availability of an exemption therefrom, the procedure
for obtaining such an exemption, if available, and the impact of the New
Regulations on payments made with respect to Notes after December 31, 1999.
 
     THE FOREGOING SUMMARY DOES NOT DISCUSS ALL ASPECTS OF UNITED STATES FEDERAL
INCOME TAXATION THAT MAY BE RELEVANT TO A PARTICULAR HOLDER OF NOTES IN LIGHT OF
ITS PARTICULAR CIRCUMSTANCES AND INCOME TAX SITUATION. PROSPECTIVE HOLDERS
SHOULD CONSULT THEIR OWN TAX ADVISOR AS TO THE SPECIFIC TAX CONSEQUENCES TO THEM
OF THE PURCHASE, OWNERSHIP AND DISPOSITION OF NOTES, INCLUDING THE APPLICATION
AND EFFECT OF STATE, LOCAL, FOREIGN AND OTHER TAX LAWS AND THE POSSIBLE EFFECTS
OF CHANGES IN UNITED STATES OR OTHER TAX LAWS.
 
                                       118
<PAGE>   120
 
                              PLAN OF DISTRIBUTION
 
     Based on interpretations by the staff of the Commission set forth in
no-action letters issued to third parties, the Company believes that the
Exchange Notes issued pursuant to the Exchange Offer in exchange for Private
Notes may be offered for resale, resold and otherwise transferred by any Holder
thereof (other than any such Holder which is an "affiliate" of the Company
within the meaning of Rule 405 under the Securities Act), without compliance
with the registration and prospectus delivery provisions of the Securities Act,
provided that such Exchange Notes are acquired in the ordinary course of such
Holder's business and such Holder has no arrangement with any person to
participate in the distribution of such Exchange Notes. Accordingly, any Holder
using the Exchange Offer to participate in a distribution of the Exchange Notes
will not be able to rely on such no-action letters. Notwithstanding the
foregoing, each broker-dealer that receives Exchange Notes for its own account
pursuant to the Exchange Offer must acknowledge that it will deliver a
prospectus in connection with any resale of such Exchange Notes. This
Prospectus, as it may be amended or supplemented from time to time, may be used
by a broker-dealer in connection with any resale of Exchange Notes received in
exchange for Private Notes where such Private Notes were acquired as a result of
market-making activities or other trading activities. The Company has agreed
that for a period of 120 days from the Expiration Date, it will make this
Prospectus, as amended or supplemented, available to any broker-dealer for use
in connection with any such resale.
 
     The Company will not receive any proceeds from any sale of Exchange Notes
by broker-dealers. Exchange Notes received by broker-dealers for their own
account pursuant to the Exchange Offer may be sold from time to time in one or
more transactions in the over-the-counter market, in negotiated transactions,
through the writing of options on the Exchange Notes or a combination of such
methods of resale, at market prices prevailing at the time of resale, at prices
related to such prevailing market prices or negotiated prices. Any such resale
may be made directly to purchasers or to or through brokers or dealers who may
receive compensation in the form of commissions or concessions from any such
broker-dealer and/or the purchasers of any such Exchange Notes. Any
broker-dealer that resells Exchange Notes that were received by it for its own
account pursuant to the Exchange Offer and any broker or dealer that
participates in a distribution of such Exchange Notes may be deemed to be an
"underwriter" within the meaning of the Securities Act and any profit on any
such resale of Exchange Notes and any commissions or concessions received by any
such persons may be deemed to be underwriting compensation under the Securities
Act. The Letter of Transmittal states that by acknowledging that it will
deliver, and by delivering, a prospectus as required, a broker-dealer will not
be deemed to admit that it is an "underwriter" within the meaning of the
Securities Act.
 
     For a period of 120 days from the Expiration Date, the Company will send a
reasonable number of additional copies of this Prospectus and any amendment or
supplement to this Prospectus to any broker-dealer that requests such documents
in the Letter of Transmittal. The Company will pay all the expenses incident to
the Exchange Offer (which shall not include the expenses of any Holder in
connection with resales of the Exchange Notes). The Company has agreed to
indemnify the Initial Purchasers and any broker-dealers participating in the
Exchange Offer against certain liabilities, including liabilities under the
Securities Act.
 
                                 LEGAL MATTERS
 
     The validity of the Exchange Notes will be passed upon for the Company by
Bryan Cave LLP, St. Louis, Missouri.
 
                                    EXPERTS
 
     The consolidated financial statements of the Company as of June 30, 1996
and 1997 and for each of the three years in the period ended June 30, 1997
included in this Prospectus have been audited by Deloitte & Touche LLP,
independent auditors, as stated in their report appearing herein, and are
included in reliance upon the report of such firm given upon their authority as
experts in accounting and auditing.
 
                                       119
<PAGE>   121
 
                   INDEX TO CONSOLIDATED FINANCIAL STATEMENTS
                       DTI HOLDINGS, INC. AND SUBSIDIARY
 
   
<TABLE>
<CAPTION>
                                                                PAGE
                                                                ----
<S>                                                             <C>
Independent Auditors' Report................................     F-2
Consolidated Balance Sheets as of June 30, 1996 and 1997....     F-3
Consolidated Statements of Operations for the years ended
  June 30, 1995, 1996 and 1997..............................     F-4
Consolidated Statements of Stockholders' Deficit for the
  years ended
  June 30, 1995, 1996 and 1997..............................     F-5
Consolidated Statements of Cash Flows for the years ended
  June 30, 1995, 1996 and 1997..............................     F-6
Notes to Consolidated Financial Statements..................     F-7
Consolidated Balance Sheet as of March 31, 1998
  (unaudited)...............................................    F-17
Consolidated Statements of Operations for the nine months
  ended March 31, 1997 and 1998 (unaudited).................    F-18
Consolidated Statements of Cash Flows for the nine months
  ended March 31, 1997 and 1998 (unaudited).................    F-19
Notes to Unaudited Consolidated Financial Statements........    F-20
</TABLE>
    
 
                                       F-1
<PAGE>   122
 
                          INDEPENDENT AUDITORS' REPORT
 
To the Board of Directors and Stockholders of DTI Holdings, Inc.:
 
     We have audited the accompanying consolidated balance sheets of DTI
Holdings, Inc., and subsidiary (the "Company") as of June 30, 1996 and 1997 and
the related consolidated statements of operations, stockholders' deficit, and
cash flows for each of the three years in the period ended June 30, 1997. These
financial statements are the responsibility of the Company's management. Our
responsibility is to express an opinion on these financial statements based on
our audits.
 
     We conducted our audits in accordance with generally accepted auditing
standards. Those standards require that we plan and perform the audit to obtain
reasonable assurance about whether the financial statements are free of material
misstatement. An audit includes examining, on a test basis, evidence supporting
the amounts and disclosures in the financial statements. An audit also includes
assessing the accounting principles used and significant estimates made by
management, as well as evaluating the overall financial statement presentation.
We believe that our audits provide a reasonable basis for our opinion.
 
     In our opinion, such consolidated financial statements present fairly, in
all material respects, the financial position of the Company as of June 30, 1996
and 1997 and the results of its operations and its cash flows for each of the
three years in the period ended June 30, 1997 in conformity with generally
accepted accounting principles.
 
Deloitte & Touche LLP
   
St. Louis, Missouri
    
 
September 10, 1997
   
  (July 13, 1998
    
  as to Notes 13 and 14)
 
                                       F-2
<PAGE>   123
 
                       DTI HOLDINGS, INC. AND SUBSIDIARY
 
                          CONSOLIDATED BALANCE SHEETS
                             JUNE 30, 1996 AND 1997
 
<TABLE>
<CAPTION>
                                                                 1996          1997
                                                                 ----          ----
<S>                                                           <C>           <C>
ASSETS
Current assets:
  Cash and cash equivalents.................................  $   817,391   $ 4,366,906
  Restricted cash (Note 4)..................................      459,522            --
  Accounts receivable, less allowance for doubtful accounts
     of $-0- and $48,000....................................       77,990       159,268
  Prepayment of suppliers...................................      554,261            --
  Prepaid and other current assets..........................       25,725        23,764
                                                              -----------   -----------
       Total current assets.................................    1,934,889     4,549,938
Network and equipment, at cost less accumulated depreciation
  of $479,467 and $1,235,640 (Note 3).......................   13,064,169    34,000,634
Deferred tax asset..........................................           --     1,214,331
Other assets................................................       26,700        84,233
                                                              -----------   -----------
       Total................................................  $15,025,758   $39,849,136
                                                              ===========   ===========
LIABILITIES AND STOCKHOLDERS' DEFICIT
Current liabilities:
  Accounts payable..........................................  $ 1,658,836   $ 5,086,830
  Notes payable (Note 4)....................................    6,500,000            --
  Deferred revenues -- current portion (Note 7).............      138,780       259,680
  Interest payable (Note 4).................................      118,796            --
  Taxes payable (other than income taxes)...................           --       923,104
                                                              -----------   -----------
       Total current liabilities............................    8,416,412     6,269,614
Deferred revenues (Note 7)..................................    6,595,948     9,420,224
                                                              -----------   -----------
       Total liabilities....................................   15,012,360    15,689,838
Commitments and contingencies (Notes 10, 11, 12 and 13)
Redeemable Convertible Series A Preferred Stock -- $0.01 par
  value, 30,000 shares authorized, 0 and 18,500 shares
  issued and outstanding (Notes 5, 8, 13 and 14)............           --    28,889,165
Common stock warrants (Note 4)..............................    1,114,101            --
Stockholders' deficit:
  Preferred stock, $0.01 par value, 20,000,000 shares
     authorized, no shares issued and outstanding (Note 5
     and 14)................................................           --            --
  Common stock, $0.01 par value, 50,000,000 and 100,000,000
     shares authorized, 30,000,000 shares issued and
     outstanding (Notes 6, 13 and 14).......................      300,000       300,000
  Common stock warrants (Note 6)............................                    450,000
  Accumulated deficit.......................................   (1,400,703)   (5,479,867)
                                                              -----------   -----------
       Total stockholders' deficit..........................   (1,100,703)   (4,729,867)
                                                              -----------   -----------
Total.......................................................  $15,025,758   $39,849,136
                                                              ===========   ===========
</TABLE>
 
                See notes to consolidated financial statements.
 
                                       F-3
<PAGE>   124
 
                       DTI HOLDINGS, INC. AND SUBSIDIARY
 
                     CONSOLIDATED STATEMENTS OF OPERATIONS
                    YEARS ENDED JUNE 30, 1995, 1996 AND 1997
 
<TABLE>
<CAPTION>
                                                               1995          1996          1997
                                                               ----          ----          ----
<S>                                                          <C>          <C>           <C>
REVENUES:
Telecommunications services
  Carrier's carrier services.............................           --    $  188,424    $   807,347
  End-user services......................................    $ 199,537       488,377        515,637
                                                             ---------    ----------    -----------
                                                               199,537       676,801      1,322,984
Other services...........................................           --            --        711,006
                                                             ---------    ----------    -----------
     Total revenues......................................      199,537       676,801      2,033,990
                                                             ---------    ----------    -----------
OPERATING EXPENSES:
  Telecommunications services............................      165,723       296,912        847,190
  Other services.........................................           --            --        364,495
  Selling, general and administrative....................      240,530       548,613      1,118,809
  Depreciation and amortization..........................       70,500       425,841        757,173
                                                             ---------    ----------    -----------
     Total operating expenses............................      476,753     1,271,366      3,087,667
                                                             ---------    ----------    -----------
     Loss from operations................................     (277,216)     (594,565)    (1,053,677)
OTHER INCOME (EXPENSES):
  Interest income........................................      153,261       193,049        101,914
  Interest expense.......................................     (162,777)     (384,859)      (152,937)
  Loan commitment fees (Note 6)..........................           --            --       (784,500)
  Equity in earnings of joint venture (Note 8)...........           --            --         37,436
                                                             ---------    ----------    -----------
     Loss before income tax benefit......................     (286,732)     (786,375)    (1,851,764)
                                                             ---------    ----------    -----------
INCOME TAX BENEFIT (Note 9)..............................           --            --      1,214,331
                                                             ---------    ----------    -----------
NET LOSS.................................................    $(286,732)   $ (786,375)   $  (637,433)
                                                             =========    ==========    ===========
</TABLE>
 
                See notes to consolidated financial statements.
 
                                       F-4
<PAGE>   125
 
                       DTI HOLDINGS, INC. AND SUBSIDIARY
 
                           CONSOLIDATED STATEMENTS OF
                             STOCKHOLDERS' DEFICIT
                    YEARS ENDED JUNE 30, 1995, 1996 AND 1997
 
<TABLE>
<CAPTION>
                                                                                   RETAINED          TOTAL
                                                       ADDITIONAL     COMMON      EARNINGS/      STOCKHOLDERS'
                              PREFERRED     COMMON      PAID-IN       STOCK      (ACCUMULATED       EQUITY
                                STOCK       STOCK       CAPITAL      WARRANTS      DEFICIT)        (DEFICIT)
                              ---------     ------     ----------    --------    ------------    -------------
<S>                           <C>          <C>         <C>           <C>         <C>             <C>
BALANCE, JULY 1, 1994.......  $     --     $     --     $     --     $     --    $    19,094      $    19,094
  Capital contribution (Note
     6).....................        --           --       30,000           --                          30,000
  Net loss for the year.....        --           --           --           --       (286,732)        (286,732)
                              --------     --------     --------     --------    -----------      -----------
BALANCE, JUNE 30, 1995......        --           --       30,000           --       (267,638)        (237,638)
  Issuance of common stock
     (Notes 6 and 13).......        --      300,000      (30,000)          --       (269,970)              30
  Accretion to put value of
     common stock warrants
     (Note 4)...............        --           --           --           --        (76,720)         (76,720)
  Net loss for the year.....        --           --           --           --       (786,375)        (786,375)
                              --------     --------     --------     --------    -----------      -----------
BALANCE, JUNE 30, 1996......        --      300,000           --           --     (1,400,703)      (1,100,703)
  Accretion/repurchase of
     common stock warrants
     (Note 4)...............        --           --           --           --     (1,585,899)      (1,585,899)
  Accretion of redeemable
     convertible preferred
     stock to redemption
     price (Note 5, 13 and
     14)....................        --           --           --           --     (1,855,832)      (1,855,832)
  Common stock warrants
     (Note 6)...............        --           --           --      450,000             --          450,000
  Net loss for the year.....        --           --           --           --       (637,433)        (637,433)
                              --------     --------     --------     --------    -----------      -----------
BALANCE, JUNE 30, 1997......  $     --     $300,000     $     --     $450,000    $(5,479,867)     $(4,729,867)
                              ========     ========     ========     ========    ===========      ===========
</TABLE>
 
                See notes to consolidated financial statements.
 
                                       F-5
<PAGE>   126
 
                       DTI HOLDINGS, INC. AND SUBSIDIARY
 
                     CONSOLIDATED STATEMENTS OF CASH FLOWS
                    YEARS ENDED JUNE 30, 1995, 1996 AND 1997
 
<TABLE>
<CAPTION>
                                                          1995          1996           1997
                                                          ----          ----           ----
<S>                                                   <C>            <C>           <C>
Cash flows from operating activities:
  Net loss..........................................  $   (286,732)  $  (786,375)  $   (637,433)
  Adjustments to reconcile net loss to cash provided
     by operating activities
       Depreciation and amortization................        70,500       425,841        757,173
       Deferred income taxes........................            --            --     (1,214,331)
       Loan commitment fees related to common stock
          warrants..................................            --            --        450,000
       Changes in assets and liabilities:
          Accounts receivable.......................       (17,250)      (60,740)       (81,278)
          Prepayments to suppliers..................                    (554,261)       554,261
          Other assets..............................       (46,019)      (15,980)       (56,572)
          Accounts payable..........................     2,174,887      (516,051)     3,427,994
          Other liabilities.........................        18,285       100,511      1,529,282
          Deferred revenues.........................     4,990,213     1,706,765      2,945,176
                                                      ------------   -----------   ------------
Net cash flows provided by operating activities.....     6,903,884       299,710      7,674,272
                                                      ------------   -----------   ------------
Cash flows from investing activities:
  Increase in network and equipment.................    (6,804,176)   (5,663,047)   (19,876,595)
  Change in restricted cash.........................    (5,000,000)    4,540,478        459,522
                                                      ------------   -----------   ------------
     Net cash used in investing activities..........   (11,804,176)   (1,122,569)   (19,417,073)
                                                      ------------   -----------   ------------
Cash flows from financing activities:
  Proceeds from issuance of redeemable convertible
     preferred stock; including cash from
     contributed joint venture of $2,253,045........            --            --     10,492,316
  Proceeds from borrowings under notes payable......     5,000,000    10,403,305      8,000,000
  Principal payments on notes payable...............            --    (8,903,305)      (500,000)
  Repurchase of common stock warrants granted to a
     customer.......................................            --            --     (2,700,000)
  Proceeds from issuance of common stock............            --            30             --
  Capital contribution..............................        30,000            --             --
                                                      ------------   -----------   ------------
     Net cash provided by financing activities......     5,030,000     1,500,030     15,292,316
                                                      ------------   -----------   ------------
Net increase in cash and cash equivalents...........       129,708       677,171      3,549,515
Cash and cash equivalents, beginning of period......        10,512       140,220        817,391
                                                      ------------   -----------   ------------
Cash and cash equivalents, end of period............  $    140,220   $   817,391   $  4,366,906
                                                      ============   ===========   ============
Supplemental cash flow disclosures:
  Cash paid for interest, net of amounts
     capitalized....................................  $    135,076   $   474,017   $    271,732
                                                      ============   ===========   ============
Supplemental disclosure of significant non-cash
  activities
  Consideration for issuance of redeemable
     convertible preferred stock (Notes 5 and 8):
     Outstanding principal of KLT Loan..............  $         --   $        --   $ 14,000,000
     Accrued interest payable on KLT Loan...........            --            --        794,062
     Assets of contributed joint venture............            --            --      1,816,043
     Liabilities assumed of contributed joint
       venture......................................            --            --         69,088
</TABLE>
 
                See notes to consolidated financial statements.
 
                                       F-6
<PAGE>   127
 
                       DTI HOLDINGS, INC. AND SUBSIDIARY
 
                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
                    YEARS ENDED JUNE 30, 1995, 1996 AND 1997
 
1. DESCRIPTION OF BUSINESS
 
     DTI Holdings, Inc. (the "Company" or "DTI") was incorporated in December
1997 as part of the reorganization of Digital Teleport, Inc., a wholly-owned
subsidiary of DTI ("Digital Teleport"). See Note 14. Digital Teleport was
incorporated in June 1989, and was certified as a telecommunications company in
Missouri by the Missouri Public Service Commission in 1992. DTI commenced
construction of its long-haul network in fiscal year 1995, following an
agreement with the Missouri Highway and Transportation Commission ("MHTC"),
which granted to DTI the exclusive right to build in the interstate highway
systems in Missouri. DTI is a facilities-based provider of non-switched
interexchange and local network telecommunications services to interexchange
carriers ("IXCs"), and business and governmental end users in Missouri. DTI's
network is designed to include high-capacity (i) interexchange long-haul routes
between the larger metropolitan areas in the region, (ii) local networks in such
larger metropolitan areas, and (iii) local networks in secondary and tertiary
markets located along the long-haul routes.
 
   
     At June 30, 1997, activities were primarily located in the State of
Missouri providing interexchange end-user and carrier's carrier services.
Carrier's carrier services are provided through wholesale network capacity
agreements and IRU agreements. Wholesale network capacity agreements provide
carriers with virtual circuits or bandwidth capacity on DTI's network. The
carrier customer in a wholesale network capacity agreement does not have
exclusive use of any particular strand of fiber, but instead has the right to
transmit along a virtual circuit or a certain amount of bandwidth along DTI's
network. In an IRU agreement the Company grants indefeasable rights to use
specified strands of optical fiber (which are used exclusively by the carrier
customer), while the carrier customer is responsible for providing the
electronic equipment necessary to transmit communications along the fiber.
    
 
     Prior to July 1, 1996, the Company was considered to be a development stage
enterprise focusing on developing its digital optic telecommunications network
and customer base. All of the Company's operations are subject to extensive
federal and state regulation.
 
2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
 
   
     PRINCIPLES OF CONSOLIDATION -- The consolidated financial statements as of
and for the year ended June 30, 1997 include the accounts of DTI and its wholly
owned subsidiary, Digital Teleport. In addition, the financial statements
include an entity acquired during the year ended June 30, 1997. The Company
previously held a 50% interest in this entity which was accounted for under the
equity method. The acquisition of the remaining 50% interest was accounted for
as a purchase. Accordingly, the purchase consideration was allocated to the
assets and liabilities acquired based on their fair values as of the date of
acquisition. All significant intercompany transactions and balances have been
eliminated.
    
 
     CONCENTRATIONS OF RISK -- The Company currently operates in the
telecommunications industry within the State of Missouri. See Note 7 regarding
concentration of credit risk associated with deferred revenues and revenues.
Additionally, the Company is dependent upon single or limited source suppliers
for its source of fiber optic cable for a number of components and parts used in
its network.
 
     MANAGEMENT ESTIMATES -- The preparation of financial statements in
conformity with generally accepted accounting principles requires that
management make certain estimates and assumptions that affect the reported
amounts of assets and liabilities and disclosure of contingent assets and
liabilities at the date of the financial statements. The reported amounts of
revenues and expenses during the reporting period may also be affected by the
estimates and assumptions management is required to make. Actual results may
differ from those estimates.
 
   
     REVENUES -- The Company recognizes revenue on telecommunication services in
the month such services are provided. Payments received in advance of services
under wholesale network capacity agreements are
    
                                       F-7
<PAGE>   128
                       DTI HOLDINGS, INC. AND SUBSIDIARY
 
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)
 
   
recorded as deferred revenue and recognized over the life of the service
contract as services are provided. Payments received in advance pursuant to IRU
agreements are recorded as deferred revenue and recognized over the terms of the
related agreements beginning upon completion of specific route segments. See
also Note 7. Other services revenue consists of work related to the design and
installation of innerduct for customers who are constructing fiber optic cable
facilities and is recognized under the completed contract method of accounting.
    
 
     CASH AND CASH EQUIVALENTS -- The Company considers all highly liquid
investments with original maturities of three months or less to be cash
equivalents.
 
     NETWORK AND EQUIPMENT -- Network and equipment are stated at cost. Costs of
construction are capitalized, including interest costs on funds borrowed to
finance the construction. Maintenance and repairs are charged to operations as
incurred. Depreciation is provided using the straight-line method over the
estimated useful lives of the assets as follows:
 
<TABLE>
<S>                                                             <C>
Fiber optical cable plant...................................    25 years
Fiber optic network buildings...............................    15 years
Leasehold improvements......................................    15 years
Fiber optic terminal equipment..............................     8 years
Furniture, office equipment and other.......................     5 years
</TABLE>
 
     The carrying value of long-lived assets is periodically evaluated by
management for impairment. Upon indication of an impairment, the Company will
record a loss on its long-lived assets if the discounted cash flows estimated to
be generated by those assets are less than the related carrying amount of the
assets.
 
   
     NEW ACCOUNTING STANDARDS -- In 1997, the Financial Accounting Standards
Board issued Statement of Financial Accounting Standards (SFAS) No. 130,
"Reporting Comprehensive Income," and SFAS No. 131, "Disclosures About Segments
of an Enterprise and Related Information." These statements, which are effective
for fiscal years beginning after December 15, 1997, expand or modify disclosures
and, the Company believes, will have no impact on the Company's consolidated
financial position, results of operations or cash flows.
    
 
   
     INCOME TAXES -- The Company accounts for income taxes utilizing the
asset/liability method, and deferred taxes are determined based on the estimated
future tax effects of differences between the financial statement and tax bases
of assets and liabilities given the provisions of the enacted tax laws.
    
 
3. NETWORK AND EQUIPMENT
 
     Network and equipment consists of the following as of June 30:
 
<TABLE>
<CAPTION>
                                                         1996          1997
                                                         ----          ----
<S>                                                   <C>           <C>
Fiber optic cable plant.............................  $11,058,172   $28,498,465
Fiber optic terminal equipment......................    2,115,177     5,757,270
Fiber optic network buildings.......................      289,557       757,680
Leasehold improvements..............................        5,651       131,611
Furniture, office equipment and other...............       75,079        91,248
                                                      -----------   -----------
                                                       13,543,636    35,236,274
Less -- accumulated depreciation....................      479,467     1,235,640
                                                      -----------   -----------
                                                      $13,064,169   $34,000,634
                                                      ===========   ===========
</TABLE>
 
     At June 30, 1996 and 1997, fiber optic cable plant, fiber optic terminal
equipment and fiber optic network buildings include $6,421,234 and $19,027,585
of construction in progress, respectively, that was not in service
 
                                       F-8
<PAGE>   129
                       DTI HOLDINGS, INC. AND SUBSIDIARY
 
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)
 
and, accordingly, has not been depreciated. Also, during the years ended June
30, 1995, 1996 and 1997 $9,516, $1,227,149 and $562,750 of interest costs were
capitalized.
 
4. BORROWING ARRANGEMENTS
 
   
     Effective April 30, 1996, and as subsequently amended, the Company entered
into a loan agreement with KLT Telecom Inc. ("KLT"), a wholly-owned subsidiary
of Kansas City Power and Light Company ("KCPL"), to provide borrowings for the
expansion of the Company's network not to exceed $14,000,000 bearing interest at
3% above the prime interest rate (the "KLT Loan"). At June 30, 1996, a total of
$6,000,000 had been borrowed under this facility. During 1997, an additional
$8,000,000 was borrowed, bringing the total amount of the KLT Loan to
$14,000,000. The outstanding principal of the KLT Loan, plus accrued interest,
was contributed as consideration under the Stock Purchase Agreement referred to
in Note 5.
    
 
   
     In connection with the issuance of a $3,200,000 note payable to a major
customer effective February 20, 1996, approximately $1,037,000 of the proceeds
was allocated to a warrant which was also granted to the customer. The warrant
represented the right to purchase 5% of the common stock of the Company for a
nominal amount. The Company also received an amendment to the contract with the
major customer to provide an additional $1,200,000 in telecommunication services
and modify certain completion dates in the original contract. The note was paid
in full in April 1996. The carrying amount of the warrants was being accreted
from the date of issuance until February 1997, the initial date at which the
Company could have been required to repurchase the warrants for $1,250,000. In
February 1998, the Company, repurchased the warrant from the holder for the
amount of $2,700,000 which was stipulated in a repurchase right included in the
customer contract and available to the Company for the period from note issuance
through February 19, 1997.
    
 
   
     During 1995, the Company entered into a Commercial Loan Revolving
Promissory Note Agreement (the "Agreement") with a lender to provide financing
for the acquisition and construction of fiber optic network, the purchase of
equipment related to the construction and operation of the network, and working
capital. At June 30, 1996, the Company had borrowings of $500,000 under the
Agreement which accrued interest at the lender's prime rate. The note was paid
in full in May 1997. Borrowings under this Agreement were collateralized by cash
equivalents that were maintained at the lender ("restricted cash") in the amount
of such borrowings and that earned interest at the lender's money market rate.
    
 
5. REDEEMABLE CONVERTIBLE SERIES A PREFERRED STOCK
 
     During 1997, the Company amended its Articles of Incorporation to provide
for 50,000 authorized shares of preferred stock, $0.01 par value. On December
31, 1996, the Company entered into a Stock Purchase Agreement (the "Stock
Purchase Agreement") with KLT to sell 30,000 shares of redeemable convertible
preferred stock (designated "Series A Preferred Stock") for $45,000,000. At the
closing date of the Stock Purchase Agreement on March 12, 1997, 15,100 shares of
Series A Preferred Stock were issued to KLT with the remaining 14,900 shares of
Series A Preferred Stock to be issued as additional capital as required by the
Company upon twenty days notice by DTI to KLT and verification by DTI as to the
use of the monies pursuant to the terms of the Stock Purchase Agreement. The
consideration for the 15,100 shares of Series A Preferred Stock was calculated
as follows:
 
<TABLE>
<S>                                                           <C>
Outstanding principal of KLT Loan...........................  $14,000,000
Accrued interest on the KLT Loan at March 11, 1997..........      794,062
KLT investment in KCDT LLC (Note 8).........................    4,000,000
Cash........................................................    3,855,938
                                                              -----------
     Total consideration for 15,100 shares of Series A
       preferred stock......................................   22,650,000
Less: transaction costs.....................................      716,667
                                                              -----------
     Net consideration for 15,100 shares of Series A
       preferred stock......................................  $21,933,333
                                                              ===========
</TABLE>
 
                                       F-9
<PAGE>   130
                       DTI HOLDINGS, INC. AND SUBSIDIARY
 
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)
 
   
     Series A Preferred Stock shareholders are entitled to one common vote for
each share of common stock that would be issuable upon conversion of the Series
A Preferred Stock. Each share of Series A Preferred Stock is convertible into
one-thousand shares (after giving effect to the stock splits discussed in Note
13 and the Reorganization discussed in Note 14) of common stock (the "Conversion
Shares") under the terms of the Stock Purchase Agreement and is entitled to the
number of votes equal to the number of Conversion Shares into which such share
of Series A Preferred Stock is convertible with respect to any and all matters
presented to the shareholders of the Company for their action or consideration.
The Series A Preferred Stock shares will automatically convert into common stock
upon the sale of shares of common stock or debt securities of the Company in a
"qualified public offering" within the meaning of the Company's Articles of
Incorporation and subject to the satisfaction of certain net proceed dollar
thresholds. See also note 13. Series A Preferred Stock shareholders rank senior
to common shareholders in the event of any voluntary or involuntary liquidation,
dissolution or winding up of the Company. Series A Preferred Stock shareholders
are entitled to receive such dividends as would be declared and paid on each
share of common stock. Each additional share of Series A Preferred Stock issued
will result in $150,000 of contributed capital.
    
 
     Additionally, under the terms of the Certificate of Designation
establishing and governing the Series A Preferred Stock there are two different
redemption features. The first feature provides that commencing July 1, 1999, if
the Company has not met certain financial ratios, the Series A Preferred Stock
shareholders will have the option to require the Company to redeem all of the
shares of Series A Preferred Stock outstanding at the redemption price which is
calculated as a 25% internal rate of return on all amounts paid for the Series A
Preferred Stock. Accordingly, the Series A Preferred Stock is being accreted to
its redemption price. The second feature provides that from and after April 1,
1999, the Company will have the option to require the Series A Preferred Stock
shareholders to sell to the Company all of the shares of Series A Preferred
Stock outstanding at the redemption price as calculated above.
 
     On June 27, 1997, an additional 3,400 shares of Series A Preferred Stock
were issued for a cash payment of $5,100,000. At June 30, 1997, Series A
Preferred Stock issued and outstanding was as follows:
 
<TABLE>
<S>                                                           <C>
Series A Preferred Stock, $0.01 par value, 30,000 shares
  designated, 18,500 shares issued and outstanding..........  $       185
Additional paid-in capital..................................   27,033,148
Accumulated accretion to redemption price...................    1,855,832
                                                              -----------
     Total carrying value...................................  $28,889,165
                                                              ===========
</TABLE>
 
     In conjunction with the Stock Purchase Agreement, the Company entered into
a Shareholders' Agreement whereby the Series A Preferred Stock shareholders will
designate two of the four directors of the Company's Board of Directors.
 
     See also Notes 13 and 14.
 
6. EQUITY TRANSACTIONS
 
   
     As of June 30, 1995, the Company had authorized 30,000,000 shares of common
stock, par value $1.00 per share, and obtained contributed capital of $30,000.
In April 1996, the Company authorized 20,000,000 additional shares of common
stock, and changed the par value of the common stock to $.01 par value per
share. At such time the Company made its initial share issuance of 30,000,000
shares of common stock as "founder's shares" to the founder, President and Chief
Executive Officer of the Company. These shares were attributable to the initial
contributed services of the founder and his capital contribution of $30,000 in
1995. In February 1997, the Company authorized 50,000,000 additional shares of
common stock.
    
 
   
     In connection with a loan commitment from a strategic third party lender
which became effective December 24, 1996, the Company agreed to issue a warrant
representing the right to purchase 1% of the common stock of the Company for
$0.01 per share. Effective December 31, 1996, the Company reached an agreement
with respect to the sale of its Series A Preferred Stock (see Note 5), and, as a
result, the
    
 
                                      F-10
<PAGE>   131
                       DTI HOLDINGS, INC. AND SUBSIDIARY
 
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)
 
   
commitment from the strategic third party lender was terminated in January 1997.
Although the warrant had not been issued as of June 30, 1997, the consolidated
financial statements reflect the terms as determined by the Company.
Accordingly, the Company has recorded the fair value of this warrant as an
equity instrument and the related loan commitment fee as an expense. The fair
value of the warrant was determined based upon an independent valuation
utilizing the Black-Scholes method. The warrant is exercisable at the option of
the holder and expires in the year 2007. Also in connection with this
transaction, cash expenses consisting of legal and other fees of $334,500 were
incurred by the Company.
    
 
     See also Note 13.
 
7. CUSTOMER CONTRACTS
 
     The Company enters into telecommunication services and fiber usage
agreements with unrelated third parties whereby the Company will provide either
telecommunication services or indefeasible rights to use (IRUs) in multiple
fibers along certain routes for a minimum purchase price paid up front or over
the life of the contract. These amounts are then recognized over the terms of
the related agreements which range from 10 to 40 years on a straight line basis.
The Company has various contracts related to telecommunications services and
fiber usage comprising the following at June 30:
 
<TABLE>
<CAPTION>
                                                                   1996           1997
                                                                   ----           ----
<S>                                                             <C>            <C>
Total contract amounts......................................    $16,445,250    $35,563,380
Less: future payments due under contracts...................      9,600,000     25,465,205
                                                                -----------    -----------
Total amounts collected.....................................      6,845,250     10,098,175
Less: total amounts recognized as revenues..................        110,522        418,271
                                                                -----------    -----------
Deferred revenue............................................      6,734,728      9,679,904
Less: current maturities....................................        138,780        259,680
                                                                -----------    -----------
                                                                $ 6,595,948    $ 9,420,224
                                                                ===========    ===========
</TABLE>
 
     The Company has substantial business relationships with several large
customers. Four customers accounted for 59%, 21%, 17% and 2% of deferred
revenues at June 30, 1997. Additionally, these four customers accounted for 21%,
10%, 13% and 56%, respectively, of amounts to be received per the customer
contracts.
 
     During fiscal year 1997, the Company's three largest customers accounted
for 18%, 18% and 16% of telecommunications services revenue. During fiscal year
1996, the Company's three largest customers accounted for 47%, 21% and 10% of
telecommunications services revenue. During fiscal year 1995, one customer
accounted for 99% of end-user services revenue. The Company's contracts provide
for reduced payments and varying penalties for late delivery of route segments,
and allow the customers, after expiration of grace periods, to delete such
non-delivered segment from the system route to be delivered. A significant
reduction in the level of services the Company provides for any of these
customers could have a material adverse effect on the Company's results of
operations or financial condition. In addition, the Company's business plan
assumes increased revenue from its carrier's carrier services operations to fund
the expansion of the DTI network. Many of the Company's customer arrangements
are subject to termination and do not provide the Company with guarantees that
service quantities will be maintained at current levels. The Company is aware
that certain interexchange carriers are constructing or considering new
networks. Accordingly, there can be no assurance that any of the Company's
carrier's carrier services customers will increase their use of the Company's
services, or will not reduce or cease their use of the Company's services,
either of which could have a material adverse effect on the Company's ability to
fund the expansion of the DTI network.
 
                                      F-11
<PAGE>   132
                       DTI HOLDINGS, INC. AND SUBSIDIARY
 
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)
 
8. INVESTMENT IN JOINT VENTURE
 
     Effective July 1996, the Company entered into an agreement with KLT to form
KCDT LLC ("KCDT") as a limited liability company for the purpose of financing,
establishing, constructing and maintaining a fiber-optic network communications
system ("System") within the Kansas City, Missouri metropolitan area. The
Company received a 50% interest in KCDT for its contribution of an indefeasible
right to use (IRU) the signal transmission capacity of certain optic fiber
strands within the System. KLT received a 50% interest in KCDT for its
contribution of access rights of utility right-of-ways in Kansas City and a
capital contribution not to exceed $5,000,000 in cash, as needed, for the
construction of the System or operations of KCDT.
 
   
     As part of the Stock Purchase Agreement, which closed March 12, 1997 (Note
5), KLT contributed to the Company its ownership interest in KCDT which amounted
to $4,000,000. Assets and liabilities of the joint venture at the date of
contribution consisted of $2,253,045 in cash, $1,816,043 in network and
equipment and $69,088 in other liabilities, all of which assets and liabilities
were determined to approximate fair market value. This transaction was accounted
for as a purchase by the Company. Additionally, as of March 12, 1997, KCDT had
no operations in service. The only income earned by KCDT consisted of interest
income earned on bank deposits.
    
 
     Prior to receipt of KLT's interest in KCDT, the Company accounted for its
investment in KCDT using the equity method. Equity in earnings of joint venture
represents the Company's 50% interest in the operations of KCDT under the equity
method. Upon receipt of KLT's interest in KCDT, operations of KCDT have been
consolidated with the Company's operations.
 
9. INCOME TAXES
 
     The actual income tax expense for the years ended June 30, 1997, 1996 and
1995 differs from the "expected" income tax expense, computed by applying the
U.S. Federal corporate tax rate of 35% to income before income taxes as follows:
 
<TABLE>
<CAPTION>
                                                               1995        1996         1997
                                                               ----        ----         ----
<S>                                                         <C>          <C>         <C>
Computed "expected" income tax benefit....................  $  100,356   $ 275,231   $  648,117
Change in valuation allowance.............................    (103,368)   (321,596)     424,964
Other -- net..............................................       3,012      46,365      141,250
                                                            ----------   ---------   ----------
     Income tax benefit...................................  $       --   $      --   $1,214,331
                                                            ==========   =========   ==========
</TABLE>
 
     Temporary differences which give rise to long-term deferred taxes as
reported on the balance sheet are as follows at June 30:
 
<TABLE>
<CAPTION>
                                                                 1996         1997
                                                                 ----         ----
<S>                                                           <C>          <C>
Deferred tax assets:
  Deferred revenues.........................................  $  346,672   $  571,711
  Net operating loss carryforward...........................     326,139    1,175,712
                                                              ----------   ----------
     Total deferred tax assets..............................     672,811    1,747,423
Deferred tax liabilities -- accelerated depreciation........    (247,847)    (533,092)
Valuation allowance.........................................    (424,964)
                                                              ----------   ----------
     Net deferred tax assets................................  $       --   $1,214,331
                                                              ==========   ==========
</TABLE>
 
     Even though the Company has incurred tax losses, management believes that
it is more likely than not that it will generate taxable income sufficient to
realize the tax benefit associated with future deductible temporary differences
and net operating loss carryforwards prior to their expiration. This belief is
based
 
                                      F-12
<PAGE>   133
                       DTI HOLDINGS, INC. AND SUBSIDIARY
 
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)
 
primarily upon changes in operations over the last year. As a result, the
Company reversed into income its valuation allowance of $424,964 which was
recorded at June 30, 1996. Tax net operating losses of approximately $3 million
expire in years 2010-2012 if not utilized in future income tax returns. The
availability of the loss carryforwards may be limited in the event of a
significant change in the ownership of the Company or its subsidiary.
 
10. OPERATING LEASES
 
     The Company has operating leases for equipment and for office space. The
Company's headquarters is leased from the Company's President and Chief
Executive Officer in an amount of $75,000 per year for the term January 1, 1997
to December 31, 1997. Rent expense related to the headquarters for fiscal years
1995, 1996 and 1997 was $33,400, $15,405 and $49,897, respectively.
Additionally, equipment space is leased from various office buildings throughout
the Company's service areas. Minimum rental commitments under the above leases,
some of which contain renewal options and escalation clauses, are as follows:
 
<TABLE>
<S>                                                           <C>
Year ending June 30:
  1998......................................................  $51,629
  1999......................................................    6,436
  2000......................................................    1,629
                                                              -------
       Total................................................  $59,694
                                                              =======
</TABLE>
 
11. COMMITMENTS
 
   
     HIGHWAY AND UTILITY RIGHTS-OF-WAY -- In July 1994, the Company entered into
an agreement with MHTC to install and maintain a buried fiber optic network
within the cable corridor along the federal interstate highway system in
Missouri. Under the terms of this agreement, MHTC will receive certain dedicated
dark and lighted fiber optic strands in the statewide system and the necessary
connections thereto and the Company, in turn, receives exclusive easements
within certain of MHTC's airspace for a forty year period. Pursuant to this
contract DTI is obligated to complete by December 31, 1998 construction of 1,200
miles of fiber cable along the Missouri interstate and state highway system. DTI
anticipates meeting this obligation and completing substantially all of its
currently planned network in Missouri by such date. The Company must complete
construction on an additional 800 miles by the end of 1999 to maintain its
exclusive rights to such routes. Additionally, the Company was required to post
a $250,000 performance and payment bond under the terms of this Agreement. In
August 1994, the sole stockholder of the Company entered into a letter of credit
with a lender in the amount of $250,000, in connection with this Agreement. The
Company's May 1997 agreement with the Department of Transportation of the State
of Arkansas grants to DTI the right, without obligation, to install its network
along 250 miles of the interstate and state highway systems in Arkansas, as well
as the right to expand its network onto additional routes in the future. DTI has
submitted a proposal to the Department of Transportation of the State of Kansas
to enter into an agreement providing for rights-of-way throughout the highway
system in metropolitan Kansas City in exchange for fiber. DTI also has a license
from KCPL granting it the right to use conduits, poles, ducts, manholes and
rights-of-way owned by KCPL to construct the DTI network in the Kansas City
metropolitan area. The Company will seek to obtain the rights-of-way that it
needs for the expansion of its network in areas where it will construct network
rather than purchase or swap fiber optic strands by entering into agreements
with other state highway departments and other governmental authorities,
utilities or pipeline companies and it may enter into joint ventures or other
"in-kind" transfers in order to obtain such rights. In addition, DTI may use
available public rights-of-way.
    
 
   
     LICENSING AGREEMENTS -- The Company has entered into various licensing
agreements with municipalities throughout Missouri. Under the terms of these
agreements, the Company maintains certain performance bonds, totaling $350,000
in the aggregate, and minimum insurance levels. Such agreements generally have
    
 
                                      F-13
<PAGE>   134
                       DTI HOLDINGS, INC. AND SUBSIDIARY
 
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)
 
   
terms from 10 to 15 years and grant to the Company a non-exclusive license to
construct, operate, maintain and replace communications transmission lines for
its fiber optic cable system and other necessary appurtenances on public roads,
rights-of-way and easements within the municipality. In exchange for such
licenses, the Company generally provides to the municipality in-kind rights and
services (such as the right to use certain dedicated strands of optic fiber in
the DTI network within the municipality, interconnection services to the DTI
network within the municipality, and maintenance of the municipality's fibers),
or, less frequently, a nominal percentage of the gross revenues of the Company
for services provided within the municipality. In one instance, the Company is
obligated to make nominal annual cash payments for such rights based on linear
footage.
    
 
   
     EMPLOYMENT AGREEMENTS -- DTI has employment agreements entered into during
fiscal year 1997 with certain senior management personnel. These agreements are
effective for various periods through December 31, 1999, unless terminated
earlier by the executive or DTI, and provide for annual salaries, cost-of-living
adjustments, additional compensation in the form of bonuses based on performance
of the executive, and participation in the various benefit plans of DTI. The
agreements contain certain benefits to the executive if DTI terminates the
executive's employment without cause or if the executive terminates his
employment as a result of change in ownership of DTI. DTI's remaining aggregate
commitments for salaries under such agreements at June 30, 1997 is approximately
$819,000. See also Note 13 regarding the Company's Long-Term Incentive Award
Plan and additional employment agreements.
    
 
     SUPPLIER AGREEMENTS -- DTI's supplier agreements are with its major network
construction contractor and an equipment supplier.
 
     PURCHASE COMMITMENTS -- DTI's remaining aggregate purchase commitment for
construction and equipment at June 30, 1997 is approximately $7,220,000.
 
12. CONTINGENCIES
 
     On June 20, 1995, the Company and its President were named as defendants in
a suit which the plaintiff alleges that (i) the plaintiff entered into an oral
contract with the defendants pursuant to which the plaintiff was to receive a
percentage of the Company's common stock, (ii) the plaintiff provided services
to the Company for which the plaintiff was not and should be compensated, and
(iii) the defendants misrepresented certain facts to the plaintiff in order to
induce him to loan money and provide services to the defendants. Based on these
allegations, the plaintiff is suing for breach of contract and fraud and is
seeking actual monetary damages, punitive damages and a percentage of the common
stock of the Company. Management believes the plaintiff's claims are without
merit and intends to vigorously defend the claims. It is not possible to
determine what impact, if any, the outcome of this litigation might have on the
financial condition, results of operations or cash flows of the Company at this
time. The President has agreed personally to indemnify the Company against any
and all losses and damages resulting from any judgments and awards rendered
against the Company in this litigation. However, no guarantee can be made as to
the ability to satisfy all such amounts. The President has also agreed to
indemnify the holder of redeemable convertible preferred stock from such losses
and damages, and has pledged his stock ownership in the Company to secure such
obligation.
 
     The Company is involved in a dispute with a customer related to delays in
providing telecommunications services to the customer. In February 1998, the
Company received notice from a customer that it intends to setoff against
amounts payable to the Company approximately $400,000 as damages and penalties.
Management contends that the delays resulted from the customer's inability to
provide access and does not believe that ultimate settlement of this dispute
will have a material effect on the Company's financial position, results of
operations or cash flows.
 
                                      F-14
<PAGE>   135
                       DTI HOLDINGS, INC. AND SUBSIDIARY
 
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)
 
     From time to time the Company is named as a defendant in routine lawsuits
incidental to its business. The Company believes that none of such current
proceedings, individually or in the aggregate, will have a material adverse
effect on the Company's financial position, results of operations or cash flows.
 
13. SUBSEQUENT EVENTS
 
     During the six months ended December 31, 1997, an additional 11,500 shares
of Series A Preferred Stock were issued for cash payments of $17,250,000.
 
     On August 22, 1997 and on February 17, 1998, the Company approved stock
splits in the form of stock dividends of 99 shares and 999 shares, respectively,
of common stock for each one share of common stock outstanding. Effective
October 17, 1997 and February 18, 1998, the Company's Articles of Incorporation
were amended to increase the number of authorized shares of common stock to
100,000 and 100,000,000, respectively, and the stock dividends were issued to
the Company's stockholders. All share information included in the accompanying
financial statements has been retroactively adjusted to give effect to the stock
splits. In order to effect the 999 for 1 stock split on February 17, 1998,
$269,970 was charged to accumulated deficit. The Company will record an entry in
the third quarter of fiscal 1998 to reclassify this amount from accumulated
deficit to additional paid-in capital recorded in conjunction with the
reclassification of Series A Preferred Stock on February 13, 1998 as discussed
below.
 
   
     On August 22, 1997, the Company adopted a Long-Term Incentive Award Plan
(the "Plan"). A total of 3,000,000 shares of common stock of the Company have
been reserved for issuance under the Plan. As of July 13, 1998 the Company has
granted or is obligated to grant to certain employees and directors of the
Company options to purchase an aggregate of 725,000 shares of common stock under
the Plan. The employees' options vest 100% after five years from the date of
grant or, in the event the Company completes an initial public offering of its
common stock, 25% per year beginning one year from the date of grant. The
directors' options vest 25% per year beginning one year from the date of grant.
The exercise prices per share of such options range from $2.60 to $6.66 as
determined by the Board of Directors.
    
 
     On September 23, 1997, DTI's Board of Directors and stockholders approved
the merger of KCDT with and into the Company, which merger became effective on
October 17, 1997.
 
     In January 1998, Digital Teleport entered into a $30.0 million bank credit
facility (the "Credit Facility") with certain commercial lending institutions
and Toronto Dominion (Texas), Inc., as administrative agent for the lenders ("TD
(Texas)"), to fund its working capital requirements. Borrowings under the Credit
Facility bear interest at an adjustable rate based on (i) a base rate (either
the prime rate adopted by TD (Texas) or an adjusted Federal Funds rate) plus
1.75% or LIBOR plus 3.50% when the borrowing base ratio (total debt to property,
plant and equipment) is less than 30% and (ii) the base rate plus 1.20% or LIBOR
plus 3.00% when the borrowing base ratio is greater than 30%. At February 23,
1998, Digital Teleport had drawn $3.0 million principal amount under the Credit
Facility which was repaid with the net proceeds of the Senior Discount Notes due
2008 discussed below.
 
   
     On February 13, 1998, in connection the Company's offering of Senior
Discount Notes, the Company amended its Articles of Incorporation amending the
terms of the Series A Preferred Stock such that the Series A Preferred Stock is
no longer redeemable. The Series A Preferred Stock, as a result of such
amendment, will be classified with stockholders' equity subsequent to such date.
    
 
   
     On February 23, 1998, the Company completed the issuance and sale of
506,000 Units consisting of $506.0 million aggregate principal amount at
maturity of Senior Discount Notes due 2008 and warrants to purchase 3,926,560
shares of Common Stock, for which the Company received proceeds, net of
underwriting discounts and expenses, of approximately $264.8 million. Of the
$275.2 million gross proceeds from the issuance of the Units, $265.3 million
will be allocated to the initial accreted value of the Senior Discount
    
 
                                      F-15
<PAGE>   136
                       DTI HOLDINGS, INC. AND SUBSIDIARY
 
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)
 
   
Notes and $10.0 million will be allocated to warrants included in stockholders'
equity, based on the fair market value of the warrants as determined by the
Company and the initial purchasers of the Units. The Senior Discount Notes are
senior unsecured obligations of the Company and may be redeemed at the option of
the Company, in whole or in part, on or after March 1, 2003 at a premium
declining to zero in 2006. At any time and from time to time on or prior to
March 1, 2001, the Company may redeem an aggregate of up to 33 1/3% of the
aggregate principal amount at maturity of the originally issued Senior Discount
Notes within 60 days of one or more public equity offerings with the net
proceeds of such offering, at a redemption price of 112.5% of the accreted value
(determined at the redemption date). In the event of a "Change of Control" (as
defined in the Indenture pursuant to which the Senior Discount Notes were
issued), holders of the Senior Discount Notes may require the Company to offer
to repurchase all outstanding Senior Discount Notes at a price equal to 101% of
the accreted value thereof, plus accrued interest, if any, to the date of
redemption. The Senior Discount Notes also contain certain covenants that
restrict the ability of the Company and its Restricted Subsidiaries (as defined
in the Indenture) to incur certain indebtedness, pay dividends and make certain
other restricted payments, create liens, permit other restrictions on dividends
and other payments by Restricted Subsidiaries, issue and sell capital stock of
its Restricted Subsidiaries, guarantee certain indebtedness, sell assets, enter
into transactions with affiliates, merge, consolidate or transfer substantially
all of the assets of the Company and make any investments in any Unrestricted
Subsidiary (as defined in the Indenture). The issuance of the Senior Discount
Notes does not constitute a "qualified public offering" within the meaning of
the Company's Articles of Incorporation and, therefore, will not effect the
conversion of the Series A Preferred Stock into common stock.
    
 
   
     On April 14, 1998, the Company filed a Registration Statement on Form S-4
relating to an offer to exchange the Company's Series B Senior Discount Notes
due 2008 for its outstanding Senior Discount Notes (the "Exchange Offer"). The
Exchange Offer does not constitute a "qualified public offering" within the
meaning of the Company's Articles of Incorporation and, therefore, will not
effect the conversion of the Series A Preferred Stock into common stock.
    
 
14. REORGANIZATION
 
   
     On December 23, 1997, the Company completed a corporate reorganization (the
"Reorganization"), pursuant to which DTI was formed as the parent holding
company of Digital Teleport, Inc., which became a wholly-owned subsidiary of
DTI. Pursuant to the Reorganization, the outstanding shares of common and
preferred stock of Digital Teleport were exchanged for the number of shares of
common and preferred stock of DTI having the same relative rights and
preferences as such exchanged shares. The Reorganization was required in
connection with the establishment of the Credit Facility. The business
operations, name, charter, by-laws and board of directors of the Company are
identical in all material respects to those of Digital Teleport, which did not
change as a result of the Reorganization. Accordingly, the consolidated
financial statements have been presented as if Digital Teleport had always been
a wholly owned subsidiary of DTI. DTI is a holding company and, as such, has no
operations other than its ownership interest in Digital Teleport, its wholly
owned subsidiary, and maintains only nominal other assets ($100 in
organizational costs).
    
 
                                  * * * * * *
 
                                      F-16
<PAGE>   137
 
                       DTI HOLDINGS, INC. AND SUBSIDIARY
 
                           CONSOLIDATED BALANCE SHEET
   
                           MARCH 31, 1998 (UNAUDITED)
    
 
   
<TABLE>
<CAPTION>
                                                               MARCH 31,
                                                                  1998
                                                               ---------
<S>                                                           <C>
ASSETS
Current assets:
  Cash and cash equivalents.................................  $263,231,384
  Accounts receivable, less allowance for doubtful accounts
     of $167,000............................................       708,477
  Prepaid and other current assets..........................        34,769
                                                              ------------
       Total current assets.................................   263,974,628
Network and equipment, at cost less accumulated depreciation
  of $2,620,640 (Note 2)....................................    60,824,950
Deferred financing costs, net of amortization of $106,110...    10,390,287
Deferred tax asset..........................................     3,234,331
Other assets................................................        43,665
                                                              ------------
       Total................................................  $338,467,861
                                                              ============
LIABILITIES AND STOCKHOLDERS' EQUITY
Current liabilities:
  Accounts payable..........................................  $  4,555,642
  Deferred revenues -- current portion......................       366,000
  Taxes payable (other than income taxes)...................     2,115,358
                                                              ------------
       Total current liabilities............................     7,037,000
Deferred revenues...........................................    14,037,528
Senior discount notes, net (Note 7).........................   268,856,985
                                                              ------------
       Total liabilities....................................   289,931,513
Commitments and contingencies (Notes 5, 6 and 7)............            --
Stockholders' equity:
  Preferred stock, $.01 par value, 20,000,000 shares
     authorized, no shares issued and outstanding...........            --
  Convertible series A preferred stock, $.01 par value,
     30,000 shares authorized, 30,000 and -0- issued and
     outstanding............................................           300
  Common stock, $.01 par value, 100,000,000 shares
     authorized, 30,000,000 shares issued and outstanding
     (Notes 4 and 7)........................................       300,000
  Additional paid-in capital................................    44,013,063
  Common stock warrant......................................    10,421,336
  Accumulated deficit.......................................    (6,198,351)
                                                              ------------
       Total stockholders' equity...........................    48,536,348
                                                              ------------
Total.......................................................  $338,467,861
                                                              ============
</TABLE>
    
 
           See notes to unaudited consolidated financial statements.
 
                                      F-17
<PAGE>   138
 
                       DTI HOLDINGS, INC. AND SUBSIDIARY
 
                     CONSOLIDATED STATEMENTS OF OPERATIONS
   
             NINE MONTHS ENDED MARCH 31, 1997 AND 1998 (UNAUDITED)
    
 
   
<TABLE>
<CAPTION>
                                                                 1997          1998
                                                                 ----          ----
<S>                                                           <C>           <C>
TELECOMMUNICATIONS SERVICES REVENUES:
  Carrier's carrier services................................  $   488,931   $ 1,707,914
  End-user services.........................................      380,914       414,660
                                                              -----------   -----------
       Total revenues.......................................      869,845     2,122,574
                                                              -----------   -----------
OPERATING EXPENSES:
  Telecommunications services...............................      563,791     1,024,578
  Selling, general and administrative.......................      845,684     2,437,825
  Depreciation and amortization.............................      521,049     1,385,750
                                                              -----------   -----------
       Total operating expenses.............................    1,930,524     4,848,153
       Loss from operations.................................   (1,060,679)   (2,725,579)
OTHER INCOME (EXPENSES):
  Interest income...........................................       58,403     1,558,898
  Interest expense..........................................     (152,937)   (3,697,605)
  Loan commitment fees......................................     (784,500)           --
  Equity in earnings of joint venture.......................       37,436            --
                                                              -----------   -----------
       Loss before income tax benefit.......................   (1,902,277)   (4,864,286)
Income tax benefit..........................................    1,042,000     2,020,000
                                                              -----------   -----------
Net loss....................................................  $  (860,277)  $(2,844,286)
</TABLE>
    
 
           See notes to unaudited consolidated financial statements.
 
                                      F-18
<PAGE>   139
 
                       DTI HOLDINGS, INC. AND SUBSIDIARY
 
                     CONSOLIDATED STATEMENTS OF CASH FLOWS
   
             NINE MONTHS ENDED MARCH 31, 1997 AND 1998 (UNAUDITED)
    
 
   
<TABLE>
<CAPTION>
                                                                  1997           1998
                                                                  ----           ----
<S>                                                           <C>            <C>
CASH FLOWS FROM OPERATING ACTIVITIES:
  Net loss..................................................  $   (860,277)  $ (2,844,286)
  Adjustments to reconcile net loss to cash provided by
     operating activities:
     Depreciation and amortization..........................       521,049      1,491,860
     Accretion of discount on senior discount notes.........            --      3,604,801
     Deferred income taxes..................................    (1,042,000)    (2,020,000)
     Loan commitment fees related to common stock
       warrants.............................................       450,000             --
     Changes in assets and liabilities:
       Accounts receivable..................................    (1,491,397)      (549,209)
       Prepaid and other current assets.....................       543,300        (11,003)
       Other assets.........................................       (36,945)        40,568
       Accounts payable.....................................     1,872,548       (531,188)
       Other liabilities....................................       606,178
       Taxes payable (other than income taxes)..............       543,000      1,192,254
       Deferred revenues....................................     3,589,343      4,723,624
                                                              ------------   ------------
          Net cash flows provided by operating activities...     4,694,799      5,097,421
                                                              ------------   ------------
CASH FLOWS FROM INVESTING ACTIVITIES:
  Increase in network and equipment.........................   (10,518,316)   (28,210,066)
  Change in restricted cash.................................       459,522             --
                                                              ------------   ------------
          Net cash used in investing activities.............   (10,058,794)   (28,210,066)
                                                              ------------   ------------
CASH FLOWS FROM FINANCING ACTIVITIES:
  Proceeds from issuance of senior discount notes and
     attached warrants......................................            --    275,233,520
  Proceeds from issuance of redeemable convertible preferred
     stock including cash from contributed joint venture of
     $0 and $2,253,045......................................     5,464,313     17,250,000
  Repurchase of common stock warrants granted to a
     customer...............................................    (2,700,000)            --
  Deferred financing costs..................................            --    (10,496,397)
  Proceeds from notes payable...............................     8,000,000             --
  Payment of notes payable..................................      (450,000)            --
  Proceeds from credit facility.............................            --      3,000,000
  Principal payments on credit facility.....................            --     (3,000,000)
                                                              ------------   ------------
          Net cash provided by financing activities.........    10,314,313    281,977,123
                                                              ------------   ------------
Net increase in cash and cash equivalents...................     4,950,318    258,864,478
Cash and cash equivalents, beginning of period..............       817,391      4,366,906
                                                              ------------   ------------
Cash and cash equivalents, end of period....................  $  5,767,709   $263,231,384
                                                              ============   ============
Supplemental disclosure of significant non-cash activities:
  Consideration for issuance of redeemable convertible
     preferred stock:
     Outstanding principal of KLT Loan......................  $ 14,000,000   $         --
     Accrued interest payable on KLT Loan...................       794,062             --
     Assets of contributed joint venture....................     1,816,043             --
     Liabilities assumed of contributed joint venture.......        69,088             --
</TABLE>
    
 
           See notes to unaudited consolidated financial statements.
 
                                      F-19
<PAGE>   140
 
                       DTI HOLDINGS, INC. AND SUBSIDIARY
 
                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
   
             NINE MONTHS ENDED MARCH 31, 1997 AND 1998 (UNAUDITED)
    
 
1. PRESENTATION
 
     The accompanying unaudited consolidated financial statements have been
prepared in accordance with generally accepted accounting principles for interim
financial information and with the instructions of Article 10 of Regulation S-X.
Accordingly, the interim financial statements do not include all of the
information and footnotes required by generally accepted accounting principles
for annual financial statements.
 
   
     In the opinion of the management of DTI Holdings, Inc. (the "Company" or
"DTI") the accompanying unaudited consolidated financial statements contain all
adjustments (consisting of only normal recurring adjustments) necessary to
present fairly the financial information for the interim periods presented and
have been prepared in accordance with generally accepted accounting principles.
The interim results of operations are not necessarily indicative of results that
may be expected for any other interim period or for the full year.
    
 
   
     The financial statements should be read in conjunction with the
consolidated financial statements and notes thereto for the year ended June 30,
1997 included elsewhere in this document. The accounting policies used in
preparing these financial statements are the same as those described in the June
30, 1997 consolidated financial statements. Accordingly, footnote disclosures
which would substantially duplicate the disclosures in the audited financial
statements have been omitted.
    
 
     On September 23, 1997, DTI's Board of Directors and stockholders approved
the merger of KCDT with and into the Company, which merger became effective on
October 17, 1997.
 
     On December 23, 1997, the Company completed a corporate reorganization (the
"Reorganization"), pursuant to which DTI was formed as the parent holding
company of Digital Teleport, Inc., which became a wholly-owned subsidiary of
DTI. Pursuant to the Reorganization, the outstanding shares of common and
preferred stock of Digital Teleport were exchanged for the number of shares of
common and preferred stock of DTI having the same relative rights and
preferences as such shares. The Reorganization was required in connection with
the establishment of the Credit Facility. The business operations, name,
charter, by-laws and board of directors of the Company are identical in all
material respects to those of Digital Teleport, which did not change as a result
of the Reorganization. Accordingly, the consolidated financial statements have
been presented as if Digital Teleport had always been a wholly owned subsidiary
of DTI.
 
2. NETWORK AND EQUIPMENT
 
   
     Network and equipment consists of the following as of March 31, 1998:
    
 
   
<TABLE>
<S>                                                           <C>
Fiber optic cable plant.....................................  $49,141,905
Fiber optic terminal equipment..............................   11,646,390
Fiber optic network buildings...............................    2,050,973
Leasehold improvements......................................      292,951
Furniture, office equipment and other.......................      313,371
                                                              -----------
                                                               63,445,590
Less -- accumulated depreciation............................    2,620,640
                                                              -----------
                                                              $60,824,950
                                                              ===========
</TABLE>
    
 
   
     At March 31, 1998, fiber optic cable plant, fiber optic terminal equipment
and fiber optic network buildings include $19,581,920 of construction in
progress that was not in service and, accordingly, has not been depreciated.
Also, during the nine months ended March 31, 1998, $182,000 of interest costs
were capitalized.
    
 
                                      F-20
<PAGE>   141
 
   
3. SERIES A PREFERRED STOCK
    
 
   
     During the six months ended December 31, 1997, an additional 11,500 shares
of Series A Preferred Stock were issued for cash payments of $17,250,000. The
accretion towards redemption value of Series A Preferred Stock for the six month
period ending December 31, 1997 amounted to $4,985,442 which was recorded as a
charge to accumulated deficit. On February 13, 1998, the Company amended its
Articles of Incorporation amending the terms of the Series A Preferred Stock
such that the Series A Preferred Stock is no longer redeemable. The Series A
Preferred Stock, as a result of such an amendment made in conjunction with the
offering of Senior Discount Notes by the Company, has been classified with
stockholders' equity subsequent to such date.
    
 
4. STOCKHOLDERS DEFICIT
 
   
     On August 22, 1997 and on February 17, 1998, the Company approved stock
splits in the form of stock dividends of 99 shares and 999 shares, respectively,
of common stock for each one share of common stock outstanding. Effective
October 17, 1997 and February 18, 1998, the Company's Restated Articles of
Incorporation were amended to increase the number of authorized shares of common
stock of DTI to 100,000 and 100,000,000, respectively, and the stock dividends
were issued to the Company's stockholders. All share information included in the
accompanying financial statements has been retroactively adjusted to give effect
to the stock splits. In order to effect the 1,000 for 1 stock split of February
17, 1998, $269,970 was charged to accumulated deficit. The Company recorded an
entry in the third quarter of fiscal 1998 to reclassify this amount from
additional paid-in capital recorded in conjunction with the reclassification of
Series A Preferred Stock on February 13, 1998 as discussed in Note 7.
    
 
5. COMMITMENTS
 
   
     INCENTIVE PLAN -- On August 22, 1997, the Company adopted a Long-Term
Incentive Award Plan (the "Plan"). A total of 3,000,000 shares of common stock
of the Company have been reserved for issuance under the Plan. As of July 13,
1998, the Company has granted or is obligated to grant to certain employees and
directors of the Company options to purchase an aggregate of 725,000 shares of
common stock under the Plan. The employees' options vest 100% after five years
from the date of grant or, in the event the Company completes an initial public
offering of its common stock, 25% per year beginning one year from the date of
grant. The directors' options vest 25% per year beginning one year from the date
of grant. The exercise prices per share of such options range from $2.60 to
$6.66 as determined by the Board of Directors. No compensation expense is
required to be recorded with respect to such options.
    
 
   
     The Company accounts for its incentive plan in accordance with the
provisions of Accounting Principles Board (APB) Option No. 25, Accounting for
Stock Issued to Employees, and related interpretations. As such, compensation
expense is recorded on the date of grant only if the current market price of the
underlying stock exceeded the exercise price. The Company has also adopted SFAS
123, Accounting for Stock-Based Compensation, which permits entities to
recognize as expense over the vesting period the fair value of all stock-based
awards on the date of grant. Alternatively, SFAS 123 allows entities to apply
the provisions of APB Opinion No. 25 and provide pro forma net income for
employee stock option grants made in 1996 and future years as if the
fair-value-based method defined in SFAS 123 had been applied. The Company has
elected to apply the provisions of APB Opinion No. 25.
    
 
   
     PURCHASE COMMITMENTS -- DTI's remaining aggregate commitments for
construction and equipment under these agreements at March 31, 1998 is
approximately $20.1 million.
    
 
6. CONTINGENCIES
 
     On June 20, 1995, the Company and its President were named as defendants in
a suit which the plaintiff alleges that (i) the plaintiff entered into an oral
contract with the defendants pursuant to which the plaintiff was to receive a
percentage of the Company's common stock, (ii) the plaintiff provided services
to the Company for which the plaintiff was not and should be compensated, and
(iii) the defendants misrepresented certain facts to the plaintiff in order to
induce him to loan money and provide services to the defendants. Based
                                      F-21
<PAGE>   142
 
on these allegations, the plaintiff is suing for breach of contract and fraud
and is seeking actual monetary damages, punitive damages and a percentage of the
common stock of the Company. Management believes the plaintiff's claims are
without merit and intends to vigorously defend the claims. It is not possible to
determine what impact, if any, the outcome of this litigation might have on the
financial condition, results of operations or cash flows of the Company at this
time. The President has agreed personally to indemnify the Company against any
and all losses and damages resulting from any judgments and awards rendered
against the Company in this litigation. However, no guarantee can be made as to
the ability to satisfy all such amounts. The President has also agreed to
indemnify the holder of redeemable convertible preferred stock from such losses
and damages, and has pledged his stock ownership in the Company to secure such
obligation.
 
     The Company is involved in a dispute with a customer related to delays in
providing telecommunication services to the customer. In February 1998, the
Company received notice from a customer that it intends to setoff against
amounts payable to the Company approximately $400,000 as damages and penalties.
Management contends that the delays resulted from the customer's inability to
provide access and does not believe that ultimate settlement of this dispute
will have a material effect on the Company's financial position, results of
operations or cash flows.
 
     From time to time the Company is named as a defendant in routine lawsuits
incidental to its business. The Company believes that none of such current
proceedings, individually or in the aggregate, will have a material adverse
effect on the Company's financial position, results of operations or cash flows.
 
   
7. FINANCING ARRANGEMENTS
    
 
   
     In January 1998, Digital Teleport entered into a $30.0 million bank credit
facility (the "Credit Facility") with certain commercial lending institutions
and Toronto Dominion (Texas), Inc., as administrative agent for the lenders ("TD
(Texas)"), to fund its working capital requirements. Borrowings under the Credit
Facility bear interest at an adjustable rate based on (i) a base rate (either
the prime rate adopted by TD (Texas) or an adjusted Federal Funds rate) plus
1.75% or LIBOR plus 3.50% when the borrowing base ratio (total debt to property,
plant and equipment) is less than 30% and (ii) the base rate plus 1.20% or LIBOR
plus 3.00% when the borrowing base ratio is greater than 30%. In January 1998,
$3.0 million was borrowed under the Credit Facility. All amounts borrowed were
repaid in February 1998 using the proceeds of the Senior Discount Notes due 2008
discussed below. The Credit Facility was then cancelled.
    
 
   
     On February 23, 1998, the Company completed the issuance and sale of the
506,000 Units consisting of $506.0 million aggregate principal amount at
maturity of Senior Discount Notes due 2008 and warrants to purchase 3,926,560
shares of Common Stock, for which the Company received proceeds, net of
underwriting discounts and expenses, of approximately $264.8 million. No cash
payments of interest are required under the Notes prior to September 1, 2003.
Commencing at such time, the Company will be required to make semi-annual
interest payments on the Notes. The issuance of the Senior Discount Notes does
not constitute a "qualified public offering" within the meaning of the Company's
Articles of Incorporation and, therefore, will not effect the conversion of the
Series A Preferred Stock into common stock.
    
 
   
8. SUBSEQUENT EVENTS
    
 
   
     On April 14, 1998, the Company filed a Registration Statement on Form S-4
relating to an offer to exchange the Company's Series B Senior Discount Notes
due 2008 for its outstanding Senior Discount Notes (the "Exchange Offer"). The
Exchange Offer does not constitute a "qualified" offering within the meaning of
the Company's Articles of Incorporation and, therefore, will not effect the
conversion of the Series A Preferred Stock into common stock.
    
 
   
     On June 18, 1998, the Company entered into a preliminary agreement for a
long-term IRU for fiber optic strands and related facilities along a route from
Washington, D.C. to Texas.
    
 
                                      F-22
<PAGE>   143
 
                                                                        ANNEX A
                                    GLOSSARY
 
Access charges..........The fees paid by long distance carriers to LECs for
                        originating and terminating long distance calls on the
                        LECs' local networks.
 
Access tandem...........An interconnection point on an ILEC local network where
                        calls from central offices are aggregated for
                        transmission to other central offices and IXC
                        facilities.
 
   
Affiliate...............As defined in and for purposes of the Shareholders'
                        Agreement, an "affiliate" of KLT or the Company means
                        any person that directly, or indirectly though one or
                        more intermediaries, controls, or is controlled by, or
                        is under common control with KLT or the Company, as the
                        case may be, including without limitation, any director,
                        officer or employee of KLT or the Company, as the case
                        may be, and an "affiliate" of Mr. Weinstein means (i)
                        any director, officer, shareholder, member, partner,
                        trustee or owner of any corporation, organization or
                        other entity of which Mr. Weinstein is, directly or
                        indirectly, the beneficial owner of 5% or more of any
                        class of equity securities; and (ii) Mr. Weinstein's
                        spouse, parents, children, siblings, mothers and
                        fathers-in-law, sons and daughters-in-law, and brothers
                        and sisters-in-law.
    
 
ATM (Asynchronous
Transfer Mode)..........An information transfer standard that is one of a
                        general class of packet technologies that relay traffic
                        by way of an address contained within the first five
                        bytes of a standard fifty-three-byte-long packet or
                        cell. The ATM format can be used by many different
                        information systems, including area networks, to deliver
                        traffic at varying rates, permitting a mix of voice,
                        data and video (multimedia).
 
AT&T....................AT&T Corp.
 
Bandwidth...............The relative range of analog frequencies or digital
                        signals that can be passed through a transmission
                        medium, such as glass fibers, without distortion. The
                        greater the bandwidth, the greater the information
                        carrying capacity. Bandwidth is measured in Hertz
                        (analog) or Bits Per Second (digital).
 
   
Broadband...............Data streams of at least 1.544 megabits per second.
                        Broadband communications systems can transmit large
                        quantities of voice, data and video by way of digital or
                        analog signals. Examples of broadband communications
                        systems include DS-3 systems, which can transmit 672
                        simultaneous voice conversations, or a broadcast
                        television station signal that transmits high resolution
                        audio and video signals into the home. Broadband
                        connectivity is an essential element for interactive
                        multimedia applications.
    
 
Capacity................Refers to transmission.
 
Carrier.................A provider of communications transmission services by
                        fiber, wire or radio.
 
Central offices.........The switching centers or central switching facilities of
                        the ILECs.
 
Centrex.................Centrex is a service that offers features similar to
                        those of a Private Branch Exchange (PBX), except the
                        equipment is located at the carrier's premises and not
                        at the premises of the customer. These features include
                        direct dialing within a given phone system, direct
                        dialing of incoming calls, and automatic identification
                        of outbound calls. This is a value-added service that
                        carriers can
 
                                       A-1
<PAGE>   144
 
                        provide to a wide range of customers who don't have the
                        size or the funds to support their own on-site PBX.
 
   
CLEC (Competitive Local
Exchange Carrier).......A company that competes with ILECs in local services
                        markets.
    
 
Collocation.............The ability of a CLEC such as the Company to connect its
                        network to the ILEC's central offices. Physical
                        collocation occurs when a CLEC places its network
                        connection equipment inside the ILEC's central offices.
                        Virtual colocation is an alternative to physical
                        collocation pursuant to which the ILEC permits a CLEC to
                        connect its network to the ILEC's central offices on
                        comparable terms, even though the CLEC's network
                        connection equipment is not physically located inside
                        the central offices.
 
Common carrier..........A government-defined group of private companies offering
telecommunications services or facilities to the general public on a
                        non-discriminatory basis.
 
   
Conduit.................A pipe, usually made of metal, ceramic or plastic, that
                        protects buried cables.
    
 
   
Customer drop routes....Fiber optic facilities that connect a network to
                        end-user customer sites.
    
 
   
Data transmission
services................Services involving the nonvoice transmission of facts,
                        concepts or information in a formalized manner, suitable
                        for communication, interpretation or processing.
    
 
Dark fiber..............Fiber that lacks the requisite electronic and optronic
                        equipment necessary to use the fiber for transmission.
 
   
Dialing parity..........One of the changes, required by the Telecom Act,
                        intended to level the competitive playing field. Dialing
                        parity when implemented will enable customers to dial
                        only 1+ or 0+ for service no matter which local or long
                        distance carrier they choose.
    
 
Digital.................Describes a method of storing, processing and
                        transmitting information through the use of distinct
                        electronic or optical pulses that represent the binary
                        digits 0 and 1. Digital transmission/switching
                        technologies employ a sequence of discrete, distinct
                        pulses to represent information, as opposed to the
                        continuously variable analog signal.
 
Dense wavelength
division multiplexing...A technique for transmitting eight or more different
                        light wave frequencies on a single fiber to increase the
                        information carrying capacity.
 
   
DS-0, DS-1, DS-3........Standard telecommunications industry digital signal
                        formats, which are distinguishable by bit rate (the
                        number of binary digits 0 and 1) transmitted per
                        second). DS-0 service has a bit rate of 64 kilobits per
                        second and typically transmits only the equivalent of
                        one voice conversation at a time. DS-1 service has a bit
                        rate of 1.544 megabits per second and typically
                        transmits the equivalent of 24 simultaneous voice
                        conversations. DS-3 service has a bit rate of 45
                        megabits per second and typically transmits the
                        equivalent of 672 simultaneous voice conversations.
    
 
   
End-user................The occupant of the premises who uses and pays for the
                        telephone service received and does not resell it to
                        others.
    
 
Equal access............The basis upon which customers of interexchange carriers
                        are able to obtain access to their Primary Interexchange
                        Carriers' (PIC) long distance telephone
 
                                       A-2
<PAGE>   145
 
                        network by dialing "1", thus eliminating the need to
                        dial additional digits and an authorization code to
                        obtain such access.
 
   
Facilities-based
provider................A carrier that owns, obtains an indefensible right to
                        use in or, under some circumstances, leases its
                        international network facilities (including undersea
                        fiber optic cables and switching facilities) rather than
                        reselling private lines or minutes of telecommunications
                        service provided by another facilities based provider.
    
 
FCC.....................Federal Communications Commission.
 
   
Fiber optics............A technology in which light is used to transport
                        information from one point to another. Fiber optic
                        cables are thin filaments of glass through which light
                        beams are transmitted over long distances carrying large
                        amounts of data.
    
 
   
Frame relay.............A high-speed, data-packet switching service used to
                        transmit data between computers. Frame Relay supports
                        data units of variable lengths at access speeds ranging
                        from 56 kilobits per second to 1.5 megabits per second.
                        This service is well-suited for connecting local area
                        networks, but is not presently well suited for voice and
                        video applications due to the variable delays which can
                        occur. Frame Relay was designed to operate at high
                        speeds on modern fiber optic networks.
    
 
Fujitsu.................Fujitsu Network Transmission Systems, Inc.
 
   
GTE.....................GTE Corp.
    
 
ILEC (Incumbent Local
Exchange Carrier).......The incumbent carrier providing local exchange services,
                        typically an RBOC created by the divestiture of AT&T.
 
   
Innerduct...............Normally a 1 1/4" or 1" pipe through which fiber optic
                        cable is installed and housed; usually placed in groups
                        of 2 or 3 inside a larger duct or conduit.
    
 
ISP (Internet Service
Provider)...............A company that provides businesses and consumers with
                        access to the Internet.
 
10XXX service...........The ability for a user to access any carrier's long
                        distance network by dialing the carrier's Carrier
                        Identification Code (CIC) which is a 1 plus 0 plus three
                        specifically assigned digits, thereby bypassing the
                        user's primary interexchange carrier.
 
Interconnection.........Connection of a telecommunications device or service to
                        the public switched telephone network.
 
IXC (Interexchange
Carrier)................A company providing inter-LATA or long distance services
                        between LATAs on an intrastate or interstate basis.
 
IXC Carrier.............IXC Carrier, Inc.
 
KCPL....................Kansas City Power and Light Company
 
KLT.....................KLT Telecom Inc.
 
LATAs (Local Access and
Transport Areas)........The approximately 200 geographic areas that define the
                        areas between which the RBOCs currently are prohibited
                        from providing long distance services.
 
                                       A-3
<PAGE>   146
 
Lit or lighted fiber....Fiber activated or equipped with the requisite
                        electronic and optronic equipment necessary to use the
                        fiber for transmission.
 
   
LEC (local exchange
carrier)................A company providing local switched services, including
                        ILECs and CLECs.
    
 
Local exchange
services................Local exchange services generally refers to all services
                        provided by an ILEC or CLEC including local dial tone,
                        Centrex and long distance access services. Sometimes
                        also referred to as local switched telephone services
                        and local telecommunications services.
 
Local loop..............A circuit that connects an end user to the ILEC central
                        office within a LATA.
 
   
Local switched
services................Services provided where the computer telephony system is
                        directly connected to the switch, generally providing
                        better integration than connections than take place over
                        a network.
    
 
Long-haul circuit.......A dedicated telecommunications circuit generally between
                        locations in different LATAs.
 
MCI.....................MCI Communications, Inc.
 
MFS Communications......MFS Communications Company, Inc., a wholly owned
                        subsidiary of WorldCom.
 
MHTC....................Missouri Highway and Transportation Commission
 
Multiplexing............An electronic or optical process that combines a large
                        number of lower speed transmission lines into one high
                        speed line by splitting the total available bandwidth
                        into narrower bands (frequency division), or by
                        allotting a common channel to several different
                        transmitting devices, one at a time in sequence (time
                        division).
 
   
Non-facilities based
provider................A LEC that does not own and operate its own network and
                        equipment.
    
 
Nortel..................Northern Telecom Inc.
 
   
OC-3, OC-12, OC-48 and
OC-192..................Standard telecommunications industry measurements for
                        optical transmission capacity distinguishable by bit
                        rate transmitted per second and the number of voice or
                        data transmissions that can be simultaneously
                        transmitted through fiber optic cable. An OC-3 is
                        generally equivalent to three DS-3s and has a bit rate
                        of 155.52 megabits per second and can transmit 2,016
                        simultaneous voice or data transmissions. An OC-12 has a
                        bit rate of 622.08 megabits per second and can transmit
                        8,064 simultaneous voice or data transmissions. An OC-48
                        has a bit rate of 2,488.32 megabits per second and can
                        transmit 32,256 simultaneous voice or data
                        transmissions. An OC-192 has a bit rate of 9,953.28
                        megabits per second and can transmit 129,024
                        simultaneous voice or data transmissions.
    
 
   
Optical window..........A band of wavelengths at which an optical fiber is
                        sufficiently transparent for practical use in
                        communications applications.
    
 
PBX (Private Branch
Exchange)...............A PBX is a switching system within an office building
                        which allows calls from outside to be routed directly to
                        the individual instead of through a central number. This
                        PBX also allows for calling within an office by way of
                        four-digit extensions. Centrex is a service which can
                        simulate this service from an outside
 
                                       A-4
<PAGE>   147
 
                        switching source, thereby eliminating the need for a
                        large capital expenditure required for a PBX.
 
Pirelli.................Pirelli Cable Corporation
 
POPs
(Points of Presence)....Locations where a long distance carrier has installed
                        transmission equipment in a service area that serves as,
                        or relays calls to, a network switching center of that
                        long distance carrier.
 
Private line............A private, dedicated telecommunications line connecting
                        different end user locations or end-user facilities to
                        LEC or IXC facilities.
 
PUC (Public Utility
Commission).............A state regulatory body, established in most states,
                        which regulates utilities, including telephone companies
                        providing intrastate services.
 
RBOCs (Regional Bell
Operating Companies)....The seven local telephone companies (formerly part of
                        AT&T) established as a result of the AT&T Divestiture
                        Decree.
 
Regeneration/amplifier...
                        Devices which automatically re-transmit or boost signals
                        on an outbound circuit.
 
Reseller................A carrier that does not own transmission facilities, but
                        obtains communications services from another carrier for
                        resale to the public.
 
Route miles.............The number of miles of the telecommunications path in
                        which fiber optic cables are installed as it would
                        appear on a network map.
 
SBC.....................SBC Communications, Inc.
 
Siecor..................Siecor Corporation
 
Single-mode fiber.......A fiber optic wave guide with a slender core that
                        confines light to a single path; a fiber that allows the
                        transmission of only one light beam or lightwave
                        channel.
 
   
SMF-28A.................One of several types of standard fiber optic strands
                        used by carriers.
    
 
SONET (Synchronous
Optical Network
Technology).............An electronics and network architecture for
                        variable-bandwidth products which enables transmission
                        of voice, data and video (multimedia) at very high
                        speeds.
 
SONET ring..............A network architecture which provides for instantaneous
                        restoration of service in the event of a fiber cut by
                        automatically rerouting traffic the other direction
                        around the ring. This occurs so rapidly (in 50
                        milliseconds) it is virtually undetectable to the user.
 
Sprint..................Sprint Corporation
 
Switch..................A device that selects the paths or circuits to be used
                        for transmission of information and a connection.
                        Switching is the process of interconnecting circuits to
                        form a transmission path between users and it also
                        captures information for billing purposes.
 
TelCentral..............Tel Central, Inc.
 
Telecom Act.............The Telecommunications Act of 1996.
 
                                       A-5
<PAGE>   148
 
   
Terminal................The point at which a telephone line ends or is connected
                        to other circuits of a network.
    
 
Tier 1 carriers.........AT&T, MCI, Sprint and WorldCom
 
Union Electric..........Ameren Corporation, formerly known as Union Electric
                        Company.
 
United Telephone........United Telephone Company of Missouri, a wholly owned
                        subsidiary of Sprint.
 
   
Virtual circuit.........A communication link that appears to an end-user to be a
                        dedicated point-to-point circuit. Virtual circuits are
                        usually set up on a per-call basis and disconnected when
                        the call is ended.
    
 
WorldCom................WorldCom, Inc.
 
                                       A-6
<PAGE>   149
 
- ------------------------------------------------------
- ------------------------------------------------------
 
     NO PERSON HAS BEEN AUTHORIZED TO GIVE ANY INFORMATION OR TO MAKE ANY
REPRESENTATIONS IN CONNECTION WITH THIS OFFERING OTHER THAN THOSE CONTAINED IN
THIS PROSPECTUS, AND, IF GIVEN OR MADE, SUCH INFORMATION OR REPRESENTATIONS MUST
NOT BE RELIED UPON AS HAVING BEEN AUTHORIZED BY THE COMPANY. THIS PROSPECTUS
DOES NOT CONSTITUTE AN OFFER TO SELL OR THE SOLICITATION OF ANY OFFER TO BUY ANY
SECURITY OTHER THAN THOSE TO WHICH IT RELATES, NOR DOES IT CONSTITUTE AN OFFER
TO SELL TO, OR THE SOLICITATION OF ANY OFFER TO BUY, ANY SECURITIES OTHER THAN
THE EXCHANGE NOTES OFFERED HEREBY OR TO ANY PERSON IN ANY JURISDICTION IN WHICH
SUCH OFFER OR SOLICITATION IS NOT AUTHORIZED, OR IN WHICH THE PERSON MAKING SUCH
OFFER OR SOLICITATION IS NOT QUALIFIED TO DO SO, OR TO ANY PERSON TO WHOM IT IS
UNLAWFUL TO MAKE SUCH OFFER OR SOLICITATION. NEITHER THE DELIVERY OF THIS
PROSPECTUS NOR ANY SALE MADE HEREUNDER SHALL UNDER ANY CIRCUMSTANCES, CREATE ANY
IMPLICATION THAT THERE HAS BEEN NO CHANGE IN THE AFFAIRS OF THE COMPANY SINCE
THE DATE HEREOF OR THAT THE INFORMATION CONTAINED HEREIN IS CORRECT AS OF ANY
TIME SUBSEQUENT TO THE DATE HEREOF.
 
                            ------------------------
 
                               TABLE OF CONTENTS
 
   
<TABLE>
<CAPTION>
                                         PAGE
                                         ----
<S>                                      <C>
Notice to Investors....................    3
Available Information..................    4
Summary................................    6
Risk Factors...........................   17
The Exchange Offer.....................   29
Use of Proceeds........................   38
Capitalization.........................   38
Selected Consolidated Financial and
  Operating Data.......................   39
Management's Discussion and Analysis of
  Financial Condition and Results of
  Operations...........................   41
Industry Overview......................   50
Business...............................   53
Management.............................   71
Certain Relationships and Related
  Transactions.........................   75
Principal Stockholders.................   76
Description of the Notes...............   77
Description of the Warrants............  103
Book-Entry; Delivery and Form..........  110
Certain United States Federal Income
  Tax Considerations...................  112
Plan of Distribution...................  119
Legal Matters..........................  119
Experts................................  119
Index to Consolidated Financial
  Statements...........................  F-1
Glossary...............................  A-1
</TABLE>
    
 
   
     Until           , 1998, all dealers effecting transactions in the
registered securities, whether or not participating in this distribution, may be
required to deliver a prospectus. This is in addition to the obligation of
dealers to deliver a prospectus when acting as underwriters and with respect to
their unsold allotments or subscriptions.
    
 
- ------------------------------------------------------
- ------------------------------------------------------
- ------------------------------------------------------
- ------------------------------------------------------
 
                           DTI DIGITAL TELEPORT LOGO
 
                               DTI HOLDINGS, INC.
 
                               OFFER TO EXCHANGE
                     12 1/2% SERIES B SENIOR DISCOUNT NOTES
                                    DUE 2008
                       FOR ALL OUTSTANDING 12 1/2% SENIOR
                            DISCOUNT NOTES DUE 2008
                                            , 1998
 
- ------------------------------------------------------
- ------------------------------------------------------
<PAGE>   150
 
                                    PART II
                     INFORMATION NOT REQUIRED IN PROSPECTUS
 
ITEM 20. INDEMNIFICATION OF DIRECTORS AND OFFICERS
 
     Sections 351.355(1) and (2) of The General and Business Corporation Law of
the State of Missouri provide that a corporation may indemnify any person who
was or is a party or is threatened to be made a party to any threatened, pending
or completed action, suit or proceeding by reason of the fact that he is or was
a director, officer, employee or agent of the corporation, or is or was serving
at the request of the corporation as a director, officer, employee or agent of
another corporation, partnership, joint venture, trust or other enterprise,
against expenses, judgments, fines and amounts paid in settlement actually and
reasonably incurred by him in connection with such action, suit or proceeding if
he acted in good faith and in a manner he reasonably believed to be in or not
opposed to the best interests of the corporation and, with respect to any
criminal action or proceeding, had no reasonable cause to believe his conduct
was unlawful, except that, in the case of an action or suit by or in the right
of the corporation, the corporation may not indemnify such persons against
judgments and fines and no person shall be indemnified as to any claim, issue or
matter as to which such person shall have been adjudged to be liable for
negligence or misconduct in the performance of his duty to the corporation,
unless and only to the extent that the court in which the action or suit was
brought determines upon application that such person is fairly and reasonably
entitled to indemnity for proper expenses. Section 351.355(3) provides that, to
the extent that a director, officer, employee or agent of the corporation has
been successful in the defense of any such action, suit or proceeding or any
claim, issue or matter therein, he shall be indemnified against expenses,
including attorneys' fees, actually and reasonably incurred in connection with
such action, suit or proceeding. Section 351.355(7) provides that a corporation
may provide additional indemnification to any person indemnifiable under
subsection (1) or (2), provided such additional indemnification is authorized by
the corporation's articles of incorporation or an amendment thereto or by a
shareholder-approved bylaw or agreement, and provided further that no person
shall thereby be indemnified against conduct which was finally adjudged to have
been knowingly fraudulent, deliberately dishonest or willful misconduct or which
involved an accounting for profits pursuant to Section 16(b) of the Securities
Exchange Act of 1934.
 
     Section 6.5 of the Company's Bylaws provides that the Company shall
indemnify to the full extent authorized by law any person made or threatened to
be made a party to any action, suit or proceeding, whether criminal, civil,
administrative or investigative, by reason of the fact that he, his testator or
intestate is or was a director or officer of the Company or any predecessor of
the Company or serves or served any other enterprise as a director, officer or
employee at the request of the Company or any predecessor of the Company.
Section 6.5 of the Bylaws also provides that the Company may, in the sole
discretion of the Board of Directors, indemnify to the full extent authorized by
law any person made or threatened to be made a party to any action, suit or
proceeding, whether criminal, civil, administrative or investigative, by reason
of the fact that he, his testator or intestate is or was an employee of the
Company or any predecessor of the Company.
 
     The Company has entered into an indemnification agreement with each
Director pursuant to which the Company agreed to indemnify the Director and hold
him harmless to the full extent authorized or permitted by Missouri law subject
to limitations based on the Director's conduct. The indemnification agreements
provide that the Company shall make advances as reasonably necessary to pay
expenses of the Director incurred in defending an action against the Director in
such capacity.
 
     The directors and officers of the Company are insured under a policy of
directors' and officers' liability insurance.
 
ITEM 21. EXHIBITS AND FINANCIAL STATEMENT SCHEDULES
 
     See index to Exhibits.
 
                                      II-1
<PAGE>   151
 
ITEM 22. UNDERTAKINGS
 
   
          (a) The undersigned registrant hereby undertakes that insofar as
     indemnification for liabilities arising under the Securities Act of 1933,
     as amended, may be permitted to directors, officers and controlling persons
     of the Registrant pursuant to the foregoing provisions, or otherwise, the
     Registrant has been advised that in the opinion of the Securities and
     Exchange Commission such indemnification is against public policy as
     expressed in the Act and is, therefore, unenforceable. In the event that a
     claim for indemnification against such liabilities (other than the payment
     by the Registrant of expenses incurred or paid by a director, officer or
     controlling person of the Registrant in the successful defense of any
     action, suit or proceeding) is asserted by such director, officer or
     controlling person in connection with the securities being registered, the
     Registrant will, unless in the opinion of its counsel the matter has been
     settled by controlling precedent, submit to a court of appropriate
     jurisdiction the question whether such indemnification by it is against
     public policy as expressed in the Securities Act and will be governed by
     the final adjudication of such issue.
    
 
   
          (b) The undersigned registrant hereby undertakes to respond to
     requests for information that is incorporated by reference into the
     Prospectus pursuant to Items 4, 10(b), 11 or 13 of this form, within one
     business day of receipt of such request, and to send the incorporated
     documents by first class mail or other equally prompt means. This includes
     information contained in documents filed subsequent to the effective date
     of the Registration Statement through the date of responding to the
     request.
    
 
   
          (c) The undersigned registrant hereby undertakes to supply by means of
     a post-effective amendment all information concerning a transaction and the
     company being acquired involved therein, that was not the subject of and
     included in the registration statement when it became effective.
    
 
                                      II-2
<PAGE>   152
 
                                   SIGNATURES
 
   
Pursuant to the requirements of the Securities Act of 1933, as amended, the
registrant has duly caused this Amendment No. 1 to Registration Statement to be
signed on its behalf by the undersigned thereunto duly authorized, in the City
of St. Louis, State of Missouri on July 10, 1998.
    
 
                                          DTI HOLDINGS, INC.
 
                                          By:   /s/ RICHARD D. WEINSTEIN
                                            ------------------------------------
                                                    Richard D. Weinstein
                                             President, Chief Executive Officer
                                                        and Secretary
 
   
     Pursuant to the requirements of the Securities Act of 1933, as amended,
this registration statement has been signed by the following persons in the
capacities indicated on July 10, 1998.
    
 
   
<TABLE>
<CAPTION>
                  SIGNATURE                                          TITLE
                  ---------                                          -----
<C>                                              <S>
 
          /s/ RICHARD D. WEINSTEIN               President, Chief Executive Officer Secretary
- ---------------------------------------------    and Director (Principal Executive Officer)
            Richard D. Weinstein
 
            /s/ GARY W. DOUGLASS                 Senior Vice President and Chief Financial
- ---------------------------------------------    Officer (Principal Financial and Accounting
              Gary W. Douglass                   Officer)
 
            /s/ JEROME W. SHEEHY*                Vice President -- Regulatory Affairs and
- ---------------------------------------------    Director
              Jerome W. Sheehy
 
              /s/ R. G. WASSON*                  Director
- ---------------------------------------------
              Ronald G. Wasson
 
             /s/ B. J. BEAUDOIN*                 Director
- ---------------------------------------------
             Bernard J. Beaudoin
 
           /s/ JAMES V. O'DONNELL*               Director
- ---------------------------------------------
             James V. O'Donnell
 
            /s/ KENNETH V. HAGER*                Director
- ---------------------------------------------
              Kenneth V. Hager
 
        *By: /s/ RICHARD D. WEINSTEIN
- ---------------------------------------------
              Attorney- in-Fact
</TABLE>
    
 
                                      II-3
<PAGE>   153
 
                               INDEX TO EXHIBITS
 
   
<TABLE>
<CAPTION>
EXHIBIT
NUMBER                            DESCRIPTION
- -------                           -----------
<C>       <S>
   3.1    Restated Articles of Incorporation of the Registrant.
   3.2    Restated Bylaws of the Registrant.
  *4.1    Indenture by and between the Registrant and The Bank of New
          York, as Trustee, for the Registrant's 12 1/2% Senior
          Discount Notes due 2008, dated February 23, 1998 (the
          "Indenture") (including form of the Company's 12 1/2% Senior
          Discount Note due 2008 and 12 1/2% Series B Senior Discount
          Note due 2008).
  *4.2    Note Registration Rights Agreement by and among the
          Registrant and the Initial Purchasers named therein, dated
          as of February 23, 1998.
  *4.3    Warrant Agreement by and between the Registrant and The Bank
          of New York, as Warrant Agent, dated February 23, 1998.
  *4.4    Warrant Registration Rights Agreement by and among the
          Registrant and the Initial Purchasers named therein, dated
          February 23, 1998.
  *4.5    Digital Teleport, Inc. Shareholders' Agreement between
          Richard D. Weinstein and KLT Telecom Inc., dated March 12,
          1997.
  *4.6    Amendment No. 1 to the Digital Teleport, Inc. Shareholders'
          Agreement, dated November 7, 1997.
  *4.7    Amendment No. 2 to the Digital Teleport, Inc. Shareholders'
          Agreement, dated December 18, 1997.
  *4.8    Amendment No. 3 to the Digital Teleport, Inc. Shareholders'
          Agreement, dated February 12, 1998.
  *4.9    Stock Pledge Agreement between Richard D. Weinstein and KLT
          Telecom Inc., dated March 12, 1997, securing the performance
          of Digital Teleport, Inc.'s obligations under that certain
          Stock Purchase Agreement dated as of December 31, 1996, as
          amended.
  *4.10   Amendment No. 1 to Stock Pledge Agreement between Richard D.
          Weinstein and KLT Telecom Inc., dated December 18, 1997.
  *4.11   Amendment No. 2 to Stock Pledge Agreement between Richard D.
          Weinstein and KLT Telecom Inc., dated February 12, 1998.
  *4.12   Subordination Agreement, by and among the Registrant,
          Digital Teleport, Inc., KLT Telecom Inc. and Richard D.
          Weinstein, dated February 12, 1998.
   5.1    Legal Opinion of Bryan Cave LLP (Missouri).
   8.1    Tax Opinion of Bryan Cave LLP (Missouri) (included in its
          opinion filed as Exhibit 5.1 hereto).
 *10.1    Employment Agreement between Digital Teleport, Inc. and
          Richard D. Weinstein, dated December 31, 1996.
 *10.2    Director Indemnification Agreement between the Registrant
          and Richard D. Weinstein, dated December 23, 1997.
 *10.3    Director Indemnification Agreement between the Registrant
          and Jerome W. Sheehy, dated December 23, 1997.
 *10.4    Director Indemnification Agreement between the Registrant
          and Bernard J. Beaudoin, dated December 23, 1997.
 *10.5    Director Indemnification Agreement between the Registrant
          and Ronald G. Wasson, dated December 23, 1997.
</TABLE>
    
 
- ---------------
 
   
<TABLE>
<C>       <S>
* Previously.
  Filed
</TABLE>
    
<PAGE>   154
 
   
<TABLE>
<CAPTION>
EXHIBIT
NUMBER                            DESCRIPTION
- -------                           -----------
<C>       <S>
 *10.6    Director Indemnification Agreement between the Registrant
          and James V. O'Donnell, dated December 23, 1997.
 *10.7    Director Indemnification Agreement between the Registrant
          and Kenneth V. Hager, dated December 23, 1997.
 *10.8    1997 Long-Term Incentive Award Plan of the Registrant.
 *10.9    Employment Agreement between Digital Teleport, Inc. and
          Robert F. McCormick, dated September 9, 1997.
 *10.10   Amendment No. 1 to the Employment Agreement between Digital
          Teleport, Inc. and Robert F. McCormick, dated January 28,
          1998.
 *10.11   Amendment No. 2 to the Employment Agreement between Digital
          Teleport, Inc. and Robert F. McCormick, dated January 28,
          1998.
*++10.12  Product Attachment -- Carrier Networks Products Agreement
          between Digital Teleport, Inc. and Northern Telecom, Inc.,
          effective October 23, 1997.
 *10.13   Agreement re: Fiber Optic Cable on Freeways in Missouri,
          between the Missouri Highway and Transportation Commission
          and Digital Teleport, Inc., effective July 29, 1994.
 *10.14   First Amendment to Agreement re: Fiber Optic Cable on
          Freeways in Missouri, between the Missouri Highway and
          Transportation Commission and Digital Teleport, Inc.,
          effective September 22, 1994.
 *10.15   Second Amendment to Agreement re: Fiber Optic Cable on
          Freeways in Missouri, between the Missouri Highway and
          Transportation Commission and Digital Teleport, Inc.,
          effective November 7, 1994.
 *10.16   Third Amendment to Agreement re: Fiber Optic Cable on
          Freeways in Missouri, between the Missouri Highway and
          Transportation Commission and Digital Teleport, Inc.,
          effective October 9, 1996.
 *10.17   Contract Extension to Agreement re: Fiber Optic Cable on
          Freeways in Missouri, between the Missouri Department of
          Transportation (as successor to the Missouri Highway and
          Transportation Commission) and Digital Teleport, Inc., dated
          February 7, 1997.
 *10.18   Fiber Optic Cable Agreement, between the Arkansas State
          Highway and Transportation Department and Digital Teleport,
          Inc., dated May 29, 1997.
  10.19   Missouri Interconnection Agreement between Southwestern Bell
          Telephone Company and Digital Teleport, Inc., executed July
          1, 1997.
  10.20   Arkansas Interconnection Agreement between Southwestern Bell
          Telephone Company and Digital Teleport, Inc., executed
          August 21, 1997.
  10.21   Kansas Interconnection Agreement between Southwestern Bell
          Telephone Company and Digital Teleport, Inc., executed
          August 21, 1997.
  10.22   Oklahoma Interconnection Agreement between Southwestern Bell
          Telephone Company and Digital Teleport, Inc., executed
          August 21, 1997.
  10.23   Missouri Interconnection, Resale and Unbundling Agreement
          between GTE Midwest Incorporated, GTE Arkansas Incorporated
          and Digital Teleport, Inc. executed November 7, 1997.
</TABLE>
    
 
- -------------------------
   
*  Previously Filed.
    
   
++ Confidential treatment has been requested with respect to certain portions of
   this Exhibit.
    
<PAGE>   155
 
   
<TABLE>
<CAPTION>
EXHIBIT
NUMBER                            DESCRIPTION
- -------                           -----------
<C>       <S>
  10.24   Arkansas Interconnection, Resale and Unbundling Agreement
          between GTE Southwest Incorporated, GTE Midwest
          Incorporated, GTE Arkansas Incorporated and Digital
          Teleport, Inc. executed November 7, 1997.
  10.25   Oklahoma Interconnection, Resale and Unbundling Agreement
          between GTE Southwest Incorporated, GTE Arkansas
          Incorporated, GTE Midwest and Digital Teleport, Inc.,
          executed November 7, 1997.
  10.26   Texas Interconnection, Resale and Unbundling Agreement
          between GTE Southwest Incorporated and Digital Teleport,
          Inc., executed November 18, 1997.
  10.27   Kansas Master Resale Agreement between United Telephone
          Company of Kansas (Sprint) and Digital Teleport, Inc., dated
          September 30, 1997.
 *10.28   Commercial Lease between Richard D. Weinstein and Digital
          Teleport, Inc., dated December 31, 1996.
 *10.29   Commercial Lease Extension Agreement between Richard D.
          Weinstein and Digital Teleport, Inc., dated December 31,
          1997.
 *10.30   Purchase Agreement by and between the Registrant and the
          Initial Purchasers named therein, dated as of February 13,
          1998.
**10.31   Stock Purchase Agreement by and between KLT Telecom Inc. and
          Digital Teleport, Inc., dated December 31, 1996.
  10.32   Amendment No. 1 to Stock Purchase Agreement between KLT
          Telecom Inc. and Digital Teleport, Inc. dated February 12,
          1998.
  10.33   Consulting Agreement between Digital Teleport, Inc. and H.P.
          Scott, dated May 4, 1998.
  12.1    Statement re Computation of Ratio of Earnings to Fixed
          Charges.
 *21.1    Subsidiaries of the Registrant.
  23.1    Consent of Deloitte & Touche LLP.
  23.2    Consent of Bryan Cave LLP (Missouri) (included in its
          opinion filed as Exhibit 5.1 hereto).
  24.1    Power of Attorney (contained in signature page).
  25.1    Statement of Eligibility and Qualification on Form T-1 under
          the Trust Indenture Act of 1939 of The Bank of New York, as
          Trustee under the Indenture.
  27.1    Financial Data Schedule
  99.1    Form of Letter of Transmittal.
  99.2    Form of Notice of Guaranteed Delivery.
  99.3    Form of Letter to Brokers, Dealers, Commercial Banks, Trust
          Companies and Other Nominees.
  99.4    Form of Letter to Clients.
  99.5    Guidelines for Certification of Taxpayer Identification
          Number on Form W-9 (included in the Form of Letter of
          Transmittal filed as Exhibit 99.1 herein).
  99.6    Form of Exchange Agent Agreement.
</TABLE>
    
 
- -------------------------
   
 * Previously filed.
    
   
** Schedule omitted pursuant to Item 601 of Regulation S-K of the Commission.
    

<PAGE>   1
                                                                    EXHIBIT 3.1


                       RESTATED ARTICLES OF INCORPORATION
                                       OF
                               DTI HOLDINGS, INC.


         DTI HOLDINGS, INC., a Missouri corporation (the "Corporation"), hereby
certifies to the Secretary of State of Missouri that the Corporation desires to
restate its Articles of Incorporation as currently in effect and the following
Restated Articles of Incorporation are all of the provisions of the Articles of
Incorporation of the Corporation as theretofore amended and that these Restated
Articles of Incorporation correctly set forth without change the corresponding
provisions of such Articles of Incorporation as theretofore amended. These
Restated Articles of Incorporation supersede the original Articles of
Incorporation and all amendments thereto.

         These Restated Articles of Incorporation were duly approved by the
directors of the Corporation and adopted on behalf of the Corporation by written
consent in lieu of a meeting, dated April 8, 1998.

                                   ARTICLE ONE

         The name of the corporation (hereinafter referred to as the
"Corporation") is: DTI HOLDINGS, INC.

                                   ARTICLE TWO

         The address, including street and number, if any, or the corporation's
initial registered office in this state is 11111 Dorsett Road, St. Louis,
Missouri 63043 and the name of its initial agent at such address is Richard D.
Weinstein.

                                  ARTICLE THREE

I.       Authorization of Shares

                  The aggregate number of shares of capital stock which the
Corporation has authority to issue is 100,050,000 shares, consisting of:

                  A.       100,000,000 shares of common stock, par value $.01 
         per share (the "Common Stock");

                  B.       50,000 shares of preferred stock, par value $.01 per 
         share (the "Preferred Stock").



<PAGE>   2

II.      Preferred Stock

         A. General. The Board of Directors of the Corporation is hereby
authorized to determine all rights, preferences and privileges and
qualifications, limitations and restrictions of the Preferred Stock (including,
without limitation, voting rights and the limitation and exclusion thereof)
granted to or imposed upon any unissued series of Preferred Stock and the number
of shares constituting any such series and the designation thereof, and to
increase or decrease (but not below the number of shares of such series then
outstanding) the number of shares of any series subsequent to the issue of
shares of that series then outstanding. Unless otherwise provided in a
particular certificate of designation relating to a series of Preferred Stock,
in case the number of shares of any series is so decreased, the shares
constituting such reduction shall resume the status which such shares had prior
to the adoption of the resolution originally fixing the number of shares of such
series.

         B. Series A Preferred Stock

         1. Designation. Thirty Thousand (30,000) shares of the authorized and
unissued Preferred Stock of the Corporation shall be designated as "Series A
Preferred Stock" and shall have the following rights and limitations.

         2. Dividends. Upon declaration of any dividend by the Board of
Directors of the Corporation on the Common Stock, the holder of each share of
Series A Preferred Stock shall be entitled to receive, out of any funds legally
available therefor, as adjusted appropriately for stock splits, stock dividends,
combinations or similar recapitalizations affecting the Series A Preferred
Stock, such dividends paid in cash or other assets as would be paid on each
share of Common Stock, or any other equity security, into which each share of
Series A Preferred Stock could be converted on the applicable record date. The
dividends shall be payable quarterly in arrears from the date on which a share
of the Series A Preferred Stock is first issued hereunder. The original dates of
issuance of the Series A preferred stock, par value $.01 per share, of Digital
Teleport, Inc. (the "DTI Series A Preferred Stock") to KLT Telecom Inc. ("KLT")
are herein referred to as the "Original Issue Dates".

         3. Liquidation, Dissolution or Winding Up and Voting.

            (a) Preference. In the event of any voluntary or involuntary
liquidation, dissolution or winding up of the Corporation (a "Liquidating
Event"), the holders of the then outstanding shares of Series A Preferred Stock
shall be entitled to be paid, prior and in preference to any distribution of any
of the assets or surplus funds of the Corporation to the holders of the Common
Stock of the Corporation by reason of their ownership thereof, out of the assets
of the Corporation available for distribution to its shareholders, $1,500 per
share of Series A Preferred Stock, subject to appropriate adjustment in the
event of any stock dividend, stock split, combination or other similar
recapitalization affecting the Series A Preferred Stock. If upon the occurrence
of any Liquidating Event the remaining assets of the Corporation available for
distribution to its shareholders shall be insufficient to pay the holders of
shares of Series A Preferred Stock the full amount to which they shall be
entitled, the holders of shares of Series A Preferred Stock shall share 



                                       2
<PAGE>   3

ratably in any distribution of the remaining assets and funds of the Corporation
in proportion to the respective amounts which would otherwise be payable in
respect of the shares held by them upon such distribution if all amounts payable
on or with respect to such shares were paid in full.

            (b) Common Stock. If, after the payment of all preferential amounts
required by subsection 3(a) above to be paid to the holders of Series A
Preferred Stock upon the occurrence of any Liquidating Event, any assets and
funds of the Corporation are legally available for distribution, a dividend
shall be payable on each share of Common Stock then outstanding, prior and in
preference to any further distribution of any of the assets or surplus funds of
the Corporation to the holders of the Series A Preferred Stock by reason of
their ownership thereof in an amount equal to the per share cash consideration
received by the Corporation upon its issuance of Common Stock to the initial
holder of such shares (as adjusted for any stock dividends, combinations or
splits with respect to such shares). Subject to the payment in full of the
liquidation preferences with respect to the Series A Preferred Stock as provided
in subsection 3(a) above, if upon the occurrence of such Liquidating Event, the
assets and funds thus distributed among the holders of the Common Stock shall be
insufficient to permit the payment to such holders of the full aforesaid
preferential amount, then the entire remaining assets and funds of the
Corporation legally available for distribution shall be distributed among the
holders of the Common Stock in proportion to the weighted value of shares of
Common Stock (as determined by the per share cash consideration received by the
Corporation upon issuance of the Common Stock to the original holder thereof)
then held by them.

            (c) Participation. After payment to the holders of the Common Stock
and the Series A Preferred Stock of the amounts set forth in subsections 3(a)
and (b) above, the entire remaining assets and funds of the Corporation legally
available for distribution, if any, shall be distributed among the holders of
the Common Stock and the Series A Preferred Stock in proportion to the shares of
Common Stock then held by them and the shares of Common Stock which they then
have the right to acquire upon conversion of the shares of Series A Preferred
Stock then held by them.

            (d) Voting. Each holder of outstanding shares of Series A Preferred
Stock shall be entitled to the number of votes equal to the number of whole
shares of Common Stock into which the shares of Series A Preferred Stock held by
such holder are convertible (as adjusted from time to time pursuant to Section 4
of this Article Three.II.B), at each meeting of shareholders of the Corporation
(and written actions of shareholders in lieu of meetings) with respect to any
and all matters presented to the shareholders of the Corporation for their
action or consideration. Except for any amendment affecting the rights and
obligations of holders of Series A Preferred Stock or as otherwise provided by
law, holders of Series A Preferred Stock shall vote together with the holders of
Common Stock as a single class. The holders of the Series A Preferred Stock
shall vote separately as a class with respect to any amendment affecting the
rights and obligations of holders of Series A Preferred Stock and as otherwise
required by law.

         4. Optional Conversion. The holders of the Series A Preferred Stock
shall have conversion rights as follows (the "Conversion Rights"):




                                       3
<PAGE>   4

            (a) Right to Convert. Each share of Series A Preferred Stock shall
be convertible, at the option of the holder thereof, at any time and from time
to time, into one share of Common Stock (the number and type of shares into
which the Series A Preferred Stock shall be converted shall be adjusted as
described below) ("Conversion Shares"), without any payment of monies by the
holder of Series A Preferred Stock for such conversion. Upon a Liquidating
Event, the Conversion Rights shall terminate at the close of business on the
first (1st) full day preceding the date fixed for the payment of any amounts
distributable on liquidation to the holders of Series A Preferred Stock.

            (b) Automatic Conversion. Upon the sale of shares of Common Stock or
debt securities of the Corporation in a public offering (a "Qualified Public
Offering") pursuant to an effective registration statement under the Securities
Act of 1933, as amended, (i) resulting in at least $100,000,000 of net proceeds
to the Corporation or (ii) (A) resulting in more than $50,000,000 but less than
$100,000,000 in net proceeds to the Corporation and (B) the offering price for
Common Stock in such offering multiplied by the number of shares of Common Stock
represented by all the shares of the Series A Preferred Stock issued in exchange
for the DTI Series A Preferred Stock, is greater than the amount that would
provide an IRR (as hereinafter defined) of at least twenty-five percent (25%)
per annum on a cumulative basis, pre-tax ("Benchmark Amount") from the date of
the first Original Issue Date ("First Issue Date"), then all duly issued and
outstanding shares of the Series A Preferred Stock shall, as of the date of
consummation of such Public Offering, be converted into the Conversion Shares
(as in effect immediately prior to the date of consummation of such Public
Offering). "IRR" means the discount rate that equates (i) the present value (to
the First Issue Date) of the Benchmark Amount with (ii) the present value (to
the First Issue Date) of the total investments made by KLT on the Original Issue
Dates. For purposes of calculating IRR, any antecedent debt and all property
(including without limitation any antecedent debts or limited liability company
interests) shall be deemed to be contributed on the First Issue Date in cash at
its face value. The Corporation shall give the holders of the Series A Preferred
Stock notice of the filing with the Securities and Exchange Commission under the
Securities Act of 1933, as amended (the "Securities Act"), of any registration
statement relating to any proposed Public Offering not less than 30 days prior
to such filing. The holders of shares of Series A Preferred Stock shall present
such shares for surrender to the Corporation in accordance with the provisions
of subsection 4(d)(i) below on or before the closing date of such Public
Offering and the Corporation shall issue to such holders a certificate or
certificates for shares of Common Stock in accordance with the provisions of
subsection 4(d)(i) below on such closing date. The term "Qualified Public
Offering" shall be deemed to exclude any offering (i) pursuant to a registered
exchange offer for debt securities initially sold in a private placement
pursuant to Rule 144A and Regulation S under the Securities Act and (ii) to the
extent such offering registers securities for any party other than the
Corporation, including pursuant to demand registration rights or piggy-back
registration rights, on a shelf registration or otherwise.

            (c) Fractional Shares. No fractional shares of Common Stock shall be
issued upon conversion of the Series A Preferred Stock. In lieu of any
fractional shares to which the holder would otherwise be entitled, the
Corporation shall pay cash equal to such fraction multiplied 



                                       4
<PAGE>   5

by the fair market value of such fractional shares of Common Stock as determined
in good faith by the Corporation's Board of Directors, whose determination shall
be conclusive.

            (d) Mechanics of Conversion.

                (i) Surrender of Certificates. In order for a holder of Series A
Preferred Stock to convert shares of Series A Preferred Stock into shares of
Common Stock, such holder shall surrender the certificate or certificates for
such shares of Series A Preferred Stock, at the office of the transfer agent for
the Series A Preferred Stock (or at the principal office of the Corporation if
the Corporation serves as its own transfer agent), together with written notice
that such holder elects to convert all or any number of the shares of the Series
A Preferred Stock represented by such certificate or certificates without any
payment to the Corporation by the holder for such conversion. Such notice shall
state such holder's name or the names of the nominees in which such holder
wishes the certificate or certificates for shares of Common Stock to be issued.
If required by the Corporation, certificates surrendered for conversion shall be
endorsed or accompanied by a written instrument or instruments of transfer, in
form satisfactory to the Corporation, duly executed by the registered holder or
his, her or its attorney duly authorized in writing. The date of receipt of such
certificates and notice by the transfer agent (or by the Corporation if the
Corporation serves as its own transfer agent) shall be the conversion date
("Conversion Date"). The Corporation shall, as soon as practicable after the
Conversion Date, issue and deliver at such office to such holder of Series A
Preferred Stock, or to his, her or its nominees, a certificate or certificates
for the number of shares of Common Stock to which such holder shall be entitled,
together with cash in lieu of any fraction of a share.

                (ii) Reservation of Common Stock. The Corporation shall at all
times when the Series A Preferred Stock shall be outstanding, reserve and keep
available out of its authorized but unissued stock, for the purpose of effecting
the conversion of the Series A Preferred Stock, such number of its duly
authorized shares of Common Stock or other securities into which the Series A
Preferred Stock may then be convertible, as shall from time to time be
sufficient to effect the conversion of all outstanding Series A Preferred Stock.

                (iii) Unpaid Dividends. Upon any conversion, no adjustment to
the Conversion Shares shall be made for any accrued and unpaid dividends on the
Series A Preferred Stock surrendered for conversion or on the Common Stock
delivered upon conversion.

                (iv) No Rights. All shares of Series A Preferred Stock that have
been surrendered for conversion as herein provided or are subject to automatic
conversion under subsection 4(b), whether or not surrendered, shall no longer be
deemed to be outstanding and all rights with respect to such shares, including
the rights, if any, to receive notices and to vote, shall immediately cease and
terminate on the Conversion Date, except only the right of the holders thereof
to receive shares of Common Stock in exchange therefor and payment of any
accrued and unpaid dividends thereon.

            (e) Adjustments of Conversion Shares. In case the Corporation shall
hereafter (i) declare a dividend or a distribution on its Common 



                                       5
<PAGE>   6

Stock payable in shares of its Common Stock, (ii) subdivide its outstanding
shares of Common Stock, (iii) combine its outstanding Common Stock into a
smaller number of shares, or (iv) issue other securities of the Corporation by
reclassification of its Common Stock (including any such reclassification in
connection with a consolidation or merger in which the Corporation is the
continuing corporation), the number and kind of Conversion Shares at the time of
the record date for such dividend or distribution or the effective date of such
subdivision, combination or reclassification shall be proportionately adjusted
so that the owner of any Series A Preferred Stock converted after such date
shall be entitled to receive the number and kind of Conversion Shares which, if
such Series A Preferred Stock had been converted immediately prior to such time,
he would have owned upon such conversion and been entitled to receive upon such
dividend, distribution, subdivision, combination or reclassification. Such
adjustment shall be made successively whenever any event listed above shall
occur; appropriate adjustment (as determined in good faith by the Board of
Directors of the Corporation) shall be made to apply the provisions in this
Section 4 to any Conversion Shares which are not Common Stock in a manner as
similar as possible to that for the Common Stock.

            (f) Adjustment for Merger or Reorganization, Etc. In case of any
consolidation or merger of the Corporation with or into another corporation or
the sale of all or substantially all of the assets of the Corporation to another
corporation, each share of Series A Preferred Stock shall automatically convert
into the kind and amount of shares of stock or other securities or property to
which a holder of the number of shares of Common Stock of the Corporation
deliverable upon conversion of such Series A Preferred Stock would have been
entitled upon such consolidation, merger or sale; appropriate adjustment (as
determined in good faith by the Board of Directors of the Corporation) shall be
made to apply the provisions in this Section 4 to any Conversion Shares which
are not Common Stock in a manner as similar as possible to that for the Common
Stock.

            (g) No Impairment. The Corporation will not, by amendment of its
Articles of Incorporation or through any reorganization, transfer of assets,
consolidation, merger, dissolution, issue or sale of securities or any other
voluntary action, avoid or seek to avoid the observance or performance of any of
the terms to be observed or performed hereunder by the Corporation, but will at
all times in good faith assist in the carrying out of all the provisions of this
Section 4 and in the taking of all such action as may be necessary or
appropriate in order to protect the Conversion Rights of the holders of the
Series A Preferred Stock against impairment.

            (h) Notice of Record Date. In the event:

                (i) that the Corporation declares a dividend (or any other
         distribution) on its Common Stock payable in Common Stock or other
         securities of the Corporation;

                (ii) that the Corporation subdivides or combines its outstanding
         shares of Common Stock;

                (iii) of any reclassification of the Common Stock of the
         Corporation (other than a subdivision or combination of its outstanding
         shares of Common Stock or a stock dividend or stock distribution
         thereon), or of any consolidation or merger of the 


                                       6
<PAGE>   7

         Corporation into or with another corporation, or of the sale of all or
         substantially all of the assets of the Corporation; or

                (iv) of the involuntary or voluntary dissolution, liquidation or
         winding up of the Corporation,

then the Corporation shall cause to be filed at its principal office or at the
office of the transfer agent of the Series A Preferred Stock, and shall cause to
be mailed to the holders of the Series A Preferred Stock at their last addresses
as shown on the records of the Corporation or such transfer agent, at least 20
days prior to the record date specified below in subparagraph (A) or 20 days
before the date specified below in subparagraph (B), a notice stating:

                (A) the record date of such dividend, distribution, subdivision
         or combination, or, if a record is not to be taken, the date as of
         which the holders of Common Stock of record to be entitled to such
         dividend, distribution, subdivision or combination are to be
         determined; or

                (B) the date on which such reclassification, consolidation,
         merger, sale, dissolution, liquidation or winding up is expected to
         become effective, and the date as of which it is expected that holders
         of Common Stock of record shall be entitled to exchange their shares of
         Common Stock for securities or other property deliverable upon such
         reclassification, consolidation, merger, sale, dissolution or winding
         up.

            (i) Special Anti-Dilution. In the event that the number of
shares of Common Stock issuable upon exercise of the warrant issued by Digital
Teleport, Inc. ("DTI") to Banque IndoSuez would cause a dilution of the
ownership of outstanding Series A Preferred Stock to less than 49.74874% of the
total outstanding stock of the Corporation, assuming such warrant had been
exercised on the First Issue Date and all shares of DTI Series A Preferred Stock
had been issued at the First Issue Date, the Conversion Shares shall be
increased to a number which would equal the number of shares of capital stock of
the Corporation that would have constituted 49.74874% of the total outstanding
stock of DTI at the First Issue Date assuming such warrant had been exercised at
such time.

                                  ARTICLE FOUR

         The extent, if any, of the preemptive right of a shareholder to acquire
additional shares is hereby denied.

                                  ARTICLE FIVE

         The name and place of residence of the incorporator is as follows:

                           Richard D. Weinstein
                           14222 Kinderhook Drive
                           Chesterfield, MO  63017




                                       7
<PAGE>   8

                                   ARTICLE SIX

         The number of directors to constitute the Board of Directors is six.
Thereafter, the number of directors shall be fixed by, or in the manner provided
in, the Bylaws of the Corporation. Any changes in the number will be reported to
the Secretary of State within thirty calendar days of such change.

                                  ARTICLE SEVEN

         The duration of the corporation is Perpetual.

                                  ARTICLE EIGHT

The corporation is formed for the following purposes:

                  1. To operate a communications business, providing all other
                  related communications services as well as a general business.

                  2. To buy, sell, and deal generally at retail and wholesale of
                  merchandise and services.

                  3. To borrow money, lend money, invest money, and for such
                  purpose to execute notes, bonds, debentures, or any other form
                  of evidence of indebtedness, and to secure the payment of same
                  by mortgage, deed of trust, or other form of encumbrance,
                  pledge, or other form of hypothecation.

                  4. To take, purchase, or otherwise acquire, and to own and
                  hold such personal property, chattels real, rights, easements,
                  privileges, chose in action, notes, bonds, mortgages, and
                  securities as may be lawfully be acquired, held, or disposed
                  of by the Corporation under the laws of the State of Missouri.

                  5. To sell, assign, convey, exchange, release, and otherwise
                  deal in, and dispose of such real and personal property,
                  lands, buildings, chattels, chattels real, rights, easements,
                  privileges, chose in action, notes, bonds, mortgages, and
                  securities as may lawfully be acquired, held, or disposed of
                  by the Corporation under the laws of the State of Missouri.

                  6. To enter into and perform all manner and kinds of
                  contracts, agreements, and obligations of any lawful purposes,
                  by or with any person, firm, association, corporation, or
                  governmental division or subdivision.

                  7. To lend and advance money or to give credit to such persons
                  and on such terms as may seem expedient, and, in particular,
                  to customers and others dealing with it;


                                       8
<PAGE>   9


                  8. To guarantee or give security for the loans of its
                  customers and other dealing with it;

                  9. In general, to have and exercise any and all powers that
                  corporations have and may exercise under the laws of the State
                  of Missouri and as the same may be amended, except such powers
                  as are inconsistent with the express provisions of these
                  articles;

                  10. To do all and everything necessary, suitable, or proper
                  for the accomplishment of any of the purposes, the attainment
                  of any of the objects, or the exercise of any of the powers
                  herein set forth, either alone, or in conjunction with other
                  corporations, firms, individuals, and either as principals or
                  agents, and to do every other act or acts, thing or things,
                  incidental or appurtenant to, or growing out of, or connected
                  with the above mentioned objects, purposes or powers;

                  11. To have and to exercise all of the powers now or hereafter
                  conferred by the laws of the State of Missouri upon
                  corporations organized pursuant the laws under which the
                  Corporation is organized, and any and all acts amendatory
                  thereof and supplemental thereto;

                  12. The above enumerated powers shall not be construed as
                  limiting or restricting in any manner the powers of this
                  Corporation which shall always have such incidental powers as
                  may be connected with or related to any specific power herein
                  enumerated.

                                  ARTICLE NINE

         The Corporation shall not be subject to the provisions of Section
351.459 of The General and Business Corporation Law of Missouri.



                                       9
<PAGE>   10


         IN WITNESS WHEREOF, the undersigned, Richard D. Weinstein, President,
has executed this instrument and Richard D. Weinstein, its Secretary has
attested thereto on the 14th day of April, 1998.

                                           DTI HOLDINGS, INC.


                                           By:/s/  Richard D. Weinstein
                                              ----------------------------------
                                              Richard D. Weinstein, President


Attested:

/s/ Richard D. Weinstein
- -----------------------------------
Richard D. Weinstein, Secretary




STATE OF MISSOURI   )
                    )  SS
CITY OF ST. LOUIS   )

                  I, Connie B. Walsh, a Notary Public, do hereby certify that on
the 14th day of April, 1998, personally appeared before me Richard D. Weinstein,
and, being first duly sworn by me, acknowledged that he signed as his free act
and deed the foregoing document in the capacity(ies) therein set forth and
declared that the statements therein contained are true, to his knowledge and
belief.

                                                     /s/  Connie B. Walsh
                                                     ---------------------------
                                                     Notary Public


My Commission expires:


- ----------------------


                                      10

<PAGE>   1
                                                                    EXHIBIT 3.2



                                     BY-LAWS

                                       OF

                               DTI HOLDINGS, INC.
                           (adopted December 18, 1997)
              (restated, with all amendments, as of April 8, 1998)

                                    ARTICLE I

                                  Shareholders

                  Section 1.1. Annual Meetings. An annual meeting of
shareholders shall be held for the election of directors at such date, time and
place either within or without the State of Missouri as may be designated by the
Board of Directors from time to time. Any other proper business may be
transacted at the annual meeting.

                  Section 1.2. Special Meetings. Special meetings of
shareholders may be called at any time by the Chairman of the Board, if any, the
Vice Chairman of the Board, if any, the President or the Board of Directors, to
be held at such date, time and place either within or without the State of
Missouri as may be stated in the notice of the meeting.

                  Section 1.3. Notice of Meetings. Whenever shareholders are
required or permitted to take any action at a meeting, a written notice of the
meeting shall be given which shall state the place, date and hour of the
meeting, and, in the case of a special meeting, the purpose or purposes for
which the meeting is called. Unless otherwise provided by law, the written
notice of any meeting shall be given not less than ten nor more than sixty days
before the date of the meeting to each shareholder entitled to vote at such
meeting. If mailed, such notice shall be deemed to be given when deposited in
the United States mail, postage prepaid, directed to the shareholder at his
address as it appears on the records of the Corporation.

                  Section 1.4. Adjournments. Any meeting of shareholders, annual
or special, may adjourn from time to time to reconvene at the same or some other
place, and notice need not be given of any such adjourned meeting if the time
and place thereof are announced at the meeting at which the adjournment is
taken. At the adjourned meeting, the Corporation may transact any business which
might have been transacted at the original meeting. If the adjournment is for
more than thirty days, or if after the adjournment a new record date is fixed
for the adjourned meeting, a notice of the adjourned meeting shall be given to
each shareholder of record entitled to vote at the meeting.

                  Section 1.5. Quorum. At each meeting of shareholders, except
where otherwise provided by law or the articles of incorporation or these
by-laws, the holders


<PAGE>   2


of a majority of the outstanding shares of each class of stock entitled to vote
at the meeting, present in person or represented by proxy, shall constitute a
quorum. For purposes of the foregoing, two or more classes or series of stock
shall be considered a single class if the holders thereof are entitled to vote
together as a single class at the meeting. In the absence of a quorum, the
shareholders so present may, by majority vote, adjourn the meeting from time to
time in the manner provided by Section 1.4 of these by-laws until a quorum shall
attend. Shares of its own capital stock belonging on the record date for the
meeting to the Corporation or to another corporation, if a majority of the
shares entitled to vote in the election of directors of such other corporation
is held, directly or indirectly, by the Corporation, shall neither be entitled
to vote nor be counted for quorum purposes; provided, however, that the
foregoing shall not limit the right of the Corporation to vote stock, including
but not limited to its own stock, held by it in a fiduciary capacity.

                  Section 1.6. Organization. Meetings of shareholders shall be
presided over by the Chairman of the Board, if any, or in his absence by the
Vice Chairman of the Board, if any, or in his absence by the President, or in
his absence by a Vice President, or in the absence of the foregoing persons by a
chairman designated by the Board of Directors, or in the absence of such
designation by a chairman chosen at the meeting. The Secretary shall act as
secretary of the meeting, but in his absence the chairman of the meeting may
appoint any person to act as secretary of the meeting.

                  Section 1.7. Voting; Proxies. Except as otherwise provided by
the General and Business Corporation Law of Missouri or by the articles of
incorporation of the corporation or any amendments thereto, every shareholder
shall at every meeting of the shareholders be entitled to one vote in person or
by proxy for each share of the capital stock of the corporation held by such
shareholder entitled to vote thereon, except that no proxy shall be voted after
eleven months from its date unless otherwise provided in the proxy. All
cumulative voting rights of shareholders are hereby denied so that each holder
of the capital stock shall only be entitled to one vote per share of capital
stock in all elections of directors. Voting securities in any other corporation
held by the corporation shall be voted by the president, unless the Board of
directors specifically confers authority to vote with respect thereto, which may
be general or confined to specific instances, upon some other person or officer.
Any person authorized to vote securities shall have the power to appoint
proxies, with general power of substitution.

                  Section 1.8. Fixing Date for Determination of Shareholders of
Record. In order that the Corporation may determine the shareholders entitled to
notice of or to vote at any meeting of shareholders or any adjournment thereof,
or to express consent to corporate action in writing without a meeting, or
entitled to receive payment of any dividend or other distribution or allotment
of any rights, or entitled to exercise any rights in respect of any change,
conversion or exchange of stock or for the purpose of any other lawful action,
the Board of Directors may fix, in advance, a record date, which shall not be
more than sixty nor less than ten days before the date of such


<PAGE>   3


meeting, nor more than sixty days prior to any other action. If no record date
is fixed: (1) the record date for determining shareholders entitled to notice of
or to vote at a meeting of shareholders shall be at the close of business on the
day next preceding the day on which notice is given, or, if notice is waived, at
the close of business on the day next preceding the day on which the meeting is
held; (2) the record date for determining shareholders entitled to express
consent to corporate action in writing without a meeting, when no prior action
by the Board is necessary, shall be the day on which the first written consent
is expressed; and (3) the record date for determining shareholders for any other
purpose shall be at the close of business on the day on which the Board adopts
the resolution relating thereto. A determination of shareholders of record
entitled to notice of or to vote at a meeting of shareholders shall apply to any
adjournment of the meeting; provided, however, that the Board may fix a new
record date for the adjourned meeting.

                  Section 1.9. List of Shareholders Entitled to Vote. The
Secretary shall prepare and make, at least ten days before every meeting of
shareholders, a complete list of the shareholders entitled to vote at the
meeting, arranged in alphabetical order, and showing the address of each
shareholder and the number of shares registered in the name of each shareholder.
Such list shall be open to the examination of any shareholder, for any purpose
germane to the meeting, during ordinary business hours, for a period of at least
ten days prior to the meeting, either at a place within the city where the
meeting is to be held, which place shall be specified in the notice of the
meeting, or, if not so specified, at the place where the meeting is to be held.
The list shall also be produced and kept at the time and place of the meeting
during the whole time thereof and may be inspected by any shareholder who is
present.

                  Section 1.10. Consent of Shareholders in Lieu of Meeting.
Unless otherwise provided in the articles of incorporation, any action required
by law to be taken at any annual or special meeting of shareholders of the
Corporation, or any action which may be taken at any annual or special meeting
of such shareholders, may be taken without a meeting, without prior notice and
without a vote, if a consent in writing, setting forth the action so taken,
shall be signed by the holders of all outstanding stock.

                                   ARTICLE II

                               Board of Directors

                  Section 2.1. Powers; Number; Qualifications. The business and
affairs of the Corporation shall be managed by the Board of Directors, except as
may be otherwise provided by law or in the articles of incorporation. The number
of directors which shall constitute the Board of directors shall not be less
than three and shall be established from time to time by resolution of the
shareholders, provided, however, that any change in the number of directors
shall be reported to the Secretary of State of


<PAGE>   4


Missouri within thirty calendar days of such change. A director shall not be
required to be a resident of the State of Missouri nor a shareholder of the
corporation.

                  Section 2.2. Election; Term of Office; Resignation; Removal;
Vacancies. Each director shall hold office until the annual meeting of
shareholders next succeeding his election and until his successor is elected and
qualified or until his earlier resignation or removal. Any director may resign
at any time upon written notice to the Board of Directors or to the President or
the Secretary of the Corporation. Such resignation shall take effect at the time
specified therein, and unless otherwise specified therein no acceptance of such
resignation shall be necessary to make it effective.

                  Section 2.3. Regular Meetings. Regular meetings of the Board
of Directors will be held monthly on a regular fixed date at such places within
or without the State of Missouri as determined by the Board of Directors, and if
so determined, notice thereof need not be given.

                  Section 2.4. Special Meetings. Special meetings of the Board
of Directors may be held at any time or place within or without the State of
Missouri whenever called by the Chairman of the Board, if any, by the Vice
Chairman of the Board, if any, by the President or by any two directors.
Reasonable notice thereof shall be given by the person or persons calling the
meeting.

                  Section 2.5. Telephonic Meetings Permitted. Unless otherwise
restricted by the articles of incorporation or these by-laws, members of the
Board of Directors, or any committee designated by the Board, may participate in
a meeting of the Board or of such committee, as the case may be, by means of
conference telephone or similar communications equipment by means of which all
persons participating in the meeting can hear each other, and participation in a
meeting pursuant to this by-law shall constitute presence in person at such
meeting.

                  Section 2.6. Quorum; Vote Required for Action. At all meetings
of the Board of Directors all members of the entire Board present in person
shall constitute a quorum for the transaction of business. The vote of a
majority of the directors present at a meeting in person at which a quorum is
present shall be the act of the Board unless the articles of incorporation or
these by-laws shall require a vote of a greater number. In case at any meeting
of the Board a quorum shall not be present, the members of the Board present may
adjourn the meeting from time to time until a quorum shall attend.

                  Section 2.7. Organization. Meetings of the Board of Directors
shall be presided over by the Chairman of the Board, if any, or in his absence
by the Vice Chairman of the Board, if any, or in his absence by the President,
or in their absence by a chairman chosen at the meeting. The Secretary shall act
as secretary of the meeting, but in his absence the chairman of the meeting may
appoint any person to act as secretary of the meeting.





<PAGE>   5


                  Section 2.8. Informal Action by Directors. Any action required
or permitted to be taken at any meeting of the Board of directors, or of any
committee thereof, may be taken without a meeting if all members of the board or
committee, as the case may be, consent thereto in writing, and the writing or
writings are filed by the secretary with the minutes or proceedings of the board
of committee.

                                   ARTICLE III

                                   Committees

                  Section 3.1. Committees. The Board of Directors may, by
resolution passed by a majority of the whole Board, designate one or more
committees, each committee to consist of one or more of the Directors of the
Corporation. The Board may designate one or more Directors as alternate members
of any committee, who may replace any absent or disqualified member at any
meeting of the committee. In the absence or disqualification of a member of a
committee, the member or members thereof present at any meeting and not
disqualified from voting, whether or not he or they constitute a quorum, may
unanimously appoint another member of the Board to act at the meeting in place
of any such absent or disqualified member. Any such committee, to the extent
provided in the resolution of the Board, shall have and may exercise all the
powers and authority of the Board in the management of the business and affairs
of the Corporation, and may authorize the seal of the Corporation to be affixed
to all papers which may require it; but no such committee shall have power or
authority in reference to amending the articles of incorporation, adopting an
agreement of merger or consolidation, recommending to the shareholders the sale,
lease or exchange of all or substantially all of the Corporation's property and
assets, recommending to the shareholders a dissolution of the Corporation or a
revocation of dissolution, removing or indemnifying Directors or amending these
by-laws; and, unless the resolution expressly so provided, no such committee
shall have the power or authority to declare a dividend or to authorize the
issuance of stock.

                  Section 3.2. Compensation Committee. The compensation
committee shall consist of not fewer than two members of the board of Directors,
one selected by Richard D. Weinstein and one selected by KLT Telecom Inc., with
the board member selected by KLT Telecom Inc. to serve as the chairperson of
such committee. The compensation committee shall review and, as it deems
appropriate, recommend to the president and the board of Directors policies,
practices and procedures relating to the compensation of managerial employees
and the establishment and administration of employee benefit plans. The
compensation committee shall have and exercise all authority under any employee
stock option plans of the corporation as the committee therein (unless the board
of Directors by resolution appoints any other committee to exercise such
authority), and shall otherwise advise and consult with the officers of the
corporation as may be requested regarding managerial personnel policies. The
members of the compensation committee shall not be eligible to participate in
any


<PAGE>   6


discretionary employee benefit plan of the corporation including any stock
option plan which are administered by the compensation committee.

                  Section 3.3. Committee Rules. Unless the Board of Directors
otherwise provides, each committee designated by the Board may make, alter and
repeal rules for the conduct of its business. In the absence of a provision by
the Board or a provision in the rules of such committee to the contrary, a
majority of the entire authorized number of members of such committee shall
constitute a quorum for the transaction of business, the vote of a majority of
the members present at a meeting at the time of such vote if a quorum is then
present shall be the act of such committee, and in other respects each committee
shall conduct its business in the same manner as the Board conducts its business
pursuant to Article II of these by-laws.

                                   ARTICLE IV

                                    Officers

                  Section 4.1. Officers; Election; Qualification; Term of
Office; Resignation; Removal; Vacancies. As soon as practicable after the annual
meeting of shareholders in each year, the Board of Directors shall elect a
President and a Secretary, and it may, if it so determines, elect from among its
members a Chairman of the Board and a Vice Chairman of the Board. The Board may
also elect one or more Vice Presidents, one or more Assistant Vice Presidents,
one or more Assistant Secretaries, a Treasurer and one or more Assistant
Treasurers and may give any of them such further designations or alternate
titles as it considers desirable. Each such officer shall hold office until the
first meeting of the Board after the annual meeting of shareholders next
succeeding his election, and until his successor is elected and qualified or
until his earlier resignation or removal. Any officer may resign at any time
upon written notice to the Board or to the President or the Secretary of the
Corporation. Such resignation shall take effect at the time specified therein,
and unless otherwise specified therein no acceptance of such resignation shall
be necessary to make it effective. The Board may remove any officer with or
without cause at any time. Any such removal shall be without prejudice to the
contractual rights of such officer, if any, with the Corporation, but the
election or appointment of an officer shall not of itself create contractual
rights. Any number of offices may be held by the same person. Any vacancy
occurring in any office of the Corporation by death, resignation, removal or
otherwise may be filled for the unexpired portion of the term by the Board at
any regular or special meeting.

                  Section 4.2. Powers and Duties of Executive Officers. The
officers of the Corporation shall have such powers and duties in the management
of the Corporation as may be prescribed by the Board of Directors and, to the
extent not so provided, as generally pertain to their respective offices,
subject to the control of the Board. The Board may require any officer, agent or
employee to give security for the faithful performance of his duties.


<PAGE>   7




                                    ARTICLE V

                                      Stock

                  Section 5.1. Certificates. Every holder of stock in the
Corporation shall be entitled to have a certificate signed by or in the name of
the Corporation by the Chairman or Vice Chairman of the Board of Directors, if
any or the President or a Vice President, and by the Treasurer or an Assistant
Treasurer, or the Secretary or an Assistant Secretary, of the Corporation,
certifying the number of shares owned by him in the Corporation. If such
certificate is manually signed by one officer or manually countersigned by a
transfer agent or by a registrar, any other signature on the certificate may be
a facsimile. In case any officer, transfer agent or registrar who has signed or
whose facsimile signature has been placed upon a certificate shall have ceased
to be such officer, transfer agent or registrar before such certificate is
issued, it may be issued by the Corporation with the same effect as if he were
such officer, transfer agent or registrar at the date of issue.

                  Section 5.2. Lost, Stolen or Destroyed Stock Certificates;
Issuance of New Certificates. The Corporation may issue a new certificate of
stock in the place of any certificate theretofore issued by it, alleged to have
been lost, stolen or destroyed, and the Corporation may require the owner of the
lost, stolen or destroyed certificate, or his legal representative, to give the
Corporation a bond sufficient to indemnify it against any claim that may be made
against it on account of the alleged loss, theft or destruction of any such
certificate or the issuance of such new certificate.

                                   ARTICLE VI

                                  Miscellaneous

                  Section 6.1. By-Laws Subject to Shareholders' Agreement. At
any time that the Corporation is bound by the Shareholders' Agreement, dated as
of March 12, 1997, by and among the Corporation (as successor-in-interest to
Digital Teleport, Inc.) and certain shareholders named therein, as the same may
be modified or amended from time to time (the "Shareholders' Agreement"), then,
whether or not expressly so stated in these by-laws or such Shareholders'
Agreement, any term or provision of these by-laws that is modified or superseded
by any term or provision of such Shareholders' Agreement shall not be deemed
contained in these by-laws except as so modified or superseded, and any term or
provision of such Shareholders' Agreement that is contrary to or inconsistent
with any term or provision of these by-laws shall, notwithstanding these
by-laws, govern and control the matter subject thereto.

                  Section 6.2. Fiscal Year. The fiscal year of the Corporation
shall be determined by the Board of Directors.


<PAGE>   8



                  Section 6.3. Seal. The Corporation may have a corporate seal
which shall have the name of the Corporation inscribed thereon and shall be in
such form as may be approved from time to time by the Board of Directors. The
corporate seal may be used by causing it or a facsimile thereof to be impressed
or affixed or in any other manner reproduced.

                  Section 6.4. Waiver of Notice of Meetings of Shareholders,
Directors and Committees. Whenever notice is required to be given by law or
under any provision of the certificate of incorporation or these by-laws, a
written waiver thereof, signed by the person entitled to notice, whether before
or after the time stated therein, shall be deemed equivalent to notice.
Attendance of a person at a meeting shall constitute a waiver of notice of such
meeting, except when the person attends a meeting for the express purpose of
objecting, at the beginning of the meeting, to the transaction of any business
because the meeting is not lawfully called or convened. Neither the business to
be transacted at, nor the purpose of, any regular or special meeting of the
shareholders, directors, or members of a committee of directors need be
specified in any written waiver of notice unless so required by the articles of
incorporation or these by-laws.

                  Section 6.5. Indemnification of Directors, Officers and
Employees. The Corporation shall indemnify to the full extent authorized by law
any person made or threatened to be made a party to any action, suit or
proceeding, whether criminal, civil, administrative or investigative, by reason
of the fact that he, his testator or intestate is or was a director or officer
of the Corporation or any predecessor of the Corporation or serves or served any
other enterprise as a director, officer or employee at the request of the
Corporation or any predecessor of the Corporation. The Corporation may, in the
sole discretion of the Board of Directors, indemnify to the full extent
authorized by law any person made or threatened to be made a party to any
action, suit or proceeding, whether criminal, civil, administrative or
investigative, by reason of the fact that he, his testator or intestate is or
was an employee of the Corporation or any predecessor of the Corporation.

                  Section 6.6. Interested Directors; Quorum. No contract or
transaction between the Corporation and one or more of its directors or
officers, or between the Corporation and any other corporation, partnership,
association or other organization in which one or more of its directors or
officers are directors or officers, or have a financial interest, shall be void
or voidable solely for this reason, or solely because the director or officer is
present at or participates in the meeting of the Board of Directors or committee
thereof which authorizes the contract or transaction, or solely because his or
their votes are counted for such purpose, if: (1) the material facts as to his
relationship or interest and as to the contract or transaction are disclosed or
are known to the Board or the committee, and the Board or committee in good
faith authorizes the contract or transaction by the affirmative votes of a
majority of the disinterested directors, even though the disinterested directors
be less than a quorum; or (2) the


<PAGE>   9


material facts as to his relationship or interest and as to the contract or
transaction are disclosed or are known to the shareholders entitled to vote
thereon, and the contract or transaction is specifically approved in good faith
by majority vote of the shareholders; or (3) the contract or transaction is fair
as to the Corporation as of the time it is authorized, approved or ratified, by
the Board, a committee thereof or the shareholders. Common or interested
directors may be counted in determining the presence of a quorum at a meeting of
the Board or of a committee which authorizes the contract or transaction.

                  Section 6.7. Form of Records. Any records maintained by the
Corporation in the regular course of its business, including its stock ledger,
books of account and minute books, may be kept on, or be in the form of, punch
cards, magnetic tape, photographs, microphotographs or any other information
storage device, provided that the records so kept can be converted into clearly
legible form within a reasonable time. The Corporation shall so convert any
records so kept upon the request of any person entitled to inspect the same.

                  Section 6.8.  [Reserved]



<PAGE>   1
                                                                   EXHIBIT 5.1



                         [Letterhead of Bryan Cave LLP]



                                                        July 13, 1998


Board of Directors
DTI Holdings, Inc.
11111 Dorsett Road
St. Louis, Missouri  63043

Gentlemen:

                  We are acting as special counsel for DTI Holdings, Inc., a
Missouri corporation (the "Company"), in connection with various legal matters
relating to the filing with the Securities and Exchange Commission of a
Registration Statement on Form S-4 (the "Registration Statement") under the
Securities Act of 1933, as amended (the "Act"), covering an offer to exchange
(the "Exchange Offer") $1,000 principal amount of the Company's 12 1/2% Series B
Senior Discount Notes due 2008 (the "Exchange Notes") for each $1,000 principal
amount of its outstanding 12 1/2% Senior Discount Notes due 2008 (the "Private
Notes"), of which $506,000,000 aggregate principal amount is outstanding on the
date hereof. The Exchange Notes are to be issued pursuant to an Indenture, dated
as of February 23, 1998 (the "Indenture"), between the Company and The Bank of
New York, as Trustee, which is filed as an exhibit to the Registration
Statement.

                  In connection herewith, we have examined and relied without
independent investigation as to matters of fact upon such certificates of public
officials, such statements and certificates of officers of the Company and
originals or copies certified to our satisfaction of the Registration Statement,
the Indenture, the Notes Registration Rights Agreement, dated as of February 23,
1998, between the Company and the Initial Purchasers named therein, the Restated
Articles of Incorporation and By-laws of the Company, proceedings of the Board
of Directors of the Company and such other corporate records, documents,
certificates and instruments as we have deemed necessary or appropriate in order
to enable us to render the opinions expressed below. In rendering this opinion,
we have assumed the genuineness of all signatures on all documents examined by
us, the legal capacity of all natural persons, the authenticity of all documents
submitted to us as originals and the conformity to authentic originals of all
documents submitted to us as certified or photostatted copies.

                  We express no opinion as to the applicability or effect of (i)
any bankruptcy, insolvency, reorganization, moratorium and other similar laws
relating to or affecting creditors' rights generally, or (ii) general principles
of equity, including, without limitation, concepts of reasonableness,
materiality, good faith and fair dealing and the possible unavailability of
specific performance, injunctive relief or other equitable remedies, regardless
of whether enforceability is considered in a proceeding in equity or at law.

                  Based upon the foregoing and in reliance thereon and subject
to the qualifications and limitations stated herein, we are of the opinion that:

         (1)      The Company is a corporation validly existing in good standing
                  under the laws of 


<PAGE>   2
                               BRYAN CAVE LLP



DTI Holdings, Inc.
July 13, 1998
Page 2

                  the State of Missouri;

         (2)      When,

                    (i)    the Registration Statement,  including any amendments
                           thereto, shall have become effective under the Act;

                   (ii)    the Indenture has been duly qualified under the Trust
                           Indenture Act of 1939, as amended; and

                  (iii)    the Exchange  Notes shall have been duly executed and
                           authenticated  in accordance  with the  provisions of
                           the  Indenture  and  duly  delivered  to the  holders
                           thereof in exchange for the Private Notes;

                  then the Exchange Notes will be valid and binding obligations
                  of the Company; and

         (3)      The statements  contained in the Preliminary  Prospectus dated
                  July 13, 1998  under  the  caption  "Certain  United  States
                  Federal Income Tax Considerations"  insofar as such statements
                  constitute matters of law or legal  conclusions,  as qualified
                  therein,  fairly  describe  the  material  federal  income tax
                  consequences  of the Exchange Offer and are true,  correct and
                  complete in all material respects.

                  In rendering the opinion expressed in clause (3) above, we
have considered the applicable provisions of the Internal Revenue Code, as
amended (the "Code"), Treasury Regulations promulgated thereunder by the
Treasury Department (the "Regulations"), pertinent judicial authorities, rulings
of the Internal Revenue Service and such other authorities as we have considered
relevant. It should be noted that such laws, Code, Regulations, judicial
decisions and administrative interpretations are subject to change at any time
and, in some circumstances, with retroactive effect. We have also assumed that
the Registration Statement reflects all of the material facts, and our opinion
is expressly conditioned on, among other things, the accuracy as of the date
hereof, and the continuing accuracy, of all such facts, information, covenants,
statements and representations through and as of the effective date of the
Exchange Offer. Any variation or difference in the facts referred to, set forth
or assumed herein or in the Registration Statement or in any of the authorities
upon which our opinion is based could affect our opinion.

                  This opinion is not rendered with respect to any laws other
than the laws of the State of New York, the General and Business Corporation Law
of Missouri and the federal laws of the United States.

                  We hereby consent to the filing of this opinion as an exhibit
to the Registration Statement and to the reference to our firm under the caption
"Legal Matters" in the Prospectus included as a part thereof. We also consent to
your filing copies of this opinion as an exhibit to the Registration Statement
with agencies of such states as you deem necessary in the course of complying
with the laws of such states regarding the Exchange Offer. In giving this
consent, we do not admit that we are in the category of persons whose consent is
required under Section 7 of 


<PAGE>   3
                                BRYAN CAVE LLP



DTI Holdings, Inc.
July 13, 1998
Page 3


the Act or the rules and regulations of the Securities and Exchange Commission 
thereunder.


                                                     Very truly yours,


                                                     /s/ Bryan Cave LLP
                                                     Bryan Cave LLP




<PAGE>   1
                                                                 EXHIBIT 10.19


                                      INDEX


SWBT/Digital Teleport, Inc. (Missouri)                                 Tab 1
         800                                                           Tab 2
         911 - Missouri                                                Tab 3
         AIN                                                           Tab 4
         BCR                                                           Tab 5
         CH                                                            Tab 6
         CNAM                                                          Tab 7
         DCO                                                           Tab 8
         DA                                                            Tab 9
         FGA                                                           Tab 10
         HOST                                                          Tab 11
         ITR                                                           Tab 12
         LIDB-AS                                                       Tab 13
         LIDB-V                                                        Tab 14
         OSS                                                           Tab 15
         OS                                                            Tab 16
         NIM/Physical Collocation Agreement                            Tab 17
         SS7                                                           Tab 18
         RECORDING                                                     Tab 19
         RESALE                                                        Tab 20
         UNE                                                           Tab 21
         WIRELESS                                                      Tab 22
         WP                                                            Tab 23
         TP                                                            Tab 24
         PORT                                                          Tab 25
         Poles, Ducts, Conduits & ROW                                  Tab 26
                                                                       



<PAGE>   2
                                                    GENERAL TERMS AND CONDITIONS
                                                                  DTI - MISSOURI



             INTERCONNECTION AGREEMENT UNDER SECTIONS 251 AND 252 OF
                       THE TELECOMMUNICATIONS ACT OF 1996




                                 BY AND BETWEEN


                       SOUTHWESTERN BELL TELEPHONE COMPANY


                                       AND


                             DIGITAL TELEPORT, INC.

<PAGE>   3
                                                    GENERAL TERMS AND CONDITIONS
                                                                  DTI - MISSOURI
                                                                     PAGE 1 OF 3

                                TABLE OF CONTENTS

<TABLE>
<S>     <C>                                                                                                              <C>
1.0      DEFINITIONS..................................................................................................... 1

2.0      INTERPRETATION AND CONSTRUCTION................................................................................. 5

3.0      IMPLEMENTATION SCHEDULE AND INTERCONNECTION ACTIVATION DATES.................................................... 5

4.0      INTERCONNECTION PURSUANT TO SECTION 251(c)(2)................................................................... 6
         4.1      Scope.................................................................................................. 6
         4.2      Interconnection Coverage............................................................................... 6
         4.3      Methods for Interconnection............................................................................ 7
         4.4      Physical Architecture.................................................................................. 8
         4.5      Technical Specifications............................................................................... 9
         4.6      Interconnection in Additional Metropolitan Exchange Areas.............................................. 9

5.0      TRANSMISSION AND ROUTING OF TELEPHONE EXCHANGE SERVICE TRAFFIC  PURSUANT TO SECTION 251(c)(2)................... 10
         5.1      Scope of Traffic....................................................................................... 10
         5.2      Responsibilities of the Parties........................................................................ 10
         5.3      Reciprocal Compensation for Termination of Local Traffic............................................... 11
         5.4      Reciprocal Compensation for Transit Traffic............................................................ 12
         5.5      Reciprocal Compensation for Termination of IntraLATA Interexchange Traffic............................. 13
         5.6      Compensation for Origination and Termination of Switched Access Service Traffic
                  to or From an IXC (Meet-Point Billing (MPB) Arrangements).............................................. 13
         5.7      Billing Arrangements for Compensation for Termination of IntraLATA, Local, Transit, and Optional
                  Calling Area Traffic................................................................................... 15
         5.8      Compensation for "Porting" Optional Calling Area Numbers............................................... 16

6.0      TRANSMISSION AND ROUTING OF EXCHANGE ACCESS TRAFFIC PURSUANT
         TO 251(c)(2).................................................................................................... 16
         6.1      Scope of Traffic....................................................................................... 16
         6.2      Trunk Group Architecture Traffic Routing............................................................... 16

7.0      TRANSPORT AND TERMINATION OF OTHER TYPES OF TRAFFIC............................................................. 17
         7.1      Information Services Traffic........................................................................... 17
         7.2      Line Status Verification (LSV)/Busy Line Interrupt (BLI) Traffic....................................... 17
         7.3      Wireless Traffic....................................................................................... 17

8.0      SIGNALING....................................................................................................... 18

9.0      NUMBERING....................................................................................................... 18

10.0     RESALE--SECTIONS  251(b)(1); 251(c)(4); 252(d)(3); and 271(c)(2)(B)(xiv)........................................ 19
</TABLE>

<PAGE>   4
                                                    GENERAL TERMS AND CONDITIONS
                                                                  DTI - MISSOURI
                                                                     PAGE 2 OF 3


<TABLE>
<S>      <C>                                                                                                             <C>
11.0     UNBUNDLED NETWORK ELEMENTS - SECTIONS 251(c)(3), 271(c)(2)(B) (ii),(iv),(v),(vi),(x)........................... 20

12.0     NOTICE OF CHANGES -- SECTION 251(c)(5)......................................................................... 20

13.0     COLLOCATION -- SECTION 251(c)(6)............................................................................... 20

14.0     NUMBER PORTABILITY -- SECTIONS 251(b)(2) and 271(c)(2)(B)(xi).................................................. 21

15.0     DIALING PARITY -- SECTION 251(b)(3); 271(c)(2)(B)(xii); and 271(e)(2).......................................... 21

16.0     ACCESS TO RIGHTS-OF-WAY -- SECTION 251(b)(4) and 271(c)(2)(B)(iii)............................................. 21

17.0     DATABASE ACCESS -- SECTION  271(c)(2)(B)(x).................................................................... 21

18.0     INTERCEPT REFERRAL ANNOUNCEMENTS............................................................................... 22

19.0     COORDINATED REPAIR CALLS....................................................................................... 22

20.0     OTHER SERVICES 271(c)(B)(2)(vii) and 271(c)(2)(B)(viii).........................................................22
         20.1     White Pages........................................................................................... 22
         20.2     Calling Name Information.............................................................................. 23
         20.3     Billing/Collecting/Remitting  ........................................................................ 23
         20.4     911/E911 Service  .................................................................................... 23
         20.5     Directory Assistance (DA)............................................................................. 23
         20.6     Operator Services..................................................................................... 23
         20.7     Clearinghouse Services ............................................................................... 23
         20.8     Hosting..............................................................................................  23
         20.9     Signaling System 7 Interconnection.................................................................... 23

21.0     GENERAL RESPONSIBILITIES OF THE PARTIES........................................................................ 23

22.0     EFFECTIVE DATE, TERM, AND TERMINATION.......................................................................... 25

23.0     DISCLAIMER OF REPRESENTATIONS AND WARRANTIES................................................................... 26

24.0     CHANGES IN END USER LOCAL EXCHANGE SERVICE PROVIDER SELECTION.................................................. 26

25.0     SEVERABILITY................................................................................................... 27

26.0     INTELLECTUAL PROPERTY.......................................................................................... 27

27.0     INDEMNIFICATION................................................................................................ 27
</TABLE>


<PAGE>   5
                                                    GENERAL TERMS AND CONDITIONS
                                                                  DTI - MISSOURI
                                                                     PAGE 3 OF 3


<TABLE>
<S>      <C>                                                                                                            <C>
28.0     LIMITATION OF LIABILITY........................................................................................ 28

29.0     LIQUIDATED DAMAGES FOR SPECIFIED ACTIVITIES.................................................................... 29
         29.1     Certain Definitions................................................................................... 29
         29.2     Specified Performance Breach.......................................................................... 30
         29.3     Liquidated Damages.................................................................................... 30
         29.4     Limitations........................................................................................... 31
         29.5     Sole Remedy........................................................................................... 31
         29.6     Records............................................................................................... 31

30.0     REGULATORY APPROVAL............................................................................................ 31

31.0     MISCELLANEOUS.................................................................................................. 32
         31.1     Authorization......................................................................................... 32
         31.2     Compliance and Certification.......................................................................... 32
         31.3     Law Enforcement....................................................................................... 32
         31.4     Independent Contractor................................................................................ 33
         31.5     Force Majeure......................................................................................... 33
         31.6     Confidentiality....................................................................................... 34
         31.7     Governing Law......................................................................................... 35
         31.8     Taxes................................................................................................. 36
         31.9     Non-Assignment........................................................................................ 37
         31.10    Non-Waiver............................................................................................ 37
         31.11    Audits................................................................................................ 37
         31.12    Disputed Amounts...................................................................................... 38
         31.13    Disputed Resolutions.................................................................................. 38
         31.14    Notices............................................................................................... 39
         31.15    Publicity and Use of Trademarks or Service Marks...................................................... 39
         31.16    Section 252(i) Obligations............................................................................ 40
         31.17    Joint Work Product.................................................................................... 40
         31.18    Intervening Law....................................................................................... 40
         31.19    No Third Party Beneficiaries; Disclaimer of Agency.................................................... 41
         31.20    No License............................................................................................ 41
         31.21    Survival.............................................................................................. 41
         31.23    Scope of Agreement.................................................................................... 41
         31.24    Entire Agreement...................................................................................... 41
</TABLE>

<PAGE>   6
                                                    GENERAL TERMS AND CONDITIONS
                                                                  DTI - MISSOURI
                                                                    PAGE 1 OF 42

         INTERCONNECTION AGREEMENT UNDER SECTIONS 251 AND 252 OF THE
                       TELECOMMUNICATIONS ACT OF 1996

     This Interconnection Agreement under Sections 251 and 252 of the
Telecommunications Act of 1996 ("Agreement"), is by and between Southwestern
Bell Telephone Company, a Missouri Corporation ("SWBT"), and Digital Teleport,
Inc. ("DTI").

     WHEREAS, the Parties want to interconnect their networks at mutually
agreed upon points of interconnection to provide, directly or indirectly,
Telephone Exchange Services and Exchange Access to residential and business end
users predominantly over their respective telephone exchange service facilities
in Missouri; and

     WHEREAS, the Parties are entering into this Agreement to set forth the
respective obligations of the Parties and the terms and conditions under which
the Parties will interconnect their networks and provide other services as
required by the Telecommunications Act of 1996 ("the Act") and additional
services as set forth herein; and

     WHEREAS, for purposes of this Agreement, the Parties intend to operate
where SWBT is the incumbent local exchange carrier and DTI, a competitive local
exchange carrier, is certified by the Missouri Public Service Commission, as
required.

     NOW, THEREFORE, DTI and SWBT hereby agree as follows:

1.0  DEFINITIONS


     1.1 "Act" means the Communications Act of 1934 [47 U.S.C. 153(R)], as
amended by the Telecommunications Act of 1996.

     1.2 "Affiliate" is as defined in the Act.

     1.3 "Automatic Number Identification" or "ANI" is a switching system 
feature that forwards the telephone number of the calling party and is used for
screening, routing and billing purposes.

     1.4 "Busy Line Interrupt" or "BLI" is performed when one Party's operator
bureau interrupts a telephone number in progress after Line Status Verification
has occurred.  The operator bureau will interrupt the busy line and inform the
called party that there is a call waiting.

     1.5 "Calling Party Number" or "CPN" is a feature of signaling system 7
(SS7) protocol whereby the ten (10) digit number of the calling party is
forwarded from the end office.

     1.6 "Central Office Switch" means a single switching system within the
public switched telecommunications network, including the following:

<PAGE>   7
                                                    GENERAL TERMS AND CONDITIONS
                                                                  DTI - MISSOURI
                                                                    PAGE 2 OF 42

                        
            (i)  "End Office Switches" which
                 are Class 5 switches where end user
                 Exchange Services are directly connected
                 and offered; and

            (ii) "Tandem Office Switches" or
                 "Tandems" which are Class 4 switches used
                 to connect and switch trunk circuits
                 between Central Office Switches.

Central Office Switches may be employed as combination End Office/Tandem Office
switches (combination Class 5/Class 4).

     1.7 "CLASS Features" mean certain CCS-based features available to end
users including, but not limited to: Automatic Call Back; Call Trace; Caller
Identification and related blocking features; Distinctive Ringing/Call Waiting;
Selective Call Forward; and Selective Call Rejection.

     1.8 "Collocation" means an arrangement whereby one Party's (the
"Collocating Party") facilities are terminated in its equipment necessary for
Interconnection or for access to Network Elements on an unbundled basis which
has been installed and maintained at the premises of a second Party (the
"Housing Party").  Collocation may be "physical" or "virtual." In "Physical
Collocation," the Collocating Party installs and maintains its own equipment in
the Housing Party's premises.  In "Virtual Collocation," the Housing Party
installs and maintains the collocated equipment in the Housing Party's
premises.  Collocation includes, but is not limited to, collocation of 38 GHz
basic transmission equipment, provided it complies with the guidelines in
SWBT's current Physical Collocation 02/14/97 Technical Publication provided to
DTI.

     1.9 "Commission" or PSC means the Missouri Public Service Commission.

     1.10 "Common Channel Signaling" or "CCS" is a special network, fully
separate from the transmission path of the public switched network, that
digitally transmits call set-up and network control data.  Unless otherwise
agreed by the Parties, the CCS used by the Parties shall be SS7.

     1.11 "Cross Connect" means the unbundled network element cross connect
rate element which is used to designate connection between: i) the SWBT
distribution frame and an unbundled network element component, or ii) two
unbundled network element components, or iii) the SWBT distribution frame and
the tie cable termination point for DTI collocation.

     1.12 "Dialing Parity" is as defined in the Act.  As used in this
Agreement, Dialing Parity refers to both Local Dialing Parity and Toll Dialing
Parity.

     1.13 "Digital Signal Level" means one of several transmission rates in the
time-division multiplex hierarchy.

<PAGE>   8

                                                    GENERAL TERMS AND CONDITIONS
                                                                  DTI - MISSOURI
                                                                    PAGE 3 OF 42

     1.14 "Digital Signal Level 0" or "DS0" means the 64 Kbps zero-level signal
in the time-division multiplex hierarchy.

     1.15 "Digital Signal Level 1" or "DS1" means the 1.544 Mbps first-level
signal in the time-division multiplex hierarchy.  In the time-division
multiplexing hierarchy of the telephone network, DS1 is the initial level of
multiplexing.

     1.16 "Digital Signal Level 3" or "DS3" means the 44.736 Mbps third-level
in the time-division multiplex hierarchy.  In the time-division multiplexing
hierarchy of the telephone network, DS3 is defined as the third level of
multiplexing.

     1.17 "End User" means a third-party residence or business, that subscribes
to Telecommunications Services provided by either of the Parties, or by another
telecommunications service provider.

     1.18 "Exchange Access" is as defined in the Act.

     1.19 "Exchange Message Record" or "EMR" means the standard used for
exchange of Telecommunications message information among Telecommunications
Carriers for billable, non-billable, sample, settlement and study data.  EMR
format is contained in Bellcore Practice BR-010-200-010 CRIS Exchange Message
Record.

     1.20 "Fiber-Meet" means an Interconnection architecture method whereby the
Parties physically interconnect their networks via an optical fiber interface
(as opposed to an electrical interface) at a mutually agreed upon location.

     1.21 "Interconnection" is as Described in the Act and refers to the
connection of separate pieces of equipment, facilities, or platforms between or
within networks for the purpose of transmission and routing of Telephone
Exchange Service traffic and Exchange Access traffic.

     1.22 "Interconnection Activation Date" is the date that the construction
of the joint facility Interconnection arrangement has been completed, trunk
groups have been established, and joint trunk testing is completed.

     1.23 "Interexchange Carrier" or "IXC" means a carrier that provides,
directly or indirectly, interLATA or intraLATA Telephone Toll Services.  For
purposes of Section 6.0 of this Agreement, the term "IXC" includes any entity
which purchases FGB or FGD Switched Exchange Access Service in order to
originate or terminate traffic to/from DTI's end users.

     1.24 "IntraLATA Toll Traffic" means those intraLATA station calls that are
not defined as Local Traffic in this Agreement.

<PAGE>   9

                                                    GENERAL TERMS AND CONDITIONS
                                                                  DTI - MISSOURI
                                                                    PAGE 4 OF 42

     1.25 "Line Status Verification" or "LSV" or "Busy Line Verify" or "BLV" is
performed when one Party's end user requests assistance from the operator
bureau to determine if the called line of the other Party is in use.

     1.26 "Local Traffic," for purposes of intercompany compensation, is if (i)
the call originates and terminates in the same SWBT exchange area; or (ii)
originates and terminates within different SWBT Exchanges that share a common
mandatory local calling area, e.g., mandatory Extended Area Service (EAS),
mandatory Extended Local Calling Service (ELCS), or other like types of
mandatory expanded local calling scopes.

     1.27 "Losses" means any and all losses, costs (including court costs),
claims, damages (including fines, penalties, and criminal or civil judgments
and settlements), injuries, liabilities and expenses (including attorneys'
fees).

     1.28 "MECAB" refers to the Multiple Exchange Carrier Access Billing
(MECAB) document prepared by the Billing Committee of the Ordering and Billing
Forum (OBF), which functions under the auspices of the Carrier Liaison
Committee (CLC) of the Alliance for Telecommunications Industry Solutions
(ATIS).  The MECAB document, published by Bellcore as Special Report
SR-BDS-000983, contains the recommended guidelines for the billing of access
services provided to an IXC by two or more LECs, or by one LEC in two or more
states within a single LATA.  The latest release is issue No. 5, dated June
1994.

     1.29 "MECOD" refers to the Multiple Exchange Carriers Ordering and Design
(MECOD) Guidelines for Access Services - Industry Support Interface, a document
developed by the Ordering/Provisioning Committee of the Ordering and Billing
Forum (OBF), which functions under the auspices of the Carrier Liaison
Committee (CLC) of the Alliance for Telecommunications Industry" Solutions
(ATIS).  The MECOD document, published by Bellcore as Special Report SR
STS-002643, establishes methods for processing orders for access service which
is to be provided to an IXC by two or more telecommunications providers.  The
latest release is issue No. 3, dated February 1996.

     1.30 "Meet-Point Billing" or "MPB" refers to a billing arrangement whereby
two or more Telecommunications Carriers jointly provide for switched access
service to an IXC, with each LEC receiving an appropriate share of its switched
access revenues as defined by its effective access tariffs.

     1.31 "Metropolitan Exchange Area" means a geographical area defined in
SWBT current tariffs effective as a metropolitan exchange local calling area.
For example, Dallas, Ft. Worth, Houston, Little Rock, Oklahoma City, St. Louis,
Austin and would be examples of Metropolitan Exchange Areas.

     1.32 "Network Element Bona Fide Request" means the process described [in
Appendix BFR that is attached hereto and incorporated herein] that prescribes
the terms and conditions relating to a Party's request that the other Party
provide a Network Element.


<PAGE>   10

                                                    GENERAL TERMS AND CONDITIONS
                                                                  DTI - MISSOURI
                                                                    PAGE 5 OF 42

     1.33 "Switched Exchange Access Service" means the offering of transmission
or switching services to Telecommunications Carriers for the purpose of the
origination or termination of Telephone Toll Service.  Switched Exchange Access
Services include, but are not necessarily limited to: Feature Group A, Feature
Group B, Feature Group D, 800/888 access, and 900 access and their successors
or similar Switched Exchange Access services.

     1.34 "Telephone Exchange Services"

     1.35 "Synchronous Optical Network" or "SONET" means an optical interface
standard that allows inter-networking of transmission products from multiple
vendors.  The base rate is 51.84 Mbps (OC-l/STS-l) and higher rates are direct
multiples of the base rate, up to 13.22 Gpbs.

     1.36 "Telephone Exchange Service" is as defined in the Act.

     1.37 "Wire Center" means an occupied structure or portion thereof in which
a Party has the exclusive right of occupancy and which serves as a Routing
Point for Switched Exchange Access Service.

2.0 INTERPRETATION AND CONSTRUCTION

     In the event of any amendment of the Act or any legislative, regulatory,
judicial order, rule or regulations, or other legal action that revises or
reverses the Act, the FCC's Orders in FCC Docket Nos. 96-98 and 95-185 or any
applicable order or arbitration award purporting to apply the provisions of the
federal Act, the Parties reserve all of their rights and remedies, including
those to amend, alter, or revise this Agreement.

3.0  IMPLEMENTATION SCHEDULE AND INTERCONNECTION ACTIVATION DATES

     Subject to the terms and conditions of this Agreement, Interconnection of
the Parties' facilities and equipment pursuant to Sections 4.0, 5.0 and 6.0 for
the transmission and routing of Telephone Exchange Service traffic and Exchange
Access traffic shall be established on or before the corresponding
"Interconnection Activation Date" shown for each such Metropolitan Exchange
Area on Appendix DCO attached hereto and incorporated by reference.  Appendix
DCO may be revised and supplemented from time to time upon the mutual agreement
of the Parties to reflect the Interconnection of additional Metropolitan
Exchange Areas pursuant to Section 4.6 by modifying or updating Appendix DCO.

<PAGE>   11
                                                    GENERAL TERMS AND CONDITIONS
                                                                  DTI - MISSOURI
                                                                    PAGE 6 OF 42


4.0 INTERCONNECTION PURSUANT TO SECTION 251(c)(2)

     4.1 SCOPE

     This Section 4.0 describes the physical architecture for Interconnection
of the Parties' facilities and equipment for the transmission and routing of
Telephone Exchange Service traffic and Exchange Access traffic pursuant to
Section 251(c)(2) of the Act.  Such Interconnections shall be equal in quality
to that provided by the Parties to themselves or to any subsidiary, affiliate
or Third Party.  Appendix ITR attached hereto and incorporated by reference
prescribes the specific trunk groups (and traffic routing parameters) which
will be configured over the physical connections described in this Section 4.0
to provide the facilities for the transmission and routing of Telephone
Exchange Service traffic (as described in Section 5.0), Exchange Access traffic
(as described in Section 6.0), LSV/BLI traffic (as described in sub-section
7.2).

     4.2 INTERCONNECTION COVERAGE

     The Parties shall provide for interoperation of their networks and shall
interconnect their facilities as stated below:

           4.2.1. DTI shall interconnect with SWBT's facilities as follows:

                 a. In each SWBT exchange area in which DTI
                    chooses to offer local exchange service, DTI, at a
                    minimum, will interconnect its network facilities to: (a)
                    each SWBT access tandem(s), and (b) to either each SWBT
                    local tandem(s) or each SWBT end office(s) ("EO")
                    subtending that local tandem(s).  SWBT EOs and tandems
                    through which DTI will terminate its traffic will be called
                    SWBT Interconnection Wire Centers and are identified in
                    Appendix DCO.  As DTI initiates Exchange Service operations
                    in additional SWBT exchange areas, SWBT and DTI shall agree
                    upon additional SWBT Interconnection Wire Centers in each
                    new exchange area.  DTI agrees that if SWBT establishes
                    additional tandems in an exchange area within which DTI
                    offers local exchange service, DTI will interconnect to the
                    additional tandems.

                 b. Interconnection to a SWBT local tandem(s) will
                    provide DTI local access to the SWBT end offices and
                    NXXs which subtend that tandem(s), and to other Local
                    Exchange Carriers ("LECs") (subject to sub-section 5.4)
                    which are connected to that tandem(s). Interconnection to
                    SWBT EO(s) will provide DTI access only to the NXXs served
                    by that individual EO(s) to which DTI interconnects.

                 c. Interconnection to a SWBT access tandem will
                    provide DTI interexchange access to SWBT, IXCs, LECs
                    and CRMS providers (subject to sub-section 7.3) which are
                    connected to that tandem.  Where an access tandem also



<PAGE>   12

                                                    GENERAL TERMS AND CONDITIONS
                                                                  DTI - MISSOURI
                                                                    PAGE 7 OF 42

                    provides local tandem functions, interconnection to a
                    SWBT access tandem serving that exchange will also provide
                    DTI access to SWBT's EOs with the same functionality
                    described in (b) above.

                 d. Where DTI requires ancillary services (e.g.,
                    Directory Assistance, Operator Assistance, E911/911)
                    additional interconnection to SWBT's Interconnection Wire
                    Center(s) or special trunking will be required for
                    interconnection to such ancillary services.

     4.2.2. SWBT shall interconnect with DTI's facilities under terms and
conditions no less favorable than those identified in sub-section 4.2.1, above.

     4.3 METHODS FOR INTERCONNECTION

     Where the Parties interconnect, for the purpose of exchanging traffic
between networks, the Parties may use the following interconnection methods of
each Tandem and End Office identified in Appendix DCO making use of facilities
they own or lease from a third party.

            4.3.1 Physical Collocation Interconnection ("PCI") - Where DTI 
provides fiber cable and connects to its equipment located in the SWBT
Wire Center.  DTI owns and maintains DTI's equipment.

            4.3.2 Virtual Collocation Interconnection ("VCI") - Where DTI 
provides fiber cable to SWBT for connection to DTI-designated basic
transmission equipment dedicated solely for DTI's use, located in the SWBT
Interconnection Wire Center.  SWBT owns and maintains the basic transmission
equipment at the SWBT Interconnection Wire Center.  This option shall be
consistent with the terms of SWBT's virtual collocation tariff.

            4.3.3 SONET-Based Interconnection ("SBI") - Where DTI provides 
fiber cable to SWBT for connection to SWBT-designated basic
transmission equipment located at the SWBT Interconnection Wire Center and
dedicated solely for DTI's use. SWBT owns and maintains the basic transmission
equipment.  This option shall be consistent with SWBT's SBI tariff.

           4.3.4 Leased Facility Interconnection ("LFI") - Where network 
facilities exist, either Party may lease facilities from the other
Party at rates no greater than SWBT Access Tariff rates.

           4.3.5 Mid-span Fiber Interconnection ("MSFI") - Where the Parties 
agree to interconnect through SONET technology, using a Fujitsu originating line
terminating multiplexer fiber optic terminal ("FOT") details of this
architecture are addressed in Appendix MSFI attached hereto and incorporated by
reference.  This interconnection arrangement is limited to interconnecting
trunks.

<PAGE>   13
                                                    GENERAL TERMS AND CONDITIONS
                                                                  DTI - MISSOURI
                                                                    PAGE 8 OF 42

           4.3.6 The Parties may agree to utilize another Interconnection
Method as may be determined to be technically feasible in the future.

     4.4 PHYSICAL ARCHITECTURE.  Using one or more of the Interconnection
Methods described in Section 4.3 above, the Parties will agree on a physical
architecture plan.  This plan will be documented within Appendix DCO.  The
Parties agree to deploy one physical architecture plan per Metropolitan Serving
Area.  The two architecture arrangements, End Point Meet and Mid-Point Meet,
are discussed below.  Additional physical architectures, as yet undefined, may
evolve during the term of this Agreement.  These future as yet undefined
architectures can be deployed if mutually agreed upon.

           4.4.1 End Point Meet.  Using the "End Point Meet" architecture, the
Parties will establish transport facilities from their own Central Office(s) to
the other party's Central Office(s) utilizing any method of interconnection
described in Section 4.3 above.  Unless otherwise mutually agreed upon, each
Party will use its own transport facilities to provide its trunking as set
forth in Appendix ITR.  Each Party will be responsible for the appropriate
sizing, operation, and maintenance of its own transport facilities.  If
initially deployed as an End Point Architecture, the deployment architecture
may be migrated or groomed, upon mutual agreement, to a Mid-Point Meet
architecture.

           4.4.2 Mid-Point Meet.  Using the Mid-Point Meet architecture, the 
Parties will agree upon a Network Interconnection Point (NIP).  The NIP
functions as a demarcation point for each Party.  Each Party is responsible to
transport all trunking to its side of the NIP utilizing any method of
interconnection described in Section 4.3 above.  Each Party is responsible for
the appropriate sizing, operation, and maintenance of the transport facility
and trunking to the NIP.

           4.4.2.1 A second NIP can be established to eliminate a "single 
point of failure" when mutually agreed upon.  The establishment of the
second NIP should not require additional or increased trunking or facilities of
either Party. Trunking from the initial NIP will be groomed or augmented to the
second NIP upon mutual agreement.

           4.4.2.2 When required, based on guidelines established pursuant to
Appendix ITR, either Party may trunk directly to the other Party's EO.  If the
Party is virtually or physically collocated to the EO, then that collocation
will be designated a NIP.  This collocation will be used for the transport of
direct EO trunking, in addition to other uses.  The collocated Party is
responsible for the appropriate sizing, operation, and maintenance of the
transport facility.  In the instance where the Party is not collocated, the EO
trunk group will be handed off at the original NIP and both Parties will be
responsible for the transport facility on their side of that NIP.

           4.4.2.3 Unless otherwise mutually agreed upon, when Mid-Point Meet
architecture has been deployed, it will remain as the architecture of choice
during the term of this Agreement.

<PAGE>   14

                                                    GENERAL TERMS AND CONDITIONS
                                                                  DTI - MISSOURI
                                                                    PAGE 9 OF 42

 4.5 TECHNICAL SPECIFICATIONS

     4.5.1 DTI and SWBT shall work cooperatively to install and maintain a
reliable network.  DTI and SWBT shall exchange appropriate information (e.g.,
maintenance contact numbers, network information, information required to
comply with law enforcement and other security agencies of the Government and
such other information as the Parties shall mutually agree) to achieve this
desired reliability.

     4.5.2 DTI and SWBT shall work cooperatively to apply sound network
management principles by invoking network management controls to alleviate or
to prevent congestion.

     4.5.3 Technical Publications that describes the practices, procedures,
specifications and interfaces generally utilized by SWBT, are listed in
Appendix TP attached hereto and incorporated by reference.  Appendix TP will
herein assist the Parties in meeting their respective Interconnection
responsibilities.  Copies of the publications listed in Appendix TP have been
or shall be provided to DTI by SWBT.

 4.6 INTERCONNECTION IN ADDITIONAL METROPOLITAN EXCHANGE AREAS

     4.6.1 If DTI decides to offer Telephone Exchange Services in any other
Metropolitan Exchange and Areas in which SWBT also offers Telephone
Exchange Services, DTI shall provide written notice to SWBT of the need to
establish Interconnection in such Metropolitan Exchange Areas pursuant to this
Agreement.

     4.6.2 The notice provided in Section 4.6.1 shall include: (i) the initial
Routing Point DTI has designated in the Metropolitan Exchange Area; (ii) DTI's
requested Interconnection Activation Date; and (iii) a non-binding forecast of
DTI's trunking requirements.

     4.6.3 Unless otherwise agreed by the Parties, the Parties shall designate
the Wire Center that DTI has identified as its initial Routing Point in the
Metropolitan Exchange Area as DTI Interconnection Wire Center ("IWC") in that
Metropolitan Exchange Area and shall designate the SWBT Tandem Office Wire
Center within the Metropolitan Exchange Area nearest to the IWC (as measured in
airline miles utilizing the V&H coordinates method) as the SWBT Interconnection
Wire Center (SIWC) in that Metropolitan Exchange Area.

     4.6.4 Unless otherwise agreed by the Parties, the Interconnection
Activation Date in each new Metropolitan Exchange Area shall be the one-hundred
and fiftieth (150th) day following the date on which DTI delivered notice to
SWBT of the need to establish Interconnection pursuant to Section 4.6.1 above.
Within ten (10) business days of SWBT's receipt of DTI's notice, SWBT and DTI
shall confirm their respective Wire Centers to be Interconnected and the
Interconnection Activation Date for the new Metropolitan Exchange Area by
attaching a supplementary schedule to Appendix DCO.

<PAGE>   15

                                                    GENERAL TERMS AND CONDITIONS
                                                                  DTI - MISSOURI
                                                                   PAGE 10 OF 42

5.0  TRANSMISSION AND ROUTING OF TELEPHONE EXCHANGE SERVICE TRAFFIC PURSUANT
     TO SECTION 251(c)(2)

     5.1 SCOPE OF TRAFFIC

     This Section 5.0 prescribes parameters for Traffic Exchange trunk groups
the Parties shall establish over the Interconnections specified in Section 4.0.
The Parties shall employ the Traffic Exchange trunk groups specified in this
Section 5.0 and in Appendix ITR.  The Parties shall employ for the transmission
and routing of all Local and IntraLATA Toll Traffic between the Parties'
respective Telephone Exchange Service end users.

         5.1.1 For purposes of compensation under this Agreement, the
telecommunications traffic traded between DTI and SWBT will be classified as
either Local Traffic, Transit Traffic, Optional Calling Area Traffic, IntraLATA
Interexchange Traffic, InterLATA Interexchange Traffic, or FGA Traffic.  The
compensation arrangement for the joint provision of Feature Group A (FGA)
Services is covered in Appendix FGA, attached hereto and incorporated herein by
reference.  The Parties agree that, notwithstanding the classification of
traffic under this Agreement, either Party is free to define its own "local"
calling area(s) for purposes of its provision of Telecommunications Services to
its end users.

         5.1.2 Calls originated by one Party's end user and terminated to the 
other Party's end user will be classified as "Local Traffic" under this
Agreement if the call: (i) originates and terminates in the same SWBT exchange
area; or (ii) originates and terminates within different SWBT Exchanges that
share a common mandatory local calling area, e.g., mandatory Extended Area
Service (EAS), mandatory Extended Local Calling Service (ELCS), or other like
types of mandatory expanded local calling scopes.

     5.2 RESPONSIBILITIES OF THE PARTIES

         5.2.1 Each Party to this Agreement will be responsible for the accuracy
and quality of its data as submitted to the respective Parties involved.

         5.2.2 Each Party will include in the information transmitted to the 
other for each call being terminated on the other's network (where
available), the originating Calling Party Number (CPN).
        
         5.2.3 If the percentage of calls passed with CPN is greater than ninety
percent (90%), all calls exchanged without CPN information will be billed as
either Local Traffic or IntraLATA Toll Traffic in direct proportion to the
minutes of use (MOU) of calls exchanged with CPN information.  If the
percentage of calls passed with CPN is less than ninety percent (90%), all
calls passed without CPN will be billed as switched access.

<PAGE>   16

                                                    GENERAL TERMS AND CONDITIONS
                                                                  DTI - MISSOURI
                                                                   PAGE 11 OF 42

         5.2.4 The type of originating calling number transmitted depends on the
protocol of the trunk signaling used for interconnection.  Traditional toll
protocol will be used with Multi-Frequency (MF) signaling, and ANI will be sent
from the originating Party's end office switch to the terminating Party's
tandem or end office switch.

         5.2.5 Where one Party is passing CPN but the other party is not 
properly receiving information, the Parties will cooperate to rate the
traffic correctly.

     5.3 RECIPROCAL COMPENSATION FOR TERMINATION OF LOCAL TRAFFIC

         5.3.1 The Compensation set forth below will apply to all Local 
Traffic as defined in sub-section 5.1.2 of this Agreement.

         5.3.2 Applicability of Rates

               i)  The rates, terms, conditions in this Section 5.3 apply
                   only to the termination of Local Traffic, except as
                   explicitly noted.

               ii) The Parties agree to compensate each other for the
                   termination of Local Traffic on a minute of use (MOU) basis.

         5.3.3 Rate Elements

               5.3.3.1 A Tandem Served rate element is applicable to Tandem 
Routed Local Traffic on a terminating local MOU basis and includes
compensation for the following sub-elements:

                       i)   Tandem Switching - compensation for the use of 
                            tandem switching functions.

                       ii)  Tandem Transport - compensation for the transmission
                            facilities between the local tandem and the end
                            offices subtending that tandem.

                       iii) End Office Switching - compensation for the local EO
                            office switching and line termination functions
                            necessary to complete the transmission.

               5.3.3.2 An End Office Served rate element applies to 
direct-routed Local Traffic on a terminating local MOU basis and
includes compensation for End Office Switching.  This includes direct-routed
Local Traffic that terminates to offices that have combined tandem and End
Office functions.

<PAGE>   17
                                                    GENERAL TERMS AND CONDITIONS
                                                                  DTI - MISSOURI
                                                                   PAGE 12 OF 42

               5.3.4 Local Traffic Interconnection Rates

               Serving Method            Prices Per MOU
               Tandem Served             $.00975
               End Office Served         $.00720

     5.4 RECIPROCAL COMPENSATION FOR TRANSIT TRAFFIC

         5.4.1 Transit Traffic allows one Party to send traffic to a third party
network through the other Party's tandem.  A Transit Traffic rate element
applies to all MOUs between a Party and third party networks that transit the
other Party's tandem switch.  The originating Party is responsible for the
appropriate rates unless otherwise specified.  The Transit Traffic rate element
is only applicable when calls do not originate with (or terminate to) the
transit Party's end user.  The two categories of Transit Traffic are: i) Local,
and ii) Optional Area.  The following details when each element applies:

               i)  The Local Transit Traffic rate element applies when both
                   the originating and terminating end users are within SWBT
                   local and mandatory exchanges.

               ii) The Optional Area Transit Traffic rate element applies
                   when one end user is in a SWBT optional exchange which is
                   listed in Appendix Map and the other end user is within the
                   SWBT local or mandatory exchanges.  The Parties agree also to
                   apply the Optional Area Transit rate to traffic terminating
                   to third party incumbent LECs that share a common mandatory
                   local calling area with all SWBT exchanges included in a
                   specific metropolitan exchange area.  ILEC mandatory
                   exchanges are listed in Appendix Map.

               5.4.1.1 The Parties acknowledge that traffic originated in 
third party incumbent LEC mandatory exchange areas as listed in
Appendix Map, which is attached hereto and incorporated by reference, may
traverse the SWBT tandem and terminate in other third party LEC exchange areas. 
Although direct connections could be used for this traffic, SWBT agrees to
transit this traffic for the rate of $0.006 per MOU if the other LEC exchanges
share a common mandatory local calling area with all SWBT exchanges included in
a specific exchange area.

               Type of Transit Traffic          Prices Per MOU

               Local Transit                    $0.003
               Optional Area Transit            $0.004

<PAGE>   18

                                                    GENERAL TERMS AND CONDITIONS
                                                                  DTI - MISSOURI
                                                                   PAGE 13 OF 42

     5.4.2 All other traffic which transits a tandem shall be treated as
Meet-Point Billing Traffic as described in Section 5.6 below or as intraLATA
interexchange traffic as described in Section 5.5.3 below, unless otherwise
agreed.

     5.4.3 Each Party represents that it shall not send Local Traffic to the
other Party that is destined for the network of a third party unless and until
such Party has the authority to exchange traffic with the third party.

 5.5 RECIPROCAL COMPENSATION FOR TERMINATION OF INTRALATA INTEREXCHANGE
     TRAFFIC

     5.5.1 Optional Calling Area Compensation (OCA) - For the SWBT optional
calling areas listed in Appendix Map, the compensation for termination of
intercompany traffic will be at a rate of $0.016 per MOU.  This terminating
compensation rate applies to all traffic to and from the exchange(s) listed in
Appendix Map, and the associated metropolitan area and is independent of any
retail service arrangement established by either DTI or SWBT.

     5.5.2 The parties also agree to apply the OCA compensation rate of $0.016
per MOU for traffic terminating to DTI end users in other incumbent LEC
exchange that share a common mandatory local calling area with all SWBT
exchanges that are included in the metropolitan exchange area.  Appendix Map
lists the shared mandatory local calling areas.

     5.5.3 For intrastate intraLATA interexchange service traffic, compensation
for termination of intercompany traffic will be at terminating access rates for
Message Telephone Service (MTS) and originating access rates for 800 Service,
including the Carrier Common Line (CCL) charge, as set forth in each party's
Intrastate Access Service Tariff or as otherwise mutually agreed.  For
interstate intraLATA intercompany service traffic, compensation for termination
of intercompany traffic will be at terminating access rates for MTS and
originating access rates for 800 Service including the CCL charge, as set forth
in each party's interstate Access Service Tariff or as otherwise mutually
agreed.

 5.6 COMPENSATION FOR ORIGINATION AND TERMINATION OF SWITCHED ACCESS
     SERVICE TRAFFIC TO OR FROM AN IXC (MEET-POINT BILLING (MPB) ARRANGEMENTS)

     5.6.1 For interstate, interLATA traffic, terminating compensation will be
at access rates as set forth in each Party's own applicable access tariffs.

     5.6.2 The Parties will establish MPB arrangements in order to provide
Switched Access Services to IXCs via SWBT's access tandem switch in accordance
with the MPB guidelines adopted by and contained in the Ordering and Billing
Forum's MECOD and MECAB documents.  DTI's Meet Points with SWBT shall be those
identified in Appendix DCO and any supplements thereto.

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                                                    GENERAL TERMS AND CONDITIONS
                                                                  DTI - MISSOURI
                                                                   PAGE 14 OF 42

     5.6.3 Billing to IXCs for the Switched Exchange Access Services jointly
provided by the Parties via Meet-Point Billing arrangement shall be according
to the multiple bill/multiple tariff method.  As described in the MECAB
document, each Party will render a bill in accordance with its own tariff for
that portion of the service it provides.  For the purpose of this Agreement,
DTI is the Initial Billing Company (IBC) and SWBT is the Subsequent Billing
Company (SBC).  The assignment of revenues, by rate element, and the Meet-Point
Billing percentages applicable to this Agreement are set forth in Appendix DCO.
The actual rate values for each element shall be the rates contained in that
Party's own applicable access rates.

     5.6.4 The Parties, as applicable, will maintain provisions in their
respective federal and state access tariffs, or provisions within the National
Exchange Carrier Association (NECA) Tariff No.  4, or any successor tariff,
sufficient to reflect this MPB arrangement, including MPB percentages.

     5.6.5 As detailed in the MECAB document, the Parties will, in accordance
with accepted time intervals, exchange all information necessary to accurately,
reliably and promptly bill third Parties for Switched Access Services traffic
jointly handled by the Parties via the Meet Point Arrangement.  Each Party
reserves the right to charge the other Party for the recording/processing
functions it performs pursuant to the terms and conditions of Appendix
Recording attached hereto and incorporated by reference.  Information shall be
exchanged in Exchange Message Record (EMR) format, on magnetic tape or via a
mutually acceptable electronic file transfer protocol.

     5.6.6 Initially, billing to IXCs for the Switched Access Services jointly
provided by the parties via the MPB arrangement will be according to the
multiple bill/multiple tariff method, as described in the MECAB document.  Each
Party will render a bill to the IXC in accordance with its own rate structure
for that portion of the service it provides.  Each Party will bill its own
network access service rates to the IXC.  The residual interconnection charge
(RIC), if any, will be billed by the Party providing the End Office function.

     5.6.7 Meet-Point Billing shall also apply to all jointly provided MOU
traffic bearing the 900, 800, and 888 NPAs or any other non-geographic NPAs
which may likewise be designated for such traffic in the future where the
responsible party is an IXC.  When SWBT performs 800 database queries, SWBT
will charge the provider of the Signaling Service Point for the database query
in accordance with standard industry practices.

     5.6.8 Each Party shall coordinate and exchange the billing account
reference ("BAR") and billing account cross reference ("BACR") numbers for the
Meet Point Billing service.  Each Party shall notify the other if the level of
billing or other BAR/BACR elements change, resulting in a new BAR/BACR number.

     5.6.9 Each Party will provide the other with the Exchange Access detailed
usage data within thirty (30) days of the end of the billing period.  SWBT will
perform assembly and editing, messages processing and provision of Access Usage
Records in accordance with 

<PAGE>   20
                                                    GENERAL TERMS AND CONDITIONS
                                                                  DTI - MISSOURI
                                                                   PAGE 15 OF 42

Appendix Recording, attached hereto and incorporated by reference. 
Each Party will provide to the other the Exchange Access summary usage data
within ten (10) working days after the date that a bill is rendered to the IXC
by the initial Party.  To the extent DTI provides SWBT with Access Usage
Records, SWBT will compensate DTI on the same terms as DTI compensates SWBT per
Appendix Recording.  SWBT acknowledges that currently there is no charge for
Summary Usage Data Records but that such a charge may be appropriate.  At DTI's
request, SWBT will negotiate a mutual and reciprocal charge for provision of
Summary Usage Data Records.

     5.6.10 Errors may be discovered by DTI, the IXC or SWBT.  Both SWBT and
DTI agree to provide the other Party with notification of any discovered errors
within two (2) business days of the discovery.

     5.6.11 In the event of a loss of data, both Parties shall cooperate to
reconstruct the lost data within sixty (60) days of notification and if such
reconstruction is not possible, shall accept a reasonable estimate of the lost
data, based upon no more than three (3) to twelve (12) months of prior usage
data, if available.

 5.7 BILLING ARRANGEMENTS FOR COMPENSATION FOR TERMINATION OF INTRALATA,
     LOCAL, TRANSIT, AND OPTIONAL CALLING AREA TRAFFIC

     5.7.1 Other than for traffic described in sub-section 5.6 above, each
Party shall deliver monthly settlement statements for terminating the other
Party's traffic based on the following:

     5.7.1.1 Each Party shall, unless otherwise agreed, adhere to the detailed
technical descriptions and requirements for the recording, record exchange, and
billing of traffic using the guidelines as set forth in the Technical Exhibit
Settlement Procedures (TESP), previously provided by SWBT to DTI.  Reference to
this technical publication is included in Appendix TP.

     (a) Where DTI has direct/high usage trunks to a SWBT end
         office with overflow trunking through a SWBT tandem, billing for
         the Tandem Traffic will be calculated as follows:

         Total Originating MOUs Recorded By DTI Less Direct End Office
         Terminating MOUs Recorded By SWBT Equals Total MOUs To Be
         Compensated As Tandem Traffic

     (b) Where DTI has direct/high usage trunks to a third party
         with overflow trunking through a SWBT tandem, DTI must
         differentiate the originating MOU records for the Parties to
         ascertain how many MOUs should be compensated as Transit Traffic.
         If DTI is unable to so differentiate the originating MOU 


<PAGE>   21
                                                    GENERAL TERMS AND CONDITIONS
                                                                  DTI - MISSOURI
                                                                   PAGE 16 OF 42
            
                         records, the Parties shall mutually agree upon a 
                         surrogate method for calculating Transit Traffic
                         charges owed to SWBT.

                 5.7.1.2 On a monthly basis, each Party will record its 
originating MOU including identification of the originating and terminating 
NXX for all intercompany calls.

         5.7.1.3 Each Party will transmit the summarized originating 
MOU from Section 5.7.1.1 above to the transiting and/or terminating
Party for subsequent monthly intercompany settlement billing.

         5.7.1.4 Bills rendered by either Party will be paid within 
thirty (30) days of receipt subject to subsequent audit verification.

         5.7.1.5 MOUs for the rates contained herein will be measured 
in seconds by call type, and accumulated each billing period into one
(1) minute increments for billing purposes in accordance with industry rounding
standards.

                 5.7.1.6 Each Party will multiply the tandem routed and 
end office routed terminating MOUs by the appropriate rate contained in this 
Section to determine the total monthly billing to each Party.

     5.8 COMPENSATION FOR "PORTING" OPTIONAL CALLING AREA NUMBERS

     In those instances where an Optional Calling Area telephone number is
ported, DTI will compensate SWBT $12.40 monthly, per ported number.

6.0  TRANSMISSION AND ROUTING OF EXCHANGE ACCESS TRAFFIC PURSUANT TO 251(c)(2)

     6.1 SCOPE OF TRAFFIC

     Section 6.0 prescribes parameters for certain trunk groups ("Access Toll
Connecting Trunks") to be established over the Interconnections specified in
Section 4.0 above, for the transmission and routing of Exchange Access traffic
between DTI Telephone Exchange Service end users and IXCs via a SWBT access
tandem.

     6.2 TRUNK GROUP ARCHITECTURE AND TRAFFIC ROUTING

     6.2.1 The Parties shall jointly establish Access Toll Connecting Trunks as
described in Appendix ITR, by which will jointly provide tandem-transported
Switched Exchange Access Services to IXCs to enable DTI's end users to
originate and terminate traffic to/from such IXCs.

<PAGE>   22
                                                    GENERAL TERMS AND CONDITIONS
                                                                  DTI - MISSOURI
                                                                   PAGE 17 OF 42

        
        6.2.2 Access Toll Connecting Trunks shall be used solely for the
transmission and routing of Switched Exchange Access to allow DTI end
users to originate and terminate traffic to/from any IXCs which is connected to
a SWBT Access Tandem.  In addition, the trunks shall be used to allow DTI's end
users to connect to, or be connected to, the 800 Services of any
Telecommunications Carrier connected to the SWBT Access Tandem.

7.0 TRANSPORT AND TERMINATION OF OTHER TYPES OF TRAFFIC

    7.1 INFORMATION SERVICES TRAFFIC

        7.1.1 At such time as the Parties agree to route intraLATA Information
Services Traffic to one another, they shall agree to exchange rating and
billing information to effectively allow the Parties to bill their end users
and to charge reciprocal rates.

    7.2 LINE STATUS VERIFICATION (LSV)/BUSY LINE INTERRUPT (BLI) TRAFFIC

        7.2.1 Each Party's operator bureau shall accept LSV and BLI inquiries 
from the operator bureau of the other Party in order to allow
transparent provision of LSV/BLI Traffic between the Parties' networks.  Only
one LSV attempt will be made per end user operator bureau call, and the
applicable charge shall apply whether or not the line is busy at the time of
verification or if the called party agrees to release the line.  Only one BLI
attempt will be made per end user operator telephone call, and the applicable
charge shall apply whether or not the line is in use at the to time of
interrupt or the called party releases the line.

        7.2.2 Each Party shall route LSV/BLI Traffic inquiries between the
Parties' respective operator bureaus over trunks described in Appendix ITR.

    7.3 WIRELESS TRAFFIC

        7.3.1 Appendix Wireless, attached hereto and incorporated by reference
sets forth the terms and conditions under which the Parties will distribute
revenue from their joint provision of Wireless Interconnection Service for
mobile to landline traffic terminating through the Parties' respective wireline
switching networks within a LATA.  If one Party enters into an interconnection
agreement with a CMRS provider, Appendix Wireless shall no longer be applicable
between the Parties with respect to such CMRS providers, and the other Party
shall be obligated to enter into an agreement with such CMRS provider for the
termination of wireless to landline traffic.

        7.3.2 DTI shall pay the Local Transit Traffic rate to SWBT for calls 
that originate on DTI's network and are sent to SWBT for termination to
a CMRS Provider as long as such Traffic can be identified as wireless traffic. 
SWBT shall pay the Local Transit Traffic rate to DTI for such calls that
originate on SWBT's network are sent through DTI for termination on a CMRS
Provider's network.  Each Party shall be responsible for interconnection

<PAGE>   23
                                                    GENERAL TERMS AND CONDITIONS
                                                                  DTI - MISSOURI
                                                                   PAGE 18 OF 42

agreements with CMRS providers for terminating compensation regarding traffic
originating on the Party's network and terminating on the CMRS provider's
network.

     7.3.3 When traffic is originated by either Party to a CMRS Provider, and
the traffic cannot be specifically identified as wireless traffic for purposes
of compensation between SWBT and DTI, the traffic will be rated either as
Local, Optional or Access and the appropriate compensation rate shall be paid
by the originating Party to the transiting Party.  The originating
Party agrees to indemnify the transiting Party for any claims of compensation
that may be made by the CMRS provider against the transiting Party regarding
compensation for such traffic.

8.0 SIGNALING

     8.1 The SWBT signaling publications that describe the practices,
procedures and specifications generally utilized by SWBT for signaling purposes
and are listed in Appendix TP which is attached hereto and incorporated herein.
A copy of these publications have been provided to DTI.

     8.2 The Parties will cooperate on the exchange of Transactional
Capabilities Application Part (TCAP) messages to facilitate interoperability of
CCS-based features between their respective networks, including all CLASS
features and functions, to the extent each Party offers such features and
functions to its end users.  All CCS signaling parameters will be provided
including, without limitation, calling party number (CPN), originating line
information (OLI), calling party category and charge number.

9.0 NUMBERING

     9.1 Nothing in this Agreement shall be construed to limit or otherwise
adversely impact in any manner either Party's right to employ or to request and
be assigned any North American Numbering Plan (NANP) number resources
including, but not limited to, central office (NXX) codes pursuant to the
Central Office Code Assignment Guidelines(1), or to establish, by tariff or
otherwise, Exchanges and Rating Points corresponding to such NXX codes.  Each
Party is responsible for administering the NXX codes it is assigned.

     9.2 At a minimum, in those Metropolitan Exchange Areas where DTI intends
to provide local exchange service, DTI shall obtain a separate NXX code for
each SWBT exchange or group of exchanges that share a common mandatory calling
scope as defined in SWBT tariffs.  This will enable DTI and SWBT to identify
the jurisdictional nature of traffic for intercompany compensation until such
time as both Parties have implemented billing and routing capabilities to
determine traffic jurisdiction on a basis other than NXX codes.

- ---------------------
(1)     Last published by the Industry Numbering Committee ("INC") as INC
95-0407-008, Revision 4/7/95, formerly ICCF 93-0729-010.

<PAGE>   24

                                                    GENERAL TERMS AND CONDITIONS
                                                                  DTI - MISSOURI
                                                                   PAGE 19 OF 42

     9.3 Each Party agrees to make available to the other, up-to-date listings
of its own assigned NPA-NXX codes, along with associated Rating Points and
Exchanges.

     9.4 To the extent SWBT serves as Central Office Code Administrator for a 
given region, SWBT commits to treat DTI requests for assignment of central
office code(s) in a neutral and nondiscriminatory manner, consistent with
regulatory requirements, and (NXX) Central Office Code Assignment Guidelines.

     9.5 Each Party is responsible to program and update its own switches and
network systems to recognize and route traffic to the other Party's
assigned NXX codes at all times. Neither Party shall impose fees or charges on
the other Party for such required programming and updating activities.

     9.6 Each Party is responsible to input required data into the Routing Data
Base Systems (RDBS) and into the Bellcore Rating Administrative Data Systems
(BRADS) or other appropriate system(s) necessary to update the Local Exchange
Routing Guide (LERG), unless negotiated otherwise.

     9.7 Neither Party is responsible for notifying the other Parties' end
users of any changes in dialing arrangements, including those due to NPA
exhaust, unless otherwise ordered by the Commission, the FCC, or a court.

     9.8 NXX MIGRATION.  Where either Party has activated an entire NXX for a
single end user, or activated more than half of an NXX for a single end user
with the remaining numbers in that NXX either reserved for future use or
otherwise unused, if such end user chooses to receive service from the other
Party, the first Party shall cooperate with the second Party to have the entire
NXX reassigned in the LERG (and associated industry databases, routing tables,
etc.) to an End Office operated by the second Party.  Such transfer will
require development of a transition process to minimize impact on the Network
and on the end user(s)' service and will be subject to appropriate industry
lead times (currently forty-five (45) days) for movements of NXXs from one
switch to another.  The Party to whom the NXX is migrated will pay NXX
migration charges of $10,000 per NXX to the Party formerly assigned the NXX.

10.0 RESALE--SECTIONS 251(b)(1); 251(c)(4); 252(d)(3); and 271(c)(2)(B)(xiv);

     10.1 AVAILABILITY OF SWBT RETAIL TELECOMMUNICATIONS SERVICES FOR RESALE

     SWBT shall offer to DTI for resale at wholesale rates its
Telecommunications Services, as described in Section 25l(c)(4) of the Act,
pursuant to the terms and conditions of Appendix Resale attached hereto and
incorporated herein by this reference.

<PAGE>   25
                                                    GENERAL TERMS AND CONDITIONS
                                                                  DTI - MISSOURI
                                                                   PAGE 20 OF 42


     10.2 AVAILABILITY OF DTI RETAIL TELECOMMUNICATION SERVICES FOR RESALE

          DTI shall make available its Telecommunications Services for
          resale at wholesale rates to SWBT in accordance with Section 251
          (b)(1) of the Act.

11.0 UNBUNDLED NETWORK ELEMENTS -- SECTIONS 251(c)(3), 271(c)(2)(B)
     (ii),(iv),(v),(vi),(x)

     11.1 SWBT shall provide DTI access to unbundled network elements for the
provision of a telecommunication service as described in Section 251(c)(3) and
271(c)(2)(B) of the Act, pursuant to the terms and conditions of Appendix UNE
attached hereto and incorporated herein by this reference.

          11.2 DTI shall make available to SWBT access to its Unbundled Network
elements in accordance with Section 251(c)(3) of the Act.

12.0 NOTICE OF CHANGES--SECTION 251(c)(5)

     Nothing in this Agreement shall limit either Party's ability to upgrade
its network through the incorporation of new equipment, new software or
otherwise.  If a Party makes a change in its network which it believes will
materially affect the interoperability of its network with the other Party, the
Party making the change shall provide at least ninety (90) days advance written
notice of such change to the other Party.  Notwithstanding the foregoing, if
either Party establishes additional tandems in an exchange area in which the
other Party offers local exchange service, that Party will provide the other
Party with not less than one-hundred eighty (180) days' advance notification of
same, and with greater notification when practicable.  Both Parties agree to
coordinate interconnection matters consistent with the requirements of the
Americans with Disabilities Act (42 U.S.C. 12101) and with Sections 255 and 256
of the Act.  In addition, the Parties will comply with the Network Disclosure
rules adopted by the FCC in CC Docket No. 96-98, Second Report and Order, as
may be amended from time to time.  The Party upgrading its network shall be
solely responsible for the cost and effort of accommodating such changes in its
own network.

13.0 COLLOCATION--SECTION 251(c)(6)

     13.1 SWBT shall provide to DTI Physical Collocation space necessary for
Interconnection (pursuant to Section 4.0 of this Agreement) or access to
Network Elements on an unbundled basis except that SWBT may provide for Virtual
Collocation if SWBT demonstrates that Physical Collocation is not practical for
technical reasons or because of space limitations, as provided in Section
251(c)(6) of the Act.  SWBT shall provide such Collocation for the purpose of
Interconnection or access to Network Elements on an unbundled basis, except as
otherwise mutually agreed to in writing by the Parties or as required by the
FCC or the appropriate Commission, subject to applicable federal and state
tariffs.

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                                                    GENERAL TERMS AND CONDITIONS
                                                                  DTI - MISSOURI
                                                                   PAGE 21 OF 42


     13.2 Except as otherwise ordered by the Commission or the FCC, or as
mutually agreed to by DTI and SWBT, Physical Collocation shall be available at
a Central Office Switch location classified as an end office location, a
serving wire center, a tandem office location, or a remote node that serves as
a rating point for special access or switched access transport.

14.0 NUMBER PORTABILITY--SECTIONS 251(b)(2) and 271(c)(2)(B)(xi)

     14.1 The Parties shall provide to each other Interim Number Portability
(INP) on a reciprocal basis.  Pursuant to the provisions in the Act, and in
accordance with the terms and conditions outlined in Appendix PORT, which is
attached hereto and incorporated herein, SWBT will provide DTI Interim Number
Portability through Remote Call Forwarding and Direct Inward Dialing technology
until Permanent Number Portability is implemented.

     14.2 Once Permanent Number Portability is implemented, either Party may
withdraw, at any time and at its sole discretion, its INP offerings, subject to
thirty (30) day's advance notice to the other Party to allow the seamless and
transparent conversion of INP end user numbers to Permanent Number Portability.

15.0 DIALING PARITY--SECTION 251(b)(3); 271(c)(2)(B)(xii); and 271(e)(2)

     15.1 The Parties shall provide Local Dialing Parity to each other as
required under Section 251(b)(3) of the Act.

     15.2 SWBT shall provide IntraLATA Dialing Parity in accordance with
Section 271(e)(2) of the Act.

16.0 ACCESS TO RIGHTS-OF-WAY--SECTION 251(b)(4) and 271(c)(2)(B)(iii)

     Each Party shall provide the other Party access to its poles, ducts,
rights-of-way and conduits it owns or controls in accordance with Section 224
of the Act on terms, conditions and prices comparable to those offered to any
other entity pursuant to each Party's applicable tariffs and/or standard
agreements.

17.0 DATABASE ACCESS--SECTION 271(c)(2)(B)(x)

     In accordance with Section 27(c)(2)(B)(x) of the Act, SWBT shall provide
DTI with nondiscriminatory access to databases and associated signaling
necessary for call routing and completion.  When requesting access to databases
not otherwise provided for in this Agreement, or appropriate interfaces,
regardless of whether they constitute unbundled Network Elements, DTI will use
the Network Element Bona Fide Request process.  This process is defined in
Appendix UNE, which is attached hereto and incorporated herein by reference.

<PAGE>   27

                                                    GENERAL TERMS AND CONDITIONS
                                                                  DTI - MISSOURI
                                                                   PAGE 22 OF 42

18.0 INTERCEPT REFERRAL ANNOUNCEMENTS

     18.1 The Party formerly providing service to an end user shall provide a
Basic Referral announcement, reciprocally and free of charge on the abandoned
telephone number.  The announcement states that the called number has been
disconnected or changed and provides the end user's new telephone number to the
extent that it is listed.

           (a) Basic Intercept Referral Announcements are to be provided on
               residential numbers for a minimum of thirty (30) days where
               facilities exist and the threat of telephone number exhaustion
               is not imminent.

           (b) Basic Intercept Referral Announcements for a single line
               business end user and the primary listed telephone number for
               DID and "Centrex-type" end users, shall be available for a
               minimum of thirty (30) days or the life of the White Pages
               directory, whichever is greater.  If the threat of telephone
               number exhaustion becomes imminent for a particular Central
               Office, the service provider may reissue a disconnected number
               prior to the expiration of the directory, but no earlier than
               thirty (30) days after the disconnection of the business
               telephone number.

19.0 COORDINATED REPAIR CALLS

     19.1 To avoid and minimize the potential for end user confusion, each
Party shall inform their respective end users of their respective
repair bureau telephone number(s) to access such bureaus.  In the event that
either Party receives a misdirected repair call, the Parties agree to employ
the following procedures for handling such calls:

           (a) To the extent the correct provider can be determined,
               misdirected repair calls will be referred to the proper
               provider of local exchange service in a courteous manner, at no
               charge, and the end user will be provided the correct contact
               telephone number.

           (b) In responding to repair calls, neither Party shall make
               disparaging remarks about each other, nor shall they use these
               repair calls as the basis for internal referrals or to solicit
               customers or to market services, nor shall they initiate
               extraneous communications beyond the direct referral to the
               correct repair telephone number.

20.0 OTHER SERVICES 271(c)(B)(2)(vii) and 271(c)(2)(B)(viii)

     20.1 WHITE PAGES.  In accordance with Section 271(c)(2)(B)(viii) of the
Act, SWBT will make nondiscriminatory access to White Pages service available
under the terms and conditions of Appendix WP, attached hereto and incorporated
by reference.

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                                                    GENERAL TERMS AND CONDITIONS
                                                                  DTI - MISSOURI
                                                                   PAGE 23 OF 42

     20.2 CALLING NAME INFORMATION.  The Parties shall provide, on mutually
agreeable and reciprocal terms, each other with access to Calling Name
information of their respective end users whenever one Party initiates a query
from a Signaling System Point for such information associated with a call
terminating to an end user who subscribes to a calling name service.  SWBT will
provide Calling Name Information in accordance with and under the terms and
conditions of Appendix CNAM, attached hereto and incorporated by reference.

     20.3 BILLING/COLLECTING/REMITTING.  The Parties will jointly agree to
terms and conditions for Billing, Collecting and Remitting for alternated
billed local message as described in Appendix BCR, attached hereto and
incorporated by reference.

     20.4 911 AND E911 SERVICES.  Pursuant to Section 271(c)(2)(B)(vii) of the
Act, SWBT will make nondiscriminatory access to 911 and E911 services available
under the terms and conditions of Appendix 911, attached hereto and
incorporated by reference.

     20.5 DIRECTORY ASSISTANCE (DA).  Pursuant to Section 271(c)(2)(B)(vii)(II)
of the Act, SWBT will provide nondiscriminatory access to DA services under the
terms and conditions identified in Appendix DA, attached hereto and
incorporated by reference.


     20.6 OPERATOR SERVICES.  Pursuant to Section 271(c)(2)(B)(vii)(III) of the
Act, SWBT shall provide nondiscriminatory access to Operator Services under the
terms and conditions identified in Appendix OS, attached hereto and
incorporated by reference.

     20.7 CLEARINGHOUSE SERVICES.  To the extent requested by DTI, SWBT shall
provide for the tracking of message revenues from certain messages to
facilitate the transfer of revenues between the billing company the earning
company through the Clearinghouse Services provided by SWBT pursuant to the
terms and conditions in Appendix CH, attached hereto and incorporated by
reference.

     20.8 HOSTING.  At DTI's request, SWBT shall perform hosting
responsibilities for the provision of billable message data and/or access usage
data received from an DTI for distribution to the appropriate billing and/or
processing location or for delivery to an DTI of such data via SWBT's internal
network or the nationwide CMDS network pursuant to Appendix HOST, attached
hereto and incorporated by reference.

     20.9 SIGNALING SYSTEM 7 INTERCONNECTION.  At DTI's request, SWBT shall
perform SS7 interconnection services for DTI pursuant to Appendix SS7, attached
hereto and incorporated by reference.

21.0 GENERAL RESPONSIBILITIES OF THE PARTIES

     21.1 SWBT and DTI shall each use their best efforts to meet the
Interconnection Activation Dates.

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                                                    GENERAL TERMS AND CONDITIONS
                                                                  DTI - MISSOURI
                                                                   PAGE 24 OF 42

     21.2 Each Party is individually responsible to provide facilities within
its network that are necessary for routing, transporting, measuring, and
billing traffic from the other Party's network and for delivering such traffic
to the other Party's network in the standard format compatible with SWBT's
network as referenced in Bellcore's BOC Notes on LEC Networks Practice No.
SR-TSV-002275, and to terminate the traffic it receives in that standard format
to the proper address on its network.  The Parties are each solely responsible
for participation in and compliance with national network plans, including the
National Network Security Plan and the Emergency Preparedness Plan.

     21.3 Neither Party shall use any service related to or use any of the
services or elements provided in this Agreement in any manner that interferes
with other persons in the use of their service, prevents other persons from
using their service, or otherwise impairs the quality of service to other
carriers or to either Party's end users, and either Party may discontinue or
refuse service, but only for so long as the other Party is violating this
provision.  Upon such violation, either Party shall provide the other Party
notice of the violation at the earliest practicable time.

     21.4 Each Party is solely responsible for the services it provides to its
end users and to other Telecommunications Carriers.

     21.5 The Parties shall work cooperatively to minimize fraud associated
with third-number billed calls, calling card calls, and any other services
related to this Agreement.

     21.6 At all times during the term of this Agreement, each Party shall keep
and maintain in force at each Party's expense all insurance required by law
(e.g. workers' compensation insurance) as well as general liability insurance
for personal injury or death to any one person, property damage resulting from
any one incident, automobile liability with coverage for bodily injury for
property damage.  Upon request from the other Party, each Party shall provide
to the other Party evidence of such insurance (which may be provided through a
program of self insurance).

     21.7 In addition to its indemnity obligations under Section 26.0, each
Party shall provide, in its tariffs and contracts with its end users
that relate to any Telecommunications Service provided or contemplated under
this Agreement, that in no case shall such Party or any of its agents,
contractors or others retained by such parties be liable to any end user or
third party for (i) any Loss relating to or arising out of this Agreement,
whether in contract or tort, that exceeds the amount such Party would have
charged the applicable end user for the service(s) or function(s) that gave
rise to such Loss, and (ii) any Consequential Damages.

     21.8 Unless otherwise stated, each Party will render a monthly bill to the
other for service(s) provided hereunder.  Remittance in full will be due within
thirty (30) days of that billing date.  Interest shall apply on overdue amounts
(other than disputed amounts which are subject to Section 30.12) at the rate
specified in Section 30.12, unless otherwise specified in an 

<PAGE>   30
                                                    GENERAL TERMS AND CONDITIONS
                                                                  DTI - MISSOURI
                                                                   PAGE 25 OF 42

applicable tariff. Each Party reserves the right to net delinquent
amounts against amounts otherwise due the other.

     21.9 SWBT is participating with the industry to develop standardized
methods through the OBF and shall implement ordering and billing
formats/processes consistent with industry guidelines as capabilities are
deployed.  Where such guidelines are not available or SWBT decides not to fully
utilize industry guidelines, SWBT will provide DTI with information on its
ordering and billing format/process and requirements at the earliest
practicable time.

22.0 EFFECTIVE DATE, TERM, AND TERMINATION

     22.1 This Agreement shall be effective ten (10) days after approval by the
Missouri PSC when it has determined that the Agreement complies with Sections
251 and 252 of the Act ("Effective Date").

     22.2 The initial term of this Agreement shall be one (1) year (the "Term")
which shall commence on the Date of Execution.  Absent the receipt by one Party
of written notice from the other Party at least sixty (60) days prior to the
expiration of the Term to the effect that such Party does not intend to extend
the Term of this Agreement, this Agreement shall automatically renew and remain
in full force and effect on and after the expiration of the Term until
terminated by either Party pursuant to Section 22.3, below.

     22.3 Either Party may terminate this Agreement in the event that the other
Party fails to perform a material obligation that disrupts the operation of
either Party's network and/or end user service and fails to cure such material
nonperformance within forty-five (45) days after written notice thereof.

     22.4 If pursuant to Section 22.2, above, this Agreement continues in full
force and effect after the expiration of the Term, either Party may terminate
this Agreement ninety (90) days after delivering written notice to the other
Party of its intention to terminate this Agreement, subject to Section 22.5,
below.  Neither Party shall have any liability to the other Party for
termination of this Agreement pursuant to this Section 22.4 other than its
obligations under Section 22.5, below.

     22.5 Upon termination or expiration of this Agreement in accordance with
this Section 22.0, above:

          (a) each Party shall comply immediately with its obligations set
              forth in Section 30.6, below; and

          (b) each Party shall promptly pay all amounts (including any late
              payment charges) owed under this Agreement; and

          (c) each Party's indemnification obligations shall survive.

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                                                    GENERAL TERMS AND CONDITIONS
                                                                  DTI - MISSOURI
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     22.6 If upon expiration or termination, the Parties are negotiating a
successor agreement; during such period, each Party shall continue to perform
its obligations and provide the services described herein that are to be
included in the successor agreement until such time as the latter agreement
becomes effective; provided however, that if the Parties are unable to reach
agreement within six (6) months after termination or expiration of this
Agreement, either Party has the right to submit this matter to the Commission
for resolution.  Until a survivor agreement is reached or the Commission
resolves the matter, whichever is sooner, the terms, conditions, rates, and
charges stated herein will continue to apply, subject to a true-up based on the
Commission action, if any.

     22.7 Except as set forth in Section 28.5, below, no remedy set forth in
this Agreement is intended to be exclusive and each and every remedy shall be
cumulative and in addition to any other rights or remedies now or hereafter
existing under applicable law or otherwise.

23.0 DISCLAIMER OF REPRESENTATIONS AND WARRANTIES

     EXCEPT AS EXPRESSLY PROVIDED UNDER THIS AGREEMENT, NO PARTY MAKES OR
RECEIVES ANY WARRANTY, EXPRESS OR IMPLIED, WITH RESPECT TO THE SERVICES,
FUNCTIONS AND PRODUCTS IT PROVIDES UNDER OR CONTEMPLATED BY THIS AGREEMENT AND
THE PARTIES DISCLAIM THE IMPLIED WARRANTIES OF MERCHANTABILITY OR OF FITNESS
FOR A PARTICULAR PURPOSE.  ADDITIONALLY, NEITHER SWBT NOR DTI ASSUMES
RESPONSIBILITY WITH REGARD TO THE CORRECTNESS OF DATA OR INFORMATION SUPPLIED
BY THE OTHER WHEN THIS DATA OR INFORMATION IS ACCESSED AND USED BY A THIRD
PARTY.

24.0 CHANGES IN END USER LOCAL EXCHANGE SERVICE PROVIDER SELECTION

     Each Party will abide by applicable state or federal laws and regulations
in obtaining end user authorization prior to changing end user's local
service provider to itself and in assuming responsibility for any applicable
charges as specified in Section 258 (b) of the Telecommunications Act of 1996. 
The Parties shall make authorization available to each other upon request and
at no charge.  Only an end user can initiate a challenge to a change in its
local exchange service provider.  If an end user notifies SWBT or DTI that the
end user requests local exchange service, the Party receiving such request
shall be free to immediately provide service to such end user.  When an end
user changes or withdraws authorization, each Party shall release
customer-specific facilities in accordance with the end user's direction or the
end user's authorized agent.  Further, when an end user abandons the premise,
SWBT is free to reclaim the unbundled network element facilities for use by
another customer and is free to issue service orders required to reclaim such
facilities.

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                                                    GENERAL TERMS AND CONDITIONS
                                                                  DTI - MISSOURI
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25.0 SEVERABILITY

     25.1 The Parties negotiated the services, arrangements, Interconnection,
terms and conditions of this Agreement by the Parties as a total arrangement
and are intended to be nonseverable, subject only to Section 30.16 of this
Agreement.

     25.2 In the event the Commission, the FCC, or a court rejects any portion
or determines that any provision of this Agreement is contrary to law, or is
invalid or unenforceable for any reason, the Parties shall continue to be bound
by the terms of this Agreement, insofar as possible, except for the portion
rejected or determined to be unlawful, invalid, or unenforceable.  In such
event, the Parties shall negotiate in good faith to replace the rejected,
unlawful, invalid, or unenforceable provision and shall not discontinue service
to the other party during such period if to do so would disrupt existing
service being provided to an end user.  Nothing in this Agreement shall be
construed as requiring or permitting either Party to contravene any mandatory
requirement of federal or state law, or any regulations or orders adopted
pursuant to such law.

26.0 INTELLECTUAL PROPERTY

     LSP is responsible for obtaining any license or right to use agreement
associated with a Unbundled Network Element purchased from SWBT.  SWBT will
provide a list of all known and necessary licenses or right to use agreements
applicable to the subject Network Element(s) within seven days of a request for
such a list by LSP.  SWBT agrees to use its best efforts to facilitate the
obtaining of any necessary license or right to use agreement.  SWBT makes no
warranties, express or implied, concerning LSP's (or any third party's) rights
with respect to intellectual property (including with limitation, patent,
copyright, and trade secret rights) or contract rights associated with LSP's
rights to interconnect with SWBT's network and to Unbundled Network Elements.

27.0. INDEMNIFICATION

     27.1 Except as otherwise provided herein or in specific appendices, each
Party shall be responsible only for service(s) and facility(ies) which are
provided by that Party, its authorized agents, subcontractors, or others
retained by such parties, and neither Party shall bear any responsibility for
the service(s) and facility(ies) provided by the other Party, its agents,
subcontractors, or others retained by such parties.

     27.2 Except as otherwise provided herein or in specific appendices, and to
the extent not prohibited by law and not otherwise controlled by tariff, each
Party (the "Indemnifying Party") shall defend and indemnify the other Party
(the "Indemnified Party") and hold such Indemnified Party harmless against any
Loss to a third party arising out of the negligence or willful misconduct by
such Indemnifying Party, its agents, its end user, contractors, or others
retained by such parties, in connection with the indemnifying provision of
services or functions under this Agreement.



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                                                    GENERAL TERMS AND CONDITIONS
                                                                  DTI - MISSOURI
                                                                   PAGE 28 OF 42

     27.3 In the case of any Loss alleged or made by an end user of either
Party, the Party whose end user alleged or made such Loss (Indemnifying Party)
shall defend and indemnify the other Party (Indemnified Party) against any and
all such claims or Loss by its end users regardless of whether the underlying
service was provided or unbundled element was provisioned by the Indemnified
Party, unless the Loss was caused by the gross negligence or intentional
misconduct of the other (Indemnified) Party.

     27.4 LSP agrees to indemnify, defend and hold harmless SWBT from any Loss
arising out of SWBT's provision of 911 services or out of LSP's end users' use
of the 911 service, whether suffered, made, instituted, or asserted by LSP or
its end users, including for any personal injury or death of any person or
persons, except for Loss which is the direct result of SWBT's own negligence or
willful misconduct.

     27.5 Each Party shall be indemnified, defended and held harmless by the
other Party against any Loss arising from a Party's use of services or elements
provided under this Agreement involving: tort claims, including claims for
libel, slander, invasion of privacy, or infringement of copyright arising from
a Party's own communications or the communications of its end users.

     27.6 SWBT shall be indemnified, defended, and held harmless by the LSP for
claims for patent, trademark, infringement or other infringement or
intellectual property rights, arising from the LSP's use of services or
unbundled elements provided under this Agreement.

     27.7 The Indemnifying Party agrees to defend any suit brought against the
Indemnified Party for any Loss identified in this Section or specific
appendices.  The Indemnified Party agree to notify the Indemnifying Party
promptly in writing of any written claims, lawsuits or demands for which the
Indemnifying Party may be responsible under this Agreement.  The Indemnified
Party shall cooperate in every reasonable way to facilitate defense or
settlement.  The Indemnifying Party shall have the right to control and conduct
the defense and settlement of any action or claim subject to the consultation
of the Indemnified Party.  The Indemnifying Party shall not be responsible for
any settlement unless the Indemnifying Party approved such settlement in
advance and agrees to be bound by the settlement agreement.

28.0 LIMITATION OF LIABILITY

     28.1 Except for indemnity obligations under this Agreement, or except as
otherwise provided in specific appendices, each Party's liability to the other
Party for any Loss relating to or arising out of any negligent act or omission
in its performance under this Agreement, whether in contract or tort, shall not
exceed in total the amount SWBT or LSP has to or would have charged the other
Party for the affected service(s) or function(s) which were not performed or
were otherwise improperly performed.

<PAGE>   34

                                                    GENERAL TERMS AND CONDITIONS
                                                                  DTI - MISSOURI
                                                                   PAGE 29 OF 42

     28.2 Except for Losses alleged or made by an end user of either Party, or
except as otherwise provided in specific appendices, in the case of any Loss
alleged or made by a third party arising under the negligence or willful
misconduct of both Parties, each Party shall bear, and its obligation under
this section shall be limited to, that portion (as mutually agreed to by the
Parties) of the resulting expense caused by its own negligence or willful
misconduct or that of its agents, servants, contractors, or others acting in
aid or concert with it.

     28.3 In no event shall either Party have any liability whatsoever to the
other Party for any indirect, special, consequential, incidental, or punitive
damages, including but not limited to, loss of anticipated profits or revenue
or other economic loss in connection with or arising from anything said,
omitted, or done hereunder (collectively, "Consequential Damages"), even if the
other Party has been advised of the possibility of such damages; provided that
the foregoing shall not limit a Party's obligation under this Agreement to
indemnify, defend, and hold the other Party harmless against any amounts
payable to a third party, including any losses, costs, fines, penalties,
criminal or civil judgments or settlements, expenses (including attorney's
fees) and Consequential Damages of such third party.

29.0 LIQUIDATED DAMAGES FOR SPECIFIED ACTIVITIES

     29.1 CERTAIN DEFINITIONS.  When used in this Section 29.0, the following
terms shall have the meanings indicated:

          29.1.1 "SPECIFIED PERFORMANCE BREACH" means the failure by SWBT to 
meet the Performance Criteria for any Specified Activity for a period
of three (3) consecutive calendar months.

          29.1.2 "Specified Activity" means any of the following activities:

                 (i)   the installation by SWBT of unbundled elements 
                       associated with DTI end user Lines;

                 (ii)  SWBT's provision of Interim Number Portability; or

                 (iii) the repair of out of service problems for DTI ("Out of
                       Service Repairs").

          29.1.3 "Performance Criteria" means, with respect to each calendar
month during the term of this Agreement, the performance by SWBT during
such month of each Specified Activity shown below within the time interval
shown in at least eighty percent (80%) of the covered instances:

<PAGE>   35
                                                    GENERAL TERMS AND CONDITIONS
                                                                  DTI - MISSOURI
                                                                   PAGE 30 OF 42
                        
SPECIFIED ACTIVITY               PERFORMANCE INTERVAL DATE

(i) DTI End User Lines             

1-l0 Lines per Service Order     five (5) business days from SWBT's Receipt of
                                 valid Service Order

11-20 Lines per Service Order    ten (10) business days from SWBT's Receipt of
                                 valid Service Order

21+ Lines per Service Order      To Be Negotiated

(ii) Interim Number Portability

1-10 Numbers per Service Order   five (5) business days from SWBT's
                                 Receipt of valid Service Order

11-20 Numbers per Service Order  ten (10) business days from SWBT's Receipt of
                                 valid Service Order

21+ Numbers per Service Order    To be Negotiated

(iii) Out-of-Service Repairs     Less than twenty-four (24) hours from SWBT's
                                 Receipt of Notification of Out-of-Service
                                 Condition


     29.2 SPECIFIED PERFORMANCE BREACH.  In recognition of the: (1) loss of end
user opportunities, revenues and goodwill which DTI might sustain in the event
of a Specified Performance Breach; (2) the uncertainty, in the event of such a
Specified Performance Breach, of DTI having available to it customer
opportunities similar to those opportunities currently available to DTI; and
(3) the difficulty of accurately ascertaining the amount of damages DTI would
sustain in the event of such a Specified Performance Breach, SWBT agrees to pay
DTI, subject to Section 29.4 below, damages as set forth in Section 29.3 below
in the event of the occurrence of a Specified Performance Breach.

     29.3 LIQUIDATED DAMAGES.  The damages payable by SWBT to DTI as a result
of a Specified Performance Breach shall be $75,000 for each Specified
Performance Breach (collectively, the "Liquidated Damages").  DTI and SWBT
agree and acknowledge that: (a) the Liquidated Damages are not a penalty and
have been determined based upon the facts and circumstances of DTI and SWBT at
the time of the negotiation and entering into of this Agreement, with due
regard given to the performance expectations of each Party; (b) the Liquidated
Damages constitute a reasonable approximation of the damages DTI would sustain
if its damages were readily ascertainable; and (c) DTI shall not be required to
provide any proof of the Liquidated Damages.

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                                                    GENERAL TERMS AND CONDITIONS
                                                                  DTI - MISSOURI
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     29.4 LIMITATIONS.  In no event shall SWBT be liable to pay the Liquidated
Damages if SWBT's failure to meet or exceed any of the Performance Criteria is
caused, directly or indirectly, by a Delaying Event.  A "Delaying Event" means:
(a) a failure by DTI to perform any of its obligations set forth in this
Agreement (including, without limitation, the Implementation Schedule and the
Joint Implementation Process); (b) any delay, act or failure to act by an end
user, agent or subcontractor of DTI; (c) any Force Majeure Event; or (d) for
INP, where memory limitations in the switch in the SWBT serving office cannot
accommodate the request.  If a Delaying Event: (i) prevents SWBT from
performing a Specified Activity, then such Specified Activity shall be excluded
from the calculation of SWBT's compliance with the Performance Criteria; or
(ii) only suspends SWBT's ability to timely perform the Specified Activity, the
applicable time frame in which SWBT's compliance with the Performance Criteria
is measured shall be extended on an hour-for-hour or day-for-day basis, as
applicable, equal to the duration of the Delaying Event.

     29.5 SOLE REMEDY.  The Liquidated Damages shall be the sole and exclusive
remedy of DTI for SWBT's breach of the Performance Criteria or a Specified
Performance Breach as described in this Section 29.0 and shall be in lieu of
any other damages or credit DTI might otherwise seek for such breach of the
Performance Criteria or a Specified Performance Breach through any claim or
suit brought under any contract or tariff.

     29.6 RECORDS.  SWBT shall maintain complete and accurate records, on a
monthly basis, of its performance under this Agreement of each Specified
Activity and its compliance with the Performance Criteria.  SWBT shall provide
to DTI such records in a self-reporting format on a monthly basis.
Notwithstanding Section 31.6.1, below, the Parties agree that such records
shall be deemed "Proprietary Information" under Section 31.6, below.

30.0 REGULATORY APPROVAL

     30.1 The Parties understand and agree that this Agreement will be filed
with the Commission and may thereafter be filed with the FCC.  The Parties
believe in good faith and agree that the services to be provided under this
Agreement satisfy the specifically mentioned sections of the Act and are in the
public interest.  Each Party covenants and agrees to fully support approval of
this Agreement by the Commission or the FCC under Section 252 of the Act
without modification.

     30.2 The Parties agree that the performance of the terms of this Agreement
will satisfy SWBT's obligation to provide Interconnection under Section 251 of
the Act, and the requirements of the Competitive Checklist, under Section 271
of the Act.  DTI represents that it is, or intends to become, a provider of
Telephone Exchange Service to residential and business subscribers offered
exclusively over its own Telephone Exchange Service facilities or predominantly
over its own Telephone Exchange Service facilities in combination with the use
of unbundled Network Elements purchased from another entity and the resale of
the Telecommunications Services of other carriers.

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                                                    GENERAL TERMS AND CONDITIONS
                                                                  DTI - MISSOURI
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31.0 MISCELLANEOUS

     31.1 AUTHORIZATION.

          (a) SWBT is a corporation duly organized, validly existing and in
              good standing under the laws of the State of Missouri and has
              full power and authority to execute and deliver this Agreement
              and to perform the obligations hereunder.

          (b) DTI is a corporation duly organized, validly existing and in
              good standing under the laws of the State of Missouri and has
              full power and authority to execute and deliver this Agreement
              and to perform its obligations hereunder.

     31.2 COMPLIANCE AND CERTIFICATION.

          31.2.1 Each Party shall comply with all federal, state, and local 
laws, rules, and regulations applicable to its performance under this
Agreement.

          31.2.2 Each Party warrants that it has obtained all necessary state
certification required in those states in which it has ordered services from
the other Party pursuant to this Agreement.  Upon request by any state
governmental entity, each Party shall provide proof of certification.

          31.2.3 Each Party represents and warrants that any equipment, 
facilities or services provided to the other Party under this Agreement
comply with the Communications Law Enforcement Act ("CALEA").  Each Party shall
indemnify and hold the other Party harmless from any and all penalties imposed
upon the other Party for such noncompliance and shall at the non-compliant
Party's sole cost and expense, modify or replace any equipment, facilities or
services provided to the other Party under this Agreement to ensure that such
equipment, facilities and services fully comply with CALEA.

     31.3  LAW ENFORCEMENT.

           31.3.1  SWBT and DTI shall handle law enforcement requests as 
follows:

                   (a) Intercept Devices: Local and federal law enforcement
                       agencies periodically request information or assistance
                       from local telephone service providers.  When either
                       Party receives a request associated with an end user of
                       the other Party, it shall refer such request to the
                       Party that serves such end user, unless the request
                       directs the receiving Party to attach a pen register,
                       trap-and-trace or form of intercept on the Party's
                       facilities, in which case that Party shall comply with
                       any valid request.

<PAGE>   38
                                                    GENERAL TERMS AND CONDITIONS
                                                                  DTI - MISSOURI
                                                                   PAGE 33 OF 42
        
                   (b) Subpoenas: If a Party receives a subpoena for information
                       concerning an end user the Party knows to be an end
                       user of the other Party, it shall refer the subpoena to
                       the requesting party with an indication that the other
                       Party is the responsible company, unless the subpoena
                       requests records for a period of time during which the
                       Party was the end user's service provider, in which case
                       the Party will respond to any valid request.

                   (c) Emergencies: If a Party receives a request from a law
                       enforcement agency for temporary number change,
                       temporary disconnect, or one-way denial of outbound
                       calls for an end user of the other Party by the
                       receiving Party's switch, that Party will comply with an
                       valid emergency request.  However, neither Party shall
                       be held liable for any claims or damages arising from
                       compliance with such requests on behalf of the other
                       Party's end user and the Party serving such end user
                       agrees to indemnify and hold the other Party harmless
                       against any and all such claims.

     31.4 INDEPENDENT CONTRACTOR.  Each Party and each Party's contractor shall
be solely responsible for the withholding or payment of all applicable federal,
state and local income taxes, social security taxes and other payroll taxes
with respect to its employees, as well as any taxes, contributions or other
obligations imposed by applicable state unemployment or workers' compensation
acts.  Each Party has sole authority and responsibility to hire, fire and
otherwise control its employees.

     31.5 FORCE MAJEURE.  Neither Party shall be liable for any delay or
failure in performance of any part of this Agreement from any cause
beyond its control and without its fault or negligence including, without
limitation, acts of nature, acts of civil or military authority, government
regulations, embargoes, epidemics, terrorist acts, riots, insurrections, fires,
explosions, earthquakes, nuclear accidents, floods, work stoppages, equipment
failure, cable cuts, power blackouts, volcanic action, other major
environmental disturbances, unusually severe weather conditions, inability to
secure products or services of other persons or transportation facilities or
acts or omissions of transportation carriers In such event, the Party affected
shall, upon giving prompt notice to the other Party, be excused from such
performance on a day-to-day basis to the extent of such interference (and the
other Party shall likewise be excused from performance of its obligations on a
day-for-day basis to the extent such Party's obligations related to the
performance so interfered with).  The affected Party shall use its best efforts
to avoid or remove the cause of nonperformance and both Parties shall proceed
to perform with dispatch once the causes are removed or cease.

<PAGE>   39

                                                    GENERAL TERMS AND CONDITIONS
                                                                  DTI - MISSOURI
                                                                   PAGE 34 OF 42

31.6 CONFIDENTIALITY.

     31.6.1 All information, including but not limited to specifications,
microfilm, photocopies, magnetic disks, magnetic tapes, drawings, sketches,
models, samples, tools, technical information, data, employee records, maps,
financial reports, and market data; (i) furnished by one Party (the "Disclosing
Party") to the other Party (the "Receiving Party") dealing with
customer-specific, facility-specific, or usage-specific information, other than
customer information communicated for the purpose of publication or directory
database inclusion, 911, call processing, billing or settlement or as otherwise
mutually agreed upon; or (ii) in written, graphic, electromagnetic, or other
tangible form and marked at the time of delivery as "Confidential" or
"Proprietary;" or (iii) communicated orally and declared to the Receiving Party
at the time of delivery, or by written notice given to the Receiving Party
within ten (10) days after declaration to be "Confidential" or "Proprietary"
(collectively referred to as "Proprietary Information"), shall remain the
property of the Disclosing Party.

     31.6.2 Upon request by the Disclosing Party, the Receiving Party shall
return all tangible copies of Proprietary Information, whether written,
graphic, or otherwise.  In the event of the expiration or termination of this
Agreement for any reason whatsoever, each Party shall return to the other Party
or destroy all Proprietary Information and other documents, work papers and
other material (including all copies thereof) obtained from the other Party in
connection with this Agreement.

     31.6.3 Each Party shall keep all the other Party's Proprietary Information
confidential in the same manner in which it keeps its own Proprietary
Information confidential, and shall use the other Party's Proprietary
Information only for performing the covenants contained in the Agreement and
shall disclose such Proprietary Information only to those employees,
contractors, agents or Affiliates who have a need to know.  Neither Party shall
use the other Party's Proprietary Information for any other purpose except upon
such terms and conditions as may be agreed upon between the Parties in writing.

     31.6.4 Unless otherwise agreed, the obligations of confidentiality and
nonuse set forth in the Agreement do not apply to such Proprietary Information
that:

     (a) was at the time of receipt, already known to the Receiving
         Party, free of any obligation to keep confidential and evidenced by
         written records prepared prior to delivery by the Disclosing Party;

     (b) is, or becomes publicly known through no wrongful act of the 
         receiving Party;

     (c) is rightfully received from a third person having no
         direct or indirect secrecy or confidentiality obligation to the
         Disclosing Party with respect to such information;

<PAGE>   40
   
                                                    GENERAL TERMS AND CONDITIONS
                                                                  DTI - MISSOURI
                                                                   PAGE 35 OF 42

     (d) is independently developed by an employee, agent, or
         contractor of the Receiving Party which individual is not
         involved in any manner with the provision of services pursuant to the
         Agreement and does not have any direct or indirect access to the
         Proprietary Information;

     (e) is disclosed to a third person by the Disclosing Party
         without similar restrictions on such third person's rights;

     (f) is approved for release by written authorization of the Disclosing 
         Party;

     (g) is required to be made public by the Receiving Party
         pursuant to applicable law or regulation provided that the
         Receiving party shall provide the Disclosing Party with written notice
         of such requirement as soon as possible and prior to such disclosure. 
         The Disclosing Party may then either seek appropriate protective
         relief from all or part of such requirement or, if it fails to
         successfully do so, it shall be deemed to have waived the Receiving
         Party's compliance with Section 31.6 with respect to all or part of
         such requirement.  The Receiving Party shall use all commercially
         reasonable efforts to cooperate with the Disclosing Party in
         attempting to obtain any protective relief which such Disclosing Party
         chooses to obtain.  Notwithstanding the foregoing, SWBT shall be
         entitled to disclose confidential information on a confidential basis
         to regulatory agencies upon request for information as to SWBT's
         activities under the Act.

     31.6.5 Notwithstanding any other provision of this Agreement, the
Proprietary Information provisions of this Agreement shall apply to all
information furnished by either Party to the other in furtherance of the
purpose of this Agreement, even if furnished before the date of this Agreement.

     31.6.6 Pursuant to Section 222(b) of the Act, both parties agree to limit
their use of Proprietary Information received from the other to the permitted
purposed identified in the Act.

 31.7 GOVERNING LAW.  For all claims under this Agreement that are based
upon issues within the jurisdiction (primary or otherwise) of the FCC, the
exclusive jurisdiction and remedy for all such claims shall be as provided for
by the FCC and the Act.  For all claims under this Agreement that are based
upon issues within the jurisdiction (primary or otherwise) of the Commission,
the exclusive jurisdiction for all such claims shall be with such Commission,
and the exclusive remedy for such claims shall be as provided for by such
Commission.  In all other respects, this Agreement shall be governed by the
domestic laws of the State of Missouri without reference to conflict of law
provisions.

<PAGE>   41
                                                    GENERAL TERMS AND CONDITIONS
                                                                  DTI - MISSOURI
                                                                   PAGE 36 OF 42
   

 31.8 TAXES.

      31.8.1 Each Party purchasing services hereunder shall pay or otherwise be
responsible for all federal, state, or local sales, use, excise, gross
receipts, transaction or similar taxes, fees, or surcharges (hereinafter "Tax")
imposed on or with respect to the services provided by or to such Party, except
for any Tax on either party's corporate existence, status, or income.  Whenever
possible, these amounts shall be billed as a separate item on the invoice.  To
the extent a sale is claimed to be for resale tax exemption, the purchasing
party shall furnish the providing party a proper resale tax exemption
certificate as authorized or required by statute or regulation by the
jurisdiction providing said resale tax exemption.  Failure to timely provide
said resale tax exemption certificate will result in no exemption being
available to the purchasing Party until such time as the purchasing Party
presents a valid certification.  Failure to timely provide said resale tax
exemption certificate will result in no exemption being available to the
purchasing Party until such time as the purchasing Party presents a valid
certificate.

      31.8.2 With respect to any purchase of services, facilities or other
arrangements, if any Tax is required or permitted by applicable law to be
collected from the purchasing party by the providing party, then: (i) the
providing party shall bill the purchasing party for such Tax; (ii) the
purchasing party shall remit such Tax to the providing party; and (iii) the
providing party shall remit such collected Tax to the applicable taxing
authority.

      31.8.3 With respect to any purchase hereunder of services, facilities or
arrangements that are resold to a third party, if any Tax is imposed by
applicable law on the end user in connection with any such purchase, then: (i)
the purchasing party shall be required to impose and/or collect such Tax from
the end user; and (ii) the purchasing party shall remit such Tax to the
applicable taxing authority.  The purchasing party agrees to indemnify and hold
harmless the providing party on an after-tax basis for any costs incurred by
the providing party as a result of actions taken by the applicable taxing
authority to collect the Tax from the providing party due to the failure of the
purchasing party to pay or collect and remit such tax to such authority.

      31.8.4 If the providing party fails to collect any Tax as required herein,
then, as between the providing party and the purchasing party: (i) the
purchasing party shall remain liable for such uncollected Tax; and (ii) the
providing party shall be liable for any penalty and interest assessed with
respect to such uncollected Tax by such authority.  However, if the purchasing
party fails to pay any taxes properly billed, then, as between the providing
party and the purchasing party, the purchasing party will be solely responsible
for payment of the taxes, penalty and interest.

      31.8.5 If the purchasing party fails to impose and/or collect any Tax from
end users as required herein, then, as between the providing party and the
purchasing party, the purchasing party shall remain liable for such uncollected
Tax and any interest and penalty assessed thereon with respect to the
uncollected Tax by the applicable taxing authority.  With 

<PAGE>   42
                                                    GENERAL TERMS AND CONDITIONS
                                                                  DTI - MISSOURI
                                                                   PAGE 37 OF 42

respect to any Tax that the purchasing party has agreed to pay or
impose on and/or collect from end users, the purchasing party agrees to
indemnify and hold harmless the providing party on an after-tax basis for any
costs incurred by the providing party as a result of actions taken by the
applicable taxing authority to collect the Tax from the providing Party due to
the failure of the purchasing party to pay or collect and remit such Tax to
such authority.               

     31.9 NON-ASSIGNMENT.  This Agreement shall be binding upon every
subsidiary and Affiliate of either Party that is engaged in providing Telephone
Exchange and Exchange Access services in any territory within which SWBT is an
Incumbent Local Exchange Carrier as of the date of this Agreement (the "SWBT
Territory") and shall continue to be binding upon all such entities regardless
of any subsequent change in their ownership.  Each Party covenants that, if it
sells or otherwise transfers to a third party its Telephone Exchange and
Exchange Access network facilities within the SWBT Territory, or any portion
thereof, to a third party, it will require as a condition of such transfer that
the transferee agree to be bound by this Agreement with respect to services
provided over the transferred facilities.  Except as provided in this
paragraph, neither Party may assign or transfer (whether by operation of law or
otherwise) this Agreement (or any rights or obligations hereunder) to a third
party without the prior written consent of the other Party; provided that each
Party may assign this Agreement to a corporate Affiliate or an entity under its
common control or an entity acquiring all or substantially all of its assets or
equity by providing prompt written notice to the other Party of such assignment
or transfer.  Any attempted assignment or transfer that is not permitted is
void ab initio.  Without limiting the generality of the foregoing, this
Agreement shall be binding upon and shall inure to the benefit of the Parties'
respective successors and assigns.

     31.10 NON-WAIVER.  Failure of either Party to insist on performance of any
term or condition of this Agreement or to exercise any right or privilege
hereunder shall not be construed as a continuing or future waiver of such term,
condition, right or privilege.

     31.11 AUDITS.  Each Party to this Agreement will be responsible for the
accuracy and quality of its data as submitted to the respective Parties
involved.

           31.11.1 Upon reasonable written notice and at its own expense, each
Party or its authorized representative (providing such authorized
representative does not have a conflict of interest related to other matters
before one of the Parties) shall have the right to conduct an audit of the
other Party to give assurances of compliance with the provisions of this
Agreement; provided, that neither Party may request more than two (2) such
audits within any twelve (12) month period.  This includes on-site audits at
the other Party's or the Party's vendor locations.  Each Party, whether or not
in connection with an audit, shall maintain reasonable records for a minimum of
twenty-four (24) months and provide the other Party with reasonable access to
such information as is necessary to determine amounts receivable or payable
under this Agreement. Each Party's right to access information for audit
purposes is limited to data not in excess of twenty-four (24) months in age.

<PAGE>   43

                                                    GENERAL TERMS AND CONDITIONS
                                                                  DTI - MISSOURI
                                                                   PAGE 38 OF 42

 31.12 DISPUTED AMOUNTS.

       31.12.1 No claims, under this Agreement or its Appendices, shall be
brought for disputed amounts more than twenty-four (24) months from the
date of occurrence which gives rise to the dispute.  Under this Section 30.12,
if any portion of an amount due to a Party (the "Billing Party") under this
Agreement is subject to a bona fide dispute between the Parties, the Party
billed (the "Non-Paying Party") shall within sixty (60) days of its receipt of
the invoice containing such disputed amount give notice to the Billing Party of
the amounts it disputes ("Disputed Amounts") and include in such notice the
specific details and reasons for disputing each item.  The Non-Paying Party
shall pay when due: (i) all undisputed amounts to the Billing Party; and (ii)
all Disputed Amounts to Billing Party.

       31.12.2 If the Parties are unable to resolve the issues related to the
Disputed Amounts in the normal course of business within sixty (60) days after
delivery to the Billing Party of notice of the Disputed Amounts, each of the
Parties shall appoint a designated representative who has authority to settle
the dispute and who is at a higher level of management than the persons with
direct responsibility for administration of this Agreement.  The designated
representatives shall meet as often as they reasonably deem necessary in order
to discuss the dispute and negotiate in good faith in an effort to resolve such
dispute.

       31.12.3 If the Parties are unable to resolve issues related to the
Disputed Amounts within forty-five (45) days after the Parties' appointment of
designated representatives pursuant to Section 31.12.2, above, then either
Party may file a complaint with the Commission to resolve such issues or
proceed with any other remedy pursuant to law or equity.  The Commission may
direct release of any or all funds (including any accrued interest) in the
escrow account, plus applicable late fees, to be paid to either Party.

       31.12.4 The Parties agree that all negotiations pursuant to this Section
31.12 shall remain confidential and shall be treated as compromise and
settlement negotiations for purposes of the Federal Rules of Evidence and state
rules of evidence.

       31.12.5 Any undisputed amounts not paid when due shall accrue interest
from the date such amounts were due at the lesser of: (i) one and one-half
percent (1-1/2%) per month; or (ii) the highest rate of interest that may be
charged under applicable law.

 31.13 DISPUTE RESOLUTION.

       31.13.1 No claims shall be brought for disputes arising under this
Agreement or its Appendices more than twenty-four (24) months from the date of
occurrence which gives rise to the dispute.

       31.13.2 For disputes other than disputed amounts under this Agreement or
its Appendices, each Party shall appoint a designated representative as set
forth in Section 31.12.2, above, and if unable to resolve the dispute, proceed
as set forth in Section 31.12.3, above.

<PAGE>   44
                                                    GENERAL TERMS AND CONDITIONS
                                                                  DTI - MISSOURI
                                                                   PAGE 39 OF 42

     31.14 NOTICES.  Any notice to a Party required or permitted under this
Agreement shall be in writing and shall be deemed to have been received
on the date of service if served personally; on the date receipt is
acknowledged in writing by the recipient if delivered by regular mail; or on
the date stated on the receipt if delivered by certified or registered mail or
by a courier service that obtains a written receipt.  Notice may also be
provided by facsimile, which shall be effective on the next Business Day
following the date of transmission as reflected in the facsimile confirmation
sheet.  "Business Day" shall mean Monday through Friday, SWBT/DTI holidays
excepted.  Any notice shall be delivered using one of the alternatives
mentioned in this section and shall be directed to the applicable address
indicated below or such address as the Party to be notified has designated by
giving notice in compliance with this section, except that notices to a Party's
twenty-four (24) hour contact number shall be by telephone and/or facsimile and
shall be deemed to have been received on the date transmitted.


NOTICE CONTACT                DTI CONTACT               SWBT CONTACT
NAME/TITLE                    Richard Weinstein         Jeffrey Fields
STREET ADDRESS                11111 Dorsett Rd.         One Bell Plaza, 525.07
CITY, STATE, ZIP CODE         St. Louis, MO 63043       Dallas, TX 75202
TELEPHONE NUMBER              314-253-6600              214-464-5676
FAX NUMBER                    314-253-6699              214-464-1486

24-HOUR NETWORK MGMT CONTACT  DTI CONTACT               SWBT CONTACT
NAME/TITLE                    Alan Ducheck              NSMC Control
TELEPHONE NUMBER              314-253-6600              1-800-792-2662
FAX NUMBER                    314-253-6699              1-972-301-6702

 31.15 PUBLICITY AND USE OF TRADEMARKS OR SERVICE MARKS.

       31.15.1 The Parties agree not to use in any advertising or sales
promotion, press releases, or other publicity matters any endorsements, direct
or indirect quotes, or pictures implying endorsement by the other Party or any
of its employees without such Party's prior written approval.  The Parties will
submit to each other for written approval, prior to publication, all publicity
matters that mention or display one another's name and/or marks or contain
language from which a connection to said name and/or marks may be inferred or
implied; the Party to whom a request is directed shall respond promptly.
Nothing herein, however, shall be construed as preventing either Party from
publicly stating the fact that it has executed this Agreement with the other
Party.

     31.15.2 Nothing in this Agreement shall grant, suggest, or imply any
authority for one Party to use the name, trademarks, service marks, or trade
names of the other for commercial purposes without prior written approval.

<PAGE>   45

                                                    GENERAL TERMS AND CONDITIONS
                                                                  DTI - MISSOURI
                                                                   PAGE 40 OF 42

     31.16 SECTION 252(I) OBLIGATIONS.  If either Party enters into an
agreement (the "Other Agreement") approved by the Commission or FCC pursuant to
Section 252 of the Act (regardless of whether the approved agreement was
negotiated or arbitrated) which provides for the provision of arrangements
covered in this Agreement to another requesting Telecommunications Carrier,
including an Affiliate, such Party shall make available to the other Party such
arrangements upon the same rates, terms and conditions as those provided in the
Other Agreement.  At its sole option, the other Party may avail itself of
either: (i) the Other Agreement in its entirety; or (ii) the prices, terms and
conditions of the Other Agreement that directly relate to any of the following
duties as a whole:

     (a) Interconnection - Section 251(c)(2); 252(d)(1); and 271(c)(2)(B(i) of
         the Act; or

     (b) Exchange Access - Section 251(c)(2) and 271(c)(2)(B)(ii) of the Act;
         or

     (c) Unbundling - Section 251(c)(3) and 271(c)(2)(B)(ii) of the Act; or

     (d) Resale - Section 251(c)(4) and 271(c)(2)(B)(xiv) of the Act; or

     (e) Collocation - Section 251(c)(6) and 271(c)(2)(B)(i) of the Act; or

     (f) Number Portability - Section 251(b)(2) and 271(c)(2)(B)(xi) of the
         Act; or

     (g) Database Access - Section 271(c)(2)(B)(x) of the Act; or

     (h) Access to Rights of Way - Section 251(b)(4) and 271(c)(2)(B)(iii) of
         the Act; or

     (i) Operator Services - Section 271(c)(2)(B)(vii)(III); or

     (j) Directory Assistance - Section 271(c)(2)(B)(vii)(II).

     31.17 JOINT WORK PRODUCT.  This Agreement is the joint work product of the
Parties and has been negotiated by the Parties and their respective counsel and
shall be fairly interpreted in accordance with its terms and, in the event of
any ambiguities, no inferences shall be drawn against either Party.

     31.18 INTERVENING LAW.  This Agreement is entered into as a result of both
private negotiation between the Parties and the incorporation of some of the
results of arbitration by the Missouri PSC.  If the actions of Missouri or
federal legislative bodies, courts, or regulatory agencies of competent
jurisdiction invalidate, modify, or stay the enforcement of laws or regulations
that were the basis for a provision of the contract which is reflective of the
Arbitration Award approved by the Commission, the affected provision shall be
invalidated, modified, or stayed, consistent with the action of the legislative
body, court, or regulatory agency.  In such event, the Parties shall expend
diligent efforts to arrive at an agreement respecting the modifications to the
Agreement.  If negotiations fail, disputes between the Parties 

<PAGE>   46

                                                    GENERAL TERMS AND CONDITIONS
                                                                  DTI - MISSOURI
                                                                   PAGE 41 OF 42

concerning the interpretation of the actions required or provisions
affected by such governmental actions shall be resolved pursuant to the dispute
resolution process provided for in this Agreement.  The invalidation, stay, or
modification of the pricing provisions of the FCC's First Report and Order in
CC Docket No. 96-98 (August 8, 1996) and the FCC's Order on Reconsideration
(September 27, 1996) shall not be considered an invalidation, stay, or
modification requiring changes to provisions of the Agreement required by the
Commission Arbitration Award, in that the FCC's pricing provisions are not the
basis for the costing and pricing provisions of the Commission's Arbitration
Award.

     31.19 NO THIRD PARTY BENEFICIARIES; DISCLAIMER OF AGENCY.  This Agreement
is for the sole benefit of the Parties and their permitted assigns, and nothing
herein express or implied shall create or be construed to create any
third-party beneficiary rights hereunder.  Except for provisions herein
expressly authorizing a Party to act for another, nothing in this Agreement
shall constitute a Party as a legal representative or agent of the other Party,
nor shall a Party have the right or authority to assume, create or incur any
liability or any obligation of any kind, express or implied, against or in the
name or on behalf of the other Party unless otherwise expressly permitted by
such other Party.  Except as otherwise expressly provided in this Agreement, no
Party undertakes to perform any obligation of the other Party, whether
regulatory or contractual, or to assume any responsibility for the management
of the other Party's business.

     31.20 NO LICENSE.  No license under patents, copyrights or any other
intellectual property right (other than the limited license to use consistent
with the terms, conditions and restrictions of this Agreement) is granted by
either Party or shall be implied or arise by estoppel with respect to any
transactions contemplated under this Agreement.

     31.21 SURVIVAL.  The Parties' obligations under this Agreement which by
their nature are intended to continue beyond the termination or expiration of
this Agreement shall survive the termination or expiration of this Agreement.

     31.23 SCOPE OF AGREEMENT.  This Agreement is intended to describe and
enable specific Interconnection and compensation arrangements between the
Parties.  This Agreement does not obligate either Party to provide arrangements
not specifically provided herein.

     31.24 ENTIRE AGREEMENT.  The terms contained in this Agreement and any
Schedules, Exhibits, Appendices, tariffs and other documents or instruments
referred to herein, which are incorporated into this Agreement by this
reference, constitute the entire agreement between the Parties with respect to
the subject matter hereof, superseding all prior understandings, proposals and
other communications, oral or written.  Neither Party shall be bound by any
preprinted terms additional to or different from those in this Agreement that
may appear subsequently in the other Party's form documents, purchase orders,
quotations, acknowledgments, invoices or other communications.  This Agreement
may only be modified by a writing signed by an officer of each Party.

<PAGE>   47
                                                    GENERAL TERMS AND CONDITIONS
                                                                  DTI - MISSOURI
                                                                   PAGE 42 OF 42

IN WITNESS WHEREOF, the Parties hereto have caused this Agreement to be
executed as of this 1st day of July, 1997.

DIGITAL TELEPORT, INC.               SOUTHWESTERN BELL TELEPHONE COMPANY

Signature: /s/ Richard D. Weinstein  Signature: /s/ Dennis B. Eidson
          --------------------------           ---------------------------------


Name:  RICHARD D. WEINSTEIN          Name: DENNIS B. EIDSON
     -------------------------------      --------------------------------------
       (Print or Type)                         (Print or Type)

Title: PRESIDENT                    Title: Gen. Mgr.-Local Interconnection
      ------------------------------       -------------------------------------
       (Print or Type)                         (Print or Type)





<PAGE>   48
                                                                    APPENDIX 800
                                                                     Page 2 of 6

                                  APPENDIX 800

                    ACCESS TO THE TOLL FREE CALLING DATABASE

This Appendix sets forth the terms and conditions under which SWBT provides
Access to the Toll Free Calling Database.

I.    DESCRIPTION

      A.   SWBT's 800 database, an ANSI SS7 call-related database
           system, receives updates processed from the national Service
           Management System (SMS).  Customer records in the SMS are created or
           modified by entities known as Responsible Organizations (RespOrg)
           who obtain access to the SMS via the 800 Service Management System,
           Tariff F.C.C. No. 1.  800 Service Providers must either become their
           own RespOrg or use the services of an established RespOrg.  The
           services of a RespOrg includes creating and updating 800 records in
           the SMS to download in the 800 database(s).  SWBT does not, either
           through a tariff or contract, provide RespOrg service.

      B.   After the 800 customer record is created in the SMS, the SMS
           downloads the records to the appropriate databases, depending on the
           area of service chosen by the 800 subscriber.  An 800 customer
           record is created in the SMS for each 800 number to be activated.
           The SMS initiates all routing changes to update information on a
           nationwide basis.

      C.   Access to the Toll Free Calling Database allows an LSP to
           access SWBT's 800 database for the purpose of switch query and
           database response.  Access to the Toll Free Calling Database
           supports the processing of toll free calls (e.g., 800 and 888) where
           identification of the appropriate carrier (800 Service Provider) to
           transport the call is dependent upon the full ten digits of the toll
           free number (e.g., 1+800+NXX+XXXX).  Access to the Toll Free Calling
           Database includes all 800-type dialing plans (i.e., 800 and 888 [and
           877, 866, 855, 844, 833, 822, when available]).

      D.   Access to the Toll Free Calling Database provides the carrier
           identification function required to determine the appropriate
           routing of an 800 number based on the geographic origination of the
           call, from a specific or any combination of NPA/NXX, NPA or LATA.

      E.   There are three optional features available with 800 service:
           Designated 10-Digit Translation, Call Validation and Call Handling
           and Destination.

           1.   The Designated 10-Digit Translation feature
                converts the 800 number into a designated 10-digit number.
                If the 800 Service Provider provides the designated 10-digit
                number associated with the 800 number and requests 


<PAGE>   49
                                                                    APPENDIX 800
                                                                     Page 3 of 6

                delivery of the designated 10-digit number in place of
                the 800 number, SWBT will deliver the designated 10-digit
                number.          

           2.   The Call Validation feature limits calls to an
                800 number to calls originating only from an 800 Subscriber's
                customized service area.  Calls originating outside the area
                will be screened and an out of band recording will be
                returned to the calling party.

           3.   The Call Handling and Destination feature allows routing of 
                800 calls based on one or any combination of the following:  
                time of day, day of week, percent allocation and specific 10 
                digit ANI.

II. TERMS AND CONDITIONS

    A.   Access to the Toll Free Calling Database provided under these
         terms and conditions is only available for use in the provision of
         telephone exchange and exchange access telecommunications services
         as specified in the Telecommunications Act of 1996 and any effective
         rules and regulations of the Federal Communications Commission and
         the state Public Service Commission.
    
    B.   Access to the Toll Free Calling Database is offered separate
         and apart from other unbundled network elements necessary for
         operation of the network routing function addressed in these terms
         and conditions, e.g., end office 800 SSP functionality and CCS/SS7
         signaling.  This appendix is separate from the prices, terms,
         conditions and billing for such related elements, and in no way
         shall this appendix be construed to circumvent the prices, terms,
         conditions or billing as specified for such related elements.
    
    C.   LSP shall address its queries to SWBT's database to the alias
         point code of the STP pair identified by SWBT.  LSP's queries shall
         use subsystem number 0 in the calling party address field and a
         translations type of 254 with a routing indicator set to route on
         global title.  LSP acknowledges that such subsystem number and
         translation type values are necessary for SWBT to properly process
         queries to its 800 database.
    
    D.   Each Party warrants to the other that it shall send queries
         and SS7 messages conforming to the ANSI approved standards for SS7
         protocol and pursuant to the Specifications and Standards documents
         attached and incorporated herein in Exhibit I.  Both Parties
         acknowledge that transmission in said protocol is necessary for each
         Party to provision Access to the Toll Free Calling Database (or the
         equivalent thereof).  Each Party reserves the right to modify its
         network pursuant to other specifications and standards, which may
         include Bellcore Specifications defining specific service
         applications, message types and formats, that may become necessary
         to meet the prevailing demands within the U.S. telecommunications
         industry.  All such changes shall be announced in accordance 

<PAGE>   50
                                                                    APPENDIX 800
                                                                     Page 4 of 6
  
         with the then prevailing industry standard procedures.  Each
         party shall work cooperatively to coordinate any necessary changes.
    
    E.   LSP acknowledges and agrees that CCS/SS7 network overload due
         to extraordinary volumes of queries and/or other SS7 network
         messages can and will have a detrimental effect on the performance
         of SWBT's CCS/SS7 network and its 800 database.  LSP further agrees
         that SWBT, at its sole discretion, may employ certain automatic
         and/or manual overload controls within SWBT's CCS/SS7 network to
         guard against these detrimental effects.  SWBT shall report to the
         LSP any instances where overload controls are invoked due to the
         LSP's CCS/SS7 network.  LSP shall take immediate, corrective actions
         as are necessary to cure the conditions causing the overload
         situation.
    
    F.   During periods of 800 database system congestion, SWBT shall
         utilize an automatic code gapping procedure to control
         congestion that may affect the service of all customers of SWBT's 800
         database. The automatic code gapping procedure used by SWBT shall tell
         LSP's switch the gap (how long LSP's switch should wait before sending
         another query) and the duration (how long the switch should continue
         to perform gapping).  For example, during an overload condition, the
         automatic code gapping procedure shall tell SWBT's 800 database when
         to begin to drop one out of three queries received.  This code gapping
         procedure shall be applied uniformly to all users of SWBT's 800
         database.  SWBT reserves the right to manually invoke the automatic
         code gapping procedure to control congestion.

    G.   Prior to SWBT initiating service under this Appendix, LSP
         shall provide an initial forecast of busy hour query volumes.  LSP
         shall update its busy hour forecast for each upcoming calendar year
         (January - December) by October 1 of the preceding year.  LSP shall
         provide such updates each year for the first three (3) years of this
         Appendix.  If, prior to the establishment of a mutually agreeable
         service effective date, in writing, SWB, at its discretion,
         determines that it lacks adequate processing capability to provide
         Access to the Toll Free Calling Database to LSP, SWBT shall notify
         LSP of SWBT's intent not to provide the services under this Appendix
         and this Appendix will be void and have no further effect.
    
    H.   LSP shall from time to time at SWBT's request, provide
         additional forecasted information as deemed necessary by SWBT for
         network planning in connection with this offering.
    
    I.   SWBT shall test the Access to the Toll Free Calling Database
         in conjunction with CCS/SS7 Interconnection Service (e.g., SS7
         Appendix) as outlined in Bellcore Technical References
         TR-NWT-000533, TR-NWT-000954, TR-TSV-000905, and TP 76638.
    


<PAGE>   51
                                                                    APPENDIX 800
                                                                     Page 5 of 6

      J.   LSP shall only use Access to the Toll Free Calling Database
           to determine the routing requirements for originating 800 calls.
           Neither the LSP nor carrier customers of the LSP if the LSP is
           acting on behalf of other carriers, shall use the database
           information to copy, store, maintain or create any table or database
           of any kind or for any purpose.  If the LSP acts on behalf of other
           carriers to access SWBT's Toll Free Calling Database, LSP shall
           prohibit such carriers from copying, storing, maintaining, or
           creating any table or database of any kind from any response
           provided by SWBT after a query to SWBT's Toll Free Calling Database.
           LSP shall only use this network element in connection with the
           provision of telephone exchange and exchange access services.

      K.   LSP shall ensure that it has sufficient link capacity and
           related facilities to handle its signaling and toll free traffic
           without adversely affecting other network subscribers.

      L.   SWBT shall provide Access to the Toll Free Calling Database
           as set forth in this Appendix only as such elements are used for
           LSP's activities on behalf of its Missouri local service customers
           where SWBT is the incumbent local exchange carrier.  LSP agrees that
           any other use of SWBT's Toll Free Calling Database for the provision
           of 800 database service by LSP will be pursuant to the terms,
           conditions, rates, and charges of SWBT's effective tariffs, as
           revised, for 800 database services.

      M.   This Appendix shall become effective on ____ and shall continue
           for one (1) year from the effective date of implementation of Access
           to the Toll Free Calling Database.  Thereafter, this Appendix shall
           remain in effect unless terminated by either party upon written
           notice given sixty (60) days in advance of the termination date.

      N.   Ordering and billing inquiries for the elements described
           herein shall be directed to the Local Service Provider Service
           Center (LSPSC).  Ordering shall be done through the LSPSC using the
           standard LSP order form and SWBT CCS7-2 Form, if applicable.

III. RATE REGULATIONS

      A.   LSP shall pay a Local Service Order Request Charge for each
           LSP request for service order activity to establish Access to the
           Toll Free Calling Database.

      B.   LSP shall pay the rates for Access to the Toll Free Calling
           Database, as described in Section III D.  These rates and charges
           will apply for one (1) year from the service effective date for each
           exchange.  After one (1) year, SWBT may change the rates upon sixty
           (60) days' notice.  SWBT may first give such notice sixty days
           before the end of the first year.



<PAGE>   52

                                                                    APPENDIX 800
                                                                     Page 6 of 6


      C.   LSP shall pay a nonrecurring charge when an LSP establishes
           or changes a signaling point code.  The rates and charges for
           Signaling Point Code(s) are described in the SS7 Appendix.  This
           charge also applies to point code information provided by LSPs
           allowing other telecommunications providers to use the LSP's SS7
           signaling network.

      D.   Prices for the four rate elements associated with Access to
           the Toll Free Calling Database are as follows:

         1.   Toll Free Database Query Rate Element          $0.001020
         2.   Designated 10-Digit Translation Rate Element      NC
         3.   Call Validation Rate Element                      NC
         4.   Call Handling and Destination Rate Element     $0.000140

      E.   LSP shall pay the Toll Free Database query rate for each
           query received and processed by SWB's database.  When applicable,
           the charge for the additional features (Designated 10-Digit
           Translation, Call Validation and Call Handling and Destination) are
           per query and in addition to the Toll Free Database query charge,
           and will also be paid by LSP.

IV. MONTHLY BILLING

      SWBT shall render monthly billing statements to the LSP, and remittance
      in full will be due within thirty (30) days of receipt.


<PAGE>   53




                                                                    APPENDIX 800
                                                                       EXHIBIT I
                                                                     Page 1 of 1

                                  APPENDIX 800
                                   EXHIBIT I

                          SPECIFICATIONS AND STANDARDS

<TABLE>
<CAPTION>
 
        Description of Subject Area
        and Issuing Organization                        Document Number
        ----------------------------------------------  ---------------
       <S>                                             <C>
        Bellcore, SS7 Specifications
                                                        TR-NWT-000246
                                                        TR-NWT-000271
                                                        TR-NWT-000533
        Bellcore, CCS Network Interface Specifications
                                                        TR-TSV-000905
                                                        TP 76638
                                                        TR-NWT-000954
</TABLE>



<PAGE>   54



                                                               APPENDIX 911-MOKA
                                                                     Page 2 of 3
                             Appendix 911- MISSOURI

                 Terms and Conditions for Providing Connection
                   to E911 Universal Emergency Number Service

This appendix between SWBT and LSP sets forth the terms and conditions upon
which SWBT will provide LSP's connection to E911 Universal Emergency Number
Service.

DEFINITIONS

The definition of IEC in the Missouri General Exchange Tariff referenced below
is modified as follows (modifications are shown in bold and italicized):

      Independent Exchange Company (IEC):  A local exchange telephone company,
      including local service providers (LSPS) who are certified by the state
      commission, other than Southwestern Bell Telephone Company.

TERMS AND CONDITIONS

The following are in addition to those terms and conditions in the Missouri
General Exchange Tariffs referenced below:

      SWBT shall provide LSP with a file containing the Master Street Address
      Guide (MSAG) for the exchanges or communities specified in Exhibit I, in
      accordance with the methods and procedures described in the document
      "Operating Methods for Downloading and Maintaining End User Records in
      SWBT's DBMS".  SWBT shall provide LSP additional files with the entire
      MSAG, including subsequent additions or updates to the MSAG in accordance
      with the intervals specified in Exhibit I.  In addition, SWBT shall
      provide LSP with a statistical report in a timely fashion and in
      accordance with the methods and procedures described in the above
      mentioned document, for each file downloaded by LSP to SWBT's DBMS, so
      that LSP may ensure the accuracy of the end user records.  LSP will
      attest it has been provided a copy of the document referenced above.

      At a reasonable time prior to the establishment of E911 Service, LSP
      shall download and maintain thereafter all information required to
      establish records necessary for furnishing connection to E911 Service and
      shall promptly notify SWBT in writing of any changes to be made to such
      records.  LSP shall adopt and comply with operating methods applicable to
      downloading and maintaining LSP's end user records in SWBT's DBMS, as set
      forth in the document referenced in the paragraph above.




<PAGE>   55
                                                             APPENDIX 911 - MOKA
                                                                     Page 3 of 3

      LSP acknowledges that its end users in a single local calling scope may
      be served by different PSAPs, and LSP shall be responsible for providing
      facilities to route calls from its end users to the proper E911 Control
      Office(s).

      LSP shall connect its switches to the E911 Control Office by one-way
      outgoing CAMA trunks dedicated for originating 911 emergency service
      calls.

      The parties agree that the E911 service is provided for the use of the
      E911 Customer, and recognizes the authority of the E911 Customer to
      establish service specifications and grant final approval (or denial) of
      service configurations offered by SWBT and the LSP.  The terms and
      conditions of this appendix represent a plan for providing E911 service,
      for which LSP must obtain documentation of approval from the appropriate
      E911 Customer(s) which have jurisdiction in the area(s) in which LSP's
      customers are located.  LSP shall provide such documentation to SWBT
      prior to the use of LSP's E911 connection for actual emergency calls.

      Both parties agree to designate a representative who shall have the
      authority to execute additional exhibits to this Appendix when necessary
      to accommodate expansion of the geographic area of LSP into the
      jurisdiction of additional PSAPs or to increase the number of CAMA
      trunks.  The designated representative for SWBT is Jeff Fields and for
      LSP is Richard Weinstein.

      The terms and conditions of this appendix are subject to renegotiation in
      the event that the E911 Customer orders changes to the E911 service that
      necessitate revision of this appendix.

RATES, TERMS AND CONDITIONS

E911 Universal Emergency Number Service will be provided utilizing the rates,
terms and conditions set forth in the following Missouri tariff, in addition to
those terms and conditions described previously in this Appendix:

      SWBT's General Exchange Tariff (Mo. P.S.C. No. 35) Section 28 - Universal
      Emergency Number Service (9-1-1)


<PAGE>   56
                                                             APPENDIX 911 - MOKA
                                                                       EXHIBIT I
                                                                     PAGE 1 OF 1

                          EXHIBIT I to APPENDIX 9-1-1


<TABLE>
<S><C>
                                        LSP SERVING AREA DESCRIPTION AND E9-1-1 INTERCONNECTION DETAILS

                                                      

LSP NAME & CONTACTS            LSP "OCN"              LSP Switch Name & Addr.   Switch Type                 LSP NPA/NXX(s) included
- ------------------------------------------------------------------------------------------------------------------------------------

                                                                                CLLI Code                   # 9-1-1 Trunks Requested
E9-1-1 Manager                 LSP Telco ID
                                                                                "Connect Signal" Digits(4)      "Default" PSAP

- ------------------------------------------------------------------------------------------------------------------------------------
                                                                                1-1

Database Administrator                                Estimated # of EAAs       ETST Code

- ------------------------------------------------------------------------------------------------------------------------------------
                               LSP Service Area
                               Definition:
Switch Site Contact
- ------------------------------------------------------------------------------------------------------------------------------------
                               SWBT E9-1-1 SYSTEM CONFIGURATION ASSOCIATED WITH DESIGNATED E9-1-1 CONTROL OFFICE

                                                                                                                                   
E9-1-1 CONTROL OFFICE:                                                                                                             
- -------------------------------------      PSAPs INCLUDED IN      COMMUNITY for MSAG    E9-1-1 CUSTOMER and AGENCY TYPE (see legend
           CLLI Code:                      9-1-1 SERVICE PLAN     PULL(3)               below)                                     
- -------------------------------------     -----------------------------------------------------------------------------------------
E9-1-1 Features Required:
- -------------------------------------
# of 9-1-1 Trunks from LSP:
- -------------------------------------
MSAG Update Interval:        Monthly
- -------------------------------------
FOOTNOTES:                (1)
                          (2)
                          (3)  MSAG will only include addresses within SWBT exchanges, unless specifically stated otherwise.
                          (4)  Refer to network interface specifications in Exhibit III.
- ------------------------------------------------------------------------------------------------------------------------------------
"TYPE of AGENCY" LEGEND:
         HRC = Home Rule City
         ECD = Emergency Communications District
         COG = Council of Governments or Regional Planning Commission
         GLC = General Law City
        Cnty = County with special provisions (only applies to Dallas County)
- ------------------------------------------------------------------------------------------------------------------------------------
                                                                                                                   Date Prepared
- ------------------------------------------------------------------------------------------------------------------------------------
- ------------------------------------------------------------------------------------------------------------------------------------
</TABLE>

<PAGE>   57

                                                                    APPENDIX AIN
                                                                     PAGE 2 OF 2

                                  Appendix AIN

                           AIN CALL RELATED DATABASE

AIN is a Network Architecture that uses distributed intelligence in centralized
databases to control call processing and manage network information, rather
than performing those functions at every switch.

SWBT will provide LSP access to the SWBT's Service Creation Environment (SCE)
to design, create, test and deploy AIN-based features, equivalent to the access
it provides to itself, providing that security arrangements can be made.  LSP
requests to use the SWBT SCE will be subject to request and review procedures
to be agreed upon by the Parties.

When LSP utilizes SWBT's Local Switching network element and requests SWBT to
provision such network element with a technically feasible AIN trigger, SWBT
will provide access to the appropriate AIN Call Related Database for the
purpose of invoking either an SWBT AIN feature or a LSP developed AIN feature
as per previous section.

When LSP utilizes its own local switch, SWBT will provide access to the
appropriate AIN Call Related Database for the purpose of invoking either an
SWBT AIN feature or a LSP developed AIN feature as per previous section.

SWBT will provide access to AIN Call Related databases in a nondiscriminatory
and competitively neutral manner.  Any mediation, static or dynamic, will only
provide network reliability, protection, security and network management
functions consistent with the access service provided.  Any network management
controls found necessary to protect the AIN SCP from an overload condition will
be applied based on nondiscriminatory guidelines and procedures either (1)
resident in the SWBT STP that serves the appropriate AIN SCP or (2) via manual
controls that are initiated from SWBT Network Elements.  Such management
controls will be applied to the specific problem source, where ever that source
is, including SWBT, and not to all services unless a problem source cannot be
identified.

As requested by LSP, SWBT will provide specifications and information
reasonably necessary for LSP to utilize SWBT SCE as provided above.

SWBT SCP will partition and take reasonable steps to protect LSP service logic
and data from unauthorized access, execution or other types of compromise,
where technically feasible.


<PAGE>   58


                                                                    APPENDIX BCR
                                                                     Page 2 of 5

                                  APPENDIX BCR

                       BILLING, COLLECTING AND REMITTING

This Appendix sets forth the terms and conditions that apply to those
telecommunications services for which charges are billed and collected by one
Local Exchange Carrier (LEC) or LSP but earned by another LEC; and to establish
procedures for the billing, collecting and remitting of such charges and for
compensation for the services performed in connection with the billing,
collecting and remitting of such charges.

I. DEFINITIONS

      A.   BellCore Client Company Calling Card and Third Number
           Settlement (BCC CATS) System - Nationwide system used to produce
           information reports that are used in the settlement of LEC revenues
           recorded by one BCC (or LEC) and billed to an end user of another
           BCC (or LEC) as described in accordance with the BellCore Practice
           BR 981-200-110.

      B.   Charges - the amount approved or allowed by the appropriate
           regulatory authority to be billed to an end user for any of the
           services described in Section II., rendered by a LEC to an end user.

      C.   Compensation - the amount to be paid by one Party to the
           other Party for billing, collecting and remitting of charges as set
           forth in Section IV.

      D.   IntraLATA - within a Local Access Transport Area (LATA) -
           IntraLATA messages are those messages, either intrastate or
           interstate, which originate and terminate within a LATA.  The term
           "IntraLATA messages," as used herein, shall only include those that
           qualify for the BellCore Client Company BCC CATS process.

      E.   InterLATA - between Local Access and Transport Areas (LATAs)
           as defined in the FCC's CC Docket No. 78-72.  InterLATA messages are
           those messages which originate in one LATA and terminate in a
           different LATA.  The term "InterLATA messages" as used herein, shall
           only include those that qualify for the BellCore Client Company BCC
           CATS process.

      F.   Local Exchange Carrier (LEC) - as used in this Appendix shall
           mean those Local Exchange Carriers or Local Service Providers using
           BCC CATS as a message tracking system.

      G.   Local Message - Local messages are those messages which
           originate and terminate within the area defined as the local service
           area of the station from which the message originates.
<PAGE>   59




                                                                    APPENDIX BCR
                                                                     Page 3 of 5

      H.   Revenues - the sum of all or part of the charges as defined
           above.

II. SCOPE OF APPENDIX

      This Appendix shall apply to procedures for the billing, collecting and
      remitting of revenues (and compensation to either Party for billing,
      collecting and remitting of such revenues) derived from the following
      services:

      A.   LEC-carried (traffic transported by facilities belonging to a
           LEC) local messages of the following types:

            1.   Local Message Service Charges Billed to a Calling
                 Card or to a Third Number.

            2.   Directory Assistance Calls Charged to a Calling
                 Card or to a Third Number.

            3.   Public Land Mobile Radiotelephone Transient-Unit
                 Local Message Service (Mobile Channel Usage Link Charge).

            4.   Maritime Mobile Radiotelephone Service and
                 Aviation Radiotelephone Service (Marine, Aircraft, High Speed
                 Train Radio Link Charges).

      B.   LEC-carried Interstate IntraLATA and Interstate InterLATA
           telecommunications services that qualify for and flow through the
           BCC CATS process as addressed in the BellCore Practice BR
           981-200-110, of the following types:

            1.   Interstate IntraLATA Toll Service carried by an
                 LEC and charged to a Calling Card or a Third Number.

            2.   Interstate InterLATA Toll Service carried by an
                 LEC and charged to a Calling Card or a Third Number.

            3.   Radio Link Charges where service is provided by
                 one LEC and billed by another LEC.

III. RESPONSIBILITIES OF THE PARTIES

      A.   LSP agrees to bill, collect and remit to SWBT the charges for
           the services described in Section II. which charges are earned by
           any LEC (including SWBT), but which are to be billed to end users of
           the LSP.
<PAGE>   60




                                                                    APPENDIX BCR
                                                                     Page 4 of 5

      B.   In those cases in which the charges for the services listed
           in Section II. are due any LEC other than SWBT, SWBT will arrange to
           transfer these and charges to the appropriate company in accordance
           with accepted industry standards.

      C.   Charges for the services listed in Section II. to be billed,
           collected and by LSP for SWBT's benefit, shall be remitted by LSP to
           SWBT within 30 days of the date of SWBT's bill to LSP for such
           services.

      D.   SWBT agrees to bill and collect (or to have another LEC bill
           and collect, where the appropriate), and to remit to LSP, the
           charges for the services described in Section II., which charges are
           earned by LSP, but which are to be billed by another LEC (including
           SWBT) to the end users of that LEC.

      E.   Charges for the services listed in Section II. to be billed,
           collected and remitted by SWBT or another LEC for LSP's benefit,
           shall be remitted by SWBT to LSP within 30 days of the date of LSP's
           bill to SWBT for such services.

      F.   The full amount of the charges transmitted to either Party
           for billing, collecting and remitting shall be remitted by the other
           Party, without setoff, abatement or reduction for any purpose, other
           than to deduct the compensation, as described in Section IV, due the
           Party for performing the end user billing function.  The Party
           billing the end user shall be responsible for all uncollectible
           amounts related to the services described remitted in Section II.
           Notwithstanding this paragraph, SWBT may net amounts due to LSP
           under this Appendix against amounts owed to SWBT when SWBT renders a
           bill to LSP hereunder.

      G.   Each Party will furnish to the other such information as may
           be required for monthly billing and remitting purposes.

IV. COMPENSATION

      A Party performing the services described in Section II. A. will
      compensate the other Party in the amount of $.08 for each charge billed
      for any service described in Section II.A. and subsequently remitted
      pursuant to this Appendix by such other Party to the Party performing the
      services described in Section II. A.  A Party performing the services
      described in Section II. B. will compensate the other Party in the amount
      of $.05 for each charge billed for any service described in Section II.
      B. and subsequently remitted pursuant to this Appendix by such other
      Party to the Party performing the services described in Section II. B.
      Such compensation shall be paid (unless a Party has collected such
      compensation as described in Section III.F. above) within 30 days of the
      date of a bill for such compensation by the Party performing (or which
      has another LEC perform for it), the billing, collecting and remitting
      functions described in Section III.

<PAGE>   61




                                                                    APPENDIX BCR
                                                                     Page 5 of 5

V.   SWBT MAKES NO REPRESENTATIONS OR WARRANTIES, EXPRESS OR IMPLIED,
     INCLUDING BUT NOT LIMITED TO ANY WARRANTY AS TO MERCHANTABILITY OR FITNESS
     FOR INTENDED OR PARTICULAR PURPOSE WITH RESPECT TO SERVICES PROVIDED
     HEREUNDER. ADDITIONALLY, SWBT ASSUMES NO RESPONSIBILITY WITH REGARD TO THE
     CORRECTNESS OF THE DATA SUPPLIED BY LSP WHEN THIS DATA IS ACCESSED AND
     USED BY A THIRD PARTY.

<PAGE>   62




                                                                     APPENDIX CH
                                                                     Page 2 of 4

                          APPENDIX CLEARINGHOUSE (CH)

WHEREAS, SWBT operates a Clearinghouse (CH), as described below, for its own
behalf and that of participating LECs and LSPs, including LSP; and

WHEREAS, LSP wants to participate in the CH on the terms set forth herein;

The Parties agree to the following:

1. CLEARINGHOUSE DESCRIPTION

      SWBT operates a CH for the purpose of facilitating the exchange of
      certain alternatively billed intrastate intraLATA message toll call
      records and the reporting of settlement revenues owed by and among
      participating LECs and LSPs, including SWBT and LSP.

2. QUALIFYING MESSAGE CRITERIA

      The only toll call messages that qualify for submission to SWBT for CH
      processing are: (a) intrastate intraLATA sent collect (including calling
      card, collect and third number) messages which are originated in one LEC
      or LSP exchange, exclusively carried by a LEC or LSP over LEC or LSP
      facilities and billed to a customer located in a second LEC's or LSP
      exchange within the same state; or (b) intrastate intraLATA sent collect
      (but limited to calling card and third number) messages originated in one
      of SWBT's operating areas (located in parts of Texas, Arkansas, Kansas,
      Missouri or Oklahoma), exclusively carried by a LEC or LSP over LEC or
      LSP facilities, and billed to a customer located in a second LEC's or LSP
      exchange and not in the originating State.

3. RESPONSIBILITIES OF THE PARTIES

A.   LSP agrees that it will provide SWBT with billing records for CH
     processing that are in an industry standard format acceptable to SWBT and
     at a minimum will display the telephone number of the end user to whom the
     call is to be billed, and data about the call sufficient for a carrier to
     comply with all applicable state regulatory requirements.  For purposes of
     this Attachment, these records ("CH Records") will detail intraLATA toll
     calls which were originated by use of the single digit access code (i.e.,
     0+ and 0-) in one LEC or LSP exchange but are to be billed to an end user
     in a second LEC's or LSP exchange.  Such records are referred to as
     category 92 records for CH processing purposes.  The term "CH Record" will
     mean the call detail attributed to a single completed toll message.

      LSP agrees that all CH Records it generates will display indicators
      denoting whether category 92 Records should be forwarded to SWBT's CH.
      LSP will retain its originating

<PAGE>   63

                                                                    APPENDIX CH
                                                                     Page 3 of 4

      records for ninety (90) days such that the category 92 Records can be
      retransmitted to SWBT for CH processing, if needed.

B.   SWBT will provide and maintain such systems as it believes are required
     to furnish the CH service described herein. SWBT, in its capacity as
     operator of the CH, agrees to retain all CH Records processed through the
     CH for two (2) years.

C.   LSP will timely furnish to SWBT all CH Records required by SWBT to
     provide the CH service in accordance with the Technical Exhibit Settlement
     Procedures (TESP) dated DD/MM/YEAR, or as otherwise mutually agreed upon
     by the Parties.  SWBT will provide the CH service in accordance with the
     TESP, and such modifications as are subsequently agreed upon.

D.   Presently, in operating the CH, SWBT relies upon NXX codes to identify
     messages for transmission to participating billing companies. To the
     extent any subprocesses are required to settle CH messages due to the use
     of ported numbers, such subprocessing will be the responsibility of the
     porting entity.

4.   PROCESSING CHARGE

      LSP agrees to pay SWBT a processing charge in consideration of SWBT's
      performance of CH services. This charge is $.02 per originated CH Record
      processed on behalf of LSP.

5.   BILLING CHARGE

      LSP agrees to pay a $.05 per message charge to the LEC or LSP responsible
      for billing the message, including SWBT, when SWBT bills the message.

6.   SETTLEMENT REPORT

      SWBT will issue monthly reports containing the results of the processing
      of CH Records to each participating LEC and LSP. These reports list the
      (a) amounts owed by LSP for billing messages originated by others; (b)
      amounts due to LSP for LSP-originated messages billed by others; (c)
      applicable billing charges; and (d) processing charges.

7.   RETROACTIVE AND LOST MESSAGES

      The Parties agree that processing of retroactive messages through the CH
      is acceptable, if such messages utilize the industry standard format for
      call records, pursuant to Section 3 of this Attachment. The Parties agree
      that lost messages are the complete responsibility of the originating LEC
      or LSP. If messages are lost by any Party, and cannot be recreated or
      retransmitted, the originating LEC or LSP will estimate messages,
      minutes,

<PAGE>   64


                                                                     APPENDIX CH
                                                                     Page 4 of 4



      and associated revenues based on the best available data. No estimate 
      will be made for messages which are more than two years old at the time 
      the estimate is made. The estimates will be off-line calculations (i.e.,
      not part of the routine CH processing) and will be included as a 
      supplement to the monthly settlement report.

8.   LIMITATION OF LIABILITY

      By agreeing to operate the CH, SWBT assumes no liability for any LEC's or
      LSP's receipt of appropriate revenues due to it from any other entity.
      LSP agrees that SWBT will not be liable to it for damages (including, but
      not limited to, lost profits and exemplary damages) which may be owed to
      it as a result of any inaccurate or insufficient information resulting
      from any entity's actions, omissions, mistakes, or negligence and upon
      which SWBT may have relied in preparing settlement reports or performing
      any other act under this Attachment.

      LSP agrees to indemnify and hold SWBT harmless against and with respect
      to any and all third party claims, demands, liabilities or court actions
      arising from any of its actions, omissions, mistakes or negligence
      occurring during the course of SWBT's performance of CH processing
      pursuant to this Attachment.

      SWBT will not be liable for any losses or damages arising out of errors,
      interruptions, defects, failures, or malfunction of the CH services
      provided pursuant to this Attachment, including those arising from
      associated equipment and data processing systems, except such losses or
      damages caused by the sole negligence of SWBT.  Any losses or damage for
      which SWBT is held liable under this Attachment will in no event exceed
      the amount of processing charges incurred by LSP for the CH services
      provided hereunder during the period beginning at the time SWBT receives
      notice of the error, interruption, defect, failure or malfunction, to the
      time service is restored.

9.   DISCLAIMER OF WARRANTIES

      SWBT MAKES NO REPRESENTATIONS OR WARRANTIES, EXPRESS OR IMPLIED,
      INCLUDING BUT NOT LIMITED TO ANY WARRANTY AS TO MERCHANTABILITY OR
      FITNESS FOR INTENDED OR PARTICULAR PURPOSE WITH RESPECT TO SERVICES
      PROVIDED HEREUNDER.  ADDITIONALLY, SWBT ASSUMES NO RESPONSIBILITY WITH
      REGARD TO THE CORRECTNESS OF THE DATA SUPPLIED BY LSP WHEN THIS DATA IS
      ACCESSED AND USED BY A THIRD PARTY.

<PAGE>   65
                                                                  APPENDIX CNAM
                                                                    Page 2 of 13


                                 APPENDIX CNAM

This appendix contains the terms and conditions under which SWBT and LSP shall
provide CNAM Service Query service (or equivalent service):

1. Definitions

     A. A-links mean a diverse pair of facilities connecting local end office
switching centers with Signaling Transfer Points.

     B. Calling Name Delivery (CNAM) service enables the terminating end user
to identify the calling party by a displayed name before the call is answered.
The calling party's name, date and time of the call are retrieved from an SCP
database and delivered to the end user's premise between the first and second
ring for display on compatible customer premise equipment (CPE).

     C. CNAM Service Query is SWBT's service that allows LSP to query SWBT's
Calling Name database for Calling Name information in order to deliver that
information to LSP's local subscribers.

     D. Calling Name database means a Party's database containing current
Calling Name information of all working lines served or administered by that
Party, including the Calling Name information of any telecommunications company
participating in that Party's Calling Name database.

     E. Calling Name information means telecommunications companies' records of
all their subscribers' names associated with one or more assigned ten-digit
telephone numbers.

     F. Service Control Point (SCP) is a CCS network node where the Calling
Name database resides.

     G. Service Point (SP) means a CCS network interface element capable of
initiating and/or terminating SS7 messages from an end office.

     H. Service Switching Point (SSP) means the software capability within a
switching point that provides the SP with SS7 message
preparation/interpretation capability plus SS7 transmission/reception access
ability.


<PAGE>   66

                                                                   APPENDIX CNAM
                                                                    Page 3 of 13


     I. Signaling Transfer Point (STP) is the point where a Party interconnects
with a CCS/SS7 network.  In order to connect to SWBT's SS7 network, LSP or a
third party initiating LSP's Calling Name Queries must connect with an SWBT STP
in order to connect to SWBT's SCP.

     J. Common Channel Signaling (CCS) Network is an out-of-band,
packet-switched, signaling network used to transport supervision signals,
control signals, and data messages.  CNAM Queries and Response messages are
transported across the CCS network.

     K. Signaling System 7 (SS7) is the signaling protocol used by the CCS
network.

     L. CNAM Service Query Rate applies to each CNAM Query received at the SCP
where a Party's Calling Name database resides.

     M. Query Transport Rate applies to each CNAM Query transported through a
Party's interconnecting STP and between the STP and the Calling Name database.
SWBT and LSP shall list their STP locations in the National Exchange Carrier
Association, Inc. Tariff FCC No. 4.

     N. Query means a message in American National Standards Institute's (ANSI)
standard SS7 signaling protocol which represents a request to a Calling Name
database for Calling Name information.

     O. Response means an SS7 message which when appropriately interpreted
represents an answer to a Query.

     P. Name Record Administering Companies means telecommunications companies
that administer telephone number assignments to the public and which make their
Calling Name information available in a Party's Calling Name database.

2. Description of Service

     A. SWBT shall provide LSP Calling Name information whenever LSP initiates
a Query from an SSP for such information associated with a call terminating to
a CNAM subscriber.

     B. All Queries to SWBT's Calling Name database shall use a translation
type of 005 and a subsystem number in the calling party field mutually agreed
upon by 

<PAGE>   67
                                                                   APPENDIX CNAM
                                                                    Page 4 of 13


the Parties. LSP acknowledges that such subsystem number and translation type
values are necessary for SWBT to properly process Queries to its Calling Name
database.

     C. LSP warrants to SWBT that it shall send Queries conforming to the ANSI
approved standards for SS7 protocol and pursuant to the specification standards
documents identified in Exhibit A. Both Parties acknowledge that transmission in
said protocol is necessary for each party to provision CNAM Service Query. (Or
the equivalent thereof). Both Parties warrant that they shall send SS7 Messages
that comply with ANSI approved standards for SS7 protocol and pursuant to the
specification standards documents identified in Exhibit A. Each party reserves
the right to modify its network pursuant to other specifications standards,
which may include Bellcore specifications defining specific service
applications, message types and formats, that may become necessary to meet the
prevailing demands within the U.S. telecommunications industry. All such changes
shall be announced a minimum of 180 days in advance of implementation through
industry standard procedures. Each party will work cooperatively to coordinate
any necessary changes.

     D. LSP acknowledges and agrees that CCS/SS7 network overload due to
extraordinary volumes of Queries and/or other SS7 network messages can and will
have a detrimental effect on the performance of SWBT's CCS/SS7 network.  LSP
further agrees that SWBT, in its sole discretion, shall employ certain
automatic and/or manual overload controls within its CCS/SS7 network to guard
against these detrimental effects.  SWBT shall report to LSP any instances
where overload controls are invoked due to LSP's CCS/SS7 network and LSP agrees
in such cases to take immediate corrective actions as are necessary to cure the
conditions causing the overload situation.

     E. Prior to initiating service under this Agreement, LSP shall provide to
SWBT an initial forecast of busy hour Query volumes.  If, prior to the
establishment of a mutually agreeable service effective date, in writing, SWBT,
at its discretion, determines that it lacks adequate storage or processing
capability to provide CNAM Service Query to LSP, SWBT shall notify LSP of its
intent not to provide the services under this Appendix and this Appendix will
be void and have no further effect.

     F. Upon request, LSP shall update its busy hour forecast for each upcoming
calendar year (January - December) by October 1 of the preceding year.  LSP
shall provide such updates each year for the first three (3) years of this
Agreement.

     G. SWBT provides CNAM Service Query as set forth in this Appendix only as
such service is used for LSP's activities as a local service provider in SWBT's
traditional serving areas in the states of Arkansas, Kansas, Missouri,
Oklahoma, and Texas.  SWBT provides CNAM Service Query for interexchange
carriers, operator 

<PAGE>   68

                                                                   APPENDIX CNAM
                                                                    Page 5 of 13


service providers, and other telecommunications companies under separate
contract rates. LSP agrees that any use of SWBT's LIDB for the provision of CNAM
Service Query by LSP, including, but not limited to, when LSP acts as an LSP
outside of SWBT's traditional serving areas in the states of Arkansas, Kansas,
Missouri, Oklahoma, and Texas, and/or acts as an operator service provider to
other LSPs, local exchange companies, or any other telecommunications company,
and/or acts as an interexchange carrier, will be pursuant to the standard terms,
conditions, rates and charges of SWBT's non-LSP contracts, as revised, for CNAM
Service Query.

3. Price and Payment

     A. LSP shall pay a CNAM Service Query Rate of $0.0115 and a Query Transport
Rate of $0.0045 for each Query initiated into SWBT's Calling Name database.
Additional nonrecurring charges for point code activation of $15.10 and service
order activity of $256.70 shall be applicable for all such activity after the
initial service order and initial point code activation. The per CNAM Service
Query rate SWBT charges hereunder may be increased upon sixty (60) days written
notice to the LSP unless LSP acts as an agent on behalf of other carriers in
which case ninety (90) days written notice shall be given. Upon such notice, the
Party receiving notice may terminate this Appendix without any termination
liability as provided in Section 5(B) of this Appendix. All tariffed rates
associated with Services provided hereunder are subject to change pursuant to
revisions of such tariffs.

     B. SWBT shall record usage information for LSP's CNAM Queries terminating
to SWBT's Calling Name database.  SWBT shall use its SCPs as the source of
usage data.  SWBT shall aggregate usage by the point code of the
Query-originating SSP.

     C. Based upon the data identified in Subsection 3.B above, SWBT shall bill
the LSP for its CNAM Queries on a monthly basis.  The bill will be issued by
the fifteenth day of each month, and LSP shall pay the Subsection 3.B bill
within thirty (30) days of the bill issue date.

     D. Depending on LSP's choice of method for transporting its Queries and
responses, LSP may be required to purchase certain other services, especially
services that may be provided pursuant to effective tariffs.  In this event the
prices, terms, conditions and billing for such services will be specified in
the applicable tariff(s), and this Appendix shall not be construed to
circumvent the prices, terms, conditions, or billing as specified in the
applicable tariff(s).

<PAGE>   69
                                                                   APPENDIX CNAM
                                                                    Page 6 of 13


     E. If there is a dispute associated with a monthly bill, the disputing
Party shall notify the other in writing within ninety (90) calendar days of the
date of said monthly bill or the dispute shall be waived.  Each party agrees
that any amount of any monthly bill that the Party disputes will be paid by
that Party according to the terms of Subsection 3.C above.  Any adjustments
relating to a disputed amount shall be reflected on the next monthly bill
issued after resolution.  Any credit issued upon resolution of any dispute
shall bear interest at the rate specified in Subsection 3.C above, payable on
and as of the date the credit is issued.  Parties shall work cooperatively and
use their best efforts to resolve any disputes as quickly as possible.

     F. If LSP acts as a telecommunications company other than a local service
provider, or if LSP acts as a local service provider in areas outside of SWBT's
traditional service areas in the states of Arkansas, Kansas, Missouri,
Oklahoma, and Texas, LSP will designate those point codes from which it
originates CNAM Service Queries as an LSP acting as a local service provider
within SWBT's traditional service areas in the states of Arkansas, Kansas,
Missouri, Oklahoma and Texas from those point codes which originate CNAM
Service Queries for all other aspects of its business.  If LSP uses the same
OPC to originate Queries for its operations as an LSP within SWBT's traditional
service areas in the states of Arkansas, Kansas, Missouri, Oklahoma, and Texas
as it does for any other aspect of its business, then LSP will provide
SWBT with a percentage of use factor that SWBT can use to apportion LSP's
traffic between SWBT's terms and conditions, rates and charges under this
Appendix and the standard terms, conditions, rates and charges under SWBT's
non-LSP contracts.  LSP will provide this factor in a whole number between one
(l) and one hundred (100) to indicate the percentage of CNAM Service Queries
LSP originates as an LSP acting as a local service provider within SWBT's
traditional service area in the states of Arkansas, Kansas, Missouri, Oklahoma,
and Texas.  A percentage of use factor of 1 (one) indicates that one percent of
LSP's CNAM Service Queries originate as an LSP acting as a local service
provider within SWBT's traditional service areas in the states of Arkansas,
Kansas, Missouri, Oklahoma, and Texas.  A percentage of use factor of 100
indicates that one hundred percent of LSP's traffic is from LSP acting as a
local service provider within SWBT's traditional service areas in the states of
Arkansas, Kansas, Missouri, Oklahoma, and Texas.

     G. Such percentage of use factors will be provided by LSP on the LIDB
Access Service Order Form used to establish the service.  All updates to this
factor will be provided via a letter.  If LSP does not furnish a percentage of
usage factor, LSP agrees that SWBT will apply a percentage of use factor of one
percent (1%).

     H. LSP agrees to update its percentage of use factors on a quarterly
basis.  Effective on the first of January, April, July and October of each
year, LSP will 

<PAGE>   70
                                                                   APPENDIX CNAM
                                                                    Page 7 of 13


forward to SWBT, to be received no later than fifteen (15) business days
after the first of each such month, a revised report showing the percentage of
use factors for the past three months ending the last day of December, March,
June, and September, respectively, for each OPC from which LSP originates CNAM
Service Query. Both parties agree that the revised report will serve as the
basis for the next three months billing. Both parties agree that no prorating or
backbilling will be done based on the report. SWBT will use the revised report
to apportion usage rate, monthly rates, and nonrecurring charges until a revised
report is received from LSP as set forth and agreed to herein.

     I. Both parties agree that SWBT may, upon written request by Certified
U.S. mail (return receipt requested), require LSP to provide call detail
records which will be audited to substantiate the projected percentage of use
factor provided by LSP.  SWBT may request this detailed information annually.
If the audit results represent what SWBT considers to be a substantial
deviation from LSP's previously reported percentage of use for the period upon
which the audit is based, and that deviation is not due to seasonal changes or
other identifiable reasons, LSP agrees to allow SWBT to request such call
detail records more than once annually.  Both parties agree that SWBT may make
the call detail records available to an independent auditor or to SWBT audit
employees within thirty (30) days of the request at an agreed upon location
during normal business hours.

     J. Both parties agree that if LSP fails to comply with SWBT's request for
auditable call detail records, SWBT may refuse additional applications for
service and/or refuse to complete any pending orders for service for a period of
thirty (30) days. If at the conclusion of thirty (30) days, LSP still does not
comply with this request, both parties agree that SWBT may apply an assumed
percentage of use factor of one percent (1%).

4. Ownership of the Calling Name Information

     A. Telecommunications companies depositing information in a Party's
Calling Name database retain full and complete ownership and control over such
Calling Names information in that Calling Name database.  The querying Party
obtains no ownership interest by virtue of this Appendix.

     B. LSP shall not copy, store, maintain or create any table or database of
any kind after initiation of, and based upon a response to, a CNAM Query to
SWBT's calling name database.
<PAGE>   71

                                                                   APPENDIX CNAM
                                                                    Page 8 of 13


     C. If LSP acts on behalf of other carriers, LSP shall prohibit its
Query-originating carrier customers from copying, storing, maintaining, or
creating any table or database of any kind from any Response provided by SWBT
after a CNAM Query to a Calling Name database.

5. Term and Termination

     A. This Appendix shall become effective pursuant to Section XXVII
(Effective Date) of the Agreement and shall continue for two (2) years from the
date of implementation of CNAM Service Query (or the equivalent thereof).
Thereafter, this Appendix shall remain in effect unless terminated by either
party upon written notice given sixty (60) days in advance of the termination
date.

     B. Should LSP terminate this Appendix within the first six (6) months of
this effective date, LSP agrees to pay SWBT an early termination sum equal to
two (2) times the average monthly volume of LSP's CNAM Queries times the rate
specified in Section 3(A) of this Appendix.  The average monthly volume will be
calculated using the previous two (2) months' volume divided by two (2) or, if
less than two months, the monthly volume of the first month service was
provided.

     C. If at any time during the term of this Appendix a tariff for CNAM
Service Query (or the equivalent service thereof) becomes effective, the tariff
and all terms and conditions, including all rates, will supersede this
Appendix.  Under these circumstances, no termination liability as provided in
Section 5(B) of this Appendix will apply.

     D. If a party materially fails to perform its obligation under this
appendix, the other party, after notifying the non-performing party of the
failure to perform and allowing that party thirty (30) days after receipt of the
notice to cure such failure, may cancel this appendix immediately upon written
notice.

     E. Notwithstanding anything to the contrary in this Appendix, if legal or
regulatory decisions or rules compel SWBT or LSP to terminate the Appendix,
SWBT and LSP shall have no liability to the other in connection with such
termination.

6. Limitation of Liability

     A. LSP's sole and exclusive remedies against SWBT for injury, loss or
damage caused by or arising from anything said, omitted or done in connection
with this Appendix regardless of the form of action, whether in contract or in
tort (including 

<PAGE>   72
                                                                   APPENDIX CNAM
                                                                    Page 9 of 13

negligence or strict liability) shall be the amount of actual
direct damages and in no event shall exceed the amount paid for CNAM Service
Queries.

     B. The remedies in Section 6(A) of this Appendix shall be exclusive of all
other remedies against a Party, its affiliate, or parent corporation,
(including their directors, officers, employees or agents).

     C. In no event shall SWBT have any liability for system outages or
inaccessibility, or for losses arising from the unauthorized use of the data by
CNAM Service Query purchasers.

     D. CALLING NAME INFORMATION PROVIDED TO AN LSP HEREUNDER SHALL BE PROVIDED
"AS IS." SWBT MAKES NO WARRANTY, EXPRESS OR IMPLIED, REGARDING THE ACCURACY OR
COMPLETENESS OF THE CALLING NAME INFORMATION REGARDLESS OF WHOSE CALLING NAME
INFORMATION IS PROVIDED.  AND, SWBT SHALL NOT BE HELD LIABLE FOR ANY ACTIONS OR
OMISSIONS ARISING OUT OF OR IN CONJUNCTION WITH LSP'S USE OF THE CALLING NAME
INFORMATION.  NOTWITHSTANDING THE FOREGOING, SWBT WARRANTS THAT LSP WILL BE
ACCESSING THE SAME CALLING NAME DATABASE FOR CUSTOMER'S CNAM QUERIES AS SWBT
ACCESSES FOR ITS OWN QUERIES.

     E. SWBT is furnishing access to its Calling Name database in order to
facilitate the LSP's provision of Calling Name Delivery Service (CNDS) to its
end users or to the end users of its Query-originating carrier customers, but
not to insure against the risk of completion of a call to a CNDS subscriber
without the display of the name of the caller. While each Party agrees to make
every reasonable attempt to provide accurate and current Calling Name
information, the Parties acknowledge that Calling Name information is the
product of routine business service order activity. LSP acknowledges that SWBT
can furnish Calling Name information only as accurate and current as the
information has been provided to SWBT for inclusion in its CNAM database.
Therefore, SWBT, in addition to the limitations of liability set forth, is not
liable for inaccuracies in the Calling Name information name records provided to
LSP or to its Query-originating carrier customers, except such inaccuracies
caused by SWBT's willful or wanton misconduct or gross negligence.

     The Parties acknowledge that each Calling Name database limits the Calling
Name information length to fifteen (15) characters.  As a result, the Calling
Name Information provided in a response to a Query may not reflect a
subscriber's full name.  Name records of residential local telephone
subscribers will generally be stored in the form of last name followed by first
name (separated by a comma or space) to a 

<PAGE>   73
                                                                   APPENDIX CNAM
                                                                   Page 10 of 13

maximum of fifteen (15) characters. Name records of business local
telephone subscribers will generally be stored in the form of the first fifteen
(15) characters of the listed business name that in some cases may include
abbreviations. The Parties also acknowledge that certain local telephone service
subscribers of Name Record Administering Companies may require their name
information to be restricted, altered, or rendered unavailable. Therefore, in
addition to the limitations of liability set forth in Section 6 of this
Appendix, SWBT is not liable for any and all liability, claims, damages or
actions including attorney's fees, resulting directly or indirectly from the
content of any Name Record contained in a Calling Name database and provided to
LSP or its Query-originating carrier customers, except for such content related
claims, damages or actions resulting from SWBT's willful or wanton misconduct or
gross negligence.

     F. The Parties acknowledge that certain federal and/or state regulations
require that local exchange telephone companies make available to their
subscribers the ability to block the delivery of their telephone number and/or
name information to the terminating telephone when the subscriber originates a
telephone call.  This blocking can either be on a call-by-call basis or on an
every call basis.  Similarly, a party utilizing blocking services can unblock
on a call-by-call basis or every call basis.  LSP acknowledges its
responsibility to and warrant that it will abide by information received in SS7
protocol during call set-up that the calling telephone service subscriber
wishes to block or unblock the delivery of telephone number and/or name
information to a CNDS subscriber.  LSP agrees not to attempt to obtain the
caller's name information by originating a Query to SWBT's Calling Name
database where the subscriber attempted to block such information, nor will LSP
block information a subscriber attempted to unblock.  Therefore, SWBT, in
addition to the limitations of liability set forth in this Section, is not
liable for any failure by LSP or its Query-originating carrier customers to
abide by the caller's desire to block or unblock delivery of Calling Name
information, and LSP agrees to hold SWBT harmless from, and defend and
indemnify SWBT for, any and all liability, claims, damages or actions including
attorney's fees, resulting directly or indirectly from LSP or its
Query-originating carrier customers' failure to block or unblock delivery of
the Calling Name information when appropriate indication is provided, except
for such privacy related claims, damages or actions caused by SWBT's willful or
wanton misconduct or gross negligence.

     G. In no event shall SWBT, its affiliates, subsidiaries or parent
corporation (including its directors, officers, employees or agents) have any
liability whatsoever to or through LSP for any indirect, special, or
consequential damages, including, but not limited to loss of anticipated
profits or revenue or other economic loss in connection with or arising from
anything said, omitted or done hereunder, even if SWBT has been advised of the
possibility of such damages.

<PAGE>   74

                                                                   APPENDIX CNAM
                                                                   Page 11 of 13

7. Communication and Notices

     A. Ordering and billing inquiries for the services described herein from
SWBT shall be directed to the Local Service Provider Service Center (LSPSC).
Ordering shall be done through the LSPSC using the form attached hereto as
Exhibit B.

8. Confidentiality

     A. Identification.  SWBT and LSP recognize and acknowledge that, in
connection with the services to be provided hereunder, it may disclose to the
other party proprietary or confidential customer, technical or business
information in written, graphic, oral or other tangible or intangible forms.
In order for such information to be considered "Proprietary Information" under
this Appendix, it must be marked "Confidential" or "Proprietary" or bear a
marking of similar import.  Orally discussed information shall be considered
Proprietary Information only if contemporaneously identified as such and
reduced to writing and delivered to the other party with a statement or marking
of confidentiality within twenty (20) calendar days after oral disclosure.

     B. Nondisclosure.  Subject to Sections 8C through 8F, the Party (the
"Receiving Party") that receives Proprietary Information from the other Party
(the "Disclosing Party") agrees:

     (1) That all Proprietary Information shall be and shall remain the
exclusive property of the Disclosing Party.

     (2) To limit access to such Proprietary Information to authorized
employees and other individuals who have a need to know the Proprietary
Information in order to perform its obligation under this Appendix.

     (3) To keep such Proprietary Information confidential and to use the same
level of care to prevent disclosure or unauthorized use of the received
Proprietary Information as it exercises in protecting its own Proprietary
Information of a similar nature.

     (4) For a period of three (3) years following any disclosure, not to copy
or publish or disclose such Proprietary Information to others or authorize
anyone else to copy or publish or disclose such Proprietary Information to
others without the prior written approval of the Disclosing Party.
<PAGE>   75
                                                                   APPENDIX CNAM
                                                                   Page 12 of 13

     (5) To use such Proprietary Information only for purposes of performing
its obligations under this Appendix and for other purposes only upon such terms
as may be agreed upon between the Parties in writing.

     C. Required Disclosures.  The Receiving Party agrees to give notice to the
Disclosing Party of any demand to disclose or provide Proprietary Information
of the Disclosing Party to another person, under lawful process, prior to
disclosing or furnishing such Proprietary Information.  Further, the Receiving
Party agrees to reasonably cooperate if the Disclosing Party deems it necessary
to seek protective arrangements.  The Receiving Party may disclose or provide
Proprietary Information of the Disclosing Party to meet the requirements of a
court, regulatory body or government agency having jurisdiction over the Party;
provided, however, that the Receiving Party shall notify the Disclosing Party
so as to give the Disclosing Party a reasonable opportunity to object to such
disclosure.  The Disclosing Party may not unreasonably withhold approval of
protective arrangements provided by any such court, regulatory body or
government agency.  Nothing herein requires either Party to support the
position of any person or entity as to whether any particular Proprietary
Information is proprietary under applicable law or this Section 8.

     D. Exceptions.  Notwithstanding anything to the contrary contained in this
Appendix, the Proprietary Information described herein shall not be deemed
confidential or proprietary and the Receiving Party shall have no obligation to
prevent disclosure of such Proprietary Information if such Proprietary
Information:

     (1) is already known to the Receiving Party;
     (2) is or becomes publicly known, through publication, inspection of the
product, or otherwise, and through no wrongful act of the Receiving Party;
     (3) is received from a third party without similar restriction and without
breach of this Section 8;
     (4) is independently developed, produced or generated by the Receiving
Party;
     (5) is furnished to a third party by the Disclosing Party without a
similar restriction on the third party's rights; or
     (6) is approved for release by written authorization of the Disclosing
Party, but only to the extent of such authorization.

     E. Permitted Uses.  SWBT shall be permitted to use Proprietary Information
obtained through recording the volume of Customer Queries for the purposes of:
(a) estimation of facilities usage for jurisdictional separations; (b)
engineering and network planning of facilities; and (c) measurement for billing
purposes.


<PAGE>   76
                                                                   APPENDIX CNAM
                                                                   Page 13 of 13

     F. Legal Requirements.  Notwithstanding anything to the contrary contained
in this Agreement, a Party's ability to disclose Proprietary Information or use
disclosed Proprietary Information is subject to all applicable statutes,
decisions and regulatory rules concerning the disclosure and use of such
Proprietary Information which, by their express terms, mandate a different
handling of such information.

9. Mutuality

To the extent that LSP stores its own Calling Name information in a database,
LSP agrees that such Calling Name information shall be available to SWBT on
terms and conditions comparable to those contained in this Appendix.  Such
terms and conditions shall include but not be limited to, making such Calling
Name information available on a platform technically similar to that employed
by SWBT, and at a rate comparable to that charged by SWBT.

10. Attached and incorporated herein are:

         Exhibit A  - Specifications and Standards
         Exhibit B  - LIDB Access Service Order Form [to be attached].
<PAGE>   77

                                                                   APPENDIX CNAM
                                                                       EXHIBIT A
                                                                     Page 1 of 1




                          Specifications and Standards

<TABLE>
<CAPTION>
Descriptions of Subject Area
and Issuing Organization                                         Document Number
- ------------------------                                         ---------------
<S>                                                              <C>
A. Bellcore, SS7 Specifications                                  TR-NPL-000246
B. ANSI, SS7 Specifications
  - Message Transfer part                                        T1.111       
  - Signaling Connection Control                                 T1.112       
   Part                                                          
  - Transaction Capabilities                                     T1.114       
   Application Part                                                           
C. Bellcore, CLASS Calling Name Delivery                         TR-NWT-001188
  Generic Requirements                                                        
D. Bellcore, CCS Network Interface                               TR-TSV-000905
  Specifications                                                 
</TABLE>


<PAGE>   78
                                                                       EXHIBIT B
                                                                  September 1996
                                                                          Page 1

SOUTHWESTERN BELL TELEPHONE COMPANY 
CUSTOMER PROVIDED FACTOR REPORTS

                   LIDB ACCESS VALIDATION SERVICES ORDER FORM
<TABLE>
<S><C>
CUSTOMER NAME ______________________________________________________________________________

CARRIER CUSTOMER NAME ABBREVIATION _____________________________
(CCNA - THREE ALPHA CHARACTERS)

CUSTOMER ADDRESS 
____________________________________________________________________________________________

CUSTOMER BILLING NAME 
____________________________________________________________________________________________
(IF DIFFERENT THAN CUSTOMER NAME)

ACCESS CUSTOMER NAME ABBREVIATION ______________________________
(ACNA - THREE ALPHA CHARACTERS)

CUSTOMER BILLING ADDRESS
____________________________________________________________________________________________ 
(IF DIFFERENT THAN CUSTOMER ADDRESS)

CITY, STATE, ZIP CODE 
____________________________________________________________________________________________

CUSTOMER BILLING CONTACT NAME AND TELEPHONE NUMBER ___________________________________
                                                   (  )
____________________________________________________________________________________________

CREDIT INFORMATION:  TYPE OF OWNERSHIP ________
                     (S - SOLE OWNER; C - INCORP.; P - PARTNERSHIP)
IF INCORPORATED:
STATE WHERE INCORP. ___________ DATE INCORP. ______________

CHARTER NUMBER ____________________________________________

PRES. NAME _______________________________________________OFC. TEL. NO. _(___)____________________

V.P. NAME ________________________________________________OFC. TEL. NO. _(___)____________________

SECT. NAME _______________________________________________OFC. TEL. NO. _(___)____________________

TREA. NAME _______________________________________________OFC. TEL. NO. _(___)____________________

IF PARTNERSHIP:
PARTNERS NAME ____________________________________________OFC. TEL. NO. _(___)____________________

PARTNERS NAME_____________________________________________OFC. TEL. NO. _(___)_____________________

PARTNERS NAME_____________________________________________OFC. TEL. NO. _(___)_____________________
</TABLE>

<PAGE>   79
                                                                       EXHIBIT B
                                                                  September 1996
                                                                          Page 2

SOUTHWESTERN BELL TELEPHONE COMPANY
CUSTOMER PROVIDED FACTOR REPORTS

<TABLE>
<S><C>
PARTNERS NAME__________________________________________OFC. TEL. NO. _(___)_____________________
LETTER OF AGENCY DATED ______________SIGNATURE ___________________________________________

SWBT ORDER NUMBER ___________________

DESIRED DUE DATE ______________________FIRM DUE DATE ______________________________________

FOR NEW SERVICE, THE APPROXIMATE NUMBER OF NPA NXXs ____________________________________

TYPE OF ACTIVITY ______ (N - NEW OR ADD; C - CHANGE; D - DISCONNECT; S - SUPP)

BILLING ACCOUNT NUMBER (BAN) ______________________________________________________________

CUSTOMER ORDER CONTACT NAME, ADDRESS, ZIP CODE, AND TELEPHONE NUMBER:

_____________________________________
_____________________________________
_______________________(____)________

CUSTOMER TECHNICAL CONTACT NAME AND TELEPHONE NUMBER:
___________________________________________________________________________(____)________________

CPOC SVC. REP. CONTACT NAME AND TELEPHONE NUMBER:
___________________________________________________________________________(____)________________


*SWBT CKR:_________________________________________*TWO SIX CODE:____________________________
                  (SWBT ID OF CCS/SS7 INTERCONN. SVC.)

1.         _______________________________
2.         _______________________________
3.         _______________________________
4.         _______________________________

*THIS INFORMATION SHOULD BE OBTAINED BY THE LIDB CUSTOMER FROM THEIR CCS/SS7 INTERCONNECTION SERVICE PROVIDER.
</TABLE>

<PAGE>   80
                                                                       EXHIBIT B
                                                                  September 1996
                                                                          Page 3
SOUTHWESTERN BELL TELEPHONE COMPANY
CUSTOMER PROVIDED FACTOR REPORTS


LIDB VALIDATION SERVICE ____ CALLING NAME SERVICE ____

ORIGINATING LINE NUMBER SCREENING _____

ACT.     ORIGINATING POINT             ACT.      ORIGINATING POINT
TYPE     CODES:                        TYPE      CODES:

____       ___________________         ____      _______________________
____       ___________________         ____      _______________________
____       ___________________         ____      _______________________
____       ___________________         ____      _______________________
____       ___________________         ____      _______________________
____       ___________________         ____      _______________________
____       ___________________         ____      _______________________
____       ___________________         ____      _______________________
____       ___________________         ____      _______________________
____       ___________________         ____      _______________________
____       ___________________         ____      _______________________
____       ___________________         ____      _______________________
____       ___________________         ____      _______________________
____       ___________________         ____      _______________________
____       ___________________         ____      _______________________
____       ___________________         ____      _______________________
____       ___________________         ____      _______________________
____       ___________________         ____      _______________________
____       ___________________         ____      _______________________
____       ___________________         ____      _______________________
____       ___________________         ____      _______________________
____       ___________________         ____      _______________________
____       ___________________         ____      _______________________
____       ___________________         ____      _______________________
____       ___________________         ____      _______________________
____       ___________________         ____      _______________________
____       ___________________         ____      _______________________
____       ___________________         ____      _______________________
____       ___________________         ____      _______________________
____       ___________________         ____      _______________________
____       ___________________         ____      _______________________
____       ___________________         ____      _______________________
____       ___________________         ____      _______________________

REMARKS _______________________________________________________________________
_______________________________________________________________________________
_______________________________________________________________________________

DATE AND TIME RECEIVED IN THE CPOC




<PAGE>   81

                                                                       EXHIBIT B
                                                                  September 1996
                                                                          Page 4

SOUTHWESTERN BELL TELEPHONE COMPANY
CUSTOMER PROVIDED FACTOR REPORTS

LIDB VALIDATION SERVICE ____ CALLING NAME SERVICE ____

ORIGINATING LINE NUMBER SCREENING _____

ACT.     ORIGINATING POINT             ACT.      ORIGINATING POINT
TYPE     CODES:                        TYPE      CODES:

____       ___________________         ____      _______________________
____       ___________________         ____      _______________________
____       ___________________         ____      _______________________
____       ___________________         ____      _______________________
____       ___________________         ____      _______________________
____       ___________________         ____      _______________________
____       ___________________         ____      _______________________
____       ___________________         ____      _______________________
____       ___________________         ____      _______________________
____       ___________________         ____      _______________________
____       ___________________         ____      _______________________
____       ___________________         ____      _______________________
____       ___________________         ____      _______________________
____       ___________________         ____      _______________________
____       ___________________         ____      _______________________
____       ___________________         ____      _______________________
____       ___________________         ____      _______________________
____       ___________________         ____      _______________________
____       ___________________         ____      _______________________
____       ___________________         ____      _______________________
____       ___________________         ____      _______________________
____       ___________________         ____      _______________________
____       ___________________         ____      _______________________
____       ___________________         ____      _______________________
____       ___________________         ____      _______________________
____       ___________________         ____      _______________________
____       ___________________         ____      _______________________

REMARKS _______________________________________________________________________
_______________________________________________________________________________
_______________________________________________________________________________

DATE AND TIME RECEIVED IN THE CPOC
<PAGE>   82
SOUTHWESTERN BELL TELEPHONE COMPANY                                   EXHIBIT B
CUSTOMER PROVIDED FACTOR REPORTS                                 SEPTEMBER 1996
                                                                        PAGE 5


                  LIDB ACCESS VALIDATION SERVICE ORDER FORM

                                 INSTRUCTIONS

THE LIDB ACCESS VALIDATION SERVICE ORDER FORM CONSISTS OF FOUR PAGES.

PAGE 1  -  ALL THE INFORMATION ON THIS PAGE IS FOR ADMINISTRATIVE USE IN
           ESTABLISHING THE LIDB BILLING ACCOUNT. ALL OF THE INFORMATION IS
           REQUIRED ON THE INITIAL ORDER. ORDERS SUBMITTED SUBSEQUENT TO THE
           ESTABLISHED ACCOUNT WILL REQUIRE ONLY THE CUSTOMER'S NAME AND
           ADDRESS. THE OTHER ENTRIES WILL BE REQUIRED ONLY IF THERE IS A CHANGE
           TO THE ORIGINAL INFORMATION.

PAGE 2  -  ALL THE INFORMATION ON PAGE TWO IS FOR THE REQUESTED ACTIVITY.  THIS
           INFORMATION WILL ALWAYS BE REQUIRED.

1.       DESIRED DUE DATE/FIRM DUE DATE - APPROXIMATE NUMBER OF NPA NXXs

         ***DESIRED DUE DATE IS USED WHEN A FIRM DUE DATE HAS NOT BEEN
         COORDINATED WITH THE LIDB CUSTOMER PRIOR TO THE SUBMISSION OF THE ORDER
         FORM TO THE ICSC.

         THE LIDB CUSTOMER WILL ENTER THEIR DESIRED DATE FOR THEIR LIDB SERVICE
         TO BE ESTABLISHED AND THE APPROXIMATE NUMBER OF NPA NXXs ASSOCIATED
         WITH THE NEW SERVICE.

         IF THE ORDER IS FOR SUBSEQUENT ACTIVITY TO AN ESTABLISHED ACCOUNT, THE
         APPROXIMATE NUMBER OF NPA NXXs WILL NOT BE REQUIRED.

         ***FIRM DUE DATE IS USED WHEN THE CUSTOMER'S ACCOUNT MANAGER HAS
         COORDINATED WITH THE SNAC TO ESTABLISH THE DUE DATE PRIOR TO THE ORDER
         FORM BEING SENT TO THE CPOC.



<PAGE>   83
SOUTHWESTERN BELL TELEPHONE COMPANY                                   EXHIBIT B
CUSTOMER PROVIDED FACTOR REPORTS                                 SEPTEMBER 1996
                                                                        PAGE 6


PAGE 2 INSTRUCTIONS CONTINUED -

2.       TYPE OF ACTIVITY

         N - SHOULD BE ENTERED TO ESTABLISH A LIDB SERVICE CAN ALSO BE ENTERED 
             TO ADD ADDITIONAL POINT CODES TO AN EXISTING SERVICE

         C - SHOULD BE ENTERED TO ADD POINT CODES TO OR DELETE POINT CODES FROM
             AN EXISTING SERVICE

         D - SHOULD BE ENTERED TO COMPLETELY DISCONNECT AN EXISTING SERVICE

         S - SHOULD BE ENTERED TO MAKE A CHANGE ON A CURRENT ORDER PRIOR TO
             THE COMPLETION DATE (i.e., CHANGE DUE DATE, CORRECT POINT CODE(S),
             ETC.)

3.       BILLING ACCOUNT NUMBER (BAN)

         THE SWBT BILLING ACCOUNT NUMBER OF THE VALIDATION SERVICE AND/OR THE
         CALLING NAME SERVICE

         IF THE ORDER IS FOR NEW SERVICE, THIS FIELD WILL BE BLANK

4.       CUSTOMER ORDER CONTACT...

         A CONTACT WITH THE CUSTOMER THAT THE CPOC CAN COORDINATE WITH FOR THE
         DESIRED DUE DATE OR CORRECTIONS TO AN ORDER.

5.       CUSTOMER TECHNICAL CONTACT...

         A TECHNICAL CONTACT WITH THE CUSTOMER THAT THE SWBT SNAC CAN COORDINATE
         WITH FOR THE PROVISIONING OF THE SERVICE.

6.       CPOC SERVICE REP....

         THE SWBT CPOC SERVICE REPRESENTATIVE THAT NEGOTIATES THE ORDER WILL
         ENTER THEIR NAME AND CONTACT INFORMATION.

7.       SWBT CKR AND TWO SIX CODE

         THIS INFORMATION WILL BE OBTAINED BY THE LIDB CUSTOMER FROM THEIR ORDER
         TO ESTABLISH THEIR CCS/SS7 INTERCONNECTION SERVICE OR FROM THEIR
         CCS/SS7 INTERCONNECTION SERVICE PROVIDER. THERE WILL ALWAYS BE FOUR
         LINKS FOR ACCESS TO THE LIDB.



<PAGE>   84
SOUTHWESTERN BELL TELEPHONE COMPANY                                   EXHIBIT B
CUSTOMER PROVIDED FACTOR REPORTS                                 SEPTEMBER 1996
                                                                        PAGE 7


INSTRUCTIONS FOR PAGES 3 & 4 -

LIDB HAS THREE QUERY SERVICES:  VALIDATION, CALLING NAME (CNAM), AND ORIGINATING
                                LINE NUMBER SCREENING (OLNS)

THERE IS NOT A SPECIFIC NUMBER OF POINT CODES REQUIRED FOR ANY LIDB SERVICE. THE
LIDB CUSTOMER CAN SUBMIT AS MANY COPIES OF PAGES 3 & 4 AS REQUIRED FOR THEIR
POINT CODES PER REQUEST.

THE VALIDATION, CNAM, AND OLNS WILL BE ESTABLISHED ON A SINGLE BILLING ACCOUNT.
IF THE LIDB CUSTOMER WOULD LIKE SEPARATE BILLING ACCOUNTS, THEN SEPARATE BANs
MUST BE REQUESTED (i.e. "ESTABLISH SEPARATE BILLING ACCOUNTS") IN THE BILLING
ACCOUNT NUMBER FIELD ON PAGE 2. IF AN EXISTING LIDB CUSTOMER WANTS TO ESTABLISH
THEIR LIDB CNAM ON A SEPARATE BILLING ACCOUNT, THEN THE LIDB CUSTOMER SHOULD
ENTER "NEW BAN (OR SEPARATE BAN) FOR THE LIDB CNAM SERVICE" IN THE BILLING
ACCOUNT NUMBER FIELD ON PAGE 2. THE SAME WILL APPLY FOR A SEPARATE BAN FOR OLNS.
IN ORDER TO SET UP SEPARATE BILLING ACCOUNTS, THE POINT CODES FOR THE LIDB
VALIDATION, CNAM, AND OLNS SERVICES CANNOT BE THE SAME. THE CUSTOMER WILL USE
BOTH PAGES 3 & 4 TO SUBMIT THEIR POINT CODES SEPARATELY FOR SEPARATE BILLING
ACCOUNTS.

1.       LIDB VALIDATION SERVICE __________  CALLING NAME SERVICE __________
         ORIGINATING LINE NUMBER SCREENING ____________

         ENTER A CHECK MARK OR AN "X" TO INDICATE WHICH OF THE LIDB SERVICES THE
         ORDER FORM IS REQUESTING TO ESTABLISH OR DELETE. IF ALL LIDB SERVICES
         ARE REQUESTED ON THE SAME ORDER, THE POINT CODES FOR EACH SERVICE MUST
         BE LISTED ON SEPARATE PAGES. THIS WILL ENABLE SWBT TO APPLY THE CORRECT
         NONRECURRING CHARGES.

2.       ACTIVITY TYPES

         IF A LIDB CUSTOMER NEEDS TO CHANGE AN EXISTING OPC ON AN ESTABLISHED
         ACCOUNT, THE "D" SHOULD BE USED TO INDICATE THE OPC CHANGING FROM AND
         THE "N" SHOULD BE USED TO INDICATE THE OPC CHANGING TO.



<PAGE>   85
SOUTHWESTERN BELL TELEPHONE COMPANY                                   EXHIBIT B
CUSTOMER PROVIDED FACTOR REPORTS                                 SEPTEMBER 1996
                                                                        PAGE 8

PAGES 3 & 4 INSTRUCTIONS CONTINUED -

LIST OF ORIGINATING POINT CODES AND ACTIVITY TYPE

ACTIVITY TYPES:  N - ESTABLISHING OR ADDING NEW POINT CODE(S)
                 D - DELETE EXISTING POINT CODE(S)


PLEASE NOTE IN THE FOLLOWING EXAMPLES, THE ORDER FORM ACTIVITY IS THE ENTRY FROM
PAGE 2, NUMBER 3.  THIS IS NOT THE ACTIVITY TYPE.


EXAMPLE 1 - ORDER FORM ACTIVITY IS "N" TO ESTABLISH A NEW ACCOUNT AND SERVICE

     ACT.   ORIGINATING POINT                     ACT.   ORIGINATING POINT
     TYPE   CODES:                                TYPE     CODES:

   N            XXX-XXX-XXX                   N              XXX-XXX-XXX
  ---           -----------                  ---             -----------

EXAMPLE 2 - ORDER FORM ACTIVITY IS "C" TO CHANGE AN EXISTING POINT CODE OR TO
            ADD A NEW POINT CODE AND DELETE AN EXISTING POINT CODE

     ACT.   ORIGINATING POINT                   ACT.   ORIGINATING POINT
     TYPE   CODES:                              TYPE     CODES:

   N            XXX-XXX-XXX                   D              XXX-XXX-XXX
  ---           -----------                  ---             -----------

EXAMPLE 3 - ORDER FORM ACTIVITY IS "D" TO DISCONNECT THE ACCOUNT AND THE SERVICE

     ACT.   ORIGINATING POINT                   ACT.     ORIGINATING POINT
     TYPE   CODES:                              TYPE     CODES:

   D            XXX-XXX-XXX                   D              XXX-XXX-XXX
  ---           -----------                  ---             -----------

THE REMARKS SECTION MAY BE UTILIZED BY SWBT OR THE LIDB CUSTOMER.

THE DATE AND TIME RECEIVED WILL BE ENTERED BY THE SWBT CPOC UPON RECEIPT OF THE
FORM.

AFTER THE FORM HAS BEEN COMPLETED, IT SHOULD BE MAILED OR FAXED TO THE SWBT ICSC
IN ST. LOUIS, MISSOURI.



<PAGE>   86
                                                                    APPENDIX DCO
                                                                     PAGE 2 OF 3

                                  APPENDIX DCO

INTERCONNECTION SCHEDULE

<TABLE>
<CAPTION>
                                              DTI
Metropolitan                                  Intercon-             SWBT Intercon-                       Interconnection
Serving           Direction                   nection               nection                              Activation
Area              (1)          Trunk Type     Wire Center(2)        Wire Center(3)       POI(4)          Date
- -------------     -----------  -----------    -------------         --------------       -------------   ------------------
<S>               <C>          <C>            <C>                   <C>                  <C>             <C>
St. Louis         DTI to SWBT  Local          MRHGMOQADS1           STLSMO0501T          STLSMO05???
                               IntraLATA                            STLSMO2101T          STLSMO21???
                               InterLATA      

                  DTI to SWBT  Choke          MRHGMOQADS1           STLSMO2101T          STLSMO21???

                  DTI to SWBT  TOPS           MRHGMOQADS1           STLSMO05B2T          STLSMO??

                  DTI to SWBT  911            MRHGMOQADS1           STLSMO04CG0          STLSMO??

                  SWBT to DTI  Local          MRHGMOQADS1           STLSMO0501T          MRHGMOQADS1
                               Intralata                            STLSMO2101T          

                  DTI to SWBT  Local          MRHGMOQADS1           STLSMO01DSC          STLSMO01???
                                                                    CHFDMO52DSA          CHFDMO52???
                                                                    STLSMO27CG0          STLSMO27???
                                                                    STLSMO41CG0          STLSMO41???
                                                                    STLSMO07CG0          STLSMO07???
                                                                    STLMO43CG0           STLMO43???

                  SWBT to DTI  Local          MRHGMOQADS1           STLSMO01DSC          MRHGMOQADS1
                                                                    CHFDMO52DSA
                                                                    STLSMO27CG0
                                                                    STLSMO41CG0
                                                                    STLSMO07CG0
                                                                    STLMO43CG0           
</TABLE>








- ------------------
(1)   This column will be completed by indicating the direction of the 
terminating traffic (e.g. DTI to SWBT or SWBT to DTI).
(2)   DTI Interconnection Wire Center (DIWC) - The address of DTI's end office
or tandem through which SWBT will terminate traffic on DTI's network.
(3)   SWBT Interconnection Wire Center (SIWC) - The address of SWBT's end 
office or tandem through which DTI will terminate traffic on SWBT's network.

<PAGE>   87
                                                                    APPENDIX DCO
                                                                     PAGE 3 OF 3

<TABLE>
<CAPTION>
                                              DTI
Metropolitan                                  Intercon-             SWBT Intercon-                       Interconnection
Serving           Direction                   nection               nection                              Activation
Area              (4)          Trunk Type     Wire Center(5)        Wire Center(6)       POI(4)          Date
- -------------     -----------  -----------    -------------         --------------       -------------   ------------------
<S>               <C>          <C>            <C>                   <C>                  <C>             <C>
Springfield, MO   DTI to SWBT  Local          SPFDMO???             SPFDMOTL02T          SPFDMOTL???
                               IntraLATA
                               InterLATA
                               Choke
                               TOPS
                               911            

                  SWBT to DTI  Local          SPFDMO???             SPFDMOTL02T          SPFDMO???
                               Intralata      

Kansas City       DTI to SWBT  Local          KSCY?????             KSCYKSJO07T          KSCYKSJO???
                               IntraLATA
                               InterLATA      

                  DTI to SWBT  Local          KSCY?????             KSCYMO5503T          KSCYMO55???
                               IntraLATA
                               InterLATA
                               Choke
                               TOPS           

                  DTI to SWBT  911            KSCY?????             KSCYKSJO07T          KSCY????

                  SWBT to DTI  Local          KSCY?????             KSCYMO5503T          KSCY????
                               Intralata                            KSCYKSJO07T          
</TABLE>














- ------------------
(4)   This column will be completed by indicating the direction of the 
terminating traffic (e.g., DTI to SWBT or SWBT to DTI). 
(5)   DTI Interconnection Wire Center (DIWC) - The address of DTI's end office 
or tandem through which SWBT will terminate traffic on DTI's network. 
(6)   SWBT Interconnection Wire Center (SIWC) - The address of SWBT's end office
or tandem through which DTI will terminate traffic on SWBT's network.



<PAGE>   88

                                                                     APPENDIX DA
                                                                     Page 2 of 5




                                   APPENDIX DA

                          DIRECTORY ASSISTANCE SERVICE

This Appendix sets forth the terms and conditions under which Southwestern Bell
Telephone Company ("SWBT") agrees to provide Directory Assistance Services (DA
Services) for LSP ("LSP").

I.       SERVICES

         SWBT will provide the following DA Services:

         A.       DIRECTORY ASSISTANCE (DA) - consists of providing subscriber
                  listing information (name, address, and published telephone
                  number or an indication of "non-published status") to LSP's
                  end users who dial 411 or NPA+555+1212 and whenever
                  appropriate, performing Non-Published and Non-List service
                  according to current SWBT methods and practices.

         B.       DIRECTORY ASSISTANCE CALL COMPLETION (DACC) - an optional
                  service in which SWBT completes a call to the requested number
                  on behalf of LSP's end user, utilizing an automated voice
                  system or with operator assistance. SWBT agrees to provide DA
                  with DACC upon request.

II.      DEFINITIONS

         The following terms are defined as set forth below:

         A.       Non-List Telephone Number - A telephone number that, at the
                  request of the telephone subscriber, is not published in a
                  telephone directory, but is available by calling a SWBT DA
                  operator.

         B.       Non-Published Number - A telephone number that, at the request
                  of the telephone subscriber, is neither published in a
                  telephone directory nor provided by a SWBT DA operator.

         C.       Published Number - A telephone number that is published in a
                  telephone directory and is available upon request by calling a
                  SWBT DA operator.

         D.       Call Branding - the procedure of identifying a providers name
                  audibly and distinctly to the consumer at the beginning of
                  each DA Services call, and prior to completion of a DACC
                  request.



<PAGE>   89

                                                                     APPENDIX DA
                                                                     Page 3 of 5


III.     CALL BRANDING AND RATE REFERENCE REQUIREMENTS

         A.       REQUIREMENTS - Where SWBT provides LSPs OS and DA services via
                  the same trunk, both the OS and DA calls will be branded with
                  the same brand. Where SWBT is only providing DA service on
                  behalf of the LSP, specific DA branding can be provided upon
                  request. Such branding will be provided pursuant paragraph B.
                  below.

         B.       CALL BRANDING - SWBT will brand DA in LSP's name based upon 
                  the criteria outlined below:

                  1.       LSP will provide SWBT with written specification of
                           its company name to be used in creating LSP specific
                           branding messages for its DA calls.

                  2.       An initial non-recurring charge applies per TOPS
                           switch, per load for the establishment of Call
                           Branding as well as a charge per TOPS switch, per
                           subsequent load to change the brand. In addition, a
                           per call charge applies for every DA call handled by
                           SWBT on behalf of LSP when such services are provided
                           in conjunction with: i) the purchase of SWBT's
                           unbundled local switching; or ii) when multiple
                           brands are required on a single Operator Services
                           trunk. Prices for Call Branding are as outlined in
                           Exhibit II, attached hereto and incorporated herein.

         C.       DIRECTORY ASSISTANCE (DA) RATE/REFERENCE INFORMATION - SWBT
                  will provide LSP DA Rate/Reference Information based upon the
                  criteria outlined below:

                  1.       LSP will furnish DA Rate and Reference Information in
                           a mutually agreed to format or media thirty (30) days
                           in advance of the date when the DA Services are to be
                           undertaken.

                  2.       LSP will inform SWBT, in writing, of any changes to
                           be made to such Rate/Reference Information ten (10)
                           working days prior to the effective Rate/Reference
                           change date. LSP acknowledges that it is responsible
                           to provide SWBT updated Rate/Reference Information in
                           advance of when the Rates/Reference Information are
                           to become effective.

                  3.       In all cases when a SWBT Operator receives a rate
                           request from a LSP end user, SWBT will quote the
                           applicable DA rates as provided by LSP.

An initial non-recurring charge will apply per TOPS switch for loading of LSP's
Operator Services Rate/Reference Information as well as a charge per TOPS switch
for each subsequent change to either the LSP's DA Services Rate or Reference
Information.



<PAGE>   90

                                                                     APPENDIX DA
                                                                     Page 4 of 5


IV.      RESPONSIBILITIES OF THE PARTIES

         A.       SWBT will be the sole provider of DA Services for LSP's local
                  serving area(s) listed in Exhibit I, which is attached to this
                  Appendix, beginning on the service effective date also shown
                  in Exhibit I.

         B.       LSP will be responsible for providing the equipment and
                  facilities necessary for signaling and routing calls with
                  Automatic Number Identification (ANI) to each SWBT operator
                  switch. Should LSP seek to provide interexchange DA Service
                  under this agreement it is responsible for ordering the
                  necessary facilities. Nothing in this agreement in any way
                  changes the manner in which an interexchange Carrier obtains
                  access service for the purpose of originating or terminating
                  interexchange traffic.

         C.       Facilities necessary for the provision of DA Services shall be
                  provided by the parties hereto, using standard trunk traffic
                  engineering procedures to insure that the objective grade of
                  service is met. Each party shall bear the costs for its own
                  facilities. LSP shall bear the costs of facilities necessary
                  for signaling and routing calls with Automatic Number
                  Identification (ANI) to each SWBT operator switch. SWBT shall
                  bear the cost of facilities and equipment necessary to provide
                  DA Services.

         D.       LSP will furnish in writing to SWBT, thirty (30) days in
                  advance of the date when the DA Services are to be undertaken,
                  all end user listing records and information required by SWBT
                  to provide the DA Services.

         E.       LSP will keep end user listing records current using reporting
                  forms and procedures that are mutually acceptable to both
                  parties, and will inform SWBT, in writing, of any changes to
                  be made to such records. LSP will send the DA listing records
                  to SWBT via a local manual service order, T-TRAN, magnetic
                  tape or by any other mutually agreed to format or media.

         F.       SWBT will accumulate and provide LSP such data as necessary
                  for LSP to verify traffic volumes and bill its end users.

V.       METHODS AND PRACTICES

         SWBT will provide the DA Services to LSP's end users in accordance with
         SWBT's DA methods and practices that are in effect at the time the DA
         call is made, unless otherwise agreed in writing by both parties.

VI.      PRICING

         Pricing for DA Services shall be based on the rates specified in
         Exhibit II, PRICING, which is attached hereto and made part of this
         Appendix. The prices will apply from the

<PAGE>   91

                                                                     APPENDIX DA
                                                                     Page 5 of 5


         service effective date through the term of this agreement as specified
         in paragraph X., A. below. Beyond the specified term of this Appendix,
         SWBT may change the prices for the provision of DA Services upon one
         hundred-twenty (120) days' notice to LSP.

VII.     MONTHLY BILLING

         SWBT will render monthly billing statements to LSP, and remittance in
         full will be due within thirty (30) days of receipt.

VIII.    LIABILITY

         A.       In addition to the liability provisions contained in the
                  Agreement, LSP agrees to defend, indemnify, and hold harmless
                  SWBT from any and all losses, damages, or other liability
                  including attorneys fees that LSP may incur as a result of
                  claims, demands, wrongful death actions, or other suits
                  brought by any party that arise out of LSP's end users use of
                  DA Services. LSP shall defend against all end user claims just
                  as if LSP had provided such service to its end user with the
                  LSP's own operators and shall assert its tariff limitation of
                  liability for benefit of both SWBT and LSP.

         B.       LSP also agrees to release, defend, indemnify, and hold
                  harmless SWBT from any claim, demand or suit that asserts any
                  infringement or invasion of privacy or confidentiality of any
                  person or persons caused or claimed to be caused, directly, or
                  indirectly, by SWBT employees and equipment associated with
                  provision of the DA Services. This provision includes but is
                  not limited to suits arising from disclosure of the telephone
                  number, address, or name associated with the telephone called
                  or the telephone used to call the DA Services.

IX.      TERMS OF APPENDIX

         A.       Unless sooner terminated, this Appendix will continue in force
                  for a period of one (1) year from the effective date of this
                  agreement and thereafter until terminated by one
                  hundred-twenty (120) days notice in writing from either Party
                  to the other.

         B.       If LSP terminates this agreement prior to the agreed-upon term
                  of this Appendix, LSP shall pay SWBT, within thirty (30) days
                  of the issuance of a final bill by SWBT, all amounts due for
                  actual services provided under this Appendix, plus estimated
                  monthly charges for the remainder of the term. Estimated
                  charges will be based on an average of the actual monthly
                  amounts billed by SWBT pursuant to this Appendix prior to its
                  termination.

         C.       The rates applicable for determining the amount(s) under the
                  terms outlined in this Section are those specified in Exhibit
                  II.

<PAGE>   92

                                                         APPENDIX DA - EXHIBIT I
                                                                     Page 1 of 1

                                   APPENDIX DA
                   DIRECTORY ASSISTANCE SERVICES EXCHANGE LIST

                           EFFECTIVE:_______________
                                       (mm/dd/yr)

The following table depicts the services and exchanges covered by this Appendix:

<TABLE>
<CAPTION>
      SWBT SERVING                LSP'S
        OFFICE(S)               OFFICE(S)             TOLL (555)             LOCAL (411)               DACC
- -------------------------- --------------------- ---------------------- ---------------------- ----------------------
<S>                        <C>                   <C>                    <C>                    <C>

- -------------------------- --------------------- ---------------------- ---------------------- ----------------------

- -------------------------- --------------------- ---------------------- ---------------------- ----------------------

- -------------------------- --------------------- ---------------------- ---------------------- ----------------------

- -------------------------- --------------------- ---------------------- ---------------------- ----------------------

- -------------------------- --------------------- ---------------------- ---------------------- ----------------------

- -------------------------- --------------------- ---------------------- ---------------------- ----------------------
</TABLE>






<PAGE>   93


                                                        APPENDIX DA - EXHIBIT II
                                                                     Page 1 of 1

                                   APPENDIX DA
                                    MISSOURI
                                   EXHIBIT II
                           PRICING - FACILITIES BASED

                           EFFECTIVE:________________
                                        (mm/dd/yr)

The following rates will apply for each service element:

<TABLE>
           <S>                                                                              <C>
           A. DIRECTORY ASSISTANCE (DA)

           This usage rate applies to each DA call.

                                                                   Rate per call              $0.401

           B. DIRECTORY ASSISTANCE CALL COMPLETION DACC)

           This usage rate applies to each DA call that has been completed to
           the requested number.

                                                         Rate per completed call               $0.24
             
           C. CALL BRANDING

           An initial non-recurring charge applies per TOPS switch, per brand
           for the establishment of Call Branding.

                                                           Rate per initial load            $2,325.00
                                                  Rate per load for Brand change            $2,325.00
                                                                     Per Call(1)              $0.02

           D. DA SERVICES RATE/REFERENCE INFORMATION

           An initial non-recurring charge applies per TOPS switch for the
           initial load of Carrier's DA Services Rate/Reference Information. An
           additional non-recurring charge applies for each subsequent change to
           Rate/Reference Information.

                                                           Rate per initial load            $3,650.00
                                                 Rate per subsequent rate change            $2,650.00
                                            Rate per subsequent reference change            $2,650.00
</TABLE>

- ----------------
(1)   A per call charge will apply when DA services are provided in conjunction
with i) unbundled local switching or ii) when multiple brands are required on a
single trunk.
<PAGE>   94


                                                                    APPENDIX FGA
                                                                     Page 2 of 6


                                  APPENDIX FGA

This Appendix to Attachment Compensation sets forth the terms and conditions
under which the Parties will distribute revenue from the joint provision of
Feature Group A (FGA) Switched Access Services.

These services will be provided within a Local Access and Transport Area (LATA)
and/or an Extended Area Service (EAS) arrangement. The Primary Company will
compensate the Secondary Company only to the extent that it has not already been
compensated under its interstate or intrastate access service tariffs or other
settlement/contract arrangements. This Appendix is subject to applicable
tariffs.

1.0      DEFINITIONS

1.1      Local Access and Transport Area (LATA) means a pre-established
         geographic area encompassing one or more local exchange areas within
         which a Party may provide telecommunications services.

1.2      The term Extended Area Service (EAS) as used in this Appendix means the
         provision of message telephone exchange service between two or more
         local exchange service areas without a toll charge.

1.3      Subscriber Access Lines will mean a communication facility provided
         under a general and/or exchange service tariff extended from a customer
         premise to a central office switch which may be used to make and
         receive exchange service calls, intrastate toll service or interstate
         toll service calls.

1.4      Feature Group A Switched Access Service includes all facilities and
         services rendered in furnishing FGA access service, both in EAS and
         non-EAS (i.e., LATA wide terminations) areas, in accordance with the
         schedule or charges, regulations, terms and conditions stated in the
         interstate or intrastate access service tariffs of the Parties.

1.5      The Primary Company denotes the Party with the Primary office(s).

1.6      The Primary Office is an office which: (1) directly or jointly connects
         to an interexchange carrier and / or end user: and (2) provides joint
         FGA switched access service to that interexchange carrier and/or end
         user with other end offices.

1.7      The Secondary Company denotes the Party with the secondary office(s).

<PAGE>   95
                                                                    APPENDIX FGA
                                                                     Page 3 of 6


1.8      The Secondary Office is any office involved in providing joint FGA
         switched access to an Interexchange carrier and / or end user through
         the switching facilities of the Primary office.

1.9      Revenues under this Appendix are those FGA Switched Access amounts due
         the Primary and Secondary Companies under their applicable tariffs,
         less uncollectible revenues. Revenues for any other services are not
         included. Uncollectible revenues are those revenues the Primary Company
         is unable to collect, using its regular established collection
         procedures. The Primary Company may offset uncollectibles against
         current revenue distribution.

1.10     Access Minutes or Minutes of Use (MOUs) are those minutes of use as
         described in Part 69 of the Federal Communications Commission s Rules,
         and are limited to those FGA MOUs which originate and /or terminate in
         the Secondary Office(s) covered by this Appendix.

1.11     Currently Effective Tariff Rate means the approved tariff rate
         effective on the first day of the month for which compensation is being
         calculated.

2.0      UNDERTAKING OF THE PARTIES

2.1      The Secondary Company will notify the Primary Company of all tariff 
         rate revisions, affecting this Appendix which the FCC or other
         appropriate regulatory authority allows to take effect, at least 30
         days in advance of their effective date. Revenue distribution will be
         based on the revised rates 45 days after the effective date of the
         tariff revisions. However, if the secondary Company fails to notify the
         Primary Company of a new rate within 30 days of its effective date, the
         Primary company may delay implementation of the new rate until the next
         month s revenue distribution cycle, and will not be required to adjust
         the previous bills retroactive.

2.2      Each party will furnish to the other such information as may reasonably
         be required for the administration, computation and distribution of
         revenue, or otherwise to execute the provisions of this appendix.

3.0      ADMINISTRATION OF REVENUE DISTRIBUTION

         The Primary Company will be responsible for the administration,
         computation and distribution of the FGA access service revenues
         collected on behalf of the Secondary Company.


<PAGE>   96
                                                                    APPENDIX FGA
                                                                     Page 4 of 6


4.0      MINUTES OF USE (MOUs) DEVELOPMENT

4.1      The Parties will calculate the amount of FGA revenues due each Party,
         by determining the amount of FGA MOUs attributable to each Party as
         described below. The Primary Company will then multiply the MOUs by the
         rates in the Secondary Company's applicable tariff to determine the
         amounts tentatively due to the Secondary Company.

4.2      TERMINATING MOUs DEVELOPMENT

4.2.1    Actual monthly premium (charged at equal access end office) non-premium
         (charged at non-equal access end offices) terminating FGA access MOUs
         for each office in the LATA or a FGA access EAS area will be measured
         by the Primary Company.

4.2.2    Where the Primary Company cannot measure or identify the terminating
         FGA MOUs by end office, terminating MOUs will be total unmeasured MOUs
         allocated to the LATA. In this event, those MOUs will be distributed
         based upon the ratio of each Party's subscriber access lines, as
         identified in Exhibit B, which is attached hereto and made a part
         hereof, to the total subscriber access lines in the FGA access area as
         determined by the Primary Company.

4.3      ORIGINATING MOUS DEVELOPMENT

4.3.1    The Primary Company will derive and distribute monthly originating FGA
         access MOUs, billed by the Primary Company, to each Secondary Company's
         end office in the EAS calling area, as identified in Exhibit A, which
         is attached hereto and made a part hereof, based upon a ration of each
         Party s subscriber access lines to the total subscriber access lines in
         the appropriate EAS area as determined by the Primary Company.

4.3.2    The parties recognize that since originating non-EAS calls to the FGA
         service area are rated and billed as intraLATA toll, such usage is
         assumed to be minimal. Therefore, originating FGA access MOUs will not
         be distributed to end offices outside an EAS calling area.

5.0      CALCULATION OF REVENUE DISTRIBUTION

5.1      The amount of premium or non-premium revenues due each party each month
         will be equal to the sum of Originating and Terminating premium or
         non-premium revenue for each end office. These revenues will be
         calculated by the Primary Company by multiplying each of the Secondary
         Company s effective interstate and/or intrastate FGA switched access
         tariff rate elements (except the 



<PAGE>   97
                                                                    APPENDIX FGA
                                                                     Page 5 of 6


         Local Transport element described below) by the appropriate MOU
         calculation under Sections 4.2.1 and 4.2.2.

5.2      Local Transport (or its equivalent under the Secondary Company s tariff
         and called Transport in this agreement) compensation will be determined
         for each company by multiplying each of the Secondary Company s
         Transport rates by the appropriate MOUs (as calculated under Sections
         4.2.1 and 4.2.2.) by the Secondary company s percentage ownership of
         facilities agreed on by the Parties and set out in Exhibit B, which is
         attached hereto and made a part hereof.

6.0      REVENUE DISTRIBUTION AMOUNTS, MONTHLY STATEMENTS AND PAYMENTS

6.1      The Primary Company each month will calculate and prepare a monthly
         compensation statement reflecting the revenue distribution amounts for
         FGA, both EAS and non-EAS, access service due the Secondary Company.

6.2      The monthly compensation statement will show, for each Secondary 
         Office, separately:

6.2.1    The total number of non-premium or premium terminating MOUs and
         revenue.

6.2.2    The total number on non-premium or premium originating MOUs and 
         revenues.

6.2.3    The total compensation due the Secondary Company, by rate element.

6.2.4    The number of terminating MOUs recorded by the Primary Company.

6.2.5    The number of originating MOUs estimated by the Primary Company 
         pursuant to Section 4.3 contained herein.

6.2.6    The number of access lines used to prorate originating usage pursuant 
         to Section 4.3 contained herein.

6.2.7    The percent ownership factor, if any, used to prorate Local Transport
         revenues.

6.2.8    Adjustments for uncollectibles.

6.3      Within 60 Calendar days after the end of each billing period, the
         Primary Company will remit the compensation amount due the Secondary
         Company. Where more than one compensation amount is due, they may be
         combined into a single payment.


<PAGE>   98
                                                                    APPENDIX FGA
                                                                     Page 6 of 6


7.0      MISCELLANEOUS PROVISIONS

7.1      This appendix will remain in effect until terminated by thirty (30) 
         calendar day s notice by either Party to the other.



<PAGE>   99
                                                                    APPENDIX FGA
                                                                       EXHIBIT A
                                                                     Page 1 of 1

                                    EXHIBIT A

                  EAS Locations for Originating and Terminating

                         Feature Group A Access Service

       Primary Office                           Secondary Office
          Company                                   Company

     CLLI CODE   NPA-NXX                    CLLI CODE      NPA-NXX
     ACCESS LINE




<PAGE>   100
                                                                    APPENDIX FGA
                                                                       EXHIBIT B
                                                                     Page 1 of 1

                                    EXHIBIT B

                       Location for LATA Wide Termination

                      of Feature Group A Access Service in

                              Non-EAS Calling Areas



                            SECONDARY OFFICE COMPANY

                                                 % Ownership of
CLLI CODE        NPA-NXX       Access Line       Transport Facilities     LATA






<PAGE>   101

                                                                   APPENDIX HOST
                                                                     Page 2 of 5


                                  APPENDIX HOST

This Appendix sets forth the terms and conditions under which SWBT will perform
hosting responsibilities for LSP for ( 1 ) the provision of billable message
data and/or access usage data received from such LSP for distribution to the
appropriate billing and/or processing location via SWBT's in-region network or
via the nationwide Centralized Message Distribution System (CMDS) or (2)
billable message data and/or access usage data received from other Local
Exchange Carriers (LECs) or LSPs or from CMDS to be distributed to such LSP.
This Appendix covers hosting in region (i.e., Missouri, Arkansas, Kansas,
Oklahoma and Texas) and hosting out of region. Hosting out of region is only
available to an LSP that is a Full Status Revenue Accounting Office (RAO)
company.

I.       DEFINITIONS

         A.       Access Usage Record (AUR) - a message record which contains
                  the usage measurement reflecting the service feature group,
                  duration and time of day for a message which is subsequently
                  used by a LEC to bill access to an Interexchange Carrier
                  (IXC).

         B.       Bellcore Client Company Calling Card and Third Number
                  Settlement (BCC CATS) System - nationwide system used to
                  produce information reports that are used in the settlement of
                  LEC or LSP revenues recorded by one BCC (or LEC or LSP within
                  the territory of that BCC) and billed to a customer of another
                  BCC (or LEC or LSP within the territory of that BCC) as
                  described in accordance with the Bellcore Practice BR
                  981-200-110.

         C.       Billable Message Record - a message record containing details
                  of a completed call which has been carried by a LEC over its
                  facilities or by LSP over its facilities and such record is to
                  be used to bill an end user.

         D.       Centralized Message Distribution System (CMDS) - the national
                  network of private line facilities used to exchange Exchange
                  Message Record (EMR) formatted billing data between a company
                  originating a message and the company billing for a message.

         E.       Exchange Message Record (EMR) - industry standard message
                  format as described in accordance with the Bellcore Practice
                  BR 010-200-010 which was developed to facilitate the exchange
                  of telecommunications message information.

         F.       Full Status Revenue Accounting Office (RAO) - an LSP or LEC
                  that is responsible for formatting EMR records, and for
                  editing and packing of such detail records into files for
                  distribution.



<PAGE>   102
                                                                   APPENDIX HOST
                                                                     Page 3 of 5


         G.       In-Region Hosting - includes the transport, using Hosting
                  Company network, of (1) billable message record data for LEC
                  or LSP transported messages and/or access usage record data
                  that originate in a region and are delivered by the LSP to
                  SWBT at a mutually agreed upon location within the territory
                  of SWBT to be sent to another LEC or LSP for billing; and (2)
                  billable message record data and/or access usage data received
                  from CMDS or another LEC or LSP to be delivered to the LSP for
                  billing to its end user located within the five state
                  territory of SWBT.

         H.       Out-of-Region Hosting - includes the transport, using the
                  national CMDS network, of (1) billable message record data for
                  LEC or LSP transported messages and/or access usage record
                  data that originate out of region and are delivered by the LSP
                  to SWBT and are to be sent to another LEC or LSP for billing;
                  and (2) billable message record data and/or access usage data
                  received from CMDS or another LEC or LSP to be delivered to
                  the LSP for billing to its end user located outside SWBT's
                  five state territory.

         I.       Non-Full Status Revenue Accounting Office (RAO) - An LSP or
                  LEC that has assigned responsibility to SWBT for editing,
                  sorting and placing billing message record detail and/or
                  access usage record detail into packs for distribution.

II.      RESPONSIBILITIES OF THE PARTIES

         A.       All data forwarded from LSP must be in the industry standard
                  EMR format in accordance with Bellcore Practice BR
                  010-200-010. The LSP is responsible to ensure all appropriate
                  settlement plan indicators are included in the message detail,
                  i.e., the Bellcore Client Company Calling Card and Third
                  Number Settlement (BCC CATS) System. The LSP acknowledges that
                  the only message records subject to this Hosting Appendix are
                  those that arise from LEC or LSP transported billable messages
                  and/or access usage records to be used by a LEC or LSP for the
                  purpose of billing access to an IXC.

         B.       When LSP delivers billable message data and/or access usage
                  data to SWBT which must be forwarded to another location for
                  billing purposes, SWBT will accept data from the LSP, perform
                  edits to make message detail and access usage records
                  consistent with CMDS specifications, and use its in region
                  data network to forward this data to the appropriate billing
                  company or to access the national CMDS network in order to
                  deliver this data to the appropriate billing and/or processing
                  company.

                  If LSP is not a Full Status RAO Company, SWBT will also sort
                  billable message detail and access usage record detail by
                  Revenue Accounting Office, Operating Company Number or Service
                  Bureau and split data into packs for invoicing prior to using
                  its in region network to forward this data to the appropriate
                  billing company or to access the national CMDS network in
                  order to deliver such data to the appropriate billing company.

<PAGE>   103
                                                                   APPENDIX HOST
                                                                     Page 4 of 5


         C.       For billable message data and/or access usage data received by
                  SWBT for delivery to an LSP location, SWBT will use its in
                  region data network to receive this data from other LECs or
                  LSPs or from CMDS in order to deliver such billable message
                  data and/or access usage data to the agreed upon billing LSP
                  location.

III.     BASIS OF COMPENSATION

         LSP agrees to pay SWBT a per record charge for billable message records
         and/or access usage records that are received from LSP and destined for
         delivery to another location for billing, at the rates listed below:

              Per Record Charge
                  Full Status RAO Company
                      Hosting Company Network                       $.002
                      National CMDS Network                         $.005
                  Non-Full Status RAO Company
                      Hosting Company Network                       $.007
                      National CMDS Network                         $.010

         As part of this per record charge, SWBT will provide Confir mation
         and/or Error Reports and any Intercompany Settlement (ICS) Reports,
         such as the Bellcore Client Company Calling Card and Third Number
         Settlement System (BCC CATS), as needed.

         LSP agrees to pay SWBT a per record charge for billable message records
         and/or access usage records which are entered on a magnetic tape or
         data file for delivery to the LSP, at the rate listed below:

             Per Record Charge                                      $.003

IV.      LIABILITY

         A.       Any failure to populate accurate information in accordance
                  with Section II.A. will be the responsibility of the LSP.

         B.       SWBT will not be liable for any costs incurred by the LSP when
                  the LSP is transmitting data files via data lines and a
                  transmission failure results in the non-receipt of data by
                  SWBT.

         C.       SWBT SHALL NOT BE LIABLE IN ANY EVENT FOR ANY SPECIAL,
                  INDIRECT, INCIDENTAL, CONSEQUENTIAL, OR EXEMPLARY DAMAGES
                  RESULTING FROM, OR ARISING OUT OF, OR IN CONNECTION WITH, THIS
                  APPENDIX.

         D.       SWBT shall not be liable for any losses or damages arising out
                  of errors, interruptions, defects, failures, or malfunction of
                  the services provided hereunder,



<PAGE>   104
                                                                   APPENDIX HOST
                                                                     Page 5 of 5


                  including any and all associated equipment and data processing
                  systems, except such losses or damages caused by the sole
                  negligence of SWBT. Any losses or damage for which SWBT is
                  held liable under this Appendix shall in no event exceed the
                  amount of charges made for the services provided hereunder
                  during the period beginning at the time SWBT receives notice
                  of the error, interruption, defect, failure or malfunction to
                  the time service is restored.

         E.       The LSP agrees to release, defend, indemnify, and hold
                  harmless SWBT from any and all losses, damages, or other
                  liability, including attorney fees, that it may incur as a
                  result of claims, demands, or other suits brought by any party
                  that arise out of the use of this service by the LSP, its
                  customers or end users. The LSP shall defend SWBT against all
                  end user claims just as if LSP had provided such service to
                  its end users with its own employees.

         F.       The LSP also agrees to release, defend, indemnify and hold
                  harmless SWBT from any claim, demand or suit that asserts any
                  infringement or invasion of privacy or confidentiality of any
                  person(s), caused or claimed to be caused, directly or
                  indirectly, by SWBT employees and equipment associated with
                  provision of this service. This includes, but is not limited
                  to suits arising from disclosure of any customer specific
                  information associated with either the originating or
                  terminating numbers used to provision this service.

VI.      DISCLAIMER OF WARRANTIES

         SWBT MAKES NO REPRESENTATIONS OR WARRANTIES, EXPRESS OR IMPLIED,
         INCLUDING BUT NOT LIMITED TO ANY WARRANTY AS TO MERCHANTABILITY OR
         FITNESS FOR INTENDED OR PARTICULAR PURPOSE WITH RESPECT TO SERVICES
         PROVIDED HEREUNDER. ADDITIONALLY, SWBT ASSUMES NO RESPONSIBILITY WITH
         REGARD TO THE CORRECTNESS OF THE DATA SUPPLIED BY LSP WHEN THIS DATA IS
         ACCESSED AND USED BY A THIRD PARTY.



<PAGE>   105

                                                                    APPENDIX ITR
                                                                     Page 2 of 8


                                  APPENDIX ITR
                             (TRUNKING REQUIREMENTS)

This Appendix provides descriptions of the trunking requirements for the LSP and
SWBT interconnection. The attached scenarios depict the recommended trunk groups
for local, intraLATA toll, interLATA "meet point", mass calling, E911 and
Operator Services interconnection. All references to incoming and outgoing trunk
groups are from the perspective of the LSP.

I.       LOCAL TRAFFIC AND INTRALATA TOLL TRAFFIC

         (a)      The LSP Originating (The LSP to SWBT)

                  When SWBT has a combined local and access tandem in an
                  exchange, IntraLATA Toll Traffic may be combined with the
                  Local Traffic on the same trunk group. When SWBT has more than
                  one combined local and access tandem in an exchange, the LSP
                  shall provide a separate trunk group to each SWBT tandem. When
                  there are separate SWBT access and local tandems in an
                  exchange, a separate local trunk group shall be provided to
                  the local tandem and a separate IntraLATA toll trunk group
                  shall be provided to the access tandem. This trunk group(s)
                  shall be one-way or two-way directionalized outgoing only and
                  will utilize Signaling System 7 (SS7) or multifrequency (MF)
                  protocol signaling.

         (b)      The LSP Terminating (SWBT to LSP)

                  When SWBT has a combined local and access tandem, SWBT shall
                  normally combine the Local and IntraLATA Toll Traffic over a
                  single trunk group to the LSP. When SWBT has a separate access
                  and local tandem in an exchange, a trunk group shall be
                  established from each tandem to the LSP. This trunk group(s)
                  shall be one-way or two-way directionalized incoming only and
                  will utilize SS7 or MF protocol signaling.

         (c)      Direct End Office Trunking

                  The Parties shall establish direct end office primary high
                  usage trunk groups for Local Traffic and/or IntraLATA Toll
                  Traffic when end office traffic requires twelve or more
                  trunks. If LSP has established collocation to the end office,
                  the trunks shall be provisioned over the LSP collocation
                  facility. If the LSP has no collocation facilities, SWBT shall
                  provision the trunks from the NIP to the end office. IntraLATA
                  Toll Traffic shall be provided over a separate trunk group to
                  the SWBT access tandem.



<PAGE>   106
                                                                    APPENDIX ITR
                                                                     Page 3 of 8


II.      ACCESS TOLL CONNECTING TRUNKS

         InterLATA traffic shall be transported between the LSP Central Office
         and the SWBT access tandem over a "meet point" trunk group separate
         from local and intraLATA toll traffic. The access toll connecting trunk
         group will be established for the transmission and routing of Exchange
         Access traffic between the LSP's end users and interexchange carriers
         via a SWBT access tandem. When SWBT has more than one access tandem
         within an exchange, the LSP shall utilize a single access toll
         connecting trunk group to one SWBT tandem within the exchange. This
         trunk group may be set up as one-way or two-way (two-way is preferred)
         and will utilize SS7 or MF protocol signaling. The traffic use code and
         modifier for this trunk group should be MDJ (see Scenario 1, 2, 3, or
         4).

III.     800 (888) TRAFFIC

         If the LSP chooses SWBT to handle 800 (888) database queries from its
         central office switches, all the LSP originating 800 (888) service
         queries will be routed over the InterLATA Interexchange Carrier (MDJ)
         trunk group. This traffic will include a combination of both InterLATA
         Interexchange Carrier 800 (888) service and IntraLATA LEC 800 (888)
         service that will be identified and segregated by carrier through the
         database query handled through the SWBT tandem switch.

         A separate trunk group from each Party to the other will be required
         for IntraLATA 800 service if either Party chooses to handle the 800
         database queries from its switch location. The purpose of the separate
         trunk group is to provide for the segregation of originating 800
         IntraLATA call volumes to ensure the proper billing of intercompany
         settlement compensation.

         The trunk group shall be set up as one-way outgoing only and will
         utilize SS7 protocol signaling. The traffic use code and modifier for
         this trunk group should be DD800J (see Scenario 1, 2, 3, or 4).

IV.      E911

         A segregated trunk group will be required to each appropriate E911
         tandem within the exchange in which the LSP offers the Exchange
         Service. This trunk group shall be set up as a one-way outgoing only
         and shall utilize MF CAMA signaling. The traffic use code and modifier
         for this trunk group shall be ESJ (see Scenario 1, 2, 3, or 4).

V.       MASS CALLING (PUBLIC RESPONSE CHOKE NETWORK)

         A segregated trunk group shall be required to the designated Public
         Response Choke Network tandem in each serving area. This trunk group
         shall be one-way outgoing only and shall utilize MF signaling. It is
         recommended that this group be sized as follows:



<PAGE>   107
                                                                    APPENDIX ITR
                                                                     Page 4 of 8


         <15001 access lines (AC)                         2 trunks (min)
         15001 to 25000 AC                                3 trunks
         25001 to 50000 AC                                4 trunks
         50001 to 75000 AC                                5 trunks
         >75000 AC                                        6 trunks (max)

         The traffic use code and modifier for this trunk group shall be TOCRJ
         (see Scenario 1, 2, 3, or 4).

VI.      OPERATOR SERVICES

         (a)      No Operator Contract:

                  Inward Operator Assistance (Toll Center (TC) Code plus 121) -
                  The LSP may choose from two interconnection options for Inward
                  Operator Assistance as follows:

                  Option 1 - Interexchange Carrier (IXC) Carrier

                  The LSP may utilize the Interexchange Carrier Network (see
                  Scenario 6). The LSP operator will route its calls requiring
                  inward operator assistance through its designated IXC POP to
                  SWBT's TOPS tandem. SWBT shall route its calls requiring
                  inward operator assistance to the LSP's Designated Operator
                  Switch (TTC) through the designated IXC POP.

                  Option 2 - The LSP Operator Switch

                  The LSP reports its switch as the designated serving operator
                  switch (TTC) for its NPA-NXXs and requests SWBT to route its
                  calls requiring inward operator assistance to the LSP. This
                  option requires a segregated two-way (with MF signaling) trunk
                  group from SWBT's Access Tandem to the the LSP switch. The
                  traffic use code and modifier for this trunk group should be
                  OAJ (see Scenario 7). The LSP's operator will route its calls
                  requiring inward operator assistance to SWBT's operator over
                  an IXC network.

         (b)      Operator Contract with SWBT:

                  (i)      Directory Assistance (DA):

                           The LSP may contract for DA services only. A
                           segregated trunk group for these services would be
                           required to SWBT's TOPS tandem. This trunk group is
                           set up as one-way outgoing only and utilizes MF and
                           Operator Services signaling. The traffic use code and
                           modifier for this trunk group should be DAJ (see
                           Scenario 5).



<PAGE>   108
                                                                    APPENDIX ITR
                                                                     Page 5 of 8


                  (ii)     Directory Assistance Call Completion (DACC):

                           The LSP contracting for DA services may also contract
                           for DACC. This requires a segregated one-way trunk
                           group to SWBT's TOPS tandem. This trunk group is set
                           up as one-way outgoing only and utilizes MF
                           signaling. The traffic use code and modifier for this
                           trunk group should be DACCJ (see Scenario 5).

                  (iii)    Busy Line Verification:

                           When SWBT's operator is under contract to verify the
                           LSP's end user loop, SWBT will utilize a segregated
                           one-way with MF signaling trunk group from SWBT's
                           Access Tandem to the the LSP switch. The traffic use
                           code and modifier for this trunk group should be VRJ
                           (see Scenario 5).

                  (iv)     Operator Assistance (0+, 0-):

                           This service requires a one-way trunk group from the
                           the LSP switch to SWBT's TOPS tandem. Two types of
                           trunk groups may be utilized. If the trunk group
                           transports DA/DACC, the trunk group will be
                           designated as ETCMFJ (0-, 0+, DA, DACC) (see Scenario
                           5). If DA is not required or is transported on a
                           segregated trunk group, then the group will be
                           designated as ETCM2J (see Scenario 5). MF and
                           Operator Services signaling will be required on the
                           trunk group.

VII.     Trunk Design Blocking Criteria

         Trunk forecasting and servicing for the Local and IntraLATA Toll trunk
         groups shall be based on the industry standard objective of 2% overall
         time consistent average busy season busy hour loads (1% from the End
         Office to the Tandem and 1% from the Tandem to the End Office based on
         Neil Wilkinson B.01M [Medium Day-to-Day Variation] until traffic data
         is available). Listed below are the trunk group types and their
         objectives:

         Trunk Group Type                 Blocking Objective (Neil Wilkinson M)
         ----------------------------------------------------------------------
         Local Tandem                                      1%
         Local Direct                                      2%
         IntraLATA Interexchange                           1%
         911                                               1%
         Operator Services (DA/DACC)                       1%
         Operator Services (0+, 0-)                        0.5%
         InterLATA Tandem                                  0.5%


<PAGE>   109
                                                                    APPENDIX ITR
                                                                     Page 6 of 8


VIII.    FORECASTING/SERVICING RESPONSIBILITIES

         Both Parties agree to provide an initial forecast for establishing the
         initial interconnection facilities. Subsequent forecasts will be
         provided on a semi-annual basis concurrent with the publication of the
         SWBT General Trunk Forecast including yearly forecasted trunk
         quantities for all trunk groups described in this Appendix for a
         minimum of three years and the use of Common Language Location
         Identifier (CLLI-MSG) which is described in Bellcore documents
         BR795-100-100 and BR795-400-100. Trunk servicing will be performed on a
         monthly basis at a minimum.

         SWBT shall be responsible for forecasting and servicing the trunk
         groups terminating to the LSP. The LSP shall be responsible for
         forecasting and servicing the trunk groups terminating to SWBT end
         users and/or to be used for tandem transit to other provider's
         networks, operator services and DA service, and interLATA toll service.
         Standard trunk traffic engineering methods will be used as described in
         Bell Communications Research, Inc. (Bellcore) document SR-TAP-000191,
         Trunk Traffic Engineering Concepts and Applications.

IX.      TRUNK SERVICING

         1.       Orders between the Parties to establish, add, change or
                  disconnect trunks shall be processed by use of an Access
                  Service Request ("ASR").

         2.       All Parties shall jointly manage the capacity of local
                  Interconnection Trunk Groups. Either Party may send the other
                  Party an ASR to initiate changes to the Local Interconnection
                  Trunk Groups that the ordering Party desires based on the
                  ordering Party's capacity assessment. The receiving Party will
                  issue a Firm Order Confrontation ("FOC") and a Design Layout
                  Record ("DLR") to the ordering Party within five (5) business
                  days after receipt of the ASR.

         3.       Orders that comprise a major project (i.e., new switch
                  deployment) shall be submitted in a timely fashion, and their
                  implementation shall be jointly planned and coordinated.

         4.       SWBT will process trunk service requests submitted via a
                  properly completed ASR within twenty (20) business days of
                  receipt of such ASR. Facilities must also be in place before
                  trunk orders can be completed.

         5.       In the event that a Party requires trunk servicing within
                  shorter time intervals than those provided for in this Article
                  XI due to a bona fide end user demand, such Party may
                  designate its ASR as an "Expedite" and the other Party shall
                  use best efforts to issue its FOC and DLR and install service
                  within the requested interval.

         6.       Each Party shall be responsible for engineering their networks
                  on their side of the NIP.



<PAGE>   110
                                                                    APPENDIX ITR
                                                                     Page 7 of 8


X.       SERVICING OBJECTIVE/DATA EXCHANGE

         Each Party agrees to service trunk groups to the foregoing blocking
         criteria in a timely manner when trunk groups exceed measured blocking
         thresholds on an average time consistent busy hour for a 20 business
         day study period. Upon request, each Party will make available to the
         other, trunk group measurement reports for trunk groups terminating in
         the requesting Party's network. These reports will contain offered
         load, measured in CCS (100 call seconds), that has been adjusted to
         consider the effects of overflow, retrials and day-to-day variation.
         They will also contain overflow CCS associated with the offered load,
         day-to-day variation, peakedness factor, the date of the last week in
         the four week study period and the number of valid days of measurement.
         These reports shall be made available at a minimum on a semi-annual
         basis upon request.

XI.      SPECIFICATIONS

         All DS-1 and DS-3 facilities utilized for trunking established or
         employed by the Parties for purposes of this STC shall meet the
         specifications set forth in SWBT's TP-76625 dated June, 1990 and
         TP-76839 dated January, 1996.

XII.     TRUNK FACILITY UNDER UTILIZATION

         At least once a year the Parties shall exchange trunk group measurement
         reports as detailed above for trunk groups terminating to the other
         Party's network. Each Party will determine the required trunks for each
         of the other Party's trunk groups for the previous 12 months. Required
         trunks will be based on the Blocking Objectives under "Trunk Design
         Blocking Criteria" above and time consistent average busy hour usage
         measurements from the highest 4 consecutive week (20 business day)
         study. Trunk groups with excess capacity will be identified to the
         other Party as eligible for downsizing. Excess capacity exists when a
         trunk group, on a modular trunk group design basis, has 48 trunks (2
         modular digroups) or 10%, whichever is larger, over the required number
         of trunks.

         The party with excess trunking capacity will assess the trunk capacity
         based on forecasted requirements and agrees to disconnect trunks in
         excess of forecasted requirements for the next 12 months. If after 12
         months the trunk group continues to have excess capacity the party
         agrees to take timely steps to disconnect all excess capacity.

XIII.    Where available and upon the request of the other Party, each Party
         shall cooperate to ensure that its trunk groups are configured
         utilizing the B8ZS ESF protocol for 64 kbps clear channel transmission
         to allow for ISDN interoperability between the Parties' respective
         networks.



<PAGE>   111
                                                                    APPENDIX ITR
                                                                     Page 8 of 8


XIV.     INSTALLATION, MAINTENANCE, TESTING AND REPAIR. SWBT's standard
         intervals for Feature Group D Switched Exchange Access Services will be
         used for Interconnection trunks as specified in the most current SWBT
         Accessible Letter, currently SWA96-036, dated April 15, 1996. The LSP
         shall meet the same intervals for comparable installations,
         maintenance, joint testing, and repair of its facilities and services
         associated with or used in conjunction with Interconnection or shall
         notify SWBT of its inability to do so and will negotiate such intervals
         in good faith.


<PAGE>   112
                                                        APPENDIX ITR - SCENARIOS
                                                                     PAGE 1 OF 7



                                   SCENARIO 1

              SINGLE RATE AREA - COMBINED SWBT LOCAL/ACCESS TANDEM

                WITHOUT DIRECT END OFFICE, ILEC OR IXC TRUNKING





                                    GRAPHIC








TRAFFIC USE/MODIFIER                    DESCRIPTION

1.  DDJ                                 INTRALATA AND LOCAL (SS7 SIGNALING)
2.  TCJ                                 INTRALATA AND LOCAL (SS7 SIGNALING)
3.  TOCRJ                               MASS CALLING (MF SIGNALING)
4.  DD800J                              INTRALATA 800 (MAXIMIZER 800)(SS7
                                        SIGNALING) #
5.  MDJ                                 INTERLATA ONLY (MF SIGNALING) @
6.  MDJ                                 INTERLATA ONLY (SS7 SIGNALING)
7.  ESJ                                 EMERGENCY SERVICE (MF SIGNALING)

@ REQUIRED AT THE DALLAS 4 ESS SWITCH ONLY FOR 10XXXX # CUT THROUGH AND FEATURE
  GROUP B OVER D.
# REQUIRED IF SWBT DOES NOT PERFORM THE DATABASE QUERY FOR THE LSP.

                                                                 REVISED 6/17/96

                                                                        LSP1.AF3


<PAGE>   113

                                                        APPENDIX ITR - SCENARIOS
                                                                     PAGE 2 OF 7



                                   SCENARIO 2

              SINGLE RATE AREA - COMBINED SWBT LOCAL/ACCESS TANDEM

               WITH SOME DIRECT END OFFICE, ILEC OR IXC TRUNKING






                                    GRAPHIC





TRAFFIC USE/MODIFIER                    DESCRIPTION

1.  IEJ                                 LOCAL ONLY (SS7 SIGNALING)
2.  IEJ                                 LOCAL ONLY (SS7 SIGNALING)
3.  DDJ                                 INTRALATA AND LOCAL (SS7 SIGNALING)
4.  TCJ                                 INTRALATA AND LOCAL (SS7 SIGNALING)
5.  TOCRJ                               MASS CALLING (MF SIGNALING)
6.  DD800J                              INTERLATA 800 (MAXIMIZER 800)(SS7
                                        SIGNALING) #
7.  MDJ                                 INTERLATA ONLY (MF SIGNALING) @
8.  MDJ                                 INTERLATA ONLY (SS7 SIGNALING)
9.  ESJ                                 EMERGENCY SERVICE (MF SIGNALING)

@ REQUIRED AT THE DALLAS 4 ESS SWITCH ONLY FOR 10XXXX # CUT THROUGH AND FEATURE
GROUP B OVER D.
# REQUIRED IF SWBT DOES NOT PERFORM THE DATABASE QUERY FOR THE LSP.


                                                                 REVISED 6/17/96

                                                                        LSP2.AF3


<PAGE>   114

                                                        APPENDIX ITR - SCENARIOS
                                                                     PAGE 3 OF 7



                                   SCENARIO 3

               SINGLE RATE AREA - SEPARATE SWBT LOCAL AND ACCESS

            TANDEMS WITHOUT DIRECT END OFFICE, ILEC OR IXC TRUNKING






                                    GRAPHIC





TRAFFIC USE/MODIFIER                     DESCRIPTION

1.  TOJ                                  LOCAL ONLY (SS7 SIGNALING)
2.  TGJ                                  LOCAL ONLY (SS7 SIGNALING)
3.  TOCRJ                                MASS CALLING (MF SIGNALING)
4.  DD800J                               INTERLATA 800 (MAXIMIZER 800)(SS7
                                         SIGNALING) #
5.  DDJ                                  INTRALATA ONLY (SS7 SIGNALING)
6.  TCJ                                  INTRALATA ONLY (SS7 SIGNALING)
7.  MDJ                                  INTERLATA ONLY (SS7 SIGNALING)
8.  ESJ                                  EMERGENCY SERVICE (MF SIGNALING)

#    REQUIRED IF SWBT DOES NOT PERFORM THE DATABASE QUERY FOR THE LSP.


                                                                REVISED 12/30/96

                                                                        LSP3.AF3


<PAGE>   115

                                                        APPENDIX ITR - SCENARIOS
                                                                     PAGE 4 OF 7



                                   SCENARIO 4

               SINGLE RATE AREA - SEPARATE SWBT LOCAL AND ACCESS

           TANDEMS WITH SOME DIRECT END OFFICE, ILEC OR IXC TRUNKING






                                    GRAPHIC





TRAFFIC USE/MODIFIER                     DESCRIPTION

1.   IEJ                                 LOCAL ONLY (SS7 SIGNALING)
2.   IEJ                                 LOCAL ONLY (SS7 SIGNALING)
3.   TOJ                                 LOCAL ONLY (SS7 SIGNALING)
4.   TGJ                                 LOCAL ONLY (SS7 SIGNALING)
5.   TOCRJ                               MASS CALLING (MF SIGNALING)
6.   DD800J                              INTRALATA 800 (MAXIMIZER 800)(SS7
                                         SIGNALING) #
7.   DDJ                                 INTRALATA ONLY (SS7 SIGNALING)
8.   TCJ                                 INTRALATA ONLY (SS7 SIGNALING)
9.   MDJ                                 INTERLATA ONLY (SS7 SIGNALING)
10.  ESJ                                 EMERGENCY SERVICE (MF SIGNALING)

#    REQUIRED IF SWBT DOES NOT PERFORM THE DATABASE QUERY FOR THE LSP.


                                                                REVISED 12/30/96

                                                                        LSP4.AF3


<PAGE>   116

                                                        APPENDIX ITR - SCENARIOS
                                                                     PAGE 5 OF 7



                                   SCENARIO 5

              SINGLE RATE AREA - COMBINED SWBT LOCAL/ACCESS TANDEM

            WHERE SWBT IS THE OPERATOR SERVICES PROVIDER FOR THE LSP






                                    GRAPHIC







TRAFFIC USE/MODIFIER  DESCRIPTION

1.  VRJ               BUSY LINE VERIFICATION (MF SIGNALING) #
2.  DAJ OR DACCJ      DIRECTORY ASSISTANCE OR DIRECTORY ASSISTANCE CALL
                      COMPLETION (MF SIGNALING, OPERATOR SERVICES SIGNALING)
3.  ETCM2J            0-, 0+ COMBINED COIN AND NONCOIN (MF SIGNALING, OPERATOR
                      SERVICES SIGNALING)
4.  ETCMFJ            0-, 0+, DA, DACC COMBINED COIN AND NONCOIN (MF SIGNALING,
                      OPERATOR SERVICES SIGNALING)

# BUSY LINE VERIFICATION IS SOMETIMES TRUNKED OUT FROM THE TOPS TANDEM RATHER
THAN THE ACCESS TANDEM.

                                                                  REVISED 1/7/97

                                                                        LSP5.AF3


<PAGE>   117

                                                        APPENDIX ITR - SCENARIOS
                                                                     PAGE 6 OF 7



                                   SCENARIO 6

              SINGLE RATE AREA - COMBINED SWBT LOCAL/ACCESS TANDEM

          WHERE SWBT IS NOT THE OPERATOR SERVICES PROVIDER FOR THE LSP

                         121 INWARD OPERATOR ASSISTANCE









                                    GRAPHIC








NOTE:  THIS SCENARIO WOULD USE EXISTING INTEREXCHANGE CARRIER NETWORK.



                                                                 REVISED 6/17/96

                                                                        LSP6.AF3


<PAGE>   118

                                                        APPENDIX ITR - SCENARIOS
                                                                     PAGE 7 OF 7



                                   SCENARIO 7

              SINGLE RATE AREA - COMBINED SWBT LOCAL/ACCESS TANDEM

                WHERE SWBT IS NOT THE OPERATOR SERVICES PROVIDER

               FOR THE LSP AND THE LSP'S SWITCH IS THE DESIGNATED

                OPERATOR SWITCH (TTC) FOR 121 INWARD ASSISTANCE






                                    GRAPHIC







TRAFFIC USE/MODIFIER  DESCRIPTION

1.  OAJ               ACCESS TO INWARD OPERATOR (121)(MF SIGNALING)

                                                                 REVISED 6/17/96

                                                                        LSP7.AF3



<PAGE>   119
                                                                   APPENDIX LIDB
                                                                    PAGE 2 OF 14


                                  APPENDIX LIDB

             AGREEMENT FOR THE PROVISION OF DATA BASE ADMINISTRATION
                                       AND
                    LINE INFORMATION DATA BASE (LIDB) STORAGE

This Appendix, between SWBT and LSP sets forth the terms and conditions upon
which SWBT will provide data base administration to store LSP's line/billing
records in SWBT's Line Information Data Base (LIDB).

WHEREAS, SWBT owns and maintains a Line Validation Administration System (LVAS)
that provides facilities for adding, deleting, and changing information in LIDB;
and

WHEREAS, SWBT maintains LIDB for various purposes, including the validation of
alternately billed service (ABS) requests and the provision of other services;
and

WHEREAS LSP desires to have SWBT use LVAS to administer LSP's line information
cords for the provision of services set forth in the exhibits attached to this
Appendix; and

WHEREAS SWBT is willing to provide, where equipment, processing capability and
hardware configurations permit, such LVAS services and LIDB storage for LSP; and

WHEREAS, SWBT owns and maintains a Sleuth System that provides facilities for
ABS fraud monitoring; and

WHEREAS LSP desires SWBT to use its Sleuth System for ABS fraud monitoring of
its telecommunications traffic.

NOW, THEREFORE, in consideration of the mutual promises and undertakings made,
the parties agree as follows:

1.       DEFINITIONS

         As used herein and for the purpose of this Appendix, the following
         terms shall have the meanings set forth below:

         A.       Alternate Billing Services (ABS) - A service that allows end
                  users to bill calls to accounts that may not be associated
                  with the originating line. There are three types of ABS calls:
                  calling card, collect and third number billed calls.

         B.       Billed Number Screening (BNS) - A process which utilizes a
                  database to determine specific characteristics and/or end user
                  preferences with respect to a billed number.

<PAGE>   120
                                                                   APPENDIX LIDB
                                                                    PAGE 3 OF 14


         C.       Calling Card Service (CCS) - A service which enables a calling
                  customer to bill a telephone call to a calling card number
                  with or without the help of an operator.

         D.       Data Base - An integrated collection of related data. In the
                  case of the LIDB, the data base is the line number and related
                  line information.

         E.       Data Base Administration Center (DBAC) - The LIDB input center
                  where the LVAS facility and administrative personnel are
                  currently located.

         F.       Exchange - For the purpose of this Appendix, a specific 
                  NPA-NXX combination.

         G.       Group  Record -  Information  in LIDB or LVAS that is common 
                  to all lines or  billing  records  in an NPA-NXX or NPA-RAO.

         H.       LIDB Editor - A database editor located at the SCP where LIDB
                  resides. LIDB ditor provides emergency access to LIDB that
                  bypasses the service management system for LIDB.

         I.       Line Validation Administration System (LVAS) - An off-line
                  administrative system, used by SWBT to add, delete and change
                  information in LIDB.

         J.       Line Information Data Base (LIDB) - The line information
                  database, which is an ANSI SS7 database system, functions as a
                  centralized repository for data storage and retrieval. LIDB
                  supports validation and recording of ABS requests. LIDB also
                  supports storage, retrieval and recording capabilities for
                  other information that can be associated with an end user's
                  line. Examples of such information are, or are expected to be,
                  originating screening information, ZIP code data and calling
                  name.

         K.       Line  Record -  Information  in LIDB or LVAS that is  specific
                  to a single  telephone  number or special  billing number.

         L.       Personal Identification Number (PIN) - A confidential four
                  digit code number provided to a calling card customer to
                  prevent unauthorized use of his/her calling card number. The
                  PIN is stored in the LIDB for those line numbers that have an
                  associated calling card.

         M.       Response - A single response in a set of predefined expected
                  responses to a request for information contained in a query
                  from a computer processor.

<PAGE>   121
                                                                   APPENDIX LIDB
                                                                    PAGE 4 OF 14


         N.       Toll Billing  Exception  (TBE) - A LIDB option that allows end
                  users to restrict  third number  billing or collect calls to
                  their lines.

         O.       Service Management System (SMS) - An off-line system used to
                  access, create, modify, or update information in LIDB. For the
                  purposes of this appendix, the SMS for LIDB is LVAS.

         P.       Sleuth - An off-line administration system that SWBT uses to
                  monitor suspected occurrences of ABS-related fraud. Sleuth
                  uses a systematic pattern analysis of query message data to
                  identify potential incidences requiring fraud investigation.
                  Detection parameters are based upon vendor recommendations and
                  SWBT's analysis of collected data and are subject to change
                  from time to time.

         Q.       Special Billing Number (SBN) Account Groups - Line records in
                  LIDB that are based on an NPA-RAO numbering format. NPA-RAO
                  numbering formats are similar to NPA-NXX formats except that
                  the fourth digit of an NPA-RAO line record is either a zero
                  (0) or a one (1).

         R.       Tape Load Facility - A separate data entry point at the SCP
                  where LIDB resides. The Tape Load Facility provides direct
                  access to LIDB for data administration that bypasses the 
                  service management system for SWBT's LIDB.

         S.       Translation Type - A code in the Signaling Connection Control
                  Point (SCCP) of the SS7 signaling message. Translation Types
                  are used for routing LIDB queries. Signal Transfer Points
                  (STPs) use Translation Types to identify the routing table
                  used to route a LIDB query. All LIDB queries against the same
                  exchange and Translation Type are routed to the same LIDB.

2.       General Description

         A.       SWBT's LIDB is connected directly to a service management
                  system (i.e., LVAS), a database editor (i.e., LIDB Editor),
                  and a tape load facility. Each of these facilities, processes,
                  or systems, provide SWBT with the capability of creating,
                  modifying, changing, or deleting, line/billing records in
                  LIDB. SWBT's LIDB is also connected directly to an adjunct
                  fraud monitoring system (i.e., Sleuth).

         B.       SWBT will provide LSP with access to LVAS, LIDB Editor, and
                  tape load facility as set forth in this Appendix and the
                  Exhibit or Exhibits attached hereto. SWBT warrants that the
                  manner in which it provides such access to LSP will be
                  equivalent to the manner in which SWBT provides such access to
                  itself.

<PAGE>   122
                                                                   APPENDIX LIDB
                                                                    PAGE 5 OF 14


         C.       SWBT will also provide LSP with fraud alerts from Sleuth as
                  set forth in this Appendix and in Exhibit IV (Sleuth). SWBT
                  warrants that it will provide fraud alerts to LSP using the
                  same fraud monitoring parameters as SWBT uses for itself.

         D.       From time-to-tome, SWBT enhances its LIDB to create new
                  services and/or LIDB functionalities. Such enhancements may
                  involve the creation of new line-level or group-level data
                  elements in LIDB. SWBT will coordinate with LSP to provide LSP
                  with the opportunity to update its data concurrent with SWBT's
                  updates of SWBT's own data. Both parties understand and agree
                  that some LIDB enhancements will require LSP to update its
                  line/billing records with new or different information.

         E.       Charges for the provisioning of Data Base Administration and
                  LIDB Storage are set forth in Exhibit II (Basis of
                  Compensation).

3.       Service Description

         3.1      LVAS

                  LVAS provides LSP with the capability to access, create,
modify or update information in LIDB. LVAS has two electronic interfaces. These
interfaces are the Service Order Entry Interface and the Interactive Interface.

                  3.1.1    Service Order Entry Interface

                           (A)      The Service Order Entry Interface provides
                                    LSP with unbundled access to SWBT's LVAS
                                    that is equivalent to SWBT's own service
                                    order entry process to LVAS. Service Order
                                    Entry Interface allows LSP to electronically
                                    transmit properly formatted records from
                                    LSP's service order process into LVAS.

                           (B)      LSP's access to the Service Order Entry
                                    Interface will be through a remote access
                                    facility (RAF). The RAF will provide SWBT
                                    with a security gateway for LSP access to
                                    the Service Order Entry Interface. The RAF
                                    will verify the validity of LSP's
                                    transmissions and limit LSP's access to
                                    SWBT's Service Order Entry Interface to
                                    LVAS. LSP does not gain access to any other
                                    SMS, interface, database, or operations
                                    support system through this Appendix.

<PAGE>   123
                                                                   APPENDIX LIDB
                                                                    PAGE 6 OF 14


                           (C)      SWBT will provide LSP with the file transfer
                                    protocol specifications LSP will use to
                                    administer LSP's data over the Service Order
                                    Entry Interface. LSP acknowledges that
                                    transmission in such specified protocol is
                                    necessary for SWBT to provide LSP with Data
                                    Base Administration and Storage.

                           (D)      LSP can choose the Service Order Entry
                                    Interface as its only interface to LVAS and
                                    LIDB or the LSP can choose to use this
                                    interface in conjunction with any other
                                    interface that SWBT provides under this
                                    Appendix except the Manual Interface.

                           (E)      SWBT will provide LSP with SWBT-specific
                                    documentation for properly formatting the
                                    records LSP will transmit over the Service
                                    Order Entry Interface.

                           (F)      LSP understands that its record access
                                    through the Service Order Entry Interface
                                    will be limited to its own line/billing
                                    records.

                  3.1.2    Interactive Interface

                           (A)      The Interactive Interface provides LSP with
                                    unbundled access to SWBT's LVAS that is
                                    equivalent to SWBT's access at its LIDB
                                    DBAC. Interactive Interface provides LSP
                                    with the ability to have its own personnel
                                    access LSP's records via an application
                                    screen that is presented on a computer
                                    monitor. Once LSP has accessed one of its
                                    line/billing records, LSP can perform all of
                                    the data administration tasks SWBT's LIDB
                                    DBAC personnel can perform on SWBT
                                    line/billing records.

                           (B)      SWBT will provide LSP with Interactive
                                    Interface through a modem. LSP understands
                                    that its record access through the
                                    Interactive Interface will be limited to its
                                    own line/billing records.

                           (C)      LSP will use hardware and software that is
                                    compatible with LVAS hardware and software.

                           (D)      LSP can choose to request the Interactive
                                    Interface as its only interface to LVAS and
                                    LIDB or the LSP can choose to use this
                                    interface in conjunction with any other
                                    interface that SWBT provides under this
                                    Appendix except the Manual Interface.

<PAGE>   124
                                                                   APPENDIX LIDB
                                                                    PAGE 7 OF 14


                           (E)      SWBT will provide LSP with SWBT-specific
                                    documentation in the form of screen prints
                                    and prints of help screens.

                  3.1.3    Manual Interface

                           (A)      Manual Interface is available only if the
                                    LSP has 1,000 line/billing records or less.
                                    Manual Interface allows LSP to fax updates
                                    to SWBT's LIDB DBAC. SWBT's LIDB DBAC
                                    personnel will manually enter these faxed
                                    updates into LVAS for LSP.

                           (B)      Manual Interface is not available with any 
                                    other interface SWBT provides under this 
                                    Appendix.

                           (C)      LSP understands that its record access
                                    through the Manual Interface will be limited
                                    to its own line/billing records.

         3.2      Tape Load Facility Interface

                  (A)      Tape Load Facility Interface provides LSP with
                           unbundled access to SWBT's Tape Load Facility in the
                           same manner that SWBT accesses this facility. Tape
                           Load Facility Interface allows LSP to create and
                           submit magnetic tapes for input into LIDB.

                  (B)      The Tape Load Facility Interface is not an interface
                           to LVAS. The Tape Load Facility Interface is an entry
                           point to LIDB at the SCP where LIDB resides.

                  (C)      The Tape Load Facility Interface is available only
                           when the amount of information is too large for LVAS
                           to accommodate. Both parties agree that these
                           situations normally occur during the initial load of
                           LSP's information into LIDB or when LIDB is updated
                           for a new product. The Tape Load Facility Interface
                           is not available for ongoing updates of information.
                           LSP may request the Tape Load Facility Interface only
                           when its updates exceed 100,000 line/billing records
                           over and above the LSP's normal daily update
                           processing.

                  (D)      LSP will create its own tapes in formats specified in
                           GR-446-CORE, Issue 2, June 1994, as revised. Such
                           tapes will only include information associated with
                           LSP's line/billing records.

                  (E)      LSP will deliver a separate set of tapes, each having
                           identical information to each SCP node on which LIDB
                           resides. SWBT will 

<PAGE>   125
                                                                   APPENDIX LIDB
                                                                    PAGE 8 OF 14


                           provide LSP with the name and address of the SWBT 
                           employee designated to receive the tapes at each 
                           location.

                  (F)      In  addition to the tapes LSP will create and  
                           deliver to the SCP node locations,  LSP shall deliver
                           an  additional  set  of  tapes  to  the  LVAS  System
                           Administrator  so that  SWBT can load  LSP's  updates
                           into LVAS. LSP understand that these additional tapes
                           must  contain  information  identical  to  the  tapes
                           delivered to the SCP nodes,  but that the format will
                           differ.   SWBT  shall   provide   LSP   SWBT-specific
                           documentation   for   record   formations   of  these
                           additional  tapes.  SWBT  shall  use  these  tapes to
                           create LSP records in LVAS that  correspond  with the
                           records  being  loaded  into LIDB using the Tape Load
                           Facility  Interface.  SWBT shall provide LSP with the
                           name and address of the SWBT System  Administrator to
                           whom the LVAS update tapes should be sent.

                  (G)      SWBT and LSP shall negotiate mutually agreed upon
                           dates and times for tape loads of LSP data when such
                           loads are the result of an LSP request.

                  (H)      LSP understands and agrees that its record access
                           through the Tape Load Facility Interface is only for
                           LSP's own line/billing records. LSP warrants that it
                           shall not use the Tape Load Facility Interface to
                           modify any group record. LSP further warrants that it
                           shall not use the Tape Load Facility Interface to
                           modify any line/billing record not belonging to LSP.

         3.3      LIDB Editor Interface

                  (A)      LIDB Editor Interface provides LSP with unbundled
                           access to SWBT's LIDB Editor equivalent to SWBT's
                           manner of access. LIDB Editor provides LSP with
                           emergency access to LIDB only when LVAS is unable to
                           access LIDB or is otherwise inoperable.

                  (B)      LIDB Editor Interface is not an interface to LVAS.
                           LIDB Editor is an SCP tool accessible only by
                           authorized SWBT employees. LSP shall have access to
                           SWBT employees authorized to access LIDB Editor
                           during the same times and under the same conditions
                           that SWBT has access to LIDB Editor.

                  (C)      LSP understands that its record access through the
                           LIDB Editor Interface is limited to its own
                           line/billing records.

<PAGE>   126
                                                                   APPENDIX LIDB
                                                                    PAGE 9 OF 14


         3.4      Audits

                  SWBT shall provide LSP with access equivalent to SWBT's own
                  access to LVAS audit functionalities.

                  3.4.1    LIDB Audits

                           (A)      This audit is between LVAS and LIDB. This
                                    audit verifies that LVAS records match LIDB
                                    records. The LIDB Audit is against all line
                                    records and group record information in LVAS
                                    and LIDB, regardless of data ownership.

                           (B)      SWBT shall run the LIDB audit continuously
                                    throughout each and every day.

                           (C)      SWBT shall create a "variance file" of all
                                    LSP records that fail the LIDB audit. LSP
                                    can access these files through the
                                    Interactive Interface.

                           (D)      LSP shall investigate accounts that fail the
                                    LIDB audit and correct any discrepancies as
                                    set forth in paragraph 3(H). LSP shall
                                    correct all discrepancies using the LVAS
                                    interface(s) LSP has requested under this
                                    Appendix.

                  3.4.2    Billing System Audit

                           (A)      This type of audit is between LVAS and
                                    SWBT's billing system(s). This audit
                                    verifies that LVAS records match SWBT's
                                    billing system records.

                           (B)      SWBT shall provide LSP with access
                                    equivalent to SWBT's own access to the
                                    billing system audit functionality. SWBT
                                    shall provide LSP with a file containing LSP
                                    records in LIDB. LSP shall specify if the
                                    billing system audit tape will be delivered
                                    by either magnetic tape or electronically
                                    over the Service Order Entry Interface.

                           (C)      LSP shall audit its LIDB accounts against
                                    LSP's billing system and correct any
                                    discrepancies as set forth in paragraph
                                    3(H). LSP shall correct all discrepancies
                                    using the LVAS interface(s) LSP has
                                    requested under this Appendix.

                           (C)      SWBT shall provide LSP scheduled and 
                                    unscheduled billing system audits as set 
                                    forth below:

<PAGE>   127
                                                                   APPENDIX LIDB
                                                                   PAGE 10 OF 14

                                    (1)     Scheduled Audits

                                            SWBT shall provide LSP with a
                                            billing system audit file twice per
                                            year. Such audit files will
                                            represent LSP's entire data store in
                                            LVAS. The Parties shall mutually
                                            agree upon the dates such audit
                                            files will be provided.

                                    (2)     Unscheduled Audits

                                            LSP can request additional audit
                                            files and SWBT will work
                                            cooperatively to accommodate all
                                            reasonable LSP requests for such
                                            additional audit files. Charges for
                                            additional audit files shall apply
                                            as set forth in Exhibit II (Basis
                                            for Compensation).

                  3.5      Sleuth

                           (A)      Sleuth notification provides LSP with Sleuth
                                    alert messages. Sleuth alert messages
                                    indicate potential incidences of ABS-related
                                    fraud for investigation.

                           (B)      Sleuth historical reports are available to 
                                    LSP as set forth in Exhibit IV (Sleuth).

3.       Manner of Provisioning

         (A)      SWBT shall provide to LSP, on request, SWBT-specific
                  documentation regarding record formatting and associated
                  hardware requirements for LSP to access each of the interfaces
                  SWBT provides for LIDB data administration.

         (B)      LSP shall obtain, at its own expense, all necessary 
                  documentation produced by non-SWBT entities such as Bellcore.

         (C)      Magnetic tapes submitted by LSP must conform to the hardware
                  specifications of each SCP node where LIDB resides. This
                  includes 9-track and 8mm tapes as well as other site-specific
                  limitations. SWBT shall provide LSP with all magnetic tape
                  hardware requirements upon request. LSP shall create the
                  magnetic tapes its submits for input into LIDB and LVAS over
                  the tape load interface.

         (D)      SWBT shall input information provided by LSP into LIDB for the
                  NPA-NXXs and/or NPA-RAOs set forth in Exhibit I, EXCHANGES TO
                  BE ADMINISTERED, attached hereto and made a part hereof. LSP
                  shall provide 

<PAGE>   128
                                                                   APPENDIX LIDB
                                                                   PAGE 11 OF 14

                  all  information  needed by SWBT to support the services being
                  requested.  This  information may include,  but is not limited
                  to,  Calling Card  Service  information,  Toll Bill  Exception
                  information  (such as restrictions on collect and third number
                  billing),  class  of  service  information,  originating  line
                  number  screening  information,   ZIP  code  information,  and
                  calling name information.

         (E)      LSP shall furnish, prior to the initial LVAS load, and as
                  requested by SWBT thereafter, the following forecast data:

                  -   the number of working lines per account group
                  -   the number of working line numbers to be established 
                  -   the average number of monthly changes to these records 
                  -   the number of busy hour queries, by query type 
                  -   the number of annual queries by query type

                  If SWBT, at its discretion, determines that it lacks adequate
                  storage, or processing capability, prior to the initial
                  loading of LSP information, SWBT shall notify LSP of its
                  intent to not provide to LSP the Services under this Appendix
                  and this Appendix will be void.

         (F)      LSP shall furnish all line records and group records in a
                  format required by SWBT to establish records in LIDB for all
                  working line numbers, not just line numbers associated with
                  calling card PIN or Toll Billing Exceptions (TBE).

         (G)      LSP acknowledges that SWBT's LIDB is accessible by many
                  telecommunications companies and that these telecommunications
                  companies expect a high degree of accuracy in the response
                  information provided to their queries. LSP shall administer 
                  its data in such a manner that SWBT's accuracy of response
                  information is not adversely impacted.

         (H)      LSP shall verify to SWBT the line information data residing in
                  LVAS  by  reviewing  the  listing  of  line  information  data
                  provided  by  SWBT's  billing  system  audit  file.  LSP shall
                  provide  to SWBT all  additions,  deletions,  and  corrections
                  resulting from its verification on, or before,  the fourteenth
                  business  day  following  its  receipt  of  line   information
                  verification reports produced by SWBT for audit processes.

         (I)      SWBT shall provide the functionality needed to perform certain
                  query/response  functions  on a  call-by-call  basis  for  the
                  line/billing  records of LSP that reside in SWBT's LIDB. Those
                  query/response  functions  SWBT will  perform are set forth in
                  the Exhibits.

         (J)      With respect to all matters covered by this Appendix, each
                  Party shall adopt and comply with SWBT standard operating
                  methods and procedures and shall 

<PAGE>   129
                                                                   APPENDIX LIDB
                                                                   PAGE 12 OF 14


                  observe   the   rules   and   regulations   which   cover  the
                  administration  of LVAS service and the Sleuth System,  as set
                  forth in SWBT practices.  The Parties  acknowledge  that those
                  practices may be changed by SWBT from time to time.

         (K)      Administration of the SCP on which LIDB resides, as well as 
                  any system or query  processing logic that applies to all data
                  resident on SWBT's LIDB is, and remains, the responsibility of
                  SWBT.  LSP  acknowledges  that  SWBT,  in its  role as  system
                  administrator,   may  need  to  access  any  record  in  LIDB,
                  including  any such  records  of LSP.  SWBT  shall  limit such
                  access to those  actions  necessary  to ensure the  successful
                  operation and administration of SWBT's SCP and LIDB.

         (L)      LSP acknowledges that SWBT shall, in its sole discretion, 
                  allow or  negotiate  any access to SWBT's  LIDB.  LSP does not
                  gain any  ability,  by virtue of this  Appendix,  to determine
                  which  telecommunications  companies  are  allowed  to  access
                  information  in SWBT's LIDB. LSP  acknowledges  that when SWBT
                  allows a query  originator to access SWBT data in SWBT's LIDB,
                  such query  originators  shall also have  access to LSP's data
                  that is also stored in SWBT's LIDB.

         (M)      LSP acknowledges that SWBT does not have data screening
                  capability  in LIDB.  Data  Screening is the ability of a LIDB
                  owner to deny  complete  or  partial  access  to LIDB  data or
                  processes.

4.       Billing

         Compensation to SWBT for data storage and administration service and
         Sleuth services shall be based upon the rates set forth in Exhibit II
         (Basis of Compensation), attached hereto and made a part hereof. These
         rates will apply for one (1) year from the service effective date for
         each exchange. After one (1) year, SWBT may change the rates upon
         seventy-five (75) days' notice. SWBT may first give such notice
         seventy-five days before the end of the first year.

         4.1      SWBT Responsibilities

                  (A)      SWBT shall determine, for billing purposes, the
                           number of access lines that are administered for each
                           NPA-NXX or NPA-RAO for which SWBT performs the
                           database administration function on behalf of LSP.
                           SWBT shall quantify access lines monthly.

                  (B)      SWBT shall provide, upon written request, such data
                           as is reasonably necessary to verify billing charges
                           for data base administration update functions. SWBT
                           shall provide this information in standard SWBT LVAS
                           report formats.


<PAGE>   130
                                                                   APPENDIX LIDB
                                                                   PAGE 13 OF 14

                  (C)      SWBT shall provide such data, as is reasonably
                           necessary, to enable the independent Billing
                           Information Systems (IBIS) billing statements to be
                           substantiated for query volumes of LSP line/billing
                           records that reside in SWBT's LIDB. SWBT shall
                           provide this data to LSP in standard Exchange Message
                           Record (EMR) format.

         4.2      LSP Responsibilities

                  (A)      LSP shall pay SWBT the amounts billed for the 
                           services rendered.

                  (B)      LSP shall bill the appropriate charges to end users,
                           on behalf of third parties who query LIDB and receive
                           a response verifying the end user's willingness to
                           accept the charges for the underlying call.

                  (C)      LSP shall provide to third parties, that query LIDB
                           and receive a response verifying an end user's
                           willingness to accept charges of services supported
                           by LIDB, all necessary billing information needed by
                           the third party to bill for the services provided.

         4.3      Compensation for Data Access

                  (A)      Subject to the limitations in (B) below, SWBT shall
                           compensate LSP for queries against the data LSP
                           stores in SWBT's LIDB. Queries by SWBT and LSP
                           against the data LSP stores in SWBT's LIDB shall be
                           included in the count of queries for which LSP will
                           be compensated. SWBT shall compensate LSP by paying a
                           percentage of the amounts SWBT billed, or would have
                           billed, for each query. LSP acknowledges that the
                           amount SWBT bills for LIDB queries against LSP's data
                           may differ by query type, by query originator, and/or
                           may change over time. The percentage SWBT will use to
                           calculate such credits is set forth in Exhibit II
                           (Basis of Compensation).

                  (B)      LSP  acknowledges  that SWBT's  ability to provide 
                           such credit is based upon SWBT's  ability to identify
                           account ownership in LIDB. LSP acknowledges that LIDB
                           currently  identifies  account  ownership only at the
                           level of the group record (i.e., NPA-NXX or NPA-RAO).
                           LSP further  agrees  that SWBT will not provide  such
                           credit for LSP accounts  that reside in group records
                           that also contain SWBT or other data owner  accounts.
                           SWBT agrees to work with its LIDB and switch  vendors
                           to attempt to develop  the  capabilities  for SWBT to
                           identify,   and  record  for  billing,   the  service
                           provider of  individual  line/billing  records.  SWBT
                           shall  provide LSP  compensation  if SWBT  implements
                           such capabilities in its network.
<PAGE>   131
                                                                   APPENDIX LIDB
                                                                   PAGE 14 OF 14

5.       Liability

                  (A)      SWBT shall not be liable for any losses or damages
                           arising out of errors, interruptions, defects,
                           failures, or malfunction of LVAS, including any and
                           all associated equipment and data processing systems,
                           except such losses or damages caused by the sole
                           negligence of SWBT. Any losses or damages for which
                           SWBT is held liable under this Appendix shall in no
                           event exceed the amount of charges made for LVAS
                           during the period beginning at the time SWBT receives
                           notice of the error, interruption, defect, failure or
                           malfunction to the time service is restored.

                  (B)      SWBT shall not be liable for any losses or damages 
                           arising out of SWBT's administration of Sleuth.

                  (C)      SWBT SHALL NOT BE LIABLE IN ANY EVENT FOR ANY
                           SPECIAL, INDIRECT, INCIDENTAL, CONSEQUENTIAL, OR
                           EXEMPLARY DAMAGES RESULTING FROM, OR ARISING OUT OF,
                           OR IN CONNECTION WITH, THIS AGREEMENT.

                  (D)      LSP agrees to release, indemnify, defend, and hold
                           harmless SWBT from any and all claims, demands, or
                           suits brought by a third party against SWBT, directly
                           or indirectly, arising out of SWBT's provision of
                           service under this Appendix. This provision shall not
                           apply to any losses, damages or other liability for
                           which SWBT is found liable as a result of its sole
                           negligence.

6.       Disclaimer of Warranties

         SWBT MAKES NO REPRESENTATIONS OR WARRANTIES, EXPRESS OR IMPLIED,
         INCLUDING BUT NOT LIMITED TO ANY WARRANTY AS TO MERCHANTABILITY OR
         FITNESS FOR INTENDED OR PARTICULAR PURPOSE WITH RESPECT TO LVAS
         SERVICE, LIDB OR THE SLEUTH SYSTEM. ADDITIONALLY, SOUTHWESTERN BELL
         ASSUMES NO RESPONSIBLEILITY WITH REGARD TO THE CORRECTNESS OF THE DATA
         SUPPLIED BY LSP WHEN THIS DATA IS ACCESSED AND USED BY A THIRD PARTY.
<PAGE>   132
                                                                   APPENDIX LIDB
                                                                       EXHIBIT I
                                                                     PAGE 1 OF 1

                                  APPENDIX LIDB

                                    EXHIBIT I

                          EXCHANGES TO BE ADMINISTERED

SWBT shall provide service management system and other interface service
capabilities to LSP as set forth in this Appendix and attached Exhibit or
Exhibits for the following LSP exchanges:

        EXCHANGE NAME                      NPA NXX                  NPA-RAO

_______________________________     ___________________       _________________
_______________________________     ___________________       _________________
_______________________________     ___________________       _________________
_______________________________     ___________________       _________________
_______________________________     ___________________       _________________
_______________________________     ___________________       _________________
_______________________________     ___________________       _________________
_______________________________     ___________________       _________________
_______________________________     ___________________       _________________
_______________________________     ___________________       _________________
_______________________________     ___________________       _________________
_______________________________     ___________________       _________________
_______________________________     ___________________       _________________
_______________________________     ___________________       _________________
_______________________________     ___________________       _________________
_______________________________     ___________________       _________________
_______________________________     ___________________       _________________
_______________________________     ___________________       _________________
_______________________________     ___________________       _________________
_______________________________     ___________________       _________________
_______________________________     ___________________       _________________
_______________________________     ___________________       _________________
_______________________________     ___________________       _________________
_______________________________     ___________________       _________________

(Attach additional copies as needed)


<PAGE>   133
                                                                   APPENDIX LIDB
                                                                      EXHIBIT II
                                                                     PAGE 1 OF 1

                                  APPENDIX LIDB

                                   EXHIBIT II

                              BASIS OF COMPENSATION

1.       COMPENSATION :

All rates and charges contained in this section are applicable in all regulatory
jurisdictions.


2.       RATES AND CHARGES


             Manual Interface                             Rate Per Initial Load
                  (a)  Initial Load
                       (1)     per initial load                    $372.00
                       (2)     per 100 line records
                               loaded                              $ 55.00

                  (b)  Ongoing Updates                    Rate Per Month
                       (1)     per month                           $ 51.00
                       (2)     per 100 line records
                               stored in LIDB                      $  3.75

<PAGE>   134
                                                                   APPENDIX LIDB
                                                                     EXHIBIT III
                                                                     PAGE 1 OF 1

                                  APPENDIX LIDB

                                   EXHIBIT III

         CALLING CARD AND BILLED NUMBER SCREENING VALIDATION

         (A)      SWBT shall provide the functionality needed to perform the
                  following query/response functions, on a call-by-call basis,
                  for the line/billing records residing in SWBT's LIDB to:

                           1.       Validate a 14-digit billing number where the
                                    first 10 digits are a telephone number or a
                                    special billing number assigned and the last
                                    four digits (PIN) are a security code
                                    assignment.

                           2.       Determine whether the billed line
                                    automatically rejects, accepts, or requires
                                    verification of certain calls billed as
                                    collect or third number.

                           3.       Determine whether the billed line is a
                                    public telephone number using the Class of
                                    Service information in the LIDB.

         B.       LSP shall bill the appropriate charges to end users, on behalf
                  of third parties who query LIDB and receive a response
                  validating the end user's willingness to accept the charges
                  for the underlying call.

Approved and executed the _________________________ day of _________, 19___.


DIGITAL TELEPORT, INC. (MISSOURI)           SOUTHWESTERN BELL TELEPHONE COMPANY

By________________________________          By_____________________________

Title_____________________________          Title__________________________

Date______________________________          Date___________________________

<PAGE>   135
                                                                   APPENDIX LIDB
                                                                      EXHIBIT IV
                                                                     PAGE 1 OF 2
      

                                  APPENDIX LIDB

                                   EXHIBIT IV

                                     SLEUTH

         (A)      SWBT shall provide LSP with an alert notification, by fax, or
                  another mutually agreed upon format, when SWBT's Sleuth system
                  indicates the probability of a fraud incidence. SWBT will use
                  the same criteria to determine fraud alerts for LSP as SWBT
                  uses for its own accounts.

         (B)      Sleuth alert messages have four levels of priority. These
                  levels are low, medium, high and urgent. Sleuth delivers alert
                  messages to a queue in the Sleuth DBAC in priority order.
                  Urgent alerts are prioritized first, followed by high, medium
                  and low alerts (in that order).

         (C)      SWBT's Sleuth investigators can access alerts only in the
                  order the alerts appear in the queue. Low alerts almost never
                  see investigator treatment. However, when Sleuth encounters a
                  number of low priority alerts on the same account, Sleuth may
                  upgrade the alert's status to a higher priority status.

         (D)      When a Sleuth investigator determines that an urgent, high, or
                  medium priority alert is for an LSP account, the Sleuth
                  investigator will print the alert for the queue and fax the
                  alert to the LSP. Sleuth alerts only identify potential
                  occurrences of fraud. The LSP receiving Sleuth alerts will
                  need to perform its own investigations to determine whether a
                  fraud situation actually exists. The LSP will also need to
                  determine what, it any action should it take as a result of a
                  Sleuth alert.

         (E)      SWBT's hours of operation for Sleuth are seven days a week,
                  twenty-four hours per day (7X24). LSP shall provide SWBT with
                  a contact name and fax number for SWBT to fax alerts from
                  SWBT's Sleuth DBAC.

         (F)      SWBT shall provide LSP with a Sleuth contact name and number,
                  including fax number, for LSP to contact the Sleuth DBAC.

         (G)      For each alert notification SWBT provides to LSP, LSP may
                  request a corresponding 30-day historical report of
                  ABS-related query processing. LSP may request up to three
                  reports per alert. The charge for each historical report is
                  set forth in Exhibit II (Basis of Compensation).

<PAGE>   136
                                                                   APPENDIX LIDB
                                                                      EXHIBIT IV
                                                                     PAGE 2 OF 2



Approved and executed the _________________________ day of _________, 19___.


DIGITAL TELEPORT, INC. (MISSOURI)           SOUTHWESTERN BELL TELEPHONE COMPANY

By________________________________          By_____________________________

Title_____________________________          Title__________________________

Date______________________________          Date___________________________


<PAGE>   137
                                                                   APPENDIX LIDB
                                                                       EXHIBIT V
                                                                     PAGE 1 OF 1

                                  APPENDIX LIDB

                                    EXHIBIT V

                           CNAM SERVICE QUERY SERVICE

Upon receipt of the line/billing information from LSP, in a format acceptable to
SWBT, SWBT will provide the functionality needed to perform the following
query/response functions, on a call-by-call basis, for the line/billing records
residing in SWBT's LIDB to identify the name associated with the line record.

Calling Name records are limited to fifteen characters. LSP is responsible for
providing all name truncations and/or abbreviations needed to limit a calling
name to 15 characters. LSP is also responsible for ensuring that its calling
name data does not contain obscenities in English or other languages. Upon
receipt of Calling Name data, in a format acceptable to SWBT, SWBT will provide
the query/response functions, on a call-by-call basis, for the line/billing
records residing in SWBT's LIDB to identify the name associated with the line
record.

CNAM Service Query is SWBT's service that allows customers to query SWBT's LIDB
for calling name information. Calling Name information means a
telecommunications company's records of all its subscribers' names associated
with one or more ten-digit telephone numbers assigned to the end user.

Approved and executed the _________________________ day of _________, 19___.


DIGITAL TELEPORT, INC. (MISSOURI)           SOUTHWESTERN BELL TELEPHONE COMPANY

By________________________________          By_____________________________

Title_____________________________          Title__________________________

Date______________________________          Date___________________________


<PAGE>   138
                                                                   APPENDIX LIDB
                                                                      EXHIBIT VI
                                                                     PAGE 1 OF 1

                                  APPENDIX LIDB

                                   EXHIBIT VI

                    SINGLE NUMBER SERVICE (SNS) QUERY SERVICE

Upon receipt of the line/billing information from LSP, in a format acceptable to
SWBT, SWBT shall provide the functionality needed to perform the query/response
functions, on a call-by-call basis, for the line/billing records residing in
SWBT's LIDB to identify the ZIP code associated with the line record.


Approved and executed the _________________________ day of _________, 19___.


DIGITAL TELEPORT, INC. (MISSOURI)           SOUTHWESTERN BELL TELEPHONE COMPANY

By________________________________          By______________________________

Title_____________________________          Title___________________________

Date______________________________          Date____________________________

<PAGE>   139
                                                                   APPENDIX LIDB
                                                                     EXHIBIT VII
                                                                     PAGE 1 OF 1

                                  APPENDIX LIDB

                                   EXHIBIT VII

                 ORIGINATING LINE NUMBER SCREENING (OLNS) QUERY

Upon receipt of the line/billing information for LSP, in a format acceptable to
SWBT, SWBT shall provide the functionality needed to perform the query/response
functions, on a call-by-call basis, for the line/billing records residing in
SWBT's LIDB to identify the originating line screening requirements of the line
record.

LSP shall ensure that its OLNS data complies with the definitions and record
formats set forth in GR-1149-CORE and GR-446-CORE.


Approved and executed the _________________________ day of _________, 19___.


DIGITAL TELEPORT, INC. (MISSOURI)           SOUTHWESTERN BELL TELEPHONE COMPANY

By________________________________          By______________________________

Title_____________________________          Title___________________________

Date______________________________          Date____________________________


<PAGE>   140


                                                                 APPENDIX LIDB-V
                                                                    PAGE 2 OF 14
                        APPENDIX LIDB VALIDATION SERVICE

     WHEREAS, the Parties are interested in purchasing each other's LIDB
Validation Service (or equivalent service);

     In consideration of the mutual promises contained herein, SWBT and LSP
agree as follows.

I. DEFINITIONS

      A.   A-links means a diverse pair of facilities connecting local
           end office switching centers with Signaling Transfer Points.

      B.   Alternate Billing Service (ABS) means a service that allows
           end users to bill calls to accounts that may not be associated with
           the originating line.  There are three types of ABS calls:  calling
           card, collect, and third number billed calls.

      C.   Billed Number Screening (BNS) means a validation of toll
           billing exception (TBE) data and performance of public telephone
           checks i.e., determining if a billed line is a public (including
           those classified as semi-public) telephone number.

      D.   Calling Card Service (CCS) means a service that enables a
           calling customer to bill a telephone call to a calling card number
           with or without the help of an operator.

      E.   Common Channel Signaling (CCS) Network means an out-of-band,
           packet-switched, signaling network used to transport supervision
           signals, control signals, and data messages.  Validation Queries
           and Response messages are transported across the CCS network.

      F.   Data Base means an integrated collection of related data.
           In the case of the LIDB, the data base is the line number and
           related line information.

      G.   Data Owner means telecommunications companies that
           administer their own validation data in a party's LIDB or LIDB-like
           database.

      H.   Line Information Data Base (LIDB) means an ANSI SS7
           call-related database system.  LIDB functions as a centralized
           repository for data storage and retrieval.  SWBT's LIDB supports 
           validation of ABS calls as well as certain other services.

      I.   Line Record means information in LIDB that is specific to a
           single telephone number or special billing number.
<PAGE>   141

                                             
                                                                 APPENDIX LIDB-V
                                                                    PAGE 3 OF 14


      J.   Nonrecurring charges are one-time charges that apply for a
           specific work activity (i.e., installation or change to an existing
           service).  Nonrecurring charges are applicable for the
           establishment of LIDB Validation Service, service rearrangements,
           and service order activity.

      K.   Originating Point Code (OPC) means a code assigned to
           identify LSP's operator service system location(s).

      L.   Personal Identification Number (PIN) means a confidential
           four-digit code number provided to a calling card customer to
           prevent unauthorized use of his/her calling card number.  The PIN
           is stored in LIDB for those line numbers that have an associated
           calling card.

      M.   Query means a message in American National Standards
           Institute's (ANSI) standard SS7 signaling protocol which represents
           a request to a LIDB or LIDB-like database for Validation
           information.

      N.   Query Rate applies to each Validation Query that is received
           at SWBT's LIDB for the validation of calling card and toll billing
           exception data and performance of public telephone checks; i.e.,
           determining if a billed line is a public (including those
           classified as semi public) telephone number.

      O.   Query Transport Rate applies to each Validation Query
           transported from SWBT's STP to the SCP where LIDB resides and back.
           SWBT and LSP shall list their STP locations in the National
           Exchange Carrier Association, Inc. Tariff FCC No. 4.

      P.   Response means an SS7 message which, when appropriately
           interpreted, represents an answer to a Query.

      Q.   Service Order Charge is a nonrecurring charge that applies,
           per service order form, that specifies the LSP's originating point
           codes (OPCs) of the LSP's designated operator service systems
           sending the Validation Query or Queries.

      R.   Service Control Point (SCP) is a CCS network node where
           Validation information resides.

      S.   Service Point (SP) means a CCS network interface element
           capable of initiating and/or terminating SS7 messages from an end
           office.

      T.   Service Rearrangements are changes to existing services
           which do not result in changes to previously established OPCs.

      U.   Service Switching Point (SSP) means the software capability
           within a switching point that provides the SP with SS7 message
           preparation/interpretation capability plus SS7
           transmission/reception access ability.

<PAGE>   142

                                                                 APPENDIX LIDB-V
                                                                    PAGE 4 OF 14

      V.   Signaling System 7 (SS7) means the signaling protocol used
           by the CCS network.

      W.   Signaling Transfer Point (STP) is the point where a Party
           interconnects with  a CCS/SS7 network.  In order to connect to
           SWBT's SS7 network, LSP or a third party initiating LSP's
           Validation Queries must connect with an SWBT STP in order to
           connect to SWBT's SCP.

      X.   Special Billing Number means line records in LIDB that are
           based on an NPA-RAO numbering format.  NPA-RAO numbering formats
           are similar to NPA-NXX formats except that the fourth digit of an
           NPA-RAO line record is either a zero (0) or a one (1).

      Y.   Toll Billing Exception (TBE) Service means a service that
           allows end users to restrict third number billing or collect calls
           to their lines.

      Z.   Validation information means Data Owners' records of all
           their Calling Card Service and Toll Billing Exception Service.

II. DESCRIPTION OF SERVICE

      A.   SWBT shall provide LSP access to Validation information
           whenever LSP initiates a query from an SSP for Validation
           information available in SWBT's LIDB.

      B.   All LSP Queries to SWBT's LIDB shall use a translations type of
           253 and a subsystem number in the calling party address field that
           is mutually agreed upon by the Parties.  LSP acknowledges that such
           subsystem number and translation type values are necessary for SWBT
           to properly process Validation Queries to its LIDB.

      C.   LSP warrants SWBT that LSP shall send Queries conforming to
           the ANSI approved standards for SS7 protocol and pursuant to the
           specification standards documents identified in Exhibit A attached
           hereto and incorporated by reference.  Both Parties acknowledge that
           transmission in said protocol is necessary for each party to
           provision Validation Service (or the equivalent thereof).  Both
           Parties warrant that they shall send SS7 Messages that comply
           with ANSI approved standards for SS7 protocol and pursuant to the
           specification standards documents identified in Exhibit A.  Each
           Party reserves the right to modify its network pursuant to other
           specifications standards, which may include Bellcore
           Specifications defining specific service applications, message
           types and formats, that may become necessary to meet the
           prevailing demands within the U.S. telecommunications industry.
           All such changes shall be announced a minimum of one hundred
           eighty (180) days in advance of implementation through industry
<PAGE>   143

                                                                 APPENDIX LIDB-V
                                                                    PAGE 5 OF 14



           standard procedures.  Each Party will work cooperatively to
           coordinate any necessary changes.

      D.   LSP acknowledges that CCS/SS7 network overload due to
           extraordinary volumes of Queries and/or other SS7 network messages
           can and will have a detrimental effect on the performance of SWBT's
           CCS/SS7 network.  LSP further agrees that SWBT, in its sole
           discretion, shall employ certain automatic and/or manual overload
           controls within SWBT's CCS/SS7 network to guard against these
           detrimental effects.  SWBT shall report to LSP any instances where
           overload controls are invoked due to LSP's CCS/SS7 network and LSP
           agrees in such cases to take immediate corrective actions as are
           necessary to cure the conditions causing the overload situation.

      E.   Prior to SWBT initiating service under this Appendix, LSP
           shall provide an initial forecast of busy hour Query volumes.  If,
           prior to the establishment of a mutually agreeable service
           effective date, in writing, SWBT, at its sole discretion,
           determines that it lacks adequate processing capability to provide
           Validation Service to LSP, SWBT shall notify LSP of SWBT's intent
           not to provide the services under this Appendix and this Appendix
           will be void and have no further effect.

      F.   LSP shall update its busy hour forecast for each upcoming
           calendar year (January - December) by October 1 of the preceding
           year.  LSP shall provide such updates each year for the first three
           (3) years of this Appendix.

      G.   SWBT will perform testing of the LIDB Validation Service in
           conjunction with CCS/SS7 Interconnection Service as outlined in
           Bellcore Technical References TR-NWT-000954, TR-TSV-000905, and TP
           76638.

      H.   SWBT supports the performance standards as defined in
           Section 7 of TR- TSV-000905.  The overall end-to-end CCS/SS7
           network objective is less than ten minutes unavailability per year
           from any Signal Point (SP) to any other SP.  The performance 
           objective for any single SP, including a Service Control Point 
           (SCP), is less than three minutes unavailability per year.  The  
           combined link set from the SCP to the Signal Transfer Point (STP) 
           has a performance objective of less than two minutes unavailability 
           per year.

      I.   SWBT's LIDB Validation Service system downtime will be less
           than twelve hours per year.  The response time for a Query, from
           switch transmission to reception, should not exceed one second for
           ninety-nine (99) percent of all Queries.

      J.   SWBT shall administer its LIDB to provide acceptable service
           levels to all customers of SWBT's LIDB Validation Service.  During
           periods of LIDB system congestion, SWBT will utilize an automatic
           code gapping procedure to control

<PAGE>   144

                                                                 APPENDIX LIDB-V
                                                                    PAGE 6 OF 14


           such congestion.  The automatic code gapping procedure will tell 
           LSP's switch the gap (how long LSP's switch should wait before 
           sending another query) and the duration (how long the switch should 
           continue to perform gapping). For example, during an overload 
           condition, the automatic code gapping procedure will tell SWBT's 
           LIDB when to begin to drop one out of three queries received.  This 
           code gapping procedure will be applied uniformly to all users of 
           SWBT's LIDB Validation Service. SWBT maintains the right to invoke 
           manual intervention of the automatic code gapping procedure to 
           preserve the integrity of its network.

      K.   LSP agrees that network overload due to extraordinary
           volumes of Queries and/or other SS7 network messages can and will
           have a detrimental effect on the performance of SWBT's network and
           its LIDB Validation Service.  LSP further agrees to take immediate,
           corrective actions as are necessary to cure the conditions causing
           the overload situation.

      L.   All access by LSP to SWBT's LIDB shall occur through SWBT's
           regional STP as designated by SWBT.

      M.   SWBT's LIDB shall contain a record for every SWBT working
           line number and Special Billing Number served by SWBT.  Other
           telecommunications companies, including LSP, may also store their
           data in SWBT's LIDB.  SWBT shall request such telecommunications
           companies to also provide this data as well.

      N.   SWBT shall update the LIDB information; e.g., add, delete,
           and modify customer accounts as customers move, become delinquent
           on their account, or order new service, on a daily basis.  SWBT
           shall request other Data Owners to provide such updates in like
           time.

      O.   SWBT has procedures in place to deactivate billing
           validation data in the event that such data is being used
           fraudulently or in the event end users exceed SWBT-defined limits
           on toll charges.  SWBT shall update SWBT- issued calling cards that
           SWBT suspects of being fraudulently used or exceeding SWBT-defined
           toll limits seven (7) days a week, 24 hours a day.

      P.   SWBT's LIDB shall receive and respond to all Calling Card
           Service and Billed Number Screening queries, including SWBT's and
           LSP's queries, as defined in Bellcore publications TR-NWT-000246,
           FR-NWT-000271, TR-TSV-000905, TR-NWT-000954 and SWBT's publication
           TP 6638.  These procedures shall be applied uniformly to all users
           of SWBT's LIDB Validation Service.

      Q.   SWBT's LIDB Validation Service shall provide the following
           functions on a per query basis:

<PAGE>   145

                                                                 APPENDIX LIDB-V
                                                                    PAGE 7 OF 14




             -    validation of a telecommunications calling
                  card account number stored in LIDB;

             -    determination of whether the billed line has
                  decided in advance to reject certain calls billed as collect
                  or to a third number; and

             -    determination of billed line as a public
                  (including those classified as semi public) or nonworking
                  telephone number.

      R.   SWBT provides LIDB Validation Service as set forth in this
           Appendix only as such service is used for LSP's activities as a
           local service provider in SWBT's traditional serving areas in the
           states of Arkansas, Kansas, Missouri, Oklahoma, and Texas.  SWBT
           provides a LIDB Validation Service for interexchange carriers,
           operator service providers, and other telecommunications companies
           under effective tariffs.  LSP agrees that any other use of SWBT's
           LIDB for the provision of LIDB Validation Service by LSP,
           including, but not limited to, when LSP acts as an LSP outside of
           SWBT's traditional serving areas in the states of Arkansas, Kansas,
           Missouri, Oklahoma, and Texas, and/or acts as an operator service
           provider to other LSPs, local exchange companies, or any other
           telecommunications company, and/or acts as an interexchange
           carrier, will be pursuant to the terms, conditions, rates, and
           charges of SWBT's effective tariffs, as revised, for LIDB
           Validation Service.

III. PRICE AND PAYMENT

      A.   LSP shall pay SWBT a Validation Query rate and a Query
           Transport Rate for each Query initiated into SWBT's LIDB.  These
           rates are set forth in Exhibit I (Basis of Compensation), which is 
           attached hereto and incorporated by reference.

      B.   LSP shall pay a Nonrecurring Charge for each request for
           establishment or change of existing LIDB Validation Service.  The
           LIDB Validation Service Establishment Charge applies per
           originating point code per request and is set forth in Exhibit I
           (Basis of Compensation).

      C.   LSP shall pay a Service Order Charge for each request for
           service order activity.  The Service Order Charge is set forth in
           Exhibit I (Basis of Compensation).

      D.   Payment to SWBT for LIDB Validation Service shall be based
           upon the rates set forth in Exhibit I (Basis of Compensation),
           attached hereto and made a part thereof.  These rates and charges
           will apply for one (1) year from the service effective date for
           each exchange.  After one (1) year, SWBT may change the rates upon
           sixty (60) days' notice.  SWBT may first give such notice sixty
           (60) days before the end of the first year.
<PAGE>   146



      E.   SWBT shall record usage information for LSP's Validation
           Queries terminating to SWBT's LIDB.  SWBT shall use its SCPs as the
           source of usage data.  SWBT shall aggregate usage by the point code
           of the Query-originating SSP.

      F.   Based upon the data identified in SubSection 3.E of this
           Appendix, SWBT shall bill LSP for its Validation Queries on a
           monthly basis.  The bill will be issued by the fifteenth day of
           each month, and LSP shall pay the bill within thirty (30) days of
           the bill issue date.  LSP shall pay late payment charges as
           applicable and as described in SWBT's Tariff FCC No. 73.

      G.   SWBT shall provide sufficient information with the bill to
           enable LSP to determine how the billed amount was calculated.

      H.   Depending on LSP's choice of method for transporting its
           Queries and Responses, LSP may be required to purchase certain
           other services, especially services that may be provided pursuant
           to effective tariffs.  In this event the prices, terms, conditions,
           and billing for such services will be specified in the applicable
           tariff(s) and this Appendix shall not be construed to circumvent
           the prices, terms, conditions, or billing as specified in the
           applicable tariff(s).

      I.   If there is a dispute associated with a monthly bill, the
           disputing Party shall notify the other in writing within ninety
           (90) calendar days of the date of said monthly bill or the dispute
           shall be waived.  Each Party agrees that any amount of any monthly
           bill that that Party disputes will be paid by that Party according 
           to the terms of Subsection III.F. above. Any adjustments relating 
           to a disputed amount shall be reflected on the next monthly bill 
           issued after resolution.  Any credit issued upon resolution of any  
           dispute shall bear interest at the rate specified in Subsection 
           III.F. above, payable on and as of the date the credit is issued.  
           Parties shall work cooperatively and use their best efforts to 
           resolve any disputes as quickly as possible.

      J.   SWBT shall treat changes in previously established OPCs as a
           discontinuance of the existing LIDB Validation Service and
           establishment of a new LIDB Validation Service and all applicable
           Nonrecurring Charges shall be paid by LSP.

      K.   If LSP acts as a telecommunications company other than a
           local service provider, or if LSP acts as a local service provider
           in areas outside of SWBT's traditional service areas in the states
           of Arkansas, Kansas, Missouri, Oklahoma, and Texas, LSP shall
           designate those point codes from which it originates LIDB
           Validation Service Queries as an LSP acting as a local service
           provider within SWBT's traditional service areas in the states of
           Arkansas, Kansas, Missouri, Oklahoma, and Texas from those point
           codes which originate LIDB Validation Service Queries for all other
           aspects of its business.  If LSP uses the same OPC to originate
           Queries for its operations as an LSP within SWBT's traditional
           service areas in the states of Arkansas, Kansas, Missouri,
           Oklahoma, and Texas as it does
<PAGE>   147

                                                                 APPENDIX LIDB-V
                                                                    Page 9 of 14


           for any other aspect of its business, then LSP shall provide SWBT 
           with a percentage of use factor that SWBT can use to apportion LSP's
           traffic between SWBT's terms, conditions, rates and charges under 
           this Appendix and the terms, conditions, rates and charges under 
           SWBT's appropriate and effective tariff.  LSP shall provide this 
           factor in a whole number between one (1) and one hundred (100) to 
           indicate the percentage of LIDB Validation Services LSP originates 
           as an LSP acting as a local service provider within SWBT's 
           traditional service area in the states of Arkansas, Kansas, 
           Missouri, Oklahoma, and Texas.  A percentage of use factor of 1 
           (one) indicates that one percent of LSP's LIDB Validation Service 
           Queries originate as an LSP acting as a local service provider 
           within SWBT's traditional service areas in the states of Arkansas, 
           Kansas, Missouri, Oklahoma, and Texas.  A percentage of use factor 
           of one hundred (100) indicates that one hundred percent of LSP's 
           LIDB Validation Service Queries is from LSP acting as a local 
           service provider within SWBT's traditional service area in the 
           states of Arkansas, Kansas, Missouri, Oklahoma, and Texas.

      L.   Such percentage of use factors will be provided by LSP on
           the LIDB Access Service Order Form used to establish the service.
           All updates to this factor will provided via a letter.  If LSP does
           not furnish a percentage of usage factor, LSP agrees that SWBT will 
           apply a percentage of usage factor of one percent (1%).

      M.   LSP shall update its percentage of use factors on a
           quarterly basis.  Effective on the first of January, April, July
           and October of each year, LSP shall forward to SWBT, to be received
           no later than fifteen (15) business days after the first of each
           such month, a revised report showing the percentage of use factors
           for the past three months ending the last day of December, March,
           June, and September, respectively, for each OPC from which LSP
           originates LIDB Validation Service Queries.  Both Parties agree
           that the revised report will serve as the basis for the next three
           months billing.  Both Parties agree that no prorating or
           backbilling will be done based on the report.  SWBT shall use the
           revised report to apportion usage rates, monthly rates, and
           nonrecurring charges until a revised report is received from LSP as
           set forth and agreed to herein.

      N.   SWBT may, upon written request by Certified U.S. mail
           (return receipt requested), require LSP to provide call detail
           records which will be audited to substantiate the projected
           percentage of use factor provided by LSP.  SWBT may request this
           detailed information annually.  If the audit results represent what
           SWBT considers to be a substantial deviation from LSP's previously
           reported percentage of use for the period upon which the audit was
           based, and that deviation is not due to seasonal changes or other
           identifiable reasons, LSP agrees to allow SWBT to request such call
           detail records more than once annually.  Both parties agree that
           SWBT may make the call detail records available to an independent
           auditor or to SWBT audit employees within thirty (30) days of the
           request at an agreed upon location during normal business hours.
                                                                   
<PAGE>   148

                                                                 APPENDIX LIDB-V
                                                                   Page 10 of 14


 
      O.   If LSP fails to comply with SWBT's request for auditable
           call detail records, SWBT may refuse additional applications for
           service and/or refuse to complete any pending orders for service
           for a period of thirty (30) days.  If at the conclusion of thirty
           (30) days, LSP still does not comply with this request, SWBT may
           apply an assumed percentage of use factor of one percent (1%).

IV. OWNERSHIP OF VALIDATION INFORMATION

      A.   Telecommunications companies depositing information in
           SWBT's LIDB may retain full and complete ownership and control over
           such information.  LSP obtains no ownership interest by virtue of
           this Appendix.

      B.   Unless expressly authorized in writing by parties, LIDB
           Validation Service is not to be used for purposes other than those
           described in this Appendix.  LSP may use LIDB Validation Service
           for those functions only on a call-by-call basis.  Data accessed on 
           LIDB may not be stored by LSP elsewhere for future use.

      C.   Proprietary information residing in SWBT's LIDB is protected
           from unauthorized access and LSP may not store such information in
           any table or database for any reason.  All information related to
           alternate billing service is proprietary.  Examples of proprietary
           information are as follows:


           -    Billed (Line/Regional Accounting Office (RAO)) Number
           -    PIN Number(s)
           -    Billed Number Screening (BNS) indicators
           -    Class of Service (also referred to as Service or Equipment)
           -    Reports on LIDB usage
           -    Information related to billing for LIDB usage
           -    LIDB usage statistics.


      D.   LSP shall not copy, store, maintain, or create any table or
           database of any kind after initiating, and based upon a Response
           to, a Validation Query to SWBT's LIDB.

      E.   If LSP acts on behalf of other carriers, LSP shall prohibit
           its Query- originating carrier customers from copying, storing,
           maintaining, or creating any table or database of any kind from any
           Response provided by SWBT after a Validation Query to SWBT's LIDB.

      F.   SWBT will share end user information, pertinent to fraud
           investigation, with LSP when validation queries for the specific
           end user reaches SWBT's established fraud threshold level.  This
           fraud threshold level will be applied uniformly to all end user
           information in SWBT's LIDB.
<PAGE>   149

  
                                                                 APPENDIX LIDB-V
                                                                   Page 11 of 14


V. TERM AND TERMINATION

      A.   This Appendix shall become effective pursuant to Section
           XXVII (Effective Date) of the Statement and shall continue for one
           (1) year from the effective date of implementation of LIDB
           Validation Service.  Thereafter, this Appendix shall remain in
           effect unless terminated by either party upon written notice given
           sixty (60) days in advance of the termination date.

      B.   If a Party materially fails to perform its obligations under
           this Appendix, the other Party, after notifying the non-performing
           Party of the failure to perform and allowing that Party thirty (30)
           days after receipt of the notice to cure such failure, may cancel
           this Appendix immediately upon written notice.

      C.   Notwithstanding anything to the contrary in this Appendix,
           if legal or regulatory decisions or rules compel SWBT or LSP to
           terminate the Appendix, SWBT and LSP shall have no liability to the
           other in connection with such termination.

VI. LIMITATION OF LIABILITY

      A.   A Party's sole and exclusive remedies against the other
           Party for injury, loss or damage caused by or arising from anything
           said, omitted or done in connection with this Appendix regardless
           of the form of action, whither in contract or in tort (including
           negligence or strict liability) shall be the amount of actual
           direct damages and in no event shall exceed the amount paid for
           LIDB Validation Service.

      B.   The remedies in Section VI.A. of this Appendix shall be
           exclusive of all other remedies against a Party, its affiliates,
           subsidiaries or parent corporation, (including their directors,
           officers, employees or agents).

      C.   In no event shall a Party have any liability for system
           outage or inaccessibility, or for losses arising from the
           unauthorized use of the data by LIDB Validation Service Query
           purchasers.

      D.   SWBT is furnishing access to its LIDB or LIDB-like database
           in order to facilitate LSP's provision of Alternate Billing Service
           to its end users, but not to insure against the risk of completion
           of an ABS-related call.  While SWBT agrees to make every reasonable
           attempt to provide accurate Validation information, the Parties
           acknowledge that Validation information is the product of routine
           business service order activity and fraud investigations.  LSP
           acknowledges that SWBT can furnish Validation information only as
           accurate and current as the information has been provided to SWBT
           for inclusion in its LIDB.  Therefore, SWBT, in addition to the
           limitations of liability set forth, is not liable for inaccuracies
           in the Validation information records provided to LSP except such
           inaccuracies caused by SWBT's willful or wanton misconduct or gross
           negligence.

<PAGE>   150


                                                                 APPENDIX LIDB-V
                                                                   PAGE 12 OF 14



      E.   IN NO EVENT SHALL SWBT, ITS AFFILIATES, SUBSIDIARIES OR
           PARENT CORPORATION, (INCLUDING ITS DIRECTORS, OFFICERS, EMPLOYEES
           OR AGENTS) HAVE ANY LIABILITY WHATSOEVER TO OR THROUGH LSP FOR ANY
           INDIRECT, SPECIAL, OR CONSEQUENTIAL DAMAGES, INCLUDING, BUT NOT
           LIMITED TO LOSS OF ANTICIPATED PROFITS OR REVENUE OR OTHER ECONOMIC
           LOSS IN CONNECTION WITH OR ARISING FROM ANYTHING SAID, OMITTED OR
           DONE HEREUNDER, EVEN IF LSP HAS BEEN ADVISED OF THE POSSIBILITY OF 
           SUCH DAMAGES.

VII. COMMUNICATION AND NOTICES

      A.   Ordering and billing inquiries for the services described
           herein from SWBT shall be directed to the Local Service Provider
           Service Center (LSPSC).  Ordering shall be done through the LSPSC
           using the form attached hereto as Exhibit III.

VIII. CONFIDENTIALITY

      A.   Identification SWBT and LSP recognize and acknowledge that,
           in connection with the services to be provided hereunder, either
           may disclose to the other party proprietary or confidential
           customer, technical or business information in written graphic,
           oral or other tangible or intangible forms.  In order for such
           information to be considered "Proprietary Information" under this
           Appendix, such information must be marked "Confidential" or
           "Proprietary" or bear a marking of similar import.  Orally
           disclosed information shall be considered Proprietary Information
           only if contemporaneously identified as such and reduced to writing
           and delivered to the other party with a statement or marking of
           confidentiality within twenty (20) calendar days after oral
           disclosure.

      B.   Nondisclosure.  Subject to Sections 8C through 8F, the Party
           (the "Receiving Party") that receives Proprietary Information from
           the other Party (the "Disclosing Party") agrees:

             (1)  That all Proprietary Information shall be and
                  shall remain the exclusive property of the Disclosing Party.

             (2)  To limit access to such Proprietary
                  Information to authorized employees and other individuals
                  who have a need to know the Proprietary Information in order
                  to perform its obligations under this Appendix.

             (3)  To keep such Proprietary Information
                  confidential and to use the same level of care to prevent
                  disclosure or unauthorized use of the received Proprietary
                  Information as it exercises in protecting its own
                  Proprietary Information of a similar nature.


<PAGE>   151

                                                                 APPENDIX LIDB-V
                                                                   PAGE 13 OF 14



             (4)  For a period of three (3) years following any
                  disclosure, not to copy or publish or disclose such
                  Proprietary Information to others or authorize anyone else
                  to copy or publish or disclose such Proprietary Information 
                  to others without the prior written approval of the 
                  Disclosing Party.

             (5)  To use such Proprietary Information only for
                  purposes of performing its obligations under this Appendix
                  and for other purposes only upon such terms as may be agreed
                  upon between the Parties in writing.

      C.   Required Disclosures.  The Receiving Party agrees to give
           notice to the Disclosing Party of any demand to disclose or provide
           Proprietary Information of the Disclosing Party to another person,
           under lawful process, prior to disclosing or furnishing such
           Proprietary Information.  Further, the Receiving Party agrees to
           reasonably cooperate if the Disclosing Party deems it necessary to
           seek protective arrangements.  The Receiving Party may disclose or
           provide Proprietary Information of the Disclosing Party to meet the
           requirements of a court, regulatory body or government agency
           having jurisdiction over the Party; provided, however, that the
           Receiving Party shall notify the Disclosing Party so as to give the
           Disclosing Party a reasonable opportunity to object to such
           disclosure.  The Disclosing Party may not unreasonably withhold
           approval of protective arrangements provided by any such court,
           regulatory body or government agency.  Nothing herein requires
           either Party to support the position of any person or entity as to
           whether any particular Proprietary Information is proprietary under
           applicable law or this Section 8.

      D.   Exceptions.  Notwithstanding anything to the contrary
           contained in this Appendix, the Proprietary Information described
           herein shall not be deemed confidential or proprietary and the
           Receiving Party shall have no obligation to prevent disclosure of
           such Proprietary Information if such Proprietary Information:

             (1)  is already known to the Receiving Party;

             (2)  is or becomes publicly known, through publication, 
                  inspection of the product, or otherwise, and
                  through no wrongful act of the Receiving Party;

             (3)  is received from a third party without similar restriction 
                  and without breach of this Section 8;

             (4)  is independently developed, produced or generated by the 
                  Receiving Party;

             (5)  is furnished to a third party by the Disclosing Party without
                  a similar restriction on the third party's rights; or

<PAGE>   152

                                                                 APPENDIX LIDB-V
                                                                   PAGE 14 OF 14




             (6)  is approved for release by written authorization of the 
                  Disclosing Party, but only to the extent of such 
                  authorization.

      E.   Permitted Uses.  SWBT shall be permitted to use Proprietary
           Information obtained through recording the volume of LSP Queries
           for the purposes of:  (a) estimation of facilities usage for
           jurisdictional separations; (b) engineering and network planning of
           facilities; and (c) measurement for billing purposes.

      F.   Legal Requirements.  Notwithstanding anything to the
           contrary contained in this Agreement, a Party's ability to disclose
           Proprietary Information or use disclosed Proprietary Information is
           subject all applicable statures, decisions, and regulatory rules
           concerning the disclosure and use of such Proprietary Information
           which, by their express terms, mandate a different handling of such
           information.

     9. Mutuality

        To the extent that LSP stores its own Validation Information in a
        database, LSP agrees that Validation Information shall be available to
        SWBT on terms and conditions comparable to those contained in this
        Appendix.  Such terms and conditions shall include, but not be limited
        to, making such Validation Information available on a platform
        technically similar to that employed by SWBT, and at a rate comparable
        to that charged by SWBT.

    10. Attached and incorporated herein are:


        Exhibit I    -    Basis of Compensation
        Exhibit II   -    Specifications and Standards
        Exhibit III  -    LIDB Access Service Order Form


<PAGE>   153

                                                     APPENDIX LIDB-V - EXHIBIT I

                                                                     PAGE 1 OF 1

                                APPENDIX LIDB-V

                             BASIS OF COMPENSATION


1. COMPENSATION:

      All rates and charges contained in this section are applicable in all
      regulatory jurisdictions.


2. Rates and Charges


   A    LIDB Query                                        Rate Per Query
                                                        ---------------------

        1.            Per LIDB Query Transport            $.0045

        2.            Per LIDB Validation Query           $.026

                      - Billed Number Screening
                      - Calling Card Count

   B.   LIDB Nonrecurring Charge                          Nonrecurring Charge
                                                        ---------------------

        1.            Per Originating Point Code (OPC)    $15.10

        2.            Per LIDB Validation Service Form   $256.70


<PAGE>   154


                                                      APPENDIX LIDB-V EXHIBIT II
                                                                     PAGE 1 OF 1


                                APPENDIX LIDB-V

                          SPECIFICATIONS AND STANDARDS



                     Issuing Organization               Document Number
                     --------------------               ---------------

                     Bellcore                           TR-NWT-000246


                     Bellcore                           TR-NWT-000271


                     Bellcore                           TR-TSV-000905


                     Bellcore                           TR-NWT-000954


                     SWBT                               TP 76638


<PAGE>   155


                                                                    EXHIBIT III
                                                                  SEPTEMBER 1996
                                                                        PAGE 1

SOUTHWESTERN BELL TELEPHONE COMPANY
CUSTOMER PROVIDED FACTOR REPORTS



                   LIDB ACCESS VALIDATION SERVICES ORDER FORM

CUSTOMER NAME__________________________________________________________________

CARRIER CUSTOMER NAME ABBREVIATION _____________________________
(CCNA - THREE ALPHA CHARACTERS)

CUSTOMER ADDRESS
_______________________________________________________________________________

CUSTOMER BILLING NAME__________________________________________________________
(IF DIFFERENT THAN CUSTOMER NAME)

ACCESS CUSTOMER NAME ABBREVIATION ______________________________
(ACNA - THREE ALPHA CHARACTERS)

CUSTOMER BILLING ADDRESS
___________________________________________________________________
(IF DIFFERENT THAN CUSTOMER ADDRESS)

CITY, STATE, ZIP CODE
__________________________________________________________________________

CUSTOMER BILLING CONTACT NAME AND TELEPHONE NUMBER_____________________________

______________________________________________________________(____)____________

CREDIT INFORMATION:  TYPE OF OWNERSHIP ________
     (S - SOLE OWNER; C - INCORP.; P - PARTNERSHIP)
IF INCORPORATED:
STATE WHERE INCORP. ___________ DATE INCORP. ______________

CHARTER NUMBER ____________________________________________

PRES. NAME __________________________________OFC. TEL. NO._(___)_______________

V.P. NAME ___________________________________OFC. TEL. NO._(___)_______________

SECT. NAME __________________________________OFC. TEL. NO._(___)_______________

TREA. NAME __________________________________OFC. TEL. NO._(___)_______________

IF PARTNERSHIP:
PARTNERS NAME _______________________________OFC. TEL. NO._(___)_______________

PARTNERS NAME________________________________OFC. TEL. NO._(___)_______________

PARTNERS NAME________________________________OFC. TEL. NO._(___)_______________

<PAGE>   156

                                                                    EXHIBIT III
                                                                  SEPTEMBER 1996
                                                                        PAGE 2
SOUTHWESTERN BELL TELEPHONE COMPANY
CUSTOMER PROVIDED FACTOR REPORTS



PARTNERS NAME________________________________OFC. TEL. NO._(___)_______________
LETTER OF AGENCY DATED ______________SIGNATURE_________________________________

SWBT ORDER NUMBER ___________________

DESIRED DUE DATE ______________________FIRM DUE DATE___________________________

FOR NEW SERVICE, THE APPROXIMATE NUMBER OF NPA NXXs____________________________

TYPE OF ACTIVITY ______ (N - NEW OR ADD; C - CHANGE; D - DISCONNECT; S - SUPP)

BILLING ACCOUNT NUMBER (BAN)___________________________________________________

CUSTOMER ORDER CONTACT NAME, ADDRESS, ZIP CODE, AND TELEPHONE 
NUMBER:

__________________________________________
__________________________________________
____________________________(____)_________

CUSTOMER TECHNICAL CONTACT NAME AND TELEPHONE NUMBER:
_________________________________________________________(____)________________

CPOC SVC. REP. CONTACT NAME AND TELEPHONE NUMBER:
_________________________________________________________(____)________________


*SWBT CKR:_________________________________________*TWO SIX
CODE:____________________________
     (SWBT ID OF CCS/SS7 INTERCONN. SVC.)

1. _______________________________
2. _______________________________
3. _______________________________
4. _______________________________

*THIS INFORMATION SHOULD BE OBTAINED BY THE LIDB CUSTOMER FROM THEIR CCS/SS7
INTERCONNECTION SERVICE PROVIDER.


<PAGE>   157

                                                                    EXHIBIT III
                                                                  SEPTEMBER 1996
                                                                        PAGE 3
SOUTHWESTERN BELL TELEPHONE COMPANY
CUSTOMER PROVIDED FACTOR REPORTS




LIDB VALIDATION SERVICE ____ CALLING NAME SERVICE ____

ORIGINATING LINE NUMBER SCREENING _____


<TABLE>
<S>                  <C>                  <C>                  <C>
ACT.                 ORIGINATING POINT    ACT.                 ORIGINATING POINT
TYPE                 CODES:               TYPE                 CODES:

____                 ___________________  ____                 ___________________
____                 ___________________  ____                 ___________________
____                 ___________________  ____                 ___________________
____                 ___________________  ____                 ___________________
____                 ___________________  ____                 ___________________
____                 ___________________  ____                 ___________________
____                 ___________________  ____                 ___________________
____                 ___________________  ____                 ___________________
____                 ___________________  ____                 ___________________
____                 ___________________  ____                 ___________________
____                 ___________________  ____                 ___________________
____                 ___________________  ____                 ___________________
____                 ___________________  ____                 ___________________
____                 ___________________  ____                 ___________________
____                 ___________________  ____                 ___________________
____                 ___________________  ____                 ___________________
____                 ___________________  ____                 ___________________
____                 ___________________  ____                 ___________________
____                 ___________________  ____                 ___________________
____                 ___________________  ____                 ___________________
____                 ___________________  ____                 ___________________
____                 ___________________  ____                 ___________________
____                 ___________________  ____                 ___________________
____                 ___________________  ____                 ___________________
____                 ___________________  ____                 ___________________
____                 ___________________  ____                 ___________________
____                 ___________________  ____                 ___________________
____                 ___________________  ____                 ___________________
____                 ___________________  ____                 ___________________
____                 ___________________  ____                 ___________________
____                 ___________________  ____                 ___________________
____                 ___________________  ____                 ___________________
____                 ___________________  ____                 ___________________
____                 ___________________  ____                 ___________________
____                 ___________________  ____                 ___________________
</TABLE>


REMARKS_________________________________________________________________________
________________________________________________________________________________
________________________________________________________________________________

DATE AND TIME RECEIVED IN THE CPOC

<PAGE>   158

                                                                    EXHIBIT III
                                                                  SEPTEMBER 1996
                                                                        PAGE 4

SOUTHWESTERN BELL TELEPHONE COMPANY
CUSTOMER PROVIDED FACTOR REPORTS





LIDB VALIDATION SERVICE ____ CALLING NAME SERVICE ____

ORIGINATING LINE NUMBER SCREENING _____


<TABLE>
<S>                  <C>                  <C>                  <C>
ACT.      ORIGINATING POINT               ACT.                 ORIGINATING POINT
TYPE      CODES:                          TYPE                 CODES:

____                 ___________________  ____                 ___________________
____                 ___________________  ____                 ___________________
____                 ___________________  ____                 ___________________
____                 ___________________  ____                 ___________________
____                 ___________________  ____                 ___________________
____                 ___________________  ____                 ___________________
____                 ___________________  ____                 ___________________
____                 ___________________  ____                 ___________________
____                 ___________________  ____                 ___________________
____                 ___________________  ____                 ___________________
____                 ___________________  ____                 ___________________
____                 ___________________  ____                 ___________________
____                 ___________________  ____                 ___________________
____                 ___________________  ____                 ___________________
____                 ___________________  ____                 ___________________
____                 ___________________  ____                 ___________________
____                 ___________________  ____                 ___________________
____                 ___________________  ____                 ___________________
____                 ___________________  ____                 ___________________
____                 ___________________  ____                 ___________________
____                 ___________________  ____                 ___________________
____                 ___________________  ____                 ___________________
____                 ___________________  ____                 ___________________
____                 ___________________  ____                 ___________________
____                 ___________________  ____                 ___________________
____                 ___________________  ____                 ___________________
____                 ___________________  ____                 ___________________
____                 ___________________  ____                 ___________________
____                 ___________________  ____                 ___________________
____                 ___________________  ____                 ___________________
____                 ___________________  ____                 ___________________
____                 ___________________  ____                 ___________________
____                 ___________________  ____                 ___________________
____                 ___________________  ____                 ___________________
____                 ___________________  ____                 ___________________
</TABLE>


REMARKS
________________________________________________________________________________
________________________________________________________________________________
________________________________________________________________________________

DATE AND TIME RECEIVED IN THE CPOC


<PAGE>   159

                                                                    EXHIBIT III
                                                                  SEPTEMBER 1996
                                                                        PAGE 5

SOUTHWESTERN BELL TELEPHONE COMPANY
CUSTOMER PROVIDED FACTOR REPORTS


                   LIDB ACCESS VALIDATION SERVICE ORDER FORM

                                  INSTRUCTIONS

THE LIDB ACCESS VALIDATION SERVICE ORDER FORM CONSISTS OF FOUR PAGES.

PAGE 1 - ALL THE INFORMATION ON THIS PAGE IS FOR ADMINISTRATIVE USE IN
     ESTABLISHING THE LIDB BILLING ACCOUNT.  ALL OF THE INFORMATION IS
     REQUIRED ON THE INITIAL ORDER.  ORDERS SUBMITTED SUBSEQUENT TO THE
     ESTABLISHED ACCOUNT WILL REQUIRE ONLY THE CUSTOMER'S NAME AND ADDRESS.
     THE OTHER ENTRIES WILL BE REQUIRED ONLY IF THERE IS A CHANGE TO THE
     ORIGINAL INFORMATION.

PAGE 2 - ALL THE INFORMATION ON PAGE TWO IS FOR THE REQUESTED ACTIVITY.  THIS
     INFORMATION WILL ALWAYS BE REQUIRED.

1.   DESIRED DUE DATE/FIRM DUE DATE - APPROXIMATE NUMBER OF NPA NXXs

    ***DESIRED DUE DATE IS USED WHEN A FIRM DUE DATE HAS NOT BEEN COORDINATED
    WITH THE LIDB CUSTOMER PRIOR TO THE SUBMISSION OF THE ORDER FORM TO THE
    ICSC.

    THE LIDB CUSTOMER WILL ENTER THEIR DESIRED DATE FOR THEIR LIDB SERVICE TO
    BE ESTABLISHED AND THE APPROXIMATE NUMBER OF NPA NXXs ASSOCIATED WITH THE
    NEW SERVICE.

    IF THE ORDER IS FOR SUBSEQUENT ACTIVITY TO AN ESTABLISHED ACCOUNT, THE
    APPROXIMATE NUMBER OF NPA NXXs WILL NOT BE REQUIRED.

    ***FIRM DUE DATE IS USED WHEN THE CUSTOMER'S ACCOUNT MANAGER HAS
    COORDINATED WITH THE SNAC TO ESTABLISH THE DUE DATE PRIOR TO THE ORDER
    FORM BEING SENT TO THE CPOC.

<PAGE>   160

                                                                    EXHIBIT III
                                                                  SEPTEMBER 1996
                                                                        PAGE 6


SOUTHWESTERN BELL TELEPHONE COMPANY
CUSTOMER PROVIDED FACTOR REPORTS


PAGE 2 INSTRUCTIONS CONTINUED -

2.   TYPE OF ACTIVITY

    N    - SHOULD BE ENTERED TO ESTABLISH A LIDB SERVICE CAN ALSO BE
           ENTERED TO ADD ADDITIONAL POINT CODES TO AN EXISTING SERVICE

    C   -  SHOULD BE ENTERED TO ADD POINT CODES TO OR DELETE POINT CODES FROM 
           AN EXISTING SERVICE

    D   -  SHOULD BE ENTERED TO COMPLETELY DISCONNECT AN EXISTING SERVICE

    S   - SHOULD BE ENTERED TO MAKE A CHANGE ON A CURRENT ORDER PRIOR TO THE  
          COMPLETION DATE  (i.e., CHANGE DUE DATE, CORRECT POINT CODE(S), ETC.)

3.   BILLING ACCOUNT NUMBER (BAN)

     THE SWBT BILLING ACCOUNT NUMBER OF THE VALIDATION SERVICE AND/OR THE
     CALLING NAME SERVICE

     IF THE ORDER IS FOR NEW SERVICE, THIS FIELD WILL BE BLANK

4.   CUSTOMER ORDER CONTACT...

     A CONTACT WITH THE CUSTOMER THAT THE CPOC CAN COORDINATE WITH FOR THE
     DESIRED DUE DATE OR CORRECTIONS TO AN ORDER.

5.   CUSTOMER TECHNICAL CONTACT...

     A TECHNICAL CONTACT WITH THE CUSTOMER THAT THE SWBT SNAC CAN COORDINATE
     WITH FOR THE PROVISIONING OF THE SERVICE.

6.   CPOC SERVICE REP....

     THE SWBT CPOC SERVICE REPRESENTATIVE THAT NEGOTIATES THE ORDER WILL ENTER
     THEIR NAME AND CONTACT INFORMATION.

7.   SWBT CKR AND TWO SIX CODE

     THIS INFORMATION WILL BE OBTAINED BY THE LIDB CUSTOMER FROM THEIR ORDER TO
     ESTABLISH THEIR CCS/SS7 INTERCONNECTION SERVICE OR FROM THEIR CCS/SS7
     INTERCONNECTION SERVICE PROVIDER.  THERE WILL ALWAYS BE FOUR LINKS FOR
     ACCESS TO THE LIDB.

<PAGE>   161

                                                                    EXHIBIT III
                                                                  SEPTEMBER 1996
                                                                        PAGE 7

SOUTHWESTERN BELL TELEPHONE COMPANY
CUSTOMER PROVDED FACTOR REPORTS


                                                                        


INSTRUCTIONS FOR PAGES 3 & 4 -

LIDB HAS THREE QUERY SERVICES:  VALIDATION, CALLING NAME (CNAM), AND
ORIGINATING LINE NUMBER SCREENING (OLNS)

THERE IS NOT A SPECIFIC NUMBER OF POINT CODES REQUIRED FOR ANY LIDB SERVICE.
THE LIDB CUSTOMER CAN SUBMIT AS MANY COPIES OF PAGES 3 & 4 AS REQUIRED FOR
THEIR POINT CODES PER REQUEST.

THE VALIDATION, CNAM, AND OLNS WILL BE ESTABLISHED ON A SINGLE BILLING
ACCOUNT.  IF THE LIDB CUSTOMER WOULD LIKE SEPARATE BILLING ACCOUNTS, THEN
SEPARATE BANs MUST BE REQUESTED (i.e. "ESTABLISH SEPARATE BILLING ACCOUNTS")
IN THE BILLING ACCOUNT NUMBER FIELD ON PAGE 2.  IF AN EXISTING LIDB CUSTOMER
WANTS TO ESTABLISH THEIR LIDB CNAM ON A SEPARATE BILLING ACCOUNT, THEN THE
LIDB CUSTOMER SHOULD ENTER "NEW BAN (OR SEPARATE BAN) FOR THE LIDB CNAM
SERVICE" IN THE BILLING ACCOUNT NUMBER FIELD ON PAGE 2.  THE SAME WILL APPLY
FOR A SEPARATE BAN FOR OLNS.  IN ORDER TO SET UP SEPARATE BILLING ACCOUNTS,
THE POINT CODES FOR THE LIDB VALIDATION, CNAM, AND OLNS SERVICES CANNOT BE THE
SAME.  THE CUSTOMER WILL USE BOTH PAGES 3 & 4 TO SUBMIT THEIR POINT CODES
SEPARATELY FOR SEPARATE BILLING ACCOUNTS.

1. LIDB VALIDATION SERVICE _____ CALLING NAME SERVICE _____
   ORIGINATING LINE NUMBER SCREENING _____


    ENTER A CHECK MARK OR AN "X" TO INDICATE WHICH OF THE LIDB SERVICES THE
    ORDER FORM IS REQUESTING TO ESTABLISH OR DELETE.  IF ALL LIDB SERVICES ARE
    REQUESTED ON THE SAME ORDER, THE POINT CODES FOR EACH SERVICE MUST BE
    LISTED ON SEPARATE PAGES.  THIS WILL ENABLE SWBT TO APPLY THE CORRECT
    NONRECURRING CHARGES.

2.   ACTIVITY TYPES

    IF A LIDB CUSTOMER NEEDS TO CHANGE AN EXISTING OPC ON AN ESTABLISHED
    ACCOUNT, THE "D" SHOULD BE USED TO INDICATE THE OPC CHANGING FROM AND THE
    "N" SHOULD BE USED TO INDICATE THE OPC CHANGING TO.


<PAGE>   162

                                                                    EXHIBIT III
                                                                  SEPTEMBER 1996
                                                                        PAGE 8
SOUTHWESTERN BELL TELEPHONE COMPANY
CUSTOMER PROVIDED FACTOR REPORTS




PAGES 3 & 4 INSTRUCTIONS CONTINUED 



LIST OF ORIGINATING POINT CODES AND ACTIVITY TYPE

ACTIVITY TYPES:  N - ESTABLISHING OR ADDING NEW POINT CODE(S)
                 D - DELETE EXISTING POINT CODE(S)


PLEASE NOTE IN THE FOLLOWING EXAMPLES, THE ORDER FORM ACTIVITY IS THE ENTRY
FROM PAGE 2, NUMBER 3. THIS IS NOT THE ACTIVITY TYPE.


EXAMPLE 1 - ORDER FORM ACTIVITY IS "N" TO ESTABLISH A NEW ACCOUNT AND SERVICE

<TABLE>

ACT.                   ORIGINATING POINT      ACT.                   ORIGINATING POINT
TYPE                   CODES:                 TYPE                   CODES:
<S>                    <C>                    <C>                    <C>                    

N                      XXX-XXX-XXX            N                      XXX-XXX-XXX
- ---------------------  ---------------------  ---------------------  ---------------------

EXAMPLE 2 - ORDER FORM ACTIVITY IS "C" TO CHANGE AN EXISTING POINT CODE OR TO ADD A         
            NEW POINT CODE AND DELETE AN EXISTING POINT CODE

ACT.                   ORIGINATING POINT      ACT.                   ORIGINATING POINT
TYPE                   CODES:                 TYPE                   CODES:

N                      XXX-XXX-XXX            D                      XXX-XXX-XXX
- ---------------------  ---------------------  ---------------------  ---------------------

EXAMPLE 3 - ORDER FORM ACTIVITY IS "D" TO DISCONNECT THE ACCOUNT AND THE
            SERVICE

ACT.                   ORIGINATING POINT      ACT.                   ORIGINATING POINT
TYPE                   CODES:                 TYPE                   CODES:

D                      XXX-XXX-XXX            D                      XXX-XXX-XXX
- ---------------------  -------------------    -------------------    -----------------
</TABLE>



THE REMARKS SECTION MAY BE UTILIZED BY SWBT OR THE LIDB CUSTOMER.

THE DATE AND TIME RECEIVED WILL BE ENTERED BY THE SWBT CPOC UPON RECEIPT OF
THE FORM.

AFTER THE FORM HAS BEEN COMPLETED, IT SHOULD BE MAILED OR FAXED TO THE SWBT
ICSC IN ST. LOUIS, MISSOURI.

<PAGE>   163
                                                                    APPENDIX OSS
                                                                     PAGE 2 OF 9


                                  APPENDIX OSS

                 ACCESS TO OPERATIONS SUPPORT SYSTEMS FUNCTIONS

                                  APPENDIX OSS

                 ACCESS TO OPERATIONS SUPPORT SYSTEMS FUNCTIONS

1.   GENERAL CONDITIONS

     1.1 This Appendix sets forth the terms and conditions under
which SWBT provides nondiscriminatory access to SWBT's operations
support systems (OSS) "functions" to LSP for pre-ordering, ordering,
provisioning, maintenance / repair, and billing.  Such functions will
be made available as described herein for Resold Services, as
provided in Appendix Resale, and for Unbundled Network Elements
(UNE), as provided in Appendix UNE.

     1.2 The functions, for Resale and UNE, will be accessible via
electronic interface, as described herein, where such functions are
available. Manual access will be available to all pre-ordering,
ordering, provisioning, and billing functions via the Local Service
Provider Service Center (LSPSC). Repair and maintenance functions are
available via manual handling by the Local Service Provider Center
(LSPC).

     1.3 LSP agrees to utilize SWBT electronic interfaces, as SWBT
defines in its requirements, only for the functions described herein
for the purposes of establishing and maintaining Resale services or
UNE.  LSP agrees that such use will comply with the summary of
SWBT's Operating Practice No. 113, Protection of Electronic
Information, titled Local Service Provider Security Policies and
Guidelines.

     1.4 LSP acknowledges and agrees that access to OSS functions
will only be utilized to view an end-user's Customer Proprietary
Network Information under the conditions set forth and agreed to in
Exhibit A of this Appendix.

     1.5 By utilizing electronic interfaces to access OSS functions,
LSP acknowledges and agrees to perform accurate and correct billing
functions that occur during ordering per the terms of this Agreement.
Further, LSP recognizes that such billing functions for conversion
orders require viewing CPNI as described in 1.4 above.  All exception
handling must be requested manually from LSPSC.

     1.6 In areas where Resale and UNE service order transactions
cannot be provided via an electronic interface for the pre-order,
ordering and provisioning processes, SWBT and LSP will utilize manual
processes until such time as the transactions can be electronically
transmitted.

     1.7 SWBT will provide a help desk function for electronic system
interfaces.

     1.8 SWBT and LSP will jointly establish interface contingency
and disaster recovery plans for the pre-order, ordering and
provisioning of Resale services and UNE.

     1.9 SWBT reserves the right to modify or discontinue the use of
any system or interface as it deems appropriate.

<PAGE>   164

                                                                    APPENDIX OSS
                                                                     PAGE 3 OF 9

     1.10 If LSP elects to utilize industry standardized electronic
interfaces for Resale or UNE, SWBT and LSP agree to work together in
the Order and Billing Forum (OBF) and the Telecommunications Industry
Forum (TCIF) to establish and conform to uniform industry standards
for electronic interfaces for pre-order, ordering, and provisioning.
Neither Party waives its rights as participants in such forums in the
implementation of the standards.  To achieve industry standard system
functionality as quickly as possible, the Parties acknowledge that
SWBT may deploy these interfaces with requirements developed in
advance of industry standards.  Thus, subsequent modifications may be
necessary to comply with emerging standards.  LSP and SWBT are
individually responsible for evaluating the risk of developing their
respective systems in advance of standards and agree to support their
own system modifications to comply with new requirements.

2.   PRE-ORDER

     2.1   SWBT will provide access to pre-order functions to support
LSP ordering of Resale services and UNE via several electronic
interfaces. The Parties acknowledge that ordering requirements
necessitate the use of current, real time pre-order information to
accurately build service orders. The following lists represent
pre-order information that will be available to LSP so that LSP order
requests may be created to comply with SWBT ordering requirements.

     2.2   PRE-ORDERING FUNCTIONS FOR RESALE SERVICES WILL INCLUDE:

           2.2.1 customer name, billing address and residence or business
address, billed telephone numbers and features and services available in the
end office where the customer is provisioned;

           2.2.2 features and services to which the customer subscribes (LSP
agrees that LSP's representatives will not access the information specified in
this Subsection until after the customer requests that the customer's local
exchange service provider be changed to LSP and such request complies with
conditions of Exhibit A of this Appendix.)

           2.2.3 a telephone number (if the customer does not have one assigned)
with the customer on-line.

           2.2.4 service availability dates to the customer;

           2.2.5 information regarding the dispatch / installation schedule, if
applicable;

           2.2.6 PIC options for intraLATA toll (when available) and interLATA
toll;

           2.2.7 address verification.

     2.3 PRE-ORDERING FUNCTIONS FOR UNE WILL INCLUDE:

           2.3.1 customer name, billing address and residence or business
address, billed telephone numbers and features and services available in the
end office where the customer is provisioned;


<PAGE>   165
                                                                   APPENDIX OSS
                                                                   PAGE 4 OF 9

           2.3.2 features and services to which the customer subscribes (LSP
agrees that LSP's representatives will not access the information specified in
this Subsection until after the customer requests that the customer's local
exchange service provider be changed to LSP, and such request complies with
conditions of Exhibit A of this Appendix.)

           2.3.3 telephone number (if the customer does not have one assigned)
with the customer on-line;

           2.3.4 PIC options for intraLATA toll (when available) and interLATA
toll;

           2.3.5 address verification;

           2.3.6 channel facility assignment (CFA), network channel (NC), and
network channel interface (NCI) data.

     2.4   Electronic Access to Pre-Order Functions:  Upon request by
LSP for electronic access to pre-ordering functions, SWBT will
provide LSP access to one or more of the following systems:

           2.4.1 RESALE SERVICES PRE-ORDER SYSTEM AVAILABILITY:

           2.4.1.1 Residential Easy Access Sales Environment (R-EASE): R-EASE is
an ordering entry system through which SWBT will provide LSP access for the
functions of pre-ordering SWBT's Resale services so long as EASE is utilized to
order SWBT Residential Resale Services.

           2.4.1.2 Business Easy Access Sales Environment (EASE):  B-EASE is an
ordering entry system through which SWBT will provide LSP access for the
functions of pre-ordering SWBT's Resale services so long as such access is
utilized to order SWBT's Business Resale Services.

     2.4.2 RESALE AND UNE PRE-ORDER SYSTEM AVAILABILITY:

           2.4.2.1 DataGate:  DataGate is transaction-based data query system
through which SWBT will provide LSP access for the functions of gathering
pre-ordering information to support industry standardized ordering processes
for Residential and Business Resale services. When ordering Resale services or
UNE, LSP's representatives will have access to a pre-order electronic gateway
provided by SWBT for both consumer and business customers that provides
real-time access to SWBT's operations systems. This gateway shall be a
Transmission Control Protocol/Internet Protocol (TCP/IP) gateway and will allow
the LSP representatives to perform the pre-order functions for Resale services
and UNE, as described above. SWBT and LSP agree to work together to develop and
implement an electronic communication interface that will replace this initial
pre-order electronic interface consistent with industry standards developed by
the OBF and the TCIF.

           2.4.2.2 VERIGATE is an Access Service Pre-order system that will
also provide access to the pre-ordering functions for Resale Services and UNE.  
VERIGATE may be used in connection with electronic or manual ordering. 
VERIGATE provides the UNE 


<PAGE>   166

                                                                    APPENDIX OSS
                                                                     PAGE 5 OF 9


pre-order capability of identifying CFA information,
NC, and NCI codes that are associated with order requirements for UNE. 

     2.5   OTHER PRE-ORDER FUNCTION AVAILABILITY:

           2.5.1 Where due dates are not available electronically, SWBT will
provide LSP with due date interval for inclusion in the service order request.

           2.5.2 In addition to electronic interface access to pre-order
information, upon request, SWBT will provide LSP pre-order information in batch
transmission for the purposes of back-up data for periods of system
unavailability.  The parties recognize such information must be used to
construct order requests only in exception handling.

3. ORDERING/PROVISIONING

           3.1 SWBT will provide access to ordering functions to support LSP
provisioning of Resale services and UNE via one or more electronic interfaces. 
Upon request for electronic access to ordering functions, SWBT will provide LSP
access to one or more of the following systems or interfaces:

     3.2   RESALE SERVICES ORDER REQUEST SYSTEM AVAILABILITY:

           3.2.1 R-EASE is available for the generation of Residential Resale
services orders.  Ordering Flows will be available via these systems for the
following ordering functions: Conversion ("as is" or "with changes"); Change
(Features, Listings, Long Distance); New Connect; Disconnect; From and To
(change of premises with same service).

           3.2.2 B-EASE is available for the generation of Business Resale
services orders. Ordering Flows will be available via these systems for the
following ordering functions: Conversion ("as is" or "with changes"); Change
(Features, Listings, Long Distance); New Connect; Disconnect; From and To
(change of premises with same service).

           3.2.3 SWBT will provide LSP with an Electronic Data Interexchange
(EDI) Interface for transmission of industry-standardized Resale service order
requests in formats as defined by the Ordering and Billing Forum (OBF) and EDI
mapping as defined by TCIF. EDI ordering functionality will be made available
as negotiated and implemented in timeframes mutually acceptable to SWBT and
LSP.

     3.3   UNE SERVICE ORDER REQUEST ORDERING SYSTEM AVAILABILITY:

           3.3.1 In ordering and provisioning UNE, LSP and SWBT will utilize
mutually agreeable standard industry order formats and data elements developed
by OBF and TCIF EDI.  Where industry standards do not currently exist for the
ordering and provisioning of UNE, LSP and SWBT agree to jointly develop a form
for ordering Common-Use UNE. Common-Use UNE, including, without limitation,
tandem switching, signaling and call-related databases, Operator Services and
DA, and Operations Support Systems, shall be ordered in a manner that is
consistent with OBF Access Service Request Process; in addition customized
routing will be ordered in the same manner.  Customer Specific UNE, including,
Local Loop (which includes 



<PAGE>   167

                                                                    APPENDIX OSS
                                                                     PAGE 6 OF 9


NID), and unbundled Local Switching, and Interim
Number Portability will be ordered consistent with the OBF Local Service
Request (LSR) process.

     3.4   SWBT will provision Resale Services and UNE as prescribed in
LSP order requests.  Access to status on such orders of Resale
services and UNE will be provided via the following electronic
interfaces:

           3.4.1 Customer Network Administration (CNA)  will allow LSP to check
service order status via CNA.

           3.4.2 In cases of industry-standardized EDI ordering, SWBT will
provide to LSP an EDI electronic interface for transferring and receiving
orders, Firm Order Confirmation (FOC), service completion, and, as available,
other provisioning data and information.  SWBT will provide LSP with a FOC for
each Resale and UNE order.  The FOC includes but is not necessarily limited to: 
purchase order number, telephone number, Local Service Request number, due
date, Service Order number, and completion date.  Upon work completion, SWBT
will provide LSP with an 855 EDI transaction-based Order Completion that states
when that order was completed.  When available, SWBT will provide LSP an 865
EDI transaction-based Order Completion.

           3.4.3 A file transmission may be provided to confirm order
completions for R-EASE or B- EASE order processing.  This file will provide
service order information of all distributed and completed orders for LSP,
regardless of order entry mechanism.

4.   MAINTENANCE/REPAIR

     4.1   Two electronic interfaces are accessible to place, and check the
status of, trouble reports for both Resale and UNE.  Upon request, LSP may
access these functions via the following methods:

           4.1.1 CNA system access provides LSP with SWBT software that allows
LSP to submit trouble reports and subsequently check status on trouble reports
for LSP end-users.  CNA will provide ability to review the maintenance history
of a converted Resale LSP account.

           4.1.2 Electronic Bonding Interface (EBI) is an industry-standardized
interface that is available for trouble report submission and status updates. 
This EBI will  conform to ANSI standards T1:227:1995 and T1.228:1995,
Electronic Communications Implementation Committee (ECIC) Trouble Report Format
Definition (TFRD) Number 1 as defined in ECIC document ECIC/TRA/95-003, and all
standards referenced within those documents, as mutually agreed upon by LSP and
SWBT.  Functions currently implemented will include Enter Trouble, Request
Trouble Report Status, Add Trouble Information, Modify Trouble Report
Attributes, Trouble Report Attribute Value Change Notification, and Cancel
Trouble Report, as explained in 6 and 9 of ANSI T1.228:1995.  LSP.  SWBT will
exchange requests over a mutually agreeable X.25-based network.

5.   BILLING

     5.1 SWBT shall bill LSP for resold services and UNE.  SWBT shall send
associated billing information to LSP as necessary to allow LSP to perform
billing functions.  At minimum

<PAGE>   168

                                                                    APPENDIX OSS
                                                                     PAGE 7 OF 9

SWBT will provide LSP billing information in a paper format or via
magnetic tape, as agreed to between LSP and SWBT.

     5.2   Upon request, electronic access to billing information for Resale
Services will also be available via the following interfaces:

           5.2.1 LSP may receive Bill Plus(TM), an electronic version of their
electronic bill as described in and in accordance with SWBT's Local Exchange
Tariff.

           5.2.2 LSP may receive a mechanized bill format via the industry
standards EDI.

           5.2.3 LSP may also view billing information through the CNA system.

           5.2.4 SWBT shall provide the Usage Billable Records for Resale
Services via EMR industry standard format with a daily feed.

           5.2.5 LSP may receive Local Disconnect Report records (via CARE
records) electronically that indicate when LSP's customers change their local
service provider.

     5.3   Upon request, electronic access to billing information for UNE will
also be available via the following interfaces: 

           5.3.1 SWBT will make available a mechanized bill data tape (local)
format by February 1997.

           5.3.2 LSP may also view billing information through the CNA system.

           5.3.3 SWBT shall provide the Usage/Toll Billable Records for UNE via
EMR industry standard format with a daily feed.

           5.2.4 LSP may receive Local Disconnect Report records (via CARE
records) electronically that indicate when LSP's customers, utilizing SWBT
ports, change their local service provider.

6.   REMOTE ACCESS FACILITY

     6.1   LSP must access the following SWBT's OSS functions via a LSP Remote
Access Facility (LRAF) located in Dallas, Texas:  R-EASE, B-EASE, CNA, DATAGATE
and VERIGATE. 

     6.2   LSP may use three types of access:  Switched, Private Line, and
Frame Relay.  For Private Line and Frame Relay connections, LSP shall provide
its own router, circuit, and two Channel Service Units/Data Service Units
(CSU/DSU).  The demarcation point shall be the router interface at the LRAF. 
Switched Access connections require LSP to provide its own modems and
connection to the SWBT LRAF.  LSP shall pay the cost of the call if Switched
Access is used. 

     6.3   LSP shall use TCP/IP to access SWBT OSS via the LRAF.  In
addition, each LSP shall have a valid Internet Protocol (IP) network
address.  A user-id /password unique to each

<PAGE>   169

                                                                    APPENDIX OSS
                                                                     PAGE 8 OF 9


individual accessing an OSS shall be maintained to access SWBT OSS's. LSP shall
provide estimates regarding its volume of transactions, number of concurrent
users, desired number of private line or dial-up (switched) connections, and
length of a typical session.

     6.4   LSP shall attend and participate in implementation meetings to
discuss LSP LRAF access plans in detail and schedule testing of such
connections.  SWBT shall make a Help Desk function available to assist LSP on
an ongoing basis in accessing any SWBT OSS over the LRAF.

7. OPERATIONAL READINESS TEST (ORT) FOR ORDERING/PROVISIONING

     7.1   LSP must participate with SWBT in Operational Readiness Testing
(ORT), which will allow for the testing of the systems, interfaces, and
processes for the ordering and provisioning of Resale services. ORT will be
completed in conformance with agreed upon implementation dates. 

8. RATES - MISSOURI

     8.1   LSP requesting access to one or more of the SWBT OSS functions
(i.e., preordering, ordering / provisioning, maintenance / repair, billing)
agrees to pay the following rate: 

                   System Access                       $ 3,345.00 / month

     8.2   LSP requesting functions via interfaces that require connection to
the Remote Access Facility, as described in section 6, agrees to pay the
following rate(s) depending upon on method of access utilized: 

     Remote Access Facility Access Methods
                   Direct Connection Per Port          $ 1,580.00 / month 
                   Dial Up Per Port                    $   316.00 / month

     8.4   LPS requesting the Bill Plus, as desribed in 5.2.1, agrees to pay
applicable tariffed rate, less Resale discount. 

     8.3   LSP requesting the billing function for Usage Billable Records, as
described in 5.2.4, agrees to pay $.003 per message transmitted.

     8.4   LSP requesting the Local Disconnect Report, as described in 5.2.5,
agrees to pay $0.10 per record transmitted. 

     8.4   Should unforeseen modifications and costs to provision OSS functions
become required by SWBT or industry standards, SWBT reserves the right to
modify its rate structure.   In addition, should LSP request custom development
of an exclusive interface to support OSS functions, such development will be
considered by SWBT on an Individual Case Basis (ICB) and priced as such.


<PAGE>   170

                                                                    APPENDIX OSS
                                                                     PAGE 9 OF 9
9.   EFFECTIVE DATE, TERM

     9.1   The Appendix OSS will be effective upon approval by the state
commission when it determined that the entire Interconnection Agreement is in
compliance with Sections 251 and 252 of the Act. 

     9.2   The Term Appendix OSS will be the shorter of the Term of this
Interconnection Agreement or December 31, 1998.  Continuation of Appendix OSS
follows the continuation rules of the Agreement.  Should the Interconnection
Agreement establish a new term, the Term of Appendix OSS will be the shorter of
one year, or the new Term of the Interconnection Agreement.  Should the term of
the Interconnection Agreement Expire without provision for continuance, the
Term of Appendix OSS expires as well.


<PAGE>   171

                                         APPENDIX OSS - RESALE & UNE - EXHIBIT A
                                                                     PAGE 1 OF 1



        BLANKET CERTIFICATION FOR END-USER AUTHORIZATION FOR RELEASE OF
                CUSTOMER PROPRIETARY NETWORK INFORMATION (CPNI)

The undersigned hereby agrees:

Before it may obtain CPNI of an end-user, whether via an independent
request or in the course of ordering SWBT's network elements or
services via manual and/or mechanized interfaces, the undersigned
must, at least, certify that "yes" (Y) it has obtained Authorization
for Release of CPNI and provide the name of the individual
authorizing the release of CPNI.  By these indications, the
undersigned affirms that a current Authorization for the Release of
CPNI has been obtained from an end-user and that it includes the
expressed content of the language, "Minimum Scope."  SWBT may then
provide the CPNI referenced herein.

     Minimum Scope:  Authorization for the release of CPNI

     1)    An affirmative written request that substantially reflects the
           following:  "This document serves as instruction to all holders of
           my local exchange telecommunications Customer Proprietary Network
           Information (CPNI) to provide such information to the undersigned.  
           I understand that this CPNI includes the following information: 
           billing name, service address, billing address, service and feature
           subscription, directory listing information long distance carrier
           identity, and all pending service order acitivity.  This
           Authorization remains in effect until such time that I revoke it
           directly or appoint another individual/company with such capacity or
           undersigned receives notice to disconnect my local exchange service
           or notice that a service disconnect has been performed. At and from
           such time, this Authorization is null and void."

or

     2)    Authorization for change in local exchange service and release of
           CPNI with documentation that adheres to all requirements of  state
           and federal law, as applicable.

                                      __________________________________________
                                      Signed

                                      __________________________________________
                                      Name (Typed/Printed)

                                      __________________________________________
                                      Title

                                      __________________________________________
                                      Company

                                      __________________________________________
                                      Date







<PAGE>   172


                                                                     APPENDIX OS
                                                                     PAGE 2 OF 8



                                  APPENDIX OS

                               OPERATOR SERVICES

This Appendix sets forth the terms and conditions under which Southwestern Bell
Telephone Company ("SWBT") agrees to provide Operator Services for LSP ("LSP").

I. SERVICES

     SWBT will provide the following Operator Services:

      A.   FULLY AUTOMATED CALL PROCESSING - Allows the caller to
           complete a call utilizing equipment without the assistance of a SWBT
           operator, hereafter called "Operator."

           This allows the caller the option of completing calls through an
           automated alternate billing system (AABS).  Automated functions can
           only be activated from a touch-tone telephone.  Use of a rotary
           telephone and failure or low response by the caller to the audio
           prompts will bridge the caller to an Operator for assistance.  The
           called party must also have Touch-tone service to automatically
           accept calls that are billed collect or to a third number.

      B.   OPERATOR-ASSISTED CALL PROCESSING - Allows the caller to
           complete a call by receiving assistance from an Operator.

II. DEFINITIONS

      A.   FULLY AUTOMATED CALL PROCESSING

     SWBT will support the following fully automated call types for LSP:

            1.   FULLY AUTOMATED CALLING CARD STATION-TO-STATION -
                 This service is provided when the caller dials zero ("0"),
                 plus the desired telephone number and the telecommunications
                 calling card number to which the call is to be charged.  The
                 call is completed without the assistance of an Operator.  An
                 authorized telecommunications calling card for the purpose of
                 this Appendix, is one for which SWBT can perform billing
                 validation.  Fully-Automated Calling Card Call Service may
                 also include the following situations:

                  a.   When an individual with a disability dials zero
                       (0) and identifies himself or herself as disabled, he or
                       she will provide the Operator the desired telephone
                       number and the calling card number to which the call is
                       to be billed.


<PAGE>   173

                                                                     APPENDIX OS
                                                                     PAGE 3 OF 8



                  b.   When due to trouble on the network,
                       or lack of service components (facilities to the AABS
                       network), the automated call processing cannot be
                       completed without assistance from an Operator.

                  c.   When an Operator reestablishes an
                       interrupted call that meets any of the situations
                       described in this call type.

            2.   FULLY AUTOMATED STATION-TO-STATION - This service
                 is limited to those calls placed collect or billed to a third
                 number.  The caller dials zero (0) plus the telephone number
                 desired, the service selection codes and/or billing
                 information as instructed by the automated equipment.  The
                 call is completed without the assistance of an Operator.
                 Fully Automated Station-to-Station service may also include
                 the following situations:

                  a    When an individual with a disability
                       identifies himself or herself as disabled and provides
                       the Operator the number to which the call is to be
                       billed (either collect or third number).

                  b.   When due to trouble on the network or
                       lack of service components, the automated call cannot be
                       completed without assistance from an Operator.

                  c.   When an Operator reestablishes an
                       interrupted call that meets any of the situations
                       described in this call type.

      B.   OPERATOR-ASSISTED CALL PROCESSING

      SWBT will support the following operator-assisted call types for LSP:

            1.   SEMI-AUTOMATED STATION-TO-STATION - A service
                 provided when the caller dials zero (0) plus the telephone
                 number desired and the call is completed with the assistance
                 of an Operator.  Semi-Automated Station-to-Station service may
                 also include the following situations:

                 a    Where the caller does not dial zero (0)
                      prior to calling the number desired from a public or
                      semi-public telephone, or from a telephone where the call
                      is routed directly to an Operator (excluding calling card
                      calls).

                 b.   When an Operator re-establishes an
                      interrupted call that meets any of the situations
                      described in this call type.

<PAGE>   174

                                                                     APPENDIX OS
                                                                     PAGE 4 OF 8


            2.   SEMI-AUTOMATED PERSON-TO-PERSON - A service in
                 which the caller dials zero (0) plus the telephone number
                 desired and specifies to the Operator the particular person to
                 be reached or a particular PBX station, department or office
                 to be reached through a PBX attendant.  This service
                 applies even if the caller agrees, after the connection is
                 established, to speak to any party other than the party
                 previously specified.  Semi-Automated Person-to-Person
                 service may also include:

                  a.   Where the caller does not dial a zero
                       (0) prior to dialing the number from a public or
                       semi-public telephone, or where the call is routed
                       directly to an Operator.

                  b.   When an operator reestablishes an
                       interrupted call that meets any of the situations
                       described in this call type.

            3.   SEMI-AUTOMATED CALLING CARD STATION-TO-STATION -
                 A service provided when the caller dials zero (0) plus the
                 desired telephone number and provides the Operator the calling
                 card number to which the call is to be charged.
                 Semi-Automated Calling Card Station-to-Station service may
                 also include the following situations:

                  a.   When the caller does not dial zero
                       (0) prior to dialing the number desired from a public or
                       semi-public telephone, or from a telephone that is
                       directly routed to an Operator, and the call is billed
                       to a calling card.

                  b.   When an Operator reestablishes an
                       interrupted call that meets any of the situations
                       described in this call type.

            4.   STATION-TO-STATION (OPERATOR HANDLED) - A service
                 provided when the caller dials zero (0) and places a sent
                 paid, collect, third number or calling card station-to-station
                 call using an Operator's assistance.  These calls may
                 originate from a private, public or semi-public telephone.
                 The service may also include the situation when an Operator
                 reestablishes an interrupted call that meets any of the
                 situations described in this call type.

            5.   PERSON-TO-PERSON (OPERATOR HANDLED) - A service
                 in which the caller dials zero (0) and specifies to the
                 Operator the number desired and the person to be reached, or a
                 particular PBX station, department or office to be reached
                 through a PBX attendant, or a particular mobile service point
                 to be reached through a mobile telephone attendant.  The call
                 remains a person-to-person call even if the caller agrees,
                 after the connection is established, to speak to any party
                 other than the party previously specified.  The service may
                 also include situations when an 



<PAGE>   175

                                                                     APPENDIX OS
                                                                     PAGE 5 OF 8

                 Operator reestablishes an interrupted call that meets any of 
                 the situations described in this call type.

            6.   LINE STATUS VERIFICATION - A service in which the
                 caller asks the Operator to determine the condition of a
                 telephone line.

            7.   BUSY LINE INTERRUPT - A service in which the
                 caller asks the Operator to interrupt a conversation in
                 progress, to determine if one of the parties is willing to
                 speak to the caller requesting the interrupt.  A Busy Line
                 Interrupt charge will apply even if no conversation is in
                 progress at the time of the interrupt attempt, or when the
                 parties interrupted refuse to terminate the conversation in
                 progress.

            8.   0PERATOR TRANSFER SERVICE - A service offered by
                 SWBT in which the local caller requires Operator Assistance
                 for completion of a call outside the originating LATA.  The
                 SWBT Operator transfers the call to an interexchange carrier
                 selected by the caller from a list of IXCs provided to SWBT by
                 the LSP.  This transfer service is similar to SWBT's "0perator
                 Transfer" service offering.  LSP agrees to obtain all
                 necessary compensation arrangements between LSP and
                 participating carriers.

            9.   MISCELLANEOUS - Includes the following call
                 types:  General Assistance and Rate Quotes, 800, 888 and
                 connections to all other Toll Free services, Repair Bureau and
                 Business Office requests, credit requests, NPA-NXX location
                 requests, and all other 0- No Attempt services.

III. CALL BRANDING AND RATE REFERENCE REQUIREMENTS

      A.   REQUIREMENTS - Pursuant to Section  226 (b) of The
           Telecommunications Act of 1996, each provider of Operator Services
           is required to:

            1.   provide its brand at the beginning of each
                 telephone call and before the consumer incurs any charge for
                 the call; and

            2.   disclose immediately to the consumer, upon
                 request a quote of its rates or charges for the call.

      B.   CALL BRANDING - In compliance with A. 1. above, SWBT will
           brand Operator Services in LSP's name based upon the criteria
           outlined below:

            1.   LSP will provide SWBT with written specification
                 of its company name to be used in creating LSP specific
                 branding messages for its OS calls.

<PAGE>   176

                                                                     APPENDIX OS
                                                                     PAGE 6 OF 8


            2.   An initial non-recurring charge applies per TOPS
                 switch, per load for the establishment of Call Branding as
                 well as a charge per TOPS switch, per subsequent load to
                 change the brand.  In addition, a per call charge applies for
                 every Operator Services call handled by SWBT on behalf of LSP
                 when such services are provided in conjunction with:  i) the
                 purchase of SWBT's unbundled local switching; or ii) when
                 multiple brands are required on a single Operator Services
                 trunk.  Prices for Call Branding are as outlined in Exhibit
                 II, attached hereto and incorporated herein.

      C.   OPERATOR SERVICES (OS) RATE/REFERENCE INFORMATION - In
           compliance with A.2. above, SWBT will provide LSP Operator Services
           Rate/Reference Information based upon the criteria outlined below:

            1.   LSP will furnish OS Rate and Reference
                 Information in a mutually agreed to format or media thirty
                 (30) days in advance of the date when the Operator Services
                 are to be undertaken.

            2.   LSP will inform SWBT, in writing, of any changes
                 to be made to such Rate/Reference Information ten (10) working
                 days prior to the effective Rate/Reference change date.  LSP
                 acknowledges that it is responsible to provide SWBT updated
                 Rate/Reference Information in advance of when the
                 Rates/Reference Information are to become effective.

            3.   In all cases when a SWBT Operator receives a rate
                 request from a LSP end user, SWBT will quote the applicable OS
                 rates as provided by LSP.

            4.   An initial non-recurring charge will apply per
                 TOPS switch for loading of LSP's Operator Services
                 Rate/Reference Information as well as a charge per TOPS
                 switch, for each subsequent change to either LSP's Operator
                 Services Rate or Reference Information.

IV. HANDLING OF EMERGENCY CALLS TO OPERATOR

      To the extent LSP's NXX encompasses multiple emergency agencies, SWBT
      will agree to query the caller on his/her community and to transfer the
      caller to the appropriate emergency agency for the caller's area.  LSP
      must provide SWBT with the correct information to enable the transfer.
      When the assistance of another Carrier's operator is required, SWBT will
      attempt to reach the appropriate operator if the network facilities for
      inward assistance exist.  LSP agrees to indemnify SWBT for any
      misdirected calls.

V. RESPONSIBILITIES OF THE PARTIES

      A.   SWBT will be the sole provider of Operator Services for LSP's
           local service area(s) listed in Exhibit I, which is attached to this
           Appendix, beginning on the service effective date also shown in
           Exhibit I.  SWBT will provide Operator 

<PAGE>   177


                                                                     APPENDIX OS
                                                                     PAGE 7 OF 8


           Services only where the necessary physical facilities are available 
           and in place and under conditions previously stated in this Appendix.

      B.   LSP will be responsible for providing the equipment and
           facilities necessary for signaling and routing calls with Automatic
           Number Identification (ANI) to each SWBT operator switch.  Should
           LSP seek to provide interexchange Operator Services under this
           agreement, it is responsible for ordering the necessary facilities
           through SWBT's interstate or intrastate Access Service tariffs.
           Nothing in this agreement in any way changes the manner in which an
           interexchange Carrier obtains access service for the purpose of
           originating or terminating interexchange traffic.

      C.   Facilities necessary for the provision of Operator Services
           shall be provided by the parties hereto, using standard trunk
           traffic engineering procedures to insure that the objective grade of
           service is met.  Each party shall bear the costs for its own
           facilities.  LSP shall bear the costs of facilities necessary for
           signaling and routing calls with Automatic Number Identification
           (ANI) to each SWBT operator switch.  SWBT shall bear the cost of
           facilities and equipment necessary to provide Operator Services.

      D.   LSP will furnish in writing to SWBT, thirty (30) days in
           advance of the date when the Operator Services are to be undertaken,
           unless otherwise agreed to by the SWBT, all records required by SWBT
           to provide the Operator Services.

      E.   LSP will keep all records furnished to SWBT current by using
           reporting forms and procedures that are mutually acceptable to both
           parties, and will inform SWBT in advance of any changes to be made
           in such records.  SWBT will specify the required interval for such
           advance notice.  LSP will provide all records and changes to records
           to SWBT in writing or in any other mutually agreeable format.

      F.   SWBT will accumulate and provide the LSP such data as
           necessary for the LSP to verify traffic volumes and bill its end
           users.

VI. METHODS AND PRACTICES

      SWBT will provide the Operator Services to LSP's end users in accordance
      with SWBT's OS methods and practices in effect for SWBT at the time the
      OS call is made, unless otherwise agreed in writing by both parties.

VII. PRICING

      Pricing for Operator Services shall be based on the rates specified in
      Exhibit II, PRICING, which is attached and made part of this Appendix.
      The rates will apply from the service effective date through the term of
      this agreement as specified in paragraph X., 



<PAGE>   178

                                                                     APPENDIX OS
                                                                     PAGE 8 OF 8


      A. below.  At any time beyond the specified or the term of this Appendix, 
      SWBt may change the prices for the provision of OS upon one hundred-
      twenty (120) days' notice to LSP.

VIII. MONTHLY BILLING

      SWBT will render monthly billing statements to LSP, and remittance in
      full will be due within thirty (30) days of receipt.

IX. LIABILITY

      A.   In addition to the liability provisions contained in the
           Agreement, LSP agrees to defend, indemnify, and hold harmless SWBT
           from any and all losses, damages, or other liability including
           attorneys fees that LSP may incur as a result of claims, demands,
           wrongful death actions, or other suits brought by any party that
           arise out of LSP's end users use of Operator Services.  LSP shall 
           defend against all end user claims just as if LSP had provided such
           service to its end user with the LSP's own operators and shall
           assert its tariff limitation of liability for benefit of both SWBT
           and LSP.

      B.   LSP also agrees to release, defend, indemnify, and hold
           harmless SWBT from any claim, demand or suit that asserts any
           infringement or invasion of privacy or confidentiality of any person
           or persons caused or claimed to be caused, directly, or indirectly,
           by SWBT employees and equipment associated with provision of the
           Operator Services.  This provision includes but is not limited to
           suits arising from disclosure of the telephone number, address, or
           name associated with the telephone called or the telephone used to
           call the Operator Services.

X. TERMS OF APPENDIX

      A.   Unless sooner terminated, this Appendix will continue in
           force for a period of one (1) year from the effective date of this
           agreement and thereafter until terminated by one hundred-twenty
           (120) days notice in writing from either Party to the other.

      B.   If LSP terminates this agreement prior to the agreed-upon
           term of this Appendix, LSP shall pay, within thirty (30) days of the
           issuance of a final bill by SWBT, all amounts due for actual
           services provided under this Appendix, plus estimated monthly
           charges for the remainder of the term.  Estimated charges will be
           based on an average of the actual monthly amounts billed by SWBT
           pursuant to this Appendix prior to its termination.

      C.   The rates applicable for determining the amount(s) under the
           terms outlined in this Section are those specified in Exhibit II.

<PAGE>   179

                                                         APPENDIX OS - EXHIBIT I
                                                                     PAGE 1 OF 1



                                  APPENDIX OS
                             LOCAL SERVICE AREA(S)

                             EFFECTIVE:
                                       ------------------------
                                                     (mm/dd/yr)

The following table depicts the service area(s) covered by this Appendix:

LSP'S LOCAL SERVICE AREA(S)             EFFECTIVE DATE
- ---------------------------             --------------

- ---------------------------             --------------------------------

- ---------------------------             --------------------------------

- ---------------------------             --------------------------------

- ---------------------------             --------------------------------


<PAGE>   180

                                                        APPENDIX OS - EXHIBIT II
                                                                     PAGE 1 OF 1



                                  APPENDIX OS
                                    MISSOURI
                                   EXHIBIT II
                           PRICING - FCILITIES BASED

                           EFFECTIVE:
                                     ----------------
                                           (mm/dd/yr)

The following rates will apply for each service element:

A. FULLY AUTOMATED CALL PROCESSING

This usage rate applies to each call that has been completed on a
fully automated basis.

                                    Rate per completed automated call  $   0.173

B. OPERATOR-ASSISTED CALL PROCESSING

This usage rate applies to each call that has been answered by or
forwarded to an operator.

                                          Rate per actual work second  $   0.020
C. CALL BRANDING

An initial non-recurring charge applies per TOPS switch, per brand
for the establishment of LSP specific Call Branding.  An additional
non-recurring charge applies for each subsequent change to the
branding

                                          Rate per initial load group  $2,325.00
                                       Rate per load for Brand change  $2,325.00
                                                          Per Call(1)  $    0.02

D. OPERATOR SERVICES RATE/REFERENCE INFORMATION

An initial non-recurring charge applies per TOPS switch, per rate
schedule, for the initial load of LSP's Operator Services Rate/
Reference Information.  An additional non-recurring charge applies
for each subsequent change to Rate/Reference Information.

                                                Rate per initial load  $3,650.00
                                      Rate per subsequent rate change  $2,650.00
                                 Rate per subsequent reference change  $2,650.00

- -----------------------
(1)  A per call charge will apply when OS are provided in conjunction with:  i)
unbundled local switching or ii) when multiple brands are required on a single
operator services trunk



<PAGE>   181
                                                                   APPENDIX NIM
                                                                    PAGE 2 OF 5

                 APPENDIX NETWORK INTERCONNECTION METHODS (NIM)

         This Appendix NIM designates Network Interconnection Methods (NIMs) to
be used by the Parties. These include, but are not limited to: MidSpan Fiber
Interconnection (MSFI); Virtual Collocation Interconnection; SONET Based
Interconnection; Physical Collocation Interconnection; leasing of SWBT
facilities; and other methods as mutually agreed to by the Parties.

1.       MID-SPAN FIBER INTERCONNECTION (MSFI)

         Mid-Span Fiber Interconnection (MSFI) between Southwestern Bell
         Telephone (SWBT) and LSP can occur at any mutually agreeable,
         economically and technically feasible point between LSP's premises and
         a SWBT tandem or end office. This interconnection will be on a
         point-to-point SONET system over single mode fiber optic cable.

         MSFI may be used to provide interconnection trunking as defined in
         Appendix ITR to Attachment 11: Network Interconnection Architecture.

A.       There are two basic mid-span interconnection designs:

         1.       Design One: LSP's fiber cable and SWBT's fiber cable are
                  connected at an economically and technically feasible point
                  between the LSP location and the last entrance manhole at the
                  SWBT central office.

                  The Parties may agree to a location with access to an existing
                  SWBT fiber termination panel. In these cases, the network
                  interconnection point (POI) shall be designated outside of the
                  SWBT building, even though the LSP fiber may be physically
                  terminated on a fiber termination panel inside of a SWBT
                  building. In this instance, LSP will not incur fiber
                  termination charges and SWBT will be responsible for
                  connecting the cable to the SWBT facility.

                  The Parties may agree to a location with access to an existing
                  LSP fiber termination panel. In these cases, the network
                  interconnection point (POI) shall be designated outside of the
                  LSP building, even though the SWBT fiber may be physically
                  terminated on a fiber termination panel inside of an LSP
                  building. In this instance, SWBT will not incur fiber
                  termination charges and LSP will be responsible for connecting
                  the cable to the LSP facility.

                  If a suitable location with an existing fiber termination
                  panel cannot be agreed upon, LSP and SWBT shall mutually
                  determine provision of a fiber termination panel housed in an
                  outside, above ground, cabinet placed at the physical POI.
                  Ownership and the cost of provisioning the panel will be
                  negotiated between the two parties.
<PAGE>   182
                                                                  APPENDIX NIM
                                                                    PAGE 3 OF 5

         2.       Design Two: LSP will provide fiber cable to the last entrance
                  manhole at the SWBT tandem or end office switch with which LSP
                  wishes to interconnect. LSP will provide a sufficient length
                  of fiber optic cable for SWBT to pull the fiber cable to the
                  SWBT cable vault for termination on the SWBT fiber
                  distribution frame (FDF). In this case the POI shall be at the
                  manhole location.

                  Each Party is responsible for designing, provisioning,
                  ownership and maintenance of all equipment and facilities on
                  its side of the POI. Each Party is free to select the
                  manufacturer of its Fiber Optic Terminal (FOT). Neither Party
                  will be allowed to access the Data Communication Channel (DCC)
                  of the other Party's FOT. The Parties will work cooperatively
                  to achieve equipment compatibility.

B.       The Parties will mutually agree upon the precise terms of each mid-span
         interconnection facility. These terms will cover the technical details
         of the interconnection as well as other network interconnection,
         provisioning and maintenance issues.

C.       The LSP location includes FOTs, multiplexing and fiber required to take
         the optical signal handoff from SWBT for interconnection trunking as
         outlined in Appendix ITR.

D. The fiber connection point may occur at several locations:

         1.       a location with an existing SWBT fiber termination panel. In
                  this situation, the POI shall be outside the SWBT building
                  which houses the fiber termination panel;

         2.       a location with access to an existing LSP fiber termination
                  panel. In these cases, the network interconnection point (POI)
                  shall be designated outside of the LSP building, even though
                  the SWBT fiber may be physically terminated on a fiber
                  termination panel inside a LSP building;

         3.       a location with no existing SWBT fiber termination panel. In
                  this situation, SWBT and LSP will negotiate provisioning,
                  maintenance and ownership of a fiber termination panel and
                  above ground outside cabinet as a POI and for connection of
                  the fiber cables;

         4.       a manhole outside of the SWBT central office. In this
                  situation, LSP will provide sufficient fiber optic cable for
                  SWBT to pull the cable into the SWBT cable vault for
                  termination on the SWBT FDF. The POI will be at the manhole
                  and SWBT will assume maintenance responsibility for the fiber
                  cabling from the manhole to the FDF.

E.       The SWBT tandem or end office switch includes all SWBT FOT,
         multiplexing and fiber required to take the optical signal hand-off
         provided from LSP for interconnection 

<PAGE>   183
                                                                  APPENDIX NIM
                                                                    PAGE 4 OF 5


         trunking as outlined in Appendix ITR. This location is SWBT's
         responsibility to provision and maintain.

F.       In both designs, LSP and SWBT will mutually agree on the capacity of
         the FOT(s) to be utilized. The capacity will be based on equivalent
         DS1s that contain trunks and interLATA traffic. Each Party will also
         agree upon the optical frequency and wavelength necessary to implement
         the interconnection. The Parties will develop and agree upon methods
         for the capacity planning and management for these facilities, terms
         and conditions for over provisioning facilities, and the necessary
         processes to implement facilities as indicated below. These methods
         will meet quality standards as mutually agreed to by LSP and SWBT.

2.       AVOIDANCE OF OVER PROVISIONING

         Underutilization is the inefficient deployment and use of the network
         due to forecasting a need for more capacity than actual usage requires,
         and results in unnecessary costs for SONET systems. To avoid over
         provisioning, the Parties will agree to joint facility growth planning
         as detailed below.

3.       JOINT FACILITY GROWTH PLANNING

         The initial fiber optic system deployed for each interconnection shall
         be the smallest standard available. For SONET this is an OC-3 system.
         The following list the criteria and processes needed to satisfy
         additional capacity requirements beyond the initial system.

A.       Criteria:

         1. Investment is to be minimized;

         2. Facilities are to be deployed in a "just in time" fashion.

B.       Processes

         1.       discussions to provide relief to existing facilities will be
                  triggered when either Party recognizes that the overall system
                  facility (DS1s) is at 90% capacity;

         2.       both Parties will perform a joint validation to ensure current
                  trunks have not been over-provisioned. If any trunk groups are
                  over-provisioned, trunks will be turned down as appropriate.
                  If any trunk resizing lowers the fill level of the system
                  below 90%, the growth planning process will be suspended and
                  will not be reinitiated until a 90% fill level is achieved.
                  Trunk design blocking criteria described in Appendix ITR will
                  be used in determining trunk group sizing requirements and
                  forecasts;
<PAGE>   184
                                                                  APPENDIX NIM
                                                                    PAGE 5 OF 5

         3.       if based on the forecasted equivalent DS1 growth, the existing
                  fiber optic system is not projected to exhaust within one
                  year, the Parties will suspend further relief planning on this
                  interconnection until a date one year prior to the projected
                  exhaust date. If growth patterns change during the suspension
                  period, either Party may re-initiate the joint planning
                  process;

         4.       if the placement of a minimum size FOT will not provide
                  adequate augmentation capacity for the joint forecast over a
                  two year period, and the forecast appears reasonable based
                  upon history, the next larger system may be deployed. In the
                  case of a SONET system, the OC-3 system could be upgraded to
                  an OC-12. If the forecast does not justify a move to the next
                  larger system, another minimal size system (such as on OC-3)
                  could be placed. This criteria assumes both Parties have
                  adequate fibers for either scenario. If adequate fibers do not
                  exist, both Parties would negotiate placement of additional
                  fibers;

         5.       both Parties will negotiate a project service date and
                  corresponding work schedule to construct relief facilities in
                  an effort to achieve "just in time" deployment;

         6.       the joint planning process/negotiations should be completed
                  within two months of identification of 90% fill.

4.       VIRTUAL COLLOCATION INTERCONNECTION

         The description of Virtual Collocation Interconnection is contained in
         SWBT's Virtual Collocation tariffs (i.e., SWBT's Tariff F.C.C. No. 73).

5.       SONET-BASED INTERCONNECTION

         The description of SONET-Based Interconnection is contained in SWBT's
         Sonet-Based Interconnection tariffs (i.e., SWBT's Tariff F.C.C. No.
         73).

6.       PHYSICAL COLLOCATION INTERCONNECTION

         SWBT will provide Physical Collocation Interconnection on
         nondiscriminatory terms and conditions at the time LSP requests such
         interconnection.

7.       LEASING OF SWBT'S FACILITIES

         LSP's leasing of SWBT's facilities for purposes of Attachment 11:
         Network Interconnection Architecture will be subject to the mutual
         agreement of the Parties.
<PAGE>   185
                         PHYSICAL COLLOCATION AGREEMENT




                                     BETWEEN




                       SOUTHWESTERN BELL TELEPHONE COMPANY



                                       AND


                             DIGITAL TELEPORT, INC.

                                     for

                                   MISSOURI
<PAGE>   186

                              TABLE OF ARTICLES

<TABLE>
<S>                                                                                                                    <C>
ARTICLE I - PREMISES...................................................................................................-1-

ARTICLE II - EFFECTIVENESS AND REGULATORY APPROVAL.....................................................................-2-

ARTICLE III - TERM.....................................................................................................-3-

ARTICLE IV - PREMISES CHARGES..........................................................................................-4-

ARTICLE V - INTERCONNECTION CHARGES....................................................................................-7-

ARTICLE VI  - FIBER OPTIC CABLE AND DEMARCATION POINT..................................................................-7-

ARTICLE VII - USE OF PREMISES..........................................................................................-8-

ARTICLE VIII - STANDARDS..............................................................................................-10-

ARTICLE IX - RESPONSIBILITIES OF THE INTERCONNECTOR...................................................................-11-

ARTICLE X - QUIET ENJOYMENT...........................................................................................-13-

ARTICLE XI - ASSIGNMENT...............................................................................................-13-

ARTICLE XII - CASUALTY LOSS...........................................................................................-13-

ARTICLE XIII - RE-ENTRY...............................................................................................-14-

ARTICLE XIV -  LIMITATION OF LIABILITY................................................................................-15-

ARTICLE XV - INDEMNIFICATION OF SWBT..................................................................................-16-

ARTICLE XVI - SERVICES, UTILITIES, MAINTENANCE AND FACILITIES.........................................................-17-

ARTICLE XVII - LIMITATION OF ACTIONS; DISPUTE RESOLUTION..............................................................-17-

ARTICLE XVIII - SUCCESSORS BOUND......................................................................................-19-

ARTICLE XIX - CONFLICT OF INTEREST....................................................................................-19-

ARTICLE XX - NON-EXCLUSIVE REMEDIES...................................................................................-20-

ARTICLE XXI - NOTICES.................................................................................................-20-

ARTICLE XXII - COMPLIANCE WITH LAWS...................................................................................-20-

ARTICLE XXIII - OSHA STATEMENT........................................................................................-21-

ARTICLE XXIV - INSURANCE..............................................................................................-21-

ARTICLE XXV - SWBT'S RIGHT OF ACCESS..................................................................................-24-

ARTICLE XXVI - PURPOSE AND SCOPE OF AGREEMENT.........................................................................-24-
</TABLE>




<PAGE>   187
<TABLE>

<S>                                                                                                                   <C>
ARTICLE XXVII - MISCELLANEOUS.........................................................................................-25-
</TABLE>

<PAGE>   188

                        PHYSICAL COLLOCATION AGREEMENT


         THIS PHYSICAL  COLLOCATION  AGREEMENT  ("Agreement") is made this _____
day of __, 19__ by and  between  SOUTHWESTERN  BELL  TELEPHONE  COMPANY,  a
Missouri corporation  ("SWBT"),  and Digital  Teleport,  Inc., a [STATE OF
INCORPORATION] corporation ("Interconnector").

                                  WITNESSETH

         WHEREAS, SWBT is an incumbent local exchange carrier having a statutory
duty  to  provide  for  "physical   collocation"  of  "equipment  necessary  for
interconnection  or access to unbundled  network  elements" at its premises,  47
U.S.C. 251(c)(6);

         WHEREAS, the Interconnector  wishes to physically locate certain of its
equipment within the Premises (as defined herein) and connect with SWBT;

         NOW THEREFORE,  in consideration of the mutual agreements and covenants
contained  herein and other good and  valuable  consideration,  the  receipt and
sufficiency of which is hereby  acknowledged,  SWBT and the Interconnector  (the
"parties") agree as follows:

                             ARTICLE I - PREMISES

         1.1  Right  to  Use.   Subject  to  this  Agreement,   SWBT  grants  to
Interconnector  the  right  to  use  the  premises  described  on  Exhibit  ____
("Premises"), attached and incorporated herein, within real property at
__________ in the City of ______________________, County of ______________, 
State of _________________.

         1.2  Relocation.  Notwithstanding  Section  1.1, in the event that SWBT
determines  it  necessary  for the  Premises to be moved  within the building in
which the Premises is located  ("Building") or to another SWBT wire center,  the
Interconnector is required to do so. In such an event, the Interconnector  shall
be  responsible  for the  preparation of the new premises at the new location if
such relocation arises from circumstances beyond the reasonable control of SWBT,
including  condemnation  

<PAGE>   189

                                     -2-

or government order or regulation that makes the continued occupancy of the
Premises or Building uneconomical in SWBT's sole judgment. Otherwise SWBT shall
be responsible for any such preparation.

         In the event that the  Interconnector  requests that the Premises be
moved within the Building or to another SWBT wire center, SWBT shall permit the
Interconnector to relocate the Premises, subject to the  availability of space
and associated requirements.  The Interconnector shall be responsible for all
applicable charges associated with the move, including the reinstallation of its
equipment and facilities  and the preparation  of the new Premises and the new
wire center as applicable.

         In either such event, the new premises shall be deemed the "Premises"
hereunder and the new wire center the "Building."

         1.3 The Premises. SWBT agrees, at the Interconnector's sole cost and
expense as set forth herein, to prepare the Premises in accordance with working
drawings and specifications entitled ___________________ ___________________ and
dated ________________________, which documents, marked Exhibit _____, are
attached and incorporated herein. The preparation shall be arranged by SWBT in
compliance with all applicable codes, ordinances, resolutions, regulations and
laws. After the Interconnector has made the initial payments required by Section
4.4 and the state regulatory approval is obtained in accordance with Section 2.1
hereof, SWBT agrees to pursue diligently the preparation of the Premises for use
by the Interconnector.

              ARTICLE II - EFFECTIVENESS AND REGULATORY APPROVAL

         2.1 Submission to State Commission. The effectiveness of this Agreement
is conditioned upon the unqualified approval of this Agreement, whether as a
result of an approval process or by operation of law, under 47 U.S.C. 252(a)(1).
After execution of this Agreement, the parties shall submit it to the State
commission for the State in which the Premises is located as thereby required
for approval, and shall defend the Agreement and support any reasonable effort
to have this Agreement so approved, 

<PAGE>   190

                                     -3-


including the supplying of witnesses and testimony if a hearing is to be held.

         2.2 Failure to Receive Approval. In the event that this Agreement does
not receive such unqualified approval, this Agreement shall be void upon written
notice of either party to the other after such regulatory action becomes final
and unappealable. Thereafter Interconnector may request to begin negotiations
again under 47 U.S.C. 251. Alternatively, the parties may both agree to modify
this Agreement to receive such approval, but neither shall be required to agree
to any modification. Any agreement to modify shall not waive the right of either
party to pursue any appeal of the ruling made by any reviewing regulatory
commission.

         2.3 Preparation Prior to Regulatory Approval. At the written election
of the Interconnector, SWBT shall begin preparing the Premises for the
Interconnector prior to receiving the approval required by Section 2.1 hereof.
The sole evidence of such election shall be the payment to SWBT of the initial
payments specified in Sections 4.4. Payment to SWBT of the remaining charges
under these Sections shall be due upon completion. Upon such an election, this
Agreement shall become effective but only insofar as to be applicable to the
Premises preparation. In the event that the Agreement does not become fully
effective as contemplated by this Article, the Interconnector shall not be
entitled to any refund or return of any such payments beyond any portion of the
charges paid but not attributable to costs incurred by SWBT. To the extent that
SWBT has incurred preparation costs not included within any payment made by the
Interconnector, the Interconnector shall pay those costs within thirty (30) days
of notice by SWBT.

                               ARTICLE III - TERM

         3.1 Commencement Date. This Agreement shall be month-to-month,
beginning on the "Commencement Date." The "Commencement Date" shall be the first
day after this Agreement becomes effective in accordance with Article II hereof.

         3.2 Occupancy. Unless there are unusual circumstances, SWBT will notify
the Interconnector 

<PAGE>   191
                                     -4-

that the Premises is ready for occupancy within ____ days after receipt of the
payments due under Sections 4.4. The Interconnector must place operational
telecommunications equipment in the Premises and connect with SWBT's network
within sixty (60) days after receipt of such notice; provided, however, that
such 60-day period shall not begin until regulatory approval is obtained under
Article II. If the Interconnector fails to do so, this Agreement is terminated
except that the Interconnector shall be liable in an amount equal to the unpaid
balance of the charges due under and, further, shall continue to be bound by
Articles II, IV, XI, XIV, XV, XVII, XVIII, XX, XXI, XXVI and XXVII hereof. For
purposes of this Section, the Interconnector's telecommunications equipment is
considered to be operational and interconnected when connected to SWBT's network
for the purpose of providing service.

                          ARTICLE IV - PREMISES CHARGES


         4.1 Monthly Charges. Beginning on the Commencement Date, Interconnector
shall pay to SWBT a charge of __________ Dollars ($_______ ) per month for use
of the Premises. The monthly charge may be increased upon thirty (30) days'
notice by SWBT.

         4.2 Billing. Billing shall occur on or about the 25th day of each
month, with payment due thirty (30) days from the bill date. SWBT may change its
billing date practices upon thirty (30) days notice to the Interconnector.

         4.3 Preparation Charge. (a) The one-time charge for preparing the
Premises for use by the Interconnector is estimated to be __________________
Dollars ($XXX.XX) ("Preparation Charge"), which consists of two components: (i)
the charge to the Interconnector associated with modifying the Building to
provide physical collocation ("Common Charge"), and (ii) the charge associated
with preparing the Premises ("Premises Charge"). Of the Preparation Charge
___________ Dollars ($XXX.XX) is the estimate for subcontractor charges
("Subcontractor Charges").

         (b) SWBT will contract for and perform the construction and preparation
activities underlying the 

<PAGE>   192

                                     -5-


Preparation Charge, including the Common Charge, the Premises Charge, and the
Subcontractor Charges, and any Custom Work charges, using same or consistent
practices that are used by SWBT for other construction and preparation work
performed in the Building. Subject to an appropriate non-disclosure agreement,
SWBT will permit the Interconnector to inspect supporting documents for the
Preparation Charge, including the Common Charge (if the Interconnector is the
initial physical collocator as used in Section 4.5(b)) and the Premises Charge,
and any Custom Work charge. Any dispute regarding such SWBT charges will be
subject to the dispute resolution provisions hereof.

         4.4 Payment of Premises Charge. Prior to any obligation on SWBT to
start any preparation of the Premises, the Interconnector shall pay SWBT fifty
percent (50%) of the Premises Charge and eighty-five percent (85%) of any custom
work charge required to create or vacate any entrance facility for the
Interconnector ("Custom Work"), and shall be due no later than ten (10) business
days after the Agreement has become effective in accordance with Article II
hereof. The remainder of the Premises Charge and any Custom Work charge are due
upon completion and prior to occupancy by the Interconnector.

         4.5 Payment of Common Charge. (a) In addition and prior to any
obligation on SWBT to start any preparation of the Building for physical
collocation, the Interconnector shall pay SWBT fifty percent (50%) of the Common
Charge. The other fifty percent (50%) of the Common Charge is due upon
completion and prior to occupancy by the Interconnector.

         (b) The first entity to which SWBT provides physical collocation in the
Building shall be responsible for all costs incurred by SWBT associated with the
preparation of the Building to provide physical collocation in the initial space
where physical collocation is to be located ("Initial Common Charge").
Thereafter the Initial Common Charge will be prorated and the prorated share
refunded to the previous physical collocator(s) as additional entities use
physical collocation in the Building within twelve (12) months of the first
billing date of the initial monthly charge for the first physical collocator in
the Building, using the following schedule:


<PAGE>   193

                                     -6-


<TABLE>
<CAPTION>

Collocator                 Initial Common Charge         Refund
- ----------                 ---------------------         ------
<S>                               <C>                    <C>   
   1st                            100%                    NA
   2nd                             50%                    50%
   3rd                             33 1/3%                16 2/3%
   4th                             25%                     8 1/3%
   5th and beyond                   0%                     0%
</TABLE>

To the extent that a physical collocator uses a space other than such initial
space, SWBT shall refund to the Interconnector the portion of the Initial Common
Charge applicable to such collocator based on the relative use of such initial
space in a manner consistent with the above methodology and other terms of this
Agreement.

         (c) No interest will be paid on refunds. Refunds shall be based on the
Initial Common Charge actually paid by the first physical collocator.

         (d) Notwithstanding the above, SWBT shall have no obligation to remit
any amount that would result in SWBT being unable to retain the full amount of
the Initial Common Charge or to remit any amount based upon charges not actually
collected.

         4.6 Payment of Preparation Charge. SWBT is not obligated to start any
preparation of the Premises until the Interconnector pays SWBT fifty percent
(50%) of the Preparation Charge and eighty-five percent (85%) of the charges for
any Custom Work charge. Such charges shall be due no later than ten (10)
business days after the Agreement has become effective in accordance with
Article II hereof. The remainder of the Preparation Charge and any Custom Work
charge are due upon completion and prior to occupancy by the Interconnector.
 
         4.7 Occupancy Conditioned on Payment. SWBT shall not permit the
Interconnector to have access to the Premises for any purpose other than
inspection until SWBT is in receipt of complete payment of the Preparation
Charge and any Custom Work charges.

         4.8 Subcontractor Charges. Within one hundred twenty (120) days of the
completion date of the Premises, SWBT shall perform a true-up of all
Subcontractor Charges using the actual amounts billed by subcontractors. Any
amounts incurred above the Subcontractor Charges will be billed to the

<PAGE>   194

                                     -7-


Interconnector or, alternatively, any amount below such Charges will be remitted
to the Interconnector.

         4.9 Breach Prior to Commencement Date. In the event that the
Interconnector materially breaches this Agreement by purporting to terminate
this Agreement after SWBT has begun preparation of the Premises but before SWBT
has been paid the entire amounts due under this Article, then in addition to any
other remedies that SWBT might have, the Interconnector shall be liable in the
amount equal to the non-recoverable costs less estimated net salvage.
Non-recoverable costs include the non-recoverable cost of equipment and material
ordered, provided or used; trued-up Subcontractor Charges, the non-recoverable
cost of installation and removal, including the costs of equipment and material
ordered, provided or used; labor; transportation and any other associated costs.

         4.10 Late Payment Charge. In the event that any charge is not paid when
due, the unpaid amounts shall bear interest in accordance with the terms and
conditions set forth in SWBT's intrastate tariff late payment provision(s)
applicable to access services for the State in which the Premises is located, or
the highest rate permitted by law, whichever is lower, from the due date until
paid.

                       ARTICLE V - INTERCONNECTION CHARGES

         5.1 Charges for interconnection shall be as set forth in any
interconnection agreement between SWBT and the interconnector and any applicable
tariffs.

              ARTICLE VI - FIBER OPTIC CABLE AND DEMARCATION POINT

         6.1 Fiber Entrances. The Interconnector shall use a single mode
dielectric fiber optic cable as a transmission medium to the Premises. The
Interconnector shall be permitted no more than two (2) entrance routes into the
Building, if available. 

         6.2 Demarcation Point. SWBT shall designate the point(s) of termination
within the Building as the point(s) of physical demarcation between the
Interconnector's network and SWBT's network, with 

<PAGE>   195
                                     -8-

each being responsible for maintenance and other ownership obligations and
responsibilities on its side of that demarcation point. SWBT anticipates that
the demarcation point will be within the point-of-termination frame.

                          ARTICLE VII - USE OF PREMISES

         7.1 Nature of Use. The Premises are to be used by the Interconnector
for purposes of locating equipment and facilities within SWBT's central offices
to connect with SWBT services only. Consistent with the nature of the Building
and the environment of the Premises, the Interconnector shall not use the
Premises for office, retail, or sales purposes. No signage or markings of any
kind by the Interconnector shall be permitted on the Building or on the grounds
surrounding the Building.

         7.2 Equipment List. A list of all of the Interconnector's equipment and
facilities that will be placed within the Premises is set forth on Exhibit ___,
attached and incorporated herein, with the associated power requirements, floor
loading, and heat release of each piece. The Interconnector warrants and
represents that Exhibit __ is a complete and accurate list, and acknowledges
that any incompleteness or inaccuracy would be a material breach of this
Agreement. The Interconnector shall not place or leave any equipment or
facilities within the Premises beyond those listed on Exhibit ___ without the
express written consent of SWBT.

         7.2.1 Subsequent Requests to Place Equipment. In the event that
subsequent to the execution of this Agreement the Interconnector desires to
place in the Premises any equipment or facilities not set forth on Exhibit ___,
the Interconnector shall furnish to SWBT a written list and description thereof
substantially in the form of Attachment A, which is attached and incorporated.
Thereafter, in its sole discretion, SWBT may provide such written consent or may
condition any such consent on additional charges arising from the request,
including any engineering design charges and any additional requirements such as
power and environmental requirements for such listed and described equipment
and/or facilities. Upon the execution by both parties of a final list and
description, including any 

<PAGE>   196

                                     -9-

applicable charges, this Agreement shall be deemed to have been amended to 
include the terms and conditions of the final list and description.

         7.2.2 Limitations. The foregoing imposes no obligation upon SWBT to
purchase additional plant or equipment, relinquish used or forecasted space or
facilities, or to undertake the construction of new quarters or to construct
additions to existing quarters in order to satisfy a subsequent request for
additional space or the placement of additional equipment or facilities.

         7.3 Administrative Uses. The Interconnector may use the Premises for
placement of equipment and facilities only. The Interconnector's employees,
agents and contractors shall be permitted access to the Premises at all
reasonable times, provided that the Interconnector's employees, agents and
contractors comply with SWBT's policies and practices pertaining to fire, safety
and security. The Interconnector agrees to comply promptly with all laws,
ordinances and regulations affecting the use of the Premises. Upon the
expiration of the Agreement, the Interconnector shall surrender the Premises to
SWBT, in the same condition as when first occupied by the Interconnector,
ordinary wear and tear excepted.

         7.4 Threat to Network or Facilities. Interconnector equipment or
operating practices representing a significant demonstrable technical threat to
SWBT's network or facilities, including the Building, are strictly prohibited.

         7.5 Interference or Impairment. Notwithstanding any other provision
hereof, the characteristics and methods of operation of any equipment or
facilities placed in the Premises shall not interfere with or impair service
over any facilities of SWBT or the facilities of any other person or entity
located in the Building; create hazards for or cause damage to those facilities,
the Premises, or the Building; impair the privacy of any communications carried
in, from, or through the Building; or create hazards or cause physical harm to
any individual or the public. Any of the foregoing events would be a material
breach of this Agreement.


<PAGE>   197


                                     -10-

         7.6 Interconnection to Other Collocated Interconnectors Within the
Building. To the extent that SWBT is required by law to permit such
interconnection, SWBT will provide the connection between physical collocation
arrangements on a time and materials basis whenever the collocated
interconnectors cannot for technical reasons provide the connection for
themselves by passing the facility through the cage wall(s). SWBT will provide
nothing more than the labor and physical structure(s) necessary for the
collocator(s) to pull facilities provided by one collocator from its cage to the
cage of another collocator. If the collocators are not located on the same floor
and cannot physically pull the cable themselves through the SWBT provided
structure(s), SWBT will perform the cable pull on an time and materials basis.
At no time will the collocators be allowed access to any portion of the central
office other than the collocation area. SWBT will not make the physical
connection within the collocator's cage, SWBT will not accept any liability for
the cable or the connections and SWBT will not maintain any records concerning
these connections.

         7.7 Personality and its Removal. Subject to this Article, the
Interconnector may place or install in or on the Premises such fixtures and
equipment as it shall deem desirable for the conduct of business. Personal
property, fixtures and equipment placed by the Interconnector in the Premises
shall not become a part of the Premises, even if nailed, screwed or otherwise
fastened to the Premises, but shall retain their status as personality and may
be removed by Interconnector at any time. Any damage caused to the Premises by
the removal of such property shall be promptly repaired by Interconnector at its
expense.

         7.8 Alterations. In no case shall the Interconnector or any person
purporting to be acting through or on behalf of the Interconnector make any
rearrangement, modification, improvement, addition, repair, or other alteration
to the Premises or the Building without the advance written permission and
direction of SWBT. SWBT shall consider a modification, improvement, addition,
repair, or other alteration requested by the Interconnector, provided that SWBT
shall have the right to reject or modify 


<PAGE>   198

                                     -11-


any such request. The cost of any such construction shall be paid by 
Interconnector in accordance with SWBT's then-standard custom work order 
process.

                            ARTICLE VIII - STANDARDS

         8.1 Minimum Standards. This Agreement and the physical collocation
provided hereunder is made available subject to and in accordance with the (i)
Bellcore Network Equipment Building System (NEBS) Generic Requirements
(GR-63-CORE and GR-1089-CORE), as may be amended at any time and from time to
time, and any successor documents; (ii) SWBT's Technical Publication for
Physical Collocation dated ________ ___, 1996, as may be amended from time to
time; (iii) SWBT's Technical Publication 76300, Installation Guide, followed in
installing network equipment and facilities within SWBT central offices, as may
be amended from time to time; (iv) SWBT's Emergency Operating Procedures, as may
be amended from time to time; and (v) any statutory and/or regulatory
requirements in effect at the execution of this Agreement or that subsequently
become effective and then when effective. The Interconnector shall strictly
observe and abide by each.

         8.2 Revisions. Any revision to SWBT's Technical Publication for
Physical Collocation, its Technical Publication 76300, or its Emergency
Operating Procedures shall become effective and thereafter applicable under this
Agreement thirty (30) days after such revision is released by SWBT; provided,
however, that any revision made to address situations potentially harmful to
SWBT's network or the Premises, or to comply with statutory and/or regulatory
requirements shall become effective immediately.

         8.3 Compliance Certification. The Interconnector warrants and
represents compliance with the Bellcore Network Equipment Building System (NEBS)
Generic Requirements (GR-63-CORE and GR-1089-CORE) for each item set forth on
Exhibit ___. The Interconnector also warrants and represents that any equipment
or facilities that may be placed in the Premises pursuant to Section 7.2.1 or
otherwise shall be so compliant. DISCLOSURE OF ANY NON-COMPLIANT ITEM ON 


<PAGE>   199

                                     -12-


EXHIBIT __, PURSUANT TO SECTION 7.2.1, OR OTHERWISE SHALL NOT QUALIFY THIS
ABSOLUTE CERTIFICATION IN ANY MANNER.

               ARTICLE IX - RESPONSIBILITIES OF THE INTERCONNECTOR

         9.1 Contact Number. The Interconnector is responsible for providing to
SWBT personnel a contact number for Interconnector technical personnel who are
readily accessible 24 hours a day, 7 days a week.

         9.2 Trouble Status Reports. The Interconnector is responsible for
providing trouble report status when requested by SWBT.

         9.3 Optical Fiber Extension. The Interconnector is responsible for
bringing its fiber optic cable to the wire center entrance manhole(s) designated
by SWBT, and for leaving sufficient cable length in order for SWBT to fully
extend the Interconnector-provided cable through the cable vault to the
Premises.

         9.4 Regeneration. Regeneration of either DS1 or DS3 signal levels may
be provided by the Interconnector, or SWBT under its then-standard custom work
order process, including payment requirements prior to the installation of the
regeneration equipment.

         9.5 Removal. The Interconnector is responsible for removing any
equipment, property or other items that it brings into the Premises or any other
part of the Building. If the Interconnector fails to remove any equipment,
property, or other items from the Premises within thirty (30) days after
discontinuance of use, SWBT may perform the removal and shall charge the
Interconnector for any materials used in any such removal, and the time spent on
such removal at the then-applicable hourly rate for custom work. Further, in
addition to the other provisions herein, the Interconnector shall indemnify and
hold SWBT harmless from any and all claims, expenses, fees, or other costs
associated with any such removal by SWBT.


<PAGE>   200

                                     -13-


         9.6 Interconnector's Equipment and Facilities. The Interconnector is
solely responsible for the design, engineering, testing, performance, and
maintenance of the equipment and facilities used by the Interconnector in the
Premises. The Interconnector will be responsible for servicing, supplying,
repairing, installing and maintaining the following facilities within the
Premises:

         (a) its fiber optic cable(s);

         (b) its equipment;

         (c) required point of termination cross connects;

         (d) point of termination maintenance, including replacement of fuses
and circuit breaker restoration, if and as required; and

         (e) the connection cable and associated equipment which may be required
within the Premises to the point(s) of termination.

SWBT NEITHER ACCEPTS NOR ASSUMES ANY RESPONSIBILITY WHATSOEVER IN
ANY OF THESE AREAS.

         9.7 Verbal Notifications Required. The Interconnector is responsible
for immediate verbal notification to SWBT of significant outages or operations
problems which could impact or degrade SWBT's network, switches, or services,
and for providing an estimated clearing time for restoral. In addition, written
notification must be provided within twenty-four (24) hours.

         9.8 Service Coordination. The Interconnector is responsible for
coordinating with SWBT to ensure that services are installed in accordance with
the service request.

         9.9 Testing. The Interconnector is responsible for testing, to identify
and clear a trouble when the trouble has been isolated to an
Interconnector-provided facility or piece of equipment. If SWBT testing is also
required, it will be provided at charges specified in SWBT's F.C.C. No. 73,
Section 13.

                           ARTICLE X - QUIET ENJOYMENT

         Subject to the other provisions hereof, SWBT covenants that it has full
right and authority to 

<PAGE>   201

                                     -14-


permit the use of the Premises by the Interconnector and that, so long as the 
Interconnector performs all of its obligations herein, the Interconnector may 
peaceably and quietly enjoy the Premises during the term hereof.

                             ARTICLE XI - ASSIGNMENT

         The Interconnector shall not assign or otherwise transfer this
Agreement, neither in whole nor in part, or permit the use of any part of the
Premises by any other person or entity, without the prior written consent of
SWBT. Any purported assignment or transfer made without such consent shall be
voidable at the option of SWBT. The Interconnector shall not permit any third
party to jointly occupy the Premises.

                         ARTICLE XII - CASUALTY LOSS

         12.1 Damage to Premises. If the Premises are damaged by fire or other
casualty, and
         (i)   The Premises are not rendered untenantable in whole or in part,
               SWBT shall repair the same at its expense (as hereafter limited)
               and the rent shall not be abated, or
         (ii)  The Premises are rendered untenantable in whole or in part and
               such damage or destruction can be repaired within ninety (90)
               days, SWBT has the option to repair the Premises at its expense
               (as hereafter limited) and rent shall be proportionately abated
               while Interconnector was deprived of the use. If the Premises
               cannot be repaired within ninety (90) days, or SWBT opts not to
               rebuild, then this Agreement shall (upon notice to the
               Interconnector within thirty (30) days following such occurrence)
               terminate as of the date of such damage.

Any obligation on the part of SWBT to repair the Premises shall be limited to
repairing, restoring and rebuilding the Premises as originally prepared for the
Interconnector and shall not include any obligation to repair, restore, rebuild
or replace any alterations or improvements made by the

<PAGE>   202

                                     -15-


Interconnector or by SWBT on request of the Interconnector; or any fixture or
other equipment installed in the Premises by the Interconnector or by SWBT on
request of the Interconnector.

         12.2. Damage to Building. In the event that the Building shall be so
damaged by fire or other casualty that closing, demolition or substantial
alteration or reconstruction thereof shall, in SWBT's opinion, be advisable,
then, notwithstanding that the Premises may be unaffected thereby, SWBT, at its
option, may terminate this Agreement by giving the Interconnector ten (10) days
prior written notice within thirty (30) days following the date of such
occurrence, if at all possible.

                             ARTICLE XIII - RE-ENTRY

         If the Interconnector shall default in performance of any agreement
herein, and the default shall continue for thirty (30) days after receipt of
written notice, or if the Interconnector is declared bankrupt or insolvent or
makes an assignment for the benefit of creditors, SWBT may, immediately or at
any time thereafter, without notice or demand, enter and repossess the Premises,
expel the Interconnector and any claiming under the Interconnector, remove the
Interconnector's property, forcibly if necessary, and thereupon this Agreement
shall terminate, without prejudice to any other remedies SWBT might have.

         SWBT may also refuse additional applications for service and/or refuse
to complete any pending orders for additional space or service by the
Interconnector at any time thereafter.

                      ARTICLE XIV - LIMITATION OF LIABILITY

         14.1 Limitation. With respect to any claim or suit for damages arising
in connection with the mistakes, omissions, interruptions, delays or errors, or
defects in transmission occurring in the course of furnishing service hereunder,
the liability of SWBT, if any, shall not exceed an amount equivalent to the
proportionate monthly charge to the Interconnector for the period during which
such mistake, omission, interruption, delay, error, or defect in transmission or
service occurs and continues.


<PAGE>   203

                                     -16-


However, any such mistakes, omissions, interruptions, delays, errors, or defects
in transmission or service which are caused or contributed to by the negligence
or willful act of the Interconnector or which arise in connection with the use
of the Interconnector-provided facilities or equipment shall not result in the
imposition of any liability whatsoever upon SWBT.

         Neither party shall be responsible to the other for any indirect,
special, consequential, lost profit, or punitive damages, whether in contract or
tort.

         Each party shall be indemnified and held harmless by the other against
claims and damages by any third party arising from provision of the other
party's services or equipment except those claims and damages directly
associated with the provision of services to the other party which are governed
by the provisioning party's applicable tariffs.

         Neither party shall have any liability whatsoever to the customers of
the other party for claims arising from the provision of the other party's
service to its customers, including claims for interruption of service, quality
of service or billing disputes.

         The liability of either party for its willful misconduct, if any, is
not limited by this Agreement. With respect to any other claim or suit, by a
customer or by any others, for damages associated with the installation,
provision, preemption, termination, maintenance, repair or restoration of
service, SWBT's liability, if any, shall not exceed an amount equal to the
proportionate monthly charge for the affected period.

         SWBT shall not be liable for any act or omission of any other carrier
or customer providing a portion of a service, nor shall SWBT for its own act or
omission hold liable any other carrier or customer providing a portion of a
service.

         When the Interconnector is provided service under this Agreement, SWBT
shall be indemnified, defended and held harmless by the Interconnector against
any claim, loss or damage arising from the customer's use of services offered
under this Agreement, involving:

         (1) Claims for libel, slander, invasion of privacy, or infringement of
             copyright arising from

<PAGE>   204

                                     -17-


             the customer's own communications;

         (2) Claims for patent infringement arising from the customer's acts
             combining or using the service furnished by SWBT in connection with
             facilities or equipment furnished by the customer; or

         (3) All other claims arising in connection with any act or omission of
             the Interconnector in the course of using services provided
             pursuant to this Agreement.

         14.2 Third Parties. The Interconnector acknowledges and understands
that SWBT may provide space in or access to the Building to other persons or
entities ("Others"), which may include competitors of Interconnectors; that such
space may be close to the Premises, possibly including space adjacent to the
Premises and/or with access to the outside of the Premises; and that the cage
around the Premises is a permeable boundary that will not prevent the Others
from observing or even damaging the Interconnector's equipment and facilities.
In addition to any other applicable limitation, SWBT shall have absolutely no
liability with respect to any action or omission by any Other, regardless of the
degree of culpability of any such Other or SWBT, and regardless of whether any
claimed SWBT liability arises in tort or in contract. The Interconnector shall
save and hold SWBT harmless from any and all costs, expenses, and claims
associated with any such acts or omission by any Other acting for, through, or
as a result of the Interconnector.

                      ARTICLE XV - INDEMNIFICATION OF SWBT

         In addition to any other provision hereof, the Interconnector agrees to
indemnify, defend and save harmless SWBT (including its officers, directors,
employees, and other agents) from any and all claims, liabilities, losses,
damages, fines, penalties, costs, attorney's fees or other expenses of any kind,
arising in connection with Interconnector's use of the Premises, conduct of its
business or any activity, in or about the Premises, performance of any terms of
this Agreement, or any act or omission of the Interconnector (including its
officers, directors, employees, agents, contractors, servants,


<PAGE>   205

                                     -18-


invitees, or licensees). Defense of any claim shall be reasonably satisfactory 
to SWBT.

          ARTICLE XVI - SERVICES, UTILITIES, MAINTENANCE AND FACILITIES

         16.1 Operating Services. SWBT, at its sole cost and expense, shall
maintain for the Building customary building services, utilities (excluding
telephone facilities), including janitor and elevator services, 24 hours a day.
The Interconnector shall be permitted to have a single-line business telephone
service for the Premises subject to applicable SWBT tariffs.

         16.2 Utilities. SWBT will provide negative DC and AC power, back-up
power, heat, air conditioning and other environmental support necessary for the
Interconnector's equipment, in the same manner that it provides such support
items for its own equipment within that wire center.

         16.3 Maintenance. SWBT shall maintain the exterior of the Building and
grounds, and all entrances, stairways, passageways, and exits used by the
Interconnector to access the Premises.

         16.4 Legal Requirements. SWBT agrees to make, at its expense, all
changes and additions to the Premises required by laws, ordinances, orders or
regulations of any municipality, county, state or other public authority
including the furnishing of required sanitary facilities and fire protection
facilities, except fire protection facilities specially required because of the
installation of telephone or electronic equipment and fixtures in the Premises.

            ARTICLE XVII - LIMITATION OF ACTIONS; DISPUTE RESOLUTION

         17.1 Finality of Disputes. No claim arising from this Agreement shall
be brought more than twenty-four (24) months from the date of occurrence which
gives rise to the claim.

         17.2  Alternative  to Litigation.  The parties desire to resolve 
disputes arising in connection with this Agreement without litigation. 
Accordingly, except for action seeking a temporary restraining order or an
injunction related to the purposes of this Agreement, or suit to compel 
compliance with this dispute resolution process, the parties agree to use the
following alternative dispute resolution   

<PAGE>   206

                                     -19-

procedure  as  their  sole  remedy  with  respect  to  any controversy or claim 
arising from or relating to this Agreement.

         17.3 Resolution of Disputes Between Parties. At the written request of
a party, each party will appoint a knowledgeable, responsible representative to
meet and negotiate in good faith to resolve any dispute arising under this
Agreement. The location, form, frequency, duration and conclusion of these
discussions shall be left to the discretion of the representatives. Upon
agreement, the representatives may use other alternative dispute resolution
procedures, such as mediation, to assist in the negotiations. Discussions and
correspondence among the representatives for purposes of settlement, exempt from
discovery and production, shall not be admissible in the arbitration described
below or in any lawsuit without the concurrence of all parties. Documents
identified in or provided with such communications, which are not prepared for
purposes of the negotiations, are not so exempted and, if otherwise admissible,
may be admitted in evidence in the arbitration or lawsuit.

         17.4 Arbitration. If the negotiations do not resolve the dispute within
sixty (60) days of the initial written request, the dispute shall be submitted
to binding arbitration by a single arbitrator pursuant to the Commercial
Arbitration Rules of the American Arbitration Association. A Party may demand
such arbitration in accordance with the procedures set forth in those rules.
Discovery shall be controlled by the arbitrator and shall be permitted only to
the extent set forth in this Section. Each party may submit in writing to the
other party, and the receiving party shall so respond, to a maximum of any
combination of thirty-five (35) (none of which may have subparts) of the
following:

         (a) Interrogatories

         (b) Demands to produce documents

         (c) Requests for admission

Additional discovery may be permitted upon mutual agreement of the parties. The
arbitration hearing shall be commenced within sixty (60) days of the demand for
arbitration.  The arbitration shall be held in  ___________________.   The
arbitrator shall control the scheduling so as to process the matter

<PAGE>   207

                                     -20-

expeditiously. The parties  shall  submit  written  briefs five days before the
hearing. The arbitrator shall rule on the dispute by issuing a written opinion
within  thirty (30) days after the close of  hearings. The  arbitrator  has no
authority to order punitive or consequential damages.  The times  specified in  
this section may be extended upon  mutual agreement of the parties or by the
arbitrator upon a showing of good cause. Judgment upon the award rendered by the
arbitrator may be entered in any court having jurisdiction.

         17.5 Costs. Each party shall bear its own costs of these procedures. A
party seeking discovery shall reimburse the responding party the costs of
production of documents (including search time and reproduction costs). The
parties shall equally split the fees of the arbitration and the arbitrator.

                        ARTICLE XVIII - SUCCESSORS BOUND

         Without limiting Article XI hereof, the conditions and agreements
contained herein shall bind and inure to the benefit of SWBT, the Interconnector
and their respective successors and, except as otherwise provided herein,
assigns.

                       ARTICLE XIX - CONFLICT OF INTEREST

         The Interconnector represents that no employee or agent of SWBT has
been or will be employed, retained, paid a fee, or otherwise has received or
will receive any personal compensation or consideration from the Interconnector,
or any of the Interconnector's employees or agents in connection with the
arranging or negotiation of this Agreement or associated documents.

                       ARTICLE XX - NON-EXCLUSIVE REMEDIES

         No remedy herein conferred upon is intended to be exclusive of any
other remedy in equity, provided by law, or otherwise, but each shall be in
addition to every other such remedy.

<PAGE>   208
                                     -21-

                              ARTICLE XXI - NOTICES

         Except as may be specifically permitted in this Agreement, any notice,
demand, or payment required or desired to be given by one party to the other
shall be in writing and shall be valid and sufficient if dispatched by
registered or certified mail, return receipt requested, postage prepaid, in the
United States mails, or by facsimile transmission; provided, however, that
notices sent by such registered or certified mail shall be effective on the
third business day after mailing and those sent by facsimile transmission shall
only be effective on the date transmitted if such notice is also sent by such
registered or certified mail no later than the next business day after
transmission, all addressed as follows:

If to SWBT:

         Jeffrey Fields
         One Bell Plaza, 525.07
         Dallas, Texas 75202

If to the Interconnector:

         Richard Weinstein
         11111 Dorsett Road
         St. Louis, Missouri 63043

Either party hereto may change its address by written  notice given to the other
party hereto in the manner set forth above.

                       ARTICLE XXII - COMPLIANCE WITH LAWS

         The Interconnector and all persons acting through or on behalf of the
Interconnector shall comply with the provisions of the Fair Labor Standards Act,
the Occupational Safety and Health Act, and all other applicable federal, state,
county, and local laws, ordinances, regulations and codes (including

<PAGE>   209
                                     -22-

identification and procurement of required permits, certificates, approvals and
inspections) in its performance hereunder. The Interconnector further agrees
during the term of this Agreement to comply with all applicable Executive and
Federal regulations as set forth in SW9368, attached as Exhibit ____ and
incorporated herein, as may be modified from time to time.

                         ARTICLE XXIII - OSHA STATEMENT

         The Interconnector, in recognition of SWBT's status as an employer,
agrees to abide by and to undertake the duty of compliance on behalf of SWBT
with all federal, state and local laws, safety and health regulations relating
to the Premises which the Interconnector has assumed the duty to maintain
pursuant to this Agreement, and to indemnify and hold SWBT harmless for any
judgments, citations, fines, or other penalties which are assessed against SWBT
as the result of the Interconnector's failure to comply with any of the
foregoing. SWBT, in its status as an employer, shall comply with all federal,
state and local laws, safety and health standards and regulations with respect
to the structural and those other portions of the Premises which SWBT has agreed
to maintain pursuant hereto.

                            ARTICLE XXIV - INSURANCE

         24.1 Coverage Requirements. The Interconnector shall, at its sole cost
and expense procure, maintain, pay for and keep in force the following insurance
coverage and any additional insurance and/or bonds required by law and
underwritten by insurance companies having a BEST Insurance rating of A+VII or
better, and which is authorized to do business in the jurisdiction in which the
Premises are located. SWBT shall be named as an ADDITIONAL INSURED on general
liability policy.

         (1)  Comprehensive General Liability insurance including
              Products/Completed Operations Liability insurance including the
              Broad Form Comprehensive General Liability endorsement (or its
              equivalent(s)) with a Combined Single limit for Bodily Injury and

<PAGE>   210

                                     -23-

              Property  Damage of $1,000,000. Said coverage shall include
              the contractual, independent contractors products/completed
              operations,  broad form property, personal injury and fire legal 
              liability.

         (2)  If use of an automobile is required or if the Interconnector is
              provided or otherwise allowed parking space by SWBT in connection
              with this Agreement, automobile liability insurance with minimum
              limits of $1 million each accident for Bodily Injury, Death and
              Property Damage combine. Coverage shall extend to all owned, hired
              and non-owned automobiles. The Interconnector hereby waives any
              rights of recovery against SWBT for damage to the Interconnector's
              vehicles while on the grounds of the Building and the
              Interconnector will hold SWBT harmless and indemnify it with
              respect to any such damage or damage to vehicles of the
              Interconnector's employees, contractors, invitees, licensees or
              agents.

         (3)  Workers' Compensation insurance with benefits afforded in
              accordance with the laws of the state in which the space is to be
              provided.

         (4)  Employer's Liability insurance with minimum limits of $100,000 for
              bodily injury by accident, $100,000 for bodily injury by disease
              per employee and $500,000 for bodily injury by disease policy
              aggregate.

         (5)  Umbrella/Excess liability coverage in an amount of $5 million
              excess of coverage specified above.

         (6)  All Risk Property coverage on a full replacement cost basis
              insuring all of the Interconnector's personal property situated on
              or within the Building or the Premises. The Interconnector
              releases SWBT from and waives any and all right of recovery,
              claim, action or cause of action against SWBT, its agents,
              directors, officers, employees, independent contractors, and other
              representatives for any loss or damage that may occur to equipment
              or any other personal property belonging to Interconnector or
              located on or in the space at


<PAGE>   211
                                     -24-

              the instance of the Interconnector by reason of fire or water or
              the elements or any other risks would customarily be included in a
              standard all risk casualty insurance policy covering such
              property, regardless of cause or origin, including negligence of
              SWBT, its agents, directors, officers, employees, independent
              contractors, and other representatives. Property insurance on the
              Interconnector's fixtures and other personal property shall
              contain a waiver of subrogation against SWBT, and any rights of
              the Interconnector against SWBT for damage to the Interconnector's
              fixtures or personal property are hereby waived.

The Interconnector may also elect to purchase business interruption and
contingent business interruption insurance, knowing that SWBT has no liability
for loss of profit or revenues should an interruption of service occur.

         24.2 Coverage Increases. The limits set forth in Section 24.1 may be
increased by SWBT from time to time during the term of occupancy to at least
such minimum limits as shall then be customary in respect of comparable
situations within the existing SWBT buildings.

         24.3 Primary Coverage. All policies purchased by the Interconnector
shall be deemed to be primary and not contributing to or in excess of any
similar coverage purchased by SWBT.

         24.4 Effective Date. All insurance must be in effect on or before
occupancy date and shall remain in force as long as any of the Interconnector's
facilities or equipment remain within the Premises or the Building. If the
Interconnector fails to maintain the coverage, SWBT may pay the premiums thereon
and, if so, shall be reimbursed by the Interconnector.

         24.5 Supporting Documentation. The Interconnector shall submit
certificates of insurance and copies of policies reflecting the coverages
specified above prior to the commencement of the work called for in this
Agreement. The Interconnector shall arrange for SWBT to receive thirty (30) days
advance written notice from the Interconnector's insurance company(ies) of
cancellation, non-renewal or substantial alteration of its terms.

<PAGE>   212
                                     -25-

         24.6 Carrier Recommendations. The Interconnector must also conform to
the recommendation(s) made by SWBT's Property Insurance Company which
Interconnector has already agreed to or to such recommendations as it shall
hereafter agree to.

         24.7 Material Breach. Failure to comply with the provisions of this
section will be deemed a material violation of this Agreement.

                      ARTICLE XXV - SWBT'S RIGHT OF ACCESS

         SWBT, its agents, employees, and other SWBT-authorized persons shall
have the right to enter the Premises at any reasonable time to examine its
condition, make repairs required to be made by SWBT hereunder, and for any other
purpose deemed reasonable by SWBT. SWBT may access the Premises for purpose of
averting any threat of harm imposed by the Interconnector or its equipment or
facilities upon the operation of SWBT equipment, facilities and/or personnel
located outside of the Premises. If routine inspections are required, they shall
be conducted at a mutually agreeable time.

                ARTICLE XXVI - PURPOSE AND SCOPE OF AGREEMENT

         Through this Agreement, the Interconnector is placing
telecommunications equipment and facilities on SWBT property for the purpose of
connecting with SWBT's network only. The parties agree that this Agreement does
not constitute, and shall not be asserted to constitute, an admission or waiver
or precedent with any State commission, the Federal Communications Commission,
any other regulatory body, any State or Federal Court, or in any other form that
SWBT has agreed or acquiesced that any piece of Interconnector equipment or
facility is "equipment necessary for interconnection or access to unbundled
network elements" under 47 U.S.C. 251(c)(6).

                          ARTICLE XXVII - MISCELLANEOUS

         27.1 Exhibits    The following Exhibits are attached hereto and made 
part hereof:               
                          Exhibit ____________


<PAGE>   213
                                     -26-

                          Exhibit ____________
                          Exhibit ____________
                          Exhibit ____________

         27.2 Variations. In the event of variation or discrepancy between any
duplicate originals hereof, including exhibits, the original Agreement held by
SWBT shall control.

         27.3 Governing Law. This Agreement shall be governed by the laws of the
State in which the Premises are located, without regard to the choice of law
principles thereof.

         27.4 Joint and Several. If Interconnector constitutes more than one
person, partnership, corporation, or other legal entities, the obligation of all
such entities under this Agreement is joint and several.

         27.5 Future Negotiations. SWBT may refuse requests for additional space
in the Building or in any other SWBT premises if the Interconnector is in
material breach of this Agreement, including having any past due charges
hereunder. In any and each such event, the Interconnector hereby releases and
shall hold SWBT harmless under Article XV from any duty to negotiate with the
Interconnector or any of its affiliates for any additional space or physical
collocation.

         27.6 Severability. With the exception of the requirements, obligations,
and rights set forth in Article II hereof, if any of the provisions hereof are
otherwise deemed invalid, such invalidity shall not invalidate the entire
Agreement, but rather the entire Agreement shall be construed as if not
containing the particular invalid provision(s), and the rights and obligations
of SWBT and the Interconnector shall be construed accordingly.

         27.7 Paragraph Headings and Article Numbers. The headings of the
articles and paragraphs herein are inserted for convenience only and are not
intended to affect the meaning or interpretation of this Agreement.

         27.8 Entire Agreement. This Agreement with the attached schedules and
exhibits, and referenced documentation and materials attached hereto set forth
the entire understanding of the parties and 

<PAGE>   214
                                     -27-

supersedes all prior agreements, arrangements and understandings relating to
this subject matter and may not be changed except in writing by the parties;
provided, however, that this provision shall not affect current or pending
tariffs, under investigation or otherwise, including any charges due thereunder.
No representation, promise, inducement or statement of intention has been made
by either party which is not embodied herein, and there are no other oral or
written understandings or agreements between the parties relating to the subject
matter hereof except as may be referenced herein.

         27.9 No Third Party Beneficiaries. Nothing in this Agreement is
intended, nor shall be deemed, to confer any rights or remedies upon any person
or legal entity not a party hereto.

         27.10 Construction. This Agreement shall be interpreted and governed
without regard to which party drafted this Agreement. 

         27.11 Multiple Originals. This Agreement may be executed in multiple 
copies, each of which shall be deemed an original.

         27.12 Wavier of Obligations. (a) Whenever this Agreement requires the 
consent of a party, any request for such consent shall be in writing.

         (b) Neither party shall be deemed to have waived or impaired any right,
authority, or option reserved by this Agreement (including the right to demand
exact compliance with every term, condition and covenant herein, or to declare
any breach hereof to be a default and to terminate this Agreement prior to the
expiration of its term), by virtue of any custom or practice of the parties at
variance with the terms hereof or any failure, refusal or neglect to exercise
any right under this Agreement or to insist upon exact compliance by the other
with its obligations hereunder, including any rule or procedure, or any waiver,
forbearance, delay, failure or omission by SWBT to exercise any right, power or
option, whether of the same, similar or different nature, with respect to one or
more other interconnectors.

         27.13 Rights Cumulative. The rights of a party hereunder are cumulative
and no exercise or 

<PAGE>   215
                                     -28-

enforcement by such party of any right or remedy hereunder shall preclude the 
exercise or enforcement of any other right or remedy hereunder or to which such 
party is entitled to enforce.

         27.14 Binding Effect. (a) This Agreement is binding upon the parties
hereto, their respective executors, administrators, heirs, assigns and
successors in interest.

<PAGE>   216
                                     -29-

         (b) All obligations by either party which expressly or by their nature
survive the expiration or termination of this Agreement shall continue in full
force and effect subsequent to and notwithstanding its expiration or termination
and until they are satisfied in full or by their nature.

         27.15 Impossibility of Performance. Neither party shall be liable for
loss or damage or deemed to be in breach of this Agreement if its failure to
perform its obligations results from: (a) compliance with any law, ruling,
order, regulation, requirement or instruction of any federal, state or municipal
government or any department or agency thereof or court of competent
jurisdiction; (b) acts of God; (c) acts of omissions of the other party; (d)
fires, strikes, labor difficulties, embargoes, war, insurrection or riot; or any
other intervening act beyond the reasonable control of the party claiming such a
delay. Any delay resulting from any of said causes shall extend performance
accordingly or excuse performance, in whole or in part, as may be reasonable. In
any such event, the Interconnector's employees, authorized agents and
contractors will comply with the Emergency Operating Procedures established by
SWBT.

         27.16 Survival. The terms, provisions, representations, and warranties
contained in this Agreement that by their nature and/or context are intended to
survive the performance thereof by either or both parties hereunder shall so
survive the completion of performances and termination of this Agreement,
including the making of any and all payments due hereunder.

         IN WITNESS WHEREOF, the duly authorized representatives of the parties
have executed and delivered this Agreement as of the day and year first above
written.


<PAGE>   217
                                     -30-

            THIS AGREEMENT CONTAINS A BINDING ARBITRATION AGREEMENT.

SOUTHWESTERN BELL TELEPHONE COMPANY


By: ________________________________

Title: _____________________________


DIGITAL TELEPORT, INC. (MISSOURI)


By: _________________________________

Title: ______________________________


<PAGE>   218
                                     -31-

                                  ATTACHMENT A



Southwestern Bell Telephone Company
[ADDRESS AND TO THE ATTENTION OF PER NOTICE PROVISION]

Re:  [REFERENCE IDENTIFIER ON COVER SHEET]

         Pursuant to the referenced Physical Collocation Agreement
("Agreement"), this letter constitutes a request to place the following
additional equipment and/or facilities in the Premises:

         Generic Name    # of Bays    Floor Loading    Power Req. Heat Release
         ------------    ---------    -------------    ---------- ------------

         If this request is acceptable to Southwestern Bell Telephone Company
("SWBT"), please indicate that acceptance by executing both originals and
returning one to the undersigned. With the return of an executed original, the
Agreement shall be deemed amended to reflect that the listed equipment and
facilities may be located in the Premises. In all other respects, the Agreement
shall be unaffected.

         If not acceptable, please let me know of SWBT's objections or
conditions to its acceptance.

         All capitalized terms not defined in this letter but defined in the
Agreement shall have the meaning ascribed to such term in the Agreement.


                                     DIGITAL TELEPORT, INC. (MISSOURI)


                                     By: _________________________

                                     Title: ______________________

                                     Name: _______________________


AGREED AND ACCEPTED:

SOUTHWESTERN BELL TELEPHONE
   COMPANY


By: _______________________

Title: ____________________

Name:  ____________________

Date: _____________________

<PAGE>   219
                                                                    APPENDIX SS7
                                                                    Page 2 of 12

                                  APPENDIX SS7


                          APPENDIX FOR THE PROVISION OF
                                   SS7 SERVICE

This Appendix sets forth the terms and conditions under which SWBT shall provide
to LSP certain Common Channel Signaling/Signaling System 7 (CCS/SS7) services,
herein referred to as "SS7 Service".

This Appendix provides for the use of the SWBT Common Channel Signaling network,
which uses the Signaling System 7 (SS7) protocol, and for a Dedicated Signaling
Link, which provides network interconnection to SWBT's Signal Transfer Point
(STPs), including facilities. SS7 Service provides CCS/SS7 functionality and
translations to support SS7 based services and applications as they become
available and as facilities permit.

SS7 Service includes the screening of messages based on origination signaling
point code and the routing of messages by a SWBT mated pair of STPs. Any
services beyond SS7 Transport, Use of the STP or a Dedicated Signaling Link
interconnection (e.g. Local and IntraLATA Call Set-Up Signaling, Interexchange
Carrier (IXC) Call Set-Up Signaling, Easy OptionsSM, 800 Data Base Access, and
Line Information Data Base (LIDB) Validation Service Access) will be provided by
an amendment to this appendix, by a separate agreement, or by tariff, whichever
is applicable. Arrangements for services should be made through the LSP Service
Center of SWBT.


I.       SERVICE DESCRIPTION

         A.      SS7 TRANSPORT

                 SS7 Transport provides for the routing and screening of SS7
                 messages from a SWBT pair of STPs (i.e. a mated pair) to
                 another SWBT pair of STPs. The screening of messages provides
                 for LSP designation of signaling points associated with the
                 LSP and controls which messages may be allowed or not allowed
                 by the SWBT STP pairs. The routing of messages provides for
                 the transfer of a complete message between signaling links,
                 and for a Global Title Translation of the message address, if
                 needed.

                 SS7 Transport provides routing of messages for all parts of the
                 SS7 protocol including, for example, Message Transfer Part
                 (MTP) messages, Integrated Services Digital Network User Part
                 (ISDNUP or ISUP) messages, Signaling Connection and Control
                 Part (SCCP) messages, Transaction Capability 

<PAGE>   220
                                                                    APPENDIX SS7
                                                                    Page 3 of 12

                 Application Part (TCAP) messages and Operations and 
                 Maintenance Application Part (OMAP) messages.

                 SS7 Transport provides for screening and routing of signaling
                 messages based on the SS7 protocol. These messages may support
                 other applications and services such as, for example, Easy
                 Option[ICON] (referred to as Call Control Option[ICON]
                 or Bellcore CLASS[ICON]) services, Message Waiting services,
                 Toll Free Database services, Line Information Data Base (LIDB)
                 Services, Calling Name (CNAM) Database services, Advanced
                 Intelligent Network (AIN) services and Telecommunications
                 Industry Association Interim Standard-41 (IS-41) services. SS7
                 Transport will route messages to the global title address or
                 to the signaling point code address of the message based on
                 the translation information of SWBT's STP.

                 SS7 Transport provides screening and routing of messages that
                 are generated by the action of the LSP signaling point, or
                 messages that are generated by a signaling point connected via
                 the LSP signaling point.

         B.      DEDICATED SIGNALING LINKS

                 Dedicated Signaling Links provide physical access to SWBT's
                 signaling network. The links are fully dedicated to the use of
                 LSP and provide the screening and routing usage for the SWBT
                 STP to which the link is connected. Dedicated signaling links
                 are provided as a set of links connecting to a SWBT mated pair
                 of STPs. Dedicated Signaling Links are dedicated two-way
                 digital data circuits that interconnect SWBT's STP locations
                 and the LSP's Signaling Points at Signaling Point of Interface
                 (SPOI) locations. Dedicated Signaling Links are available to
                 LSPs for their use in furnishing SS7-based services or
                 applications to their end users or other users of SS7 signaling
                 information.

                 Dedicated Signaling Links include the following elements:

           1.    SS7 Link Cross Connect: The SS7 Link Cross Connect provides a
                 DS-0A or DS1 connection and access point for testing in the 
                 SWBT STP building. The cross connect connects the STP Port 
                 Termination to an LSP unbundled dedicated transport or to a 
                 collocation cage.

           2.    STP Port Termination: The STP Port Termination is the physical
                 termination of the signaling link (i.e. 56 kbps circuit) at a
                 SWBT STP. An STP Port Termination is used for each 56 kbps SS7
                 Link Cross Connect terminated at a SWBT STP.

                 The STP Port Termination shall provide for the use of the SWBT
                 STP to which the port is connected.

<PAGE>   221
                                                                    APPENDIX SS7
                                                                    Page 4 of 12

                 The LSP shall provide the portion of the signaling link from
                 the LSP premises within the LATA to the SWBT STP location using
                 unbundled dedicated transport. LSP shall notify SWBT that the
                 facility contains a signaling link service. Multiple facilities
                 provided by SWBT will be identified so that SWBT may maintain
                 facility diversity between links and linksets that require
                 diversity. LSP shall identify the DS1 or channel of a DS1 that
                 will be used for the signaling link.

                 If LSP does not use an unbundled dedicated transport facility
                 to LSP premises, LSP shall identify that the SS7 Link Cross
                 Connect shall connect to a LSP collocation cage in the SWBT STP
                 building.

                 When LSP uses an alternative DS1 facility or arranges, or
                 agrees to allow, a physical degree of diversity or performance
                 that is not in accordance with the specifications of Bellcore,
                 GR-905-CORE, LSP acknowledges that the performance and
                 reliability of the SS7 protocol may be affected and the
                 performance and reliability standards described in GR-905-CORE
                 may be disqualified.

                 Dedicated Signaling Links are subject to SWBT compatibility
                 testing and certification requirements per the Network
                 Operations Forum Reference Document, per Bellcore, GR-905-CORE
                 and per SWBT Technical Publication, TP76638. First
                 interconnections to the SWBT signaling network per LSP and per
                 signaling point type of equipment will require pre-ordering
                 meetings to exchange information and schedule testing for
                 certification by SWBT.

         C.      USE OF THE STP

                 The Use of the STP provides for the use of the SWBT SS7
                 signaling network when LSP uses the SWBT Local Switching
                 Unbundled Network Element. The Use of the STP provides for the
                 use of the signaling link between the SWBT local switch and
                 the STP, the use of the signaling link and ports between the
                 SWBT tandem switch and the STP when applicable, the use of the
                 SWBT STP port and use of STP Transport. The Use of the STP is
                 a signaling network element incurred by use of the SWBT local
                 switching (i.e. Unbundled Local Switching). The Use of the STP
                 provides the SWBT signaling when LSP subscribers originate and
                 terminate calls from a SWBT SS7 equipped end office.


II.      DEFINITIONS

         Attachment 1, which is attached hereto and made a part hereof, contains
         DEFINITIONS OF TERMS in this Appendix.
<PAGE>   222
                                                                    APPENDIX SS7
                                                                    Page 5 of 12


III.     MANNER OF PROVISIONING

         A.      SS7 TRANSPORT

                 LSP shall use SS7 Transport subject to the screening and
                 routing information of the SWBT STPs. SWBT shall provide
                 information to LSP on the routes and signaling point codes
                 served by the SWBT STPs.

                 SS7 Transport shall route ISUP messages for the purpose of
                 establishing trunk voice paths between switching machines.
                 Routes requiring ISUP routes longer than two SWBT STP pairs may
                 be provisioned pursuant to Attachment Network Element Bona Fide
                 Request per specific LSP request, if such route is technically
                 feasible. However, routes involving signaling point codes not
                 associated with LSP are subject to the route designated by the
                 owner of the SPC.

                 SS7 Transport shall route TCAP queries when feasible per the
                 SS7 Protocol to the SWBT "regional" STP pair that directly
                 serves the database of TCAP message. SS7 Transport shall route
                 TCAP responses from a SWBT "regional" STP pair to another SWBT
                 STP pair.

                 When LSP requires modification of SWBT's SS7 Service components
                 not otherwise provided in this contract, the modifications may
                 be furnished pursuant to Attachment Network Element Bona Fide
                 Request.

                 SS7 Transport provides a signaling route for messages only to
                 signaling points to which SWBT has a route. SS7 Transport does
                 not include the provision of a signaling route to every
                 possible signaling point. When SWBT does establish a route to a
                 signaling point in a mated pair of STPs, the route may not be
                 available to other SWBT pairs of STPs, until ordered. When SWBT
                 or LSP, pursuant to a service order, arranges to establish a
                 route to a signaling point, such route to the other signaling
                 point or other signaling network will be used by all signaling
                 points within and connected to the SWBT signaling network per
                 the standard requirements of the SS7 protocol.

                 Disputes concerning the association of a signaling point among
                 specific link sets associated with a SWBT mated STP will be
                 resolved by consultation with the signaling point owner, as
                 defined in the Local Exchange Routing Guide (LERG), Section 1,
                 assignment of Signaling Point Codes.

         B.      DEDICATED SIGNALING LINKS

                 LSP shall designate the signaling points and signaling point
                 codes associated with LSP. LSP shall provide information to
                 SWBT to allow SWBT to translate 

<PAGE>   223
                                                                    APPENDIX SS7
                                                                    Page 6 of 12


                 SWBT STPs. The information shall define the screening
                 and routing information for the signaling point codes of LSP.
                 This information may include global title address, translation
                 type and subsystem designations as needed.

             Signaling links from SWBT mated pairs of STPs shall connect to LSP
             premises (including collocation locations) within the same LATA. A
             set of links can be either:

             1.   "A" Link Sets from LSP's Signaling Point (SP)/Service 
                  Switching Point (SSP).  A minimum of two links will be 
                  required, one from the SP/SSP to each STP; or,

             2.   "B" Link Sets from LSP's STPs that are connected to SWBT's
                  mated pair of STPs. A minimum of four links will be required
                  (i.e., a "quad") between the two pairs of STPs. (This same
                  arrangement is sometimes referred to as a set of "D" links.)

             An STP Port Termination and SS7 Link Cross Connect is required for
             each 56 kbps access link utilized for the Service. STP locations
             are set forth in the National Exchange Carrier Association, Inc.
             (NECA) Tariff F.C.C. No. 4.

             A pre-order meeting will define the SWBT facility availability and
             the degree of diversity in both the SWBT physical network and the
             LSP physical network from signaling point to signaling point for
             the link.

             All applicable signaling point codes for each signaling link must
             be installed at each of SWBT's interconnecting STPs.

             Call set-up times may be adversely affected when LSP, using SS7
             signaling, employs Intermediate Access Tandems (IATs) in its
             network. SWBT makes no warranties with respect to call set-up times
             when multiple STP pairs are involved or when the signaling traffic
             is exchanged between two non-SWBT signaling points.

             Provisioning of the SS7 Service is in accordance with SWBT CCS/SS7
             Network Interface Specifications (TP76638) and Bellcore Common
             Channel Network Interface Specification
             (GR-905-CORE), as amended.

             When LSP uses the Dedicated Signaling Links of another party and
             LSP submits an order for SWBT to change the routing or screening
             information associated with the other party's signaling links, LSP
             shall include with the order a Letter of Authorization (LOA). The
             LOA shall be from the other party (i.e. the owner of the set of
             links) and shall indicate that the other party shall agree to pay
             SWBT charges to change the translations associated with the link
             set and shall agree to pay SWBT charges associated with SS7
             Transport.

<PAGE>   224
                                                                    APPENDIX SS7
                                                                    Page 7 of 12

         C.       USE OF THE STP

                  When LSP orders SWBT Unbundled Local Switching the Use of the
                  STP shall apply. No order nor provisioning by LSP is needed.
                  The SWBT Local Switch will use the SWBT SS7 signaling network.

                  Any changes, additions or deletions to the SWBT SS7 signaling
                  network required per LSP shall be submitted pursuant to
                  Attachment Network Element Bona Fide Request.

IV.      DESCRIPTION OF RATE ELEMENTS

         The following rate elements apply to SS7 Service:

         A.      SS7 TRANSPORT

                 SS7 Transport shall be measured per octet of information
                 screened and routed.

                 LSP shall pay SS7 Transport Per Octet rate element for the
                 screening and routing of messages by each additional SWBT STP
                 pair. A usage rate applies per octet generated by action of
                 LSP.

         B.      DEDICATED SIGNALING LINKS

                 1.        SS7 Link Cross Connect

                           LSP shall pay the DS-0 or DS-1 rate for the SS7 Link
                           Cross Connect at the STP location for each Dedicated
                           Signaling Link. Rates are per DS-0 and DS-1 bandwidth
                           and per connection to unbundled dedicated facility or
                           connection to a collocation cage. Rates are per month
                           and nonrecurring installation per first or additional
                           cross connects ordered per order.

                 2.        STP Port Termination

                           LSP shall pay the STP Port Termination rate element
                           for each termination of the SS7 Link Cross Connect at
                           the SWBT STP. One STP Port Termination must be
                           installed at SWBT's interconnecting STP for each
                           Dedicated Signaling Link.

                           There are two charges that apply to the STP Port
                           Termination, i.e., a fixed recurring monthly rate per
                           port termination and a nonrecurring installation
                           charge per port.
<PAGE>   225
                                                                    APPENDIX SS7
                                                                    Page 8 of 12

         C.       SIGNALING POINT CODE ADDITION

                  LSP shall pay the Signaling Point Code Addition rate element
                  for the establishment and translation of each applicable CCS
                  network signaling point code at a SWBT STP. LSP shall pay a
                  nonrecurring charge per Signaling Point Code established at
                  each STP.

         D.       GLOBAL TITLE TRANSLATION (GTT) ADDITION

                  LSP shall pay the GTT Addition rate element for the 
                  establishment of LSP's global title address, translation type
                  or subsystem information in the SWBT STP translations. LSP 
                  shall pay a nonrecurring charge per GTT established at each 
                  STP.

         E.       SERVICE REARRANGEMENT

                  LSP shall pay charges for rearrangement of the SS7 Service
                  which are not specifically addressed pursuant to the Network
                  Element Bona Fide Request process.

         F.       USE OF THE STP PER CALL

                  LSP shall pay the Use of the STP Per Call rate element
                  for  Use of the SWBT STP. The rate shall apply for each call 
                  originated by LSP subscribers using the SWBT Local Switch 
                  Unbundled Network Element. The rate is based on an assumed
                  mean quantity of 200 octets of signaling used for each
                  originated call times the STP Transport rate element.

                  The Use of the STP Per Call is a surrogate for STP Transport
                  and Dedicated Signaling Links when LSP uses the SWBT Unbundled
                  Local Switching Network Element.
<PAGE>   226
                                                                    APPENDIX SS7
                                                                    Page 9 of 12


V.       RATES AND CHARGES

         Rates and Charges for the elements described above are as follows:

<TABLE>
<CAPTION>
                                                                Monthly                               Nonrecurring
          SS7 Links - Cross Connects              Zone A           Zone B           Zone C         Initial Additional
          --------------------------              ------           ------           ------         ------- ----------
<S>                                               <C>              <C>              <C>            <C>        <C>    
          STP to Collocators Cage - DS0           $74.20           $74.20           $74.20         $299.00    $202.45
          STP to Collocators Cage- DS1            $53.65           $53.65           $53.65         $257.00    $174.45
          STP to SWBT MDF - DS0                   $74.20           $74.20           $74.20         $299.00    $202.45
          STP to SWBT DSX Frame-DS1               $53.65           $53.65           $53.65         $257.00    $174.45
</TABLE>

<TABLE>
<CAPTION>
          SS7 Links
          ---------
<S>                                             <C>
          STP Access Connection - 1.544 Mbps     See Dedicated
                                                 Transport
          STP Access Link - 56 Kbps                   $100.16 fixed +
                                                        $0.91 per mile
</TABLE>


<TABLE>
<CAPTION>
          SS7 Signalling
          --------------
<S>                                           <C>                                                 <C>           <C>
          SS7 Signalling                       $0.0003800 per call
          STP Port                                $774.85 per port                                  $286.60        ---
          STP Trunk Signalling                 $0.0000019 per octet
          Point Code Addition                        N/A per point code                              $15.10        ---
          Global Title Translation Addition          ICB                                               ICB         ICB
</TABLE>


VI.      ORDERING THE SERVICE

         LSP shall abide by the following ordering guidelines:

         A.       SS7 TRANSPORT

                  LSP shall submit SWBT's CCS/SS7 Activity Notification Form,
                  identify the set of links the LSP will use and identify the
                  service(s) associated with each SPC. LSP shall identify
                  Signaling Point Code and Global Title Translation information
                  that must be translated into the SWBT STPs.

         B.       DEDICATED SIGNALING LINKS

                  LSP shall submit an Access Service Request form and SWBT's CCS
                  Activity Notification form. LSP shall identify the SWBT STPs,
                  the LSP premises, the circuit interconnection arrangement at
                  the LSP Dedicated Transport location and the LSP signaling
                  point. LSP shall identify Signaling Point Code and Global
                  Title Translation information that must be translated in the
                  SWBT STPs.

         C.       SIGNALING POINT CODE ADDITION

                  LSP shall submit a SWBT CCS Activity Notification form. LSP
                  shall identify the SWBT STPs and the LSP signaling point code
                  information that must be added or changed in the SWBT STP
                  translations. If more than one pair of SWBT STPs are affected,
                  LSP shall indicate translation route information.
<PAGE>   227
                                                                    APPENDIX SS7
                                                                   Page 10 of 12

         D.       GLOBAL TITLE TRANSLATION (GTT) ADDITION

                  LSP shall submit a SWBT CCS Activity Notification form. LSP
                  shall identify the SWBT Global Title Translation information
                  that must be added, deleted or changed in the SWBT STP
                  translations. If more than one pair of SWBT STPs are affected,
                  LSP shall indicate translation route information.

         E.       SERVICE REARRANGEMENT

                  LSP shall order a SS7 Signaling Service Rearrangement per
                  Attachment Network Element Bona Fide Request.

         F.       USE OF THE STP

                  Ordering requirements for the Use of the STP are included in
                  the requirements set forth in the ordering clause of the Local
                  Switching UNE (Attachment Switching), and are incorporated
                  here by reference.

VII.     RESPONSIBILITIES OF SWBT

         A.       SWBT shall manage the network and, at its sole discretion,
                  apply protective controls. Protective controls include actions
                  taken to control or minimize the effect of network failures or
                  occurrences, which include, but are not limited to, failure or
                  overload of SWBT or LSP facilities, natural disasters, mass
                  calling or national security demands.

         B.       SWBT shall determine the GTT and Translation Type (TT) route
                  for messages routed to GTT which are associated with SWBT
                  signaling points.

         C.       SWBT shall define regional functions and local functions of
                  its STPs. SWBT will route ISUP messages within the SWBT
                  signaling network subject to technical feasibility. Capacity
                  limitations shall define a temporary technical infeasibility
                  until the capacity limit can be resolved.

         D.       SWBT shall meet service performance standards as outlined in
                  GR-905-CORE and TP76638 except as otherwise provided herein.

         E.       In the event that SWBT provides under this contract special
                  service arrangements associated with diversity or other
                  arrangements that do not strictly adhere to GR-905-CORE and
                  TP76638 and are of non-compliance to the technical
                  publications or not certified by SWBT, LSP acknowledges that
                  the service performance standards need not be met in the
                  provision of the total service.
<PAGE>   228
                                                                    APPENDIX SS7
                                                                   Page 11 of 12

         F.       SWBT shall route messages generated by the action of LSP
                  throughout the SWBT signaling network. The content of the
                  messages is for the use of signaling points of origination and
                  destination. SWBT will not use any information within messages
                  for any purpose not required by or related to the use of the
                  SWBT signaling network. SWBT will not divulge any message or
                  any part of messages generated by LSP to any other party,
                  except as required to manage the SWBT signaling network or as
                  may be required by law.

        G.        SWBT shall determine the monthly charges and issue an invoice
                  to the billing address of LSP for the respective service(s)
                  requested by LSP and provided by SWBT. The invoice will
                  identify nonrecurring charges, recurring charges, and other
                  charges and credits, as they apply.

        H.        SWBT shall work cooperatively and provide knowledgeable
                  personnel to meet with LSP in order to provision, test and
                  install the SS7 Service in a timely fashion.

VIII.    RESPONSIBILITIES OF LSP

        A.        LSP shall provision the signaling links at the LSP premises
                  and from the LSP premises to the SWBT STP location in a
                  diverse, reliable and technically acceptable manner to comply
                  with the standard SS7 protocol, Bellcore GR-905-CORE and the
                  SWBT network.

        B.        If LSP requires a greater degree of diversity than SWBT
                  provides in the existing network, a special facility or a
                  special routing of services, LSP agrees to initiate a
                  Wholesale Construction request and pay additional charges as
                  SWBT may reasonably determine.

        C.        LSP shall identify to SWBT the SPC(s) associated with the LSP
                  set of links.

        D.        When LSP orders the use of the SWBT STP, LSP shall specify the
                  set of signaling links to be used. If the links are provided
                  to another party LSP shall warrant to SWBT that the other
                  party is aware of the charges associated with the use of the
                  STP and that the other party will pay the monthly charges for
                  the use of the SWBT STP.

        E.        LSP shall identify to SWBT the Global Title and Translation
                  Type information for messages that route to LSP.

        F.        When routing messages addressed to a SWBT Subsystem Number
                  (SSN), LSP shall use the SWBT defined SSN designation of the
                  SWBT mated STP pair to which the message is routed.
<PAGE>   229
                                                                    APPENDIX SS7
                                                                   Page 12 of 12

        G.        LSP shall transfer Calling Party Number Parameter information
                  unchanged, including the "privacy indicator" information, when
                  ISUP Initial Address Messages are interchanged with the SWBT
                  signaling network.

        H.        LSP shall verify the accuracy of information concerning the  
                  services ordered by LSP.

        I.        LSP shall designate the level of diversity associated with the
                  LSP premises. SWBT shall provide the same degree of diversity
                  as LSP provides.

        J.        LSP shall work cooperatively and provide knowledgeable
                  personnel to meet with SWBT in order to provision, test and
                  install the SS7 Service in a timely fashion.

        K.        LSP shall furnish to SWBT, at the time the SS7 Service is
                  ordered and annually thereafter, an updated three year
                  forecast of usage of the SS7 Signaling network. The forecast
                  shall include total annual volume and busy hour busy month
                  volume. SWBT shall utilize the forecast in its own efforts to
                  project further facility requirements.

        L.        LSP shall inform SWBT in writing thirty (30) days in advance
                  of any change in LSP's use of such SS7 Service which alters by
                  ten percent for any thirty (30) day period the volume of
                  signaling transactions by individual SS7 service that are
                  planned by LSP to be forwarded to SWBT's network. LSP shall
                  provide in said notice the reason, by individual SS7 service,
                  for the volume change.

<PAGE>   230
                                                                    Attachment 1
                                                                    Appendix SS7
                                                                     Page 1 of 2

                                  ATTACHMENT 1

                              DEFINITIONS OF TERMS

Common Channel Signaling (CCS)

A high-speed specialized packet switched communications network that is separate
(out-of-band) from the public packet switched and message networks. CCS carries
addressed signaling messages for individual trunk circuits and/or database
related services between Signaling Points (SS7 nodes) in the CCS network.

Compatibility Testing

Testing performed by representatives from SWBT and LSP to determine proper
interconnection of CCS network facilities for accurate transmission of system
signals and messages. This is often referred to as TR-905 Compatibility Testing.

Octet

8-bits of binary information.

Service Control Point (SCP)

A node in the CCS network that provides a database functionality.

Service Switching Point (SSP)

A signaling point that can launch queries to databases and receive/interpret
responses used to provide specific end user services.

Signal Transfer Point (STP)

A packet switch in the CCS network that is used to route SS7 protocol signaling
messages between signaling nodes. An STP provides screening and routing of SS7
messages. STPs transfer signaling messages to other networks. SWBT's signaling
network includes mated pairs of local and regional STPs.

Signaling Link

An end-to-end high-capacity digital, data quality, link operating at 56 kilobits
per second that transmits signaling information in the form of signaling
messages from one network SS7 node to another node in a CCS network. The Link
Type identifies the functionality of the signaling link sets. Signaling links
provide physical interconnection between signaling points of another party and
SWBT STPs.
<PAGE>   231
                                                                    Attachment 1
                                                                    Appendix SS7
                                                                     Page 2 of 2

Signaling Point (SP)

A node in the CCS network that originates and/or receives signaling messages, or
transfers signaling messages from one signaling link to another, or both.

Signaling Point Code (SPC)

An identifier code that identifies a signaling point in the CCS network. The
signaling point code provides an address within the CCS network which enables
messages to be routed to signaling points. Signaling Point Codes are 24 bit
binary numbers comprised of three segments: the Network Identification, the
Network Cluster, and the Member number within the cluster. Signaling Point Codes
are represented digitally as AAA-AAA-AAA, where "AAA" represents a decimal
number from 000 to 255.

Signaling Point of Interface (SPOI)

Mutually agreed point at which SWBT hands off signaling information to LSP.

Signaling System 7 (SS7)

See SS7 Protocol

Signaling System 7 (SS7) Protocol

The signaling protocol, Version 7, used by the nodes of the CCS network. The SS7
protocol used by SWBT is the American National Standards Institute (ANSI)
standard protocol defined by Bellcore Generic Requirement, GR-246-CORE, defined
by Bellcore requirements (GR-317-CORE, GR-394-CORE, GR-444-Core, GR-606-CORE,
GR-82-CORE, GR-905-CORE and various other documents) and defined by the SWBT
Technical Publication TP76638.


<PAGE>   232

                                                              APPENDIX RECORDING


                               APPENDIX RECORDING

                        RECORDING, MESSAGE PROCESSING AND
                 PROVISION OF INTEREXCHANGE CARRIER TRANSPORTED
                             MESSAGE DETAIL APPENDIX


This Appendix sets forth the terms and conditions under which SWBT will provide
recording, message processing and message detail services as described in total
in Exhibit I, SERVICES AND ASSOCIATED CHARGES, and those services specifically
selected by LSP as described in Exhibit II, SELECTED SERVICE OPTIONS AND METHOD
OF PROVISION and at the rates set forth in Exhibit III, BASIS OF COMPENSATION.
Exhibits I, II and III are attached hereto and made a part of this Appendix by
reference.

     I.  DEFINITIONS

         As used herein and for the purposes of this Appendix, the following
         terms shall have the meanings set forth below:

         A.       Access Usage Record (AUR) - a message record which contains
                  the usage measurement reflecting the service feature group,
                  duration and time of day for a message and is subsequently
                  used to bill access to Interexchange Carriers (IXCs).

         B.       Assembly and Editing - the aggregation of recorded customer
                  message details to create individual message records and the
                  verification that all necessary information required to ensure
                  all individual message records meet industry specifications is
                  present.

         C.       Billing Company - the company that bills end users for the
                  charges incurred in originating and terminating IXC
                  transported calls.

         D.       Centralized Message Distribution System (CMDS) - the national
                  network of private line facilities used to exchange Exchange
                  Message Records (EMR) formatted billing data between SWBT and
                  the Billing Company.

         E.       Data Transmission - the forwarding by SWBT of IXC transported
                  toll message detail and/or access usage record detail in EMR
                  format over data lines or on magnetic tapes to the appropriate
                  Billing Company.

         F.       Exchange Message Record (EMR) - Industry standard message
                  format as described in accordance with the Bellcore Practice
                  BR010-200-010 developed for the interexchange of
                  telecommunications message information.

         G.       Interexchange Carrier (IXC) - A third party transmission
                  provider that carries long distance voice and non-voice
                  traffic between user locations for a related 


<PAGE>   233
                                                              APPENDIX RECORDING

                  recurring fee. IXCs provide service interstate and
                  intrastate. In some states IXCs are permitted to operate
                  within a LATA.

         H.       Interexchange Carrier Transported - telecommunications
                  services provided by an IXC or traffic transported by
                  facilities belonging to an IXC.

         I.       Message Processing - the creation of individual EMR formatted
                  billable message detail records from individual recordings
                  that reflect specific billing detail for use in billing the
                  end user and/or access usage records from individual
                  recordings that reflect the service feature group, duration
                  and time of day for a message, Carrier Identification Code,
                  among other fields, for use in billing access to the
                  Interexchange Carriers. Message Processing includes performing
                  CMDS online edits required to ensure message detail and access
                  usage records are consistent with CMDS specifications.

         J.       Originating Local Exchange Carrier Company - the company whose
                  local exchange telephone network is used to originate calls
                  thereby providing originating exchange access to IXCs.

         K.       Provision of Message Detail - the sorting of all billable
                  message detail and access usage record detail by Revenue
                  Accounting Office, Operating Company Number or Service Bureau,
                  splitting of data into packs for invoicing, and loading of
                  data into files for data transmission to LSP for those records
                  created internally or received from other Local Exchange
                  Carrier Companies or Interexchange Carriers through SWBT's
                  internal network or national CMDS.

         L.       Record - a logical grouping of information as described in the
                  programs that process information and create the magnetic
                  tapes or data files.

         M.       Recording - the creation and storage on magnetic tape or other
                  medium of the basic billing details of a message in Automatic
                  Message Accounting (AMA) format.

         N.       Service Switching Point (SSP) - a signaling point that can
                  launch queries to databases and receive/interpret responses
                  used to provide specific customer services.

         O.       Switching Control Point (SCP) - the real time database system
                  that contains routing instructions for 800 calls. In addition
                  to basic routing instructions, the SCP may also provide
                  vertical feature translations, i.e., time of day, day of week
                  routing, out of area screening and/or translation of the
                  dialed 800 number to its assigned working telephone number.

         P.       800 SCP Carrier Access Usage Summary Record (SCP Record) - a
                  summary record which contains information concerning the
                  quantity and types of queries launched to a SWBT SCP. In those
                  situations where charges are applicable for 

<PAGE>   234
                                                              APPENDIX RECORDING

                  the production and delivery of SCP records, such charges
                  will be those specified in Exhibit III-A pertaining to the
                  production and forwarding of AUR data.

         Q.       Terminating Local Exchange Carrier Company - the company whose
                  local exchange telephone network is used to terminate calls
                  thereby providing terminating exchange access to IXCs.

     II. RESPONSIBILITIES OF THE PARTIES

         A.       SWBT will record all IXC transported messages for LSP carried
                  over all Feature Group Switched Access Services that are
                  available to SWBT-provided recording equipment or operators.
                  Unavailable messages (i.e., certain operator messages which
                  are not accessible by SWBT-provided equipment or operators)
                  will not be recorded. The recording equipment will be provided
                  at locations selected by SWBT.

         B.       SWBT will perform assembly and editing, message processing and
                  provision of applicable access usage record detail for IXC
                  transported messages if the messages are recorded by SWBT.

         C.       SWBT will provide access usage records that are generated by
                  SWBT.

         D.       Assembly and editing will be performed on all IXC transported
                  messages recorded by SWBT, during the billing period
                  established by SWBT and selected by LSP from Exhibit III-B.

         E.       Standard EMR record formats for the provision of billable
                  message detail and access usage record detail will be
                  established by SWBT and provided to LSP.

         F.       Recorded access usage record detail will not be sorted to
                  furnish detail by specific end users, by specific groups of
                  end users, by office, by feature group or by location.

         G.       SWBT will provide message detail to LSP either on magnetic
                  tapes or in data files, depending on the option contracted for
                  by LSP in Exhibit III. Only ONE method may be selected by the
                  LSP.

                  1.       Magnetic Tapes

                           a.     SWBT will supply the magnetic tapes, which
                                  will be provided without the return of
                                  previously supplied tapes.

                           b.     LSP will specify one of the following options
                                  for provision of tapes:
<PAGE>   235
                                                              APPENDIX RECORDING


                                    1)      SWBT may send the tapes to LSP via 
                                            first class U.S. Mail Service or an
                                            equivalent service of SWBT's 
                                            choice, or
                                    2)      LSP may pick up the magnetic tapes
                                            at a location designated by SWBT.
                                    3)      If, at the request of LSP, overnight
                                            delivery other than those provided
                                            in 1 & 2 above is requested, the
                                            cost of this delivery will be at the
                                            expense of LSP.

                           2.       Data Files

                                    The message detail may be transmitted to LSP
                                    in data files via data lines using software
                                    and hardware acceptable to both parties.

         H.       In Exhibit III LSP will identify separately the location where
                  the tapes and any data transmissions should be sent (as
                  applicable) and the number of times each month the information
                  should be provided. SWBT reserves the right to limit the
                  frequency of transmission to existing SWBT processing and work
                  schedules, holidays, etc.

         I.       SWBT will determine the number of magnetic tapes or data files
                  required to provide the access usage record detail to LSP.

         J.       Access usage record detail previously provided LSP and lost or
                  destroyed through no fault of SWBT will not be recovered and
                  made available to LSP except on an individual case basis at a
                  cost determined by SWBT.

         K.       When SWBT receives rated billable messages from an IXC or
                  another Local Exchange Carrier (LEC) that are to be billed by
                  LSP, SWBT will forward those messages to LSP.

         L.       When SWBT has rated billable message detail originating from
                  LSP's end users requiring billing by another LEC or LSP, SWBT
                  will forward such messages to the appropriate Billing Company.

         M.       SWBT will record the applicable detail necessary to generate
                  access usage records and forward them to LSP for its use in
                  billing access to the IXC.

III.     BASIS OF COMPENSATION

         A.       Compensation for recording, assembly and editing, rating,
                  message processing and provision of messages provided
                  hereunder by SWBT for the LSP shall be based upon the rates
                  and charges set forth in Exhibit III, BASIS OF COMPENSATION.
<PAGE>   236
                                                              APPENDIX RECORDING

         B.       When message detail is entered on a magnetic tape or data file
                  for provision of message detail to LSP, a per record charge
                  will apply for each record processed. SWBT will determine the
                  charges based on its count of the records processed.

IV.      LIABILITY

         A.       Except as otherwise provided herein, neither party shall be
                  liable to the other for any special, indirect, or
                  consequential damage of any kind whatsoever. A party shall not
                  be liable for its inability to meet the terms of this
                  Agreement where such inability is caused by failure of the
                  first party to comply with the obligations stated herein. Each
                  party is obliged to use its best efforts to mitigate damages.

         B.       When SWBT is notified that, due to error or omission,
                  incomplete data has been provided to the LSP, SWBT will make
                  reasonable efforts to locate and/or recover the data and
                  provide it to the LSP at no additional charge. Such requests
                  to recover the data must be made within 30 days from the date
                  the details initially were made available to the LSP. If
                  written notification is not received within 30 days, SWBT
                  shall have no further obligation to recover the data and shall
                  have no further liability to the LSP.

         C.       If, despite timely notification by the LSP, message detail is
                  lost and unrecoverable as a direct result of SWBT having lost
                  or damaged tapes or incurred system outages while performing
                  recording, assembly and editing, rating, message processing,
                  and/or transmission of message detail, SWBT will estimate the
                  volume of lost messages and associated revenue based on
                  information available to it concerning the average revenue per
                  minute for the average interstate and/or intrastate call. In
                  such events, SWBT's liability to the LSP shall be limited to
                  the granting of a credit adjusting amounts otherwise due from
                  it equal to the estimated net lost revenue associated with the
                  lost message detail.

         D.       SWBT will not be liable for any costs incurred by the LSP when
                  the LSP is transmitting data files via data lines and a
                  transmission failure results in the non-receipt of data by
                  SWBT.

         E.       The LSP agrees to defend, indemnify, and hold harmless SWBT
                  from any and all losses, damages, or other liability,
                  including attorney fees, that it may incur as a result of
                  claims, demands, or other suits brought by any party that
                  arise out of the use of this service by the LSP, its customers
                  or end users. The LSP shall defend against all end users'
                  claims just as if the LSP had provided such service to its end
                  users with its own employees.

         F.       The LSP also agrees to release, defend, indemnify and hold
                  harmless SWBT from any claim, demand or suit that asserts any
                  infringement or invasion of privacy or confidentiality of any
                  person(s), caused or claimed to be caused, directly or
                  indirectly, by SWBT employees and equipment associated with
                  provision of this 

<PAGE>   237
                                                              APPENDIX RECORDING


                  service. This includes, but is not limited to suits arising 
                  from disclosure of any customer specific information 
                  associated with either the originating or terminating numbers 
                  used to provision this service.

SWBT MAKES NO REPRESENTATIONS OR WARRANTIES, EXPRESS OR IMPLIED,
INCLUDING BUT NOT LIMITED TO ANY WARRANTY AS TO 
  MERCHANTABILITY 
OR FITNESS FOR INTENDED OR PARTICULAR PURPOSE WITH RESPECT TO SERVICES PROVIDED 
HEREUNDER. ADDITIONALLY, SWBT ASSUMES NO RESPONSIBILITY WITH REGARD TO THE 
CORRECTNESS OF THE DATA SUPPLIED BY LSP WHEN THIS DATA IS ACCESSED AND USED BY
A THIRD PARTY.



<PAGE>   238

                                    EXHIBIT 1

                         EXPLANATION OF SERVICE OPTIONS

The attached pages of this Exhibit I show the service options that are offered
under this Appendix and the charges that are associated with each option.
Alphabetical and numerical references in the CHARGES columns are to rates and
charges set forth in Exhibit III, BASIS OF COMPENSATION.

ORIGINATING 1+ DDD RECORDINGS - IXC TRANSPORTED MESSAGE DETAIL AND ACCESS USAGE 
RECORDS

OPTION #1:        SWBT performs recording, assembly and editing, rating of
                  billable message detail and creates an Access Usage Record
                  (AUR) for all 1+ Interexchange Carrier (IXC) transported
                  messages originating from LSP end office telephone network and
                  forwards both billable message detail records and AUR records
                  to LSP.

OPTION #2:        SWBT performs recording, assembly and editing of the
                  billable message detail and extracts that detail to the IXC
                  for all 1+ IXC transported messages originating from LSP end
                  office. SWBT creates Access Usage Records for this traffic and
                  forwards those AUR records to LSP.

OPTION #3:        The IXCs do their own billable message recording for their
                  1+ IXC transported messages originating from LSP end office.
                  SWBT performs recording for Access purposes only, assembles
                  and edits this data, creates AURs and forwards the AUR records
                  to LSP.

ORIGINATING OPERATOR RECORDINGS - IXC TRANSPORTED MESSAGE DETAIL AND ACCESS 
USAGE RECORDS

OPTION #4:        LSP Non-Equal Access End Office - The IXCs do their own
                  billable message recording. SWBT performs local and intraLATA
                  operator services for LSP. SWBT performs recording at the
                  operator switch for all 0+, 0-, Coin Sent Paid, CAMA and
                  International IXC transported messages. SWBT assembles and
                  edits this data, creates AURs and forwards the AUR records to
                  LSP.

OPTION #5:        LSP Equal Access End Office - The IXCs do their own
                  billable message recording. SWBT performs local and intraLATA
                  operator services for LSP. SWBT performs recording at the
                  operator switch for 0- only IXC transported messages. SWBT
                  assembles and edits this data, creates AURs and forwards the
                  AUR records to LSP.

OPTION #6:        LSP Equal or Non-Equal Access End Office - The IXCs do
                  their own billable message recording. LSP chooses to have SWBT
                  purchase source information from IXC in order to have
                  information required to create Access Usage Records. SWBT
                  assembles and edits this data, creates AURs and forwards the
                  AUR records to LSP.
<PAGE>   239

OPTION #7:        The IXCs do their own billable message recording and
                  forward to SWBT the billable message detail for assembly and
                  editing and rating of these operator service IXC transported
                  messages. SWBT forwards the rated billable message detail to
                  the appropriate billing company, creates an AUR and forwards
                  the AUR records to LSP. This situation occurs when the LSP has
                  not signed a rating takeback waiver with the IXC.

800 RECORDINGS - IXC TRANSPORTED MESSAGE DETAIL

OPTION #8:        SWBT performs SSP function for LSP end office and bills
                  query charge to the appropriate IXC. SWBT performs recording
                  for Access purposes only, assembles and edits this data,
                  creates AURs and forwards AUR records to LSP.

OPTION #9:        SWBT performs SSP function for LSP end office. LSP
                  performs billing of query charge to the appropriate IXC. SWBT
                  performs recording at the SSP for Access purposes only,
                  assembles and edits this data, creates AURs and forwards AUR
                  records to LSP. SWBT performs recording at the SCP for query
                  billing purposes only, assembles and edits this data, creates
                  SCP records and forwards SCP records to LSP.

OPTION 10:        SWBT performs SCP function for LSP. SWBT performs
                  recording at the SCP, assembles and edits this data, creates
                  SCP records and forwards SCP records to LSP.

TERMINATING RECORDINGS - IXC TRANSPORTED ACCESS USAGE RECORDS

OPTION 11:        SWBT provides tandem function for LSP. LSP requests SWBT
                  to provide all Feature Group B, Feature Group C and Feature
                  Group D terminating usage recordings including Feature Group B
                  over D and Feature Group C over D. SWBT creates terminating
                  AURs for this data and forwards AUR records to the LSP.

OPTION 12:        SWBT provides tandem function for LSP. The LSP requests
                  SWBT to provide all Feature Group B terminating usage
                  recordings excluding B over D. SWBT creates terminating AURs
                  for this data and forwards AUR records to LSP.

OPTION 13:        SWBT provides tandem function for LSP. LSP requests SWBT
                  to provide all Feature Group B terminating usage recordings
                  including Feature Group B over D. SWBT creates terminating
                  AURs for this data and forwards AUR records to the LSP.

OPTION 14:        SWBT provides tandem function for LSP. LSP requests SWBT
                  to provide all Feature Group D terminating usage recordings
                  including B over D and C over D. SWBT creates terminating AURs
                  for this data and forwards AUR records to the LSP.
<PAGE>   240

OPTION 15:        SWBT provides tandem function for LSP. The LSP requests
                  SWBT to provide all Feature Group D terminating usage
                  recordings including B over D. SWBT creates terminating AURs
                  for this data and forwards AUR records to the LSP.

MESSAGE PROVISIONING:

OPTION 16:        SWBT will forward all IXC transported message detail
                  records or access usage records to LSP generated internally
                  within SWBT system or received via CMDS from an IXC or another
                  Local Exchange Carrier or LSP. LSP forwards rated IXC
                  transported message detail or access usage detail to SWBT for
                  distribution to the appropriate billing company through SWBT's
                  internal network or using the CMDS network.

                           There is no charge for this option under this
                           Appendix if LSP has also executed, as part of an
                           agreement executed pursuant to this Statement, an
                           Appendix for SWBT to provide "Hosting" services to
                           LSP, of if LSP has executed a separate agreement with
                           SWBT for "Hosting" services to be provided from SWBT
                           to LSP.

<PAGE>   241

                            DRAFT APPENDIX RECORDING

                                   EXHIBIT II

                            SELECTED SERVICE OPTIONS

                                       AND

                               METHOD OF PROVISION

The service options and method of provision selected by the LSP under this
Appendix are as indicated on page two, attached, of this Exhibit II. Numerical
references are to service options shown in Exhibit I.
<PAGE>   242

                               APPENDIX RECORDING

                                   EXHIBIT II

                            SELECTED SERVICE OPTIONS
                                       AND
                               METHOD OF PROVISION


Attached to and made a part of the RECORDING, MESSAGE PROCESSING AND PROVISION
OF INTEREXCHANGE CARRIER TRANSPORTED MESSAGE DETAIL AGREEMENT effective 
_______________ , 19 __, between Southwestern Bell Telephone Company and
                                                                            
_________________________________________________________.

The service options and method of provision selected by the LSP under this
Appendix are as indicated on page 2, attached, of this Exhibit II. Numerical
references are to service options shown in Exhibit I.








Approved and executed the              day of                      , 19        .
                          ------------        ---------------------     -------

                                                     SOUTHWESTERN BELL
- ---------------------------                          TELEPHONE COMPANY


By:                                                  By:
   ------------------------                             ----------------------
          (Title)                                         (Title)
<PAGE>   243


                               APPENDIX RECORDING

                                   EXHIBIT II

                            SELECTED SERVICE OPTIONS
                             AND METHOD OF PROVISION

                                 EFFECTIVE DATE:
                                                ----------

<TABLE>
<CAPTION>
                                                                                                           MESSAGE
               1+DDD                OPERATOR HANDLED       800 SERVICE               TERMINATING AUR     PROVISIONING
              OPTIONS                    OPTIONS             OPTIONS                      OPTIONS          OPTIONS
<S>          <C>   <C>   <C>   <C>   <C>   <C>   <C>   <C>    <C>   <C>    <C>    <C>    <C>    <C>    <C>    <C>
NPA/NXX      1     2     3     4     5     6     7     8      9     10     11     12     13     14     15     16

</TABLE>

   Numerical references are to specific service options listed in Exhibit I.






                                                                               6
<PAGE>   244

                               APPENDIX RECORDING

                                   EXHIBIT II

                            SELECTED SERVICE OPTIONS
                             AND METHOD OF PROVISION

                                 EFFECTIVE DATE:
                                                ---------------

METHOD OF PROVISION:

  Circle One:  DATA FILE     9 TRACK MAGNETIC TAPE        18 TRACK MAGNETIC TAPE







                                                                               7
<PAGE>   245

                            DRAFT APPENDIX RECORDING

                                  EXHIBIT III-A

           BASIS OF COMPENSATION [RATES TO BE CONSISTENT WITH ORDER.]

                                   EFFECTIVE:
                                             -----------------------

        LSP shall pay SWBT the following amounts for services provided under the
        Recording, Message Processing and Provision of Message Detail Appendix.

<TABLE>
<CAPTION>
        TYPE OF ACTIVITY                                    RATE
<S>          <C>                                     <C>              <C>
        A.    Recording
                    Per AUR                           $     .0100

        B.    Assembly and Editing
                    Per Message and/or AUR            $     .0050

        C.    Rating
                    Per Message                       $     .0050

        D.    Message Processing
                    Per Message and/or AUR            $     .0050

        E.    Provision of Message Detail
                    Per Record                        $     .0030

        F.    Source Information Provided
              1 Per Record Purchased - Meet Point Bill Applicable     $    .0115
              2 Per Record Purchased - Meet Point Bill Not Applicable $    .0230
</TABLE>


<PAGE>   246


                            DRAFT APPENDIX RECORDING
                                  EXHIBIT III-B

                               INVOICE DESIGNATION


   COMPANY NAME:
                -------------------------------

   EXCHANGE COMPANY I.D. NUMBER (OCN):
                                       ----  ----  ---- ----


   BILLABLE INVOICE INTERVAL:

        Check One:
 ___ 
|   |
|   |
          
                           Daily (Full Status RAO Companies will receive
                      billable messages daily.)


 ___ 
|   |                       Bill period (A maximum of five dates may be chosen.)
|   |                 A file is created five workdays from each bill
                      period date, and three additional days should be
                      allowed for distribution. Circle a maximum of five
                      bill period dates:

1    3    5    7    9    11    13    15    17    19    21    23    25    27   29

   TAPE MAILING ADDRESS:
   (Full RAO Companies will receive AURs at the same address as billable message
toll.)





<PAGE>   247



                            DRAFT APPENDIX RECORDING
                                  EXHIBIT III-B


   AUR INVOICE INTERVAL:

         Check One:

 ___ 
|   |                 Daily (Full Status RAO Companies will receive AURs daily.)
|   |
     
 ___ 
|   |                 Bill period (A maximum of five dates may be chosen.) A 
|   |            file is created five workdays from each bill period date, and
                 three additional days should be allowed for distribution. 
                 Circle a maximum of five bill period dates:

1    3     5    7     9    11   13   15   17    19    21    23    25    27    29


   TAPE MAILING ADDRESS:
   (Full RAO Companies will receive AURs at the same address as billable message
toll.)


<PAGE>   248
                                                   APPENDIX-RESALE (MO, AR & KS)
                                                                    PAGE 2 OF 12
                                 APPENDIX RESALE

This Appendix sets forth the rates, terms and conditions for those services
available for sale at retail to end users which are made available to LSPs by
SWBT for resale.

1.0      TERMS AND CONDITIONS OF SERVICE

         1.1      For services included in this Appendix, the rules and
                  regulations associated with the corresponding tariffs apply
                  except for applicable resale restrictions, which are offered
                  through tariffs by SWBT to its end users and except as
                  otherwise provided herein.

         1.2      LSP shall only sell Plexar services to a single end user.

         1.3      Except where otherwise explicitly provided in the
                  corresponding tariffs, LSP shall not permit the sharing of a
                  service by multiple end users or the aggregation of traffic
                  from multiple end users onto a single service or except where
                  SWBT permits such sharing by its own end users.

         1.4      The LSP shall resell these telecommunications services only to
                  the same class of customers to which SWBT sells the services,
                  e.g. residence service may not be resold to business
                  customers. LSP may only resell Lifeline Assistance, Link-Up,
                  and other like services to similarly situated customers who
                  are eligible for such services. Further, to the extent LSP
                  resells services that require certification on the part of the
                  buyer, LSP will ensure that the buyer has received proper
                  certification and complies with all rules and regulations as
                  established by the Commission.

         1.5      SWBT promotions of ninety (90) days or less shall not be 
                  available to the LSP for resale.

         1.6      The LSP shall not use a resold service to avoid the rates,
                  terms and conditions of SWBT's corresponding retail tariff.

         1.7      The LSP shall not use resold local exchange telephone service
                  to provide access or interconnection services to itself,
                  interexchange carriers (IXCs), wireless carriers, competitive
                  access providers (CAPs), or other telecommunications
                  providers. Provided however, that LSP may permit its end users
                  to use resold local exchange telephone service to access IXCs,
                  wireless carriers, CAPs, or other retail telecommunications
                  providers.

         1.8      An End User Common Line (EUCL) charge will continue to apply
                  for each local exchange line resold under this agreement. All
                  federal rules and regulations associated with EUCL charges, as
                  found in Tariff FCC 73, also apply.
<PAGE>   249
                                                   APPENDIX-RESALE (MO, AR & KS)
                                                                    PAGE 3 OF 12
    
         1.9      To the extent allowable by law, LSP shall be responsible for
                  Primary Interexchange Carrier (PIC) change charges associated
                  with such local exchange line. LSP shall pay for PIC changes
                  at the tariffed rate.

         1.10     SWBT shall provide the services covered by this Appendix
                  subject to availability of existing facilities and on a
                  nondiscriminatory basis with its other customers. LSP shall
                  resell the services provided herein only in those service
                  areas in which such resale services or any feature or
                  capability thereof are offered at retail by SWBT as the
                  incumbent local exchange carrier to its end users.

         1.11     When LSP converts an end user currently receiving non-complex
                  service from the SWBT network, without any changes to SWBT's
                  network, LSP will be charged a per-order conversion charge of
                  twenty-five dollars ($25.00) in Arkansas, Kansas and Missouri.
                  When LSP converts an end user with non-complex service and
                  adds or changes are made to the network, the respective
                  twenty-five dollars ($25.00) conversion charge will apply, as
                  well as any normal service order charges associated with said
                  changes. All nonrecurring service connection charges,
                  excluding the conversion charge mentioned above, will be
                  charged at a discount for those services listed in Exhibits A
                  & B to this Appendix. Complex conversion orders will be
                  charged at a rate of one hundred twenty-five dollars
                  ($125.00). Custom Services conversions (e.g., Plexar Custom)
                  will be handled on a Customer Specific Proposal basis.

         1.12     For the purposes of ordering service under this Appendix, all
                  requests for service shall be handled as an initial request
                  for service. The additional line rate for Service Order
                  Charges shall apply only to those requests for additional
                  residential service at the end user's same location where a
                  residential line is currently provided on SWBT's network,
                  regardless of the non-facilities based local service provider
                  of record.

         1.13     If the LSP is in violation of a provision of this Appendix,
                  SWBT will notify the LSP of the violation in writing. Such
                  notice must refer to the specific provision being violated. At
                  such time, the LSP will have thirty (30) days to correct the
                  violation and notify SWBT in writing that the violation has
                  been corrected. SWBT will then bill the LSP for the charges
                  which should have been collected by SWBT or the actual
                  revenues collected by the LSP from its end users for the
                  stated violation, whichever is greater. Should the LSP dispute
                  the violations, it must notify SWBT in writing within fourteen
                  (14) days of receipt of notice from SWBT. Disputes will be
                  resolved as outlined in the Disputed Amounts Section of the
                  Agreement.

         1.14     SWBT is not required to make services available for resale at
                  wholesale rates to LSP for is own use. SWBT, however, shall at
                  its option agree to allow LSP to


<PAGE>   250

                                               APPENDIX-RESALE (MO, AR & KS)
                                                                    PAGE 4 OF 12
    
                  purchase SWBT's Telecommunications Services and other services
                  available for resale as outlined in the exhibits to this
                  Appendix, as long as said services are not resold exclusively
                  or predominately to LSP, its subsidiaries, or affiliates.

         1.15     The effective date of this Appendix shall be ten (10) days
                  after the date the Commission approves the Interconnection
                  Agreement.

2.0      ANCILLARY SERVICES

         2.1      Where available, SWBT will afford LSP end users with the
                  ability to make 911 calls. LSP shall be responsible for
                  collecting and remitting all applicable 911 surcharges on a
                  per line basis to the Public Safety Answering Point (PSAP).

         2.2      Where requested by SWBT, the LSP shall provide SWBT with
                  accurate and complete information regarding end users in a
                  format and time frame prescribed by SWBT, for purposes of 911
                  administration.

         2.3      SWBT shall provide LSP's end users access to SWBT Directory
                  Assistance Service. LSP shall pay SWBT amounts attributable to
                  Directory Assistance services used by LSP's end users.
                  Discounts associated with the utilization of Directory
                  Assistance Service are outlined in the exhibits to this
                  Appendix.

         2.4      SWBT shall provide, at no additional charge, a straight line
                  listing of the LSP end user in the appropriate SWBT local
                  White Pages. Subscriber listing information on resold lines
                  shall remain the property of SWBT.

         2.5      Additional Listing services (e.g., foreign or signature
                  listings) can be purchased by LSP for its end users on a per
                  listing basis. LSP shall pay SWBT amounts attributable to
                  Additional Listing services used by LSP's end users. The
                  exhibits outline the discounts associated with such additional
                  listing services.

         2.6      SWBT or its agents will deliver local White Pages directories
                  to LSP end user's premises at the same time and under the same
                  conditions that such directories are delivered to SWBT end
                  users.

                  2.6.1    LSP end users shall be entitled to one directory per
                           basic residential or business line provided by SWBT
                           pursuant to this Appendix.

                  2.6.2.   SWBT, or its agents, shall deliver a White Pages
                           Directory to LSP end users' premises at the same time
                           that such directories are delivered to SWBT end
                           users. If an LSP's end user already has a current
                           SWBT directory, SWBT shall not be required to deliver
                           a directory to that end user until new directories
                           are published for that end user's location.

                                       
<PAGE>   251
                                                   APPENDIX-RESALE (MO, AR & KS)
                                                                    PAGE 5 OF 12
    
         2.7      SWBT shall provide LSP's end users access to SWBT's Operator
                  Services. LSP shall pay SWBT amounts attributable to Operator
                  Services used by LSP's end users. Discounts associated with
                  the utilization of Operator Services features are outlined in
                  the exhibits to this Appendix.

3.0      BRANDING

         3.1      Except where otherwise required by law, LSP shall not, without
                  SWBT's written authorization, offer the resale services
                  covered by this Appendix using the trademarks, service marks,
                  trade names, brand names, logos, insignia, symbols or
                  decorative designs of SWBT or its affiliates, nor shall the
                  LSP state or imply that there is any joint business
                  association or similar arrangement with SWBT in the provision
                  of telecommunications services to its own customers. The LSP
                  may brand services included in this Appendix with its own
                  brand name, but SWBT will not provide for LSP branding of
                  those services.

         3.2      Development of Branding Directory Assistance and Operator 
                  Services

                  A.       REQUIREMENTS - Pursuant to Section 226 (b) of The
                           Telecommunications Act of 1996, each provider of
                           Operator Services is required to:

                           1.       provide its brand at the beginning of each
                                    telephone call and before the consumer
                                    incurs any charge for the call; and

                           2.       disclose immediately to the consumer, upon
                                    request a quote of its rates or charges for
                                    the call.

                           3.       Where SWBT provides LSPs OS and DA services
                                    via the same trunk, both the OS and DA calls
                                    will be branded with the same brand. Since
                                    SWBT's DA and OS utilize the same trunk
                                    group, LSP will receive the same brand for
                                    both DA/OS. Such branding will be provided
                                    pursuant Section B. below.

                  B.       CALL BRANDING - In compliance with A. 1. above, SWBT
                           will brand DA/OS in LSP's name based upon the
                           criteria outlined below:

                           1.       LSP will provide SWBT with written
                                    specification of its company name to be used
                                    in creating LSP specific branding messages
                                    for its DA/OS calls.

                           2.       An initial non-recurring charge applies per
                                    TOPS switch, per load, for the establishment
                                    of Call Branding as well as a charge per
                                    TOPS switch, per subsequent load to change
                                    the brand. In addition, a per call charge
                                    applies for every DA/OS call handled


<PAGE>   252
                                                   APPENDIX-RESALE (MO, AR & KS)
                                                                    PAGE 6 OF 12
    

                                    by SWBT on behalf of LSP when such services
                                    are provided in conjunction with resale
                                    services. Prices for Call Branding are as
                                    outlined in Exhibit C, attached hereto and
                                    incorporated herein.

                  C.       RATE/REFERENCE INFORMATION - SWBT will provide LSP
                           DA/OS Rate/Reference Information based upon the
                           criteria outlined below:

                           1.       LSP will furnish DA/OS Rate and Reference
                                    Information in a mutually agreed to format
                                    or media thirty (30) days in advance of the
                                    date when the DA/OS Services are to be
                                    undertaken.

                           2.       LSP will inform SWBT, in writing, of any
                                    changes to be made to such Rate/Reference
                                    Information ten (10) working days prior to
                                    the effective Rate/Reference change date.
                                    LSP acknowledges that it is responsible to
                                    provide SWBT updated Rate/Reference
                                    Information in advance of when the
                                    Rates/Reference Information are to become
                                    effective.

                           3.       In all cases when a SWBT Operator receives a
                                    rate request from a LSP end user, SWBT will
                                    quote the applicable DA/OS rates as provided
                                    by LSP.

                           4.       An initial non-recurring charge will apply
                                    per TOPS switch for loading of LSP's DA/OS
                                    Rate/Reference Information as well as a
                                    charge for each subsequent change, per TOPS
                                    switch to either the LSP's DA/OS Services
                                    Rate or Reference Information as outlined in
                                    Exhibit C, attached hereto and incorporated
                                    herein.

         3.4      SWBT shall also offer LSP the opportunity to customize route
                  DA/OS beginning March 1, 1997, where technically feasible. LSP
                  agrees to pay SWBT appropriate charges associated with
                  customized routing on an ICB basis.

4.0      RESPONSIBILITIES OF SWBT

         4.1      SWBT shall allow LSP to place service orders and receive phone
                  number assignments (for new lines). These activities shall be
                  accomplished by telephone call or facsimile until electronic
                  interface capability has been established. SWBT, with input
                  from LSP, shall provide interface specifications for
                  electronic access for these functions to LSP once such
                  electronic interfaces become technically feasible and are in
                  place. However, LSP shall be responsible for modifying and
                  connecting any of its systems with SWBT provided interfaces
                  when such interfaces become available, as outlined in Appendix
                  OSS.

                                       
<PAGE>   253
                                                   APPENDIX-RESALE (MO, AR & KS)
                                                                    PAGE 7 OF 12
    
         4.2      SWBT shall implement LSP service orders within the same time
                  intervals SWBT uses to implement service orders for similar
                  services for its own end users.

         4.3      LSP will have the ability to report trouble for its end users
                  to appropriate SWBT trouble reporting centers twenty-four (24)
                  hours a day, seven (7) days a week. LSP will be assigned a
                  customer contact center when initial service agreements are
                  made. LSP end users calling SWBT will be referred to LSP at
                  the number provided by LSP.

                  4.3.1.   Methods and procedures for ordering and trouble
                           reporting are outlined in the Handbook for
                           Non-Switched Based Providers dated 11/15/95, as
                           amended by SWBT from time to time. Both parties agree
                           to abide by the procedures contained therein.

         4.4      SWBT will provide LSP with the detailed billing information in
                  a standard electronic format as outlined in Appendix OSS
                  necessary for LSP to issue a bill to its end users. On no less
                  than sixty (60) days advance written notice, LSP will have the
                  option of receiving daily usage to monitor the patterns of its
                  end users' usage sensitive services. LSP agrees to pay SWBT
                  three tenths of a cent ($.003) per message.

         4.5      SWBT shall make telecommunications services that SWBT provides
                  at retail to subscribers who are not telecommunications
                  carriers available for resale consistent with its obligation
                  under Section 251(c)(4)(A) of the Telecommunications Act. SWBT
                  currently uses the Accessible Letter process to notify LSP of
                  new services available for resale during the term of this
                  Agreement. The notification shall advise LSP of the category
                  in which such new service shall be placed and the same
                  discount already applicable to LSP in that category shall
                  apply to the new service. Should SWBT change its notification
                  procedures to the LSP, the notice will be no less prompt than
                  the Accessible Letter.

                  4.5.1    Furthermore, to the extent that a federal or state
                           regulatory agency adopts a final order establishing
                           wholesale discounts under Section 252(d)(3) of the
                           Telecommunications Act, which is not stayed and which
                           directs SWBT to apply state-specific wholesale
                           discount percentages which are different from those
                           incorporated within this Agreement, either Party
                           shall have the option of converting to that discount
                           level upon ten (10) days written notice to the other
                           Party.

         4.6      LSP end user's activation of Call Trace shall be handled by
                  the SWBT Call Trace Center (CTC) or its Annoying and Anonymous
                  Call Bureau. SWBT shall notify LSP of requests by its end
                  users to provide the call records to the proper authorities.
                  Subsequent communication and resolution of the case with LSP's
                  end 





<PAGE>   254

                                                   APPENDIX-RESALE (MO, AR & KS)
                                                                    PAGE 8 OF 12



                           user (whether that end user is the victim or the
                           suspect) will be coordinated through the LSP.

                  4.6.1.   LSP understands that for services where reports are
                           provided to law enforcement agencies (e.g., Call
                           Trace) only billing number and address information
                           shall be provided. It shall be the LSP's
                           responsibility to provide additional information
                           necessary for any police investigation. LSP shall
                           indemnify SWBT against any claims that insufficient
                           information led to inadequate prosecution. SWBT shall
                           handle law enforcement requests consistent with the
                           Miscellaneous-Law Enforcement Section of the
                           Interconnection Agreement.

         4.7      LSP may offer to resell Customer Initiated Suspension and
                  Restoral Service to their end users. SWBT will offer to LSP
                  Company Initiated Suspension service for their own purposes at
                  the SWBT retail tariffed rate. Should LSP choose to suspend
                  their end user through Company Initiated Suspension Service,
                  this suspension period shall not exceed fifteen (15) calendar
                  days. If LSP issues a disconnect on their end user account
                  within the fifteen (15) day period, appropriate services will
                  not be billed for the suspension period. However, should LSP
                  issue a disconnect after the fifteen (15) day suspension
                  period, LSP will be responsible for all appropriate charges on
                  the account back to the suspension date. Should LSP restore
                  their end user, restoral charges at the SWBT retail tariffed
                  rate will apply and LSP will be billed for the appropriate
                  service from the time of suspension.

5.0      RESPONSIBILITIES OF LSP

         5.1      Prior to submitting an order under this Agreement, LSP shall
                  obtain end user authorization as required by applicable state
                  or federal laws and regulations, and assumes responsibility
                  for applicable charges as specified in Section 258(b) of the
                  Telecommunications Act of 1996. SWBT shall abide by the same
                  applicable laws and regulations.

         5.2      Only an end user can initiate a challenge to a change in its
                  local exchange service provider. If an end user notifies SWBT
                  or LSP that the end user requests local exchange service, the
                  Party receiving such request shall be free to immediately
                  provide service to such end user. SWBT shall be free to
                  connect the end user to any local service provider based upon
                  the local service provider's request and local service
                  provider's assurance that proper end user authorization has
                  been obtained. LSP shall make authorization available to SWBT
                  upon request and at no charge.

         5.3      When an end user changes or withdraws authorization, each
                  Party shall release customer-specific facilities in accordance
                  with the end user customer's direction

<PAGE>   255

                                                   APPENDIX-RESALE (MO, AR & KS)
                                                                    PAGE 9 OF 12
    

                  or the direction of the end user's authorized agent. Further,
                  when an end user abandons the premise, SWBT is free to reclaim
                  the facilities for use by another customer and is free to
                  issue service orders required to reclaim such facilities.

         5.4      Neither Party shall be obligated by this Agreement to
                  investigate any allegations of unauthorized changes in local
                  exchange service (slamming) on behalf of the other Party or a
                  third party. If SWBT, on behalf of LSP, agrees to investigate
                  an alleged incidence of slamming, SWBT shall charge LSP a
                  fifty dollar ($50) investigation fee.

         5.5      When SWBT receives an order from LSP for services under this
                  Agreement and SWBT is currently providing the same services to
                  another local service provider for the same end user, SWBT
                  shall notify the end user's local service provider of record
                  of such order coincident with processing the order, should LSP
                  subscribe to the Local Disconnect Report (LDR) as outlined
                  below. It shall then be the responsibility of the local
                  service provider of record and LSP to resolve any issues
                  related to the end user. This paragraph shall not apply to new
                  additional lines and services purchased by an end user from
                  multiple LSPs or from SWBT.

                  5.5.1    On no less than sixty (60) days notice, LSP may
                           request the LDR., SWBT agrees to furnish to LSP the
                           Billing Telephone Number (BTN), Working Telephone
                           Number (WIN), and terminal number of all end users
                           who have disconnected LSP's service. LSP understands
                           and agrees that the CARE interface will be used to
                           provide such information and such information will
                           only be available via the CARE electronic data
                           transmission as outlined in Appendix OSS. Information
                           will be provided on a per WTN basis to be priced on a
                           per WTN basis. SWBT will provide LSP no less than
                           thirty (30) days notice prior to any change of the
                           per-WTN charge. SWBT grants to LSP a non-exclusive
                           right to use the information provided by SWBT. LSP
                           will not permit anyone but its duly authorized
                           employees or agents to inspect or use this
                           information. LSP agrees to pay SWBT ten cents ($0.10)
                           per WTN and any applicable transmission charges for
                           the LDR.

         5.6      The LSP agrees to hold harmless and indemnify SWBT against any
                  and all liability and claims, including reasonable attorney's
                  fees, that may result from SWBT acting under this Article.

         5.7      LSP is solely responsible for the payment of charges for all
                  services furnished under this Appendix including, but not
                  limited to, calls originated or accepted at LSP's location and
                  its end users' service locations, with the exception of any
                  retail services provided directly by SWBT to the end user
                  which SWBT shall be responsible for billing.
<PAGE>   256
                                                   APPENDIX-RESALE (MO, AR & KS)
                                                                   PAGE 10 OF 12
    
                  5.7.1    Interexchange carried traffic (e.g., sent-paid,
                           information services and alternate operator services
                           messages) received by SWBT for billing to resold
                           end-user accounts will be returned as unbillable and
                           will not be passed on to LSP for billing. An
                           unbillable code returned with those messages to the
                           carrier will indicate that the messages originated
                           from a resold account and will not be billed by SWBT.

         5.8      SWBT shall not be responsible for the manner in which the use
                  of resold service, or the associated charges are allocated to
                  others by LSP. All applicable rates and charges for such
                  services will be billed to and shall be the responsibility of
                  LSP, with the exception of other retail services provided
                  directly to the end user by SWBT as described in paragraph 7
                  above.

                  5.8.1.   Compensation for all services shall be paid
                           regardless of a Party's ability or inability to
                           collect charges from its end user for such service.

         5.9      If LSP does not wish to be responsible for collect, third
                  number billed, toll and information services (e.g., 900)
                  calls, it must order the appropriate blocking for resold lines
                  under this Appendix and pay any applicable charges. LSP
                  acknowledges that blocking is not available for certain types
                  of calls, including 800 numbers.

         5.10     LSP shall be responsible for modifying and connecting any of
                  its systems with SWBT-provided interfaces as described in this
                  Appendix.

         5.11     LSP shall be responsible for providing to its end users and to
                  SWBT a telephone number or numbers that LSP's end users can
                  use to contact LSP in the event of service or repair requests.
                  In the event that LSP's end users contact SWBT with regard to
                  such requests, SWBT shall inform the end user that they should
                  call LSP and may provide LSP contact number. The requirements
                  herein are subject to additional terms and conditions in the
                  Coordinated Repair Calls Section of the Agreement.

6.0      PROCEDURES FOR NONPAYMENT AND DISCONNECTION

         6.1      If LSP fails to pay when due, any and all charges billed to
                  them under this Agreement, including any late payment charges
                  (Unpaid Charges), and any portion of such charges remain
                  unpaid more than fifteen (15) days after the due date of such
                  Unpaid Charges, SWBT shall notify LSP in writing that in order
                  to avoid having service disconnected, LSP must remit all
                  Unpaid Charges to SWBT within fourteen (14) business days.

         6.2      If LSP disputes the billed charges, it shall, within the
                  fourteen (14) day period provided for above, inform SWBT in
                  writing which portion of the charges it 

<PAGE>   257
                                                   APPENDIX-RESALE (MO, AR & KS)
                                                                   PAGE 11 OF 12
    

                  disputes, including the specific details and reasons for its
                  dispute; immediately pay to SWBT all undisputed charges; and
                  pay all disputed charges into an interest bearing escrow
                  account.

         6.3      Disputes hereunder shall be resolved in accordance with the
                  procedures identified in the Dispute Resolution Section of the
                  Interconnection Agreement. Failure of LSP to pay charges
                  deemed owed to SWBT after conclusion of the Arbitration shall
                  be grounds for termination under this section.

         6.4      If any LSP charges remain unpaid or undisputed twenty-nine
                  (29) days past the due date, SWBT shall notify LSP, the
                  Commission and the end user's IXC(s) of Record in writing,
                  that unless all charges are paid within sixteen (16) days,
                  LSP's service shall be disconnected and its end users shall be
                  defaulted to SWBT local service. SWBT will also suspend order
                  acceptance at this time.

         6.5      If any LSP charges remain unpaid or undisputed forty (40) days
                  past the due date, LSP shall, at its sole expense, notify its
                  end users, the Commission and the end user's of Record that
                  their service may be disconnected for LSP failure to pay
                  Unpaid Charges, and that its end users must affinnatively
                  select a new local service provider within five (5) days. The
                  notice shall also advise the end user that SWBT will assume
                  the end user's account at the end of the five (5) day period
                  should the end user fail to select a new local service
                  provider.

         6.6      If any LSP charges remain unpaid or undisputed forty-five (45)
                  days past the due date, SWBT shall disconnect LSP and transfer
                  all LSP's end users who have not selected another local
                  service provider directly to SWBT's service. These end users
                  shall receive the same services provided through LSP at the
                  time of transfer. SWBT shall inform the Commission and the end
                  user's IXC(s) of Record of the names of all end users
                  transferred through this process. Applicable service
                  establishment charges for switching end users from LSP to SWBT
                  shall be assessed to LSP.

         6.7      Within five (5) days of the transfer (fifty (50) days past
                  LSP's due date), SWBT shall notify all affected end users that
                  because of an LSP's failure to pay, their service is now being
                  provided by SWBT. SWBT shall also notify the end user that
                  they have thirty (30) days to select a local service provider.

         6.8      SWBT may discontinue service to LSP upon failure to pay
                  undisputed charges as provided in this section, and shall have
                  no liability to LSP or LSP end users in the event of such
                  disconnection.

         6.9      If any end user fails to select a local service provider
                  within thirty (30) days of the change of providers (eighty
                  (80) days past LSP's due date), SWBT shall terminate the end
                  user's service. SWBT shall notify the Commission and the end
                  user's 


<PAGE>   258
                                                   APPENDIX-RESALE (MO, AR & KS)
                                                                   PAGE 12 OF 12
    

                  IXC of Record of the names of all end users whose service has
                  been terminated. The end user shall be responsible for any and
                  all charges incurred during the selection period.

         6.10     Nothing herein shall be interpreted to obligate SWBT to
                  continue to provide service to any such end users. Nothing
                  herein shall be interpreted to limit any and all disconnection
                  rights SWBT may have with regard to such end users.

         6.11     After disconnect procedures have begun, SWBT shall not accept
                  service orders from LSP until all unpaid charges are paid.
                  SWBT shall have the right to require a deposit equal to one
                  month's charges (based on the highest previous month of
                  service from SWBT) prior to resuming service to LSP after
                  disconnect for nonpayment.
<PAGE>   259
                                                     APPENDIX-RESALE - EXHIBIT A
                                                                     PAGE 1 OF 2

              SOUTHWESTERN BELL'S RESALE PRODUCT* LIST - RESIDENCE
                                    MISSOURI

<TABLE>
<CAPTION>
                                                                                  AVOIDED COST DISCOUNTS
                                                                           RECURRING              NON-RECURRING
                                                                           ---------              -------------
<S>                                                                          <C>                      <C>
LOCAL EXCHANGE SERVICE
Life Line and Link Up America Services                                       13.2%                    13 2%
Residence 1 Party                                                            13.2%                    13 2%
Residence Measured                                                           13.2%                    13.2%

EXPANDED LOCAL CALLING
Mandatory EAS                                                                13.2%                    13.2%
Optional Metropolitan Calling Area                                           13.2%                    13.2%

CALL MANAGEMENT SERVICES                                                     13.2%                    13.2%
Auto Redial                                                                  13.2%                    13.2%
Call Blocker                                                                 13.2%                    13.2%
Call Forwarding                                                              13.2%                    13.2%
Call Forwarding - Busy Line                                                  13.2%                    13.2%
Call Forwarding - Busy Line/Don't Answer                                     13.2%                    13.2%
Call Forwarding - Don't Answer                                               13.2%                    13.2%
Call Return                                                                  13.2%                    13.2%
Call Trace                                                                   13.2%                    13.2%
Call Waiting                                                                 13.2%                    13.2%
Calling Name                                                                 13.2%                    13.2%
Calling Number                                                               13.2%                    13.2%
ComCall                                                                      13.2%                    13.2%
Personalized Ring (1 dependent number)                                       13.2%                    13.2%
Personalized Ring (2 dependent numbers - 1st number)                         13.2%                    13.2%
Personalized Ring (2 dependent numbers - 2nd number)                         13.2%                    13.2%
Priority Call                                                                13.2%                    13.2%
Remote Access to Call Forwarding                                             13.2%                    13.2%
Selective Call Forwarding                                                    13.2%                    13.2%
Simultaneous Call Forwarding                                                 13.2%                    13.2%
Speed Calling 8                                                              13.2%                    13.2%
Three Way Calling                                                            13.2%                    13.2%

DIRECTORY ASSISTANCE SERVICES                                                13.2%                    13.2%

ISDN
Digiline(sm)                                                                 13.2%                    13.2%
</TABLE>

*Some products not available in all areas.
 Resale products available subject to state and federal rules, regulations and
 tariffs.

<PAGE>   260
                                                     APPENDIX RESALE - EXHIBIT A
                                                                     PAGE 2 OF 2


              SOUTHWESTERN BELL'S RESALE PRODUCT* LIST - RESIDENCE
                                    MISSOURI

<TABLE>
<CAPTION>
                                                                                  AVOIDED COST DISCOUNTS
                                                                           RECURRING             NON-RECURRING
                                                                           ---------             -------------
<S>                                                                          <C>                     <C>
OTHER                                                                      
Customer Alerting Enablement                                                 13.2%                   13.2%
Grandfathered Services                                                       13.2%                   13.2%
Hot Line                                                                     13.2%                   13.2%
Local Operator Assistance Service                                            13.2%                   13.2%
Packages                                                                     13.2%                   13.2%
Promotions (greater than 90 days)                                            13.2%                   13.2%
Preferred Number Service                                                     13.2%                   13.2%
Toll Restriction                                                             13.2%                   13.2%
Voice Dial                                                                   13.2%                   13.2%
Warm Line                                                                    13.2%                   13.2%

TOLL
900 Call Restriction                                                         13.2%                   13.2%
Home 800(SM)                                                                 13.2%                   13.2%
IntraLATA MTS                                                                13.2%                   13.2%
Billed Number Screen (Toll Billing Exception)                                13.2%                   13.2%

NON-TELECOMMUNICATION SERVICES
Bill Plus(SM)                                                                13.2%                   13.2%
Consolidated Billing                                                         13.2%                   13.2%
Company Initiated Suspension and Restoral Service                             0.0%                    0.0%
Customer Initiated Suspension and Restoral Service                            0.0%                    0.0%
Enhanced Directory Listings                                                  13.2%                   13.2%
</TABLE>







*Some products not available in all areas.
 Resale products available subject to state and federal rules, regulations and
 tariffs.

<PAGE>   261
                                                     APPENDIX RESALE - EXHIBIT B
                                                                     PAGE 1 OF 3


               SOUTHWESTERN BELL'S RESALE PRODUCT* LIST - BUSINESS
                                    MISSOURI

<TABLE>
<CAPTION>
                                                                                  AVOIDED COST DISCOUNTS
                                                                           RECURRING             NON-RECURRING
                                                                           ---------             -------------
<S>                                                                          <C>                     <C>
LOCAL EXCHANGE SERVICE
Business 1 Party                                                             13.2%                   13.2%
Business - Multi-Line Hunting                                                13.2%                   13.2%
Business - Measured                                                          13.2%                   13.2%
Business - Measured (HTG Class of Service)                                   13.2%                   13.2%
Semi Public Coin Telephone Service                                           13.2%                   13.2%

EXPANDED LOCAL CALLING
Mandatory EAS                                                                13.2%                   13.2%
Optional Metropolitan Calling Area                                           13.2%                   13.2%

CALL MANAGEMENT SERVICES
Auto Redial                                                                  13.2%                   13.2%
Call Blocker                                                                 13.2%                   13.2%
Call Forwarding                                                              13.2%                   13.2%
Call Forwarding - Busy Line                                                  13.2%                   13.2%
Call Forwarding - Busy Line/Don't Answer                                     13.2%                   13.2%
Call Forwarding - Don't Answer                                               13.2%                   13.2%
Call Return                                                                  13.2%                   13.2%
Call Trace                                                                   13.2%                   13.2%
Call Waiting                                                                 13.2%                   13.2%
Calling Name                                                                 13.2%                   13.2%
Calling Number                                                               13.2%                   13.2%
ComCall(R)                                                                   13.2%                   13.2%
Personalized Ring (1 dependent number)                                       13.2%                   13.2%
Personalized Ring (2 dependent numbers - 1st number)                         13.2%                   13.2%
Personalized Ring (2 dependent numbers - 2nd number)                         13.2%                   13.2%
Priority Call                                                                13.2%                   13.2%
Remote Access to Call Forwarding                                             13.2%                   13.2%
Selective Call Forwarding                                                    13.2%                   13.2%
Simultaneous Call Forwarding                                                 13.2%                   13.2%
Speed Calling 30                                                             13.2%                   13.2%
Three Way Calling                                                            13.2%                   13.2%

DID
DID (First Block of 100 - Category 1)                                        13.2%                   13.2%
DID (First Block of 10 - Category 1)                                         13.2%                   13.2%
DID (Ea. adl. block of 10 after first 10 - Category 1)                       13.2%                   13.2%
DID (Ea. adl. block of 100 after first 100 - Category 2)                     13.2%                   13.2%
DID (with dial pulse)                                                        13.2%                   13.2%
DID (with Multifrequency)                                                    13.2%                   13.2%
DID (with Dual-Tone Multifrequency)                                          13.2%                   13.2%

TRUNKS
Trunk                                                                        13.2%                   13.2%
</TABLE>


*Some products not available in all areas.
 Resale products available subject to state and federal rules, regulations and
 tariffs.

<PAGE>   262
                                                     APPENDIX RESALE - EXHIBIT B
                                                                     PAGE 2 OF 3


               SOUTHWESTERN BELL'S RESALE PRODUCT* LIST - BUSINESS
                                    MISSOURI


<TABLE>
<CAPTION>
                                                                                  AVOIDED COST DISCOUNTS
                                                                           RECURRING             NON-RECURRING
                                                                           ---------             -------------
<S>                                                                          <C>                     <C>
AIN
Area Wide Networking                                                         13.2%                   13.2%
Disaster Routing Service                                                     13.2%                   13.2%
Intelligent Redirect(SM)                                                     13.2%                   13.2%
IntelliNumber                                                                13.2%                   13.2%
Positive ID                                                                  13.2%                   13.2%

OTHER
Customer Alerting Enablement                                                 13.2%                   13.2%
Grandfathered Services                                                       13.2%                   13.2%
Hot Line                                                                     13.2%                   13.2%
Hunting                                                                      13.2%                   13.2%
Local Operator Assistance Service                                            13.2%                   13.2%
Night Number associated with Telephone Number                                13.2%                   13.2%
Night Number associated with a Terminal                                      13.2%                   13.2%
Packages                                                                     13.2%                   13.2%
Promotions (greater than 90 days)                                            13.2%                   13.2%
Telebranch(R)                                                                13.2%                   13.2%
Toll Restriction                                                             13.2%                   13.2%
TouchTone (Business)                                                         13.2%                   13.2%
TouchTone (Trunk)                                                            13.2%                   13.2%
Voice Dial                                                                   13.2%                   13.2%
Warm Line                                                                    13.2%                   13.2%

ISDN
Digiline(SM)                                                                 13.2%                   13.2%
Select Video Plus(R)                                                         13.2%                   13.2%
Smart Trunk(SM)                                                              13.2%                   13.2%

DIRECTORY ASSISTANCE SERVICES                                                13.2%                   13.2%

TOLL
800 Service                                                                  13.2%                   13.2%
900 Call Restriction                                                         13.2%                   13.2%
Billed Number Screen (Toll Billing Exception)                                13.2%                   13.2%
IntraLATA MTS                                                                13.2%                   13.2%
MaxiMizer 800(R)                                                             13.2%                   13.2%
OutWATS                                                                      13.2%                   13.2%

PLEXAR(R)
Plexar I(R)                                                                  13.2%                   13.2%
Plexar II(R)                                                                 13.2%                   13.2%
</TABLE>


*Some products not available in all areas.
 Resale products available subject to state and federal rules, regulations and
 tariffs.
<PAGE>   263
                                                     APPENDIX RESALE - EXHIBIT B
                                                                     PAGE 3 OF 3


               SOUTHWESTERN BELL'S RESALE PRODUCT* LIST - BUSINESS
                                    MISSOURI


<TABLE>
<CAPTION>
                                                                                  AVOIDED COST DISCOUNTS
                                                                           RECURRING             NON-RECURRING
                                                                           ---------             -------------
<S>                                                                          <C>                     <C>
PRIVATE LINE
Analog Private Lines                                                         13.2%                   13.2%
Business Video Service                                                       13.2%                   13.2%
DOVLink                                                                      13.2%                   13.2%
Frame Relay                                                                  13.2%                   13.2%
MegaLink II(R)                                                               13.2%                   13.2%
MegaLink III(R)                                                              13.2%                   13.2%
MicroLink I(R)                                                               13.2%                   13.2%
Multi Point Video                                                            13.2%                   13.2%
Network Recongiguration Service                                              13.2%                   13.2%

NON-TELECOMMUNICATION SERVICES
Bill Plus(SM)                                                                13.2%                   13.2%
Consolidated Billing                                                         13.2%                   13.2%
Company Initiated Suspension and Restoral Service                             0.0%                    0.0%
Customer Initiated Suspension and Restoral Service                            0.0%                    0.0%
Enhanced Directory Listings                                                  13.2%                   13.2%
</TABLE>






*Some products not available in all areas.
 Resale products available subject to state and federal rules, regulations and
 tariffs.
<PAGE>   264
                                                     APPENDIX RESALE - EXHIBIT C
                                                                     PAGE 1 OF 1

                           APPENDIX RESALE - EXHIBIT C
                                    MISSOURI
                   OS/DA PRICING - BRANDING, RATE & REFERENCE



The following rates will apply for each service element:

<TABLE>
<S>                                                                                          <C>
A.  CALL BRANDING

An initial non-recurring charge applies per TOPS switch, per brand for the
establishment of LSP specific Call Branding. A Per Call charge also applies.
When there are subsequent changes to the branding announcement, an additional
non-recurring charge will also apply per change.

                                                     Rate per initial load group             $2,325.00
                                                  Rate per load for Brand change             $2,325.00
                                                                        Per Call               $0.02

B.  DIRECTORY ASSISTANCE RATE/REFERENCE INFORMATION

An initial non-recurring charge applies per TOPS switch for the initial load of
LSP's DA Services Rate/Reference Information. An additional non-recurring charge
applies for each subsequent change to Rate/Reference Information.
                                                           Rate per initial load             $3,850.00
                                                 Rate per subsequent rate change             $2,850.00
                                            Rate per subsequent reference change             $2,850.00

C.  OPERATOR SERVICES RATE/REFERENCE INFORMATION

An initial non-recurring charge applies per TOPS switch for the initial load of
LSP's Operator Services Rate/Reference Information. An additional non-recurring
charge applies for each subsequent change to Rate/Reference Information.
                                                           Rate per initial load             $3,850.00
                                                 Rate per subsequent rate change             $2,850.00
                                            Rate per subsequent reference change             $2,850.00
</TABLE>
<PAGE>   265
                                                                    APPENDIX UNE
                                                                    Page 2 of 16
                 APPENDIX: UNBUNDLED NETWORK ELEMENTS (UNE)

I.       Introduction

         A.       This Appendix Unbundled Network Elements to the Agreement sets
                  forth the unbundled Network Elements that SWBT agrees to offer
                  to LSP. The specific terms and conditions that apply to the
                  unbundled Network Elements are described below. The prices for
                  Network Elements are set forth in Appendix Pricing Schedule.

II.      General Terms and Conditions

         A.       SWBT and LSP may agree to connect LSP's facilities with SWBT's
                  network at any technically feasible point for access to
                  unbundled Network Elements for the provision by LSP of a
                  Telecommunications Service. Unbundled Network Elements may not
                  be connected to or combined with SWBT access services or other
                  SWBT tariffed service offerings with the exception of tariffed
                  collocation services.

         B.       SWBT will provide LSP access to the unbundled Network Elements
                  to permit LSP to combine such Network Elements with other
                  Network Elements obtained from SWBT or with network components
                  provided by itself to provide Telecommunications Services to
                  its customers, provided that such combination is technically
                  feasible and would not impair the ability of other carriers to
                  obtain access to other unbundled network elements or to
                  interconnect with SWBT's network. Any request by LSP for SWBT
                  to provide a type of connection between Network Elements that
                  is not currently being utilized in the SWBT network and is not
                  otherwise provided for under this Agreement will be made in
                  accordance with the Bona Fide Request process described in
                  Section III.

         C.       When LSP orders unbundled network elements, SWBT will perform
                  the functions necessary to combine unbundled network elements
                  in any manner required by law, even if those elements are not
                  ordinarily combined in SWBT's network, provided that such
                  combination is a) technically feasible; and b) would not
                  impair the ability of other carriers to obtain access to
                  unbundled network elements or to interconnect with SWBT's
                  network as provided in F.C.C. Rule 51.315 (c).

         D.       LSP is responsible to designate each network element being
                  ordered from SWBT and how those network elements are to be
                  combined. Where multiple SWBT network elements are to be
                  combined, LSP must designate the order in which the elements
                  are to be connected. Where SWBT network elements are to be
                  connected to another carrier's network element(s), LSP will
                  designate how SWBT network element(s) are to be connected
                  (i.e., cross connected) to the network element(s) of the other
                  telecommunications carrier.


<PAGE>   266
                                                                    APPENDIX UNE
                                                                    Page 3 of 16


         E.       Various subsections below list the Network Elements that LSP
                  and SWBT have identified as of the Effective Date of this
                  Agreement. SWBT will upon request of LSP and to the extent
                  technically feasible provide LSP additional Network Elements
                  or modifications to previously identified Network Elements for
                  the provision by LSP of a Telecommunications Service. Such
                  requests will be processed in accordance with the Bona Fide
                  Request process.

         F.       Unbundled Network Elements are provided under this agreement
                  over such routes, technologies, and facilities as SWBT may
                  elect at its own discretion. If LSP requests special
                  facilities, equipment or routing of unbundled network elements
                  such requests will be handled under the Bona Fide Request
                  process.

         G.       Subject to the terms herein, SWBT is responsible only for the
                  installation, operation and maintenance of the Network
                  Elements it provides. SWBT is not otherwise responsible for
                  the Telecommunications Services provided by LSP through the
                  use of those elements.

         H.       Where unbundled elements provided to LSP are dedicated to a
                  single end user, if such elements are for any reason
                  disconnected they will be made available to SWBT for future
                  provisioning needs. The LSP agrees to relinquish control of
                  any such unbundled element concurrent with the disconnection
                  of a LSPs end user's service.

         I.       The Parties acknowledge that the Commission may decline to 
                  require unbundling of Network Elements beyond those identified
                  in 47 CFR Section 51.319 if the Commission concludes that: (1)
                  such Network Element is proprietary or contains proprietary
                  information that will be revealed if such Network Element is
                  provided to LSP on an unbundled basis, and LSP could offer the
                  same proposed Telecommunications Service through the use of
                  other, nonproprietary Network Elements within SWBT's network;
                  or (2) the Commission concludes that the failure of SWBT to
                  provide access to such Network Element would not decrease the
                  quality of, and would not increase the financial or
                  administrative cost of, the Telecommunications Service LSP
                  seeks to offer, compared with providing that service over
                  other unbundled Network Elements in SWBT's network.

         J.       LSP will, upon request of SWBT, and to the extent technically
                  feasible, provide SWBT access to Network Elements for the
                  provision of SWBT's telecommunications services in
                  accordance with the Act. Such request by SWBT will be
                  processed in accordance with the Bona Fide Request process.

         K.       Each Party is solely responsible for the services it provides
                  to its end users and to other Telecommunications Carriers.


<PAGE>   267
                                                                    APPENDIX UNE
                                                                    Page 4 of 16

         L.       Network elements provided to LSP under the provisions of this
                  Appendix will remain the property of SWBT.

         M.       SWBT will provide network elements where technically feasible.
                  Where facilities and equipment are not available, LSP may
                  request and, to the extent required by law and as SWBT may
                  otherwise agree, SWBT may provide Network Elements through the
                  Bona Fide Request process.

         N.       The elements provided pursuant to this Agreement will be
                  available to SWBT at times mutually agreed upon in order to
                  permit SWBT to make tests and adjustments appropriate for
                  maintaining the services in satisfactory operating condition.
                  No credit will be allowed for any interruptions involved
                  during such tests and adjustments.

         O.       LSP's use of any SWBT network element, or of its own equipment
                  or facilities in conjunction with any SWBT network element,
                  will not materially interfere with or impair service over any
                  facilities of SWBT, its affiliated companies or its connecting
                  and concurring carriers involved in its services, cause damage
                  to their plant, impair the privacy of any communications
                  carried over their facilities or create hazards to the
                  employees of any of them or the public. Upon reasonable
                  written notice and opportunity to cure, SWBT may discontinue
                  or refuse service if LSP violates this provision.

         P.       When converting a SWBT account to an LSP account or between
                  LSP and another provider, the conversion will be handled as a
                  disconnect of the current account and a new connect of the
                  unbundled network elements account.

         Q.       Performance of Network Elements

                  1.       Each Network Element provided by SWBT to LSP will 
                           meet applicable regulatory performance standards and
                           be at least equal in quality and performance as that
                           which SWBT provides to itself. Each Network Element
                           will be provided in accordance with SWBT Technical
                           Publications or other written descriptions, if any,
                           as changed from time to time by SWBT at its sole
                           discretion. LSP may request, and SWBT will provide,
                           to the extent technically feasible, Network Elements
                           that are superior or lesser in quality than SWBT
                           provides to itself and such service will be requested
                           pursuant to the Bona Fide Request process.

                  2.       Nothing in this Agreement will limit either Party's  
                           ability to modify its network through the
                           incorporation of new equipment, new software or
                           otherwise. Each Party will provide the other Party
                           written notice of any such upgrades in its network
                           which will materially impact the other Party's
                           service consistent with the timelines established by
                           the FCC in the Second Report and Order, CC Docket
                           96-98. LSP will be solely responsible, at its own




<PAGE>   268
                                                                    APPENDIX UNE
                                                                    Page 5 of 16

                           expense, for the overall design of its
                           telecommunications services and for any redesigning
                           or rearrangement of its telecommunications services
                           which may be required because of changes in
                           facilities, operations or procedure of SWBT, minimum
                           network protection criteria, or operating or
                           maintenance characteristics of the facilities.

         R.       LSP will connect equipment and facilities that are compatible
                  with the SWBT Network Elements and will use Network Elements
                  in accordance with the applicable regulatory standards and
                  requirements referenced in paragraph II, Q.

III.     Bona Fide Request

         A.       Sections IV - XI below identify specific unbundled Network
                  Elements and provide the terms and conditions on which SWBT
                  will offer them to LSP. Any request by LSP for an additional
                  unbundled Network Element, or modifications to previously
                  identified Network Elements, both to the extent technically
                  feasible, will be considered under this Bona Fide Request
                  process. Where facilities and equipment are not available, LSP
                  may request and SWBT may agree to provide, Network Elements
                  through the Bona Fide Request process.

         B.       Each Party will promptly consider and analyze access to new
                  unbundled Network Element with the submission of a Network
                  Element Bona Fide Request hereunder. The Network Element Bona
                  Fide Request process set forth herein does not apply to those
                  services requested pursuant to Report & Order and Notice of
                  Proposed Rulemaking 91-141 (rel. Oct. 19, 1992) paragraph 259
                  and n. 603 and subsequent rulings.

         C.       A Network Element Bona Fide Request will be submitted in
                  writing and will include a technical description of each
                  requested Network Element, the date when interconnection is
                  requested and the projected quantity of interconnection points
                  ordered with a demand forecast.

         D.       The requesting Party may cancel a Network Element Bona Fide
                  Request at any time, but will pay the other Party's reasonable
                  and demonstrable costs of processing and/or implementing the
                  Network Element Bona Fide Request up to the date of
                  cancellation.

         E.       Within ten (10) business days of its receipt, the receiving
                  Party will acknowledge receipt of the Network Element Bona
                  Fide Request.

         F.       Except under extraordinary circumstances, within thirty (30)
                  days of its receipt of a Network Element Bona Fide Request,
                  the receiving Party will provide to the requesting Party a
                  preliminary analysis of such Network Element Bona Fide
                  Request. The preliminary analysis will confirm that the
                  receiving Party will offer access to the Network Element or
                  will provide a detailed explanation that access to the Network
                  Element is not 



<PAGE>   269
                                                                    APPENDIX UNE
                                                                    Page 6 of 16

                  technically feasible and/or that the request does not qualify
                  as a Network Element that is required to be provided under the
                  Act.

         G.       If the receiving Party determines that the Network Element
                  Bona Fide Request is technically feasible and otherwise
                  qualifies under the Act, it will promptly proceed with
                  developing the Network Element Bona Fide Request upon receipt
                  of written authorization from the requesting Party. When it
                  receives such authorization, the receiving Party shall
                  promptly develop the requested services, determine their
                  availability, calculate the applicable prices and establish
                  installation intervals.

         H.       Unless the Parties otherwise agree, the Network Element Bona
                  Fide Request must be priced in accordance with Section 252(d)
                  (1) of the Act.

         I.       As soon as feasible, but not more than ninety (90) days after
                  its receipt of authorization to proceed with developing the
                  Network Element Bona Fide Request, the receiving Party shall
                  provide to the requesting Party a Network Element Bona Fide
                  Request quote which will include, at a minimum, a description
                  of each Network Element, the availability, the applicable
                  rates and the installation intervals.

         J.       Within thirty (30) days of its receipt of the Network Element
                  Bona Fide Request quote, the requesting Party must either
                  confirm its order for the Network Element Bona Fide Request
                  pursuant to the Network Element Bona Fide Request quote or
                  seek arbitration by the Commission pursuant to Section 252 of
                  the Act.

         K        If a Party to a Network Element Bona Fide Request believes
                  that the other Party is not requesting, negotiating or
                  processing the Network Element Bona Fide Request in good
                  faith, or disputes a determination, or price or cost quote,
                  such Party may seek mediation or arbitration by the Commission
                  pursuant to Section 252 of the Act.

IV.      Network Interface Device

         A.       The Network Interface Device (NID) is a cross-connect used to
                  connect loop facilities to inside wiring. The fundamental
                  function of the NID is to establish the official network
                  demarcation point between a carrier and its end-user customer.
                  The NID contains the appropriate and accessible connection
                  points or posts to which the service provider and the end-user
                  customer each make its connections.

         B.       LSP may connect to the customer's inside wire at the SWBT NID,
                  as is, at no charge. Any repairs, upgrade and rearrangements
                  required by LSP will be performed by SWBT based on time and
                  material charges.

         C.       LSP will provide its own NID and will interface to the
                  customer's premises wiring through connections in the customer
                  chamber of the SWBT NID.


<PAGE>   270
                                                                    APPENDIX UNE
                                                                    Page 7 of 16


         D.       With respect to multiple dwelling units or multiple-unit
                  business premises, LSP will provide its own NID, will connect
                  directly with the customer's inside wire and will not require
                  any connection to the SWBT NID, unless such premises are
                  served by "single subscriber" type NIDs.

         E.       The SWBT NIDs that LSP uses under this Appendix will be those
                  installed by SWBT to serve its customers.

         F.       LSP will not attach to or disconnect SWBT's ground. LSP will
                  not cut or disconnect SWBT's loop from its protector. LSP will
                  not cut any other leads in the NID. LSP will protect all
                  disconnected leads with plastic sleeves and will store them
                  within the NID enclosure. LSP will tighten all screws or lugs
                  loosened by LSP in the NID's enclosure and replace all
                  protective covers.

V.       Local Loop

         A.       A "loop" is a dedicated transmission facility between a
                  distribution frame (or its equivalent) in a SWBT central
                  office and an end user customer premises.

         B.       SWBT will provide at the rates, terms, and conditions set out
                  in Appendix Pricing Schedule the following:

                  1.       The 2-Wire analog loop supports analog voice
                           frequency, voice band services with loop start
                           signaling within the frequency spectrum of
                           approximately 300 Hz and 3000 Hz

                  2.       SWBT will offer 5 dB conditioning on a 2-wire analog
                           loop as the standard conditioning option available.

                  3.       The 4-Wire analog loop provides a non-signaling voice
                           band frequency spectrum of approximately 300 Hz to
                           3000 Hz. The 4-Wire analog loop provides separate
                           transmit and receive paths.

                  4.       The 2-Wire digital loop 160 Kbps supports Basic Rate
                           ISDN (BRI) digital exchange services. The 2-Wire
                           digital loop 160 Kbps supports usable bandwidth up to
                           160 Kbps.

                  5.       The 4-Wire digital loop 1.544 Mbps will support DS1
                           service including Primary Rate ISDN (PRI). The 4-wire
                           digital loop 1.544 Mbps supports usable bandwidth up
                           to 1.544 Mbps.

         C.       If LSP requests one or more unbundled Loops serviced by
                  Integrated Digital Loop Carrier (IDLC) or Remote Switching
                  technology, SWBT will, where available, move the requested
                  unbundled Loop(s) to a spare, existing physical or a universal
                  digital loop carrier unbundled Loop at no additional charge to
                  LSP. If, however, no spare unbundled Loop is available, SWBT
                  will within two business days, excluding weekends and
                  holidays, of LSP's request notify LSP of the lack of 



<PAGE>   271
                                                                    APPENDIX UNE
                                                                    Page 8 of 16

                  available facilities. LSP may request alternative arrangements
                  through the Bona Fide Request process.

         D.       In addition to any liability provisions in this agreement,
                  SWBT does not guarantee or make any warranty with respect to
                  unbundled loops when used in an explosive atmosphere. LSP will
                  indemnify, defend and hold SWBT harmless from any and all
                  claims by any person relating to LSP's or LSP end user's use
                  of unbundled loops in an explosive atmosphere.

VI.      Local Switching

         A.       The local switching element encompasses line-side and trunk 
                  side facilities plus the features, functions and capabilities
                  of the switch. The line side facilities include the connection
                  between a loop termination at, for example, a main
                  distribution frame (MDF), and a switch line card. Trunk-side
                  facilities include the connection between, for example, trunk
                  termination at a trunk-side cross-connect panel and a trunk
                  card. The local switching element includes all features,
                  functions, and capabilities of the local switch, including but
                  not limited to the basic switching function of connecting
                  lines to lines, lines to trunks, trunks to lines and trunks to
                  trunks. It also includes the same basic capabilities that are
                  available to SWBT customers, such as a telephone number, dial
                  tone, signaling and access to 911, operator services,
                  directory assistance, and features and functions necessary to
                  provide services required by law. In addition, the local
                  switching element includes all vertical features that the
                  switch is capable of providing, including custom calling,
                  CLASS features, and centrex-like capabilities.

         B.       SWBT will route InterLATA calls as defined by the exchange
                  dialing plan via the existing PIC process when LSP uses Local
                  Switching elements. Until such time that the commission
                  mandates intraLATA presubscription, SWBT will route IntraLATA
                  Toll calls as defined by the exchange dialing plan when LSP
                  uses Local Switching elements and will provide intraLATA toll
                  to LSP without other usage sensitive charges. When the
                  commission mandates intraLATA presubscription, SWBT will route
                  IntraLATA Toll calls to the presubscribed carrier.

         C.       When LSP requests Unbundled Common Transport, SWBT's Local
                  Switching element will route local calls on SWBT's common
                  network to the appropriate trunk or lines for call origination
                  or termination.

         D.       SWBT will provide the Local Switching element only with
                  standard central office treatments (e.g., busy tones, vacant
                  codes, fast busy, etc.), supervision and announcements.

         E.       SWBT will control congestion points such as those caused by
                  radio station call-ins, and network routing abnormalities,
                  using capabilities such as Automatic Call Gapping, Automatic
                  Code Gapping, Automatic 


<PAGE>   272
                                                                    APPENDIX UNE
                                                                    Page 9 of 16


                  Congestion Control, and Network Routing Overflow. LSP agrees
                  to respond to SWBT's notifications regarding network
                  congestion.

         F.       SWBT will provide switch interfaces to adjuncts in the same
                  manner it provides them to itself. LSP requests for use of
                  SWBT adjuncts will be handled through the Bona Fide Request
                  process.

         G.       SWBT will allow LSP to designate the features and functions
                  that are activated on a particular unbundled switch port to
                  the extent such features and functions are available or as may
                  be requested by the Bona Fide Request process.

         H.       Switch Ports

                  1.       Analog Line Port: A line side switch connection
                           available in either a loop or ground start signaling
                           configuration used primarily for Switched voice
                           communications.

                  2.       Analog (DID) Trunk Port: A trunk side switch
                           connection used for voice communications via customer
                           premises equipment primarily provided by a Private
                           Branch Exchange (PBX) switch.

                  3.       ISDN Basic Rate Interface (BRI) Port: A line side
                           switch connection which provides ISDN Basic Rate
                           Interface (BRI) based capabilities.

                  4.       ISDN Primary Rate Interface (PRI) Trunk Side Port:
                           trunk side switch connection which provides Primary
                           Rate Interface (PRI) ISDN Exchange Service
                           capabilities.

VII.     Tandem Switching

         A.       Tandem Switching is defined as: (1) trunk-connect facilities,
                  including but not limited to the connection between trunk
                  termination at a cross-connect panel and a switch trunk card,
                  (2) the basic switching function of connecting trunks to
                  trunks; and (3) all technically feasible functions that are
                  centralized in tandem switches (as distinguished from separate
                  end-office switches), including but not limited to call
                  recording, the routing of calls to operator services, and
                  signaling conversion features.

         B.       Tandem Switching will provide trunk to trunk connections for
                  local calls between two end offices.

         C.       To the extent all signaling is SS7, Tandem Switching will
                  preserve CLASS/LASS features and Caller ID as traffic is
                  processed. Additional signaling information and requirements
                  are provided in Section IX.

VIII.    Interoffice Transport

         A.       The Interoffice Transport network element is defined as SWBT
                  interoffice transmission facilities dedicated to a particular
                  customer or carrier, or shared by more than one customer or
                  carrier, that provide 


<PAGE>   273
                                                                    APPENDIX UNE
                                                                   Page 10 of 16


                  telecommunications between wire centers owned by SWBT or LSP,
                  or between switches owned by SWBT or LSP. Interoffice
                  Transport includes Common Transport and Dedicated Transport.

         B.       SWBT will be responsible for the engineering, provisioning,
                  and maintenance of the underlying equipment and facilities
                  that are used to provide Interoffice Transport.

         C.       Common Transport - Common Transport is a shared interoffice
                  transmission path between SWBT switches. Common Transport will
                  permit LSP to connect its Unbundled Local Switching element
                  purchased from SWBT with Common Transport to transport the
                  local call dialed by the Unbundled Local Switching element to
                  its destination through the use of SWBT's common transport
                  network. Common Transport will also permit LSP to utilize
                  SWBT's common network between a SWBT tandem and a SWBT end
                  office.

         D.       Dedicated Transport

                  1.       Dedicated Transport is an interoffice transmission
                           path dedicated to a particular customer or carrier
                           that provides telecommunications between wire centers
                           owned by SWBT or LSP, or between switches owned by
                           SWBT or LSP.

                  2.       SWBT will offer Dedicated Transport as a circuit 
                           (e.g., DS1, DS3) dedicated to LSP.

                  3.       SWBT will provide Dedicated Transport at the
                           following speeds: DS1 (1.544 Mbps), DS3 (45 Mbps),
                           OC3 (155.520 Mbps) and OC12 (622.080 Mbps). In
                           addition, SWBT offers OC48 (2488.320 Mbps) bandwidth
                           as an option for interoffice capacity.

                  4.       In addition to any liability provisions in this
                           agreement, SWBT does not guarantee or make any
                           warranty with respect to entrance facilities when
                           used in an explosive atmosphere. LSP will indemnify,
                           defend and hold SWBT harmless from any and all claims
                           by any person relating to LSP's or LSP end user's use
                           of unbundled loops in an explosive atmosphere.

         E.       Digital Cross-Connect System (DCS) - SWBT will offer Digital
                  Cross-Connect System (DCS) in conjunction with the unbundled
                  dedicated transport element with the same functionality that
                  is offered to interexchange carriers.

IX.      Signaling Networks and Call-Related Databases - Signaling Networks and
         Call-Related Databases are Network Elements that includes Signaling
         Link Transport, Signaling Transfer Points, and Service Control Points
         and Call-Related Databases. Access to SWBT's signaling network and call
         related databases will be provided as described in the following
         Appendices: SS7, LIDB Validation, LIDB, CNAM, 800, and AIN.



<PAGE>   274
                                                                    APPENDIX UNE
                                                                   Page 11 of 16


X.       Operations Support Systems Functions

         A.       Operations Support Systems Functions consist of pre-ordering,
                  ordering, provisioning, maintenance and repair, and billing
                  functions supported by SWBT's databases and information.

         B.       SWBT will provide LSP access to its Operations Support Systems
                  Functions as outlined in Appendix OSS.

XI.      Cross Connects

         A.       The cross connect is the media between the SWBT distribution
                  frame and an LSP designated collocation or to other SWBT
                  unbundled network elements purchased by LSP.

         B.       SWBT offers a choice of four types of cross connects with each
                  unbundled loop type. The applicable cross connects are as
                  follows:

                  1.       Cross connect to DCS
                  2.       Cross connect to MUX
                  3.       Cross connect to Collocation
                  4.       Cross connect to Switch Port

         C.       Cross connects must also be ordered with Unbundled Dedicated
                  Transport (UDT).

                  1.       The LSP must specify when placing an UDT order, in
                           what order the unbundled network components are to be
                           connected.

                  2.       The Cross Connect being requested must have a
                           compatible interface to each of the elements which
                           the Cross Connect is joining together.

                  3.       The following cross connects are available with UDT:

                           a)       Voice Grade 2-Wire
                           b)       Voice Grade 4-Wire
                           c)       DS0 - DCS to Collocation
                           d)       DS1
                           e)       DS3
                           f)       OC3
                           g)       OC12
                           h)       OC48

XII.     Pricing

         A.       Attached hereto as Appendix Pricing Schedule is a schedule
                  which reflects the prices at which SWBT agrees to furnish
                  Unbundled Network Elements to LSP. LSP agrees to compensate
                  SWBT for unbundled Network elements at the rates contained in
                  this Appendix. Unbundled Network Elements are available from
                  SWBT on a per unbundled Network Element basis at prices as
                  contained in Appendix Pricing Schedule.


<PAGE>   275
                                                                    APPENDIX UNE
                                                                   Page 12 of 16


         B.       For any rate element and/or charge contained in or referenced
                  to in this Appendix that are not listed in the attached
                  Appendix Pricing Schedule, including Bona Fide Requests, SWBT
                  and LSP will negotiate prices.

         C.       Unless otherwise stated, SWBT will render a monthly bill for
                  Network Elements provided hereunder. Remittance in full will
                  be due within thirty (30) days of receipt of invoice.
                  Interest will apply on overdue amounts.

         D.       SWBT will recover the costs of modifying its outside plant
                  facilities for LSP space requirements. These costs will be
                  recovered via the Bona Fide Request process described herein.

         E.       Recurring Charges

                  1.       Unless otherwise listed below, where Rates are shown
                           as monthly, a month will be defined as a calendar
                           month. The minimum term for each monthly rated
                           element will be one (1) month. After the initial
                           month, billing will be on the basis of whole or
                           fractional months used. The minimum service period
                           for elements provided under the Bona Fide Request
                           process may be longer.

                  2.       When an unbundled network element with a minimum
                           period greater than one month is discontinued prior
                           to the expiration of the minimum period, the
                           applicable charge will be the total monthly charges,
                           for the remainder of the minimum period.

                  3.       The minimum service period for unbundled dedicated
                           transport elements is 12 months.

                  4.       Where rates will be based on minutes of use, usage
                           will be accumulated at the end office or other
                           measurement point without any per call rounding and
                           total minutes by end office are rounded to the next
                           higher minute. LSP will pay for all usage on such
                           calls including those that are not completed due to
                           busy or don't answer conditions.

                  5.       Where rates are based on miles, the mileage will be
                           calculated on the airline distance involved between
                           the locations. To determine the rate to be billed,
                           SWBT will first compute the mileage using the V&H
                           coordinates method, as set forth in the National
                           Exchange Carrier Association, Inc. Tariff F.C.C. No
                           4. When the calculation results in a fraction of a
                           mile, SWBT will round up to the next whole mile
                           before determining the mileage and applying rates.

         F.       Non-Recurring Charges

                  1.       There are non-recurring charges for the first
                           connection on an LSP order as well as separate
                           non-recurring charges for each additional connection
                           associated with the same LSP order at the same LSP



<PAGE>   276
                                                                    APPENDIX UNE
                                                                   Page 13 of 16


                           specified premises. When converting the SWBT account
                           to LSP or between LSP and another local service
                           provider, the conversion will be handled as a
                           disconnect of the current account and a new connect
                           of the unbundled network element account.

                  2.       LSP will pay a non-recurring charge when an LSP adds
                           or removes a signaling point code. The rates and
                           charges for Signaling Point Code(s) are identified in
                           the Pricing Schedule. This charge also applies to
                           point code information provided by LSP allowing other
                           telecommunications providers to use LSP's SS7
                           signaling network.

                  3.       A service order processing (Service Order) charge
                           will apply for each service order issued by SWBT to
                           process a request for installation, disconnection,
                           rearrangement, changes to or record orders for
                           unbundled elements.

         G.       Maintenance of Elements

                  1.       The network elements provided by SWBT pursuant to
                           this Appendix will be maintained by SWBT. LSP or
                           others may not rearrange, move, disconnect, remove or
                           attempt to repair any facilities provided by SWBT,
                           other than by connection or disconnection to any
                           interface means used, except with the written consent
                           of SWBT.

                  2.       If trouble occurs with unbundled network elements
                           provided by SWBT, LSP will first determine whether
                           the trouble is in LSP's own equipment and/or
                           facilities or those of the end user. If LSP
                           determines the trouble is in SWBT's equipment and/or
                           facilities, LSP will issue a trouble report to SWBT.

                  3.       LSP will pay Time and Material charges when LSP
                           reports a suspected failure of a network element and
                           SWBT dispatches personnel to the end user's premises
                           or a SWBT central office and trouble was not caused
                           by SWBT's facilities or equipment. Time and Material
                           charges will include all technicians dispatched,
                           including technicians dispatched to other locations
                           for purposes of testing.

                  4.       LSP will pay Time and Material charges when SWBT
                           dispatches personnel and the trouble is in equipment
                           or communications systems provided an entity by other
                           than SWBT or in detariffed CPE provided by SWBT,
                           unless covered under a separate maintenance
                           agreement.

                  5.       If LSP issues a trouble report allowing SWBT access
                           to the end user's premises and SWBT personnel are
                           dispatched but denied access to the premises, then
                           Time and Material charges will apply 



<PAGE>   277
                                                                    APPENDIX UNE
                                                                   Page 14 of 16


                           for the period of time that SWBT personnel are
                           dispatched. Subsequently, if SWBT personnel are
                           allowed access to the premises, the charges discussed
                           herein will still apply.

                  6.       Time and Material charges apply on a first and 
                           additional basis for each half hour or fraction
                           thereof. If more than one technician is dispatched in
                           conjunction with the same trouble report, the total
                           time for all technicians dispatched will be
                           aggregated prior to the distribution of time between
                           the "First Half Hour or Fraction Thereof" and "Each
                           Additional Half Hour or Fraction Thereof" rate
                           categories. Basic Time is work related efforts of
                           SWBT performed during normally scheduled working
                           hours on a normally scheduled work day. Overtime is
                           work related efforts of SWBT performed on a normally
                           scheduled work day, but outside of normally scheduled
                           working hours. Premium Time is work related efforts
                           of SWBT performed other than on a normally scheduled
                           work day.

                  7.       If LSP requests or approves a SWBT technician to
                           perform services in excess of or not otherwise
                           contemplated by the nonrecurring charges herein, LSP
                           will pay for any additional work to perform such
                           services, including requests for installation or
                           conversion outside of normally scheduled working
                           hours.

         H.       Other Pricing Terms and Conditions for Unbundled Local 
                  Switching (ULS)

                  1.       When LSP purchases Unbundled Local Switching, SWBT
                           will provide LSP the vertical features that the
                           switch is equipped to provide, as part of the usage
                           charges associated with ULS. LSP will pay
                           non-recurring charges to activate such features in
                           association with a particular ULS Port type. There
                           are two levels of non-recurring charges. The first
                           will apply when the features are activated at the
                           same time the port is established. A different
                           non-recurring charge applies when the feature is
                           activated subsequent to initial installation of the
                           port.

                  2.       When the NXX of the telephone number provided to LSP
                           is one associated with an optional EAS arrangement,
                           LSP will pay a flat-rated monthly port additive for
                           the optional EAS toll package(s) inherent in the
                           telephone number.

                  3.       LSP will pay the Toll Free Database query rate for
                           each query received and processed by SWBT's database.
                           When applicable, the charge for the additional
                           features (Designated 10-Digit Translation, Call
                           Validation and Call Handling and Destination) are per
                           query and in addition to the Toll Free Database query
                           charge, and will also be paid by LSP.


<PAGE>   278
                                                                    APPENDIX UNE
                                                                   Page 15 of 16

                  4.       Use of SWBT's SS7 signaling network will be provided
                           for unbundled local switching as set forth in
                           Appendix SS7. LSP does not separately order SS7 under
                           this method. LSP will be charged for the use of the
                           SWBT SS7 network on a per call basis when the SS7
                           network is used in conjunction with unbundled local
                           switching.

                  5.       With Unbundled Local Switching, SWBT will make
                           available features that require resources outside the
                           switch, but LSP will pay additional charges (e.g.,
                           TCAP messages, SS7 Signaling, database queries, etc.)
                           for such features.

                  6.       Associated with Unbundled Local Switching, LSP will
                           pay a non-recurring and a monthly recurring charge
                           for the establishment of common block for a
                           particular end user served by LSP. LSP will also pay
                           a non-recurring charge for activation of features
                           associated with individual ports and for subsequent
                           changes to features associated with individual ports.
                           These non-recurring charges are separate from the
                           service charges for service order processing.

         I.       Temporary Rate Structure for Unbundled Local Switching (ULS)

                  1.       LSP will be charged a per minute rate for each local
                           call generated by an unbundled local ULS port, when
                           both the originating and terminating telephone number
                           are in the same 11 digit CLLI end office. When LSP
                           uses a ULS port to initiate a call to a terminating
                           number associated with a different 11 digit CLLI, LSP
                           will pay a rate per minute for ULS plus a rate per
                           minute for UCT transport. The parties agree to assume
                           that SWBT's common transport network is used in this
                           latter case.

         J.       Standard Interim Structure for ULS

                  1.       Intra Switch Calls - On calls originating and 
                           terminating in the same switch:

                           a)       LSP will pay ULS-O for a call originating
                                    from an ULS line or trunk port that
                                    terminates to a SWBT end user service line
                                    or any other unbundled line or trunk port
                                    which is connected to the same end office
                                    switch.

                           b)       LSP will pay ULS-O for a centrex-like ULS
                                    intercom call in which the LSP's user dials
                                    from one centrex-like station to another
                                    centrex-like station in the same common
                                    block defined system.

                           c)       SWBT will not bill ULS-T for calls
                                    originating from a bundled line port (a line
                                    port associated with the provision 



<PAGE>   279
                                                                    APPENDIX UNE
                                                                   Page 16 of 16


                                    of resold local service by SWBT, or
                                    associated with local service to SWBT end
                                    user) and terminating to a ULS Port.

                           d)       SWBT will not bill ULS-T for Intraswitch
                                    calls originated by an unbundled ULS port
                                    even when the line to which the call is
                                    terminated is another ULS Port.

                  2.       Inter Switch Calls - On calls not originating and
                           terminating in the same switch:

                           a)       When a call originates from an ULS Port and
                                    is routed to SWBT's public network via a
                                    connection to UCT, ULS-O will apply. Charges
                                    for UCT as outlined below will also apply.

                           b)       When an InterLATA toll call is initiated
                                    from an ULS port it will be routed to the
                                    end user PIC choice. ULS-O usage charges
                                    will apply to LSP in such event.

                           c)       Until IntraLATA Dialing Parity, all
                                    intraLATA toll calls initiated by ULS Port
                                    will be routed to SWBT. The LSP will pay
                                    IntraLATA toll rates for such calls. No ULS
                                    usage charges will apply to LSP in such
                                    event.

                           d)       After IntraLATA Dialing Parity, IntraLATA
                                    toll calls from ULS Ports will be routed to
                                    the end user PIC choice. ULS-O charges will
                                    apply.

                           e)       When LSP uses ULS Ports to initiate an
                                    800/888 call, SWBT will perform the
                                    appropriate database query and route the
                                    call to the indicated IXC. No ULS-O charges
                                    will apply to the ULS Port.

                           f)       When a call that has been routed through
                                    SWBT's public network terminates to an ULS
                                    Port, from another of the same LSP's ports
                                    or another LSP's ULS Port, ULS-T charges
                                    will apply.

                           g)       When a call that has been routed through
                                    SWBT's public network terminates to an ULS
                                    Port, from the bundled local exchange
                                    service of SWBT, ULS-T charges will apply.

                           h)       When a call terminates to an ULS Port via
                                    terminating access services provided by SWBT
                                    (e.g., FGA, FGB, FGD, WATS etc.) SWBT will
                                    assess ULS-T charges.

                           i)       When a call which has been routed from
                                    another network terminates to an ULS line
                                    port, ULS-T charges will apply.
<PAGE>   280
                          UNE PRICE LIST - MISSOURI

<TABLE>
<CAPTION>
                                                                 Monthly/MOU Rates              Nonrecurring Charge
                                                                      
                                                         Zone A       Zone B       Zone C       Initial    Additional
                                                         ------       ------       ------       -------    ----------
<S>                                                   <C>          <C>          <C>            <C>        <C>
Network Interface Device (NID)
         Disconnect Loop from inside wiring, per NI         N/A          N/A          N/A       $60.40      $30.20

Unbundled Loops
         2-Wire Analog                                   $42.65       $27.10       $16.95       $53.20      $22.65
           Conditioning for dB Loss                       $6.85        $6.85        $6.85       $46.45      $17.50
         4-Wire Analog                                   $85.30       $54.20       $33.90       $53.20      $22.65
         2-wire Digital                                  $84.35       $59.70       $44.40      $117.80      $61.65
         4-wire Digital                                 $167.10      $152.15      $135.25      $278.65     $110.00

Loop Cross Connects
         Analog Loop to Collocation
              2-wire cross connect                        $2.15        $2.15        $2.15       $71.25      $67.80
              4-wire cross connect                        $4.20        $4.20        $4.20       $84.35      $80.90
         Digital Loop to Collocation
              2-wire cross connect                        $2.15        $2.15        $2.15       $71.25      $67.80
              4-wire cross connect                       $11.35       $11.35       $11.35       $84.35      $80.90
         Analog Loop to Multiplexer/Interoffice
              2-wire cross connect                        $5.05        $5.05        $5.05      $104.85      $96.35
              4-wire cross connect                        $6.80        $6.80        $6.80      $122.95     $114.45
         Digital Loop to Multiplexer/Interoffice
              2-wire cross connect                       $12.10       $12.10       $12.10      $104.85      $96.35
         Analog Loop to DCS/Switch Port
              2-wire cross connect                           NC           NC           NC           NC          NC
              4-wire cross connect                           NC           NC           NC           NC          NC
         Digital Loop to DCS/Switch Port
              2-wire cross connect                           NC           NC           NC           NC          NC
              4-wire cross connect                           NC           NC           NC           NC          NC

Local Switching
Interim Structure
     Within the Same Central Office
       Per Originating or Terminating MOU             $0.005510    $0.006728    $0.006841          N/A         N/A
     Between Different Central Offices
       Per Originating or Terminating MOU             $0.012929    $0.015253    $0.015553          N/A         N/A
Long Term Structure
       Per Originating or Terminating MOU             $0.005510    $0.006728    $0.006841          N/A         N/A

Customized Routing                                          ICB          ICB          ICB          ICB         ICB

Port Charge Per Month
         Analog Line Port                                 $3.40        $3.40        $3.40       $81.90      $73.45
         Analog Trunk Side (DID)                         $23.85       $23.85       $23.85      $140.70          --
         BRI Port                                         $6.70        $6.70        $6.70       $13.30       $7.25
         PRI Port                                       $198.70      $198.70      $198.70      $441.10     $202.60
         Feature Activation per Port Type                   ICB          ICB          ICB          ICB         ICB
         Centrex-like System Charges                        ICB          ICB          ICB          ICB         ICB
         EAS Port Additive                               $24.80       $24.80       $24.80           NA          NA

Tandem Switching
         per Minute Of Use                            $0.002795    $0.002795    $0.002795           --          --

Common Transport
         per Minute Of Use                            $0.000511    $0.000399    $0.000473           --          --

Dedicated Transport
         Entrance Facility:
         DS1                                            $148.95      $148.95      $148.95      $628.00     $456.00
         DS3                                          $1,805.00    $1,805.00    $1,805.00      $637.00     $496.00
         Interoffice Transport:
         DS1          First Mile                         $69.00       $69.00       $69.00      $408.00     $314.00

</TABLE>

                                 Page 1 of 2
<PAGE>   281
                          UNE PRICE LIST - MISSOURI

<TABLE>

<S>      <C>                                             <C>         <C>          <C>          <C>            <C>
                      Each Additional Mile                $17.70      $17.70       $17.70            N/A          N/A
         DS3          First Mile                         $933.00     $933.00      $933.00        $473.00      $341.00
                      Each Additional Mile               $118.00     $118.00      $118.00            N/A          N/A


Dedicated Transport Cross Connects
         Voice Grade 2-wire                                   NC          NC           NC             NC           NC
         Voice Grade 4-wire                                   NC          NC           NC             NC           NC
         DS0 to DCS                                           NC          NC           NC             NC           NC
         DS1                                                  NC          NC           NC             NC           NC
         DS3                                                  NC          NC           NC             NC           NC


Digital Cross-Connect System
         DCS Port Charge
         DSO                                              $12.00      $12.00       $12.00         $20.00          N/A
         DS1                                              $45.14      $45.14       $45.14         $43.00          N/A
         DS3                                             $490.05     $490.05      $490.05         $32.00          N/A
         DCS Establishment Charge                            N/A         N/A          N/A      $1,722.00          N/A
         Database Modification Charge                        N/A         N/A          N/A         $80.00          N/A
         Reconfiguration Charge                              N/A         N/A          N/A          $1.25          N/A


Service Order Charges - Unbundled Elements                Simple      Complex
         New Service                                      $60.00     $245.00
         Change                                           $58.00     $136.00
         Record                                           $36.00     $114.00
         Disconnect                                       $30.00      $65.00


                                                         Nonrecurring Charge
Maintenance of Service Charges                           Initial    Additional
         Basic Time                                       $30.93      $21.32 per 1/2 hr. or fraction thereof
         Overtime                                         $36.35      $26.73 per 1/2 hr. or fraction thereof
         Premium Time                                     $41.77      $32.15 per 1/2 hr. or fraction thereof


Time and Material Charges
         Basic Time                                       $30.93      $21.32 per 1/2 hr. or fraction thereof
         Overtime                                         $36.35      $26.73 per 1/2 hr. or fraction thereof
         Premium Time                                     $41.77      $32.15 per 1/2 hr. or fraction thereof
</TABLE>

                                  Page 2 of 2
<PAGE>   282
                                                               APPENDIX WIRELESS
                                                                     PAGE 2 0F 5
                                APPENDIX WIRELESS

This Appendix sets forth the terms and conditions under which the Parties will
distribute revenue from their joint provision of Wireless Interconnection
Service for traffic originated on a Commercial Mobile Radio Service (CMRS)
Provider's network and terminating through the Parties' respective wireline
switching networks within a Local Access and Transport Area (LATA). The Parties
will be compensated under this Appendix only to the extent that they are not
been compensated for Wireless Interconnection Service under other tariffs,
settlement agreements, contracts or other mechanism. This Appendix is subject to
the terms and conditions of applicable tariffs.

1.0      Definitions

         1.1.     Wireless Interconnection Service - The interchange of traffic
                  originated from a Commercial Mobile Radio Service (CMRS)
                  Provider's Mobile Telephone Switching Office (MTSO) through
                  SWBT's or the LSP's point of switching for termination on the
                  relevant Party's wireline switching network.

         1.2.     Commercial Mobile Radio Service (CMRS) Provider - A radio
                  common carrier provider of domestic public cellular
                  telecommunication service, as defined in Part 22, Part 24, or
                  Part 90 of the FCC Rules and Regulations.

         1.3.     End Office - SWBT or LSP switching system where exchange
                  service customer station loops are terminated for the purpose
                  of interconnection to each other and to the network.

         1.4.     Local Access and Transport Area ("LATA") - A geographic area
                  marking the boundaries beyond which a Bell Operating Company
                  formerly could not carry telephone calls pursuant to the terms
                  of the Modification of Final Judgment (MFJ), U.S. vs. American
                  Tel. & Tel. Co., 552 F.Supp. 131 (D.D.C. 1983), affirmed sub
                  nom. Maryland v. United States, 460 U.S. 1001 (1983).

         1.5.     Local Calling Area or Local Calling Scope - That area in which
                  the message telephone exchange service between two or more end
                  offices, without a toll charge, is provided.

         1.6.     Minutes of Use (MOU) - For the purposes of this Appendix, MOU
                  means the Terminating Traffic as recorded by the Primary
                  Company or MOU provided by the CMRS Provider to the Primary
                  Company where the Primary Company is unable to measure the
                  actual terminating usage.

         1.7.     Mobile Telephone Switching Office ("MTSO") - A CMRS Provider's
                  switching equipment or terminal used to provide CMRS
                  Provider's switching services or,


<PAGE>   283


                                                               APPENDIX WIRELESS
                                                                     PAGE 3 0F 5


                  alternatively, any other point of termination designated by
                  the CMRS Provider. The MTSO directly connects the CMRS
                  Provider's customers within its licensed serving area to the
                  Primary Company's facilities.

         1.8.     Primary Company - The Party that provides the End Office or
                  Tandem Office where the CMRS Provider chooses to connect
                  terminating traffic. The Primary Company also bills the CMRS
                  Provider for Wireless Interconnection Service.

         1.9.     Revenues - Those monies the Primary Company bills and collects
                  from the CMRS Provider for jointly provided Wireless
                  Interconnection Service.

         1.10.    Secondary Company - The Party that receives Terminating
                  Traffic from the Primary Company.

         1.11.    Tandem Office - A Party's switching system that provides an
                  intermediate switching point for traffic between end offices
                  or the network.

         1.12.    Terminating Traffic - That traffic which is delivered by a
                  CMRS Provider to the Primary Company for termination at a
                  point on the intraLATA wireline switching network.

2.0      ADMINISTRATION OF REVENUE DISTRIBUTION

         2.1.     The Primary Company will compute, bill, collect and distribute
                  the revenue for jointly provided Wireless Interconnection
                  Service for calls terminating within a LATA. On jointly
                  provided Wireless Interconnection Service, the Primary Company
                  will distribute a portion of the Local Transport (LT) Revenues
                  as described below with the Secondary Company for its part in
                  terminating traffic from the CMRS Provider. The Primary
                  Company will distribute applicable Local Switching (LS) and
                  Carrier Common Line (CCL) charges which are collected from the
                  CMRS Provider to the Secondary Company, as described below.

         2.2.     Distribution of revenues will be computed using the rate
                  elements as defined in SWBT's applicable Wireless
                  Interconnection Tariff.

         2.3.     For terminating traffic, actual monthly wireless MOU will be
                  measured by the Primary Company for each office in the LATA or
                  provided to the Primary Company by the CMRS Provider in those
                  cases where the Primary Company is unable to measure the
                  actual terminating usage.


         2.4.     Each month, the amount of CCL and LS revenue (based on the
                  rates in the Primary Company's applicable tariffs) due the
                  Secondary Company from the Primary Company will be determined
                  by totaling the actual terminating MOU associated with each of
                  the Secondary Company's end offices and multiplying those MOU
                  by the appropriate rates as set out above. The LT revenues due
                  to the 




<PAGE>   284
                                                               APPENDIX WIRELESS
                                                                     PAGE 4 0F 5




                  Secondary Company will be determined for each Secondary
                  Company end office by multiplying the billed MOU by the
                  appropriate LT rate multiplied by the applicable end office
                  percentage ownership of facilities listed in Exhibit A to this
                  Appendix.

         2.5.     The Primary Company will prepare a revenue and usage statement
                  on a monthly basis. Within 90 calendar days after the end of
                  each billing period, except in cases of disputes, the Primary
                  Company will remit the compensation amount due the Secondary
                  Company. When more than one compensation amount is due, they
                  may be combined into a single payment. No distribution will be
                  made for the revenue the Primary Company is unable to collect.

         2.6.     The revenue and usage statement will contain the following
                  information:

                             2.6.1. The number of MOU for each of the Secondary
                        Company's end offices, the corresponding rate elements
                        to be applied to the MOUs for each end office, and the
                        resulting revenues;

                             2.6.2. The total of the MOU and revenues for the
                        Secondary Company;

                             2.6.3. The percent ownership factor used to
                        calculate the distribution of Local Transport revenues;
                        and,

                             2.6.4. Adjustments for uncollectibles.

         2.7.     The Parties agree that revenue distribution under this
                  Appendix will apply as of the effective date of the Agreement.
                  The Primary Company will start revenue distribution on usage
                  within 60 calendar days from the date this Appendix is
                  effective.

3.0      TERMINATION PROVISIONS

         3.1.     This Appendix shall remain in effect until terminated by
                  either Party upon a minimum of 30 calendar days written notice
                  by such Party to the designated representative of the other.

         3.2.     This Appendix may be terminated by an order of an appropriate
                  regulatory commission or a court of competent jurisdiction.

4.0      MISCELLANEOUS PROVISIONS

         4.1.     Exhibit A to this Appendix is attached and incorporated into
                  this Appendix by reference. From time to time, by written
                  agreement of both parties, new Exhibits 






<PAGE>   285


                                                               APPENDIX WIRELESS
                                                                      PAGE 5 OF5

                  may be substituted for the attached Exhibit A, superseding and
                  canceling the Exhibit A previously in effect.

         4.2.     Each party will promptly upon request, furnish to the other
                  such information as may reasonably be required to perform
                  under this Appendix.

5.0      NOTICE

         5.1.     In the event any notices are required under the terms of this
                  Appendix, they shall be sent by registered mail, return
                  receipt requested to:

                           if to SWBT                Jeff Fields

                           if to LSP                 Richard Weinstein



<PAGE>   286

                                                               APPENDIX WIRELESS
                                                                       EXHIBIT A
                                                                     PAGE 1 OF 1

                         EXHIBIT A TO APPENDIX WIRELESS

           END OFFICE PERCENT OWNERSHIP OF LOCAL TRANSPORT FACILITIES


CLLI CODE                          NPA-NXX           % OWNERSHIP OF TRANSPORT
FACILITIES


<PAGE>   287

                                                                     APPENDIX WP
                                                                     PAGE 2 OF 5


                                   APPENDIX WP

                         WHITE PAGES DIRECTORY APPENDIX

SWBT and LSP agree to the following terms and conditions for the printing and
distribution of White Pages directories:

1.       SWBT publishes White Pages directories for geographic areas in which
         LSP also provides local exchange telephone service, and LSP wishes to
         include listings information for its end users in the appropriate SWBT
         White Pages directories.

2.       LSP also desires distribution to its end users of the White Pages
         directories that include listings of LSP's end users.

3.       NOW THEREFORE, in consideration of these premises, SWBT and LSP agree
         as follows:

I.       SERVICE PROVIDED

         A.       Subject to SWBT's practices, as well as the rules and
                  regulations applicable to the provision of White Pages
                  directories, SWBT will include in appropriate White Pages
                  directories the primary alphabetical listings of all LSP end
                  users located within the local directory scope. The rules,
                  regulations and SWBT practices are subject to change from time
                  to time.

         B.       Prior to the issuance of a particular directory and at such
                  time or times as may be mutually agreed, the LSP shall furnish
                  to SWBT, in a form acceptable to both Parties, subscriber
                  listing information pertaining to LSP end users located within
                  the local directory scope, along with such additional
                  information as SWBT may require to prepare and print the
                  alphabetical listings of said directory.

         C.       LSP may provide LSP's subscriber listing information to SWBT
                  for inclusion in the White Pages directory via either a
                  mechanical or manual feed of the listing information to SWBT's
                  listing database or the LSP may choose to provide listings in
                  the form of camera ready copy.

         D.       If LSP provides its subscriber listing information to SWBT via
                  a mechanical or manual feed such listings are to be
                  alphabetically interfiled (interspersed) in the SWBT directory
                  among SWBT subscriber listings. If LSP provides its subscriber
                  listing information to SWBT in the form of camera ready copy,
                  SWBT will include such listings as a separate section of the
                  White Pages directory included in a separate section of the
                  SWBT White Pages directory.



<PAGE>   288
                                                                     APPENDIX WP
                                                                     PAGE 3 OF 5



         E.       Sixty (60) days prior to the business office close date for a
                  particular directory, SWBT shall provide LSP a verification
                  list of its subscriber listings, as such listings are to
                  appear in the directory. The verification list shall also
                  include Directory Delivery Address information for each LSP
                  end user. LSP shall review this verification list and shall
                  submit to SWBT any necessary additions, deletions or
                  modifications within thirty (30) days of receipt of the list
                  from SWBT.

         F.       If LSP provides its subscriber listing information to SWBT in
                  the form of camera ready copy. SWBT shall provide LSP sixty
                  (60) days written notice of the date by which LSP must provide
                  this information to SWBT.

         G.       Sixty (60) days prior to the directory close, LSP shall
                  provide to SWBT written specification of the total number of
                  directories that it will require, along with the number of
                  directory(ies) that each LSP end user will require. SWBT will
                  provide one (1) copy of the directory to LSP end users, unless
                  otherwise instructed by the LSP.

         H.       At LSP's request, SWBT will include LSP specific information
                  (i.e., business office, residence office, repair bureau, etc.)
                  in the White Pages directory on an "index-type" informational
                  page. This page will also include specific information
                  pertaining to other LSPs. At its option, LSP shall provide
                  SWBT with its logo and information in the form of a camera
                  ready copy, sized at 1/8th of a page.

         I.       At its request, LSP may purchase "Informational Page(s)" in
                  the informational section of the White Pages directory
                  covering a geographic area. Such page(s) shall be no different
                  in style, size, color and format than SWBT "Informational
                  Pages". Sixty (60) days prior to the directory close date, the
                  LSP shall provide to SWBT the "Informational Page" in the form
                  of camera- ready copy.

II.      USE OF SUBSCRIBER LISTING INFORMATION

         A.       LSP authorizes SWBT to use the subscriber listing information
                  provided to SWBT pursuant to this Appendix for the sole
                  purpose of including the listings in the appropriate printed
                  White Pages directory and directory assistance databases where
                  such service is provided by SWBT.

         B.       At LSP's request, SWBT shall transmit LSP's end user listing
                  information to designated third party directory publishers
                  (limited to publishers that SWBT transmits its own listing
                  information) for a one-time administrative fee of $100.00 per
                  occurrence, per directory publisher.


<PAGE>   289



                                                                     APPENDIX WP
                                                                     PAGE 4 OF 5

III.     PRICING

         A.       The rates for the services described herein are identified on
                  Exhibit I. If LSP provides its subscriber listing information
                  to SWBT via a mechanical or manual feed of the listings to
                  SWBT's listings database, SWBT will assess per book copy, per
                  subscriber line, charge when directories are delivered to LSP
                  end user premises, or an annual, per book copy charge when
                  delivered in bulk to LSP. Included in this rate, LSP will
                  receive for its end user, one single listing in SWBT's White
                  Page directory, and one copy of the directory delivered to
                  either its end user's premises, or in bulk to the LSP
                  location.

         B.       Where an LSP end user requires additional listings to appear
                  in the White Pages directory, SWBT will assess LSP an annual
                  charge for such listings at existing SWBT tariff rates.

         C.       For any "Subsequent" directory orders (orders placed after the
                  initial order/forecast is provided - see I. G. above), SWBT
                  shall charge LSP a per book copy charge. This rate applies,
                  per book copy, when such directories are delivered in bulk to
                  LSP or to the LSP's end user premises.

         D.       For inclusion of the LSP "Informational Page" in the White
                  Pages directory, SWBT shall charge the LSP an annual fee for
                  inclusion in the Metropolitan area book.

IV.      ASSIGNMENT

         The subscriber listing information shall remain the property of LSP.
         Except as stated in Section II herein, SWBT shall not sublicense,
         assign, sell or transfer the subscriber listing information provided
         hereunder, nor shall SWBT authorize any other company or any person to
         use the subscriber listing information for any other purpose. SWBT
         shall take appropriate measures to guard against any unauthorized use
         of the listings provided to it hereunder (at least the same measures
         SWBT takes to protect its own listings from unauthorized use), whether
         by SWBT, its agents, employees or others.

V.       LIABILITY

         A.       LSP hereby releases SWBT from any and all liability for
                  damages due to errors or omissions in LSP's subscriber listing
                  information as provided to SWBT under this Appendix, and/or
                  LSP's subscriber listing information as it appears in the
                  White Pages directory, including, but not limited to, special,
                  indirect, consequential, punitive or incidental damages.

         B.       LSP shall indemnify, protect, save harmless and defend SWBT
                  (or SWBT's officers, employees, agents, assigns and
                  representatives) from and against any and all losses,
                  liability, damages and expense arising out of any demand,
                  claim, suit or 



<PAGE>   290



                                                                     APPENDIX WP
                                                                     PAGE 5 OF 5


                  judgment by a third party in any way related to any error or
                  omission in LSP's subscriber listing information as it appears
                  in the White Pages directory, including any error or omission
                  related to non-published or non-listed subscriber listing
                  information. LSP shall so indemnify regardless of whether the
                  demand, claim or suit by the third party is brought jointly
                  against LSP and SWBT, and/or against SWBT alone. However, if
                  such demand, claim or suit specifically alleges that an error
                  or omission appears in LSP's subscriber listing information in
                  the White Pages directory, SWBT may, at its option, assume and
                  undertake its own defense, or assist in the defense of the
                  LSP, in which event the LSP shall reimburse SWBT for
                  reasonable attorney's fees and other expenses incurred by SWBT
                  in handling and defending such demand, claim and/or suit.

         C.       This Appendix shall not establish, be interpreted as
                  establishing, or be used by either party to establish or to
                  represent their relationship as any form of agency,
                  partnership or joint venture. Neither Party shall have any
                  authority to bind the other or to act as an agent for the
                  other unless written authority, separate from this Appendix,
                  is provided. Nothing in the Appendix shall be construed as
                  providing for the sharing of profits or losses arising out of
                  the efforts of either or both of the Parties. Nothing herein
                  shall be construed as making either Party responsible or
                  liable for the obligations and undertakings of the other
                  Party.

VI.      BREACH OF CONTRACT

         If either Party is found to have materially breached this Appendix, the
         non-breaching Party may terminate the Appendix by providing written
         notice to the breaching party, whereupon this Appendix shall be null
         and void with respect to any issue of SWBT's White Pages directory
         published sixty (60) or more days after the date of receipt of such
         written notice.

VIII.    TERM

         A.       This Appendix shall continue in force for one (1) until
                  terminated by sixty (60) days prior written notice by either
                  Party to the other. Upon termination, SWBT shall cease using,
                  for any purpose whatsoever, the subscriber listing information
                  provided hereunder by LSP, and shall promptly return such
                  subscriber listing information to the LSP.

         B.       Upon termination of the interconnection Agreement, this
                  Appendix will be null and void with respect to any issue of
                  directories published thereafter, except that the
                  indemnification provided by Section V herein shall continue
                  with respect to any directory published within sixty (60) days
                  of termination.



<PAGE>   291


                                                                     APPENDIX WP
                                                                       EXHIBIT I
                                                                     PAGE 1 OF 1


                                   APPENDIX WP
                                    EXHIBIT I
                                   PRICE LIST


<TABLE>
<CAPTION>


- ------------------------ ---------------------- ---------------------- ----------------------- ----------------------
       Directory            Price Per Book         Price Per Book         Price Per Single        Price Per Book
                                 Copy                   Copy                   Sided               Copy(1) Ordered
                             Delivered in           Delivered to           Informational           After Initial
                                 Bulk               LSP End User                Page                   Order
                                to LSP
- ------------------------ ---------------------- ---------------------- ----------------------- ----------------------
<S>                              <C>                    <C>                  <C>                      <C>   
  Kansas City                    $4.46                  $6.48                $3,191.73                $10.00
  Springfield                    $4.46                  $6.48                $3,191.73                $10.00
  St. Louis                      $4.46                  $6.48                $3,191.73                $10.00
- ------------------------ ---------------------- ---------------------- ----------------------- ----------------------

</TABLE>

- ------------------------
(1)    Subject To Availability

<PAGE>   292

                                                                     APPENDIX TP
                                                                     PAGE 2 OF 2


                         ELECTRICAL/OPTICAL INTERFACES:

            -     SWBT Technical Publication TP-76839 - SONET Transmission
                  Requirements - Performance and Interface Specifications, 
                  Issue 1, January 1996, or the most current version.

            -     SWBT Technical Publication TP-76625 - High Capacity Digital
                  Service (1.544 Mbs and 44.736 Mbs Requirements and
                  Transmission Limits, Issue 1, June 1990, or the most current
                  version.

            INTERCONNECTION RESPONSIBILITIES RELATED TO SIGNALING:
            -     SWBT Technical Publication, TP-76638 - Common Channel
                  Signaling Network Interface Specifications

            -     GR-000246-CORE, Bell Communications Research Specifications of
                  Signaling System 7

            -     GR-000317-CORE, Switching System Requirements for Call Control
                  Using the Integrated Services Digital Network User Part

            -     GR-000394-CORE, Switching System Requirements for
                  Interexchange Carrier Interconnection Using the Integrated
                  Services Digital Network User Part

            -     GR-000606-CORE, LATA Switching Systems Generic
                  Requirements-Common Channel Signaling-Section 6.5

            -     GR-000905-CORE, Common Channel Signaling Network Interface
                  Specification Supporting Network Interconnection Message
                  Transfer Part (MTP) and Integrated Digital Services Network
                  User Part (ISDNUP)

            COLLOCATION
            -     SWBT's Technical Publication for Physical Collocation (sixth
                  revision dated 2-18-97)

            TECHNICAL EXHIBIT SETTLEMENT PROCEDURES
            -     TESP



<PAGE>   293

                                                                   APPENDIX PORT
                                                                     PAGE 2 OF 5

                                  APPENDIX PORT

I.       GENERAL

         SWBT and LSP will provide Interim Number Portability (INP) in
         accordance with requirements of the Act. INP will be provided by each
         Party to the other upon request. INP will be provided with minimum
         impairment of functionality, quality, reliability and convenience to
         subscribers of LSP or SWBT. The Parties will provide Permanent Number
         Portability (PNP) as soon as it is technically feasible, in conformance
         with FCC rules and the Act, and will participate in development of PNP
         in the state, in accordance with the FCC's First Report and Order in
         Docket No. 95-116 (hereinafter called the Number Portability Order). As
         described herein, INP is a service arrangement whereby an end user, who
         switches subscription of local exchange service from one provider to
         another is permitted to retain, for its use, the existing assigned
         number provided that the end user remains in the same serving wire
         center.

II.      TERMS, CONDITIONS UNDER WHICH SWBT SHALL PROVIDE INP

         A.       Service Provided

                  1.       SWBT shall only provide INP, as described herein, to 
                           LSPs.

                  2.       SWBT shall only provide INP services and facilities
                           where technically feasible, subject to the
                           availability of facilities, and only from properly
                           equipped central offices. SWBT does not offer INP
                           services and facilities for NXX codes 555, 976, 950,
                           or SWBT operated coin telephone service.

                  3.       LSP shall not order INP services for local exchange
                           end user accounts of SWBT where the end user=s
                           payments are 45-days or more in arrears unless full
                           payment is made or an agreement is reached where the
                           LSP agrees to make full payment on the end user=s
                           behalf.

                  4.       When the exchange service offerings associated with
                           INP service are provisioned using remote switching
                           arrangements, SWBT shall only make INP service
                           available from, or to host central offices.

         B.       Obligations Of SWBT

                  1.       SWBT's sole responsibility is to comply with the
                           service requests it receives from the LSP and to
                           provide INP in accordance with this Appendix.





<PAGE>   294

                                                                   APPENDIX PORT
                                                                     PAGE 3 OF 5


         C.       OBLIGATIONS OF LSPS

                  1.       LSP shall coordinate the provision of service with
                           SWBT to assure that LSP's switch is capable of
                           accepting INP ported traffic.

                  2.       LSP is solely responsible to provide equipment and
                           facilities that are compatible with SWBT's service
                           parameters, interfaces, equipment and facilities. LSP
                           shall provide sufficient terminating facilities and
                           services at the terminating end of an INP call to
                           adequately handle all traffic to that location and
                           shall ensure that its facilities, equipment and
                           services do not interfere with or impair any
                           facility, equipment or service of SWBT or any of its
                           end users. In the event that SWBT determines in its
                           sole judgment that the LSP will likely impair or is
                           impairing, or interfering with any equipment,
                           facility or service of SWBT or any of its end users,
                           SWBT may either refuse to provide INP service or
                           terminate it in accordance with other provisions of
                           this STC or SWBT's tariffs.

                  3.       LSP shall provide an appropriate intercept
                           announcement service for any telephone numbers
                           subscribed to INP service for which LSP is not
                           presently providing local exchange service or
                           terminating to an end user.

                  4.       Where LSP chooses to disconnect or terminate any INP
                           service, LSP shall designate which standard SWBT
                           intercept announcement SWBT shall provide for
                           disconnected number.

                  5.       LSP shall designate to SWBT at the time of its
                           initial service request for INP service one of the
                           following options for handling and processing of
                           Calling Card, Collect, Third Party, and other
                           operator handled non-sent paid calls from or to LSP
                           assigned telephone numbers:

                           a.       LSP may elect to block the completion of
                                    third number and calling card calls through
                                    the use of LIDB to select ported numbers.

                           b.       For non-sent paid calls billed to INP
                                    assigned numbers, a separate
                                    sub-clearinghouse billing arrangement must
                                    be established which will provide for the
                                    transmission of the EMR 01-01-01 billing
                                    records, and settlement of toll revenues.

         D.       LIMITATIONS OF SERVICE

                  1.       SWBT is not responsible for adverse effects on any
                           service, facility or equipment from the use of INP
                           service.

                  2.       End-to-end transmission characteristics may vary
                           depending on the distance and routing necessary to
                           complete calls over INP facilities and 




<PAGE>   295


                                                                   APPENDIX PORT
                                                                     PAGE 4 OF 5




                           the fact that another carrier is involved in the
                           provisioning of service. Therefore, end-to-end
                           transmission characteristics cannot be specified by
                           SWBT for such calls.

         E.       SERVICE DESCRIPTIONS

                  1.       INP-REMOTE. INP-Remote is a service whereby a call
                           dialed to an INP-Remote equipped telephone number,
                           assigned to SWBT, is automatically forwarded to an
                           LSP-assigned, 7 or 10 digit local telephone number.
                           The forwarded-to-number is specified by the LSP at
                           the same location.

                           a.       INP-Remote provides an initial call path and
                                    two additional paths for the forwarding of
                                    no more than three (3) simultaneous calls to
                                    the LSP's specified forwarded-to number.
                                    Additional call paths are available on a per
                                    path basis.

                           b.       The LSP-assigned forwarded-to number shall
                                    be treated as two separate calls with
                                    respect to interconnection compensation, end
                                    user toll billing and intercompany
                                    settlement and access billing, i.e., an
                                    incoming call to the SWBT ported number
                                    shall be handled like any other SWBT call
                                    being terminated to that end office and the
                                    ported call to the LSP assigned telephone
                                    number in the LSP switch shall be handled as
                                    any local calls between SWBT and the LSP.

                           c.       Where facilities exist, SWBT will provide
                                    identification of the originating telephone
                                    number, via SS7 signaling, to the LSP.

                  2.       INP-DIRECT. INP-Direct is a service which provides
                           for the delivery of the called (dialed) number to the
                           LSP's switching (central office or premises)
                           equipment for identification and subsequent routing
                           and call completion.

                           a.       INP-Direct is available either on a per
                                    voice grade channel basis or a per DS1 (24
                                    equivalent voice grade channels) basis.

                                    (1)     Where the location of the LSP's
                                            switching equipment to which SWBT is
                                            providing voice grade or DS1
                                            INP-Direct service reside outside
                                            the exchange or central office
                                            serving area from which the
                                            INP-Direct service is purchased, LSP
                                            shall pay applicable interoffice
                                            mileage charges as specified in the
                                            applicable state Special Access
                                            Tariff.





<PAGE>   296

                                                                   APPENDIX PORT
                                                                     PAGE 5 OF 5


                           b.       INP-Direct service must be established with
                                    a minimum configuration of two (2) voice
                                    grade channels and one unassigned telephone
                                    number per SWBT switch. Transport facilities
                                    arranged for INP-Direct may not be mixed
                                    with any other type of trunk group. Outgoing
                                    calls may not be placed over facilities
                                    arranged for INP-Direct service.

                           c.       SS7 Signaling is not available on the
                                    INP-Direct facilities.

         F.       PRICING

                  1.       The Parties will comply with all effective FCC,
                           Commission and/or court Orders governing INP cost
                           recovery and compensation. The Parties acknowledge
                           that the Telephone Number Portability Order is
                           subject to pending Petitions for Reconsideration and
                           may be subject to appeal. As such, the Number
                           Portability Order may be reconsidered, revised and
                           remanded, or vacated, subject to further proceedings
                           before the FCC. As such, until a final decision is
                           rendered on INP cost recovery, the Parties agree to
                           track the costs associated with the implementation
                           and provision of INP and to "true-up" INP-related
                           accruals to reflect the final terms of any such
                           order.

                  2.       Neither Party waives its rights to advocate its views
                           on INP cost recovery, or to present before any
                           appropriate regulatory agency or court its views on
                           FCC or Commission actions pertaining to INP cost
                           recovery.



<PAGE>   297

                                              Agreement No.
                                                           ---------------------


                           MASTER AGREEMENT FOR ACCESS
             TO POLES, DUCTS, CONDUITS, AND RIGHTS-OF-WAY (MISSOURI)

         This Agreement dated June 30,1997 is made by and between Southwestern
Bell Telephone Company ("SWBT") and the undersigned Applicant. As provided in
this Agreement, SWBT will provide Applicant nondiscriminatory access, in
accordance with the Pole Attachment Act, the Telecommunications Act of 1996, and
applicable rules, regulations, and commission orders, to poles, ducts, conduits,
and rights-of-way owned or controlled by SWBT and located in this state.

                               ARTICLE 1: PARTIES

         1.01 Southwestern Bell Telephone Company. Southwestern Bell Telephone
Company is a corporation chartered in the State of Missouri. SWBT's principal
office is located at 1010 Pine Street, St. Louis, Missouri 63101.

         1.02 Applicant. Applicant is a telecommunications carrier or cable
television system doing business or operating in this State under the following
name(s): Digital Teleport, Inc.
- --------------------------------------------------------------------------------
- -------------------------------------------------------------------------------.
Applicant maintains offices in this State at the following address:
11111 Dorsett Road 
- --------------------
St. Louis, MO 63043
- -------------------------------------------------------------------------------.
Applicant is more fully described in APPENDIX II ("Identification of
Applicant").

                         ARTICLE 2: PURPOSE OF AGREEMENT

         2.01 Primary Purpose of Agreement. The primary purpose of this
Agreement is to set forth the rates, terms, conditions, and procedures under
which SWBT will provide Applicant access to SWBT's poles, ducts, conduits, and
rights-of-way located in this State.

         2.02 Applicability. This Agreement applies to all poles, ducts,
conduits, and rights-of-way subject to the Pole Attachment Act, 47 U.S.C. ss.
224, as amended by the Telecommunications Act of 1996, and further amendments.

         2.03 Construction in Accordance with Purpose. All provisions of this
Agreement shall be construed and applied consistently with the requirements of
the Pole Attachment Act and those provisions of the Telecommunications Act of
1996, including but not limited to 47 U.S.C. Sections 251(b)(4) and 271
(c)(2)(B)(iii), which mandate access to SWBT's poles, ducts, conduits, and
rights-of-way.


                                     PAGE 1


<PAGE>   298
         2.04 Uniform Application and Nondiscriminatory Access. In Paragraph
1156 of the First Interconnection Order in CC Docket No. 96-98, the FCC has
ordered that "[W]here access is mandated, the rates, terms, and conditions of
access must be uniformly applied to all telecommunications carriers and cable
operators that have or seek access." In Paragraph 1157 of the First
Interconnection Order, the FCC has further stated that except as specifically
noted elsewhere in that order, "a utility may not favor itself over other
parties with respect to the provision of telecommunications or video programming
services." This Agreement has been drafted and shall be construed to effectuate
these nondiscriminatory access requirements.

         2.05 Effect on Rights and Remedies under Law. This Agreement is
intended by the parties to implement, rather than abridge, their respective
rights under federal and state law. In the event of an irreconcilable conflict
between any provision of this Agreement and any applicable federal or state
laws, rules, regulations, or commission orders, the parties' rights and remedies
under such laws, rules, regulations, and orders shall take precedence over the
terms of this Agreement.

         2.06 Additional Negotiations. This Agreement is one of many agreements
between SWBT and parties seeking access to SWBT's poles, ducts, conduits, and
rights-of-way in this State. Nothing contained in this Agreement shall preclude
SWBT from negotiating additional or different terms of access with third
parties. Applicant may, at any time, seek amendments to this Agreement to
conform to the terms of agreements between SWBT and third parties. In addition,
the parties acknowledge that it may be necessary to amend or supersede this
Agreement to conform to changes in the law, streamline procedures for granting
access, address issues not addressed in this Agreement, and resolve operational
concerns arising by virtue of the presence of competing providers of
telecommunications and cable television services on, within, or in the vicinity
of SWBT's poles, ducts, conduits, and rights-of-way. Each party shall,
therefore, at the request of the other party, engage in good faith negotiations
to supplement, amend or replace this Agreement.

         2.07 Relationship to Interconnection Agreement. SWBT has provided
Applicant the option of executing this Agreement either as a standalone
agreement or as part of the interconnection agreement, if any, between the
parties. Applicant's election is reflected in this section, and this Agreement
shall be construed in accordance with Applicant's election. If this Agreement
has been executed as part of an interconnection agreement, Applicant shall have
the additional option of replacing this Agreement at any time with SWBT's
then-current Master Agreement for Access to Poles, Ducts, Conduits, and
Rights-of-Way.

              [X]   This Agreement has been entered into as a standalone
                    Agreement.

              [X]   This Agreement has been entered into, at Applicant's
                    request, as an appendix, attachment, or exhibit to an
                    interconnection agreement 

                                     PAGE 2

<PAGE>   299

                    between the parties. Except otherwise specifically stated in
                    this Agreement, the terms of this Agreement, which are
                    specific to poles, ducts, conduits, and rights-of-way, shall
                    apply in the event of conflict between the terms of this
                    Agreement and the general terms and conditions set forth in
                    the interconnection agreement.

         2.08 Access Ancillary to Arrangements for Interconnection, Collocation,
and Access to Unbundled Network Elements. Nothing contained in this Agreement
shall be construed as precluding Applicant from having such additional access to
SWBT's poles, ducts, conduits, and rights-of-way as may be necessary to
effectuate the terms of other arrangements between Applicant and SWBT relating
to interconnection, collocation, and access to unbundled network elements. To
the extent that this Agreement does not provide the access required, additional
terms of access may be included in any tariff or agreement between the parties
establishing arrangements for interconnection, collocation, or access to
unbundled network elements.

                             ARTICLE 3: DEFINITIONS

         3.01 Definitions in general. As used in this Agreement, the terms
defined in this article shall have the meanings set forth below in Sections 3.02
to 3.48 except as the context otherwise requires.

         3.02 Agreement. The term "Agreement" refers to this Master Agreement
for Access to Poles, Ducts, Conduits, and Rights-of-Way. The term "Agreement"
includes all appendices, attachments, and addenda to this Agreement, including
but not limited to addenda, if any, reflecting state-specific requirements or
Applicant-specific requirements imposed by interconnection arbitration orders.

         3.03 Anchor. The term "anchor" refers to a device, structure, or
assembly which stabilizes a pole and holds it in place. An anchor assembly may
consist of a rod and fixed object or plate, typically embedded in the ground,
which is attached to a guy strand or guy wire which, in turn, is attached to the
pole. The term "anchor" does not include the guy strand which connects the
anchor to the pole.

         3.04 Appendix. The capitalized term "APPENDIX" refers to one of the
following appendices to this Agreement.

              APPENDIX I:    Schedule of Rates, Fees, and Charges

              APPENDIX II:   Identification of Applicant

              APPENDIX III:  Administrative Forms and Notices

                SW-9433:     Pole Attachments


                                     PAGE 3

<PAGE>   300
                SW-9434:     Access Application and Make-Ready Authorization

                SW-9435:     Conduit Occupancy

                SW-9436A:    Notification of Surrender or Modification of Pole
                             Attachment License by Licensee

                SW-9436B:    Notification of Surrender or Modification of 
                             Conduit Occupancy License by Applicant

                SW-9436C:    Notification of Unauthorized Attachments by 
                             Applicant

              APPENDIX IV:   Insurance Requirements

              APPENDIX V:    Nondisclosure Agreement

              APPENDIX VI:   Notices to Applicant

              APPENDIX VII:  Notices to SWBT

              APPENDIX VIII: Identification of Utility Liaison Supervisor (ULS)

         3.05 Assigned. When used with respect to pole, duct, conduit, or
right-of-way space, the term "assigned" refers to space that is occupied by, or
has been designated for occupancy by, either party or by a third party. Except
as otherwise specifically provided in this Agreement, no person or entity shall
have the right to occupy space assigned to another person or entity (other than
on a temporary basis in the event of emergency as provided in Section 15.02 of
this Agreement) until the assignment has been released or lapsed.
Assignment procedures are described in Section 8.02 of this Agreement.

         3.06 Authorized contractor. "Authorized contractors" are contractors
selected by Applicant who may, subject to Applicant's direction and control,
perform facilities modification or make-ready work which would ordinarily be
performed by SWBT or persons acting on SWBT's behalf. As used in this Agreement,
the term "authorized contractor" does not refer to contractors performing
routine installation, maintenance, or repair work on Applicant's behalf or other
contractors who may be selected by Applicant to perform work on Applicant's
behalf without SWBT's approval. More specifically, the term "authorized
contractor" refers only to those contractors included on a list of contractors
mutually approved by Applicant and SWBT to perform one or more of the following
tasks within a specified SWBT construction district: (a) installation of those
sections of Applicant's ducts or facilities which connect to SWBT's conduit
system as provided in Section 6.08(c); (b) installation of inner duct as
provided in Section 10.02(b); (c) excavation work in connection with the removal
of retired or inactive (dead) cables as provided in Section 10.02(c); or (d)
make-ready work as provided in Sections 10.04 and 10.05. A person or entity
approved as an authorized contractor is only an authorized 

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contractor with respect to those tasks for which such person or entity has been
approved by both parties and is an authorized contractor only in those SWBT
construction districts agreed to by both parties. Designation of an authorized
contractor for a specific category of tasks shall not be deemed to be the
designation of such person or entity as an authorized contractor for other
purposes, nor shall approval of an authorized contractor by one SWBT
construction district constitute approval of such authorized contractor for the
area served by a different SWBT construction district; provided, however, that
if a specific construction job extends beyond the boundaries of a single
construction district, an authorized contractor shall, for the purposes of that
job, be deemed to have been approved by all SWBT construction districts in
which the work is to be performed. If, by agreement of the parties or
commission order, Applicant has been approved as an authorized contractor, such
approval shall be noted by an addendum to this Agreement.
        
         3.07 Available. When used with respect to pole, duct, conduit, and
right-of-way space, the term "available" refers to space that is not occupied or
assigned. In conduit systems owned or controlled by SWBT, maintenance ducts will
not be considered "available" for assignment. All other unassigned ducts, inner
ducts, sub-ducts, and partitioned conduits in a conduit system owned or
controlled by SWBT will be deemed available for assignment.

         3.08 Cables. The term "cable" includes but is not limited to
twisted-pair copper, coaxial, and fiber optic cables. Cables are transmissions
media which may be attached to our placed in poles, ducts, conduits, and
rights-of-way but are not themselves poles, ducts, conduits, or rights-of-way.
Nothing contained in this Agreement shall be construed as a grant of access to
cables attached to SWBT's poles or placed in SWBT's ducts, conduits, or
rights-of-way.

         3.09 Conduit. The term "conduit" refers to all SWBT conduits subject to
the Pole Attachment Act. In general, conduits are tubes or structures, usually
underground or on bridges, containing one or more ducts used to enclose cables,
wires, and associated transmission equipment. Except as the context otherwise
requires, the term "conduit" refers only to conduit owned or controlled by SWBT,
including the re-enterable manholes and handholes used to connect ducts and
provide access to cables, wires, and other facilities within the ducts. As used
in this Agreement, the term "conduit" refers only to conduit structures
(including ducts, manholes and handholes) and space within those structures and
does not include (a) cables and other telecommunications equipment located
within conduit structures or (b) central office vaults, controlled environment
vaults, or other SWBT structures (such as huts and cabinets) which branch off
from or are connected to SWBT's conduit.

         3.10 Conduit occupancy. The term "conduit occupancy" refers to the
presence of wire, cable, optical conductors, or other equipment within any part
of SWBT's conduit system.


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<PAGE>   302

         3.11 Conduit system. The term "conduit system" refers to any
combination of ducts, conduits, manholes, and handholes joined to form an
integrated whole. As used in this Agreement, the term "conduit system" refers
only to conduit systems owned or controlled by SWBT and does not include (a)
cables and other telecommunications equipment located within conduit structures
or (b) central office vaults, controlled environment vaults, or other SWBT
structures (such as huts and cabinets) which branch off from or are connected to
SWBT's conduit.

         3.12 Construction District. The term "construction district" refers to
the SWBT organization responsible for outside plant construction in a specified
geographic area. The term "construction district" connotes responsibility for
handling a function and not to the official name of the organization responsible
for outside plant construction matters.

         3.13 Cost/Cost-based. The terms "cost" and "costs" refer to costs
determined in a manner consistent with the Pole Attachment Act and applicable
rules, regulations, and commission orders. The term "cost-based" refers to
rates, fees, and other charges which are based on costs and determined in a
manner consistent with the Pole Attachment Act and applicable rules,
regulations, and commission orders.

         3.14 Duct. The term "duct" refers to all SWBT ducts subject to the Pole
Attachment Act. In general, a "duct" is a single enclosed tube, pipe, or channel
for enclosing and carrying cables, wires, and other equipment. As used in this
Agreement, the term "duct" includes "inner ducts" created by subdividing a duct
into smaller channels. Except as the context otherwise requires, the term "duct"
refers only to ducts owned or controlled by SWBT and space within those ducts
and does not include cables and other telecommunications equipment located
within such ducts.

         3.15 Facilities. The terms "facility" and "facilities" refer to any
property, equipment, or items owned or controlled by any person or entity.

         3.16 FCC. The acronym "FCC" refers to the Federal Communications
Commission.

         3.17 First Interconnection Order. The term "First Interconnection
Order" refers to the First Report and Order adopted by the FCC on September 1,
1996, and released on September 8, 1996, in CC Docket No. 96-98, In the Matter
of Implementation of the Local Competition Provisions in the Telecommunications
Act of 1996 and CC Docket No. 95-185, In the Matter of Interconnection between
Local Exchange Carriers and Commercial Mobile Radio Service Providers. Access to
poles, ducts, conduits, and rights-of-way is addressed in the First
Interconnection Order in Paragraphs 1119-1240.

         3.18 Handhole. The term "handhole" refers to a structure similar in
function to a manhole, but which is too small for personnel to enter. As used in
this Agreement, the term "handhole" refers only to handholes which are part of
SWBT's conduit system and does not refer to handholes which provide access to
buried cables not housed within 


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SWBT ducts or conduits. As used in this Agreement, the term "handhole" refers
only to handhole structures owned or controlled by SWBT and does not include
cables and other telecommunications equipment located within handhole
structures.

         3.19 Hazardous substances. The term "hazardous substances" refers to
hazardous and toxic substances, waste, pollutants, contaminants, and materials  
as defined in the Comprehensive Environmental Response, Compensation and
Liability Act ("CERCLA"), 42 U.S.C. Section 9601(14), as amended, and other
federal, state, and local health, safety, and environmental laws, ordinances,
statutes, rules, and regulations applicable to sites subject to this Agreement,
including but not limited to the Occupational Safety and Health Act ("OSHA").
In general, the term "hazardous substances" refers to any substance the
presence, use, transport, abandonment or disposal of which (a) requires
investigation, remediation, compensation, fine, or penalty under health,
safety, and environmental laws, ordinances, statutes, rules, and regulations
applicable to sites subject to this Agreement or (b) poses risks to human
health, safety, or the environment and is regulated under any such laws,
ordinances, statutes, rules, and regulations. For the purposes of this
Agreement, the term "hazardous substances" shall also include petroleum,
natural gas, and other combustible or noxious liquids, gases, or solids which
may accumulate at sites subject to this Agreement.

         3.20 Interconnection agreement. The term "interconnection agreement"
refers to the interconnection agreement, if any, to which this Agreement has
been made an appendix, attachment, or exhibit, or, as the context may require,
any other interconnection agreement between the parties.

         3.21 Jacket. The term "jacket" refers to a single enclosed outer
covering containing communications wires, fibers, or other communications media.
As used in this Agreement, the term "jacket" refers to the outermost sheath or
jacket of a cable.

         3.22 Joint user. The term "joint user" refers to any person or entity
which has entered or may enter into an agreement or arrangement with SWBT
permitting it to attach its facilities to SWBT's poles or place its facilities
in SWBT's ducts, conduits, or rights-of-way.

         3.23 License. The term "license" refers to a written instrument
confirming that SWBT has granted the application of Applicant or a third party
for access to pole, duct, conduit, or right-of-way space and that, based on
Applicant's or such third party's representations (and SWBT's field inspection,
if any), it appears that no further facilities modification, capacity expansion
or make-ready work by SWBT is required before facilities described in the
application are installed in the space requested. The term "license" refers to
licenses issued by SWBT pursuant to this Agreement and may, if the context
requires, refer to licenses issued by SWBT before the date of this Agreement.
The parties' use of the term "license" in this Agreement shall not be construed
as conferring authority or discretion on SWBT's part to deny access to Applicant
in any manner inconsistent with the requirements of the Pole Attachment Act, the


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<PAGE>   304


Telecommunications Act of 1996, and applicable rules, regulations, and
commission orders.

         3.24 Local service provider ("LSP"). The terms "local service provider"
and "LSP" refer only to telecommunications carriers authorized by applicable
federal and state laws and regulations to provide local exchange service. As
used in this Agreement, these terms include SWBT.

         3.25 Maintenance duct. The term "maintenance duct" generally refers to
a full-sized duct (typically three inches in diameter or larger) which may be
used, on a short-term basis, for maintenance, repair, or emergency restoration
activities. Maintenance ducts will be available, on a nondiscriminatory basis,
to all persons and entities (including SWBT, Applicant, other local service
providers, and other joint users) with facilities in the conduit section in
which the maintenance duct is located for (a) short-term emergency repairs as
provided in Article 15 of this Agreement and (b) short-term non-emergency
maintenance or repair activities as provided in Articles 12 and 13 of this
Agreement. No more than one full-sized duct within any given conduit section
will be designated by SWBT as the maintenance duct. In those locations where, on
the effective date of this Agreement, there is not a full-sized duct available
to be used as a maintenance duct, SWBT will designate an inner duct, if one is
available, as the maintenance duct although such inner duct may be too small to
accommodate some of the cables occupying the conduit section in which such inner
duct is located. The term "maintenance duct" does not include ducts and conduits
extending from a SWBT manhole to customer premises. Maintenance ducts will not
be considered "available" (as defined in Section 3.07) for assignment to SWBT,
Applicant, or joint users for purposes other than short-term uses contemplated
in this section; provided, however, that SWBT may assign the duct currently
designated as a maintenance duct if another suitable full-sized duct will be
made available to serve as a replacement maintenance duct and may assign an
inner duct currently designated as a maintenance duct if another inner duct will
be made available to serve as a replacement maintenance duct. Maintenance duct
designations may change from time to time and may or may not be reflected in
SWBT's outside plant records. When only one usable full-sized duct remains in a
conduit section, that duct shall be deemed to be the maintenance duct.

         3.26 Make-ready work. The term "make-ready work" refers to all work
performed or to be performed to prepare SWBT's poles, ducts, conduits,
rights-of-way, and related facilities for the requested occupancy or attachment
of Applicant's facilities. Make-ready work does not include the actual
installation of Applicant's facilities. "Make-ready work" includes, but is not
limited to, clearing obstructions (e.g., by "rodding" ducts to ensure clear
passage), and rearranging, transferring, replacing, and removing existing
facilities on a pole or in a conduit system where such work is required to
accommodate Applicant's facilities (as contrasted with work performed on SWBT's
behalf in furtherance of SWBT's own business needs or convenience). "Make-ready
work" may require "dig-ups" of existing facilities and may include the repair,
enlargement or modification of SWBT's facilities (including, but not limited to,
poles, 


                                     PAGE 8


<PAGE>   305



ducts, conduits, handholes, and manholes), consolidating services into fewer
cables, or the performance of other work required to make a pole, anchor, duct,
conduit, manhole, handhole, or right-of-way usable for the initial placement of
Applicant's facilities. As used in this Agreement, the term "make-ready work"
also includes associated planning and engineering work required to confirm or
determine the extent of make-ready work required and to plan make-ready
projects.

         3.27 Manhole. The term "manhole" refers to an enclosure, usually below
ground level and entered through a hole on the surface covered with a cast iron,
cast aluminum, steel, or concrete manhole cover, which personnel may enter and
use for the purpose of installing, operating, and maintaining facilities in
ducts or conduits which are parts of SWBT's conduit system. As used in this
Agreement, the term "manhole" refers only to manhole structures owned or
controlled by SWBT and does not include cables and other telecommunications
equipment located within manhole structures.

         3.28 Occupancy. The term "occupancy" refers to the presence of cables
or other facilities on a pole, in a duct or conduit, or within a right-of-way.

         3.29 Overlashing. The term "overlashing" refers to the practice of
placing an additional cable or inner duct by lashing such cable or inner duct
with spinning wire over an existing cable and strand.

         3.30 Person acting on Applicant's behalf. The terms "person acting on
Applicant's behalf," "personnel performing work on Applicant's behalf," and
similar terms include both natural persons and firms and ventures of every type,
including, but not limited to, corporations, partnerships, limited liability
companies, sole proprietorships, and joint ventures. The terms "person acting on
Applicant's behalf," "personnel performing work on Applicant's behalf," and
similar terms specifically include, but are not limited to, Applicant, its
officers, directors, employees, agents, representatives, attorneys, contractors,
subcontractors, and other persons or entities performing services at the request
of or as directed by Applicant and their respective officers, directors,
employees, agents, and representatives. An authorized contractor selected by
Applicant to perform make-ready work shall be deemed to be a person acting on
Applicant's behalf while performing such work at Applicant's request.

         3.31 Person acting on SWBT's behalf. The terms "person acting on SWBT's
behalf," "personnel performing work on SWBT's behalf," and similar terms include
both natural persons and firms and ventures of every type, including but not
limited to corporations, partnerships, limited liability companies, sole
proprietorships, and joint ventures. The terms "person acting on SWBT's behalf,"
"personnel performing work on SWBT's behalf," and similar terms specifically
include, but are not limited to, SWBT, its officers, directors, employees,
agents, representatives, attorneys, contractors, subcontractors, and other
persons or entities performing services at the request of or as directed by SWBT
and their respective officers, directors, employees, agents, and
representatives. An authorized contractor selected by SWBT to perform make-ready

                                     PAGE 9




<PAGE>   306




work shall be deemed to be a person acting on SWBT's behalf while performing
such work at SWBT's request.

         3.32 Pole. The term "pole" refers to all SWBT poles subject to the Pole
Attachment Act. Except as the context otherwise requires, the term "pole" refers
only to poles (and associated anchors) which are owned or controlled by SWBT and
does not include cables and other telecommunications equipment attached to pole
structures.

         3.33 Pole Attachment. As defined in the Pole Attachment Act, 47 U.S.C.
Section 224(a)(4), the term "pole attachment" refers to "any attachment by a
cable television system or provider of telecommunications service to a pole,
duct, conduit, or right-of way owned or controlled by a utility." In this
Agreement, except as the context otherwise requires, the term "pole attachment"
refers to any attachment by a cable television system or provider of
telecommunications service to a pole (and associated anchors) owned or
controlled by SWBT. The term "pole attachment" includes all such facilities
attached to or supported by a SWBT pole, including but not limited to cables,
risers and U-guards, equipment boxes, drop wires, anchors, bolts, clamps, drive
rings, guys, hooks, strands, and other hardware affixed to the pole. Groupings
of associated pole attachments for billing purposes shall be consistent with
the Pole Attachment Act and applicable rules, regulations, and commission
orders. Except as otherwise authorized by applicable FCC rules, regulations, or
orders, Applicant's pole attachments occupying the same usable space (or
otherwise associated with facilities occupying the same usable space on a pole)
shall be treated as a single attachment for billing purposes.

         3.34 Pole Attachment Act. The term "Pole Attachment Act" refers to
those provisions of the Communications Act of 1934, as amended by the
Telecommunications Act of 1996, now codified as 47 U.S.C. Section 224, as those
provisions may be amended from time to time.

         3.35 Pre-license survey. The term "pre-license survey" refers to work
and activities performed or to be performed by SWBT or by persons acting on
SWBT's behalf for the primary purpose of:

              (a)  confirming or determining the existing availability and
                   capacity of a pole, duct, conduit, or right-of-way and
                   identifying capacity, safety, reliability, or engineering
                   concerns, if any, relating to Applicant's application;

              (b)  confirming or determining the extent, if any, to which
                   modifications to SWBT's poles, ducts, conduits, or
                   right-of-ways are required to accommodate Applicant's
                   facilities;

              (c)  confirming or determining what make-ready work, if any, will
                   be required to prepare SWBT's poles, ducts, conduits, or
                   rights-of-way to accommodate Applicant's facilities; and


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<PAGE>   307

              (d)  estimating the costs, if any, that Applicant will be required
                   to pay for any such facilities modification, capacity
                   expansion, or make-ready work.

         3.36 Pre-occupancy survey. The term "pre-occupancy survey" refers to
work and activities performed or to be performed by Applicant or persons acting
on Applicant's behalf for the primary purpose of enabling Applicant to
determine:

              (a)  whether SWBT's poles, ducts, conduits, or rights-of-way, in
                   their existing condition, are suitable for Applicant's
                   intended use;

              (b)  the extent, if any, to which modifications of SWBT's poles,
                   ducts, conduits, or rights-of-way will be proposed by
                   Applicant to expand the capacity of SWBT's poles, ducts,
                   conduits, or rights-of-way to accommodate Applicant's
                   facilities; and 

              (c)  what other capacity expansion or make-ready work, if any,
                   will be proposed by Applicant to prepare SWBT's poles, ducts,
                   conduits, and rights-of-way to accommodate Applicant's
                   facilities.

         3.37 Primary point of contact. The term "primary point of contact"
refers to the persons designated by Applicant and SWBT, respectively, to
coordinate arrangements for Applicant's access to SWBT's poles, ducts, conduits,
and rights-of-way and records relating to such poles, ducts, conduits, and
rights-of-way. SWBT's designated primary point of contact shall be the Utility
Liaison Supervisor unless the parties have arranged for that function to be
performed by a designated account representative who will serve as an
intermediary between Applicant and the Utility Liaison Supervisor.

         3.38 Rights-of-way. The term "rights-of-way" refers to all SWBT
rights-of-way subject to the Pole Attachment Act. In general, rights-of-way are
legal rights to pass over or through property of another party for limited
purposes as defined in a statute, ordinance, easement, grant or other
conveyance. Rights-of-way include but are not limited to (a) public
rights-of-way which SWBT may occupy as permitted by law for the placement of its
facilities (e.g., rights-of-way on, under, or over streets, highways, and other
public roads) and (b) easements or servitudes granted by property owners or
obtained through the exercise of eminent domain authority authorizing SWBT to
pass over, place facilities on, and have rights of ingress and egress to the
property of such property owners. Rights-of-way may also include easements
which, at the time of land development or subdivision, were dedicated for use by
public or private utilities and are being occupied, in whole or in part, by
SWBT's facilities. Except as the context otherwise requires, the term
"rights-of-way" as used in this Agreement refers only to rights-of-way owned or
controlled by SWBT and does not include (a) cables and other telecommunications
equipment buried or located on such rights-of-way, (b) public rights of way
(which are owned by and subject to the control of governmental entities), or (c)


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any space which is owned and controlled by a third-party property owner and
occupied by SWBT with permission from such owner rather than as a matter of
legal right. As used in this Agreement, the term "right-of-way" may also include
certain fee-owned or leased property acquired by SWBT for the specific purpose
of installing poles, ducts, or conduits or burying underground cables which are
part of SWBT's network distribution facilities.

         3.39 Sheath. The term "sheath" refers to an enclosed covering
containing communications wires, fibers, or other communications media. A cable
may include both inner and outer sheaths.

         3.40 Spinning. The term "spinning" refers to a method of attaching a
cable or inner duct to a supporting strand. "Spinning" is sometimes referred to
as "lashing."

         3.41 State. When capitalized, the term "State" (as used in terms such
as "this State") refers to the State of Missouri.

         3.42 State Commission. The term "State Commission" refers to the
Missouri Public Service Commission.

         3.43 Strand. The term "strand" refers to support wires, typically
stranded together, or other devices attached to a pole and connecting that pole
to an anchor or to another pole for the purpose of increasing pole stability or
supporting wires, cables, and associated facilities. The term "strand" includes,
but is not limited to, strands sometimes referred to as "anchor stands,"
"anchor/guy strands," "down guys," "guy strands," "pole-to-pole guys," and
"messengers."

         3.44 Telecommunications Act of 1996. The term "Telecommunications Act
of 1996" refers to the Telecommunications Act of 1996, Pub. L. No. 104-104, 110
Stat. 56, enacted February 8, 1996.

         3.45 Third party. The terms "third party" and "third parties" refer to
persons and entities other than the parties to this Agreement (that is, persons
and entities other than Applicant and SWBT).

         3.46 Utility Liaison Supervisor ("ULS"). The terms "Utility Liaison
Supervisor" and "ULS" refer to the person or persons designated by SWBT to be
responsible for handling and processing requests for access to SWBT's poles,
ducts, conduits, and rights of-way in this State. The term "ULS" connotes
responsibility for handling a function and is not a job title. Except as
otherwise specifically provided in this Agreement or in the parties'
interconnection agreement, if any, the ULS shall serve as Applicant's single
point of contact for arranging access to SWBT's poles, ducts, conduits, and
rights-of-way and access to SWBT's records relating to SWBT's poles, ducts,
conduits, and rights-of way. The Utility Liaison Supervisor for this State is
identified in APPENDIX VIII.


                                    PAGE 12


<PAGE>   309

         3.47 Vault. The term "vault" includes central office vaults and
controlled environment vaults ("CEVs"). Vaults may be connected to, but are not
considered part of, SWBT's conduit system. Access, if any, to vaults (and to
ducts, conduits, and risers which serve no purpose other than to provide a means
of entry to and exit from such vaults) shall be governed by the tariffs,
agreements, or commission orders, if any, establishing arrangements for
interconnection, collocation, and access to unbundled network elements, and not
by this Agreement.

         3.48 "Vicinity of ...". When used in terms such as "vicinity of SWBT's
conduit system," "vicinity of SWBT's poles," "vicinity of SWBT's rights-of-way,"
or "vicinity of SWBT's poles, ducts, conduits, or rights-of-way," the term
"vicinity of ..." includes sites on, within, near to, surrounding, or adjoining
SWBT's poles, ducts, conduits, and rights-of-way. These sites include, but are
not limited to, all sites within a distance of 10 feet of any SWBT pole, duct,
conduit, or right-of-way.

                    ARTICLE 4: NATURE AND SCOPE OF AGREEMENT

         4.01 Scope of Agreement. This Agreement establishes the rates, terms,
conditions, and procedures for access to SWBT's poles, ducts, conduits, and
rights-of way located within this State, without regard to whether such poles,
ducts, conduits, or rights-of-way are located on public or private property;
provided, however, that nothing contained in this Agreement shall be construed
as a grant of access to any facilities which are not poles, ducts, conduits, or
rights-of-way subject to the Pole Attachment Act or to any poles, ducts,
conduits, right-of-way, facilities, or property owned and controlled by parties
other than SWBT. Separate tariffs or agreements, including other portions of the
parties' interconnection agreement, and not this Agreement, shall govern
Applicant's access, if any, to the following facilities which require special
security, technical, and construction arrangements outside the scope of this
Agreement:

              (a)  SWBT's central office vaults and ducts and conduits which
                   serve no purpose other than to provide a means of entry to
                   and exit from SWBT's central offices;

              (b)  controlled environment vaults (CEVs), huts, cabinets, and
                   other similar outside plant structures and ducts and conduits
                   which serve no purpose other than to provide a means of entry
                   to and exit from such vaults, huts, cabinets, and structures;

              (c)  ducts and conduits located within buildings owned by SWBT;
                   and

              (d)  ducts, conduits, equipment rooms, and similar spaces located
                   in space leased by SWBT from third-party property owners for
                   purposes other than to house cables and other equipment in
                   active service as part of SWBT's network distribution
                   operations.



                                    PAGE 13


<PAGE>   310

         4.02 No Transfer of Property Rights to Applicant. Nothing contained in
this Agreement or any license subject to this Agreement shall create or vest (or
be construed as creating or vesting) in either party any right, title, or
interest in or to any real or personal property owned by the other. The payment
of fees and charges as provided by this Agreement and licenses subject to this
Agreement shall not create or vest (or be construed as creating or vesting) in
either party any right, title, or interest in or to any real or personal
property owned by the other. No use, however extended, of SWBT's poles, ducts,
conduits, or rights-of-way shall create or vest (or be construed as creating or
vesting) in Applicant any right, title, or interest in or to any real or
personal property owned by SWBT, and the placement of Applicant's facilities on
or in SWBT's poles, ducts, conduits and rights-of-way shall not create or vest
in SWBT any right, title, or interest in such facilities.

         4.03 No Effect on SWBT's Right to Abandon, Convey or Transfer Poles,
Ducts, Conduits, or Rights-of-Way. Except as provided in subsections (a)-(d) of
this section, nothing contained in this Agreement or any license subject to this
Agreement shall in any way affect SWBT's right to abandon, convey, or transfer
to any other person or entity SWBT's interest in any of SWBT's poles, ducts,
conduits, or rights-of-way.

              (a)  SWBT shall give Applicant no less than 60 days written notice
                   prior to abandoning, conveying or transferring any pole,
                   duct, conduit, or right-of-way (1) to or in which Applicant
                   has attached or placed facilities pursuant to this Agreement
                   or (2) with respect to which Applicant has been assigned pole
                   attachment or conduit occupancy space. The notice shall
                   identify the transferee, if any, to whom any such pole, duct,
                   conduit, or right-of-way is to be conveyed or transferred.

              (b)  SWBT represents that prior to the effective date of this
                   Agreement, and prior to enactment of the Telecommunications
                   Act of 1996, SWBT entered into one or more "joint use pole
                   agreements" with electric utilities located in this State and
                   that such agreements may require SWBT to transfer or convey
                   poles to such electric utilities from time to time. Nothing
                   contained in this Agreement shall abridge the rights of SWBT
                   or any electric utility under any contract executed prior to
                   the effective date of this Agreement. In the event of any
                   transfer or conveyance of poles to an electric utility
                   pursuant to such a joint pole agreement, SWBT will, at
                   Applicant's request, provide Applicant and the transferee
                   utility with such information as may be necessary to minimize
                   any burdens to Applicant which may arise out of or in
                   connection with the transfer or conveyance.

              (c)  Transfers of SWBT's poles, ducts, conduits, and rights-of-way
                   shall be subject to Applicant's rights at the time of
                   transfer. Applicant shall, at the request of SWBT or the
                   transferee, provide SWBT or the transferee with all
                   information required to assess Applicant's rights,
                   post-transfer 


                                    PAGE 14


<PAGE>   311


                   intentions with respect to continued occupancy, and
                   willingness to negotiate new rates, terms, and conditions of
                   access. Applicant shall not unreasonably refuse to negotiate
                   with the transferee. If the transferee itself is a local
                   exchange carrier or other utility subject to the Pole
                   Attachment Act, Applicant shall, at the request of the
                   transferee, negotiate in good faith new rates, terms, and
                   conditions of access.

              (d)  Transfers or conveyances of poles, ducts, conduits, or
                   rights-of-way to any entity controlling, controlled by, or
                   under common control with SWBT or to any entity which
                   acquires or succeeds to ownership of substantially all of
                   SWBT's assets shall be subject to Applicant's rights under
                   this Agreement and licenses subject to this Agreement.

         4.04 No Effect on SWBT's Rights to Manage its Poles, Ducts, Conduits,
and Rights-of-Way. Subject to Applicant's rights under this Agreement and       
applicable federal and state laws, rules, regulations, and commission orders,
including, but not limited to, 47 C.F.R Section 1.1403 (requiring 60 days'
notice of contemplated modifications), SWBT may (a) locate, relocate, move,
replace, modify, maintain, and remove all poles, ducts, conduits, and
rights-of-way subject to this Agreement at any time and in any manner as SWBT
deems appropriate and (b) enter into new agreements or arrangements with other
persons or entities permitting them to attach facilities to SWBT's poles or
place facilities in or on SWBT's ducts, conduits, or rights-of-way.

         4.05 No Right to Interfere. Except to the extent expressly provided by
the provisions of this Agreement, the provisions of this Agreement shall not be
construed as authorizing either party to this Agreement, or persons acting on
their behalf, to rearrange or interfere in any way with (a) the facilities of
the other party or joint users, (b) the use of or access to such facilities by
the other party or joint users, or (c) the ability of either party or joint
users to conduct normal business operations, serve their respective customers,
or avail themselves of new business opportunities.

         4.06 Required Franchises, Permits, Certificates, and Licenses. This
Agreement shall not be construed as relieving either party from any obligations
it may have to obtain legal authority to construct, operate, maintain, repair,
and remove its facilities on public or private property (including but not
limited to any required franchises, permits, certificates, licenses, easements,
or the like) from all appropriate public authorities and private persons or
entities.

         4.07 DISCLAIMER OF WARRANTIES. SWBT MAKES NO REPRESENTATIONS THAT
SWBT'S POLES, DUCTS, CONDUITS, OR RIGHTS-OF-WAY ARE SUITABLE FOR APPLICANT'S
INTENDED USES. SWBT MAKES NO WARRANTIES, EXPRESS OR IMPLIED, OF MERCHANTABILITY
OR FITNESS FOR A PARTICULAR PURPOSE. IN THIS AGREEMENT, SWBT MAKES NO IMPLIED
WARRANTIES OF ANY KIND.




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         4.08 Third-party Beneficiaries. Except as may be specifically set forth
in this Agreement, this Agreement does not provide and shall not be construed to
provide third parties with any remedy, claim, liability, reimbursement, cause of
action, or other privilege.

                       ARTICLE 5: ACCESS TO RIGHTS-OF-WAY

         5.01 Public Rights-of-Way. SWBT and Applicant agree that neither party
has the right to restrict or interfere with the other party's lawful access to
and use of public rights-of-way, including public rights-of-way which pass over
property owned by either party. Except as otherwise specifically provided in
this Agreement, SWBT and Applicant shall each be responsible for obtaining their
own rights-of-way and permission to use real or personal property owned or
controlled by any governmental body.

         5.02 Private Rights-of-Way Not Owned or Controlled by Either Party.
SWBT and Applicant agree that neither party shall restrict or interfere with the
other party's access to or right to occupy property owned by third-parties which
is not subject to the other party's control, including property as to which
either party has access subject to non-exclusive rights-of-way. Subject to the
procedures set forth in Section 5.04 below, each party shall make its own,
independent legal assessment of its right to enter upon or use the property of
third-party property owners and shall bear all expenses, including legal
expenses, involved in making such determinations.

         5.03 Access to Rights-of-Way Generally. Each pole attachment and
conduit occupancy assignment or license made, issued, or subject to this
Agreement shall include access to and use of all associated rights-of-way
including, but not limited to, rights-of way required by Applicant for ingress,
egress, or other access to any sites where SWBT's poles or any part of SWBT's
conduit system are located, but only to the extent, if any, that SWBT has the
legal authority to grant such access and use. At locations where SWBT has access
to third-party property pursuant to non-exclusive rights-of-way, SWBT shall not
interfere with Applicant's negotiations with third-party property owners for
similar access or with Applicant's access to such property pursuant to easements
or other rights-of-ways obtained by Applicant from the property owner; provided,
however, that neither party shall conduct activities on such right-of-way which
interfere with the facilities of the other party or with the other party's
access to and use of its own facilities. At locations where SWBT has obtained
exclusive rights-of-way from third-party property owners or otherwise controls
the right-of-way, SWBT shall, to the extent space is available, and subject to
reasonable safety, reliability, and engineering conditions, provide access to
Applicant and third parties on a nondiscriminatory, first-come, first-served
basis, provided that the underlying agreement with the property owner permits
SWBT to provide such access, and provided further that Applicant agrees to
indemnify, on request defend, and hold SWBT harmless from any injury, loss,
damage, claim, or liability arising out of or in connection with such access or
use. Such access shall be granted, on a case-by-case basis, in the form of a
license, sublicense, sub-easement, or other mutually acceptable writing. Except
as otherwise agreed to by the parties, SWBT's 


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charges for such access (obtained from SWBT rather than from the third-party
property owner) shall include (a) a pro rata portion of the charges (including
but not limited to one-time charges and recurring charges), if any, paid by SWBT
to obtain the right-of way plus (b) any other documented legal, administrative,
and engineering costs incurred by SWBT in obtaining the right-of-way and
processing Applicant's request for access. Applicant's pro rata portion of the
charge paid by SWBT shall be negotiated on a case-by-case basis and shall take
into account the size of the area used by Applicant and the number of users
occupying the right-of-way.

         5.04 Special Procedures for Obtaining Access to Third-party Property.
Although SWBT will afford access to rights-of-way owned or controlled by it and
permit Applicant to utilize SWBT's rights-of-way to the extent that SWBT has
legal authority to do so, Applicant acknowledges that SWBT may not own or
control certain rights-of-way to the extent necessary to permit Applicant full
access to such rights-of-way. The following general principles shall be applied
with respect to access to rights-of-way on third-party property in those
situations in which SWBT does not have authority to permit Applicant access or
either party has a good faith belief that SWBT does not have such authority:

              (a)  Applicant will first attempt to obtain right-of-way directly
                   from the property owner.

              (b)  If Applicant has the right of eminent domain under state law,
                   Applicant will independently attempt to obtain the
                   right-of-way it seeks through the exercise of that right.

              (c)  If Applicant is unable to obtain access to a right-of-way
                   under subsections (a) or (b) above, Applicant may request in
                   writing that SWBT exercise its right of eminent domain to
                   condemn the right-of way for Applicant's use and SWBT will
                   respond to Applicant's written request within 45 days. SWBT
                   will exercise its right of eminent domain on Applicant's
                   behalf only if permitted to do so under applicable state law,
                   and only if Applicant agrees to bear all costs and expenses,
                   including but not limited to legal fees, arising out of or in
                   connection with the condemnation proceedings.

         5.05 Access to Rights-of-Way Incident to the Use of CEVs and Similar
Structures. SWBT will provide Applicant nondiscriminatory access, consistent
with the requirements of the Pole Attachment Act and Telecommunications Act of
1996, and as provided in Sections 5.03 and 5.04 above, to rights-of-way
containing Controlled Environment Vaults (CEVs), huts, cabinets, and other
similar structures. SWBT will place no restrictions on access to such
rights-of-way that are more restrictive than those SWBT places on itself;
provided, however, that neither party shall conduct activities on such
rights-of-way which interfere with the facilities of the other party, with the
privacy of communications carried over the other party's network, or with the
other party's 

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<PAGE>   314


access to and use of its own facilities. This section relates only to access to
rights-of-way and shall not be construed as granting access to the CEVs, huts,
cabinets, and similar structures located on such rights-of-way. Access, if any,
to CEVs, huts, cabinets, and similar structures, and to ducts, conduits, and
risers which serve no purpose other than to provide a means of entering or
exiting such structures, shall be governed by the tariff, agreement, or order,
if any, granting Applicant access to such structures.

         5.06 Access to Building Entrance Facilities, Building Distribution
Facilities, and Equipment Rooms. The parties acknowledge that ownership and
control of building entrance and distribution ducts, building entrance and
distribution conduits, building entrance and building distribution space,
equipment rooms, equipment closets, mechanical rooms, telephone communications
rooms, and similar spaces will vary from location to location and that the
respective rights of third-party property owners, tenants in buildings owned by
third-party property owners, telecommunications carriers, cable television
systems, and other providers of telecommunications services with respect to such
ducts, conduits, and spaces must be determined on a case-by-case basis. Each
party shall, when feasible, directly obtain from third-party property owners
such access to building entrance and building distribution ducts, building
entrance and building distribution conduits, building entrance and distribution
space, equipment rooms, equipment closets, mechanical rooms, telephone
communications rooms, and other similar areas as may be needed by such party to
serve the building owner and tenants located within buildings owned by third
parties or to access other space in the building occupied or to be occupied by
such party. In those situations in which Applicant cannot obtain from the
building owner access on terms satisfactory to Applicant, Applicant may request
access from SWBT as provided in Sections 5.03-5.04 of this Agreement; provided,
however, that a separate, building-specific notice of intent to occupy under
Section 8.02(b) or license application under Section 9.02, including such
additional information as may be necessary to identify the space to be occupied
and the facilities to be placed in such space, shall be required for access to
the facilities and space subject to this section. Any such notice or application
shall conspicuously note on its face that access to building entrance or
building distribution facilities or space is being sought. Applicant
acknowledges that SWBT must, before providing access to building space and
facilities located on or within third-party property, review applicable legal
documents and physical arrangements relating to the property, including physical
arrangements within the building. Upon completion of that review, SWBT will
notify Applicant whether Applicant's request can be granted under this
Agreement, will require access arrangements under a tariff or other applicable
agreement, or will require other special handling (e.g., direct negotiations
with the third-party property owner). Pending such notice, Applicant may not
occupy any duct, conduit, or space subject to this section pursuant to Section
8.03 without SWBT's express written consent but may exercise occupancy rights
obtained directly from the building owner. If SWBT has lawful authority to
provide such access and is required by the Pole Attachment Act to do so, SWBT
shall provide Applicant access under this Agreement. Such access shall be
negotiated on a case-by-case basis taking into account any special legal,
technical, security, or construction considerations applicable to the ducts,
conduits, or space which 

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<PAGE>   315



Applicant seeks to access. Such access, when provided, shall only include access
to ducts, conduits, and available space (as distinguished from access to cables
and other equipment not subject to the Pole Attachment Act). Such access shall
be subject to such reasonable terms and conditions as may be appropriate to
protect the equipment and other property of the parties and third parties, the
reliability of the parties' networks and the networks of third parties, and the
privacy of communications carried over the parties' networks and networks of
third parties.

              (a)  Applicant's access, if any, to building entrance ducts and
                   building entrance conduits entering SWBT-owned buildings
                   (including but not limited to central offices) and access, if
                   any, to other building entrance and building distribution
                   facilities and space located within such buildings shall be
                   arranged under and shall be subject to tariffs, agreements,
                   and, if applicable, commission or court orders establishing
                   such access rights rather than this Agreement.

              (b)  Applicant's access to and use of building entrance ducts,
                   building entrance conduits, building entrance space, and
                   other building entrance facilities owned and controlled by
                   third-parties shall be obtained by Applicant through direct
                   negotiations between Applicant and the third-party property
                   owners who own and control access to such facilities. If SWBT
                   owns a building entrance duct, building entrance conduit, or
                   other building entrance space, or if SWBT has sufficient
                   control over a building entrance duct, building entrance
                   conduit, or other building entrance space to permit other
                   telecommunications carriers or cable television systems to
                   have access to such ducts, conduits, or space without
                   approval or consent from the third-party property owner, SWBT
                   shall, if adequate capacity is available, and subject to
                   reasonable safety, reliability, and engineering conditions,
                   provide access to Applicant and other telecommunications
                   carriers and cable television systems on a nondiscriminatory,
                   first-come, first-served basis; provided, however, that
                   Applicant agrees to indemnify, on request defend, and hold
                   SWBT harmless from any injury, loss, damage, claim or
                   liability arising out of or in connection with Applicant's
                   access to or use of such building entrance ducts, building
                   entrance conduits, or other building entrance space. Such
                   access shall be granted, on a case-by-case basis, in the form
                   of a license, sublicense, easement, sub-easement, or other
                   mutually acceptable writing and shall not include access to
                   or the right to use SWBT's cables or other SWBT
                   telecommunications equipment occupying such ducts, conduits,
                   or space. Except as otherwise agreed to by the parties,
                   SWBT's charge for such access (obtained from SWBT rather than
                   from the third-party property owner) shall include (1) a pro
                   rata portion of all charges (including but not limited to
                   one-time charges and recurring charges), if any, paid by SWBT
                   to obtain the building entrance duct, building entrance
                   conduit, or building entrance space and 

                                    PAGE 19


<PAGE>   316


                   (2) any other documented legal, administrative, engineering
                   costs and construction costs incurred by SWBT to obtain such
                   duct, conduit, or space, process Applicant's request for
                   access, or prepare the facilities for Applicant's occupancy
                   or use. SWBT's charges to Applicant under this subsection
                   shall be calculated and negotiated on a case-by-case basis.

              (c)  Applicant's access to and use of building distribution ducts,
                   building distribution conduits, building distribution space,
                   and other building distribution facilities owned and
                   controlled by third-parties shall be obtained by Applicant
                   through direct negotiations between Applicant and the
                   third-party property owners who own and control access to
                   such facilities. If SWBT owns a building distribution duct,
                   building distribution conduit, or other building distribution
                   space, or if SWBT has sufficient control over a building
                   distribution duct, building distribution conduit, or other
                   building distribution space to permit other
                   telecommunications carriers or cable television systems to
                   have access to such duct, conduit, or space without approval
                   or consent from the third-party property owner, SWBT shall,
                   if adequate capacity is available, and subject to reasonable
                   safety, reliability, and engineering conditions, provide
                   access to Applicant and other telecommunications carriers and
                   cable television systems on a nondiscriminatory, first-come,
                   first-served basis; provided, however, that Applicant agrees
                   to indemnify, on request defend, and hold SWBT harmless from
                   any injury, loss, damage, claim or liability arising out of
                   or in connection with Applicant's access to or use of such
                   building distribution ducts, building distribution conduits,
                   or other building distribution space. Such access shall be
                   granted, on a case-by-case basis, in the form of a license,
                   sublicense, easement, sub-easement, or other mutually
                   acceptable writing and shall not include access to or the
                   right to use SWBT's cables or other SWBT telecommunications
                   equipment occupying such ducts, conduits, or space. Except as
                   otherwise agreed to by the parties, SWBT's charges for such
                   access (obtained from SWBT rather than from the third-party
                   property owner) shall include ( 1) a pro rata portion of all
                   charges (including but not limited to one-time charges and
                   recurring charges) paid by SWBT to obtain the building
                   distribution duct, building distribution conduit, or building
                   distribution space and (2) any other documented legal,
                   administrative, engineering costs and construction costs
                   incurred by SWBT to obtain such duct, conduit, or space,
                   process Applicant's request for access, or prepare the
                   facilities for Applicant's occupancy or use. SWBT's charges
                   to Applicant under this subsection shall be calculated and
                   negotiated on a case-by-case basis.

              (d)  Access to equipment rooms, equipment closets, mechanical
                   rooms, telephone communications rooms, and similar areas
                   located in buildings owned and controlled by third-parties
                   shall be subject to access as 



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                   provided in subsection (c); provided, however, that when any
                   such room or space is leased to SWBT on an exclusive basis
                   (as may be the case if the room or space will be used to
                   house remote switching equipment, pair gain equipment, or
                   other network equipment used to provide or support
                   telecommunications services to customers at locations outside
                   the building in which such room is located), access, if any,
                   shall be also subject to facilities collocation tariffs,
                   agreements, or arrangements.

              (e)  Nothing contained in this section shall be construed as
                   authorizing Applicant to occupy space owned or controlled by
                   third parties or to utilize third-party facilities or
                   property without permission or authority from the owner of
                   such property, where such permission or authority is
                   required. Neither this section nor any license or permission
                   granted under or subject to this section shall be construed
                   as a representation by SWBT to Applicant that Applicant has
                   the right to have access to or occupy any duct, conduit, or
                   space owned and controlled by a third-party property owner or
                   to utilize any telecommunications equipment owned or
                   controlled by SWBT or any third party (including but not
                   limited to owner- or tenant-owned cables, wires, and
                   equipment located on the customer side of any network
                   interface device).

              (f)  If Applicant has been granted access to a building entrance
                   or building distribution duct, conduit, or space pursuant to
                   this section, Applicant shall, at SWBT's request, relinquish
                   such access to SWBT if it is subsequently determined that
                   Applicant's use of such space will preclude SWBT from meeting
                   carrier- or provider-of-last-resort obligations to customers
                   on the premises affected.

                            ARTICLE 6: SPECIFICATIONS

         6.01 Compliance with Requirements, Specifications, and Standards.
Applicant agrees that Applicant's facilities attached to SWBT's poles or
occupying space in SWBT's ducts, conduits, and rights-of-way shall be attached,
placed, constructed, maintained, repaired, and removed in full compliance with
the requirements, specifications, and standards specified in this Agreement.

         6.02 Design to Minimize the Need for Access to SWBT's Poles, Ducts, and
Conduits. The parties shall each design their facilities to minimize the need
for the parties to access SWBT's poles, ducts, and conduits.

         6.03 Infrequent Construction Techniques and Connectivity Solutions.
Unless precluded by documented engineering criteria or written guidelines SWBT
applied to itself as of January 1, 1996, and consistent with considerations of
safety, reliability, and sound engineering practice, SWBT will permit Applicant
at its own expense to utilize the following techniques to avoid high or unusual
expenditures: (a) placement of pole 


                                    PAGE 21

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attachments on both the "field" side and "road" side of a pole; (b) placement of
extension arms or stand-off brackets on poles; and (c) building conduit branches
into SWBT's conduit systems. Applicant acknowledges that use of the above
techniques will be rare, will be permitted only on a case-by-case basis, and
must be performed in a manner which does not jeopardize the structural integrity
of SWBT's facilities, the safety of personnel working on or in SWBT's poles,
ducts, or conduits, and does not render unusable other available space on the
pole or in the duct or conduit. Except as otherwise agreed to by the parties in
writing, extension arms or stand-off brackets, if utilized, shall be installed
as make-ready work in accordance with SWBT's specifications and at Applicant's
expense. Once installed, extension arms and stand-off brackets shall become part
of the pole and shall be owned by SWBT. Unused capacity on any such extension
arms or stand-off brackets shall be deemed "available" (as defined in Section
3.07) for assignment.

         6.04 Published Standards. SWBT and Applicant agree that the following
standards equally apply to either party with respect to facilities attached to
or placed in SWBT's poles, ducts, conduits, and rights-of-way and further agree
that facilities shall be placed, constructed, maintained, repaired, and removed
in accordance with current (as of the date when such work is performed) editions
of the following publications:

              (a)  the Blue Book Manual of Construction Procedures, Special
                   Report SR-TAP-001421, published by Bell Communications
                   Research, Inc. ("Bellcore"), and sometimes referred to as the
                   "Blue Book";

              (b)  the National Electrical Safety Code ("NESC"), published by
                   the Institute of Electrical and Electronic Engineers, Inc.
                   ("IEEE"); and

              (c)  the National Electrical Code ("NEC"), published by the
                   National Fire Protection Association ("NFPA").

         6.05 Additional Electrical Design Specifications: Conduit. The parties
agree that, in addition to the specifications and requirements referred to in
Sections 6.01-6.04 above, facilities placed in SWBT's conduit system after the
effective date of this Agreement shall meet the electrical design specifications
set forth in this section.

              (a)  No facilities shall be placed in SWBT's conduit system in
                   violation of FCC regulations, including regulations relating
                   to electrical interference. In addition, neither party shall
                   place any facility in SWBT's conduit system which causes or
                   may cause electrical interference with the facilities of the
                   other party or joint users sufficient to jeopardize network
                   integrity or degrade the quality of any communications
                   services offered by either party or a joint user. If either
                   party is notified by the other party or a joint user that its
                   facilities are causing, or have the potential to cause,
                   unacceptable levels of electrical interference, the party
                   notified shall either correct the problem, remove the
                   facility, or initiate good 

                                    PAGE 22

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                   faith negotiations with the complaining party or joint user 
                   to resolve the issue.

              (b)  Facilities placed in SWBT's conduit system shall not be
                   designed to use the earth as the sole conductor for any part
                   of the circuits.

              (c)  Facilities placed in SWBT's conduit system and carrying more
                   than 50 volts AC (rms) to ground or 135 volts DC to ground
                   shall be enclosed in an effectively grounded sheath or
                   shield.

              (d)  No coaxial cable shall be placed in SWBT's conduit system
                   unless such cable meets the voltage limitations of Article
                   820 of the National Electrical Code.

              (e)  Coaxial cable placed in SWBT's conduit system may carry
                   continuous DC voltages up to 1800 volts to ground where the
                   conductor current will not exceed one-half ampere and where
                   such cable has two separate grounded metal sheaths or shields
                   and a suitable insulating jacket over the outer sheath or
                   shield. The power supply shall be so designed and maintained
                   that the total current carried over the outer sheath shall
                   not exceed 200 microamperes under normal conditions.
                   Conditions which would increase the current over this level
                   shall be cleared promptly.

              (f)  The integrity of SWBT's conduit system and overall safety of
                   personnel require that "dielectric cable" be used within
                   SWBT's conduit system when a cable facility utilizes a duct
                   or route shared in the same trench by any electric
                   transmission facilities such as the facilities of a power
                   utility.

         6.06 Additional Physical Design Specifications: Conduit. Facilities
placed in SWBT's conduit system following the effective date of this Agreement
shall meet all of the following physical design specifications:

              (a)  Except as otherwise specifically agreed in this Agreement or
                   licenses subject to this Agreement, Applicant's facilities
                   shall enter SWBT's conduit system at locations consistent
                   with the physical design specifications that SWBT applies to
                   itself (typically through a manhole) or at such other
                   designated locations agreed upon in writing (e.g., through
                   the licensing process) by the parties in accordance with
                   Section 6.03 (infrequent construction techniques and
                   connectivity solutions).

              (b)  Cables bound or wrapped with cloth or having any kind of
                   fibrous coverings or impregnated with an adhesive material
                   shall not be placed in SWBT's conduit or ducts.


                                    PAGE 23

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              (c)  Neither party shall circumvent the corrosion mitigation
                   measures of the other party or joint users.

              (d)  New construction splices in cables (including but not limited
                   to fiber optic and twisted pair cables) shall be located in
                   manholes, pull boxes or handholes.

         6.07 Efficient Use of Conduit. To ensure efficient use of conduits,
SWBT will, when cable diameters permit, install inner ducts in multiples that
fully utilize duct space (typically three or four inner ducts in a full
four-inch duct) as needed for SWBT's own business purposes and to accommodate
Applicant and other joint users; provided, however, that SWBT will not be
required to install inner duct in advance of need or in anticipation of
potential future requests for access by Applicant and other joint users. In
addition, the parties shall, in accordance with SWBT's duct selection standards,
install cables in inner duct when cable diameters permit.

         6.08 Specifications Applicable to Connections: Conduit. Except as
otherwise specifically agreed in this Agreement or licenses subject to this
Agreement, or as mutually agreed upon by the parties in writing, the following
specifications apply to connections of Applicant's ducts and conduits to SWBT's
conduit system:

              (a)  Applicant shall not bore, make, or enlarge any hole in, or
                   otherwise structurally modify or alter any manhole, handhole,
                   duct, conduit, or other facility which is part of SWBT's
                   conduit system except as provided in this Agreement, in
                   licenses subject to this Agreement, or as mutually agreed
                   upon by the parties in writing.

              (b)  Nothing contained in subsection (a) shall be construed as
                   precluding Applicant or qualified personnel acting on
                   Applicant's behalf from reattaching cable racks or performing
                   similar routine work which is minor in nature and associated
                   with the placement and splicing of Applicant's cable.

              (c)  Where Applicant's duct or facility physically connects with
                   SWBT's conduit system, the section of Applicant's duct or
                   facility which connects to SWBT's conduit system shall be
                   installed by SWBT or its contractor at Applicant's expense
                   (which will be SWBT's actual costs or the price charged SWBT
                   by the contractor performing such work). SWBT will perform
                   this work in an interval consistent with the intervals SWBT
                   performs the same or similar types of work for itself. If
                   SWBT's interval for beginning or completing this work does
                   not meet Applicant's needs, Applicant may arrange for the
                   work to be performed by an authorized contractor selected by
                   Applicant from a list, jointly developed by Applicant and
                   SWBT, of mutually agreed contractors qualified to perform
                   such work. Work performed by an authorized 



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                   contractor selected by Applicant to perform work under this
                   subsection shall be performed in accordance with both
                   parties' specifications and in accordance with both parties'
                   standards and practices. Each party shall indemnify, on
                   request defend, and hold the other party harmless from any
                   injuries, losses, damages, claims, or liabilities resulting
                   from the performance of work by the indemnifying party or by
                   persons acting on the indemnifying party's behalf under this
                   subsection.

              (d)  SWBT will have the option to monitor the entrance and exit of
                   Applicant's facilities into SWBT's conduit system and the
                   physical placement of Applicant's facilities in and removal
                   of such facilities from any part of SWBT's conduit system.
                   Notice requirements for such monitoring are addressed in
                   Section 6.11 of this Agreement.

              (e)  If Applicant constructs or utilizes a duct (other than a duct
                   owned or controlled by SWBT) which is connected to SWBT's
                   conduit system, the duct and all connections between that
                   duct and SWBT's conduit system shall be sealed to prevent the
                   entry of gases or liquids into SWBT's conduit system. If
                   Applicant's duct enters a building, it shall also be sealed
                   where it enters the building and at all other locations
                   necessary to prevent the entry of gases and liquids into
                   SWBT's conduit system.

         6.09 General Requirements Relating to Personnel, Equipment, Materials,
and Public Safety. Except as otherwise specifically provided in this Agreement,
Applicant shall be responsible for selecting the employees and contractors who
will perform work on Applicant's behalf on, within, and in the vicinity of
SWBT's poles, ducts, conduits, and rights-of-way. Applicant, its contractors,
subcontractors, and other vendors acting on Applicant's behalf shall also be
responsible for selecting the personnel who perform work on Applicant's behalf
at such sites, directing the work performed by such personnel, compensating
their respective employees, and complying with all applicable laws, rules,
regulations, and agency orders relating to withholding taxes, social security
taxes, and other employment-related taxes. The provisions of this section are
intended to protect the integrity of the networks, facilities and operations of
SWBT, Applicant and joint users, to protect the health and safety of persons
working on, within, or in the vicinity of SWBT's poles, ducts, conduits, and
rights-of-way, to assure the financial responsibility of all persons and
entities performing work on, within, or in the vicinity of SWBT's poles, ducts,
conduits, and rights-of-way, and to protect the public at large. The
requirements of this section (other than the provisions of subsection (h)) shall
be reciprocal and shall apply to SWBT and personnel acting on SWBT's behalf to
the same extent they apply to Applicant.

              (a)  Contractors, subcontractors, and other vendors, including
                   authorized contractors, performing work on Applicant's behalf
                   on, within, or in the vicinity of SWBT's poles, ducts,
                   conduits, or rights-of-way shall meet 


                                    PAGE 25

<PAGE>   322

                   the same financial responsibility (insurance and bonding)
                   requirements generally applicable to contractors,
                   subcontractors, and vendors performing work on SWBT's behalf
                   on, within, or in the vicinity of such poles, ducts,
                   conduits, or rights-of-way. SWBT shall advise Applicant of
                   SWBT's requirements and any changes in such requirements.
                   Applicant shall be solely responsible for assuring compliance
                   with such requirements by contractors, subcontractors, and
                   other vendors acting on Applicant's behalf and shall be
                   liable to SWBT for any injury, loss, or damage suffered by
                   SWBT as a result of its failure to do so.

              (b)  Only properly trained persons shall work on, within, or in
                   the vicinity of SWBT's poles, ducts, conduits, and
                   rights-of-way. Applicant shall be responsible for determining
                   that all such persons acting on Applicant's behalf have
                   proper training.

              (c)  Neither Applicant nor any person acting on Applicant's behalf
                   shall permit any person to climb or work on SWBT's poles or
                   in the vicinity of SWBT's poles, or enter SWBT's manholes or
                   work within or in the vicinity of SWBT's conduit system,
                   unless such person has the training, skill, and experience
                   required to recognize potentially dangerous conditions
                   relating to the pole or conduit system and to perform the
                   work safely.

              (d)  Neither Applicant nor any person acting on Applicant's behalf
                   shall permit any person acting on Applicant's behalf to
                   perform any work on, within, or in the vicinity of SWBT's
                   poles, ducts, conduits, or rights-of way without first
                   verifying, to the extent practicable, on each date when such
                   work is to be performed, that conditions at the work site
                   (including but not limited to the physical condition of the
                   pole or any part of SWBT's conduit system) are sufficiently
                   safe for the work to be performed. If Applicant or any person
                   acting on Applicant's behalf determines that the condition of
                   any pole, duct, conduit, conduit system or right-of-way is
                   not safe enough for the work to be performed, Applicant shall
                   notify SWBT of conditions at the site and shall not proceed
                   with the work until Applicant is satisfied that the work can
                   be safely performed.

              (e)  Neither Applicant nor any person acting on Applicant's behalf
                   shall knowingly permit defective equipment or materials to be
                   used on, within or in the vicinity of SWBT's poles, ducts,
                   conduits, or rights-of-way.

              (f)  When Applicant or personnel performing work on Applicant's
                   behalf are working on, within, or in the vicinity of SWBT's
                   poles, ducts, 


                                     PAGE 26

<PAGE>   323

                   conduits, or rights-of-way located within, under, over,
                   adjacent to, or in the vicinity of streets, highways, alleys
                   or other traveled rights-of-way, such personnel shall follow
                   procedures which Applicant deems appropriate for the
                   protection of persons and property. Applicant and its
                   contractors shall be responsible, at all times, for
                   determining and implementing the specific steps required to
                   protect persons and property at the site. Applicant and its
                   contractors shall provide all traffic control and warning
                   devices required to protect pedestrian and vehicular traffic,
                   workers, and property from danger. Applicant and its
                   contractors shall have sole responsibility for the safety of
                   all personnel performing work on Applicant's behalf, for the
                   safety of bystanders, and for insuring that all operations
                   performed by persons acting on Applicant's behalf conform to
                   current OSHA regulations and all other governmental rules,
                   ordinances or statutes.

              (g)  Neither Applicant nor any persons acting on Applicant's
                   behalf shall engage in any conduct which damages public or
                   private property in the vicinity of SWBT's poles, ducts,
                   conduits, or rights-of-way, interferes with the use or
                   enjoyment of such public or private property except as
                   expressly permitted by the owner of such property, or creates
                   a hazard or nuisance on such property (including but not
                   limited to a hazard or nuisance resulting from any
                   abandonment of Applicant's facilities, failure to remove such
                   facilities or any construction debris from the property,
                   failure to erect warning signs or barricades as may be
                   necessary to exclude others from the premises or give notice
                   to others of unsafe conditions on the premises while work
                   performed on Applicant's behalf is in progress, or failure to
                   restore the property to a safe condition after such work has
                   been completed).

              (h)  Applicant shall promptly suspend activities on, within, or in
                   the vicinity of SWBT's poles, ducts, conduits, or
                   rights-of-way (other than sites owned or controlled by
                   Applicant) if notified by SWBT that such activities create an
                   unreasonable risk of injury to persons or property (including
                   unreasonable risks of service interruptions). Applicant shall
                   not resume such activities on or in the vicinity of SWBT's
                   poles or rights of-way until Applicant is satisfied that the
                   work may safely proceed and that any hazardous conditions at
                   the site have been rectified and shall not resume such
                   activities within or in the vicinity of SWBT's conduit system
                   until both Applicant and SWBT are satisfied that the work may
                   safely proceed and that hazardous conditions at the site have
                   been rectified. In the event that SWBT requires Applicant to
                   suspend work activities and it is later determined that there
                   was no reasonable basis for the work suspension, SWBT shall
                   reimburse Applicant for actual costs resulting from the
                   delay.


                                    PAGE 27

<PAGE>   324


              (i)  All personnel on Applicant's behalf shall, while working on
                   or in SWBT's poles, ducts, conduits, or rights-of-way, carry
                   with them suitable identification and shall, upon the request
                   of any SWBT employee or representative, produce such
                   identification.

              (j)  Applicant and persons acting on Applicant's behalf are
                   encouraged to report unsafe conditions on, within, or in the
                   vicinity of SWBT's poles or conduit system to SWBT.

              (k)  Applicant shall establish sufficient controls and safeguards
                   to assure compliance with all provisions of this section.

         6.10 Specific Requirements Relating to Personnel. Equipment, Materials,
and Construction Practices Within or in the Vicinity of SWBT's Conduit Systems.
When Applicant, its contractors, and other persons acting on Applicant's behalf
perform work for Applicant within or in the vicinity of SWBT's ducts, conduits,
and rights-of-way where such ducts or conduits are located, they will be guided
by the following:

              (a)  Except as may be mutually agreed upon by the parties in
                   writing, Applicant shall not "rod" or clear any duct or inner
                   duct in SWBT's conduit system other than a duct or inner duct
                   assigned to Applicant. Following the assignment of a specific
                   duct or inner duct to Applicant, Applicant may request that
                   SWBT rod or clear the duct or inner duct. If the duct or
                   inner duct cannot be cleared, SWBT will assign the next
                   available duct or inner duct to Applicant. Applicant's
                   request for assignment of the next available duct shall be in
                   writing, may be transmitted to SWBT via fax or other
                   transmission media mutually agreed upon by the parties, and
                   shall be processed within the same intervals applicable to
                   the processing of similar requests by SWBT's own personnel.

              (b)  Personnel performing work within SWBT's conduit system on
                   either party's behalf shall not climb on, step on, or
                   otherwise disturb the cables, air pipes, equipment, or other
                   facilities located in any manhole or other part of SWBT's
                   conduit system.

              (c)  Personnel performing work within or in the vicinity of SWBT's
                   conduit system (including any manhole) on either party's
                   behalf shall, upon completing their work, make reasonable
                   efforts to remove all tools, unused materials, wire
                   clippings, cable sheathing and other materials brought by
                   them to the work site.

              (d)  All of Applicant's facilities shall be firmly secured and
                   supported in accordance with Bellcore and industry standards
                   and any applicable 


                                    PAGE 28


<PAGE>   325

                   construction standards adopted by SWBT and applicable to
                   SWBT's own facilities.

              (e)  Applicant's facilities shall be plainly identified with
                   Applicant's name in each manhole with a firmly affixed
                   permanent tag that meets the identification standards set by
                   SWBT for its own facilities.

              (f)  Manhole pumping and purging required in order to allow
                   Applicant's work operations to proceed shall be performed by
                   Applicant or its contractor in accordance with the
                   requirements of Sections 6.14 and 6.15 of this Agreement.

              (g)  Planks or other types of platforms shall be supported only by
                   cable racks.

              (h)  Any leak detection liquid or device used by Applicant or
                   personnel performing work on Applicant's behalf within or in
                   the vicinity of SWBT's conduit system shall be of a type
                   approved by SWBT and included on SWBT's then-current list of
                   approved types of leak-detection liquids and devices;
                   provided, however, that Applicant may use any type of leak
                   detection liquid or device which meets Bellcore's published
                   standards if SWBT has not provided Applicant SWBT's list of
                   approved types of leak detection liquids or devices at least
                   60 days in advance of Applicant's work.

              (i)  Applicant and its contractors shall be responsible for
                   providing proper ventilation while work is being performed in
                   SWBT's conduit system on Applicant's behalf. Except for
                   protective screens, no temporary cover shall be placed over
                   an open manhole unless it is at least four feet above the
                   surface level of the manhole opening.

              (j)  Smoking or the use of any open flame is prohibited in
                   manholes, in any other portion of the conduit system, or
                   within 10 feet of any open manhole entrance.

              (k)  Artificial lighting, when required by Applicant, will be
                   provided by Applicant. Only explosion-proof lighting fixtures
                   shall be used.

              (l)  Neither Applicant nor personnel performing work on
                   Applicant's behalf shall allow any combustible gas, vapor,
                   liquid, or material to accumulate in SWBT's conduit system
                   (including any manhole) during work operations performed
                   within or in the vicinity of SWBT's conduit system.


                                    PAGE 29


<PAGE>   326


              (m)  Applicant shall comply with the standards set by SWBT for its
                   own personnel restricting the use of spark producing tools,
                   equipment, and devices (including but not limited to such
                   tools as electric drills and hammers, meggers, breakdown
                   sets, induction sets, and the like) in manholes and other
                   portions of SWBT's conduit system, provided that such
                   standards have been communicated in writing to Applicant at
                   least 60 days in advance of the construction, installation,
                   or placement of Applicant's facilities within SWBT's conduit
                   system.

              (n)  Cable lubricants used in conduit systems shall be of a type
                   or types approved by SWBT and included on SWBT's then-current
                   list of approved types of cable lubricants; provided,
                   however, that Applicant may use any type of cable lubricant
                   which meets Bellcore's published standards if SWBT has not
                   provided Applicant SWBT's list of approved types of cable
                   lubricants at least 60 days in advance of Applicant's work.

         6.11 Opening of Manholes and Access to Conduit. The following
requirements apply to the opening of SWBT's manholes and access to SWBT's
conduit system.

              (a)  Applicant will notify SWBT not less than 48 hours in advance
                   before entering SWBT's conduit system to perform
                   non-emergency work operations. Such operations shall be
                   conducted during normal business hours except as otherwise
                   agreed by the parties. The notice shall state the general
                   nature of the work to be performed. As a courtesy, Applicant
                   shall, when feasible, provide SWBT with 10 working days
                   advance notice before entering SWBT's conduit system. SWBT
                   shall, within 10 working days after the effective date of
                   this Agreement, advise Applicant of the manner in which
                   notices required by this section shall be given.

              (b)  An authorized employee or representative of SWBT may be
                   present as a construction inspector at any time when
                   Applicant or personnel acting on Applicant's behalf enter or
                   perform work within SWBT's conduit system. Such inspectors
                   may inspect the performance and quality of the work and
                   monitor the work for compliance with the terms, conditions,
                   and specifications of this Agreement or, in the case of
                   facilities modification, capacity expansion or make-ready
                   work, the plans and specifications of the facilities
                   modification, capacity expansion, or make-ready project. When
                   SWBT inspectors are present, Applicant and its contractors
                   shall have sole authority, responsibility, and control over
                   the method or manner by which the work is to be performed.
                   SWBT's inspectors may call violations to Applicant's
                   attention but shall have no authority to direct or advise
                   Applicant or personnel acting on Applicant's behalf
                   concerning the method or manner by which the work 
        
        



                                    PAGE 30


<PAGE>   327

                   is to be performed; provided, however, that nothing
                   contained in this subsection shall relieve Applicant from
                   complying with any requirements of this Agreement.
        
              (c)  The parties contemplate that Applicant may need to perform
                   operations in SWBT's conduit system other than during normal
                   business hours and may on occasion require access to manholes
                   on shorter notice than contemplated in subsection (a) above.
                   Under these circumstances, Applicant shall notify SWBT as
                   soon as is reasonably possible of its intent to enter and
                   perform work in the conduit system and SWBT shall not,
                   without due cause and justification, insist on literal
                   compliance with scheduling requirements of subsection (a).
                   SWBT will establish procedures enabling SWBT to receive
                   notices from Applicant under this subsection 24 hours a day,
                   seven days a week.

              (d)  Each party must obtain any necessary authorization from
                   appropriate authorities to open manholes for such party's own
                   conduit work and operations therein.

              (e)  Applicant shall reimburse SWBT for costs associated with the
                   presence of construction inspectors only as specified in
                   APPENDIX I and only as permitted by applicable laws, rules,
                   regulations, and commission orders. SWBT shall not charge
                   Applicant for more than one such construction inspector per
                   site at any given time.

              (f)  If the presence of SWBT personnel at the site is requested by
                   Applicant or, in Applicant's opinion, is integral to
                   successful completion of the work, Applicant shall pay the
                   costs of having such personnel present.

         6.12 OSHA Compliance. The parties agree that:

              (a)  facilities attached to SWBT's poles or placed in SWBT's
                   ducts, conduits, and rights-of-way shall be constructed,
                   placed, maintained, repaired, and removed in accordance with
                   the Occupational Safety and Health Act (OSHA) and all rules
                   and regulations promulgated thereunder;

              (b)  all persons acting on such party's behalf shall, when working
                   on, within, or in the vicinity of SWBT's poles, ducts,
                   conduits, or rights-of-way, comply with OSHA and all rules
                   and regulations thereunder; and

              (c)  Applicant shall establish appropriate procedures and controls
                   to assure compliance with all requirements of this section.


                                    PAGE 31


<PAGE>   328

         6.13 Hazardous Substances. Applicant acknowledges that, from time to
time, hazardous substances (as defined in Section 3.19 of this Agreement) may
enter SWBT's conduit system and accumulate in manholes or other conduit
facilities and that hazardous substances may be present at other sites where
SWBT's poles, ducts, conduits, or rights-of-way are located.

              (a)  Applicant may, at its expense, perform such inspections and
                   tests at the site of any pole, duct, conduit, or right-of-way
                   occupied by or assigned to Applicant as Applicant may deem
                   necessary to determine the presence at such sites of
                   hazardous substances. SWBT will assist Applicant, at
                   Applicant's request and expense, in the performance of such
                   inspections and tests.

              (b)  SWBT makes no representations to Applicant or personnel
                   performing work on Applicant's behalf that SWBT's poles,
                   ducts, conduits, or rights-of-way will be free from hazardous
                   substances at any particular time. Before entering a manhole
                   or performing any work within or in the vicinity of SWBT's
                   conduit system or any other site subject to access under this
                   Agreement, Applicant or personnel acting on Applicant's
                   behalf shall independently determine, to their satisfaction,
                   whether such hazardous substances are present and conduct
                   their work operations accordingly.

              (c)  Each party shall promptly notify the other of hazardous
                   substances known by such party to be present within or in the
                   vicinity of poles, ducts, conduits, or rights-of-way occupied
                   by or assigned to Applicant pursuant to this Agreement if, in
                   the sole judgment of such party, such hazardous substances
                   create a serious danger to (1) the health or safety of
                   personnel working within or in the vicinity of the conduit or
                   (2) the physical condition of the other party's facilities
                   placed or to be placed within the conduit.

              (d)  Nothing contained in this Agreement (including but not
                   limited to the acknowledgments and representations set forth
                   in this section) shall relieve either party from its
                   responsibility to comply with all applicable environmental
                   laws or its responsibility for any liability arising out of
                   such party's failure to comply with such laws. Nothing
                   contained in this Agreement shall be construed as relieving
                   SWBT of liability for hazardous substances present at any
                   site subject to this Agreement or as relieving either party
                   of liability for introducing hazardous substances to the site
                   or causing or contributing to the release of any such
                   substances. Failure to comply with the requirements of this
                   section may, however, be considered in determining issues
                   relating to negligence, causation of injury, and comparative
                   responsibility for injuries to persons, property, and the
                   environment.


                                    PAGE 32

<PAGE>   329

         6.14 Compliance with Environmental Laws and Regulations. Applicant and
SWBT agree to comply with the following provisions relating to compliance with
environmental laws and regulations.

              (a)  Facilities attached to SWBT's poles or placed in SWBT's
                   ducts, conduits, and rights-of-way following the effective
                   date of this Agreement shall be constructed, placed,
                   maintained, repaired, and removed in accordance with all
                   applicable federal, state, and local environmental statutes,
                   ordinances, rules, regulations, and other laws.

              (b)  All persons acting on Applicant's or SWBT's behalf, including
                   but not limited to the parties' employees, agents,
                   contractors, and subcontractors, shall, when working on,
                   within or in the vicinity of SWBT's poles, ducts, conduits,
                   or rights-of-way, comply with all applicable federal, state,
                   and local environmental laws, including but not limited to
                   all environmental statutes, ordinances, rules, and
                   regulations. Applicant and personnel acting on Applicant's
                   behalf are expected to be familiar with their obligations
                   under environmental laws such as the Comprehensive
                   Environmental Response, Compensation, and Liability Act (42
                   U.S.C. Sections 9601 et seq.), the Toxic Substance Control
                   Act (15 U.S.C. Sections 2601-2629), the Clean Water Act (33
                   U.S.C. Sections 1251 et seq.), and the Safe Drinking Water
                   Act (42 U.S.C. Sections 300f-300j).

              (c)  The parties shall each establish appropriate procedures and
                   controls to assure compliance with all requirements of this
                   section.

              (d)  From and after the effective date of this Agreement, neither
                   party nor personnel acting on either party's behalf shall
                   discharge or release hazardous substances onto or from the
                   site of any SWBT pole, duct, conduit, or right-of-way.
                   Neither Applicant nor SWBT nor personnel acting on either
                   party's behalf shall discharge water or any other substance
                   from any SWBT manhole or other conduit facility onto public
                   or private property, including but not limited to any storm
                   water drainage system, without first determining that such
                   discharge would not violate any environmental law, create any
                   environmental risk or hazard, or damage the property of any
                   person. Applicant will be expected to test such water or
                   substance for hazardous substances in accordance with
                   then-applicable SWBT standards and practices.

              (e)  Applicant and SWBT and all personnel performing work on
                   Applicant's or SWBT's behalf shall, when working on, within,
                   or in the vicinity of SWBT's poles, ducts, conduits, and
                   rights-of-way, comply with such additional standards,
                   practices, and requirements as SWBT may from time to time
                   adopt to comply with environmental laws, provided that 


                                    PAGE 33

<PAGE>   330


                   such standards are communicated in writing to Applicant at
                   least 60 days in advance of Applicant's work.

         6.15 Compliance with Other Governmental Requirements (Including
Aeronautical Navigation Safeguards). Facilities attached to SWBT's poles or
placed in SWBT's ducts, conduits, and rights-of-way shall be constructed,
placed, maintained, repaired, and removed in accordance with the ordinances,
rules, and regulations of any governing body having jurisdiction of the subject
matter (including but not limited to any valid ordinances, rules, and
regulations requiring permits, certificates, licenses or the like). Applicant
and SWBT shall comply with all statutes, ordinances, rules, regulations, and
other laws requiring the marking and lighting of aerial wires, cables, and other
structures to ensure that such wires, cables, and structures are not a hazard to
aeronautical navigation.

         6.16 Differences in Specifications. To the extent that there may be
differences in the specifications, the most stringent specification will apply
except as otherwise specifically provided by SWBT in writing. Applicant will
consult with SWBT when Applicant is uncertain as to which specification is to be
followed.

         6.17 Responsibility for the Condition of Facilities. Each party will be
responsible at all times for the condition of its facilities (including but not
limited to those extending from SWBT's poles, ducts, conduits, or rights-of-way
directly to any other location) and for its compliance with the requirements and
specifications of this article and all applicable laws, rules, regulations, and
ordinances.

            ARTICLE 7: PRIMARY POINTS OF CONTACT, ACCESS TO RECORDS,
                          AND PRE-OCCUPANCY INSPECTIONS

         7.01 Designation of Primary Points of Contact. Each party will, at the
request of the other party, designate a primary point of contact to facilitate
communications between the parties and the timely processing of Applicant's
applications for access to SWBT's poles, ducts, conduits, and rights-of-way
located within this State. Designations of primary points of contact will be
made by written notices including the name, title, address, phone number, and
fax number of the person designated as the primary point of contact; provided,
however, that unless and until a different designation is made, SWBT's primary
point of contact shall be the Utility Liaison Supervisor identified in APPENDIX
VIII. Designation of primary points of contact pursuant to this section will not
affect notice requirements or other legal requirements set forth in other
provisions of this Agreement.

         7.02 Determinations by Applicant of Suitability and Availability.
Applicant shall make its own, independent assessment of the suitability of
SWBT's poles, ducts, conduits, and rights-of-way for Applicant's intended
purposes.


                                    PAGE 34

<PAGE>   331

         7.03 Access to Records Relating to SWBT's Poles, Ducts, Conduits, and
Rights-of-Way. This section establishes procedures through which certain records
and information relating to SWBT's poles, ducts, conduits, and rights-of-way
will be made available to Applicant for planning and other purposes. Access to
such records and information will be conditioned on Applicant's execution of a
nondisclosure agreement equivalent in substance to the Nondisclosure Agreement
attached to this Agreement as APPENDIX V or such other nondisclosure agreement
as shall be mutually acceptable to the parties, and no person acting on
Applicant's behalf will be granted access to such records and information
without first signing such a nondisclosure agreement. Applicant will reimburse
SWBT for all reasonable costs incurred by SWBT in granting Applicant's requests
for access to records and information under this section.

              (a)  Applicant may, at any time after the effective date of this
                   Agreement, request permission to inspect SWBT's pole and
                   conduit maps and records, cable plat maps, and other plant
                   location records, if any, recording or logging assignments of
                   pole, duct, and conduit space. Applicant will be permitted to
                   examine these records during regular business hours at a
                   location where copies of such records are maintained or at
                   such other location as may be mutually agreed upon by the
                   parties. Access to such maps and records will be by
                   appointment only, and SWBT will make such maps and records
                   available for inspection by Applicant on two business days
                   advance notice; provided, however, that Applicant will, as a
                   courtesy, when feasible, provide SWBT with 10 business days
                   advance notice of its intent to examine such records.

              (b)  The access described in subsection (a) shall include the
                   right to make copies, at Applicant's expense, except for
                   cable plat maps, which shall be made available for inspection
                   only. In all instances, such access shall include the ability
                   to take notes and make drawings with references to those maps
                   and records. No references to cable counts or circuit
                   information may be included in any such copies, notes, or
                   drawings. With respect to other cable-specific or
                   customer-specific information, Applicant's copies, notes, or
                   drawings may include only such information as needed for bona
                   fide engineering and construction purposes (e.g., proposing
                   cable consolidations and identifying plant discrepancies)
                   and not for sales, marketing, competitive intelligence,
                   competitive analysis, strategic planning, and similar
                   activities. Applicant's copies, notes, and drawings may
                   include estimates regarding the physical characteristics
                   (such as size and weight) of cables when necessary to make
                   engineering determinations regarding the capacity, safety,
                   reliability, or suitability of SWBT's poles, ducts, conduits 
                   and rights-of-way for Applicant's intended uses.
        
              (c)  SWBT will provide Applicant the best information available
                   from SWBT's current pole and conduit maps and records, cable
                   plat maps, 


                                    PAGE 35

<PAGE>   332

                   and other outside plant and construction records. SWBT
                   represents that such records reflect approximate geographical
                   locations of the facilities depicted and may not accurately
                   reflect information such as:

                   (1)  the exact location of the facilities depicted;

                   (2)  the physical size, characteristics, or condition of the
                        facilities depicted;

                   (3)  the ducts or inner ducts presently occupied, assigned,
                        or available within any particular conduit segment or
                        manhole;

                   (4)  the arrangement of facilities attached to a pole, the
                        position of facilities suspended between poles or their
                        relationship to each other and to the ground, or the
                        positioning of cables and other facilities housed within
                        ducts, conduits, manholes or other portions of SWBT's
                        conduit system; and

                   (5)  other information which must be assessed before it can
                        be determined that space is available on or in a pole,
                        duct, or conduit for the attachment or occupancy of
                        Applicant's facilities or that the poles, ducts, or
                        conduits depicted are suitable for Applicant's intended
                        use.

         7.04 Pre-occupancy Inspection of Poles Ducts, Conduits, and
Rights-of-Way. Applicant shall be permitted to view and inspect specified poles,
ducts, conduits, and rights-of-way on a pre-occupancy basis as provided in this
section.

              (a)  After the effective date of this Agreement, Applicant may
                   view specified poles, ducts, conduits, and rights-of-way on a
                   pre-occupancy basis. Nothing contained in this section shall
                   preclude Applicant from visually inspecting SWBT's poles,
                   ducts, conduits, or rights-of-way from any vantage point
                   lawfully accessible to Applicant without SWBT's permission.

              (b)  Applicant shall not enter any SWBT manhole for the purpose of
                   performing a pre-occupancy inspection without complying with
                   all applicable requirements set forth in Article 6 of this
                   Agreement, including but not limited to the provisions of
                   Section 6.11 relating to the opening of manholes.

              ARTICLE 8: POLE, DUCT, AND CONDUIT SPACE ASSIGNMENTS

         8.01 Selection of Space. Applicant will select the space Applicant will
occupy on SWBT's poles or in SWBT's conduit systems. Applicant's selections will
be based 



                                    PAGE 36


<PAGE>   333

on the same criteria SWBT applies to itself. To enable Applicant to make such
selections in accordance with SWBT's criteria, SWBT will provide Applicant
information about the network guidelines and engineering protocols used by SWBT
in determining the placement of facilities on SWBT's poles and in SWBT's conduit
systems. In conduit systems owned or controlled by SWBT, maintenance ducts (as
defined in Section 3.25) shall not be considered available for Applicant's use
except as specifically provided elsewhere in this Agreement. All other ducts,
inner ducts, sub-ducts, and partitioned conduits which are not assigned or
occupied shall be deemed available for use by SWBT, Applicant, and third parties
entitled to access under the Pole Attachment Act.

         8.02 Pole, Duct, and Conduit Space Assignments. Pole, duct, and conduit
space selected by Applicant will be assigned to Applicant as provided in this
section. Information received by SWBT in connection with this section shall be
subject to the provisions of Article 28 of this Agreement (Confidentiality of
Information).

              (a)  After Applicant's application for a pole attachment or
                   conduit occupancy license has been received by SWBT, the
                   pole, duct, and conduit space selected by Applicant in such
                   application will be assigned to Applicant for a pre-occupancy
                   period not to exceed 12 months. The assignment (and date and
                   time of assignment) will be logged and recorded in the
                   appropriate SWBT records. If such space has been
                   provisionally assigned to Applicant as authorized below in
                   subsection (b), the 12-month pre-occupancy assignment period
                   will begin on the date the provisional assignment is recorded
                   in SWBT's records or the date of SWBT's receipt of
                   Applicant's notice of intent to occupy under subsection (b),
                   whichever date first occurs.

              (b)  SWBT shall, within 60 days after the effective date of this
                   Agreement, adopt interim procedures which will enable pole,
                   duct, and conduit space to be provisionally assigned to
                   Applicant and other applicants prior to the submission of
                   formal applications required pursuant to Section 9.02 of this
                   Agreement. Where indicated below, the interim procedures will
                   apply to the assignment of space to SWBT as well as to
                   Applicant and other applicants. SWBT may, on 60 days advance
                   notice to Applicant, revise such interim procedures if such
                   procedures prove to be unworkable, in which event Applicant
                   may challenge SWBT's decision in accordance with procedures
                   available to Applicant under applicable federal and state
                   laws and regulations. The procedures will enable Applicant
                   and other applicants, by written notice, to advise SWBT of
                   their intent to occupy unassigned space which appears, from
                   SWBT's records, to be available for assignment. Upon receipt
                   of such notice, SWBT shall date-and-time stamp the notice and
                   provisionally assign the space selected by Applicant or such
                   other applicant by logging and recording the assignment (and
                   date and time of assignment) in the appropriate SWBT records,
                   which records will be available for 

                                    PAGE 37


<PAGE>   334

                   inspection as provided in Section 7.03 of this Agreement.
                   Space provisionally assigned to Applicant or such other
                   applicant will not be available for assignment to any other
                   person or entity, including SWBT. Notwithstanding such
                   provisional assignment, Applicant shall not occupy such space
                   without first obtaining a license, except as provided in
                   Section 8.03. The following additional requirements shall
                   apply.

                   (1)  Before giving SWBT notice of its intent to occupy
                        unassigned space, Applicant shall make a good faith
                        determination that it actually plans to occupy such
                        space. The assignment process shall not be used by
                        either party for the purpose of holding or reserving
                        space which such party does not plan to use or for the
                        purpose of precluding SWBT or any other person or entity
                        from utilizing or having access to SWBT's poles, ducts,
                        conduits, or rights-of-way.

                   (2)  With respect to unassigned conduit occupancy space, the
                        notice must include all information required to enable
                        SWBT and joint users, including other persons or
                        entities which may from time to time seek space in the
                        same ducts and conduits, to determine the specific space
                        which Applicant desires to occupy. The notice must,
                        therefore, include, at a minimum, the following
                        information:

                        (i)   the specific conduit sections, and each manhole,
                              to be occupied;

                        (ii)  the number of ducts, and number of inner ducts, to
                              be occupied by Applicant within each conduit
                              section;

                        (iii) the physical size (diameter) of the cables to be
                              placed in such duct, if known, or the maximum and
                              minimum sizes of the cables which may be placed if
                              more than one size cable is being considered for
                              the space to be occupied;

                        (iv)  the anticipated use by Applicant of any infrequent
                              construction techniques and connectivity solutions
                              authorized under Section 6.03 to avoid high or
                              unusual expenditures;

                        (v)   Applicant's best estimates of the dates when
                              Applicant plans to begin and complete construction
                              at the sites specified in the notice;

                        (vi)  if applicable, a conspicuous statement that
                              Applicant intends to occupy the space before the
                              issuance of a license, as provided in Section 8.03
                              of this Agreement; and


                                    PAGE 38

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                        (vii) if applicable, a conspicuous statement, as
                              required by Section 5.06 of this Agreement, that
                              the notice pertains to a building entrance or
                              building distribution duct or conduit or other
                              space within a building.

                   (3)  With respect to unassigned pole space, such notice must
                        include all information required to enable SWBT and
                        other joint users, including other persons or entities
                        seeking space on the same poles, to determine the
                        specific space which Applicant desires to occupy. The
                        notice must, therefore, include, at a minimum, the
                        following information:

                        (i)   the specific poles to be occupied;

                        (ii)  the specific space on each pole to be occupied,
                              including the height (distance from the ground) of
                              the attachment and the side (road or field) where
                              the attachment is to be made;

                        (iii) the anticipated number and types of cables to be
                              attached, together with the anticipated physical
                              size (diameter) and weight (weight per foot) of
                              such cables, and the anticipated number and types
                              of strands, if any, to be used to support the
                              cables, such information to be sufficient to give
                              notice to SWBT and other joint users of the
                              remaining space on the pole available and what
                              facilities modification, capacity expansion, or
                              make-ready work may be required of subsequent
                              applicants as a result of the provisional
                              assignment of space to Applicant;

                        (iv)  the anticipated use by Applicant of any infrequent
                              construction techniques and connectivity solutions
                              authorized under Section 6.03 to avoid high or
                              unusual expenditures;

                        (v)   Applicant's best estimates of the dates when
                              Applicant plans to begin and complete construction
                              at the sites specified in the notice; and

                        (vi)  if applicable, a conspicuous statement that
                              Applicant intends to occupy the space before the
                              issuance of a license, as provided in Section 8.03
                              of this Agreement.

                   (4)  No later than 30 days after giving such notice,
                        Applicant shall file an application under Section 9.02
                        or the provisional assignment will lapse.


                                    PAGE 39

<PAGE>   336

                   (5)  As stated in Section 7.03(c), SWBT does not represent
                        that its records accurately reflect the information
                        necessary to enable Applicant to rely upon a
                        records-based assignment process. SWBT shall have no
                        duty to verify that space provisionally assigned
                        pursuant to this subsection is actually available.

              (c)  Assignments made prior to the issuance of a license will be
                   provisional assignments and will be subject to modification
                   if it is subsequently determined that the space selected by
                   or assigned to Applicant is already occupied or that a
                   different assignment is required to comply with SWBT's
                   standards for assigning pole, duct, and conduit occupancy
                   space.

              (d)  Applicant's obligation to pay semiannual pole attachment or
                   conduit occupancy fees will commence from the date of
                   assignment or provisional assignment, as logged and recorded
                   in the appropriate SWBT records.

              (e)  During the 12-month assignment period following the date
                   space is assigned to Applicant and entered into the
                   appropriate SWBT record, SWBT shall not occupy or use such
                   space without Applicant's permission, shall not assign such
                   space to any party other than Applicant, and shall not
                   knowingly permit any party other than Applicant to occupy or
                   use such space without Applicant's permission except as
                   otherwise specifically provided in this Agreement. The
                   assignment to Applicant will automatically lapse 12 months
                   after the date the assignment has been entered into the
                   appropriate SWBT record if Applicant has not occupied such
                   assigned space within such 12-month period; provided,
                   however, that if Applicant's failure to occupy the space
                   within such 12-month period results from SWBT's failure to
                   perform make-ready work on schedule, the parties shall
                   negotiate a single extension of the assignment period, which
                   extension shall not extend the assignment period beyond three
                   months from the date of completion of SWBT's make-ready work;
                   and, provided further, that if Applicant can demonstrate that
                   its failure to occupy the space within such 12-month period
                   results from the actions of SWBT or third parties other than
                   persons acting on Applicant's behalf, or from acts of God,
                   the assignment may be extended for a period no longer than
                   three months from the date Applicant is first able to
                   commence construction activities at the site involved.
                   Assignments to third parties shall be subject to the same
                   rules applicable to Applicant under this subsection.
                   Extensions permitted under this subsection must be requested
                   in writing before expiration of the original 12-month period
                   and shall be recorded on the appropriate SWBT records
                   available for inspection under Section 7.03.


                                    PAGE 40

<PAGE>   337

              (f)  SWBT may assign space to itself by making appropriate entries
                   in the same records used to log assignments to Applicant and
                   third parties. If SWBT assigns pole, duct, or conduit space
                   to itself, such assignment will automatically lapse 12 months
                   after the date the assignment has been entered into the
                   appropriate SWBT record if SWBT has not occupied such
                   assigned space within such 12-month period; provided,
                   however, that if SWBT's failure to occupy the space within
                   such 12-month period results from the actions of Applicant or
                   third parties other than persons acting on SWBT's behalf, or
                   from acts of God, SWBT's assignment may be extended for a
                   period no longer than three months from the date SWBT is able
                   to commence construction at the site involved. Extensions
                   permitted under this subsection must be recorded before
                   expiration of the original 12-month period on the appropriate
                   SWBT records available for inspection under Section 7.03.

              (g)  If facilities modifications, capacity expansions, or other
                   make-ready work are required due to the assignment of space
                   to either party under this section, the party to whom such
                   space has been assigned will reimburse the person or entity
                   incurring the costs for such facilities modifications,
                   capacity expansions, or make-ready work if the party to whom
                   such space has been assigned fails to occupy the assigned
                   space within the 12-month assignment period or any extension
                   thereof.

              (h)  Except as provided in subsections (e)-(f) above, assignments
                   shall not be extended, renewed, or sequentially repeated in
                   any manner (other than by actual occupancy) that enables
                   Applicant, SWBT, or any joint user to preclude access by
                   others to unused pole attachment or conduit occupancy space
                   for any period greater than 12 months after the date of
                   initial assignment.

              (i)  At Applicant's election, Applicant may file an application
                   for access which specifically requests that the space sought
                   by Applicant not be assigned to Applicant immediately and not
                   be recorded immediately in the SWBT records available for
                   inspection by other telecommunications carriers, cable
                   television systems, or other providers of telecommunications
                   services under Section 7.03 of this Agreement. In that event,
                   the space sought by Applicant will not be assigned to
                   Applicant and will remain available for assignment to others
                   without restriction until such time as such space is formally
                   assigned to Applicant in accordance with Applicant's written
                   instructions and the assignment is recorded in the records
                   available for inspection under Section 7.03. The assignment
                   shall be made no later than the date of issuance to Applicant
                   of a license confirming that Applicant has the right to
                   occupy the space described in the license. In the event that
                   Applicant elects to proceed under this subsection,
                   Applicant's obligation 


                                    PAGE 41

<PAGE>   338

                   to pay pole attachment and conduit occupancy fees shall not
                   commence until the date the assignment is recorded in the
                   appropriate SWBT records and Applicant shall bear the risks
                   that (1) the space sought by Applicant will be assigned to
                   and occupied by another person or entity or (2) circumstances
                   will occur which may require that SWBT reevaluate Applicant's
                   application and repeat the field inspection portion of the
                   pre-license survey at Applicant's expense.

              (j)  Notices and applications including assignment requests will
                   be date- and time-stamped on receipt. Because space will be
                   selected and further assignments made based on entries logged
                   and recorded in the appropriate SWBT records, the date and
                   time of assignment will be the date and time when the
                   assignment is recorded rather than the date and time of
                   receipt of the application or notice requesting such
                   assignment. Although SWBT's clerical personnel will promptly
                   process assignment requests included in applications and
                   notices transmitted to SWBT by mail, courier, fax, or other
                   transmission media, SWBT shall not be liable for any failure
                   by Applicant to obtain the space desired by Applicant due to
                   delay in logging assignment requests. Applicant acknowledges
                   that, to maximize the probability that Applicant will be
                   assigned the space Applicant desires, Applicant should, when
                   possible, submit applications and notices including
                   assignment requests in person to SWBT at the site where the
                   applicable records are maintained and should countersign the
                   entry reflecting the assignment and time of assignment.

         8.03 Immediate Occupancy. SWBT shall, within 60 days after the
effective date of this Agreement, adopt interim procedures which will provide
Applicant the ability to attach or place facilities on or in SWBT's poles,
ducts, conduits, and rights-of-way on an immediate basis when such space is
available for Applicant's use and no make-ready work or infrequent construction
techniques or connectivity solutions are required. SWBT may, on 60 days advance
notice to Applicant, revise or terminate such interim procedures if they prove
to be unworkable, in which event Applicant may seek renegotiation of this
Agreement or challenge SWBT's decision in accordance with procedures available
to Applicant under applicable federal and state laws, regulations, and
commission orders. The special procedures established under this section shall
supplement, rather than replace, the regular assignment and licensing procedures
set forth in Articles 8-10 of this Agreement, are intended to be used only under
special circumstances (e.g., when the regular procedures allow insufficient time
to meet customer service commitments or resolve non-routine construction or
network contingencies), shall not be used on a routine basis, and shall be
consistent with subsections (a)-(f) below.

              (a)  Upon giving SWBT the notice required by this subsection,
                   Applicant may immediately occupy space assigned or
                   provisionally assigned to 

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<PAGE>   339
                   Applicant pursuant to Section 8.02 of this Agreement. The
                   notice shall be contained in either a notice of intent to
                   occupy as provided in Section 8.02(b) or a license
                   application under Section 9.02. Applicant shall not give such
                   notice or occupy such space without first reviewing SWBT's
                   records and determining that the records reflect that the
                   space sought is available.

              (b)  Applicant shall not occupy space which has not been assigned
                   or provisionally assigned to Applicant. The assignment must
                   be recorded on the appropriate SWBT records, as provided in
                   Section 8.02, prior to Applicant's occupancy. If Applicant
                   subsequently determines that the records are inaccurate and
                   that the space assigned to Applicant is not available, or
                   that the space assigned is not suitable for Applicant's
                   intended use, Applicant shall, within one business day,
                   notify SWBT in writing that it no longer intends to occupy
                   the space earlier assigned and is releasing the assignment.
                   Except as otherwise provided in this subsection, Applicant
                   shall not occupy other space on the pole or in the duct or
                   conduit without first obtaining an assignment or provisional
                   assignment of the space which Applicant will occupy. To avoid
                   high or unusual expenditures resulting from unanticipated
                   conditions at the site, Applicant may occupy space not
                   assigned to Applicant subject to the following terms and
                   conditions.

                   (1)  Applicant may occupy the next available space shown on
                        SWBT's records as available at the time of Applicant's
                        last review of the records. Applicant shall not
                        knowingly occupy space occupied by or assigned to SWBT
                        or any third party without consent of the party to whom
                        the space has been assigned.

                   (2)  Within one business day after occupying such space,
                        Applicant shall submit to SWBT a written notice of
                        intent to occupy or an application for the space
                        occupied showing the reason for Applicant's use of the
                        space occupied.

                   (3)  Applicant shall bear the risk that space occupied by
                        Applicant pursuant to this section was assigned to SWBT
                        or a third party during the period between Applicant's
                        last review of the records and Applicant's occupancy of
                        such space. After occupying space not previously
                        assigned to Applicant, Applicant shall review the
                        records and promptly notify the affected party if
                        Applicant determines that it has occupied space assigned
                        to such party. At the request of the party to whom such
                        space has been assigned, Applicant shall, within 24
                        hours, or within such other period of time mutually
                        agreed to by the parties affected, remove its facilities
                        from the space in question if the parties affected
                        cannot reach an acceptable alternative solution. 


                                    PAGE 43


<PAGE>   340

                        SWBT and Applicant anticipate that all parties affected
                        will act in good faith to work out acceptable solutions
                        and that the parties affected will not insist on strict
                        adherence to the 24-hour removal requirement unless
                        there is a legitimate business need for compelling
                        removal within such time period.

                   (4)  SWBT shall be entitled to recover from Applicant actual
                        costs, if any, directly incurred by SWBT as a result of
                        Applicant's decision under this subsection to occupy
                        subject to a valid prior assignment to SWBT. Applicant
                        shall indemnify, on request defend, and save SWBT
                        harmless from any injury, loss, damage, liability, or
                        claim asserted against SWBT by any third party resulting
                        from Applicant's decision under this subsection to
                        occupy space assigned to such third party.

              (c)  Nothing in this section authorizes Applicant to place its
                   facilities on or in any pole, duct, or conduit space already
                   occupied by the facilities of SWBT or a third party, even if
                   the presence of such facilities is not reflected on SWBT's
                   records.

              (d)  Nothing in this section authorizes Applicant, without first
                   obtaining SWBT's written authorization, to (1) place its
                   facilities on any pole or in any duct or conduit that
                   requires make-ready work (other than third-party make-ready
                   work arranged directly by Applicant) or (2) utilize any
                   infrequent construction technique or connectivity solution
                   described in Section 6.03.

              (e)  If Applicant has not done so already, within 24 hours after
                   occupying space pursuant to this section, Applicant will
                   submit to SWBT an application for the space occupied as
                   provided in Section 9.02 of this Agreement. The application
                   may be submitted by fax.

              (f)  Applicant will bear all risks resulting from the possibility
                   that assigned space which appears from the records to have
                   been available is not available or in suitable condition to
                   be used by Applicant and shall indemnify, on request defend,
                   and hold SWBT harmless from any injury, loss, damage, claim,
                   or liability (including but not limited to third-party
                   claims) resulting from Applicant's occupancy of space in
                   violation of this section.

                 ARTICLE 9: APPLICATIONS AND PRE-LICENSE SURVEYS

         9.01 Licenses Required. Except as otherwise specifically permitted in
this Agreement, Applicant shall apply in writing for and receive a license
before attaching facilities to specified SWBT poles or placing facilities within
specified SWBT ducts, 

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<PAGE>   341



conduits, manholes, or handholes. License applications and information received
by SWBT in connection with such applications shall be subject to the provisions
of Article 28 of this Agreement (Confidentiality of Information).

         9.02 Application Form. To apply for a pole attachment or conduit
occupancy license under this Agreement, Applicant shall submit to SWBT two
signed copies of the appropriate application forms. SWBT represents that the
forms specified in subsections (a)-(b) are forms in use prior to the effective
date of this Agreement and that SWBT is in the process of revising such forms to
conform to the provisions of this Agreement and to streamline the application
process. The parties therefore agree that the forms specified in subsections (a)
and (b) will be interim forms only. SWBT reserves the right to change the format
and content of these forms upon 60 days written notice to Applicant.

              (a)  To apply for a pole attachment license, Applicant shall
                   submit to SWBT two signed copies of SWBT's Form SW-9434
                   ("Access Application and Make-Ready Authorization") together
                   with completed Form SW-9433 ("Pole Attachments "). An
                   application for a pole attachment license will not be
                   complete or subject to processing by SWBT until these forms
                   have been submitted to SWBT; provided, however, that such
                   forms will be deemed to be substantially complete if they
                   contain the information specified in subsections (c)-(h)
                   below, as applicable. Copies of Forms SW-9433 and SW-9434 are
                   attached to this Agreement as parts of APPENDIX III.

              (b)  To apply for a conduit occupancy license, Applicant shall
                   submit to SWBT two signed copies of SWBT's Form SW-9434
                   ("Access Application and Make-Ready Authorization") together
                   with completed Form SW-9435 ("Conduit Occupancy"). An
                   application for a conduit occupancy license will not be
                   complete or subject to processing by SWBT until these forms
                   have been submitted to SWBT; provided, however, that such
                   forms will be deemed to be substantially complete if they
                   contain the information specified in subsections (c)-(h)
                   below, as applicable. Copies of Forms SW-9434 and SW-9435 are
                   attached to this Agreement as parts of APPENDIX III.

              (c)  Each application for a license under this Agreement shall
                   include, at a minimum, the following information:

                   (1)  the poles, ducts, and conduits (including all manholes)
                        along Applicant's proposed route to or within which
                        Applicant desires to attach or place its facilities;

                   (2)  a description of the facilities to be attached to SWBT's
                        poles and a description of the facilities to be placed
                        within each component of

                                    PAGE 45

<PAGE>   342

                        SWBT's conduit system (including but not limited to
                        ducts, conduits, manholes, and handholes) along the
                        proposed route;

                   (3)  for poles, the proposed points of attachment;

                   (4)  for building entrance or building distribution ducts or
                        conduits or other space within a building, a conspicuous
                        statement, as required by Section 5.06 of this
                        Agreement, that the application pertains to a building
                        entrance or building distribution duct or conduit or
                        other space within a building;

                   (5)  if applicable, a conspicuous notation that the space
                        requested is not to be assigned (or billed) to Applicant
                        until SWBT has received Applicant's written instruction
                        to make such assignment or issued a license authorizing
                        Applicant to occupy the space requested; and

                   (6)  if applicable, a conspicuous statement that Applicant
                        intends to occupy the space before the issuance of a
                        license, as provided in Section 8.03 of this Agreement.

              (d)  Facilities descriptions which apply to multiple pole
                   attachments or conduit occupancies need only be described
                   once on any form. Facilities descriptions shall include, at a
                   minimum, the following information:

                   (1)  the number and types of cables, including the physical
                        size (diameter) and weight (weight per foot);

                   (2)  the number and types of strands, if any, which will be
                        used to support the cables, including the rated holding
                        capacity expressed in thousand pound increments (e.g.,
                        2.2M of such strands; and

                   (3)  sufficient information to identify and describe the
                        physical characteristics (size, dimensions, and weight)
                        of apparatus enclosures and other facilities to be
                        attached to SWBT's poles or placed in SWBT's conduit
                        system.

              (e)  When it appears to Applicant that facilities modification,
                   capacity expansion, or make-ready work may be required to
                   accommodate Applicant's access requests, Applicant shall
                   describe the facilities modification, capacity expansion, or
                   make-ready work which Applicant proposes. Applicant shall
                   also describe its plans, if any, to use any infrequent
                   construction technique or connectivity solution authorized
                   under Section 6.03 to avoid high or unusual expenditures and
                   state its reasons for the use of such technique or solution.


                                    PAGE 46

<PAGE>   343

              (f)  Applicant acknowledges that the poles along a particular pole
                   line or route may include poles owned by firms (such as
                   electric utilities) other than SWBT, that it may be necessary
                   for SWBT to rearrange its facilities or perform other
                   make-ready work on poles other than poles it owns or controls
                   in order to accommodate Applicant's request for access to
                   SWBT's poles and that, at the time an application is
                   submitted, it may be difficult for Applicant to determine
                   with certainty whether a particular pole is owned or
                   controlled by SWBT or by another entity. Accordingly, the
                   application shall, to the extent feasible, identify all poles
                   utilized by SWBT (without regard to ownership) along
                   Applicant's proposed route.

              (g)  Each application for a license under this Agreement shall be
                   accompanied by a construction schedule showing Applicant's
                   projected dates for beginning and completing construction at
                   the sites specified in the application. Information on this
                   schedule may be used by SWBT's engineering and outside plant
                   construction personnel in scheduling work required to process
                   Applicant's applications and scheduling such capacity
                   expansions, make-ready work, and facilities modifications, if
                   any, as may be necessary to accommodate Applicant's
                   facilities.

              (h)  Applicant may include multiple cables in a single license
                   application and may provide multiple services (e.g., CATV and
                   non-CATV services) under the same cable sheath or jacket.
                   When both CATV and non-CATV services are provided under the
                   same cable sheath or jacket, or CATV and non-CATV services
                   are provided using different cables attached or lashed to the
                   same strand or otherwise occupying the same space on a pole
                   or the same duct or inner duct within a conduit, Applicant
                   will so advise SWBT and SWBT shall, if permitted by law,
                   adjust its charges to enable SWBT to charge Applicant the
                   rate applicable to telecommunications carriers rather than
                   the rate applicable to cable television systems solely to
                   provide cable service.

         9.03 Cooperation in the Application Process. The orderly processing of
applications submitted by Applicant and other firms seeking access to SWBT's
poles, ducts, conduits, and rights-of-way requires good faith cooperation and
coordination between SWBT's personnel and personnel acting on behalf of
Applicant and other firms seeking access. The parties therefore agree to the
following transitional procedures which will remain in effect during the term of
this Agreement unless earlier modified by mutual agreement of the parties.

              (a)  Before submitting a formal written application for access to
                   SWBT's poles, ducts, conduits, and rights-of-way, the firm
                   submitting the application shall make a good faith
                   determination that it actually plans 


                                    PAGE 47


<PAGE>   344


                   to attach facilities to or place facilities within the poles,
                   ducts, conduits, or rights-of-way specified in the
                   application. Applications shall not be submitted for the
                   purpose of holding or reserving space which the applicant
                   does not plan to use or for the purpose of precluding SWBT or
                   any other provider of telecommunications or cable television
                   services from using such poles, ducts, conduits, or
                   rights-of-way.

              (b)  Applicant shall only submit applications for access to poles,
                   ducts, conduits, and rights-of-way which it plans to use
                   within one year following the date access is granted and
                   shall use its best efforts to submit applications in an
                   orderly manner in accordance with Applicant's needs. If
                   Applicant contemplates the need to submit more than 10
                   applications within any 45-day period with respect to poles,
                   ducts, conduits, and rights-of-way within the territory of
                   any single SWBT construction district, Applicant shall give
                   SWBT advance notice as promptly as is reasonably practicable.

              (c)  No more than 300 poles shall be the subject of any single
                   pole attachment license application.

              (d)  No more than 20 manholes shall be the subject of any single
                   conduit occupancy license application.

         9.04 Applicant's Priorities. When Applicant has multiple applications
on file within a single SWBT construction district, Applicant shall, at SWBT's
request, designate its desired priority of completion of pre-license surveys,
facilities modifications, capacity expansions, and make-ready work with respect
to all such applications.

         9.05 Pre-license Survey. A pre-license survey (including a review of
records and field inspection, if necessary) will be completed by SWBT after
Applicant has submitted its written license application as specified in Section
9.02 of this Agreement. SWBT shall not, without due cause and justification,
repeat pre-occupancy survey work performed by Applicant.

              (a)  The field inspection portion of the pre-license survey, which
                   includes the visual inspection of existing pole and conduit
                   facilities, shall be performed by SWBT or its authorized
                   representative. Primary purposes of the field inspection will
                   be to enable SWBT to (1) confirm or determine the facilities
                   modification, capacity expansion, and make-ready work if any,
                   necessary to accommodate Applicant's facilities; (2) plan and
                   engineer the facilities modification, capacity expansion, and
                   make-ready work, if any, required to prepare SWBT's poles,
                   ducts, conduits, rights-of-way, and associated facilities for
                   Applicant's proposed attachments or occupancy; and (3)
                   estimate the costs



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<PAGE>   345

                   associated with such facilities modification, capacity
                   expansion, or make-ready work. SWBT may dispense with the
                   field inspection if it appears that the information necessary
                   to process Applicant's license application is already
                   available from existing sources, including the application
                   forms and such other information as may be available to SWBT.
                   If Applicant has occupied the space requested before the
                   issuance of a license, a post-installation inspection of
                   Applicant's facilities may be performed, in place of the
                   field inspection portion of the pre-license survey, to
                   determine whether such facilities are in compliance with the
                   specifications of Article 6 and other provisions of this
                   Agreement. In performing such inspection, SWBT will not,
                   without due cause and justification, repeat pre-occupancy
                   survey work performed by Applicant.

              (b)  The administrative processing portion of the pre-license
                   survey (which includes processing the application and
                   reviewing records) will be performed by SWBT.

              (c)  Before performing any portion of the pre-license survey, SWBT
                   shall obtain Applicant's written authorization to perform
                   such work. Authorization may be given, when possible, when
                   the application is submitted. No authorization shall be
                   required for post-installation inspections of Applicant's
                   facilities when installation has occurred before the issuance
                   of a license.

                   ARTICLE 10: ISSUANCE AND DENIAL OF LICENSES
                      (INCLUDING FACILITIES MODIFICATIONS,
                    CAPACITY EXPANSIONS, AND MAKE-READY WORK)

         10.01 Response Within 45 Days. Within 45 days of Applicant's submission
of a license application pursuant to Section 9.02 of this Agreement, or within
such other period of time as may be mutually agreed upon in writing by the
parties, SWBT shall respond to the application. The response shall state whether
the application is being granted or denied. If denial is anticipated, or if SWBT
personnel involved in the processing of Applicant's request for access become
aware of hazardous substances at the site requested by Applicant, SWBT shall
promptly advise Applicant and shall, at Applicant's request, discuss
alternatives to denial and issues associated with the presence of such hazardous
substances. Additional state-specific response and notice requirements, if any,
shall be addressed by an addendum to this Agreement.

              (a)  If access is granted, SWBT shall, no later than 45 days after
                   Applicant's submission of the license application, further
                   advise Applicant in writing (1) what facilities
                   modifications, capacity expansions, or make-ready work, if
                   any, will be required to prepare SWBT's pole or conduit
                   facilities, (2) provide Applicant an estimate of charges for
                   such facilities 

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                   modifications, capacity expansions, or make-ready work and
                   (3) disclose to Applicant any hazardous substances known by
                   SWBT to be present at the site.

              (b)  SWBT may take into account issues of capacity, safety,
                   reliability, and engineering when considering requests for
                   access, provided the assessment of such factors is done in a
                   nondiscriminatory manner. If access is denied, SWBT shall
                   confirm the denial in writing by the 45th day after the
                   receipt by SWBT of Applicant's completed application. A
                   denial of access shall be specific, shall include all
                   relevant evidence and information supporting the denial, and
                   shall explain how such evidence and information relates to a
                   denial of access for reasons of lack of capacity, safety,
                   reliability, or generally applicable engineering purposes. If
                   Applicant in its completed application sets forth in writing
                   specific proposals for expanding capacity, the denial
                   statement shall specifically address such proposals.

              (c)  Applicant agrees that if, at any time prior to the 45th day,
                   it has determined that it no longer seeks access to specific
                   poles, ducts, or conduit facilities, Applicant shall promptly
                   withdraw or amend its application, thereby minimizing the
                   administrative burdens on SWBT of processing and responding
                   to the application.

              (d)  Notwithstanding the 45-day deadline, SWBT will, pursuant to
                   Section 8.03 of this Agreement, make available to Applicant
                   for immediate occupancy any pole, duct, or conduit space
                   which is not currently assigned, not designated as a
                   maintenance duct, and not subject to applicable make-ready
                   requirements.

              (e)  If SWBT fails to respond in writing within 30 days of SWBT's
                   documented receipt of a license application pursuant to
                   Section 9.02 of this Agreement, or within such other period
                   of time as may be mutually agreed upon in writing by the
                   parties, Applicant may by written notice inquire whether SWBT
                   intends to deny Applicant's request for access. After such
                   notice has been given and receipt by SWBT of a properly
                   submitted license application has been confirmed, SWBT's
                   failure to respond in writing within 15 days after receipt of
                   the notice shall be deemed to constitute approval of the
                   request for access. In such event, Applicant shall be
                   entitled to occupy the space requested without the formality
                   of a license; provided, however, that nothing contained in
                   this subsection shall authorize Applicant to occupy space
                   already occupied or subject to a prior valid space assignment
                   to SWBT or any third-party; and provided further that nothing
                   in this subsection authorizes Applicant, without first
                   obtaining SWBT's written authorization, to (1) place its
                   facilities on any pole or in any duct or conduit that
                   requires 


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<PAGE>   347

                   make-ready work (other than third-party make-ready work
                   arranged directly by Applicant) or (2) utilize any infrequent
                   construction technique or connectivity solution described in
                   Section 6.03.

         10.02 Obligation to Construct or Modify Facilities; Capacity 
Expansions. SWBT may grant access subject to Applicant's approval of such
make-ready work (including facilities modifications) as may be required to
expand capacity to accommodate Applicant's request, in which event Applicant
shall either accept such conditions, initiate good faith negotiations to
explore other potential accommodations, or withdraw its request for access. If
SWBT does not offer to expand capacity and denies Applicant's request for
access, SWBT shall promptly notify Applicant of such determination. SWBT shall
not deny Applicant's request for access on lack of capacity grounds when
capacity can be expanded as provided in this section and in Section 6.03
(infrequent construction techniques and connectivity solutions).

              (a)  At Applicant's request, SWBT will replace, expand, or modify
                   its poles and conduit system, or otherwise expand the
                   capacity of such facilities to accommodate the placement of
                   Applicant's facilities; provided, however, that such
                   modifications shall be consistent with the capacity, safety,
                   reliability, and engineering considerations which SWBT would
                   apply to itself if the work were performed for SWBT's own
                   benefit. Outside plant facilities modifications and capacity
                   expansions contemplated by this subsection include, but are
                   not limited to, installation of inner duct, cable
                   consolidations and the removal of cables that are retired or
                   inactive (dead). Except as otherwise specifically provided in
                   this section, SWBT may recover from Applicant the costs of
                   facilities modifications and capacity expansions to make
                   space available for Applicant's facilities and charges for
                   such modifications and expansions shall be determined and
                   billed as provided in APPENDIX I of this Agreement.

              (b)  SWBT will, at its own expense, install inner duct in SWBT's
                   conduit system as necessary to make Space available for
                   Applicant's facilities. Inner duct installations to
                   accommodate Applicant's facilities will be performed by SWBT
                   within the same time intervals which would apply if SWBT were
                   performing such installations for itself. If SWBT's intervals
                   for beginning or completing inner duct installation do not
                   meet Applicant's needs, Applicant may arrange for the inner
                   duct installation to be performed by an authorized contractor
                   selected by Applicant from a list, jointly developed and
                   maintained by the parties, of contractors mutually approved
                   as qualified to perform inner duct installations. Applicant
                   may install the inner duct itself if Applicant is on the list
                   of mutually approved contractors at the time the work is
                   performed. When inner duct is installed in SWBT's conduit
                   system by Applicant or an authorized contractor selected by
                   Applicant, SWBT will provide the


                                    PAGE 51

<PAGE>   348

                   inner-ducting materials to be installed and Applicant shall
                   bear all other installation expenses. Applicant shall give
                   SWBT sufficient advance notice of the materials needed to
                   enable SWBT to provide such materials to Applicant on a
                   timely basis. Applicant shall return all unused materials,
                   including unused inner duct and reels, to SWBT or purchase
                   them from SWBT. Inner duct installed by Applicant or an
                   authorized contractor selected by Applicant shall be
                   installed in accordance with SWBT's specifications and in
                   accordance with the same standards and practices which would
                   be followed if the inner duct were being installed by SWBT or
                   SWBT's contractors. Applicant shall indemnify, on request
                   defend, and hold SWBT harmless for any injuries, losses,
                   damages, claims, or liabilities directly resulting from the
                   installation of inner duct by Applicant or any authorized
                   contractor selected by Applicant under this subsection.
                   Applicant shall not, without SWBT's prior written approval,
                   arrange for inner duct installation to be performed by
                   subcontractors who are not authorized contractors.

              (c)  SWBT shall, at its expense, remove cables that are retired or
                   inactive (dead) to free-up requested duct and pole space,
                   provided that such removal is reasonably feasible (i.e.,
                   cable pulls easily without incident). If a section of cable
                   is "frozen" in a duct and would require excavation to remove,
                   Applicant may, at its option, request that SWBT excavate the
                   obstruction or, in the alternative, arrange for excavation of
                   the obstruction to be performed by an authorized contractor
                   selected by Applicant from a list, jointly developed and
                   maintained by the parties, of contractors mutually approved
                   as qualified to perform such excavations. Applicant may
                   excavate the obstruction itself if Applicant is on the list
                   of mutually approved contractors at the time the work is
                   performed. Such excavations will be at Applicant's expense.
                   Removal of the remainder of the cable will be at SWBT's
                   expense. Excavation work performed by Applicant or an
                   authorized contractor selected by Applicant shall be
                   performed in accordance with SWBT's specifications and in
                   accordance with the same standards and practices which would
                   be followed if such excavation work were being performed by
                   SWBT or SWBT's contractors. Neither Applicant nor any
                   authorized contractor selected by Applicant to perform
                   excavation work under this subsection shall conduct facility
                   excavation activities in any manner which jeopardizes or
                   degrades the integrity of SWBT's structures or interferes
                   with any existing use of the facilities. Applicant shall
                   indemnify, on request defend, and hold SWBT harmless for any
                   injuries, losses, damages, claims, or liabilities directly
                   resulting from the performance of excavation work by
                   Applicant or any authorized contractor selected by Applicant
                   under this subsection. Applicant shall not, without SWBT's
                   prior written approval, arrange for excavation work to be
                   performed 

                                    PAGE 52


<PAGE>   349

                   under this subsection by subcontractors who are not qualified
                   contractors.

         10.03 Issuance of Licenses and Immediate Access When No Make-ready Work
is Required. If, on the basis of Applicant's representations or SWBT's field
inspection, if any, SWBT determines that no make-ready work is necessary to
accommodate Applicant's facilities, SWBT will issue a license without performing
make-ready work and pole attachment or conduit occupancy space will be made
available to Applicant for immediate occupancy. Immediate occupancy prior to the
issuance of a license shall be governed by Section 8.03.

         10.04 Make-ready Work. If SWBT determines that make-ready work will be
necessary to accommodate Applicant's facilities, SWBT shall promptly notify
Applicant of the make-ready work proposed to enable the accommodation of
Applicant's facilities.

              (a)  The notice shall be given in writing no later than 45 days
                   after the receipt by SWBT of Applicant's completed
                   application pursuant to Section 9.02 of this Agreement or
                   within such other period of time as may be mutually agreed
                   upon in writing by the parties.

              (b)  The notice will include SWBT's estimate of make-ready
                   charges, which estimate shall be stated on SWBT Form SW-9434
                   ("Access Application and Make-Ready Authorization"), a copy
                   of which is attached hereto as part of APPENDIX III.

              (c)  Applicant shall have 20 days (the "acceptance period") after
                   receiving SWBT's estimate of make-ready charges to authorize
                   completion of the make-ready work proposed by SWBT or to
                   advise SWBT of is willingness to perform the proposed
                   make-ready work itself. If Applicant advises SWBT that it is
                   willing to perform the make-ready work proposed by SWBT in
                   accordance with SWBT's plans and specifications, SWBT will
                   not, without due cause and justification, refuse to accept
                   Applicant's offer to perform the work. Authorization shall be
                   accomplished by Applicant's signing the estimate and
                   returning it to SWBT within the 20-day acceptance period.

              (d)  Within the 20-day acceptance period, the parties may
                   negotiate modifications of the make-ready work to be
                   performed. If the parties reach agreement through
                   negotiation, a new estimate shall be prepared and
                   authorization shall be accomplished by Applicant's signing
                   the revised estimate and returning it to SWBT within the
                   original 20-day acceptance period, or within such period of
                   time as may be mutually agreed upon by the parties.


                                    PAGE 53

<PAGE>   350

              (e)  If Applicant does not sign and return the estimate within the
                   20-day acceptance period, or within such other period of time
                   as may be mutually agreed upon in writing by the parties,
                   Applicant shall notify SWBT in writing by the 20th day
                   whether Applicant is withdrawing its application, electing to
                   perform the make-ready work itself as provided in subsection
                   (c) or electing to treat SWBT's make-ready requirements as a
                   denial of access.

                   (1)  If no such notice is given by the 20th day, or such
                        later date as may be mutually agreed upon by the
                        parties, SWBT shall contact Applicant to determine
                        whether Applicant intends to withdraw its application.
                        Applicant shall be deemed to have withdrawn its
                        application if, in response to SWBT's inquiry, Applicant
                        does not immediately sign and return the estimate to
                        SWBT.

                   (2)  If Applicant timely notifies SWBT that it is electing to
                        treat SWBT's make-ready requirements as a denial of
                        access, SWBT shall, within 20 days after receiving the
                        notice, provide Applicant with a written statement
                        explaining its decision to grant access only if the
                        specified make-ready work is performed. The statement
                        shall be specific, shall include all relevant evidence
                        and information supporting SWBT's decision to grant
                        access only if the specified make-ready work is
                        performed, and shall explain how such evidence and
                        information relates to SWBT's decision for reasons of
                        lack of capacity, safety, reliability, or generally
                        applicable engineering purposes. The statement shall
                        also set forth the basis for SWBT's make-ready proposals
                        and specifically address SWBT's rationale for rejecting
                        Applicant's alternative written proposals, if any.

         10.05 Performance of Make-ready Work. Except as otherwise specifically
provided in Section 10.02 and in this section, make-ready work shall be
performed by SWBT or by contractors, subcontractors, or other persons acting on
SWBT's behalf and shall be performed by SWBT in accordance with the same time
intervals which would be applicable if SWBT were performing the work for itself.

              (a)  Applicant and SWBT will mutually establish and maintain for
                   each SWBT construction district lists of authorized
                   contractors which may be selected by Applicant to perform
                   make-ready work when SWBT's interval for beginning or
                   completing such make-ready work does not meet Applicant's
                   needs. At Applicant's request, Applicant will be included on
                   such lists upon Applicant's demonstrating that (1) its
                   personnel are qualified to perform such work in accordance
                   with SWBT's specifications and (2) Applicant meets the
                   financial responsibility (insurance and bonding) requirements
                   generally applicable to contractors, subcontractors, and
                   other vendors performing 

                                    PAGE 54

<PAGE>   351

                   the same or similar work on SWBT's behalf or the
                   self-insurance requirements of Section 23.02.

              (b)  If SWBT's interval for beginning or completing make-ready
                   work does not meet Applicant's needs, Applicant may (1)
                   perform the make-ready work itself, if Applicant is on the
                   applicable list of authorized contractors at the time the
                   work is to be performed or (2) arrange for the work to be
                   performed by an authorized contractor selected by Applicant
                   from the applicable list of authorized contractors. Subject
                   to the availability of personnel, Applicant may also request
                   that SWBT perform the work on an expedited basis; provided,
                   however, that make-ready work will not be performed on an
                   expedited basis unless Applicant first approves any overtime
                   or premium rates or charges associated with performance of
                   the work on an expedited basis.

              (c)  From time to time, additional contractors, subcontractors or
                   other vendors may be jointly approved by Applicant and SWBT
                   to perform specific make-ready work in the event that the
                   work load exceeds the capacity of the authorized contractors
                   on the approved list to perform the make-ready work in a
                   timely manner.

              (d)  Make-ready work performed by Applicant, by an authorized
                   contractor selected by Applicant, or by a contractor,
                   subcontractor, or other vendor jointly approved by the
                   parties under subsection (c) shall be performed in accordance
                   with SWBT's specifications and in accordance with the same
                   standards and practices which would be followed if such
                   excavation work were being performed by SWBT or SWBT's
                   contractors. Neither Applicant nor authorized contractors
                   selected by Applicant to perform make-ready work under this
                   section shall conduct such work in any manner which
                   jeopardizes or degrades the integrity of SWBT's structures or
                   interferes with any existing use of SWBT's facilities.
                   Applicant and any authorized contractor selected by Applicant
                   to perform make-ready work shall indemnify, on request
                   defend, and hold SWBT harmless from any and all injuries,
                   losses, damages, claims, or liabilities directly resulting
                   from their activities under this section.

              (e)  Nothing contained in this section authorizes Applicant, any
                   authorized contractor selected by Applicant, or any other
                   person acting on Applicant's behalf to consolidate SWBT's
                   cables.

         10.06 Multiple Applications. Applications shall be processed on a
first-come, first-served basis. Applications filed on the same date shall be
treated as having been filed simultaneously and shall be processed accordingly.

                                    PAGE 55

<PAGE>   352

         10.07 Payments to Others for Expenses Incurred in Transferring or
Arranging Their Facilities. Applicant shall make arrangements with the owners of
other facilities attached to SWBT's poles or occupying space in SWBT's conduit
system regarding reimbursement for any expenses incurred by them in transferring
or rearranging their facilities to accommodate the attachment or placement of
Applicant's facilities to or in SWBT's poles, ducts, and conduits.

         10.08 Reimbursement for the Creation or Use of Additional Capacity. As
a result of facilities modification, capacity expansion, or other make-ready
work performed to accommodate Applicant's facilities, additional capacity may
become available on SWBT's poles or in its conduit system. In such event,
Applicant shall not have a preferential right to utilize such additional
capacity in the future and shall not be entitled to any pole attachment or
conduit occupancy fees subsequently paid to SWBT for the use of such additional
capacity. SWBT shall, however, establish procedures for giving Applicant notice
of the subsequent use by SWBT or third parties of additional space or capacity
created at Applicant's expense. If SWBT utilizes additional space or capacity
created at Applicant's expense, SWBT will reimburse Applicant on a pro-rata
basis for SWBT's share, if any, of Applicant's capacity expansion costs, to the
extent reimbursement is required by the Pole Attachment Act and applicable
rules, regulations, and commission orders. If any third party later utilizes any
such additional space or capacity, SWBT shall, at the request of Applicant or
such third party, provide such information as may be available to SWBT to assist
Applicant and such third party in determining the amount, if any, which such
third party may owe Applicant as its pro-rata share of Applicant's capacity
expansion costs. Nothing contained in this section shall be construed as
conferring or imposing on SWBT any right or duty to determine the amounts owing
by a third party to Applicant, to collect or remit any such amounts to
Applicant, to resolve or adjudicate disputes over reimbursement between
Applicant and third parties, to deny a third party access to SWBT's poles,
ducts, conduits, or rights-of-way due to such third party's failure to satisfy
Applicant's reimbursement demands, or to take any other action to enforce
Applicant's reimbursement rights against any third party. In like manner, for
additional capacity created by SWBT from and after the date of enactment of the
Telecommunications Act of 1996, SWBT shall be entitled to recover from Applicant
and third parties, to the full extent permitted by law, their pro-rata shares of
such capacity expansion costs incurred by SWBT. To the extent that either party
seeks to avail itself of this cost-saving mechanism, such party shall be
responsible for maintaining adequate records documenting the costs subject to
reimbursement, including but not limited to costs incurred for facilities
modification and capacity expansion work performed directly by such party or
contractors performing work on such party's behalf.

         10.09 License and Attachment. After all required make-ready work is
completed, SWBT will issue a license confirming that Applicant may attach
specified facilities to SWBT's poles or place specified facilities in SWBT's
conduit system. Applicant shall have access to attach or place only those
facilities specifically described in licenses subject to this Agreement, and no
others, except as otherwise specifically provided in (a) Sections 8.03 and 12.03
or other provisions of this Agreement, (b) any other written 

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<PAGE>   353

agreement between the parties providing for such access, or (c) the provisions
of any applicable tariffs or commission orders.

               ARTICLE 11: CONSTRUCTION OF APPLICANT'S FACILITIES

         11.01 Responsibility for Attaching and Placing Facilities. Each party
shall be responsible for the actual attachment of its own facilities to SWBT's
poles and the placement of such facilities in SWBT's ducts, conduits, and
rights-of-way and shall be solely responsible for all costs and expenses
incurred by it or on its behalf in connection with such activities. In this
regard, each party and its contractors shall be solely responsible for (a)
paying all persons and entities who provide materials, labor, access to real or
personal property, or other goods or services in connection with the
construction and attachment of its facilities and (b) directing the activities
of all personnel acting on such party's behalf while they are physically present
on, within, or in the vicinity of SWBT's poles, ducts, conduits, and
rights-of-way.

         11.02 Construction Schedule. After the issuance of a license, Applicant
shall provide SWBT with an updated construction schedule and thereafter keep
SWBT informed of anticipated changes in the construction schedule. Construction
schedules received by SWBT shall be subject to the provisions of Article 28 of
this Agreement (Confidentiality of Information). Construction schedules required
by this section shall include, at a minimum, the following information:

              (a)  the name, title, business address, and business telephone
                   number of the manager responsible for construction of the
                   facilities;

              (b)  the names of each contractor and subcontractor which will be
                   involved in the construction activities;

              (c)  the estimated dates when construction will begin and end; and

              (d)  the approximate dates when Applicant or personnel working on
                   Applicant's behalf will be performing construction work in
                   connection with the attachment of Applicant's facilities to
                   SWBT's poles or the placement of Applicant's facilities in
                   any part of SWBT's conduit system.

                     ARTICLE 12: USE AND ROUTINE MAINTENANCE
                           OF APPLICANT'S FACILITIES

         12.01 Use of Applicant's Facilities. Each license subject to this
Agreement authorizes Applicant to have access to Applicant's facilities on or
within SWBT's poles, ducts, and conduits as needed for the purpose of serving
Applicant's customers.

                                    PAGE 57

<PAGE>   354

         12.02 Routine Maintenance of Applicant's Facilities. Each license
subject to this Agreement authorizes Applicant to engage in routine maintenance
of facilities located on or within SWBT's poles, ducts, and conduits. Routine
maintenance does not include the replacement or modification of Applicant's
facilities in any manner which results in Applicant's facilities differing
substantially in size, weight, or physical characteristics from the facilities
described in Applicant's license.

         12.03 Installation of Drive Rings and J-Hooks. Applicant may install
drive rings and J-hooks on SWBT's poles for the attachment of drop wires as
specified in this section.

              (a)  Drive rings and J-hooks may be installed as specified in pole
                   attachment licenses issued to Applicant.

              (b)  If attachment space has already been licensed to Applicant on
                   a given SWBT pole, Applicant may install drive rings and
                   J-hooks within the space assigned to Applicant (typically six
                   inches above and six inches below Applicant's point of
                   attachment on the pole if the point of attachment is in the
                   center of the space assigned to Applicant) without applying
                   for or obtaining a new or amended license. No additional
                   attachment charges shall apply with respect to drive rings
                   and J-hooks installed in Applicant's licensed attachment
                   space.

              (c)  Applicant's first choice for placement of drive rings and
                   J-hooks shall be the licensed attachment space assigned to
                   Applicant as provided in subsection (b) above; provided,
                   however, that if attachment space already licensed to
                   Applicant on a given SWBT pole is not adequate for
                   Applicant's drive rings or J-hooks, Applicant may, when
                   necessary, and without applying for or obtaining a new or
                   amended license, install such drive rings and J-hooks above
                   or below Applicant's licensed attachment space as described
                   in subsection (b) above. No additional attachment charges
                   shall apply with respect to drive rings and J-hooks installed
                   outside Applicant's licensed attachment space as permitted in
                   this subsection.

              (d)  If Applicant has not already been licensed attachment space
                   on a given SWBT pole, Applicant may, when necessary, install
                   drive rings and J-hooks to unassigned space on such pole
                   without first obtaining a license for such attachment and
                   shall, promptly following such installation, notify SWBT of
                   the attachment. Such notification shall be made on a form to
                   be developed by SWBT for this purpose and shall constitute an
                   application for a license. Such application may be
                   conditionally granted without a pre-license survey or other
                   inquiry by SWBT, and SWBT shall not be required to process
                   the application, log the attachment as an assignment in its
                   outside plant records, or issue a permanent license for


                                    PAGE 58
<PAGE>   355


                   the attachment unless specifically requested by Applicant
                   to do so; provided, however, that a conditionally granted
                   application under this subsection shall be subject to
                   revocation if it is subsequently determined that such
                   attachment has been made in violation of subsection (e) of
                   this section or other provisions of this Agreement.
                   Drive-rings and J-hooks installed pursuant to this subsection
                   are pole attachments and charges for such attachments shall
                   be determined in accordance with the Pole Attachment Act and
                   applicable rules, regulations, and commission orders.

              (e)  Notwithstanding the provisions of subsections (c)-(d) above,
                   Applicant may not install drive rings and J-hooks in space
                   assigned to SWBT or another joint user without the approval
                   of SWBT or such other joint user and may not install drive
                   rings and J-hooks in unassigned space in any manner which
                   will block or preclude the subsequent occupancy or use of
                   space by SWBT or other joint users. If the presence of
                   Applicant's facilities in space not assigned to Applicant
                   will block or preclude the use of assigned or otherwise
                   assignable space by SWBT or other joint users, Applicant
                   shall, on SWBT's request, promptly relocate the facilities in
                   order to accommodate the facilities of other users and shall
                   bear all expenses associated with such relocation.

              (f)  SWBT may not install drive rings or J-hooks in space assigned
                   to Applicant without Applicant's approval and shall, at
                   Applicant's request, and at SWBT's expense, promptly relocate
                   or, if necessary, remove, any drive rings or J-hooks
                   installed in violation of this subsection. If SWBT drive
                   rings or J-hooks have been installed in space subsequently
                   assigned to Applicant, or if the presence of SWBT drive rings
                   or J-hooks blocks or precludes the use of otherwise
                   assignable space on SWBT's poles, SWBT shall, at Applicant's
                   request, relocate such facilities, if it is feasible to do
                   so, as make-ready work.

              (g)  Applicant shall, at the request of SWBT or another joint
                   user, at Applicant's expense, promptly relocate or, if
                   necessary, remove any drive rings and J-hooks placed on
                   SWBT's poles other than as permitted in this section.

         12.04 Short-term Use of Maintenance Ducts for Repair and Maintenance
Activities. Maintenance ducts shall be available, on a nondiscriminatory basis,
for short-term (not to exceed 30 days) non-emergency maintenance or repair
activities by any person or entity (including but not limited to SWBT,
Applicant, other local service providers, and other joint users) with facilities
in the conduit section in which the maintenance duct is located; provided,
however, that use of the maintenance duct for non-emergency maintenance and
repair activities must be scheduled by SWBT. A person or entity using the
maintenance duct for non-emergency maintenance or repair 

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activities shall immediately notify SWBT of such use and must either vacate the
maintenance duct within 30 days or, with SWBT's consent, which consent shall not
be unreasonably withheld, rearrange its facilities to ensure that at least one
full-sized replacement maintenance duct (or, if the designated maintenance duct
was an inner duct, a suitable replacement inner duct) is available for use by
all occupants in the conduit section within 30 days after such person or entity
occupies the maintenance duct. Cables temporarily placed in the maintenance duct
on a non-emergency basis shall be subject to such accommodations as may be
necessary to rectify emergencies which may occur while the maintenance duct is
occupied.

         12.05 Responsibility for Maintenance of Facilities. Each party shall be
solely responsible for maintaining its own facilities and (a) paying all persons
and entities who provide materials, labor, access to real or personal property,
or other goods or services in connection with the maintenance of such party's
facilities and (b) directing the activities of all such personnel while they are
physically present on, within, or in the vicinity of SWBT's poles, ducts,
conduits, and rights-of-way.

         12.06 Information Concerning the Maintenance of Applicant's Facilities.
Promptly after the issuance of a license, Applicant shall provide SWBT with the
name, title, business address, and business telephone number of the manager
responsible for routine maintenance of Applicant's facilities and shall
thereafter notify SWBT of changes to such information. The manager responsible
for routine maintenance of Applicant's facilities shall, on SWBT's request,
identify any contractor, subcontractor, or other person performing maintenance
activities on Applicant's behalf at a specified site.

               ARTICLE 13: MODIFICATION OF APPLICANT'S FACILITIES

         13.01 Notification of Planned Modifications. Applicant shall notify
SWBT in writing at least 30 days before adding to, relocating, replacing or
otherwise modifying its facilities already attached to a SWBT pole or located in
any SWBT duct or conduit. The notice shall contain sufficient information to
enable SWBT to determine whether the proposed addition, relocation, replacement,
or modification is within the scope of Applicant's present license or requires a
new or amended license. No notice shall be required for such routine
modifications as the installation or placement of drive rings or J-hooks,
terminals, and other ancillary apparatus routinely used in providing service to
customers, having no effect on the structural integrity of SWBT's poles, ducts,
or conduits, and having no effect on the ability of SWBT or joint users to use
or have access to SWBT's poles, ducts, conduits, or rights-of-way.

         13.02 New or Amended License Required. A new or amended license will be
required if the proposed addition, relocation, replacement, or modification:

              (a)  requires that Applicant occupy additional space on SWBT's
                   poles (except on a temporary basis in the event of an
                   emergency);

                                    PAGE 60

<PAGE>   357

              (b)  requires that Applicant occupy additional space (other than
                   space in the maintenance duct in accordance with Sections
                   12.04, 13.03, and 15.02 of this Agreement) in any SWBT duct
                   or conduit except on a temporary basis in the event of an
                   emergency;

              (c)  results in the facilities attached to SWBT's poles or placed
                   in SWBT's ducts or conduits being different from those
                   described in Applicant's current license (e.g., different
                   duct or size increase causing a need to recalculate storm
                   loadings, guying, or pole class); or

              (d)  requires additional holding capacity on a permanent basis.

         13.03 Use of Maintenance Duct in Connection with Facility Modifications
and Replacements. Non-emergency access to the maintenance duct in connection
with facilities modifications and replacements shall be subject to the
provisions of Section 12.04 of this Agreement.

         13.04 Replacement of Facilities and Spinning/Overlashing Additional
Cables. Applicant may replace existing facilities with new facilities occupying
the same pole, duct, or conduit space, and may spin or overlash additional
cables to its own existing facilities; provided, however, that such activities
shall not be considered to be routine maintenance and shall be subject to the
requirements of this article.

         13.05 Streamlined Procedures for the Issuance of Amended Licenses. SWBT
may streamline procedures for the issuance of amended licenses with respect to
proposed additions, relocations, replacements, or modifications of Applicant's
facilities when it appears to SWBT that the proposed additions, relocations,
replacements, or modifications will not require make-ready work by SWBT, will
not interfere with SWBT's use of its poles, conduit systems, or facilities
attached or connected thereto or contained therein, and will not interfere with
the use of existing facilities attached or connected thereto or contained
therein by joint users.

                       ARTICLE 14: REQUIRED REARRANGEMENTS
                            OF APPLICANT'S FACILITIES

         14.01 Notice of Planned Modifications. The parties acknowledge that the
Pole Attachment Act recites in part that "Whenever the owner of a pole, duct,
conduit, or right-of-way intends to modify or alter such pole, duct, conduit, or
right-of-way, the owner shall provide written notification of such action to any
entity that has obtained an attachment to such conduit or right-of-way so that
such entity may have a reasonable opportunity to add to or modify its existing
attachment." The parties further acknowledge that the FCC, in the First
Interconnection Order in CC Docket No. 96-98, recites that "... absent a private
agreement establishing notification procedures, written notification of a
modification must be provided to parties holding attachments on the facility to
be modified at least 60 days prior to the commencement of the physical


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<PAGE>   358

modification itself." This article is intended by the parties to alter the
above-described notification requirements only as provided in Section 14.02(b)
below.

         14.02 Required Rearrangement of Applicant's Facilities. Applicant
acknowledges that, from time to time, it may be necessary or desirable for SWBT
to rearrange facilities on or within its poles or conduit systems, change out
poles, add poles to a pole line, relocate or reconstruct poles, pole lines,
conduit segments, or conduit runs, enlarge manholes, reinforce conduit, or
otherwise modify poles, pole lines, or portions of its conduit system and that
such changes may be necessitated by SWBT's own business needs or by factors
outside of SWBT's control, such as the decision by a municipality to widen
streets or the decision by a third party to seek access to SWBT's poles, ducts,
conduits, or rights-of-way.

              (a)  Applicant agrees that Applicant will cooperate with SWBT and
                   joint users in making such rearrangements as may be necessary
                   to enable such changes to be made and that costs incurred by
                   Applicant in making such rearrangements shall, in the absence
                   of a specific agreement to the contrary, be borne by the
                   parties in accordance with then applicable statutes, rules,
                   regulations, and commission orders, including the Pole
                   Attachment Act, rules, regulations, and commission orders
                   thereunder.

              (b)  Whenever feasible, SWBT shall give Applicant not less than 60
                   days prior written notice of the need for Applicant to
                   rearrange its facilities pursuant to this section. The notice
                   shall state the date by which such rearrangements are to be
                   completed. Applicant shall complete such rearrangements
                   within the time prescribed in the notice. SWBT may request
                   that such modification be made within a shorter period of
                   time, in which event Applicant shall not refuse to comply
                   such request without due cause and justification. In
                   determining due cause and justification, the following
                   factors, among others, may be considered:

                   (1)  the circumstances under which the rearrangements are
                        sought (e.g., street-widening project, request by a
                        competing provider for access);

                   (2)  the timeliness of SWBT's request to Applicant;

                   (3)  the nature and number of rearrangements sought;

                   (4)  the impact on the ability of the parties and joint users
                        to meet customer service needs; and

                   (5)  risks of service interruption to customers of the
                        parties and joint users.

              (c)  Nothing contained in this article shall preclude Applicant
                   from advising





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<PAGE>   359
                           SWBT, within 60 days from the date of the notice, of
                           its desire to add to or modify its existing
                           attachment.

                  ARTICLE 15:  EMERGENCY REPAIRS AND POLE REPLACEMENTS

         15.01 Applicability. The parties acknowledge that in the event of an
emergency, services provided by the parties and joint users to their respective
customers may be interrupted, that it may not be possible for all service
providers with facilities attached to SWBT's poles or placed in SWBT's ducts,
conduits, or rights-of-way to restore service to all customers at the same time,
that disputes may arise between the parties concerning the manner in which
emergency repairs shall be made, that it is essential that decisions be made
quickly, and that it is highly desirable that all service providers utilizing
SWBT's poles, ducts, conduits, and rights-of-way enter into appropriate
arrangements relating to emergency repairs and service restoration. In the
absence of prearranged agreements, it is expected that disputes will be
immediately resolved at the site by the affected parties present based upon the
criteria set forth in Section 15.05 of this Agreement. The provisions of this
article shall apply in the absence of more comprehensive agreements relating to
emergency repairs.

         15.02 Responsibility for Emergency Repairs; Access to Maintenance Duct.
In general, each party shall be responsible for making emergency repairs to its
own facilities and for formulating appropriate plans and practices enabling such
party to make such repairs.

                  (a)      Nothing contained in this Agreement shall be
                           construed as requiring either party to perform any
                           repair or service restoration work of any kind with
                           respect to the other party's facilities or the
                           facilities of joint users.

                  (b)      Maintenance ducts shall be available, on a
                           nondiscriminatory basis, for emergency repair
                           activities by any person or entity (including but not
                           limited to SWBT, Applicant, other local service
                           providers, and other joint users) with facilities in
                           the conduit section in which the maintenance duct is
                           located; provided, however, that a person or entity
                           using the maintenance duct for emergency repair
                           activities shall immediately notify SWBT of such use
                           and must either vacate the maintenance duct within 30
                           days or, with SWBT's consent, which consent shall not
                           be unreasonably withheld, rearrange its facilities to
                           ensure that at least one full-sized replacement
                           maintenance duct (or, if the designated maintenance
                           duct was an inner duct, a suitable replacement inner
                           duct) is available for use by all occupants in the
                           conduit section within 30 days after such person or
                           entity occupies the maintenance duct. The parties
                           agree not to exceed 30 days' use except in unusual
                           emergencies that may require longer than 30 days to
                           rectify.



                                    PAGE 63



<PAGE>   360





                  (c)      If necessary, other unoccupied ducts or inner ducts
                           may be used on a short-term basis when the
                           maintenance duct is unavailable. Any such use shall
                           be subject to the same rules applicable to the
                           maintenance duct and shall be subject to the rights
                           of any party or joint user to whom such duct or inner
                           duct has been assigned.

         15.03 Designation of Emergency Repair Coordinators and Other
Information. For each SWBT construction district, Applicant shall provide SWBT
with the emergency contact number of Applicant's designated point of contact for
coordinating the handling of emergency repairs of Applicant's facilities and
shall thereafter notify SWBT of changes to such information.

         15.04 Reporting of Conditions Requiring Emergency Repairs. As a
courtesy, each party shall endeavor to notify the other party at the earliest
practicable opportunity after discovering any condition on or in any of SWBT's
poles, ducts, conduits, or rights-of-way requiring emergency repairs to the
other party's facilities.

         15.05 Order of Precedence of Work Operations; Access to Maintenance
Duct and Other Unoccupied Ducts in Emergency Situations. When notice and
coordination are practicable, SWBT, Applicant, and other affected parties shall
coordinate repair and other work operations in emergency situations involving
service disruptions. Disputes will be immediately resolved at the site by the
affected parties present in accordance with the following principles.

                  (a)      Emergency service restoration work requirements shall
                           take precedence over other work operations.

                  (b)      Except as otherwise agreed upon by the parties,
                           restoration of lines for emergency services providers
                           (e.g., 911, fire, police, and hospital lines) shall
                           be given the highest priority and temporary occupancy
                           of the maintenance duct (and, if necessary, other
                           unoccupied ducts) shall be assigned in a manner
                           consistent with this priority. Secondary priority
                           shall be given to restoring services to the local
                           service providers with the greatest numbers of local
                           lines out of service due to the emergency being
                           rectified. The parties shall exercise good faith in
                           assigning priorities, shall base their decisions on
                           the best information then available to them at the
                           site in question, and may, by mutual agreement at the
                           site, take other factors into consideration in
                           assigning priorities and sequencing service
                           restoration activities.

                  (c)      SWBT shall determine the order of precedence of work
                           operations and assignment of duct space in the
                           maintenance duct (and other unoccupied ducts) only if
                           the affected parties present are unable to reach
                           prompt agreement; provided, however, that these
                           decisions shall be made by 


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                           SWBT on a nondiscriminatory basis in accordance with 
                           the principles set forth in this section.

         15.06 Unilateral Corrective Action. When either party reasonably
believes that, due to the condition of the other party's facilities placed on,
within, or in the vicinity of SWBT's poles, ducts, conduits, or rights-of-way,
there is an immediate or imminent threat to the safety or health of employees or
any other person, to the physical integrity or functioning of either party, or
either party's ability to meet its service obligations, either party may
unilaterally perform such limited corrective work as may be necessary to prevent
or mitigate against the injury threatened. For example, if facilities of the
other party have become detached or partially detached from a pole, or detached
or partially detached from supporting racks or wall supports within a manhole,
either party may reattach them as provided in this section but shall not be
obligated to do so.

                  (a)      Before performing any corrective work involving
                           facilities of the other party, SWBT or Applicant
                           shall first attempt to notify the other party. After
                           such notice has been given, the parties shall
                           coordinate corrective work.

                  (b)      When an emergency situation exists such that advance
                           notice and coordination are not practicable, either
                           party may perform corrective work without first
                           giving notice to the other party and shall promptly
                           notify the other party of the corrective work
                           performed and the reason why notice was not given.

         15.07 Emergency Pole Replacements. Applicant will cooperate fully with
SWBT when emergency pole replacements are required.

                  (a)      When emergency pole replacements are required, SWBT
                           shall promptly make a good faith effort to contact
                           Applicant to notify Applicant of the emergency and to
                           determine whether Applicant will respond to the
                           emergency in a timely manner.

                  (b)      If notified by SWBT that an emergency exists which
                           will require the replacement of a pole, Applicant
                           shall transfer its facilities immediately, provided
                           such transfer is necessary to rectify the emergency.
                           If the transfer is to a SWBT replacement pole, the
                           transfer shall be in accordance with SWBT's placement
                           instructions.

                  (c)      If Applicant is unable to respond to the emergency
                           situation immediately, Applicant shall so advise SWBT
                           and thereby authorize SWBT (or any joint user sharing
                           the pole with SWBT) to perform such
                           emergency-necessitated transfers (and associated
                           facilities rearrangements) on Applicant's behalf.



                                    PAGE 65


<PAGE>   362




         15.08 Expenses Associated with Emergency Repairs. Each party shall bear
all reasonable expenses arising out of or in connection with emergency repairs
of its own facilities and transfers or rearrangements of such facilities
associated with emergency pole replacements made in accordance with the
provisions of this article.

                  (a)      Each party shall be solely responsible for paying all
                           persons and entities who provide materials, labor,
                           access to real or personal property, or other goods
                           or services in connection with any such repair,
                           transfer, or rearrangement of such party's
                           facilities.

                  (b)      Applicant shall reimburse SWBT for the costs incurred
                           by SWBT for work performed by SWBT on Applicant's
                           behalf in accordance with the provisions of this
                           article; provided, however, that when the costs
                           incurred by SWBT are for work performed in part for
                           Applicant and in part for SWBT and third parties,
                           Applicant shall only reimburse SWBT for Applicant's
                           pro-rata share of the costs.

            ARTICLE 16: INSPECTION BY SWBT OF APPLICANT'S FACILITIES

         16.01 SWBT's Right to Make Periodic or Spot Inspections. SWBT shall
have the right, but not the duty, to make periodic or spot inspections at any
time of any or all facilities attached to SWBT's poles or placed within SWBT's
poles, ducts, conduits, or rights-of-way. Inspections of Applicant's facilities
may be conducted for the purpose of determining whether facilities attached to
SWBT's poles or placed in SWBT's conduit system are in compliance with the terms
of this Agreement and conform to licenses subject to this Agreement. Charges for
inspections shall be allocated among all parties benefiting from the inspection
in accordance with the Pole Attachment Act and applicable rules, regulations,
and commission orders. When an inspection is conducted for the specific purpose
of auditing or investigating Applicant's compliance with this Agreement, SWBT
may charge Applicant for inspection expenses only if the inspection reflects
that Applicant is in substantial noncompliance with the terms of this Agreement.
If the inspection reflects that Applicant's facilities are not in compliance
with the terms of this Agreement, Applicant shall bring its facilities into
compliance promptly after being notified of such noncompliance and shall notify
SWBT in writing when the facilities have been brought into compliance.

         16.02 Report of Inspection Results. SWBT will provide Applicant the
results of any inspection of Applicant's facilities performed under Section
16.01 of this Agreement.

         16.03 Post-installation Inspections. This article does not apply to
post-installation inspections performed as part of a pre-license survey in those
cases when Applicant has occupied space on or in SWBT's poles, ducts, conduits,
or rights-of-way prior to the issuance of a license pursuant to Section 8.03 of
this Agreement.




                                    PAGE 66


<PAGE>   363

                      ARTICLE 17: TAGGING OF FACILITIES AND
                            UNAUTHORIZED ATTACHMENTS

         17.01 Facilities to Be Marked. Applicant shall tag or otherwise mark
all of Applicant's facilities placed on or in SWBT's poles, ducts, conduits, and
rights-of-way in a manner sufficient to identify the facilities as Applicant's
facilities.

         17.02 Removal of Untagged Facilities. Subject to the provisions of
subsections (a)-(d) of this section, SWBT may, without notice to any person or
entity, remove from SWBT's poles or any part of SWBT's conduit system any
untagged or unmarked facilities, including any such facilities owned or used by
Applicant, if SWBT determines that such facilities are not the subject of a
current license authorizing their continued attachment to SWBT's poles or
occupancy of SWBT's conduit system and are not otherwise lawfully present on
SWBT's poles or in SWBT's conduit system.

                  (a)      Before removing any such untagged or unmarked
                           facilities, SWBT shall first attempt to determine
                           whether the facilities are being used by Applicant or
                           any other firm, are authorized by any license subject
                           to this Agreement, or are otherwise lawfully present
                           on SWBT's poles or in SWBT's conduit system.

                  (b)      SWBT shall not remove untagged or unmarked facilities
                           which are thought to be operational without first
                           making reasonable efforts to (1) determine the
                           identity of the owner or other person or entity
                           thought to be responsible for the facilities and (2)
                           give advance written notice to such person or entity.

                  (c)      If the facilities appear to be facilities of
                           Applicant described in a current license or
                           application subject to this Agreement, SWBT shall
                           give written notice to Applicant requesting Applicant
                           to tag or mark the facilities within 60 days and
                           Applicant shall either tag the facilities within the
                           60-day period, advise SWBT in writing of its schedule
                           for tagging the facilities, or notify SWBT in writing
                           that it disclaims ownership of or responsibility for
                           the facilities. If Applicant disclaims ownership of
                           or responsibility for the facilities, Applicant shall
                           disclose to SWBT the identity of the owner or other
                           person or entity, if any, thought by Applicant to be
                           responsible for the facilities.

                  (d)      If the facilities appear to be facilities used by
                           Applicant but not subject to a current license
                           granted under this Agreement, the provisions of
                           Sections 17.05-17.12 shall apply.

         17.03 Verification That Presently Attached Facilities Are Subject to
Existing Licenses. Applicant warrants and represents that, to the best of its
information and belief, all facilities presently owned or used by Applicant and
attached to SWBT's poles 



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<PAGE>   364


or occupying space within any part of SWBT's conduit system in this State have
been disclosed to SWBT and are subject to current licenses or are otherwise
lawfully present on or in SWBT's poles, ducts, and conduits. If Applicant
determines that any such facilities are not the subject of current licenses,
Applicant shall so advise SWBT and promptly apply for licenses for such
facilities or remove the facilities from SWBT's poles or conduits. Nothing
contained in this section shall be construed as requiring Applicant to make a
field audit of its existing facilities to confirm the licensing status of its
facilities as a prerequisite to entering into this Agreement.

         17.04 Updating of Plant Location Records. Applicant shall furnish SWBT,
upon request, with such information as may from time to time be necessary for
SWBT to correct and update SWBT's pole and conduit maps and records, cable plat
maps, and other plant location records recording or logging assignments of pole,
duct, and conduit space.

         17.05 Notice to Applicant. If any of Applicant's facilities for which
no license is presently in effect are found attached to SWBT's poles or anchors
or within any part of SWBT's conduit system, SWBT, without prejudice to other
rights or remedies available to SWBT under this Agreement, and without prejudice
to any rights or remedies which may exist independent of this Agreement, shall
send a written notice to Applicant advising Applicant that no license is
presently in effect with respect to the facilities and that Applicant must,
within 60 days, respond to the notice as provided in Section 17.06 of this
Agreement.

         17.06 Applicant's Response. Within 60 days after receiving a notice
under Section 17.05 of this Agreement, Applicant shall acknowledge receipt of
the notice and submit to SWBT, in writing, either:

                  (a)      a denial or disclaimer of ownership or other interest
                           in the facilities, together with an explanation of
                           the factual and claimed legal basis for such denial
                           or disclaimer;

                  (b)      a statement that the facilities are the subject of a
                           current license, together with an explanation of the
                           factual and claimed legal basis for Applicant's
                           assertion that the facilities are currently licensed,
                           or a statement that no license is required, and an
                           explanation of the factual and claimed legal basis
                           for that assertion; or

                  (c)      an application for a new or amended license with
                           respect to such facilities, together with a full and
                           complete explanation of the circumstances under which
                           such facilities were attached to, placed within, or
                           allowed to remain on or in SWBT's poles or any part
                           of SWBT's conduit system. Such explanation shall
                           include, at a minimum, the following:




                                    PAGE 68


<PAGE>   365




                           (1)      the date (or estimated date) when such
                                    facilities were attached to SWBT's poles or
                                    placed in SWBT's conduit system, and the
                                    factual basis supporting Applicant's
                                    selection of such date (or estimated date);
                                    and

                           (2)      the factual basis for Applicant's assertion,
                                    if any, that decisions to attach, place or
                                    allow the facilities to remain on or in
                                    SWBT's poles or conduit system were made in
                                    good faith and without intent to circumvent
                                    SWBT's pole attachment or conduit occupancy
                                    licensing requirements.

         17.07 Denial or Disclaimer of Ownership or Other Interest. Applicant's
submission to SWBT of a denial or disclaimer of ownership or other interest in
the facilities shall constitute Applicant's waiver of any objection Applicant
may have to SWBT's removal of the facilities. Submission of such a denial or
disclaimer shall not be construed as an agreement by Applicant to pay any
charges associated with removal of the facilities and shall be deemed to be a
denial of any such responsibility; provided, however, that nothing contained in
this section shall prohibit SWBT from invoking the dispute resolution process or
filing suit, in a court of competent jurisdiction, to establish that Applicant
is liable to SWBT for the costs of removal notwithstanding its denial or
disclaimer.

         17.08 Review by SWBT of Licensing Status. Within 15 business days after
receiving Applicant's statement that the facilities are the subject of a current
license or that no license is required, SWBT shall review Applicant's
explanation of the factual and claimed legal basis for Applicant's assertions
and shall advise Applicant, in writing, whether it agrees or disagrees with
Applicant's assertions. If SWBT agrees with Applicant's assertions, the parties
may amend the applicable license and no further action shall be required of
Applicant. If SWBT does not accept Applicant's position, Applicant shall, within
15 business days, apply for a new or amended license as provided by Section
17.06(c) of this Agreement.

         17.09 Approval of License and Retroactive Charges. If SWBT approves
Applicant's application for a new or amended license, Applicant shall be liable
to SWBT for all fees and charges associated with the unauthorized attachments as
specified in Section 17.10 of this Agreement. The issuance of a new or amended
license as provided by this article shall not operate retroactively or
constitute a waiver by SWBT of any of its rights or privileges under this
Agreement or otherwise.

         17.10 Fees and Charges. This section applies to fees and charges with
respect to Applicant's facilities placed on or in SWBT pole, duct, or conduit
space which has not been assigned to Applicant. Applicant shall be liable to
SWBT for all fees and charges associated with any such unauthorized pole
attachments or conduit occupancy for which it is responsible. Attachment and
occupancy fees and charges shall continue to accrue until the unauthorized
facilities are removed from SWBT's poles or conduit system and 



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<PAGE>   366

shall include, but not be limited to, all fees and charges which would have been
due and payable if Applicant and its predecessors had continuously complied with
all applicable SWBT licensing requirements. Such fees and charges shall be due
and payable 30 days after the date of the bill or invoice stating such fees and
charges. The parties shall engage in good faith discussions to reach a mutually
agreed determination as to the amount due and owing. In some cases, it may be
impractical, unduly difficult, or uneconomical to determine the actual amount of
fees which would have been due and payable if all licensing requirements had
been met. Therefore, if the parties, through good faith discussions fail to
reach agreement on the amount due and owing, and if the amount due and owing
cannot be determined due to Applicant's inability to provide the information
required to determine the correct amount, the amount owing with respect to each
unauthorized attachment or occupancy shall be equal to three times the annual
attachment and occupancy fees in effect on the date Applicant is notified by
SWBT of the unauthorized attachment or occupancy. Payment of such fees shall be
deemed liquidated damages and not a penalty. In addition, Applicant shall
rearrange or remove its unauthorized facilities at SWBT's request to comply with
applicable placement standards, shall remove its facilities from any space
occupied by or assigned to SWBT or another joint user, and shall pay SWBT for
all costs incurred by SWBT in connection with any facilities rearrangements,
modifications, or replacements necessitated as a result of the presence of
Applicant's unauthorized facilities.

         17.11 Removal of Unauthorized Attachments. If Applicant does not apply
for a new or amended pole attachment license with respect to unauthorized
facilities within the specified period of time, or if such application is
received and specifically disapproved, SWBT shall by written notice request to
Applicant to remove its unauthorized facilities not less than 60 days from the
date of notice and Applicant shall remove the facilities within the time
specified in the notice; provided, however, that SWBT may request Applicant to
remove such facilities at an earlier date if such earlier removal is necessary
for reasons beyond SWBT's control. If the facilities have not been removed
within the time specified in the notice, SWBT may, at SWBT's option, remove
Applicant's facilities at Applicant's expense.

         17.12 No Ratification of Unlicensed Attachments or Unauthorized Use of
SWBT's Facilities. No act or failure to act by SWBT with regard to any
unlicensed attachment or occupancy or unauthorized use of SWBT's facilities
shall be deemed to constitute a ratification by SWBT of the unlicensed
attachment or occupancy or unauthorized use, nor shall the payment by Applicant
of fees and charges for unauthorized pole attachments or conduit occupancy
exonerate Applicant from civil or criminal liability for any deliberate trespass
or other illegal or wrongful conduct in connection with the placement or use of
such unauthorized facilities.

                  ARTICLE 18: REMOVAL OF APPLICANT'S FACILITIES

         18.01 Responsibility for Removing Facilities. Applicant shall be
responsible for and shall bear all expenses arising out of or in connection with
the removal of its 


                                    PAGE 70


<PAGE>   367



facilities from SWBT's poles, ducts, conduits, and rights-of-way. Such removals
shall be performed in accordance with the provisions of this article.

                  (a)      When practicable, Applicant shall give SWBT at least
                           30 days' advance notice in writing of its intent to
                           remove facilities from any part of SWBT's conduit
                           system and the proposed method of removal. The notice
                           shall include the locations of the facilities to be
                           removed, the name and telephone number of the manager
                           responsible for removal of the facilities, and the
                           estimated dates when removal of the facilities will
                           begin and end.

                  (b)      Applicant shall, if requested by SWBT to do so, place
                           a pull mandrel (slug) through all or any specified
                           part of the duct which was occupied by Applicant.

                  (c)      Except as otherwise agreed upon in writing by the
                           parties, Applicant must, after removing its
                           facilities, plug all previously occupied ducts at the
                           entrances to SWBT's manholes (if SWBT would itself
                           plug the ducts under the same circumstances) in
                           accordance with the standards set by SWBT for its own
                           operations, provided that such standards have been
                           communicated in writing to Applicant at least 60 days
                           in advance of the removal of Applicant's facilities.

                  (d)      Applicant shall be solely responsible for the removal
                           of its own facilities from SWBT's poles, ducts,
                           conduits, and rights-of-way and for (1) paying all
                           persons and entities which provide materials, labor,
                           access to real or personal property, or other goods
                           or services in connection with the removal of
                           Applicant's facilities from SWBT's poles, ducts,
                           conduits, or rights-of-way and (2) directing the
                           activities of all such personnel while they are
                           physically present on, within, or in the vicinity of
                           SWBT's poles, ducts, conduits, or rights-of-way.

                  (e)      When Applicant no longer intends to occupy space on a
                           SWBT pole or in a SWBT duct or conduit, Applicant
                           will provide written notification to SWBT that it
                           wishes to terminate the license with respect to such
                           space and will remove its facilities from the space
                           described in the notice. Upon removal of Applicant's
                           facilities, the license shall terminate and the space
                           shall be available for reassignment.

         18.02 Removal of Facilities Not in Active Use. At SWBT's request,
Applicant shall remove from SWBT's poles, ducts, conduits, and rights-of-way any
of Applicant's facilities which are no longer in active use; provided, however,
that Applicant shall not be required to remove such facilities when due cause
and justification exists for allowing them to remain in place. Applicant shall
not be required to remove retired or inactive (dead) cables that have been
overlashed by other facilities which remain in active use 


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<PAGE>   368


unless removal expenses are paid by the person or entity requesting removal of
such facilities. Applicant shall not be required to remove cables that would
require excavation to remove unless the person or entity requesting removal of
such cables bears the expenses of such excavation in a manner analogous to the
provisions of Section 10.02(c) of this Agreement. Applicant shall not abandon
any of its facilities by leaving them on SWBT's poles, in SWBT's ducts,
conduits, or rights-of-way, at any location where they may block or obstruct
access to SWBT's poles or any part of SWBT's conduit system, or on any public or
private property (other than property owned or controlled by Applicant) in the
vicinity of SWBT's poles, ducts, conduits, or rights-of-way.

         18.03 Removal Following Termination of License. Applicant shall remove
its facilities from SWBT's poles, ducts, conduits, or rights-of-way within 60
days, or within such other period of time as shall be mutually agreeable to the
parties, after termination of the license authorizing the attachment of such
facilities to SWBT's poles or the placement of such facilities in SWBT's ducts,
conduits, or rights-of-way.

         18.04 Removal Following Replacement of Facilities. Applicant shall
remove facilities no longer in service from SWBT's poles or conduit system
within 60 days, or within such other period of time as shall be mutually
agreeable to the parties, after the date Applicant replaces existing facilities
on a pole or in a conduit with substitute facilities on the same pole or in the
same conduit; provided, however, that removal of facilities from the maintenance
duct shall be governed by Sections 12.04, 13.03, and 15.02 of this Agreement and
not by this section.

         18.05 Removal to Avoid Forfeiture. If the presence of Applicant's
facilities on SWBT's poles or in SWBT's ducts, conduits, or rights-of-way would
cause a forfeiture of the rights of SWBT to occupy the property where such pole,
duct, conduit, or right-of-way is located, SWBT will promptly notify Applicant
in writing and Applicant shall not, without due cause and justification, refuse
to remove its facilities within such time as may be required to prevent such
forfeiture. SWBT will give Applicant not less than 60 days from the date of
notice to remove Applicant's facilities unless prior removal is required to
prevent the forfeiture of SWBT's rights. At Applicant's request, the parties
will engage in good faith negotiations with each other, with joint users, and
with third-party property owners and cooperatively take such other steps as may
be necessary to avoid the unnecessary removal of Applicant's facilities in the
face of a threatened forfeiture.

         18.06 Notice of Completion of Removal Activities. Applicant shall give
written notice to SWBT stating the date on which the removal of its facilities
from SWBT's poles, ducts, conduits, and rights-of-way has been completed.
Charges shall continue to accrue with respect to such facilities until
Applicant's facilities have been removed, pull mandrels (slugs) have been pulled
if required by Section 18.01(b) of this Agreement, Applicant has plugged all
previously occupied ducts at the entrances to SWBT's manholes as required by
Section 18.01(c) of this Agreement, and the notice required by this section has
been given.


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         18.07 Removal of Facilities by SWBT; Notice of Intent to Remove. If
Applicant fails to remove its facilities from SWBT's poles, ducts, or conduits
in accordance with the provisions of Sections 18.01-18.06 of this Agreement,
SWBT may remove such facilities and store them at Applicant's expense in a
public warehouse or elsewhere without being deemed guilty of trespass or
conversion and without becoming liable to Applicant for any injury, loss, or
damage resulting from such actions. SWBT shall give Applicant not less than 60
days prior written notice of its intent to remove Applicant's facilities
pursuant to this section. The notice shall state:

                  (a)      the date when SWBT plans to commence removal of
                           Applicant's facilities, and that Applicant may remove
                           the facilities at Applicant's sole cost and expense
                           at any time before the date specified;

                  (b)      SWBT's plans with respect to disposition of the
                           facilities removed; and

                  (c)      that Applicant's failure to remove the facilities or
                           make alternative arrangements with SWBT for removal
                           and disposition of the facilities shall constitute an
                           abandonment of the facilities and of any interest
                           therein.

         18.08 Removal of Facilities by SWBT. If SWBT removes any of Applicant's
facilities pursuant to this article, Applicant shall reimburse SWBT for SWBT's
costs in connection with the removal, storage, delivery, or other disposition of
the removed facilities.

         18.09 Reattachment or Subsequent Attachment Following Removal. After
Applicant's facilities have been properly removed pursuant to the provisions of
this article, neither the removed facilities nor replacement facilities shall be
attached to SWBT's poles or placed in SWBT's conduit system until Applicant has
first submitted new applications for the facilities and complied with the
provisions of this Agreement.

                  ARTICLE 19: RATES, FEES, CHARGES, AND BILLING

         19.01 Rates, Charges and Fees Subject to Applicable Laws, Regulations,
Rules, and Commission Orders. All rates, charges and fees set forth in this
Agreement, including rates, charges and fees set forth in APPENDIX I (Schedule
of Rates, Fees, and Charges), shall be subject to all applicable federal and
state laws, rules, regulations, and commission orders, including but not limited
to (a) the Pole Attachment Act and rules, regulations, and commission orders
issued thereunder and (b) applicable orders of the State Commission in
interconnection arbitration proceedings.

         19.02 Schedule of Rates, Fees, and Charges. SWBT's current schedule of
rates, fees, and charges is attached to this Agreement as APPENDIX I and
incorporated herein as an integral part of this Agreement.


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         19.03 Pole Attachment and Conduit Occupancy Fees. Until such time as
the FCC authorizes the charging of different rates to cable television systems
and telecommunications carriers, SWBT's annual rates for access to poles, ducts,
conduits, and rights-of-way shall be the same for cable television systems and
telecommunications carriers. For all attachments to SWBT's poles and occupancy
of SWBT's ducts and conduits, Applicant will pay SWBT's semiannual pole
attachment and conduit occupancy fees as specified in APPENDIX I. Pole
attachment and conduit occupancy fees shall be assessed and billed with respect
to (a) occupied space whether or not subject to a current license and (b)
assigned space as well as occupied space. Fees for pole attachments shall be
based on the number of Applicant's pole attachments as of the date of billing by
SWBT and shall be calculated in accordance with applicable FCC rules,
regulations, and orders. Fees for conduit occupancy shall be based on the number
of duct feet occupied by or assigned to Applicant as of the date of billing by
SWBT and shall be calculated in accordance with applicable FCC rules,
regulations, and orders.

         19.04 Billing for and Payment of Pole Attachment and Conduit Occupancy
Fees. Pole Attachment and conduit occupancy fees under this Agreement and
licenses subject to this Agreement shall be payable semiannually in advance.

                  (a)      Bills shall be submitted to Applicant for two
                           semiannual billing periods, the first period
                           including charges for the months of January through
                           June and the second including charges for the months
                           of July through December.

                  (b)      Charges associated with newly licensed pole
                           attachments and conduit occupancy shall be prorated
                           on a daily basis and billed with the next semiannual
                           bill.

                  (c)      Charges shall be adjusted and retroactively prorated
                           on a daily basis following the removal of Applicant's
                           facilities and shall be retroactively adjusted as a
                           credit on the next semiannual bill.

         19.05 Application Fees. SWBT does not currently charge application fees
in connection with requests for access to poles, ducts, conduits, and
rights-of-way. SWBT does, however, impose charges, on a case-by case basis, for
work performed in processing applications for access and preparing SWBT's poles,
ducts, conduits, and rights-of-way to accommodate the facilities of parties
seeking access.

         19.06 Charges for Pre-license Survey Work. Subject to applicable
commission orders, Applicant will pay SWBT's charges for pre-license survey work
associated with the processing of Applicant's request for access. SWBT's
pre-license survey charges are not set on a fixed fee basis and will vary from
case-to-case depending on such factors as the number and location of the poles,
ducts, conduits, and rights-of-way subject to Applicant's access request, the
completeness and quality of information submitted by the 



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Applicant in its application, the nature of the facilities to be placed by
Applicant, and the nature and extent of facilities modification, capacity
expansion, and make-ready work proposed by Applicant.

         19.07 Charges for Facilities Modifications, Capacity Expansions, and
Make-ready Work. Subject to applicable commission orders, Applicant will pay
SWBT's charges for facilities modification, capacity expansion, and make-ready
work performed by SWBT, or by persons acting on SWBT's behalf, as provided in
other provisions of this Agreement and APPENDIX I.

         19.08 Contract Administration Fee. Subject to applicable commission
orders, SWBT may charge Applicant a one-time contract administration as provided
in APPENDIX I. This fee, if applicable, shall be assessed for work performed in
the initial processing of this Agreement and shall be non-refundable upon
acceptance of this Agreement by SWBT.

         19.09 Administrative Record-keeping Fees. Subject to applicable
commission orders, SWBT may charge Applicant cost-based administrative
record-keeping fees (e.g., fees associated with records and billing changes
resulting from the sale, consolidation, or other transfer of Applicant's
business or facilities, name changes, and the like) as provided in APPENDIX I.

         19.10 Charges for Work Performed by SWBT Employees. Except as otherwise
specifically required by applicable commission orders, SWBT's charges to
Applicant for worked performed by SWBT employees pursuant to this Agreement
shall be computed by multiplying the fully loaded hourly rates for such
employees times the number of hours required to perform the work. Disputes over
SWBT's charges for work performed by SWBT employees, including disputes between
the parties concerning the number of hours required to perform the work, shall
be subject to the dispute resolution procedures of Article 30. Notwithstanding
the execution of this Agreement, Applicant shall have the right to challenge the
methodology utilized by SWBT to determine hourly rates for SWBT employees at any
time in any forum having jurisdiction over the subject matter.

         19.11 Due Date for Payment, Interest on Past Due Invoices, Remedies for
Nonpayment, and Procedures for Disputing Charges. For fees and charges other
than charges for make-ready work, each bill or invoice submitted by SWBT to
Applicant shall state the date that payment is due, which date shall be not less
than 60 days after the date of the bill or invoice. Applicant will pay each such
bill or invoice on or before the stated due date. For make-ready work, the
payment due date shall be not less than 30 days after the date of the bill or
invoice.

                  (a)      Interest on past due bills and invoices shall accrue
                           at the rate of 12% per annum, or the maximum rate
                           allowed by law, whichever is less.




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                  (b)      Applicant's failure to pay SWBT's fees and charges
                           shall be grounds for terminating this Agreement and
                           licenses subject to this Agreement.

                  (c)      If Applicant fails to pay, when due, any fees or
                           charges billed to Applicant under this Agreement, and
                           any portion of such fees or charges remains unpaid
                           more that 15 calendar days after the due date, SWBT
                           may send Applicant a written notice advising
                           Applicant that this Agreement, or specified licenses
                           subject to this Agreement, may be terminated if such
                           fees or charges are not paid within 15 calendar days
                           after the date of the notice. Applicant must remit to
                           SWBT all such unpaid fees or charges, whether
                           disputed or undisputed, within 15 days after the date
                           of the notice. If Applicant pays disputed fees under
                           protest, and it is later determined that such fees or
                           any portion thereof should be refunded, the portion
                           of fees to be refunded shall be refunded with
                           interest at the rate of 12% per annum or the maximum
                           rate allowed by law, whichever is less.

                  (d)      Applicant may dispute any fees or charges billed by
                           SWBT to Applicant under this Agreement by invoking
                           the dispute resolution procedures set forth in
                           Article 30 of this Agreement.

                  (e)      If Applicant does not dispute such fees or charges
                           and any portion of such undisputed fees or charges
                           remains unpaid 30 calendar days after the date of the
                           notice, SWBT may, to the extent permitted by the Pole
                           Attachment Act and applicable rules, regulations, and
                           commission orders, terminate this Agreement and
                           licenses subject to this Agreement, suspend the
                           processing of pending applications for access to
                           SWBT's poles, ducts, conduits, and rights-of-way
                           located in this State, and refuse to accept further
                           applications for access until such undisputed fees or
                           charges, together with accrued interest thereon, have
                           been paid in full.

         19.12 Modification of Rates, Fees and Charges. Subject to applicable
federal and state laws, rules, regulations, and commission orders, SWBT shall
have the right to modify all rates, charges and fees set forth in this
Agreement, including but not limited to those listed in APPENDIX I, as provided
in this section.

                  (a)      Upon written notice to Applicant, SWBT may change, on
                           a going-forward basis, the amounts of any rates, fees
                           or charges assessed under this Agreement. Pole
                           attachment and conduit occupancy rates shall not be
                           increased more than once annually.

                           (1)      The notice shall state the effective date of
                                    the changes, which, in the event of a rate
                                    increase, shall be no earlier than the 60th
                                    day after the notice is given.



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                           (2)      The changes shall be effective on the
                                    effective date stated in the notice unless
                                    stayed or prohibited by a court or agency of
                                    competent jurisdiction.

                           (3)      The changes shall be reflected on the first
                                    semiannual bill issued on or after the
                                    effective date specified in the notice.

                  (b)      If the rates, fees and charges set forth in the
                           notice are not acceptable to Applicant, Applicant
                           may, notwithstanding any other provisions of this
                           Agreement, at Applicant's option (1) seek the
                           renegotiation of this Agreement, (2) terminate this
                           Agreement, or (3) seek relief through the dispute
                           resolution process or before a court or agency of
                           competent jurisdiction.

         19.13 Disputes Over Charging Methodologies. The parties acknowledge
that the Pole Attachment Act grants the FCC regulatory authority over the rates,
terms, and conditions of access to poles, ducts, conduits, and rights-of-way.
The parties further acknowledge that, as of the date of this Agreement, this
State has not elected to assume reverse preemptive regulatory authority over
such rates, terms, and conditions by certifying to the FCC that it has made such
election. Accordingly, complaints concerning and challenges to SWBT's charging
methodologies shall be brought, in the first instance, before the FCC in
accordance with FCC procedural rules unless this State elects to preempt FCC
regulation of pole attachment rates, terms, and conditions of access; provided,
however, that nothing contained in this section shall be construed as affecting
the right of either party to seek relief from any court or agency of competent
jurisdiction in connection with the negotiation, arbitration, and approval of
interconnection agreements under 47 U.S.C. ss. 252.

                    ARTICLE 20: PERFORMANCE AND PAYMENT BONDS

         20.01 Bond May Be Required. SWBT may require Applicant, authorized
contractors, and other persons acting on Applicant's behalf to execute
performance and payment bonds (or provide other forms of security) in amounts
and on terms sufficient to guarantee the performance of their respective
obligations arising out of or in connection with this Agreement only as provided
in subsections (a)-(b) of this section and Section 20.02. Bonds shall not be
required for entities meeting all self-insurance requirements of Section 23.02
of this Agreement.

                  (a)      If Applicant elects to perform make-ready or
                           facilities modification work under Section 6.08(c) or
                           Sections 10.02-10.05 of this Agreement, SWBT may
                           require Applicant, authorized contractors, and other
                           persons acting on Applicant's behalf to execute bonds
                           equivalent to those which would be required by SWBT
                           if the work had been performed by contractors,
                           subcontractors, or other persons selected directly by
                           SWBT. No bonds shall be required of Applicant,
                           authorized contractors, or other 


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                           persons acting on Applicant's behalf except in those
                           situations where a bond would be required if the work
                           were being performed on SWBT's behalf.

                  (b)      No other bond shall be required of Applicant to
                           secure obligations arising under this Agreement in
                           the absence of due cause and justification.

                  (c)      If a bond or similar form of assurance is required of
                           Applicant, an authorized contractor, or other person
                           acting on Applicant's behalf, Applicant shall
                           promptly submit to SWBT, upon request, adequate proof
                           that the bond remains in full force and effect and
                           provide certification from the company issuing the
                           bond that the bond will not be cancelled, changed or
                           materially altered without first providing SWBT 60
                           days written notice.

                  (d)      SWBT may communicate directly with the issuer of any
                           bond required by SWBT pursuant to this section to
                           verify the terms of the bond, to confirm that the
                           bond remains in force, and to make demand on the
                           issuer for payment or performance of any obligations
                           secured by the bond.

         20.02 Payment and Performance Bonds in Favor of Contractors and
Subcontractors. Applicant shall be responsible for paying all employees,
contractors, subcontractors, mechanics, materialmen and other persons or
entities performing work or providing materials in connection with (a) the
performance of facilities modification, capacity expansion, or make-ready work
by Applicant, authorized contractors, or other persons acting on Applicant's
behalf under Sections 6.08(c) and 10.02-10.05 of this Agreement or (b) the
construction, attachment, use, inspection, maintenance, repair, rearrangement,
modification, and removal of any of Applicant's facilities attached or to be
attached to SWBT's poles or placed or to be placed within SWBT's ducts,
conduits, or rights-of-way. In the event any claim or demand is made on SWBT by
any such employee, contractor, subcontractor, mechanic, materialman, or other
person or entity providing such materials or performing such work, SWBT may
require, in addition to any security provided under Section 20.01 of this
Agreement, that Applicant execute payment or performance bonds, or provide such
other security, as SWBT may deem reasonable or necessary to protect SWBT from
any such claim or demand.

                           ARTICLE 21: INDEMNIFICATION

         21.01 Risks Associated with Outside Plant Operations. The parties
acknowledge that SWBT's outside plant facilities include thousands of miles of
pole lines, conduits, and rights-of-way located on public and private property
throughout SWBT's service area, that SWBT cannot control or continuously monitor
activities that occur at these sites, and that the risks associated with outside
plant operations and facilities are not 




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similar to the risks associated with operations occurring inside SWBT's central
offices and other secure SWBT buildings and structures. The parties further
acknowledge that the presence of multiple firms on or in poles, ducts, conduits,
and rights-of-way owned or controlled by SWBT requires that liability risks be
fairly allocated between the parties and that it is the parties' intent to
allocate such risks in a just, reasonable, and nondiscriminatory manner which
addresses known risks associated with the outside plant environment and
activities and conditions at outside plant locations.

         21.02 Control of Premises. Applicant acknowledges that its employees
and other persons acting on Applicant's behalf, and employees of joint users and
other persons acting on behalf of joint users, will be present, without
supervision or control by SWBT, and in many cases without SWBT's knowledge, on,
within, and in the vicinity of SWBT's poles, ducts, conduits, and rights-of-way.
During those times when Applicant's employees and personnel are present at such
sites, Applicant shall be deemed, for the purpose of allocating liabilities
between the parties, to be an independent contractor in control of the premises
except as otherwise provided in this section. Although SWBT inspectors may be
present at the site of work being performed by Applicant or persons acting on
Applicant's behalf, such inspectors shall have no authority to direct Applicant
or personnel acting on Applicant's behalf concerning the method or manner by
which the work is to be performed, and the presence of a SWBT inspector shall
not result in SWBT's being deemed to be in control of the premises. When both
parties are present and performing work operations at a site subject to this
section, SWBT and Applicant shall be deemed to be jointly in control of the
premises. When poles, ducts, conduits, or rights-of-way occupy property owned by
third parties, neither party shall be deemed to be in control of the premises,
except as otherwise provided by law, at times when such party's work operations
are not in progress. Work operations shall be considered to be in progress from
the time work commences until such work is completed whether or not employees of
a party or persons acting on such party's behalf are actually present at the
site.

         21.03 INDEMNITY AGAINST AND LIMITATIONS OF LIABILITY WITH RESPECT TO
CERTAIN NEGLIGENT ACTS AND OMISSIONS. THIS ARTICLE INCLUDES PROVISIONS
INDEMNIFYING EACH PARTY FROM LIABILITIES ARISING OUT OF OR IN CONNECTION WITH
CERTAIN NEGLIGENT ACTS AND OMISSIONS OF SUCH PARTY. THIS ARTICLE ALSO INCLUDES
PROVISIONS LIMITING THE LIABILITIES OF EACH PARTY ARISING OUT OF OR IN
CONNECTION WITH CERTAIN NEGLIGENT ACTS AND OMISSIONS OF SUCH PARTY.

         21.04 Indemnities Excluded. Except as otherwise specifically provided
in this article, neither party (as an "indemnifying party") shall be required to
indemnify or defend the other party (as an "indemnified party") against, or hold
the indemnified party harmless from, any suit, claim, demand, loss, damage,
liability, fine, penalty, or expense arising out of:



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                  (a)      any breach by the indemnified party of any provision
                           of this Agreement or any breach by the indemnified
                           party of the parties' interconnection agreement, if
                           any;

                  (b)      the violation of any law by any employee of the
                           indemnified party or other person acting on the
                           indemnified party's behalf;

                  (c)      willful or intentional misconduct or gross negligence
                           committed by any employee of the indemnified party or
                           by any other person acting on the indemnified party's
                           behalf; or

                  (d)      any negligent act or acts committed by any employee
                           of the indemnified party or other person acting on
                           the indemnified party's behalf, if such negligent act
                           or acts are the sole producing cause of the injury,
                           loss, or damage giving rise to the suit, claim,
                           demand, loss, damage, liability, fine, penalty, or
                           expense for which indemnity is requested.

         21.05 Workplace Injuries. The parties acknowledge that injuries may
occur at sites where work is being performed by or for either party and that
primary responsibility for preventing workplace injuries shall be placed on the
party controlling work operations at the site. Workplace injuries may result
from any of variety of causes, including but not limited to electrocution
associated with contact with electric power lines on poles or use of defective
equipment, falls from poles resulting from the negligence of the injured person
or co-workers or due to the existence of unsafe conditions on or in the vicinity
of the pole, cave-ins and other accidents at excavation sites, explosion of
combustible gases within or in the vicinity of a conduit system, exposure to
hazardous substances or noxious gases at the site, acts of God, and acts and
omissions of third parties over whom neither party has control. Except as
expressly provided in this Agreement to the contrary, each party shall
indemnify, on request defend, and hold the other party harmless from any and all
suits, claims, demands, losses, damages, liabilities, fines, penalties, or
expenses of every kind and character, on account of or in connection with any
injury, loss, or damage suffered by any person, which arises out of or in
connection with the personal injury or death of any employee of the indemnifying
party (or other person acting on the indemnifying party's behalf) if such injury
or death results, in whole or in part, from any occurrence or condition on,
within, or in the vicinity of SWBT's poles, ducts, conduits, and rights-of-way;
provided, however, that Applicant's indemnification duties under this section
shall arise only if the person injured is present at such site in connection
with the performance or anticipated performance of any act required or permitted
to be performed by Applicant or by persons acting on Applicant's behalf pursuant
to this Agreement. Indemnities provided by this section shall be subject to the
exclusions set forth in Section 21.04 and include but are not limited to
indemnities arising out of or in connection with claims arising from or in any
way connected with any injury, sickness, disease, or death of any employee of
the indemnifying party or any person acting on the indemnifying party's behalf
attributable or allegedly attributable to occurrences or conditions on, within,
or in the vicinity of 



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SWBT's poles, ducts, conduits, and rights-of-way. EXCEPT AS PROVIDED ABOVE IN
SUBSECTIONS 21.04(c)-(d), THE INDEMNIFYING PARTY'S INDEMNIFICATION OBLIGATIONS
UNDER THIS SECTION SHALL ARISE EVEN IF THE INJURY, SICKNESS, DISEASE, OR DEATH
WAS ATTRIBUTABLE IN PART TO NEGLIGENT ACTS OR OMISSIONS OF THE INDEMNIFIED
PARTY.

         21.06 Other Claims Brought Against Either Party by Employees and Other
Persons Acting on the Other Party's Behalf. Nothing contained in this Agreement
shall create any contractual liability or other liability on the part of either
party to any employee, contractor, or subcontractor of the other party or any
other person acting on the other party's behalf. Each party shall indemnify, on
request defend, and hold the other party harmless from any and all suits,
claims, demands, losses, damages, liabilities, or expenses of every kind and
character (other than workplace injury claims subject to Section 21.05 above)
made, brought, or sought against the indemnified party by any employee,
contractor, or subcontractor of the indemnifying party or by any other person
acting on the indemnifying party's behalf; provided, however, that this section
shall apply only to suits, claims, demands, losses, damages, liabilities, or
expenses related to the subject matter of this Agreement. Indemnities provided
by this section shall be subject to the exclusions set forth in Section 21.04
and include but are not limited to indemnities arising out of or in connection
with claims arising from or in any way connected with the employment
relationship or other claimed relationship between the indemnifying party and
the employee, contractor, subcontractor, or other person acting on the
indemnifying party's behalf; claims arising out of disputes over payments due or
allegedly due to any employee, contractor, subcontractor, or other person acting
on the indemnifying party's behalf; and claims arising out of other contract
disputes between the indemnifying party and the employee, contractor,
subcontractor, or other person acting on the indemnifying party's behalf. EXCEPT
AS PROVIDED ABOVE IN SUBSECTIONS 21.04(c)-(d), THE INDEMNIFYING PARTY'S
INDEMNIFICATION OBLIGATIONS UNDER THIS SECTION SHALL ARISE EVEN IF THE INJURY,
LOSS, OR DAMAGE GIVING RISE TO THE INDEMNIFICATION CLAIM WAS ATTRIBUTABLE IN
PART TO NEGLIGENT ACTS OR OMISSIONS OF THE INDEMNIFIED PARTY.

         21.07 Claims Brought Against Either Party by Vendors, Suppliers,
Customers, and other Persons in Privity of Contract with the Other Party. The
parties acknowledge that neither party controls the contractual relationships
between the other party and vendors, suppliers, customers, and other persons in
privity of contract with the other party and that nothing contained in this
Agreement shall create any contractual or other liability of either party to any
vendor, supplier, customer, or other person or entity in privity of contract
with the other party. Each party shall indemnify, on request defend, and hold
the other party harmless from any and all suits, claims, demands, losses,
damages, liabilities, or expenses of every kind and character, made, brought, or
sought against the indemnified party by any vendor, supplier, or customer of the
indemnifying party or by any other person or entity in privity with the
indemnifying party; provided, however, that this section shall apply only to
suits, claims, demands, losses, damages, 



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liabilities, or expenses related to the subject matter of this Agreement or
Applicant's use of SWBT's poles, ducts, conduits, or rights-of-way. The
indemnifying party may not, as a defense to any obligations of the indemnifying
party under this section, assert that the indemnified party's claims against the
indemnifying party are barred by any tariff or contract limitation of liability
applicable to the indemnifying party's vendor, supplier, or customer or to such
other person in privity of contract with the indemnifying party. Indemnities
provided by this section shall be subject to the exclusions set forth in Section
21.04 and include but are not limited to indemnities for claims against either
party arising out of or in connection with the failure by the other party to
meet its obligations (including but not limited to contract and tariff
obligations) to such other party's customers and suppliers. EXCEPT AS PROVIDED
ABOVE IN SUBSECTIONS 21.04(c)-(d), THE INDEMNIFYING PARTY'S INDEMNIFICATION
OBLIGATIONS UNDER THIS SECTION SHALL ARISE EVEN IF THE INJURY, LOSS, OR DAMAGE
GIVING RISE TO THE INDEMNIFICATION CLAIM WAS ATTRIBUTABLE IN PART TO NEGLIGENT
ACTS OR OMISSIONS OF THE INDEMNIFIED PARTY.

         21.08 Claims Brought Against Either Party by Such Party's Own
Employees, Contractors, Subcontractors, or Other Persons Acting on Such Party's
Behalf, and Claims Brought Against Either Party by Such Party's Own Vendors,
Suppliers, Customers, or Other Persons in Privity of Contract with Such Party.
Neither party shall be entitled to indemnity, contribution, or subrogation from
or by the other party with respect to any suits, claims, demands, losses,
damages, liabilities, or expenses, of any kind or character, made, brought, or
sought against such party by any employee, contractor, or subcontractor of such
party, by any other person acting on behalf of such party, by any vendor,
supplier, or customer of such party, or by any other person or entity in privity
of contract with such party, if such suit, claim, demand, loss, damage,
liability, or expense arises directly out of or in connection with the subject
matter of this Agreement or the use by Applicant of SWBT's poles, ducts,
conduits, or rights-of-way. Indemnities excluded by this section include, but
are not limited to, indemnities for claims against either party arising out of
or in connection with employment-related disputes between either party and its
employees; claims against either party by contractors, subcontractors, and
suppliers performing work or supplying materials to SWBT sites at the request of
such party; and other failures by either party to meet its obligations
(including but not limited to contract and tariff obligations) to such party's
own customers and suppliers. THE INDEMNIFICATION EXCLUSIONS OF THIS SECTION
SHALL APPLY EVEN IF THE INJURY, LOSS, OR DAMAGE GIVING RISE TO THE
INDEMNIFICATION CLAIM WAS ATTRIBUTABLE IN PART TO THE NEGLIGENT ACTS OR
OMISSIONS OF THE INDEMNIFYING PARTY BUT SHALL NOT APPLY IF THE INJURY, LOSS, OR
DAMAGE GIVING RISE TO THE INDEMNIFICATION CLAIM AROSE FROM WILLFUL OR
INTENTIONAL MISCONDUCT OR GROSS NEGLIGENCE COMMITTED BY ANY EMPLOYEE OF THE
INDEMNIFYING PARTY OR ANY OTHER PERSON ACTING ON THE INDEMNIFYING PARTY'S BEHALF
OR AROSE FROM ANY NEGLIGENT ACT OR ACTS COMMITTED BY ANY EMPLOYEE OF THE
INDEMNIFYING PARTY 



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OR OTHER PERSON ACTING ON THE INDEMNIFYING PARTY'S BEHALF, IF SUCH NEGLIGENT ACT
OR ACTS ARE THE SOLE PRODUCING CAUSE OF THE INJURY, LOSS, OR DAMAGE GIVING RISE
TO THE SUIT, CLAIM, DEMAND, LOSS, DAMAGE, LIABILITY, FINE, PENALTY, OR EXPENSE
FOR WHICH INDEMNITY IS REQUESTED.

         21.09 Injuries to Third Parties and Third-party Property Owners
Resulting from the Parties' Conduct. Each party shall indemnify, on request
defend, and hold the other party harmless from any and all suits, claims,
demands, losses, damages, liabilities, fines, penalties, or expenses, of every
kind and character, on account of or in connection with the personal injury or
death of any third party or physical damage to real or personal property owned
by a third party, arising, in whole or in part, out of or in connection with the
conduct of employees of the indemnifying party or other persons acting on the
indemnifying party's behalf while such employees or other persons are present
on, within, or in the vicinity of any SWBT pole, duct, conduit, or right-of-way
in connection with the performance or anticipated performance of any act
required or authorized to be performed pursuant to this Agreement. Indemnities
provided by this section shall be subject to the exclusions set forth in Section
21.04 and include but are not limited to indemnities arising out of or in
connection with personal injury, death, and property damage claims by third
parties based on willful or intentional misconduct and negligent acts and
omissions of the indemnifying party.

         21.10 Indemnification for Environmental Claims. The parties acknowledge
that hazardous substances may be present on, within, or in the vicinity of
SWBT's poles, ducts, conduits, or rights-of-way; that employees and other
persons acting on the parties' behalf working on, within, or in the vicinity of
SWBT's poles, ducts, conduits, or rights-of-way should be familiar with
environmental laws and environmental concerns which arise in outside plant
contexts; that all such employees and other persons should be prepared to
recognize and deal with environmental contingencies existing at specific sites;
and that liabilities associated with environmental claims arising out of or in
connection with the subject matter of this Agreement shall be allocated between
the parties as set forth in this section.

                  (a)      Each party shall indemnify, on request defend, and
                           hold the other party harmless from any and all suits,
                           claims, demands, losses, damages, liabilities, fines,
                           penalties, or expenses, of every kind and character,
                           on account of or in connection with any injury, loss,
                           or damage to any person or property, or to the
                           environment, arising out of or in connection with the
                           violation or breach, by any employee of the
                           indemnifying party or other person acting on the
                           indemnifying party's behalf, of (1) any federal,
                           state, or local environmental statute, rule,
                           regulation, ordinance, or other law or (2) any
                           provision or requirement of this Agreement dealing
                           with hazardous substances or protection of the
                           environment.



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                  (b)      Each party shall indemnify, on request defend, and
                           hold the other party harmless from any and all suits,
                           claims, demands, losses, damages, liabilities, fines,
                           penalties, or expenses, of every kind and character,
                           on account of or in connection with any injury, loss,
                           or damage to any person or property, or to the
                           environment, arising out of or in connection with the
                           release or discharge, onto any public or private
                           property, of any hazardous substances, regardless of
                           the source of such hazardous substances, by any
                           employee of the indemnifying party, or by any person
                           acting on the indemnifying party's behalf, while
                           present on, within, or in the vicinity of any SWBT
                           pole, duct, conduit, or right-of-way. Indemnities
                           provided by this subsection include but are not
                           limited to indemnities arising out of or in
                           connection with the release or discharge of water and
                           other substances from SWBT's manholes or other
                           conduit facilities.

                  (c)      Each party shall indemnify, on request defend, and
                           hold the other party harmless from any and all suits,
                           claims, demands, losses, damages, liabilities, fines,
                           penalties, or expenses, of every kind and character,
                           on account of or in connection with any injury, loss,
                           or damage to any person or property, or to the
                           environment, arising out of or in connection with the
                           removal or disposal of any hazardous substances by
                           the indemnifying party or by any person acting on the
                           indemnifying party's behalf, or arising out of or in
                           connection with the subsequent storage, processing or
                           other handling of such hazardous substances by any
                           person or entity after they have been removed by the
                           indemnifying party or persons acting on the
                           indemnifying party's behalf from the site of any SWBT
                           pole, duct, conduit, or right-of-way. For the
                           purposes of this subsection, any person or entity
                           removing or disposing of hazardous substances at the
                           request of the indemnifying party or at the request
                           of any person acting on the indemnifying party's
                           behalf, and any person or entity subsequently
                           receiving, storing, processing, or otherwise handling
                           such hazardous substances shall be considered to be a
                           person acting on the indemnifying party's behalf.

                  (d)      Except as otherwise specifically provided in this
                           section, neither party shall be required to indemnify
                           or defend the other party against, or hold the other
                           party harmless from any loss, damage, claim, demand,
                           suit, liability, fine, penalty or expense for which
                           the other party may be liable under any federal,
                           state, or local environmental statute, rule,
                           regulation, ordinance, or other law.

         21.11 Miscellaneous Claims. Applicant shall indemnify, on request
defend, and hold SWBT harmless from any and all suits, claims, demands, losses,
damages, liabilities, fines, penalties, and expenses, of every kind and
character, made, brought, or 



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sought against SWBT by any person or entity, arising out of or in connection
with the subject matter of this Agreement and based on either:

                  (a)      claims for taxes, municipal fees, franchise fees,
                           right-to-use fees, and other special charges assessed
                           on SWBT due to the placement or presence of
                           Applicant's facilities on or within SWBT's poles,
                           ducts, conduits, or rights-of-way; or

                  (b)      claims based on the violation by Applicant of any
                           third party's intellectual property rights, including
                           but not limited to claims for copyright infringement,
                           patent infringement, or unauthorized use or
                           transmission of television or radio broadcast
                           programs or other program material.

         21.12 Applicant's General Indemnity Obligations to SWBT. This section
applies only in those situations not expressly covered by Sections 21.05-21.11
and does not apply to any suit, claim, demand, loss, damage, or expense
resulting from Applicant's enforcement of its rights against SWBT pursuant to
this Agreement or other provisions in the parties' interconnection agreement, if
any. Except as otherwise expressly provided in this Agreement to the contrary,
and subject to the exclusions set forth in Section 21.04, Applicant shall
indemnify, on request defend, and hold SWBT harmless from any and all suits,
claims, demands, losses, damages, liabilities, fines, penalties, and expenses,
of every kind and character, on account of or in connection with any injury,
loss, or damage to any person or property, or to the environment, arising out of
or in connection with Applicant's access to or use of SWBT's poles, ducts,
conduits, or rights-of-way, Applicant's performance of any acts authorized under
this Agreement, or the presence or activities of Applicant's employees or other
personnel acting on Applicant's behalf on, within, or in the vicinity of SWBT's
poles, ducts, conduits, or rights-of-way.

         21.13 SWBT's General Indemnity Obligations to Applicant. This section
applies only in those situations not expressly covered by Sections 21.05-21.10
and does not apply to any suit, claim, demand, loss, damage, or expense
resulting from SWBT's enforcement of its rights against Applicant pursuant to
this Agreement or other provisions in the parties' interconnection agreement, if
any. Except as otherwise expressly provided in this Agreement to the contrary,
SWBT shall indemnify, on request defend, and hold Applicant harmless from any
and all suits, claims, demands, losses, damages, liabilities, fines, penalties,
and expenses, of every kind and character, on account of or in connection with
any injury, loss, or damage to any person or property, or to the environment,
arising out of or in connection with SWBT's access to or use of SWBT's poles,
ducts, conduits, or rights-of-way, SWBT's performance of any acts authorized
under this Agreement, or the presence or activities of SWBT's employees or other
personnel acting on SWBT's behalf on, within, or in the vicinity of SWBT's
poles, ducts, conduits, or rights-of-way.



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         21.14 No Rights, Claims, Causes of Action, or Remedies for the Benefit
of Third Parties. Nothing contained in this article is intended to create any
rights, claims, causes of action, or remedies for the benefit of any third
party.

         21.15 Assertion of Limitation of Liability Defenses. Each party shall
diligently assert the limitation of liability provisions of any applicable
tariff or contract in any case involving injury, loss, or damage to any customer
of such party for which the other party is not exempt from indemnification
liabilities to the indemnified party under this Agreement.

         21.16 Indemnity Liabilities Not Subject to Article 22 Limitations of
Liability. Indemnity liabilities under this article shall not be subject to
Article 22 limitations of liability.

         21.17 Defense of Suits. Upon request by the indemnified party, the
indemnifying party shall defend any suit brought against the indemnified party
for any injury, loss, or damage subject to indemnification under this Agreement.
The indemnified party shall notify the indemnifying party promptly in writing of
any written claims, lawsuits, or demands for which the indemnifying party may be
responsible under this Agreement. The indemnified party shall cooperate in every
reasonable way to facilitate defense or settlement. The indemnifying party shall
have the right to control and conduct the defense and settlement of any action
or claim subject to consultation of the indemnified party. The indemnifying
party shall not be responsible for any settlement unless the indemnifying party
approved such settlement in advance and agrees to be bound by the settlement
agreement.

              ARTICLE 22: LIABILITIES AND LIMITATIONS OF LIABILITY

         22.01 LIMITATIONS OF LIABILITY WITH RESPECT TO NEGLIGENT ACTS AND
OMISSIONS. THIS ARTICLE INCLUDES PROVISIONS LIMITING THE LIABILITIES OF EACH
PARTY ARISING OUT OF OR IN CONNECTION WITH CERTAIN NEGLIGENT ACTS AND OMISSIONS
OF SUCH PARTY.

         22.02 LIMITATIONS OF LIABILITY IN GENERAL. EXCEPT AS OTHERWISE
EXPRESSLY PROVIDED IN SECTIONS 21.16 AND 22.05, NEITHER PARTY'S LIABILITY TO THE
OTHER PARTY FOR DAMAGES ATTRIBUTABLE, IN WHOLE OR IN PART, TO ANY NEGLIGENT ACT
OR OMISSION IN THE PERFORMANCE OF THIS AGREEMENT, WHETHER ARISING IN CONTRACT OR
TORT, SHALL EXCEED IN THE AGGREGATE FOR ANY CALENDAR YEAR THE GREATER OF
$250,000, OR THE TOTAL AMOUNT CHARGED BY SWBT TO APPLICANT UNDER THIS AGREEMENT
FOR THE CALENDAR YEARS WHEN THE ACTS OR OMISSIONS GIVING RISE TO LIABILITY
OCCURRED. NOTHING CONTAINED IN THIS SECTION SHALL BE CONSTRUED AS LIMITING
EITHER PARTY'S LIABILITY FOR ACTS OR OMISSIONS 



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CONSTITUTING WILLFUL OR INTENTIONAL MISCONDUCT OR GROSS NEGLIGENCE BY SUCH
PARTY.

         22.03 EXCLUSION OF LIABILITY FOR SPECIAL, INDIRECT, OR CONSEQUENTIAL
DAMAGES. NEITHER PARTY SHALL BE LIABLE TO THE OTHER PARTY FOR ANY INDIRECT,
SPECIAL, CONSEQUENTIAL, INCIDENTAL, OR PUNITIVE DAMAGES, INCLUDING BUT NOT
LIMITED TO LOSS OF ANTICIPATED PROFITS OR REVENUE OR OTHER ECONOMIC LOSS IN
CONNECTION WITH OR ARISING FROM ANY ACT OR FAILURE TO ACT PURSUANT TO THIS
AGREEMENT, EVEN IF THE OTHER PARTY HAS ADVISED SUCH PARTY OF THE POSSIBILITY OF
SUCH DAMAGES. THIS SECTION LIMITS EACH PARTY'S LIABILITY FOR INDIRECT, SPECIAL,
CONSEQUENTIAL, INCIDENTAL, OR PUNITIVE DAMAGES ARISING OUT OF OR IN CONNECTION
WITH NEGLIGENT (INCLUDING GROSSLY NEGLIGENT) ACTS OR OMISSIONS OF SUCH PARTY BUT
DOES NOT LIMIT EITHER PARTY'S LIABILITY FOR INTENTIONAL MISCONDUCT.

         22.04 SWBT Not Liable to Applicant for Acts of Third Parties or Acts of
God. By affording Applicant access to poles, ducts, conduits, and rights-of-way
owned or controlled by SWBT, SWBT does not warrant, guarantee, or insure the
uninterrupted use of such facilities by Applicant. Except as specifically
provided in Section 22.05 of this Agreement, Applicant assumes all risks of
injury, loss, or damage (and the consequences of any such injury, loss, or
damage) to Applicant's facilities attached to SWBT's poles or placed in SWBT's
ducts, conduits, or rights-of-way, and SWBT shall not be liable to Applicant for
any damages to Applicant's facilities other than as provided in Section 22.05.
In no event shall SWBT be liable to Applicant under this Agreement for any
injury, loss, or damage resulting from the acts or omissions of (1) any joint
user or any person acting on a joint user's behalf, (2) any governmental body or
governmental employee, (3) any third-party property owner or persons acting on
behalf of such property owner, or (4) any licensee, invitee, trespasser, or
other person present at the site or in the vicinity of any SWBT pole, duct,
conduit, or right-of-way in any capacity other than as a SWBT employee or person
acting on SWBT's behalf. In no event shall SWBT be liable to Applicant under
this Agreement for injuries, losses, or damages resulting from acts of God
(including but not limited to storms, floods, fires, and earthquakes), wars,
civil disturbances, espionage or other criminal acts committed by persons or
entities not acting on SWBT's behalf, cable cuts by persons other than SWBT's
employees or persons acting on SWBT's behalf, or other causes beyond SWBT's
control which occur at sites subject to this Agreement.

         22.05 Damage to Facilities. Except as otherwise specifically provided
in this section, neither party shall be liable to the other party for any
injury, loss, or damage (or for the direct or indirect consequences of any such
injury, loss, or damage) to such other party's facilities attached to SWBT's
poles or placed within or in the vicinity of SWBT's poles, ducts, conduits, or
rights-of-way.




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                  (a)      Each party (the "responsible party"), and persons
                           acting on behalf of the responsible party, shall
                           exercise due care to avoid damaging the facilities of
                           the other party (the "injured party"). In the event
                           such damage occurs, the responsible party or persons
                           acting on behalf of the responsible party shall
                           immediately report such damages to the injured party,
                           and the injured party shall promptly make such
                           arrangements as may be necessary to restore service
                           to its customers using the facilities affected.

                  (b)      The responsible party shall reimburse the injured
                           party for the actual costs incurred by the injured
                           party for repair of facilities damaged by the willful
                           misconduct, grossly negligent acts, grossly negligent
                           omissions, and negligent acts (but not negligent
                           omissions other than grossly negligent omissions) of
                           employees of the responsible party.

                  (c)      The responsible party shall reimburse the injured
                           party for the actual costs incurred by the injured
                           party for repair of facilities damaged by the willful
                           misconduct, grossly negligent acts or omissions, and
                           negligent acts (but not negligent omissions other
                           than grossly negligent omissions) of independent
                           contractors acting on the responsible party's behalf;
                           provided, however, that the injured party shall be
                           limited to recovery of those costs which cannot be
                           recovered from the independent contractor causing the
                           damage. The responsible party shall not be liable to
                           the injured party under this section until the
                           injured party's claims against the independent
                           contractor causing the damage have been adjudicated
                           or settled and the amount of the injured party's
                           claim against the responsible party is determinable.

                  (d)      NEITHER PARTY SHALL BE REQUIRED BY THIS SECTION TO
                           REIMBURSE THE OTHER PARTY FOR COSTS INCURRED AS A
                           RESULT OF NEGLIGENT OMISSIONS OTHER THAN GROSSLY
                           NEGLIGENT OMISSIONS COVERED BY SUBSECTIONS (c)-(d) OF
                           THIS SECTION.

                  (e)      THIS SECTION LIMITS, BUT DOES NOT EXCLUDE, THE
                           RESPONSIBLE PARTY'S LIABILITY TO THE INJURED PARTY
                           FOR DAMAGES CAUSED BY NEGLIGENT (INCLUDING GROSSLY
                           NEGLIGENT) ACTS OF THE RESPONSIBLE PARTY AND PERSONS
                           ACTING ON THE RESPONSIBLE PARTY'S BEHALF.

         22.06 No Limitations of Liability in Contravention of Federal or State
Law. Nothing contained in this article shall be construed as exempting either
party from any liability, or limiting such party's liability, in contravention
of federal law or in contravention of the laws of this State.




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         22.07 Claims Against Third Parties. Nothing contained in this article
shall be construed as requiring either party to forego any claims that such
party may have against third parties, including but not limited to contractors,
subcontractors, or persons (other than the other party's employees) acting on
the other party's behalf.

                              ARTICLE 23: INSURANCE

         23.01 Insurance Required. Applicant shall comply with the insurance
requirements specified in this section.

                  (a)      Unless Applicant has provided proof of self-insurance
                           as permitted in Section 23.02 below, Applicant shall
                           obtain and maintain in full force and effect, for so
                           long as this Agreement remains in effect, insurance
                           policies specified in APPENDIX IV of this Agreement.
                           Each policy shall name SWBT as an additional insured
                           and shall include provisions requiring the insurer to
                           give SWBT notice of any lapse, cancellation, or
                           termination of the policy or any modification to the
                           policy affecting SWBT's rights under the policy,
                           including but not limited to any decrease in coverage
                           or increase in deductibles.

                  (b)      Except as provided in this subsection, exclusions
                           from coverage or deductibles, other than those
                           expressly permitted in APPENDIX IV, must be approved
                           in writing by SWBT. For authorized contractors and
                           other contractors performing work on, within, or in
                           the vicinity of SWBT's poles, ducts, conduits, and
                           rights-of-way on Applicant's behalf, exclusions from
                           coverage or deductibles, other than those expressly
                           permitted in APPENDIX IV, must be approved in writing
                           by Applicant.

                  (c)      Authorized contractors and other contractors
                           performing work on, within, or in the vicinity of
                           SWBT's poles, ducts, conduits, or rights-of-way on
                           Applicant's behalf shall be required to meet the same
                           insurance requirements applicable to contractors
                           performing similar work on SWBT's behalf. Applicant
                           shall be responsible for securing compliance by its
                           contractors with this requirement and shall be liable
                           to SWBT for any damages resulting from its failure to
                           do so.

                  (d)      Self-insurance shall be permitted for persons and
                           entities (including but not limited to Applicant and
                           authorized contractors) meeting the self-insurance
                           requirements set forth in Section 23.02.

         23.02 Proof of Insurance or Self-insurance. Proof of insurance or
self-insurance shall be made pursuant to the provisions of this section.





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                  (a)      Applicant shall submit to SWBT adequate proof (as
                           determined by SWBT) that the companies insuring
                           Applicant are providing all coverages required by
                           this Agreement. Applicants insurers shall provide
                           SWBT with certifications that required coverages will
                           not be cancelled, changed or materially altered
                           (e.g., by increasing deductibles or altering
                           exclusions from coverage) except after 30 days
                           written notice to SWBT.

                  (b)      SWBT will accept certified proof of a person or
                           entity's qualification as a self-insurer for Workers'
                           Compensation and Employers Liability, where
                           self-insurance is permitted, upon receipt of a
                           current copy of a Certificate of Authority to
                           Self-insure issued by the Workers' Compensation
                           Commission of this State. SWBT will accept
                           self-insurance by a person or entity in lieu of other
                           Commercial General Liability and Automobile Liability
                           Coverage if such person or entity warrants that its
                           net worth, as shown by its most recent audited
                           financial statement with no negative notes, is at
                           least 10 times the minimum liability limits set forth
                           in APPENDIX IV and SWBT is satisfied that such entity
                           will be able to meet its liability obligations under
                           this Agreement.

                  (c)      Applicant shall be responsible for determining
                           whether contractors and other persons present on
                           Applicant's behalf on, within, and in the vicinity of
                           SWBT's poles, ducts, conduits, and rights-of-way meet
                           the self-insurance requirements of this subsection.
                           Applicant may accept certified proof of any such
                           person's or entity's qualification as a self-insurer
                           for Workers' Compensation and Employers Liability,
                           where self-insurance is permitted, upon receipt of a
                           current copy of a Certificate of Authority to
                           Self-insure issued by the Workers' Compensation
                           Commission of this State. Applicant may accept proof
                           of self-insurance by a person or entity in lieu of
                           other Commercial General Liability and Automobile
                           Liability Coverage if such person or entity warrants
                           that its net worth, as shown by its most recent
                           audited financial statement with no negative notes,
                           is at least 10 times the minimum liability limits set
                           forth in APPENDIX IV and Applicant is satisfied that
                           such entity will be able to meet its liability
                           obligations with respect to activities performed on,
                           within, and in the vicinity of SWBT's poles, ducts,
                           conduits, and rights-of-way.

         23.03 Licensing Contingent on Proof of Insurance. All insurance
required in accordance with APPENDIX IV, or self-insurance as permitted in
Section 23.02, must be in effect before SWBT will issue pole attachment or
conduit occupancy licenses under this Agreement and shall remain in force until
all of Applicant's facilities have been removed from SWBT's poles, ducts,
conduits, and rights-of-way.



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         23.04 Failure to Obtain or Maintain Coverage. Applicant's failure to
obtain and maintain the required levels and types of insurance coverage required
under this Agreement shall be grounds for termination of this Agreement and
licenses subject to this Agreement. If an insurance carrier shall at any time
notify Applicant or SWBT that any policy or policies of insurance required under
this Agreement will be cancelled or changed in any manner which will result in
Applicant's failure to meet the requirements of this Agreement, SWBT may
terminate this Agreement and all licenses subject to this Agreement not less
than 60 days after giving Applicant written notice of its intention to do so,
and such termination shall be effective on the termination date specified in the
notice unless Applicant has obtained (or made arrangements satisfactory to SWBT
to obtain) the required coverage from another source. In the alternative, SWBT
may, in its sole discretion, elect to take such action as may be necessary to
keep such policy in effect with the required coverages.

                        ARTICLE 24: ASSIGNMENT OF RIGHTS

         24.01 Assignment Permitted. Neither party may assign or otherwise
transfer its rights or obligations under this Agreement except as provided in
this section.

                  (a)      SWBT may assign its rights, delegate its benefits,
                           and delegate its duties and obligations under this
                           Agreement, without Applicant's consent, to any entity
                           controlling, controlled by, or under common control
                           with SWBT or which acquires or succeeds to ownership
                           of substantially all of SWBT's assets.

                  (b)      Applicant may assign its rights, delegate its
                           benefits, and delegate its duties and obligations
                           under this Agreement, without SWBT's consent, to: any
                           telecommunications carrier or cable system operator
                           which (1) is entitled to access to SWBT's poles,
                           ducts, conduits, and rights-of-way under the Pole
                           Attachment Act and (2) controls, is controlled by, or
                           is under common control with Applicant or acquires
                           and succeeds to ownership of substantially all of
                           Applicant's assets; provided, however, that such
                           assignment shall not be effective until Applicant has
                           given SWBT written notice of the assignment pursuant
                           to Section 24.03 and guaranteed the performance of
                           Applicant's assignee or successor. Applicant's
                           assignee or successor shall assume all outstanding
                           obligations of Applicant under this Agreement,
                           including but not limited to all liabilities and
                           contingent liabilities of Applicant arising out of or
                           in connection with this Agreement.

                  (c)      Applicant may, ancillary to a bona fide loan
                           transaction between Applicant and any lender, and
                           without SWBT's consent, grant security interests or
                           make collateral assignments in substantially all of
                           Applicant's assets, including Applicant's rights
                           under this Agreement, subject to the express terms of
                           this Agreement. In the event Applicant's 



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                           lender, in the bona fide exercise of its rights as a
                           secured lender, forecloses on its security interest
                           or arranges for a third party to acquire Applicant's
                           assets through public or private sale or through an
                           Agreement with Applicant, Applicant's lender or the
                           third party acquiring Applicant's rights under this
                           Agreement shall assume all outstanding obligations of
                           Applicant under the agreement and provide proof
                           satisfactory to SWBT that such lender or third party
                           has complied or will comply with all requirements
                           established under this Agreement. Notwithstanding any
                           provisions of this Agreement to the contrary, such
                           foreclosure by Applicant's lender or acquisition of
                           assets by such third party shall not constitute a
                           breach of this Agreement and, upon such foreclosure
                           or acquisition, Applicant's lender or such third
                           party shall succeed to all rights and remedies of
                           Applicant under this Agreement (other than those
                           rights and remedies, if any, which have not been
                           transferred and, if Applicant is a debtor under the
                           Federal Bankruptcy Code, those rights, if any, which
                           remain a part of the debtor's estate notwithstanding
                           an attempted foreclosure or transfer) and to all
                           duties and obligations of Applicant under the
                           Agreement, including liability to SWBT for any act,
                           omission, default, or obligation that arose or
                           occurred under the Agreement prior to the date on
                           which such lender or third party succeeds to the
                           rights of Applicant under the Agreement, as
                           applicable.

                           (1)      In the event Applicant or Applicant's lender
                                    requests that SWBT, in connection with a
                                    bona fide loan transaction between Applicant
                                    and Applicant's lender, sign any additional
                                    consents, or make other accommodations to
                                    protect such lender's interest, Applicant or
                                    Applicant's lender shall reimburse SWBT for
                                    all expenses incurred by SWBT in connection
                                    with such requests and accommodations,
                                    including but not limited to in-house or
                                    outside legal expenses incurred by SWBT in
                                    processing the request.

                           (2)      In the event Applicant or Applicant's lender
                                    desires that SWBT provide notices to
                                    Applicant's lender or permit Applicant's
                                    lender, in the event of a breach, to cure
                                    any default or termination event if
                                    Applicant fails to do so, Applicant shall
                                    notify SWBT's authorized agent, as
                                    designated in Article 29 of this Agreement,
                                    that such notices may be sent to Applicant's
                                    lender as well to Applicant. Nothing
                                    contained in this subsection shall be
                                    construed as imposing any duty on SWBT in
                                    favor of Applicant's lender, and this
                                    section shall not be construed to provide
                                    Applicant's lender or any other third
                                    parties with any rights, claims, causes of
                                    action of any kind. Applicant waives any and
                                    all claims or causes of action, of every
                                    kind and character, past, present, or
                                    future, arising out of or in 




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                                connection with the giving of any notice to
                                Applicant's lender pursuant to this section or
                                any failure to give such notice.

                  (d)      Either party may assign or transfer rights or
                           obligations under this Agreement on such terms and
                           conditions as are mutually acceptable to the other
                           party and with such other party's prior written
                           consent, which consent may be withheld only for due
                           cause and justification.

                  (e)      No assignment or transfer by Applicant of rights
                           under this Agreement, licenses subject to this
                           Agreement, or authorizations granted under this
                           Agreement shall be effective until Applicant, its
                           successors, and assigns have complied with the
                           provisions of this article, secured SWBT's prior
                           written consent to the assignment or transfer, if
                           necessary, and given SWBT notice of the assignment or
                           transfer pursuant to Section 24.03.

                  (f)      Except as otherwise expressly provided in this
                           article, neither this Agreement, nor any licenses or
                           authorizations subject to this Agreement, shall inure
                           to the benefit of Applicant's successors or assigns
                           without SWBT's prior written consent.

         24.02 Incorporations, Mergers, Acquisitions and Other Changes in
Applicant's Legal Identity. When the legal identity or status of Applicant
changes, whether by incorporation, reincorporation, merger, acquisition, or
otherwise, such change shall be treated as an assignment subject to the
provisions of this article.

         24.03 Notice of Assignment. Applicant shall provide SWBT with 60 days
advance notice in writing of any assignment.

         24.04 Assignment Shall Not Relieve Applicant of Prior Obligations.
Except as otherwise expressly agreed by SWBT in writing, no assignment permitted
by SWBT under this Agreement shall relieve Applicant of any obligations arising
under or in connection with this Agreement, including but not limited to
indemnity obligations under Article 21 of this Agreement or the interconnection
agreement, if any.

         24.05 Satisfaction of Existing Obligations and Assumption of Contingent
Liabilities. SWBT may condition its approval of any requested assignment or
transfer on the assignee's or successor's payment or satisfaction of all
outstanding obligations of Applicant under this Agreement and the assignee's or
successor's assumption of any liabilities, or contingent liabilities, of
Applicant arising out of or in connection with this Agreement.

         24.06 Satisfaction of All Other Licensing Requirements. Applicant's
assignee or successor must, within 60 days following the assignment, provide
proof satisfactory to SWBT that such assignee or successor has complied or will
comply with all licensing requirements established under this Agreement,
including but not limited to requirements 




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that such assignee or successor verify, to the best of its information and
belief, as provided in Section 17.03, that all facilities owned or used by such
assignee or successor and presently attached to SWBT's poles or placed within
any portion of SWBT's conduit system within this State have been disclosed to
SWBT and are subject to existing licenses and that such assignee or successor
has complied with the insurance requirements set forth in Article 23 of this
Agreement.

         24.07 Additional Post-Assignment Requirements. Applicant's assignee or
successor shall, within 60 days following the assignment:

                  (a)      sign this Agreement as an assignee or successor
                           expressly agreeing to be bound by all provisions of
                           this Agreement and licenses subject to this
                           Agreement;

                  (b)      provide proof, satisfactory to SWBT, of such
                           assignee's assumption of the obligations of this
                           Agreement; and

                  (c)      pay a one-time contract administration fee, as
                           provided in APPENDIX I of this Agreement, if no
                           Master Agreement for Access to SWBT's Poles, Ducts,
                           Conduits, or Rights-of-Way between SWBT and such
                           assignee is in effect for this State, or an
                           administrative record-keeping fee as provided in
                           APPENDIX I of this Agreement, if there is a Master
                           Agreement in effect for this State.

         24.08 Sublicenses Prohibited. Nothing contained in this Agreement shall
be construed as granting Applicant the right to sublicense any rights under this
Agreement or licenses subject to this Agreement to any third party. Except as
otherwise expressly permitted in this Agreement, Applicant shall not allow third
party to attach or place facilities to or in pole or conduit space occupied by
or assigned to Applicant or to utilize such space.

                ARTICLE 25: TERMINATION OF AGREEMENT OR LICENSES;
                              REMEDIES FOR BREACHES

         25.01 Termination Due to Non-Use of Facilities or Loss of Required
Authority. Applicant shall, by written notice to SWBT, terminate this Agreement
and all licenses subject to this Agreement if Applicant ceases to have authority
to do business or ceases to do business in this State, ceases to have authority
to provide or ceases to provide cable television services in this State (if
Applicant is cable television system having access to SWBT's poles, ducts,
conduits or rights-of-way solely to provide cable television service), ceases to
have authority to provide or ceases to provide telecommunications services in
this State (if Applicant is a telecommunications carrier which does not also
have authority to provide cable television service in this State), or ceases to
make active use of SWBT's poles, ducts, conduits, and rights-of-way in this
State. Applicant shall, by written notice to SWBT, terminate individual licenses
subject to this Agreement if (a) 



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Applicant ceases to utilize the pole attachment or conduit occupancy space
subject to such licenses or (b) Applicant's permission to use or have access to
particular poles, ducts, conduits, or rights-of-way has been revoked, denied, or
terminated for reasons of safety or any other lawful reason by any federal,
state, or local governmental authority or third-party property owner having
authority to revoke, deny, or terminate such use or access. Responsibility for
terminating this Agreement or individual licenses under the circumstances set
forth in this section shall be a contractual obligation imposed on Applicant,
and the failure by Applicant to terminate this Agreement or individual licenses
pursuant to this section shall be a material breach of this Agreement.

         25.02 Limitation, Termination, or Refusal of Access for Certain
Material Breaches. Applicant's access to SWBT's poles, ducts, conduits, and
rights-of-way shall not materially interfere with or impair service over any
facilities of SWBT or any joint user, cause material damage to SWBT's plant or
the plant of any joint user, impair the privacy of communications carried over
the facilities of SWBT or any joint user, or create serious hazards to the
health or safety of any persons working on, within, or in the vicinity of SWBT's
poles, ducts, rights-of-way or to the public. Upon reasonable notice and
opportunity to cure, SWBT may limit, terminate or refuse access if Applicant
violates this provision; provided, however, that such limitation, termination or
refusal will be limited to Applicant's access to poles, ducts, conduits, and
rights-of-way located in the SWBT construction district in which the violation
occurs, shall be as narrowly limited in time and geographic scope as may be
necessary to enable Applicant to adopt suitable controls to prevent further
violations, and shall be subject to review, at Applicant's request, pursuant to
the dispute resolution procedures set forth in this Agreement (or, if
applicable, the parties' interconnection agreement) or, as permitted by law,
before any court, agency, or other tribunal having jurisdiction over the subject
matter. In the event Applicant invokes dispute resolution procedures or seeks
review before a court, agency, or other tribunal having jurisdiction of the
subject matter, the limitation, termination, or refusal of access may be stayed
or suspended by agreement of the parties or by order of the tribunal having
jurisdiction over the parties' dispute.

         25.03 Notice and Opportunity to Cure Breach. In the event of any
claimed breach of this Agreement by either party, the aggrieved party may give
written notice of such claimed breach as provided in this section.

                  (a)      The notice shall set forth in reasonable detail:

                           (1)      the conduct or circumstances complained of,
                                    together with the complaining party's legal
                                    basis for asserting that a breach has
                                    occurred;

                           (2)      the action believed necessary to cure the 
                                    alleged breach; and

                           (3)      any other matter the complaining party 
                                    desires to include in the notice.




                                    PAGE 95
<PAGE>   392
                  (b)      Except as provided in Section 25.02 and subsection
                           (c) of this section, the complaining party shall not
                           be entitled to pursue any remedies available under
                           this Agreement or relevant law unless such notice is
                           given and (1) the breaching party fails to cure the
                           breach within 30 days of such notice, if the breach
                           is one which can be cured within 30 days, or (2) the
                           breaching party fails to commence promptly and pursue
                           diligently a cure of the breach, if the required cure
                           is such that more than 30 days will be required to
                           effect such cure; provided, however, that nothing
                           contained in this section shall preclude either party
                           from invoking the dispute resolution procedures set
                           forth in Article 30 of this Agreement, or any
                           complaint or dispute resolution procedures offered by
                           the FCC or State Commission, at any time.

                  (c)      Nothing contained in this section shall preclude
                           either party from filing a complaint or bringing suit
                           in any court, agency, or other tribunal of competent
                           jurisdiction to restrain or enjoin any conduct of the
                           other party which threatens the complaining party
                           with irreparable injury, loss or damage without first
                           giving the notice otherwise required by subsection
                           (b).

         25.04 Remedies for Breach. Subject to the provisions of this article
and the dispute resolution procedures of Article 30, either party may terminate
this Agreement in the event of a material breach by the other party or exercise
any other legal or equitable right which such party may have to enforce the
provisions of this Agreement. Except as otherwise specifically provided in
Section 30.07, in any action based on an alleged breach of this Agreement, the
prevailing party shall be entitled to recover all costs and expenses incurred by
such party, including but not limited to reasonable attorneys' fees.

                         ARTICLE 26: FAILURE TO ENFORCE

         26.01 No Waiver. The failure by either party to take action to enforce
compliance with any of the terms or conditions of this Agreement, to give notice
of any breach, or to terminate this Agreement or any license or authorization
subject to this Agreement shall not constitute a waiver or relinquishment of any
term or condition of this Agreement, a waiver or relinquishment of the right to
give notice of breach, or waiver or relinquishment of any right to terminate
this Agreement. Notwithstanding any such failure, all terms and conditions of
this Agreement and all rights of either party hereunder shall be and remain at
all times in full force and effect.

           ARTICLE 27: EFFECTIVE DATE, TERM, AND ELECTIVE TERMINATION

         27.01 Effective Date. This Agreement shall be effective as of the 30th
day of June, 1997, or, if this Agreement has been entered into as an appendix,
attachment, or exhibit to an interconnection agreement between the parties, the
date of 



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approval by the State Commission of the interconnection agreement, whichever
date first occurs.

         27.02 Initial Term. Unless sooner terminated as herein provided, the
initial term of this Agreement shall run from the effective date until the end
of the calendar year which includes the effective date.

         27.03 Automatic Renewal. Unless sooner terminated as herein provided,
this Agreement shall be automatically renewed for successive one-year terms
beginning on the first day of each calendar year after the effective date.

         27.04 Elective Termination. Either party may terminate this Agreement
by giving the other party at least six months prior written notice as provided
in this section.

                  (a)      Applicant may terminate this Agreement with or
                           without cause.

                  (b)      The parties acknowledge that the Pole Attachment Act,
                           47 U.S.C. s.224(e), as added by the
                           Telecommunications Act of 1996, expressly directs the
                           FCC to promulgate new regulations governing charges
                           to telecommunications carriers for access to poles,
                           ducts, conduits, and rights-of-way and that such new
                           regulations are to take effect five years after the
                           date of enactment of the Telecommunications Act of
                           1996 (that is, February 8, 2001). The parties further
                           acknowledge that due to nondiscrimination
                           requirements, it is desirable that formal attachment
                           agreements establishing rates, terms, and conditions
                           of access be revised simultaneously, to the extent
                           possible. Accordingly, the parties agree that SWBT
                           may terminate this Agreement only for cause during
                           the period beginning with the effective date of this
                           Agreement through February 8, 2001. Thereafter, SWBT
                           may terminate this Agreement with or without cause,
                           subject to the provisions of subsection (d) and
                           Section 27.05 below.

                  (c)      The notice of termination shall state the effective
                           date of termination, which date shall be no earlier
                           than the last to occur of the following dates: the
                           last day of the current term of this Agreement or six
                           months after the date the notice is given.

                  (d)      The elective termination of this Agreement by SWBT
                           under this section shall not require immediate
                           removal of Applicant's facilities from poles, ducts,
                           conduits, and rights-of-way owned or controlled by
                           SWBT and shall be subject to the provisions of
                           Section 27.05 below; provided, however, that
                           Applicant shall, within 60 days after the effective
                           date of the termination, either initiate negotiations
                           for continued access to SWBT's poles, ducts,
                           conduits, and rights-of-way or remove its 



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                           facilities in accordance with the provisions of
                           Article 18 of this Agreement.

         27.05 Effect of Elective Termination. Elective termination of this
Agreement by Applicant, as permitted under Section 27.04 of this Agreement,
shall not affect Applicant's liabilities and obligations incurred under this
Agreement prior to the effective date of termination and shall not entitle
Applicant to the refund of any advance payment made to SWBT under this
Agreement. Elective termination of this Agreement by SWBT shall not affect
SWBT's obligations to afford access to SWBT's poles, ducts, conduits, and
rights-of-way owned or controlled by SWBT as required by the Pole Attachment
Act, the Telecommunications Act of 1996, and other applicable laws, regulations,
and commission orders.

                   ARTICLE 28: CONFIDENTIALITY OF INFORMATION

         28.01 Information Provided by Applicant to SWBT. Except as otherwise
specifically provided in this Agreement, all company-specific and
customer-specific information submitted by Applicant to SWBT in connection with
this Agreement (including but not limited to information submitted in connection
with Applicant's applications for the assignment of pole attachment and
occupancy space and for pole attachment and conduit occupancy licenses) shall be
deemed to be "confidential" or "proprietary" information of Applicant and shall
be subject to the terms set forth in this article. Confidential or proprietary
information specifically includes information or knowledge related to
Applicant's review of records regarding a particular market area, or relating to
assignment of space to Applicant in a particular market area, and further
includes knowledge or information about the timing of Applicant's request for or
review of records or its inquiry about SWBT facilities. This article does not
limit the use by SWBT of aggregate information relating to the occupancy and use
of SWBT's poles, ducts, conduits, and rights-of-way by firms other than SWBT
(that is, information submitted by Applicant and aggregated by SWBT in a manner
that does not directly or indirectly identify Applicant).

         28.02 Access Limited to Persons with a Need to Know. Confidential or
proprietary information provided by Applicant to SWBT in connection with this
Agreement shall not be disclosed to, shared with, or accessed by any person or
persons (including but not limited to personnel involved in sales, marketing,
competitive intelligence, competitive analysis, strategic planning, and similar
activities) other than those who have a need to know such information for the
limited purposes set forth in Sections 28.03-28.06.

         28.03 Permitted Uses of Applicant's Confidential Information.
Notwithstanding the provisions of Sections 28.01 and 28.02 above, SWBT and
persons acting on SWBT's behalf may utilize Applicant's confidential or
proprietary information for the following purposes: (a) posting information, as
necessary, to SWBT's outside plant records; (b) placing, constructing,
installing, operating, utilizing, maintaining, monitoring, inspecting,


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repairing, relocating, transferring, conveying, removing, or managing SWBT's
poles, ducts, conduits, and rights-of-way and any SWBT facilities located on,
within, or in the vicinity of such poles, ducts, conduits, and rights-of-way;
(c) performing SWBT's obligations under this Agreement and similar agreements
with third partis; (d) performing SWBT's general obligations to afford
nondiscriminatory access to telecommunications carriers and cable television
systems under the Pole Attachment Act; (e) determining which of SWBT's poles,
ducts, conduits, and rights-of-way are (or may in the future be) available for
SWBT's own use, and making planning, engineering, construction, and budgeting
decisions relating to SWBT's poles, ducts, conduits, and rights-of-way; (f)
preparing cost studies; (g) responding to regulatory requests for information;
(h) maintaining SWBT's financial accounting records; and (i) complying with
other legal requirements relating to poles, ducts, conduits, and rights-of-way.

         28.04 Access by Third Parties. Information reflecting the assignment of
pole attachment and conduit occupancy space to Applicant may be made available
to personnel of third parties seeking access to SWBT's records under provisions,
and subject to protections, equivalent to those contained and required by
Section 7.03 of this Agreement.

         28.05 Defense of Claims. In the event of a dispute between SWBT and any
person or entity, including Applicant, concerning SWBT's performance of this
Agreement, satisfaction of obligations under similar agreements with third
parties, compliance with the Pole Attachment Act, compliance with the
Telecommunications Act of 1996, or compliance with other federal, state, or
local laws, regulations, commission orders, and the like, SWBT may utilize
confidential or proprietary information submitted by Applicant in connection
with this Agreement as may be reasonable or necessary to demonstrate compliance,
protect itself from allegations of wrongdoing, or comply with subpoenas, court
orders, or reasonable discovery requests; provided, however, that SWBT shall not
disclose Applicant's proprietary or confidential information without first, at
SWBT's option: (a) obtaining an agreed protective order or nondisclosure
agreement that preserves the confidential and proprietary nature of Applicant's
information; (b) seeking such a protective order as provided by law if no agreed
protective order or nondisclosure agreement can be obtained; or (c) providing
Applicant notice of the subpoena, demand, or order and an opportunity to take
affirmative steps of its own to protect such proprietary or confidential
information.

         28.06 Response to Subpoenas, Court Orders, and Agency Orders. Nothing
contained in this article shall be construed as precluding SWBT from complying
with any subpoena, civil or criminal investigative demand, or other order issued
or entered by a court or agency of competent jurisdiction; provided, however,
that SWBT shall not disclose Applicant's proprietary or confidential information
without first, at SWBT's option: (a) obtaining an agreed protective order or
nondisclosure agreement that preserves the confidential and proprietary nature
of Applicant's information; (b) seeking such a protective order as provided by
law if no agreed protective order or nondisclosure agreement can be obtained; or
(c) providing Applicant notice of the subpoena, demand, 



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or order and an opportunity to take affirmative steps of its own to protect such
proprietary or confidential information.

         28.07 Other Uses of Confidential Information. No other uses of
confidential information received from Applicant pursuant to this Agreement are
authorized or permitted without Applicant's express written consent.

                               ARTICLE 29: NOTICES

         29.01 Notices to Applicant. Except as otherwise provided in APPENDIX VI
("Notices to Applicant"), all written notices required to be given to Applicant
shall be delivered or mailed to Applicant's duly authorized agent or attorney,
as designated in this section.

                  (a)      Such notice may be delivered to Applicant's duly
                           authorized agent or attorney in person or by agent or
                           courier receipted delivery.

                  (b)      Such notice may be mailed to Applicant's duly
                           authorized agent or attorney by registered or
                           certified mail, return receipt requested. When notice
                           is given by mail, such notice shall be complete upon
                           deposit of the notice, enclosed in a postpaid,
                           properly addressed wrapper, in a post office or
                           official depository under the care and control of the
                           United States Postal Service and shall be deemed to
                           have been given three days after the date of deposit.

                  (c)      Applicant may authorize delivery of the notice by
                           telephonic document transfer to the Applicant's duly
                           authorized agent or attorney. Notice by telephonic
                           document transfer after 5:00 p.m. local time of the
                           recipient shall be deemed given on the following day.

                  (d)      Notices to Applicant shall be sent to the authorized
                           agent or attorney designated below:

                           Name: RICHARD D. WEINSTEIN
                                 ------------------------------

                           Title: PRESIDENT
                                  -----------------------------

                           Firm: DIGITAL TELEPORT, INC.
                                 ------------------------------

                           Address: 11111 DORSETT ROAD
                                    ---------------------------         

                           City/State/Zip: ST. LOUIS, MO 63043
                                           --------------------

         29.02 Notices to SWBT. Except as otherwise provided in APPENDIX VII
("Notices to SWBT"), all written notices required to be given to SWBT shall be



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delivered or mailed to SWBT's duly authorized agent or attorney, as designated
in this section.

                  (a)      Such notice may be delivered to SWBT's duly
                           authorized agent or attorney in person or by agent or
                           courier receipted delivery.

                  (b)      Such notice may be mailed to SWBT's duly authorized
                           agent or attorney by registered or certified mail,
                           return receipt requested. When notice is given by
                           mail, such notice shall be complete upon deposit of
                           the notice, enclosed in a postpaid, properly
                           addressed wrapper, in a post office or official
                           depository under the care and control of the United
                           States Postal Service and shall be deemed to have
                           been given three days after the date of deposit.

                  (c)      SWBT may authorize delivery of the notice by
                           telephonic document transfer to SWBT's duly
                           authorized agent or attorney. Notice by telephonic
                           document transfer after 5:00 p.m. local time of the
                           recipient shall be deemed given on the following day.

                  (d)      On the effective date of this Agreement, and until
                           further notice to Applicant, SWBT's duly authorized
                           agent shall be the Utility Liaison Supervisor ("ULS")
                           designated in APPENDIX VIII.

         29.03 Changes in Notice Requirements. Either party may, from time to
time, change notice addressees and addresses by giving written notice of such
change to the other party. Such notice shall state, at a minimum, the name,
title, firm, and full address of the new addressee.

                         ARTICLE 30: DISPUTE RESOLUTION

         30.01 Purpose. The provisions of this article are intended to minimize
litigation between the parties with respect to disputes arising in connection
with this Agreement and shall be construed accordingly. Any dispute between the
parties arising under this Agreement may be submitted by either party for
resolution under this article.

         30.02 Exclusive Remedy for Monetary Claims under $25.000. Except for
actions seeking injunctive relief related to the purposes of this Agreement or
suits to compel compliance with the dispute resolution processes set forth in
this article, the parties agree to use the dispute resolution processes set
forth in this Agreement as their sole remedy with respect to any monetary claim
of $25,000 or less which arises out of or in connection with this Agreement.

         30.03 Prerequisite to Litigation. The provisions of this article shall
also apply to all disputes, without regard to the amount in controversy, in
which Applicant contests charges billed by SWBT to Applicant under the terms of
this Agreement. No suit, except 



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for actions seeking injunctive relief related to the purposes of this Agreement
or suits to compel compliance with the dispute resolution processes set forth in
this article, shall be filed by either party against the other with respect to
such contested charges until the parties have engaged in good faith negotiations
as provided in Section 30.04, and, if the parties agree, in mediation under
Section 30.05.

         30.04 Good Faith Negotiation. Good faith negotiation as provided in
this section shall be the first step in the dispute resolution process.

                  (a)      With respect to any dispute subject to the provisions
                           of this article, either party may initiate
                           negotiation proceedings by writing a certified or
                           registered letter to the other party setting forth
                           the particulars of the dispute, the terms of the
                           Agreement that are involved, and a suggested
                           resolution of the problem.

                  (b)      The recipient of the letter shall respond within 21
                           days to the proposed solution. The recipient shall
                           either agree to the proposed solution or explain its
                           disagreement.

                  (c)      If the correspondence does not resolve the dispute,
                           each party, at the request of either party, will
                           appoint a knowledgeable, responsible representative
                           to meet and negotiate in good faith to resolve the
                           dispute. The location, form, frequency, duration, and
                           conclusion of these discussions shall be left to the
                           discretion of the representatives. Upon agreement,
                           the representatives may utilize other alternative
                           dispute resolution procedures such as mediation to
                           assist in the negotiations.

                  (d)      Discussions and correspondence among the
                           representatives as provided by this section are for
                           purposes of settlement, are exempt from discovery and
                           production, and shall not be admissible in
                           arbitration, judicial, regulatory, or other
                           proceedings in any forum.

         30.05 Mediation. If the parties agree to mediation, the mediation may
be conducted as provided in this section or in such other manner as may be
mutually agreeable to the parties.

                  (a)      If agreed to by the parties, the dispute shall be
                           referred to the nearest office of the American
                           Arbitration Association, or such other mediator as
                           may be selected by agreement of the parties, for
                           mediation, that is, an informal, non-binding
                           conference or conferences between the parties in
                           which a mediator will seek to guide the parties to a
                           resolution of the dispute.

                  (b)      If the dispute is referred to the American
                           Arbitration Association, the parties are free to
                           select any mutually acceptable panel member from the
                     



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                           list of mediators at the American Arbitration
                           Association. If the parties cannot agree or have no
                           particular choice of a mediator and simply request
                           that the American Arbitration Association assign a
                           mediator to the dispute, then a list and resumes of
                           available mediators, numbering one more than there
                           are parties, will be sent to the parties, each of
                           whom may strike one name leaving the remaining name
                           as the mediator. If more than one name remains, the
                           designated mediator shall be selected by the
                           Administrator of the American Arbitration Association
                           from the remaining names.

                  (c)      Mediation sessions shall be private.

                  (d)      All records, reports or other documents considered by
                           the mediator shall be confidential.

                  (e)      The parties agree that the mediator shall not be
                           compelled to divulge confidential materials or to
                           testify about the mediation in arbitration,
                           regulatory, judicial, or other proceedings in any
                           forum.

                  (f)      The parties agree to maintain the confidentiality of
                           the mediation and shall not rely on, or introduce as
                           evidence in any arbitration, judicial, or other
                           proceeding:

                           (1)      views expressed or suggestions made by the
                                    other party with respect to a possible
                                    settlement of the dispute;

                           (2)      admissions made by the other party during
                                    the mediation proceedings;

                           (3)      proposals made or views expressed by the
                                    mediator; or

                           (4)      the fact that the other party had or had not
                                    indicated willingness to accept a proposal
                                    for settlement made by the mediator.

                  (g)      Subsections (e) and (f) of this section shall apply
                           to anything said, done or occurring in the course of
                           the mediation, including any private caucus or
                           discussions between the mediator and any party or
                           counsel before or after the joint mediation session.
                           There shall be no stenographic record of the
                           mediation process, except to memorialize a settlement
                           record.

                  (h)      The mediation process shall be considered settlement
                           negotiation for the purpose of all state and federal
                           rules protecting disclosures made during such
                           conferences from later discovery or use in evidence.
                           All conduct, statements, promises, offers, views, and
                           opinions, oral or written, made during the mediation
                           by any party or a party's agent, employee, or
                  


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                           attorney are confidential and, where appropriate, are
                           to be considered work product and privileged. Such
                           conduct, statements, promises, offers, views, and
                           opinions shall not be subject to discovery or
                           admissible for any purpose, including impeachment, in
                           any litigation or other proceeding involving the
                           parties; provided, however, that evidence otherwise
                           subject to discovery or admissible is not excluded
                           from discovery or admission in evidence simply as a
                           result of its having been used in connection with
                           this settlement process.

         30.06 Arbitration. If negotiations and mediations do not resolve the
dispute within 90 days after the initiation of dispute resolution proceedings as
provided in subsection (a) of Section 30.04 of this Agreement, the dispute shall
be submitted to binding arbitration by a single arbitrator pursuant to the
Commercial Arbitration Rules of the American Arbitration Association if the
dispute involves any monetary claim of $25,000 or less which arises out of or in
connection with this Agreement. The parties may voluntarily elect to arbitrate
disputes in which the amount in controversy exceeds $25,000, but they shall not
be required by this Agreement to do so.

                  (a)      Either party may demand such arbitration in
                           accordance with the procedures set out in the
                           Commercial Arbitration Rules.

                  (b)      Discovery shall be controlled by the arbitrator and
                           shall be permitted to the extent set out in this
                           subsection.

                           (1)      Each party may submit in writing to any
                                    other party, and such other party shall so
                                    respond, to a maximum of any combination of
                                    35 of the following: interrogatories,
                                    document production requests, and requests
                                    for admissions. The interrogatories,
                                    document production requests, and requests
                                    for admissions shall not have subparts.

                           (2)      Additional discovery may be permitted upon
                                    mutual agreement of the parties or upon
                                    order of the arbitrator on a showing of good
                                    cause.

                  (c)      The arbitrator shall control the scheduling so as to
                           process the matter expeditiously. The times set forth
                           in this subsection shall apply unless extended upon
                           mutual agreement of the parties or by the arbitrator
                           on a showing of good cause.

                           (1)      The arbitration hearing shall commence
                                    within 60 days of the demand for arbitration
                                    and shall be held, in the absence of
                                    agreement by the parties to a different
                                    venue, in St. Louis, Missouri.

                           (2) The parties shall submit written briefs five days
                               before the hearing.



                                    PAGE 104



<PAGE>   401




                           (3)      The arbitrator shall rule on the dispute by
                                    issuing a written opinion within 30 days
                                    after the close of hearings.

                           (4)      The arbitrator shall have no authority to
                                    order punitive or consequential damages.

                           (5)      Judgment upon the award rendered by the
                                    arbitrator may be entered in any court of
                                    competent jurisdiction.

         30.07 Costs. Except as specifically provided in this section, each
party shall bear its own costs of all dispute resolution procedures under this
article.

                  (a) A party seeking discovery shall reimburse the
                      responding party for the costs incurred by the
                      responding party in producing documents.

                  (b) The parties shall equally split the fees of the
                      arbitration and the arbitrator.

         30.08 No Abridgment of Rights under the Communications Act of 1934 or
the Pole Attachment Act. Nothing contained in this article shall abridge the
rights of either party to seek relief from the FCC with respect to any dispute
subject to the jurisdiction of the FCC under the Communications Act of 1934 or
the Pole Attachment Act, or from the State Commission with respect to any
dispute subject to its jurisdiction, except that the parties may not seek relief
from the FCC or the State Commission with respect to any dispute that has
already been resolved by mediation under Section 30.05 or by binding arbitration
under Section 30.06.

                        ARTICLE 31: ACCESS TO APPLICANT'S
                    POLES, DUCTS, CONDUITS, AND RIGHTS-OF-WAY

         31.01 No Reciprocal Access to Applicant's Facilities. This Agreement
does not include provisions for reciprocal access by SWBT to Applicant's poles,
ducts, conduits, and rights-of-way.

                         ARTICLE 32: GENERAL PROVISIONS

         32.01 Entire Agreement. This Agreement, together with the
interconnection agreement, if any, to which this Agreement is an appendix,
attachment, or exhibit, sets forth the entire understanding and agreement of the
parties.

         32.02 Prior Agreements Superseded. This Agreement supersedes all prior
agreements and understandings, whether written or oral, between Applicant and
SWBT relating to the placement and maintenance of Applicant's facilities on and
within SWBT's poles, ducts, and conduits within this State.



                                    PAGE 105


<PAGE>   402




         32.03 Amendments Shall Be in Writing. Except as otherwise specifically
provided to the contrary by other provisions of this Agreement, the terms and
conditions of this Agreement shall not be amended, changed or altered except in
writing and with approval by authorized representatives of both parties.

         32.04 Survival of Obligations. Any liabilities or obligations of either
party for acts or omissions prior to the termination of this Agreement, any
obligations of either party under provisions of this Agreement relating to
confidential and proprietary information, indemnification, limitations of
liability, and any other provisions of this Agreement which, by their terms, are
contemplated to survive (or be performed after) termination of this Agreement,
will survive the termination of this Agreement.

         32.05 Multiple Counterparts.  This Agreement may be executed in 
multiple counterparts.

         32.06 Effect on Licenses Issued Under Prior Agreements. All currently
effective pole attachment and conduit occupancy licenses granted to Applicant
shall, on the effective date of this Agreement, be subject to the rates, terms,
conditions, and procedures set forth in this Agreement.

         32.07 Force Majeure. Except as otherwise specifically provided in this
Agreement, neither party will be liable for any delay or failure in performance
of any part of this Agreement caused by a Force Majeure condition, including
acts of the United States of America or any state, territory, or political
subdivision thereof, acts of God or a public enemy, fires, floods, disputes,
freight embargoes, earthquakes, volcanic actions, wars, civil disturbances,
cable cuts, or other causes beyond the reasonable control of the party claiming
excusable delay or other failure to perform; provided, however, that Force
Majeure will not include acts of any governmental authority relating to
environmental, health, or safety conditions at work locations. If any Force
Majeure condition occurs, the party whose performance fails or is delayed
because of such Force Majeure condition will give prompt notice to the other
party, and, upon cessation of such Force Majeure condition, will give like
notice and commence performance hereunder as promptly as reasonably practicable.

         32.08 Severability. If any article, section, subsection, or other
provision or portion of this Agreement is or becomes invalid under any
applicable statute or rule of law, and such invalidity does not materially alter
the essence of this Agreement as to either party, the invalidity of such
provision shall not render this entire Agreement unenforceable and this
Agreement shall be administered as if it did not contain the invalid provision.

         32.09 Choice of Law. Except to the extent that federal law controls any
aspect of this Agreement, the validity of this Agreement, the construction and
enforcement of its terms, and the interpretation of the rights and duties of the
parties will be governed by 



                                    PAGE 106



<PAGE>   403



the laws of this State, applied without regard to the provisions of this State's
laws relating to conflicts-of-laws.

         32.10 Changes in the Law. Because the primary purpose of this Agreement
is to provide access to poles, ducts, conduits, and rights-of-way in accordance
with the Pole Attachment Act, as amended by the Telecommunications Act of 1996
and subsequent amendments, the parties contemplate that changes in this
Agreement may from time to time be necessary or desirable to conform to changes
in the Pole Attachment Act as that Act is amended, interpreted, and applied.
This Agreement is based in large part on regulatory decisions by the FCC, which
has jurisdiction over the rates, terms, and conditions of access to poles,
ducts, conduits, and rights-of-way (except to the extent that such jurisdiction
has been pre-empted by individual states) and decisions by the State Commission.
More specifically, this Agreement is based in large part on the FCC's First
Interconnection Order in CC Docket No. 96-98, on FCC rules announced with the
First Interconnection Order, and on Arbitration Orders by the State Commission.

                  [X]      Applicant desires to have access to SWBT's poles,
                           ducts, conduits, and rights-of-way on terms that are
                           not less favorable than those obtained by firms
                           participating in interconnection arbitration
                           proceedings before the State Commission. Applicant
                           also desires to have access to SWBT's poles, ducts,
                           conduits, and rights-of-way to the full extent
                           permitted under the FCC's First Interconnection Order
                           in CC Docket No. 96-98. SWBT is entering into this
                           Agreement for the purpose of providing
                           nondiscriminatory access in compliance with the Pole
                           Attachment Act and regulatory decisions thereunder,
                           including decisions by the State Commission in
                           interconnection arbitration proceedings in which
                           Applicant is not a party. Each party is entering into
                           this Agreement based on current interpretations of
                           the law by the FCC and State Commission. In the event
                           of any changes in the Pole Attachment Act, changes in
                           applicable FCC or State Commission rulings, or
                           judicial determinations that such rulings are
                           erroneous or invalid, each party shall, at the
                           request of the other, engage in good faith
                           negotiations to supplement, amend or replace any
                           provisions of this Agreement affected by such changes
                           or determinations and to conform this Agreement to
                           changes in the underlying laws on which the Agreement
                           is based.

                  [  ]     This Agreement has been entered into as a result of
                           private negotiation between the parties and
                           arbitration by the State Commission, acting pursuant
                           to the Telecommunications Act of 1996. If the actions
                           of any legislative bodies, courts, or regulatory
                           agencies of competent jurisdiction invalidate,
                           modify, or stay the enforcement of laws, rules,
                           regulations, or commission orders that were the basis
                           for a provision of this Agreement (including but not
                           limited to any provision of this Agreement required
                           by any arbitration 



                                    PAGE 107




<PAGE>   404



                           award approved by the State Commission), the affected
                           provision shall be invalidated, modified, or stayed
                           as required by action of the legislative body, court,
                           or regulatory agency. In the event of such a change
                           in the law, each party shall expend diligent efforts
                           to arrive at an agreement respecting the
                           modifications to the Agreement required by the law or
                           requested in good faith by the other party. If
                           negotiations fail, disputes between the parties
                           concerning interpretation of the actions required or
                           provisions affected by such governmental actions
                           shall be resolved pursuant to the dispute resolution
                           process provided for in the interconnection agreement
                           or this Agreement; provided, however, that this
                           section shall not be construed as precluding either
                           party from seeking appropriate relief from the FCC in
                           connection with the parties' rights and obligations
                           under the Pole Attachment Act. In the event of any
                           material change in the law, each party agrees to
                           enter into good faith negotiations to conform this
                           Agreement to the changes in the law.



                                    PAGE 108



<PAGE>   405



THIS AGREEMENT IS A BINDING ARBITRATION PROVISION WHICH MAY BE ENFORCED BY THE
PARTIES.

SOUTHWESTERN BELL TELEPHONE COMPANY

By: /s/  Daniel Goodwin
    -------------------------------------------------------------
    Signature of SWBT's Authorized Officer/Employee

    Daniel Goodwin 
    -------------------------------------------------------------
    Name of SWBT's Authorized Officer/Employee (Printed or Typed)

    Utilities Liasion Supervisor
    -------------------------------------------------------------
    Position/Title of SWBT's Authorized Officer/Employee

    7-2-97
    -------------------------------------------------------------
    Date

    St. Louis, MO 63101
    -------------------------------------------------------------
    City and State of Execution by SWBT



DIGITAL TELEPORT. INC.
- ----------------------------------------------------------------
Applicant's Name (Printed or Typed)

By: /s/  Richard D. Weinstein
    -------------------------------------------------------------
    Signature of Applicant's Authorized Officer/Employee

    RICHARD D. WEINSTEIN
    -------------------------------------------------------------
    Name of Authorized Officer/Employee (Printed or Typed)

    PRESIDENT
    -------------------------------------------------------------
    Position/Title of Authorized Officer/Employee

    6/30/97
    -------------------------------------------------------------
    Date

    St. Louis, MO
    -------------------------------------------------------------
    City and State of Execution by Applicant



                                    PAGE 109


<PAGE>   406





                                          Agreement No.________________________

                                   APPENDIX I
           SCHEDULE OF RATES, FEES AND CHARGES (MISSOURI)--PAGE 1 OF 5

         This Appendix is an integral part of the Master Agreement for Access to
Poles, Ducts, Conduits, and Rights-of-Way to which it is attached and sets forth
the rates, fees and charges to be paid by Applicant to SWBT pursuant to the
Master Agreement and licenses subject to the Master Agreement. The rates, fees,
and charges set forth in this Appendix shall be subject to all applicable laws,
rules, regulations, and commission orders as provided in Section 19.01 of the
Master Agreement and shall be subject to revision as provided in Section 19.12
of the Master Agreement.

A)       Pole Attachment Fees

         1)       General

                  a)       For billing purposes, pole attachments shall be
                           considered i) to have commenced on the first to occur
                           of the following dates: the date of assignment (or
                           provisional assignment) of pole attachment space, the
                           date a license for such pole attachment is issued, or
                           the date of actual attachment and ii) to have ended
                           on the last to occur of the following dates: the date
                           Applicant's assignment lapses or is relinquished, the
                           date of actual removal of the attached facilities
                           from SWBT's pole, or the date of termination of
                           Applicant's license.

                  b)       Fees shall be payable semiannually in advance on the
                           first days of January and July and shall be prorated
                           on a daily basis as provided in Section 19.04. Fees
                           for pole attachments shall be based on the number of
                           pole attachments as of the date of billing. If
                           Applicant occupies more than one usable space on a
                           pole, separate attachment fees shall apply to each
                           space occupied. For billing purposes, a single pole
                           attachment includes the point of attachment and all
                           facilities located in the usable space on the pole in
                           the space assigned to Applicant (typically six inches
                           above and six inches below the point of attachment),
                           together with routine ancillary apparatus such as
                           anchors, anchor/guy strands, drive rings, J-hooks,
                           dead-end clamps, and other apparatus which does not
                           interfere with the ability of SWBT to occupy or
                           assign usable space on the pole other than the usable
                           space licensed to Applicant. Fees for pole space
                           assignments and unauthorized pole attachments shall
                           be billed in the same manner as if a license had been
                           issued.


         2)       Fees (1997 Rates)


<TABLE>
<CAPTION>


                  Semiannual Pole Attachment Fees                      Annual           Semiannual
                  -------------------------------                      ------           ----------
                 <S>                                                  <C>              <C>
                  Per pole attachment (cable service only)             $ 2.35           $1.175
                                                                       ------           ------
                  Per pole attachment (telecommunications carriers)    $ 2.35           $1.175
                                                                       ------           ------
                  Per pole attachment (other)                          $  N/A           $  N/A
                                                                       ------           ------
</TABLE>




<PAGE>   407




                                   APPENDIX I
             SCHEDULE OF FEES AND CHARGES (MISSOURI) - PAGE 2 OF 5



B)       Conduit Occupancy Fees

         (1)      General

                  a)       For billing purposes, conduit occupancy shall be
                           considered to have i) begun on the first to occur of
                           the following dates: the date of assignment (or
                           provisional assignment) of conduit occupancy space,
                           the date a license for such conduit occupancy is
                           issued, or the date of actual occupancy; and ii)
                           ended on the last to occur of the following dates:
                           the date Applicant's assignment lapses or is
                           relinquished, the date of actual removal of the
                           attached facilities from SWBT's conduit, or the date
                           of termination of Applicant's license. Occupancy ends
                           when facilities have been removed from SWBT's conduit
                           system and required post-removal procedures (e.g.,
                           plugging ducts) have been completed. Fees for
                           conduit space assignments and unauthorized conduit
                           occupancy shall be billed in the same manner as if a
                           license had been issued.

                  b)       Fees shall be payable semiannually in advance on the
                           first days of January and July.

         (2)      Fees (1997 Rates)


<TABLE>
<CAPTION>

                  Semiannual Per Foot Conduit Occupancy Fees             Annual         Semiannual
                  ------------------------------------------             ------         ----------
                 <S>                                                  <C>              <C>      
                  Full duct/duct foot (cable service only)             $ 0.40/ft        $ 0.20/ft
                                                                       ---------        ---------
                  Full duct/duct foot (telecommunications carriers)    $ 0.40/ft        $ 0.20/ft
                                                                       ---------        ---------
                  Full duct/duct foot (other)                          $     N/A        $     N/A
                                                                       ---------        ---------

                  Half duct/duct foot(cable service only)*             $ 0.20/ft        $ 0.10/ft
                                                                       ---------        ---------
                  Half duct/duct foot (telecommunications carriers)*   $ 0.20/ft        $ 0.10/ft
                                                                       ---------        ---------
                  Half duct/duct foot (other)*                         $     N/A        $     N/A
                                                                       ---------        ---------
</TABLE>


                           *Each inner duct is billed at the half duct rate.


                  a)       Facility footage shall be measured i) from the center
                           of one manhole to the center of an adjacent manhole
                           if the facility runs between two manholes, ii) from
                           the center of a manhole to the end of a duct not
                           terminated in a manhole, or iii) from the center of a
                           manhole to the property line if the duct is connected
                           at the property line to a duct owned and controlled
                           by a third-party property owner.

                  b)       Semiannual full duct conduit occupancy fees will
                           apply to the first facility placed in a previously
                           unoccupied duct except as provided in c)-d) below.




<PAGE>   408

                                   APPENDIX I
              SCHEDULE OF FEES AND CHARGES (MISSOURI) - PAGE 3 OF 5


                  c)       If two or more facilities occupy a duct that has not
                           been subdivided by inner duct, a semiannual half duct
                           conduit occupancy fee will be charged for each
                           facility placed in the duct.

                  d)       A semiannual half duct occupancy fee will apply to
                           the first facility placed by Applicant in a
                           previously unoccupied duct that has not been
                           subdivided by inner duct if and only if the presence
                           of Applicant's facility does not render the other
                           half of the duct unusable by others.

                  e)       When Applicant's facilities are installed within
                           inner duct, a single semiannual one-half duct conduit
                           occupancy fee will apply to each inner duct occupied.

C)       Application Fees. No application fees shall be charged for the
         submission of access applications or provisional space assignments.

D)       Pre-license Survey Work. Charges for pre-license survey work are not
         set on a fixed fee basis and will be determined on a case-by-case. If
         pre-license survey work is performed by SWBT's contractors, Applicant
         shall reimburse SWBT for the actual out-of-pocket costs incurred by
         SWBT for such work. If pre-license survey work is performed by SWBT
         employees, pre-license survey charges shall be computed by multiplying
         the applicable hourly rates times the number of hours reasonably spent
         by SWBT's employees on pre-license survey work.

E)       Facilities Modification, Capacity Expansion, and Make-ready Work.
         Charges for facilities modification, capacity expansion, and make-ready
         work are not set on a fixed fee basis and will be determined in a
         case-by-case basis. In all cases, except as otherwise specifically
         provided to the contrary in the Master Agreement, such charges shall
         include the costs of materials required to perform the work. If such
         work is performed by SWBT's contractors, Applicant shall reimburse SWBT
         for the actual out-of-pocket costs incurred by SWBT for such work. If
         such work is performed by SWBT employees, charges for such work shall
         be computed by multiplying the applicable hourly rates times the number
         of hours reasonably spent by SWBT's employees on the work. No later
         than 45 days after receipt by SWBT of Applicant's completed
         application, or within such other period as may be mutually agreed upon
         in writing by the parties, SWBT will furnish Applicant an estimate of
         the charges for facilities modification, capacity expansion, and
         make-ready work. Except as otherwise specifically provided in other
         parts of this Agreement, Applicant will pay half of SWBT's estimated
         charges at 50 percent job completion and the remainder at 100 percent
         completion. SWBT may, at its election, require Applicant to pay SWBT's
         out-of-pocket costs for materials as those costs are incurred and may
         require Applicant to pay outside contractor costs on the same schedule
         SWBT pays such outside contractors. Bills and invoices submitted by
         SWBT to Applicant for make-ready charges shall be due and payable 30
         days after the date of the bill or invoice.



<PAGE>   409

                                   APPENDIX I
              SCHEDULE OF FEES AND CHARGES (MISSOURI)--PAGE 4 OF 5



F)       Construction Inspectors. Subject to all applicable commission orders,
         where work is being performed on Applicant's behalf in SWBT's manholes
         or other portions of SWBT's conduit system, Applicant and SWBT shall
         equally share the costs attributable to having a construction inspector
         present when SWBT considers it necessary to have such an inspector
         present. SWBT shall not charge Applicant for more than one such
         construction inspector per site at any given time. If the construction
         inspector is a SWBT contractor, Applicant shall reimburse SWBT for
         one-half the actual out-of-pocket costs incurred by SWBT in connection
         with the presence of such inspector. If the construction inspector is a
         SWBT employee, charges for the construction inspector shall be computed
         by multiplying the applicable hourly rate times the number of hours
         reasonably spent by the employee as a construction inspector in
         connection with the project.

G)       Other Work Performed Pursuant to the Master Agreement. For all other
         work performed by SWBT's contractors pursuant to this Agreement,
         including but not limited to work performed in opening manholes and
         participating in work operations at Applicant's request, Applicant
         shall reimburse SWBT for the actual out-of-pocket costs incurred by
         SWBT in connection with the performance of such work. For all other
         work performed by SWBT's employees pursuant to this Agreement,
         including but not limited to work performed in opening manholes,
         providing access to and copies of records, and participating in work
         operations at Applicant's request, SWBT's charges shall be computed by
         multiplying the applicable hourly rates times the number of hours
         reasonably spent by SWBT's employees on such work.

H)       Contract Administration Fee and Administrative Record-keeping Fees.
         Subject to applicable commission orders, and pending the establishment
         of permanent cost-based rates, a one-time contract administration fee
         of $250.00 shall be due and payable at the time of the execution of the
         Master Agreement. Subject to applicable commission orders, SWBT may
         charge administrative record-keeping fees not exceeding $125.00 in
         connection with records and billing changes resulting from the sale,
         consolidation, or other transfer of Applicant's business or facilities,
         name changes, and the like. SWBT shall provide Applicant, on
         Applicant's request, a statement of the basis for the fees.

I)       Other Administrative and Ancillary Fees. No other administrative or
         ancillary fees are charged by SWBT on a fixed fee basis.

J)       Hourly Rates. Except as otherwise provided by any applicable law, rule,
         regulation, or commission order, hourly rates charged for SWBT
         employees shall be such employees' fully loaded hourly rates.

K)       Payment Date. For fees and charges other than charges for make-ready
         work, each bill or invoice submitted by SWBT to Applicant shall state
         the date that payment is due, which 




<PAGE>   410



                                   APPENDIX I
              SCHEDULE OF FEES AND CHARGES (MISSOURI)--PAGE 5 OF 5


         date shall be not less than 60 days after the date of the bill or
         invoice. For make-ready work, the payment due date shall be not less
         than 30 days after the date of the bill or invoice. Interest on past
         due charges shall accrue as provided in Section 19.11(a) of the Master
         Agreement.


<PAGE>   411
                                       Agreement No.____________________________


                                   APPENDIX II
                     IDENTIFICATION OF APPLICANT (MISSOURI)


         This Appendix is an integral part of the Master Agreement for Access to
Poles, Ducts, Conduits, and Rights-of-Way to which it is attached.

Applicant's legal name is:  Digital Teleport Inc.



Applicant's principal place of business is located in the State of MISSOURI

Applicant does business under the following assumed names:    NONE




Applicant is:

         [ ]      a corporation organized under the laws of the State of _______
                  charter no. ________________________;

         [ ]      a partnership organized under the laws of the State of ______;
                  or

         [ ]      another entity, as follows:__________________________________


Applicant represents that Applicant is:

         [ ]      (1)    a cable system (as defined in 47 U.S.C. s. 153(37) 
                         and 522(7)) seeking a pole attachment or conduit 
                         occupancy license solely to provide cable service (as 
                         defined in 47 U.S.C. s. 522(6);

         [X]      (2)    a telecommunications carrier, as defined in 47 U.S.C.
                         s. 153(49), as modified by 47 U.S.C. s. 224; or

         [ ]      (3)    a person or entity which is neither (1) nor (2) above, 
                         as follows:



<PAGE>   412


                                        Agreement No.
                                                      -------------------------



                                   APPENDIX II
                     IDENTIFICATION OF APPLICANT (MISSOURI)




- --------------------------------------------------------------------------------


<PAGE>   413





                                        Agreement No.
                                                      -------------------------


                                  APPENDIX III
                   ADMINISTRATIVE FORMS AND NOTICES (MISSOURI)


         This Appendix is an integral part of the Master Agreement for Access to
Poles, Ducts, Conduits, and Rights-of-Way to which it is attached and contains
administrative forms referred to in the Master Agreement or used in connection
with the provision of access to SWBT's poles, ducts, conduits, and
rights-of-way. The forms are forms presently in use and have not been conformed
to the Master Agreement. The forms may be further revised by SWBT to conform to
the Master Agreement and revised from time to time to reflect changes in the
applicable law, changes in the Master Agreement, and changes in the procedures
through which access to poles, ducts, conduits, and rights-of-way is afforded by
SWBT to Applicant and others.

         SW-9433:         Pole Attachments

         SW-9434:         Access Application and Make-Ready Authorization

         SW-9435:         Conduit Occupancy

         SW-9436A:        Notification of Surrender or Modification of Pole 
                          Attachment License by Licensee

         SW-9436B:        Notification of Surrender or Modification of Conduit 
                          Occupancy License by Applicant

         SW-9436C:        Notification of Unauthorized Attachments by Applicant



<PAGE>   414


<TABLE>
<S><C>
[LOGO]

Southwestern Bell Telephone
Retention Period:  Active, Plus Five Years                        Pole Attachments                 PAGE ___ OF ____ 
FIRM'S NAME:_____________________________          [  ]  Provisional, Records Based Assignment     TYPE:__________ 
AGREEMENT No.___________________________                      [ ] Pre-Occupancy Survey                       
APPLICATION No:__________________________                                                                    (CATV, Telecom, Other)
                                                                                                   Make Ready             Pole Mind
                                                                                                  Description             Apparatus
                                                                                                                          Height

                                                                                                                                    
Item     Record      Pole       Ownership             Street              Proposed     Guy         Make Ready                       
   #         #          #        SWBT or              Address            Attachment    Rq'd           Work                          
                                  Power                                    Height      Y or N        Y or N                         
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
         TOTAL


                     Number of Cables_____________________                             Other Notes:_________________________________
                     Weight/per ft. and Size/O.D. ____________                         _____________________________________________
                     Number and Types of Strands____________                           _____________________________________________



                                                 
                                                 
                                                 
                                                 
                                                 
                                                 
                                                 
                                                 
                                                 
                                                 
                                                 
                                                 
                                                 
                                                 
                                                 
                                                 
                                                 
                                                 
                                                 
                                                 
                                                 
                                                 
                                                 
                                                 
                                                 

                                                              Date:_____________
                                                              Time:_____________
         SIGNED:____________________________________                                   SIGNED:____________________________________
                  SWBT Representative                                                                   Applicant's Representative
                                                           /   / Official File Copy, If Checked in Red
</TABLE>
<PAGE>   415


                                     SW9433
                                POLE ATTACHMENTS
                                FORM INSTRUCTIONS

From SW9433 may be used for the following two purposes, Provisional, Records
Based Assignment or as the Pre-Occupancy Survey. The applicant may complete the
SW9433 and submit this to SWBT while reviewing the records and make a
Provisional, Records Based Assignment. The applicant will also use this form
when making the Pre-Occupancy Survey as a reference sheet of information
required for acquiring pole attachment space

REQUIRED INFORMATION FOR PROVISIONAL, RECORDS BASED ASSIGNMENT

FIRM'S NAME: Name of firm requesting pole attachment space.

AGREEMENT No.:  Number obtained from the Master Agreement Number.

APPLICATION No.: Will be provided by applicant in sequential ascending order.

[ ] Provisional, Records Based Assignment: Applicable when an applicant elects
to a Provisional, Records Based Assignment. The form will be signed and dated at
the bottom by both the applicant and the SWBT representative. A copy will be
provided to the applicant and the original will be maintained by SWBT.

Type:  The applicant states that they are a CATV, a Telecommunications Carrier 
or a firm other than the aforementioned two.

Record #: The SWBT paper record or the SWBT mechanized record number.

Pole #: Applicant will supply the pole number either from the SWBT Records or
from a field visit.

Ownership: Applicant will determine and post the ownership of the pole by
marking S for SWBT or P for Power Company based on SWBT's records.

Street Address:  Applicant will provide street address or geographical 
reference point of the pole.

Proposed Attachment Height:  Applicant will provide the proposed attachment 
height in feet and inches on the pole.

Guy Rq'd:  Not required for Provisional, Records Based assignment.

Make Ready Work:  Not required for Provisional, Records Based assignment.

Make Ready Description:  Not required for Provisional, Records Based assignment.

Pole Mntd Apparatus Height:  Not required for Provisional, Records Based 
assignment.

Weight/per ft. and Size/O.D.:  Applicant will provide.

Number and Types of Strands:  Applicant will provide the number and types of 
strands.

Other Notes:  Any other notes relevant to the request including any infrequent 
construction techniques.

Date:  The date the Provisional, Records Based Assignment was made.

Time:  The time the Provisional, Records Based Assignment was made.

Signed  (Applicant's  Representative):  Applicant's  Representative  signs 
that the Provisional, Records Based Assignment was made.

Signed (SWBT Representative):  SWBT's Representative signs that the Provisional,
Records Based Assignment was made.


<PAGE>   416


REQUIRED INFORMATION FOR PRE-OCCUPANCY SURVEY

FIRM'S NAME: Name of firm requesting pole attachment space.

AGREEMENT No.:  Number obtained from the Master Agreement Number.

APPLICATION No.:  Will be provided by SWBT.

[ ] Pre-Occupancy Survey: This would be checked when this form is being used as
a Pre-Occupancy Survey. The form would be completed in its entirety and signed
by the applicant and submitted to SWBT for review in obtaining pole attachment
space.

Type: The applicant states that they are a CATV, a Telecommunications Carrier or
a firm other than the aforementioned two.

Record #: The SWBT paper record or mechanized record number.

Pole #: Applicant will supply the pole number either from the SWBT Records or
from a field visit.

Ownership:  Applicant  will  determine  and  post the  ownership  of the pole by
marking S for SWBT or P for Power Company.

Street Address:  Applicant will provide street address or geographical reference
point of the pole.

Proposed  Attachment  Height:  Applicant  will provide the  proposed  attachment
height in feet and inches on the pole.

Guy Rq'd:  Applicant will state if a guy is required. (Yes or No).

Make Ready Work:  Applicant  will state if make ready work is required.  (Yes or
No).

Make  Ready  Description:  Applicant  will give  description  of make  ready 
work required.

Pole Mntd Apparatus  Height:  Applicant  will state any proposed  apparatus that
would be placed on the pole. (Terminal, etc.)

Number of Cables:  Applicant will state the number of cables that will be placed
on the pole.

Weight/per ft. and Size/O.D.: Applicant will provide.

Number and Types of  Strands:  Applicant  will  provide  the number and types of
strands.

Other Notes:  Any other notes  relevant to the request  including any infrequent
construction techniques.

Date:  The date the Pre-Occupancy Survey was submitted to SWBT.

Time:  The time the Pre-Occupancy Survey was submitted to SWBT.

Signed  (Applicant's  Representative):  Applicant's  Representative  signs  when
Pre-Occupancy Survey was submitted to SWBT.

Signed (SWBT  Representative):  SWBT's  Representative  signs when Pre-Occupancy
Survey was submitted to SWBT.




<PAGE>   417



<TABLE>
<CAPTION>


         Southwestern Bell Telephone                     Access Application and Make-Ready Authorization

Retention Period, Active , plus 5 years                  (Request for Access to Poles, Ducts, Conduit)
<S>                                 <C>                               <C>
Name of Applicant______________________________________________________________
Agreement No._________________________________________________________________
Application No.________________________________________________________________


                             Provisional Assignment

As specified in the attached documents, and in accordance with the terms and
conditions of the Master Agreement between SWBT and Applicant, application is
hereby made for a provisional assignment of space in anticipation of a
nonexclusive license of communication facilities to access the quantity of SWBT
facilities indicated below:

     ______  SWBT poles                _____  Feet SWBT Whole Duct         _______  Feet SWBT Innerduct

Applicant desires immediate assignment of space and acknowledges that the
effective date is ____________________. Applicant agrees to provide an
application for assignment/access/occupancy of the assigned space within 30 days
from the date of the assignment, or forfeit the assignment.
         Expiration Date:___________________



                           Assignment/Access/Occupancy


As specified in the attached documents, and in accordance with the terms and
conditions of the Master Agreement between SWBT and Applicant, application is
hereby made for occupancy of space through a nonexclusive license of
communication facilities to access the quantity of SWBT facilities indicated
below:


     ______  SWBT poles                ______  Feet SWBT Whole Duct           _______  Feet SWBT Innerduct

Application authorizes SWBT to perform the required pre-licensing survey
including any field inspections required to evaluate capacity, safety,
reliability, and engineering standards; and to determine the cost, if any, of
required modifications or make-ready work.
         Expiration Date:_____________________


Applicant's Estimated Construction Start Date:________________________
Applicant's Estimated Construction Completion Date:___________________
                           Authorized by Applicant:________________________________________
                                                     Signature                           Title
                                                     Date:____________________________

                                                  Make-Ready Work
         Estimated Costs                                      Hours                   Rate              Total
                  Constr. Labor                                ____        x     $                $
                  Material                                     XXX         x     $  XXX           $
                                                               ---
                  Engr. Design                                 ____        x     $                $
                                    Total                                                         $
Estimated SWBT Completion Date

/  /    No Make-Ready Work Required                      /  /  No Make-Ready Work Required under 8.03(a)

/  /    Make-Ready Work will be completed by applicant's authorized contractor.
/  /    I authorize SWBT to complete the required make-ready work.  Payments due upon 50% completion and 100%
        completion.  Costs will be based upon actual costs incurred by SWBT.  (This may vary depending on state)
___________________________________________________                              Date:_____________________________
Applicant's Signature                           Title

License No.                                              Authorized by SWBT:_____________________________
Date:_________________________                                                  Signature              Title
                                                     /  /    Official File Copy, If Checked In Red

</TABLE>
<PAGE>   418
                                     SW-9434
                 ACCESS APPLICATION AND MAKE-READY AUTHORIZATION
                                FORM INSTRUCTIONS
                                     5/5/97

Form SW-9434 is used to request access to poles, ducts, and conduit; to transmit
notice of Provisional Assignments; and to provide other information required in
the access process.

REQUIRED INFORMATION

NAME OF APPLICANT. Name of firm requesting space on poles or in conduit.

AGREEMENT NO.  Number obtained from the Master Agreement Number.

APPLICATION NO.  Will be provided by applicant in sequential ascending order.

PROVISIONAL ASSIGNMENT BOX DATA

         "ATTACHED DOCUMENTS" Copies of the Assignment Of Space Logs showing the
         applicant's entries for the requested space or completed Forms SW-9433
         or SW-9435 if appropriate. Assignment is not official until the
         required data is entered in the Assignment Of Space Log.

                _____ SWBT POLES The number of poles for which space is
                      requested.

                _____ FEET SWBT WHOLE DUCT The accumulated Center-to-Center
                      measurements for the Whole Duct to be occupied. To be used
                      ONLY FOR CABLES TOO LARGE IN DIAMETER (Typically copper
                      conductor cables.) to fit in SWBT standard innerduct

                _____ FEET SWBT INNERDUCT The accumulated Center-to-Center
                      measurements for the innerduct to be occupied.

         EFFECTIVE DATE IS date entered in Assignment Of Space Log

         PROVISIONAL ASSIGNMENT EXPIRATION DATE:  30 calendar days from the date
              entered in the Assignment of Space Log (i.e., Date Application
              must be submitted to hold the assignment of space.)

ASSIGNMENT/ACCESS/OCCUPANCY BOX DATA

         "ATTACHED DOCUMENTS"  Completed Forms SW-9433 and/or SW-9435.

                _____ SWBT POLES The number of poles to be accessed.

                _____ FEET SWBT WHOLE DUCT The accumulated Center-to-Center
                      measurements for the Whole Duct to be occupied. To be used
                      ONLY FOR CABLES TOO LARGE IN DIAMETER (Typically copper
                      conductor cables.) to fit in SWBT standard innerduct

                _____ FEET SWBT INNERDUCT The accumulated Center-to-Center
                      measurements for the innerduct to be occupied.

         EFFECTIVE DATE IS date entered in Assignment Of Space Log

         ASSIGNMENT EXPIRATION DATE: 12 Months from the date entered in
            Assignment Of Space Log (Date facilities must be placed to avoid
            forfeiture of assigned space.)


                                     PAGE 1
<PAGE>   419
                                     SW-9434
                   ACCESS APPLICATION AND MAKE-READY AUTHORIZATION
                                FORM INSTRUCTIONS
                                     5/5/97

APPLICANT'S ESTIMATED CONSTRUCTION START DATE: Current "best estimate" of the
date project construction will begin. "ASAP" IS NOT AN ACCEPTABLE DATE.

APPLICANT'S ESTIMATED CONSTRUCTION COMPLETION DATE: Current "best estimate" of
the date placements and splicing will be completed. "ASAP" IS NOT AN ACCEPTABLE
DATE.

AUTHORIZED BY APPLICANT: Signature and Title of the Applicant's representative
         authorizing the request for access and payment (if any) of related SWBT
         engineering charges in connection with such access.

DATE:    Date of authorization by Applicant's representative.

MAKE-READY WORK BOX DATA

         ESTIMATED COSTS: SWBT will calculate data for Construction Labor,
         Material, and Engineering Design hours and summarize the TOTAL
         estimated SWBT Make-Ready Costs.

         ESTIMATED SWBT COMPLETION DATE: SWBT Engineering will provide the
         estimated completion date of SWBT Make-Ready Work based upon current
         scheduling loads.

         [ ] NO MAKE-READY WORK REQUIRED. Applicant should check this box if it
         has determined that fully code/specifications-compliant access can be
         granted without any work or modifications by SWBT or other parties. If
         inner duct must be placed, box should not be checked.

         [ ] MAKE-READY WORK WILL BE COMPLETED BY APPLICANT'S AUTHORIZED
         CONTRACTOR. If Applicant plans to utilize a mutually approved
         authorized contractor to perform ALL the Make-Ready work, this box only
         should be checked.

         [ ] I AUTHORIZE SWBT TO COMPLETE THE REQUIRED MAKE-READY WORK.... If
         Applicant wants SWBT to perform all the Make-Ready Work, this box only
         should be checked.

         IF SOME MAKE-READY WORK MUST BE DONE BY SWBT AND SOME WILL BE DONE BY
         THE APPLICANT'S AUTHORIZED CONTRACTOR, THE LAST TWO BOXES SHOULD BE
         CHECKED. A DETAILED DESCRIPTION OF THE WORK TO BE DONE BY SWBT MUST BE
         INCLUDED.

         APPLICANT'S SIGNATURE, TITLE AND DATE:

                  If the No Make-Ready Work Required box is checked by
                  Applicant, Applicant's Signature confirms the accuracy of the
                  current Applicant construction schedule. If the Not Make-Ready
                  Work Required under 8.03(a) box is checked, Applicant confirms
                  conditions under 8.03 Immediate Occupancy apply.

                  If Make-Ready Work will be completed by Applicant's Authorized
                  contractor is checked, Applicant's signature concurs with any
                  changes in proposed Make-Ready work identified by SWBT and
                  confirms the accuracy of the current schedule.

                  If SWBT will perform any Make-Ready Work, Applicant's
                  signature authorizes payment to SWBT of actual cost to perform
                  the required make-ready work.

LICENSE NO. ______ AUTHORIZED BY SWBT: The SWBT State ULS will authorize, date,
         and issue the License No. on the SW-9434 which becomes the Applicant's
         License For Access.

<PAGE>   420
<TABLE>
<S><C>
[LOGO]
Southwestern Bell Telephone
Retention Period:  Active, Plus 5 Years                                   Conduit Occupancy                      PAGE ___ OF ____
FIRM'S NAME:____________________________                      [ ] Provisional, Records Based Assignment
AGREEMENT NO.___________________________                                [ ] Pre-Occupancy Survey                 TYPE:__________
APPLICATION NO:_________________________
                                                                                                              (CATV, Telecom, Other)
ITEM OPER. RECORD MANHOLE     STREET        DISTANCE TO   PROPOSED    MAKE READY        MAKE READY
 #    #       #     #         ADDRESS       NEXT MANHOLE   DUCT OR      WORK            DESCRIPTION
 1                                          (CTR TO CTR)  INNERDUCT    Y OR N
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
16
17
18
19
20
TOTAL
         NUMBER OF CABLES___________________            SPLICE INFORMATION MANHOLE  # ___________________, DETAILS ________________

         SIZE OF CABLE (O.D. INCHES)______________      SPLICE INFORMATION MANHOLE  # ____________________, DETAILS ________________

                                                        SLACK LOOP INFO. MANHOLE  # ____________________, DETAILS ________________

                                                        SLACK LOOP INFO. MANHOLE  # ____________________, DETAILS ________________

                                                     Date:_____________
                                                                         
                                                     Time:_____________
SIGNED:____________________________________                                 SIGNED:_________________________________
              SWBT Representative                                                      Applicant's Representative

                                            / / Official File Copy, If Checked in Red

                                                                                                                          SW-9435
</TABLE>

<PAGE>   421
                                    SW9435
                              CONDUIT OCCUPANCY
                              FORM INSTRUCTIONS

Form SW9435 may be used for the following two purposes, Provisional,
Records Based Assignment or as the Pre-Occupancy Survey. The applicant may
complete the SW9435 and submit this to SWBT while reviewing the records and make
a Provisional, Records Based Assignment. The applicant will also use this form
when making the Pre-Occupancy Survey as a reference sheet of information
required for acquiring duct and/or inner duct space.

REQUIRED INFORMATION FOR PROVISIONAL, RECORDS BASED ASSIGNMENT

FIRM'S NAME:  Name of firm requesting conduit space.

AGREEMENT No.:  Number obtained from the Master Agreement Number.

APPLICATION No. Will be provided by applicant in sequential ascending order.

[ ] Provisional, Records Based Assignment: Applicable when an applicant would
make a Provisional, Records Based Assignment. The form will be signed and dated
at the bottom by both the applicant and the SWBT representative. A copy will be
provided to the applicant and the original will be maintained by SWBT.

Type: Applicant indicates that they are a CATV, a Telecommunications Carrier or
a firm other than the aforementioned two.

Record #: This would refer to either the SWBT paper record or the SWBT
mechanized record number.

Manhole #: Applicant will supply each manhole number.

Street Address: Applicant will provide street address of the manhole, if 
applicable.

Proposed Duct or Inner duct: Applicant will state the number of ducts and/or
inner ducts.

Make Ready Work:  Not required for Provisional, Records Based assignment.

Make Ready Description:  Not required for Provisional, Records Based assignment.

Number of Cables:  Applicant will enter the number of cables.

Size of Cable (O.D. Inches): Applicant will enter size of cable.

Splice Information Manhole #: Not required for Provisional, Records Based
assignment. Details: Not required for Provisional, Records Based assignment.

Slack Loop Info. Manhole #: Not required for Provisional, Records Based
assignment.

Details:  Not required for Provisional, Records Based assignment.

Date:  The date the Provisional, Records Based Assignment was made.

Time:  The time the Provisional, Records Based Assignment was made.

Signed (Applicant's Representative): Applicant's Representative signs that the
Provisional, Records Based Assignment was made.

Signed (SWBT Representative): SWBT's Representative signs that the Provisional,
Records Based Assignment was made.

<PAGE>   422

REQUIRED INFORMATION FOR PRE-OCCUPANCY SURVEY

FIRM'S NAME:  Name of firm requesting conduit space.

AGREEMENT No.:  Number obtained from the Master Agreement Number.

APPLICATION No.: Will be provided by applicant in sequential ascending order.

[ ] Pre-Occupancy Survey: Applicable when this form is used as a Pre-Occupancy
Survey. The form would be completed in its entirety by the applicant and
submitted to SWBT for review in obtaining conduit space.

Type: Applicant indicates that they are a CATV, a Telecommunications Carrier or
a firm other than the aforementioned two.

Oper. #: Applicant will provide the operation number when required. The same
operation number may very well be referenced on an attached map.

Record #: This would refer to either the SWBT paper record or the SWBT
mechanized record number.

Manhole #: Applicant will supply each manhole number.

Street Address: Applicant will provide street address of the manhole, if
applicable.

Distance to Manhole: Applicant will state the distance from manhole to manhole
in feet.

Proposed Duct or Inner duct: Applicant will state the number of ducts and/or
inner ducts.

Make Ready Work: Applicant will state if make ready work is required. 
(Yes or No)

Make Ready Description: Applicant will give description of make ready work
required.

Number of Cables:  Applicant will indicate the number of cables.

Size of Cable (O.D. Inches): Applicant will indicate size of cable.

Splice Information Manhole #: Applicant will enter any relevant splice
information.

Details: Applicant will provide any relevant details regarding splice
information.

Slack Loop Info. Manhole #:  Applicant will provide.

Details:  Applicant will provide any relevant Slack Loop Information.

Date:  The date the Pre-Occupancy Survey was submitted to SWBT.

Time:  The time the Pre-Occupancy Survey was submitted to SWBT.

Signed (Applicant's Representative): Applicant's Representative signs when
Pre-Occupancy Survey was submitted to SWBT.

Signed (SWBT Representative): SWBT's Representative signs when Pre-Occupancy
Survey was submitted to SWBT.

<PAGE>   423
[LOGO]
SOUTHWESTERN BELL                                                       SW-9436A
TELEPHONE                                                            (Rev. 5-89)
                                                             Ref:  002-011-900SW

                    NOTIFICATION OF SURRENDER OR MODIFICATION
                     OF POLE ATTACHMENT LICENSE BY LICENSEE

                                                              Page ____ of _____

                                          Agreement Number _____________________

                                           _____________________________________
                                          (Licensee) 
                                           _____________________________________
                                          (Address)
                                           _____________________________________


SOUTHWESTERN BELL TELEPHONE COMPANY:

In accordance with the terms and conditions of the License Agreement between us,
dated ________, 19__, notice is hereby given that the licenses covering
attachments to the following poles and/or anchors and/or utilization of
anchor/guy strand is surrendered (or modified as indicated in Licensee's prior
notification to Licensor, dated ___________________, 19___,) effective
_______________________.
        
       
<TABLE>
<CAPTION>
                                                                                                                         DATE FAC.
                               ANCHOR A/GS                                                                               RMVD. OR
        POLE NO.            (ASSOC. POLE NO.)        LIC. NO. & DATE          SURRENDEER OR MODIFICATION                 MODIFIED
<S>                        <C>                      <C>                      <C>                                        <C>
 1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15

Date Notification Received _____________________
                                                                              _____________________________________________________
Date Modification Accepted _____________________                                                    Name of Licensee
By _____________________________________________
Discontinued:                                                                 By   ________________________________________________
                           Poles _______________                              Title _______________________________________________
                  Anchors_______________________
         Anchor/Guy Strands_____________________

</TABLE>
REF: SW002-011-900                                                     
                                                                     


<PAGE>   424
[LOGO]
SOUTHWESTERN BELL
Telephone

                                       NOTIFICATION OF SURRENDER OR MODIFICATION
                                       OF CONDUIT OCCUPANCY LICENSE BY APPLICANT

                                                              Page ____ of _____

License Agreement #
                                       _________________________________________
                                      (Applicant)
                                       _________________________________________
                                      (Address)
                                       _________________________________________


SOUTHWESTERN BELL TELEPHONE COMPANY:

In accordance with the terms and conditions of the Licensing Agreement between
us, dated ________, 19__, notice is hereby given that the licenses covering
occupancy of the following conduit are surrendered (or modified as indicated in
Applicant's prior notification to SWBT, dated ___________________, 19___,)
effective _________.
        
<TABLE>
<CAPTION>                                                                                                            DATE
                                                                                                                 FAC. RMVD. OR
        CONDUIT LOCATION                 LIC. NO. & DATE                SURRENDER OR MODIFICATION                 MODIFIED
<S>                                    <C>                            <C>                                   <C> 
 1
 2
 3
 4
 5
 6
 7
 8
 9 
10
11
12
13
14
15

                 Date Notification Received _____________________                      ______________________________________
       S         Date Modification Accepted _____________________                                (Applicant)
       W         By _____________________________________________
       B         Discontinued: __________________________________                     By  ___________________________________
       T                                                                                     (Name of Authorized Agent)

                                   Total duct footage ___________                       Title  _____________________________
                                                                                             (Title of Authorized Agent)
</TABLE>

Ref: SW002-011-900SW                                                   SW-9436B
                                                                     (Rev. 6-96)
<PAGE>   425
[LOGO]
SOUTHWESTERN BELL
Telephone

                                                    NOTIFICATION OF UNAUTHORIZED
                                                        ATTACHMENTS BY APPLICANT

Applicant Name ________________________________

In accordance with the terms and conditions of the License Agreement between us,
dated _____, 19__, notice is hereby given that the license covering 
attachments to the following is unauthorized (as indicated in Applicant's prior
agreement to SWBT, dated ______________________, 19___,) effective
____________________.
        
        
                                                     SOUTHWESTERN BELL TELEPHONE

                                                     By: _______________________

                                                     Title: ____________________

<TABLE>
<CAPTION>
      
   POLE NO.          LOCATION                                                        DATE FAC.
     OR          (ASSOC. POLE NO.)                                                   RMVD. OR
   CONDUIT #      MANHOLES involved   LIC. NO. & DATE    UNAUTHORIZED ATTACHMENT     MODIFIED
<S>              <C>                 <C>                <C>                         <C>
 1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15

                                               _________________________________                      
SKETCH OF                                               NAME OF APPLICANT
UNAUTHORIZED
ATTACHMENTS      / /                           BY  _____________________________
ATTACHED

DATE NOTIFICATION                              TITLE  __________________________
SENT ____________________
</TABLE>

REF: SW002-011-900                                                     SW-9436C
                                                                     (Rev. 6-96)

<PAGE>   426
                                                Agreement No. _________________

                                   APPENDIX IV
                INSURANCE REQUIREMENTS (MISSOURI) -- PAGE 1 OF 4


         This Appendix IV is an integral part of the Master Agreement for Access
to Poles, Ducts, Conduits, and Rights-of-Way to which it is attached.

         l) Premises. As used in this Appendix, the term "premises" refers to
any site located on, within, or in the vicinity of SWBT's poles, ducts,
conduits, or rights-of-way and any location where Applicant or any person acting
on Applicant's behalf may be physically present while traveling to or departing
from any such site.

         2) Requirements Applicable to Applicant and All Persons and Entities
Acting on Applicant's Behalf. Applicant shall maintain, at all times during the
term of this Master Agreement, all insurance and coverages set forth below. Such
insurance and coverages shall not only cover Applicant but all contractors,
subcontractors, and other persons or entities acting on Applicant's behalf at
the premises described in 1) above. Applicant should require that all
contractors, subcontractors, and other persons or entities acting on Applicant's
behalf at premises described in 1) above obtain the same insurance and
coverages.

         3) Workers' Compensation Insurance. Applicant shall maintain, at all
times during the term of this Agreement, Workers' Compensation Insurance and
Employer's Liability Insurance with minimum limits of $100,000 for bodily
injury-each accident, $100,000 for bodily injury by disease-each employee, and
$500,000 for bodily injury by disease-policy limits, for all employees
performing work or otherwise present on the premises described in 1) above. Such
insurance must comply with the Workers' Compensation laws of this State and
shall provide coverage, at a minimum, for all benefits required by such Worker's
Compensation laws. Applicant shall require any contractor, subcontractor, or
other person or entity acting on Applicant's behalf to provide Workers'
Compensation Insurance and Employer's Liability Insurance for their respective
employees unless such employees are covered by the protection afforded by
Applicant.

         4) General Liability Insurance. To protect SWBT and any joint user from
any liability for bodily injury or property damage, Applicant shall maintain, at
all times during the term of this Agreement, General Liability insurance
satisfactory to SWBT. SWBT shall be added as an additional insured in the
standard policy or an endorsement thereto. Applicant shall also require any
contractor, subcontractor, or other person or entity acting on Applicant's
behalf to provide General Liability coverage with the same limits and with SWBT
added as an additional insured unless such contractor, subcontractor, or other
person or entity is covered by the General Liability protection afforded by
Applicant.


                       a)  The following coverages must be included in (and may
                           not be excluded from) the policy or policies obtained
                           to satisfy the General Liability insurance
                           requirements of Applicant and any contractor,
                           subcontractor, or other person or entity acting on
                           Applicant's behalf. The coverages may be provided by
                           the 


<PAGE>   427
                                  APPENDIX IV
                INSURANCE REQUIREMENTS (MISSOURI) -- PAGE 2 OF 4

                           standard policy or endorsements thereto.  Exclusion 
                           endorsements deleting these coverages will
                           not be accepted.

                           1) Personal Injury and Advertising Injury coverage.

                           2) Premises/Operations coverage, including also
                              coverage for any newly acquired ownership or 
                              controlled premises or operations.

                           3) Independent Contractors coverage to provide 
                              protection for Applicant's contractors, 
                              subcontractors, and other persons or entities 
                              acting on Applicant's behalf.
                               
                           4) Explosion, Collapse, and Underground Hazard (XCU)
                              coverage.

                           5) Completed Operations coverage providing for 
                              bodily injury and property damage liabilities  
                              which may occur once the operations have been
                              completed or abandoned.

                           6) Contractual Liability coverage to provide
                              financial responsibility for the Applicant to 
                              meet its indemnification obligations.

                           7) Broad Form Property Damage (BFPD) coverage for 
                              damage to property in the care or custody of 
                              Applicant and damage to work performed by or on
                              behalf of the Applicant.

                        b) Minimum policy limits shall be as follows:

                           General Aggregate Limit:  $1,000,000.

                           Sublimit for all bodily injury, property damages, or 
                           medical expenses incurred in any one occurrence:  
                           $1,000,000.

                           Sublimit for personal injury and advertising:  
                           $1,000,000.

                           Products/Operations Aggregate Limit:  $1,000,000.

                           Each occurrence sublimit for Products/Operations:  
                           $1,000,000.

                        c) No coverage shall be deleted from the standard policy
                           without notification of individual exclusions being 
                           attached for review and acceptance.

<PAGE>   428


                                   APPENDIX IV
                INSURANCE REQUIREMENTS (MISSOURI) -- PAGE 3 OF 4

                

                       d)  Policy language or endorsements adding SWBT as an
                           additional insured shall not include exclusions or
                           exceptions which defeat the purpose of protecting
                           SWBT



<PAGE>   429
                                   APPENDIX IV
                INSURANCE REQUIREMENTS (MISSOURI) -- PAGE 4 OF 4

                  from any liability for bodily injury or property damage 
                  arising out of Applicant's operations.

         5) Automobile Liability insurance. The parties contemplate that
Applicant and personnel acting on Applicant's behalf will utilize automobiles,
trucks, and other motor vehicles on public and private property, including
public rights of way, in the vicinity of SWBT's poles, ducts, conduits, and
rights-of-way. Accordingly, Applicant shall maintain, at all times during the
term of this Agreement, Automobile Liability insurance with minimum limits of
$1,000,000 combined single limits per occurrence for bodily injury and property
damage which may arise out of the operation or use of motor vehicles of any
type. Coverage shall extend to "any auto" -- that is, coverage shall be extended
to all owned, non-owned, and hired vehicles used by Applicant or by any person
or entity acting on Applicant's behalf in connection with any work performed, or
to be performed, on, within, or in the vicinity of SWBT's poles, ducts,
conduits, or rights-of-way.

         6) Layering of General Liability and Automobile Liability coverages.
Applicant's insurance may be written via a primary policy with either an excess
or umbrella form over the primary policy. If coverage is written in this manner,
the total of the combined policy limits must meet or exceed the minimum limits
specified in this Agreement.

         7) Deductibles. No deductibles shall be allowed without the express
written consent of SWBT.

         8) Claims Made Policies. Claims Made Policies will not be accepted.

         9) Proof of Insurance. Certificates of Insurance stating the types of
insurance and policy limits provided the insured, or other proof of insurance
satisfactory to SWBT, must be received by SWBT prior to the issuance of any
licenses pursuant to this Agreement and before Applicant or any person acting on
Applicant's behalf performs any work on the premises described in 1) above.

                  a)       Certificates of Insurance using the insurance 
                           industry standard ACORD form are preferred.

                  b)       Certificates provided with respect to General
                           Liability policies and certificates provided with
                           respect to Automobile Liability policies shall
                           indicate SWBT as an Additional Insured.

                  c)       Deductibles, if permitted, shall be listed on the
                           Certificate of Insurance.

                  d)       The cancellation clause on the certificate of 
                           insurance shall be amended to read 

<PAGE>   430

                                   APPENDIX IV
                 INSURANCE REQUIREMENTS (MISSOURI)--PAGE 5 OF 4

                           as follows:

                                   "SHOULD ANY OF THE ABOVE DESCRIBED POLICIES
                                   BE CANCELLED OR MATERIALLY CHANGED BEFORE THE
                                   EXPIRATION DATE, THE ISSUING COMPANY WILL
                                   MAIL 30 DAYS WRITTEN NOTICE TO THE
                                   CERTIFICATE HOLDER NAMED TO THE LEFT."

                           A certificate which does not include the phrase "or
                           materially changed" does not meet SWBT's
                           requirements. A certificate reciting that the issuing
                           company will "endeavor to" mail 30 days written
                           notice to the certificate holder does not meet SWBT's
                           requirements. The language "but failure to mail such
                           notice shall impose no obligation or liability of any
                           kind upon the company, its agents, or
                           representatives" or similar language must be deleted
                           from the certificate.

                  e)       The certificate holder shall be:

                           Southwestern Bell Telephone Company
                           12930 Olive Street Road, Floor 2
                           Creve Couer, Missouri 63141
                                    ATTENTION:  Utility Liaison Supervisor

                  f)       Failure to object to any coverage described in a
                           certificate shall not constitute written permission
                           from SWBT to any variance from or alteration of any
                           requirement set forth in this Appendix and shall not
                           be construed as a waiver by SWBT of any rights under
                           this Agreement.

         10) Rating of Insurers. SWBT requires that companies affording
insurance coverage have a B+VII or better rating, as rated in the current A.M.
Best Key Rating Guide for Property and Casualty Insurance Companies.

         11) Self-insurance. If authorized in the Master Agreement,
self-insurance shall be allowed in lieu of the above requirements upon
Applicant's submission of proof that it has met the self-insurance requirements
stated in the Master Agreement.

<PAGE>   431
                                            Agreement No. ______________________



                                   APPENDIX V
                NONDISCLOSURE AGREEMENT (MISSOURI) -- PAGE 1 OF 4

         Nondisclosure Agreement (SWBT Pole, Duct, Conduit, and Right-of-Way)

         This Nondisclosure Agreement, effective as of the ____ day of
_______________, 19___, has been entered into by and between Southwestern Bell
Telephone Company ("SWBT"), a Missouri corporation, and the undersigned person
or firm ("Recipient") as a condition of access to certain records and
information maintained by SWBT. The parties stipulate and agree as follows:

         1) SWBT maintains records and information, including but not limited to
outside plant engineering and construction records, which relate to poles,
ducts, conduits, and rights-of-way which SWBT owns or controls. SWBT represents
that such records and information are not made generally available for
inspection or copying by the public and include business, economic, and
engineering information (including but not limited to plans, designs, maps,
diagrams, cable counts and cable-specific information, circuit records, and
other competitively sensitive information) which SWBT intends to keep secret and
which has economic value by virtue of not being generally known to or readily
ascertainable by the public, including SWBT's competitors.

         2) SWBT has agreed to make certain of its records and information
relating to poles, ducts, conduits, and rights-of-way available to cable
television systems and telecommunications carriers who are presently entitled
under federal law to have access to the poles, ducts, conduits, and
rights-of-way owned or controlled by SWBT.

         3) Recipient represents that Recipient is a cable television system or
telecommunications carrier entitled under federal law to access to poles, ducts,
conduits, and rights-of-way owned or controlled by SWBT, or, if an individual,
that he or she is acting on behalf of _______________________________________,
which is such a cable television system or telecommunications carrier. 
Recipient further represents that Recipient is seeking access to SWBT's records 
and information relating to poles, ducts, conduits, and rights-of-way for the 
limited purpose of enabling engineering and construction personnel employed by
or acting on behalf of such cable television system or telecommunications 
carrier to make engineering and construction decisions necessary to utilize 
SWBT's poles, ducts, conduits, and rights-of-way.

         4) SWBT agrees that permitted uses of records and information
concerning SWBT's poles, ducts, conduits, and rights-of-way are (a) determining
which poles, ducts, conduits, and rights-of-way owned or controlled by SWBT are
available for use by such cable television systems or telecommunications
carriers as permitted by federal law, (b) designing, engineering, constructing,
installing, maintaining, and removing equipment which is to be attached to or
placed within such poles, ducts, conduits, and rights-of-way, and (c) contesting
decisions, if any, by SWBT not to provide access to such poles, ducts, conduits,
and rights-of-


<PAGE>   432
                                   APPENDIX V
                NONDISCLOSURE AGREEMENT (MISSOURI) -- PAGE 2 OF 4

way as requested.  No other uses of such records or information are authorized 
or permitted under this Agreement.

         5) Recipient agrees that Recipient will not use, or permit any other
person or entity to use or have access to SWBT's records and information
relating to poles, ducts, conduits, or rights-of-way or information for any
purpose other than the limited purposes stated in 4) above and that such records
and information shall not be disclosed or shared with any person or persons
other than those who have a need to know such information for such limited
purposes. Recipient specifically agrees that such records and information shall
not be used or accessed by any person involved in sales, marketing, competitive
intelligence, competitive analysis, strategic planning, and similar activities.
Recipient further agrees that Recipient shall not furnish copies of such records
or disclose information contained in such records to any person or entity which
has not executed and delivered to SWBT a counterpart of this Agreement prior to
receipt of such copies or information.

         6) Recipient agrees that Recipient will not without SWBT's express
written authorization copy, duplicate, sketch, draw, photograph, download,
photocopy, scan, replicate, transmit, deliver, send, mail, communicate, or
convey any of SWBT's records relating to poles, ducts, conduits, or
rights-of-way. Recipient further agrees that Recipient will not conceal, alter,
or destroy any SWBT records furnished to Recipient pursuant to this Agreement.

         7) Notwithstanding the provisions of 6) above, and except as provided
in 8) below, Recipient may copy, take notes from, make, and use (for the limited
purposes specified herein) drawings with reference to the following records
provided by SWBT to Recipient for inspection: pole and conduit route maps, cable
plat maps, and plant location records reflecting approximate locations of SWBT's
existing poles, ducts, conduits, and rights-of-way. All such copies, notes, and
drawings (whether in hardcopy or electronic form) shall be marked with the
legend: "PROPRIETARY INFORMATION: NOT FOR USE BY OR DISCLOSURE TO ANY PERSON WHO
HAS NOT EXECUTED A NONDISCLOSURE AGREEMENT (SWBT POLE, DUCT, CONDUIT, AND
RIGHT-OF-WAY)."

         8) No references to cable counts, cable designations or cable-specific
information, circuit information, or customer-specific information of any kind
may be included in any copies, notes, or drawings made pursuant to 7) above;
provided, however, that Recipient may make estimates regarding the physical
characteristics (such as size and weight) of the cables being surveyed when
necessary to make engineering determinations regarding the capacity, safety,
reliability, or suitability of SWBT's poles, ducts, conduits, or rights-of-way
for Recipient/Applicant's intended uses.
<PAGE>   433

                  9) All records and information relating to poles, ducts,
conduits, and rights-of-way provided to Recipient/Applicant by SWBT (whether in
writing, orally, or in electronic or other formats) shall be deemed to be
proprietary information subject to this Agreement without regard to whether such
information, at the time of disclosure, has been marked with restrictive
notations such as "Proprietary," "Restricted Proprietary," "Confidential," "Not
to Be Copied or Reproduced," or the like.

                           10) This Agreement applies only to records and
information provided to Recipient by SWBT and does not apply to records and
information obtained by Recipient from other lawful sources.

                           11) This Agreement does not prohibit the disclosure
of records or information in response to subpoenas and/or orders of a
governmental agency or court of competent jurisdiction. In the event Recipient
receives an agency or court subpoena requiring such disclosure, Recipient shall
immediately, and in no event later than five calendar days after receipt, notify
SWBT in writing.

                           12) The Parties agree that, in the event of a breach
or threatened breach of this Agreement, SWBT may seek any and all relief
available in law or in equity as a remedy for such breach, including but not
limited to monetary damages, specific performance, and injunctive relief. The
Parties acknowledge that SWBT's records and information relating to poles,
ducts, conduits, and rights-of-way include valuable and unique information and
that disclosure of such information (including circuit information) will result
in irreparable injury to SWBT. In the event of any breach of this Agreement for
which legal or equitable relief is sought, SWBT shall be entitled to recover
from Recipient all reasonable attorney's fees and other reasonable costs
(including but not limited to fees of expert witnesses) incurred by SWBT in
connection with the prosecution of its claims against Recipient.

                           13) This Agreement shall be effective on the
effective date shown above and shall remain in full force and effect until
terminated by either party as provided herein. Either party may, at any time,
with or without cause, terminate this Agreement by giving the other party 60
days' advance written notice of its decision to terminate. The parties further
agree that termination of this Agreement shall have no effect on the duty of any
person or entity, including Recipient, to abide by all terms of this Agreement
with respect to records and information received by Recipient while this
Agreement is in effect.

                           14) This Agreement shall benefit and be binding on
the parties below and their respective heirs, successors, and assigns.

                           15) This Agreement will be governed by the laws of
the State of Missouri.
<PAGE>   434
                                  APPENDIX V
                NONDISCLOSURE AGREEMENT (MISSOURI) -- PAGE 4 OF 4

         16) This Agreement sets forth the entire agreement and understanding
between the parties with respect to the subject matter hereof, and none of the
terms of this Agreement may be amended or modified except by written instrument
signed by both parties.

         IN WITNESS WHEREOF, the parties hereto have executed this Agreement, or
caused this Agreement to be executed by their duly authorized representatives,
in duplicate, as of the dates set forth below.

___________________________________          Southwestern Bell Telephone Company
Recipient  (Print or Type Name)


By ________________________________          By _______________________________
       Signature of Recipient                   Signature
           or Representative      

___________________________________          ___________________________________
Name  (Printed or Typed)                     Name  (Printed or Typed)

___________________________________          ___________________________________
Address                                      Address

___________________________________          ___________________________________
City, State and Zip Code                     City, State and Zip Code

___________________________________          ___________________________________
Phone                                        Phone

___________________________________          ___________________________________
Date                                         Date


<PAGE>   435
                                        Agreement No. __________________________


                                   APPENDIX VI
                         NOTICES TO APPLICANT (MISSOURI)

         This Appendix is an integral part of the Master Agreement for Access to
Poles, Ducts, Conduits, and Rights-of-Way to which it is attached.

         Notices in general. Except as otherwise stated in this Appendix, all
notices to Applicant shall be given to Applicant's duly authorized agent or
attorney as specified in Section 29.01 of the Master Agreement.

         Changes in notice requirements. Changes in the notice requirements set
forth in this Appendix may be made by Applicant from time to time in accordance
with the provisions of Section 29.03 of the Master Agreement.

         Special notice provisions. The following special notice provisions, if
any, shall apply:



<PAGE>   436
                                            Agreement No. ______________________



                                  APPENDIX VII
                    NOTICES TO SWBT (MISSOURI) -- PAGE 1 OF 3

         This Appendix is an integral part of the Master Agreement for Access to
Poles, Ducts, Conduits, and Rights-of-Way to which it is attached.

         Utility Liaison Supervisor (ULS). Except as otherwise stated in this
Appendix, all notices to SWBT shall be given to the Utility Liaison Supervisor
(ULS) designated in APPENDIX VIII of the Master Agreement. The Utility Liaison
Supervisor is generally responsible for coordinating applications for access to
SWBT's poles, ducts, conduits, and rights-of-way and serving as Applicant's
initial point of contact for matters arising out of or in connection with the
administration of the Master Agreement. Notices to the ULS shall be given in
writing in the manner prescribed in Section 29.02. Notices to be sent to the ULS
include, but are not limited to, notices under the following provisions of the
Master Agreement.

         7.01      Notification of Designation of Primary Point of Contact

         7.03(a)   Notification of intent to review records

         8.XX      All Notifications in Article 8

         9.XX      All Notifications in Article 9

         10.04(e)  Notification Regarding Make-Ready Work

         12.03(d)  Notification of placing J-hook on non-licensed pole

         12.04     Notification of occupation of maintenance duct for 
                   short-term use

         12.06     Notification of Applicant's maintenance contact

         13.01     Notification of planned modifications

         14.02(c)  Notification of Applicant's desire to add to or modify its 
                   existing attachment

         15.02(b)  Notification of occupation of maintenance duct for
                   short-term emergency use

         15.03     Notification of emergency repair coordinators

         16.01     Notification that facilities have been brought into 
                   compliance

         17.02(c)  Disclaimer of ownership or responsibility for untagged
                   facilities 
<PAGE>   437
                                  APPENDIX VII
                    NOTICES TO SWBT (MISSOURI) -- PAGE 2 OF 3

         17.06     Notification of Applicant's response to ownership of
                   facilities in question

         18.01(a)  Notice of intent to remove facilities

         18.01(e)  Notice of intent to terminate license

         18.06     Notification of completion of removal of facilities

         20.01(c)  Notification of change of bond

         21.17     Notification of claims

         23.XX     All notifications of insurance coverage in Article 23

         24.03     Notification of assignment

         25.01     Notification of termination

         25.03     Notification of cure of breach

         27.04     Notice of elective termination

         29.03     Notification of change in notice requirements

         Other notices. The following notices may be given orally or in writing
(including fax) and shall be given to SWBT's Local Service Provider Center
(LSPC) at 1-800-486-5598 instead of the ULS.

         6.05(a)   Notifications relating to electrical interference

         6.09(d)   Notifications of unsafe conditions

         6.11(a)   Notification of manhole entry

         6.13(c)   Notification of environmental contaminants

         10.02(b)  Notification of materials required for self-provisioning of 
                   inner duct

         15.04     Notification of conditions requiring emergency repair


<PAGE>   438

                                  APPENDIX VII
                    NOTICES TO SWBT (MISSOURI) -- PAGE 3 OF 3

         15.06(a)  Notification of performing corrective work on emergency 
                   repair. (advanced notice)


<PAGE>   1
                                                                  EXHIBIT 10.20


                                      INDEX


SWBT/Digital Teleport, Inc. (Arkansas)                                 Tab 1
         800                                                           Tab 2
         911                                                           Tab 3
         AIN                                                           Tab 4
         BCR                                                           Tab 5
         CH                                                            Tab 6
         CNAM                                                          Tab 7
         DCO                                                           Tab 8
         DA                                                            Tab 9
         FGA                                                           Tab 10
         HOST                                                          Tab 11
         ITR                                                           Tab 12
         LIDB-AS                                                       Tab 13
         LIDB-V                                                        Tab 14
         MAP                                                           Tab 15
         OSS                                                           Tab 16
         OS                                                            Tab 17
         NIM/Physical Collocation Agreement                            Tab 18
         SS7                                                           Tab 19
         RECORDING                                                     Tab 20
         RESALE                                                        Tab 21
         UNE                                                           Tab 22
         WIRELESS                                                      Tab 23
         WP                                                            Tab 24
         TP                                                            Tab 25
         PORT                                                          Tab 26
         Poles, Ducts, Conduits & ROW                                  Tab 27





<PAGE>   2

                                                    GENERAL TERMS AND CONDITIONS
                                                                    DTI-ARKANSAS








             INTERCONNECTION AGREEMENT UNDER SECTIONS 251 AND 252 OF
                       THE TELECOMMUNICATIONS ACT OF 1996




                                 BY AND BETWEEN


                       SOUTHWESTERN BELL TELEPHONE COMPANY


                                       AND


                             DIGITAL TELEPORT, INC.

<PAGE>   3


                                                   GENERAL TERMS AND CONDITIONS
                                                                 DTI - ARKANSAS
                                                                    PAGE 1 OF 3


                                TABLE OF CONTENTS
<TABLE>
<CAPTION>

<S>     <C>                                                                                                              <C>
1.0      DEFINITIONS......................................................................................................1

2.0      INTERPRETATION AND CONSTRUCTION..................................................................................5

3.0      IMPLEMENTATION SCHEDULE AND INTERCONNECTION ACTIVATION DATES.....................................................5

4.0      INTERCONNECTION PURSUANT TO SECTION 251(c)(2)....................................................................6
         4.1      Scope...................................................................................................6
         4.2      Interconnection Coverage................................................................................6
         4.3      Methods for Interconnection.............................................................................7
         4.4      Physical Architecture...................................................................................8
         4.5      Technical Specifications................................................................................9
         4.6      Interconnection in Additional Metropolitan Exchange Areas...............................................9

5.0      TRANSMISSION AND ROUTING OF TELEPHONE EXCHANGE SERVICE TRAFFIC PURSUANT TO SECTION 251(c)(2)...................10
         5.1      Scope of Traffic.......................................................................................10
         5.2      Responsibilities of the Parties........................................................................10
         5.3      Reciprocal Compensation for Termination of Local Traffic...............................................11
         5.4      Reciprocal Compensation for Transit Traffic............................................................12
         5.5      Reciprocal Compensation for Termination of IntraLATA Interexchange Traffic.............................13
         5.6      Compensation for Origination and Termination of Switched Access Service Traffic
                  to or From an IXC (Meet-Point Billing (MPB) Arrangements)..............................................13
         5.7      Billing Arrangements for Compensation for Termination of IntraLATA, Local, Transit, and Optional
                  Calling Area Traffic...................................................................................15
         5.8      Compensation for "Porting" Optional Calling Area Numbers...............................................16

6.0      TRANSMISSION AND ROUTING OF EXCHANGE ACCESS TRAFFIC PURSUANT
         TO 251(c)(2)....................................................................................................16
         6.1      Scope of Traffic.......................................................................................16
         6.2      Trunk Group Architecture Traffic Routing...............................................................16

7.0      TRANSPORT AND TERMINATION OF OTHER TYPES OF TRAFFIC.............................................................17
         7.1      Information Services Traffic...........................................................................17
         7.2      Line Status Verification (LSV)/Busy Line Interrupt (BLI) Traffic.......................................17
         7.3      Wireless Traffic.......................................................................................17

8.0      SIGNALING.......................................................................................................18

9.0      NUMBERING.......................................................................................................18

10.0     RESALE -- SECTIONS 251(b)(1); 251(c)(4); 252(d)(3); and 271(c)(2)(B)(xiv).......................................19
</TABLE>


<PAGE>   4
                                                   GENERAL TERMS AND CONDITIONS
                                                                 DTI - ARKANSAS
                                                                    PAGE 2 OF 3


<TABLE>
<CAPTION>


<S>    <C>                                                                                                              <C>
11.0     UNBUNDLED NETWORK ELEMENTS - SECTIONS 251(c)(3), 271(c)(2)(B) (ii),(iv),(v),(vi),(x)............................20

12.0     NOTICE OF CHANGES -- SECTION 251(c)(5)..........................................................................20

13.0     COLLOCATION -- SECTION 251(c)(6)................................................................................20

14.0     NUMBER PORTABILITY -- SECTIONS 251(b)(2)and 271(c)(2)(B)(xi)....................................................21

15.0     DIALING PARITY -- SECTION 251(b)(3); 271(c)(2)(B)(xii); and 271(e)(2)...........................................21

16.0     ACCESS TO RIGHTS-OF-WAY -- SECTION 251(b)(4) and 271(c)(2)(B)(iii)..............................................21

17.0     DATABASE ACCESS -- SECTION  271(c)(2)(B)(x).....................................................................21

18.0     INTERCEPT REFERRAL ANNOUNCEMENTS................................................................................21

19.0     COORDINATED REPAIR CALLS........................................................................................22

20.0              OTHER SERVICES 271(c)(B)(2)(vii) and 271(c)(2)(B)(viii)................................................22
         20.1     White Pages............................................................................................22
         20.2     Calling Name Information...............................................................................22
         20.3     Billing/Collecting/Remitting  .........................................................................23
         20.4     911/E911 Service  .....................................................................................23
         20.5     Directory Assistance (DA)..............................................................................23
         20.6     Operator Services......................................................................................23
         20.7     Clearinghouse Services ................................................................................23
         20.8     Hosting................................................................................................23
         20.9     Signaling System 7 Interconnection.....................................................................23

21.0     GENERAL RESPONSIBILITIES OF THE PARTIES.........................................................................23

22.0     EFFECTIVE DATE, TERM, AND TERMINATION...........................................................................25

23.0     DISCLAIMER OF REPRESENTATIONS AND WARRANTIES....................................................................26

24.0     CHANGES IN END USER LOCAL EXCHANGE SERVICE PROVIDER SELECTION...................................................26

25.0     SEVERABILITY....................................................................................................27

26.0     INTELLECTUAL PROPERTY...........................................................................................27

27.0     INDEMNIFICATION.................................................................................................27
</TABLE>


<PAGE>   5

                                                   GENERAL TERMS AND CONDITIONS
                                                                 DTI - ARKANSAS
                                                                    PAGE 3 OF 3



<TABLE>
<CAPTION>

<S>     <C>                                                                                                             <C>
28.0     LIMITATION OF LIABILITY.........................................................................................28

29.0     LIQUIDATED DAMAGES FOR SPECIFIED ACTIVITIES.....................................................................29
         29.1     Certain Definitions....................................................................................29
         29.2     Specified Performance Breach...........................................................................30
         29.3     Liquidated Damages.....................................................................................30
         29.4     Limitations............................................................................................31
         29.5     Sole Remedy............................................................................................31
         29.6     Records................................................................................................31

30.0     REGULATORY APPROVAL.............................................................................................31

31.0     MISCELLANEOUS...................................................................................................32
         31.1     Authorization..........................................................................................32
         31.2     Compliance and Certification...........................................................................32
         31.3     Law Enforcement........................................................................................32
         31.4     Independent Contractor.................................................................................33
         31.5     Force Majeure..........................................................................................33
         31.6     Confidentiality........................................................................................33
         31.7     Governing Law..........................................................................................35
         31.8     Taxes..................................................................................................36
         31.9     Non-Assignment.........................................................................................37
         31.10    Non-Waiver.............................................................................................37
         31.11    Audits.................................................................................................37
         31.12    Disputed Amounts.......................................................................................38
         31.13    Disputed Resolutions...................................................................................38
         31.14    Notices................................................................................................39
         31.15    Publicity and Use of Trademarks or Service Marks.......................................................39
         31.16    Section 252(i) Obligations.............................................................................40
         31.17    Joint Work Product.....................................................................................40
         31.18    Intervening Law........................................................................................40
         31.19    No Third Party Beneficiaries; Disclaimer of Agency.....................................................41
         31.20    No License.............................................................................................41
         31.21    Survival...............................................................................................41
         31.23    Scope of Agreement.....................................................................................41
         31.24    Entire Agreement.......................................................................................41
</TABLE>


<PAGE>   6

                                                   GENERAL TERMS AND CONDITIONS
                                                                 DTI - ARKANSAS
                                                                    PAGE 1 OF 42






           INTERCONNECTION AGREEMENT UNDER SECTIONS 251 AND 252 OF THE
                         TELECOMMUNICATIONS ACT OF 1996

         This Interconnection Agreement under Sections 251 and 252 of the
Telecommunications Act of 1996 ("Agreement"), is by and between Southwestern
Bell Telephone Company, a Missouri Corporation ("SWBT"), and Digital Teleport,
Inc. ("DTI").

         WHEREAS, the Parties want to interconnect their networks at mutually
agreed upon points of interconnection to provide, directly or indirectly,
Telephone Exchange Services and Exchange Access to residential and business end
users predominantly over their respective telephone exchange service facilities
in Arkansas; and

         WHEREAS, the Parties are entering into this Agreement to set forth the
respective obligations of the Parties and the terms and conditions under which
the Parties will interconnect their networks and provide other services as
required by the Telecommunications Act of 1996 ("the Act") and additional
services as set forth herein; and

         WHEREAS, for purposes of this Agreement, the Parties intend to operate
where SWBT is the incumbent local exchange carrier and DTI, a competitive local
exchange carrier, is certified by the Arkansas Public Service Commission, as
required.

         NOW, THEREFORE, DTI and SWBT hereby agree as follows:

1.0      DEFINITIONS

         1.1 "Act" means the Communications Act of 1934 [47 U.S.C. 153(R)], as
amended by the Telecommunications Act of 1996.

         1.2 "Affiliate" is as defined in the Act.

         1.3 "Automatic Number Identification" or "ANI" is a switching system
feature that forwards the telephone number of the calling party and is used for
screening, routing and billing purposes.

         1.4 "Busy Line Interrupt" or "BLI" is performed when one Party's
operator bureau interrupts a telephone number in progress after Line Status
Verification has occurred. The operator bureau will interrupt the busy line and
inform the called party that there is a call waiting.

         1.5 "Calling Party Number" or "CPN" is a feature of signaling system 7
(SS7) protocol whereby the ten (10) digit number of the calling party is
forwarded from the end office.

         1.6 "Central Office Switch" means a single switching system within the
public switched telecommunications network, including the following:


<PAGE>   7


                                                   GENERAL TERMS AND CONDITIONS
                                                                 DTI - ARKANSAS
                                                                   PAGE 2 OF 42




                           (i) "End Office Switches" which are Class 5 switches
                           where end user Exchange Services are directly
                           connected and offered; and

                           (ii) "Tandem Office Switches" or "Tandems" which are
                           Class 4 switches used to connect and switch trunk
                           circuits between Central Office Switches.

Central Office Switches may be employed as combination End Office/Tandem Office
switches (combination Class 5/Class 4).

         1.7 "CLASS Features" mean certain CCS-based features available to end
users including, but not limited to: Automatic Call Back; Call Trace; Caller
Identification and related blocking features; Distinctive Ringing/Call Waiting;
Selective Call Forward; and Selective Call Rejection.

         1.8 "Collocation" means an arrangement whereby one Party's (the
"Collocating Party") facilities are terminated in its equipment necessary for
Interconnection or for access to Network Elements on an unbundled basis which
has been installed and maintained at the premises of a second Party (the
"Housing Party"). Collocation may be "physical" or "virtual." In "Physical
Collocation," the Collocating Party installs and maintains its own equipment in
the Housing Party's premises. In "Virtual Collocation," the Housing Party
installs and maintains the collocated equipment in the Housing Party's premises.
Collocation includes, but is not limited to, collocation of 38 GHz basic
transmission equipment, provided it complies with the guidelines in SWBT's
current Physical Collocation 02/14/97 Technical Publication provided to DTI.

         1.9 "Commission" means the Arkansas Public Service Commission.

         1.10 "Common Channel Signaling" or "CCS" is a special network,
fully separate from the transmission path of the public switched network, that
digitally transmits call set-up and network control data. Unless otherwise
agreed by the Parties, the CCS used by the Parties shall be SS7.

         1.11 "Cross Connect" means the unbundled network element cross
connect rate element which is used to designate connection between: i) the SWBT
distribution frame and an unbundled network element component, or ii) two
unbundled network element components, or iii) the SWBT distribution frame and
the tie cable termination point for DTI collocation.

         1.12 "Dialing Parity" is as defined in the Act. As used in this
Agreement, Dialing Parity refers to both Local Dialing Parity and Toll Dialing
Parity.

         1.13 "Digital Signal Level" means one of several transmission rates in
the time-division multiplex hierarchy.



<PAGE>   8
                                                   GENERAL TERMS AND CONDITIONS
                                                                 DTI - ARKANSAS
                                                                   PAGE 3 OF 42

         1.14 "Digital Signal Level 0" or "DS0" means the 64 Kbps zero-level
signal in the time-division multiplex hierarchy.

         1.15 "Digital Signal Level 1" or "DS1" means the 1.544 Mbps first-level
signal in the time-division multiplex hierarchy. In the time-division
multiplexing hierarchy of the telephone network, DS1 is the initial level of
multiplexing.

         1.16 "Digital Signal Level 3" or "DS3" means the 44.736 Mbps
third-level in the time-division multiplex hierarchy. In the time-division
multiplexing hierarchy of the telephone network, DS3 is defined as the third
level of multiplexing.

         1.17 "End User" means a third-party residence or business, that
subscribes to Telecommunications Services provided by either of the Parties, or
by another telecommunications service provider.

         1.18 "Exchange Access" is as defined in the Act.

         1.19 "Exchange Message Record" or "EMR" means the standard used for
exchange of Telecommunications message information among Telecommunications
Carriers for billable, non-billable, sample, settlement and study data. EMR
format is contained in Bellcore Practice BR-010-200-010 CRIS Exchange Message
Record.

         1.20 "Fiber-Meet" means an Interconnection architecture method
whereby the Parties physically interconnect their networks via an optical fiber
interface (as opposed to an electrical interface) at a mutually agreed upon
location.

         1.21 "Interconnection" is as Described in the Act and refers to the
connection of separate pieces of equipment, facilities, or platforms between or
within networks for the purpose of transmission and routing of Telephone
Exchange Service traffic and Exchange Access traffic.

         1.22 "Interconnection Activation Date" is the date that the
construction of the joint facility Interconnection arrangement has been
completed, trunk groups have been established, and joint trunk testing is
completed.

         1.23 "Interexchange Carrier" or "IXC" means a carrier that provides,
directly or indirectly, interLATA or intraLATA Telephone Toll Services. For
purposes of Section 6.0 of this Agreement, the term "IXC" includes any entity
which purchases FGB or FGD Switched Exchange Access Service in order to
originate or terminate traffic to/from DTI's end users.

         1.24 "IntraLATA Toll Traffic" means those intraLATA station calls that
are not defined as Local Traffic in this Agreement.




<PAGE>   9


                                                   GENERAL TERMS AND CONDITIONS
                                                                 DTI - ARKANSAS
                                                                   PAGE 4 OF 42

         1.25 "Line Status Verification" or "LSV" or "Busy Line Verify" or "BLV"
is performed when one Party's end user requests assistance from the operator
bureau to determine if the called line of the other Party is in use.

         1.26 "Local Traffic," for purposes of intercompany compensation, is if
(i) the call originates and terminates in the same SWBT exchange area; or (ii)
originates and terminates within different SWBT Exchanges that share a common
mandatory local calling area, e.g., mandatory Extended Area Service (EAS),
mandatory Extended Local Calling Service (ELCS), or other like types of
mandatory expanded local calling scopes.

         1.27 "Losses" means any and all losses, costs (including court costs),
claims, damages (including fines, penalties, and criminal or civil judgments and
settlements), injuries, liabilities and expenses (including attorneys' fees).

         1.28 "MECAB" refers to the Multiple Exchange Carrier Access Billing
(MECAB) document prepared by the Billing Committee of the Ordering and Billing
Forum (OBF), which functions under the auspices of the Carrier Liaison Committee
(CLC) of the Alliance for Telecommunications Industry Solutions (ATIS). The
MECAB document, published by Bellcore as Special Report SR-BDS-000983, contains
the recommended guidelines for the billing of access services provided to an IXC
by two or more LECs, or by one LEC in two or more states within a single LATA.
The latest release is issue No. 5, dated June 1994.

         1.29 "MECOD" refers to the Multiple Exchange Carriers Ordering and
Design (MECOD) Guidelines for Access Services - Industry Support Interface, a
document developed by the Ordering/Provisioning Committee of the Ordering and
Billing Forum (OBF), which functions under the auspices of the Carrier Liaison
Committee (CLC) of the Alliance for Telecommunications Industry" Solutions
(ATIS). The MECOD document, published by Bellcore as Special Report SR
STS-002643, establishes methods for processing orders for access service which
is to be provided to an IXC by two or more telecommunications providers. The
latest release is issue No. 3, dated February 1996.

         1.30 "Meet-Point Billing" or "MPB" refers to a billing arrangement
whereby two or more Telecommunications Carriers jointly provide for switched
access service to an IXC, with each LEC receiving an appropriate share of its
switched access revenues as defined by its effective access tariffs.

         1.31 "Metropolitan Exchange Area" means a geographical area defined in
SWBT current tariffs effective as a metropolitan exchange local calling area.
For example, Dallas, Ft. Worth, Houston, Little Rock, Oklahoma City, St. Louis,
Austin and would be examples of Metropolitan Exchange Areas.

         1.32 "Network Element Bona Fide Request" means the process described
[in Appendix BFR that is attached hereto and incorporated herein] that
prescribes the terms and conditions relating to a Party's request that the other
Party provide a Network Element.


<PAGE>   10

                                                    GENERAL TERMS AND CONDITIONS
                                                                  DTI - ARKANSAS
                                                                    PAGE 5 OF 42


         1.33 "Switched Exchange Access Service" means the offering of
transmission or switching services to Telecommunications Carriers for the
purpose of the origination or termination of Telephone Toll Service. Switched
Exchange Access Services include, but are not necessarily limited to: Feature
Group A, Feature Group B, Feature Group D, 800/888 access, and 900 access and
their successors or similar Switched Exchange Access services.

         1.34 "Telephone Exchange Services"

         1.35  "Synchronous Optical  Network"  or  "SONET"  means  an  optical
interface standard that allows  inter-networking  of transmission  products from
multiple vendors.  The base rate is 51.84 Mbps (OC-1/STS-1) and higher rates are
direct multiples of the base rate, up to 13.22 Gpbs.

         1.36 "Telephone Exchange Service" is as defined in the Act.

         1.37 "Wire  Center" means an occupied  structure or portion  thereof in
which a Party has the exclusive right of occupancy and which serves as a Routing
Point for Switched Exchange Access Service.

2.0      INTERPRETATION AND CONSTRUCTION

         In the event of any amendment of the Act or any legislative,
regulatory, judicial order, rule or regulations, or other legal action that
revises or reverses the Act, the FCC's Orders in FCC Docket Nos. 96-98 and
95-185 or any applicable order or arbitration award purporting to apply the
provisions of the federal Act, the Parties reserve all of their rights and
remedies, including those to amend, alter, or revise this Agreement.

3.0      IMPLEMENTATION SCHEDULE AND INTERCONNECTION ACTIVATION DATES

         Subject to the terms and conditions of this Agreement, Interconnection
of the Parties' facilities and equipment pursuant to Sections 4.0, 5.0 and 6.0
for the transmission and routing of Telephone Exchange Service traffic and
Exchange Access traffic shall be established on or before the corresponding
"Interconnection Activation Date" shown for each such Metropolitan Exchange Area
on Appendix DCO attached hereto and incorporated by reference. Appendix DCO may
be revised and supplemented from time to time upon the mutual agreement of the
Parties to reflect the Interconnection of additional Metropolitan Exchange Areas
pursuant to Section 4.6 by modifying or updating Appendix DCO.


<PAGE>   11


                                                    GENERAL TERMS AND CONDITIONS
                                                                  DTI - ARKANSAS
                                                                    PAGE 6 OF 42



4.0   INTERCONNECTION PURSUANT TO SECTION 251(c)(2)

      4.1 SCOPE

      This Section 4.0 describes the physical architecture for Interconnection 
of the Parties' facilities and equipment for the transmission and routing of 
Telephone Exchange Service traffic and Exchange Access traffic pursuant to 
Section 251(c)(2) of the Act. Such Interconnections shall be equal in quality 
to that provided by the Parties to themselves or to any subsidiary, affiliate 
or Third Party. Appendix ITR attached hereto and incorporated by reference 
prescribes the specific trunk groups (and traffic routing parameters) which 
will be configured over the physical connections described in this Section
4.0 to provide the facilities for the transmission and routing of Telephone
Exchange Service traffic (as described in Section 5.0), Exchange Access traffic
(as described in Section 6.0), LSV/BLI traffic (as described in sub-section
7.2).

      4.2 INTERCONNECTION COVERAGE

      The Parties shall provide for interoperation of their networks and
shall interconnect their facilities as stated below:

      4.2.1 DTI shall interconnect with SWBT's facilities as follows:

                  a.     In each  SWBT  exchange  area in which DTI  chooses  to
                         offer local exchange service,  DTI, at a minimum,  will
                         interconnect  its network  facilities to: (a) each SWBT
                         access  tandem(s),  and (b) to either  each SWBT  local
                         tandem(s) or each SWBT end office(s) ("EO")  subtending
                         that  local  tandem(s).  SWBT EOs and  tandems  through
                         which DTI will  terminate  its  traffic  will be called
                         SWBT Interconnection Wire Centers and are identified in
                         Appendix  DCO.  As  DTI  initiates   Exchange   Service
                         operations in additional SWBT exchange areas,  SWBT and
                         DTI shall agree upon  additional  SWBT  Interconnection
                         Wire Centers in each new exchange area. DTI agrees that
                         if SWBT establishes  additional  tandems in an exchange
                         area within  which DTI offers local  exchange  service,
                         DTI will interconnect to the additional tandems.

                  b.     Interconnection to a SWBT local tandem(s) will provide
                         DTI local access to the SWBT end offices and NXXs which
                         subtend that tandem(s), and to other Local Exchange
                         Carriers ("LECs") (subject to sub-section 5.4) which
                         are connected to that tandem(s). Interconnection to
                         SWBT EO(s) will provide DTI access only to the NXXs
                         served by that individual EO(s) to which DTI
                         interconnects.

                  c.     Interconnection to a SWBT access tandem will provide
                         DTI interexchange access to SWBT, IXCs, LECs and CRMS
                         providers (subject to sub-section 7.3) which are
                         connected to that tandem. Where an access tandem also



<PAGE>   12

                                                    GENERAL TERMS AND CONDITIONS
                                                                  DTI - ARKANSAS
                                                                    PAGE 7 OF 42





                         provides local tandem functions, interconnection to a
                         SWBT access tandem serving that exchange will also
                         provide DTI access to SWBT's EOs with the same
                         functionality described in (b) above.

                  d.     Where DTI requires ancillary services (e.g., Directory
                         Assistance, Operator Assistance, E911/911) additional
                         interconnection to SWBT's Interconnection Wire
                         Center(s) or special trunking will be required for
                         interconnection to such ancillary services.

      4.2.2 SWBT shall  interconnect  with DTI's  facilities  under terms and
conditions no less favorable than those identified in sub-section 4.2.1, above.

      4.3   METHODS FOR INTERCONNECTION

      Where the Parties interconnect, for the purpose of exchanging traffic
between networks, the Parties may use the following interconnection methods of
each Tandem and End Office identified in Appendix DCO making use of facilities
they own or lease from a third party.

         4.3.1 Physical Collocation Interconnection ("PCI") - Where DTI provides
fiber cable and connects to its equipment  located in the SWBT Wire Center.  DTI
owns and maintains DTI's equipment.

         4.3.2 Virtual Collocation  Interconnection ("VCI") - Where DTI provides
fiber  cable  to  SWBT  for  connection  to  DTI-designated  basic  transmission
equipment  dedicated solely for DTI's use,  located in the SWBT  Interconnection
Wire Center.  SWBT owns and  maintains the basic  transmission  equipment at the
SWBT Interconnection Wire Center. This option shall be consistent with the terms
of SWBT's virtual collocation tariff.

         4.3.3  SONET-Based  Interconnection  ("SBI") - Where DTI provides fiber
cable to SWBT for connection to  SWBT-designated  basic  transmission  equipment
located at the SWBT  Interconnection  Wire Center and dedicated solely for DTI'S
use. SWBT owns and maintains the basic transmission equipment. This option shall
be consistent with SWBT's SBI tariff.

         4.3.4  Leased   Facility   Interconnection   ("LFI")  -  Where  network
facilities  exist,  either  Party may lease  facilities  from the other Party at
rates no greater than SWBT Access Tariff rates.

         4.3.5 Mid-span Fiber Interconnection ("MSFI") - Where the Parties agree
to  interconnect  through SONET  technology,  using a Fujitsu  originating  line
terminating   multiplexer   fiber  optic  terminal   ("FOT")   details  of  this
architecture  are addressed in Appendix MSFI attached hereto and incorporated by
reference.  This  interconnection  arrangement  is  limited  to  interconnecting
trunks.




<PAGE>   13


                                                    GENERAL TERMS AND CONDITIONS
                                                                  DTI - ARKANSAS
                                                                    PAGE 8 OF 42



         4.3.6 The Parties may agree to utilize another  Interconnection  Method
as may be determined to be technically feasible in the future.

      4.4  PHYSICAL  ARCHITECTURE.  Using one or more of the  Interconnection
Methods  described  in Section 4.3 above,  the Parties  will agree on a physical
architecture plan. This plan will be documented within Appendix DCO. The Parties
agree to deploy one physical  architecture  plan per Metropolitan  Serving Area.
The two  architecture  arrangements,  End Point  Meet and  Mid-Point  Meet,  are
discussed below. Additional physical architectures, as yet undefined, may evolve
during the term of this Agreement.  These future as yet undefined  architectures
can be deployed if mutually agreed upon.

         4.4.1 End Point  Meet.  Using the "End Point  Meet"  architecture,  the
Parties will establish transport  facilities from their own Central Office(s) to
the other party's  Central  Office(s)  utilizing  any method of  interconnection
described in Section 4.3 above.  Unless  otherwise  mutually  agreed upon,  each
Party will use its own transport facilities to provide its trunking as set forth
in Appendix  ITR. Each Party will be  responsible  for the  appropriate  sizing,
operation,  and  maintenance  of its  own  transport  facilities.  If  initially
deployed  as an End  Point  Architecture,  the  deployment  architecture  may be
migrated or groomed, upon mutual agreement, to a Mid-Point Meet architecture.

         4.4.2  Mid-Point  Meet.  Using the  Mid-Point  Meet  architecture,  the
Parties will agree upon a Network Interconnection Point (NIP). The NIP functions
as a demarcation  point for each Party.  Each Party is  responsible to transport
all  trunking  to its side of the NIP  utilizing  any method of  interconnection
described in Section 4.3 above.  Each Party is responsible  for the  appropriate
sizing, operation, and maintenance of the transport facility and trunking to the
NIP.

         4.4.2.1 A second NIP can be established to eliminate a "single point of
failure" when mutually agreed upon. The  establishment  of the second NIP should
not require  additional  or increased  trunking or  facilities  of either Party.
Trunking  from the  initial NIP will be groomed or  augmented  to the second NIP
upon mutual agreement.

         4.4.2.2 When  required,  based on  guidelines  established  pursuant to
Appendix  ITR,  either Party may trunk  directly to the other Party's EO. If the
Party is virtually or  physically  collocated  to the EO, then that  collocation
will be  designated a NIP.  This  collocation  will be used for the transport of
direct  EO  trunking,  in  addition  to  other  uses.  The  collocated  Party is
responsible  for the  appropriate  sizing,  operation,  and  maintenance  of the
transport  facility.  In the instance where the Party is not collocated,  the EO
trunk  group will be handed off at the  original  NIP and both  Parties  will be
responsible for the transport facility on their side of that NIP.

         4.4.2.3  Unless  otherwise  mutually  agreed upon,  when Mid-Point Meet
architecture  has been deployed,  it will remain as the  architecture  of choice
during the term of this Agreement.


<PAGE>   14


                                                    GENERAL TERMS AND CONDITIONS
                                                                  DTI - ARKANSAS
                                                                    PAGE 9 OF 42


      4.5 TECHNICAL SPECIFICATIONS

         4.5.1 DTI and SWBT shall work  cooperatively  to install and maintain a
reliable network.  DTI and SWBT shall exchange  appropriate  information  (e.g.,
maintenance contact numbers, network information, information required to comply
with law  enforcement  and other  security  agencies of the  Government and such
other  information as the Parties shall mutually  agree) to achieve this desired
reliability.

         4.5.2 DTI and SWBT  shall work  cooperatively  to apply  sound  network
management principles by invoking network management controls to alleviate or to
prevent congestion.

         4.5.3 Technical Publications that describes the practices,  procedures,
specifications and interfaces generally utilized by SWBT, are listed in Appendix
TP attached hereto and incorporated by reference. Appendix TP will herein assist
the Parties in meeting their respective Interconnection responsibilities. Copies
of the publications  listed in Appendix TP have been or shall be provided to DTI
by SWBT.

      4.6 INTERCONNECTION IN ADDITIONAL METROPOLITAN EXCHANGE AREAS

         4.6.1 If DTI decides to offer Telephone  Exchange Services in any other
Metropolitan  Exchange  and Areas in which SWBT also offers  Telephone  Exchange
Services,  DTI shall  provide  written  notice to SWBT of the need to  establish
Interconnection in such Metropolitan Exchange Areas pursuant to this Agreement.

         4.6.2 The notice  provided  in Section  4.6.1  shall  include:  (i) the
initial Routing Point DTI has designated in the Metropolitan Exchange Area; (ii)
DTI's  requested  Interconnection  Activation  Date;  and  (iii)  a  non-binding
forecast of DTI's trunking requirements.

         4.6.3  Unless  otherwise  agreed  by the  Parties,  the  Parties  shall
designate the Wire Center that DTI has  identified as its initial  Routing Point
in the Metropolitan  Exchange Area as DTI Interconnection Wire Center ("IWC") in
that Metropolitan  Exchange Area and shall designate the SWBT Tandem Office Wire
Center within the Metropolitan  Exchange Area nearest to the IWC (as measured in
airline miles utilizing the V&H coordinates method) as the SWBT  Interconnection
Wire Center (SIWC) in that Metropolitan Exchange Area.

         4.6.4  Unless  otherwise  agreed by the  Parties,  the  Interconnection
Activation Date in each new Metropolitan  Exchange Area shall be the one-hundred
and fiftieth  (150th) day following  the date on which DTI  delivered  notice to
SWBT of the need to establish  Interconnection  pursuant to Section 4.6.1 above.
Within ten (10)  business days of SWBT's  receipt of DTI's notice,  SWBT and DTI
shall  confirm  their  respective  Wire  Centers  to be  Interconnected  and the
Interconnection  Activation  Date  for the  new  Metropolitan  Exchange  Area by
attaching a supplementary schedule to Appendix DCO.




<PAGE>   15



                                                    GENERAL TERMS AND CONDITIONS
                                                                  DTI - ARKANSAS
                                                                   PAGE 10 OF 42

5.0 TRANSMISSION AND ROUTING OF TELEPHONE EXCHANGE SERVICE
    TRAFFIC PURSUANT TO SECTION 251(c)(2)

    5.1 SCOPE OF TRAFFIC

    This Section 5.0 prescribes parameters for Traffic Exchange trunk groups 
the Parties shall establish over the Interconnections specified in Section 
4.0. The Parties shall employ the Traffic Exchange trunk groups specified in 
this Section 5.0 and in Appendix ITR. The Parties shall employ for the 
transmission and routing of all Local and IntraLATA Toll Traffic between the
Parties' respective Telephone Exchange Service end users.

         5.1.1  For  purposes  of  compensation   under  this   Agreement,   the
telecommunications  traffic  traded  between DTI and SWBT will be  classified as
either Local Traffic, Transit Traffic, Optional Calling Area Traffic,  IntraLATA
Interexchange  Traffic,  InterLATA  Interexchange  Traffic, or FGA Traffic.  The
compensation  arrangement  for the  joint  provision  of  Feature  Group A (FGA)
Services is covered in Appendix FGA, attached hereto and incorporated  herein by
reference. The Parties agree that, notwithstanding the classification of traffic
under this  Agreement,  either  Party is free to define its own "local"  calling
area(s) for purposes of its provision of Telecommunications  Services to its end
users.

         5.1.2 Calls  originated  by one Party's end user and  terminated to the
other  Party's  end user  will be  classified  as  "Local  Traffic"  under  this
Agreement if the call:  (i) originates  and terminates in the same SWBT exchange
area; or  (ii) originates  and terminates  within  different SWBT Exchanges that
share a common  mandatory  local calling  area,  e.g.,  mandatory  Extended Area
Service (EAS),  mandatory  Extended Local Calling Service (ELCS),  or other like
types of mandatory expanded local calling scopes.

    5.2 RESPONSIBILITIES OF THE PARTIES

         5.2.1 Each Party to this Agreement will be responsible for the accuracy
and quality of its data as submitted to the respective Parties involved.

         5.2.2 Each Party will  include in the  information  transmitted  to the
other for each call being  terminated on the other's network (where  available),
the originating Calling Party Number (CPN).

         5.2.3 If the percentage of calls passed with CPN is greater than ninety
percent (90%),  all calls exchanged  without CPN  information  will be billed as
either Local  Traffic or  IntraLATA  Toll  Traffic in direct  proportion  to the
minutes of use (MOU) of calls exchanged with CPN information.  If the percentage
of calls  passed with CPN is less than ninety  percent  (90%),  all calls passed
without CPN will be billed as switched access.

         5.2.4 The type of originating calling number transmitted depends on the
protocol  of the trunk  signaling  used for  interconnection.  Traditional  toll
protocol will be used



<PAGE>   16


                                                    GENERAL TERMS AND CONDITIONS
                                                                  DTI - ARKANSAS
                                                                   PAGE 11 OF 42


with Multi-Frequency  (MF) signaling,  and ANI will be sent from the originating
Party's  end  office  switch to the  terminating  Party's  tandem or end  office
switch.

         5.2.5  Where  one  Party  is  passing  CPN but the  other  party is not
properly receiving  information,  the Parties will cooperate to rate the traffic
correctly.

      5.3 RECIPROCAL COMPENSATION FOR TERMINATION OF LOCAL TRAFFIC

         5.3.1 The  Compensation set forth below will apply to all Local Traffic
as defined in sub-section 5.1.2 of this Agreement.

         5.3.2 Applicability of Rates

               i)       The rates,  terms,  conditions in this Section 5.3 apply
                        only to the  termination  of Local  Traffic,  except  as
                        explicitly noted.

               ii)      The  Parties  agree to  compensate  each  other  for the
                        termination  of Local  Traffic  on a minute of use (MOU)
                        basis.

         5.3.3 Rate Elements

               5.3.3.1 A Tandem  Served  rate  element is  applicable  to Tandem
Routed Local Traffic on a terminating local MOU basis and includes  compensation
for the following sub-elements:

                              i) Tandem  Switching - compensation for the use of
                              tandem switching functions.

                              ii)  Tandem   Transport  -  compensation  for  the
                              transmission  facilities  between the local tandem
                              and the end offices subtending that tandem.

                              iii) End Office  Switching - compensation  for the
                              local EO  office  switching  and line  termination
                              functions necessary to complete the transmission.

               5.3.3.2   An  End  Office   Served   rate   element   applies  to
direct-routed  Local  Traffic  on a  terminating  local MOU  basis and  includes
compensation for End Office Switching. This includes direct-routed Local Traffic
that terminates to offices that have combined tandem and End Office functions.





<PAGE>   17


                                                    GENERAL TERMS AND CONDITIONS
                                                                  DTI - ARKANSAS
                                                                   PAGE 12 OF 42

                            5.3.4   Local Traffic Interconnection Rates


                               Serving Method            Prices Per MOU
                               Tandem Served             $.00975
                               End Office Served         $.00720


         5.4      RECIPROCAL COMPENSATION FOR TRANSIT TRAFFIC

                  5.4.1 Transit Traffic allows one Party to send traffic to a
third party network through the other Party's tandem. A Transit Traffic rate
element applies to all MOUs between a Party and third party networks that
transit the other Party's tandem switch. The originating Party is responsible
for the appropriate rates unless otherwise specified. The Transit Traffic rate
element is only applicable when calls do not originate with (or terminate to)
the transit Party's end user. The two categories of Transit Traffic are: i)
Local, and ii) Optional Area. The following details when each element applies:

                           i)      The Local Transit Traffic rate element
                                   applies when both the originating and
                                   terminating end users are within SWBT local
                                   and mandatory exchanges.

                           ii)     The  Optional   Area  Transit   Traffic  rate
                                   element  applies  when  one end  user is in a
                                   SWBT  optional  exchange  which is  listed in
                                   Appendix Map and the other end user is within
                                   the SWBT local or  mandatory  exchanges.  The
                                   Parties agree also to apply the Optional Area
                                   Transit rate to traffic  terminating to third
                                   party  incumbent  LECs  that  share a  common
                                   mandatory  local  calling  area with all SWBT
                                   exchanges included in a specific metropolitan
                                   exchange area.  ILEC mandatory  exchanges are
                                   listed in Appendix Map.

                           5.4.1.1 The Parties acknowledge that traffic
         originated in third party incumbent LEC mandatory exchange areas as
         listed in Appendix Map, which is attached hereto and incorporated by
         reference, may traverse the SWBT tandem and terminate in other third
         party LEC exchange areas. Although direct connections could be used for
         this traffic, SWBT agrees to transit this traffic for the rate of
         $0.006 per MOU if the other LEC exchanges share a common mandatory
         local calling area with all SWBT exchanges included in a specific
         exchange area.


                             Type of Transit Traffic        Prices Per MOU

                             Local Transit                  $0.003
                             Optional Area Transit          $0.004



<PAGE>   18


                                                    GENERAL TERMS AND CONDITIONS
                                                                  DTI - ARKANSAS
                                                                   PAGE 13 OF 42


                  5.4.2 All other traffic which transits a tandem shall be
treated as Meet-Point Billing Traffic as described in Section 5.6 below or as
intraLATA interexchange traffic as described in Section 5.5.3 below, unless
otherwise agreed.

                  5.4.3 Each Party represents that it shall not send Local
Traffic to the other Party that is destined for the network of a third party
unless and until such Party has the authority to exchange traffic with the third
party.

         5.5      RECIPROCAL COMPENSATION FOR TERMINATION OF INTRALATA
                  INTEREXCHANGE TRAFFIC

                  5.5.1 Optional Calling Area Compensation (OCA) - For the SWBT
optional calling areas listed in Appendix Map, the compensation for termination
of intercompany traffic will be at a rate of $0.016 per MOU. This terminating
compensation rate applies to all traffic to and from the exchange(s) listed in
Appendix Map, and the associated metropolitan area and is independent of any
retail service arrangement established by either DTI or SWBT.

                  5.5.2 The parties also agree to apply the OCA compensation
rate of $0.016 per MOU for traffic terminating to DTI end users in other
incumbent LEC exchange that share a common mandatory local calling area with all
SWBT exchanges that are included in the metropolitan exchange area.
Appendix Map lists the shared mandatory local calling areas.

                  5.5.3 For intrastate intraLATA interexchange service traffic,
compensation for termination of intercompany traffic will be at terminating
access rates for Message Telephone Service (MTS) and originating access rates
for 800 Service, including the Carrier Common Line (CCL) charge, as set forth in
each party's Intrastate Access Service Tariff or as otherwise mutually agreed.
For interstate intraLATA intercompany service traffic, compensation for
termination of intercompany traffic will be at terminating access rates for MTS
and originating access rates for 800 Service including the CCL charge, as set
forth in each party's interstate Access Service Tariff or as otherwise mutually
agreed.

         5.6      COMPENSATION FOR ORIGINATION AND TERMINATION OF SWITCHED 
                  ACCESS SERVICE TRAFFIC TO OR FROM AN IXC (MEET-POINT  
                  BILLING (MPB) ARRANGEMENTS)

                  5.6.1 For interstate, interLATA traffic, terminating
compensation will be at access rates as set forth in each Party's own applicable
access tariffs.

                  5.6.2 The Parties will establish MPB arrangements in order to
provide Switched Access Services to IXCs via SWBT's access tandem switch in
accordance with the MPB guidelines adopted by and contained in the Ordering and
Billing Forum's MECOD and MECAB documents. DTI's Meet Points with SWBT shall be
those identified in Appendix DCO and any supplements thereto.



<PAGE>   19



                                                    GENERAL TERMS AND CONDITIONS
                                                                  DTI - ARKANSAS
                                                                   PAGE 14 OF 42



                  5.6.3 Billing to IXCs for the Switched Exchange Access
Services jointly provided by the Parties via Meet-Point Billing arrangement
shall be according to the multiple bill/multiple tariff method. As described in
the MECAB document, each Party will render a bill in accordance with its own
tariff for that portion of the service it provides. For the purpose of this
Agreement, DTI is the Initial Billing Company (IBC) and SWBT is the Subsequent
Billing Company (SBC). The assignment of revenues, by rate element, and the
Meet-Point Billing percentages applicable to this Agreement are set forth in
Appendix DCO. The actual rate values for each element shall be the rates
contained in that Party's own applicable access rates.

                  5.6.4 The Parties, as applicable, will maintain provisions in
their respective federal and state access tariffs, or provisions within the
National Exchange Carrier Association (NECA) Tariff No. 4, or any successor
tariff, sufficient to reflect this MPB arrangement, including MPB percentages.

                  5.6.5 As detailed in the MECAB document, the Parties will, in
accordance with accepted time intervals, exchange all information necessary to
accurately, reliably and promptly bill third Parties for Switched Access
Services traffic jointly handled by the Parties via the Meet Point Arrangement.
Each Party reserves the right to charge the other Party for the
recording/processing functions it performs pursuant to the terms and conditions
of Appendix Recording attached hereto and incorporated by reference. Information
shall be exchanged in Exchange Message Record (EMR) format, on magnetic tape or
via a mutually acceptable electronic file transfer protocol.

                  5.6.6 Initially, billing to IXCs for the Switched Access
Services jointly provided by the parties via the MPB arrangement will be
according to the multiple bill/multiple tariff method, as described in the MECAB
document. Each Party will render a bill to the IXC in accordance with its own
rate structure for that portion of the service it provides. Each Party will bill
its own network access service rates to the IXC. The residual interconnection
charge (RIC), if any, will be billed by the Party providing the End Office
function.

                  5.6.7 Meet-Point Billing shall also apply to all jointly
provided MOU traffic bearing the 900, 800, and 888 NPAs or any other
non-geographic NPAs which may likewise be designated for such traffic in the
future where the responsible party is an IXC. When SWBT performs 800 database
queries, SWBT will charge the provider of the Signaling Service Point for the
database query in accordance with standard industry practices.

                  5.6.8 Each Party shall coordinate and exchange the billing
account reference ("BAR") and billing account cross reference ("BACR") numbers
for the Meet Point Billing service. Each Party shall notify the other if the
level of billing or other BAR/BACR elements change, resulting in a new BAR/BACR
number.

                  5.6.9 Each Party will provide the other with the Exchange
Access detailed usage data within thirty (30) days of the end of the billing
period. SWBT will perform assembly and editing, messages processing and
provision of Access Usage Records in accordance with 




<PAGE>   20


                                                    GENERAL TERMS AND CONDITIONS
                                                                  DTI - ARKANSAS
                                                                   PAGE 15 OF 42



Appendix  Recording,  attached hereto and incorporated by reference.  Each Party
will provide to the other the Exchange Access summary usage data within ten (10)
working  days after the date that a bill is  rendered  to the IXC by the initial
Party.  To the extent DTI  provides  SWBT with Access Usage  Records,  SWBT will
compensate DTI on the same terms as DTI compensates SWBT per Appendix Recording.
SWBT  acknowledges  that  currently  there is no charge for  Summary  Usage Data
Records but that such a charge may be appropriate.  At DTI's request,  SWBT will
negotiate a mutual and  reciprocal  charge for  provision of Summary  Usage Data
Records.

                  5.6.10 Errors may be discovered by DTI, the IXC or SWBT. Both
SWBT and DTI agree to provide the other Party with notification of any
discovered errors within two (2) business days of the discovery.

                  5.6.11 In the event of a loss of data, both Parties shall
cooperate to reconstruct the lost data within sixty (60) days of notification
and if such reconstruction is not possible, shall accept a reasonable estimate
of the lost data, based upon no more than three (3) to twelve (12) months of
prior usage data, if available.

         5.7      BILLING  ARRANGEMENTS  FOR  COMPENSATION  FOR  TERMINATION  OF
                  INTRALATA, LOCAL, TRANSIT, AND OPTIONAL CALLING AREA TRAFFIC

                  5.7.1 Other than for traffic described in sub-section 5.6
above, each Party shall deliver monthly settlement statements for terminating
the other Party's traffic based on the following:

                           5.7.1.1 Each Party shall,  unless  otherwise  agreed,
adhere  to  the  detailed  technical   descriptions  and  requirements  for  the
recording,  record exchange,  and billing of traffic using the guidelines as set
forth in the Technical Exhibit Settlement Procedures (TESP), previously provided
by SWBT to DTI. Reference to this technical  publication is included in Appendix
TP.

                           (a)       Where DTI has direct/high usage trunks to a
                                     SWBT end office with overflow trunking
                                     through a SWBT tandem, billing for the
                                     Tandem Traffic will be calculated as
                                     follows:

                                     Total Originating MOUs Recorded By DTI Less
                                     Direct End Office Terminating MOUs Recorded
                                     By SWBT Equals Total MOUs To Be Compensated
                                     As Tandem Traffic

                           (b)       Where DTI has direct/high usage trunks to a
                                     third party with overflow trunking through
                                     a SWBT tandem, DTI must differentiate the
                                     originating MOU records for the Parties to
                                     ascertain how many MOUs should be
                                     compensated as Transit Traffic. If DTI is
                                     unable to so differentiate the originating
                                     MOU 



<PAGE>   21



                                                    GENERAL TERMS AND CONDITIONS
                                                                  DTI - ARKANSAS
                                                                   PAGE 16 OF 42


                                     records,  the Parties shall  mutually agree
                                     upon a  surrogate  method  for  calculating
                                     Transit Traffic charges owed to SWBT.

                           5.7.1.2 On a monthly  basis,  each Party will  record
its originating MOU including  identification of the originating and terminating
NXX for all intercompany calls.

                  5.7.1.3 Each Party will transmit the summarized originating
MOU from Section 5.7.1.1 above to the transiting and/or terminating Party for
subsequent monthly intercompany settlement billing.

                  5.7.1.4 Bills rendered by either Party will be paid within
thirty (30) days of receipt subject to subsequent audit verification.

                  5.7.1.5 MOUs for the rates contained herein will be measured
in seconds by call type, and accumulated each billing period into one (1) minute
increments for billing purposes in accordance with industry rounding standards.

                           5.7.1.6 Each Party will  multiply  the tandem  routed
and end office routed terminating MOUs by the appropriate rate contained in this
Section to determine the total monthly billing to each Party.

         5.8      COMPENSATION FOR "PORTING" OPTIONAL CALLING AREA NUMBERS

         In those instances where an Optional Calling Area telephone number is
ported, DTI will compensate SWBT $12.00 monthly, per ported number.

6.0      TRANSMISSION AND ROUTING OF EXCHANGE ACCESS TRAFFIC 
         PURSUANT TO 251(c)(2)

         6.1      SCOPE OF TRAFFIC

         Section 6.0 prescribes parameters for certain trunk groups ("Access
Toll Connecting Trunks") to be established over the Interconnections specified
in Section 4.0 above, for the transmission and routing of Exchange Access
traffic between DTI Telephone Exchange Service end users and IXCs via a SWBT
access tandem.

         6.2      TRUNK GROUP ARCHITECTURE AND TRAFFIC ROUTING

                  6.2.1 The Parties shall jointly establish Access Toll
Connecting Trunks as described in Appendix ITR, by which will jointly provide
tandem-transported Switched Exchange Access Services to IXCs to enable DTI's end
users to originate and terminate traffic to/from such IXCs.



<PAGE>   22


                                                    GENERAL TERMS AND CONDITIONS
                                                                  DTI - ARKANSAS
                                                                   PAGE 17 OF 42



                  6.2.2 Access Toll Connecting Trunks shall be used solely for
the transmission and routing of Switched Exchange Access to allow DTI end users
to originate and terminate traffic to/from any IXCs which is connected to a SWBT
Access Tandem. In addition, the trunks shall be used to allow DTI's end users to
connect to, or be connected to, the 800 Services of any Telecommunications
Carrier connected to the SWBT Access Tandem.

7.0      TRANSPORT AND TERMINATION OF OTHER TYPES OF TRAFFIC

         7.1      INFORMATION SERVICES TRAFFIC

                  7.1.1 At such time as the Parties agree to route intraLATA
Information Services Traffic to one another, they shall agree to exchange rating
and billing information to effectively allow the Parties to bill their end users
and to charge reciprocal rates.

         7.2      LINE STATUS VERIFICATION (LSV)/BUSY LINE INTERRUPT (BLI)
                  TRAFFIC

                  7.2.1 Each Party's operator bureau shall accept LSV and BLI
inquiries from the operator bureau of the other Party in order to allow
transparent provision of LSV/BLI Traffic between the Parties' networks. Only one
LSV attempt will be made per end user operator bureau call, and the applicable
charge shall apply whether or not the line is busy at the time of verification
or if the called party agrees to release the line. Only one BLI attempt will be
made per end user operator telephone call, and the applicable charge shall apply
whether or not the line is in use at the to time of interrupt or the called
party releases the line.

                  7.2.2 Each Party shall route LSV/BLI Traffic inquiries
between the Parties' respective operator bureaus over trunks described in 
Appendix ITR.

         7.3      WIRELESS TRAFFIC

                  7.3.1 Appendix Wireless, attached hereto and incorporated by
reference sets forth the terms and conditions under which the Parties will
distribute revenue from their joint provision of Wireless Interconnection
Service for mobile to landline traffic terminating through the Parties'
respective wireline switching networks within a LATA. If one Party enters into
an interconnection agreement with a CMRS provider, Appendix Wireless shall no
longer be applicable between the Parties with respect to such CMRS providers,
and the other Party shall be obligated to enter into an agreement with such CMRS
provider for the termination of wireless to landline traffic.

                  7.3.2 DTI shall pay the Local Transit Traffic rate to SWBT for
calls that originate on DTI's network and are sent to SWBT for termination to a
CMRS Provider as long as such Traffic can be identified as wireless traffic.
SWBT shall pay the Local Transit Traffic rate to DTI for such calls that
originate on SWBT's network are sent through DTI for termination on a CMRS
Provider's network. Each Party shall be responsible for interconnection
agreements 



<PAGE>   23
                                                    GENERAL TERMS AND CONDITIONS
                                                                  DTI - ARKANSAS
                                                                   PAGE 18 OF 42



with CMRS providers for terminating compensation regarding traffic
originating on the Party's network and terminating on the CMRS provider's
network.

                  7.3.3 When traffic is originated by either Party to a CMRS
Provider, and the traffic cannot be specifically identified as wireless traffic
for purposes of compensation between SWBT and DTI, the traffic will be rated
either as Local, Optional or Access and the appropriate compensation rate shall
be paid by the originating Party to the transiting Party. The originating Party
agrees to indemnify the transiting Party for any claims of compensation that may
be made by the CMRS provider against the transiting Party regarding compensation
for such traffic.

8.0      SIGNALING

         8.1 The SWBT signaling publications that describe the practices,
procedures and specifications generally utilized by SWBT for signaling purposes
and are listed in Appendix TP which is attached hereto and incorporated herein.
A copy of these publications have been provided to DTI.

         8.2 The Parties will cooperate on the exchange of Transactional
Capabilities Application Part (TCAP) messages to facilitate interoperability of
CCS-based features between their respective networks, including all CLASS
features and functions, to the extent each Party offers such features and
functions to its end users. All CCS signaling parameters will be provided
including, without limitation, calling party number (CPN), originating line
information (OLI), calling party category and charge number.

9.0      NUMBERING

         9.1 Nothing in this Agreement shall be construed to limit or otherwise
adversely impact in any manner either Party's right to employ or to request and 
be assigned any North American Numbering Plan (NANP) number resources including,
but not limited to, central office (NXX) codes pursuant to the Central Office 
Code Assignment Guidelines(1), or to establish, by tariff or otherwise, 
Exchanges and Rating Points corresponding to such NXX codes. Each Party is 
responsible for administering the NXX codes it is assigned.

         9.2 At a minimum, in those Metropolitan Exchange Areas where DTI
intends to provide local exchange service, DTI shall obtain a separate NXX code
for each SWBT exchange or group of exchanges that share a common mandatory
calling scope as defined in SWBT tariffs. This will enable DTI and SWBT to
identify the jurisdictional nature of traffic for intercompany compensation
until such time as both Parties have implemented billing and routing
capabilities to determine traffic jurisdiction on a basis other than NXX codes.

_________________

(1)   Last published by the Industry Numbering Committee ("INC") as INC
95-0407-008, Revision 4/7/95, formerly ICCF 93-0729-010.

<PAGE>   24



                                                    GENERAL TERMS AND CONDITIONS
                                                                  DTI - ARKANSAS
                                                                   PAGE 19 OF 42




         9.3 Each Party agrees to make available to the other, up-to-date
listings of its own assigned NPA-NXX codes, along with associated Rating Points
and Exchanges.

         9.4 To the extent SWBT serves as Central Office Code Administrator for
a given region, SWBT commits to treat DTI requests for assignment of central
office code(s) in a neutral and nondiscriminatory manner, consistent with
regulatory requirements, and (NXX) Central Office Code Assignment Guidelines.

         9.5 Each Party is responsible to program and update its own switches
and network systems to recognize and route traffic to the other Party's assigned
NXX codes at all times. Neither Party shall impose fees or charges on the other
Party for such required programming and updating activities.

         9.6 Each Party is responsible to input required data into the Routing
Data Base Systems (RDBS) and into the Bellcore Rating Administrative Data
Systems (BRADS) or other appropriate system(s) necessary to update the Local
Exchange Routing Guide (LERG), unless negotiated otherwise.

         9.7 Neither Party is responsible for notifying the other Parties' end
users of any changes in dialing arrangements, including those due to NPA
exhaust, unless otherwise ordered by the Commission, the FCC, or a court.

         9.8 NXX MIGRATION. Where either Party has activated an entire NXX for a
single end user, or activated more than half of an NXX for a single end user
with the remaining numbers in that NXX either reserved for future use or
otherwise unused, if such end user chooses to receive service from the other
Party, the first Party shall cooperate with the second Party to have the entire
NXX reassigned in the LERG (and associated industry databases, routing tables,
etc.) to an End Office operated by the second Party. Such transfer will require
development of a transition process to minimize impact on the Network and on the
end user(s)' service and will be subject to appropriate industry lead times
(currently forty-five (45) days) for movements of NXXs from one switch to
another. The Party to whom the NXX is migrated will pay NXX migration charges of
$10,000 per NXX to the Party formerly assigned the NXX.



10.0     RESALE -- SECTIONS 251(b)(1); 251(c)(4); 252(d)(3); and 271(c)(2)(B)
         (xiv);

         10.1  AVAILABILITY OF SWBT RETAIL TELECOMMUNICATIONS SERVICES FOR 
         RESALE


        SWBT   shall   offer   to  DTI  for   resale   at   wholesale   rates  
its Telecommunications  Services,  as  described  in Section  251(c)(4)  of
the Act, pursuant to the terms and  conditions  of Appendix  Resale 
attached  hereto and incorporated herein by this reference.

         10.2 AVAILABILITY OF DTI RETAIL TELECOMMUNICATION SERVICES FOR RESALE




<PAGE>   25



                                                    GENERAL TERMS AND CONDITIONS
                                                                  DTI - ARKANSAS
                                                                   PAGE 20 OF 42





                  DTI shall make available its Telecommunications Services for
                  resale at wholesale rates to SWBT in accordance with Section
                  251(b)(1) of the Act.

11.0     UNBUNDLED NETWORK ELEMENTS -- SECTIONS 251(c)(3), 271(c)(2)(B) 
         (ii),(iv),(v),(vi),(x)

         11.1 SWBT shall provide DTI access to unbundled network elements for
the provision of a telecommunication service as described in Section 251(c)(3)
and 271(c)(2)(B) of the Act, pursuant to the terms and conditions of Appendix
UNE attached hereto and incorporated herein by this reference.

         11.2 DTI shall make available to SWBT access to its Unbundled Network
elements in accordance with Section 251(c)(3) of the Act.

12.0     NOTICE OF CHANGES -- SECTION 251(c)(5)

         Nothing in this Agreement shall limit either Party's ability to upgrade
its network through the incorporation of new equipment, new software or
otherwise. If a Party makes a change in its network which it believes will
materially affect the interoperability of its network with the other Party, the
Party making the change shall provide at least ninety (90) days advance written
notice of such change to the other Party. Notwithstanding the foregoing, if
either Party establishes additional tandems in an exchange area in which the
other Party offers local exchange service, that Party will provide the other
Party with not less than one-hundred eighty (180) days' advance notification of
same, and with greater notification when practicable. Both Parties agree to
coordinate interconnection matters consistent with the requirements of the
Americans with Disabilities Act (42 U.S.C. 12101) and with Sections 255 and 256
of the Act. In addition, the Parties will comply with the Network Disclosure
rules adopted by the FCC in CC Docket No. 96-98, Second Report and Order, as may
be amended from time to time. The Party upgrading its network shall be solely
responsible for the cost and effort of accommodating such changes in its own
network.

13.0     COLLOCATION -- SECTION 251(c)(6)

         13.1 SWBT shall provide to DTI Physical Collocation space necessary for
Interconnection (pursuant to Section 4.0 of this Agreement) or access to Network
Elements on an unbundled basis except that SWBT may provide for Virtual
Collocation if SWBT demonstrates that Physical Collocation is not practical for
technical reasons or because of space limitations, as provided in Section
251(c)(6) of the Act. SWBT shall provide such Collocation for the purpose of
Interconnection or access to Network Elements on an unbundled basis, except as
otherwise mutually agreed to in writing by the Parties or as required by the FCC
or the appropriate Commission, subject to applicable federal and state tariffs.

         13.2 Except as otherwise ordered by the Commission or the FCC, or as
mutually agreed to by DTI and SWBT, Physical Collocation shall be available at a
Central Office Switch 



<PAGE>   26
                                                    GENERAL TERMS AND CONDITIONS
                                                                  DTI - ARKANSAS
                                                                   PAGE 21 OF 42



location  classified as an end office location, a serving wire center, a tandem
office  location,  or a remote  node that  serves as a rating  point for special
access or switched access transport.

 
14.0       NUMBER PORTABILITY -- SECTIONS 251(b)(2) and 271(c)(2)(B)(xi)

           14.1 The Parties  shall provide to each other  Interim  Number  
Portability (INP) on a  reciprocal  basis.  Pursuant to the  provisions  in 
the Act,  and in accordance  with the terms and conditions  outlined in 
Appendix  PORT,  which is attached hereto and  incorporated  herein, SWBT will 
provide DTI Interim Number Portability  through Remote Call Forwarding and 
Direct Inward Dialing technology until Permanent Number Portability is 
implemented.

           14.2 Once Permanent  Number  Portability is  implemented,  either 
Party may withdraw, at any time and at its sole discretion, its INP offerings, 
subject to thirty (30) day's  advance  notice to the other Party to allow the 
seamless and transparent conversion of INP end user numbers to Permanent 
Number Portability.

15.0       DIALING PARITY -- SECTION 251(b)(3); 271(c)(2)(B)(xii); AND 271(e)(2)

           15.1 The  Parties  shall  provide  Local  Dialing  Parity to each 
other as required under Section 251(b)(3) of the Act.

           15.2 SWBT shall provide IntraLATA Dialing Parity in accordance with 
Section 271(e)(2) of the Act.

16.0       ACCESS TO RIGHTS-OF-WAY -- SECTION 251(b)(4) AND 271(c)(2)(B)(iii)

                  Each Party shall provide the other Party access to its poles,
ducts, rights-of-way and conduits it owns or controls in accordance with Section
224 of the Act on terms, conditions and prices comparable to those offered to
any other entity pursuant to each Party's applicable tariffs and/or standard
agreements.

17.0       DATABASE ACCESS -- SECTION  271(c)(2)(B)(x)

           In accordance with Section 27(c)(2)(B)(x) of the Act, SWBT shall
provide DTI with nondiscriminatory access to databases and associated signaling
necessary for call routing and completion. When requesting access to databases
not otherwise provided for in this Agreement, or appropriate interfaces,
regardless of whether they constitute unbundled Network Elements, DTI will use
the Network Element Bona Fide Request process. This process is defined in
Appendix UNE, which is attached hereto and incorporated herein by reference.

18.0       INTERCEPT REFERRAL ANNOUNCEMENTS

           18.1 The Party  formerly  providing  service to an end user shall 
provide a Basic Referral  announcement,  reciprocally  and free of charge on 
the abandoned telephone  number.  The


<PAGE>   27



                                                    GENERAL TERMS AND CONDITIONS
                                                                  DTI - ARKANSAS
                                                                   PAGE 22 OF 42




announcement states that the called number has been disconnected or changed and
provides the end user's new telephone number to the extent that it is listed.

                  (a)       Basic Intercept Referral Announcements are to be
                            provided on residential numbers for a minimum of
                            thirty (30) days where facilities exist and the
                            threat of telephone number exhaustion is not
                            imminent.

                  (b)       Basic Intercept Referral  Announcements for a single
                            line  business  end  user  and  the  primary  listed
                            telephone  number  for  DID and  "Centrex-type"  end
                            users,  shall be  available  for a minimum of thirty
                            (30) days or the life of the White Pages  directory,
                            whichever  is  greater.  If the threat of  telephone
                            number exhaustion  becomes imminent for a particular
                            Central Office,  the service  provider may reissue a
                            disconnected  number prior to the  expiration of the
                            directory,  but no  earlier  than  thirty  (30) days
                            after the  disconnection  of the business  telephone
                            number.

19.0     COORDINATED REPAIR CALLS

         19.1 To avoid and minimize the potential for end user confusion, each
Party shall inform their respective end users of their respective repair bureau
telephone number(s) to access such bureaus. In the event that either Party
receives a misdirected repair call, the Parties agree to employ the following
procedures for handling such calls:

                  (a)       To the extent the correct provider can be
                            determined, misdirected repair calls will be
                            referred to the proper provider of local exchange
                            service in a courteous manner, at no charge, and the
                            end user will be provided the correct contact
                            telephone number.

                  (b)       In responding to repair calls, neither Party shall
                            make disparaging remarks about each other, nor shall
                            they use these repair calls as the basis for
                            internal referrals or to solicit customers or to
                            market services, nor shall they initiate extraneous
                            communications beyond the direct referral to the
                            correct repair telephone number.

20.0     OTHER SERVICES 271(c)(B)(2)(vii) and 271(c)(2)(B)(viii)

         20.1 WHITE PAGES. In accordance with Section  271(c)(2)(B)(viii) of the
Act, SWBT will make  nondiscriminatory  access to White Pages service  available
under the terms and conditions of Appendix WP, attached hereto and  incorporated
by reference.

         20.2. CALLING NAME INFORMATION.  The Parties shall provide, on mutually
agreeable  and  reciprocal  terms,  each  other  with  access  to  Calling  Name
information of their  respective end users whenever one Party  initiates a query
from a  Signaling  System  Point  for such  information  associated  with a call
terminating to an end user who subscribes to a calling name service.



<PAGE>   28



                                                    GENERAL TERMS AND CONDITIONS
                                                                  DTI - ARKANSAS
                                                                   PAGE 23 OF 42




SWBT will provide  Calling Name  Information  in  accordance  with and under the
terms and  conditions of Appendix  CNAM,  attached  hereto and  incorporated  by
reference.

         20.3 BILLING/COLLECTING/REMITTING. The Parties will jointly agree to
terms and conditions for Billing, Collecting and Remitting for alternated billed
local message as described in Appendix BCR, attached hereto and incorporated by
reference.

         20.4 911 AND E911 SERVICES. Pursuant to Section 271(c)(2)(B)(vii) of
the Act, SWBT will make nondiscriminatory access to 911 and E911 services
available under the terms and conditions of Appendix 911, attached hereto and
incorporated by reference.

         20.5 DIRECTORY ASSISTANCE (DA). Pursuant to Section
271(c)(2)(B)(vii)(II) of the Act, SWBT will provide nondiscriminatory access to
DA services under the terms and conditions identified in Appendix DA, attached
hereto and incorporated by reference.

         20.6 OPERATOR SERVICES. Pursuant to Section 271(c)(2)(B)(vii)(III) of
the Act, SWBT shall provide nondiscriminatory access to Operator Services under
the terms and conditions identified in Appendix OS, attached hereto and
incorporated by reference.

         20.7 CLEARINGHOUSE SERVICES. To the extent requested by DTI, SWBT shall
provide for the tracking of message revenues from certain messages to facilitate
the transfer of revenues between the billing company the earning company through
the Clearinghouse Services provided by SWBT pursuant to the terms and conditions
in Appendix CH, attached hereto and incorporated by reference.

         20.8 HOSTING. At DTI's request, SWBT shall perform hosting
responsibilities for the provision of billable message data and/or access usage
data received from an DTI for distribution to the appropriate billing and/or
processing location or for delivery to an DTI of such data via SWBT's internal
network or the nationwide CMDS network pursuant to Appendix HOST, attached
hereto and incorporated by reference

         20.9 SIGNALING SYSTEM 7 INTERCONNECTION. At DTI's request, SWBT shall
perform SS7 interconnection services for DTI pursuant to Appendix SS7, attached
hereto and incorporated by reference.

21.0     GENERAL RESPONSIBILITIES OF THE PARTIES

         21.1  SWBT  and DTI  shall  each use  their  best  efforts  to meet the
Interconnection Activation Dates.



<PAGE>   29




                                                    GENERAL TERMS AND CONDITIONS
                                                                  DTI - ARKANSAS
                                                                   PAGE 24 OF 42



         21.2 Each Party is individually responsible to provide facilities
within its network that are necessary for routing, transporting, measuring, and
billing traffic from the other Party's network and for delivering such traffic
to the other Party's network in the standard format compatible with SWBT's
network as referenced in Bellcore's BOC Notes on LEC Networks Practice No.
SR-TSV-002275, and to terminate the traffic it receives in that standard format
to the proper address on its network. The Parties are each solely responsible
for participation in and compliance with national network plans, including the
National Network Security Plan and the Emergency Preparedness Plan.

         21.3 Neither Party shall use any service related to or use any of the
services or elements provided in this Agreement in any manner that interferes
with other persons in the use of their service, prevents other persons from
using their service, or otherwise impairs the quality of service to other
carriers or to either Party's end users, and either Party may discontinue or
refuse service, but only for so long as the other Party is violating this
provision. Upon such violation, either Party shall provide the other Party
notice of the violation at the earliest practicable time.

         21.4 Each Party is solely responsible for the services it provides to
its end users and to other Telecommunications Carriers.

         21.5 The Parties shall work cooperatively to minimize fraud associated
with third-number billed calls, calling card calls, and any other services
related to this Agreement.

         21.6 At all times during the term of this Agreement, each Party shall
keep and maintain in force at each Party's expense all insurance required by law
(e.g. workers' compensation insurance) as well as general liability insurance
for personal injury or death to any one person, property damage resulting from
any one incident, automobile liability with coverage for bodily injury for
property damage. Upon request from the other Party, each Party shall provide to
the other Party evidence of such insurance (which may be provided through a
program of self insurance).

         21.7 In addition to its indemnity obligations under Section 26.0, each
Party shall provide, in its tariffs and contracts with its end users that relate
to any Telecommunications Service provided or contemplated under this Agreement,
that in no case shall such Party or any of its agents, contractors or others
retained by such parties be liable to any end user or third party for (i) any
Loss relating to or arising out of this Agreement, whether in contract or tort,
that exceeds the amount such Party would have charged the applicable end user
for the service(s) or function(s) that gave rise to such Loss, and (ii) any
Consequential Damages.

         21.8 Unless otherwise stated, each Party will render a monthly bill to
the other for service(s) provided hereunder. Remittance in full will be due
within thirty (30) days of that billing date. Interest shall apply on overdue
amounts (other than disputed amounts which are subject to Section 30.12) at the
rate specified in Section 30.12, unless otherwise specified in an 



<PAGE>   30




                                                    GENERAL TERMS AND CONDITIONS
                                                                  DTI - ARKANSAS
                                                                   PAGE 25 OF 42


applicable  tariff.  Each Party  reserves  the right to net  delinquent  amounts
against amounts otherwise due the other.

         21.9 SWBT is participating with the industry to develop standardized
methods through the OBF and shall implement ordering and billing
formats/processes consistent with industry guidelines as capabilities are
deployed. Where such guidelines are not available or SWBT decides not to fully
utilize industry guidelines, SWBT will provide DTI with information on its
ordering and billing format/process and requirements at the earliest practicable
time.


22.0     EFFECTIVE DATE, TERM, AND TERMINATION

         22.1 This Agreement shall be effective ten (10) days after approval by
the Commission when it has determined that the Agreement complies with Sections
251 and 252 of the Act ("Effective Date").

         22.2 The initial term of this Agreement shall be one (1) year (the
"Term") which shall commence on the Date of Execution. Absent the receipt by one
Party of written notice from the other Party at least sixty (60) days prior to
the expiration of the Term to the effect that such Party does not intend to
extend the Term of this Agreement, this Agreement shall automatically renew and
remain in full force and effect on and after the expiration of the Term until
terminated by either Party pursuant to Section 22.3, below.

         22.3 Either Party may terminate this Agreement in the event that the
other Party fails to perform a material obligation that disrupts the operation
of either Party's network and/or end user service and fails to cure such
material nonperformance within forty-five (45) days after written notice
thereof.

         22.4 If pursuant to Section 22.2, above, this Agreement continues in
full force and effect after the expiration of the Term, either Party may
terminate this Agreement ninety (90) days after delivering written notice to the
other Party of its intention to terminate this Agreement, subject to Section
22.5, below. Neither Party shall have any liability to the other Party for
termination of this Agreement pursuant to this Section 22.4 other than its
obligations under Section 22.5, below.

         22.5 Upon  termination  or expiration  of this  Agreement in accordance
with this Section 22.0, above:

                  (a)      each  Party  shall   comply   immediately   with  its
                           obligations set forth in Section 30.6, below; and

                  (b)      each Party shall promptly pay all amounts (including
                           any late payment charges) owed under this Agreement;
                           and



<PAGE>   31




                                                    GENERAL TERMS AND CONDITIONS
                                                                  DTI - ARKANSAS
                                                                   PAGE 26 OF 42


              (c)      each Party 's indemnification obligations shall survive.

         22.6 If upon expiration or termination, the Parties are negotiating a
successor agreement; during such period, each Party shall continue to perform
its obligations and provide the services described herein that are to be
included in the successor agreement until such time as the latter agreement
becomes effective; provided however, that if the Parties are unable to reach
agreement within six (6) months after termination or expiration of this
Agreement, either Party has the right to submit this matter to the Commission
for resolution. Until a survivor agreement is reached or the Commission resolves
the matter, whichever is sooner, the terms, conditions, rates, and charges
stated herein will continue to apply, subject to a true-up based on the
Commission action, if any.

         22.7 Except as set forth in Section 28.5, below, no remedy set forth in
this Agreement is intended to be exclusive and each and every remedy shall be
cumulative and in addition to any other rights or remedies now or hereafter
existing under applicable law or otherwise.

23.0     DISCLAIMER OF REPRESENTATIONS AND WARRANTIES

         EXCEPT AS EXPRESSLY PROVIDED UNDER THIS AGREEMENT, NO PARTY MAKES OR
RECEIVES ANY WARRANTY, EXPRESS OR IMPLIED, WITH RESPECT TO THE SERVICES,
FUNCTIONS AND PRODUCTS IT PROVIDES UNDER OR CONTEMPLATED BY THIS AGREEMENT AND
THE PARTIES DISCLAIM THE IMPLIED WARRANTIES OF MERCHANTABILITY OR OF FITNESS FOR
A PARTICULAR PURPOSE. ADDITIONALLY, NEITHER SWBT NOR DTI ASSUMES RESPONSIBILITY
WITH REGARD TO THE CORRECTNESS OF DATA OR INFORMATION SUPPLIED BY THE OTHER WHEN
THIS DATA OR INFORMATION IS ACCESSED AND USED BY A THIRD PARTY.

24.0     CHANGES IN END USER LOCAL EXCHANGE SERVICE PROVIDER SELECTION

         Each Party will abide by applicable state or federal laws and
regulations in obtaining end user authorization prior to changing end user's
local service provider to itself and in assuming responsibility for any
applicable charges as specified in Section 258 (b) of the Telecommunications Act
of 1996. The Parties shall make authorization available to each other upon
request and at no charge. Only an end user can initiate a challenge to a change
in its local exchange service provider. If an end user notifies SWBT or DTI that
the end user requests local exchange service, the Party receiving such request
shall be free to immediately provide service to such end user. When an end user
changes or withdraws authorization, each Party shall release customer-specific
facilities in accordance with the end user's direction or the end user's
authorized agent. Further, when an end user abandons the premise, SWBT is free
to reclaim the unbundled network element facilities for use by another customer
and is free to issue service orders required to reclaim such facilities.



<PAGE>   32




                                                    GENERAL TERMS AND CONDITIONS
                                                                  DTI - ARKANSAS
                                                                   PAGE 27 OF 42



25.0     SEVERABILITY

         25.1 The Parties negotiated the services, arrangements,
Interconnection, terms and conditions of this Agreement by the Parties as a
total arrangement and are intended to be nonseverable, subject only to Section
30.16 of this Agreement.

         25.2 In the event the Commission, the FCC, or a court rejects any
portion or determines that any provision of this Agreement is contrary to law,
or is invalid or unenforceable for any reason, the Parties shall continue to be
bound by the terms of this Agreement, insofar as possible, except for the
portion rejected or determined to be unlawful, invalid, or unenforceable. In
such event, the Parties shall negotiate in good faith to replace the rejected,
unlawful, invalid, or unenforceable provision and shall not discontinue service
to the other party during such period if to do so would disrupt existing service
being provided to an end user. Nothing in this Agreement shall be construed as
requiring or permitting either Party to contravene any mandatory requirement of
federal or state law, or any regulations or orders adopted pursuant to such law.

26.0     INTELLECTUAL PROPERTY

         LSP is responsible for obtaining any license or right to use agreement
associated with a Unbundled Network Element purchased from SWBT. SWBT will
provide a list of all known and necessary licenses or right to use agreements
applicable to the subject Network Element(s) within seven days of a request for
such a list by LSP. SWBT agrees to use its best efforts to facilitate the
obtaining of any necessary license or right to use agreement. SWBT makes no
warranties, express or implied, concerning LSP's (or any third party's) rights
with respect to intellectual property (including with limitation, patent,
copyright, and trade secret rights) or contract rights associated with LSP's
rights to interconnect with SWBT's network and to Unbundled Network Elements.

27.0.    INDEMNIFICATION

         27.1 Except as otherwise provided herein or in specific appendices,
each Party shall be responsible only for service(s) and facility(ies) which are
provided by that Party, its authorized agents, subcontractors, or others
retained by such parties, and neither Party shall bear any responsibility for
the service(s) and facility(ies) provided by the other Party, its agents,
subcontractors, or others retained by such parties.

         27.2 Except as otherwise provided herein or in specific appendices, and
to the extent not prohibited by law and not otherwise controlled by tariff, each
Party (the "Indemnifying Party") shall defend and indemnify the other Party (the
"Indemnified Party") and hold such Indemnified Party harmless against any Loss
to a third party arising out of the negligence or willful misconduct by such
Indemnifying Party, its agents, its end user, contractors, or others retained by
such parties, in connection with the indemnifying provision of services or
functions under this Agreement.



<PAGE>   33




                                                    GENERAL TERMS AND CONDITIONS
                                                                  DTI - ARKANSAS
                                                                   PAGE 28 OF 42




         27.3 In the case of any Loss alleged or made by an end user of either
Party, the Party whose end user alleged or made such Loss (Indemnifying Party)
shall defend and indemnify the other Party (Indemnified Party) against any and
all such claims or Loss by its end users regardless of whether the underlying
service was provided or unbundled element was provisioned by the Indemnified
Party, unless the Loss was caused by the gross negligence or intentional
misconduct of the other (Indemnified) Party.

         27.4 LSP agrees to indemnify, defend and hold harmless SWBT from any
Loss arising out of SWBT's provision of 911 services or out of LSP's end users'
use of the 911 service, whether suffered, made, instituted, or asserted by LSP
or its end users, including for any personal injury or death of any person or
persons, except for Loss which is the direct result of SWBT's own negligence or
willful misconduct.

         27.5 Each Party shall be indemnified, defended and held harmless by the
other Party against any Loss arising from a Party's use of services or elements
provided under this Agreement involving: tort claims, including claims for
libel, slander, invasion of privacy, or infringement of copyright arising from a
Party's own communications or the communications of its end users.

         27.6 SWBT shall be indemnified, defended, and held harmless by the LSP
for claims for patent, trademark, infringement or other infringement or
intellectual property rights, arising from the LSP's use of services or
unbundled elements provided under this Agreement.

         27.7 The Indemnifying Party agrees to defend any suit brought against
the Indemnified Party for any Loss identified in this Section or specific
appendices. The Indemnified Party agree to notify the Indemnifying Party
promptly in writing of any written claims, lawsuits or demands for which the
Indemnifying Party may be responsible under this Agreement. The Indemnified
Party shall cooperate in every reasonable way to facilitate defense or
settlement. The Indemnifying Party shall have the right to control and conduct
the defense and settlement of any action or claim subject to the consultation of
the Indemnified Party. The Indemnifying Party shall not be responsible for any
settlement unless the Indemnifying Party approved such settlement in advance and
agrees to be bound by the settlement agreement.

28.0     LIMITATION OF LIABILITY

         28.1 Except for indemnity obligations under this Agreement, or except
as otherwise provided in specific appendices, each Party's liability to the
other Party for any Loss relating to or arising out of any negligent act or
omission in its performance under this Agreement, whether in contract or tort,
shall not exceed in total the amount SWBT or LSP has to or would have charged
the other Party for the affected service(s) or function(s) which were not
performed or were otherwise improperly performed.



<PAGE>   34


                                                    GENERAL TERMS AND CONDITIONS
                                                                  DTI - ARKANSAS
                                                                   PAGE 29 OF 42




         28.2 Except for Losses alleged or made by an end user of either Party,
or except as otherwise provided in specific appendices, in the case of any Loss
alleged or made by a third party arising under the negligence or willful
misconduct of both Parties, each Party shall bear, and its obligation under this
section shall be limited to, that portion (as mutually agreed to by the Parties)
of the resulting expense caused by its own negligence or willful misconduct or
that of its agents, servants, contractors, or others acting in aid or concert
with it.

         28.3 In no event shall either Party have any liability whatsoever to
the other Party for any indirect, special, consequential, incidental, or
punitive damages, including but not limited to, loss of anticipated profits or
revenue or other economic loss in connection with or arising from anything said,
omitted, or done hereunder (collectively, "Consequential Damages"), even if the
other Party has been advised of the possibility of such damages; provided that
the foregoing shall not limit a Party's obligation under this Agreement to
indemnify, defend, and hold the other Party harmless against any amounts payable
to a third party, including any losses, costs, fines, penalties, criminal or
civil judgments or settlements, expenses (including attorney's fees) and
Consequential Damages of such third party.

29.0     LIQUIDATED DAMAGES FOR SPECIFIED ACTIVITIES

         29.1 CERTAIN DEFINITIONS.  When used in this Section 29.0, the 
following terms shall have the meanings indicated:

                  29.1.1 "SPECIFIED PERFORMANCE BREACH" means the failure by
SWBT to meet the Performance Criteria for any Specified Activity for a period of
three (3) consecutive calendar months.

                  29.1.2 "Specified Activity" means any of the following
activities:

                           (i)      the   installation   by  SWBT  of  unbundled
                                    elements associated with DTI end user Lines;

                           (ii)     SWBT's    provision   of   Interim    Number
                                    Portability; or

                           (iii)    the repair of out of service problems for
                                    DTI ("Out of Service Repairs").

                  29.1.3  "Performance Criteria" means, with respect to each
calendar month during the term of this Agreement, the performance by SWBT during
such month of each Specified Activity shown below within the time interval shown
in at least eighty percent (80%) of the covered instances:



<PAGE>   35





                                                    GENERAL TERMS AND CONDITIONS
                                                                  DTI - ARKANSAS
                                                                   PAGE 30 OF 42





                                                      PERFORMANCE INTERVAL DATE
           SPECIFIED ACTIVITY                                                  
           (i)  DTI End User Lines

           1-10 Lines per Service Order               five  (5)  business   days
                                                      from  SWBT's   Receipt  of
                                                      valid Service Order       


           11-20 Lines per Service Order              ten  (10)   business  days
                                                      from  SWBT's   Receipt  of
                                                      valid Service Order       


           21+ Lines per Service Order                To Be Negotiated


           (ii)  Interim Number Portability


           1-10  Numbers per Service Order            five (5) business days
                                                      from SWBT's  Receipt of
                                                      valid Service Order


           11-20 Numbers per Service Order            ten  (10)   business  days
                                                      from  SWBT's   Receipt  of
                                                      valid Service Order       


           21+ Numbers per Service Order              To be Negotiated


           (iii) Out-of-Service Repairs               Less than twenty-four (24)
                                                      hours from SWBT's Receipt 
                                                      of Notification of        
                                                      Out-of-Service Condition  
                                                      
                                                      



         29.2 SPECIFIED  PERFORMANCE  BREACH. In recognition of the: (1) loss 
of end user  opportunities,  revenues and goodwill which DTI might sustain in 
the event of a Specified  Performance Breach; (2) the uncertainty,  in the 
event of such a Specified   Performance   Breach, of  DTI  having  available 
to  it  customer opportunities similar to those opportunities currently 
available to DTI; and (3) the  difficulty  of  accurately  ascertaining the 
amount of  damages  DTI would sustain in the event of such a Specified  
Performance Breach, SWBT agrees to pay DTI, subject to Section 29.4 below, 
damages as set forth in Section 29.3 below in the event of the occurrence of a 
Specified Performance Breach.

         29.3 LIQUIDATED DAMAGES.  The damages payable by SWBT to DTI as a 
result of a Specified  Performance Breach shall be $75,000 for each Specified  
Performance Breach  (collectively,  the  "Liquidated  Damages").  DTI  and  
SWBT  agree  and acknowledge  that:  (a) the  Liquidated  Damages are not a 
penalty and have been determined based upon the facts and circumstances of DTI 
and SWBT at the time of the negotiation  and entering into of this  Agreement, 
with due regard given to the  performance   expectations  of  each  Party;  
(b)  the  Liquidated  Damages constitute a reasonable  approximation  of the 
damages DTI would  sustain if its damages were readily ascertainable; and (c) 
DTI shall not be required to provide any proof of the Liquidated Damages.



<PAGE>   36



                                                    GENERAL TERMS AND CONDITIONS
                                                                  DTI - ARKANSAS
                                                                   PAGE 31 OF 42





         29.4  LIMITATIONS.  In no event shall SWBT be liable to pay the  
Liquidated Damages if SWBT's failure to meet or exceed any of the  Performance 
Criteria is caused,  directly or indirectly,  by a Delaying Event. A "Delaying 
Event" means: (a) a  failure  by DTI to  perform  any of its  obligations  set 
forth  in this Agreement (including,  without limitation,  the Implementation  
Schedule and the Joint  Implementation  Process);  (b) any delay, act or 
failure to act by an end user,  agent or  subcontractor  of DTI; (c) any Force 
Majeure Event;  or (d) for INP,  where memory  limitations  in the switch in 
the SWBT serving office cannot accommodate the request.  If a Delaying Event: 
(i) prevents SWBT from performing a Specified  Activity,  then such Specified  
Activity shall be excluded from the calculation of SWBT's  compliance  with 
the Performance  Criteria;  or (ii) only suspends SWBT's ability to timely 
perform the Specified Activity, the applicable time frame in which SWBT's 
compliance with the Performance  Criteria is measured shall be extended on an 
hour-for-hour or day-for-day basis, as applicable, equal to the duration of 
the Delaying Event.

         29.5 SOLE REMEDY.  The  Liquidated  Damages shall be the sole and 
exclusive remedy of DTI for  SWBT's  breach of the  Performance  Criteria  or 
a Specified Performance Breach as described in this Section 29.0 and shall be 
in lieu of any other  damages  or  credit  DTI  might  otherwise  seek for 
such  breach  of the Performance Criteria or a Specified Performance Breach 
through any claim or suit brought under any contract or tariff.

         29.6  RECORDS.  SWBT shall  maintain  complete and accurate  records, 
on a monthly  basis,  of its  performance  under  this  Agreement  of each  
Specified Activity and its compliance with the Performance Criteria. SWBT 
shall provide to DTI such records in a self-reporting format on a monthly 
basis.  Notwithstanding Section  31.6.1,  below,  the Parties  agree that such 
records  shall be deemed "Proprietary Information" under Section 31.6, below.

30.0     REGULATORY APPROVAL

         30.1 The Parties understand and agree that this Agreement will be filed
with the Commission and may thereafter be filed with the FCC. The Parties
believe in good faith and agree that the services to be provided under this
Agreement satisfy the specifically mentioned sections of the Act and are in the
public interest. Each Party covenants and agrees to fully support approval of
this Agreement by the Commission or the FCC under Section 252 of the Act without
modification.

         30.2 The Parties agree that the performance of the terms of this
Agreement will satisfy SWBT's obligation to provide Interconnection under
Section 251 of the Act, and the requirements of the Competitive Checklist, under
Section 271 of the Act. DTI represents that it is, or intends to become, a
provider of Telephone Exchange Service to residential and business subscribers
offered exclusively over its own Telephone Exchange Service facilities or
predominantly over its own Telephone Exchange Service facilities in combination
with the use of unbundled Network Elements purchased from another entity and the
resale of the Telecommunications Services of other carriers.



<PAGE>   37


                                                    GENERAL TERMS AND CONDITIONS
                                                                  DTI - ARKANSAS
                                                                   PAGE 32 OF 42



31.0     MISCELLANEOUS

         31.1   AUTHORIZATION
                
                (a)       SWBT is a corporation duly organized, validly
                          existing and in good standing under the laws of the
                          State of Missouri and has full power and authority
                          to execute and deliver this Agreement and to perform
                          the obligations hereunder.
                
                (b)       DTI is a corporation duly organized, validly
                          existing and in good standing under the laws of the
                          State of Missouri and has full power and authority
                          to execute and deliver this Agreement and to perform
                          its obligations hereunder.
                
 .        31.2   COMPLIANCE AND CERTIFICATION
                
                31.2.1 Each Party shall comply with all federal, state, and
local laws, rules, and regulations applicable to its performance under this
Agreement.

                31.2.2 Each Party warrants that it has obtained all necessary
state certification required in those states in which it has ordered services
from the other Party pursuant to this Agreement. Upon request by any state
governmental entity, each Party shall provide proof of certification.

                31.2.3 Each Party represents and warrants that any equipment,
facilities or services provided to the other Party under this Agreement comply
with the Communications Law Enforcement Act ("CALEA"). Each Party shall
indemnify and hold the other Party harmless from any and all penalties imposed
upon the other Party for such noncompliance and shall at the non-compliant
Party's sole cost and expense, modify or replace any equipment, facilities or
services provided to the other Party under this Agreement to ensure that such
equipment, facilities and services fully comply with CALEA.

         31.3   LAW ENFORCEMENT

                31.3.1 SWBT and DTI shall handle law enforcement requests as
follows:

                    (a)   Intercept   Devices:   Local  and  federal  law
                          enforcement   agencies   periodically   request
                          information or assistance  from local telephone
                          service providers. When either Party receives a
                          request  associated  with  an end  user  of the
                          other Party, it shall refer such request to the
                          Party  that  serves  such end user,  unless the
                          request directs the receiving Party to attach a
                          pen   register,   trap-and-trace   or  form  of
                                 


<PAGE>   38



                                                    GENERAL TERMS AND CONDITIONS
                                                                  DTI - ARKANSAS
                                                                   PAGE 33 OF 42




                          intercept on the Party's  facilities,  in which
                          case that  Party  shall  comply  with any valid
                          request.

                    (b)   Subpoenas: If a Party receives a subpoena for
                          information concerning an end user the Party
                          knows to be an end user of the other Party, it
                          shall refer the subpoena to the requesting
                          party with an indication that the other Party
                          is the responsible company, unless the subpoena
                          requests records for a period of time during
                          which the Party was the end user's service
                          provider, in which case the Party will respond
                          to any valid request.
                    
                    (c)   Emergencies: If a Party receives a request from
                          a law enforcement  agency for temporary  number
                          change, temporary disconnect, or one-way denial
                          of outbound  calls for an end user of the other
                          Party by the  receiving  Party's  switch,  that
                          Party  will  comply  with  an  valid  emergency
                          request.  However,  neither Party shall be held
                          liable for any claims or damages  arising  from
                          compliance  with such requests on behalf of the
                          other  Party's  end user and the Party  serving
                          such end user agrees to indemnify  and hold the
                          other Party  harmless  against any and all such
                          claims.

         31.4 INDEPENDENT  CONTRACTOR.  Each Party and each Party's contractor
shall be solely responsible for the withholding or payment of all applicable 
federal, state and local income taxes, social security taxes and other payroll
taxes with respect to its  employees, as well as any taxes, contributions or
other obligations imposed by applicable state unemployment or workers'
compensation acts.  Each Party has sole authority and responsibility to
hire, fire and otherwise control its employees. 

         31.5 FORCE MAJEURE.  Neither Party shall be liable for any delay or
failure in performance of any part of this Agreement from any cause beyond
its control and without its fault or negligence including, without 
limitation, acts of nature, acts of civil or military authority, government
regulations, embargoes, epidemics, terrorist acts, riots, insurrections,
fires, explosions, earthquakes, nuclear accidents, floods, work stoppages, 
equipment failure, cable cuts, power blackouts, volcanic action, other major
environmental  disturbances,  unusually severe weather conditions, inability
to secure  products or services of other persons or transportation facilities 
or acts or omissions  of  transportation carriers In such event, the Party
affected shall,  upon giving prompt notice to the other Party, be excused from
such performance on a day-to-day  basis to the extent of such interference
(and the other Party shall likewise be excused from performance of its
obligations on a day-for-day basis to the extent such Party's obligations 
related to the performance so interfered  with). The affected Party shall use
its best efforts to avoid or remove the cause of nonperformance  and both
Parties shall proceed to perform with dispatch once the causes are removed or
cease.

         31.6 CONFIDENTIALITY


<PAGE>   39


                                                    GENERAL TERMS AND CONDITIONS
                                                                  DTI - ARKANSAS
                                                                   PAGE 34 OF 42




              31.6.1 All information, including but not limited to 
specifications, microfilm, photocopies, magnetic disks, magnetic tapes,
drawings, sketches, models, samples, tools, technical information, data,
employee records, maps, financial reports, and market data; (i) furnished by one
Party (the "Disclosing Party") to the other Party (the "Receiving Party")
dealing with customer-specific, facility-specific, or usage-specific
information, other than customer information communicated for the purpose of
publication or directory database inclusion, 911, call processing, billing or
settlement or as otherwise mutually agreed upon; or (ii) in written, graphic,
electromagnetic, or other tangible form and marked at the time of delivery as
"Confidential" or "Proprietary;" or (iii) communicated orally and declared to
the Receiving Party at the time of delivery, or by written notice given to the
Receiving Party within ten (10) days after declaration to be "Confidential" or
"Proprietary" (collectively referred to as "Proprietary Information"), shall
remain the property of the Disclosing Party.

              31.6.2 Upon request by the Disclosing Party, the Receiving
Party shall return all tangible copies of Proprietary Information, whether
written, graphic, or otherwise. In the event of the expiration or termination of
this Agreement for any reason whatsoever, each Party shall return to the other
Party or destroy all Proprietary Information and other documents, work papers
and other material (including all copies thereof) obtained from the other Party
in connection with this Agreement.

              31.6.3 Each Party shall keep all the other Party's Proprietary
Information confidential in the same manner in which it keeps its own
Proprietary Information confidential, and shall use the other Party's
Proprietary Information only for performing the covenants contained in the
Agreement and shall disclose such Proprietary Information only to those
employees, contractors, agents or Affiliates who have a need to know. Neither
Party shall use the other Party's Proprietary Information for any other purpose
except upon such terms and conditions as may be agreed upon between the Parties
in writing.

              31.6.4 Unless otherwise agreed, the obligations of 
confidentiality and nonuse set forth in the Agreement do not apply to such
Proprietary Information that:

               (a)      was at the time of receipt, already known to the
                        Receiving Party, free of any obligation to keep
                        confidential and evidenced by written records
                        prepared prior to delivery by the Disclosing Party;

               (b)      is, or becomes publicly known through no wrongful act
                        of the receiving Party;

               (c)      is rightfully received from a third person having no
                        direct or indirect secrecy or confidentiality
                        obligation to the Disclosing Party with respect to
                        such information;




<PAGE>   40





                                                    GENERAL TERMS AND CONDITIONS
                                                                  DTI - ARKANSAS
                                                                   PAGE 35 OF 42



               (d)      is independently developed by an employee, agent, or
                        contractor of the Receiving Party which individual is
                        not involved in any manner with the provision of
                        services pursuant to the Agreement and does not have
                        any direct or indirect access to the Proprietary
                        Information;

               (e)      is  disclosed  to a third  person  by the  Disclosing
                        Party  without  similar  restrictions  on such  third
                        person's rights;

               (f)      is approved for release by written  authorization  of
                        the Disclosing Party;

               (g)      is required to be made public by the Receiving  Party
                        pursuant to  applicable  law or  regulation  provided
                        that the Receiving party shall provide the Disclosing
                        Party with written notice of such requirement as soon
                        as  possible  and  prior  to  such  disclosure.   The
                        Disclosing  Party may then  either  seek  appropriate
                        protective   relief   from   all  or   part  of  such
                        requirement or, if it fails to successfully do so, it
                        shall be deemed to have waived the Receiving  Party's
                        compliance  with  Section 31.6 with respect to all or
                        part of such  requirement.  The Receiving Party shall
                        use all commercially  reasonable efforts to cooperate
                        with the Disclosing Party in attempting to obtain any
                        protective relief which such Disclosing Party chooses
                        to obtain.  Notwithstanding the foregoing, SWBT shall
                        be entitled to disclose confidential information on a
                        confidential   basis  to  regulatory   agencies  upon
                        request for information as to SWBT's activities under
                        the Act.

              31.6.5 Notwithstanding any other provision of this Agreement,
the Proprietary Information provisions of this Agreement shall apply to all
information furnished by either Party to the other in furtherance of the purpose
of this Agreement, even if furnished before the date of this Agreement.

              31.6.6 Pursuant to Section 222(b) of the Act, both parties
agree to limit their use of Proprietary Information received from the other to
the permitted purposed identified in the Act.

         31.7 GOVERNING LAW. For all claims under this Agreement that are 
based upon issues within the jurisdiction  (primary or otherwise) of the FCC, 
the exclusive jurisdiction  and remedy for all such claims shall be as 
provided for by the FCC and the Act.  For all claims  under this  Agreement  
that are based upon  issues within the jurisdiction (primary or otherwise) of 
the Commission,  the exclusive jurisdiction  for all  such  claims  shall  be  
with  such  Commission,  and the exclusive remedy for such claims shall be as 
provided for by such Commission. In all other respects, this Agreement shall 
be governed by the domestic laws of the State of Missouri without reference to 
conflict of law provisions.



<PAGE>   41
                                                    GENERAL TERMS AND CONDITIONS
                                                                    DTI-ARKANSAS
                                                                   PAGE 36 OF 42


       31.8  TAXES

             31.8.1 Each Party purchasing services hereunder shall pay or
otherwise be responsible for all federal, state, or local sales, use, excise,
gross receipts, transaction or similar taxes, fees, or surcharges (hereinafter
"Tax") imposed on or with respect to the services provided by or to such Party,
except for any Tax on either party's corporate existence, status, or income.
Whenever possible, these amounts shall be billed as a separate item on the
invoice. To the extent a sale is claimed to be for resale tax exemption, the
purchasing party shall furnish the providing party a proper resale tax exemption
certificate as authorized or required by statute or regulation by the
jurisdiction providing said resale tax exemption. Failure to timely provide said
resale tax exemption certificate will result in no exemption being available to
the purchasing Party until such time as the purchasing Party presents a valid
certification. Failure to timely provide said resale tax exemption certificate
will result in no exemption being available to the purchasing Party until such
time as the purchasing Party presents a valid certificate.

             31.8.2 With respect to any purchase of services, facilities or
other arrangements, if any Tax is required or permitted by applicable law to be
collected from the purchasing party by the providing party, then: (i) the
providing party shall bill the purchasing party for such Tax; (ii) the
purchasing party shall remit such Tax to the providing party; and (iii) the
providing party shall remit such collected Tax to the applicable taxing
authority.

             31.8.3 With respect to any purchase hereunder of services,
facilities or arrangements that are resold to a third party, if any Tax is
imposed by applicable law on the end user in connection with any such purchase,
then: (i) the purchasing party shall be required to impose and/or collect such
Tax from the end user; and (ii) the purchasing party shall remit such Tax to the
applicable taxing authority. The purchasing party agrees to indemnify and hold
harmless the providing party on an after-tax basis for any costs incurred by the
providing party as a result of actions taken by the applicable taxing authority
to collect the Tax from the providing party due to the failure of the purchasing
party to pay or collect and remit such tax to such authority.

             31.8.4 If the providing party fails to collect any Tax as
required herein, then, as between the providing party and the purchasing party:
(i) the purchasing party shall remain liable for such uncollected Tax; and (ii)
the providing party shall be liable for any penalty and interest assessed with
respect to such uncollected Tax by such authority. However, if the purchasing
party fails to pay any taxes properly billed, then, as between the providing
party and the purchasing party, the purchasing party will be solely responsible
for payment of the taxes, penalty and interest.

             31.8.5 If the purchasing party fails to impose and/or collect
any Tax from end users as required herein, then, as between the providing party
and the purchasing party, the purchasing party shall remain liable for such
uncollected Tax and any interest and penalty assessed thereon with respect to
the uncollected Tax by the applicable taxing authority. With 




<PAGE>   42



                                                    GENERAL TERMS AND CONDITIONS
                                                                  DTI - ARKANSAS
                                                                   PAGE 37 OF 42




respect  to any Tax that the  purchasing  party  has  agreed to pay or impose on
and/or collect from end users, the purchasing party agrees to indemnify and hold
harmless the providing party on an after-tax basis for any costs incurred by the
providing party as a result of actions taken by the applicable  taxing authority
to collect the Tax from the providing Party due to the failure of the purchasing
party to pay or collect and remit such Tax to such authority.

         31.9 NON-ASSIGNMENT.  This Agreement shall be binding upon every 
subsidiary and  Affiliate of either Party that is engaged in providing  
Telephone  Exchange and Exchange Access services in any territory  within 
which SWBT is an Incumbent Local Exchange  Carrier as of the date of this 
Agreement (the "SWBT  Territory") and shall  continue  to be  binding  upon 
all such  entities  regardless  of any subsequent change in their ownership.  
Each Party covenants that, if it sells or otherwise  transfers to a third 
Party its Telephone Exchange and Exchange Access network facilities within the 
SWBT Territory, or any portion thereof, to a third party, it will require as a 
condition of such transfer that the transferee agree to be bound  by this  
Agreement  with  respect  to  services  provided  over the transferred 
facilities.  Except as provided in this paragraph, neither Party may assign or 
transfer (whether by operation of law or otherwise) this Agreement (or any 
rights or obligations  hereunder) to a third party without the prior written 
consent of the other Party;  provided that each Party may assign this  
Agreement to a  corporate  Affiliate  or an entity  under its common  control 
or an entity acquiring all or  substantially  all of its assets or equity by 
providing prompt written notice to the other Party of such assignment or 
transfer.  Any attempted assignment or transfer that is not permitted is void 
ab initio. Without limiting the generality of the foregoing,  this Agreement 
shall be binding upon and shall inure to the benefit of the Parties' 
respective successors and assigns.

         31.10  NON-WAIVER.  Failure of either Party to insist on performance 
of any term or  condition  of this  Agreement  or to  exercise  any right or  
privilege hereunder  shall not be construed as a continuing or future waiver 
of such term, condition, right or privilege.

         31.11 AUDITS.  Each Party to this  Agreement  will be  responsible  
for the accuracy  and  quality  of its  data  as  submitted  to the  
respective  Parties involved.

              31.11.1 Upon reasonable written notice and at its own expense,
each Party or its authorized representative (providing such authorized
representative does not have a conflict of interest related to other matters
before one of the Parties) shall have the right to conduct an audit of the other
Party to give assurances of compliance with the provisions of this Agreement;
provided, that neither Party may request more than two (2) such audits within
any twelve (12) month period. This includes on-site audits at the other Party's
or the Party's vendor locations. Each Party, whether or not in connection with
an audit, shall maintain reasonable records for a minimum of twenty-four (24)
months and provide the other Party with reasonable access to such information as
is necessary to determine amounts receivable or payable under this Agreement.
Each Party's right to access information for audit purposes is limited to data
not in excess of twenty-four (24) months in age.




<PAGE>   43
                                                    GENERAL TERMS AND CONDITIONS
                                                                  DTI - ARKANSAS
                                                                   PAGE 38 OF 42




         31.12    DISPUTED AMOUNTS.

                  31.12.1 No claims, under this Agreement or its Appendices,
shall be brought for disputed amounts more than twenty-four (24) months from the
date of occurrence which gives rise to the dispute. Under this Section 30.12, if
any portion of an amount due to a Party (the "Billing Party") under this
Agreement is subject to a bona fide dispute between the Parties, the Party
billed (the "Non-Paying Party") shall within sixty (60) days of its receipt of
the invoice containing such disputed amount give notice to the Billing Party of
the amounts it disputes ("Disputed Amounts") and include in such notice the
specific details and reasons for disputing each item. The Non-Paying Party shall
pay when due: (i) all undisputed amounts to the Billing Party; and (ii) all
Disputed Amounts to Billing Party.

                  31.12.2 If the Parties are unable to resolve the issues
related to the Disputed Amounts in the normal course of business within sixty
(60) days after delivery to the Billing Party of notice of the Disputed Amounts,
each of the Parties shall appoint a designated representative who has authority
to settle the dispute and who is at a higher level of management than the
persons with direct responsibility for administration of this Agreement. The
designated representatives shall meet as often as they reasonably deem necessary
in order to discuss the dispute and negotiate in good faith in an effort to
resolve such dispute.

                  31.12.3 If the Parties are unable to resolve issues related
to the Disputed Amounts within forty-five (45) days after the Parties'
appointment of designated representatives pursuant to Section 31.12.2, above,
then either Party may file a complaint with the Commission to resolve such
issues or proceed with any other remedy pursuant to law or equity. The
Commission may direct release of any or all funds (including any accrued
interest) in the escrow account, plus applicable late fees, to be paid to either
Party.

                  31.12.4 The Parties agree that all negotiations pursuant to
this Section 31.12 shall remain confidential and shall be treated as compromise
and settlement negotiations for purposes of the Federal Rules of Evidence and
state rules of evidence.

                  31.12.5 Any undisputed amounts not paid when due shall accrue
interest from the date such amounts were due at the lesser of: (i) one and
one-half percent (1-1/2%) per month; or (ii) the highest rate of interest that
may be charged under applicable law.

         31.13    DISPUTE RESOLUTION.

                  31.13.1 No claims shall be brought for disputes arising under
this Agreement or its Appendices more than twenty-four (24) months from the date
of occurrence which gives rise to the dispute.

                  31.13.2 For disputes other than disputed amounts under this
Agreement or its Appendices, each Party shall appoint a designated
representative as set forth in Section 31.12.2, above, and if unable to resolve
the dispute, proceed as set forth in Section 31.12.3, above.




<PAGE>   44




                                                    GENERAL TERMS AND CONDITIONS
                                                                  DTI - ARKANSAS
                                                                   PAGE 39 OF 42



     31.14  NOTICES.  Any notice to a Party  required  or  permitted  under this
Agreement  shall be in writing and shall be deemed to have been  received on the
date of service if served  personally;  on the date receipt is  acknowledged  in
writing by the  recipient if delivered by regular mail; or on the date stated on
the receipt if delivered by certified or registered mail or by a courier service
that obtains a written receipt. Notice may also be provided by facsimile,  which
shall be effective on the next Business Day  following the date of  transmission
as reflected in the  facsimile  confirmation  sheet.  "Business  Day" shall mean
Monday through Friday, SWBT/DTI holidays excepted. Any notice shall be delivered
using one of the alternatives mentioned in this section and shall be directed to
the  applicable  address  indicated  below or such  address  as the  Party to be
notified has designated by giving notice in compliance with this section, except
that  notices to a Party's  twenty-four  (24) hour  contact  number  shall be by
telephone and/or facsimile and shall be deemed to have been received on the date
transmitted.

<TABLE>

<S>                                                     <C>                             <C>                                       
NOTICE CONTACT                                           DTI CONTACT                     SWBT CONTACT

NAME/TITLE                                               Richard Weinstein               Jeffrey Fields

STREET ADDRESS                                           11111 Dorsett Rd.               One Bell Plaza, 525.07

CITY, STATE, ZIP CODE                                    St. Louis, MO 63043             Dallas, TX 75202

TELEPHONE NUMBER                                         314-253-6600                    214-464-5676

FAX NUMBER                                               314-253-6699                    214-464-1486


24-HOUR NETWORK MGMT CONTACT                             DTI CONTACT                     SWBT CONTACT

NAME/TITLE                                                                               NSMC Control

TELEPHONE NUMBER                                                                         1-800-792-2662

FAX NUMBER
</TABLE>


     31.15  PUBLICITY AND USE OF TRADEMARKS OR SERVICE MARKS.

            31.15.1 The Parties agree not to use in any advertising or
sales promotion, press releases, or other publicity matters any endorsements,
direct or indirect quotes, or pictures implying endorsement by the other Party
or any of its employees without such Party's prior written approval. The Parties
will submit to each other for written approval, prior to publication, all
publicity matters that mention or display one another's name and/or marks or
contain language from which a connection to said name and/or marks may be
inferred or implied; the Party to whom a request is directed shall respond
promptly. Nothing herein, however, shall be construed as preventing either Party
from publicly stating the fact that it has executed this Agreement with the
other Party.

            31.15.2 Nothing in this Agreement shall grant, suggest, or imply
any authority for one Party to use the name, trademarks, service marks, or
trade names of the other for commercial purposes without prior written
approval.  




<PAGE>   45




                                                    GENERAL TERMS AND CONDITIONS
                                                                  DTI - ARKANSAS
                                                                   PAGE 40 OF 42




     31.16 SECTION 252(i) OBLIGATIONS.  If either Party enters into an agreement
(the "Other  Agreement")  approved by the  Commission or FCC pursuant to Section
252 of the Act  (regardless of whether the approved  agreement was negotiated or
arbitrated)  which  provides for the provision of  arrangements  covered in this
Agreement  to  another  requesting   Telecommunications  Carrier,  including  an
Affiliate,  such Party shall make available to the other Party such arrangements
upon the same  rates,  terms  and  conditions  as those  provided  in the  Other
Agreement.  At its sole option,  the other Party may avail itself of either: (i)
the Other Agreement in its entirety; or (ii) the prices, terms and conditions of
the Other  Agreement  that directly  relate to any of the following  duties as a
whole:

         (a)      Interconnection   -   Section   251(c)(2);    252(d)(1);   and
                  271(c)(2)(B(i) of the Act; or

         (b)      Exchange Access - Section  251(c)(2) and  271(c)(2)(B)(ii)  of
                  the Act; or

         (c)      Unbundling - Section  251(c)(3)  and  271(c)(2)(B)(ii)  of the
                  Act; or

         (d)      Resale - Section 251(c)(4) and  271(c)(2)(B)(xiv)  of the Act;
                  or

         (e)      Collocation  - Section  251(c)(6) and  271(c)(2)(B)(i)  of the
                  Act; or

         (f)      Number Portability - Section 251(b)(2) and 271(c)(2)(B)(xi) of
                  the Act; or

         (g)      Database Access - Section 271(c)(2)(B)(x) of the Act; or

         (h)      Access   to   Rights   of   Way  -   Section   251(b)(4)   and
                  271(c)(2)(B)(iii) of the Act; or

         (i)      Operator Services - Section 271(c)(2)(B)(vii)(III); or

         (j)      Directory Assistance - Section 271(c)(2)(B)(vii)(II).

     31.17 JOINT WORK PRODUCT.  This  Agreement is the joint work product of the
Parties and has been negotiated by the Parties and their respective  counsel and
shall be fairly  interpreted  in accordance  with its terms and, in the event of
any ambiguities, no inferences shall be drawn against either Party.

     31.18  INTERVENING  LAW. This Agreement is entered into as a result of both
private  negotiation  between the Parties and the  incorporation  of some of the
results of arbitration by the Commission.  If the actions of Arkansas or federal
legislative  bodies,  courts, or regulatory  agencies of competent  jurisdiction
invalidate, modify, or stay the enforcement of laws or regulations that were the
basis for a provision of the contract  which is  reflective  of the  Arbitration
Award approved by the Commission,  the affected  provision shall be invalidated,
modified, or stayed,  consistent with the action of the legislative body, court,
or regulatory  agency.  In such event, the Parties shall expend diligent efforts
to arrive at an agreement  respecting the  modifications  to the  Agreement.  If
negotiations fail, disputes between the Parties 




<PAGE>   46





                                                    GENERAL TERMS AND CONDITIONS
                                                                  DTI - ARKANSAS
                                                                   PAGE 41 OF 42



concerning the interpretation of the actions required or provisions  affected by
such governmental  actions shall be resolved pursuant to the dispute  resolution
process provided for in this Agreement. The invalidation,  stay, or modification
of the pricing  provisions  of the FCC's First Report and Order in CC Docket No.
96-98  (August 8, 1996) and the FCC's Order on  Reconsideration  (September  27,
1996) shall not be considered an invalidation,  stay, or modification  requiring
changes to provisions of the Agreement  required by the  Commission  Arbitration
Award,  in that the FCC's pricing  provisions  are not the basis for the costing
and pricing provisions of the Commission's Arbitration Award.

     31.19 NO THIRD PARTY BENEFICIARIES; DISCLAIMER OF AGENCY. This Agreement is
for the sole  benefit of the Parties and their  permitted  assigns,  and nothing
herein express or implied shall create or be construed to create any third-party
beneficiary rights hereunder. Except for provisions herein expressly authorizing
a Party to act for another,  nothing in this Agreement shall  constitute a Party
as a legal  representative  or agent of the other Party,  nor shall a Party have
the  right or  authority  to  assume,  create  or  incur  any  liability  or any
obligation of any kind, express or implied,  against or in the name or on behalf
of the other Party  unless  otherwise  expressly  permitted by such other Party.
Except as otherwise expressly provided in this Agreement, no Party undertakes to
perform any obligation of the other Party, whether regulatory or contractual, or
to assume any responsibility for the management of the other Party's business.

     31.20 NO  LICENSE.  No  license  under  patents,  copyrights  or any  other
intellectual  property  right (other than the limited  license to use consistent
with the terms,  conditions and  restrictions  of this  Agreement) is granted by
either  Party or shall be  implied  or arise by  estoppel  with  respect  to any
transactions contemplated under this Agreement.

     31.21  SURVIVAL.  The Parties'  obligations  under this Agreement  which by
their nature are intended to continue  beyond the  termination  or expiration of
this Agreement shall survive the termination or expiration of this Agreement.

     31.23 SCOPE OF AGREEMENT. This Agreement is intended to describe and enable
specific Interconnection and compensation arrangements between the Parties. This
Agreement  does  not  obligate   either  Party  to  provide   arrangements   not
specifically provided herein.

     31.24  ENTIRE  AGREEMENT.  The terms  contained in this  Agreement  and any
Schedules,  Exhibits,  Appendices,  tariffs and other  documents or  instruments
referred  to  herein,  which  are  incorporated  into  this  Agreement  by  this
reference,  constitute the entire agreement  between the Parties with respect to
the subject matter hereof,  superseding all prior understandings,  proposals and
other  communications,  oral or  written.  Neither  Party  shall be bound by any
preprinted  terms  additional to or different  from those in this Agreement that
may appear  subsequently in the other Party's form documents,  purchase  orders,
quotations,  acknowledgments,  invoices or other communications.  This Agreement
may only be modified by a writing signed by an officer of each Party.



<PAGE>   47
                                                    GENERAL TERMS AND CONDITIONS
                                                                  DTI - ARKANSAS
                                                                   PAGE 42 OF 42




IN WITNESS WHEREOF, the Parties hereto have caused this Agreement to be executed
as of this 21 day of AUGUST, 1997.

DIGITAL TELEPORT, INC.                    SOUTHWESTERN BELL TELEPHONE COMPANY
                                       
                                       
Signature: /s/ J. W. Sheehy                  Signature: /s/ Larry B. Cooper
          ------------------------                    -----------------------
                                       
Name:       J.W. Sheehy                   Name:       Larry B. Cooper
       ---------------------------                    -----------------------
           (Print or Type)                              (Print or Type)
                                       
Title:  Vice President IC Support         Title: General  Manager-Competitive  
       ---------------------------                 Provider  Account Team
             (Print or Type)                     ----------------------------
                                                       (Print or Type)
                                       

<PAGE>   48
                                                                    APPENDIX 800
                                                                     Page 2 of 7

                                  APPENDIX 800

                    ACCESS TO THE TOLL FREE CALLING DATABASE

This Appendix sets forth the terms and conditions under which SWBT provides
Access to the Toll Free Calling Database.

I.       DESCRIPTION

         A.       SWBT's 800 database, an ANSI SS7 call-related database system,
                  receives updates processed from the national Service
                  Management System (SMS). Customer records in the SMS are
                  created or modified by entities known as Responsible
                  Organizations (RespOrg) who obtain access to the SMS via the
                  800 Service Management System, Tariff F.C.C. No. 1. 800
                  Service Providers must either become their own RespOrg or use
                  the services of an established RespOrg. The services of a
                  RespOrg includes creating and updating 800 records in the SMS
                  to download in the 800 database(s). SWBT does not, either
                  through a tariff or contract, provide RespOrg service.

         B.       After the 800 customer record is created in the SMS, the SMS
                  downloads the records to the appropriate databases, depending
                  on the area of service chosen by the 800 subscriber. An 800
                  customer record is created in the SMS for each 800 number to
                  be activated. The SMS initiates all routing changes to update
                  information on a nationwide basis.

         C.       Access to the Toll Free Calling Database allows an LSP to
                  access SWBT's 800 database for the purpose of switch query and
                  database response. Access to the Toll Free Calling Database
                  supports the processing of toll free calls (e.g., 800 and 888)
                  where identification of the appropriate carrier (800 Service
                  Provider) to transport the call is dependent upon the full ten
                  digits of the toll free number (e.g., 1+800+NXX+XXXX). Access
                  to the Toll Free Calling Database includes all 800-type
                  dialing plans (i.e., 800 and 888 [and 877, 866, 855, 844, 833,
                  822, when available]).

         D.       Access to the Toll Free Calling Database provides the carrier
                  identification function required to determine the appropriate
                  routing of an 800 number based on the geographic origination
                  of the call, from a specific or any combination of NPA/NXX,
                  NPA or LATA.

         E.       There are three optional features available with 800 service:
                  Designated 10-Digit Translation, Call Validation and Call
                  Handling and Destination.

                  1.     The Designated  10-Digit  Translation feature converts 
                         the 800 number into a designated  10-digit number.  If
                         the 800 Service


<PAGE>   49


                                                                    APPENDIX 800
                                                                     Page 3 of 7


                         Provider provides the designated 10-digit number
                         associated with the 800 number and requests delivery of
                         the designated 10-digit number in place of the 800
                         number, SWBT will deliver the designated 10-digit
                         number.

                  2.     The Call Validation feature limits calls to an 800
                         number to calls originating only from an 800
                         Subscriber's customized service area. Calls originating
                         outside the area will be screened and an out of band
                         recording will be returned to the calling party.

                  3.     The Call Handling and Destination feature allows
                         routing of 800 calls based on one or any combination of
                         the following: time of day, day of week, percent
                         allocation and specific 10 digit ANI.

II.      TERMS AND CONDITIONS

         A.       Access to the Toll Free Calling Database provided under these
                  terms and conditions is only available for use in the
                  provision of telephone exchange and exchange access
                  telecommunications services as specified in the
                  Telecommunications Act of 1996 and any effective rules and
                  regulations of the Federal Communications Commission and the
                  state Public Service Commission.

         B.       Access to the Toll Free Calling Database is offered separate
                  and apart from other unbundled network elements necessary for
                  operation of the network routing function addressed in these
                  terms and conditions, e.g., end office 800 SSP functionality
                  and CCS/SS7 signaling. This appendix is separate from the
                  prices, terms, conditions and billing for such related
                  elements, and in no way shall this appendix be construed to
                  circumvent the prices, terms, conditions or billing as
                  specified for such related elements.

         C.       LSP shall address its queries to SWBT's database to the alias
                  point code of the STP pair identified by SWBT. LSP's queries
                  shall use subsystem number 0 in the calling party address
                  field and a translations type of 254 with a routing indicator
                  set to route on global title. LSP acknowledges that such
                  subsystem number and translation type values are necessary for
                  SWBT to properly process queries to its 800 database.

         D.       Each Party warrants to the other that it shall send queries
                  and SS7 messages conforming to the ANSI approved standards for
                  SS7 protocol and pursuant to the Specifications and Standards
                  documents attached and incorporated herein in Exhibit I. Both
                  Parties acknowledge that transmission in said protocol is
                  necessary for each Party to provision Access to the Toll Free
                  Calling Database (or the equivalent thereof). Each Party
                  reserves the right to modify its network pursuant to other

<PAGE>   50


                                                                    APPENDIX 800
                                                                     Page 4 of 7

                  specifications and standards, which may include Bellcore
                  Specifications defining specific service applications, message
                  types and formats, that may become necessary to meet the
                  prevailing demands within the U.S. telecommunications
                  industry. All such changes shall be announced in accordance
                  with the then prevailing industry standard procedures. Each
                  party shall work cooperatively to coordinate any necessary
                  changes.

         E.       LSP acknowledges and agrees that CCS/SS7 network overload due
                  to extraordinary volumes of queries and/or other SS7 network
                  messages can and will have a detrimental effect on the
                  performance of SWBT's CCS/SS7 network and its 800 database.
                  LSP further agrees that SWBT, at its sole discretion, may
                  employ certain automatic and/or manual overload controls
                  within SWBT's CCS/SS7 network to guard against these
                  detrimental effects. SWBT shall report to the LSP any
                  instances where overload controls are invoked due to the LSP's
                  CCS/SS7 network. LSP shall take immediate, corrective actions
                  as are necessary to cure the conditions causing the overload
                  situation.

         F.       During periods of 800 database system congestion, SWBT shall
                  utilize an automatic code gapping procedure to control
                  congestion that may affect the service of all customers of
                  SWBT's 800 database. The automatic code gapping procedure used
                  by SWBT shall tell LSP's switch the gap (how long LSP's switch
                  should wait before sending another query) and the duration
                  (how long the switch should continue to perform gapping). For
                  example, during an overload condition, the automatic code
                  gapping procedure shall tell SWBT's 800 database when to begin
                  to drop one out of three queries received. This code gapping
                  procedure shall be applied uniformly to all users of SWBT's
                  800 database. SWBT reserves the right to manually invoke the
                  automatic code gapping procedure to control congestion.

         G.       Prior to SWBT initiating service under this Appendix, LSP
                  shall provide an initial forecast of busy hour query volumes.
                  LSP shall update its busy hour forecast for each upcoming
                  calendar year (January - December) by October 1 of the
                  preceding year. LSP shall provide such updates each year for
                  the first three (3) years of this Appendix. If, prior to the
                  establishment of a mutually agreeable service effective date,
                  in writing, SWB, at its discretion, determines that it lacks
                  adequate processing capability to provide Access to the Toll
                  Free Calling Database to LSP, SWBT shall notify LSP of SWBT's
                  intent not to provide the services under this Appendix and
                  this Appendix will be void and have no further effect.

         H.       LSP shall from time to time at SWBT's request, provide
                  additional forecasted information as deemed necessary by SWBT
                  for network planning in connection with this offering.


<PAGE>   51


                                                                    APPENDIX 800
                                                                     Page 5 of 7

         I.      SWBT shall test the Access to the Toll Free Calling Database in
                 conjunction with CCS/SS7 Interconnection Service (e.g., SS7
                 Appendix) as outlined in Bellcore Technical References
                 TR-NWT-000533, TR-NWT-000954, TR-TSV-000905, and TP 76638.

         J.      LSP shall only use Access to the Toll Free Calling Database to
                 determine the routing requirements for originating 800 calls.
                 Neither the LSP nor carrier customers of the LSP if the LSP is
                 acting on behalf of other carriers, shall use the database
                 information to copy, store, maintain or create any table or
                 database of any kind or for any purpose. If the LSP acts on
                 behalf of other carriers to access SWBT's Toll Free Calling
                 Database, LSP shall prohibit such carriers from copying,
                 storing, maintaining, or creating any table or database of any
                 kind from any response provided by SWBT after a query to SWBT's
                 Toll Free Calling Database. LSP shall only use this network
                 element in connection with the provision of telephone exchange
                 and exchange access services.

         K.      LSP shall ensure that it has sufficient link capacity and
                 related facilities to handle its signaling and toll free
                 traffic without adversely affecting other network subscribers.

         L.      SWBT shall provide Access to the Toll Free Calling Database as
                 set forth in this Appendix only as such elements are used for
                 LSP's activities on behalf of its Arkansas local service
                 customers where SWBT is the incumbent local exchange carrier.
                 LSP agrees that any other use of SWBT's Toll Free Calling
                 Database for the provision of 800 database service by LSP will
                 be pursuant to the terms, conditions, rates, and charges of
                 SWBT's effective tariffs, as revised, for 800 database
                 services.

         M.      This Appendix shall become effective on _______________________
                 and shall continue for one (1) year from the effective date of
                 implementation of Access to the Toll Free Calling Database.
                 Thereafter, this Appendix shall remain in effect unless
                 terminated by either party upon written notice given sixty (60)
                 days in advance of the termination date.

         N.      Ordering and billing inquiries for the elements described
                 herein shall be directed to the Local Service Provider Service
                 Center (LSPSC). Ordering shall be done through the LSPSC using
                 the standard LSP order form and SWBT CCS7-2 Form, if
                 applicable.

III.     RATE REGULATIONS

         A.      LSP shall pay a Local Service Order Request Charge for each LSP
                 request for service order activity to establish Access to the
                 Toll Free Calling Database.


<PAGE>   52


                                                                    APPENDIX 800
                                                                     Page 6 of 7

         B.      LSP shall pay the rates for Access to the Toll Free Calling
                 Database, as described in Section III D. These rates and
                 charges will apply for one (1) year from the service effective
                 date for each exchange. After one (1) year, SWBT may change the
                 rates upon sixty (60) days' notice. SWBT may first give such
                 notice sixty days before the end of the first year.

         C.      LSP shall pay a nonrecurring charge when an LSP establishes or
                 changes a signaling point code. The rates and charges for
                 Signaling Point Code(s) are described in the SS7 Appendix.
                 This charge also applies to point code information provided by
                 LSPs allowing other telecommunications providers to use the
                 LSP's SS7 signaling network.

         D.      Prices for the four rate elements associated with Access to 
                 the Toll Free Calling Database are as follows:

                  1.  Toll Free Database Query Rate Element            $0.001020
                  2.  Designated 10-Digit Translation Rate Element            NC
                  3.  Call Validation Rate Element                            NC
                  4.  Call Handling and Destination Rate Element       $0.000140

         E.       LSP shall pay the Toll Free Database query rate for each query
                  received and processed by SWB's database. When applicable, the
                  charge for the additional features (Designated 10-Digit
                  Translation, Call Validation and Call Handling and
                  Destination) are per query and in addition to the Toll Free
                  Database query charge, and will also be paid by LSP.

IV.      MONTHLY BILLING

         SWBT shall render monthly billing statements to the LSP, and 
         remittance in full will be due within thirty (30) days of receipt.

<PAGE>   53


                                                                    APPENDIX 800
                                                                     Page 7 of 7

                                  APPENDIX 800
                                    EXHIBIT I



                          SPECIFICATIONS AND STANDARDS


Description of Subject Area
and Issuing Organization                             Document Number
- ----------------------------                         ---------------
Bellcore, SS7 Specifications

                                                     TR-NWT-000246


                                                     TR-NWT-000271


                                                     TR-NWT-000533


Bellcore, CCS Network Interface Specifications

                                                     TR-TSV-000905

                                                     TP 76638

                                                     TR-NWT-000954


<PAGE>   54


                                                              APPENDIX 991- MOKA
                                                                     Page 2 of 4


                             APPENDIX 911 - ARKANSAS

                  Terms and Conditions for Providing Connection
                   to E911 Universal Emergency Number Service



This appendix between SWBT and LSP sets forth the terms and conditions upon
which SWBT will provide LSP's connection to E911 Universal Emergency Number
Service.

DEFINITIONS

The following definition is in addition to those in the Arkansas General
Exchange Tariffs referenced below:

         Independent Exchange Company (IEC): A local exchange telephone company,
         including Local Service Providers (LSPs) who are certified by the state
         commission, other than Southwestern Bell Telephone Company. An IEC may
         also be a customer for Universal Emergency Number Service in order to
         provide that service or elements of that service to legally authorized
         agencies within the IEC's serving area.


TERMS AND CONDITIONS

The following is in addition to those terms and conditions in the Arkansas
General Exchange Tariff referenced below:

         The Universal Emergency Number Service may be provided by Southwestern
         Bell Telephone Company or jointly by Southwestern Bell Telephone
         Company and an IEC.

         SWBT shall provide LSP with a file containing the Master Street Address
         Guide (MSAG) for the exchanges or communities specified in Exhibit I,
         in accordance with the methods and procedures described in the document
         "Operating Methods for Downloading and Maintaining End User Records in
         SWBT's DBMS". SWBT shall provide LSP additional files with the entire
         MSAG, including subsequent additions or updates to the MSAG in
         accordance with the intervals specified in Exhibit I. In addition, SWBT
         shall provide LSP with a statistical report in a timely fashion and in
         accordance with the methods and procedures described in the above
         mentioned document, for each file downloaded by LSP to SWBT's DBMS, so
         that LSP may ensure the accuracy of the end user records. LSP will
         attest it has been provided a copy of the document referenced above.


<PAGE>   55


                                                              APPENDIX 991- MOKA
                                                                     Page 3 of 4

         At a reasonable time prior to the establishment of E911 Service, LSP
         shall download and maintain thereafter all information required to
         establish records necessary for furnishing connection to E911 Service
         and shall promptly notify SWBT in writing of any changes to be made to
         such records. LSP shall adopt and comply with operating methods
         applicable to downloading and maintaining LSP's end user records in
         SWBT's DBMS, as set forth in the document referenced in the paragraph
         above.

         LSP acknowledges that its end users in a single local calling scope may
         be served by different PSAPs, and LSP shall be responsible for
         providing facilities to route calls from its end users to the proper
         E911 Control Office(s).

         LSP shall connect its switches to the E911 Control Office by one-way
         outgoing CAMA trunks dedicated for originating 911 emergency service
         calls.

         The parties agree that the E911 service is provided for the use of the
         E911 Customer, and recognizes the authority of the E911 Customer to
         establish service specifications and grant final approval (or denial)
         of service configurations offered by SWBT and the LSP. The terms and
         conditions of this appendix represent a plan for providing E911
         service, for which LSP must obtain documentation of approval from the
         appropriate E911 Customer(s) which have jurisdiction in the area(s) in
         which LSP's customers are located. LSP shall provide such documentation
         to SWBT prior to the use of LSP's E911 connection for actual emergency
         calls.

         Both parties agree to designate a representative who shall have the
         authority to execute additional exhibits to this Appendix when
         necessary to accommodate expansion of the geographic area of LSP into
         the jurisdiction of additional PSAPs or to increase the number of CAMA
         trunks. The designated representative for SWBT is Jeff Fields and for
         LSP is Richard Weinstein.

         The terms and conditions of this appendix are subject to renegotiation
         in the event that the E911 Customer orders changes to the E911 service
         that necessitate revision of this appendix.


RATES, TERMS AND CONDITIONS

E911 Universal Emergency Number Service will be provided utilizing the rates,
terms and conditions set forth in the following Arkansas tariff, in addition to
those terms and conditions described previously in this Appendix:

         SWBT's General Exchange Tariff Section 44 - Universal Emergency Number 
         Service (911)


<PAGE>   56
                                                              APPENDIX 991- MOKA
                                                                     Page 4 of 4

                         EXHIBIT 1 TO APPENDIX 9-1-1

<TABLE>
<CAPTION>
                    LSP SERVING AREA DESCRIPTION AND E9-1-1
                            INTERCONNECTION DETAILS

<S>                           <C>                 <C>                         <C>                   <C>
LSP NAME & CONTACTS            LSP "OCN"           LSP Switch Name & Addr.         Switch Type      LSP NPA/NXX(s) included

                                                                                     CLLI Code        # 9-1-1 Trunks Requested
E9-1-1 Manager                 LSP Telco ID
                                                                               "Connect Signal" Digits (4)           "Default" PSAP
                                                                                      1 - 1

Database Administrator                              Estimated # of EAAs             ETST Code

                               LSP Service Area Definition:
Switch Site Contact



SWBT E9-1-1 SYSTEM CONFIGURATION ASSOCIATED
WITH DESIGNATED E9-1-1 CONTROL OFFICE

E9-1-1 CONTROL OFFICE:                       PSAPs INCLUDED IN                COMMUNITY             E9-1-1 CUSTOMER and
       CLLI Code:                            9-1-1 SERVICE PLAN               for MSAG PULL (3)     AGENCY TYPE (see legend below)

E9-1-1 Features Required:

# of 9-1-1 Trunks from LSP:

   MSAG Update Interval:           Monthly




   FOOTNOTES:  (1)


               (2)


               (3)  MSAG will only include
                    addresses within SWBT
                    exchanges, unless
                    specifically stated otherwise.

               (4)  Refer to network
                    interface specifications
                    in Exhibit III.

"TYPE of AGENCY" LEGEND:
             HRC    =   Home Rule City
             ECD    =   Emergency  Communications District
             COG    =   Council of Governments or Regional
                        Planning Commission
             GLC    =   General Law City
             Cnty   =   County with special
                        provisions (only applies
                        to Dallas County)


                                                            Date Prepared

</TABLE>
                                     PAGE 1


<PAGE>   57


                                                                    APPENDIX AIN
                                                                     Page 2 of 2


                                  APPENDIX AIN

                            AIN CALL RELATED DATABASE

AIN is a Network Architecture that uses distributed intelligence in centralized
databases to control call processing and manage network information, rather than
performing those functions at every switch.

SWBT will provide LSP access to the SWBT's Service Creation Environment (SCE) to
design, create, test and deploy AIN-based features, equivalent to the access it
provides to itself, providing that security arrangements can be made. LSP
requests to use the SWBT SCE will be subject to request and review procedures to
be agreed upon by the Parties.

When LSP utilizes SWBT's Local Switching network element and requests SWBT to
provision such network element with a technically feasible AIN trigger, SWBT
will provide access to the appropriate AIN Call Related Database for the purpose
of invoking either an SWBT AIN feature or a LSP developed AIN feature as per
previous section.

When LSP utilizes its own local switch, SWBT will provide access to the
appropriate AIN Call Related Database for the purpose of invoking either an SWBT
AIN feature or a LSP developed AIN feature as per previous section.

SWBT will provide access to AIN Call Related databases in a nondiscriminatory
and competitively neutral manner. Any mediation, static or dynamic, will only
provide network reliability, protection, security and network management
functions consistent with the access service provided. Any network management
controls found necessary to protect the AIN SCP from an overload condition will
be applied based on non-discriminatory guidelines and procedures either (1)
resident in the SWBT STP that serves the appropriate AIN SCP or (2) via manual
controls that are initiated from SWBT Network Elements. Such management controls
will be applied to the specific problem source, where ever that source is,
including SWBT, and not to all services unless a problem source cannot be
identified.

As requested by LSP, SWBT will provide specifications and information reasonably
necessary for LSP to utilize SWBT SCE as provided above.

SWBT SCP will partition and take reasonable steps to protect LSP service logic
and data from unauthorized access, execution or other types of compromise, where
technically feasible.


<PAGE>   58


                                                                    APPENDIX BCR
                                                                     Page 2 of 5

                                  APPENDIX BCR
                        BILLING, COLLECTING AND REMITTING

This Appendix sets forth the terms and conditions that apply to those
telecommunications services for which charges are billed and collected by one
Local Exchange Carrier (LEC) or LSP but earned by another LEC; and to establish
procedures for the billing, collecting and remitting of such charges and for
compensation for the services performed in connection with the billing,
collecting and remitting of such charges.

I.    DEFINITIONS

      A.   BellCore Client Company Calling Card and Third Number Settlement (BCC
           CATS) System - Nationwide system used to produce information reports
           that are used in the settlement of LEC revenues recorded by one BCC
           (or LEC) and billed to an end user of another BCC (or LEC) as
           described in accordance with the BellCore Practice BR 981-200-110.

      B.   Charges - the amount approved or allowed by the appropriate
           regulatory authority to be billed to an end user for any of the
           services described in Section II., rendered by a LEC to an end user.

      C.   Compensation - the amount to be paid by one Party to the other Party
           for billing, collecting and remitting of charges as set forth in
           Section IV.

      D.   IntraLATA - within a Local Access Transport Area (LATA) - IntraLATA
           messages are those messages, either intrastate or interstate, which
           originate and terminate within a LATA. The term "IntraLATA messages,"
           as used herein, shall only include those that qualify for the
           BellCore Client Company BCC CATS process.

      E.   InterLATA - between Local Access and Transport Areas (LATAs) as
           defined in the FCC's CC Docket No. 78-72. InterLATA messages are
           those messages which originate in one LATA and terminate in a
           different LATA. The term "InterLATA messages" as used herein, shall
           only include those that qualify for the BellCore Client Company BCC
           CATS process.

      F.   Local Exchange Carrier (LEC) - as used in this Appendix shall mean
           those Local Exchange Carriers or Local Service Providers using BCC
           CATS as a message tracking system.

      G.   Local Message - Local messages . are those messages which originate
           and terminate within the area defined as the local service area of
           the station from which the message originates.

      H.   Revenues - the sum of all or part of the charges as defined above.


<PAGE>   59


                                                                    APPENDIX BCR
                                                                     Page 3 of 5

II.  SCOPE OF APPENDIX

     This Appendix shall apply to procedures for the billing, collecting and
     remitting of revenues (and compensation to either Party for billing,
     collecting and remitting of such revenues) derived from the following
     services:

     A.  LEC-carried (traffic transported by facilities belonging to a LEC) 
         local messages of the following types:

         1.       Local Message Service Charges Billed to a Calling Card or
                  to a Third Number.

         2.       Directory Assistance Calls Charged to a Calling Card or to 
                  a Third Number.

         3.       Public Land Mobile Radiotelephone Transient-Unit Local Message
                  Service (Mobile Channel Usage Link Charge).

         4.       Maritime Mobile Radiotelephone Service and Aviation 
                  Radiotelephone Service (Marine, Aircraft, High Speed Train
                  Radio Link Charges).

     B.  LEC-carried Interstate IntraLATA and Interstate InterLATA
         telecommunications services that qualify for and flow through the BCC
         CATS process as addressed in the BellCore Practice BR 981-200-110, of
         the following types:

         1.       Interstate IntraLATA Toll Service carried by an LEC and 
                  charged to a Calling Card or a Third Number.

         2.       Interstate InterLATA Toll Service carried by an LEC and 
                  charged to a Calling Card or a Third Number.

         3.       Radio Link Charges where service is provided by one LEC and 
                  billed by another LEC.

III      RESPONSIBILITIES OF THE PARTIES

         A.       LSP agrees to bill, collect and remit to SWBT the charges for
                  the services described in Section II. which charges are earned
                  by any LEC (including SWBT), but which are to be billed to end
                  users of the LSP.

         B.       In those cases in which the charges for the services listed in
                  Section II. are due any LEC other than SWBT, SWBT will arrange
                  to transfer these and charges to the appropriate company in
                  accordance with accepted industry standards.

<PAGE>   60


                                                                    APPENDIX BCR
                                                                     Page 4 of 5

         C.       Charges for the services listed in Section II. to be billed,
                  collected and by LSP for SWBT's benefit, shall be remitted by
                  LSP to SWBT within 30 days of the date of SWBT's bill to LSP
                  for such services.

         D.       SWBT agrees to bill and collect (or to have another LEC bill
                  and collect, where the appropriate), and to remit to LSP, the
                  charges for the services described in Section II., which
                  charges are earned by LSP, but which are to be billed by
                  another LEC (including SWBT) to the end users of that LEC.

         E.       Charges for the services listed in Section II. to be billed,
                  collected and remitted by SWBT or another LEC for LSP's
                  benefit, shall be remitted by SWBT to LSP within 30 days of
                  the date of LSP's bill to SWBT for such services.

         F.       The full amount of the charges transmitted to either Party for
                  billing, collecting and remitting shall be remitted by the
                  other Party, without setoff, abatement or reduction for any
                  purpose, other than to deduct the compensation, as described
                  in Section IV, due the Party for performing the end user
                  billing function. The Party billing the end user shall be
                  responsible for all uncollectible amounts related to the
                  services described remitted in Section II. Notwithstanding
                  this paragraph, SWBT may net amounts due to LSP under this
                  Appendix against amounts owed to SWBT when SWBT renders a bill
                  to LSP hereunder.

         G.       Each Party will furnish to the other such information as may 
                  be required for monthly billing and remitting purposes.

IV.      COMPENSATION

         A Party performing the services described in Section II. A. will
         compensate the other Party in the amount of $.08 for each charge billed
         for any service described in Section II.A. and subsequently remitted
         pursuant to this Appendix by such other Party to the Party performing
         the services described in Section II. A. A Party performing the
         services described in Section II. B. will compensate the other Party in
         the amount of $.05 for each charge billed for any service described in
         Section II. B. and subsequently remitted pursuant to this Appendix by
         such other Party to the Party performing the services described in
         Section II. B. Such compensation shall be paid (unless a Party has
         collected such compensation as described in Section III.F. above)
         within 30 days of the date of a bill for such compensation by the Party
         performing (or which has another LEC perform for it), the billing,
         collecting and remitting functions described in Section III.

V.       SWBT MAKES NO REPRESENTATIONS OR WARRANTIES, EXPRESS OR IMPLIED, 
         INCLUDING BUT NOT LIMITED TO ANY WARRANTY AS TO MERCHANTABILITY OR
         FITNESS FOR INTENDED OR PARTICULAR PURPOSE WITH RESPECT TO SERVICES
         PROVIDED HEREUNDER. ADDITIONALLY, SWBT ASSUMES NO RESPONSIBILITY WITH
         REGARD TO THE


<PAGE>   61


                                                                    APPENDIX BCR
                                                                     Page 5 of 5


         CORRECTNESS OF THE DATA SUPPLIED BY LSP WHEN THIS DATA IS ACCESSED AND
         USED BY A THIRD PARTY.









<PAGE>   62


                                                                     APPENDIX CH
                                                                     Page 2 of 4

                           APPENDIX CLEARINGHOUSE (CH)

WHEREAS, SWBT operates a Clearinghouse (CH), as described below, for its own
behalf and that of participating LECs and LSPs, including LSP; and

WHEREAS, LSP wants to participate in the CH on the terms set forth herein;

The Parties agree to the following:

1.       CLEARINGHOUSE DESCRIPTION

         SWBT operates a CH for the purpose of facilitating the exchange of
         certain alternatively billed intrastate intraLATA message toll call
         records and the reporting of settlement revenues owed by and among
         participating LECs and LSPs, including SWBT and LSP.

2.       QUALIFYING MESSAGE CRITERIA

         The only toll call messages that qualify for submission to SWBT for CH
         processing are: (a) intrastate intraLATA sent collect (including
         calling card, collect and third number) messages which are originated
         in one LEC or LSP exchange, exclusively carried by a LEC or LSP over
         LEC or LSP facilities and billed to a customer located in a second
         LEC's or LSP exchange within the same state; or (b) intrastate
         intraLATA sent collect (but limited to calling card and third number)
         messages originated in one of SWBT's operating areas (located in parts
         of Texas, Arkansas, Kansas, Missouri or Oklahoma), exclusively carried
         by a LEC or LSP over LEC or LSP facilities, and billed to a customer
         located in a second LEC's or LSP exchange and not in the originating
         State.

3.       RESPONSIBILITIES OF THE PARTIES

A.       LSP  agrees that it will provide SWBT with billing records for CH
         processing that are in an industry standard format acceptable to SWBT
         and at a minimum will display the telephone number of the end user to
         whom the call is to be billed, and data about the call sufficient for a
         carrier to comply with all applicable state regulatory requirements.
         For purposes of this Attachment, these records ("CH Records") will
         detail intraLATA toll calls which were originated by use of the single
         digit access code (i.e., 0+ and 0-) in one LEC or LSP exchange but are
         to be billed to an end user in a second LEC's or LSP exchange. Such
         records are referred to as category 92 records for CH processing
         purposes. The term "CH Record" will mean the call detail attributed to
         a single completed toll message.

         LSP agrees that all CH Records it generates will display indicators
         denoting whether category 92 Records should be forwarded to SWBT's CH.
         LSP will retain its originating


<PAGE>   63


                                                                     APPENDIX CH
                                                                     Page 3 of 4

         records for ninety (90) days such that the category 92 Records can be
         retransmitted to SWBT for CH processing, if needed.

B.       SWBT will provide and maintain such systems as it believes are required
         to furnish the CH service described herein. SWBT, in its capacity as
         operator of the CH, agrees to retain all CH Records processed through
         the CH for two (2) years.

C.       LSP will timely furnish to SWBT all CH Records required by SWBT to
         provide the CH service in accordance with the Technical Exhibit
         Settlement Procedures (TESP) dated DD/MM/YEAR, or as otherwise mutually
         agreed upon by the Parties. SWBT will provide the CH service in
         accordance with the TESP, and such modifications as are subsequently
         agreed upon.

D.       Presently, in operating the CH, SWBT relies upon NXX codes to identify
         messages for transmission to participating billing companies. To the
         extent any subprocesses are required to settle CH messages due to the
         use of ported numbers, such subprocessing will be the responsibility of
         the porting entity.

4.       PROCESSING CHARGE

         LSP agrees to pay SWBT a processing charge in consideration of SWBT's
         performance of CH services. This charge is $.02 per originated CH
         Record processed on behalf of LSP .

5.       BILLING CHARGE

         LSP agrees to pay a $.05 per message charge to the LEC or LSP
         responsible for billing the message, including SWBT, when SWBT bills
         the message.

6.       SETTLEMENT REPORT

         SWBT will issue monthly reports containing the results of the
         processing of CH Records to each participating LEC and LSP. These
         reports list the (a) amounts owed by LSP for billing messages
         originated by others; (b) amounts due to LSP for LSP-originated
         messages billed by others; (c) applicable billing charges; and (d)
         processing charges.

7.       RETROACTIVE AND LOST MESSAGES

         The Parties agree that processing of retroactive messages through the
         CH is acceptable, if such messages utilize the industry standard format
         for call records, pursuant to Section 3 of this Attachment. The Parties
         agree that lost messages are the complete responsibility of the
         originating LEC or LSP. If messages are lost by any Party, and cannot
         be recreated or retransmitted, the originating LEC or LSP will estimate
         messages, minutes, and associated revenues based on the best available
         data. No estimate will be made for


<PAGE>   64


                                                                     APPENDIX CH
                                                                     Page 4 of 4

         messages which are more than two years old at the time the estimate is
         made. The estimates will be off-line calculations (i.e., not part of
         the routine CH processing) and will be included as a supplement to the
         monthly settlement report.

8.       LIMITATION OF LIABILITY

         By agreeing to operate the CH, SWBT assumes no liability for any LEC's
         or LSP's receipt of appropriate revenues due to it from any other
         entity. LSP agrees that SWBT will not be liable to it for damages
         (including, but not limited to, lost profits and exemplary damages)
         which may be owed to it as a result of any inaccurate or insufficient
         information resulting from any entity's actions, omissions, mistakes,
         or negligence and upon which SWBT may have relied in preparing
         settlement reports or performing any other act under this Attachment.

         LSP agrees to indemnify and hold SWBT harmless against and with respect
         to any and all third party claims, demands, liabilities or court
         actions arising from any of its actions, omissions, mistakes or
         negligence occurring during the course of SWBT's performance of CH
         processing pursuant to this Attachment.

         SWBT will not be liable for any losses or damages arising out of
         errors, interruptions, defects, failures, or malfunction of the CH
         services provided pursuant to this Attachment, including those arising
         from associated equipment and data processing systems, except such
         losses or damages caused by the sole negligence of SWBT. Any losses or
         damage for which SWBT is held liable under this Attachment will in no
         event exceed the amount of processing charges incurred by LSP for the
         CH services provided hereunder during the period beginning at the time
         SWBT receives notice of the error, interruption, defect, failure or
         malfunction, to the time service is restored.

9.       DISCLAIMER OF WARRANTIES

         SWBT MAKES NO REPRESENTATIONS OR WARRANTIES, EXPRESS OR IMPLIED,
         INCLUDING BUT NOT LIMITED TO ANY WARRANTY AS TO MERCHANTABILITY OR
         FITNESS FOR INTENDED OR PARTICULAR PURPOSE WITH RESPECT TO SERVICES
         PROVIDED HEREUNDER. ADDITIONALLY, SWBT ASSUMES NO RESPONSIBILITY WITH
         REGARD TO THE CORRECTNESS OF THE DATA SUPPLIED BY LSP WHEN THIS DATA IS
         ACCESSED AND USED BY A THIRD PARTY.

<PAGE>   65


                                                                   APPENDIX CNAM
                                                                    Page 2 of 11

                                  APPENDIX CNAM


This appendix contains the terms and conditions under which SWBT and LSP shall
provide CNAM Service Query service (or equivalent service):

1.       Definitions

         A. A-links mean a diverse pair of facilities connecting local end
office switching centers with Signaling Transfer Points.

         B. Calling Name Delivery (CNAM) service enables the terminating end
user to identify the calling party by a displayed name before the call is
answered. The calling party's name, date and time of the call are retrieved from
an SCP database and delivered to the end user's premise between the first and
second ring for display on compatible customer premise equipment (CPE).

         C. CNAM Service Query is SWBT's service that allows LSP to query SWBT's
Calling Name database for Calling Name information in order to deliver that
information to LSP's local subscribers.

         D. Calling Name database means a Party's database containing current
Calling Name information of all working lines served or administered by that
Party, including the Calling Name information of any telecommunications company
participating in that Party's Calling Name database.

         E. Calling Name information means telecommunications companies' records
of all their subscribers' names associated with one or more assigned ten-digit
telephone numbers.

         F. Service Control Point (SCP) is a CCS network node where the Calling
Name database resides.

         G. Service Point (SP) means a CCS network interface element capable of
initiating and/or terminating SS7 messages from an end office.

         H. Service Switching Point (SSP) means the software capability within a
switching point that provides the SP with SS7 message preparation/interpretation
capability plus SS7 transmission/reception access ability.

         I. Signaling Transfer Point (STP) is the point where a Party
interconnects with a CCS/SS7 network. In order to connect to SWBT's SS7 network,
LSP or a third party initiating LSP's Calling Name Queries must connect with an
SWBT STP in order to connect to SWBT's SCP.

<PAGE>   66


                                                                   APPENDIX CNAM
                                                                    Page 3 of 11

         J. Common Channel Signaling (CCS) Network is an out-of-band,
packet-switched, signaling network used to transport supervision signals,
control signals, and data messages. CNAM Queries and Response messages are
transported across the CCS network.

         K. Signaling System 7 (SS7) is the signaling protocol used by the CCS
network.

         L. CNAM Service Query Rate applies to each CNAM Query received at the
SCP where a Party's Calling Name database resides.

         M. Query Transport Rate applies to each CNAM Query transported through
a Party's interconnecting STP and between the STP and the Calling Name database.
SWBT and LSP shall list their STP locations in the National Exchange Carrier
Association, Inc. Tariff FCC No. 4.

         N. Query means a message in American National Standards Institute's
(ANSI) standard SS7 signaling protocol which represents a request to a Calling
Name database for Calling Name information.

         O. Response means an SS7 message which when appropriately interpreted
represents an answer to a Query.

         P. Name Record Administering Companies means telecommunications
companies that administer telephone number assignments to the public and which
make their Calling Name information available in a Party's Calling Name
database.

2.       Description of Service

         A. SWBT shall provide LSP Calling Name information whenever LSP
initiates a Query from an SSP for such information associated with a call
terminating to a CNAM subscriber.

         B. All Queries to SWBT's Calling Name database shall use subsystem
number (the designation of application) value of 000 with a translation type of
005 and a subsystem number in the calling party field mutually agreed upon by
the Parties. LSP acknowledges that such subsystem number and translation type
values are necessary for SWBT to properly process Queries to its Calling Name
database.

         C. LSP warrants to SWBT that it shall send Queries conforming to the
ANSI approved standards for SS7 protocol and pursuant to the specification
standards documents identified in Exhibit A. Both Parties acknowledge that
transmission in said protocol is necessary for each party to provision CNAM
Service Query. (Or the equivalent thereof). Both Parties warrant that they shall
send SS7 Messages that comply with ANSI approved standards for SS7 protocol and
pursuant to the specification standards documents identified in Exhibit A. Each
party reserves the right to modify its network pursuant to other specifications
standards, which may include Bellcore specifications defining specific service
applications, message types and

<PAGE>   67


                                                                   APPENDIX CNAM
                                                                    Page 4 of 11

formats, that may become necessary to meet the prevailing demands within the
U.S. telecommunications industry. All such changes shall be announced a minimum
of 180 days in advance of implementation through industry standard procedures.
Each party will work cooperatively to coordinate any necessary changes.

         D. LSP acknowledges and agrees that CCS/SS7 network overload due to
extraordinary volumes of Queries and/or other SS7 network messages can and will
have a detrimental effect on the performance of SWBT's CCS/SS7 network. LSP
further agrees that SWBT, in its sole discretion, shall employ certain automatic
and/or manual overload controls within its CCS/SS7 network to guard against
these detrimental effects. SWBT shall report to LSP any instances where overload
controls are invoked due to LSP's CCS/SS7 network and LSP agrees in such cases
to take immediate corrective actions as are necessary to cure the conditions
causing the overload situation.

         E. Prior to initiating service under this Agreement, LSP shall provide
to SWBT an initial forecast of busy hour Query volumes. If, prior to the
establishment of a mutually agreeable service effective date, in writing, SWBT,
at its discretion, determines that it lacks adequate storage or processing
capability to provide CNAM Service Query to LSP, SWBT shall notify LSP of its
intent not to provide the services under this Appendix and this Appendix will be
void and have no further effect.

         F. Upon request, LSP shall update its busy hour forecast for each
upcoming calendar year (January - December) by October 1 of the preceding year.
LSP shall provide such updates each year for the first three (3) years of this
Agreement.

         G. SWBT provides CNAM Service Query as set forth in this Appendix only
as such service is used for LSP's activities as a local service provider in
SWBT's traditional serving areas in the states of Arkansas, Kansas, Missouri,
Oklahoma, and Texas. SWBT provides CNAM Service Query for interexchange
carriers, operator service providers, and other telecommunications companies
under separate contract rates. LSP agrees that any use of SWBT's LIDB for the
provision of CNAM Service Query by LSP, including, but not limited to, when LSP
acts as an LSP outside of SWBT's traditional serving areas in the states of
Arkansas, Kansas, Missouri, Oklahoma, and Texas, and/or acts as an operator
service provider to other LSPs, local exchange companies, or any other
telecommunications company, and/or acts as an interexchange carrier, will be
pursuant to the standard terms, conditions, rates and charges of SWBT's non-LSP
contracts, as revised, for CNAM Service Query.

3.       Price and Payment

         A. LSP shall pay a CNAM Service Query Rate of $0.0115 and a Query
Transport Rate of $0.0045 for each Query initiated into SWBT's Calling Name
database. Additional nonrecurring charges for point code activation of $36.00
and service order activity of $256.70 shall be applicable for all such activity
after the initial service order and initial point code activation. The per CNAM
Service Query rate SWBT charges hereunder may be increased upon

<PAGE>   68


                                                                   APPENDIX CNAM
                                                                    Page 5 of 11

sixty (60) days written notice to the LSP unless LSP acts as an agent on behalf
of other carriers in which case ninety (90) days written notice shall be given.
Upon such notice, the Party receiving notice may terminate this Appendix without
any termination liability as provided in Section 5(B) of this Appendix. All
tariffed rates associated with Services provided hereunder are subject to change
pursuant to revisions of such tariffs.

         B. SWBT shall record usage information for LSP's CNAM Queries
terminating to SWBT's Calling Name database. SWBT shall use its SCPs as the
source of usage data. SWBT shall aggregate usage by the point code of the
Query-originating SSP.

         C. Based upon the data identified in Subsection 3.B above, SWBT shall
bill the LSP for its CNAM Queries on a monthly basis. The bill will be issued by
the fifteenth day of each month, and LSP shall pay the Subsection 3.B bill
within thirty (30) days of the bill issue date. 

         D. Depending on LSP's choice of method for transporting its Queries and
responses, LSP may be required to purchase certain other services, especially
services that may be provided pursuant to effective tariffs. In this event the
prices, terms, conditions and billing for such services will be specified in the
applicable tariff(s), and this Appendix shall not be construed to circumvent the
prices, terms, conditions, or billing as specified in the applicable tariff(s).

         E. If there is a dispute associated with a monthly bill, the disputing
Party shall notify the other in writing within ninety (90) calendar days of the
date of said monthly bill or the dispute shall be waived. Each party agrees that
any amount of any monthly bill that the Party disputes will be paid by that
Party according to the terms of Subsection 3.C above. Any adjustments relating
to a disputed amount shall be reflected on the next monthly bill issued after
resolution. Any credit issued upon resolution of any dispute shall bear interest
at the rate specified in Subsection 3.C. above, payable on and as of the date
the credit is issued. Parties shall work cooperatively and use their best
efforts to resolve any disputes as quickly as possible.

         F. If LSP acts as a telecommunications company other than a local
service provider, or if LSP acts as a local service provider in areas outside of
SWBT's traditional service areas in the states of Arkansas, Kansas, Missouri,
Oklahoma, and Texas, LSP will designate those point codes from which it
originates CNAM Service Queries as an LSP acting as a local service provider
within SWBT's traditional service areas in the states of Arkansas, Kansas,
Missouri, Oklahoma and Texas from those point codes which originate CNAM Service
Queries for all other aspects of its business. If LSP uses the same OPC to
originate Queries for its operations as an LSP within SWBT's traditional service
areas in the states of Arkansas, Kansas, Missouri, Oklahoma, and Texas as it
does for any other aspect of its business, then LSP will provide SWBT with a
percentage of use factor that SWBT can use to apportion LSP's traffic between
SWBT's terms and conditions, rates and charges under this Appendix and the
standard terms, conditions, rates and charges under SWBT's non-LSP contracts.
LSP will provide this factor in a whole number between one (1) and one hundred
(100) to indicate the percentage of CNAM Service Queries LSP originates as an
LSP acting as a local service provider within SWBT's traditional service area in
the states of Arkansas, Kansas, Missouri, Oklahoma, and Texas.  A percentage of

<PAGE>   69


                                                                   APPENDIX CNAM
                                                                    Page 6 of 11

use factor of 1 (one) indicates that one percent of LSP's CNAM Service Queries
originate as an LSP acting as a local service provider within SWBT's
traditional service areas in the states of Arkansas, Kansas, Missouri,
Oklahoma, and Texas. A percentage of use factor of 100 indicates that one
hundred percent of LSP's traffic is from LSP acting as a local service provider
within SWBT's traditional service areas in the states of Arkansas, Kansas,
Missouri, Oklahoma, and Texas. 

         G. Such percentage of use factors will be provided by LSP on the LIDB
Access Service Order Form used to establish the service. All updates to this
factor will be provided via a letter. If LSP does not furnish a percentage of
usage factor, LSP agrees that SWBT will apply a percentage of use factor of one
percent (1%).

         H. LSP agrees to update its percentage of use factors on a quarterly
basis. Effective on the first of January, April, July and October of each year,
LSP will forward to SWBT, to be received no later than fifteen (15) business
days after the first of each such month, a revised report showing the percentage
of use factors for the past three months ending the last day of December, March,
June, and September, respectively, for each OPC from which LSP originates CNAM
Service Query. Both parties agree that the revised report will serve as the
basis for the next three months billing. Both parties agree that no prorating or
backbilling will be done based on the report. SWBT will use the revised report
to apportion usage rate, monthly rates, and nonrecurring charges until a revised
report is received from LSP as set forth and agreed to herein.

         I. Both parties agree that SWBT may, upon written request by Certified
U.S. mail (return receipt requested), require LSP to provide call detail records
which will be audited to substantiate the projected percentage of use factor
provided by LSP. SWBT may request this detailed information annually. If the
audit results represent what SWBT considers to be a substantial deviation from
LSP's previously reported percentage of use for the period upon which the audit
is based, and that deviation is not due to seasonal changes or other
identifiable reasons, LSP agrees to allow SWBT to request such call detail
records more than once annually. Both parties agree that SWBT may make the call
detail records available to an independent auditor or to SWBT audit employees
within thirty (30) days of the request at an agreed upon location during normal
business hours.

         J. Both parties agree that if LSP fails to comply with SWBT's request
for auditable call detail records, SWBT may refuse additional applications for
service and/or refuse to complete any pending orders for service for a period of
thirty (30) days. If at the conclusion of thirty (30) days, LSP still does not
comply with this request, both parties agree that SWBT may apply an assumed
percentage of use factor of one percent (1%).

4.       Ownership of the Calling Name Information

         A. Telecommunications  companies  depositing  information in a 
Party's   Calling Name database retain full and complete ownership and control
over such Calling Names information in
        
<PAGE>   70


                                                                   APPENDIX CNAM
                                                                    Page 7 of 11

that Calling Name database. The querying Party obtains no ownership interest
by virtue of this Appendix.

         B. LSP shall not copy, store, maintain or create any table or database
of any kind after initiation of, and based upon a response to, a CNAM Query to
SWBT's calling name database.

         C. If LSP acts on behalf of other carriers, LSP shall prohibit its
Query-originating carrier customers from copying, storing, maintaining, or
creating any table or database of any kind from any Response provided by SWBT
after a CNAM Query to a Calling Name database.

5.       Term and Termination

         A. This Appendix shall become effective pursuant to Section XXVII
(Effective Date) of the Agreement and shall continue for two (2) years from the
date of implementation of CNAM Service Query (or the equivalent thereof).
Thereafter, this Appendix shall remain in effect unless terminated by either
party upon written notice given sixty (60) days in advance of the termination
date.

         B. Should LSP terminate this Appendix within the first six (6) months
of this effective date, LSP agrees to pay SWBT an early termination sum equal to
two (2) times the average monthly volume of LSP's CNAM Queries times the rate
specified in Section 3(A) of this Appendix. The average monthly volume will be
calculated using the previous two (2) months' volume divided by two (2) or, if
less than two months, the monthly volume of the first month service was
provided.

         C. If at any time during the term of this Appendix a tariff for CNAM
Service Query (or the equivalent service thereof) becomes effective, the tariff
and all terms and conditions, including all rates, will supersede this Appendix.
Under these circumstances, no termination liability as provided in Section 5(B)
of this Appendix will apply.

         D. If a party materially fails to perform its obligation under this
appendix, the other party, after notifying the non-performing party of the
failure to perform and allowing that party thirty (30) days after receipt of the
notice to cure such failure, may cancel this appendix immediately upon written
notice.

         E. Notwithstanding anything to the contrary in this Appendix, if legal
or regulatory decisions or rules compel SWBT or LSP to terminate the Appendix,
SWBT and LSP shall have no liability to the other in connection with such
termination.

6.       Limitation of Liability

         A. LSP's sole and exclusive remedies against SWBT for injury, loss or
damage caused by or arising from anything said, omitted or done in connection
with this Appendix regardless of the form of action, whether in contract or in
tort (including negligence or strict liability) shall be

<PAGE>   71


                                                                   APPENDIX CNAM
                                                                    Page 8 of 11

the amount of actual direct damages and in no event shall exceed the amount paid
for CNAM Service Queries.

         B. The remedies in Section 6(A) of this Appendix shall be exclusive of
all other remedies against a Party, its affiliate, subsidiaries or parent
corporation, (including their directors, officers, employees or agents).

         C. In no event shall SWBT have any liability for system outages or
inaccessibility, or for losses arising from the unauthorized use of the data by
CNAM Service Query purchasers.

         D. CALLING NAME INFORMATION PROVIDED TO AN LSP HEREUNDER SHALL BE
PROVIDED "AS IS." SWBT MAKES NO WARRANTY, EXPRESS OR IMPLIED, REGARDING THE
ACCURACY OR COMPLETENESS OF THE CALLING NAME INFORMATION REGARDLESS OF WHOSE
CALLING NAME INFORMATION IS PROVIDED. AND, SWBT SHALL NOT BE HELD LIABLE FOR ANY
ACTIONS OR OMISSIONS ARISING OUT OF OR IN CONJUNCTION WITH LSP'S USE OF THE
CALLING NAME INFORMATION. NOTWITHSTANDING THE FOREGOING, SWBT WARRANTS THAT LSP
WILL BE ACCESSING THE SAME CALLING NAME DATABASE FOR CUSTOMER'S CNAM QUERIES AS
SWBT ACCESSES FOR ITS OWN QUERIES.

         E. SWBT is furnishing access to its Calling Name database in order to
facilitate the LSP's provision of Calling Name Delivery Service (CNDS) to its
end users or to the end users of its Query-originating carrier customers, but
not to insure against the risk of completion of a call to a CNDS subscriber
without the display of the name of the caller. While each Party agrees to make
every reasonable attempt to provide accurate and current Calling Name
information, the Parties acknowledge that Calling Name information is the
product of routine business service order activity. LSP acknowledges that SWBT
can furnish Calling Name information only as accurate and current as the
information has been provided to SWBT for inclusion in its CNAM database.
Therefore, SWBT, in addition to the limitations of liability set forth, is not
liable for inaccuracies in the Calling Name information name records provided to
LSP or to its Query-originating carrier customers, except such inaccuracies
caused by SWBT's willful or wanton misconduct or gross negligence.

         The Parties acknowledge that each Calling Name database limits the
Calling Name information length to fifteen (15) characters. As a result, the
Calling Name Information provided in a response to a Query may not reflect a
subscriber's full name. Name records of residential local telephone subscribers
will generally be stored in the form of last name followed by first name
(separated by a comma or space) to a maximum of fifteen (15) characters. Name
records of business local telephone subscribers will generally be stored in the
form of the first fifteen (15) characters of the listed business name that in
some cases may include abbreviations. The Parties also acknowledge that certain
local telephone service subscribers of Name Record Administering Companies may
require their name information to be restricted, altered, or rendered
unavailable. Therefore, in addition to the limitations of liability set forth in
Section 6 of this Appendix, SWBT is not liable for any and all liability,
claims, damages or actions including attorney's fees,

<PAGE>   72


                                                                   APPENDIX CNAM
                                                                    Page 9 of 11

resulting directly or indirectly from the content of any Name Record contained
in a Calling Name database and provided to LSP or its Query-originating carrier
customers, except for such content related claims, damages or actions resulting
from SWBT's willful or wanton misconduct or gross negligence.

         F. The Parties acknowledge that certain federal and/or state
regulations require that local exchange telephone companies make available to
their subscribers the ability to block the delivery of their telephone number
and/or name information to the terminating telephone when the subscriber
originates a telephone call. This blocking can either be on a call-by-call basis
or on an every call basis. Similarly, a party utilizing blocking services can
unblock on a call-by-call basis or every call basis. LSP acknowledges its
responsibility to and warrant that it will abide by information received in SS7
protocol during call set-up that the calling telephone service subscriber wishes
to block or unblock the delivery of telephone number and/or name information to
a CNDS subscriber. LSP agrees not to attempt to obtain the caller's name
information by originating a Query to SWBT's Calling Name database where the
subscriber attempted to block such information, nor will LSP block information a
subscriber attempted to unblock. Therefore, SWBT, in addition to the limitations
of liability set forth in this Section, is not liable for any failure by LSP or
its Query-originating carrier customers to abide by the caller's desire to block
or unblock delivery of Calling Name information, and LSP agrees to hold SWBT
harmless from, and defend and indemnify SWBT for, any and all liability, claims,
damages or actions including attorney's fees, resulting directly or indirectly
from LSP or its Query-originating carrier customers' failure to block or unblock
delivery of the Calling Name information when appropriate indication is
provided, except for such privacy related claims, damages or actions caused by
SWBT's willful or wanton misconduct or gross negligence.

         G. In no event shall SWBT, its affiliates, subsidiaries or parent
corporation (including its directors, officers, employees or agents) have any
liability whatsoever to or through LSP for any indirect, special, or
consequential damages, including, but not limited to loss of anticipated profits
or revenue or other economic loss in connection with or arising from anything
said, omitted or done hereunder, even if SWBT has been advised of the
possibility of such damages.

7.       Communication and Notices

         A. Ordering and billing inquiries for the services described herein
from SWBT shall be directed to the Local Service Provider Service Center
(LSPSC). Ordering shall be done through the LSPSC using the form attached hereto
as Exhibit B.

8.       Confidentiality

         A. Identification. SWBT and LSP recognize and acknowledge that, in
connection with the services to be provided hereunder, it may disclose to the
other party proprietary or confidential customer, technical or business
information in written, graphic, oral or other tangible or intangible forms. In
order for such information to be considered "Proprietary Information" under this
Appendix, it must be marked "Confidential" or "Proprietary" or bear a marking of

<PAGE>   73


                                                                   APPENDIX CNAM
                                                                   Page 10 of 11

similar import. Orally discussed information shall be considered Proprietary
Information only if contemporaneously identified as such and reduced to writing
and delivered to the other party with a statement or marking of confidentiality
within twenty (20) calendar days after oral disclosure.

         B. Nondisclosure. Subject to Sections 8C through 8F, the Party (the
"Receiving Party") that receives Proprietary Information from the other Party
(the "Disclosing Party") agrees:

                  (1) That all Proprietary Information shall be and shall  
remain the exclusive property of the Disclosing Party.

                  (2) To limit access to such Proprietary Information to
authorized employees and other individuals who have a need to know the
Proprietary Information in order to perform its obligation under this Appendix.

                  (3) To keep such Proprietary Information confidential and to
use the same level of care to prevent disclosure or unauthorized use of the
received Proprietary Information as it exercises in protecting its own
Proprietary Information of a similar nature.

                  (4) For a period of three (3) years following any disclosure,
not to copy or publish or disclose such Proprietary Information to others or
authorize anyone else to copy or publish or disclose such Proprietary
Information to others without the prior written approval of the Disclosing
Party.

                  (5) To use such Proprietary Information only for purposes of
performing its obligations under this Appendix and for other purposes only upon
such terms as may be agreed upon between the Parties in writing.

         C. Required Disclosures. The Receiving Party agrees to give notice to
the Disclosing Party of any demand to disclose or provide Proprietary
Information of the Disclosing Party to another person, under lawful process,
prior to disclosing or furnishing such Proprietary Information. Further, the
Receiving Party agrees to reasonably cooperate if the Disclosing Party deems it
necessary to seek protective arrangements. The Receiving Party may disclose or
provide Proprietary Information of the Disclosing Party to meet the requirements
of a court, regulatory body or government agency having jurisdiction over the
Party; provided, however, that the Receiving Party shall notify the Disclosing
Party so as to give the Disclosing Party a reasonable opportunity to object to
such disclosure. The Disclosing Party may not unreasonably withhold approval of
protective arrangements provided by any such court, regulatory body or
government agency. Nothing herein requires either Party to support the position
of any person or entity as to whether any particular Proprietary Information is
proprietary under applicable law or this Section 8.

         D. Exceptions.  Notwithstanding anything to the contrary contained in 
this Appendix, the Proprietary Information described herein shall not be 
deemed confidential or proprietary and

<PAGE>   74
                                                                  APPENDIX CNAM
                                                                  Page 11 of 11

the Receiving Party shall have no obligation to prevent disclosure of such
Proprietary Information if such Proprietary Information :

                  (1) is already known to the Receiving Party;
                  (2) is or becomes publicly known, through publication,
inspection of the product, or otherwise, and through no wrongful act of the
Receiving Party;
                  (3) is received from a third party without similar restriction
and without breach of this Section 8; 
                  (4) is independently developed, produced or generated by the 
Receiving Party; 
                  (5) is furnished to a third party by the Disclosing Party 
without a similar restriction on the third party's rights; or
                  (6) is approved for release by written authorization of the
Disclosing Party, but only to the extent of such authorization.

         E. Permitted Uses. SWBT shall be permitted to use Proprietary
Information obtained through recording the volume of Customer Queries for the
purposes of: (a) estimation of facilities usage for jurisdictional separations;
(b) engineering and network planning of facilities; and (c) measurement for
billing purposes.

         F. Legal Requirements.  Notwithstanding anything to the 
contrary   contained in this Agreement, a Party's ability to disclose
Proprietary Information or use disclosed Proprietary Information is subject to
all applicable statutes, decisions and regulatory rules concerning the
disclosure and use of such Proprietary Information which, by their express
terms, mandate a different handling of such information.
        
9.       Mutuality

To the extent that LSP stores its own Calling Name information in a database,
LSP agrees that such Calling Name information shall be available to SWBT on
terms and conditions comparable to those contained in this Appendix. Such terms
and conditions shall include but not be limited to, making such Calling Name
information available on a platform technically similar to that employed by
SWBT, and at a rate comparable to that charged by SWBT.

10.      Attached and incorporated herein are:

Exhibit A            - Specifications and Standards
Exhibit B            - LIDB Access Service Order Form [to be attached].

<PAGE>   75


                                                                       Exhibit A
                                                                     Page 1 of 1

                          Specifications and Standards


Descriptions of Subject Area
and Issuing Organization                                      Document Number
- ----------------------------                                  ---------------

A.  Bellcore, SS7 Specifications                              TR-NPL-000246

B.  ANSI, SS7 Specifications
         - Message Transfer part                              T1.111
         - Signaling Connection Control                       T1.112
                  Part
         - Transaction Capabilities                           T1.114
                  Application Part

C.  Bellcore, CLASS Calling Name Delivery                     TR-NWT-001188
         Generic Requirements

D.  Bellcore, CCS Network Interface                           TR-TSV-000905
                  Specifications

<PAGE>   76
SOUTHWESTERN BELL TELEPHONE COMPANY 
CUSTOMER PROVIDED FACTOR REPORTS

                                                                       EXHIBIT B
                                                                  SEPTEMBER 1996
                                                                          PAGE 1

                   LIDB ACCESS VALIDATION SERVICES ORDER FORM
<TABLE>
<S><C>
CUSTOMER NAME ______________________________________________________________________________

CARRIER CUSTOMER NAME ABBREVIATION _____________________________
(CCNA - THREE ALPHA CHARACTERS)

CUSTOMER ADDRESS 
____________________________________________________________________________________________

CUSTOMER BILLING NAME 
____________________________________________________________________________________________
(IF DIFFERENT THAN CUSTOMER NAME)

ACCESS CUSTOMER NAME ABBREVIATION ______________________________
(ACNA - THREE ALPHA CHARACTERS)

CUSTOMER BILLING ADDRESS
____________________________________________________________________________________________ 
(IF DIFFERENT THAN CUSTOMER ADDRESS)

CITY, STATE, ZIP CODE 
____________________________________________________________________________________________

CUSTOMER BILLING CONTACT NAME AND TELEPHONE NUMBER ___________________________________
                                                  
____________________________________________________________(_______)_________________________

CREDIT INFORMATION:  TYPE OF OWNERSHIP ________
                     (S - SOLE OWNER; C - INCORP.; P - PARTNERSHIP)
IF INCORPORATED:
STATE WHERE INCORP. ___________ DATE INCORP. ______________

CHARTER NUMBER ____________________________________________

PRES. NAME _______________________________________________OFC. TEL. NO. _(___)____________________

V.P. NAME ________________________________________________OFC. TEL. NO. _(___)____________________

SECT. NAME _______________________________________________OFC. TEL. NO. _(___)____________________

TREA. NAME _______________________________________________OFC. TEL. NO. _(___)____________________

IF PARTNERSHIP:
PARTNERS NAME ____________________________________________OFC. TEL. NO. _(___)____________________

PARTNERS NAME_____________________________________________OFC. TEL. NO. _(___)_____________________

PARTNERS NAME_____________________________________________OFC. TEL. NO. _(___)_____________________
</TABLE>

<PAGE>   77
SOUTHWESTERN BELL TELEPHONE COMPANY
CUSTOMER PROVIDED FACTOR REPORTS


                                                                       EXHIBIT B
                                                                  SEPTEMBER 1996
                                                                          PAGE 2

<TABLE>
<S><C>
PARTNERS NAME__________________________________________OFC. TEL. NO. _(___)_____________________
LETTER OF AGENCY DATED ______________SIGNATURE ___________________________________________

SWBT ORDER NUMBER ___________________

DESIRED DUE DATE ______________________FIRM DUE DATE ______________________________________

FOR NEW SERVICE, THE APPROXIMATE NUMBER OF NPA NXXs ____________________________________

TYPE OF ACTIVITY ______ (N - NEW OR ADD; C - CHANGE; D - DISCONNECT; S - SUPP)

BILLING ACCOUNT NUMBER (BAN) ______________________________________________________________

CUSTOMER ORDER CONTACT NAME, ADDRESS, ZIP CODE, AND TELEPHONE NUMBER:

_____________________________________
_____________________________________
_______________________(____)________

CUSTOMER TECHNICAL CONTACT NAME AND TELEPHONE NUMBER:
___________________________________________________________________________(____)________________

CPOC SVC. REP. CONTACT NAME AND TELEPHONE NUMBER:
___________________________________________________________________________(____)________________


*SWBT CKR:_________________________________________*TWO SIX CODE:____________________________
                  (SWBT ID OF CCS/SS7 INTERCONN. SVC.)

1.         _______________________________
2.         _______________________________
3.         _______________________________
4.         _______________________________

*THIS INFORMATION SHOULD BE OBTAINED BY THE LIDB CUSTOMER FROM THEIR CCS/SS7 INTERCONNECTION SERVICE PROVIDER.
</TABLE>

<PAGE>   78
SOUTHWESTERN BELL TELEPHONE COMPANY
CUSTOMER PROVIDED FACTOR REPORTS

                                                                       EXHIBIT B
                                                                  SEPTEMBER 1996
                                                                          PAGE 3


LIDB VALIDATION SERVICE ____ CALLING NAME SERVICE ____

ORIGINATING LINE NUMBER SCREENING _____

ACT.     ORIGINATING POINT             ACT.      ORIGINATING POINT
TYPE     CODES:                        TYPE      CODES:

____       ___________________         ____      _______________________
____       ___________________         ____      _______________________
____       ___________________         ____      _______________________
____       ___________________         ____      _______________________
____       ___________________         ____      _______________________
____       ___________________         ____      _______________________
____       ___________________         ____      _______________________
____       ___________________         ____      _______________________
____       ___________________         ____      _______________________
____       ___________________         ____      _______________________
____       ___________________         ____      _______________________
____       ___________________         ____      _______________________


REMARKS _______________________________________________________________________
_______________________________________________________________________________
_______________________________________________________________________________

DATE AND TIME RECEIVED IN THE CPOC


<PAGE>   79
SOUTHWESTERN BELL TELEPHONE COMPANY
CUSTOMER PROVIDED FACTOR REPORTS


                                                                       EXHIBIT B
                                                                  SEPTEMBER 1996
                                                                          PAGE 4


LIDB VALIDATION SERVICE ____ CALLING NAME SERVICE ____

ORIGINATING LINE NUMBER SCREENING _____

ACT.     ORIGINATING POINT             ACT.      ORIGINATING POINT
TYPE     CODES:                        TYPE      CODES:

____       ___________________         ____      _______________________
____       ___________________         ____      _______________________
____       ___________________         ____      _______________________
____       ___________________         ____      _______________________
____       ___________________         ____      _______________________
____       ___________________         ____      _______________________
____       ___________________         ____      _______________________
____       ___________________         ____      _______________________
____       ___________________         ____      _______________________
____       ___________________         ____      _______________________
____       ___________________         ____      _______________________
____       ___________________         ____      _______________________

REMARKS _______________________________________________________________________
_______________________________________________________________________________
_______________________________________________________________________________

DATE AND TIME RECEIVED IN THE CPOC
<PAGE>   80
SOUTHWESTERN BELL TELEPHONE COMPANY                                    EXHIBIT B
CUSTOMER PROVIDED FACTOR REPORTS                                  SEPTEMBER 1996
                                                                          PAGE 5


                    LIDB ACCESS VALIDATION SERVICE ORDER FORM

                                  INSTRUCTIONS

THE LIDB ACCESS VALIDATION SERVICE ORDER FORM CONSISTS OF FOUR PAGES.

PAGE 1 - ALL THE INFORMATION ON THIS PAGE IS FOR ADMINISTRATIVE USE IN
         ESTABLISHING THE LIDB BILLING ACCOUNT. ALL OF THE INFORMATION IS
         REQUIRED ON THE INITIAL ORDER. ORDERS SUBMITTED SUBSEQUENT TO THE
         ESTABLISHED ACCOUNT WILL REQUIRE ONLY THE CUSTOMER'S NAME AND ADDRESS.
         THE OTHER ENTRIES WILL BE REQUIRED ONLY IF THERE IS A CHANGE TO THE
         ORIGINAL INFORMATION.

PAGE 2 - ALL THE INFORMATION ON PAGE TWO IS FOR THE REQUESTED ACTIVITY.  
         THIS INFORMATION WILL ALWAYS BE REQUIRED.

1.    DESIRED DUE DATE/FIRM DUE DATE - APPROXIMATE NUMBER OF NPA NXXs

      ***DESIRED DUE DATE IS USED WHEN A FIRM DUE DATE HAS NOT BEEN COORDINATED
      WITH THE LIDB CUSTOMER PRIOR TO THE SUBMISSION OF THE ORDER FORM TO THE
      ICSC.

      THE LIDB CUSTOMER WILL ENTER THEIR DESIRED DATE FOR THEIR LIDB SERVICE TO
      BE ESTABLISHED AND THE APPROXIMATE NUMBER OF NPA NXXs ASSOCIATED WITH THE
      NEW SERVICE.

      IF THE ORDER IS FOR SUBSEQUENT ACTIVITY TO AN ESTABLISHED ACCOUNT, THE
      APPROXIMATE NUMBER OF NPA NXXs WILL NOT BE REQUIRED.

      ***FIRM DUE DATE IS USED WHEN THE CUSTOMER'S ACCOUNT MANAGER HAS
      COORDINATED WITH THE SNAC TO ESTABLISH THE DUE DATE PRIOR TO THE ORDER
      FORM BEING SENT TO THE CPOC.





<PAGE>   81


SOUTHWESTERN BELL TELEPHONE COMPANY                                    EXHIBIT B
CUSTOMER PROVIDED FACTOR REPORTS                                  SEPTEMBER 1996
                                                                          PAGE 6

PAGE 2 INSTRUCTIONS CONTINUED -

2.    TYPE OF ACTIVITY

      N - SHOULD BE ENTERED TO ESTABLISH A LIDB SERVICE CAN ALSO BE ENTERED TO
          ADD ADDITIONAL POINT CODES TO AN EXISTING SERVICE

      C - SHOULD BE ENTERED TO ADD POINT CODES TO OR DELETE POINT CODES FROM AN
          EXISTING SERVICE

      D - SHOULD BE ENTERED TO COMPLETELY DISCONNECT AN EXISTING SERVICE

      S - SHOULD BE ENTERED TO MAKE A CHANGE ON A CURRENT ORDER PRIOR TO THE
          COMPLETION DATE (i.e., CHANGE DUE DATE, CORRECT POINT CODE(S), ETC.)

3.    BILLING ACCOUNT NUMBER (BAN)

      THE SWBT BILLING ACCOUNT NUMBER OF THE VALIDATION SERVICE AND/OR THE
      CALLING NAME SERVICE

      IF THE ORDER IS FOR NEW SERVICE, THIS FIELD WILL BE BLANK

4.    CUSTOMER ORDER CONTACT...

      A CONTACT WITH THE CUSTOMER THAT THE CPOC CAN COORDINATE WITH FOR THE
      DESIRED DUE DATE OR CORRECTIONS TO AN ORDER.

5.    CUSTOMER TECHNICAL CONTACT...

      A TECHNICAL CONTACT WITH THE CUSTOMER THAT THE SWBT SNAC CAN COORDINATE
      WITH FOR THE PROVISIONING OF THE SERVICE.

6.    CPOC SERVICE REP....

      THE SWBT CPOC SERVICE REPRESENTATIVE THAT NEGOTIATES THE ORDER WILL ENTER
      THEIR NAME AND CONTACT INFORMATION.

7.    SWBT CKR AND TWO SIX CODE

      THIS INFORMATION WILL BE OBTAINED BY THE LIDB CUSTOMER FROM THEIR ORDER TO
      ESTABLISH THEIR CCS/SS7 INTERCONNECTION SERVICE OR FROM THEIR CCS/SS7
      INTERCONNECTION SERVICE PROVIDER. THERE WILL ALWAYS BE FOUR LINKS FOR
      ACCESS TO THE LIDB.



<PAGE>   82


SOUTHWESTERN BELL TELEPHONE COMPANY                                    EXHIBIT B
CUSTOMER PROVIDED FACTOR REPORTS                                  SEPTEMBER 1996
                                                                          PAGE 7

INSTRUCTIONS FOR PAGES 3 & 4 -

LIDB HAS THREE QUERY SERVICES:  VALIDATION, CALLING NAME (CNAM), AND ORIGINATING
                                LINE NUMBER SCREENING (OLNS)

THERE IS NOT A SPECIFIC NUMBER OF POINT CODES REQUIRED FOR ANY LIDB SERVICE. THE
LIDB CUSTOMER CAN SUBMIT AS MANY COPIES OF PAGES 3 & 4 AS REQUIRED FOR THEIR
POINT CODES PER REQUEST.

THE VALIDATION, CNAM, AND OLNS WILL BE ESTABLISHED ON A SINGLE BILLING ACCOUNT.
IF THE LIDB CUSTOMER WOULD LIKE SEPARATE BILLING ACCOUNTS, THEN SEPARATE BANs
MUST BE REQUESTED (i.e. "ESTABLISH SEPARATE BILLING ACCOUNTS") IN THE BILLING
ACCOUNT NUMBER FIELD ON PAGE 2. IF AN EXISTING LIDB CUSTOMER WANTS TO ESTABLISH
THEIR LIDB CNAM ON A SEPARATE BILLING ACCOUNT, THEN THE LIDB CUSTOMER SHOULD
ENTER "NEW BAN (OR SEPARATE BAN) FOR THE LIDB CNAM SERVICE" IN THE BILLING
ACCOUNT NUMBER FIELD ON PAGE 2. THE SAME WILL APPLY FOR A SEPARATE BAN FOR OLNS.
IN ORDER TO SET UP SEPARATE BILLING ACCOUNTS, THE POINT CODES FOR THE LIDB
VALIDATION, CNAM, AND OLNS SERVICES CANNOT BE THE SAME. THE CUSTOMER WILL USE
BOTH PAGES 3 & 4 TO SUBMIT THEIR POINT CODES SEPARATELY FOR SEPARATE BILLING
ACCOUNTS.

1.    LIDB VALIDATION SERVICE _____ CALLING NAME SERVICE _____
      ORIGINATING LINE NUMBER SCREENING _____


      ENTER A CHECK MARK OR AN "X" TO INDICATE WHICH OF THE LIDB SERVICES THE
      ORDER FORM IS REQUESTING TO ESTABLISH OR DELETE. IF ALL LIDB SERVICES ARE
      REQUESTED ON THE SAME ORDER, THE POINT CODES FOR EACH SERVICE MUST BE
      LISTED ON SEPARATE PAGES. THIS WILL ENABLE SWBT TO APPLY THE CORRECT
      NONRECURRING CHARGES.

2.    ACTIVITY TYPES

      IF A LIDB CUSTOMER NEEDS TO CHANGE AN EXISTING OPC ON AN ESTABLISHED
      ACCOUNT, THE "D" SHOULD BE USED TO INDICATE THE OPC CHANGING FROM AND THE
      "N" SHOULD BE USED TO INDICATE THE OPC CHANGING TO.



<PAGE>   83


SOUTHWESTERN BELL TELEPHONE COMPANY                                    EXHIBIT B
CUSTOMER PROVIDED FACTOR REPORTS                                  SEPTEMBER 1996
                                                                          PAGE 8

PAGES 3 & 4 INSTRUCTIONS CONTINUED -

LIST OF ORIGINATING POINT CODES AND ACTIVITY TYPE

ACTIVITY TYPES:  N - ESTABLISHING OR ADDING NEW POINT CODE(S)
                 D - DELETE EXISTING POINT CODE(S)


PLEASE NOTE IN THE FOLLOWING EXAMPLES, THE ORDER FORM ACTIVITY IS THE ENTRY
FROM PAGE 2, NUMBER 3. THIS IS NOT THE ACTIVITY TYPE.


EXAMPLE 1 - ORDER FORM ACTIVITY IS "N" TO ESTABLISH A NEW ACCOUNT AND SERVICE

ACT.       ORIGINATING POINT                  ACT.          ORIGINATING POINT
TYPE       CODES:                             TYPE          CODES:

 N           XXX-XXX-XXX                      N               XXX-XXX-XXX



EXAMPLE 2 - ORDER FORM ACTIVITY IS "C" TO CHANGE AN EXISTING POINT CODE OR TO
            ADD A NEW POINT CODE AND DELETE AN EXISTING POINT CODE

ACT.       ORIGINATING POINT                  ACT.          ORIGINATING POINT
TYPE       CODES:                             TYPE          CODES:

 N           XXX-XXX-XXX                      D               XXX-XXX-XXX



EXAMPLE 3 - ORDER FORM ACTIVITY IS "D" TO DISCONNECT THE ACCOUNT AND THE SERVICE

ACT.       ORIGINATING POINT                 ACT.           ORIGINATING POINT
TYPE       CODES:                            TYPE           CODES:

 D           XXX-XXX-XXX                       D              XXX-XXX-XXX


THE REMARKS SECTION MAY BE UTILIZED BY SWBT OR THE LIDB CUSTOMER.

THE DATE AND TIME RECEIVED WILL BE ENTERED BY THE SWBT CPOC UPON RECEIPT OF THE
FORM.

AFTER THE FORM HAS BEEN COMPLETED, IT SHOULD BE MAILED OR FAXED TO THE SWBT
ICSC IN ST. LOUIS, MISSOURI.



<PAGE>   84
                                                                    APPENDIX DCO
                                                                     PAGE 2 OF 2





                                  APPENDIX DCO

EXCHANGE:
<TABLE>
<CAPTION>

====================================================================================================================
                                                                           NIP(4)
                                                                   [INSERT ADDRESS AND V&H      INTERCONNECTION
       DIRECTION(1)          LSP LOCATION(2)          DCO(3)                BELOW]                   METHOD
====================================================================================================================
<S>                         <C>                      <C>           <C>                          <C>

- --------------------------------------------------------------------------------------------------------------------


- --------------------------------------------------------------------------------------------------------------------


- --------------------------------------------------------------------------------------------------------------------


- --------------------------------------------------------------------------------------------------------------------

- --------------------------------------------------------------------------------------------------------------------
</TABLE>

- --------------------

1   This column will be completed by indicating the direction of the terminating
    traffic (e.g., either LSP to SWBT to SWBT to LSP.)

2   LSP LOCATION - The address of the LSP Location that will house LSP's
    interconnection equipment and through which SWBT will terminate traffic on
    the LSP's network.

3   DESIGNATED CONNECTING OFFICE (DCO) - The address of the SWBT end office or
    tandem through which the LSP will terminate traffic on SWBT's network.

4   NETWORK INTERCONNECTION POINT OR "NIP" - The NIP is the location where
    SWBT and LSP facilities connect.  The NIP will be identified by address and
    V&H Coordinates.  The NIP for traffic going from LSP to SWBT and going from
    SWBT to LSP could be different.  Where the physical  interface  occurs at a
    SWBT end office or tandem,  the NIP shall be located at the DCO.  When SWBT
    and an LSP agree to  interconnect  with a  Mid-Span  Fiber  Interconnection
    (MSFI) the NIP is the location  where the fiber of SWBT and the fiber of the
    LSP is  connected,  unless  both  Parties  agree  that  the NIP is  defined
    otherwise.  Where the physical interface occurs at the LSP location the NIP
    for that interconnection shall be located at the LSP location.


<PAGE>   85


                                                                      APPENDIX A
                                                                     PAGE 2 OF 5




                                   APPENDIX DA

                          DIRECTORY ASSISTANCE SERVICE

This Appendix sets forth the terms and conditions under which Southwestern Bell
Telephone Company ("SWBT") agrees to provide Directory Assistance Services (DA
Services) for LSP ("LSP").

I.       SERVICES

         SWBT will provide the following DA Services:

         A.       DIRECTORY ASSISTANCE (DA) - consists of providing subscriber
                  listing information (name, address, and published telephone
                  number or an indication of "non-published status") to LSP's
                  end users who dial 411 or NPA+555+1212 and whenever
                  appropriate, performing Non-Published and Non-List service
                  according to current SWBT methods and practices.

         B.       DIRECTORY ASSISTANCE CALL COMPLETION (DACC) - an optional
                  service in which SWBT completes a call to the requested number
                  on behalf of LSP's end user, utilizing an automated voice
                  system or with operator assistance. SWBT agrees to provide DA
                  with DACC upon request.

II.      DEFINITIONS

         The following terms are defined as set forth below:

         A.       Non-List Telephone Number - A telephone number that, at the
                  request of the telephone subscriber, is not published in a
                  telephone directory, but is available by calling a SWBT DA
                  operator.

         B.       Non-Published Number - A telephone number that, at the request
                  of the telephone subscriber, is neither published in a
                  telephone directory nor provided by a SWBT DA operator.

         C.       Published Number - A telephone number that is published in a
                  telephone directory and is available upon request by calling a
                  SWBT DA operator.

         D.       Call Branding - the procedure of identifying a providers name
                  audibly and distinctly to the consumer at the beginning of
                  each DA Services call, and prior to completion of a DACC
                  request.



<PAGE>   86


                                                                      APPENDIX A
                                                                     PAGE 3 OF 5

III.     CALL BRANDING AND RATE REFERENCE REQUIREMENTS

         A.       REQUIREMENTS - Where SWBT provides LSPs OS and DA services via
                  the same trunk, both the OS and DA calls will be branded with
                  the same brand. Where SWBT is only providing DA service on
                  behalf of the LSP, specific DA branding can be provided upon
                  request. Such branding will be provided pursuant paragraph B.
                  below.

         B.       CALL BRANDING - SWBT will brand DA in LSP's name based upon 
                  the criteria outlined below:

                  1.  LSP will provide SWBT with written specification of its
                      company name to be used in creating LSP specific branding
                      messages for its DA calls.

                  2.  An initial non-recurring charge applies per TOPS switch,
                      per load for the establishment of Call Branding as well as
                      a charge per TOPS switch, per subsequent load to change
                      the brand. In addition, a per call charge applies for
                      every DA call handled by SWBT on behalf of LSP when such
                      services are provided in conjunction with: i) the purchase
                      of SWBT's unbundled local switching; or ii) when multiple
                      brands are required on a single Operator Services trunk.
                      Prices for Call Branding are as outlined in Exhibit II,
                      attached hereto and incorporated herein.

         C.       DIRECTORY ASSISTANCE (DA) RATE/REFERENCE INFORMATION - SWBT
                  will provide LSP DA Rate/Reference Information based upon the
                  criteria outlined below:

                  1.  LSP will furnish DA Rate and Reference Information in a
                      mutually agreed to format or media thirty (30) days in
                      advance of the date when the DA Services are to be
                      undertaken.

                  2.  LSP will inform SWBT, in writing, of any changes to be
                      made to such Rate/Reference Information ten (10) working
                      days prior to the effective Rate/Reference change date.
                      LSP acknowledges that it is responsible to provide SWBT
                      updated Rate/Reference Information in advance of when the
                      Rates/Reference Information are to become effective.

                  3.  In all cases when a SWBT Operator receives a rate request
                      from a LSP end user, SWBT will quote the applicable DA
                      rates as provided by LSP.

An initial non-recurring charge will apply per TOPS switch for loading of LSP's
Operator Services Rate/Reference Information as well as a charge per TOPS switch
for each subsequent change to either the LSP's DA Services Rate or Reference
Information.


<PAGE>   87


                                                                     APPENDIX DA
                                                                     PAGE 4 OF 5

IV.      RESPONSIBILITIES OF THE PARTIES

         A.       SWBT will be the sole provider of DA Services for LSP's local
                  serving area(s) listed in Exhibit I, which is attached to this
                  Appendix, beginning on the service effective date also shown
                  in Exhibit I.

         B.       LSP will be responsible for providing the equipment and
                  facilities necessary for signaling and routing calls with
                  Automatic Number Identification (ANI) to each SWBT operator
                  switch. Should LSP seek to provide interexchange DA Service
                  under this agreement it is responsible for ordering the
                  necessary facilities. Nothing in this agreement in any way
                  changes the manner in which an interexchange Carrier obtains
                  access service for the purpose of originating or terminating
                  interexchange traffic.

         C.       Facilities necessary for the provision of DA Services shall be
                  provided by the parties hereto, using standard trunk traffic
                  engineering procedures to insure that the objective grade of
                  service is met. Each party shall bear the costs for its own
                  facilities. LSP shall bear the costs of facilities necessary
                  for signaling and routing calls with Automatic Number
                  Identification (ANI) to each SWBT operator switch. SWBT shall
                  bear the cost of facilities and equipment necessary to provide
                  DA Services.

         D.       LSP will furnish in writing to SWBT, thirty (30) days in
                  advance of the date when the DA Services are to be undertaken,
                  all end user listing records and information required by SWBT
                  to provide the DA Services.

         E.       LSP will keep end user listing records current using reporting
                  forms and procedures that are mutually acceptable to both
                  parties, and will inform SWBT, in writing, of any changes to
                  be made to such records. LSP will send the DA listing records
                  to SWBT via a local manual service order, T-TRAN, magnetic
                  tape or by any other mutually agreed to format or media.

         F.       SWBT will accumulate and provide LSP such data as necessary 
                  for LSP to verify traffic volumes and bill its end users.

V.       METHODS AND PRACTICES

         SWBT will provide the DA Services to LSP's end users in accordance with
         SWBT's DA methods and practices that are in effect at the time the DA
         call is made, unless otherwise agreed in writing by both parties.

VI.      PRICING

         Pricing for DA Services shall be based on the rates specified in
         Exhibit II, PRICING, which is attached hereto and made part of this
         Appendix. The prices will apply from the


<PAGE>   88


                                                                     APPENDIX DA
                                                                     PAGE 5 OF 5

         service effective date through the term of this agreement as specified
         in paragraph X., A. below. Beyond the specified term of this Appendix,
         SWBT may change the prices for the provision of DA Services upon one
         hundred-twenty (120) days' notice to LSP.

VII.     MONTHLY BILLING

         SWBT will render monthly billing statements to LSP, and remittance in
         full will be due within thirty (30) days of receipt.

VIII.    LIABILITY

         A.       In addition to the liability provisions contained in the
                  Agreement, LSP agrees to defend, indemnify, and hold harmless
                  SWBT from any and all losses, damages, or other liability
                  including attorneys fees that LSP may incur as a result of
                  claims, demands, wrongful death actions, or other suits
                  brought by any party that arise out of LSP's end users use of
                  DA Services. LSP shall defend against all end user claims just
                  as if LSP had provided such service to its end user with the
                  LSP's own operators and shall assert its tariff limitation of
                  liability for benefit of both SWBT and LSP.

         B.       LSP also agrees to release, defend, indemnify, and hold
                  harmless SWBT from any claim, demand or suit that asserts any
                  infringement or invasion of privacy or confidentiality of any
                  person or persons caused or claimed to be caused, directly, or
                  indirectly, by SWBT employees and equipment associated with
                  provision of the DA Services. This provision includes but is
                  not limited to suits arising from disclosure of the telephone
                  number, address, or name associated with the telephone called
                  or the telephone used to call the DA Services.

IX.      TERMS OF APPENDIX

         A.       Unless sooner terminated, this Appendix will continue in force
                  for a period of one (1) year from the effective date of this
                  agreement and thereafter until terminated by one
                  hundred-twenty (120) days notice in writing from either Party
                  to the other.

         B.       If LSP terminates this agreement prior to the agreed-upon term
                  of this Appendix, LSP shall pay SWBT, within thirty (30) days
                  of the issuance of a final bill by SWBT, all amounts due for
                  actual services provided under this Appendix, plus estimated
                  monthly charges for the remainder of the term. Estimated
                  charges will be based on an average of the actual monthly
                  amounts billed by SWBT pursuant to this Appendix prior to its
                  termination.

         C.       The rates applicable for determining the amount(s) under the
                  terms outlined in this Section are those specified in Exhibit
                  II.

<PAGE>   89


                                                         APPENDIX DA - EXHIBIT I
                                                               PAGE 1 OF 1


                                 APPENDIX DA
                   DIRECTORY ASSISTANCE SERVICES EXCHANGE LIST

                         EFFECTIVE: 
                                    ------------------
                                        (mm/dd/yr)

The following table depicts the services and exchanges covered by this Appendix:

<TABLE>
<CAPTION>



  SWBT SERVING OFFICE(S)      LSP'S OFFICE(S)          TOLL (555)            LOCAL (411)               DACC
- ---------------------------------------------------------------------------------------------------------------------
<S>                          <C>                   <C>                    <C>                   <C>
- ---------------------------------------------------------------------------------------------------------------------

- ---------------------------------------------------------------------------------------------------------------------

- ---------------------------------------------------------------------------------------------------------------------

- ---------------------------------------------------------------------------------------------------------------------

- ---------------------------------------------------------------------------------------------------------------------

- ---------------------------------------------------------------------------------------------------------------------
</TABLE>




<PAGE>   90
                                                        APPENDIX DA - EXHIBIT II
                                                                PAGE 1 OF 1

                                   APPENDIX DA
                                    ARKANSAS
                                   EXHIBIT II
                           PRICING - FACILITIES BASED

                        EFFECTIVE:
                                  -----------------------
                                       (mm/dd/yr)

The following rates will apply for each service element:

<TABLE>
<S><C>
               A.  DIRECTORY ASSISTANCE (DA)
               This usage rate applies to each DA call.

                                                                          Rate per call        $0.370

               B.  DIRECTORY ASSISTANCE CALL COMPLETION       DACC)

               This usage rate applies to each DA call that has been completed
               to the requested number.

                                                                Rate per completed call         $0.24
               C.  CALL BRANDING

               An initial non-recurring charge applies per TOPS switch, per
               brand for the establishment of Call Branding.

                                                                  Rate per initial load       $2,230.00
                                                         Rate per load for Brand change       $2,230.00
                                                                               Per Call(1)      $0.02
               D.  DA SERVICES RATE/REFERENCE INFORMATION

               An initial non-recurring charge applies per TOPS switch for the
               initial load of Carrier's DA Services Rate/Reference Information.
               An additional non-recurring charge applies for each subsequent
               change to Rate/Reference Information.

                                                                  Rate per initial load       $3,430.00
                                                        Rate per subsequent rate change       $2,450.00
                                                   Rate per subsequent reference change       $2,450.00
</TABLE>

- --------------------
(1)  A per call charge will apply when DA services are provided in conjunction
with i) unbundled local switching or ii) when multiple brands are required on a
single trunk.

<PAGE>   91


                                                                    APPENDIX FGA
                                                                     Page 2 of 7

                                  APPENDIX FGA


This Appendix to Attachment Compensation sets forth the terms and conditions
under which the Parties will distribute revenue from the joint provision of
Feature Group A (FGA) Switched Access Services.

These services will be provided within a Local Access and Transport Area (LATA)
and/or an Extended Area Service (EAS) arrangement. The Primary Company will
compensate the Secondary Company only to the extent that it has not already been
compensated under its interstate or intrastate access service tariffs or other
settlement/contract arrangements. This Appendix is subject to applicable
tariffs.

1.0      DEFINITIONS

1.1      Local Access and Transport Area (LATA) means a pre-established
         geographic area encompassing one or more local exchange areas within
         which a Party may provide telecommunications services.

1.2      The term Extended Area Service (EAS) as used in this Appendix means the
         provision of message telephone exchange service between two or more
         local exchange service areas without a toll charge.

1.3      Subscriber Access Lines will mean a communication facility provided
         under a general and/or exchange service tariff extended from a customer
         premise to a central office switch which may be used to make and
         receive exchange service calls, intrastate toll service or interstate
         toll service calls.

1.4      Feature Group A Switched Access Service includes all facilities and
         services rendered in furnishing FGA access service, both in EAS and
         non-EAS (i.e., LATA wide terminations) areas, in accordance with the
         schedule or charges, regulations, terms and conditions stated in the
         interstate or intrastate access service tariffs of the Parties.

1.5      The Primary Company denotes the Party with the Primary office(s).

1.6      The Primary Office is an office which: (1) directly or jointly connects
         to an interexchange carrier and /or end user: and (2) provides joint
         FGA switched access service to that interexchange carrier and/or end
         user with other end offices.

1.7      The Secondary Company denotes the Party with the secondary office(s).


<PAGE>   92


                                                                    APPENDIX FGA
                                                                     Page 3 of 7

1.8      The Secondary Office is any office involved in providing joint FGA
         switched access to an Interexchange carrier and /or end user through
         the switching facilities of the Primary office.

1.9      Revenues under this Appendix are those FGA Switched Access amounts due
         the Primary and Secondary Companies under their applicable tariffs,
         less uncollectible revenues. Revenues for any other services are not
         included. Uncollectible revenues are those revenues the Primary Company
         is unable to collect, using its regular established collection
         procedures. The Primary Company may offset uncollectibles against
         current revenue distribution.

1.10     Access Minutes or Minutes of Use (MOUs) are those minutes of use as
         described in Part 69 of the Federal Communications Commission s Rules,
         and are limited to those FGA MOUs which originate and /or terminate in
         the Secondary Office(s) covered by this Appendix.

1.11     Currently Effective Tariff Rate means the approved tariff rate 
         effective on the first day of the month for which compensation is 
         being calculated.

2.0      UNDERTAKING OF THE PARTIES

2.1      The Secondary Company will notify the Primary Company of all tariff
         rate revisions, affecting this Appendix which the FCC or other
         appropriate regulatory authority allows to take effect, at least 30
         days in advance of their effective date. Revenue distribution will be
         based on the revised rates 45 days after the effective date of the
         tariff revisions. However, if the secondary Company fails to notify the
         Primary Company of a new rate within 30 days of its effective date, the
         Primary company may delay implementation of the new rate until the next
         month s revenue distribution cycle, and will not be required to adjust
         the previous bills retroactive.

2.2      Each party will furnish to the other such information as may reasonably
         be required for the administration, computation and distribution of
         revenue, or otherwise to execute the provisions of this appendix.

3.0      ADMINISTRATION OF REVENUE DISTRIBUTION

         The Primary Company will be responsible for the administration,
         computation and distribution of the FGA access service revenues
         collected on behalf of the Secondary Company.

4.0      MINUTES OF USE  (MOUS) DEVELOPMENT

4.1      The Parties will calculate the amount of FGA revenues due each Party, 
         by determining the amount of FGA MOUs attributable to each Party as
         described


<PAGE>   93


                                                                    APPENDIX FGA
                                                                     Page 4 of 7

         below. The Primary Company will then multiply the MOUs by the rates in
         the Secondary Company's applicable tariff to determine the amounts
         tentatively due to the Secondary Company.

4.2      TERMINATING MOUS DEVELOPMENT

4.2.1    Actual monthly premium (charged at equal access end office) and
         non-premium (charged at non-equal access end offices) terminating FGA
         access MOUs for each office in the LATA or a FGA access EAS area will
         be measured by the Primary Company.

4.2.2    Where the Primary Company cannot measure or identify the terminating
         FGA MOUs by end office, terminating MOUs will be total unmeasured MOUs
         allocated to the LATA. In this event, those MOUs will be distributed
         based upon the ratio of each Party's subscriber access lines, as
         identified in Exhibit B, which is attached hereto and made a part
         hereof, to the total subscriber access lines in the FGA access area as
         determined by the Primary Company.

4.3      ORIGINATING MOUS DEVELOPMENT

4.3.1    The Primary Company will derive and distribute monthly originating FGA
         access MOUs, billed by the Primary Company, to each Secondary Company's
         end office in the EAS calling area, as identified in Exhibit A, which
         is attached hereto and made a part hereof, based upon a ration of each
         Party's subscriber access lines to the total subscriber access lines in
         the appropriate EAS area as determined by the Primary Company.

4.3.2    The parties recognize that since originating non-EAS calls to the FGA
         service area are rated and billed as intraLATA toll, such usage is
         assumed to be minimal. Therefore, originating FGA access MOUs will not
         be distributed to end offices outside an EAS calling area.

5.0      CALCULATION OF REVENUE DISTRIBUTION

5.1      The amount of premium or non-premium revenues due each party each month
         will be equal to the sum of Originating and Terminating premium or
         non-premium revenue for each end office. These revenues will be
         calculated by the Primary Company by multiplying each of the Secondary
         Company's effective interstate and/or intrastate FGA switched access
         tariff rate elements (except the Local Transport element described
         below) by the appropriate MOU calculation under Sections 4.2.1 and
         4.2.2.

5.2      Local Transport (or its equivalent under the Secondary Company's tariff
         and called Transport in this agreement) compensation will be determined
         for each company by multiplying each of the Secondary Company's
         Transport rates by the


<PAGE>   94


                                                                    APPENDIX FGA
                                                                     Page 5 of 7

         appropriate MOUs (as calculated under Sections 4.2.1 and 4.2.2.) by the
         Secondary company's percentage ownership of facilities agreed on by the
         Parties and set out in Exhibit B, which is attached hereto and made a
         part hereof.

6.0      REVENUE DISTRIBUTION AMOUNTS, MONTHLY STATEMENTS AND PAYMENTS

6.1      The Primary Company each month will calculate and prepare a monthly
         compensation statement reflecting the revenue distribution amounts for
         FGA, both EAS and non-EAS, access service due the Secondary Company.

6.2      The monthly compensation statement will show, for each Secondary 
         Office, separately:

6.2.1    The total number of non-premium or premium terminating MOUs and 
         revenue.

6.2.2    The total number on non-premium or premium originating MOUs and 
         revenues.

6.2.3    The total compensation due the Secondary Company, by rate element.

6.2.4    The number of terminating MOUs recorded by the Primary Company.

6.2.5    The number of originating MOUs estimated by the Primary Company 
         pursuant to Section 4.3 contained herein.

6.2.6    The number of access lines used to prorate originating usage pursuant 
         to Section 4.3 contained herein.

6.2.7    The percent ownership factor, if any, used to prorate Local Transport
         revenues.

6.2.8    Adjustments for uncollectibles.

6.3      Within 60 Calendar days after the end of each billing period, the
         Primary Company will remit the compensation amount due the Secondary
         Company. Where more than one compensation amount is due, they may be
         combined into a single payment.

7.0      MISCELLANEOUS PROVISIONS

7.1      This appendix will remain in effect until terminated by thirty (30) 
         calendar day s notice by either Party to the other.


<PAGE>   95


                                                                    APPENDIX FGA
                                                                     Page 6 of 7


                                    EXHIBIT A

                  EAS Locations for Originating and Terminating

                         Feature Group A Access Service


         Primary Office                              Secondary Office
            Company                                     Company

CLLI CODE  NPA-NXX                                CLLI CODE   NPA-NXX
ACCESS LINE




<PAGE>   96


                                                                    APPENDIX FGA
                                                                     Page 7 of 7

                                    EXHIBIT B

                       Location for LATA Wide Termination

                      of Feature Group A Access Service in

                              Non-EAS Calling Areas



                            SECONDARY OFFICE COMPANY

                                                 % Ownership of
CLLI CODE     NPA-NXX  Access Line               Transport Facilities      LATA






<PAGE>   97


                                                                   APPENDIX HOST
                                                                     Page 2 of 5


                                  APPENDIX HOST

This Appendix sets forth the terms and conditions under which SWBT will perform
hosting responsibilities for LSP for (1) the provision of billable message data
and/or access usage data received from such LSP for distribution to the
appropriate billing and/or processing location via SWBT's in-region network or
via the nationwide Centralized Message Distribution System (CMDS) or (2)
billable message data and/or access usage data received from other Local
Exchange Carriers (LECs) or LSPs or from CMDS to be distributed to such LSP.
This Appendix covers hosting in region (i.e., Missouri, Arkansas, Kansas,
Oklahoma and Texas) and hosting out of region. Hosting out of region is only
available to an LSP that is a Full Status Revenue Accounting Office (RAO)
company.

I.     DEFINITIONS

       A.     Access Usage Record (AUR) - a message record which contains the
              usage measurement reflecting the service feature group, duration
              and time of day for a message which is subsequently used by a LEC
              to bill access to an Interexchange Carrier (IXC).

       B.     Bellcore Client Company Calling Card and Third Number Settlement
              (BCC CATS) System - nationwide system used to produce information
              reports that are used in the settlement of LEC or LSP revenues
              recorded by one BCC (or LEC or LSP within the territory of that
              BCC) and billed to a customer of another BCC (or LEC or LSP within
              the territory of that BCC) as described in accordance with the
              Bellcore Practice BR 981-200-110.

       C.     Billable Message Record - a message record containing details of a
              completed call which has been carried by a LEC over its facilities
              or by LSP over its facilities and such record is to be used to
              bill an end user.

       D.     Centralized Message Distribution System (CMDS) - the national
              network of private line facilities used to exchange Exchange
              Message Record (EMR) formatted billing data between a company
              originating a message and the company billing for a message.

       E.     Exchange Message Record (EMR) - industry standard message format
              as described in accordance with the Bellcore Practice BR
              010-200-010 which was developed to facilitate the exchange of
              telecommunications message information.

       F.     Full Status Revenue Accounting Office (RAO) - an LSP or LEC that
              is responsible for formatting EMR records, and for editing and
              packing of such detail records into files for distribution.


<PAGE>   98


                                                                   APPENDIX HOST
                                                                     Page 3 of 5

       G.     In-Region Hosting - includes the transport, using Hosting Company
              network, of (1) billable message record data for LEC or LSP
              transported messages and/or access usage record data that
              originate in a region and are delivered by the LSP to SWBT at a
              mutually agreed upon location within the territory of SWBT to be
              sent to another LEC or LSP for billing; and (2) billable message
              record data and/or access usage data received from CMDS or another
              LEC or LSP to be delivered to the LSP for billing to its end user
              located within the five state territory of SWBT.

       H.     Out-of-Region Hosting - includes the transport, using the national
              CMDS network, of (1) billable message record data for LEC or LSP
              transported messages and/or access usage record data that
              originate out of region and are delivered by the LSP to SWBT and
              are to be sent to another LEC or LSP for billing; and (2) billable
              message record data and/or access usage data received from CMDS or
              another LEC or LSP to be delivered to the LSP for billing to its
              end user located outside SWBT's five state territory.

       I.     Non-Full Status Revenue Accounting Office (RAO) - An LSP or LEC
              that has assigned responsibility to SWBT for editing, sorting and
              placing billing message record detail and/or access usage record
              detail into packs for distribution.

II.    RESPONSIBILITIES OF THE PARTIES

       A.     All data forwarded from LSP must be in the industry standard EMR
              format in accordance with Bellcore Practice BR 010-200-010. The
              LSP is responsible to ensure all appropriate settlement plan
              indicators are included in the message detail, i.e., the Bellcore
              Client Company Calling Card and Third Number Settlement (BCC CATS)
              System. The LSP acknowledges that the only message records subject
              to this Hosting Appendix are those that arise from LEC or LSP
              transported billable messages and/or access usage records to be
              used by a LEC or LSP for the purpose of billing access to an IXC.

       B.     When LSP delivers billable message data and/or access usage data
              to SWBT which must be forwarded to another location for billing
              purposes, SWBT will accept data from the LSP, perform edits to
              make message detail and access usage records consistent with CMDS
              specifications, and use its in region data network to forward this
              data to the appropriate billing company or to access the national
              CMDS network in order to deliver this data to the appropriate
              billing and/or processing company.

              If LSP is not a Full Status RAO Company, SWBT will also sort
              billable message detail and access usage record detail by Revenue
              Accounting Office, Operating Company Number or Service Bureau and
              split data into packs for invoicing prior to using its in region
              network to forward this data to the appropriate billing company or
              to access the national CMDS network in order to deliver such data
              to the appropriate billing company.


<PAGE>   99

                                                                   APPENDIX HOST
                                                                     Page 4 of 5

       C.     For billable message data and/or access usage data received by
              SWBT for delivery to an LSP location, SWBT will use its in region
              data network to receive this data from other LECs or LSPs or from
              CMDS in order to deliver such billable message data and/or access
              usage data to the agreed upon billing LSP location.

III.   BASIS OF COMPENSATION

       LSP agrees to pay SWBT a per record charge for billable message records
       and/or access usage records that are received from LSP and destined for
       delivery to another location for billing, at the rates listed below:

              Per Record Charge
                    Full Status RAO Company
                           Hosting Company Network            $.002
                           National CMDS Network              $.005
                    Non-Full Status RAO Company
                           Hosting Company Network            $.007
                           National CMDS Network              $.010

       As part of this per record charge, SWBT will provide Confir mation and/or
       Error Reports and any Intercompany Settlement (ICS) Reports, such as the
       Bellcore Client Company Calling Card and Third Number Settlement System
       (BCC CATS), as needed.

       LSP agrees to pay SWBT a per record charge for billable message records
       and/or access usage records which are entered on a magnetic tape or data
       file for delivery to the LSP, at the rate listed below:

              Per Record Charge                               $.003

IV.    LIABILITY

       A.     Any failure to populate accurate information in accordance with 
              Section II.A. will be the responsibility of the LSP.

       B.     SWBT will not be liable for any costs incurred by the LSP when the
              LSP is transmitting data files via data lines and a transmission
              failure results in the non-receipt of data by SWBT .

       C.     SWBT SHALL NOT BE LIABLE IN ANY EVENT FOR ANY SPECIAL, INDIRECT,
              INCIDENTAL, CONSEQUENTIAL, OR EXEMPLARY DAMAGES RESULTING FROM, OR
              ARISING OUT OF, OR IN CONNECTION WITH, THIS APPENDIX.

       D.     SWBT shall not be liable for any losses or damages arising out of
              errors, interruptions, defects, failures, or malfunction of the
              services provided hereunder,


<PAGE>   100


                                                                   APPENDIX HOST
                                                                     Page 5 of 5

              including any and all associated equipment and data processing
              systems, except such losses or damages caused by the sole
              negligence of SWBT. Any losses or damage for which SWBT is held
              liable under this Appendix shall in no event exceed the amount of
              charges made for the services provided hereunder during the period
              beginning at the time SWBT receives notice of the error,
              interruption, defect, failure or malfunction to the time service
              is restored.

       E.     The LSP agrees to release, defend, indemnify, and hold harmless
              SWBT from any and all losses, damages, or other liability,
              including attorney fees, that it may incur as a result of claims,
              demands, or other suits brought by any party that arise out of the
              use of this service by the LSP, its customers or end users. The
              LSP shall defend SWBT against all end user claims just as if LSP
              had provided such service to its end users with its own employees.

       F.     The LSP also agrees to release, defend, indemnify and hold
              harmless SWBT from any claim, demand or suit that asserts any
              infringement or invasion of privacy or confidentiality of any
              person(s), caused or claimed to be caused, directly or indirectly,
              by SWBT employees and equipment associated with provision of this
              service. This includes, but is not limited to suits arising from
              disclosure of any customer specific information associated with
              either the originating or terminating numbers used to provision
              this service.

VI.    DISCLAIMER OF WARRANTIES

       SWBT MAKES NO REPRESENTATIONS OR WARRANTIES, EXPRESS OR IMPLIED,
       INCLUDING BUT NOT LIMITED TO ANY WARRANTY AS TO MERCHANTABILITY OR
       FITNESS FOR INTENDED OR PARTICULAR PURPOSE WITH RESPECT TO SERVICES
       PROVIDED HEREUNDER. ADDITIONALLY, SWBT ASSUMES NO RESPONSIBILITY WITH
       REGARD TO THE CORRECTNESS OF THE DATA SUPPLIED BY LSP WHEN THIS DATA IS
       ACCESSED AND USED BY A THIRD PARTY.

<PAGE>   101


                                                                    APPENDIX ITR
                                                                     Page 2 of 8


                                  APPENDIX ITR
                             (TRUNKING REQUIREMENTS)

This Appendix provides descriptions of the trunking requirements for the LSP and
SWBT interconnection. The attached scenarios depict the recommended trunk groups
for local, intraLATA toll, interLATA "meet point", mass calling, E911 and
Operator Services interconnection. All references to incoming and outgoing trunk
groups are from the perspective of the LSP.

I.       LOCAL TRAFFIC AND INTRALATA TOLL TRAFFIC

         (a)      The LSP Originating  (The LSP to SWBT)

                  When SWBT has a combined local and access tandem in an
                  exchange, IntraLATA Toll Traffic may be combined with the
                  Local Traffic on the same trunk group. When SWBT has more than
                  one combined local and access tandem in an exchange, the LSP
                  shall provide a separate trunk group to each SWBT tandem. When
                  there are separate SWBT access and local tandems in an
                  exchange, a separate local trunk group shall be provided to
                  the local tandem and a separate IntraLATA toll trunk group
                  shall be provided to the access tandem. This trunk group(s)
                  shall be one-way or two-way directionalized outgoing only and
                  will utilize Signaling System 7 (SS7) or multifrequency (MF)
                  protocol signaling.

         (b)      The LSP Terminating (SWBT to LSP)

                  When SWBT has a combined local and access tandem, SWBT shall
                  normally combine the Local and IntraLATA Toll Traffic over a
                  single trunk group to the LSP. When SWBT has a separate access
                  and local tandem in an exchange, a trunk group shall be
                  established from each tandem to the LSP. This trunk group(s)
                  shall be one-way or two-way directionalized incoming only and
                  will utilize SS7 or MF protocol signaling.

         (c)      Direct End Office Trunking

                  The Parties shall establish direct end office primary high
                  usage trunk groups for Local Traffic and/or IntraLATA Toll
                  Traffic when end office traffic requires twelve or more
                  trunks. If LSP has established collocation to the end office,
                  the trunks shall be provisioned over the LSP collocation
                  facility. If the LSP has no collocation facilities, SWBT shall
                  provision the trunks from the NIP to the end office. IntraLATA
                  Toll Traffic shall be provided over a separate trunk group to
                  the SWBT access tandem.



<PAGE>   102


                                                                    APPENDIX ITR
                                                                     Page 3 of 8

II.      ACCESS TOLL CONNECTING TRUNKS

         InterLATA traffic shall be transported between the LSP Central Office
         and the SWBT access tandem over a "meet point" trunk group separate
         from local and intraLATA toll traffic. The access toll connecting trunk
         group will be established for the transmission and routing of Exchange
         Access traffic between the LSP's end users and interexchange carriers
         via a SWBT access tandem. When SWBT has more than one access tandem
         within an exchange, the LSP shall utilize a single access toll
         connecting trunk group to one SWBT tandem within the exchange. This
         trunk group may be set up as one-way or two-way (two-way is preferred)
         and will utilize SS7 or MF protocol signaling. The traffic use code and
         modifier for this trunk group should be MDJ (see Scenario 1, 2, 3, or
         4).

III.     800 (888) TRAFFIC

         If the LSP chooses SWBT to handle 800 (888) database queries from its
         central office switches, all the LSP originating 800 (888) service
         queries will be routed over the InterLATA Interexchange Carrier (MDJ)
         trunk group. This traffic will include a combination of both InterLATA
         Interexchange Carrier 800 (888) service and IntraLATA LEC 800 (888)
         service that will be identified and segregated by carrier through the
         database query handled through the SWBT tandem switch.

         A separate trunk group from each Party to the other will be required
         for IntraLATA 800 service if either Party chooses to handle the 800
         database queries from its switch location. The purpose of the separate
         trunk group is to provide for the segregation of originating 800
         IntraLATA call volumes to ensure the proper billing of intercompany
         settlement compensation.

         The trunk group shall be set up as one-way outgoing only and will
         utilize SS7 protocol signaling. The traffic use code and modifier for
         this trunk group should be DD800J (see Scenario 1, 2, 3, or 4).

IV.      E911

         A segregated trunk group will be required to each appropriate E911
         tandem within the exchange in which the LSP offers the Exchange
         Service. This trunk group shall be set up as a one-way outgoing only
         and shall utilize MF CAMA signaling. The traffic use code and modifier
         for this trunk group shall be ESJ (see Scenario 1, 2, 3, or 4).

V.       MASS CALLING (PUBLIC RESPONSE CHOKE NETWORK)

         A segregated trunk group shall be required to the designated Public
         Response Choke Network tandem in each serving area. This trunk group
         shall be one-way outgoing only and shall utilize MF signaling. It is
         recommended that this group be sized as follows:



<PAGE>   103


                                                                    APPENDIX ITR
                                                                     Page 4 of 8

          <15001 access lines (AC)                            2 trunks (min)
           15001 to 25000 AC                                  3 trunks
           25001 to 50000 AC                                  4 trunks
           50001 to 75000 AC                                  5 trunks
          >75000 AC                                           6 trunks (max)

         The traffic use code and modifier for this trunk group shall be TOCRJ
(see Scenario 1, 2, 3, or 4).

VI.      OPERATOR SERVICES

         (a)      No Operator Contract:

                  Inward Operator Assistance (Toll Center (TC) Code plus 121) 
                  - The LSP may choose from two interconnection options
                  for Inward Operator Assistance as follows:

                  Option 1 - Interexchange Carrier (IXC) Carrier

                  The LSP may utilize the Interexchange Carrier Network (see
                  Scenario 6). The LSP operator will route its calls requiring
                  inward operator assistance through its designated IXC POP to
                  SWBT's TOPS tandem. SWBT shall route its calls requiring
                  inward operator assistance to the LSP's Designated Operator
                  Switch (TTC) through the designated IXC POP.

                  Option 2 - The LSP Operator Switch

                  The LSP reports its switch as the designated serving operator
                  switch (TTC) for its NPA-NXXs and requests SWBT to route its
                  calls requiring inward operator assistance to the LSP. This
                  option requires a segregated two-way (with MF signaling) trunk
                  group from SWBT's Access Tandem to the the LSP switch. The
                  traffic use code and modifier for this trunk group should be
                  OAJ (see Scenario 7). The LSP's operator will route its calls
                  requiring inward operator assistance to SWBT's operator over
                  an IXC network.

         (b)      Operator Contract with SWBT:

                  (i)      Directory Assistance (DA):

                           The LSP may contract for DA services only. A
                           segregated trunk group for these services would be
                           required to SWBT's TOPS tandem. This trunk group is
                           set up as one-way outgoing only and utilizes MF and
                           Operator Services signaling. The traffic use code and
                           modifier for this trunk group should be DAJ (see
                           Scenario 5).


<PAGE>   104


                                                                    APPENDIX ITR
                                                                     Page 5 of 8

                  (ii)     Directory Assistance Call Completion (DACC):

                           The LSP contracting for DA services may also contract
                           for DACC. This requires a segregated one-way trunk
                           group to SWBT's TOPS tandem. This trunk group is set
                           up as one-way outgoing only and utilizes MF
                           signaling. The traffic use code and modifier for this
                           trunk group should be DACCJ (see Scenario 5).

                  (iii)    Busy Line Verification:

                           When SWBT's operator is under contract to verify the
                           LSP's end user loop, SWBT will utilize a segregated
                           one-way with MF signaling trunk group from SWBT's
                           Access Tandem to the the LSP switch. The traffic use
                           code and modifier for this trunk group should be VRJ
                           (see Scenario 5).
                  (iv)     Operator Assistance (0+, 0-):

                           This service requires a one-way trunk group from the
                           the LSP switch to SWBT's TOPS tandem. Two types of
                           trunk groups may be utilized. If the trunk group
                           transports DA/DACC, the trunk group will be
                           designated as ETCMFJ (0-, 0+, DA, DACC) (see Scenario
                           5). If DA is not required or is transported on a
                           segregated trunk group, then the group will be
                           designated as ETCM2J (see Scenario 5). MF and
                           Operator Services signaling will be required on the
                           trunk group.

VII.     Trunk Design Blocking Criteria

         Trunk forecasting and servicing for the Local and IntraLATA Toll trunk
         groups shall be based on the industry standard objective of 2% overall
         time consistent average busy season busy hour loads (1% from the End
         Office to the Tandem and 1% from the Tandem to the End Office based on
         Neil Wilkinson B.01M [Medium Day-to-Day Variation] until traffic data
         is available ). Listed below are the trunk group types and their
         objectives:

         Trunk Group Type                  Blocking Objective (Neil Wilkinson M)
- --------------------------------------------------------------------------------
         Local Tandem                                         1%
         Local Direct                                         2%
         IntraLATA Interexchange                              1%
         911                                                  1%
         Operator Services (DA/DACC)                          1%
         Operator Services (0+, 0-)                           0.5%
         InterLATA Tandem                                     0.5%



<PAGE>   105


                                                                    APPENDIX ITR
                                                                     Page 6 of 8

VIII.    FORECASTING/SERVICING RESPONSIBILITIES

         Both Parties agree to provide an initial forecast for establishing the
         initial interconnection facilities. Subsequent forecasts will be
         provided on a semi-annual basis concurrent with the publication of the
         SWBT General Trunk Forecast including yearly forecasted trunk
         quantities for all trunk groups described in this Appendix for a
         minimum of three years and the use of Common Language Location
         Identifier (CLLI-MSG) which is described in Bellcore documents
         BR795-100-100 and BR795-400-100. Trunk servicing will be performed on a
         monthly basis at a minimum.

         SWBT shall be responsible for forecasting and servicing the trunk
         groups terminating to the LSP. The LSP shall be responsible for
         forecasting and servicing the trunk groups terminating to SWBT end
         users and/or to be used for tandem transit to other provider's
         networks, operator services and DA service, and interLATA toll service.
         Standard trunk traffic engineering methods will be used as described in
         Bell Communications Research, Inc. (Bellcore) document SR-TAP-000191,
         Trunk Traffic Engineering Concepts and Applications.

IX.      TRUNK SERVICING

         1.       Orders between the Parties to establish, add, change or
                  disconnect trunks shall be processed by use of an Access
                  Service Request ("ASR").

         2.       All Parties shall jointly manage the capacity of local
                  Interconnection Trunk Groups. Either Party may send the other
                  Party an ASR to initiate changes to the Local Interconnection
                  Trunk Groups that the ordering Party desires based on the
                  ordering Party's capacity assessment. The receiving Party will
                  issue a Firm Order Confirmation ("FOC") and a Design Layout
                  Record ("DLR") to the ordering Party within five (5) business
                  days after receipt of the ASR.

         3.       Orders that comprise a major project (i.e., new switch
                  deployment) shall be submitted in a timely fashion, and their
                  implementation shall be jointly planned and coordinated.

         4.       SWBT will process trunk service requests submitted via a
                  properly completed ASR within twenty (20) business days of
                  receipt of such ASR. Facilities must also be in place before
                  trunk orders can be completed.

         5.       In the event that a Party requires trunk servicing within
                  shorter time intervals than those provided for in this Article
                  XI due to a bona fide end user demand, such Party may
                  designate its ASR as an "Expedite" and the other Party shall
                  use best efforts to issue its FOC and DLR and install service
                  within the requested interval.

         6.       Each Party shall be responsible for engineering their 
                  networks on their side of the NIP.



<PAGE>   106


                                                                    APPENDIX ITR
                                                                     Page 7 of 8

X.       SERVICING OBJECTIVE/DATA EXCHANGE

         Each Party agrees to service trunk groups to the foregoing blocking
         criteria in a timely manner when trunk groups exceed measured blocking
         thresholds on an average time consistent busy hour for a 20 business
         day study period. Upon request, each Party will make available to the
         other, trunk group measurement reports for trunk groups terminating in
         the requesting Party's network. These reports will contain offered
         load, measured in CCS (100 call seconds), that has been adjusted to
         consider the effects of overflow, retrials and day-to-day variation.
         They will also contain overflow CCS associated with the offered load,
         day-to-day variation, peakedness factor, the date of the last week in
         the four week study period and the number of valid days of measurement.
         These reports shall be made available at a minimum on a semi-annual
         basis upon request.

XI.      SPECIFICATIONS

         All DS-1 and DS-3 facilities utilized for trunking established or
         employed by the Parties for purposes of this STC shall meet the
         specifications set forth in SWBT's TP-76625 dated June, 1990 and
         TP-76839 dated January, 1996.

XII.     TRUNK FACILITY UNDER UTILIZATION

         At least once a year the Parties shall exchange trunk group measurement
         reports as detailed above for trunk groups terminating to the other
         Party's network. Each Party will determine the required trunks for each
         of the other Party's trunk groups for the previous 12 months. Required
         trunks will be based on the Blocking Objectives under "Trunk Design
         Blocking Criteria" above and time consistent average busy hour usage
         measurements from the highest 4 consecutive week (20 business day)
         study. Trunk groups with excess capacity will be identified to the
         other Party as eligible for downsizing. Excess capacity exists when a
         trunk group, on a modular trunk group design basis, has 48 trunks (2
         modular digroups) or 10%, whichever is larger, over the required number
         of trunks.

         The party with excess trunking capacity will assess the trunk capacity
         based on forecasted requirements and agrees to disconnect trunks in
         excess of forecasted requirements for the next 12 months. If after 12
         months the trunk group continues to have excess capacity the party
         agrees to take timely steps to disconnect all excess capacity.

XIII.    Where available and upon the request of the other Party, each Party
         shall cooperate to ensure that its trunk groups are configured
         utilizing the B8ZS ESF protocol for 64 kbps clear channel transmission
         to allow for ISDN interoperability between the Parties' respective
         networks.



<PAGE>   107


                                                                    APPENDIX ITR
                                                                     Page 8 of 8

XIV.     INSTALLATION,  MAINTENANCE,  TESTING AND REPAIR. SWBT's standard
         intervals for Feature Group D Switched  Exchange  Access Services will
         be used for  Interconnection  trunks as  specified in the most current
         SWBT Accessible Letter, currently SWA96-036, dated April 15, 1996. The
         LSP  shall  meet  the same  intervals  for  comparable  installations,
         maintenance,  joint testing, and repair of its facilities and services
         associated with or used in conjunction with  Interconnection  or shall
         notify  SWBT  of  its  inability  to do so  and  will  negotiate  such
         intervals in good faith.
<PAGE>   108


                                                       APPENDIX ITR - SCENARIOS
                                                                   PAGE 1 of 7

                                   SCENARIO 1

              SINGLE RATE AREA - COMBINED SWBT LOCAL/ACCESS TANDEM
                WITHOUT DIRECT END OFFICE, ILEC OR IXC TRUNKING

                                    [CHART]





TRAFFIC USE/MODIFIER            DESCRIPTION

1. DDJ                          INTRALATA AND LOCAL (SS7 SIGNALING)
2. TCJ                          INTRALATA AND LOCAL (SS7 SIGNALING)
3. TOCRJ                        MASS CALLING (MF SIGNALING)
4. DD800J                       INTRALATA 800 (MAXIMIZER 800)(SS7 SIGNALING) #
5. MDJ                          INTERLATA ONLY (MF SIGNALING) @
6. MDJ                          INTERLATA ONLY (SS7 SIGNALING)
7. ESJ                          EMERGENCY SERVICE (MF SIGNALING)

@  Required at the Dallas 4 ESS switch only for 10XXXX # cut through and Feature
   Group B over D.

#  Required if SWBT does not perform the database query for the LSP.




                                                                Revised 6/17/96
                                                                LSP1.AF3



<PAGE>   109

                                                       APPENDIX ITR - SCENARIOS
                                                                   PAGE 2 of 7




                                   SCENARIO 2

              SINGLE RATE AREA - COMBINED SWBT LOCAL/ACCESS TANDEM
               WITH SOME DIRECT END OFFICE, ILEC AND IXC TRUNKING



                                    [CHART]
















TRAFFIC USE/MODIFIER         DESCRIPTION

1. IEJ                       LOCAL ONLY (SS7 SIGNALING)
2. IEJ                       LOCAL ONLY (SS7 SIGNALING)
3. DDJ                       INTRALATA AND LOCAL (SS7 SIGNALING)
4. TCJ                       INTRALATA AND LOCAL (SS7 SIGNALING)
5. TOCRJ                     MASS CALLING (MF SIGNALING)
6. DD800J                    INTRALATA 800 (MAXIMIZER 800) (SS7 SIGNALING) #
7. MDJ                       INTERLATA ONLY (MF SIGNALING) @
8. MDJ                       INTERLATA ONLY (SS7 SIGNALING)
9. ESJ                       EMERGENCY SERVICE (MF SIGNALING)

@  Required at the Dallas 4 ESS switch only for 10XXXX # cut through and Feature
   Group B over D.

#  Required if SWBT does not perform the database query for the LSP.

                                                                Revised 6/17/96
                                                                LSP2.AF3



<PAGE>   110


                                                       APPENDIX ITR - SCENARIOS
                                                                   PAGE 3 of 7


                                   SCENARIO 3

                SINGLE RATE AREA - SEPARATE SWBT LOCAL AND ACCESS
             TANDEMS WITHOUT DIRECT END OFFICE, ILEC OR IXC TRUNKING



                                    [CHART]
















TRAFFIC USE/MODIFIER            DESCRIPTION

1. TOJ                          LOCAL ONLY (SS7 SIGNALING)
2. TGJ                          LOCAL ONLY (SS7 SIGNALING)
3. TOCRJ                        MASS CALLING (MF SIGNALING)
4. DD800J                       INTRALATA 800 (MAXIMIZER 800) (SS7 SIGNALING) #
5. DDJ                          INTRALATA ONLY (SS7 SIGNALING)
6. TCJ                          INTRALATA ONLY (SS7 SIGNALING)
7. MDJ                          INTERLATA ONLY (SS7 SIGNALING)
8. ESJ                          EMERGENCY SERVICE (MF SIGNALING)

#  Required if SWBT does not perform the database query for the LSP.





                                                                Revised 12/30/96
                                                                LSP3.AF3



<PAGE>   111

                                                       APPENDIX ITR - SCENARIOS
                                                                   PAGE 4 of 7


                                   SCENARIO 4

                SINGLE RATE AREA - SEPARATE SWBT LOCAL AND ACCESS
           TANDEMS WITH SOME DIRECT END OFFICE, ILEC AND IXC TRUNKING




                                    [CHART]
















TRAFFIC USE/MODIFIER           DESCRIPTION

1. IEJ                         LOCAL ONLY (SS7 SIGNALING)
2. IEJ                         LOCAL ONLY (SS7 SIGNALING)
3. TOJ                         LOCAL ONLY (SS7 SIGNALING)
4. TGJ                         LOCAL ONLY (SS7 SIGNALING)
5. TOCRJ                       MASS CALLING (MF SIGNALING)
6. DD800J                      INTRALATA 800 (MAXIMIZER 800) (SS7 SIGNALING) #
7. DDJ                         INTRALATA ONLY (SS7 SIGNALING)
8. TCJ                         INTRALATA ONLY (SS7 SIGNALING)
9. MDJ                         INTERLATA ONLY (SS7 SIGNALING)
10. ESJ                        EMERGENCY SERVICE (MF SIGNALING)

#  Required if SWBT does not perform database query for the LSP.



                                                               Revised 12/30/96
                                                               LSP4.AF3



<PAGE>   112

                                                       APPENDIX ITR - SCENARIOS
                                                                   PAGE 5 of 7




                                   SCENARIO 5

              SINGLE RATE AREA - COMBINED SWBT LOCAL/ACCESS TANDEM
            WHERE SWBT IS THE OPERATOR SERVICES PROVIDER FOR THE LSP



                                    [CHART]




















TRAFFIC USE/MODIFIER  DESCRIPTION

1. VRJ                BUSY LINE VERIFICATION (MF SIGNALING) #
2. DAJ or DACCJ       DIRECTORY ASSISTANCE or DIRECTORY ASSISTANCE CALL
                      COMPLETION (MF SIGNALING, OPERATOR SERVICES SIGNALING)
3. ETCM2J             0-, 0+ COMBINED COIN AND NONCOIN (MF SIGNALING, OPERATOR
                      SERVICES SIGNALING)
4. ETCMFJ             0-, 0+, DA, DACC COMBINED COIN AND NONCOIN (MF SIGNALING,
                      OPERATOR SERVICES SIGNALING)

# Busy Line Verification is sometimes trunked out from the TOPS Tandem rather
than the Access Tandem.





                                                                Revised 1/7/97
                                                                LSP5.AF3



<PAGE>   113

                                                      APPENDIX ITR - SCENARIOS
                                                                   PAGE 6 OF 7



                                   SCENARIO 6

              SINGLE RATE AREA - COMBINED SWBT LOCAL/ACCESS TANDEM
          WHERE SWBT IS NOT THE OPERATOR SERVICES PROVIDER FOR THE LSP

                         121 INWARD OPERATOR ASSISTANCE






                                    [CHART]










Note:  THIS SCENARIO WOULD USE EXISTING INTEREXCHANGE CARRIER NETWORK.















                                                                REVISED 6/17/96
                                                                LSP6.AF3



<PAGE>   114
                                                    APPENDIX ITR - SCENARIOS
                                                                   PAGE 7 OF 7




                                   SCENARIO 7

              SINGLE RATE AREA - COMBINED SWBT LOCAL/ACCESS TANDEM
                WHERE SWBT IS NOT THE OPERATOR SERVICES PROVIDER
               FOR THE LSP AND THE LSP'S SWITCH IS THE DESIGNATED
                 OPERATOR SWITCH (TTC) FOR 121 INWARD ASSISTANCE




                                    [CHART]

















TRAFFIC USE/MODIFIER        DESCRIPTION
1. OAJ                      ACCESS TO INWARD OPERATOR (121) (MF SIGNALING)













                                                                REVISED 6/17/96
                                                                LSP7.AF3





<PAGE>   115
                                                                   APPENDIX LIDB
                                                                          Page 2


                                  APPENDIX LIDB

             AGREEMENT FOR THE PROVISION OF DATA BASE ADMINISTRATION
                                       AND
                    LINE INFORMATION DATA BASE (LIDB) STORAGE

This Appendix, between SWBT and LSP sets forth the terms and conditions upon
which SWBT will provide data base administration to store LSP's line/billing
records in SWBT's Line Information Data Base (LIDB).

WHEREAS, SWBT owns and maintains a Line Validation Administration System (LVAS)
that provides facilities for adding, deleting, and changing information in LIDB;
and

WHEREAS, SWBT maintains LIDB for various purposes, including the validation of
alternately billed service (ABS) requests and the provision of other services;
and

WHEREAS LSP desires to have SWBT use LVAS to administer LSP's line information
cords for the provision of services set forth in the exhibits attached to this
Appendix; and

WHEREAS SWBT is willing to provide, where equipment, processing capability and
hardware configurations permit, such LVAS services and LIDB storage for LSP; and

WHEREAS, SWBT owns and maintains a Sleuth System that provides facilities for
ABS fraud monitoring; and

WHEREAS LSP desires SWBT to use its Sleuth System for ABS fraud monitoring of
its telecommunications traffic.

NOW, THEREFORE, in consideration of the mutual promises and undertakings made,
the parties agree as follows:

1.       DEFINITIONS

         As used herein and for the purpose of this Appendix, the following
         terms shall have the meanings set forth below:
     
         A.       Alternate Billing Services (ABS) - A service that allows end
                  users to bill calls to accounts that may not be associated
                  with the originating line. There are three types of ABS calls:
                  calling card, collect and third number billed calls.

         B.       Billed Number Screening (BNS) - A process which utilizes a
                  database to determine specific characteristics and/or end user
                  preferences with respect to a billed number.


<PAGE>   116


                                                                   APPENDIX LIDB
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         C.       Calling Card Service (CCS) - A service which enables a calling
                  customer to bill a telephone call to a calling card number
                  with or without the help of an operator.

         D.       Data Base - An integrated collection of related data. In the
                  case of the LIDB, the data base is the line number and related
                  line information.

         E.       Data Base Administration Center (DBAC) - The LIDB input center
                  where the LVAS facility and administrative personnel are
                  currently located.

         F.       Exchange - For the purpose of this Appendix, a specific 
                  NPA-NXX combination.

         G.       Group  Record - Information in LIDB or LVAS that is common 
                  to all lines or billing records in an NPA-NXX or NPA-RAO.

         H.       LIDB Editor - A database editor located at the SCP where LIDB
                  resides. LIDB ditor provides emergency access to LIDB that
                  bypasses the service management system for LIDB.

         I.       Line Validation Administration System (LVAS) - An off-line
                  administrative system, used by SWBT to add, delete and change
                  information in LIDB.

         J.       Line Information Data Base (LIDB) - The line information
                  database, which is an ANSI SS7 database system, functions as a
                  centralized repository for data storage and retrieval. LIDB
                  supports validation and recording of ABS requests. LIDB also
                  supports storage, retrieval and recording capabilities for
                  other information that can be associated with an end user's
                  line. Examples of such information are, or are expected to be,
                  originating screening information, ZIP code data and calling
                  name.

         K.       Line Record - Information in LIDB or LVAS that is specific to 
                  a single telephone number or special billing number.

         L.       Personal Identification Number (PIN) - A confidential four
                  digit code number provided to a calling card customer to
                  prevent unauthorized use of his/her calling card number. The
                  PIN is stored in the LIDB for those line numbers that have an
                  associated calling card.

         M.       Response - A single response in a set of predefined expected
                  responses to a request for information contained in a query
                  from a computer processor.

         N.       Toll Billing Exception (TBE) - A LIDB option that allows 
                  end users to restrict


<PAGE>   117


                                                                   APPENDIX LIDB
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                  third number billing or collect calls to their lines.

         O.       Service Management System (SMS) - An off-line system used to
                  access, create, modify, or update information in LIDB. For the
                  purposes of this appendix, the SMS for LIDB is LVAS.

         P.       Sleuth - An off-line administration system that SWBT uses to
                  monitor suspected occurrences of ABS-related fraud. Sleuth
                  uses a systematic pattern analysis of query message data to
                  identify potential incidences requiring fraud investigation.
                  Detection parameters are based upon vendor recommendations and
                  SWBT's analysis of collected data and are subject to change
                  from time to time.

         Q.       Special Billing Number (SBN) Account Groups - Line records in
                  LIDB that are based on an NPA-RAO numbering format. NPA-RAO
                  numbering formats are similar to NPA-NXX formats except that
                  the fourth digit of an NPA-RAO line record is either a zero
                  (0) or a one (1).

         R.       Tape Load Facility - A separate data entry point at the SCP
                  where LIDB resides. The Tape Load Facility provides direct
                  access to LIDB for data administrationadministation that
                  bypasses the service management system for SWBT's LIDB.

         S.       Translation Type - A code in the Signaling Connection Control
                  Point (SCCP) of the SS7 signaling message. Translation Types
                  are used for routing LIDB queries. Signal Transfer Points
                  (STP's) use Translation Types to identify the routing table
                  used to route a LIDB query. All LIDB queries against the same
                  exchange and Translation Type are routed to the same LIDB.

2.       General Description

         A.       SWBT's LIDB is connected directly to a service management
                  system (i.e., LVAS), a database editor (i.e., LIDB Editor),
                  and a tape load facility. Each of these facilities, processes,
                  or systems, provide SWBT with the capability of creating,
                  modifying, changing, or deleting, line/billing records in
                  LIDB. SWBT's LIDB is also connected directly to an adjunct
                  fraud monitoring system (i.e., Sleuth).

         B.       SWBT will provide LSP with access to LVAS, LIDB Editor, and
                  tape load facility as set forth in this Appendix and the
                  Exhibit or Exhibits attached hereto. SWBT warrants that the
                  manner in which it provides such access to LSP will be
                  equivalent to the manner in which SWBT provides such access to
                  itself.


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                                                                   APPENDIX LIDB
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         C.       SWBT will also provide LSP with fraud alerts from Sleuth as
                  set forth in this Appendix and in Exhibit IV (Sleuth). SWBT
                  warrants that it will provide fraud alerts to LSP using the
                  same fraud monitoring parameters as SWBT uses for itself.

         D.       From time-to-tome, SWBT enhances its LIDB to create new
                  services and/or LIDB functionalities. Such enhancements may
                  involve the creation of new line-level or group-level data
                  elements in LIDB. SWBT will coordinate with LSP to provide LSP
                  with the opportunity to update its data concurrent with SWBT's
                  updates of SWBT's own data. Both parties understand and agree
                  that some LIDB enhancements will require LSP to update its
                  line/billing records with new or different information.

         E.       Charges for the provisioning of Data Base Administration and
                  LIDB Storage are set forth in Exhibit II (Basis of
                  Compensation).

3.       Service Description

         3.1      LVAS

                  LVAS provides LSP with the capability to access, create,
modify or update information in LIDB. LVAS has two electronic interfaces. These
interfaces are the Service Order Entry Interface and the Interactive Interface.

                  3.1.1    Service Order Entry Interface

                           (A)      The Service Order Entry Interface provides
                                    LSP with unbundled access to SWBT's LVAS
                                    that is equivalent to SWBT's own service
                                    order entry process to LVAS. Service Order
                                    Entry Interface allows LSP to electronically
                                    transmit properly formatted records from
                                    LSP's service order process into LVAS.

                           (B)      LSP's access to the Service Order Entry
                                    Interface will be through a remote access
                                    facility (RAF). The RAF will provide SWBT
                                    with a security gateway for LSP access to
                                    the Service Order Entry Interface. The RAF
                                    will verify the validity of LSP's
                                    transmissions and limit LSP's access to
                                    SWBT's Service Order Entry Interface to
                                    LVAS. LSP does not gain access to any other
                                    SMS, interface, database, or operations
                                    support system through this Appendix.

                           (C)      SWBT will provide LSP with the file transfer
                                    protocol specifications LSP will use to
                                    administer LSP's data over the


<PAGE>   119


                                                                   APPENDIX LIDB
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                                    Service Order Entry Interface. LSP
                                    acknowledges that transmission in such
                                    specified protocol is necessary for SWBT to
                                    provide LSP with Data Base Administration
                                    and Storage.

                           (D)      LSP can choose the Service Order Entry
                                    Interface as its only interface to LVAS and
                                    LIDB or the LSP can choose to use this
                                    interface in conjunction with any other
                                    interface that SWBT provides under this
                                    Appendix except the Manual Interface.

                           (E)      SWBT will provide LSP with SWBT-specific
                                    documentation for properly formatting the
                                    records LSP will transmit over the Service
                                    Order Entry Interface.

                           (F)      LSP understands that its record access
                                    through the Service Order Entry Interface
                                    will be limited to its own line/billing
                                    records.

                  3.1.2    Interactive Interface

                           (A)      The Interactive Interface provides LSP with
                                    unbundled access to SWBT's LVAS that is
                                    equivalent to SWBT's access at its LIDB
                                    DBAC. Interactive Interface provides LSP
                                    with the ability to have its own personnel
                                    access LSP's records via an application
                                    screen that is presented on a computer
                                    monitor. Once LSP has accessed one of its
                                    line/billing records, LSP can perform all of
                                    the data administration tasks SWBT's LIDB
                                    DBAC personnel can perform on SWBT
                                    line/billing records.

                           (B)      SWBT will provide LSP with Interactive
                                    Interface through a modem. LSP understands
                                    that its record access through the
                                    Interactive Interface will be limited to its
                                    own line/billing records.

                           (C)      LSP will use hardware and software that is
                                    compatible with LVAS hardware and software.

                           (D)      LSP can choose to request the Interactive
                                    Interface as its only interface to LVAS and
                                    LIDB or the LSP can choose to use this
                                    interface in conjunction with any other
                                    interface that SWBT provides under this
                                    Appendix except the Manual Interface.

                           (E)      SWBT will provide LSP with SWBT-specific
                                    documentation in the form of screen prints
                                    and prints of help screens.



<PAGE>   120


                                                                   APPENDIX LIDB
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                  3.1.3    Manual Interface

                           (A)      Manual Interface is available only if the
                                    LSP has 1,000 line/billing records or less.
                                    Manual Interface allows LSP to fax updates
                                    to SWBT's LIDB DBAC. SWBT's LIDB DBAC
                                    personnel will manually enter these faxed
                                    updates into LVAS for LSP.

                           (B)      Manual Interface is not available with any 
                                    other interface SWBT provides under this
                                    Appendix.

                           (C)      LSP understands that its record access
                                    through the Manual Interface will be limited
                                    to its own line/billing records.

         3.2      Tape Load Facility Interface

                  (A)      Tape Load Facility Interface provides LSP with
                           unbundled access to SWBT's Tape Load Facility in the
                           same manner that SWBT accesses this facility. Tape
                           Load Facility Interface allows LSP to create and
                           submit magnetic tapes for input into LIDB.

                  (B)      The Tape Load Facility Interface is not an interface
                           to LVAS. The Tape Load Facility Interface is an entry
                           point to LIDB at the SCP where LIDB resides.

                  (C)      The Tape Load Facility Interface is available only
                           when the amount of information is too large for LVAS
                           to accommodate. Both parties agree that these
                           situations normally occur during the initial load of
                           LSP's information into LIDB or when LIDB is updated
                           for a new product. The Tape Load Facility Interface
                           is not available for ongoing updates of information.
                           LSP may request the Tape Load Facility Interface only
                           when its updates exceed 100,000 line/billing records
                           over and above the LSP's normal daily update
                           processing.

                  (D)      LSP will create its own tapes in formats specified in
                           GR-446-CORE, Issue 2, June 1994, as revised. Such
                           tapes will only include information associated with
                           LSP's line/billing records.

                  (E)      LSP will deliver a separate set of tapes, each having
                           identical information to each SCP node on which LIDB
                           resides. SWBT will provide LSP with the name and
                           address of the SWBT employee designated to receive
                           the tapes at each location.


<PAGE>   121


                                                                   APPENDIX LIDB
                                                                          Page 8


                  (F)      In addition to the tapes LSP will create and deliver 
                           to the SCP node locations, LSP shall deliver an
                           additional set of tapes to the LVAS System
                           Administrator so that SWBT can load LSP's updates
                           into LVAS. LSP understand that these additional tapes
                           must contain information identical to the tapes
                           delivered to the SCP nodes, but that the format will
                           differ. SWBT shall provide LSP SWBT-specific
                           documentation for record formations of these
                           additional tapes. SWBT shall use these tapes to
                           create LSP records in LVAS that correspond with the
                           records being loaded into LIDB using the Tape Load
                           Facility Interface. SWBT shall provide LSP with the
                           name and address of the SWBT System Administrator to
                           whom the LVAS update tapes should be sent.

                  (G)      SWBT and LSP shall negotiate mutually agreed upon
                           dates and times for tape loads of LSP data when such
                           loads are the result of an LSP request.

                  (H)      LSP understands and agrees that its record access
                           through the Tape Load Facility Interface is only for
                           LSP's own line/billing records. LSP warrants that it
                           shall not use the Tape Load Facility Interface to
                           modify any group record. LSP further warrants that it
                           shall not use the Tape Load Facility Interface to
                           modify any line/billing record not belonging to LSP.

         3.3      LIDB Editor Interface

                  (A)      LIDB Editor Interface provides LSP with unbundled
                           access to SWBT's LIDB Editor equivalent to SWBT's
                           manner of access. LIDB Editor provides LSP with
                           emergency access to LIDB only when LVAS is unable to
                           access LIDB or is otherwise inoperable.

                  (B)      LIDB Editor Interface is not an interface to LVAS.
                           LIDB Editor is an SCP tool accessible only by
                           authorized SWBT employees. LSP shall have access to
                           SWBT employees authorized to access LIDB Editor
                           during the same times and under the same conditions
                           that SWBT has access to LIDB Editor.

                  (C)      LSP understands that its record access through the
                           LIDB Editor Interface is limited to its own
                           line/billing records.

         3.4      Audits

                  SWBT shall provide LSP with access equivalent to SWBT's own 
                  access


<PAGE>   122


                                                                   APPENDIX LIDB
                                                                          Page 9


                  to LVAS audit functionalities.

                  3.4.1    LIDB Audits

                           (A)      This audit is between LVAS and LIDB. This
                                    audit verifies that LVAS records match LIDB
                                    records. The LIDB Audit is against all line
                                    records and group record information in LVAS
                                    and LIDB, regardless of data ownership.

                           (B)      SWBT shall run the LIDB audit continuously
                                    throughout each and every day.

                           (C)      SWBT shall create a "variance file" of all
                                    LSP records that fail the LIDB audit. LSP
                                    can access these files through the
                                    Interactive Interface.

                           (D)      LSP shall investigate accounts that fail the
                                    LIDB audit and correct any discrepancies as
                                    set forth in paragraph 3(H). LSP shall
                                    correct all discrepancies using the LVAS
                                    interface(s) LSP has requested under this
                                    Appendix.

                  3.4.2    Billing System Audit

                           (A)      This type of audit is between LVAS and
                                    SWBT's billing system(s). This audit
                                    verifies that LVAS records match SWBT's
                                    billing system records.

                           (B)      SWBT shall provide LSP with access
                                    equivalent to SWBT's own access to the
                                    billing system audit functionality. SWBT
                                    shall provide LSP with a file containing LSP
                                    records in LIDB. LSP shall specify if the
                                    billing system audit tape will be delivered
                                    by either magnetic tape or electronically
                                    over the Service Order Entry Interface.

                           (C)      LSP shall audit its LIDB accounts against
                                    LSP's billing system and correct any
                                    discrepancies as set forth in paragraph
                                    3(H). LSP shall correct all discrepancies
                                    using the LVAS interface(s) LSP has
                                    requested under this Appendix.

                           (C)      SWBT shall provide LSP scheduled and 
                                    unscheduled billing system audits as set
                                    forth below:

                                    (1)     Scheduled Audits


<PAGE>   123


                                                                   APPENDIX LIDB
                                                                         Page 10


                                            SWBT shall provide LSP with a
                                            billing system audit file twice per
                                            year. Such audit files will
                                            represent LSP's entire data store in
                                            LVAS. The Parties shall mutually
                                            agree upon the dates such audit
                                            files will be provided.

                                    (2)     Unscheduled Audits

                                            LSP can request additional audit
                                            files and SWBT will work
                                            cooperatively to accommodate all
                                            reasonable LSP requests for such
                                            additional audit files. Charges for
                                            additional audit files shall apply
                                            as set forth in Exhibit II (Basis
                                            for Compensation).

                  3.5      Sleuth

                           (A)      Sleuth notification provides LSP with Sleuth
                                    alert messages. Sleuth alert messages
                                    indicate potential incidences of ABS-related
                                    fraud for investigation.

                           (B)      Sleuth historical reports are available to 
                                    LSP as set forth in Exhibit IV (Sleuth).

3.       Manner of Provisioning

         (A)      SWBT shall provide to LSP, on request, SWBT-specific
                  documentation regarding record formatting and associated
                  hardware requirements for LSP to access each of the interfaces
                  SWBT provides for LIDB data administration.

         (B)      LSP shall obtain, at its own expense, all necessary 
                  documentation produced by non-SWBT entities such as Bellcore.

         (C)      Magnetic tapes submitted by LSP must conform to the hardware
                  specifications of each SCP node where LIDB resides. This
                  includes 9-track and 8mm tapes as well as other site-specific
                  limitations. SWBT shall provide LSP with all magnetic tape
                  hardware requirements upon request. LSP shall create the
                  magnetic tapes its submits for input into LIDB and LVAS over
                  the tape load interface.

         (D)      SWBT shall input information provided by LSP into LIDB for the
                  NPA-NXXs and/or NPA-RAOs set forth in Exhibit I, EXCHANGES TO
                  BE ADMINISTERED, attached hereto and made a part hereof. LSP
                  shall provide all information needed by SWBT to support the
                  services being requested. This information may include, but is
                  not limited to, Calling Card Service information, Toll Bill
                  Exception information (such as restrictions on collect


<PAGE>   124


                                                                   APPENDIX LIDB
                                                                         Page 11

                 and third number billing), class of service information,
                 originating line number screening information, ZIP code
                 information, and calling name information.

         (E)     LSP shall furnish, prior to the initial LVAS load, and as
                 requested by SWBT thereafter, the following forecast data:

                 - the number of working lines per account group 
                 - the number of working line numbers to be established 
                 - the average number of monthly changes to these records 
                 - the number of busy hour queries, by query type 
                 - the number of annual queries by query type

                 If SWBT, at its discretion, determines that it lacks adequate
                 storage, or processing capability, prior to the initial
                 loading of LSP information, SWBT shall notify LSP of its
                 intent to not provide to LSP the Services under this Appendix
                 and this Appendix will be void.

         (F)     LSP shall furnish all line records and group records in a
                 format required by SWBT to establish records in LIDB for all
                 working line numbers, not just line numbers associated with
                 calling card PIN or Toll Billing Exceptions (TBE).

         (G)     LSP acknowledges that SWBT's LIDB is accessible by many
                 telecommunications companies and that these telecommunications
                 companies expect a high degree of accuracy in the response
                 information provided to their queries. LSP shall administer its
                 data in such a manner that SWBT's accuracy of response
                 information is not adversely impacted.

         (H)     LSP shall verify to SWBT the line information data residing in
                 LVAS by reviewing the listing of line information data provided
                 by SWBT's billing system audit file. LSP shall provide to SWBT
                 all additions, deletions, and corrections resulting from its
                 verification on, or before, the fourteenth business day
                 following its receipt of line information verification reports
                 produced by SWBT for audit processes.

         (I)     SWBT shall provide the functionality needed to perform certain
                 query/response functions on a call-by-call basis for the
                 line/billing records of LSP that reside in SWBT's LIDB. Those
                 query/response functions SWBT will perform are set forth in the
                 Exhibits.

         (J)     With respect to all matters covered by this Appendix, each
                 Party shall adopt and comply with SWBT standard operating
                 methods and procedures and shall observe the rules and
                 regulations which cover the administration of LVAS service and
                 the Sleuth System, as set forth in SWBT practices. The Parties
                 acknowledge that those practices may be changed by SWBT from
                 time to time.


<PAGE>   125


                                                                   APPENDIX LIDB
                                                                         Page 12


         (K)     Administration of the SCP on which LIDB resides, as well as any
                 system or query processing logic that applies to all data
                 resident on SWBT's LIDB is, and remains, the responsibility of
                 SWBT. LSP acknowledges that SWBT, in its role as system
                 administrator, may need to access any record in LIDB, including
                 any such records of LSP. SWBT shall limit such access to those
                 actions necessary to ensure the successful operation and
                 administration of SWBT's SCP and LIDB.

         (L)     LSP acknowledges that SWBT shall, in its sole discretion, allow
                 or negotiate any access to SWBT's LIDB. LSP does not gain any
                 ability, by virtue of this Appendix, to determine which
                 telecommunications companies are allowed to access information
                 in SWBT's LIDB. LSP acknowledges that when SWBT allows a query
                 originator to access SWBT data in SWBT's LIDB, such query
                 originators shall also have access to LSP's data that is also
                 stored in SWBT's LIDB.

         (M)     LSP acknowledges that SWBT does not have data screening
                 capability in LIDB. Data Screening is the ability of a LIDB
                 owner to deny complete or partial access to LIDB data or
                 processes.

4.       Billing

         Compensation to SWBT for data storage and administration service and
         Sleuth services shall be based upon the rates set forth in Exhibit II
         (Basis of Compensation), attached hereto and made a part hereof. These
         rates will apply for one (1) year from the service effective date for
         each exchange. After one (1) year, SWBT may change the rates upon
         seventy-five (75) days' notice. SWBT may first give such notice
         seventy-five days before the end of the first year.

         4.1      SWBT Responsibilities

                  (A)      SWBT shall determine, for billing purposes, the
                           number of access lines that are administered for each
                           NPA-NXX or NPA-RAO for which SWBT performs the
                           database administration function on behalf of LSP.
                           SWBT shall quantify access lines monthly.

                  (B)      SWBT shall provide, upon written request, such data
                           as is reasonably necessary to verify billing charges
                           for data base administration update functions. SWBT
                           shall provide this information in standard SWBT LVAS
                           report formats.

                  (C)      SWBT shall provide such data, as is reasonably
                           necessary, to enable the independent Billing
                           Information Systems (IBIS) billing statements to be


<PAGE>   126


                                                                   APPENDIX LIDB
                                                                         Page 13

                           substantiated for query volumes of LSP line/billing
                           records that reside in SWBT's LIDB. SWBT shall
                           provide this data to LSP in standard Exchange Message
                           Record (EMR) format.

         4.2      LSP Responsibilities

                  (A)      LSP shall pay SWBT the amounts billed for the 
                           services rendered.

                  (B)      LSP shall bill the appropriate charges to end users,
                           on behalf of third parties who query LIDB and receive
                           a response verifying the end user's willingness to
                           accept the charges for the underlying call.

                  (C)      LSP shall provide to third parties, that query LIDB
                           and receive a response verifying an end user's
                           willingness to accept charges of services supported
                           by LIDB, all necessary billing information needed by
                           the third party to bill for the services provided.

         4.3      Compensation for Data Access

                  (A)      Subject to the limitations in (B) below, SWBT shall
                           compensate LSP for queries against the data LSP
                           stores in SWBT's LIDB. Queries by SWBT and LSP
                           against the data LSP stores in SWBT's LIDB shall be
                           included in the count of queries for which LSP will
                           be compensated. SWBT shall compensate LSP by paying a
                           percentage of the amounts SWBT billed, or would have
                           billed, for each query. LSP acknowledges that the
                           amount SWBT bills for LIDB queries against LSP's data
                           may differ by query type, by query originator, and/or
                           may change over time. The percentage SWBT will use to
                           calculate such credits is set forth in Exhibit II
                           (Basis of Compensation).

                  (B)      LSP acknowledges that SWBT's ability to provide such 
                           credit is based upon SWBT's ability to identify
                           account ownership in LIDB. LSP acknowledges that LIDB
                           currently identifies account ownership only at the
                           level of the group record (i.e., NPA-NXX or NPA-RAO).
                           LSP further agrees that SWBT will not provide such
                           credit for LSP accounts that reside in group records
                           that also contain SWBT or other data owner accounts.
                           SWBT agrees to work with its LIDB and switch vendors
                           to attempt to develop the capabilities for SWBT to
                           identify, and record for billing, the service
                           provider of individual line/billing records. SWBT
                           shall provide LSP compensation if SWBT implements
                           such capabilities in its network.

5.       Liability


<PAGE>   127


                                                                   APPENDIX LIDB
                                                                         Page 14


                  (A)      SWBT shall not be liable for any losses or damages
                           arising out of errors, interruptions, defects,
                           failures, or malfunction of LVAS, including any and
                           all associated equipment and data processing systems,
                           except such losses or damages caused by the sole
                           negligence of SWBT. Any losses or damages for which
                           SWBT is held liable under this Appendix shall in no
                           event exceed the amount of charges made for LVAS
                           during the period beginning at the time SWBT receives
                           notice of the error, interruption, defect, failure or
                           malfunction to the time service is restored.

                  (B)      SWBT shall not be liable for any losses or damages 
                           arising out of SWBT's administration of Sleuth.

                  (C)      SWBT SHALL NOT BE LIABLE IN ANY EVENT FOR ANY
                           SPECIAL, INDIRECT, INCIDENTAL, CONSEQUENTIAL, OR
                           EXEMPLARY DAMAGES RESULTING FROM, OR ARISING OUT OF,
                           OR IN CONNECTION WITH, THIS AGREEMENT.

                  (D)      LSP agrees to release, indemnify, defend, and hold
                           harmless SWBT from any and all claims, demands, or
                           suits brought by a third party against SWBT, directly
                           or indirectly, arising out of SWBT's provision of
                           service under this Appendix. This provision shall not
                           apply to any losses, damages or other liability for
                           which SWBT is found liable as a result of its sole
                           negligence.


6.       Disclaimer of Warranties

         SWBT MAKES NO REPRESENTATIONS OR WARRANTIES, EXPRESS OR IMPLIED,
         INCLUDING BUT NOT LIMITED TO ANY WARRANTY AS TO MERCHANTABILITY OR
         FITNESS FOR INTENDED OR PARTICULAR PURPOSE WITH RESPECT TO LVAS
         SERVICE, LIDB OR THE SLEUTH SYSTEM. ADDITIONALLY, SOUTHWESTERN BELL
         ASSUMES NO RESPONSIBLEILITY WITH REGARD TO THE CORRECTNESS OF THE DATA
         SUPPLIED BY LSP WHEN THIS DATA IS ACCESSED AND USED BY A THIRD PARTY.



<PAGE>   128



                                                                   APPENDIX LIDB
                                                                         Page 15

                                  APPENDIX LIDB

                                    EXHIBIT I

                          EXCHANGES TO BE ADMINISTERED

SWBT shall provide service management system and other interface service
capabilities to LSP as set forth in this Appendix and attached Exhibit or
Exhibits for the following LSP exchanges:

            EXCHANGE NAME                   NPA NXX                 NPA-RAO

      ----------------------    -------------------------   -------------------
      ----------------------    -------------------------   -------------------
      ----------------------    -------------------------   -------------------
      ----------------------    -------------------------   -------------------
      ----------------------    -------------------------   -------------------
      ----------------------    -------------------------   -------------------
      ----------------------    -------------------------   -------------------
      ----------------------    -------------------------   -------------------
      ----------------------    -------------------------   -------------------
      ----------------------    -------------------------   -------------------

(Attach additional copies as needed)




<PAGE>   129



                                  APPENDIX LIDB

                                   EXHIBIT II

                              BASIS OF COMPENSATION

1.       COMPENSATION :

All rates and charges contained in this section are applicable in all regulatory
jurisdictions.


2.       RATES AND CHARGES

      Manual Interface                                   Rate Per Initial Load
               (a)      Initial Load                     ---------------------
                        (1)     per initial load                  $372.00
                        (2)     per 100 line records 
                                loaded                            $ 55.00
                                                     
                                                              Rate Per Month
               (b)      Ongoing Updates                       --------------
                        (1)     per month                         $ 51.00
                        (2)     per 100 line records 
                                 stored in LIDB                   $  3.75



<PAGE>   130


                                  APPENDIX LIDB

                                   EXHIBIT III

               CALLING CARD AND BILLED NUMBER SCREENING VALIDATION

         (A)      SWBT shall provide the functionality needed to perform the
                  following query/response functions, on a call-by-call basis,
                  for the line/billing records residing in SWBT's LIDB to:

                    1.   Validate a 14-digit billing number where the first 10
                         digits are a telephone number or a special billing
                         number assigned and the last four digits (PIN) are a
                         security code assignment.

                    2.   Determine whether the billed line automatically
                         rejects, accepts, or requires verification of certain
                         calls billed as collect or third number.

                    3.   Determine whether the billed line is a public telephone
                         number using the Class of Service information in the
                         LIDB.

          B.      LSP shall bill the appropriate charges to end users, on behalf
                  of third parties who query LIDB and receive a response
                  validating the end user's willingness to accept the charges
                  for the underlying call.

Approved and executed the _________________________ day of _________, 19___.


DIGITAL TELEPORT, INC. (MISSOURI)   SOUTHWESTERN BELL TELEPHONE COMPANY

By________________________________  By_____________________________

Title_____________________________  Title__________________________  

Date______________________________  Date___________________________ 



<PAGE>   131


                                  APPENDIX LIDB

                                   EXHIBIT IV

                                     SLEUTH

         (A)      SWBT shall provide LSP with an alert notification, by fax, or
                  another mutually agreed upon format, when SWBT's Sleuth system
                  indicates the probability of a fraud incidence. SWBT will use
                  the same criteria to determine fraud alerts for LSP as SWBT
                  uses for its own accounts.

         (B)      Sleuth alert messages have four levels of priority. These
                  levels are low, medium, high and urgent. Sleuth delivers alert
                  messages to a queue in the Sleuth DBAC in priority order.
                  Urgent alerts are prioritized first, followed by high, medium
                  and low alerts (in that order).

         (C)      SWBT's Sleuth investigators can access alerts only in the
                  order the alerts appear in the queue. Low alerts almost never
                  see investigator treatment. However, when Sleuth encounters a
                  number of low priority alerts on the same account, Sleuth may
                  upgrade the alert's status to a higher priority status.

         (D)      When a Sleuth investigator determines that an urgent, high, or
                  medium priority alert is for an LSP account, the Sleuth
                  investigator will print the alert for the queue and fax the
                  alert to the LSP. Sleuth alerts only identify potential
                  occurrences of fraud. The LSP receiving Sleuth alerts will
                  need to perform its own investigations to determine whether a
                  fraud situation actually exists. The LSP will also need to
                  determine what, it any action should it take as a result of a
                  Sleuth alert.

         (E)      SWBT's hours of operation for Sleuth are seven days a week,
                  twenty-four hours per day (7X24). LSP shall provide SWBT with
                  a contact name and fax number for SWBT to fax alerts from
                  SWBT's Sleuth DBAC.

         (F)      SWBT shall provide LSP with a Sleuth contact name and number,
                  including fax number, for LSP to contact the Sleuth DBAC.

         (G)      For each alert notification SWBT provides to LSP, LSP may
                  request a corresponding 30-day historical report of
                  ABS-related query processing. LSP may request up to three
                  reports per alert. The charge for each historical report is
                  set forth in Exhibit II (Basis of Compensation).




<PAGE>   132




Approved and executed the _________________________ day of _________, 19___.


DIGITAL TELEPORT, INC. (MISSOURI)   SOUTHWESTERN BELL TELEPHONE COMPANY

By________________________________  By_____________________________

Title_____________________________  Title__________________________

Date______________________________  Date___________________________


<PAGE>   133



                                  APPENDIX LIDB

                                    EXHIBIT V

                           CNAM SERVICE QUERY SERVICE

Upon receipt of the line/billing information from LSP, in a format acceptable to
SWBT, SWBT will provide the functionality needed to perform the following
query/response functions, on a call-by-call basis, for the line/billing records
residing in SWBT's LIDB to identify the name associated with the line record.

Calling Name records are limited to fifteen characters. LSP is responsible for
providing all name truncations and/or abbreviations needed to limit a calling
name to 15 characters. LSP is also responsible for ensuring that its calling
name data does not contain obscenities in English or other languages. Upon
receipt of Calling Name data, in a format acceptable to SWBT, SWBT will provide
the query/response functions, on a call-by-call basis, for the line/billing
records residing in SWBT's LIDB to identify the name associated with the line
record.

CNAM Service Query is SWBT's service that allows customers to query SWBT's LIDB
for calling name information. Calling Name information means a
telecommunications company's records of all its subscribers' names associated
with one or more ten-digit telephone numbers assigned to the end user.

Approved and executed the _________________________ day of _________, 19___.


DIGITAL TELEPORT, INC. (MISSOURI)   SOUTHWESTERN BELL TELEPHONE COMPANY

By_______________________________   By_____________________________

Title____________________________   Title__________________________  

Date_____________________________   Date___________________________ 



<PAGE>   134


                                  APPENDIX LIDB

                                   EXHIBIT VI

                    SINGLE NUMBER SERVICE (SNS) QUERY SERVICE

Upon receipt of the line/billing information from LSP, in a format acceptable to
SWBT, SWBT shall provide the functionality needed to perform the query/response
functions, on a call-by-call basis, for the line/billing records residing in
SWBT's LIDB to identify the ZIP code associated with the line record.


Approved and executed the _________________________ day of _________, 19___.


DIGITAL TELEPORT, INC. (MISSOURI)   SOUTHWESTERN BELL TELEPHONE COMPANY

By________________________________  By_____________________________

Title_____________________________  Title__________________________

Date______________________________  Date___________________________



<PAGE>   135



                                  APPENDIX LIDB

                                   EXHIBIT VII

                 ORIGINATING LINE NUMBER SCREENING (OLNS) QUERY

Upon receipt of the line/billing information for LSP, in a format acceptable to
SWBT, SWBT shall provide the functionality needed to perform the query/response
functions, on a call-by-call basis, for the line/billing records residing in
SWBT's LIDB to identify the originating line screening requirements of the line
record.

LSP shall ensure that its OLNS data complies with the definitions and record
formats set forth in GR-1149-CORE and GR-446-CORE.


Approved and executed the _________________________ day of _________, 19___.


DIGITAL TELEPORT, INC. (MISSOURI)   SOUTHWESTERN BELL TELEPHONE COMPANY

By_______________________________   By_____________________________

Title____________________________   Title__________________________  

Date_____________________________   Date___________________________ 


<PAGE>   136


                                                                 APPENDIX LIDB-V
                                                                    PAGE 2 OF 14


                                 APPENDIX LIDB-V
                        APPENDIX LIDB VALIDATION SERVICE

         WHEREAS, the Parties are interested in purchasing each other's
LIDB Validation Service (or equivalent service);

         In consideration of the mutual promises contained herein, SWBT and LSP
agree as follows.

I.       DEFINITIONS

         A.       A-links means a diverse pair of facilities connecting local
                  end office switching centers with Signaling Transfer Points.

         B.       Alternate Billing Service (ABS) means a service that allows
                  end users to bill calls to accounts that may not be associated
                  with the originating line. There are three types of ABS calls:
                  calling card, collect, and third number billed calls.

         C.       Billed Number Screening (BNS) means a validation of toll
                  billing exception (TBE) data and performance of public
                  telephone checks i.e., determining if a billed line is a
                  public (including those classified as semi-public) telephone
                  number.

         D.       Calling Card Service (CCS) means a service that enables a
                  calling customer to bill a telephone call to a calling card
                  number with or without the help of an operator.

         E.       Common Channel Signaling (CCS) Network means an out-of-band,
                  packet-switched, signaling network used to transport
                  supervision signals, control signals, and data messages.
                  Validation Queries and Response messages are transported
                  across the CCS network.

         F.       Data Base means an integrated collection of related data. In
                  the case of the LIDB, the data base is the line number and
                  related line information.

         G.       Data Owner means telecommunications companies that administer
                  their own validation data in a party's LIDB or LIDB-like
                  database.

         H.       Line Information Data Base (LIDB) means an ANSI SS7
                  call-related database system. LIDB functions as a centralized
                  repository for data storage and retrieval. SWBT's LIDB
                  supports validation of ABS calls as well as certain other
                  services.

         I.       Line Record means information in LIDB that is specific to a 
                  single telephone number or special billing number.

         J.       Nonrecurring charges are one-time charges that apply for a 
                  specific work activity


<PAGE>   137


                                                                 APPENDIX LIDB-V
                                                                    PAGE 3 OF 14

                  (i.e., installation or change to an existing service).
                  Nonrecurring charges are applicable for the establishment of
                  LIDB Validation Service, service rearrangements, and service
                  order activity.

         K.       Originating Point Code (OPC) means a code assigned to 
                  identify LSP's operator service system location(s).

         L.       Personal Identification Number (PIN) means a confidential
                  four-digit code number provided to a calling card customer to
                  prevent unauthorized use of his/her calling card number. The
                  PIN is stored in LIDB for those line numbers that have an
                  associated calling card.

         M.       Query means a message in American National Standards
                  Institute's (ANSI) standard SS7 signaling protocol which
                  represents a request to a LIDB or LIDB-like database for
                  Validation information.

         N.       Query Rate applies to each Validation Query that is received
                  at SWBT's LIDB for the validation of calling card and toll
                  billing exception data and performance of public telephone
                  checks; i.e., determining if a billed line is a public
                  (including those classified as semi public) telephone number.

         O.       Query Transport Rate applies to each Validation Query
                  transported from SWBT's STP to the SCP where LIDB resides and
                  back. SWBT and LSP shall list their STP locations in the
                  National Exchange Carrier Association, Inc. Tariff FCC No.
                  4.

         P.       Response means an SS7 message which, when appropriately 
                  interpreted, represents an answer to a Query.

         Q.       Service Order Charge is a nonrecurring charge that applies,
                  per service order form, that specifies the LSP's originating
                  point codes (OPCs) of the LSP's designated operator service
                  systems sending the Validation Query or Queries.

         R.       Service Control Point (SCP) is a CCS network node where 
                  Validation information resides.

         S.       Service Point (SP) means a CCS network interface element
                  capable of initiating and/or terminating SS7 messages from an
                  end office.

         T.       Service Rearrangements are changes to existing services which
                  do not result in changes to previously established OPCs.

         U.       Service Switching Point (SSP) means the software capability
                  within a switching point that provides the SP with SS7 message
                  preparation/interpretation capability plus SS7
                  transmission/reception access ability.



<PAGE>   138


                                                                 APPENDIX LIDB-V
                                                                    PAGE 4 OF 14

         V.       Signaling System 7 (SS7) means the signaling protocol used by 
                  the CCS network.

         W.       Signaling Transfer Point (STP) is the point where a Party
                  interconnects with a CCS/SS7 network. In order to connect to
                  SWBT's SS7 network, LSP or a third party initiating LSP's
                  Validation Queries must connect with an SWBT STP in order to
                  connect to SWBT's SCP.

         X.       Special Billing Number means line records in LIDB that are
                  based on an NPA-RAO numbering format. NPA-RAO numbering
                  formats are similar to NPA-NXX formats except that the fourth
                  digit of an NPA-RAO line record is either a zero (0) or a one
                  (1).

         Y.       Toll Billing Exception (TBE) Service means a service that
                  allows end users to restrict third number billing or collect
                  calls to their lines.

         Z.       Validation information means Data Owners' records of all their
                  Calling Card Service and Toll Billing Exception Service.

II.      DESCRIPTION OF SERVICE

         A.       SWBT shall provide LSP access to Validation information
                  whenever LSP initiates a query from an SSP for Validation
                  information available in SWBT's LIDB.

         B.       All LSP Queries to SWBT's LIDB shall use subsystem number 253
                  in the calling party address field and a translations type of
                  253 and a subsystem number in the calling party address field
                  that is mutually agreed upon by the Parties. LSP acknowledges
                  that such subsystem number and translation type values are
                  necessary for SWBT to properly process Validation Queries to
                  its LIDB.

         C.       LSP  warrants SWBT that LSP shall send Queries conforming to 
                  the ANSI approved standards for SS7 protocol and pursuant to
                  the specification standards documents identified in Exhibit A
                  attached hereto and incorporated by reference. Both Parties
                  acknowledge that transmission in said protocol is necessary
                  for each party to provision Validation Service (or the
                  equivalent thereof). Both Parties warrant that they shall send
                  SS7 Messages that comply with ANSI approved standards for SS7
                  protocol and pursuant to the specification standards documents
                  identified in Exhibit A. Each Party reserves the right to
                  modify its network pursuant to other specifications standards,
                  which may include Bellcore Specifications defining specific
                  service applications, message types and formats, that may
                  become necessary to meet the prevailing demands within the
                  U.S. telecommunications industry. All such changes shall be
                  announced a minimum of one hundred eighty (180) days in
                  advance of implementation through industry standard
                  procedures. Each Party will work cooperatively to coordinate
                  any necessary changes.


<PAGE>   139


                                                                 APPENDIX LIDB-V
                                                                    PAGE 5 OF 14


         D.       LSP acknowledges that CCS/SS7 network overload due to
                  extraordinary volumes of Queries and/or other SS7 network
                  messages can and will have a detrimental effect on the
                  performance of SWBT's CCS/SS7 network. LSP further agrees that
                  SWBT, in its sole discretion, shall employ certain automatic
                  and/or manual overload controls within SWBT's CCS/SS7 network
                  to guard against these detrimental effects. SWBT shall report
                  to LSP any instances where overload controls are invoked due
                  to LSP's CCS/SS7 network and LSP agrees in such cases to take
                  immediate corrective actions as are necessary to cure the
                  conditions causing the overload situation.

         E.       Prior to SWBT initiating service under this Appendix, LSP
                  shall provide an initial forecast of busy hour Query volumes.
                  If, prior to the establishment of a mutually agreeable service
                  effective date, in writing, SWBT, at its sole discretion,
                  determines that it lacks adequate processing capability to
                  provide Validation Service to LSP, SWBT shall notify LSP of
                  SWBT's intent not to provide the services under this Appendix
                  and this Appendix will be void and have no further effect.

         F.       LSP shall update its busy hour forecast for each upcoming
                  calendar year (January - December) by October 1 of the
                  preceding year. LSP shall provide such updates each year for
                  the first three (3) years of this Appendix.

         G.       SWBT will perform testing of the LIDB Validation Service in
                  conjunction with CCS/SS7 Interconnection Service as outlined
                  in Bellcore Technical References TR-NWT-000954, TR-TSV-000905,
                  and TP 76638.

         H.       SWBT supports the performance standards as defined in Section
                  7 of TR- TSV-000905. The overall end-to-end CCS/SS7 network
                  objective is less than ten minutes unavailability per year
                  from any Signal Point (SP) to any other SP. The performance
                  objective for any single SP, including a Service Control Point
                  (SCP), is less than three minutes unavailability per year. The
                  combined link set from the SCP to the Signal Transfer Point
                  (STP) has a performance objective of less than two minutes
                  unavailability per year.

         I.       SWBT's LIDB Validation Service system downtime will be less
                  than twelve hours per year. The response time for a Query,
                  from switch transmission to reception, should not exceed one
                  second for ninety-nine (99) percent of all Queries.

         J.       SWBT shall administer its LIDB to provide acceptable service
                  levels to all customers of SWBT's LIDB Validation Service.
                  During periods of LIDB system congestion, SWBT will utilize an
                  automatic code gapping procedure to control such congestion.
                  The automatic code gapping procedure will tell LSP's switch
                  the gap (how long LSP's switch should wait before sending
                  another query) and


<PAGE>   140


                                                                 APPENDIX LIDB-V
                                                                    PAGE 6 OF 14

                  the duration (how long the switch should continue to perform
                  gapping). For example, during an overload condition, the
                  automatic code gapping procedure will tell SWBT's LIDB when to
                  begin to drop one out of three queries received. This code
                  gapping procedure will be applied uniformly to all users of
                  SWBT's LIDB Validation Service. SWBT maintains the right to
                  invoke manual intervention of the automatic code gapping
                  procedure to preserve the integrity of its network.

         K.       LSP agrees that network overload due to extraordinary volumes
                  of Queries and/or other SS7 network messages can and will have
                  a detrimental effect on the performance of SWBT's network and
                  its LIDB Validation Service. LSP further agrees to take
                  immediate, corrective actions as are necessary to cure the
                  conditions causing the overload situation.

         L.       All access by LSP to SWBT's LIDB shall occur through SWBT's 
                  regional STP as designated by SWBT.

         M.       SWBT's LIDB shall contain a record for every SWBT working line
                  number and Special Billing Number served by SWBT. Other
                  telecommunications companies, including LSP, may also store
                  their data in SWBT's LIDB. SWBT shall request such
                  telecommunications companies to also provide this data as
                  well.

         N.       SWBT shall update the LIDB information; e.g., add, delete, and
                  modify customer accounts as customers move, become delinquent
                  on their account, or order new service, on a daily basis. SWBT
                  shall request other Data Owners to provide such updates in
                  like time.

         O.       SWBT has procedures in place to deactivate billing validation
                  data in the event that such data is being used fraudulently or
                  in the event end users exceed SWBT-defined limits on toll
                  charges. SWBT shall update SWBT- issued calling cards that
                  SWBT suspects of being fraudulently used or exceeding
                  SWBT-defined toll limits seven (7) days a week, 24 hours a
                  day.

         P.       SWBT's LIDB shall receive and respond to all Calling Card
                  Service and Billed Number Screening queries, including SWBT's
                  and LSP's queries, as defined in Bellcore publications
                  TR-NWT-000246, FR-NWT-000271, TR-TSV-000905, TR-NWT-000954 and
                  SWBT's publication TP 6638. These procedures shall be applied
                  uniformly to all users of SWBT's LIDB Validation Service.

         Q.       SWBT's LIDB Validation Service shall provide the following 
                  functions on a per query basis:

                  -        validation of a telecommunications calling card 
                           account number stored in LIDB;


<PAGE>   141


                                                                 APPENDIX LIDB-V
                                                                    PAGE 7 OF 14


                  -        determination  of whether the billed line has 
                           decided in advance to reject certain calls billed as 
                           collect or to a third number; and

                  -        determination of billed line as a public (including
                           those classified as semi public) or nonworking
                           telephone number.

         R.       SWBT provides LIDB Validation Service as set forth in this 
                  Appendix only as such service is used for LSP's activities as
                  a local service provider in SWBT's traditional serving areas
                  in the states of Arkansas, Kansas, Missouri, Oklahoma, and
                  Texas. SWBT provides a LIDB Validation Service for
                  interexchange carriers, operator service providers, and other
                  telecommunications companies under effective tariffs. LSP
                  agrees that any other use of SWBT's LIDB for the provision of
                  LIDB Validation Service by LSP, including, but not limited to,
                  when LSP acts as an LSP outside of SWBT's traditional serving
                  areas in the states of Arkansas, Kansas, Missouri, Oklahoma,
                  and Texas, and/or acts as an operator service provider to
                  other LSPs, local exchange companies, or any other
                  telecommunications company, and/or acts as an interexchange
                  carrier, will be pursuant to the terms, conditions, rates, and
                  charges of SWBT's effective tariffs, as revised, for LIDB
                  Validation Service.

III.     PRICE AND PAYMENT

         A.       LSP shall pay SWBT a Validation Query rate and a Query
                  Transport Rate for each Query initiated into SWBT's LIDB.
                  These rates are set forth in Exhibit I (Basis of
                  Compensation), which is attached hereto and incorporated by
                  reference.

         B.       LSP shall pay a Nonrecurring Charge for each request for
                  establishment or change of existing LIDB Validation Service.
                  The LIDB Validation Service Establishment Charge applies per
                  originating point code per request and is set forth in Exhibit
                  I (Basis of Compensation).

         C.       LSP shall pay a Service Order Charge for each request for
                  service order activity. The Service Order Charge is set forth
                  in Exhibit I (Basis of Compensation).

         D.       Payment to SWBT for LIDB Validation Service shall be based
                  upon the rates set forth in Exhibit I (Basis of Compensation),
                  attached hereto and made a part thereof. These rates and
                  charges will apply for one (1) year from the service effective
                  date for each exchange. After one (1) year, SWBT may change
                  the rates upon sixty (60) days' notice. SWBT may first give
                  such notice sixty (60) days before the end of the first year.

         E.       SWBT shall record usage information for LSP's Validation
                  Queries terminating to SWBT's LIDB. SWBT shall use its SCPs as
                  the source of usage data. SWBT shall aggregate usage by the
                  point code of the Query-originating SSP.



<PAGE>   142


                                                                 APPENDIX LIDB-V
                                                                    PAGE 8 OF 14

         F.       Based upon the data identified in SubSection 3.E of this
                  Appendix, SWBT shall bill LSP for its Validation Queries on a
                  monthly basis. The bill will be issued by the fifteenth day of
                  each month, and LSP shall pay the bill within thirty (30) days
                  of the bill issue date. LSP shall pay late payment charges as
                  applicable and as described in SWBT's Tariff FCC No. 73.

         G.       SWBT shall provide sufficient information with the bill to
                  enable LSP to determine how the billed amount was calculated.

         H.       Depending on LSP's choice of method for transporting its
                  Queries and Responses, LSP may be required to purchase certain
                  other services, especially services that may be provided
                  pursuant to effective tariffs. In this event the prices,
                  terms, conditions, and billing for such services will be
                  specified in the applicable tariff(s) and this Appendix shall
                  not be construed to circumvent the prices, terms, conditions,
                  or billing as specified in the applicable tariff(s).

         I.       If there is a dispute associated with a monthly bill, the
                  disputing Party shall notify the other in writing within
                  ninety (90) calendar days of the date of said monthly bill or
                  the dispute shall be waived. Each Party agrees that any amount
                  of any monthly bill that that Party disputes will be paid by
                  that Party according to the terms of Subsection III.F. above.
                  Any adjustments relating to a disputed amount shall be
                  reflected on the next monthly bill issued after resolution.
                  Any credit issued upon resolution of any dispute shall bear
                  interest at the rate specified in Subsection III.F. above,
                  payable on and as of the date the credit is issued. Parties
                  shall work cooperatively and use their best efforts to resolve
                  any disputes as quickly as possible.

         J.       SWBT shall treat changes in previously established OPCs as a
                  discontinuance of the existing LIDB Validation Service and
                  establishment of a new LIDB Validation Service and all
                  applicable Nonrecurring Charges shall be paid by LSP.

         K.       If LSP acts as a  telecommunications company other than a 
                  local service provider, or if LSP acts as a local service
                  provider in areas outside of SWBT's traditional service areas
                  in the states of Arkansas, Kansas, Missouri, Oklahoma, and
                  Texas, LSP shall designate those point codes from which it
                  originates LIDB Validation Service Queries as an LSP acting as
                  a local service provider within SWBT's traditional service
                  areas in the states of Arkansas, Kansas, Missouri, Oklahoma,
                  and Texas from those point codes which originate LIDB
                  Validation Service Queries for all other aspects of its
                  business. If LSP uses the same OPC to originate Queries for
                  its operations as an LSP within SWBT's traditional service
                  areas in the states of Arkansas, Kansas, Missouri, Oklahoma,
                  and Texas as it does for any other aspect of its business,
                  then LSP shall provide SWBT with a percentage of use factor
                  that SWBT can use to apportion LSP's traffic between SWBT's
                  terms, conditions, rates and charges under this Appendix and
                  the terms, conditions, rates and charges under SWBT's
                  appropriate and effective tariff. LSP


<PAGE>   143


                                                                 APPENDIX LIDB-V
                                                                    PAGE 9 OF 14

                  shall provide this factor in a whole number between one (1)
                  and one hundred (100) to indicate the percentage of LIDB
                  Validation Services LSP originates as an LSP acting as a local
                  service provider within SWBT's traditional service area in the
                  states of Arkansas, Kansas, Missouri, Oklahoma, and Texas. A
                  percentage of use factor of 1 (one) indicates that one percent
                  of LSP's LIDB Validation Service Queries originate as an LSP
                  acting as a local service provider within SWBT's traditional
                  service areas in the states of Arkansas, Kansas, Missouri,
                  Oklahoma, and Texas. A percentage of use factor of one hundred
                  (100) indicates that one hundred percent of LSP's LIDB
                  Validation Service Queries is from LSP acting as a local
                  service provider within SWBT's traditional service area in the
                  states of Arkansas, Kansas, Missouri, Oklahoma, and Texas.

         L.       Such percentage of use factors will be provided by LSP on the
                  LIDB Access Service Order Form used to establish the service.
                  All updates to this factor will provided via a letter. If LSP
                  does not furnish a percentage of usage factor, LSP agrees that
                  SWBT will apply a percentage of usage factor of one percent
                  (1%).

         M.       LSP shall update its percentage of use factors on a quarterly 
                  basis. Effective on the first of January, April, July and
                  October of each year, LSP shall forward to SWBT, to be
                  received no later than fifteen (15) business days after the
                  first of each such month, a revised report showing the
                  percentage of use factors for the past three months ending the
                  last day of December, March, June, and September,
                  respectively, for each OPC from which LSP originates LIDB
                  Validation Service Queries. Both Parties agree that the
                  revised report will serve as the basis for the next three
                  months billing. Both Parties agree that no prorating or
                  backbilling will be done based on the report. SWBT shall use
                  the revised report to apportion usage rates, monthly rates,
                  and nonrecurring charges until a revised report is received
                  from LSP as set forth and agreed to herein.

         N.       SWBT may, upon written request by Certified U.S. mail (return 
                  receipt requested), require LSP to provide call detail records
                  which will be audited to substantiate the projected percentage
                  of use factor provided by LSP. SWBT may request this detailed
                  information annually. If the audit results represent what SWBT
                  considers to be a substantial deviation from LSP's previously
                  reported percentage of use for the period upon which the audit
                  was based, and that deviation is not due to seasonal changes
                  or other identifiable reasons, LSP agrees to allow SWBT to
                  request such call detail records more than once annually. Both
                  parties agree that SWBT may make the call detail records
                  available to an independent auditor or to SWBT audit employees
                  within thirty (30) days of the request at an agreed upon
                  location during normal business hours.

         O.       If LSP fails to comply with SWBT's request for auditable call
                  detail records, SWBT may refuse additional applications for
                  service and/or refuse to complete any pending orders for
                  service for a period of thirty (30) days. If at the conclusion
                  of thirty (30) days, LSP still does not comply with this
                  request, SWBT


<PAGE>   144


                                                                 APPENDIX LIDB-V
                                                                   PAGE 10 OF 14

                  may apply an assumed percentage of use factor of one percent
                  (1%).

IV.      OWNERSHIP OF VALIDATION INFORMATION

         A.       Telecommunications companies depositing information in SWBT's
                  LIDB may retain full and complete ownership and control over
                  such information. LSP obtains no ownership interest by virtue
                  of this Appendix.

         B.       Unless expressly authorized in writing by parties, LIDB
                  Validation Service is not to be used for purposes other than
                  those described in this Appendix. LSP may use LIDB Validation
                  Service for those functions only on a call-by-call basis. Data
                  accessed on LIDB may not be stored by LSP elsewhere for future
                  use.

         C.       Proprietary information residing in SWBT's LIDB is protected
                  from unauthorized access and LSP may not store such
                  information in any table or database for any reason. All
                  information related to alternate billing service is
                  proprietary. Examples of proprietary information are as
                  follows:

                  -        Billed (Line/Regional Accounting Office (RAO)) Number
                  -        PIN Number(s)
                  -        Billed Number Screening (BNS) indicators
                  -        Class of Service (also referred to as Service or 
                           Equipment)
                  -        Reports on LIDB usage
                  -        Information related to billing for LIDB usage
                  -        LIDB usage statistics.

         D.       LSP shall not copy, store, maintain, or create any table or
                  database of any kind after initiating, and based upon a
                  Response to, a Validation Query to SWBT's LIDB.

         E.       If LSP acts on behalf of other carriers, LSP shall prohibit
                  its Query- originating carrier customers from copying,
                  storing, maintaining, or creating any table or database of any
                  kind from any Response provided by SWBT after a Validation
                  Query to SWBT's LIDB.

         F.       SWBT will share end user information, pertinent to fraud
                  investigation, with LSP when validation queries for the
                  specific end user reaches SWBT's established fraud threshold
                  level. This fraud threshold level will be applied uniformly to
                  all end user information in SWBT's LIDB.

V.       TERM AND TERMINATION

         A.       This Appendix shall become effective pursuant to Section XXVII
                  (Effective Date) of the Statement and shall continue for one
                  (1) year from the effective date of implementation of LIDB
                  Validation Service. Thereafter, this Appendix shall


<PAGE>   145


                                                                 APPENDIX LIDB-V
                                                                   PAGE 11 OF 14

                  remain in effect unless terminated by either party upon
                  written notice given sixty (60) days in advance of the
                  termination date.

         B.       If a Party materially fails to perform its obligations under
                  this Appendix, the other Party, after notifying the
                  non-performing Party of the failure to perform and allowing
                  that Party thirty (30) days after receipt of the notice to
                  cure such failure, may cancel this Appendix immediately upon
                  written notice.

         C.       Notwithstanding anything to the contrary in this Appendix, if
                  legal or regulatory decisions or rules compel SWBT or LSP to
                  terminate the Appendix, SWBT and LSP shall have no liability
                  to the other in connection with such termination.

VI.      LIMITATION OF LIABILITY

         A.       A Party's sole and exclusive remedies against the other Party
                  for injury, loss or damage caused by or arising from anything
                  said, omitted or done in connection with this Appendix
                  regardless of the form of action, whither in contract or in
                  tort (including negligence or strict liability) shall be the
                  amount of actual direct damages and in no event shall exceed
                  the amount paid for LIDB Validation Service.

         B.       The remedies in Section VI.A. of this Appendix shall be
                  exclusive of all other remedies against a Party, its
                  affiliates, subsidiaries or parent corporation, (including
                  their directors, officers, employees or agents).

         C.       In no event shall a Party have any liability for system outage
                  or inaccessibility, or for losses arising from the
                  unauthorized use of the data by LIDB Validation Service Query
                  purchasers.

         D.       SWBT is furnishing access to its LIDB or LIDB-like database 
                  in order to facilitate LSP's provision of Alternate Billing
                  Service to its end users, but not to insure against the risk
                  of completion of an ABS-related call. While SWBT agrees to
                  make every reasonable attempt to provide accurate Validation
                  information, the Parties acknowledge that Validation
                  information is the product of routine business service order
                  activity and fraud investigations. LSP acknowledges that SWBT
                  can furnish Validation information only as accurate and
                  current as the information has been provided to SWBT for
                  inclusion in its LIDB. Therefore, SWBT, in addition to the
                  limitations of liability set forth, is not liable for
                  inaccuracies in the Validation information records provided to
                  LSP except such inaccuracies caused by SWBT's willful or
                  wanton misconduct or gross negligence.

         E.       IN NO EVENT SHALL SWBT, ITS  AFFILIATES, SUBSIDIARIES OR 
                  PARENT CORPORATION, (INCLUDING ITS DIRECTORS, OFFICERS,
                  EMPLOYEES OR AGENTS) HAVE ANY LIABILITY WHATSOEVER TO


<PAGE>   146


                                                                 APPENDIX LIDB-V
                                                                   PAGE 12 OF 14

                  OR THROUGH LSP FOR ANY INDIRECT, SPECIAL, OR CONSEQUENTIAL
                  DAMAGES, INCLUDING, BUT NOT LIMITED TO LOSS OF ANTICIPATED
                  PROFITS OR REVENUE OR OTHER ECONOMIC LOSS IN CONNECTION WITH
                  OR ARISING FROM ANYTHING SAID, OMITTED OR DONE HEREUNDER, EVEN
                  IF LSP HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.

VII.     COMMUNICATION AND NOTICES

         A.       Ordering and billing inquiries for the services described
                  herein from SWBT shall be directed to the Local Service
                  Provider Service Center (LSPSC). Ordering shall be done
                  through the LSPSC using the form attached hereto as Exhibit
                  III.

VIII.    CONFIDENTIALITY

         A.       Identification SWBT and LSP recognize and acknowledge that, in
                  connection with the services to be provided hereunder, either
                  may disclose to the other party proprietary or confidential
                  customer, technical or business information in written
                  graphic, oral or other tangible or intangible forms. In order
                  for such information to be considered "Proprietary
                  Information" under this Appendix, such information must be
                  marked "Confidential" or "Proprietary" or bear a marking of
                  similar import. Orally disclosed information shall be
                  considered Proprietary Information only if contemporaneously
                  identified as such and reduced to writing and delivered to the
                  other party with a statement or marking of confidentiality
                  within twenty (20) calendar days after oral disclosure.

         B.       Nondisclosure. Subject to Sections 8C through 8F, the Party
                  (the "Receiving Party") that receives Proprietary Information
                  from the other Party (the "Disclosing Party") agrees:

                  (1)      That all Proprietary Information shall be and shall 
                           remain the exclusive property of the Disclosing 
                           Party.

                  (2)      To limit access to such Proprietary Information to
                           authorized employees and other individuals who have a
                           need to know the Proprietary Information in order to
                           perform its obligations under this Appendix.

                  (3)      To keep such Proprietary Information confidential and
                           to use the same level of care to prevent disclosure
                           or unauthorized use of the received Proprietary
                           Information as it exercises in protecting its own
                           Proprietary Information of a similar nature.

                  (4)      For a period of three (3) years following any
                           disclosure, not to copy or publish or disclose such
                           Proprietary Information to others or authorize anyone
                           else to copy or publish or disclose such Proprietary
                           Information to


<PAGE>   147


                                                                 APPENDIX LIDB-V
                                                                   PAGE 13 OF 14

                           others without the prior written approval of the 
                           Disclosing Party.

                  (5)      To use such Proprietary Information only for purposes
                           of performing its obligations under this Appendix and
                           for other purposes only upon such terms as may be
                           agreed upon between the Parties in writing.

         C.       Required  Disclosures.  The Receiving Party agrees to give 
                  notice to the Disclosing Party of any demand to disclose or
                  provide Proprietary Information of the Disclosing Party to
                  another person, under lawful process, prior to disclosing or
                  furnishing such Proprietary Information. Further, the
                  Receiving Party agrees to reasonably cooperate if the
                  Disclosing Party deems it necessary to seek protective
                  arrangements. The Receiving Party may disclose or provide
                  Proprietary Information of the Disclosing Party to meet the
                  requirements of a court, regulatory body or government agency
                  having jurisdiction over the Party; provided, however, that
                  the Receiving Party shall notify the Disclosing Party so as to
                  give the Disclosing Party a reasonable opportunity to object
                  to such disclosure. The Disclosing Party may not unreasonably
                  withhold approval of protective arrangements provided by any
                  such court, regulatory body or government agency. Nothing
                  herein requires either Party to support the position of any
                  person or entity as to whether any particular Proprietary
                  Information is proprietary under applicable law or this
                  Section 8.

         D.       Exceptions. Notwithstanding anything to the contrary contained
                  in this Appendix, the Proprietary Information described herein
                  shall not be deemed confidential or proprietary and the
                  Receiving Party shall have no obligation to prevent disclosure
                  of such Proprietary Information if such Proprietary
                  Information:

                  (1)     is already known to the Receiving Party;

                  (2)     is or becomes publicly known, through publication,
                          inspection of the product, or otherwise, and through
                          no wrongful act of the Receiving Party;

                  (3)     is received from a third party without similar 
                          restriction and without breach of this Section 8;

                  (4)     is independently developed, produced or generated by 
                          the Receiving Party;

                  (5)     is furnished to a third party by the Disclosing 
                          Party without a similar restriction on the third      
                          party's rights; or
        
                  (6)     is approved for release by written authorization of 
                          the Disclosing Party, but only to the extent of such
                          authorization.


<PAGE>   148


                                                                 APPENDIX LIDB-V
                                                                   PAGE 14 OF 14

         E.       Permitted Uses. SWBT shall be permitted to use Proprietary  
                  Information obtained through recording the volume of LSP
                  Queries for the purposes of: (a) estimation of facilities
                  usage for jurisdictional separations; (b) engineering and
                  network planning of facilities; and (c) measurement for
                  billing purposes.

         F.       Legal Requirements. Notwithstanding anything to the contrary
                  contained in this Agreement, a Party's ability to disclose
                  Proprietary Information or use disclosed Proprietary
                  Information is subject all applicable statures, decisions, and
                  regulatory rules concerning the disclosure and use of such
                  Proprietary Information which, by their express terms, mandate
                  a different handling of such information.

 9.      Mutuality

         To the extent that LSP stores its own Validation Information in a
         database, LSP agrees that Validation Information shall be available to
         SWBT on terms and conditions comparable to those contained in this
         Appendix. Such terms and conditions shall include, but not be limited
         to, making such Validation Information available on a platform
         technically similar to that employed by SWBT, and at a rate comparable
         to that charged by SWBT.

10.      Attached and incorporated herein are:

         Exhibit I     -  Basis of Compensation
         Exhibit II    -  Specifications and Standards
         Exhibit III   -  LIDB Access Service Order Form


<PAGE>   149
                                                       APPENDIX LIDB-V-EXHIBIT I
                                                                     PAGE 1 OF 1

                                APPENDIX LIDB-V

                             BASIS OF COMPENSATION


1. COMPENSATION:

      All rates and charges contained in this section are applicable in all
      regulatory jurisdictions.


2. Rates and Charges

   A    LIDB Query                                        Rate Per Query
                                                          --------------

        1.  Per LIDB Query Transport                      $.0045
            
        2.  Per LIDB Validation Query                     $.026
            
            - Billed Number Screening
            - Calling Card Count

   B.   LIDB Nonrecurring Charge                          Nonrecurring Charge
                                                          -------------------

        1.  Per Originating Point Code (OPC)              $36.00
            
        2.  Per LIDB Validation Service Form              $256.70



<PAGE>   150



                                                      APPENDIX LIDB-V-EXHIBIT II
                                                                     PAGE 1 OF 1



                                APPENDIX LIDB-V

                          SPECIFICATIONS AND STANDARDS



Issuing Organization                       Document Number
- --------------------                       ---------------
                                         
Bellcore                                   TR-NWT-000246
                                         
                                         
Bellcore                                   TR-NWT-000271
                                         
                                         
Bellcore                                   TR-TSV-000905
                                         
                                         
Bellcore                                   TR-NWT-000954
                                         
SWBT                                       TP 76638




<PAGE>   151



                                                                    APPENDIX MAP


                             LITTLE ROCK, ARKANSAS


SWBT OPTIONAL CALLING AREAS
- -  BENTON
- -  BAUXITE



ILEC MANDATORY EXCHANGES
- -  JACKSONVILLE



<PAGE>   152


                                                                    APPENDIX OSS
                                                                          PAGE 2



                                  APPENDIX OSS

                 ACCESS TO OPERATIONS SUPPORT SYSTEMS FUNCTIONS

                                  APPENDIX OSS

                 ACCESS TO OPERATIONS SUPPORT SYSTEMS FUNCTIONS

1.   GENERAL CONDITIONS

     1.1 This Appendix sets forth the terms and conditions under which SWBT
provides nondiscriminatory access to SWBT's operations support systems (OSS)
"functions" to LSP for pre-ordering, ordering, provisioning, maintenance /
repair, and billing.  Such functions will be made available as described herein
for Resold Services, as provided in Appendix Resale, and for Unbundled Network
Elements (UNE), as provided in Appendix UNE.

     1.2 The functions, for Resale and UNE, will be accessible via electronic
interface, as described herein, where such functions are available. Manual
access will be available to all pre-ordering, ordering, provisioning, and
billing functions via the Local Service Provider Service Center (LSPSC). Repair
and maintenance functions are available via manual handling by the Local
Service Provider Center (LSPC).

     1.3 LSP agrees to utilize SWBT electronic interfaces, as SWBT defines
in its requirements, only for the functions described herein for the purposes
of establishing and maintaining Resale services or UNE.  LSP agrees that such
use will comply with the summary of SWBT's Operating Practice No. 113,
Protection of Electronic Information, titled Local Service Provider Security
Policies and Guidelines.

     1.4 LSP acknowledges and agrees that access to OSS functions will only
be utilized to view an end-user's Customer Proprietary Network Information
under the conditions set forth and agreed to in Exhibit A of this Appendix.

     1.5 By utilizing electronic interfaces to access OSS functions, LSP
acknowledges and agrees to perform accurate and correct billing functions that
occur during ordering per the terms of this Agreement. Further, LSP recognizes
that such billing functions for conversion orders require viewing CPNI as
described in 1.4 above.  All exception handling must be requested manually from
LSPSC.

     1.6 In areas where Resale and UNE service order transactions cannot be
provided via an electronic interface for the pre-order, ordering and
provisioning processes, SWBT and LSP will utilize manual processes until such
time as the transactions can be electronically transmitted.

     1.7 SWBT will provide a help desk function for electronic system
interfaces. 

     1.8 SWBT and LSP will jointly establish interface contingency and
disaster recovery plans for the pre-order, ordering and provisioning of Resale
services and UNE.

     1.9 SWBT reserves the right to modify or discontinue the use of any
system or


<PAGE>   153
                                                                    APPENDIX OSS
                                                                          PAGE 3

     interface as it deems appropriate.

     1.10 If LSP elects to utilize industry standardized electronic
interfaces for Resale or UNE, SWBT and LSP agree to work together in the Order
and Billing Forum (OBF) and the Telecommunications Industry Forum (TCIF) to
establish and conform to uniform industry standards for electronic interfaces
for pre-order, ordering, and provisioning. Neither Party waives its rights as
participants in such forums in the implementation of the standards.  To achieve
industry standard system functionality as quickly as possible, the Parties
acknowledge that SWBT may deploy these interfaces with requirements developed
in advance of industry standards.  Thus, subsequent modifications may be
necessary to comply with emerging standards.  LSP and SWBT are individually
responsible for evaluating the risk of developing their respective systems in
advance of standards and agree to support their own system modifications to
comply with new requirements.

 2.  PRE-ORDER

     2.1 SWBT will provide access to pre-order functions to support LSP
ordering of Resale services and UNE via several electronic interfaces. The
Parties acknowledge that ordering requirements necessitate the use of current,
real time pre-order information to accurately build service orders. The
following lists represent pre-order information that will be available to LSP
so that LSP order requests may be created to comply with SWBT ordering
requirements.

     2.2 PRE-ORDERING FUNCTIONS FOR RESALE SERVICES WILL INCLUDE:

         2.2.1 customer name, billing address and residence or business address,
billed telephone numbers and features and services available in the end office
where the customer is provisioned;

         2.2.2 features and services to which the customer subscribes (LSP
agrees that LSP's representatives will not access the information specified in
this Subsection until after the customer requests that the customer's local
exchange service provider be changed to LSP and such request complies with
conditions of Exhibit A of this Appendix.)

         2.2.3 a telephone number (if the customer does not have one assigned)
with the customer on-line.

         2.2.4 service availability dates to the customer;

         2.2.5 information regarding the dispatch / installation schedule, if
applicable;

         2.2.6 PIC options for intraLATA toll (when available) and interLATA
toll;

         2.2.7 address verification.

     2.3 PRE-ORDERING FUNCTIONS FOR UNE WILL INCLUDE:

         2.3.1 customer name, billing address and residence or business
address, billed 


<PAGE>   154
                                                                    APPENDIX OSS
                                                                          PAGE 4



telephone numbers and features and services available in the end
office where the customer is provisioned;

         2.3.2 features and services to which the customer subscribes (LSP
agrees that LSP's representatives will not access the information specified in
this Subsection until after the customer requests that the customer's local
exchange service provider be changed to LSP, and such request complies with
conditions of Exhibit A of this Appendix.)

         2.3.3 telephone number (if the customer does not have one assigned)
with the customer on-line;

         2.3.4 PIC options for intraLATA toll (when available) and interLATA
toll;

         2.3.5 address verification;

         2.3.6 channel facility assignment (CFA), network channel (NC), and
network channel interface (NCI) data.

     2.4 Electronic Access to Pre-Order Functions:  Upon request by LSP for
electronic access to pre-ordering functions, SWBT will provide LSP access to
one or more of the following systems:

         2.4.1 RESALE SERVICES PRE-ORDER SYSTEM AVAILABILITY:

               2.4.1.1 Residential Easy Access Sales Environment (R-EASE):
R-EASE is an ordering entry system through which SWBT will provide LSP access
for the functions of pre-ordering SWBT's Resale services so long as EASE is
utilized to order SWBT Residential Resale Services.

               2.4.1.2 Business Easy Access Sales Environment (EASE):  B-EASE
is an ordering entry system through which SWBT will provide LSP access for the
functions of pre-ordering SWBT's Resale services so long as such access is
utilized to order SWBT's Business Resale Services.

         2.4.2 RESALE AND UNE PRE-ORDER SYSTEM AVAILABILITY:

               2.4.2.1 DataGate:  DataGate is transaction-based data query
system through which SWBT will provide LSP access for the functions of gathering
pre-ordering information to support industry standardized ordering processes
for Residential and Business Resale services. When ordering Resale services or
UNE, LSP's representatives will have access to a pre-order electronic gateway
provided by SWBT for both consumer and business customers that provides
real-time access to SWBT's operations systems. This gateway shall be a
Transmission Control Protocol/Internet Protocol (TCP/IP) gateway and will allow
the LSP representatives to perform the pre-order functions for Resale services
and UNE, as described above. SWBT and LSP agree to work together to develop and
implement an electronic communication interface that will replace this initial
pre-order electronic interface consistent with industry standards developed by
the OBF and the TCIF.


<PAGE>   155
                                                                    APPENDIX OSS
                                                                          PAGE 5



               2.4.2.2 VERIGATE is an Access Service Pre-order system that will
also provide access to the pre-ordering functions for Resale Services and UNE.  
VERIGATE may be used in connection with electronic or manual ordering. 
VERIGATE provides the UNE pre-order capability of identifying CFA information,
NC, and NCI codes that are associated with order requirements for UNE.

     2.5 OTHER PRE-ORDER FUNCTION AVAILABILITY:
 
          2.5.1 Where due dates are not available electronically, SWBT will
provide LSP with due date interval for inclusion in the service order request.

          2.5.2 In addition to electronic interface access to pre-order
information, upon request, SWBT will provide LSP pre-order information in batch
transmission for the purposes of back-up data for periods of system
unavailability.  The parties recognize such information must be used to
construct order requests only in exception handling.

3.  ORDERING/PROVISIONING

     3.1 SWBT will provide access to ordering functions to support LSP
provisioning of Resale services and UNE via one or more electronic interfaces. 
Upon request for electronic access to ordering functions, SWBT will provide LSP
access to one or more of the following systems or interfaces:

     3.2 RESALE SERVICES ORDER REQUEST SYSTEM AVAILABILITY:

          3.2.1 R-EASE is available for the generation of Residential Resale
services orders.  Ordering Flows will be available via these systems for the
following ordering functions: Conversion ("as is" or "with changes"); Change
(Features, Listings, Long Distance); New Connect; Disconnect; From and To
(change of premises with same service).

          3.2.2 B-EASE is available for the generation of Business Resale
services orders. Ordering Flows will be available via these systems for the
following ordering functions: Conversion ("as is" or "with changes"); Change
(Features, Listings, Long Distance); New Connect; Disconnect; From and To
(change of premises with same service).

          3.2.3 SWBT will provide LSP with an Electronic Data Interexchange 
(EDI) Interface for transmission of industry-standardized Resale service order
requests in formats as defined by the Ordering and Billing Forum
(OBF) and EDI mapping as defined by TCIF. EDI ordering functionality
will be made available as negotiated and implemented in timeframes
mutually acceptable to SWBT and LSP.

     3.3 UNE SERVICE ORDER REQUEST ORDERING SYSTEM AVAILABILITY:

          3.3.1 In ordering and provisioning UNE, LSP and SWBT will utilize
mutually agreeable standard industry order formats and data elements developed
by OBF and TCIF EDI.  Where industry standards do not currently exist for the
ordering and provisioning of UNE, LSP and SWBT agree to jointly develop a form
for ordering Common-Use UNE. Common-Use UNE, including, without limitation,
tandem switching, signaling and call-related databases,


<PAGE>   156

                                                                    APPENDIX OSS
                                                                          PAGE 6



Operator Services and DA, and Operations Support Systems, shall be ordered in a
manner that is consistent with OBF Access Service Request Process; in addition
customized routing will be ordered in the same manner.  Customer Specific UNE,
including, Local Loop (which includes NID), and unbundled Local Switching,
and Interim Number Portability will be ordered consistent with the OBF Local
Service Request (LSR) process.

     3.4 SWBT will provision Resale Services and UNE as prescribed in LSP
order requests.  Access to status on such orders of Resale services and UNE
will be provided via the following electronic interfaces:

         3.4.1 Customer Network Administration (CNA)  will allow LSP to check
service order status via CNA.

         3.4.2 In cases of industry-standardized EDI ordering, SWBT will provide
to LSP an EDI electronic interface for transferring and receiving orders, Firm
Order Confirmation (FOC), service completion, and, as available, other
provisioning data and information.  SWBT will provide LSP with a FOC for each
Resale and UNE order.  The FOC includes but is not necessarily limited to: 
purchase order number, telephone number, Local Service Request number, due
date, Service Order number, and completion date.  Upon work completion, SWBT
will provide LSP with an 855 EDI transaction-based Order Completion that states
when that order was completed.  When available, SWBT will provide LSP an 865
EDI transaction-based Order Completion.

         3.4.3 A file transmission may be provided to confirm order completions
for R-EASE or B-EASE order processing.  This file will provide service order
information of all distributed and completed orders for LSP, regardless of
order entry mechanism.

 4.  MAINTENANCE/REPAIR

     4.1 Two electronic interfaces are accessible to place, and check the
status of, trouble reports for both Resale and UNE.  Upon request, LSP may      
access these functions via the following methods:

         4.1.1 CNA system access provides LSP with SWBT software that allows LSP
to submit trouble reports and subsequently check status on trouble reports for
LSP end-users.  CNA will provide ability to review the maintenance history of a
converted Resale LSP account.

         4.1.2 Electronic Bonding Interface (EBI) is an industry-standardized
interface that is available for trouble report submission and status updates. 
This EBI will  conform to ANSI standards T1:227:1995 and T1.228:1995,
Electronic Communications Implementation Committee (ECIC) Trouble Report Format
Definition (TFRD) Number 1 as defined in ECIC document ECIC/TRA/95-003, and all
standards referenced within those documents, as mutually agreed upon by LSP and
SWBT.  Functions currently implemented will include Enter Trouble, Request
Trouble Report Status, Add Trouble Information, Modify Trouble Report
Attributes, Trouble Report Attribute Value Change Notification, and Cancel
Trouble Report, as explained in 6 and 9 of ANSI T1.228:1995. LSP.  SWBT will
exchange requests over a mutually agreeable X.25-based network.


<PAGE>   157
                                                                   APPENDIX OSS
                                                                         PAGE 7

 5.  BILLING

     5.1 SWBT shall bill LSP for resold services and UNE.  SWBT shall
send associated billing information to LSP as necessary to allow LSP
to perform billing functions.  At minimum SWBT will provide LSP
billing information in a paper format or via magnetic tape, as agreed
to between LSP and SWBT.

     5.2 Upon request, electronic access to billing information for
Resale Services will also be available via the following interfaces:

        5.2.1 LSP may receive Bill Plus(TM), an electronic version of their
electronic bill as described in and in accordance with SWBT's Local Exchange
Tariff.

        5.2.2 LSP may receive a mechanized bill format via the industry
standards EDI.

        5.2.3 LSP may also view billing information through the CNA system.

        5.2.4 SWBT shall provide the Usage Billable Records for Resale Services
via EMR industry standard format with a daily feed.

        5.2.5 LSP may receive Local Disconnect Report records (via CARE
records) electronically that indicate when LSP's customers change their local
service provider.

     5.3 Upon request, electronic access to billing information for UNE will
also be available via the following interfaces:

         5.3.1 SWBT will make available a mechanized bill data tape (local)
format by February 1997.

         5.3.2 LSP may also view billing information through the CNA system.

         5.3.3 SWBT shall provide the Usage/Toll Billable Records for UNE via
EMR industry standard format with a daily feed.

         5.2.4 LSP may receive Local Disconnect Report records (via CARE
records) electronically that indicate when LSP's customers, utilizing SWBT
ports, change their local service provider.

 6.  REMOTE ACCESS FACILITY

     6.1 LSP must access the following SWBT's OSS functions via a LSP Remote
Access Facility (LRAF) located in Dallas, Texas:  R-EASE, B-EASE, CNA, DATAGATE
and VERIGATE.

     6.2 LSP may use three types of access:  Switched, Private Line, and
Frame Relay.  For Private Line and Frame Relay connections, LSP shall provide
its own router, circuit, and two Channel Service Units/Data Service Units
(CSU/DSU). The demarcation point shall be the router interface at the LRAF. 
Switched Access connections require LSP to provide its own


<PAGE>   158
                                                                    APPENDIX OSS
                                                                          PAGE 8


modems and connection to the SWBT LRAF.  LSP shall pay the cost of the call if
Switched Access is used. 

     6.3 LSP shall use TCP/IP to access SWBT OSS via the LRAF.  In addition,
each LSP shall have a valid Internet Protocol (IP) network address.  A user-id
/password unique to each individual accessing an OSS shall be maintained to
access SWBT OSS's.  LSP shall provide estimates regarding its volume of
transactions, number of concurrent users, desired number of private line or
dial-up (switched) connections, and length of a typical session.

     6.4 LSP shall attend and participate in implementation meetings to
discuss LSP LRAF access plans in detail and schedule testing of such
connections.  SWBT shall make a Help Desk function available to assist LSP on
an ongoing basis in accessing any SWBT OSS over the LRAF.

 7.  OPERATIONAL READINESS TEST (ORT) FOR ORDERING/PROVISIONING

     7.1 LSP must participate with SWBT in Operational Readiness Testing
(ORT), which will allow for the testing of the systems, interfaces, and
processes for the ordering and provisioning of Resale services. ORT will be
completed in conformance with agreed upon implementation dates.

 8.  RATES - ARKANSAS

     8.1 LSP requesting access to one or more of the SWBT OSS functions
(i.e., preordering, ordering / provisioning, maintenance / repair, billing)
agrees to pay the following rate: 

     System Access $ 3,030.00 / month

     8.2 LSP requesting functions via interfaces that require connection to
the Remote Access Facility, as described in section 6, agrees to pay the
following rate(s) depending upon on method of access utilized:

     Remote Access Facility Access Methods
                  Direct Connection Per Port           $ 1,560.00 / month
                  Dial Up Per Port                     $   312.00 / month

     8.4 LPS requesting the Bill Plus, as desribed in 5.2.1, agrees to pay
applicable tariffed rate, less Resale discount.

     8.3 LSP requesting the billing function for Usage Billable Records, as
described in 5.2.4, agrees to pay $.003 per message transmitted.

     8.4 LSP requesting the Local Disconnect Report, as described in 5.2.5,
agrees to pay $0.10 per record transmitted.

     8.4 Should unforeseen modifications and costs to provision OSS
functions become required by SWBT or industry standards, SWBT reserves the
right to modify its rate structure.   In addition, should LSP request custom
development of an exclusive interface to support OSS


<PAGE>   159

                                                                    APPENDIX OSS
                                                                          PAGE 9

functions, such development will be considered by SWBT on an Individual Case
Basis (ICB) and priced as such. 

9.  EFFECTIVE DATE, TERM

     9.1 The Appendix OSS will be effective upon approval by the state
commission when it determined that the entire Interconnection Agreement is in
compliance with Sections 251 and 252 of the Act.

     9.2 The Term Appendix OSS will be the shorter of the Term of this
Interconnection Agreement or December 31, 1998.  Continuation of Appendix OSS
follows the continuation rules of the Agreement.  Should the Interconnection
Agreement establish a new term, the Term of Appendix OSS will be the shorter of
one year, or the new Term of the Interconnection Agreement.  Should the term of
the Interconnection Agreement Expire without provision for continuance, the
Term of Appendix OSS expires as well.



<PAGE>   160

                                         APPENDIX OSS - RESALE & UNE - EXHIBIT A
                                                                     PAGE 1 OF 1


        BLANKET CERTIFICATION FOR END-USER AUTHORIZATION FOR RELEASE OF
                CUSTOMER PROPRIETARY NETWORK INFORMATION (CPNI)

The undersigned hereby agrees:

Before it may obtain CPNI of an end-user, whether via an independent request or
in the course of ordering SWBT's network elements or services via manual and/or
mechanized interfaces, the undersigned must, at least, certify that "yes" (Y)
it has obtained Authorization for Release of CPNI and provide the name of the
individual authorizing the release of CPNI.  By these indications, the
undersigned affirms that a current Authorization for the Release of CPNI has
been obtained from an end-user and that it includes the expressed content of
the language, "Minimum Scope."  SWBT may then provide the CPNI referenced
herein.

      Minimum Scope:  Authorization for the release of CPNI

      1)   An affirmative written request that substantially reflects the
           following:  "This document serves as instruction to all holders of
           my local exchange telecommunications Customer Proprietary Network
           Information (CPNI) to provide such information to the undersigned.  
           I understand that this CPNI includes the following information: 
           billing name, service address, billing address, service and feature
           subscription, directory listing information long distance carrier
           identity, and all pending service order acitivity.  This
           Authorization remains in effect until such time that I revoke it
           directly or appoint another individual/company with such capacity or
           undersigned receives notice to disconnect my local exchange service
           or notice that a service disconnect has been performed. At and from
           such time, this Authorization is null and void."

      or

      2)   Authorization for change in local exchange service and release
           of CPNI with documentation that adheres to all requirements of state
           and federal law, as applicable.

                                      __________________________________________
                                      Signed

                                      __________________________________________
                                      Name (Typed/Printed)

                                      __________________________________________
                                      Title

                                      __________________________________________
                                      Company

                                      __________________________________________
                                      Date


<PAGE>   161



                                                     APPENDIX OSS - RESALE & UNE
                                                                  SIGNATURE PAGE
                                                                     PAGE 1 OF 1


DIGITAL TELEPORT, INC. (MISSOURI)            SOUTHWESTERN BELL TELEPHONE COMPANY


By:___________________________               By:________________________________
      (name printed or typed)                       (name printed or typed)


Signature:____________________               Signature:_________________________


Title:________________________               Title:_____________________________
      (printed or typed)                                (printed or typed)


Date:_________________________               Date:______________________________

<PAGE>   162
                                                                   APPENDIX 0S  
                                                                   PAGE 2 OF 8




                                 APPENDIX OS

                              OPERATOR SERVICES

This Appendix sets forth the terms and conditions under which Southwestern Bell
Telephone Company ("SWBT") agrees to provide Operator Services for LSP ("LSP").

I.   SERVICES

     SWBT will provide the following Operator Services:

     A.   FULLY AUTOMATED CALL PROCESSING - Allows the caller to complete
          a call utilizing equipment without the assistance of a SWBT operator,
          hereafter called "Operator."

          This allows the caller the option of completing calls through an
          automated alternate billing system (AABS).  Automated functions
          can only be activated from a touch-tone telephone. Use of a rotary
          telephone and failure or low response by the caller to the audio
          prompts will bridge the caller to an Operator for assistance.  The
          called party must also have Touch-tone service to automatically
          accept calls that are billed collect or to a third number.

     B.   OPERATOR-ASSISTED CALL PROCESSING - Allows the caller to
          complete a call by receiving assistance from an Operator.

II.  DEFINITIONS

     A. FULLY AUTOMATED CALL PROCESSING

     SWBT will support the following fully automated call types for LSP:

             1.   FULLY AUTOMATED CALLING CARD STATION-TO-STATION - 
                  This service is provided when the caller dials zero ("0"),
                  plus the desired telephone number and the telecommunications
                  calling card number to which the call is to be
                  charged.  The call is completed without the assistance of
                  an Operator.  An authorized telecommunications calling card
                  for the purpose of this Appendix, is one for which SWBT can
                  perform billing validation. Fully-Automated Calling Card
                  Call Service may also include the following situations:

                  a.   When an individual with a
                       disability dials zero (0) and identifies himself or
                       herself as disabled, he or she will provide the
                       Operator the desired telephone number and the calling
                       card number to which the call is to be billed.

<PAGE>   163
                                                                   APPENDIX OS
                                                                   PAGE 3 OF 8

                  b.   When due to trouble on the network, or lack of service 
                       components (facilities to the AABS network), the 
                       automated call processing cannot be completed without 
                       assistance from an Operator.

                  c.   When an Operator reestablishes an
                       interrupted call that meets any of the situations
                       described in this call type.

             2.   FULLY AUTOMATED STATION-TO-STATION - This
                  service is limited to those calls placed collect or billed to
                  a third number.  The caller dials zero (0) plus the telephone
                  number desired, the service selection codes and/or billing
                  information as instructed by the automated equipment.  The
                  call is completed without the assistance of an Operator.
                  Fully Automated Station-to-Station service may also include
                  the following situations:

                  a.   When an individual with a
                       disability identifies himself or herself as disabled
                       and provides the Operator the number to which the call
                       is to be billed (either collect or third number).
                  
                  b.   When due to trouble on the
                       network or lack of service components, the automated
                       call cannot be completed without assistance from an
                       Operator.
                  
                  c.   When an Operator reestablishes an
                       interrupted call that meets any of the situations
                       described in this call type.

     B.      OPERATOR-ASSISTED CALL PROCESSING

     SWBT will support the following operator-assisted call types for LSP:

             1.   SEMI-AUTOMATED STATION-TO-STATION - A service
                  provided when the caller dials zero (0) plus the telephone
                  number desired and the call is completed with the
                  assistance of an Operator.  Semi-Automated Station-to-Station
                  service may also include the following situations:

                  a.   Where the caller does not dial
                       zero (0) prior to calling the number desired from a
                       public or semi-public telephone, or from a telephone
                       where the call is routed directly to an Operator
                       (excluding calling card calls).
                  
                  b.   When an Operator re-establishes
                       an interrupted call that meets any of the situations
                       described in this call type.

<PAGE>   164
                                                                    APPENDIX OS 
                                                                    PAGE 4 OF 8


             2.   SEMI-AUTOMATED PERSON-TO-PERSON - A service in
                  which the caller dials zero (0) plus the telephone number
                  desired and specifies to the Operator the particular person
                  to be reached or a particular PBX station, department or
                  office to be reached through a PBX attendant. This service
                  applies even if the caller agrees, after the connection is
                  established, to speak to any party other than the party
                  previously specified.  Semi-Automated Person-to-Person
                  service may also include:

                  a.   Where the caller does not dial a
                       zero (0) prior to dialing the number from a public or
                       semi-public telephone, or where the call is routed
                       directly to an Operator.
                  
                  b.   When an operator reestablishes an
                       interrupted call that meets any of the situations
                       described in this call type.

             3.   SEMI-AUTOMATED CALLING CARD STATION-TO-STATION -
                  A service provided when the caller dials zero (0) plus the
                  desired telephone number and provides the Operator the
                  calling card number to which the call is to be charged.
                  Semi-Automated Calling Card Station-to-Station service may
                  also include the following situations:

                  a.   When the caller does not dial
                       zero (0) prior to dialing the number desired from a
                       public or semi-public telephone, or from a telephone
                       that is directly routed to an Operator, and the call
                       is billed to a calling card.
                  
                  b.   When an Operator reestablishes an
                       interrupted call that meets any of the situations
                       described in this call type.

             4.   STATION-TO-STATION (OPERATOR HANDLED) - A
                  service provided when the caller dials zero (0) and places a
                  sent paid, collect, third number or calling card
                  station-to-station call using an Operator's assistance. These
                  calls may originate from a private, public or semi-public
                  telephone. The service may also include the situation when an
                  Operator reestablishes an interrupted call that meets any of
                  the situations described in this call type.

             5.   PERSON-TO-PERSON (OPERATOR HANDLED) - A service
                  in which the caller dials zero (0) and specifies to the
                  Operator the number desired and the person to be reached, or
                  a particular PBX station, department or office to be reached
                  through a PBX attendant, or a particular mobile service point
                  to be reached through a mobile telephone attendant.  The call
                  remains a person-to-person call even if the caller agrees,
                  after the connection is established, to speak to any party
                  other than the party previously specified.  The service may
                  also include situations when an 


<PAGE>   165
                                                                    APPENDIX OS
                                                                    PAGE 5 OF 8


                  Operator reestablishes an interrupted call that meets
                  any of the situations described in this call type.

             6.   LINE STATUS VERIFICATION - A service in which
                  the caller asks the Operator to determine the condition of a
                  telephone line.

             7.   BUSY LINE INTERRUPT - A service in which the
                  caller asks the Operator to interrupt a conversation in
                  progress, to determine if one of the parties is willing to
                  speak to the caller requesting the interrupt. A Busy Line
                  Interrupt charge will apply even if no conversation is in
                  progress at the time of the interrupt attempt, or when the
                  parties interrupted refuse to terminate the conversation in
                  progress.

             8.   0PERATOR TRANSFER SERVICE - A service offered
                  by SWBT in which the local caller requires Operator
                  Assistance for completion of a call outside the originating
                  LATA.  The SWBT Operator transfers the call to an
                  interexchange carrier selected by the caller from a list of
                  IXCs provided to SWBT by the LSP.   This transfer service is
                  similar to SWBT's "Operator Transfer" service offering.  LSP
                  agrees to obtain all necessary compensation arrangements
                  between LSP and participating carriers.

             9.   MISCELLANEOUS - Includes the following call
                  types: General Assistance and Rate Quotes, 800, 888 and
                  connections to all other Toll Free services, Repair Bureau
                  and Business Office requests, credit requests, NPA-NXX
                  location requests, and all other 0- No Attempt services.

III. CALL BRANDING AND RATE REFERENCE REQUIREMENTS

      A.   REQUIREMENTS  -  Pursuant to Section  226 (b) of The
           Telecommunications Act of 1996, each provider of Operator Services
           is required to:

           1.  provide its brand at the beginning of each telephone call and
               before the consumer incurs any charge for the call; and

           2.  disclose immediately to the consumer, upon request a quote of its
               rates or charges for the call.

      B.   CALL BRANDING - In compliance with A. 1. above, SWBT will
           brand Operator Services in LSP's name based upon the criteria
           outlined below:

           1.  LSP will provide SWBT with written specification of
               its company name to be used in creating LSP specific branding
               messages for its OS calls.

<PAGE>   166
                                                                    APPENDIX OS
                                                                    PAGE 6 OF 8


           2.  An initial non-recurring charge applies per TOPS
               switch, per load for the establishment of Call Branding as
               well as a charge per TOPS switch, per subsequent load to
               change the brand.  In addition, a per call charge applies for
               every Operator Services call handled by SWBT on behalf of LSP
               when such services are provided in conjunction with: i) the
               purchase of SWBT's unbundled local switching; or ii) when
               multiple brands are required on a single Operator Services
               trunk.  Prices for Call Branding are as outlined in Exhibit
               II, attached hereto and incorporated herein.

      C.   OPERATOR SERVICES (OS) RATE/REFERENCE INFORMATION - In
           compliance with A. 2. above, SWBT will provide LSP Operator Services
           Rate/Reference Information based upon the criteria outlined below:

           1.  LSP  will furnish OS Rate and Reference Information
               in a mutually agreed to format or media thirty (30) days in
               advance of the date when the Operator Services are to be
               undertaken.

           2.  LSP  will inform SWBT, in writing, of any changes to
               be made to such Rate/Reference Information ten (10) working
               days prior to the effective Rate/Reference change date.  LSP
               acknowledges that it is responsible to provide SWBT updated
               Rate/Reference Information in advance of when the
               Rates/Reference Information are to become effective.

           3.  In all cases when a SWBT Operator receives a rate
               request from a LSP end user, SWBT will quote the applicable
               OS rates as provided by LSP.

           4.  An initial non-recurring charge will apply per
               TOPS switch for loading of LSP's Operator Services
               Rate/Reference Information as well as a charge per TOPS
               switch, for each subsequent change to either LSP's Operator
               Services Rate or Reference Information.

IV.  HANDLING OF EMERGENCY CALLS TO OPERATOR

     To the extent LSP's NXX encompasses multiple emergency agencies, SWBT will
     agree to query the caller on his/her community and to transfer the caller
     to the appropriate emergency agency for the caller's area.  LSP must
     provide SWBT with the correct information to enable the transfer. When the
     assistance of another Carrier's operator is required, SWBT will attempt to
     reach the appropriate operator if the network facilities for inward
     assistance exist.  LSP agrees to indemnify SWBT for any misdirected calls.

V.   RESPONSIBILITIES OF THE PARTIES

     A.   SWBT will be the sole provider of Operator Services for LSP's
          local service area(s) listed in Exhibit I, which is attached to this
          Appendix, beginning on the service effective date also shown in
          Exhibit I.  SWBT will provide Operator 


<PAGE>   167
                                                                    APPENDIX OS
                                                                    PAGE 7 OF 8


           Services only where the necessary physical facilities
           are available and in place and under conditions previously stated in
           this Appendix.

      B.   LSP will be responsible for providing the equipment and
           facilities necessary for signaling and routing calls with Automatic
           Number Identification (ANI) to each SWBT operator switch.  Should
           LSP seek to provide interexchange Operator Services under this
           agreement, it is responsible for ordering the necessary facilities
           through SWBT's interstate or intrastate Access Service tariffs.
           Nothing in this agreement in any way changes the manner in which an
           interexchange Carrier obtains access service for the purpose of
           originating or terminating interexchange traffic.

      C.   Facilities necessary for the provision of Operator Services
           shall be provided by the parties hereto, using standard trunk
           traffic engineering procedures to insure that the objective grade of
           service is met.  Each party shall bear the costs for its own
           facilities.  LSP shall bear the costs of facilities necessary for
           signaling and routing calls with Automatic Number Identification
           (ANI) to each SWBT operator switch.  SWBT shall bear the cost of
           facilities and equipment necessary to provide Operator Services.

      D.   LSP will furnish in writing to SWBT, thirty (30) days in advance
           of the date when the Operator Services are to be undertaken, unless
           otherwise agreed to by the SWBT, all records required by SWBT to
           provide the Operator Services.

      E.   LSP will keep all records furnished to SWBT current by using
           reporting forms and procedures that are mutually acceptable to both
           parties, and will inform SWBT in advance of any changes to be made
           in such records.  SWBT will specify the required interval for such
           advance notice.  LSP will provide all records and changes to records
           to SWBT in writing or in any other mutually agreeable format.

      F.   SWBT will accumulate and provide the LSP such data as
           necessary for the LSP to verify traffic volumes and bill its end
           users.

VI.   METHODS AND PRACTICES

      SWBT will provide the Operator Services to LSP's end users in accordance
      with SWBT's OS methods and practices in effect for SWBT at the time the
      OS call is made, unless otherwise agreed in writing by both parties.

VII.  PRICING

      Pricing for Operator Services shall be based on the rates specified in
      Exhibit II, PRICING, which is attached and made part of this Appendix.
      The rates will apply from the service effective date through the term of
      this agreement as specified in paragraph X., 


<PAGE>   168
                                                                    APPENDIX OS
                                                                    PAGE 8 OF 8


      A. below.  At any time beyond the specified or the term of this
      Appendix, SWBT may change the prices for the provision of OS upon one
      hundred-twenty (120) days' notice to LSP.

VIII. MONTHLY BILLING

      SWBT will render monthly billing statements to LSP, and remittance in
      full will be due within thirty (30) days of receipt.

IX.   LIABILITY

      A.   In addition to the liability provisions contained in the
           Agreement, LSP agrees to defend, indemnify, and hold harmless SWBT
           from any and all losses, damages, or other liability including
           attorneys fees that LSP may incur as a result of claims, demands,
           wrongful death actions, or other suits brought by any party that
           arise out of LSP's end users use of Operator Services.  LSP shall
           defend against all end user claims just as if LSP had provided such
           service to its end user with the LSP's own operators and shall
           assert its tariff limitation of liability for benefit of both SWBT
           and LSP.

      B.   LSP also agrees to release, defend, indemnify, and hold
           harmless SWBT from any claim, demand or suit that asserts any
           infringement or invasion of privacy or confidentiality of any
           person or persons caused or claimed to be caused, directly, or
           indirectly, by SWBT employees and equipment associated with
           provision of the Operator Services. This provision includes but is
           not limited to suits arising from disclosure of the telephone
           number, address, or name associated with the telephone called or the
           telephone used to call the Operator Services.

X.    TERMS OF APPENDIX

      A.   Unless sooner terminated, this Appendix will continue in
           force for a period of one (1) year from the effective date of this
           agreement and thereafter until terminated by one hundred-twenty
           (120) days notice in writing from either Party to the other.

      B.   If LSP terminates this agreement prior to the agreed-upon
           term of this Appendix, LSP  shall pay, within thirty (30) days of
           the issuance of a final bill by SWBT, all amounts due for actual
           services provided under this Appendix, plus estimated monthly
           charges for the remainder of the term.  Estimated charges will be
           based on an average of the actual monthly amounts billed by SWBT
           pursuant to this Appendix prior to its termination.

      C.   The rates applicable for determining the amount(s) under the
           terms outlined in this Section are those specified in Exhibit II.

<PAGE>   169
                                                           APPENDIX OS-EXHIBIT I
                                                                     PAGE 1 OF 1



                                 APPENDIX OS
                            LOCAL SERVICE AREA(S)

                         EFFECTIVE:    
                                   -----------------
                                          (mm/dd/yr)

The following table depicts the service area(s) covered by this Appendix:

   LSP'S LOCAL SERVICE AREA(S)            EFFECTIVE DATE
- ----------------------------------------------------------------

- ----------------------------------------------------------------

- ----------------------------------------------------------------

- ----------------------------------------------------------------

- ----------------------------------------------------------------

- ----------------------------------------------------------------




<PAGE>   170
                                                          APPENDIX OS-EXHIBIT II
                                                                     PAGE 1 OF 1







                                 APPENDIX OS
                                  ARKANSAS
                                 EXHIBIT II
                          PRICING - FCILITIES BASED

                         EFFECTIVE: 
                                    -----------------------
                                          (mm/dd/yr)

The following rates will apply for each service element:

<TABLE>
          <S><C>                                                                               
          A.  FULLY AUTOMATED CALL PROCESSING                                                  
                                                                                               
                                                                                               
          This usage rate applies to each call that has been completed on a                    
          fully automated basis.                                                               
                                                                                               
                                           Rate per completed automated call   $     0.157     
                                                                                               
          B.  OPERATOR-ASSISTED CALL PROCESSING                                                
                                                                                               
                                                                                               
          This usage rate applies to each call that has been answered by or                    
          forwarded to an operator.                                                            
                                                                                               
                                                                                               
                                                  Rate per actual work second  $     0.016     
                                                                                               
          C.  CALL BRANDING                                                                    
                                                                                               
                                                                                               
          An initial non-recurring charge applies per TOPS switch, per brand                   
          for the establishment of LSP specific Call Branding.  An additional                  
          non-recurring charge applies for each subsequent change to the                       
          branding                                                                             
                                                                                               
                                                                                               
                                                  Rate per initial load group    $  2,230.00     
                                               Rate per load for Brand change    $  2,230.00     
                                                                     Per Call(1) $      0.02     
                                                                                               
          D.  OPERATOR SERVICES RATE/REFERENCE                                                 
              INFORMATION                                                                          
                                                                                               
                                                                                               
          An initial non-recurring charge applies per TOPS switch, per rate                    
          schedule, for the initial load of LSP's Operator Services                            
          Rate/Reference Information. An additional non-recurring charge                       
          applies for each subsequent change to Rate/Reference Information.                    
                                                                                               
                                                                                               
                                                        Rate per initial load  $  3,430.00     
                                              Rate per subsequent rate change  $  2,450.00     
                                         Rate per subsequent reference change  $  2,450.00     
                                                                                               
</TABLE>

- ---------------------
(1) A per call charge will apply when OS are provided in conjunction with: 
i) unbundled local switching or ii) when multiple brands are required on a
single operator services trunk


<PAGE>   171
                                                                    APPENDIX NIM
                                                                     PAGE 2 OF 5


      APPENDIX NETWORK INTERCONNECTION METHODS (NIM)

      This Appendix NIM designates Network Interconnection Methods (NIMs) to be
      used by the Parties. These include, but are not limited to: MidSpan Fiber
      Interconnection (MSFI); Virtual Collocation Interconnection; SONET Based
      Interconnection; Physical Collocation Interconnection; leasing of SWBT
      facilities; and other methods as mutually agreed to by the Parties.

1.    MID-SPAN FIBER INTERCONNECTION (MSFI)

      Mid-Span Fiber Interconnection (MSFI) between Southwestern Bell Telephone
      (SWBT) and LSP can occur at any mutually agreeable, economically and
      technically feasible point between LSP's premises and a SWBT tandem or
      end office. This interconnection will be on a point-to-point SONET system
      over single mode fiber optic cable.

      MSFI may be used to provide interconnection trunking as defined in
      Appendix ITR to Attachment 11:  Network Interconnection Architecture.

A.    There are two basic mid-span interconnection designs:

      1.     Design One:  LSP's fiber cable and SWBT's fiber cable are
             connected at an economically and technically feasible point
             between the LSP location and the last entrance manhole at the SWBT
             central office.

             The Parties may agree to a location with access to an
             existing SWBT fiber termination panel.  In these cases, the
             network interconnection point (POI) shall be designated outside of
             the SWBT building, even though the LSP fiber may be physically
             terminated on a fiber termination panel inside of a SWBT building.
             In this instance, LSP will not incur fiber termination charges
             and SWBT will be responsible for connecting the cable to the SWBT
             facility.

             The Parties may agree to a location with access to an
             existing LSP fiber termination panel.  In these cases, the network
             interconnection point (POI) shall be designated outside of the LSP
             building, even though the SWBT fiber may be physically terminated
             on a fiber termination panel inside of an LSP building.  In this
             instance, SWBT will not incur fiber termination charges and LSP
             will be responsible for connecting the cable to the LSP facility.

             If a suitable location with an existing fiber termination panel
             cannot be agreed upon, LSP and SWBT shall mutually determine
             provision of a fiber termination panel housed in an outside, above
             ground, cabinet placed at the physical POI.  Ownership and the
             cost of provisioning the panel will be negotiated between the two
             parties. 


<PAGE>   172

                                                                    APPENDIX NIM
                                                                     PAGE 3 OF 5



      2.     Design Two:  LSP will provide fiber cable to the last entrance
             manhole at the SWBT tandem or end office switch with which LSP
             wishes to interconnect.  LSP will provide a sufficient length of
             fiber optic cable for SWBT to pull the fiber cable to the SWBT
             cable vault for termination on the SWBT fiber distribution frame
             (FDF).  In this case the POI shall be at the manhole location.

             Each Party is responsible for designing, provisioning,
             ownership and maintenance of all equipment and facilities on its
             side of the POI.  Each Party is free to select the manufacturer of
             its Fiber Optic Terminal (FOT).  Neither Party will be allowed to
             access the Data Communication Channel (DCC) of the other Party's
             FOT. The Parties will work cooperatively to achieve equipment
             compatibility.

B.    The Parties will mutually agree upon the precise terms of each mid-span
      interconnection facility.  These terms will cover the technical details of
      the interconnection as well as other network interconnection, provisioning
      and maintenance issues.

C.    The LSP location includes FOTs, multiplexing and fiber required to take
      the optical signal handoff from SWBT for interconnection trunking as
      outlined in Appendix ITR.

D.    The fiber connection point may occur at several locations:

      1.     a location with an existing SWBT fiber termination panel.  In
             this situation, the POI shall be outside the SWBT building which
             houses the fiber termination panel;

      2.     a location with access to an existing LSP fiber termination
             panel.  In these cases, the network interconnection point (POI)
             shall be designated outside of the LSP building, even though the
             SWBT fiber may be physically terminated on a fiber termination
             panel inside a LSP building;

      3.     a location with no existing SWBT fiber termination panel.  In
             this situation, SWBT and LSP will negotiate provisioning,
             maintenance and ownership of a fiber termination panel and above
             ground outside cabinet as a POI and for connection of the fiber
             cables;

      4.     a manhole outside of the SWBT central office.  In this
             situation,  LSP will provide sufficient fiber optic cable for SWBT
             to pull the cable into the SWBT cable vault for termination on the
             SWBT FDF.  The POI will be at the manhole and SWBT will assume
             maintenance responsibility for the fiber cabling from the manhole
             to the FDF.

E.    The SWBT tandem or end office switch includes all SWBT FOT, multiplexing
      and fiber required to take the optical signal hand-off provided from LSP
      for interconnection trunking as outlined in Appendix ITR.  This location
      is SWBT's responsibility to provision and maintain.


<PAGE>   173

                                                                    APPENDIX NIM
                                                                     PAGE 4 OF 5


F.    In both designs, LSP and SWBT will mutually agree on the  capacity of
      the FOT(s) to be utilized.  The capacity will be based on equivalent DS1s
      that contain trunks and interLATA traffic.  Each Party will also agree
      upon the optical frequency and wavelength necessary to implement the
      interconnection.  The Parties will develop and agree upon methods for the
      capacity planning and management for these facilities, terms and
      conditions for over provisioning facilities,  and the necessary processes
      to implement facilities as indicated below.  These methods will meet
      quality standards as mutually agreed to by LSP and SWBT.

2.    AVOIDANCE OF OVER PROVISIONING

      Underutilization is the inefficient deployment and use of the network due
      to forecasting a need for more capacity than actual usage requires, and
      results in unnecessary costs for SONET systems.  To avoid over
      provisioning, the Parties will agree to joint facility growth planning as
      detailed below.

3.    JOINT FACILITY GROWTH PLANNING

      The initial fiber optic system deployed for each interconnection shall be
      the smallest standard available.  For SONET this is an OC-3 system.  The
      following list the criteria and processes needed to satisfy additional
      capacity requirements beyond the initial system.

A.    Criteria:

      1. Investment is to be minimized;

      2. Facilities are to be deployed in a "just in time" fashion.

B.    Processes

      1. discussions to provide relief to existing facilities will be
         triggered when either Party recognizes that the overall system
         facility (DS1s) is at 90% capacity;

      2. both Parties will perform a joint validation to ensure current
         trunks have not been over-provisioned.  If any trunk groups are
         over-provisioned, trunks will be turned down as appropriate.  If
         any trunk resizing lowers the fill level of the system below 90%,
         the growth planning process will be suspended and will not be
         reinitiated until a 90% fill level is achieved. Trunk design
         blocking criteria described in Appendix ITR will be used in
         determining trunk group sizing requirements and forecasts;

      3. if based on the forecasted equivalent DS1 growth, the existing
         fiber optic system is not projected to exhaust within one year,
         the Parties will suspend further  relief


<PAGE>   174

                                                                    APPENDIX NIM
                                                                     PAGE 5 OF 5


         planning on this interconnection until a date one year prior
         to the projected exhaust date.  If growth patterns change during
         the suspension period, either Party may re-initiate the joint
         planning process;

      4. if the placement of a minimum size FOT will not provide
         adequate augmentation  capacity for the joint forecast over a two
         year period, and the forecast appears reasonable based upon
         history, the next larger system may be deployed.  In the case of a
         SONET system, the OC-3 system could be upgraded to an OC-12.  If
         the forecast does not justify a move to the next larger system,
         another minimal size system (such as on OC-3) could be placed.
         This criteria assumes both Parties have adequate fibers for either
         scenario.  If adequate fibers do not exist, both Parties would
         negotiate placement of additional fibers;

      5. both Parties will negotiate a project service date and
         corresponding work schedule to construct relief facilities in an
         effort to achieve "just in time" deployment;

      6. the joint planning process/negotiations should be completed
         within two months of identification of 90% fill.

4.    VIRTUAL COLLOCATION INTERCONNECTION

      The description of Virtual Collocation Interconnection is contained in
      SWBT's Virtual Collocation tariffs (i.e.,  SWBT's Tariff F.C.C. No. 73).

5.    SONET-BASED INTERCONNECTION

      The description of SONET-Based Interconnection is contained in SWBT's
      Sonet-Based Interconnection tariffs (i.e.,  SWBT's Tariff F.C.C. No. 73).

6.    PHYSICAL COLLOCATION INTERCONNECTION

      SWBT will provide Physical Collocation Interconnection on
      nondiscriminatory terms and conditions at the time LSP requests such
      interconnection.

7.    LEASING OF SWBT'S FACILITIES

      LSP's leasing of SWBT's facilities for purposes of Attachment 11:  Network
      Interconnection Architecture will be subject to the mutual agreement of
      the Parties.


<PAGE>   175



                       PHYSICAL COLLOCATION AGREEMENT




                                   BETWEEN




                     SOUTHWESTERN BELL TELEPHONE COMPANY



                                     AND


                           DIGITAL TELEPORT, INC.



<PAGE>   176



                              TABLE OF ARTICLES



      ARTICLE I - PREMISES...........................................   -1-
                                                                           
      ARTICLE II - EFFECTIVENESS AND REGULATORY APPROVAL.............   -2-
                                                                           
      ARTICLE III - TERM.............................................   -3-
                                                                           
      ARTICLE IV - PREMISES CHARGES..................................   -4-
                                                                           
      ARTICLE V - INTERCONNECTION CHARGES............................   -7-
                                                                           
      ARTICLE VI  - FIBER OPTIC CABLE AND DEMARCATION POINT..........   -7-
                                                                           
      ARTICLE VII - USE OF PREMISES..................................   -8-
                                                                           
      ARTICLE VIII - STANDARDS.......................................  -10-
                                                                           
      ARTICLE IX - RESPONSIBILITIES OF THE INTERCONNECTOR............  -11-
                                                                           
      ARTICLE X - QUIET ENJOYMENT....................................  -13-
                                                                           
      ARTICLE XI - ASSIGNMENT........................................  -13-
                                                                           
      ARTICLE XII - CASUALTY LOSS....................................  -13-
                                                                           
      ARTICLE XIII - RE-ENTRY........................................  -14-
                                                                           
      ARTICLE XIV -  LIMITATION OF LIABILITY.........................  -15-
                                                                           
      ARTICLE XV - INDEMNIFICATION OF SWBT...........................  -16-
                                                                           
      ARTICLE XVI - SERVICES, UTILITIES, MAINTENANCE AND FACILITIES..  -17-
                                                                           
      ARTICLE XVII - LIMITATION OF ACTIONS; DISPUTE RESOLUTION.......  -17-
                                                                           
      ARTICLE XVIII - SUCCESSORS BOUND...............................  -19-
                                                                           
      ARTICLE XIX - CONFLICT OF INTEREST.............................  -19-
                                                                           
      ARTICLE XX - NON-EXCLUSIVE REMEDIES............................  -20-
                                                                           
      ARTICLE XXI - NOTICES..........................................  -20-
                                                                           
      ARTICLE XXII - COMPLIANCE WITH LAWS............................  -20-
                                                                           
      ARTICLE XXIII - OSHA STATEMENT.................................  -21-
                                                                           
      ARTICLE XXIV - INSURANCE.......................................  -21-
                                                                           
      ARTICLE XXV - SWBT'S RIGHT OF ACCESS...........................  -24-
                                                                           
      ARTICLE XXVI - PURPOSE AND SCOPE OF AGREEMENT..................  -24-
                                                                           
      ARTICLE XXVII - MISCELLANEOUS..................................  -25-



<PAGE>   177
                         PHYSICAL COLLOCATION AGREEMENT

         THIS PHYSICAL COLLOCATION AGREEMENT ("Agreement") is made this _____
day of __________ , 19____ by and between SOUTHWESTERN BELL TELEPHONE COMPANY, a
Missouri corporation ("SWBT"), and Digital Teleport, Inc., a [STATE OF
INCORPORATION] corporation ("Interconnector").

                                   WITNESSETH

         WHEREAS, SWBT is an incumbent local exchange carrier having a statutory
duty to provide for "physical collocation" of "equipment necessary for
interconnection or access to unbundled network elements" at its premises, 47
U.S.C. 251(c)(6);
         WHEREAS, the Interconnector wishes to physically locate certain of its
equipment within the Premises (as defined herein) and connect with SWBT;
         NOW THEREFORE, in consideration of the mutual agreements and covenants
contained herein and other good and valuable consideration, the receipt and
sufficiency of which is hereby acknowledged, SWBT and the Interconnector (the
"parties") agree as follows:

                              ARTICLE I - PREMISES

         1.1 Right to Use. Subject to this Agreement, SWBT grants to
Interconnector the right to use the premises described on Exhibit ____
("Premises"), attached and incorporated herein, within real property at _______
____  in the City of ___________, County of ____________, State of
________________.
         1.2 Relocation. Notwithstanding Section 1.1, in the event that SWBT
determines it necessary for the Premises to be moved within the building in
which the Premises is located ("Building") or to another SWBT wire center, the
Interconnector is required to do so. In such an event, the Interconnector shall
be responsible for the preparation of the new premises at the new location if
such relocation arises from circumstances beyond the reasonable control of SWBT,
including condemnation 



<PAGE>   178

                                      -2-

or government order or regulation that makes the continued occupancy of the
Premises or Building uneconomical in SWBT's sole judgment. Otherwise SWBT shall
be responsible for any such preparation.
         In the event that the Interconnector requests that the Premises be
moved within the Building or to another SWBT wire center, SWBT shall permit the
Interconnector to relocate the Premises, subject to the availability of space
and associated requirements. The Interconnector shall be responsible for all
applicable charges associated with the move, including the reinstallation of its
equipment and facilities and the preparation of the new Premises and the new
wire center as applicable.
         In either such event, the new premises shall be deemed the "Premises"
hereunder and the new wire center the "Building."
         1.3 The Premises. SWBT agrees, at the Interconnector's sole cost and
expense as set forth herein, to prepare the Premises in accordance with working
drawings and specifications entitled ___________ and dated _________ , which 
documents, marked Exhibit ___________, are attached and incorporated herein. The
preparation shall be arranged by SWBT in compliance with all applicable
codes, ordinances, resolutions, regulations and laws. After the Interconnector
has made the initial payments required by Section 4.4 and the state regulatory
approval is obtained in accordance with Section 2.1 hereof, SWBT agrees to
pursue diligently the preparation of the Premises for use by the
Interconnector.

               ARTICLE II - EFFECTIVENESS AND REGULATORY APPROVAL

         2.1 Submission to State Commission. The effectiveness of this 
Agreement is conditioned upon the unqualified approval of this
Agreement, whether as a result of an approval process or by operation of law,
under 47 U.S.C. 252(a)(1). After execution of this Agreement, the parties shall
submit it to the State commission for the State in which the Premises is
located as thereby required for approval, and shall defend the Agreement and
support any reasonable effort to have this Agreement so approved, 





<PAGE>   179

                                      -3-

including the supplying of witnesses and testimony if a hearing is to be held.
      2.2 Failure to Receive Approval. In the event that this Agreement does not
receive such unqualified approval, this Agreement shall be void upon written
notice of either party to the other after such regulatory action becomes final
and unappealable. Thereafter Interconnector may request to begin negotiations
again under 47 U.S.C. 251. Alternatively, the parties may both agree to modify
this Agreement to receive such approval, but neither shall be required to agree
to any modification. Any agreement to modify shall not waive the right of either
party to pursue any appeal of the ruling made by any reviewing regulatory
commission.
      2.3 Preparation Prior to Regulatory Approval. At the written election of
the Interconnector, SWBT shall begin preparing the Premises for the
Interconnector prior to receiving the approval required by Section 2.1 hereof.
The sole evidence of such election shall be the payment to SWBT of the initial
payments specified in Sections 4.4. Payment to SWBT of the remaining charges
under these Sections shall be due upon completion. Upon such an election, this
Agreement shall become effective but only insofar as to be applicable to the
Premises preparation. In the event that the Agreement does not become fully
effective as contemplated by this Article, the Interconnector shall not be
entitled to any refund or return of any such payments beyond any portion of the
charges paid but not attributable to costs incurred by SWBT. To the extent that
SWBT has incurred preparation costs not included within any payment made by the
Interconnector, the Interconnector shall pay those costs within thirty (30) days
of notice by SWBT.

                               ARTICLE III - TERM

      3.1 Commencement Date. This Agreement shall be month-to-month, beginning
on the "Commencement Date." The "Commencement Date" shall be the first day after
this Agreement becomes effective in accordance with Article II hereof.
      3.2 Occupancy. Unless there are unusual circumstances, SWBT will notify
the Interconnector 



<PAGE>   180


                                      -4-

that the Premises is ready for occupancy within ____ days after receipt of the
payments due under Sections 4.4. The Interconnector must place operational
telecommunications equipment in the Premises and connect with SWBT's network
within sixty (60) days after receipt of such notice; provided, however, that
such 60-day period shall not begin until regulatory approval is obtained under
Article II. If the Interconnector fails to do so, this Agreement is terminated
except that the Interconnector shall be liable in an amount equal to the unpaid
balance of the charges due under and, further, shall continue to be bound by
Articles II, IV, XI, XIV, XV, XVII, XVIII, XX, XXI, XXVI and XXVII hereof. For
purposes of this Section, the Interconnector's telecommunications equipment is
considered to be operational and interconnected when connected to SWBT's network
for the purpose of providing service.

                          ARTICLE IV - PREMISES CHARGES

      4.1 Monthly Charges. Beginning on the Commencement Date, Interconnector
shall pay to SWBT a charge of _______ Dollars ($______) per month for use of 
the Premises. The monthly charge may be increased upon thirty (30)
days' notice by SWBT.
      4.2 Billing. Billing shall occur on or about the 25th day of each month,
with payment due thirty (30) days from the bill date. SWBT may change its
billing date practices upon thirty (30) days notice to the Interconnector.
      4.3 Preparation Charge. (a) The one-time charge for preparing the Premises
for use by the Interconnector is estimated to be __________________ Dollars
($XXX.XX) ("Preparation Charge"), which consists of two components: (i) the
charge to the Interconnector associated with modifying the Building to provide
physical collocation ("Common Charge"), and (ii) the charge associated with
preparing the Premises ("Premises Charge"). Of the Preparation Charge
___________ Dollars ($XXX.XX) is the estimate for subcontractor charges
("Subcontractor Charges").
      (b) SWBT will contract for and perform the construction and preparation
activities underlying the 




<PAGE>   181

                                      -5-

Preparation Charge, including the Common Charge, the Premises Charge, and the
Subcontractor Charges, and any Custom Work charges, using same or consistent
practices that are used by SWBT for other construction and preparation work
performed in the Building. Subject to an appropriate non-disclosure agreement,
SWBT will permit the Interconnector to inspect supporting documents for the
Preparation Charge, including the Common Charge (if the Interconnector is the
initial physical collocator as used in Section 4.5(b)) and the Premises Charge,
and any Custom Work charge. Any dispute regarding such SWBT charges will be
subject to the dispute resolution provisions hereof.
      4.4 Payment of Premises Charge. Prior to any obligation on SWBT to start
any preparation of the Premises, the Interconnector shall pay SWBT fifty percent
(50%) of the Premises Charge and eighty-five percent (85%) of any custom work
charge required to create or vacate any entrance facility for the Interconnector
("Custom Work"), and shall be due no later than ten (10) business days after the
Agreement has become effective in accordance with Article II hereof. The
remainder of the Premises Charge and any Custom Work charge are due upon
completion and prior to occupancy by the Interconnector.
      4.5 Payment of Common Charge. (a) In addition and prior to any obligation
on SWBT to start any preparation of the Building for physical collocation, the
Interconnector shall pay SWBT fifty percent (50%) of the Common Charge. The
other fifty percent (50%) of the Common Charge is due upon completion and prior
to occupancy by the Interconnector.
      (b) The first entity to which SWBT provides physical collocation in the
Building shall be responsible for all costs incurred by SWBT associated with the
preparation of the Building to provide physical collocation in the initial space
where physical collocation is to be located ("Initial Common Charge").
Thereafter the Initial Common Charge will be prorated and the prorated share
refunded to the previous physical collocator(s) as additional entities use
physical collocation in the Building within twelve (12) months of the first
billing date of the initial monthly charge for the first physical collocator in
the Building, using the following schedule:


<PAGE>   182

                                      -6-

<TABLE>
<CAPTION>


Collocator                 Initial Common Charge              Refund
- ----------                 ---------------------              ------
<S>                               <C>                        <C>          
   1st                            100%                         NA
   2nd                             50%                         50%
   3rd                             33 1/3%                     16 2/3%
   4th                             25%                          8 1/3%
   5th and beyond                   0%                          0%

</TABLE>

To the extent that a physical collocator uses a space other than such initial
space, SWBT shall refund to the Interconnector the portion of the Initial Common
Charge applicable to such collocator based on the relative use of such initial
space in a manner consistent with the above methodology and other terms of this
Agreement.
      (c) No interest will be paid on refunds. Refunds shall be based on the
Initial Common Charge actually paid by the first physical collocator.
      (d) Notwithstanding the above, SWBT shall have no obligation to remit any
amount that would result in SWBT being unable to retain the full amount of the
Initial Common Charge or to remit any amount based upon charges not actually
collected.
      4.6 Payment of Preparation Charge. SWBT is not obligated to start any
preparation of the Premises until the Interconnector pays SWBT fifty percent
(50%) of the Preparation Charge and eighty-five percent (85%) of the charges for
any Custom Work charge. Such charges shall be due no later than ten (10)
business days after the Agreement has become effective in accordance with
Article II hereof. The remainder of the Preparation Charge and any Custom Work
charge are due upon completion and prior to occupancy by the Interconnector.
      4.7 Occupancy Conditioned on Payment. SWBT shall not permit the
Interconnector to have access to the Premises for any purpose other than
inspection until SWBT is in receipt of complete payment of the Preparation
Charge and any Custom Work charges.
      4.8 Subcontractor Charges. Within one hundred twenty (120) days of the
completion date of the Premises, SWBT shall perform a true-up of all
Subcontractor Charges using the actual amounts billed by subcontractors. Any
amounts incurred above the Subcontractor Charges will be billed to the

<PAGE>   183

                                      -7-

Interconnector or, alternatively, any amount below such Charges will be remitted
to the Interconnector.
      4.9 Breach Prior to Commencement Date. In the event that the
Interconnector materially breaches this Agreement by purporting to terminate
this Agreement after SWBT has begun preparation of the Premises but before SWBT
has been paid the entire amounts due under this Article, then in addition to any
other remedies that SWBT might have, the Interconnector shall be liable in the
amount equal to the non-recoverable costs less estimated net salvage.
Non-recoverable costs include the non-recoverable cost of equipment and material
ordered, provided or used; trued-up Subcontractor Charges, the non-recoverable
cost of installation and removal, including the costs of equipment and material
ordered, provided or used; labor; transportation and any other associated costs.
      4.10 Late Payment Charge. In the event that any charge is not paid when
due, the unpaid amounts shall bear interest in accordance with the terms and
conditions set forth in SWBT's intrastate tariff late payment provision(s)
applicable to access services for the State in which the Premises is located, or
the highest rate permitted by law, whichever is lower, from the due date until
paid.

                       ARTICLE V - INTERCONNECTION CHARGES

      5.1 Charges for interconnection shall be as set forth in any
interconnection agreement between SWBT and the interconnector and any applicable
tariffs.

              ARTICLE VI - FIBER OPTIC CABLE AND DEMARCATION POINT

      6.1 Fiber Entrances. The Interconnector shall use a single mode dielectric
fiber optic cable as a transmission medium to the Premises. The Interconnector
shall be permitted no more than two (2) entrance routes into the Building, if
available.
      6.2 Demarcation Point. SWBT shall designate the point(s) of termination
within the Building as the point(s) of physical demarcation between the
Interconnector's network and SWBT's network, with 


<PAGE>   184

                                      -8-

each being responsible for maintenance and other ownership obligations and
responsibilities on its side of that demarcation point. SWBT anticipates that
the demarcation point will be within the point-of-termination frame.

                          ARTICLE VII - USE OF PREMISES

      7.1 Nature of Use. The Premises are to be used by the Interconnector for
purposes of locating equipment and facilities within SWBT's central offices to
connect with SWBT services only. Consistent with the nature of the Building and
the environment of the Premises, the Interconnector shall not use the Premises
for office, retail, or sales purposes. No signage or markings of any kind by the
Interconnector shall be permitted on the Building or on the grounds surrounding
the Building.
      7.2 Equipment List. A list of all of the Interconnector's equipment and
facilities that will be placed within the Premises is set forth on Exhibit ___,
attached and incorporated herein, with the associated power requirements, floor
loading, and heat release of each piece. The Interconnector warrants and
represents that Exhibit __ is a complete and accurate list, and acknowledges
that any incompleteness or inaccuracy would be a material breach of this
Agreement. The Interconnector shall not place or leave any equipment or
facilities within the Premises beyond those listed on Exhibit ___ without the
express written consent of SWBT.
      7.2.1 Subsequent Requests to Place Equipment. In the event that subsequent
to the execution of this Agreement the Interconnector desires to place in the
Premises any equipment or facilities not set forth on Exhibit ___, the
Interconnector shall furnish to SWBT a written list and description thereof
substantially in the form of Attachment A, which is attached and incorporated.
Thereafter, in its sole discretion, SWBT may provide such written consent or may
condition any such consent on additional charges arising from the request,
including any engineering design charges and any additional requirements such as
power and environmental requirements for such listed and described equipment
and/or facilities. Upon the execution by both parties of a final list and
description, including any 


<PAGE>   185


                                      -9-

applicable charges, this Agreement shall be deemed to have been amended to
include the terms and conditions of the final list and description.
      7.2.2 Limitations. The foregoing imposes no obligation upon SWBT to
purchase additional plant or equipment, relinquish used or forecasted space or
facilities, or to undertake the construction of new quarters or to construct
additions to existing quarters in order to satisfy a subsequent request for
additional space or the placement of additional equipment or facilities.
      7.3 Administrative Uses. The Interconnector may use the Premises for
placement of equipment and facilities only. The Interconnector's employees,
agents and contractors shall be permitted access to the Premises at all
reasonable times, provided that the Interconnector's employees, agents and
contractors comply with SWBT's policies and practices pertaining to fire, safety
and security. The Interconnector agrees to comply promptly with all laws,
ordinances and regulations affecting the use of the Premises. Upon the
expiration of the Agreement, the Interconnector shall surrender the Premises to
SWBT, in the same condition as when first occupied by the Interconnector,
ordinary wear and tear excepted.
      7.4 Threat to Network or Facilities. Interconnector equipment or operating
practices representing a significant demonstrable technical threat to SWBT's
network or facilities, including the Building, are strictly prohibited.
      7.5 Interference or Impairment. Notwithstanding any other provision
hereof, the characteristics and methods of operation of any equipment or
facilities placed in the Premises shall not interfere with or impair service
over any facilities of SWBT or the facilities of any other person or entity
located in the Building; create hazards for or cause damage to those facilities,
the Premises, or the Building; impair the privacy of any communications carried
in, from, or through the Building; or create hazards or cause physical harm to
any individual or the public. Any of the foregoing events would be a material
breach of this Agreement.


<PAGE>   186


                                      -10-

      7.6 Interconnection to Other Collocated Interconnectors Within the
Building To the extent that SWBT is required by law to permit such
interconnection, SWBT will provide the connection between physical collocation
arrangements on a time and materials basis whenever the collocated
interconnectors cannot for technical reasons provide the connection for
themselves by passing the facility through the cage wall(s). SWBT will provide
nothing more than the labor and physical structure(s) necessary for the
collocator(s) to pull facilities provided by one collocator from its cage to the
cage of another collocator. If the collocators are not located on the same floor
and cannot physically pull the cable themselves through the SWBT provided
structure(s), SWBT will perform the cable pull on an time and materials basis.
At no time will the collocators be allowed access to any portion of the central
office other than the collocation area. SWBT will not make the physical
connection within the collocator's cage, SWBT will not accept any liability for
the cable or the connections and SWBT will not maintain any records concerning
these connections.
      7.7 Personality and its Removal. Subject to this Article, the
Interconnector may place or install in or on the Premises such fixtures and
equipment as it shall deem desirable for the conduct of business. Personal
property, fixtures and equipment placed by the Interconnector in the Premises
shall not become a part of the Premises, even if nailed, screwed or otherwise
fastened to the Premises, but shall retain their status as personality and may
be removed by Interconnector at any time. Any damage caused to the Premises by
the removal of such property shall be promptly repaired by Interconnector at its
expense.
      7.8 Alterations. In no case shall the Interconnector or any person
purporting to be acting through or on behalf of the Interconnector make any
rearrangement, modification, improvement, addition, repair, or other alteration
to the Premises or the Building without the advance written permission and
direction of SWBT. SWBT shall consider a modification, improvement, addition,
repair, or other alteration requested by the Interconnector, provided that SWBT
shall have the right to reject or modify 


<PAGE>   187

                                      -11-

any such request. The cost of any such construction shall be paid by
Interconnector in accordance with SWBT's then-standard custom work order
process.

                            ARTICLE VIII - STANDARDS

      8.1 Minimum Standards. This Agreement and the physical collocation
provided hereunder is made available subject to and in accordance with the (i)
Bellcore Network Equipment Building System (NEBS) Generic Requirements
(GR-63-CORE and GR-1089-CORE), as may be amended at any time and from time to
time, and any successor documents; (ii) SWBT's Technical Publication for
Physical Collocation dated ________ ___, 1996, as may be amended from time to
time; (iii) SWBT's Technical Publication 76300, Installation Guide, followed in
installing network equipment and facilities within SWBT central offices, as may
be amended from time to time; (iv) SWBT's Emergency Operating Procedures, as may
be amended from time to time; and (v) any statutory and/or regulatory
requirements in effect at the execution of this Agreement or that subsequently
become effective and then when effective. The Interconnector shall strictly
observe and abide by each.
      8.2 Revisions. Any revision to SWBT's Technical Publication for Physical
Collocation, its Technical Publication 76300, or its Emergency Operating
Procedures shall become effective and thereafter applicable under this Agreement
thirty (30) days after such revision is released by SWBT; provided, however,
that any revision made to address situations potentially harmful to SWBT's
network or the Premises, or to comply with statutory and/or regulatory
requirements shall become effective immediately.
      8.3 Compliance Certification. The Interconnector warrants and represents
compliance with the Bellcore Network Equipment Building System (NEBS) Generic
Requirements (GR-63-CORE and GR-1089-CORE) for each item set forth on Exhibit
___. The Interconnector also warrants and represents that any equipment or
facilities that may be placed in the Premises pursuant to Section 7.2.1 or
otherwise shall be so compliant. DISCLOSURE OF ANY NON-COMPLIANT ITEM ON 


<PAGE>   188

                                      -12-

EXHIBIT __, PURSUANT TO SECTION 7.2.1, OR OTHERWISE SHALL NOT QUALIFY THIS
ABSOLUTE CERTIFICATION IN ANY MANNER.

               ARTICLE IX - RESPONSIBILITIES OF THE INTERCONNECTOR

         9.1 Contact Number. The Interconnector is responsible for providing to
SWBT personnel a contact number for Interconnector technical personnel who are
readily accessible 24 hours a day, 7 days a week.
         9.2 Trouble Status Reports. The Interconnector is responsible for
providing trouble report status when requested by SWBT.
         9.3 Optical Fiber Extension. The Interconnector is responsible for
bringing its fiber optic cable to the wire center entrance manhole(s) designated
by SWBT, and for leaving sufficient cable length in order for SWBT to fully
extend the Interconnector-provided cable through the cable vault to the
Premises.
         9.4 Regeneration. Regeneration of either DS1 or DS3 signal levels may
be provided by the Interconnector, or SWBT under its then-standard custom work  
order process, including payment requirements prior to the installation of the
regeneration equipment.
         9.5 Removal. The Interconnector is responsible for removing any 
equipment, property or other items that it brings into the Premises or any
other part of the Building. If the Interconnector fails to remove any
equipment, property, or other items from the Premises within thirty (30) days
after discontinuance of use, SWBT may perform the removal and shall charge the
Interconnector for any materials used in any such removal, and the time spent
on such removal at the then-applicable hourly rate for custom work. Further, in
addition to the other provisions herein, the Interconnector shall indemnify and
hold SWBT harmless from any and all claims, expenses, fees, or other costs
associated with any such removal by SWBT.



<PAGE>   189

                                      -13-

      9.6 Interconnector's Equipment and Facilities. The Interconnector is
solely responsible for the design, engineering, testing, performance, and
maintenance of the equipment and facilities used by the Interconnector in the
Premises. The Interconnector will be responsible for servicing, supplying,
repairing, installing and maintaining the following facilities within the
Premises:
      (a) its fiber optic cable(s);
      (b) its equipment;
      (c) required point of termination cross connects;
      (d) point of termination maintenance, including replacement of fuses and
circuit breaker restoration, if and as required; and
      (e) the connection cable and associated equipment which may be required
within the Premises to the point(s) of termination. 

SWBT NEITHER ACCEPTS NOR ASSUMES ANY RESPONSIBILITY WHATSOEVER IN ANY OF THESE
AREAS.

      9.7 Verbal Notifications Required. The Interconnector is responsible for
immediate verbal notification to SWBT of significant outages or operations
problems which could impact or degrade SWBT's network, switches, or services,
and for providing an estimated clearing time for restoral. In addition, written
notification must be provided within twenty-four (24) hours.
      9.8 Service Coordination. The Interconnector is responsible for
coordinating with SWBT to ensure that services are installed in accordance with
the service request.
      9.9 Testing. The Interconnector is responsible for testing, to identify
and clear a trouble when the trouble has been isolated to an
Interconnector-provided facility or piece of equipment. If SWBT testing is also
required, it will be provided at charges specified in SWBT's F.C.C. No. 73,
Section 13.

                           ARTICLE X - QUIET ENJOYMENT

      Subject to the other provisions hereof, SWBT covenants that it has full
right and authority to 

<PAGE>   190


                                      -14-

permit the use of the Premises by the Interconnector and that, so long as the
Interconnector performs all of its obligations herein, the Interconnector may
peaceably and quietly enjoy the Premises during the term hereof.

                             ARTICLE XI - ASSIGNMENT

      The Interconnector shall not assign or otherwise transfer this Agreement,
neither in whole nor in part, or permit the use of any part of the Premises by
any other person or entity, without the prior written consent of SWBT. Any
purported assignment or transfer made without such consent shall be voidable at
the option of SWBT. The Interconnector shall not permit any third party to
jointly occupy the Premises.

                           ARTICLE XII - CASUALTY LOSS

         12.1 Damage to Premises. If the Premises are damaged by fire or other
casualty, and

         (i)    The Premises are not rendered untenantable in whole or in part,
                SWBT shall repair the same at its expense (as hereafter limited)
                and the rent shall not be abated, or
         (ii)   The Premises are rendered untenantable in whole or in part and
                such damage or destruction can be repaired within
                ninety (90) days, SWBT has the option to repair the Premises at
                its expense (as hereafter limited) and rent shall be
                proportionately abated while Interconnector was deprived of the
                use. If the Premises cannot be repaired within ninety (90)
                days, or SWBT opts not to rebuild, then this Agreement shall
                (upon notice to the Interconnector within thirty (30) days
                following such occurrence) terminate as of the date of such
                damage.
Any obligation on the part of SWBT to repair the Premises shall be limited to
repairing, restoring and rebuilding the Premises as originally prepared for the
Interconnector and shall not include any obligation to repair, restore, rebuild
or replace any alterations or improvements made by the 

<PAGE>   191


                                      -15-

Interconnector or by SWBT on request of the Interconnector; or any fixture or
other equipment installed in the Premises by the Interconnector or by SWBT on
request of the Interconnector.
      12.2. Damage to Building. In the event that the Building shall be so
damaged by fire or other casualty that closing, demolition or substantial
alteration or reconstruction thereof shall, in SWBT's opinion, be advisable,
then, notwithstanding that the Premises may be unaffected thereby, SWBT, at its
option, may terminate this Agreement by giving the Interconnector ten (10) days
prior written notice within thirty (30) days following the date of such
occurrence, if at all possible.

                             ARTICLE XIII - RE-ENTRY

      If the Interconnector shall default in performance of any agreement
herein, and the default shall continue for thirty (30) days after receipt of
written notice, or if the Interconnector is declared bankrupt or insolvent or
makes an assignment for the benefit of creditors, SWBT may, immediately or at
any time thereafter, without notice or demand, enter and repossess the Premises,
expel the Interconnector and any claiming under the Interconnector, remove the
Interconnector's property, forcibly if necessary, and thereupon this Agreement
shall terminate, without prejudice to any other remedies SWBT might have.
      SWBT may also refuse additional applications for service and/or refuse to
complete any pending orders for additional space or service by the
Interconnector at any time thereafter.

                      ARTICLE XIV - LIMITATION OF LIABILITY

      14.1 Limitation. With respect to any claim or suit for damages arising in
connection with the mistakes, omissions, interruptions, delays or errors, or
defects in transmission occurring in the course of furnishing service hereunder,
the liability of SWBT, if any, shall not exceed an amount equivalent to the
proportionate monthly charge to the Interconnector for the period during which
such mistake, omission, interruption, delay, error, or defect in transmission or
service occurs and continues. 


<PAGE>   192

                                      -16-

However, any such mistakes, omissions, interruptions, delays, errors, or defects
in transmission or service which are caused or contributed to by the negligence
or willful act of the Interconnector or which arise in connection with the use
of the Interconnector-provided facilities or equipment shall not result in the
imposition of any liability whatsoever upon SWBT.
      Neither party shall be responsible to the other for any indirect, special,
consequential, lost profit, or punitive damages, whether in contract or tort.
      Each party shall be indemnified and held harmless by the other against
claims and damages by any third party arising from provision of the other
party's services or equipment except those claims and damages directly
associated with the provision of services to the other party which are governed
by the provisioning party's applicable tariffs.
      Neither party shall have any liability whatsoever to the customers of the
other party for claims arising from the provision of the other party's service
to its customers, including claims for interruption of service, quality of
service or billing disputes.
      The liability of either party for its willful misconduct, if any, is not
limited by this Agreement. With respect to any other claim or suit, by a
customer or by any others, for damages associated with the installation,
provision, preemption, termination, maintenance, repair or restoration of
service, SWBT's liability, if any, shall not exceed an amount equal to the
proportionate monthly charge for the affected period.
      SWBT shall not be liable for any act or omission of any other carrier or
customer providing a portion of a service, nor shall SWBT for its own act or
omission hold liable any other carrier or customer providing a portion of a
service.
      When the Interconnector is provided service under this Agreement, SWBT
shall be indemnified, defended and held harmless by the Interconnector against
any claim, loss or damage arising from the customer's use of services offered
under this Agreement, involving:
      (1)     Claims for libel, slander, invasion of privacy, or infringement of
              copyright arising from 

<PAGE>   193


                                     -17-

              the customer's own communications;
      (2)     Claims for patent infringement arising from the customer's acts
              combining or using the service furnished by SWBT in connection
              with facilities or equipment furnished by the customer; or
      (3)     All other claims arising in connection with any act or omission of
              the Interconnector in the course of using services provided
              pursuant to this Agreement.
      14.2 Third Parties. The Interconnector acknowledges and understands that
SWBT may provide space in or access to the Building to other persons or entities
("Others"), which may include competitors of Interconnectors; that such space
may be close to the Premises, possibly including space adjacent to the Premises
and/or with access to the outside of the Premises; and that the cage around the
Premises is a permeable boundary that will not prevent the Others from observing
or even damaging the Interconnector's equipment and facilities. In addition to
any other applicable limitation, SWBT shall have absolutely no liability with
respect to any action or omission by any Other, regardless of the degree of
culpability of any such Other or SWBT, and regardless of whether any claimed
SWBT liability arises in tort or in contract. The Interconnector shall save and
hold SWBT harmless from any and all costs, expenses, and claims associated with
any such acts or omission by any Other acting for, through, or as a result of
the Interconnector.

                      ARTICLE XV - INDEMNIFICATION OF SWBT

      In addition to any other provision hereof, the Interconnector agrees to
indemnify, defend and save harmless SWBT (including its officers, directors,
employees, and other agents) from any and all claims, liabilities, losses,
damages, fines, penalties, costs, attorney's fees or other expenses of any kind,
arising in connection with Interconnector's use of the Premises, conduct of its
business or any activity, in or about the Premises, performance of any terms of
this Agreement, or any act or omission of the Interconnector (including its
officers, directors, employees, agents, contractors, servants, 



<PAGE>   194

                                      -18-

invitees, or licensees). Defense of any claim shall be reasonably satisfactory
to SWBT.

          ARTICLE XVI - SERVICES, UTILITIES, MAINTENANCE AND FACILITIES

      16.1 Operating Services. SWBT, at its sole cost and expense, shall
maintain for the Building customary building services, utilities (excluding
telephone facilities), including janitor and elevator services, 24 hours a day.
The Interconnector shall be permitted to have a single-line business telephone
service for the Premises subject to applicable SWBT tariffs.
      16.2 Utilities. SWBT will provide negative DC and AC power, back-up power,
heat, air conditioning and other environmental support necessary for the
Interconnector's equipment, in the same manner that it provides such support
items for its own equipment within that wire center.
      16.3 Maintenance. SWBT shall maintain the exterior of the Building and
grounds, and all entrances, stairways, passageways, and exits used by the
Interconnector to access the Premises.
      16.4 Legal Requirements. SWBT agrees to make, at its expense, all changes
and additions to the Premises required by laws, ordinances, orders or
regulations of any municipality, county, state or other public authority
including the furnishing of required sanitary facilities and fire protection
facilities, except fire protection facilities specially required because of the
installation of telephone or electronic equipment and fixtures in the Premises.

            ARTICLE XVII - LIMITATION OF ACTIONS; DISPUTE RESOLUTION

      17.1 Finality of Disputes. No claim arising from this Agreement shall be
brought more than twenty-four (24) months from the date of occurrence which
gives rise to the claim.
      17.2 Alternative to Litigation. The parties desire to resolve disputes
arising in connection with this Agreement without litigation. Accordingly,
except for action seeking a temporary restraining order or an injunction related
to the purposes of this Agreement, or suit to compel compliance with this
dispute resolution process, the parties agree to use the following alternative
dispute resolution 




<PAGE>   195

                                      -19-

procedure as their sole remedy with respect to any controversy or claim arising
from or relating to this Agreement.
      17.3 Resolution of Disputes Between Parties. At the written request of a
party, each party will appoint a knowledgeable, responsible representative to
meet and negotiate in good faith to resolve any dispute arising under this
Agreement. The location, form, frequency, duration and conclusion of these
discussions shall be left to the discretion of the representatives. Upon
agreement, the representatives may use other alternative dispute resolution
procedures, such as mediation, to assist in the negotiations. Discussions and
correspondence among the representatives for purposes of settlement, exempt from
discovery and production, shall not be admissible in the arbitration described
below or in any lawsuit without the concurrence of all parties. Documents
identified in or provided with such communications, which are not prepared for
purposes of the negotiations, are not so exempted and, if otherwise admissible,
may be admitted in evidence in the arbitration or lawsuit.
      17.4 Arbitration. If the negotiations do not resolve the dispute within
sixty (60) days of the initial written request, the dispute shall be submitted
to binding arbitration by a single arbitrator pursuant to the Commercial
Arbitration Rules of the American Arbitration Association. A Party may demand
such arbitration in accordance with the procedures set forth in those rules.
Discovery shall be controlled by the arbitrator and shall be permitted only to
the extent set forth in this Section. Each party may submit in writing to the
other party, and the receiving party shall so respond, to a maximum of any
combination of thirty-five (35) (none of which may have subparts) of the
following:
      (a)  Interrogatories
      (b)  Demands to produce documents
      (c)  Requests for admission
Additional discovery may be permitted upon mutual agreement of the parties. The
arbitration hearing shall be commenced within sixty (60) days of the demand for
arbitration. The arbitration shall be held in ___________________. The
arbitrator shall control the scheduling so as to process the matter



<PAGE>   196

                                      -20-

expeditiously. The parties shall submit written briefs five days before the
hearing. The arbitrator shall rule on the dispute by issuing a written opinion
within thirty (30) days after the close of hearings. The arbitrator has no
authority to order punitive or consequential damages. The times specified in
this section may be extended upon mutual agreement of the parties or by the
arbitrator upon a showing of good cause. Judgment upon the award rendered by the
arbitrator may be entered in any court having jurisdiction.
      17.5 Costs. Each party shall bear its own costs of these procedures. A
party seeking discovery shall reimburse the responding party the costs of
production of documents (including search time and reproduction costs). The
parties shall equally split the fees of the arbitration and the arbitrator.

                        ARTICLE XVIII - SUCCESSORS BOUND

      Without limiting Article XI hereof, the conditions and agreements
contained herein shall bind and inure to the benefit of SWBT, the Interconnector
and their respective successors and, except as otherwise provided herein,
assigns.

                       ARTICLE XIX - CONFLICT OF INTEREST

      The Interconnector represents that no employee or agent of SWBT has been
or will be employed, retained, paid a fee, or otherwise has received or will
receive any personal compensation or consideration from the Interconnector, or
any of the Interconnector's employees or agents in connection with the arranging
or negotiation of this Agreement or associated documents.

                       ARTICLE XX - NON-EXCLUSIVE REMEDIES

      No remedy herein conferred upon is intended to be exclusive of any other
remedy in equity, provided by law, or otherwise, but each shall be in addition
to every other such remedy.


<PAGE>   197


                                      -21-

                              ARTICLE XXI - NOTICES

      Except as may be specifically permitted in this Agreement, any notice,
demand, or payment required or desired to be given by one party to the other
shall be in writing and shall be valid and sufficient if dispatched by
registered or certified mail, return receipt requested, postage prepaid, in the
United States mails, or by facsimile transmission; provided, however, that
notices sent by such registered or certified mail shall be effective on the
third business day after mailing and those sent by facsimile transmission shall
only be effective on the date transmitted if such notice is also sent by such
registered or certified mail no later than the next business day after
transmission, all addressed as follows:

If to SWBT:

      Jeffrey Fields
      One Bell Plaza, 525.07
      Dallas, Texas 75202

If to the Interconnector:

      Richard Weinstein
      11111 Dorsett Road
      St. Louis, Missouri 63043

Either party hereto may change its address by written notice given to the other
party hereto in the manner set forth above.

                       ARTICLE XXII - COMPLIANCE WITH LAWS

      The Interconnector and all persons acting through or on behalf of the
Interconnector shall comply with the provisions of the Fair Labor Standards Act,
the Occupational Safety and Health Act, and all other applicable federal, state,
county, and local laws, ordinances, regulations and codes (including



<PAGE>   198

                                      -22-

identification and procurement of required permits, certificates, approvals and
inspections) in its performance hereunder. The Interconnector further agrees
during the term of this Agreement to comply with all applicable Executive and
Federal regulations as set forth in SW9368, attached as Exhibit ____ and
incorporated herein, as may be modified from time to time.

                         ARTICLE XXIII - OSHA STATEMENT

      The Interconnector, in recognition of SWBT's status as an employer, agrees
to abide by and to undertake the duty of compliance on behalf of SWBT with all
federal, state and local laws, safety and health regulations relating to the
Premises which the Interconnector has assumed the duty to maintain pursuant to
this Agreement, and to indemnify and hold SWBT harmless for any judgments,
citations, fines, or other penalties which are assessed against SWBT as the
result of the Interconnector's failure to comply with any of the foregoing.
SWBT, in its status as an employer, shall comply with all federal, state and
local laws, safety and health standards and regulations with respect to the
structural and those other portions of the Premises which SWBT has agreed to
maintain pursuant hereto.

                            ARTICLE XXIV - INSURANCE

      24.1 Coverage Requirements. The Interconnector shall, at its sole cost and
expense procure, maintain, pay for and keep in force the following insurance
coverage and any additional insurance and/or bonds required by law and
underwritten by insurance companies having a BEST Insurance rating of A+VII or
better, and which is authorized to do business in the jurisdiction in which the
Premises are located. SWBT shall be named as an ADDITIONAL INSURED on general
liability policy.
      (1)      Comprehensive General Liability insurance including
               Products/Completed Operations Liability insurance including the
               Broad Form Comprehensive General Liability endorsement (or its
               equivalent(s)) with a Combined Single limit for Bodily Injury and


<PAGE>   199


                                      -23-

               Property Damage of $1,000,000. Said coverage shall include the
               contractual, independent contractors products/completed
               operations, broad form property, personal injury and fire legal
               liability.
      (2)      If use of an automobile is required or if the Interconnector is
               provided or otherwise allowed parking space by SWBT in connection
               with this Agreement, automobile liability insurance with minimum
               limits of $1 million each accident for Bodily Injury, Death and
               Property Damage combine. Coverage shall extend to all owned,
               hired and non-owned automobiles. The Interconnector hereby waives
               any rights of recovery against SWBT for damage to the
               Interconnector's vehicles while on the grounds of the Building
               and the Interconnector will hold SWBT harmless and indemnify it
               with respect to any such damage or damage to vehicles of the
               Interconnector's employees, contractors, invitees, licensees or
               agents.
      (3)      Workers' Compensation insurance with benefits afforded in
               accordance with the laws of the state in which the space is to be
               provided.
      (4)      Employer's Liability insurance with minimum limits of $100,000
               for bodily injury by accident, $100,000 for bodily injury by
               disease per employee and $500,000 for bodily injury by disease
               policy aggregate.
      (5)      Umbrella/Excess liability coverage in an amount of $5 million
               excess of coverage specified above.
      (6)      All Risk Property coverage on a full replacement cost basis
               insuring all of the Interconnector's personal property situated
               on or within the Building or the Premises. The Interconnector
               releases SWBT from and waives any and all right of recovery,
               claim, action or cause of action against SWBT, its agents,
               directors, officers, employees, independent contractors, and
               other representatives for any loss or damage that may occur to
               equipment or any other personal property belonging to
               Interconnector or located on or in the space at



<PAGE>   200


                                      -24-

               the instance of the Interconnector by reason of fire or water or
               the elements or any other risks would customarily be included in
               a standard all risk casualty insurance policy covering such
               property, regardless of cause or origin, including negligence of
               SWBT, its agents, directors, officers, employees, independent
               contractors, and other representatives. Property insurance on the
               Interconnector's fixtures and other personal property shall
               contain a waiver of subrogation against SWBT, and any rights of
               the Interconnector against SWBT for damage to the
               Interconnector's fixtures or personal property are hereby waived.
The Interconnector may also elect to purchase business interruption and
contingent business interruption insurance, knowing that SWBT has no liability
for loss of profit or revenues should an interruption of service occur.
      24.2 Coverage Increases. The limits set forth in Section 24.1 may be
increased by SWBT from time to time during the term of occupancy to at least
such minimum limits as shall then be customary in respect of comparable
situations within the existing SWBT buildings.
      24.3 Primary Coverage. All policies purchased by the Interconnector shall
be deemed to be primary and not contributing to or in excess of any similar
coverage purchased by SWBT.
      24.4 Effective Date. All insurance must be in effect on or before
occupancy date and shall remain in force as long as any of the Interconnector's
facilities or equipment remain within the Premises or the Building. If the
Interconnector fails to maintain the coverage, SWBT may pay the premiums thereon
and, if so, shall be reimbursed by the Interconnector.
      24.5 Supporting Documentation. The Interconnector shall submit
certificates of insurance and copies of policies reflecting the coverages
specified above prior to the commencement of the work called for in this
Agreement. The Interconnector shall arrange for SWBT to receive thirty (30) days
advance written notice from the Interconnector's insurance company(ies) of
cancellation, non-renewal or substantial alteration of its terms.

<PAGE>   201


                                      -25-

      24.6 Carrier Recommendations. The Interconnector must also conform to the
recommendation(s) made by SWBT's Property Insurance Company which Interconnector
has already agreed to or to such recommendations as it shall hereafter agree to.
      24.7 Material Breach. Failure to comply with the provisions of this
section will be deemed a material violation of this Agreement.

                      ARTICLE XXV - SWBT'S RIGHT OF ACCESS

      SWBT, its agents, employees, and other SWBT-authorized persons shall have
the right to enter the Premises at any reasonable time to examine its condition,
make repairs required to be made by SWBT hereunder, and for any other purpose
deemed reasonable by SWBT. SWBT may access the Premises for purpose of averting
any threat of harm imposed by the Interconnector or its equipment or facilities
upon the operation of SWBT equipment, facilities and/or personnel located
outside of the Premises. If routine inspections are required, they shall be
conducted at a mutually agreeable time.

                  ARTICLE XXVI - PURPOSE AND SCOPE OF AGREEMENT

      Through this Agreement, the Interconnector is placing telecommunications
equipment and facilities on SWBT property for the purpose of connecting with
SWBT's network only. The parties agree that this Agreement does not constitute,
and shall not be asserted to constitute, an admission or waiver or precedent
with any State commission, the Federal Communications Commission, any other
regulatory body, any State or Federal Court, or in any other form that SWBT has
agreed or acquiesced that any piece of Interconnector equipment or facility is
"equipment necessary for interconnection or access to unbundled network
elements" under 47 U.S.C. 251(c)(6).

                          ARTICLE XXVII - MISCELLANEOUS

      27.1 Exhibits The following Exhibits are attached hereto and made part
hereof:
                    Exhibit  
                           --------------


<PAGE>   202


                                      -26-

                Exhibit
                       --------------
                Exhibit 
                       --------------
                Exhibit
                       --------------

      27.2 Variations. In the event of variation or discrepancy between any
duplicate originals hereof, including exhibits, the original Agreement held by
SWBT shall control.
      27.3 Governing Law. This Agreement shall be governed by the laws of the
State in which the Premises are located, without regard to the choice of law
principles thereof.
      27.4 Joint and Several. If Interconnector constitutes more than one
person, partnership, corporation, or other legal entities, the obligation of all
such entities under this Agreement is joint and several.
      27.5 Future Negotiations. SWBT may refuse requests for additional space in
the Building or in any other SWBT premises if the Interconnector is in material
breach of this Agreement, including having any past due charges hereunder. In
any and each such event, the Interconnector hereby releases and shall hold SWBT
harmless under Article XV from any duty to negotiate with the Interconnector or
any of its affiliates for any additional space or physical collocation.
      27.6 Severability. With the exception of the requirements, obligations,
and rights set forth in Article II hereof, if any of the provisions hereof are
otherwise deemed invalid, such invalidity shall not invalidate the entire
Agreement, but rather the entire Agreement shall be construed as if not
containing the particular invalid provision(s), and the rights and obligations
of SWBT and the Interconnector shall be construed accordingly.
      27.7 Paragraph Headings and Article Numbers. The headings of the articles
and paragraphs herein are inserted for convenience only and are not intended to
affect the meaning or interpretation of this Agreement.
      27.8 Entire Agreement. This Agreement with the attached schedules and
exhibits, and referenced documentation and materials attached hereto set forth
the entire understanding of the parties and 


<PAGE>   203




                                      -27-

supersedes all prior agreements, arrangements and understandings relating to
this subject matter and may not be changed except in writing by the parties;
provided, however, that this provision shall not affect current or pending
tariffs, under investigation or otherwise, including any charges due thereunder.
No representation, promise, inducement or statement of intention has been made
by either party which is not embodied herein, and there are no other oral or
written understandings or agreements between the parties relating to the subject
matter hereof except as may be referenced herein.
      27.9 No Third Party Beneficiaries. Nothing in this Agreement is intended,
nor shall be deemed, to confer any rights or remedies upon any person or legal
entity not a party hereto.
      27.10 Construction. This Agreement shall be interpreted and governed
without regard to which party drafted this Agreement. 
      27.11 Multiple Originals. This Agreement may be executed in multiple 
copies, each of which shall be deemed an original. 
      27.12 Wavier of Obligations. (a) Whenever this Agreement requires the
consent  of a party, any request for such consent shall be in writing.
      (b) Neither party shall be deemed to have waived or impaired any right,
authority, or option reserved by this Agreement (including the right to demand
exact compliance with every term, condition and covenant herein, or to declare
any breach hereof to be a default and to terminate this Agreement prior to the
expiration of its term), by virtue of any custom or practice of the parties at
variance with the terms hereof or any failure, refusal or neglect to exercise
any right under this Agreement or to insist upon exact compliance by the other
with its obligations hereunder, including any rule or procedure, or any waiver,
forbearance, delay, failure or omission by SWBT to exercise any right, power or
option, whether of the same, similar or different nature, with respect to one or
more other interconnectors.
      27.13 Rights Cumulative. The rights of a party hereunder are cumulative
and no exercise or 

<PAGE>   204


                                      -28-

enforcement by such party of any right or remedy hereunder shall preclude the
exercise or enforcement of any other right or remedy hereunder or to which such
party is entitled to enforce.
      27.14  Binding Effect. (a)  This Agreement is binding upon the parties 
hereto, their respective executors, administrators, heirs, assigns and 
successors in interest.

<PAGE>   205

                                      -29-

      (b) All obligations by either party which expressly or by their nature
survive the expiration or termination of this Agreement shall continue in full
force and effect subsequent to and notwithstanding its expiration or termination
and until they are satisfied in full or by their nature.
      27.15 Impossibility of Performance. Neither party shall be liable for loss
or damage or deemed to be in breach of this Agreement if its failure to perform
its obligations results from: (a) compliance with any law, ruling, order,
regulation, requirement or instruction of any federal, state or municipal
government or any department or agency thereof or court of competent
jurisdiction; (b) acts of God; (c) acts of omissions of the other party; (d)
fires, strikes, labor difficulties, embargoes, war, insurrection or riot; or any
other intervening act beyond the reasonable control of the party claiming such a
delay. Any delay resulting from any of said causes shall extend performance
accordingly or excuse performance, in whole or in part, as may be reasonable. In
any such event, the Interconnector's employees, authorized agents and
contractors will comply with the Emergency Operating Procedures established by
SWBT.
      27.16 Survival. The terms, provisions, representations, and warranties
contained in this Agreement that by their nature and/or context are intended to
survive the performance thereof by either or both parties hereunder shall so
survive the completion of performances and termination of this Agreement,
including the making of any and all payments due hereunder.
      IN WITNESS WHEREOF, the duly authorized representatives of the parties
have executed and delivered this Agreement as of the day and year first above
written.



<PAGE>   206


                                      -30-

      THIS AGREEMENT CONTAINS A BINDING ARBITRATION AGREEMENT.

SOUTHWESTERN BELL TELEPHONE COMPANY




By:
   ---------------------------------------
Title:
      ------------------------------------

DIGITAL TELEPORT, INC.


By:
   ---------------------------------------
Title:
      ------------------------------------



<PAGE>   207


                                      -31-

                                  ATTACHMENT A



Southwestern Bell Telephone Company
[ADDRESS AND TO THE ATTENTION OF PER NOTICE PROVISION]

Re:  [REFERENCE IDENTIFIER ON COVER SHEET]

      Pursuant to the referenced Physical Collocation Agreement ("Agreement"),
this letter constitutes a request to place the following additional equipment
and/or facilities in the Premises:

      Generic Name    # of Bays   Floor Loading   Power Req.    Heat Release
      ------------    ---------   -------------   ----------    ------------

      If this request is acceptable to Southwestern Bell Telephone Company
("SWBT"), please indicate that acceptance by executing both originals and
returning one to the undersigned. With the return of an executed original, the
Agreement shall be deemed amended to reflect that the listed equipment and
facilities may be located in the Premises. In all other respects, the Agreement
shall be unaffected.

      If not acceptable, please let me know of SWBT's objections or conditions
to its acceptance.

      All capitalized terms not defined in this letter but defined in the
Agreement shall have the meaning ascribed to such term in the Agreement.


                                     DIGITAL TELEPORT, INC.


                                     By:
                                        --------------------------------
                                     Title:                             
                                           -----------------------------
                                     Name:
                                          ------------------------------

AGREED AND ACCEPTED:

SOUTHWESTERN BELL TELEPHONE
   COMPANY


 By:
   ---------------------------------------
Title:
      ------------------------------------
Name:                             
      ------------------------------------ 
Date:                                      
     -------------------------------------



<PAGE>   208
                                                                    APPENDIX SS7
                                                                    Page 2 of 12

                                  APPENDIX SS7


                          APPENDIX FOR THE PROVISION OF
                                   SS7 SERVICE

This Appendix sets forth the terms and conditions under which SWBT shall provide
to LSP certain Common Channel Signaling/Signaling System 7 (CCS/SS7) services,
herein referred to as "SS7 Service".

This Appendix provides for the use of the SWBT Common Channel Signaling network,
which uses the Signaling System 7 (SS7) protocol, and for a Dedicated Signaling
Link, which provides network interconnection to SWBT's Signal Transfer Point
(STPs), including facilities. SS7 Service provides CCS/SS7 functionality and
translations to support SS7 based services and applications as they become
available and as facilities permit.

SS7 Service includes the screening of messages based on origination signaling
point code and the routing of messages by a SWBT mated pair of STPs. Any
services beyond SS7 Transport, Use of the STP or a Dedicated Signaling Link
interconnection (e.g. Local and IntraLATA Call Set-Up Signaling, Interexchange
Carrier (IXC) Call Set-Up Signaling, Easy OptionsSM, 800 Data Base Access, and
Line Information Data Base (LIDB) Validation Service Access) will be provided by
an amendment to this appendix, by a separate agreement, or by tariff, whichever
is applicable. Arrangements for services should be made through the LSP Service
Center of SWBT.


I.       SERVICE DESCRIPTION

         A.       SS7 TRANSPORT

                  SS7 Transport provides for the routing and screening of SS7
                  messages from a SWBT pair of STPs (i.e. a mated pair) to
                  another SWBT pair of STPs. The screening of messages provides
                  for LSP designation of signaling points associated with the
                  LSP and controls which messages may be allowed or not allowed
                  by the SWBT STP pairs. The routing of messages provides for
                  the transfer of a complete message between signaling links,
                  and for a Global Title Translation of the message address, if
                  needed.

                 SS7 Transport provides routing of messages for all parts of the
                 SS7 protocol including, for example, Message Transfer Part
                 (MTP) messages, Integrated Services Digital Network User Part
                 (ISDNUP or ISUP) messages, Signaling Connection and Control
                 Part (SCCP) messages, Transaction Capability


<PAGE>   209
                                                                    APPENDIX SS7
                                                                    Page 3 of 12



                 Application Part (TCAP) messages and Operations and Maintenance
                 Application Part (OMAP) messages.

                 SS7 Transport provides for screening and routing of
                 signaling messages based on the SS7 protocol. These messages
                 may support other applications and services such as, for
                 example, Easy Option[ICON] (referred to as Call Control
                 Option[ICON] or Bellcore CLASS[ICON]) services, Message
                 Waiting services, Toll Free Database services, Line
                 Information Data Base (LIDB) Services, Calling Name (CNAM)
                 Database services, Advanced Intelligent Network (AIN) services
                 and Telecommunications Industry Association Interim
                 Standard-41 (IS-41) services. SS7 Transport will route
                 messages to the global title address or to the signaling point
                 code address of the message based on the translation
                 information of SWBT's STP.

                 SS7 Transport provides screening and routing of messages that
                 are generated by the action of the LSP signaling point, or
                 messages that are generated by a signaling point connected via
                 the LSP signaling point.

         B.      DEDICATED SIGNALING LINKS

                 Dedicated Signaling Links provide physical access to SWBT's
                 signaling network. The links are fully dedicated to the use of
                 LSP and provide the screening and routing usage for the SWBT
                 STP to which the link is connected. Dedicated signaling links
                 are provided as a set of links connecting to a SWBT mated pair
                 of STPs. Dedicated Signaling Links are dedicated two-way
                 digital data circuits that interconnect SWBT's STP locations
                 and the LSP's Signaling Points at Signaling Point of Interface
                 (SPOI) locations. Dedicated Signaling Links are available to
                 LSPs for their use in furnishing SS7-based services or
                 applications to their end users or other users of SS7 signaling
                 information.

                 Dedicated Signaling Links include the following elements:

             1.  SS7 Link Cross Connect: The SS7 Link Cross Connect provides a
                 DS-0A or DS1 connection and access point for testing in the
                 SWBT STP building. The cross connect connects the STP Port
                 Termination to an LSP unbundled dedicated transport or to a
                 collocation cage.

             2.  STP Port Termination: The STP Port Termination is the physical
                 termination of the signaling link (i.e. 56 kbps circuit) at a
                 SWBT STP. An STP Port Termination is used for each 56 kbps SS7
                 Link Cross Connect terminated at a SWBT STP.

                 The STP Port Termination shall provide for the use of the SWBT
                 STP to which the port is connected.


<PAGE>   210
                                                                    APPENDIX SS7
                                                                    Page 4 of 12


                 The LSP shall provide the portion of the signaling link from
                 the LSP premises within the LATA to the SWBT STP location using
                 unbundled dedicated transport. LSP shall notify SWBT that the
                 facility contains a signaling link service. Multiple facilities
                 provided by SWBT will be identified so that SWBT may maintain
                 facility diversity between links and linksets that require
                 diversity. LSP shall identify the DS1 or channel of a DS1 that
                 will be used for the signaling link.

                 If LSP does not use an unbundled dedicated transport facility
                 to LSP premises, LSP shall identify that the SS7 Link Cross
                 Connect shall connect to a LSP collocation cage in the SWBT STP
                 building.

                 When LSP uses an alternative DS1 facility or arranges, or
                 agrees to allow, a physical degree of diversity or performance
                 that is not in accordance with the specifications of Bellcore,
                 GR-905-CORE, LSP acknowledges that the performance and
                 reliability of the SS7 protocol may be affected and the
                 performance and reliability standards described in GR-905-CORE
                 may be disqualified.

                 Dedicated Signaling Links are subject to SWBT compatibility
                 testing and certification requirements per the Network
                 Operations Forum Reference Document, per Bellcore, GR-905-CORE
                 and per SWBT Technical Publication, TP76638. First
                 interconnections to the SWBT signaling network per LSP and per
                 signaling point type of equipment will require pre-ordering
                 meetings to exchange information and schedule testing for
                 certification by SWBT.

         C.      USE OF THE STP

                 The Use of the STP provides for the use of the SWBT SS7
                 signaling network when LSP uses the SWBT Local Switching
                 Unbundled Network Element. The Use of the STP provides for the
                 use of the signaling link between the SWBT local switch and
                 the STP, the use of the signaling link and ports between the
                 SWBT tandem switch and the STP when applicable, the use of the
                 SWBT STP port and use of STP Transport. The Use of the STP is
                 a signaling network element incurred by use of the SWBT local
                 switching (i.e. Unbundled Local Switching). The Use of the STP
                 provides the SWBT signaling when LSP subscribers originate and
                 terminate calls from a SWBT SS7 equipped end office.


II.      DEFINITIONS

         Attachment 1, which is attached hereto and made a part hereof, contains
DEFINITIONS OF TERMS in this Appendix.



<PAGE>   211
                                                                    APPENDIX SS7
                                                                    Page 5 of 12



III.     MANNER OF PROVISIONING

         A.      SS7 TRANSPORT

                 LSP shall use SS7 Transport subject to the screening and
                 routing information of the SWBT STPs. SWBT shall provide
                 information to LSP on the routes and signaling point codes
                 served by the SWBT STPs.

                 SS7 Transport shall route ISUP messages for the purpose of
                 establishing trunk voice paths between switching machines.
                 Routes requiring ISUP routes longer than two SWBT STP pairs may
                 be provisioned pursuant to Attachment Network Element Bona Fide
                 Request per specific LSP request, if such route is technically
                 feasible. However, routes involving signaling point codes not
                 associated with LSP are subject to the route designated by the
                 owner of the SPC.

                 SS7 Transport shall route TCAP queries when feasible per the
                 SS7 Protocol to the SWBT "regional" STP pair that directly
                 serves the database of TCAP message. SS7 Transport shall route
                 TCAP responses from a SWBT "regional" STP pair to another SWBT
                 STP pair.

                 When LSP requires modification of SWBT's SS7 Service components
                 not otherwise provided in this contract, the modifications may
                 be furnished pursuant to Attachment Network Element Bona Fide
                 Request.

                 SS7 Transport provides a signaling route for messages only to
                 signaling points to which SWBT has a route. SS7 Transport does
                 not include the provision of a signaling route to every
                 possible signaling point. When SWBT does establish a route to a
                 signaling point in a mated pair of STPs, the route may not be
                 available to other SWBT pairs of STPs, until ordered. When SWBT
                 or LSP, pursuant to a service order, arranges to establish a
                 route to a signaling point, such route to the other signaling
                 point or other signaling network will be used by all signaling
                 points within and connected to the SWBT signaling network per
                 the standard requirements of the SS7 protocol.

                 Disputes concerning the association of a signaling point among
                 specific link sets associated with a SWBT mated STP will be
                 resolved by consultation with the signaling point owner, as
                 defined in the Local Exchange Routing Guide (LERG), Section 1,
                 assignment of Signaling Point Codes.

         B.      DEDICATED SIGNALING LINKS

                 LSP shall designate the signaling points and signaling point
                 codes associated with LSP. LSP shall provide information to
                 SWBT to allow SWBT to translate SWBT STPs. The information
                 shall define the screening and routing information 


<PAGE>   212
                                                                    APPENDIX SS7
                                                                    Page 6 of 12


                  for the signaling point codes of LSP. This information may
                  include global title address, translation type and subsystem
                  designations as needed.

             Signaling links from SWBT mated pairs of STPs shall connect to LSP
             premises (including collocation locations) within the same LATA. A
             set of links can be either:

             1.   "A" Link Sets from LSP's Signaling Point (SP)/Service
                  Switching Point (SSP). A minimum of two links will be
                  required, one from the SP/SSP to each STP; or,

             2.   "B" Link Sets from LSP's STPs that are connected to SWBT's
                  mated pair of STPs. A minimum of four links will be required
                  (i.e., a "quad") between the two pairs of STPs. (This same
                  arrangement is sometimes referred to as a set of "D" links.)

             An STP Port Termination and SS7 Link Cross Connect is required for
             each 56 kbps access link utilized for the Service. STP locations
             are set forth in the National Exchange Carrier Association, Inc.
             (NECA) Tariff F.C.C. No. 4.

             A pre-order meeting will define the SWBT facility availability and
             the degree of diversity in both the SWBT physical network and the
             LSP physical network from signaling point to signaling point for
             the link.

             All applicable signaling point codes for each signaling link must
             be installed at each of SWBT's interconnecting STPs.

             Call set-up times may be adversely affected when LSP, using SS7
             signaling, employs Intermediate Access Tandems (IATs) in its
             network. SWBT makes no warranties with respect to call set-up times
             when multiple STP pairs are involved or when the signaling traffic
             is exchanged between two non-SWBT signaling points.

             Provisioning of the SS7 Service is in accordance with SWBT CCS/SS7
             Network Interface Specifications (TP76638) and Bellcore Common
             Channel Network Interface Specification (GR-905-CORE), as amended.

             When LSP uses the Dedicated Signaling Links of another party and
             LSP submits an order for SWBT to change the routing or screening
             information associated with the other party's signaling links, LSP
             shall include with the order a Letter of Authorization (LOA). The
             LOA shall be from the other party (i.e. the owner of the set of
             links) and shall indicate that the other party shall agree to pay
             SWBT charges to change the translations associated with the link
             set and shall agree to pay SWBT charges associated with SS7
             Transport.

<PAGE>   213
                                                                    APPENDIX SS7
                                                                    Page 7 of 12



         C.       USE OF THE STP

                  When LSP orders SWBT Unbundled Local Switching the Use of the
                  STP shall apply. No order nor provisioning by LSP is needed.
                  The SWBT Local Switch will use the SWBT SS7 signaling network.

                  Any changes, additions or deletions to the SWBT SS7 signaling
                  network required per LSP shall be submitted pursuant to
                  Attachment Network Element Bona Fide Request.

IV.      DESCRIPTION OF RATE ELEMENTS

         The following rate elements apply to SS7 Service:

         A.       SS7 TRANSPORT

                  SS7 Transport shall be measured per octet of information
                  screened and routed.

                  LSP shall pay SS7 Transport Per Octet rate element for the
                  screening and routing of messages by each additional SWBT STP
                  pair. A usage rate applies per octet generated by action of
                  LSP.

         B.       DEDICATED SIGNALING LINKS

                  1.       SS7 Link Cross Connect

                           LSP shall pay the DS-0 or DS-1 rate for the SS7 Link
                           Cross Connect at the STP location for each Dedicated
                           Signaling Link. Rates are per DS-0 and DS-1 bandwidth
                           and per connection to unbundled dedicated facility or
                           connection to a collocation cage. Rates are per month
                           and nonrecurring installation per first or additional
                           cross connects ordered per order.

                  2.       STP Port Termination

                           LSP shall pay the STP Port Termination rate element
                           for each termination of the SS7 Link Cross Connect at
                           the SWBT STP. One STP Port Termination must be
                           installed at SWBT's interconnecting STP for each
                           Dedicated Signaling Link.

                           There are two charges that apply to the STP Port
                           Termination, i.e., a fixed recurring monthly rate per
                           port termination and a nonrecurring installation
                           charge per port.

         C.       SIGNALING POINT CODE ADDITION



<PAGE>   214
                                                                    APPENDIX SS7
                                                                    Page 8 of 12


                  LSP shall pay the Signaling Point Code Addition rate element
                  for the establishment and translation of each applicable CCS
                  network signaling point code at a SWBT STP. LSP shall pay a
                  nonrecurring charge per Signaling Point Code established at
                  each STP.

         D.       GLOBAL TITLE TRANSLATION (GTT) ADDITION

                  LSP shall pay the GTT Addition rate element for the
                  establishment of LSP's global title address, translation type
                  or subsystem information in the SWBT STP translations. LSP
                  shall pay a nonrecurring charge per GTT established at each
                  STP.

         E.       SERVICE REARRANGEMENT

                  LSP shall pay charges for rearrangement of the SS7 Service
                  which are not specifically addressed pursuant to the Network
                  Element Bona Fide Request process.

         F.       USE OF THE STP PER CALL

                  LSP shall pay the Use of the STP Per Call rate element for Use
                  of the SWBT STP. The rate shall apply for each call originated
                  by LSP subscribers using the SWBT Local Switch Unbundled
                  Network Element. The rate is based on an assumed mean quantity
                  of 200 octets of signaling used for each originated call times
                  the STP Transport rate element.

                  The Use of the STP Per Call is a surrogate for STP Transport
                  and Dedicated Signaling Links when LSP uses the SWBT Unbundled
                  Local Switching Network Element.


<PAGE>   215
                                                                    APPENDIX SS7
                                                                    Page 9 of 12



V.       RATES AND CHARGES

         Rates and Charges for the elements described above are as follows:

<TABLE>
<CAPTION>

                                                                   Monthly                           Nonrecurring
          SS7 Links - Cross Connects              Zone A           Zone B           Zone C         Initial Additional
          --------------------------              ------           ------           ------         ------- ----------
<S>                                               <C>              <C>              <C>            <C>        <C>    
          STP to Collocators Cage - DS0           $71.20           $71.20           $71.20         $258.75    $204.35
          STP to Collocators Cage- DS1            $51.30           $51.30           $51.30         $230.50    $176.15
          STP to SWBT MDF - DS0                   $71.20           $71.20           $71.20         $258.75    $204.35
          STP to SWBT DSX Frame-DS1               $51.30           $51.30           $51.30         $230.50    $176.15


</TABLE>

<TABLE>

<S>                                           <C>                                 <C>          <C>
          SS7
          Links
          STP Access Connection - 1.544 Mbps   See Dedicated
                                               Transport
          STP Access Link - 56 Kbps                 $100.16 fixed +
                                                      $0.91 per mile

          SS7 Signalling
          SS7 Signalling                          $0.000800 per call
          STP Port                                $1,737.50 per port               $207.95        ---
          STP Trunk Signalling                    $0.000004 per octet
          Point Code Addition                           N/A per point code          $36.00        ---
          Global Title Translation Addition             ICB                            ICB        ICB

</TABLE>


VI.      ORDERING THE SERVICE

         LSP shall abide by the following ordering guidelines:

         A.       SS7 TRANSPORT

                  LSP shall submit SWBT's CCS/SS7 Activity Notification Form,
                  identify the set of links the LSP will use and identify the
                  service(s) associated with each SPC. LSP shall identify
                  Signaling Point Code and Global Title Translation information
                  that must be translated into the SWBT STPs.

         B.       DEDICATED SIGNALING LINKS

                  LSP shall submit an Access Service Request form and SWBT's CCS
                  Activity Notification form. LSP shall identify the SWBT STPs,
                  the LSP premises, the circuit interconnection arrangement at
                  the LSP Dedicated Transport location and the LSP signaling
                  point. LSP shall identify Signaling Point Code and Global
                  Title Translation information that must be translated in the
                  SWBT STPs.

         C.       SIGNALING POINT CODE ADDITION

                  LSP shall submit a SWBT CCS Activity Notification form. LSP
                  shall identify the SWBT STPs and the LSP signaling point code
                  information that must be added 


<PAGE>   216
                                                                    APPENDIX SS7
                                                                   Page 10 of 12


                  or changed in the SWBT STP translations. If more than one pair
                  of SWBT STPs are affected, LSP shall indicate translation
                  route information.

         D.       GLOBAL TITLE TRANSLATION (GTT) ADDITION

                  LSP shall submit a SWBT CCS Activity Notification form. LSP
                  shall identify the SWBT Global Title Translation information
                  that must be added, deleted or changed in the SWBT STP
                  translations. If more than one pair of SWBT STPs are affected,
                  LSP shall indicate translation route information.

         E.       SERVICE REARRANGEMENT

                  LSP shall order a SS7 Signaling Service Rearrangement per
                  Attachment Network Element Bona Fide Request.

         F.       USE OF THE STP

                  Ordering requirements for the Use of the STP are included in
                  the requirements set forth in the ordering clause of the Local
                  Switching UNE (Attachment Switching), and are incorporated
                  here by reference.

VII.     RESPONSIBILITIES OF SWBT

         A.       SWBT shall manage the network and, at its sole discretion,
                  apply protective controls. Protective controls include actions
                  taken to control or minimize the effect of network failures or
                  occurrences, which include, but are not limited to, failure or
                  overload of SWBT or LSP facilities, natural disasters, mass
                  calling or national security demands.

         B.       SWBT shall determine the GTT and Translation Type (TT) route
                  for messages routed to GTT which are associated with SWBT
                  signaling points.

         C.       SWBT shall define regional functions and local functions of
                  its STPs. SWBT will route ISUP messages within the SWBT
                  signaling network subject to technical feasibility. Capacity
                  limitations shall define a temporary technical infeasibility
                  until the capacity limit can be resolved.

         D.       SWBT shall meet service performance standards as outlined in
                  GR-905-CORE and TP76638 except as otherwise provided herein.

         E.       In the event that SWBT provides under this contract special
                  service arrangements associated with diversity or other
                  arrangements that do not strictly adhere to GR-905-CORE and
                  TP76638 and are of non-compliance to the technical
                  publications 


<PAGE>   217
                                                                    APPENDIX SS7
                                                                   Page 11 of 12


                  or not certified by SWBT, LSP acknowledges that the service
                  performance standards need not be met in the provision of the
                  total service.

         F.       SWBT shall route messages generated by the action of LSP
                  throughout the SWBT signaling network. The content of the
                  messages is for the use of signaling points of origination and
                  destination. SWBT will not use any information within messages
                  for any purpose not required by or related to the use of the
                  SWBT signaling network. SWBT will not divulge any message or
                  any part of messages generated by LSP to any other party,
                  except as required to manage the SWBT signaling network or as
                  may be required by law.

        G.        SWBT shall determine the monthly charges and issue an invoice
                  to the billing address of LSP for the respective service(s)
                  requested by LSP and provided by SWBT. The invoice will
                  identify nonrecurring charges, recurring charges, and other
                  charges and credits, as they apply.

        H.        SWBT shall work cooperatively and provide knowledgeable
                  personnel to meet with LSP in order to provision, test and
                  install the SS7 Service in a timely fashion.

VIII.    RESPONSIBILITIES OF LSP

        A.        LSP shall provision the signaling links at the LSP premises
                  and from the LSP premises to the SWBT STP location in a
                  diverse, reliable and technically acceptable manner to comply
                  with the standard SS7 protocol, Bellcore GR-905-CORE and the
                  SWBT network.

        B.        If LSP requires a greater degree of diversity than SWBT
                  provides in the existing network, a special facility or a
                  special routing of services, LSP agrees to initiate a
                  Wholesale Construction request and pay additional charges as
                  SWBT may reasonably determine.

        C.        LSP shall identify to SWBT the SPC(s) associated with the LSP 
                  set of links.

        D.        When LSP orders the use of the SWBT STP, LSP shall specify the
                  set of signaling links to be used. If the links are provided
                  to another party LSP shall warrant to SWBT that the other
                  party is aware of the charges associated with the use of the
                  STP and that the other party will pay the monthly charges for
                  the use of the SWBT STP.

        E.        LSP shall identify to SWBT the Global Title and Translation 
                  Type information for messages that route to LSP.



<PAGE>   218
                                                                    APPENDIX SS7
                                                                   Page 12 of 12

        F.        When routing messages addressed to a SWBT Subsystem Number
                  (SSN), LSP shall use the SWBT defined SSN designation of the
                  SWBT mated STP pair to which the message is routed.

        G.        LSP shall transfer Calling Party Number Parameter information
                  unchanged, including the "privacy indicator" information, when
                  ISUP Initial Address Messages are interchanged with the SWBT
                  signaling network.

        H.        LSP shall verify the accuracy of information concerning the 
                  services ordered by LSP.

        I.        LSP shall designate the level of diversity associated with the
                  LSP premises. SWBT shall provide the same degree of diversity
                  as LSP provides.

        J.        LSP shall work cooperatively and provide knowledgeable
                  personnel to meet with SWBT in order to provision, test and
                  install the SS7 Service in a timely fashion.

        K.        LSP shall furnish to SWBT, at the time the SS7 Service is
                  ordered and annually thereafter, an updated three year
                  forecast of usage of the SS7 Signaling network. The forecast
                  shall include total annual volume and busy hour busy month
                  volume. SWBT shall utilize the forecast in its own efforts to
                  project further facility requirements.

        L.        LSP shall inform SWBT in writing thirty (30) days in advance
                  of any change in LSP's use of such SS7 Service which alters by
                  ten percent for any thirty (30) day period the volume of
                  signaling transactions by individual SS7 service that are
                  planned by LSP to be forwarded to SWBT's network. LSP shall
                  provide in said notice the reason, by individual SS7 service,
                  for the volume change.


<PAGE>   219
                                                                    
                                                                    Attachment 1
                                                                    Appendix SS7
                                                                     Page 1 of 2

                                  ATTACHMENT 1

                              DEFINITIONS OF TERMS

Common Channel Signaling (CCS)

A high-speed specialized packet switched communications network that is separate
(out-of-band) from the public packet switched and message networks. CCS carries
addressed signaling messages for individual trunk circuits and/or database
related services between Signaling Points (SS7 nodes) in the CCS network.

Compatibility Testing

Testing performed by representatives from SWBT and LSP to determine proper
interconnection of CCS network facilities for accurate transmission of system
signals and messages. This is often referred to as TR-905 Compatibility Testing.

Octet

8-bits of binary information.

Service Control Point (SCP)

A node in the CCS network that provides a database functionality.

Service Switching Point (SSP)

A signaling point that can launch queries to databases and receive/interpret
responses used to provide specific end user services.

Signal Transfer Point (STP)

A packet switch in the CCS network that is used to route SS7 protocol signaling
messages between signaling nodes. An STP provides screening and routing of SS7
messages. STPs transfer signaling messages to other networks. SWBT's signaling
network includes mated pairs of local and regional STPs.

Signaling Link

An end-to-end high-capacity digital, data quality, link operating at 56 kilobits
per second that transmits signaling information in the form of signaling
messages from one network SS7 node to another node in a CCS network. The Link
Type identifies the functionality of the signaling link sets. Signaling links
provide physical interconnection between signaling points of another party and
SWBT STPs.


<PAGE>   220
                                                                    Attachment 1
                                                                    Appendix SS7
                                                                     Page 2 of 2


Signaling Point (SP)

A node in the CCS network that originates and/or receives signaling messages, or
transfers signaling messages from one signaling link to another, or both.

Signaling Point Code (SPC)

An identifier code that identifies a signaling point in the CCS network. The
signaling point code provides an address within the CCS network which enables
messages to be routed to signaling points. Signaling Point Codes are 24 bit
binary numbers comprised of three segments: the Network Identification, the
Network Cluster, and the Member number within the cluster. Signaling Point Codes
are represented digitally as AAA-AAA-AAA, where "AAA" represents a decimal
number from 000 to 255.

Signaling Point of Interface (SPOI)

Mutually agreed point at which SWBT hands off signaling information to LSP.

Signaling System 7 (SS7)

See SS7 Protocol

Signaling System 7 (SS7) Protocol

The signaling protocol, Version 7, used by the nodes of the CCS network. The SS7
protocol used by SWBT is the American National Standards Institute (ANSI)
standard protocol defined by Bellcore Generic Requirement, GR-246-CORE, defined
by Bellcore requirements (GR-317-CORE, GR-394-CORE, GR-444-Core, GR-606-CORE,
GR-82-CORE, GR-905-CORE and various other documents) and defined by the SWBT
Technical Publication TP76638.


<PAGE>   221

                                                              APPENDIX RECORDING

                               APPENDIX RECORDING

                        RECORDING, MESSAGE PROCESSING AND
                 PROVISION OF INTEREXCHANGE CARRIER TRANSPORTED
                             MESSAGE DETAIL APPENDIX


This Appendix sets forth the terms and conditions under which SWBT will provide
recording, message processing and message detail services as described in total
in Exhibit I, SERVICES AND ASSOCIATED CHARGES, and those services specifically
selected by LSP as described in Exhibit II, SELECTED SERVICE OPTIONS AND METHOD
OF PROVISION and at the rates set forth in Exhibit III, BASIS OF COMPENSATION.
Exhibits I, II and III are attached hereto and made a part of this Appendix by
reference.

     I.  DEFINITIONS

         As used herein and for the purposes of this Appendix, the following
         terms shall have the meanings set forth below:

         A.       Access Usage Record (AUR) - a message record which contains
                  the usage measurement reflecting the service feature group,
                  duration and time of day for a message and is subsequently
                  used to bill access to Interexchange Carriers (IXCs).

         B.       Assembly and Editing - the aggregation of recorded customer
                  message details to create individual message records and the
                  verification that all necessary information required to ensure
                  all individual message records meet industry specifications is
                  present.

         C.       Billing Company - the company that bills end users for the
                  charges incurred in originating and terminating IXC
                  transported calls.

         D.       Centralized Message Distribution System (CMDS) - the national
                  network of private line facilities used to exchange Exchange
                  Message Records (EMR) formatted billing data between SWBT and
                  the Billing Company.

         E.       Data Transmission - the forwarding by SWBT of IXC transported
                  toll message detail and/or access usage record detail in EMR
                  format over data lines or on magnetic tapes to the appropriate
                  Billing Company.

         F.       Exchange Message Record (EMR) - Industry standard message
                  format as described in accordance with the Bellcore Practice
                  BR010-200-010 developed for the interexchange of
                  telecommunications message information.

         G.       Interexchange Carrier (IXC) - A third party transmission
                  provider that carries long distance voice and non-voice
                  traffic between user locations for a related 

                                                                               2
<PAGE>   222
                                                              APPENDIX RECORDING


                  recurring fee. IXCs provide service interstate and intrastate.
                  In some states IXCs are permitted to operate within a LATA.

         H.       Interexchange Carrier Transported - telecommunications
                  services provided by an IXC or traffic transported by
                  facilities belonging to an IXC.

         I.       Message Processing - the creation of individual EMR formatted
                  billable message detail records from individual recordings
                  that reflect specific billing detail for use in billing the
                  end user and/or access usage records from individual
                  recordings that reflect the service feature group, duration
                  and time of day for a message, Carrier Identification Code,
                  among other fields, for use in billing access to the
                  Interexchange Carriers. Message Processing includes performing
                  CMDS online edits required to ensure message detail and access
                  usage records are consistent with CMDS specifications.

         J.       Originating Local Exchange Carrier Company - the company whose
                  local exchange telephone network is used to originate calls
                  thereby providing originating exchange access to IXCs.

         K.       Provision of Message Detail - the sorting of all billable
                  message detail and access usage record detail by Revenue
                  Accounting Office, Operating Company Number or Service Bureau,
                  splitting of data into packs for invoicing, and loading of
                  data into files for data transmission to LSP for those records
                  created internally or received from other Local Exchange
                  Carrier Companies or Interexchange Carriers through SWBT's
                  internal network or national CMDS.

         L.       Record - a logical grouping of information as described in the
                  programs that process information and create the magnetic
                  tapes or data files.

         M.       Recording - the creation and storage on magnetic tape or other
                  medium of the basic billing details of a message in Automatic
                  Message Accounting (AMA) format.

         N.       Service Switching Point (SSP) - a signaling point that can
                  launch queries to databases and receive/interpret responses
                  used to provide specific customer services.

         O.       Switching Control Point (SCP) - the real time database system
                  that contains routing instructions for 800 calls. In addition
                  to basic routing instructions, the SCP may also provide
                  vertical feature translations, i.e., time of day, day of week
                  routing, out of area screening and/or translation of the
                  dialed 800 number to its assigned working telephone number.

         P.       800 SCP Carrier Access Usage Summary Record (SCP Record) - a
                  summary record which contains information concerning the
                  quantity and types of queries launched to a SWBT SCP. In those
                  situations where charges are applicable for 

                                                                               3
<PAGE>   223

                                                              APPENDIX RECORDING


                  the production and delivery of SCP records, such charges will
                  be those specified in Exhibit III-A pertaining to the
                  production and forwarding of AUR data.

         Q.       Terminating Local Exchange Carrier Company - the company whose
                  local exchange telephone network is used to terminate calls
                  thereby providing terminating exchange access to IXCs.

     II. RESPONSIBILITIES OF THE PARTIES

         A.       SWBT will record all IXC transported messages for LSP carried
                  over all Feature Group Switched Access Services that are
                  available to SWBT-provided recording equipment or operators.
                  Unavailable messages (i.e., certain operator messages which
                  are not accessible by SWBT-provided equipment or operators)
                  will not be recorded. The recording equipment will be provided
                  at locations selected by SWBT.

         B.       SWBT will perform assembly and editing, message processing and
                  provision of applicable access usage record detail for IXC
                  transported messages if the messages are recorded by SWBT.

         C.       SWBT will provide access usage records that are generated by 
                  SWBT.

         D.       Assembly and editing will be performed on all IXC transported
                  messages recorded by SWBT, during the billing period
                  established by SWBT and selected by LSP from Exhibit III-B.

         E.       Standard EMR record formats for the provision of billable
                  message detail and access usage record detail will be
                  established by SWBT and provided to LSP.

         F.       Recorded access usage record detail will not be sorted to
                  furnish detail by specific end users, by specific groups of
                  end users, by office, by feature group or by location.

         G.       SWBT will provide message detail to LSP either on magnetic
                  tapes or in data files, depending on the option contracted for
                  by LSP in Exhibit III. Only ONE method may be selected by the
                  LSP.

                  1.       Magnetic Tapes

                           a.  SWBT will supply the magnetic tapes, which
                               will be provided without the return of
                               previously supplied tapes.

                           b.  LSP will specify one of the following 
                               options for provision of tapes:

                                                                               4
<PAGE>   224
                                                              APPENDIX RECORDING

                               1)      SWBT may send the tapes to LSP via first
                                       class U.S. Mail Service or an equivalent
                                       service of SWBT's choice, or
                               2)      LSP may pick up the magnetic tapes at a 
                                       location designated by SWBT.
                               3)      If, at the request of LSP, overnight 
                                       delivery other than those provided in 
                                       1 & 2 above is requested, the cost of 
                                       this delivery will be at the expense of 
                                       LSP.

                  2.       Data Files

                           The message detail may be transmitted to LSP in data
                           files via data lines using software and hardware
                           acceptable to both parties.

         H.       In Exhibit III LSP will identify separately the location where
                  the tapes and any data transmissions should be sent (as
                  applicable) and the number of times each month the information
                  should be provided. SWBT reserves the right to limit the
                  frequency of transmission to existing SWBT processing and work
                  schedules, holidays, etc.

         I.       SWBT will determine the number of magnetic tapes or data files
                  required to provide the access usage record detail to LSP.

         J.       Access usage record detail previously provided LSP and lost or
                  destroyed through no fault of SWBT will not be recovered and
                  made available to LSP except on an individual case basis at a
                  cost determined by SWBT.

         K.       When SWBT receives rated billable messages from an IXC or
                  another Local Exchange Carrier (LEC) that are to be billed by
                  LSP, SWBT will forward those messages to LSP.

         L.       When SWBT has rated billable message detail originating from
                  LSP's end users requiring billing by another LEC or LSP, SWBT
                  will forward such messages to the appropriate Billing Company.

         M.       SWBT will record the applicable detail necessary to generate
                  access usage records and forward them to LSP for its use in
                  billing access to the IXC.

III.     BASIS OF COMPENSATION

         A.       Compensation for recording, assembly and editing, rating,
                  message processing and provision of messages provided
                  hereunder by SWBT for the LSP shall be based upon the rates
                  and charges set forth in Exhibit III, BASIS OF COMPENSATION.

                                                                               5
<PAGE>   225
                                                              APPENDIX RECORDING


         B.       When message detail is entered on a magnetic tape or data file
                  for provision of message detail to LSP, a per record charge
                  will apply for each record processed. SWBT will determine the
                  charges based on its count of the records processed.

IV.      LIABILITY

         A.       Except as otherwise provided herein, neither party shall be
                  liable to the other for any special, indirect, or
                  consequential damage of any kind whatsoever. A party shall not
                  be liable for its inability to meet the terms of this
                  Agreement where such inability is caused by failure of the
                  first party to comply with the obligations stated herein. Each
                  party is obliged to use its best efforts to mitigate damages.

         B.       When SWBT is notified that, due to error or omission,
                  incomplete data has been provided to the LSP, SWBT will make
                  reasonable efforts to locate and/or recover the data and
                  provide it to the LSP at no additional charge. Such requests
                  to recover the data must be made within 30 days from the date
                  the details initially were made available to the LSP. If
                  written notification is not received within 30 days, SWBT
                  shall have no further obligation to recover the data and shall
                  have no further liability to the LSP.

         C.       If, despite timely notification by the LSP, message detail is
                  lost and unrecoverable as a direct result of SWBT having lost
                  or damaged tapes or incurred system outages while performing
                  recording, assembly and editing, rating, message processing,
                  and/or transmission of message detail, SWBT will estimate the
                  volume of lost messages and associated revenue based on
                  information available to it concerning the average revenue per
                  minute for the average interstate and/or intrastate call. In
                  such events, SWBT's liability to the LSP shall be limited to
                  the granting of a credit adjusting amounts otherwise due from
                  it equal to the estimated net lost revenue associated with the
                  lost message detail.

         D.       SWBT will not be liable for any costs incurred by the LSP when
                  the LSP is transmitting data files via data lines and a
                  transmission failure results in the non-receipt of data by
                  SWBT.

         E.       The LSP agrees to defend, indemnify, and hold harmless SWBT
                  from any and all losses, damages, or other liability,
                  including attorney fees, that it may incur as a result of
                  claims, demands, or other suits brought by any party that
                  arise out of the use of this service by the LSP, its customers
                  or end users. The LSP shall defend against all end users'
                  claims just as if the LSP had provided such service to its end
                  users with its own employees.

         F.       The LSP also agrees to release, defend, indemnify and hold
                  harmless SWBT from any claim, demand or suit that asserts any
                  infringement or invasion of privacy or confidentiality of any
                  person(s), caused or claimed to be caused, directly or
                  indirectly, by SWBT employees and equipment associated with
                  provision of this 

                                                                               6
<PAGE>   226
                                                              APPENDIX RECORDING

                  service. This includes, but is not limited to suits arising
                  from disclosure of any customer specific information
                  associated with either the originating or terminating numbers
                  used to provision this service.

SWBT MAKES NO REPRESENTATIONS OR WARRANTIES, EXPRESS OR IMPLIED, INCLUDING BUT
NOT LIMITED TO ANY WARRANTY AS TO MERCHANTABILITY OR FITNESS FOR INTENDED OR
PARTICULAR PURPOSE WITH RESPECT TO SERVICES PROVIDED HEREUNDER. ADDITIONALLY,
SWBT ASSUMES NO RESPONSIBILITY WITH REGARD TO THE CORRECTNESS OF THE DATA
SUPPLIED BY LSP WHEN THIS DATA IS ACCESSED AND USED BY A THIRD PARTY.


                                                                               7
<PAGE>   227



                                    EXHIBIT 1

                         EXPLANATION OF SERVICE OPTIONS

The attached pages of this Exhibit I show the service options that are offered
under this Appendix and the charges that are associated with each option.
Alphabetical and numerical references in the CHARGES columns are to rates and
charges set forth in Exhibit III, BASIS OF COMPENSATION.

ORIGINATING 1+ DDD RECORDINGS - IXC TRANSPORTED MESSAGE DETAIL AND ACCESS USAGE
RECORDS

OPTION #1:        SWBT performs recording, assembly and editing, rating of
                  billable message detail and creates an Access Usage Record
                  (AUR) for all 1+ Interexchange Carrier (IXC) transported
                  messages originating from LSP end office telephone network and
                  forwards both billable message detail records and AUR records
                  to LSP.

OPTION #2:        SWBT performs recording, assembly and editing of the
                  billable message detail and extracts that detail to the IXC
                  for all 1+ IXC transported messages originating from LSP end
                  office. SWBT creates Access Usage Records for this traffic and
                  forwards those AUR records to LSP.

OPTION #3:        The IXCs do their own billable message recording for their
                  1+ IXC transported messages originating from LSP end office.
                  SWBT performs recording for Access purposes only, assembles
                  and edits this data, creates AURs and forwards the AUR records
                  to LSP.

ORIGINATING OPERATOR RECORDINGS - IXC TRANSPORTED MESSAGE DETAIL AND ACCESS
USAGE RECORDS

OPTION #4:        LSP Non-Equal Access End Office - The IXCs do their own
                  billable message recording. SWBT performs local and intraLATA
                  operator services for LSP. SWBT performs recording at the
                  operator switch for all 0+, 0-, Coin Sent Paid, CAMA and
                  International IXC transported messages. SWBT assembles and
                  edits this data, creates AURs and forwards the AUR records to
                  LSP.

OPTION #5:        LSP Equal Access End Office - The IXCs do their own
                  billable message recording. SWBT performs local and intraLATA
                  operator services for LSP. SWBT performs recording at the
                  operator switch for 0- only IXC transported messages. SWBT
                  assembles and edits this data, creates AURs and forwards the
                  AUR records to LSP.

OPTION #6:        LSP Equal or Non-Equal Access End Office - The IXCs do
                  their own billable message recording. LSP chooses to have SWBT
                  purchase source information from IXC in order to have
                  information required to create Access Usage Records. SWBT
                  assembles and edits this data, creates AURs and forwards the
                  AUR records to LSP.



                                                                               1
<PAGE>   228



OPTION #7:        The IXCs do their own billable message recording and
                  forward to SWBT the billable message detail for assembly and
                  editing and rating of these operator service IXC transported
                  messages. SWBT forwards the rated billable message detail to
                  the appropriate billing company, creates an AUR and forwards
                  the AUR records to LSP. This situation occurs when the LSP has
                  not signed a rating takeback waiver with the IXC.

800 RECORDINGS - IXC TRANSPORTED MESSAGE DETAIL

OPTION #8:        SWBT performs SSP function for LSP end office and bills
                  query charge to the appropriate IXC. SWBT performs recording
                  for Access purposes only, assembles and edits this data,
                  creates AURs and forwards AUR records to LSP.

OPTION #9:        SWBT performs SSP function for LSP end office. LSP
                  performs billing of query charge to the appropriate IXC. SWBT
                  performs recording at the SSP for Access purposes only,
                  assembles and edits this data, creates AURs and forwards AUR
                  records to LSP. SWBT performs recording at the SCP for query
                  billing purposes only, assembles and edits this data, creates
                  SCP records and forwards SCP records to LSP.

OPTION 10:        SWBT performs SCP function for LSP. SWBT performs
                  recording at the SCP, assembles and edits this data, creates
                  SCP records and forwards SCP records to LSP.

TERMINATING RECORDINGS - IXC TRANSPORTED ACCESS USAGE RECORDS

OPTION 11:        SWBT provides tandem function for LSP. LSP requests SWBT
                  to provide all Feature Group B, Feature Group C and Feature
                  Group D terminating usage recordings including Feature Group B
                  over D and Feature Group C over D. SWBT creates terminating
                  AURs for this data and forwards AUR records to the LSP.

OPTION 12:        SWBT provides tandem function for LSP. The LSP requests
                  SWBT to provide all Feature Group B terminating usage
                  recordings excluding B over D. SWBT creates terminating AURs
                  for this data and forwards AUR records to LSP.

OPTION 13:        SWBT provides tandem function for LSP. LSP requests SWBT
                  to provide all Feature Group B terminating usage recordings
                  including Feature Group B over D. SWBT creates terminating
                  AURs for this data and forwards AUR records to the LSP.


OPTION 14:        SWBT provides tandem function for LSP. LSP requests SWBT
                  to provide all Feature Group D terminating usage recordings
                  including B over D and C over D. SWBT creates terminating AURs
                  for this data and forwards AUR records to the LSP.

                                                                               2
<PAGE>   229



OPTION 15:        SWBT provides tandem function for LSP. The LSP requests
                  SWBT to provide all Feature Group D terminating usage
                  recordings including B over D. SWBT creates terminating AURs
                  for this data and forwards AUR records to the LSP.

MESSAGE PROVISIONING:

OPTION 16:        SWBT will forward all IXC transported message detail
                  records or access usage records to LSP generated internally
                  within SWBT system or received via CMDS from an IXC or another
                  Local Exchange Carrier or LSP. LSP forwards rated IXC
                  transported message detail or access usage detail to SWBT for
                  distribution to the appropriate billing company through SWBT's
                  internal network or using the CMDS network.

                           There is no charge for this option under this
                           Appendix if LSP has also executed, as part of an
                           agreement executed pursuant to this Statement, an
                           Appendix for SWBT to provide "Hosting" services to
                           LSP, of if LSP has executed a separate agreement with
                           SWBT for "Hosting" services to be provided from SWBT
                           to LSP.


                                                                               3
<PAGE>   230



                            DRAFT APPENDIX RECORDING

                                   EXHIBIT II

                            SELECTED SERVICE OPTIONS

                                       AND

                               METHOD OF PROVISION

The service options and method of provision selected by the LSP under this
Appendix are as indicated on page two, attached, of this Exhibit II. Numerical
references are to service options shown in Exhibit I.


                                                                               4
<PAGE>   231



                               APPENDIX RECORDING

                                   EXHIBIT II

                            SELECTED SERVICE OPTIONS
                                       AND
                               METHOD OF PROVISION


Attached to and made a part of the RECORDING, MESSAGE PROCESSING AND PROVISION
OF INTEREXCHANGE CARRIER TRANSPORTED MESSAGE DETAIL AGREEMENT effective
___________, 19___, between Southwestern Bell Telephone Company and
______________________________ .

The service options and method of provision selected by the LSP under this
Appendix are as indicated on page 2, attached, of this Exhibit II. Numerical
references are to service options shown in Exhibit I.













Approved and executed the ____________ day of _________________, 19________.

________________________________              SOUTHWESTERN BELL
                                              TELEPHONE COMPANY


By:_____________________________              By:_______________________________
              (Title)                                         (Title)


                                                                               5
<PAGE>   232


                               APPENDIX RECORDING

                                   EXHIBIT II

                            SELECTED SERVICE OPTIONS
                             AND METHOD OF PROVISION

                                 EFFECTIVE DATE:
                                                -----------------------
<TABLE>
<CAPTION>

                                                                                                                           MESSAGE
                       1+DDD                OPERATOR HANDLED       800 SERVICE            TERMINATING AUR               PROVISIONING
                      OPTIONS                    OPTIONS             OPTIONS                  OPTIONS                      OPTIONS  
- ------------------------------------------------------------------------------------------------------------------------------------
<S>                <C>                 <C>                      <C>                   <C>                                  <C>    
NPA/NXX            1     2    3        4    5     6     7       8      9      10      11    12   13    14    15              16

- ------------------------------------------------------------------------------------------------------------------------------------

- ------------------------------------------------------------------------------------------------------------------------------------

- ------------------------------------------------------------------------------------------------------------------------------------

- ------------------------------------------------------------------------------------------------------------------------------------

- ------------------------------------------------------------------------------------------------------------------------------------

- ------------------------------------------------------------------------------------------------------------------------------------

- ------------------------------------------------------------------------------------------------------------------------------------

- ------------------------------------------------------------------------------------------------------------------------------------

- ------------------------------------------------------------------------------------------------------------------------------------

- ------------------------------------------------------------------------------------------------------------------------------------

- ------------------------------------------------------------------------------------------------------------------------------------

- ------------------------------------------------------------------------------------------------------------------------------------

</TABLE>




   Numerical references are to specific service options listed in Exhibit I.

                                                                               6
<PAGE>   233

                               APPENDIX RECORDING

                                   EXHIBIT II

                            SELECTED SERVICE OPTIONS
                             AND METHOD OF PROVISION

                                 EFFECTIVE DATE:  
                                                ----------
<TABLE>
<CAPTION>

   METHOD OF PROVISION:

<S>                       <C>                       <C>                                <C> 
Circle One:               DATA FILE                 9 TRACK MAGNETIC TAPE              18 TRACK MAGNETIC TAPE


</TABLE>



                                                                               7
<PAGE>   234


                            DRAFT APPENDIX RECORDING

                                  EXHIBIT III-A

           BASIS OF COMPENSATION [RATES TO BE CONSISTENT WITH ORDER.]

                                   EFFECTIVE:
                                             ------------------------ 
        LSP shall pay SWBT the following amounts for services provided under the
        Recording, Message Processing and Provision of Message Detail Appendix.


<TABLE>
<CAPTION>

        TYPE OF ACTIVITY                                                           RATE
       <S>          <C>                                                            <C>  
        A.          Recording
                            Per AUR                                                $.0100

        B.          Assembly and Editing
                            Per Message and/or AUR                                 $.0050

        C.          Rating
                            Per Message                                            $.0050

        D.          Message Processing
                            Per Message and/or AUR                                 $.0050

        E.          Provision of Message Detail
                            Per Record                                             $.0030

        F.          Source Information Provided
                    1.      Per Record Purchased - Meet Point Bill Applicable      $.0115
                    2.      Per Record Purchased - Meet Point Bill Not Applicable  $.0230

</TABLE>

                                                                               8

<PAGE>   235


                            DRAFT APPENDIX RECORDING
                                  EXHIBIT III-B

                               INVOICE DESIGNATION


   COMPANY NAME:
                ---------------------------------------------------------------
   EXCHANGE COMPANY I.D. NUMBER (OCN):
                                       ---- ---- ---- ----


   BILLABLE INVOICE INTERVAL:

        Check One:



[  ]                        Daily (Full Status RAO Companies will receive
                   billable messages daily.)



[  ]                        Bill period (A maximum of five dates may be chosen.)
                   A file is created five workdays from each bill period date,
                   and three additional days should be allowed for distribution.
                   Circle a maximum of five bill period dates:

<TABLE>


<S><C>      
   1     3     5     7     9     11     13     15     17     19     21     23     25     27     29

</TABLE>


   TAPE MAILING ADDRESS:
   (Full RAO Companies will receive AURs at the same address as billable message
toll.)

                                                                               9
<PAGE>   236

                            DRAFT APPENDIX RECORDING
                                  EXHIBIT III-B


   AUR INVOICE INTERVAL:

         Check One:


[  ]                        Daily (Full Status RAO Companies will receive AURs
                   daily.)



[  ]                        Bill period (A maximum of five dates may be chosen.)
                   A file is created five workdays from each bill period date,
                   and three additional days should be allowed for distribution.
                   Circle a maximum of five bill period dates:


<TABLE>

<S><C>   
   1     3     5     7     9     11     13     15     17     19     21     23     25     27     29

</TABLE>

   TAPE MAILING ADDRESS:
   (Full RAO Companies will receive AURs at the same address as billable message
   toll.)



                                                                              10














<PAGE>   237
                                                   APPENDIX RESALE (MO, AR & KS)
                                                                    PAGE 2 OF 11


                                 APPENDIX RESALE

This Appendix sets forth the rates, terms and conditions for those services
available for sale at retail to end users which are made available to LSPs by
SWBT for resale.

1.0      TERMS AND CONDITIONS OF SERVICE

         1.1      For services included in this Appendix, the rules and
                  regulations associated with the corresponding tariffs apply
                  except for applicable resale restrictions, which are offered
                  through tariffs by SWBT to its end users and except as
                  otherwise provided herein.

         1.2      LSP shall only sell Plexar services to a single end user.

         1.3      Except where otherwise explicitly provided in the
                  corresponding tariffs, LSP shall not permit the sharing of a
                  service by multiple end users or the aggregation of traffic
                  from multiple end users onto a single service or except where
                  SWBT permits such sharing by its own end users.

         1.4      The LSP shall resell  these  telecommunications  services  
                  only to the same class of customers to which SWBT sells the
                  services, e.g. residence service may not be resold to business
                  customers. LSP may only resell Lifeline Assistance, Link-Up,
                  and other like services to similarly situated customers who
                  are eligible for such services. Further, to the extent LSP
                  resells services that require certification on the part of the
                  buyer, LSP will ensure that the buyer has received proper
                  certification and complies with all rules and regulations as
                  established by the Commission.

         1.5      SWBT promotions of ninety (90) days or less shall not be 
                  available to the LSP for resale.

         1.6      The LSP shall not use a resold service to avoid the rates,
                  terms and conditions of SWBT's corresponding retail tariff.

         1.7      The LSP shall not use resold local exchange telephone service
                  to provide access or interconnection services to itself,
                  interexchange carriers (IXCs), wireless carriers, competitive
                  access providers (CAPs), or other telecommunications
                  providers. Provided however, that LSP may permit its end users
                  to use resold local exchange telephone service to access IXCs,
                  wireless carriers, CAPs, or other retail telecommunications
                  providers.

         1.8      An End User Common Line (EUCL) charge will continue to apply
                  for each local exchange line resold under this agreement. All
                  federal rules and regulations associated with EUCL charges, as
                  found in Tariff FCC 73, also apply.

<PAGE>   238

                                                   APPENDIX RESALE (MO, AR & KS)
                                                                    PAGE 3 OF 11


         1.9      To the extent allowable by law, LSP shall be responsible for
                  Primary Interexchange Carrier (PIC) change charges associated
                  with such local exchange line. LSP shall pay for PIC changes
                  at the tariffed rate.

         1.10     SWBT shall provide the services covered by this Appendix
                  subject to availability of existing facilities and on a
                  nondiscriminatory basis with its other customers. LSP shall
                  resell the services provided herein only in those service
                  areas in which such resale services or any feature or
                  capability thereof are offered at retail by SWBT as the
                  incumbent local exchange carrier to its end users.

         1.11     When LSP converts an end user  currently  receiving  
                  non-complex service from the SWBT network, without any changes
                  to SWBT's network, LSP will be charged a per-order conversion
                  charge of twenty-five dollars ($25.00) in Arkansas, Kansas and
                  Missouri. When LSP converts an end user with non-complex
                  service and adds or changes are made to the network, the
                  respective twenty-five dollars ($25.00) conversion charge will
                  apply, as well as any normal service order charges associated
                  with said changes. All nonrecurring service connection
                  charges, excluding the conversion charge mentioned above, will
                  be charged at a discount for those services listed in Exhibits
                  A & B to this Appendix. Complex conversion orders will be
                  charged at a rate of one hundred twenty-five dollars
                  ($125.00). Custom Services conversions (e.g., Plexar Custom)
                  will be handled on a Customer Specific Proposal basis.

         1.12     For the purposes of ordering service under this Appendix, all
                  requests for service shall be handled as an initial request
                  for service. The additional line rate for Service Order
                  Charges shall apply only to those requests for additional
                  residential service at the end user's same location where a
                  residential line is currently provided on SWBT's network,
                  regardless of the non-facilities based local service provider
                  of record.

         1.13     If the LSP is in  violation of a  provision of this  
                  Appendix, SWBT will notify the LSP of the violation in
                  writing. Such notice must refer to the specific provision
                  being violated. At such time, the LSP will have thirty (30)
                  days to correct the violation and notify SWBT in writing that
                  the violation has been corrected. SWBT will then bill the LSP
                  for the charges which should have been collected by SWBT or
                  the actual revenues collected by the LSP from its end users
                  for the stated violation, whichever is greater. Should the LSP
                  dispute the violations, it must notify SWBT in writing within
                  fourteen (14) days of receipt of notice from SWBT. Disputes
                  will be resolved as outlined in the Disputed Amounts Section
                  of the Agreement.

         1.14     SWBT is not required to make services available for resale at
                  wholesale rates to LSP for its own use. SWBT, however, shall
                  at its option agree to allow LSP to purchase SWBT's
                  Telecommunications Services and other services available for
                  resale as outlined in the exhibits to this Appendix, as long
                  as said services are not resold exclusively or predominately
                  to LSP, its subsidiaries, or affiliates.

<PAGE>   239

                                                   APPENDIX RESALE (MO, AR & KS)
                                                                    PAGE 4 OF 11


         1.15     The effective date of this Appendix shall be ten (10) days 
                  after the date the Commission approves the Interconnection 
                  Agreement.

2.0      ANCILLARY SERVICES

         2.1      Where available, SWBT will afford LSP end users with the
                  ability to make 911 calls. LSP shall be responsible for
                  collecting and remitting all applicable 911 surcharges on a
                  per line basis to the Public Safety Answering Point (PSAP).

         2.2      Where requested by SWBT, the LSP shall provide SWBT with
                  accurate and complete information regarding end users in a
                  format and time frame prescribed by SWBT, for purposes of 911
                  administration.

         2.3      SWBT shall provide LSP's end users access to SWBT Directory
                  Assistance Service. LSP shall pay SWBT amounts attributable to
                  Directory Assistance services used by LSP's end users.
                  Discounts associated with the utilization of Directory
                  Assistance Service are outlined in the exhibits to this
                  Appendix.

         2.4      SWBT shall provide, at no additional charge, a straight line
                  listing of the LSP end user in the appropriate SWBT local
                  White Pages. Subscriber listing information on resold lines
                  shall remain the property of SWBT.

         2.5      Additional Listing services (e.g., foreign or signature
                  listings) can be purchased by LSP for its end users on a per
                  listing basis. LSP shall pay SWBT amounts attributable to
                  Additional Listing services used by LSP's end users. The
                  exhibits outline the discounts associated with such additional
                  listing services.

         2.6      SWBT or its agents will deliver local White Pages directories
                  to LSP end user's premises at the same time and under the same
                  conditions that such directories are delivered to SWBT end
                  users.

                  2.6.1   LSP end users shall be entitled to one directory per
                          basic residential or business line provided by SWBT
                          pursuant to this Appendix.

                  2.6.2   SWBT, or its agents, shall deliver a White Pages
                          Directory to LSP end users' premises at the same time
                          that such directories are delivered to SWBT end users.
                          If an LSP's end user already has a current SWBT
                          directory, SWBT shall not be required to deliver a
                          directory to that end user until new directories are
                          published for that end user's location.

         2.7      SWBT shall provide LSP's end users access to SWBT's Operator
                  Services. LSP shall pay SWBT amounts attributable to Operator
                  Services used by LSP's end users. Discounts associated with
                  the utilization of Operator Services features are outlined in
                  the exhibits to this Appendix.

<PAGE>   240

                                                   APPENDIX RESALE (MO, AR & KS)
                                                                    PAGE 5 OF 11


3.0      BRANDING

         3.1      Except where otherwise required by law, LSP shall not, without
                  SWBT's written authorization, offer the resale services
                  covered by this Appendix using the trademarks, service marks,
                  trade names, brand names, logos, insignia, symbols or
                  decorative designs of SWBT or its affiliates, nor shall the
                  LSP state or imply that there is any joint business
                  association or similar arrangement with SWBT in the provision
                  of telecommunications services to its own customers. The LSP
                  may brand services included in this Appendix with its own
                  brand name, but SWBT will not provide for LSP branding of
                  those services.

         3.2      Development of Branding Directory Assistance and Operator 
                  Services

                  A.       REQUIREMENTS - Pursuant to Section 226 (b) of The
                           Telecommunications Act of 1996, each provider of
                           Operator Services is required to:

                           1.       provide its brand at the beginning of each
                                    telephone call and before the consumer 
                                    incurs any charge for the call; and
                               
                           2.       disclose immediately to the consumer, upon
                                    request a quote of its rates or charges for
                                    the call.
                               
                           3.       Where SWBT provides LSPs OS and DA services
                                    via the same trunk, both the OS and DA calls
                                    will be branded with the same brand. Since
                                    SWBT's DA and OS utilize the same trunk
                                    group, LSP will receive the same brand for
                                    both DA/OS. Such branding will be provided
                                    pursuant Section B. below.

                  B.       CALL BRANDING - In compliance with A. 1. above, SWBT
                           will brand DA/OS in LSP's name based upon the
                           criteria outlined below:

                           1.       LSP will provide SWBT with written
                                    specification of its company name to be used
                                    in creating LSP specific branding messages
                                    for its DA/OS calls.

                           2.       An initial non-recurring charge applies per
                                    TOPS switch, per load, for the establishment
                                    of Call Branding as well as a charge per
                                    TOPS switch, per subsequent load to change
                                    the brand. In addition, a per call charge
                                    applies for every DA/OS call handled by SWBT
                                    on behalf of LSP when such services are
                                    provided in conjunction with resale
                                    services. Prices for Call Branding are as
                                    outlined in Exhibit C, attached hereto and
                                    incorporated herein.

                  C.       RATE/REFERENCE INFORMATION - SWBT will provide LSP
                           DA/OS Rate/Reference Information based upon the
                           criteria outlined below:

<PAGE>   241

                                                   APPENDIX RESALE (MO, AR & KS)
                                                                    PAGE 6 OF 11


                           1.       LSP will furnish DA/OS Rate and Reference
                                    Information in a mutually agreed to format
                                    or media thirty (30) days in advance of the
                                    date when the DA/OS Services are to be
                                    undertaken.

                           2.       LSP will inform SWBT, in writing, of any
                                    changes to be made to such Rate/Reference
                                    Information ten (10) working days prior to
                                    the effective Rate/Reference change date.
                                    LSP acknowledges that it is responsible to
                                    provide SWBT updated Rate/Reference
                                    Information in advance of when the
                                    Rates/Reference Information are to become
                                    effective.

                           3.       In all cases when a SWBT Operator receives a
                                    rate request from a LSP end user, SWBT will
                                    quote the applicable DA/OS rates as provided
                                    by LSP.

                           4.       An initial non-recurring charge will apply
                                    per TOPS switch for loading of LSP's DA/OS
                                    Rate/Reference Information as well as a
                                    charge for each subsequent change, per TOPS
                                    switch to either the LSP's DA/OS Services
                                    Rate or Reference Information as outlined in
                                    Exhibit C, attached hereto and incorporated
                                    herein.

         3.4      SWBT shall also offer LSP the opportunity to customize route
                  DA/OS beginning March 1, 1997, where technically feasible. LSP
                  agrees to pay SWBT appropriate charges associated with
                  customized routing on an ICB basis.

4.0      RESPONSIBILITIES OF SWBT

         4.1      SWBT shall allow LSP to place service orders and receive phone
                  number assignments (for new lines). These activities shall be
                  accomplished by telephone call or facsimile until electronic
                  interface capability has been established. SWBT, with input
                  from LSP, shall provide interface specifications for
                  electronic access for these functions to LSP once such
                  electronic interfaces become technically feasible and are in
                  place. However, LSP shall be responsible for modifying and
                  connecting any of its systems with SWBT provided interfaces
                  when such interfaces become available, as outlined in Appendix
                  OSS.

         4.2      SWBT shall implement LSP service orders within the same time
                  intervals SWBT uses to implement service orders for similar
                  services for its own end users.

         4.3      LSP will have the ability to report trouble for its end users
                  to appropriate SWBT trouble reporting centers twenty-four (24)
                  hours a day, seven (7) days a week. LSP will be assigned a
                  customer contact center when initial service agreements are
                  made. LSP end users calling SWBT will be referred to LSP at
                  the number provided by LSP.

<PAGE>   242

                                                   APPENDIX RESALE (MO, AR & KS)
                                                                    PAGE 7 OF 11


                  4.3.1   Methods and procedures for ordering and trouble
                          reporting are outlined in the Handbook for
                          Non-Switched Based Providers dated 11/15/95, as
                          amended by SWBT from time to time. Both parties agree
                          to abide by the procedures contained therein.

         4.4      SWBT will provide LSP with the detailed billing information in
                  a standard electronic format as outlined in Appendix OSS
                  necessary for LSP to issue a bill to its end users. On no less
                  than sixty (60) days advance written notice, LSP will have the
                  option of receiving daily usage to monitor the patterns of its
                  end users' usage sensitive services. LSP agrees to pay SWBT
                  three tenths of a cent ($.003) per message.

         4.5      SWBT shall make telecommunications services that SWBT provides
                  at retail to subscribers who are not telecommunications
                  carriers available for resale consistent with its obligation
                  under Section 251(c)(4)(A) of the Telecommunications Act. SWBT
                  currently uses the Accessible Letter process to notify LSP of
                  new services available for resale during the term of this
                  Agreement. The notification shall advise LSP of the category
                  in which such new service shall be placed and the same
                  discount already applicable to LSP in that category shall
                  apply to the new service. Should SWBT change its notification
                  procedures to the LSP, the notice will be no less prompt than
                  the Accessible Letter.

                  4.5.1   Furthermore, to the extent that a federal or state
                          regulatory agency adopts a final order establishing
                          wholesale discounts under Section 252(d)(3) of the
                          Telecommunications Act, which is not stayed and which
                          directs SWBT to apply state-specific wholesale
                          discount percentages which are different from those
                          incorporated within this Agreement, either Party shall
                          have the option of converting to that discount level
                          upon ten (10) days written notice to the other Party.

         4.6      LSP end user's activation of Call Trace shall be handled by
                  the SWBT Call Trace Center (CTC) or its Annoying and Anonymous
                  Call Bureau. SWBT shall notify LSP of requests by its end
                  users to provide the call records to the proper authorities.
                  Subsequent communication and resolution of the case with LSP's
                  end user (whether that end user is the victim or the suspect)
                  will be coordinated through the LSP.

                  4.6.1   LSP understands that for services where reports are
                          provided to law enforcement agencies (e.g., Call
                          Trace) only billing number and address information
                          shall be provided. It shall be the LSP's
                          responsibility to provide additional information
                          necessary for any police investigation. LSP shall
                          indemnify SWBT against any claims that insufficient
                          information led to inadequate prosecution. SWBT shall
                          handle law enforcement requests consistent with the
                          Miscellaneous-Law Enforcement Section of the
                          Interconnection Agreement.

<PAGE>   243

                                                   APPENDIX RESALE (MO, AR & KS)
                                                                    PAGE 8 OF 11


         4.7      LSP may offer to resell Customer Initiated Suspension and 
                  Restoral Service to their end users. SWBT will offer to LSP
                  Company Initiated Suspension service for their own purposes at
                  the SWBT retail tariffed rate. Should LSP choose to suspend
                  their end user through Company Initiated Suspension Service,
                  this suspension period shall not exceed fifteen (15) calendar
                  days. If LSP issues a disconnect on their end user account
                  within the fifteen (15) day period, appropriate services will
                  not be billed for the suspension period. However, should LSP
                  issue a disconnect after the fifteen (15) day suspension
                  period, LSP will be responsible for all appropriate charges on
                  the account back to the suspension date. Should LSP restore
                  their end user, restoral charges at the SWBT retail tariffed
                  rate will apply and LSP will be billed for the appropriate
                  service from the time of suspension.

5.0      RESPONSIBILITIES OF LSP

         5.1      Prior to submitting an order under this Agreement, LSP shall
                  obtain end user authorization as required by applicable state
                  or federal laws and regulations, and assumes responsibility
                  for applicable charges as specified in Section 258(b) of the
                  Telecommunications Act of 1996. SWBT shall abide by the same
                  applicable laws and regulations.

         5.2      Only an end user can initiate a challenge to a change in its 
                  local exchange service provider. If an end user notifies SWBT
                  or LSP that the end user requests local exchange service, the
                  Party receiving such request shall be free to immediately
                  provide service to such end user. SWBT shall be free to
                  connect the end user to any local service provider based upon
                  the local service provider's request and local service
                  provider's assurance that proper end user authorization has
                  been obtained. LSP shall make authorization available to SWBT
                  upon request and at no charge.

         5.3      When an end user changes or withdraws authorization, each
                  Party shall release customer-specific facilities in accordance
                  with the end user customer's direction or the direction of the
                  end user's authorized agent. Further, when an end user
                  abandons the premise, SWBT is free to reclaim the facilities
                  for use by another customer and is free to issue service
                  orders required to reclaim such facilities.

         5.4      Neither Party shall be obligated by this Agreement to
                  investigate any allegations of unauthorized changes in local
                  exchange service (slamming) on behalf of the other Party or a
                  third party. If SWBT, on behalf of LSP, agrees to investigate
                  an alleged incidence of slamming, SWBT shall charge LSP a
                  fifty dollar ($50) investigation fee.

         5.5      When SWBT receives an order from LSP for services under this
                  Agreement and SWBT is currently providing the same services to
                  another local service provider for the same end user, SWBT
                  shall notify the end user's local service provider of record
                  of such order coincident with processing the order, should LSP
                  subscribe 

<PAGE>   244

                                                   APPENDIX RESALE (MO, AR & KS)
                                                                    PAGE 9 OF 11


                  to the Local Disconnect Report (LDR) as outlined below. It
                  shall then be the responsibility of the local service provider
                  of record and LSP to resolve any issues related to the end
                  user. This paragraph shall not apply to new additional lines
                  and services purchased by an end user from multiple LSPs or
                  from SWBT.

                  5.5.1   On no less than sixty (60) days notice, LSP may 
                          request the LDR., SWBT agrees to furnish to LSP the
                          Billing Telephone Number (BTN), Working Telephone
                          Number (WTN), and terminal number of all end users who
                          have disconnected LSP's service. LSP understands and
                          agrees that the CARE interface will be used to provide
                          such information and such information will only be
                          available via the CARE electronic data transmission as
                          outlined in Appendix OSS. Information will be provided
                          on a per WTN basis to be priced on a per WTN basis.
                          SWBT will provide LSP no less than thirty (30) days
                          notice prior to any change of the per-WTN charge. SWBT
                          grants to LSP a non-exclusive right to use the
                          information provided by SWBT. LSP will not permit
                          anyone but its duly authorized employees or agents to
                          inspect or use this information. LSP agrees to pay
                          SWBT ten cents ($0.10) per WTN and any applicable
                          transmission charges for the LDR.

         5.6      The LSP agrees to hold harmless and indemnify SWBT against any
                  and all liability and claims, including reasonable attorney's
                  fees, that may result from SWBT acting under this Article.

         5.7      LSP is solely responsible for the payment of charges for all
                  services furnished under this Appendix including, but not
                  limited to, calls originated or accepted at LSP's location and
                  its end users' service locations, with the exception of any
                  retail services provided directly by SWBT to the end user
                  which SWBT shall be responsible for billing.

                  5.7.1.  Interexchange carried traffic (e.g., sent-paid,
                          information services and alternate operator services
                          messages) received by SWBT for billing to resold
                          end-user accounts will be returned as unbillable and
                          will not be passed on to LSP for billing. An
                          unbillable code returned with those messages to the
                          carrier will indicate that the messages originated
                          from a resold account and will not be billed by SWBT.

         5.8      SWBT shall not be responsible for the manner in which the use
                  of resold service, or the associated charges are allocated to
                  others by LSP. All applicable rates and charges for such
                  services will be billed to and shall be the responsibility of
                  LSP, with the exception of other retail services provided
                  directly to the end user by SWBT as described in paragraph 7
                  above.

                  5.8.1   Compensation for all services shall be paid regardless
                          of a Party's ability or inability to collect charges
                          from its end user for such service.

<PAGE>   245

                                                   APPENDIX RESALE (MO, AR & KS)
                                                                   PAGE 10 OF 11


         5.9      If LSP does not wish to be responsible for collect, third
                  number billed, toll and information services (e.g., 900)
                  calls, it must order the appropriate blocking for resold lines
                  under this Appendix and pay any applicable charges. LSP
                  acknowledges that blocking is not available for certain types
                  of calls, including 800 numbers.

         5.10     LSP shall be responsible for modifying and connecting any of
                  its systems with SWBT-provided interfaces as described in this
                  Appendix.

         5.11     LSP shall be responsible for providing to its end users and to
                  SWBT a telephone number or numbers that LSP's end users can
                  use to contact LSP in the event of service or repair requests.
                  In the event that LSP's end users contact SWBT with regard to
                  such requests, SWBT shall inform the end user that they should
                  call LSP and may provide LSP contact number. The requirements
                  herein are subject to additional terms and conditions in the
                  Coordinated Repair Calls Section of the Agreement.

6.0      PROCEDURES FOR NONPAYMENT AND DISCONNECTION

         6.1      If LSP fails to pay when due, any and all charges billed to
                  them under this Agreement, including any late payment charges
                  (Unpaid Charges), and any portion of such charges remain
                  unpaid more than fifteen (15) days after the due date of such
                  Unpaid Charges, SWBT shall notify LSP in writing that in order
                  to avoid having service disconnected, LSP must remit all
                  Unpaid Charges to SWBT within fourteen (14) business days.

         6.2      If LSP disputes the billed charges, it shall, within the
                  fourteen (14) day period provided for above, inform SWBT in
                  writing which portion of the charges it disputes, including
                  the specific details and reasons for its dispute; immediately
                  pay to SWBT all undisputed charges; and pay all disputed
                  charges into an interest bearing escrow account.

         6.3      Disputes hereunder shall be resolved in accordance with the
                  procedures identified in the Dispute Resolution Section of the
                  Interconnection Agreement. Failure of LSP to pay charges
                  deemed owed to SWBT after conclusion of the Arbitration shall
                  be grounds for termination under this section.

         6.4      If any LSP charges remain unpaid or undisputed twenty-nine
                  (29) days past the due date, SWBT shall notify LSP, the
                  Commission and the end user's IXC(s) of Record in writing,
                  that unless all charges are paid within sixteen (16) days,
                  LSP's service shall be disconnected and its end users shall be
                  defaulted to SWBT local service. SWBT will also suspend order
                  acceptance at this time.

         6.5      If any LSP charges remain unpaid or undisputed forty (40) days
                  past the due date, LSP shall, at its sole expense, notify its
                  end users, the Commission and the end user's of Record that
                  their service may be disconnected for LSP failure to pay

<PAGE>   246

                                                   APPENDIX RESALE (MO, AR & KS)
                                                                   PAGE 11 OF 11


                  Unpaid Charges, and that its end users must affirmatively
                  select a new local service provider within five (5) days. The
                  notice shall also advise the end user that SWBT will assume
                  the end user's account at the end of the five (5) day period
                  should the end user fail to select a new local service
                  provider.

         6.6      If any LSP charges remain unpaid or undisputed forty-five (45)
                  days past the due date, SWBT shall disconnect LSP and transfer
                  all LSP's end users who have not selected another local
                  service provider directly to SWBT's service. These end users
                  shall receive the same services provided through LSP at the
                  time of transfer. SWBT shall inform the Commission and the end
                  user's IXC(s) of Record of the names of all end users
                  transferred through this process. Applicable service
                  establishment charges for switching end users from LSP to SWBT
                  shall be assessed to LSP.

         6.7      Within five (5) days of the transfer (fifty (50) days past
                  LSP's due date), SWBT shall notify all affected end users that
                  because of an LSP's failure to pay, their service is now being
                  provided by SWBT. SWBT shall also notify the end user that
                  they have thirty (30) days to select a local service provider.

         6.8      SWBT may discontinue service to LSP upon failure to pay
                  undisputed charges as provided in this section, and shall have
                  no liability to LSP or LSP end users in the event of such
                  disconnection.

         6.9      If any end user fails to select a local service provider
                  within thirty (30) days of the change of providers (eighty
                  (80) days past LSP's due date), SWBT shall terminate the end
                  user's service. SWBT shall notify the Commission and the end
                  user's IXC of Record of the names of all end users whose
                  service has been terminated. The end user shall be responsible
                  for any and all charges incurred during the selection period.

         6.10     Nothing herein shall be interpreted to obligate SWBT to
                  continue to provide service to any such end users. Nothing
                  herein shall be interpreted to limit any and all disconnection
                  rights SWBT may have with regard to such end users.

         6.11     After disconnect procedures have begun, SWBT shall not accept
                  service orders from LSP until all unpaid charges are paid.
                  SWBT shall have the right to require a deposit equal to one
                  month's charges (based on the highest previous month of
                  service from SWBT) prior to resuming service to LSP after
                  disconnect for nonpayment.

<PAGE>   247

EXHIBIT A

              SOUTHWESTERN BELL'S RESALE PRODUCT* LIST - RESIDENCE
                                    ARKANSAS
<TABLE>
<CAPTION>
                                                                             AVOIDED COST DISCOUNTS
                                                                        RECURRING           NON-RECURRING
                                                                        ---------           -------------
<S>                                                                       <C>                   <C>
LOCAL EXCHANGE SERVICE
Life Line and Link Up America Services                                    14.5%                 14.5%
Residence 1 Party                                                         14.5%                 14.5%
Residence Measured                                                        14.5%                 14.5%

EXPANDED LOCAL CALLING
Mandatory Extended Area Service (EAS)- 1 Party                            14.5%                 14.5%
Optional EAS - Metroplus 1 Party                                          14.5%                 14.5%

CALL MANAGEMENT SERVICES                                                  14.5%                 14.5%
Auto Redial                                                               14.5%                 14.5%
Auto Redial - Usage Sensitive                                             14.5%                 14.5%
Call Blocker                                                              14.5%                 14.5%
Call Forwarding                                                           14.5%                 14.5%
Call Forwarding - Busy Line                                               14.5%                 14.5%
Call Forwarding - Busy Line/Don't Answer                                  14.5%                 14.5%
Call Forwarding - Don't Answer                                            14.5%                 14.5%
Call Return                                                               14.5%                 14.5%
Call Return -  Usage Sensitive                                            14.5%                 14.5%
Call Trace                                                                14.5%                 14.5%
Call Waiting                                                              14.5%                 14.5%
Calling Name                                                              14.5%                 14.5%
Calling Number                                                            14.5%                 14.5%
ComCall(R)                                                                14.5%                 14.5%
Personalized Ring (1 dependent number)                                    14.5%                 14.5%
Personalized Ring (2 dependent numbers - 1st number                       14.5%                 14.5%
Personalized Ring (2 dependent numbers - 2nd number                       14.5%                 14.5%
Priority Call                                                             14.5%                 14.5%
Remote Access to Call Forwarding                                          14.5%                 14.5%
Selective Call Forwarding                                                 14.5%                 14.5%
Simultaneous Call Forwarding                                              14.5%                 14.5%
Speed Calling 8                                                           14.5%                 14.5%
Three Way Calling                                                         14.5%                 14.5%



DIRECTORY ASSISTANCE SERVICES                                             14.5%                 14.5%

ISDN
Digiline(sm)                                                              14.5%                 14.5%
</TABLE>

*Some products not available in all areas.
 Resale products available subject to state and federal rules, regulations and
 tariffs.

<PAGE>   248

EXHIBIT A

              SOUTHWESTERN BELL'S RESALE PRODUCT* LIST - RESIDENCE
                                    ARKANSAS

<TABLE>
<CAPTION>
                                                                             AVOIDED COST DISCOUNTS
                                                                        RECURRING           NON-RECURRING
                                                                        ---------           -------------
<S>                                                                       <C>                   <C>
OTHER
Customer Alerting Enablement                                              14.5%                 14.5%
Grandfathered Services                                                    14.5%                 14.5%
Hot Line                                                                  14.5%                 14.5%
Hunting                                                                   14.5%                 14.5%
Intercept Referral Service                                                14.5%                 14.5%
Local Operator Assistance Service                                         14.5%                 14.5%
Packages                                                                  14.5%                 14.5%
Promotions (Greater than 90 Days)                                         14.5%                 14.5%
Preferred Number Service                                                  14.5%                 14.5%
Toll Restriction                                                          14.5%                 14.5%
Voice Dial                                                                14.5%                 14.5%
Warm Line                                                                 14.5%                 14.5%

TOLL
900 Call Restriction                                                      14.5%                 14.5%
Billed Number Screening                                                   14.5%                 14.5%
Home 800(sm)                                                              14.5%                 14.5%
IntraLATA MTS                                                             14.5%                 14.5%
InWats 800                                                                14.5%                 14.5%

NON-TELECOMMUNICATION SERVICES
Bill Plus(sm)                                                             14.5%                 14.5%
Consolidated Billing                                                      14.5%                 14.5%
Company Initiated Suspension and Restoral Service                          0.0%                  0.0%
Customer Initiated Suspension and Restoral Service                         0.0%                  0.0%
Enhanced Directory Listings                                               14.5%                 14.5%
</TABLE>




*Some products not available in all areas.
 Resale products available subject to state and federal rules, regulations and
 tariffs.

<PAGE>   249

EXHIBIT B

               SOUTHWESTERN BELL'S RESALE PRODUCT* LIST - BUSINESS
                                    ARKANSAS

<TABLE>
<CAPTION>
                                                                             AVOIDED COST DISCOUNTS
                                                                        RECURRING           NON-RECURRING
                                                                        ---------           -------------
<S>                                                                       <C>                   <C>
LOCAL EXCHANGE SERVICE
Business 1 Party                                                          14.5%                 14.5%
Business - Multi-Line                                                     14.5%                 14.5%
Business - PBX Trunk                                                      14.5%                 14.5%
Business - Measured                                                       14.5%                 14.5%
Semi Public Coin Telephone Service                                        14.5%                 14.5%

EXPANDED LOCAL CALLING
Extended Area Service (Mandatory EAS)                                     14.5%                 14.5%
Mandatory Extended Area Service (EAS)- 1 Party                            14.5%                 14.5%
Mandatory EAS - PBX Trunk                                                 14.5%                 14.5%
Mandatory EAS - Semi Public                                               14.5%                 14.5%
Optional EAS - Metroplus 1 Party                                          14.5%                 14.5%
Optional EAS - Metroplus Multiline/PBX                                    14.5%                 14.5%


CALL MANAGEMENT SERVICES   
Auto Redial                                                               14.5%                 14.5%
Auto Redial - Usage Sensitive                                             14.5%                 14.5%
Call Blocker                                                              14.5%                 14.5%
Call Forwarding                                                           14.5%                 14.5%
Call Forwarding - Busy Line                                               14.5%                 14.5%
Call Forwarding - Busy Line/Don't Answer                                  14.5%                 14.5%
Call Forwarding - Don't Answer                                            14.5%                 14.5%
Call Return                                                               14.5%                 14.5%
Call Return -  Usage Sensitive                                            14.5%                 14.5%
Call Trace                                                                14.5%                 14.5%
Call Waiting                                                              14.5%                 14.5%
Calling Name                                                              14.5%                 14.5%
Calling Number                                                            14.5%                 14.5%
ComCall(R)                                                                14.5%                 14.5%
Personalized Ring (1 dependent number)                                    14.5%                 14.5%
Personalized Ring (2 dependent numbers - 1st number)                      14.5%                 14.5%
Personalized Ring (2 dependent numbers - 2nd number)                      14.5%                 14.5%
Priority Call                                                             14.5%                 14.5%
Remote Access to Call Forwarding                                          14.5%                 14.5%
Selective Call Forwarding                                                 14.5%                 14.5%
Simultaneous Call Forwarding                                              14.5%                 14.5%
Speed Calling 8                                                           14.5%                 14.5%
Speed Calling 30                                                          14.5%                 14.5%
Three Way Calling                                                         14.5%                 14.5%
</TABLE>

*Some products not available in all areas.
 Resale products available subject to state and federal rules, regulations and
 tariffs.

<PAGE>   250

EXHIBIT B

               SOUTHWESTERN BELL'S RESALE PRODUCT* LIST - BUSINESS
                                    ARKANSAS
<TABLE>
<CAPTION>
                                                                             AVOIDED COST DISCOUNTS
                                                                        RECURRING           NON-RECURRING
                                                                        ---------           -------------
<S>                                                                       <C>                   <C>
AIN
Area Wide Networking                                                      14.5%                 14.5%
Caller Intellidata(R)                                                     14.5%                 14.5%
Disaster Routing Service                                                  14.5%                 14.5%
Intelligent Redirect(sm)                                                  14.5%                 14.5%
IntelliNumber(sm)                                                         14.5%                 14.5%
Positive ID                                                               14.5%                 14.5%

DID
DID (First Block of 100 - Category 1)                                     14.5%                 14.5%

DID (First Block of 10 - Category 1)                                      14.5%                 14.5%
DID (Ea.adl. block of 10 after first 10 - Category 1)                     14.5%                 14.5%
DID (Ea. adl. block of 100 after first 100 - Category 2)                  14.5%                 14.5%
DID (with dial pulse)                                                     14.5%                 14.5%
DID (with Multifrequency)                                                 14.5%                 14.5%
DID (with Dual-Tone Multifrequency)                                       14.5%                 14.5%
DID (1st 10 Trunks or access lines)                                       14.5%                 14.5%
DID (11th thru 50th trunk or network access lines)                        14.5%                 14.5%
DID (51st trunk or network access line)                                   14.5%                 14.5%

TRUNKS
Trunk                                                                     14.5%                 14.5%

OTHER
Customer Alerting Enablement                                              14.5%                 14.5%
Grandfathered Services                                                    14.5%                 14.5%
Hot Line                                                                  14.5%                 14.5%
Hunting                                                                   14.5%                 14.5%
Intercept Referral Service                                                14.5%                 14.5%
Local Operator Assistance Service                                         14.5%                 14.5%
Night Number associated with Telephone Number                             14.5%                 14.5%
Night Number associated with a Terminal                                   14.5%                 14.5%
Packages                                                                  14.5%                 14.5%
Promotions (Greater than 90 Days)                                         14.5%                 14.5%
Telebranch (R)                                                            14.5%                 14.5%
Toll Restriction                                                          14.5%                 14.5%
Voice Dial                                                                14.5%                 14.5%
Warm Line                                                                 14.5%                 14.5%

ISDN
Digiline(sm)                                                              14.5%                 14.5%
Digital Loop Service                                                      14.5%                 14.5%
Select Video Plus(R)                                                      14.5%                 14.5%
Smart Trunk(sm)                                                           14.5%                 14.5%
</TABLE>


*Some products not available in all areas.
 Resale products available subject to state and federal rules, regulations and
 tariffs.

<PAGE>   251

EXHIBIT B

               SOUTHWESTERN BELL'S RESALE PRODUCT* LIST - BUSINESS
                                    ARKANSAS

<TABLE>
<CAPTION>
                                                                             AVOIDED COST DISCOUNTS
                                                                        RECURRING           NON-RECURRING
                                                                        ---------           -------------
<S>                                                                       <C>                   <C>

DIRECTORY ASSISTANCE SERVICES                                             14.5%                 14.5%

TOLL
900 Call Restriction                                                      14.5%                 14.5%
IntraLATA MTS                                                             14.5%                 14.5%
MaxiMizer 800(R)                                                          14.5%                 14.5%
OutWATS 800                                                               14.5%                 14.5%

PLEXAR(R)
Plexar I(R)                                                               14.5%                 14.5%
Plexar II(R)                                                              14.5%                 14.5%

PRIVATE LINE
Analog Private Lines                                                      14.5%                 14.5%
DOVLink                                                                   14.5%                 14.5%
Frame Relay                                                               14.5%                 14.5%
MegaLink I(R)                                                             14.5%                 14.5%
MegaLink II(R)                                                            14.5%                 14.5%
MegaLink III(R)                                                           14.5%                 14.5%
MicroLink I(R)                                                            14.5%                 14.5%


NON-TELECOMMUNICATION SERVICES
Bill Plus(sm)                                                             14.5%                 14.5%
Consolidated Billing                                                      14.5%                 14.5%
Company Initiated Suspension and Restoral Service                          0.0%                  0.0%
Customer Initiated Suspension and Restoral Service                         0.0%                  0.0%
Enhanced Directory Listings                                               14.5%                 14.5%
</TABLE>



*Some products not available in all areas.
 Resale products available subject to state and federal rules, regulations and
 tariffs.

<PAGE>   252

                                                     APPENDIX RESALE - EXHIBIT C
                                                                     PAGE 1 OF 1

                           APPENDIX RESALE - EXHIBIT C
                                    ARKANSAS
                   OS/DA PRICING - BRANDING, RATE & REFERENCE

The following rates will apply for each service element:

<TABLE>
         <S>                                                                         <C>
         A.       CALL BRANDING

         An initial non-recurring charge applies per TOPS switch, per brand for
         the establishment of LSP specific Call Branding. A Per Call charge also
         applies. When there are subsequent changes to the branding
         announcement, an additional non-recurring charge will also apply per
         change.

                                                     Rate per initial load group     $2,230.00
                                                  Rate per load for Brand change     $2,230.00
                                                                        Per Call       $0.02

         B.       DIRECTORY ASSISTANCE RATE/REFERENCE INFORMATION

         An initial non-recurring charge applies per TOPS switch for the initial
         load of LSP's DA Services Rate/Reference Information. An additional
         non-recurring charge applies for each subsequent change to
         Rate/Reference Information.

                                                           Rate per initial load     $3,550.00
                                                 Rate per subsequent rate change     $2,575.00
                                            Rate per subsequent reference change     $2,575.00

         C.       OPERATOR SERVICES RATE/REFERENCE INFORMATION

         An initial non-recurring charge applies per TOPS switch for the initial
         load of LSP's Operator Services Rate/Reference Information. An
         additional non-recurring charge applies for each subsequent change to
         Rate/Reference Information.

                                                           Rate per initial load     $3,550.00
                                                 Rate per subsequent rate change     $2,575.00
                                            Rate per subsequent reference change     $2,575.00
</TABLE>


<PAGE>   253
                                                                    APPENDIX UNE
                                                                    Page 2 of 16


                   APPENDIX: UNBUNDLED NETWORK ELEMENTS (UNE)

I.       Introduction

         A.       This Appendix Unbundled Network Elements to the Agreement sets
                  forth the unbundled Network Elements that SWBT agrees to offer
                  to LSP. The specific terms and conditions that apply to the
                  unbundled Network Elements are described below. The prices for
                  Network Elements are set forth in Appendix Pricing Schedule.

II.      General Terms and Conditions

         A.       SWBT and LSP may agree to connect LSP's facilities with SWBT's
                  network at any technically feasible point for access to
                  unbundled Network Elements for the provision by LSP of a
                  Telecommunications Service. Unbundled Network Elements may not
                  be connected to or combined with SWBT access services or other
                  SWBT tariffed service offerings with the exception of tariffed
                  collocation services.

         B.       SWBT will provide LSP access to the unbundled Network Elements
                  to permit LSP to combine such Network Elements with other
                  Network Elements obtained from SWBT or with network components
                  provided by itself to provide Telecommunications Services to
                  its customers, provided that such combination is technically
                  feasible and would not impair the ability of other carriers to
                  obtain access to other unbundled network elements or to
                  interconnect with SWBT's network. Any request by LSP for SWBT
                  to provide a type of connection between Network Elements that
                  is not currently being utilized in the SWBT network and is not
                  otherwise provided for under this Agreement will be made in
                  accordance with the Bona Fide Request process described in
                  Section III. 

         C.       When LSP orders unbundled network elements, SWBT will perform
                  the functions necessary to combine unbundled network elements
                  in any manner required by law, even if those elements are not
                  ordinarily combined in SWBT's network, provided that such
                  combination is a) technically feasible; and b) would not
                  impair the ability of other carriers to obtain access to
                  unbundled network elements or to interconnect with SWBT's
                  network as provided in F.C.C. Rule 51.315 (c).

         D.       LSP is responsible to designate each network element being 
                  ordered from SWBT and how those network elements are to be
                  combined. Where multiple SWBT network elements are to be
                  combined, LSP must designate the order in which the elements
                  are to be connected. Where SWBT network elements are to be
                  connected to another carrier's network element(s), LSP will
                  designate how SWBT network element(s) are to be connected
                  (i.e., cross connected) to the network element(s) of the other
                  telecommunications carrier.

<PAGE>   254

                                                                    APPENDIX UNE
                                                                    Page 3 of 16


         E.       Various subsections below list the Network Elements that LSP 
                  and SWBT have identified as of the Effective Date of this
                  Agreement. SWBT will upon request of LSP and to the extent
                  technically feasible provide LSP additional Network Elements
                  or modifications to previously identified Network Elements for
                  the provision by LSP of a Telecommunications Service. Such
                  requests will be processed in accordance with the Bona Fide
                  Request process.

         F.       Unbundled Network Elements are provided under this agreement 
                  over such routes, technologies, and facilities as SWBT may
                  elect at its own discretion. If LSP requests special
                  facilities, equipment or routing of unbundled network elements
                  such requests will be handled under the Bona Fide Request
                  process.

         G.       Subject to the terms herein, SWBT is responsible only for the 
                  installation, operation and maintenance of the Network
                  Elements it provides. SWBT is not otherwise responsible for
                  the Telecommunications Services provided by LSP through the
                  use of those elements.

         H.       Where unbundled elements provided to LSP are dedicated to a
                  single end user, if such elements are for any reason
                  disconnected they will be made available to SWBT for future
                  provisioning needs. The LSP agrees to relinquish control of
                  any such unbundled element concurrent with the disconnection
                  of a LSPs end user's service. 

         I.       The Parties acknowledge that the Commission may decline to 
                  require unbundling of Network Elements beyond those identified
                  in 47 CFR Section 51.319 if the Commission concludes that: (1)
                  such Network Element is proprietary or contains proprietary
                  information that will be revealed if such Network Element is
                  provided to LSP on an unbundled basis, and LSP could offer the
                  same proposed Telecommunications Service through the use of
                  other, nonproprietary Network Elements within SWBT's network;
                  or (2) the Commission concludes that the failure of SWBT to
                  provide access to such Network Element would not decrease the
                  quality of, and would not increase the financial or
                  administrative cost of, the Telecommunications Service LSP
                  seeks to offer, compared with providing that service over
                  other unbundled Network Elements in SWBT's network.

         J.       LSP will, upon request of SWBT, and to the extent technically
                  feasible, provide SWBT access to Network Elements for the
                  provision of SWBT's telecommunications services in accordance
                  with the Act. Such request by SWBT will be processed in
                  accordance with the Bona Fide Request process.

         K.       Each Party is solely responsible for the services it provides 
                  to its end users and to other Telecommunications Carriers.

<PAGE>   255

                                                                    APPENDIX UNE
                                                                    Page 4 of 16


         L.       Network elements provided to LSP under the provisions of this 
                  Appendix will remain the property of SWBT. 

         M.       SWBT will provide network elements where technically feasible.
                  Where facilities and equipment are not available, LSP may
                  request and, to the extent required by law and as SWBT may
                  otherwise agree, SWBT may provide Network Elements through the
                  Bona Fide Request process.

         N.       The elements provided pursuant to this Agreement will be 
                  available to SWBT at times mutually agreed upon in order to
                  permit SWBT to make tests and adjustments appropriate for
                  maintaining the services in satisfactory operating condition.
                  No credit will be allowed for any interruptions involved
                  during such tests and adjustments.

         O.       LSP's use of any SWBT network element, or of its own equipment
                  or facilities in conjunction with any SWBT network element,
                  will not materially interfere with or impair service over any
                  facilities of SWBT, its affiliated companies or its connecting
                  and concurring carriers involved in its services, cause damage
                  to their plant, impair the privacy of any communications
                  carried over their facilities or create hazards to the
                  employees of any of them or the public. Upon reasonable
                  written notice and opportunity to cure, SWBT may discontinue
                  or refuse service if LSP violates this provision. 

         P.       When converting a SWBT account to an LSP account or between
                  LSP and another provider, the conversion will be handled as a
                  disconnect of the current account and a new connect of the
                  unbundled network elements account.

         Q.       Performance of Network Elements

                  1.       Each  Network  Element  provided  by SWBT to LSP  
                           will meet applicable regulatory performance standards
                           and be at least equal in quality and performance as
                           that which SWBT provides to itself. Each Network
                           Element will be provided in accordance with SWBT
                           Technical Publications or other written descriptions,
                           if any, as changed from time to time by SWBT at its
                           sole discretion. LSP may request, and SWBT will
                           provide, to the extent technically feasible, Network
                           Elements that are superior or lesser in quality than
                           SWBT provides to itself and such service will be
                           requested pursuant to the Bona Fide Request process.

                  2.       Nothing in this Agreement will limit either Party's 
                           ability to modify its network through the
                           incorporation of new equipment, new software or
                           otherwise. Each Party will provide the other Party
                           written notice of any such upgrades in its network
                           which will materially impact the other Party's
                           service consistent with the timelines established by
                           the FCC in the Second Report and Order, CC Docket
                           96-98. LSP will be solely responsible, at its own

<PAGE>   256

                                                                    APPENDIX UNE
                                                                    Page 5 of 16


                           expense, for the overall design of its
                           telecommunications services and for any redesigning
                           or rearrangement of its telecommunications services
                           which may be required because of changes in
                           facilities, operations or procedure of SWBT, minimum
                           network protection criteria, or operating or
                           maintenance characteristics of the facilities. 

         R.       LSP will connect equipment and facilities that are compatible
                  with the SWBT Network Elements and will use Network Elements 
                  in accordance with the applicable regulatory standards and 
                  requirements referenced in paragraph II, Q.

III.     Bona Fide Request

         A.       Sections IV - XI below identify specific unbundled Network
                  Elements and provide the terms and conditions on which SWBT
                  will offer them to LSP. Any request by LSP for an additional
                  unbundled Network Element, or modifications to previously
                  identified Network Elements, both to the extent technically
                  feasible, will be considered under this Bona Fide Request
                  process. Where facilities and equipment are not available, LSP
                  may request and SWBT may agree to provide, Network Elements
                  through the Bona Fide Request process.

         B.       Each Party will promptly consider and analyze access to new
                  unbundled Network Element with the submission of a Network
                  Element Bona Fide Request hereunder. The Network Element Bona
                  Fide Request process set forth herein does not apply to those
                  services requested pursuant to Report & Order and Notice of
                  Proposed Rulemaking 91-141 (rel. Oct. 19, 1992) paragraph 259
                  and n. 603 and subsequent rulings.

         C.       A Network Element Bona Fide Request will be submitted in 
                  writing and will include a technical description of each
                  requested Network Element, the date when interconnection is
                  requested and the projected quantity of interconnection points
                  ordered with a demand forecast.

         D.       The requesting Party may cancel a Network Element Bona Fide 
                  Request at any time, but will pay the other Party's reasonable
                  and demonstrable costs of processing and/or implementing the
                  Network Element Bona Fide Request up to the date of
                  cancellation.

         E.       Within ten (10) business days of its receipt, the receiving 
                  Party will acknowledge receipt of the Network Element Bona
                  Fide Request.

         F.       Except under extraordinary circumstances, within thirty (30)
                  days of its receipt of a Network Element Bona Fide Request,
                  the receiving Party will provide to the requesting Party a
                  preliminary analysis of such Network Element Bona Fide
                  Request. The preliminary analysis will confirm that the
                  receiving Party will offer access to the Network Element or
                  will provide a detailed explanation that access to the Network
                  Element is not 

<PAGE>   257
                                                                    APPENDIX UNE
                                                                    Page 6 of 16

                  technically feasible and/or that the request does not qualify
                  as a Network Element that is required to be provided under the
                  Act.

         G.       If the receiving Party determines that the Network Element 
                  Bona Fide Request is technically feasible and otherwise
                  qualifies under the Act, it will promptly proceed with
                  developing the Network Element Bona Fide Request upon receipt
                  of written authorization from the requesting Party. When it
                  receives such authorization, the receiving Party shall
                  promptly develop the requested services, determine their
                  availability, calculate the applicable prices and establish
                  installation intervals.

         H.       Unless the Parties otherwise agree, the Network Element Bona 
                  Fide Request must be priced in accordance with Section
                  252(d)(1) of the Act.

         I.       As soon as feasible, but not more than ninety (90) days
                  after its receipt of authorization to proceed with developing
                  the Network Element Bona Fide Request, the receiving Party
                  shall provide to the requesting Party a Network Element Bona
                  Fide Request quote which will include, at a minimum, a
                  description of each Network Element, the availability, the
                  applicable rates and the installation intervals.

         J.       Within thirty (30) days of its receipt of the Network Element
                  Bona Fide Request quote, the requesting Party must either
                  confirm its order for the Network Element Bona Fide Request
                  pursuant to the Network Element Bona Fide Request quote or
                  seek arbitration by the Commission pursuant to Section 252 of
                  the Act.

         K.       If a Party to a Network Element Bona Fide Request believes 
                  that the other Party is not requesting, negotiating or
                  processing the Network Element Bona Fide Request in good
                  faith, or disputes a determination, or price or cost quote,
                  such Party may seek mediation or arbitration by the Commission
                  pursuant to Section 252 of the Act.

IV.      Network Interface Device

         A.       The Network Interface Device (NID) is a cross-connect used to
                  connect loop facilities to inside wiring. The fundamental
                  function of the NID is to establish the official network
                  demarcation point between a carrier and its end-user customer.
                  The NID contains the appropriate and accessible connection
                  points or posts to which the service provider and the end-user
                  customer each make its connections.

         B.       LSP may connect to the customer's inside wire at the SWBT NID,
                  as is, at no charge. Any repairs, upgrade and rearrangements
                  required by LSP will be performed by SWBT based on time and
                  material charges.

         C.       LSP will provide its own NID and will interface to the 
                  customer's premises wiring through connections in the customer
                  chamber of the SWBT NID.

<PAGE>   258

                                                                    APPENDIX UNE
                                                                    Page 7 of 16


         D.       With respect to multiple dwelling units or multiple-unit 
                  business premises, LSP will provide its own NID, will connect
                  directly with the customer's inside wire and will not require
                  any connection to the SWBT NID, unless such premises are
                  served by "single subscriber" type NIDs.

         E.       The SWBT NIDs that LSP uses under this Appendix will be those 
                  installed by SWBT to serve its customers. 

         F.       LSP will not attach to or disconnect SWBT's ground. LSP will 
                  not cut or disconnect SWBT's loop from its protector. LSP will
                  not cut any other leads in the NID. LSP will protect all
                  disconnected leads with plastic sleeves and will store them
                  within the NID enclosure. LSP will tighten all screws or lugs
                  loosened by LSP in the NID's enclosure and replace all
                  protective covers.

V.       Local Loop

         A.       A "loop" is a dedicated transmission facility between a
                  distribution frame (or its equivalent) in a SWBT central
                  office and an end user customer premises.

         B.       SWBT will provide at the rates, terms, and conditions set out
                  in Appendix Pricing Schedule the following:

                  1.       The 2-Wire analog loop supports analog voice 
                           frequency, voice band services with loop start
                           signaling within the frequency spectrum of 
                           approximately 300 Hz and 3000 Hz.

                  2.       SWBT will offer 5 dB conditioning on a 2-wire analog
                           loop as the standard conditioning option available.

                  3.       The 4-Wire analog loop provides a non-signaling voice
                           band frequency spectrum of approximately 300 Hz to
                           3000 Hz.  The 4-Wire analog loop provides separate 
                           transmit and receive paths. 

                  4.       The 2-Wire digital loop 160 Kbps supports Basic Rate
                           ISDN (BRI) digital exchange services. The 2-Wire 
                           digital loop 160 Kbps supports usable bandwidth up
                           to 160 Kbps. 

                  5.       The 4-Wire digital loop 1.544 Mbps will support DS1
                           service including Primary Rate ISDN (PRI). The 4-wire
                           digital loop 1.544 Mbps supports usable bandwidth up 
                           to 1.544 Mbps. 

         C.       If LSP requests one or more unbundled Loops serviced by 
                  Integrated Digital Loop Carrier (IDLC) or Remote Switching
                  technology, SWBT will, where available, move the requested
                  unbundled Loop(s) to a spare, existing physical or a universal
                  digital loop carrier unbundled Loop at no additional charge to
                  LSP. If, however, no spare unbundled Loop is available, SWBT
                  will within two business days, excluding weekends and
                  holidays, of LSP's request notify LSP of the lack of

<PAGE>   259

                                                                    APPENDIX UNE
                                                                    Page 8 of 16

                  available facilities. LSP may request alternative arrangements
                  through the Bona Fide Request process.

         D.       In addition to any liability provisions in this agreement,
                  SWBT does not guarantee or make any warranty with respect to
                  unbundled loops when used in an explosive atmosphere. LSP will
                  indemnify, defend and hold SWBT harmless from any and all
                  claims by any person relating to LSP's or LSP end user's use
                  of unbundled loops in an explosive atmosphere.

VI.      Local Switching

         A.       The local switching element encompasses  line-side and trunk
                  side facilities plus the features, functions and capabilities
                  of the switch. The line side facilities include the connection
                  between a loop termination at, for example, a main
                  distribution frame (MDF), and a switch line card. Trunk-side
                  facilities include the connection between, for example, trunk
                  termination at a trunk-side cross-connect panel and a trunk
                  card. The local switching element includes all features,
                  functions, and capabilities of the local switch, including but
                  not limited to the basic switching function of connecting
                  lines to lines, lines to trunks, trunks to lines and trunks to
                  trunks. It also includes the same basic capabilities that are
                  available to SWBT customers, such as a telephone number, dial
                  tone, signaling and access to 911, operator services,
                  directory assistance, and features and functions necessary to
                  provide services required by law. In addition, the local
                  switching element includes all vertical features that the
                  switch is capable of providing, including custom calling,
                  CLASS features, and centrex-like capabilities.

         B.       SWBT will route InterLATA calls as defined by the exchange 
                  dialing plan via the existing PIC process when LSP uses Local
                  Switching elements. Until such time that the commission
                  mandates intraLATA presubscription, SWBT will route IntraLATA
                  Toll calls as defined by the exchange dialing plan when LSP
                  uses Local Switching elements and will provide intraLATA toll
                  to LSP without other usage sensitive charges. When the
                  commission mandates intraLATA presubscription, SWBT will route
                  IntraLATA Toll calls to the presubscribed carrier.

         C.       When LSP requests Unbundled Common Transport, SWBT's Local 
                  Switching element will route local calls on SWBT's common
                  network to the appropriate trunk or lines for call origination
                  or termination.

         D.       SWBT will provide the Local Switching element only with 
                  standard central office treatments (e.g., busy tones, vacant
                  codes, fast busy, etc.), supervision and announcements.

         E.       SWBT will control congestion points such as those caused by 
                  radio station call-ins, and network routing abnormalities,
                  using capabilities such as Automatic Call Gapping, Automatic
                  Code Gapping, Automatic 

<PAGE>   260

                                                                    APPENDIX UNE
                                                                    Page 9 of 16

                  Congestion Control, and Network Routing Overflow. LSP agrees
                  to respond to SWBT's notifications regarding network
                  congestion.

         F.       SWBT will provide switch interfaces to adjuncts in the same
                  manner it provides them to itself. LSP requests for use of
                  SWBT adjuncts will be handled through the Bona Fide Request
                  process.

         G.       SWBT will allow LSP to designate the features and functions 
                  that are activated on a particular unbundled switch port to
                  the extent such features and functions are available or as may
                  be requested by the Bona Fide Request process.

         H.       Switch Ports

                  1.       Analog Line Port: A line side switch connection
                           available in either a loop or ground start signaling
                           configuration used primarily for Switched voice
                           communications.

                  2.       Analog (DID) Trunk Port:  A trunk side switch 
                           connection used for voice communications via customer
                           premises equipment primarily provided by a Private
                           Branch Exchange (PBX) switch.

                  3.       ISDN Basic Rate Interface (BRI) Port:  A line side
                           switch connection which provides ISDN Basic Rate
                           Interface (BRI) based capabilities.

                  4.       ISDN Primary Rate Interface (PRI) Trunk Side Port:
                           trunk side switch connection which provides Primary
                           Rate Interface (PRI) ISDN Exchange Service
                           capabilities.

VII.     Tandem Switching

         A.       Tandem Switching is defined as: (1) trunk-connect facilities,
                  including but not limited to the connection between trunk
                  termination at a cross-connect panel and a switch trunk card,
                  (2) the basic switching function of connecting trunks to
                  trunks; and (3) all technically feasible functions that are
                  centralized in tandem switches (as distinguished from separate
                  end-office switches), including but not limited to call
                  recording, the routing of calls to operator services, and
                  signaling conversion features.

         B.       Tandem Switching will provide trunk to trunk connections for
                  local calls between two end offices. 

         C.       To the extent all signaling is SS7, Tandem Switching will 
                  preserve CLASS/LASS features and Caller ID as traffic is
                  processed. Additional signaling information and requirements
                  are provided in Section IX.

VIII.    Interoffice Transport

         A.       The Interoffice Transport network element is defined as SWBT
                  interoffice transmission facilities dedicated to a particular
                  customer or carrier, or shared by more than one customer or
                  carrier, that provide 


<PAGE>   261

                                                                    APPENDIX UNE
                                                                   Page 10 of 16


                  telecommunications between wire centers owned by SWBT or LSP,
                  or between switches owned by SWBT or LSP. Interoffice
                  Transport includes Common Transport and Dedicated Transport.

         B.       SWBT will be responsible for the engineering, provisioning,
                  and maintenance of the underlying equipment and facilities
                  that are used to provide Interoffice Transport.

         C.       Common Transport - Common Transport is a shared interoffice
                  transmission path between SWBT switches. Common Transport will
                  permit LSP to connect its Unbundled Local Switching element
                  purchased from SWBT with Common Transport to transport the
                  local call dialed by the Unbundled Local Switching element to
                  its destination through the use of SWBT's common transport
                  network. Common Transport will also permit LSP to utilize
                  SWBT's common network between a SWBT tandem and a SWBT end
                  office.

         D.       Dedicated Transport

                  1.       Dedicated Transport is an interoffice transmission
                           path dedicated to a particular customer or carrier
                           that provides telecommunications between wire centers
                           owned by SWBT or LSP, or between switches owned by
                           SWBT or LSP.

                  2.       SWBT will offer Dedicated Transport as a circuit 
                           (e.g., DS1, DS3) dedicated to LSP. 

                  3.       SWBT will provide Dedicated Transport at the 
                           following speeds: DS1 (1.544 Mbps), DS3 (45 Mbps),
                           OC3 (155.520 Mbps) and OC12 (622.080 Mbps). In
                           addition, SWBT offers OC48 (2488.320 Mbps) bandwidth
                           as an option for interoffice capacity.

                  4.       In addition to any liability provisions in this
                           agreement, SWBT does not guarantee or make any
                           warranty with respect to entrance facilities when
                           used in an explosive atmosphere. LSP will indemnify,
                           defend and hold SWBT harmless from any and all claims
                           by any person relating to LSP's or LSP end user's use
                           of unbundled loops in an explosive atmosphere.

         E.       Digital Cross-Connect System (DCS) - SWBT will offer Digital
                  Cross-Connect System (DCS) in conjunction with the unbundled
                  dedicated transport element with the same functionality that
                  is offered to interexchange carriers.

IX.      Signaling Networks and Call-Related Databases - Signaling Networks and
         Call-Related Databases are Network Elements that includes Signaling
         Link Transport, Signaling Transfer Points, and Service Control Points
         and Call-Related Databases. Access to SWBT's signaling network and call
         related databases will be provided as described in the following
         Appendices: SS7, LIDB Validation, LIDB, CNAM, 800, and AIN.

<PAGE>   262

                                                                    APPENDIX UNE
                                                                   Page 11 of 16

X.       Operations Support Systems Functions

         A.       Operations Support Systems Functions consist of pre-ordering,
                  ordering, provisioning, maintenance and repair, and billing
                  functions supported by SWBT's databases and information.

         B.       SWBT will provide LSP access to its Operations Support Systems
                  Functions as outlined in Appendix OSS.

XI.      Cross Connects

         A.       The cross connect is the media between the SWBT distribution
                  frame and an LSP designated collocation or to other SWBT
                  unbundled network elements purchased by LSP.

         B.       SWBT offers a choice of four types of cross connects with each
                  unbundled loop type. The applicable cross connects are as
                  follows:

                  1.       Cross connect to DCS

                  2.       Cross connect to MUX

                  3.       Cross connect to Collocation

                  4.       Cross connect to Switch Port

         C.       Cross connects must also be ordered with Unbundled Dedicated 
                  Transport (UDT).

                  1.       The LSP must specify when placing an UDT order, in
                           what order the unbundled network components are to be
                           connected.

                  2.       The Cross Connect being requested must have a
                           compatible interface to each of the elements which 
                           the Cross Connect is joining together.

                  3.       The following cross connects are available with UDT:

                           a)       Voice Grade 2-Wire
                           b)       Voice Grade 4-Wire
                           c)       DS0 - DCS to Collocation
                           d)       DS1
                           e)       DS3
                           f)       OC3
                           g)       OC12
                           h)       OC48

XII.     Pricing

         A.       Attached hereto as Appendix Pricing Schedule is a schedule
                  which reflects the prices at which SWBT agrees to furnish
                  Unbundled Network Elements to LSP. LSP agrees to compensate
                  SWBT for unbundled Network elements at the rates contained in
                  this Appendix. Unbundled Network Elements are available from
                  SWBT on a per unbundled Network Element basis at prices as
                  contained in Appendix Pricing Schedule.


<PAGE>   263

                                                                    APPENDIX UNE
                                                                   Page 12 of 16


         B.       For any rate element and/or charge contained in or referenced
                  to in this Appendix that are not listed in the attached
                  Appendix Pricing Schedule, including Bona Fide Requests, SWBT
                  and LSP will negotiate prices.

         C.       Unless otherwise stated, SWBT will render a monthly bill for
                  Network Elements provided hereunder. Remittance in full will
                  be due within thirty (30) days of receipt of invoice. Interest
                  will apply on overdue amounts.

         D.       SWBT will recover the costs of modifying its outside plant 
                  facilities for LSP space requirements. These costs will be
                  recovered via the Bona Fide Request process described herein.

         E.       Recurring Charges

                  1.       Unless otherwise listed below, where Rates are shown
                           as monthly, a month will be defined as a calendar
                           month. The minimum term for each monthly rated
                           element will be one (1) month. After the initial
                           month, billing will be on the basis of whole or
                           fractional months used. The minimum service period
                           for elements provided under the Bona Fide Request
                           process may be longer.

                  2.       When an unbundled network element with a minimum
                           period greater than one month is discontinued prior
                           to the expiration of the minimum period, the
                           applicable charge will be the total monthly charges,
                           for the remainder of the minimum period.

                  3.       The minimum service period for unbundled dedicated
                           transport elements is 12 months.

                  4.       Where rates will be based on minutes of use, usage
                           will be accumulated at the end office or other
                           measurement point without any per call rounding and
                           total minutes by end office are rounded to the next
                           higher minute. LSP will pay for all usage on such
                           calls including those that are not completed due to
                           busy or don't answer conditions.

                  5.       Where rates are based on miles, the mileage will be 
                           calculated on the airline distance involved between
                           the locations. To determine the rate to be billed,
                           SWBT will first compute the mileage using the V&H
                           coordinates method, as set forth in the National
                           Exchange Carrier Association, Inc. Tariff F.C.C. No
                           4. When the calculation results in a fraction of a
                           mile, SWBT will round up to the next whole mile
                           before determining the mileage and applying rates.

         F.       Non-Recurring Charges

                  1.       There are non-recurring charges for the first 
                           connection on an LSP order as well as separate
                           non-recurring charges for each additional connection
                           associated with the same LSP order at the same LSP




<PAGE>   264

                                                                    APPENDIX UNE
                                                                   Page 13 of 16


                           specified premises. When converting the SWBT account
                           to LSP or between LSP and another local service
                           provider, the conversion will be handled as a
                           disconnect of the current account and a new connect
                           of the unbundled network element account.

                  2.       LSP will pay a non-recurring charge when an LSP adds
                           or removes a signaling point code. The rates and
                           charges for Signaling Point Code(s) are identified in
                           the Pricing Schedule. This charge also applies to
                           point code information provided by LSP allowing other
                           telecommunications providers to use LSP's SS7
                           signaling network.

                  3.       A service order processing (Service Order) charge 
                           will apply for each service order issued by SWBT to
                           process a request for installation, disconnection,
                           rearrangement, changes to or record orders for
                           unbundled elements.

         G.       Maintenance of Elements

                  1.       The network elements provided by SWBT pursuant to
                           this Appendix will be maintained by SWBT. LSP or
                           others may not rearrange, move, disconnect, remove or
                           attempt to repair any facilities provided by SWBT,
                           other than by connection or disconnection to any
                           interface means used, except with the written consent
                           of SWBT.

                  2.       If trouble occurs with unbundled network elements 
                           provided by SWBT, LSP will first determine whether
                           the trouble is in LSP's own equipment and/or
                           facilities or those of the end user. If LSP
                           determines the trouble is in SWBT's equipment and/or
                           facilities, LSP will issue a trouble report to SWBT.

                  3.       LSP will pay Time and Material charges when LSP 
                           reports a suspected failure of a network element and
                           SWBT dispatches personnel to the end user's premises
                           or a SWBT central office and trouble was not caused
                           by SWBT's facilities or equipment. Time and Material
                           charges will include all technicians dispatched,
                           including technicians dispatched to other locations
                           for purposes of testing.

                  4.       LSP will pay Time and Material charges when SWBT 
                           dispatches personnel and the trouble is in equipment
                           or communications systems provided an entity by other
                           than SWBT or in detariffed CPE provided by SWBT,
                           unless covered under a separate maintenance
                           agreement.

                  5.       If LSP issues a trouble report allowing SWBT access
                           to the end user's premises and SWBT personnel are
                           dispatched but denied access to the premises, then
                           Time and Material charges will apply



<PAGE>   265

                                                                    APPENDIX UNE
                                                                   Page 14 of 16

                           for the period of time that SWBT personnel are
                           dispatched. Subsequently, if SWBT personnel are
                           allowed access to the premises, the charges discussed
                           herein will still apply.

                  6.       Time and Material charges apply on a first and 
                           additional basis for each half hour or fraction
                           thereof. If more than one technician is dispatched in
                           conjunction with the same trouble report, the total
                           time for all technicians dispatched will be
                           aggregated prior to the distribution of time between
                           the "First Half Hour or Fraction Thereof" and "Each
                           Additional Half Hour or Fraction Thereof" rate
                           categories. Basic Time is work related efforts of
                           SWBT performed during normally scheduled working
                           hours on a normally scheduled work day. Overtime is
                           work related efforts of SWBT performed on a normally
                           scheduled work day, but outside of normally scheduled
                           working hours. Premium Time is work related efforts
                           of SWBT performed other than on a normally scheduled
                           work day.

                  7.       If LSP requests or approves a SWBT technician to 
                           perform services in excess of or not otherwise
                           contemplated by the nonrecurring charges herein, LSP
                           will pay for any additional work to perform such
                           services, including requests for installation or
                           conversion outside of normally scheduled working
                           hours.

         H.       Other Pricing Terms and Conditions for Unbundled Local 
                  Switching (ULS)

                  1.       When LSP purchases Unbundled Local Switching, SWBT 
                           will provide LSP the vertical features that the
                           switch is equipped to provide, as part of the usage
                           charges associated with ULS. LSP will pay
                           non-recurring charges to activate such features in
                           association with a particular ULS Port type. There
                           are two levels of non-recurring charges. The first
                           will apply when the features are activated at the
                           same time the port is established. A different
                           non-recurring charge applies when the feature is
                           activated subsequent to initial installation of the
                           port.

                  2.       When the NXX of the telephone number provided to LSP
                           is one associated with an optional EAS arrangement,
                           LSP will pay a flat-rated monthly port additive for
                           the optional EAS toll package(s) inherent in the
                           telephone number.

                  3.       LSP will pay the Toll Free Database query rate for 
                           each query received and processed by SWBT's database.
                           When applicable, the charge for the additional
                           features (Designated 10-Digit Translation, Call
                           Validation and Call Handling and Destination) are per
                           query and in addition to the Toll Free Database query
                           charge, and will also be paid by LSP.


<PAGE>   266

                                                                    APPENDIX UNE
                                                                   Page 15 of 16


                  4.       Use of SWBT's SS7 signaling network will be provided 
                           for unbundled local switching as set forth in
                           Appendix SS7. LSP does not separately order SS7 under
                           this method. LSP will be charged for the use of the
                           SWBT SS7 network on a per call basis when the SS7
                           network is used in conjunction with unbundled local
                           switching.

                  5.       With Unbundled Local Switching, SWBT will make 
                           available features that require resources outside the
                           switch, but LSP will pay additional charges (e.g.,
                           TCAP messages, SS7 Signaling, database queries, etc.)
                           for such features.

                  6.       Associated with Unbundled Local Switching, LSP will 
                           pay a non-recurring and a monthly recurring charge
                           for the establishment of common block for a
                           particular end user served by LSP. LSP will also pay
                           a non-recurring charge for activation of features
                           associated with individual ports and for subsequent
                           changes to features associated with individual ports.
                           These non-recurring charges are separate from the
                           service charges for service order processing.

         I.       Temporary Rate Structure for Unbundled Local Switching (ULS)

                  1.       LSP will be charged a per minute rate for each local 
                           call generated by an unbundled local ULS port, when
                           both the originating and terminating telephone number
                           are in the same 11 digit CLLI end office. When LSP
                           uses a ULS port to initiate a call to a terminating
                           number associated with a different 11 digit CLLI, LSP
                           will pay a rate per minute for ULS plus a rate per
                           minute for UCT transport. The parties agree to assume
                           that SWBT's common transport network is used in this
                           latter case.

         J.       Standard Interim Structure for ULS

                  1.       Intra Switch Calls - On calls originating and
                           terminating in the same switch:

                           a)       LSP will pay ULS-O for a call originating
                                    from an ULS line or trunk port that
                                    terminates to a SWBT end user service line
                                    or any other unbundled line or trunk port
                                    which is connected to the same end office
                                    switch.

                           b)       LSP will pay ULS-O for a centrex-like ULS
                                    intercom call in which the LSP's user dials 
                                    from one centrex-like station to another 
                                    centrex-like station in the same common 
                                    block defined system. 

                           c)       SWBT will not bill ULS-T for calls
                                    originating from a bundled line port (a line
                                    port associated with the provision


<PAGE>   267

                                                                    APPENDIX UNE
                                                                   Page 16 of 16


                                    of resold local service by SWBT, or
                                    associated with local service to SWBT end
                                    user) and terminating to a ULS Port.

                           d)       SWBT will not bill ULS-T for Intraswitch
                                    calls originated by an unbundled ULS port
                                    even when the line to which the call is
                                    terminated is another ULS Port. 

                  2.       Inter Switch Calls - On calls not originating and 
                           terminating in the same switch:

                           a)       When a call originates from an ULS Port and
                                    is routed to SWBT's public network via a
                                    connection to UCT, ULS-O will apply. Charges
                                    for UCT as outlined below will also apply.

                           b)       When an InterLATA toll call is initiated 
                                    from an ULS port it will be routed to the
                                    end user PIC choice. ULS-O usage charges
                                    will apply to LSP in such event.

                           c)       Until IntraLATA Dialing Parity, all 
                                    intraLATA toll calls initiated by ULS Port
                                    will be routed to SWBT. The LSP will pay
                                    IntraLATA toll rates for such calls. No ULS
                                    usage charges will apply to LSP in such
                                    event.

                           d)       After IntraLATA Dialing Parity, IntraLATA 
                                    toll calls from ULS Ports will be routed to
                                    the end user PIC choice. ULS-O charges will
                                    apply.

                           e)       When LSP uses ULS Ports to initiate an 
                                    800/888 call, SWBT will perform the
                                    appropriate database query and route the
                                    call to the indicated IXC. No ULS-O charges
                                    will apply to the ULS Port.

                           f)       When a call that has been routed through 
                                    SWBT's public network terminates to an ULS
                                    Port, from another of the same LSP's ports
                                    or another LSP's ULS Port, ULS-T charges
                                    will apply.

                           g)       When a call that has been routed through
                                    SWBT's public network terminates to an ULS
                                    Port, from the bundled local exchange
                                    service of SWBT, ULS-T charges will apply.

                           h)       When a call terminates to an ULS Port via 
                                    terminating access services provided by SWBT
                                    (e.g., FGA, FGB, FGD, WATS etc.) SWBT will
                                    assess ULS-T charges.

                           i)       When a call which has been routed from
                                    another network terminates to an ULS line
                                    port, ULS-T charges will apply.

<PAGE>   268
                           UNE PRICE LIST - ARKANSAS

<TABLE>
<CAPTION>
                                                                       Monthly/MOU Rates                      Nonrecurring Charge

                                                            Zone A          Zone B          Zone C          Initial      Additional
                                                            ------          ------          ------          -------      ----------
<S>                                                        <C>             <C>             <C>             <C>            <C>
Network Interface Device (NID)                                                                                           
     Disconnect Loop from inside wiring, per NID                 N/A             N/A             N/A         $60.85        $30.45
                                                                                                                          
Unbundled Loops                                                                                                           
     2-Wire Analog                                            $73.05          $32.50          $19.25         $38.05        $15.35
        Conditioning for dB Loss                               $7.75           $7.75           $7.75         $45.05        $16.90
     4-Wire Analog                                           $146.10          $65.00          $38.50         $38.05        $15.35
     2-wire Digital                                          $123.00          $61.40          $43.60        $117.40        $61.60
     4-wire Digital                                          $209.95         $159.60         $137.00        $277.25       $109.35
                                                                                                                          
Loop Cross Connects                                                                                                       
     Analog Loop to Collocation                                                                                           
            2-wire cross connect                               $1.65           $1.65           $1.65         $71.80        $68.35
            4-wire cross connect                               $3.25           $3.25           $3.25         $84.95        $81.50
     Digital Loop to Collocation                                                                                          
            2-wire cross connect                               $1.65           $1.65           $1.65         $71.80        $68.35
            4-wire cross connect                               $8.70           $8.70           $8.70         $84.95        $81.50
     Analog Loop to Multiplexer / Interoffice                                                                             
            2-wire cross connect                               $4.50           $4.50           $4.50        $105.45        $96.95
            4-wire cross connect                               $6.10           $6.10           $6.10        $123.70       $115.20
     Digital Loop to Multiplexer / Interoffice                                                                            
            2-wire cross connect                               10.85          $10.85          $10.85        $105.45        $96.95
     Analog Loop to DCS / Switch Port                                                                                     
            2-wire cross connect                                  NC              NC              NC             NC            NC
            4-wire cross connect                                  NC              NC              NC             NC            NC
     Digital Loop to DCS / Switch Port                                                                                    
            2-wire cross connect                                  NC              NC              NC             NC            NC
            4-wire cross connect                                  NC              NC              NC             NC            NC
                                                                                                                          
Local Switching                                                                                                           
 Interim Structure                                                                                                        
   Within the Same Central Office                                                                                         
    Per Originating or Terminating MOU                     $0.002417       $0.006306       $0.004478            N/A           N/A
   Between Different Central Offices                                                                                      
    Per Originating or Terminating MOU                     $0.006123       $0.013916       $0.010359            N/A           N/A
 Long Term Structure                                                                                                      
    Per Originating or Terminating MOU                     $0.002417       $0.006306       $0.004478            N/A           N/A
                                                                                                                          
 Customized Routing                                              ICB             ICB             ICB            ICB           ICB
                                                                                                                          
Port Charge Per Month                                                                                                     
     Analog Line Port                                          $2.85           $2.85           $2.85         $82.75        $74.30
     Analog Trunk Side (DID)                                  $24.80          $24.80          $24.80        $152.60         ---
     BRI Port                                                  $6.40           $6.40           $6.40         $13.25         $7.30
     PRI Port                                                $201.35         $201.35         $201.35        $441.25       $200.90
     Feature Activation per Port Type                            ICB             ICB             ICB            ICB           ICB
     Centrex-like System Charges                                 ICB             ICB             ICB            ICB           ICB
     EAS Port Additive                                        $24.00          $24.00          $24.00             NA            NA
                                                                                                                          
Tandem Switching                                                                                                          
     per Minute Of Use                                     $0.001696       $0.001696       $0.001696            ---           ---
                                                                                                                          
Common Transport                                                                                                          
     per Minute Of Use                                     $0.000441       $0.000456       $0.000555            ---           ---
                                                                                                                          
Dedicated Transport                                                                                                                 
     Entrance Facility:                                                                                                   
     DS1                                                     $148.95         $148.95         $148.95        $628.00       $456.00
     DS3                                                   $1,805.00       $1,805.00       $1,805.00        $637.00       $496.00
                                                                                                                          
     Interoffice Transport:                                                                                               
       DS1    First Mile                                      $69.00          $69.00          $69.00        $408.00       $314.00
              Each Additional Mile                            $17.70          $17.70          $17.70            N/A           N/A
       DS3    First Mile                                     $933.00         $933.00         $933.00        $473.00       $341.00
              Each Additional Mile                           $118.00         $118.00         $118.00            N/A           N/A
</TABLE>

PAGE 1 OF 2
<PAGE>   269
                           UNE PRICE LIST - ARKANSAS

<TABLE>
<S>                                                        <C>             <C>             <C>             <C>            <C>
Dedicated Transport Cross Connects
     Voice Grade 2-wire                                           NC              NC              NC              NC           NC
     Voice Grade 4-wire                                           NC              NC              NC              NC           NC
     DS0 to DCS                                                   NC              NC              NC              NC           NC
     DS1                                                          NC              NC              NC              NC           NC
     DS3                                                          NC              NC              NC              NC           NC
                                                                                                           
Digital Cross-Connect System                                                                               
     DCS Port Charge                                                                                       
     DSO                                                      $12.00          $12.00          $12.00          $20.00      N/A
     DS1                                                      $45.14          $45.14          $45.14          $43.00      N/A
     DS3                                                     $490.05         $490.05         $490.05          $32.00      N/A
     DCS Establishment Charge                                    N/A             N/A             N/A       $1,722.00      N/A
     Database Modification Charge                                N/A             N/A             N/A          $80.00      N/A
     Reconfiguration Charge                                      N/A             N/A             N/A           $1.25      N/A
<CAPTION>
Service Order Charges - Unbundled Elements                  Simple          Complex
<S>                                                        <C>             <C>             
     New Service                                              $60.00         $245.00
     Change                                                   $58.00         $136.00
     Record                                                   $36.00         $114.00
     Disconnect                                               $30.00          $65.00
<CAPTION>
                                                               Nonrecurring Charge
Maintenance of Service Charges                              Initial        Additional
<S>                                                        <C>             <C>
     Basic Time                                               $30.93          $21.32 per 1/2 hr. or fraction thereof
     Overtime                                                 $36.35          $26.73 per 1/2 hr. or fraction thereof
     Premium Time                                             $41.77          $32.15 per 1/2 hr. or fraction thereof

Time and Material Charges

     Basic Time                                               $30.93          $21.32 per 1/2 hr. or fraction thereof
     Overtime                                                 $36.35          $26.73 per 1/2 hr. or fraction thereof
     Premium Time                                             $41.77          $32.15 per 1/2 hr. or fraction thereof
</TABLE>

                                 PAGE 2 OF 2
<PAGE>   270
                                                               Appendix Wireless
                                                                     PAGE 2 OF 6
                             
                                APPENDIX WIRELESS


This Appendix sets forth the terms and conditions under which the Parties will
distribute revenue from their joint provision of Wireless Interconnection
Service for traffic originated on a Commercial Mobile Radio Service (CMRS)
Provider's network and terminating through the Parties' respective wireline
switching networks within a Local Access and Transport Area (LATA). The Parties
will be compensated under this Appendix only to the extent that they are not
been compensated for Wireless Interconnection Service under other tariffs,
settlement agreements, contracts or other mechanism. This Appendix is subject to
the terms and conditions of applicable tariffs.

1.0      DEFINITIONS

         1.1.     Wireless Interconnection Service - The interchange of traffic
                  originated from a Commercial Mobile Radio Service (CMRS)
                  Provider's Mobile Telephone Switching Office (MTSO) through
                  SWBT's or the LSP's point of switching for termination on the
                  relevant Party's wireline switching network.

         1.2.     Commercial Mobile Radio Service (CMRS) Provider - A radio
                  common carrier provider of domestic public cellular
                  telecommunication service, as defined in Part 22, Part 24, or
                  Part 90 of the FCC Rules and Regulations.

         1.3.     End Office - SWBT or LSP switching system where exchange
                  service customer station loops are terminated for the purpose
                  of interconnection to each other and to the network.

         1.4.     Local Access and Transport Area ("LATA") - A geographic area 
                  marking the boundaries beyond which a Bell Operating Company
                  formerly could not carry telephone calls pursuant to the terms
                  of the Modification of Final Judgment (MFJ), U.S. vs. American
                  Tel. & Tel. Co., 552 F.Supp. 131 (D.D.C. 1983), affirmed sub
                  nom. Maryland v. United States, 460 U.S. 1001 (1983).

         1.5.     Local Calling Area or Local Calling Scope - That area in which
                  the message telephone exchange service between two or more end
                  offices, without a toll charge, is provided.

         1.6.     Minutes of Use (MOU) - For the purposes of this Appendix, MOU
                  means the Terminating Traffic as recorded by the Primary
                  Company or MOU provided by the CMRS Provider to the Primary
                  Company where the Primary Company is unable to measure the
                  actual terminating usage.

         1.7.     Mobile Telephone Switching Office ("MTSO") - A CMRS Provider's
                  switching equipment or terminal used to provide CMRS
                  Provider's switching services or, 


<PAGE>   271
                                                               Appendix Wireless
                                                                     PAGE 3 OF 6


                  alternatively, any other point of termination designated by
                  the CMRS Provider. The MTSO directly connects the CMRS
                  Provider's customers within its licensed serving area to the
                  Primary Company's facilities.

         1.8.     Primary Company - The Party that provides the End Office or
                  Tandem Office where the CMRS Provider chooses to connect
                  terminating traffic. The Primary Company also bills the CMRS
                  Provider for Wireless Interconnection Service.

         1.9.     Revenues - Those monies the Primary Company bills and collects
                  from the CMRS Provider for jointly provided Wireless
                  Interconnection Service.

         1.10.    Secondary Company - The Party that receives Terminating 
                  Traffic from the Primary Company.

         1.11.    Tandem Office - A Party's switching system that provides an
                  intermediate switching point for traffic between end offices
                  or the network.

         1.12.    Terminating Traffic - That traffic which is delivered by a
                  CMRS Provider to the Primary Company for termination at a
                  point on the intraLATA wireline switching network.

2.0      ADMINISTRATION OF REVENUE DISTRIBUTION

         2.1.     The Primary Company will compute, bill, collect and distribute
                  the revenue for jointly provided Wireless Interconnection
                  Service for calls terminating within a LATA. On jointly
                  provided Wireless Interconnection Service, the Primary Company
                  will distribute a portion of the Local Transport (LT) Revenues
                  as described below with the Secondary Company for its part in
                  terminating traffic from the CMRS Provider. The Primary
                  Company will distribute applicable Local Switching (LS) and
                  Carrier Common Line (CCL) charges which are collected from the
                  CMRS Provider to the Secondary Company, as described below.

         2.2.     Distribution of revenues will be computed using the rate
                  elements as defined in SWBT's applicable Wireless
                  Interconnection Tariff.

         2.3.     For terminating traffic, actual monthly wireless MOU will be
                  measured by the Primary Company for each office in the LATA or
                  provided to the Primary Company by the CMRS Provider in those
                  cases where the Primary Company is unable to measure the
                  actual terminating usage.

         2.4.     Each month, the amount of CCL and LS revenue (based on the
                  rates in the Primary Company's applicable tariffs) due the
                  Secondary Company from the Primary Company will be determined
                  by totaling the actual terminating MOU associated with each of
                  the Secondary Company's end offices and multiplying 


<PAGE>   272
                                                               Appendix Wireless
                                                                     PAGE 4 OF 6


                  those MOU by the appropriate rates as set out above. The LT
                  revenues due to the Secondary Company will be determined for
                  each Secondary Company end office by multiplying the billed
                  MOU by the appropriate LT rate multiplied by the applicable
                  end office percentage ownership of facilities listed in
                  Exhibit A to this Appendix.

         2.5.     The Primary Company will prepare a revenue and usage statement
                  on a monthly basis. Within 90 calendar days after the end of
                  each billing period, except in cases of disputes, the Primary
                  Company will remit the compensation amount due the Secondary
                  Company. When more than one compensation amount is due, they
                  may be combined into a single payment. No distribution will be
                  made for the revenue the Primary Company is unable to collect.

         2.6.     The revenue and usage statement will contain the following
                  information:

                  2.6.1.   The number of MOU for each of the Secondary Company's
                           end offices, the corresponding rate elements to be
                           applied to the MOUs for each end office, and the
                           resulting revenues;

                  2.6.2.   The total of the MOU and revenues for the Secondary 
                           Company;

                  2.6.3.   The percent ownership factor used to calculate the 
                           distribution of Local Transport revenues; and,

                  2.6.4.   Adjustments for uncollectibles.

         2.7.     The Parties agree that revenue distribution under this
                  Appendix will apply as of the effective date of the Agreement.
                  The Primary Company will start revenue distribution on usage
                  within 60 calendar days from the date this Appendix is
                  effective.

3.0      TERMINATION PROVISIONS

         3.1.     This Appendix shall remain in effect until terminated by
                  either Party upon a minimum of 30 calendar days written notice
                  by such Party to the designated representative of the other.

         3.2.     This Appendix may be terminated by an order of an appropriate
                  regulatory commission or a court of competent jurisdiction.

4.0      MISCELLANEOUS PROVISIONS

         4.1.     Exhibit A to this Appendix is attached and incorporated into
                  this Appendix by reference. From time to time, by written
                  agreement of both parties, new Exhibits 


<PAGE>   273
                                                               Appendix Wireless
                                                                     PAGE 5 OF 6

                  may be substituted for the attached Exhibit A, superseding and
                  canceling the Exhibit A previously in effect.

         4.2.     Each party will promptly upon request, furnish to the other
                  such information as may reasonably be required to perform
                  under this Appendix.

5.0      NOTICE

         5.1.     In the event any notices are required under the terms of this
                  Appendix, they shall be sent by registered mail, return
                  receipt requested to:

                           if to SWBT                Jeff Fields

                           if to LSP                 Richard Weinstein
<PAGE>   274

                                                               Appendix Wireless
                                                                     PAGE 6 OF 6

                         EXHIBIT A TO APPENDIX WIRELESS

           END OFFICE PERCENT OWNERSHIP OF LOCAL TRANSPORT FACILITIES


CLLI CODE                   NPA-NXX                    % OWNERSHIP OF TRANSPORT 
FACILITIES






<PAGE>   275


                                                                     APPENDIX WP
                                                                     PAGE 2 OF 6
                           
                                   APPENDIX WP

                         WHITE PAGES DIRECTORY APPENDIX

SWBT and LSP agree to the following terms and conditions for the printing and
distribution of White Pages directories:

1.       SWBT publishes White Pages directories for geographic areas in which
         LSP also provides local exchange telephone service, and LSP wishes to
         include listings information for its end users in the appropriate SWBT
         White Pages directories.

2.       LSP also desires distribution to its end users of the White Pages 
         directories that include listings of LSP's end users.

3.       NOW THEREFORE, in consideration of these premises, SWBT and LSP agree 
         as follows:

I.       SERVICE PROVIDED

         A.       Subject to SWBT's practices, as well as the rules and
                  regulations applicable to the provision of White Pages
                  directories, SWBT will include in appropriate White Pages
                  directories the primary alphabetical listings of all LSP end
                  users located within the local directory scope. The rules,
                  regulations and SWBT practices are subject to change from time
                  to time.

         B.       Prior to the issuance of a particular directory and at such
                  time or times as may be mutually agreed, the LSP shall furnish
                  to SWBT, in a form acceptable to both Parties, subscriber
                  listing information pertaining to LSP end users located within
                  the local directory scope, along with such additional
                  information as SWBT may require to prepare and print the
                  alphabetical listings of said directory.

         C.       LSP may provide LSP's subscriber listing information to SWBT
                  for inclusion in the White Pages directory via either a
                  mechanical or manual feed of the listing information to SWBT's
                  listing database or the LSP may choose to provide listings in
                  the form of camera ready copy.

         D.       If LSP provides its subscriber listing information to SWBT via
                  a mechanical or manual feed such listings are to be
                  alphabetically interfiled (interspersed) in the SWBT directory
                  among SWBT subscriber listings. If LSP provides its subscriber
                  listing information to SWBT in the form of camera ready copy,
                  SWBT will include such listings as a separate section of the
                  White Pages directory included in a separate section of the
                  SWBT White Pages directory.


<PAGE>   276
                                                                
                                                                     APPENDIX WP
                                                                     PAGE 3 OF 6

         E.       Sixty (60) days prior to the business office close date for a
                  particular directory, SWBT shall provide LSP a verification
                  list of its subscriber listings, as such listings are to
                  appear in the directory. The verification list shall also
                  include Directory Delivery Address information for each LSP
                  end user. LSP shall review this verification list and shall
                  submit to SWBT any necessary additions, deletions or
                  modifications within thirty (30) days of receipt of the list
                  from SWBT.

         F.       If LSP provides its subscriber listing information to SWBT in
                  the form of camera ready copy. SWBT shall provide LSP sixty
                  (60) days written notice of the date by which LSP must provide
                  this information to SWBT.

         G.       Sixty (60) days prior to the directory close, LSP shall
                  provide to SWBT written specification of the total number of
                  directories that it will require, along with the number of
                  directory(ies) that each LSP end user will require. SWBT will
                  provide one (1) copy of the directory to LSP end users, unless
                  otherwise instructed by the LSP.

         H.       At LSP's request, SWBT will include LSP specific information
                  (i.e., business office, residence office, repair bureau, etc.)
                  in the White Pages directory on an "index-type" informational
                  page. This page will also include specific information
                  pertaining to other LSPs. At its option, LSP shall provide
                  SWBT with its logo and information in the form of a camera
                  ready copy, sized at 1/8th of a page.

         I.       At its request, LSP may purchase "Informational Page(s)" in
                  the informational section of the White Pages directory
                  covering a geographic area. Such page(s) shall be no different
                  in style, size, color and format than SWBT "Informational
                  Pages". Sixty (60) days prior to the directory close date, the
                  LSP shall provide to SWBT the "Informational Page" in the form
                  of camera- ready copy.

II.      USE OF SUBSCRIBER LISTING INFORMATION

         A.       LSP authorizes SWBT to use the subscriber listing information
                  provided to SWBT pursuant to this Appendix for the sole
                  purpose of including the listings in the appropriate printed
                  White Pages directory and directory assistance databases where
                  such service is provided by SWBT.

         B.       At LSP's request, SWBT shall transmit LSP's end user listing
                  information to designated third party directory publishers
                  (limited to publishers that SWBT transmits its own listing
                  information) for a one-time administrative fee of $100.00 per
                  occurrence, per directory publisher.
<PAGE>   277
                                                                     APPENDIX WP
                                                                     PAGE 4 OF 6

III.     PRICING

         A.       The rates for the services described herein are identified on
                  Exhibit I. If LSP provides its subscriber listing information
                  to SWBT via a mechanical or manual feed of the listings to
                  SWBT's listings database, SWBT will assess per book copy, per
                  subscriber line, charge when directories are delivered to LSP
                  end user premises, or an annual, per book copy charge when
                  delivered in bulk to LSP. Included in this rate, LSP will
                  receive for its end user, one single listing in SWBT's White
                  Page directory, and one copy of the directory delivered to
                  either its end user's premises, or in bulk to the LSP
                  location.

         B.       Where an LSP end user requires additional listings to appear
                  in the White Pages directory, SWBT will assess LSP an annual
                  charge for such listings at existing SWBT tariff rates.

         C.       For any "Subsequent" directory orders (orders placed after the
                  initial order/forecsat is provided - see I. G. above), SWBT
                  shall charge LSP a per book copy charge. This rate applies,
                  per book copy, when such directories are delivered in bulk to
                  LSP or to the LSP's end user premises.

         D.       For inclusion of the LSP "Informational Page" in the White
                  Pages directory, SWBT shall charge the LSP an annual fee for
                  inclusion in the Metropolitan area book.

IV.      ASSIGNMENT

         The subscriber listing information shall remain the property of LSP.
         Except as stated in Section II herein, SWBT shall not sublicense,
         assign, sell or transfer the subscriber listing information provided
         hereunder, nor shall SWBT authorize any other company or any person to
         use the subscriber listing information for any other purpose. SWBT
         shall take appropriate measures to guard against any unauthorized use
         of the listings provided to it hereunder (at least the same measures
         SWBT takes to protect its own listings from unauthorized use), whether
         by SWBT, its agents, employees or others.

V.       LIABILITY

         A.       LSP hereby releases SWBT from any and all liability for
                  damages due to errors or omissions in LSP's subscriber listing
                  information as provided to SWBT under this Appendix, and/or
                  LSP's subscriber listing information as it appears in the
                  White Pages directory, including, but not limited to, special,
                  indirect, consequential, punitive or incidental damages.

         B.       LSP shall indemnify,  protect,  save harmless and defend SWBT 
                  (or SWBT's officers, employees, agents, assigns and
                  representatives) from and against any and all losses,
                  liability, damages and expense arising out of any demand,
                  claim, suit or 


<PAGE>   278
                                                                     APPENDIX WP
                                                                     PAGE 5 OF 6


                  judgment by a third party in any way related to any error or
                  omission in LSP's subscriber listing information as it appears
                  in the White Pages directory, including any error or omission
                  related to non-published or non-listed subscriber listing
                  information. LSP shall so indemnify regardless of whether the
                  demand, claim or suit by the third party is brought jointly
                  against LSP and SWBT, and/or against SWBT alone. However, if
                  such demand, claim or suit specifically alleges that an error
                  or omission appears in LSP's subscriber listing information in
                  the White Pages directory, SWBT may, at its option, assume and
                  undertake its own defense, or assist in the defense of the
                  LSP, in which event the LSP shall reimburse SWBT for
                  reasonable attorney's fees and other expenses incurred by SWBT
                  in handling and defending such demand, claim and/or suit.

         C.       This Appendix shall not establish, be interpreted as
                  establishing, or be used by either party to establish or to
                  represent their relationship as any form of agency,
                  partnership or joint venture. Neither Party shall have any
                  authority to bind the other or to act as an agent for the
                  other unless written authority, separate from this Appendix,
                  is provided. Nothing in the Appendix shall be construed as
                  providing for the sharing of profits or losses arising out of
                  the efforts of either or both of the Parties. Nothing herein
                  shall be construed as making either Party responsible or
                  liable for the obligations and undertakings of the other
                  Party.

VI.      BREACH OF CONTRACT

         If either Party is found to have materially breached this Appendix, the
         non-breaching Party may terminate the Appendix by providing written
         notice to the breaching party, whereupon this Appendix shall be null
         and void with respect to any issue of SWBT's White Pages directory
         published sixty (60) or more days after the date of receipt of such
         written notice.

VIII.    TERM

         A.       This Appendix shall continue in force for one (1) until
                  terminated by sixty (60) days prior written notice by either
                  Party to the other. Upon termination, SWBT shall cease using,
                  for any purpose whatsoever, the subscriber listing information
                  provided hereunder by LSP, and shall promptly return such
                  subscriber listing information to the LSP.

         B.       Upon termination of the interconnection Agreement, this
                  Appendix will be null and void with respect to any issue of
                  directories published thereafter, except that the
                  indemnification provided by Section V herein shall continue
                  with respect to any directory published within sixty (60) days
                  of termination.

<PAGE>   279
                                                                     APPENDIX WP
                                                                     PAGE 6 OF 6


                                   APPENDIX WP
                                    EXHIBIT I
                                   PRICE LIST





<TABLE>
<CAPTION>

      DIRECTORY        PRICE PER BOOK COPY  PRICE PER BOOK COPY     PRICE PER SINGLE      PRICE PER BOOK
                        DELIVERED IN BULK     DELIVERED TO LSP    SIDED INFORMATIONAL   COPY (1) ORDERED AFTER
                             TO LSP               END USER                PAGE             INITIAL ORDER
==========================================================================================================
<S>                           <C>                  <C>                  <C>                   <C>   
Little Rock                   $1.94                $2.72                $964.44               $10.00
Fayetteville                  $1.36                $1.82                $178.60               $10.00
Fort Smith                    $1.36                $1.82                $178.60               $10.00
Hot Springs                   $1.36                $1.82                $178.60               $10.00
Jonesboro                     $1.36                $1.82                $178.60               $10.00
==========================================================================================================
</TABLE>




- ------------------------------
(1) Subject To Availability

<PAGE>   280

                                                                     APPENDIX TP
                                                                     PAGE 2 OF 2

 
                         ELECTRICAL/OPTICAL INTERFACES:

               -  SWBT Technical Publication TP-76839 - SONET Transmission
                  Requirements - Performance and Interface Specifications, Issue
                  1, January 1996, or the most current version.

               -  SWBT Technical Publication TP-76625 - High Capacity Digital
                  Service (1.544 Mbs and 44.736 Mbs Requirements and
                  Transmission Limits, Issue 1, June 1990, or the most current
                  version.

               INTERCONNECTION RESPONSIBILITIES RELATED TO SIGNALING:
               -  SWBT Technical Publication, TP-76638 - Common Channel
                  Signaling Network Interface Specifications

               -  GR-000246-CORE, Bell Communications Research Specifications of
                  Signaling System 7

               -  GR-000317-CORE, Switching System Requirements for Call Control
                  Using the Integrated Services Digital Network User Part

               -  GR-000394-CORE, Switching System Requirements for
                  Interexchange Carrier Interconnection Using the Integrated
                  Services Digital Network User Part

               -  GR-000606-CORE, LATA Switching Systems Generic
                  Requirements-Common Channel Signaling-Section 6.5

               -  GR-000905-CORE, Common Channel Signaling Network Interface
                  Specification Supporting Network Interconnection Message
                  Transfer Part (MTP) and Integrated Digital Services Network
                  User Part (ISDNUP)

               COLLOCATION 
               -  SWBT's Technical Publication for Physical Collocation (sixth
                  revision dated 2-18-97)

               TECHNICAL EXHIBIT SETTLEMENT PROCEDURES 

               -  TESP


<PAGE>   281


                                                                   APPENDIX PORT
                                                                     PAGE 2 OF 5

                                  APPENDIX PORT

I.       GENERAL

         SWBT and LSP will provide Interim Number Portability (INP) in
         accordance with requirements of the Act. INP will be provided by each
         Party to the other upon request. INP will be provided with minimum
         impairment of functionality, quality, reliability and convenience to
         subscribers of LSP or SWBT. The Parties will provide Permanent Number
         Portability (PNP) as soon as it is technically feasible, in conformance
         with FCC rules and the Act, and will participate in development of PNP
         in the state, in accordance with the FCC's First Report and Order in
         Docket No. 95-116 (hereinafter called the Number Portability Order). As
         described herein, INP is a service arrangement whereby an end user, who
         switches subscription of local exchange service from one provider to
         another is permitted to retain, for its use, the existing assigned
         number provided that the end user remains in the same serving wire
         center.

II.      TERMS, CONDITIONS UNDER WHICH SWBT SHALL PROVIDE INP

         A.       SERVICE PROVIDED

                  1.       SWBT shall only provide INP, as described herein, to 
                           LSPs.

                  2.       SWBT shall only provide INP services and facilities
                           where technically feasible, subject to the
                           availability of facilities, and only from properly
                           equipped central offices. SWBT does not offer INP
                           services and facilities for NXX codes 555, 976, 950,
                           or SWBT operated coin telephone service.

                  3.       LSP shall not order INP services for local exchange
                           end user accounts of SWBT where the end user=s
                           payments are 45-days or more in arrears unless full
                           payment is made or an agreement is reached where the
                           LSP agrees to make full payment on the end user=s
                           behalf.

                  4.       When the exchange service offerings associated with
                           INP service are provisioned using remote switching
                           arrangements, SWBT shall only make INP service
                           available from, or to host central offices.

         B.       OBLIGATIONS OF SWBT

                  1.       SWBT's sole responsibility is to comply with the
                           service requests it receives from the LSP and to
                           provide INP in accordance with this Appendix.

         C.       OBLIGATIONS OF LSPS

                  1.       LSP shall coordinate the provision of service with
                           SWBT to assure that 


<PAGE>   282
                                                                   APPENDIX PORT
                                                                     PAGE 3 OF 5

                           LSP's switch is capable of accepting INP ported
                           traffic.

                  2.       LSP is solely  responsible  to provide  equipment 
                           and facilities that are compatible with
                           SWBT's service parameters, interfaces, equipment and
                           facilities. LSP shall provide sufficient terminating
                           facilities and services at the terminating end of an
                           INP call to adequately handle all traffic to that
                           location and shall ensure that its facilities,
                           equipment and services do not interfere with or
                           impair any facility, equipment or service of SWBT or
                           any of its end users. In the event that SWBT
                           determines in its sole judgment that the LSP will
                           likely impair or is impairing, or interfering with
                           any equipment, facility or service of SWBT or any of
                           its end users, SWBT may either refuse to provide INP
                           service or terminate it in accordance with other
                           provisions of this STC or SWBT's tariffs.

                  3.       LSP shall provide an appropriate intercept
                           announcement service for any telephone numbers
                           subscribed to INP service for which LSP is not
                           presently providing local exchange service or
                           terminating to an end user.

                  4.       Where LSP chooses to disconnect or terminate any INP
                           service, LSP shall designate which standard SWBT
                           intercept announcement SWBT shall provide for
                           disconnected number.

                  5.       LSP shall designate to SWBT at the time of its
                           initial service request for INP service one of the
                           following options for handling and processing of
                           Calling Card, Collect, Third Party, and other
                           operator handled non-sent paid calls from or to LSP
                           assigned telephone numbers:

                           a.       LSP may elect to block the completion of
                                    third number and calling card calls through
                                    the use of LIDB to select ported numbers.

                           b.       For non-sent paid calls billed to INP
                                    assigned numbers, a separate
                                    sub-clearinghouse billing arrangement must
                                    be established which will provide for the
                                    transmission of the EMR 01-01-01 billing
                                    records, and settlement of toll revenues.

         D.       LIMITATIONS OF SERVICE

                  1.       SWBT is not responsible for adverse effects on any
                           service, facility or equipment from the use of INP
                           service.

                  2.       End-to-end transmission characteristics may vary
                           depending on the distance and routing necessary to
                           complete calls over INP facilities and the fact that
                           another carrier is involved in the provisioning of
                           service. Therefore, end-to-end transmission
                           characteristics cannot be specified by SWBT for such
                           calls.
<PAGE>   283
                                                                   APPENDIX PORT
                                                                     PAGE 4 OF 5

         E.       SERVICE DESCRIPTIONS

                  1.       INP-REMOTE. INP-Remote is a service whereby a call
                           dialed to an INP-Remote equipped telephone number,
                           assigned to SWBT, is automatically forwarded to an
                           LSP-assigned, 7 or 10 digit local telephone number.
                           The forwarded-to-number is specified by the LSP at
                           the same location.

                           a.       INP-Remote provides an initial call path and
                                    two additional paths for the forwarding of
                                    no more than three (3) simultaneous calls to
                                    the LSP's specified forwarded-to number.
                                    Additional call paths are available on a per
                                    path basis.

                           b.       The LSP-assigned forwarded-to number shall
                                    be treated as two separate calls with
                                    respect to interconnection compensation, end
                                    user toll billing and intercompany
                                    settlement and access billing, i.e., an
                                    incoming call to the SWBT ported number
                                    shall be handled like any other SWBT call
                                    being terminated to that end office and the
                                    ported call to the LSP assigned telephone
                                    number in the LSP switch shall be handled as
                                    any local calls between SWBT and the LSP.

                           c.       Where facilities exist, SWBT will provide
                                    identification of the originating telephone
                                    number, via SS7 signaling, to the LSP.

                  2.       INP-DIRECT. INP-Direct is a service which provides
                           for the delivery of the called (dialed) number to the
                           LSP's switching (central office or premises)
                           equipment for identification and subsequent routing
                           and call completion.

                           a.       INP-Direct  is  available  either on a per 
                                    voice grade channel basis or a per DS1 (24
                                    equivalent voice grade channels) basis.


                                    (1)     Where the location of the LSP's
                                            switching equipment to which SWBT is
                                            providing voice grade or DS1
                                            INP-Direct service reside outside
                                            the exchange or central office
                                            serving area from which the
                                            INP-Direct service is purchased, LSP
                                            shall pay applicable interoffice
                                            mileage charges as specified in the
                                            applicable state Special Access
                                            Tariff.

                           b.       INP-Direct service must be established with
                                    a minimum configuration of two (2) voice
                                    grade channels and one unassigned telephone
                                    number per SWBT switch. Transport facilities
                                    arranged for INP-Direct may not be mixed
                                    with any other type of trunk 


<PAGE>   284
                                                                   APPENDIX PORT
                                                                     PAGE 5 OF 5

                                     group. Outgoing calls may not be placed
                                     over facilities arranged for INP-Direct
                                     service.

                           c.        SS7 Signaling is not available on the 
                                     INP-Direct facilities.

         F.       PRICING

                  1.       The Parties will comply with all effective FCC,
                           Commission and/or court Orders governing INP cost
                           recovery and compensation. The Parties acknowledge
                           that the Telephone Number Portability Order is
                           subject to pending Petitions for Reconsideration and
                           may be subject to appeal. As such, the Number
                           Portability Order may be reconsidered, revised and
                           remanded, or vacated, subject to further proceedings
                           before the FCC. As such, until a final decision is
                           rendered on INP cost recovery, the Parties agree to
                           track the costs associated with the implementation
                           and provision of INP and to "true-up" INP-related
                           accruals to reflect the final terms of any such
                           order.

                  2.       Neither Party waives its rights to advocate its 
                           views on INP cost recovery, or to present before any
                           appropriate regulatory agency or court its views on
                           FCC or Commission actions pertaining to INP cost
                           recovery.

<PAGE>   285


                                            Agreement No. ______________________



                           MASTER AGREEMENT FOR ACCESS
             TO POLES, DUCTS, CONDUITS, AND RIGHTS-OF-WAY (ARKANSAS)

         This Agreement dated _____________, 19__, is made by and between
Southwestern Bell Telephone Company ("SWBT") and the undersigned Applicant. As
provided in this Agreement, SWBT will provide Applicant nondiscriminatory
access, in accordance with the Pole Attachment Act, the Telecommunications Act
of 1996, and applicable rules, regulations, and commission orders, to poles,
ducts, conduits, and rights-of-way owned or controlled by SWBT and located in
this state.

                               ARTICLE 1: PARTIES

         1.01 Southwestern Bell Telephone Company. Southwestern Bell Telephone
Company is a corporation chartered in the State of Missouri. SWBT's principal
office is located at 1010 Pine Street, St. Louis, Missouri 63101.

         1.02 Applicant. Applicant is a telecommunications carrier or cable
television system doing business or operating in this State under the following
name(s):
________________________________________________________________________
_______________________________________________________________________.
Applicant maintains offices in this State at the following address:
____________________
_______________________________________________________________________.
Applicant is more fully described in APPENDIX II ("Identification of
Applicant").

                         ARTICLE 2: PURPOSE OF AGREEMENT

         2.01 Primary Purpose of Agreement. The primary purpose of this
Agreement is to set forth the rates, terms, conditions, and procedures under
which SWBT will provide Applicant access to SWBT's poles, ducts, conduits, and
rights-of-way located in this State.

         2.02 Applicability. This Agreement applies to all poles, ducts,
conduits, and rights-of-way subject to the Pole Attachment Act, 47 U.S.C.
Section 224, as amended by the Telecommunications Act of 1996, and further 
amendments.

         2.03 Construction in Accordance with Purpose. All provisions of this
Agreement shall be construed and applied consistently with the requirements of
the Pole Attachment Act and those provisions of the Telecommunications Act of
1996, including but not limited to 47 U.S.C. Sections 251(b)(4) and
271(c)(2)(B)(iii), which mandate access to SWBT's poles, ducts, conduits, and
rights-of-way.

                                     PAGE 1
<PAGE>   286

         2.04 Uniform Application and Nondiscriminatory Access. In Paragraph
1156 of the First Interconnection Order in CC Docket No. 96-98, the FCC has
ordered that "[W]here access is mandated, the rates, terms, and conditions of
access must be uniformly applied to all telecommunications carriers and cable
operators that have or seek access." In Paragraph 1157 of the First
Interconnection Order, the FCC has further stated that except as specifically
noted elsewhere in that order, "a utility may not favor itself over other
parties with respect to the provision of telecommunications or video programming
services." This Agreement has been drafted and shall be construed to effectuate
these nondiscriminatory access requirements.

         2.05 Effect on Rights and Remedies under Law. This Agreement is
intended by the parties to implement, rather than abridge, their respective
rights under federal and state law. In the event of an irreconcilable conflict
between any provision of this Agreement and any applicable federal or state
laws, rules, regulations, or commission orders, the parties' rights and remedies
under such laws, rules, regulations, and orders shall take precedence over the
terms of this Agreement.

         2.06 Additional Negotiations. This Agreement is one of many agreements
between SWBT and parties seeking access to SWBT's poles, ducts, conduits, and
rights-of-way in this State. Nothing contained in this Agreement shall preclude
SWBT from negotiating additional or different terms of access with third
parties. Applicant may, at any time, seek amendments to this Agreement to
conform to the terms of agreements between SWBT and third parties. In addition,
the parties acknowledge that it may be necessary to amend or supersede this
Agreement to conform to changes in the law, streamline procedures for granting
access, address issues not addressed in this Agreement, and resolve operational
concerns arising by virtue of the presence of competing providers of
telecommunications and cable television services on, within, or in the vicinity
of SWBT's poles, ducts, conduits, and rights-of-way. Each party shall,
therefore, at the request of the other party, engage in good faith negotiations
to supplement, amend or replace this Agreement.

         2.07 Relationship to Interconnection Agreement. SWBT has provided
Applicant the option of executing this Agreement either as a standalone
agreement or as part of the interconnection agreement, if any, between the
parties. Applicant's election is reflected in this section, and this Agreement
shall be construed in accordance with Applicant's election. If this Agreement
has been executed as part of an interconnection agreement, Applicant shall have
the additional option of replacing this Agreement at any time with SWBT's
then-current Master Agreement for Access to Poles, Ducts, Conduits, and
Rights-of-Way.

                [  ]  This Agreement has been entered into as a standalone 
                      Agreement.

                [  ]  This Agreement has been entered into, at Applicant's
                      request, as an appendix, attachment, or exhibit to an
                      interconnection agreement 

                                     PAGE 2
<PAGE>   287

                      between the parties. Except as otherwise specifically
                      stated in this Agreement, the terms of this Agreement,
                      which are specific to poles, ducts, conduits, and
                      rights-of-way, shall apply in the event of conflict
                      between the terms of this Agreement and the general terms
                      and conditions set forth in the interconnection agreement.

         2.08 Access Ancillary to Arrangements for Interconnection, Collocation,
and Access to Unbundled Network Elements. Nothing contained in this Agreement
shall be construed as precluding Applicant from having such additional access to
SWBT's poles, ducts, conduits, and rights-of-way as may be necessary to
effectuate the terms of other arrangements between Applicant and SWBT relating
to interconnection, collocation, and access to unbundled network elements. To
the extent that this Agreement does not provide the access required, additional
terms of access may be included in any tariff or agreement between the parties
establishing arrangements for interconnection, collocation, or access to
unbundled network elements.

                             ARTICLE 3: DEFINITIONS

         3.01 Definitions in general. As used in this Agreement, the terms
defined in this article shall have the meanings set forth below in Sections 3.02
to 3.48 except as the context otherwise requires.

         3.02 Agreement. The term "Agreement" refers to this Master Agreement
for Access to Poles, Ducts, Conduits, and Rights-of-Way. The term "Agreement"
includes all appendices, attachments, and addenda to this Agreement, including
but not limited to addenda, if any, reflecting state-specific requirements or
Applicant-specific requirements imposed by interconnection arbitration orders.

         3.03 Anchor. The term "anchor" refers to a device, structure, or
assembly which stabilizes a pole and holds it in place. An anchor assembly may
consist of a rod and fixed object or plate, typically embedded in the ground,
which is attached to a guy strand or guy wire which, in turn, is attached to the
pole. The term "anchor" does not include the guy strand which connects the
anchor to the pole.

         3.04 Appendix. The capitalized term "APPENDIX" refers to one of the
following appendices to this Agreement.

                APPENDIX I:      Schedule of Rates, Fees, and Charges

                APPENDIX II:     Identification of Applicant

                APPENDIX III:    Administrative Forms and Notices

                    SW-9433:     Pole Attachments
                                     PAGE 3

<PAGE>   288

                    SW-9434:     Access Application and Make-Ready 
                                 Authorization          
                   

                    SW-9435:     Conduit Occupancy

                    SW-9436A:    Notification of Surrender or Modification of 
                                 Pole Attachment License by Licensee

                    SW-9436B:    Notification of Surrender or Modification of 
                                 Conduit Occupancy License by Applicant

                    SW-9436C:    Notification of Unauthorized Attachments by 
                                 Applicant

                APPENDIX IV:     Insurance Requirements

                APPENDIX V:      Nondisclosure Agreement

                APPENDIX VI:     Notices to Applicant

                APPENDIX VII:    Notices to SWBT

                APPENDIX VIII:   Identification of Utility Liaison Supervisor 
                                 (ULS)

         3.05 Assigned. When used with respect to pole, duct, conduit, or
right-of-way space, the term "assigned" refers to space that is occupied by, or
has been designated for occupancy by, either party or by a third party. Except
as otherwise specifically provided in this Agreement, no person or entity shall
have the right to occupy space assigned to another person or entity (other than
on a temporary basis in the event of emergency as provided in Section 15.02 of
this Agreement) until the assignment has been released or lapsed. Assignment
procedures are described in Section 8.02 of this Agreement.

         3.06 Authorized contractor. "Authorized contractors" are contractors
selected by Applicant who may, subject to Applicant's direction and control,
perform facilities modification or make-ready work which would ordinarily be
performed by SWBT or persons acting on SWBT's behalf. As used in this Agreement,
the term "authorized contractor" does not refer to contractors performing
routine installation, maintenance, or repair work on Applicant's behalf or other
contractors who may be selected by Applicant to perform work on Applicant's
behalf without SWBT's approval. More specifically, the term "authorized
contractor" refers only to those contractors included on a list of contractors
mutually approved by Applicant and SWBT to perform one or more of the following
tasks within a specified SWBT construction district: (a) installation of those
sections of Applicant's ducts or facilities which connect to SWBT's conduit
system as provided in Section 6.08(c); (b) installation of inner duct as
provided in Section 10.02(b); (c) excavation work in connection with the removal
of retired or inactive (dead) cables as provided in Section 10.02(c); or (d)
make-ready work as provided in Sections 10.04 and 10.05. A person or entity
approved as an authorized contractor is only an authorized

                                     PAGE 4
<PAGE>   289
contractor with respect to those tasks for which such person or entity has been
approved by both parties and is an authorized contractor only in those
SWBT construction districts agreed to by both parties. Designation of an
authorized contractor for a specific category of tasks shall not be deemed to
be the designation of such person or entity as an authorized contractor for
other purposes, nor shall approval of an authorized contractor by one SWBT
construction district constitute approval of such authorized contractor for the
area served by a different SWBT construction district; provided, however, that
if a specific construction job extends beyond the boundaries of a single
construction district, an authorized contractor shall, for the purposes of that
job, be deemed to have been approved by all SWBT construction districts in
which the work is to be performed. If, by agreement of the parties or
commission order, Applicant has been approved as an authorized contractor, such
approval shall be noted by an addendum to this Agreement.

         3.07 Available. When used with respect to pole, duct, conduit, and
right-of-way space, the term "available" refers to space that is not occupied or
assigned. In conduit systems owned or controlled by SWBT, maintenance ducts will
not be considered "available" for assignment. All other unassigned ducts, inner
ducts, sub-ducts, and partitioned conduits in a conduit system owned or
controlled by SWBT will be deemed available for assignment.

         3.08 Cables. The term "cable" includes but is not limited to
twisted-pair copper, coaxial, and fiber optic cables. Cables are transmissions
media which may be attached to our placed in poles, ducts, conduits, and
rights-of-way but are not themselves poles, ducts, conduits, or rights-of-way.
Nothing contained in this Agreement shall be construed as a grant of access to
cables attached to SWBT's poles or placed in SWBT's ducts, conduits, or
rights-of-way.

         3.09 Conduit. The term "conduit" refers to all SWBT conduits subject to
the Pole Attachment Act. In general, conduits are tubes or structures, usually
underground or on bridges, containing one or more ducts used to enclose cables,
wires, and associated transmission equipment. Except as the context otherwise
requires, the term "conduit" refers only to conduit owned or controlled by SWBT,
including the re-enterable manholes and handholes used to connect ducts and
provide access to cables, wires, and other facilities within the ducts. As used
in this Agreement, the term "conduit" refers only to conduit structures
(including ducts, manholes and handholes) and space within those structures and
does not include (a) cables and other telecommunications equipment located
within conduit structures or (b) central office vaults, controlled environment
vaults, or other SWBT structures (such as huts and cabinets) which branch off
from or are connected to SWBT's conduit.

         3.10 Conduit occupancy. The term "conduit occupancy" refers to the
presence of wire, cable, optical conductors, or other equipment within any part
of SWBT's conduit system.

                                     PAGE 5


<PAGE>   290

         3.11 Conduit system. The term "conduit system" refers to any
combination of ducts, conduits, manholes, and handholes joined to form an
integrated whole. As used in this Agreement, the term "conduit system" refers
only to conduit systems owned or controlled by SWBT and does not include (a)
cables and other telecommunications equipment located within conduit structures
or (b) central office vaults, controlled environment vaults, or other SWBT
structures (such as huts and cabinets) which branch off from or are connected to
SWBT's conduit.

         3.12 Construction District. The term "construction district" refers to
the SWBT organization responsible for outside plant construction in a specified
geographic area. The term "construction district" connotes responsibility for
handling a function and not to the official name of the organization responsible
for outside plant construction matters.

         3.13 Cost/Cost-based. The terms "cost" and "costs" refer to costs
determined in a manner consistent with the Pole Attachment Act and applicable
rules, regulations, and commission orders. The term "cost-based" refers to
rates, fees, and other charges which are based on costs and determined in a
manner consistent with the Pole Attachment Act and applicable rules,
regulations, and commission orders.

         3.14 Duct. The term "duct" refers to all SWBT ducts subject to the Pole
Attachment Act. In general, a "duct" is a single enclosed tube, pipe, or channel
for enclosing and carrying cables, wires, and other equipment. As used in this
Agreement, the term "duct" includes "inner ducts" created by subdividing a duct
into smaller channels. Except as the context otherwise requires, the term "duct"
refers only to ducts owned or controlled by SWBT and space within those ducts
and does not include cables and other telecommunications equipment located
within such ducts.

         3.15 Facilities. The terms "facility" and "facilities" refer to any
property, equipment, or items owned or controlled by any person or entity.

         3.16 FCC. The acronym "FCC" refers to the Federal Communications
Commission.

         3.17 First Interconnection Order. The term "First Interconnection
Order" refers to the First Report and Order adopted by the FCC on September 1,
1996, and released on September 8, 1996, in CC Docket No. 96-98, In the Matter
of Implementation of the Local Competition Provisions in the Telecommunications
Act of 1996 and CC Docket No. 95-185, In the Matter of Interconnection between
Local Exchange Carriers and Commercial Mobile Radio Service Providers. Access to
poles, ducts, conduits, and rights-of-way is addressed in the First
Interconnection Order in Paragraphs 1119-1240.

         3.18 Handhole. The term "handhole" refers to a structure similar in
function to a manhole, but which is too small for personnel to enter. As used in
this Agreement, the term "handhole" refers only to handholes which are part of
SWBT's conduit system and does not refer to handholes which provide access to
buried cables not housed within 

                                     PAGE 6
<PAGE>   291

SWBT ducts or conduits. As used in this Agreement, the term "handhole" refers
only to handhole structures owned or controlled by SWBT and does not include
cables and other telecommunications equipment located within handhole
structures.

         3.19 Hazardous substances. The term "hazardous substances" refers to
hazardous and toxic substances, waste, pollutants, contaminants, and materials
as defined in the Comprehensive Environmental Response, Compensation and        
Liability Act ("CERCLA"), 42 U.S.C. Section 9601(14), as amended, and other
federal, state, and local health, safety, and environmental laws, ordinances,
statutes, rules, and regulations applicable to sites subject to this Agreement,
including but not limited to the Occupational Safety and Health Act ("OSHA").
In general, the term "hazardous substances" refers to any substance the
presence, use, transport, abandonment or disposal of which (a) requires
investigation, remediation, compensation, fine, or penalty under health,
safety, and environmental laws, ordinances, statutes, rules, and regulations
applicable to sites subject to this Agreement or (b) poses risks to human
health, safety, or the environment and is regulated under any such laws,
ordinances, statutes, rules, and regulations. For the purposes of this
Agreement, the term "hazardous substances" shall also include petroleum,
natural gas, and other combustible or noxious liquids, gases, or solids which
may accumulate at sites subject to this Agreement.

         3.20 Interconnection agreement. The term "interconnection agreement"
refers to the interconnection agreement, if any, to which this Agreement has
been made an appendix, attachment, or exhibit, or, as the context may require,
any other interconnection agreement between the parties.

         3.21 Jacket. The term "jacket" refers to a single enclosed outer
covering containing communications wires, fibers, or other communications media.
As used in this Agreement, the term "jacket" refers to the outermost sheath or
jacket of a cable.

         3.22 Joint user. The term "joint user" refers to any person or entity
which has entered or may enter into an agreement or arrangement with SWBT
permitting it to attach its facilities to SWBT's poles or place its facilities
in SWBT's ducts, conduits, or rights-of-way.

         3.23 License. The term "license" refers to a written instrument
confirming that SWBT has granted the application of Applicant or a third party
for access to pole, duct, conduit, or right-of-way space and that, based on
Applicant's or such third party's representations (and SWBT's field inspection,
if any), it appears that no further facilities modification, capacity expansion
or make-ready work by SWBT is required before facilities described in the
application are installed in the space requested. The term "license" refers to
licenses issued by SWBT pursuant to this Agreement and may, if the context
requires, refer to licenses issued by SWBT before the date of this Agreement.
The parties' use of the term "license" in this Agreement shall not be construed
as conferring authority or discretion on SWBT's part to deny access to Applicant
in any manner inconsistent with the requirements of the Pole Attachment Act, the

                                     PAGE 7

<PAGE>   292

Telecommunications Act of 1996, and applicable rules, regulations, and
commission orders.

         3.24 Local service provider ("LSP"). The terms "local service provider"
and "LSP" refer only to telecommunications carriers authorized by applicable
federal and state laws and regulations to provide local exchange service. As
used in this Agreement, these terms include SWBT.

         3.25 Maintenance duct. The term "maintenance duct" generally refers to
a full-sized duct (typically three inches in diameter or larger) which may be
used, on a short-term basis, for maintenance, repair, or emergency restoration
activities. Maintenance ducts will be available, on a nondiscriminatory basis,
to all persons and entities (including SWBT, Applicant, other local service
providers, and other joint users) with facilities in the conduit section in
which the maintenance duct is located for (a) short-term emergency repairs as
provided in Article 15 of this Agreement and (b) short-term non-emergency
maintenance or repair activities as provided in Articles 12 and 13 of this
Agreement. No more than one full-sized duct within any given conduit section
will be designated by SWBT as the maintenance duct. In those locations where, on
the effective date of this Agreement, there is not a full-sized duct available
to be used as a maintenance duct, SWBT will designate an inner duct, if one is
available, as the maintenance duct although such inner duct may be too small to
accommodate some of the cables occupying the conduit section in which such inner
duct is located. The term "maintenance duct" does not include ducts and conduits
extending from a SWBT manhole to customer premises. Maintenance ducts will not
be considered "available" (as defined in Section 3.07) for assignment to SWBT,
Applicant, or joint users for purposes other than short-term uses contemplated
in this section; provided, however, that SWBT may assign the duct currently
designated as a maintenance duct if another suitable full-sized duct will be
made available to serve as a replacement maintenance duct and may assign an
inner duct currently designated as a maintenance duct if another inner duct will
be made available to serve as a replacement maintenance duct. Maintenance duct
designations may change from time to time and may or may not be reflected in
SWBT's outside plant records. When only one usable full-sized duct remains in a
conduit section, that duct shall be deemed to be the maintenance duct.

         3.26 Make-ready work. The term "make-ready work" refers to all work
performed or to be performed to prepare SWBT's poles, ducts, conduits,
rights-of-way, and related facilities for the requested occupancy or attachment
of Applicant's facilities. Make-ready work does not include the actual
installation of Applicant's facilities. "Make-ready work" includes, but is not
limited to, clearing obstructions (e.g., by "rodding" ducts to ensure clear
passage), and rearranging, transferring, replacing, and removing existing
facilities on a pole or in a conduit system where such work is required to
accommodate Applicant's facilities (as contrasted with work performed on SWBT's
behalf in furtherance of SWBT's own business needs or convenience). "Make-ready
work" may require "dig-ups" of existing facilities and may include the repair,
enlargement or modification of SWBT's facilities (including, but not limited to,
poles, 

                                     PAGE 8
<PAGE>   293

ducts, conduits, handholes, and manholes), consolidating services into
fewer cables, or the performance of other work required to make a pole, anchor,
duct, conduit, manhole, handhole, or right-of-way usable for the initial
placement of Applicant's facilities. As used in this Agreement, the term
"make-ready work" also includes associated planning and engineering work
required to confirm or determine the extent of make-ready work required and to
plan make-ready projects.

         3.27 Manhole. The term "manhole" refers to an enclosure, usually below
ground level and entered through a hole on the surface covered with a cast iron,
cast aluminum, steel, or concrete manhole cover, which personnel may enter and
use for the purpose of installing, operating, and maintaining facilities in
ducts or conduits which are parts of SWBT's conduit system. As used in this
Agreement, the term "manhole" refers only to manhole structures owned or
controlled by SWBT and does not include cables and other telecommunications
equipment located within manhole structures.

         3.28 Occupancy. The term "occupancy" refers to the presence of cables
or other facilities on a pole, in a duct or conduit, or within a right-of-way.

         3.29 Overlashing. The term "overlashing" refers to the practice of
placing an additional cable or inner duct by lashing such cable or inner duct
with spinning wire over an existing cable and strand.

         3.30 Person acting on Applicant's behalf. The terms "person acting on
Applicant's behalf," "personnel performing work on Applicant's behalf," and
similar terms include both natural persons and firms and ventures of every type,
including, but not limited to, corporations, partnerships, limited liability
companies, sole proprietorships, and joint ventures. The terms "person acting on
Applicant's behalf," "personnel performing work on Applicant's behalf," and
similar terms specifically include, but are not limited to, Applicant, its
officers, directors, employees, agents, representatives, attorneys, contractors,
subcontractors, and other persons or entities performing services at the request
of or as directed by Applicant and their respective officers, directors,
employees, agents, and representatives. An authorized contractor selected by
Applicant to perform make-ready work shall be deemed to be a person acting on
Applicant's behalf while performing such work at Applicant's request.

         3.31 Person acting on SWBT's behalf. The terms "person acting on SWBT's
behalf," "personnel performing work on SWBT's behalf," and similar terms include
both natural persons and firms and ventures of every type, including but not
limited to corporations, partnerships, limited liability companies, sole
proprietorships, and joint ventures. The terms "person acting on SWBT's behalf,"
"personnel performing work on SWBT's behalf," and similar terms specifically
include, but are not limited to, SWBT, its officers, directors, employees,
agents, representatives, attorneys, contractors, subcontractors, and other
persons or entities performing services at the request of or as directed by SWBT
and their respective officers, directors, employees, agents, and
representatives. An authorized contractor selected by SWBT to perform make-ready

                                     PAGE 9
<PAGE>   294

work shall be deemed to be a person acting on SWBT's behalf while performing
such work at SWBT's request.

         3.32 Pole. The term "pole" refers to all SWBT poles subject to the Pole
Attachment Act. Except as the context otherwise requires, the term "pole" refers
only to poles (and associated anchors) which are owned or controlled by SWBT and
does not include cables and other telecommunications equipment attached to pole
structures.

         3.33 Pole Attachment. As defined in the Pole Attachment Act, 47 U.S.C.
Section 224(a)(4), the term "pole attachment" refers to "any attachment by a
cable television system or provider of telecommunications service to a pole,
duct, conduit, or right-of-way owned or controlled by a utility." In this
Agreement, except as the context otherwise requires, the term "pole attachment"
refers to any attachment by a cable television system or provider of
telecommunications service to a pole (and associated anchors) owned or
controlled by SWBT. The term "pole attachment" includes all such facilities
attached to or supported by a SWBT pole, including but not limited to cables,
risers and U-guards, equipment boxes, drop wires, anchors, bolts, clamps, drive
rings, guys, hooks, strands, and other hardware affixed to the pole. Groupings
of associated pole attachments for billing purposes shall be consistent with
the Pole Attachment Act and applicable rules, regulations, and commission
orders. Except as otherwise authorized by applicable FCC rules, regulations, or
orders, Applicant's pole attachments occupying the same usable space (or
otherwise associated with facilities occupying the same usable space on a pole)
shall be treated as a single attachment for billing purposes.

         3.34 Pole Attachment Act. The term "Pole Attachment Act" refers to
those provisions of the Communications Act of 1934, as amended by the
Telecommunications Act of 1996, now codified as 47 U.S.C. Section 224, as those
provisions may be amended from time to time.

         3.35 Pre-license survey. The term "pre-license survey" refers to work
and activities performed or to be performed by SWBT or by persons acting on
SWBT's behalf for the primary purpose of:

                (a) confirming or determining the existing availability and
                    capacity of a pole, duct, conduit, or right-of-way and
                    identifying capacity, safety, reliability, or engineering
                    concerns, if any, relating to Applicant's application;

                (b) confirming or determining the extent, if any, to which
                    modifications to SWBT's poles, ducts, conduits, or
                    right-of-ways are required to accommodate Applicant's
                    facilities;

                (c) confirming or determining what make-ready work, if any, will
                    be required to prepare SWBT's poles, ducts, conduits, or
                    rights-of-way to accommodate Applicant's facilities; and

                                    PAGE 10
<PAGE>   295

                (d) estimating the costs, if any, that Applicant will be
                    required to pay for any such facilities modification,
                    capacity expansion, or make-ready work.

         3.36 Pre-occupancy survey. The term "pre-occupancy survey" refers to
work and activities performed or to be performed by Applicant or persons acting
on Applicant's behalf for the primary purpose of enabling Applicant to
determine:

                (a) whether SWBT's poles, ducts, conduits, or rights-of-way, in
                    their existing condition, are suitable for Applicant's
                    intended use;

                (b) the extent, if any, to which modifications of SWBT's poles,
                    ducts, conduits, or rights-of-way will be proposed by
                    Applicant to expand the capacity of SWBT's poles, ducts,
                    conduits, or rights-of-way to accommodate Applicant's
                    facilities; and

                (c) what other capacity expansion or make-ready work, if any,
                    will be proposed by Applicant to prepare SWBT's poles,
                    ducts, conduits, and rights-of-way to accommodate
                    Applicant's facilities.

         3.37 Primary point of contact. The term "primary point of contact"
refers to the persons designated by Applicant and SWBT, respectively, to
coordinate arrangements for Applicant's access to SWBT's poles, ducts, conduits,
and rights-of-way and records relating to such poles, ducts, conduits, and
rights-of-way. SWBT's designated primary point of contact shall be the Utility
Liaison Supervisor unless the parties have arranged for that function to be
performed by a designated account representative who will serve as an
intermediary between Applicant and the Utility Liaison Supervisor.

         3.38 Rights-of-way. The term "rights-of-way" refers to all SWBT
rights-of-way subject to the Pole Attachment Act. In general, rights-of-way are
legal rights to pass over or through property of another party for limited
purposes as defined in a statute, ordinance, easement, grant or other
conveyance. Rights-of-way include but are not limited to (a) public
rights-of-way which SWBT may occupy as permitted by law for the placement of its
facilities (e.g., rights-of-way on, under, or over streets, highways, and other
public roads) and (b) easements or servitudes granted by property owners or
obtained through the exercise of eminent domain authority authorizing SWBT to
pass over, place facilities on, and have rights of ingress and egress to the
property of such property owners. Rights-of-way may also include easements
which, at the time of land development or subdivision, were dedicated for use by
public or private utilities and are being occupied, in whole or in part, by
SWBT's facilities. Except as the context otherwise requires, the term
"rights-of-way" as used in this Agreement refers only to rights-of-way owned or
controlled by SWBT and does not include (a) cables and other telecommunications
equipment buried or located on such rights-of-way, (b) public rights of way
(which are owned by and subject to the control of governmental entities), or (c)

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any space which is owned and controlled by a third-party property owner and
occupied by SWBT with permission from such owner rather than as a matter of
legal right. As used in this Agreement, the term "right-of-way" may also include
certain fee-owned or leased property acquired by SWBT for the specific purpose
of installing poles, ducts, or conduits or burying underground cables which are
part of SWBT's network distribution facilities.

         3.39 Sheath. The term "sheath" refers to an enclosed covering
containing communications wires, fibers, or other communications media. A cable
may include both inner and outer sheaths.

         3.40 Spinning. The term "spinning" refers to a method of attaching a
cable or inner duct to a supporting strand. "Spinning" is sometimes referred to
as "lashing."

         3.41   State.  When capitalized, the term "State" (as used in terms 
such as "this State") refers to the State of Arkansas.
                  

         3.42   State Commission.  The term "State Commission" refers to the 
Arkansas Public Service Commission.

         3.43 Strand. The term "strand" refers to support wires, typically
stranded together, or other devices attached to a pole and connecting that pole
to an anchor or to another pole for the purpose of increasing pole stability or
supporting wires, cables, and associated facilities. The term "strand" includes,
but is not limited to, strands sometimes referred to as "anchor strands,"
"anchor/guy strands," "down guys," "guy strands," "pole-to-pole guys," and
"messengers."

         3.44   Telecommunications Act of 1996.  The term "Telecommunications 
Act of 1996" refers to the Telecommunications Act of 1996, Pub. L. No. 104-104, 
110 Stat. 56, enacted February 8, 1996.

         3.45 Third party. The terms "third party" and "third parties" refer to
persons and entities other than the parties to this Agreement (that is, persons
and entities other than Applicant and SWBT).

         3.46 Utility Liaison Supervisor ("ULS"). The terms "Utility Liaison
Supervisor" and "ULS" refer to the person or persons designated by SWBT to be
responsible for handling and processing requests for access to SWBT's poles,
ducts, conduits, and rights-of-way in this State. The term "ULS" connotes
responsibility for handling a function and is not a job title. Except as
otherwise specifically provided in this Agreement or in the parties'
interconnection agreement, if any, the ULS shall serve as Applicant's single
point of contact for arranging access to SWBT's poles, ducts, conduits, and
rights-of-way and access to SWBT's records relating to SWBT's poles, ducts,
conduits, and rights-of-way. The Utility Liaison Supervisor for this State is
identified in APPENDIX VIII.

                                    PAGE 12
<PAGE>   297

         3.47 Vault. The term "vault" includes central office vaults and
controlled environment vaults ("CEVs"). Vaults may be connected to, but are not
considered part of, SWBT's conduit system. Access, if any, to vaults (and to
ducts, conduits, and risers which serve no purpose other than to provide a means
of entry to and exit from such vaults) shall be governed by the tariffs,
agreements, or commission orders, if any, establishing arrangements for
interconnection, collocation, and access to unbundled network elements, and not
by this Agreement.

         3.48 "Vicinity of ...". When used in terms such as "vicinity of SWBT's
conduit system," "vicinity of SWBT's poles," "vicinity of SWBT's rights-of-way,"
or "vicinity of SWBT's poles, ducts, conduits, or rights-of-way," the term
"vicinity of ..." includes sites on, within, near to, surrounding, or adjoining
SWBT's poles, ducts, conduits, and rights-of-way. These sites include, but are
not limited to, all sites within a distance of 10 feet of any SWBT pole, duct,
conduit, or right-of-way.

                    ARTICLE 4: NATURE AND SCOPE OF AGREEMENT

         4.01 Scope of Agreement. This Agreement establishes the rates, terms,
conditions, and procedures for access to SWBT's poles, ducts, conduits, and
rights-of-way located within this State, without regard to whether such poles,
ducts, conduits, or rights-of-way are located on public or private property;
provided, however, that nothing contained in this Agreement shall be construed
as a grant of access to any facilities which are not poles, ducts, conduits, or
rights-of-way subject to the Pole Attachment Act or to any poles, ducts,
conduits, rights-of-way, facilities, or property owned and controlled by parties
other than SWBT. Separate tariffs or agreements, including other portions of the
parties' interconnection agreement, and not this Agreement, shall govern
Applicant's access, if any, to the following facilities which require special
security, technical, and construction arrangements outside the scope of this
Agreement:

                (a) SWBT's central office vaults and ducts and conduits which
                    serve no purpose other than to provide a means of entry to
                    and exit from SWBT's central offices;

                (b) controlled environment vaults (CEVs), huts, cabinets, and
                    other similar outside plant structures and ducts and
                    conduits which serve no purpose other than to provide a
                    means of entry to and exit from such vaults, huts, cabinets,
                    and structures;

                (c) ducts and conduits located within buildings owned by SWBT;
                    and

                (d) ducts, conduits, equipment rooms, and similar spaces located
                    in space leased by SWBT from third-party property owners for
                    purposes other than to house cables and other equipment in
                    active service as part of SWBT's network distribution
                    operations.

                                    PAGE 13

<PAGE>   298

         4.02 No Transfer of Property Rights to Applicant. Nothing contained in
this Agreement or any license subject to this Agreement shall create or vest (or
be construed as creating or vesting) in either party any right, title, or
interest in or to any real or personal property owned by the other. The payment
of fees and charges as provided by this Agreement and licenses subject to this
Agreement shall not create or vest (or be construed as creating or vesting) in
either party any right, title, or interest in or to any real or personal
property owned by the other. No use, however extended, of SWBT's poles, ducts,
conduits, or rights-of-way shall create or vest (or be construed as creating or
vesting) in Applicant any right, title, or interest in or to any real or
personal property owned by SWBT, and the placement of Applicant's facilities on
or in SWBT's poles, ducts, conduits and rights-of-way shall not create or vest
in SWBT any right, title, or interest in such facilities.

         4.03 No Effect on SWBT's Right to Abandon, Convey or Transfer Poles,
Ducts, Conduits, or Rights-of-Way. Except as provided in subsections (a)-(d) of
this section, nothing contained in this Agreement or any license subject to this
Agreement shall in any way affect SWBT's right to abandon, convey, or transfer
to any other person or entity SWBT's interest in any of SWBT's poles, ducts,
conduits, or rights-of-way.

                (a) SWBT shall give Applicant no less than 60 days written
                    notice prior to abandoning, conveying, or transferring any
                    pole, duct, conduit, or right-of-way (1) to or in which
                    Applicant has attached or placed facilities pursuant to this
                    Agreement or (2) with respect to which Applicant has been
                    assigned pole attachment or conduit occupancy space. The
                    notice shall identify the transferee, if any, to whom any
                    such pole, duct, conduit, or right-of-way is to be conveyed
                    or transferred.

                (b) SWBT represents that prior to the effective date of this
                    Agreement, and prior to enactment of the Telecommunications
                    Act of 1996, SWBT entered into one or more "joint use pole
                    agreements" with electric utilities located in this State
                    and that such agreements may require SWBT to transfer or
                    convey poles to such electric utilities from time to time.
                    Nothing contained in this Agreement shall abridge the rights
                    of SWBT or any electric utility under any contract executed
                    prior to the effective date of this Agreement. In the event
                    of any transfer or conveyance of poles to an electric
                    utility pursuant to such a joint pole agreement, SWBT will,
                    at Applicant's request, provide Applicant and the transferee
                    utility with such information as may be necessary to
                    minimize any burdens to Applicant which may arise out of or
                    in connection with the transfer or conveyance.

                (c) Transfers of SWBT's poles, ducts, conduits, and
                    rights-of-way shall be subject to Applicant's rights at the
                    time of transfer. Applicant shall, at the request of SWBT or
                    the transferee, provide SWBT or the transferee with all
                    information required to assess Applicant's rights,
                    post-transfer 

                                    PAGE 14
<PAGE>   299

                    intentions with respect to continued occupancy, and
                    willingness to negotiate new rates, terms, and conditions of
                    access. Applicant shall not unreasonably refuse to negotiate
                    with the transferee. If the transferee itself is a local
                    exchange carrier or other utility subject to the Pole
                    Attachment Act, Applicant shall, at the request of the
                    transferee, negotiate in good faith new rates, terms, and
                    conditions of access.

                (d) Transfers or conveyances of poles, ducts, conduits, or
                    rights-of-way to any entity controlling, controlled by, or
                    under common control with SWBT or to any entity which
                    acquires or succeeds to ownership of substantially all of
                    SWBT's assets shall be subject to Applicant's rights under
                    this Agreement and licenses subject to this Agreement.

         4.04 No Effect on SWBT's Rights to Manage its Poles, Ducts, Conduits,
and Rights-of-Way. Subject to Applicant's rights under this Agreement and
applicable federal and state laws, rules, regulations, and commission orders,   
including, but not limited to, 47 C.F.R. Section 1.1403 (requiring 60 days' 
notice of contemplated modifications), SWBT may (a) locate, relocate, move,
replace, modify, maintain, and remove all poles, ducts, conduits, and
rights-of-way subject to this Agreement at any time and in any manner as SWBT
deems appropriate and (b) enter into new agreements or arrangements with other
persons or entities permitting them to attach facilities to SWBT's poles or
place facilities in or on SWBT's ducts, conduits, or rights-of-way.

         4.05 No Right to Interfere. Except to the extent expressly provided by
the provisions of this Agreement, the provisions of this Agreement shall not be
construed as authorizing either party to this Agreement, or persons acting on
their behalf, to rearrange or interfere in any way with (a) the facilities of
the other party or joint users, (b) the use of or access to such facilities by
the other party or joint users, or (c) the ability of either party or joint
users to conduct normal business operations, serve their respective customers,
or avail themselves of new business opportunities.

         4.06 Required Franchises, Permits, Certificates, and Licenses. This
Agreement shall not be construed as relieving either party from any obligations
it may have to obtain legal authority to construct, operate, maintain, repair,
and remove its facilities on public or private property (including but not
limited to any required franchises, permits, certificates, licenses, easements,
or the like) from all appropriate public authorities and private persons or
entities.

         4.07 DISCLAIMER OF WARRANTIES. SWBT MAKES NO REPRESENTATIONS THAT
SWBT'S POLES, DUCTS, CONDUITS, OR RIGHTS-OF-WAY ARE SUITABLE FOR APPLICANT'S
INTENDED USES. SWBT MAKES NO WARRANTIES, EXPRESS OR IMPLIED, OF MERCHANTABILITY
OR FITNESS FOR A PARTICULAR PURPOSE. IN THIS AGREEMENT, SWBT MAKES NO IMPLIED
WARRANTIES OF ANY KIND.

                                    PAGE 15
<PAGE>   300

         4.08 Third-party Beneficiaries. Except as may be specifically set forth
in this Agreement, this Agreement does not provide and shall not be construed to
provide third parties with any remedy, claim, liability, reimbursement, cause of
action, or other privilege.

                       ARTICLE 5: ACCESS TO RIGHTS-OF-WAY

         5.01 Public Rights-of-Way. SWBT and Applicant agree that neither party
has the right to restrict or interfere with the other party's lawful access to
and use of public rights-of-way, including public rights-of-way which pass over
property owned by either party. Except as otherwise specifically provided in
this Agreement, SWBT and Applicant shall each be responsible for obtaining their
own rights-of-way and permission to use real or personal property owned or
controlled by any governmental body.

         5.02 Private Rights-of-Way Not Owned or Controlled by Either Party.
SWBT and Applicant agree that neither party shall restrict or interfere with the
other party's access to or right to occupy property owned by third-parties which
is not subject to the other party's control, including property as to which
either party has access subject to non-exclusive rights-of-way. Subject to the
procedures set forth in Section 5.04 below, each party shall make its own,
independent legal assessment of its right to enter upon or use the property of
third-party property owners and shall bear all expenses, including legal
expenses, involved in making such determinations.

         5.03 Access to Rights-of-Way Generally. Each pole attachment and
conduit occupancy assignment or license made, issued, or subject to this
Agreement shall include access to and use of all associated rights-of-way
including, but not limited to, rights-of-way required by Applicant for ingress,
egress, or other access to any sites where SWBT's poles or any part of SWBT's
conduit system are located, but only to the extent, if any, that SWBT has the
legal authority to grant such access and use. At locations where SWBT has access
to third-party property pursuant to non-exclusive rights-of-way, SWBT shall not
interfere with Applicant's negotiations with third-party property owners for
similar access or with Applicant's access to such property pursuant to easements
or other rights-of-ways obtained by Applicant from the property owner; provided,
however, that neither party shall conduct activities on such right-of-way which
interfere with the facilities of the other party or with the other party's
access to and use of its own facilities. At locations where SWBT has obtained
exclusive rights-of-way from third-party property owners or otherwise controls
the right-of-way, SWBT shall, to the extent space is available, and subject to
reasonable safety, reliability, and engineering conditions, provide access to
Applicant and third parties on a nondiscriminatory, first-come, first-served
basis, provided that the underlying agreement with the property owner permits
SWBT to provide such access, and provided further that Applicant agrees to
indemnify, on request defend, and hold SWBT harmless from any injury, loss,
damage, claim, or liability arising out of or in connection with such access or
use. Such access shall be granted, on a case-by-case basis, in the form of a
license, sublicense, sub-easement, or other mutually acceptable writing. Except
as otherwise agreed to by the parties, SWBT's 

                                    PAGE 16
<PAGE>   301

charges for such access (obtained from SWBT rather than from the third-party
property owner) shall include (a) a pro rata portion of the charges (including
but not limited to one-time charges and recurring charges), if any, paid by SWBT
to obtain the right-of-way plus (b) any other documented legal, administrative,
and engineering costs incurred by SWBT in obtaining the right-of-way and
processing Applicant's request for access. Applicant's pro rata portion of the
charge paid by SWBT shall be negotiated on a case-by-case basis and shall take
into account the size of the area used by Applicant and the number of users
occupying the right-of-way.

         5.04 Special Procedures for Obtaining Access to Third-party Property.
Although SWBT will afford access to rights-of-way owned or controlled by it and
permit Applicant to utilize SWBT's rights-of-way to the extent that SWBT has
legal authority to do so, Applicant acknowledges that SWBT may not own or
control certain rights-of-way to the extent necessary to permit Applicant full
access to such rights-of-way. The following general principles shall be applied
with respect to access to rights-of-way on third-party property in those
situations in which SWBT does not have authority to permit Applicant access or
either party has a good faith belief that SWBT does not have such authority:

                (a) Applicant will first attempt to obtain right-of-way directly
                    from the property owner.

                (b) If Applicant has the right of eminent domain under state
                    law, Applicant will independently attempt to obtain the
                    right-of-way it seeks through the exercise of that right.

                (c) If Applicant is unable to obtain access to a right-of-way
                    under subsections (a) or (b) above, Applicant may request in
                    writing that SWBT exercise its right of eminent domain to
                    condemn the right-of-way for Applicant's use and SWBT will
                    respond to Applicant's written request within 45 days. SWBT
                    will exercise its right of eminent domain on Applicant's
                    behalf only if permitted to do so under applicable state
                    law, and only if Applicant agrees to bear all costs and
                    expenses, including but not limited to legal fees, arising
                    out of or in connection with the condemnation proceedings.

         5.05 Access to Rights-of-Way Incident to the Use of CEVs and Similar
Structures. SWBT will provide Applicant nondiscriminatory access, consistent
with the requirements of the Pole Attachment Act and Telecommunications Act of
1996, and as provided in Sections 5.03 and 5.04 above, to rights-of-way
containing Controlled Environment Vaults (CEVs), huts, cabinets, and other
similar structures. SWBT will place no restrictions on access to such
rights-of-way that are more restrictive than those SWBT places on itself;
provided, however, that neither party shall conduct activities on such
rights-of-way which interfere with the facilities of the other party, with the
privacy of communications carried over the other party's network, or with the
other party's access to and use of its own facilities. This section relates only
to access to rights-of-way and 
                                    PAGE 17

<PAGE>   302

shall not be construed as granting access to the CEVs, huts, cabinets, and
similar structures located on such rights-of-way. Access, if any, to CEVs, huts,
cabinets, and similar structures, and to ducts, conduits, and risers which serve
no purpose other than to provide a means of entering or exiting such structures,
shall be governed by the tariff, agreement, or order, if any, granting Applicant
access to such structures.

         5.06 Access to Building Entrance Facilities, Building Distribution
Facilities, and Equipment Rooms. The parties acknowledge that ownership and
control of building entrance and distribution ducts, building entrance and
distribution conduits, building entrance and building distribution space,
equipment rooms, equipment closets, mechanical rooms, telephone communications
rooms, and similar spaces will vary from location to location and that the
respective rights of third-party property owners, tenants in buildings owned by
third-party property owners, telecommunications carriers, cable television
systems, and other providers of telecommunications services with respect to such
ducts, conduits, and spaces must be determined on a case-by-case basis. Each
party shall, when feasible, directly obtain from third-party property owners
such access to building entrance and building distribution ducts, building
entrance and building distribution conduits, building entrance and distribution
space, equipment rooms, equipment closets, mechanical rooms, telephone
communications rooms, and other similar areas as may be needed by such party to
serve the building owner and tenants located within buildings owned by third
parties or to access other space in the building occupied or to be occupied by
such party. In those situations in which Applicant cannot obtain from the
building owner access on terms satisfactory to Applicant, Applicant may request
access from SWBT as provided in Sections 5.03-5.04 of this Agreement; provided,
however, that a separate, building-specific notice of intent to occupy under
Section 8.02(b) or license application under Section 9.02, including such
additional information as may be necessary to identify the space to be occupied
and the facilities to be placed in such space, shall be required for access to
the facilities and space subject to this section. Any such notice or application
shall conspicuously note on its face that access to building entrance or
building distribution facilities or space is being sought. Applicant
acknowledges that SWBT must, before providing access to building space and
facilities located on or within third-party property, review applicable legal
documents and physical arrangements relating to the property, including physical
arrangements within the building. Upon completion of that review, SWBT will
notify Applicant whether Applicant's request can be granted under this
Agreement, will require access arrangements under a tariff or other applicable
agreement, or will require other special handling (e.g., direct negotiations
with the third-party property owner). Pending such notice, Applicant may not
occupy any duct, conduit, or space subject to this section pursuant to Section
8.03 without SWBT's express written consent but may exercise occupancy rights
obtained directly from the building owner. If SWBT has lawful authority to
provide such access and is required by the Pole Attachment Act to do so, SWBT
shall provide Applicant access under this Agreement. Such access shall be
negotiated on a case-by-case basis taking into account any special legal,
technical, security, or construction considerations applicable to the ducts,
conduits, or space which Applicant seeks to access. Such access, when provided,
shall only include access to 

                                    PAGE 18
<PAGE>   303

ducts, conduits, and available space (as distinguished from access to cables and
other equipment not subject to the Pole Attachment Act). Such access shall be
subject to such reasonable terms and conditions as may be appropriate to protect
the equipment and other property of the parties and third parties, the
reliability of the parties' networks and the networks of third parties, and the
privacy of communications carried over the parties' networks and networks of
third parties.

                (a) Applicant's access, if any, to building entrance ducts and
                    building entrance conduits entering SWBT-owned buildings
                    (including but not limited to central offices) and access,
                    if any, to other building entrance and building distribution
                    facilities and space located within such buildings shall be
                    arranged under and shall be subject to tariffs, agreements,
                    and, if applicable, commission or court orders establishing
                    such access rights rather than this Agreement.

                (b) Applicant's access to and use of building entrance ducts,
                    building entrance conduits, building entrance space, and
                    other building entrance facilities owned and controlled by
                    third-parties shall be obtained by Applicant through direct
                    negotiations between Applicant and the third-party property
                    owners who own and control access to such facilities. If
                    SWBT owns a building entrance duct, building entrance
                    conduit, or other building entrance space, or if SWBT has
                    sufficient control over a building entrance duct, building
                    entrance conduit, or other building entrance space to permit
                    other telecommunications carriers or cable television
                    systems to have access to such ducts, conduits, or space
                    without approval or consent from the third-party property
                    owner, SWBT shall, if adequate capacity is available, and
                    subject to reasonable safety, reliability, and engineering
                    conditions, provide access to Applicant and other
                    telecommunications carriers and cable television systems on
                    a nondiscriminatory, first-come, first-served basis;
                    provided, however, that Applicant agrees to indemnify, on
                    request defend, and hold SWBT harmless from any injury,
                    loss, damage, claim or liability arising out of or in
                    connection with Applicant's access to or use of such
                    building entrance ducts, building entrance conduits, or
                    other building entrance space. Such access shall be granted,
                    on a case-by-case basis, in the form of a license,
                    sublicense, easement, sub-easement, or other mutually
                    acceptable writing and shall not include access to or the
                    right to use SWBT's cables or other SWBT telecommunications
                    equipment occupying such ducts, conduits, or space. Except
                    as otherwise agreed to by the parties, SWBT's charge for
                    such access (obtained from SWBT rather than from the
                    third-party property owner) shall include (1) a pro rata
                    portion of all charges (including but not limited to
                    one-time charges and recurring charges), if any, paid by
                    SWBT to obtain the building entrance duct, building entrance
                    conduit, or building entrance space and (2) any other
                    documented legal, administrative, engineering costs and

                                    PAGE 19
<PAGE>   304

                    construction costs incurred by SWBT to obtain such duct,
                    conduit, or space, process Applicant's request for access,
                    or prepare the facilities for Applicant's occupancy or use.
                    SWBT's charges to Applicant under this subsection shall be
                    calculated and negotiated on a case-by-case basis.

                (c) Applicant's access to and use of building distribution
                    ducts, building distribution conduits, building distribution
                    space, and other building distribution facilities owned and
                    controlled by third-parties shall be obtained by Applicant
                    through direct negotiations between Applicant and the
                    third-party property owners who own and control access to
                    such facilities. If SWBT owns a building distribution duct,
                    building distribution conduit, or other building
                    distribution space, or if SWBT has sufficient control over a
                    building distribution duct, building distribution conduit,
                    or other building distribution space to permit other
                    telecommunications carriers or cable television systems to
                    have access to such duct, conduit, or space without approval
                    or consent from the third-party property owner, SWBT shall,
                    if adequate capacity is available, and subject to reasonable
                    safety, reliability, and engineering conditions, provide
                    access to Applicant and other telecommunications carriers
                    and cable television systems on a nondiscriminatory,
                    first-come, first-served basis; provided, however, that
                    Applicant agrees to indemnify, on request defend, and hold
                    SWBT harmless from any injury, loss, damage, claim or
                    liability arising out of or in connection with Applicant's
                    access to or use of such building distribution ducts,
                    building distribution conduits, or other building
                    distribution space. Such access shall be granted, on a
                    case-by-case basis, in the form of a license, sublicense,
                    easement, sub-easement, or other mutually acceptable writing
                    and shall not include access to or the right to use SWBT's
                    cables or other SWBT telecommunications equipment occupying
                    such ducts, conduits, or space. Except as otherwise agreed
                    to by the parties, SWBT's charges for such access (obtained
                    from SWBT rather than from the third-party property owner)
                    shall include (1) a pro rata portion of all charges
                    (including but not limited to one-time charges and recurring
                    charges) paid by SWBT to obtain the building distribution
                    duct, building distribution conduit, or building
                    distribution space and (2) any other documented legal,
                    administrative, engineering costs and construction costs
                    incurred by SWBT to obtain such duct, conduit, or space,
                    process Applicant's request for access, or prepare the
                    facilities for Applicant's occupancy or use. SWBT's charges
                    to Applicant under this subsection shall be calculated and
                    negotiated on a case-by-case basis.

                (d) Access to equipment rooms, equipment closets, mechanical
                    rooms, telephone communications rooms, and similar areas
                    located in buildings owned and controlled by third-parties
                    shall be subject to access as provided in subsection (c);
                    provided, however, that when any such room 

                                    PAGE 20

<PAGE>   305

                    or space is leased to SWBT on an exclusive basis (as may be
                    the case if the room or space will be used to house remote
                    switching equipment, pair gain equipment, or other network
                    equipment used to provide or support telecommunications
                    services to customers at locations outside the building in
                    which such room is located), access, if any, shall be also
                    subject to facilities collocation tariffs, agreements, or
                    arrangements.

                (e) Nothing contained in this section shall be construed as
                    authorizing Applicant to occupy space owned or controlled by
                    third parties or to utilize third-party facilities or
                    property without permission or authority from the owner of
                    such property, where such permission or authority is
                    required. Neither this section nor any license or permission
                    granted under or subject to this section shall be construed
                    as a representation by SWBT to Applicant that Applicant has
                    the right to have access to or occupy any duct, conduit, or
                    space owned and controlled by a third-party property owner
                    or to utilize any telecommunications equipment owned or
                    controlled by SWBT or any third party (including but not
                    limited to owner- or tenant-owned cables, wires, and
                    equipment located on the customer side of any network
                    interface device).

                (f) If Applicant has been granted access to a building entrance
                    or building distribution duct, conduit, or space pursuant to
                    this section, Applicant shall, at SWBT's request, relinquish
                    such access to SWBT if it is subsequently determined that
                    Applicant's use of such space will preclude SWBT from
                    meeting carrier- or provider-of-last-resort obligations to
                    customers on the premises affected.

                            ARTICLE 6: SPECIFICATIONS

         6.01 Compliance with Requirements, Specifications, and Standards.
Applicant agrees that Applicant's facilities attached to SWBT's poles or
occupying space in SWBT's ducts, conduits, and rights-of-way shall be attached,
placed, constructed, maintained, repaired, and removed in full compliance with
the requirements, specifications, and standards specified in this Agreement.

         6.02 Design to Minimize the Need for Access to SWBT's Poles, Ducts, and
Conduits. The parties shall each design their facilities to minimize the need
for the parties to access SWBT's poles, ducts, and conduits.

         6.03 Infrequent Construction Techniques and Connectivity Solutions.
Unless precluded by documented engineering criteria or written guidelines SWBT
applied to itself as of January 1, 1996, and consistent with considerations of
safety, reliability, and sound engineering practice, SWBT will permit Applicant
at its own expense to utilize the following techniques to avoid high or unusual
expenditures: (a) placement of pole attachments on both the "field" side and
"road" side of a pole; (b) placement of extension 


                                    PAGE 21
<PAGE>   306

arms or stand-off brackets on poles; and (c) building conduit branches into
SWBT's conduit systems. Applicant acknowledges that use of the above techniques
will be rare, will be permitted only on a case-by-case basis, and must be
performed in a manner which does not jeopardize the structural integrity of
SWBT's facilities, the safety of personnel working on or in SWBT's poles, ducts,
or conduits, and does not render unusable other available space on the pole or
in the duct or conduit. Except as otherwise agreed to by the parties in writing,
extension arms or stand-off brackets, if utilized, shall be installed as
make-ready work in accordance with SWBT's specifications and at Applicant's
expense. Once installed, extension arms and stand-off brackets shall become part
of the pole and shall be owned by SWBT. Unused capacity on any such extension
arms or stand-off brackets shall be deemed "available" (as defined in Section
3.07) for assignment.

         6.04 Published Standards. SWBT and Applicant agree that the following
standards equally apply to either party with respect to facilities attached to
or placed in SWBT's poles, ducts, conduits, and rights-of-way and further agree
that facilities shall be placed, constructed, maintained, repaired, and removed
in accordance with current (as of the date when such work is performed) editions
of the following publications:

                (a) the Blue Book Manual of Construction Procedures, Special 
                    Report SR-TAP-001421, published by Bell Communications
                    Research, Inc. ("Bellcore"), and sometimes referred to as
                    the "Blue Book";

                (b) the National Electrical Safety Code ("NESC"), published by 
                    the Institute of Electrical and Electronic Engineers, Inc.
                    ("IEEE"); and

                (c) the National Electrical Code ("NEC"), published by the
                    National Fire Protection Association ("NFPA").

         6.05 Additional Electrical Design Specifications: Conduit. The parties
agree that, in addition to the specifications and requirements referred to in
Sections 6.01-6.04 above, facilities placed in SWBT's conduit system after the
effective date of this Agreement shall meet the electrical design specifications
set forth in this section.

                (a) No facilities shall be placed in SWBT's conduit system in
                    violation of FCC regulations, including regulations relating
                    to electrical interference. In addition, neither party shall
                    place any facility in SWBT's conduit system which causes or
                    may cause electrical interference with the facilities of the
                    other party or joint users sufficient to jeopardize network
                    integrity or degrade the quality of any communications
                    services offered by either party or a joint user. If either
                    party is notified by the other party or a joint user that
                    its facilities are causing, or have the potential to cause,
                    unacceptable levels of electrical interference, the party
                    notified shall either correct the problem, remove the
                    facility, or initiate good faith negotiations with the
                    complaining party or joint user to resolve the issue.
       
                                     PAGE 22
<PAGE>   307

                (b) Facilities placed in SWBT's conduit system shall not be
                    designed to use the earth as the sole conductor for any part
                    of the circuits.

                (c) Facilities placed in SWBT's conduit system and carrying more
                    than 50 volts AC (rms) to ground or 135 volts DC to ground
                    shall be enclosed in an effectively grounded sheath or
                    shield.

                (d) No coaxial cable shall be placed in SWBT's conduit system
                    unless such cable meets the voltage limitations of Article
                    820 of the National Electrical Code.

                (e) Coaxial cable placed in SWBT's conduit system may carry
                    continuous DC voltages up to 1800 volts to ground where the
                    conductor current will not exceed one-half ampere and where
                    such cable has two separate grounded metal sheaths or
                    shields and a suitable insulating jacket over the outer
                    sheath or shield. The power supply shall be so designed and
                    maintained that the total current carried over the outer
                    sheath shall not exceed 200 microamperes under normal
                    conditions. Conditions which would increase the current over
                    this level shall be cleared promptly.

                (f) The integrity of SWBT's conduit system and overall safety of
                    personnel require that "dielectric cable" be used within
                    SWBT's conduit system when a cable facility utilizes a duct
                    or route shared in the same trench by any electric
                    transmission facilities such as the facilities of a power
                    utility.

         6.06   Additional Physical Design Specifications: Conduit.  Facilities 
placed in SWBT's conduit system following the effective date of this Agreement 
shall meet all of the following physical design specifications:

                (a) Except as otherwise specifically agreed in this Agreement or
                    licenses subject to this Agreement, Applicant's facilities
                    shall enter SWBT's conduit system at locations consistent
                    with the physical design specifications that SWBT applies to
                    itself (typically through a manhole) or at such other
                    designated locations agreed upon in writing (e.g., through
                    the licensing process) by the parties in accordance with
                    Section 6.03 (infrequent construction techniques and
                    connectivity solutions).

                (b) Cables bound or wrapped with cloth or having any kind of
                    fibrous coverings or impregnated with an adhesive material
                    shall not be placed in SWBT's conduit or ducts.

                (c) Neither party shall circumvent the corrosion mitigation
                    measures of the other party or joint users.

                                    PAGE 23


<PAGE>   308

                (d) New construction splices in cables (including but not
                    limited to fiber optic and twisted pair cables) shall be
                    located in manholes, pull boxes or handholes.

         6.07 Efficient Use of Conduit. To ensure efficient use of conduits,
SWBT will, when cable diameters permit, install inner ducts in multiples that
fully utilize duct space (typically three or four inner ducts in a full
four-inch duct) as needed for SWBT's own business purposes and to accommodate
Applicant and other joint users; provided, however, that SWBT will not be
required to install inner duct in advance of need or in anticipation of
potential future requests for access by Applicant and other joint users. In
addition, the parties shall, in accordance with SWBT's duct selection standards,
install cables in inner duct when cable diameters permit.

         6.08 Specifications Applicable to Connections: Conduit. Except as
otherwise specifically agreed in this Agreement or licenses subject to this
Agreement, or as mutually agreed upon by the parties in writing, the following
specifications apply to connections of Applicant's ducts and conduits to SWBT's
conduit system:

                (a) Applicant shall not bore, make, or enlarge any hole in, or
                    otherwise structurally modify or alter any manhole,
                    handhole, duct, conduit, or other facility which is part of
                    SWBT's conduit system except as provided in this Agreement,
                    in licenses subject to this Agreement, or as mutually agreed
                    upon by the parties in writing.

                (b) Nothing contained in subsection (a) shall be construed as
                    precluding Applicant or qualified personnel acting on
                    Applicant's behalf from reattaching cable racks or
                    performing similar routine work which is minor in nature and
                    associated with the placement and splicing of Applicant's
                    cable.

                (c) Where Applicant's duct or facility physically connects with
                    SWBT's conduit system, the section of Applicant's duct or
                    facility which connects to SWBT's conduit system shall be
                    installed by SWBT or its contractor at Applicant's expense
                    (which will be SWBT's actual costs or the price charged SWBT
                    by the contractor performing such work). SWBT will perform
                    this work in an interval consistent with the intervals SWBT
                    performs the same or similar types of work for itself. If
                    SWBT's interval for beginning or completing this work does
                    not meet Applicant's needs, Applicant may arrange for the
                    work to be performed by an authorized contractor selected by
                    Applicant from a list, jointly developed by Applicant and
                    SWBT, of mutually agreed contractors qualified to perform
                    such work. Work performed by an authorized contractor
                    selected by Applicant to perform work under this subsection
                    shall be performed in accordance with both parties'
                    specifications and in accordance with both parties'
                    standards and practices. Each party shall 

                                    PAGE 24
<PAGE>   309

                    indemnify, on request defend, and hold the other party
                    harmless from any injuries, losses, damages, claims, or
                    liabilities resulting from the performance of work by the
                    indemnifying party or by persons acting on the indemnifying
                    party's behalf under this subsection.

                (d) SWBT will have the option to monitor the entrance and exit
                    of Applicant's facilities into SWBT's conduit system and the
                    physical placement of Applicant's facilities in and removal
                    of such facilities from any part of SWBT's conduit system.
                    Notice requirements for such monitoring are addressed in
                    Section 6.11 of this Agreement.

                (e) If Applicant constructs or utilizes a duct (other than a
                    duct owned or controlled by SWBT) which is connected to
                    SWBT's conduit system, the duct and all connections between
                    that duct and SWBT's conduit system shall be sealed to
                    prevent the entry of gases or liquids into SWBT's conduit
                    system. If Applicant's duct enters a building, it shall also
                    be sealed where it enters the building and at all other
                    locations necessary to prevent the entry of gases and
                    liquids into SWBT's conduit system.

         6.09 General Requirements Relating to Personnel, Equipment, Materials,
and Public Safety. Except as otherwise specifically provided in this Agreement,
Applicant shall be responsible for selecting the employees and contractors who
will perform work on Applicant's behalf on, within, and in the vicinity of
SWBT's poles, ducts, conduits, and rights-of-way. Applicant, its contractors,
subcontractors, and other vendors acting on Applicant's behalf shall also be
responsible for selecting the personnel who perform work on Applicant's behalf
at such sites, directing the work performed by such personnel, compensating
their respective employees, and complying with all applicable laws, rules,
regulations, and agency orders relating to withholding taxes, social security
taxes, and other employment-related taxes. The provisions of this section are
intended to protect the integrity of the networks, facilities and operations of
SWBT, Applicant and joint users, to protect the health and safety of persons
working on, within, or in the vicinity of SWBT's poles, ducts, conduits, and
rights-of-way, to assure the financial responsibility of all persons and
entities performing work on, within, or in the vicinity of SWBT's poles, ducts,
conduits, and rights-of-way, and to protect the public at large. The
requirements of this section (other than the provisions of subsection (h)) shall
be reciprocal and shall apply to SWBT and personnel acting on SWBT's behalf to
the same extent they apply to Applicant.

                (a) Contractors, subcontractors, and other vendors, including
                    authorized contractors, performing work on Applicant's
                    behalf on, within, or in the vicinity of SWBT's poles,
                    ducts, conduits, or rights-of-way shall meet the same
                    financial responsibility (insurance and bonding)
                    requirements generally applicable to contractors,
                    subcontractors, and vendors performing work on SWBT's behalf
                    on, within, or in the vicinity of such 

                                    PAGE 25
<PAGE>   310

                    poles, ducts, conduits, or rights-of-way. SWBT shall advise
                    Applicant of SWBT's requirements and any changes in such
                    requirements. Applicant shall be solely responsible for
                    assuring compliance with such requirements by contractors,
                    subcontractors, and other vendors acting on Applicant's
                    behalf and shall be liable to SWBT for any injury, loss, or
                    damage suffered by SWBT as a result of its failure to do so.

                (b) Only properly trained persons shall work on, within, or in
                    the vicinity of SWBT's poles, ducts, conduits, and
                    rights-of-way. Applicant shall be responsible for
                    determining that all such persons acting on Applicant's
                    behalf have proper training.

                (c) Neither Applicant nor any person acting on Applicant's
                    behalf shall permit any person to climb or work on SWBT's
                    poles or in the vicinity of SWBT's poles, or enter SWBT's
                    manholes or work within or in the vicinity of SWBT's conduit
                    system, unless such person has the training, skill, and
                    experience required to recognize potentially dangerous
                    conditions relating to the pole or conduit system and to
                    perform the work safely.

                (d) Neither Applicant nor any person acting on Applicant's
                    behalf shall permit any person acting on Applicant's behalf
                    to perform any work on, within, or in the vicinity of SWBT's
                    poles, ducts, conduits, or rights-of-way without first
                    verifying, to the extent practicable, on each date when such
                    work is to be performed, that conditions at the work site
                    (including but not limited to the physical condition of the
                    pole or any part of SWBT's conduit system) are sufficiently
                    safe for the work to be performed. If Applicant or any
                    person acting on Applicant's behalf determines that the
                    condition of any pole, duct, conduit, conduit system, or
                    right-of-way is not safe enough for the work to be
                    performed, Applicant shall notify SWBT of conditions at the
                    site and shall not proceed with the work until Applicant is
                    satisfied that the work can be safely performed.

                (e) Neither Applicant nor any person acting on Applicant's
                    behalf shall knowingly permit defective equipment or
                    materials to be used on, within, or in the vicinity of
                    SWBT's poles, ducts, conduits, or rights-of-way.

                (f) When Applicant or personnel performing work on Applicant's
                    behalf are working on, within, or in the vicinity of SWBT's
                    poles, ducts, conduits, or rights-of-way located within,
                    under, over, adjacent to, or in the vicinity of streets,
                    highways, alleys or other traveled rights-of-way, such
                    personnel shall follow procedures which Applicant deems
                    appropriate for the protection of persons and property.
                    Applicant and its contractors 

                                    PAGE 26
<PAGE>   311
                    shall be responsible, at all times, for determining and
                    implementing the specific steps required to protect persons
                    and property at the site. Applicant and its contractors 
                    shall provide all traffic control and warning devices
                    required to protect pedestrian and vehicular traffic,
                    workers, and property from danger. Applicant and its
                    contractors shall have sole responsibility for the safety
                    of all personnel performing work on Applicant's behalf, for
                    the safety of bystanders, and for insuring that all
                    operations performed by persons acting on Applicant's
                    behalf conform to current OSHA regulations and all other
                    governmental rules, ordinances or statutes.

                (g) Neither Applicant nor any persons acting on Applicant's
                    behalf shall engage in any conduct which damages public or
                    private property in the vicinity of SWBT's poles, ducts,
                    conduits, or rights-of-way, interferes with the use or
                    enjoyment of such public or private property except as
                    expressly permitted by the owner of such property, or
                    creates a hazard or nuisance on such property (including but
                    not limited to a hazard or nuisance resulting from any
                    abandonment of Applicant's facilities, failure to remove
                    such facilities or any construction debris from the
                    property, failure to erect warning signs or barricades as
                    may be necessary to exclude others from the premises or give
                    notice to others of unsafe conditions on the premises while
                    work performed on Applicant's behalf is in progress, or
                    failure to restore the property to a safe condition after
                    such work has been completed).

                (h) Applicant shall promptly suspend activities on, within, or
                    in the vicinity of SWBT's poles, ducts, conduits, or
                    rights-of-way (other than sites owned or controlled by
                    Applicant) if notified by SWBT that such activities create
                    an unreasonable risk of injury to persons or property
                    (including unreasonable risks of service interruptions).
                    Applicant shall not resume such activities on or in the
                    vicinity of SWBT's poles or rights-of-way until Applicant is
                    satisfied that the work may safely proceed and that any
                    hazardous conditions at the site have been rectified and
                    shall not resume such activities within or in the vicinity
                    of SWBT's conduit system until both Applicant and SWBT are
                    satisfied that the work may safely proceed and that
                    hazardous conditions at the site have been rectified. In the
                    event that SWBT requires Applicant to suspend work
                    activities and it is later determined that there was no
                    reasonable basis for the work suspension, SWBT shall
                    reimburse Applicant for actual costs resulting from the
                    delay.

                (i) All personnel acting on Applicant's behalf shall, while
                    working on or in SWBT's poles, ducts, conduits, or
                    rights-of-way, carry with them suitable identification and
                    shall, upon the request of any SWBT employee or
                    representative, produce such identification.

                                    PAGE 27

<PAGE>   312

                (j) Applicant and persons acting on Applicant's behalf are
                    encouraged to report unsafe conditions on, within, or in the
                    vicinity of SWBT's poles or conduit system to SWBT.

                (k) Applicant shall establish sufficient controls and safeguards
                    to assure compliance with all provisions of this section.

         6.10 Specific Requirements Relating to Personnel, Equipment, Materials,
and Construction Practices Within or in the Vicinity of SWBT's Conduit Systems.
When Applicant, its contractors, and other persons acting on Applicant's behalf
perform work for Applicant within or in the vicinity of SWBT's ducts, conduits,
and rights-of-way where such ducts or conduits are located, they will be guided
by the following:

                (a) Except as may be mutually agreed upon by the parties in
                    writing, Applicant shall not "rod" or clear any duct or
                    inner duct in SWBT's conduit system other than a duct or
                    inner duct assigned to Applicant. Following the assignment
                    of a specific duct or inner duct to Applicant, Applicant may
                    request that SWBT rod or clear the duct or inner duct. If
                    the duct or inner duct cannot be cleared, SWBT will assign
                    the next available duct or inner duct to Applicant.
                    Applicant's request for assignment of the next available
                    duct shall be in writing, may be transmitted to SWBT via fax
                    or other transmission media mutually agreed upon by the
                    parties, and shall be processed within the same intervals
                    applicable to the processing of similar requests by SWBT's
                    own personnel.

                (b) Personnel performing work within SWBT's conduit system on
                    either party's behalf shall not climb on, step on, or
                    otherwise disturb the cables, air pipes, equipment, or other
                    facilities located in any manhole or other part of SWBT's
                    conduit system.

                (c) Personnel performing work within or in the vicinity of
                    SWBT's conduit system (including any manhole) on either
                    party's behalf shall, upon completing their work, make
                    reasonable efforts to remove all tools, unused materials,
                    wire clippings, cable sheathing and other materials brought
                    by them to the work site.

                (d) All of Applicant's facilities shall be firmly secured and
                    supported in accordance with Bellcore and industry standards
                    and any applicable construction standards adopted by SWBT
                    and applicable to SWBT's own facilities.

                                    PAGE 28


<PAGE>   313

                (e) Applicant's facilities shall be plainly identified with
                    Applicant's name in each manhole with a firmly affixed
                    permanent tag that meets the identification standards set by
                    SWBT for its own facilities.

                (f) Manhole pumping and purging required in order to allow
                    Applicant's work operations to proceed shall be performed by
                    Applicant or its contractor in accordance with the
                    requirements of Sections 6.14 and 6.15 of this Agreement.

                (g) Planks or other types of platforms shall be supported only
                    by cable racks.

                (h) Any leak detection liquid or device used by Applicant or
                    personnel performing work on Applicant's behalf within or in
                    the vicinity of SWBT's conduit system shall be of a type
                    approved by SWBT and included on SWBT's then-current list of
                    approved types of leak-detection liquids and devices;
                    provided, however, that Applicant may use any type of leak
                    detection liquid or device which meets Bellcore's published
                    standards if SWBT has not provided Applicant SWBT's list of
                    approved types of leak detection liquids or devices at least
                    60 days in advance of Applicant's work.

                (i) Applicant and its contractors shall be responsible for
                    providing proper ventilation while work is being performed
                    in SWBT's conduit system on Applicant's behalf. Except for
                    protective screens, no temporary cover shall be placed over
                    an open manhole unless it is at least four feet above the
                    surface level of the manhole opening.

                (j) Smoking or the use of any open flame is prohibited in
                    manholes, in any other portion of the conduit system, or
                    within 10 feet of any open manhole entrance.

                (k) Artificial lighting, when required by Applicant, will be
                    provided by Applicant. Only explosion-proof lighting
                    fixtures shall be used.

                (l) Neither Applicant nor personnel performing work on
                    Applicant's behalf shall allow any combustible gas, vapor,
                    liquid, or material to accumulate in SWBT's conduit system
                    (including any manhole) during work operations performed
                    within or in the vicinity of SWBT's conduit system.

               (m)  Applicant shall comply with the standards set by SWBT for 
                    its own personnel restricting the use of spark producing
                    tools, equipment, and devices (including but not limited to
                    such tools as electric drills and hammers, meggers,
                    breakdown sets, induction sets, and the like) in 

                                    PAGE 29
<PAGE>   314

                    manholes and other portions of SWBT's conduit system,
                    provided that such standards have been communicated in
                    writing to Applicant at least 60 days in advance of the
                    construction, installation, or placement of Applicant's
                    facilities within SWBT's conduit system.

                (n) Cable lubricants used in conduit systems shall be of a type
                    or types approved by SWBT and included on SWBT's
                    then-current list of approved types of cable lubricants;
                    provided, however, that Applicant may use any type of cable
                    lubricant which meets Bellcore's published standards if SWBT
                    has not provided Applicant SWBT's list of approved types of
                    cable lubricants at least 60 days in advance of Applicant's
                    work.

         6.11 Opening of Manholes and Access to Conduit. The following
requirements apply to the opening of SWBT's manholes and access to SWBT's
conduit system.

                (a) Applicant will notify SWBT not less than 48 hours in advance
                    before entering SWBT's conduit system to perform
                    non-emergency work operations. Such operations shall be
                    conducted during normal business hours except as otherwise
                    agreed by the parties. The notice shall state the general
                    nature of the work to be performed. As a courtesy, Applicant
                    shall, when feasible, provide SWBT with 10 working days
                    advance notice before entering SWBT's conduit system. SWBT
                    shall, within 10 working days after the effective date of
                    this Agreement, advise Applicant of the manner in which
                    notices required by this section shall be given.

                (b) An authorized employee or representative of SWBT may be
                    present as a construction inspector at any time when
                    Applicant or personnel acting on Applicant's behalf enter or
                    perform work within SWBT's conduit system. Such inspectors
                    may inspect the performance and quality of the work and
                    monitor the work for compliance with the terms, conditions,
                    and specifications of this Agreement or, in the case of
                    facilities modification, capacity expansion or make-ready
                    work, the plans and specifications of the facilities
                    modification, capacity expansion, or make-ready project.
                    When SWBT inspectors are present, Applicant and its
                    contractors shall have sole authority, responsibility, and
                    control over the method or manner by which the work is to be
                    performed. SWBT's inspectors may call violations to
                    Applicant's attention but shall have no authority to direct
                    or advise Applicant or personnel acting on Applicant's
                    behalf concerning the method or manner by which the work is
                    to be performed; provided, however, that nothing contained
                    in this subsection shall relieve Applicant from complying
                    with any requirements of this Agreement.


                                    PAGE 30
<PAGE>   315

                (c) The parties contemplate that Applicant may need to perform
                    operations in SWBT's conduit system other than during normal
                    business hours and may on occasion require access to
                    manholes on shorter notice than contemplated in subsection
                    (a) above. Under these circumstances, Applicant shall notify
                    SWBT as soon as is reasonably possible of its intent to
                    enter and perform work in the conduit system and SWBT shall
                    not, without due cause and justification, insist on literal
                    compliance with scheduling requirements of subsection (a).
                    SWBT will establish procedures enabling SWBT to receive
                    notices from Applicant under this subsection 24 hours a day,
                    seven days a week.

                (d) Each party must obtain any necessary authorization from
                    appropriate authorities to open manholes for such party's
                    own conduit work and operations therein.

                (e) Applicant shall reimburse SWBT for costs associated with the
                    presence of construction inspectors only as specified in
                    APPENDIX I and only as permitted by applicable laws, rules,
                    regulations, and commission orders. SWBT shall not charge
                    Applicant for more than one such construction inspector per
                    site at any given time.

                (f) If the presence of SWBT personnel at the site is requested
                    by Applicant or, in Applicant's opinion, is integral to
                    successful completion of the work, Applicant shall pay the
                    costs of having such personnel present.

         6.12   OSHA Compliance. The parties agree that:

                (a) facilities attached to SWBT's poles or placed in SWBT's
                    ducts, conduits, and rights-of-way shall be constructed,
                    placed, maintained, repaired, and removed in accordance with
                    the Occupational Safety and Health Act (OSHA) and all rules
                    and regulations promulgated thereunder;

                (b) all persons acting on such party's behalf shall, when
                    working on, within, or in the vicinity of SWBT's poles,
                    ducts, conduits, or rights-of-way, comply with OSHA and all
                    rules and regulations thereunder; and

                (c) Applicant shall establish appropriate procedures and
                    controls to assure compliance with all requirements of this
                    section.

         6.13 Hazardous Substances. Applicant acknowledges that, from time to
time, hazardous substances (as defined in Section 3.19 of this Agreement) may
enter SWBT's conduit system and accumulate in manholes or other conduit
facilities and that hazardous substances may be present at other sites where
SWBT's poles, ducts, conduits, or rights-of-way are located.

                                    PAGE 31

<PAGE>   316

                (a) Applicant may, at its expense, perform such inspections and
                    tests at the site of any pole, duct, conduit, or
                    right-of-way occupied by or assigned to Applicant as
                    Applicant may deem necessary to determine the presence at
                    such sites of hazardous substances. SWBT will assist
                    Applicant, at Applicant's request and expense, in the
                    performance of such inspections and tests.

                (b) SWBT makes no representations to Applicant or personnel
                    performing work on Applicant's behalf that SWBT's poles,
                    ducts, conduits, or rights-of-way will be free from
                    hazardous substances at any particular time. Before entering
                    a manhole or performing any work within or in the vicinity
                    of SWBT's conduit system or any other site subject to access
                    under this Agreement, Applicant or personnel acting on
                    Applicant's behalf shall independently determine, to their
                    satisfaction, whether such hazardous substances are present
                    and conduct their work operations accordingly.

                (c) Each party shall promptly notify the other of hazardous
                    substances known by such party to be present within or in
                    the vicinity of poles, ducts, conduits, or rights-of-way
                    occupied by or assigned to Applicant pursuant to this
                    Agreement if, in the sole judgment of such party, such
                    hazardous substances create a serious danger to (1) the
                    health or safety of personnel working within or in the
                    vicinity of the conduit or (2) the physical condition of the
                    other party's facilities placed or to be placed within the
                    conduit.

                (d) Nothing contained in this Agreement (including but not
                    limited to the acknowledgments and representations set forth
                    in this section) shall relieve either party from its
                    responsibility to comply with all applicable environmental
                    laws or its responsibility for any liability arising out of
                    such party's failure to comply with such laws. Nothing
                    contained in this Agreement shall be construed as relieving
                    SWBT of liability for hazardous substances present at any
                    site subject to this Agreement or as relieving either party
                    of liability for introducing hazardous substances to the
                    site or causing or contributing to the release of any such
                    substances. Failure to comply with the requirements of this
                    section may, however, be considered in determining issues
                    relating to negligence, causation of injury, and comparative
                    responsibility for injuries to persons, property, and the
                    environment.

         6.14 Compliance with Environmental Laws and Regulations. Applicant and
SWBT agree to comply with the following provisions relating to compliance with
environmental laws and regulations.

                                    PAGE 32


<PAGE>   317

                (a) Facilities attached to SWBT's poles or placed in SWBT's
                    ducts, conduits, and rights-of-way following the effective
                    date of this Agreement shall be constructed, placed,
                    maintained, repaired, and removed in accordance with all
                    applicable federal, state, and local environmental statutes,
                    ordinances, rules, regulations, and other laws.

                (b) All persons acting on Applicant's or SWBT's behalf,
                    including but not limited to the parties' employees,
                    agents, contractors, and subcontractors, shall, when
                    working on, within or in the vicinity of SWBT's poles,
                    ducts, conduits, or rights-of-way, comply with all
                    applicable federal, state, and local environmental laws,
                    including but not limited to all environmental statutes,
                    ordinances, rules, and regulations. Applicant and personnel
                    acting on Applicant's behalf are expected to be familiar
                    with their obligations under environmental laws such as the
                    Comprehensive Environmental Response, Compensation, and
                    Liability Act (42 U.S.C. Sections 9601 et seq.), the Toxic
                    Substance Control Act (15 U.S.C. Sections 2601-2629), the
                    Clean Water Act (33 U.S.C. Sections 1251 et seq.), and the
                    Safe Drinking Water Act (42 U.S.C. Sections 300f-300j).

                (c) The parties shall each establish appropriate procedures and
                    controls to assure compliance with all requirements of this
                    section.

                (d) From and after the effective date of this Agreement, neither
                    party nor personnel acting on either party's behalf shall
                    discharge or release hazardous substances onto or from the
                    site of any SWBT pole, duct, conduit, or right-of-way.
                    Neither Applicant nor SWBT nor personnel acting on either
                    party's behalf shall discharge water or any other substance
                    from any SWBT manhole or other conduit facility onto public
                    or private property, including but not limited to any storm
                    water drainage system, without first determining that such
                    discharge would not violate any environmental law, create
                    any environmental risk or hazard, or damage the property of
                    any person. Applicant will be expected to test such water or
                    substance for hazardous substances in accordance with
                    then-applicable SWBT standards and practices.

                (e) Applicant and SWBT and all personnel performing work on
                    Applicant's or SWBT's behalf shall, when working on, within,
                    or in the vicinity of SWBT's poles, ducts, conduits, and
                    rights-of-way, comply with such additional standards,
                    practices, and requirements as SWBT may from time to time
                    adopt to comply with environmental laws, provided that such
                    standards are communicated in writing to Applicant at least
                    60 days in advance of Applicant's work.

         6.15 Compliance with Other Governmental Requirements (Including
Aeronautical Navigation Safeguards). Facilities attached to SWBT's poles or
placed in 


                                    PAGE 33
<PAGE>   318

SWBT's ducts, conduits, and rights-of-way shall be constructed, placed,
maintained, repaired, and removed in accordance with the ordinances, rules, and
regulations of any governing body having jurisdiction of the subject matter
(including but not limited to any valid ordinances, rules, and regulations
requiring permits, certificates, licenses or the like). Applicant and SWBT shall
comply with all statutes, ordinances, rules, regulations, and other laws
requiring the marking and lighting of aerial wires, cables, and other structures
to ensure that such wires, cables, and structures are not a hazard to
aeronautical navigation.

         6.16 Differences in Specifications. To the extent that there may be
differences in the specifications, the most stringent specification will apply
except as otherwise specifically provided by SWBT in writing. Applicant will
consult with SWBT when Applicant is uncertain as to which specification is to be
followed.

         6.17 Responsibility for the Condition of Facilities. Each party will be
responsible at all times for the condition of its facilities (including but not
limited to those extending from SWBT's poles, ducts, conduits, or rights-of-way
directly to any other location) and for its compliance with the requirements and
specifications of this article and all applicable laws, rules, regulations, and
ordinances.

            ARTICLE 7: PRIMARY POINTS OF CONTACT, ACCESS TO RECORDS,
                          AND PRE-OCCUPANCY INSPECTIONS

         7.01 Designation of Primary Points of Contact. Each party will, at the
request of the other party, designate a primary point of contact to facilitate
communications between the parties and the timely processing of Applicant's
applications for access to SWBT's poles, ducts, conduits, and rights-of-way
located within this State. Designations of primary points of contact will be
made by written notices including the name, title, address, phone number, and
fax number of the person designated as the primary point of contact; provided,
however, that unless and until a different designation is made, SWBT's primary
point of contact shall be the Utility Liaison Supervisor identified in APPENDIX
VIII. Designation of primary points of contact pursuant to this section will not
affect notice requirements or other legal requirements set forth in other
provisions of this Agreement.

         7.02 Determinations by Applicant of Suitability and Availability.
Applicant shall make its own, independent assessment of the suitability of
SWBT's poles, ducts, conduits, and rights-of-way for Applicant's intended
purposes.

         7.03 Access to Records Relating to SWBT's Poles, Ducts, Conduits, and
Rights-of-Way. This section establishes procedures through which certain records
and information relating to SWBT's poles, ducts, conduits, and rights-of-way
will be made available to Applicant for planning and other purposes. Access to
such records and information will be conditioned on Applicant's execution of a
nondisclosure agreement equivalent in substance to the Nondisclosure Agreement
attached to this Agreement as 

                                    PAGE 34
<PAGE>   319

APPENDIX V or such other nondisclosure agreement as shall be mutually acceptable
to the parties, and no person acting on Applicant's behalf will be granted
access to such records and information without first signing such a
nondisclosure agreement. Applicant will reimburse SWBT for all reasonable costs
incurred by SWBT in granting Applicant's requests for access to records and
information under this section.

                (a) Applicant may, at any time after the effective date of this
                    Agreement, request permission to inspect SWBT's pole and
                    conduit maps and records, cable plat maps, and other plant
                    location records, if any, recording or logging assignments
                    of pole, duct, and conduit space. Applicant will be
                    permitted to examine these records during regular business
                    hours at a location where copies of such records are
                    maintained or at such other location as may be mutually
                    agreed upon by the parties. Access to such maps and records
                    will be by appointment only, and SWBT will make such maps
                    and records available for inspection by Applicant on two
                    business days advance notice; provided, however, that
                    Applicant will, as a courtesy, when feasible, provide SWBT
                    with 10 business days advance notice of its intent to
                    examine such records.

                (b) The access described in subsection (a) shall include the
                    right to make copies, at Applicant's expense, except for
                    cable plat maps, which shall be made available for
                    inspection only. In all instances, such access shall include
                    the ability to take notes and make drawings with references
                    to those maps and records. No references to cable counts or
                    circuit information may be included in any such copies,
                    notes, or drawings. With respect to other cable-specific or
                    customer-specific information, Applicant's copies, notes, or
                    drawings may include only such information as needed for
                    bona fide engineering and construction purposes (e.g.,
                    proposing cable consolidations and identifying plant
                    discrepancies) and not for sales, marketing, competitive
                    intelligence, competitive analysis, strategic planning, and
                    similar activities. Applicant's copies, notes, and drawings
                    may include estimates regarding the physical characteristics
                    (such as size and weight) of cables when necessary to make
                    engineering determinations regarding the capacity, safety,
                    reliability, or suitability of SWBT's poles, ducts,
                    conduits, and rights-of-way for Applicant's intended uses.

                (c) SWBT will provide Applicant the best information available
                    from SWBT's current pole and conduit maps and records, cable
                    plat maps, and other outside plant and construction records.
                    SWBT represents that such records reflect approximate
                    geographical locations of the facilities depicted and may
                    not accurately reflect information such as:

                    (1)  the exact location of the facilities depicted;

                                    PAGE 35


<PAGE>   320

                    (2)  the physical size, characteristics, or condition of the
                         facilities depicted;

                    (3)  the ducts or inner ducts presently occupied, assigned,
                         or available within any particular conduit segment or
                         manhole;

                    (4)  the arrangement of facilities attached to a pole, the
                         position of facilities suspended between poles or their
                         relationship to each other and to the ground, or the
                         positioning of cables and other facilities housed
                         within ducts, conduits, manholes or other portions of
                         SWBT's conduit system; and

                    (5)  other information which must be assessed before it can
                         be determined that space is available on or in a pole,
                         duct, or conduit for the attachment or occupancy of
                         Applicant's facilities or that the poles, ducts, or
                         conduits depicted are suitable for Applicant's intended
                         use.

         7.04 Pre-occupancy Inspection of Poles, Ducts, Conduits, and
Rights-of-Way. Applicant shall be permitted to view and inspect specified poles,
ducts, conduits, and rights-of-way on a pre-occupancy basis as provided in this
section.

                (a) After the effective date of this Agreement, Applicant may
                    view specified poles, ducts, conduits, and rights-of-way on
                    a pre-occupancy basis. Nothing contained in this section
                    shall preclude Applicant from visually inspecting SWBT's
                    poles, ducts, conduits, or rights-of-way from any vantage
                    point lawfully accessible to Applicant without SWBT's
                    permission.

                (b) Applicant shall not enter any SWBT manhole for the purpose
                    of performing a pre-occupancy inspection without complying
                    with all applicable requirements set forth in Article 6 of
                    this Agreement, including but not limited to the provisions
                    of Section 6.11 relating to the opening of manholes.

              ARTICLE 8: POLE, DUCT, AND CONDUIT SPACE ASSIGNMENTS

         8.01 Selection of Space. Applicant will select the space Applicant will
occupy on SWBT's poles or in SWBT's conduit systems. Applicant's selections will
be based on the same criteria SWBT applies to itself. To enable Applicant to
make such selections in accordance with SWBT's criteria, SWBT will provide
Applicant information about the network guidelines and engineering protocols
used by SWBT in determining the placement of facilities on SWBT's poles and in
SWBT's conduit systems. In conduit systems owned or controlled by SWBT,
maintenance ducts (as defined in Section 3.25) shall not be considered available
for Applicant's use except as specifically provided 

                                    PAGE 36
<PAGE>   321

elsewhere in this Agreement. All other ducts, inner ducts, sub-ducts, and
partitioned conduits which are not assigned or occupied shall be deemed
available for use by SWBT, Applicant, and third parties entitled to access under
the Pole Attachment Act.

         8.02 Pole, Duct, and Conduit Space Assignments. Pole, duct, and conduit
space selected by Applicant will be assigned to Applicant as provided in this
section. Information received by SWBT in connection with this section shall be
subject to the provisions of Article 28 of this Agreement (Confidentiality of
Information).

                (a) After Applicant's application for a pole attachment or
                    conduit occupancy license has been received by SWBT, the
                    pole, duct, and conduit space selected by Applicant in such
                    application will be assigned to Applicant for a
                    pre-occupancy period not to exceed 12 months. The assignment
                    (and date and time of assignment) will be logged and
                    recorded in the appropriate SWBT records. If such space has
                    been provisionally assigned to Applicant as authorized below
                    in subsection (b), the 12-month pre-occupancy assignment
                    period will begin on the date the provisional assignment is
                    recorded in SWBT's records or the date of SWBT's receipt of
                    Applicant's notice of intent to occupy under subsection (b),
                    whichever date first occurs.

                (b) SWBT shall, within 60 days after the effective date of this
                    Agreement, adopt interim procedures which will enable pole,
                    duct, and conduit space to be provisionally assigned to
                    Applicant and other applicants prior to the submission of
                    formal applications required pursuant to Section 9.02 of
                    this Agreement. Where indicated below, the interim
                    procedures will apply to the assignment of space to SWBT as
                    well as to Applicant and other applicants. SWBT may, on 60
                    days advance notice to Applicant, revise such interim
                    procedures if such procedures prove to be unworkable, in
                    which event Applicant may challenge SWBT's decision in
                    accordance with procedures available to Applicant under
                    applicable federal and state laws and regulations. The
                    procedures will enable Applicant and other applicants, by
                    written notice, to advise SWBT of their intent to occupy
                    unassigned space which appears, from SWBT's records, to be
                    available for assignment. Upon receipt of such notice, SWBT
                    shall date-and-time stamp the notice and provisionally
                    assign the space selected by Applicant or such other
                    applicant by logging and recording the assignment (and date
                    and time of assignment) in the appropriate SWBT records,
                    which records will be available for inspection as provided
                    in Section 7.03 of this Agreement. Space provisionally
                    assigned to Applicant or such other applicant will not be
                    available for assignment to any other person or entity,
                    including SWBT. Notwithstanding such provisional assignment,
                    Applicant shall not occupy such space without first
                    obtaining a license, except as provided in Section 8.03. 
                    The following additional requirements shall apply.

                                    PAGE 37
<PAGE>   322


                    (1)  Before giving SWBT notice of its intent to occupy
                         unassigned space, Applicant shall make a good faith
                         determination that it actually plans to occupy such
                         space. The assignment process shall not be used by
                         either party for the purpose of holding or reserving
                         space which such party does not plan to use or for the
                         purpose of precluding SWBT or any other person or
                         entity from utilizing or having access to SWBT's poles,
                         ducts, conduits, or rights-of-way.

                    (2)  With respect to unassigned conduit occupancy space, the
                         notice must include all information required to enable
                         SWBT and joint users, including other persons or
                         entities which may from time to time seek space in the
                         same ducts and conduits, to determine the specific
                         space which Applicant desires to occupy. The notice
                         must, therefore, include, at a minimum, the following
                         information:

                         (i)   the specific conduit sections, and each manhole, 
                               to be occupied;

                         (ii)  the number of ducts, and number of inner ducts,
                               to be occupied by Applicant within each conduit
                               section;

                         (iii) the physical size (diameter) of the cables to be
                               placed in such duct, if known, or the maximum and
                               minimum sizes of the cables which may be placed
                               if more than one size cable is being considered
                               for the space to be occupied;

                         (iv)  the anticipated use by Applicant of any
                               infrequent construction techniques and
                               connectivity solutions authorized under Section
                               6.03 to avoid high or unusual expenditures;

                         (v)   Applicant's best estimates of the dates when
                               Applicant plans to begin and complete
                               construction at the sites specified in the
                               notice;

                         (vi)  if applicable, a conspicuous statement that
                               Applicant intends to occupy the space before the
                               issuance of a license, as provided in Section
                               8.03 of this Agreement; and

                         (vii) if applicable, a conspicuous statement, as
                               required by Section 5.06 of this Agreement, that
                               the notice pertains to a building entrance or
                               building distribution duct or conduit or other
                               space within a building.

                                    PAGE 38


<PAGE>   323

                    (3)  With respect to unassigned pole space, such notice must
                         include all information required to enable SWBT and
                         other joint users, including other persons or entities
                         seeking space on the same poles, to determine the
                         specific space which Applicant desires to occupy. The
                         notice must, therefore, include, at a minimum, the
                         following information:

                         (i)   the specific poles to be occupied;

                         (ii)  the specific space on each pole to be occupied,
                               including the height (distance from the ground)
                               of the attachment and the side (road or field)
                               where the attachment is to be made;

                         (iii) the anticipated number and types of cables to be
                               attached, together with the anticipated physical
                               size (diameter) and weight (weight per foot) of
                               such cables, and the anticipated number and types
                               of strands, if any, to be used to support the
                               cables, such information to be sufficient to give
                               notice to SWBT and other joint users of the
                               remaining space on the pole available and what
                               facilities modification, capacity expansion, or
                               make-ready work may be required of subsequent
                               applicants as a result of the provisional
                               assignment of space to Applicant;

                         (iv)  the anticipated use by Applicant of any
                               infrequent construction techniques and
                               connectivity solutions authorized under Section
                               6.03 to avoid high or unusual expenditures;

                         (v)   Applicant's best estimates of the dates when
                               Applicant plans to begin and complete
                               construction at the sites specified in the
                               notice; and

                         (vi)  if applicable, a conspicuous statement that
                               Applicant intends to occupy the space before the
                               issuance of a license, as provided in Section
                               8.03 of this Agreement.

                    (4)  No later than 30 days after giving such notice, 
                         Applicant shall file an application under Section 9.02 
                         or the provisional assignment will lapse.

                    (5)  As stated in Section 7.03(c), SWBT does not represent
                         that its records accurately reflect the information
                         necessary to enable Applicant to rely upon a
                         records-based assignment process. SWBT shall have no
                         duty to verify that space provisionally assigned
                         pursuant to this subsection is actually available.

                                    PAGE 39

<PAGE>   324

                (c) Assignments made prior to the issuance of a license will be
                    provisional assignments and will be subject to modification
                    if it is subsequently determined that the space selected by
                    or assigned to Applicant is already occupied or that a
                    different assignment is required to comply with SWBT's
                    standards for assigning pole, duct, and conduit occupancy
                    space.

                (d) Applicant's obligation to pay semiannual pole attachment or
                    conduit occupancy fees will commence from the date of
                    assignment or provisional assignment, as logged and recorded
                    in the appropriate SWBT records.

                (e) During the 12-month assignment period following the date
                    space is assigned to Applicant and entered into the
                    appropriate SWBT record, SWBT shall not occupy or use such
                    space without Applicant's permission, shall not assign such
                    space to any party other than Applicant, and shall not
                    knowingly permit any party other than Applicant to occupy or
                    use such space without Applicant's permission except as
                    otherwise specifically provided in this Agreement. The
                    assignment to Applicant will automatically lapse 12 months
                    after the date the assignment has been entered into the
                    appropriate SWBT record if Applicant has not occupied such
                    assigned space within such 12-month period; provided,
                    however, that if Applicant's failure to occupy the space
                    within such 12-month period results from SWBT's failure to
                    perform make-ready work on schedule, the parties shall
                    negotiate a single extension of the assignment period, which
                    extension shall not extend the assignment period beyond
                    three months from the date of completion of SWBT's
                    make-ready work; and, provided further, that if Applicant
                    can demonstrate that its failure to occupy the space within
                    such 12-month period results from the actions of SWBT or
                    third parties other than persons acting on Applicant's
                    behalf, or from acts of God, the assignment may be extended
                    for a period no longer than three months from the date
                    Applicant is first able to commence construction activities
                    at the site involved. Assignments to third parties shall be
                    subject to the same rules applicable to Applicant under this
                    subsection. Extensions permitted under this subsection must
                    be requested in writing before expiration of the original
                    12-month period and shall be recorded on the appropriate
                    SWBT records available for inspection under Section 7.03.

                (f) SWBT may assign space to itself by making appropriate
                    entries in the same records used to log assignments to
                    Applicant and third parties. If SWBT assigns pole, duct, or
                    conduit space to itself, such assignment will automatically
                    lapse 12 months after the date the assignment has been
                    entered into the appropriate SWBT record if SWBT has not
                    occupied such assigned space within such 12-month period;
                    provided, 

                                    PAGE 40
<PAGE>   325

                    however, that if SWBT's failure to occupy the space within
                    such 12-month period results from the actions of Applicant
                    or third parties other than persons acting on SWBT's behalf,
                    or from acts of God, SWBT's assignment may be extended for a
                    period no longer than three months from the date SWBT is
                    able to commence construction at the site involved.
                    Extensions permitted under this subsection must be recorded
                    before expiration of the original 12-month period on the
                    appropriate SWBT records available for inspection under
                    Section 7.03.

                (g) If facilities modifications, capacity expansions, or other
                    make-ready work are required due to the assignment of space
                    to either party under this section, the party to whom such
                    space has been assigned will reimburse the person or entity
                    incurring the costs for such facilities modifications,
                    capacity expansions, or make-ready work if the party to whom
                    such space has been assigned fails to occupy the assigned
                    space within the 12-month assignment period or any extension
                    thereof.

                (h) Except as provided in subsections (e)-(f) above, assignments
                    shall not be extended, renewed, or sequentially repeated in
                    any manner (other than by actual occupancy) that enables
                    Applicant, SWBT, or any joint user to preclude access by
                    others to unused pole attachment or conduit occupancy space
                    for any period greater than 12 months after the date of
                    initial assignment.

                (i) At Applicant's election, Applicant may file an application
                    for access which specifically requests that the space sought
                    by Applicant not be assigned to Applicant immediately and
                    not be recorded immediately in the SWBT records available
                    for inspection by other telecommunications carriers, cable
                    television systems, or other providers of telecommunications
                    services under Section 7.03 of this Agreement. In that
                    event, the space sought by Applicant will not be assigned to
                    Applicant and will remain available for assignment to others
                    without restriction until such time as such space is
                    formally assigned to Applicant in accordance with
                    Applicant's written instructions and the assignment is
                    recorded in the records available for inspection under
                    Section 7.03. The assignment shall be made no later than the
                    date of issuance to Applicant of a license confirming that
                    Applicant has the right to occupy the space described in the
                    license. In the event that Applicant elects to proceed under
                    this subsection, Applicant's obligation to pay pole
                    attachment and conduit occupancy fees shall not commence
                    until the date the assignment is recorded in the appropriate
                    SWBT records and Applicant shall bear the risks that (1) the
                    space sought by Applicant will be assigned to and occupied
                    by another person or entity or (2) circumstances will occur
                    which may require that SWBT reevaluate 

                                    PAGE 41
<PAGE>   326

                    Applicant's application and repeat the field inspection
                    portion of the pre-license survey at Applicant's expense.

                (j) Notices and applications including assignment requests will
                    be date- and time-stamped on receipt. Because space will be
                    selected and further assignments made based on entries
                    logged and recorded in the appropriate SWBT records, the
                    date and time of assignment will be the date and time when
                    the assignment is recorded rather than the date and time of
                    receipt of the application or notice requesting such
                    assignment. Although SWBT's clerical personnel will promptly
                    process assignment requests included in applications and
                    notices transmitted to SWBT by mail, courier, fax, or other
                    transmission media, SWBT shall not be liable for any failure
                    by Applicant to obtain the space desired by Applicant due to
                    delay in logging assignment requests. Applicant acknowledges
                    that, to maximize the probability that Applicant will be
                    assigned the space Applicant desires, Applicant should, when
                    possible, submit applications and notices including
                    assignment requests in person to SWBT at the site where the
                    applicable records are maintained and should countersign the
                    entry reflecting the assignment and time of assignment.

                        8.03        Immediate Occupancy.  SWBT shall, within 60 
days after the effective date of this Agreement, adopt interim procedures which
will provide Applicant the ability to attach or place facilities on or in SWBT's
poles, ducts, conduits, and rights-of-way on an immediate basis when such space
is available for Applicant's use and no make-ready work or infrequent
construction techniques or connectivity solutions are required. SWBT may, on 60
days advance notice to Applicant, revise or terminate such interim procedures if
they prove to be unworkable, in which event Applicant may seek renegotiation of
this Agreement or challenge SWBT's decision in accordance with procedures
available to Applicant under applicable federal and state laws, regulations, and
commission orders. The special procedures established under this section shall
supplement, rather than replace, the regular assignment and licensing procedures
set forth in Articles 8-10 of this Agreement, are intended to be used only under
special circumstances (e.g., when the regular procedures allow insufficient time
to meet customer service commitments or resolve non-routine construction or
network contingencies), shall not be used on a routine basis, and shall be
consistent with subsections (a)-(f) below.

                (a) Upon giving SWBT the notice required by this subsection,
                    Applicant may immediately occupy space assigned or
                    provisionally assigned to Applicant pursuant to Section 8.02
                    of this Agreement. The notice shall be contained in either a
                    notice of intent to occupy as provided in Section 8.02(b) or
                    a license application under Section 9.02. Applicant shall
                    not give such notice or occupy such space without first
                    reviewing SWBT's records and determining that the records
                    reflect that the space sought is available.

                                    PAGE 42


<PAGE>   327

                (b) Applicant shall not occupy space which has not been assigned
                    or provisionally assigned to Applicant. The assignment must
                    be recorded on the appropriate SWBT records, as provided in
                    Section 8.02, prior to Applicant's occupancy. If Applicant
                    subsequently determines that the records are inaccurate and
                    that the space assigned to Applicant is not available, or
                    that the space assigned is not suitable for Applicant's
                    intended use, Applicant shall, within one business day,
                    notify SWBT in writing that it no longer intends to occupy
                    the space earlier assigned and is releasing the assignment.
                    Except as otherwise provided in this subsection, Applicant
                    shall not occupy other space on the pole or in the duct or
                    conduit without first obtaining an assignment or provisional
                    assignment of the space which Applicant will occupy. To
                    avoid high or unusual expenditures resulting from
                    unanticipated conditions at the site, Applicant may occupy
                    space not assigned to Applicant subject to the following
                    terms and conditions.

                    (1)  Applicant may occupy the next available space shown on
                         SWBT's records as available at the time of Applicant's
                         last review of the records. Applicant shall not
                         knowingly occupy space occupied by or assigned to SWBT
                         or any third party without consent of the party to whom
                         the space has been assigned.

                    (2)  Within one business day after occupying such space,
                         Applicant shall submit to SWBT a written notice of
                         intent to occupy or an application for the space
                         occupied showing the reason for Applicant's use of the
                         space occupied.

                    (3)  Applicant shall bear the risk that space occupied by
                         Applicant pursuant to this section was assigned to SWBT
                         or a third party during the period between Applicant's
                         last review of the records and Applicant's occupancy of
                         such space. After occupying space not previously
                         assigned to Applicant, Applicant shall review the
                         records and promptly notify the affected party if
                         Applicant determines that it has occupied space
                         assigned to such party. At the request of the party to
                         whom such space has been assigned, Applicant shall,
                         within 24 hours, or within such other period of time
                         mutually agreed to by the parties affected, remove its
                         facilities from the space in question if the parties
                         affected cannot reach an acceptable alternative
                         solution. SWBT and Applicant anticipate that all
                         parties affected will act in good faith to work out
                         acceptable solutions and that the parties affected will
                         not insist on strict adherence to the 24-hour removal
                         requirement unless there is a legitimate business need
                         for compelling removal within such time period.

                                    PAGE 43


<PAGE>   328

                    (4)  SWBT shall be entitled to recover from Applicant actual
                         costs, if any, directly incurred by SWBT as a result of
                         Applicant's decision under this subsection to occupy
                         space subject to a valid prior assignment to SWBT.
                         Applicant shall indemnify, on request defend, and save
                         SWBT harmless from any injury, loss, damage, liability,
                         or claim asserted against SWBT by any third party
                         resulting from Applicant's decision under this
                         subsection to occupy space assigned to such third
                         party.

                (c) Nothing in this section authorizes Applicant to place its
                    facilities on or in any pole, duct, or conduit space already
                    occupied by the facilities of SWBT or a third party, even if
                    the presence of such facilities is not reflected on SWBT's
                    records.

                (d) Nothing in this section authorizes Applicant, without first
                    obtaining SWBT's written authorization, to (1) place its
                    facilities on any pole or in any duct or conduit that
                    requires make-ready work (other than third-party make-ready
                    work arranged directly by Applicant) or (2) utilize any
                    infrequent construction technique or connectivity solution
                    described in Section 6.03.

                (e) If Applicant has not done so already, within 24 hours after
                    occupying space pursuant to this section, Applicant will
                    submit to SWBT an application for the space occupied as
                    provided in Section 9.02 of this Agreement. The application
                    may be submitted by fax.

                (f) Applicant will bear all risks resulting from the possibility
                    that assigned space which appears from the records to be
                    available is not available or in suitable condition to be
                    used by Applicant and shall indemnify, on request defend,
                    and hold SWBT harmless from any injury, loss, damage, claim,
                    or liability (including but not limited to third-party
                    claims) resulting from Applicant's occupancy of space in
                    violation of this section.

                 ARTICLE 9: APPLICATIONS AND PRE-LICENSE SURVEYS

         9.01 Licenses Required. Except as otherwise specifically permitted in
this Agreement, Applicant shall apply in writing for and receive a license
before attaching facilities to specified SWBT poles or placing facilities within
specified SWBT ducts, conduits, manholes, or handholes. License applications and
information received by SWBT in connection with such applications shall be
subject to the provisions of Article 28 of this Agreement (Confidentiality of
Information).

         9.02 Application Form. To apply for a pole attachment or conduit
occupancy license under this Agreement, Applicant shall submit to SWBT two
signed copies of the 


                                    PAGE 44
<PAGE>   329

appropriate application forms. SWBT represents that the forms specified in
subsections (a)-(b) are forms in use prior to the effective date of this
Agreement and that SWBT is in the process of revising such forms to conform to
the provisions of this Agreement and to streamline the application process. The
parties therefore agree that the forms specified in subsections (a) and (b) will
be interim forms only. SWBT reserves the right to change the format and content
of these forms upon 60 days written notice to Applicant.

                (a) To apply for a pole attachment license, Applicant shall
                    submit to SWBT two signed copies of SWBT's Form SW-9434
                    ("Access Application and Make-Ready Authorization") together
                    with completed Form SW-9433 ("Pole Attachments"). An
                    application for a pole attachment license will not be
                    complete or subject to processing by SWBT until these forms
                    have been submitted to SWBT; provided, however, that such
                    forms will be deemed to be substantially complete if they
                    contain the information specified in subsections (c)-(h)
                    below, as applicable. Copies of Forms SW-9433 and SW-9434
                    are attached to this Agreement as parts of APPENDIX III.

                (b) To apply for a conduit occupancy license, Applicant shall
                    submit to SWBT two signed copies of SWBT's Form SW-9434
                    ("Access Application and Make-Ready Authorization") together
                    with completed Form SW-9435 ("Conduit Occupancy"). An
                    application for a conduit occupancy license will not be
                    complete or subject to processing by SWBT until these forms
                    have been submitted to SWBT; provided, however, that such
                    forms will be deemed to be substantially complete if they
                    contain the information specified in subsections (c)-(h)
                    below, as applicable. Copies of Forms SW-9434 and SW-9435
                    are attached to this Agreement as parts of APPENDIX III.

                (c) Each application for a license under this Agreement shall
                    include, at a minimum, the following information:

                    (1)  the poles, ducts, and conduits (including all manholes)
                         along Applicant's proposed route to or within which
                         Applicant desires to attach or place its facilities;

                    (2)  a description of the facilities to be attached to
                         SWBT's poles and a description of the facilities to be
                         placed within each component of SWBT's conduit system
                         (including but not limited to ducts, conduits,
                         manholes, and handholes) along the proposed route;

                    (3)  for poles, the proposed points of attachment;

                    (4)  for building entrance or building distribution ducts or
                         conduits or other space within a building, a
                         conspicuous statement, as required 

                                    PAGE 45
<PAGE>   330

                         by Section 5.06 of this Agreement, that the application
                         pertains to a building entrance or building
                         distribution duct or conduit or other space within a
                         building;

                    (5)  if applicable, a conspicuous notation that the space
                         requested is not to be assigned (or billed) to
                         Applicant until SWBT has received Applicant's written
                         instruction to make such assignment or issued a license
                         authorizing Applicant to occupy the space requested;
                         and

                    (6)  if applicable, a conspicuous statement that Applicant
                         intends to occupy the space before the issuance of a
                         license, as provided in Section 8.03 of this Agreement.

                (d) Facilities descriptions which apply to multiple pole
                    attachments or conduit occupancies need only be described
                    once on any form. Facilities descriptions shall include, at
                    a minimum, the following information:

                    (1)  the number and types of cables, including the physical
                         size (diameter) and weight (weight per foot);

                    (2)  the number and types of strands, if any, which will be
                         used to support the cables, including the rated holding
                         capacity expressed in thousand pound increments (e.g.,
                         2.2M) of such strands; and

                    (3)  sufficient information to identify and describe the
                         physical characteristics (size, dimensions, and weight)
                         of apparatus enclosures and other facilities to be
                         attached to SWBT's poles or placed in SWBT's conduit
                         system.

                (e) When it appears to Applicant that facilities modification,
                    capacity expansion, or make-ready work may be required to
                    accommodate Applicant's access requests, Applicant shall
                    describe the facilities modification, capacity expansion, or
                    make-ready work which Applicant proposes. Applicant shall
                    also describe its plans, if any, to use any infrequent
                    construction technique or connectivity solution authorized
                    under Section 6.03 to avoid high or unusual expenditures and
                    state its reasons for the use of such technique or solution.

                (f) Applicant acknowledges that the poles along a particular
                    pole line or route may include poles owned by firms (such as
                    electric utilities) other than SWBT, that it may be
                    necessary for SWBT to rearrange its facilities or perform
                    other make-ready work on poles other than poles it owns or
                    controls in order to accommodate Applicant's request for
                    access to SWBT's poles and that, at the time an application
                    is submitted, it may be difficult for Applicant to determine
                    with certainty whether a particular 


                                    PAGE 46
<PAGE>   331

                    pole is owned or controlled by SWBT or by another entity.
                    Accordingly, the application shall, to the extent feasible,
                    identify all poles utilized by SWBT (without regard to
                    ownership) along Applicant's proposed route.

                (g) Each application for a license under this Agreement shall be
                    accompanied by a construction schedule showing Applicant's
                    projected dates for beginning and completing construction at
                    the sites specified in the application. Information on this
                    schedule may be used by SWBT's engineering and outside plant
                    construction personnel in scheduling work required to
                    process Applicant's applications and scheduling such
                    capacity expansions, make-ready work, and facilities
                    modifications, if any, as may be necessary to accommodate
                    Applicant's facilities.

                (h) Applicant may include multiple cables in a single license
                    application and may provide multiple services (e.g., CATV
                    and non-CATV services) under the same cable sheath or
                    jacket. When both CATV and non-CATV services are provided
                    under the same cable sheath or jacket, or CATV and non-CATV
                    services are provided using different cables attached or
                    lashed to the same strand or otherwise occupying the same
                    space on a pole or the same duct or inner duct within a
                    conduit, Applicant will so advise SWBT and SWBT shall, if
                    permitted by law, adjust its charges to enable SWBT to
                    charge Applicant the rate applicable to telecommunications
                    carriers rather than the rate applicable to cable television
                    systems solely to provide cable service.

         9.03 Cooperation in the Application Process. The orderly processing of
applications submitted by Applicant and other firms seeking access to SWBT's
poles, ducts, conduits, and rights-of-way requires good faith cooperation and
coordination between SWBT's personnel and personnel acting on behalf of
Applicant and other firms seeking access. The parties therefore agree to the
following transitional procedures which will remain in effect during the term of
this Agreement unless earlier modified by mutual agreement of the parties.

                (a) Before submitting a formal written application for access to
                    SWBT's poles, ducts, conduits, and rights-of-way, the firm
                    submitting the application shall make a good faith
                    determination that it actually plans to attach facilities to
                    or place facilities within the poles, ducts, conduits, or
                    rights-of-way specified in the application. Applications
                    shall not be submitted for the purpose of holding or
                    reserving space which the applicant does not plan to use or
                    for the purpose of precluding SWBT or any other provider of
                    telecommunications or cable television services from using
                    such poles, ducts, conduits, or rights-of-way.

                                    PAGE 47
<PAGE>   332

                (b) Applicant shall only submit applications for access to
                    poles, ducts, conduits, and rights-of-way which it plans to
                    use within one year following the date access is granted and
                    shall use its best efforts to submit applications in an
                    orderly manner in accordance with Applicant's needs. If
                    Applicant contemplates the need to submit more than 10
                    applications within any 45-day period with respect to poles,
                    ducts, conduits, and rights-of-way within the territory of
                    any single SWBT construction district, Applicant shall give
                    SWBT advance notice as promptly as is reasonably
                    practicable.

                (c) No more than 300 poles shall be the subject of any single
                    pole attachment license application.

                (d) No more than 20 manholes shall be the subject of any single
                    conduit occupancy license application.

         9.04 Applicant's Priorities. When Applicant has multiple applications
on file within a single SWBT construction district, Applicant shall, at SWBT's
request, designate its desired priority of completion of pre-license surveys,
facilities modifications, capacity expansions, and make-ready work with respect
to all such applications.

         9.05 Pre-license Survey. A pre-license survey (including a review of
records and field inspection, if necessary) will be completed by SWBT after
Applicant has submitted its written license application as specified in Section
9.02 of this Agreement. SWBT shall not, without due cause and justification,
repeat pre-occupancy survey work performed by Applicant.

                (a) The field inspection portion of the pre-license survey,
                    which includes the visual inspection of existing pole and
                    conduit facilities, shall be performed by SWBT or its
                    authorized representative. Primary purposes of the field
                    inspection will be to enable SWBT to (1) confirm or
                    determine the facilities modification, capacity expansion,
                    and make-ready work, if any, necessary to accommodate
                    Applicant's facilities; (2) plan and engineer the facilities
                    modification, capacity expansion, and make-ready work, if
                    any, required to prepare SWBT's poles, ducts, conduits,
                    rights-of-way, and associated facilities for Applicant's
                    proposed attachments or occupancy; and (3) estimate the
                    costs associated with such facilities modification, capacity
                    expansion, or make-ready work. SWBT may dispense with the
                    field inspection if it appears that the information
                    necessary to process Applicant's license application is
                    already available from existing sources, including the
                    application forms and such other information as may be
                    available to SWBT. If Applicant has occupied the space
                    requested before the issuance of a license, a
                    post-installation inspection of Applicant's 


                                    PAGE 48
<PAGE>   333

                    facilities may be performed, in place of the field
                    inspection portion of the pre-license survey, to determine
                    whether such facilities are in compliance with the
                    specifications of Article 6 and other provisions of this
                    Agreement. In performing such inspection, SWBT will not,
                    without due cause and justification, repeat pre-occupancy
                    survey work performed by Applicant.

                (b) The administrative processing portion of the pre-license
                    survey (which includes processing the application and
                    reviewing records) will be performed by SWBT.

                (c) Before performing any portion of the pre-license survey,
                    SWBT shall obtain Applicant's written authorization to
                    perform such work. Authorization may be given, when
                    possible, when the application is submitted. No
                    authorization shall be required for post-installation
                    inspections of Applicant's facilities when installation has
                    occurred before the issuance of a license.

                   ARTICLE 10: ISSUANCE AND DENIAL OF LICENSES
                      (INCLUDING FACILITIES MODIFICATIONS,
                    CAPACITY EXPANSIONS, AND MAKE-READY WORK

        10.01 Response Within 45 Days. Within 45 days of Applicant's submission
of a license application pursuant to Section 9.02 of this Agreement, or within
such other period of time as may be mutually agreed upon in writing by the
parties, SWBT shall respond to the application. The response shall state whether
the application is being granted or denied. If denial is anticipated, or if SWBT
personnel involved in the processing of Applicant's request for access become
aware of hazardous substances at the site requested by Applicant, SWBT shall
promptly advise Applicant and shall, at Applicant's request, discuss
alternatives to denial and issues associated with the presence of such hazardous
substances. Additional state-specific response and notice requirements, if any,
shall be addressed by an addendum to this Agreement.

                (a) If access is granted, SWBT shall, no later than 45 days
                    after Applicant's submission of the license application,
                    further advise Applicant in writing (1) what facilities
                    modifications, capacity expansions, or make-ready work, if
                    any, will be required to prepare SWBT's pole or conduit
                    facilities, (2) provide Applicant an estimate of charges for
                    such facilities modifications, capacity expansions, or
                    make-ready work and (3) disclose to Applicant any hazardous
                    substances known by SWBT to be present at the site.

                (b) SWBT may take into account issues of capacity, safety,
                    reliability, and engineering when considering requests for
                    access, provided the assessment of such factors is done in a
                    nondiscriminatory manner. If 


                                    PAGE 49
<PAGE>   334

                    access is denied, SWBT shall confirm the denial in writing
                    by the 45th day after the receipt by SWBT of Applicant's
                    completed application. A denial of access shall be specific,
                    shall include all relevant evidence and information
                    supporting the denial, and shall explain how such evidence
                    and information relates to a denial of access for reasons of
                    lack of capacity, safety, reliability, or generally
                    applicable engineering purposes. If Applicant in its
                    completed application sets forth in writing specific
                    proposals for expanding capacity, the denial statement shall
                    specifically address such proposals.

                (c) Applicant agrees that if, at any time prior to the 45th day,
                    it has determined that it no longer seeks access to specific
                    poles, ducts, or conduit facilities, Applicant shall
                    promptly withdraw or amend its application, thereby
                    minimizing the administrative burdens on SWBT of processing
                    and responding to the application.

                (d) Notwithstanding the 45-day deadline, SWBT will, pursuant to
                    Section 8.03 of this Agreement, make available to Applicant
                    for immediate occupancy any pole, duct, or conduit space
                    which is not currently assigned, not designated as a
                    maintenance duct, and not subject to applicable make-ready
                    requirements.

                (e) If SWBT fails to respond in writing within 30 days of SWBT's
                    documented receipt of a license application pursuant to
                    Section 9.02 of this Agreement, or within such other period
                    of time as may be mutually agreed upon in writing by the
                    parties, Applicant may by written notice inquire whether
                    SWBT intends to deny Applicant's request for access. After
                    such notice has been given and receipt by SWBT of a properly
                    submitted license application has been confirmed, SWBT's
                    failure to respond in writing within 15 days after receipt
                    of the notice shall be deemed to constitute approval of the
                    request for access. In such event, Applicant shall be
                    entitled to occupy the space requested without the formality
                    of a license; provided, however, that nothing contained in
                    this subsection shall authorize Applicant to occupy space
                    already occupied or subject to a prior valid space
                    assignment to SWBT or any third-party; and provided further
                    that nothing in this subsection authorizes Applicant,
                    without first obtaining SWBT's written authorization, to (1)
                    place its facilities on any pole or in any duct or conduit
                    that requires make-ready work (other than third-party
                    make-ready work arranged directly by Applicant) or (2)
                    utilize any infrequent construction technique or
                    connectivity solution described in Section 6.03.

        10.02 Obligation to Construct or Modify Facilities; Capacity Expansions.
SWBT may grant access subject to Applicant's approval of such make-ready work
(including facilities modifications) as may be required to expand capacity to
accommodate 


                                    PAGE 50
<PAGE>   335

Applicant's request, in which event Applicant shall either accept
such conditions, initiate good faith negotiations to explore other potential
accommodations, or withdraw its request for access. If SWBT does not offer to
expand capacity and denies Applicant's request for access, SWBT shall promptly
notify Applicant of such determination. SWBT shall not deny Applicant's request
for access on lack of capacity grounds when capacity can be expanded as provided
in this section and in Section 6.03 (infrequent construction techniques and
connectivity solutions).

                (a) At Applicant's request, SWBT will replace, expand, or modify
                    its poles and conduit system, or otherwise expand the
                    capacity of such facilities to accommodate the placement of
                    Applicant's facilities; provided, however, that such
                    modifications shall be consistent with the capacity, safety,
                    reliability, and engineering considerations which SWBT would
                    apply to itself if the work were performed for SWBT's own
                    benefit. Outside plant facilities modifications and capacity
                    expansions contemplated by this subsection include, but are
                    not limited to, installation of inner duct, cable
                    consolidations and the removal of cables that are retired or
                    inactive (dead). Except as otherwise specifically provided
                    in this section, SWBT may recover from Applicant the costs
                    of facilities modifications and capacity expansions to make
                    space available for Applicant's facilities and charges for
                    such modifications and expansions shall be determined and
                    billed as provided in APPENDIX I of this Agreement.

                (b) SWBT will, at its own expense, install inner duct in SWBT's
                    conduit system as necessary to make space available for
                    Applicant's facilities. Inner duct installations to
                    accommodate Applicant's facilities will be performed by SWBT
                    within the same time intervals which would apply if SWBT
                    were performing such installations for itself. If SWBT's
                    intervals for beginning or completing inner duct
                    installation do not meet Applicant's needs, Applicant may
                    arrange for the inner duct installation to be performed by
                    an authorized contractor selected by Applicant from a list,
                    jointly developed and maintained by the parties, of
                    contractors mutually approved as qualified to perform inner
                    duct installations. Applicant may install the inner duct
                    itself if Applicant is on the list of mutually approved
                    contractors at the time the work is performed. When inner
                    duct is installed in SWBT's conduit system by Applicant or
                    an authorized contractor selected by Applicant, SWBT will
                    provide the inner-ducting materials to be installed and
                    Applicant shall bear all other installation expenses.
                    Applicant shall give SWBT sufficient advance notice of the
                    materials needed to enable SWBT to provide such materials to
                    Applicant on a timely basis. Applicant shall return all
                    unused materials, including unused inner duct and reels, to
                    SWBT or purchase them from SWBT. Inner duct installed by
                    Applicant or an authorized contractor selected by Applicant
                    shall be installed in accordance with 

                                    PAGE 51
<PAGE>   336

                    SWBT's specifications and in accordance with the same
                    standards and practices which would be followed if the inner
                    duct were being installed by SWBT or SWBT's contractors.
                    Applicant shall indemnify, on request defend, and hold SWBT
                    harmless for any injuries, losses, damages, claims, or
                    liabilities directly resulting from the installation of
                    inner duct by Applicant or any authorized contractor
                    selected by Applicant under this subsection. Applicant shall
                    not, without SWBT's prior written approval, arrange for
                    inner duct installation to be performed by subcontractors
                    who are not authorized contractors.

                (c) SWBT shall, at its expense, remove cables that are retired
                    or inactive (dead) to free-up requested duct and pole space,
                    provided that such removal is reasonably feasible (i.e.,
                    cable pulls easily without incident). If a section of cable
                    is "frozen" in a duct and would require excavation to
                    remove, Applicant may, at its option, request that SWBT
                    excavate the obstruction or, in the alternative, arrange for
                    excavation of the obstruction to be performed by an
                    authorized contractor selected by Applicant from a list,
                    jointly developed and maintained by the parties, of
                    contractors mutually approved as qualified to perform such
                    excavations. Applicant may excavate the obstruction itself
                    if Applicant is on the list of mutually approved contractors
                    at the time the work is performed. Such excavations will be
                    at Applicant's expense. Removal of the remainder of the
                    cable will be at SWBT's expense. Excavation work performed
                    by Applicant or an authorized contractor selected by
                    Applicant shall be performed in accordance with SWBT's
                    specifications and in accordance with the same standards and
                    practices which would be followed if such excavation work
                    were being performed by SWBT or SWBT's contractors. Neither
                    Applicant nor any authorized contractor selected by
                    Applicant to perform excavation work under this subsection
                    shall conduct facility excavation activities in any manner
                    which jeopardizes or degrades the integrity of SWBT's
                    structures or interferes with any existing use of the
                    facilities. Applicant shall indemnify, on request defend,
                    and hold SWBT harmless for any injuries, losses, damages,
                    claims, or liabilities directly resulting from the
                    performance of excavation work by Applicant or any
                    authorized contractor selected by Applicant under this
                    subsection. Applicant shall not, without SWBT's prior
                    written approval, arrange for excavation work to be
                    performed under this subsection by subcontractors who are
                    not qualified contractors.

        10.03 Issuance of Licenses and Immediate Access When No Make-ready Work
is Required. If, on the basis of Applicant's representations or SWBT's field
inspection, if any, SWBT determines that no make-ready work is necessary to
accommodate Applicant's facilities, SWBT will issue a license without performing
make-ready work and pole attachment or conduit occupancy space will be made
available to Applicant for 

                                    PAGE 52
<PAGE>   337

immediate occupancy. Immediate occupancy prior to the issuance of a license
shall be governed by Section 8.03.

        10.04 Make-ready Work. If SWBT determines that make-ready work will be
necessary to accommodate Applicant's facilities, SWBT shall promptly notify
Applicant of the make-ready work proposed to enable the accommodation of
Applicant's facilities.

                (a) The notice shall be given in writing no later than 45 days
                    after the receipt by SWBT of Applicant's completed
                    application pursuant to Section 9.02 of this Agreement or
                    within such other period of time as may be mutually agreed
                    upon in writing by the parties.

                (b) The notice will include SWBT's estimate of make-ready
                    charges, which estimate shall be stated on SWBT Form SW-9434
                    ("Access Application and Make-Ready Authorization"), a copy
                    of which is attached hereto as part of APPENDIX III.

                (c) Applicant shall have 20 days (the "acceptance period") after
                    receiving SWBT's estimate of make-ready charges to authorize
                    completion of the make-ready work proposed by SWBT or to
                    advise SWBT of its willingness to perform the proposed
                    make-ready work itself. If Applicant advises SWBT that it is
                    willing to perform the make-ready work proposed by SWBT in
                    accordance with SWBT's plans and specifications, SWBT will
                    not, without due cause and justification, refuse to accept
                    Applicant's offer to perform the work. Authorization shall
                    be accomplished by Applicant's signing the estimate and
                    returning it to SWBT within the 20-day acceptance period.

                (d) Within the 20-day acceptance period, the parties may
                    negotiate modifications of the make-ready work to be
                    performed. If the parties reach agreement through
                    negotiation, a new estimate shall be prepared and
                    authorization shall be accomplished by Applicant's signing
                    the revised estimate and returning it to SWBT within the
                    original 20-day acceptance period, or within such period of
                    time as may be mutually agreed upon by the parties.

                (e) If Applicant does not sign and return the estimate within
                    the 20-day acceptance period, or within such other period of
                    time as may be mutually agreed upon in writing by the
                    parties, Applicant shall notify SWBT in writing by the 20th
                    day whether Applicant is withdrawing its application,
                    electing to perform the make-ready work itself as provided
                    in subsection (c) or electing to treat SWBT's make-ready
                    requirements as a denial of access.

                                    PAGE 53
<PAGE>   338

                    (1)  If no such notice is given by the 20th day, or such
                         later date as may be mutually agreed upon by the
                         parties, SWBT shall contact Applicant to determine
                         whether Applicant intends to withdraw its application.
                         Applicant shall be deemed to have withdrawn its
                         application if, in response to SWBT's inquiry,
                         Applicant does not immediately sign and return the
                         estimate to SWBT.

                    (2)  If Applicant timely notifies SWBT that it is electing
                         to treat SWBT's make-ready requirements as a denial of
                         access, SWBT shall, within 20 days after receiving the
                         notice, provide Applicant with a written statement
                         explaining its decision to grant access only if the
                         specified make-ready work is performed. The statement
                         shall be specific, shall include all relevant evidence
                         and information supporting SWBT's decision to grant
                         access only if the specified make-ready work is
                         performed, and shall explain how such evidence and
                         information relates to SWBT's decision for reasons of
                         lack of capacity, safety, reliability, or generally
                         applicable engineering purposes. The statement shall
                         also set forth the basis for SWBT's make-ready
                         proposals and specifically address SWBT's rationale for
                         rejecting Applicant's alternative written proposals, if
                         any.

        10.05 Performance of Make-ready Work. Except as otherwise specifically
provided in Section 10.02 and in this section, make-ready work shall be
performed by SWBT or by contractors, subcontractors, or other persons acting on
SWBT's behalf and shall be performed by SWBT in accordance with the same time
intervals which would be applicable if SWBT were performing the work for itself.

                (a) Applicant and SWBT will mutually establish and maintain for
                    each SWBT construction district lists of authorized
                    contractors which may be selected by Applicant to perform
                    make-ready work when SWBT's interval for beginning or
                    completing such make-ready work does not meet Applicant's
                    needs. At Applicant's request, Applicant will be included on
                    such lists upon Applicant's demonstrating that (1) its
                    personnel are qualified to perform such work in accordance
                    with SWBT's specifications and (2) Applicant meets the
                    financial responsibility (insurance and bonding)
                    requirements generally applicable to contractors,
                    subcontractors, and other vendors performing the same or
                    similar work on SWBT's behalf or the self-insurance
                    requirements of Section 23.02.

                (b) If SWBT's interval for beginning or completing make-ready
                    work does not meet Applicant's needs, Applicant may (1)
                    perform the make-ready work itself, if Applicant is on the
                    applicable list of authorized contractors at the time the
                    work is to be performed or (2) arrange for the work to be
                    performed by an authorized contractor selected by Applicant


                                    PAGE 54
<PAGE>   339

                    from the applicable list of authorized contractors. Subject
                    to the availability of personnel, Applicant may also request
                    that SWBT perform the work on an expedited basis; provided,
                    however, that make-ready work will not be performed on an
                    expedited basis unless Applicant first approves any overtime
                    or premium rates or charges associated with performance of
                    the work on an expedited basis.

                (c) From time to time, additional contractors, subcontractors or
                    other vendors may be jointly approved by Applicant and SWBT
                    to perform specific make-ready work in the event that the
                    work load exceeds the capacity of the authorized contractors
                    on the approved list to perform the make-ready work in a
                    timely manner.

                (d) Make-ready work performed by Applicant, by an authorized
                    contractor selected by Applicant, or by a contractor,
                    subcontractor, or other vendor jointly approved by the
                    parties under subsection (c) shall be performed in
                    accordance with SWBT's specifications and in accordance with
                    the same standards and practices which would be followed if
                    such excavation work were being performed by SWBT or SWBT's
                    contractors. Neither Applicant nor authorized contractors
                    selected by Applicant to perform make-ready work under this
                    section shall conduct such work in any manner which
                    jeopardizes or degrades the integrity of SWBT's structures
                    or interferes with any existing use of SWBT's facilities.
                    Applicant and any authorized contractor selected by
                    Applicant to perform make-ready work shall indemnify, on
                    request defend, and hold SWBT harmless from any and all
                    injuries, losses, damages, claims, or liabilities directly
                    resulting from their activities under this section.

                (e) Nothing contained in this section authorizes Applicant, any
                    authorized contractor selected by Applicant, or any other
                    person acting on Applicant's behalf to consolidate SWBT's
                    cables.

        10.06 Multiple Applications. Applications shall be processed on a
first-come, first-served basis. Applications filed on the same date shall be
treated as having been filed simultaneously and shall be processed accordingly.

        10.07 Payments to Others for Expenses Incurred in Transferring or
Arranging Their Facilities. Applicant shall make arrangements with the owners of
other facilities attached to SWBT's poles or occupying space in SWBT's conduit
system regarding reimbursement for any expenses incurred by them in transferring
or rearranging their facilities to accommodate the attachment or placement of
Applicant's facilities to or in SWBT's poles, ducts, and conduits.

        10.08 Reimbursement for the Creation or Use of Additional Capacity. As a
result of facilities modification, capacity expansion, or other make-ready work
performed to 

                                    PAGE 55

<PAGE>   340

accommodate Applicant's facilities, additional capacity may become
available on SWBT's poles or in its conduit system. In such event, Applicant
shall not have a preferential right to utilize such additional capacity in the
future and shall not be entitled to any pole attachment or conduit occupancy
fees subsequently paid to SWBT for the use of such additional capacity. SWBT
shall, however, establish procedures for giving Applicant notice of the
subsequent use by SWBT or third parties of additional space or capacity created
at Applicant's expense. If SWBT utilizes additional space or capacity created at
Applicant's expense, SWBT will reimburse Applicant on a pro-rata basis for
SWBT's share, if any, of Applicant's capacity expansion costs, to the extent
reimbursement is required by the Pole Attachment Act and applicable rules,
regulations, and commission orders. If any third party later utilizes any such
additional space or capacity, SWBT shall, at the request of Applicant or such
third party, provide such information as may be available to SWBT to assist
Applicant and such third party in determining the amount, if any, which such
third party may owe Applicant as its pro-rata share of Applicant's capacity
expansion costs. Nothing contained in this section shall be construed as
conferring or imposing on SWBT any right or duty to determine the amounts owing
by a third party to Applicant, to collect or remit any such amounts to
Applicant, to resolve or adjudicate disputes over reimbursement between
Applicant and third parties, to deny a third party access to SWBT's poles,
ducts, conduits, or rights-of-way due to such third party's failure to satisfy
Applicant's reimbursement demands, or to take any other action to enforce
Applicant's reimbursement rights against any third party. In like manner, for
additional capacity created by SWBT from and after the date of enactment of the
Telecommunications Act of 1996, SWBT shall be entitled to recover from Applicant
and third parties, to the full extent permitted by law, their pro-rata shares of
such capacity expansion costs incurred by SWBT. To the extent that either party
seeks to avail itself of this cost-saving mechanism, such party shall be
responsible for maintaining adequate records documenting the costs subject to
reimbursement, including but not limited to costs incurred for facilities
modification and capacity expansion work performed directly by such party or
contractors performing work on such party's behalf.

        10.09 License and Attachment. After all required make-ready work is
completed, SWBT will issue a license confirming that Applicant may attach
specified facilities to SWBT's poles or place specified facilities in SWBT's
conduit system. Applicant shall have access to attach or place only those
facilities specifically described in licenses subject to this Agreement, and no
others, except as otherwise specifically provided in (a) Sections 8.03 and 12.03
or other provisions of this Agreement, (b) any other written agreement between
the parties providing for such access, or (c) the provisions of any applicable
tariffs or commission orders.

               ARTICLE 11: CONSTRUCTION OF APPLICANT'S FACILITIES

        11.01 Responsibility for Attaching and Placing Facilities. Each party
shall be responsible for the actual attachment of its own facilities to SWBT's
poles and the placement of such facilities in SWBT's ducts, conduits, and
rights-of-way and shall be solely responsible for all costs and expenses
incurred by it or on its behalf in connection 

                                    PAGE 56
<PAGE>   341

with such activities. In this regard, each party and its contractors shall be
solely responsible for (a) paying all persons and entities who provide
materials, labor, access to real or personal property, or other goods or
services in connection with the construction and attachment of its facilities
and (b) directing the activities of all personnel acting on such party's behalf
while they are physically present on, within, or in the vicinity of SWBT's
poles, ducts, conduits, and rights-of-way.

        11.02 Construction Schedule. After the issuance of a license, Applicant
shall provide SWBT with an updated construction schedule and thereafter keep
SWBT informed of anticipated changes in the construction schedule. Construction
schedules received by SWBT shall be subject to the provisions of Article 28 of
this Agreement (Confidentiality of Information). Construction schedules required
by this section shall include, at a minimum, the following information:

                (a) the name, title, business address, and business telephone
                    number of the manager responsible for construction of the
                    facilities;

                (b) the names of each contractor and subcontractor which will be
                    involved in the construction activities;

                (c) the estimated dates when construction will begin and end;
                    and

                (d) the approximate dates when Applicant or personnel working on
                    Applicant's behalf will be performing construction work in
                    connection with the attachment of Applicant's facilities to
                    SWBT's poles or the placement of Applicant's facilities in
                    any part of SWBT's conduit system.

                     ARTICLE 12: USE AND ROUTINE MAINTENANCE
                            OF APPLICANT'S FACILITIES

        12.01 Use of Applicant's Facilities. Each license subject to this
Agreement authorizes Applicant to have access to Applicant's facilities on or
within SWBT's poles, ducts, and conduits as needed for the purpose of serving
Applicant's customers.

        12.02 Routine Maintenance of Applicant's Facilities. Each license
subject to this Agreement authorizes Applicant to engage in routine maintenance
of facilities located on or within SWBT's poles, ducts, and conduits. Routine
maintenance does not include the replacement or modification of Applicant's
facilities in any manner which results in Applicant's facilities differing
substantially in size, weight, or physical characteristics from the facilities
described in Applicant's license.

        12.03 Installation of Drive Rings and J-Hooks. Applicant may install
drive rings and J-hooks on SWBT's poles for the attachment of drop wires as
specified in this section.

                                    PAGE 57


<PAGE>   342

                (a) Drive rings and J-hooks may be installed as specified in
                    pole attachment licenses issued to Applicant.

                (b) If attachment space has already been licensed to Applicant
                    on a given SWBT pole, Applicant may install drive rings and
                    J-hooks within the space assigned to Applicant (typically
                    six inches above and six inches below Applicant's point of
                    attachment on the pole if the point of attachment is in the
                    center of the space assigned to Applicant) without applying
                    for or obtaining a new or amended license. No additional
                    attachment charges shall apply with respect to drive rings
                    and J-hooks installed in Applicant's licensed attachment
                    space.

                (c) Applicant's first choice for placement of drive rings and
                    J-hooks shall be the licensed attachment space assigned to
                    Applicant as provided in subsection (b) above; provided,
                    however, that if attachment space already licensed to
                    Applicant on a given SWBT pole is not adequate for
                    Applicant's drive rings or J-hooks, Applicant may, when
                    necessary, and without applying for or obtaining a new or
                    amended license, install such drive rings and J-hooks above
                    or below Applicant's licensed attachment space as described
                    in subsection (b) above. No additional attachment charges
                    shall apply with respect to drive rings and J-hooks
                    installed outside Applicant's licensed attachment space as
                    permitted in this subsection.

                (d) If Applicant has not already been licensed attachment space
                    on a given SWBT pole, Applicant may, when necessary, install
                    drive rings and J-hooks to unassigned space on such pole
                    without first obtaining a license for such attachment and
                    shall, promptly following such installation, notify SWBT of
                    the attachment. Such notification shall be made on a form to
                    be developed by SWBT for this purpose and shall constitute
                    an application for a license. Such application may be
                    conditionally granted without a pre-license survey or other
                    inquiry by SWBT, and SWBT shall not be required to process
                    the application, log the attachment as an assignment in its
                    outside plant records, or issue a permanent license for the
                    attachment unless specifically requested by Applicant to do
                    so; provided, however, that a conditionally granted
                    application under this subsection shall be subject to
                    revocation if it is subsequently determined that such
                    attachment has been made in violation of subsection (e) of
                    this section or other provisions of this Agreement.
                    Drive-rings and J-hooks installed pursuant to this
                    subsection are pole attachments and charges for such
                    attachments shall be determined in accordance with the Pole
                    Attachment Act and applicable rules, regulations, and
                    commission orders.


                                    PAGE 58
<PAGE>   343

                (e) Notwithstanding the provisions of subsections (c)-(d) above,
                    Applicant may not install drive rings and J-hooks in space
                    assigned to SWBT or another joint user without the approval
                    of SWBT or such other joint user and may not install drive
                    rings and J-hooks in unassigned space in any manner which
                    will block or preclude the subsequent occupancy or use of
                    space by SWBT or other joint users. If the presence of
                    Applicant's facilities in space not assigned to Applicant
                    will block or preclude the use of assigned or otherwise
                    assignable space by SWBT or other joint users, Applicant
                    shall, on SWBT's request, promptly relocate the facilities
                    in order to accommodate the facilities of other users and
                    shall bear all expenses associated with such relocation.

                (f) SWBT may not install drive rings or J-hooks in space
                    assigned to Applicant without Applicant's approval and
                    shall, at Applicant's request, and at SWBT's expense,
                    promptly relocate or, if necessary, remove, any drive rings
                    or J-hooks installed in violation of this subsection. If
                    SWBT drive rings or J-hooks have been installed in space
                    subsequently assigned to Applicant, or if the presence of
                    SWBT drive rings or J-hooks blocks or precludes the use of
                    otherwise assignable space on SWBT's poles, SWBT shall, at
                    Applicant's request, relocate such facilities, if it is
                    feasible to do so, as make-ready work.

                (g) Applicant shall, at the request of SWBT or another joint
                    user, at Applicant's expense, promptly relocate or, if
                    necessary, remove any drive rings and J-hooks placed on
                    SWBT's poles other than as permitted in this section.

        12.04 Short-term Use of Maintenance Ducts for Repair and Maintenance
Activities. Maintenance ducts shall be available, on a nondiscriminatory basis,
for short-term (not to exceed 30 days) non-emergency maintenance or repair
activities by any person or entity (including but not limited to SWBT,
Applicant, other local service providers, and other joint users) with facilities
in the conduit section in which the maintenance duct is located; provided,
however, that use of the maintenance duct for non-emergency maintenance and
repair activities must be scheduled by SWBT. A person or entity using the
maintenance duct for non-emergency maintenance or repair activities shall
immediately notify SWBT of such use and must either vacate the maintenance duct
within 30 days or, with SWBT's consent, which consent shall not be unreasonably
withheld, rearrange its facilities to ensure that at least one full-sized
replacement maintenance duct (or, if the designated maintenance duct was an
inner duct, a suitable replacement inner duct) is available for use by all
occupants in the conduit section within 30 days after such person or entity
occupies the maintenance duct. Cables temporarily placed in the maintenance duct
on a non-emergency basis shall be subject to such accommodations as may be
necessary to rectify emergencies which may occur while the maintenance duct is
occupied.

                                    PAGE 59
<PAGE>   344

        12.05 Responsibility for Maintenance of Facilities. Each party shall be
solely responsible for maintaining its own facilities and (a) paying all persons
and entities who provide materials, labor, access to real or personal property,
or other goods or services in connection with the maintenance of such party's
facilities and (b) directing the activities of all such personnel while they are
physically present on, within, or in the vicinity of SWBT's poles, ducts,
conduits, and rights-of-way.

        12.06 Information Concerning the Maintenance of Applicant's Facilities.
Promptly after the issuance of a license, Applicant shall provide SWBT with the
name, title, business address, and business telephone number of the manager
responsible for routine maintenance of Applicant's facilities and shall
thereafter notify SWBT of changes to such information. The manager responsible
for routine maintenance of Applicant's facilities shall, on SWBT's request,
identify any contractor, subcontractor, or other person performing maintenance
activities on Applicant's behalf at a specified site.

               ARTICLE 13: MODIFICATION OF APPLICANT'S FACILITIES

        13.01 Notification of Planned Modifications. Applicant shall notify SWBT
in writing at least 30 days before adding to, relocating, replacing or otherwise
modifying its facilities already attached to a SWBT pole or located in any SWBT
duct or conduit. The notice shall contain sufficient information to enable SWBT
to determine whether the proposed addition, relocation, replacement, or
modification is within the scope of Applicant's present license or requires a
new or amended license. No notice shall be required for such routine
modifications as the installation or placement of drive rings or J-hooks,
terminals, and other ancillary apparatus routinely used in providing service to
customers, having no effect on the structural integrity of SWBT's poles, ducts,
or conduits, and having no effect on the ability of SWBT or joint users to use
or have access to SWBT's poles, ducts, conduits, or rights-of-way.

        13.02     New or Amended License Required.  A new or amended license 
will be required if the proposed addition, relocation, replacement, or 
modification:

                (a) requires that Applicant occupy additional space on SWBT's
                    poles (except on a temporary basis in the event of an
                    emergency);

                (b) requires that Applicant occupy additional space (other than
                    space in the maintenance duct in accordance with Sections
                    12.04, 13.03, and 15.02 of this Agreement) in any SWBT duct
                    or conduit except on a temporary basis in the event of an
                    emergency;

                (c) results in the facilities attached to SWBT's poles or placed
                    in SWBT's ducts or conduits being different from those
                    described in Applicant's current license (e.g., different
                    duct or size increase causing a need to recalculate storm
                    loadings, guying, or pole class); or

                                    PAGE 60

<PAGE>   345

                (d) requires additional holding capacity on a permanent basis.

        13.03 Use of Maintenance Duct in Connection with Facility Modifications
and Replacements. Non-emergency access to the maintenance duct in connection
with facilities modifications and replacements shall be subject to the
provisions of Section 12.04 of this Agreement.

        13.04 Replacement of Facilities and Spinning/Overlashing Additional
Cables. Applicant may replace existing facilities with new facilities occupying
the same pole, duct, or conduit space, and may spin or overlash additional
cables to its own existing facilities; provided, however, that such activities
shall not be considered to be routine maintenance and shall be subject to the
requirements of this article.

        13.05 Streamlined Procedures for the Issuance of Amended Licenses. SWBT
may streamline procedures for the issuance of amended licenses with respect to
proposed additions, relocations, replacements, or modifications of Applicant's
facilities when it appears to SWBT that the proposed additions, relocations,
replacements, or modifications will not require make-ready work by SWBT, will
not interfere with SWBT's use of its poles, conduit systems, or facilities
attached or connected thereto or contained therein, and will not interfere with
the use of existing facilities attached or connected thereto or contained
therein by joint users.

                       ARTICLE 14: REQUIRED REARRANGEMENTS
                            OF APPLICANT'S FACILITIES

        14.01 Notice of Planned Modifications. The parties acknowledge that the
Pole Attachment Act recites in part that "Whenever the owner of a pole, duct,
conduit, or right-of-way intends to modify or alter such pole, duct, conduit, or
right-of-way, the owner shall provide written notification of such action to any
entity that has obtained an attachment to such conduit or right-of-way so that
such entity may have a reasonable opportunity to add to or modify its existing
attachment." The parties further acknowledge that the FCC, in the First
Interconnection Order in CC Docket No. 96-98, recites that "... absent a private
agreement establishing notification procedures, written notification of a
modification must be provided to parties holding attachments on the facility to
be modified at least 60 days prior to the commencement of the physical
modification itself." This article is intended by the parties to alter the
above-described notification requirements only as provided in Section 14.02(b)
below.

        14.02 Required Rearrangement of Applicant's Facilities. Applicant
acknowledges that, from time to time, it may be necessary or desirable for SWBT
to rearrange facilities on or within its poles or conduit systems, change out
poles, add poles to a pole line, relocate or reconstruct poles, pole lines,
conduit segments, or conduit runs, enlarge manholes, reinforce conduit, or
otherwise modify poles, pole lines, or portions of its conduit system and that
such changes may be necessitated by SWBT's own business needs or by factors
outside of SWBT's control, such as the decision by a municipality to 

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widen streets or the decision by a third party to seek access to SWBT's poles,
ducts, conduits, or rights-of-way.

                (a) Applicant agrees that Applicant will cooperate with SWBT and
                    joint users in making such rearrangements as may be
                    necessary to enable such changes to be made and that costs
                    incurred by Applicant in making such rearrangements shall,
                    in the absence of a specific agreement to the contrary, be
                    borne by the parties in accordance with then applicable
                    statutes, rules, regulations, and commission orders,
                    including the Pole Attachment Act, rules, regulations, and
                    commission orders thereunder.

                (b) Whenever feasible, SWBT shall give Applicant not less than
                    60 days prior written notice of the need for Applicant to
                    rearrange its facilities pursuant to this section. The
                    notice shall state the date by which such rearrangements are
                    to be completed. Applicant shall complete such
                    rearrangements within the time prescribed in the notice.
                    SWBT may request that such modification be made within a
                    shorter period of time, in which event Applicant shall not
                    refuse to comply such request without due cause and
                    justification. In determining due cause and justification,
                    the following factors, among others, may be considered:

                    (1)  the circumstances under which the rearrangements are
                         sought (e.g., street-widening project, request by a
                         competing provider for access);

                    (2)  the timeliness of SWBT's request to Applicant;

                    (3)  the nature and number of rearrangements sought;

                    (4)  the impact on the ability of the parties and joint 
                         users to meet customer service needs; and

                    (5)  risks of service interruption to customers of the
                         parties and joint users.

                (c) Nothing contained in this article shall preclude Applicant
                    from advising SWBT, within 60 days from the date of the
                    notice, of its desire to add to or modify its existing
                    attachment.

               ARTICLE 15: EMERGENCY REPAIRS AND POLE REPLACEMENTS

        15.01 Applicability. The parties acknowledge that in the event of an
emergency, services provided by the parties and joint users to their respective
customers may be interrupted, that it may not be possible for all service
providers with facilities attached to SWBT's poles or placed in SWBT's ducts,
conduits, or rights-of-way to restore service to all customers at the same time,
that disputes may arise between the parties concerning the 

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manner in which emergency repairs shall be made, that it is essential that
decisions be made quickly, and that it is highly desirable that all service
providers utilizing SWBT's poles, ducts, conduits, and rights-of-way enter into
appropriate arrangements relating to emergency repairs and service restoration.
In the absence of prearranged agreements, it is expected that disputes will be
immediately resolved at the site by the affected parties present based upon the
criteria set forth in Section 15.05 of this Agreement. The provisions of this
article shall apply in the absence of more comprehensive agreements relating to
emergency repairs.

        15.02 Responsibility for Emergency Repairs; Access to Maintenance Duct.
In general, each party shall be responsible for making emergency repairs to its
own facilities and for formulating appropriate plans and practices enabling such
party to make such repairs.

                (a) Nothing contained in this Agreement shall be construed as
                    requiring either party to perform any repair or service
                    restoration work of any kind with respect to the other
                    party's facilities or the facilities of joint users.

                (b) Maintenance ducts shall be available, on a nondiscriminatory
                    basis, for emergency repair activities by any person or
                    entity (including but not limited to SWBT, Applicant, other
                    local service providers, and other joint users) with
                    facilities in the conduit section in which the maintenance
                    duct is located; provided, however, that a person or entity
                    using the maintenance duct for emergency repair activities
                    shall immediately notify SWBT of such use and must either
                    vacate the maintenance duct within 30 days or, with SWBT's
                    consent, which consent shall not be unreasonably withheld,
                    rearrange its facilities to ensure that at least one
                    full-sized replacement maintenance duct (or, if the
                    designated maintenance duct was an inner duct, a suitable
                    replacement inner duct) is available for use by all
                    occupants in the conduit section within 30 days after such
                    person or entity occupies the maintenance duct. The parties
                    agree not to exceed 30 days' use except in unusual
                    emergencies that may require longer than 30 days to rectify.

                (c) If necessary, other unoccupied ducts or inner ducts may be
                    used on a short-term basis when the maintenance duct is
                    unavailable. Any such use shall be subject to the same rules
                    applicable to the maintenance duct and shall be subject to
                    the rights of any party or joint user to whom such duct or
                    inner duct has been assigned.

        15.03 Designation of Emergency Repair Coordinators and Other
Information. For each SWBT construction district, Applicant shall provide SWBT
with the emergency contact number of Applicant's designated point of contact for
coordinating the handling of emergency repairs of Applicant's facilities and
shall thereafter notify SWBT of changes to such information.


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<PAGE>   348

        15.04 Reporting of Conditions Requiring Emergency Repairs. As a
courtesy, each party shall endeavor to notify the other party at the earliest
practicable opportunity after discovering any condition on or in any of SWBT's
poles, ducts, conduits, or rights-of-way requiring emergency repairs to the
other party's facilities.

        15.05 Order of Precedence of Work Operations; Access to Maintenance Duct
and Other Unoccupied Ducts in Emergency Situations. When notice and coordination
are practicable, SWBT, Applicant, and other affected parties shall coordinate
repair and other work operations in emergency situations involving service
disruptions. Disputes will be immediately resolved at the site by the affected
parties present in accordance with the following principles.

                (a) Emergency service restoration work requirements shall take
                    precedence over other work operations.

                (b) Except as otherwise agreed upon by the parties, restoration
                    of lines for emergency services providers (e.g., 911, fire,
                    police, and hospital lines) shall be given the highest
                    priority and temporary occupancy of the maintenance duct
                    (and, if necessary, other unoccupied ducts) shall be
                    assigned in a manner consistent with this priority.
                    Secondary priority shall be given to restoring services to
                    the local service providers with the greatest numbers of
                    local lines out of service due to the emergency being
                    rectified. The parties shall exercise good faith in
                    assigning priorities, shall base their decisions on the best
                    information then available to them at the site in question,
                    and may, by mutual agreement at the site, take other factors
                    into consideration in assigning priorities and sequencing
                    service restoration activities.

                (c) SWBT shall determine the order of precedence of work
                    operations and assignment of duct space in the maintenance
                    duct (and other unoccupied ducts) only if the affected
                    parties present are unable to reach prompt agreement;
                    provided, however, that these decisions shall be made by
                    SWBT on a nondiscriminatory basis in accordance with the
                    principles set forth in this section.

        15.06 Unilateral Corrective Action. When either party reasonably
believes that, due to the condition of the other party's facilities placed on,
within, or in the vicinity of SWBT's poles, ducts, conduits, or rights-of-way,
there is an immediate or imminent threat to the safety or health of employees or
any other person, to the physical integrity or functioning of either party, or
either party's ability to meet its service obligations, either party may
unilaterally perform such limited corrective work as may be necessary to prevent
or mitigate against the injury threatened. For example, if facilities of the
other party have become detached or partially detached from a pole, or detached
or partially 

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detached from supporting racks or wall supports within a manhole,
either party may reattach them as provided in this section but shall not be
obligated to do so.

                (a) Before performing any corrective work involving facilities
                    of the other party, SWBT or Applicant shall first attempt to
                    notify the other party. After such notice has been given,
                    the parties shall coordinate corrective work.

                (b) When an emergency situation exists such that advance notice
                    and coordination are not practicable, either party may
                    perform corrective work without first giving notice to the
                    other party and shall promptly notify the other party of the
                    corrective work performed and the reason why notice was not
                    given.

        15.07   Emergency Pole Replacements.  Applicant will cooperate fully 
with SWBT when emergency pole replacements are required.

                (a) When emergency pole replacements are required, SWBT shall
                    promptly make a good faith effort to contact Applicant to
                    notify Applicant of the emergency and to determine whether
                    Applicant will respond to the emergency in a timely manner.

                (b) If notified by SWBT that an emergency exists which will
                    require the replacement of a pole, Applicant shall transfer
                    its facilities immediately, provided such transfer is
                    necessary to rectify the emergency. If the transfer is to a
                    SWBT replacement pole, the transfer shall be in accordance
                    with SWBT's placement instructions.

                (c) If Applicant is unable to respond to the emergency situation
                    immediately, Applicant shall so advise SWBT and thereby
                    authorize SWBT (or any joint user sharing the pole with
                    SWBT) to perform such emergency-necessitated transfers (and
                    associated facilities rearrangements) on Applicant's behalf.

        15.08 Expenses Associated with Emergency Repairs. Each party shall bear
all reasonable expenses arising out of or in connection with emergency repairs
of its own facilities and transfers or rearrangements of such facilities
associated with emergency pole replacements made in accordance with the
provisions of this article.

                (a) Each party shall be solely responsible for paying all
                    persons and entities who provide materials, labor, access to
                    real or personal property, or other goods or services in
                    connection with any such repair, transfer, or rearrangement
                    of such party's facilities.

                                    PAGE 65

<PAGE>   350

                (b) Applicant shall reimburse SWBT for the costs incurred by
                    SWBT for work performed by SWBT on Applicant's behalf in
                    accordance with the provisions of this article; provided,
                    however, that when the costs incurred by SWBT are for work
                    performed in part for Applicant and in part for SWBT and
                    third parties, Applicant shall only reimburse SWBT for
                    Applicant's pro-rata share of the costs.

            ARTICLE 16: INSPECTION BY SWBT OF APPLICANT'S FACILITIES

        16.01 SWBT's Right to Make Periodic or Spot Inspections. SWBT shall have
the right, but not the duty, to make periodic or spot inspections at any time of
any or all facilities attached to SWBT's poles or placed within SWBT's poles,
ducts, conduits, or rights-of-way. Inspections of Applicant's facilities may be
conducted for the purpose of determining whether facilities attached to SWBT's
poles or placed in SWBT's conduit system are in compliance with the terms of
this Agreement and conform to licenses subject to this Agreement. Charges for
inspections shall be allocated among all parties benefiting from the inspection
in accordance with the Pole Attachment Act and applicable rules, regulations,
and commission orders. When an inspection is conducted for the specific purpose
of auditing or investigating Applicant's compliance with this Agreement, SWBT
may charge Applicant for inspection expenses only if the inspection reflects
that Applicant is in substantial noncompliance with the terms of this Agreement.
If the inspection reflects that Applicant's facilities are not in compliance
with the terms of this Agreement, Applicant shall bring its facilities into
compliance promptly after being notified of such noncompliance and shall notify
SWBT in writing when the facilities have been brought into compliance.

        16.02 Report of Inspection Results. SWBT will provide Applicant the
results of any inspection of Applicant's facilities performed under Section
16.01 of this Agreement.

        16.03 Post-installation Inspections. This article does not apply to
post-installation inspections performed as part of a pre-license survey in those
cases when Applicant has occupied space on or in SWBT's poles, ducts, conduits,
or rights-of-way prior to the issuance of a license pursuant to Section 8.03 of
this Agreement.

                      ARTICLE 17: TAGGING OF FACILITIES AND
                            UNAUTHORIZED ATTACHMENTS

        17.01 Facilities to Be Marked. Applicant shall tag or otherwise mark all
of Applicant's facilities placed on or in SWBT's poles, ducts, conduits, and
rights-of-way in a manner sufficient to identify the facilities as Applicant's
facilities.

        17.02 Removal of Untagged Facilities. Subject to the provisions of
subsections (a)-(d) of this section, SWBT may, without notice to any person or
entity, remove from SWBT's poles or any part of SWBT's conduit system any
untagged or unmarked facilities, including any such facilities owned or used by
Applicant, if SWBT determines 

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<PAGE>   351

that such facilities are not the subject of a current license authorizing their
continued attachment to SWBT's poles or occupancy of SWBT's conduit system and
are not otherwise lawfully present on SWBT's poles or in SWBT's conduit system.

                (a) Before removing any such untagged or unmarked facilities,
                    SWBT shall first attempt to determine whether the facilities
                    are being used by Applicant or any other firm, are
                    authorized by any license subject to this Agreement, or are
                    otherwise lawfully present on SWBT's poles or in SWBT's
                    conduit system.

                (b) SWBT shall not remove untagged or unmarked facilities which
                    are thought to be operational without first making
                    reasonable efforts to (1) determine the identity of the
                    owner or other person or entity thought to be responsible
                    for the facilities and (2) give advance written notice to
                    such person or entity.

                (c) If the facilities appear to be facilities of Applicant
                    described in a current license or application subject to
                    this Agreement, SWBT shall give written notice to Applicant
                    requesting Applicant to tag or mark the facilities within 60
                    days and Applicant shall either tag the facilities within
                    the 60-day period, advise SWBT in writing of its schedule
                    for tagging the facilities, or notify SWBT in writing that
                    it disclaims ownership of or responsibility for the
                    facilities. If Applicant disclaims ownership of or
                    responsibility for the facilities, Applicant shall disclose
                    to SWBT the identity of the owner or other person or entity,
                    if any, thought by Applicant to be responsible for the
                    facilities.

                (d) If the facilities appear to be facilities used by Applicant
                    but not subject to a current license granted under this
                    Agreement, the provisions of Sections 17.05-17.12 shall
                    apply.

        17.03 Verification That Presently Attached Facilities Are Subject to
Existing Licenses. Applicant warrants and represents that, to the best of its
information and belief, all facilities presently owned or used by Applicant and
attached to SWBT's poles or occupying space within any part of SWBT's conduit
system in this State have been disclosed to SWBT and are subject to current
licenses or are otherwise lawfully present on or in SWBT's poles, ducts, and
conduits. If Applicant determines that any such facilities are not the subject
of current licenses, Applicant shall so advise SWBT and promptly apply for
licenses for such facilities or remove the facilities from SWBT's poles or
conduits. Nothing contained in this section shall be construed as requiring
Applicant to make a field audit of its existing facilities to confirm the
licensing status of its facilities as a prerequisite to entering into this
Agreement.

        17.04 Updating of Plant Location Records. Applicant shall furnish SWBT,
upon request, with such information as may from time to time be necessary for
SWBT to 

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correct and update SWBT's pole and conduit maps and records, cable plat
maps, and other plant location records recording or logging assignments of pole,
duct, and conduit space.

        17.05 Notice to Applicant. If any of Applicant's facilities for which no
license is presently in effect are found attached to SWBT's poles or anchors or
within any part of SWBT's conduit system, SWBT, without prejudice to other
rights or remedies available to SWBT under this Agreement, and without prejudice
to any rights or remedies which may exist independent of this Agreement, shall
send a written notice to Applicant advising Applicant that no license is
presently in effect with respect to the facilities and that Applicant must,
within 60 days, respond to the notice as provided in Section 17.06 of this
Agreement.

        17.06 Applicant's Response. Within 60 days after receiving a notice
under Section 17.05 of this Agreement, Applicant shall acknowledge receipt of
the notice and submit to SWBT, in writing, either:

                (a) a denial or disclaimer of ownership or other interest in the
                    facilities, together with an explanation of the factual and
                    claimed legal basis for such denial or disclaimer;

                (b) a statement that the facilities are the subject of a current
                    license, together with an explanation of the factual and
                    claimed legal basis for Applicant's assertion that the
                    facilities are currently licensed, or a statement that no
                    license is required, and an explanation of the factual and
                    claimed legal basis for that assertion; or

                (c) an application for a new or amended license with respect to
                    such facilities, together with a full and complete
                    explanation of the circumstances under which such facilities
                    were attached to, placed within, or allowed to remain on or
                    in SWBT's poles or any part of SWBT's conduit system. Such
                    explanation shall include, at a minimum, the following:

                    (1)  the date (or estimated date) when such facilities were
                         attached to SWBT's poles or placed in SWBT's conduit
                         system, and the factual basis supporting Applicant's
                         selection of such date (or estimated date); and

                    (2)  the factual basis for Applicant's assertion, if any,
                         that decisions to attach, place or allow the facilities
                         to remain on or in SWBT's poles or conduit system were
                         made in good faith and without intent to circumvent
                         SWBT's pole attachment or conduit occupancy licensing
                         requirements.

                                    PAGE 68
<PAGE>   353

        17.07 Denial or Disclaimer of Ownership or Other Interest. Applicant's
submission to SWBT of a denial or disclaimer of ownership or other interest in
the facilities shall constitute Applicant's waiver of any objection Applicant
may have to SWBT's removal of the facilities. Submission of such a denial or
disclaimer shall not be construed as an agreement by Applicant to pay any
charges associated with removal of the facilities and shall be deemed to be a
denial of any such responsibility; provided, however, that nothing contained in
this section shall prohibit SWBT from invoking the dispute resolution process or
filing suit, in a court of competent jurisdiction, to establish that Applicant
is liable to SWBT for the costs of removal notwithstanding its denial or
disclaimer.

        17.08 Review by SWBT of Licensing Status. Within 15 business days after
receiving Applicant's statement that the facilities are the subject of a current
license or that no license is required, SWBT shall review Applicant's
explanation of the factual and claimed legal basis for Applicant's assertions
and shall advise Applicant, in writing, whether it agrees or disagrees with
Applicant's assertions. If SWBT agrees with Applicant's assertions, the parties
may amend the applicable license and no further action shall be required of
Applicant. If SWBT does not accept Applicant's position, Applicant shall, within
15 business days, apply for a new or amended license as provided by Section
17.06(c) of this Agreement.

        17.09 Approval of License and Retroactive Charges. If SWBT approves
Applicant's application for a new or amended license, Applicant shall be liable
to SWBT for all fees and charges associated with the unauthorized attachments as
specified in Section 17.10 of this Agreement. The issuance of a new or amended
license as provided by this article shall not operate retroactively or
constitute a waiver by SWBT of any of its rights or privileges under this
Agreement or otherwise.

        17.10 Fees and Charges. This section applies to fees and charges with
respect to Applicant's facilities placed on or in SWBT pole, duct, or conduit
space which has not been assigned to Applicant. Applicant shall be liable to
SWBT for all fees and charges associated with any such unauthorized pole
attachments or conduit occupancy for which it is responsible. Attachment and
occupancy fees and charges shall continue to accrue until the unauthorized
facilities are removed from SWBT's poles or conduit system and shall include,
but not be limited to, all fees and charges which would have been due and
payable if Applicant and its predecessors had continuously complied with all
applicable SWBT licensing requirements. Such fees and charges shall be due and
payable 30 days after the date of the bill or invoice stating such fees and
charges. The parties shall engage in good faith discussions to reach a mutually
agreed determination as to the amount due and owing. In some cases, it may be
impractical, unduly difficult, or uneconomical to determine the actual amount of
fees which would have been due and payable if all licensing requirements had
been met. Therefore, if the parties, through good faith discussions fail to
reach agreement on the amount due and owing, and if the amount due and owing
cannot be determined due to Applicant's inability to provide the information
required to determine the correct amount, the amount owing with respect to each

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<PAGE>   354

unauthorized attachment or occupancy shall be equal to three times the annual
attachment and occupancy fees in effect on the date Applicant is notified by
SWBT of the unauthorized attachment or occupancy. Payment of such fees shall be
deemed liquidated damages and not a penalty. In addition, Applicant shall
rearrange or remove its unauthorized facilities at SWBT's request to comply with
applicable placement standards, shall remove its facilities from any space
occupied by or assigned to SWBT or another joint user, and shall pay SWBT for
all costs incurred by SWBT in connection with any facilities rearrangements,
modifications, or replacements necessitated as a result of the presence of
Applicant's unauthorized facilities.

        17.11 Removal of Unauthorized Attachments. If Applicant does not apply
for a new or amended pole attachment license with respect to unauthorized
facilities within the specified period of time, or if such application is
received and specifically disapproved, SWBT shall by written notice request to
Applicant to remove its unauthorized facilities not less than 60 days from the
date of notice and Applicant shall remove the facilities within the time
specified in the notice; provided, however, that SWBT may request Applicant to
remove such facilities at an earlier date if such earlier removal is necessary
for reasons beyond SWBT's control. If the facilities have not been removed
within the time specified in the notice, SWBT may, at SWBT's option, remove
Applicant's facilities at Applicant's expense.

        17.12 No Ratification of Unlicensed Attachments or Unauthorized Use of
SWBT's Facilities. No act or failure to act by SWBT with regard to any
unlicensed attachment or occupancy or unauthorized use of SWBT's facilities
shall be deemed to constitute a ratification by SWBT of the unlicensed
attachment or occupancy or unauthorized use, nor shall the payment by Applicant
of fees and charges for unauthorized pole attachments or conduit occupancy
exonerate Applicant from civil or criminal liability for any deliberate trespass
or other illegal or wrongful conduct in connection with the placement or use of
such unauthorized facilities.

                  ARTICLE 18: REMOVAL OF APPLICANT'S FACILITIES

        18.01 Responsibility for Removing Facilities. Applicant shall be
responsible for and shall bear all expenses arising out of or in connection with
the removal of its facilities from SWBT's poles, ducts, conduits, and
rights-of-way. Such removals shall be performed in accordance with the
provisions of this article.

                (a) When practicable, Applicant shall give SWBT at least 30
                    days' advance notice in writing of its intent to remove
                    facilities from any part of SWBT's conduit system and the
                    proposed method of removal. The notice shall include the
                    locations of the facilities to be removed, the name and
                    telephone number of the manager responsible for removal of
                    the facilities, and the estimated dates when removal of the
                    facilities will begin and end.

                                    PAGE 70
<PAGE>   355

                (b) Applicant shall, if requested by SWBT to do so, place a pull
                    mandrel (slug) through all or any specified part of the duct
                    which was occupied by Applicant.

                (c) Except as otherwise agreed upon in writing by the parties,
                    Applicant must, after removing its facilities, plug all
                    previously occupied ducts at the entrances to SWBT's
                    manholes (if SWBT would itself plug the ducts under the same
                    circumstances) in accordance with the standards set by SWBT
                    for its own operations, provided that such standards have
                    been communicated in writing to Applicant at least 60 days
                    in advance of the removal of Applicant's facilities.

                (d) Applicant shall be solely responsible for the removal of its
                    own facilities from SWBT's poles, ducts, conduits, and
                    rights-of-way and for (1) paying all persons and entities
                    which provide materials, labor, access to real or personal
                    property, or other goods or services in connection with the
                    removal of Applicant's facilities from SWBT's poles, ducts,
                    conduits, or rights-of-way and (2) directing the activities
                    of all such personnel while they are physically present on,
                    within, or in the vicinity of SWBT's poles, ducts, conduits,
                    or rights-of-way.

                (e) When Applicant no longer intends to occupy space on a SWBT
                    pole or in a SWBT duct or conduit, Applicant will provide
                    written notification to SWBT that it wishes to terminate the
                    license with respect to such space and will remove its
                    facilities from the space described in the notice. Upon
                    removal of Applicant's facilities, the license shall
                    terminate and the space shall be available for reassignment.

        18.02 Removal of Facilities Not in Active Use. At SWBT's request,
Applicant shall remove from SWBT's poles, ducts, conduits, and rights-of-way any
of Applicant's facilities which are no longer in active use; provided, however,
that Applicant shall not be required to remove such facilities when due cause
and justification exists for allowing them to remain in place. Applicant shall
not be required to remove retired or inactive (dead) cables that have been
overlashed by other facilities which remain in active use unless removal
expenses are paid by the person or entity requesting removal of such facilities.
Applicant shall not be required to remove cables that would require excavation
to remove unless the person or entity requesting removal of such cables bears
the expenses of such excavation in a manner analogous to the provisions of
Section 10.02(c) of this Agreement. Applicant shall not abandon any of its
facilities by leaving them on SWBT's poles, in SWBT's ducts, conduits, or
rights-of-way, at any location where they may block or obstruct access to SWBT's
poles or any part of SWBT's conduit system, or on any public or private property
(other than property owned or controlled by Applicant) in the vicinity of SWBT's
poles, ducts, conduits, or rights-of-way.

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<PAGE>   356

        18.03 Removal Following Termination of License. Applicant shall remove
its facilities from SWBT's poles, ducts, conduits, or rights-of-way within 60
days, or within such other period of time as shall be mutually agreeable to the
parties, after termination of the license authorizing the attachment of such
facilities to SWBT's poles or the placement of such facilities in SWBT's ducts,
conduits, or rights-of-way.

        18.04 Removal Following Replacement of Facilities. Applicant shall
remove facilities no longer in service from SWBT's poles or conduit system
within 60 days, or within such other period of time as shall be mutually
agreeable to the parties, after the date Applicant replaces existing facilities
on a pole or in a conduit with substitute facilities on the same pole or in the
same conduit; provided, however, that removal of facilities from the maintenance
duct shall be governed by Sections 12.04, 13.03, and 15.02 of this Agreement and
not by this section.

        18.05 Removal to Avoid Forfeiture. If the presence of Applicant's
facilities on SWBT's poles or in SWBT's ducts, conduits, or rights-of-way would
cause a forfeiture of the rights of SWBT to occupy the property where such pole,
duct, conduit, or right-of-way is located, SWBT will promptly notify Applicant
in writing and Applicant shall not, without due cause and justification, refuse
to remove its facilities within such time as may be required to prevent such
forfeiture. SWBT will give Applicant not less than 60 days from the date of
notice to remove Applicant's facilities unless prior removal is required to
prevent the forfeiture of SWBT's rights. At Applicant's request, the parties
will engage in good faith negotiations with each other, with joint users, and
with third-party property owners and cooperatively take such other steps as may
be necessary to avoid the unnecessary removal of Applicant's facilities in the
face of a threatened forfeiture.

        18.06 Notice of Completion of Removal Activities. Applicant shall give
written notice to SWBT stating the date on which the removal of its facilities
from SWBT's poles, ducts, conduits, and rights-of-way has been completed.
Charges shall continue to accrue with respect to such facilities until
Applicant's facilities have been removed, pull mandrels (slugs) have been pulled
if required by Section 18.01(b) of this Agreement, Applicant has plugged all
previously occupied ducts at the entrances to SWBT's manholes as required by
Section 18.01(c) of this Agreement, and the notice required by this section has
been given.

        18.07 Removal of Facilities by SWBT; Notice of Intent to Remove. If
Applicant fails to remove its facilities from SWBT's poles, ducts, or conduits
in accordance with the provisions of Sections 18.01-18.06 of this Agreement,
SWBT may remove such facilities and store them at Applicant's expense in a
public warehouse or elsewhere without being deemed guilty of trespass or
conversion and without becoming liable to Applicant for any injury, loss, or
damage resulting from such actions. SWBT shall give Applicant not less than 60
days prior written notice of its intent to remove Applicant's facilities
pursuant to this section. The notice shall state:


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                (a) the date when SWBT plans to commence removal of Applicant's
                    facilities, and that Applicant may remove the facilities at
                    Applicant's sole cost and expense at any time before the
                    date specified;

                (b) SWBT's plans with respect to disposition of the facilities
                    removed; and

                (c) that Applicant's failure to remove the facilities or make
                    alternative arrangements with SWBT for removal and
                    disposition of the facilities shall constitute an
                    abandonment of the facilities and of any interest therein.

        18.08 Removal of Facilities by SWBT. If SWBT removes any of Applicant's
facilities pursuant to this article, Applicant shall reimburse SWBT for SWBT's
costs in connection with the removal, storage, delivery, or other disposition of
the removed facilities.

        18.09 Reattachment or Subsequent Attachment Following Removal. After
Applicant's facilities have been properly removed pursuant to the provisions of
this article, neither the removed facilities nor replacement facilities shall be
attached to SWBT's poles or placed in SWBT's conduit system until Applicant has
first submitted new applications for the facilities and complied with the
provisions of this Agreement.

                  ARTICLE 19: RATES, FEES, CHARGES, AND BILLING

        19.01 Rates, Charges and Fees Subject to Applicable Laws, Regulations,
Rules, and Commission Orders. All rates, charges and fees set forth in this
Agreement, including rates, charges and fees set forth in APPENDIX I (Schedule
of Rates, Fees, and Charges), shall be subject to all applicable federal and
state laws, rules, regulations, and commission orders, including but not limited
to (a) the Pole Attachment Act and rules, regulations, and commission orders
issued thereunder and (b) applicable orders of the State Commission in
interconnection arbitration proceedings.

        19.02 Schedule of Rates, Fees, and Charges. SWBT's current schedule of
rates, fees, and charges is attached to this Agreement as APPENDIX I and
incorporated herein as an integral part of this Agreement.

        19.03 Pole Attachment and Conduit Occupancy Fees. Until such time as the
FCC authorizes the charging of different rates to cable television systems and
telecommunications carriers, SWBT's annual rates for access to poles, ducts,
conduits, and rights-of-way shall be the same for cable television systems and
telecommunications carriers. For all attachments to SWBT's poles and occupancy
of SWBT's ducts and conduits, Applicant will pay SWBT's semiannual pole
attachment and conduit occupancy fees as specified in APPENDIX I. Pole
attachment and conduit occupancy fees shall be assessed and billed with respect
to (a) occupied space whether or not subject to a current license and (b)
assigned space as well as occupied space. Fees for pole attachments shall 


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be based on the number of Applicant's pole attachments as of the date of billing
by SWBT and shall be calculated in accordance with applicable FCC rules,
regulations, and orders. Fees for conduit occupancy shall be based on the number
of duct feet occupied by or assigned to Applicant as of the date of billing by
SWBT and shall be calculated in accordance with applicable FCC rules,
regulations, and orders.

        19.04 Billing for and Payment of Pole Attachment and Conduit Occupancy
Fees. Pole Attachment and conduit occupancy fees under this Agreement and
licenses subject to this Agreement shall be payable semiannually in advance.

                (a) Bills shall be submitted to Applicant for two semiannual
                    billing periods, the first period including charges for the
                    months of January through June and the second including
                    charges for the months of July through December.

                (b) Charges associated with newly licensed pole attachments and
                    conduit occupancy shall be prorated on a daily basis and
                    billed with the next semiannual bill.

                (c) Charges shall be adjusted and retroactively prorated on a
                    daily basis following the removal of Applicant's facilities
                    and shall be retroactively adjusted as a credit on the next
                    semiannual bill.

        19.05 Application Fees. SWBT does not currently charge application fees
in connection with requests for access to poles, ducts, conduits, and
rights-of-way. SWBT does, however, impose charges, on a case-by case basis, for
work performed in processing applications for access and preparing SWBT's poles,
ducts, conduits, and rights-of-way to accommodate the facilities of parties
seeking access.

        19.06 Charges for Pre-license Survey Work. Subject to applicable
commission orders, Applicant will pay SWBT's charges for pre-license survey work
associated with the processing of Applicant's request for access. SWBT's
pre-license survey charges are not set on a fixed fee basis and will vary from
case-to-case depending on such factors as the number and location of the poles,
ducts, conduits, and rights-of-way subject to Applicant's access request, the
completeness and quality of information submitted by the Applicant in its
application, the nature of the facilities to be placed by Applicant, and the
nature and extent of facilities modification, capacity expansion, and make-ready
work proposed by Applicant.

        19.07 Charges for Facilities Modifications, Capacity Expansions, and
Make-ready Work. Subject to applicable commission orders, Applicant will pay
SWBT's charges for facilities modification, capacity expansion, and make-ready
work performed by SWBT, or by persons acting on SWBT's behalf, as provided in
other provisions of this Agreement and APPENDIX I.

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        19.08 Contract Administration Fee. Subject to applicable commission
orders, SWBT may charge Applicant a one-time contract administration as provided
in APPENDIX I. This fee, if applicable, shall be assessed for work performed in
the initial processing of this Agreement and shall be non-refundable upon
acceptance of this Agreement by SWBT.

        19.09 Administrative Record-keeping Fees. Subject to applicable
commission orders, SWBT may charge Applicant cost-based administrative
record-keeping fees (e.g., fees associated with records and billing changes
resulting from the sale, consolidation, or other transfer of Applicant's
business or facilities, name changes, and the like) as provided in APPENDIX I.

        19.10 Charges for Work Performed by SWBT Employees. Except as otherwise
specifically required by applicable commission orders, SWBT's charges to
Applicant for worked performed by SWBT employees pursuant to this Agreement
shall be computed by multiplying the fully loaded hourly rates for such
employees times the number of hours required to perform the work. Disputes over
SWBT's charges for work performed by SWBT employees, including disputes between
the parties concerning the number of hours required to perform the work, shall
be subject to the dispute resolution procedures of Article 30. Notwithstanding
the execution of this Agreement, Applicant shall have the right to challenge the
methodology utilized by SWBT to determine hourly rates for SWBT employees at any
time in any forum having jurisdiction over the subject matter.

        19.11 Due Date for Payment, Interest on Past Due Invoices, Remedies for
Non-payment, and Procedures for Disputing Charges. For fees and charges other
than charges for make-ready work, each bill or invoice submitted by SWBT to
Applicant shall state the date that payment is due, which date shall be not less
than 60 days after the date of the bill or invoice. Applicant will pay each such
bill or invoice on or before the stated due date. For make-ready work, the
payment due date shall be not less than 30 days after the date of the bill or
invoice.

                (a) Interest on past due bills and invoices shall accrue at the
                    rate of 12% per annum, or the maximum rate allowed by law,
                    whichever is less.

                (b) Applicant's failure to pay SWBT's fees and charges shall be
                    grounds for terminating this Agreement and licenses subject
                    to this Agreement.

                (c) If Applicant fails to pay, when due, any fees or charges
                    billed to Applicant under this Agreement, and any portion of
                    such fees or charges remains unpaid more that 15 calendar
                    days after the due date, SWBT may send Applicant a written
                    notice advising Applicant that this Agreement, or specified
                    licenses subject to this Agreement, may be terminated if
                    such fees or charges are not paid within 15 calendar days
                    after the date of the notice. Applicant must remit to SWBT
                    all such unpaid fees or charges, whether disputed or
                    undisputed, within 15 days 


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                    after the date of the notice. If Applicant pays disputed
                    fees under protest, and it is later determined that such
                    fees or any portion thereof should be refunded, the portion
                    of fees to be refunded shall be refunded with interest at
                    the rate of 12% per annum or the maximum rate allowed by
                    law, whichever is less.

                (d) Applicant may dispute any fees or charges billed by SWBT to
                    Applicant under this Agreement by invoking the dispute
                    resolution procedures set forth in Article 30 of this
                    Agreement.

                (e) If Applicant does not dispute such fees or charges and any
                    portion of such undisputed fees or charges remains unpaid 30
                    calendar days after the date of the notice, SWBT may, to the
                    extent permitted by the Pole Attachment Act and applicable
                    rules, regulations, and commission orders, terminate this
                    Agreement and licenses subject to this Agreement, suspend
                    the processing of pending applications for access to SWBT's
                    poles, ducts, conduits, and rights-of-way located in this
                    State, and refuse to accept further applications for access
                    until such undisputed fees or charges, together with accrued
                    interest thereon, have been paid in full.

        19.12 Modification of Rates, Fees and Charges. Subject to applicable
federal and state laws, rules, regulations, and commission orders, SWBT shall
have the right to modify all rates, charges and fees set forth in this
Agreement, including but not limited to those listed in APPENDIX I, as provided
in this section.

                (a) Upon written notice to Applicant, SWBT may change, on a
                    going-forward basis, the amounts of any rates, fees or
                    charges assessed under this Agreement. Pole attachment and
                    conduit occupancy rates shall not be increased more than
                    once annually.

                    (1)  The notice shall state the effective date of the
                         changes, which, in the event of a rate increase, shall
                         be no earlier than the 60th day after the notice is
                         given.

                    (2)  The changes shall be effective on the effective date
                         stated in the notice unless stayed or prohibited by a
                         court or agency of competent jurisdiction.

                    (3)  The changes shall be reflected on the first semiannual
                         bill issued on or after the effective date specified in
                         the notice.

                (b) If the rates, fees and charges set forth in the notice are
                    not acceptable to Applicant, Applicant may, notwithstanding
                    any other provisions of this Agreement, at Applicant's
                    option (1) seek the renegotiation of this Agreement, (2)
                    terminate this Agreement, or (3) seek relief through the


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                    dispute resolution process or before a court or agency of
                    competent jurisdiction.

        19.13 Disputes Over Charging Methodologies. The parties acknowledge that
the Pole Attachment Act grants the FCC regulatory authority over the rates,
terms, and conditions of access to poles, ducts, conduits, and rights-of-way.
The parties further acknowledge that, as of the date of this Agreement, this
State has not elected to assume reverse preemptive regulatory authority over
such rates, terms, and conditions by certifying to the FCC that it has made such
election. Accordingly, complaints concerning and challenges to SWBT's charging
methodologies shall be brought, in the first instance, before the FCC in
accordance with FCC procedural rules unless this State elects to preempt FCC
regulation of pole attachment rates, terms, and conditions of access; provided,
however, that nothing contained in this section shall be construed as affecting
the right of either party to seek relief from any court or agency of competent
jurisdiction in connection with the negotiation, arbitration, and approval of
interconnection agreements under 47 U.S.C. Section 252.

                    ARTICLE 20: PERFORMANCE AND PAYMENT BONDS

        20.01 Bond May Be Required. SWBT may require Applicant, authorized
contractors, and other persons acting on Applicant's behalf to execute
performance and payment bonds (or provide other forms of security) in amounts
and on terms sufficient to guarantee the performance of their respective
obligations arising out of or in connection with this Agreement only as provided
in subsections (a)-(b) of this section and Section 20.02. Bonds shall not be
required for entities meeting all self-insurance requirements of Section 23.02
of this Agreement.

                (a) If Applicant elects to perform make-ready or facilities
                    modification work under Section 6.08(c) or Sections
                    10.02-10.05 of this Agreement, SWBT may require Applicant,
                    authorized contractors, and other persons acting on
                    Applicant's behalf to execute bonds equivalent to those
                    which would be required by SWBT if the work had been
                    performed by contractors, subcontractors, or other persons
                    selected directly by SWBT. No bonds shall be required of
                    Applicant, authorized contractors, or other persons acting
                    on Applicant's behalf except in those situations where a
                    bond would be required if the work were being performed on
                    SWBT's behalf.

                (b) No other bond shall be required of Applicant to secure
                    obligations arising under this Agreement in the absence of
                    due cause and justification.

                (c) If a bond or similar form of assurance is required of
                    Applicant, an authorized contractor, or other person acting
                    on Applicant's behalf, Applicant shall promptly submit to
                    SWBT, upon request, adequate proof that the bond remains in
                    full force and effect and provide certification 


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                    from the company issuing the bond that the bond will not be
                    cancelled, changed or materially altered without first
                    providing SWBT 60 days written notice.

                (d) SWBT may communicate directly with the issuer of any bond
                    required by SWBT pursuant to this section to verify the
                    terms of the bond, to confirm that the bond remains in
                    force, and to make demand on the issuer for payment or
                    performance of any obligations secured by the bond.

        20.02 Payment and Performance Bonds in Favor of Contractors and
Subcontractors. Applicant shall be responsible for paying all employees,
contractors, subcontractors, mechanics, materialmen and other persons or
entities performing work or providing materials in connection with (a) the
performance of facilities modification, capacity expansion, or make-ready work
by Applicant, authorized contractors, or other persons acting on Applicant's
behalf under Sections 6.08(c) and 10.02-10.05 of this Agreement or (b) the
construction, attachment, use, inspection, maintenance, repair, rearrangement,
modification, and removal of any of Applicant's facilities attached or to be
attached to SWBT's poles or placed or to be placed within SWBT's ducts,
conduits, or rights-of-way. In the event any claim or demand is made on SWBT by
any such employee, contractor, subcontractor, mechanic, materialman, or other
person or entity providing such materials or performing such work, SWBT may
require, in addition to any security provided under Section 20.01 of this
Agreement, that Applicant execute payment or performance bonds, or provide such
other security, as SWBT may deem reasonable or necessary to protect SWBT from
any such claim or demand.

                           ARTICLE 21: INDEMNIFICATION

        21.01 Risks Associated with Outside Plant Operations. The parties
acknowledge that SWBT's outside plant facilities include thousands of miles of
pole lines, conduits, and rights-of-way located on public and private property
throughout SWBT's service area, that SWBT cannot control or continuously monitor
activities that occur at these sites, and that the risks associated with outside
plant operations and facilities are not similar to the risks associated with
operations occurring inside SWBT's central offices and other secure SWBT
buildings and structures. The parties further acknowledge that the presence of
multiple firms on or in poles, ducts, conduits, and rights-of-way owned or
controlled by SWBT requires that liability risks be fairly allocated between the
parties and that it is the parties' intent to allocate such risks in a just,
reasonable, and nondiscriminatory manner which addresses known risks associated
with the outside plant environment and activities and conditions at outside
plant locations.

        21.02 Control of Premises. Applicant acknowledges that its employees and
other persons acting on Applicant's behalf, and employees of joint users and
other persons acting on behalf of joint users, will be present, without
supervision or control by SWBT, and in many cases without SWBT's knowledge, on,
within, and in the vicinity of 

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SWBT's poles, ducts, conduits, and rights-of-way. During those times when
Applicant's employees and personnel are present at such sites, Applicant shall
be deemed, for the purpose of allocating liabilities between the parties, to be
an independent contractor in control of the premises except as otherwise
provided in this section. Although SWBT inspectors may be present at the site of
work being performed by Applicant or persons acting on Applicant's behalf, such
inspectors shall have no authority to direct Applicant or personnel acting on
Applicant's behalf concerning the method or manner by which the work is to be
performed, and the presence of a SWBT inspector shall not result in SWBT's being
deemed to be in control of the premises. When both parties are present and
performing work operations at a site subject to this section, SWBT and Applicant
shall be deemed to be jointly in control of the premises. When poles, ducts,
conduits, or rights-of-way occupy property owned by third parties, neither party
shall be deemed to be in control of the premises, except as otherwise provided
by law, at times when such party's work operations are not in progress. Work
operations shall be considered to be in progress from the time work commences
until such work is completed whether or not employees of a party or persons
acting on such party's behalf are actually present at the site.

        21.03 INDEMNITY AGAINST AND LIMITATIONS OF LIABILITY WITH RESPECT TO
CERTAIN NEGLIGENT ACTS AND OMISSIONS. THIS ARTICLE INCLUDES PROVISIONS
INDEMNIFYING EACH PARTY FROM LIABILITIES ARISING OUT OF OR IN CONNECTION WITH
CERTAIN NEGLIGENT ACTS AND OMISSIONS OF SUCH PARTY. THIS ARTICLE ALSO INCLUDES
PROVISIONS LIMITING THE LIABILITIES OF EACH PARTY ARISING OUT OF OR IN
CONNECTION WITH CERTAIN NEGLIGENT ACTS AND OMISSIONS OF SUCH PARTY.

        21.04 Indemnities Excluded. Except as otherwise specifically provided in
this article, neither party (as an "indemnifying party") shall be required to
indemnify or defend the other party (as an "indemnified party") against, or hold
the indemnified party harmless from, any suit, claim, demand, loss, damage,
liability, fine, penalty, or expense arising out of:

                (a) any breach by the indemnified party of any provision of this
                    Agreement or any breach by the indemnified party of the
                    parties' interconnection agreement, if any;

                (b) the violation of any law by any employee of the indemnified
                    party or other person acting on the indemnified party's
                    behalf;

                (c) willful or intentional misconduct or gross negligence
                    committed by any employee of the indemnified party or by any
                    other person acting on the indemnified party's behalf; or

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                (d) any negligent act or acts committed by any employee of the
                    indemnified party or other person acting on the indemnified
                    party's behalf, if such negligent act or acts are the sole
                    producing cause of the injury, loss, or damage giving rise
                    to the suit, claim, demand, loss, damage, liability, fine,
                    penalty, or expense for which indemnity is requested.

        21.05 Workplace Injuries. The parties acknowledge that injuries may
occur at sites where work is being performed by or for either party and that
primary responsibility for preventing workplace injuries shall be placed on the
party controlling work operations at the site. Workplace injuries may result
from any of variety of causes, including but not limited to electrocution
associated with contact with electric power lines on poles or use of defective
equipment, falls from poles resulting from the negligence of the injured person
or co-workers or due to the existence of unsafe conditions on or in the vicinity
of the pole, cave-ins and other accidents at excavation sites, explosion of
combustible gases within or in the vicinity of a conduit system, exposure to
hazardous substances or noxious gases at the site, acts of God, and acts and
omissions of third parties over whom neither party has control. Except as
expressly provided in this Agreement to the contrary, each party shall
indemnify, on request defend, and hold the other party harmless from any and all
suits, claims, demands, losses, damages, liabilities, fines, penalties, or
expenses of every kind and character, on account of or in connection with any
injury, loss, or damage suffered by any person, which arises out of or in
connection with the personal injury or death of any employee of the indemnifying
party (or other person acting on the indemnifying party's behalf) if such injury
or death results, in whole or in part, from any occurrence or condition on,
within, or in the vicinity of SWBT's poles, ducts, conduits, and rights-of-way;
provided, however, that Applicant's indemnification duties under this section
shall arise only if the person injured is present at such site in connection
with the performance or anticipated performance of any act required or permitted
to be performed by Applicant or by persons acting on Applicant's behalf pursuant
to this Agreement. Indemnities provided by this section shall be subject to the
exclusions set forth in Section 21.04 and include but are not limited to
indemnities arising out of or in connection with claims arising from or in any
way connected with any injury, sickness, disease, or death of any employee of
the indemnifying party or any person acting on the indemnifying party's behalf
attributable or allegedly attributable to occurrences or conditions on, within,
or in the vicinity of SWBT's poles, ducts, conduits, and rights-of-way. EXCEPT
AS PROVIDED ABOVE IN SUBSECTIONS 21.04(c)-(d), THE INDEMNIFYING PARTY'S
INDEMNIFICATION OBLIGATIONS UNDER THIS SECTION SHALL ARISE EVEN IF THE INJURY,
SICKNESS, DISEASE, OR DEATH WAS ATTRIBUTABLE IN PART TO NEGLIGENT ACTS OR
OMISSIONS OF THE INDEMNIFIED PARTY.

        21.06 Other Claims Brought Against Either Party by Employees and Other
Persons Acting on the Other Party's Behalf. Nothing contained in this Agreement
shall create any contractual liability or other liability on the part of either
party to any employee, contractor, or subcontractor of the other party or any
other person acting on the other party's behalf. Each party shall indemnify, on
request defend, and hold the other 

                                    PAGE 80
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party harmless from any and all suits, claims, demands, losses, damages,
liabilities, or expenses of every kind and character (other than workplace
injury claims subject to Section 21.05 above) made, brought, or sought against
the indemnified party by any employee, contractor, or subcontractor of the
indemnifying party or by any other person acting on the indemnifying party's
behalf; provided, however, that this section shall apply only to suits, claims,
demands, losses, damages, liabilities, or expenses related to the subject matter
of this Agreement. Indemnities provided by this section shall be subject to the
exclusions set forth in Section 21.04 and include but are not limited to
indemnities arising out of or in connection with claims arising from or in any
way connected with the employment relationship or other claimed relationship
between the indemnifying party and the employee, contractor, subcontractor, or
other person acting on the indemnifying party's behalf; claims arising out of
disputes over payments due or allegedly due to any employee, contractor,
subcontractor, or other person acting on the indemnifying party's behalf; and
claims arising out of other contract disputes between the indemnifying party and
the employee, contractor, subcontractor, or other person acting on the
indemnifying party's behalf. EXCEPT AS PROVIDED ABOVE IN SUBSECTIONS
21.04(c)-(d), THE INDEMNIFYING PARTY'S INDEMNIFICATION OBLIGATIONS UNDER THIS
SECTION SHALL ARISE EVEN IF THE INJURY, LOSS, OR DAMAGE GIVING RISE TO THE
INDEMNIFICATION CLAIM WAS ATTRIBUTABLE IN PART TO NEGLIGENT ACTS OR OMISSIONS OF
THE INDEMNIFIED PARTY.

        21.07 Claims Brought Against Either Party by Vendors, Suppliers,
Customers, and other Persons in Privity of Contract with the Other Party. The
parties acknowledge that neither party controls the contractual relationships
between the other party and vendors, suppliers, customers, and other persons in
privity of contract with the other party and that nothing contained in this
Agreement shall create any contractual or other liability of either party to any
vendor, supplier, customer, or other person or entity in privity of contract
with the other party. Each party shall indemnify, on request defend, and hold
the other party harmless from any and all suits, claims, demands, losses,
damages, liabilities, or expenses of every kind and character, made, brought, or
sought against the indemnified party by any vendor, supplier, or customer of the
indemnifying party or by any other person or entity in privity with the
indemnifying party; provided, however, that this section shall apply only to
suits, claims, demands, losses, damages, liabilities, or expenses related to the
subject matter of this Agreement or Applicant's use of SWBT's poles, ducts,
conduits, or rights-of-way. The indemnifying party may not, as a defense to any
obligations of the indemnifying party under this section, assert that the
indemnified party's claims against the indemnifying party are barred by any
tariff or contract limitation of liability applicable to the indemnifying
party's vendor, supplier, or customer or to such other person in privity of
contract with the indemnifying party. Indemnities provided by this section shall
be subject to the exclusions set forth in Section 21.04 and include but are not
limited to indemnities for claims against either party arising out of or in
connection with the failure by the other party to meet its obligations
(including but not limited to contract and tariff obligations) to such other
party's customers and suppliers. EXCEPT AS PROVIDED ABOVE IN SUBSECTIONS
21.04(c)-(d), THE INDEMNIFYING PARTY'S INDEMNIFICATION OBLIGATIONS UNDER THIS


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SECTION SHALL ARISE EVEN IF THE INJURY, LOSS, OR DAMAGE GIVING RISE TO THE
INDEMNIFICATION CLAIM WAS ATTRIBUTABLE IN PART TO NEGLIGENT ACTS OR OMISSIONS OF
THE INDEMNIFIED PARTY.

        21.08 Claims Brought Against Either Party by Such Party's Own Employees,
Contractors, Subcontractors, or Other Persons Acting on Such Party's Behalf, and
Claims Brought Against Either Party by Such Party's Own Vendors, Suppliers,
Customers, or Other Persons in Privity of Contract with Such Party. Neither
party shall be entitled to indemnity, contribution, or subrogation from or by
the other party with respect to any suits, claims, demands, losses, damages,
liabilities, or expenses, of any kind or character, made, brought, or sought
against such party by any employee, contractor, or subcontractor of such party,
by any other person acting on behalf of such party, by any vendor, supplier, or
customer of such party, or by any other person or entity in privity of contract
with such party, if such suit, claim, demand, loss, damage, liability, or
expense arises directly out of or in connection with the subject matter of this
Agreement or the use by Applicant of SWBT's poles, ducts, conduits, or
rights-of-way. Indemnities excluded by this section include, but are not limited
to, indemnities for claims against either party arising out of or in connection
with employment-related disputes between either party and its employees; claims
against either party by contractors, subcontractors, and suppliers performing
work or supplying materials to SWBT sites at the request of such party; and
other failures by either party to meet its obligations (including but not
limited to contract and tariff obligations) to such party's own customers and
suppliers. THE INDEMNIFICATION EXCLUSIONS OF THIS SECTION SHALL APPLY EVEN IF
THE INJURY, LOSS, OR DAMAGE GIVING RISE TO THE INDEMNIFICATION CLAIM WAS
ATTRIBUTABLE IN PART TO THE NEGLIGENT ACTS OR OMISSIONS OF THE INDEMNIFYING
PARTY BUT SHALL NOT APPLY IF THE INJURY, LOSS, OR DAMAGE GIVING RISE TO THE
INDEMNIFICATION CLAIM AROSE FROM WILLFUL OR INTENTIONAL MISCONDUCT OR GROSS
NEGLIGENCE COMMITTED BY ANY EMPLOYEE OF THE INDEMNIFYING PARTY OR ANY OTHER
PERSON ACTING ON THE INDEMNIFYING PARTY'S BEHALF OR AROSE FROM ANY NEGLIGENT ACT
OR ACTS COMMITTED BY ANY EMPLOYEE OF THE INDEMNIFYING PARTY OR OTHER PERSON
ACTING ON THE INDEMNIFYING PARTY'S BEHALF, IF SUCH NEGLIGENT ACT OR ACTS ARE THE
SOLE PRODUCING CAUSE OF THE INJURY, LOSS, OR DAMAGE GIVING RISE TO THE SUIT,
CLAIM, DEMAND, LOSS, DAMAGE, LIABILITY, FINE, PENALTY, OR EXPENSE FOR WHICH
INDEMNITY IS REQUESTED.

        21.09 Injuries to Third Parties and Third-party Property Owners
Resulting from the Parties' Conduct. Each party shall indemnify, on request
defend, and hold the other party harmless from any and all suits, claims,
demands, losses, damages, liabilities, fines, penalties, or expenses, of every
kind and character, on account of or in connection with the personal injury or
death of any third party or physical damage to real or personal property owned
by a third party, arising, in whole or in part, out of or in connection with the
conduct of employees of the indemnifying party or other persons acting on the

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indemnifying party's behalf while such employees or other persons are present
on, within, or in the vicinity of any SWBT pole, duct, conduit, or right-of-way
in connection with the performance or anticipated performance of any act
required or authorized to be performed pursuant to this Agreement. Indemnities
provided by this section shall be subject to the exclusions set forth in Section
21.04 and include but are not limited to indemnities arising out of or in
connection with personal injury, death, and property damage claims by third
parties based on willful or intentional misconduct and negligent acts and
omissions of the indemnifying party.

        21.10 Indemnification for Environmental Claims. The parties acknowledge
that hazardous substances may be present on, within, or in the vicinity of
SWBT's poles, ducts, conduits, or rights-of-way; that employees and other
persons acting on the parties' behalf working on, within, or in the vicinity of
SWBT's poles, ducts, conduits, or rights-of-way should be familiar with
environmental laws and environmental concerns which arise in outside plant
contexts; that all such employees and other persons should be prepared to
recognize and deal with environmental contingencies existing at specific sites;
and that liabilities associated with environmental claims arising out of or in
connection with the subject matter of this Agreement shall be allocated between
the parties as set forth in this section.

                (a) Each party shall indemnify, on request defend, and hold the
                    other party harmless from any and all suits, claims,
                    demands, losses, damages, liabilities, fines, penalties, or
                    expenses, of every kind and character, on account of or in
                    connection with any injury, loss, or damage to any person or
                    property, or to the environment, arising out of or in
                    connection with the violation or breach, by any employee of
                    the indemnifying party or other person acting on the
                    indemnifying party's behalf, of (1) any federal, state, or
                    local environmental statute, rule, regulation, ordinance, or
                    other law or (2) any provision or requirement of this
                    Agreement dealing with hazardous substances or protection of
                    the environment.

                (b) Each party shall indemnify, on request defend, and hold the
                    other party harmless from any and all suits, claims,
                    demands, losses, damages, liabilities, fines, penalties, or
                    expenses, of every kind and character, on account of or in
                    connection with any injury, loss, or damage to any person or
                    property, or to the environment, arising out of or in
                    connection with the release or discharge, onto any public or
                    private property, of any hazardous substances, regardless of
                    the source of such hazardous substances, by any employee of
                    the indemnifying party, or by any person acting on the
                    indemnifying party's behalf, while present on, within, or in
                    the vicinity of any SWBT pole, duct, conduit, or
                    right-of-way. Indemnities provided by this subsection
                    include but are not limited to indemnities arising out of or
                    in connection with the release or discharge of water and
                    other substances from SWBT's manholes or other conduit
                    facilities.

                                    PAGE 83


<PAGE>   368

                (c) Each party shall indemnify, on request defend, and hold the
                    other party harmless from any and all suits, claims,
                    demands, losses, damages, liabilities, fines, penalties, or
                    expenses, of every kind and character, on account of or in
                    connection with any injury, loss, or damage to any person or
                    property, or to the environment, arising out of or in
                    connection with the removal or disposal of any hazardous
                    substances by the indemnifying party or by any person acting
                    on the indemnifying party's behalf, or arising out of or in
                    connection with the subsequent storage, processing or other
                    handling of such hazardous substances by any person or
                    entity after they have been removed by the indemnifying
                    party or persons acting on the indemnifying party's behalf
                    from the site of any SWBT pole, duct, conduit, or
                    right-of-way. For the purposes of this subsection, any
                    person or entity removing or disposing of hazardous
                    substances at the request of the indemnifying party or at
                    the request of any person acting on the indemnifying party's
                    behalf, and any person or entity subsequently receiving,
                    storing, processing, or otherwise handling such hazardous
                    substances shall be considered to be a person acting on the
                    indemnifying party's behalf.

                (d) Except as otherwise specifically provided in this section,
                    neither party shall be required to indemnify or defend the
                    other party against, or hold the other party harmless from
                    any loss, damage, claim, demand, suit, liability, fine,
                    penalty or expense for which the other party may be liable
                    under any federal, state, or local environmental statute,
                    rule, regulation, ordinance, or other law.

        21.11 Miscellaneous Claims. Applicant shall indemnify, on request
defend, and hold SWBT harmless from any and all suits, claims, demands, losses,
damages, liabilities, fines, penalties, and expenses, of every kind and
character, made, brought, or sought against SWBT by any person or entity,
arising out of or in connection with the subject matter of this Agreement and
based on either:

                (a) claims for taxes, municipal fees, franchise fees,
                    right-to-use fees, and other special charges assessed on
                    SWBT due to the placement or presence of Applicant's
                    facilities on or within SWBT's poles, ducts, conduits, or
                    rights-of-way; or

                (b) claims based on the violation by Applicant of any third
                    party's intellectual property rights, including but not
                    limited to claims for copyright infringement, patent
                    infringement, or unauthorized use or transmission of
                    television or radio broadcast programs or other program
                    material.

                                    PAGE 84
<PAGE>   369

        21.12 Applicant's General Indemnity Obligations to SWBT. This section
applies only in those situations not expressly covered by Sections 21.05-21.11
and does not apply to any suit, claim, demand, loss, damage, or expense
resulting from Applicant's enforcement of its rights against SWBT pursuant to
this Agreement or other provisions in the parties' interconnection agreement, if
any. Except as otherwise expressly provided in this Agreement to the contrary,
and subject to the exclusions set forth in Section 21.04, Applicant shall
indemnify, on request defend, and hold SWBT harmless from any and all suits,
claims, demands, losses, damages, liabilities, fines, penalties, and expenses,
of every kind and character, on account of or in connection with any injury,
loss, or damage to any person or property, or to the environment, arising out of
or in connection with Applicant's access to or use of SWBT's poles, ducts,
conduits, or rights-of-way, Applicant's performance of any acts authorized under
this Agreement, or the presence or activities of Applicant's employees or other
personnel acting on Applicant's behalf on, within, or in the vicinity of SWBT's
poles, ducts, conduits, or rights-of-way.

        21.13 SWBT's General Indemnity Obligations to Applicant. This section
applies only in those situations not expressly covered by Sections 21.05-21.10
and does not apply to any suit, claim, demand, loss, damage, or expense
resulting from SWBT's enforcement of its rights against Applicant pursuant to
this Agreement or other provisions in the parties' interconnection agreement, if
any. Except as otherwise expressly provided in this Agreement to the contrary,
SWBT shall indemnify, on request defend, and hold Applicant harmless from any
and all suits, claims, demands, losses, damages, liabilities, fines, penalties,
and expenses, of every kind and character, on account of or in connection with
any injury, loss, or damage to any person or property, or to the environment,
arising out of or in connection with SWBT's access to or use of SWBT's poles,
ducts, conduits, or rights-of-way, SWBT's performance of any acts authorized
under this Agreement, or the presence or activities of SWBT's employees or other
personnel acting on SWBT's behalf on, within, or in the vicinity of SWBT's
poles, ducts, conduits, or rights-of-way.

        21.14 No Rights, Claims, Causes of Action, or Remedies for the Benefit
of Third Parties. Nothing contained in this article is intended to create any
rights, claims, causes of action, or remedies for the benefit of any third
party.

        21.15 Assertion of Limitation of Liability Defenses. Each party shall
diligently assert the limitation of liability provisions of any applicable
tariff or contract in any case involving injury, loss, or damage to any customer
of such party for which the other party is not exempt from indemnification
liabilities to the indemnified party under this Agreement.

        21.16 Indemnity Liabilities Not Subject to Article 22 Limitations of
Liability. Indemnity liabilities under this article shall not be subject to
Article 22 limitations of liability.

        21.17 Defense of Suits. Upon request by the indemnified party, the
indemnifying party shall defend any suit brought against the indemnified party
for any injury, loss, or 

                                    PAGE 85
<PAGE>   370

damage subject to indemnification under this Agreement. The indemnified party
shall notify the indemnifying party promptly in writing of any written claims,
lawsuits, or demands for which the indemnifying party may be responsible under
this Agreement. The indemnified party shall cooperate in every reasonable way to
facilitate defense or settlement. The indemnifying party shall have the right to
control and conduct the defense and settlement of any action or claim subject to
consultation of the indemnified party. The indemnifying party shall not be
responsible for any settlement unless the indemnifying party approved such
settlement in advance and agrees to be bound by the settlement agreement.

              ARTICLE 22: LIABILITIES AND LIMITATIONS OF LIABILITY

        22.01 LIMITATIONS OF LIABILITY WITH RESPECT TO NEGLIGENT ACTS AND
OMISSIONS. THIS ARTICLE INCLUDES PROVISIONS LIMITING THE LIABILITIES OF EACH
PARTY ARISING OUT OF OR IN CONNECTION WITH CERTAIN NEGLIGENT ACTS AND OMISSIONS
OF SUCH PARTY.

        22.02 LIMITATIONS OF LIABILITY IN GENERAL. EXCEPT AS OTHERWISE EXPRESSLY
PROVIDED IN SECTIONS 21.16 AND 22.05, NEITHER PARTY'S LIABILITY TO THE OTHER
PARTY FOR DAMAGES ATTRIBUTABLE, IN WHOLE OR IN PART, TO ANY NEGLIGENT ACT OR
OMISSION IN THE PERFORMANCE OF THIS AGREEMENT, WHETHER ARISING IN CONTRACT OR
TORT, SHALL EXCEED IN THE AGGREGATE FOR ANY CALENDAR YEAR THE GREATER OF
$250,000, OR THE TOTAL AMOUNT CHARGED BY SWBT TO APPLICANT UNDER THIS AGREEMENT
FOR THE CALENDAR YEARS WHEN THE ACTS OR OMISSIONS GIVING RISE TO LIABILITY
OCCURRED. NOTHING CONTAINED IN THIS SECTION SHALL BE CONSTRUED AS LIMITING
EITHER PARTY'S LIABILITY FOR ACTS OR OMISSIONS CONSTITUTING WILLFUL OR
INTENTIONAL MISCONDUCT OR GROSS NEGLIGENCE BY SUCH PARTY.

        22.03 EXCLUSION OF LIABILITY FOR SPECIAL, INDIRECT, OR CONSEQUENTIAL
DAMAGES. NEITHER PARTY SHALL BE LIABLE TO THE OTHER PARTY FOR ANY INDIRECT,
SPECIAL, CONSEQUENTIAL, INCIDENTAL, OR PUNITIVE DAMAGES, INCLUDING BUT NOT
LIMITED TO LOSS OF ANTICIPATED PROFITS OR REVENUE OR OTHER ECONOMIC LOSS IN
CONNECTION WITH OR ARISING FROM ANY ACT OR FAILURE TO ACT PURSUANT TO THIS
AGREEMENT, EVEN IF THE OTHER PARTY HAS ADVISED SUCH PARTY OF THE POSSIBILITY OF
SUCH DAMAGES. THIS SECTION LIMITS EACH PARTY'S LIABILITY FOR INDIRECT, SPECIAL,
CONSEQUENTIAL, INCIDENTAL, OR PUNITIVE DAMAGES ARISING OUT OF OR IN CONNECTION
WITH NEGLIGENT (INCLUDING GROSSLY NEGLIGENT) ACTS OR OMISSIONS OF SUCH PARTY BUT
DOES NOT LIMIT EITHER PARTY'S LIABILITY FOR INTENTIONAL MISCONDUCT.

                                    PAGE 86

<PAGE>   371

        22.04 SWBT Not Liable to Applicant for Acts of Third Parties or Acts of
God. By affording Applicant access to poles, ducts, conduits, and rights-of-way
owned or controlled by SWBT, SWBT does not warrant, guarantee, or insure the
uninterrupted use of such facilities by Applicant. Except as specifically
provided in Section 22.05 of this Agreement, Applicant assumes all risks of
injury, loss, or damage (and the consequences of any such injury, loss, or
damage) to Applicant's facilities attached to SWBT's poles or placed in SWBT's
ducts, conduits, or rights-of-way, and SWBT shall not be liable to Applicant for
any damages to Applicant's facilities other than as provided in Section 22.05.
In no event shall SWBT be liable to Applicant under this Agreement for any
injury, loss, or damage resulting from the acts or omissions of (1) any joint
user or any person acting on a joint user's behalf, (2) any governmental body or
governmental employee, (3) any third-party property owner or persons acting on
behalf of such property owner, or (4) any licensee, invitee, trespasser, or
other person present at the site or in the vicinity of any SWBT pole, duct,
conduit, or right-of-way in any capacity other than as a SWBT employee or person
acting on SWBT's behalf. In no event shall SWBT be liable to Applicant under
this Agreement for injuries, losses, or damages resulting from acts of God
(including but not limited to storms, floods, fires, and earthquakes), wars,
civil disturbances, espionage or other criminal acts committed by persons or
entities not acting on SWBT's behalf, cable cuts by persons other than SWBT's
employees or persons acting on SWBT's behalf, or other causes beyond SWBT's
control which occur at sites subject to this Agreement.

        22.05 Damage to Facilities. Except as otherwise specifically provided in
this section, neither party shall be liable to the other party for any injury,
loss, or damage (or for the direct or indirect consequences of any such injury,
loss, or damage) to such other party's facilities attached to SWBT's poles or
placed within or in the vicinity of SWBT's poles, ducts, conduits, or
rights-of-way.

                (a) Each party (the "responsible party"), and persons acting on
                    behalf of the responsible party, shall exercise due care to
                    avoid damaging the facilities of the other party (the
                    "injured party"). In the event such damage occurs, the
                    responsible party or persons acting on behalf of the
                    responsible party shall immediately report such damages to
                    the injured party, and the injured party shall promptly make
                    such arrangements as may be necessary to restore service to
                    its customers using the facilities affected.

                (b) The responsible party shall reimburse the injured party for
                    the actual costs incurred by the injured party for repair of
                    facilities damaged by the willful misconduct, grossly
                    negligent acts, grossly negligent omissions, and negligent
                    acts (but not negligent omissions other than grossly
                    negligent omissions) of employees of the responsible party.

                (c) The responsible party shall reimburse the injured party for
                    the actual costs incurred by the injured party for repair of
                    facilities damaged by the 


                                    PAGE 87
<PAGE>   372

                    willful misconduct, grossly negligent acts or omissions,
                    and negligent acts (but not negligent omissions other than
                    grossly negligent omissions) of independent contractors
                    acting on the responsible party's behalf; provided, however,
                    that the injured party shall be limited to recovery of those
                    costs which cannot be recovered from the independent
                    contractor causing the damage. The responsible party shall
                    not be liable to the injured party under this section until
                    the injured party's claims against the independent
                    contractor causing the damage have been adjudicated or
                    settled and the amount of the injured party's claim against
                    the responsible party is determinable.

                (d) NEITHER PARTY SHALL BE REQUIRED BY THIS SECTION TO REIMBURSE
                    THE OTHER PARTY FOR COSTS INCURRED AS A RESULT OF NEGLIGENT
                    OMISSIONS OTHER THAN GROSSLY NEGLIGENT OMISSIONS COVERED BY
                    SUBSECTIONS (c)-(d) OF THIS SECTION.

                (e) THIS SECTION LIMITS, BUT DOES NOT EXCLUDE, THE RESPONSIBLE
                    PARTY'S LIABILITY TO THE INJURED PARTY FOR DAMAGES CAUSED BY
                    NEGLIGENT (INCLUDING GROSSLY NEGLIGENT) ACTS OF THE
                    RESPONSIBLE PARTY AND PERSONS ACTING ON THE RESPONSIBLE
                    PARTY'S BEHALF.

        22.06 No Limitations of Liability in Contravention of Federal or State
Law. Nothing contained in this article shall be construed as exempting either
party from any liability, or limiting such party's liability, in contravention
of federal law or in contravention of the laws of this State.

        22.07 Claims Against Third Parties. Nothing contained in this article
shall be construed as requiring either party to forego any claims that such
party may have against third parties, including but not limited to contractors,
subcontractors, or persons (other than the other party's employees) acting on
the other party's behalf.

                              ARTICLE 23: INSURANCE

        23.01 Insurance Required. Applicant shall comply with the insurance
requirements specified in this section.

                (a) Unless Applicant has provided proof of self-insurance as
                    permitted in Section 23.02 below, Applicant shall obtain and
                    maintain in full force and effect, for so long as this
                    Agreement remains in effect, insurance policies specified in
                    APPENDIX IV of this Agreement. Each policy shall name SWBT
                    as an additional insured and shall include provisions
                    requiring the insurer to give SWBT notice of any lapse,
                    cancellation, or 

                                    PAGE 88
<PAGE>   373

                    termination of the policy or any modification to the policy
                    affecting SWBT's rights under the policy, including but not
                    limited to any decrease in coverage or increase in
                    deductibles.

                (b) Except as provided in this subsection, exclusions from
                    coverage or deductibles, other than those expressly
                    permitted in APPENDIX IV, must be approved in writing by
                    SWBT. For authorized contractors and other contractors
                    performing work on, within, or in the vicinity of SWBT's
                    poles, ducts, conduits, and rights-of-way on Applicant's
                    behalf, exclusions from coverage or deductibles, other than
                    those expressly permitted in APPENDIX IV, must be approved
                    in writing by Applicant.

                (c) Authorized contractors and other contractors performing work
                    on, within, or in the vicinity of SWBT's poles, ducts,
                    conduits, or rights-of-way on Applicant's behalf shall be
                    required to meet the same insurance requirements applicable
                    to contractors performing similar work on SWBT's behalf.
                    Applicant shall be responsible for securing compliance by
                    its contractors with this requirement and shall be liable to
                    SWBT for any damages resulting from its failure to do so.

                (d) Self-insurance shall be permitted for persons and entities
                    (including but not limited to Applicant and authorized
                    contractors) meeting the self-insurance requirements set
                    forth in Section 23.02.

        23.02 Proof of Insurance or Self-insurance. Proof of insurance or
self-insurance shall be made pursuant to the provisions of this section.

                (a) Applicant shall submit to SWBT adequate proof (as determined
                    by SWBT) that the companies insuring Applicant are providing
                    all coverages required by this Agreement. Applicant's
                    insurers shall provide SWBT with certifications that
                    required coverages will not be cancelled, changed or
                    materially altered (e.g., by increasing deductibles or
                    altering exclusions from coverage) except after 30 days
                    written notice to SWBT.

                (b) SWBT will accept certified proof of a person or entity's
                    qualification as a self-insurer for Workers' Compensation
                    and Employers Liability, where self-insurance is permitted,
                    upon receipt of a current copy of a Certificate of Authority
                    to Self-insure issued by the Workers' Compensation
                    Commission of this State. SWBT will accept self-insurance by
                    a person or entity in lieu of other Commercial General
                    Liability and Automobile Liability Coverage if such person
                    or entity warrants that its net worth, as shown by its most
                    recent audited financial statement with no negative notes,
                    is at least 10 times the minimum liability limits set forth
                    in APPENDIX IV and SWBT is satisfied that

                                    PAGE 89
<PAGE>   374

                    such entity will be able to meet its liability obligations
                    under this Agreement.

                (c) Applicant shall be responsible for determining whether
                    contractors and other persons present on Applicant's behalf
                    on, within, and in the vicinity of SWBT's poles, ducts,
                    conduits, and rights-of-way meet the self-insurance
                    requirements of this subsection. Applicant may accept
                    certified proof of any such person's or entity's
                    qualification as a self-insurer for Workers' Compensation
                    and Employers Liability, where self-insurance is permitted,
                    upon receipt of a current copy of a Certificate of Authority
                    to Self-insure issued by the Workers' Compensation
                    Commission of this State. Applicant may accept proof of
                    self-insurance by a person or entity in lieu of other
                    Commercial General Liability and Automobile Liability
                    Coverage if such person or entity warrants that its net
                    worth, as shown by its most recent audited financial
                    statement with no negative notes, is at least 10 times the
                    minimum liability limits set forth in APPENDIX IV and
                    Applicant is satisfied that such entity will be able to meet
                    its liability obligations with respect to activities
                    performed on, within, and in the vicinity of SWBT's poles,
                    ducts, conduits, and rights-of-way.

        23.03 Licensing Contingent on Proof of Insurance. All insurance required
in accordance with APPENDIX IV, or self-insurance as permitted in Section 23.02,
must be in effect before SWBT will issue pole attachment or conduit occupancy
licenses under this Agreement and shall remain in force until all of Applicant's
facilities have been removed from SWBT's poles, ducts, conduits, and
rights-of-way.

        23.04 Failure to Obtain or Maintain Coverage. Applicant's failure to
obtain and maintain the required levels and types of insurance coverage required
under this Agreement shall be grounds for termination of this Agreement and
licenses subject to this Agreement. If an insurance carrier shall at any time
notify Applicant or SWBT that any policy or policies of insurance required under
this Agreement will be cancelled or changed in any manner which will result in
Applicant's failure to meet the requirements of this Agreement, SWBT may
terminate this Agreement and all licenses subject to this Agreement not less
than 60 days after giving Applicant written notice of its intention to do so,
and such termination shall be effective on the termination date specified in the
notice unless Applicant has obtained (or made arrangements satisfactory to SWBT
to obtain) the required coverage from another source. In the alternative, SWBT
may, in its sole discretion, elect to take such action as may be necessary to
keep such policy in effect with the required coverages.

                        ARTICLE 24: ASSIGNMENT OF RIGHTS

        24.01 Assignment Permitted. Neither party may assign or otherwise
transfer its rights or obligations under this Agreement except as provided in
this section.


                                    PAGE 90


<PAGE>   375

                (a) SWBT may assign its rights, delegate its benefits, and
                    delegate its duties and obligations under this Agreement,
                    without Applicant's consent, to any entity controlling,
                    controlled by, or under common control with SWBT or which
                    acquires or succeeds to ownership of substantially all of
                    SWBT's assets.

                (b) Applicant may assign its rights, delegate its benefits, and
                    delegate its duties and obligations under this Agreement,
                    without SWBT's consent, to: any telecommunications carrier
                    or cable system operator which (1) is entitled to access to
                    SWBT's poles, ducts, conduits, and rights-of-way under the
                    Pole Attachment Act and (2) controls, is controlled by, or
                    is under common control with Applicant or acquires and
                    succeeds to ownership of substantially all of Applicant's
                    assets; provided, however, that such assignment shall not be
                    effective until Applicant has given SWBT written notice of
                    the assignment pursuant to Section 24.03 and guaranteed the
                    performance of Applicant's assignee or successor.
                    Applicant's assignee or successor shall assume all
                    outstanding obligations of Applicant under this Agreement,
                    including but not limited to all liabilities and contingent
                    liabilities of Applicant arising out of or in connection
                    with this Agreement.

                (c) Applicant may, ancillary to a bona fide loan transaction
                    between Applicant and any lender, and without SWBT's
                    consent, grant security interests or make collateral
                    assignments in substantially all of Applicant's assets,
                    including Applicant's rights under this Agreement, subject
                    to the express terms of this Agreement. In the event
                    Applicant's lender, in the bona fide exercise of its rights
                    as a secured lender, forecloses on its security interest or
                    arranges for a third party to acquire Applicant's assets
                    through public or private sale or through an Agreement with
                    Applicant, Applicant's lender or the third party acquiring
                    Applicant's rights under this Agreement shall assume all
                    outstanding obligations of Applicant under the agreement and
                    provide proof satisfactory to SWBT that such lender or third
                    party has complied or will comply with all requirements
                    established under this Agreement. Notwithstanding any
                    provisions of this Agreement to the contrary, such
                    foreclosure by Applicant's lender or acquisition of assets
                    by such third party shall not constitute a breach of this
                    Agreement and, upon such foreclosure or acquisition,
                    Applicant's lender or such third party shall succeed to all
                    rights and remedies of Applicant under this Agreement (other
                    than those rights and remedies, if any, which have not been
                    transferred and, if Applicant is a debtor under the Federal
                    Bankruptcy Code, those rights, if any, which remain a part
                    of the debtor's estate notwithstanding an attempted
                    foreclosure or transfer) and to all duties and obligations
                    of Applicant under the Agreement, including liability to

                                    PAGE 91
<PAGE>   376

                    SWBT for any act, omission, default, or obligation that
                    arose or occurred under the Agreement prior to the date on
                    which such lender or third party succeeds to the rights of
                    Applicant under the Agreement, as applicable.

                    (1)  In the event Applicant or Applicant's lender requests
                         that SWBT, in connection with a bona fide loan
                         transaction between Applicant and Applicant's lender,
                         sign any additional consents, or make other
                         accommodations to protect such lender's interest,
                         Applicant or Applicant's lender shall reimburse SWBT
                         for all expenses incurred by SWBT in connection with
                         such requests and accommodations, including but not
                         limited to in-house or outside legal expenses incurred
                         by SWBT in processing the request.

                    (2)  In the event Applicant or Applicant's lender desires
                         that SWBT provide notices to Applicant's lender or
                         permit Applicant's lender, in the event of a breach, to
                         cure any default or termination event if Applicant
                         fails to do so, Applicant shall notify SWBT's
                         authorized agent, as designated in Article 29 of this
                         Agreement, that such notices may be sent to Applicant's
                         lender as well to Applicant. Nothing contained in this
                         subsection shall be construed as imposing any duty on
                         SWBT in favor of Applicant's lender, and this section
                         shall not be construed to provide Applicant's lender or
                         any other third parties with any rights, claims, causes
                         of action of any kind. Applicant waives any and all
                         claims or causes of action, of every kind and
                         character, past, present, or future, arising out of or
                         in connection with the giving of any notice to
                         Applicant's lender pursuant to this section or any
                         failure to give such notice.

                (d) Either party may assign or transfer rights or obligations
                    under this Agreement on such terms and conditions as are
                    mutually acceptable to the other party and with such other
                    party's prior written consent, which consent may be withheld
                    only for due cause and justification.

                (e) No assignment or transfer by Applicant of rights under this
                    Agreement, licenses subject to this Agreement, or
                    authorizations granted under this Agreement shall be
                    effective until Applicant, its successors, and assigns have
                    complied with the provisions of this article, secured SWBT's
                    prior written consent to the assignment or transfer, if
                    necessary, and given SWBT notice of the assignment or
                    transfer pursuant to Section 24.03.

                (f) Except as otherwise expressly provided in this article,
                    neither this Agreement, nor any licenses or authorizations
                    subject to this Agreement, shall inure to the benefit of
                    Applicant's successors or assigns without SWBT's prior
                    written consent.


                                    PAGE 92


<PAGE>   377

        24.02 Incorporations, Mergers, Acquisitions, and Other Changes in
Applicant's Legal Identity. When the legal identity or status of Applicant
changes, whether by incorporation, reincorporation, merger, acquisition, or
otherwise, such change shall be treated as an assignment subject to the
provisions of this article.

        24.03     Notice of Assignment.  Applicant shall provide SWBT with 60 
days advance notice in writing of any assignment.
                  

        24.04 Assignment Shall Not Relieve Applicant of Prior Obligations.
Except as otherwise expressly agreed by SWBT in writing, no assignment permitted
by SWBT under this Agreement shall relieve Applicant of any obligations arising
under or in connection with this Agreement, including but not limited to
indemnity obligations under Article 21 of this Agreement or the interconnection
agreement, if any.

        24.05 Satisfaction of Existing Obligations and Assumption of Contingent
Liabilities. SWBT may condition its approval of any requested assignment or
transfer on the assignee's or successor's payment or satisfaction of all
outstanding obligations of Applicant under this Agreement and the assignee's or
successor's assumption of any liabilities, or contingent liabilities, of
Applicant arising out of or in connection with this Agreement.

        24.06 Satisfaction of All Other Licensing Requirements. Applicant's
assignee or successor must, within 60 days following the assignment, provide
proof satisfactory to SWBT that such assignee or successor has complied or will
comply with all licensing requirements established under this Agreement,
including but not limited to requirements that such assignee or successor
verify, to the best of its information and belief, as provided in Section 17.03,
that all facilities owned or used by such assignee or successor and presently
attached to SWBT's poles or placed within any portion of SWBT's conduit system
within this State have been disclosed to SWBT and are subject to existing
licenses and that such assignee or successor has complied with the insurance
requirements set forth in Article 23 of this Agreement.

        24.07     Additional Post-Assignment Requirements.  Applicant's 
assignee or successor shall, within 60 days following the assignment:

                (a) sign this Agreement as an assignee or successor expressly
                    agreeing to be bound by all provisions of this Agreement and
                    licenses subject to this Agreement;

                (b) provide proof, satisfactory to SWBT, of such assignee's
                    assumption of the obligations of this Agreement; and

                (c) pay a one-time contract administration fee, as provided in
                    APPENDIX I of this Agreement, if no Master Agreement for
                    Access to SWBT's Poles, 

                                    PAGE 93
<PAGE>   378

                    Ducts, Conduits, or Rights-of-Way between SWBT and such
                    assignee is in effect for this State, or an administrative
                    record-keeping fee as provided in APPENDIX I of this
                    Agreement, if there is a Master Agreement in effect for this
                    State.

        24.08 Sublicenses Prohibited. Nothing contained in this Agreement shall
be construed as granting Applicant the right to sublicense any rights under this
Agreement or licenses subject to this Agreement to any third party. Except as
otherwise expressly permitted in this Agreement, Applicant shall not allow third
party to attach or place facilities to or in pole or conduit space occupied by
or assigned to Applicant or to utilize such space.

                ARTICLE 25: TERMINATION OF AGREEMENT OR LICENSES;
                              REMEDIES FOR BREACHES

        25.01 Termination Due to Non-Use of Facilities or Loss of Required
Authority. Applicant shall, by written notice to SWBT, terminate this Agreement
and all licenses subject to this Agreement if Applicant ceases to have authority
to do business or ceases to do business in this State, ceases to have authority
to provide or ceases to provide cable television services in this State (if
Applicant is cable television system having access to SWBT's poles, ducts,
conduits or rights-of-way solely to provide cable television service), ceases to
have authority to provide or ceases to provide telecommunications services in
this State (if Applicant is a telecommunications carrier which does not also
have authority to provide cable television service in this State), or ceases to
make active use of SWBT's poles, ducts, conduits, and rights-of-way in this
State. Applicant shall, by written notice to SWBT, terminate individual licenses
subject to this Agreement if (a) Applicant ceases to utilize the pole attachment
or conduit occupancy space subject to such licenses or (b) Applicant's
permission to use or have access to particular poles, ducts, conduits, or
rights-of-way has been revoked, denied, or terminated for reasons of safety or
any other lawful reason by any federal, state, or local governmental authority
or third-party property owner having authority to revoke, deny, or terminate
such use or access. Responsibility for terminating this Agreement or individual
licenses under the circumstances set forth in this section shall be a
contractual obligation imposed on Applicant, and the failure by Applicant to
terminate this Agreement or individual licenses pursuant to this section shall
be a material breach of this Agreement.

        25.02 Limitation, Termination, or Refusal of Access for Certain Material
Breaches. Applicant's access to SWBT's poles, ducts, conduits, and rights-of-way
shall not materially interfere with or impair service over any facilities of
SWBT or any joint user, cause material damage to SWBT's plant or the plant of
any joint user, impair the privacy of communications carried over the facilities
of SWBT or any joint user, or create serious hazards to the health or safety of
any persons working on, within, or in the vicinity of SWBT's poles, ducts,
rights-of-way or to the public. Upon reasonable notice and opportunity to cure,
SWBT may limit, terminate or refuse access if Applicant violates this provision;
provided, however, that such limitation, termination or refusal will be 

                                    PAGE 94
<PAGE>   379

limited to Applicant's access to poles, ducts, conduits, and rights-of-way
located in the SWBT construction district in which the violation occurs, shall
be as narrowly limited in time and geographic scope as may be necessary to
enable Applicant to adopt suitable controls to prevent further violations, and
shall be subject to review, at Applicant's request, pursuant to the dispute
resolution procedures set forth in this Agreement (or, if applicable, the
parties' interconnection agreement) or, as permitted by law, before any court,
agency, or other tribunal having jurisdiction over the subject matter. In the
event Applicant invokes dispute resolution procedures or seeks review before a
court, agency, or other tribunal having jurisdiction of the subject matter, the
limitation, termination, or refusal of access may be stayed or suspended by
agreement of the parties or by order of the tribunal having jurisdiction over
the parties' dispute.

        25.03 Notice and Opportunity to Cure Breach. In the event of any claimed
breach of this Agreement by either party, the aggrieved party may give written
notice of such claimed breach as provided in this section.

                (a) The notice shall set forth in reasonable detail:

                    (1) the conduct or circumstances complained of, together
                        with the complaining party's legal basis for asserting
                        that a breach has occurred;

                    (2) the action believed necessary to cure the alleged
                        breach; and

                    (3) any other matter the complaining party desires to
                        include in the notice.

                (b) Except as provided in Section 25.02 and subsection (c) of
                    this section, the complaining party shall not be entitled to
                    pursue any remedies available under this Agreement or
                    relevant law unless such notice is given and (1) the
                    breaching party fails to cure the breach within 30 days of
                    such notice, if the breach is one which can be cured within
                    30 days, or (2) the breaching party fails to commence
                    promptly and pursue diligently a cure of the breach, if the
                    required cure is such that more than 30 days will be
                    required to effect such cure; provided, however, that
                    nothing contained in this section shall preclude either
                    party from invoking the dispute resolution procedures set
                    forth in Article 30 of this Agreement, or any complaint or
                    dispute resolution procedures offered by the FCC or State
                    Commission, at any time.

                (c) Nothing contained in this section shall preclude either
                    party from filing a complaint or bringing suit in any court,
                    agency, or other tribunal of competent jurisdiction to
                    restrain or enjoin any conduct of the other party which
                    threatens the complaining party with irreparable injury,
                    loss 


                                    PAGE 95
<PAGE>   380

                    or damage without first giving the notice otherwise required
                    by subsection (b).

        25.04 Remedies for Breach. Subject to the provisions of this article and
the dispute resolution procedures of Article 30, either party may terminate this
Agreement in the event of a material breach by the other party or exercise any
other legal or equitable right which such party may have to enforce the
provisions of this Agreement. Except as otherwise specifically provided in
Section 30.07, in any action based on an alleged breach of this Agreement, the
prevailing party shall be entitled to recover all costs and expenses incurred by
such party, including but not limited to reasonable attorneys' fees.

                         ARTICLE 26: FAILURE TO ENFORCE

        26.01 No Waiver. The failure by either party to take action to enforce
compliance with any of the terms or conditions of this Agreement, to give notice
of any breach, or to terminate this Agreement or any license or authorization
subject to this Agreement shall not constitute a waiver or relinquishment of any
term or condition of this Agreement, a waiver or relinquishment of the right to
give notice of breach, or waiver or relinquishment of any right to terminate
this Agreement. Notwithstanding any such failure, all terms and conditions of
this Agreement and all rights of either party hereunder shall be and remain at
all times in full force and effect.

           ARTICLE 27: EFFECTIVE DATE, TERM, AND ELECTIVE TERMINATION

        27.01 Effective Date. This Agreement shall be effective as of the ___
day of __________, 199_, or, if this Agreement has been entered into as an
appendix, attachment, or exhibit to an interconnection agreement between the
parties, the date of approval by the State Commission of the interconnection
agreement, whichever date first occurs.

        27.02 Initial Term. Unless sooner terminated as herein provided, the
initial term of this Agreement shall run from the effective date until the end
of the calendar year which includes the effective date.

        27.03 Automatic Renewal. Unless sooner terminated as herein provided,
this Agreement shall be automatically renewed for successive one-year terms
beginning on the first day of each calendar year after the effective date.

        27.04 Elective Termination. Either party may terminate this Agreement by
giving the other party at least six months prior written notice as provided in
this section.

                (a) Applicant may terminate this Agreement with or without
                    cause.

                (b) The parties acknowledge that the Pole Attachment Act, 47
                    U.S.C. Section 224(e), as added by the Telecommunications 
                    Act of 1996, expressly 


                                    PAGE 96
<PAGE>   381

                    directs the FCC to promulgate new regulations governing
                    charges to telecommunications carriers for access to poles,
                    ducts, conduits, and rights-of-way and that such new
                    regulations are to take effect five years after the date of
                    enactment of the Telecommunications Act of 1996 (that is,
                    February 8, 2001). The parties further acknowledge that due
                    to nondiscrimination requirements, it is desirable that
                    formal attachment agreements establishing rates, terms, and
                    conditions of access be revised simultaneously, to the
                    extent possible. Accordingly, the parties agree that SWBT
                    may terminate this Agreement only for cause during the
                    period beginning with the effective date of this Agreement
                    through February 8, 2001. Thereafter, SWBT may terminate
                    this Agreement with or without cause, subject to the
                    provisions of subsection (d) and Section 27.05 below.

                (c) The notice of termination shall state the effective date of
                    termination, which date shall be no earlier than the last to
                    occur of the following dates: the last day of the current
                    term of this Agreement or six months after the date the
                    notice is given.

                (d) The elective termination of this Agreement by SWBT under
                    this section shall not require immediate removal of
                    Applicant's facilities from poles, ducts, conduits, and
                    rights-of-way owned or controlled by SWBT and shall be
                    subject to the provisions of Section 27.05 below; provided,
                    however, that Applicant shall, within 60 days after the
                    effective date of the termination, either initiate
                    negotiations for continued access to SWBT's poles, ducts,
                    conduits, and rights-of-way or remove its facilities in
                    accordance with the provisions of Article 18 of this
                    Agreement.

        27.05 Effect of Elective Termination. Elective termination of this
Agreement by Applicant, as permitted under Section 27.04 of this Agreement,
shall not affect Applicant's liabilities and obligations incurred under this
Agreement prior to the effective date of termination and shall not entitle
Applicant to the refund of any advance payment made to SWBT under this
Agreement. Elective termination of this Agreement by SWBT shall not affect
SWBT's obligations to afford access to SWBT's poles, ducts, conduits, and
rights-of-way owned or controlled by SWBT as required by the Pole Attachment
Act, the Telecommunications Act of 1996, and other applicable laws, regulations,
and commission orders.

                   ARTICLE 28: CONFIDENTIALITY OF INFORMATION

        28.01 Information Provided by Applicant to SWBT. Except as otherwise
specifically provided in this Agreement, all company-specific and
customer-specific information submitted by Applicant to SWBT in connection with
this Agreement (including but not limited to information submitted in connection
with Applicant's applications for the assignment of pole attachment and
occupancy space and for pole 

                                    PAGE 97
<PAGE>   382

attachment and conduit occupancy licenses) shall be deemed to be "confidential"
or "proprietary" information of Applicant and shall be subject to the terms set
forth in this article. Confidential or proprietary information specifically
includes information or knowledge related to Applicant's review of records
regarding a particular market area, or relating to assignment of space to
Applicant in a particular market area, and further includes knowledge or
information about the timing of Applicant's request for or review of records or
its inquiry about SWBT facilities. This article does not limit the use by SWBT
of aggregate information relating to the occupancy and use of SWBT's poles,
ducts, conduits, and rights-of-way by firms other than SWBT (that is,
information submitted by Applicant and aggregated by SWBT in a manner that does
not directly or indirectly identify Applicant).

        28.02 Access Limited to Persons with a Need to Know. Confidential or
proprietary information provided by Applicant to SWBT in connection with this
Agreement shall not be disclosed to, shared with, or accessed by any person or
persons (including but not limited to personnel involved in sales, marketing,
competitive intelligence, competitive analysis, strategic planning, and similar
activities) other than those who have a need to know such information for the
limited purposes set forth in Sections 28.03-28.06.

        28.03 Permitted Uses of Applicant's Confidential Information.
Notwithstanding the provisions of Sections 28.01 and 28.02 above, SWBT and
persons acting on SWBT's behalf may utilize Applicant's confidential or
proprietary information for the following purposes: (a) posting information, as
necessary, to SWBT's outside plant records; (b) placing, constructing,
installing, operating, utilizing, maintaining, monitoring, inspecting,
repairing, relocating, transferring, conveying, removing, or managing SWBT's
poles, ducts, conduits, and rights-of-way and any SWBT facilities located on,
within, or in the vicinity of such poles, ducts, conduits, and rights-of-way;
(c) performing SWBT's obligations under this Agreement and similar agreements
with third parties; (d) performing SWBT's general obligations to afford
nondiscriminatory access to telecommunications carriers and cable television
systems under the Pole Attachment Act; (e) determining which of SWBT's poles,
ducts, conduits, and rights-of-way are (or may in the future be) available for
SWBT's own use, and making planning, engineering, construction, and budgeting
decisions relating to SWBT's poles, ducts, conduits, and rights-of-way; (f)
preparing cost studies; (g) responding to regulatory requests for information;
(h) maintaining SWBT's financial accounting records; and (i) complying with
other legal requirements relating to poles, ducts, conduits, and rights-of-way.

        28.04 Access by Third Parties. Information reflecting the assignment of
pole attachment and conduit occupancy space to Applicant may be made available
to personnel of third parties seeking access to SWBT's records under provisions,
and subject to protections, equivalent to those contained and required by
Section 7.03 of this Agreement.

                                    PAGE 98
<PAGE>   383

        28.05 Defense of Claims. In the event of a dispute between SWBT and any
person or entity, including Applicant, concerning SWBT's performance of this
Agreement, satisfaction of obligations under similar agreements with third
parties, compliance with the Pole Attachment Act, compliance with the
Telecommunications Act of 1996, or compliance with other federal, state, or
local laws, regulations, commission orders, and the like, SWBT may utilize
confidential or proprietary information submitted by Applicant in connection
with this Agreement as may be reasonable or necessary to demonstrate compliance,
protect itself from allegations of wrongdoing, or comply with subpoenas, court
orders, or reasonable discovery requests; provided, however, that SWBT shall not
disclose Applicant's proprietary or confidential information without first, at
SWBT's option: (a) obtaining an agreed protective order or nondisclosure
agreement that preserves the confidential and proprietary nature of Applicant's
information; (b) seeking such a protective order as provided by law if no agreed
protective order or nondisclosure agreement can be obtained; or (c) providing
Applicant notice of the subpoena, demand, or order and an opportunity to take
affirmative steps of its own to protect such proprietary or confidential
information.

        28.06 Response to Subpoenas, Court Orders, and Agency Orders. Nothing
contained in this article shall be construed as precluding SWBT from complying
with any subpoena, civil or criminal investigative demand, or other order issued
or entered by a court or agency of competent jurisdiction; provided, however,
that SWBT shall not disclose Applicant's proprietary or confidential information
without first, at SWBT's option: (a) obtaining an agreed protective order or
nondisclosure agreement that preserves the confidential and proprietary nature
of Applicant's information; (b) seeking such a protective order as provided by
law if no agreed protective order or nondisclosure agreement can be obtained; or
(c) providing Applicant notice of the subpoena, demand, or order and an
opportunity to take affirmative steps of its own to protect such proprietary or
confidential information.

        28.07 Other Uses of Confidential Information. No other uses of
confidential information received from Applicant pursuant to this Agreement are
authorized or permitted without Applicant's express written consent.

                               ARTICLE 29: NOTICES

        29.01 Notices to Applicant. Except as otherwise provided in APPENDIX VI
("Notices to Applicant"), all written notices required to be given to Applicant
shall be delivered or mailed to Applicant's duly authorized agent or attorney,
as designated in this section.

                (a) Such notice may be delivered to Applicant's duly authorized
                    agent or attorney in person or by agent or courier receipted
                    delivery.

                (b) Such notice may be mailed to Applicant's duly authorized
                    agent or attorney by registered or certified mail, return
                    receipt requested. When 


                                    PAGE 99
<PAGE>   384

                    notice is given by mail, such notice shall be complete upon
                    deposit of the notice, enclosed in a postpaid, properly
                    addressed wrapper, in a post office or official depository
                    under the care and control of the United States Postal
                    Service and shall be deemed to have been given three days
                    after the date of deposit.

                (c) Applicant may authorize delivery of the notice by telephonic
                    document transfer to the Applicant's duly authorized agent
                    or attorney. Notice by telephonic document transfer after
                    5:00 p.m. local time of the recipient shall be deemed given
                    on the following day.

                (d) Notices to Applicant shall be sent to the authorized agent
                    or attorney designated below:

                    Name: ______________________________________________________

                    Title: _____________________________________________________

                    Firm: ______________________________________________________

                    Address: ___________________________________________________

                    City/State/Zip: ____________________________________________

        29.02 Notices to SWBT. Except as otherwise provided in APPENDIX VII
("Notices to SWBT"), all written notices required to be given to SWBT shall be
delivered or mailed to SWBT's duly authorized agent or attorney, as designated
in this section.

                (a) Such notice may be delivered to SWBT's duly authorized agent
                    or attorney in person or by agent or courier receipted
                    delivery.

                (b) Such notice may be mailed to SWBT's duly authorized agent or
                    attorney by registered or certified mail, return receipt
                    requested. When notice is given by mail, such notice shall
                    be complete upon deposit of the notice, enclosed in a
                    postpaid, properly addressed wrapper, in a post office or
                    official depository under the care and control of the United
                    States Postal Service and shall be deemed to have been given
                    three days after the date of deposit.

                (c) SWBT may authorize delivery of the notice by telephonic
                    document transfer to SWBT's duly authorized agent or
                    attorney. Notice by telephonic document transfer after 5:00
                    p.m. local time of the recipient shall be deemed given on
                    the following day.

                                    PAGE 100


<PAGE>   385

                (d) On the effective date of this Agreement, and until further
                    notice to Applicant, SWBT's duly authorized agent shall be
                    the Utility Liaison Supervisor ("ULS") designated in
                    APPENDIX VIII.

        29.03 Changes in Notice Requirements. Either party may, from time to
time, change notice addressees and addresses by giving written notice of such
change to the other party. Such notice shall state, at a minimum, the name,
title, firm, and full address of the new addressee.

                         ARTICLE 30: DISPUTE RESOLUTION

        30.01 Purpose. The provisions of this article are intended to minimize
litigation between the parties with respect to disputes arising in connection
with this Agreement and shall be construed accordingly. Any dispute between the
parties arising under this Agreement may be submitted by either party for
resolution under this article.

        30.02 Exclusive Remedy for Monetary Claims under $25,000. Except for
actions seeking injunctive relief related to the purposes of this Agreement or
suits to compel compliance with the dispute resolution processes set forth in
this article, the parties agree to use the dispute resolution processes set
forth in this Agreement as their sole remedy with respect to any monetary claim
of $25,000 or less which arises out of or in connection with this Agreement.

        30.03 Prerequisite to Litigation. The provisions of this article shall
also apply to all disputes, without regard to the amount in controversy, in
which Applicant contests charges billed by SWBT to Applicant under the terms of
this Agreement. No suit, except for actions seeking injunctive relief related to
the purposes of this Agreement or suits to compel compliance with the dispute
resolution processes set forth in this article, shall be filed by either party
against the other with respect to such contested charges until the parties have
engaged in good faith negotiations as provided in Section 30.04, and, if the
parties agree, in mediation under Section 30.05.

        30.04 Good Faith Negotiation.  Good faith negotiation as provided in 
this section shall be the first step in the dispute resolution process.

                (a) With respect to any dispute subject to the provisions of
                    this article, either party may initiate negotiation
                    proceedings by writing a certified or registered letter to
                    the other party setting forth the particulars of the
                    dispute, the terms of the Agreement that are involved, and a
                    suggested resolution of the problem.

                (b) The recipient of the letter shall respond within 21 days to
                    the proposed solution. The recipient shall either agree to
                    the proposed solution or explain its disagreement.

                                    PAGE 101
<PAGE>   386

                (c) If the correspondence does not resolve the dispute, each
                    party, at the request of either party, will appoint a
                    knowledgeable, responsible representative to meet and
                    negotiate in good faith to resolve the dispute. The
                    location, form, frequency, duration, and conclusion of these
                    discussions shall be left to the discretion of the
                    representatives. Upon agreement, the representatives may
                    utilize other alternative dispute resolution procedures such
                    as mediation to assist in the negotiations.

                (d) Discussions and correspondence among the representatives as
                    provided by this section are for purposes of settlement, are
                    exempt from discovery and production, and shall not be
                    admissible in arbitration, judicial, regulatory, or other
                    proceedings in any forum.

        30.05 Mediation. If the parties agree to mediation, the mediation may be
conducted as provided in this section or in such other manner as may be mutually
agreeable to the parties.

                (a) If agreed to by the parties, the dispute shall be referred
                    to the nearest office of the American Arbitration
                    Association, or such other mediator as may be selected by
                    agreement of the parties, for mediation, that is, an
                    informal, non-binding conference or conferences between the
                    parties in which a mediator will seek to guide the parties
                    to a resolution of the dispute.

                (b) If the dispute is referred to the American Arbitration
                    Association, the parties are free to select any mutually
                    acceptable panel member from the list of mediators at the
                    American Arbitration Association. If the parties cannot
                    agree or have no particular choice of a mediator and simply
                    request that the American Arbitration Association assign a
                    mediator to the dispute, then a list and resumes of
                    available mediators, numbering one more than there are
                    parties, will be sent to the parties, each of whom may
                    strike one name leaving the remaining name as the mediator.
                    If more than one name remains, the designated mediator shall
                    be selected by the Administrator of the American Arbitration
                    Association from the remaining names.

                (c) Mediation sessions shall be private.

                (d) All records, reports or other documents considered by the
                    mediator shall be confidential.

                (e) The parties agree that the mediator shall not be compelled
                    to divulge confidential materials or to testify about the
                    mediation in arbitration, regulatory, judicial, or other
                    proceedings in any forum.

                                    PAGE 102
<PAGE>   387

                (f) The parties agree to maintain the confidentiality of the
                    mediation and shall not rely on, or introduce as evidence in
                    any arbitration, judicial, or other proceeding:

                    (1) views expressed or suggestions made by the other party 
                        with respect to a possible settlement of the dispute;

                    (2) admissions made by the other party during the mediation
                        proceedings;

                    (3) proposals made or views expressed by the mediator; or

                    (4) the fact that the other party had or had not indicated
                        willingness to accept a proposal for settlement made by
                        the mediator.

                (g) Subsections (e) and (f) of this section shall apply to
                    anything said, done or occurring in the course of the
                    mediation, including any private caucus or discussions
                    between the mediator and any party or counsel before or
                    after the joint mediation session. There shall be no
                    stenographic record of the mediation process, except to
                    memorialize a settlement record.

                (h) The mediation process shall be considered settlement
                    negotiation for the purpose of all state and federal rules
                    protecting disclosures made during such conferences from
                    later discovery or use in evidence. All conduct, statements,
                    promises, offers, views, and opinions, oral or written, made
                    during the mediation by any party or a party's agent,
                    employee, or attorney are confidential and, where
                    appropriate, are to be considered work product and
                    privileged. Such conduct, statements, promises, offers,
                    views, and opinions shall not be subject to discovery or
                    admissible for any purpose, including impeachment, in any
                    litigation or other proceeding involving the parties;
                    provided, however, that evidence otherwise subject to
                    discovery or admissible is not excluded from discovery or
                    admission in evidence simply as a result of its having been
                    used in connection with this settlement process.

        30.06 Arbitration. If negotiations and mediations do not resolve the
dispute within 90 days after the initiation of dispute resolution proceedings as
provided in subsection (a) of Section 30.04 of this Agreement, the dispute shall
be submitted to binding arbitration by a single arbitrator pursuant to the
Commercial Arbitration Rules of the American Arbitration Association if the
dispute involves any monetary claim of $25,000 or less which arises out of or in
connection with this Agreement. The parties may voluntarily elect to arbitrate
disputes in which the amount in controversy exceeds $25,000, but they shall not
be required by this Agreement to do so.

                                    PAGE 103

<PAGE>   388

                (a) Either party may demand such arbitration in accordance with
                    the procedures set out in the Commercial Arbitration Rules.

                (b) Discovery shall be controlled by the arbitrator and shall be
                    permitted to the extent set out in this subsection.

                    (1)  Each party may submit in writing to any other party,
                         and such other party shall so respond, to a maximum of
                         any combination of 35 of the following:
                         interrogatories, document production requests, and
                         requests for admissions. The interrogatories, document
                         production requests, and requests for admissions shall
                         not have subparts.

                    (2)  Additional discovery may be permitted upon mutual
                         agreement of the parties or upon order of the
                         arbitrator on a showing of good cause.

                (c) The arbitrator shall control the scheduling so as to process
                    the matter expeditiously. The times set forth in this
                    subsection shall apply unless extended upon mutual agreement
                    of the parties or by the arbitrator on a showing of good
                    cause.

                    (1) The arbitration hearing shall commence within 60 days
                        of the demand for arbitration and shall be held, in the
                        absence of agreement by the parties to a different
                        venue, in St. Louis, Missouri.

                    (2) The parties shall submit written briefs five days before
                        the hearing.

                    (3) The arbitrator shall rule on the dispute by issuing a 
                        written opinion within 30 days after the close of
                        hearings.

                    (4) The arbitrator shall have no authority to order punitive
                        or consequential damages.

                    (5) Judgment upon the award rendered by the arbitrator may
                        be entered in any court of competent jurisdiction.

        30.07 Costs. Except as specifically provided in this section, each party
shall bear its own costs of all dispute resolution procedures under this
article.

                (a) A party seeking discovery shall reimburse the responding
                    party for the costs incurred by the responding party in
                    producing documents.

                (b) The parties shall equally split the fees of the arbitration
                    and the arbitrator.


                                    PAGE 104
<PAGE>   389

        30.08 No Abridgment of Rights under the Communications Act of 1934 or
the Pole Attachment Act. Nothing contained in this article shall abridge the
rights of either party to seek relief from the FCC with respect to any dispute
subject to the jurisdiction of the FCC under the Communications Act of 1934 or
the Pole Attachment Act, or from the State Commission with respect to any
dispute subject to its jurisdiction, except that the parties may not seek relief
from the FCC or the State Commission with respect to any dispute that has
already been resolved by mediation under Section 30.05 or by binding arbitration
under Section 30.06.

                        ARTICLE 31: ACCESS TO APPLICANT'S
                    POLES, DUCTS, CONDUITS, AND RIGHTS-OF-WAY

        31.01 No Reciprocal Access to Applicant's Facilities. This Agreement
does not include provisions for reciprocal access by SWBT to Applicant's poles,
ducts, conduits, and rights-of-way.

                         ARTICLE 32: GENERAL PROVISIONS

        32.01 Entire Agreement. This Agreement, together with the
interconnection agreement, if any, to which this Agreement is an
appendix,attachment, or exhibit, sets forth the entire understanding and
agreement of the parties.

        32.02 Prior Agreements Superseded. This Agreement supersedes all prior
agreements and understandings, whether written or oral, between Applicant and
SWBT relating to the placement and maintenance of Applicant's facilities on and
within SWBT's poles, ducts, and conduits within this State.

        32.03 Amendments Shall Be in Writing. Except as otherwise specifically
provided to the contrary by other provisions of this Agreement, the terms and
conditions of this Agreement shall not be amended, changed or altered except in
writing and with approval by authorized representatives of both parties.

        32.04 Survival of Obligations. Any liabilities or obligations of either
party for acts or omissions prior to the termination of this Agreement, any
obligations of either party under provisions of this Agreement relating to
confidential and proprietary information, indemnification, limitations of
liability, and any other provisions of this Agreement which, by their terms, are
contemplated to survive (or be performed after) termination of this Agreement,
will survive the termination of this Agreement.

        32.05 Multiple Counterparts.  This Agreement may be executed in 
multiple counterparts.

        32.06 Effect on Licenses Issued Under Prior Agreements. All currently
effective pole attachment and conduit occupancy licenses granted to Applicant
shall, on the 


                                    PAGE 105
<PAGE>   390

effective date of this Agreement, be subject to the rates, terms, conditions,
and procedures set forth in this Agreement.

        32.07 Force Majeure. Except as otherwise specifically provided in this
Agreement, neither party will be liable for any delay or failure in performance
of any part of this Agreement caused by a Force Majeure condition, including
acts of the United States of America or any state, territory, or political
subdivision thereof, acts of God or a public enemy, fires, floods, disputes,
freight embargoes, earthquakes, volcanic actions, wars, civil disturbances,
cable cuts, or other causes beyond the reasonable control of the party claiming
excusable delay or other failure to perform; provided, however, that Force
Majeure will not include acts of any governmental authority relating to
environmental, health, or safety conditions at work locations. If any Force
Majeure condition occurs, the party whose performance fails or is delayed
because of such Force Majeure condition will give prompt notice to the other
party, and, upon cessation of such Force Majeure condition, will give like
notice and commence performance hereunder as promptly as reasonably practicable.

        32.08 Severability. If any article, section, subsection, or other
provision or portion of this Agreement is or becomes invalid under any
applicable statute or rule of law, and such invalidity does not materially alter
the essence of this Agreement as to either party, the invalidity of such
provision shall not render this entire Agreement unenforceable and this
Agreement shall be administered as if it did not contain the invalid provision.

        32.09 Choice of Law. Except to the extent that federal law controls any
aspect of this Agreement, the validity of this Agreement, the construction and
enforcement of its terms, and the interpretation of the rights and duties of the
parties will be governed by the laws of this State, applied without regard to
the provisions of this State's laws relating to conflicts-of-laws.

        32.10 Changes in the Law. Because the primary purpose of this Agreement
is to provide access to poles, ducts, conduits, and rights-of-way in accordance
with the Pole Attachment Act, as amended by the Telecommunications Act of 1996
and subsequent amendments, the parties contemplate that changes in this
Agreement may from time to time be necessary or desirable to conform to changes
in the Pole Attachment Act as that Act is amended, interpreted, and applied.
This Agreement is based in large part on regulatory decisions by the FCC, which
has jurisdiction over the rates, terms, and conditions of access to poles,
ducts, conduits, and rights-of-way (except to the extent that such jurisdiction
has been pre-empted by individual states) and decisions by the State Commission.
More specifically, this Agreement is based in large part on the FCC's First
Interconnection Order in CC Docket No. 96-98, on FCC rules announced with the
First Interconnection Order, and on Arbitration Orders by the State Commission.

                  [  ] Applicant desires to have access to SWBT's poles, ducts, 
                       conduits, and rights-of-way on terms that are not less
                       favorable than those obtained by firms participating in
                       interconnection arbitration

                                    PAGE 106
<PAGE>   391

                       proceedings before the State Commission. Applicant also
                       desires to have access to SWBT's poles, ducts, conduits,
                       and rights-of-way to the full extent permitted under the
                       FCC's First Interconnection Order in CC Docket No. 96-98.
                       SWBT is entering into this Agreement for the purpose of
                       providing nondiscriminatory access in compliance with the
                       Pole Attachment Act and regulatory decisions thereunder,
                       including decisions by the State Commission in
                       interconnection arbitration proceedings in which
                       Applicant is not a party. Each party is entering into
                       this Agreement based on current interpretations of the
                       law by the FCC and State Commission. In the event of any
                       changes in the Pole Attachment Act, changes in applicable
                       FCC or State Commission rulings, or judicial
                       determinations that such rulings are erroneous or
                       invalid, each party shall, at the request of the other,
                       engage in good faith negotiations to supplement, amend or
                       replace any provisions of this Agreement affected by such
                       changes or determinations and to conform this Agreement
                       to changes in the underlying laws on which the Agreement
                       is based.

                [  ]   This Agreement has been entered into as a result of 
                       private negotiation between the parties and arbitration
                       by the State Commission, acting pursuant to the
                       Telecommunications Act of 1996. If the actions of any
                       legislative bodies, courts, or regulatory agencies of
                       competent jurisdiction invalidate, modify, or stay the
                       enforcement of laws, rules, regulations, or commission
                       orders that were the basis for a provision of this
                       Agreement (including but not limited to any provision of
                       this Agreement required by any arbitration award approved
                       by the State Commission), the affected provision shall be
                       invalidated, modified, or stayed as required by action of
                       the legislative body, court, or regulatory agency. In the
                       event of such a change in the law, each party shall
                       expend diligent efforts to arrive at an agreement
                       respecting the modifications to the Agreement required by
                       the law or requested in good faith by the other party. If
                       negotiations fail, disputes between the parties
                       concerning interpretation of the actions required or
                       provisions affected by such governmental actions shall be
                       resolved pursuant to the dispute resolution process
                       provided for in the interconnection agreement or this
                       Agreement; provided, however, that this section shall not
                       be construed as precluding either party from seeking
                       appropriate relief from the FCC in connection with the
                       parties' rights and obligations under the Pole Attachment
                       Act. In the event of any material change in the law, each
                       party agrees to enter into good faith negotiations to
                       conform this Agreement to the changes in the law. 


                                    PAGE 107
<PAGE>   392

THIS AGREEMENT CONTAINS A BINDING ARBITRATION PROVISION
WHICH MAY BE ENFORCED BY THE PARTIES.

SOUTHWESTERN BELL TELEPHONE COMPANY


By:   ____________________________________________________________________
      Signature of SWBT's Authorized Officer/Employee

      ____________________________________________________________________
      Name of SWBT's Authorized Officer/Employee (Printed or Typed)

      ____________________________________________________________________
      Position/Title of SWBT's Authorized Officer/Employee

      ____________________________________________________________________
      Date

      ____________________________________________________________________
      City and State of Execution by SWBT



__________________________________________________________________________
Applicant's Name (Printed or Typed)


By:   ____________________________________________________________________
      Signature of Applicant's Authorized Officer/Employee

      ____________________________________________________________________
      Name of Authorized Officer/Employee (Printed or Typed)

      ____________________________________________________________________
      Position/Title of Authorized Officer/Employee

      ____________________________________________________________________
      Date

      ____________________________________________________________________
      City and State of Execution by Applicant

                                    PAGE 108
<PAGE>   393


                                           Agreement No. _______________________
               
                                   APPENDIX I
          SCHEDULE OF RATES, FEES AND CHARGES (ARKANSAS) -- PAGE 1 OF 4

         This Appendix is an integral part of the Master Agreement for Access to
Poles, Ducts, Conduits, and Rights-of-Way to which it is attached and sets forth
the rates, fees and charges to be paid by Applicant to SWBT pursuant to the
Master Agreement and licenses subject to the Master Agreement. The rates, fees,
and charges set forth in this Appendix shall be subject to all applicable laws,
rules, regulations, and commission orders as provided in Section 19.01 of the
Master Agreement and shall be subject to revision as provided in Section 19.12
of the Master Agreement.

A)     Pole Attachment Fees

       1)     General

              a)    For billing purposes, pole attachments shall be considered
                    i) to have commenced on the first to occur of the following
                    dates: the date of assignment (or provisional assignment) of
                    pole attachment space, the date a license for such pole
                    attachment is issued, or the date of actual attachment and
                    ii) to have ended on the last to occur of the following
                    dates: the date Applicant's assignment lapses or is
                    relinquished, the date of actual removal of the attached
                    facilities from SWBT's pole, or the date of termination of
                    Applicant's license.

              b)    Fees shall be payable semiannually in advance on the first
                    days of January and July and shall be prorated on a daily
                    basis as provided in Section 19.04. Fees for pole
                    attachments shall be based on the number of pole attachments
                    as of the date of billing. If Applicant occupies more than
                    one usable space on a pole, separate attachment fees shall
                    apply to each space occupied. For billing purposes, a single
                    pole attachment includes the point of attachment and all
                    facilities located in the usable space on the pole in the
                    space assigned to Applicant (typically six inches above and
                    six inches below the point of attachment), together with
                    routine ancillary apparatus such as anchors, anchor/guy
                    strands, drive rings, J-hooks, dead-end clamps, and other
                    apparatus which does not interfere with the ability of SWBT
                    to occupy or assign usable space on the pole other than the
                    usable space licensed to Applicant. Fees for pole space
                    assignments and unauthorized pole attachments shall be
                    billed in the same manner as if a license had been issued.

       2)     Fees (1997 Rates)

              Semiannual Pole Attachment Fees             Annual     Semiannual

              Per pole attachment (cable service only)     $ 2.35      $ 1.175
                                                           ------      -------
              Per pole attachment (telecommunications 
               carriers)                                   $ 2.35      $ 1.175
                                                           ------      -------
              Per pole attachment (other)                  $  N/A      $   N/A
                                                           ------      -------
<PAGE>   394

                                   APPENDIX I
             SCHEDULE OF FEES AND CHARGES (ARKANSAS) -- PAGE 2 OF 4

B)     Conduit Occupancy Fees

       1)     General

              a)    For billing purposes, conduit occupancy shall be considered 
                    to have i) begun on the first to occur of the following
                    dates: the date of assignment (or provisional assignment) of
                    conduit occupancy space, the date a license for such conduit
                    occupancy is issued, or the date of actual occupancy; and
                    ii) ended on the last to occur of the following dates: the
                    date Applicant's assignment lapses or is relinquished, the
                    date of actual removal of the attached facilities from
                    SWBT's conduit, or the date of termination of Applicant's
                    license. Occupancy ends when facilities have been removed
                    from SWBT's conduit system and required post-removal
                    procedures (e.g., plugging - - ducts) have been completed.
                    Fees for conduit space assignments and unauthorized conduit
                    occupancy shall be billed in the same manner as if a license
                    had been issued.

              b)    Fees shall be payable semiannually in advance on the first 
                    days of January and July.

        (2)   Fees (1997 Rates)

              Semiannual Per Foot Conduit Occupancy Fees   Annual     Semiannual
              Full duct/duct foot (cable service only)   $ 0.41/ft   $ 0.205/ft
                                                         ----------  -----------
              Full duct/duct foot (telecommunications 
               carriers)                                 $ 0.41/ft   $ 0.205/ft
                                                         ----------  -----------
              Full duct/duct foot (other)                $  N/A      $  N/A 
                                                         ----------  -----------

              Half duct/duct foot (cable service only)*  $ 0.205/ft  $ 0.1025/ft
                                                         ----------  -----------
              Half duct/duct foot (telecommunications 
               carriers)*                                $ 0.205/ft  $ 0.1025/ft
                                                         ----------  -----------
              Half duct/duct foot (other)*               $  N/A      $  N/A
                                                         ----------  -----------

                      *Each inner duct is billed at the half duct rate.

              a)    Facility footage shall be measured i) from the center of one
                    manhole to the center of an adjacent manhole if the facility
                    runs between two manholes, ii) from the center of a manhole
                    to the end of a duct not terminated in a manhole, or iii)
                    from the center of a manhole to the property line if the
                    duct is connected at the property line to a duct owned and
                    controlled by a third-party property owner.

              b)    Semiannual full duct conduit occupancy fees will apply to
                    the first facility placed in a previously unoccupied duct
                    except as provided in c)-d) below.

              c)    If two or more facilities occupy a duct that has not been
                    subdivided by inner duct, a semiannual half duct conduit
                    occupancy fee will be charged for each facility placed in
                    the duct.
<PAGE>   395
                                                       Agreement No. __________

                                  APPENDIX III
                  ADMINISTRATIVE FORMS AND NOTICES (ANKANSAS)


         This Appendix is an integral part of the Master Agreement for Access to
Poles, Ducts, Conduits, and Rights-of-Way to which it is attached and contains
administrative forms referred to in the Master Agreement or used in connection
with the provision of access to SWBT's poles, ducts, conduits, and
rights-of-way. The forms are forms presently in use and have not been conformed
to the Master Agreement. The forms may be further revised by SWBT to conform to
the Master Agreement and revised from time to time to reflect changes in the
applicable law, changes in the Master Agreement, and changes in the procedures
through which access to poles, ducts, conduits, and rights-of-way is afforded by
SWBT to Applicant and others.

         SW-9433:    Pole Attachments

         SW-9434:    Access Application and Make-Ready Authorization

         SW-9435:    Conduit Occupancy

         SW-9436A:   Notification of Surrender or Modification of Pole 
                     Attachment License by Licensee

         SW-9436B:   Notification of Surrender or Modification of Conduit 
                     Occupancy License by Applicant

         SW-9436C:   Notification of Unauthorized Attachments by Applicant



<PAGE>   396


<TABLE>
<S><C>


[LOGO] Southwestern Bell Telephone
Retention Period:  Active, Plus 5 Years                           Pole Attachments                 PAGE ___ OF ____ 
FIRM'S NAME: _____________________________         [  ]  Provisional, Records Based Assignment     TYPE: __________ 
AGREEMENT No.: ___________________________                      [ ] Pre-Occupancy Survey                       
APPLICATION No.: _________________________                                                                    (CATV, Telecom, Other)
                                                                                                  
                                                                                                  
                                                                                                  

                                                                                                                                    
Item     Record      Pole       Ownership       Street      Proposed     Guy       Make Ready    Make Ready     Pole Mntd    
   #         #          #        SWBT or       Address      Attachment    Rq'd        Work      Description     Apparatus    
                                  Power                      Height      Y or N      Y or N                     Height       
 1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
16
17
18
19
20
         TOTAL


                     Number of Cables _____________________                             Other Notes: ______________________________
                     Weight/per ft. and Size/O.D. ____________                         ____________________________________________
                     Number and Types of Strands ____________                           ___________________________________________



                                                 
                                                 
                                                 
                                                 
                                                 
                                                 
                                                 
                                                 
                                                 
                                                 
                                                 
                                                 
                                                 
                                                 
                                                 
                                                 
                                                 
                                                 
                                                 
                                                 
                                                 
                                                 
                                                 
                                                 
                                                 

                                                              Date: _____________
                                                              Time: _____________
         SIGNED: ____________________________________                                  SIGNED: ____________________________________
                  SWBT Representative                                                                   Applicant's Representative
                                                           /   / Official File Copy, If Checked in Red
</TABLE>
                                                                       SW-9433
                                                                     (Rev. 3-97)
<PAGE>   397


                                     SW9433
                                POLE ATTACHMENTS
                                FORM INSTRUCTIONS

From SW9433 may be used for the following two purposes, Provisional, Records
Based Assignment or as the Pre-Occupancy Survey. The applicant may complete the
SW9433 and submit this to SWBT while reviewing the records and make a
Provisional, Records Based Assignment. The applicant will also use this form
when making the Pre-Occupancy Survey as a reference sheet of information
required for acquiring pole attachment space

REQUIRED INFORMATION FOR PROVISIONAL, RECORDS BASED ASSIGNMENT

FIRM'S NAME: Name of firm requesting pole attachment space.

AGREEMENT No.:  Number obtained from the Master Agreement Number.

APPLICATION No.: Will be provided by applicant in sequential ascending order.

[ ] Provisional, Records Based Assignment: Applicable when an applicant elects
to a Provisional, Records Based Assignment. The form will be signed and dated at
the bottom by both the applicant and the SWBT representative. A copy will be
provided to the applicant and the original will be maintained by SWBT.

Type:  The applicant states that they are a CATV, a Telecommunications Carrier 
or a firm other than the aforementioned two.

Record #: The SWBT paper record or the SWBT mechanized record number.

Pole #: Applicant will supply the pole number either from the SWBT Records or
from a field visit.

Ownership: Applicant will determine and post the ownership of the pole by
marking S for SWBT or P for Power Company based on SWBT's records.

Street Address:  Applicant will provide street address or geographical 
reference point of the pole.

Proposed Attachment Height:  Applicant will provide the proposed attachment 
height in feet and inches on the pole.

Guy Rq'd:  Not required for Provisional, Records Based assignment.

Make Ready Work:  Not required for Provisional, Records Based assignment.

Make Ready Description:  Not required for Provisional, Records Based assignment.

Pole Mntd Apparatus Height:  Not required for Provisional, Records Based 
assignment.

Weight/per ft. and Size/O.D.:  Applicant will provide.

Number and Types of Strands:  Applicant will provide the number and types of 
strands.

Other Notes:  Any other notes relevant to the request including any infrequent 
construction techniques.

Date:  The date the Provisional, Records Based Assignment was made.

Time:  The time the Provisional, Records Based Assignment was made.

Signed  (Applicant's  Representative):  Applicant's  Representative  signs 
that the Provisional, Records Based Assignment was made.

Signed (SWBT Representative):  SWBT's Representative signs that the Provisional,
Records Based Assignment was made.


<PAGE>   398


REQUIRED INFORMATION FOR PRE-OCCUPANCY SURVEY

FIRM'S NAME: Name of firm requesting pole attachment space.

AGREEMENT No.:  Number obtained from the Master Agreement Number.

APPLICATION No.:  Will be provided by SWBT.

[ ] Pre-Occupancy Survey: This would be checked when this form is being used as
a Pre-Occupancy Survey. The form would be completed in its entirety and signed
by the applicant and submitted to SWBT for review in obtaining pole attachment
space.

Type: The applicant states that they are a CATV, a Telecommunications Carrier or
a firm other than the aforementioned two.

Record #: The SWBT paper record or mechanized record number.

Pole #: Applicant will supply the pole number either from the SWBT Records or
from a field visit.

Ownership:  Applicant  will  determine  and  post the  ownership  of the pole by
marking S for SWBT or P for Power Company.

Street Address:  Applicant will provide street address or geographical reference
point of the pole.

Proposed  Attachment  Height:  Applicant  will provide the  proposed  attachment
height in feet and inches on the pole.

Guy Rq'd:  Applicant will state if a guy is required. (Yes or No).

Make Ready Work:  Applicant  will state if make ready work is required.  (Yes or
No).

Make  Ready  Description:  Applicant  will give  description  of make  ready 
work required.

Pole Mntd Apparatus  Height:  Applicant  will state any proposed  apparatus that
would be placed on the pole. (Terminal, etc.)

Number of Cables:  Applicant will state the number of cables that will be placed
on the pole.

Weight/per ft. and Size/O.D.: Applicant will provide.

Number and Types of  Strands:  Applicant  will  provide  the number and types of
strands.

Other Notes:  Any other notes  relevant to the request  including any infrequent
construction techniques.

Date:  The date the Pre-Occupancy Survey was submitted to SWBT.

Time:  The time the Pre-Occupancy Survey was submitted to SWBT.

Signed  (Applicant's  Representative):  Applicant's  Representative  signs  when
Pre-Occupancy Survey was submitted to SWBT.

Signed (SWBT  Representative):  SWBT's  Representative  signs when Pre-Occupancy
Survey was submitted to SWBT.




<PAGE>   399



<TABLE>
<S><C>

[LOGO] Southwestern Bell Telephone                     Access Application and Make-Ready Authorization

Retention Period: Active, plus 5 years                   (Request for Access to Poles, Ducts, Conduit)

Name of Applicant ______________________________________________________________
Agreement No. __________________________________________________________________
Application No. ________________________________________________________________


                             Provisional Assignment

As specified in the attached documents, and in accordance with the terms and
conditions of the Master Agreement between SWBT and Applicant, application is
hereby made for a provisional assignment of space in anticipation of a
nonexclusive license of communication facilities to access the quantity of SWBT
facilities indicated below:

     ______  SWBT poles                _____  Feet SWBT Whole Duct         _______  Feet SWBT Innerduct

Applicant desires immediate assignment of space and acknowledges that the
effective date is ____________________. Applicant agrees to provide an
application for assignment/access/occupancy of the assigned space within 30 days
from the date of the assignment, or forfeit the assignment.
         Expiration Date: ___________________



                           Assignment/Access/Occupancy


As specified in the attached documents, and in accordance with the terms and
conditions of the Master Agreement between SWBT and Applicant, application is
hereby made for occupancy of space through a nonexclusive license of
communication facilities to access the quantity of SWBT facilities indicated
below:


     ______  SWBT poles                ______  Feet SWBT Whole Duct           _______  Feet SWBT Innerduct

Applicant authorizes SWBT to perform the required pre-licensing survey
including any field inspections required to evaluate capacity, safety,
reliability, and engineering standards; and to determine the cost, if any, of
required modifications or make-ready work.
         Expiration Date: _____________________


Applicant's Estimated Construction Start Date: ________________________
Applicant's Estimated Construction Completion Date: ___________________
                         Authorized by Applicant: __________________________________________
                                                  Signature                           Title
                         Date: ____________________________

                                                  Make-Ready Work
         Estimated Costs                                      Hours                   Rate              Total
                  Constr. Labor                                ____        x     $___________     $_____________
                  Material                                     XXX         x     $  XXX           $_____________
                  Engr. Design                                 ____               ___________     $_____________ 
                                   Total                       ____        x     $___________     $_____________ 
                                   

Estimated SWBT Completion Date

/  /    No Make-Ready Work Required                      /  /  No Make-Ready Work Required under 8.03(a)

/  /    Make-Ready Work will be completed by applicant's authorized contractor.

/  /    I authorize SWBT to complete the required make-ready work.  Payments due upon 50% completion and 100%
        completion.  Costs will be based upon actual costs incurred by SWBT.  (This may vary depending on state)

___________________________________________________                              Date: _____________________________
Applicant's Signature                           Title

License No. __________________                          Authorized by SWBT: _________________________________
Date: _________________________                                                 Signature              Title

                                                     /  /    Official File Copy, If Checked In Red

</TABLE>
<PAGE>   400
                                     SW-9434
                 ACCESS APPLICATION AND MAKE-READY AUTHORIZATION
                                FORM INSTRUCTIONS
                                     5/5/97

Form SW-9434 is used to request access to poles, ducts, and conduit; to transmit
notice of Provisional Assignments; and to provide other information required in
the access process.

REQUIRED INFORMATION

NAME OF APPLICANT. Name of firm requesting space on poles or in conduit.

AGREEMENT NO.  Number obtained from the Master Agreement Number.

APPLICATION NO.  Will be provided by applicant in sequential ascending order.

PROVISIONAL ASSIGNMENT BOX DATA

         "ATTACHED DOCUMENTS" Copies of the Assignment Of Space Logs showing the
         applicant's entries for the requested space or completed Forms SW-9433
         or SW-9435 if appropriate. Assignment is not official until the
         required data is entered in the Assignment Of Space Log.

                _____ SWBT POLES The number of poles for which space is
                      requested.

                _____ FEET SWBT WHOLE DUCT The accumulated Center-to-Center
                      measurements for the Whole Duct to be occupied. To be used
                      ONLY FOR CABLES TOO LARGE IN DIAMETER (Typically copper
                      conductor cables.) to fit in SWBT standard innerduct

                _____ FEET SWBT INNERDUCT The accumulated Center-to-Center
                      measurements for the innerduct to be occupied.

         EFFECTIVE DATE IS date entered in Assignment Of Space Log

         PROVISIONAL ASSIGNMENT EXPIRATION DATE:  30 calendar days from the date
              entered in the Assignment of Space Log (i.e., Date Application
              must be submitted to hold the assignment of space.)

ASSIGNMENT/ACCESS/OCCUPANCY BOX DATA

         "ATTACHED DOCUMENTS"  Completed Forms SW-9433 and/or SW-9435.

                _____ SWBT POLES The number of poles to be accessed.

                _____ FEET SWBT WHOLE DUCT The accumulated Center-to-Center
                      measurements for the Whole Duct to be occupied. To be used
                      ONLY FOR CABLES TOO LARGE IN DIAMETER (Typically copper
                      conductor cables.) to fit in SWBT standard innerduct

                _____ FEET SWBT INNERDUCT The accumulated Center-to-Center
                      measurements for the innerduct to be occupied.

         EFFECTIVE DATE IS date entered in Assignment Of Space Log

         ASSIGNMENT EXPIRATION DATE: 12 Months from the date entered in
            Assignment Of Space Log (Date facilities must be placed to avoid
            forfeiture of assigned space.)


                                     PAGE 1
<PAGE>   401
                                     SW-9434
                   ACCESS APPLICATION AND MAKE-READY AUTHORIZATION
                                FORM INSTRUCTIONS
                                     5/5/97

APPLICANT'S ESTIMATED CONSTRUCTION START DATE: Current "best estimate" of the
date project construction will begin. "ASAP" IS NOT AN ACCEPTABLE DATE.

APPLICANT'S ESTIMATED CONSTRUCTION COMPLETION DATE: Current "best estimate" of
the date placements and splicing will be completed. "ASAP" IS NOT AN ACCEPTABLE
DATE.

AUTHORIZED BY APPLICANT: Signature and Title of the Applicant's representative
         authorizing the request for access and payment (if any) of related SWBT
         engineering charges in connection with such access.

DATE:    Date of authorization by Applicant's representative.

MAKE-READY WORK BOX DATA

         ESTIMATED COSTS: SWBT will calculate data for Construction Labor,
         Material, and Engineering Design hours and summarize the TOTAL
         estimated SWBT Make-Ready Costs.

         ESTIMATED SWBT COMPLETION DATE: SWBT Engineering will provide the
         estimated completion date of SWBT Make-Ready Work based upon current
         scheduling loads.

         [ ] NO MAKE-READY WORK REQUIRED. Applicant should check this box if it
         has determined that fully code/specifications-compliant access can be
         granted without any work or modifications by SWBT or other parties. If
         inner duct must be placed, box should not be checked.

         [ ] MAKE-READY WORK WILL BE COMPLETED BY APPLICANT'S AUTHORIZED
         CONTRACTOR. If Applicant plans to utilize a mutually approved
         authorized contractor to perform ALL the Make-Ready work, this box only
         should be checked.

         [ ] I AUTHORIZE SWBT TO COMPLETE THE REQUIRED MAKE-READY WORK.... If
         Applicant wants SWBT to perform all the Make-Ready Work, this box only
         should be checked.

         IF SOME MAKE-READY WORK MUST BE DONE BY SWBT AND SOME WILL BE DONE BY
         THE APPLICANT'S AUTHORIZED CONTRACTOR, THE LAST TWO BOXES SHOULD BE
         CHECKED. A DETAILED DESCRIPTION OF THE WORK TO BE DONE BY SWBT MUST BE
         INCLUDED.

         APPLICANT'S SIGNATURE, TITLE AND DATE:

                  If the No Make-Ready Work Required box is checked by
                  Applicant, Applicant's Signature confirms the accuracy of the
                  current Applicant construction schedule. If the Not Make-Ready
                  Work Required under 8.03(a) box is checked, Applicant confirms
                  conditions under 8.03 Immediate Occupancy apply.

                  If Make-Ready Work will be completed by Applicant's Authorized
                  contractor is checked, Applicant's signature concurs with any
                  changes in proposed Make-Ready work identified by SWBT and
                  confirms the accuracy of the current schedule.

                  If SWBT will perform any Make-Ready Work, Applicant's
                  signature authorizes payment to SWBT of actual cost to perform
                  the required make-ready work.

LICENSE NO. ______ AUTHORIZED BY SWBT: The SWBT State ULS will authorize, date,
         and issue the License No. on the SW-9434 which becomes the Applicant's
         License For Access.



                                    PAGE 2
<PAGE>   402
<TABLE>
<S><C>
[LOGO] Southwestern Bell Telephone
Retention Period:  Active, Plus 5 Years                                   Conduit Occupancy                      PAGE ___ OF ____
FIRM'S NAME: ____________________________                      [ ] Provisional, Records Based Assignment
AGREEMENT NO.: __________________________                                [ ] Pre-Occupancy Survey                 TYPE: __________
APPLICATION NO.: ________________________
                                                                                                              (CATV, Telecom, Other)
ITEM OPER. RECORD MANHOLE     STREET        DISTANCE TO   PROPOSED    MAKE READY        MAKE READY
 #    #       #     #         ADDRESS       NEXT MANHOLE   DUCT OR      WORK            DESCRIPTION
 1                                          (CTR TO CTR)  INNERDUCT    Y OR N
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
16
17
18
19
20
TOTAL
         NUMBER OF CABLES ___________________           SPLICE INFORMATION MANHOLE  # ___________________, DETAILS ________________

         SIZE OF CABLE (O.D. INCHES) ______________     SPLICE INFORMATION MANHOLE  # ____________________, DETAILS ________________

                                                        SLACK LOOP INFO. MANHOLE  # ____________________, DETAILS ________________

                                                        SLACK LOOP INFO. MANHOLE  # ____________________, DETAILS ________________

                                                     Date: _____________
                                                                         
                                                     Time: _____________
SIGNED: ____________________________________                                 SIGNED: _________________________________
              SWBT Representative                                                      Applicant's Representative

                                            / / Official File Copy, If Checked in Red

                                                                                                                          SW-9435
</TABLE>

<PAGE>   403
                                    SW9435
                              CONDUIT OCCUPANCY
                              FORM INSTRUCTIONS

From SW9435 may be used for the following two purposes, Provisional, Records
Based Assignment or as the Pre-Occupancy Survey. The applicant may complete the
SW9435 and submit this to SWBT while reviewing the records and make a
Provisional, Records Based Assignment. The applicant will also use this form
when making the Pre-Occupancy Survey as a reference sheet of information
required for acquiring duct and/or inner duct space. 

REQUIRED INFORMATION FOR PROVISIONAL, RECORDS BASED ASSIGNMENT

FIRM'S NAME:  Name of firm requesting conduit space.

AGREEMENT No.: Number obtained from the Master Agreement Number.

APPLICATION No. Will be provided by applicant in sequential ascending order.

[ ] Provisional, Records Based Assignment: Applicable when an applicant would
make a Provisional, Records Based Assignment. The form will be signed and dated
at the bottom by both the applicant and the SWBT representative. A copy will be
provided to the applicant and the original will be maintained by SWBT.

Type: Applicant indicates that they are a CATV, a Telecommunications Carrier or
a firm other than the aforementioned two.

Record #: This would refer to either the SWBT paper record or the SWBT
mechanized record number.

Manhole #: Applicant will supply each manhole number.

Street Address: Applicant will provide street address of the manhole, if 
applicable.

Proposed Duct or Inner duct: Applicant will state the number of ducts and/or
inner ducts.

Make Ready Work:  Not required for Provisional, Records Based assignment.

Make Ready Description:  Not required for Provisional, Records Based assignment.

Number of Cables:  Applicant will enter the number of cables.

Size of Cable (O.D. Inches): Applicant will enter size of cable.

Splice Information Manhole #: Not required for Provisional, Records Based
assignment. 

Details: Not required for Provisional, Records Based assignment.

Slack Loop Info. Manhole #: Not required for Provisional, Records Based
assignment.

Details:  Not required for Provisional, Records Based assignment.

Date:  The date the Provisional, Records Based Assignment was made.

Time:  The time the Provisional, Records Based Assignment was made.

Signed (Applicant's Representative): Applicant's Representative signs that the
Provisional, Records Based Assignment was made.

Signed (SWBT Representative): SWBT's Representative signs that the Provisional,
Records Based Assignment was made.

<PAGE>   404

REQUIRED INFORMATION FOR PRE-OCCUPANCY SURVEY

FIRM'S NAME:  Name of firm requesting conduit space.

AGREEMENT No.:  Number obtained from the Master Agreement Number.

APPLICATION No.: Will be provided by applicant in sequential ascending order.

[ ] Pre-Occupancy Survey: Applicable when this form is being used as a 
Pre-Occupancy Survey. The form would be completed in its entirety by the 
applicant and submitted to SWBT for review in obtaining conduit space.

Type: Applicant indicates that they are a CATV, a Telecommunications Carrier or
a firm other than the aforementioned two.

Oper. #: Applicant will provide the operation number when required. The same
operation number may very well be referenced on an attached map.

Record #: This would refer to either the SWBT paper record or the SWBT
mechanized record number.

Manhole #: Applicant will supply each manhole number.

Street Address: Applicant will provide street address of the manhole, if
applicable.

Distance to Manhole: Applicant will state the distance from manhole to manhole
in feet.

Proposed Duct or Inner duct: Applicant will state the number of ducts and/or
inner ducts.

Make Ready Work: Applicant will state if make ready work is required. 
(Yes or No)

Make Ready Description: Applicant will give description of make ready work
required.

Number of Cables:  Applicant will indicate the number of cables.

Size of Cable (O.D. Inches): Applicant will indicate size of cable.

Splice Information Manhole #: Applicant will enter any relevant splice
information.

Details: Applicant will provide any relevant details regarding splice
information.

Slack Loop Info. Manhole #:  Applicant will provide.

Details:  Applicant will provide any relevant Slack Loop Information.

Date:  The date the Pre-Occupancy Survey was submitted to SWBT.

Time:  The time the Pre-Occupancy Survey was submitted to SWBT.

Signed (Applicant's Representative): Applicant's Representative signs when
Pre-Occupancy Survey was submitted to SWBT.

Signed (SWBT Representative): SWBT's Representative signs when Pre-Occupancy
Survey was submitted to SWBT.

<PAGE>   405
[LOGO]
SOUTHWESTERN BELL                                                       SW-9436A
TELEPHONE                                                            (Rev. 5-89)
                                                             Ref:  002-011-900SW

                    NOTIFICATION OF SURRENDER OR MODIFICATION
                     OF POLE ATTACHMENT LICENSE BY LICENSEE

                                                              Page ____ of _____

                                          Agreement Number _____________________

                                           _____________________________________
                                          (Licensee) 
                                           _____________________________________
                                          (Address)
                                           _____________________________________


SOUTHWESTERN BELL TELEPHONE COMPANY:

In accordance with the terms and conditions of the License Agreement between us,
dated ________, 19__, notice is hereby given that the licenses covering
attachments to the following poles and/or anchors and/or utilization of
anchor/guy strand is surrendered (or modified as indicated in Licensee's prior
notification to Licensor, dated ___________________, 19___,) effective
_______________________.
        
       
<TABLE>
<CAPTION>
                                                                                                                         DATE FAC.
                               ANCHOR A/GS                                                                               RMVD. OR
        POLE NO.            (ASSOC. POLE NO.)        LIC. NO. & DATE          SURRENDEER OR MODIFICATION                 MODIFIED
<S>                        <C>                      <C>                      <C>                                        <C>
 1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15

Date Notification Received _____________________
                                                                              _____________________________________________________
Date Modification Accepted _____________________                                                    Name of Licensee
By _____________________________________________
Discontinued:                                                                 By   ________________________________________________
                           Poles _______________                              Title _______________________________________________
                  Anchors ______________________
         Anchor/Guy Strands ____________________

</TABLE>
REF: 002-011-900SW                                                     
                                                                     


<PAGE>   406
[LOGO]
SOUTHWESTERN BELL
Telephone

                                       NOTIFICATION OF SURRENDER OR MODIFICATION
                                       OF CONDUIT OCCUPANCY LICENSE BY APPLICANT

                                                              Page ____ of _____

License Agreement #  ______________
                                       _________________________________________
                                      (Applicant)
                                       _________________________________________
                                      (Address)
                                       _________________________________________


SOUTHWESTERN BELL TELEPHONE COMPANY:

In accordance with the terms and conditions of the Licensing Agreement between
us, dated ________, 19__, notice is hereby given that the licenses covering
occupancy of the following conduit are surrendered (or modified as indicated in
Applicant's prior notification to SWBT, dated ___________________, 19___,)
effective _________.
        
<TABLE>
<CAPTION>                                                                                                            DATE
                                                                                                                 FAC. RMVD. OR
        CONDUIT LOCATION                 LIC. NO. & DATE                SURRENDER OR MODIFICATION                 MODIFIED
<S>                                    <C>                            <C>                                   <C> 
 1
 2
 3
 4
 5
 6
 7
 8
 9 
10
11
12
13
14
15

                 Date Notification Received _____________________                      ______________________________________
       S         Date Modification Accepted _____________________                                (Applicant)
       W         By _____________________________________________
       B         Discontinued: __________________________________                     By  ___________________________________
       T                                                                                     (Name of Authorized Agent)

                                   Total duct footage ___________                       Title  _____________________________
                                                                                             (Title of Authorized Agent)
</TABLE>

Ref: 002-011-900SW                                                     SW-9436B
                                                                     (Rev. 6-96)
<PAGE>   407
[LOGO]
SOUTHWESTERN BELL
Telephone

                                                    NOTIFICATION OF UNAUTHORIZED
                                                        ATTACHMENTS BY APPLICANT

Applicant Name ________________________________

In accordance with the terms and conditions of the License Agreement between us,
dated _____, 19__, notice is hereby given that the license covering 
attachments to the following is unauthorized (as indicated in Applicant's prior
agreement to SWBT, dated ______________________, 19___,) effective
____________________.
        
        
                                                     SOUTHWESTERN BELL TELEPHONE

                                                     By: _______________________

                                                     Title: ____________________

<TABLE>
<CAPTION>
      
   POLE NO.          LOCATION                                                        DATE FAC.
     OR          (ASSOC. POLE NO.)                                                   RMVD. OR
   CONDUIT #      MANHOLES involved   LIC. NO. & DATE    UNAUTHORIZED ATTACHMENT     MODIFIED
<S>              <C>                 <C>                <C>                         <C>
 1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15

                                               _________________________________                      
SKETCH OF                                               NAME OF APPLICANT
UNAUTHORIZED
ATTACHMENTS      / /                           BY  _____________________________
ATTACHED

DATE NOTIFICATION                              TITLE  __________________________
SENT ____________________
</TABLE>

REF: SW002-011-900                                                     SW-9436C
                                                                     (Rev. 6-96)

<PAGE>   408
                                                       Agreement No. __________

                                  APPENDIX IV
                INSURANCE REQUIREMENTS (ARKANSAS) -- PAGE 1 OF 4


         This Appendix IV is an integral part of the Master Agreement for Access
to Poles, Ducts, Conduits, and Rights-of-Way to which it is attached.

         1) Premises. As used in this Appendix, the term "premises" refers to
any site located on, within, or in the vicinity of SWBT's poles, ducts,
conduits, or rights-of-way and any location where Applicant or any person acting
on Applicant's behalf may be physically present while traveling to or departing
from any such site.

         2) Requirements Applicable to Applicant and All Persons and Entities
Acting on Applicant's Behalf. Applicant shall maintain, at all times during the
term of this Master Agreement, all insurance and coverages set forth below. Such
insurance and coverages shall not only cover Applicant but all contractors,
subcontractors, and other persons or entities acting on Applicant's behalf at
the premises described in 1) above. Applicant should require that all
contractors, subcontractors, and other persons or entities acting on Applicant's
behalf at premises described in 1) above obtain the same insurance and
coverages.

         3) Workers' Compensation Insurance. Applicant shall maintain, at all
times during the term of this Agreement, Workers' Compensation Insurance and
Employer's Liability Insurance with minimum limits of $100,000 for bodily
injury-each accident, $100,000 for bodily injury by disease-each employee, and
$500,000 for bodily injury by disease-policy limits, for all employees
performing work or otherwise present on the premises described in 1) above. Such
insurance must comply with the Workers' Compensation laws of this State and
shall provide coverage, at a minimum, for all benefits required by such Worker's
Compensation laws. Applicant shall require any contractor, subcontractor, or
other person or entity acting on Applicant's behalf to provide Workers'
Compensation Insurance and Employer's Liability Insurance for their respective
employees unless such employees are covered by the protection afforded by
Applicant.

         4) General Liability Insurance. To protect SWBT and any joint user from
any liability for bodily injury or property damage, Applicant shall maintain, at
all times during the term of this Agreement, General Liability insurance
satisfactory to SWBT. SWBT shall be added as an additional insured in the
standard policy or an endorsement thereto. Applicant shall also require any
contractor, subcontractor, or other person or entity acting on Applicant's
behalf to provide General Liability coverage with the same limits and with SWBT
added as an additional insured unless such contractor, subcontractor, or other
person or entity is covered by the General Liability protection afforded by
Applicant.

                a)  The following coverages must be included in (and may not be
                    excluded from) the policy or policies obtained to satisfy
                    the General Liability insurance requirements of Applicant
                    and any contractor, subcontractor, or other person or entity
                    acting on Applicant's behalf. The coverages may be provided
                    by the standard policy or endorsements thereto. Exclusion
                    endorsements deleting these coverages will not be accepted.


<PAGE>   409

                                  APPENDIX IV
                INSURANCE REQUIREMENTS (ARKANSAS) -- PAGE 2 OF 4

                    1)     Personal Injury and Advertising Injury coverage.

                    2)     Premises/Operations coverage, including also coverage
                           for any newly acquired ownership or controlled
                           premises or operations.

                    3)     Independent Contractors coverage to provide
                           protection for Applicant's contractors,
                           subcontractors, and other persons or entities acting
                           on Applicant's behalf.

                    4)     Explosion, Collapse, and Underground Hazard (XCU) 
                           coverage.

                    5)     Completed Operations coverage providing for bodily
                           injury and property damage liabilities which may
                           occur once the operations have been completed or
                           abandoned.

                    6)     Contractual Liability coverage to provide financial
                           responsibility for the Applicant to meet its
                           indemnification obligations.

                    7)     Broad Form Property Damage (BFPD) coverage for damage
                           to property in the care or custody of Applicant and
                           damage to work performed by or on behalf of the
                           Applicant.

                b)  Minimum policy limits shall be as follows:

                    General Aggregate Limit: $1,000,000.

                    Sublimit for all bodily injury, property damages, or medical
                    expenses incurred in any one occurrence: $1,000,000.

                    Sublimit for personal injury and advertising: $1,000,000.

                    Products/Operations Aggregate Limit: $1,000,000.

                    Each occurrence sublimit for Products/Operations: 
                    $1,000,000.

                c)  No coverage shall be deleted from the standard policy
                    without notification of individual exclusions being attached
                    for review and acceptance.

                d)  Policy language or endorsements adding SWBT as an additional
                    insured shall not include exclusions or exceptions which
                    defeat the purpose of protecting SWBT

<PAGE>   410
                                  APPENDIX IV
                INSURANCE REQUIREMENTS (ARKANSAS) -- PAGE 3 OF 4


                    from any liability for bodily injury or property damage 
                    arising out of Applicant's operations.

         5) Automobile Liability insurance. The parties contemplate that
Applicant and personnel acting on Applicant's behalf will utilize automobiles,
trucks, and other motor vehicles on public and private property, including
public rights of way, in the vicinity of SWBT's poles, ducts, conduits, and
rights-of-way. Accordingly, Applicant shall maintain, at all times during the
term of this Agreement, Automobile Liability insurance with minimum limits of
$1,000,000 combined single limits per occurrence for bodily injury and property
damage which may arise out of the operation or use of motor vehicles of any
type. Coverage shall extend to "any auto" -- that is, coverage shall be extended
to all owned, non-owned, and hired vehicles used by Applicant or by any person
or entity acting on Applicant's behalf in connection with any work performed, or
to be performed, on, within, or in the vicinity of SWBT's poles, ducts,
conduits, or rights-of-way.

         6) Layering of General Liability and Automobile Liability coverages.
Applicant's insurance may be written via a primary policy with either an excess
or umbrella form over the primary policy. If coverage is written in this manner,
the total of the combined policy limits must meet or exceed the minimum limits
specified in this Agreement.

         7) Deductibles.  No deductibles shall be allowed without the express
written consent of SWBT.

         8) Claims Made Policies.  Claims Made Policies will not be accepted.

         9) Proof of Insurance. Certificates of Insurance stating the types
of insurance and policy limits provided the insured, or other proof of insurance
satisfactory to SWBT, must be received by SWBT prior to the issuance of any
licenses pursuant to this Agreement and before Applicant or any person acting on
Applicant's behalf performs any work on the premises described in 1) above.

                a)  Certificates of Insurance using the insurance industry
                    standard ACORD form are preferred.

                b)  Certificates provided with respect to General Liability
                    policies and certificates provided with respect to
                    Automobile Liability policies shall indicate SWBT as an
                    Additional Insured.

                c)  Deductibles, if permitted, shall be listed on the 
                    Certificate of Insurance.

                d)  The cancellation clause on the certificate of insurance 
                    shall be amended to read as follows:



<PAGE>   411
                                  APPENDIX IV
                INSURANCE REQUIREMENTS (ARKANSAS) -- PAGE 4 OF 4


                           "SHOULD ANY OF THE ABOVE DESCRIBED POLICIES BE
                           CANCELLED OR MATERIALLY CHANGED BEFORE THE EXPIRATION
                           DATE, THE ISSUING COMPANY WILL MAIL 30 DAYS WRITTEN
                           NOTICE TO THE CERTIFICATE HOLDER NAMED TO THE LEFT."

                    A certificate which does not include the phrase "or
                    materially changed" does not meet SWBT's requirements. A
                    certificate reciting that the issuing company will "endeavor
                    to" mail 30 days written notice to the certificate holder
                    does not meet SWBT's requirements. The language "but failure
                    to mail such notice shall impose no obligation or liability
                    of any kind upon the company, its agents, or
                    representatives" or similar language must be deleted from
                    the certificate.

                e)  The certificate holder shall be:

                    Southwestern Bell Telephone Company
                    1111 W. Capitol, Room 525
                    Little Rock, Arkansas 72201
                           ATTENTION: Utility Liaison Supervisor

                f)  Failure to object to any coverage described in a certificate
                    shall not constitute written permission from SWBT to any
                    variance from or alteration of any requirement set forth in
                    this Appendix and shall not be construed as a waiver by SWBT
                    of any rights under this Agreement.

         10) Rating of Insurers. SWBT requires that companies affording
insurance coverage have a B+VII or better rating, as rated in the current A.M.
Best Key Rating Guide for Property and Casualty Insurance Companies.

         11) Self-insurance. If authorized in the Master Agreement,
self-insurance shall be allowed in lieu of the above requirements upon
Applicant's submission of proof that it has met the self-insurance requirements
stated in the Master Agreement.


<PAGE>   412
                                                       Agreement No. __________

                                  APPENDIX V
                NONDISCLOSURE AGREEMENT (ARKANSAS) -- PAGE 1 OF 4


      Nondisclosure Agreement (SWBT Pole, Duct, Conduit, and Right-of-Way)

         This Nondisclosure Agreement, effective as of the ___ day of
_______________, 19__, has been entered into by and between Southwestern Bell
Telephone Company ("SWBT"), a Missouri corporation, and the undersigned person
or firm ("Recipient") as a condition of access to certain records and
information maintained by SWBT. The parties stipulate and agree as follows:

         1) SWBT maintains records and information, including but not limited to
outside plant engineering and construction records, which relate to poles,
ducts, conduits, and rights-of-way which SWBT owns or controls. SWBT represents
that such records and information are not made generally available for
inspection or copying by the public and include business, economic, and
engineering information (including but not limited to plans, designs, maps,
diagrams, cable counts and cable-specific information, circuit records, and
other competitively sensitive information) which SWBT intends to keep secret and
which has economic value by virtue of not being generally known to or readily
ascertainable by the public, including SWBT's competitors.

         2) SWBT has agreed to make certain of its records and information
relating to poles, ducts, conduits, and rights-of-way available to cable
television systems and telecommunications carriers who are presently entitled
under federal law to have access to the poles, ducts, conduits, and
rights-of-way owned or controlled by SWBT.

         3) Recipient represents that Recipient is a cable television system or
telecommunications carrier entitled under federal law to access to poles, ducts,
conduits, and rights-of-way owned or controlled by SWBT, or, if an individual,
that he or she is acting on behalf of _________________________________________,
which is such a cable television system or telecommunications carrier. Recipient
further represents that Recipient is seeking access to SWBT's records and
information relating to poles, ducts, conduits, and rights-of-way for the
limited purpose of enabling engineering and construction personnel employed by
or acting on behalf of such cable television system or telecommunications
carrier to make engineering and construction decisions necessary to utilize
SWBT's poles, ducts, conduits, and rights-of-way.

         4) SWBT agrees that permitted uses of records and information
concerning SWBT's poles, ducts, conduits, and rights-of-way are (a) determining
which poles, ducts, conduits, and rights-of-way owned or controlled by SWBT are
available for use by such cable television systems or telecommunications
carriers as permitted by federal law, (b) designing, engineering, constructing,
installing, maintaining, and removing equipment which is to be attached to or
placed within such poles, ducts, conduits, and rights-of-way, and (c) contesting
decisions, if any, by SWBT not to provide access to such poles, ducts, conduits,
and rights-of-

<PAGE>   413
                                  APPENDIX V
                NONDISCLOSURE AGREEMENT (ARKANSAS) -- PAGE 2 OF 4


way as requested. No other uses of such records or information are authorized or
permitted under this Agreement.

         5) Recipient agrees that Recipient will not use, or permit any other
person or entity to use or have access to SWBT's records and information
relating to poles, ducts, conduits, or rights-of-way or information for any
purpose other than the limited purposes stated in 4) above and that such records
and information shall not be disclosed or shared with any person or persons
other than those who have a need to know such information for such limited
purposes. Recipient specifically agrees that such records and information shall
not be used or accessed by any person involved in sales, marketing, competitive
intelligence, competitive analysis, strategic planning, and similar activities.
Recipient further agrees that Recipient shall not furnish copies of such records
or disclose information contained in such records to any person or entity which
has not executed and delivered to SWBT a counterpart of this Agreement prior to
receipt of such copies or information.

         6) Recipient agrees that Recipient will not without SWBT's express
written authorization copy, duplicate, sketch, draw, photograph, download,
photocopy, scan, replicate, transmit, deliver, send, mail, communicate, or
convey any of SWBT's records relating to poles, ducts, conduits, or
rights-of-way. Recipient further agrees that Recipient will not conceal, alter,
or destroy any SWBT records furnished to Recipient pursuant to this Agreement.

         7) Notwithstanding the provisions of 6) above, and except as provided
in 8) below, Recipient may copy, take notes from, make, and use (for the limited
purposes specified herein) drawings with reference to the following records
provided by SWBT to Recipient for inspection: pole and conduit route maps, cable
plat maps, and plant location records reflecting approximate locations of SWBT's
existing poles, ducts, conduits, and rights-of-way. All such copies, notes, and
drawings (whether in hardcopy or electronic form) shall be marked with the
legend: "PROPRIETARY INFORMATION: NOT FOR USE BY OR DISCLOSURE TO ANY PERSON WHO
HAS NOT EXECUTED A NONDISCLOSURE AGREEMENT (SWBT POLE, DUCT, CONDUIT, AND
RIGHT-OF-WAY)."

         8) No references to cable counts, cable designations or cable-specific
information, circuit information, or customer-specific information of any kind
may be included in any copies, notes, or drawings made pursuant to 7) above;
provided, however, that Recipient may make estimates regarding the physical
characteristics (such as size and weight) of the cables being surveyed when
necessary to make engineering determinations regarding the capacity, safety,
reliability, or suitability of SWBT's poles, ducts, conduits, or rights-of-way
for Recipient/Applicant's intended uses.

<PAGE>   414
                                  APPENDIX V
                NONDISCLOSURE AGREEMENT (ARKANSAS) -- PAGE 3 OF 4


         9) All records and information relating to poles, ducts, conduits, and
rights-of-way provided to Recipient/Applicant by SWBT (whether in writing,
orally, or in electronic or other formats) shall be deemed to be proprietary
information subject to this Agreement without regard to whether such
information, at the time of disclosure, has been marked with restrictive
notations such as "Proprietary," "Restricted Proprietary," "Confidential," "Not
to Be Copied or Reproduced," or the like.

         10) This Agreement applies only to records and information provided to
Recipient by SWBT and does not apply to records and information obtained by
Recipient from other lawful sources.

         11) This Agreement does not prohibit the disclosure of records or
information in response to subpoenas and/or orders of a governmental agency or
court of competent jurisdiction. In the event Recipient receives an agency or
court subpoena requiring such disclosure, Recipient shall immediately, and in no
event later than five calendar days after receipt, notify SWBT in writing.

         12) The Parties agree that, in the event of a breach or threatened
breach of this Agreement, SWBT may seek any and all relief available in law or
in equity as a remedy for such breach, including but not limited to monetary
damages, specific performance, and injunctive relief. The Parties acknowledge
that SWBT's records and information relating to poles, ducts, conduits, and
rights-of-way include valuable and unique information and that disclosure of
such information (including circuit information) will result in irreparable
injury to SWBT. In the event of any breach of this Agreement for which legal or
equitable relief is sought, SWBT shall be entitled to recover from Recipient all
reasonable attorney's fees and other reasonable costs (including but not limited
to fees of expert witnesses) incurred by SWBT in connection with the prosecution
of its claims against Recipient.

         13) This Agreement shall be effective on the effective date shown above
and shall remain in full force and effect until terminated by either party as
provided herein. Either party may, at any time, with or without cause, terminate
this Agreement by giving the other party 60 days' advance written notice of its
decision to terminate. The parties further agree that termination of this
Agreement shall have no effect on the duty of any person or entity, including
Recipient, to abide by all terms of this Agreement with respect to records and
information received by Recipient while this Agreement is in effect.

         14) This Agreement shall benefit and be binding on the parties below
and their respective heirs, successors, and assigns.

         15) This Agreement will be governed by the laws of the State of
Arkansas.
<PAGE>   415
                                  APPENDIX V
                NONDISCLOSURE AGREEMENT (ARKANSAS) -- PAGE 4 OF 4


         16) This Agreement sets forth the entire agreement and understanding
between the parties with respect to the subject matter hereof, and none of the
terms of this Agreement may be amended or modified except by written instrument
signed by both parties.

         IN WITNESS WHEREOF, the parties hereto have executed this Agreement, or
caused this Agreement to be executed by their duly authorized representatives,
in duplicate, as of the dates set forth below.

____________________________________        Southwestern Bell Telephone Company
Recipient (Print or Type Name)


By _________________________________        By _________________________________
   Signature of Recipient                      Signature
   or Representative    

____________________________________        ____________________________________
Name (Printed or Typed)                     Name (Printed or Typed)

____________________________________        ____________________________________
Address                                     Address

____________________________________        ____________________________________
City, State, and Zip Code                   City, State, and Zip Code


____________________________________        ____________________________________
Phone                                       Phone


____________________________________        ____________________________________
Date                                        Date


<PAGE>   416
                                                       Agreement No. __________

                                  APPENDIX VI
                         NOTICES TO APPLICANT (ARKANSAS)


         This Appendix is an integral part of the Master Agreement for Access to
Poles, Ducts, Conduits, and Rights-of-Way to which it is attached.

         Notices in general. Except as otherwise stated in this Appendix, all
notices to Applicant shall be given to Applicant's duly authorized agent or
attorney as specified in Section 29.01 of the Master Agreement.

         Changes in notice requirements. Changes in the notice requirements set
forth in this Appendix may be made by Applicant from time to time in accordance
with the provisions of Section 29.03 of the Master Agreement.

         Special notice provisions. The following special notice provisions, if
any, shall apply:

<PAGE>   417
                                                       Agreement No. __________

                                  APPENDIX VII
                    NOTICES TO SWBT (ARKANSAS) -- PAGE 1 OF 3


         This Appendix is an integral part of the Master Agreement for Access to
Poles, Ducts, Conduits, and Rights-of-Way to which it is attached.

         Utility Liaison Supervisor (ULS). Except as otherwise stated in this
Appendix, all notices to SWBT shall be given to the Utility Liaison Supervisor
(ULS) designated in APPENDIX VIII of the Master Agreement. The Utility Liaison
Supervisor is generally responsible for coordinating applications for access to
SWBT's poles, ducts, conduits, and rights-of-way and serving as Applicant's
initial point of contact for matters arising out of or in connection with the
administration of the Master Agreement. Notices to the ULS shall be given in
writing in the manner prescribed in Section 29.02. Notices to be sent to the ULS
include, but are not limited to, notices under the following provisions of the
Master Agreement.

           7.01          Notification of Designation of Primary Point of Contact

           7.03(a)       Notification of intent to review records

           8.XX          All Notifications in Article 8

           9.XX          All Notifications in Article 9

          10.04(e)       Notification Regarding Make-Ready Work

          12.03(d)       Notification of placing J-hook on non-licensed pole

          12.04          Notification of occupation of maintenance duct for 
                         short-term use

          12.06          Notification of Applicant's maintenance contact

          13.01          Notification of planned modifications

          14.02(c)       Notification of Applicant's desire to add to or modify 
                         its existing attachment

          15.02(b)       Notification of occupation of maintenance duct for 
                         short-term emergency use

          15.03          Notification of emergency repair coordinators

          16.01          Notification that facilities have been brought into
                         compliance

          17.02(c)       Disclaimer of ownership or responsibility for untagged 
                         facilities

<PAGE>   418
                                  APPENDIX VII
                    NOTICES TO SWBT (ARKANSAS) -- PAGE 2 OF 3


          17.06          Notification of Applicant's response to ownership of 
                         facilities in question

          18.01(a)       Notice of intent to remove facilities

          18.01(e)       Notice of intent to terminate license

          18.06          Notification of completion of removal of facilities

          20.01(c)       Notification of change of bond

          21.17          Notification of claims

          23.XX          All notifications of insurance coverage in Article 23

          24.03          Notification of assignment

          25.01          Notification of termination

          25.03          Notification of cure of breach

          27.04          Notice of elective termination

          29.03          Notification of change in notice requirements

         Other notices. The following notices may be given orally or in writing
(including fax) and shall be given to SWBT's Local Service Provider Center
(LSPC) at 1-800-486-5598 instead of the ULS.

           6.05(a)       Notifications relating to electrical interference

           6.09(d)       Notifications of unsafe conditions

           6.11(a)       Notification of manhole entry

           6.13(c)       Notification of environmental contaminants

          10.02(b)       Notification of materials required for 
                         self-provisioning of inner duct

          15.04          Notification of conditions requiring emergency repair

<PAGE>   419
                                  APPENDIX VII
                    NOTICES TO SWBT (ARKANSAS) -- PAGE 3 OF 3


          15.06(a)       Notification of performing corrective work on emergency
                         repair. (advanced notice)

          15.06(b)       Notification of performing corrective work on emergency
                         repair. (no advanced notice)

         Additional information and questions concerning notice requirements.
The ULS, as Applicant's initial point of contact, will provide additional
information to Applicant concerning notification procedures for notices to be
given to LSPC. Questions to SWBT concerning notice requirements should be
directed to the ULS. The ULS is not authorized to provide Applicant legal advice
with respect to notice requirements. Questions by Applicant's personnel and
other persons acting on Applicant's behalf concerning Applicant's legal
obligations should be directed to Applicant's legal counsel or such other
personnel as Applicant may direct.

         Changes in notice requirements. Changes in the notice requirements set
forth in this Appendix may be made by SWBT from time to time in accordance with
the provisions of Section 29.03 of the Master Agreement.


<PAGE>   420
                                                       Agreement No. __________

                                  APPENDIX VIII
            IDENTIFICATION OF UTILITIY LIAISON SUPERVISOR (ARKANSAS)


         This Appendix is an integral part of the Master Agreement for Access to
Poles, Ducts, Conduits, and Rights-of-Way to which it is attached.

         The Utility Liaison Supervisor for Arkansas is named below. Notices to
the Utility Liaison Supervisor should be addressed as follow:

                    Name: Willena Slocum

                    Title: Utility Liaison Supervisor

                    Firm: Southwestern Bell Telephone Company

                    Address: 1111 W. Capitol, Room 525

                    City/State/Zip: Little Rock, Arkansas 72201


<PAGE>   1
                                                                   EXHIBIT 10.21

                                     INDEX


<TABLE>
                <S>                                      <C>
                SWBT/Digital Teleport, Inc. (Kansas)     Tab 1
                     800                                 Tab 2
                     911                                 Tab 3
                     AIN                                 Tab 4
                     BCR                                 Tab 5
                     CH                                  Tab 6
                     CNAM                                Tab 7
                     DCO                                 Tab 8
                     DA                                  Tab 9
                     FGA                                 Tab 10
                     HOST                                Tab 11
                     ITR                                 Tab 12
                     LIDB-AS                             Tab 13
                     LIDB-V                              Tab 14
                     MAP                                 Tab 15
                     OSS                                 Tab 16
                     OS                                  Tab 17
                     NIM/Physical Collocation Agreement  Tab 18
                     SS7                                 Tab 19
                     RECORDING                           Tab 20
                     RESALE                              Tab 21
                     UNE                                 Tab 22
                     WIRELESS                            Tab 23
                     WP                                  Tab 24
                     TP                                  Tab 25
                     PORT                                Tab 26
                     Poles, Ducts, Conduits & ROW        Tab 27
</TABLE>



<PAGE>   2

                                                    GENERAL TERMS AND CONDITIONS
                                                                    DTI - KANSAS


              INTERCONNECTION AGREEMENT UNDER SECTIONS 251 AND 252
                     OF THE TELECOMMUNICATIONS ACT OF 1996




                                 by and between



                      SOUTHWESTERN BELL TELEPHONE COMPANY



                                      and



                             DIGITAL TELEPORT, INC.



<PAGE>   3

                                                    GENERAL TERMS AND CONDITIONS
                                                                    DTI - KANSAS
                                                                     PAGE 1 OF 3


                               TABLE OF CONTENTS

<TABLE>
<S>  <C>                                                                                  <C>  
 1.0  DEFINITIONS........................................................................  1

 2.0  INTERPRETATION AND CONSTRUCTION....................................................  5

 3.0  IMPLEMENTATION SCHEDULE AND INTERCONNECTION ACTIVATION DATES.......................  5

 4.0  INTERCONNECTION PURSUANT TO SECTION 251(c)(2)......................................  5
      4.1 Scope..........................................................................  6
      4.2 Interconnection Coverage.......................................................  6
      4.3 Methods for Interconnection....................................................  7
      4.4 Physical Architecture..........................................................  8
      4.5 Technical Specifications.......................................................  9
      4.6 Interconnection in Additional Metropolitan Exchange Areas......................  9

 5.0  TRANSMISSION AND ROUTING OF TELEPHONE EXCHANGE SERVICE TRAFFIC PURSUANT TO SECTION  
      251(c)(2).......................................................................... 10
      5.1 Scope of Traffic............................................................... 10
      5.2 Responsibilities of the Parties................................................ 10
      5.3 Reciprocal Compensation for Termination of Local Traffic ...................... 11
      5.4 Reciprocal Compensation for Transit Traffic ................................... 12
      5.5 Reciprocal Compensation for Termination of IntraLATA Interexchange
          Traffic........................................................................ 12
      5.6 Compensation for Origination and Termination of Switched Access Service Traffic 
          to or From an IXC (Meet-Point Billing (MPB) Arrangements)...................... 12
      5.7 Billing Arrangements for Compensation for Termination of IntraLATA, Local, 
          Transit, and Optional Calling Area Traffic..................................... 15
      5.8 Compensation for "Porting" Optional Calling Area Numbers....................... 16

 6.0  TRANSMISSION AND ROUTING OF EXCHANGE ACCESS TRAFFIC PURSUANT TO 251(c)(2).......... 16
      6.1 Scope of Traffic .............................................................. 16
      6.2 Trunk Group Architecture Traffic Routing....................................... 16

 7.0  TRANSPORT AND TERMINATION OF OTHER TYPES OF TRAFFIC ............................... 17
      7.1 Information Services Traffic .................................................. 17
      7.2 Line Status Verification (LSV)/Busy Line Interrupt (BLI) Traffic .............. 17
      7.3 Wireless Traffic............................................................... 17
 8.0  SIGNALING ......................................................................... 18
 9.0  NUMBERING ......................................................................... 18
10.0  RESALE -- SECTIONS 251(b)(1); 251(c)(4); 252(d)(3); and 271(c)(2)(B)(xiv).......... l9
</TABLE>



<PAGE>   4

                                                    GENERAL TERMS AND CONDITIONS
                                                                    DTI - KANSAS
                                                                     PAGE 2 OF 3


<TABLE>
<CAPTION>
<S>   <C>                                                                                <C>
11.0  UNBUNDLED NETWORK ELEMENTS - SECTIONS 251(c)(3), 271(c)(2)(B) 
      (ii),(iv),(v),(vi),(x) ............................................................ 20
12.0  NOTICE OF CHANGES -- SECTION 251(c)(5) ............................................ 20
13.0  COLLOCATION -- SECTION 251(c)(6) .................................................. 20
14.0  NUMBER PORTABILITY -- SECTIONS 251(b)(2) and 271(c)(2)(B)(xi)...................... 21
15.0  DIALING PARITY -- SECTION 251(b)(3); 271(c)(2)(B)(xii); and 271(e)(2).............. 21
16.0  ACCESS TO RIGHTS-OF-WAY -- SECTION 251(b)(4) and 271 (c)(2)(B)(iii)................ 21
17.0  DATABASE ACCESS -- SECTION 271(c)(2)(B)(x) ........................................ 21
18.0  INTERCEPT REFERRAL ANNOUNCEMENTS................................................... 21
19.0  COORDINATED REPAIR CALLS .......................................................... 22
20.0  OTHER SERVICES 271 (c)(B)(2)(vii) and 271(c)(2)(B)(viii) .......................... 22
      20.1 White Pages .................................................................. 22
      20.2 Calling Name Information ..................................................... 22
      20.3 Billing/Collecting/Remitting ................................................. 23
      20.4 911/E911 Service ............................................................. 23
      20.5 Directory Assistance (DA) .................................................... 23
      20.6 Operator Services ............................................................ 23
      20.7 Clearinghouse Services ....................................................... 23
      20.8 Hosting ...................................................................... 23
      20.9 Signaling System 7 Interconnection ........................................... 23
21.0  GENERAL RESPONSIBILITIES OF THE PARTIES ........................................... 23
22.0  EFFECTIVE DATE, TERM, AND TERMINATION ............................................. 25
23.0  DISCLAIMER OF REPRESENTATIONS AND WARRANTIES ...................................... 26
24.0  CHANGES IN END USER LOCAL EXCHANGE SERVICE PROVIDER SELECTION ..................... 26
25.0  SEVERABILITY ...................................................................... 26
26.0  INTELLECTUAL PROPERTY ............................................................. 27
27.0  INDEMNIFICATION ................................................................... 27
</TABLE>


<PAGE>   5

                                                    GENERAL TERMS AND CONDITIONS
                                                                    DTI - KANSAS
                                                                     PAGE 3 OF 3


<TABLE>
<S>   <C>                                                                                 <C>
28.0  LIMITATION OF LIABILITY ........................................................... 29



29.0  LIQUIDATED DAMAGES FOR SPECIFIED ACTIVITIES ....................................... 29
      29.1 Certain Definitions .......................................................... 29
      29.2 Specified Performance Breach ................................................. 30
      29.3 Liquidated Damages ........................................................... 30
      29.4 Limitations .................................................................. 30
      29.5 Sole Remedy .................................................................. 31
      29.6 Records ...................................................................... 31
30.0  REGULATORY APPROVAL ............................................................... 31
31.0  MISCELLANEOUS...................................................................... 31
      31.1  Authorization................................................................ 31
      31.2  Compliance and Certification................................................. 32
      31.3  Law Enforcement.............................................................. 32
      31.4  Independent Contractor....................................................... 33
      31.5  Force Majeure................................................................ 33
      31.6  Confidentiality.............................................................. 33
      31.7  Governing Law................................................................ 35
      31.8  Taxes........................................................................ 35
      31.9  Non-Assignment............................................................... 36
      31.10 Non-Waiver................................................................... 37
      31.11 Audits....................................................................... 37
      31.12 Disputed Amounts............................................................. 37
      31.13 Disputed Resolutions......................................................... 38
      31.14 Notices...................................................................... 38
      31.15 Publicity and Use of Trademarks or Service Marks............................. 39
      31.16 Section 252(i) Obligations................................................... 39
      31.17 Joint Work Product........................................................... 40
      31.18 Intervening Law.............................................................. 40
      31.19 No Third Party Beneficiaries; Disclaimer of Agency........................... 40
      31.20 No License................................................................... 41
      31.21 Survival..................................................................... 41
      31.23 Scope of Agreement........................................................... 41
      31.24 Entire Agreement............................................................. 41
</TABLE>


<PAGE>   6


                                                    GENERAL TERMS AND CONDITIONS
                                                                    DTI - KANSAS
                                                                    PAGE 1 OF 42



          INTERCONNECTION AGREEMENT UNDER SECTIONS 251 AND 252 OF THE
                         TELECOMMUNICATIONS ACT OF 1996

     This Interconnection Agreement under Sections 251 and 252 of the
Telecommunications Act of 1996 ("Agreement"), is by and between Southwestern
Bell Telephone Company, a Missouri Corporation ("SWBT"), and Digital Teleport,
Inc. ("DTI").

     WHEREAS, the Parties want to interconnect their networks at mutually
agreed upon points of interconnection to provide, directly or indirectly,
Telephone Exchange Services and Exchange Access to residential and business end
users predominantly over their respective telephone exchange service facilities
in Kansas; and

     WHEREAS, the Parties are entering into this Agreement to set forth the
respective obligations of the Parties and the terms and conditions under which
the Parties will interconnect their networks and provide other services as
required by the Telecommunications Act of 1996 ("the Act") and additional
services as set forth herein; and

     WHEREAS, for purposes of this Agreement, the Parties intend to operate
where SWBT is the incumbent local exchange carrier and DTI, a competitive local
exchange carrier, is certified by the Kansas Corporation Commission, as
required.

     NOW, THEREFORE, DTI and SWBT hereby agree as follows:
            
1.0  DEFINITIONS


     1.1 "Act" means the Communications Act of 1934 [47 U.S.C. 153(R)], as
amended by the Telecommunications Act of 1996.

     1.2 "Affiliate" is as defined in the Act.

     1.3 "Automatic Number Identification" or "ANI" is a switching system
feature that forwards the telephone number of the calling party and is used for
screening, routing and billing purposes.

     1.4 "Busy Line Interrupt" or "BLI" is performed when one Party's operator
bureau interrupts a telephone number in progress after Line Status Verification
has occurred. The operator bureau will interrupt the busy line and inform the
called party that there is a call waiting.

     1.5 "Calling Party Number" or "CPN" is a feature of signaling system 7
(SS7) protocol whereby the ten (10) digit number of the calling party is
forwarded from the end office.

     1.6 "Central Office Switch" means a single switching system within the
public switched telecommunications network, including the following:



<PAGE>   7


                                                    GENERAL TERMS AND CONDITIONS
                                                                    DTI - KANSAS
                                                                    PAGE 2 OF 42


            (i)  "End Office Switches" which are Class 5 switches where end
                 user Exchange Services are directly connected and offered; and

            (ii) "Tandem Office Switches" or "Tandems" which are
                 Class 4 switches used to connect and switch trunk circuits
                 between Central Office Switches.

Central Office Switches may be employed as combination End Office/Tandem Office
switches (combination Class 5/Class 4).

     1.7 "CLASS Features" mean certain CCS-based features available to end
users including, but not limited to: Automatic Call Back; Call Trace; Caller
Identification and related blocking features; Distinctive Ringing/Call Waiting;
Selective Call Forward; and Selective Call Rejection.

     1.8 "Collocation" means an arrangement whereby one Party's (the
"Collocating Party") facilities are terminated in its equipment necessary for
Interconnection or for access to Network Elements on an unbundled basis which
has been installed and maintained at the premises of a second Party (the
"Housing Party"). Collocation may be "physical" or "virtual." In "Physical
Collocation," the Collocating Party installs and maintains its own equipment in
the Housing Party's premises. In "Virtual Collocation," the Housing Party
installs and maintains the collocated equipment in the Housing Party's
premises. Collocation includes, but is not limited to, collocation of 38 GHz
basic transmission equipment, provided it complies with the guidelines in
SWBT's current Physical Collocation 02/14/97 Technical Publication provided to
DTI.

     1.9 "Commission" means the Kansas Corporation Commission.

     1.10 "Common Channel Signaling" or "CCS" is a special network, fully
separate from the transmission path of the public switched network, that
digitally transmits call set-up and network control data. Unless otherwise
agreed by the Parties, the CCS used by the Parties shall be SS7.

     1.11 "Cross Connect" means the unbundled network element cross connect
rate element which is used to designate connection between: i) the SWBT
distribution frame and an unbundled network element component, or ii) two
unbundled network element components, or iii) the SWBT distribution frame and
the tie cable termination point for DTI collocation.

     1.12 "Dialing Parity" is as defined in the Act. As used in this Agreement,
Dialing Parity refers to both Local Dialing Parity and Toll Dialing Parity.

     1.13 "Digital Signal Level" means one of several transmission rates in the
time-division multiplex hierarchy.


<PAGE>   8


                                                    GENERAL TERMS AND CONDITIONS
                                                                    DTI - KANSAS
                                                                    PAGE 3 OF 42




     1.14 "Digital Signal Level 0" or "DS0" means the 64 Kbps zero-level signal
in the time-division multiplex hierarchy.

     1.15 "Digital Signal Level 1" or "DS1" means the 1.544 Mbps first-level
signal in the time-division multiplex hierarchy. In the time-division
multiplexing hierarchy of the telephone network, DS1 is the initial level of
multiplexing.

     1.16 "Digital Signal Level 3" or "DS3" means the 44.736 Mbps third-level
in the time division multiplex hierarchy. In the time-division multiplexing
hierarchy of the telephone network, DS3 is defined as the third level of
multiplexing.

     1.17 "End User" means a third-party residence or business, that subscribes
to Telecommunications Services provided by either of the Parties, or by another
telecommunications service provider.

     1.18 "Exchange Access" is as defined in the Act.

     1.19 "Exchange Message Record" or "EMR" means the standard used for
exchange of Telecommunications message information among Telecommunications
Carriers for billable, non-billable, sample, settlement and study data. EMR
format is contained in Bellcore Practice BR-010-200-010 CRIS Exchange Message
Record.

     1.20 "Fiber-Meet" means an Interconnection architecture method whereby the
Parties physically interconnect their networks via an optical fiber interface
(as opposed to an electrical interface) at a mutually agreed upon location.

     1.21 "Interconnection" is as Described in the Act and refers to the
connection of separate pieces of equipment, facilities, or platforms between or
within networks for the purpose of transmission and routing of Telephone
Exchange Service traffic and Exchange Access traffic.

     1.22 "Interconnection Activation Date" is the date that the construction
of the joint facility Interconnection arrangement has been completed, trunk
groups have been established, and joint trunk testing is completed.

     1.23 "Interexchange Carrier" or "IXC" means a carrier that provides,
directly or indirectly, interLATA or intraLATA Telephone Toll Services. For
purposes of Section 6.0 of this Agreement, the term "IXC" includes any entity
which purchases FGB or FGD Switched Exchange Access Service in order to
originate or terminate traffic to/from DTI's end users.

     1.24 "IntraLATA Toll Traffic" means those intraLATA station calls that are
not defined as Local Traffic in this Agreement.




<PAGE>   9


                                                    GENERAL TERMS AND CONDITIONS
                                                                    DTI - KANSAS
                                                                    PAGE 4 OF 42


     1.25 "Line Status Verification" or "LSV" or "Busy Line Verify" or "BLV" is
performed when one Party's end user requests assistance from the operator
bureau to determine if the called line of the other Party is in use.

     1.26 "Local Traffic," for purposes of intercompany compensation, is if (i)
the call originates and terminates in the same SWBT exchange area; or (ii)
originates and terminates within different SWBT Exchanges that share a common
mandatory local calling area, e.g., mandatory Extended Area Service (EAS),
mandatory Extended Local Calling Service (ELCS), or other like types of
mandatory expanded local calling scopes.

     1.27 "Losses" means any and all losses, costs (including court costs),
claims, damages (including fines, penalties, and criminal or civil judgments
and settlements), injuries, liabilities and expenses (including attorneys'
fees).

     1.28 "MECAB" refers to the Multiple Exchange Carrier Access Billing
(MECAB) document prepared by the Billing Committee of the Ordering and Billing
Forum (OBF), which functions under the auspices of the Carrier Liaison
Committee (CLC) of the Alliance for Telecommunications Industry Solutions
(ATIS). The MECAB document, published by Bellcore as Special Report
SR-BDS-000983, contains the recommended guidelines for the billing of access
services provided to an IXC by two or more LECs, or by one LEC in two or more
states within a single LATA. The latest release is issue No. 5, dated June
1994.

     1.29 "MECOD" refers to the Multiple Exchange Carriers Ordering and Design
(MECOD) Guidelines for Access Services - Industry Support Interface, a document
developed by the Ordering/Provisioning Committee of the Ordering and Billing
Forum (OBF), which functions under the auspices of the Carrier Liaison
Committee (CLC) of the Alliance for Telecommunications Industry" Solutions
(ATIS). The MECOD document, published by Bellcore as Special Report SR
STS-002643, establishes methods for processing orders for access service which
is to be provided to an IXC by two or more telecommunications providers. The
latest release is issue No. 3, dated February 1996.

     1.30 "Meet-Point Billing" or "MPB" refers to a billing arrangement whereby
two or more Telecommunications Carriers jointly provide for switched access
service to an IXC, with each LEC receiving an appropriate share of its switched
access revenues as defined by its effective access tariffs.

     1.31 "Metropolitan Exchange Area" means a geographical area defined in
SWBT current tariffs effective as a metropolitan exchange local calling area.
For example, Dallas, Ft. Worth, Houston, Little Rock, Oklahoma City, St. Louis,
Austin and would be examples of Metropolitan Exchange Areas.

     1.32 "Network Element Bona Fide Request" means the process described [in
Appendix BFR that is attached hereto and incorporated herein] that prescribes
the terms and conditions relating to a Party's request that the other Party
provide a Network Element.




<PAGE>   10


                                                    GENERAL TERMS AND CONDITIONS
                                                                    DTI - KANSAS
                                                                    PAGE 5 OF 42




     1.33 "Switched Exchange Access Service" means the offering of transmission
or switching services to Telecommunications Carriers for the purpose of the
origination or termination of Telephone Toll Service. Switched Exchange Access
Services include, but are not necessarily limited to: Feature Group A, Feature
Group B, Feature Group D, 800/888 access, and 900 access and their successors
or similar Switched Exchange Access services.

     1.34 "Telephone Exchange Services"

     1.35 "Synchronous Optical Network" or "SONET" means an optical interface
standard that allows inter-networking of transmission products from multiple
vendors. The base rate is 51.84 Mbps (OC-l/STS-1) and higher rates are
direct multiples of the base rate, up to 13.22 Gpbs.

     1.36 "Telephone Exchange Service" is as defined in the Act.

     1.37 "Wire Center" means an occupied structure or portion thereof in which
a Party has the exclusive right of occupancy and which serves as a Routing
Point for Switched Exchange Access Service.

2.0 INTERPRETATION AND CONSTRUCTION

     In the event of any amendment of the Act or any legislative, regulatory,
judicial order, rule or regulations, or other legal action that revises or
reverses the Act, the FCC's Orders in FCC Docket Nos. 96-98 and 95-185 or any
applicable order or arbitration award purporting to apply the provisions of the
federal Act, the Parties reserve all of their rights and remedies, including
those to amend, alter, or revise this Agreement.

3.0  IMPLEMENTATION SCHEDULE AND INTERCONNECTION ACTIVATION DATES

     Subject to the terms and conditions of this Agreement, Interconnection of
the Parties' facilities and equipment pursuant to Sections 4.0, 5.0 and 6.0 for
the transmission and routing of Telephone Exchange Service traffic and Exchange
Access traffic shall be established on or before the corresponding
"Interconnection Activation Date" shown for each such Metropolitan Exchange
Area on Appendix DCO attached hereto and incorporated by reference. Appendix
DCO may be revised and supplemented from time to time upon the mutual agreement
of the Parties to reflect the Interconnection of additional Metropolitan
Exchange Areas pursuant to Section 4.6 by modifying or updating Appendix DCO.

4.0  INTERCONNECTION PURSUANT TO SECTION 251(C)(2)



<PAGE>   11


                                                    GENERAL TERMS AND CONDITIONS
                                                                    DTI - KANSAS
                                                                    PAGE 6 OF 42



  4.1 SCOPE

     This Section 4.0 describes the physical architecture for Interconnection
of the Parties' facilities and equipment for the transmission and routing of
Telephone Exchange Service traffic and Exchange Access traffic pursuant to
Section 251(c)(2) of the Act. Such Interconnections shall be equal in quality
to that provided by the Parties to themselves or to any subsidiary, affiliate
or Third Party. Appendix ITR attached hereto and incorporated by reference
prescribes the specific trunk groups (and traffic routing parameters) which
will be configured over the physical connections described in this Section 4.0
to provide the facilities for the transmission and routing of Telephone
Exchange Service traffic (as described in Section 5.0), Exchange Access traffic
(as described in Section 6.0), LSV/BLI traffic (as described in sub-section
7.2).

  4.2 INTERCONNECTION COVERAGE

     The Parties shall provide for interoperation of their networks and shall
interconnect their facilities as stated below:

  4.2.1. DTI shall interconnect with SWBT's facilities as follows:

            a.   In each SWBT exchange area in which DTI chooses
                 to offer local exchange service, DTI, at a minimum, will
                 interconnect its network facilities to: (a) each SWBT access
                 tandem(s), and (b) to either each SWBT local tandem(s) or each
                 SWBT end office(s) ("EO") subtending that local tandem(s).
                 SWBT EOs and tandems through which DTI will terminate its
                 traffic will be called SWBT Interconnection Wire Centers and
                 are identified in Appendix DCO. As DTI initiates Exchange
                 Service operations in additional SWBT exchange areas, SWBT and
                 DTI shall agree upon additional SWBT Interconnection Wire
                 Centers in each new exchange area. DTI agrees that if SWBT
                 establishes additional tandems in an exchange area within
                 which DTI offers local exchange service, DTI will interconnect
                 to the additional tandems.

            b.   Interconnection to a SWBT local tandem(s) will
                 provide DTI local access to the SWBT end offices and NXXs
                 which subtend that tandem(s), and to other Local Exchange
                 Carriers ("LECs") (subject to sub-section 5.4) which are
                 connected to that tandem(s). Interconnection to SWBT EO(s)
                 will provide DTI access only to the NXXs served by that
                 individual EO(s) to which DTI interconnects.

            c.   Interconnection to a SWBT access tandem will
                 provide DTI interexchange access to SWBT, IXCs, LECs and CRMS
                 providers (subject to sub-section 7.3) which are connected to
                 that tandem. Where an access tandem also provides local tandem
                 functions, interconnection to a SWBT access tandem serving
                 that exchange will also provide DTI access to SWBT's EOs with
                 the same functionality described in (b) above.



<PAGE>   12

                                                    GENERAL TERMS AND CONDITIONS
                                                                    DTI - KANSAS
                                                                    PAGE 7 OF 42


            d.   Where DTI requires ancillary services (e.g.,
                 Directory Assistance, Operator Assistance, E911/911)
                 additional interconnection to SWBT's Interconnection Wire
                 Center(s) or special trunking will be required for
                 interconnection to such ancillary services.

     4.2.2. SWBT shall interconnect with DTI's facilities under terms and
conditions no less favorable than those identified in sub-section 4.2.1, above.

  4.3 METHODS FOR INTERCONNECTION

     Where the Parties interconnect, for the purpose of exchanging traffic
between networks, the Parties may use the following interconnection methods of
each Tandem and End Office identified in Appendix DCO making use of facilities
they own or lease from a third party.

     4.3.1 Physical Collocation Interconnection ("PCI") - Where DTI provides
fiber cable and connects to its equipment located in the SWBT Wire Center. DTI
owns and maintains DTI's equipment.

     4.3.2 Virtual Collocation Interconnection ("VCI") - Where DTI provides
fiber cable to SWBT for connection to DTI-designated basic transmission
equipment dedicated solely for DTI's use, located in the SWBT Interconnection
Wire Center. SWBT owns and maintains the basic transmission equipment at the
SWBT Interconnection Wire Center. This option shall be consistent with the
terms of SWBT's virtual collocation tariff.

     4.3.3 SONET-Based Interconnection ("SBI") - Where DTI provides fiber cable
to SWBT for connection to SWBT-designated basic transmission equipment located
at the SWBT Interconnection Wire Center and dedicated solely for DTI's use.
SWBT owns and maintains the basic transmission equipment. This option shall be
consistent with SWBT's SBI tariff.

     4.3.4 Leased Facility Interconnection ("LFI") - Where network facilities
exist, either Party may lease facilities from the other Party at rates no
greater than SWBT Access Tariff rates.

     4.3.5 Mid-span Fiber Interconnection ("MSFI") - Where the Parties agree to
interconnect through SONET technology, using a Fujitsu originating line
terminating multiplexer fiber optic terminal ("FOT") details of this
architecture are addressed in Appendix MSFI attached hereto and incorporated by
reference. This interconnection arrangement is limited to interconnecting
trunks.

     4.3.6 The Parties may agree to utilize another Interconnection Method as
may be determined to be technically feasible in the future.

<PAGE>   13


                                                    GENERAL TERMS AND CONDITIONS
                                                                    DTI - KANSAS
                                                                    PAGE 8 OF 42



  4.4 PHYSICAL ARCHITECTURE. Using one or more of the Interconnection
Methods described in Section 4.3 above, the Parties will agree on a physical
architecture plan. This plan will be documented within Appendix DCO. The
Parties agree to deploy one physical architecture plan per Metropolitan Serving
Area. The two architecture arrangements, End Point Meet and Mid-Point Meet, are
discussed below. Additional physical architectures, as yet undefined, may
evolve during the term of this Agreement. These future as yet undefined
architectures can be deployed if mutually agreed upon.

     4.4.1 End Point Meet. Using the "End Point Meet" architecture, the Parties
will establish transport facilities from their own Central Office(s) to the
other party's Central Office(s) utilizing any method of interconnection
described in Section 4.3 above. Unless otherwise mutually agreed upon, each 
Party will use its own transport facilities to provide its trunking as set 
forth in Appendix ITR. Each Party will be responsible for the appropriate 
sizing, operation, and maintenance of its own transport facilities. If 
initially deployed as an End Point Architecture, the deployment architecture 
may be migrated or groomed, upon mutual agreement, to a Mid-Point Meet 
architecture.

     4.4.2 Mid-Point Meet. Using the Mid-Point Meet architecture, the Parties
will agree upon a Network Interconnection Point (NIP). The NIP functions as a
demarcation point for each Party. Each Party is responsible to transport all
trunking to its side of the NIP utilizing any method of interconnection
described in Section 4.3 above. Each Party is responsible for the appropriate
sizing, operation, and maintenance of the transport facility and trunking to
the NIP.

         4.4.2.1 A second NIP can be established to eliminate a "single point of
failure" when mutually agreed upon. The establishment of the second NIP should
not require additional or increased trunking or facilities of either Party.
Trunking from the initial NIP will be groomed or augmented to the second NIP
upon mutual agreement.

         4.4.2.2 When required, based on guidelines established pursuant to
Appendix ITR, either Party may trunk directly to the other Party's EO. If the
Party is virtually or physically collocated to the EO, then that collocation
will be designated a NIP. This collocation will be used for the transport of
direct EO trunking, in addition to other uses. The collocated Party is
responsible for the appropriate sizing, operation, and maintenance of the
transport facility. In the instance where the Party is not collocated, the EO
trunk group will be handed off at the original NIP and both Parties will be
responsible for the transport facility on their side of that NIP.

         4.4.2.3 Unless otherwise mutually agreed upon, when Mid-Point Meet
architecture has been deployed, it will remain as the architecture of choice
during the term of this Agreement.

<PAGE>   14

                                                    GENERAL TERMS AND CONDITIONS
                                                                    DTI - KANSAS
                                                                    PAGE 9 OF 42


  4.5 TECHNICAL SPECIFICATIONS

     4.5.1 DTI and SWBT shall work cooperatively to install and maintain a
reliable network. DTI and SWBT shall exchange appropriate information (e.g.,
maintenance contact numbers, network information, information required to
comply with law enforcement and other security agencies of the Government and
such other information as the Parties shall mutually agree) to achieve this
desired reliability.

     4.5.2 DTI and SWBT shall work cooperatively to apply sound network
management principles by invoking network management controls to alleviate or
to prevent congestion.

     4.5.3 Technical Publications that describes the practices, procedures,
specifications and interfaces generally utilized by SWBT, are listed in
Appendix TP attached hereto and incorporated by reference. Appendix TP will
herein assist the Parties in meeting their respective Interconnection 
responsibilities. Copies of the publications listed in Appendix TP have been 
or shall be provided to DTI by SWBT.

  4.6 INTERCONNECTION IN ADDITIONAL METROPOLITAN EXCHANGE AREAS

     4.6.1 If DTI decides to offer Telephone Exchange Services in any other
Metropolitan Exchange and Areas in which SWBT also offers Telephone Exchange
Services, DTI shall provide written notice to SWBT of the need to establish
Interconnection in such Metropolitan Exchange Areas pursuant to this Agreement.

     4.6.2 The notice provided in Section 4.6.1 shall include: (i) the initial
Routing Point DTI has designated in the Metropolitan Exchange Area; (ii) DTI's
requested Interconnection Activation Date; and (iii) a non-binding forecast of
DTI's trunking requirements.

     4.6.3 Unless otherwise agreed by the Parties, the Parties shall designate
the Wire Center that DTI has identified as its initial Routing Point in the
Metropolitan Exchange Area as DTI Interconnection Wire Center ("IWC") in that
Metropolitan Exchange Area and shall designate the SWBT Tandem Office Wire
Center within the Metropolitan Exchange Area nearest to the IWC (as measured in
airline miles utilizing the V&H coordinates method) as the SWBT Interconnection
Wire Center (SIWC) in that Metropolitan Exchange Area.

     4.6.4 Unless otherwise agreed by the Parties, the Interconnection
Activation Date in each new Metropolitan Exchange Area shall be the one-hundred
and fiftieth (150th) day following the date on which DTI delivered notice to
SWBT of the need to establish Interconnection pursuant to Section 4.6.1 above.
Within ten (10) business days of SWBT's receipt of DTI's notice, SWBT and DTI
shall confirm their respective Wire Centers to be Interconnected and the
Interconnection Activation Date for the new Metropolitan Exchange Area by
attaching a supplementary schedule to Appendix DCO.

<PAGE>   15

                                                    GENERAL TERMS AND CONDITIONS
                                                                   DTI - KANSAS
                                                                   PAGE 10 OF 42


5.0  TRANSMISSION AND ROUTING OF TELEPHONE EXCHANGE SERVICE TRAFFIC PURSUANT
     TO SECTION 251(C)(2)

5.1 SCOPE OF TRAFFIC

     This Section 5.0 prescribes parameters for Traffic Exchange trunk groups
the Parties shall establish over the Interconnections specified in Section 4.0.
The Parties shall employ the Traffic Exchange trunk groups specified in this
Section 5.0 and in Appendix ITR. The Parties shall employ for the transmission
and routing of all Local and IntraLATA Toll Traffic between the Parties'
respective Telephone Exchange Service end users.

     5.1.1 For purposes of compensation under this Agreement, the
telecommunications traffic traded between DTI and SWBT will be classified as
either Local Traffic, Transit Traffic, Optional Calling Area Traffic, IntraLATA
Interexchange Traffic, InterLATA Interexchange Traffic, or FGA Traffic. The
compensation arrangement for the joint provision of Feature Group A (FGA)
Services is covered in Appendix FGA, attached hereto and incorporated herein by
reference. The Parties agree that, notwithstanding the classification of
traffic under this Agreement, either Party is free to define its own "local"
calling area(s) for purposes of its provision of Telecommunications Services to
its end users.

     5.1.2 Calls originated by one Party's end user and terminated to the other
Party's end user will be classified as "Local Traffic" under this Agreement if
the call: (i) originates and terminates in the same SWBT exchange area; or (ii)
originates and terminates within different SWBT Exchanges that share a common
mandatory local calling area, e.g., mandatory Extended Area Service (EAS),
mandatory Extended Local Calling Service (ELCS), or other like types of
mandatory expanded local calling scopes.

5.2 RESPONSIBILITIES OF THE PARTIES

     5.2.1 Each Party to this Agreement will be responsible for the accuracy
and quality of its data as submitted to the respective Parties involved.

     5.2.2 Each Party will include in the information transmitted to the other
for each call being terminated on the other's network (where available), the
originating Calling Party Number (CPN).

     5.2.3 If the percentage of calls passed with CPN is greater than ninety
percent (90%), all calls exchanged without CPN information will be billed as
either Local Traffic or IntraLATA Toll Traffic in direct proportion to the
minutes of use (MOU) of calls exchanged with CPN information. If the percentage
of calls passed with CPN is less than ninety percent (90%), all calls passed
without CPN will be billed as switched access.


<PAGE>   16



                                                    GENERAL TERMS AND CONDITIONS
                                                                   DTI - KANSAS
                                                                   PAGE 11 OF 42


     5.2.4 The type of originating calling number transmitted depends on the
protocol of the trunk signaling used for interconnection. Traditional toll
protocol will be used with Multi-Frequency (MF) signaling, and ANI will be sent
from the originating Party's end office switch to the terminating Party's
tandem or end office switch.

     5.2.5 Where one Party is passing CPN but the other party is not properly
receiving information, the Parties will cooperate to rate the traffic
correctly.

     5.3 RECIPROCAL COMPENSATION FOR TERMINATION OF LOCAL TRAFFIC

     5.3.1 The Compensation set forth below will apply to all Local Traffic as
defined in sub-section 5.1.2 of this Agreement.

     5.3.2 Applicability of Rates

                  i)   The rates, terms, conditions in this
                       Section 5.3 apply only to the termination of Local
                       Traffic, except as explicitly noted.

                  ii)  The Parties agree to compensate each
                       other for the termination of Local Traffic on a minute
                       of use (MOU) basis.

     5.3.3 Rate Elements

         5.3.3.1 A Tandem Served rate element is applicable to Tandem Routed 
Local Traffic on a terminating local MOU basis and includes compensation for the
following sub-elements:

                        i) Tandem Switching - compensation for the use of
                        tandem switching functions.

                        ii) Tandem Transport - compensation for the
                        transmission facilities between the local tandem and
                        the end offices subtending that tandem.

                        iii) End Office Switching - compensation for the local
                        EO office switching and line termination functions
                        necessary to complete the transmission.

        5.3.3.2 An End Office Served rate element applies to direct-routed Local
Traffic on a terminating local MOU basis and includes compensation for End
Office Switching. This includes direct-routed Local Traffic that terminates to
offices that have combined tandem and End Office functions.


<PAGE>   17

                                                    GENERAL TERMS AND CONDITIONS
                                                                   DTI - KANSAS
                                                                   PAGE 12 OF 42


     5.3.4 Local Traffic Interconnection Rates

       Serving Method     Prices Per MOU
       --------------     --------------
       Tandem Served             $.00975
       -------------      --------------
       End Office Served         $.00720
       -----------------  --------------

   5.4 RECIPROCAL COMPENSATION FOR TRANSIT TRAFFIC

     5.4.1 Transit Traffic allows one Party to send traffic to a third party
network through the other Party's tandem. A Transit Traffic rate element
applies to all MOUs between a Party and third party networks that transit the
other Party's tandem switch. The originating Party is responsible for the
appropriate rates unless otherwise specified. The Transit Traffic rate element
is only applicable when calls do not originate with (or terminate to) the
transit Party's end user. The two categories of Transit Traffic are: i) Local,
and ii) Optional Area. The following details when each element applies:

                  i)   The Local Transit Traffic rate
                       element applies when both the originating and
                       terminating end users are within SWBT local and
                       mandatory exchanges.

                  ii)  The Parties agree to apply the
                       Optional Area Transit rate to traffic terminating to
                       third party incumbent LECs that share a common mandatory
                       local calling area with all SWBT exchanges included in a
                       specific metropolitan exchange area. ILEC mandatory
                       exchanges are listed in Appendix Map.


         5.4.1.1 The Parties acknowledge that traffic originated in third party
incumbent LEC mandatory exchange areas as listed in Appendix Map, which is
attached hereto and incorporated by reference, may traverse the SWBT tandem and
terminate in other third party LEC exchange areas. Although direct connections
could be used for this traffic, SWBT agrees to transit this traffic for the
rate of $0.006 per MOU if the other LEC exchanges share a common mandatory
local calling area with all SWBT exchanges included in a specific exchange
area.

       Type of Transit Traffic  Prices Per MOU
       -----------------------  --------------
       Local Transit                    $0.003
       -------------            --------------
       Optional Area Transit            $0.004
       ---------------------    --------------

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                                                    GENERAL TERMS AND CONDITIONS
                                                                   DTI - KANSAS
                                                                   PAGE 13 OF 42


     5.4.2 All other traffic transits a tandem shall be treated as Meet-Point
Billing Traffic as described in Section 5.6 below or as intraLATA interexchange
traffic as described in Section 5.5.3 below, unless otherwise agreed.

     5.4.3 Each Party represents that it shall not send Local Traffic to the
other Party that is destined for the network of a third party unless and until
such Party has the authority to exchange traffic with the third party.

   5.5  RECIPROCAL COMPENSATION FOR TERMINATION OF INTRALATA
        INTEREXCHANGE TRAFFIC

     5.5.1 The parties also agree to apply the OCA compensation rate of $0.021
per MOU for traffic terminating to DTI end users in other incumbent LEC
exchange that share a common mandatory local calling area with all SWBT
exchanges that are included in the metropolitan exchange area. Appendix Map
lists the shared mandatory local calling areas.

     5.5.2 For intrastate intraLATA interexchange service traffic, compensation
for termination of intercompany traffic will be at terminating access rates for
Message Telephone Service (MTS) and originating access rates for 800 Service,
including the Carrier Common Line (CCL) charge, as set forth in each party's
Intrastate Access Service Tariff or as otherwise mutually agreed. For
interstate intraLATA intercompany service traffic, compensation for termination
of intercompany traffic will be at terminating access rates for MTS and
originating access rates for 800 Service including the CCL charge, as set forth
in each party's interstate Access Service Tariff or as otherwise mutually
agreed.

   5.6  COMPENSATION FOR ORIGINATION AND TERMINATION OF SWITCHED
        ACCESS SERVICE TRAFFIC TO OR FROM AN IXC (MEET-POINT BILLING MPB)
        ARRANGEMENTS)

     5.6.1 For interstate, interLATA traffic, terminating compensation will be
at access rates as set forth in each Party's own applicable access tariffs.

     5.6.2 The Parties will establish MPB arrangements in order to provide
Switched Access Services to IXCs via SWBT's access tandem switch in accordance
with the MPB guidelines adopted by and contained in the Ordering and Billing
Forum's MECOD and MECAB documents. DTI's Meet Points with SWBT shall be those 
identified in Appendix DCO and any supplements thereto.

     5.6.3 Billing to IXCs for the Switched Exchange Access Services jointly
provided by the Parties via Meet-Point Billing arrangement shall be according
to the multiple bill/multiple tariff method. As described in the MECAB
document, each Party will render a bill in accordance with its own tariff for
that portion of the service it provides. For the purpose of this Agreement, DTI
is the Initial Billing Company (IBC) and SWBT is the Subsequent Billing Company
(SBC). The assignment of revenues, by rate element, and the Meet-Point Billing



<PAGE>   19

                                                    GENERAL TERMS AND CONDITIONS
                                                                   DTI - KANSAS
                                                                   PAGE 14 OF 42


percentages applicable to this Agreement are set forth in Appendix DCO. The
actual rate values for each element shall be the rates contained in that
Party's own applicable access rates.

     5.6.4 The Parties, as applicable, will maintain provisions in their
respective federal and state access tariffs, or provisions within the National
Exchange Carrier Association (NECA) Tariff No. 4, or any successor tariff,
sufficient to reflect this MPB arrangement, including MPB percentages.

     5.6.5 As detailed in the MECAB document, the Parties will, in accordance
with accepted time intervals, exchange all information necessary to accurately,
reliably and promptly bill third Parties for Switched Access Services traffic
jointly handled by the Parties via the Meet Point Arrangement. Each Party
reserves the right to charge the other Party for the recording/processing
functions it performs pursuant to the terms and conditions of Appendix
Recording attached hereto and incorporated by reference. Information shall be
exchanged in Exchange Message Record (EMR) format, on magnetic tape or via a
mutually acceptable electronic file transfer protocol.

     5.6.6 Initially, billing to IXCs for the Switched Access Services jointly
provided by the parties via the MPB arrangement will be according to the
multiple bill/multiple tariff method, as described in the MECAB document. Each
Party will render a bill to the IXC in accordance with its own rate structure
for that portion of the service it provides. Each Party will bill its own
network access service rates to the IXC. The residual interconnection charge
(RIC), if any, will be billed by the Party providing the End Office function.

     5.6.7 Meet-Point Billing shall also apply to all jointly provided MOU
traffic bearing the 900, 800, and 888 NPAs or any other non-geographic NPAs
which may likewise be designated for such traffic in the future where the
responsible party is an IXC. When SWBT performs 800 database queries, SWBT will
charge the provider of the Signaling Service Point for the database query in
accordance with standard industry practices.

     5.6.8 Each Party shall coordinate and exchange the billing account
reference ("BAR") and billing account cross reference ("BACR") numbers for the
Meet Point Billing service. Each Party shall notify the other if the level of
billing or other BAR/BACR elements change, resulting in a new BAR/BACR number.

     5.6.9 Each Party will provide the other with the Exchange Access detailed
usage data within thirty (30) days of the end of the billing period. SWBT will
perform assembly and editing, messages processing and provision of Access 
Usage Records in accordance with Appendix Recording, attached hereto and 
incorporated by reference. Each Party will provide to the other the Exchange 
Access summary usage data within ten (10) working days after the date that a 
bill is rendered to the IXC by the initial Party. To the extent DTI provides 
SWBT with Access Usage Records, SWBT will compensate DTI on the same terms as 
DTI compensates SWBT per Appendix Recording. SWBT acknowledges that currently 
there is no charge for Summary Usage Data Records but that such a charge may be
appropriate. At DTI's request, 


<PAGE>   20

                                                    GENERAL TERMS AND CONDITIONS
                                                                   DTI - KANSAS
                                                                   PAGE 15 OF 42


SWBT will negotiate a mutual and reciprocal charge for provision of Summary 
Usage Data Records.

         5.6.10 Errors may be discovered by DTI, the IXC or SWBT. Both SWBT 
and DTI agree to provide the other Party with notification of any discovered 
errors within two (2) business days of the discovery.

         5.6.11 In the event of a loss of data, both Parties shall cooperate to
reconstruct the lost data within sixty (60) days of notification and if such
reconstruction is not possible, shall accept a reasonable estimate of the lost
data, based upon no more than three (3) to twelve (12) months of prior usage
data, if available.

   5.7  BILLING ARRANGEMENTS FOR COMPENSATION FOR TERMINATION OF
        INTRALATA, LOCAL, TRANSIT, AND OPTIONAL CALLING AREA TRAFFIC

     5.7.1 Other than for traffic described in sub-section 5.6 above, each
Party shall deliver monthly settlement statements for terminating the other
Party's traffic based on the following:

         5.7.1.1 Each Party shall, unless otherwise agreed, adhere to the 
detailed technical descriptions and requirements for the recording, record 
exchange, and billing of traffic using the guidelines as set forth in the 
Technical Exhibit Settlement Procedures (TESP), previously provided by SWBT to 
DTI. Reference to this technical publication is included in Appendix TP.

            (a)  Where DTI has direct/high usage trunks to a SWBT
                 end office with overflow trunking through a SWBT tandem,
                 billing for the Tandem Traffic will be calculated as follows:

                  Total Originating MOUs Recorded By DTI Less Direct End Office
                  Terminating MOUs Recorded By SWBT Equals Total MOUs To Be
                  Compensated As Tandem Traffic

            (b)  Where DTI has direct/high usage trunks to a third
                 party with overflow trunking through a SWBT tandem, DTI must
                 differentiate the originating MOU records for the Parties to
                 ascertain how many MOUs should be compensated as Transit
                 Traffic. If DTI is unable to so differentiate the originating
                 MOU records, the Parties shall mutually agree upon a surrogate
                 method for calculating Transit Traffic charges owed to SWBT.

         5.7.1.2 On a monthly basis, each Party will record its originating MOU
including identification of the originating and terminating NXX for all
intercompany calls.

<PAGE>   21

                                                    GENERAL TERMS AND CONDITIONS
                                                                   DTI - KANSAS
                                                                   PAGE 16 OF 42


         5.7.1.3 Each Party will transmit the summarized originating MOU from
Section 5.7.1.1 above to the transiting and/or terminating Party for
subsequent monthly intercompany settlement billing.

         5.7.1.4 Bills rendered by either Party will be paid within thirty (30)
days of receipt subject to subsequent audit verification.

         5.7.1.5 MOUs for the rates contained herein will be measured in 
seconds by call type, and accumulated each billing period into one (1) minute 
increments for billing purposes in accordance with industry rounding standards.
 
         5.7.1.6 Each Party will multiply the tandem routed and end office 
routed terminating MOUs by the appropriate rate contained in this Section to 
determine the total monthly billing to each Party.

  5.8 COMPENSATION FOR "PORTING" OPTIONAL CALLING AREA NUMBERS

     In those instances where an Optional Calling Area telephone number is
ported, DTI will compensate SWBT $12.20 monthly, per ported number.

6.0  TRANSMISSION AND ROUTING OF EXCHANGE ACCESS TRAFFIC PURSUANT TO 251(C)(2)

  6.1 SCOPE OF TRAFFIC

     Section 6.0 prescribes parameters for certain trunk groups ("Access Toll
Connecting Trunks") to be established over the Interconnections specified in
Section 4.0 above, for the transmission and routing of Exchange Access traffic
between DTI Telephone Exchange Service end users and IXCs via a SWBT access
tandem.

  6.2 TRUNK GROUP ARCHITECTURE AND TRAFFIC ROUTING

     6.2.1 The Parties shall jointly establish Access Toll Connecting Trunks as
described in Appendix ITR, by which will jointly provide tandem-transported
Switched Exchange Access Services to IXCs to enable DTI's end users to
originate and terminate traffic to/from such IXCs.

     6.2.2 Access Toll Connecting Trunks shall be used solely for the
transmission and routing of Switched Exchange Access to allow DTI end users to
originate and terminate traffic to/from any IXCs which is connected to a SWBT
Access Tandem.  In addition, the trunks shall be used to allow DTI's end users
to connect to, or be connected to, the 800 Services of any Telecommunications
Carrier connected to the SWBT Access Tandem.

<PAGE>   22

                                                    GENERAL TERMS AND CONDITIONS
                                                                   DTI - KANSAS
                                                                   PAGE 17 OF 42

7.0 TRANSPORT AND TERMINATION OF OTHER TYPES OF TRAFFIC

  7.1 INFORMATION SERVICES TRAFFIC

     7.1.1 At such time as the Parties agree to route intraLATA Information
Services Traffic to one another, they shall agree to exchange rating and
billing information to effectively allow the Parties to bill their end users
and to charge reciprocal rates.

  7.2 LINE STATUS VERIFICATION (LSV)/BUSY LINE INTERRUPT (BLI) TRAFFIC

     7.2.1 Each Party's operator bureau shall accept LSV and BLI inquiries from
the operator bureau of the other Party in order to allow transparent provision
of LSV/BLI Traffic between the Parties' networks.  Only one LSV attempt will be
made per end user operator bureau call, and the applicable charge shall apply
whether or not the line is busy at the time of verification or if the called
party agrees to release the line.  Only one BLI attempt will be made per end
user operator telephone call, and the applicable charge shall apply whether or
not the line is in use at the to time of interrupt or the called party releases
the line.

     7.2.2 Each Party shall route LSV/BLI Traffic inquiries between the
Parties' respective operator bureaus over trunks described in Appendix ITR.

  7.3 WIRELESS TRAFFIC

     7.3.1 Appendix Wireless, attached hereto and incorporated by reference
sets forth the terms and conditions under which the Parties will distribute
revenue from their joint provision of Wireless Interconnection Service for
mobile to landline traffic terminating through the Parties' respective wireline
switching networks within a LATA. If one Party enters into an interconnection
agreement with a CMRS provider, Appendix Wireless shall no longer be applicable
between the Parties with respect to such CMRS providers, and the other Party
shall be obligated to enter into an agreement with such CMRS provider for the
termination of wireless to landline traffic.

     7.3.2 DTI shall pay the Local Transit Traffic rate to SWBT for calls that
originate on DTI's network and are sent to SWBT for termination to a CMRS
Provider as long as such Traffic can be identified as wireless traffic.  SWBT
shall pay the Local Transit Traffic rate to DTI for such calls that originate
on SWBT's network are sent through DTI for termination on a CMRS Provider's
network. Each Party shall be responsible for interconnection agreements with
CMRS providers for terminating compensation regarding traffic originating on
the Party's network and terminating on the CMRS provider's network.

     7.3.3 When traffic is originated by either Party to a CMRS Provider, and
the traffic cannot be specifically identified as wireless traffic for purposes
of compensation between SWBT and DTI, the traffic will be rated either as
Local, Optional or Access and the appropriate compensation rate shall be paid
by the originating Party to the transiting Party. The originating 



<PAGE>   23

                                                    GENERAL TERMS AND CONDITIONS
                                                                    DTI - KANSAS
                                                                   PAGE 18 OF 42

Party agrees to indemnify the transiting Party for any claims of compensation 
that may be made by the CMRS provider against the transiting Party regarding 
compensation for such traffic.

8.0 SIGNALING

     8.1 The SWBT signaling publications that describe the practices,
procedures and specifications generally utilized by SWBT for signaling purposes
and are listed in Appendix TP which is attached hereto and incorporated herein.
A copy of these publications have been provided to DTI.

     8.2 The Parties will cooperate on the exchange of Transactional
Capabilities Application Part (TCAP) messages to facilitate interoperability of
CCS-based features between their respective networks, including all CLASS
features and functions, to the extent each Party offers such features and
functions to its end users. All CCS signaling parameters will be provided
including, without limitation, calling party number (CPN), originating line
information (OLI), calling party category and charge number.

9.0 NUMBERING

     9.1 Nothing in this Agreement shall be construed to limit or otherwise
adversely impact in any manner either Party's right to employ or to request and
be assigned any North American Numbering Plan (NANP) number resources
including, but not limited to, central office (NXX) codes pursuant to the
Central Office Code Assignment Guidelines(1), or to establish, by tariff or
otherwise, Exchanges and Rating Points corresponding to such NXX codes. Each
Party is responsible for administering the NXX codes it is assigned.

     9.2 At a minimum, in those Metropolitan Exchange Areas where DTI intends
to provide local exchange service, DTI shall obtain a separate NXX code for
each SWBT exchange or group of exchanges that share a common mandatory calling
scope as defined in SWBT tariffs. This will enable DTI and SWBT to identify the
jurisdictional nature of traffic for intercompany compensation until such time
as both Parties have implemented billing and routing capabilities to determine
traffic jurisdiction on a basis other than NXX codes.

     9.3 Each Party agrees to make available to the other, up-to-date listings
of its own assigned NPA-NXX codes, along with associated Rating Points and
Exchanges.

     9.4 To the extent SWBT serves as Central Office Code Administrator for a
given region, SWBT commits to treat DTI requests for assignment of central
office code(s) in a neutral and nondiscriminatory manner, consistent with
regulatory requirements, and (NXX) Central Office Code Assignment Guidelines.

- --------------------
(1)Last published by the Industry Numbering Committee ("INC") as INC
95-0407-008, Revision 4/7/95, formerly ICCF 93-0729-010.
<PAGE>   24

                                                    GENERAL TERMS AND CONDITIONS
                                                                    DTI - KANSAS
                                                                   PAGE 19 OF 42

     9.5 Each Party is responsible to program and update its own switches and
network systems to recognize and route traffic to the other Party's assigned
NXX codes at all times. Neither Party shall impose fees or charges on the other
Party for such required programming and updating activities.

     9.6 Each Party is responsible to input required data into the Routing Data
Base Systems (RDBS) and into the Bellcore Rating Administrative Data Systems
(BRADS) or other appropriate system(s) necessary to update the Local Exchange
Routing Guide (LERG), unless negotiated otherwise.

     9.7 Neither Party is responsible for notifying the other Parties' end
users of any changes in dialing arrangements, including those due to NPA
exhaust, unless otherwise ordered by the Commission, the FCC, or a court.

     9.8 NXX MIGRATION. Where either Party has activated an entire NXX for a
single end user, or activated more than half of an NXX for a single end user
with the remaining numbers in that NXX either reserved for future use or
otherwise unused, if such end user chooses to receive service from the other
Party, the first Party shall cooperate with the second Party to have the entire
NXX reassigned in the LERG (and associated industry databases, routing tables,
etc.) to an End Office operated by the second Party. Such transfer will require
development of a transition process to minimize impact on the Network and on
the end user(s)' service and will be subject to appropriate industry lead times
(currently forty-five (45) days) for movements of NXXs from one switch to
another. The Party to whom the NXX is migrated will pay NXX migration charges
of $10,000 per NXX to the Party formerly assigned the NXX.

10.0 RESALE -- SECTIONS 251(B)(1); 251(C)(4); 252(D)(3); AND 271(C)(2)(B)(XIV);

     10.1 AVAILABILITY OF SWBT RETAIL TELECOMMUNICATIONS SERVICES FOR RESALE

     SWBT shall offer to DTI for resale at wholesale rates its
Telecommunications Services, as described in Section 251(c)(4) of the Act,
pursuant to the terms and conditions of Appendix Resale attached hereto and
incorporated herein by this reference.

     10.2 AVAILABILITY OF DTI RETAIL TELECOMMUNICATION SERVICES FOR RESALE

     DTI shall make available its Telecommunications Services for resale at
     wholesale rates to SWBT in accordance with Section 251(b)(1) of the Act.

<PAGE>   25

                                                    GENERAL TERMS AND CONDITIONS
                                                                    DTI - KANSAS
                                                                   PAGE 20 OF 42


11.0 UNBUNDLED NETWORK ELEMENTS -- SECTIONS 251(C)(3), 271(C)(2)(B)
     (II),(IV),(V),(VI),(X)

     11.1 SWBT shall provide DTI access to unbundled network elements for the
provision of a telecommunication service as described in Section 251(c)(3) and
271(c)(2)(B) of the Act, pursuant to the terms and conditions of Appendix UNE
attached hereto and incorporated herein by this reference.

        11.2 DTI shall make available to SWBT access to its Unbundled Network
elements in accordance with Section 251 (c)(3) of the Act.

12.0 NOTICE OF CHANGES--SECTION 251(C)(5)

     Nothing in this Agreement shall limit either Party's ability to upgrade
its network through the incorporation of new equipment, new software or
otherwise. If a Party makes a change in its network which it believes will
materially affect the interoperability of its network with the other Party, the
Party making the change shall provide at least ninety (90) days advance written
notice of such change to the other Party. Notwithstanding the foregoing, if
either Party establishes additional tandems in an exchange area in which the
other Party offers local exchange service, that Party will provide the other
Party with not less than one-hundred eighty (180) days' advance notification of
same, and with greater notification when practicable. Both Parties agree to
coordinate interconnection matters consistent with the requirements of the
Americans with Disabilities Act (42 U.S.C. 12101) and with Sections 255 and 256
of the Act. In addition, the Parties will comply with the Network Disclosure
rules adopted by the FCC in CC Docket No. 96-98, Second Report and Order, as
may be amended from time to time. The Party upgrading its network shall be
solely responsible for the cost and effort of accommodating such changes in its
own network.

13.0 COLLOCATION--SECTION 251(C)(6)

     13.1 SWBT shall provide to DTI Physical Collocation space necessary for
Interconnection (pursuant to Section 4.0 of this Agreement) or access to
Network Elements on an unbundled basis except that SWBT may provide for Virtual
Collocation if SWBT demonstrates that Physical Collocation is not practical for
technical reasons or because of space limitations, as provided in Section
251(c)(6) of the Act. SWBT shall provide such Collocation for the purpose of
Interconnection or access to Network Elements on an unbundled basis, except as
otherwise mutually agreed to in writing by the Parties or as required by the
FCC or the appropriate Commission, subject to applicable federal and state
tariffs.

     13.2 Except as otherwise ordered by the Commission or the FCC, or as
mutually agreed to by DTI and SWBT, Physical Collocation shall be available at
a Central Office Switch location classified as an end office location, a
serving wire center, a tandem office location, or a remote node that serves as
a rating point for special access or switched access transport.

<PAGE>   26

                                                    GENERAL TERMS AND CONDITIONS
                                                                    DTI - KANSAS
                                                                   PAGE 21 OF 42


14.0 NUMBER PORTABILITY -- SECTIONS 251(B)(2) AND 271(C)(2)(B)(XI)

     14.1 The Parties shall provide to each other Interim Number Portability
(INP) on a reciprocal basis. Pursuant to the provisions in the Act, and in
accordance with the terms and conditions outlined in Appendix PORT, which is
attached hereto and incorporated herein, SWBT will provide DTI Interim Number
Portability through Remote Call Forwarding and Direct Inward Dialing technology
until Permanent Number Portability is implemented.

     14.2 Once Permanent Number Portability is implemented, either Party may
withdraw, at any time and at its sole discretion, its INP offerings, subject to
thirty (30) day's advance notice to the other Party to allow the seamless and
transparent conversion of INP end user numbers to Permanent Number Portability.

15.0 DIALING PARITY--SECTION 251(B)(3); 271(C)(2)(B)(XII); AND 271(E)(2)

     15.1 The Parties shall provide Local Dialing Parity to each other as
required under Section 251 (b)(3) of the Act.

     15.2 SWBT shall provide IntraLATA Dialing Parity in accordance with
Section 271(e)(2) of the Act.

16.0 ACCESS TO RIGHTS-OF-WAY--SECTION 251(B)(4) AND 271(C)(2)(B)(III)

     Each Party shall provide the other Party access to its poles, ducts,
rights-of-way and conduits it owns or controls in accordance with Section 224
of the Act on terms, conditions and prices comparable to those offered to any
other entity pursuant to each Party's applicable tariffs and/or standard
agreements.

17.0 DATABASE ACCESS -- SECTION 271(C)(2)(B)(X)

     In accordance with Section 27(c)(2)(B)(x) of the Act, SWBT shall provide
DTI with nondiscriminatory access to databases and associated signaling
necessary for call routing and completion. When requesting access to databases
not otherwise provided for in this Agreement, or appropriate interfaces,
regardless of whether they constitute unbundled Network Elements, DTI will use
the Network Element Bona Fide Request process. This process is defined in
Appendix UNE, which is attached hereto and incorporated herein by reference.

18.0 INTERCEPT REFERRAL ANNOUNCEMENTS

     18.1 The Party formerly providing service to an end user shall provide a
Basic Referral announcement, reciprocally and free of charge on the abandoned
telephone number. The announcement states that the called number has been
disconnected or changed and provides the end user's new telephone number to the
extent that it is listed.

<PAGE>   27

                                                    GENERAL TERMS AND CONDITIONS
                                                                    DTI - KANSAS
                                                                   PAGE 22 OF 42


            (a)  Basic Intercept Referral Announcements are to be
                 provided on residential numbers for a minimum of thirty (30)
                 days where facilities exist and the threat of telephone number
                 exhaustion is not imminent.

            (b)  Basic Intercept Referral Announcements for a
                 single line business end user and the primary listed telephone
                 number for DID and "Centrex-type" end users, shall be
                 available for a minimum of thirty (30) days or the life of the
                 White Pages directory, whichever is greater. If the threat of
                 telephone number exhaustion becomes imminent for a particular
                 Central Office, the service provider may reissue a
                 disconnected number prior to the expiration of the directory,
                 but no earlier than thirty (30) days after the disconnection
                 of the business telephone number.

19.0 COORDINATED REPAIR CALLS

     19.1 To avoid and minimize the potential for end user confusion, each
Party shall inform their respective end users of their respective repair bureau
telephone number(s) to access such bureaus. In the event that either Party 
receives a misdirected repair call, the Parties agree to employ the following 
procedures for handling such calls:

            (a)  To the extent the correct provider can be
                 determined, misdirected repair calls will be referred to the
                 proper provider of local exchange service in a courteous
                 manner, at no charge, and the end user will be provided the
                 correct contact telephone number.

            (b)  In responding to repair calls, neither Party
                 shall make disparaging remarks about each other, nor shall
                 they use these repair calls as the basis for internal
                 referrals or to solicit customers or to market services, nor
                 shall they initiate extraneous communications beyond the
                 direct referral to the correct repair telephone number.

20.0 OTHER SERVICES 271(C)(B)(2)(VII) AND 271(C)(2)(B)(VIII)

     20.1 WHITE PAGES. In accordance with Section 271 (c)(2)(B)(viii) of the
Act, SWBT will make nondiscriminatory access to White Pages service available
under the terms and conditions of Appendix WP, attached hereto and incorporated
by reference.

     20.2 CALLING NAME INFORMATION. The Parties shall provide, on mutually
agreeable and reciprocal terms, each other with access to Calling Name
information of their respective end users whenever one Party initiates a query
from a Signaling System Point for such information associated with a call
terminating to an end user who subscribes to a calling name service. SWBT will
provide Calling Name Information in accordance with and under the terms and
conditions of Appendix CNAM, attached hereto and incorporated by reference.

<PAGE>   28


                                                    GENERAL TERMS AND CONDITIONS
                                                                    DTI - KANSAS
                                                                   PAGE 23 OF 42


     20.3 BILLING/COLLECTING/REMITTING. The Parties will jointly agree to terms
and conditions for Billing, Collecting and Remitting for alternated billed
local message as described in Appendix BCR, attached hereto and incorporated by
reference.

     20.4 911 AND E911 SERVICES. Pursuant to Section 271 (c)(2)(B)(vii) of the
Act, SWBT will make nondiscriminatory access to 911 and E911 services available
under the terms and conditions of Appendix 911, attached hereto and
incorporated by reference.

     20.5 DIRECTORY ASSISTANCE (DA). Pursuant to Section 271 (c)(2)(B)(vii)(II)
of the Act, SWBT will provide nondiscriminatory access to DA services under the
terms and conditions identified in Appendix DA, attached hereto and
incorporated by reference.

     20.6 OPERATOR SERVICES. Pursuant to Section 271 (c)(2)(B)(vii)(III) of the
Act, SWBT shall provide nondiscriminatory access to Operator Services under the
terms and conditions identified in Appendix OS, attached hereto and
incorporated by reference.

     20.7 CLEARINGHOUSE SERVICES. To the extent requested by DTI, SWBT shall
provide for the tracking of message revenues from certain messages to
facilitate the transfer of revenues between the billing company the earning
company through the Clearinghouse Services provided by SWBT pursuant to the 
terms and conditions in Appendix CH, attached hereto and incorporated by 
reference.

     20.8 HOSTING. At DTI's request, SWBT shall perform hosting
responsibilities for the provision of billable message data and/or access usage
data received from an DTI for distribution to the appropriate billing and/or
processing location or for delivery to an DTI of such data via SWBT's internal
network or the nationwide CMDS network pursuant to Appendix HOST, attached
hereto and incorporated by reference

     20.9 SIGNALING SYSTEM 7 INTERCONNECTION. At DTI's request, SWBT shall
perform SS7 interconnection services for DTI pursuant to Appendix SS7, attached
hereto and incorporated by reference.

21.0 GENERAL RESPONSIBILITIES OF THE PARTIES

     21.1 SWBT and DTI shall each use their best efforts to meet the
Interconnection Activation Dates.

     21.2 Each Party is individually responsible to provide facilities within
its network that are necessary for routing, transporting, measuring, and
billing traffic from the other Party's network and for delivering such traffic
to the other Party's network in the standard format compatible with SWBT's
network as referenced in Bellcore's BOC Notes on LEC Networks Practice No.
SR-TSV-002275, and to terminate the traffic it receives in that standard format
to the proper address on its network. The Parties are each solely responsible
for participation in and 


<PAGE>   29

                                                    GENERAL TERMS AND CONDITIONS
                                                                    DTI - KANSAS
                                                                   PAGE 24 OF 42


compliance with national network plans, including the National Network 
Security Plan and the Emergency Preparedness Plan.

     21.3 Neither Party shall use any service related to or use any of the
services or elements provided in this Agreement in any manner that interferes
with other persons in the use of their service, prevents other persons from
using their service, or otherwise impairs the quality of service to other
carriers or to either Party's end users, and either Party may discontinue or
refuse service, but only for so long as the other Party is violating this
provision. Upon such violation, either Party shall provide the other Party
notice of the violation at the earliest practicable time.

     21.4 Each Party is solely responsible for the services it provides to its
end users and to other Telecommunications Carriers.

     21.5 The Parties shall work cooperatively to minimize fraud associated
with third-number billed calls, calling card calls, and any other services
related to this Agreement.

     21.6 At all times during the term of this Agreement, each Party shall keep
and maintain in force at each Party's expense all insurance required by law
(e.g. workers' compensation insurance) as well as general liability insurance
for personal injury or death to any one person, property damage resulting from
any one incident, automobile liability with coverage for bodily injury for
property damage. Upon request from the other Party, each Party shall provide to
the other Party evidence of such insurance (which may be provided through a 
program of self insurance).

     21.7 In addition to its indemnity obligations under Section 26.0, each
Party shall provide, in its tariffs and contracts with its end users that
relate to any Telecommunications Service provided or contemplated under this
Agreement, that in no case shall such Party or any of its agents, contractors
or others retained by such parties be liable to any end user or third party for
(i) any Loss relating to or arising out of this Agreement, whether in contract
or tort, that exceeds the amount such Party would have charged the applicable
end user for the service(s) or function(s) that gave rise to such Loss, and
(ii) any Consequential Damages.

     21.8 Unless otherwise stated, each Party will render a monthly bill to the
other for service(s) provided hereunder. Remittance in full will be due within
thirty (30) days of that billing date. Interest shall apply on overdue amounts
(other than disputed amounts which are subject to Section 30.12) at the rate
specified in Section 30.12, unless otherwise specified in an applicable tariff.
Each Party reserves the right to net delinquent amounts against amounts
otherwise due the other.

     21.9 SWBT is participating with the industry to develop standardized
methods through the OBF and shall implement ordering and billing
formats/processes consistent with industry guidelines as capabilities are
deployed. Where such guidelines are not available or SWBT 


<PAGE>   30

                                                    GENERAL TERMS AND CONDITIONS
                                                                    DTI - KANSAS
                                                                   PAGE 25 OF 42

decides not to fully utilize industry guidelines, SWBT will provide DTI with 
information on its ordering and billing format/process and requirements at
the earliest practicable time.

22.0 EFFECTIVE DATE, TERM, AND TERMINATION

     22.1 This Agreement shall be effective ten (10) days after approval by the
Commission when it has determined that the Agreement complies with Sections 251
and 252 of the Act ("Effective Date").

     22.2 The initial term of this Agreement shall be one (1) year (the "Term")
which shall commence on the Date of Execution. Absent the receipt by one Party
of written notice from the other Party at least sixty (60) days prior to the
expiration of the Term to the effect that such Party does not intend to extend
the Term of this Agreement, this Agreement shall automatically renew and remain
in full force and effect on and after the expiration of the Term until
terminated by either Party pursuant to Section 22.3, below.

     22.3 Either Party may terminate this Agreement in the event that the other
Party fails to perform a material obligation that disrupts the operation of
either Party's network and/or end user service and fails to cure such material
nonperformance within forty-five (45) days after written notice thereof.

     22.4 If pursuant to Section 22.2, above, this Agreement continues in full
force and effect after the expiration of the Term, either Party may terminate
this Agreement ninety (90) days after delivering written notice to the other
Party of its intention to terminate this Agreement, subject to Section 22.5,
below. Neither Party shall have any liability to the other Party for
termination of this Agreement pursuant to this Section 22.4 other than its
obligations under Section 22.5, below.

     22.5 Upon termination or expiration of this Agreement in accordance with
this Section 22.0, above:

            (a)  each Party shall comply immediately with its
                 obligations set forth in Section 30.6, below; and

            (b)  each Party shall promptly pay all amounts
                 (including any late payment charges) owed under this
                 Agreement; and

            (c)  each Party 's indemnification obligations shall
                 survive.

     22.6 If upon expiration or termination, the Parties are negotiating a
successor agreement; during such period, each Party shall continue to perform
its obligations and provide the services described herein that are to be
included in the successor agreement until such time as the latter agreement
becomes effective; provided however, that if the Parties are unable to reach
agreement within six (6) months after termination or expiration of this
Agreement, either Party 


<PAGE>   31

                                                    GENERAL TERMS AND CONDITIONS
                                                                    DTI - KANSAS
                                                                   PAGE 26 OF 42



has the right to submit this matter to the Commission for resolution. Until a 
survivor agreement is reached or the Commission resolves the matter, whichever 
is sooner, the terms, conditions, rates, and charges stated herein will 
continue to apply, subject to a true-up based on the Commission action, if
any.

     22.7 Except as set forth in Section 28.5, below, no remedy set forth in
this Agreement is intended to be exclusive and each and every remedy shall be
cumulative and in addition to any other rights or remedies now or hereafter
existing under applicable law or otherwise.

23.0 DISCLAIMER OF REPRESENTATIONS AND WARRANTIES

     EXCEPT AS EXPRESSLY PROVIDED UNDER THIS AGREEMENT, NO PARTY MAKES OR
RECEIVES ANY WARRANTY, EXPRESS OR IMPLIED, WITH RESPECT TO THE SERVICES,
FUNCTIONS AND PRODUCTS IT PROVIDES UNDER OR CONTEMPLATED BY THIS AGREEMENT AND
THE PARTIES DISCLAIM THE IMPLIED WARRANTIES OF MERCHANTABILITY OR OF FITNESS
FOR A PARTICULAR PURPOSE. ADDITIONALLY, NEITHER SWBT NOR DTI ASSUMES
RESPONSIBILITY WITH REGARD TO THE CORRECTNESS OF DATA OR INFORMATION SUPPLIED
BY THE OTHER WHEN THIS DATA OR INFORMATION IS ACCESSED AND USED BY A THIRD
PARTY.

24.0 CHANGES IN END USER LOCAL EXCHANGE SERVICE PROVIDER SELECTION

     Each Party will abide by applicable state or federal laws and regulations
in obtaining end user authorization prior to changing end user's local service
provider to itself and in assuming responsibility for any applicable charges as
specified in Section 258 (b) of the Telecommunications Act of 1996. The 
Parties shall make authorization available to each other upon request and at 
no charge. Only an end user can initiate a challenge to a change in its local 
exchange service provider. If an end user notifies SWBT or DTI that the end 
user requests local exchange service, the Party receiving such request shall 
be free to immediately provide service to such end user. When an end user 
changes or withdraws authorization, each Party shall release customer-specific
facilities in accordance with the end user's direction or the end user's 
authorized agent. Further, when an end user abandons the premise, SWBT is free
to reclaim the unbundled network element facilities for use by another 
customer and is free to issue service orders required to reclaim such 
facilities.

25.0 SEVERABILITY

     25.1 The Parties negotiated the services, arrangements, Interconnection,
terms and conditions of this Agreement by the Parties as a total arrangement
and are intended to be nonseverable, subject only to Section 30.16 of this
Agreement.

<PAGE>   32


                                                    GENERAL TERMS AND CONDITIONS
                                                                    DTI - KANSAS
                                                                   PAGE 27 OF 42


     25.2 In the event the Commission, the FCC, or a court rejects any portion
or determines that any provision of this Agreement is contrary to law, or is
invalid or unenforceable for any reason, the Parties shall continue to be bound
by the terms of this Agreement, insofar as possible, except for the portion
rejected or determined to be unlawful, invalid, or unenforceable. In such
event, the Parties shall negotiate in good faith to replace the rejected,
unlawful, invalid, or unenforceable provision and shall not discontinue service
to the other party during such period if to do so would disrupt existing
service being provided to an end user. Nothing in this Agreement shall be
construed as requiring or permitting either Party to contravene any mandatory
requirement of federal or state law, or any regulations or orders adopted
pursuant to such law.

26.0 INTELLECTUAL PROPERTY

     LSP is responsible for obtaining any license or right to use agreement
associated with a Unbundled Network Element purchased from SWBT. SWBT will
provide a list of all known and necessary licenses or right to use agreements
applicable to the subject Network Element(s) within seven days of a request for
such a list by LSP. SWBT agrees to use its best efforts to facilitate the
obtaining of any necessary license or right to use agreement. SWBT makes no
warranties, express or implied, concerning LSP's (or any third party's) rights
with respect to intellectual property (including with limitation, patent,
copyright, and trade secret rights) or contract rights associated with LSP's
rights to interconnect with SWBT's network and to Unbundled Network Elements.

27.0 INDEMNIFICATION

     27.1 Except as otherwise provided herein or in specific appendices, each
Party shall be responsible only for service(s) and facility(ies) which are
provided by that Party, its authorized agents, subcontractors, or others
retained by such parties, and neither Party shall bear any responsibility for
the service(s) and facility(ies) provided by the other Party, its agents,
subcontractors, or others retained by such parties.

     27.2 Except as otherwise provided herein or in specific appendices, and to
the extent not prohibited by law and not otherwise controlled by tariff, each
Party (the "Indemnifying Party") shall defend and indemnify the other Party
(the "Indemnified Party") and hold such Indemnified Party harmless against any
Loss to a third party arising out of the negligence or willful misconduct by
such Indemnifying Party, its agents, its end user, contractors, or others
retained by such parties, in connection with the indemnifying provision of
services or functions under this Agreement.

     27.3 In the case of any Loss alleged or made by an end user of either
Party, the Party whose end user alleged or made such Loss (Indemnifying Party)
shall defend and indemnify the other Party (Indemnified Party) against any and
all such claims or Loss by its end users regardless of whether the underlying
service was provided or unbundled element was 


<PAGE>   33

                                                    GENERAL TERMS AND CONDITIONS
                                                                    DTI - KANSAS
                                                                   PAGE 28 OF 42

provisioned by the Indemnified Party, unless the Loss was caused by the
gross negligence or intentional misconduct of the other (Indemnified) Party.

     27.4 LSP agrees to indemnify, defend and hold harmless SWBT from any Loss
arising out of SWBT's provision of 911 services or out of LSP's end users' use
of the 911 service, whether suffered, made, instituted, or asserted by LSP or
its end users, including for any personal injury or death of any person or
persons, except for Loss which is the direct result of SWBT's own negligence or
willful misconduct.

     27.5 Each Party shall be indemnified, defended and held harmless by the
other Party against any Loss arising from a Party's use of services or elements
provided under this Agreement involving: tort claims, including claims for
libel, slander, invasion of privacy, or infringement of copyright arising from
a Party's own communications or the communications of its end users.

     27.6 SWBT shall be indemnified, defended, and held harmless by the LSP for
claims for patent, trademark, infringement or other infringement or
intellectual property rights, arising from the LSP's use of services or
unbundled elements provided under this Agreement.

     27.7 The Indemnifying Party agrees to defend any suit brought against the
Indemnified Party for any Loss identified in this Section or specific
appendices. The Indemnified Party agree to notify the Indemnifying Party
promptly in writing of any written claims, lawsuits or demands for which the
Indemnifying Party may be responsible under this Agreement. The Indemnified
Party shall cooperate in every reasonable way to facilitate defense or
settlement. The Indemnifying Party shall have the right to control and conduct
the defense and settlement of any action or claim subject to the consultation
of the Indemnified Party. The Indemnifying Party shall not be responsible for
any settlement unless the Indemnifying Party approved such settlement in
advance and agrees to be bound by the settlement agreement.

28.0 LIMITATION OF LIABILITY

     28.1 Except for indemnity obligations under this Agreement, or except as
otherwise provided in specific appendices, each Party's liability to the other
Party for any Loss relating to or arising out of any negligent act or omission
in its performance under this Agreement, whether in contract or tort, shall 
not exceed in total the amount SWBT or LSP has to or would have charged the 
other Party for the affected service(s) or function(s) which were not 
performed or were otherwise improperly performed.

     28.2 Except for Losses alleged or made by an end user of either Party, or
except as otherwise provided in specific appendices, in the case of any Loss
alleged or made by a third party arising under the negligence or willful
misconduct of both Parties, each Party shall bear, and its obligation under
this section shall be limited to, that portion (as mutually agreed to by the
Parties) of the resulting expense caused by its own negligence or willful
misconduct or that of its agents, servants, contractors, or others acting in
aid or concert with it.

<PAGE>   34

                                                    GENERAL TERMS AND CONDITIONS
                                                                    DTI - KANSAS
                                                                   PAGE 29 OF 42


     28.3 In no event shall either Party have any liability whatsoever to the
other Party for any indirect, special, consequential, incidental, or punitive
damages, including but not limited to, loss of anticipated profits or revenue
or other economic loss in connection with or arising from anything said,
omitted, or done hereunder (collectively, "Consequential Damages"), even if the
other Party has been advised of the possibility of such damages; provided that
the foregoing shall not limit a Party's obligation under this Agreement to
indemnify, defend, and hold the other Party harmless against any amounts
payable to a third party, including any losses, costs, fines, penalties,
criminal or civil judgments or settlements, expenses (including attorney's
fees) and Consequential Damages of such third party.

29.0 LIQUIDATED DAMAGES FOR SPECIFIED ACTIVITIES

     29.1 CERTAIN DEFINITIONS. When used in this Section 29.0, the following
terms shall have the meanings indicated:

         29.1.1 "SPECIFIED PERFORMANCE BREACH" means the failure by SWBT to meet
the Performance Criteria for any Specified Activity for a period of three (3)
consecutive calendar months.

         29.1.2 "Specified Activity" means any of the following activities:

                  (i)   the installation by SWBT of unbundled
                        elements associated with DTI end user Lines;

                  (ii)  SWBT's provision of Interim Number
                        Portability; or

                  (iii) the repair of out of service
                        problems for DTI ("Out of Service Repairs").

     29.1.3 "Performance Criteria" means, with respect to each calendar month
during the term of this Agreement, the performance by SWBT during such month of
each Specified Activity shown below within the time interval shown in at least
eighty percent (80%) of the covered instances:

<TABLE>
<S>                             <C>

SPECIFIED ACTIVITY
- ------------------------------------------------------------------
(i) DTI End User Lines          PERFORMANCE INTERVAL DATE
- ------------------------------------------------------------------
1-10 Lines per Service Order    five (5) business days from SWBT's
                                Receipt of valid Service Order
- ------------------------------------------------------------------
11-20 Lines per Service Order   ten (10) business days from SWBTs
                                Receipt of valid Service Order

</TABLE>


<PAGE>   35

                                                    GENERAL TERMS AND CONDITIONS
                                                                    DTI - KANSAS
                                                                   PAGE 30 OF 42


<TABLE>
<S>                             <C>
21+ Lines per Service Order     To Be Negotiated
- -----------------------------------------------------------------------
(ii) Interim Number
Portability
- -----------------------------------------------------------------------
1-10 Numbers per Service Order  five (5) business days from SWBT's
                                Receipt of valid Service Order
- -----------------------------------------------------------------------
11-20 Numbers per Service       ten (10) business days from SWBT's
Order                           Receipt of valid Service Order
- -----------------------------------------------------------------------
21+ Numbers per Service Order   To be Negotiated
- -----------------------------------------------------------------------
(iii) Out-of-Service Repairs    Less than twenty-four (24) hours from
                                SWBT's Receipt of Notification of Out-
                                of-Service Condition
- -----------------------------------------------------------------------
</TABLE>


     29.2 SPECIFIED PERFORMANCE BREACH. In recognition of the: (1) loss of end
user opportunities, revenues and goodwill which DTI might sustain in the event
of a Specified Performance Breach; (2) the uncertainty, in the event of such a
Specified Performance Breach, of DTI having available to it customer
opportunities similar to those opportunities currently available to DTI; and
(3) the difficulty accurately ascertaining the amount of damages DTI would
sustain in the event of such a Specified Performance Breach, SWBT agrees to pay
DTI, subject to Section 29.4 below, damages as set forth in Section 29.3 below
in the event of the occurrence of a Specified Performance Breach.

     29.3 LIQUIDATED DAMAGES. The damages payable by SWBT to DTI as a result of
a Specified Performance Breach shall be $75,000 for each Specified Performance
Breach (collectively, the "Liquidated Damages"). DTI and SWBT agree and
acknowledge that: (a) the Liquidated Damages are not a penalty and have been
determined based upon the facts and circumstances of DTI and SWBT at the time
of the negotiation and entering into of this Agreement, with due regard given
to the performance expectations of each Party; (b) the Liquidated Damages
constitute a reasonable approximation of the damages DTI would sustain if its
damages were readily ascertainable; and (c) DTI shall not be required to
provide any proof of the Liquidated Damages.

     29.4 LIMITATIONS. In no event shall SWBT be liable to pay the Liquidated
Damages if SWBT's failure to meet or exceed any of the Performance Criteria is
caused, directly or indirectly, by a Delaying Event. A "Delaying Event" means:
(a) a failure by DTI to perform any of its obligations set forth in this 
Agreement (including, without limitation, the Implementation Schedule and the 
Joint Implementation Process); (b) any delay, act or failure to act by an end 
user, agent or subcontractor of DTI; (c) any Force Majeure Event; or (d) for 
INP, where memory limitations in the switch in the SWBT serving office cannot 
accommodate the request. If a 



<PAGE>   36


                                                    GENERAL TERMS AND CONDITIONS
                                                                    DTI - KANSAS
                                                                   PAGE 31 OF 42

Delaying Event: (i) prevents SWBT from  performing a Specified Activity, then 
such Specified Activity shall be  excluded from the calculation of SWBT's 
compliance with the Performance  Criteria; or (ii) only suspends SWBT's 
ability to timely perform the Specified  Activity, the applicable time frame 
in which SWBT's compliance with the  Performance Criteria is measured shall be 
extended on an hour-for-hour or  day-for-day basis, as applicable, equal to 
the duration of the Delaying Event.

     29.5 SOLE REMEDY. The Liquidated Damages shall be the sole and exclusive
remedy of DTI for SWBT's breach of the Performance Criteria or a Specified
Performance Breach as described in this Section 29.0 and shall be in lieu of
any other damages or credit DTI might otherwise seek for such breach of the
Performance Criteria or a Specified Performance Breach through any claim or
suit brought under any contract or tariff.

     29.6 RECORDS. SWBT shall maintain complete and accurate records, on a
monthly basis, of its performance under this Agreement of each Specified
Activity and its compliance with the Performance Criteria. SWBT shall provide
to DTI such records in a self-reporting format on a monthly basis.
Notwithstanding Section 31.6.1, below, the Parties agree that such records
shall be deemed "Proprietary Information" under Section 31.6, below.

30.0 REGULATORY APPROVAL

     30.1 The Parties understand and agree that this Agreement will be filed
with the Commission and may thereafter be filed with the FCC. The Parties
believe in good faith and agree that the services to be provided under this
Agreement satisfy the specifically mentioned sections of the Act and are in the
public interest. Each Party covenants and agrees to fully support approval of
this Agreement by the Commission or the FCC under Section 252 of the Act
without modification.

     30.2 The Parties agree that the performance of the terms of this Agreement
will satisfy SWBT's obligation to provide Interconnection under Section 251 of
the Act, and the requirements of the Competitive Checklist, under Section 271
of the Act. DTI represents that it is, or intends to become, a provider of
Telephone Exchange Service to residential and business subscribers offered
exclusively over its own Telephone Exchange Service facilities or predominantly
over its own Telephone Exchange Service facilities in combination with the use
of unbundled Network Elements purchased from another entity and the resale of
the Telecommunications Services of other carriers.

31.0 MISCELLANEOUS

     31.1 AUTHORIZATION.


            (a)  SWBT is a corporation duly organized, validly
                 existing and in good standing under the laws of the State of
                 Missouri and has full power and 



<PAGE>   37


                                                    GENERAL TERMS AND CONDITIONS
                                                                    DTI - KANSAS
                                                                   PAGE 32 OF 42


                 authority to execute and deliver this Agreement and to 
                 perform the obligations hereunder.

            (b)  DTI is a corporation duly organized, validly
                 existing and in good standing under the laws of the State of
                 Missouri and has full power and authority to execute and
                 deliver this Agreement and to perform its obligations
                 hereunder.

  31.2 COMPLIANCE AND CERTIFICATION.

     31.2.1 Each Party shall comply with all federal, state, and local laws,
rules, and regulations applicable to its performance under this Agreement.

     31.2.2 Each Party warrants that it has obtained all necessary state
certification required in those states in which it has ordered services from
the other Party pursuant to this Agreement. Upon request by any state
governmental entity, each Party shall provide proof of certification.

     31.2.3 Each Party represents and warrants that any equipment, facilities
or services provided to the other Party under this Agreement comply with the
Communications Law Enforcement Act ("CALEA"). Each Party shall indemnify and
hold the other Party harmless from any and all penalties imposed upon the other
Party for such noncompliance and shall at the non-compliant Party's sole cost
and expense, modify or replace any equipment, facilities or services provided
to the other Party under this Agreement to ensure that such equipment,
facilities and services fully comply with CALEA.

  31.3 LAW ENFORCEMENT.

     31.3.1 SWBT and DTI shall handle law enforcement requests as follows:

            (a)  Intercept Devices: Local and federal law
                 enforcement agencies periodically request information or
                 assistance from local telephone service providers. When either
                 Party receives a request associated with an end user of the
                 other Party, it shall refer such request to the Party that
                 serves such end user, unless the request directs the receiving
                 Party to attach a pen register, trap-and-trace or form of
                 intercept on the Party's facilities, in which case that Party
                 shall comply with any valid request.

            (b)  Subpoenas: If a Party receives a subpoena for
                 information concerning an end user the Party knows to be an
                 end user of the other Party, it shall refer the subpoena to
                 the requesting party with an indication that the other Party
                 is the responsible company, unless the subpoena requests
                 records for a period of time during which the 


<PAGE>   38

                                                    GENERAL TERMS AND CONDITIONS
                                                                    DTI - KANSAS
                                                                   PAGE 33 OF 42

                 Party was the end user's service provider, in which case the 
                 Party will respond to any valid request.

            (c)  Emergencies: If a Party receives a request from a
                 law enforcement agency for temporary number change, temporary
                 disconnect, or one-way denial of outbound calls for an end
                 user of the other Party by the receiving Party's switch, that
                 Party will comply with an valid emergency request. However,
                 neither Party shall be held liable for any claims or damages
                 arising from compliance with such requests on behalf of the
                 other Party's end user and the Party serving such end user
                 agrees to indemnify and hold the other Party harmless against
                 any and all such claims.

     31.4 INDEPENDENT CONTRACTOR. Each Party and each Party's contractor shall
be solely responsible for the withholding or payment of all applicable federal,
state and local income taxes, social security taxes and other payroll taxes
with respect to its employees, as well as any taxes, contributions or other
obligations imposed by applicable state unemployment or workers' compensation
acts. Each Party has sole authority and responsibility to hire, fire and
otherwise control its employees.

     31.5 FORCE MAJEURE. Neither Party shall be liable for any delay or failure
in performance of any part of this Agreement from any cause beyond its control
and without its fault or negligence including, without limitation, acts of
nature, acts of civil or military authority, government regulations, embargoes,
epidemics, terrorist acts, riots, insurrections, fires, explosions,
earthquakes, nuclear accidents, floods, work stoppages, equipment failure,
cable cuts, power blackouts, volcanic action, other major environmental
disturbances, unusually severe weather conditions, inability to secure products
or services of other persons or transportation facilities or acts or omissions
of transportation carriers.  In such event, the Party affected shall, upon
giving prompt notice to the other Party, be excused from such performance on a
day-to-day basis to the extent of such interference (and the other Party shall
likewise be excused from performance of its obligations on a day-for-day basis
to the extent such Party's obligations related to the performance so interfered
with). The affected Party shall use its best efforts to avoid or remove the
cause of nonperformance and both Parties shall proceed to perform with dispatch
once the causes are removed or cease.

     31.6 CONFIDENTIALITY.

         31.6.1 All information, including but not limited to specifications,
microfilm, photocopies, magnetic disks, magnetic tapes, drawings, sketches,
models, samples, tools, technical information, data, employee records, maps,
financial reports, and market data; (i) furnished by one Party (the "Disclosing
Party") to the other Party (the "Receiving Party") dealing with
customer-specific, facility-specific, or usage-specific information, other than
customer information communicated for the purpose of publication or directory
database inclusion, 911, call processing, billing or settlement or as otherwise
mutually agreed upon; or (ii) 


<PAGE>   39

                                                    GENERAL TERMS AND CONDITIONS
                                                                    DTI - KANSAS
                                                                   PAGE 34 OF 42


in written, graphic, electromagnetic, or other tangible form and marked
at the time of delivery as "Confidential" or "Proprietary;" or (iii)
communicated orally and declared to the Receiving Party at the time of
delivery, or by written notice given to the Receiving Party within ten (10)
days after declaration to be "Confidential" or "Proprietary" (collectively
referred to as "Proprietary Information"), shall remain the property of the
Disclosing Party.

     31.6.2 Upon request by the Disclosing Party, the Receiving Party shall
return all tangible copies of Proprietary Information, whether written,
graphic, or otherwise. In the event of the expiration or termination of this
Agreement for any reason whatsoever, each Party shall return to the other Party
or destroy all Proprietary Information and other documents, work papers and
other material (including all copies thereof) obtained from the other Party in
connection with this Agreement.

     31.6.3 Each Party shall keep all the other Party's Proprietary Information
confidential in the same manner in which it keeps its own Proprietary
Information confidential, and shall use the other Party's Proprietary
Information only for performing the covenants contained in the Agreement and
shall disclose such Proprietary Information only to those employees,
contractors, agents or Affiliates who have a need to know. Neither Party shall
use the other Party's Proprietary Information for any other purpose except upon
such terms and conditions as may be agreed upon between the Parties in writing.

     31.6.4 Unless otherwise agreed, the obligations of confidentiality and
nonuse set forth in the Agreement do not apply to such Proprietary Information
that:

            (a)  was at the time of receipt, already known to the
                 Receiving Party, free of any obligation to keep confidential
                 and evidenced by written records prepared prior to delivery by
                 the Disclosing Party;

            (b)  is, or becomes publicly known through no wrongful
                 act of the receiving Party;

            (c)  is rightfully received from a third person having
                 no direct or indirect secrecy or confidentiality obligation to
                 the Disclosing Party with respect to such information;

            (d)  is independently developed by an employee, agent,
                 or contractor of the Receiving Party which individual is not
                 involved in any manner with the provision of services pursuant
                 to the Agreement and does not have any direct or indirect
                 access to the Proprietary Information;

            (e)  is disclosed to a third person by the Disclosing
                 Party without similar restrictions on such third person's
                 rights;

            (f)  is approved for release by written authorization
                 of the Disclosing Party;

<PAGE>   40

                                                    GENERAL TERMS AND CONDITIONS
                                                                    DTI - KANSAS
                                                                   PAGE 35 OF 42

            (g)  is required to be made public by the Receiving
                 Party pursuant to applicable law or regulation provided that
                 the Receiving party shall provide the Disclosing Party with
                 written notice of such requirement as soon as possible and
                 prior to such disclosure. The Disclosing Party may then either
                 seek appropriate protective relief from all or part of such
                 requirement or, if it fails to successfully do so, it shall be
                 deemed to have waived the Receiving Party's compliance with
                 Section 31.6 with respect to all or part of such requirement. 
                 The Receiving Party shall use all commercially reasonable 
                 efforts to cooperate with the Disclosing Party in attempting 
                 to obtain any protective relief which such Disclosing Party 
                 chooses to obtain. Notwithstanding the foregoing, SWBT shall 
                 be entitled to disclose confidential information on a 
                 confidential basis to regulatory agencies upon request for 
                 information as to SWBT's activities under the Act.

         31.6.5 Notwithstanding any other provision of this Agreement, the
Proprietary Information provisions of this Agreement shall apply to all
information furnished by either Party to the other in furtherance of the
purpose of this Agreement, even if furnished before the date of this Agreement.

         31.6.6 Pursuant to Section 222(b) of the Act, both parties agree to 
limit their use of Proprietary Information received from the other to the 
permitted purposed identified in the Act.

     31.7 GOVERNING LAW. For all claims under this Agreement that are based
upon issues within the jurisdiction (primary or otherwise) of the FCC, the
exclusive jurisdiction and remedy for all such claims shall be as provided for
by the FCC and the Act. For all claims under this Agreement that are based upon
issues within the jurisdiction (primary or otherwise) of the Commission, the
exclusive jurisdiction for all such claims shall be with such Commission, and
the exclusive remedy for such claims shall be as provided for by such
Commission. In all other respects, this Agreement shall be governed by the
domestic laws of the State of Missouri without reference to conflict of law
provisions.

     31.8 TAXES.

         31.8.1 Each Party purchasing services hereunder shall pay or 
otherwise be responsible for all federal, state, or local sales, use, excise, 
gross receipts, transaction or similar taxes, fees, or surcharges (hereinafter
"Tax") imposed on or with respect to the services provided by or to such Party,
except for any Tax on either party's corporate existence, status, or income. 
Whenever possible, these amounts shall be billed as a separate item on the 
invoice. To the extent a sale is claimed to be for resale tax exemption, the 
purchasing party shall furnish the providing party a proper resale tax exemption
certificate as authorized or required by statute or regulation by the
jurisdiction providing said resale tax exemption. 


<PAGE>   41

                                                    GENERAL TERMS AND CONDITIONS
                                                                    DTI - KANSAS
                                                                   PAGE 36 OF 42

Failure to timely provide said resale tax exemption certificate will
result in no exemption being available to the purchasing Party until such time
as the purchasing Party presents a valid certification. Failure to timely
provide said resale tax exemption certificate will result in no exemption being
available to the purchasing Party until such time as the purchasing Party
presents a valid certificate.

     31.8.2 With respect to any purchase of services, facilities or other
arrangements, if any Tax is required or permitted by applicable law to be
collected from the purchasing party by the providing party, then: (i) the
providing party shall bill the purchasing party for such Tax; (ii) the
purchasing party shall remit such Tax to the providing party; and (iii) the
providing party shall remit such collected Tax to the applicable taxing
authority.

     31.8.3 With respect to any purchase hereunder of services, facilities or
arrangements that are resold to a third party, if any Tax is imposed by
applicable law on the end user in connection with any such purchase, then: (i)
the purchasing party shall be required to impose and/or collect such Tax from
the end user; and (ii) the purchasing party shall remit such Tax to the
applicable taxing authority. The purchasing party agrees to indemnify and hold
harmless the providing party on an after-tax basis for any costs incurred by
the providing party as a result of actions taken by the applicable taxing
authority to collect the Tax from the providing party due to the failure of the
purchasing party to pay or collect and remit such tax to such authority.

     31.8.4 If the providing party fails to collect any Tax as required herein,
then, as between the providing party and the purchasing party: (i) the
purchasing party shall remain liable for such uncollected Tax; and (ii) the
providing party shall be liable for any penalty and interest assessed with
respect to such uncollected Tax by such authority. However, if the purchasing
party fails to pay any taxes properly billed, then, as between the providing
party and the purchasing party, the purchasing party will be solely responsible
for payment of the taxes, penalty and interest.

     31.8.5 If the purchasing party fails to impose and/or collect any Tax from
end users as required herein, then, as between the providing party and the
purchasing party, the purchasing party shall remain liable for such uncollected
Tax and any interest and penalty assessed thereon with respect to the
uncollected Tax by the applicable taxing authority. With respect to any Tax
that the purchasing party has agreed to pay or impose on and/or collect from
end users, the purchasing party agrees to indemnify and hold harmless the
providing party on an after-tax basis for any costs incurred by the providing
party as a result of actions taken by the applicable taxing authority to
collect the Tax from the providing Party due to the failure of the purchasing
party to pay or collect and remit such Tax to such authority.

  31.9 NON-ASSIGNMENT. This Agreement shall be binding upon every subsidiary
and Affiliate of either Party that is engaged in providing Telephone Exchange
and Exchange Access services in any territory within which SWBT is an Incumbent
Local Exchange Carrier as of the date of this Agreement (the "SWBT Territory")
and shall continue to be binding upon all such 


<PAGE>   42

                                                    GENERAL TERMS AND CONDITIONS
                                                                    DTI - KANSAS
                                                                   PAGE 37 OF 42


entities regardless of any subsequent change in their ownership. Each
Party covenants that, if it sells or otherwise transfers to a third party its
Telephone Exchange and Exchange Access network facilities within the SWBT
Territory, or any portion thereof, to a third party, it will require as a
condition of such transfer that the transferee agree to be bound by this
Agreement with respect to services provided over the transferred facilities.
Except as provided in this paragraph, neither Party may assign or transfer
(whether by operation of law or otherwise) this Agreement (or any rights or
obligations hereunder) to a third party without the prior written consent of the
other Party; provided that each Party may assign this Agreement to a corporate
Affiliate or an entity under its common control or an entity acquiring all or
substantially all of its assets or equity by providing prompt written notice to
the other Party of such assignment or transfer. Any attempted assignment or
transfer that is not permitted is void ab initio. Without limiting the
generality of the foregoing, this Agreement shall be binding upon and shall
inure to the benefit of the Parties' respective successors and assigns.

  31.10 NON-WAIVER. Failure of either Party to insist on performance of any
term or condition of this Agreement or to exercise any right or privilege
hereunder shall not be construed as a continuing or future waiver of such term,
condition, right or privilege.

  31.11 AUDITS. Each Party to this Agreement will be responsible for the
accuracy and quality of its data as submitted to the respective Parties
involved.

     31.11.1 Upon reasonable written notice and at its own expense, each Party
or its authorized representative (providing such authorized representative does
not have a conflict of interest related to other matters before one of the
Parties) shall have the right to conduct an audit of the other Party to give
assurances of compliance with the provisions of this Agreement; provided, that
neither Party may request more than two (2) such audits within any twelve (12)
month period. This includes on-site audits at the other Party's or the Party's
vendor locations. Each Party, whether or not in connection with an audit, shall
maintain reasonable records for a minimum of twenty-four (24) months and
provide the other Party with reasonable access to such information as is
necessary to determine amounts receivable or payable under this Agreement. Each
Party's right to access information for audit purposes is limited to data not
in excess of twenty-four (24) months in age.

  31.12 DISPUTED AMOUNTS.

     31.12.1 No claims, under this Agreement or its Appendices, shall be
brought for disputed amounts more than twenty-four (24) months from the date of
occurrence which gives rise to the dispute. Under this Section 30.12, if any
portion of an amount due to a Party (the "Billing Party") under this Agreement
is subject to a bona fide dispute between the Parties, the Party billed (the
"Non-Paying Party") shall within sixty (60) days of its receipt of the invoice
containing such disputed amount give notice to the Billing Party of the amounts
it disputes ("Disputed Amounts") and include in such notice the specific
details and reasons for disputing each item. The Non-Paying Party shall pay
when due: (i) all undisputed amounts to the Billing Party; and (ii) all
Disputed Amounts to Billing Party.

<PAGE>   43

                                                    GENERAL TERMS AND CONDITIONS
                                                                    DTI - KANSAS
                                                                   PAGE 38 OF 42

     31.12.2 If the Parties are unable to resolve the issues related to the
Disputed Amounts in the normal course of business within sixty (60) days after
delivery to the Billing Party of notice of the Disputed Amounts, each of the
Parties shall appoint a designated representative who has authority to settle
the dispute and who is at a higher level of management than the persons with
direct responsibility for administration of this Agreement. The designated
representatives shall meet as often as they reasonably deem necessary in order
to discuss the dispute and negotiate in good faith in an effort to resolve such
dispute.

     31.12.3 If the Parties are unable to resolve issues related to the
Disputed Amounts within forty-five (45) days after the Parties' appointment of
designated representatives pursuant to Section 31.12.2, above, then either
Party may file a complaint with the Commission to resolve such issues or
proceed with any other remedy pursuant to law or equity. The Commission may
direct release of any or all funds (including any accrued interest) in the
escrow account, plus applicable late fees, to be paid to either Party.

     31.12.4 The Parties agree that all negotiations pursuant to this Section
31.12 shall remain confidential and shall be treated as compromise and
settlement negotiations for purposes of the Federal Rules of Evidence and state
rules of evidence.

     31.12.5 Any undisputed amounts not paid when due shall accrue interest
from the date such amounts were due at the lesser of: (i) one and one-half
percent (1-1/2%) per month; or (ii) the highest rate of interest that may be
charged under applicable law.

  31.13 DISPUTE RESOLUTION.

     31.13.1 No claims shall be brought for disputes arising under this
Agreement or its Appendices more than twenty-four (24) months from the date of
occurrence which gives rise to the dispute.

     31.13.2 For disputes other than disputed amounts under this Agreement or
its Appendices, each Party shall appoint a designated representative as set
forth in Section 31.12.2, above, and if unable to resolve the dispute, proceed
as set forth in Section 31.12.3, above.

  31.14 NOTICES. Any notice to a Party required or permitted under this
Agreement shall be in writing and shall be deemed to have been received on the
date of service if served personally; on the date receipt is acknowledged in
writing by the recipient if delivered by regular mail; or on the date stated on
the receipt if delivered by certified or registered mail or by a courier
service that obtains a written receipt. Notice may also be provided by
facsimile, which shall be effective on the next Business Day following the date
of transmission as reflected in the facsimile confirmation sheet. "Business
Day" shall mean Monday through Friday, SWBT/DTI holidays excepted. Any notice
shall be delivered using one of the alternatives mentioned in this section and
shall be directed to the applicable address indicated below or such address as
the Party to be notified has designated by giving notice in compliance with
this section, except that 


<PAGE>   44

                                                    GENERAL TERMS AND CONDITIONS
                                                                    DTI - KANSAS
                                                                   PAGE 39 OF 42


notices to a Party's twenty-four (24) hour contact number shall be by 
telephone and/or facsimile and shall be deemed to have been received on the date
transmitted.

<TABLE>
<S>                                  <C>                  <C>
NOTICE CONTACT                       DTI CONTACT          SWBT CONTACT
- --------------                       -----------          ------------
NAME/TITLE                           Richard Weinstein    Jeffrey Fields
STREET ADDRESS                       11111 Dorsett Rd.    One Bell Plaza, 525.07
CITY, STATE, ZIPCODE                 St. Louis, MO 63043  Dallas, TX  75202
TELEPHONE NUMBER                     314-253-6600         214-464-5676
FAX NUMBER                           314-253-6699         214-464-1486

24-HOUR NETWORK MGMT CONTACT         DTI CONTACT          SWBT CONTACT
- ----------------------------         -----------          ------------
NAME/TITLE                           Alan Ducheck         NSMC Control
TELEPHONE NUMBER                     314-253-6600         1-800-792-2662
FAX NUMBER                           314-253-6699         1-972-301-6702
</TABLE>

  31.15 PUBLICITY AND USE OF TRADEMARKS OR SERVICE MARKS.

     31.15.1 The Parties agree not to use in any advertising or sales
promotion, press releases, or other publicity matters any endorsements, direct
or indirect quotes, or pictures implying endorsement by the other Party or any
of its employees without such Party's prior written approval. The Parties will
submit to each other for written approval, prior to publication, all publicity
matters that mention or display one another's name and/or marks or contain
language from which a connection to said name and/or marks may be inferred or
implied; the Party to whom a request is directed shall respond promptly.
Nothing herein, however, shall be construed as preventing either Party from
publicly stating the fact that it has executed this Agreement with the other
Party.

     31.15.2 Nothing in this Agreement shall grant, suggest, or imply any
authority for one Party to use the name, trademarks, service marks, or trade
names of the other for commercial purposes without prior written approval.

  31.16 SECTION 252(I) OBLIGATIONS. If either Party enters into an agreement
(the "Other Agreement") approved by the Commission or FCC pursuant to Section
252 of the Act (regardless of whether the approved agreement was negotiated or
arbitrated) which provides for the provision of arrangements covered in this
Agreement to another requesting Telecommunications Carrier, including an
Affiliate, such Party shall make available to the other Party such arrangements
upon the same rates, terms and conditions as those provided in the Other
Agreement. At its sole option, the other Party may avail itself of either: (i)
the Other Agreement in its entirety; or (ii) the prices, terms and conditions
of the Other Agreement that directly relate to any of the following duties as a
whole:

            (a)  Interconnection - Section 251(c)(2); 252(d)(1);
                 and 271(c)(2)(B(i) of the Act; or

<PAGE>   45

                                                    GENERAL TERMS AND CONDITIONS
                                                                    DTI - KANSAS
                                                                   PAGE 40 OF 42

            (b)  Exchange Access - Section 251(c)(2) and 271
                 (c)(2)(B)(ii) of the Act; or

            (c)  Unbundling - Section 251 (c)(3) and
                 271(c)(2)(B)(ii) of the Act; or

            (d)  Resale - Section 251(c)(4) and 271 (c)(2)(B)(xiv)
                 of the Act; or

            (e)  Collocation - Section 251(c)(6) and
                 271(c)(2)(B)(i) of the Act; or

            (f)  Number Portability - Section 251(b)(2) and
                 271(c)(2)(B)(xi) of the Act; or

            (g)  Database Access - Section 271(c)(2)(B)(x) of the
                 Act; or

            (h)  Access to Rights of Way - Section 251 (b)(4) and
                 271(c)(2)(B)(iii) of the Act; or

            (i)  Operator Services - Section
                 271(c)(2)(B)(vii)(III); or

            (j)  Directory Assistance - Section
                 271(c)(2)(B)(vii)(II).

     31.17 JOINT WORK PRODUCT. This Agreement is the joint work product of the
Parties and has been negotiated by the Parties and their respective counsel and
shall be fairly interpreted in accordance with its terms and, in the event of
any ambiguities, no inferences shall be drawn against either Party.

     31.18 INTERVENING LAW. This Agreement is entered into as a result of both
private negotiation between the Parties and the incorporation of some of the
results of arbitration by the Commission. If the actions of Kansas or federal
legislative bodies, courts, or regulatory agencies of competent jurisdiction
invalidate, modify, or stay the enforcement of laws or regulations that were
the basis for a provision of the contract which is reflective of the
Arbitration Award approved by the Commission, the affected provision shall be
invalidated, modified, or stayed, consistent with the action of the legislative
body, court, or regulatory agency. In such event, the Parties shall expend
diligent efforts to arrive at an agreement respecting the modifications to the
Agreement. If negotiations fail, disputes between the Parties concerning the
interpretation of the actions required or provisions affected by such
governmental actions shall be resolved pursuant to the dispute resolution
process provided for in this Agreement. The invalidation, stay, or modification
of the pricing provisions of the FCC's First Report and Order in CC Docket No.
9698 (August 8, 1996) and the FCC's Order on Reconsideration (September 27,
1996) shall not be considered an invalidation, stay, or modification requiring
changes to provisions of the Agreement required by the Commission Arbitration
Award, in that the FCC's pricing provisions are not the basis for the costing
and pricing provisions of the Commission's Arbitration Award.

     31.19 NO THIRD PARTY BENEFICIARIES; DISCLAIMER OF AGENCY. This Agreement
is for the sole benefit of the Parties and their permitted assigns, and nothing
herein express or implied shall create or be construed to create any
third-party beneficiary rights hereunder. Except for 


<PAGE>   46

                                                    GENERAL TERMS AND CONDITIONS
                                                                    DTI - KANSAS
                                                                   PAGE 41 OF 42


provisions herein expressly authorizing a Party to act for another, nothing in 
this Agreement shall constitute a Party as a legal representative or agent of 
the other Party, nor shall a Party have the right or authority to assume, 
create or incur any liability or any obligation of any kind, express or 
implied, against or in the name or on behalf of the other Party unless otherwise
permitted by such other Party. Except as otherwise expressly provided in this
Agreement, no Party undertakes to perform any obligation of the other Party,
whether regulatory or contractual, or to assume any responsibility for the
management of the other Party's business.

     31.20 NO LICENSE. No license under patents, copyrights or any other
intellectual property right (other than the limited license to use consistent
with the terms, conditions and restrictions of this Agreement) is granted by
either Party or shall be implied or arise by estoppel with respect to any
transactions contemplated under this Agreement.

     31.21 SURVIVAL. The Parties' obligations under this Agreement which by
their nature are intended to continue beyond the termination or expiration of
this Agreement shall survive the termination or expiration of this Agreement.

     31.23 SCOPE OF AGREEMENT. This Agreement is intended to describe and
enable specific Interconnection and compensation arrangements between the
Parties. This Agreement does not obligate either Party to provide arrangements
not specifically provided herein.

     31.24 ENTIRE AGREEMENT. The terms contained in this Agreement and any
Schedules, Exhibits, Appendices, tariffs and other documents or instruments
referred to herein, which are incorporated into this Agreement by this
reference, constitute the entire agreement between the Parties with respect to
the subject matter hereof, superseding all prior understandings, proposals and
other communications, oral or written. Neither Party shall be bound by any
preprinted terms additional to or different from those in this Agreement that
may appear subsequently in the other Party's form documents, purchase orders,
quotations, acknowledgments, invoices or other communications. This Agreement
may only be modified by a writing signed by an officer of each Party.

<PAGE>   47

                                                    GENERAL TERMS AND CONDITIONS
                                                                    DTI - KANSAS
                                                                   PAGE 42 OF 42

IN WITNESS WHEREOF, the Parties hereto have caused this Agreement to be
executed as of this 21 day of August, 1997.

DIGITAL TELEPORT, INC.           SOUTHWESTERN BELL TELEPHONE COMPANY
Signature: /s/ J.W. Sheehy       Signature: /s/ Larry B. Cooper
          ------------------               ---------------------
Name: J. W. SHEEHY               Name: Larry B. Cooper
     -----------------------           -------------------------
     (Print or Type)                   (Print or Type)
Title: Vice President IC         Title: General Manager-Competitive Provider
       Support                          Account Team
      ----------------------           -------------------------------------
      (Print or Type)                  (Print or Type)

<PAGE>   48
                                                                   APPENDIX 800
                                                                   PAGE 2 OF 7

                                  Appendix 800

                    ACCESS TO THE TOLL FREE CALLING DATABASE

This Appendix sets forth the terms and conditions under which SWBT provides
Access to the Toll Free Calling Database.

I.       DESCRIPTION

         A.       SWBT's 800 database, an ANSI SS7 call-related database system,
                  receives updates processed from the national Service
                  Management System (SMS). Customer records in the SMS are
                  created or modified by entities known as Responsible
                  Organizations (RespOrg) who obtain access to the SMS via the
                  800 Service Management System, Tariff F.C.C. No. 1. 800
                  Service Providers must either become their own RespOrg or use
                  the services of an established RespOrg. The services of a
                  RespOrg includes creating and updating 800 records in the SMS
                  to download in the 800 database(s). SWBT does not, either
                  through a tariff or contract, provide RespOrg service.

         B.       After the 800 customer record is created in the SMS, the SMS
                  downloads the records to the appropriate databases, depending
                  on the area of service chosen by the 800 subscriber. An 800
                  customer record is created in the SMS for each 800 number to
                  be activated. The SMS initiates all routing changes to update
                  information on a nationwide basis.

         C.       Access to the Toll Free Calling Database allows an LSP to
                  access SWBT's 800 database for the purpose of switch query and
                  database response. Access to the Toll Free Calling Database
                  supports the processing of toll free calls (e.g., 800 and 888)
                  where identification of the appropriate carrier (800 Service
                  Provider) to transport the call is dependent upon the full ten
                  digits of the toll free number (e.g., 1+800+NXX+XXXX). Access
                  to the Toll Free Calling Database includes all 800-type
                  dialing plans (i.e., 800 and 888 [and 877, 866, 855, 844, 833,
                  822, when available]).

         D.       Access to the Toll Free Calling Database provides the carrier
                  identification function required to determine the appropriate
                  routing of an 800 number based on the geographic origination
                  of the call, from a specific or any combination of NPA/NXX,
                  NPA or LATA.

         E.       There are three optional features available with 800 service:
                  Designated 10-Digit Translation, Call Validation and Call
                  Handling and Destination.

                  1.       The Designated 10-Digit Translation feature converts
                           the 800 number into a designated 10-digit number. If
                           the 800 Service Provider provides the designated
                           10-digit number associated with the


<PAGE>   49
                                                                   APPENDIX 800
                                                                   PAGE 3 OF 7

                                   800 number and requests delivery of the
                                   designated 10-digit number in place of the 
                                   800 number, SWBT will deliver the 
                                   designated 10-digit number.

                           2.      The Call Validation feature limits calls to 
                                   an 800 number to calls originating only 
                                   from an 800 Subscriber's customized service
                                   area. Calls originating outside the area 
                                   will be screened and an out of band 
                                   recording will be returned to the calling
                                   party.

                           3.      The Call Handling and Destination feature 
                                   allows routing of 800 calls based on one or 
                                   any combination of the following: time of 
                                   day, day of week, percent allocation and 
                                   specific 10 digit ANI.

         II.      TERMS AND CONDITIONS

                  A.       Access to the Toll Free Calling Database provided
                           under these terms and conditions is only available
                           for use in the provision of telephone exchange and
                           exchange access telecommunications services as
                           specified in the Telecommunications Act of 1996 and
                           any effective rules and regulations of the Federal
                           Communications Commission and the state Public
                           Service Commission.

                  B.       Access to the Toll Free Calling Database is offered
                           separate and apart from other unbundled network
                           elements necessary for operation of the network
                           routing function addressed in these terms and
                           conditions, e.g., end office 800 SSP functionality
                           and CCS/SS7 signaling. This appendix is separate from
                           the prices, terms, conditions and billing for such
                           related elements, and in no way shall this appendix
                           be construed to circumvent the prices, terms,
                           conditions or billing as specified for such related
                           elements.

                  C.       LSP shall address its queries to SWBT's database to
                           the alias point code of the STP pair identified by
                           SWBT. LSP's queries shall use subsystem number 0 in
                           the calling party address field and a translations
                           type of 254 with a routing indicator set to route on
                           global title. LSP acknowledges that such subsystem
                           number and translation type values are necessary for
                           SWBT to properly process queries to its 800 database.

                  D.       Each Party warrants to the other that it shall send
                           queries and SS7 messages conforming to the ANSI
                           approved standards for SS7 protocol and pursuant to
                           the Specifications and Standards documents attached
                           and incorporated herein in Exhibit I. Both Parties
                           acknowledge that transmission in said protocol is
                           necessary for each Party to provision Access to the
                           Toll Free Calling Database (or the equivalent
                           thereof). Each Party reserves the right to modify its
                           network pursuant to other specifications and
                           standards, which may include Bellcore Specifications
                           defining specific service applications, message types
                           and formats, that
<PAGE>   50
                                                                   APPENDIX 800
                                                                   PAGE 4 OF 7

                           may become necessary to meet the prevailing demands
                           within the U.S. telecommunications industry. All such
                           changes shall be announced in accordance with the
                           then prevailing industry standard procedures. Each
                           party shall work cooperatively to coordinate any
                           necessary changes.

                  E.       LSP acknowledges and agrees that CCS/SS7 network
                           overload due to extraordinary volumes of queries
                           and/or other SS7 network messages can and will have a
                           detrimental effect on the performance of SWBT's
                           CCS/SS7 network and its 800 database. LSP further
                           agrees that SWBT, at its sole discretion, may employ
                           certain automatic and/or manual overload controls
                           within SWBT's CCS/SS7 network to guard against these
                           detrimental effects. SWBT shall report to the LSP any
                           instances where overload controls are invoked due to
                           the LSP's CCS/SS7 network. LSP shall take immediate,
                           corrective actions as are necessary to cure the
                           conditions causing the overload situation.

                  F.       During periods of 800 database system congestion,
                           SWBT shall utilize an automatic code gapping
                           procedure to control congestion that may affect the
                           service of all customers of SWBT's 800 database. The
                           automatic code gapping procedure used by SWBT shall
                           tell LSP's switch the gap (how long LSP's switch
                           should wait before sending another query) and the
                           duration (how long the switch should continue to
                           perform gapping). For example, during an overload
                           condition, the automatic code gapping procedure shall
                           tell SWBT's 800 database when to begin to drop one
                           out of three queries received. This code gapping
                           procedure shall be applied uniformly to all users of
                           SWBT's 800 database. SWBT reserves the right to
                           manually invoke the automatic code gapping procedure
                           to control congestion.

                  G.       Prior to SWBT initiating service under this Appendix,
                           LSP shall provide an initial forecast of busy hour
                           query volumes. LSP shall update its busy hour
                           forecast for each upcoming calendar year (January -
                           December) by October 1 of the preceding year. LSP
                           shall provide such updates each year for the first
                           three (3) years of this Appendix. If, prior to the
                           establishment of a mutually agreeable service
                           effective date, in writing, SWB, at its discretion,
                           determines that it lacks adequate processing
                           capability to provide Access to the Toll Free Calling
                           Database to LSP, SWBT shall notify LSP of SWBT's
                           intent not to provide the services under this
                           Appendix and this Appendix will be void and have no
                           further effect.

                  H.       LSP shall from time to time at SWBT's request,
                           provide additional forecasted information as deemed
                           necessary by SWBT for network planning in connection
                           with this offering.

                  I.       SWBT shall test the Access to the Toll Free Calling
                           Database in conjunction with CCS/SS7 Interconnection
                           Service (e.g., SS7 Appendix)


<PAGE>   51
                                                                   APPENDIX 800
                                                                   PAGE 5 OF 7

                           as outlined in Bellcore Technical References
                           TR-NWT-000533, TR-NWT-000954, TR-TSV-000905, and TP
                           76638.

                  J.       LSP shall only use Access to the Toll Free Calling
                           Database to determine the routing requirements for
                           originating 800 calls. Neither the LSP nor carrier
                           customers of the LSP if the LSP is acting on behalf
                           of other carriers, shall use the database information
                           to copy, store, maintain or create any table or
                           database of any kind or for any purpose. If the LSP
                           acts on behalf of other carriers to access SWBT's
                           Toll Free Calling Database, LSP shall prohibit such
                           carriers from copying, storing, maintaining, or
                           creating any table or database of any kind from any
                           response provided by SWBT after a query to SWBT's
                           Toll Free Calling Database. LSP shall only use this
                           network element in connection with the provision of
                           telephone exchange and exchange access services.

                  K.       LSP shall ensure that it has sufficient link capacity
                           and related facilities to handle its signaling and
                           toll free traffic without adversely affecting other
                           network subscribers.

                  L.       SWBT shall provide Access to the Toll Free Calling
                           Database as set forth in this Appendix only as such
                           elements are used for LSP's activities on behalf of
                           its Kansas local service customers where SWBT is the
                           incumbent local exchange carrier. LSP agrees that any
                           other use of SWBT's Toll Free Calling Database for
                           the provision of 800 database service by LSP will be
                           pursuant to the terms, conditions, rates, and charges
                           of SWBT's effective tariffs, as revised, for 800
                           database services.
                                                              
                  M.       This Appendix shall become effective on _____________
                           and shall continue for one (1) year from the 
                           effective date of implementation of Access to the 
                           Toll Free Calling Database. Thereafter, this 
                           Appendix shall remain in effect unless terminated 
                           by either party upon written notice given sixty 
                           (60) days in advance of the termination date.

                  N.       Ordering and billing inquiries for the elements
                           described herein shall be directed to the Local
                           Service Provider Service Center (LSPSC). Ordering
                           shall be done through the LSPSC using the standard
                           LSP order form and SWBT CCS7-2 Form, if applicable.

         III.     RATE REGULATIONS

                  A.       LSP shall pay a Local Service Order Request Charge
                           for each LSP request for service order activity to
                           establish Access to the Toll Free Calling Database.

                  B.       LSP shall pay the rates for Access to the Toll Free
                           Calling Database, as described in Section III D.
                           These rates and charges will apply for one (1)


<PAGE>   52
                                                           APPENDIX 800
                                                           PAGE 6 OF 7
                   
                   year from the service effective date for each
                   exchange. After one (1) year, SWBT may change the
                   rates upon sixty (60) days' notice. SWBT may first
                   give such notice sixty days before the end of the
                   first year.
                   
              C.   LSP shall pay a nonrecurring charge when an LSP
                   establishes or changes a signaling point code. The
                   rates and charges for Signaling Point Code(s) are
                   described in the SS7 Appendix. This charge also
                   applies to point code information provided by LSPs
                   allowing other telecommunications providers to use
                   the LSP's SS7 signaling network.
                   
              D.   Prices for the four rate elements associated with
                   Access to the Toll Free Calling Database are as
                   follows:
                   
                   1.  Toll Free Database Query Rate Element          $0.001020
                   2.  Designated 10-Digit Translation Rate Element        NC
                   3.  Call Validation Rate Element                        NC
                   4.  Call Handling and Destination Rate Element     $0.000140
                   
              E.   LSP shall pay the Toll Free Database query rate for
                   each query received and processed by SWB's database.
                   When applicable, the charge for the additional
                   features (Designated 10-Digit Translation, Call
                   Validation and Call Handling and Destination) are per
                   query and in addition to the Toll Free Database query
                   charge, and will also be paid by LSP.
                   
     IV.      MONTHLY BILLING
     
                   SWBT shall render monthly billing statements to the
                   LSP, and remittance in full will be due within thirty
                   (30) days of receipt.
     


<PAGE>   53
                                                                   APPENDIX 800
                                                                   PAGE 7 OF 7


                                  APPENDIX 800
                                    EXHIBIT I

                          SPECIFICATIONS AND STANDARDS

Description of Subject Area
and Issuing Organization                                 Document Number


Bellcore, SS7 Specifications

                                                         TR-NWT-000246

                                                         TR-NWT-000271

                                                         TR-NWT-000533

Bellcore, CCS Network Interface Specifications

                                                         TR-TSV-000905

                                                         TP 76638

                                                         TR-NWT-000954



<PAGE>   54
                                                              APPENDIX 911-MOKA
                                                                    PAGE 2 OF 4


                              APPENDIX 911- KANSAS

                  Terms and Conditions for Providing Connection
                   to E911 Universal Emergency Number Service

This appendix between SWBT and LSP sets forth the terms and conditions upon
which SWBT will provide LSP's connection to E911 Universal Emergency Number
Service.

DEFINITIONS

The following definition is in addition to those in the Kansas General Exchange
Tariffs referenced below:

         Independent Exchange Company (IEC): A local exchange telephone company,
         including Local Service Providers (LSPs) who are certified by the state
         commission, other than Southwestern Bell Telephone Company. An IEC may
         also be a customer for Universal Emergency Number Service in order to
         provide that service or elements of that service to legally authorized
         agencies within the IEC's serving area.

TERMS AND CONDITIONS

The following is in addition to those terms and conditions in the Kansas General
Exchange Tariffs referenced below:

         The Universal Emergency Number Service may be provided by Southwestern
         Bell Telephone Company or jointly by Southwestern Bell Telephone
         Company and an IEC.

         SWBT shall provide LSP with a file containing the Master Street Address
         Guide (MSAG) for the exchanges or communities specified in Exhibit I,
         in accordance with the methods and procedures described in the document
         "Operating Methods for Downloading and Maintaining End User Records in
         SWBT's DBMS". SWBT shall provide LSP additional files with the entire
         MSAG, including subsequent additions or updates to the MSAG in
         accordance with the intervals specified in Exhibit I. In addition, SWBT
         shall provide LSP with a statistical report in a timely fashion and in
         accordance with the methods and procedures described in the above
         mentioned document, for each file downloaded by LSP to SWBT's DBMS, so
         that LSP may ensure the accuracy of the end user records. LSP will
         attest it has been provided a copy of the document referenced above.

         At a reasonable time prior to the establishment of E911 Service, LSP
         shall download and maintain thereafter all information required to
         establish records


<PAGE>   55
                                                              APPENDIX 911-MOKA
                                                                    PAGE 3 OF 4


         necessary for furnishing connection to E911 Service and shall promptly
         notify SWBT in writing of any changes to be made to such records. LSP
         shall adopt and comply with operating methods applicable to downloading
         and maintaining LSP's end user records in SWBT's DBMS, as set forth in
         the document referenced in the paragraph above.

         LSP acknowledges that its end users in a single local calling scope may
         be served by different PSAPs, and LSP shall be responsible for
         providing facilities to route calls from its end users to the proper
         E911 Control Office(s).

         LSP shall connect its switches to the E911 Control Office by one-way
         outgoing CAMA trunks dedicated for originating 911 emergency service
         calls.

         The parties agree that the E911 service is provided for the use of the
         E911 Customer, and recognizes the authority of the E911 Customer to
         establish service specifications and grant final approval (or denial)
         of service configurations offered by SWBT and the LSP. The terms and
         conditions of this appendix represent a plan for providing E911
         service, for which LSP must obtain documentation of approval from the
         appropriate E911 Customer(s) which have jurisdiction in the area(s) in
         which LSP's customers are located. LSP shall provide such documentation
         to SWBT prior to the use of LSP's E911 connection for actual emergency
         calls.

         Both parties agree to designate a representative who shall have the
         authority to execute additional exhibits to this Appendix when
         necessary to accommodate expansion of the geographic area of LSP into
         the jurisdiction of additional PSAPs or to increase the number of CAMA
         trunks. The designated representative for SWBT is Jeff Fields and for
         LSP is Richard Weinstein.

         The terms and conditions of this appendix are subject to renegotiation
         in the event that the E911 Customer orders changes to the E911 service
         that necessitate revision of this appendix.

RATES, TERMS AND CONDITIONS

E911 Universal Emergency Number Service will be provided utilizing the rates,
terms and conditions set forth in the following Kansas tariff, in addition to
those terms and conditions described previously in this Appendix:

         SWBT's General Exchange Tariff Section 19 - Universal Emergency Number
         Service (911)



<PAGE>   56
                                                              APPENDIX 911-MOKA
                                                                    PAGE 4 OF 4



                           EXHIBIT I TO APPENDIX 9-1-1



<TABLE>
<CAPTION>

         LSP SERVING AREA DESCRIPTION AND E9-1-1 INTERCONNECTION DETAILS
- ----------------------------------------------------------------------------------------------------------------------
- ----------------------------------------------------------------------------------------------------------------------
<S>                            <C>            <C>                    <C>                       <C>
LSP NAME & CONTACTS            LSP "OCN"      LSP Switch Name & Addr.        Switch Type       LSP NPA/NXX(s) included
- ----------------------------------------------------------------------------------------------------------------------
- ----------------------------------------------------------------------------------------------------------------------
                                                                              CLLI Code        #9-1-1 Trunks Requested
- ----------------------------------------------------------------------------------------------------------------------
E9-1-1 Manager                LSP Telco ID
- ----------------------------------------------------------------------------------------------------------------------
                                                                     "Connect Signal" Digits(4)     "Default" PSAP
- ----------------------------------------------------------------------------------------------------------------------
                                                                                1 - 1
- ----------------------------------------------------------------------------------------------------------------------
Database Administrator                        Estimated # of EAAs             ETST Code
- ----------------------------------------------------------------------------------------------------------------------
                            LSP Service Area Definition:
- ----------------------------                                         -------------------------------------------------
Switch Site Contact
- ----------------------------                                         -------------------------------------------------
</TABLE>







<TABLE>
<CAPTION>
 SWBT E9-1-1 SYSTEM CONFIGURATION ASSOCIATED WITH DESIGNATED E9-1-1 CONTROL OFFICE
- ----------------------------------------------------------------------------------------------------------------------
- ----------------------------------------------------------------------------------------------------------------------
<S>                                              <C>                      <C>                  <C>
E9-1-1 CONTROL OFFICE:                           PSAPs INCLUDED IN            COMMUNITY          E9-1-1 CUSTOMER and
- --------------------------------------------
        CLLI Code:                               9-1-1 SERVICE PLAN       for MSAG PULL(3)     AGENCY TYPE(see legend below)
- ----------------------------------------------------------------------------------------------------------------------
- ----------------------------------------------------------------------------------------------------------------------
E9-1-1 Features Required:
- ----------------------------------------------------------------------------------------------------------------------
- ----------------------------------------------------------------------------------------------------------------------
# of 9-1-1 Trunks from LSP:
- ----------------------------------------------------------------------------------------------------------------------
- ----------------------------------------------------------------------------------------------------------------------
MSAG Update Interval:       Monthly
- ----------------------------------------------------------------------------------------------------------------------
- ----------------------------------------------------------------------------------------------------------------------
- ----------------------------------------------------------------------------------------------------------------------
- ----------------------------------------------------------------------------------------------------------------------
           FOOTNOTES:  (1)
- ----------------------------------------------------------------------------------------------------------------------
- ----------------------------------------------------------------------------------------------------------------------
- ----------------------------------------------------------------------------------------------------------------------
                       (2)
- ----------------------------------------------------------------------------------------------------------------------
- ----------------------------------------------------------------------------------------------------------------------
- ----------------------------------------------------------------------------------------------------------------------
                       (3) MSAG will only include addresses within SWBT
- ----------------------------------------------------------------------------------------------------------------------
                            exchanges, unless specifically stated otherwise.
- ----------------------------------------------------------------------------------------------------------------------
- ----------------------------------------------------------------------------------------------------------------------
                       (4) Refer to network interface specifications in Exhibit III.
- ----------------------------------------------------------------------------------------------------------------------
- ----------------------------------------------------------------------------------------------------------------------
"TYPE of AGENCY" LEGEND:                 -----------------------------------------------------------------------------
                       HRC  = Home Rule City
- ----------------------------------------------------------------------------------------------------------------------
                       ECD  = Emergency Communications District
- ----------------------------------------------------------------------------------------------------------------------
                       COG  = Council of Governments or Regional Planning Commission
- ----------------------------------------------------------------------------------------------------------------------
                       GLC  = General Law City
- ----------------------------------------------------------------------------------------------------------------------
                      Cnty  = County with special provisions (only applies to Dallas County)
- ----------------------------------------------------------------------------------------------------------------------

                                                                                                Date Prepared
- ----------------------------------------------------------------------------------------------------------------------
</TABLE>






<PAGE>   57

<PAGE>   58
                                                                    APPENDIX AIN
                                                                    PAGE 2 OF 2


                                  APPENDIX AIN

                            AIN CALL RELATED DATABASE

AIN is a Network Architecture that uses distributed intelligence in centralized
databases to control call processing and manage network information, rather than
performing those functions at every switch.

SWBT will provide LSP access to the SWBT's Service Creation Environment (SCE) to
design, create, test and deploy AIN-based features, equivalent to the access it
provides to itself, providing that security arrangements can be made. LSP
requests to use the SWBT SCE will be subject to request and review procedures to
be agreed upon by the Parties.

When LSP utilizes SWBT's Local Switching network element and requests SWBT to
provision such network element with a technically feasible AIN trigger, SWBT
will provide access to the appropriate AIN Call Related Database for the purpose
of invoking either an SWBT AIN feature or a LSP developed AIN feature as per
previous section.

When LSP utilizes its own local switch, SWBT will provide access to the
appropriate AIN Call Related Database for the purpose of invoking either an SWBT
AIN feature or a LSP developed AIN feature as per previous section.

SWBT will provide access to AIN Call Related databases in a nondiscriminatory
and competitively neutral manner. Any mediation, static or dynamic, will only
provide network reliability, protection, security and network management
functions consistent with the access service provided. Any network management
controls found necessary to protect the AIN SCP from an overload condition will
be applied based on nondiscriminatory guidelines and procedures either (1)
resident in the SWBT STP that serves the appropriate AIN SCP or (2) via manual
controls that are initiated from SWBT Network Elements. Such management controls
will be applied to the specific problem source, where ever that source is,
including SWBT, and not to all services unless a problem source cannot be
identified.

As requested by LSP, SWBT will provide specifications and information reasonably
necessary for LSP to utilize SWBT SCE as provided above.

SWBT SCP will partition and take reasonable steps to protect LSP service logic
and data from unauthorized access, execution or other types of compromise, where
technically feasible.



<PAGE>   59


                                                                  APPENDIX BCR
                                                                   PAGE 2 OF 5




                                  APPENDIX BCR
                        BILLING, COLLECTING AND REMITTING

This Appendix sets forth the terms and conditions that apply to those
telecommunications services for which charges are billed and collected by one
Local Exchange Carrier (LEC) or LSP but earned by another LEC; and to establish
procedures for the billing, collecting and remitting of such charges and for
compensation for the services performed in connection with the billing,
collecting and remitting of such charges.

I.       DEFINITIONS

         A.       BellCore Client Company Calling Card and Third Number
                  Settlement (BCC CATS) System - Nationwide system used to
                  produce information reports that are used in the settlement of
                  LEC revenues recorded by one BCC (or LEC) and billed to an end
                  user of another BCC (or LEC) as described in accordance with
                  the BellCore Practice BR 981-200-110.

         B.       Charges - the amount approved or allowed by the appropriate
                  regulatory authority to be billed to an end user for any of
                  the services described in Section II., rendered by a LEC to an
                  end user.

         C.       Compensation - the amount to be paid by one Party to the other
                  Party for billing, collecting and remitting of charges as set
                  forth in Section IV.

         D.       IntraLATA - within a Local Access Transport Area (LATA) -
                  IntraLATA messages are those messages, either intrastate or
                  interstate, which originate and terminate within a LATA. The
                  term "IntraLATA messages," as used herein, shall only include
                  those that qualify for the BellCore Client Company BCC CATS
                  process.

         E.       InterLATA - between Local Access and Transport Areas (LATAs)
                  as defined in the FCC's CC Docket No. 78-72. InterLATA
                  messages are those messages which originate in one LATA and
                  terminate in a different LATA. The term "InterLATA messages"
                  as used herein, shall only include those that qualify for the
                  BellCore Client Company BCC CATS process.

         F.       Local Exchange Carrier (LEC) - as used in this Appendix shall
                  mean those Local Exchange Carriers or Local Service Providers
                  using BCC CATS as a message tracking system.

         G.       Local Message - Local messages are those messages which
                  originate and terminate within the area defined as the local
                  service area of the station from which the message originates.

         H.       Revenues - the sum of all or part of the charges as defined 
                  above.


<PAGE>   60

                                                                   APPENDIX BCR
                                                                    PAGE 3 OF 5



II.      SCOPE OF APPENDIX

         This Appendix shall apply to procedures for the billing, collecting and
         remitting of revenues (and compensation to either Party for billing,
         collecting and remitting of such revenues) derived from the following
         services:

         A.       LEC - carried (traffic transported by facilities belonging to
                  a LEC) local messages of the following types:

                  1.   Local Message Service Charges Billed to a Calling Card or
                       to a Third Number.

                  2.   Directory Assistance Calls Charged to a Calling Card or
                       to a Third Number.

                  3.   Public Land Mobile Radiotelephone Transient-Unit Local
                       Message Service (Mobile Channel Usage Link Charge).

                  4.   Maritime Mobile Radiotelephone Service and Aviation
                       Radiotelephone Service (Marine, Aircraft, High Speed
                       Train Radio Link Charges).

         B.       LEC-carried Interstate IntraLATA and Interstate InterLATA
                  telecommunications services that qualify for and flow through
                  the BCC CATS process as addressed in the BellCore Practice BR
                  981-200-110, of the following types:

                  1.   Interstate IntraLATA Toll Service carried by an LEC and
                       charged to a Calling Card or a Third Number.

                  2.   Interstate InterLATA Toll Service carried by an LEC and
                       charged to a Calling Card or a Third Number.

                  3.   Radio Link Charges where service is provided by one LEC
                       and billed by another LEC.

III.     RESPONSIBILITIES OF THE PARTIES

         A.      LSP agrees to bill, collect and remit to SWBT the charges for
                 the services described in Section II. which charges are earned
                 by any LEC (including SWBT), but which are to be billed to end
                 users of the LSP.

         B.      In those cases in which the charges for the services listed in
                 Section II. are due any LEC other than SWBT, SWBT will arrange
                 to transfer these and charges to the appropriate company in
                 accordance with accepted industry standards.
<PAGE>   61

                                                                APPENDIX BCR
                                                                 Page 4 of 5

         C.      Charges for the services listed in Section II. to be billed,
                 collected and by LSP for SWBT's benefit, shall be remitted by
                 LSP to SWBT within 30 days of the date of SWBT's bill to LSP
                 for such services.

         D.      SWBT agrees to bill and collect (or to have another LEC bill
                 and collect, where the appropriate), and to remit to LSP, the
                 charges for the services described in Section II., which
                 charges are earned by LSP, but which are to be billed by
                 another LEC (including SWBT) to the end users of that LEC.

         E.      Charges for the services listed in Section II. to be billed,
                 collected and remitted by SWBT or another LEC for LSP's
                 benefit, shall be remitted by SWBT to LSP within 30 days of the
                 date of LSP's bill to SWBT for such services.

         F.      The full amount of the charges transmitted to either Party for
                 billing, collecting and remitting shall be remitted by the
                 other Party, without setoff, abatement or reduction for any
                 purpose, other than to deduct the compensation, as described in
                 Section IV, due the Party for performing the end user billing
                 function. The Party billing the end user shall be responsible
                 for all uncollectible amounts related to the services described
                 remitted in Section II. Notwithstanding this paragraph, SWBT
                 may net amounts due to LSP under this Appendix against amounts
                 owed to SWBT when SWBT renders a bill to LSP hereunder.

         G.      Each Party will furnish to the other such information as may be
                 required for monthly billing and remitting purposes.

IV.      COMPENSATION

         A Party performing the services described in Section II. A. will
         compensate the other Party in the amount of $.08 for each charge billed
         for any service described in Section II.A. and subsequently remitted
         pursuant to this Appendix by such other Party to the Party performing
         the services described in Section II. A. A Party performing the
         services described in Section II. B. will compensate the other Party in
         the amount of $.05 for each charge billed for any service described in
         Section II. B. and subsequently remitted pursuant to this Appendix by
         such other Party to the Party performing the services described in
         Section II. B. Such compensation shall be paid (unless a Party has
         collected such compensation as described in Section III.F. above)
         within 30 days of the date of a bill for such compensation by the Party
         performing (or which has another LEC perform for it), the billing,
         collecting and remitting functions described in Section III.

V.       SWBT MAKES NO REPRESENTATIONS OR WARRANTIES, EXPRESS OR IMPLIED,
         INCLUDING BUT NOT LIMITED TO ANY WARRANTY AS TO MERCHANTABILITY OR
         FITNESS FOR INTENDED OR PARTICULAR PURPOSE WITH RESPECT TO SERVICES
         PROVIDED HEREUNDER. ADDITIONALLY, SWBT ASSUMES NO RESPONSIBILITY WITH
         REGARD TO THE

<PAGE>   62
                                                                  APPENDIX BCR
                                                                   Page 5 of 5

CORRECTNESS OF THE DATA SUPPLIED BY LSP WHEN THIS DATA IS ACCESSED AND USED BY A
THIRD PARTY.



<PAGE>   63

                                                                   APPENDIX CH
                                                                   PAGE 2 OF 4

                           APPENDIX CLEARINGHOUSE (CH)

WHEREAS, SWBT operates a Clearinghouse (CH), as described below, for its own
behalf and that of participating LECs and LSPs, including LSP; and

WHEREAS, LSP wants to participate in the CH on the terms set forth herein;

The Parties agree to the following:

1.       CLEARINGHOUSE DESCRIPTION

         SWBT operates a CH for the purpose of facilitating the exchange of
         certain alternatively billed intrastate intraLATA message toll call
         records and the reporting of settlement revenues owed by and among
         participating LECs and LSPs, including SWBT and LSP.

2.       QUALIFYING MESSAGE CRITERIA

         The only toll call messages that qualify for submission to SWBT for CH
         processing are: (a) intrastate intraLATA sent collect (including
         calling card, collect and third number) messages which are originated
         in one LEC or LSP exchange, exclusively carried by a LEC or LSP over
         LEC or LSP facilities and billed to a customer located in a second
         LEC's or LSP exchange within the same state; or (b) intrastate
         intraLATA sent collect (but limited to calling card and third number)
         messages originated in one of SWBT's operating areas (located in parts
         of Texas, Arkansas, Kansas, Missouri or Oklahoma), exclusively carried
         by a LEC or LSP over LEC or LSP facilities, and billed to a customer
         located in a second LEC's or LSP exchange and not in the originating
         State.

3.       RESPONSIBILITIES OF THE PARTIES

A.       LSP agrees that it will provide SWBT with billing records for CH
         processing that are in an industry standard format acceptable to SWBT
         and at a minimum will display the telephone number of the end user to
         whom the call is to be billed, and data about the call sufficient for a
         carrier to comply with all applicable state regulatory requirements.
         For purposes of this Attachment, these records ("CH Records") will
         detail intraLATA toll calls which were originated by use of the single
         digit access code (i.e., 0+ and 0-) in one LEC or LSP exchange but are
         to be billed to an end user in a second LEC's or LSP exchange. Such
         records are referred to as category 92 records for CH processing
         purposes. The term "CH Record" will mean the call detail attributed to
         a single completed toll message.

         LSP agrees that all CH Records it generates will display indicators
         denoting whether category 92 Records should be forwarded to SWBT's CH.
         LSP will retain its originating



<PAGE>   64
                                                                   APPENDIX CH
                                                                   PAGE 3 OF 4



         records for ninety (90) days such that the category 92 Records can be
         retransmitted to SWBT for CH processing, if needed.

B.       SWBT will provide and maintain such systems as it believes are required
         to furnish the CH service described herein. SWBT, in its capacity as
         operator of the CH, agrees to retain all CH Records processed through
         the CH for two (2) years.

C.       LSP will timely furnish to SWBT all CH Records required by SWBT to
         provide the CH service in accordance with the Technical Exhibit
         Settlement Procedures (TESP) dated DD/MM/YEAR, or as otherwise mutually
         agreed upon by the Parties. SWBT will provide the CH service in
         accordance with the TESP, and such modifications as are subsequently
         agreed upon.

D.       Presently, in operating the CH, SWBT relies upon NXX codes to identify
         messages for transmission to participating billing companies. To the
         extent any subprocesses are required to settle CH messages due to the
         use of ported numbers, such subprocessing will be the responsibility of
         the porting entity.

4.       PROCESSING CHARGE

         LSP agrees to pay SWBT a processing charge in consideration of SWBT's
         performance of CH services. This charge is $.02 per originated CH
         Record processed on behalf of LSP.

5.       BILLING CHARGE

         LSP agrees to pay a $.05 per message charge to the LEC or LSP
         responsible for billing the message, including SWBT, when SWBT bills
         the message.

6.       SETTLEMENT REPORT

         SWBT will issue monthly reports containing the results of the
         processing of CH Records to each participating LEC and LSP. These
         reports list the (a) amounts owed by LSP for billing messages
         originated by others; (b) amounts due to LSP for LSP-originated
         messages billed by others; (c) applicable billing charges; and (d)
         processing charges.

7.       RETROACTIVE AND LOST MESSAGES

         The Parties agree that processing of retroactive messages through the
         CH is acceptable, if such messages utilize the industry standard format
         for call records, pursuant to Section 3 of this Attachment. The Parties
         agree that lost messages are the complete responsibility of the
         originating LEC or LSP. If messages are lost by any Party, and cannot
         be





<PAGE>   65
                                                                   APPENDIX CH
                                                                   PAGE 4 OF 4

         recreated or retransmitted, the originating LEC or LSP will estimate
         messages, minutes, and associated revenues based on the best available
         data. No estimate will be made for messages which are more than two
         years old at the time the estimate is made. The estimates will be
         off-line calculations (i.e., not part of the routine CH processing) and
         will be included as a supplement to the monthly settlement report.

8.       LIMITATION OF LIABILITY

         By agreeing to operate the CH, SWBT assumes no liability for any LEC's
         or LSP's receipt of appropriate revenues due to it from any other
         entity. LSP agrees that SWBT will not be liable to it for damages
         (including, but not limited to, lost profits and exemplary damages)
         which may be owed to it as a result of any inaccurate or insufficient
         information resulting from any entity's actions, omissions, mistakes,
         or negligence and upon which SWBT may have relied in preparing
         settlement reports or performing any other act under this Attachment.

         LSP agrees to indemnify and hold SWBT harmless against and with respect
         to any and all third party claims, demands, liabilities or court
         actions arising from any of its actions, omissions, mistakes or
         negligence occurring during the course of SWBT's performance of CH
         processing pursuant to this Attachment.

         SWBT will not be liable for any losses or damages arising out of
         errors, interruptions, defects, failures, or malfunction of the CH
         services provided pursuant to this Attachment, including those arising
         from associated equipment and data processing systems, except such
         losses or damages caused by the sole negligence of SWBT. Any losses or
         damage for which SWBT is held liable under this Attachment will in no
         event exceed the amount of processing charges incurred by LSP for the
         CH services provided hereunder during the period beginning at the time
         SWBT receives notice of the error, interruption, defect, failure or
         malfunction, to the time service is restored.

9.       DISCLAIMER OF WARRANTIES

         SWBT MAKES NO REPRESENTATIONS OR WARRANTIES, EXPRESS OR IMPLIED,
         INCLUDING BUT NOT LIMITED TO ANY WARRANTY AS TO MERCHANTABILITY OR
         FITNESS FOR INTENDED OR PARTICULAR PURPOSE WITH RESPECT TO SERVICES
         PROVIDED HEREUNDER. ADDITIONALLY, SWBT ASSUMES NO RESPONSIBILITY WITH
         REGARD TO THE CORRECTNESS OF THE DATA SUPPLIED BY LSP WHEN THIS DATA IS
         ACCESSED AND USED BY A THIRD PARTY.



<PAGE>   66


                                                                 APPENDIX CNAM
                                                                 Page 2 of 12

                                  APPENDIX CNAM

This appendix contains the terms and conditions under which SWBT and LSP shall
provide CNAM Service Query service (or equivalent service):

1.       Definitions

         A. A-links mean a diverse pair of facilities connecting local end
office switching centers with Signaling Transfer Points.

         B. Calling Name Delivery (CNAM) service enables the terminating end
user to identify the calling party by a displayed name before the call is
answered. The calling party's name, date and time of the call are retrieved from
an SCP database and delivered to the end user's premise between the first and
second ring for display on compatible customer premise equipment (CPE).

         C. CNAM Service Query is SWBT's service that allows LSP to query SWBT's
Calling Name database for Calling Name information in order to deliver that
information to LSP's local subscribers.

         D. Calling Name database means a Party's database containing current
Calling Name information of all working lines served or administered by that
Party, including the Calling Name information of any telecommunications company
participating in that Party's Calling Name database.

         E. Calling Name information means telecommunications companies' records
of all their subscribers' names associated with one or more assigned ten-digit
telephone numbers.

         F. Service Control Point (SCP) is a CCS network node where the Calling
Name database resides.

         G. Service Point (SP) means a CCS network interface element capable of
initiating and/or terminating SS7 messages from an end office.

         H. Service Switching Point (SSP) means the software capability within a
switching point that provides the SP with SS7 message preparation/interpretation
capability plus SS7 transmission/reception access ability.

         I. Signaling Transfer Point (STP) is the point where a Party
interconnects with a CCS/SS7 network. In order to connect to SWBT's SS7 network,
LSP or a third




<PAGE>   67


                                                                 APPENDIX CNAM
                                                                 Page 3 of 12


party initiating LSP's Calling Name Queries must connect with an SWBT STP in
order to connect to SWBT's SCP.

         J. Common Channel Signaling (CCS) Network is an out-of-band,
packet-switched, signaling network used to transport supervision signals,
control signals, and data messages. CNAM Queries and Response messages are
transported across the CCS network.

         K. Signaling System 7 (SS7) is the signaling protocol used by the CCS
network.

         L. CNAM Service Query Rate applies to each CNAM Query received at the
SCP where a Party's Calling Name database resides.

         M. Query Transport Rate applies to each CNAM Query transported through
a Party's interconnecting STP and between the STP and the Calling Name database.
SWBT and LSP shall list their STP locations in the National Exchange Carrier
Association, Inc. Tariff FCC No. 4.

         N. Query means a message in American National Standards Institute's
(ANSI) standard SS7 signaling protocol which represents a request to a Calling
Name database for Calling Name information.

         O. Response means an SS7 message which when appropriately interpreted
represents an answer to a Query.

         P. Name Record Administering Companies means telecommunications
companies that administer telephone number assignments to the public and which
make their Calling Name information available in a Party's Calling Name
database.

2.       Description of Service

         A. SWBT shall provide LSP Calling Name information whenever LSP
initiates a Query from an SSP for such information associated with a call
terminating to a CNAM subscriber.

         B. All Queries to SWBT's Calling Name database shall use a translation
type of 005 and a subsystem number in the calling party field mutually agreed
upon by the Parties. LSP acknowledges that such subsystem number and translation
type values are necessary for SWBT to properly process Queries to its Calling
Name database.

         C. LSP warrants to SWBT that it shall send Queries conforming to the
ANSI approved standards for SS7 protocol and pursuant to the specification
standards documents identified in Exhibit A. Both Parties acknowledge that
transmission in said



<PAGE>   68

                                                                 APPENDIX CNAM
                                                                 Page 4 of 12



protocol is necessary for each party to provision CNAM Service Query. (Or the
equivalent thereof). Both Parties warrant that they shall send SS7 Messages that
comply with ANSI approved standards for SS7 protocol and pursuant to the
specification standards documents identified in Exhibit A. Each party reserves
the right to modify its network pursuant to other specifications standards,
which may include Bellcore specifications defining specific service
applications, message types and formats, that may become necessary to meet the
prevailing demands within the U.S. telecommunications industry. All such changes
shall be announced a minimum of 180 days in advance of implementation through
industry standard procedures. Each party will work cooperatively to coordinate
any necessary changes.

         D. LSP acknowledges and agrees that CCS/SS7 network overload due to
extraordinary volumes of Queries and/or other SS7 network messages can and will
have a detrimental effect on the performance of SWBT's CCS/SS7 network. LSP
further agrees that SWBT, in its sole discretion, shall employ certain automatic
and/or manual overload controls within its CCS/SS7 network to guard against
these detrimental effects. SWBT shall report to LSP any instances where overload
controls are invoked due to LSP's CCS/SS7 network and LSP agrees in such cases
to take immediate corrective actions as are necessary to cure the conditions
causing the overload situation.

         E. Prior to initiating service under this Agreement, LSP shall provide
to SWBT an initial forecast of busy hour Query volumes. If, prior to the
establishment of a mutually agreeable service effective date, in writing, SWBT,
at its discretion, determines that it lacks adequate storage or processing
capability to provide CNAM Service Query to LSP, SWBT shall notify LSP of its
intent not to provide the services under this Appendix and this Appendix will be
void and have no further effect.

         F. Upon request, LSP shall update its busy hour forecast for each
upcoming calendar year (January - December) by October 1 of the preceding year.
LSP shall provide such updates each year for the first three (3) years of this
Agreement.

         G. SWBT provides CNAM Service Query as set forth in this Appendix only
as such service is used for LSP's activities as a local service provider in
SWBT's traditional serving areas in the states of Arkansas, Kansas, Missouri,
Oklahoma, and Texas. SWBT provides CNAM Service Query for interexchange
carriers, operator service providers, and other telecommunications companies
under separate contract rates. LSP agrees that any use of SWBT's LIDB for the
provision of CNAM Service Query by LSP, including, but not limited to, when LSP
acts as an LSP outside of SWBT's traditional serving areas in the states of
Arkansas, Kansas, Missouri, Oklahoma, and Texas, and/or acts as an operator
service provider to other LSPs, local exchange companies, or any other
telecommunications company, and/or acts as an interexchange carrier, will be
pursuant to the standard terms, conditions, rates and charges of SWBT's non-LSP
contracts, as revised, for CNAM Service Query.




<PAGE>   69


                                                                 APPENDIX CNAM
                                                                 Page 5 of 12

3.       Price and Payment

         A. LSP shall pay a CNAM Service Query Rate of $0.0115 and a Query
Transport Rate of $0.0045 for each Query initiated into SWBT's Calling Name
database. Additional nonrecurring charges for point code activation of $15.35
and service order activity of $256.70 shall be applicable for all such activity
after the initial service order and initial point code activation. The per CNAM
Service Query rate SWBT charges hereunder may be increased upon sixty (60) days
written notice to the LSP unless LSP acts as an agent on behalf of other
carriers in which case ninety (90) days written notice shall be given. Upon such
notice, the Party receiving notice may terminate this Appendix without any
termination liability as provided in Section 5(B) of this Appendix. All tariffed
rates associated with Services provided hereunder are subject to change pursuant
to revisions of such tariffs.

         B. SWBT shall record usage information for LSP's CNAM Queries
terminating to SWBT's Calling Name database. SWBT shall use its SCPs as the
source of usage data. SWBT shall aggregate usage by the point code of the
Query-originating SSP.

         C. Based upon the data identified in Subsection 3.B above, SWBT shall
bill the LSP for its CNAM Queries on a monthly basis. The bill will be issued by
the fifteenth day of each month, and LSP shall pay the Subsection 3.B bill
within thirty (30) days of the bill issue date.

         D. Depending on LSP's choice of method for transporting its Queries and
responses, LSP may be required to purchase certain other services, especially
services that may be provided pursuant to effective tariffs. In this event the
prices, terms, conditions and billing for such services will be specified in the
applicable tariff(s), and this Appendix shall not be construed to circumvent the
prices, terms, conditions, or billing as specified in the applicable tariff(s).

         E. If there is a dispute associated with a monthly bill, the disputing
Party shall notify the other in writing within ninety (90) calendar days of the
date of said monthly bill or the dispute shall be waived. Each party agrees that
any amount of any monthly bill that the Party disputes will be paid by that
Party according to the terms of Subsection 3.C above. Any adjustments relating
to a disputed amount shall be reflected on the next monthly bill issued after
resolution. Any credit issued upon resolution of any dispute shall bear interest
at the rate specified in Subsection 3.C. above, payable on and as of the date
the credit is issued. Parties shall work cooperatively and use their best
efforts to resolve any disputes as quickly as possible.

         F. If LSP acts as a telecommunications company other than a local
service provider, or if LSP acts as a local service provider in areas outside of
SWBT's traditional service areas in the states of Arkansas, Kansas, Missouri,
Oklahoma, and



<PAGE>   70

                                                                 APPENDIX CNAM
                                                                 Page 6 of 12

Texas, LSP will designate those point codes from which it originates CNAM
Service Queries as an LSP acting as a local service provider within SWBT's
traditional service areas in the states of Arkansas, Kansas, Missouri, Oklahoma
and Texas from those point codes which originate CNAM Service Queries for all
other aspects of its business. If LSP uses the same OPC to originate Queries for
its operations as an LSP within SWBT's traditional service areas in the states
of Arkansas, Kansas, Missouri, Oklahoma, and Texas as it does for any other
aspect of its business, then LSP will provide SWBT with a percentage of use
factor that SWBT can use to apportion LSP's traffic between SWBT's terms and
conditions, rates and charges under this Appendix and the standard terms,
conditions, rates and charges under SWBT's non-LSP contracts. LSP will provide
this factor in a whole number between one (1) and one hundred (100) to indicate
the percentage of CNAM Service Queries LSP originates as an LSP acting as a
local service provider within SWBT's traditional service area in the states of
Arkansas, Kansas, Missouri, Oklahoma, and Texas. A percentage of use factor of 1
(one) indicates that one percent of LSP's CNAM Service Queries originate as an
LSP acting as a local service provider within SWBT's traditional service areas
in the states of Arkansas, Kansas, Missouri, Oklahoma, and Texas. A percentage
of use factor of 100 indicates that one hundred percent of LSP's traffic is from
LSP acting as a local service provider within SWBT's traditional service areas
in the states of Arkansas, Kansas, Missouri, Oklahoma, and Texas.

         G. Such percentage of use factors will be provided by LSP on the LIDB
Access Service Order Form used to establish the service. All updates to this
factor will be provided via a letter. If LSP does not furnish a percentage of
usage factor, LSP agrees that SWBT will apply a percentage of use factor of one
percent (1%).

         H. LSP agrees to update its percentage of use factors on a quarterly
basis. Effective on the first of January, April, July and October of each year,
LSP will forward to SWBT, to be received no later than fifteen (15) business
days after the first of each such month, a revised report showing the percentage
of use factors for the past three months ending the last day of December, March,
June, and September, respectively, for each OPC from which LSP originates CNAM
Service Query. Both parties agree that the revised report will serve as the
basis for the next three months billing. Both parties agree that no prorating or
backbilling will be done based on the report. SWBT will use the revised report
to apportion usage rate, monthly rates, and nonrecurring charges until a revised
report is received from LSP as set forth and agreed to herein.

         I. Both parties agree that SWBT may, upon written request by Certified
U.S. mail (return receipt requested), require LSP to provide call detail records
which will be audited to substantiate the projected percentage of use factor
provided by LSP. SWBT may request this detailed information annually. If the
audit results represent what SWBT considers to be a substantial deviation from
LSP's previously reported percentage of use for the period upon which the audit
is based, and that deviation is not



<PAGE>   71

                                                                 APPENDIX CNAM
                                                                 Page 7 of 12



due to seasonal changes or other identifiable reasons, LSP agrees to allow SWBT
to request such call detail records more than once annually. Both parties agree
that SWBT may make the call detail records available to an independent auditor
or to SWBT audit employees within thirty (30) days of the request at an agreed
upon location during normal business hours.

         J. Both parties agree that if LSP fails to comply with SWBT's request
for auditable call detail records, SWBT may refuse additional applications for
service and/or refuse to complete any pending orders for service for a period of
thirty (30) days. If at the conclusion of thirty (30) days, LSP still does not
comply with this request, both parties agree that SWBT may apply an assumed
percentage of use factor of one percent (1%).

4.       Ownership of the Calling Name Information

         A. Telecommunications companies depositing information in a Party's
Calling Name database retain full and complete ownership and control over such
Calling Names information in that Calling Name database. The querying Party
obtains no ownership interest by virtue of this Appendix.

         B. LSP shall not copy, store, maintain or create any table or database
of any kind after initiation of, and based upon a response to, a CNAM Query to
SWBT's calling name database.

         C. If LSP acts on behalf of other carriers, LSP shall prohibit its
Query-originating carrier customers from copying, storing, maintaining, or
creating any table or database of any kind from any Response provided by SWBT
after a CNAM Query to a Calling Name database.

5. Term and Termination

         A. This Appendix shall become effective pursuant to Section XXVII
(Effective Date) of the Agreement and shall continue for two (2) years from the
date of implementation of CNAM Service Query (or the equivalent thereof).
Thereafter, this Appendix shall remain in effect unless terminated by either
party upon written notice given sixty (60) days in advance of the termination
date.

         B. Should LSP terminate this Appendix within the first six (6) months
of this effective date, LSP agrees to pay SWBT an early termination sum equal to
two (2) times the average monthly volume of LSP's CNAM Queries times the rate
specified in Section 3(A) of this Appendix. The average monthly volume will be
calculated using the previous two (2) months' volume divided by two (2) or, if
less than two months, the monthly volume of the first month service was
provided.




<PAGE>   72
                                                                 APPENDIX CNAM
                                                                 Page 8 of 12



         C. If at any time during the term of this Appendix a tariff for CNAM
Service Query (or the equivalent service thereof) becomes effective, the tariff
and all terms and conditions, including all rates, will supersede this Appendix.
Under these circumstances, no termination liability as provided in Section 5(B)
of this Appendix will apply.

         D. If a party materially fails to perform its obligation under this
appendix, the other party, after notifying the non-performing party of the
failure to perform and allowing that party thirty (30) days after receipt of the
notice to cure such failure, may cancel this appendix immediately upon written
notice.

         E. Notwithstanding anything to the contrary in this Appendix, if legal
or regulatory decisions or rules compel SWBT or LSP to terminate the Appendix,
SWBT and LSP shall have no liability to the other in connection with such
termination.

6.       Limitation of Liability

         A. LSP's sole and exclusive remedies against SWBT for injury, loss or
damage caused by or arising from anything said, omitted or done in connection
with this Appendix regardless of the form of action, whether in contract or in
tort (including negligence or strict liability) shall be the amount of actual
direct damages and in no event shall exceed the amount paid for CNAM Service
Queries.

         B. The remedies in Section 6(A) of this Appendix shall be exclusive of
all other remedies against a Party, its affiliate, subsidiaries or parent
corporation, (including their directors, officers, employees or agents).

         C. In no event shall SWBT have any liability for system outages or
inaccessibility, or for losses arising from the unauthorized use of the data by
CNAM Service Query purchasers.

         D. CALLING NAME INFORMATION PROVIDED TO AN LSP HEREUNDER SHALL BE
PROVIDED "AS IS." SWBT MAKES NO WARRANTY, EXPRESS OR IMPLIED, REGARDING THE
ACCURACY OR COMPLETENESS OF THE CALLING NAME INFORMATION REGARDLESS OF WHOSE
CALLING NAME INFORMATION IS PROVIDED. AND, SWBT SHALL NOT BE HELD LIABLE FOR ANY
ACTIONS OR OMISSIONS ARISING OUT OF OR IN CONJUNCTION WITH LSP'S USE OF THE
CALLING NAME INFORMATION. NOTWITHSTANDING THE FOREGOING, SWBT WARRANTS THAT LSP
WILL BE ACCESSING THE SAME CALLING NAME DATABASE FOR CUSTOMER'S CNAM QUERIES AS
SWBT ACCESSES FOR ITS OWN QUERIES.

         E. SWBT is furnishing access to its Calling Name database in order to
facilitate the LSP's provision of Calling Name Delivery Service (CNDS) to its
end




<PAGE>   73
                                                                 APPENDIX CNAM
                                                                 Page 9 of 12

users or to the end users of its Query-originating carrier customers, but not to
insure against the risk of completion of a call to a CNDS subscriber without the
display of the name of the caller. While each Party agrees to make every
reasonable attempt to provide accurate and current Calling Name information, the
Parties acknowledge that Calling Name information is the product of routine
business service order activity. LSP acknowledges that SWBT can furnish Calling
Name information only as accurate and current as the information has been
provided to SWBT for inclusion in its CNAM database. Therefore, SWBT, in
addition to the limitations of liability set forth, is not liable for
inaccuracies in the Calling Name information name records provided to LSP or to
its Query-originating carrier customers, except such inaccuracies caused by
SWBT's willful or wanton misconduct or gross negligence.

         The Parties acknowledge that each Calling Name database limits the
Calling Name information length to fifteen (15) characters. As a result, the
Calling Name Information provided in a response to a Query may not reflect a
subscriber's full name. Name records of residential local telephone subscribers
will generally be stored in the form of last name followed by first name
(separated by a comma or space) to a maximum of fifteen (15) characters. Name
records of business local telephone subscribers will generally be stored in the
form of the first fifteen (15) characters of the listed business name that in
some cases may include abbreviations. The Parties also acknowledge that certain
local telephone service subscribers of Name Record Administering Companies may
require their name information to be restricted, altered, or rendered
unavailable. Therefore, in addition to the limitations of liability set forth in
Section 6 of this Appendix, SWBT is not liable for any and all liability,
claims, damages or actions including attorney's fees, resulting directly or
indirectly from the content of any Name Record contained in a Calling Name
database and provided to LSP or its Query-originating carrier customers, except
for such content related claims, damages or actions resulting from SWBT's
willful or wanton misconduct or gross negligence.

         F. The Parties acknowledge that certain federal and/or state
regulations require that local exchange telephone companies make available to
their subscribers the ability to block the delivery of their telephone number
and/or name information to the terminating telephone when the subscriber
originates a telephone call. This blocking can either be on a call-by-call basis
or on an every call basis. Similarly, a party utilizing blocking services can
unblock on a call-by-call basis or every call basis. LSP acknowledges its
responsibility to and warrant that it will abide by information received in SS7
protocol during call set-up that the calling telephone service subscriber wishes
to block or unblock the delivery of telephone number and/or name information to
a CNDS subscriber. LSP agrees not to attempt to obtain the caller's name
information by originating a Query to SWBT's Calling Name database where the
subscriber attempted to block such information, nor will LSP block information a
subscriber attempted to unblock. Therefore, SWBT, in addition to the limitations
of liability set forth in this Section, is not liable for any failure by LSP or
its Query-originating carrier customers



<PAGE>   74
                                                                 APPENDIX CNAM
                                                                 Page 10 of 12




to abide by the caller's desire to block or unblock delivery of Calling Name
information, and LSP agrees to hold SWBT harmless from, and defend and indemnify
SWBT for, any and all liability, claims, damages or actions including attorney's
fees, resulting directly or indirectly from LSP or its Query-originating carrier
customers' failure to block or unblock delivery of the Calling Name information
when appropriate indication is provided, except for such privacy related claims,
damages or actions caused by SWBT's willful or wanton misconduct or gross
negligence.

         G. In no event shall SWBT, its affiliates, subsidiaries or parent
corporation (including its directors, officers, employees or agents) have any
liability whatsoever to or through LSP for any indirect, special, or
consequential damages, including, but not limited to loss of anticipated profits
or revenue or other economic loss in connection with or arising from anything
said, omitted or done hereunder, even if SWBT has been advised of the
possibility of such damages.

7.       Communication and Notices

         A. Ordering and billing inquiries for the services described herein
from SWBT shall be directed to the Local Service Provider Service Center
(LSPSC). Ordering shall be done through the LSPSC using the form attached hereto
as Exhibit B.

8.       Confidentiality

         A. Identification. SWBT and LSP recognize and acknowledge that, in
connection with the services to be provided hereunder, it may disclose to the
other party proprietary or confidential customer, technical or business
information in written, graphic, oral or other tangible or intangible forms. In
order for such information to be considered "Proprietary Information" under this
Appendix, it must be marked "Confidential" or "Proprietary" or bear a marking of
similar import. Orally discussed information shall be considered Proprietary
Information only if contemporaneously identified as such and reduced to writing
and delivered to the other party with a statement or marking of confidentiality
within twenty (20) calendar days after oral disclosure.

         B. Nondisclosure. Subject to Sections 8C through 8F, the Party (the
"Receiving Party") that receives Proprietary Information from the other Party
(the "Disclosing Party") agrees:

            (1) That all Proprietary Information shall be and shall remain the
exclusive property of the Disclosing Party.

            (2) To limit access to such Proprietary Information to authorized
employees and other individuals who have a need to know the Proprietary
Information in order to perform its obligation under this Appendix.



<PAGE>   75
                                                                 APPENDIX CNAM
                                                                 Page 11 of 12




            (3) To keep such Proprietary Information confidential and to use the
same level of care to prevent disclosure or unauthorized use of the received
Proprietary Information as it exercises in protecting its own Proprietary
Information of a similar nature.

            (4) For a period of three (3) years following any disclosure, not to
copy or publish or disclose such Proprietary Information to others or authorize
anyone else to copy or publish or disclose such Proprietary Information to
others without the prior written approval of the Disclosing Party.

            (5) To use such Proprietary Information only for purposes of
performing its obligations under this Appendix and for other purposes only upon
such terms as may be agreed upon between the Parties in writing.

         C. Required Disclosures. The Receiving Party agrees to give notice to
the Disclosing Party of any demand to disclose or provide Proprietary
Information of the Disclosing Party to another person, under lawful process,
prior to disclosing or furnishing such Proprietary Information. Further, the
Receiving Party agrees to reasonably cooperate if the Disclosing Party deems it
necessary to seek protective arrangements. The Receiving Party may disclose or
provide Proprietary Information of the Disclosing Party to meet the requirements
of a court, regulatory body or government agency having jurisdiction over the
Party; provided, however, that the Receiving Party shall notify the Disclosing
Party so as to give the Disclosing Party a reasonable opportunity to object to
such disclosure. The Disclosing Party may not unreasonably withhold approval of
protective arrangements provided by any such court, regulatory body or
government agency. Nothing herein requires either Party to support the position
of any person or entity as to whether any particular Proprietary Information is
proprietary under applicable law or this Section 8.

         D. Exceptions. Notwithstanding anything to the contrary contained in
this Appendix, the Proprietary Information described herein shall not be deemed
confidential or proprietary and the Receiving Party shall have no obligation to
prevent disclosure of such Proprietary Information if such Proprietary
Information:

                  (1) is already known to the Receiving Party;

                  (2) is or becomes publicly known, through publication,
inspection of the product, or otherwise, and through no wrongful act of the
Receiving Party;

                  (3) is received from a third party without similar restriction
and without breach of this Section 8;

                  (4) is independently developed, produced or generated by the
Receiving Party;

                  (5) is furnished to a third party by the Disclosing Party
without a similar restriction on the third party's rights; or



<PAGE>   76
                                                                 APPENDIX CNAM
                                                                 Page 12 of 12




                  (6) is approved for release by written authorization of the
Disclosing Party, but only to the extent of such authorization.

         E.       Permitted Uses. SWBT shall be permitted to use Proprietary
Information obtained through recording the volume of Customer Queries for the
purposes of: (a) estimation of facilities usage for jurisdictional separations;
(b) engineering and network planning of facilities; and (c) measurement for
billing purposes.

         F. Legal Requirements. Notwithstanding anything to the contrary
contained in this Agreement, a Party's ability to disclose Proprietary
Information or use disclosed Proprietary Information is subject to all
applicable statutes, decisions and regulatory rules concerning the disclosure
and use of such Proprietary Information which, by their express terms, mandate a
different handling of such information.

9.       Mutuality

To the extent that LSP stores its own Calling Name information in a database,
LSP agrees that such Calling Name information shall be available to SWBT on
terms and conditions comparable to those contained in this Appendix. Such terms
and conditions shall include but not be limited to, making such Calling Name
information available on a platform technically similar to that employed by
SWBT, and at a rate comparable to that charged by SWBT.

10. Attached and incorporated herein are:

Exhibit A                  - Specifications and Standards
Exhibit B                  - LIDB Access Service Order Form [to be attached].




<PAGE>   77


                                                                    Exhibit A
                                                                    PAGE 1 OF 1

                          Specifications and Standards

Descriptions of Subject Area
and Issuing Organization                                     Document Number
- ----------------------------                                 ---------------
A.  Bellcore, SS7 Specifications                             TR-NPL-000246

B.  ANSI, SS7 Specifications
    - Message Transfer part                                  T1.111
    - Signaling Connection Control                           Tl.112
             Part

    - Transaction Capabilities                               T1.114
             Application Part

C.  Bellcore, CLASS Calling Name Delivery                    TR-NWT-001188
             Generic Requirements

D.  Bellcore, CCS Network Interface                          TR-TSV-000905
             Specifications



<PAGE>   78


                                                                APPENDIX DCO
                                                                 PAGE 2 OF 2


                                  APPENDIX DCO

EXCHANGE:

- --------------------------------------------------------------------------------
  DIRECTION(1)  LSP LOCATION(2)   DCO(3)           NIP(4)        INTERCONNECTION
                                         [INSERT ADDRESS AND V&H       METHOD
                                                  BELOW]
- --------------------------------------------------------------------------------

- --------------------------------------------------------------------------------

- --------------------------------------------------------------------------------

- --------------------------------------------------------------------------------

- --------------------------------------------------------------------------------

- --------------------------------------------------------------------------------
















- ------------------------------
(1) This column will be completed by indicating the direction of the terminating
traffic (e.g., either LSP to SWBT or SWBT to LSP.)

(2) LSP LOCATION - The address of the LSP Location that will house LSP's
interconnection equipment and through which SWBT will terminate traffic on the
LSP's network.

(3) DESIGNATED CONNECTING OFFICE (DCO) - The address of the SWBT end office or
tandem through which the LSP will terminate traffic on SWBT's network.

(4) NETWORK INTERCONNECTION POINT or "NIP" - The NIP is the location where SWBT
and LSP facilities connect. The NIP will be identified by address and V&H
Coordinates. The NIP for traffic going from LSP to SWBT and going from SWBT to
LSP could be different. Where the physical interface occurs at a SWBT end office
or tandem, the NIP shall be located at the DCO. When SWBT and an LSP agree to
interconnect with a Mid-Span Fiber Interconnection (MSFI) the NIP is the
location where the fiber of SWBT and the fiber of the LSP is connected, unless
both Parties agree that the NIP is defined otherwise. Where the physical
interface occurs at the LSP location the NIP for that interconnection shall be
located at the LSP location.



<PAGE>   79
                                                                    APPENDIX DA
                                                                    PAGE 2 OF 5



                                   APPENDIX DA

                          DIRECTORY ASSISTANCE SERVICE

This Appendix sets forth the terms and conditions under which Southwestern Bell
Telephone Company ("SWBT") agrees to provide Directory Assistance Services (DA
Services) for LSP ("LSP").

I.       SERVICES

         SWBT will provide the following DA Services:

         A.       DIRECTORY ASSISTANCE (DA) - consists of providing subscriber
                  listing information (name, address, and published telephone
                  number or an indication of "non-published status") to LSP's
                  end users who dial 411 or NPA+555+1212 and whenever
                  appropriate, performing Non-Published and Non-List service
                  according to current SWBT methods and practices.

         B.       DIRECTORY ASSISTANCE CALL COMPLETION (DACC) - an optional
                  service in which SWBT completes a call to the requested number
                  on behalf of LSP's end user, utilizing an automated voice
                  system or with operator assistance. SWBT agrees to provide DA
                  with DACC upon request.

II.      DEFINITIONS

         The following terms are defined as set forth below:

         A.       Non-List Telephone Number - A telephone number that, at the
                  request of the telephone subscriber, is not published in a
                  telephone directory, but is available by calling a SWBT DA
                  operator.

         B.       Non-Published Number - A telephone number that, at the request
                  of the telephone subscriber, is neither published in a
                  telephone directory nor provided by a SWBT DA operator.

         C.       Published Number - A telephone number that is published in a
                  telephone directory and is available upon request by calling a
                  SWBT DA operator.

         D.       Call Branding - the procedure of identifying a providers name
                  audibly and distinctly to the consumer at the beginning of
                  each DA Services call, and prior to completion of a DACC
                  request.



<PAGE>   80
                                                                    APPENDIX DA
                                                                    PAGE 3 OF 5


III.     CALL BRANDING AND RATE REFERENCE REQUIREMENTS

         A.       REQUIREMENTS - Where SWBT provides LSPs OS and DA services via
                  the same trunk, both the OS and DA calls will be branded with
                  the same brand. Where SWBT is only providing DA service on
                  behalf of the LSP, specific DA branding can be provided upon
                  request. Such branding will be provided pursuant paragraph B.
                  below.

         B.       CALL BRANDING - SWBT will brand DA in LSP's name based upon
                  the criteria outlined below:

                  1.       LSP will provide SWBT with written specification of
                           its company name to be used in creating LSP specific
                           branding messages for its DA calls.

                  2.       An initial non-recurring charge applies per TOPS
                           switch, per load for the establishment of Call
                           Branding as well as a charge per TOPS switch, per
                           subsequent load to change the brand. In addition, a
                           per call charge applies for every DA call handled by
                           SWBT on behalf of LSP when such services are provided
                           in conjunction with: i) the purchase of SWBT's
                           unbundled local switching; or ii) when multiple
                           brands are required on a single Operator Services
                           trunk. Prices for Call Branding are as outlined in
                           Exhibit II, attached hereto and incorporated herein.

         C.       DIRECTORY ASSISTANCE (DA) RATE/REFERENCE INFORMATION - SWBT
                  will provide LSP DA Rate/Reference Information based upon the
                  criteria outlined below:

                  1.       LSP will furnish DA Rate and Reference Information in
                           a mutually agreed to format or media thirty (30) days
                           in advance of the date when the DA Services are to be
                           undertaken.

                  2.       LSP will inform SWBT, in writing, of any changes to
                           be made to such Rate/Reference Information ten (10)
                           working days prior to the effective Rate/Reference
                           change date. LSP acknowledges that it is responsible
                           to provide SWBT updated Rate/Reference Information in
                           advance of when the Rates/Reference Information are
                           to become effective.

                  3.       In all cases when a SWBT Operator receives a rate
                           request from a LSP end user, SWBT will quote the
                           applicable DA rates as provided by LSP.

An initial non-recurring charge will apply per TOPS switch for loading of LSP's
Operator Services Rate/Reference Information as well as a charge per TOPS switch
for each subsequent change to either the LSP's DA Services Rate or Reference
Information.




<PAGE>   81
                                                                    APPENDIX DA
                                                                    PAGE 4 OF 5



IV.      RESPONSIBILITIES OF THE PARTIES

         A.       SWBT will be the sole provider of DA Services for LSP's local
                  serving area(s) listed in Exhibit I, which is attached to this
                  Appendix, beginning on the service effective date also shown
                  in Exhibit I.

         B.       LSP will be responsible for providing the equipment and
                  facilities necessary for signaling and routing calls with
                  Automatic Number Identification (ANI) to each SWBT operator
                  switch. Should LSP seek to provide interexchange DA Service
                  under this agreement it is responsible for ordering the
                  necessary facilities. Nothing in this agreement in any way
                  changes the manner in which an interexchange Carrier obtains
                  access service for the purpose of originating or terminating
                  interexchange traffic.

         C.       Facilities necessary for the provision of DA Services shall be
                  provided by the parties hereto, using standard trunk traffic
                  engineering procedures to insure that the objective grade of
                  service is met. Each party shall bear the costs for its own
                  facilities. LSP shall bear the costs of facilities necessary
                  for signaling and routing calls with Automatic Number
                  Identification (ANI) to each SWBT operator switch. SWBT shall
                  bear the cost of facilities and equipment necessary to provide
                  DA Services.

         D.       LSP will furnish in writing to SWBT, thirty (30) days in
                  advance of the date when the DA Services are to be undertaken,
                  all end user listing records and information required by SWBT
                  to provide the DA Services.

         E.       LSP will keep end user listing records current using reporting
                  forms and procedures that are mutually acceptable to both
                  parties, and will inform SWBT, in writing, of any changes to
                  be made to such records. LSP will send the DA listing records
                  to SWBT via a local manual service order, T-TRAN, magnetic
                  tape or by any other mutually agreed to format or media.

         F.       SWBT will accumulate and provide LSP such data as necessary
                  for LSP to verify traffic volumes and bill its end users.

V.       METHODS AND PRACTICES

         SWBT will provide the DA Services to LSP's end users in accordance with
         SWBT's DA methods and practices that are in effect at the time the DA
         call is made, unless otherwise agreed in writing by both parties.

VI.      PRICING

         Pricing for DA Services shall be based on the rates specified in
         Exhibit II, PRICING, which is attached hereto and made part of this
         Appendix. The prices will apply from the



<PAGE>   82
                                                                    APPENDIX DA
                                                                    PAGE 5 OF 5




         service effective date through the term of this agreement as specified
         in paragraph X., A. below. Beyond the specified term of this Appendix,
         SWBT may change the prices for the provision of DA Services upon one
         hundred-twenty (120) days' notice to LSP.

VII.     MONTHLY BILLING

         SWBT will render monthly billing statements to LSP, and remittance in
         full will be due within thirty (30) days of receipt.

VIII.    LIABILITY

         A.       In addition to the liability provisions contained in the
                  Agreement, LSP agrees to defend, indemnify, and hold harmless
                  SWBT from any and all losses, damages, or other liability
                  including attorneys fees that LSP may incur as a result of
                  claims, demands, wrongful death actions, or other suits
                  brought by any party that arise out of LSP's end users use of
                  DA Services. LSP shall defend against all end user claims just
                  as if LSP had provided such service to its end user with the
                  LSP's own operators and shall assert its tariff limitation of
                  liability for benefit of both SWBT and LSP.

         B.       LSP also agrees to release, defend, indemnify, and hold
                  harmless SWBT from any claim, demand or suit that asserts any
                  infringement or invasion of privacy or confidentiality of any
                  person or persons caused or claimed to be caused, directly, or
                  indirectly, by SWBT employees and equipment associated with
                  provision of the DA Services. This provision includes but is
                  not limited to suits arising from disclosure of the telephone
                  number, address, or name associated with the telephone called
                  or the telephone used to call the DA Services.

IX.      TERMS OF APPENDIX

         A.       Unless sooner terminated, this Appendix will continue in force
                  for a period of one (1) year from the effective date of this
                  agreement and thereafter until terminated by one
                  hundred-twenty (120) days notice in writing from either Party
                  to the other.

         B.       If LSP terminates this agreement prior to the agreed-upon term
                  of this Appendix, LSP shall pay SWBT, within thirty (30) days
                  of the issuance of a final bill by SWBT, all amounts due for
                  actual services provided under this Appendix, plus estimated
                  monthly charges for the remainder of the term. Estimated
                  charges will be based on an average of the actual monthly
                  amounts billed by SWBT pursuant to this Appendix prior to its
                  termination.

         C.       The rates applicable for determining the amount(s) under the
                  terms outlined in this Section are those specified in Exhibit
                  II.



<PAGE>   83


                                                      APPENDIX DA - EXHIBIT I
                                                                  PAGE 1 of 1

                                   APPENDIX DA
                   DIRECTORY ASSISTANCE SERVICES EXCHANGE LIST

                           EFFECTIVE:_________________
                                         (mm/dd/yr)

The following table depicts the services and exchanges covered by this Appendix:



- --------------------------------------------------------------------------------
SWBT SERVING        LSP'S
 OFFICE(S)        OFFICE(S)     TOLL (555)      LOCAL (411)       DACC
- --------------------------------------------------------------------------------

- --------------------------------------------------------------------------------

- --------------------------------------------------------------------------------

- --------------------------------------------------------------------------------

- --------------------------------------------------------------------------------

- --------------------------------------------------------------------------------

- --------------------------------------------------------------------------------

- --------------------------------------------------------------------------------










<PAGE>   84


                                                      APPENDIX DA - EXHIBIT II
                                                                   PAGE 1 OF 1

                                   APPENDIX DA
                                     KANSAS
                                   EXHIBIT II
                           PRICING - FACILITIES BASED

                           EFFECTIVE: _______________
                                        (mm/dd/yr)

The following rates will apply for each service element:

          ----------------------------------------------------------------------
          A.       DIRECTORY ASSISTANCE (DA)

          This usage rate applies to each DA call.

                                                   Rate per call         $0.433
          ----------------------------------------------------------------------

          B.       DIRECTORY ASSISTANCE CALL COMPLETION
                   DACC)

          This usage rate applies to each DA call that has been completed to the
          requested number.

                                         Rate per completed call          $0.24
          ----------------------------------------------------------------------

          C.       CALL BRANDING

          An initial non-recurring charge applies per TOPS switch, per brand for
          the establishment of Call Branding.

                                           Rate per initial load      $2,100.00
                                  Rate per load for Brand change      $2,100.00
                                                       Per Call(1)        $0.02
          ----------------------------------------------------------------------
          D.       DA SERVICES RATE/REFERENCE INFORMATION

          An initial non-recurring charge applies per TOPS switch for the
          initial load of Carrier's DA Services Rate/Reference Information. An
          additional non-recurring charge applies for each subsequent change to
          Rate/Reference Information.

                                          Rate per initial load       $3,250.00
                                Rate per subsequent rate change       $2,250.00
                           Rate per subsequent reference change       $2,250.00
                                                                               
          ----------------------------------------------------------------------




- ------------------------

(1) A per call charge will apply when DA services are provided in conjunction
with i) unbundled local switching or ii) when multiple brands are required on a
single trunk.

<PAGE>   85

                                                                  Appendix FGA
                                                                   Page 2 of 7



                                  APPENDIX FGA

This Appendix to Attachment Compensation sets forth the terms and conditions
under which the Parties will distribute revenue from the joint provision of
Feature Group A (FGA) Switched Access Services.

These services will be provided within a Local Access and Transport Area (LATA)
and/or an Extended Area Service (EAS) arrangement. The Primary Company will
compensate the Secondary Company only to the extent that it has not already been
compensated under its interstate or intrastate access service tariffs or other
settlement/contract arrangements. This Appendix is subject to applicable
tariffs.

1.0      DEFINITIONS

1.1      Local Access and Transport Area (LATA) means a pre-established
         geographic area encompassing one or more local exchange areas within
         which a Party may provide telecommunications services.

1.2      The term Extended Area Service (EAS) as used in this Appendix means the
         provision of message telephone exchange service between two or more
         local exchange service areas without a toll charge.

1.3      Subscriber Access Lines will mean a communication facility provided
         under a general and/or exchange service tariff extended from a customer
         premise to a central office switch which may be used to make and
         receive exchange service calls, intrastate toll service or interstate
         toll service calls.

1.4      Feature Group A Switched Access Service includes all facilities and
         services rendered in furnishing FGA access service, both in EAS and
         non-EAS (i.e., LATA wide terminations) areas, in accordance with the
         schedule or charges, regulations, terms and conditions stated in the
         interstate or intrastate access service tariffs of the Parties.

1.5      The Primary Company denotes the Party with the Primary office(s).

1.6      The Primary Office is an office which: (1) directly or jointly connects
         to an interexchange carrier and /or end user: and (2) provides joint
         FGA switched access service to that interexchange carrier and/or end
         user with other end offices.

1.7      The Secondary Company denotes the Party with the secondary office(s).




<PAGE>   86
                                                                  Appendix FGA
                                                                   Page 3 of 7




1.8      The Secondary Office is any office involved in providing joint FGA
         switched access to an Interexchange carrier and /or end user through
         the switching facilities of the Primary office.

1.9      Revenues under this Appendix are those FGA Switched Access amounts due
         the Primary and Secondary Companies under their applicable tariffs,
         less uncollectible revenues. Revenues for any other services are not
         included. Uncollectible revenues are those revenues the Primary Company
         is unable to collect, using its regular established collection
         procedures. The Primary Company may offset uncollectibles against
         current revenue distribution.

1.10     Access Minutes or Minutes of Use (MOUs) are those minutes of use as
         described in Part 69 of the Federal Communications Commission s Rules,
         and are limited to those FGA MOUs which originate and /or terminate in
         the Secondary Office(s) covered by this Appendix.

1.11     Currently Effective Tariff Rate means the approved tariff rate
         effective on the first day of the month for which compensation is being
         calculated.

2.0      UNDERTAKING OF THE PARTIES

2.1      The Secondary Company will notify the Primary Company of all tariff
         rate revisions, affecting this Appendix which the FCC or other
         appropriate regulatory authority allows to take effect, at least 30
         days in advance of their effective date. Revenue distribution will be
         based on the revised rates 45 days after the effective date of the
         tariff revisions. However, if the secondary Company fails to notify the
         Primary Company of a new rate within 30 days of its effective date, the
         Primary company may delay implementation of the new rate until the next
         month s revenue distribution cycle, and will not be required to adjust
         the previous bills retroactive.

2.2      Each party will furnish to the other such information as may reasonably
         be required for the administration, computation and distribution of
         revenue, or otherwise to execute the provisions of this appendix.

3.0      ADMINISTRATION OF REVENUE DISTRIBUTION

         The Primary Company will be responsible for the administration,
         computation and distribution of the FGA access service revenues
         collected on behalf of the Secondary Company.

4.0      MINUTES OF USE (MOUS) DEVELOPMENT

4.1      The Parties will calculate the amount of FGA revenues due each Party,
         by determining the amount of FGA MOUs attributable to each Party as
         described



<PAGE>   87

                                                                  Appendix FGA
                                                                   Page 4 of 7



         below. The Primary Company will then multiply the MOUs by the rates in
         the Secondary Company's applicable tariff to determine the amounts
         tentatively due to the Secondary Company.

4.2      TERMINATING MOUS DEVELOPMENT

4.2.1    Actual monthly premium (charged at equal access end office) and
         non-premium (charged at non-equal access end offices) terminating FGA
         access MOUs for each office in the LATA or a FGA access EAS area will
         be measured by the Primary Company.

4.2.2    Where the Primary Company cannot measure or identify the terminating
         FGA MOUs by end office, terminating MOUs will be total unmeasured MOUs
         allocated to the LATA. In this event, those MOUs will be distributed
         based upon the ratio of each Party s subscriber access lines, as
         identified in Exhibit B, which is attached hereto and made a part
         hereof, to the total subscriber access lines in the FGA access area as
         determined by the Primary Company.

4.3      ORIGINATING MOUS DEVELOPMENT

4.3.1    The Primary Company will derive and distribute monthly originating FGA
         access MOUs, billed by the Primary Company, to each Secondary Company s
         end office in the EAS calling area, as identified in Exhibit A, which
         is attached hereto and made a part hereof, based upon a ration of each
         Party s subscriber access lines to the total subscriber access lines in
         the appropriate EAS area as determined by the Primary Company.

4.3.2    The parties recognize that since originating non-EAS calls to the FGA
         service area are rated and billed as intraLATA toll, such usage is
         assumed to be minimal. Therefore, originating FGA access MOUs will not
         be distributed to end offices outside an EAS calling area.

5.0      CALCULATION OF REVENUE DISTRIBUTION

5.1      The amount of premium or non-premium revenues due each party each month
         will be equal to the sum of Originating and Terminating premium or
         non-premium revenue for each end office. These revenues will be
         calculated by the Primary Company by multiplying each of the Secondary
         Company s effective interstate and/or intrastate FGA switched access
         tariff rate elements (except the Local Transport element described
         below) by the appropriate MOU calculation under Sections 4.2.1 and
         4.2.2.

5.2      Local Transport (or its equivalent under the Secondary Company s tariff
         and called Transport in this agreement) compensation will be determined
         for each company by multiplying each of the Secondary Company s
         Transport rates by the



<PAGE>   88
                                                                  Appendix FGA
                                                                   Page 5 of 7

         appropriate MOUs (as calculated under Sections 4.2.1 and 4.2.2.) by the
         Secondary company s percentage ownership of facilities agreed on by the
         Parties and set out in Exhibit B, which is attached hereto and made a
         part hereof.

6.0      REVENUE DISTRIBUTION AMOUNTS, MONTHLY STATEMENTS AND PAYMENTS

6.1      The Primary Company each month will calculate and prepare a monthly
         compensation statement reflecting the revenue distribution amounts for
         FGA, both EAS and non-EAS, access service due the Secondary Company.

6.2      The monthly compensation statement will show, for each Secondary
         Office, separately:

6.2.1    The total number of non-premium or premium terminating MOUs and
         revenue.

6.2.2    The total number on non-premium or premium originating MOUs and
         revenues.

6.2.3    The total compensation due the Secondary Company, by rate element.

6.2.4    The number of terminating MOUs recorded by the Primary Company.

6.2.5    The number of originating MOUs estimated by the Primary Company
         pursuant to Section 4.3 contained herein.

6.2.6    The number of access lines used to prorate originating usage pursuant
         to Section 4.3 contained herein.

6.2.7    The percent ownership factor, if any, used to prorate Local Transport
         revenues.

6.2.8    Adjustments for uncollectibles.

6.3      Within 60 Calendar days after the end of each billing period, the
         Primary Company will remit the compensation amount due the Secondary
         Company. Where more than one compensation amount is due, they may be
         combined into a single payment.

7.0      MISCELLANEOUS PROVISIONS

7.1      This appendix will remain in effect until terminated by thirty (30)
         calendar day s notice by either Party to the other.



<PAGE>   89


                                                                  Appendix FGA
                                                                   Page 6 of 7




                                    EXHIBIT A

                  EAS Locations for Originating and Terminating

                         Feature Group A Access Service

       Primary Office                                 Secondary Office
          Company                                         Company


     CLLI CODE NPA-NXX                    CLLI CODE                    NPA-NXX
     ACCESS LINE




<PAGE>   90
                                                                  Appendix FGA
                                                                   Page 7 of 7




                                    EXHIBIT B

                       Location for LATA Wide Termination

                      of Feature Group A Access Service in

                              Non-EAS Calling Areas



                            SECONDARY OFFICE COMPANY

                                            % Ownership of
CLLI CODE     NPA-NXX      Access Line      Transport Facilities        LATA


<PAGE>   91


                                                                Appendix HOST
                                                                 Page 2 of 5

                                  APPENDIX HOST

This Appendix sets forth the terms and conditions under which SWBT will perform
hosting responsibilities for LSP for (1) the provision of billable message data
and/or access usage data received from such LSP for distribution to the
appropriate billing and/or processing location via SWBT's in-region network or
via the nationwide Centralized Message Distribution System (CMDS) or (2)
billable message data and/or access usage data received from other Local
Exchange Carriers (LECs) or LSPs or from CMDS to be distributed to such LSP.
This Appendix covers hosting in region (i.e., Missouri, Arkansas, Kansas,
Oklahoma and Texas) and hosting out of region. Hosting out of region is only
available to an LSP that is a Full Status Revenue Accounting Office (RAO)
company.

    I.   DEFINITIONS

         A.       Access Usage Record (AUR) - a message record which contains
                  the usage measurement reflecting the service feature group,
                  duration and time of day for a message which is subsequently
                  used by a LEC to bill access to an Interexchange Carrier
                  (IXC).

         B.       Bellcore Client Company Calling Card and Third Number
                  Settlement (BCC CATS) System - nationwide system used to
                  produce information reports that are used in the settlement of
                  LEC or LSP revenues recorded by one BCC (or LEC or LSP within
                  the territory of that BCC) and billed to a customer of another
                  BCC (or LEC or LSP within the territory of that BCC) as
                  described in accordance with the Bellcore Practice BR
                  981-200-110.

         C.       Billable Message Record - a message record containing details
                  of a completed call which has been carried by a LEC over its
                  facilities or by LSP over its facilities and such record is to
                  be used to bill an end user.

         D.       Centralized Message Distribution System (CMDS) - the national
                  network of private line facilities used to exchange Exchange
                  Message Record (EMR) formatted billing data between a company
                  originating a message and the company billing for a message.

         E.       Exchange Message Record (EMR) - industry standard message
                  format as described in accordance with the Bellcore Practice
                  BR 010-200-010 which was developed to facilitate the exchange
                  of telecommunications message information.

         F.       Full Status Revenue Accounting Office (RAO) - an LSP or LEC
                  that is responsible for formatting EMR records, and for
                  editing and packing of such detail records into files for
                  distribution.
<PAGE>   92

                                                                Appendix HOST
                                                                 Page 3 of 5



         G.       In-Region Hosting - includes the transport, using Hosting
                  Company network, of (1) billable message record data for LEC
                  or LSP transported messages and/or access usage record data
                  that originate in a region and are delivered by the LSP to
                  SWBT at a mutually agreed upon location within the territory
                  of SWBT to be sent to another LEC or LSP for billing; and (2)
                  billable message record data and/or access usage data received
                  from CMDS or another LEC or LSP to be delivered to the LSP for
                  billing to its end user located within the five state
                  territory of SWBT.

         H.       Out-of-Region Hosting - includes the transport, using the
                  national CMDS network, of (1) billable message record data for
                  LEC or LSP transported messages and/or access usage record
                  data that originate out of region and are delivered by the LSP
                  to SWBT and are to be sent to another LEC or LSP for billing;
                  and (2) billable message record data and/or access usage data
                  received from CMDS or another LEC or LSP to be delivered to
                  the LSP for billing to its end user located outside SWBT's
                  five state territory.

         I.       Non-Full Status Revenue Accounting Office (RAO) - An LSP or
                  LEC that has assigned responsibility to SWBT for editing,
                  sorting and placing billing message record detail and/or
                  access usage record detail into packs for distribution.

    II.  RESPONSIBILITIES OF THE PARTIES

         A.       All data forwarded from LSP must be in the industry standard
                  EMR format in accordance with Bellcore Practice BR
                  010-200-010. The LSP is responsible to ensure all appropriate
                  settlement plan indicators are included in the message detail,
                  i.e., the Bellcore Client Company Calling Card and Third
                  Number Settlement (BCC CATS) System. The LSP acknowledges that
                  the only message records subject to this Hosting Appendix are
                  those that arise from LEC or LSP transported billable messages
                  and/or access usage records to be used by a LEC or LSP for the
                  purpose of billing access to an IXC.

         B.       When LSP delivers billable message data and/or access usage
                  data to SWBT which must be forwarded to another location for
                  billing purposes, SWBT will accept data from the LSP, perform
                  edits to make message detail and access usage records
                  consistent with CMDS specifications, and use its in region
                  data network to forward this data to the appropriate billing
                  company or to access the national CMDS network in order to
                  deliver this data to the appropriate billing and/or processing
                  company.

                  If LSP is not a Full Status RAO Company, SWBT will also sort
                  billable message detail and access usage record detail by
                  Revenue Accounting Office, Operating Company Number or Service
                  Bureau and split data into packs for invoicing prior to using
                  its in region network to forward this data to the appropriate
                  billing company or to access the national CMDS network in
                  order to deliver such data to the appropriate billing company.
<PAGE>   93
                                                                Appendix HOST
                                                                 Page 4 of 5


         C.       For billable message data and/or access usage data received by
                  SWBT for delivery to an LSP location, SWBT will use its in
                  region data network to receive this data from other LECs or
                  LSPs or from CMDS in order to deliver such billable message
                  data and/or access usage data to the agreed upon billing LSP
                  location.

    III. BASIS OF COMPENSATION

         LSP agrees to pay SWBT a per record charge for billable message records
         and/or access usage records that are received from LSP and destined for
         delivery to another location for billing, at the rates listed below:

              Per Record Charge
                   Full Status RAO Company
                            Hosting Company Network            $.002
                            National CMDS Network              $.005
                   Non-Full Status RAO Company
                            Hosting Company Network            $.007
                            National CMDS Network              $.010

         As part of this per record charge, SWBT will provide Confirmation
         and/or Error Reports and any Intercompany Settlement (ICS) Reports,
         such as the Bellcore Client Company Calling Card and Third Number
         Settlement System (BCC CATS), as needed.

         LSP agrees to pay SWBT a per record charge for billable message records
         and/or access usage records which are entered on a magnetic tape or
         data file for delivery to the LSP, at the rate listed below:

                   Per Record Charge                           $.003

IV.      LIABILITY

         A.       Any failure to populate accurate information in accordance
                  with Section II.A. will be the responsibility of the LSP.

         B.       SWBT will not be liable for any costs incurred by the LSP when
                  the LSP is transmitting data files via data lines and a
                  transmission failure results in the nonreceipt of data by
                  SWBT.

         C.       SWBT SHALL NOT BE LIABLE IN ANY EVENT FOR ANY SPECIAL,
                  INDIRECT, INCIDENTAL, CONSEQUENTIAL, OR EXEMPLARY DAMAGES
                  RESULTING FROM, OR ARISING OUT OF, OR IN CONNECTION WITH, THIS
                  APPENDIX.

         D.       SWBT shall not be liable for any losses or damages arising out
                  of errors, interruptions, defects, failures, or malfunction of
                  the services provided hereunder,



<PAGE>   94
                                                                Appendix HOST
                                                                 Page 5 of 5


                  including any and all associated equipment and data processing
                  systems, except such losses or damages caused by the sole
                  negligence of SWBT. Any losses or damage for which SWBT is
                  held liable under this Appendix shall in no event exceed the
                  amount of charges made for the services provided hereunder
                  during the period beginning at the time SWBT receives notice
                  of the error, interruption, defect, failure or malfunction to
                  the time service is restored.

         E.       The LSP agrees to release, defend, indemnify, and hold
                  harmless SWBT from any and all losses, damages, or other
                  liability, including attorney fees, that it may incur as a
                  result of claims, demands, or other suits brought by any party
                  that arise out of the use of this service by the LSP, its
                  customers or end users. The LSP shall defend SWBT against all
                  end user claims just as if LSP had provided such service to
                  its end users with its own employees.

         F.       The LSP also agrees to release, defend, indemnify and hold
                  harmless SWBT from any claim, demand or suit that asserts any
                  infringement or invasion of privacy or confidentiality of any
                  person(s), caused or claimed to be caused, directly or
                  indirectly, by SWBT employees and equipment associated with
                  provision of this service. This includes, but is not limited
                  to suits arising from disclosure of any customer specific
                  information associated with either the originating or
                  terminating numbers used to provision this service.

    VI.  DISCLAIMER OF WARRANTIES

         SWBT MAKES NO REPRESENTATIONS OR WARRANTIES, EXPRESS OR IMPLIED,
         INCLUDING BUT NOT LIMITED TO ANY WARRANTY AS TO MERCHANTABILITY OR
         FITNESS FOR INTENDED OR PARTICULAR PURPOSE WITH RESPECT TO SERVICES
         PROVIDED HEREUNDER. ADDITIONALLY, SWBT ASSUMES NO RESPONSIBILITY WITH
         REGARD TO THE CORRECTNESS OF THE DATA SUPPLIED BY LSP WHEN THIS DATA IS
         ACCESSED AND USED BY A THIRD PARTY.



<PAGE>   95


                                                                APPENDIX ITR
                                                                 PAGE 2 of 8

                                  APPENDIX ITR
                             (TRUNKING REQUIREMENTS)

This Appendix provides descriptions of the trunking requirements for the LSP and
SWBT interconnection. The attached scenarios depict the recommended trunk groups
for local, intraLATA toll, interLATA "meet point", mass calling, E911 and
Operator Services interconnection. All references to incoming and outgoing trunk
groups are from the perspective of the LSP.

I.       LOCAL TRAFFIC AND INTRALATA TOLL TRAFFIC

         (a)      The LSP Originating (The LSP to SWBT)

                  When SWBT has a combined local and access tandem in an
                  exchange, IntraLATA Toll Traffic may be combined with the
                  Local Traffic on the same trunk group. When SWBT has more than
                  one combined local and access tandem in an exchange, the LSP
                  shall provide a separate trunk group to each SWBT tandem. When
                  there are separate SWBT access and local tandems in an
                  exchange, a separate local trunk group shall be provided to
                  the local tandem and a separate IntraLATA toll trunk group
                  shall be provided to the access tandem. This trunk group(s)
                  shall be one-way or two-way directionalized outgoing only and
                  will utilize Signaling System 7 (SS7) or multifrequency (MF)
                  protocol signaling.

         (b)      The LSP Terminating (SWBT to LSP)

                  When SWBT has a combined local and access tandem, SWBT shall
                  normally combine the Local and IntraLATA Toll Traffic over a
                  single trunk group to the LSP. When SWBT has a separate access
                  and local tandem in an exchange, a trunk group shall be
                  established from each tandem to the LSP. This trunk group(s)
                  shall be one-way or two-way directionalized incoming only and
                  will utilize SS7 or MF protocol signaling.

         (c)      Direct End Office Trunking

                  The Parties shall establish direct end office primary high
                  usage trunk groups for Local Traffic and/or IntraLATA Toll
                  Traffic when end office traffic requires twelve or more
                  trunks. If LSP has established collocation to the end office,
                  the trunks shall be provisioned over the LSP collocation
                  facility. If the LSP has no collocation facilities, SWBT shall
                  provision the trunks from the NIP to the end office. IntraLATA
                  Toll Traffic shall be provided over a separate trunk group to
                  the SWBT access tandem.



<PAGE>   96
                                                               APPENDIX ITR
                                                                PAGE 3 of 8



    II.  ACCESS TOLL CONNECTING TRUNKS

         InterLATA traffic shall be transported between the LSP Central Office
         and the SWBT access tandem over a "meet point" trunk group separate
         from local and intraLATA toll traffic. The access toll connecting trunk
         group will be established for the transmission and routing of Exchange
         Access traffic between the LSP's end users and interexchange carriers
         via a SWBT access tandem. When SWBT has more than one access tandem
         within an exchange, the LSP shall utilize a single access toll
         connecting trunk group to one SWBT tandem within the exchange. This
         trunk group may be set up as one-way or two-way (two-way is preferred)
         and will utilize SS7 or MF protocol signaling. The traffic use code and
         modifier for this trunk group should be MDJ (see Scenario 1, 2, 3, or
         4).

    III. 800 (888) TRAFFIC

         If the LSP chooses SWBT to handle 800 (888) database queries from its
         central office switches, all the LSP originating 800 (888) service
         queries will be routed over the InterLATA Interexchange Carrier (MDJ)
         trunk group. This traffic will include a combination of both InterLATA
         Interexchange Carrier 800 (888) service and IntraLATA LEC 800 (888)
         service that will be identified and segregated by carrier through the
         database query handled through the SWBT tandem switch.

         A separate trunk group from each Party to the other will be required
         for IntraLATA 800 service if either Party chooses to handle the 800
         database queries from its switch location. The purpose of the separate
         trunk group is to provide for the segregation of originating 800
         IntraLATA call volumes to ensure the proper billing of intercompany
         settlement compensation.

         The trunk group shall be set up as one-way outgoing only and will
         utilize SS7 protocol signaling. The traffic use code and modifier for
         this trunk group should be DD800J (see Scenario 1, 2, 3, or 4).

    IV.  E911

         A segregated trunk group will be required to each appropriate E911
         tandem within the exchange in which the LSP offers the Exchange
         Service. This trunk group shall be set up as a one-way outgoing only
         and shall utilize MF CAMA signaling. The traffic use code and modifier
         for this trunk group shall be ESJ (see Scenario 1, 2, 3, or 4).

    V.   MASS CALLING (PUBLIC RESPONSE CHOKE NETWORK)

         A segregated trunk group shall be required to the designated Public
         Response Choke Network tandem in each serving area. This trunk group
         shall be one-way outgoing only and shall utilize MF signaling. It is
         recommended that this group be sized as follows:
<PAGE>   97

                                                               APPENDIX ITR
                                                                 PAGE 4 of 8



         <15001 access lines (AC)                    2 trunks (min)
           15001 to 25000 AC                         3 trunks
           25001 to 50000 AC                         4 trunks
           50001 to 75000 AC                         5 trunks
         >75000 AC                                   6 trunks (max)

         The traffic use code and modifier for this trunk group shall be TOCRJ
         (see Scenario 1, 2, 3, or 4).

    VI.  OPERATOR SERVICES

         (a)      No Operator Contract:

                  Inward Operator Assistance (Toll Center (TC) Code plus 121) -
                  The LSP may choose from two interconnection options for Inward
                  Operator Assistance as follows:

                  Option 1 - Interexchange Carrier (IXC) Carrier

                  The LSP may utilize the Interexchange Carrier Network (see
                  Scenario 6). The LSP operator will route its calls requiring
                  inward operator assistance through its designated IXC POP to
                  SWBT's TOPS tandem. SWBT shall route its calls requiring
                  inward operator assistance to the LSP's Designated Operator
                  Switch (TTC) through the designated IXC POP.

                  Option 2 - The LSP Operator Switch

                  The LSP reports its switch as the designated serving operator
                  switch (TTC) for its NPA-NXXs and requests SWBT to route its
                  calls requiring inward operator assistance to the LSP. This
                  option requires a segregated two-way (with MF signaling) trunk
                  group from SWBT's Access Tandem to the LSP switch. The traffic
                  use code and modifier for this trunk group should be OAJ (see
                  Scenario 7). The LSP's operator will route its calls requiring
                  inward operator assistance to SWBT's operator over an IXC
                  network.

         (b)      Operator Contract with SWBT:

                  (i)      Directory Assistance (DA):

                           The LSP may contract for DA services only. A
                           segregated trunk group for these services would be
                           required to SWBT's TOPS tandem. This trunk group is
                           set up as one-way outgoing only and utilizes MF and
                           Operator Services signaling. The traffic use code and
                           modifier for this trunk group should be DAJ (see
                           Scenario 5).
<PAGE>   98
                                                               APPENDIX ITR
                                                                 PAGE 5 of 8

                  (ii)     Directory Assistance Call Completion (DACC):

                           The LSP contracting for DA services may also contract
                           for DACC. This requires a segregated one-way trunk
                           group to SWBT's TOPS tandem. This trunk group is set
                           up as one-way outgoing only and utilizes MF
                           signaling. The traffic use code and modifier for this
                           trunk group should be DACCJ (see Scenario 5).

                  (iii)    Busy Line Verification:

                           When SWBT's operator is under contract to verify the
                           LSP's end user loop, SWBT will utilize a segregated
                           one-way with MF signaling trunk group from SWBT's
                           Access Tandem to the LSP switch. The traffic use code
                           and modifier for this trunk group should be VRJ (see
                           Scenario 5).

                  (iv)     Operator Assistance (0+, 0-):

                           This service requires a one-way trunk group from the
                           LSP switch to SWBT's TOPS tandem. Two types of trunk
                           groups may be utilized. If the trunk group transports
                           DA/DACC, the trunk group will be designated as ETCMFJ
                           (0-, 0+, DA, DACC) (see Scenario 5). If DA is not
                           required or is transported on a segregated trunk
                           group, then the group will be designated as ETCM2J
                           (see Scenario 5). MF and Operator Services signaling
                           will be required on the trunk group.

    VII. Trunk Design Blocking Criteria

         Trunk forecasting and servicing for the Local and IntraLATA Toll trunk
         groups shall be based on the industry standard objective of 2% overall
         time consistent average busy season busy hour loads (1% from the End
         Office to the Tandem and 1% from the Tandem to the End Office based on
         Neil Wilkinson B.01M [Medium Day-to-Day Variation] until traffic data
         is available ). Listed below are the trunk group types and their
         objectives:

         Trunk Group Type                  Blocking Objective (Neil Wilkinson M)
         -----------------------------------------------------------------------
         Local Tandem                                     1%
         Local Direct                                     2%
         IntraLATA Interexchange                          1%
         911                                              1%
         Operator Services (DA/DACC)                      1%
         Operator Services (0+, 0-)                       0.5%
         InterLATA Tandem                                 0.5%

<PAGE>   99
                                                               APPENDIX ITR
                                                                 PAGE 6 of 8



   VIII. FORECASTING/SERVICING RESPONSIBILITIES

         Both Parties agree to provide an initial forecast for establishing the
         initial interconnection facilities. Subsequent forecasts will be
         provided on a semi-annual basis concurrent with the publication of the
         SWBT General Trunk Forecast including yearly forecasted trunk
         quantities for all trunk groups described in this Appendix for a
         minimum of three years and the use of Common Language Location
         Identifier (CLLI-MSG) which is described in Bellcore documents
         BR795-100-100 and BR795-400-100. Trunk servicing will be performed on a
         monthly basis at a minimum.

         SWBT shall be responsible for forecasting and servicing the trunk
         groups terminating to the LSP. The LSP shall be responsible for
         forecasting and servicing the trunk groups terminating to SWBT end
         users and/or to be used for tandem transit to other provider's
         networks, operator services and DA service, and interLATA toll service.
         Standard trunk traffic engineering methods will be used as described in
         Bell Communications Research, Inc. (Bellcore) document SR-TAP-000191,
         Trunk Traffic Engineering Concepts and Applications.

   IX.   TRUNK SERVICING
 
         1.       Orders between the Parties to establish, add, change or
                  disconnect trunks shall be processed by use of an Access
                  Service Request ("ASR").

         2.       All Parties shall jointly manage the capacity of local
                  Interconnection Trunk Groups. Either Party may send the other
                  Party an ASR to initiate changes to the Local Interconnection
                  Trunk Groups that the ordering Party desires based on the
                  ordering Party's capacity assessment. The receiving Party will
                  issue a Firm Order Confirmation ("FOC") and a Design Layout
                  Record ("DLR") to the ordering Party within five (5) business
                  days after receipt of the ASR.

         3.       Orders that comprise a major project (i.e., new switch
                  deployment) shall be submitted in a timely fashion, and their
                  implementation shall be jointly planned and coordinated.

         4.       SWBT will process trunk service requests submitted via a
                  properly completed ASR within twenty (20) business days of
                  receipt of such ASR. Facilities must also be in place before
                  trunk orders can be completed.

         5.       In the event that a Party requires trunk servicing within
                  shorter time intervals than those provided for in this Article
                  XI due to a bona fide end user demand, such Party may
                  designate its ASR as an "Expedite" and the other Party shall
                  use best efforts to issue its FOC and DLR and install service
                  within the requested interval.

         6.       Each Party shall be responsible for engineering their networks
                  on their side of the NIP.
<PAGE>   100
                                                               APPENDIX ITR
                                                                 PAGE 7 of 8




    X.   SERVICING OBJECTIVE/DATA EXCHANGE

         Each Party agrees to service trunk groups to the foregoing blocking
         criteria in a timely manner when trunk groups exceed measured blocking
         thresholds on an average time consistent busy hour for a 20 business
         day study period. Upon request, each Party will make available to the
         other, trunk group measurement reports for trunk groups terminating in
         the requesting Party's network. These reports will contain offered
         load, measured in CCS (100 call seconds), that has been adjusted to
         consider the effects of overflow, retrials and day-to-day variation.
         They will also contain overflow CCS associated with the offered load,
         day-to-day variation, peakedness factor, the date of the last week in
         the four week study period and the number of valid days of measurement.
         These reports shall be made available at a minimum on a semi-annual
         basis upon request.

    XI.  SPECIFICATIONS

         All DS-1 and DS-3 facilities utilized for trunking established or
         employed by the Parties for purposes of this STC shall meet the
         specifications set forth in SWBT's TP-76625 dated June, 1990 and
         TP-76839 dated January, 1996.

    XII. TRUNK FACILITY UNDER UTILIZATION

         At least once a year the Parties shall exchange trunk group measurement
         reports as detailed above for trunk groups terminating to the other
         Party's network. Each Party will determine the required trunks for each
         of the other Party's trunk groups for the previous 12 months. Required
         trunks will be based on the Blocking Objectives under "Trunk Design
         Blocking Criteria" above and time consistent average busy hour usage
         measurements from the highest 4 consecutive week (20 business day)
         study. Trunk groups with excess capacity will be identified to the
         other Party as eligible for downsizing. Excess capacity exists when a
         trunk group, on a modular trunk group design basis, has 48 trunks (2
         modular digroups) or 10%, whichever is larger, over the required number
         of trunks.

         The party with excess trunking capacity will assess the trunk capacity
         based on forecasted requirements and agrees to disconnect trunks in
         excess of forecasted requirements for the next 12 months. If after 12
         months the trunk group continues to have excess capacity the party
         agrees to take timely steps to disconnect all excess capacity.

   XIII. Where available and upon the request of the other Party, each Party
         shall cooperate to ensure that its trunk groups are configured
         utilizing the B8ZS ESF protocol for 64 kbps clear channel transmission
         to allow for ISDN interoperability between the Parties' respective
         networks.
<PAGE>   101
                                                               APPENDIX ITR
                                                                 PAGE 8 of 8




    XIV. INSTALLATION, MAINTENANCE, TESTING AND REPAIR. SWBT's standard
         intervals for Feature Group D Switched Exchange Access Services will be
         used for Interconnection trunks as specified in the most current SWBT
         Accessible Letter, currently SWA96-036, dated April 15, 1996. The LSP
         shall meet the same intervals for comparable installations,
         maintenance, joint testing, and repair of its facilities and services
         associated with or used in conjunction with Interconnection or shall
         notify SWBT of its inability to do so and will negotiate such intervals
         in good faith.





<PAGE>   102


                                                       APPENDIX ITR - SCENARIOS
                                                                   PAGE 1 of 7

                                   SCENARIO 1

              SINGLE RATE AREA - COMBINED SWBT LOCAL/ACCESS TANDEM
                WITHOUT DIRECT END OFFICE, ILEC OR IXC TRUNKING

                                    [CHART]





TRAFFIC USE/MODIFIER            DESCRIPTION

1. DDJ                          INTRALATA AND LOCAL (SS7 SIGNALING)
2. TCJ                          INTRALATA AND LOCAL (SS7 SIGNALING)
3. TOCRJ                        MASS CALLING (MF SIGNALING)
4. DD800J                       INTRALATA 800 (MAXIMIZER 800)(SS7 SIGNALING) #
5. MDJ                          INTERLATA ONLY (MF SIGNALING) @
6. MDJ                          INTERLATA ONLY (SS7 SIGNALING)
7. ESJ                          EMERGENCY SERVICE (MF SIGNALING)

@  Required at the Dallas 4 ESS switch only for 10XXXX # cut through and Feature
   Group B over D.

#  Required if SWBT does not perform the database query for the LSP.




                                                                Revised 6/17/96
                                                                LSP1.AF3



<PAGE>   103

                                                       APPENDIX ITR - SCENARIOS
                                                                   PAGE 2 of 7




                                   SCENARIO 2

              SINGLE RATE AREA - COMBINED SWBT LOCAL/ACCESS TANDEM
               WITH SOME DIRECT END OFFICE, ILEC AND IXC TRUNKING



                                    [CHART]
















TRAFFIC USE/MODIFIER         DESCRIPTION

1. IEJ                       LOCAL ONLY (SS7 SIGNALING)
2. IEJ                       LOCAL ONLY (SS7 SIGNALING)
3. DDJ                       INTRALATA AND LOCAL (SS7 SIGNALING)
4. TCJ                       INTRALATA AND LOCAL (SS7 SIGNALING)
5. TOCRJ                     MASS CALLING (MF SIGNALING)
6. DD800J                    INTRALATA 800 (MAXIMIZER 800) (SS7 SIGNALING) #
7. MDJ                       INTERLATA ONLY (MF SIGNALING) @
8. MDJ                       INTERLATA ONLY (SS7 SIGNALING)
9. ESJ                       EMERGENCY SERVICE (MF SIGNALING)

@  Required at the Dallas 4 ESS switch only for 10XXXX # cut through and Feature
   Group B over D.

#  Required if SWBT does not perform the database query for the LSP.

                                                                Revised 6/17/96
                                                                LSP2.AF3



<PAGE>   104


                                                       APPENDIX ITR - SCENARIOS
                                                                   PAGE 3 of 7


                                   SCENARIO 3

                SINGLE RATE AREA - SEPARATE SWBT LOCAL AND ACCESS
             TANDEMS WITHOUT DIRECT END OFFICE, ILEC OR IXC TRUNKING



                                    [CHART]
















TRAFFIC USE/MODIFIER            DESCRIPTION

1. TOJ                          LOCAL ONLY (SS7 SIGNALING)
2. TGJ                          LOCAL ONLY (SS7 SIGNALING)
3. TOCRJ                        MASS CALLING (MF SIGNALING)
4. DD800J                       INTRALATA 800 (MAXIMIZER 800) (SS7 SIGNALING) #
5. DDJ                          INTRALATA ONLY (SS7 SIGNALING)
6. TCJ                          INTRALATA ONLY (SS7 SIGNALING)
7. MDJ                          INTERLATA ONLY (SS7 SIGNALING)
8. ESJ                          EMERGENCY SERVICE (MF SIGNALING)

#  Required if SWBT does not perform the database query for the LSP.





                                                                Revised 12/30/96
                                                                LSP3.AF3



<PAGE>   105

                                                       APPENDIX ITR - SCENARIOS
                                                                   PAGE 4 of 7


                                   SCENARIO 4

                SINGLE RATE AREA - SEPARATE SWBT LOCAL AND ACCESS
           TANDEMS WITH SOME DIRECT END OFFICE, ILEC AND IXC TRUNKING




                                    [CHART]
















TRAFFIC USE/MODIFIER           DESCRIPTION

1. IEJ                         LOCAL ONLY (SS7 SIGNALING)
2. IEJ                         LOCAL ONLY (SS7 SIGNALING)
3. TOJ                         LOCAL ONLY (SS7 SIGNALING)
4. TGJ                         LOCAL ONLY (SS7 SIGNALING)
5. TOCRJ                       MASS CALLING (MF SIGNALING)
6. DD800J                      INTRALATA 800 (MAXIMIZER 800) (SS7 SIGNALING) #
7. DDJ                         INTRALATA ONLY (SS7 SIGNALING)
8. TCJ                         INTRALATA ONLY (SS7 SIGNALING)
9. MDJ                         INTERLATA ONLY (SS7 SIGNALING)
10. ESJ                        EMERGENCY SERVICE (MF SIGNALING)

#  Required if SWBT does not perform database query for the LSP.



                                                               Revised 12/30/96
                                                               LSP4.AF3



<PAGE>   106

                                                       APPENDIX ITR - SCENARIOS
                                                                   PAGE 5 of 7




                                   SCENARIO 5

              SINGLE RATE AREA - COMBINED SWBT LOCAL/ACCESS TANDEM
            WHERE SWBT IS THE OPERATOR SERVICES PROVIDER FOR THE LSP



                                    [CHART]




















TRAFFIC USE/MODIFIER  DESCRIPTION

1. VRJ                BUSY LINE VERIFICATION (MF SIGNALING) #
2. DAJ or DACCJ       DIRECTORY ASSISTANCE or DIRECTORY ASSISTANCE CALL
                      COMPLETION (MF SIGNALING, OPERATOR SERVICES SIGNALING)
3. ETCM2J             0-, 0+ COMBINED COIN AND NONCOIN (MF SIGNALING, OPERATOR
                      SERVICES SIGNALING)
4. ETCMFJ             0-, 0+, DA, DACC COMBINED COIN AND NONCOIN (MF SIGNALING,
                      OPERATOR SERVICES SIGNALING)

# Busy Line Verification is sometimes trunked out from the TOPS Tandem rather
than the Access Tandem.





                                                                Revised 1/7/97
                                                                LSP5.AF3



<PAGE>   107

                                                      APPENDIX ITR - SCENARIOS
                                                                   PAGE 6 OF 7



                                   SCENARIO 6

              SINGLE RATE AREA - COMBINED SWBT LOCAL/ACCESS TANDEM
          WHERE SWBT IS NOT THE OPERATOR SERVICES PROVIDER FOR THE LSP

                         121 INWARD OPERATOR ASSISTANCE






                                    [CHART]










Note:  THIS SCENARIO WOULD USE EXISTING INTEREXCHANGE CARRIER NETWORK.















                                                                REVISED 6/17/96
                                                                LSP6.AF3



<PAGE>   108
                                                    APPENDIX ITR - SCENARIOS
                                                                   PAGE 7 OF 7




                                   SCENARIO 7

              SINGLE RATE AREA - COMBINED SWBT LOCAL/ACCESS TANDEM
                WHERE SWBT IS NOT THE OPERATOR SERVICES PROVIDER
               FOR THE LSP AND THE LSP'S SWITCH IS THE DESIGNATED
                 OPERATOR SWITCH (TTC) FOR 121 INWARD ASSISTANCE




                                    [CHART]

















TRAFFIC USE/MODIFIER        DESCRIPTION
1. OAJ                      ACCESS TO INWARD OPERATOR (121) (MF SIGNALING)













                                                                REVISED 6/17/96
                                                                LSP7.AF3





<PAGE>   109


                                                                 APPENDIX LIDB
                                                                       Page 2

                                  APPENDIX LIDB

             AGREEMENT FOR THE PROVISION OF DATA BASE ADMINISTRATION
                                       AND
                    LINE INFORMATION DATABASE (LIDB) STORAGE

This Appendix, between SWBT and LSP sets forth the terms and conditions upon
which SWBT will provide data base administration to store LSP's line/billing
records in SWBT's Line Information Data Base (LIDB).

WHEREAS, SWBT owns and maintains a Line Validation Administration System (LVAS)
that provides facilities for adding, deleting, and changing information in LIDB;
and

WHEREAS, SWBT maintains LIDB for various purposes, including the validation of
alternately billed service (ABS) requests and the provision of other services;
and

WHEREAS LSP desires to have SWBT use LVAS to administer LSP's line information
cords for the provision of services set forth in the exhibits attached to this
Appendix; and

WHEREAS SWBT is willing to provide, where equipment, processing capability and
hardware configurations permit, such LVAS services and LIDB storage for LSP; and

WHEREAS, SWBT owns and maintains a Sleuth System that provides facilities for
ABS fraud monitoring; and

WHEREAS LSP desires SWBT to use its Sleuth System for ABS fraud monitoring of
its telecommunications traffic.

NOW, THEREFORE, in consideration of the mutual promises and undertakings made,
the parties agree as follows:

1.       DEFINITIONS

         As used herein and for the purpose of this Appendix, the following
         terms shall have the meanings set forth below:

         A.       Alternate Billing Services (ABS) - A service that allows end
                  users to bill calls to accounts that may not be associated
                  with the originating line. There are three types of ABS calls:
                  calling card, collect and third number billed calls.

         B.       Billed Number Screening (BNS) - A process which utilizes a
                  database to determine specific characteristics and/or end user
                  preferences with respect to a billed number.



<PAGE>   110
                                                                 APPENDIX LIDB
                                                                       PAGE 3



         C.       Calling Card Service (CCS) - A service which enables a calling
                  customer to bill a telephone call to a calling card number
                  with or without the help of an operator.

         D.       Data Base - An integrated collection of related data. In the
                  case of the LIDB, the data base is the line number and related
                  line information.

         E.       Data Base Administration Center (DBAC) - The LIDB input center
                  where the LVAS facility and administrative personnel are
                  currently located.

         F.       Exchange - For the purpose of this Appendix, a specific
                  NPA-NXX combination.

         G.       Group Record - Information in LIDB or LVAS that is common to
                  all lines or billing records in an NPA-NXX or NPA-RAO.

         H.       LIDB Editor - A database editor located at the SCP where LIDB
                  resides. LIDB ditor provides emergency access to LIDB that
                  bypasses the service management system for LIDB.

         I.       Line Validation Administration System (LVAS) - An off-line
                  administrative system, used by SWBT to add, delete and change
                  information in LIDB.

         J.       Line Information Data Base (LIDB) - The line information
                  database, which is an ANSI SS7 database system, functions as a
                  centralized repository for data storage and retrieval. LIDB
                  supports validation and recording of ABS requests. LIDB also
                  supports storage, retrieval and recording capabilities for
                  other information that can be associated with an end user's
                  line. Examples of such information are, or are expected to be,
                  originating screening information, ZIP code data and calling
                  name.

         K.       Line Record - Information in LIDB or LVAS that is specific to
                  a single telephone number or special billing number.

         L.       Personal Identification Number (PIN) - A confidential four
                  digit code number provided to a calling card customer to
                  prevent unauthorized use of his/her calling card number. The
                  PIN is stored in the LIDB for those line numbers that have an
                  associated calling card.

         M.       Response - A single response in a set of predefined expected
                  responses to a request for information contained in a query
                  from a computer processor.



<PAGE>   111
                                                                 APPENDIX LIDB
                                                                       Page 4



         N.       Toll Billing Exception (TBE) - A LIDB option that allows end
                  users to restrict third number billing or collect calls to
                  their lines.

         O.       Service Management System (SMS) - An off-line system used to
                  access, create, modify, or update information in LIDB. For the
                  purposes of this appendix, the SMS for LIDB is LVAS.

         P.       Sleuth - An off-line administration system that SWBT uses to
                  monitor suspected occurrences of ABS-related fraud. Sleuth
                  uses a systematic pattern analysis of query message data to
                  identify potential incidences requiring fraud investigation.
                  Detection parameters are based upon vendor recommendations and
                  SWBT's analysis of collected data and are subject to change
                  from time to time.

         Q.       Special Billing Number (SBN) Account Groups - Line records in
                  LIDB that are based on an NPA-RAO numbering format. NPA-RAO
                  numbering formats are similar to NPA-NXX formats except that
                  the fourth digit of an NPA-RAO line record is either a zero
                  (0) or a one (1).

         R.       Tape Load Facility - A separate data entry point at the SCP
                  where LIDB resides. The Tape Load Facility provides direct
                  access to LIDB for data administration that bypasses the
                  service management system for SWBT's LIDB.

         S.       Translation Type - A code in the Signaling Connection Control
                  Point (SCCP) of the SS7 signaling message. Translation Types
                  are used for routing LIDB queries. Signal Transfer Points
                  (STPs) use Translation Types to identify the routing table
                  used to route a LIDB query. All LIDB queries against the same
                  exchange and Translation Type are routed to the same LIDB.

2.       General Description

         A.       SWBT's LIDB is connected directly to a service management
                  system (i.e., LVAS), a database editor (i.e., LIDB Editor),
                  and a tape load facility. Each of these facilities, processes,
                  or systems, provide SWBT with the capability of creating,
                  modifying, changing, or deleting, line/billing records in
                  LIDB. SWBT's LIDB is also connected directly to an adjunct
                  fraud monitoring system (i.e., Sleuth).

         B.       SWBT will provide LSP with access to LVAS, LIDB Editor, and
                  tape load facility as set forth in this Appendix and the
                  Exhibit or Exhibits attached hereto. SWBT warrants that the
                  manner in which it provides such access to LSP will be
                  equivalent to the manner in which SWBT provides such access to
                  itself.



<PAGE>   112
                                                                 APPENDIX LIDB
                                                                       PAGE 5



         C.       SWBT will also provide LSP with fraud alerts from Sleuth as
                  set forth in this Appendix and in Exhibit IV (Sleuth). SWBT
                  warrants that it will provide fraud alerts to LSP using the
                  same fraud monitoring parameters as SWBT uses for itself.

         D.       From time-to-tome, SWBT enhances its LIDB to create new
                  services and/or LIDB functionalities. Such enhancements may
                  involve the creation of new line-level or group-level data
                  elements in LIDB. SWBT will coordinate with LSP to provide LSP
                  with the opportunity to update its data concurrent with SWBT's
                  updates of SWBT's own data. Both parties understand and agree
                  that some LIDB enhancements will require LSP to update its
                  line/billing records with new or different information.

         E.       Charges for the provisioning of Data Base Administration and
                  LIDB Storage are set forth in Exhibit II (Basis of
                  Compensation).

3.       Service Description

         3.1      LVAS

                  LVAS provides LSP with the capability to access, create,
modify or update information in LIDB. LVAS has two electronic interfaces. These
interfaces are the Service Order Entry Interface and the Interactive Interface.

                  3.1.1    Service Order Entry Interface

                           (A)      The Service Order Entry Interface provides
                                    LSP with unbundled access to SWBT's LVAS
                                    that is equivalent to SWBT's own service
                                    order entry process to LVAS. Service Order
                                    Entry Interface allows LSP to electronically
                                    transmit properly formatted records from
                                    LSP's service order process into LVAS.

                           (B)      LSP's access to the Service Order Entry
                                    Interface will be through a remote access
                                    facility (RAF). The RAF will provide SWBT
                                    with a security gateway for LSP access to
                                    the Service Order Entry Interface. The RAF
                                    will verify the validity of LSP's
                                    transmissions and limit LSP's access to
                                    SWBT's Service Order Entry Interface to
                                    LVAS. LSP does not gain access to any other
                                    SMS, interface, database, or operations
                                    support system through this Appendix.

                           (C)      SWBT will provide LSP with the file transfer
                                    protocol
<PAGE>   113
                                                                 APPENDIX LIDB
                                                                       PAGE 6



                                    specifications LSP will use to administer
                                    LSP's data over the Service Order Entry
                                    Interface. LSP acknowledges that
                                    transmission in such specified protocol is
                                    necessary for SWBT to provide LSP with Data
                                    Base Administration and Storage.

                           (D)      LSP can choose the Service Order Entry
                                    Interface as its only interface to LVAS and
                                    LIDB or the LSP can choose to use this
                                    interface in conjunction with any other
                                    interface that SWBT provides under this
                                    Appendix except the Manual Interface.

                           (E)      SWBT will provide LSP with SWBT-specific
                                    documentation for properly formatting the
                                    records LSP will transmit over the Service
                                    Order Entry Interface.

                           (F)      LSP understands that its record access
                                    through the Service Order Entry Interface
                                    will be limited to its own line/billing
                                    records.

                  3.1.2    Interactive Interface

                           (A)      The Interactive Interface provides LSP with
                                    unbundled access to SWBT's LVAS that is
                                    equivalent to SWBT's access at its LIDB
                                    DBAC. Interactive Interface provides LSP
                                    with the ability to have its own personnel
                                    access LSP's records via an application
                                    screen that is presented on a computer
                                    monitor. Once LSP has accessed one of its
                                    line/billing records, LSP can perform all of
                                    the data administration tasks SWBT's LIDB
                                    DBAC personnel can perform on SWBT
                                    line/billing records.

                           (B)      SWBT will provide LSP with Interactive
                                    Interface through a modem. LSP understands
                                    that its record access through the
                                    Interactive Interface will be limited to its
                                    own line/billing records.

                           (C)      LSP will use hardware and software that is
                                    compatible with LVAS hardware and software.

                           (D)      LSP can choose to request the Interactive
                                    Interface as its only interface to LVAS and
                                    LIDB or the LSP can choose to use this
                                    interface in conjunction with any other
                                    interface that SWBT provides under this
                                    Appendix except the Manual Interface.

                           (E)      SWBT will provide LSP with SWBT-specific
                                    documentation in the form of screen prints
                                    and prints of help screens.
<PAGE>   114
                                                                 APPENDIX LIDB
                                                                       PAGE 7



                  3.1.3    Manual Interface

                           (A)      Manual Interface is available only if the
                                    LSP has 1,000 line/billing records or less.
                                    Manual Interface allows LSP to fax updates
                                    to SWBT's LIDB DBAC. SWBT's LIDB DBAC
                                    personnel will manually enter these faxed
                                    updates into LVAS for LSP.

                           (B)      Manual Interface is not available with any
                                    other interface SWBT provides under this
                                    Appendix.

                           (C)      LSP understands that its record access
                                    through the Manual Interface will be limited
                                    to its own line/billing records.

         3.2      Tape Load Facility Interface

                  (A)      Tape Load Facility Interface provides LSP with
                           unbundled access to SWBT's Tape Load Facility in the
                           same manner that SWBT accesses this facility. Tape
                           Load Facility Interface allows LSP to create and
                           submit magnetic tapes for input into LIDB.

                  (B)      The Tape Load Facility Interface is not an interface
                           to LVAS. The Tape Load Facility Interface is an entry
                           point to LIDB at the SCP where LIDB resides.

                  (C)      The Tape Load Facility Interface is available only
                           when the amount of information is too large for LVAS
                           to accommodate. Both parties agree that these
                           situations normally occur during the initial load of
                           LSP's information into LIDB or when LIDB is updated
                           for a new product. The Tape Load Facility Interface
                           is not available for ongoing updates of information.
                           LSP may request the Tape Load Facility Interface only
                           when its updates exceed 100,000 line/billing records
                           over and above the LSP's normal daily update
                           processing.

                  (D)      LSP will create its own tapes in formats specified in
                           GR-446-CORE, Issue 2, June 1994, as revised. Such
                           tapes will only include information associated with
                           LSP's line/billing records.

                  (E)      LSP will deliver a separate set of tapes, each having
                           identical information to each SCP node on which LIDB
                           resides. SWBT will provide LSP with the name and
                           address of the SWBT employee designated to receive
                           the tapes at each location.



<PAGE>   115


                                                                 APPENDIX LIDB
                                                                       Page 8

                  (F)      In addition to the tapes LSP will create and deliver
                           to the SCP node locations, LSP shall deliver an
                           additional set of tapes to the LVAS System
                           Administrator so that SWBT can load LSP's updates
                           into LVAS. LSP understand that these additional tapes
                           must contain information identical to the tapes
                           delivered to the SCP nodes, but that the format will
                           differ. SWBT shall provide LSP SWBT-specific
                           documentation for record formations of these
                           additional tapes. SWBT shall use these tapes to
                           create LSP records in LVAS that correspond with the
                           records being loaded into LIDB using the Tape Load
                           Facility Interface. SWBT shall provide LSP with the
                           name and address of the SWBT System Administrator to
                           whom the LVAS update tapes should be sent.

                  (G)      SWBT and LSP shall negotiate mutually agreed upon
                           dates and times for tape loads of LSP data when such
                           loads are the result of an LSP request.

                  (H)      LSP understands and agrees that its record access
                           through the Tape Load Facility Interface is only for
                           LSP's own line/billing records. LSP warrants that it
                           shall not use the Tape Load Facility Interface to
                           modify any group record. LSP further warrants that it
                           shall not use the Tape Load Facility Interface to
                           modify any line/billing record not belonging to LSP.

         3.3      LIDB Editor Interface

                  (A)      LIDB Editor Interface provides LSP with unbundled
                           access to SWBT's LIDB Editor equivalent to SWBT's
                           manner of access. LIDB Editor provides LSP with
                           emergency access to LIDB only when LVAS is unable to
                           access LIDB or is otherwise inoperable.

                  (B)      LIDB Editor Interface is not an interface to LVAS.
                           LIDB Editor is an SCP tool accessible only by
                           authorized SWBT employees. LSP shall have access to
                           SWBT employees authorized to access LIDB Editor
                           during the same times and under the same conditions
                           that SWBT has access to LIDB Editor.

                  (C)      LSP understands that its record access through the
                           LIDB Editor Interface is limited to its own
                           line/billing records.

         3.4      Audits

                  SWBT shall provide LSP with access equivalent to SWBT's own
                  access to LVAS audit functionalities.


<PAGE>   116
                                                                 APPENDIX LIDB
                                                                       Page 9



                  3.4.1    LIDB Audits

                           (A)      This audit is between LVAS and LIDB. This
                                    audit verifies that LVAS records match LIDB
                                    records. The LIDB Audit is against all line
                                    records and group record information in LVAS
                                    and LIDB, regardless of data ownership.

                           (B)      SWBT shall run the LIDB audit continuously
                                    throughout each and every day.

                           (C)      SWBT shall create a "variance file" of all
                                    LSP records that fail the LIDB audit. LSP
                                    can access these files through the
                                    Interactive Interface.

                           (D)      LSP shall investigate accounts that fail the
                                    LIDB audit and correct any discrepancies as
                                    set forth in paragraph 3(H). LSP shall
                                    correct all discrepancies using the LVAS
                                    interface(s) LSP has requested under this
                                    Appendix.

                  3.4.2    Billing System Audit

                           (A)      This type of audit is between LVAS and
                                    SWBT's billing system(s). This audit
                                    verifies that LVAS records match SWBT's
                                    billing system records.

                           (B)      SWBT shall provide LSP with access
                                    equivalent to SWBT's own access to the
                                    billing system audit functionality. SWBT
                                    shall provide LSP with a file containing LSP
                                    records in LIDB. LSP shall specify if the
                                    billing system audit tape will be delivered
                                    by either magnetic tape or electronically
                                    over the Service Order Entry Interface.

                           (C)      LSP shall audit its LIDB accounts against
                                    LSP's billing system and correct any
                                    discrepancies as set forth in paragraph
                                    3(H). LSP shall correct all discrepancies
                                    using the LVAS interface(s) LSP has
                                    requested under this Appendix.

                           (C)      SWBT shall provide LSP scheduled and
                                    unscheduled billing system audits as set
                                    forth below:

                                    (1)     Scheduled Audits

                                            SWBT shall provide LSP with a
                                            billing system audit file
<PAGE>   117
                                                                 APPENDIX LIDB
                                                                       PAGE 10



                                            twice per year. Such audit files
                                            will represent LSP's entire data
                                            store in LVAS. The Parties shall
                                            mutually agree upon the dates such
                                            audit files will be provided.

                                    (2)     Unscheduled Audits

                                            LSP can request additional audit
                                            files and SWBT will work
                                            cooperatively to accommodate all
                                            reasonable LSP requests for such
                                            additional audit files. Charges for
                                            additional audit files shall apply
                                            as set forth in Exhibit II (Basis
                                            for Compensation).

         3.5      Sleuth

                  (A)      Sleuth notification provides LSP with Sleuth alert
                           messages. Sleuth alert messages indicate potential
                           incidences of ABS-related fraud for investigation.

                  (B)      Sleuth historical reports are available to LSP as set
                           forth in Exhibit IV (Sleuth).

3.       Manner of Provisioning

         (A)      SWBT shall provide to LSP, on request, SWBT-specific
                  documentation regarding record formatting and associated
                  hardware requirements for LSP to access each of the interfaces
                  SWBT provides for LIDB data administration.

         (B)      LSP shall obtain, at its own expense, all necessary
                  documentation produced by non-SWBT entities such as Bellcore.

         (C)      Magnetic tapes submitted by LSP must conform to the hardware
                  specifications of each SCP node where LIDB resides. This
                  includes 9-track and 8mm tapes as well as other site-specific
                  limitations. SWBT shall provide LSP with all magnetic tape
                  hardware requirements upon request. LSP shall create the
                  magnetic tapes its submits for input into LIDB and LVAS over
                  the tape load interface.

         (D)      SWBT shall input information provided by LSP into LIDB for the
                  NPA-NXXs and/or NPA-RAOs set forth in Exhibit I, EXCHANGES TO
                  BE ADMINISTERED, attached hereto and made a part hereof. LSP
                  shall provide all information needed by SWBT to support the
                  services being requested. This information may include, but is
                  not limited to, Calling Card Service information, Toll Bill
                  Exception information (such as restrictions on collect and
                  third number billing), class of service information,
                  originating line number



<PAGE>   118
                                                                 APPENDIX LIDB
                                                                       PAGE 11



                  screening information, ZIP code information, and calling name
                  information.

         (E)      LSP shall furnish, prior to the initial LVAS load, and as
                  requested by SWBT thereafter, the following forecast data:

                  - the number of working lines per account group 
                  - the number of working line numbers to be established 
                  - the average number of monthly changes to these records 
                  - the number of busy hour queries, by query type 
                  - the number of annual queries by query type

                  If SWBT, at its discretion, determines that it lacks adequate
                  storage, or processing capability, prior to the initial
                  loading of LSP information, SWBT shall notify LSP of its
                  intent to not provide to LSP the Services under this Appendix
                  and this Appendix will be void.

         (F)      LSP shall furnish all line records and group records in a
                  format required by SWBT to establish records in LIDB for all
                  working line numbers, not just line numbers associated with
                  calling card PIN or Toll Billing Exceptions (TBE).

         (G)      LSP acknowledges that SWBT's LIDB is accessible by many
                  telecommunications companies and that these telecommunications
                  companies expect a high degree of accuracy in the response
                  information provided to their queries. LSP shall administer
                  its data in such a manner that SWBT's accuracy of response
                  information is not adversely impacted.

         (H)      LSP shall verify to SWBT the line information data residing in
                  LVAS by reviewing the listing of line information data
                  provided by SWBT's billing system audit file. LSP shall
                  provide to SWBT all additions, deletions, and corrections
                  resulting from its verification on, or before, the fourteenth
                  business day following its receipt of line information
                  verification reports produced by SWBT for audit processes.

         (I)      SWBT shall provide the functionality needed to perform certain
                  query/response functions on a call-by-call basis for the
                  line/billing records of LSP that reside in SWBT's LIDB. Those
                  query/response functions SWBT will perform are set forth in
                  the Exhibits.

         (J)      With respect to all matters covered by this Appendix, each
                  Party shall adopt and comply with SWBT standard operating
                  methods and procedures and shall observe the rules and
                  regulations which cover the administration of LVAS service and
                  the Sleuth System, as set forth in SWBT practices. The Parties
                  acknowledge that those practices may be changed by SWBT from
                  time to time.
<PAGE>   119
                                                                 APPENDIX LIDB
                                                                       Page 12




         (K)      Administration of the SCP on which LIDB resides, as well as
                  any system or query processing logic that applies to all data
                  resident on SWBT's LIDB is, and remains, the responsibility of
                  SWBT. LSP acknowledges that SWBT, in its role as system
                  administrator, may need to access any record in LIDB,
                  including any such records of LSP. SWBT shall limit such
                  access to those actions necessary to ensure the successful
                  operation and administration of SWBT's SCP and LIDB.

         (L)      LSP acknowledges that SWBT shall, in its sole discretion,
                  allow or negotiate any access to SWBT's LIDB. LSP does not
                  gain any ability, by virtue of this Appendix, to determine
                  which telecommunications companies are allowed to access
                  information in SWBT's LIDB. LSP acknowledges that when SWBT
                  allows a query originator to access SWBT data in SWBT's LIDB,
                  such query originators shall also have access to LSP's data
                  that is also stored in SWBT's LIDB.

         (M)      LSP acknowledges that SWBT does not have data screening
                  capability in LIDB. Data Screening is the ability of a LIDB
                  owner to deny complete or partial access to LIDB data or
                  processes.

4.       Billing

         Compensation to SWBT for data storage and administration service and
         Sleuth services shall be based upon the rates set forth in Exhibit II
         (Basis of Compensation), attached hereto and made a part hereof. These
         rates will apply for one (1) year from the service effective date for
         each exchange. After one (1) year, SWBT may change the rates upon
         seventy-five (75) days' notice. SWBT may first give such notice
         seventy-five days before the end of the first year.

         4.1      SWBT Responsibilities

                  (A)      SWBT shall determine, for billing purposes, the
                           number of access lines that are administered for each
                           NPA-NXX or NPA-RAO for which SWBT performs the
                           database administration function on behalf of LSP.
                           SWBT shall quantify access lines monthly.

                  (B)      SWBT shall provide, upon written request, such data
                           as is reasonably necessary to verify billing charges
                           for data base administration update functions. SWBT
                           shall provide this information in standard SWBT LVAS
                           report formats.

                  (C)      SWBT shall provide such data, as is reasonably
                           necessary, to enable the independent Billing
                           Information Systems (IBIS) billing statements to be
                           substantiated for query volumes of LSP line/billing
                           records that reside in


<PAGE>   120
                                                                 APPENDIX LIDB
                                                                       PAGE 13

                           SWBT's LIDB. SWBT shall provide this data to LSP in
                           standard Exchange Message Record (EMR) format.

         4.2      LSP Responsibilities

                  (A)      LSP shall pay SWBT the amounts billed for the
                           services rendered.

                  (B)      LSP shall bill the appropriate charges to end users,
                           on behalf of third parties who query LIDB and receive
                           a response verifying the end user's willingness to
                           accept the charges for the underlying call.

                  (C)      LSP shall provide to third parties, that query LIDB
                           and receive a response verifying an end user's
                           willingness to accept charges of services supported
                           by LIDB, all necessary billing information needed by
                           the third party to bill for the services provided.

         4.3      Compensation for Data Access

                  (A)      Subject to the limitations in (B) below, SWBT shall
                           compensate LSP for queries against the data LSP
                           stores in SWBT's LIDB. Queries by SWBT and LSP
                           against the data LSP stores in SWBT's LIDB shall be
                           included in the count of queries for which LSP will
                           be compensated. SWBT shall compensate LSP by paying a
                           percentage of the amounts SWBT billed, or would have
                           billed, for each query. LSP acknowledges that the
                           amount SWBT bills for LIDB queries against LSP's data
                           may differ by query type, by query originator, and/or
                           may change over time. The percentage SWBT will use to
                           calculate such credits is set forth in Exhibit II
                           (Basis of Compensation).

                  (B)      LSP acknowledges that SWBT's ability to provide such
                           credit is based upon SWBT's ability to identify
                           account ownership in LIDB. LSP acknowledges that LIDB
                           currently identifies account ownership only at the
                           level of the group record (i.e., NPA-NXX or NPA-RAO).
                           LSP further agrees that SWBT will not provide such
                           credit for LSP accounts that reside in group records
                           that also contain SWBT or other data owner accounts.
                           SWBT agrees to work with its LIDB and switch vendors
                           to attempt to develop the capabilities for SWBT to
                           identify, and record for billing, the service
                           provider of individual line/billing records. SWBT
                           shall provide LSP compensation if SWBT implements
                           such capabilities in its network.

5.       Liability

                  (A)      SWBT shall not be liable for any losses or damages
                           arising out of
<PAGE>   121
                                                                 APPENDIX LIDB
                                                                       Page 14

                           errors, interruptions, defects, failures, or
                           malfunction of LVAS, including any and all associated
                           equipment and data processing systems, except such
                           losses or damages caused by the sole negligence of
                           SWBT. Any losses or damages for which SWBT is held
                           liable under this Appendix shall in no event exceed
                           the amount of charges made for LVAS during the period
                           beginning at the time SWBT receives notice of the
                           error, interruption, defect, failure or malfunction
                           to the time service is restored.

                  (B)      SWBT shall not be liable for any losses or damages
                           arising out of SWBT's administration of Sleuth.

                  (C)      SWBT SHALL NOT BE LIABLE IN ANY EVENT FOR ANY
                           SPECIAL, INDIRECT, INCIDENTAL, CONSEQUENTIAL, OR
                           EXEMPLARY DAMAGES RESULTING FROM, OR ARISING OUT OF,
                           OR IN CONNECTION WITH, THIS AGREEMENT.

                  (D)      LSP agrees to release, indemnify, defend, and hold
                           harmless SWBT from any and all claims, demands, or
                           suits brought by a third party against SWBT, directly
                           or indirectly, arising out of SWBT's provision of
                           service under this Appendix. This provision shall not
                           apply to any losses, damages or other liability for
                           which SWBT is found liable as a result of its sole
                           negligence.

6.       Disclaimer of Warranties

         SWBT MAKES NO REPRESENTATIONS OR WARRANTIES, EXPRESS OR IMPLIED,
         INCLUDING BUT NOT LIMITED TO ANY WARRANTY AS TO MERCHANTABILITY OR
         FITNESS FOR INTENDED OR PARTICULAR PURPOSE WITH RESPECT TO LVAS
         SERVICE, LIDB OR THE SLEUTH SYSTEM. ADDITIONALLY, SOUTHWESTERN BELL
         ASSUMES NO RESPONSIBILITY WITH REGARD TO THE CORRECTNESS OF THE DATA
         SUPPLIED BY LSP WHEN THIS DATA IS ACCESSED AND USED BY A THIRD PARTY.



<PAGE>   122
                                                                 APPENDIX LIDB
                                                                       PAGE 15


                                  APPENDIX LIDB

                                    EXHIBIT I

                          EXCHANGES TO BE ADMINISTERED

SWBT shall provide service management system and other interface service
capabilities to LSP as set forth in this Appendix and attached Exhibit or
Exhibits for the following LSP exchanges:

       EXCHANGE NAME                     NPA NXX                   NPA-RAO

- ------------------------------      -----------------         -----------------

- ------------------------------      -----------------         -----------------

- ------------------------------      -----------------         -----------------

- ------------------------------      -----------------         -----------------

- ------------------------------      -----------------         -----------------

- ------------------------------      -----------------         -----------------

- ------------------------------      -----------------         -----------------

- ------------------------------      -----------------         -----------------

- ------------------------------      -----------------         -----------------

- ------------------------------      -----------------         -----------------

- ------------------------------      -----------------         -----------------

- ------------------------------      -----------------         -----------------

- ------------------------------      -----------------         -----------------

- ------------------------------      -----------------         -----------------

- ------------------------------      -----------------         -----------------

- ------------------------------      -----------------         -----------------

- ------------------------------      -----------------         -----------------

- ------------------------------      -----------------         -----------------

- ------------------------------      -----------------         -----------------

- ------------------------------      -----------------         -----------------

(Attach additional copies as needed)



<PAGE>   123




                                  APPENDIX LIDB

                                   EXHIBIT II

                              BASIS OF COMPENSATION

1.       COMPENSATION:

All rates and charges contained in this section are applicable in all regulatory
jurisdictions.

2.       RATES AND CHARGES

             Manual Interface                          Rate Per Initial Load
                  (a) Initial Load
                      (1)  per initial load              $372.00
                      (2)  per 100 line records
                           loaded                        $ 55.00

                  (b) Ongoing Updates                  Rate Per Month
                      (1)  per month                     $ 51.00
                      (2)  per 100 line records
                           stored in LIDB                $  3.75


<PAGE>   124


                                  APPENDIX LIDB

                                   EXHIBIT III

         CALLING CARD AND BILLED NUMBER SCREENING VALIDATION

         (A)  SWBT shall provide the functionality needed to perform the
              following query/response functions, on a call-by-call basis, for
              the line/billing records residing in SWBT's LIDB to:

                  1.       Validate a 14-digit billing number where the first 10
                           digits are a telephone number or a special billing
                           number assigned and the last four digits (PIN) are a
                           security code assignment.

                  2.       Determine whether the billed line automatically
                           rejects, accepts, or requires verification of certain
                           calls billed as collect or third number.

                  3.       Determine whether the billed line is a public
                           telephone number using the Class of Service
                           information in the LIDB.

         B.   LSP shall bill the appropriate charges to end users, on behalf of
              third parties who query LIDB and receive a response validating the
              end user's willingness to accept the charges for the underlying
              call.

Approved and executed the ______________day of ___________________, 19__.

DIGITAL TELEPORT, INC. (MISSOURI)           SOUTHWESTERN BELL TELEPHONE COMPANY

By________________________________          By__________________________________

Title_____________________________          Title_______________________________

Date______________________________          Date________________________________



<PAGE>   125


                                  APPENDIX LIDB

                                   EXHIBIT IV

                                     SLEUTH

         (A)      SWBT shall provide LSP with an alert notification, by fax, or
                  another mutually agreed upon format, when SWBT's Sleuth system
                  indicates the probability of a fraud incidence. SWBT will use
                  the same criteria to determine fraud alerts for LSP as SWBT
                  uses for its own accounts.

         (B)      Sleuth alert messages have four levels of priority. These
                  levels are low, medium, high and urgent. Sleuth delivers alert
                  messages to a queue in the Sleuth DBAC in priority order.
                  Urgent alerts are prioritized first, followed by high, medium
                  and low alerts (in that order).

         (C)      SWBT's Sleuth investigators can access alerts only in the
                  order the alerts appear in the queue. Low alerts almost never
                  see investigator treatment. However, when Sleuth encounters a
                  number of low priority alerts on the same account, Sleuth may
                  upgrade the alert's status to a higher priority status.

         (D)      When a Sleuth investigator determines that an urgent, high, or
                  medium priority alert is for an LSP account, the Sleuth
                  investigator will print the alert for the queue and fax the
                  alert to the LSP. Sleuth alerts only identify potential
                  occurrences of fraud. The LSP receiving Sleuth alerts will
                  need to perform its own investigations to determine whether a
                  fraud situation actually exists. The LSP will also need to
                  determine what, it any action should it take as a result of a
                  Sleuth alert.

         (E)      SWBT's hours of operation for Sleuth are seven days a week,
                  twenty-four hours per day (7X24). LSP shall provide SWBT with
                  a contact name and fax number for SWBT to fax alerts from
                  SWBT's Sleuth DBAC.

         (F)      SWBT shall provide LSP with a Sleuth contact name and number,
                  including fax number, for LSP to contact the Sleuth DBAC.

         (G)      For each alert notification SWBT provides to LSP, LSP may
                  request a corresponding 30-day historical report of
                  ABS-related query processing. LSP may request up to three
                  reports per alert. The charge for each historical report is
                  set forth in Exhibit II (Basis of Compensation).



<PAGE>   126


Approved and executed the ___________________________day of ____________, 19__.

DIGITAL TELEPORT, INC. (MISSOURI)           SOUTHWESTERN BELL TELEPHONE COMPANY

By________________________________          By_________________________________

Title_____________________________          Title______________________________

Date______________________________          Date_______________________________



<PAGE>   127


                                  APPENDIX LIDB

                                    EXHIBIT V

                           CNAM SERVICE QUERY SERVICE

Upon receipt of the line/billing information from LSP, in a format acceptable to
SWBT, SWBT will provide the functionality needed to perform the following
query/response functions, on a call-by-call basis, for the line/billing records
residing in SWBT's LIDB to identify the name associated with the line record.

Calling Name records are limited to fifteen characters. LSP is responsible for
providing all name truncations and/or abbreviations needed to limit a calling
name to 15 characters. LSP is also responsible for ensuring that its calling
name data does not contain obscenities in English or other languages. Upon
receipt of Calling Name data, in a format acceptable to SWBT, SWBT will provide
the query/response functions, on a call-by-call basis, for the line/billing
records residing in SWBT's LIDB to identify the name associated with the line
record.

CNAM Service Query is SWBT's service that allows customers to query SWBT's LIDB
for calling name information. Calling Name information means a
telecommunications company's records of all its subscribers' names associated
with one or more ten-digit telephone numbers assigned to the end user.

Approved and executed the ________________________day of _______________, 19__.

DIGITAL TELEPORT, INC. (MISSOURI)           SOUTHWESTERN BELL TELEPHONE COMPANY

By________________________________          By__________________________________

Title_____________________________          Title_______________________________

Date______________________________          Date________________________________



<PAGE>   128


                                  APPENDIX LIDB

                                   EXHIBIT VI

                    SINGLE NUMBER SERVICE (SNS) QUERY SERVICE

Upon receipt of the line/billing information from LSP, in a format acceptable to
SWBT, SWBT shall provide the functionality needed to perform the query/response
functions, on a call-by-call basis, for the line/billing records residing in
SWBT's LIDB to identify the ZIP code associated with the line record.

Approved and executed the _________________________day of _____________, 19___.

DIGITAL TELEPORT, INC. (MISSOURI)           SOUTHWESTERN BELL TELEPHONE COMPANY

By________________________________          By__________________________________

Title_____________________________          Title_______________________________

Date______________________________          Date________________________________



<PAGE>   129


                                  APPENDIX LIDB

                                   EXHIBIT VII

                 ORIGINATING LINE NUMBER SCREENING (OLNS) QUERY

Upon receipt of the line/billing information for LSP, in a format acceptable to
SWBT, SWBT shall provide the functionality needed to perform the query/response
functions, on a call-by-call basis, for the line/billing records residing in
SWBT's LIDB to identify the originating line screening requirements of the line
record.

LSP shall ensure that its OLNS data complies with the definitions and record
formats set forth in GR-1149-CORE and GR-446-CORE.

Approved and executed the ___________________day of ___________________, 19___.

DIGITAL TELEPORT, INC. (MISSOURI)            SOUTHWESTERN BELL TELEPHONE COMPANY

By________________________________           By_________________________________

Title_____________________________           Title______________________________

Date______________________________           Date_______________________________





<PAGE>   130


                                                             APPENDIX LIDB-V
                                                               PAGE 2 OF 14

                        APPENDIX LIDB VALIDATION SERVICE

         WHEREAS, the Parties are interested in purchasing each other's LIDB
Validation Service (or equivalent service);

         In consideration of the mutual promises contained herein, SWBT and LSP
agree as follows.

    I.   DEFINITIONS

         A.       A-links means a diverse pair of facilities connecting local
                  end office switching centers with Signaling Transfer Points.

         B.       Alternate Billing Service (ABS) means a service that allows
                  end users to bill calls to accounts that may not be associated
                  with the originating line. There are three types of ABS calls:
                  calling card, collect, and third number billed calls.

         C.       Billed Number Screening (BNS) means a validation of toll
                  billing exception (TBE) data and performance of public
                  telephone checks i.e., determining if a billed line is a
                  public (including those classified as semi-public) telephone
                  number.

         D.       Calling Card Service (CCS) means a service that enables a
                  calling customer to bill a telephone call to a calling card
                  number with or without the help of an operator.

         E.       Common Channel Signaling (CCS) Network means an out-of-band,
                  packet-switched, signaling network used to transport
                  supervision signals, control signals, and data messages.
                  Validation Queries and Response messages are transported
                  across the CCS network.

         F.       Data Base means an integrated collection of related data. In
                  the case of the LIDB, the data base is the line number and
                  related line information.

         G.       Data Owner means telecommunications companies that administer
                  their own validation data in a party's LIDB or LIDB-like
                  database.

         H.       Line Information Data Base (LIDB) means an ANSI SS7
                  call-related database system. LIDB functions as a centralized
                  repository for data storage and retrieval. SWBT's LIDB
                  supports validation of ABS calls as well as certain other
                  services.

         I.       Line Record means information in LIDB that is specific to a
                  single telephone number or special billing number.
<PAGE>   131
                                                             APPENDIX LIDB-V
                                                               PAGE 3 OF 14




         J.       Nonrecurring charges are one-time charges that apply for a
                  specific work activity (i.e., installation or change to an
                  existing service). Nonrecurring charges are applicable for the
                  establishment of LIDB Validation Service, service
                  rearrangements, and service order activity.

         K.       Originating Point Code (OPC) means a code assigned to identify
                  LSP's operator service system location(s).

         L.       Personal Identification Number (PIN) means a confidential
                  four-digit code number provided to a calling card customer to
                  prevent unauthorized use of his/her calling card number. The
                  PIN is stored in LIDB for those line numbers that have an
                  associated calling card.

         M.       Query means a message in American National Standards
                  Institute's (ANSI) standard SS7 signaling protocol which
                  represents a request to a LIDB or LIDB-like database for
                  Validation information.

         N.       Query Rate applies to each Validation Query that is received
                  at SWBT's LIDB for the validation of calling card and toll
                  billing exception data and performance of public telephone
                  checks; i.e., determining if a billed line is a public
                  (including those classified as semi public) telephone number.

         O.       Query Transport Rate applies to each Validation Query
                  transported from SWBT's STP to the SCP where LIDB resides and
                  back. SWBT and LSP shall list their STP locations in the
                  National Exchange Carrier Association, Inc. Tariff FCC No. 4.

         P.       Response means an SS7 message which, when appropriately
                  interpreted, represents an answer to a Query.

         Q.       Service Order Charge is a nonrecurring charge that applies,
                  per service order form, that specifies the LSP's originating
                  point codes (OPCs) of the LSP's designated operator service
                  systems sending the Validation Query or Queries.

         R.       Service Control Point (SCP) is a CCS network node where
                  Validation information resides.

         S.       Service Point (SP) means a CCS network interface element
                  capable of initiating and/or terminating SS7 messages from an
                  end office.

         T.       Service Rearrangements are changes to existing services which
                  do not result in changes to previously established OPCs.

         U.       Service Switching Point (SSP) means the software capability
                  within a switching point that provides the SP with SS7 message
                  preparation/interpretation capability plus SS7
                  transmission/reception access ability.



<PAGE>   132
                                                             APPENDIX LIDB-V
                                                               PAGE 4 OF 14




         V.       Signaling System 7 (SS7) means the signaling protocol used by
                  the CCS network.

         W.       Signaling Transfer Point (STP) is the point where a Party
                  interconnects with a CCS/SS7 network. In order to connect to
                  SWBT's SS7 network, LSP or a third party initiating LSP's
                  Validation Queries must connect with an SWBT STP in order to
                  connect to SWBT's SCP.

         X.       Special Billing Number means line records in LIDB that are
                  based on an NPA-RAO numbering format. NPA-RAO numbering
                  formats are similar to NPA-NXX formats except that the fourth
                  digit of an NPA-RAO line record is either a zero (0) or a one
                  (1).

         Y.       Toll Billing Exception (TBE) Service means a service that
                  allows end users to restrict third number billing or collect
                  calls to their lines.

         Z.       Validation information means Data Owners' records of all their
                  Calling Card Service and Toll Billing Exception Service.

    II.  DESCRIPTION OF SERVICE

         A.       SWBT shall provide LSP access to Validation information
                  whenever LSP initiates a query from an SSP for Validation
                  information available in SWBT's LIDB.

         B.       All LSP Queries to SWBT's LIDB shall use a translations type
                  of 253 and a subsystem number in the calling party address
                  field that is mutually agreed upon by the Parties. LSP
                  acknowledges that such subsystem number and translation type
                  values are necessary for SWBT to properly process Validation
                  Queries to its LIDB.

         C.       LSP warrants SWBT that LSP shall send Queries conforming to
                  the ANSI approved standards for SS7 protocol and pursuant to
                  the specification standards documents identified in Exhibit A
                  attached hereto and incorporated by reference. Both Parties
                  acknowledge that transmission in said protocol is necessary
                  for each party to provision Validation Service (or the
                  equivalent thereof). Both Parties warrant that they shall send
                  SS7 Messages that comply with ANSI approved standards for SS7
                  protocol and pursuant to the specification standards documents
                  identified in Exhibit A. Each Party reserves the right to
                  modify its network pursuant to other specifications standards,
                  which may include Bellcore Specifications defining specific
                  service applications, message types and formats, that may
                  become necessary to meet the prevailing demands within the
                  U.S. telecommunications industry. All such changes shall be
                  announced a minimum of one hundred eighty (180) days in
                  advance of implementation through industry


<PAGE>   133
                                                             APPENDIX LIDB-V
                                                               PAGE 5 OF 14


                  standard procedures. Each Party will work cooperatively to
                  coordinate any necessary changes.

         D.       LSP acknowledges that CCS/SS7 network overload due to
                  extraordinary volumes of Queries and/or other SS7 network
                  messages can and will have a detrimental effect on the
                  performance of SWBT's CCS/SS7 network. LSP further agrees that
                  SWBT, in its sole discretion, shall employ certain automatic
                  and/or manual overload controls within SWBT's CCS/SS7 network
                  to guard against these detrimental effects. SWBT shall report
                  to LSP any instances where overload controls are invoked due
                  to LSP's CCS/SS7 network and LSP agrees in such cases to take
                  immediate corrective actions as are necessary to cure the
                  conditions causing the overload situation.

         E.       Prior to SWBT initiating service under this Appendix, LSP
                  shall provide an initial forecast of busy hour Query volumes.
                  If, prior to the establishment of a mutually agreeable service
                  effective date, in writing, SWBT, at its sole discretion,
                  determines that it lacks adequate processing capability to
                  provide Validation Service to LSP, SWBT shall notify LSP of
                  SWBT's intent not to provide the services under this Appendix
                  and this Appendix will be void and have no further effect.

         F.       LSP shall update its busy hour forecast for each upcoming
                  calendar year (January - December) by October 1 of the
                  preceding year. LSP shall provide such updates each year for
                  the first three (3) years of this Appendix.

         G.       SWBT will perform testing of the LIDB Validation Service in
                  conjunction with CCS/SS7 Interconnection Service as outlined
                  in Bellcore Technical References TR-NWT-000954, TR-TSV-000905,
                  and TP 76638.

         H.       SWBT supports the performance standards as defined in Section
                  7 of TR- TSV-000905. The overall end-to-end CCS/SS7 network
                  objective is less than ten minutes unavailability per year
                  from any Signal Point (SP) to any other SP. The performance
                  objective for any single SP, including a Service Control Point
                  (SCP), is less than three minutes unavailability per year. The
                  combined link set from the SCP to the Signal Transfer Point
                  (STP) has a performance objective of less than two minutes
                  unavailability per year.

         I.       SWBT's LIDB Validation Service system downtime will be less
                  than twelve hours per year. The response time for a Query,
                  from switch transmission to reception, should not exceed one
                  second for ninety-nine (99) percent of all Queries.

         J.       SWBT shall administer its LIDB to provide acceptable service
                  levels to all customers of SWBT's LIDB Validation Service.
                  During periods of LIDB system congestion, SWBT will utilize an
                  automatic code gapping procedure to control




<PAGE>   134
                                                             APPENDIX LIDB-V
                                                               PAGE 6 OF 14



                  such congestion. The automatic code gapping procedure will
                  tell LSP's switch the gap (how long LSP's switch should wait
                  before sending another query) and the duration (how long the
                  switch should continue to perform gapping). For example,
                  during an overload condition, the automatic code gapping
                  procedure will tell SWBT's LIDB when to begin to drop one out
                  of three queries received. This code gapping procedure will be
                  applied uniformly to all users of SWBT's LIDB Validation
                  Service. SWBT maintains the right to invoke manual
                  intervention of the automatic code gapping procedure to
                  preserve the integrity of its network.

         K.       LSP agrees that network overload due to extraordinary volumes
                  of Queries and/or other SS7 network messages can and will have
                  a detrimental effect on the performance of SWBT's network and
                  its LIDB Validation Service. LSP further agrees to take
                  immediate, corrective actions as are necessary to cure the
                  conditions causing the overload situation.

         L.       All access by LSP to SWBT's LIDB shall occur through SWBT's
                  regional STP as designated by SWBT.

         M.       SWBT's LIDB shall contain a record for every SWBT working line
                  number and Special Billing Number served by SWBT. Other
                  telecommunications companies, including LSP, may also store
                  their data in SWBT's LIDB. SWBT shall request such
                  telecommunications companies to also provide this data as
                  well.

         N.       SWBT shall update the LIDB information; e.g., add, delete, and
                  modify customer accounts as customers move, become delinquent
                  on their account, or order new service, on a daily basis. SWBT
                  shall request other Data Owners to provide such updates in
                  like time.

         O.       SWBT has procedures in place to deactivate billing validation
                  data in the event that such data is being used fraudulently or
                  in the event end users exceed SWBT-defined limits on toll
                  charges. SWBT shall update SWBT-issued calling cards that
                  SWBT suspects of being fraudulently used or exceeding
                  SWBT-defined toll limits seven (7) days a week, 24 hours a
                  day.

         P.       SWBT's LIDB shall receive and respond to all Calling Card
                  Service and Billed Number Screening queries, including SWBT's
                  and LSP's queries, as defined in Bellcore publications
                  TR-NWT-000246, FR-NWT-000271, TR-TSV-000905, TR-NWT-000954 and
                  SWBT's publication TP 6638. These procedures shall be applied
                  uniformly to all users of SWBT's LIDB Validation Service.

         Q.       SWBT's LIDB Validation Service shall provide the following
                  functions on a per query basis:
<PAGE>   135
                                                                 APPENDIX LIDB-V
                                                                    PAGE 7 OF 14


                  -        validation of a telecommunications calling card
                           account number stored in LIDB;

                  -        determination of whether the billed line has decided
                           in advance to reject certain calls billed as collect
                           or to a third number; and

                  -        determination of billed line as a public (including
                           those classified as semi public) or nonworking
                           telephone number.

         R.       SWBT provides LIDB Validation Service as set form in this
                  Appendix only as such service is used for LSP's activities as
                  a local service provider in SWBT's traditional serving areas
                  in the states of Arkansas, Kansas, Missouri, Oklahoma, and
                  Texas. SWBT provides a LIDB Validation Service for
                  interexchange carriers, operator service providers, and other
                  telecommunications companies under effective tariffs. LSP
                  agrees that any other use of SWBT's LIDB for the provision of
                  LIDB Validation Service by LSP, including, but not limited to,
                  when LSP acts as an LSP outside of SWBT's traditional serving
                  areas in the states of Arkansas, Kansas, Missouri, Oklahoma,
                  and Texas, and/or acts as an operator service provider to
                  other LSPs, local exchange companies, or any other
                  telecommunications company, and/or acts as an interexchange
                  carrier, will be pursuant to the terms, conditions, rates, and
                  charges of SWBT's effective tariffs, as revised, for LIDB
                  Validation Service.

    III. PRICE AND PAYMENT

         A.       LSP shall pay SWBT a Validation Query rate and a Query
                  Transport Rate for each Query initiated into SWBT's LIDB.
                  These rates are set forth in Exhibit I (Basis of
                  Compensation), which is attached hereto and incorporated by
                  reference.

         B.       LSP shall pay a Nonrecurring Charge for each request for
                  establishment or change of existing LIDB Validation Service.
                  The LIDB Validation Service Establishment Charge applies per
                  originating point code per request and is set forth in Exhibit
                  I (Basis of Compensation).

         C.       LSP shall pay a Service Order Charge for each request for
                  service order activity. The Service Order Charge is set forth
                  in Exhibit I (Basis of Compensation).

         D.       Payment to SWBT for LIDB Validation Service shall be based
                  upon the rates set forth in Exhibit I (Basis of Compensation),
                  attached hereto and made a part thereof. These rates and
                  charges will apply for one (1) year from the service effective
                  date for each exchange. After one (1) year, SWBT may change
                  the rates upon sixty (60) days' notice. SWBT may first give
                  such notice sixty (60) days before the end of the first year.
<PAGE>   136
                                                             APPENDIX LIDB-V
                                                               PAGE 8 OF 14



         E.       SWBT shall record usage information for LSP's Validation
                  Queries terminating to SWBT's LIDB. SWBT shall use its SCPs as
                  the source of usage data. SWBT shall aggregate usage by the
                  point code of the Query-originating SSP.

         F.       Based upon the data identified in SubSection 3.E of this
                  Appendix, SWBT shall bill LSP for its Validation Queries on a
                  monthly basis. The bill will be issued by the fifteenth day of
                  each month, and LSP shall pay the bill within thirty (30) days
                  of the bill issue date. LSP shall pay late payment charges as
                  applicable and as described in SWBT's Tariff FCC No. 73.

         G.       SWBT shall provide sufficient information with the bill to
                  enable LSP to determine how the billed amount was calculated.

         H.       Depending on LSP's choice of method for transporting its
                  Queries and Responses, LSP may be required to purchase certain
                  other services, especially services that may be provided
                  pursuant to effective tariffs. In this event the prices,
                  terms, conditions, and billing for such services will be
                  specified in the applicable tariff(s) and this Appendix shall
                  not be construed to circumvent the prices, terms, conditions,
                  or billing as specified in the applicable tariff(s).

         I.       If there is a dispute associated with a monthly bill, the
                  disputing Party shall notify the other in writing within
                  ninety (90) calendar days of the date of said monthly bill or
                  the dispute shall be waived. Each Party agrees that any amount
                  of any monthly bill that that Party disputes will be paid by
                  that Party according to the terms of Subsection III.F. above.
                  Any adjustments relating to a disputed amount shall be
                  reflected on the next monthly bill issued after resolution.
                  Any credit issued upon resolution of any dispute shall bear
                  interest at the rate specified in Subsection III.F. above,
                  payable on and as of the date the credit is issued. Parties
                  shall work cooperatively and use their best efforts to resolve
                  any disputes as quickly as possible.

         J.       SWBT shall treat changes in previously established OPCs as a
                  discontinuance of the existing LIDB Validation Service and
                  establishment of a new LIDB Validation Service and all
                  applicable Nonrecurring Charges shall be paid by LSP.

         K.       If LSP acts as a telecommunications company other than a local
                  service provider, or if LSP acts as a local service provider
                  in areas outside of SWBT's traditional service areas in the
                  states of Arkansas, Kansas, Missouri, Oklahoma, and Texas, LSP
                  shall designate those point codes from which it originates
                  LIDB Validation Service Queries as an LSP acting as a local
                  service provider within SWBT's traditional service areas in
                  the states of Arkansas, Kansas, Missouri, Oklahoma, and Texas
                  from those point codes which originate LIDB Validation Service
                  Queries for all other aspects of its business. If LSP uses the
                  same OPC to originate Queries for its operations as an LSP
                  within SWBT's traditional service areas in the states of
                  Arkansas, Kansas, Missouri, Oklahoma, and Texas as it does
<PAGE>   137
                                                             APPENDIX LIDB-V
                                                               PAGE 9 OF 14



                  for any other aspect of its business, then LSP shall provide
                  SWBT with a percentage of use factor that SWBT can use to
                  apportion LSP's traffic between SWBT's terms, conditions,
                  rates and charges under this Appendix and the terms,
                  conditions, rates and charges under SWBT's appropriate and
                  effective tariff. LSP shall provide this factor in a whole
                  number between one (1) and one hundred (100) to indicate the
                  percentage of LIDB Validation Services LSP originates as an
                  LSP acting as a local service provider within SWBT's
                  traditional service area in the states of Arkansas, Kansas,
                  Missouri, Oklahoma, and Texas. A percentage of use factor of 1
                  (one) indicates that one percent of LSP's LIDB Validation
                  Service Queries originate as an LSP acting as a local service
                  provider within SWBT's traditional service areas in the states
                  of Arkansas, Kansas, Missouri, Oklahoma, and Texas. A
                  percentage of use factor of one hundred (100) indicates that
                  one hundred percent of LSP's LIDB Validation Service Queries
                  is from LSP acting as a local service provider within SWBT's
                  traditional service area in the states of Arkansas, Kansas,
                  Missouri, Oklahoma, and Texas.

         L.       Such percentage of use factors will be provided by LSP on the
                  LIDB Access Service Order Form used to establish the service.
                  All updates to this factor will provided via a letter. If LSP
                  does not furnish a percentage of usage factor, LSP agrees that
                  SWBT will apply a percentage of usage factor of one percent
                  (1%).

         M.       LSP shall update its percentage of use factors on a quarterly
                  basis. Effective on the first of January, April, July and
                  October of each year, LSP shall forward to SWBT, to be
                  received no later than fifteen (15) business days after the
                  first of each such month, a revised report showing the
                  percentage of use factors for the past three months ending the
                  last day of December, March, June, and September,
                  respectively, for each OPC from which LSP originates LIDB
                  Validation Service Queries. Both Parties agree that the
                  revised report will serve as the basis for the next three
                  months billing. Both Parties agree that no prorating or
                  backbilling will be done based on the report. SWBT shall use
                  the revised report to apportion usage rates, monthly rates,
                  and nonrecurring charges until a revised report is received
                  from LSP as set forth and agreed to herein.

         N.       SWBT may, upon written request by Certified U.S. mail (return
                  receipt requested), require LSP to provide call detail records
                  which will be audited to substantiate the projected percentage
                  of use factor provided by LSP. SWBT may request this detailed
                  information annually. If the audit results represent what SWBT
                  considers to be a substantial deviation from LSP's previously
                  reported percentage of use for the period upon which the audit
                  was based, and that deviation is not due to seasonal changes
                  or other identifiable reasons, LSP agrees to allow SWBT to
                  request such call detail records more than once annually. Both
                  parties agree that SWBT may make the call detail records
                  available to an independent auditor or to SWBT audit employees
                  within thirty (30) days of the request at an agreed upon
                  location during normal business hours.
<PAGE>   138
                                                                 APPENDIX LIDB-V
                                                                   PAGE 10 OF 14



         O.       If LSP fails to comply with SWBT's request for auditable call
                  detail records, SWBT may refuse additional applications for
                  service and/or refuse to complete any pending orders for
                  service for a period of thirty (30) days. If at the conclusion
                  of thirty (30) days, LSP still does not comply with this
                  request, SWBT may apply an assumed percentage of use factor of
                  one percent (1%).

    IV.  OWNERSHIP OF VALIDATION INFORMATION

         A.       Telecommunications companies depositing information in SWBT's
                  LIDB may retain full and complete ownership and control over
                  such information. LSP obtains no ownership interest by virtue
                  of this Appendix.

         B.       Unless expressly authorized in writing by parties, LIDB
                  Validation Service is not to be used for purposes other than
                  those described in this Appendix. LSP may use LIDB Validation
                  Service for those functions only on a call-by-call basis. Data
                  accessed on LIDB may not be stored by LSP elsewhere for future
                  use.

         C.       Proprietary information residing in SWBT's LIDB is protected
                  from unauthorized access and LSP may not store such
                  information in any table or database for any reason. All
                  information related to alternate billing service is
                  proprietary. Examples of proprietary information are as
                  follows:

                  - Billed (Line/Regional Accounting Office (RAO)) Number 
                  - PIN Number(s) 
                  - Billed Number Screening (BNS) indicators 
                  - Class of Service (also referred to as Service or Equipment)
                  - Reports on LIDB usage 
                  - Information related to billing forLIDB usage 
                  - LIDB usage statistics.

         D.       LSP shall not copy, store, maintain, or create any table or
                  database of any kind after initiating, and based upon a
                  Response to, a Validation Query to SWBT's LIDB.

         E.       If LSP acts on behalf of other carriers, LSP shall prohibit
                  its Query- originating carrier customers from copying,
                  storing, maintaining, or creating any table or database of any
                  kind from any Response provided by SWBT after a Validation
                  Query to SWBT's LIDB.

         F.       SWBT will share end user information, pertinent to fraud
                  investigation, with LSP when validation queries for the
                  specific end user reaches SWBT's established fraud threshold
                  level. This fraud threshold level will be applied uniformly to
                  all end user information in SWBT's LIDB.



<PAGE>   139
                                                             APPENDIX LIDB-V
                                                               PAGE 11 OF 14





    V.   TERM AND TERMINATION

         A.       This Appendix shall become effective pursuant to Section XXVII
                  (Effective Date) of the Statement and shall continue for one
                  (1) year from the effective date of implementation of LIDB
                  Validation Service. Thereafter, this Appendix shall remain in
                  effect unless terminated by either party upon written notice
                  given sixty (60) days in advance of the termination date.

         B.       If a Party materially fails to perform its obligations under
                  this Appendix, the other Party, after notifying the
                  non-performing Party of the failure to perform and allowing
                  that Party thirty (30) days after receipt of the notice to
                  cure such failure, may cancel this Appendix immediately upon
                  written notice.

         C.       Notwithstanding anything to the contrary in this Appendix, if
                  legal or regulatory decisions or rules compel SWBT or LSP to
                  terminate the Appendix, SWBT and LSP shall have no liability
                  to the other in connection with such termination.

    VI   LIMITATION OF LIABILITY

         A.       A Party's sole and exclusive remedies against the other Party
                  for injury, loss or damage caused by or arising from anything
                  said, omitted or done in connection with this Appendix
                  regardless of the form of action, whither in contract or in
                  tort (including negligence or strict liability) shall be the
                  amount of actual direct damages and in no event shall exceed
                  the amount paid for LIDB Validation Service.

         B.       The remedies in Section VI.A. of this Appendix shall be
                  exclusive of all other remedies against a Party, its
                  affiliates, subsidiaries or parent corporation, (including
                  their directors, officers, employees or agents).

         C.       In no event shall a Party have any liability for system outage
                  or inaccessibility, or for losses arising from the
                  unauthorized use of the data by LIDB Validation Service Query
                  purchasers.

         D.       SWBT is furnishing access to its LIDB or LIDB-like database in
                  order to facilitate LSP's provision of Alternate Billing
                  Service to its end users, but not to insure against the risk
                  of completion of an ABS-related call. While SWBT agrees to
                  make every reasonable attempt to provide accurate Validation
                  information, the Parties acknowledge that Validation
                  information is the product of routine business service order
                  activity and fraud investigations. LSP acknowledges that SWBT
                  can furnish Validation information only as accurate and
                  current as the information has been provided to SWBT for
                  inclusion in its LIDB. Therefore, SWBT, in addition to the
                  limitations of liability set forth, is not liable for
                  inaccuracies in the Validation information records provided to
                  LSP except such inaccuracies caused by SWBT's willful or
                  wanton misconduct or gross negligence.
<PAGE>   140
                                                                 APPENDIX LIDB-V
                                                                   PAGE 12 OF 14


         E.       IN NO EVENT SHALL SWBT, ITS AFFILIATES, SUBSIDIARIES OR PARENT
                  CORPORATION, (INCLUDING ITS DIRECTORS, OFFICERS, EMPLOYEES OR
                  AGENTS) HAVE ANY LIABILITY WHATSOEVER TO OR THROUGH LSP FOR
                  ANY INDIRECT, SPECIAL, OR CONSEQUENTIAL DAMAGES, INCLUDING,
                  BUT NOT LIMITED TO LOSS OF ANTICIPATED PROFITS OR REVENUE OR
                  OTHER ECONOMIC LOSS IN CONNECTION WITH OR ARISING FROM
                  ANYTHING SAID, OMITTED OR DONE HEREUNDER, EVEN IF LSP HAS BEEN
                  ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.

    VII. COMMUNICATION AND NOTICES

         A.       Ordering and billing inquiries for the services described
                  herein from SWBT shall be directed to the Local Service
                  Provider Service Center (LSPSC). Ordering shall be done
                  through the LSPSC using the form attached hereto as Exhibit
                  III.

   VIII. CONFIDENTIALITY

         A.       Identification. SWBT and LSP recognize and acknowledge that,
                  in connection with the services to be provided hereunder,
                  either may disclose to the other party proprietary or
                  confidential customer, technical or business information in
                  written graphic, oral or other tangible or intangible forms.
                  In order for such information to be considered "Proprietary
                  Information" under this Appendix, such information must be
                  marked "Confidential" or "Proprietary" or bear a marking of
                  similar import. Orally disclosed information shall be
                  considered Proprietary Information only if contemporaneously
                  identified as such and reduced to writing and delivered to the
                  other party with a statement or marking of confidentiality
                  within twenty (20) calendar days after oral disclosure.

         B.       Nondisclosure. Subject to Sections 8C through 8F, the Party
                  (the_ "Receiving Party") that receives Proprietary Information
                  from the other Party (the "Disclosing Party") agrees:

                  (1)      That all Proprietary Information shall be and shall
                           remain the exclusive property of the Disclosing
                           Party.

                  (2)      To limit access to such Proprietary Information to
                           authorized employees and other individuals who have a
                           need to know the Proprietary Information in order to
                           perform its obligations under this Appendix.

                  (3)      To keep such Proprietary Information confidential and
                           to use the same level of care to prevent disclosure
                           or unauthorized use of the received Proprietary
                           Information as it exercises in protecting its own
                           Proprietary Information of a similar nature.
<PAGE>   141
                                                             APPENDIX LIDB-V
                                                               PAGE 13 OF 14



                  (4)      For a period of three (3) years following any
                           disclosure, not to copy or publish or disclose such
                           Proprietary Information to others or authorize anyone
                           else to copy or publish or disclose such Proprietary
                           Information to others without the prior written
                           approval of the Disclosing Party.

                  (5)      To use such Proprietary Information only for purposes
                           of performing its obligations under this Appendix and
                           for other purposes only upon such terms as may be
                           agreed upon between the Parties in writing.

         C.       Required Disclosures. The Receiving Party agrees to give
                  notice to the Disclosing Party of any demand to disclose or
                  provide Proprietary Information of the Disclosing Party to
                  another person, under lawful process, prior to disclosing or
                  furnishing such Proprietary Information. Further, the
                  Receiving Party agrees to reasonably cooperate if the
                  Disclosing Party deems it necessary to seek protective
                  arrangements. The Receiving Party may disclose or provide
                  Proprietary Information of the Disclosing Party to meet the
                  requirements of a court, regulatory body or government agency
                  having jurisdiction over the Party; provided, however, that
                  the Receiving Party shall notify the Disclosing Party so as to
                  give the Disclosing Party a reasonable opportunity to object
                  to such disclosure. The Disclosing Party may not unreasonably
                  withhold approval of protective arrangements provided by any
                  such court, regulatory body or government agency. Nothing
                  herein requires either Party to support the position of any
                  person or entity as to whether any particular Proprietary
                  Information is proprietary under applicable law or this
                  Section 8.

         D.       Exceptions. Notwithstanding anything to the contrary contained
                  in this Appendix, the Proprietary Information described herein
                  shall not be deemed confidential or proprietary and the
                  Receiving Party shall have no obligation to prevent disclosure
                  of such Proprietary Information if such Proprietary
                  Information:

                  (1)      is already known to the Receiving Party;

                  (2)      is or becomes publicly known, through publication,
                           inspection of the product, or otherwise, and through
                           no wrongful act of the Receiving Party;

                  (3)      is received from a third party without similar
                           restriction and without breach of this Section 8;

                  (4)      is independently developed, produced or generated by
                           the Receiving Party;

                  (5)      is furnished to a third party by the Disclosing Party
                           without a similar restriction on the third party's
                           rights; or
<PAGE>   142
                                                             APPENDIX LIDB-V
                                                               PAGE 14 OF 14



                  (6)      is approved for release by written authorization of
                           the Disclosing Party, but only to the extent of such
                           authorization.

         E.       Permitted Uses. SWBT shall be permitted to use Proprietary
                  Information obtained through recording the volume of LSP
                  Queries for the purposes of: (a) estimation of facilities
                  usage for jurisdictional separations; (b) engineering and
                  network planning of facilities; and (c) measurement for
                  billing purposes.

         F.       Legal Requirements. Notwithstanding anything to the contrary
                  contained in this Agreement, a Party's ability to disclose
                  Proprietary Information or use disclosed Proprietary
                  Information is subject all applicable statures, decisions, and
                  regulatory rules concerning the disclosure and use of such
                  Proprietary Information which, by their express terms, mandate
                  a different handling of such information.

    9.   Mutuality

         To the extent that LSP stores its own Validation Information in a
         database, LSP agrees that Validation Information shall be available to
         SWBT on terms and conditions comparable to those contained in this
         Appendix. Such terms and conditions shall include, but not be limited
         to, making such Validation Information available on a platform
         technically similar to that employed by SWBT, and at a rate comparable
         to that charged by SWBT.

    10. Attached and incorporated herein are:

         Exhibit I - Basis of Compensation
         Exhibit II - Specifications and Standards
         Exhibit III - LIDB Access Service Order Form





<PAGE>   143
                                                     APPENDIX LIDB-V - EXHIBIT I
                                                                    PAGE  1 OF 1

                                 APPENDIX LIDB-V

                              BASIS OF COMPENSATION

1.       COMPENSATION:

         All rates and charges contained in this section are applicable in all
         regulatory jurisdictions.

2.  Rates and Charges

    A   LIDB Query                                        Rate Per Query

        1. Per LIDB Query Transport                       $.0045

        2. Per LIDB Validation Query                      $.026

           -        Billed Number Screening
           -        Calling Card Count

    B.  LIDB Nonrecurring Charge                          Nonrecurring Charge

        1. Per Originating Point Code (OPC)               $15.35

        2. Per LIDB Validation Service Form               $256.70



<PAGE>   144
                                                    APPENDIX LIDB-V - EXHIBIT II
                                                                    PAGE  1 OF 1

                                 APPENDIX LIDB-V

                          SPECIFICATIONS AND STANDARDS

Issuing Organization                                      Document Number

Bellcore                                                  TR-NWT-000246

Bellcore                                                  TR-NWT-000271

Bellcore                                                  TR-TSV-000905

Bellcore                                                  TR-NWT-000954

SWBT                                                      TP 76638




<PAGE>   145
SOUTHWESTERN BELL TELEPHONE COMPANY                                  EXHIBIT III
CUSTOMER PROVIDED FACTOR REPORTS                                  SEPTEMBER 1996
                                                                          PAGE 1
                                                
                                                

                   LIDB ACCESS VALIDATION SERVICES ORDER FORM


CUSTOMER NAME___________________________________________________________________

CARRIER CUSTOMER NAME ABBREVIATION______________________________
(CCNA - THREE ALPHA CHARACTERS)

CUSTOMER ADDRESS _______________________________________________________________


CUSTOMER BILLING NAME___________________________________________________________
(IF DIFFERENT THAN CUSTOMER NAME)

ACCESS CUSTOMER NAME ABBREVIATION_______________________________
(ACNA - THREE ALPHA CHARACTERS)

CUSTOMER BILLING ADDRESS
________________________________________________________________________________
(IF DIFFERENT THAN CUSTOMER ADDRESS)

________________________________________________________________________________
CITY, STATE, ZIP CODE

________________________________________________________________________________


CUSTOMER BILLING CONTACT NAME AND TELEPHONE NUMBER______________________________

                                                 (    )
________________________________________________________________________________

CREDIT INFORMATION:  TYPE OF OWNERSHIP _____
                  (S - SOLE OWNER; C - INCORP.; P - PARTNERSHIP)
IF INCORPORATED:
STATE WHERE INCORP._____________ DATE INCORP.________________

CHARTER NUMBER_______________________________________________

PRES. NAME_______________________________________________OFC. TEL. NO.  (  )


V.P. NAME________________________________________________OFC. TEL. NO.  (  )


SECT. NAME_______________________________________________OFC. TEL. NO.  (  )


TREA. NAME_______________________________________________OFC. TEL. NO.  (  )


IF PARTNERSHIP:
PARTNERS NAME____________________________________________OFC. TEL. NO.  (  )


PARTNERS NAME____________________________________________OFC. TEL. NO.  (  )


PARTNERS NAME____________________________________________OFC. TEL. NO.  (  )




<PAGE>   146
SOUTHWESTERN BELL TELEPHONE COMPANY                                  EXHIBIT III
CUSTOMER PROVIDED FACTOR REPORTS                                  SEPTEMBER 1996
                                                                          PAGE 2




PARTNERS NAME____________________________________________OFC. TEL. NO.  (  )

LETTER OF AGENCY DATED_________________SIGNATURE________________________________


SWBT ORDER NUMBER______________________

DESIRED DUE DATE_______________________FIRM DUE DATE____________________________

FOR NEW SERVICE, THE APPROXIMATE NUMBER OF NPA NXXs ____________________________

TYPE OF ACTIVITY_________(N - NEW OR ADD; C - CHANGE; D - DISCONNECT; S - SUPP)


BILLING ACCOUNT NUMBER (BAN)____________________________________________________

CUSTOMER ORDER CONTACT NAME, ADDRESS, ZIP CODE, AND TELEPHONE
NUMBER:

________________________________

________________________________
                       (     )
________________________________

CUSTOMER TECHNICAL CONTACT NAME AND TELEPHONE NUMBER: 
                                                      (   ) 
_______________________________________________________________________________

CPOC SVC. REP. CONTACT NAME AND TELEPHONE NUMBER:     
                                                      (   ) 
_______________________________________________________________________________


*SWBT CKR:___________________________________*TWO SIX
CODE:________________________________
         (SWBT ID OF CCS/SS7 INTERCONN. SVC.)

1.    _______________________
2.    _______________________
3.    _______________________
4.    _______________________

*THIS INFORMATION SHOULD BE OBTAINED BY THE LIDB CUSTOMER FROM THEIR CCS/SS7
INTERCONNECTION SERVICE PROVIDER.



<PAGE>   147
SOUTHWESTERN BELL TELEPHONE COMPANY                                  EXHIBIT III
CUSTOMER PROVIDED FACTOR REPORTS                                  SEPTEMBER 1996
                                                                          PAGE 3



LIDB VALIDATION SERVICE__________ CALLING NAME SERVICE_____

ORIGINATING LINE NUMBER SCREENING_____

 ACT.    ORIGINATING POINT              ACT.       ORIGINATING POINT
 TYPE    CODES:                         TYPE       CODES:
 ___     _________________              ____       __________________

 ___     _________________              ____       __________________

 ___     _________________              ____       __________________

 ___     _________________              ____       __________________

 ___     _________________              ____       __________________

 ___     _________________              ____       __________________

 ___     _________________              ____       __________________

 ___     _________________              ____       __________________

 ___     _________________              ____       __________________

 ___     _________________              ____       __________________

 ___     _________________              ____       __________________

 ___     _________________              ____       __________________

 ___     _________________              ____       __________________

 ___     _________________              ____       __________________

REMARKS_________________________________________________________________________

________________________________________________________________________________

________________________________________________________________________________

DATE AND TIME RECEIVED IN THE CPOC

<PAGE>   148
SOUTHWESTERN BELL TELEPHONE COMPANY                                  EXHIBIT III
CUSTOMER PROVIDED FACTOR REPORTS                                  SEPTEMBER 1996
                                                                          PAGE 4

- --------------------------------------------------------------------------------

LIDB VALIDATION SERVICE _________    CALLING NAME SERVICE __________

ORIGINATING LINE NUMBER SCREENING ___________

ACT.     ORIGINATING POINT              ACT.       ORIGINATING POINT
TYPE     CODES:                         TYPE       CODES:

 ___     _________________              ____       __________________

 ___     _________________              ____       __________________

 ___     _________________              ____       __________________

 ___     _________________              ____       __________________

 ___     _________________              ____       __________________

 ___     _________________              ____       __________________

 ___     _________________              ____       __________________

 ___     _________________              ____       __________________

 ___     _________________              ____       __________________

 ___     _________________              ____       __________________

 ___     _________________              ____       __________________

 ___     _________________              ____       __________________

 ___     _________________              ____       __________________

 ___     _________________              ____       __________________

REMARKS_________________________________________________________________________

________________________________________________________________________________

________________________________________________________________________________
DATE AND TIME RECEIVED IN THE CPOC



<PAGE>   149
SOUTHWESTERN BELL TELEPHONE COMPANY                                  EXHIBIT III
CUSTOMER PROVIDED FACTOR REPORTS                                  SEPTEMBER 1996
                                                                          PAGE 5
                    LIDB ACCESS VALIDATION SERVICE ORDER FORM

                                  INSTRUCTIONS

THE LIDB ACCESS VALIDATION SERVICE ORDER FORM CONSISTS OF FOUR PAGES.

PAGE 1 - ALL THE INFORMATION ON THIS PAGE IS FOR ADMINISTRATIVE USE IN
         ESTABLISHING THE LIDB BILLING ACCOUNT. ALL OF THE INFORMATION IS
         REQUIRED ON THE INITIAL ORDER. ORDERS SUBMITTED SUBSEQUENT TO THE
         ESTABLISHED ACCOUNT WILL REQUIRE ONLY THE CUSTOMER'S NAME AND ADDRESS.
         THE OTHER ENTRIES WILL BE REQUIRED ONLY IF THERE IS A CHANGE TO THE
         ORIGINAL INFORMATION.

PAGE 2 - ALL THE INFORMATION ON PAGE TWO IS FOR THE REQUESTED ACTIVITY.  THIS
         INFORMATION WILL ALWAYS BE REQUIRED.

1.       DESIRED DUE DATE/FIRM DUE DATE - APPROXIMATE NUMBER OF NPA NXXs

         ***DESIRED DUE DATE IS USED WHEN A FIRM DUE DATE HAS NOT BEEN
         COORDINATED WITH THE LIDB CUSTOMER PRIOR TO THE SUBMISSION OF THE ORDER
         FORM TO THE ICSC.

         THE LIDB CUSTOMER WILL ENTER THEIR DESIRED DATE FOR THEIR LIDB SERVICE
         TO BE ESTABLISHED AND THE APPROXIMATE NUMBER OF NPA NXXs ASSOCIATED
         WITH THE NEW SERVICE.

         IF THE ORDER IS FOR SUBSEQUENT ACTIVITY TO AN ESTABLISHED ACCOUNT, THE
         APPROXIMATE NUMBER OF NPA NXXs WILL NOT BE REQUIRED.

         ***FIRM DUE DATE IS USED WHEN THE CUSTOMER'S ACCOUNT MANAGER HAS
         COORDINATED WITH THE SNAC TO ESTABLISH THE DUE DATE PRIOR TO THE ORDER
         FORM BEING SENT TO THE CPOC.



<PAGE>   150
SOUTHWESTERN BELL TELEPHONE COMPANY                                  EXHIBIT III
CUSTOMER PROVIDED FACTOR REPORTS                                  SEPTEMBER 1996
                                                                          PAGE 6

PAGE 2 INSTRUCTIONS CONTINUED -

2.       TYPE OF ACTIVITY

         N - SHOULD BE ENTERED TO ESTABLISH A LIDB SERVICE CAN ALSO BE ENTERED
             TO ADD ADDITIONAL POINT CODES TO AN EXISTING SERVICE

         C - SHOULD BE ENTERED TO ADD POINT CODES TO OR DELETE POINT CODES FROM
             AN EXISTING SERVICE

         D - SHOULD BE ENTERED TO COMPLETELY DISCONNECT AN EXISTING SERVICE

         S - SHOULD BE ENTERED TO MAKE A CHANGE ON A CURRENT ORDER PRIOR TO
             THE COMPLETION DATE (i.e., CHANGE DUE DATE, CORRECT POINT CODE(S),
             ETC.)

3.       BILLING ACCOUNT NUMBER (BAN)

         THE SWBT BILLING ACCOUNT NUMBER OF THE VALIDATION SERVICE AND/OR THE
         CALLING NAME SERVICE

         IF THE ORDER IS FOR NEW SERVICE, THIS FIELD WILL BE BLANK

4.       CUSTOMER ORDER CONTACT...

         A CONTACT WITH THE CUSTOMER THAT THE CPOC CAN COORDINATE WITH FOR THE
         DESIRED DUE DATE OR CORRECTIONS TO AN ORDER.

5.       CUSTOMER TECHNICAL CONTACT...

         A TECHNICAL CONTACT WITH THE CUSTOMER THAT THE SWBT SNAC CAN COORDINATE
         WITH FOR THE PROVISIONING OF THE SERVICE.

6.       CPOC SERVICE REP...

         THE SWBT CPOC SERVICE REPRESENTATIVE THAT NEGOTIATES THE ORDER WILL
         ENTER THEIR NAME AND CONTACT INFORMATION.

7.       SWBT CKR AND TWO SIX CODE

         THIS INFORMATION WILL BE OBTAINED BY THE LIDB CUSTOMER FROM THEIR ORDER
         TO ESTABLISH THEIR CCS/SS7 INTERCONNECTION SERVICE OR FROM THEIR
         CCS/SS7 INTERCONNECTION SERVICE PROVIDER. THERE WILL ALWAYS BE FOUR
         LINKS FOR ACCESS TO THE LIDB.



<PAGE>   151
SOUTHWESTERN BELL TELEPHONE COMPANY                                  EXHIBIT III
CUSTOMER PROVIDED FACTOR REPORTS                                  SEPTEMBER 1996
                                                                          PAGE 7

INSTRUCTIONS FOR PAGES 3 & 4 -

LIDB HAS THREE QUERY SERVICES:   VALIDATION, CALLING NAME (CNAM), AND
                                 ORIGINATING LINE NUMBER SCREENING (OLNS)

THERE IS NOT A SPECIFIC NUMBER OF POINT CODES REQUIRED FOR ANY LIDB SERVICE. THE
LIDB CUSTOMER CAN SUBMIT AS MANY COPIES OF PAGES 3 & 4 AS REQUIRED FOR THEIR
POINT CODES PER REQUEST.

THE VALIDATION, CNAM, AND OLNS WILL BE ESTABLISHED ON A SINGLE BILLING ACCOUNT.
IF THE LIDB CUSTOMER WOULD LIKE SEPARATE BILLING ACCOUNTS, THEN SEPARATE BANs
MUST BE REQUESTED (i.e. "ESTABLISH SEPARATE BILLING ACCOUNTS") IN THE BILLING
ACCOUNT NUMBER FIELD ON PAGE 2. IF AN EXISTING LIDB CUSTOMER WANTS TO ESTABLISH
THEIR LIDB CNAM ON A SEPARATE BILLING ACCOUNT, THEN THE LIDB CUSTOMER SHOULD
ENTER "NEW BAN (OR SEPARATE BAN) FOR THE LIDB CNAM SERVICE" IN THE BILLING
ACCOUNT NUMBER FIELD ON PAGE 2. THE SAME WILL APPLY FOR A SEPARATE BAN FOR OLNS.
IN ORDER TO SET UP SEPARATE BILLING ACCOUNTS, THE POINT CODES FOR THE LIDB
VALIDATION, CNAM, AND OLNS SERVICES CANNOT BE THE SAME. THE CUSTOMER WILL USE
BOTH PAGES 3 & 4 TO SUBMIT THEIR POINT CODES SEPARATELY FOR SEPARATE BILLING
ACCOUNTS.

1.       LIDB VALIDATION SERVICE____________CALLING NAME SERVICE_____
         ORIGINATING LINE NUMBER SCREENING_____

         ENTER A CHECK MARK OR AN "X" TO INDICATE WHICH OF THE LIDB SERVICES THE
         ORDER FORM IS REQUESTING TO ESTABLISH OR DELETE. IF ALL LIDB SERVICES
         ARE REQUESTED ON THE SAME ORDER, THE POINT CODES FOR EACH SERVICE MUST
         BE LISTED ON SEPARATE PAGES. THIS WILL ENABLE SWBT TO APPLY THE CORRECT
         NONRECURRING CHARGES.

2.       ACTIVITY TYPES

         IF A LIDB CUSTOMER NEEDS TO CHANGE AN EXISTING OPC ON AN ESTABLISHED
         ACCOUNT, THE "D" SHOULD BE USED TO INDICATE THE OPC CHANGING FROM AND
         THE "N" SHOULD BE USED TO INDICATE THE OPC CHANGING TO.



<PAGE>   152
SOUTHWESTERN BELL TELEPHONE COMPANY                                  EXHIBIT III
CUSTOMER PROVIDED FACTOR REPORTS                                  SEPTEMBER 1996
                                                                          PAGE 8

PAGES 3 & 4 INSTRUCTIONS CONTINUED -

LIST OF ORIGINATING POINT CODES AND ACTIVITY TYPE

ACTIVITY TYPES:  N - ESTABLISHING OR ADDING NEW POINT CODE(S)
                 D - DELETE EXISTING POINT CODE(S)


PLEASE NOTE IN THE FOLLOWING EXAMPLES, THE ORDER FORM ACTIVITY IS THE ENTRY FROM
PAGE 2, NUMBER 3.  THIS IS NOT THE ACTIVITY TYPE.


EXAMPLE 1 - ORDER FORM ACTIVITY IS "IN" TO ESTABLISH A NEW ACCOUNT AND SERVICE

ACT.       ORIGINATING POINT                    ACT.      ORIGINATING POINT
TYPE       CODES:                               TYPE      CODES:

 N         XXX-XXX-XXX                           N        XXX-XXX-XXX


EXAMPLE 2 -  ORDER FORM ACTIVITY IS "C" TO CHANGE AN EXISTING POINT CODE OR TO
             ADD A NEW POINT CODE AND DELETE AN EXISTING POINT CODE

ACT.       ORIGINATING POINT                    ACT.      ORIGINATING POINT
TYPE       CODES:                               TYPE      CODES:

 N         XXX-XXX-XXX                           D        XXX-XXX-XXX


EXAMPLE 3 - ORDER FORM ACTIVITY IS "D" TO DISCONNECT THE ACCOUNT AND THE SERVICE

ACT.       ORIGINATING POINT                    ACT.      ORIGINATING POINT
TYPE       CODES:                               TYPE      CODES:

 D         XXX-XXX-XXX                           D        XXX-XXX-XXX


THE REMARKS SECTION MAY BE UTILIZED BY SWBT OR THE LIDB CUSTOMER.

THE DATE AND TIME RECEIVED WILL BE ENTERED BY THE SWBT CPOC UPON RECEIPT OF THE
FORM.

AFTER THE FORM HAS BEEN COMPLETED, IT SHOULD BE MAILED OR FAXED TO THE SWBT
ICSC IN ST. LOUIS, MISSOURI.





<PAGE>   153


                                                                 APPENDIX MAP


                              KANSAS CITY, MISSOURI


ILEC MANDATORY AREAS
- - FERRELVIEW






















<PAGE>   154
                                                                    APPENDIX OSS
                                                                          PAGE 2


                                  Appendix OSS

                 ACCESS to OPERATIONS SUPPORT SYSTEMS FUNCTIONS

                                  Appendix OSS

                 ACCESS TO OPERATIONS SUPPORT SYSTEMS FUNCTIONS

1.       GENERAL CONDITIONS

         1.1 This Appendix sets forth the terms and conditions under which SWBT
provides nondiscriminatory access to SWBT's operations support systems (OSS)
"functions" to LSP for pre-ordering, ordering, provisioning, maintenance /
repair, and billing. Such functions will be made available as described herein
for Resold Services, as provided in Appendix Resale, and for Unbundled Network
Elements (UNE), as provided in Appendix UNE.

         1.2 The functions, for Resale and UNE, will be accessible via
electronic interface, as described herein, where such functions are available.
Manual access will be available to all pre-ordering, ordering, provisioning, and
billing functions via the Local Service Provider Service Center (LSPSC). Repair
and maintenance functions are available via manual handling by the Local Service
Provider Center (LSPC).

         1.3 LSP agrees to utilize SWBT electronic interfaces, as SWBT defines
in its requirements, only for the functions described herein for the purposes of
establishing and maintaining Resale services or UNE. LSP agrees that such use
will comply with the summary of SWBT's Operating Practice No. 113, Protection of
Electronic Information, titled Local Service Provider Security Policies and
Guidelines.

         1.4 LSP acknowledges and agrees that access to OSS functions will only
be utilized to view an end-user's Customer Proprietary Network Information under
the conditions set forth and agreed to in Exhibit A of this Appendix.

         1.5 By utilizing electronic interfaces to access OSS functions, LSP
acknowledges and agrees to perform accurate and correct billing functions that
occur during ordering per the terms of this Agreement. Further, LSP recognizes
that such billing functions for conversion orders require viewing CPNI as
described in 1.4 above. All exception handling must be requested manually from
LSPSC.

         1.6 In areas where Resale and UNE service order transactions cannot be
provided via an electronic interface for the pre-order, ordering and
provisioning processes, SWBT and LSP will utilize manual processes until such
time as the transactions can be electronically transmitted.

         1.7 SWBT will provide a help desk function for electronic system
interfaces.

         1.8 SWBT and LSP will jointly establish interface contingency and
disaster recovery plans for the pre-order, ordering and provisioning of Resale
services and UNE.



<PAGE>   155
                                                                    APPENDIX OSS
                                                                          PAGE 3

         1.9 SWBT reserves the right to modify or discontinue the use of any
system or interface as it deems appropriate.

         1.10 If LSP elects to utilize industry standardized electronic
interfaces for Resale or UNE, SWBT and LSP agree to work together in the Order
and Billing Forum (OBF) and the Telecommunications Industry Forum (TCIF) to
establish and conform to uniform industry standards for electronic interfaces
for pre-order, ordering, and provisioning. Neither Party waives its rights as
participants in such forums in the implementation of the standards. To achieve
industry standard system functionality as quickly as possible, the Parties
acknowledge that SWBT may deploy these interfaces with requirements developed in
advance of industry standards. Thus, subsequent modifications may be necessary
to comply with emerging standards. LSP and SWBT are individually responsible for
evaluating the risk of developing their respective systems in advance of
standards and agree to support their own system modifications to comply with new
requirements.

2.       PRE-ORDER

         2.1 SWBT will provide access to pre-order functions to support LSP
ordering of Resale services and UNE via several electronic interfaces. The
Parties acknowledge that ordering requirements necessitate the use of current,
real time pre-order information to accurately build service orders. The
following lists represent pre-order information that will be available to LSP so
that LSP order requests may be created to comply with SWBT ordering
requirements.

         2.2      PRE-ORDERING FUNCTIONS FOR RESALE SERVICES WILL INCLUDE:

                  2.2.1 customer name, billing address and residence or business
address, billed telephone numbers and features and services available in the end
office where the customer is provisioned;

                  2.2.2 features and services to which the customer subscribes
(LSP agrees that LSP's representatives will not access the information specified
in this Subsection until after the customer requests that the customer's local
exchange service provider be changed to LSP and such request complies with
conditions of Exhibit A of this Appendix.)

                  2.2.3 a telephone number (if the customer does not have one
assigned) with the customer on-line.

                  2.2.4 service availability dates to the customer;

                  2.2.5 information regarding the dispatch / installation
schedule, if applicable;

                  2.2.6 PIC options for intraLATA toll (when available) and
interLATA toll;

                  2.2.7 address verification.



<PAGE>   156
                                                                    APPENDIX OSS
                                                                          PAGE 4



         2.3      PRE-ORDERING FUNCTIONS FOR UNE WILL INCLUDE:

                  2.3.1 customer name, billing address and residence or business
address, billed telephone numbers and features and services available in the end
office where the customer is provisioned;

                  2.3.2 features and services to which the customer subscribes
(LSP agrees that LSP's representatives will not access the information specified
in this Subsection until after the customer requests that the customer's local
exchange service provider be changed to LSP, and such request complies with
conditions of Exhibit A of this Appendix.)

                  2.3.3 telephone number (if the customer does not have one
assigned) with the customer on-line;

                  2.3.4 PIC options for intraLATA toll (when available) and
interLATA toll;

                  2.3.5 address verification;

                  2.3.6 channel facility assignment (CFA), network channel (NC),
and network channel interface (NCI) data

         2.4. ELECTRONIC ACCESS TO PRE-ORDER FUNCTIONS: Upon request by LSP for
electronic access to pre-ordering functions, SWBT will provide LSP access to one
or more of the following systems:

                  2.4.1 RESALE SERVICES PRE-ORDER SYSTEM AVAILABILITY:

                        2.4.1.1 Residential Easy Access Sales Environment
(R-EASE): R-EASE is an ordering entry system through which SWBT will provide LSP
access for the functions of pre-ordering SWBT's Resale services so long as EASE
is utilized to order SWBT Residential Resale Services.

                        2.4.1.2 Business Easy Access Sales Environment (EASE):
B-EASE is an ordering entry system through which SWBT will provide LSP access
for the functions of pre-ordering SWBT's Resale services so long as such access
is utilized to order SWBT's Business Resale Services.

                  2.4.2 RESALE AND UNE PREORDER SYSTEM AVAILABILITY:

                        2.4.2.1 DataGate: DataGate is transaction-based data
query system through which SWBT will provide LSP access for the functions of
gathering pre-ordering information to support industry standardized ordering
processes for Residential and Business Resale services. When ordering Resale
services or UNE, LSP's representatives will have access to a pre-order
electronic gateway provided by SWBT for both consumer and business customers
that provides real-time access to SWBT's operations systems. This gateway shall
be a Transmission Control Protocol/Internet Protocol (TCP/IP) gateway and will
allow the LSP representatives to perform the pre-order functions for Resale
services and UNE, as described



<PAGE>   157
                                                                    APPENDIX OSS
                                                                          PAGE 5



above. SWBT and LSP agree to work together to develop and implement an
electronic communication interface that will replace this initial pre-order
electronic interface consistent with industry standards developed by the OBF and
the TCIF.

                        2.4.2.2 VERIGATE is an Access Service Pre-order system
that will also provide access to the pre-ordering functions for Resale Services
and UNE. VERIGATE may be used in connection with electronic or manual ordering.
VERIGATE provides the UNE pre-order capability of identifying CFA information,
NC, and NCI codes that are associated with order requirements for UNE.

         2.5      OTHER PRE-ORDER FUNCTION AVAILABILITY:

                  2.5.1 Where due dates are not available electronically, SWBT
will provide LSP with due date interval for inclusion in the service order
request.

                  2.5.2 In addition to electronic interface access to pre-order
information, upon request, SWBT will provide LSP pre-order information in batch
transmission for the purposes of back-up data for periods of system
unavailability. The parties recognize such information must be used to construct
order requests only in exception handling.

3.       ORDERING/PROVISIONING

         3.1 SWBT will provide access to ordering functions to support LSP
provisioning of Resale services and UNE via one or more electronic interfaces.
Upon request for electronic access to ordering functions, SWBT will provide LSP
access to one or more of the following systems or interfaces:

         3.2      RESALE SERVICES ORDER REQUEST SYSTEM AVAILABILITY:

                  3.2.1 R-EASE is available for the generation of Residential
Resale services orders. Ordering Flows will be available via these systems for
the following ordering functions: Conversion ("as is" or "with changes"); Change
(Features, Listings, Long Distance); New Connect; Disconnect; From and To
(change of premises with same service).

                  3.2.2 B-EASE is available for the generation of Business
Resale services orders. Ordering Flows will be available via these systems for
the following ordering functions: Conversion ("as is" or "with changes"); Change
(Features, Listings, Long Distance); New Connect; Disconnect; From and To
(change of premises with same service).

                  3.2.3 SWBT will provide LSP with an Electronic Data
Interexchange (EDI) Interface for transmission of industry-standardized Resale
service order requests in formats as defined by the Ordering and Billing Forum
(OBF) and EDI mapping as defined by TCIF. EDI ordering functionality will be
made available as negotiated and implemented in timeframes mutually acceptable
to SWBT and LSP.

         3.3      UNE SERVICE ORDER REQUEST ORDERING SYSTEM AVAILABILITY:


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                                                                    APPENDIX OSS
                                                                          PAGE 6



                  3.3.1 In ordering and provisioning UNE, LSP and SWBT will
utilize mutually agreeable standard industry order formats and data elements
developed by OBF and TCIF EDI. Where industry standards do not currently exist
for the ordering and provisioning of UNE, LSP and SWBT agree to jointly develop
a form for ordering Common-Use UNE. Common-Use UNE, including, without
limitation, tandem switching, signaling and call-related databases, Operator
Services and DA, and Operations Support Systems, shall be ordered in a manner
that is consistent with OBF Access Service Request Process; in addition
customized routing will be ordered in the same manner. Customer Specific UNE,
including, Local Loop (which includes NID), and unbundled Local Switching, and
Interim Number Portability will be ordered consistent with the OBF Local Service
Request (LSR) process.

         3.4 SWBT will provision Resale Services and UNE as prescribed in LSP
order requests. Access to status on such orders of Resale services and UNE will
be provided via the following electronic interfaces:

                  3.4.1 Customer Network Administration (CNA) will allow LSP to
check service order status via CNA.

                  3.4.2 In cases of industry-standardized EDI ordering, SWBT
will provide to LSP an EDI electronic interface for transferring and receiving
orders, Firm Order Confirmation (FOC), service completion, and, as available,
other provisioning data and information. SWBT will provide LSP with a FOC for
each Resale and UNE order. The FOC includes but is not necessarily limited to:
purchase order number, telephone number, Local Service Request number, due date,
Service Order number, and completion date. Upon work completion, SWBT will
provide LSP with an 855 EDI transaction-based Order Completion that states when
that order was completed. When available, SWBT will provide LSP an 865 EDI
transaction-based Order Completion.

                  3.4.3 A file transmission may be provided to confirm order
completions for R-EASE or B-EASE order processing. This file will provide
service order information of all distributed and completed orders for LSP,
regardless of order entry mechanism.

4.       MAINTENANCE/REPAIR

         4.1 Two electronic interfaces are accessible to place, and check the
status of, trouble reports for both Resale and UNE. Upon request, LSP may access
these functions via the following methods:

                  4.1.1 CNA system access provides LSP with SWBT software that
allows LSP to submit trouble reports and subsequently check status on trouble
reports for LSP end-users. CNA will provide ability to review the maintenance
history of a converted Resale LSP account.

                  4.1.2 Electronic Bonding Interface (EBI) is an
industry-standardized interface that is available for trouble report submission
and status updates. This EBI will conform to ANSI standards T1:227:1995 and
T1.228:1995, Electronic Communications Implementation Committee (ECIC) Trouble
Report Format Definition (TFRD) Number 1 as defined in ECIC document
ECIC/TRA/95-003, and all standards referenced within those documents, as
mutually



<PAGE>   159
                                                                    APPENDIX OSS
                                                                          PAGE 7



agreed upon by LSP and SWBT. Functions currently implemented will include Enter
Trouble, Request Trouble Report Status, Add Trouble Information, Modify Trouble
Report Attributes, Trouble Report Attribute Value Change Notification, and
Cancel Trouble Report, as explained in 6 and 9 of ANSI T1.228:1995. LSP. SWBT
will exchange requests over a mutually agreeable X.25-based network.

5.       BILLING

         5.1 SWBT shall bill LSP for resold services and UNE. SWBT shall send
associated billing information to LSP as necessary to allow LSP to perform
billing functions. At minimum SWBT will provide LSP billing information in a
paper format or via magnetic tape, as agreed to between LSP and SWBT.

         5.2 Upon request, electronic access to billing information for Resale
Services will also be available via the following interfaces:

                  5.2.1 LSP may receive Bill Plus(TM), an electronic version of
their electronic bill as described in and in accordance with SWBT's Local
Exchange Tariff.

                  5.2.2 LSP may receive a mechanized bill format via the
industry standards EDI.

                  5.2.3 LSP may also view billing information through the CNA
system.

                  5.2.4 SWBT shall provide the Usage Billable Records for Resale
Services via EMR industry standard format with a daily feed.

                  5.2.5 LSP may receive Local Disconnect Report records (via
CARE records) electronically that indicate when LSP's customers change their
local service provider.

         5.3 Upon request electronic access to billing information for UNE will
also be available via the following interfaces:

                  5.3.1 SWBT will make available a mechanized bill data tape
(local) format by February 1997.

                  5.3.2 LSP may also view billing information through the CNA
system.

                  5.3.3 SWBT shall provide the Usage/Toll Billable Records for
UNE via EMR industry standard format with a daily feed.

                  5.2.4 LSP may receive Local Disconnect Report records (via
CARE records) electronically that indicate when LSP's customers, utilizing SWBT
ports, change their local service provider.

6.       REMOTE ACCESS FACILITY

         6.1 LSP must access the following SWBT's OSS functions via a LSP Remote
Access


<PAGE>   160
                                                                    APPENDIX OSS
                                                                          PAGE 8

Facility (LRAF) located in Dallas, Texas: R-EASE, B-EASE, CNA, DATAGATE and
VERIGATE.

         6.2 LSP may use three types of access: Switched, Private Line, and
Frame Relay. For Private Line and Frame Relay connections, LSP shall provide its
own router, circuit, and two Channel Service Units/Data Service Units (CSU/DSU).
The demarcation point shall be the router interface at the LRAF. Switched Access
connections require LSP to provide its own modems and connection to the SWBT
LRAF. LSP shall pay the cost of the call if Switched Access is used.

         6.3 LSP shall use TCP/IP to access SWBT OSS via the LRAF. In addition,
each LSP shall have a valid Internet Protocol (IP) network address. A user-id
/password unique to each individual accessing an OSS shall be maintained to
access SWBT OSS's. LSP shall provide estimates regarding its volume of
transactions, number of concurrent users, desired number of private line or
dial-up (switched) connections, and length of a typical session.

         6.4 LSP shall attend and participate in implementation meetings to
discuss LSP LRAF access plans in detail and schedule testing of such
connections. SWBT shall make a Help Desk function available to assist LSP on an
ongoing basis in accessing any SWBT OSS over the LRAF.

7.       OPERATIONAL READINESS TEST (ORT) FOR ORDERING/PROVISIONING

         7.1 LSP must participate with SWBT in Operational Readiness Testing
(ORT), which will allow for the testing of the systems, interfaces, and
processes for the ordering and provisioning of Resale services. ORT will be
completed in conformance with agreed upon implementation dates.

8.       RATES - KANSAS

         8.1 LSP requesting access to one or more of the SWBT OSS functions
(i.e., preordering, ordering / provisioning, maintenance / repair, billing)
agrees to pay the following rate:

              System Access                      $ 3,500.00 / month

         8.2 LSP requesting functions via interfaces that require connection to
the Remote Access Facility, as described in section 6, agrees to pay the
following rate(s) depending upon on method of access utilized:

         Remote Access Facility Access Methods
              Direct Connection Per Port         $  1,580.00 / month
              Dial Up Per Port                   $    316.00 / month

         8.4 LPS requesting the Bill Plus, as desribed in 5.2.1, agrees to pay
applicable tariffed rate, less Resale discount.

         8.3 LSP requesting the billing function for Usage Billable Records, as
described in



<PAGE>   161
                                                                    APPENDIX OSS
                                                                          PAGE 9


5.2.4, agrees to pay $.003 per message transmitted.

         8.4 LSP requesting the Local Disconnect Report, as described in 5.2.5,
agrees to pay $0.10 per record transmitted.

         8.4 Should unforeseen modifications and costs to provision OSS
functions become required by SWBT or industry standards, SWBT reserves the right
to modify its rate structure. In addition, should LSP request custom development
of an exclusive interface to support OSS functions, such development will be
considered by SWBT on an Individual Case Basis (ICB) and priced as such.

9.       EFFECTIVE DATE, TERM

         9.1 The Appendix OSS will be effective upon approval by the state
commission when it determined that the entire Interconnection Agreement is in
compliance with Sections 251 and 252 of the Act.

         9.2 The Term Appendix OSS will be the shorter of the Term of this
Interconnection Agreement or December 31, 1998. Continuation of Appendix OSS
follows the continuation rules of the Agreement. Should the Interconnection
Agreement establish a new term, the Term of Appendix OSS will be the shorter of
one year, or the new Term of the Interconnection Agreement. Should the term of
the Interconnection Agreement Expire without provision for continuance, the Term
of Appendix OSS expires as well.



<PAGE>   162


                     APPENDIX OSS - RESALE & UNE - EXHIBIT A
                                                 PAGE 1 OF 1

         BLANKET CERTIFICATION FOR END-USER AUTHORIZATION FOR RELEASE OF
                 CUSTOMER PROPRIETARY NETWORK INFORMATION (CPNI)

The undersigned hereby agrees:

Before it may obtain CPNI of an end-user, whether via an independent request or
in the course of ordering SWBT's network elements or services via manual and/or
mechanized interfaces, the undersigned must, at least, certify that "yes" (Y) it
has obtained Authorization for Release of CPNI and provide the name of the
individual authorizing the release of CPNI. By these indications, the
undersigned affirms that a current Authorization for the Release of CPNI has
been obtained from an end-user and that it includes the expressed content of the
language, "Minimum Scope." SWBT may then provide the CPNI referenced herein.

         Minimum Scope: Authorization for the release of CPNI

         1)       An affirmative written request that substantially reflects the
                  following: "This document serves as instruction to all holders
                  of my local exchange telecommunications Customer Proprietary
                  Network Information (CPNI) to provide such information to the
                  undersigned. I understand that this CPNI includes the
                  following information: billing name, service address, billing
                  address, service and feature subscription, directory listing
                  information long distance carrier identity, and all pending
                  service order acitivity. This Authorization remains in effect
                  until such time that I revoke it directly or appoint another
                  individual/company with such capacity or undersigned receives
                  notice to disconnect my local exchange service or notice that
                  a service disconnect has been performed. At and from such
                  time, this Authorization is null and void."

         or

         2)       Authorization for change in local exchange service and release
                  of CPNI with documentation that adheres to an requirements of
                  state and federal law, as applicable.


                                                     ---------------------------
                                                     Signed

                                                     ---------------------------
                                                     Name (Typed/Printed)

                                                     ---------------------------
                                                     Title

                                                     ---------------------------
                                                     Company

                                                     ---------------------------
                                                     Date


<PAGE>   163


                                                    APPENDIX OSS - RESALE & UNE
                                                                 SIGNATURE PAGE
                                                                    PAGE 1 OF 1








DIGITAL TELEPORT, INC.  (MISSOURI)           SOUTHWESTERN BELL TELEPHONE COMPANY


By:______________________________            By:________________________________
    (name printed or typed)                         (name printed or typed)


Signature:______________________             Signature:_________________________


Title:__________________________             Title:_____________________________
          (printed or typed)                           (printed or typed)


Date:___________________________             Date:______________________________





<PAGE>   164


                                                                    APPENDIX OS
                                                                    PAGE 2 OF 8


                                   APPENDIX OS

                                OPERATOR SERVICES

This Appendix sets forth the terms and conditions under which Southwestern Bell
Telephone Company ("SWBT") agrees to provide Operator Services for LSP ("LSP").

I.       SERVICES

         SWBT will provide the following Operator Services:

         A.      FULLY AUTOMATED CALL PROCESSING - Allows the caller to complete
                 a call utilizing equipment without the assistance of a SWBT
                 operator, hereafter called "Operator."

                 This allows the caller the option of completing calls through
                 an automated alternate billing system (AABS). Automated
                 functions can only be activated from a touch-tone telephone.
                 Use of a rotary telephone and failure or low response by the
                 caller to the audio prompts will bridge the caller to an
                 Operator for assistance. The called party must also have
                 Touch-tone service to automatically accept calls that are
                 billed collect or to a third number.

         B.      OPERATOR-ASSISTED CALL PROCESSING - Allows the caller to
                 complete a call by receiving assistance from an Operator.

II.      DEFINITIONS

         A.      FULLY AUTOMATED CALL PROCESSING

         SWBT will support the following fully automated call types for LSP:

                 1.    FULLY AUTOMATED CALLING CARD STATION-TO-STATION - This
                       service is provided when the caller dials zero (0), plus
                       the desired telephone number and the telecommunications
                       calling card number to which the call is to be charged.
                       The call is completed without the assistance of an
                       Operator. An authorized telecommunications calling card
                       for the purpose of this Appendix, is one for which SWBT
                       can perform billing validation. Fully-Automated Calling
                       Card Call Service may also include the following
                       situations:

                       a.   When an individual with a disability dials zero (0)
                            and identifies himself or herself as disabled, he or
                            she will provide the Operator the desired telephone
                            number and the calling card number to which the call
                            is to be billed.
<PAGE>   165
                                                                    APPENDIX OS
                                                                    PAGE 3 OF 8



                       b.   When due to trouble on the network, or lack of
                            service components (facilities to the AABS network),
                            the automated call processing cannot be completed
                            without assistance from an Operator.

                       c.   When an Operator reestablishes an interrupted call
                            that meets any of the situations described in this
                            call type.

                 2.    FULLY AUTOMATED STATION-TO-STATION - This service is
                       limited to those calls placed collect or billed to a
                       third number. The caller dials zero (0) plus the
                       telephone number desired, the service selection codes
                       and/or billing information as instructed by the automated
                       equipment. The call is completed without the assistance
                       of an Operator. Fully Automated Station-to-Station
                       service may also include the following situations:

                       a    When an individual with a disability identifies
                            himself or herself as disabled and provides the
                            Operator the number to which the call is to be
                            billed (either collect or third number).

                       b.   When due to trouble on the network or lack of
                            service components, the automated call cannot be
                            completed without assistance from an Operator.

                       c.   When an Operator reestablishes an interrupted call
                            that meets any of the situations described in this
                            call type.

         B.      OPERATOR-ASSISTED CALL PROCESSING

         SWBT will support the following operator-assisted call types for LSP:

                 1.    SEMI-AUTOMATED STATION-TO-STATION - A service provided
                       when the caller dials zero (0) plus the telephone number
                       desired and the call is completed with the assistance of
                       an Operator. Semi-Automated Station-to-Station service
                       may also include the following situations:

                       a.   Where the caller does not dial zero (0) prior to
                            calling the number desired from a public or
                            semi-public telephone, or from a telephone where the
                            call is routed directly to an Operator (excluding
                            calling card calls).

                       b.   When an Operator re-establishes an interrupted call
                            that meets any of the situations described in this
                            call type.
<PAGE>   166
                                                                    APPENDIX OS
                                                                    PAGE 4 OF 8

                  2.       SEMI-AUTOMATED PERSON-TO-PERSON - A service in which
                           the caller dials zero (0) plus the telephone number
                           desired and specifies to the Operator the particular
                           person to be reached or a particular PBX station,
                           department or office to be reached through a PBX
                           attendant. This service applies even if the caller
                           agrees, after the connection is established, to speak
                           to any party other than the party previously
                           specified. Semi-Automated Person-to-Person service
                           may also include:

                           a.       Where the caller does not dial a zero (0)
                                    prior to dialing the number from a public or
                                    semi-public telephone, or where the call is
                                    routed directly to an Operator.

                           b.       When an operator reestablishes an
                                    interrupted call that meets any of the
                                    situations described in this call type.

                  3.       SEMI-AUTOMATED CALLING CARD STATION-TO-STATION - A
                           service provided when the caller dials zero (0) plus
                           the desired telephone number and provides the
                           Operator the calling card number to which the call is
                           to be charged. Semi-Automated Calling Card
                           Station-to-Station service may also include the
                           following situations:

                           a.       When the caller does not dial zero (0) prior
                                    to dialing the number desired from a public
                                    or semi-public telephone, or from a
                                    telephone that is directly routed to an
                                    Operator, and the call is billed to a
                                    calling card.

                           b.       When an Operator reestablishes an
                                    interrupted call that meets any of the
                                    situations described in this call type.

                  4.       STATION-TO-STATION (OPERATOR HANDLED) - A service
                           provided when the caller dials zero (0) and places a
                           sent paid, collect, third number or calling card
                           station-to-station call using an Operator's
                           assistance. These calls may originate from a private,
                           public or semi-public telephone. The service may also
                           include the situation when an Operator reestablishes
                           an interrupted call that meets any of the situations
                           described in this call type.

                  5.       PERSON-TO-PERSON (OPERATOR HANDLED) - A service in
                           which the caller dials zero (0) and specifies to the
                           Operator the number desired and the person to be
                           reached, or a particular PBX station, department or
                           office to be reached through a PBX attendant, or a
                           particular mobile service point to be reached through
                           a mobile telephone attendant. The call remains a
                           person-to-person call even if the caller agrees,
                           after the connection is established, to speak to any
                           party other than the party previously specified. The
                           service may also include situations when an
<PAGE>   167
                                                                    APPENDIX OS
                                                                    PAGE 5 OF 8

                           Operator reestablishes an interrupted call that meets
                           any of the situations described in this call type.

                  6.       LINE STATUS VERIFICATION - A service in which the
                           caller asks the Operator to determine the condition
                           of a telephone line.

                  7.       BUSY LINE INTERRUPT - A service in which the caller
                           asks the Operator to interrupt a conversation in
                           progress, to determine if one of the parties is
                           willing to speak to the caller requesting the
                           interrupt. A Busy Line Interrupt charge will apply
                           even if no conversation is in progress at the time of
                           the interrupt attempt, or when the parties
                           interrupted refuse to terminate the conversation in
                           progress.

                  8.       OPERATOR TRANSFER SERVICE - A service offered by SWBT
                           in which the local caller requires Operator
                           Assistance for completion of a call outside the
                           originating LATA. The SWBT Operator transfers the
                           call to an interexchange carrier selected by the
                           caller from a list of IXCs provided to SWBT by the
                           LSP. This transfer service is similar to SWBT's
                           "0perator Transfer" service offering. LSP agrees to
                           obtain all necessary compensation arrangements
                           between LSP and participating carriers.

                  9.       MISCELLANEOUS - Includes the following call types:
                           General Assistance and Rate Quotes, 800, 888 and
                           connections to all other Toll Free services, Repair
                           Bureau and Business Office requests, credit requests,
                           NPA-NXX location requests, and all other 0- No
                           Attempt services.

III.     CALL BRANDING AND RATE REFERENCE REQUIREMENTS

         A.       REQUIREMENTS - Pursuant to s. 226 (b) of The
                  Telecommunications Act of 1996, each provider of Operator
                  Services is required to:

                  1.       provide its brand at the beginning of each telephone
                           call and before the consumer incurs any charge for
                           the call; and

                  2.       disclose immediately to the consumer, upon request a
                           quote of its rates or charges for the call.

         B.       CALL BRANDING - In compliance with A. 1. above, SWBT will
                  brand Operator Services in LSP's name based upon the criteria
                  outlined below:

                  1.       LSP will provide SWBT with written specification of
                           its company name to be used in creating LSP specific
                           branding messages for its OS calls.
<PAGE>   168
                                                                    APPENDIX OS
                                                                    PAGE 6 OF 8



                  2.       An initial non-recurring charge applies per TOPS
                           switch, per load for the establishment of Call
                           Branding as well as a charge per TOPS switch, per
                           subsequent load to change the brand. In addition, a
                           per call charge applies for every Operator Services
                           call handled by SWBT on behalf of LSP when such
                           services are provided in conjunction with: i) the
                           purchase of SWBT's unbundled local switching; or ii)
                           when multiple brands are required on a single
                           Operator Services trunk. Prices for Call Branding are
                           as outlined in Exhibit II, attached hereto and
                           incorporated herein.

         C.       OPERATOR SERVICES (OS) RATE/REFERENCE INFORMATION - In
                  compliance with A.2. above, SWBT will provide LSP Operator
                  Services Rate/Reference Information based upon the criteria
                  outlined below:

                  1.       LSP will furnish OS Rate and Reference Information in
                           a mutually agreed to format or media thirty (30) days
                           in advance of the date when the Operator Services are
                           to be undertaken.

                  2.       LSP will inform SWBT, in writing, of any changes to
                           be made to such Rate/Reference Information ten (10)
                           working days prior to the effective Rate/Reference
                           change date. LSP acknowledges that it is responsible
                           to provide SWBT updated Rate/Reference Information in
                           advance of when the Rates/Reference Information are
                           to become effective.

                  3.       In all cases when a SWBT Operator receives a rate
                           request from a LSP end user, SWBT will quote the
                           applicable OS rates as provided by LSP.

                  4.       An initial non-recurring charge will apply per TOPS
                           switch for loading of LSP's Operator Services
                           Rate/Reference Information as well as a charge per
                           TOPS switch, for each subsequent change to either
                           LSP's Operator Services Rate or Reference
                           Information.

IV.      HANDLING OF EMERGENCY CALLS TO OPERATOR

         To the extent LSP's NXX encompasses multiple emergency agencies, SWBT
         will agree to query the caller on his/her community and to transfer the
         caller to the appropriate emergency agency for the caller's area. LSP
         must provide SWBT with the correct information to enable the transfer.
         When the assistance of another Carrier's operator is required, SWBT
         will attempt to reach the appropriate operator if the network
         facilities for inward assistance exist. LSP agrees to indemnify SWBT
         for any misdirected calls.

V.       RESPONSIBILITIES OF THE PARTIES

         A.       SWBT will be the sole provider of Operator Services for LSP's
                  local service area(s) listed in Exhibit I, which is attached
                  to this Appendix, beginning on the service effective date also
                  shown in Exhibit I. SWBT will provide Operator
<PAGE>   169
                                                                    APPENDIX OS
                                                                    PAGE 7 OF 8



                  Services only where the necessary physical facilities are
                  available and in place and under conditions previously stated
                  in this Appendix.

         B.       LSP will be responsible for providing the equipment and
                  facilities necessary for signaling and routing calls with
                  Automatic Number Identification (ANI) to each SWBT operator
                  switch. Should LSP seek to provide interexchange Operator
                  Services under this agreement, it is responsible for ordering
                  the necessary facilities through SWBT's interstate or
                  intrastate Access Service tariffs. Nothing in this agreement
                  in any way changes the manner in which an interexchange
                  Carrier obtains access service for the purpose of originating
                  or terminating interexchange traffic.

         C.       Facilities necessary for the provision of Operator Services
                  shall be provided by the parties hereto, using standard trunk
                  traffic engineering procedures to insure that the objective
                  grade of service is met. Each party shall bear the costs for
                  its own facilities. LSP shall bear the costs of facilities
                  necessary for signaling and routing calls with Automatic
                  Number Identification (ANI) to each SWBT operator switch. SWBT
                  shall bear the cost of facilities and equipment necessary to
                  provide Operator Services.

         D.       LSP will furnish in writing to SWBT, thirty (30) days in
                  advance of the date when the Operator Services are to be
                  undertaken, unless otherwise agreed to by the SWBT, all
                  records required by SWBT to provide the Operator Services.

         E.       LSP will keep all records finished to SWBT current by using
                  reporting forms and procedures that are mutually acceptable to
                  both parties, and will inform SWBT in advance of any changes
                  to be made in such records. SWBT will specify the required
                  interval for such advance notice. LSP will provide all records
                  and changes to records to SWBT in writing or in any other
                  mutually agreeable format.

         F.       SWBT will accumulate and provide the LSP such data as
                  necessary for the LSP to verify traffic volumes and bill its
                  end users.

VI.      METHODS AND PRACTICES

         SWBT will provide the Operator Services to LSP's end users in
         accordance with SWBT's OS methods and practices in effect for SWBT at
         the time the OS call is made, unless otherwise agreed in writing by
         both parties.

VII.     PRICING

         Pricing for Operator Services shall be based on the rates specified in
         Exhibit II, PRICING, which is attached and made part of this Appendix.
         The rates will apply from the service effective date through the term
         of this agreement as specified in paragraph X.,
<PAGE>   170
                                                                    APPENDIX OS
                                                                    PAGE 8 OF 8

         A. below. At any time beyond the specified or the term of this
         Appendix, SWBt may change the prices for the provision of OS upon one
         hundred-twenty (120) days' notice to LSP.

VIII.    MONTHLY BILLING

         SWBT will render monthly billing statements to LSP, and remittance in
         full will be due within thirty (30) days of receipt.

IX.      LIABILITY

         A.       In addition to the liability provisions contained in the
                  Agreement, LSP agrees to defend, indemnify, and hold harmless
                  SWBT from any and all losses, damages, or other liability
                  including attorneys fees that LSP may incur as a result of
                  claims, demands, wrongful death actions, or other suits
                  brought by any party that arise out of LSP's end users use of
                  Operator Services. LSP shall defend against all end user
                  claims just as if LSP had provided such service to its end
                  user with the LSP's own operators and shall assert its tariff
                  limitation of liability for benefit of both SWBT and LSP.

         B.       LSP also agrees to release, defend, indemnify, and hold
                  harmless SWBT from any claim, demand or suit that asserts any
                  infringement or invasion of privacy or confidentiality of any
                  person or persons caused or claimed to be caused, directly, or
                  indirectly, by SWBT employees and equipment associated with
                  provision of the Operator Services. This provision includes
                  but is not limited to suits arising from disclosure of the
                  telephone number, address, or name associated with the
                  telephone called or the telephone used to call the Operator
                  Services.

X.       TERMS OF APPENDIX

         A.       Unless sooner terminated, this Appendix will continue in force
                  for a period of one (1) year from the effective date of this
                  agreement and thereafter until terminated by one
                  hundred-twenty (120) days notice in writing from either Party
                  to the other.

         B.       If LSP terminates this agreement prior to the agreed-upon term
                  of this Appendix, LSP shall pay, within thirty (30) days of
                  the issuance of a final bill by SWBT, all amounts due for
                  actual services provided under this Appendix, plus estimated
                  monthly charges for the remainder of the term. Estimated
                  charges will be based on an average of the actual monthly
                  amounts billed by SWBT pursuant to this Appendix prior to its
                  termination.

         C.       The rates applicable for determining the amount(s) under the
                  terms outlined in this Section are those specified in Exhibit
                  II.



<PAGE>   171


                                                       APPENDIX OS - EXHIBIT I
                                                                   PAGE 1 OF 1

                                   APPENDIX OS
                              LOCAL SERVICE AREA(S)

                             EFFECTIVE:____________
                                          (mm/dd/yr)

The following table depicts the service area(s) covered by this Appendix:

- --------------------------------------------------------------------------------
   LSP'S LOCAL SERVICE AREA(S)                         EFFECTIVE DATE
- --------------------------------------------------------------------------------

- --------------------------------------------------------------------------------

- --------------------------------------------------------------------------------

- --------------------------------------------------------------------------------

- --------------------------------------------------------------------------------


<PAGE>   172




                                                       APPENDIX OS - EXHIBIT II
                                                                    PAGE 1 OF 1

                                   APPENDIX OS
                                     KANSAS
                                   EXHIBIT II
                           PRICING - FACILITIES BASED

                           EFFECTIVE:_______________
                                           (mm/dd/yr)

The following rates will apply for each service element:

           ---------------------------------------------------------------------
           A.       FULLY AUTOMATED CALL PROCESSING

           This usage rate applies to each call that has been completed on a
           fully automated basis.

                                     Rate per completed automated call   $0.179

           ---------------------------------------------------------------------
           B.       OPERATOR-ASSISTED CALL PROCESSING

           This usage rate applies to each call that has been answered by or
           forwarded to an operator.

                                           Rate per actual work second   $0.019
           ---------------------------------------------------------------------
           C.       CALL BRANDING
           An initial non-recurring charge applies per TOPS switch, per brand
           for the establishment of LSP specific Call Branding. An additional
           non-recurring charge applies for each subsequent change to the
           branding.
                           Rate per initial load group
                    Rate per load for Brand change                     $2,100.00
                              Per Call(1)                              $2,100.00
                                                                           $0.02
           ---------------------------------------------------------------------
           D.       OPERATOR SERVICES RATE/REFERENCE   INFORMATION

           An initial non-recurring charge applies per TOPS switch, per rate
           schedule, for the initial load of LSP's Operator Services Rate/
           Reference Information. An additional non-recurring charge applies for
           each subsequent change to Rate/Reference Information.

                              Rate per initial load
                    Rate per subsequent rate change                    $3,250.00
                 Rate per subsequent reference change                  $2,250.00
                                                                       $2,250.00
           ---------------------------------------------------------------------







- --------------------
(1) A per call charge will apply when OS are provided in conjunction with i)
unbundled local switching or ii) when multiple brands are required on a single
operator services trunk.




<PAGE>   173


                                                                  APPENDIX NIM
                                                                   PAGE 2 OF 5


         APPENDIX NETWORK INTERCONNECTION METHODS (NIM)

         This Appendix NIM designates Network Interconnection Methods (NIMs) to
         be used by the Parties. These include, but are not limited to: MidSpan
         Fiber Interconnection (MSFI); Virtual Collocation Interconnection;
         SONET Based Interconnection; Physical Collocation Interconnection;
         leasing of SWBT facilities; and other methods as mutually agreed to by
         the Parties.

1.       MID-SPAN FIBER INTERCONNECTION (MSFI)

         Mid-Span Fiber Interconnection (MSFI) between Southwestern Bell
         Telephone (SWBT) and LSP can occur at any mutually agreeable,
         economically and technically feasible point between LSP's premises and
         a SWBT tandem or end office. This interconnection will be on a
         point-to-point SONET system over single mode fiber optic cable.

         MSFI may be used to provide interconnection trunking as defined in
         Appendix ITR to Attachment 11: Network Interconnection Architecture.

A.       There are two basic mid-span interconnection designs:

         1.       Design One: LSP's fiber cable and SWBT's fiber cable are
                  connected at an economically and technically feasible point
                  between the LSP location and the last entrance manhole at the
                  SWBT central office.

                  The Parties may agree to a location with access to an existing
                  SWBT fiber termination panel. In these cases, the network
                  interconnection point (POI) shall be designated outside of the
                  SWBT building, even though the LSP fiber may be physically
                  terminated on a fiber termination panel inside of a SWBT
                  building. In this instance, LSP will not incur fiber
                  termination charges and SWBT will be responsible for
                  connecting the cable to the SWBT facility.

                  The Parties may agree to a location with access to an existing
                  LSP fiber termination panel. In these cases, the network
                  interconnection point (POI) shall be designated outside of the
                  LSP building, even though the SWBT fiber may be physically
                  terminated on a fiber termination panel inside of an LSP
                  building. In this instance, SWBT will not incur fiber
                  termination charges and LSP will be responsible for connecting
                  the cable to the LSP facility.

                  If a suitable location with an existing fiber termination
                  panel cannot be agreed upon, LSP and SWBT shall mutually
                  determine provision of a fiber termination panel housed in an
                  outside, above ground, cabinet placed at the physical POI.
                  Ownership and the cost of provisioning the panel will be
                  negotiated between the two parties.


<PAGE>   174
                                                                  APPENDIX NIM
                                                                   PAGE 3 OF 5




         2.       Design Two: LSP will provide fiber cable to the last entrance
                  manhole at the SWBT tandem or end office switch with which LSP
                  wishes to interconnect. LSP will provide a sufficient length
                  of fiber optic cable for SWBT to pull the fiber cable to the
                  SWBT cable vault for termination on the SWBT fiber
                  distribution frame (FDF). In this case the POI shall be at the
                  manhole location.

                  Each Party is responsible for designing, provisioning,
                  ownership and maintenance of all equipment and facilities on
                  its side of the POI. Each Party is free to select the
                  manufacturer of its Fiber Optic Terminal (FOT). Neither Party
                  will be allowed to access the Data Communication Channel (DCC)
                  of the other Party's FOT. The Parties will work cooperatively
                  to achieve equipment compatibility.

B.       The Parties will mutually agree upon the precise terms of each mid-span
         interconnection facility. These terms will cover the technical details
         of the interconnection as well as other network interconnection,
         provisioning and maintenance issues.

C.       The LSP location includes FOTs, multiplexing and fiber required to take
         the optical signal handoff from SWBT for interconnection trunking as
         outlined in Appendix ITR.

D. The fiber connection point may occur at several locations:

         1.       a location with an existing SWBT fiber termination panel. In
                  this situation, the POI shall be outside the SWBT building
                  which houses the fiber termination panel;

         2.       a location with access to an existing LSP fiber termination
                  panel. In these cases, the network interconnection point (POI)
                  shall be designated outside of the LSP building, even though
                  the SWBT fiber may be physically terminated on a fiber
                  termination panel inside a LSP building;

         3.       a location with no existing SWBT fiber termination panel. In
                  this situation, SWBT and LSP will negotiate provisioning,
                  maintenance and ownership of a fiber termination panel and
                  above ground outside cabinet as a POI and for connection of
                  the fiber cables;

         4.       a manhole outside of the SWBT central office. In this
                  situation, LSP will provide sufficient fiber optic cable for
                  SWBT to pull the cable into the SWBT cable vault for
                  termination on the SWBT FDF. The POI will be at the manhole
                  and SWBT will assume maintenance responsibility for the fiber
                  cabling from the manhole to the FDF.

E.       The SWBT tandem or end office switch includes all SWBT FOT,
         multiplexing and fiber required to take the optical signal hand-off
         provided from LSP for interconnection


<PAGE>   175
                                                                  APPENDIX NIM
                                                                   PAGE 4 OF 5



         trunking as outlined in Appendix ITR. This location is SWBT's
         responsibility to provision and maintain.

F.       In both designs, LSP and SWBT will mutually agree on the capacity of
         the FOT(s) to be utilized. The capacity will be based on equivalent
         DSls that contain trunks and interLATA traffic. Each Party will also
         agree upon the optical frequency and wavelength necessary to implement
         the interconnection. The Parties will develop and agree upon methods
         for the capacity planning and management for these facilities, terms
         and conditions for over provisioning facilities, and the necessary
         processes to implement facilities as indicated below. These methods
         will meet quality standards as mutually agreed to by LSP and SWBT.

2.       AVOIDANCE OF OVER PROVISIONING

         Underutilization is the inefficient deployment and use of the network
         due to forecasting a need for more capacity than actual usage requires,
         and results in unnecessary costs for SONET systems. To avoid over
         provisioning, the Parties will agree to joint facility growth planning
         as detailed below.

3.       JOINT FACILITY GROWTH PLANNING

         The initial fiber optic system deployed for each interconnection shall
         be the smallest standard available. For SONET this is an OC-3 system.
         The following list the criteria and processes needed to satisfy
         additional capacity requirements beyond the initial system.

A.       Criteria:

         1.       Investment is to be minimized;

         2.       Facilities are to be deployed in a "just in time" fashion.

B.       Processes

         1.       discussions to provide relief to existing facilities will be
                  triggered when either Party recognizes that the overall system
                  facility (DS1s) is at 90% capacity;

         2.       both Parties will perform a joint validation to ensure current
                  trunks have not been over-provisioned. If any trunk groups are
                  over-provisioned, trunks will be turned down as appropriate.
                  If any trunk resizing lowers the fill level of the system
                  below 90%, the growth planning process will be suspended and
                  will not be reinitiated until a 90% fill level is achieved.
                  Trunk design blocking criteria described in Appendix ITR will
                  be used in determining trunk group sizing requirements and
                  forecasts;
<PAGE>   176
                                                                  APPENDIX NIM
                                                                   PAGE 5 OF 5



         3.       if based on the forecasted equivalent DS1 growth, the existing
                  fiber optic system is not projected to exhaust within one
                  year, the Parties will suspend further relief planning on this
                  interconnection until a date one year prior to the projected
                  exhaust date. If growth patterns change during the suspension
                  period, either Party may re-initiate the joint planning
                  process;

         4.       if the placement of a minimum size FOT will not provide
                  adequate augmentation capacity for the joint forecast over a
                  two year period, and the forecast appears reasonable based
                  upon history, the next larger system may be deployed. In the
                  case of a SONET system, the OC-3 system could be upgraded to
                  an OC-12. If the forecast does not justify a move to the next
                  larger system, another minimal size system (such as on OC-3)
                  could be placed. This criteria assumes both Parties have
                  adequate fibers for either scenario. If adequate fibers do not
                  exist, both Parties would negotiate placement of additional
                  fibers;

         5.       both Parties will negotiate a project service date and
                  corresponding work schedule to construct relief facilities in
                  an effort to achieve "just in time" deployment;

         6.       the joint planning process/negotiations should be completed
                  within two months of identification of 90% fill.

4.       VIRTUAL COLLOCATION INTERCONNECTION

         The description of Virtual Collocation Interconnection is contained in
         SWBT's Virtual Collocation tariffs (i.e., SWBT's Tariff F.C.C. No. 73).

5.       SONET-BASED INTERCONNECTION

         The description of SONET-Based Interconnection is contained in SWBT's
         Sonet-Based Interconnection tariffs (i.e., SWBT's Tariff F.C.C. No.
         73).

6.       PHYSICAL COLLOCATION INTERCONNECTION

         SWBT will provide Physical Collocation Interconnection on
         nondiscriminatory terms and conditions at the time LSP requests such
         interconnection.

7.       LEASING OF SWBT'S FACILITIES

         LSP's leasing of SWBT's facilities for purposes of Attachment 11:
         Network Interconnection Architecture will be subject to the mutual
         agreement of the Parties.



<PAGE>   177






                         PHYSICAL COLLOCATION AGREEMENT

                                     BETWEEN

                       SOUTHWESTERN BELL TELEPHONE COMPANY

                                       AND

                             DIGITAL TELEPORT, INC.



<PAGE>   178


                                TABLE OF ARTICLES

ARTICLE I - PREMISES........................................................1

ARTICLE II - EFFECTIVENESS AND REGULATORY APPROVAL..........................2

ARTICLE III - TERM..........................................................3

ARTICLE IV- PREMISES CHARGES................................................4

ARTICLE V - INTERCONNECTION CHARGES.........................................7

ARTICLE VI - FIBER OPTIC CABLE AND DEMARCATION POINT........................7

ARTICLE VII - USE OF PREMISES...............................................8

ARTICLE VIII - STANDARDS...................................................10

ARTICLE IX - RESPONSIBILITIES OF THE INTERCONNECTOR........................11

ARTICLE X - QUIET ENJOYMENT................................................13

ARTICLE XI - ASSIGNMENT....................................................13

ARTICLE XII - CASUALTY LOSS................................................13

ARTICLE XIII - RE-ENTRY....................................................14

ARTICLE XIV - LIMITATION OF LIABILITY......................................15

ARTICLE XV - INDEMNIFICATION OF SWBT.......................................16

ARTICLE XVI - SERVICES, UTILITIES, MAINTENANCE AND FACILITIES..............17

ARTICLE XVII - LIMITATION OF ACTIONS; DISPUTE RESOLUTION...................17

ARTICLE XVIII - SUCCESSORS BOUND...........................................19

ARTICLE XIX - CONFLICT OF INTEREST.........................................19

ARTICLE XX - NON-EXCLUSIVE REMEDIES........................................20

ARTICLE XXI - NOTICES......................................................20

ARTICLE XXII - COMPLIANCE WITH LAWS........................................20

ARTICLE XXIII - OSHA STATEMENT.............................................21

ARTICLE XXIV- INSURANCE....................................................21

ARTICLE XXV - SWBT'S RIGHT OF ACCESS.......................................24

ARTICLE XXVI - PURPOSE AND SCOPE OF AGREEMENT..............................24

ARTICLE XXVII - MISCELLANEOUS..............................................25



<PAGE>   179






                         PHYSICAL COLLOCATION AGREEMENT

         THIS PHYSICAL COLLOCATION AGREEMENT ("Agreement") is made
this________day of _____________, 19___ by and between SOUTHWESTERN BELL
TELEPHONE COMPANY, a Missouri corporation ("SWBT"), and Digital Teleport, Inc.,
a [STATE OF INCORPORATION] corporation ("Interconnector").

                                   WITNESSETH

         WHEREAS, SWBT is an incumbent local exchange carrier having a statutory
duty to provide for "physical collocation" of "equipment necessary for
interconnection or access to unbundled network elements" at its premises, 47
U.S.C. 251(c)(6);

         WHEREAS, the Interconnector wishes to physically locate certain of its
equipment within the Premises (as defined herein) and connect with SWBT;

         NOW THEREFORE, in consideration of the mutual agreements and covenants
contained herein and other good and valuable consideration, the receipt and
sufficiency of which is hereby acknowledged, SWBT and the Interconnector (the
"parties") agree as follows:

                              ARTICLE I - PREMISES

         1.1 Right to Use. Subject to this Agreement, SWBT grants to
Interconnector the right to use the premises described on Exhibit____
("Premises"), attached and incorporated herein, within real property
at__________________ in the City of_________________ , County of_________
____________, State of______________________.

         1.2 Relocation. Notwithstanding Section 1.1, in the event that SWBT
determines it necessary for the Premises to be moved within the building in
which the Premises is located ("Building") or to another SWBT wire center, the
Interconnector is required to do so. In such an event, the Interconnector shall
be responsible for the preparation of the new premises at the new location if
such relocation arises from circumstances beyond the reasonable control of SWBT,
including condemnation


<PAGE>   180
                                      -2-



or government order or regulation that makes the continued occupancy of the
Premises or Building uneconomical in SWBT's sole judgment. Otherwise SWBT shall
be responsible for any such preparation.

         In the event that the Interconnector requests that the Premises be
moved within the Building or to another SWBT wire center, SWBT shall permit the
Interconnector to relocate the Premises, subject to the availability of space
and associated requirements. The Interconnector shall be responsible for all
applicable charges associated with the move, including the reinstallation of its
equipment and facilities and the preparation of the new Premises and the new
wire center as applicable.

         In either such event, the new premises shall be deemed the "Premises"
hereunder and the new wire center the "Building."

         1.3 The Premises. SWBT agrees, at the Interconnector's sole cost and
expense as set forth herein, to prepare the Premises in accordance with working
drawings and specifications entitled___________________________and
dated______________, which documents, marked Exhibit _________, are attached and
incorporated herein. The preparation shall be arranged by SWBT in compliance
with all applicable codes, ordinances, resolutions, regulations and laws. After
the Interconnector has made the initial payments required by Section 4.4 and the
state regulatory approval is obtained in accordance with Section 2.1 hereof,
SWBT agrees to pursue diligently the preparation of the Premises for use by the
Interconnector.

               ARTICLE II - EFFECTIVENESS AND REGULATORY APPROVAL

         2.1 Submission to State Commission. The effectiveness of this Agreement
is conditioned upon the unqualified approval of this Agreement, whether as a
result of an approval process or by operation of law, under 47 U.S.C. 252(a)(1).
After execution of this Agreement, the parties shall submit it to the State
commission for the State in which the Premises is located as thereby required
for approval, and shall defend the Agreement and support any reasonable effort
to have this Agreement so approved,




<PAGE>   181
                                      -3-


including the supplying of witnesses and testimony if a hearing is to be held.

         2.2 Failure to Receive Approval. In the event that this Agreement does
not receive such unqualified approval, this Agreement shall be void upon written
notice of either party to the other after such regulatory action becomes final
and unappealable. Thereafter Interconnector may request to begin negotiations
again under 47 U.S.C. 251. Alternatively, the parties may both agree to modify
this Agreement to receive such approval, but neither shall be required to agree
to any modification. Any agreement to modify shall not waive the right of either
party to pursue any appeal of the ruling made by any reviewing regulatory
commission.

         2.3 Preparation Prior to Regulatory Approval. At the written election
of the Interconnector, SWBT shall begin preparing the Premises for the
Interconnector prior to receiving the approval required by Section 2.1 hereof.
The sole evidence of such election shall be the payment to SWBT of the initial
payments specified in Sections 4.4. Payment to SWBT of the remaining charges
under these Sections shall be due upon completion. Upon such an election, this
Agreement shall become effective but only insofar as to be applicable to the
Premises preparation. In the event that the Agreement does not become fully
effective as contemplated by this Article, the Interconnector shall not be
entitled to any refund or return of any such payments beyond any portion of the
charges paid but not attributable to costs incurred by SWBT. To the extent that
SWBT has incurred preparation costs not included within any payment made by the
Interconnector, the Interconnector shall pay those costs within thirty (30) days
of notice by SWBT.

                               ARTICLE III - TERM

         3.1 Commencement Date. This Agreement shall be month-to-month,
beginning on the "Commencement Date." The "Commencement Date" shall be the first
day after this Agreement becomes effective in accordance with Article II hereof.

         3.2 Occupancy. Unless there are unusual circumstances, SWBT will notify
the Interconnector



<PAGE>   182

                                      -4-

that the Premises is ready for occupancy within _____ days after receipt of the
payments due under Sections 4.4. The Interconnector must place operational
telecommunications equipment in the Premises and connect with SWBT's network
within sixty (60) days after receipt of such notice; provided, however, that
such 60-day period shall not begin until regulatory approval is obtained under
Article II. If the Interconnector fails to do so, this Agreement is terminated
except that the Interconnector shall be liable in an amount equal to the unpaid
balance of the charges due under and, further, shall continue to be bound by
Articles II, IV, XI, XIV, XV, XVII, XVIII, XX, XXI, XXVI and XXVII hereof. For
purposes of this Section, the Interconnector's telecommunications equipment is
considered to be operational and interconnected when connected to SWBT's network
for the purpose of providing service.

                          ARTICLE IV - PREMISES CHARGES

         4.1 Monthly Charges. Beginning on the Commencement Date, Interconnector
shall pay to SWBT a charge of __________Dollars ($_______ ) per month for use of
the Premises. The monthly charge may be increased upon thirty (30) days' notice
by SWBT.

         4.2 Billing. Billing shall occur on or about the 25th day of each
month, with payment due thirty (30) days from the bill date. SWBT may change its
billing date practices upon thirty (30) days notice to the Interconnector.

         4.3 Preparation Charge. (a) The one-time charge for preparing the
Premises for use by the Interconnector is estimated to be
_________________Dollars ($XXX.XX) ("Preparation Charge"), which consists of two
components: (i) the charge to the Interconnector associated with modifying the
Building to provide physical collocation ("Common Charge"), and (ii) the charge
associated with preparing the Premises ("Premises Charge"). Of the Preparation
Charge ________ Dollars ($XXX.XX) is the estimate for subcontractor charges
("Subcontractor Charges").

         (b) SWBT will contract for and perform the construction and preparation
activities underlying the
<PAGE>   183

                                      -5-

Preparation Charge, including the Common Charge, the Premises Charge, and the
Subcontractor Charges, and any Custom Work charges, using same or consistent
practices that are used by SWBT for other construction and preparation work
performed in the Building. Subject to an appropriate non-disclosure agreement,
SWBT will permit the Interconnector to inspect supporting documents for the
Preparation Charge, including the Common Charge (if the Interconnector is the
initial physical collocator as used in Section 4.5(b)) and the Premises Charge,
and any Custom Work charge. Any dispute regarding such SWBT charges will be
subject to the dispute resolution provisions hereof.

         4.4 Payment of Premises Charge. Prior to any obligation on SWBT to
start any preparation of the Premises, the Interconnector shall pay SWBT fifty
percent (50%) of the Premises Charge and eighty-five percent (85%) of any custom
work charge required to create or vacate any entrance facility for the
Interconnector ("Custom Work"), and shall be due no later than ten (10) business
days after the Agreement has become effective in accordance with Article II
hereof. The remainder of the Premises Charge and any Custom Work charge are due
upon completion and prior to occupancy by the Interconnector.

         4.5 Payment of Common Charge. (a) In addition and prior to any
obligation on SWBT to start any preparation of the Building for physical
collocation, the Interconnector shall pay SWBT fifty percent (50%) of the Common
Charge. The other fifty percent (50%) of the Common Charge is due upon
completion and prior to occupancy by the Interconnector.

         (b) The first entity to which SWBT provides physical collocation in the
Building shall be responsible for all costs incurred by SWBT associated with the
preparation of the Building to provide physical collocation in the initial space
where physical collocation is to be located ("Initial Common Charge").
Thereafter the Initial Common Charge will be prorated and the prorated share
refunded to the previous physical collocator(s) as additional entities use
physical collocation in the Building within twelve (12) months of the first
billing date of the initial monthly charge for the first physical collocator in
the Building, using the following schedule:



<PAGE>   184
                                      -6-



  Collocator                Initial Common Charge            Refund
  ----------                ---------------------            ------
     1st                            100%                       NA
     2nd                             50%                       50%
     3rd                             33 1/3%                   16 2/3%
     4th                             25%                        8 1/3%
     5th and beyond                   0%                        0%

To the extent that a physical collocator uses a space other than such initial
space, SWBT shall refund to the Interconnector the portion of the Initial Common
Charge applicable to such collocator based on the relative use of such initial
space in a manner consistent with the above methodology and other terms of this
Agreement.

         (c) No interest will be paid on refunds. Refunds shall be based on the
Initial Common Charge actually paid by the first physical collocator.

         (d) Notwithstanding the above, SWBT shall have no obligation to remit
any amount that would result in SWBT being unable to retain the full amount of
the Initial Common Charge or to remit any amount based upon charges not actually
collected.

         4.6 Payment of Preparation Charge. SWBT is not obligated to start any
preparation of the Premises until the Interconnector pays SWBT fifty percent
(50%) of the Preparation Charge and eighty-five percent (85%) of the charges for
any Custom Work charge. Such charges shall be due no later than ten (10)
business days after the Agreement has become effective in accordance with
Article II hereof. The remainder of the Preparation Charge and any Custom Work
charge are due upon completion and prior to occupancy by the Interconnector.

         4.7 Occupancy Conditioned on Payment. SWBT shall not permit the
Interconnector to have access to the Premises for any purpose other than
inspection until SWBT is in receipt of complete payment of the Preparation
Charge and any Custom Work charges.

         4.8 Subcontractor Charges. Within one hundred twenty (120) days of the
completion date of the Premises, SWBT shall perform a true-up of all
Subcontractor Charges using the actual amounts billed by subcontractors. Any
amounts incurred above the Subcontractor Charges will be billed to the 


<PAGE>   185
                                     -7-



Interconnector or, alternatively, any amount below such Charges will be remitted
to the Interconnector.

         4.9 Breach Prior to Commencement Date. In the event that the
Interconnector materially breaches this Agreement by purporting to terminate
this Agreement after SWBT has begun preparation of the Premises but before SWBT
has been paid the entire amounts due under this Article, then in addition to any
other remedies that SWBT might have, the Interconnector shall be liable in the
amount equal to the non-recoverable costs less estimated net salvage.
Non-recoverable costs include the non-recoverable cost of equipment and material
ordered, provided or used; trued-up Subcontractor Charges, the non-recoverable
cost of installation and removal, including the costs of equipment and material
ordered, provided or used; labor; transportation and any other associated costs.

         4.10 Late Payment Charge. In the event that any charge is not paid when
due, the unpaid amounts shall bear interest in accordance with the terms and
conditions set forth in SWBT's intrastate tariff late payment provision(s)
applicable to access services for the State in which the Premises is located, or
the highest rate permitted by law, whichever is lower, from the due date until
paid.

                       ARTICLE V - INTERCONNECTION CHARGES

         5.1 Charges for interconnection shall be as set forth in any
interconnection agreement between SWBT and the interconnector and any applicable
tariffs.

              ARTICLE VI - FIBER OPTIC CABLE AND DEMARCATION POINT

         6.1 Fiber Entrances. The Interconnector shall use a single mode
dielectric fiber optic cable as a transmission medium to the Premises. The
Interconnector shall be permitted no more than two (2) entrance routes into the
Building, if available.

         6.2 Demarcation Point. SWBT shall designate the point(s) of termination
within the Building as the point(s) of physical demarcation between the
Interconnector's network and SWBT's network, with
<PAGE>   186

                                      -8-

each being responsible for maintenance and other ownership obligations and
responsibilities on its side of that demarcation point. SWBT anticipates that
the demarcation point will be within the point-of-termination frame.

                          ARTICLE VII - USE OF PREMISES

         7.1 Nature of Use. The Premises are to be used by the Interconnector
for purposes of locating equipment and facilities within SWBT's central offices
to connect with SWBT services only. Consistent with the nature of the Building
and the environment of the Premises, the Interconnector shall not use the
Premises for office, retail, or sales purposes. No signage or markings of any
kind by the Interconnector shall be permitted on the Building or on the grounds
surrounding the Building.

         7.2 Equipment List. A list of all of the Interconnector's equipment and
facilities that will be placed within the Premises is set forth on Exhibit ____,
attached and incorporated herein, with the associated power requirements, floor
loading, and heat release of each piece. The Interconnector warrants and
represents that Exhibit _____ is a complete and accurate list, and 
acknowledges that any incompleteness or inaccuracy would be a material breach 
of this Agreement. The Interconnector shall not place or leave any equipment 
or facilities within the Premises beyond those listed on Exhibit ______ 
without the express written consent of SWBT.

         7.2.1 Subsequent Requests to Place Equipment. In the event that
subsequent to the execution of this Agreement the Interconnector desires to
place in the Premises any equipment or facilities not set forth on Exhibit
_____, the Interconnector shall furnish to SWBT a written list and description
thereof substantially in the form of Attachment A, which is attached and 
incorporated. Thereafter, in its sole discretion, SWBT may provide such 
written consent or may condition any such consent on additional charges 
arising from the request, including any engineering design charges and any 
additional requirements such as power and environmental requirements for such 
listed and described equipment and/or facilities. Upon the execution by both 
parties of a final list and description, including any


<PAGE>   187
                                      -9-

applicable charges, this Agreement shall be deemed to have been amended to
include the terms and conditions of the final list and description.

         7.2.2 Limitations. The foregoing imposes no obligation upon SWBT to
purchase additional plant or equipment, relinquish used or forecasted space or
facilities, or to undertake the construction of new quarters or to construct
additions to existing quarters in order to satisfy a subsequent request for
additional space or the placement of additional equipment or facilities.

         7.3 Administrative Uses. The Interconnector may use the Premises for
placement of equipment and facilities only. The Interconnector's employees,
agents and contractors shall be permitted access to the Premises at all
reasonable times, provided that the Interconnector's employees, agents and
contractors comply with SWBT's policies and practices pertaining to fire, safety
and security. The Interconnector agrees to comply promptly with all laws,
ordinances and regulations affecting the use of the Premises. Upon the
expiration of the Agreement, the Interconnector shall surrender the Premises to
SWBT, in the same condition as when first occupied by the Interconnector,
ordinary wear and tear excepted.

         7.4 Threat to Network or Facilities. Interconnector equipment or
operating practices representing a significant demonstrable technical threat to
SWBT's network or facilities, including the Building, are strictly prohibited.

         7.5 Interference or Impairment. Notwithstanding any other provision
hereof, the characteristics and methods of operation of any equipment or
facilities placed in the Premises shall not interfere with or impair service
over any facilities of SWBT or the facilities of any other person or entity
located in the Building; create hazards for or cause damage to those facilities,
the Premises, or the Building; impair the privacy of any communications carried
in, from, or through the Building; or create hazards or cause physical harm to
any individual or the public. Any of the foregoing events would be a material
breach of this Agreement.


<PAGE>   188

                                      -10-

         7.6 Interconnection to Other Collocated Interconnectors Within the
Building. To the extent that SWBT is required by law to permit such
interconnection, SWBT will provide the connection between physical collocation
arrangements on a time and materials basis whenever the collocated
interconnectors cannot for technical reasons provide the connection for
themselves by passing the facility through the cage wall(s). SWBT will provide
nothing more than the labor and physical structure(s) necessary for the
collocator(s) to pull facilities provided by one collocator from its cage to the
cage of another collocator. If the collocators are not located on the same floor
and cannot physically pull the cable themselves through the SWBT provided
structure(s), SWBT will perform the cable pull on a time and materials basis. At
no time will the collocators be allowed access to any portion of the central
office other than the collocation area. SWBT will not make the physical
connection within the collocator's cage, SWBT will not accept any liability for
the cable or the connections and SWBT will not maintain any records concerning
these connections.

         7.7 Personality and its Removal. Subject to this Article, the
Interconnector may place or install in or on the Premises such fixtures and
equipment as it shall deem desirable for the conduct of business. Personal
property, fixtures and equipment placed by the Interconnector in the Premises
shall not become a part of the Premises, even if nailed, screwed or otherwise
fastened to the Premises, but shall retain their status as personality and may
be removed by Interconnector at any time. Any damage caused to the Premises by
the removal of such property shall be promptly repaired by Interconnector at its
expense.

         7.8 Alterations. In no case shall the Interconnector or any person
purporting to be acting through or on behalf of the Interconnector make any
rearrangement, modification, improvement, addition, repair, or other alteration
to the Premises or the Building without the advance written permission and
direction of SWBT. SWBT shall consider a modification, improvement, addition,
repair, or other alteration requested by the Interconnector, provided that SWBT
shall have the right to reject or modify 

<PAGE>   189
                                     -11-



any such request. The cost of any such construction shall be paid by
Interconnector in accordance with SWBT's then-standard custom work order
process.

                            ARTICLE VIII - STANDARDS

         8.1 Minimum Standards. This Agreement and the physical collocation
provided hereunder is made available subject to and in accordance with the (i)
Bellcore Network Equipment Building System (NEBS) Generic Requirements
(GR-63-CORE and GR-1089-CORE), as may be amended at any time and from time to
time, and any successor documents; (ii) SWBT's Technical Publication for
Physical Collocation dated ___________ ___ , 1996, as may be amended from time
to time; (iii) SWBT's Technical Publication 76300, Installation Guide, followed
in installing network equipment and facilities within SWBT central offices, as
may be amended from time to time; (iv) SWBT's Emergency Operating Procedures, as
may be amended from time to time; and (v) any statutory and/or regulatory
requirements in effect at the execution of this Agreement or that subsequently
become effective and then when effective. The Interconnector shall strictly
observe and abide by each.

         8.2 Revisions. Any revision to SWBT's Technical Publication for
Physical Collocation, its Technical Publication 76300, or its Emergency
Operating Procedures shall become effective and thereafter applicable under this
Agreement thirty (30) days after such revision is released by SWBT; provided,
however, that any revision made to address situations potentially harmful to
SWBT's network or the Premises, or to comply with statutory and/or regulatory
requirements shall become effective immediately.

         8.3 Compliance Certification. The Interconnector warrants and
represents compliance with the Bellcore Network Equipment Building System (NEBS)
Generic Requirements (GR-63-CORE and GR-1089-CORE) for each item set forth on
Exhibit____. The Interconnector also warrants and represents that any equipment
or facilities that may be placed in the Premises pursuant to Section 7.2.1 or
otherwise shall be so compliant. DISCLOSURE OF ANY NON-COMPLIANT ITEM ON


<PAGE>   190
                                      -12-

EXHIBIT _______, PURSUANT TO SECTION 7.2.1, OR OTHERWISE SHALL NOT QUALIFY THIS
ABSOLUTE CERTIFICATION IN ANY MANNER.

               ARTICLE IX - RESPONSIBILITIES OF THE INTERCONNECTOR

         9.1 Contact Number. The Interconnector is responsible for providing to
SWBT personnel a contact number for Interconnector technical personnel who are
readily accessible 24 hours a day, 7 days a week.

         9.2 Trouble Status Reports. The Interconnector is responsible for
providing trouble report status when requested by SWBT.

         9.3 Optical Fiber Extension. The Interconnector is responsible for
bringing its fiber optic cable to the wire center entrance manhole(s) designated
by SWBT, and for leaving sufficient cable length in order for SWBT to fully
extend the Interconnector-provided cable through the cable vault to the
Premises.

         9.4 Regeneration. Regeneration of either DS1 or DS3 signal levels may
be provided by the Interconnector, or SWBT under its then-standard custom work
order process, including payment requirements prior to the installation of the
regeneration equipment.

         9.5 Removal. The Interconnector is responsible for removing any
equipment, property or other items that it brings into the Premises or any other
part of the Building. If the Interconnector fails to remove any equipment,
property, or other items from the Premises within thirty (30) days after
discontinuance of use, SWBT may perform the removal and shall charge the
Interconnector for any materials used in any such removal, and the time spent on
such removal at the then-applicable hourly rate for custom work. Further, in
addition to the other provisions herein, the Interconnector shall indemnify and
hold SWBT harmless from any and all claims, expenses, fees, or other costs
associated with any such removal by SWBT.



<PAGE>   191


                                      -13-

         9.6 Interconnector's Equipment and Facilities. The Interconnector is
solely responsible for the design, engineering, testing, performance, and
maintenance of the equipment and facilities used by the Interconnector in the
Premises. The Interconnector will be responsible for servicing, supplying,
repairing, installing and maintaining the following facilities within the
Premises:

         (a) its fiber optic cable(s);

         (b) its equipment;

         (c) required point of termination cross connects;

         (d) point of termination maintenance, including replacement of fuses
and circuit breaker restoration, if and as required; and

         (e) the connection cable and associated equipment which may be required
within the Premises to the point(s) of termination.

SWBT NEITHER ACCEPTS NOR ASSUMES ANY RESPONSIBILITY WHATSOEVER IN ANY OF THESE
AREAS.

         9.7 Verbal Notifications Required. The Interconnector is responsible
for immediate verbal notification to SWBT of significant outages or operations
problems which could impact or degrade SWBT's network, switches, or services,
and for providing an estimated clearing time for restoral. In addition, written
notification must be provided within twenty-four (24) hours.

         9.8 Service Coordination. The Interconnector is responsible for
coordinating with SWBT to ensure that services are installed in accordance with
the service request.

         9.9 Testing. The Interconnector is responsible for testing, to identify
and clear a trouble when the trouble has been isolated to an
Interconnector-provided facility or piece of equipment. If SWBT testing is also
required, it will be provided at charges specified in SWBT's F.C.C. No. 73,
Section 13.

                           ARTICLE X - QUIET ENJOYMENT

         Subject to the other provisions hereof, SWBT covenants that it has full
right and authority to



<PAGE>   192
                                      -14-


permit the use of the Premises by the Interconnector and that, so long as the
Interconnector performs all of its obligations herein, the Interconnector may
peaceably and quietly enjoy the Premises during the term hereof.

                             ARTICLE XI - ASSIGNMENT

         The Interconnector shall not assign or otherwise transfer this
Agreement, neither in whole nor in part, or permit the use of any part of the
Premises by any other person or entity, without the prior written consent of
SWBT. Any purported assignment or transfer made without such consent shall be
voidable at the option of SWBT. The Interconnector shall not permit any third
party to jointly occupy the Premises.

                           ARTICLE XII - CASUALTY LOSS

         12.1   Damage to Premises.  If the Premises are damaged by fire or
other casualty, and

         (i)      The Premises are not rendered untenantable in whole or in
                  part, SWBT shall repair the same at its expense (as hereafter
                  limited) and the rent shall not be abated, or

         (ii)     The Premises are rendered untenantable in whole or in part and
                  such damage or destruction can be repaired within ninety (90)
                  days, SWBT has the option to repair the Premises at its
                  expense (as hereafter limited) and rent shall be
                  proportionately abated while Interconnector was deprived of
                  the use. If the Premises cannot be repaired within ninety (90)
                  days, or SWBT opts not to rebuild, then this Agreement shall
                  (upon notice to the Interconnector within thirty (30) days
                  following such occurrence) terminate as of the date of such
                  damage.

Any obligation on the part of SWBT to repair the Premises shall be limited to
repairing, restoring and rebuilding the Premises as originally prepared for the
Interconnector and shall not include any obligation to repair, restore, rebuild
or replace any alterations or improvements made by the



<PAGE>   193

                                      -15-

Interconnector or by SWBT on request of the Interconnector; or any fixture or
other equipment installed in the Premises by the Interconnector or by SWBT on
request of the Interconnector.

         12.2 Damage to Building. In the event that the Building shall be so
damaged by fire or other casualty that closing, demolition or substantial
alteration or reconstruction thereof shall, in SWBT's opinion, be advisable,
then, notwithstanding that the Premises may be unaffected thereby, SWBT, at its
option, may terminate this Agreement by giving the Interconnector ten (10) days
prior written notice within thirty (30) days following the date of such
occurrence, if at all possible.

                             ARTICLE XIII - RE-ENTRY

         If the Interconnector shall default in performance of any agreement
herein, and the default shall continue for thirty (30) days after receipt of
written notice, or if the Interconnector is declared bankrupt or insolvent or
makes an assignment for the benefit of creditors, SWBT may, immediately or at
any time thereafter, without notice or demand, enter and repossess the Premises,
expel the Interconnector and any claiming under the Interconnector, remove the
Interconnector's property, forcibly if necessary, and thereupon this Agreement
shall terminate, without prejudice to any other remedies SWBT might have.

         SWBT may also refuse additional applications for service and/or refuse
to complete any pending orders for additional space or service by the
Interconnector at any time thereafter.

                      ARTICLE XIV - LIMITATION OF LIABILITY

         14.1 Limitation. With respect to any claim or suit for damages arising
in connection with the mistakes, omissions, interruptions, delays or errors, or
defects in transmission occurring in the course of furnishing service hereunder,
the liability of SWBT, if any, shall not exceed an amount equivalent to the
proportionate monthly charge to the Interconnector for the period during which
such mistake, omission, interruption, delay, error, or defect in transmission or
service occurs and continues. 


<PAGE>   194
                                     -16-



However, any such mistakes, omissions, interruptions, delays, errors, or defects
in transmission or service which are caused or contributed to by the negligence
or willful act of the Interconnector or which arise in connection with the use
of the Interconnector-provided facilities or equipment shall not result in the
imposition of any liability whatsoever upon SWBT.

         Neither party shall be responsible to the other for any indirect,
special, consequential, lost profit, or punitive damages, whether in contract or
tort.

         Each party shall be indemnified and held harmless by the other against
claims and damages by any third party arising from provision of the other
party's services or equipment except those claims and damages directly
associated with the provision of services to the other party which are governed
by the provisioning party's applicable tariffs.

         Neither party shall have any liability whatsoever to the customers of
the other party for claims arising from the provision of the other party's
service to its customers, including claims for interruption of service, quality
of service or billing disputes.

         The liability of either party for its willful misconduct, if any, is
not limited by this Agreement. With respect to any other claim or suit, by a
customer or by any others, for damages associated with the installation,
provision, preemption, termination, maintenance, repair or restoration of
service, SWBT's liability, if any, shall not exceed an amount equal to the
proportionate monthly charge for the affected period.

         SWBT shall not be liable for any act or omission of any other carrier
or customer providing a portion of a service, nor shall SWBT for its own act or
omission hold liable any other carrier or customer providing a portion of a
service.

         When the Interconnector is provided service under this Agreement, SWBT
shall be indemnified, defended and held harmless by the Interconnector against
any claim, loss or damage arising from the customer's use of services offered
under this Agreement, involving:

         (1)      Claims for libel, slander, invasion of privacy, or
                  infringement of copyright arising from
<PAGE>   195

                                      -17-

                  the customer's own communications;

         (2)      Claims for patent infringement arising from the customer's
                  acts combining or using the service furnished by SWBT in
                  connection with facilities or equipment furnished by the
                  customer; or

         (3)      All other claims arising in connection with any act or
                  omission of the Interconnector in the course of using services
                  provided pursuant to this Agreement.

         14.2 Third Parties. The Interconnector acknowledges and understands
that SWBT may provide space in or access to the Building to other persons or
entities ("Others"), which may include competitors of Interconnectors; that such
space may be close to the Premises, possibly including space adjacent to the
Premises and/or with access to the outside of the Premises; and that the cage
around the Premises is a permeable boundary that will not prevent the Others
from observing or even damaging the Interconnector's equipment and facilities.
In addition to any other applicable limitation, SWBT shall have absolutely no
liability with respect to any action or omission by any Other, regardless of the
degree of culpability of any such Other or SWBT, and regardless of whether any
claimed SWBT liability arises in tort or in contract. The Interconnector shall
save and hold SWBT harmless from any and all costs, expenses, and claims
associated with any such acts or omission by any Other acting for, through, or
as a result of the Interconnector.

                       ARTICLE XV- INDEMNIFICATION OF SWBT

         In addition to any other provision hereof, the Interconnector agrees to
indemnify, defend and save harmless SWBT (including its officers, directors,
employees, and other agents) from any and all claims, liabilities, losses,
damages, fines, penalties, costs, attorney's fees or other expenses of any kind,
arising in connection with Interconnector's use of the Premises, conduct of its
business or any activity, in or about the Premises, performance of any terms of
this Agreement, or any act or omission of the Interconnector (including its
officers, directors, employees, agents, contractors, servants, 
<PAGE>   196
                                     -18-


invitees, or licensees). Defense of any claim shall be reasonably satisfactory
to SWBT.

          ARTICLE XVI - SERVICES, UTILITIES, MAINTENANCE AND FACILITIES

         16.1 Operating Services. SWBT, at its sole cost and expense, shall
maintain for the Building customary building services, utilities (excluding
telephone facilities), including janitor and elevator services, 24 hours a day.
The Interconnector shall be permitted to have a single-line business telephone
service for the Premises subject to applicable SWBT tariffs.

         16.2 Utilities. SWBT will provide negative DC and AC power, back-up
power, heat, air conditioning and other environmental support necessary for the
Interconnector's equipment, in the same manner that it provides such support
items for its own equipment within that wire center.

         16.3 Maintenance. SWBT shall maintain the exterior of the Building and
grounds, and all entrances, stairways, passageways, and exits used by the
Interconnector to access the Premises.

         16.4 Legal Requirements. SWBT agrees to make, at its expense, all
changes and additions to the Premises required by laws, ordinances, orders or
regulations of any municipality, county, state or other public authority
including the furnishing of required sanitary facilities and fire protection
facilities, except fire protection facilities specially required because of the
installation of telephone or electronic equipment and fixtures in the Premises.

            ARTICLE XVII - LIMITATION OF ACTIONS; DISPUTE RESOLUTION

         17.1 Finality of Disputes. No claim arising from this Agreement shall
be brought more than twenty-four (24) months from the date of occurrence which
gives rise to the claim.

         17.2 Alternative to Litigation. The parties desire to resolve disputes
arising in connection with this Agreement without litigation. Accordingly,
except for action seeking a temporary restraining order or an injunction related
to the purposes of this Agreement, or suit to compel compliance with this
dispute resolution process, the parties agree to use the following alternative
dispute resolution 




<PAGE>   197
                                      -19-

procedure as their sole remedy with respect to any controversy or claim arising
from or relating to this Agreement.

         17.3 Resolution of Disputes Between Parties. At the written request of
a party, each party will appoint a knowledgeable, responsible representative to
meet and negotiate in good faith to resolve any dispute arising under this
Agreement. The location, form, frequency, duration and conclusion of these
discussions shall be left to the discretion of the representatives. Upon
agreement, the representatives may use other alternative dispute resolution
procedures, such as mediation, to assist in the negotiations. Discussions and
correspondence among the representatives for purposes of settlement, exempt from
discovery and production, shall not be admissible in the arbitration described
below or in any lawsuit without the concurrence of all parties. Documents
identified in or provided with such communications, which are not prepared for
purposes of the negotiations, are not so exempted and, if otherwise admissible,
may be admitted in evidence in the arbitration or lawsuit.

         17.4 Arbitration. If the negotiations do not resolve the dispute within
sixty (60) days of the initial written request, the dispute shall be submitted
to binding arbitration by a single arbitrator pursuant to the Commercial
Arbitration Rules of the American Arbitration Association. A Party may demand
such arbitration in accordance with the procedures set forth in those rules.
Discovery shall be controlled by the arbitrator and shall be permitted only to
the extent set forth in this Section. Each party may submit in writing to the
other party, and the receiving party shall so respond, to a maximum of any
combination of thirty-five (35) (none of which may have subparts) of the
following:

         (a) Interrogatories

         (b) Demands to produce documents

         (c) Requests for admission

Additional discovery may be permitted upon mutual agreement of the parties. The
arbitration hearing shall be commenced within sixty (60) days of the demand for
arbitration. The arbitration shall be held in____________________. The
arbitrator shall control the scheduling so as to process the matter
<PAGE>   198

                                      -20-

expeditiously. The parties shall submit written briefs five days before the
hearing. The arbitrator shall rule on the dispute by issuing a written opinion
within thirty (30) days after the close of hearings. The arbitrator has no
authority to order consequential damages. The times specified in this section
may be extended upon mutual agreement of the parties or by the arbitrator upon a
showing of good cause. Judgment upon the award rendered by the arbitrator may be
entered in any court having jurisdiction.

         17.5 Costs. Each party shall bear its own costs of these procedures. A
party seeking discovery shall reimburse the responding party the costs of
production of documents (including search time and reproduction costs). The
parties shall equally split the fees of the arbitration and the arbitrator.

                        ARTICLE XVIII - SUCCESSORS BOUND

         Without limiting Article XI hereof, the conditions and agreements
contained herein shall bind and inure to the benefit of SWBT, the Interconnector
and their respective successors and, except as otherwise provided herein,
assigns.

                       ARTICLE XIX - CONFLICT OF INTEREST

         The Interconnector represents that no employee or agent of SWBT has
been or will be employed, retained, paid a fee, or otherwise has received or
will receive any personal compensation or consideration from the Interconnector,
or any of the Interconnector's employees or agents in connection with the
arranging or negotiation of this Agreement or associated documents.

                       ARTICLE XX - NON-EXCLUS1VE REMEDIES

         No remedy herein conferred upon is intended to be exclusive of any
other remedy in equity, provided by law, or otherwise, but each shall be in
addition to every other such remedy.


<PAGE>   199

                                      -21-

                              ARTICLE XXI - NOTICES

         Except as may be specifically permitted in this Agreement, any notice,
demand, or payment required or desired to be given by one party to the other
shall be in writing and shall be valid and sufficient if dispatched by
registered or certified mail, return receipt requested, postage prepaid, in the
United States mails, or by facsimile transmission; provided, however, that
notices sent by such registered or certified mail shall be effective on the
third business day after mailing and those sent by facsimile transmission shall
only be effective on the date transmitted if such notice is also sent by such
registered or certified mail no later than the next business day after
transmission, all addressed as follows:

If to SWBT:

     Jeffrey Fields
     One Bell Plaza, 525.07
     Dallas, Texas 75202

If to the Interconnector:

     Richard Weinstein
     11111 Dorsett Road
     St. Louis, Missouri 63043

Either party hereto may change its address by written notice given to the other
party hereto in the manner set forth above.

                       ARTICLE XXII - COMPLIANCE WITH LAWS

         The Interconnector and all persons acting through or on behalf of the
Interconnector shall comply with the provisions of the Fair Labor Standards Act,
the Occupational Safety and Health Act, and all other applicable federal, state,
county, and local laws, ordinances, regulations and codes (including


<PAGE>   200


                                      -22-

identification and procurement of required permits, certificates, approvals and
inspections) in its performance hereunder. The Interconnector further agrees
during the term of this Agreement to comply with all applicable Executive and
Federal regulations as set forth in SW9368, attached as Exhibit____ and
incorporated herein, as may be modified from time to time.

                         ARTICLE XXIII - OSHA STATEMENT

         The Interconnector, in recognition of SWBT's status as an employer,
agrees to abide by and to undertake the duty of compliance on behalf of SWBT
with all federal, state and local laws, safety and health regulations relating
to the Premises which the Interconnector has assumed the duty to maintain
pursuant to this Agreement, and to indemnify and hold SWBT harmless for any
judgments, citations, fines, or other penalties which are assessed against SWBT
as the result of the Interconnector's failure to comply with any of the
foregoing. SWBT, in its status as an employer, shall comply with all federal,
state and local laws, safety and health standards and regulations with respect
to the structural and those other portions of the Premises which SWBT has agreed
to maintain pursuant hereto.

                            ARTICLE XXIV - INSURANCE

         24.1 Coverage Requirements. The Interconnector shall, at its sole cost
and expense procure, maintain, pay for and keep in force the following insurance
coverage and any additional insurance and/or bonds required by law and
underwritten by insurance companies having a BEST Insurance rating of A+VII or
better, and which is authorized to do business in the jurisdiction in which the
Premises are located. SWBT shall be named as an ADDITIONAL INSURED on general
liability policy.

         (1)      Comprehensive General Liability insurance including
                  Products/Completed Operations Liability insurance including
                  the Broad Form Comprehensive General Liability endorsement (or
                  its equivalent(s)) with a Combined Single limit for Bodily
                  Injury and 
<PAGE>   201

                                      -23-

                  Property Damage of $1,000,000. Said coverage shall include the
                  contractual, independent contractors products/completed
                  operations, broad form property, personal injury and fire
                  legal liability.

         (2)      If use of an automobile is required or if the Interconnector
                  is provided or otherwise allowed parking space by SWBT in
                  connection with this Agreement, automobile liability insurance
                  with minimum limits of $1 million each accident for Bodily
                  Injury, Death and Property Damage combine. Coverage shall
                  extend to all owned, hired and non-owned automobiles. The
                  Interconnector hereby waives any rights of recovery against
                  SWBT for damage to the Interconnector's vehicles while on the
                  grounds of the Building and the Interconnector will hold SWBT
                  harmless and indemnify it with respect to any such damage or
                  damage to vehicles of the Interconnector's employees,
                  contractors, invitees, licensees or agents.

         (3)      Workers' Compensation insurance with benefits afforded in
                  accordance with the laws of the state in which the space is to
                  be provided.

         (4)      Employer's Liability insurance with minimum limits of $100,000
                  for bodily injury by accident, $100,000 for bodily injury by
                  disease per employee and $500,000 for bodily injury by disease
                  policy aggregate.

         (5)      Umbrella/Excess liability coverage in an amount of $5 million
                  excess of coverage specified above.

         (6)      All Risk Property coverage on a full replacement cost basis
                  insuring all of the Interconnector's personal property
                  situated on or within the Building or the Premises. The
                  Interconnector releases SWBT from and waives any and all right
                  of recovery, claim, action or cause of action against SWBT,
                  its agents, directors, officers, employees, independent
                  contractors, and other representatives for any loss or damage
                  that may occur to equipment or any other personal property
                  belonging to Interconnector or located on or in the space at
<PAGE>   202
                                      -24-

                  the instance of the Interconnector by reason of fire or water
                  or the elements or any other risks would customarily be
                  included in a standard all risk casualty insurance policy
                  covering such property, regardless of cause or origin,
                  including negligence of SWBT, its agents, directors, officers,
                  employees, independent contractors, and other representatives.
                  Property insurance on the Interconnector's fixtures and other
                  personal property shall contain a waiver of subrogation
                  against SWBT, and any rights of the Interconnector against
                  SWBT for damage to the Interconnector's fixtures or personal
                  property are hereby waived.

The Interconnector may also elect to purchase business interruption and
contingent business interruption insurance, knowing that SWBT has no liability
for loss of profit or revenues should an interruption of service occur.

         24.2 Coverage Increases. The limits set forth in Section 24.1 may be
increased by SWBT from time to time during the term of occupancy to at least
such minimum limits as shall then be customary in respect of comparable
situations within the existing SWBT buildings.

         24.3 Primary Coverage. All policies purchased by the Interconnector
shall be deemed to be primary and not contributing to or in excess of any
similar coverage purchased by SWBT.

         24.4 Effective Date. All insurance must be in effect on or before
occupancy date and shall remain in force as long as any of the Interconnector's
facilities or equipment remain within the Premises or the Building. If the
Interconnector fails to maintain the coverage, SWBT may pay the premiums thereon
and, if so, shall be reimbursed by the Interconnector.

         24.5 Supporting Documentation. The Interconnector shall submit
certificates of insurance and copies of policies reflecting the coverages
specified above prior to the commencement of the work called for in this
Agreement. The Interconnector shall arrange for SWBT to receive thirty (30) days
advance written notice from the Interconnector's insurance company(ies) of
cancellation, non-renewal or substantial alteration of its terms.
<PAGE>   203
                                      -25-


         24.6 Carrier Recommendations. The Interconnector must also conform to
the recommendation(s) made by SWBT's Property Insurance Company which
Interconnector has already agreed to or to such recommendations as it shall
hereafter agree to.

         24.7 Material Breach. Failure to comply with the provisions of this
section will be deemed a material violation of this Agreement.

                      ARTICLE XXV - SWBT'S RIGHT OF ACCESS

         SWBT, its agents, employees, and other SWBT-authorized persons shall
have the right to enter the Premises at any reasonable time to examine its
condition, make repairs required to be made by SWBT hereunder, and for any other
purpose deemed reasonable by SWBT. SWBT may access the Premises for purpose of
averting any threat of harm imposed by the Interconnector or its equipment or
facilities upon the operation of SWBT equipment, facilities and/or personnel
located outside of the Premises. If routine inspections are required, they shall
be conducted at a mutually agreeable time.

                  ARTICLE XXVI - PURPOSE AND SCOPE OF AGREEMENT

         Through this Agreement, the Interconnector is placing
telecommunications equipment and facilities on SWBT property for the purpose of
connecting with SWBT's network only. The parties agree that this Agreement does
not constitute, and shall not be asserted to constitute, an admission or waiver
or precedent with any State commission, the Federal Communications Commission,
any other regulatory body, any State or Federal Court, or in any other form that
SWBT has agreed or acquiesced that any piece of Interconnector equipment or
facility is "equipment necessary for interconnection or access to unbundled
network elements" under 47 U.S.C. 251(c)(6).

                          ARTICLE XXVII - MISCELLANEOUS

         27.1 Exhibits   The following Exhibits are attached hereto and made 
                         part hereof:

                         Exhibit__________
<PAGE>   204
                                      -26-
    
                         Exhibit__________

                         Exhibit__________

                         Exhibit__________

         27.2 Variations. In the event of variation or discrepancy between any
duplicate originals hereof, including exhibits, the original Agreement held by
SWBT shall control.

         27.3 Governing Law. This Agreement shall be governed by the laws of the
State in which the Premises are located, without regard to the choice of law
principles thereof.

         27.4 Joint and Several. If Interconnector constitutes more than one
person, partnership, corporation, or other legal entities, the obligation of all
such entities under this Agreement is joint and several.

         27.5 Future Negotiations. SWBT may refuse requests for additional space
in the Building or in any other SWBT premises if the Interconnector is in
material breach of this Agreement, including having any past due charges
hereunder. In any and each such event, the Interconnector hereby releases and
shall hold SWBT harmless under Article XV from any duty to negotiate with the
Interconnector or any of its affiliates for any additional space or physical
collocation.

         27.6 Severability. With the exception of the requirements, obligations,
and rights set forth in Article II hereof, if any of the provisions hereof are
otherwise deemed invalid, such invalidity shall not invalidate the entire
Agreement, but rather the entire Agreement shall be construed as if not
containing the particular invalid provision(s), and the rights and obligations
of SWBT and the Interconnector shall be construed accordingly.

         27.7 Paragraph Headings and Article Numbers. The headings of the
articles and paragraphs herein are inserted for convenience only and are not
intended to affect the meaning or interpretation of this Agreement.

         27.8 Entire Agreement. This Agreement with the attached schedules and
exhibits, and referenced documentation and materials attached hereto set forth
the entire understanding of the parties and 


<PAGE>   205
                                      -27-


supersedes all prior agreements, arrangements and understandings relating to
this subject matter and may not be changed except in writing by the parties;
provided, however, that this provision shall not affect current or pending
tariffs, under investigation or otherwise, including any charges due thereunder.
No representation, promise, inducement or statement of intention has been made
by either party which is not embodied herein, and there are no other oral or
written understandings or agreements between the parties relating to the subject
matter hereof except as may be referenced herein.

         27.9 No Third Party Beneficiaries. Nothing in this Agreement is
intended, nor shall be deemed, to confer any rights or remedies upon any person
or legal entity not a party hereto.

         27.10 Construction. This Agreement shall be interpreted and governed
without regard to which party drafted this Agreement.

         27.11 Multiple Originals. This Agreement may be executed in multiple
copies, each of which shall be deemed an original.

         27.12 Wavier of Obligations. (a) Whenever this Agreement requires the
consent of a party, any request for such consent shall be in writing.

         (b) Neither party shall be deemed to have waived or impaired any right,
authority, or option reserved by this Agreement (including the right to demand
exact compliance with every term, condition and covenant herein, or to declare
any breach hereof to be a default and to terminate this Agreement prior to the
expiration of its term), by virtue of any custom or practice of the parties at
variance with the terms hereof or any failure, refusal or neglect to exercise
any right under this Agreement or to insist upon exact compliance by the other
with its obligations hereunder, including any rule or procedure, or any waiver,
forbearance, delay, failure or omission by SWBT to exercise any right, power or
option, whether of the same, similar or different nature, with respect to one or
more other interconnectors.

         27.13 Rights Cumulative. The rights of a party hereunder are cumulative
and no exercise or 


<PAGE>   206

                                      -28-


enforcement by such party of any right or remedy hereunder
shall preclude the exercise or enforcement of any other right or remedy
hereunder or to which such party is entitled to enforce.

         27.14 Binding Effect. (a) This Agreement is binding upon the parties
hereto, their respective executors, administrators, heirs, assigns and
successors in interest.



<PAGE>   207
                                      -29-


         (b) All obligations by either party which expressly or by their nature
survive the expiration or termination of this Agreement shall continue in full
force and effect subsequent to and notwithstanding its expiration or termination
and until they are satisfied in full or by their nature.

         27.15 Impossibility of Performance. Neither party shall be liable for
loss or damage or deemed to be in breach of this Agreement if its failure to
perform its obligations results from: (a) compliance with any law, ruling,
order, regulation, requirement or instruction of any federal, state or municipal
government or any department or agency thereof or court of competent
jurisdiction; (b) acts of God; (c) acts of omissions of the other party; (d)
fires, strikes, labor difficulties, embargoes, war, insurrection or riot; or any
other intervening act beyond the reasonable control of the party claiming such a
delay. Any delay resulting from any of said causes shall extend performance
accordingly or excuse performance, in whole or in part, as may be reasonable. In
any such event, the Interconnector's employees, authorized agents and
contractors will comply with the Emergency Operating Procedures established by
SWBT.

         27.16 Survival. The terms, provisions, representations, and warranties
contained in this Agreement that by their nature and/or context are intended to
survive the performance thereof by either or both parties hereunder shall so
survive the completion of performances and termination of this Agreement,
including the making of any and all payments due hereunder.

         IN WITNESS WHEREOF, the duly authorized representatives of the parties
have executed and delivered this Agreement as of the day and year first above
written.




<PAGE>   208

                                      -30-

            THIS AGREEMENT CONTAINS A BINDING ARBITRATION AGREEMENT.

SOUTHWESTERN BELL TELEPHONE COMPANY



By:______________________

Title:___________________


DIGITAL TELEPORT, INC.



By:______________________

Title:___________________



<PAGE>   209
                                      -31-

                                  ATTACHMENT A

Southwestern Bell Telephone Company
[ADDRESS AND TO THE ATTENTION OF PER NOTICE PROVISION]

RE:      [REFERENCE IDENTIFIER ON COVER SHEET]

         Pursuant to the referenced Physical Collocation Agreement
("Agreement"), this letter constitutes a request to place the following
additional equipment and/or facilities in the Premises:


 Generic Name      # of Bays    Floor Loading    Power Req.     Heat Release
 ------------      ---------    -------------    ----------     ------------

         If this request is acceptable to Southwestern Bell Telephone Company
("SWBT"), please indicate that acceptance by executing both originals and
returning one to the undersigned. With the return of an executed original, the
Agreement shall be deemed amended to reflect that the listed equipment and
facilities may be located in the Premises. In all other respects, the Agreement
shall be unaffected.

         If not acceptable, please let me know of SWBT's objections or
conditions to its acceptance.

         All capitalized terms not defined in this letter but defined in the
Agreement shall have the meaning ascribed to such term in the Agreement.

                                        DIGITAL TELEPORT, INC.


                                        By:_________________________

                                        Title:______________________

                                        Name:_______________________


AGREED AND ACCEPTED:

SOUTHWESTERN BELL TELEPHONE
 COMPANY


By:______________________

Title:___________________

Name:____________________

Date:____________________



<PAGE>   210


                                                                  APPENDIX SS7
                                                                  PAGE 2 OF 12



                                  APPENDIX SS7


                          APPENDIX FOR THE PROVISION OF
                                   SS7 SERVICE

This Appendix sets forth the terms and conditions under which SWBT shall provide
to LSP certain Common Channel Signaling/Signaling System 7(CCS/SS7) services,
herein referred to as "SS7 Service".

This Appendix provides for the use of the SWBT Common Channel Signaling network,
which uses the Signaling System 7 (SS7) protocol, and for a Dedicated Signaling
Link, which provides network interconnection to SWBT's Signal Transfer Point
(STPs), including facilities. SS7 Service provides CCS/SS7 functionality and
translations to support SS7 based services and applications as they become
available and as facilities permit.

SS7 Service includes the screening of messages based on origination signaling
point code and the routing of messages by a SWBT mated pair of STPs. Any
services beyond SS7 Transport, Use of the STP or a Dedicated Signaling Link
interconnection (e.g. Local and IntraLATA Call Set-Up Signaling, Interexchange
Carrier (IXC) Call Set-Up Signaling, Easy Options(SM), 800 Data Base Access, and
Line Information Data Base (LIDB) Validation Service Access) will be provided by
an amendment to this appendix, by a separate agreement, or by tariff, whichever
is applicable. Arrangements for services should be made through the LSP Service
Center of SWBT.

I.       SERVICE DESCRIPTION

         A.       SS7 TRANSPORT

                  SS7 Transport provides for the routing and screening of SS7
                  messages from a SWBT pair of STPs (i.e. a mated pair) to
                  another SWBT pair of STPs. The screening of messages provides
                  for LSP designation of signaling points associated with the
                  LSP and controls which messages may be allowed or not allowed
                  by the SWBT STP pairs. The routing of messages provides for
                  the transfer of a complete message between signaling links,
                  and for a Global Title Translation of the message address, if
                  needed.

                  SS7 Transport provides routing of messages for all parts of
                  the SS7 protocol including, for example, Message Transfer Part
                  (MTP) messages, Integrated Services Digital Network User Part
                  (ISDNUP or ISUP) messages, Signaling Connection and Control
                  Part (SCCP) messages, Transaction Capability 


<PAGE>   211
                                                                  APPENDIX SS7
                                                                  PAGE 3 OF 12



                  Application Part (TCAP) messages and Operations and
                  Maintenance Application Part (OMAP) messages.

                  SS7 Transport provides for screening and routing of signaling
                  messages based on the SS7 protocol. These messages may support
                  other applications and services such as, for example, Easy
                  Option[graphic] (referred to as Call Control Option[graph] or
                  Bellcore CLASS[graphic]) services, Message Waiting services,
                  Toll Free Database services, Line Information Data Base (LIDB)
                  Services, Calling Name (CNAM) Datsun services, Advanced
                  Intelligent Network (AIN) services and Telecommunications
                  Industry Association Interim Standard-41 (IS-41) services. SS7
                  Transport will route messages to the global title address or
                  to the signaling point code address of the message based on
                  the translation information of SWBT's STP.

                  SS7 Transport provides screening and routing of messages that
                  are generated by the action of the LSP signaling point, or
                  messages that are generated by a signaling point connected via
                  the LSP signaling point.

         B.       DEDICATED SIGNALING LINKS

                  Dedicated Signaling Links provide physical access to SWBT's
                  signaling network. The links are fully dedicated to the use of
                  LSP and provide the screening and routing usage for the SWBT
                  STP to which the link is connected. Dedicated signaling links
                  are provided as a set of links connecting to a SWBT mated pair
                  of STPs. Dedicated Signaling Links are dedicated two-way
                  digital data circuits that interconnect SWBT's STP locations
                  and the LSP's Signaling Points at Signaling Point of Interface
                  (SPOI) locations. Dedicated Signaling Links are available to
                  LSPs for their use in furnishing SS7-based services or
                  applications to their end users or other users of SS7
                  signaling information.

                  Dedicated Signaling Links include the following elements:

         1.       SS7 Link Cross Connect: The SS7 Link Cross Connect provides a
                  DS-0A or DS1 connection and access point for testing in the
                  SWBT STP building. The cross connect connects the STP Port
                  Termination to an LSP unbundled dedicated transport or to a
                  collocation cage.

         2.       STP Port Termination: The STP Port Termination is the physical
                  termination of the signaling link (i.e. 56 kbps circuit) at a
                  SWBT STP. An STP Port Termination is used for each 56 kbps SS7
                  Link Cross Connect terminated at a SWBT STP.

                  The STP Port Termination shall provide for the use of the SWBT
                  STP to which the port is connected.
<PAGE>   212
                                                                  APPENDIX SS7
                                                                  Page 4 of 12



                  The LSP shall provide the portion of the signaling link from
                  the LSP premises within the LATA to the SWBT STP location
                  using unbundled dedicated transport. LSP shall notify SWBT
                  that the facility contains a signaling link service. Multiple
                  facilities provided by SWBT will be identified so that SWBT
                  may maintain facility diversity between links and linksets
                  that require diversity. LSP shall identify the DSI or channel
                  of a DS1 that will be used for the signaling link.

                  If LSP does not use an unbundled dedicated transport facility
                  to LSP premises, LSP shall identify that the SS7 Link Cross
                  Connect shall connect to a LSP collocation cage in the SWBT
                  STP building.

                  When LSP uses an alternative DS1 facility or arranges, or
                  agrees to allow, a physical degree of diversity or performance
                  that is not in accordance with the specifications of Bellcore,
                  GR-905-CORE, LSP acknowledges that the performance and
                  reliability of the SS7 protocol may be affected and the
                  performance and reliability standards described in GR-905-CORE
                  may be disqualified.

                  Dedicated Signaling Links are subject to SWBT compatibility
                  testing and certification requirements per the Network
                  Operations Forum Reference Document, per Bellcore, GR-905-CORE
                  and per SWBT Technical Publication, TP76638. First
                  interconnections to the SWBT signaling network per LSP and per
                  signaling point type of equipment will require pre-ordering
                  meetings to exchange information and schedule testing for
                  certification by SWBT.

         C.       USE OF THE STP

                  The Use of the STP provides for the use of the SWBT SS7
                  signaling network when LSP uses the SWBT Local Switching
                  Unbundled Network Element. The Use of the STP provides for the
                  use of the signaling link between the SWBT local switch and
                  the STP, the use of the signaling link and ports between the
                  SWBT tandem switch and the STP when applicable, the use of the
                  SWBT STP port and use of STP Transport. The Use of the STP is
                  a signaling network element incurred by use of the SWBT local
                  switching (i.e. Unbundled Local Switching). The Use of the STP
                  provides the SWBT signaling when LSP subscribers originate and
                  terminate calls from a SWBT SS7 equipped end office.

II.      DEFINITIONS

         Attachment 1, which is attached hereto and made a part hereof, contains
         DEFINITIONS OF TERMS in this Appendix.


<PAGE>   213

                                                                  APPENDIX SS7
                                                                  Page 5 of 12


III.     MANNER OF PROVISIONING

         A.       SS7 TRANSPORT

                  LSP shall use SS7 Transport subject to the screening and
                  routing information of the SWBT STPs. SWBT shall provide
                  information to LSP on the routes and signaling point codes
                  served by the SWBT STPs.

                  SS7 Transport shall route ISUP messages for the purpose of
                  establishing trunk voice paths between switching machines.
                  Routes requiring ISUP routes longer than two SWBT STP pairs
                  may be provisioned pursuant to Attachment Network Element Bona
                  Fide Request per specific LSP request, if such route is
                  technically feasible. However, routes involving signaling
                  point codes not associated with LSP are subject to the route
                  designated by the owner of the SPC.

                  SS7 Transport shall route TCAP queries when feasible per the
                  SS7 Protocol to the SWBT "regional" STP pair that directly
                  serves the database of TCAP message. SS7 Transport shall route
                  TCAP responses from a SWBT "regional" STP pair to another SWBT
                  STP pair.

                  When LSP requires modification of SWBT's SS7 Service
                  components not otherwise provided in this contract, the
                  modifications may be furnished pursuant to Attachment Network
                  Element Bona Fide Request.

                  SS7 Transport provides a signaling route for messages only to
                  signaling points to which SWBT has a route. SS7 Transport does
                  not include the provision of a signaling route to every
                  possible signaling point. When SWBT does establish a route to
                  a signaling point in a mated pair of STPs, the route may not
                  be available to other SWBT pairs of STPs, until ordered. When
                  SWBT or LSP, pursuant to a service order, arranges to
                  establish a route to a signaling point, such route to the
                  other signaling point or other signaling network will be used
                  by all signaling points within and connected to the SWBT
                  signaling network per the standard requirements of the SS7
                  protocol.

                  Disputes concerning the association of a signaling point among
                  specific link sets associated with a SWBT mated STP will be
                  resolved by consultation with the signaling point owner, as
                  defined in the Local Exchange Routing Guide (LERG), Section 1,
                  assignment of Signaling Point Codes.

         B.       DEDICATED SIGNALING LINKS

                  LSP shall designate the signaling points and signaling point
                  codes associated with LSP. LSP shall provide information to
                  SWBT to allow SWBT to translate 
<PAGE>   214

                                                                  APPENDIX SS7
                                                                  Page 6 of 12



                  SWBT STPs. The information shall define the screening and
                  routing information for the signaling point codes of LSP. This
                  information may include global title address, translation type
                  and subsystem designations as needed.

         Signaling links from SWBT mated pairs of STPs shall connect to LSP
         premises (including collocation locations) within the same LATA. A set
         of links can be either:

         1.       "A" Link Sets from LSP's Signaling Point (SP)/Service
                  Switching Point (SSP). A minimum of two links will be
                  required, one from the SP/SSP to each STP; or,

         2.       "B" Link Sets from LSP's STPs that are connected to SWBT's
                  mated pair of STPs. A minimum of four links will be required
                  (i.e., a "quad") between the two pairs of STPs. (This same
                  arrangement is sometimes referred to as a set of "D" links.)

         An STP Port Termination and SS7 Link Cross Connect is required for each
         56 kbps access link utilized for the Service. STP locations are set
         forth in the National Exchange Carrier Association, Inc. (NECA) Tariff
         F.C.C. No. 4.

         A pre-order meeting will define the SWBT facility availability and the
         degree of diversity in both the SWBT physical network and the LSP
         physical network from signaling point to signaling point for the link.

         All applicable signaling point codes for each signaling link must be
         installed at each of SWBT's interconnecting STPs.

         Call set-up times may be adversely affected when LSP, using SS7
         signaling, employs Intermediate Access Tandems (IATs) in its network.
         SWBT makes no warranties with respect to call set-up times when
         multiple STP pairs are involved or when the signaling traffic is
         exchanged between two non-SWBT signaling points.

         Provisioning of the SS7 Service is in accordance with SWBT CCS/SS7
         Network Interface Specifications (TP76638) and Bellcore Common Channel
         Network Interface Specification (GR-905-CORE), as amended.

         When LSP uses the Dedicated Signaling Links of another party and LSP
         submits an order for SWBT to change the routing or screening
         information associated with the other party's signaling links, LSP
         shall include with the order a Letter of Authorization (LOA). The LOA
         shall be from the other party (i.e. the owner of the set of links) and
         shall indicate that the other party shall agree to pay SWBT charges to
         change the translations associated with the link set and shall agree to
         pay SWBT charges associated with SS7 Transport.
<PAGE>   215

                                                                  APPENDIX SS7
                                                                  Page 7 of 12


         C.       USE OF THE STP

                  When LSP orders SWBT Unbundled Local Switching the Use of the
                  STP shall apply. No order nor provisioning by LSP is needed.
                  The SWBT Local Switch will use the SWBT SS7 signaling network.

                  Any changes, additions or deletions to the SWBT SS7 signaling
                  network required per LSP shall be submitted pursuant to
                  Attachment Network Element Bona Fide Request.

IV.      DESCRIPTION OF RATE ELEMENTS

         The following rate elements apply to SS7 Service:

         A.       SS7 TRANSPORT

                  SS7 Transport shall be measured per octet of information
                  screened and routed.

                  LSP shall pay SS7 Transport Per Octet rate element for the
                  screening and routing of messages by each additional SWBT STP
                  pair. A usage rate applies per octet generated by action of
                  LSP.

         B.       DEDICATED SIGNALING LINKS

                  1.       SS7 Link Cross Connect

                           LSP shall pay the DS-0 or DS-1 rate for the SS7 Link
                           Cross Connect at the STP location for each Dedicated
                           Signaling Link. Rates are per DS-0 and DS-1 bandwidth
                           and per connection to unbundled dedicated facility or
                           connection to a collocation cage. Rates are per month
                           and nonrecurring installation per first or additional
                           cross connects ordered per order.

                  2.       STP Port Termination

                           LSP shall pay the STP Port Termination rate element
                           for each termination of the SS7 Link Cross Connect at
                           the SWBT STP. One STP Port Termination must be
                           installed at SWBT's interconnecting STP for each
                           Dedicated Signaling Link.

                           There are two charges that apply to the STP Port
                           Termination, i.e., a fixed recurring monthly rate per
                           port termination and a nonrecurring installation
                           charge per port.
<PAGE>   216
                                                                  APPENDIX SS7
                                                                  Page 8 of 12



         C.       SIGNALING POINT CODE ADDITION

                  LSP shall pay the Signaling Point Code Addition rate element
                  for the establishment and translation of each applicable CCS
                  network signaling point code at a SWBT STP. LSP shall pay a
                  nonrecurring charge per Signaling Point Code established at
                  each STP.

         D.       GLOBAL TITLE TRANSLATION (GTT) ADDITION

                  LSP shall pay the GTT Addition rate element for the
                  establishment of LSP's global title address, translation type
                  or subsystem information in the SWBT STP translations. LSP
                  shall pay a nonrecurring charge per GTT established at each
                  STP.

         E.       SERVICE REARRANGEMENT

                  LSP shall pay charges for rearrangement of the SS7 Service
                  which are not specifically addressed pursuant to the Network
                  Element Bona Fide Request process.

         F.       USE OF THE STP PER CALL

                  LSP shall pay the Use of the STP Per Call rate element for Use
                  of the SWBT STP. The rate shall apply for each call originated
                  by LSP subscribers using the SWBT Local Switch Unbundled
                  Network Element. The rate is based on an assumed mean quantity
                  of 200 octets of signaling used for each originated call times
                  the STP Transport rate element.

                  The Use of the STP Per Call is a surrogate for STP Transport
                  and Dedicated Signaling Links when LSP uses the SWBT Unbundled
                  Local Switching Network Element.


<PAGE>   217
                                                                  APPENDIX SS7
                                                                  Page 9 of 12

V.       RATES AND CHARGES

         Rates and Charges for the elements described above are as follows:

<TABLE>
<CAPTION>
                                                                Monthly                        Nonrecurring
         SS7 Links - Cross Connects                 Zone A       Zone B       Zone C       Initial    Additional
         --------------------------                 ------       ------       ------       -------    ----------
<S>                                  <C>            <C>           <C>          <C>          <C>          <C>    
         STP to Collocators Cage - DS0              $74.60        $74.60       $74.60       $260.15      $206.00
         STP to Collocators Cage - DS1              $53.80        $53.80       $53.80       $231.60      $177.50
         STP to SWBT MDF - DS0                      $74.60        $74.60       $74.60       $260.15      $206.00
         STP to SWBT DSX Frame - DS1                $53.80        $53.80       $53.80       $231.60      $177.50

         SS7
         ---
         Links
         -----
         STP Access Connection - 1.544 Mbps      See Dedicated
                                                 Transport
         STP Access Link - 56 Kbps                  $100.16 fixed +
                                                      $0.91 per mile


         SS7 Signalling
         --------------
         SS7 Signalling                                 $0.000460 per call
         STP Port                                       $1,780.65 per port                  $291.50           -
         STP Trunk Signalling                          $0.0000023 per octet
         Point Code Addition                                  N/A per point code             $15.35           -
         Global Title Translation Addition                     ICB                              ICB         ICB
</TABLE>

VI.      ORDERING THE SERVICE

         LSP shall abide by the following ordering guidelines:

         A.       SS7 TRANSPORT

                  LSP shall submit SWBT's CCS/SS7 Activity Notification Form,
                  identify the set of links the LSP will use and identify the
                  service(s) associated with each SPC. LSP shall identify
                  Signaling Point Code and Global Title Translation information
                  that must be translated into the SWBT STPs.

         B.       DEDICATED SIGNALING LINKS

                  LSP shall submit an Access Service Request form and SWBT's CCS
                  Activity Notification form. LSP shall identify the SWBT STPs,
                  the LSP premises, the circuit interconnection arrangement at
                  the LSP Dedicated Transport location and the LSP signaling
                  point. LSP shall identify Signaling Point Code and Global
                  Title Translation information that must be translated in the
                  SWBT STPs.

         C.       SIGNALING POINT CODE ADDITION

                  LSP shall submit a SWBT CCS Activity Notification form. LSP
                  shall identify the SWBT STPs and the LSP signaling point code
                  information that must be added or changed in the SWBT STP
                  translations. If more than one pair of SWBT STPs are affected,
                  LSP shall indicate translation route information.
<PAGE>   218
                                                                  APPENDIX SS7
                                                                  Page 10 of 12



         D.       GLOBAL TITLE TRANSLATION (GTT) ADDITION

                  LSP shall submit a SWBT CCS Activity Notification form. LSP
                  shall identify the SWBT Global Title Translation information
                  that must be added, deleted or changed in the SWBT STP
                  translations. If more than one pair of SWBT STPs are affected,
                  LSP shall indicate translation route information.

         E.       SERVICE REARRANGEMENT

                  LSP shall order a SS7 Signaling Service Rearrangement per
                  Attachment Network Element Bona Fide Request.

         F.       USE OF THE STP

                  Ordering requirements for the Use of the STP are included in
                  the requirements set forth in the ordering clause of the Local
                  Switching UNE (Attachment Switching), and are incorporated
                  here by reference.

VII.     RESPONSIBILITIES OF SWBT

         A.       SWBT shall manage the network and, at its sole discretion,
                  apply protective controls. Protective controls include actions
                  taken to control or minimize the effect of network failures or
                  occurrences, which include, but are not limited to, failure or
                  overload of SWBT or LSP facilities, natural disasters, mass
                  calling or national security demands.

         B.       SWBT shall determine the GTT and Translation Type (TT) route
                  for messages routed to GTT which are associated with SWBT
                  signaling points.

         C.       SWBT shall define regional functions and local functions of
                  its STPs. SWBT will route ISUP messages within the SWBT
                  signaling network subject to technical feasibility. Capacity
                  limitations shall define a temporary technical infeasibility
                  until the capacity limit can be resolved.

         D.       SWBT shall meet service performance standards as outlined in
                  GR-905-CORE and TP76638 except as otherwise provided herein.

         E.       In the event that SWBT provides under this contract special
                  service arrangements associated with diversity or other
                  arrangements that do not strictly adhere to GR-905-CORE and
                  TP76638 and are of non-compliance to the technical
                  publications or not certified by SWBT, LSP acknowledges that
                  the service performance standards need not be met in the
                  provision of the total service.
<PAGE>   219
                                                                  APPENDIX SS7
                                                                  Page 11 of 12


         F.       SWBT shall route messages generated by the action of LSP
                  throughout the SWBT signaling network. The content of the
                  messages is for the use of signaling points of origination and
                  destination. SWBT will not use any information within messages
                  for any purpose not required by or related to the use of the
                  SWBT signaling network. SWBT will not divulge any message or
                  any part of messages generated by LSP to any other party,
                  except as required to manage the SWBT signaling network or as
                  may be required by law.

         G.       SWBT shall determine the monthly charges and issue an invoice
                  to the billing address of LSP for the respective service(s)
                  requested by LSP and provided by SWBT. The invoice will
                  identify nonrecurring charges, recurring charges, and other
                  charges and credits, as they apply.

         H.       SWBT shall work cooperatively and provide knowledgeable
                  personnel to meet with LSP in order to provision, test and
                  install the SS7 Service in a timely fashion.

VIII.    RESPONSIBILITIES OF LSP

         A.       LSP shall provision the signaling links at the LSP premises
                  and from the LSP premises to the SWBT STP location in a
                  diverse, reliable and technically acceptable manner to comply
                  with the standard SS7 protocol, Bellcore GR-905-CORE and the
                  SWBT network.

         B.       If LSP requires a greater degree of diversity than SWBT
                  provides in the existing network, a special facility or a
                  special routing of services, LSP agrees to initiate a
                  Wholesale Construction request and pay additional charges as
                  SWBT may reasonably determine.

         C.       LSP shall identify to SWBT the SPC(s) associated with the LSP
                  set of links.

         D.       When LSP orders the use of the SWBT STP, LSP shall specify the
                  set of signaling links to be used. If the links are provided
                  to another party LSP shall warrant to SWBT that the other
                  party is aware of the charges associated with the use of the
                  STP and that the other party will pay the monthly charges for
                  the use of the SWBT STP.

         E.       LSP shall identify to SWBT the Global Title and Translation
                  Type information for messages that route to LSP.

         F.       When routing messages addressed to a SWBT Subsystem Number
                  (SSN), LSP shall use the SWBT defined SSN designation of the
                  SWBT mated STP pair to which the message is routed.
<PAGE>   220
                                                                  APPENDIX SS7
                                                                  Page 12 of 12



         G.       LSP shall transfer Calling Party Number Parameter information
                  unchanged, including the "privacy indicator" information, when
                  ISUP Initial Address Messages are interchanged with the SWBT
                  signaling network.

         H.       LSP shall verify the accuracy of information concerning the
                  services ordered by LSP.

         I.       LSP shall designate the level of diversity associated with the
                  LSP premises. SWBT shall provide the same degree of diversity
                  as LSP provides.

         J.       LSP shall work cooperatively and provide knowledgeable
                  personnel to meet with SWBT in order to provision, test and
                  install the SS7 Service in a timely fashion.

         K.       LSP shall furnish to SWBT, at the time the SS7 Service is
                  ordered and annually thereafter, an updated three year
                  forecast of usage of the SS7 Signaling network. The forecast
                  shall include total annual volume and busy hour busy month
                  volume. SWBT shall utilize the forecast in its own efforts to
                  project further facility requirements.

         L.       LSP shall inform SWBT in writing thirty (30) days in advance
                  of any change in LSP's use of such SS7 Service which alters by
                  ten percent for any thirty (30) day period the volume of
                  signaling transactions by individual SS7 service that are
                  planned by LSP to be forwarded to SWBTs network. LSP shall
                  provide in said notice the reason, by individual SS7 service,
                  for the volume change.



<PAGE>   221


                                                                  Attachment 1
                                                                  APPENDIX SS7
                                                                   Page 1 of 2



                                  ATTACHMENT I

                              DEFINITIONS OF TERMS

Common Channel Signaling (CCS)

A high-speed specialized packet switched communications network that is separate
(out-of-band) from the public packet switched and message networks. CCS carries
addressed signaling messages for individual trunk circuits and/or database
related services between Signaling Points (SS7 nodes) in the CCS network.

Compatibility Testing

Testing performed by representatives from SWBT and LSP to determine proper
interconnection of CCS network facilities for accurate transmission of system
signals and messages. This is often referred to as TR-905 Compatibility Testing.

Octet

8-bits of binary information.

Service Control Point (SCP)

A node in the CCS network that provides a database functionality.

Service Switching Point (SSP)

A signaling point that can launch queries to databases and receive/interpret
responses used to provide specific end user services.

Signal Transfer Point (STP)

A packet switch in the CCS network that is used to route SS7 protocol signaling
messages between signaling nodes. An STP provides screening and routing of SS7
messages. STPs transfer signaling messages to other networks. SWBT's signaling
network includes mated pairs of local and regional STPs.

Signaling Link

An end-to-end high-capacity digital, data quality, link operating at 56 kilobits
per second that transmits signaling information in the form of signaling
messages from one network SS7 node to another node in a CCS network. The Link
Type identifies the functionality of the signaling link sets. Signaling links
provide physical interconnection between signaling points of another party and
SWBT STPs.

                                       
<PAGE>   222
                                                                  Attachment 1
                                                                  APPENDIX SS7
                                                                   Page 2 of 2

Signaling Point (SP)

A node in the CCS network that originates and/or receives signaling messages, or
transfers signaling messages from one signaling link to another, or both.

Signaling Point Code (SPC)

An identifier code that identifies a signaling point in the CCS network. The
signaling point code provides an address within the CCS network which enables
messages to be routed to signaling points. Signaling Point Codes are 24 bit
binary numbers comprised of three segments: the Network Identification, the
Network Cluster, and the Member number within the cluster. Signaling Point Codes
are represented digitally as AAA-AAA-AAA, where "AAA" represents a decimal
number from 000 to 255.

Signaling Point of Interface (SPOI)

Mutually agreed point at which SWBT hands off signaling information to LSP.

Signaling System 7 (SS7)

See SS7-Protocol

Signaling System 7 (SS7) Protocol

The signaling protocol, Version 7, used by the nodes of the CCS network. The SS7
protocol used by SWBT is the American National Standards Institute (ANSI)
standard protocol defined by Bellcore Generic Requirement, GR-246-CORE, defined
by Bellcore requirements (GR-317-CORE, GR-394-CORE, GR-444-Core, GR-606-CORE,
GR-82-CORE, GR-905-CORE and various other documents) and defined by the SWBT
Technical Publication TP76638.



<PAGE>   223


                                                            APPENDIX RECORDING



                               APPENDIX RECORDING

                        RECORDING, MESSAGE PROCESSING AND
                 PROVISION OF INTEREXCHANGE CARRIER TRANSPORTED
                             MESSAGE DETAIL APPENDIX

This Appendix sets forth the terms and conditions under which SWBT will provide
recording, message processing and message detail services as described in total
in Exhibit I, SERVICES AND ASSOCIATED CHARGES, and those services specifically
selected by LSP as described in Exhibit II, SELECTED SERVICE OPTIONS AND METHOD
OF PROVISION and at the rates set forth in Exhibit III, BASIS OF COMPENSATION.
Exhibits I, II and III are attached hereto and made a part of this Appendix by
reference.

         I.       DEFINITIONS

                  As used herein and for the purposes of this Appendix, the
                  following terms shall have the meanings set forth below:

                  A.       Access Usage Record (AUR) - a message record which
                           contains the usage measurement reflecting the service
                           feature group, duration and time of day for a message
                           and is subsequently used to bill access to
                           Interexchange Carriers (IXCs).

                  B.       Assembly and Editing - the aggregation of recorded
                           customer message details to create individual message
                           records and the verification that all necessary
                           information required to ensure all individual message
                           records meet industry specifications is present.

                  C.       Billing Company - the company that bills end users
                           for the charges incurred in originating and
                           terminating IXC transported calls.

                  D.       Centralized Message Distribution System (CMDS) - the
                           national network of private line facilities used to
                           exchange Exchange Message Records (EMR) formatted
                           billing data between SWBT and the Billing Company.

                  E.       Data Transmission - the forwarding by SWBT of IXC
                           transported toll message detail and/or access usage
                           record detail in EMR format over data lines or on
                           magnetic tapes to the appropriate Billing Company.

                  F.       Exchange Message Record (EMR) - Industry standard
                           message format as described in accordance with the
                           Bellcore Practice BR010-200-010 developed for the
                           interexchange of telecommunications message
                           information.

                  G.       Interexchange Carrier (IXC) - A third party
                           transmission provider that carries long distance
                           voice and non-voice traffic between user locations
                           for a related

                                                                               2
<PAGE>   224
                                                            APPENDIX RECORDING


                           recurring fee. IXCs provide service interstate and
                           intrastate. In some states IXCs are permitted to
                           operate within a LATA.

                  H.       Interexchange Carrier Transported -
                           telecommunications services provided by an IXC or
                           traffic transported by facilities belonging to an
                           IXC.

                  I.       Message Processing - the creation of individual EMR
                           formatted billable message detail records from
                           individual recordings that reflect specific billing
                           detail for use in billing the end user and/or access
                           usage records from individual recordings that reflect
                           the service feature group, duration and time of day
                           for a message, Carrier Identification Code, among
                           other fields, for use in billing access to the
                           Interexchange Carriers. Message Processing includes
                           performing CMDS online edits required to ensure
                           message detail and access usage records are
                           consistent with CMDS specifications.

                  J.       Originating Local Exchange Carrier Company - the
                           company whose local exchange telephone network is
                           used to originate calls thereby providing originating
                           exchange access to IXCs.

                  K.       Provision of Message Detail - the sorting of all
                           billable message detail and access usage record
                           detail by Revenue Accounting Office, Operating
                           Company Number or Service Bureau, splitting of data
                           into packs for invoicing, and loading of data into
                           files for data transmission to LSP for those records
                           created internally or received from other Local
                           Exchange Carrier Companies or Interexchange Carriers
                           through SWBT's internal network or national CMDS.

                  L.       Record - a logical grouping of information as
                           described in the programs that process information
                           and create the magnetic tapes or data files.

                  M.       Recording - the creation and storage on magnetic tape
                           or other medium of the basic billing details of a
                           message in Automatic Message Accounting (AMA) format.

                  N.       Service Switching Point (SSP) - a signaling point
                           that can launch queries to databases and
                           receive/interpret responses used to provide specific
                           customer services.

                  O.       Switching Control Point (SCP) - the real time
                           database system that contains routing instructions
                           for 800 calls. In addition to basic routing
                           instructions, the SCP may also provide vertical
                           feature translations, i.e., time of day, day of week
                           routing, out of area screening and/or translation of
                           the dialed 800 number to its assigned working
                           telephone number.

                  P.       800 SCP Carrier Access Usage Summary Record (SCP
                           Record) - a summary record which contains information
                           concerning the quantity and types of queries launched
                           to a SWBT SCP. In those situations where charges are
                           applicable for 


                                                                               3
<PAGE>   225
                                                            APPENDIX RECORDING


                           the production and delivery of SCP records, such
                           charges will be those specified in Exhibit III-A
                           pertaining to the production and forwarding of AUR
                           data.

                  Q.       Terminating Local Exchange Carrier Company - the
                           company whose local exchange telephone network is
                           used to terminate calls thereby providing terminating
                           exchange access to IXCs.

         II.      RESPONSIBILITIES OF THE PARTIES

                  A.       SWBT will record all IXC transported messages for LSP
                           carried over all Feature Group Switched Access
                           Services that are available to SWBT-provided
                           recording equipment or operators. Unavailable
                           messages (i.e., certain operator messages which are
                           not accessible by SWBT-provided equipment or
                           operators) will not be recorded. The recording
                           equipment will be provided at locations selected by
                           SWBT.

                  B.       SWBT will perform assembly and editing, message
                           processing and provision of applicable access usage
                           record detail for IXC transported messages if the
                           messages are recorded by SWBT.

                  C.       SWBT will provide access usage records that are
                           generated by SWBT.

                  D.       Assembly and editing will be performed on all IXC
                           transported messages recorded by SWBT, during the
                           billing period established by SWBT and selected by
                           LSP from Exhibit III-B.

                  E.       Standard EMR record formats for the provision of
                           billable message detail and access usage record
                           detail will be established by SWBT and provided to
                           LSP.

                  F.       Recorded access usage record detail will not be
                           sorted to furnish detail by specific end users, by
                           specific groups of end users, by office, by feature
                           group or by location.

                  G.       SWBT will provide message detail to LSP either on
                           magnetic tapes or in data files, depending on the
                           option contracted for by LSP in Exhibit III. Only ONE
                           method may be selected by the LSP.

                           1.       Magnetic Tapes

                                    a.      SWBT will supply the magnetic tapes,
                                            which will be provided without the
                                            return of previously supplied tapes.

                                    b.      LSP will specify one of the
                                            following options for provision of
                                            tapes:

                                                                               4
<PAGE>   226
                                                            APPENDIX RECORDING


                                    1)      SWBT may send the tapes to LSP via
                                            first class U.S. Mail Service or an
                                            equivalent service of SWBT's choice,
                                            or

                                    2)      LSP may pick up the magnetic tapes
                                            at a location designated by SWBT.

                                    3)      If, at the request of LSP, overnight
                                            delivery other than those provided
                                            in 1 & 2 above is requested, the
                                            cost of this delivery will be at the
                                            expense of LSP.

                           2.       Data Files

                                    The message detail may be transmitted to LSP
                                    in data files via data lines using software
                                    and hardware acceptable to both parties.

                  H.       In Exhibit III LSP will identify separately the
                           location where the tapes and any data transmissions
                           should be sent (as applicable) and the number of
                           times each month the information should be provided.
                           SWBT reserves the right to limit the frequency of
                           transmission to existing SWBT processing and work
                           schedules, holidays, etc.

                  I.       SWBT will determine the number of magnetic tapes or
                           data files required to provide the access usage
                           record detail to LSP.

                  J.       Access usage record detail previously provided LSP
                           and lost or destroyed through no fault of SWBT will
                           not be recovered and made available to LSP except on
                           an individual case basis at a cost determined by
                           SWBT.

                  K.       When SWBT receives rated billable messages from an
                           IXC or another Local Exchange Carrier (LEC) that are
                           to be billed by LSP, SWBT will forward those messages
                           to LSP.

                  L.       When SWBT has rated billable message detail
                           originating from LSP's end users requiring billing by
                           another LEC or LSP, SWBT will forward such messages
                           to the appropriate Billing Company.

                  M.       SWBT will record the applicable detail necessary to
                           generate access usage records and forward them to LSP
                           for its use in billing access to the IXC.

         III.     BASIS OF COMPENSATION

                  A.       Compensation for recording, assembly and editing,
                           rating, message processing and provision of messages
                           provided hereunder by SWBT for the LSP shall be based
                           upon the rates and charges set forth in Exhibit III,
                           BASIS OF COMPENSATION.


                                                                               5
<PAGE>   227
                                                            APPENDIX RECORDING



                  B.       When message detail is entered on a magnetic tape or
                           data file for provision of message detail to LSP, a
                           per record charge will apply for each record
                           processed. SWBT will determine the charges based on
                           its count of the records processed.

         IV.      LIABILITY

                  A.       Except as otherwise provided herein, neither party
                           shall be liable to the other for any special,
                           indirect, or consequential damage of any kind
                           whatsoever. A party shall not be liable for its
                           inability to meet the terms of this Agreement where
                           such inability is caused by failure of the first
                           party to comply with the obligations stated herein.
                           Each party is obliged to use its best efforts to
                           mitigate damages.

                  B.       When SWBT is notified that, due to error or omission,
                           incomplete data has been provided to the LSP, SWBT
                           will make reasonable efforts to locate and/or recover
                           the data and provide it to the LSP at no additional
                           charge. Such requests to recover the data must be
                           made within 30 days from the date the details
                           initially were made available to the LSP. If written
                           notification is not received within 30 days, SWBT
                           shall have no further obligation to recover the data
                           and shall have no further liability to the LSP.

                  C.       If, despite timely notification by the LSP, message
                           detail is lost and unrecoverable as a direct result
                           of SWBT having lost or damaged tapes or incurred
                           system outages while performing recording, assembly
                           and editing, rating, message processing, and/or
                           transmission of message detail, SWBT will estimate
                           the volume of lost messages and associated revenue
                           based on information available to it concerning the
                           average revenue per minute for the average interstate
                           and/or intrastate call. In such events, SWBT's
                           liability to the LSP shall be limited to the granting
                           of a credit adjusting amounts otherwise due from it
                           equal to the estimated net lost revenue associated
                           with the lost message detail.

                  D.       SWBT will not be liable for any costs incurred by the
                           LSP when the LSP is transmitting data files via data
                           lines and a transmission failure results in the
                           non-receipt of data by SWBT.

                  E.       The LSP agrees to defend, indemnify, and hold
                           harmless SWBT from any and all losses, damages, or
                           other liability, including attorney fees, that it may
                           incur as a result of claims, demands, or other suits
                           brought by any party that arise out of the use of
                           this service by the LSP, its customers or end users.
                           The LSP shall defend against all end users' claims
                           just as if the LSP had provided such service to its
                           end users with its own employees.

                  F.       The LSP also agrees to release, defend, indemnify and
                           hold harmless SWBT from any claim, demand or suit
                           that asserts any infringement or invasion of privacy
                           or confidentiality of any person(s), caused or
                           claimed to be caused, directly or indirectly, by SWBT
                           employees and equipment associated with provision of
                           this 

                                                                               6
<PAGE>   228
                                                            APPENDIX RECORDING






                           service. This includes, but is not limited to suits
                           arising from disclosure of any customer specific
                           information associated with either the originating or
                           terminating numbers used to provision this service.

SWBT MAKES NO REPRESENTATIONS OR WARRANTIES, EXPRESS OR IMPLIED, INCLUDING BUT
NOT LIMITED TO ANY WARRANTY AS TO MERCHANTABILITY OR FITNESS FOR INTENDED OR
PARTICULAR PURPOSE WITH RESPECT TO SERVICES PROVIDED HEREUNDER. ADDITIONALLY,
SWBT ASSUMES NO RESPONSIBILITY WITH REGARD TO THE CORRECTNESS OF THE DATA
SUPPLIED BY LSP WHEN THIS DATA IS ACCESSED AND USED BY A THIRD PARTY.



























                                                                               7
<PAGE>   229





                                    EXHIBIT 1

                         EXPLANATION OF SERVICE OPTIONS

The attached pages of this Exhibit I show the service options that are offered
under this Appendix and the charges that are associated with each option.
Alphabetical and numerical references in the CHARGES columns are to rates and
charges set forth in Exhibit III, BASIS OF COMPENSATION.

ORIGINATING 1+ DDD RECORDINGS - IXC TRANSPORTED MESSAGE DETAIL AND ACCESS USAGE
RECORDS

OPTION #1:        SWBT performs recording, assembly and editing, rating of
                  billable message detail and creates an Access Usage Record
                  (AUR) for all 1+ Interexchange Carrier (IXC) transported
                  messages originating from LSP end office telephone network and
                  forwards both billable message detail records and AUR records
                  to LSP.

OPTION #2:        SWBT performs recording, assembly and editing of the
                  billable message detail and extracts that detail to the IXC
                  for all 1+ IXC transported messages originating from LSP end
                  office. SWBT creates Access Usage Records for this traffic and
                  forwards those AUR records to LSP.

OPTION #3:        The IXCs do their own billable message recording for their
                  1+ IXC transported messages originating from LSP end office.
                  SWBT performs recording for Access purposes only, assembles
                  and edits this data, creates AURs and forwards the AUR records
                  to LSP.

ORIGINATING OPERATOR RECORDINGS - IXC TRANSPORTED MESSAGE DETAIL AND ACCESS
USAGE RECORDS

OPTION #4:        LSP Non-Equal Access End Office - The IXCs do their own
                  billable message recording. SWBT performs local and intraLATA
                  operator services for LSP. SWBT performs recording at the
                  operator switch for all 0+, 0-, Coin Sent Paid, CAMA and
                  International IXC transported messages. SWBT assembles and
                  edits this data, creates AURs and forwards the AUR records to
                  LSP.

OPTION #5:        LSP Equal Access End Office - The IXCs do their own
                  billable message recording. SWBT performs local and intraLATA
                  operator services for LSP. SWBT performs recording at the
                  operator switch for 0- only IXC transported messages. SWBT
                  assembles and edits this data, creates AURs and forwards the
                  AUR records to LSP.

OPTION #6:        LSP Equal or Non-Equal Access End Office - The IXCs do
                  their own billable message recording. LSP chooses to have SWBT
                  purchase source information from IXC in order to have
                  information required to create Access Usage Records. SWBT
                  assembles and edits this data, creates AURs and forwards the
                  AUR records to LSP.


                                                                               1
<PAGE>   230

OPTION #7:        The IXCs do their own billable message recording and
                  forward to SWBT the billable message detail for assembly and
                  editing and rating of these operator service IXC transported
                  messages. SWBT forwards the rated billable message detail to
                  the appropriate billing company, creates an AUR and forwards
                  the AUR records to LSP. This situation occurs when the LSP has
                  not signed a rating takeback waiver with the IXC.

800 RECORDINGS - IXC TRANSPORTED MESSAGE DETAIL

OPTION #8:        SWBT performs SSP function for LSP end office and bills
                  query charge to the appropriate IXC. SWBT performs recording
                  for Access purposes only, assembles and edits this data,
                  creates AURs and forwards AUR records to LSP.

OPTION #9:        SWBT performs SSP function for LSP end office. LSP
                  performs billing of query charge to the appropriate IXC. SWBT
                  performs recording at the SSP for Access purposes only,
                  assembles and edits this data, creates AURs and forwards AUR
                  records to LSP. SWBT performs recording at the SCP for query
                  billing purposes only, assembles and edits this data, creates
                  SCP records and forwards SCP records to LSP.

OPTION 10:        SWBT performs SCP function for LSP. SWBT performs
                  recording at the SCP, assembles and edits this data, creates
                  SCP records and forwards SCP records to LSP.

TERMINATING RECORDINGS - IXC TRANSPORTED ACCESS USAGE RECORDS

OPTION 11:        SWBT provides tandem function for LSP. LSP requests SWBT
                  to provide all Feature Group B, Feature Group C and Feature
                  Group D terminating usage recordings including Feature Group B
                  over D and Feature Group C over D. SWBT creates terminating
                  AURs for this data and forwards AUR records to the LSP.

OPTION 12:        SWBT provides tandem function for LSP. The LSP requests
                  SWBT to provide all Feature Group B terminating usage
                  recordings excluding B over D. SWBT creates terminating AURs
                  for this data and forwards AUR records to LSP.

OPTION 13:        SWBT provides tandem function for LSP. LSP requests SWBT
                  to provide all Feature Group B terminating usage recordings
                  including Feature Group B over D. SWBT creates terminating
                  AURs for this data and forwards AUR records to the LSP.

OPTION 14:        SWBT provides tandem function for LSP. LSP requests SWBT
                  to provide all Feature Group D terminating usage recordings
                  including B over D and C over D. SWBT creates terminating AURs
                  for this data and forwards AUR records to the LSP.


                                                                               2
<PAGE>   231

OPTION 15:        SWBT provides tandem function for LSP. The LSP requests
                  SWBT to provide all Feature Group D terminating usage
                  recordings including B over D. SWBT creates terminating AURs
                  for this data and forwards AUR records to the LSP.

MESSAGE PROVISIONING:

OPTION 16:        SWBT will forward all IXC transpose message detail records
                  or access usage records to LSP generated internally within
                  SWBT system or received via CMDS from an IXC or another Local
                  Exchange Carrier or LSP. LSP forwards rated IXC transported
                  message detail or access usage detail to SWBT for distribution
                  to the appropriate billing company through SWBT's internal
                  network or using the CMDS network.

                           There is no charge for this option under this
                           Appendix if LSP has also executed, as part of an
                           agreement executed pursuant to this Statement, an
                           Appendix for SWBT to provide "Hosting" services to
                           LSP, of if LSP has executed a separate agreement with
                           SWBT for "Hosting" services to be provided from SWBT
                           to LSP.
















                                                                               3
<PAGE>   232


                            DRAFT APPENDIX RECORDING

                                   EXHIBIT II

                            SELECTED SERVICE OPTIONS

                                       AND

                               METHOD OF PROVISION

The service options and method of provision selected by the LSP under this
Appendix are as indicated on page two, attached, of this Exhibit II. Numerical
references are to service options shown in Exhibit I.









                                                                               4
<PAGE>   233


                               APPENDIX RECORDING

                                   EXHIBIT II

                            SELECTED SERVICE OPTIONS
                                       AND
                               METHOD OF PROVISION

Attached to and made a part of the RECORDING, MESSAGE PROCESSING AND PROVISION
OF INTEREXCHANGE CARRIER TRANSPORTED MESSAGE DETAIL AGREEMENT
effective__________________ , 19___ , between Southwestern Bell Telephone
Company and__________________________________.

The service options and method of provision selected by the LSP under this
Appendix are as indicated on page 2, attached, of this Exhibit II. Numerical
references are to service options shown in Exhibit I.









Approved and executed the_________day of_____________, 19_____.


_______________________________                      SOUTHWESTERN BELL
                                                     TELEPHONE COMPANY



By:____________________________                      By:________________________
            (Title)                                            (Title)




                                                                               5
<PAGE>   234


                               APPENDIX RECORDING

                                   EXHIBIT II

                            SELECTED SERVICE OPTIONS
                             AND METHOD OF PROVISION

                               EFFECTIVE DATE:
                                               ---------------

<TABLE>
<CAPTION>
                                                                                             Message
            1+DDD               Operator Handled     800 Service         Terminating AUR   Provisioning
           Options                  Options            Options               Options         Options

- -------------------------------------------------------------------------------------------------------
<S><C>   
NPA/NXX      1     2    3     4    5   6    7    8    9    10    11    12    13   14    15     16
- -------------------------------------------------------------------------------------------------------

- -------------------------------------------------------------------------------------------------------

- -------------------------------------------------------------------------------------------------------

- -------------------------------------------------------------------------------------------------------

- -------------------------------------------------------------------------------------------------------

- -------------------------------------------------------------------------------------------------------

- -------------------------------------------------------------------------------------------------------

- -------------------------------------------------------------------------------------------------------

- -------------------------------------------------------------------------------------------------------

- -------------------------------------------------------------------------------------------------------

- -------------------------------------------------------------------------------------------------------

- -------------------------------------------------------------------------------------------------------

- -------------------------------------------------------------------------------------------------------
</TABLE>

Numerical references are to specific service options listed in Exhibit I.


                                                                               6
<PAGE>   235


                               APPENDIX RECORDING

                                   EXHIBIT II

                            SELECTED SERVICE OPTIONS
                             AND METHOD OF PROVISION

                          EFFECTIVE DATE:__________

METHOD OF PROVISION:

   Circle One:    DATA FILE    9 TRACK MAGNETIC TAPE    18 TRACK MAGNETIC TAPE



<PAGE>   236


                            DRAFT APPENDIX RECORDING

                                  EXHIBIT III-A

            BASIS OF COMPENSATION [Rates to be consistent with order.]

                                    EFFECTIVE:________________________

LSP shall pay SWBT the following amounts for services provided under the
Recording, Message Processing and Provision of Message Detail Appendix.


TYPE OF ACTIVITY                                                           RATE

A.       Recording
                  Per AUR                                                 $.0100

B.       Assembly and Editing
                  Per Message and/or AUR                                  $.0050

C.       Rating
                  Per Message                                             $.0050

D.       Message Processing
                  Per Message and/or AUR                                  $.0050

E.       Provision of Message Detail
                  Per Record                                              $.0030

F.       Source Information Provided
         1.       Per Record Purchased - Meet Point Bill Applicable       $.0115
         2.       Per Record Purchased - Meet Point Bill Not Applicable   $.0230






                                                                               8
<PAGE>   237


                            DRAFT APPENDIX RECORDING
                                  EXHIBIT III-B

                               INVOICE DESIGNATION

COMPANY NAME:_________________________________________________

EXCHANGE COMPANY I.D.  NUMBER (OCN):  __  __  __  __

BILLABLE INVOICE INTERVAL:

Check One:

[ ]                         Daily (Full Status RAO Companies will receive 
                           billable messages daily.)

[ ]                         Bill period (A maximum of five dates may be chosen.)
                           A file is created five workdays from each bill period
                           date, and three additional days should be allowed for
                           distribution. Circle a maximum of five bill period
                           dates:

1   3   5   7   9   11   13   15   17   19   21   23   25   27   29

TAPE MAILING ADDRESS:
(Full RAO Companies will receive AURs at the same address as billable message
toll.)





                                                                               9
<PAGE>   238


                            DRAFT APPENDIX RECORDING
                                  EXHIBIT III-B



AUR INVOICE INTERVAL:

Check One:

[ ]                         Daily (Full Status RAO Companies will receive AURs 
                           daily.)

[ ]                         Bill period (A maximum of five dates may be chosen.)
                           A file is created five workdays from each bill period
                           date, and three additional days should be allowed for
                           distribution. Circle a maximum of five bill period
                           dates:



1   3   5   7   9   11   13   15   17   19   21   23   25   27   29

TAPE MAILING ADDRESS:
(Full RAO Companies will receive AURs at the same address as billable message
toll.)








                                                                              10
<PAGE>   239


                                                  APPENDIX-RESALE (MO, AR & KS)
                                                                   PAGE 2 OF 12

                                 APPENDIX RESALE

This Appendix sets forth the rates, terms and conditions for those services
available for sale at retail to end users which are made available to LSPs by
SWBT for resale.

1.0      TERMS AND CONDITIONS OF SERVICE

         1.1      For services included in this Appendix, the rules and
                  regulations associated with the corresponding tariffs apply
                  except for applicable resale restrictions, which are offered
                  through tariffs by SWBT to its end users and except as
                  otherwise provided herein.

         1.2      LSP shall only sell Plexar services to a single end user.

         1.3      Except where otherwise explicitly provided in the
                  corresponding tariffs, LSP shall not permit the sharing of a
                  service by multiple end users or the aggregation of traffic
                  from multiple end users onto a single service or except where
                  SWBT permits such sharing by its own end users.

         1.4      The LSP shall resell these telecommunications services only to
                  the same class of customers to which SWBT sells the services,
                  e.g. residence service may not be resold to business
                  customers. LSP may only resell Lifeline Assistance, Link-Up,
                  and other like services to similarly situated customers who
                  are eligible for such services. Further, to the extent LSP
                  resells services that require certification on the part of the
                  buyer, LSP will ensure that the buyer has received proper
                  certification and complies with all rules and regulations as
                  established by the Commission.

         1.5      SWBT promotions of ninety (90) days or less shall not be
                  available to the LSP for resale.

         1.6      The LSP shall not use a resold service to avoid the rates,
                  terms and conditions of SWBT's corresponding retail tariff.

         1.7      The LSP shall not use resold local exchange telephone service
                  to provide access or interconnection services to itself,
                  interexchange carriers (IXCs), wireless carriers, competitive
                  access providers (CAPs), or other telecommunications
                  providers. Provided however, that LSP may permit its end users
                  to use resold local exchange telephone service to access IXCs,
                  wireless carriers, CAPs, or other retail telecommunications
                  providers.

         1.8      An End User Common Line (EUCL) charge will continue to apply
                  for each local exchange line resold under this agreement. All
                  federal rules and regulations associated with EUCL charges, as
                  found in Tariff FCC 73, also apply.


<PAGE>   240
                                                  APPENDIX-RESALE (MO, AR & KS)
                                                                  PAGE 3 OF 12

         1.9      To the extent allowable by law, LSP shall be responsible for
                  Primary Interexchange Carrier (PIC) change charges associated
                  with such local exchange line. LSP shall pay for PIC changes
                  at the tariffed rate.

         1.10     SWBT shall provide the services covered by this Appendix
                  subject to availability of existing facilities and on a
                  nondiscriminatory basis with its other customers. LSP shall
                  resell the services provided herein only in those service
                  areas in which such resale services or any feature or
                  capability thereof are offered at retail by SWBT as the
                  incumbent local exchange carrier to its end users.

         1.11     When LSP converts an end user currently receiving non-complex
                  service from the SWBT network, without any changes to SWBT's
                  network, LSP will be charged a per-order conversion charge of
                  twenty-five dollars ($25.00) in Arkansas, Kansas and Missouri.
                  When LSP converts an end user with non-complex service and
                  adds or changes are made to the network, the respective
                  twenty-five dollars ($25.00) conversion charge will apply, as
                  well as any normal service order charges associated with said
                  changes. All nonrecurring service connection charges,
                  excluding the conversion charge mentioned above, will be
                  charged at a discount for those services listed in Exhibits A
                  & B to this Appendix. Complex conversion orders will be
                  charged at a rate of one hundred twenty-five dollars
                  ($125.00). Custom Services conversions (e.g., Plexar Custom)
                  will be handled on a Customer Specific Proposal basis.

         1.12     For the purposes of ordering service under this Appendix, all
                  requests for service shall be handled as an initial request
                  for service. The additional line rate for Service Order
                  Charges shall apply only to those requests for additional
                  residential service at the end user's same location where a
                  residential line is currently provided on SWBT's network,
                  regardless of the non-facilities based local service provider
                  of record.

         1.13     If the LSP is in violation of a provision of this Appendix,
                  SWBT will notify the LSP of the violation in writing. Such
                  notice must refer to the specific provision being violated. At
                  such time, the LSP will have thirty (30) days to correct the
                  violation and notify SWBT in writing that the violation has
                  been corrected. SWBT will then bill the LSP for the charges
                  which should have been collected by SWBT or the actual
                  revenues collected by the LSP from its end users for the
                  stated violation, whichever is greater. Should the LSP dispute
                  the violations, it must notify SWBT in writing within fourteen
                  (14) days of receipt of notice from SWBT. Disputes will be
                  resolved as outlined in the Disputed Amounts Section of the
                  Agreement.

         1.14     SWBT is not required to make services available for resale at
                  wholesale rates to LSP for its own use. SWBT, however, shall
                  at its option agree to allow LSP to purchase SWBT's
                  Telecommunications Services and other services available for


<PAGE>   241
                                                  APPENDIX-RESALE (MO, AR & KS)
                                                                  PAGE 4 OF 12



                  resale as outlined in the exhibits to this Appendix, as long
                  as said services are not resold exclusively or predominately
                  to LSP, its subsidiaries, or affiliates.

         1.15     The effective date of this Appendix shall be ten (10) days
                  after the date the Commission approves the Interconnection
                  Agreement.

2.0      ANCILLARY SERVICES

         2.1      Where available, SWBT will afford LSP end users with the
                  ability to make 911 calls. LSP shall be responsible for
                  collecting and remitting all applicable 911 surcharges on a
                  per line basis to the Public Safety Answering Point (PSAP).

         2.2      Where requested by SWBT, the LSP shall provide SWBT with
                  accurate and complete information regarding end users in a
                  format and time frame prescribed by SWBT, for purposes of 911
                  administration.

         2.3      SWBT shall provide LSP's end users access to SWBT Directory
                  Assistance Service. LSP shall pay SWBT amounts attributable to
                  Directory Assistance services used by LSP's end users.
                  Discounts associated with the utilization of Directory
                  Assistance Service are outlined in the exhibits to this
                  Appendix.

         2.4      SWBT shall provide, at no additional charge, a straight line
                  listing of the LSP end user in the appropriate SWBT local
                  White Pages. Subscriber listing information on resold lines
                  shall remain the property of SWBT.

         2.5      Additional Listing services (e.g., foreign or signature
                  listings) can be purchased by LSP for its end users on a per
                  listing basis. LSP shall pay SWBT amounts attributable to
                  Additional Listing services used by LSP's end users. The
                  exhibits outline the discounts associated with such additional
                  listing services.

         2.6      SWBT or its agents will deliver local White Pages directories
                  to LSP end user's premises at the same time and under the same
                  conditions that such directories are delivered to SWBT end
                  users.

                  2.6.1    LSP end users shall be entitled to one directory per
                           basic residential or business line provided by SWBT
                           pursuant to this Appendix.

                  2.6.2.   SWBT, or its agents, shall deliver a White Pages
                           Directory to LSP end users' premises at the same time
                           that such directories are delivered to SWBT end
                           users. If an LSP's end user already has a current
                           SWBT directory, SWBT shall not be required to deliver
                           a directory to that end user until new directories
                           are published for that end user's location.

         2.7      SWBT shall provide LSP's end users access to SWBT's Operator
                  Services. LSP shall pay SWBT amounts attributable to Operator
                  Services used by LSP's end 


<PAGE>   242
                                                  APPENDIX-RESALE (MO, AR & KS)
                                                                  PAGE 5 OF 12

                  users. Discounts associated with the utilization of Operator
                  Services features are outlined in the exhibits to this
                  Appendix.

3.0      BRANDING

         3.1      Except where otherwise required by law, LSP shall not, without
                  SWBT's written authorization, offer the resale services
                  covered by this Appendix using the trademarks, service marks,
                  trade names, brand names, logos, insignia, symbols or
                  decorative designs of SWBT or its affiliates, nor shall the
                  LSP state or imply that there is any joint business
                  association or similar arrangement with SWBT in the provision
                  of telecommunications services to its own customers. The LSP
                  may brand services included in this Appendix with its own
                  brand name, but SWBT will not provide for LSP branding of
                  those services.

         3.2      Development of Branding Directory Assistance and Operator
                  Services

                  A.       REQUIREMENTS - Pursuant to Section 226 (b) of The
                           Telecommunications Act of 1996, each provider of
                           Operator Services is required to:

                           1. provide its brand at the beginning of each
                              telephone call and before the consumer incurs any
                              charge for the call; and

                           2. disclose immediately to the consumer, upon request
                              a quote of its rates or charges for the call.

                           3. Where SWBT provides LSPs OS and DA services via
                              the same trunk, both the OS and DA calls will be
                              branded with the same brand. Since SWBT's DA and
                              OS utilize the same trunk group, LSP will receive
                              the same brand for both DA/OS. Such branding will
                              be provided pursuant Section B. below.

                  B.       CALL BRANDING - In compliance with A. 1. above, SWBT
                           will brand DA/OS in LSP's name based upon the
                           criteria outlined below:

                           1. LSP will provide SWBT with written specification
                              of its company name to be used in creating LSP
                              specific branding messages for its DA/OS calls.

                           2. An initial non-recurring charge applies per TOPS
                              switch, per load, for the establishment of Call
                              Branding as well as a charge per TOPS switch, per
                              subsequent load to change the brand. In addition,
                              a per call charge applies for every DA/OS call
                              handled by SWBT on behalf of LSP when such
                              services are provided in 


<PAGE>   243
                                                 APPENDIX-RESALE (MO, AR & KS)
                                                                  PAGE 6 OF 12

                              conjunction with resale services. Prices for Call
                              Branding are as outlined in Exhibit C, attached
                              hereto and incorporated herein.

                  C.       RATE/REFERENCE INFORMATION - SWBT will provide LSP
                           DA/OS Rate/Reference Information based upon the
                           criteria outlined below:

                           1. LSP will furnish DA/OS Rate and Reference
                              Information in a mutually agreed to format or
                              media thirty (30) days in advance of the date when
                              the DA/OS Services are to be undertaken.

                           2. LSP will inform SWBT, in writing, of any changes
                              to be made to such Rate/Reference Information ten
                              (10) working days prior to the effective
                              Rate/Reference change date. LSP acknowledges that
                              it is responsible to provide SWBT updated
                              Rate/Reference Information in advance of when the
                              Rates/Reference Information are to become
                              effective.

                           3. In all cases when a SWBT Operator receives a rate
                              request from a LSP end user, SWBT will quote the
                              applicable DA/OS rates as provided by LSP.

                           4. An initial non-recurring charge will apply per
                              TOPS switch for loading of LSP's DA/OS
                              Rate/Reference Information as well as a charge for
                              each subsequent change, per TOPS switch to either
                              the LSP's DA/OS Services Rate or Reference
                              Information as outlined in Exhibit C, attached
                              hereto and incorporated herein.

         3.4      SWBT shall also offer LSP the opportunity to customize route
                  DA/OS beginning March 1, 1997, where technically feasible. LSP
                  agrees to pay SWBT appropriate charges associated with
                  customized routing on an ICB basis.

4.0      RESPONSIBILITIES OF SWBT

         4.1      SWBT shall allow LSP to place service orders and receive phone
                  number assignments (for new lines). These activities shall be
                  accomplished by telephone call or facsimile until electronic
                  interface capability has been established. SWBT, with input
                  from LSP, shall provide interface specifications for
                  electronic access for these functions to LSP once such
                  electronic interfaces become technically feasible and are in
                  place. However, LSP shall be responsible for modifying and
                  connecting any of its systems with SWBT provided interfaces
                  when such interfaces become available, as outlined in Appendix
                  OSS.

         4.2      SWBT shall implement LSP service orders within the same time
                  intervals SWBT uses to implement service orders for similar
                  services for its own end users.
<PAGE>   244
                                                 APPENDIX-RESALE (MO, AR & KS)
                                                                  PAGE 7 OF 12

         4.3      LSP will have the ability to report trouble for its end users
                  to appropriate SWBT trouble reporting centers twenty-four (24)
                  hours a day, seven (7) days a week. LSP will be assigned a
                  customer contact center when initial service agreements are
                  made. LSP end users calling SWBT will be referred to LSP at
                  the number provided by LSP.

                  4.3.1.   Methods and procedures for ordering and trouble
                           reporting are outlined in the Handbook for
                           Non-Switched Based Providers dated 11/15/95, as
                           amended by SWBT from time to time. Both parties agree
                           to abide by the procedures contained therein.

         4.4      SWBT will provide LSP with the detailed billing information in
                  a standard electronic format as outlined in Appendix OSS
                  necessary for LSP to issue a bill to its end users. On no less
                  than sixty (60) days advance written notice, LSP will have the
                  option of receiving daily usage to monitor the patterns of its
                  end users' usage sensitive services. LSP agrees to pay SWBT
                  three tenths of a cent ($.003) per message.

         4.5      SWBT shall make telecommunications services that SWBT provides
                  at retail to subscribers who are not telecommunications
                  carriers available for resale consistent with its obligation
                  under Section 251(c)(4)(A) of the Telecommunications Act. SWBT
                  currently uses the Accessible Letter process to notify LSP of
                  new services available for resale during the term of this
                  Agreement. The notification shall advise LSP of the category
                  in which such new service shall be placed and the same
                  discount already applicable to LSP in that category shall
                  apply to the new service. Should SWBT change its notification
                  procedures to the LSP, the notice will be no less prompt than
                  the Accessible Letter.

                  4.5.1    Furthermore, to the extent that a federal or state
                           regulatory agency adopts a final order establishing
                           wholesale discounts under Section 252(d)(3) of the
                           Telecommunications Act, which is not stayed and which
                           directs SWBT to apply state-specific wholesale
                           discount percentages which are different from those
                           incorporated within this Agreement, either Party
                           shall have the option of converting to that discount
                           level upon ten (10) days written notice to the other
                           Party.

         4.6      LSP end user's activation of Call Trace shall be handled by
                  the SWBT Call Trace Center (CTC) or its Annoying and Anonymous
                  Call Bureau. SWBT shall notify LSP of requests by its end
                  users to provide the call records to the proper authorities.
                  Subsequent communication and resolution of the case with LSP's
                  end user (whether that end user is the victim or the suspect)
                  will be coordinated through the LSP.
<PAGE>   245
                                                 APPENDIX-RESALE (MO, AR & KS)
                                                                  PAGE 8 OF 12

                  4.6.1.   LSP understands that for services where reports are
                           provided to law enforcement agencies (e.g., Call
                           Trace) only billing number and address information
                           shall be provided. It shall be the LSP's
                           responsibility to provide additional information
                           necessary for any police investigation. LSP shall
                           indemnify SWBT against any claims that insufficient
                           information led to inadequate prosecution. SWBT shall
                           handle law enforcement requests consistent with the
                           Miscellaneous-Law Enforcement Section of the
                           Interconnection Agreement.

         4.7      LSP may offer to resell Customer Initiated Suspension and
                  Restoral Service to their end users. SWBT will offer to LSP
                  Company Initiated Suspension service for their own purposes at
                  the SWBT retail tariffed rate. Should LSP choose to suspend
                  their end user through Company Initiated Suspension Service,
                  this suspension period shall not exceed fifteen (15) calendar
                  days. If LSP issues a disconnect on their end user account
                  within the fifteen (15) day period, appropriate services will
                  not be billed for the suspension period. However, should LSP
                  issue a disconnect after the fifteen (15) day suspension
                  period, LSP will be responsible for all appropriate charges on
                  the account back to the suspension date. Should LSP restore
                  their end user, restoral charges at the SWBT retail tariffed
                  rate will apply and LSP will be billed for the appropriate
                  service from the time of suspension.

5.0      RESPONSIBILITIES OF LSP

         5.1      Prior to submitting an order under this Agreement, LSP shall
                  obtain end user authorization as required by applicable state
                  or federal laws and regulations, and assumes responsibility
                  for applicable charges as specified in Section 258(b) of the
                  Telecommunications Act of 1996.
                  SWBT shall abide by the same applicable laws and regulations.

         5.2      Only an end user can initiate a challenge to a change in its
                  local exchange service provider. If an end user notifies SWBT
                  or LSP that the end user requests local exchange service, the
                  Party receiving such request shall be free to immediately
                  provide service to such end user. SWBT shall be free to
                  connect the end user to any local service provider based upon
                  the local service provider's request and local service
                  provider's assurance that proper end user authorization has
                  been obtained. LSP shall make authorization available to SWBT
                  upon request and at no charge.

         5.3      When an end user changes or withdraws authorization, each
                  Party shall release customer-specific facilities in accordance
                  with the end user customer's direction or the direction of the
                  end user's authorized agent. Further, when an end user
                  abandons the premise, SWBT is free to reclaim the facilities
                  for use by another customer and is free to issue service
                  orders required to reclaim such facilities.
<PAGE>   246
                                                 APPENDIX-RESALE (MO, AR & KS)
                                                                  PAGE 9 OF 12

         5.4      Neither Party shall be obligated by this Agreement to
                  investigate any allegations of unauthorized changes in local
                  exchange service (slamming) on behalf of the other Party or a
                  third party. If SWBT, on behalf of LSP, agrees to investigate
                  an alleged incidence of slamming, SWBT shall charge LSP a
                  fifty dollar ($50) investigation fee.

         5.5      When SWBT receives an order from LSP for services under this
                  Agreement and SWBT is currently providing the same services to
                  another local service provider for the same end user, SWBT
                  shall notify the end user's local service provider of record
                  of such order coincident with processing the order, should LSP
                  subscribe to the Local Disconnect Report (LDR) as outlined
                  below. It shall then be the responsibility of the local
                  service provider of record and LSP to resolve any issues
                  related to the end user. This paragraph shall not apply to new
                  additional lines and services purchased by an end user from
                  multiple LSPs or from SWBT.

                  5.5.1    On no less than sixty (60) days notice, LSP may
                           request the LDR., SWBT agrees to furnish to LSP the
                           Billing Telephone Number (BTN), Working Telephone
                           Number (WTN), and terminal number of all end users
                           who have disconnected LSP's service. LSP understands
                           and agrees that the CARE interface will be used to
                           provide such information and such information will
                           only be available via the CARE electronic data
                           transmission as outlined in Appendix OSS. Information
                           will be provided on a per WTN basis to be priced on a
                           per WTN basis. SWBT will provide LSP no less than
                           thirty (30) days notice prior to any change of the
                           per-WTN charge. SWBT grants to LSP a non-exclusive
                           right to use the information provided by SWBT. LSP
                           will not permit anyone but its duly authorized
                           employees or agents to inspect or use this
                           information. LSP agrees to pay SWBT ten cents ($0.10)
                           per WTN and any applicable transmission charges for
                           the LDR.

         5.6      The LSP agrees to hold harmless and indemnify SWBT against any
                  and all liability and claims, including reasonable attorney's
                  fees, that may result from SWBT acting under this Article.

         5.7      LSP is solely responsible for the payment of charges for all
                  services furnished under this Appendix including, but not
                  limited to, calls originated or accepted at LSP's location and
                  its end users' service locations, with the exception of any
                  retail services provided directly by SWBT to the end user
                  which SWBT shall be responsible for billing.

                  5.7.1.   Interexchange carried traffic (e.g., sent-paid,
                           information services and alternate operator services
                           messages) received by SWBT for billing to resold
                           end-user accounts will be returned as unbillable and
                           will not be passed on to LSP for billing. An
                           unbillable code returned with those 


<PAGE>   247
                                                 APPENDIX-RESALE (MO, AR & KS)
                                                                  PAGE 10 OF 12

                           messages to the carrier will indicate that the
                           messages originated from a resold account and will
                           not be billed by SWBT.

         5.8      SWBT shall not be responsible for the manner in which the use
                  of resold service, or the associated charges are allocated to
                  others by LSP. All applicable rates and charges for such
                  services will be billed to and shall be the responsibility of
                  LSP, with the exception of other retail services provided
                  directly to the end user by SWBT as described in paragraph 7
                  above.

                  5.8.1.   Compensation for all services shall be paid
                           regardless of a Party's ability or inability to
                           collect charges from its end user for such service.

         5.9      If LSP does not wish to be responsible for collect, third
                  number billed, toll and information services (e.g., 900)
                  calls, it must order the appropriate blocking for resold lines
                  under this Appendix and pay any applicable charges. LSP
                  acknowledges that blocking is not available for certain types
                  of calls, including 800 numbers.

         5.10     LSP shall be responsible for modifying and connecting any of
                  its systems with SWBT-provided interfaces as described in this
                  Appendix.

         5.11     LSP shall be responsible for providing to its end users and to
                  SWBT a telephone number or numbers that LSP's end users can
                  use to contact LSP in the event of service or repair requests.
                  In the event that LSP's end users contact SWBT with regard to
                  such requests, SWBT shall inform the end user that they should
                  call LSP and may provide LSP contact number. The requirements
                  herein are subject to additional terms and conditions in the
                  Coordinated Repair Calls Section of the Agreement.

6.0      PROCEDURES FOR NONPAYMENT AND DISCONNECTION

         6.1      If LSP fails to pay when due, any and all charges billed to
                  them under this Agreement, including any late payment charges
                  (Unpaid Charges), and any portion of such charges remain
                  unpaid more than fifteen (15) days after the due date of such
                  Unpaid Charges, SWBT shall notify LSP in writing that in order
                  to avoid having service disconnected, LSP must remit all
                  Unpaid Charges to SWBT within fourteen (14) business days.

         6.2      If LSP disputes the billed charges, it shall, within the
                  fourteen (14) day period provided for above, inform SWBT in
                  writing which portion of the charges it disputes, including
                  the specific details and reasons for its dispute; immediately
                  pay to SWBT all undisputed charges; and pay all disputed
                  charges into an interest bearing escrow account.
<PAGE>   248
                                                 APPENDIX-RESALE (MO, AR & KS)
                                                                  PAGE 11 OF 12



         6.3      Disputes hereunder shall be resolved in accordance with the
                  procedures identified in the Dispute Resolution Section of the
                  Interconnection. Failure of LSP to pay charges deemed owed to
                  SWBT after conclusion of the Arbitration shall be grounds for
                  termination under this section.

         6.4      If any LSP charges remain unpaid or undisputed twenty-nine
                  (29) days past the due date, SWBT shall notify LSP, the
                  Commission and the end user's IXC(s) of Record in writing,
                  that unless all charges are paid within sixteen (16) days,
                  LSP's service shall be disconnected and its end users shall be
                  defaulted to SWBT local service. SWBT will also suspend order
                  acceptance at this time.

         6.5      If any LSP charges remain unpaid or undisputed forty (40) days
                  past the due date, LSP shall, at its sole expense, notify its
                  end users, the Commission and the end user's of Record that
                  their service may be disconnected for LSP failure to pay
                  Unpaid Charges, and that its end users must affirmatively
                  select a new local service provider within five (5) days. The
                  notice shall also advise the end user that SWBT will assume
                  the end user's account at the end of the five (5) day period
                  should the end user fail to select a new local service
                  provider.

         6.6      If any LSP charges remain unpaid or undisputed forty-five (45)
                  days past the due date, SWBT shall disconnect LSP and transfer
                  all LSP's end users who have not selected another local
                  service provider directly to SWBT's service. These end users
                  shall receive the same services provided through LSP at the
                  time of transfer. SWBT shall inform the Commission and the and
                  user's IXC(s) of Record of the names of all end users
                  transferred through this process. Applicable service
                  establishment charges for switching end users from LSP to SWBT
                  shall be assessed to LSP.

         6.7      Within five (5) days of the transfer (fifty (50) days past
                  LSP's due date), SWBT shall notify all affected end users that
                  because of an LSP's failure to pay, their service is now being
                  provided by SWBT. SWBT shall also notify the end user that
                  they have thirty (30) days to select a local service provider.

         6.8      SWBT may discontinue service to LSP upon failure to pay
                  undisputed charges as provided in this section, and shall have
                  no liability to LSP or LSP end users in the event of such
                  disconnection.

         6.9      If any end user fails to select a local service provider
                  within thirty (30) days of the change of providers (eighty
                  (80) days past LSP's due date), SWBT shall terminate the end
                  user's service. SWBT shall notify the Commission and the end
                  user's IXC of Record of the names of all end users whose
                  service has been terminated. The end user shall be responsible
                  for any and all charges incurred during the selection period.
<PAGE>   249
                                                 APPENDIX-RESALE (MO, AR & KS)
                                                                  PAGE 12 OF 12



         6.10     Nothing herein shall be interpreted to obligate SWBT to
                  continue to provide service to any such end users. Nothing
                  herein shall be interpreted to limit any and all disconnection
                  rights SWBT may have with regard to such end users.

         6.11     After disconnect procedures have begun, SWBT shall not accept
                  service orders from LSP until all unpaid charges are paid.
                  SWBT shall have the right to require a deposit equal to one
                  month's charges (based on the highest previous month of
                  service from SWBT) prior to resuming service to LSP after
                  disconnect for nonpayment.



<PAGE>   250



EXHIBIT A      SOUTHWESTERN BELL'S RESALE PRODUCT* LIST - RESIDENCE
                                     KANSAS

<TABLE>
<CAPTION>
                                                                 AVOIDED COST DISCOUNTS
LOCAL EXCHANGE SERVICE                                    RECURRING              NON-RECURRING
<S>                                                         <C>                      <C>  
Link Up America Service                                     14.9%                    14.9%
Residence 1 Party                                           14.9%                    14.9%
Res Flat Rate Trunks                                        14.9%                    14.9%

EXPANDED LOCAL CALLING
Expanded Local Calling (Mandatory)                          14.9%                    14.9%
MetroPlus                                                   14.9%                    14.9%

CALL MANAGEMENT SERVICES
Auto Redial                                                 14.9%                    14.9%
Auto Redial - Usage Sensitive                               14.9%                    14.9%
Call Blocker                                                14.9%                    14.9%
Call Forwarding                                             14.9%                    14.9%
Call Forwarding - Busy Line                                 14.9%                    14.9%
Call Forwarding - Busy Line/Don't Answer                    14.9%                    14.9%
Call Forwarding - Don't Answer                              14.9%                    14.9%
Call Return                                                 14.9%                    14.9%
Call Return - Usage Sensitive                               14.9%                    14.9%
Call Trace                                                  14.9%                    14.9%
Call Waiting                                                14.9%                    14.9%
Calling Name                                                14.9%                    14.9%
Calling Number                                              14.9%                    14.9%
Personalized Ring (1 dependent number)                      14.9%                    14.9%
Personalized Ring (2 dependent numbers-1st number)          14.9%                    14.9%
Personalized Ring (2 dependent numbers-2nd number)          14.9%                    14.9%
Preferred Number Service                                    14.9%                    14.9%
Priority Call                                               14.9%                    14.9%
Remote Access to Call Forwarding                            14.9%                    14.9%
Selective Call Forwarding                                   14.9%                    14.9%
Simultaneous Call Forwarding                                14.9%                    14.9%
Speed Calling 8                                             14.9%                    14.9%
Three Way Calling                                           14.9%                    14.9%

AIN
Selective Call Acceptance                                   14.9%                    14.9%
</TABLE>


*Some products not available in all areas.
 Resale products available subject to state and federal rules, regulations, and
 tariffs.



<PAGE>   251


EXHIBIT A      SOUTHWESTERN BELL'S RESALE PRODUCT* LIST - RESIDENCE
                                     KANSAS

<TABLE>
<CAPTION>
                                                                   AVOIDED COST DISCOUNTS
                                                           RECURRING              NON-RECURRING
<S>                                                          <C>                      <C>  
DIRECTORY ASSISTANCE SERVICES                                14.9%                    14.9%
ISDN
Digiline(sm)                                                 14.9%                    14.9%

OTHER
Customer Alerting Enablement                                 14.9%                    14.9%
Grandfathered Services                                       14.9%                    14.9%
Hot Line                                                     14.9%                    14.9%
Hunting                                                      14.9%                    14.9%
Improved Data Transmission Service                           14.9%                    14.9%
Local Operator Assistance Service                            14.9%                    14.9%
Packages                                                     14.9%                    14.9%
Promotions (greater than 90 days)                            14.9%                    14.9%
Preferred Number Service                                     14.9%                    14.9%
Second Line Control                                          14.9%                    14.9%
Toll Restriction                                             14.9%                    14.9%
Touch Tone                                                   14.9%                    14.9%
Voice Dial                                                   14.9%                    14.9%
Warm Line                                                    14.9%                    14.9%

TOLL
900 Call Restriction                                         14.9%                    14.9%
Home 800(sm)                                                 14.9%                    14.9%
IntraLATA MTS                                                14.9%                    14.9%
Toll Billing Exception                                       14.9%                    14.9%

NON-TELECOMMUNICATION SERVICES
Bill Plus(sm)                                                14.9%                    14.9%
Consolidated Billing                                         14.9%                    14.9%
Company Initiated Suspension and Restoral Service             0.0%                     0.0%
Customer Initiated Suspension and Restoral Service            0.0%                     0.0%
Enhanced Directory Listings                                  14.9%                    14.9%
</TABLE>


*Some products not available in all areas.
 Resale products available subject to state and federal rules, regulations, and
 tariffs.



<PAGE>   252


EXHIBIT B         SOUTHWESTERN BELL'S RESALE PRODUCT* LIST - BUSINESS
                                     KANSAS

<TABLE>
<CAPTION>
                                                                   AVOIDED COST DISCOUNTS
                                                           RECURRING              NON-RECURRING
LOCAL EXCHANGE SERVICE
<S>                                                          <C>                      <C> 
Business 1 Party                                             14.9%                    14.9%
Business - Multi-Line                                        14.9%                    14.9%
Business - Message Rate 1 Party                              14.9%                    14.9%
Semi Public Coin Telephone Service                           14.9%                    14.9%
Semi Public Coinless Telephone Service                       14.9%                    14.9%
Semi Public Coinless - Outward only                          14.9%                    14.9%
Semi Public Outgoing Only/1 Way Originating only             14.9%                    14.9%

TRUNKS
Analog Trunk                                                 14.9%                    14.9%
DID                                                          14.9%                    14.9%
Digital Trunk                                                14.9%                    14.9%
Hotel/Motel Message Trunks                                   14.9%                    14.9%

EXPANDED LOCAL CALLING
Expanding Local Calling (Mandatory)                          14.9%                    14.9%
MetroPlus                                                    14.9%                    14.9%

CALL MANAGEMENT SERVICES
Auto Redial                                                  14.9%                    14.9%
Auto Redial - Usage Sensitive                                14.9%                    14.9%
Call Blocker                                                 14.9%                    14.9%
Call Forwarding                                              14.9%                    14.9%
Call Forwarding - Busy Line                                  14.9%                    14.9%
Call Forwarding - Busy Line/Don't Answer                     14.9%                    14.9%
Call Forwarding - Don't Answer                               14.9%                    14.9%
Call Return                                                  14.9%                    14.9%
Call Return - Usage Sensitive                                14.9%                    14.9%
Call Trace                                                   14.9%                    14.9%
Call Waiting                                                 14.9%                    14.9%
Calling Name                                                 14.9%                    14.9%
Calling Number                                               14.9%                    14.9%
Personalized Ring (1 dependent number)                       14.9%                    14.9%
Personalized Ring (2 dependent numbers-1st number)           14.9%                    14.9%
Personalized Ring (2 dependent numbers-2nd number)           14.9%                    14.9%
Priority Call                                                14.9%                    14.9%
Remote Access to Call Forwarding                             14.9%                    14.9%
Selective Call Forwarding                                    14.9%                    14.9%
Simultaneous Call Forwarding                                 14.9%                    14.9%
Speed Calling 30                                             14.9%                    14.9%
Three Way Calling                                            14.9%                    14.9%
</TABLE>


*Some products not available in all areas.
 Resale products available subject to state and federal rules, regulations, 
 and tariffs





<PAGE>   253


EXHIBIT B            SOUTHWESTERN BELL'S RESALE PRODUCT* LIST - BUSINESS
                                     KANSAS

<TABLE>
<CAPTION>
                                                                    AVOIDED COST DISCOUNTS
                                                              RECURRING              NON-RECURRING
DID
<S>                                                             <C>                      <C> 
DID (First Block of 100)                                        14.9%                    14.9%
DID (First Block of 10)                                         14.9%                    14.9%
DID (Ea. adl. block of 10 after first 10)                       14.9%                    14.9%
DID (Ea. adl. block of 100 after first 100)                     14.9%                    14.9%
DID (with dial pulse)                                           14.9%                    14.9%
DID (with Multifrequency)                                       14.9%                    14.9%
DID (with Dual-Tone Multifrequency)                             14.9%                    14.9%

AIN
Area Wide Networking                                            14.9%                    14.9%
Caller Intellidata(R)                                           14.9%                    14.9%
Disaster Routing Service                                        14.9%                    14.9%
Intelligent Redirect(sm)                                        14.9%                    14.9%
IntelliNumber(SM)                                               14.9%                    14.9%
Positive ID                                                     14.9%                    14.9%
Selective Call Acceptance                                       14.9%                    14.9%

OTHER
Busy Out Arrangement                                            14.9%                    14.9%
Customer Alerting Enablement                                    14.9%                    14.9%
Grandfathered Services                                          14.9%                    14.9%
Foreign Exchange                                                14.9%                    14.9%
Foreign Serving Office                                          14.9%                    14.9%
Frame Relay                                                     14.9%                    14.9%
Hot Line                                                        14.9%                    14.9%
Hunting                                                         14.9%                    14.9%
Improved Data Transmission Service                              14.9%                    14.9%
Local Operator Assistance Service                               14.9%                    14.9%
MicroLink I(R)                                                  14.9%                    14.9%
Multi Pt. Video                                                 14.9%                    14.9%
Network Reconfiguration Service                                 14.9%                    14.9%
Night Number associated with a Terminal                         14.9%                    14.9%
Night Number associated with Telephone Number                   14.9%                    14.9%
Packages                                                        14.9%                    14.9%
Promotions (greater than 90 days)                               14.9%                    14.9%
Telebranch(R)                                                   14.9%                    14.9%
Telephone Answering Secretarial                                 14.9%                    14.9%
Toll Restriction                                                14.9%                    14.9%
Touch Tone (Business)                                           14.9%                    14.9%
Touch Tone (Trunk)                                              14.9%                    14.9%
Voice Dial                                                      14.9%                    14.9%
Warm Line                                                       14.9%                    14.9%
</TABLE>


*Some products not available in all areas.
 Resale products available subject to state and federal rules, regulations, 
 and tariffs



<PAGE>   254


EXHIBIT B               SOUTHWESTERN BELL'S RESALE PRODUCT* LIST - BUSINESS
                                     KANSAS


<TABLE>
<CAPTION>
                                                                   AVOIDED COST DISCOUNTS
                                                             RECURRING              NON-RECURRING
ISDN
<S>                                                            <C>                      <C>  
Digiline(sm)                                                   14.9%                    14.9%
Select Video Plus(R)                                           14.9%                    14.9%
Smart Trunk(sm)                                                14.9%                    14.9%

DIRECTORY ASSISTANCE SERVICES

TOLL
900 Call Restriction                                           14.9%                    14.9%
IntraLATA MTS                                                  14.9%                    14.9%
MaxiMizer 800(R)                                               14.9%                    14.9%
OutWATS                                                        14.9%                    14.9%
Toll Billing Exception                                         14.9%                    14.9%

PLEXAR(R)
Plexar I(R)                                                    14.9%                    14.9%
Plexar II(R)                                                   14.9%                    14.9%

NON-TELECOMMUNICATION SERVICES
Bill Plus(sm)                                                  14.9%                    14.9%
Consolidated Billing                                           14.9%                    14.9%
Company Initiated Suspension and Restoral Service               0.0%                     0.0%
Customer Initiated Suspension and Restoral Service              0.0%                     0.0%
Enhanced Directory Listings                                    14.9%                    14.9%
</TABLE>


*Some products not available in all areas.
 Resale products available subject to state and federal rules, regulations, 
 and tariffs



<PAGE>   255


                                                    APPENDIX RESALE - EXHIBIT C
                                                                    PAGE 1 OF 1


                           APPENDIX RESALE - EXHIBIT C
                                     KANSAS
                   OS/DA PRICING - BRANDING, RATE & REFERENCE

The following rates will apply for each service element:

- --------------------------------------------------------------------------------
A.  CALL BRANDING

An initial non-recurring charge applies per TOPS switch, per brand for the
establishment of LSP specific Call Branding. A Per Call charge also applies.
When there are subsequent changes to the branding announcement, an additional
non-recurring charge will also apply per change.

                               Rate per initial load group        $2,100.00
                            Rate per load for Brand change        $2,100.00
                                                  Per Call            $0.02

- --------------------------------------------------------------------------------
B.  DIRECTORY ASSISTANCE RATE/REFERENCE
         INFORMATION

An initial non-recurring charge applies per TOPS switch for the initial load of
LSP's DA Services Rate/Reference Information. An additional non-recurring charge
applies for each subsequent change to Rate/Reference Information.

                                     Rate per initial load         $3,375.00
                           Rate per subsequent rate change         $2,375.00
                      Rate per subsequent reference change         $2,375.00
                                                                   
- --------------------------------------------------------------------------------
C.  OPERATOR SERVICES RATE/REFERENCE INFORMATION

An initial non-recurring charge applies per TOPS switch for the initial load of
LSP's Operator Services Rate/Reference Information. An additional non-recurring
charge applies for each subsequent change to Rate/Reference Information.

                                      Rate per initial load        $3,375.00
                            Rate per subsequent rate change        $2,375.00
                       Rate per subsequent reference change        $2,375.00
- --------------------------------------------------------------------------------


<PAGE>   256


                                                                  APPENDIX UNE
                                                                 PAGE 2 OF 17







                   APPENDIX: UNBUNDLED NETWORK ELEMENTS (UNE)

I.       Introduction

         A.       This Appendix Unbundled Network Elements to the Agreement sets
                  forth the unbundled Network Elements that SWBT agrees to offer
                  to LSP. The specific terms and conditions that apply to the
                  unbundled Network Elements are described below. The prices for
                  Network Elements are set forth in Appendix Pricing Schedule.

II.      General Terms and Conditions

         A.       SWBT and LSP may agree to connect LSP's facilities with SWBT's
                  network at any technically feasible point for access to
                  unbundled Network Elements for the provision by LSP of a
                  Telecommunications Service. Unbundled Network Elements may not
                  be connected to or combined with SWBT access services or other
                  SWBT tariffed service offerings with the exception of tariffed
                  collocation services.

         B.       SWBT will provide LSP access to the unbundled Network Elements
                  to permit LSP to combine such Network Elements with other
                  Network Elements obtained from SWBT or with network components
                  provided by itself to provide Telecommunications Services to
                  its customers, provided that such combination is technically
                  feasible and would not impair the ability of other carriers to
                  obtain access to other unbundled network elements or to
                  interconnect with SWBT's network. Any request by LSP for SWBT
                  to provide a type of connection between Network Elements that
                  is not currently being utilized in the SWBT network and is not
                  otherwise provided for under this Agreement will be made in
                  accordance with the Bona Fide Request process described in
                  Section III.

         C.       When LSP orders unbundled network elements, SWBT will perform
                  the functions necessary to combine unbundled network elements
                  in any manner required by law, even if those elements are not
                  ordinarily combined in SWBT's network, provided that such
                  combination is a) technically feasible; and b) would not
                  impair the ability of other carriers to obtain access to
                  unbundled network elements or to interconnect with SWBT's
                  network as provided in F.C.C. Rule 51.315 (c).

         D.       LSP is responsible to designate each network element being
                  ordered from SWBT and how those network elements are to be
                  combined. Where multiple SWBT network elements are to be
                  combined, LSP must designate the order in which the elements
                  are to be connected. Where SWBT network elements are to be
                  connected to another carrier's network element(s), LSP will
                  designate how SWBT network element(s) are to be 


<PAGE>   257

                                                                  APPENDIX UNE
                                                                 PAGE 3 OF 17


                  connected (i.e., cross connected) to the network element(s) of
                  the other telecommunications carrier.

         E.       Various subsections below list the Network Elements that LSP
                  and SWBT have identified as of the Effective Date of this
                  Agreement. SWBT will upon request of LSP and to the extent
                  technically feasible provide LSP additional Network Elements
                  or modifications to previously identified Network Elements for
                  the provision by LSP of a Telecommunications Service. Such
                  requests will be processed in accordance with the Bona Fide
                  Request process.

         F.       Unbundled Network Elements are provided under this agreement
                  over such routes, technologies, and facilities as SWBT may
                  elect at its own discretion. If LSP requests special
                  facilities, equipment or routing of unbundled network elements
                  such requests will be handled under the Bona Fide Request
                  process.

         G.       Subject to the terms herein, SWBT is responsible only for the
                  installation, operation and maintenance of the Network
                  Elements it provides. SWBT is not otherwise responsible for
                  the Telecommunications Services provided by LSP through the
                  use of those elements.

         H.       Where unbundled elements provided to LSP are dedicated to a
                  single end user, if such elements are for any reason
                  disconnected they will be made available to SWBT for future
                  provisioning needs. The LSP agrees to relinquish control of
                  any such unbundled element concurrent with the disconnection
                  of a LSPs end user's service.

         I.       The Parties acknowledge that the Commission may decline to
                  require unbundling of Network Elements beyond those identified
                  in 47 CFR Section 51.319 if the Commission concludes that: (1)
                  such Network Element is proprietary or contains proprietary
                  information that will be revealed if such Network Element is
                  provided to LSP on an unbundled basis, and LSP could offer the
                  same proposed Telecommunications Service through the use of
                  other, nonproprietary Network Elements within SWBT's network;
                  or (2) the Commission concludes that the failure of SWBT to
                  provide access to such Network Element would not decrease the
                  quality of, and would not increase the financial or
                  administrative cost of, the Telecommunications Service LSP
                  seeks to offer, compared with providing that service over
                  other unbundled Network Elements in SWBT's network.

         J.       LSP will, upon request of SWBT, and to the extent technically
                  feasible, provide SWBT access to Network Elements for the
                  provision of SWBT's telecommunications services in accordance
                  with the Act. Such request by SWBT will be processed in
                  accordance with the Bona Fide Request process.
<PAGE>   258

                                                                  APPENDIX UNE
                                                                 PAGE 4 OF 17



         K.       Each Party is solely responsible for the services it provides
                  to its end users and to other Telecommunications Carriers.

         L.       Network elements provided to LSP under the provisions of this
                  Appendix will remain the property of SWBT.

         M.       SWBT will provide network elements where technically feasible.
                  Where facilities and equipment are not available, LSP may
                  request and, to the extent required by law and as SWBT may
                  otherwise agree, SWBT may provide Network Elements through the
                  Bona Fide Request process.

         N.       The elements provided pursuant to this Agreement will be
                  available to SWBT at times mutually agreed upon in order to
                  permit SWBT to make tests and adjustments appropriate for
                  maintaining the services in satisfactory operating condition.
                  No credit will be allowed for any interruptions involved
                  during such tests and adjustments.

         O.       LSP's use of any SWBT network element, or of its own equipment
                  or facilities in conjunction with any SWBT network element,
                  will not materially interfere with or impair service over any
                  facilities of SWBT, its affiliated companies or its connecting
                  and concurring carriers involved in its services, cause damage
                  to their plant, impair the privacy of any communications
                  carried over their facilities or create hazards to the
                  employees of any of them or the public. Upon reasonable
                  written notice and opportunity to cure, SWBT may discontinue
                  or refuse service if LSP violates this provision.

         P.       When converting a SWBT account to an LSP account or between
                  LSP and another provider, the conversion will be handled as a
                  disconnect of the current account and a new connect of the
                  unbundled network elements account.

         Q.       Performance of Network Elements

                  1.       Each Network Element provided by SWBT to LSP will
                           meet applicable regulatory performance standards and
                           be at least equal in quality and performance as that
                           which SWBT provides to itself. Each Network Element
                           will be provided in accordance with SWBT Technical
                           Publications or other written descriptions, if any,
                           as changed from time to time by SWBT at its sole
                           discretion. LSP may request, and SWBT will provide,
                           to the extent technically feasible, Network Elements
                           that are superior or lesser in quality than SWBT
                           provides to itself and such service will be requested
                           pursuant to the Bona Fide Request process.

                  2.       Nothing in this Agreement will limit either Party's
                           ability to modify its network through the
                           incorporation of new equipment, new software or
                           otherwise. Each Party will provide the other 


<PAGE>   259

                                                                  APPENDIX UNE
                                                                  PAGE 5 OF 17



                           Party written notice of any such upgrades in its
                           network which will materially impact the other
                           Party's service consistent with the timelines
                           established by the FCC in the Second Report and
                           Order, CC Docket 96-98. LSP will be solely
                           responsible, at its own expense, for the overall
                           design of its telecommunications services and for any
                           redesigning or rearrangement of its
                           telecommunications services which may be required
                           because of changes in facilities, operations or
                           procedure of SWBT, minimum network protection
                           criteria, or operating or maintenance characteristics
                           of the facilities.

         R.       LSP will connect equipment and facilities that are compatible
                  with the SWBT Network Elements and will use Network Elements
                  in accordance with the applicable regulatory standards and
                  requirements referenced in paragraph II, Q.

III.     Bona Fide Request

         A.       Sections IV - XI below identify specific unbundled Network
                  Elements and provide the terms and conditions on which SWBT
                  will offer them to LSP. Any request by LSP for an additional
                  unbundled Network Element, or modifications to previously
                  identified Network Elements, both to the extent technically
                  feasible, will be considered under this Bona Fide Request
                  process. Where facilities and equipment are not available, LSP
                  may request and SWBT may agree to provide, Network Elements
                  through the Bona Fide Request process.

         B.       Each Party will promptly consider and analyze access to new
                  unbundled Network Element with the submission of a Network
                  Element Bona Fide Request hereunder. The Network Element Bona
                  Fide Request process set forth herein does not apply to those
                  services requested pursuant to Report & Order and Notice of
                  Proposed Rulemaking 91-141 (rel. Oct. 19, 1992) paragraph 259
                  and n. 603 and subsequent rulings.

         C.       A Network Element Bona Fide Request will be submitted in
                  writing and will include a technical description of each
                  requested Network Element, the date when interconnection is
                  requested and the projected quantity of interconnection points
                  ordered with a demand forecast.

         D.       The requesting Party may cancel a Network Element Bona Fide
                  Request at any time, but will pay the other Party's reasonable
                  and demonstrable costs of processing and/or implementing the
                  Network Element Bona Fide Request up to the date of
                  cancellation.

         E.       Within ten (10) business days of its receipt, the receiving
                  Party will acknowledge receipt of the Network Element Bona
                  Fide Request.
<PAGE>   260

                                                                  APPENDIX UNE
                                                                  PAGE 6 OF 17

         F.       Except under extraordinary circumstances, within thirty (30)
                  days of its receipt of a Network Element Bona Fide Request,
                  the receiving Party will provide to the requesting Party a
                  preliminary analysis of such Network Element Bona Fide
                  Request. The preliminary analysis will confirm that the
                  receiving Party will offer access to the Network Element or
                  will provide a detailed explanation that access to the Network
                  Element is not technically feasible and/or that the request
                  does not qualify as a Network Element that is required to be
                  provided under the Act.

         G.       If the receiving Party determines that the Network Element
                  Bona Fide Request is technically feasible and otherwise
                  qualifies under the Act, it will promptly proceed with
                  developing the Network Element Bona Fide Request upon receipt
                  of written authorization from the requesting Party. When it
                  receives such authorization, the receiving Party shall
                  promptly develop the requested services, determine their
                  availability, calculate the applicable prices and establish
                  installation intervals.

         H.       Unless the Parties otherwise agree, the Network Element Bona
                  Fide Request must be priced in accordance with Section
                  252(d)(1) of the Act.

         I.       As soon as feasible, but not more than ninety (90) days after
                  its receipt of authorization to proceed with developing the
                  Network Element Bona Fide Request, the receiving Party shall
                  provide to the requesting Party a Network Element Bona Fide
                  Request quote which will include, at a minimum, a description
                  of each Network Element, the availability, the applicable
                  rates and the installation intervals.

         J.       Within thirty (30) days of its receipt of the Network Element
                  Bona Fide Request quote, the requesting Party must either
                  confirm its order for the Network Element Bona Fide Request
                  pursuant to the Network Element Bona Fide Request quote or
                  seek arbitration by the Commission pursuant to Section 252 of
                  the Act.

         K.       If a Party to a Network Element Bona Fide Request believes
                  that the other Party is not requesting, negotiating or
                  processing the Network Element Bona Fide Request in good
                  faith, or disputes a determination, or price or cost quote,
                  such Party may seek mediation or arbitration by the Commission
                  pursuant to Section 252 of the Act.

IV.      Network Interface Device

         A.       The Network Interface Device (NID) is a cross-connect used to
                  connect loop facilities to inside wiring. The fundamental
                  function of the NID is to establish the official network
                  demarcation point between a carrier and its end-user customer.
                  The NID contains the appropriate and accessible connection
                  points or posts to which the service provider and the end-user
                  customer each make its connections.
<PAGE>   261

                                                                  APPENDIX UNE
                                                                  PAGE 7 OF 17

         B.       LSP may connect to the customer's inside wire at the SWBT NID,
                  as is, at no charge. Any repairs, upgrade and rearrangements
                  required by LSP will be performed by SWBT based on time and
                  material charges.

         C.       LSP will provide its own NID and will interface to the
                  customer's premises wiring through connections in the customer
                  chamber of the SWBT NID.

         D.       With respect to multiple dwelling units or multiple-unit
                  business premises, LSP will provide its own NID, will connect
                  directly with the customer's inside wire and will not require
                  any connection to the SWBT NID, unless such premises are
                  served by "single subscriber" type NIDs.

         E.       The SWBT NIDs that LSP uses under this Appendix will be those
                  installed by SWBT to serve its customers.

         F.       LSP will not attach to or disconnect SWBTs ground. LSP will
                  not cut or disconnect SWBT's loop from its protector. LSP will
                  not cut any other leads in the NID. LSP will protect all
                  disconnected leads with plastic sleeves and will store them
                  within the NID enclosure. LSP will tighten all screws or lugs
                  loosened by LSP in the NID's enclosure and replace all
                  protective covers.

V.       Local Loop

         A.       A "loop" is a dedicated transmission facility between a
                  distribution frame (or its equivalent) in a SWBT central
                  office and an end user customer premises.

         B.       SWBT will provide at the rates, terms, and conditions set out
                  in Appendix Pricing Schedule the following:

                  1.       The 2-Wire analog loop supports analog voice
                           frequency, voice band services with loop start
                           signaling within the frequency spectrum of
                           approximately 300 Hz and 3000 Hz.

                  2.       SWBT will offer 5 dB conditioning on a 2-wire analog
                           loop as the standard conditioning option available.

                  3.       The 4-Wire analog loop provides a non-signaling voice
                           band frequency spectrum of approximately 300 Hz to
                           3000 Hz. The 4-Wire analog loop provides separate
                           transmit and receive paths.

                  4.       The 2-Wire digital loop 160 Kbps supports Basic Rate
                           ISDN (BRI) digital exchange services. The 2-Wire
                           digital loop 160 Kbps supports usable bandwidth up to
                           160 Kbps.

                  5.       The 4-Wire digital loop 1.544 Mbps will support DS1
                           service including Primary Rate ISDN (PRI). The 4-wire
                           digital loop 1.544 Mbps supports usable bandwidth up
                           to 1.544 Mbps.
<PAGE>   262

                                                                  APPENDIX UNE
                                                                  PAGE 8 OF 17

         C.       If LSP requests one or more unbundled Loops serviced by
                  Integrated Digital Loop Carrier (IDLC) or Remote Switching
                  technology, SWBT will, where available, move the requested
                  unbundled Loop(s) to a spare, existing physical or a universal
                  digital loop carrier unbundled Loop at no additional charge to
                  LSP. If, however, no spare unbundled Loop is available, SWBT
                  will within two business days, excluding weekends and
                  holidays, of LSP's request notify LSP of the lack of available
                  facilities. LSP may request alternative arrangements through
                  the Bona Fide Request process.

         D.       In addition to any liability provisions in this agreement,
                  SWBT does not guarantee or make any warranty with respect to
                  unbundled loops when used in an explosive atmosphere. LSP will
                  indemnify, defend and hold SWBT harmless from any and all
                  claims by any person relating to LSP's or LSP end user's use
                  of unbundled loops in an explosive atmosphere.

VI.      Local Switching

         A.       The local switching element encompasses line-side and trunk
                  side facilities plus the features, functions and capabilities
                  of the switch. The line side facilities include the connection
                  between a loop termination at, for example, a main
                  distribution frame (MDF), and a switch line card. Trunk-side
                  facilities include the connection between, for example, trunk
                  termination at a trunk-side cross-connect panel and a trunk
                  card. The local switching element includes all features,
                  functions, and capabilities of the local switch, including but
                  not limited to the basic switching function of connecting
                  lines to lines, lines to trunks, trunks to lines and trunks to
                  trunks. It also includes the same basic capabilities that are
                  available to SWBT customers, such as a telephone number, dial
                  tone, signaling and access to 911, operator services,
                  directory assistance, and features and functions necessary to
                  provide services required by law. In addition, the local
                  switching element includes all vertical features that the
                  switch is capable of providing, including custom calling,
                  CLASS features, and centrex-like capabilities.

         B.       SWBT will route InterLATA calls as defined by the exchange
                  dialing plan via the existing PIC process when LSP uses Local
                  Switching elements. Until such time that the commission
                  mandates intraLATA presubscription, SWBT will route IntraLATA
                  Toll calls as defined by the exchange dialing plan when LSP
                  uses Local Switching elements and will provide intraLATA toll
                  to LSP without other usage sensitive charges. When the
                  commission mandates intraLATA presubscription, SWBT will route
                  IntraLATA Toll calls to the presubscribed carrier.
<PAGE>   263

                                                                  APPENDIX UNE
                                                                  PAGE 9 OF 17

         C.       When LSP requests Unbundled Common Transport, SWBT's Local
                  Switching element will route local calls on SWBT's common
                  network to the appropriate trunk or lines for call origination
                  or termination.

         D.       SWBT will provide the Local Switching element only with
                  standard central office treatments (e.g., busy tones, vacant
                  codes, fast busy, etc.), supervision and announcements.

         E.       SWBT will control congestion points such as those caused by
                  radio station call-ins, and network routing abnormalities,
                  using capabilities such as Automatic Call Gapping, Automatic
                  Code Gapping, Automatic Congestion Control, and Network
                  Routing Overflow. LSP agrees to respond to SWBT's
                  notifications regarding network congestion.

         F.       SWBT will provide switch interfaces to adjuncts in the same
                  manner it provides them to itself. LSP requests for use of
                  SWBT adjuncts will be handled through the Bona Fide Request
                  process.

         G.       SWBT will allow LSP to designate the features and functions
                  that are activated on a particular unbundled switch port to
                  the extent such features and functions are available or as may
                  be requested by the Bona Fide Request process.

         H.       Switch Ports

                  1.       Analog Line Port: A line side switch connection
                           available in either a loop or ground start signaling
                           configuration used primarily for Switched voice
                           communications.

                  2.       Analog (DID) Trunk Port: A trunk side switch
                           connection used for voice communications via customer
                           premises equipment primarily provided by a Private
                           Branch Exchange (PBX) switch.

                  3.       ISDN Basic Rate Interface (BRI) Port: A line side
                           switch connection which provides ISDN Basic Rate
                           Interface (BRI) based capabilities.

                  4.       ISDN Primary Rate Interface (PRI) Trunk Side Port:
                           trunk side switch connection which provides Primary
                           Rate Interface (PRI) ISDN Exchange Service
                           capabilities.

VII.     Tandem Switching

         A.       Tandem Switching is defined as: (1) trunk-connect facilities,
                  including but not limited to the connection between trunk
                  termination at a cross-connect panel and a switch trunk card,
                  (2) the basic switching function of connecting trunks to
                  trunks; and (3) all technically feasible functions that are
                  centralized in tandem switches (as distinguished from separate
                  end-office switches), including but not limited to call
                  recording, the routing of calls to operator services, and
                  signaling conversion features.
<PAGE>   264

                                                                  APPENDIX UNE
                                                                  PAGE 10 OF 17

         B.       Tandem Switching will provide trunk to trunk connections for
                  local calls between two end offices.

         C.       To the extent all signaling is SS7, Tandem Switching will
                  preserve CLASS/LASS features and Caller ID as traffic is
                  processed. Additional signaling information and requirements
                  are provided in Section IX.

  VIII.  Interoffice Transport

         A.       The Interoffice Transport network element is defined as SWBT
                  interoffice transmission facilities dedicated to a particular
                  customer or carrier, or shared by more than one customer or
                  carrier, that provide telecommunications between wire centers
                  owned by SWBT or LSP, or between switches owned by SWBT or
                  LSP. Interoffice Transport includes Common Transport and
                  Dedicated Transport.

         B.       SWBT will be responsible for the engineering, provisioning,
                  and maintenance of the underlying equipment and facilities
                  that are used to provide Interoffice Transport.

         C.       Common Transport - Common Transport is a shared interoffice
                  transmission path between SWBT switches. Common Transport will
                  permit LSP to connect its Unbundled Local Switching element
                  purchased from SWBT with Common Transport to transport the
                  local call dialed by the Unbundled Local Switching element to
                  its destination through the use of SWBT's common transport
                  network. Common Transport will also permit LSP to utilize
                  SWBT's common network between a SWBT tandem and a SWBT end
                  office.

         D.       Dedicated Transport

                  1.       Dedicated Transport is an interoffice transmission
                           path dedicated to a particular customer or carrier
                           that provides telecommunications between wire centers
                           owned by SWBT or LSP, or between switches owned by
                           SWBT or LSP.

                  2.       SWBT will offer Dedicated Transport as a circuit
                           (e.g., DS1, DS3) dedicated to LSP.

                  3.       SWBT will provide Dedicated Transport at the
                           following speeds: DS1 (1.544 Mbps), DS3 (45 Mbps),
                           OC3 (155.520 Mbps) and OC12 (622.080 Mbps). In
                           addition, SWBT offers OC48 (2488.320 Mbps) bandwidth
                           as an option for interoffice capacity.

                  4.       In addition to any liability provisions in this
                           agreement, SWBT does not guarantee or make any
                           warranty with respect to entrance facilities when
                           used in an explosive atmosphere. LSP will indemnify,
                           defend and hold SWBT harmless from any and all 
<PAGE>   265

                                                                  APPENDIX UNE
                                                                 PAGE 11 OF 17

                           claims by any person relating to LSP's or LSP end
                           user's use of unbundled loops in an explosive
                           atmosphere.

         E.       Digital Cross-Connect System (DCS) - SWBT will offer Digital
                  Cross-Connect System (DCS) in conjunction with the unbundled
                  dedicated transport element with the same functionality that
                  is offered to interexchange carriers.

IX.      Signaling Networks and Call-Related Databases - Signaling Networks and
         Call-Related Databases are Network Elements that includes Signaling
         Link Transport, Signaling Transfer Points, and Service Control Points
         and Call-Related Databases. Access to SWBT's signaling network and call
         related databases will be provided as described in the following
         Appendices: SS7, LIDB Validation, LIDB, CNAM, 800, and AIN.

X.       Operations Support Systems Functions

         A.       Operations Support Systems Functions consist of pre-ordering,
                  ordering, provisioning, maintenance and repair, and billing
                  functions supported by SWBT's databases and information.

         B.       SWBT will provide LSP access to its Operations Support Systems
                  Functions as outlined in Appendix OSS.

XI.      Cross Connects

         A.       The cross connect is the media between the SWBT distribution
                  frame and an LSP designated collocation or to other SWBT
                  unbundled network elements purchased by LSP.

         B.       SWBT offers a choice of four types of cross connects with each
                  unbundled loop type. The applicable cross connects are as
                  follows:

                  1.       Cross connect to DCS
                  2.       Cross connect to MUX
                  3.       Cross connect to Collocation
                  4.       Cross connect to Switch Port

         C.       Cross connects must also be ordered with Unbundled Dedicated
                  Transport (UDT).

                  1.       The LSP must specify when placing an UDT order, in
                           what order the unbundled network components are to be
                           connected.

                  2.       The Cross Connect being requested must have a
                           compatible interface to each of the elements which
                           the Cross Connect is joining together.

                  3.       The following cross connects are available with UDT:

                           a) Voice Grade 2-Wire 
                           b) Voice Grade 4-Wire 
<PAGE>   266

                                                                  APPENDIX UNE
                                                                 PAGE 12 OF 17

                           c) DS0 - DCS to Collocation 
                           d) DS1 
                           e) DS3 
                           f) OC3 
                           g) OCI2 
                           h) OC48

  XII.   Pricing

         A.       Attached hereto as Appendix Pricing Schedule is a schedule
                  which reflects the prices at which SWBT agrees to furnish
                  Unbundled Network Elements to LSP. LSP agrees to compensate
                  SWBT for unbundled Network elements at the rates contained in
                  this Appendix. Unbundled Network Elements are available from
                  SWBT on a per unbundled Network Element basis at prices as
                  contained in Appendix Pricing Schedule.

         B.       For any rate element and/or charge contained in or referenced
                  to in this Appendix that are not listed in the attached
                  Appendix Pricing Schedule, including Bona Fide Requests, SWBT
                  and LSP will negotiate prices.

         C.       Unless otherwise stated, SWBT will render a monthly bill for
                  Network Elements provided hereunder. Remittance in full will
                  be due within thirty (30) days of receipt of invoice. Interest
                  will apply on overdue amounts.

         D.       SWBT will recover the costs of modifying its outside plant
                  facilities for LSP space requirements. These costs will be
                  recovered via the Bona Fide Request process described herein.

         E.       Recurring Charges

                  1.       Unless otherwise listed below, where Rates are shown
                           as monthly, a month will be defined as a calendar
                           month. The minimum term for each monthly rated
                           element will be one (1) month. After the initial
                           month, billing will be on the basis of whole or
                           fractional months used. The minimum service period
                           for elements provided under the Bona Fide Request
                           process may be longer.

                  2.       When an unbundled network element with a minimum
                           period greater than one month is discontinued prior
                           to the expiration of the minimum period, the
                           applicable charge will be the total monthly charges,
                           for the remainder of the minimum period.

                  3.       The minimum service period for unbundled dedicated
                           transport elements is 12 months.

                  4.       Where rates will be based on minutes of use, usage
                           will be accumulated at the end office or other
                           measurement point without any per call rounding and
                           total minutes by end office are rounded to the next
                           higher minute. LSP will pay for all usage on such
                           calls 
<PAGE>   267

                                                                  APPENDIX UNE
                                                                 PAGE 13 OF 17

                           including those that are not completed due to busy or
                           don't answer conditions.

                  5.       Where rates are based on miles, the mileage will be
                           calculated on the airline distance involved between
                           the locations. To determine the rate to be billed,
                           SWBT will first compute the mileage using the V&H
                           coordinates method, as set forth in the National
                           Exchange Carrier Association, Inc. Tariff F.C.C. No
                           4. When the calculation results in a fraction of a
                           mile, SWBT will round up to the next whole mile
                           before determining the mileage and applying rates.

         F.       Non-Recurring Charges

                  1.       There are non-recurring charges for the first
                           connection on an LSP order as well as separate
                           non-recurring charges for each additional connection
                           associated with the same LSP order at the same LSP
                           specified premises. When converting the SWBT account
                           to LSP or between LSP and another local service
                           provider, the conversion will be handled as a
                           disconnect of the current account and a new connect
                           of the unbundled network element account.

                  2.       LSP will pay a non-recurring charge when an LSP adds
                           or removes a signaling point code. The rates and
                           charges for Signaling Point Code(s) are identified in
                           the Pricing Schedule. This charge also applies to
                           point code information provided by LSP allowing other
                           telecommunications providers to use LSP's SS7
                           signaling network.

                  3.       A service order processing (Service Order) charge
                           will apply for each service order issued by SWBT to
                           process a request for installation, disconnection,
                           rearrangement, changes to or record orders for
                           unbundled elements.

         G.       Maintenance of Elements

                  1.       The network elements provided by SWBT pursuant to
                           this Appendix will be maintained by SWBT. LSP or
                           others may not rearrange, move, disconnect, remove or
                           attempt to repair any facilities provided by SWBT,
                           other than by connection or disconnection to any
                           interface means used, except with the written consent
                           of SWBT.

                  2.       If trouble occurs with unbundled network elements
                           provided by SWBT, LSP will first determine whether
                           the trouble is in LSP's own equipment and/or
                           facilities or those of the end user. If LSP
                           determines the trouble is in SWBT's equipment and/or
                           facilities, LSP will issue a trouble report to SWBT.
<PAGE>   268

                                                                  APPENDIX UNE
                                                                 PAGE 14 OF 17

                  3.       LSP will pay Time and Material charges when LSP
                           reports a suspected failure of a network element and
                           SWBT dispatches personnel to the end user's premises
                           or a SWBT central office and trouble was not caused
                           by SWBT's facilities or equipment. Time and Material
                           charges will include all technicians dispatched'
                           including technicians dispatched to other locations
                           for purposes of testing.

                  4.       LSP will pay Time and Material charges when SWBT
                           dispatches personnel and the trouble is in equipment
                           or communications systems provided an entity by other
                           than SWBT or in detariffed CPE provided by SWBT,
                           unless covered under a separate maintenance
                           agreement.

                  5.       If LSP issues a trouble report allowing SWBT access
                           to the end user's premises and SWBT personnel are
                           dispatched but denied access to the premises, then
                           Time and Material charges will apply for the period
                           of time that SWBT personnel are dispatched.
                           Subsequently, if SWBT personnel are allowed access to
                           the premises, the charges discussed herein will still
                           apply.

                  6.       Time and Material charges apply on a first and
                           additional basis for each half hour or fraction
                           thereof. If more than one technician is dispatched in
                           conjunction with the same trouble report, the total
                           time for all technicians dispatched will be
                           aggregated prior to the distribution of time between
                           the "First Half Hour or Fraction Thereof" and "Each
                           Additional Half Hour or Fraction Thereof" rate
                           categories. Basic Time is work related efforts of
                           SWBT performed during normally scheduled working
                           hours on a normally scheduled work day. Overtime is
                           work related efforts of SWBT performed on a normally
                           scheduled work day, but outside of normally scheduled
                           working hours. Premium Time is work related efforts
                           of SWBT performed other than on a normally scheduled
                           work day.

                  7.       If LSP requests or approves a SWBT technician to
                           perform services in excess of or not otherwise
                           contemplated by the nonrecurring charges herein, LSP
                           will pay for any additional work to perform such
                           services, including requests for installation or
                           conversion outside of normally scheduled working
                           hours.

         H.       Other Pricing Terms and Conditions for Unbundled Local 
                  Switching (ULS)

                  1.       When LSP purchases Unbundled Local Switching, SWBT
                           will provide LSP the vertical features that the
                           switch is equipped to provide, as part of the usage
                           charges associated with ULS. LSP 
<PAGE>   269

                                                                  APPENDIX UNE
                                                                 PAGE 15 OF 17

                           will pay non-recurring charges to activate such
                           features in association with a particular ULS Port
                           type. There are two levels of non-recurring charges.
                           The first will apply when the features are activated
                           at the same time the port is established. A different
                           non-recurring charge applies when the feature is
                           activated subsequent to initial installation of the
                           port.

                  2.       When the NXX of the telephone number provided to LSP
                           is one associated with an optional EAS arrangement,
                           LSP will pay a flat-rated monthly port additive for
                           the optional EAS toll package(s) inherent in the
                           telephone number.

                  3.       LSP will pay the Toll Free Database query rate for
                           each query received and processed by SWBT's database.
                           When applicable, the charge for the additional
                           features (Designated 10-Digit Translation, Call
                           Validation and Call Handling and Destination) are per
                           query and in addition to the Toll Free Database query
                           charge, and will also be paid by LSP.

                  4.       Use of SWBT's SS7 signaling network will be provided
                           for unbundled local switching as set forth in
                           Appendix SS7. LSP does not separately order SS7 under
                           this method. LSP will be charged for the use of the
                           SWBT SS7 network on a per call basis when the SS7
                           network is used in conjunction with unbundled local
                           switching.

                  5.       With Unbundled Local Switching, SWBT will make
                           available features that require resources outside the
                           switch, but LSP will pay additional charges (e.g.,
                           TCAP messages, SS7 Signaling, database queries, etc.)
                           for such features.

                  6.       Associated with Unbundled Local Switching, LSP will
                           pay a non-recurring and a monthly recurring charge
                           for the establishment of common block for a
                           particular end user served by LSP. LSP will also pay
                           a non-recurring charge for activation of features
                           associated with individual ports and for subsequent
                           changes to features associated with individual ports.
                           These non-recurring charges are separate from the
                           service charges for service order processing.

         I.       Temporary Rate Structure for Unbundled Local Switching (ULS)

                  1.       LSP will be charged a per minute rate for each local
                           call generated by an unbundled local ULS port, when
                           both the originating and terminating telephone number
                           are in the same 11 digit CLLI end office. When LSP
                           uses a ULS port to initiate a call to a terminating
                           number associated with a different 11 digit CLLI, LSP
                           will pay a rate per minute for ULS plus a rate per
                           minute for UCT 
<PAGE>   270

                                                                  APPENDIX UNE
                                                                 PAGE 16 OF 17

                           transport. The parties agree to assume that SWBT's
                           common transport network is used in this latter case.

         J.       Standard Interim Structure for ULS

                  1.       Intra Switch Calls - On calls originating and 
                           terminating in the same switch:

                           a)       LSP will pay ULS-O for a call originating
                                    from an ULS line or trunk port that
                                    terminates to a SWBT end user service line
                                    or any other unbundled line or trunk port
                                    which is connected to the same end office
                                    switch.

                           b)       LSP will pay ULS-O for a centrex-like ULS
                                    intercom call in which the LSP's user dials
                                    from one centrex-like station to another
                                    centrex-like station in the same common
                                    block defined system.

                           c)       SWBT will not bill ULS-T for calls
                                    originating from a bundled line port (a line
                                    port associated with the provision of resold
                                    local service by SWBT, or associated with
                                    local service to SWBT end user) and
                                    terminating to a ULS Port.

                           d)       SWBT will not bill ULS-T for Intraswitch
                                    calls originated by an unbundled ULS port
                                    even when the line to which the call is
                                    terminated is another ULS Port.

                  2.       Inter Switch Calls - On calls not originating and
                           terminating in the same switch:

                           a)       When a call originates from an ULS Port and
                                    is routed to SWBT's public network via a
                                    connection to UCT, ULS-O will apply. Charges
                                    for UCT as outlined below will also apply.

                           b)       When an InterLATA toll call is initiated
                                    from an ULS port it will be routed to the
                                    end user PIC choice. ULS-O usage charges
                                    will apply to LSP in such event.

                           c)       Until IntraLATA Dialing Parity, all
                                    intraLATA toll calls initiated by ULS Port
                                    will be routed to SWBT. The LSP will pay
                                    IntraLATA toll rates for such calls. No ULS
                                    usage charges will apply to LSP in such
                                    event.

                           d)       After IntraLATA Dialing Parity, IntraLATA
                                    toll calls from ULS Ports will be routed to
                                    the end user PIC choice. ULS-O charges will
                                    apply.

                           e)       When LSP uses ULS Ports to initiate an
                                    800/888 call, SWBT will perform the
                                    appropriate database query and 
<PAGE>   271
                                                                    APPENDIX UNE
                                                                   PAGE 17 OF 17

                                    route the call to the indicated IXC. No
                                    ULS-O charges will apply to the ULS Port.

                           f)       When a call that has been routed through
                                    SWBT's public network terminates to an ULS
                                    Port, from another of the same LSP's ports
                                    or another LSP's ULS Port, ULS-T charges
                                    will apply.

                           g)       When a call that has been routed through
                                    SWBT's public network terminates to an ULS
                                    Port, from the bundled local exchange
                                    service of SWBT, ULS-T charges will apply.

                           h)       When a call terminates to an ULS Port via
                                    terminating access services provided by SWBT
                                    (e.g., FGA, FGB, FGD, WATS etc.) SWBT will
                                    assess ULS-T charges.

                           i)       When a call which has been routed from
                                    another network terminates to an ULS line
                                    port, ULS-T charges will apply.


   
 
    
  
   




                                         

<PAGE>   272

                             UNE PRICE LIST - KANSAS

<TABLE>
<CAPTION>
                                                               MONTHLY/MOU RATES                        NONRECURRING CHARGE

                                                 ZONE A             ZONE B              ZONE C          INITIAL   ADDITIONAL
                                                 ------             ------              ------          -------   ----------
<S>                                           <C>                <C>                 <C>                 <C>          <C>    
Network Interface Device  (NID)

      Disconnect Loop from inside wiring,
         per NI                                     N/A                N/A                 N/A            $61.50       $30.75

Unbundled Loops

      2-Wire Analog                              $70.30             $26.55              $19.65            $60.55       $25.30
         Conditioning for dB Loss                 $7.05              $7.05               $7.05            $65.00       $24.75
      4-Wire Analog                             $140.60             $53.10              $39.30            $60.55       $25.30
      2-wire Digital                             $95.55             $48.20              $49.00           $157.20       $82.00
      4-wire Digital                            $223.85            $136.10             $145.30           $372.40      $147.10

Loop Cross Connects
      Analog Loop to Collocation
                      2-wire cross connect        $2.10              $2.10               $2.10            $72.50       $69.05
                      4-wire cross connect        $4.20              $4.20               $4.20            $85.85       $82.35
      Digital Loop to Collocation
                      2-wire cross connect        $2.10              $2.10               $2.10            $72.50       $69.05
                      4-wire cross connect       $11.30             $11.30              $11.30            $85.85       $82.35
      Analog Loop to 
        Multiplexer/Interoffice
                      2-wire cross connect        $5.15              $5.15               $5.15           $106.60       $98.00
                      4-wire cross connect        $6.90              $6.90               $6.90           $125.00      $116.45
      Digital Loop to
        Multiplexer/Interoffice
                      2-wire cross connect       $12.35             $12.35              $12.35           $106.60       $98.00
      Analog Loop to DCS/ Switch Port
                      2-wire cross connect           NC                 NC                  NC                NC           NC
                      4-wire cross connect           NC                 NC                  NC                NC           NC
      Digital Loop to DCS/Switch Port
                      2-wire cross connect           NC                 NC                  NC                NC           NC
                      4-wire cross connect           NC                 NC                  NC                NC           NC

Local Switching
Interim Structure
  Within the Same Central Office
    Per Originating or Terminating MOU        $0.006708          $0.006405           $0.006891               N/A          N/A
  Between Different Central Offices
    Per Originating or Terminating MOU        $0.015193          $0.014587           $0.015559               N/A          N/A
Long Term Structure
    Per Originating or Terminating MOU        $0.006708          $0.006405           $0.006891               N/A          N/A

Customized Routing                                  ICB                ICB                 ICB               ICB          ICB

Port Charge Per Month
      Analog Line Port                            $3.10              $3.10               $3.10            $82.60       $74.05
      Analog Trunk Side (DID)                    $26.30             $26.30              $26.30           $152.60          ---
      BRI Port                                    $7.00              $7.00               $7.00            $13.35        $7.30
      PRI Port                                  $208.75            $208.75             $208.75           $445.70      $204.55
      Feature Activation per Port Type              ICB                ICB                 ICB               ICB          ICB
      Centrex-like System Charges                   ICB                ICB                 ICB               ICB          ICB
      EAS Port Additive                          $24.40             $24.40              $24.40                NA           NA

Tandem Switching
      per Minute of Use                       $0.002335          $0.002335           $0.002335               ---          ---

Common Transport
      per Minute of Use                       $0.000609          $0.000609           $0.000609               ---          ---

Dedicated Transport
      Entrance Facility:
      DS1                                       $148.95            $148.95             $148.95           $628.00      $456.00
      DS3                                     $1,805.00          $1,805.00           $1,805.00           $637.00      $496.00

      Interoffice Transport:
        DS1           First Mile                 $69.00             $69.00              $69.00           $408.00      $314.00
                      Each Additional Mile       $17.70             $17.70              $17.70               N/A          N/A
        DS3           First Mile                $933.00            $933.00             $933.00           $473.00      $341.00
                      Each Additional Mile      $118.00            $118.00             $118.00               N/A          N/A

Dedicated Transport Cross Connects 
        Voice Grade 2-wire                           NC                 NC                  NC                NC           NC
</TABLE>



                                  Page 1 of 2
<PAGE>   273

                             UNE PRICE LIST - KANSAS

<TABLE>
<S>                                              <C>               <C>                 <C>                <C>             <C>    
      Voice Grade 4-wire                             NC                 NC                  NC                   NC            NC
      DS0 to DCS                                     NC                 NC                  NC                   NC            NC
      DS1                                            NC                 NC                  NC                   NC            NC
      DS3                                            NC                 NC                  NC                   NC            NC

Digital Cross-Connect System
      DCS Port Charge
      DSO                                         12.00             $12.00              $12.00               $20.00       N/A
      DS1                                        $45.14             $45.14              $45.14               $43.00       N/A
      DS3                                       $490.05            $490.05             $490.05               $32.00       N/A
      DCS Establishment Charge                      N/A                N/A                 N/A            $1,722.00       N/A
      Database Modification Charge                  N/A                N/A                 N/A               $80.00       N/A
      Reconfiguration Charge                        N/A                N/A                 N/A                $1.25       N/A

<CAPTION>
Service Order Charges - Unbundled Elements       Simple            Complex
<S>                                              <C>               <C>                 
      New Service                                $60.00            $245.00
      Charge                                     $58.00            $136.00
      Record                                     $36.00            $114.00
      Disconnect                                 $30.00             $66.00

<CAPTION>
Maintenance of Service Charges                   Initial        Additional
<S>                                              <C>               <C>
      Basic Time                                 $30.93             $21.32  per 1/2 hr. or fraction thereof
      Overtime                                   $36.35             $26.73  per 1/2 hr. or fraction thereof
      Premium Time                               $41.77             $32.15  per 1/2 hr. or fraction thereof

0
      Basic Time                                 $30.93             $21.32  per 1/2 hr. or fraction thereof
      Overtime                                   $36.35             $26.73  per 1/2 hr. or fraction thereof
      Premium Time                               $41.77             $32.15  per 1/2 hr. or fraction thereof
</TABLE>





                                  Page 2 of 2
<PAGE>   274
                                                               Appendix Wireless
                                                                     Page 2 of 6


                                APPENDIX WIRELESS


This Appendix sets forth the terms and conditions under which the Parties will
distribute revenue from their joint provision of Wireless Interconnection
Service for traffic originated on a Commercial Mobile Radio Service (CMRS)
Provider's network and terminating through the Parties' respective wireline
switching networks within a Local Access and Transport Area (LATA). The Parties
will be compensated under this Appendix only to the extent that they are not
been compensated for Wireless Interconnection Service under other tariffs,
settlement agreements, contracts or other mechanism. This Appendix is subject to
the terms and conditions of applicable tariffs.

1.0      DEFINITIONS

         1.1.     Wireless Interconnection Service - The interchange of traffic
                  originated from a Commercial Mobile Radio Service (CMRS)
                  Provider's Mobile Telephone Switching Office (MTSO) through
                  SWBT's or the LSP's point of switching for termination on the
                  relevant Party's wireline switching network.

         1.2.     Commercial Mobile Radio Service (CMRS) Provider - A radio
                  common carrier provider of domestic public cellular
                  telecommunication service, as defined in Part 22, Part 24, or
                  Part 90 of the FCC Rules and Regulations.

         1.3.     End Office - SWBT or LSP switching system where exchange
                  service customer station loops are terminated for the purpose
                  of interconnection to each other and to the network.

         1.4.     Local Access and Transport Area ("LATA") - A geographic area
                  marking the boundaries  beyond which a Bell Operating  Company
                  formerly could not carry telephone calls pursuant to the terms
                  of the Modification of Final Judgment (MFJ), U.S. vs. American
                  Tel. & Tel. Co., 552 F.Supp. 131 (D.D.C.  1983),  affirmed sub
                  nom. Maryland v. United States, 460 U.S. 1001 (1983).

         1.5.     Local Calling Area or Local Calling Scope - That area in which
                  the message telephone exchange service between two or more end
                  offices, without a toll charge, is provided.

         1.6.     Minutes of Use (MOU) - For the purposes of this Appendix, MOU
                  means the Terminating Traffic as recorded by the Primary
                  Company or MOU provided by the CMRS Provider to the Primary
                  Company where the Primary Company is unable to measure the
                  actual terminating usage.

         1.7.     Mobile Telephone Switching Office ("MTSO") - A CMRS Provider's
                  switching equipment or terminal used to provide CMRS
                  Provider's switching services or,
<PAGE>   275
                                                               Appendix Wireless
                                                                     Page 3 of 6


                  alternatively, any other point of termination designated by
                  the CMRS Provider. The MTSO directly connects the CMRS
                  Provider's customers within its licensed serving area to the
                  Primary Company's facilities.

         1.8.     Primary Company - The Party that provides the End Office or
                  Tandem Office where the CMRS Provider chooses to connect
                  terminating traffic. The Primary Company also bills the CMRS
                  Provider for Wireless Interconnection Service.

         1.9.     Revenues - Those monies the Primary Company bills and collects
                  from the CMRS Provider for jointly provided Wireless
                  Interconnection Service.

         1.10.    Secondary Company - The Party that receives Terminating 
                  Traffic from the Primary Company.

         1.11.    Tandem Office - A Party's switching system that provides an
                  intermediate switching point for traffic between end offices
                  or the network.

         1.12.    Terminating Traffic - That traffic which is delivered by a
                  CMRS Provider to the Primary Company for termination at a
                  point on the intraLATA wireline switching network.

2.0      ADMINISTRATION OF REVENUE DISTRIBUTION

         2.1.     The Primary Company will compute, bill, collect and distribute
                  the revenue for jointly provided Wireless Interconnection
                  Service for calls terminating within a LATA. On jointly
                  provided Wireless Interconnection Service, the Primary Company
                  will distribute a portion of the Local Transport (LT) Revenues
                  as described below with the Secondary Company for its part in
                  terminating traffic from the CMRS Provider. The Primary
                  Company will distribute applicable Local Switching (LS) and
                  Carrier Common Line (CCL) charges which are collected from the
                  CMRS Provider to the Secondary Company, as described below.

         2.2.     Distribution of revenues will be computed using the rate
                  elements as defined in SWBT's applicable Wireless
                  Interconnection Tariff.

         2.3.     For terminating traffic, actual monthly wireless MOU will be
                  measured by the Primary Company for each office in the LATA or
                  provided to the Primary Company by the CMRS Provider in those
                  cases where the Primary Company is unable to measure the
                  actual terminating usage.

         2.4.     Each month, the amount of CCL and LS revenue (based on the
                  rates in the Primary Company's applicable tariffs) due the
                  Secondary Company from the Primary Company will be determined
                  by totaling the actual terminating MOU associated with each of
                  the Secondary Company's end offices and multiplying



<PAGE>   276
                                                               Appendix Wireless
                                                                     Page 4 of 6

                  those MOU by the appropriate rates as set out above. The LT
                  revenues due to the Secondary Company will be determined for
                  each Secondary Company end office by multiplying the billed
                  MOU by the appropriate LT rate multiplied by the applicable
                  end office percentage ownership of facilities listed in
                  Exhibit A to this Appendix.

         2.5.     The Primary Company will prepare a revenue and usage statement
                  on a monthly basis. Within 90 calendar days after the end of
                  each billing period, except in cases of disputes, the Primary
                  Company will remit the compensation amount due the Secondary
                  Company. When more than one compensation amount is due, they
                  may be combined into a single payment. No distribution will be
                  made for the revenue the Primary Company is unable to collect.

         2.6.     The revenue and usage statement will contain the following
                  information:

                  2.6.1.   The number of MOU for each of the Secondary Company's
                           end offices, the corresponding rate elements to be
                           applied to the MOUs for each end office, and the
                           resulting revenues;

                  2.6.2.   The total of the MOU and revenues for the Secondary 
                           Company;

                  2.6.3.   The percent ownership factor used to calculate the 
                           distribution of Local Transport revenues; and,

                  2.6.4.   Adjustments for uncollectibles.

         2.7.     The Parties agree that revenue distribution under this
                  Appendix will apply as of the effective date of the Agreement.
                  The Primary Company will start revenue distribution on usage
                  within 60 calendar days from the date this Appendix is
                  effective.

3.0      TERMINATION PROVISIONS

         3.1.     This Appendix shall remain in effect until terminated by
                  either Party upon a minimum of 30 calendar days written notice
                  by such Party to the designated representative of the other.

         3.2.     This Appendix may be terminated by an order of an appropriate
                  regulatory commission or a court of competent jurisdiction.

4.0      MISCELLANEOUS PROVISIONS

         4.1.     Exhibit A to this Appendix is attached and incorporated into
                  this Appendix by reference. From time to time, by written
                  agreement of both parties, new Exhibits



<PAGE>   277
                                                               Appendix Wireless
                                                                     Page 5 of 6

 
                  may be substituted for the attached Exhibit A, superseding and
                  canceling the Exhibit A previously in effect.

         4.2.     Each party will promptly upon request, furnish to the other
                  such information as may reasonably be required to perform
                  under this Appendix.

5.0      NOTICE

         5.1.     In the event any notices are required under the terms of this
                  Appendix, they shall be sent by registered mail, return
                  receipt requested to:

                           if to SWBT                Jeff Fields

                           if to LSP                 Richard Weinstein

<PAGE>   278
                                                               Appendix Wireless
                                                                     Page 6 of 6



                         EXHIBIT A TO APPENDIX WIRELESS

           END OFFICE PERCENT OWNERSHIP OF LOCAL TRANSPORT FACILITIES


CLLI CODE
FACILITIES                       NPA-NXX                % OWNERSHIP OF TRANSPORT





<PAGE>   279
                                                                     APPENDIX WP
                                                                     PAGE 2 OF 6


                                   APPENDIX WP

                         WHITE PAGES DIRECTORY APPENDIX

SWBT and LSP agree to the following terms and conditions for the printing and
distribution of White Pages directories:

1.       SWBT publishes White Pages directories for geographic areas in which
         LSP also provides local exchange telephone service, and LSP wishes to
         include listings information for its end users in the appropriate SWBT
         White Pages directories.

2.       LSP also desires distribution to its end users of the White Pages
         directories that include listings of LSP's end users.

3.       NOW THEREFORE, in consideration of these premises, SWBT and LSP agree 
         as follows:

I.       SERVICE PROVIDED

         A.       Subject to SWBT's practices, as well as the rules and
                  regulations applicable to the provision of White Pages
                  directories, SWBT will include in appropriate White Pages
                  directories the primary alphabetical listings of all LSP end
                  users located within the local directory scope. The rules,
                  regulations and SWBT practices are subject to change from time
                  to time.

         B.       Prior to the issuance of a particular directory and at such
                  time or times as may be mutually agreed, the LSP shall furnish
                  to SWBT, in a form acceptable to both Parties, subscriber
                  listing information pertaining to LSP end users located within
                  the local directory scope, along with such additional
                  information as SWBT may require to prepare and print the
                  alphabetical listings of said directory.

         C.       LSP may provide LSP's subscriber listing information to SWBT
                  for inclusion in the White Pages directory via either a
                  mechanical or manual feed of the listing information to SWBT's
                  listing database or the LSP may choose to provide listings in
                  the form of camera ready copy.

         D.       If LSP provides its subscriber listing information to SWBT via
                  a mechanical or manual feed such listings are to be
                  alphabetically interfiled (interspersed) in the SWBT directory
                  among SWBT subscriber listings. If LSP provides its subscriber
                  listing information to SWBT in the form of camera ready copy,
                  SWBT will include such listings as a separate section of the
                  White Pages directory included in a separate section of the
                  SWBT White Pages directory.



<PAGE>   280
                                                                     APPENDIX WP
                                                                     PAGE 3 OF 6


         E.       Sixty (60) days prior to the business office close date for a
                  particular directory, SWBT shall provide LSP a verification
                  list of its subscriber listings, as such listings are to
                  appear in the directory. The verification list shall also
                  include Directory Delivery Address information for each LSP
                  end user. LSP shall review this verification list and shall
                  submit to SWBT any necessary additions, deletions or
                  modifications within thirty (30) days of receipt of the list
                  from SWBT.

         F.       If LSP provides its subscriber listing information to SWBT in
                  the form of camera ready copy. SWBT shall provide LSP sixty
                  (60) days written notice of the date by which LSP must provide
                  this information to SWBT.

         G.       Sixty (60) days prior to the directory close, LSP shall
                  provide to SWBT written specification of the total number of
                  directories that it will require, along with the number of
                  directory(ies) that each LSP end user will require. SWBT will
                  provide one ( 1) copy of the directory to LSP end users,
                  unless otherwise instructed by the LSP.

         H.       At LSP's request, SWBT will include LSP specific information
                  (i.e., business office, residence office, repair bureau, etc.)
                  in the White Pages directory on an "index-type" informational
                  page. This page will also include specific information
                  pertaining to other LSPs. At its option, LSP shall provide
                  SWBT with its logo and information in the form of a camera
                  ready copy, sized at 1/8th of a page.

         I.       At its request, LSP may purchase "Informational Page(s)" in
                  the informational section of the White Pages directory
                  covering a geographic area. Such page(s) shall be no different
                  in style, size, color and format than SWBT "Informational
                  Pages". Sixty (60) days prior to the directory close date, the
                  LSP shall provide to SWBT the "Informational Page" in the form
                  of camera- ready copy.

II.      USE OF SUBSCRIBER LISTING INFORMATION

         A.       LSP authorizes SWBT to use the subscriber listing information
                  provided to SWBT pursuant to this Appendix for the sole
                  purpose of including the listings in the appropriate printed
                  White Pages directory and directory assistance databases where
                  such service is provided by SWBT.

         B.       At LSP's request, SWBT shall transmit LSP's end user listing
                  information to designated third party directory publishers
                  (limited to publishers that SWBT transmits its own listing
                  information) for a one-time administrative fee of $100.00 per
                  occurrence, per directory publisher.



<PAGE>   281
                                                                     APPENDIX WP
                                                                     PAGE 4 OF 6


III.     PRICING

         A.       The rates for the services described herein are identified on
                  Exhibit I. If LSP provides its subscriber listing information
                  to SWBT via a mechanical or manual feed of the listings to
                  SWBT's listings database, SWBT will assess per book copy, per
                  subscriber line, charge when directories are delivered to LSP
                  end user premises, or an annual, per book copy charge when
                  delivered in bulk to LSP. Included in this rate, LSP will
                  receive for its end user, one single listing in SWBT's White
                  Page directory, and one copy of the directory delivered to
                  either its end user's premises, or in bulk to the LSP
                  location.

         B.       Where an LSP end user requires additional listings to appear
                  in the White Pages directory, SWBT will assess LSP an annual
                  charge for such listings at existing SWBT tariff rates.

         C.       For any "Subsequent" directory orders (orders placed after the
                  initial order/forecast is provided - see I. G. above), SWBT
                  shall charge LSP a per book copy charge. This rate applies,
                  per book copy, when such directories are delivered in bulk to
                  LSP or to the LSP's end user premises.

         D.       For inclusion of the LSP "Informational Page" in the White
                  Pages directory, SWBT shall charge the LSP an annual fee for
                  inclusion in the Metropolitan area book.

IV.      ASSIGNMENT

         The subscriber listing information shall remain the property of LSP.
         Except as stated in Section II herein, SWBT shall not sublicense,
         assign, sell or transfer the subscriber listing information provided
         hereunder, nor shall SWBT authorize any other company or any person to
         use the subscriber listing information for any other purpose. SWBT
         shall take appropriate measures to guard against any unauthorized use
         of the listings provided to it hereunder (at least the same measures
         SWBT takes to protect its own listings from unauthorized use), whether
         by SWBT, its agents, employees or others.

V.       LIABILITY

         A.       LSP hereby releases SWBT from any and all liability for
                  damages due to errors or omissions in LSP's subscriber listing
                  information as provided to SWBT under this Appendix, and/or
                  LSP's subscriber listing information as it appears in the
                  White Pages directory, including, but not limited to, special,
                  indirect, consequential, punitive or incidental damages.

         B.       LSP shall indemnify, protect, save harmless and defend SWBT
                  (or SWBT's officers, employees, agents, assigns and
                  representatives) from and against any and all losses,
                  liability, damages and expense arising out of any demand,
                  claim, suit or



<PAGE>   282
                                                                     APPENDIX WP
                                                                     PAGE 5 OF 6


                  judgment by a third party in any way related to any error or
                  omission in LSP's subscriber listing information as it appears
                  in the White Pages directory, including any error or omission
                  related to non-published or non-listed subscriber listing
                  information. LSP shall so indemnify regardless of whether the
                  demand, claim or suit by the third party is brought jointly
                  against LSP and SWBT, and/or against SWBT alone. However, if
                  such demand, claim or suit specifically alleges that an error
                  or omission appears in LSP's subscriber listing information in
                  the White Pages directory, SWBT may, at its option, assume and
                  undertake its own defense, or assist in the defense of the
                  LSP, in which event the LSP shall reimburse SWBT for
                  reasonable attorney's fees and other expenses incurred by SWBT
                  in handling and defending such demand, claim and/or suit.

         C.       This Appendix shall not establish, be interpreted as
                  establishing, or be used by either party to establish or to
                  represent their relationship as any form of agency,
                  partnership or joint venture. Neither Party shall have any
                  authority to bind the other or to act as an agent for the
                  other unless written authority, separate from this Appendix,
                  is provided. Nothing in the Appendix shall be construed as
                  providing for the sharing of profits or losses arising out of
                  the efforts of either or both of the Parties. Nothing herein
                  shall be construed as making either Party responsible or
                  liable for the obligations and undertakings of the other
                  Party.

VI.      BREACH OF CONTRACT

         If either Party is found to have materially breached this Appendix, the
         non-breaching Party may terminate the Appendix by providing written
         notice to the breaching party, whereupon this Appendix shall be null
         and void with respect to any issue of SWBT's White Pages directory
         published sixty (60) or more days after the date of receipt of such
         written notice.

VIII.    TERM

         A.       This Appendix shall continue in force for one (1) until
                  terminated by sixty (60) days prior written notice by either
                  Party to the other. Upon termination, SWBT shall cease using,
                  for any purpose whatsoever, the subscriber listing information
                  provided hereunder by LSP, and shall promptly return such
                  subscriber listing information to the LSP.

         B.       Upon termination of the interconnection Agreement, this
                  Appendix will be null and void with respect to any issue of
                  directories published thereafter, except that the
                  indemnification provided by Section V herein shall continue
                  with respect to any directory published within sixty (60) days
                  of termination.

<PAGE>   283
                                                                     APPENDIX WP
                                                                     PAGE 6 OF 6




                                   APPENDIX WP
                                    EXHIBIT I
                                   PRICE LIST


<TABLE>
<CAPTION>
                            PRICE PER BOOK
                                 COPY              PRICE PER BOOK         PRICE PER SINGLE        PRICE PER BOOK
                             DELIVERED IN               COPY                   SIDED               COPY(1) ORDERED
                                 BULK               DELIVERED TO           INFORMATIONAL           AFTER INITIAL
       DIRECTORY                TO LSP              LSP END USER                PAGE                   ORDER
- ----------------------------------------------------------------------------------------------------------------
<S>                             <C>                     <C>                  <C>                      <C>    
Kansas City                      $3.24                  $3.72                $1,905.11                $10.00
Lawrence                         $3.24                  $3.72                $1,905.11                $10.00
Topeka                           $3.24                  $3.72                $1,905.11                $10.00
Wichita                          $3.24                  $3.72                $1,905.11                $10.00
</TABLE>

(1) Subject to Availability


<PAGE>   284

                                                                     APPENDIX TP
                                                                     Page 2 of 2



                         ELECTRICAL/OPTICAL INTERFACES:

         -        SWBT Technical Publication TP-76839 - SONET Transmission
                  Requirements - Performance and Interface Specifications, Issue
                  1, January 1996, or the most current version.

         -        SWBT Technical Publication TP-76625 - High Capacity Digital
                  Service (1.544 Mbs and 44.736 Mbs Requirements and
                  Transmission Limits, Issue 1, June 1990, or the most current
                  version.

         INTERCONNECTION RESPONSIBILITIES RELATED TO SIGNALING:
         -        SWBT Technical Publication, TP-76638 - Common Channel 
                  Signaling Network Interface Specifications

         -        GR-000246-CORE, Bell Communications Research Specifications 
                  of Signaling System 7

         -        GR-000317-CORE, Switching System Requirements for Call 
                  Control Using the Integrated Services Digital Network User 
                  Part

         -        GR-000394-CORE, Switching System Requirements for 
                  Interexchange Carrier Interconnection Using the Integrated 
                  Services Digital Network User Part

         -        GR-000606-CORE, LATA Switching Systems Generic Requirements-
                  Common Channel Signaling-Section 6.5

         -        GR-000905-CORE, Common Channel Signaling Network Interface 
                  Specification Supporting Network Interconnection Message 
                  Transfer Part (MTP) and Integrated Digital Services Network 
                  User Part (ISDNUP)

         COLLOCATION
         -        SWBT's Technical Publication for Physical Collocation (sixth 
                  revision dated 2-18-97)

         TECHNICAL EXHIBIT SETTLEMENT PROCEDURES
         -        TESP

<PAGE>   285
                                                                   APPENDIX PORT
                                                                     PAGE 2 OF 5


                                  APPENDIX PORT


I.       GENERAL

         SWBT and LSP will provide Interim Number Portability (INP) in
         accordance with requirements of the Act. INP will be provided by each
         Party to the other upon request. INP will be provided with minimum
         impairment of functionality, quality, reliability and convenience to
         subscribers of LSP or SWBT. The Parties will provide Permanent Number
         Portability (PNP) as soon as it is technically feasible, in conformance
         with FCC rules and the Act, and will participate in development of PNP
         in the state, in accordance with the FCC's First Report and Order in
         Docket No. 95-116 (hereinafter called the Number Portability Order). As
         described herein, INP is a service arrangement whereby an end user, who
         switches subscription of local exchange service from one provider to
         another is permitted to retain, for its use, the existing assigned
         number provided that the end user remains in the same serving wire
         center.

II.      TERMS, CONDITIONS UNDER WHICH SWBT SHALL PROVIDE INP

         A.       SERVICE PROVIDED

                  1.       SWBT shall only provide INP, as described herein, to 
                           LSPs.

                  2.       SWBT shall only provide INP services and facilities
                           where technically feasible, subject to the
                           availability of facilities, and only from properly
                           equipped central offices. SWBT does not offer INP
                           services and facilities for NXX codes 555, 976, 950,
                           or SWBT operated coin telephone service.

                  3.       LSP shall not order INP services for local exchange
                           end user accounts of SWBT where the end user=s
                           payments are 45-days or more in arrears unless full
                           payment is made or an agreement is reached where the
                           LSP agrees to make full payment on the end user=s
                           behalf.

                  4.       When the exchange service offerings associated with
                           INP service are provisioned using remote switching
                           arrangements, SWBT shall only make INP service
                           available from, or to host central offices.

         B.       OBLIGATIONS OF SWBT

                  1.       SWBT's sole responsibility is to comply with the
                           service requests it receives from the LSP and to
                           provide INP in accordance with this Appendix.



<PAGE>   286
                                                                   APPENDIX PORT
                                                                     PAGE 3 OF 5


         C.       OBLIGATIONS OF LSPS

                  1.       LSP shall coordinate the provision of service with
                           SWBT to assure that LSP's switch is capable of
                           accepting INP ported traffic.

                  2.       LSP is solely responsible to provide equipment and 
                           facilities that are compatible with SWBT's service
                           parameters, interfaces, equipment and facilities. LSP
                           shall provide sufficient terminating facilities and
                           services at the terminating end of an INP call to
                           adequately handle all traffic to that location and
                           shall ensure that its facilities, equipment and
                           services do not interfere with or impair any
                           facility, equipment or service of SWBT or any of its
                           end users. In the event that SWBT determines in its
                           sole judgment that the LSP will likely impair or is
                           impairing, or interfering with any equipment,
                           facility or service of SWBT or any of its end users,
                           SWBT may either refuse to provide INP service or
                           terminate it in accordance with other provisions of
                           this STC or SWBT's tariffs.

                  3.       LSP shall provide an appropriate intercept
                           announcement service for any telephone numbers
                           subscribed to INP service for which LSP is not
                           presently providing local exchange service or
                           terminating to an end user.

                  4.       Where LSP chooses to disconnect or terminate any INP
                           service, LSP shall designate which standard SWBT
                           intercept announcement SWBT shall provide for
                           disconnected number.

                  5.       LSP shall designate to SWBT at the time of its
                           initial service request for INP service one of the
                           following options for handling and processing of
                           Calling Card, Collect, Third Party, and other
                           operator handled non-sent paid calls from or to LSP
                           assigned telephone numbers:

                           a.       LSP may elect to block the completion of
                                    third number and calling card calls through
                                    the use of LIDB to select ported numbers.

                           b.       For non-sent paid calls billed to INP
                                    assigned numbers, a separate
                                    sub-clearinghouse billing arrangement must
                                    be established which will provide for the
                                    transmission of the EMR 01-01-01 billing
                                    records, and settlement of toll revenues.

         D.       LIMITATIONS OF SERVICE

                  1.       SWBT is not responsible for adverse effects on any
                           service, facility or equipment from the use of INP
                           service.

                  2.       End-to-end transmission characteristics may vary
                           depending on the distance and routing necessary to
                           complete calls over INP facilities and



<PAGE>   287
                                                                   APPENDIX PORT
                                                                     PAGE 4 OF 5


                           the fact that another carrier is involved in the
                           provisioning of service. Therefore, end-to-end
                           transmission characteristics cannot be specified by
                           SWBT for such calls.

         E.       SERVICE DESCRIPTIONS

                  1.       INP-REMOTE. INP-Remote is a service whereby a call
                           dialed to an INP-Remote equipped telephone number,
                           assigned to SWBT, is automatically forwarded to an
                           LSP-assigned, 7 or 10 digit local telephone number.
                           The forwarded-to-number is specified by the LSP at
                           the same location.

                           a.       INP-Remote provides an initial call path and
                                    two additional paths for the forwarding of
                                    no more than three (3) simultaneous calls to
                                    the LSP's specified forwarded-to number.
                                    Additional call paths are available on a per
                                    path basis.

                           b.       The LSP-assigned forwarded-to number shall
                                    be treated as two separate calls with
                                    respect to interconnection compensation, end
                                    user toll billing and intercompany
                                    settlement and access billing, i.e., an
                                    incoming call to the SWBT ported number
                                    shall be handled like any other SWBT call
                                    being terminated to that end office and the
                                    ported call to the LSP assigned telephone
                                    number in the LSP switch shall be handled as
                                    any local calls between SWBT and the LSP.

                           c.       Where facilities exist, SWBT will provide
                                    identification of the originating telephone
                                    number, via SS7 signaling, to the LSP.

                  2.       INP-DIRECT. INP-Direct is a service which provides
                           for the delivery of the called (dialed) number to the
                           LSP's switching (central office or premises)
                           equipment for identification and subsequent routing
                           and call completion.

                           a.       INP-Direct is available either on a per
                                    voice grade channel basis or a per DS1 (24
                                    equivalent voice grade channels) basis.

                                    (1)     Where the location of the LSP's
                                            switching equipment to which SWBT is
                                            providing voice grade or DS1
                                            INP-Direct service reside outside
                                            the exchange or central office
                                            serving area from which the
                                            INP-Direct service is purchased, LSP
                                            shall pay applicable interoffice
                                            mileage charges as specified in the
                                            applicable state Special Access
                                            Tariff.



<PAGE>   288
                                                                   APPENDIX PORT
                                                                     PAGE 5 OF 5


                           b.       INP-Direct service must be established with
                                    a minimum configuration of two (2) voice
                                    grade channels and one unassigned telephone
                                    number per SWBT switch. Transport facilities
                                    arranged for INP-Direct may not be mixed
                                    with any other type of trunk group. Outgoing
                                    calls may not be placed over facilities
                                    arranged for INP-Direct service.

                           c.       SS7 Signaling is not available on the 
                                    INP-Direct facilities.

         F.       PRICING

                  1.       The Parties will comply with all effective FCC, 
                           Commission and/or court Orders governing INP cost
                           recovery and compensation. The Parties acknowledge
                           that the Telephone Number Portability Order is
                           subject to pending Petitions for Reconsideration and
                           may be subject to appeal. As such, the Number
                           Portability Order may be reconsidered, revised and
                           remanded, or vacated, subject to further proceedings
                           before the FCC. As such, until a final decision is
                           rendered on INP cost recovery, the Parties agree to
                           track the costs associated with the implementation
                           and provision of INP and to "true-up" INP-related
                           accruals to reflect the final terms of any such
                           order.

                  2.       Neither Party waives its rights to advocate its views
                           on INP cost recovery, or to present before any
                           appropriate regulatory agency or court its views on
                           FCC or Commission actions pertaining to INP cost
                           recovery.



<PAGE>   289
                                                      Agreement No. ____________

                           MASTER AGREEMENT FOR ACCESS
              TO POLES, DUCTS, CONDUITS, AND RIGHTS-OF-WAY (KANSAS)

         This Agreement dated ______________, 19__, is made by and between 
Southwestern Bell Telephone Company ("SWBT") and the undersigned Applicant. As 
provided in this Agreement, SWBT will provide Applicant nondiscriminatory 
access, in accordance with the Pole Attachment Act, the Telecommunications Act 
of 1996, and applicable rules, regulations, and commission orders, to poles, 
ducts, conduits, and rights-of-way owned or controlled by SWBT and located in 
this state.

                               ARTICLE 1: PARTIES

         1.01 Southwestern Bell Telephone Company. Southwestern Bell Telephone
Company is a corporation chartered in the State of Missouri. SWBT's principal
office is located at 1010 Pine Street, St. Louis, Missouri 63101.

         1.02 Applicant. Applicant is a telecommunications carrier or cable
television system doing business or operating in this State under the following
name(s):

_______________________________________________________________________________
______________________________________________________________________________.

Applicant maintains offices in this State at the following address:

___________________
______________________________________________________________________________.

Applicant is more fully described in APPENDIX II ("Identification of
Applicant").

                         ARTICLE 2: PURPOSE OF AGREEMENT

         2.01 Primary Purpose of Agreement. The primary purpose of this
Agreement is to set forth the rates, terms, conditions, and procedures under
which SWBT will provide Applicant access to SWBT's poles, ducts, conduits, and
rights-of-way located in this State.

         2.02 Applicability. This Agreement applies to all poles, ducts,
conduits, and rights-of-way subject to the Pole Attachment Act, 47 U.S.C. 
Section 224, as amended by the Telecommunications Act of 1996, and further 
amendments.

         2.03 Construction in Accordance with Purpose. All provisions of this
Agreement shall be construed and applied consistently with the requirements of
the Pole Attachment Act and those provisions of the Telecommunications Act of
1996, including but not limited to 47 U.S.C. Sections 251(b)(4) and 271
(c)(2)(B)(iii), which mandate access to SWBT's poles, ducts, conduits, and
rights-of-way.

                                     PAGE 1
<PAGE>   290

         2.04 Uniform Application and Nondiscriminatory Access. In Paragraph
1156 of the First Interconnection Order in CC Docket No. 96-98, the FCC has
ordered that "[W]here access is mandated, the rates, terms, and conditions of
access must be uniformly applied to all telecommunications carriers and cable
operators that have or seek access." In Paragraph 1157 of the First
Interconnection Order, the FCC has further stated that except as specifically
noted elsewhere in that order, "a utility may not favor itself over other
parties with respect to the provision of telecommunications or video programming
services." This Agreement has been drafted and shall be construed to effectuate
these nondiscriminatory access requirements.

         2.05 Effect on Rights and Remedies under Law. This Agreement is
intended by the parties to implement, rather than abridge, their respective
rights under federal and state law. In the event of an irreconcilable conflict
between any provision of this Agreement and any applicable federal or state
laws, rules, regulations, or commission orders, the parties' rights and remedies
under such laws, rules, regulations, and orders shall take precedence over the
terms of this Agreement.

         2.06 Additional Negotiations. This Agreement is one of many agreements
between SWBT and parties seeking access to SWBT's poles, ducts, conduits, and
rights-of-way in this State. Nothing contained in this Agreement shall preclude
SWBT from negotiating additional or different terms of access with third
parties. Applicant may, at any time, seek amendments to this Agreement to
conform to the terms of agreements between SWBT and third parties. In addition,
the parties acknowledge that it may be necessary to amend or supersede this
Agreement to conform to changes in the law, streamline procedures for granting
access, address issues not addressed in this Agreement, and resolve operational
concerns arising by virtue of the presence of competing providers of
telecommunications and cable television services on, within, or in the vicinity
of SWBT's poles, ducts, conduits, and rights-of-way. Each party shall,
therefore, at the request of the other party, engage in good faith negotiations
to supplement, amend or replace this Agreement.

         2.07 Relationship to Interconnection Agreement. SWBT has provided
Applicant the option of executing this Agreement either as a standalone
agreement or as part of the interconnection agreement, if any, between the
parties. Applicant's election is reflected in this section, and this Agreement
shall be construed in accordance with Applicant's election. If this Agreement
has been executed as part of an interconnection agreement, Applicant shall have
the additional option of replacing this Agreement at any time with SWBT's
then-current Master Agreement for Access to Poles, Ducts, Conduits, and
Rights-of-Way.

              [ ]     This Agreement has been entered into as a standalone 
                      Agreement.

              [ ]     This Agreement has been entered into, at Applicant's 
                      request, as an appendix, attachment, or exhibit to an 
                      interconnection agreement


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<PAGE>   291


                      between the parties. Except as otherwise specifically
                      stated in this Agreement, the terms of this Agreement,
                      which are specific to poles, ducts, conduits, and
                      rights-of-way, shall apply in the event of conflict
                      between the terms of this Agreement and the general terms
                      and conditions set forth in the interconnection
                      agreement.

         2.08 Access Ancillary to Arrangements for Interconnection, Collocation,
and Access to Unbundled Network Elements. Nothing contained in this Agreement
shall be construed as precluding Applicant from having such additional access to
SWBT's poles, ducts, conduits, and rights-of-way as may be necessary to
effectuate the terms of other arrangements between Applicant and SWBT relating
to interconnection, collocation, and access to unbundled network elements. To
the extent that this Agreement does not provide the access required, additional
terms of access may be included in any tariff or agreement between the parties
establishing arrangements for interconnection, collocation, or access to
unbundled network elements.

                             ARTICLE 3: DEFINITIONS

         3.01 Definitions in general. As used in this Agreement, the terms
defined in this article shall have the meanings set forth below in Sections 3.02
to 3.48 except as the context otherwise requires.

         3.02 Agreement. The term "Agreement" refers to this Master Agreement
for Access to Poles, Ducts, Conduits, and Rights-of-Way. The term "Agreement"
includes all appendices, attachments, and addenda to this Agreement, including
but not limited to addenda, if any, reflecting state-specific requirements or
Applicant-specific requirements imposed by interconnection arbitration orders.

         3.03 Anchor. The term "anchor" refers to a device, structure, or
assembly which stabilizes a pole and holds it in place. An anchor assembly may
consist of a rod and fixed object or plate, typically embedded in the ground,
which is attached to a guy strand or guy wire which, in turn, is attached to the
pole. The term "anchor" does not include the guy strand which connects the
anchor to the pole.

         3.04 Appendix. The capitalized term "APPENDIX" refers to one of the
following appendices to this Agreement.

                APPENDIX I:     Schedule of Rates, Fees, and Charges

               APPENDIX II:     Identification of Applicant

              APPENDIX III:     Administrative Forms and Notices

                   SW-9433:     Pole Attachments


                                     PAGE 3
<PAGE>   292


                   SW-9434:     Access Application and Make-Ready Authorization

                   SW-9435:     Conduit Occupancy

                  SW-9436A:     Notification of Surrender or Modification of 
                                Pole Attachment License by Licensee

                  SW-9436B:     Notification of Surrender or Modification of 
                                Conduit Occupancy License by Applicant

                  SW-9436C:     Notification of Unauthorized Attachments by 
                                Applicant

               APPENDIX IV:     Insurance Requirements

                APPENDIX V:     Nondisclosure Agreement

               APPENDIX VI:     Notices to Applicant

              APPENDIX VII:     Notices to SWBT

             APPENDIX VIII:     Identification of Utility Liaison Supervisor 
                                (ULS)

         3.05 Assigned. When used with respect to pole, duct, conduit, or
right-of-way space, the term "assigned" refers to space that is occupied by, or
has been designated for occupancy by, either party or by a third party. Except
as otherwise specifically provided in this Agreement, no person or entity shall
have the right to occupy space assigned to another person or entity (other than
on a temporary basis in the event of emergency as provided in Section 15.02 of
this Agreement) until the assignment has been released or lapsed.
Assignment procedures are described in Section 8.02 of this Agreement.

         3.06 Authorized contractor. "Authorized contractors" are contractors
selected by Applicant who may, subject to Applicant's direction and control,
perform facilities modification or make-ready work which would ordinarily be
performed by SWBT or persons acting on SWBT's behalf. As used in this Agreement,
the term "authorized contractor" does not refer to contractors performing
routine installation, maintenance, or repair work on Applicant's behalf or other
contractors who may be selected by Applicant to perform work on Applicant's
behalf without SWBT's approval. More specifically, the term "authorized
contractor" refers only to those contractors included on a list of contractors
mutually approved by Applicant and SWBT to perform one or more of the following
tasks within a specified SWBT construction district: (a) installation of those
sections of Applicant's ducts or facilities which connect to SWBT's conduit
system as provided in Section 6.08(c); (b) installation of inner duct as
provided in Section 10.02(b); (c) excavation work in connection with the removal
of retired or inactive (dead) cables as provided in Section 10.02(c); or (d)
make-ready work as provided in Sections 10.04 and 10.05. A person or entity
approved as an authorized contractor is only an authorized


                                     PAGE 4
<PAGE>   293


contractor with respect to those tasks for which such person or entity has been
approved by both parties and is an authorized contractor only in those SWBT
construction districts agreed to by both parties. Designation of an authorized
contractor for a specific category of tasks shall not be deemed to be the
designation of such person or entity as an authorized contractor for other
purposes, nor shall approval of an authorized contractor by one SWBT
construction district constitute approval of such authorized contractor for the
area served by a different SWBT construction district; provided, however, that
if a specific construction job extends beyond the boundaries of a single
construction district, an authorized contractor shall, for the purposes of that
job, be deemed to have been approved by all SWBT construction districts in which
the work is to be performed. If, by agreement of the parties or commission
order, Applicant has been approved as an authorized contractor, such approval
shall be noted by an addendum to this Agreement.

         3.07 Available. When used with respect to pole, duct, conduit, and
right-of-way space, the term "available" refers to space that is not occupied or
assigned. In conduit systems owned or controlled by SWBT, maintenance ducts will
not be considered "available" for assignment. All other unassigned ducts, inner
ducts, sub-ducts, and partitioned conduits in a conduit system owned or
controlled by SWBT will be deemed available for assignment.

         3.08 Cables. The term "cable" includes but is not limited to
twisted-pair copper, coaxial, and fiber optic cables. Cables are transmissions
media which may be attached to our placed in poles, ducts, conduits, and
rights-of-way but are not themselves poles, ducts, conduits, or rights-of-way.
Nothing contained in this Agreement shall be construed as a grant of access to
cables attached to SWBT's poles or placed in SWBT's ducts, conduits, or
rights-of-way.

         3.09 Conduit. The term "conduit" refers to all SWBT conduits subject to
the Pole Attachment Act. In general, conduits are tubes or structures, usually
underground or on bridges, containing one or more ducts used to enclose cables,
wires, and associated transmission equipment. Except as the context otherwise
requires, the term "conduit" refers only to conduit owned or controlled by SWBT,
including the re-enterable manholes and handholes used to connect ducts and
provide access to cables, wires, and other facilities within the ducts. As used
in this Agreement, the term "conduit" refers only to conduit structures
(including ducts, manholes and handholes) and space within those structures and
does not include (a) cables and other telecommunications equipment located
within conduit structures or (b) central office vaults, controlled environment
vaults, or other SWBT structures (such as huts and cabinets) which branch off
from or are connected to SWBT's conduit.

         3.10 Conduit occupancy. The term "conduit occupancy" refers to the
presence of wire, cable, optical conductors, or other equipment within any part
of SWBT's conduit system.


                                     PAGE 5
<PAGE>   294


         3.11 Conduit system. The term "conduit system" refers to any
combination of ducts, conduits, manholes, and handholes joined to form an
integrated whole. As used in this Agreement, the term "conduit system" refers
only to conduit systems owned or controlled by SWBT and does not include (a)
cables and other telecommunications equipment located within conduit structures
or (b) central office vaults, controlled environment vaults, or other SWBT
structures (such as huts and cabinets) which branch off from or are connected to
SWBT's conduit.

         3.12 Construction District. The term "construction district" refers to
the SWBT organization responsible for outside plant construction in a specified
geographic area. The term "construction district" connotes responsibility for
handling a function and not to the official name of the organization responsible
for outside plant construction matters.

         3.13 Cost/Cost-based. The terms "cost" and "costs" refer to costs
determined in a manner consistent with the Pole Attachment Act and applicable
rules, regulations, and commission orders. The term "cost-based" refers to
rates, fees, and other charges which are based on costs and determined in a
manner consistent with the Pole Attachment Act and applicable rules,
regulations, and commission orders.

         3.14 Duct. The term "duct" refers to all SWBT ducts subject to the Pole
Attachment Act. In general, a "duct" is a single enclosed tube, pipe, or channel
for enclosing and carrying cables, wires, and other equipment. As used in this
Agreement, the term "duct" includes "inner ducts" created by subdividing a duct
into smaller channels. Except as the context otherwise requires, the term "duct"
refers only to ducts owned or controlled by SWBT and space within those ducts
and does not include cables and other telecommunications equipment located
within such ducts.

         3.15 Facilities. The terms "facility" and "facilities" refer to any
property, equipment, or items owned or controlled by any person or entity.

         3.16 FCC. The acronym "FCC" refers to the Federal Communications
Commission.

         3.17 First Interconnection Order. The term "First Interconnection
Order" refers to the First Report and Order adopted by the FCC on September 1,
1996, and released on September 8, 1996, in CC Docket No. 96-98, In the Matter
of Implementation of the Local Competition Provisions in the Telecommunications
Act of 1996 and CC Docket No. 95-185, In the Matter of Interconnection between
Local Exchange Carriers and Commercial Mobile Radio Service Providers. Access to
poles, ducts, conduits, and rights-of-way is addressed in the First
Interconnection Order in Paragraphs 1119-1240.

         3.18 Handhole. The term "handhole" refers to a structure similar in
function to a manhole, but which is too small for personnel to enter. As used in
this Agreement, the term "handhole" refers only to handholes which are part of
SWBT's conduit system and does not refer to handholes which provide access to
buried cables not housed within


                                     PAGE 6
<PAGE>   295


SWBT ducts or conduits. As used in this Agreement, the term "handhole" refers
only to handhole structures owned or controlled by SWBT and does not include
cables and other telecommunications equipment located within handhole
structures.

         3.19 Hazardous substances. The term "hazardous substances" refers to
hazardous and toxic substances, waste, pollutants, contaminants, and materials
as defined in the Comprehensive Environmental Response, Compensation and
Liability Act ("CERCLA"), 42 U.S.C. Section 9601(14), as amended, and other 
federal, state, and local health, safety, and environmental laws, ordinances, 
statutes, rules, and regulations applicable to sites subject to this Agreement, 
including but not limited to the Occupational Safety and Health Act ("OSHA"). 
In general, the term "hazardous substances" refers to any substance the 
presence, use, transport, abandonment or disposal of which (a) requires 
investigation, remediation, compensation, fine, or penalty under health,
safety, and environmental laws, ordinances, statutes, rules, and regulations
applicable to sites subject to this Agreement or (b) poses risks to human
health, safety, or the environment and is regulated under any such laws,
ordinances, statutes, rules, and regulations. For the purposes of this
Agreement, the term "hazardous substances" shall also include petroleum,
natural gas, and other combustible or noxious liquids, gases, or solids which
may accumulate at sites subject to this Agreement.

         3.20 Interconnection agreement. The term "interconnection agreement"
refers to the interconnection agreement, if any, to which this Agreement has
been made an appendix, attachment, or exhibit, or, as the context may require,
any other interconnection agreement between the parties.

         3.21 Jacket. The term "jacket" refers to a single enclosed outer
covering containing communications wires, fibers, or other communications media.
As used in this Agreement, the term "jacket" refers to the outermost sheath or
jacket of a cable.

         3.22 Joint user. The term "joint user" refers to any person or entity
which has entered or may enter into an agreement or arrangement with SWBT
permitting it to attach its facilities to SWBT's poles or place its facilities
in SWBT's ducts, conduits, or rights-of-way.

         3.23 License. The term "license" refers to a written instrument
confirming that SWBT has granted the application of Applicant or a third party
for access to pole, duct, conduit, or right-of-way space and that, based on
Applicant's or such third party's representations (and SWBT's field inspection,
if any), it appears that no further facilities modification, capacity expansion
or make-ready work by SWBT is required before facilities described in the
application are installed in the space requested. The term "license" refers to
licenses issued by SWBT pursuant to this Agreement and may, if the context
requires, refer to licenses issued by SWBT before the date of this Agreement.
The parties' use of the term "license" in this Agreement shall not be construed
as conferring authority or discretion on SWBT's part to deny access to Applicant
in any manner inconsistent with the requirements of the Pole Attachment Act, the


                                     PAGE 7
<PAGE>   296


Telecommunications Act of 1996, and applicable rules, regulations, and
commission orders.

         3.24 Local service provider ("LSP"). The terms "local service provider"
and "LSP" refer only to telecommunications carriers authorized by applicable
federal and state laws and regulations to provide local exchange service. As
used in this Agreement, these terms include SWBT.

         3.25 Maintenance duct. The term "maintenance duct" generally refers to
a full-sized duct (typically three inches in diameter or larger) which may be
used, on a short-term basis, for maintenance, repair, or emergency restoration
activities. Maintenance ducts will be available, on a nondiscriminatory basis,
to all persons and entities (including SWBT, Applicant, other local service
providers, and other joint users) with facilities in the conduit section in
which the maintenance duct is located for (a) short-term emergency repairs as
provided in Article 15 of this Agreement and (b) short-term non-emergency
maintenance or repair activities as provided in Articles 12 and 13 of this
Agreement. No more than one full-sized duct within any given conduit section
will be designated by SWBT as the maintenance duct. In those locations where, on
the effective date of this Agreement, there is not a full-sized duct available
to be used as a maintenance duct, SWBT will designate an inner duct, if one is
available, as the maintenance duct although such inner duct may be too small to
accommodate some of the cables occupying the conduit section in which such inner
duct is located. The term "maintenance duct" does not include ducts and conduits
extending from a SWBT manhole to customer premises. Maintenance ducts will not
be considered "available" (as defined in Section 3.07) for assignment to SWBT,
Applicant, or joint users for purposes other than short-term uses contemplated
in this section; provided, however, that SWBT may assign the duct currently
designated as a maintenance duct if another suitable full-sized duct will be
made available to serve as a replacement maintenance duct and may assign an
inner duct currently designated as a maintenance duct if another inner duct will
be made available to serve as a replacement maintenance duct. Maintenance duct
designations may change from time to time and may or may not be reflected in
SWBT's outside plant records. When only one usable full-sized duct remains in a
conduit section, that duct shall be deemed to be the maintenance duct.

         3.26 Make-ready work. The term "make-ready work" refers to all work
performed or to be performed to prepare SWBT's poles, ducts, conduits,
rights-of-way, and related facilities for the requested occupancy or attachment
of Applicant's facilities. Make-ready work does not include the actual
installation of Applicant's facilities. "Make-ready work" includes, but is not
limited to, clearing obstructions (e.g., by "rodding" ducts to ensure clear
passage), and rearranging, transferring, replacing, and removing existing
facilities on a pole or in a conduit system where such work is required to
accommodate Applicant's facilities (as contrasted with work performed on SWBT's
behalf in furtherance of SWBT's own business needs or convenience). "Make-ready
work" may require "dig-ups" of existing facilities and may include the repair,
enlargement or modification of SWBT's facilities (including, but not limited to,
poles,


                                     PAGE 8
<PAGE>   297


ducts, conduits, handholes, and manholes), consolidating services into fewer
cables, or the performance of other work required to make a pole, anchor, duct,
conduit, manhole, handhole, or right-of-way usable for the initial placement of
Applicant's facilities. As used in this Agreement, the term "make-ready work"
also includes associated planning and engineering work required to confirm or
determine the extent of make-ready work required and to plan make-ready
projects.

         3.27 Manhole. The term "manhole" refers to an enclosure, usually below
ground level and entered through a hole on the surface covered with a cast iron,
cast aluminum, steel, or concrete manhole cover, which personnel may enter and
use for the purpose of installing, operating, and maintaining facilities in
ducts or conduits which are parts of SWBT's conduit system. As used in this
Agreement, the term "manhole" refers only to manhole structures owned or
controlled by SWBT and does not include cables and other telecommunications
equipment located within manhole structures.

         3.28 Occupancy. The term "occupancy" refers to the presence of cables
or other facilities on a pole, in a duct or conduit, or within a right-of-way.

         3.29 Overlashing. The term "overlashing" refers to the practice of
placing an additional cable or inner duct by lashing such cable or inner duct
with spinning wire over an existing cable and strand.

         3.30 Person acting on Applicant's behalf. The terms "person acting on
Applicant's behalf," "personnel performing work on Applicant's behalf," and
similar terms include both natural persons and firms and ventures of every type,
including, but not limited to, corporations, partnerships, limited liability
companies, sole proprietorships, and joint ventures. The terms "person acting on
Applicant's behalf," "personnel performing work on Applicant's behalf," and
similar terms specifically include, but are not limited to, Applicant, its
officers, directors, employees, agents, representatives, attorneys, contractors,
subcontractors, and other persons or entities performing services at the request
of or as directed by Applicant and their respective officers, directors,
employees, agents, and representatives. An authorized contractor selected by
Applicant to perform make-ready work shall be deemed to be a person acting on
Applicant's behalf while performing such work at Applicant's request.

         3.31 Person acting on SWBT's behalf. The terms "person acting on SWBT's
behalf," "personnel performing work on SWBT's behalf," and similar terms include
both natural persons and firms and ventures of every type, including but not
limited to corporations, partnerships, limited liability companies, sole
proprietorships, and joint ventures. The terms "person acting on SWBT's behalf,"
"personnel performing work on SWBT's behalf," and similar terms specifically
include, but are not limited to, SWBT, its officers, directors, employees,
agents, representatives, attorneys, contractors, subcontractors, and other
persons or entities performing services at the request of or as directed by SWBT
and their respective officers, directors, employees, agents, and
representatives. An authorized contractor selected by SWBT to perform make-ready


                                     PAGE 9
<PAGE>   298


work shall be deemed to be a person acting on SWBT's behalf while performing
such work at SWBT's request.

         3.32 Pole. The term "pole" refers to all SWBT poles subject to the Pole
Attachment Act. Except as the context otherwise requires, the term "pole" refers
only to poles (and associated anchors) which are owned or controlled by SWBT and
does not include cables and other telecommunications equipment attached to pole
structures.

         3.33 Pole Attachment. As defined in the Pole Attachment Act, 47 U.S.C.
Section 224(a)(4), the term "pole attachment" refers to "any attachment by a
cable television system or provider of telecommunications service to a pole,
duct, conduit, or right-of-way owned or controlled by a utility." In this
Agreement, except as the context otherwise requires, the term "pole attachment"
refers to any attachment by a cable television system or provider of
telecommunications service to a pole (and associated anchors) owned or
controlled by SWBT. The term "pole attachment" includes all such facilities
attached to or supported by a SWBT pole, including but not limited to cables,
risers and U-guards, equipment boxes, drop wires, anchors, bolts, clamps, drive
rings, guys, hooks, strands, and other hardware affixed to the pole. Groupings
of associated pole attachments for billing purposes shall be consistent with
the Pole Attachment Act and applicable rules, regulations, and commission
orders. Except as otherwise authorized by applicable FCC rules, regulations, or
orders, Applicant's pole attachments occupying the same usable space (or
otherwise associated with facilities occupying the same usable space on a pole)
shall be treated as a single attachment for billing purposes.

         3.34 Pole Attachment Act. The term "Pole Attachment Act" refers to
those provisions of the Communications Act of 1934, as amended by the
Telecommunications Act of 1996, now codified as 47 U.S.C. Section 224, as those
provisions may be amended from time to time.

         3.35 Pre-license survey. The term "pre-license survey" refers to work
and activities performed or to be performed by SWBT or by persons acting on
SWBT's behalf for the primary purpose of:

              (a) confirming or determining the existing availability and
                  capacity of a pole, duct, conduit, or right-of-way and
                  identifying capacity, safety, reliability, or engineering
                  concerns, if any, relating to Applicant's application;

              (b) confirming or determining the extent, if any, to which
                  modifications to SWBT's poles, ducts, conduits, or
                  right-of-ways are required to accommodate Applicant's
                  facilities;

              (c) confirming or determining what make-ready work, if any, will
                  be required to prepare SWBT's poles, ducts, conduits, or
                  rights-of-way to accommodate Applicant's facilities; and


                                     PAGE 10
<PAGE>   299


              (d) estimating the costs, if any, that Applicant will be
                  required to pay for any such facilities modification,
                  capacity expansion, or make-ready work.

         3.36 Pre-occupancy survey. The term "pre-occupancy survey" refers to
work and activities performed or to be performed by Applicant or persons acting
on Applicant's behalf for the primary purpose of enabling Applicant to
determine:

              (a) whether SWBT's poles, ducts, conduits, or rights-of-way, in
                  their existing condition, are suitable for Applicant's
                  intended use;

              (b) the extent, if any, to which modifications of SWBT's poles,
                  ducts, conduits, or rights-of-way will be proposed by
                  Applicant to expand the capacity of SWBT's poles, ducts,
                  conduits, or rights-of-way to accommodate Applicant's
                  facilities; and

              (c) what other capacity expansion or make-ready work, if any,
                  will be proposed by Applicant to prepare SWBT's poles,
                  ducts, conduits, and rights-of-way to accommodate
                  Applicant's facilities.

         3.37 Primary point of contact. The term "primary point of contact"
refers to the persons designated by Applicant and SWBT, respectively, to
coordinate arrangements for Applicant's access to SWBT's poles, ducts, conduits,
and rights-of-way and records relating to such poles, ducts, conduits, and
rights-of-way. SWBT's designated primary point of contact shall be the Utility
Liaison Supervisor unless the parties have arranged for that function to be
performed by a designated account representative who will serve as an
intermediary between Applicant and the Utility Liaison Supervisor.

         3.38 Rights-of-way. The term "rights-of-way" refers to all SWBT
rights-of-way subject to the Pole Attachment Act. In general, rights-of-way are
legal rights to pass over or through property of another party for limited
purposes as defined in a statute, ordinance, easement, grant or other
conveyance. Rights-of-way include but are not limited to (a) public
rights-of-way which SWBT may occupy as permitted by law for the placement of its
facilities (e.g., rights-of-way on, under, or over streets, highways, and other
public roads) and (b) easements or servitudes granted by property owners or
obtained through the exercise of eminent domain authority authorizing SWBT to
pass over, place facilities on, and have rights of ingress and egress to the
property of such property owners. Rights-of-way may also include easements
which, at the time of land development or subdivision, were dedicated for use by
public or private utilities and are being occupied, in whole or in part, by
SWBT's facilities. Except as the context otherwise requires, the term
"rights-of-way" as used in this Agreement refers only to rights-of-way owned or
controlled by SWBT and does not include (a) cables and other telecommunications
equipment buried or located on such rights-of-way, (b) public rights of way
(which are owned by and subject to the control of governmental entities), or (c)


                                     PAGE 11
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any space which is owned and controlled by a third-party property owner and
occupied by SWBT with permission from such owner rather than as a matter of
legal right. As used in this Agreement, the term "right-of-way" may also include
certain fee-owned or leased property acquired by SWBT for the specific purpose
of installing poles, ducts, or conduits or burying underground cables which are
part of SWBT's network distribution facilities.

         3.39 Sheath. The term "sheath" refers to an enclosed covering
containing communications wires, fibers, or other communications media. A cable
may include both inner and outer sheaths.

         3.40 Spinning. The term "spinning" refers to a method of attaching a
cable or inner duct to a supporting strand. "Spinning" is sometimes referred to
as "lashing."

         3.41 State. When capitalized, the term "State" (as used in terms such
as "this State") refers to the State of Kansas.

         3.42 State Commission.  The term "State Commission" refers to the 
Kansas Corporation Commission.

         3.43 Strand. The term "strand" refers to support wires, typically
stranded together, or other devices attached to a pole and connecting that pole
to an anchor or to another pole for the purpose of increasing pole stability or
supporting wires, cables, and associated facilities. The term "strand" includes,
but is not limited to, strands sometimes referred to as "anchor strands,"
"anchor/guy strands," "down guys," "guy strands," "pole-to-pole guys," and
"messengers."

         3.44 Telecommunications Act of 1996.  The term "Telecommunications Act 
of 1996" refers to the Telecommunications Act of 1996, Pub. L. No. 104-104, 110 
Stat. 56, enacted February 8, 1996.

         3.45 Third party. The terms "third party" and "third parties" refer to
persons and entities other than the parties to this Agreement (that is, persons
and entities other than Applicant and SWBT).

         3.46 Utility Liaison Supervisor ("ULS"). The terms "Utility Liaison
Supervisor" and "ULS" refer to the person or persons designated by SWBT to be
responsible for handling and processing requests for access to SWBT's poles,
ducts, conduits, and rights-of-way in this State. The term "ULS" connotes
responsibility for handling a function and is not a job title. Except as
otherwise specifically provided in this Agreement or in the parties'
interconnection agreement, if any, the ULS shall serve as Applicant's single
point of contact for arranging access to SWBT's poles, ducts, conduits, and
rights-of-way and access to SWBT's records relating to SWBT's poles, ducts,
conduits, and rights-of-way. The Utility Liaison Supervisor for this State is
identified in APPENDIX VIII.


                                     PAGE 12
<PAGE>   301


         3.47 Vault. The term "vault" includes central office and controlled
environment vaults ("CEVs"). Vaults may be connected to, but are not considered
part of, SWBT's conduit system. Access, if any, to vaults (and to ducts,
conduits, and risers which serve no purpose other than to provide a means of
entry to and exit from such vaults) shall be governed by the tariffs,
agreements, or commission orders, if any, establishing arrangements for
interconnection, collocation, and access to unbundled network elements, and not
by this Agreement.

         3.48 "Vicinity of ...". When used in terms such as "vicinity of SWBT's
conduit system," "vicinity of SWBT's poles," "vicinity of SWBT's rights-of-way,"
or "vicinity of SWBT's poles, ducts, conduits, or rights-of-way," the term
"vicinity of ..." includes sites on, within, near to, surrounding, or adjoining
SWBT's poles, ducts, conduits, and rights-of-way. These sites include, but are
not limited to, all sites within a distance of 10 feet of any SWBT pole, duct,
conduit, or right-of-way.

                    ARTICLE 4: NATURE AND SCOPE OF AGREEMENT

         4.01 Scope of Agreement. This Agreement establishes the rates, terms,
conditions, and procedures for access to SWBT's poles, ducts, conduits, and
rights-of-way located within this State, without regard to whether such poles,
ducts, conduits, or rights-of-way are located on public or private property;
provided, however, that nothing contained in this Agreement shall be construed
as a grant of access to any facilities which are not poles, ducts, conduits, or
rights-of-way subject to the Pole Attachment Act or to any poles, ducts,
conduits, rights-of-way, facilities, or property owned and controlled by parties
other than SWBT. Separate tariffs or agreements, including other portions of the
parties' interconnection agreement, and not this Agreement, shall govern
Applicant's access, if any, to the following facilities which require special
security, technical, and construction arrangements outside the scope of this
Agreement:

              (a) SWBT's central office vaults and ducts and conduits which
                  serve no purpose other than to provide a means of entry to
                  and exit from SWBT's central offices;

              (b) controlled environment vaults (CEVs), huts, cabinets, and
                  other similar outside plant structures and ducts and
                  conduits which serve no purpose other than to provide a
                  means of entry to and exit from such vaults, huts, cabinets,
                  and structures;

              (c) ducts and conduits located within buildings owned by SWBT; and

              (d) ducts, conduits, equipment rooms, and similar spaces located
                  in space leased by SWBT from third-party property owners for
                  purposes other than to house cables and other equipment in
                  active service as part of SWBT's network distribution
                  operations.


                                     PAGE 13
<PAGE>   302


         4.02 No Transfer of Property Rights to Applicant. Nothing contained in
this Agreement or any license subject to this Agreement shall create or vest (or
be construed as creating or vesting) in either party any right, title, or
interest in or to any real or personal property owned by the other. The payment
of fees and charges as provided by this Agreement and licenses subject to this
Agreement shall not create or vest (or be construed as creating or vesting) in
either party any right, title, or interest in or to any real or personal
property owned by the other. No use, however extended, of SWBT's poles, ducts,
conduits, or rights-of-way shall create or vest (or be construed as creating or
vesting) in Applicant any right, title, or interest in or to any real or
personal property owned by SWBT, and the placement of Applicant's facilities on
or in SWBT's poles, ducts, conduits and rights-of-way shall not create or vest
in SWBT any right, title, or interest in such facilities.

         4.03 No Effect on SWBT's Right to Abandon, Convey or Transfer Poles,
Ducts, Conduits, or Rights-of-Way. Except as provided in subsections (a)-(d) of
this section, nothing contained in this Agreement or any license subject to this
Agreement shall in any way affect SWBT's right to abandon, convey, or transfer
to any other person or entity SWBT's interest in any of SWBT's poles, ducts,
conduits, or rights-of-way.

              (a) SWBT shall give Applicant no less than 60 days written
                  notice prior to abandoning, conveying, or transferring any
                  pole, duct, conduit, or right-of-way (1) to or in which
                  Applicant has attached or placed facilities pursuant to this
                  Agreement or (2) with respect to which Applicant has been
                  assigned pole attachment or conduit occupancy space. The
                  notice shall identify the transferee, if any, to whom any
                  such pole, duct, conduit, or right-of-way is to be conveyed
                  or transferred.

              (b) SWBT represents that prior to the effective date of this
                  Agreement, and prior to enactment of the Telecommunications
                  Act of 1996, SWBT entered into one or more "joint use pole
                  agreements" with electric utilities located in this State
                  and that such agreements may require SWBT to transfer or
                  convey poles to such electric utilities from time to time.
                  Nothing contained in this Agreement shall abridge the rights
                  of SWBT or any electric utility under any contract executed
                  prior to the effective date of this Agreement. In the event
                  of any transfer or conveyance of poles to an electric
                  utility pursuant to such a joint pole agreement, SWBT will,
                  at Applicant's request, provide Applicant and the transferee
                  utility with such information as may be necessary to
                  minimize any burdens to Applicant which may arise out of or
                  in connection with the transfer or conveyance.

              (c) Transfers of SWBT's poles, ducts, conduits, and
                  rights-of-way shall be subject to Applicant's rights at the
                  time of transfer. Applicant shall, at the request of SWBT or
                  the transferee, provide SWBT or the transferee with all
                  information required to assess Applicant's rights,
                  post-transfer


                                     PAGE 14
<PAGE>   303


                  intentions with respect to continued occupancy, and
                  willingness to negotiate new rates, terms, and conditions of
                  access. Applicant shall not unreasonably refuse to negotiate
                  with the transferee. If the transferee itself is a local
                  exchange carrier or other utility subject to the Pole
                  Attachment Act, Applicant shall, at the request of the
                  transferee, negotiate in good faith new rates, terms, and
                  conditions of access.

              (d) Transfers or conveyances of poles, ducts, conduits, or
                  rights-of-way to any entity controlling, controlled by, or
                  under common control with SWBT or to any entity which
                  acquires or succeeds to ownership of substantially all of
                  SWBT's assets shall be subject to Applicant's rights under
                  this Agreement and licenses subject to this Agreement.

         4.04 No Effect on SWBT's Rights to Manage its Poles, Ducts, Conduits,
and Rights-of-Way. Subject to Applicant's rights under this Agreement and
applicable federal and state laws, rules, regulations, and commission orders,
including, but not limited to, 47 C.F.R. Section 1.1403 (requiring 60 days'
notice of contemplated modifications), SWBT may (a) locate, relocate, move,
replace, modify, maintain, and remove all poles, ducts, conduits, and
rights-of-way subject to this Agreement at any time and in any manner as SWBT
deems appropriate and (b) enter into new agreements or arrangements with other
persons or entities permitting them to attach facilities to SWBT's poles or
place facilities in or on SWBT's ducts, conduits, or rights-of-way.

         4.05 No Right to Interfere. Except to the extent expressly provided by
the provisions of this Agreement, the provisions of this Agreement shall not be
construed as authorizing either party to this Agreement, or persons acting on
their behalf, to rearrange or interfere in any way with (a) the facilities of
the other party or joint users, (b) the use of or access to such facilities by
the other party or joint users, or (c) the ability of either party or joint
users to conduct normal business operations, serve their respective customers,
or avail themselves of new business opportunities.

         4.06 Required Franchises, Permits, Certificates, and Licenses. This
Agreement shall not be construed as relieving either party from any obligations
it may have to obtain legal authority to construct, operate, maintain, repair,
and remove its facilities on public or private property (including but not
limited to any required franchises, permits, certificates, licenses, easements,
or the like) from all appropriate public authorities and private persons or
entities.

         4.07 DISCLAIMER OF WARRANTIES. SWBT MAKES NO REPRESENTATIONS THAT
SWBT'S POLES, DUCTS, CONDUITS, OR RIGHTS-OF-WAY ARE SUITABLE FOR APPLICANT'S
INTENDED USES. SWBT MAKES NO WARRANTIES, EXPRESS OR IMPLIED, OF MERCHANTABILITY
OR FITNESS FOR A PARTICULAR PURPOSE. IN THIS AGREEMENT, SWBT MAKES NO IMPLIED
WARRANTIES OF ANY KIND.


                                     PAGE 15
<PAGE>   304


         4.08 Third-party Beneficiaries. Except as may be specifically set forth
in this Agreement, this Agreement does not provide and shall not be construed to
provide third parties with any remedy, claim, liability, reimbursement, cause of
action, or other privilege.

                       ARTICLE 5: ACCESS TO RIGHTS-OF-WAY

         5.01 Public Rights-of-Way. SWBT and Applicant agree that neither party
has the right to restrict or interfere with the other party's lawful access to
and use of public rights-of-way, including public rights-of-way which pass over
property owned by either party. Except as otherwise specifically provided in
this Agreement, SWBT and Applicant shall each be responsible for obtaining their
own rights-of-way and permission to use real or personal property owned or
controlled by any governmental body.

         5.02 Private Rights-of-Way Not Owned or Controlled by Either Party.
SWBT and Applicant agree that neither party shall restrict or interfere with the
other party's access to or right to occupy property owned by third-parties which
is not subject to the other party's control, including property as to which
either party has access subject to non-exclusive rights-of-way. Subject to the
procedures set forth in Section 5.04 below, each party shall make its own,
independent legal assessment of its right to enter upon or use the property of
third-party property owners and shall bear all expenses, including legal
expenses, involved in making such determinations.

         5.03 Access to Rights-of-Way Generally. Each pole attachment and
conduit occupancy assignment or license made, issued, or subject to this
Agreement shall include access to and use of all associated rights-of-way
including, but not limited to, rights-of-way required by Applicant for ingress,
egress, or other access to any sites where SWBT's poles or any part of SWBT's
conduit system are located, but only to the extent, if any, that SWBT has the
legal authority to grant such access and use. At locations where SWBT has access
to third-party property pursuant to non-exclusive rights-of-way, SWBT shall not
interfere with Applicant's negotiations with third-party property owners for
similar access or with Applicant's access to such property pursuant to easements
or other rights-of-ways obtained by Applicant from the property owner; provided,
however, that neither party shall conduct activities on such right-of-way which
interfere with the facilities of the other party or with the other party's
access to and use of its own facilities. At locations where SWBT has obtained
exclusive rights-of-way from third-party property owners or otherwise controls
the right-of-way, SWBT shall, to the extent space is available, and subject to
reasonable safety, reliability, and engineering conditions, provide access to
Applicant and third parties on a nondiscriminatory, first-come, first-served
basis, provided that the underlying agreement with the property owner permits
SWBT to provide such access, and provided further that Applicant agrees to
indemnify, on request defend, and hold SWBT harmless from any injury, loss,
damage, claim, or liability arising out of or in connection with such access or
use. Such access shall be granted, on a case-by-case basis, in the form of a
license, sublicense, sub-easement, or other mutually acceptable writing.
Except as otherwise agreed to by the parties, SWBT's


                                     PAGE 16
<PAGE>   305


charges for such access (obtained from SWBT rather than from the third-party
property owner) shall include (a) a pro rata portion of the charges (including
but not limited to one-time charges and recurring charges), if any, paid by SWBT
to obtain the right-of-way plus (b) any other documented legal, administrative,
and engineering costs incurred by SWBT in obtaining the right-of-way and
processing Applicant's request for access. Applicant's pro rata portion of the
charge paid by SWBT shall be negotiated on a case-by-case basis and shall take
into account the size of the area used by Applicant and the number of users
occupying the right-of-way.

         5.04 Special Procedures for Obtaining Access to Third-party Property.
Although SWBT will afford access to rights-of-way owned or controlled by it and
permit Applicant to utilize SWBT's rights-of-way to the extent that SWBT has
legal authority to do so, Applicant acknowledges that SWBT may not own or
control certain rights-of-way to the extent necessary to permit Applicant full
access to such rights-of-way. The following general principles shall be applied
with respect to access to rights-of-way on third-party property in those
situations in which SWBT does not have authority to permit Applicant access or
either party has a good faith belief that SWBT does not have such authority:

              (a) Applicant will first attempt to obtain right-of-way directly
                  from the property owner.

              (b) If Applicant has the right of eminent domain under state
                  law, Applicant will independently attempt to obtain the
                  right-of-way it seeks through the exercise of that right.

              (c) If Applicant is unable to obtain access to a right-of-way
                  under subsections (a) or (b) above, Applicant may request in
                  writing that SWBT exercise its right of eminent domain to
                  condemn the right-of-way for Applicant's use and SWBT will
                  respond to Applicant's written request within 45 days. SWBT
                  will exercise its right of eminent domain on Applicant's
                  behalf only if permitted to do so under applicable state
                  law, and only if Applicant agrees to bear all costs and
                  expenses, including but not limited to legal fees, arising
                  out of or in connection with the condemnation proceedings.

         5.05 Access to Rights-of-Way Incident to the Use of CEVs and Similar
Structures. SWBT will provide Applicant nondiscriminatory access, consistent
with the requirements of the Pole Attachment Act and Telecommunications Act of
1996, and as provided in Sections 5.03 and 5.04 above, to rights-of-way
containing Controlled Environment Vaults (CEVs), huts, cabinets, and other
similar structures. SWBT will place no restrictions on access to such
rights-of-way that are more restrictive than those SWBT places on itself;
provided, however, that neither party shall conduct activities on such
rights-of-way which interfere with the facilities of the other party, with the
privacy of communications carried over the other party's network, or with the
other party's access to and use of its own facilities. This section relates only
to access to rights-of-way and


                                     PAGE 17
<PAGE>   306


shall not be construed as granting access to the CEVs, huts, cabinets, and
similar structures located on such rights-of-way. Access, if any, to CEVs, huts,
cabinets, and similar structures, and to ducts, conduits, and risers which serve
no purpose other than to provide a means of entering or exiting such structures,
shall be governed by the tariff, agreement, or order, if any, granting Applicant
access to such structures.

         5.06 Access to Building Entrance Facilities, Building Distribution
Facilities, and Equipment Rooms. The parties acknowledge that ownership and
control of building entrance and distribution ducts, building entrance and
distribution conduits, building entrance and building distribution space,
equipment rooms, equipment closets, mechanical rooms, telephone communications
rooms, and similar spaces will vary from location to location and that the
respective rights of third-party property owners, tenants in buildings owned by
third-party property owners, telecommunications carriers, cable television
systems, and other providers of telecommunications services with respect to such
ducts, conduits, and spaces must be determined on a case-by-case basis. Each
party shall, when feasible, directly obtain from third-party property owners
such access to building entrance and building distribution ducts, building
entrance and building distribution conduits, building entrance and distribution
space, equipment rooms, equipment closets, mechanical rooms, telephone
communications rooms, and other similar areas as may be needed by such party to
serve the building owner and tenants located within buildings owned by third
parties or to access other space in the building occupied or to be occupied by
such party. In those situations in which Applicant cannot obtain from the
building owner access on terms satisfactory to Applicant, Applicant may request
access from SWBT as provided in Sections 5.03-5.04 of this Agreement; provided,
however, that a separate, building-specific notice of intent to occupy under
Section 8.02(b) or license application under Section 9.02, including such
additional information as may be necessary to identify the space to be occupied
and the facilities to be placed in such space, shall be required for access to
the facilities and space subject to this section. Any such notice or application
shall conspicuously note on its face that access to building entrance or
building distribution facilities or space is being sought. Applicant
acknowledges that SWBT must, before providing access to building space and
facilities located on or within third-party property, review applicable legal
documents and physical arrangements relating to the property, including physical
arrangements within the building. Upon completion of that review, SWBT will
notify Applicant whether Applicant's request can be granted under this
Agreement, will require access arrangements under a tariff or other applicable
agreement, or will require other special handling (e.g., direct negotiations
with the third-party property owner). Pending such notice, Applicant may not
occupy any duct, conduit, or space subject to this section pursuant to Section
8.03 without SWBT's express written consent but may exercise occupancy rights
obtained directly from the building owner. If SWBT has lawful authority to
provide such access and is required by the Pole Attachment Act to do so, SWBT
shall provide Applicant access under this Agreement. Such access shall be
negotiated on a case-by-case basis taking into account any special legal,
technical, security, or construction considerations applicable to the ducts,
conduits, or space which Applicant seeks to access. Such access, when provided,
shall only include access to


                                     PAGE 18
<PAGE>   307


ducts, conduits, and available space (as distinguished from access to cables and
other equipment not subject to the Pole Attachment Act). Such access shall be
subject to such reasonable terms and conditions as may be appropriate to protect
the equipment and other property of the parties and third parties, the
reliability of the parties' networks and the networks of third parties, and the
privacy of communications carried over the parties' networks and networks of
third parties.

              (a) Applicant's access, if any, to building entrance ducts and
                  building entrance conduits entering SWBT-owned buildings
                  (including but not limited to central offices) and access,
                  if any, to other building entrance and building distribution
                  facilities and space located within such buildings shall be
                  arranged under and shall be subject to tariffs, agreements,
                  and, if applicable, commission or court orders establishing
                  such access rights rather than this Agreement.

              (b) Applicant's access to and use of building entrance ducts,
                  building entrance conduits, building entrance space, and
                  other building entrance facilities owned and controlled by
                  third-parties shall be obtained by Applicant through direct
                  negotiations between Applicant and the third-party property
                  owners who own and control access to such facilities. If
                  SWBT owns a building entrance duct, building entrance
                  conduit, or other building entrance space, or if SWBT has
                  sufficient control over a building entrance duct, building
                  entrance conduit, or other building entrance space to permit
                  other telecommunications carriers or cable television
                  systems to have access to such ducts, conduits, or space
                  without approval or consent from the third-party property
                  owner, SWBT shall, if adequate capacity is available, and
                  subject to reasonable safety, reliability, and engineering
                  conditions, provide access to Applicant and other
                  telecommunications carriers and cable television systems on
                  a nondiscriminatory, first-come, first-served basis;
                  provided, however, that Applicant agrees to indemnify, on
                  request defend, and hold SWBT harmless from any injury,
                  loss, damage, claim or liability arising out of or in
                  connection with Applicant's access to or use of such
                  building entrance ducts, building entrance conduits, or
                  other building entrance space. Such access shall be granted,
                  on a case-by-case basis, in the form of a license,
                  sublicense, easement, sub-easement, or other mutually
                  acceptable writing and shall not include access to or the
                  right to use SWBT's cables or other SWBT telecommunications
                  equipment occupying such ducts, conduits, or space. Except
                  as otherwise agreed to by the parties, SWBT's charge for
                  such access (obtained from SWBT rather than from the
                  third-party property owner) shall include (1) a pro rata
                  portion of all charges (including but not limited to
                  one-time charges and recurring charges), if any, paid by
                  SWBT to obtain the building entrance duct, building entrance
                  conduit, or building entrance space and (2) any other
                  documented legal, administrative, engineering costs and


                                     PAGE 19
<PAGE>   308


                  construction costs incurred by SWBT to obtain such duct,
                  conduit, or space, process Applicant's request for access,
                  or prepare the facilities for Applicant's occupancy or use.
                  SWBT's charges to Applicant under this subsection shall be
                  calculated and negotiated on a case-by-case basis.

              (c) Applicant's access to and use of building distribution
                  ducts, building distribution conduits, building distribution
                  space, and other building distribution facilities owned and
                  controlled by third-parties shall be obtained by Applicant
                  through direct negotiations between Applicant and the
                  third-party property owners who own and control access to
                  such facilities. If SWBT owns a building distribution duct,
                  building distribution conduit, or other building
                  distribution space, or if SWBT has sufficient control over a
                  building distribution duct, building distribution conduit,
                  or other building distribution space to permit other
                  telecommunications carriers or cable television systems to
                  have access to such duct, conduit, or space without approval
                  or consent from the third-party property owner, SWBT shall,
                  if adequate capacity is available, and subject to reasonable
                  safety, reliability, and engineering conditions, provide
                  access to Applicant and other telecommunications carriers
                  and cable television systems on a nondiscriminatory,
                  first-come, first-served basis; provided, however, that
                  Applicant agrees to indemnify, on request defend, and hold
                  SWBT harmless from any injury, loss, damage, claim or
                  liability arising out of or in connection with Applicant's
                  access to or use of such building distribution ducts,
                  building distribution conduits, or other building
                  distribution space. Such access shall be granted, on a
                  case-by-case basis, in the form of a license, sublicense,
                  easement, sub-easement, or other mutually acceptable writing
                  and shall not include access to or the right to use SWBT's
                  cables or other SWBT telecommunications equipment occupying
                  such ducts, conduits, or space. Except as otherwise agreed
                  to by the parties, SWBT's charges for such access (obtained
                  from SWBT rather than from the third-party property owner)
                  shall include (1) a pro rata portion of all charges
                  (including but not limited to one-time charges and recurring
                  charges) paid by SWBT to obtain the building distribution
                  duct, building distribution conduit, or building
                  distribution space and (2) any other documented legal,
                  administrative, engineering costs and construction costs
                  incurred by SWBT to obtain such duct, conduit, or space,
                  process Applicant's request for access, or prepare the
                  facilities for Applicant's occupancy or use. SWBT's charges
                  to Applicant under this subsection shall be calculated and
                  negotiated on a case-by-case basis.

              (d) Access to equipment rooms, equipment closets, mechanical
                  rooms, telephone communications rooms, and similar areas
                  located in buildings owned and controlled by third-parties
                  shall be subject to access as provided in subsection (c);
                  provided, however, that when any such room


                                     PAGE 20
<PAGE>   309


                  or space is leased to SWBT on an exclusive basis (as may be
                  the case if the room or space will be used to house remote
                  switching equipment, pair gain equipment, or other network
                  equipment used to provide or support telecommunications
                  services to customers at locations outside the building in
                  which such room is located), access, if any, shall be also
                  subject to facilities collocation tariffs, agreements, or
                  arrangements.

              (e) Nothing contained in this section shall be construed as
                  authorizing Applicant to occupy space owned or controlled by
                  third parties or to utilize third-party facilities or
                  property without permission or authority from the owner of
                  such property, where such permission or authority is
                  required. Neither this section nor any license or permission
                  granted under or subject to this section shall be construed
                  as a representation by SWBT to Applicant that Applicant has
                  the right to have access to or occupy any duct, conduit, or
                  space owned and controlled by a third-party property owner
                  or to utilize any telecommunications equipment owned or
                  controlled by SWBT or any third party (including but not
                  limited to owner- or tenant-owned cables, wires, and
                  equipment located on the customer side of any network
                  interface device).

              (f) If Applicant has been granted access to a building entrance
                  or building distribution duct, conduit, or space pursuant to
                  this section, Applicant shall, at SWBT's request, relinquish
                  such access to SWBT if it is subsequently determined that
                  Applicant's use of such space will preclude SWBT from
                  meeting carrier- or provider-of-last-resort obligations to
                  customers on the premises affected.

                            ARTICLE 6: SPECIFICATIONS

         6.01 Compliance with Requirements, Specifications, and Standards.
Applicant agrees that Applicant's facilities attached to SWBT's poles or
occupying space in SWBT's ducts, conduits, and rights-of-way shall be attached,
placed, constructed, maintained, repaired, and removed in full compliance with
the requirements, specifications, and standards specified in this Agreement.

         6.02 Design to Minimize the Need for Access to SWBT's Poles, Ducts, and
Conduits. The parties shall each design their facilities to minimize the need
for the parties to access SWBT's poles, ducts, and conduits.

         6.03 Infrequent Construction Techniques and Connectivity Solutions.
Unless precluded by documented engineering criteria or written guidelines SWBT
applied to itself as of January 1, 1996, and consistent with considerations of
safety, reliability, and sound engineering practice, SWBT will permit Applicant
at its own expense to utilize the following techniques to avoid high or unusual
expenditures: (a) placement of pole attachments on both the "field" side and
"road" side of a pole; (b) placement of extension


                                     PAGE 21
<PAGE>   310


arms or stand-off brackets on poles; and (c) building conduit branches into
SWBT's conduit systems. Applicant acknowledges that use of the above techniques
will be rare, will be permitted only on a case-by-case basis, and must be
performed in a manner which does not jeopardize the structural integrity of
SWBT's facilities, the safety of personnel working on or in SWBT's poles, ducts,
or conduits, and does not render unusable other available space on the pole or
in the duct or conduit. Except as otherwise agreed to by the parties in writing,
extension arms or stand-off brackets, if utilized, shall be installed as
make-ready work in accordance with SWBT's specifications and at Applicant's
expense. Once installed, extension arms and stand-off brackets shall become part
of the pole and shall be owned by SWBT. Unused capacity on any such extension
arms or stand-off brackets shall be deemed "available" (as defined in Section
3.07) for assignment.

         6.04 Published Standards. SWBT and Applicant agree that the following
standards equally apply to either party with respect to facilities attached to
or placed in SWBT's poles, ducts, conduits, and rights-of-way and further agree
that facilities shall be placed, constructed, maintained, repaired, and removed
in accordance with current (as of the date when such work is performed) editions
of the following publications:

              (a) the Blue Book Manual of Construction Procedures, Special 
                  Report SR-TAP-001421, published by Bell Communications
                  Research, Inc. ("Bellcore"), and sometimes referred to as the
                  "Blue Book";

              (b) the National Electrical Safety Code ("NESC"), published by 
                  the Institute of Electrical and Electronic Engineers, Inc. 
                  ("IEEE"); and

              (c) the National Electrical Code ("NEC"), published by the
                  National Fire Protection Association ("NFPA").

         6.05 Additional Electrical Design Specifications: Conduit. The parties
agree that, in addition to the specifications and requirements referred to in
Sections 6.01-6.04 above, facilities placed in SWBT's conduit system after the
effective date of this Agreement shall meet the electrical design specifications
set forth in this section.

              (a) No facilities shall be placed in SWBT's conduit system in
                  violation of FCC regulations, including regulations relating
                  to electrical interference. In addition, neither party shall
                  place any facility in SWBT's conduit system which causes or
                  may cause electrical interference with the facilities of the
                  other party or joint users sufficient to jeopardize network
                  integrity or degrade the quality of any communications
                  services offered by either party or a joint user. If either
                  party is notified by the other party or a joint user that
                  its facilities are causing, or have the potential to cause,
                  unacceptable levels of electrical interference, the party
                  notified shall either correct the problem, remove the
                  facility, or initiate good faith negotiations with the
                  complaining party or joint user to resolve the issue.


                                     PAGE 22
<PAGE>   311


              (b) Facilities placed in SWBT's conduit system shall not be
                  designed to use the earth as the sole conductor for any part
                  of the circuits.

              (c) Facilities placed in SWBT's conduit system and carrying more
                  than 50 volts AC (rms) to ground or 135 volts DC to ground
                  shall be enclosed in an effectively grounded sheath or
                  shield.

              (d) No coaxial cable shall be placed in SWBT's conduit system
                  unless such cable meets the voltage limitations of Article
                  820 of the National Electrical Code.

              (e) Coaxial cable placed in SWBT's conduit system may carry
                  continuous DC voltages up to 1800 volts to ground where the
                  conductor current will not exceed one-half ampere and where
                  such cable has two separate grounded metal sheaths or
                  shields and a suitable insulating jacket over the outer
                  sheath or shield. The power supply shall be so designed and
                  maintained that the total current carried over the outer
                  sheath shall not exceed 200 microamperes under normal
                  conditions. Conditions which would increase the current over
                  this level shall be cleared promptly.

              (f) The integrity of SWBT's conduit system and overall safety of
                  personnel require that "dielectric cable" be used within
                  SWBT's conduit system when a cable facility utilizes a duct
                  or route shared in the same trench by any electric
                  transmission facilities such as the facilities of a power
                  utility.

         6.06 Additional Physical Design Specifications:  Conduit.  Facilities 
placed in SWBT's conduit system following the effective date of this Agreement 
shall meet all of the following physical design specifications:

              (a) Except as otherwise specifically agreed in this Agreement or
                  licenses subject to this Agreement, Applicant's facilities
                  shall enter SWBT's conduit system at locations consistent
                  with the physical design specifications that SWBT applies to
                  itself (typically through a manhole) or at such other
                  designated locations agreed upon in writing (e.g., through
                  the licensing process) by the parties in accordance with
                  Section 6.03 (infrequent construction techniques and
                  connectivity solutions).

              (b) Cables bound or wrapped with cloth or having any kind of
                  fibrous coverings or impregnated with an adhesive material
                  shall not be placed in SWBT's conduit or ducts.

              (c) Neither party shall circumvent the corrosion mitigation
                  measures of the other party or joint users.


                                     PAGE 23
<PAGE>   312


              (d) New construction splices in cables (including but not
                  limited to fiber optic and twisted pair cables) shall be
                  located in manholes, pull boxes or handholes.

         6.07 Efficient Use of Conduit. To ensure efficient use of conduits,
SWBT will, when cable diameters permit, install inner ducts in multiples that
fully utilize duct space (typically three or four inner ducts in a full
four-inch duct) as needed for SWBT's own business purposes and to accommodate
Applicant and other joint users; provided, however, that SWBT will not be
required to install inner duct in advance of need or in anticipation of
potential future requests for access by Applicant and other joint users. In
addition, the parties shall, in accordance with SWBT's duct selection standards,
install cables in inner duct when cable diameters permit.

         6.08 Specifications Applicable to Connections: Conduit. Except as
otherwise specifically agreed in this Agreement or licenses subject to this
Agreement, or as mutually agreed upon by the parties in writing, the following
specifications apply to connections of Applicant's ducts and conduits to SWBT's
conduit system:

              (a) Applicant shall not bore, make, or enlarge any hole in, or
                  otherwise structurally modify or alter any manhole,
                  handhole, duct, conduit, or other facility which is part of
                  SWBT's conduit system except as provided in this Agreement,
                  in licenses subject to this Agreement, or as mutually agreed
                  upon by the parties in writing.

              (b) Nothing contained in subsection (a) shall be construed as
                  precluding Applicant or qualified personnel acting on
                  Applicant's behalf from reattaching cable racks or
                  performing similar routine work which is minor in nature and
                  associated with the placement and splicing of Applicant's
                  cable.

              (c) Where Applicant's duct or facility physically connects with
                  SWBT's conduit system, the section of Applicant's duct or
                  facility which connects to SWBT's conduit system shall be
                  installed by SWBT or its contractor at Applicant's expense
                  (which will be SWBT's actual costs or the price charged SWBT
                  by the contractor performing such work). SWBT will perform
                  this work in an interval consistent with the intervals SWBT
                  performs the same or similar types of work for itself. If
                  SWBT's interval for beginning or completing this work does
                  not meet Applicant's needs, Applicant may arrange for the
                  work to be performed by an authorized contractor selected by
                  Applicant from a list, jointly developed by Applicant and
                  SWBT, of mutually agreed contractors qualified to perform
                  such work. Work performed by an authorized contractor
                  selected by Applicant to perform work under this subsection
                  shall be performed in accordance with both parties'
                  specifications and in accordance with both parties'
                  standards and practices. Each party shall


                                     PAGE 24
<PAGE>   313


                  indemnify, on request defend, and hold the other party
                  harmless from any injuries, losses, damages, claims, or
                  liabilities resulting from the performance of work by the
                  indemnifying party or by persons acting on the indemnifying
                  party's behalf under this subsection.

              (d) SWBT will have the option to monitor the entrance and exit
                  of Applicant's facilities into SWBT's conduit system and the
                  physical placement of Applicant's facilities in and removal
                  of such facilities from any part of SWBT's conduit system.
                  Notice requirements for such monitoring are addressed in
                  Section 6.11 of this Agreement.

              (e) If Applicant constructs or utilizes a duct (other than a
                  duct owned or controlled by SWBT) which is connected to
                  SWBT's conduit system, the duct and all connections between
                  that duct and SWBT's conduit system shall be sealed to
                  prevent the entry of gases or liquids into SWBT's conduit
                  system. If Applicant's duct enters a building, it shall also
                  be sealed where it enters the building and at all other
                  locations necessary to prevent the entry of gases and
                  liquids into SWBT's conduit system.

         6.09 General Requirements Relating to Personnel, Equipment, Materials,
and Public Safety. Except as otherwise specifically provided in this Agreement,
Applicant shall be responsible for selecting the employees and contractors who
will perform work on Applicant's behalf on, within, and in the vicinity of
SWBT's poles, ducts, conduits, and rights-of-way. Applicant, its contractors,
subcontractors, and other vendors acting on Applicant's behalf shall also be
responsible for selecting the personnel who perform work on Applicant's behalf
at such sites, directing the work performed by such personnel, compensating
their respective employees, and complying with all applicable laws, rules,
regulations, and agency orders relating to withholding taxes, social security
taxes, and other employment-related taxes. The provisions of this section are
intended to protect the integrity of the networks, facilities and operations of
SWBT, Applicant and joint users, to protect the health and safety of persons
working on, within, or in the vicinity of SWBT's poles, ducts, conduits, and
rights-of-way, to assure the financial responsibility of all persons and
entities performing work on, within, or in the vicinity of SWBT's poles, ducts,
conduits, and rights-of-way, and to protect the public at large. The
requirements of this section (other than the provisions of subsection (h)) shall
be reciprocal and shall apply to SWBT and personnel acting on SWBT's behalf to
the same extent they apply to Applicant.

              (a) Contractors, subcontractors, and other vendors, including
                  authorized contractors, performing work on Applicant's
                  behalf on, within, or in the vicinity of SWBT's poles,
                  ducts, conduits, or rights-of-way shall meet the same
                  financial responsibility (insurance and bonding)
                  requirements generally applicable to contractors,
                  subcontractors, and vendors performing work on SWBT's behalf
                  on, within, or in the vicinity of such


                                     PAGE 25
<PAGE>   314


                  poles, ducts, conduits, or rights-of-way. SWBT shall advise
                  Applicant of SWBT's requirements and any changes in such
                  requirements. Applicant shall be solely responsible for
                  assuring compliance with such requirements by contractors,
                  subcontractors, and other vendors acting on Applicant's
                  behalf and shall be liable to SWBT for any injury, loss, or
                  damage suffered by SWBT as a result of its failure to do so.

              (b) Only properly trained persons shall work on, within, or in
                  the vicinity of SWBT's poles, ducts, conduits, and
                  rights-of-way. Applicant shall be responsible for
                  determining that all such persons acting on Applicant's
                  behalf have proper training.

              (c) Neither Applicant nor any person acting on Applicant's
                  behalf shall permit any person to climb or work on SWBT's
                  poles or in the vicinity of SWBT's poles, or enter SWBT's
                  manholes or work within or in the vicinity of SWBT's conduit
                  system, unless such person has the training, skill, and
                  experience required to recognize potentially dangerous
                  conditions relating to the pole or conduit system and to
                  perform the work safely.

              (d) Neither Applicant nor any person acting on Applicant's
                  behalf shall permit any person acting on Applicant's behalf
                  to perform any work on, within, or in the vicinity of SWBT's
                  poles, ducts, conduits, or rights-of-way without first
                  verifying, to the extent practicable, on each date when such
                  work is to be performed, that conditions at the work site
                  (including but not limited to the physical condition of the
                  pole or any part of SWBT's conduit system) are sufficiently
                  safe for the work to be performed. If Applicant or any
                  person acting on Applicant's behalf determines that the
                  condition of any pole, duct, conduit, conduit system, or
                  right-of-way is not safe enough for the work to be
                  performed, Applicant shall notify SWBT of conditions at the
                  site and shall not proceed with the work until Applicant is
                  satisfied that the work can be safely performed.

              (e) Neither Applicant nor any person acting on Applicant's
                  behalf shall knowingly permit defective equipment or
                  materials to be used on, within, or in the vicinity of
                  SWBT's poles, ducts, conduits, or rights-of-way.

              (f) When Applicant or personnel performing work on Applicant's
                  behalf are working on, within, or in the vicinity of SWBT's
                  poles, ducts, conduits, or rights-of-way located within,
                  under, over, adjacent to, or in the vicinity of streets,
                  highways, alleys or other traveled rights-of-way, such
                  personnel shall follow procedures which Applicant deems
                  appropriate for the protection of persons and property.
                  Applicant and its contractors shall be responsible, at all
                  times, for determining and implementing the specific steps
                  required to protect persons and property at the site.
                  Applicant and its contractors


                                     PAGE 26
<PAGE>   315

                  shall be responsible, at all times, for determining and
                  implementing the specific steps required to protect persons
                  and property at the site.  Applicant and its contractors
                  shall provide all traffic control and warning devices
                  required to protect pedestrian and vehicular traffic,
                  workers, and property from danger. Applicant and its
                  contractors shall have sole responsibility for the safety of
                  all personnel performing work on Applicant's behalf, for the
                  safety of bystanders, and for insuring that all operations
                  performed by persons acting on Applicant's behalf conform to
                  current OSHA regulations and all other governmental rules,    
                  ordinances or statutes.

              (g) Neither Applicant nor any persons acting on Applicant's
                  behalf shall engage in any conduct which damages public or
                  private property in the vicinity of SWBT's poles, ducts,
                  conduits, or rights-of-way, interferes with the use or
                  enjoyment of such public or private property except as
                  expressly permitted by the owner of such property, or
                  creates a hazard or nuisance on such property (including but
                  not limited to a hazard or nuisance resulting from any
                  abandonment of Applicant's facilities, failure to remove
                  such facilities or any construction debris from the
                  property, failure to erect warning signs or barricades as
                  may be necessary to exclude others from the premises or give
                  notice to others of unsafe conditions on the premises while
                  work performed on Applicant's behalf is in progress, or
                  failure to restore the property to a safe condition after
                  such work has been completed).

              (h) Applicant shall promptly suspend activities on, within, or
                  in the vicinity of SWBT's poles, ducts, conduits, or
                  rights-of-way (other than sites owned or controlled by
                  Applicant) if notified by SWBT that such activities create
                  an unreasonable risk of injury to persons or property
                  (including unreasonable risks of service interruptions).
                  Applicant shall not resume such activities on or in the
                  vicinity of SWBT's poles or rights-of-way until Applicant is
                  satisfied that the work may safely proceed and that any
                  hazardous conditions at the site have been rectified and
                  shall not resume such activities within or in the vicinity
                  of SWBT's conduit system until both Applicant and SWBT are
                  satisfied that the work may safely proceed and that
                  hazardous conditions at the site have been rectified. In the
                  event that SWBT requires Applicant to suspend work
                  activities and it is later determined that there was no
                  reasonable basis for the work suspension, SWBT shall
                  reimburse Applicant for actual costs resulting from the
                  delay.

              (i) All personnel acting on Applicant's behalf shall, while
                  working on or in SWBT's poles, ducts, conduits, or
                  rights-of-way, carry with them suitable identification and
                  shall, upon the request of any SWBT employee or
                  representative, produce such identification.


                                     PAGE 27
<PAGE>   316


              (j) Applicant and persons acting on Applicant's behalf are
                  encouraged to report unsafe conditions on, within, or in the
                  vicinity of SWBT's poles or conduit system to SWBT.

              (k) Applicant shall establish sufficient controls and safeguards
                  to assure compliance with all provisions of this section.

         6.10 Specific Requirements Relating to Personnel, Equipment, Materials,
and Construction Practices Within or in the Vicinity of SWBT's Conduit Systems.
When Applicant, its contractors, and other persons acting on Applicant's behalf
perform work for Applicant within or in the vicinity of SWBT's ducts, conduits,
and rights-of-way where such ducts or conduits are located, they will be guided
by the following:

              (a) Except as may be mutually agreed upon by the parties in
                  writing, Applicant shall not "rod" or clear any duct or
                  inner duct in SWBT's conduit system other than a duct or
                  inner duct assigned to Applicant. Following the assignment
                  of a specific duct or inner duct to Applicant, Applicant may
                  request that SWBT rod or clear the duct or inner duct. If
                  the duct or inner duct cannot be cleared, SWBT will assign
                  the next available duct or inner duct to Applicant.
                  Applicant's request for assignment of the next available
                  duct shall be in writing, may be transmitted to SWBT via fax
                  or other transmission media mutually agreed upon by the
                  parties, and shall be processed within the same intervals
                  applicable to the processing of similar requests by SWBT's
                  own personnel.

              (b) Personnel performing work within SWBT's conduit system on
                  either party's behalf shall not climb on, step on, or
                  otherwise disturb the cables, air pipes, equipment, or other
                  facilities located in any manhole or other part of SWBT's
                  conduit system.

              (c) Personnel performing work within or in the vicinity of
                  SWBT's conduit system (including any manhole) on either
                  party's behalf shall, upon completing their work, make
                  reasonable efforts to remove all tools, unused materials,
                  wire clippings, cable sheathing and other materials brought
                  by them to the work site.

              (d) All of Applicant's facilities shall be firmly secured and
                  supported in accordance with Bellcore and industry standards
                  and any applicable construction standards adopted by SWBT
                  and applicable to SWBT's own facilities.


                                     PAGE 28
<PAGE>   317


              (e) Applicant's facilities shall be plainly identified with
                  Applicant's name in each manhole with a firmly affixed
                  permanent tag that meets the identification standards set by
                  SWBT for its own facilities.

              (f) Manhole pumping and purging required in order to allow
                  Applicant's work operations to proceed shall be performed by
                  Applicant or its contractor in accordance with the
                  requirements of Sections 6.14 and 6.15 of this Agreement.

              (g) Planks or other types of platforms shall be supported only
                  by cable racks.

              (h) Any leak detection liquid or device used by Applicant or
                  personnel performing work on Applicant's behalf within or in
                  the vicinity of SWBT's conduit system shall be of a type
                  approved by SWBT and included on SWBT's then-current list of
                  approved types of leak-detection liquids and devices;
                  provided, however, that Applicant may use any type of leak
                  detection liquid or device which meets Bellcore's published
                  standards if SWBT has not provided Applicant SWBT's list of
                  approved types of leak detection liquids or devices at least
                  60 days in advance of Applicant's work.

              (i) Applicant and its contractors shall be responsible for
                  providing proper ventilation while work is being performed
                  in SWBT's conduit system on Applicant's behalf. Except for
                  protective screens, no temporary cover shall be placed over
                  an open manhole unless it is at least four feet above the
                  surface level of the manhole opening.

              (j) Smoking or the use of any open flame is prohibited in
                  manholes, in any other portion of the conduit system, or
                  within 10 feet of any open manhole entrance.

              (k) Artificial lighting, when required by Applicant, will be
                  provided by Applicant. Only explosion-proof lighting
                  fixtures shall be used.

              (l) Neither Applicant nor personnel performing work on
                  Applicant's behalf shall allow any combustible gas, vapor,
                  liquid, or material to accumulate in SWBT's conduit system
                  (including any manhole) during work operations performed
                  within or in the vicinity of SWBT's conduit system.

              (m) Applicant shall comply with the standards set by SWBT for
                  its own personnel restricting the use of spark producing
                  tools, equipment, and devices (including but not limited to
                  such tools as electric drills and hammers, meggers,
                  breakdown sets, induction sets, and the like) in


                                     PAGE 29
<PAGE>   318


                  manholes and other portions of SWBT's conduit system,
                  provided that such standards have been communicated in
                  writing to Applicant at least 60 days in advance of the
                  construction, installation, or placement of Applicant's
                  facilities within SWBT's conduit system.

              (n) Cable lubricants used in conduit systems shall be of a type
                  or types approved by SWBT and included on SWBT's
                  then-current list of approved types of cable lubricants;
                  provided, however, that Applicant may use any type of cable
                  lubricant which meets Bellcore's published standards if SWBT
                  has not provided Applicant SWBT's list of approved types of
                  cable lubricants at least 60 days in advance of Applicant's
                  work.

         6.11 Opening of Manholes and Access to Conduit. The following
requirements apply to the opening of SWBT's manholes and access to SWBT's
conduit system.

              (a) Applicant will notify SWBT not less than 48 hours in advance
                  before entering SWBT's conduit system to perform
                  non-emergency work operations. Such operations shall be
                  conducted during normal business hours except as otherwise
                  agreed by the parties. The notice shall state the general
                  nature of the work to be performed. As a courtesy, Applicant
                  shall, when feasible, provide SWBT with 10 working days
                  advance notice before entering SWBT's conduit system. SWBT
                  shall, within 10 working days after the effective date of
                  this Agreement, advise Applicant of the manner in which
                  notices required by this section shall be given.

              (b) An authorized employee or representative of SWBT may be
                  present as a construction inspector at any time when
                  Applicant or personnel acting on Applicant's behalf enter or
                  perform work within SWBT's conduit system. Such inspectors
                  may inspect the performance and quality of the work and
                  monitor the work for compliance with the terms, conditions,
                  and specifications of this Agreement or, in the case of
                  facilities modification, capacity expansion or make-ready
                  work, the plans and specifications of the facilities
                  modification, capacity expansion, or make-ready project.
                  When SWBT inspectors are present, Applicant and its
                  contractors shall have sole authority, responsibility, and
                  control over the method or manner by which the work is to be
                  performed. SWBT's inspectors may call violations to
                  Applicant's attention but shall have no authority to direct
                  or advise Applicant or personnel acting on Applicant's
                  behalf concerning the method or manner by which the work is
                  to be performed; provided, however, that nothing contained
                  in this subsection shall relieve Applicant from complying
                  with any requirements of this Agreement.


                                     PAGE 30
<PAGE>   319


              (c) The parties contemplate that Applicant may need to perform
                  operations in SWBT's conduit system other than during normal
                  business hours and may on occasion require access to
                  manholes on shorter notice than contemplated in subsection
                  (a) above. Under these circumstances, Applicant shall notify
                  SWBT as soon as is reasonably possible of its intent to
                  enter and perform work in the conduit system and SWBT shall
                  not, without due cause and justification, insist on literal
                  compliance with scheduling requirements of subsection (a).
                  SWBT will establish procedures enabling SWBT to receive
                  notices from Applicant under this subsection 24 hours a day,
                  seven days a week.

              (d) Each party must obtain any necessary authorization from
                  appropriate authorities to open manholes for such party's
                  own conduit work and operations therein.

              (e) Applicant shall reimburse SWBT for costs associated with the
                  presence of construction inspectors only as specified in
                  APPENDIX I and only as permitted by applicable laws, rules,
                  regulations, and commission orders. SWBT shall not charge
                  Applicant for more than one such construction inspector per
                  site at any given time.

              (f) If the presence of SWBT personnel at the site is requested
                  by Applicant or, in Applicant's opinion, is integral to
                  successful completion of the work, Applicant shall pay the
                  costs of having such personnel present.

         6.12 OSHA Compliance. The parties agree that:

              (a) facilities attached to SWBT's poles or placed in SWBT's
                  ducts, conduits, and rights-of-way shall be constructed,
                  placed, maintained, repaired, and removed in accordance with
                  the Occupational Safety and Health Act (OSHA) and all rules
                  and regulations promulgated thereunder;

              (b) all persons acting on such party's behalf shall, when
                  working on, within, or in the vicinity of SWBT's poles,
                  ducts, conduits, or rights-of-way, comply with OSHA and all
                  rules and regulations thereunder; and

              (c) Applicant shall establish appropriate procedures and
                  controls to assure compliance with all requirements of this
                  section.

         6.13 Hazardous Substances. Applicant acknowledges that, from time to
time, hazardous substances (as defined in Section 3.19 of this Agreement) may
enter SWBT's conduit system and accumulate in manholes or other conduit
facilities and that hazardous substances may be present at other sites where
SWBT's poles, ducts, conduits, or rights-of-way are located.


                                     PAGE 31
<PAGE>   320


              (a) Applicant may, at its expense, perform such inspections and
                  tests at the site of any pole, duct, conduit, or
                  right-of-way occupied by or assigned to Applicant as
                  Applicant may deem necessary to determine the presence at
                  such sites of hazardous substances. SWBT will assist
                  Applicant, at Applicant's request and expense, in the
                  performance of such inspections and tests.

              (b) SWBT makes no representations to Applicant or personnel
                  performing work on Applicant's behalf that SWBT's poles,
                  ducts, conduits, or rights-of-way will be free from
                  hazardous substances at any particular time. Before entering
                  a manhole or performing any work within or in the vicinity
                  of SWBT's conduit system or any other site subject to access
                  under this Agreement, Applicant or personnel acting on
                  Applicant's behalf shall independently determine, to their
                  satisfaction, whether such hazardous substances are present
                  and conduct their work operations accordingly.

              (c) Each party shall promptly notify the other of hazardous
                  substances known by such party to be present within or in
                  the vicinity of poles, ducts, conduits, or rights-of-way
                  occupied by or assigned to Applicant pursuant to this
                  Agreement if, in the sole judgment of such party, such
                  hazardous substances create a serious danger to (1) the
                  health or safety of personnel working within or in the
                  vicinity of the conduit or (2) the physical condition of the
                  other party's facilities placed or to be placed within the
                  conduit.

              (d) Nothing contained in this Agreement (including but not
                  limited to the acknowledgments and representations set forth
                  in this section) shall relieve either party from its
                  responsibility to comply with all applicable environmental
                  laws or its responsibility for any liability arising out of
                  such party's failure to comply with such laws. Nothing
                  contained in this Agreement shall be construed as relieving
                  SWBT of liability for hazardous substances present at any
                  site subject to this Agreement or as relieving either party
                  of liability for introducing hazardous substances to the
                  site or causing or contributing to the release of any such
                  substances. Failure to comply with the requirements of this
                  section may, however, be considered in determining issues
                  relating to negligence, causation of injury, and comparative
                  responsibility for injuries to persons, property, and the
                  environment.

         6.14 Compliance with Environmental Laws and Regulations. Applicant and
SWBT agree to comply with the following provisions relating to compliance with
environmental laws and regulations.


                                     PAGE 32
<PAGE>   321


              (a) Facilities attached to SWBT's poles or placed in SWBT's
                  ducts, conduits, and rights-of-way following the effective
                  date of this Agreement shall be constructed, placed,
                  maintained, repaired, and removed in accordance with all
                  applicable federal, state, and local environmental statutes,
                  ordinances, rules, regulations, and other laws.

              (b) All persons acting on Applicant's or SWBT's behalf,
                  including but not limited to the parties' employees, agents,
                  contractors, and subcontractors, shall, when working on,
                  within or in the vicinity of SWBT's poles, ducts, conduits,
                  or rights-of-way, comply with all applicable federal, state,
                  and local environmental laws, including but not limited to
                  all environmental statutes, ordinances, rules, and
                  regulations. Applicant and personnel acting on Applicant's
                  behalf are expected to be familiar with their obligations
                  under environmental laws such as the Comprehensive
                  Environmental Response, Compensation, and Liability Act (42
                  U.S.C. Sections 9601 et seq.), the Toxic Substance Control Act
                  (15 U.S.C. Sections 2601-2629), the Clean Water Act (33 U.S.C.
                  Sections 1251 et seq.), and the Safe Drinking Water Act (42
                  U.S.C. Sections 300f-300j).

              (c) The parties shall each establish appropriate procedures and
                  controls to assure compliance with all requirements of this
                  section.

              (d) From and after the effective date of this Agreement, neither
                  party nor personnel acting on either party's behalf shall
                  discharge or release hazardous substances onto or from the
                  site of any SWBT pole, duct, conduit, or right-of-way.
                  Neither Applicant nor SWBT nor personnel acting on either
                  party's behalf shall discharge water or any other substance
                  from any SWBT manhole or other conduit facility onto public
                  or private property, including but not limited to any storm
                  water drainage system, without first determining that such
                  discharge would not violate any environmental law, create
                  any environmental risk or hazard, or damage the property of
                  any person. Applicant will be expected to test such water or
                  substance for hazardous substances in accordance with
                  then-applicable SWBT standards and practices.

              (e) Applicant and SWBT and all personnel performing work on
                  Applicant's or SWBT's behalf shall, when working on, within,
                  or in the vicinity of SWBT's poles, ducts, conduits, and
                  rights-of-way, comply with such additional standards,
                  practices, and requirements as SWBT may from time to time
                  adopt to comply with environmental laws, provided that such
                  standards are communicated in writing to Applicant at least
                  60 days in advance of Applicant's work.

         6.15 Compliance with Other Governmental Requirements (Including 
Aeronautical Navigation Safeguards).  Facilities attached to SWBT's poles or 
placed in


                                     PAGE 33
<PAGE>   322


SWBT's ducts, conduits, and rights-of-way shall be constructed, placed,
maintained, repaired, and removed in accordance with the ordinances, rules, and
regulations of any governing body having jurisdiction of the subject matter
(including but not limited to any valid ordinances, rules, and regulations
requiring permits, certificates, licenses or the like). Applicant and SWBT shall
comply with all statutes, ordinances, rules, regulations, and other laws
requiring the marking and lighting of aerial wires, cables, and other structures
to ensure that such wires, cables, and structures are not a hazard to
aeronautical navigation.

         6.16 Differences in Specifications. To the extent that there may be
differences in the specifications, the most stringent specification will apply
except as otherwise specifically provided by SWBT in writing. Applicant will
consult with SWBT when Applicant is uncertain as to which specification is to be
followed.

         6.17 Responsibility for the Condition of Facilities. Each party will be
responsible at all times for the condition of its facilities (including but not
limited to those extending from SWBT's poles, ducts, conduits, or rights-of-way
directly to any other location) and for its compliance with the requirements and
specifications of this article and all applicable laws, rules, regulations, and
ordinances.

            ARTICLE 7: PRIMARY POINTS OF CONTACT, ACCESS TO RECORDS,
                         AND PRE-OCCUPANCY INSPECTIONS

         7.01 Designation of Primary Points of Contact. Each party will, at the
request of the other party, designate a primary point of contact to facilitate
communications between the parties and the timely processing of Applicant's
applications for access to SWBT's poles, ducts, conduits, and rights-of-way
located within this State. Designations of primary points of contact will be
made by written notices including the name, title, address, phone number, and
fax number of the person designated as the primary point of contact; provided,
however, that unless and until a different designation is made, SWBT's primary
point of contact shall be the Utility Liaison Supervisor identified in APPENDIX
VIII. Designation of primary points of contact pursuant to this section will not
affect notice requirements or other legal requirements set forth in other
provisions of this Agreement.

         7.02 Determinations by Applicant of Suitability and Availability.
Applicant shall make its own, independent assessment of the suitability of
SWBT's poles, ducts, conduits, and rights-of-way for Applicant's intended
purposes.

         7.03 Access to Records Relating to SWBT's Poles, Ducts, Conduits, and
Rights-of-Way. This section establishes procedures through which certain records
and information relating to SWBT's poles, ducts, conduits, and rights-of-way
will be made available to Applicant for planning and other purposes. Access to
such records and information will be conditioned on Applicant's execution of a
nondisclosure agreement equivalent in substance to the Nondisclosure Agreement
attached to this Agreement as


                                     PAGE 34
<PAGE>   323


APPENDIX V or such other nondisclosure agreement as shall be mutually acceptable
to the parties, and no person acting on Applicant's behalf will be granted
access to such records and information without first signing such a
nondisclosure agreement. Applicant will reimburse SWBT for all reasonable costs
incurred by SWBT in granting Applicant's requests for access to records and
information under this section.

              (a) Applicant may, at any time after the effective date of this
                  Agreement, request permission to inspect SWBT's pole and
                  conduit maps and records, cable plat maps, and other plant
                  location records, if any, recording or logging assignments
                  of pole, duct, and conduit space. Applicant will be
                  permitted to examine these records during regular business
                  hours at a location where copies of such records are
                  maintained or at such other location as may be mutually
                  agreed upon by the parties. Access to such maps and records
                  will be by appointment only, and SWBT will make such maps
                  and records available for inspection by Applicant on two
                  business days advance notice; provided, however, that
                  Applicant will, as a courtesy, when feasible, provide SWBT
                  with 10 business days advance notice of its intent to
                  examine such records.

              (b) The access described in subsection (a) shall include the
                  right to make copies, at Applicant's expense, except for
                  cable plat maps, which shall be made available for
                  inspection only. In all instances, such access shall include
                  the ability to take notes and make drawings with references
                  to those maps and records. No references to cable counts or
                  circuit information may be included in any such copies,
                  notes, or drawings. With respect to other cable-specific or
                  customer-specific information, Applicant's copies, notes, or
                  drawings may include only such information as needed for
                  bona fide engineering and construction purposes (e.g.,
                  proposing cable consolidations and identifying plant
                  discrepancies) and not for sales, marketing, competitive
                  intelligence, competitive analysis, strategic planning, and
                  similar activities. Applicant's copies, notes, and drawings
                  may include estimates regarding the physical characteristics
                  (such as size and weight) of cables when necessary to make
                  engineering determinations regarding the capacity, safety,
                  reliability, or suitability of SWBT's poles, ducts,
                  conduits, and rights-of-way for Applicant's intended uses.

              (c) SWBT will provide Applicant the best information available
                  from SWBT's current pole and conduit maps and records, cable
                  plat maps, and other outside plant and construction records.
                  SWBT represents that such records reflect approximate
                  geographical locations of the facilities depicted and may
                  not accurately reflect information such as:

                  (1)  the exact location of the facilities depicted;


                                     PAGE 35

<PAGE>   324


                  (2) the physical size, characteristics, or condition of the
                      facilities depicted;

                  (3)  the ducts or inner ducts presently occupied, assigned,
                       or available within any particular conduit segment or
                       manhole;

                  (4)  the arrangement of facilities attached to a pole, the
                       position of facilities suspended between poles or their
                       relationship to each other and to the ground, or the
                       positioning of cables and other facilities housed
                       within ducts, conduits, manholes or other portions of
                       SWBT's conduit system; and

                  (5)  other information which must be assessed before it can
                       be determined that space is available on or in a pole,
                       duct, or conduit for the attachment or occupancy of
                       Applicant's facilities or that the poles, ducts, or
                       conduits depicted are suitable for Applicant's intended
                       use.

         7.04 Pre-occupancy Inspection of Poles, Ducts, Conduits and
Rights-of-Way. Applicant shall be permitted to view and inspect specified poles,
ducts, conduits, and rights-of-way on a pre-occupancy basis as provided in this
section.

              (a) After the effective date of this Agreement, Applicant may
                  view specified poles, ducts, conduits, and rights-of-way on
                  a pre-occupancy basis. Nothing contained in this section
                  shall preclude Applicant from visually inspecting SWBT's
                  poles, ducts, conduits, or rights-of-way from any vantage
                  point lawfully accessible to Applicant without SWBT's
                  permission.

              (b) Applicant shall not enter any SWBT manhole for the purpose
                  of performing a pre-occupancy inspection without complying
                  with all applicable requirements set forth in Article 6 of
                  this Agreement, including but not limited to the provisions
                  of Section 6.11 relating to the opening of manholes.

              ARTICLE 8: POLE, DUCT, AND CONDUIT SPACE ASSIGNMENTS

         8.01 Selection of Space. Applicant will select the space Applicant will
occupy on SWBT's poles or in SWBT's conduit systems. Applicant's selections will
be based on the same criteria SWBT applies to itself. To enable Applicant to
make such selections in accordance with SWBT's criteria, SWBT will provide
Applicant information about the network guidelines and engineering protocols
used by SWBT in determining the placement of facilities on SWBT's poles and in
SWBT's conduit systems. In conduit systems owned or controlled by SWBT,
maintenance ducts (as defined in Section 3.25) shall not be considered available
for Applicant's use except as specifically provided


                                     PAGE 36
<PAGE>   325


elsewhere in this Agreement. All other ducts, inner ducts, sub-ducts, and
partitioned conduits which are not assigned or occupied shall be deemed
available for use by SWBT, Applicant, and third parties entitled to access under
the Pole Attachment Act.

         8.02 Pole, Duct, and Conduit Space Assignments. Pole, duct, and conduit
space selected by Applicant will be assigned to Applicant as provided in this
section. Information received by SWBT in connection with this section shall be
subject to the provisions of Article 28 of this Agreement (Confidentiality of
Information).

              (a) After Applicant's application for a pole attachment or
                  conduit occupancy license has been received by SWBT, the
                  pole, duct, and conduit space selected by Applicant in such
                  application will be assigned to Applicant for a
                  pre-occupancy period not to exceed 12 months. The assignment
                  (and date and time of assignment) will be logged and
                  recorded in the appropriate SWBT records. If such space has
                  been provisionally assigned to Applicant as authorized below
                  in subsection (b), the 12-month pre-occupancy assignment
                  period will begin on the date the provisional assignment is
                  recorded in SWBT's records or the date of SWBT's receipt of
                  Applicant's notice of intent to occupy under subsection (b),
                  whichever date first occurs.

              (b) SWBT shall, within 60 days after the effective date of this
                  Agreement, adopt interim procedures which will enable pole,
                  duct, and conduit space to be provisionally assigned to
                  Applicant and other applicants prior to the submission of
                  formal applications required pursuant to Section 9.02 of
                  this Agreement. Where indicated below, the interim
                  procedures will apply to the assignment of space to SWBT as
                  well as to Applicant and other applicants. SWBT may, on 60
                  days advance notice to Applicant, revise such interim
                  procedures if such procedures prove to be unworkable, in
                  which event Applicant may challenge SWBT's decision in
                  accordance with procedures available to Applicant under
                  applicable federal and state laws and regulations. The
                  procedures will enable Applicant and other applicants, by
                  written notice, to advise SWBT of their intent to occupy
                  unassigned space which appears, from SWBT's records, to be
                  available for assignment. Upon receipt of such notice, SWBT
                  shall date-and-time stamp the notice and provisionally
                  assign the space selected by Applicant or such other
                  applicant by logging and recording the assignment (and date
                  and time of assignment) in the appropriate SWBT records,
                  which records will be available for inspection as provided
                  in Section 7.03 of this Agreement. Space provisionally
                  assigned to Applicant or such other applicant will not be
                  available for assignment to any other person or entity,
                  including SWBT. Notwithstanding such provisional assignment,
                  Applicant shall not occupy such space without first
                  obtaining a license, except as provided in Section 8.03. The
                  following additional requirements shall apply.


                                     PAGE 37
<PAGE>   326


                  (1)  Before giving SWBT notice of its intent to occupy
                       unassigned space, Applicant shall make a good faith
                       determination that it actually plans to occupy such
                       space. The assignment process shall not be used by
                       either party for the purpose of holding or reserving
                       space which such party does not plan to use or for the
                       purpose of precluding SWBT or any other person or
                       entity from utilizing or having access to SWBT's poles,
                       ducts, conduits, or rights-of-way.

                  (2)  With respect to unassigned conduit occupancy space, the
                       notice must include all information required to enable
                       SWBT and joint users, including other persons or
                       entities which may from time to time seek space in the
                       same ducts and conduits, to determine the specific
                       space which Applicant desires to occupy. The notice
                       must, therefore, include, at a minimum, the following
                       information:

                       (i)   the specific conduit sections, and each manhole, 
                             to be occupied;

                       (ii)  the number of ducts, and number of inner ducts,
                             to be occupied by Applicant within each conduit
                             section;

                       (iii) the physical size (diameter) of the cables to be
                             placed in such duct, if known, or the maximum and
                             minimum sizes of the cables which may be placed
                             if more than one size cable is being considered
                             for the space to be occupied;

                       (iv)  the anticipated use by Applicant of any
                             infrequent construction techniques and
                             connectivity solutions authorized under Section
                             6.03 to avoid high or unusual expenditures;

                       (v)   Applicant's best estimates of the dates when
                             Applicant plans to begin and complete
                             construction at the sites specified in the
                             notice;

                       (vi)  if applicable, a conspicuous statement that
                             Applicant intends to occupy the space before the
                             issuance of a license, as provided in Section
                             8.03 of this Agreement; and

                       (vii) if applicable, a conspicuous statement, as
                             required by Section 5.06 of this Agreement, that
                             the notice pertains to a building entrance or
                             building distribution duct or conduit or other
                             space within a building.


                                     PAGE 38
<PAGE>   327


                  (3)  With respect to unassigned pole space, such notice must
                       include all information required to enable SWBT and
                       other joint users, including other persons or entities
                       seeking space on the same poles, to determine the
                       specific space which Applicant desires to occupy. The
                       notice must, therefore, include, at a minimum, the
                       following information:

                       (i)   the specific poles to be occupied;

                       (ii)  the specific space on each pole to be occupied,
                             including the height (distance from the ground)
                             of the attachment and the side (road or field)
                             where the attachment is to be made;

                       (iii) the anticipated number and types of cables to be
                             attached, together with the anticipated physical
                             size (diameter) and weight (weight per foot) of
                             such cables, and the anticipated number and types
                             of strands, if any, to be used to support the
                             cables, such information to be sufficient to give
                             notice to SWBT and other joint users of the
                             remaining space on the pole available and what
                             facilities modification, capacity expansion, or
                             make-ready work may be required of subsequent
                             applicants as a result of the provisional
                             assignment of space to Applicant;

                       (iv)  the anticipated use by Applicant of any
                             infrequent construction techniques and
                             connectivity solutions authorized under Section
                             6.03 to avoid high or unusual expenditures;

                       (v)   Applicant's best estimates of the dates when
                             Applicant plans to begin and complete
                             construction at the sites specified in the
                             notice; and

                       (vi)  if applicable, a conspicuous statement that
                             Applicant intends to occupy the space before the
                             issuance of a license, as provided in Section
                             8.03 of this Agreement.

                  (4)  No later than 30 days after giving such notice,
                       Applicant shall file an application under Section 9.02
                       or the provisional assignment will lapse.

                  (5)  As stated in Section 7.03(c), SWBT does not represent
                       that its records accurately reflect the information
                       necessary to enable Applicant to rely upon a
                       records-based assignment process. SWBT shall have no
                       duty to verify that space provisionally assigned
                       pursuant to this subsection is actually available.


                                     PAGE 39
<PAGE>   328


              (c) Assignments made prior to the issuance of a license will be
                  provisional assignments and will be subject to modification
                  if it is subsequently determined that the space selected by
                  or assigned to Applicant is already occupied or that a
                  different assignment is required to comply with SWBT's
                  standards for assigning pole, duct, and conduit occupancy
                  space.

              (d) Applicant's obligation to pay semiannual pole attachment or
                  conduit occupancy fees will commence from the date of
                  assignment or provisional assignment, as logged and recorded
                  in the appropriate SWBT records.

              (e) During the 12-month assignment period following the date
                  space is assigned to Applicant and entered into the
                  appropriate SWBT record, SWBT shall not occupy or use such
                  space without Applicant's permission, shall not assign such
                  space to any party other than Applicant, and shall not
                  knowingly permit any party other than Applicant to occupy or
                  use such space without Applicant's permission except as
                  otherwise specifically provided in this Agreement. The
                  assignment to Applicant will automatically lapse 12 months
                  after the date the assignment has been entered into the
                  appropriate SWBT record if Applicant has not occupied such
                  assigned space within such 12-month period; provided,
                  however, that if Applicant's failure to occupy the space
                  within such 12-month period results from SWBT's failure to
                  perform make-ready work on schedule, the parties shall
                  negotiate a single extension of the assignment period, which
                  extension shall not extend the assignment period beyond
                  three months from the date of completion of SWBT's
                  make-ready work; and, provided further, that if Applicant
                  can demonstrate that its failure to occupy the space within
                  such 12-month period results from the actions of SWBT or
                  third parties other than persons acting on Applicant's
                  behalf, or from acts of God, the assignment may be extended
                  for a period no longer than three months from the date
                  Applicant is first able to commence construction activities
                  at the site involved. Assignments to third parties shall be
                  subject to the same rules applicable to Applicant under this
                  subsection. Extensions permitted under this subsection must
                  be requested in writing before expiration of the original
                  12-month period and shall be recorded on the appropriate
                  SWBT records available for inspection under Section 7.03.

              (f) SWBT may assign space to itself by making appropriate
                  entries in the same records used to log assignments to
                  Applicant and third parties. If SWBT assigns pole, duct, or
                  conduit space to itself, such assignment will automatically
                  lapse 12 months after the date the assignment has been
                  entered into the appropriate SWBT record if SWBT has not
                  occupied such assigned space within such 12-month period;
                  provided,


                                     PAGE 40
<PAGE>   329


                  however, that if SWBT's failure to occupy the space within
                  such 12-month period results from the actions of Applicant
                  or third parties other than persons acting on SWBT's behalf,
                  or from acts of God, SWBT's assignment may be extended for a
                  period no longer than three months from the date SWBT is
                  able to commence construction at the site involved.
                  Extensions permitted under this subsection must be recorded
                  before expiration of the original 12-month period on the
                  appropriate SWBT records available for inspection under
                  Section 7.03.

              (g) If facilities modifications, capacity expansions, or other
                  make-ready work are required due to the assignment of space
                  to either party under this section, the party to whom such
                  space has been assigned will reimburse the person or entity
                  incurring the costs for such facilities modifications,
                  capacity expansions, or make-ready work if the party to whom
                  such space has been assigned fails to occupy the assigned
                  space within the 12-month assignment period or any extension
                  thereof.

              (h) Except as provided in subsections (e)-(f) above, assignments
                  shall not be extended, renewed, or sequentially repeated in
                  any manner (other than by actual occupancy) that enables
                  Applicant, SWBT, or any joint user to preclude access by
                  others to unused pole attachment or conduit occupancy space
                  for any period greater than 12 months after the date of
                  initial assignment.

              (i) At Applicant's election, Applicant may file an application
                  for access which specifically requests that the space sought
                  by Applicant not be assigned to Applicant immediately and
                  not be recorded immediately in the SWBT records available
                  for inspection by other telecommunications carriers, cable
                  television systems, or other providers of telecommunications
                  services under Section 7.03 of this Agreement. In that
                  event, the space sought by Applicant will not be assigned to
                  Applicant and will remain available for assignment to others
                  without restriction until such time as such space is
                  formally assigned to Applicant in accordance with
                  Applicant's written instructions and the assignment is
                  recorded in the records available for inspection under
                  Section 7.03. The assignment shall be made no later than the
                  date of issuance to Applicant of a license confirming that
                  Applicant has the right to occupy the space described in the
                  license. In the event that Applicant elects to proceed under
                  this subsection, Applicant's obligation to pay pole
                  attachment and conduit occupancy fees shall not commence
                  until the date the assignment is recorded in the appropriate
                  SWBT records and Applicant shall bear the risks that (1) the
                  space sought by Applicant will be assigned to and occupied
                  by another person or entity or (2) circumstances will occur
                  which may require that SWBT reevaluate


                                     PAGE 41
<PAGE>   330


                  Applicant's application and repeat the field inspection
                  portion of the pre-license survey at Applicant's expense.

              (j) Notices and applications including assignment requests will
                  be date- and time-stamped on receipt. Because space will be
                  selected and further assignments made based on entries
                  logged and recorded in the appropriate SWBT records, the
                  date and time of assignment will be the date and time when
                  the assignment is recorded rather than the date and time of
                  receipt of the application or notice requesting such
                  assignment. Although SWBT's clerical personnel will promptly
                  process assignment requests included in applications and
                  notices transmitted to SWBT by mail, courier, fax, or other
                  transmission media, SWBT shall not be liable for any failure
                  by Applicant to obtain the space desired by Applicant due to
                  delay in logging assignment requests. Applicant acknowledges
                  that, to maximize the probability that Applicant will be
                  assigned the space Applicant desires, Applicant should, when
                  possible, submit applications and notices including
                  assignment requests in person to SWBT at the site where the
                  applicable records are maintained and should countersign the
                  entry reflecting the assignment and time of assignment.

         8.03 Immediate Occupancy. SWBT shall, within 60 days after the
effective date of this Agreement, adopt interim procedures which will provide
Applicant the ability to attach or place facilities on or in SWBT's poles,
ducts, conduits, and rights-of-way on an immediate basis when such space is
available for Applicant's use and no make-ready work or infrequent construction
techniques or connectivity solutions are required. SWBT may, on 60 days advance
notice to Applicant, revise or terminate such interim procedures if they prove
to be unworkable, in which event Applicant may seek renegotiation of this
Agreement or challenge SWBT's decision in accordance with procedures available
to Applicant under applicable federal and state laws, regulations, and
commission orders. The special procedures established under this section shall
supplement, rather than replace, the regular assignment and licensing procedures
set forth in Articles 8-10 of this Agreement, are intended to be used only under
special circumstances (e.g., when the regular procedures allow insufficient time
to meet customer service commitments or resolve non-routine construction or
network contingencies), shall not be used on a routine basis, and shall be
consistent with subsections (a)-(f) below.

              (a) Upon giving SWBT the notice required by this subsection,
                  Applicant may immediately occupy space assigned or
                  provisionally assigned to Applicant pursuant to Section 8.02
                  of this Agreement. The notice shall be contained in either a
                  notice of intent to occupy as provided in Section 8.02(b) or
                  a license application under Section 9.02. Applicant shall
                  not give such notice or occupy such space without first
                  reviewing SWBT's records and determining that the records
                  reflect that the space sought is available.


                                     PAGE 42
<PAGE>   331


              (b) Applicant shall not occupy space which has not been assigned
                  or provisionally assigned to Applicant. The assignment must
                  be recorded on the appropriate SWBT records, as provided in
                  Section 8.02, prior to Applicant's occupancy. If Applicant
                  subsequently determines that the records are inaccurate and
                  that the space assigned to Applicant is not available, or
                  that the space assigned is not suitable for Applicant's
                  intended use, Applicant shall, within one business day,
                  notify SWBT in writing that it no longer intends to occupy
                  the space earlier assigned and is releasing the assignment.
                  Except as otherwise provided in this subsection, Applicant
                  shall not occupy other space on the pole or in the duct or
                  conduit without first obtaining an assignment or provisional
                  assignment of the space which Applicant will occupy. To
                  avoid high or unusual expenditures resulting from
                  unanticipated conditions at the site, Applicant may occupy
                  space not assigned to Applicant subject to the following
                  terms and conditions.

                  (1)  Applicant may occupy the next available space shown on
                       SWBT's records as available at the time of Applicant's
                       last review of the records. Applicant shall not
                       knowingly occupy space occupied by or assigned to SWBT
                       or any third party without consent of the party to whom
                       the space has been assigned.

                  (2)  Within one business day after occupying such space,
                       Applicant shall submit to SWBT a written notice of
                       intent to occupy or an application for the space
                       occupied showing the reason for Applicant's use of the
                       space occupied.

                  (3)  Applicant shall bear the risk that space occupied by
                       Applicant pursuant to this section was assigned to SWBT
                       or a third party during the period between Applicant's
                       last review of the records and Applicant's occupancy of
                       such space. After occupying space not previously
                       assigned to Applicant, Applicant shall review the
                       records and promptly notify the affected party if
                       Applicant determines that it has occupied space
                       assigned to such party. At the request of the party to
                       whom such space has been assigned, Applicant shall,
                       within 24 hours, or within such other period of time
                       mutually agreed to by the parties affected, remove its
                       facilities from the space in question if the parties
                       affected cannot reach an acceptable alternative
                       solution. SWBT and Applicant anticipate that all
                       parties affected will act in good faith to work out
                       acceptable solutions and that the parties affected will
                       not insist on strict adherence to the 24-hour removal
                       requirement unless there is a legitimate business need
                       for compelling removal within such time period.


                                     PAGE 43
<PAGE>   332


                  (4)  SWBT shall be entitled to recover from Applicant actual
                       costs, if any, directly incurred by SWBT as a result of
                       Applicant's decision under this subsection to occupy
                       space subject to a valid prior assignment to SWBT.
                       Applicant shall indemnify, on request defend, and save
                       SWBT harmless from any injury, loss, damage, liability,
                       or claim asserted against SWBT by any third party
                       resulting from Applicant's decision under this
                       subsection to occupy space assigned to such third
                       party.

              (c) Nothing in this section authorizes Applicant to place its
                  facilities on or in any pole, duct, or conduit space already
                  occupied by the facilities of SWBT or a third party, even if
                  the presence of such facilities is not reflected on SWBT's
                  records.

              (d) Nothing in this section authorizes Applicant, without first
                  obtaining SWBT's written authorization, to (1) place its
                  facilities on any pole or in any duct or conduit that
                  requires make-ready work (other than third-party make-ready
                  work arranged directly by Applicant) or (2) utilize any
                  infrequent construction technique or connectivity solution
                  described in Section 6.03.

              (e) If Applicant has not done so already, within 24 hours after
                  occupying space pursuant to this section, Applicant will
                  submit to SWBT an application for the space occupied as
                  provided in Section 9.02 of this Agreement. The application
                  may be submitted by fax.

              (f) Applicant will bear all risks resulting from the possibility
                  that assigned space which appears from the records to be
                  available is not available or in suitable condition to be
                  used by Applicant and shall indemnify, on request defend,
                  and hold SWBT harmless from any injury, loss, damage, claim,
                  or liability (including but not limited to third-party
                  claims) resulting from Applicant's occupancy of space in
                  violation of this section.

                 ARTICLE 9: APPLICATIONS AND PRE-LICENSE SURVEYS

         9.01 Licenses Required. Except as otherwise specifically permitted in
this Agreement, Applicant shall apply in writing for and receive a license
before attaching facilities to specified SWBT poles or placing facilities within
specified SWBT ducts, conduits, manholes, or handholes. License applications and
information received by SWBT in connection with such applications shall be
subject to the provisions of Article 28 of this Agreement (Confidentiality of
Information).

         9.02 Application Form.  To apply for a pole attachment or conduit 
occupancy license under this Agreement, Applicant shall submit to SWBT two 
signed copies of the


                                     PAGE 44
<PAGE>   333


appropriate application forms. SWBT represents that the forms specified in
subsections (a)-(b) are forms in use prior to the effective date of this
Agreement and that SWBT is in the process of revising such forms to conform to
the provisions of this Agreement and to streamline the application process. The
parties therefore agree that the forms specified in subsections (a) and (b) will
be interim forms only. SWBT reserves the right to change the format and content
of these forms upon 60 days written notice to Applicant.

              (a) To apply for a pole attachment license, Applicant shall
                  submit to SWBT two signed copies of SWBT's Form SW-9434
                  ("Access Application and Make-Ready Authorization") together
                  with completed Form SW-9433 ("Pole Attachments"). An
                  application for a pole attachment license will not be
                  complete or subject to processing by SWBT until these forms
                  have been submitted to SWBT; provided, however, that such
                  forms will be deemed to be substantially complete if they
                  contain the information specified in subsections (c)-(h)
                  below, as applicable. Copies of Forms SW-9433 and SW-9434
                  are attached to this Agreement as parts of APPENDIX III.

              (b) To apply for a conduit occupancy license, Applicant shall
                  submit to SWBT two signed copies of SWBT's Form SW-9434
                  ("Access Application and Make-Ready Authorization") together
                  with completed Form SW-9435 ("Conduit Occupancy"). An
                  application for a conduit occupancy license will not be
                  complete or subject to processing by SWBT until these forms
                  have been submitted to SWBT; provided, however, that such
                  forms will be deemed to be substantially complete if they
                  contain the information specified in subsections (c)-(h)
                  below, as applicable. Copies of Forms SW-9434 and SW-9435
                  are attached to this Agreement as parts of APPENDIX III.

              (c) Each application for a license under this Agreement shall
                  include, at a minimum, the following information:

                  (1)  the poles, ducts, and conduits (including all manholes)
                       along Applicant's proposed route to or within which
                       Applicant desires to attach or place its facilities;

                  (2)  a description of the facilities to be attached to
                       SWBT's poles and a description of the facilities to be
                       placed within each component of SWBT's conduit system
                       (including but not limited to ducts, conduits,
                       manholes, and handholes) along the proposed route;

                  (3)  for poles, the proposed points of attachment;

                  (4)  for building entrance or building distribution ducts or
                       conduits or other space within a building, a
                       conspicuous statement, as required


                                     PAGE 45
<PAGE>   334


                       by Section 5.06 of this Agreement, that the application
                       pertains to a building entrance or building
                       distribution duct or conduit or other space within a
                       building;

                  (5)  if applicable, a conspicuous notation that the space
                       requested is not to be assigned (or billed) to
                       Applicant until SWBT has received Applicant's written
                       instruction to make such assignment or issued a license
                       authorizing Applicant to occupy the space requested;
                       and

                  (6)  if applicable, a conspicuous statement that Applicant
                       intends to occupy the space before the issuance of a
                       license, as provided in Section 8.03 of this Agreement.

              (d) Facilities descriptions which apply to multiple pole
                  attachments or conduit occupancies need only be described
                  once on any form. Facilities descriptions shall include, at
                  a minimum, the following information:

                  (1)  the number and types of cables, including the physical
                       size (diameter) and weight (weight per foot);

                  (2)  the number and types of strands, if any, which will be
                       used to support the cables, including the rated holding
                       capacity expressed in thousand pound increments (e.g.,
                       2.2M) of such strands; and

                  (3)  sufficient information to identify and describe the
                       physical characteristics (size, dimensions, and weight)
                       of apparatus enclosures and other facilities to be
                       attached to SWBT's poles or placed in SWBT's conduit
                       system.

              (e) When it appears to Applicant that facilities modification,
                  capacity expansion, or make-ready work may be required to
                  accommodate Applicant's access requests, Applicant shall
                  describe the facilities modification, capacity expansion, or
                  make-ready work which Applicant proposes. Applicant shall
                  also describe its plans, if any, to use any infrequent
                  construction technique or connectivity solution authorized
                  under Section 6.03 to avoid high or unusual expenditures and
                  state its reasons for the use of such technique or solution.

              (f) Applicant acknowledges that the poles along a particular
                  pole line or route may include poles owned by firms (such as
                  electric utilities) other than SWBT, that it may be
                  necessary for SWBT to rearrange its facilities or perform
                  other make-ready work on poles other than poles it owns or
                  controls in order to accommodate Applicant's request for
                  access to SWBT's poles and that, at the time an application
                  is submitted, it may be difficult for Applicant to determine
                  with certainty whether a particular


                                     PAGE 46
<PAGE>   335


                  pole is owned or controlled by SWBT or by another entity.
                  Accordingly, the application shall, to the extent feasible,
                  identify all poles utilized by SWBT (without regard to
                  ownership) along Applicant's proposed route.

              (g) Each application for a license under this Agreement shall be
                  accompanied by a construction schedule showing Applicant's
                  projected dates for beginning and completing construction at
                  the sites specified in the application. Information on this
                  schedule may be used by SWBT's engineering and outside plant
                  construction personnel in scheduling work required to
                  process Applicant's applications and scheduling such
                  capacity expansions, make-ready work, and facilities
                  modifications, if any, as may be necessary to accommodate
                  Applicant's facilities.

              (h) Applicant may include multiple cables in a single license
                  application and may provide multiple services (e.g., CATV
                  and non-CATV services) under the same cable sheath or
                  jacket. When both CATV and non-CATV services are provided
                  under the same cable sheath or jacket, or CATV and non-CATV
                  services are provided using different cables attached or
                  lashed to the same strand or otherwise occupying the same
                  space on a pole or the same duct or inner duct within a
                  conduit, Applicant will so advise SWBT and SWBT shall, if
                  permitted by law, adjust its charges to enable SWBT to
                  charge Applicant the rate applicable to telecommunications
                  carriers rather than the rate applicable to cable television
                  systems solely to provide cable service.

         9.03 Cooperation in the Application Process. The orderly processing of
applications submitted by Applicant and other firms seeking access to SWBT's
poles, ducts, conduits, and rights-of-way requires good faith cooperation and
coordination between SWBT's personnel and personnel acting on behalf of
Applicant and other firms seeking access. The parties therefore agree to the
following transitional procedures which will remain in effect during the term of
this Agreement unless earlier modified by mutual agreement of the parties.

              (a) Before submitting a formal written application for access to
                  SWBT's poles, ducts, conduits, and rights-of-way, the firm
                  submitting the application shall make a good faith
                  determination that it actually plans to attach facilities to
                  or place facilities within the poles, ducts, conduits, or
                  rights-of-way specified in the application. Applications
                  shall not be submitted for the purpose of holding or
                  reserving space which the applicant does not plan to use or
                  for the purpose of precluding SWBT or any other provider of
                  telecommunications or cable television services from using
                  such poles, ducts, conduits, or rights-of-way.


                                     PAGE 47
<PAGE>   336


              (b) Applicant shall only submit applications for access to
                  poles, ducts, conduits, and rights-of-way which it plans to
                  use within one year following the date access is granted and
                  shall use its best efforts to submit applications in an
                  orderly manner in accordance with Applicant's needs. If
                  Applicant contemplates the need to submit more than 10
                  applications within any 45-day period with respect to poles,
                  ducts, conduits, and rights-of-way within the territory of
                  any single SWBT construction district, Applicant shall give
                  SWBT advance notice as promptly as is reasonably
                  practicable.

              (c) No more than 300 poles shall be the subject of any single
                  pole attachment license application.

              (d) No more than 20 manholes shall be the subject of any single
                  conduit occupancy license application.

         9.04 Applicant's Priorities. When Applicant has multiple applications
on file within a single SWBT construction district, Applicant shall, at SWBT's
request, designate its desired priority of completion of pre-license surveys,
facilities modifications, capacity expansions, and make-ready work with respect
to all such applications.

         9.05 Pre-license Survey. A pre-license survey (including a review of
records and field inspection, if necessary) will be completed by SWBT after
Applicant has submitted its written license application as specified in Section
9.02 of this Agreement. SWBT shall not, without due cause and justification,
repeat pre-occupancy survey work performed by Applicant.

              (a) The field inspection portion of the pre-license survey,
                  which includes the visual inspection of existing pole and
                  conduit facilities, shall be performed by SWBT or its
                  authorized representative. Primary purposes of the field
                  inspection will be to enable SWBT to (1) confirm or
                  determine the facilities modification, capacity expansion,
                  and make-ready work, if any, necessary to accommodate
                  Applicant's facilities; (2) plan and engineer the facilities
                  modification, capacity expansion, and make-ready work, if
                  any, required to prepare SWBT's poles, ducts, conduits,
                  rights-of-way, and associated facilities for Applicant's
                  proposed attachments or occupancy; and (3) estimate the
                  costs associated with such facilities modification, capacity
                  expansion, or make-ready work. SWBT may dispense with the
                  field inspection if it appears that the information
                  necessary to process Applicant's license application is
                  already available from existing sources, including the
                  application forms and such other information as may be
                  available to SWBT. If Applicant has occupied the space
                  requested before the issuance of a license, a
                  post-installation inspection of Applicant's


                                     PAGE 48
<PAGE>   337


                  facilities may be performed, in place of the field
                  inspection portion of the pre-license survey, to determine
                  whether such facilities are in compliance with the
                  specifications of Article 6 and other provisions of this
                  Agreement. In performing such inspection, SWBT will not,
                  without due cause and justification, repeat pre-occupancy
                  survey work performed by Applicant.

              (b) The administrative processing portion of the pre-license
                  survey (which includes processing the application and
                  reviewing records) will be performed by SWBT.

              (c) Before performing any portion of the pre-license survey,
                  SWBT shall obtain Applicant's written authorization to
                  perform such work. Authorization may be given, when
                  possible, when the application is submitted. No
                  authorization shall be required for post-installation
                  inspections of Applicant's facilities when installation has
                  occurred before the issuance of a license.

                   ARTICLE 10: ISSUANCE AND DENIAL OF LICENSES
                      (INCLUDING FACILITIES MODIFICATIONS,
                    CAPACITY EXPANSIONS, AND MAKE-READY WORK

         10.01 Response Within 45 Days. Within 45 days of Applicant's submission
of a license application pursuant to Section 9.02 of this Agreement, or within
such other period of time as may be mutually agreed upon in writing by the
parties, SWBT shall respond to the application. The response shall state whether
the application is being granted or denied. If denial is anticipated, or if SWBT
personnel involved in the processing of Applicant's request for access become
aware of hazardous substances at the site requested by Applicant, SWBT shall
promptly advise Applicant and shall, at Applicant's request, discuss
alternatives to denial and issues associated with the presence of such hazardous
substances. Additional state-specific response and notice requirements, if any,
shall be addressed by an addendum to this Agreement.

              (a) If access is granted, SWBT shall, no later than 45 days
                  after Applicant's submission of the license application,
                  further advise Applicant in writing (1 ) what facilities
                  modifications, capacity expansions, or make-ready work, if
                  any, will be required to prepare SWBT's pole or conduit
                  facilities, (2) provide Applicant an estimate of charges for
                  such facilities modifications, capacity expansions, or
                  make-ready work and (3) disclose to Applicant any hazardous
                  substances known by SWBT to be present at the site.

              (b) SWBT may take into account issues of capacity, safety, 
                  reliability, and engineering when considering requests for
                  access, provided the assessment of such factors is done in a
                  nondiscriminatory manner. If


                                     PAGE 49
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                  access is denied, SWBT shall confirm the denial in writing
                  by the 45th day after the receipt by SWBT of Applicant's
                  completed application. A denial of access shall be specific,
                  shall include all relevant evidence and information
                  supporting the denial, and shall explain how such evidence
                  and information relates to a denial of access for reasons of
                  lack of capacity, safety, reliability, or generally
                  applicable engineering purposes. If Applicant in its
                  completed application sets forth in writing specific
                  proposals for expanding capacity, the denial statement shall
                  specifically address such proposals.

              (c) Applicant agrees that if, at any time prior to the 45th day,
                  it has determined that it no longer seeks access to specific
                  poles, ducts, or conduit facilities, Applicant shall
                  promptly withdraw or amend its application, thereby
                  minimizing the administrative burdens on SWBT of processing
                  and responding to the application.

              (d) Notwithstanding the 45-day deadline, SWBT will, pursuant to
                  Section 8.03 of this Agreement, make available to Applicant
                  for immediate occupancy any pole, duct, or conduit space
                  which is not currently assigned, not designated as a
                  maintenance duct, and not subject to applicable make-ready
                  requirements.

              (e) If SWBT fails to respond in writing within 30 days of SWBT's
                  documented receipt of a license application pursuant to
                  Section 9.02 of this Agreement, or within such other period
                  of time as may be mutually agreed upon in writing by the
                  parties, Applicant may by written notice inquire whether
                  SWBT intends to deny Applicant's request for access. After
                  such notice has been given and receipt by SWBT of a properly
                  submitted license application has been confirmed, SWBT's
                  failure to respond in writing within 15 days after receipt
                  of the notice shall be deemed to constitute approval of the
                  request for access. In such event, Applicant shall be
                  entitled to occupy the space requested without the formality
                  of a license; provided, however, that nothing contained in
                  this subsection shall authorize Applicant to occupy space
                  already occupied or subject to a prior valid space
                  assignment to SWBT or any third-party; and provided further
                  that nothing in this subsection authorizes Applicant,
                  without first obtaining SWBT's written authorization, to (1)
                  place its facilities on any pole or in any duct or conduit
                  that requires make-ready work (other than third-party
                  make-ready work arranged directly by Applicant) or (2)
                  utilize any infrequent construction technique or
                  connectivity solution described in Section 6.03.

         10.02 Obligation to Construct or Modify Facilities:  Capacity 
Expansions.  SWBT may grant access subject to Applicant's approval of such 
make-ready work (including facilities modifications) as may be required to 
expand capacity to accommodate


                                     PAGE 50
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Applicant's request, in which event Applicant shall either accept such
conditions, initiate good faith negotiations to explore other potential
accommodations, or withdraw its request for access. If SWBT does not offer to
expand capacity and denies Applicant's request for access, SWBT shall promptly
notify Applicant of such determination. SWBT shall not deny Applicant's request
for access on lack of capacity grounds when capacity can be expanded as provided
in this section and in Section 6.03 (infrequent construction techniques and
connectivity solutions).

              (a) At Applicant's request, SWBT will replace, expand, or modify
                  its poles and conduit system, or otherwise expand the
                  capacity of such facilities to accommodate the placement of
                  Applicant's facilities; provided, however, that such
                  modifications shall be consistent with the capacity, safety,
                  reliability, and engineering considerations which SWBT would
                  apply to itself if the work were performed for SWBT's own
                  benefit. Outside plant facilities modifications and capacity
                  expansions contemplated by this subsection include, but are
                  not limited to, installation of inner duct, cable
                  consolidations and the removal of cables that are retired or
                  inactive (dead). Except as otherwise specifically provided
                  in this section, SWBT may recover from Applicant the costs
                  of facilities modifications and capacity expansions to make
                  space available for Applicant's facilities and charges for
                  such modifications and expansions shall be determined and
                  billed as provided in APPENDIX I of this Agreement.

              (b) SWBT will, at its own expense, install inner duct in SWBT's
                  conduit system as necessary to make space available for
                  Applicant's facilities. Inner duct installations to
                  accommodate Applicant's facilities will be performed by SWBT
                  within the same time intervals which would apply if SWBT
                  were performing such installations for itself. If SWBT's
                  intervals for beginning or completing inner duct
                  installation do not meet Applicant's needs, Applicant may
                  arrange for the inner duct installation to be performed by
                  an authorized contractor selected by Applicant from a list,
                  jointly developed and maintained by the parties, of
                  contractors mutually approved as qualified to perform inner
                  duct installations. Applicant may install the inner duct
                  itself if Applicant is on the list of mutually approved
                  contractors at the time the work is performed. When inner
                  duct is installed in SWBT's conduit system by Applicant or
                  an authorized contractor selected by Applicant, SWBT will
                  provide the inner-ducting materials to be installed and
                  Applicant shall bear all other installation expenses.
                  Applicant shall give SWBT sufficient advance notice of the
                  materials needed to enable SWBT to provide such materials to
                  Applicant on a timely basis. Applicant shall return all
                  unused materials, including unused inner duct and reels, to
                  SWBT or purchase them from SWBT. Inner duct installed by
                  Applicant or an authorized contractor selected by Applicant
                  shall be installed in accordance with


                                     PAGE 51
<PAGE>   340


                  SWBT's specifications and in accordance with the same
                  standards and practices which would be followed if the inner
                  duct were being installed by SWBT or SWBT's contractors.
                  Applicant shall indemnify, on request defend, and hold SWBT
                  harmless for any injuries, losses, damages, claims, or
                  liabilities directly resulting from the installation of
                  inner duct by Applicant or any authorized contractor
                  selected by Applicant under this subsection. Applicant shall
                  not, without SWBT's prior written approval, arrange for
                  inner duct installation to be performed by subcontractors
                  who are not authorized contractors.

              (c) SWBT shall, at its expense, remove cables that are retired
                  or inactive (dead) to free-up requested duct and pole space,
                  provided that such removal is reasonably feasible (i.e.,
                  cable pulls easily without incident). If a section of cable
                  is "frozen" in a duct and would require excavation to
                  remove, Applicant may, at its option, request that SWBT
                  excavate the obstruction or, in the alternative, arrange for
                  excavation of the obstruction to be performed by an
                  authorized contractor selected by Applicant from a list,
                  jointly developed and maintained by the parties, of
                  contractors mutually approved as qualified to perform such
                  excavations. Applicant may excavate the obstruction itself
                  if Applicant is on the list of mutually approved contractors
                  at the time the work is performed. Such excavations will be
                  at Applicant's expense. Removal of the remainder of the
                  cable will be at SWBT's expense. Excavation work performed
                  by Applicant or an authorized contractor selected by
                  Applicant shall be performed in accordance with SWBT's
                  specifications and in accordance with the same standards and
                  practices which would be followed if such excavation work
                  were being performed by SWBT or SWBT's contractors. Neither
                  Applicant nor any authorized contractor selected by
                  Applicant to perform excavation work under this subsection
                  shall conduct facility excavation activities in any manner
                  which jeopardizes or degrades the integrity of SWBT's
                  structures or interferes with any existing use of the
                  facilities. Applicant shall indemnify, on request defend,
                  and hold SWBT harmless for any injuries, losses, damages,
                  claims, or liabilities directly resulting from the
                  performance of excavation work by Applicant or any
                  authorized contractor selected by Applicant under this
                  subsection. Applicant shall not, without SWBT's prior
                  written approval, arrange for excavation work to be
                  performed under this subsection by subcontractors who are
                  not qualified contractors.

         10.03 Issuance of Licenses and Immediate Access When No Make-ready Work
is Required. If, on the basis of Applicant's representations or SWBT's field
inspection, if any, SWBT determines that no make-ready work is necessary to
accommodate Applicant's facilities, SWBT will issue a license without performing
make-ready work and pole attachment or conduit occupancy space will be made
available to Applicant for


                                     PAGE 52
<PAGE>   341


immediate occupancy.  Immediate occupancy prior to the issuance of a license 
shall be governed by Section 8.03.

         10.04 Make-ready Work. If SWBT determines that make-ready work will be
necessary to accommodate Applicant's facilities, SWBT shall promptly notify
Applicant of the make-ready work proposed to enable the accommodation of
Applicant's facilities.

              (a) The notice shall be given in writing no later than 45 days
                  after the receipt by SWBT of Applicant's completed
                  application pursuant to Section 9.02 of this Agreement or
                  within such other period of time as may be mutually agreed
                  upon in writing by the parties.

              (b) The notice will include SWBT's estimate of make-ready
                  charges, which estimate shall be stated on SWBT Form SW-9434
                  ("Access Application and Make-Ready Authorization"), a copy
                  of which is attached hereto as part of APPENDIX III.

              (c) Applicant shall have 20 days (the "acceptance period") after
                  receiving SWBT's estimate of make-ready charges to authorize
                  completion of the make-ready work proposed by SWBT or to
                  advise SWBT of its willingness to perform the proposed
                  make-ready work itself. If Applicant advises SWBT that it is
                  willing to perform the make-ready work proposed by SWBT in
                  accordance with SWBT's plans and specifications, SWBT will
                  not, without due cause and justification, refuse to accept
                  Applicant's offer to perform the work. Authorization shall
                  be accomplished by Applicant's signing the estimate and
                  returning it to SWBT within the 20-day acceptance period.

              (d) Within the 20-day acceptance period, the parties may
                  negotiate modifications of the make-ready work to be
                  performed. If the parties reach agreement through
                  negotiation, a new estimate shall be prepared and
                  authorization shall be accomplished by Applicant's signing
                  the revised estimate and returning it to SWBT within the
                  original 20-day acceptance period, or within such period of
                  time as may be mutually agreed upon by the parties.

              (e) If Applicant does not sign and return the estimate within
                  the 20-day acceptance period, or within such other period of
                  time as may be mutually agreed upon in writing by the
                  parties, Applicant shall notify SWBT in writing by the 20th
                  day whether Applicant is withdrawing its application,
                  electing to perform the make-ready work itself as provided
                  in subsection (c) or electing to treat SWBT's make-ready
                  requirements as a denial of access.


                                     PAGE 53
<PAGE>   342
                    (1)  If no such notice is given by the 20th day, or such
                         later date as may be mutually agreed upon by the
                         parties, SWBT shall contact Applicant to determine
                         whether Applicant intends to withdraw its application.
                         Applicant shall be deemed to have withdrawn its
                         application if, in response to SWBT's inquiry,
                         Applicant does not immediately sign and return the
                         estimate to SWBT.

                    (2)  If Applicant timely notifies SWBT that it is electing
                         to treat SWBT's make-ready requirements as a denial of
                         access, SWBT shall, within 20 days after receiving the
                         notice, provide Applicant with a written statement
                         explaining its decision to grant access only if the
                         specified make-ready work is performed. The statement
                         shall be specific, shall include all relevant evidence
                         and information supporting SWBT's decision to grant
                         access only if the specified make-ready work is
                         performed, and shall explain how such evidence and
                         information relates to SWBT's decision for reasons of
                         lack of capacity, safety, reliability, or generally
                         applicable engineering purposes. The statement shall
                         also set forth the basis for SWBT's make-ready
                         proposals and specifically address SWBT's rationale for
                         rejecting Applicant's alternative written proposals, if
                         any.

         10.05 Performance of Make-ready Work. Except as otherwise specifically
provided in Section 10.02 and in this section, make-ready work shall be
performed by SWBT or by contractors, subcontractors, or other persons acting on
SWBT's behalf and shall be performed by SWBT in accordance with the same time
intervals which would be applicable if SWBT were performing the work for itself

          (a)  Applicant and SWBT will mutually establish and maintain for each
               SWBT construction district lists of authorized contractors which
               may be selected by Applicant to perform make-ready work when
               SWBT's interval for beginning or completing such make-ready work
               does not meet Applicant's needs. At Applicant's request,
               Applicant will be included on such lists upon Applicant's
               demonstrating that (1) its personnel are qualified to perform
               such work in accordance with SWBT's specifications and (2)
               Applicant meets the financial responsibility (insurance and
               bonding) requirements generally applicable to contractors,
               subcontractors, and other vendors performing the same or similar
               work on SWBT's behalf or the self-insurance requirements of
               Section 23.02.

          (b)  If SWBT's interval for beginning or completing make-ready work
               does not meet Applicant's needs, Applicant may (1) perform the
               make-ready work itself, if Applicant is on the applicable list of
               authorized contractors at the time the work is to be performed or
               (2) arrange for the work to be performed by an authorized
               contractor selected by Applicant 

                                   PAGE 54
<PAGE>   343


               from the applicable list of authorized contractors. Subject to
               the availability of personnel, Applicant may also request that
               SWBT perform the work on an expedited basis; provided, however,
               that make-ready work will not be performed on an expedited basis
               unless Applicant first approves any overtime or premium rates or
               charges associated with performance of the work on an expedited
               basis.

          (c)  From time to time, additional contractors, subcontractors or
               other vendors may be jointly approved by Applicant and SWBT to
               perform specific make-ready work in the event that the work load
               exceeds the capacity of the authorized contractors on the
               approved list to perform the make-ready work in a timely manner.

          (d)  Make-ready work performed by Applicant, by an authorized
               contractor selected by Applicant, or by a contractor,
               subcontractor, or other vendor jointly approved by the parties
               under subsection (c) shall be performed in accordance with SWBT's
               specifications and in accordance with the same standards and
               practices which would be followed if such excavation work were
               being performed by SWBT or SWBT's contractors. Neither Applicant
               nor authorized contractors selected by Applicant to perform
               make-ready work under this section shall conduct such work in any
               manner which jeopardizes or degrades the integrity of SWBT's
               structures or interferes with any existing use of SWBT's
               facilities. Applicant and any authorized contractor selected by
               Applicant to perform make-ready work shall indemnify, on request
               defend, and hold SWBT harmless from any and all injuries, losses,
               damages, claims, or liabilities directly resulting from their
               activities under this section.

          (e)  Nothing contained in this section authorizes Applicant, any
               authorized contractor selected by Applicant, or any other person
               acting on Applicant's behalf to consolidate SWBT's cables.

         10.06 Multiple Applications. Applications shall be processed on a
first-come, first-served basis. Applications filed on the same date shall be
treated as having been filed simultaneously and shall be processed accordingly.

         10.07 Payments to Others for Expenses Incurred in Transferring or
Arranging Their Facilities. Applicant shall make arrangements with the owners of
other facilities attached to SWBT's poles or occupying space in SWBT's conduit
system regarding reimbursement for any expenses incurred by them in transferring
or rearranging their facilities to accommodate the attachment or placement of
Applicant's facilities to or in SWBT's poles, ducts, and conduits.

         10.08 Reimbursement for the Creation or Use of Additional Capacity. As
a result of facilities modification, capacity expansion, or other make-ready
work performed to

                                   PAGE 55

<PAGE>   344

accommodate Applicant's facilities, additional capacity may
become available on SWBT's poles or in its conduit system. In such event,
Applicant shall not have a preferential right to utilize such additional
capacity in the future and shall not be entitled to any pole attachment or
conduit occupancy fees subsequently paid to SWBT for the use of such additional
capacity. SWBT shall, however, establish procedures for giving Applicant notice
of the subsequent use by SWBT or third parties of additional space or capacity
created at Applicant's expense. If SWBT utilizes additional space or capacity
created at Applicant's expense, SWBT will reimburse Applicant on a pro-rata
basis for SWBT's share, if any, of Applicant's capacity expansion costs, to the
extent reimbursement is required by the Pole Attachment Act and applicable
rules, regulations, and commission orders. If any third party later utilizes any
such additional space or capacity, SWBT shall, at the request of Applicant or
such third party, provide such information as may be available to SWBT to assist
Applicant and such third party in determining the amount, if any, which such
third party may owe Applicant as its pro-rata share of Applicant's capacity
expansion costs. Nothing contained in this section shall be construed as
conferring or imposing on SWBT any right or duty to determine the amounts owing
by a third party to Applicant, to collect or remit any such amounts to
Applicant, to resolve or adjudicate disputes over reimbursement between
Applicant and third parties, to deny a third party access to SWBT's poles,
ducts, conduits, or rights-of-way due to such third party's failure to satisfy
Applicant's reimbursement demands, or to take any other action to enforce
Applicant's reimbursement rights against any third party. In like manner, for
additional capacity created by SWBT from and after the date of enactment of the
Telecommunications Act of 1996, SWBT shall be entitled to recover from Applicant
and third parties, to the full extent permitted by law, their pro-rata shares of
such capacity expansion costs incurred by SWBT. To the extent that either party
seeks to avail itself of this cost-saving mechanism, such party shall be
responsible for maintaining adequate records documenting the costs subject to
reimbursement, including but not limited to costs incurred for facilities
modification and capacity expansion work performed directly by such party or
contractors performing work on such party's behalf.

         10.09 License and Attachment. After all required make-ready work is
completed, SWBT will issue a license confirming that Applicant may attach
specified facilities to SWBT's poles or place specified facilities in SWBT's
conduit system. Applicant shall have access to attach or place only those
facilities specifically described in licenses subject to this Agreement, and no
others, except as otherwise specifically provided in (a) Sections 8.03 and 12.03
or other provisions of this Agreement, (b) any other written agreement between
the parties providing for such access, or (c) the provisions of any applicable
tariffs or commission orders.

               ARTICLE 11: CONSTRUCTION OF APPLICANT'S FACILITIES

         11.01 Responsibility for Attaching and Placing Facilities. Each party
shall be responsible for the actual attachment of its own facilities to SWBT's
poles and the placement of such facilities in SWBT's ducts, conduits, and
rights-of-way and shall be solely responsible for all costs and expenses
incurred by it or on its behalf in connection 

                                   PAGE 56

<PAGE>   345

with such activities. In this regard, each party and its contractors shall be
solely responsible for (a) paying all persons and entities who provide
materials, labor, access to real or personal property, or other goods or
services in connection with the construction and attachment of its facilities
and (b) directing the activities of all personnel acting on such party's behalf
while they are physically present on, within, or in the vicinity of SWBT's
poles, ducts, conduits, and rights-of-way.

         11.02 Construction Schedule. After the issuance of a license, Applicant
shall provide SWBT with an updated construction schedule and thereafter keep
SWBT informed of anticipated changes in the construction schedule. Construction
schedules received by SWBT shall be subject to the provisions of Article 28 of
this Agreement (Confidentiality of Information). Construction schedules required
by this section shall include, at a minimum, the following information:

               (a)  the name, title, business address, and business telephone
                    number of the manager responsible for construction of the
                    facilities;

               (b)  the names of each contractor and subcontractor which will be
                    involved in the construction activities;

               (c)  the estimated dates when construction will begin and end;
                    and

               (d)  the approximate dates when Applicant or personnel working on
                    Applicant's behalf will be performing construction work in
                    connection with the attachment of Applicant's facilities to
                    SWBT's poles or the placement of Applicant's facilities in
                    any part of SWBT's conduit system.

                     ARTICLE 12: USE AND ROUTINE MAINTENANCE
                            OF APPLICANT'S FACILITIES

         12.01 Use of Applicant's Facilities. Each license subject to this
Agreement authorizes Applicant to have access to Applicant's facilities on or
within SWBT's poles, ducts, and conduits as needed for the purpose of serving
Applicant's customers.

         12.02 Routine Maintenance of Applicant's Facilities. Each license
subject to this Agreement authorizes Applicant to engage in routine maintenance
of facilities located on or within SWBT's poles, ducts, and conduits. Routine
maintenance does not include the replacement or modification of Applicant's
facilities in any manner which results in Applicant's facilities differing
substantially in size, weight, or physical characteristics from the facilities
described in Applicant's license.

         12.03 Installation of Drive Rings and J-Hooks. Applicant may install
drive rings and J-hooks on SWBT's poles for the attachment of drop wires as
specified in this section.


                                   PAGE 57
<PAGE>   346

               (a)  Drive rings and J-hooks may be installed as specified in
                    pole attachment licenses issued to Applicant.

               (b)  If attachment space has already been licensed to Applicant
                    on a given SWBT pole, Applicant may install drive rings and
                    J-hooks within the space assigned to Applicant (typically
                    six inches above and six inches below Applicant's point of
                    attachment on the pole if the point of attachment is in the
                    center of the space assigned to Applicant) without applying
                    for or obtaining a new or amended license. No additional
                    attachment charges shall apply with respect to drive rings
                    and J-hooks installed in Applicant's licensed attachment
                    space.

               (c)  Applicant's first choice for placement of drive rings and
                    J-hooks shall be the licensed attachment space assigned to
                    Applicant as provided in subsection (b) above; provided,
                    however, that if attachment space already licensed to
                    Applicant on a given SWBT pole is not adequate for
                    Applicant's drive rings or J-hooks, Applicant may, when
                    necessary, and without applying for or obtaining a new or
                    amended license, install such drive rings and J-hooks above
                    or below Applicant's licensed attachment space as described
                    in subsection (b) above. No additional attachment charges
                    shall apply with respect to drive rings and J-hooks
                    installed outside Applicant's licensed attachment space as
                    permitted in this subsection.

               (d)  If Applicant has not already been licensed attachment space
                    on a given SWBT pole, Applicant may, when necessary, install
                    drive rings and J-hooks to unassigned space on such pole
                    without first obtaining a license for such attachment and
                    shall, promptly following such installation, notify SWBT of
                    the attachment. Such notification shall be made on a form to
                    be developed by SWBT for this purpose and shall constitute
                    an application for a license. Such application may be
                    conditionally granted without a pre-license survey or other
                    inquiry by SWBT, and SWBT shall not be required to process
                    the application, log the attachment as an assignment in its
                    outside plant records, or issue a permanent license for the
                    attachment unless specifically requested by Applicant to do
                    so; provided, however, that a conditionally granted
                    application under this subsection shall be subject to
                    revocation if it is subsequently determined that such
                    attachment has been made in violation of subsection (e) of
                    this section or other provisions of this Agreement.
                    Drive-rings and J-hooks installed pursuant to this
                    subsection are pole attachments and charges for such
                    attachments shall be determined in accordance with the Pole
                    Attachment Act and applicable rules, regulations, and
                    commission orders.





                                   PAGE 58
<PAGE>   347

               (e)  Notwithstanding the provisions of subsections (c)-(d) above,
                    Applicant may not install drive rings and J-hooks in space
                    assigned to SWBT or another joint user without the approval
                    of SWBT or such other joint user and may not install drive
                    rings and J-hooks in unassigned space in any manner which
                    will block or preclude the subsequent occupancy or use of
                    space by SWBT or other joint users. If the presence of
                    Applicant's facilities in space not assigned to Applicant
                    will block or preclude the use of assigned or otherwise
                    assignable space by SWBT or other joint users, Applicant
                    shall, on SWBT's request, promptly relocate the facilities
                    in order to accommodate the facilities of other users and
                    shall bear all expenses associated with such relocation.

               (f)  SWBT may not install drive rings of J-hooks in space
                    assigned to Applicant without Applicant's approval and
                    shall, at Applicant's request, and at SWBT's expense,
                    promptly relocate or, if necessary, remove, any drive rings
                    or J-hooks installed in violation of this subsection. If
                    SWBT drive rings or J-hooks have been installed in space
                    subsequently assigned to Applicant, or if the presence of
                    SWBT drive rings or J-hooks blocks or precludes the use of
                    otherwise assignable space on SWBT's poles, SWBT shall, at
                    Applicant's request, relocate such facilities, if it is
                    feasible to do so, as make-ready work.

               (g)  Applicant shall, at the request of SWBT or another joint
                    user, at Applicant's expense, promptly relocate or, if
                    necessary, remove any drive rings and J-hooks placed on
                    SWBT's poles other than as permitted in this section.

         12.04 Short-term Use of Maintenance Ducts for Repair and Maintenance
Activities. Maintenance ducts shall be available, on a nondiscriminatory basis,
for short-term (not to exceed 30 days) non-emergency maintenance or repair
activities by any person or entity (including but not limited to SWBT,
Applicant, other local service providers, and other joint users) with facilities
in the conduit section in which the maintenance duct is located; provided,
however, that use of the maintenance duct for non-emergency maintenance and
repair activities must be scheduled by SWBT. A person or entity using the
maintenance duct for non-emergency maintenance or repair activities shall
immediately notify SWBT of such use and must either vacate the maintenance duct
within 30 days or, with SWBT's consent, which consent shall not be unreasonably
withheld, rearrange its facilities to ensure that at least one full-sized
replacement maintenance duct, (or, if the designated maintenance duct was an
inner duct, a suitable replacement inner duct) is available for use by all
occupants in the conduit section within 30 days after such person or entity
occupies the maintenance duct. Cables temporarily placed in the maintenance duct
on a non-emergency basis shall be subject to such accommodations as may be
necessary to rectify emergencies which may occur while the maintenance duct is
occupied.


                                   PAGE 59
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         12.05 Responsibility for Maintenance of Facilities. Each party shall be
solely responsible for maintaining its own facilities and (a) paying all persons
and entities who provide materials, labor, access to real or personal property,
or other goods or services in connection with the maintenance of such party's
facilities and (b) directing the activities of all such personnel while they are
physically present on, within, or in the vicinity of SWBT's poles, ducts,
conduits, and rights-of-way.

         12.06 Information Concerning the Maintenance of Applicant's Facilities.
Promptly after the issuance of a license, Applicant shall provide SWBT with the
name, title, business address, and business telephone number of the manager
responsible for routine maintenance of Applicant's facilities and shall
thereafter notify SWBT of changes to such information. The manager responsible
for routine maintenance of Applicant's facilities shall, on SWBT's request,
identify any contractor, subcontractor, or other person performing maintenance
activities on Applicant's behalf at a specified site.

               ARTICLE 13: MODIFICATION OF APPLICANT'S FACILITIES

         13.01 Notification of Planned Modifications. Applicant shall notify
SWBT in writing at least 30 days before adding to, relocating, replacing or
otherwise modifying its facilities already attached to a SWBT pole or located in
any SWBT duct or conduit. The notice shall contain sufficient information to
enable SWBT to determine whether the proposed addition, relocation, replacement,
or modification is within the scope of Applicant's present license or requires a
new or amended license. No notice shall be required for such routine
modifications as the installation or placement of drive rings or J-hooks,
terminals, and other ancillary apparatus routinely used in providing service to
customers, having no effect on the structural integrity of SWBT's poles, ducts,
or conduits, and having no effect on the ability of SWBT or joint users to use
or have access to SWBT's poles, ducts, conduits, or rights-of-way.

         13.02 New or Amended License Required. A new or amended license will be
required if the proposed addition, relocation, replacement, or modification:

               (a)  requires that Applicant occupy additional space on SWBT's
                    poles (except on a temporary basis in the event of an
                    emergency);

               (b)  requires that Applicant occupy additional space (other than
                    space in the maintenance duct in accordance with Sections
                    12.04, 13.03, and 15.02 of this Agreement) in any SWBT duct
                    or conduit except on a temporary basis in the event of an
                    emergency;

               (c)  results in the facilities attached to SWBT's poles or placed
                    in SWBT's ducts or conduits being different from those
                    described in Applicant's current license (e.g., different
                    duct or size increase causing a need to recalculate storm
                    loadings, guying, or pole class); or

                                   PAGE 60
<PAGE>   349


               (d)  requires additional holding capacity on a permanent basis.

         13.03 Use of Maintenance Duct in Connection with Facility Modifications
and Replacements. Non-emergency access to the maintenance duct in connection
with facilities modifications and replacements shall be subject to the
provisions of Section 12.04 of this Agreement.

         13.04 Replacement of Facilities and Spinning/Overlashing Additional
Cables. Applicant may replace existing facilities with new facilities occupying
the same pole, duct, or conduit space, and may spin or overlash additional
cables to its own existing facilities; provided, however, that such activities
shall not be considered to be routine maintenance and shall be subject to the
requirements of this article.

         13.05 Streamlined Procedures for the Issuance of Amended Licenses. SWBT
may streamline procedures for the issuance of amended licenses with respect to
proposed additions, relocations, replacements, or modifications of Applicant's
facilities when it appears to SWBT that the proposed additions, relocations,
replacements, or modifications will not require make-ready work by SWBT, will
not interfere with SWBT's use of its poles, conduit systems, or facilities
attached or connected thereto or contained therein, and will not interfere with
the use of existing facilities attached or connected thereto or contained
therein by joint users.

                       ARTICLE 14: REQUIRED REARRANGEMENTS
                            OF APPLICANT'S FACILITIES

         14.01 Notice of Planned Modifications. The parties acknowledge that the
Pole Attachment Act recites in part that "Whenever the owner of a pole, duct,
conduit, or right-of-way intends to modify or alter such pole, duct, conduit, or
right-of-way, the owner shall provide written notification of such action to any
entity that has obtained an attachment to such conduit or right-of-way so that
such entity may have a reasonable opportunity to add to or modify its existing
attachment." The parties further acknowledge that the FCC, in the First
Interconnection Order in CC Docket No. 96-98, recites that "... absent a private
agreement establishing notification procedures, written notification of a
modification must be provided to parties holding attachments on the facility to
be modified at least 60 days prior to the commencement of the physical
modification itself." This article is intended by the parties to alter the
above-described notification requirements only as provided in Section 14.02(b)
below.

         14.02 Required Rearrangement of Applicant's Facilities. Applicant
acknowledges that, from time to time, it may be necessary or desirable for SWBT
to rearrange facilities on or within its poles or conduit systems, change out
poles, add poles to a pole line, relocate or reconstruct poles, pole lines,
conduit segments, or conduit runs, enlarge manholes, reinforce conduit, or
otherwise modify poles, pole lines, or portions of its conduit system and that
such changes may be necessitated by SWBT's own business needs or by factors
outside of SWBT's control, such as the decision by a municipality to 

                                   PAGE 61
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widen streets or the decision by a third party to seek access to SWBT's poles,
ducts, conduits, or rights-of-way.

               (a)  Applicant agrees that Applicant will cooperate with SWBT and
                    joint users in making such rearrangements as may be
                    necessary to enable such changes to be made and that costs
                    incurred by Applicant in making such rearrangements shall,
                    in the absence of a specific agreement to the contrary, be
                    borne by the parties in accordance with then applicable
                    statutes, rules, regulations, and commission orders,
                    including the Pole Attachment Act, rules, regulations, and
                    commission orders thereunder.

               (b)  Whenever feasible, SWBT shall give Applicant not less than
                    60 days prior written notice of the need for Applicant to
                    rearrange its facilities pursuant to this section. The
                    notice shall state the date by which such rearrangements are
                    to be completed. Applicant shall complete such
                    rearrangements within the time prescribed in the notice.
                    SWBT may request that such modification be made within a
                    shorter period of time, in which event Applicant shall not
                    refuse to comply such request without due cause and
                    justification. In determining due cause and justification,
                    the following factors, among others, may be considered:

                    (1)  the circumstances under which the rearrangements are
                         sought (e.g., street-widening project, request by a
                         competing provider for access);

                    (2)  the timeliness of SWBT's request to Applicant;

                    (3)  the nature and number of rearrangements sought;

                    (4)  the impact on the ability of the parties and joint
                         users to meet customer service needs; and

                    (5)  risks of service interruption to customers of the
                         parties and joint users.

               (c)  Nothing contained in this article shall preclude Applicant
                    from advising SWBT, within 60 days from the date of the
                    notice, of its desire to add to or modify its existing
                    attachment.

               ARTICLE 15: EMERGENCY REPAIRS AND POLE REPLACEMENTS

         15.01 Applicability. The parties acknowledge that in the event of an
emergency, services provided by the parties and joint users to their respective
customers may be interrupted, that it may not be possible for all service
providers with facilities attached to SWBT's poles or placed in SWBT's ducts,
conduits, or rights-of-way to restore service to all customers at the same time,
that disputes may arise between the parties concerning the 

                                   PAGE 62
<PAGE>   351


manner in which emergency repairs shall be made, that it is essential that
decisions be made quickly, and that it is highly desirable that all service
providers utilizing SWBT's poles, ducts, conduits, and rights-of-way enter into
appropriate arrangements relating to emergency repairs and service restoration.
In the absence of prearranged agreements, it is expected that disputes will be
immediately resolved at the site by the affected parties present based upon the
criteria set forth in Section 15.05 of this Agreement. The provisions of this
article shall apply in the absence of more comprehensive agreements relating to
emergency repairs.

         15.02 Responsibility for Emergency Repairs; Access to Maintenance Duct.
In general, each party shall be responsible for making emergency repairs to its
own facilities and for formulating appropriate plans and practices enabling such
party to make such repairs.

               (a)  Nothing contained in this Agreement shall be construed as
                    requiring either party to perform any repair or service
                    restoration work of any kind with respect to the other
                    party's facilities or the facilities of joint users.

               (b)  Maintenance ducts shall be available, on a nondiscriminatory
                    basis, for emergency repair activities by any person or
                    entity (including but not limited to SWBT, Applicant, other
                    local service providers, and other joint users) with
                    facilities in the conduit section in which the maintenance
                    duct is located; provided, however, that a person or entity
                    using the maintenance duct for emergency repair activities
                    shall immediately notify SWBT of such use and must either
                    vacate the maintenance duct within 30 days or, with SWBT's
                    consent, which consent shall not be unreasonably withheld,
                    rearrange its facilities to ensure that at least one
                    full-sized replacement maintenance duct (or, if the
                    designated maintenance duct was an inner duct, a suitable
                    replacement inner duct) is available for use by all
                    occupants in the conduit section within 30 days after such
                    person or entity occupies the maintenance duct. The parties
                    agree not to exceed 30 days' use except in unusual
                    emergencies that may require longer than 30 days to rectify.

               (c)  If necessary, other unoccupied ducts or inner ducts may be
                    used on a short-term basis when the maintenance duct is
                    unavailable. Any such use shall be subject to the same rules
                    applicable to the maintenance duct and shall be subject to
                    the rights of any party or joint user to whom such duct or
                    inner duct has been assigned.

         15.03 Designation of Emergency Repair Coordinators and Other
Information. For each SWBT construction district, Applicant shall provide SWBT
with the emergency contact number of Applicant's designated point of contact for
coordinating the handling of emergency repairs of Applicant's facilities and
shall thereafter notify SWBT of changes to such information.

                                   PAGE 63
<PAGE>   352

         15.04 Reporting of Conditions Requiring Emergency Repairs. As a
courtesy, each party shall endeavor to notify the other party at the earliest
practicable opportunity after discovering any condition on or in any of SWBT's
poles, ducts, conduits, or rights-of-way requiring emergency repairs to the
other party's facilities.

         15.05 Order of Precedence of Work Operations: Access to Maintenance
Duct and Other Unoccupied Ducts in Emergency Situations. When notice and
coordination are practicable, SWBT, Applicant, and other affected parties shall
coordinate repair and other work operations in emergency situations involving
service disruptions. Disputes will be immediately resolved at the site by the
affected parties present in accordance with the following principles.

               (a)  Emergency service restoration work requirements shall take
                    precedence over other work operations.

               (b)  Except as otherwise agreed upon by the parties, restoration
                    of lines for emergency services providers (e.g., 911, fire,
                    police, and hospital lines) shall be given the highest
                    priority and temporary occupancy of the maintenance duct
                    (and, if necessary, other unoccupied ducts) shall be
                    assigned in a manner consistent with this priority.
                    Secondary priority shall be given to restoring services to
                    the local service providers with the greatest numbers of
                    local lines out of service due to the emergency being
                    rectified. The parties shall exercise good faith in
                    assigning priorities, shall base their decisions on the best
                    information then available to them at the site in question,
                    and may, by mutual agreement at the site, take other factors
                    into consideration in assigning priorities and sequencing
                    service restoration activities.

               (c)  SWBT shall determine the order of precedence of work
                    operations and assignment of duct space in the maintenance
                    duct (and other unoccupied ducts) only if the affected
                    parties present are unable to reach prompt agreement;
                    provided, however, that these decisions shall be made by
                    SWBT on a nondiscriminatory basis in accordance with the
                    principles set forth in this section.

         15.06 Unilateral Corrective Action. When either party reasonably
believes that, due to the condition of the other party's facilities placed on,
within, or in the vicinity of SWBT's poles, ducts, conduits, or rights-of-way,
there is an immediate or imminent threat to the safety or health of employees or
any other person, to the physical integrity or functioning of either party, or
either party's ability to meet its service obligations, either party may
unilaterally perform such limited corrective work as may be necessary to prevent
or mitigate against the injury threatened. For example, if facilities of the
other party have become detached or partially 

                                   PAGE 64
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detached from a pole, or detached or partially detached from supporting racks or
wall supports within a manhole, either party may reattach them as provided in
this section but shall not be obligated to do so.

               (a)  Before performing any corrective work involving facilities
                    of the other party, SWBT or Applicant shall first attempt to
                    notify the other party. After such notice has been given,
                    the parties shall coordinate corrective work.

               (b)  When an emergency situation exists such that advance notice
                    and coordination are not practicable, either party may
                    perform corrective work without first giving notice to the
                    other party and shall promptly notify the other party of the
                    corrective work performed and the reason why notice was not
                    given.

         15.07 Emergency Pole Replacements. Applicant will cooperate fully with
SWBT when emergency pole replacements are required.

               (a)  When emergency pole replacements are required, SWBT shall
                    promptly make a good faith effort to contact Applicant to
                    notify Applicant of the emergency and to determine whether
                    Applicant will respond to the emergency in a timely manner.

               (b)  If notified by SWBT that an emergency exists which will
                    require the replacement of a pole, Applicant shall transfer
                    its facilities immediately, provided such transfer is
                    necessary to rectify the emergency. If the transfer is to a
                    SWBT replacement pole, the transfer shall be in accordance
                    with SWBT's placement instructions.

               (c)  If Applicant is unable to respond to the emergency situation
                    immediately, Applicant shall so advise SWBT and thereby
                    authorize SWBT (or any joint user sharing the pole with
                    SWBT) to perform such emergency-necessitated transfers (and
                    associated facilities rearrangements) on Applicant's behalf.

         15.08 Expenses Associated with Emergency Repairs. Each party shall bear
all reasonable expenses arising out of or in connection with emergency repairs
of its own facilities and transfers or rearrangements of such facilities
associated with emergency pole replacements made in accordance with the
provisions of this article.

               (a)  Each party shall be solely responsible for paying all
                    persons and entities who provide materials, labor, access to
                    real or personal property, or other goods or services in
                    connection with any such repair, transfer, or rearrangement
                    of such party's facilities.

                                   PAGE 65
<PAGE>   354

               (b)  Applicant shall reimburse SWBT for the costs incurred by
                    SWBT for work performed by SWBT on Applicant's behalf in
                    accordance with the provisions of this article; provided,
                    however, that when the costs incurred by SWBT are for work
                    performed in part for Applicant and in part for SWBT and
                    third parties, Applicant shall only reimburse SWBT for
                    Applicant's pro-rata share of the costs.

            ARTICLE 16: INSPECTION BY SWBT OF APPLICANT'S FACILITIES

         16.01 SWBT's Right to Make Periodic or Spot Inspections. SWBT shall
have the right, but not the duty, to make periodic or spot inspections at any
time of any or all facilities attached to SWBT's poles or placed within SWBT's
poles, ducts, conduits, or rights-of-way. Inspections of Applicant's facilities
may be conducted for the purpose of determining whether facilities attached to
SWBT's poles or placed in SWBT's conduit system are in compliance with the terms
of this Agreement and conform to licenses subject to this Agreement. Charges for
inspections shall be allocated among all parties benefiting from the inspection
in accordance with the Pole Attachment Act and applicable rules, regulations,
and commission orders. When an inspection is conducted for the specific purpose
of auditing or investigating Applicant's compliance with this Agreement, SWBT
may charge Applicant for inspection expenses only if the inspection reflects
that Applicant is in substantial noncompliance with the terms of this Agreement.
If the inspection reflects that Applicant's facilities are not in compliance
with the terms of this Agreement, Applicant shall bring its facilities into
compliance promptly after being notified of such noncompliance and shall notify
SWBT in writing when the facilities have been brought into compliance.

         16.02 Report of Inspection Results. SWBT will provide Applicant the
results of any inspection of Applicant's facilities performed under Section
16.01 of this Agreement.

         16.03 Post-installation Inspections. This article does not apply to
post-installation inspections performed as part of a pre-license survey in those
cases when Applicant has occupied space on or in SWBT's poles, ducts, conduits,
or rights-of-way prior to the issuance of a license pursuant to Section 8.03 of
this Agreement.

                      ARTICLE 17: TAGGING OF FACILITIES AND
                            UNAUTHORIZED ATTACHMENTS

         17.01 Facilities to Be Marked. Applicant shall tag or otherwise mark
all of Applicant's facilities placed on or in SWBT's poles, ducts, conduits, and
rights-of-way in a manner sufficient to identify the facilities as Applicant's
facilities.

         17.02 Removal of Untagged Facilities. Subject to the provisions of
subsections (a)-(d) of this section, SWBT may, without notice to any person or
entity, remove from SWBT's poles or any part of SWBT's conduit system any
untagged or unmarked facilities, including any such facilities owned or used by
Applicant, if SWBT determines

                                   PAGE 66
<PAGE>   355

that such facilities are not the subject of a current license authorizing their
continued attachment to SWBT's poles or occupancy of SWBT's conduit system and
are not otherwise lawfully present on SWBT's poles or in SWBT's conduit system.

               (a)  Before removing any such untagged or unmarked facilities,
                    SWBT shall first attempt to determine whether the facilities
                    are being used by Applicant or any other firm, are
                    authorized by any license subject to this Agreement, or are
                    otherwise lawfully present on SWBT's poles or in SWBT's
                    conduit system.

               (b)  SWBT shall not remove untagged or unmarked facilities which
                    are thought to be operational without first making
                    reasonable efforts to (1) determine the identity of the
                    owner or other person or entity thought to be responsible
                    for the facilities and (2) give advance written notice to
                    such person or entity.

               (c)  If the facilities appear to be facilities of Applicant
                    described in a current license or application subject to
                    this Agreement, SWBT shall give written notice to Applicant
                    requesting Applicant to tag or mark the facilities within 60
                    days and Applicant shall either tag the facilities within
                    the 60-day period, advise SWBT in writing of its schedule
                    for tagging the facilities, or notify SWBT in writing that
                    it disclaims ownership of or responsibility for the
                    facilities. If Applicant disclaims ownership of or
                    responsibility for the facilities, Applicant shall disclose
                    to SWBT the identity of the owner or other person or entity,
                    if any, thought by Applicant to be responsible for the
                    facilities.

               (d)  If the facilities appear to be facilities used by Applicant
                    but not subject to a current license granted under this
                    Agreement, the provisions of Sections 17.05-17.12 shall
                    apply.

         17.03 Verification That Presently Attached Facilities Are Subject to
Existing Licenses. Applicant warrants and represents that, to the best of its
information and belief, all facilities presently owned or used by Applicant and
attached to SWBT's poles or occupying space within any part of SWBT's conduit
system in this State have been disclosed to SWBT and are subject to current
licenses or are otherwise lawfully present on or in SWBT's poles, ducts, and
conduits. If Applicant determines that any such facilities are not the subject
of current licenses, Applicant shall so advise SWBT and promptly apply for
licenses for such facilities or remove the facilities from SWBT's poles or
conduits. Nothing contained in this section shall be construed as requiring
Applicant to make a field audit of its existing facilities to confirm the
licensing status of its facilities as a prerequisite to entering into this
Agreement.

         17.04 Updating of Plant Location Records. Applicant shall furnish SWBT,
upon request, with such information as may from time to time be necessary for
SWBT to 

                                   PAGE 67
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correct and update SWBT's pole and conduit maps and records, cable plat maps,
and other plant location records recording or logging assignments of pole, duct,
and conduit space.

         17.05 Notice to Applicant. If any of Applicant's facilities for which
no license is presently in effect are found attached to SWBT's poles or anchors
or within any part of SWBT's conduit system, SWBT, without prejudice to other
rights or remedies available to SWBT under this Agreement, and without prejudice
to any rights or remedies which may exist independent of this Agreement, shall
send a written notice to Applicant advising Applicant that no license is
presently in effect with respect to the facilities and that Applicant must,
within 60 days, respond to the notice as provided in Section 17.06 of this
Agreement.

         17.06 Applicant's Response. Within 60 days after receiving a notice
under Section 17.05 of this Agreement, Applicant shall acknowledge receipt of
the notice and submit to SWBT, in writing, either:

               (a)  a denial or disclaimer of ownership or other interest in the
                    facilities, together with an explanation of the factual and
                    claimed legal basis for such denial or disclaimer;

               (b)  a statement that the facilities are the subject of a current
                    license, together with an explanation of the factual and
                    claimed legal basis for Applicant's assertion that the
                    facilities are currently licensed, or a statement that no
                    license is required, and an explanation of the factual and
                    claimed legal basis for that assertion; or

               (c)  an application for a new or amended license with respect to
                    such facilities, together with a full and complete
                    explanation of the circumstances under which such facilities
                    were attached to, placed within, or allowed to remain on or
                    in SWBT's poles or any part of SWBT's conduit system. Such
                    explanation shall include, at a minimum, the following:

                    (1)  the date (or estimated date) when such facilities were
                         attached to SWBT's poles or placed in SWBT's conduit
                         system, and the factual basis supporting Applicant's
                         selection of such date (or estimated date); and

                    (2)  the factual basis for Applicant's assertion, if any,
                         that decisions to attach, place or allow the facilities
                         to remain on or in SWBT's poles or conduit system were
                         made in good faith and without intent to circumvent
                         SWBT's pole attachment or conduit occupancy licensing
                         requirements.

                                   PAGE 68
<PAGE>   357

         17.07 Denial or Disclaimer of Ownership or Other Interest. Applicant's
submission to SWBT of a denial or disclaimer of ownership or other interest in
the facilities shall constitute Applicant's waiver of any objection Applicant
may have to SWBT's removal of the facilities. Submission of such a denial or
disclaimer shall not be construed as an agreement by Applicant to pay any
charges associated with removal of the facilities and shall be deemed to be a
denial of any such responsibility; provided, however, that nothing contained in
this section shall prohibit SWBT from invoking the dispute resolution process or
filing suit, in a court of competent jurisdiction, to establish that Applicant
is liable to SWBT for the costs of removal notwithstanding its denial or
disclaimer.

         17.08 Review by SWBT of Licensing Status. Within 15 business days after
receiving Applicant's statement that the facilities are the subject of a current
license or that no license is required, SWBT shall review Applicant's
explanation of the factual and claimed legal basis for Applicant's assertions
and shall advise Applicant, in writing, whether it agrees or disagrees with
Applicant's assertions. If SWBT agrees with Applicant's assertions, the parties
may amend the applicable license and no further action shall be required of
Applicant. If SWBT does not accept Applicant's position, Applicant shall, within
15 business days, apply for a new or amended license as provided by Section
17.06(c) of this Agreement.

         17.09 Approval of License and Retroactive Charges. If SWBT approves
Applicant's application for a new or amended license, Applicant shall be liable
to SWBT for all fees and charges associated with the unauthorized attachments as
specified in Section 17.10 of this Agreement. The issuance of a new or amended
license as provided by this article shall not operate retroactively or
constitute a waiver by SWBT of any of its rights or privileges under this
Agreement or otherwise.

         17.10 Fees and Charges. This section applies to fees and charges with
respect to Applicant's facilities placed on or in SWBT pole, duct, or conduit
space which has not been assigned to Applicant. Applicant shall be liable to
SWBT for all fees and charges associated with any such unauthorized pole
attachments or conduit occupancy for which it is responsible. Attachment and
occupancy fees and charges shall continue to accrue until the unauthorized
facilities are removed from SWBT's poles or conduit system and shall include,
but not be limited to, all fees and charges which would have been due and
payable if Applicant and its predecessors had continuously complied with all
applicable SWBT licensing requirements. Such fees and charges shall be due and
payable 30 days after the date of the bill or invoice stating such fees and
charges. The parties shall engage in good faith discussions to reach a mutually
agreed determination as to the amount due and owing. In some cases, it may be
impractical, unduly difficult, or uneconomical to determine the actual amount of
fees which would have been due and payable if all licensing requirements had
been met. Therefore, if the parties, through good faith discussions fail to
reach agreement on the amount due and owing, and if the amount due and owing
cannot be determined due to Applicant's inability to provide the information
required to determine the correct amount, the amount owing with respect to each

                                   PAGE 69
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unauthorized attachment or occupancy shall be equal to three times the annual
attachment and occupancy fees in effect on the date Applicant is notified by
SWBT of the unauthorized attachment or occupancy. Payment of such fees shall be
deemed liquidated damages and not a penalty. In addition, Applicant shall
rearrange or remove its unauthorized facilities at SWBT's request to comply with
applicable placement standards, shall remove its facilities from any space
occupied by or assigned to SWBT or another joint user, and shall pay SWBT for
all costs incurred by SWBT in connection with any facilities rearrangements,
modifications, or replacements necessitated as a result of the presence of
Applicant's unauthorized facilities.

         17.11 Removal of Unauthorized Attachments. If Applicant does not apply
for a new or amended pole attachment license with respect to unauthorized
facilities within the specified period of time, or if such application is
received and specifically disapproved, SWBT shall by written notice request to
Applicant to remove its unauthorized facilities not less than 60 days from the
date of notice and Applicant shall remove the facilities within the time
specified in the notice; provided, however, that SWBT may request Applicant to
remove such facilities at an earlier date if such earlier removal is necessary
for reasons beyond SWBT's control. If the facilities have not been removed
within the time specified in the notice, SWBT may, at SWBT's option, remove
Applicant's facilities at Applicant's expense.

         17.12 No Ratification of Unlicensed Attachments or Unauthorized Use of
SWBT's Facilities. No act or failure to act by SWBT with regard to any
unlicensed attachment or occupancy or unauthorized use of SWBT's facilities
shall be deemed to constitute a ratification by SWBT of the unlicensed
attachment or occupancy or unauthorized use, nor shall the payment by Applicant
of fees and charges for unauthorized pole attachments or conduit occupancy
exonerate Applicant from civil or criminal liability for any deliberate trespass
or other illegal or wrongful conduct in connection with the placement or use of
such unauthorized facilities.

                  ARTICLE 18: REMOVAL OF APPLICANT'S FACILITIES

         18.01 Responsibility for Removing Facilities. Applicant shall be
responsible for and shall bear all expenses arising out of or in connection with
the removal of its facilities from SWBT's poles, ducts, conduits, and
rights-of-way. Such removals shall be performed in accordance with the
provisions of this article.

               (a)  When practicable, Applicant shall give SWBT at least 30
                    days' advance notice in writing of its intent to remove
                    facilities from any part of SWBT's conduit system and the
                    proposed method of removal. The notice shall include the
                    locations of the facilities to be removed, the name and
                    telephone number of the manager responsible for removal of
                    the facilities, and the estimated dates when removal of the
                    facilities will begin and end.

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               (b)  Applicant shall, if requested by SWBT to do so, place a pull
                    mandrel (slug) through all or any specified part of the duct
                    which was occupied by Applicant.

               (c)  Except as otherwise agreed upon in writing by the parties,
                    Applicant must, after removing its facilities, plug all
                    previously occupied ducts at the entrances to SWBT's
                    manholes (if SWBT would itself plug the ducts under the same
                    circumstances) in accordance with the standards set by SWBT
                    for its own operations, provided that such standards have
                    been communicated in writing to Applicant at least 60 days
                    in advance of the removal of Applicant's facilities.

               (d)  Applicant shall be solely responsible for the removal of its
                    own facilities from SWBT's poles, ducts, conduits, and
                    rights-of-way and for (1) paying all persons and entities
                    which provide materials, labor, access to real or personal
                    property, or other goods or services in connection with the
                    removal of Applicant's facilities from SWBT's poles, ducts,
                    conduits, or rights-of-way and (2) directing the activities
                    of all such personnel while they are physically present on,
                    within, or in the vicinity of SWBT's poles, ducts, conduits,
                    or rights-of-way.

               (e)  When Applicant no longer intends to occupy space on a SWBT
                    pole or in a SWBT duct or conduit, Applicant will provide
                    written notification to SWBT that it wishes to terminate the
                    license with respect to such space and will remove its
                    facilities from the space described in the notice. Upon
                    removal of Applicant's facilities, the license shall
                    terminate and the space shall be available for reassignment.

         18.02 Removal of Facilities Not in Active Use. At SWBT's request,
Applicant shall remove from SWBT's poles, ducts, conduits, and rights-of-way any
of Applicant's facilities which are no longer in active use; provided, however,
that Applicant shall not be required to remove such facilities when due cause
and justification exists for allowing them to remain in place. Applicant shall
not be required to remove retired or inactive (dead) cables that have been
overlashed by other facilities which remain in active use unless removal
expenses are paid by the person or entity requesting removal of such facilities.
Applicant shall not be required to remove cables that would require excavation
to remove unless the person or entity requesting removal of such cables bears
the expenses of such excavation in a manner analogous to the provisions of
Section 10.02(c) of this Agreement. Applicant shall not abandon any of its
facilities by leaving them on SWBT's poles, in SWBT's ducts, conduits, or
rights-of-way, at any location where they may block or obstruct access to SWBT's
poles or any part of SWBT's conduit system, or on any public or private property
(other than property owned or controlled by Applicant) in the vicinity of SWBT's
poles, ducts, conduits, or rights-of-way.

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         18.03 Removal Following Termination of License. Applicant shall remove
its facilities from SWBT's poles, ducts, conduits, or rights-of-way within 60
days, or within such other period of time as shall be mutually agreeable to the
parties, after termination of the license authorizing the attachment of such
facilities to SWBT's poles or the placement of such facilities in SWBT's ducts,
conduits, or rights-of-way.

         18.04 Removal Following Replacement of Facilities. Applicant shall
remove facilities no longer in service from SWBT's poles or conduit system
within 60 days, or within such other period of time as shall be mutually
agreeable to the parties, after the date Applicant replaces existing facilities
on a pole or in a conduit with substitute facilities on the same pole or in the
same conduit; provided, however, that removal of facilities from the maintenance
duct shall be governed by Sections 12.04, 13.03, and 15.02 of this Agreement and
not by this section.

         18.05 Removal to Avoid Forfeiture. If the presence of Applicant's
facilities on SWBT's poles or in SWBT's ducts, conduits, or rights-of-way would
cause a forfeiture of the rights of SWBT to occupy the property where such pole,
duct, conduit, or right-of-way is located, SWBT will promptly notify Applicant
in writing and Applicant shall not, without due cause and justification, refuse
to remove its facilities within such time as may be required to prevent such
forfeiture. SWBT will give Applicant not less than 60 days from the date of
notice to remove Applicant's facilities unless prior removal is required to
prevent the forfeiture of SWBT's rights. At Applicant's request, the parties
will engage in good faith negotiations with each other, with joint users, and
with third-party property owners and cooperatively take such other steps as may
be necessary to avoid the unnecessary removal of Applicant's facilities in the
face of a threatened forfeiture.

         18.06 Notice of Completion of Removal Activities. Applicant shall give
written notice to SWBT stating the date on which the removal of its facilities
from SWBT's poles, ducts, conduits, and rights-of-way has been completed.
Charges shall continue to accrue with respect to such facilities until
Applicant's facilities have been removed, pull mandrels (slugs) have been pulled
if required by Section 18.01(b) of this Agreement, Applicant has plugged all
previously occupied ducts at the entrances to SWBT's manholes as required by
Section 18.01(c) of this Agreement, and the notice required by this section has
been given.

         18.07 Removal of Facilities by SWBT; Notice of Intent to Remove. If
Applicant fails to remove its facilities from SWBT's poles, ducts, or conduits
in accordance with the provisions of Sections 18.01-18.06 of this Agreement,
SWBT may remove such facilities and store them at Applicant's expense in a
public warehouse or elsewhere without being deemed guilty of trespass or
conversion and without becoming liable to Applicant for any injury, loss, or
damage resulting from such actions. SWBT shall give Applicant not less than 60
days prior written notice of its intent to remove Applicant's facilities
pursuant to this section. The notice shall state:

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               (a)  the date when SWBT plans to commence removal of Applicant's
                    facilities, and that Applicant may remove the facilities at
                    Applicant's sole cost and expense at any time before the
                    date specified;

               (b)  SWBT's plans with respect to disposition of the facilities
                    removed; and

               (c)  that Applicant's failure to remove the facilities or make
                    alternative arrangements with SWBT for removal and
                    disposition of the facilities shall constitute an
                    abandonment of the facilities and of any interest therein.

         18.08 Removal of Facilities by SWBT. If SWBT removes any of Applicant's
facilities pursuant to this article, Applicant shall reimburse SWBT for SWBT's
costs in connection with the removal, storage, delivery, or other disposition of
the removed facilities.

         18.09 Reattachment or Subsequent Attachment Following Removal. After
Applicant's facilities have been properly removed pursuant to the provisions of
this article, neither the removed facilities nor replacement facilities shall be
attached to SWBT's poles or placed in SWBT's conduit system until Applicant has
first submitted new applications for the facilities and complied with the
provisions of this Agreement.

                  ARTICLE 19: RATES, FEES, CHARGES, AND BILLING

         19.01 Rates, Charges and Fees Subject to Applicable Laws, Regulations,
Rules, and Commission Orders. All rates, charges and fees set forth in this
Agreement, including rates, charges and fees set forth in APPENDIX I (Schedule
of Rates, Fees, and Charges), shall be subject to all applicable federal and
state laws, rules, regulations, and commission orders, including but not limited
to (a) the Pole Attachment Act and rules, regulations, and commission orders
issued thereunder and (b) applicable orders of the State Commission in
interconnection arbitration proceedings.

         19.02 Schedule of Rates, Fees, and Charges. SWBT's current schedule of
rates, fees, and charges is attached to this Agreement as APPENDIX I and
incorporated herein as an integral part of this Agreement.

         19.03 Pole Attachment and Conduit Occupancy Fees. Until such time as
the FCC authorizes the charging of different rates to cable television systems
and telecommunications carriers, SWBT's annual rates for access to poles, ducts,
conduits, and rights-of-way shall be the same for cable television systems and
telecommunications carriers. For all attachments to SWBT's poles and occupancy
of SWBT's ducts and conduits, Applicant will pay SWBT's semiannual pole
attachment and conduit occupancy fees as specified in APPENDIX I. Pole
attachment and conduit occupancy fees shall be assessed and billed with respect
to (a) occupied space whether or not subject to a current license and (b)
assigned space as well as occupied space. Fees for pole attachments shall 

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be based on the number of Applicant's pole attachments as of the date of billing
by SWBT and shall be calculated in accordance with applicable FCC rules,
regulations, and orders. Fees for conduit occupancy shall be based on the number
of duct feet occupied by or assigned to Applicant as of the date of billing by
SWBT and shall be calculated in accordance with applicable FCC rules,
regulations, and orders.

         19.04 Billing for and Payment of Pole Attachment and Conduit Occupancy
Fees. Pole Attachment and conduit occupancy fees under this Agreement and
licenses subject to this Agreement shall be payable semiannually in advance.

               (a)  Bills shall be submitted to Applicant for two semiannual
                    billing periods, the first period including charges for the
                    months of January through June and the second including
                    charges for the months of July through December.

               (b)  Charges associated with newly licensed pole attachments and
                    conduit occupancy shall be prorated on a daily basis and
                    billed with the next semiannual bill.

               (c)  Charges shall be adjusted and retroactively prorated on a
                    daily basis following the removal of Applicant's facilities
                    and shall be retroactively adjusted as a credit on the next
                    semiannual bill.

         19.05 Application Fees. SWBT does not currently charge application fees
in connection with requests for access to poles, ducts, conduits, and
rights-of-way. SWBT does, however, impose charges, on a case-by case basis, for
work performed in processing applications for access and preparing SWBT's poles,
ducts, conduits, and rights-of-way to accommodate the facilities of parties
seeking access.

         19.06 Charges for Pre-license Survey Work. Subject to applicable
commission orders, Applicant will pay SWBT's charges for pre-license survey work
associated with the processing of Applicant's request for access. SWBT's
pre-license survey charges are not set on a fixed fee basis and will vary from
case-to-case depending on such factors as the number and location of the poles,
ducts, conduits, and rights-of-way subject to Applicant's access request, the
completeness and quality of information submitted by the Applicant in its
application, the nature of the facilities to be placed by Applicant, and the
nature and extent of facilities modification, capacity expansion, and make-ready
work proposed by Applicant.

         19.07 Charges for Facilities Modifications, Capacity Expansions, and
Make-ready Work. Subject to applicable commission orders, Applicant will pay
SWBT's charges for facilities modification, capacity expansion, and make-ready
work performed by SWBT, or by persons acting on SWBT's behalf, as provided in
other provisions of this Agreement and APPENDIX I.

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         19.08 Contract Administration Fee. Subject to applicable commission
orders, SWBT may charge Applicant a one-time contract administration as provided
in APPENDIX I. This fee, if applicable, shall be assessed for work performed in
the initial processing of this Agreement and shall be non-refundable upon
acceptance of this Agreement by SWBT.

         19.09 Administrative Record-keeping Fees. Subject to applicable
commission orders, SWBT may charge Applicant cost-based administrative
record-keeping fees (e.g., fees associated with records and billing changes
resulting from the sale, consolidation, or other transfer of Applicant's
business or facilities, name changes, and the like) as provided in APPENDIX I.

         19.10 Charges for Work Performed by SWBT Employees. Except as otherwise
specifically required by applicable commission orders, SWBT's charges to
Applicant for worked performed by SWBT employees pursuant to this Agreement
shall be computed by multiplying the fully loaded hourly rates for such
employees times the number of hours required to perform the work. Disputes over
SWBT's charges for work performed by SWBT employees, including disputes between
the parties concerning the number of hours required to perform the work, shall
be subject to the dispute resolution procedures of Article 30. Notwithstanding
the execution of this Agreement, Applicant shall have the right to challenge the
methodology utilized by SWBT to determine hourly rates for SWBT employees at any
time in any forum having jurisdiction over the subject matter.

         19.11 Due Date for Payment, Interest on Past Due Invoices, Remedies for
Non-payment, and Procedures for Disputing Charges. For fees and charges other
than charges for make-ready work, each bill or invoice submitted by SWBT to
Applicant shall state the date that payment is due, which date shall be not less
than 60 days after the date of the bill or invoice. Applicant will pay each such
bill or invoice on or before the stated due date. For make-ready work, the
payment due date shall be not less than 30 days after the date of the bill or
invoice.

               (a)  Interest on past due bills and invoices shall accrue at the
                    rate of 12% per annum, or the maximum rate allowed by law,
                    whichever is less.

               (b)  Applicant's failure to pay SWBT's fees and charges shall be
                    grounds for terminating this Agreement and licenses subject
                    to this Agreement.

               (c)  If Applicant fails to pay, when due, any fees or charges
                    billed to Applicant under this Agreement, and any portion of
                    such fees or charges remains unpaid more that 15 calendar
                    days after the due date, SWBT may send Applicant a written
                    notice advising Applicant that this Agreement, or specified
                    licenses subject to this Agreement, may be terminated if
                    such fees or charges are not paid within 15 calendar days
                    after the date of the notice. Applicant must remit to SWBT
                    all such unpaid fees or charges, whether disputed or
                    undisputed, within 15 days 

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                    after the date of the notice. If Applicant pays disputed
                    fees under protest, and it is later determined that such
                    fees or any portion thereof should be refunded, the portion
                    of fees to be refunded shall be refunded with interest at
                    the rate of 12% per annum or the maximum rate allowed by
                    law, whichever is less.

               (d)  Applicant may dispute any fees or charges billed by SWBT to
                    Applicant under this Agreement by invoking the dispute
                    resolution procedures set forth in Article 30 of this
                    Agreement.

               (e)  If Applicant does not dispute such fees or charges and any
                    portion of such undisputed fees or charges remains unpaid 30
                    calendar days after the date of the notice, SWBT may, to the
                    extent permitted by the Pole Attachment Act and applicable
                    rules, regulations, and commission orders, terminate this
                    Agreement and licenses subject to this Agreement, suspend
                    the processing of pending applications for access to SWBT's
                    poles, ducts, conduits, and rights-of-way located in this
                    State, and refuse to accept further applications for access
                    until such undisputed fees or charges, together with accrued
                    interest thereon, have been paid in full.

         19.12 Modification of Rates, Fees and Charges. Subject to applicable
federal and state laws, rules, regulations, and commission orders, SWBT shall
have the right to modify all rates, charges and fees set forth in this
Agreement, including but not limited to those listed in APPENDIX I, as provided
in this section.

               (a)  Upon written notice to Applicant, SWBT may change, on a
                    going-forward basis, the amounts of any rates, fees or
                    charges assessed under this Agreement. Pole attachment and
                    conduit occupancy rates shall not be increased more than
                    once annually.

                    (1)  The notice shall state the effective date of the
                         changes, which, in the event of a rate increase, shall
                         be no earlier than the 60th day after the notice is
                         given.

                    (2)  The changes shall be effective on the effective date
                         stated in the notice unless stayed or prohibited by a
                         court or agency of competent jurisdiction.

                    (3)  The changes shall be reflected on the first semiannual
                         bill issued on or after the effective date specified in
                         the notice.

               (b)  If the rates, fees and charges set forth in the notice are
                    not acceptable to Applicant, Applicant may, notwithstanding
                    any other provisions of this Agreement, at Applicant's
                    option (1) seek the renegotiation of this Agreement, (2)
                    terminate this Agreement, or (3) seek relief through the
                 

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                    dispute resolution process or before a court or agency of
                    competent jurisdiction.

         19.13 Disputes Over Charging Methodologies. The parties acknowledge
that the Pole Attachment Act grants the FCC regulatory authority over the rates,
terms, and conditions of access to poles, ducts, conduits, and rights-of-way.
The parties further acknowledge that, as of the date of this Agreement, this
State has not elected to assume reverse preemptive regulatory authority over
such rates, terms, and conditions by certifying to the FCC that it has made such
election. Accordingly, complaints concerning and challenges to SWBT's charging
methodologies shall be brought, in the first instance, before the FCC in
accordance with FCC procedural rules unless this State elects to preempt FCC
regulation of pole attachment rates, terms, and conditions of access; provided,
however, that nothing contained in this section shall be construed as affecting
the right of either party to seek relief from any court or agency of competent
jurisdiction in connection with the negotiation, arbitration, and approval of
interconnection agreements under 47 U.S.C. Section 252.

                    ARTICLE 20: PERFORMANCE AND PAYMENT BONDS

         20.01 Bond May Required. SWBT may require Applicant, authorized
contractors, and other persons acting on Applicant's behalf to execute
performance and payment bonds (or provide other forms of security) in amounts
and on terms sufficient to guarantee the performance of their respective
obligations arising out of or in connection with this Agreement only as provided
in subsections (a)-(b) of this section and Section 20.02. Bonds shall not be
required for entities meeting all self-insurance requirements of Section 23.02
of this Agreement.

               (a)  If Applicant elects to perform make-ready or facilities
                    modification work under Section 6.08(c) or Sections
                    10.02-10.05 of this Agreement, SWBT may require Applicant,
                    authorized contractors, and other persons acting on
                    Applicant's behalf to execute bonds equivalent to those
                    which would be required by SWBT if the work had been
                    performed by contractors, subcontractors, or other persons
                    selected directly by SWBT. No bonds shall be required of
                    Applicant, authorized contractors, or other persons acting
                    on Applicant's behalf except in those situations where a
                    bond would be required if the work were being performed on
                    SWBT's behalf.

               (b)  No other bond shall be required of Applicant to secure
                    obligations arising under this Agreement in the absence of
                    due cause and justification.

               (c)  If a bond or similar form of assurance is required of
                    Applicant, an authorized contractor, or other person acting
                    on Applicant's behalf, Applicant shall promptly submit to
                    SWBT, upon request, adequate proof that the bond remains in
                    full force and effect and provide certification 

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                    from the company issuing the bond that the bond will not be
                    cancelled, changed or materially altered without first
                    providing SWBT 60 days written notice.

               (d)  SWBT may communicate directly with the issuer of any bond
                    required by SWBT pursuant to this section to verify the
                    terms of the bond, to confirm that the bond remains in
                    force, and to make demand on the issuer for payment or
                    performance of any obligations secured by the bond.

         20.02 Payment and Performance Bonds in Favor of Contractors and
Subcontractors. Applicant shall be responsible for paying all employees,
contractors, subcontractors, mechanics, materialmen and other persons or
entities performing work or providing materials in connection with (a) the
performance of facilities modification, capacity expansion, or make-ready work
by Applicant, authorized contractors, or other persons acting on Applicant's
behalf under Sections 6.08(c) and 10.02-10.05 of this Agreement or (b) the
construction, attachment, use, inspection, maintenance, repair, rearrangement,
modification, and removal of any of Applicant's facilities attached or to be
attached to SWBT's poles or placed or to be placed within SWBT's ducts,
conduits, or rights-of-way. In the event any claim or demand is made on SWBT by
any such employee, contractor, subcontractor, mechanic, materialman, or other
person or entity providing such materials or performing such work, SWBT may
require, in addition to any security provided under Section 20.01 of this
Agreement, that Applicant execute payment or performance bonds, or provide such
other security, as SWBT may deem reasonable or necessary to protect SWBT from
any such claim or demand.

                           ARTICLE 21: INDEMNIFICATION

         21.01 Risks Associated with Outside Plant Operations. The parties
acknowledge that SWBT's outside plant facilities include thousands of miles of
pole lines, conduits, and rights-of-way located on public and private property
throughout SWBT's service area, that SWBT cannot control or continuously monitor
activities that occur at these sites, and that the risks associated with outside
plant operations and facilities are not similar to the risks associated with
operations occurring inside SWBT's central offices and other secure SWBT
buildings and structures. The parties further acknowledge that the presence of
multiple firms on or in poles, ducts, conduits, and rights-of-way owned or
controlled by SWBT requires that liability risks be fairly allocated between the
parties and that it is the parties' intent to allocate such risks in a just,
reasonable, and nondiscriminatory manner which addresses known risks associated
with the outside plant environment and activities and conditions at outside
plant locations.

         21.02 Control of Premises. Applicant acknowledges that its employees
and other persons acting on Applicant's behalf, and employees of joint users and
other persons acting on behalf of joint users, will be present, without
supervision or control by SWBT, and in many cases without SWBT's knowledge, on,
within, and in the vicinity of 

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SWBT's poles, ducts, conduits, and rights-of-way. During those times when
Applicant's employees and personnel are present at such sites, Applicant shall
be deemed, for the purpose of allocating liabilities between the parties, to be
an independent contractor in control of the premises except as otherwise
provided in this section. Although SWBT inspectors may be present at the site of
work being performed by Applicant or persons acting on Applicant's behalf, such
inspectors shall have no authority to direct Applicant or personnel acting on
Applicant's behalf concerning the method or manner by which the work is to be
performed, and the presence of a SWBT inspector shall not result in SWBT's being
deemed to be in control of the premises. When both parties are present and
performing work operations at a site subject to this section, SWBT and Applicant
shall be deemed to be jointly in control of the premises. When poles, ducts,
conduits, or rights-of-way occupy property owned by third parties, neither party
shall be deemed to be in control of the premises, except as otherwise provided
by law, at times when such party's work operations are not in progress. Work
operations shall be considered to be in progress from the time work commences
until such work is completed whether or not employees of a party or persons
acting on such party's behalf are actually present at the site.

         21.03 INDEMNITY AGAINST AND LIMITATIONS OF LIABILITY WITH RESPECT TO
CERTAIN NEGLIGENT ACTS AND OMISSIONS. THIS ARTICLE INCLUDES PROVISIONS
INDEMNIFYING EACH PARTY FROM LIABILITIES ARISING OUT OF OR IN CONNECTION WITH
CERTAIN NEGLIGENT ACTS AND OMISSIONS OF SUCH PARTY. THIS ARTICLE ALSO INCLUDES
PROVISIONS LIMITING THE LIABILITIES OF EACH PARTY ARISING OUT OF OR IN
CONNECTION WITH CERTAIN NEGLIGENT ACTS AND OMISSIONS OF SUCH PARTY.

         21.04 Indemnities Excluded. Except as otherwise specifically provided
in this article, neither party (as an "indemnifying party") shall be required to
indemnify or defend the other party (as an "indemnified party") against, or hold
the indemnified party harmless from, any suit, claim, demand, loss, damage,
liability, fine, penalty, or expense arising out of:

               (a)  any breach by the indemnified party of any provision of this
                    Agreement or any breach by the indemnified party of the
                    parties' interconnection agreement, if any;

               (b)  the violation of any law by any employee of the indemnified
                    party or other person acting on the indemnified party's
                    behalf;

               (c)  willful or intentional misconduct or gross negligence
                    committed by any employee of the indemnified party or by any
                    other person acting on the indemnified party's behalf; or

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               (d)  any negligent act or acts committed by any employee of the
                    indemnified party or other person acting on the indemnified
                    party's behalf, if such negligent act or acts are the sole
                    producing cause of the injury, loss, or damage giving rise
                    to the suit, claim, demand, loss, damage, liability, fine,
                    penalty, or expense for which indemnity is requested.

         21.05 Workplace Injuries. The parties acknowledge that injuries may
occur at sites where work is being performed by or for either party and that
primary responsibility for preventing workplace injuries shall be placed on the
party controlling work operations at the site. Workplace injuries may result
from any of variety of causes, including but not limited to electrocution
associated with contact with electric power lines on poles or use of defective
equipment, falls from poles resulting from the negligence of the injured person
or co-workers or due to the existence of unsafe conditions on or in the vicinity
of the pole, cave-ins and other accidents at excavation sites, explosion of
combustible gases within or in the vicinity of a conduit system, exposure to
hazardous substances or noxious gases at the site, acts of God, and acts and
omissions of third parties over whom neither party has control. Except as
expressly provided in this Agreement to the contrary, each party shall
indemnify, on request defend, and hold the other party harmless from any and all
suits, claims, demands, losses, damages, liabilities, fines, penalties, or
expenses of every kind and character, on account of or in connection with any
injury, loss, or damage suffered by any person, which arises out of or in
connection with the personal injury or death of any employee of the indemnifying
party (or other person acting on the indemnifying party's behalf) if such injury
or death results, in whole or in part, from any occurrence or condition on,
within, or in the vicinity of SWBT's poles, ducts, conduits, and rights-of-way;
provided, however, that Applicant's indemnification duties under this section
shall arise only if the person injured is present at such site in connection
with the performance or anticipated performance of any act required or permitted
to be performed by Applicant or by persons acting on Applicant's behalf pursuant
to this Agreement. Indemnities provided by this section shall be subject to the
exclusions set forth in Section 21.04 and include but are not limited to
indemnities arising out of or in connection with claims arising from or in any
way connected with any injury, sickness, disease, or death of any employee of
the indemnifying party or any person acting on the indemnifying party's behalf
attributable or allegedly attributable to occurrences or conditions on, within,
or in the vicinity of SWBT's poles, ducts, conduits, and rights-of-way. EXCEPT
AS PROVIDED ABOVE IN SUBSECTIONS 21.04(c)-(d), THE INDEMNIFYING PARTY'S
INDEMNIFICATION OBLIGATIONS UNDER THIS SECTION SHALL ARISE EVEN IF THE INJURY,
SICKNESS, DISEASE, OR DEATH WAS ATTRIBUTABLE IN PART TO NEGLIGENT ACTS OR
OMISSIONS OF THE INDEMNIFIED PARTY.

         21.06 Other Claims Brought Against Either Party by Employees and Other
Persons Acting on the Other Party's Behalf. Nothing contained in this Agreement
shall create any contractual liability or other liability on the part of either
party to any employee, contractor, or subcontractor of the other party or any
other person acting on the other party's behalf. Each party shall indemnify, on
request defend, and hold the other 

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party harmless from any and all suits, claims, demands, losses, damages,
liabilities, or expenses of every kind and character (other than workplace
injury claims subject to Section 21.05 above) made, brought, or sought against
the indemnified party by any employee, contractor, or subcontractor of the
indemnifying party or by any other person acting on the indemnifying party's
behalf; provided, however, that this section shall apply only to suits, claims,
demands, losses, damages, liabilities, or expenses related to the subject matter
of this Agreement. Indemnities provided by this section shall be subject to the
exclusions set forth in Section 21.04 and include but are not limited to
indemnities arising out of or in connection with claims arising from or in any
way connected with the employment relationship or other claimed relationship
between the indemnifying party and the employee, contractor, subcontractor, or
other person acting on the indemnifying party's behalf; claims arising out of
disputes over payments due or allegedly due to any employee, contractor,
subcontractor, or other person acting on the indemnifying party's behalf; and
claims arising out of other contract disputes between the indemnifying party and
the employee, contractor, subcontractor, or other person acting on the
indemnifying party's behalf. EXCEPT AS PROVIDED ABOVE IN SUBSECTIONS
21.04(c)-(d), THE INDEMNIFYING PARTY'S INDEMNIFICATION OBLIGATIONS UNDER THIS
SECTION SHALL ARISE EVEN IF THE INJURY, LOSS, OR DAMAGE GIVING RISE TO THE
INDEMNIFICATION CLAIM WAS ATTRIBUTABLE IN PART TO NEGLIGENT ACTS OR OMISSIONS OF
THE INDEMNIFIED PARTY.

         21.07 Claims Brought Against Either Party by Vendors, Suppliers,
Customers, and other Persons in Privity of Contract with the Other Party. The
parties acknowledge that neither party controls the contractual relationships
between the other party and vendors, suppliers, customers, and other persons in
privity of contract with the other party and that nothing contained in this
Agreement shall create any contractual or other liability of either party to any
vendor, supplier, customer, or other person or entity in privity of contract
with the other party. Each party shall indemnify, on request defend, and hold
the other party harmless from any and all suits, claims, demands, losses,
damages, liabilities, or expenses of every kind and character, made, brought, or
sought against the indemnified party by any vendor, supplier, or customer of the
indemnifying party or by any other person or entity in privity with the
indemnifying party; provided, however, that this section shall apply only to
suits, claims, demands, losses, damages, liabilities, or expenses related to the
subject matter of this Agreement or Applicant's use of SWBT's poles, ducts,
conduits, or rights-of-way. The indemnifying party may not, as a defense to any
obligations of the indemnifying party under this section, assert that the
indemnified party's claims against the indemnifying party are barred by any
tariff or contract limitation of liability applicable to the indemnifying
party's vendor, supplier, or customer or to such other person in privity of
contract with the indemnifying party. Indemnities provided by this section shall
be subject to the exclusions set forth in Section 21.04 and include but are not
limited to indemnities for claims against either party arising out of or in
connection with the failure by the other party to meet its obligations
(including but not limited to contract and tariff obligations) to such other
party's customers and suppliers. EXCEPT AS PROVIDED ABOVE IN SUBSECTIONS
21.04(c)-(d), THE INDEMNIFYING PARTY'S INDEMNIFICATION OBLIGATIONS UNDER THIS

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SECTION SHALL ARISE EVEN IF THE INJURY, LOSS, OR DAMAGE GIVING RISE TO THE
INDEMNIFICATION CLAIM WAS ATTRIBUTABLE IN PART TO NEGLIGENT ACTS OR OMISSIONS OF
THE INDEMNIFIED PARTY.

         21.08 Claims Brought Against Either Party by Such Party's Own
Employees, Contractors, Subcontractors, or Other Persons Acting on Such Party's
Behalf, and Claims Brought Against Either Party by Such Party's Own Vendors,
Suppliers, Customers, or Other Persons in Privity of Contract with Such Party.
Neither party shall be entitled to indemnity, contribution, or subrogation from
or by the other party with respect to any suits, claims, demands, losses,
damages, liabilities, or expenses, of any kind or character, made, brought, or
sought against such party by any employee, contractor, or subcontractor of such
party, by any other person acting on behalf of such party, by any vendor,
supplier, or customer of such party, or by any other person or entity in privity
of contract with such party, if such suit, claim, demand, loss, damage,
liability, or expense arises directly out of or in connection with the subject
matter of this Agreement or the use by Applicant of SWBT's poles, ducts,
conduits, or rights-of-way. Indemnities excluded by this section include, but
are not limited to, indemnities for claims against either party arising out of
or in connection with employment-related disputes between either party and its
employees; claims against either party by contractors, subcontractors, and
suppliers performing work or supplying materials to SWBT sites at the request of
such party; and other failures by either party to meet its obligations
(including but not limited to contract and tariff obligations) to such party's
own customers and suppliers. THE INDEMNIFICATION EXCLUSIONS OF THIS SECTION
SHALL APPLY EVEN IF THE INJURY, LOSS, OR DAMAGE GIVING RISE TO THE
INDEMNIFICATION CLAIM WAS ATTRIBUTABLE IN PART TO THE NEGLIGENT ACTS OR
OMISSIONS OF THE INDEMNIFYING PARTY BUT SHALL NOT APPLY IF THE INJURY, LOSS, OR
DAMAGE GIVING RISE TO THE INDEMNIFICATION CLAIM AROSE FROM WILLFUL OR
INTENTIONAL MISCONDUCT OR GROSS NEGLIGENCE COMMITTED BY ANY EMPLOYEE OF THE
INDEMNIFYING PARTY OR ANY OTHER PERSON ACTING ON THE INDEMNIFYING PARTY'S BEHALF
OR AROSE FROM ANY NEGLIGENT ACT OR ACTS COMMITTED BY ANY EMPLOYEE OF THE
INDEMNIFYING PARTY OR OTHER PERSON ACTING ON THE INDEMNIFYING PARTY'S BEHALF, IF
SUCH NEGLIGENT ACT OR ACTS ARE THE SOLE PRODUCING CAUSE OF THE INJURY, LOSS, OR
DAMAGE GIVING RISE TO THE SUIT, CLAIM, DEMAND, LOSS, DAMAGE, LIABILITY, FINE,
PENALTY, OR EXPENSE FOR WHICH INDEMNITY IS REQUESTED.

         21.09 Injuries to Third Parties and Third-Party Property Owners
Resulting from the Parties' Conduct. Each party shall indemnify, on request
defend, and hold the other party harmless from any and all suits, claims,
demands, losses, damages, liabilities, fines, penalties, or expenses, of every
kind and character, on account of or in connection with the personal injury or
death of any third party or physical damage to real or personal property owned
by a third party, arising, in whole or in part, out of or in connection with the
conduct of employees of the indemnifying party or other persons acting on the

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indemnifying party's behalf while such employees or other persons are present
on, within, or in the vicinity of any SWBT pole, duct, conduit, or right-of-way
in connection with the performance or anticipated performance of any act
required or authorized to be performed pursuant to this Agreement. Indemnities
provided by this section shall be subject to the exclusions set forth in Section
21.04 and include but are not limited to indemnities arising out of or in
connection with personal injury, death, and property damage claims by third
parties based on willful or intentional misconduct and negligent acts and
omissions of the indemnifying party.

         21.10 Indemnification for Environmental Claims. The parties acknowledge
that hazardous substances may be present on, within, or in the vicinity of
SWBT's poles, ducts, conduits, or rights-of-way; that employees and other
persons acting on the parties' behalf working on, within, or in the vicinity of
SWBT's poles, ducts, conduits, or rights-of-way should be familiar with
environmental laws and environmental concerns which arise in outside plant
contexts; that all such employees and other persons should be prepared to
recognize and deal with environmental contingencies existing at specific sites;
and that liabilities associated with environmental claims arising out of or in
connection with the subject matter of this Agreement shall be allocated between
the parties as set forth in this section.

               (a)  Each party shall indemnify, on request defend, and hold the
                    other party harmless from any and all suits, claims,
                    demands, losses, damages, liabilities, fines, penalties, or
                    expenses, of every kind and character, on account of or in
                    connection with any injury, loss, or damage to any person or
                    property, or to the environment, arising out of or in
                    connection with the violation or breach, by any employee of
                    the indemnifying party or other person acting on the
                    indemnifying party or other person acting on the
                    indemnifying party's behalf, of (1) any federal, state, or
                    local environmental statute, rules, regulation, ordinance,
                    or other law or (2) any provision or requirement of this
                    Agreement dealing with hazardous substances or protection of
                    the environment.

               (b)  Each party shall indemnify, on request defend, and hold the
                    other party harmless from any and all suits, claims,
                    demands, losses, damages, liabilities, fines, penalties, or
                    expenses, of every kind and character, on account of or in
                    connection with any injury, loss, or damage to any person or
                    property, or to the environment, arising out of or in
                    connection with the release or discharge, onto any public or
                    private property, of any hazardous substances, regardless of
                    the source of such hazardous substances, by any employee of
                    the indemnifying party, or by any person acting on the
                    indemnifying party's beheld, while present on, within, or in
                    the vicinity of any SWBT pole, duct, conduit, or
                    right-of-way. Indemnities provided by this subsection
                    include but are not limited to indemnities arising out of or
                    in connection with the release or discharge of water and
                    other substances from SWBT's manholes or other conduit
                    facilities.

                                   PAGE 83
<PAGE>   372

               (c)  Each party shall indemnify, on request defend, and hold the
                    other party harmless from any and all suits, claims,
                    demands, losses, damages, liabilities, fines, penalties, or
                    expenses, of every kind and character, on account of or in
                    connection with any injury, loss, or damage to any person or
                    property, or to the environment, arising out of or in
                    connection with the removal or disposal of any hazardous
                    substances by the indemnifying party or by any person acting
                    on the indemnifying party's behalf, or arising out of or in
                    connection with the subsequent storage, processing or other
                    handling of such hazardous substances by any person or
                    entity after they have been removed by the indemnifying
                    party or persons acting on the indemnifying party's behalf
                    from the site of any SWBT pole, duct, conduit, or
                    right-of-way. For the purposes of this subsection, any
                    person or entity removing or disposing of hazardous
                    substances at the request of the indemnifying party or at
                    the request of any person acting on the indemnifying party's
                    behalf, and any person or entity subsequently receiving,
                    storing, processing, or otherwise handling such hazardous
                    substances shall be considered to be a person acting on the
                    indemnifying party's behalf.

               (d)  Except as otherwise specifically provided in this section,
                    neither party shall be required to indemnify or defend the
                    other party against, or hold the other party harmless from
                    any loss, damage, claim, demand, suit, liability, fine,
                    penalty or expense for which the other party may be liable
                    under any federal, state, or local environmental statute,
                    rule, regulation, ordinance, or other law.

         21.11 Miscellaneous Claims. Applicant shall indemnify, on request
defend, and hold SWBT harmless from any and all suits, claims, demands, losses,
damages, liabilities, fines, penalties, and expenses, of every kind and
character, made, brought, or sought against SWBT by any person or entity,
arising out of or in connection with the subject matter of this Agreement and
based on either:

               (a)  claims for taxes, municipal fees, franchise fees,
                    right-to-use fees, and other special charges assessed on
                    SWBT due to the placement or presence of Applicant's
                    facilities on or within SWBT's poles, ducts, conduits, or
                    rights-of-way; or

               (b)  claims based on the violation by Applicant of any third
                    party's intellectual property rights, including but not
                    limited to claims for copyright infringement, patent
                    infringement, or unauthorized use or transmission of
                    television or radio broadcast programs or other program
                    material.

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         21.12 Applicant's General Indemnity Obligations to SWBT. This section
applies only in those situations not expressly covered by Sections 21.05-21.11
and does not apply to any suit, claim, demand, loss, damage, or expense
resulting from Applicant's enforcement of its rights against SWBT pursuant to
this Agreement or other provisions in the parties' interconnection agreement, if
any. Except as otherwise expressly provided in this Agreement to the contrary,
and subject to the exclusions set forth in Section 21.04, Applicant shall
indemnify, on request defend, and hold SWBT harmless from any and all suits,
claims, demands, losses, damages, liabilities, fines, penalties, and expenses,
of every kind and character, on account of or in connection with any injury,
loss, or damage to any person or property, or to the environment, arising out of
or in connection with Applicant's access to or use of SWBT's poles, ducts,
conduits, or rights-of-way, Applicant's performance of any acts authorized under
this Agreement, or the presence or activities of Applicant's employees or other
personnel acting on Applicant's behalf on, within, or in the vicinity of SWBT's
poles, ducts, conduits, or rights-of-way.

         21.13 SWBT's General Indemnity Obligations to Applicant. This section
applies only in those situations not expressly covered by Sections 21.05-21.10
and does not apply to any suit, claim, demand, loss, damage, or expense
resulting from SWBT's enforcement of its rights against Applicant pursuant to
this Agreement or other provisions in the parties' interconnection agreement, if
any. Except as otherwise expressly provided in this Agreement to the contrary,
SWBT shall indemnify, on request defend, and hold Applicant harmless from any
and all suits, claims, demands, losses, damages, liabilities, fines, penalties,
and expenses, of every kind and character, on account of or in connection with
any injury, loss, or damage to any person or property, or to the environment,
arising out of or in connection with SWBT's access to or use of SWBT's poles,
ducts, conduits, or rights-of-way, SWBT's performance of any acts authorized
under this Agreement, or the presence or activities of SWBT's employees or other
personnel acting on SWBT's behalf on, within, or in the vicinity of SWBT's
poles, ducts, conduits, or rights-of-way.

         21.14 No Rights, Claims, Causes of Action, or Remedies for the Benefit
of Third Parties. Nothing contained in this article is intended to create any
rights, claims, causes of action, or remedies for the benefit of any third
party.

         21.15 Assertion of Limitation of Liability Defenses. Each party shall
diligently assert the limitation of liability provisions of any applicable
tariff or contract in any case involving injury, loss, or damage to any customer
of such party for which the other party is not exempt from indemnification
liabilities to the indemnified party under this Agreement.

         21.16 Indemnity Liabilities Not Subject to Article 22 Limitations of
Liability. Indemnity liabilities under this article shall not be subject to
Article 22 limitations of liability.

         21.17 Defense of Suits. Upon request by the indemnified party, the
indemnifying party shall defend any suit brought against the indemnified party
for any injury, loss, or 


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damage subject to indemnification under this Agreement. The indemnified party
shall notify the indemnifying party promptly in writing of any written claims,
lawsuits, or demands for which the indemnifying party may be responsible under
this Agreement. The indemnified party shall cooperate in every reasonable way to
facilitate defense or settlement. The indemnifying party shall have the right to
control and conduct the defense and settlement of any action or claim subject to
consultation of the indemnified party. The indemnifying party shall not be
responsible for any settlement unless the indemnifying party approved such
settlement in advance and agrees to be bound by the settlement agreement.

              ARTICLE 22: LIABILITIES AND LIMITATIONS OF LIABILITY

         22.01 LIMITATIONS OF LIABILITY WITH RESPECT TO NEGLIGENT ACTS AND
OMISSIONS. THIS ARTICLE INCLUDES PROVISIONS LIMITING THE LIABILITIES OF EACH
PARTY ARISING OUT OF OR IN CONNECTION WITH CERTAIN NEGLIGENT ACTS AND OMISSIONS
OF SUCH PARTY.

         22.02 LIMITATIONS OF LIABILITY IN GENERAL. EXCEPT AS OTHERWISE
EXPRESSLY PROVIDED IN SECTIONS 21.16 AND 22.05, NEITHER PARTY'S LIABILITY TO THE
OTHER PARTY FOR DAMAGES ATTRIBUTABLE, IN WHOLE OR IN PART, TO ANY NEGLIGENT ACT
OR OMISSION IN THE PERFORMANCE OF THIS AGREEMENT, WHETHER ARISING IN CONTRACT OR
TORT, SHALL EXCEED IN THE AGGREGATE FOR ANY CALENDAR YEAR THE GREATER OF
$250,000, OR THE TOTAL AMOUNT CHARGED BY SWBT TO APPLICANT UNDER THIS AGREEMENT
FOR THE CALENDAR YEARS WHEN THE ACTS OR OMISSIONS GIVING RISE TO LIABILITY
OCCURRED. NOTHING CONTAINED IN THIS SECTION SHALL BE CONSTRUED AS LIMITING
EITHER PARTY'S LIABILITY FOR ACTS OR OMISSIONS CONSTITUTING WILLFUL OR
INTENTIONAL MISCONDUCT OR GROSS NEGLIGENCE BY SUCH PARTY.

         22.03 EXCLUSION OF LIABILITY FOR SPECIAL, INDIRECT, OR CONSEQUENTIAL
DAMAGES. NEITHER PARTY SHALL BE LIABLE TO THE OTHER PARTY FOR ANY INDIRECT,
SPECIAL, CONSEQUENTIAL, INCIDENTAL, OR PUNITIVE DAMAGES, INCLUDING BUT NOT
LIMITED TO LOSS OF ANTICIPATED PROFITS OR REVENUE OR OTHER ECONOMIC LOSS IN
CONNECTION WITH OR ARISING FROM ANY ACT OR FAILURE TO ACT PURSUANT TO THIS
AGREEMENT, EVEN IF THE OTHER PARTY HAS ADVISED SUCH PARTY OF THE POSSIBILITY OF
SUCH DAMAGES. THIS SECTION LIMITS EACH PARTY'S LIABILITY FOR INDIRECT, SPECIAL,
CONSEQUENTIAL, INCIDENTAL, OR PUNITIVE DAMAGES ARISING OUT OF OR IN CONNECTION
WITH NEGLIGENT (INCLUDING GROSSLY NEGLIGENT) ACTS OR OMISSIONS OF SUCH PARTY BUT
DOES NOT LIMIT EITHER PARTY'S LIABILITY FOR INTENTIONAL MISCONDUCT.

                                   PAGE 86
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         22.04 SWBT Not Liable to Applicant for Acts of Third Parties or Acts of
God. By affording Applicant access to poles, ducts, conduits, and rights-of-way
owned or controlled by SWBT, SWBT does not warrant, guarantee, or insure the
uninterrupted use of such facilities by Applicant. Except as specifically
provided in Section 22.05 of this Agreement, Applicant assumes all risks of
injury, loss, or damage (and the consequences of any such injury, loss, or
damage) to Applicant's facilities attached to SWBT's poles or placed in SWBT's
ducts, conduits, or rights-of-way, and SWBT shall not be liable to Applicant for
any damages to Applicant's facilities other than as provided in Section 22.05.
In no event shall SWBT be liable to Applicant under this Agreement for any
injury, loss, or damage resulting from the acts or omissions of (1) any joint
user or any person acting on a joint user's behalf, (2) any governmental body or
governmental employee, (3) any third-party property owner or persons acting on
behalf of such property owner, or (4) any licensee, invites, trespasser, or
other person present at the site or in the vicinity of any SWBT pole, duct,
conduit, or right-of-way in any capacity other than as a SWBT employee or person
acting on SWBT's behalf. In no event shall SWBT be liable to Applicant under
this Agreement for injuries, losses, or damages resulting from acts of God
(including but not limited to storms, floods, fires, and earthquakes), wars,
civil disturbances, espionage or other criminal acts committed by persons or
entities not acting on SWBT's behalf, cable cuts by persons other than SWBT's
employees or persons acting on SWBT's behalf, or other causes beyond SWBT's
control which occur at sites subject to this Agreement.

         22.05 Damage to Facilities. Except as otherwise specifically provided
in this section, neither party shall be liable to the other party for any
injury, loss, or damage (or for the direct or indirect consequences of any such
injury, loss, or damage) to such other party's facilities attached to SWBT's
poles or placed within or in the vicinity of SWBT's poles, ducts, conduits, or
rights-of-way.

               (a)  Each party (the "responsible party"), and persons acting on
                    behalf of the responsible party, shall exercise due care to
                    avoid damaging the facilities of the other party (the
                    "injured party"). In the event such damage occurs, the
                    responsible party or persons acting on behalf of the
                    responsible party shall immediately report such damages to
                    the injured party, and the injured party shall promptly make
                    such arrangements as may be necessary to restore service to
                    its customers using the facilities affected.

               (b)  The responsible party shall reimburse the injured party for
                    the actual costs incurred by the injured party for repair of
                    facilities damaged by the willful misconduct, grossly
                    negligent acts, grossly negligent omissions, and negligent
                    acts (but not negligent omissions other than grossly
                    negligent omissions) of employees of the responsible party.

               (c)  The responsible party shall reimburse the injured party for
                    the actual costs incurred by the injured party for repair of
                    facilities damaged by the 

                                   PAGE 87
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                    willful misconduct, grossly negligent acts or omissions, and
                    negligent acts (but not negligent omissions other than
                    grossly negligent omissions) of independent contractors
                    acting on the responsible party's behalf; provided, however,
                    that the injured party shall be limited to recovery of those
                    costs which cannot be recovered from the independent
                    contractor causing the damage. The responsible party shall
                    not be liable to the injured party under this section until
                    the injured party's claims against the independent
                    contractor causing the damage have been adjudicated or
                    settled and the amount of the injured party's claim against
                    the responsible party is determinable.

                (d) NEITHER PARTY SHALL BE REQUIRED BY THIS SECTION TO REIMBURSE
                    THE OTHER PARTY FOR COSTS INCURRED AS A RESULT OF NEGLIGENT
                    OMISSIONS OTHER THAN GROSSLY NEGLIGENT OMISSIONS COVERED BY
                    SUBSECTIONS (c)-(d) OF THIS SECTION.

                (e) THIS SECTION LIMITS, BUT DOES NOT EXCLUDE, THE RESPONSIBLE
                    PARTY'S LIABILITY TO THE INJURED PARTY FOR DAMAGES CAUSED BY
                    NEGLIGENT (INCLUDING GROSSLY NEGLIGENT) ACTS OF THE
                    RESPONSIBLE PARTY AND PERSONS ACTING ON THE RESPONSIBLE
                    PARTY'S BEHALF.

         22.06 No Limitations of Liability in Contravention of Federal or State
Law. Nothing contained in this article shall be construed as exempting either
party from any liability, or limiting such party's liability, in contravention
of federal law or in contravention of the laws of this State.

         22.07 Claims Against Third Parties. Nothing contained in this article
shall be construed as requiring either party to forego any claims that such
party may have against third parties, including but not limited to contractors,
subcontractors, or persons (other than the other party's employees) acting on
the other party's behalf.

                              ARTICLE 23: INSURANCE

         23.01 Insurance Required. Applicant shall comply with the insurance
requirements specified in this section.

               (a)  Unless Applicant has provided proof of self-insurance as
                    permitted in Section 23.02 below, Applicant shall obtain and
                    maintain in full force and effect, for so long as this
                    Agreement remains in effect, insurance policies specified in
                    APPENDIX IV of this Agreement. Each policy shall name SWBT
                    as an additional insured and shall include provisions
                    requiring the insurer to give SWBT notice of any lapse,
                    cancellation, or

                                   PAGE 88
<PAGE>   377

                    termination of the policy or any modification to the
                    policy affecting SWBT's rights under the policy, including
                    but not limited to any decrease in coverage or increase in
                    deductibles.

               (b)  Except as provided in this subsection, exclusions from
                    coverage or deductibles, other than those expressly
                    permitted in APPENDIX IV, must be approved in writing by
                    SWBT. For authorized contractors and other contractors
                    performing work on, within, or in the vicinity of SWBT's
                    poles, ducts, conduits, and rights-of-way on Applicant's
                    behalf, exclusions from coverage or deductibles, other than
                    those expressly permitted in APPENDIX IV, must be approved
                    in writing by Applicant.

               (c)  Authorized contractors and other contractors performing work
                    on, within, or in the vicinity of SWBT's poles, ducts,
                    conduits, or rights-of-way on Applicant's behalf shall be
                    required to meet the same insurance requirements applicable
                    to contractors performing similar work on SWBT's behalf.
                    Applicant shall be responsible for securing compliance by
                    its contractors with this requirement and shall be liable to
                    SWBT for any damages resulting from its failure to do so.

               (d)  Self-insurance shall be permitted for persons and entities
                    (including but not limited to Applicant and authorized
                    contractors) meeting the self-insurance requirements set
                    forth in Section 23.02.

         23.02 Proof of Insurance or Self-insurance. Proof of insurance or
self-insurance shall be made pursuant to the provisions of this section.

                (a) Applicant shall submit to SWBT adequate proof (as determined
                    by SWBT) that the companies insuring Applicant are providing
                    all coverages required by this Agreement. Applicant's
                    insurers shall provide SWBT with certifications that
                    required coverages will not be cancelled, changed or
                    materially altered (e.g., by increasing deductibles or
                    altering exclusions from coverage) except after 30 days
                    written notice to SWBT.

                (b) SWBT will accept certified proof of a person or entity's
                    qualification as a self-insurer for Workers' Compensation
                    and Employers Liability, where self-insurance is permitted,
                    upon receipt of a current copy of a Certificate of Authority
                    to Self-insure issued by the Workers' Compensation
                    Commission of this State. SWBT will accept self-insurance by
                    a person or entity in lieu of other Commercial General
                    Liability and Automobile Liability Coverage if such person
                    or entity warrants that its net worth, as shown by its most
                    recent audited financial statement with no negative notes,
                    is at least 10 times the minimum liability limits set forth
                    in APPENDIX IV and SWBT is satisfied that 

                                   PAGE 89
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                    such entity will be able to meet its liability obligations
                    under this Agreement.

               (c)  Applicant shall be responsible for determining whether
                    contractors and other persons present on Applicant's behalf
                    on, within, and in the vicinity of SWBT's poles, ducts,
                    conduits, and rights-of-way meet the self-insurance
                    requirements of this subsection. Applicant may accept
                    certified proof of any such person's or entity's
                    qualification as a self-insurer for Workers' Compensation
                    and Employers Liability, where self-insurance is permitted,
                    upon receipt of a current copy of a Certificate of Authority
                    to Self-insure issued by the Workers' Compensation
                    Commission of this State. Applicant may accept proof of
                    self-insurance by a person or entity in lieu of other
                    Commercial General Liability and Automobile Liability
                    Coverage if such person or entity warrants that its net
                    worth, as shown by its most recent audited financial
                    statement with no negative notes, is at least 10 times the
                    minimum liability limits set forth in APPENDIX IV and
                    Applicant is satisfied that such entity will be able to meet
                    its liability obligations with respect to activities
                    performed on, within, and in the vicinity of SWBT's poles,
                    ducts, conduits, and rights-of-way.

         23.03 Licensing Contingent on Proof of Insurance. All insurance
required in accordance with APPENDIX IV, or self-insurance as permitted in
Section 23.02, must be in effect before SWBT will issue pole attachment or
conduit occupancy licenses under this Agreement and shall remain in force until
all of Applicant's facilities have been removed from SWBT's poles, ducts,
conduits, and rights-of-way.

         23.04 Failure to Obtain or Maintain Coverage. Applicant's failure to
obtain and maintain the required levels and types of insurance coverage required
under this Agreement shall be grounds for termination of this Agreement and
licenses subject to this Agreement. If an insurance carrier shall at any time
notify Applicant or SWBT that any policy or policies of insurance required under
this Agreement will be cancelled or changed in any manner which will result in
Applicant's failure to meet the requirements of this Agreement, SWBT may
terminate this Agreement and all licenses subject to this Agreement not less
than 60 days after giving Applicant written notice of its intention to do so,
and such termination shall be effective on the termination date specified in the
notice unless Applicant has obtained (or made arrangements satisfactory to SWBT
to obtain) the required coverage from another source. In the alternative, SWBT
may, in its sole discretion, elect to take such action as may be necessary to
keep such policy in effect with the required coverages.

                        ARTICLE 24: ASSIGNMENT OF RIGHTS

         24.01 Assignment Permitted. Neither party may assign or otherwise
transfer its rights or obligations under this Agreement except as provided in
this section.

                                   PAGE 90

<PAGE>   379


               (a)  SWBT may assign its rights, delegate its benefits, and
                    delegate its duties and obligations under this Agreement,
                    without Applicant's consent, to any entity controlling,
                    controlled by, or under common control with SWBT or which
                    acquires or succeeds to ownership of substantially all of
                    SWBT's assets.

               (b)  Applicant may assign its rights, delegate its benefits, and
                    delegate its duties and obligations under this Agreement,
                    without SWBT's consent, to: any telecommunications carrier
                    or cable system operator which (1) is entitled to access to
                    SWBT's poles, ducts, conduits, and rights-of-way under the
                    Pole Attachment Act and (2) controls, is controlled by, or
                    is under common control with Applicant or acquires and
                    succeeds to ownership of substantially all of Applicant's
                    assets; provided, however, that such assignment shall not be
                    effective until Applicant has given SWBT written notice of
                    the assignment pursuant to Section 24.03 and guaranteed the
                    performance of Applicant's assignee or successor.
                    Applicant's assignee or successor shall assume all
                    outstanding obligations of Applicant under this Agreement,
                    including but not limited to all liabilities and contingent
                    liabilities of Applicant arising out of or in connection
                    with this Agreement.

               (c)  Applicant may, ancillary to a bona fide loan transaction
                    between Applicant and any lender, and without SWBT's
                    consent, grant security interests or make collateral
                    assignments in substantially all of Applicant's assets,
                    including Applicant's rights under this Agreement, subject
                    to the express terms of this Agreement. In the event
                    Applicant's lender, in the bona fide exercise of its rights
                    as a secured lender, forecloses on its security interest or
                    arranges for a third party to acquire Applicant's assets
                    through public or private sale or through an Agreement with
                    Applicant, Applicant's lender or the third party acquiring
                    Applicant's rights under this Agreement shall assume all
                    outstanding obligations of Applicant under the agreement and
                    provide proof satisfactory to SWBT that such lender or third
                    party has complied or will comply with all requirements
                    established under this Agreement. Notwithstanding any
                    provisions of this Agreement to the contrary, such
                    foreclosure by Applicant's lender or acquisition of assets
                    by such third party shall not constitute a breach of this
                    Agreement and, upon such foreclosure or acquisition,
                    Applicant's lender or such third party shall succeed to all
                    rights and remedies of Applicant under this Agreement (other
                    than those rights and remedies, if any, which have not been
                    transferred and, if Applicant is a debtor under the Federal
                    Bankruptcy Code, those rights, if any, which remain a part
                    of the debtor's estate notwithstanding an attempted
                    foreclosure or transfer) and to all duties and obligations
                    of Applicant under the Agreement, including liability to

                                   PAGE 91
<PAGE>   380


                    SWBT for any act, omission, default, or obligation that
                    arose or occurred under the Agreement prior to the date on
                    which such lender or third party succeeds to the rights of
                    Applicant under the Agreement, as applicable.

                    (1)  In the event Applicant or Applicant's lender requests
                         that SWBT, in connection with a bona fide loan
                         transaction between Applicant and Applicant's lender,
                         sign any additional consents, or make other
                         accommodations to protect such lender's interest,
                         Applicant or Applicant's lender shall reimburse SWBT
                         for all expenses incurred by SWBT in connection with
                         such requests and accommodations, including but not
                         limited to in-house or outside legal expenses incurred
                         by SWBT in processing the request.

                    (2)  In the event Applicant or Applicant's lender desires
                         that SWBT provide notices to Applicant's lender or
                         permit Applicant's lender, in the event of a breach, to
                         cure any default or termination event if Applicant
                         fails to do so, Applicant shall notify SWBT's
                         authorized agent, as designated in Article 29 of this
                         Agreement, that such notices may be sent to Applicant's
                         lender as well to Applicant. Nothing contained in this
                         subsection shall be construed as imposing any duty on
                         SWBT in favor of Applicant's lender, and this section
                         shall not be construed to provide Applicant's lender or
                         any other third parties with any rights, claims, causes
                         of action of any kind. Applicant waives any and all
                         claims or causes of action, of every kind and
                         character, past, present, or future, arising out of or
                         in connection with the giving of any notice to
                         Applicant's lender pursuant to this section or any
                         failure to give such notice.

               (d)  Either party may assign or transfer rights or obligations
                    under this Agreement on such terms and conditions as are
                    mutually acceptable to the other party and with such other
                    party's prior written consent, which consent may be withheld
                    only for due cause and justification.

               (e)  No assignment or transfer by Applicant of rights under this
                    Agreement, licenses subject to this Agreement, or
                    authorizations granted under this Agreement shall be
                    effective until Applicant, its successors, and assigns have
                    complied with the provisions of this article, secured SWBT's
                    prior written consent to the assignment or transfer, if
                    necessary, and given SWBT notice of the assignment or
                    transfer pursuant to Section 24.03.

               (f)  Except as otherwise expressly provided in this article,
                    neither this Agreement, nor any licenses or authorizations
                    subject to this Agreement, shall inure to the benefit of
                    Applicant's successors or assigns without SWBT's prior
                    written consent.

                                   PAGE 92
<PAGE>   381


         24.02 Incorporations, Mergers, Acquisitions, and Other Changes in
Applicant's Legal Identity. When the legal identity or status of Applicant
changes, whether by incorporation, reincorporation, merger, acquisition, or
otherwise, such change shall be treated as an assignment subject to the
provisions of this article.

         24.03 Notice of Assignment. Applicant shall provide SWBT with 60 days
advance notice in writing of any assignment.

         24.04 Assignment Shall Not Relieve Applicant of Prior Obligations.
Except as otherwise expressly agreed by SWBT in writing, no assignment permitted
by SWBT under this Agreement shall relieve Applicant of any obligations arising
under or in connection with this Agreement, including but not limited to
indemnity obligations under Article 21 of this Agreement or the interconnection
agreement, if any.

         24.05 Satisfaction of Existing Obligations and Assumption of Contingent
Liabilities. SWBT may condition its approval of any requested assignment or
transfer on the assignee's or successor's payment or satisfaction of all
outstanding obligations of Applicant under this Agreement and the assignee's or
successor's assumption of any liabilities, or contingent liabilities, of
Applicant arising out of or in connection with this Agreement.

         24.06 Satisfaction of All Other Licensing Requirements. Applicant's
assignee or successor must, within 60 days following the assignment, provide
proof satisfactory to SWBT that such assignee or successor has complied or will
comply with all licensing requirements established under this Agreement,
including but not limited to requirements that such assignee or successor
verify, to the best of its information and belief, as provided in Section 17.03,
that all facilities owned or used by such assignee or successor and presently
attached to SWBT's poles or placed within any portion of SWBT's conduit system
within this State have been disclosed to SWBT and are subject to existing
licenses and that such assignee or successor has complied with the insurance
requirements set forth in Article 23 of this Agreement.

         24.07 Additional Post-Assignment Requirements. Applicant's assignee or
successor shall, within 60 days following the assignment:

               (a)  sign this Agreement as an assignee or successor expressly
                    agreeing to be bound by all provisions of this Agreement and
                    licenses subject to this Agreement;

               (b)  provide proof, satisfactory to SWBT, of such assignee's
                    assumption of the obligations of this Agreement; and

               (c)  pay a one-time contract administration fee, as provided in
                    APPENDIX I of this Agreement, if no Master Agreement for
                    Access to SWBT's Poles, 


                                   PAGE 93
<PAGE>   382

                    Ducts, Conduits, or Rights-of-Way between SWBT and such
                    assignee is in effect for this State, or an 
                    administrative record-keeping fee as provided in
                    APPENDIX I of this Agreement, if there is a Master Agreement
                    in effect for this State.

         24.08 Sublicenses Prohibited. Nothing contained in this Agreement shall
be construed as granting Applicant the right to sublicense any rights under this
Agreement or licenses subject to this Agreement to any third party. Except as
otherwise expressly permitted in this Agreement, Applicant shall not allow third
party to attach or place facilities to or in pole or conduit space occupied by
or assigned to Applicant or to utilize such space.

                ARTICLE 25: TERMINATION OF AGREEMENT OR LICENSES;
                              REMEDIES FOR BREACHES

         25.01 Termination Due to Non-Use of Facilities or Loss of Required
Authority. Applicant shall, by written notice to SWBT, terminate this Agreement
and all licenses subject to this Agreement if Applicant ceases to have authority
to do business or ceases to do business in this State, ceases to have authority
to provide or ceases to provide cable television services in this State (if
Applicant is cable television system having access to SWBT's poles, ducts,
conduits or rights-of-way solely to provide cable television service), ceases to
have authority to provide or ceases to provide telecommunications services in
this State (if Applicant is a telecommunications carrier which does not also
have authority to provide cable television service in this State), or ceases to
make active use of SWBT's poles, ducts, conduits, and rights-of-way in this
State. Applicant shall, by written notice to SWBT, terminate individual licenses
subject to this Agreement if (a) Applicant ceases to utilize the pole attachment
or conduit occupancy space subject to such licenses or (b) Applicant's
permission to use or have access to particular poles, ducts, conduits, or
rights-of-way has been revoked, denied, or terminated for reasons of safety or
any other lawful reason by any federal, state, or local governmental authority
or third-party property owner having authority to revoke, deny, or terminate
such use or access. Responsibility for terminating this Agreement or individual
licenses under the circumstances set forth in this section shall be a
contractual obligation imposed on Applicant, and the failure by Applicant to
terminate this Agreement or individual licenses pursuant to this section shall
be a material breach of this Agreement.

         25.02 Limitation, Termination, or Refusal of Access for Certain
Material Breaches. Applicant's access to SWBT's poles, ducts, conduits, and
rights-of-way shall not materially interfere with or impair service over any
facilities of SWBT or any joint user, cause material damage to SWBT's plant or
the plant of any joint user, impair the privacy of communications carried over
the facilities of SWBT or any joint user, or create serious hazards to the
health or safety of any persons working on, within, or in the vicinity of SWBT's
poles, ducts, rights-of-way or to the public. Upon reasonable notice and
opportunity to cure, SWBT may limit, terminate or refuse access if Applicant
violates this provision; provided, however, that such limitation, termination or
refusal will be 

                                   PAGE 94
<PAGE>   383

limited to Applicant's access to poles, ducts, conduits, and rights-of-way
located in the SWBT construction district in which the violation occurs, shall
be as narrowly limited in time and geographic scope as may be necessary to
enable Applicant to adopt suitable controls to prevent further violations, and
shall be subject to review, at Applicant's request, pursuant to the dispute
resolution procedures set forth in this Agreement (or, if applicable, the
parties' interconnection agreement) or, as permitted by law, before any court,
agency, or other tribunal having jurisdiction over the subject matter. In the
event Applicant invokes dispute resolution procedures or seeks review before a
court, agency, or other tribunal having jurisdiction of the subject matter, the
limitation, termination, or refusal of access may be stayed or suspended by
agreement of the parties or by order of the tribunal having jurisdiction over
the parties' dispute.

         25.03 Notice and Opportunity to Cure Breach. In the event of any
claimed breach of this Agreement by either party, the aggrieved party may give
written notice of such claimed breach as provided in this section.

                (a) The notice shall set forth in reasonable detail:

                    (1)  the conduct or circumstances complained of, together
                         with the complaining party's legal basis for asserting
                         that a breach has occurred;

                    (2)  the action believed necessary to cure the alleged
                         breach; and

                    (3)  any other matter the complaining party desires to
                         include in the notice.

                (b) Except as provided in Section 25.02 and subsection (c) of
                    this section, the complaining party shall not be entitled to
                    pursue any remedies available under this Agreement or
                    relevant law unless such notice is given and (1) the
                    breaching party fails to cure the breach within 30 days of
                    such notice, if the breach is one which can be cured within
                    30 days, or (2) the breaching party fails to commence
                    promptly and pursue diligently a cure of the breach, if the
                    required cure is such that more than 30 days will be
                    required to effect such cure; provided, however, that
                    nothing contained in this section shall preclude either
                    party from invoking the dispute resolution procedures set
                    forth in Article 30 of this Agreement, or any complaint or
                    dispute resolution procedures offered by the FCC or State
                    Commission, at any time.

                (c) Nothing contained in this section shall preclude either
                    party from filing a complaint or bringing suit in any court,
                    agency, or other tribunal of competent jurisdiction to
                    restrain or enjoin any conduct of the other party which
                    threatens the complaining party with irreparable injury,
                    loss

                                   PAGE 95
<PAGE>   384

                    or damage without first giving the notice otherwise
                    required by subsection (b).

         25.04 Remedies for Breach. Subject to the provisions of this article
and the dispute resolution procedures of Article 30, either party may terminate
this Agreement in the event of a material breach by the other party or exercise
any other legal or equitable right which such party may have to enforce the
provisions of this Agreement. Except as otherwise specifically provided in
Section 30.07, in any action based on an alleged breach of this Agreement, the
prevailing party shall be entitled to recover all costs and expenses incurred by
such party, including but not limited to reasonable attorneys' fees.

                         ARTICLE 26: FAILURE TO ENFORCE

         26.01 No Waiver. The failure by either party to take action to enforce
compliance with any of the terms or conditions of this Agreement, to give notice
of any breach, or to terminate this Agreement or any license or authorization
subject to this Agreement shall not constitute a waiver or relinquishment of any
term or condition of this Agreement, a waiver or relinquishment of the right to
give notice of breach, or waiver or relinquishment of any right to terminate
this Agreement. Notwithstanding any such failure, all terms and conditions of
this Agreement and all rights of either party hereunder shall be and remain at
all times in full force and effect.

           ARTICLE 27: EFFECTIVE DATE, TERM, AND ELECTIVE TERMINATION

         27.01 Effective Date. This Agreement shall be effective as of the
____day of ____________, 199_, or, if this Agreement has been entered into as an
appendix, attachment, or exhibit to an interconnection agreement between the
parties, the date of approval by the State Commission of the interconnection
agreement, whichever date first occurs.

         27.02 Initial Term. Unless sooner terminated as herein provided, the
initial term of this Agreement shall run from the effective date until the end
of the calendar year which includes the effective date.

         27.03 Automatic Renewal. Unless sooner terminated as herein provided,
this Agreement shall be automatically renewed for successive one-year terms
beginning on the first day of each calendar year after the effective date.

         27.04 Elective Termination. Either party may terminate this Agreement
by giving the other party at least six months prior written notice as provided
in this section.

               (a)  Applicant may terminate this Agreement with or without
                    cause.

               (b)  The parties acknowledge that the Pole Attachment Act, 47
                    U.S.C. Section 224(e), as added by the Telecommunications 
                    Act of 1996, expressly 


                                   PAGE 96
<PAGE>   385

                    directs the FCC to promulgate new regulations governing
                    charges to telecommunications carriers for access to poles,
                    ducts, conduits, and rights-of-way and that such new
                    regulations are to take effect five years after the date of
                    enactment of the Telecommunications Act of 1996 (that is,
                    February 8, 2001). The parties further acknowledge that due
                    to nondiscrimination requirements, it is desirable that
                    formal attachment agreements establishing rates, terms, and
                    conditions of access be revised simultaneously, to the
                    extent possible. Accordingly, the parties agree that SWBT
                    may terminate this Agreement only for cause during the
                    period beginning with the effective date of this Agreement
                    through February 8, 2001. Thereafter, SWBT may terminate
                    this Agreement with or without cause, subject to the
                    provisions of subsection (d) and Section 27.05 below.

               (c)  The notice of termination shall state the effective date of
                    termination, which date shall be no earlier than the last to
                    occur of the following dates: the last day of the current
                    term of this Agreement or six months after the date the
                    notice is given.

               (d)  The elective termination of this Agreement by SWBT under
                    this section shall not require immediate removal of
                    Applicant's facilities from poles, ducts, conduits, and
                    rights-of-way owned or controlled by SWBT and shall be
                    subject to the provisions of Section 27.05 below; provided,
                    however, that Applicant shall, within 60 days after the
                    effective date of the termination, either initiate
                    negotiations for continued access to SWBT's poles, ducts,
                    conduits, and rights-of-way or remove its facilities in
                    accordance with the provisions of Article 18 of this
                    Agreement.

         27.05 Effect of Elective Termination. Elective termination of this
Agreement by Applicant, as permitted under Section 27.04 of this Agreement,
shall not affect Applicant's liabilities and obligations incurred under this
Agreement prior to the effective date of termination and shall not entitle
Applicant to the refund of any advance payment made to SWBT under this
Agreement. Elective termination of this Agreement by SWBT shall not affect
SWBT's obligations to afford access to SWBT's poles, ducts, conduits, and
rights-of-way owned or controlled by SWBT as required by the Pole Attachment
Act, the Telecommunications Act of 1996, and other applicable laws, regulations,
and commission orders.

                   ARTICLE 28: CONFIDENTIALITY OF INFORMATION

         28.01 Information Provided by Applicant to SWBT. Except as otherwise
specifically provided in this Agreement, all company-specific and
customer-specific information submitted by Applicant to SWBT in connection with
this Agreement (including but not limited to information submitted in connection
with Applicant's applications for the assignment of pole attachment and
occupancy space and for pole 


                                   PAGE 97
<PAGE>   386

attachment and conduit occupancy licenses) shall be deemed to be "confidential"
or "proprietary" information of Applicant and shall be subject to the terms set
forth in this article. Confidential or proprietary information specifically
includes information or knowledge related to Applicant's review of records
regarding a particular market area, or relating to assignment of space to
Applicant in a particular market area, and further includes knowledge or
information about the timing of Applicant's request for or review of records or
its inquiry about SWBT facilities. This article does not limit the use by SWBT
of aggregate information relating to the occupancy and use of SWBT's poles,
ducts, conduits, and rights-of-way by firms other than SWBT (that is,
information submitted by Applicant and aggregated by SWBT in a manner that does
not directly or indirectly identify Applicant).

         28.02 Access Limited to Persons with a Need to Know. Confidential or
proprietary information provided by Applicant to SWBT in connection with this
Agreement shall not be disclosed to, shared with, or accessed by any person or
persons (including but not limited to personnel involved in sales, marketing,
competitive intelligence, competitive analysis, strategic planning, and similar
activities) other than those who have a need to know such information for the
limited purposes set forth in Sections 28.03-28.06.

         28.03 Permitted Uses of Applicant's Confidential Information.
Notwithstanding the provisions of Sections 28.01 and 28.02 above, SWBT and
persons acting on SWBT's behalf may utilize Applicant's confidential or
proprietary information for the following purposes: (a) posting information, as
necessary, to SWBT's outside plant records; (b) placing, constructing,
installing, operating, utilizing, maintaining, monitoring, inspecting,
repairing, relocating, transferring, conveying, removing, or managing SWBT's
poles, ducts, conduits, and rights-of-way and any SWBT facilities located on,
within, or in the vicinity of such poles, ducts, conduits, and rights-of-way;
(c) performing SWBT's obligations under this Agreement and similar agreements
with third parties; (d) performing SWBT's general obligations to afford
nondiscriminatory access to telecommunications carriers and cable television
systems under the Pole Attachment Act; (e) determining which of SWBT's poles,
ducts, conduits, and rights-of-way are (or may in the future be) available for
SWBT's own use, and making planning, engineering, construction, and budgeting
decisions relating to SWBT's poles, ducts, conduits, and rights-of-way; (f)
preparing cost studies; (g) responding to regulatory requests for information;
(h) maintaining SWBT's financial accounting records; and (i) complying with
other legal requirements relating to poles, ducts, conduits, and rights-of-way.

         28.04 Access by Third Parties. Information reflecting the assignment of
pole attachment and conduit occupancy space to Applicant may be made available
to personnel of third parties seeking access to SWBT's records under provisions,
and subject to protections, equivalent to those contained and required by
Section 7.03 of this Agreement.

                                   PAGE 98
<PAGE>   387


         28.05 Defense of Claims. In the event of a dispute between SWBT and any
person or entity, including Applicant, concerning SWBT's performance of this
Agreement, satisfaction of obligations under similar agreements with third
parties, compliance with the Pole Attachment Act, compliance with the
Telecommunications Act of 1996, or compliance with other federal, state, or
local laws, regulations, commission orders, and the like, SWBT may utilize
confidential or proprietary information submitted by Applicant in connection
with this Agreement as may be reasonable or necessary to demonstrate compliance,
protect itself from allegations of wrongdoing, or comply with subpoenas, court
orders, or reasonable discovery requests; provided, however, that SWBT shall not
disclose Applicant's proprietary or confidential information without first, at
SWBT's option: (a) obtaining an agreed protective order or nondisclosure
agreement that preserves the confidential and proprietary nature of Applicant's
information; (b) seeking such a protective order as provided by law if no agreed
protective order or nondisclosure agreement can be obtained; or (c) providing
Applicant notice of the subpoena, demand, or order and an opportunity to take
affirmative steps of its own to protect such proprietary or confidential
information.

         28.06 Response to Subpoenas, Court Orders, and Agency Orders. Nothing
contained in this article shall be construed as precluding SWBT from complying
with any subpoena, civil or criminal investigative demand, or other order issued
or entered by a court or agency of competent jurisdiction; provided, however,
that SWBT shall not disclose Applicant's proprietary or confidential information
without first, at SWBT's option: (a) obtaining an agreed protective order or
nondisclosure agreement that preserves the confidential and proprietary nature
of Applicant's information; (b) seeking such a protective order as provided by
law if no agreed protective order or nondisclosure agreement can be obtained; or
(c) providing Applicant notice of the subpoena, demand, or order and an
opportunity to take affirmative steps of its own to protect such proprietary or
confidential information.

         28.07 Other Uses of Confidential Information. No other uses of
confidential information received from Applicant pursuant to this Agreement are
authorized or permitted without Applicant's express written consent.

                               ARTICLE 29: NOTICES

         29.01 Notices to Applicant. Except as otherwise provided in APPENDIX VI
("Notices to Applicant"), all written notices required to be given to Applicant
shall be delivered or mailed to Applicant's duly authorized agent or attorney,
as designated in this section.

                (a) Such notice may be delivered to Applicant's duly authorized
                    agent or attorney in person or by agent or courier receipted
                    delivery.

                (b) Such notice may be mailed to Applicant's duly authorized
                    agent or attorney by registered or certified mail, return
                    receipt requested.  When 

                                   PAGE 99
<PAGE>   388



                    notice is given by mail, such notice
                    shall be complete upon deposit of the notice, enclosed in a
                    postpaid, properly addressed wrapper, in a post office or
                    official depository under the care and control of the United
                    States Postal Service and shall be deemed to have been given
                    three days after the date of deposit.

                (c) Applicant may authorize delivery of the notice by telephonic
                    document transfer to the Applicant's duly authorized agent
                    or attorney. Notice by telephonic document transfer after
                    5:00 p.m. local time of the recipient shall be deemed given
                    on the following day.

                (d) Notices to Applicant shall be sent to the authorized agent
                    or attorney designated below:

                     Name:
                           ----------------------------------------------
                     Title:
                           ----------------------------------------------
                     Firm:
                           ----------------------------------------------
                     Address:
                              -------------------------------------------
                     City/State/Zip:
                                    -------------------------------------

         29.02 Notices to SWBT. Except as otherwise provided in APPENDIX VII
("Notices to SWBT"), all written notices required to be given to SWBT shall be
delivered or mailed to SWBT's duly authorized agent or attorney, as designated
in this section.

                (a) Such notice may be delivered to SWBT's duly authorized agent
                    or attorney in person or by agent or courier receipted
                    delivery.

                (b) Such notice may be mailed to SWBT's duly authorized agent or
                    attorney by registered or certified mail, return receipt
                    requested. When notice is given by mail, such notice shall
                    be complete upon deposit of the notice, enclosed in a
                    postpaid, properly addressed wrapper, in a post office or
                    official depository under the care and control of the United
                    States Postal Service and shall be deemed to have been given
                    three days after the date of deposit.

               (c)  SWBT may authorize delivery of the notice by telephonic
                    document transfer to SWBT's duly authorized agent or
                    attorney. Notice by telephonic document transfer after 5:00
                    p.m. local time of the recipient shall be deemed given on
                    the following day.

                                   PAGE 100
<PAGE>   389

               (d)  On the effective date of this Agreement, and until further
                    notice to Applicant, SWBT's duly authorized agent shall be
                    the Utility Liaison Supervisor ("ULS") designated in
                    APPENDIX VIII.

         29.03 Changes in Notice Requirements. Either party may, from time to
time, change notice addressees and addresses by giving written notice of such
change to the other party. Such notice shall state, at a minimum, the name,
title, firm, and full address of the new addressee.

                         ARTICLE 30: DISPUTE RESOLUTION

         30.01 Purpose. The provisions of this article are intended to minimize
litigation between the parties with respect to disputes arising in connection
with this Agreement and shall be construed accordingly. Any dispute between the
parties arising under this Agreement may be submitted by either party for
resolution under this article.

         30.02 Exclusive Remedy for Monetary Claims under $25,000. Except for
actions seeking injunctive relief related to the purposes of this Agreement or
suits to compel compliance with the dispute resolution processes set forth in
this article, the parties agree to use the dispute resolution processes set
forth in this Agreement as their sole remedy with respect to any monetary claim
of $25,000 or less which arises out of or in connection with this Agreement.

         30.03 Prerequisite to Litigation. The provisions of this article shall
also apply to all disputes, without regard to the amount in controversy, in
which Applicant contests charges billed by SWBT to Applicant under the terms of
this Agreement. No suit, except for actions seeking injunctive relief related to
the purposes of this Agreement or suits to compel compliance with the dispute
resolution processes set forth in this article, shall be filed by either party
against the other with respect to such contested charges until the parties have
engaged in good faith negotiations as provided in Section 30.04, and, if the
parties agree, in mediation under Section 30.05.

         30.04 Good Faith Negotiation. Good faith negotiation as provided in
this section shall be the first step in the dispute resolution process.

               (a)  With respect to any dispute subject to the provisions of
                    this article, either party may initiate negotiation
                    proceedings by writing a certified or registered letter to
                    the other party setting forth the particulars of the
                    dispute, the terms of the Agreement that are involved, and a
                    suggested resolution of the problem.

               (b)  The recipient of the letter shall respond within 21 days to
                    the proposed solution. The recipient shall either agree to
                    the proposed solution or explain its disagreement.

                                   PAGE 101
<PAGE>   390

               (c)  If the correspondence does not resolve the dispute, each
                    party, at the request of either party, will appoint a
                    knowledgeable, responsible representative to meet and
                    negotiate in good faith to resolve the dispute. The
                    location, form, frequency, duration, and conclusion of these
                    discussions shall be left to the discretion of the
                    representatives. Upon agreement, the representatives may
                    utilize other alternative dispute resolution procedures such
                    as mediation to assist in the negotiations.

               (d)  Discussions and correspondence among the representatives as
                    provided by this section are for purposes of settlement, are
                    exempt from discovery and production, and shall not be
                    admissible in arbitration, judicial, regulatory, or other
                    proceedings in any forum.

         30.05 Mediation. If the parties agree to mediation, the mediation may
be conducted as provided in this section or in such other manner as may be
mutually agreeable to the parties.

               (a)  If agreed to by the parties, the dispute shall be referred
                    to the nearest office of the American Arbitration
                    Association, or such other mediator as may be selected by
                    agreement of the parties, for mediation, that is, an
                    informal, non-binding conference or conferences between the
                    parties in which a mediator will seek to guide the parties
                    to a resolution of the dispute.

               (b)  If the dispute is referred to the American Arbitration
                    Association, the parties are free to select any mutually
                    acceptable panel member from the list of mediators at the
                    American Arbitration Association. If the parties cannot
                    agree or have no particular choice of a mediator and simply
                    request that the American Arbitration Association assign a
                    mediator to the dispute, then a list and resumes of
                    available mediators, numbering one more than there are
                    parties, will be sent to the parties, each of whom may
                    strike one name leaving the remaining name as the mediator.
                    If more than one name remains, the designated mediator shall
                    be selected by the Administrator of the American Arbitration
                    Association from the remaining names.

               (c)  Mediation sessions shall be private.

               (d)  All records, reports or other documents considered by the
                    mediator shall be confidential.

               (e)  The parties agree that the mediator shall not be compelled
                    to divulge confidential materials or to testify about the
                    mediation in arbitration, regulatory, judicial, or other
                    proceedings in any forum.

                                   PAGE 102
<PAGE>   391

               (f)  The parties agree to maintain the confidentiality of the
                    mediation and shall not rely on, or introduce as evidence in
                    any arbitration, judicial, or other proceeding:

                    (1)  views expressed or suggestions made by the other party
                         with respect to a possible settlement of the dispute;
                        
                    (2)  admissions made by the other party during the mediation
                         proceedings;

                    (3)  proposals made or views expressed by the mediator; or

                    (4)  the fact that the other party had or had not indicated
                         willingness to accept a proposal for settlement made by
                         the mediator.

               (g)  Subsections (e) and (f) of this section shall apply to
                    anything said, done or occurring in the course of the
                    mediation, including any private caucus or discussions
                    between the mediator and any party or counsel before or
                    after the joint mediation session. There shall be no
                    stenographic record of the mediation process, except to
                    memorialize a settlement record.

               (h)  The mediation process shall be considered settlement
                    negotiation for the purpose of all state and federal rules
                    protecting disclosures made during such conferences from
                    later discovery or use in evidence. All conduct, statements,
                    promises, offers, views, and opinions, oral or written, made
                    during the mediation by any party or a party's agent,
                    employee, or attorney are confidential and, where
                    appropriate, are to be considered work product and
                    privileged. Such conduct, statements, promises, offers,
                    views, and opinions shall not be subject to discovery or
                    admissible for any purpose, including impeachment, in any
                    litigation or other proceeding involving the parties;
                    provided, however, that evidence otherwise subject to
                    discovery or admissible is not excluded from discovery or
                    admission in evidence simply as a result of its having been
                    used in connection with this settlement process.

         30.06 Arbitration. If negotiations and mediations do not resolve the
dispute within 90 days after the initiation of dispute resolution proceedings as
provided in subsection (a) of Section 30.04 of this Agreement, the dispute shall
be submitted to binding arbitration by a single arbitrator pursuant to the
Commercial Arbitration Rules of the American Arbitration Association if the
dispute involves any monetary claim of $25,000 or less which arises out of or in
connection with this Agreement. The parties may voluntarily elect to arbitrate
disputes in which the amount in controversy exceeds $25,000, but they shall not
be required by this Agreement to do so.

                                   PAGE 103
<PAGE>   392

                (a) Either party may demand such arbitration in accordance with
                    the procedures set out in the Commercial Arbitration Rules.

                (b) Discovery shall be controlled by the arbitrator and shall be
                    permitted to the extent set out in this subsection.

                    (1)  Each party may submit in writing to any other party,
                         and such other party shall so respond, to a maximum of
                         any combination of 35 of the following:
                         interrogatories, document production requests, and
                         requests for admissions. The interrogatories, document
                         production requests, and requests for admissions shall
                         not have subparts.

                    (2)  Additional discovery may be permitted upon mutual
                         agreement of the parties or upon order of the
                         arbitrator on a showing of good cause.

                (c) The arbitrator shall control the scheduling so as to process
                    the matter expeditiously. The times set forth in this
                    subsection shall apply unless extended upon mutual agreement
                    of the parties or by the arbitrator on a showing of good
                    cause.

                    (1)  The arbitration hearing shall commence within 60 days
                         of the demand for arbitration and shall be held, in the
                         absence of agreement by the parties to a different
                         venue, in St. Louis, Missouri.

                    (2)  The parties shall submit written briefs five days
                         before the hearing.

                    (3)  The arbitrator shall rule on the dispute by issuing a
                         written opinion within 30 days after the close of
                         hearings.

                    (4)  The arbitrator shall have no authority to order
                         punitive or consequential damages.

                    (5)  Judgment upon the award rendered by the arbitrator may
                         be entered in any court of competent jurisdiction.

         30.07 Costs. Except as specifically provided in this section, each
party shall bear its own costs of all dispute resolution procedures under this
article.

               (a)  A party seeking discovery shall reimburse the responding
                    party for the costs incurred by the responding party in
                    producing documents.

               (b)  The parties shall equally split the fees of the arbitration
                    and the arbitrator.

                                   PAGE 104
<PAGE>   393

         30.08 No Abridgment of Rights under the Communications Act of 1934 or
the Pole Attachment Act. Nothing contained in this article shall abridge the
rights of either party to seek relief from the FCC with respect to any dispute
subject to the jurisdiction of the FCC under the Communications Act of 1934 or
the Pole Attachment Act, or from the State Commission with respect to any
dispute subject to its jurisdiction, except that the parties may not seek relief
from the FCC or the State Commission with respect to any dispute that has
already been resolved by mediation under Section 30.05 or by binding arbitration
under Section 30.06.

                        ARTICLE 31: ACCESS TO APPLICANT'S
                    POLES, DUCTS, CONDUITS, AND RIGHTS-OF-WAY

         31.01 No Reciprocal Access to Applicant's Facilities. This Agreement
does not include provisions for reciprocal access by SWBT to Applicant's poles,
ducts, conduits, and rights-of-way.

                        ARTICLE 32: GENERAL PROVISIONS

         32.01 Entire Agreement. This Agreement, together with the
interconnection agreement, if any, to which this Agreement is an appendix,
attachment, or exhibit, sets forth the entire understanding and agreement of the
parties.

         32.02 Prior Agreements Superseded. This Agreement supersedes all prior
agreements and understandings, whether written or oral, between Applicant and
SWBT relating to the placement and maintenance of Applicant's facilities on and
within SWBT's poles, ducts, and conduits within this State.

         32.03 Amendments Shall Be in Writing. Except as otherwise specifically
provided to the contrary by other provisions of this Agreement, the terms and
conditions of this Agreement shall not be amended, changed or altered except in
writing and with approval by authorized representatives of both parties.

         32.04 Survival of Obligations. Any liabilities or obligations of either
party for acts or omissions prior to the termination of this Agreement, any
obligations of either party under provisions of this Agreement relating to
confidential and proprietary information, indemnification, limitations of
liability, and any other provisions of this Agreement which, by their terms, are
contemplated to survive (or be performed after) termination of this Agreement,
will survive the termination of this Agreement.

         32.05  Multiple Counterparts.  This Agreement may be executed in 
multiple counterparts.

         32.06 Effect on Licenses Issued Under Prior Agreements. All currently
effective pole attachment and conduit occupancy licenses granted to Applicant
shall, on the 

                                   PAGE 105
<PAGE>   394

effective date of this Agreement, be subject to the rates, terms,
conditions, and procedures set forth in this Agreement.

         32.07 Force Majeure. Except as otherwise specifically provided in this
Agreement, neither party will be liable for any delay or failure in performance
of any part of this Agreement caused by a Force Majeure condition, including
acts of the United States of America or any state, territory, or political
subdivision thereof, acts of God or a public enemy, fires, floods, disputes,
freight embargoes, earthquakes, volcanic actions, wars, civil disturbances,
cable cuts, or other causes beyond the reasonable control of the party claiming
excusable delay or other failure to perform; provided, however, that Force
Majeure will not include acts of any governmental authority relating to
environmental, health, or safety conditions at work locations. If any Force
Majeure condition occurs, the party whose performance fails or is delayed
because of such Force Majeure condition will give prompt notice to the other
party, and, upon cessation of such Force Majeure condition, will give like
notice and commence performance hereunder as promptly as reasonably practicable.

         32.08 Severability. If any article, section, subsection, or other
provision or portion of this Agreement is or becomes invalid under any
applicable statute or rule of law, and such invalidity does not materially alter
the essence of this Agreement as to either party, the invalidity of such
provision shall not render this entire Agreement unenforceable and this
Agreement shall be administered as if it did not contain the invalid provision.

         32.09 Choice of Law. Except to the extent that federal law controls any
aspect of this Agreement, the validity of this Agreement, the construction and
enforcement of its terms, and the interpretation of the rights and duties of the
parties will be governed by the laws of this State, applied without regard to
the provisions of this State's laws relating to conflicts-of-laws.

         32.10 Changes in the Law. Because the primary purpose of this Agreement
is to provide access to poles, ducts, conduits, and rights-of-way in accordance
with the Pole Attachment Act, as amended by the Telecommunications Act of 1996
and subsequent amendments, the parties contemplate that changes in this
Agreement may from time to time be necessary or desirable to conform to changes
in the Pole Attachment Act as that Act is amended, interpreted, and applied.
This Agreement is based in large part on regulatory decisions by the FCC, which
has jurisdiction over the rates, terms, and conditions of access to poles,
ducts, conduits, and rights-of-way (except to the extent that such jurisdiction
has been pre-empted by individual states) and decisions by the State Commission.
More specifically, this Agreement is based in large part on the FCC's First
Interconnection Order in CC Docket No. 96-98, on FCC rules announced with the
First Interconnection Order, and on Arbitration Orders by the State Commission.

                [   ] Applicant desires to have access to SWBT's poles, ducts,
                      conduits, and rights-of-way on terms that are not less
                      favorable than those obtained by firms participating in
                      interconnection arbitration 

                                   PAGE 106
<PAGE>   395
                      proceedings before the State Commission. Applicant also
                      desires to have access to SWBT's poles, ducts, conduits,
                      and rights-of-way to the full extent permitted under the
                      FCC's First Interconnection Order in CC Docket No. 96-98.
                      SWBT is entering into this Agreement for the purpose of
                      providing nondiscriminatory access in compliance with the
                      Pole Attachment Act and regulatory decisions thereunder,
                      including decisions by the State Commission in
                      interconnection arbitration proceedings in which Applicant
                      is not a party. Each party is entering into this Agreement
                      based on current interpretations of the law by the FCC and
                      State Commission. In the event of any changes in the Pole
                      Attachment Act, changes in applicable FCC or State
                      Commission rulings, or judicial determinations that such
                      rulings are erroneous or invalid, each party shall, at the
                      request of the other, engage in good faith negotiations to
                      supplement, amend or replace any provisions of this
                      Agreement affected by such changes or determinations and
                      to conform this Agreement to changes in the underlying
                      laws on which the Agreement is based.

                [   ] This Agreement has been entered into as a result of
                      private negotiation between the parties and arbitration by
                      the State Commission, acting pursuant to the
                      Telecommunications Act of 1996. If the actions of any
                      legislative bodies, courts, or regulatory agencies of
                      competent jurisdiction invalidate, modify, or stay the
                      enforcement of laws, rules, regulations, or commission
                      orders that were the basis for a provision of this
                      Agreement (including but not limited to any provision of
                      this Agreement required by any arbitration award approved
                      by the State Commission), the affected provision shall be
                      invalidated, modified, or stayed as required by action of
                      the legislative body, court, or regulatory agency. In the
                      event of such a change in the law, each party shall expend
                      diligent efforts to arrive at an agreement respecting the
                      modifications to the Agreement required by the law or
                      requested in good faith by the other party. If
                      negotiations fail, disputes between the parties concerning
                      interpretation of the actions required or provisions
                      affected by such governmental actions shall be resolved
                      pursuant to the dispute resolution process provided for in
                      the interconnection agreement or this Agreement; provided,
                      however, that this section shall not be construed as
                      precluding either party from seeking appropriate relief
                      from the FCC in connection with the parties' rights and
                      obligations under the Pole Attachment Act. In the event of
                      any material change in the law, each party agrees to enter
                      into good faith negotiations to conform this Agreement to
                      the changes in the law.



                                   PAGE 107
<PAGE>   396


THIS AGREEMENT CONTAINS A BINDING ARBITRATION PROVISION WHICH MAY BE ENFORCED BY
THE PARTIES.

SOUTHWESTERN BELL TELEPHONE COMPANY

By:
   -----------------------------------------------------------------------
       Signature of SWBT's Authorized Officer/Employee

   -----------------------------------------------------------------------
       Name of SWBT's Authorized Officer/Employee (Printed or Typed)

   -----------------------------------------------------------------------
       Position/Title of SWBT's Authorized Officer/Employee

   -----------------------------------------------------------------------
       Date

   -----------------------------------------------------------------------
       City and State of Execution by SWBT




Applicant's Name (Printed or Typed)

By:
   -----------------------------------------------------------------------
       Signature of Applicant's Authorized Officer/Employee

   -----------------------------------------------------------------------
       Name of Authorized Officer/Employee (Printed or Typed)

   -----------------------------------------------------------------------
       Position/Title of Authorized Officer/Employee

   -----------------------------------------------------------------------
       Date

   -----------------------------------------------------------------------
       City and State of Execution by Applicant


                                   PAGE 108

<PAGE>   397
                                             Agreement No. 
                                                          ---------------------

                                   APPENDIX I
         SCHEDULE OF RATES, FEES AND CHARGES (KANSAS) - PAGE 1 OF 4

         This Appendix is an integral part of the Master Agreement for Access to
Poles, Ducts, Conduits, and Rights-of-Way to which it is attached and sets forth
the rates, fees and charges to be paid by Applicant to SWBT pursuant to the
Master Agreement and licenses subject to the Master Agreement. The rates, fees,
and charges set forth in this Appendix shall be subject to all applicable laws,
rules, regulations, and commission orders as provided in Section 19.01 of the
Master Agreement and shall be subject to revision as provided in Section 19.12
of the Master Agreement.

A)       Pole Attachment Fees

         1)       General

                  a)       For billing purposes, pole attachments shall be
                           considered i) to have commenced on the first to occur
                           of the following dates: the date of assignment (or
                           provisional assignment) of pole attachment space, the
                           date a license for such pole attachment is issued, or
                           the date of actual attachment and ii) to have ended
                           on the last to occur of the following dates: the date
                           Applicant's assignment lapses or is relinquished, the
                           date of actual removal of the attached facilities
                           from SWBT's pole, or the date of termination of
                           Applicant's license.

                  b)       Fees shall be payable semiannually in advance on the
                           first days of January and July and shall be prorated
                           on a daily basis as provided in Section 19.04. Fees
                           for pole attachments shall be based on the number of
                           pole attachments as of the date of billing. If
                           Applicant occupies more than one usable space on a
                           pole, separate attachment fees shall apply to each
                           space occupied. For billing purposes, a single pole
                           attachment includes the point of attachment and all
                           facilities located in the usable space on the pole in
                           the space assigned to Applicant (typically six inches
                           above and six inches below the point of attachment),
                           together with routine ancillary apparatus such as
                           anchors, anchor/guy strands, drive rings, J-hooks,
                           dead-end clamps, and other apparatus which does not
                           interfere with the ability of SWBT to occupy or
                           assign usable space on the pole other than the usable
                           space licensed to Applicant. Fees for pole space
                           assignments and unauthorized pole attachments shall
                           be billed in the same manner as if a license had been
                           issued.

         2)       Fees (1997 Rates)
<TABLE>
<CAPTION>

                  Semiannual Pole Attachment Fees                    Annual    Semiannual
                  -------------------------------                    ------    ----------
<S>                                                                    <C>       <C>
                  Per pole attachment (cable service only)             $1.75     $0.875
                                                                       -----     ------
                  Per pole attachment (telecommunications carriers)    $1.75     $0.875
                                                                       -----     ------
                  Per pole attachment (other)                          $ N/A     $ N/A
                                                                       -----     ------   
</TABLE>

<PAGE>   398


                                   APPENDIX I
           SCHEDULE OF RATES, FEES AND CHARGES (KANSAS) - PAGE 2 OF 4


B)       Conduit Occupancy Fees

         1)       General

                  a)       For billing purposes, conduit occupancy shall be
                           considered to have i) begun on the first to occur of
                           the following dates: the date of assignment (or
                           provisional assignment) of conduit occupancy space,
                           the date a license for such conduit occupancy is
                           issued, or the date of actual occupancy; and ii)
                           ended on the last to occur of the following dates:
                           the date Applicant's assignment lapses or is
                           relinquished, the date of actual removal of the
                           attached facilities from SWBT's conduit, or the date
                           of termination of Applicant's license. Occupancy ends
                           when facilities have been removed from SWBT's conduit
                           system and required post-removal procedures (e.g.,
                           plugging ducts) have been completed. Fees for
                           conduit space assignments and unauthorized conduit
                           occupancy shall be billed in the same manner as if a
                           license had been issued.

                  b)       Fees shall be payable semiannually in advance on the
                           first days of January and July.

         (2)      Fees (1997 Rates)


<TABLE>
<CAPTION>
                  Semiannual Per Foot Conduit Occupancy Fees            Annual          Semiannual
                  ------------------------------------------           ---------        ----------
                 <S>                                                  <C>               <C>
                  Full duct/duct foot (cable service only)             $ 0.41/ft        $ 0.205/ft
                                                                       ---------        ----------
                  Full duct/duct foot (telecommunications carriers)    $ 0.41/ft        $ 0.205/ft
                                                                       ---------        ----------
                  Full duct/duct foot (other)                          $ N/A            $ N/A
                                                                       ---------        ----------
                  Half duct/duct foot (cable service only)*            $0.205/ft        $0.1025/ft
                                                                       ---------        ----------
                  Half duct/duct foot (telecommunications carriers)*   $0.205/ft        $0.1025/ft
                                                                       ---------        ----------
                  Half duct/duct foot (other)*                         $ N/A            $ N/A
                                                                       ---------        ----------
                    *Each inner duct is billed at the half duct rate
</TABLE>

                  a)       Facility footage shall be measured i) from the center
                           of one manhole to the center of an adjacent manhole
                           if the facility runs between two manholes, ii) from
                           the center of a manhole to the end of a duct not
                           terminated in a manhole, or iii) from the center of a
                           manhole to the property line if the duct is connected
                           at the property line to a duct owned and controlled
                           by a third-party property owner.

                  b)       Semiannual full duct conduit occupancy fees will
                           apply to the first facility placed in a previously
                           unoccupied duct except as provided in c)-d) below.

                  c)       If two or more facilities occupy a duct that has not
                           been subdivided by inner duct, a semiannual half duct
                           conduit occupancy fee will be charged for each

<PAGE>   399

                                   APPENDIX I
           SCHEDULE OF RATES, FEES AND CHARGES (KANSAS) - PAGE 3 OF 4


                           facility placed in the duct.

                  d)       A semiannual half duct occupancy fee will apply to
                           the first facility placed by Applicant in a
                           previously unoccupied duct that has not been
                           subdivided by inner duct if and only if the presence
                           of Applicant's facility does not render the other
                           half of the duct unusable by others.

                  e)       When Applicant's facilities are installed within
                           inner duct, a single semiannual half duct conduit
                           occupancy fee will apply to each inner duct occupied.

C)       Application Fees. No application fees shall be charged for the
         submission of access applications or provisional space assignments.

D)       Pre-license Survey Work. Charges for pre-license survey work are not
         set on a fixed fee basis and will be determined on a case-by-case. If
         pre-license survey work is performed by SWBT's contractors, Applicant
         shall reimburse SWBT for the actual out-of-pocket costs incurred by
         SWBT for such work. If pre-license survey work is performed by SWBT
         employees, pre-license survey charges shall be computed by multiplying
         the applicable hourly rates times the number of hours reasonably spent
         by SWBT's employees on pre-license survey work.

E)       Facilities Modification, Capacity Expansion, and Make-ready Work.
         Charges for facilities modification, capacity expansion, and make-ready
         work are not set on a fixed fee basis and will be determined in a
         case-by-case basis. In all cases, except as otherwise specifically
         provided to the contrary in the Master Agreement, such charges shall
         include the costs of materials required to perform the work. If such
         work is performed by SWBT's contractors, Applicant shall reimburse SWBT
         for the actual out-of-pocket costs incurred by SWBT for such work. If
         such work is performed by SWBT employees, charges for such work shall
         be computed by multiplying the applicable hourly rates times the number
         of hours reasonably spent by SWBT's employees on the work. Except as
         otherwise specifically provided in other parts of this Agreement,
         Applicant will pay half of SWBT's estimated charges at 50 percent job
         completion and the remainder at 100 percent completion. SWBT may, at
         its election, require Applicant to pay SWBT's out-of-pocket costs for
         materials as those costs are incurred and may require Applicant to pay
         outside contractor costs on the same schedule SWBT pays such outside
         contractors. Bills and invoices submitted by SWBT to Applicant for
         make-ready charges shall be due and payable 30 days after the date of
         the bill or invoice.

F)       Construction Inspectors. Subject to all applicable commission orders,
         where work is being performed on Applicant's behalf in SWBT's manholes
         or other portions of SWBT's conduit system by persons other than
         contractors approved by SWBT or qualified employees of Applicant,
         Applicant shall pay SWBT's costs attributable to having a construction
         inspector present; provided, however, that SWBT shall not charge
         Applicant for more than one such construction inspector per site at any
         given time. If the construction inspector is a SWBT contractor,
         Applicant shall reimburse SWBT for the actual out-of-

<PAGE>   400

                                   APPENDIX I
           SCHEDULE OF RATES, FEES AND CHARGES (KANSAS) - PAGE 4 OF 4


         pocket costs incurred by SWBT in connection with the presence of such
         inspector. If the construction inspector is a SWBT employee, charges
         for the construction inspector shall be computed by multiplying the
         applicable hourly rate times the number of hours reasonably spent by
         the employee as a construction inspector in connection with the
         project.

G)       Other Work Performed Pursuant to the Master Agreement. For all other
         work performed by SWBT's contractors pursuant to this Agreement,
         including but not limited to work performed in opening manholes and
         participating in work operations at Applicant's request, Applicant
         shall reimburse SWBT for the actual out-of-pocket costs incurred by
         SWBT in connection with the performance of such work. For all other
         work performed by SWBT's employees pursuant to this Agreement,
         including but not limited to work performed in opening manholes,
         providing access to and copies of records, and participating in work
         operations at Applicant's request, SWBT's charges shall be computed by
         multiplying the applicable hourly rates times the number of hours
         reasonably spent by SWBT's employees on such work.

H)       Contract Administration Fee and Administrative Record-keeping Fees. A
         one time contract administration fee of $250.00 shall be due and
         payable at the time of the execution of the Master Agreement. SWBT may
         charge administrative record-keeping fees not exceeding $125.00 in
         connection with records and billing changes resulting from the sale,
         consolidation, or other transfer of Applicant's business or facilities,
         name changes, and the like. SWBT shall provide Applicant, on
         Applicant's request, a statement of the basis for the fees, as ordered
         by the State Commission.

I)       Other Administrative and Ancillary Fees. No other administrative or
         ancillary fees are charged by SWBT on a fixed fee basis.

J)       Hourly Rates. Except as otherwise provided by any applicable law, rule,
         regulation, or commission order, hourly rates charged for SWBT
         employees shall be such employees' fully loaded hourly rates.

K)       Payment Date. For fees and charges other than charges for make-ready
         work, each bill or invoice submitted by SWBT to Applicant shall state
         the date that payment is due, which date shall be not less than 60 days
         after the date of the bill or invoice. For make-ready work, the payment
         due date shall be not less than 30 days after the date of the bill or
         invoice. Interest on past due charges shall accrue as provided in
         Section 19.1l(a) of the Master Agreement.

<PAGE>   401

                                              Agreement No.
                                                            -------------------
                                   APPENDIX II
                      IDENTIFICATION OF APPLICANT (KANSAS)

         This Appendix is an integral part of the Master Agreement for Access to
Poles, Ducts, Conduits, and Rights-of-Way to which it is attached.

Applicant's legal name is:
                          ----------------------------------------------------
Applicant's principal place of business is located in the State of
- -.
- ------------------------------------------------------------------------------
Applicant does business under the following assumed names:
- -
- ------------------------------------------------------------------------------
Applicant is:
- -
- ------------------------------------------------------------------------------

[  ] a corporation organized under the laws of the State of
     charter no.                 ;                         -------------------
                -----------------                 

[  ] a partnership organized under the laws of the State of 
     or                                                    -------------------

[  ] another entity, as follows: 
                                 ---------------------------------------------
Applicant represents that Applicant is:

[  ] (1) a cable system (as defined in 47 U.S.C. Sections 153(37) and
         522(7)) seeking a pole attachment or conduit occupancy license solely
         to provide cable service (as defined in 47 U.S.C. Section 522(6);

[  ] (2) a telecommunications carrier, as defined in 47 U.S.C. Section 153(49),
         as modified by 47 U.S.C. Section 224; or

[  ] (3) a person or entity which is neither (1) nor (2) above, as
         follows:

<PAGE>   402
                                                   Agreement No._______________

                                  APPENDIX II
                      IDENTIFICATION OF APPLICANT (KANSAS)

               _______________________________________________

<PAGE>   403

                                                  Agreement No.________________ 

                                  APPENDIX III
                    ADMINISTRATIVE FORMS AND NOTICES (KANSAS)

         This Appendix is an integral part of the Master Agreement for Access to
Poles, Ducts, Conduits, and Rights-of-Way to which it is attached and contains
administrative forms referred to in the Master Agreement or used in connection
with the provision of access to SWBT's poles, ducts, conduits, and
rights-of-way. The forms are forms presently in use and have not been conformed
to the Master Agreement. The forms may be further revised by SWBT to conform to
the Master Agreement and revised from time to time to reflect changes in the
applicable law, changes in the Master Agreement, and changes in the procedures
through which access to poles, ducts, conduits, and rights-of-way is afforded by
SWBT to Applicant and others.

         SW-9433:  Pole Attachments

         SW-9434:  Access Application and Make-Ready Authorization

         SW-9435:  Conduit Occupancy

         SW-9436A: Notification of Surrender or Modification of Pole 
                   Attachment License by Licensee

         SW-9436B: Notification of Surrender or Modification of Conduit 
                   Occupancy License by Applicant

         SW-9436C: Notification of Unauthorized Attachments by Applicant



<PAGE>   404
                          SOUTHWESTERN BELL TELEPHONE
                                POLE ATTACHMENTS
[SWBT Logo]



<TABLE>
<CAPTION>
Retention Period:  Active, Plus 5 Years
FIRM'S NAME: _____________________                      Pole Attachments                               PAGE ______ OF ________
AGREEMENT No.: ___________________          [ ] Provisional, Records Based Assignment                  TYPE: __________________
APPLICATION No.: _________________                  [ ] Pre-Occupancy Survey                               (CATV, Telecom, Other)

- ------------------------------------------------------------------------------------------------------------------------------------
<S><C>
Item      Record    Pole      Ownership        Street     Proposed    Guy     Make Ready    Make Ready        Pole Mntd
- ------------------------------------------------------------------------------------------------------------------------------------
  #         #         #        SWBT or        Address    Attachment   Rq'd       Work       Description       Apparatus
- ------------------------------------------------------------------------------------------------------------------------------------
                               Power                       Height    Y or N    Y or N                         Height   
- ------------------------------------------------------------------------------------------------------------------------------------
1
- ------------------------------------------------------------------------------------------------------------------------------------
2
- ------------------------------------------------------------------------------------------------------------------------------------
3
- ------------------------------------------------------------------------------------------------------------------------------------
4
- ------------------------------------------------------------------------------------------------------------------------------------
5
- ------------------------------------------------------------------------------------------------------------------------------------
6
- ------------------------------------------------------------------------------------------------------------------------------------
7
- ------------------------------------------------------------------------------------------------------------------------------------
8
- ------------------------------------------------------------------------------------------------------------------------------------
9
- ------------------------------------------------------------------------------------------------------------------------------------
10
- ------------------------------------------------------------------------------------------------------------------------------------
11
- ------------------------------------------------------------------------------------------------------------------------------------
12
- ------------------------------------------------------------------------------------------------------------------------------------
13
- ------------------------------------------------------------------------------------------------------------------------------------
14
- ------------------------------------------------------------------------------------------------------------------------------------
15
- ------------------------------------------------------------------------------------------------------------------------------------
16
- ------------------------------------------------------------------------------------------------------------------------------------
17
- ------------------------------------------------------------------------------------------------------------------------------------
18
- ------------------------------------------------------------------------------------------------------------------------------------
19
- ------------------------------------------------------------------------------------------------------------------------------------
20
- ------------------------------------------------------------------------------------------------------------------------------------
          TOTAL
- ------------------------------------------------------------------------------------------------------------------------------------

- ------------------------------------------------------------------------------------------------------------------------------------

- ------------------------------------------------------------------------------------------------------------------------------------
                    Number of Cables             ________________                         Other Notes: ____________________________
- ------------------------------------------------------------------------------------------------------------------------------------
                    Weight/per ft. and Size/O.D. ________________                         _________________________________________
- ------------------------------------------------------------------------------------------------------------------------------------
                    Number and Types of Strands  ________________                         _________________________________________
- ------------------------------------------------------------------------------------------------------------------------------------

                                                   Date:___________________________________
SIGNED: ______________________________             Time:___________________________________        SIGNED: _______________________
 SWBT Representative                               [ ] Official File Copy, If Checked in Red       Applicant's Representative
</TABLE>



<PAGE>   405




                                     SW9433
                                POLE ATTACHMENTS
                               FORM INSTRUCTIONS

From SW9433 may be used for the following two purposes, Provisional, Records
Based Assignment or as the Pre-Occupancy Survey.  The applicant may complete
the SW9433 and submit this to SWBT while reviewing the records and make a
Provisional, Records Based Assignment.  The applicant will also use this form
when making the Pre-Occupancy Survey as a reference sheet of information
required for acquiring pole attachment space

REQUIRED INFORMATION FOR PROVISIONAL, RECORDS BASED ASSIGNMENT

FIRM'S NAME:  Name of firm requesting pole attachment space.

AGREEMENT No.:  Number obtained from the Master Agreement Number.

APPLICATION No.:  Will be provided by applicant in sequential ascending order.

[  ]  Provisional, Records Based Assignment:  Applicable when an applicant
elects to a Provisional, Records Based Assignment.  The form will be signed and
dated at the bottom by both the applicant and the SWBT representative.  A copy
will be provided to the applicant and the original will be maintained by SWBT.

Type:  The applicant states that they are a CATV, a Telecommunications Carrier
or a firm other than the aforementioned two.

Record #:  The SWBT paper record or the SWBT mechanized record number.

Pole #:  Applicant will supply the pole number either from the SWBT Records or
from a field visit.

Ownership:  Applicant will determine and post the ownership of the pole by
marking S for SWBT or P for Power Company based on SWBT's records.

Street Address:  Applicant will provide street address or geographical
reference point of the pole.

Proposed Attachment Height:  Applicant will provide the proposed attachment
height in feet and inches on the pole.

Guy Rq'd:  Not required for Provisional, Records Based assignment.

Make Ready Work:  Not required for Provisional, Records Based assignment.

Make Ready Description:  Not required for Provisional, Records Based
assignment.

Pole Mntd Apparatus Height:  Not required for Provisional, Records Based
assignment.

Weight/per ft. and Size/O.D.:  Applicant will provide.

Number and Types of Strands:  Applicant will provide the number and types of
strands.

Other Notes:  Any other notes relevant to the request including any infrequent
construction techniques.

Date:  The date the Provisional, Records Based Assignment was made.

Time:  The time the Provisional, Records Based Assignment was made.

Signed (Applicant's Representative):  Applicant's Representative signs that the
Provisional, Records Based Assignment was made.

Signed (SWBT Representative):  SWBT's Representative signs that the
Provisional, Records Based Assignment was made.


<PAGE>   406




REQUIRED INFORMATION FOR PRE-OCCUPANCY SURVEY

FIRM'S NAME:  Name of firm requesting pole attachment space.

AGREEMENT No.:  Number obtained from the Master Agreement Number.

APPLICATION No.:  Will be provided by SWBT.

[  ]  Pre-Occupancy Survey:  This would be checked when this form is being used
as a Pre-Occupancy Survey.  The form would be completed in its entirety and
signed by the applicant and submitted to SWBT for review in obtaining pole
attachment space.

Type:  The applicant states that they are a CATV, a Telecommunications Carrier
or a firm other than the aforementioned two.

Record #:  The SWBT paper record or mechanized record number.

Pole #:  Applicant will supply the pole number either from the SWBT Records or
from a field visit.

Ownership:  Applicant will determine and post the ownership of the pole by
marking S for SWBT or P for Power Company.

Street Address:  Applicant will provide street address or geographical
reference point of the pole.

Proposed Attachment Height:  Applicant will provide the proposed attachment
height in feet and inches on the pole.

Guy Rq'd:  Applicant will state if a guy is required.  (Yes or No).

Make Ready Work:  Applicant will state it make ready work is required.
(Yes or No)

Make Ready Description:  Applicant will give description of make ready work
required.

Pole Mntd Apparatus Height:  Applicant will state any proposed apparatus that
would be placed on the pole.  (Terminal, etc.)

Number of Cables:  Applicant will state the number of cables that will be
placed on the pole.

Weight/per ft. and Size/O.D.:  Applicant will provide.

Number and Types of Strands:  Applicant will provide the number and types of
strands.

Other Notes:  Any other notes relevant to the request including any infrequent
construction techniques.

Date:  The date the Pre-Occupancy Survey was submitted to SWBT.

Time:  The time the Pre-Occupancy Survey was submitted to SWBT.

Signed (Applicant's Representative):  Applicant's Representative signs when
Pre-Occupancy was submitted to SWBT.

Signed (SWBT Representative):  SWBT's Representative signs when Pre-Occupancy
Survey was submitted to SWBT.


<PAGE>   407






<TABLE>
<S>                   <C>                   <C>                   <C>                      <C>
SOUTHWESTERN BELL TELEPHONE                                       ACCESS APPLICATION AND MAKE-READY
                                                                  AUTHORIZATION
Retention Period: Active, plus 5 years                            (Request for Access to Poles, Ducts, Conduit)
Name of Applicant______________________________________________________________
Agreement No._________________________________________________________________
Application No.________________________________________________________________
                                              Provisional Assignment
- ------------------------------------------------------------------------------------------------------------------
As specified in the attached documents, and in accordance with the terms and conditions of the Master Agreement
between SWBT and Applicant, application is hereby made for a provisional assignment of space in anticipation of a
nonexclusive license of communication facilities to access the quantity of SWBT facilities indicated below:

______  SWBT poles               _____  Feet SWBT Whole Duct               _______ SWBT Innerduct
                                                                  
Applicant desires immediate assignment of space and acknowledges that the effective date is ____________________.
Applicant agrees to provide an application for assignment/access/occupancy of the assigned space when 30 days
from the date of the assignment, or forfeit the assignment.
Expiration Date:___________________
                                           Assignment/Access/Occupancy
- ------------------------------------------------------------------------------------------------------------------
As specified in the attached documents, and in accordance with the terms and conditions of the Master Agreement
between SWBT and Applicant, application is hereby made for occupancy of space through a nonexclusive license of
communication facilities to access the quantity of SWBT facilities indicated below:

______  SWBT poles               ______   Feet SWBT Whole Duct              _____ Feet SWBT Innerduct

Application authorizes SWBT to perform the required pre-licensing survey including any field inspections required
to evaluate capacity, safety, reliability, and engineering standards; and to determine the cost, if any, of
required modifications or make-ready work.
Expiration Date:_____________________
- ------------------------------------------------------------------------------------------------------------------

Applicant's Estimated Construction Start Date:________________________

Applicant's Estimated Construction Completion Date:___________________

                      Authorized by Applicant:________________________________________
                                                   Signature                Title
                                         Date:____________________________

- ------------------------------------------------------------------------------------------------------------------
                                   Make-Ready Work
                                   ---------------              
Estimated Costs                         Hours                     Rate                     Total

Constr. Labor                           _____            X        $____________            $____________
Material                                _XXX_            X        $_____XXX____            $____________
Engr. Design                            _____            X        $____________            $____________
                 Total                                                                     $____________
Estimated SWBT Completion Date
[ ] No Make-Ready Work Required.                                         [ ] No Make-Ready Work Required under 8.03(a)
[ ] Make-Ready Work will be completed by applicant's authorized contractor.
[ ] I authorize SWBT to complete the required make-ready work.  Payments due upon 50% completion and 100%
    completion.  Costs will be based upon actual costs incurred by SWBT.  (This may vary depending on state)

___________________________________________________           Date:_____________________________
Applicant's Signature                     Title
- ------------------------------------------------------------------------------------------------------------------
License No._____________________________            Authorized by SWBT:___________________________________________
Date:_________________________                                         Signature                          Time
                                                [ ] Official File Copy, If Checked In Red
</TABLE>



<PAGE>   408




                                    SW-9434
                ACCESS APPLICATION and MAKE-READY AUTHORIZATION
                               FORM INSTRUCTIONS
                                     5/5/97

Form SW-9434 is used to request access to poles, ducts, and conduit; to
transmit notice of Provisional Assignments; and to provide other information
required in the access process.

REQUIRED INFORMATION

NAME OF APPLICANT.  Name of firm requesting space on poles or in conduit.

AGREEMENT NO.  Number obtained from the Master Agreement Number.

APPLICATION NO.  Will be provided by applicant in sequential ascending order.

PROVISIONAL ASSIGNMENT BOX DATA

     "ATTACHED DOCUMENTS"  Copies of the Assignment Of Space Logs showing the
     applicant's entries for the requested space or completed Forms SW-9433 or
     SW-9435 if appropriate.  Assignment is not official until the required
     data is entered in the Assignment Of Space Log.

     ______ SWBT POLES The number of poles for which space is requested.

     ______ FEET SWBT WHOLE DUCT The accumulated Center-to-Center measurements
            for the Whole Duct to be occupied.  To be used ONLY FOR CABLES TOO
            LARGE IN DIAMETER (Typically copper conductor cables.) to fit in 
            SWBT standard innerduct

     ______ FEET SWBT INNERDUCT The accumulated Center-to-Center measurements
            for the innerduct to be occupied.

     EFFECTIVE DATE IS date entered in Assignment Of Space Log

     PROVISIONAL ASSIGNMENT EXPIRATION DATE:  30 calendar days from the date
          entered in the Assignment of Space Log (i.e., Date Application must
          be submitted to hold the assignment of space.)

ASSIGNMENT/ACCESS/OCCUPANCY BOX DATA

"ATTACHED DOCUMENTS"  Completed Forms SW-9433 and/or SW-9435.

     ______ SWBT POLES The number of poles to be accessed.

     ______ FEET SWBT WHOLE DUCT  The accumulated Center-to-Center measurements
            for the Whole Duct to be occupied.  To be used ONLY FOR CABLES TOO
            LARGE IN DIAMETER (Typically copper conductor cables.) to fit in
            SWBT standard innerduct

     ______ FEET SWBT INNERDUCT The accumulated Center-to-Center
            measurements for the innerduct to be occupied.

     EFFECTIVE DATE IS date entered in Assignment Of Space Log

     ASSIGNMENT EXPIRATION DATE:  12 Months from the date entered in Assignment
          Of Space Log (Date facilities must be placed to avoid forfeiture of
          assigned space.)

                                    Page 1
<PAGE>   409




                                    SW-9434
                ACCESS APPLICATION and MAKE-READY AUTHORIZATION
                               FORM INSTRUCTIONS
                                     5/5/97

APPLICANT'S ESTIMATED CONSTRUCTION START DATE:  Current "best estimate" of the
date project construction will begin.  "ASAP" IS NOT AN ACCEPTABLE DATE.

APPLICANT'S ESTIMATED CONSTRUCTION COMPLETION DATE:  Current "best estimate" of
the date placements and splicing will be completed.  "ASAP" IS NOT AN
ACCEPTABLE DATE.

AUTHORIZED BY APPLICANT:  Signature and Title of the Applicant's representative
authorizing the request for access and payment (if am) of related SWBT
engineering charges in connection with such access.

DATE:  Date of authorization by Applicant's representative.

MAKE-READY WORK Box Data

     ESTIMATED COSTS:  SWBT will calculate data for Construction Labor,
     Material, and Engineering Design hours and summarize the TOTAL estimated
     SWBT Make-Ready Costs.

     ESTIMATED SWBT COMPLETION DATE SWBT Engineering will provide the estimated
     completion date of SWBT Make-Ready Work based upon current scheduling
     loads.

     [  ]  NO MAKE-READY WORK REQUIRED.  Applicant should check this box if it
     has determined that fully code/specifications-compliant access can be
     granted without any work or modifications by SWBT or other parties.  If
     inner duct must be placed, box should not be checked.

     [  ]  MAKE-READY WORK WILL BE COMPLETED BY APPLICANT'S AUTHORIZED
     CONTRACTOR.  If Applicant plans to utilize a mutually approved contractor
     to perform all the Make-Ready work, this box only should be checked.

     [  ]  I AUTHORIZE SWBT TO COMPLETE THE REQUIRED MAKE-READY WORK....  If
     Applicant wants SWBT to perform all the Make-Ready Work, this box only
     should be checked.

     IF SOME MAKE-READY WORK MUST BE DONE BY SWBT AND SOME WILL BE DONE BY THE
     APPLICANT'S AUTHORIZED CONTRACTOR, THE LAST TWO BOXES SHOULD BE CHECKED.
     A DETAILED DESCRIPTION OF THE WORK TO BE DONE BY SWBT MUST BE INCLUDED.

     APPLICANT'S SIGNATURE, TITLE AND DATE:

          It the No Make-Ready Work Required box is checked by Applicant,
          Applicant's Signature confirms the accuracy of the current Applicant
          construction schedule.  If the Not Make-Ready Work Required under
          8.03(a) box is checked, Applicant confirms conditions under 8.03
          Immediate Occupancy apply.

          If Make-Ready Work will be completed by Applicant's Authorized
          contractor is checked, Applicant's signature concurs with any changes
          in proposed Make-Ready work identified by SWBT and confirms the
          accuracy of the current schedule.

          If SWBT will perform any Make-Ready Work, Applicant's signature
          authorizes payment to SWBT of actual cost to perform the required
          make-ready work.

LICENSE NO.__________ AUTHORIZED BY SWBT:  The SWBT State ULS will authorize,
     date, and issue the License No. on the SW-9434 which becomes the 
     Applicant's License For Access.


                                    Page 2
<PAGE>   410





[SWBT Logo] Southwestern Bell Telephone



<TABLE>
<S><C> 
Retention Period:  Active, Plus 5 Years             
FIRM'S NAME:_________________________________                         Conduit Occupancy                       PAGE_______  OF_____
AGREEMENT NO.:_______________________________             [ ] Provisional, Records Based Assignment           TYPE:_______________
APPLICATION NO.:_____________________________                     [ ] Pre-Occupancy Survey                    (CATV, Telecom, Other)
- ------------------------------------------------------------------------------------------------------------------------------------
Item     Oper.    Record      Manhole        Street     Distance To     Proposed       Make Ready             Make Ready
- ------------------------------------------------------------------------------------------------------------------------------------
    #        #        #          #           Address    Next Manhole     Duct or          Work                Description
- ------------------------------------------------------------------------------------------------------------------------------------
                                                        (Ctr to Ctr)    Innerduct        Y or N
- ------------------------------------------------------------------------------------------------------------------------------------
1
- ------------------------------------------------------------------------------------------------------------------------------------
2
- ------------------------------------------------------------------------------------------------------------------------------------
3
- ------------------------------------------------------------------------------------------------------------------------------------
4
- ------------------------------------------------------------------------------------------------------------------------------------
5
- ------------------------------------------------------------------------------------------------------------------------------------
6
- ------------------------------------------------------------------------------------------------------------------------------------
7
- ------------------------------------------------------------------------------------------------------------------------------------
8
- ------------------------------------------------------------------------------------------------------------------------------------
9
- ------------------------------------------------------------------------------------------------------------------------------------
10
- ------------------------------------------------------------------------------------------------------------------------------------
11
- ------------------------------------------------------------------------------------------------------------------------------------
12
- ------------------------------------------------------------------------------------------------------------------------------------
13
- ------------------------------------------------------------------------------------------------------------------------------------
14
- ------------------------------------------------------------------------------------------------------------------------------------
15
- ------------------------------------------------------------------------------------------------------------------------------------
16
- ------------------------------------------------------------------------------------------------------------------------------------
17
- ------------------------------------------------------------------------------------------------------------------------------------
18
- ------------------------------------------------------------------------------------------------------------------------------------
19
- ------------------------------------------------------------------------------------------------------------------------------------
20
- ------------------------------------------------------------------------------------------------------------------------------------
TOTAL
- ------------------------------------------------------------------------------------------------------------------------------------
       Number of Cables______________                    Splice Information Manhole #___________________ , Details__________________
- ------------------------------------------------------------------------------------------------------------------------------------
       Size of Cable (O.D. Inches)_______________        Splice Information Manhole #___________________ , Details__________________
- ------------------------------------------------------------------------------------------------------------------------------------
                                                         Slack Loop Info. Manhole   #___________________ , Details__________________
- ------------------------------------------------------------------------------------------------------------------------------------
                                                         Slack Loop Info. Manhole   #___________________ , Details__________________
- ------------------------------------------------------------------------------------------------------------------------------------
                                                Date:________________________
SIGNED:_________________________________        Time:________________________              SIGNED:__________________________________
       SWBT Representative                                                                                Applicant's Representative
                                          [ ] Official File Copy, If Checked in Red
</TABLE>




<PAGE>   411




                                     SW9435
                               CONDUIT OCCUPANCY
                               FORM INSTRUCTIONS

From SW9435 may be used for the following two purposes.  Provisional, Records
Based Assignment or as the Pre-Occupancy Survey.  The applicant may complete
the SW9435 and submit this to SWBT while reviewing the records and make a
Provisional, Records Based Assignment.  The applicant will also use this form
when making the Pre-Occupancy Survey as a reference sheet of information
required for acquiring duct and/or inner duct space.

REQUIRED INFORMATION FOR PROVISIONAL, RECORDS BASED ASSIGNMENT

FIRM'S NAME:  Name of firm requesting conduit space.

AGREEMENT No.:  Number obtained from the Master Agreement Number.

APPLICATION No.  Will be provided by applicant in sequential ascending order.

[  ]  Provisional, Records Based Assignment:  Applicable when an applicant
would make a Provisional, Records Based Assignment.  The form will be signed
and dated at the bottom by both the applicant and the SWBT representative.  A
copy will be provided to the applicant and the original will be maintained by
SWBT.

Type:  Applicant indicates that they are a CATV, a Telecommunications Carrier
or a firm other than the aforementioned two.

Record #:  This would refer to either the SWBT paper record or the SWBT
mechanized record number.

Manhole #:  Applicant will supply each manhole number.

Street Address:  Applicant will provide street address of the manhole, if
applicable.

Proposed Duct or Inner duct:  Applicant will state the number of ducts and/or
inner ducts.

Make Ready Work:  Not required for Provisional, Records Based assignment.

Make Ready Description:  Not required for Provisional, Records Based
assignment.

Number of Cables:  Applicant will enter the number of cables.

Size of Cable (O.D.  Inches):  Applicant will enter size of cable.

Splice Information Manhole #:  Not required for Provisional, Records Based
assignment.

Slack Loop Info.  Manhole #:  Not required for Provisional, Records Based
assignment.

Details:  Not required for Provisional, Records Based assignment.

Date:  The date the Provisional, Records Based Assignment was made.

Time:  The time the Provisional, Records Based Assignment was made.

Signed (Applicant's Representative): Applicant's Representative signs that the
Provisional, Records Based Assignment was made.

Signed (SWBT Representative):  SWBT's Representative signs that the
Provisional, Records Based Assignment was made.


<PAGE>   412



REQUIRED INFORMATION FOR PRE-OCCUPANCY SURVEY

FIRM'S NAME:  Name of firm requesting conduit space.

AGREEMENT No.:  Number obtained from the Master Agreement Number.

APPLICATION No.:  Will be provided by applicant in sequential ascending order.

[  ]  Pre-Occupancy Survey:  Applicable when this form is being used as a Pre
Occupancy Survey.  The form would be completed in its entirety and signed by
the applicant and submitted to SWBT for review in obtaining conduit space.

Type:  The applicant states that they are a CATV, a Telecommunications Carrier
or a firm other than the aforementioned two.

Oper. #:  Applicant will provide the operation number when required.  The same
operation number may very well be referenced on an attached map.

Record #:  This would refer to either the SWBT paper record or mechanized
record number.

Manhole #:  Applicant will supply each manhole number.

Street Address:  Applicant will provide street address of the manhole, if
applicable.

Distance to Manhole:  Applicant will state the distance from manhole to manhole
in feet.

Proposed Duct or Inner Duct:  Applicant will state the number of ducts and/or
inner ducts.

Make Ready Work:  Applicant will state if make ready work is required.  
(Yes or No)

Make Ready Description:  Applicant will give description of make ready work
required.

Number of Cables:  Applicant will indicate the number of cables.

Size of Cable (O.D. Inches):  Applicant will indicate size of cable.

Splice Information Manhole #:  Applicant will enter any relevant splice
information.

Details:  Applicant will provide any relevant details regarding splice
information.

Slack Loop Info. Manhole #:  Applicant will provide.

Details:  Applicant will provide any relevant Slack Loop Information.

Date:  The date the Pre-Occupancy Survey was submitted to SWBT.

Time:  The time the Pre-Occupancy Survey was submitted to SWBT.

Signed (Applicant's Representative):  Applicant's Representative signs when
Pre-Occupancy was submitted to SWBT.

Signed (SWBT Representative):  SWBT's Representative signs when Pre-Occupancy
Survey was submitted to SWBT.


<PAGE>   413






[SWBT LOGO] Southwestern Bell                                           SW-9436A
            Telephone                                                (Rev. 5-89)
                                                             Ref.  002-011-900SW

                   NOTIFICATION OF SURRENDER OR MODIFICATION
                     OF POLE ATTACHMENT LICENSE BY LICENSEE


                                                              Page ____ of _____

                                                  Agreement Number______________
                                          
                                                 _______________________________
                                                 (Licensee)
                                                 _______________________________
                                                 (Address)
                                                 _______________________________


     Southwestern Bell Telephone Company:

     In accordance with the terms and conditions of the License Agreement
     between us, dated_______________ , 19__, notice is hereby given that the 
     licenses covering attachments to the following poles and/or anchors
     and/or utilization of anchor/guy strand is surrendered (or modified as
     indicated in Licensee's prior notification to Licensor, dated
     ___________________, 19___) effective_______________________.


<TABLE>
<CAPTION> 
   ---------------------------------------------------------------------------------------------------------------------------------
                                                                                                                DATE FAC.
                       ANCHOR  A/GS                                                                             RMVD. OR 
   POLE NO.          (ASSOC. POLE NO.)          LIC. NO. & DATE          SURRENDEER OR MODIFICATION             MODIFIED
   ---------------------------------------------------------------------------------------------------------------------------------
<S><C>
1.
   ---------------------------------------------------------------------------------------------------------------------------------
2.
   ---------------------------------------------------------------------------------------------------------------------------------
3.
   ---------------------------------------------------------------------------------------------------------------------------------
4.
   ---------------------------------------------------------------------------------------------------------------------------------
5.
   ---------------------------------------------------------------------------------------------------------------------------------
6.
   ---------------------------------------------------------------------------------------------------------------------------------
7.
   ---------------------------------------------------------------------------------------------------------------------------------
8.
   ---------------------------------------------------------------------------------------------------------------------------------
9.
   ---------------------------------------------------------------------------------------------------------------------------------
10.
   ---------------------------------------------------------------------------------------------------------------------------------
11.
   ---------------------------------------------------------------------------------------------------------------------------------
12.
   ---------------------------------------------------------------------------------------------------------------------------------
13.
   ---------------------------------------------------------------------------------------------------------------------------------
14.
   ---------------------------------------------------------------------------------------------------------------------------------
15.
   ---------------------------------------------------------------------------------------------------------------------------------

- --------------------------------------------------
Date Notification Received _____________________                     _________________________________________________
Date Modification Accepted _____________________                                     Name of  Licensee
By _____________________________________________
Discontinued:                                                           By _________________________________________
                        Poles __________________
                        Anchors_________________                        Title ______________________________________
                Anchor/Guy Strands______________                                        
- -------------------------------------------------- 
</TABLE>



<PAGE>   414



[SWBT LOGO]
Southwestern Bell
Telephone


                         NOTIFICATION OF SURRENDER OR MODIFICATION
                         OF CONDUIT OCCUPANCY LICENSE BY APPLICANT


                                                              Page ____ of _____
License Agreement #________________
                                                       _________________________
                                                       (Applicant)

                                                       _________________________
                                                       (Address)
                                              
                                                       _________________________

SOUTHWESTERN BELL TELEPHONE COMPANY:

In accordance with the terms and conditions of the Licensing Agreement between
us, dated_______________ , 19__, notice is hereby given that the licenses 
covering occupancy of the following conduit are surrendered (or modified
as indicated in Applicant's prior notification to SWBT, dated
___________________, 19___,) effective________________________ .


<TABLE>
<CAPTION>
   ---------------------------------------------------------------------------------------------------------------------------------
<S><C>
                                                                                                                 DATE
                                                                                                                 FAC. RMVD. 
     CONDUIT LOCATION                   LIC. NO. & DATE                 SURRENDER OR MODIFICATION                OR MODIFIED
   ---------------------------------------------------------------------------------------------------------------------------------
1.
   ---------------------------------------------------------------------------------------------------------------------------------
2.
   ---------------------------------------------------------------------------------------------------------------------------------
3.
   ---------------------------------------------------------------------------------------------------------------------------------
4.
   ---------------------------------------------------------------------------------------------------------------------------------
5.
   ---------------------------------------------------------------------------------------------------------------------------------
6.
   ---------------------------------------------------------------------------------------------------------------------------------
7.
   ---------------------------------------------------------------------------------------------------------------------------------
8.
   ---------------------------------------------------------------------------------------------------------------------------------
9.
   ---------------------------------------------------------------------------------------------------------------------------------
10.
   ---------------------------------------------------------------------------------------------------------------------------------
11.
   ---------------------------------------------------------------------------------------------------------------------------------
12.
   ---------------------------------------------------------------------------------------------------------------------------------
13.
   ---------------------------------------------------------------------------------------------------------------------------------
14.
   ---------------------------------------------------------------------------------------------------------------------------------
15.
   ---------------------------------------------------------------------------------------------------------------------------------

   --------------------------------------------------------------
               Date Notification Received ____________________                           _______________________________________
      S        Date Modification Accepted ____________________                                        (Applicant)
      W        By ____________________________________________
      B                                                                               By  ______________________________________
      T        Discontinued:__________________________________                                  (Name of Authorized Agent)
                                Total duct footage____________                        Title ____________________________________
   --------------------------------------------------------------                               (Title of Authorized Agent)
</TABLE>





<PAGE>   415



[SWBT LOGO]
Southwestern Bell
Telephone


                                                    NOTIFICATION OF UNAUTHORIZED
                                                        ATTACHMENTS BY APPLICANT



Applicant Name__________________________


In accordance with the terms and conditions of the License Agreement between
us, dated____________ , 19__, notice is hereby given that the license covering 
attachments to the following is unauthorized (as indicated in
Applicant's prior agreement to SWBT, dated ______________________,  19___,)
effective__________________________ .


                                                     SOUTHWESTERN BELL
                                                     TELEPHONE

                                                     By:________________________

                                                     Title:_____________________


<TABLE>
<CAPTION>
   ---------------------------------------------------------------------------------------------------------------------------------
<S><C>
          POLE NO.                 LOCATION                                                                            DATE FAC. 
             OR                (ASSOC. POLE NO.)                                                                       RMVD. OR
          CONDUIT #            MANHOLES Involved            LIC. NO. & DATE             UNAUTHORIZED ATTACHMENT        MODIFIED
   ---------------------------------------------------------------------------------------------------------------------------------
1.
   ---------------------------------------------------------------------------------------------------------------------------------
2.
   ---------------------------------------------------------------------------------------------------------------------------------
3.
   ---------------------------------------------------------------------------------------------------------------------------------
4.
   ---------------------------------------------------------------------------------------------------------------------------------
5.
   ---------------------------------------------------------------------------------------------------------------------------------
6.
   ---------------------------------------------------------------------------------------------------------------------------------
7.
   ---------------------------------------------------------------------------------------------------------------------------------
8.
   ---------------------------------------------------------------------------------------------------------------------------------
9.
   ---------------------------------------------------------------------------------------------------------------------------------
10.
   ---------------------------------------------------------------------------------------------------------------------------------
11.
   ---------------------------------------------------------------------------------------------------------------------------------
12.
   ---------------------------------------------------------------------------------------------------------------------------------
13.
   ---------------------------------------------------------------------------------------------------------------------------------
14.
   ---------------------------------------------------------------------------------------------------------------------------------
15.
   ---------------------------------------------------------------------------------------------------------------------------------


   ---------------------------                                                                ______________________________________
     SKETCH OF                                                                                          (Name of Applicant)
     UNAUTHORIZED                                                         
     ATTACHMENTS                                                                             By  ___________________________________
     ATTACHED                                                             

     Date Notification                                                    
     Sent_____________                                                                       Title  ________________________________
   ---------------------------                                            
</TABLE>               





<PAGE>   416





                                                       Agreement No. ___________

                                  APPENDIX IV
                  INSURANCE REQUIREMENTS (KANSAS)--PAGE 1 OF 4

     This Appendix IV is an integral part of the Master Agreement for Access to
Poles, Ducts, Conduits, and Rights-of-Way to which it is attached.

     1)  Premises.  As used in this Appendix, the term "premises" refers to any
site located on, within, or in the vicinity of SWBT's poles, ducts, conduits,
or rights-of-way and any location where Applicant or any person acting on
Applicant's behalf may be physically present while traveling to or departing
from any such site.

     2)  Requirements Applicable to Applicant and All Persons and Entities
Acting on Applicant's Behalf.  Applicant shall maintain, at all times during
the term of this Master Agreement, all insurance and coverages set forth below.
Such insurance and coverages shall not only cover Applicant but all
contractors, subcontractors, and other persons or entities acting on
Applicant's behalf at the premises described in 1) above.  Applicant should
require that all contractors, subcontractors, and other persons or entities
acting on Applicant's behalf at premises described in 1 ) above obtain the same
insurance and coverages.

     3)  Workers' Compensation Insurance.  Applicant shall maintain, at all
times during the term of this Agreement, Workers' Compensation Insurance and
Employer's Liability Insurance with minimum limits of $100,000 for bodily
injury-each accident, $100,000 for bodily injury by disease-each employee, and
$500,000 for bodily injury by disease-policy limits, for all employees
performing work or otherwise present on the premises described in 1) above.
Such insurance must comply with the Workers' Compensation laws of this State
and shall provide coverage, at a minimum, for all benefits required by such
Worker's Compensation laws.  Applicant shall require any contractor,
subcontractor, or other person or entity acting on Applicant's behalf to
provide Workers' Compensation Insurance and Employer's Liability Insurance for
their respective employees unless such employees are covered by the protection
afforded by Applicant.

     4)  General Liability Insurance.  To protect SWBT and any joint user from
any liability for bodily injury or property damage, Applicant shall maintain,
at all times during the term of this Agreement, General Liability insurance
satisfactory to SWBT.  SWBT shall be added as an additional insured in the
standard policy or an endorsement thereto.  Applicant shall also require any
contractor, subcontractor, or other person or entity acting on Applicant's
behalf to provide General Liability coverage with the same limits and with SWBT
added as an additional insured unless such contractor, subcontractor, or other
person or entity is covered by the General Liability protection afforded by
Applicant.

          a)   The following coverages must be included in (and may
               not be excluded from) the policy or policies obtained to satisfy
               the General Liability insurance requirements of Applicant and
               any contractor, subcontractor, or other person or entity acting
               on Applicant's behalf.  The coverages may be provided by the
               standard policy or endorsements thereto.  Exclusion endorsements
               deleting these coverages will not be accepted.


<PAGE>   417

                                  APPENDIX IV
                  INSURANCE REQUIREMENTS (KANSAS)--PAGE 2 OF 4


            1)   Personal Injury and Advertising Injury coverage.

            2)   Premises/Operations coverage, including also
                 coverage for any newly acquired ownership or controlled
                 premises or operations.

            3)   Independent Contractors coverage to provide
                 protection for Applicant's contractors, subcontractors, and
                 other persons or entities acting on Applicant's behalf.

            4)   Explosion, Collapse, and Underground Hazard
                 (XCU) coverage.

            5)   Completed Operations coverage providing for
                 bodily injury and property damage liabilities which may occur
                 once the operations have been completed or abandoned.

            6)   Contractual Liability coverage to provide
                 financial responsibility for the Applicant to meet its
                 indemnification obligations.

            7)   Broad Form Property Damage (BFPD) coverage for
                 damage to property in the care or custody of Applicant and
                 damage to work performed by or on behalf of the Applicant.

        b)  Minimum policy limits shall be as follows:

            General Aggregate Limit:  $1,000,000.

            Sublimit for all bodily injury, property damages, or medical
            expenses incurred in any one occurrence:  $1,000,000.

            Sublimit for personal injury and advertising:  $1,000,000.
            
            Products/Operations Aggregate Limit:  $1,000,000.

            Each occurrence sublimit for Products/Operations:
            $1,000,000.

        c) No coverage shall be deleted from the standard
           policy without notification of individual exclusions being
           attached for review and acceptance.

        d) Policy language or endorsements adding SWBT as an
           additional insured shall not include exclusions or exceptions
           which defeat the purpose of protecting SWBT


<PAGE>   418

                                  APPENDIX IV
                  INSURANCE REQUIREMENTS (KANSAS)--PAGE 3 OF 4



           from any liability for bodily injury or property
           damage arising out of Applicant's operations.

     5)  Automobile Liability insurance.  The parties contemplate that
Applicant and personnel acting on Applicant's behalf will utilize automobiles,
trucks, and other motor vehicles on public and private property, including
public rights of way, in the vicinity of SWBT's poles, ducts, conduits, and
rights-of-way.  Accordingly, Applicant shall maintain, at all times during the
term of this Agreement, Automobile Liability insurance with minimum limits of
$1,000,000 combined single limits per occurrence for bodily injury and property
damage which may arise out of the operation or use of motor vehicles of any
type.  Coverage shall extend to "any auto" -- that is, coverage shall be
extended to all owned, non-owned, and hired vehicles used by Applicant or by
any person or entity acting on Applicant's behalf in connection with any work
performed, or to be performed, on, within, or in the vicinity of SWBT's poles,
ducts, conduits, or rights-of-way.

     6)   Layering of General Liability and Automobile Liability coverages. 
Applicant's insurance may be written via a primary policy with either an excess
or umbrella form over the primary policy.  If coverage is written in this
manner, the total of the combined policy limits must meet or exceed the minimum
limits specified in this Agreement.

     7)  Deductibles.  No deductibles shall be allowed without the express
written consent of SWBT.

     8)  Claims Made Policies.  Claims Made Policies will not be accepted.

     9)  Proof of Insurance.  Certificates of Insurance stating the types of
insurance and policy limits provided the insured, or other proof of insurance
satisfactory to SWBT, must be received by SWBT prior to the issuance of any
licenses pursuant to this Agreement and before Applicant or any person acting
on Applicant's behalf performs any work on the premises described in 1) above.

          a)   Certificates of Insurance using the insurance
               industry standard ACORD form are preferred.

          b)   Certificates provided with respect to General
               Liability policies and certificates provided with respect to
               Automobile Liability policies shall indicate SWBT as an
               Additional Insured.

          c)   Deductibles, if permitted, shall be listed on the
               Certificate of Insurance.

          d)   The cancellation clause on the certificate of
               insurance shall be amended to read as follows:


<PAGE>   419

                                  APPENDIX IV
                  INSURANCE REQUIREMENTS (KANSAS)--PAGE 4 OF 4



                "SHOULD ANY OF THE ABOVE DESCRIBED POLICIES BE CANCELLED
                OR MATERIALLY CHANGED BEFORE THE EXPIRATION DATE, THE
                ISSUING COMPANY WILL MAIL 30 DAYS WRITTEN NOTICE TO THE
                CERTIFICATE HOLDER NAMED TO THE LEFT."

             A certificate which does not include the phrase "or materially
             changed" does not meet SWBT's requirements.  A certificate
             reciting that the issuing company will "endeavor to" mail 30 days
             written notice to the certificate holder does not meet SWBT's
             requirements.  The language "but failure to mail such notice shall
             impose no obligation or liability of any kind upon the company,
             its agents, or representatives" or similar language must be
             deleted from the certificate.

          e)   The certificate holder shall be:

               Southwestern Bell Telephone Company
               500 E. 8th, Room 598
               Kansas City, Missouri 64106
                  ATTENTION:  Utility Liaison Supervisor

          f)   Failure to object to any coverage described in a
               certificate shall not constitute written permission from SWBT to
               any variance from or alteration of any requirement set forth in
               this Appendix and shall not be construed as a waiver by SWBT of
               any rights under this Agreement.

     10)  Rating of Insurers.  SWBT requires that companies affording insurance
coverage have a B+VII or better rating, as rated in the current A.M. Best Key
Rating Guide for Property and Casualty Insurance Companies.

     11)  Self-insurance.  If authorized in the Master Agreement,
self-insurance shall be allowed in lieu of the above requirement s upon
Applicant's submission of proof that it has met the self-insurance requirements
stated in the Master Agreement.


<PAGE>   420





                                                       Agreement No. ___________

                                   APPENDIX V
                 NONDISCLOSURE AGREEMENT (KANSAS) -- PAGE  1 OF 4

      Nondisclosure Agreement (SWBT Pole, Duct, Conduit, and Right-of-Way)

     This Nondisclosure Agreement, effective as of the _____ day of
____________, 19__, has been entered into by and between Southwestern Bell
Telephone Company ("SWBT"), a Missouri corporation, and the undersigned person
or firm ("Recipient") as a condition of access to certain records and
information maintained by SWBT.  The parties stipulate and agree as follows:

     1)  SWBT maintains records and information, including but not limited to
outside plant engineering and construction records, which relate to poles,
ducts, conduits, and rights-of-way which SWBT owns or controls.  SWBT
represents that such records and information are not made generally available
for inspection or copying by the public and include business, economic, and
engineering information (including but not limited to plans, designs, maps,
diagrams, cable counts and cable-specific information, circuit records, and
other competitively sensitive information) which SWBT intends to keep secret
and which has economic value by virtue of not being generally known to or
readily ascertainable by the public, including SWBT's competitors.

     2)  SWBT has agreed to make certain of its records and information
relating to poles, ducts, conduits, and rights-of-way available to cable
television systems and telecommunications carriers who are presently entitled
under federal law to have access to the poles, ducts, conduits, and
rights-of-way owned or controlled by SWBT.

     3)  Recipient represents that Recipient is a cable television system or
telecommunications carrier entitled under federal law to access to poles, ducts,
conduits, and rights-of-way owned or controlled by SWBT, or, if an individual,
that he or she is acting on behalf of_________________________________________ ,
which is such a cable television system or telecommunications carrier. 
Recipient further represents that Recipient is seeking access to SWBT's records
and information relating to poles, ducts, conduits, and rights-of-way for the
limited purpose of enabling engineering and construction personnel employed by
or acting on behalf of such cable television system or telecommunications
carrier to make engineering and construction decisions necessary to utilize
SWBT's poles, ducts, conduits, and rights-of-way.

     4)  SWBT agrees that permitted uses of records and information concerning
SWBT's poles, ducts, conduits, and rights-of-way are (a) determining which
poles, ducts, conduits, and rights-of-way owned or controlled by SWBT are
available for use by such cable television systems or telecommunications
carriers as permitted by federal law, (b) designing, engineering, constructing,
installing, maintaining, and removing equipment which is to be attached to or
placed within such poles, ducts, conduits, and rights-of-way, and (c)
contesting decisions, if any, by SWBT not to provide access to such poles,
ducts, conduits, and rights-of-


<PAGE>   421

                                  APPENDIX V
                NONDISCLOSURE AGREEMENT (KANSAS) -- PAGE  2 OF 4


way as requested.  No other uses of such records or information are authorized
or permitted under this Agreement.

     5)  Recipient agrees that Recipient will not use, or permit any other
person or entity to use or have access to SWBT's records and information
relating to poles, ducts, conduits, or rights-of-way or information for any
purpose other than the limited purposes stated in 4) above and that such
records and information shall not be disclosed or shared with any person or
persons other than those who have a need to know such information for such
limited purposes.  Recipient specifically agrees that such records and
information shall not be used or accessed by any person involved in sales,
marketing, competitive intelligence, competitive analysis, strategic planning,
and similar activities.  Recipient further agrees that Recipient shall not
furnish copies of such records or disclose information contained in such
records to any person or entity which has not executed and delivered to SWBT a
counterpart of this Agreement prior to receipt of such copies or information.

     6)  Recipient agrees that Recipient will not without SWBT's express
written authorization copy, duplicate, sketch, draw, photograph, download,
photocopy, scan, replicate, transmit, deliver, send, mail, communicate, or
convey any of SWBT's records relating to poles, ducts, conduits, or
rights-of-way.  Recipient further agrees that Recipient will not conceal,
alter, or destroy any SWBT records furnished to Recipient pursuant to this
Agreement.

     7)  Notwithstanding the provisions of 6) above, and except as provided in
8) below, Recipient may copy, take notes from, make, and use (for the limited
purposes specified herein) drawings with reference to the following records
provided by SWBT to Recipient for inspection:  pole and conduit route maps,
cable plat maps, and plant location records reflecting approximate locations of
SWBT's existing poles, ducts, conduits, and rights-of-way.  All such copies,
notes, and drawings (whether in hardcopy or electronic form) shall be marked
with the legend:  "PROPRIETARY INFORMATION:  NOT FOR USE BY OR DISCLOSURE TO
ANY PERSON WHO HAS NOT EXECUTED A NONDISCLOSURE AGREEMENT (SWBT POLE, DUCT,
CONDUIT, AND RIGHT-OF-WAY)."

     8)  No references to cable counts, cable designations or cable-specific
information, circuit information, or customer-specific information of any kind
may be included in any copies, notes, or drawings made pursuant to 7) above;
provided, however, that Recipient may make estimates regarding the physical
characteristics (such as size and weight) of the cables being surveyed when
necessary to make engineering determinations regarding the capacity, safety,
reliability, or suitability of SWBT's poles, ducts, conduits, or rights-of-way
for Recipient/Applicant's intended uses.


<PAGE>   422

                                  APPENDIX V
                NONDISCLOSURE AGREEMENT (KANSAS) -- PAGE  3 OF 4


     9)  All records and information relating to poles, ducts, conduits, and
rights-of-way provided to Recipient/Applicant by SWBT (whether in writing,
orally, or in electronic or other formats) shall be deemed to be proprietary
information subject to this Agreement without regard to whether such
information, at the time of disclosure, has been marked with restrictive
notations such as "Proprietary," "Restricted Proprietary," "Confidential," "Not
to Be Copied or Reproduced," or the like.

     10)  This Agreement applies only to records and information provided to
Recipient by SWBT and does not apply to records and information obtained by
Recipient from other lawful sources.

     11)  This Agreement does not prohibit the disclosure of records or
information in response to subpoenas and/or orders of a governmental agency or
court of competent jurisdiction.  In the event Recipient receives an agency or
court subpoena requiring such disclosure, Recipient shall immediately, and in
no event later than five calendar days after receipt, notify SWBT in writing.

     12)  The Parties agree that, in the event of a breach or threatened breach
of this Agreement, SWBT may seek any and all relief available in law or in
equity as a remedy for such breach, including but not limited to monetary
damages, specific performance, and injunctive relief.  The Parties acknowledge
that SWBT's records and information relating to poles, ducts, conduits, and
rights-of-way include valuable and unique information and that disclosure of
such information (including circuit information) will result in irreparable
injury to SWBT.  In the event of any breach of this Agreement for which legal
or equitable relief is sought, SWBT shall be entitled to recover from Recipient
all reasonable attorney's fees and other reasonable costs (including but not
limited to fees of expert witnesses) incurred by SWBT in connection with the
prosecution of its claims against Recipient.

     13)  This Agreement shall be effective on the effective date shown above
and shall remain in full force and effect until terminated by either party as
provided herein.  Either party may, at any time, with or without cause,
terminate this Agreement by giving the other party 60 days' advance written
notice of its decision to terminate.  The parties further agree that
termination of this Agreement shall have no effect on the duty of any person or
entity, including Recipient, to abide by all terms of this Agreement with
respect to records and information received by Recipient while this Agreement
is in effect.

     14)  This Agreement shall benefit and be binding on the parties below and
their respective heirs, successors, and assigns.

     15)  This Agreement will be governed by the laws of the State of Kansas.


<PAGE>   423
                                  APPENDIX V
                NONDISCLOSURE AGREEMENT (KANSAS) -- PAGE  1 OF 4




     16)  This Agreement sets forth the entire agreement and understanding
between the parties with respect to the subject matter hereof, and none of the
terms of this Agreement may be amended or modified except by written instrument
signed by both parties.

     IN WITNESS WHEREOF, the parties hereto have executed this Agreement, or
caused this Agreement to be executed by their duly authorized representatives,
in duplicate, as of the dates set forth below.

<TABLE>
<S>                                                            <C>                                         
__________________________________________                     Southwestern Bell Telephone Company         
Recipient (Print or Type Name)                                                                             
                                                                                                           
By________________________________________                     By________________________________          
  Signature of Recipient or Representative                       Signature                                 
                                                                                                           
__________________________________________                     __________________________________          
Name (Printed or Typed)                                        Name (Printed or Typed)                     
                                                                                                           
__________________________________________                     __________________________________          
Address                                                        Address                                     
                                                                                                           
__________________________________________                     __________________________________          
City, State, and Zip Code                                      City, State, and Zip Code                   
                                                                                                           
__________________________________________                     __________________________________          
Phone                                                          Phone                                       
                                                                                                           
__________________________________________                     __________________________________          
Date                                                           Date                                        
</TABLE>



<PAGE>   424





                                           Agreement No.________________________

                                  APPENDIX VI
                         NOTICES TO APPLICANT (KANSAS)

     This Appendix is an integral part of the Master Agreement for Access to
Poles, Ducts, Conduits, and Rights-of-Way to which it is attached.

     Notices in general.  Except as otherwise stated in this Appendix, all
notices to Applicant shall be given to Applicant's duly authorized agent or
attorney as specified in Section 29.01 of the Master Agreement.

     Changes in notice requirements.  Changes in the notice requirements set
forth in this Appendix may be made by Applicant from time to time in accordance
with the provisions of Section 29.03 of the Master Agreement.

     Special notice provisions.  The following special notice provisions, if
any, shall apply:


<PAGE>   425




                                           Agreement No.________________________

                                 APPENDIX VII
                   NOTICES TO SWBT (KANSAS) -- PAGE 1 OF 3

     This Appendix is an integral part of the Master Agreement for Access to
Poles, Ducts, Conduits, and Rights-of-Way to which it is attached.

     Utility Liaison Supervisor (ULS).  Except as otherwise stated in this
Appendix, all notices to SWBT shall be given to the Utility Liaison Supervisor
(ULS) designated in APPENDIX VIII of the Master Agreement.  The Utility Liaison
Supervisor is generally responsible for coordinating applications for access to
SWBT's poles, ducts, conduits, and rights-of-way and serving as Applicant's
initial point of contact for matters arising out of or in connection with the
administration of the Master Agreement.  Notices to the ULS shall be given in
writing in the manner prescribed in Section 29.02.  Notices to be sent to the
ULS include, but are not limited to, notices under the following provisions of
the Master Agreement.


<TABLE>
            <S>                             <C>                                                                               
            7.01                              Notification of Designation of Primary Point of Contact                         
                                                                                                                              
            7.03(a)                           Notification of intent to review records                                        
                                                                                                                              
            8.XX                              All Notifications in Article 8                                                  
                                                                                                                              
            9.XX                              All Notifications in Article 9                                                  
                                                                                                                              
            10.04(e)                          Notification Regarding Make-Ready Work                                          
                                                                                                                              
            12.03(d)                          Notification of placing J-hook on non-licensed pole                             
                                                                                                                              
            12.04                             Notification of occupation of maintenance duct for short-term use               
                                                                                                                              
            12.06                             Notification of Applicant's maintenance contact                                 
                                                                                                                              
            13.01                             Notification of planned modifications                                           
                                                                                                                              
            14.02(c)                          Notification of Applicant's desire to add to or modify its existing attachment  
                                                                                                                              
            15.02(b)                          Notification of occupation of maintenance duct for short-term emergency use     
                                                                                                                              
            15.03                             Notification of emergency repair coordinators                                   
                                                                                                                              
            16.01                             Notification that facilities have been brought into compliance                  
                                                                                                                              
            17.02(c)                          Disclaimer of ownership or responsibility for untagged facilities               
                                                                                                                              
            17.06                             Notification of Applicant's response to ownership of facilities in question     
</TABLE>



<PAGE>   426
                                 APPENDIX VII
                   NOTICES TO SWBT (KANSAS) -- PAGE 2 OF 3


<TABLE>
          <S>                               <C>
            18.01(a)                          Notice of intent to remove facilities
            
            18.01(e)                          Notice of intent to terminate license
            
            18.06                             Notification of completion of removal of facilities
            
            20.01(c)                          Notification of change of bond
            
            21.17                             Notification of claims
            
            23.XX                             All notifications of insurance coverage in Article 23
            
            24.03                             Notification of assignment
            
            25.01                             Notification of termination
            
            25.03                             Notification of cure of breach
            
            27.04                             Notice of elective termination
            
            29.03                             Notification of change in notice requirements
</TABLE>
            
        
        Other notices.  The following notices may be given orally or in writing
(including fax) and shall be given to SWBT's Local Service Provider Center
(LSPC) at 1-800-486-5598 instead of the ULS.
            
            
<TABLE>
            <S>       <C>                                                                               
            6.05(a)           Notifications relating to electrical interference                         
                                                                                                         
            6.09(d)           Notifications of unsafe conditions                                        
                                                                                                         
            6.11(a)           Notification of manhole entry                                             
                                                                                                         
            6.13(c)           Notification of environmental contaminants                                
                                                                                                         
            10.02(b)          Notification of materials required for self-provisioning of inner duct    
                                                                                                         
            15.04             Notification of conditions requiring emergency repair                     

            15.06(a)          Notification of performing corrective work on emergency repair.
                              (advanced notice)
</TABLE>


<PAGE>   427
                                 APPENDIX VII
                   NOTICES TO SWBT (KANSAS) -- PAGE 3 OF 3


<TABLE>
          <S>               <C>
            15.06(a)          Notification of performing corrective work on emergency repair.
                              (advanced notice)
</TABLE>


     Additional information and questions concerning notice requirements.  The
ULS, as Applicant's initial point of contact, will provide additional
information to Applicant concerning notification procedures for notices to be
given to LSPC.  Questions to SWBT concerning notice requirements should be
directed to the ULS.  The ULS is not authorized to provide Applicant legal
advice with respect to notice requirements.  Questions by Applicant's personnel
and other persons acting on Applicant's behalf concerning Applicant's legal
obligations should be directed to Applicant's legal counsel or such other
personnel as Applicant may direct.

     Changes in notice requirements.  Changes in the notice requirements set
forth in this Appendix may be made by SWBT from time to time in accordance with
the provisions of Section 29.03 of the Master Agreement.


<PAGE>   428





                                          Agreement No._________________________

                                 APPENDIX VIII
             IDENTIFICATION OF UTILITY LIAISON SUPERVISOR (KANSAS)

     This Appendix is an integral part of the Master Agreement for Access to
Poles, Ducts, Conduits, and Rights-of-Way to which it is attached.

     The Utility Liaison Supervisor for Kansas is named below.  Notices to the
Utility Liaison Supervisor should be addressed as follow:

                Name:  Wayne White
                       ------------------------------------------------

                Title:  Utility Liaison Supervisor
                       ------------------------------------------------

                Firm:  Southwestern Bell Telephone Company
                       ------------------------------------------------

                Address:  500 E. 8th, Room 598
                          ---------------------------------------------

                City/State/Zip:  Kansas City.  Missouri 64106
                                 --------------------------------------







<PAGE>   1
                                                                   EXHIBIT 10.22


                                     INDEX




<TABLE>
                <S>                                       <C>
                SWBT/Digital Teleport, Inc. (Oklahoma)    Tab 1
                      800                                 Tab 2
                      911 - Texas                         Tab 3
                      AIN                                 Tab 4
                      BCR                                 Tab 5
                      CH                                  Tab 6
                      CNAM                                Tab 7
                      DCO                                 Tab 8
                      DA                                  Tab 9
                      FGA                                 Tab 10
                      HOST                                Tab 11
                      ITR                                 Tab 12
                      LIDB-AS                             Tab 13
                      LIDB-V                              Tab 14
                      OSS                                 Tab 15
                      OS                                  Tab 16
                      NIM/Physical Collocation Agreement  Tab 17
                      SS7                                 Tab 18
                      RECORDING                           Tab 19
                      RESALE                              Tab 20
                      UNE                                 Tab 21
                      WIRELESS                            Tab 22
                      WP                                  Tab 23
                      TP                                  Tab 24
                      PORT                                Tab 25
                      Poles, Ducts, Conduits & ROW        Tab 26
</TABLE>

<PAGE>   2



            INTERCONNECTION AGREEMENT UNDER SECTIONS 251 AND 252 OF
                       THE TELECOMMUNICATIONS ACT OF 1996





                                 by and between




                      SOUTHWESTERN BELL TELEPHONE COMPANY



                                      and



                             DIGITAL TELEPORT, INC.


<PAGE>   3

                                                                     PAGE 1 OF 3



                               TABLE OF CONTENTS
<TABLE>
<S>    <C>
1.0 DEFINITIONS..............................................................  1

2.0 INTERPRETATION AND CONSTRUCTION..........................................  5

3.0 IMPLEMENTATION SCHEDULE AND INTERCONNECTION ACTIVATION DATES.............  5

4.0  INTERCONNECTION PURSUANT TO SECTION 25l(c)(2)...........................  6
     4.1  Scope..............................................................  6
     4.2  Interconnection Coverage...........................................  6
     4.3  Methods for Interconnection........................................  7
     4.4  Physical Architecture..............................................  8
     4.5  Technical Specifications...........................................  9
     4.6  Interconnection in Additional Metropolitan Exchange Areas..........  9

5.0 TRANSMISSION AND ROUTING OF TELEPHONE EXCHANGE SERVICE TRAFFIC PURSUANT 
    TO SECTION 251(c)(2)..................................................... 10
    5.1  Scope of Traffic.................................................... 10
    5.2  Responsibilities of the Parties..................................... 10
    5.3  Reciprocal Compensation for Termination of Local Traffic............ 11
    5.4  Reciprocal Compensation for Transit Traffic......................... 12
    5.5  Reciprocal Compensation for Termination of IntraLATA Interexchange 
         Traffic............................................................. 12
    5.6  Compensation for Origination and Termination of Switched Access 
         Service Traffic to or From an IXC (Meet-Point Billing (MPB) 
         Arrangements)....................................................... 13
    5.7  Billing Arrangements for Compensation for Termination of IntraLATA, 
         Local, and Transit Traffic.......................................... 14

6.0 TRANSMISSION AND ROUTING OF EXCHANGE ACCESS TRAFFIC PURSUANT 
    TO 251 (c)(2)............................................................ 15
    6.1  Scope of Traffic.................................................... 15
    6.2  Trunk Group Architecture Traffic Routing............................ 16

7.0  TRANSPORT AND TERMINATION OF OTHER TYPES OF TRAFFIC..................... 16
     7.1  Information Services Traffic....................................... 16        
     7.2  Line Status Verification (LSV)/Busy Line Interrupt (BLI) Traffic... 16        
     7.3  Wireless Traffic................................................... 16        

8.0  SIGNALING............................................................... 17

9.0  NUMBERING............................................................... 17

10.0  RESALE -- SECTIONS 251(b)(1); 251(c)(4); 252(d)(3); and 
      271(c)(2)(B)(xiv)...................................................... 19
</TABLE>




<PAGE>   4




                                                                     PAGE 2 OF 3

<TABLE>
<S>   <C>
11.0 UNBUNDLED NETWORK ELEMENTS - SECTIONS 251(c)(3), 271(c)(2)(B)
     (ii),(iv),(v),(vi),(x)................................................ 19

12.0  NOTICE OF CHANGES -- SECTION 251(c)(5)............................... 19

13.0  COLLOCATION -- SECTION 251 (c)(6).................................... 19

14.0  NUMBER PORTABILITY -- SECTIONS 251(b)(2) and 271 (c)(2)(B)(xi)....... 20

15.0  DIALING PARITY -- SECTION 251(b)(3); 271(c)(2)(B)(xii); and 
      271(e)(2)............................................................ 20

16.0  ACCESS TO RIGHTS-OF-WAY.-- SECTION 251(b)(4) and 271(c)(2)(B)(iii)... 20

17.0  DATABASE ACCESS -- SECTION 271 (c)(2)(B)(x).......................... 21

18.0  INTERCEPT REFERRAL ANNOUNCEMENTS..................................... 21

19.0  COORDINATED REPAIR CALLS............................................. 21

20.0  OTHER SERVICES 271 (c)(B)(2)(vii) and 271(c)(2)(B)(viii)............. 22
  20.1  White Pages........................................................ 22
  20.2  Calling Name Information........................................... 22
  20.3  Billing/Collecting/Remitting....................................... 22
  20.4  911 /E911 Service.................................................. 22
  20.5  Directory Assistance (DA).......................................... 22
  20.6  Operator Services.................................................. 22
  20.7  Clearinghouse Services............................................. 22
  20.8  Hosting............................................................ 22
  20.9  Signaling System 7 Interconnection................................. 23

21.0  GENERAL RESPONSIBILITIES OF THE PARTIES.............................. 23

22.0  EFFECTIVE DATE, TERM, AND TERMINATION................................ 24

23.0  DISCLAIMER OF REPRESENTATIONS AND WARRANTIES......................... 25

24.0 CHANGES IN END USER LOCAL EXCHANGE SERVICE PROVIDER SELECTION......... 25

25.0   SEVERABILITY........................................................ 26

26.0   INTELLECTUAL PROPERTY............................................... 26

27.0   INDEMNIFICATION..................................................... 26

28.0   LIMITATION OF LIABILITY............................................. 28
</TABLE>


<PAGE>   5

                                                                    PAGE 3 OF 3
<TABLE>
<CAPTION>
<S>   <C>        
29.0  LIQUIDATED DAMAGES FOR SPECIFIED ACTIVITIES.......................... 28
      29.1  Certain Definitions............................................ 28
      29.2  Specified Performance Breach................................... 29
      29.3  Liquidated Damages............................................. 29
      29.4  Limitations.................................................... 30
      29.5  Sole Remedy.................................................... 30
      29.6  Records........................................................ 30

30.0  REGULATORY APPROVAL.................................................. 30

31.0  MISCELLANEOUS........................................................ 31
      31.1  Authorization.................................................. 31
      31.2  Compliance and Certification................................... 31
      31.3  Law Enforcement................................................ 31
      31.4  Independent Contractor......................................... 32
      31.5  Force Majeure.................................................. 32
      31.6  Confidentiality................................................ 33
      31.7  Governing Law.................................................. 34
      31.8  Taxes.......................................................... 35
      31.9  Non-Assignment................................................. 36
      31.10 Non-Waiver..................................................... 36
      31.11 Audits......................................................... 36
      31.12 Disputed Amounts............................................... 37
      31.13 Disputed Resolutions........................................... 37
      31.14 Notices........................................................ 38
      31.15 Publicity and Use of Trademarks or Service Marks............... 38
      31.16 Section 252(i) Obligations..................................... 39
      31.17 Joint Work Product............................................. 39
      31.18 Intervening Law................................................ 39
      31.19 No Third Party Beneficiaries; Disclaimer of Agency............. 40
      31.20 No License..................................................... 40
      31.21 Survival....................................................... 40
      31.23 Scope of Agreement............................................. 40
      31.24 Entire Agreement............................................... 40
</TABLE>                                                                   




<PAGE>   6






INTERCONNECTION AGREEMENT UNDER SECTIONS 251 AND 252 OF THE TELECOMMUNICATIONS
ACT OF 1996

     This Interconnection Agreement under Sections 251 and 252 of the
Telecommunications Act of 1996 ("Agreement"), is by and between Southwestern
Bell Telephone Company, a Missouri Corporation ("SWBT"), and Digital Teleport,
Inc. ("DTI").

     WHEREAS, the Parties want to interconnect their networks at mutually
agreed upon points of interconnection to provide, directly or indirectly,
Telephone Exchange Services and Exchange Access to residential and business end
users predominantly over their respective telephone exchange service facilities
in Oklahoma; and

     WHEREAS, the Parties are entering into this Agreement to set forth the
respective obligations of the Parties and the terms and conditions under which
the Parties will interconnect their networks and provide other services as
required by the Telecommunications Act of 1996 ("the Act") and additional
services as set forth herein; and

     WHEREAS, for purposes of this Agreement, the Parties intend to operate
where SWBT is the incumbent local exchange carrier and DTI, a competitive local
exchange carrier, is certified by the Oklahoma Corporation Commission, as
required.

     NOW, THEREFORE, DTI and SWBT hereby agree as follows:

1.0 DEFINITIONS

     1.1 "Act" means the Communications Act of 1934 [47 U.S.C. 153(R)], as
amended by the Telecommunications Act of 1996.

     1.2 "Affiliate" is as defined in the Act.

     1.3 "Automatic Number Identification" or "ANI" is a switching system
feature that forwards the telephone number of the calling party and is used for
screening, routing and billing purposes.

     1.4 "Busy Line Interrupt" or "BLI" is performed when one Party's operator
bureau interrupts a telephone number in progress after Line Status Verification
has occurred. The operator bureau will interrupt the busy line and inform the
called party that there is a call waiting.

     1.5 "Calling Party Number" or "CPN" is a feature of signaling system 7
(SS7) protocol whereby the ten (10) digit number of the calling party is
forwarded from the end office.

     1.6 "Central Office Switch" means a single switching system within the
public switched telecommunications network, including the following:


<PAGE>   7







          (i) "End Office Switches" which are Class 5 switches where end user
     Exchange Services are directly connected and offered; and

          (ii) "Tandem Office Switches" or "Tandems" which are Class 4 switches
     used to connect and switch trunk circuits between Central Office Switches.

Central Office Switches may be employed as combination End Office/Tandem Office
switches (combination Class 5/Class 4).

     1.7 "CLASS Features" mean certain CCS-based features available to end
users including, but not limited to: Automatic Call Back; Call Trace; Caller
Identification and related blocking features; Distinctive Ringing/Call Waiting;
Selective Call Forward; and Selective Call Rejection.

     1.8 "Collocation" means an arrangement whereby one Party's (the
"Collocating Party") facilities are terminated in its equipment necessary for
Interconnection or for access to Network Elements on an unbundled basis which
has been installed and maintained at the premises of a second Party (the
"Housing Party"). Collocation may be "physical" or "virtual." In "Physical
Collocation," the Collocating Party installs and maintains its own equipment in
the Housing Party's premises. In "Virtual Collocation," the Housing Party
installs and maintains the collocated equipment in the Housing Party's
premises. Collocation includes, but is not limited to, collocation of 38 GHz
basic transmission equipment, provided it complies with the guidelines in
SWBT's current Physical Collocation 02/14/97 Technical Publication provided to
DTI.

     1.9 "Commission" means the Oklahoma Corporation Commission.

     1.10 "Common Channel Signaling" or "CCS" is a special network, fully
separate from the transmission path of the public switched network, that
digitally transmits call set-up and network control data. Unless otherwise
agreed by the Parties, the CCS used by the Parties shall be SS7.

     1.11 "Cross Connect" means the unbundled network element cross connect
rate element which is used to designate connection between: i) the SWBT
distribution frame and an unbundled network element component, or ii) two
unbundled network element components, or iii) the SWBT distribution frame and
the tie cable termination point for DTI collocation.

     1.12 "Dialing Parity" is as defined in the Act. As used in this Agreement,
Dialing Parity refers to both Local Dialing Parity and Toll Dialing Parity.

     1.13 "Digital Signal Level" means one of several transmission rates in the
time-division multiplex hierarchy.


<PAGE>   8





     1.14 "Digital Signal Level 0" or "DS0" means the 64 Kbps zero-level signal
in the time-division multiplex hierarchy.

     1.15 "Digital Signal Level 1" or "DS1" means the 1.544 Mbps first-level
signal in the time-division multiplex hierarchy. In the time-division
multiplexing hierarchy of the telephone network, DS1 is the initial level of
multiplexing.

     1.16 "Digital Signal Level 3" or "DS3" means the 44.736 Mbps third-level in
the time-division multiplex hierarchy. In the time-division multiplexing
hierarchy of the telephone network, DS3 is defined as the third level of
multiplexing.

     1.17 "End User" means a third-party residence or business, that subscribes
to Telecommunications Services provided by either of the Parties, or by another
telecommunications service provider.

     1.18 "Exchange Access" is as defined in the Act.

     1.19 "Exchange Message Record" or "EMR" means the standard used for
exchange of Telecommunications message information among Telecommunications
Carriers for billable, non-billable, sample, settlement and study data. EMR
format is contained in Bellcore Practice BR-010-200-010 CRIS Exchange Message
Record.

     1.20 "Fiber-Meet" means an Interconnection architecture method whereby the
Parties physically interconnect their networks via an optical fiber interface
(as opposed to an electrical interface) at a mutually agreed upon location.

     1.21 "Interconnection" is as Described in the Act and refers to the
connection of separate pieces of equipment, facilities, or platforms between or
within networks for the purpose of transmission and routing of Telephone
Exchange Service traffic and Exchange Access traffic.

     1.22 "Interconnection Activation Date" is the date that the construction
of the joint facility Interconnection arrangement has been completed, trunk
groups have been established, and joint trunk testing is completed.

     1.23 "Interexchange Carrier" or "IXC" means a carrier that provides,
directly or indirectly, interLATA or intraLATA Telephone Toll Services. For
purposes of Section 6.0 of this Agreement, the term "IXC" includes any entity
which purchases FGB or FGD Switched Exchange Access Service in order to
originate or terminate traffic to/from DTI's end users.

     1.24 "IntraLATA Toll Traffic" means those intraLATA station calls that are
not defined as Local Traffic in this Agreement.


<PAGE>   9





     1.25 "Line Status Verification" or "LSV" or "Busy Line Verify" or "BLV" is
performed when one Party's end user requests assistance from the operator
bureau to determine if the called line of the other Party is in use.

     1.26 "Local Traffic," for purposes of intercompany compensation, is if (i)
the call originates and terminates in the same SWBT exchange area; or (ii)
originates and terminates within different SWBT Exchanges that share a common
mandatory local calling area, e.g., mandatory Extended Area Service (EAS),
mandatory Extended Local Calling Service (ELCS), or other like types of
mandatory expanded local calling scopes.

     1.27 "Losses" means any and all losses, costs (including court costs),
claims, damages (including fines, penalties, and criminal or civil judgments
and settlements), injuries, liabilities and expenses (including attorneys'
fees).

     1.28 "MECAB" refers to the Multiple Exchange Carrier Access Billing
(MECAB) document prepared by the Billing Committee of the Ordering and Billing
Forum (OBF), which functions under the auspices of the Carrier Liaison
Committee (CLC) of the Alliance for Telecommunications Industry Solutions
(ATIS). The MECAB document, published by Bellcore as Special Report
SR-BDS-000983, contains the recommended guidelines for the billing of access
services provided to an IXC by two or more LECs, or by one LEC in two or more
states within a single LATA. The latest release is issue No. 5, dated June
1994.

     1.29 "MECOD" refers to the Multiple Exchange Carriers Ordering and Design
(MECOD) Guidelines for Access Services - Industry Support Interface, a document
developed by the Ordering/Provisioning Committee of the Ordering and Billing
Forum (OBF), which functions under the auspices of the Carrier Liaison
Committee (CLC) of the Alliance for Telecommunications Industry" Solutions
(ATIS). The MECOD document, published by Bellcore as Special Report SR
STS-002643, establishes methods for processing orders for access service which
is to be provided to an IXC by two or more telecommunications providers. The
latest release is issue No. 3, dated February 1996.

     1.30 "Meet-Point Billing" or "MPB" refers to a billing arrangement whereby
two or more Telecommunications Carriers jointly provide for switched access
service to an IXC, with each LEC receiving an appropriate share of its switched
access revenues as defined by its effective access tariffs.

     1.31 "Metropolitan Exchange Area" means a geographical area defined in
SWBT current tariffs effective as a metropolitan exchange local calling area.
For example, Dallas, Ft. Worth, Houston, Little Rock, Oklahoma City, St. Louis,
Austin and would be examples of Metropolitan Exchange Areas.

     1.32 "Network Element Bona Fide Request" means the process described [in
Appendix BFR that is attached hereto and incorporated herein] that prescribes
the terms and conditions relating to a Party's request that the other Party
provide a Network Element.


<PAGE>   10





     1.33 "Switched Exchange Access Service" means the offering of transmission
or switching services to Telecommunications Carriers for the purpose of the
origination or termination of Telephone Toll Service. Switched Exchange Access
Services include, but are not necessarily limited to: Feature Group A, Feature
Group B, Feature Group D, 800/888 access, and 900 access and their successors
or similar Switched Exchange Access services.

     1.34 "Telephone Exchange Services"

     1.35 "Synchronous Optical Network" or "SONET" means an optical interface
standard that allows inter-networking of transmission products from multiple
vendors. The base rate is 51.84 Mbps (OC-1/STS-1) and higher rates are direct
multiples of the base rate, up to 13.22 Gpbs.

     1.36 "Telephone Exchange Service" is as defined in the Act.

     1.37 "Wire Center" means an occupied structure or portion thereof in which
a Party has the exclusive right of occupancy and which serves as a Routing
Point for Switched Exchange Access Service.

2.0 INTERPRETATION AND CONSTRUCTION

     In the event of any amendment of the Act or any legislative, regulatory,
judicial order, rule or regulations, or other legal action that revises or
reverses the Act, the FCC's Orders in FCC Docket Nos. 96-98 and 95-185 or any
applicable order or arbitration award purporting to apply the provisions of the
federal Act, the Parties reserve all of their rights and remedies, including
those to amend, alter, or revise this Agreement.

3.0 IMPLEMENTATION SCHEDULE AND INTERCONNECTION ACTIVATION DATES

     Subject to the terms and conditions of this Agreement, Interconnection of
the Parties' facilities and equipment pursuant to Sections 4.0, 5.0 and 6.0 for
the transmission and routing of Telephone Exchange Service traffic and Exchange
Access traffic shall be established on or before the corresponding
"Interconnection Activation Date" shown for each such Metropolitan Exchange
Area on Appendix DCO attached hereto and incorporated by reference. Appendix
DCO may be revised and supplemented from time to time upon the mutual agreement
of the Parties to reflect the Interconnection of additional Metropolitan
Exchange Areas pursuant to Section 4.6 by modifying or updating Appendix DCO.


<PAGE>   11





4.0  INTERCONNECTION PURSUANT TO SECTION 251(c)(2)

4.1  SCOPE

     This Section 4.0 describes the physical architecture for Interconnection
of the Parties' facilities and equipment for the transmission and routing of
Telephone Exchange Service traffic and Exchange Access traffic pursuant to
Section 251(c)(2) of the Act. Such Interconnections shall be equal in quality
to that provided by the Parties to themselves or to any subsidiary, affiliate
or Third Party. Appendix ITR attached hereto and incorporated by reference
prescribes the specific trunk groups (and traffic routing parameters) which
will be configured over the physical connections described in this Section 4.0
to provide the facilities for the transmission and routing of Telephone
Exchange Service traffic (as described in Section 5.0), Exchange Access traffic
(as described in Section 6.0), LSV/BLI traffic (as described in sub-section
7.2).

4.2 INTERCONNECTION COVERAGE

     The Parties shall provide for interoperation of their networks and shall
interconnect their facilities as stated below:

     4.2.1. DTI shall interconnect with SWBT's facilities as follows:

     a. In each SWBT exchange area in which DTI chooses to offer local exchange
service, DTI, at a minimum, will interconnect its network facilities to: (a)
each SWBT access tandem(s), and (b) to either each SWBT local tandem(s) or each
SWBT end office(s) ("EO") subtending that local tandem(s). SWBT EOs and tandems
through which DTI will terminate its traffic will be called SWBT Interconnection
Wire Centers and are identified in Appendix DCO. As DTI initiates Exchange
Service operations in additional SWBT exchange areas, SWBT and DTI shall agree
upon additional SWBT Interconnection Wire Centers in each new exchange area. DTI
agrees that if SWBT establishes additional tandems in an exchange area within
which DTI offers local exchange service, DTI will interconnect to the additional
tandems.

     b. Interconnection to a SWBT local tandem(s) will provide DTI local access
to the SWBT end offices and NXXs which subtend that tandem(s), and to other
Local Exchange Carriers ("LECs") (subject to sub-section 5.4) which are
connected to that tandem(s). Interconnection to SWBT EO(s) will provide DTI
access only to the NXXs served by that individual EO(s) to which DTI
interconnects.

     c. Interconnection to a SWBT access tandem will provide DTI interexchange
access to SWBT, IXCs, LECs and CRMS providers (subject to sub-section 7.3)
which are connected to that tandem. Where an access tandem also provides local
tandem functions, interconnection to a SWBT access tandem


<PAGE>   12





serving that exchange will also provide DTI access to SWBT's EOs with the same
functionality described in (b) above.

     d. Where DTI requires ancillary services (e.g., Directory Assistance,
Operator Assistance, E911/911) additional interconnection to SWBT's
Interconnection Wire Center(s) or special trunking will be required for
interconnection to such ancillary services.

     4.2.2. SWBT shall interconnect with DTI's facilities under terms and
conditions no less favorable than those identified in sub-section 4.2.1, above.

     4.3 METHODS FOR INTERCONNECTION

     Where the Parties interconnect, for the purpose of exchanging traffic
between networks, the Parties may use the following interconnection methods of
each Tandem and End Office identified in Appendix DCO making use of facilities
they own or lease from a third party.

     4.3.1 Physical Collocation Interconnection ("PCI") - Where DTI provides
fiber cable and connects to its equipment located in the SWBT Wire Center. DTI
owns and maintains DTI's equipment.

     4.3.2 Virtual Collocation Interconnection ("VCI") - Where DTI provides
fiber cable to SWBT for connection to DTI-designated basic transmission
equipment dedicated solely for DTI's use, located in the SWBT Interconnection
Wire Center. SWBT owns and maintains the basic transmission equipment at the
SWBT Interconnection Wire Center. This option shall be consistent with the
terms of SWBT's virtual collocation tariff.

     4.3.3 SONET-Based Interconnection ("SBI") - Where DTI provides fiber cable
to SWBT for connection to SWBT-designated basic transmission equipment located
at the SWBT Interconnection Wire Center and dedicated solely for DTI's use.
SWBT owns and maintains the basic transmission equipment. This option shall be
consistent with SWBT's SBI tariff.

     4.3.4 Leased Facility Interconnection ("LFI") - Where network facilities
exist, either Party may lease facilities from the other Party at rates no
greater than SWBT Access Tariff rates.

     4.3.5 Mid-span Fiber Interconnection ("MSFI") - Where the Parties agree to
interconnect through SONET technology, using a Fujitsu originating line
terminating multiplexer fiber optic terminal ("FOT") details of this
architecture are addressed in Appendix MSFI attached hereto and incorporated by
reference. This interconnection arrangement is limited to interconnecting
trunks.


<PAGE>   13





     4.3.6 The Parties may agree to utilize another Interconnection Method as
may be determined to be technically feasible in the future.

     4.4 PHYSICAL ARCHITECTURE. Using one or more of the Interconnection
Methods described in Section 4.3 above, the Parties will agree on a physical
architecture plan.  This plan will be documented within Appendix DCO. The
Parties agree to deploy one physical architecture plan per Metropolitan Serving
Area.  The two architecture arrangements, End Point Meet and Mid-Point Meet,
are discussed below. Additional physical architectures, as yet undefined, may
evolve during the term of this Agreement.  These future as yet undefined
architectures can be deployed if mutually agreed upon.

     4.4.1 End Point Meet. Using the "End Point Meet" architecture, the Parties
will establish transport facilities from their own Central Office(s) to the
other party's Central Office(s) utilizing any method of interconnection
described in Section 4.3 above. Unless otherwise mutually agreed upon, each
Party will use its own transport facilities to provide its trunking as set
forth in Appendix ITR. Each Party will be responsible for the appropriate
sizing, operation, and maintenance of its own transport facilities.  If
initially deployed as an End Point Architecture, the deployment architecture
may be migrated or groomed, upon mutual agreement, to a Mid-Point Meet
architecture.

     4.4.2 Mid-Point Meet. Using the Mid-Point Meet architecture, the Parties
will agree upon a Network Interconnection Point (NIP). The NIP functions as a
demarcation point for each Party.  Each Party is responsible to transport all
trunking to its side of the NIP utilizing any method of interconnection
described in Section 4.3 above. Each Party is responsible for the appropriate
sizing, operation, and maintenance of the transport facility and trunking to
the NIP.

     4.4.2.1 A second NIP can be established to eliminate a "single point of
failure" when mutually agreed upon.  The establishment of the second NIP should
not require additional or increased trunking or facilities of either Party.
Trunking from the initial NIP will be groomed or augmented to the second NIP
upon mutual agreement.

     4.4.2.2 When required, based on guidelines established pursuant to
Appendix ITR, either Party may trunk directly to the other Party's EO.  If the
Party is virtually or physically collocated to the EO, then that collocation
will be designated a NIP.  This collocation will be used for the transport of
direct EO trunking, in addition to other uses.  The collocated Party is
responsible for the appropriate sizing, operation, and maintenance of the
transport facility. In the instance where the Party is not collocated, the EO
trunk group will be handed off at the original NIP and both Parties will be
responsible for the transport facility on their side of that NIP.

     4.4.2.3 Unless otherwise mutually agreed upon, when Mid-Point Meet
architecture has been deployed, it will remain as the architecture of choice
during the term of this Agreement.


<PAGE>   14





     4.5 TECHNICAL SPECIFICATIONS

     4.5.1 DTI and SWBT shall work cooperatively to install and maintain a
reliable network. DTI and SWBT shall exchange appropriate information (e.g.,
maintenance contact numbers, network information, information required to
comply with law enforcement and other security agencies of the Government and
such other information as the Parties shall mutually agree) to achieve this
desired reliability.

     4.5.2 DTI and SWBT shall work cooperatively to apply sound network
management principles by invoking network management controls to alleviate or
to prevent congestion.

     4.5.3 Technical Publications that describes the practices, procedures,
specifications and interfaces generally utilized by SWBT, are listed in
Appendix TP attached hereto and incorporated by reference. Appendix TP will
herein assist the Parties in meeting their respective Interconnection
responsibilities. Copies of the publications listed in Appendix TP have been or
shall be provided to DTI by SWBT.

     4.6 INTERCONNECTION IN ADDITIONAL METROPOLITAN EXCHANGE AREAS

     4.6.1 If DTI decides to offer Telephone Exchange Services in any other
Metropolitan Exchange and Areas in which SWBT also offers Telephone Exchange
Services, DTI shall provide written notice to SWBT of the need to establish
Interconnection in such Metropolitan Exchange Areas pursuant to this Agreement.

     4.6.2 The notice provided in Section 4.6.1 shall include: (i) the initial
Routing Point DTI has designated in the Metropolitan Exchange Area; (ii) DTI's
requested Interconnection Activation Date; and (iii) a non-binding forecast of
DTI's trunking requirements.

     4.6.3 Unless otherwise agreed by the Parties, the Parties shall designate
the Wire Center that DTI has identified as its initial Routing Point in the
Metropolitan Exchange Area as DTI Interconnection Wire Center ("IWC") in that
Metropolitan Exchange Area and shall designate the SWBT Tandem Office Wire
Center within the Metropolitan Exchange Area nearest to the IWC (as measured in
airline miles utilizing the V&H coordinates method) as the SWBT Interconnection
Wire Center (SIWC) in that Metropolitan Exchange Area.

     4.6.4 Unless otherwise agreed by the Parties, the Interconnection
Activation Date in each new Metropolitan Exchange Area shall be the one-hundred
and fiftieth (150th) day following the date on which DTI delivered notice to
SWBT of the need to establish Interconnection pursuant to Section 4.6.1 above.
Within ten (10) business days of SWBT's receipt of DTI's notice, SWBT and DTI
shall confirm their respective Wire Centers to be Interconnected and the
Interconnection Activation Date for the new Metropolitan Exchange Area by
attaching a supplementary schedule to Appendix DCO.


<PAGE>   15




5.0  TRANSMISSION AND ROUTING OF TELEPHONE EXCHANGE SERVICE TRAFFIC
     PURSUANT TO SECTION 251(c)(2)

     5.1 SCOPE OF TRAFFIC

     This Section 5.0 prescribes parameters for Traffic Exchange trunk groups
the Parties shall establish over the Interconnections specified in Section 4.0.
The Parties shall employ the Traffic Exchange trunk groups specified in this
Section 5.0 and in Appendix ITR.  The Parties shall employ for the transmission
and routing of all Local and IntraLATA Toll Traffic between the Parties'
respective Telephone Exchange Service end users.

     5.1.1 For purposes of compensation under this Agreement, the
telecommunications traffic traded between DTI and SWBT will be classified as
either Local Traffic, Transit Traffic, IntraLATA Interexchange Traffic,
InterLATA Interexchange Traffic, or FGA Traffic.  The compensation arrangement
for the joint provision of Feature Group A (FGA) Services is covered in
Appendix FGA, attached hereto and incorporated herein by reference.  The
Parties agree that, notwithstanding the classification of traffic under this
Agreement, either Party is free to define its own "local" calling area(s) for
purposes of its provision of Telecommunications Services to its end users.

     5.1.2 Calls originated by one Party's end user and terminated to the other
Party's end user will be classified as "Local Traffic" under this Agreement if
the call: (i) originates and terminates in the same SWBT exchange area; or (ii)
originates and terminates within different SWBT Exchanges that share a common
mandatory local calling area, e.g., mandatory Extended Area Service (EAS),
mandatory Extended Local Calling Service (ELCS), or other like types of
mandatory expanded local calling scopes.

     5.2 RESPONSIBILITIES OF THE PARTIES

     5.2.1 Each Party to this Agreement will be responsible for the accuracy
and quality of its data as submitted to the respective Parties involved.

     5.2.2 Each Party will include in the information transmitted to the other
for each call being terminated on the other's network (where available), the
originating Calling Party Number (CPN).

     5.2.3 If the percentage of calls passed with CPN is greater than ninety
percent (90%), all calls exchanged without CPN information will be billed as
either Local Traffic or IntraLATA Toll Traffic in direct proportion to the
minutes of use (MOU) of calls exchanged with CPN information.  If the
percentage of calls passed with CPN is less than ninety percent (90%), all
calls passed without CPN will be billed as switched access.

     5.2.4 The type of originating calling number transmitted depends on the
protocol of the trunk signaling used for interconnection. Traditional toll
protocol will be used
<PAGE>   16




with Multi-Frequency (MF) signaling, and ANI will be sent from the originating
Party's end office switch to the terminating Party's tandem or end office
switch.

     5.2.5 Where one Party is passing CPN but the other party is not properly
receiving information, the Parties will cooperate to rate the traffic
correctly.

     5.3  RECIPROCAL COMPENSATION FOR TERMINATION OF LOCAL TRAFFIC

     5.3.1 The Compensation set forth below will apply to all Local Traffic as
defined in sub-section 5.1.2 of this Agreement.

     5.3.2 Applicability of Rates

     i) The rates, terms, conditions in this Section 5.3 apply only to the
        termination of Local Traffic, except as explicitly noted.

     ii) The Parties agree to compensate each other for the termination of Local
        Traffic on a minute of use (MOU) basis.

     5.3.3 Rate Elements

     5.3.3.1 A Tandem Served rate element is applicable to Tandem Routed Local
Traffic on a terminating local MOU basis and includes compensation for the
following sub-elements:

     i) Tandem Switching - compensation for the use of tandem switching
        functions.

     ii) Tandem Transport - compensation for the transmission facilities between
         the local tandem and the end offices subtending that tandem.

     iii) End Office Switching - compensation for the local EO office switching
          and line termination functions necessary to complete the transmission.

     5.3.3.2 An End Office Served rate element applies to direct-routed
Local Traffic on a terminating local MOU basis and includes compensation for
End Office Switching.  This includes direct-routed Local Traffic that
terminates to offices that have combined tandem and End Office functions.

<PAGE>   17





     5.3.4  Local Traffic Interconnection Rates

<TABLE>
<CAPTION>
               Serving Method     Prices Per MOU
              <S>                <C>
              Tandem Served       $.00975
              End Office Served   $.00720
</TABLE>

5.4  RECIPROCAL COMPENSATION FOR TRANSIT TRAFFIC


     5.4.1 Transit Traffic allows one Party to send traffic to a third party
network through the other Party's tandem. A Transit Traffic rate element
applies to all MOUs between a Party and third party networks that transit the
other Party's tandem switch. The originating Party is responsible for the
appropriate rates unless otherwise specified. The Transit Traffic rate element
is only applicable when calls do not originate with (or terminate to) the
transit Party's end user. The Local Transit Traffic rate element applies when
both the originating and terminating end users are within SWBT local and
mandatory exchanges.


<TABLE>
<CAPTION>
Type of Transit Traffic    Prices Per MOU
<S>                        <C>
Local Transit              $0.003
</TABLE>

     5.4.2 All other traffic which transits a tandem shall be treated as
Meet-Point Billing Traffic as described in Section 5.6 below or as intraLATA
interexchange traffic as described in Section 5.5.3 below, unless otherwise
agreed.

     5.4.3 Each Party represents that it shall not send Local Traffic to the
other Party that is destined for the network of a third party unless and until
such Party has the authority to exchange traffic with the third party.

5.5 RECIPROCAL COMPENSATION FOR TERMINATION OF INTRALATA INTEREXCHANGE TRAFFIC

     5.5.1 For intrastate intraLATA interexchange service traffic, compensation
for termination of intercompany traffic will be at terminating access rates for
Message Telephone Service (MTS) and originating access rates for 800 Service,
including the Carrier Common Line (CCL) charge, as set forth in each party's
Intrastate Access Service Tariff or as otherwise mutually agreed. For interstate
intraLATA intercompany service traffic, compensation for termination of
intercompany traffic will be at terminating access rates for MTS and originating
<PAGE>   18




access rates for 800 Service including the CCL charge, as set forth in each
party's interstate Access Service Tariff or as otherwise mutually agreed.

5.6  COMPENSATION FOR ORIGINATION AND TERMINATION OF SWITCHED ACCESS SERVICE
     TRAFFIC TO OR FROM AN IXC (MEET-POINT BILLING (MPB) ARRANGEMENTS)

     5.6.1 For interstate, interLATA traffic, terminating compensation will be
at access rates as set forth in each Party's own applicable access tariffs.

     5.6.2 The Parties will establish MPB arrangements in order to provide
Switched Access Services to IXCs via SWBT's access tandem switch in accordance
with the MPB guidelines adopted by and contained in the Ordering and Billing
Forum's MECOD and MECAB documents. DTI's Meet Points with SWBT shall be those
identified in Appendix DCO and any supplements thereto.

     5.6.3 Billing to IXCs for the Switched Exchange Access Services jointly
provided by the Parties via Meet-Point Billing arrangement shall be according
to the multiple bill/multiple tariff method. As described in the MECAB
document, each Party will render a bill in accordance with its own tariff for
that portion of the service it provides.  For the purpose of this Agreement,
DTI is the Initial Billing Company (IBC) and SWBT is the Subsequent Billing
Company (SBC). The assignment of revenues, by rate element, and the Meet-Point
Billing percentages applicable to this Agreement are set forth in Appendix DCO.
The actual rate values for each element shall be the rates contained in that
Party's own applicable access rates.

     5.6.4 The Parties, as applicable, will maintain provisions in their
respective federal and state access tariffs, or provisions within the National
Exchange Carrier Association (NECA) Tariff No. 4, or any successor tariff,
sufficient to reflect this MPB arrangement, including MPB percentages.

     5.6.5 As detailed in the MECAB document, the Parties will, in accordance
with accepted time intervals, exchange all information necessary to accurately,
reliably and promptly bill third Parties for Switched Access Services traffic
jointly handled by the Parties via the Meet Point Arrangement. Each Party
reserves the right to charge the other Party for the recording/processing
functions it performs pursuant to the terms and conditions of Appendix
Recording attached hereto and incorporated by reference. Information shall be
exchanged in Exchange Message Record (EMR) format, on magnetic tape or via a
mutually acceptable electronic file transfer protocol.

     5.6.6 Initially, billing to IXCs for the Switched Access Services jointly
provided by the parties via the MPB arrangement will be according to the
multiple bill/multiple tariff method, as described in the MECAB document. Each
Party will render a bill to the IXC in accordance with its own rate structure
for that portion of the service it provides. Each Party will bill its own
network access service rates to the IXC. The residual interconnection charge
(RIC), if any, will be billed by the Party providing the End Office function.


<PAGE>   19




     5.6.7 Meet-Point Billing shall also apply to all jointly provided MOU
traffic bearing the 900, 800, and 888 NPAs or any other non-geographic NPAs
which may likewise be designated for such traffic in the future where the
responsible party is an IXC. When SWBT performs 800 database queries, SWBT will
charge the provider of the Signaling Service Point for the database query in
accordance with standard industry practices.

     5.6.8 Each Party shall coordinate and exchange the billing account
reference ("BAR") and billing account cross reference ("BACR") numbers for the
Meet Point Billing service. Each Party shall notify the other if the level of
billing or other BAR/BACR elements change, resulting in a new BAR/BACR number.

     5.6.9 Each Party will provide the other with the Exchange Access detailed
usage data within thirty (30) days of the end of the billing period. SWBT will
perform assembly and editing, messages processing and provision of Access Usage
Records in accordance with Appendix Recording, attached hereto and incorporated
by reference.  Each Party will provide to the other the Exchange Access summary
usage data within ten (10) working days after the date that a bill is rendered
to the IXC by the initial Party.  To the extent DTI provides SWBT with Access
Usage Records, SWBT will compensate DTI on the same terms as DTI compensates
SWBT per Appendix Recording. SWBT acknowledges that currently there is no
charge for Summary Usage Data Records but that such a charge may be
appropriate. At DTI's request, SWBT will negotiate a mutual and reciprocal
charge for provision of Summary Usage Data Records.

     5.6.10 Errors may be discovered by DTI, the IXC or SWBT. Both SWBT and DTI
agree to provide the other Party with notification of any discovered errors
within two (2) business days of the discovery.

     5.6.11 In the event of a loss of data, both Parties shall cooperate to
reconstruct the lost data within sixty (60) days of notification and if such
reconstruction is not possible, shall accept a reasonable estimate of the lost
data, based upon no more than three (3) to twelve (12) months of prior usage
data, if available.

5.7  BILLING ARRANGEMENTS FOR COMPENSATION FOR TERMINATION OF INTRALATA, LOCAL,
     AND TRANSIT TRAFFIC

     5.7.1 Other than for traffic described in sub-section 5.6 above, each
Party shall deliver monthly settlement statements for terminating the other
Party's traffic based on the following:

          5.7.1.1 Each Party shall, unless otherwise agreed, adhere to the
     detailed technical descriptions and requirements for the recording, record
     exchange, and billing of traffic using the guidelines as set forth in the
     Technical Exhibit Settlement Procedures (TESP),
<PAGE>   20





previously provided by SWBT to DTI. Reference to this technical publication is
included in Appendix TP.

     (a) Where DTI has direct/high usage trunks to a SWBT end office
with overflow trunking through a SWBT tandem, billing for the Tandem Traffic
will be calculated as follows:

     Total Originating MOUs Recorded By DTI Less Direct End Office Terminating
MOUs Recorded By SWBT Equals Total MOUs To Be Compensated As Tandem Traffic

     (b) Where DTI has direct/high usage trunks to a third party with overflow
trunking through a SWBT tandem, DTI must differentiate the originating MOU
records for the Parties to ascertain how many MOUs should be compensated as
Transit Traffic.  If DTI is unable to so differentiate the originating MOU
records, the Parties shall mutually agree upon a surrogate method for
calculating Transit Traffic charges owed to SWBT.

     5.7.1.2 On a monthly basis, each Party will record its originating MOU
including identification of the originating and terminating NXX for all
intercompany calls.

     5.7.1.3 Each Party will transmit the summarized originating MOU from
Section 5.7.1.1 above to the transiting and/or terminating Party for subsequent
monthly intercompany settlement billing.

     5.7.1.4 Bills rendered by either Party will be paid within thirty (30)
days of receipt subject to subsequent audit verification.

     5.7.1.5 MOUs for the rates contained herein will be measured in seconds by
call type, and accumulated each billing period into one (1) minute increments
for billing purposes in accordance with industry rounding standards.

     5.7.1.6 Each Party will multiply the tandem routed and end office routed
terminating MOUs by the appropriate rate contained in this Section to determine
the total monthly billing to each Party.

6.0 TRANSMISSION AND ROUTING OF EXCHANGE ACCESS TRAFFIC PURSUANT TO 251(c)(2)

     6.1 SCOPE OF TRAFFIC

     Section 6.0 prescribes parameters for certain trunk groups ("Access Toll
Connecting Trunks") to be established over the Interconnections specified in
Section 4.0 above, for the


<PAGE>   21






transmission and routing of Exchange Access traffic between DTI Telephone
Exchange Service end users and IXCs via a SWBT access tandem.

     6.2 TRUNK GROUP ARCHITECTURE AND TRAFFIC ROUTING

     6.2.1 The Parties shall jointly establish Access Toll Connecting Trunks as
described in Appendix ITR, by which will jointly provide tandem-transported
Switched Exchange Access Services to IXCs to enable DTI's end users to
originate and terminate traffic to/from such IXCs.

     6.2.2 Access Toll Connecting Trunks shall be used solely for the
transmission and routing of Switched Exchange Access to allow DTI end users to
originate and terminate traffic to/from any IXCs which is connected to a SWBT
Access Tandem. In addition, the trunks shall be used to allow DTI's end users
to connect to, or be connected to, the 800 Services of any Telecommunications
Carrier connected to the SWBT Access Tandem.

7.0  TRANSPORT AND TERMINATION OF OTHER TYPES OF TRAFFIC

     7.1  INFORMATION SERVICES TRAFFIC

     7.1.1 At such time as the Parties agree to route intraLATA Information
Services Traffic to one another, they shall agree to exchange rating and
billing information to effectively allow the Parties to bill their end users
and to charge reciprocal rates.

     7.2 LINE STATUS VERIFICATION (LSV)/BUSY LINE INTERRUPT (BLI) TRAFFIC

     7.2.1 Each Party's operator bureau shall accept LSV and BLI inquiries from
the operator bureau of the other Party in order to allow transparent provision
of LSV/BLI Traffic between the Parties' networks.  Only one LSV attempt will be
made per end user operator bureau call, and the applicable charge shall apply
whether or not the line is busy at the time of verification or if the called
party agrees to release the line.  Only one BLI attempt will be made per end
user operator telephone call, and the applicable charge shall apply whether or
not the line is in use at the to time of interrupt or the called party releases
the line.

     7.2.2 Each Party shall route LSV/BLI Traffic inquiries between the
Parties' respective operator bureaus over trunks described in Appendix ITR.

     7.3 WIRELESS TRAFFIC

     7.3.1 Appendix Wireless, attached hereto and incorporated by reference sets
forth the terms and conditions under which the Parties will distribute revenue
from their joint provision of Wireless Interconnection Service for mobile to
landline traffic terminating through the Parties' respective wireline switching
networks within a LATA. If one Party enters into an interconnection agreement
with a CMRS provider, Appendix Wireless shall no longer be


<PAGE>   22





applicable between the Parties with respect to such CMRS providers, and the
other Party shall be obligated to enter into an agreement with such CMRS
provider for the termination of wireless to landline traffic.

     7.3.2 DTI shall pay the Local Transit Traffic rate to SWBT for calls that
originate on DTI's network and are sent to SWBT for termination to a CMRS
Provider as long as such Traffic can be identified as wireless traffic.  SWBT
shall pay the Local Transit Traffic rate to DTI for such calls that originate
on SWBT's network are sent through DTI for termination on a CMRS Provider's
network.  Each Party shall be responsible for interconnection agreements with
CMRS providers for terminating compensation regarding traffic originating on
the Party's network and terminating on the CMRS provider's network.

     7.3.3 When traffic is originated by either Party to a CMRS Provider, and
the traffic cannot be specifically identified as wireless traffic for purposes
of compensation between SWBT and DTI, the traffic will be rated either as
Local, or Access and the appropriate compensation rate shall be paid by the
originating Party to the transiting Party.  The originating Party agrees to
indemnify the transiting Party for any claims of compensation that may be made
by the CMRS provider against the transiting Party regarding compensation for
such traffic.

8.0 SIGNALING

     8.1 The SWBT signaling publications that describe the practices,
procedures and specifications generally utilized by SWBT for signaling purposes
and are listed in Appendix TP which is attached hereto and incorporated herein.
A copy of these publications have been provided to DTI.

     8.2 The Parties will cooperate on the exchange of Transactional
Capabilities Application Part (TCAP) messages to facilitate interoperability of
CCS-based features between their respective networks, including all CLASS
features and functions, to the extent each Party offers such features and
functions to its end users.  All CCS signaling parameters will be provided
including, without limitation, calling party number (CPN), originating line
information (OLI), calling party category and charge number.

9.0 NUMBERING

     9.1  Nothing in this Agreement shall be construed to limit or otherwise
adversely impact in any manner either Party's right to employ or to request and
be assigned any North American Numbering Plan (NANP) number resources including,
but not limited to, central office (NXX) codes pursuant to the Central Office
Code Assignment Guidelines(1), or to establish, by


(1) Last published by the Industry Numbering Committee ("INC") as 
    INC 95-0407-008, Revision 4/7/95, formerly ICCF 93-0729-010.

<PAGE>   23





tariff or otherwise, Exchanges and Rating Points corresponding to such NXX
codes.  Each Party is responsible for administering the NXX codes it is
assigned.

     9.2 At a minimum, in those Metropolitan Exchange Areas where DTI intends
to provide local exchange service, DTI shall obtain a separate NXX code for
each SWBT exchange or group of exchanges that share a common mandatory calling
scope as defined in SWBT tariffs.  This will enable DTI and SWBT to identify
the jurisdictional nature of traffic for intercompany compensation until such
time as both Parties have implemented billing and routing capabilities to
determine traffic jurisdiction on a basis other than NXX codes.

     9.3 Each Party agrees to make available to the other, up-to-date listings
of its own assigned NPA-NXX codes, along with associated Rating Points and
Exchanges.

     9.4 To the extent SWBT serves as Central Office Code Administrator for a
given region, SWBT commits to treat DTI requests for assignment of central
office code(s) in a neutral and nondiscriminatory manner, consistent with
regulatory requirements, and (NXX) Central Office Code Assignment Guidelines.

     9.5 Each Party is responsible to program and update its own switches and
network systems to recognize and route traffic to the other Party's assigned
NXX codes at all times.  Neither Party shall impose fees or charges on the
other Party for such required programming and updating activities.

     9.6 Each Party is responsible to input required data into the Routing Data
Base Systems (RDBS) and into the Bellcore Rating Administrative Data Systems
(BRADS) or other appropriate system(s) necessary to update the Local Exchange
Routing Guide (LERG), unless negotiated otherwise.

     9.7 Neither Party is responsible for notifying the other Parties' end
users of any changes in dialing arrangements, including those due to NPA
exhaust, unless otherwise ordered by the Commission, the FCC, or a court.

     9.8 NXX MIGRATION. Where either Party has activated an entire NXX for a
single end user, or activated more than half of an NXX for a single end user
with the remaining numbers in that NXX either reserved for future use or
otherwise unused, if such end user chooses to receive service from the other
Party, the first Party shall cooperate with the second Party to have the entire
NXX reassigned in the LERG (and associated industry databases, routing tables,
etc.) to an End Office operated by the second Party.  Such transfer will
require development of a transition process to minimize impact on the Network
and on the end user(s)' service and will be subject to appropriate industry
lead times (currently forty-five (45) days) for movements of NXXs from one
switch to another.  The Party to whom the NXX is migrated will pay NXX
migration charges of $10,000 per NXX to the Party formerly assigned the NXX.


<PAGE>   24




10.0  RESALE -- SECTIONS 251(b)(1); 251(c)(4); 252(d)(3); and 271(c)(2)
                (B)(xiv);

10.1 AVAILABILITY OF SWBT RETAIL TELECOMMUNICATIONS SERVICES FOR RESALE


     SWBT shall offer to DTI for resale at wholesale rates its
Telecommunications Services, as described in Section 251(c)(4) of the Act,
pursuant to the terms and conditions of Appendix Resale attached hereto and
incorporated herein by this reference.

     10.2 AVAILABILITY OF DTI RETAIL TELECOMMUNICATION SERVICES FOR RESALE 
DTI shall make available its Telecommunications Services for resale at wholesale
rates to SWBT in accordance with Section 251(b)(1) of the Act.

11.0 UNBUNDLED NETWORK ELEMENTS -- SECTIONS 251(c)(3), 271(c)(2)(B)
(ii),(iv),(v),(vi),(x)

     11.1 SWBT shall provide DTI access to unbundled network elements for the
provision of a telecommunication service as described in Section 251(c)(3) and
271(c)(2)(B) of the Act, pursuant to the terms and conditions of Appendix UNE
attached hereto and incorporated herein by this reference.

     11.2 DTI shall make available to SWBT access to its Unbundled Network
elements in accordance with Section 251 (c)(3) of the Act.

12.0 NOTICE OF CHANGES -- SECTION 251(c)(5)

     Nothing in this Agreement shall limit either Party's ability to upgrade
its network through the incorporation of new equipment, new software or
otherwise.  If a Party makes a change in its network which it believes will
materially affect the interoperability of its network with the other Party, the
Party making the change shall provide at least ninety (90) days advance written
notice of such change to the other Party. Notwithstanding the foregoing, if
either Party establishes additional tandems in an exchange area in which the
other Party offers local exchange service, that Party will provide the other
Party with not less than one-hundred eighty (180) days' advance notification of
same, and with greater notification when practicable. Both Parties agree to
coordinate interconnection matters consistent with the requirements of the
Americans with Disabilities Act (42 U.S.C. 12101) and with Sections 255 and 256
of the Act. In addition, the Parties will comply with the Network Disclosure
rules adopted by the FCC in CC Docket No. 96-98, Second Report and Order, as
may be amended from time to time.  The Party upgrading its network shall be
solely responsible for the cost and effort of accommodating such changes in its
own network.

13.0 COLLOCATION -- SECTION 251(c)(6)


<PAGE>   25




     13.1 SWBT shall provide to DTI Physical Collocation space necessary for
Interconnection (pursuant to Section 4.0 of this Agreement) or access to
Network Elements on an unbundled basis except that SWBT may provide for Virtual
Collocation if SWBT demonstrates that Physical Collocation is not practical for
technical reasons or because of space limitations, as provided in Section
251(c)(6) of the Act. SWBT shall provide such Collocation for the purpose of
Interconnection or access to Network Elements on an unbundled basis, except as
otherwise mutually agreed to in writing by the Parties or as required by the
FCC or the appropriate Commission, subject to applicable federal and state
tariffs.

     13.2 Except as otherwise ordered by the Commission or the FCC, or as
mutually agreed to by DTI and SWBT, Physical Collocation shall be available at
a Central Office Switch location classified as an end office location, a
serving wire center, a tandem office location, or a remote node that serves as
a rating point for special access or switched access transport.

14.0 NUMBER PORTABILITY--SECTIONS 251(b)(2) and 271(c)(2)(B)(xi)

     14.1 The Parties shall provide to each other Interim Number Portability
(INP) on a reciprocal basis. Pursuant to the provisions in the Act, and in
accordance with the terms and conditions outlined in Appendix PORT, which is
attached hereto and incorporated herein, SWBT will provide DTI Interim Number
Portability through Remote Call Forwarding and Direct Inward Dialing technology
until Permanent Number Portability is implemented.

     14.2 Once Permanent Number Portability is implemented, either Party may
withdraw, at any time and at its sole discretion, its INP offerings, subject to
thirty (30) day's advance notice to the other Party to allow the seamless and
transparent conversion of INP end user numbers to Permanent Number Portability.

15.0 DIALING PARITY--SECTION 251(b)(3); 271(c)(2)(B)(xii); and 271(e)(2)

     15.1 The Parties shall provide Local Dialing Parity to each other as
required under Section 251 (b)(3) of the Act.

     15.2 SWBT shall provide IntraLATA Dialing Parity in accordance with
Section 271(e)(2) of the Act.

16.0 ACCESS TO RIGHTS-OF-WAY - SECTION 251(b)(4) and 271(c)(2)(B)(iii)

     Each Party shall provide the other Party access to its poles, ducts,
rights-of-way and conduits it owns or controls in accordance with Section 224
of the Act on terms, conditions and prices comparable to those offered to any
other entity pursuant to each Party's applicable tariffs and/or standard
agreements.


<PAGE>   26





17.0 DATABASE ACCESS--SECTION 271(c)(2)(B)(x)

     In accordance with Section 27(c)(2)(B)(x) of the Act, SWBT shall provide
DTI with nondiscriminatory access to databases and associated signaling
necessary for call routing and completion. When requesting access to databases
not otherwise provided for in this Agreement, or appropriate interfaces,
regardless of whether they constitute unbundled Network Elements, DTI will use
the Network Element Bona Fide Request process. This process is defined in
Appendix UNE, which is attached hereto and incorporated herein by reference.

18.0 INTERCEPT REFERRAL ANNOUNCEMENTS

     18.1 The Party formerly providing service to an end user shall provide a
Basic Referral announcement, reciprocally and free of charge on the abandoned
telephone number.  The announcement states that the called number has been
disconnected or changed and provides the end user's new telephone number to the
extent that it is listed.

     (a) Basic Intercept Referral Announcements are to be provided on
residential numbers for a minimum of thirty (30) days where facilities exist
and the threat of telephone number exhaustion is not imminent.

     (b) Basic Intercept Referral Announcements for a single line business end
user and the primary listed telephone number for DID and "Centrex-type" end
users, shall be available for a minimum of thirty (30) days or the life of the
White Pages directory, whichever is greater. If the threat of telephone number
exhaustion becomes imminent for a particular Central Office, the service
provider may reissue a disconnected number prior to the expiration of the
directory, but no earlier than thirty (30) days after the disconnection of the
business telephone number.

19.0 COORDINATED REPAIR CALLS

     19.1 To avoid and minimize the potential for end user confusion, each
Party shall inform their respective end users of their respective repair bureau
telephone number(s) to access such bureaus.  In the event that either Party
receives a misdirected repair call, the Parties agree to employ the following
procedures for handling such calls:

     (a) To the extent the correct provider can be determined, misdirected
repair calls will be referred to the proper provider of local exchange service
in a courteous manner, at no charge, and the end user will be provided the
correct contact telephone number.

     (b)  In responding to repair calls, neither Party shall make disparaging
remarks about each other, nor shall they use these repair calls as the basis for
internal referrals or to solicit customers or to market services, nor


<PAGE>   27





shall they initiate extraneous communications beyond the direct referral to the
correct repair telephone number.

20.0 OTHER SERVICES 271(c)(B)(2)(vii) and 271(c)(2)(B)(viii)

     20.1 WHITE PAGES. In accordance with Section 271 (c)(2)(B)(viii) of the
Act, SWBT will make nondiscriminatory access to White Pages service available
under the terms and conditions of Appendix WP, attached hereto and incorporated
by reference.

     20.2 CALLING NAME INFORMATION. The Parties shall provide, on mutually
agreeable and reciprocal terms, each other with access to Calling Name
information of their respective end users whenever one Party initiates a query
from a Signaling System Point for such information associated with a call
terminating to an end user who subscribes to a calling name service. SWBT will
provide Calling Name Information in accordance with and under the terms and
conditions of Appendix CNAM, attached hereto and incorporated by reference.

     20.3 BILLING/COLLECTING/REMITTING. The Parties will jointly agree to terms
and conditions for Billing, Collecting and Remitting for alternated billed
local message as described in Appendix BCR, attached hereto and incorporated by
reference.

     20.4 911 AND E911 SERVICES. Pursuant to Section 271 (c)(2)(B)(vii) of the
Act, SWBT will make nondiscriminatory access to 911 and E911 services available
under the terms and conditions of Appendix 911, attached hereto and
incorporated by reference.

     20.5 DIRECTORY ASSISTANCE (DA). Pursuant to Section 271 (c)(2)(B)(vii)(II)
of the Act, SWBT will provide nondiscriminatory access to DA services under the
terms and conditions identified in Appendix DA, attached hereto and
incorporated by reference.

     20.6 OPERATOR SERVICES. Pursuant to Section 271 (c)(2)(B)(vii)(III) of the
Act, SWBT shall provide nondiscriminatory access to Operator Services under the
terms and conditions identified in Appendix OS, attached hereto and
incorporated by reference.

     20.7 CLEARINGHOUSE SERVICES. To the extent requested by DTI, SWBT shall
provide for the tracking of message revenues from certain messages to
facilitate the transfer of revenues between the billing company the earning
company through the Clearinghouse Services provided by SWBT pursuant to the
terms and conditions in Appendix CH, attached hereto and incorporated by
reference.

     20.8 HOSTING. At DTI's request, SWBT shall perform hosting
responsibilities for the provision of billable message data and/or access usage
data received from an DTI for distribution to the appropriate billing and/or
processing location or for delivery to an DTI of such data via SWBT's internal
network or the nationwide CMDS network pursuant to Appendix HOST, attached
hereto and incorporated by reference.


<PAGE>   28




     20.9 SIGNALING SYSTEM 7 INTERCONNECTION. At DTI's request, SWBT shall
perform SS7 interconnection services for DTI pursuant to Appendix SS7, attached
hereto and incorporated by reference.

21.0 GENERAL RESPONSIBILITIES OF THE PARTIES

     21.1 SWBT and DTI shall each use their best efforts to meet the
Interconnection Activation Dates.

     21.2 Each Party is individually responsible to provide facilities within
its network that are necessary for routing, transporting, measuring, and
billing traffic from the other Party's network and for delivering such traffic
to the other Party's network in the standard format compatible with SWBT's
network as referenced in Bellcore's BOC Notes on LEC Networks Practice No.
SR-TSV-002275, and to terminate the traffic it receives in that standard format
to the proper address on its network.  The Parties are each solely responsible
for participation in and compliance with national network plans, including the
National Network Security Plan and the Emergency Preparedness Plan.

     21.3 Neither Party shall use any service related to or use any of the
services or elements provided in this Agreement in any manner that interferes
with other persons in the use of their service, prevents other persons from
using their service, or otherwise impairs the quality of service to other
carriers or to either Party's end users, and either Party may discontinue or
refuse service, but only for so long as the other Party is violating this
provision.  Upon such violation, either Party shall provide the other Party
notice of the violation at the earliest practicable time.

     21.4 Each Party is solely responsible for the services it provides to its
end users and to other Telecommunications Carriers.

     21.5 The Parties shall work cooperatively to minimize fraud associated
with third-number billed calls, calling card calls, and any other services
related to this Agreement.

     21.6 At all times during the term of this Agreement, each Party shall keep
and maintain in force at each Party's expense all insurance required by law
(e.g. workers' compensation insurance) as well as general liability insurance
for personal injury or death to any one person, property damage resulting from
any one incident, automobile liability with coverage for bodily injury for
property damage. Upon request from the other Party, each Party shall provide to
the other Party evidence of such insurance (which may be provided through a
program of self insurance).

     21.7 In addition to its indemnity obligations under Section 26.0, each
Party shall provide, in its tariffs and contracts with its end users that relate
to any Telecommunications Service provided or contemplated under this Agreement,
that in no case shall such Party or any of its agents, contractors or others
retained by such parties be liable to any end user or third party


<PAGE>   29





for (i) any Loss relating to or arising out of this Agreement, whether in
contract or tort, that exceeds the amount such Party would have charged the
applicable end user for the service(s) or function(s) that gave rise to such
Loss, and (ii) any Consequential Damages.

     21.8 Unless otherwise stated, each Party will render a monthly bill to the
other for service(s) provided hereunder. Remittance in full will be due within
thirty (30) days of that billing date. Interest shall apply on overdue amounts
(other than disputed amounts which are subject to Section 30.12) at the rate
specified in Section 30.12, unless otherwise specified in an applicable tariff.
Each Party reserves the right to net delinquent amounts against amounts
otherwise due the other.

     21.9 SWBT is participating with the industry to develop standardized
methods through the OBF and shall implement ordering and billing
formats/processes consistent with industry guidelines as capabilities are
deployed.  Where such guidelines are not available or SWBT decides not to fully
utilize industry guidelines, SWBT will provide DTI with information on its
ordering and billing format/process and requirements at the earliest
practicable time.

22.0 EFFECTIVE DATE, TERM, AND TERMINATION

     22.1 This Agreement shall be effective ten (10) days after approval by the
Commission when it has determined that the Agreement complies with Sections 251
and 252 of the Act ("Effective Date").

     22.2 The initial term of this Agreement shall be one (1) year (the "Term")
which shall commence on the Date of Execution. Absent the receipt by one Party
of written notice from the other Party at least sixty (60) days prior to the
expiration of the Term to the effect that such Party does not intend to extend
the Term of this Agreement, this Agreement shall automatically renew and remain
in full force and effect on and after the expiration of the Term until
terminated by either Party pursuant to Section 22.3, below.

     22.3 Either Party may terminate this Agreement in the event that the other
Party fails to perform a material obligation that disrupts the operation of
either Party's network and/or end user service and fails to cure such material
nonperformance within forty-five (45) days after written notice thereof.

     22.4 If pursuant to Section 22.2, above, this Agreement continues in full
force and effect after the expiration of the Term, either Party may terminate
this Agreement ninety (90) days after delivering written notice to the other
Party of its intention to terminate this Agreement, subject to Section 22.5,
below. Neither Party shall have any liability to the other Party for
termination of this Agreement pursuant to this Section 22.4 other than its
obligations under Section 22.5, below.

     22.5 Upon termination or expiration of this Agreement in accordance with
this Section 22.0, above:


<PAGE>   30




     (a) each-Party shall comply immediately with its obligations set forth in
Section 30.6, below; and

     (b) each Party shall promptly pay all amounts (including any late payment
charges) owed under this Agreement; and

     (c) each Party 's indemnification obligations shall survive.

     22.6 If upon expiration or termination, the Parties are negotiating a
successor agreement; during such period, each Party shall continue to perform
its obligations and provide the services described herein that are to be
included in the successor agreement until such time as the latter agreement
becomes effective; provided however, that if the Parties are unable to reach
agreement within six (6) months after termination or expiration of this
Agreement, either Party has the right to submit this matter to the Commission
for resolution. Until a survivor agreement is reached or the Commission
resolves the matter, whichever is sooner, the terms, conditions, rates, and
charges stated herein will continue to apply, subject to a true-up based on the
Commission action, if any.

     22.7 Except as set forth in Section 28.5, below, no remedy set forth in
this Agreement is intended to be exclusive and each and every remedy shall be
cumulative and in addition to any other rights or remedies now or hereafter
existing under applicable law or otherwise.

23.0 DISCLAIMER OF REPRESENTATIONS AND WARRANTIES

     EXCEPT AS EXPRESSLY PROVIDED UNDER THIS AGREEMENT, NO PARTY MAKES OR
RECEIVES ANY WARRANTY, EXPRESS OR IMPLIED, WITH RESPECT TO THE SERVICES,
FUNCTIONS AND PRODUCTS IT PROVIDES UNDER OR CONTEMPLATED BY THIS AGREEMENT AND
THE PARTIES DISCLAIM THE IMPLIED WARRANTIES OF MERCHANTABILITY OR OF FITNESS
FOR A PARTICULAR PURPOSE. ADDITIONALLY, NEITHER SWBT NOR DTI ASSUMES
RESPONSIBILITY WITH REGARD TO THE CORRECTNESS OF DATA OR INFORMATION SUPPLIED
BY THE OTHER WHEN THIS DATA OR INFORMATION IS ACCESSED AND USED BY A THIRD
PARTY.

24.0 CHANGES IN END USER LOCAL EXCHANGE SERVICE PROVIDER SELECTION

     Each Party will abide by applicable state or federal laws and regulations
in obtaining end user authorization prior to changing end user's local service
provider to itself and in assuming responsibility for any applicable charges as
specified in Section 258 (b) of the Telecommunications Act of 1996.  The
Parties shall make authorization available to each other upon request and at no
charge. Only an end user can initiate a challenge to a change in its local
exchange service provider.  If an end user notifies SWBT or DTI that the end
user requests local


<PAGE>   31




exchange service, the Party receiving such request shall be free to immediately
provide service to such end user.  When an end user changes or withdraws
authorization, each Party shall release customer-specific facilities in
accordance with the end user's direction or the end user's authorized agent.
Further, when an end user abandons the premise, SWBT is free to reclaim the
unbundled network element facilities for use by another customer and is free to
issue service orders required to reclaim such facilities.

25.0 SEVERABILITY

     25.1 The Parties negotiated the services, arrangements, Interconnection,
terms and conditions of this Agreement by the Parties as a total arrangement
and are intended to be nonseverable, subject only to Section 30.16 of this
Agreement.

     25.2 In the event the Commission, the FCC, or a court rejects any portion
or determines that any provision of this Agreement is contrary to law, or is
invalid or unenforceable for any reason, the Parties shall continue to be bound
by the terms of this Agreement, insofar as possible, except for the portion
rejected or determined to be unlawful, invalid, or unenforceable. In such
event, the Parties shall negotiate in good faith to replace the rejected,
unlawful, invalid, or unenforceable provision and shall not discontinue service
to the other party during such period if to do so would disrupt existing
service being provided to an end user. Nothing in this Agreement shall be
construed as requiring or permitting either Party to contravene any mandatory
requirement of federal or state law, or any regulations or orders adopted
pursuant to such law.

26.0 INTELLECTUAL PROPERTY

     LSP is responsible for obtaining any license or right to use agreement
associated with a Unbundled Network Element purchased from SWBT.  SWBT will
provide a list of all known and necessary licenses or right to use agreements
applicable to the subject Network Element(s) within seven days of a request for
such a list by LSP.  SWBT agrees to use its best efforts to facilitate the
obtaining of any necessary license or right to use agreement.  SWBT makes no
warranties, express or implied, concerning LSP's (or any third party's) rights
with respect to intellectual property (including with limitation, patent,
copyright, and trade secret rights) or contract rights associated with LSP's
rights to interconnect with SWBT's network and to Unbundled Network Elements.

27.0. INDEMNIFICATION

     27.1 Except as otherwise provided herein or in specific appendices, each
Party shall be responsible only for service(s) and facility(ies) which are
provided by that Party, its authorized agents, subcontractors, or others
retained by such parties, and neither Party shall bear any responsibility for
the service(s) and facility(ies) provided by the other Party, its agents,
subcontractors, or others retained by such parties.


<PAGE>   32




     27.2 Except as otherwise provided herein or in specific appendices, and to
the extent not prohibited by law and not otherwise controlled by tariff, each
Party (the "Indemnifying Party") shall defend and indemnify the other Party
(the "Indemnified Party") and hold such Indemnified Party harmless against any
Loss to a third party arising out of the negligence or willful misconduct by
such Indemnifying Party, its agents, its end user, contractors, or others
retained by such parties, in connection with the indemnifying provision of
services or functions under this Agreement.

     27.3 In the case of any Loss alleged or made by an end user of either
Party, the Party whose end user alleged or made such Loss (Indemnifying Party)
shall defend and indemnify the other Party (Indemnified Party) against any and
all such claims or Loss by its end users regardless of whether the underlying
service was provided or unbundled element was provisioned by the Indemnified
Party, unless the Loss was caused by the gross negligence or intentional
misconduct of the other (Indemnified) Party.

     27.4 LSP agrees to indemnify, defend and hold harmless SWBT from any Loss
arising out of SWBT's provision of 911 services or out of LSP's end users' use
of the 911 service, whether suffered, made, instituted, or asserted by LSP or
its end users, including for any personal injury or death of any person or
persons, except for Loss which is the direct result of SWBT's own negligence or
willful misconduct.

     27.5 Each Party shall be indemnified, defended and held harmless by the
other Party against any Loss arising from a Party's use of services or elements
provided under this Agreement involving: tort claims, including claims for
libel, slander, invasion of privacy, or infringement of copyright arising from
a Party's own communications or the communications of its end users.

     27.6 SWBT shall be indemnified, defended, and held harmless by the LSP for
claims for patent, trademark, infringement or other infringement or
intellectual property rights, arising from the LSP's use of services or
unbundled elements provided under this Agreement.

     27.7 The Indemnifying Party agrees to defend any suit brought against the
Indemnified Party for any Loss identified in this Section or specific
appendices.  The Indemnified Party agree to notify the Indemnifying Party
promptly in writing of any written claims, lawsuits or demands for which the
Indemnifying Party may be responsible under this Agreement.  The Indemnified
Party shall cooperate in every reasonable way to facilitate defense or
settlement. The Indemnifying Party shall have the right to control and conduct
the defense and settlement of any action or claim subject to the consultation
of the Indemnified Party.  The Indemnifying Party shall not be responsible for
any settlement unless the Indemnifying Party approved such settlement in
advance and agrees to be bound by the settlement agreement.


<PAGE>   33




28.0 LIMITATION OF LIABILITY

     28.1 Except for indemnity obligations under this Agreement, or except as
otherwise provided in specific appendices, each Party's liability to the other
Party for any Loss relating to or arising out of any negligent act or omission
in its performance under this Agreement, whether in contract or tort, shall not
exceed in total the amount SWBT or LSP has to or would have charged the other
Party for the affected service(s) or function(s) which were not performed or
were otherwise improperly performed.

     28.2 Except for Losses alleged or made by an end user of either Party, or
except as otherwise provided in specific appendices, in the case of any Loss
alleged or made by a third party arising under the negligence or willful
misconduct of both Parties, each Party shall bear, and its obligation under
this section shall be limited to, that portion (as mutually agreed to by the
Parties) of the resulting expense caused by its own negligence or willful
misconduct or that of its agents, servants, contractors, or others acting in
aid or concert with it.

     28.3 In no event shall either Party have any liability whatsoever to the
other Party for any indirect, special, consequential, incidental, or punitive
damages, including but not limited to, loss of anticipated profits or revenue
or other economic loss in connection with or arising from anything said,
omitted, or done hereunder (collectively, "Consequential Damages"), even if the
other Party has been advised of the possibility of such damages; provided that
the foregoing shall not limit a Party's obligation under this Agreement to
indemnify, defend, and hold the other Party harmless against any amounts
payable to a third party, including any losses, costs, fines, penalties,
criminal or civil judgments or settlements, expenses (including attorney's
fees) and Consequential Damages of such third party.

29.0 LIQUIDATED DAMAGES FOR SPECIFIED ACTIVITIES

     29.1 CERTAIN DEFINITIONS. When used in this Section 29.0, the following
terms shall have the meanings indicated:

          29.1.1 "SPECIFIED PERFORMANCE BREACH" means the failure by SWBT to
     meet the Performance Criteria for any Specified Activity for a period of
     three (3) consecutive calendar months.

          29.1.2 "Specified Activity" means any of the following activities:

          (i)   the installation by SWBT of unbundled elements associated with
                DTI end user Lines;

          (ii)  SWBT's provision of Interim Number Portability; or

          (iii) the repair of out of service problems for DTI ("Out of Service
                Repairs").


<PAGE>   34




     29.1.3 "Performance Criteria" means, with respect to each calendar month
during the term of this Agreement, the performance by SWBT during such month of
each Specified Activity shown below within the time interval shown in at least
eighty percent (80%) of the covered instances:

<TABLE>
<CAPTION>
     SPECIFIED ACTIVITY              PERFORMANCE INTERVAL DATE
     (i) DTI END USER LINES
    <S>                              <C>
    1-l0 Lines per Service Order     five (5) business days from SWBT's
                                     Receipt of valid Service Order

    11-20 Lines per Service Order    ten (10) business days from SWBT's
                                     Receipt of valid Service Order

    21+ Lines per Service Order      To Be Negotiated

    (ii) INTERIM NUMBER PORTABILITY

    1-10 Numbers per Service Order   five (5) business days from SWBT's
                                     Receipt of valid Service Order

    11-20 Numbers per Service Order  ten (10) business days from SWBT's
                                     Receipt of valid Service Order

    21+ Numbers per Service Order    To be Negotiated

    (iii) OUT-OF-SERVICE REPAIRS     Less than twenty-four (24) hours from
                                     SWBT's Receipt of Notification of Out-
                                     of-Service Condition
</TABLE>

     29.2 SPECIFIED PERFORMANCE BREACH. In recognition of the: (1) loss of end
user opportunities, revenues and goodwill which DTI might sustain in the event
of a Specified Performance Breach; (2) the uncertainty, in the event of such a
Specified Performance Breach, of DTI having available to it customer
opportunities similar to those opportunities currently available to DTI; and
(3) the difficulty of accurately ascertaining the amount of damages DTI would
sustain in the event of such a Specified Performance Breach, SWBT agrees to pay
DTI, subject to Section 29.4 below, damages as set forth in Section 29.3 below
in the event of the occurrence of a Specified Performance Breach.

     29.3 LIQUIDATED DAMAGES. The damages payable by SWBT to DTI as a result of
a Specified Performance Breach shall be $25,000 for each Specified Performance
Breach (collectively, the "Liquidated Damages"). DTI and SWBT agree and
acknowledge that: (a) the


<PAGE>   35




Liquidated Damages are not a penalty and have been determined based upon the
facts and circumstances of DTI and SWBT at the time of the negotiation and
entering into of this Agreement, with due regard given to the performance
expectations of each Party; (b) the Liquidated Damages constitute a reasonable
approximation of the damages DTI would sustain if its damages were readily
ascertainable; and (c) DTI shall not be required to provide any proof of the
Liquidated Damages.

     29.4 LIMITATIONS. In no event shall SWBT be liable to pay the Liquidated
Damages if SWBT's failure to meet or exceed any of the Performance Criteria is
caused, directly or indirectly, by a Delaying Event. A "Delaying Event" means:
(a) a failure by DTI to perform any of its obligations set forth in this
Agreement (including, without limitation, the Implementation Schedule and the
Joint Implementation Process); (b) any delay, act or failure to act by an end
user, agent or subcontractor of DTI; (c) any Force Majeure Event; or (d) for
INP, where memory limitations in the switch in the SWBT serving office cannot
accommodate the request. If a Delaying Event: (i) prevents SWBT from performing
a Specified Activity, then such Specified Activity shall be excluded from the
calculation of SWBT's compliance with the Performance Criteria; or (ii) only
suspends SWBT's ability to timely perform the Specified Activity, the
applicable time frame in which SWBT's compliance with the Performance Criteria
is measured shall be extended on an hour-for-hour or day-for-day basis, as
applicable, equal to the duration of the Delaying Event.

     29.5 SOLE REMEDY. The Liquidated Damages shall be the sole and exclusive
remedy of DTI for SWBT's breach of the Performance Criteria or a Specified
Performance Breach as described in this Section 28.0 and shall be in lieu of
any other damages or credit DTI might otherwise seek for such breach of the
Performance Criteria or a Specified Performance Breach through any claim or
suit brought under any contract or tariff.

     29.6 RECORDS. SWBT shall maintain complete and accurate records, on a
monthly basis, of its performance under this Agreement of each Specified
Activity and its compliance with the Performance Criteria. SWBT shall provide
to DTI such records in a self-reporting format on a monthly basis.
Notwithstanding Section 31.6.1, below, the Parties agree that such records
shall be deemed "Proprietary Information" under Section 31.6, below.

30.0 REGULATORY APPROVAL

     30.1 The Parties understand and agree that this Agreement will be filed
with the Commission and may thereafter be filed with the FCC. The Parties
believe in good faith and agree that the services to be provided under this
Agreement satisfy the specifically mentioned sections of the Act and are in the
public interest. Each Party covenants and agrees to fully support approval of
this Agreement by the Commission or the FCC under Section 252 of the Act
without modification.

      30.2 The Parties agree that the performance of the terms of this
           Agreement will satisfy SWBT's obligation to provide Interconnection
           under Section 251 of the Act, and the


<PAGE>   36




requirements of the Competitive Checklist, under Section 271 of the Act. DTI
represents that it is, or intends to become, a provider of Telephone Exchange
Service to residential and business subscribers offered exclusively over its
own Telephone Exchange Service facilities or predominantly over its own
Telephone Exchange Service facilities in combination with the use of unbundled
Network Elements purchased from another entity and the resale of the
Telecommunications Services of other carriers.


31.0  MISCELLANEOUS

      31.1  AUTHORIZATION.


      (a) SWBT is a corporation duly organized, validly existing and in good
standing under the laws of the State of Missouri and has full power and
authority to execute and deliver this Agreement and to perform the obligations
hereunder.

      (b) DTI is a corporation duly organized, validly existing and in good
standing under the laws of the State of Oklahoma and has full power and
authority to execute and deliver this Agreement and to perform its obligations
hereunder.

      31.2 COMPLIANCE AND CERTIFICATION.

      31.2.1 Each Party shall comply with all federal, state, and local laws,
rules, and regulations applicable to its performance under this Agreement.

      31.2.2 Each Party warrants that it has obtained all necessary state
certification required in those states in which it has ordered services from
the other Party pursuant to this Agreement. Upon request by any state
governmental entity, each Party shall provide proof of certification.

      31.2.3 Each Party represents and warrants that any equipment, facilities
or services provided to the other Party under this Agreement comply with the
Communications Law Enforcement Act ("CALEA").  Each Party shall indemnify and
hold the other Party harmless from any and all penalties imposed upon the other
Party for such noncompliance and shall at the non-compliant Party's sole cost
and expense, modify or replace any equipment, facilities or services provided
to the other Party under this Agreement to ensure that such equipment,
facilities and services fully comply with CALEA.

      31.3  LAW ENFORCEMENT.

      31.3.1  SWBT and DTI shall handle law enforcement requests as follows:



<PAGE>   37




     (a) Intercept Devices: Local and federal law enforcement agencies
periodically request information or assistance from local telephone service
providers. When either Party receives a request associated with an end user of
the other Party, it shall refer such request to the Party that serves such end
user, unless the request directs the receiving Party to attach a pen register,
trap-and-trace or form of intercept on the Party's facilities, in which case
that Party shall comply with any valid request.

     (b) Subpoenas: If a Party receives a subpoena for information concerning
an end user the Party knows to be an end user of the other Party, it shall
refer the subpoena to the requesting party with an indication that the other
Party is the responsible company, unless the subpoena requests records for a
period of time during which the Party was the end user's service provider, in
which case the Party will respond to any valid request.

     (c) Emergencies: If a Party receives a request from a law enforcement
agency for temporary number change, temporary disconnect, or one-way denial of
outbound calls for an end user of the other Party by the receiving Party's
switch, that Party will comply with an valid emergency request.  However,
neither Party shall be held liable for any claims or damages arising from
compliance with such requests on behalf of the other Party's end user and the
Party serving such end user agrees to indemnify and hold the other Party
harmless against any and all such claims.

     31.4 INDEPENDENT CONTRACTOR. Each Party and each Party's contractor shall
be solely responsible for the withholding or payment of all applicable federal,
state and local income taxes, social security taxes and other payroll taxes
with respect to its employees, as well as any taxes, contributions or other
obligations imposed by applicable state unemployment or workers' compensation
acts.  Each Party has sole authority and responsibility to hire, fire and
otherwise control its employees.

     31.5 FORCE MAJEURE. Neither Party shall be liable for any delay or failure
in performance of any part of this Agreement from any cause beyond its control
and without its fault or negligence including, without limitation, acts of
nature, acts of civil or military authority, government regulations, embargoes,
epidemics, terrorist acts, riots, insurrections, fires, explosions, earthquakes,
nuclear accidents, floods, work stoppages, equipment failure, cable cuts, power
blackouts, volcanic action, other major environmental disturbances, unusually
severe weather conditions, inability to secure products or services of other
persons or transportation facilities or acts or omissions of transportation
carriers In such event, the Party affected shall, upon giving prompt notice to
the other Party, be excused from such performance on a day-to-day basis to the
extent of such interference (and the other Party shall likewise be excused from

<PAGE>   38



performance of its obligations on a day-for-day basis to the extent such
Party's obligations related to the performance so interfered with). The
affected Party shall use its best efforts to avoid or remove the cause of
nonperformance and both Parties shall proceed to perform with dispatch once the
causes are removed or cease.

     31.6 CONFIDENTIALITY.

     31.6.1 All information, including but not limited to specifications,
microfilm, photocopies, magnetic disks, magnetic tapes, drawings, sketches,
models, samples, tools, technical information, data, employee records, maps,
financial reports, and market data; (i) furnished by one Party (the "Disclosing
Party") to the other Party (the "Receiving Party") dealing with
customer-specific, facility-specific, or usage-specific information, other than
customer information communicated for the purpose of publication or directory
database inclusion, 911, call processing, billing or settlement or as otherwise
mutually agreed upon; or (ii) in written, graphic, electromagnetic, or other
tangible form and marked at the time of delivery as "Confidential" or
"Proprietary;" or (iii) communicated orally and declared to the Receiving Party
at the time of delivery, or by written notice given to the Receiving Party
within ten (10) days after declaration to be "Confidential" or "Proprietary"
(collectively referred to as "Proprietary Information"), shall remain the
property of the Disclosing Party.

     31.6.2 Upon request by the Disclosing Party, the Receiving Party shall
return all tangible copies of Proprietary Information, whether written,
graphic, or otherwise.  In the event of the expiration or termination of this
Agreement for any reason whatsoever, each Party shall return to the other Party
or destroy all Proprietary Information and other documents, work papers and
other material (including all copies thereof) obtained from the other Party in
connection with this Agreement.

     31.6.3 Each Party shall keep all the other Party's Proprietary Information
confidential in the same manner in which it keeps its own Proprietary
Information confidential, and shall use the other Party's Proprietary
Information only for performing the covenants contained in the Agreement and
shall disclose such Proprietary Information only to those employees,
contractors, agents or Affiliates who have a need to know.  Neither Party shall
use the other Party's Proprietary Information for any other purpose except upon
such terms and conditions as may be agreed upon between the Parties in writing.

     31.6.4 Unless otherwise agreed, the obligations of confidentiality and
nonuse set forth in the Agreement do not apply to such Proprietary Information
that:

     (a) was at the time of receipt, already known to the Receiving Party, free
of any obligation to keep confidential and evidenced by written records
prepared prior to delivery by the Disclosing Party;

     (b) is, or becomes publicly known through no wrongful act of the receiving
Party;


<PAGE>   39




     (c) is rightfully received from a third person having no direct or
indirect secrecy or confidentiality obligation to the Disclosing Party with
respect to such information;

     (d) is independently developed by an employee, agent, or contractor of the
Receiving Party which individual is not involved in any manner with the
provision of services pursuant to the Agreement and does not have any direct or
indirect access to the Proprietary Information;

     (e) is disclosed to a third person by the Disclosing Party without similar
restrictions on such third person's rights;

     (f) is approved for release by written authorization of the Disclosing
Party;

     (g) is required to be made public by the Receiving Party pursuant to
applicable law or regulation provided that the Receiving party shall provide
the Disclosing Party with written notice of such requirement as soon as
possible and prior to such disclosure.  The Disclosing Party may then either
seek appropriate protective relief from all or part of such requirement or, if
it fails to successfully do so, it shall be deemed to have waived the Receiving
Party's compliance with Section 31.6 with respect to all or part of such
requirement.  The Receiving Party shall use all commercially reasonable efforts
to cooperate with the Disclosing Party in attempting to obtain any protective
relief which such Disclosing Party chooses to obtain.  Notwithstanding the
foregoing, SWBT shall be entitled to disclose confidential information on a
confidential basis to regulatory agencies upon request for information as to
SWBT's activities under the Act.

     31.6.5 Notwithstanding any other provision of this Agreement, the
Proprietary Information provisions of this Agreement shall apply to all
information furnished by either Party to the other in furtherance of the
purpose of this Agreement, even if furnished before the date of this Agreement.

     31.6.6 Pursuant to Section 222(b) of the Act, both parties agree to limit
their use of Proprietary Information received from the other to the permitted
purposed identified in the Act.

     31.7 GOVERNING LAW. For all claims under this Agreement that are based
upon issues within the jurisdiction (primary or otherwise) of the FCC, the
exclusive jurisdiction and remedy for all such claims shall be as provided for
by the FCC and the Act.  For all claims under this Agreement that are based
upon issues within the jurisdiction (primary or otherwise) of the Commission,
the exclusive jurisdiction for all such claims shall be with such Commission,
and


<PAGE>   40




the exclusive remedy for such claims shall be as provided for by such
Commission.  In all other respects, this Agreement shall be governed by the
domestic laws of the State of Missouri without reference to conflict of law
provisions.

     31.8 TAXES.

     31.8.1 Each Party purchasing services hereunder shall pay or otherwise be
responsible for all federal, state, or local sales, use, excise, gross
receipts, transaction or similar taxes, fees, or surcharges (hereinafter "Tax")
imposed on or with respect to the services provided by or to such Party, except
for any Tax on either party's corporate existence, status, or income. Whenever
possible, these amounts shall be billed as a separate item on the invoice.  To
the extent a sale is claimed to be for resale tax exemption, the purchasing
party shall furnish the providing party a proper resale tax exemption
certificate as authorized or required by statute or regulation by the
jurisdiction providing said resale tax exemption.  Failure to timely provide
said resale tax exemption certificate will result in no exemption being
available to the purchasing Party until such time as the purchasing Party
presents a valid certification.  Failure to timely provide said resale tax
exemption certificate will result in no exemption being available to the
purchasing Party until such time as the purchasing Party presents a valid
certificate.

     31.8.2 With respect to any purchase of services, facilities or other
arrangements, if any Tax is required or permitted by applicable law to be
collected from the purchasing party by the providing party, then: (i) the
providing party shall bill the purchasing party for such Tax; (ii) the
purchasing party shall remit such Tax to the providing party; and (iii) the
providing party shall remit such collected Tax to the applicable taxing
authority.

     31.8.3 With respect to any purchase hereunder of services, facilities or
arrangements that are resold to a third party, if any Tax is imposed by
applicable law on the end user in connection with any such purchase, then: (i)
the purchasing party shall be required to impose and/or collect such Tax from
the end user; and (ii) the purchasing party shall remit such Tax to the
applicable taxing authority.  The purchasing party agrees to indemnify and hold
harmless the providing party on an after-tax basis for any costs incurred by
the providing party as a result of actions taken by the applicable taxing
authority to collect the Tax from the providing party due to the failure of the
purchasing party to pay or collect and remit such tax to such authority.

     31.8.4 If the providing party fails to collect any Tax as required herein,
then, as between the providing party and the purchasing party: (i) the
purchasing party shall remain liable for such uncollected Tax; and (ii) the
providing party shall be liable for any penalty and interest assessed with
respect to such uncollected Tax by such authority.  However, if the purchasing
party fails to pay any taxes properly billed, then, as between the providing
party and the purchasing party, the purchasing party will be solely responsible
for payment of the taxes, penalty and interest.


<PAGE>   41




     31.8.5 If the purchasing party fails to impose and/or collect any Tax from
end users as required herein, then, as between the providing party and the
purchasing party, the purchasing party shall remain liable for such uncollected
Tax and any interest and penalty assessed thereon with respect to the
uncollected Tax by the applicable taxing authority.  With respect to any Tax
that the purchasing party has agreed to pay or impose on and/or collect from
end users, the purchasing party agrees to indemnify and hold harmless the
providing party on an after-tax basis for any costs incurred by the providing
party as a result of actions taken by the applicable taxing authority to
collect the Tax from the providing Party due to the failure of the purchasing
party to pay or collect and remit such Tax to such authority.

     31.9 NON-ASSIGNMENT. This Agreement shall be binding upon every subsidiary
and Affiliate of either Party that is engaged in providing Telephone Exchange
and Exchange Access services in any territory within which SWBT is an Incumbent
Local Exchange Carrier as of the date of this Agreement (the "SWBT Territory")
and shall continue to be binding upon all such entities regardless of any
subsequent change in their ownership.  Each Party covenants that, if it sells
or otherwise transfers to a third party its Telephone Exchange and Exchange
Access network facilities within the SWBT Territory, or any portion thereof, to
a third party, it will require as a condition of such transfer that the
transferee agree to be bound by this Agreement with respect to services
provided over the transferred facilities.  Except as provided in this
paragraph, neither Party may assign or transfer (whether by operation of law or
otherwise) this Agreement (or any rights or obligations hereunder) to a third
party without the prior written consent of the other Party; provided that each
Party may assign this Agreement to a corporate Affiliate or an entity under its
common control or an entity acquiring all or substantially all of its assets or
equity by providing prompt written notice to the other Party of such assignment
or transfer.  Any attempted assignment or transfer that is not permitted is
void ab initio.  Without limiting the generality of the foregoing, this
Agreement shall be binding upon and shall inure to the benefit of the Parties'
respective successors and assigns.

     31.10 NON-WAIVER. Failure of either Party to insist on performance of any
term or condition of this Agreement or to exercise any right or privilege
hereunder shall not be construed as a continuing or future waiver of such term,
condition, right or privilege.

     31.11 AUDITS. Each Party to this Agreement will be responsible for the
accuracy and quality of its data as submitted to the respective Parties
involved.

     31.11.1 Upon reasonable written notice and at its own expense, each Party
or its authorized representative (providing such authorized representative does
not have a conflict of interest related to other matters before one of the
Parties) shall have the right to conduct an audit of the other Party to give
assurances of compliance with the provisions of this Agreement; provided, that
neither Party may request more than two (2) such audits within any twelve (12)
month period.  This includes on-site audits at the other Party's or the Party's
vendor locations.  Each Party, whether or not in connection with an audit,
shall maintain reasonable records for a minimum of twenty-four (24) months and
provide the other Party with reasonable access to such information as is
necessary to determine amounts receivable or payable under this Agreement.


<PAGE>   42




Each Party's right to access information for audit purposes is limited to data
not in excess of twenty-four (24) months in age.

     31.12 DISPUTED AMOUNTS.

     31.12.1 No claims, under this Agreement or its Appendices, shall be
brought for disputed amounts more than twenty-four (24) months from the date of
occurrence which gives rise to the dispute.  Under this Section 31.12, if any
portion of an amount due to a Party (the "Billing Party") under this Agreement
is subject to a bona fide dispute between the Parties, the Party billed (the
"Non-Paying Party") shall within sixty (60) days of its receipt of the invoice
containing such disputed amount give notice to the Billing Party of the amounts
it disputes ("Disputed Amounts") and include in such notice the specific
details and reasons for disputing each item. The Non-Paying Party shall pay
when due: (i) all undisputed amounts to the Billing Party; and (ii) all
Disputed Amounts to Billing Party.

     31.12.2 If the Parties are unable to resolve the issues related to the
Disputed Amounts in the normal course of business within sixty (60) days after
delivery to the Billing Party of notice of the Disputed Amounts, each of the
Parties shall appoint a designated representative who has authority to settle
the dispute and who is at a higher level of management than the persons with
direct responsibility for administration of this Agreement.  The designated
representatives shall meet as often as they reasonably deem necessary in order
to discuss the dispute and negotiate in good faith in an effort to resolve such
dispute.

     31.12.3 If the Parties are unable to resolve issues related to the
Disputed Amounts within forty-five (45) days after the Parties' appointment of
designated representatives pursuant to Section 30.12.2, above, then either
Party may file a complaint with the Commission to resolve such issues or
proceed with any other remedy pursuant to law or equity.  The Commission may
direct release of any or all funds (including any accrued interest) in the
escrow account, plus applicable late fees, to be paid to either Party.

     31.12.4 The Parties agree that all negotiations pursuant to this Section
30.12 shall remain confidential and shall be treated as compromise and
settlement negotiations for purposes of the Federal Rules of Evidence and state
rules of evidence.

     31.12.5 Any undisputed amounts not paid when due shall accrue interest
from the date such amounts were due at the lesser of: (i) one and one-half
percent (l-1/2%) per month; or (ii) the highest rate of interest that may be
charged under applicable law.

     31.13 DISPUTE RESOLUTION.

     31.13.1 No claims shall be brought for disputes arising under this
Agreement or its Appendices more than twenty-four (24) months from the date of
occurrence which gives rise to the dispute.


<PAGE>   43




     31.13.2 For disputes other than disputed amounts under this Agreement or
its Appendices, each Party shall appoint a designated representative as set
forth in Section 31.12.2, above, and if unable to resolve the dispute, proceed
as set forth in Section 31.12.3, above.

     31.14 NOTICES. Any notice to a Party required or permitted under this
Agreement shall be in writing and shall be deemed to have been received on the
date of service if served personally; on the date receipt is acknowledged in
writing by the recipient if delivered by regular mail; or on the date stated on
the receipt if delivered by certified or registered mail or by a courier
service that obtains a written receipt. Notice may also be provided by
facsimile, which shall be effective on the next Business Day following the date
of transmission as reflected in the facsimile confirmation sheet. "Business
Day" shall mean Monday through Friday, SWBT/DTI holidays excepted.  Any notice
shall be delivered using one of the alternatives mentioned in this section and
shall be directed to the applicable address indicated below or such address as
the Party to be notified has designated by giving notice in compliance with
this section, except that notices to a Party's twenty-four (24) hour contact
number shall be by telephone and/or facsimile and shall be deemed to have been
received on the date transmitted.


<TABLE>
<CAPTION>
       NOTICE CONTACT         DTI CONTACT          SWBT CONTACT
       <S>                    <C>                  <C>
       NAME/TITLE             Richard Weinstein    Jeffrey Fields
       STREET ADDRESS         11111 Dorsett Rd.    One Bell Plaza, 525.07
       CITY, STATE, ZIP CODE  St. Louis, MO 63043  Dallas, TX 75202
       TELEPHONE NUMBER       314-253-6600         214-464-5676
       FAX NUMBER             314-253-6699         214-464-1486
</TABLE>


<TABLE>
<CAPTION>
24-HOUR NETWORK MGMT CONTACT DTI CONTACT SWBT CONTACT
<S>                   <C>                   <C>
NAME/TITLE            Alan Ducheck          NSMC Control
TELEPHONE NUMBER      314-253-6600          1-800-792-2662
FAX NUMBER            314-253-6699          1-972-301-6702
</TABLE>

31.15 PUBLICITY AND USE OF TRADEMARKS OR SERVICE MARKS.

     31.15.1 The Parties agree not to use in any advertising or sales
promotion, press releases, or other publicity matters any endorsements, direct
or indirect quotes, or pictures implying endorsement by the other Party or any
of its employees without such Party's prior written approval.  The Parties will
submit to each other for written approval, prior to publication, all publicity
matters that mention or display one another's name and/or marks or contain
language from which a connection to said name and/or marks may be inferred or
implied; the Party to whom a request is directed shall respond promptly.
Nothing herein, however, shall be construed as preventing either Party from
publicly stating the fact that it has executed this Agreement with the other
Party.


<PAGE>   44




        31.15.2 Nothing in this Agreement shall grant, suggest, or imply any
authority for one Party to use the name, trademarks, service marks, or trade
names of the other for commercial purposes without prior written approval.

        31.16 SECTION 252(i) OBLIGATIONS. If either Party enters into an
agreement (the "Other Agreement") approved by the Commission or FCC pursuant to
Section 252 of the Act (regardless of whether the approved agreement was
negotiated or arbitrated) which provides for the provision of arrangements
covered in this Agreement to another requesting Telecommunications Carrier,
including an Affiliate, such Party shall make available to the other Party such
arrangements upon the same rates, terms and conditions as those provided in the
Other Agreement. At its sole option, the other Party may avail itself of
either: (i) the Other Agreement in its entirety; or (ii) the prices, terms and
conditions of the Other Agreement that directly relate to any of the following
duties as a whole:

     (a) Interconnection - Section 251(c)(2); 252(d)(1); and 271(c)(2)(B(i) of
the Act; or

     (b) Exchange Access - Section 251(c)(2) and 271(c)(2)(B)(ii) of the Act;
or

     (c) Unbundling - Section 251(c)(3) and 271(c)(2)(B)(ii) of the Act; or

     (d) Resale - Section 251(c)(4) and 271(c)(2)(B)(xiv) of the Act; or

     (e) Collocation - Section 251(c)(6) and 271(c)(2)(B)(i) of the Act; or

     (f) Number Portability - Section 251(b)(2) and 271(c)(2)(B)(xi) of the
Act; or

     (g) Database Access - Section 271(c)(2)(B)(x) of the Act; or

     (h) Access to Rights of Way - Section 251(b)(4) and 271(c)(2)(B)(iii) of
the Act; or

     (i) Operator Services - Section 271(c)(2)(B)(vii)(III); or

     (j) Directory Assistance - Section 271(c)(2)(B)(vii)(II).

        31.17 JOINT WORK PRODUCT. This Agreement is the joint work product of
the Parties and has been negotiated by the Parties and their respective counsel
and shall be fairly interpreted in accordance with its terms and, in the event
of any ambiguities, no inferences shall be drawn against either Party.

        31.18 INTERVENING LAW. This Agreement is entered into as a result of
both private negotiation between the Parties and the incorporation of some of
the results of arbitration by the Commission. If the actions of Oklahoma or
federal legislative bodies, courts, or regulatory agencies of competent
jurisdiction invalidate, modify, or stay the enforcement of laws or regulations
that were the basis for a provision of the contract which is reflective of the


<PAGE>   45



Arbitration Award approved by the Commission, the affected provision
shall be invalidated, modified, or stayed, consistent with the action of the
legislative body, court, or regulatory agency.  In such event, the Parties
shall expend diligent efforts to arrive at an agreement respecting the
modifications to the Agreement. If negotiations fail, disputes between the
Parties concerning the interpretation of the actions required or provisions
affected by such governmental actions shall be resolved pursuant to the dispute
resolution process provided for in this Agreement. The invalidation, stay, or
modification of the pricing provisions of the FCC's First Report and Order in
CC Docket No. 96-98 (August 8, 1996) and the FCC's Order on Reconsideration
(September 27, 1996) shall not be considered an invalidation, stay, or
modification requiring changes to provisions of the Agreement required by the
Commission Arbitration Award, in that the FCC's pricing provisions are not the
basis for the costing and pricing provisions of the Commission's Arbitration
Award.

     31.19 NO THIRD PARTY BENEFICIARIES; DISCLAIMER OF AGENCY. This Agreement
is for the sole benefit of the Parties and their permitted assigns, and nothing
herein express or implied shall create or be construed to create any
third-party beneficiary rights hereunder.  Except for provisions herein
expressly authorizing a Party to act for another, nothing in this Agreement
shall constitute a Party as a legal representative or agent of the other Party,
nor shall a Party have the right or authority to assume, create or incur any
liability or any obligation of any kind, express or implied, against or in the
name or on behalf of the other Party unless otherwise expressly permitted by
such other Party.  Except as otherwise expressly provided in this Agreement, no
Party undertakes to perform any obligation of the other Party, whether
regulatory or contractual, or to assume any responsibility for the management
of the other Party's business.

     31.20 NO LICENSE. No license under patents, copyrights or any other
intellectual property right (other than the limited license to use consistent
with the terms, conditions and restrictions of this Agreement) is granted by
either Party or shall be implied or arise by estoppel with respect to any
transactions contemplated under this Agreement.

     31.21 SURVIVAL. The Parties' obligations under this Agreement which by
their nature are intended to continue beyond the termination or expiration of
this Agreement shall survive the termination or expiration of this Agreement.

     31.23 SCOPE OF AGREEMENT. This Agreement is intended to describe and
enable specific Interconnection and compensation arrangements between the
Parties.  This Agreement does not obligate either Party to provide arrangements
not specifically provided herein.

     31.24 ENTIRE AGREEMENT. The terms contained in this Agreement and any
Schedules, Exhibits, Appendices, tariffs and other documents or instruments
referred to herein, which are incorporated into this Agreement by this
reference, constitute the entire agreement between the Parties with respect to
the subject matter hereof, superseding all prior understandings, proposals and
other communications, oral or written.  Neither Party shall be bound by any
preprinted terms additional to or different from those in this Agreement that
may appear subsequently in the other Party's form documents, purchase orders,
quotations, acknowledgments, invoices or other


<PAGE>   46




communications.  This Agreement may only be modified by a writing signed by an
officer of each Party.


<PAGE>   47






IN WITNESS WHEREOF, the Parties hereto have caused this Agreement to be
executed as of this    21    day of   August   , 1997  .


<TABLE>
<S>            <C>                        <C>                 <C>
Digital Teleport, Inc.                    Southwestern Bell Telephone Company

Signature:/s/ J.W. Sheehy                 Signature:/s/ Larry B. Cooper
- ----------------------------------------  -------------------------------------------------

Name:          J. W. SHEEHY               Name:               Larry B. Cooper
               -------------------------                      -----------------------------
               (Print or Type)                                (Print or Type)

Title:         Vice President IC Support  Title:              General Manager - Competitive
               -------------------------                      -----------------------------
               (Print or Type)                                Provider Account Team
                                                              -----------------------------
                                                              (Print or Type)
</TABLE>



<PAGE>   48






                                  APPENDIX 800

                    ACCESS TO THE TOLL FREE CALLING DATABASE

This Appendix sets forth the terms and conditions under which SWBT provides
Access to the Toll Free Calling Database.

I. DESCRIPTION

      A.   SWBT's 800 database, an ANSI SS7 call-related database
           system, receives updates processed from the national Service
           Management System (SMS).  Customer records in the SMS are created or
           modified by entities known as Responsible Organizations (RespOrg)
           who obtain access to the SMS via the 800 Service Management System,
           Tariff F.C.C.  No.  1.  800 Service Providers must either become
           their own RespOrg or use the services of an established RespOrg.
           The services of a RespOrg includes creating and updating 800 records
           in the SMS to download in the 800 database(s).  SWBT does not,
           either through a tariff or contract, provide RespOrg service.

      B.   After the 800 customer record is created in the SMS, the SMS
           downloads the records to the appropriate databases, depending on the
           area of service chosen by the 800 subscriber.  An 800 customer
           record is created in the SMS for each 800 number to be activated.
           The SMS initiates all routing changes to update information on a
           nationwide basis.

      C.   Access to the Toll Free Calling Database allows an LSP to
           access SWBT's 800 database for the purpose of switch query and
           database response.  Access to the Toll Free Calling Database
           supports the processing of toll free calls (e.g., 800 and 888) where
           identification of the appropriate carrier (800 Service Provider) to
           transport the call is dependent upon the full ten digits of the toll
           free number (e.g., 1+800+NXX+XXXX).  Access to the Toll Free Calling
           Database includes all 800-type dialing plans (i.e., 800 and 888 [and
           877, 866, 855, 844, 833, 822, when available]).

      D.   Access to the Toll Free Calling Database provides the carrier
           identification function required to determine the appropriate
           routing of an 800 number based on the geographic origination of the
           call, from a specific or any combination of NPA/NXX, NPA or LATA.

      E.   There are three optional features available with 800 service:
           Designated 10-Digit Translation, Call Validation and Call Handling
           and Destination.

            1.   The Designated 10-Digit Translation feature
                 converts the 800 number into a designated 10-digit number.  If
                 the 800 Service Provider provides the designated 10-digit
                 number associated with the 800 number and requests delivery of
                 the designated 10-digit number



<PAGE>   49





                 in place of the 800 number, SWBT will deliver the designated
                 10-digit number.

            2.   The Call Validation feature limits calls to an 800 number to
                 calls originating only from an 800 Subscriber's customized
                 service area.  Calls originating outside the area will be
                 screened and an out of band recording will be returned to the
                 calling party.

            3.   The Call Handling and Destination feature allows routing of 800
                 calls based on one or any combination of the following: time of
                 day, day of week, percent allocation and specific 10 digit ANI.

II. TERMS AND CONDITIONS

      A.   Access to the Toll Free Calling Database provided under these
           terms and conditions is only available for use in the provision of
           telephone exchange and exchange access telecommunications services
           as specified in the Telecommunications Act of 1996 and any effective
           rules and regulations of the Federal Communications Commission and
           the state Public Service Commission.

      B.   Access to the Toll Free Calling Database is offered separate
           and apart from other unbundled network elements necessary for
           operation of the network routing function addressed in these terms
           and conditions, e.g., end office 800 SSP functionality and CCS/SS7
           signaling.  This appendix is separate from the prices, terms,
           conditions and billing for such related elements, and in no way
           shall this appendix be construed to circumvent the prices, terms,
           conditions or billing as specified for such related elements.

      C.   LSP shall address its queries to SWBT's database to the alias
           point code of the STP pair identified by SWBT.  LSP's queries shall
           use subsystem number 0 in the calling party address field and a
           translations type of 254 with a routing indicator set to route on
           global title.  LSP acknowledges that such subsystem number and
           translation type values are necessary for SWBT to properly process
           queries to its 800 database.

      D.   Each Party warrants to the other that it shall send queries
           and SS7 messages conforming to the ANSI approved standards for SS7
           protocol and pursuant to the Specifications and Standards documents
           attached and incorporated herein in Exhibit I.  Both Parties
           acknowledge that transmission in said protocol is necessary for each
           Party to provision Access to the Toll Free Calling Database (or the
           equivalent thereof).  Each Party reserves the right to modify its
           network pursuant to other specifications and standards, which may
           include Bellcore Specifications defining specific service
           applications, message types and formats, that may become necessary
           to meet the prevailing demands within the U.S.  telecommunications
           industry.  All such changes shall be announced in



<PAGE>   50





           accordance with the then prevailing industry standard procedures.
           Each party shall work cooperatively to coordinate any necessary
           changes.

      E.   LSP acknowledges and agrees that CCS/SS7 network overload due to
           extraordinary volumes of queries and/or other SS7 network messages
           can and will have a detrimental effect on the performance of SWBT's
           CCS/SS7 network and its 800 database.  LSP further agrees that SWBT,
           at its sole discretion, may employ certain automatic and/or manual
           overload controls within SWBT's CCS/SS7 network to guard against
           these detrimental effects.  SWBT shall report to the LSP any
           instances where overload controls are invoked due to the LSP's
           CCS/SS7 network.  LSP shall take immediate, corrective actions as are
           necessary to cure the conditions causing the overload situation.

      F.   During periods of 800 database system congestion, SWBT shall utilize
           an automatic code gapping procedure to control congestion that may
           affect the service of all customers of SWBT's 800 database. The
           automatic code gapping procedure used by SWBT shall tell LSP's switch
           the gap (how long LSP's switch should wait before sending another
           query) and the duration (how long the switch should continue to
           perform gapping).  For example, during an overload condition, the
           automatic code gapping procedure shall tell SWBT's 800 database when
           to begin to drop one out of three queries received.  This code
           gapping procedure shall be applied uniformly to all users of SWBT's
           800 database.  SWBT reserves the right to manually invoke the
           automatic code gapping procedure to control congestion.

      G.   Prior to SWBT initiating service under this Appendix, LSP shall
           provide an initial forecast of busy hour query volumes.  LSP shall
           update its busy hour forecast for each upcoming calendar year
           (January - December) by October 1 of the preceding year.  LSP shall
           provide such updates each year for the first three (3) years of this
           Appendix.  If, prior to the establishment of a mutually agreeable
           service effective date, in writing, SWB, at its discretion,
           determines that it lacks adequate processing capability to provide
           Access to the Toll Free Calling Database to LSP, SWBT shall notify
           LSP of SWBT's intent not to provide the services under this Appendix
           and this Appendix will be void and have no further effect.

      H.   LSP shall from time to time at SWBT's request, provide additional
           forecasted information as deemed necessary by SWBT for network
           planning in connection with this offering.

      I.   SWBT shall test the Access to the Toll Free Calling Database in
           conjunction with CCS/SS7 Interconnection Service (e.g., SS7 Appendix)
           as outlined in Bellcore Technical References TR-NWT-000533,
           TR-NWT-000954, TR-TSV-000905, and TP 76638.

<PAGE>   51





      J.   LSP shall only use Access to the Toll Free Calling Database to
           determine the routing requirements for originating 800 calls. Neither
           the LSP nor carrier customers of the LSP if the LSP is acting on
           behalf of other carriers, shall use the database information to copy,
           store, maintain or create any table or database of any kind or for
           any purpose.  If the LSP acts on behalf of other carriers to access
           SWBT's Toll Free Calling Database, LSP shall prohibit such carriers
           from copying, storing, maintaining, or creating any table or database
           of any kind from any response provided by SWBT after a query to
           SWBT's Toll Free Calling Database. LSP shall only use this network
           element in connection with the provision of telephone exchange and
           exchange access services.

      K.   LSP shall ensure that it has sufficient link capacity and related
           facilities to handle its signaling and toll free traffic without
           adversely affecting other network subscribers.

      L.   SWBT shall provide Access to the Toll Free Calling Database as set
           forth in this Appendix only as such elements are used for LSP's
           activities on behalf of its Oklahoma local service customers where
           SWBT is the incumbent local exchange carrier.  LSP agrees that any
           other use of SWBT's Toll Free Calling Database for the provision of
           800 database service by LSP will be pursuant to the terms,
           conditions, rates, and charges of SWBT's effective tariffs, as
           revised, for 800 database services.

      M.   This Appendix shall become effective on_________ and shall continue
           for one (1) year from the effective date of implementation of Access
           to the Toll Free Calling Database.  Thereafter, this Appendix shall
           remain in effect unless terminated by either party upon written
           notice given sixty (60) days in advance of the termination date.

      N.   Ordering and billing inquiries for the elements described herein
           shall be directed to the Local Service Provider Service Center
           (LSPSC).  Ordering shall be done through the LSPSC using the standard
           LSP order form and SWBT CCS7-2 Form, if applicable.

III. RATE REGULATIONS

      A.   LSP shall pay a Local Service Order Request Charge for each LSP
           request for service order activity to establish Access to the Toll
           Free Calling Database.

      B.   LSP shall pay the rates for Access to the Toll Free Calling Database,
           as described in Section III D.  These rates and charges will apply
           for one (1) year from the service effective date for each exchange.
           After one (1) year, SWBT may change the rates upon sixty (60) days'
           notice.  SWBT may first give such notice sixty days before the end of
           the first year.

<PAGE>   52





      C.   LSP shall pay a nonrecurring charge when an LSP establishes
           or changes a signaling point code.  The rates and charges for
           Signaling Point Code(s) are described in the SS7 Appendix.  This
           charge also applies to point code information provided by LSPs
           allowing other telecommunications providers to use the LSP's SS7
           signaling network.

      D.   Prices for the four rate elements associated with Access to
           the Toll Free Calling Database are as follows:

<TABLE>
        <S>  <C>                                           <C>
        1.   Toll Free Database Query Rate Element         $0.000712
        2.   Designated 10-Digit Translation Rate Element  NC
        3.   Call Validation Rate Element                  NC
        4.   Call Handling and Destination Rate Element    $0.000119
</TABLE>


      E.   LSP shall pay the Toll Free Database query rate for each
           query received and processed by SWB's database.  When applicable,
           the charge for the additional features (Designated 10-Digit
           Translation, Call Validation and Call Handling and Destination) are
           per query and in addition to the Toll Free Database query charge,
           and will also be paid by LSP.

IV. MONTHLY BILLING

      SWBT shall render monthly billing statements to the LSP, and remittance
      in full will be due within thirty (30) days of receipt.



<PAGE>   53





                                  APPENDIX 800

                                   EXHIBIT I



                          SPECIFICATIONS AND STANDARDS

<TABLE>
<CAPTION>
Description of Subject Area
- ---------------------------                     Document Number
and Issuing Organization
- ------------------------
<S>                                             <C>
Bellcore, SS7 Specifications                    TR-NWT-000246
                                                TR-NWT-000271
                                                TR-NWT-000533
Bellcore, CCS Network Interface Specifications  TR-TSV-000905
                                                TP 76638
                                                TR-NWT-000954
</TABLE>


<PAGE>   54





                            APPENDIX 911 - OKLAHOMA

                 Terms and Conditions for Providing Connection

                   to E911 Universal Emergency Number Service

This appendix between SWBT and LSP sets forth the terms and conditions upon
which SWBT will provide LSP's connection to E911 Universal Emergency Number
Service.

DEFINITIONS

The following definition is in addition to those in the Oklahoma General
Exchange Tariffs referenced below:

      Independent Exchange Company (IEC): A local exchange telephone
      company, including Local Service Providers (LSPs) who are
      certified by the state commission, other than Southwestern Bell
      Telephone Company.  An IEC may also be a customer for Universal
      Emergency Number Service in order to provide that service or
      elements of that service to legally authorized agencies within the
      IEC's serving area.

TERMS AND CONDITIONS

The following is in addition to those terms and conditions in the Oklahoma
General Exchange Tariffs referenced below:

      The Universal Emergency Number Service may be provided by
      Southwestern Bell Telephone Company or jointly by Southwestern
      Bell Telephone Company and an IEC.

      SWBT shall provide LSP with a file containing the Master Street
      Address Guide (MSAG) for the exchanges or communities specified in
      Exhibit I, in accordance with the methods and procedures described
      in the document "Operating Methods for Downloading and Maintaining
      End User Records in SWBT's DBMS".  SWBT shall provide LSP
      additional files with the entire MSAG, including subsequent
      additions or updates to the MSAG in accordance with the intervals
      specified in Exhibit I.  In addition, SWBT shall provide LSP with
      a statistical report in a timely fashion and in accordance with
      the methods and procedures described in the above mentioned
      document, for each file downloaded by LSP to SWBT's DBMS, so that
      LSP may ensure the accuracy of the end user records.  LSP will
      attest it has been provided a copy of the document referenced
      above.



<PAGE>   55





      At a reasonable time prior to the establishment of E911 Service,
      LSP shall download and maintain thereafter all information
      required to establish records necessary for furnishing connection
      to E911 Service and shall promptly notify SWBT in writing of any
      changes to be made to such records.  LSP shall adopt and comply
      with operating methods applicable to downloading and maintaining
      LSP's end user records in SWBT's DBMS, as set forth in the
      document referenced in the paragraph above.

      LSP acknowledges that its end users in a single local calling
      scope may be served by different PSAPs, and LSP shall be
      responsible for providing facilities to route calls from its end
      users to the proper E911 Control Office(s).

      LSP shall connect its switches to the E911 Control Office by
      one-way outgoing CAMA trunks dedicated for originating 911
      emergency service calls.

      The parties agree that the E911 service is provided for the use of
      the E911 Customer, and recognizes the authority of the E911
      Customer to establish service specifications and grant final
      approval (or denial) of service configurations offered by SWBT and
      the LSP.  The terms and conditions of this appendix represent a
      plan for providing E911 service, for which LSP must obtain
      documentation of approval from the appropriate E911 Customer(s)
      which have jurisdiction in the area(s) in which LSP's customers
      are located.  LSP shall provide such documentation to SWBT prior
      to the use of LSP's E911 connection for actual emergency calls.

      Both parties agree to designate a representative who shall have
      the authority to execute additional exhibits to this Appendix when
      necessary to accommodate expansion of the geographic area of LSP
      into the jurisdiction of additional PSAPs or to increase the
      number of CAMA trunks.  The designated representative for SWBT is
      Jeff Fields and for LSP is Richard Weinstein.

      The terms and conditions of this appendix are subject to
      renegotiation in the event that the E911 Customer orders changes
      to the E911 service that necessitate revision of this appendix.

RATES, TERMS AND CONDITIONS

E911 Universal Emergency Number Service will be provided utilizing the rates,
terms and conditions set forth in the following Oklahoma tariff, in addition to
those terms and conditions described previously in this Appendix:

     SWBT's General Exchange Tariff Section 36 - 911 Emergency Number Service



<PAGE>   56

                          EXHIBIT I to APPENDIX 9-1-1

        LSP SERVING AREA DESCRIPTION AND E9-1-1 INTERCONNECTION DETAILS

LSP NAME        LSP "OCN"    LSP Switch        Switch Type        LSP NPA/NXX(s)
& CONTACTS                   Name & Addr.                         included

                                               CLLI Code          #9-1-1 Trunks
                                                                  Requested
E9-1-1          LSP Telco ID
Manager
                                               "Connect Signal"   "Default" PSAP
                                                  Digits(4)
                                                    1 - 1
Database                     Estimated # of        ETST Code
Administrator                EAAs

                LSP Service Area Definition:
Switch Site Contact


          SWBT E9-1-1 SYSTEM CONFIGURATION ASSOCIATED WITH DESIGNATED
                             E9-1-1 CONTROL OFFICE

 E9-1-1 CONTROL              PSAPs INCLUDED IN     COMMUNITY        E9-1-1
        OFFICE:                                                    CUSTOMER and 
     CLLI Code:              9-1-1 SERVICE PLAN    for MSAG PULL(3) AGENCY TYPE
                                                                     (see legend
                                                                        below)

E9-1-1 Features
      Required:

     # of 9-1-1
    Trunks from
           LSP:

    MSAG Update
      Interval:   Monthly




     FOOTNOTES: (1)


                (2)


                (3)  MSAG will only include addresses within SWBT exchanges,
                     unless specifically stated otherwise.

                (4)  Refer to network interface specifications in Exhibit III.

"TYPE of AGENCY" LEGEND:
                     HRC = Home Rule City
                     ECD = Emergency Communications District
                     COG = Council of Governments or Regional Planning
                           Commission
                     GLC = General Law City
                    Cnty = County with special provisions (only applies
                           to Dallas County)
                                                                   Date Prepared

<PAGE>   57






                                  APPENDIX AIN

                           AIN CALL RELATED DATABASE

AIN is a Network Architecture that uses distributed intelligence in centralized
databases to control call processing and manage network information, rather
than performing those functions at every switch.

SWBT will provide LSP access to the SWBT's Service Creation Environment (SCE)
to design, create, test and deploy AIN-based features, equivalent to the access
it provides to itself, providing that security arrangements can be made.  LSP
requests to use the SWBT SCE will be subject to request and review procedures
to be agreed upon by the Parties.

When LSP utilizes SWBT's Local Switching network element and requests SWBT to
provision such network element with a technically feasible AIN trigger, SWBT
will provide access to the appropriate AIN Call Related Database for the
purpose of invoking either an SWBT AIN feature or a LSP developed AIN feature
as per previous section.

When LSP utilizes its own local switch, SWBT will provide access to the
appropriate AIN Call Related Database for the purpose of invoking either an
SWBT AIN feature or a LSP developed AIN feature as per previous section.

SWBT will provide access to AIN Call Related databases in a nondiscriminatory
and competitively neutral manner.  Any mediation, static or dynamic, will only
provide network reliability, protection, security and network management
functions consistent with the access service provided.  Any network management
controls found necessary to protect the AIN SCP from an overload condition will
be applied based on nondiscriminatory guidelines and procedures either (1)
resident in the SWBT STP that serves the appropriate AIN SCP or (2) via manual
controls that are initiated from SWBT Network Elements.  Such management
controls will be applied to the specific problem source, where ever that source
is, including SWBT, and not to all services unless a problem source cannot be
identified.

As requested by LSP, SWBT will provide specifications and information
reasonably necessary for LSP to utilize SWBT SCE as provided above.

SWBT SCP will partition and take reasonable steps to protect LSP service logic
and data from unauthorized access, execution or other types of compromise,
where technically feasible.



<PAGE>   58





                                  APPENDIX BCR

                       BILLING, COLLECTING AND REMITTING

This Appendix sets forth the terms and conditions that apply to those
telecommunications services for which charges are billed and collected by one
Local Exchange Carrier (LEC) or LSP but earned by another LEC; and to establish
procedures for the billing, collecting and remitting of such charges and for
compensation for the services performed in connection with the billing,
collecting and remitting of such charges.

I. DEFINITIONS

      A.   BellCore Client Company Calling Card and Third Number
           Settlement (BCC CATS) System - Nationwide system used to produce
           information reports that are used in the settlement of LEC revenues
           recorded by one BCC (or LEC) and billed to an end user of another
           BCC (or LEC) as described in accordance with the BellCore Practice
           BR 981-200-110.

      B.   Charges - the amount approved or allowed by the appropriate
           regulatory authority to be billed to an end user for any of the
           services described in Section II., rendered by a LEC to an end user.

      C.   Compensation - the amount to be paid by one Party to the
           other Party for billing, collecting and remitting of charges as set
           forth in Section IV.

      D.   IntraLATA - within a Local Access Transport Area (LATA) -
           IntraLATA messages are those messages, either intrastate or
           interstate, which originate and terminate within a LATA.  The term
           "IntraLATA messages," as used herein, shall only include those that
           qualify for the BellCore Client Company BCC CATS process.

      E.   InterLATA - between Local Access and Transport Areas (LATAs)
           as defined in the FCC's CC Docket No.  78-72.  InterLATA messages
           are those messages which originate in one LATA and terminate in a
           different LATA.  The term "InterLATA messages" as used herein, shall
           only include those that qualify for the BellCore Client Company BCC
           CATS process.

      F.   Local Exchange Carrier (LEC) - as used in this Appendix shall
           mean those Local Exchange Carriers or Local Service Providers using
           BCC CATS as a message tracking system.

      G.   Local Message - Local messages .  are those messages which
           originate and terminate within the area defined as the local service
           area of the station from which the message originates.

      H.   Revenues - the sum of all or part of the charges as defined
           above.



<PAGE>   59




II. SCOPE OF APPENDIX

      This Appendix shall apply to procedures for the billing, collecting and
      remitting of revenues (and compensation to either Party for billing,
      collecting and remitting of such revenues) derived from the following
      services:

      A.   LEC-carried (traffic transported by facilities belonging to a LEC)
           local messages of the following types:

           1.   Local Message Service Charges Billed to a Calling Card or to a
                Third Number.

           2.   Directory Assistance Calls Charged to a Calling Card or to a
                Third Number.

           3.   Public Land Mobile Radiotelephone Transient-Unit Local Message
                Service (Mobile Channel Usage Link Charge).

           4.   Maritime Mobile Radiotelephone Service and Aviation
                Radiotelephone Service (Marine, Aircraft, High Speed Train Radio
                Link Charges).

      B.   LEC-carried Interstate IntraLATA and Interstate InterLATA
           telecommunications services that qualify for and flow through the
           BCC CATS process as addressed in the BellCore Practice BR
           981-200-110, of the following types:

           1.   Interstate IntraLATA Toll Service carried by an LEC and charged
                to a Calling Card or a Third Number.

           2.   Interstate InterLATA Toll Service carried by an LEC and charged
                to a Calling Card or a Third Number.

           3.   Radio Link Charges where service is provided by one LEC and
                billed by another LEC.

III. RESPONSIBILITIES OF THE PARTIES

           A.   LSP agrees to bill, collect and remit to SWBT the charges for
                the services described in Section II. which charges are earned
                by any LEC (including SWBT), but which are to be billed to end
                users of the LSP.

           B.   In those cases in which the charges for the services listed in
                Section II. are due any LEC other than SWBT, SWBT will arrange
                to transfer these and charges to the appropriate company in
                accordance with accepted industry standards.

<PAGE>   60



           C.   Charges for the services listed in Section II. to be billed,
                collected and by LSP for SWBT's benefit, shall be remitted by
                LSP to SWBT within 30 days of the date of SWBT's bill to LSP for
                such services.

           D.   SWBT agrees to bill and collect (or to have another LEC bill and
                collect, where the appropriate), and to remit to LSP, the
                charges for the services described in Section II., which charges
                are earned by LSP, but which are to be billed by another LEC
                (including SWBT) to the end users of that LEC.

           E.   Charges for the services listed in Section II. to be billed,
                collected and remitted by SWBT or another LEC for LSP's benefit,
                shall be remitted by SWBT to LSP within 30 days of the date of
                LSP's bill to SWBT for such services.

           F.   The full amount of the charges transmitted to either Party for
                billing, collecting and remitting shall be remitted by the other
                Party, without setoff, abatement or reduction for any purpose,
                other than to deduct the compensation, as described in Section
                IV, due the Party for performing the end user billing function.
                The Party billing the end user shall be responsible for all
                uncollectible amounts related to the services described remitted
                in Section II.  Notwithstanding this paragraph, SWBT may net
                amounts due to LSP under this Appendix against amounts owed to
                SWBT when SWBT renders a bill to LSP hereunder.

           G.   Each Party will furnish to the other such information as may be
                required for monthly billing and remitting purposes.

IV. COMPENSATION

     A Party performing the services described in Section II.A. will compensate
     the other Party in the amount of $.08 for each charge billed for any
     service described in Section II.A. and subsequently remitted pursuant to
     this Appendix by such other Party to the Party performing the services
     described in Section II.A.  A Party performing the services described in
     Section II.B. will compensate the other Party in the amount of $.05 for
     each charge billed for any service described in Section II.B. and
     subsequently remitted pursuant to this Appendix by such other Party to the
     Party performing the services described in Section II.B.  Such compensation
     shall be paid (unless a Party has collected such compensation as described
     in Section III.F. above) within 30 days of the date of a bill for such
     compensation by the Party performing (or which has another LEC perform for
     it), the billing, collecting and remitting functions described in Section
     III.

V.   SWBT MAKES NO REPRESENTATIONS OR WARRANTIES, EXPRESS OR IMPLIED, INCLUDING
     BUT NOT LIMITED TO ANY WARRANTY AS TO MERCHANTABILITY OR FITNESS FOR
     INTENDED OR PARTICULAR PURPOSE WITH RESPECT TO SERVICES PROVIDED HEREUNDER.
     ADDITIONALLY, SWBT ASSUMES NO RESPONSIBILITY WITH REGARD TO THE CORRECTNESS
     OF THE DATA SUPPLIED BY LSP WHEN THIS DATA IS ACCESSED AND USED BY A THIRD
     PARTY.



<PAGE>   61




                          APPENDIX CLEARINGHOUSE (CH)

WHEREAS, SWBT operates a Clearinghouse (CH), as described below, for its own
behalf and that of participating LECs and LSPs, including LSP; and

WHEREAS, LSP wants to participate in the CH on the terms set forth herein;

The Parties agree to the following:

1.   CLEARINGHOUSE DESCRIPTION

     SWBT operates a CH for the purpose of facilitating the exchange of certain
     alternatively billed intrastate intraLATA message toll call records and the
     reporting of settlement revenues owed by and among participating LECs and
     LSPs, including SWBT and LSP.

2.   QUALIFYING MESSAGE CRITERIA


     The only toll call messages that qualify for submission to SWBT for CH
     processing are: (a) intrastate intraLATA sent collect (including calling
     card, collect and third number) messages which are originated in one LEC or
     LSP exchange, exclusively carried by a LEC or LSP over LEC or LSP
     facilities and billed to a customer located in a second LEC's or LSP
     exchange within the same state; or (b) intrastate intraLATA sent collect
     (but limited to calling card and third number) messages originated in one
     of SWBT's operating areas (located in parts of Texas, Arkansas, Kansas,
     Missouri or Oklahoma), exclusively carried by a LEC or LSP over LEC or LSP
     facilities, and billed to a customer located in a second LEC's or LSP
     exchange and not in the originating State.

3.   RESPONSIBILITIES OF THE PARTIES

A.   LSP agrees that it will provide SWBT with billing records for CH
     processing that are in an industry standard format acceptable to SWBT and
     at a minimum will display the telephone number of the end user to whom the
     call is to be billed, and data about the call sufficient for a carrier to
     comply with all applicable state regulatory requirements.  For purposes of
     this Attachment, these records ("CH Records") will detail intraLATA toll
     calls which were originated by use of the single digit access code (i.e.,
     O+ and 0-) in one LEC or LSP exchange but are to be billed to an end user
     in a second LEC's or LSP exchange.  Such records are referred to as
     category 92 records for CH processing purposes.  The term "CH Record" will
     mean the call detail attributed to a single completed toll message.

     LSP agrees that all CH Records it generates will display indicators
     denoting whether category 92 Records should be forwarded to SWBT's CH. LSP
     will retain its originating



<PAGE>   62




     records for ninety (90) days such that the category 92 Records can be
     retransmitted to SWBT for CH processing, if needed.

B.   SWBT will provide and maintain such systems as it believes are required
     to furnish the CH service described herein.  SWBT, in its capacity as
     operator of the CH, agrees to retain all CH Records processed through the
     CH for two (2) years.

C.   LSP will timely furnish to SWBT all CH Records required by SWBT to
     provide the CH service in accordance with the Technical Exhibit Settlement
     Procedures (TESP) dated DD/MM/YEAR, or as otherwise mutually agreed upon
     by the Parties.  SWBT will provide the CH service in accordance with the
     TESP, and such modifications as are subsequently agreed upon.

D.   Presently, in operating the CH, SWBT relies upon NXX codes to identify
     messages for transmission to participating billing companies.  To the
     extent any subprocesses are required to settle CH messages due to the use
     of ported numbers, such subprocessing will be the responsibility of the
     porting entity.

4. PROCESSING CHARGE

     LSP agrees to pay SWBT a processing charge in consideration of SWBT's
     performance of CH services.  This charge is $.02 per originated CH Record
     processed on behalf of LSP.

5. BILLING CHARGE

     LSP agrees to pay a $.05 per message charge to the LEC or LSP responsible
     for billing the message, including SWBT, when SWBT bills the message.

6. SETTLEMENT REPORT

     SWBT will issue monthly reports containing the results of the processing of
     CH Records to each participating LEC and LSP.  These reports list the (a)
     amounts owed by LSP for billing messages originated by others; (b) amounts
     due to LSP for LSP-originated messages billed by others; (c) applicable
     billing charges; and (d) processing charges.

7. RETROACTIVE AND LOST MESSAGES

     The Parties agree that processing of retroactive messages through the CH is
     acceptable, if such messages utilize the industry standard format for call
     records, pursuant to Section 3 of this Attachment.  The Parties agree that
     lost messages are the complete responsibility of the originating LEC or
     LSP.  If messages are lost by any Party, and cannot be recreated



<PAGE>   63



     or retransmitted, the originating LEC or LSP will estimate messages,
     minutes, and associated revenues based on the best available data.  No
     estimate will be made for messages which are more than two years old at the
     time the estimate is made.  The estimates will be off-line calculations
     (i.e., not part of the routine CH processing) and will be included as a
     supplement to the monthly settlement report.

8. LIMITATION OF LIABILITY

     By agreeing to operate the CH, SWBT assumes no liability for any LEC's or
     LSP's receipt of appropriate revenues due to it from any other entity. LSP
     agrees that SWBT will not be liable to it for damages (including, but not
     limited to, lost profits and exemplary damages) which may be owed to it as
     a result of any inaccurate or insufficient information resulting from any
     entity's actions, omissions, mistakes, or negligence and upon which SWBT
     may have relied in preparing settlement reports or performing any other act
     under this Attachment.

     LSP agrees to indemnify and hold SWBT harmless against and with respect to
     any and all third party claims, demands, liabilities or court actions
     arising from any of its actions, omissions, mistakes or negligence
     occurring during the course of SWBT's performance of CH processing pursuant
     to this Attachment.

     SWBT will not be liable for any losses or damages arising out of errors,
     interruptions, defects, failures, or malfunction of the CH services
     provided pursuant to this Attachment, including those arising from
     associated equipment and data processing systems, except such losses or
     damages caused by the sole negligence of SWBT.  Any losses or damage for
     which SWBT is held liable under this Attachment will in no event exceed the
     amount of processing charges incurred by LSP for the CH services provided
     hereunder during the period beginning at the time SWBT receives notice of
     the error, interruption, defect, failure or malfunction, to the time
     service is restored.

9. DISCLAIMER OF WARRANTIES

     SWBT MAKES NO REPRESENTATIONS OR WARRANTIES, EXPRESS OR IMPLIED, INCLUDING
     BUT NOT LIMITED TO ANY WARRANTY AS TO MERCHANTABILITY OR FITNESS FOR
     INTENDED OR PARTICULAR PURPOSE WITH RESPECT TO SERVICES PROVIDED HEREUNDER.
     ADDITIONALLY, SWBT ASSUMES NO RESPONSIBILITY WITH REGARD TO THE CORRECTNESS
     OF THE DATA SUPPLIED BY LSP WHEN THIS DATA IS ACCESSED AND USED BY A THIRD
     PARTY.

<PAGE>   64




                                 APPENDIX CNAM

This appendix contains the terms and conditions under which SWBT and LSP shall
provide CNAM Service Query service (or equivalent service):

1. Definitions

     A. A-links mean a diverse pair of facilities connecting local end office
switching centers with Signaling Transfer Points.

     B. Calling Name Delivery (CNAM) service enables the terminating end user
to identify the calling party by a displayed name before the call is answered.
The calling party's name, date and time of the call are retrieved from an SCP
database and delivered to the end user's premise between the first and second
ring for display on compatible customer premise equipment (CPE).

     C. CNAM Service Query is SWBT's service that allows LSP to query SWBT's
Calling Name database for Calling Name information in order to deliver that
information to LSP's local subscribers.

     D. Calling Name database means a Party's database containing current
Calling Name information of all working lines served or administered by that
Party, including the Calling Name information of any telecommunications company
participating in that Party's Calling Name database.

     E. Calling Name information means telecommunications companies' records of
all their subscribers' names associated with one or more assigned ten-digit
telephone numbers.

     F. Service Control Point (SCP) is a CCS network node where the Calling
Name database resides.

     G. Service Point (SP) means a CCS network interface element capable of
initiating and/or terminating SS7 messages from an end office.

     H. Service Switching Point (SSP) means the software capability within a
switching point that provides the SP with SS7 message
preparation/interpretation capability plus SS7 transmission/reception access
ability.

     I. Signaling Transfer Point (STP) is the point where a Party interconnects
with a CCS/SS7 network.  In order to connect to SWBT's SS7 network, LSP or a
third party initiating LSP's Calling Name Queries must connect with an SWBT STP
in order to connect to SWBT's SCP.



<PAGE>   65




     J. Common Channel Signaling (CCS) Network is an out-of-band,
packet-switched, signaling network used to transport supervision signals,
control signals, and data messages.  CNAM Queries and Response messages are
transported across the CCS network.

     K. Signaling System 7 (SS7) is the signaling protocol used by the CCS
network.

     L. CNAM Service Query Rate applies to each CNAM Query received at the SCP
where a Party's Calling Name database resides.

     M. Query Transport Rate applies to each CNAM Query transported through a
Party's interconnecting STP and between the STP and the Calling Name database.
SWBT and LSP shall list their STP locations in the National Exchange Carrier
Association, Inc. Tariff FCC No. 4.

     N. Query means a message in American National Standards Institute's (ANSI)
standard SS7 signaling protocol which represents a request to a Calling Name
database for Calling Name information.

     O. Response means an SS7 message which when appropriately interpreted
represents an answer to a Query.

     P. Name Record Administering Companies means telecommunications companies
that administer telephone number assignments to the public and which make their
Calling Name information available in a Party's Calling Name database.

2. Description of Service

     A. SWBT shall provide LSP Calling Name information whenever LSP initiates
a Query from an SSP for such information associated with a call terminating to
a CNAM subscriber.

     B. All Queries to SWBT's Calling Name database shall use a translation
type of 005 and a subsystem number in the calling party field mutually agreed
upon by the Parties.  LSP acknowledges that such subsystem number and
translation type values are necessary for SWBT to properly process Queries to
its Calling Name database.

     C. LSP warrants to SWBT that it shall send Queries conforming to the ANSI
approved standards for SS7 protocol and pursuant to the specification standards
documents identified in Exhibit A.  Both Parties acknowledge that transmission
in said protocol is necessary for each party to provision CNAM Service Query.
(Or the equivalent thereof).  Both Parties warrant that they shall send SS7
Messages that



<PAGE>   66




comply with ANSI approved standards for SS7 protocol and pursuant to the
specification standards documents identified in Exhibit A.  Each party reserves
the right to modify its network pursuant to other specifications standards,
which may include Bellcore specifications defining specific service
applications, message types and formats, that may become necessary to meet the
prevailing demands within the U.S.  telecommunications industry.  All such
changes shall be announced a minimum of 180 days in advance of implementation
through industry standard procedures.  Each party will work cooperatively to
coordinate any necessary changes.

     D. LSP acknowledges and agrees that CCS/SS7 network overload due to
extraordinary volumes of Queries and/or other SS7 network messages can and will
have a detrimental effect on the performance of SWBT's CCS/SS7 network.  LSP
further agrees that SWBT, in its sole discretion, shall employ certain
automatic and/or manual overload controls within its CCS/SS7 network to guard
against these detrimental effects.  SWBT shall report to LSP any instances
where overload controls are invoked due to LSP's CCS/SS7 network and LSP agrees
in such cases to take immediate corrective actions as are necessary to cure the
conditions causing the overload situation.

     E. Prior to initiating service under this Agreement, LSP shall provide to
SWBT an initial forecast of busy hour Query volumes.  If, prior to the
establishment of a mutually agreeable service effective date, in writing, SWBT,
at its discretion, determines that it lacks adequate storage or processing
capability to provide CNAM Service Query to LSP, SWBT shall notify LSP of its
intent not to provide the services under this Appendix and this Appendix will
be void and have no further effect.

     F. Upon request, LSP shall update its busy hour forecast for each upcoming
calendar year (January - December) by October 1 of the preceding year.  LSP
shall provide such updates each year for the first three (3) years of this
Agreement.

     G.   SWBT provides CNAM Service Query as set forth in this Appendix only as
such service is used for LSP's activities as a local service provider in SWBT's
traditional serving areas in the states of Arkansas, Kansas, Missouri, Oklahoma,
and Texas.  SWBT provides CNAM Service Query for interexchange carriers,
operator service providers, and other telecommunications companies under
separate contract rates.  LSP agrees that any use of SWBT's LIDB for the
provision of CNAM Service Query by LSP, including, but not limited to, when LSP
acts as an LSP outside of SWBT's traditional serving areas in the states of
Arkansas, Kansas, Missouri, Oklahoma, and Texas, and/or acts as an operator
service provider to other LSPs, local exchange companies, or any other
telecommunications company, and/or acts as an interexchange carrier, will be
pursuant to the standard terms, conditions, rates and charges of SWBT's non-LSP
contracts, as revised, for CNAM Service Query.

<PAGE>   67





3. Price and Payment

     A. LSP shall pay a CNAM Service Query Rate of $0.0115 and a Query
Transport Rate of $0.0045 for each Query initiated into SWBT's Calling Name
database.  Additional nonrecurring charges for point code activation of $14.25
and service order activity of $256.70 shall be applicable for all such activity
after the initial service order and initial point code activation.  The per
CNAM Service Query rate SWBT charges hereunder may be increased upon sixty (60)
days written notice to the LSP unless LSP acts as an agent on behalf of other
carriers in which case ninety (90) days written notice shall be given.  Upon
such notice, the Party receiving notice may terminate this Appendix without any
termination liability as provided in Section 5(B) of this Appendix.  All
tariffed rates associated with Services provided hereunder are subject to
change pursuant to revisions of such tariffs.

     B. SWBT shall record usage information for LSP's CNAM Queries terminating
to SWBT's Calling Name database.  SWBT shall use its SCPs as the source of
usage data.  SWBT shall aggregate usage by the point code of the
Query-originating SSP.

     C. Based upon the data identified in Subsection 3.B above, SWBT shall bill
the LSP for its CNAM Queries on a monthly basis.  The bill will be issued by
the fifteenth day of each month, and LSP shall pay the Subsection 3.B bill
within thirty (30) days of the bill issue date.

     D. Depending on LSP's choice of method for transporting its Queries and
responses, LSP may be required to purchase certain other services, especially
services that may be provided pursuant to effective tariffs.  In this event the
prices, terms, conditions and billing for such services will be specified in
the applicable tariff(s), and this Appendix shall not be construed to
circumvent the prices, terms, conditions, or billing as specified in the
applicable tariff(s).

     E. If there is a dispute associated with a monthly bill, the disputing
Party shall notify the other in writing within ninety (90) calendar days of the
date of said monthly bill or the dispute shall be waived.  Each party agrees
that any amount of any monthly bill that the Party disputes will be paid by
that Party according to the terms of Subsection 3.C above.  Any adjustments
relating to a disputed amount shall be reflected on the next monthly bill
issued after resolution.  Any credit issued upon resolution of any dispute
shall bear interest at the rate specified in Subsection 3.C. above, payable on
and as of the date the credit is issued.  Parties shall work cooperatively and
use their best efforts to resolve any disputes as quickly as possible.

     F. If LSP acts as a telecommunications company other than a local service
provider, or if LSP acts as a local service provider in areas outside of SWBT's
traditional service areas in the states of Arkansas, Kansas, Missouri,
Oklahoma, and



<PAGE>   68




Texas, LSP will designate those point codes from which it originates CNAM
Service Queries as an LSP acting as a local service provider within SWBT's
traditional service areas in the states of Arkansas, Kansas, Missouri, Oklahoma
and Texas from those point codes which originate CNAM Service Queries for all
other aspects of its business.  If LSP uses the same OPC to originate Queries
for its operations as an LSP within SWBT's traditional service areas in the
states of Arkansas, Kansas, Missouri, Oklahoma, and Texas as it does for any
other aspect of its business, then LSP will provide SWBT with a percentage of
use factor that SWBT can use to apportion LSP's traffic between SWBT's terms
and conditions, rates and charges under this Appendix and the standard terms,
conditions, rates and charges under SWBT's non-LSP contracts.  LSP will provide
this factor in a whole number between one (1) and one hundred (100) to indicate
the percentage of CNAM Service Queries LSP originates as an LSP acting as a
local service provider within SWBT's traditional service area in the states of
Arkansas, Kansas, Missouri, Oklahoma, and Texas.  A percentage of use factor of
1 (one) indicates that one percent of LSP's CNAM Service Queries originate as
an LSP acting as a local service provider within SWBT's traditional service
areas in the states of Arkansas, Kansas, Missouri, Oklahoma, and Texas.  A
percentage of use factor of 100 indicates that one hundred percent of LSP's
traffic is from LSP acting as a local service provider within SWBT's
traditional service areas in the states of Arkansas, Kansas, Missouri,
Oklahoma, and Texas.

     G. Such percentage of use factors will be provided by LSP on the LIDB
Access Service Order Form used to establish the service.  All updates to this
factor will be provided via a letter.  If LSP does not furnish a percentage of
usage factor, LSP agrees that SWBT will apply a percentage of use factor of one
percent (1%).

     H. LSP agrees to update its percentage of use factors on a quarterly
basis.  Effective on the first of January, April, July and October of each
year, LSP will forward to SWBT, to be received no later than fifteen (15)
business days after the first of each such month, a revised report showing the
percentage of use factors for the past three months ending the last day of
December, March, June, and September, respectively, for each OPC from which LSP
originates CNAM Service Query.  Both parties agree that the revised report will
serve as the basis for the next three months billing.  Both parties agree that
no prorating or backbilling will be done based on the report.  SWBT will use
the revised report to apportion usage rate, monthly rates, and nonrecurring
charges until a revised report is received from LSP as set forth and agreed to
herein.

     I. Both parties agree that SWBT may, upon written request by Certified
U.S.  mail (return receipt requested), require LSP to provide call detail
records which will be audited to substantiate the projected percentage of use
factor provided by LSP.  SWBT may request this detailed information annually.
If the audit results represent what SWBT considers to be a substantial
deviation from LSP's previously reported percentage of use for the period upon
which the audit is based, and that deviation is not due to seasonal changes or
other identifiable reasons, LSP agrees to allow SWBT to

<PAGE>   69




request such call detail records more than once annually.  Both parties agree
that SWBT may make the call detail records available to an independent auditor
or to SWBT audit employees within thirty (30) days of the request at an agreed
upon location during normal business hours.

     J. Both parties agree that if LSP fails to comply with SWBT's request for
auditable call detail records, SWBT may refuse additional applications for
service and/or refuse to complete any pending orders for service for a period
of thirty (30) days.  If at the conclusion of thirty (30) days, LSP still does
not comply with this request, both parties agree that SWBT may apply an assumed
percentage of use factor of one percent (1%).

4. Ownership of the Calling Name Information

     A. Telecommunications companies depositing information in a Party's
Calling Name database retain full and complete ownership and control over such
Calling Names information in that Calling Name database.  The querying Party
obtains no ownership interest by virtue of this Appendix.

     B. LSP shall not copy, store, maintain or create any table or database of
any kind after initiation of, and based upon a response to, a CNAM Query to
SWBT's calling name database.

     C. If LSP acts on behalf of other carriers, LSP shall prohibit its
Query-originating carrier customers from copying, storing, maintaining, or
creating any table or database of any kind from any Response provided by SWBT
after a CNAM Query to a Calling Name database.

5. Term and Termination

     A. This Appendix shall become effective pursuant to Section XXVII
(Effective Date) of the Agreement and shall continue for two (2) years from the
date of implementation of CNAM Service Query (or the equivalent thereof).
Thereafter, this Appendix shall remain in effect unless terminated by either
party upon written notice given sixty (60) days in advance of the termination
date.

      B. Should LSP terminate this Appendix within the first six (6) months of
this effective date, LSP agrees to pay SWBT an early termination sum equal to
two (2) times the average monthly volume of LSP's CNAM Queries times the rate
specified in Section 3(A) of this Appendix.  The average monthly volume will be
calculated using the previous two (2) months' volume divided by two (2) or, if
less than two months, the monthly volume of the first month service was
provided.



<PAGE>   70




     C. If at any time during the term of this Appendix a tariff for CNAM
Service Query (or the equivalent service thereof) becomes effective, the tariff
and all terms and conditions, including all rates, will supersede this
Appendix.  Under these circumstances, no termination liability as provided in
Section 5(B) of this Appendix will apply.

     D. If a party materially fails to perform its obligation under this
appendix, the other party, after notifying the non-performing party of the
failure to perform and allowing that party thirty (30) days after receipt of
the notice to cure such failure, may cancel this appendix immediately upon
written notice.

     E. Notwithstanding anything to the contrary in this Appendix, if legal or
regulatory decisions or rules compel SWBT or LSP to terminate the Appendix,
SWBT and LSP shall have no liability to the other in connection with such
termination.

6. Limitation of Liability

     A. LSP's sole and exclusive remedies against SWBT for injury, loss or
damage caused by or arising from anything said, omitted or done in connection
with this Appendix regardless of the form of action, whether in contract or in
tort (including negligence or strict liability) shall be the amount of actual
direct damages and in no event shall exceed the amount paid for CNAM Service
Queries.

     B. The remedies in Section 6(A) of this Appendix shall be exclusive of all
other remedies against a Party, its affiliate, subsidiaries or parent
corporation, (including their directors, officers, employees or agents).

     C. In no event shall SWBT have any liability for system outages or
inaccessibility, or for losses arising from the unauthorized use of the data by
CNAM Service Query purchasers.

     D. CALLING NAME INFORMATION PROVIDED TO AN LSP HEREUNDER SHALL BE PROVIDED
"AS IS." SWBT MAKES NO WARRANTY, EXPRESS OR IMPLIED, REGARDING THE ACCURACY OR
COMPLETENESS OF THE CALLING NAME INFORMATION REGARDLESS OF WHOSE CALLING NAME
INFORMATION IS PROVIDED.  AND, SWBT SHALL NOT BE HELD LIABLE FOR ANY ACTIONS OR
OMISSIONS ARISING OUT OF OR IN CONJUNCTION WITH LSP'S USE OF THE CALLING NAME
INFORMATION.  NOTWITHSTANDING THE FOREGOING, SWBT WARRANTS THAT LSP WILL BE
ACCESSING THE SAME CALLING NAME DATABASE FOR CUSTOMER'S CNAM QUERIES AS SWBT
ACCESSES FOR ITS OWN QUERIES.

     E. SWBT is furnishing access to its Calling Name database in order to
facilitate the LSP's provision of Calling Name Delivery Service (CNDS) to its
end users 


<PAGE>   71




or to the end users of its Query-originating carrier customers, but not to
insure against the risk of completion of a call to a CNDS subscriber without the
display of the name of the caller.  While each Party agrees to make every
reasonable attempt to provide accurate and current Calling Name information, the
Parties acknowledge that Calling Name information is the product of routine
business service order activity.  LSP acknowledges that SWBT can furnish Calling
Name information only as accurate and current as the information has been
provided to SWBT for inclusion in its CNAM database.  Therefore, SWBT, in
addition to the limitations of liability set forth, is not liable for
inaccuracies in the Calling Name information name records provided to LSP or to
its Query-originating carrier customers, except such inaccuracies caused by
SWBT's willful or wanton misconduct or gross negligence.

     The Parties acknowledge that each Calling Name database limits the Calling
Name information length to fifteen (15) characters.  As a result, the Calling
Name Information provided in a response to a Query may not reflect a
subscriber's full name.  Name records of residential local telephone subscribers
will generally be stored in the form of last name followed by first name
(separated by a comma or space) to a maximum of fifteen (15) characters. Name
records of business local telephone subscribers will generally be stored in the
form of the first fifteen (15) characters of the listed business name that in
some cases may include abbreviations.  The Parties also acknowledge that certain
local telephone service subscribers of Name Record Administering Companies may
require their name information to be restricted, altered, or rendered
unavailable.  Therefore, in addition to the limitations of liability set forth
in Section 6 of this Appendix, SWBT is not liable for any and all liability,
claims, damages or actions including attorney's fees, resulting directly or
indirectly from the content of any Name Record contained in a Calling Name
database and provided to LSP or its Query-originating carrier customers, except
for such content related claims, damages or actions resulting from SWBT's
willful or wanton misconduct or gross negligence.

     F. The Parties acknowledge that certain federal and/or state regulations
require that local exchange telephone companies make available to their
subscribers the ability to block the delivery of their telephone number and/or
name information to the terminating telephone when the subscriber originates a
telephone call.  This blocking can either be on a call-by-call basis or on an
every call basis.  Similarly, a party utilizing blocking services can unblock on
a call-by-call basis or every call basis.  LSP acknowledges its responsibility
to and warrant that it will abide by information received in SS7 protocol during
call set-up that the calling telephone service subscriber wishes to block or
unblock the delivery of telephone number and/or name information to a CNDS
subscriber.  LSP agrees not to attempt to obtain the caller's name information
by originating a Query to SWBT's Calling Name database where the subscriber
attempted to block such information, nor will LSP block information a subscriber
attempted to unblock.  Therefore, SWBT, in addition to the limitations of
liability set forth in this Section, is not liable for any failure by LSP or its
Query-originating carrier customers to



<PAGE>   72




abide by the caller's desire to block or unblock delivery of Calling Name
information, and LSP agrees to hold SWBT harmless from, and defend and
indemnify SWBT for, any and all liability, claims, damages or actions including
attorney's fees, resulting directly or indirectly from LSP or its
Query-originating carrier customers' failure to block or unblock delivery of
the Calling Name information when appropriate indication is provided, except
for such privacy related claims, damages or actions caused by SWBT's willful or
wanton misconduct or gross negligence.

     G. In no event shall SWBT, its affiliates, subsidiaries or parent
corporation (including its directors, officers, employees or agents) have any
liability whatsoever to or through LSP for any indirect, special, or
consequential damages, including, but not limited to loss of anticipated
profits or revenue or other economic loss in connection with or arising from
anything said, omitted or done hereunder, even if SWBT has been advised of the
possibility of such damages.

7. Communication and Notices

     A. Ordering and billing inquiries for the services described herein from
SWBT shall be directed to the Local Service Provider Service Center (LSPSC).
Ordering shall be done through the LSPSC using the form attached hereto as
Exhibit B.

8. Confidentiality

     A. Identification.  SWBT and LSP recognize and acknowledge that, in
connection with the services to be provided hereunder, it may disclose to the
other party proprietary or confidential customer, technical or business
information in written, graphic, oral or other tangible or intangible forms.
In order for such information to be considered "Proprietary Information" under
this Appendix, it must be marked "Confidential" or "Proprietary" or bear a
marking of similar import.  Orally discussed information shall be considered
Proprietary Information only if contemporaneously identified as such and
reduced to writing and delivered to the other party with a statement or marking
of confidentiality within twenty (20) calendar days after oral disclosure.

     B. Nondisclosure.  Subject to Sections 8C through 8F, the Party (the
"Receiving Party") that receives Proprietary Information from the other Party
(the "Disclosing Party") agrees:

     (1) That all Proprietary Information shall be and shall remain the
exclusive property of the Disclosing Party.

     (2)  To limit access to such Proprietary Information to authorized
employees and other individuals who have a need to know the Proprietary
Information in order to perform its obligation under this Appendix.



<PAGE>   73





     (3) To keep such Proprietary Information confidential and to use the same
level of care to prevent disclosure or unauthorized use of the received
Proprietary Information as it exercises in protecting its own Proprietary
Information of a similar nature.

     (4) For a period of three (3) years following any disclosure, not to copy
or publish or disclose such Proprietary Information to others or authorize
anyone else to copy or publish or disclose such Proprietary Information to
others without the prior written approval of the Disclosing Party.

     (5) To use such Proprietary Information only for purposes of performing
its obligations under this Appendix and for other purposes only upon such terms
as may be agreed upon between the Parties in writing.

     C. Required Disclosures.  The Receiving Party agrees to give notice to the
Disclosing Party of any demand to disclose or provide Proprietary Information
of the Disclosing Party to another person, under lawful process, prior to
disclosing or furnishing such Proprietary Information.  Further, the Receiving
Party agrees to reasonably cooperate if the Disclosing Party deems it necessary
to seek protective arrangements.  The Receiving Party may disclose or provide
Proprietary Information of the Disclosing Party to meet the requirements of a
court, regulatory body or government agency having jurisdiction over the Party;
provided, however, that the Receiving Party shall notify the Disclosing Party
so as to give the Disclosing Party a reasonable opportunity to object to such
disclosure.  The Disclosing Party may not unreasonably withhold approval of
protective arrangements provided by any such court, regulatory body or
government agency.  Nothing herein requires either Party to support the
position of any person or entity as to whether any particular Proprietary
Information is proprietary under applicable law or this Section 8.

     D. Exceptions.  Notwithstanding anything to the contrary contained in this
Appendix, the Proprietary Information described herein shall not be deemed
confidential or proprietary and the Receiving Party shall have no obligation to
prevent disclosure of such Proprietary Information if such Proprietary
Information:

     (1) is already known to the Receiving Party;

     (2) is or becomes publicly known, through publication, inspection of the
product, or otherwise, and through no wrongful act of the Receiving Party;

     (3) is received from a third party without similar restriction and without
breach of this Section 8;

     (4) is independently developed, produced or generated by the Receiving
Party;

     (5)  is furnished to a third party by the Disclosing Party without a
similar restriction on the third party's rights; or



<PAGE>   74




     (6) is approved for release by written authorization of the Disclosing
Party, but only to the extent of such authorization.

     E. Permitted Uses.  SWBT shall be permitted to use Proprietary Information
obtained through recording the volume of Customer Queries for the purposes of:
(a) estimation of facilities usage for jurisdictional separations; (b)
engineering and network planning of facilities; and (c) measurement for billing
purposes.

     F. Legal Requirements.  Notwithstanding anything to the contrary contained
in this Agreement, a Party's ability to disclose Proprietary Information or use
disclosed Proprietary Information is subject to all applicable statutes,
decisions and regulatory rules concerning the disclosure and use of such
Proprietary Information which, by their express terms, mandate a different
handling of such information.

9. Mutuality

To the extent that LSP stores its own Calling Name information in a database,
LSP agrees that such Calling Name information shall be available to SWBT on
terms and conditions comparable to those contained in this Appendix.  Such
terms and conditions shall include but not be limited to, making such Calling
Name information available on a platform technically similar to that employed
by SWBT, and at a rate comparable to that charged by SWBT.

10. Attached and incorporated herein are:

Exhibit A - Specifications and Standards
Exhibit B - LIDB Access Service Order Form [to be attached].





<PAGE>   75





                                                                       EXHIBIT A

                                                                     Page 1 of 1

                          Specifications and Standards



<TABLE>
<CAPTION>
Descriptions of Subject Area
and Issuing Organization                        Document Number
- ------------------------                        ---------------
<S>                                             <C>
A.  Bellcore, SS7 Specifications                TR-NPL-000246

B.  ANSI, SS7 Specifications
      - Message Transfer part                   T1.111
      - Signaling Connection Control            T1.112
             Part
      - Transaction Capabilities                T1.114
              Application Part                   

C.  Bellcore, CLASS Calling Name Delivery       TR-NWT-001188
        Generic Requirements

D.  Bellcore, CCS Network Interface             TR-TSV-000905
        Specifications         
</TABLE>


<PAGE>   76
                                                                      Exhibit B
Southwestern Bell Telephone Company
Customer Provided Factor Reports
_______________________________________________________________________________

                   LIDB ACCESS VALIDATION SERVICES ORDER FORM
                   ------------------------------------------


CUSTOMER NAME  _________________________________________________________________


CARRIER CUSTOMER NAME ABBREVIATION _____________________________________________
(CCNA - THREE ALPHA CHARACTERS)

CUSTOMER ADDRESS _______________________________________________________________


________________________________________________________________________________


CUSTOMER BILLING NAME __________________________________________________________
(IF DIFFERENT THAN CUSTOMER NAME)

ACCESS CUSTOMER NAME ABBREVIATION ______________________________________________
(ACNA - THREE ALPHA CHARACTERS)

CUSTOMER BILLING ADDRESS _______________________________________________________
(IF DIFFERENT THAN CUSTOMER ADDRESS)

CITY, STATE, ZIP CODE __________________________________________________________


CUSTOMER BILLING CONTACT NAME AND TELEPHONE NUMBER _____________________________


___________________________________________________(____)_______________________


CREDIT INFORMATION: TYPE OF OWNERSHIP _____________________________
                    (S - SOLE OWNER;  C - INCORP.;  P - PARTNERSHIP)


IF INCORPORATED: STATE WHERE INCORP._______________ DATE INCORP. _______________


CHARTER NUMBER _________________________________________________________________


PRES. NAME ____________________________________ OFC. TEL. NO. (____)____________


V.P. NAME _____________________________________ OFC. TEL. NO. (____)____________


SECT. NAME ____________________________________ OFC. TEL. NO. (____)____________


TREA. NAME ____________________________________ OFC. TEL. NO. (____)____________

IF PARTNERSHIP:
PARTNERS NAME _________________________________ OFC. TEL. NO. (____)____________


PARTNERS NAME _________________________________ OFC. TEL. NO. (____)____________


PARTNERS NAME _________________________________ OFC. TEL. NO. (____)____________


PARTNERS NAME _________________________________ OFC. TEL. NO. (____)____________


LETTER OF AGENCY DATED_________________________ SIGNATURE ______________________
 
<PAGE>   77


Southwestern Bell Telephone Company
Customer Provided Factor Reports
_______________________________________________________________________________

SWBT ORDER NUMBER_________________
                 

DESIRED DUE DATE__________________ FIRM DUE DATE_________________________ 
               

FOR NEW SERVICE, THE APPROXIMATE NUMBER OF NPA NXXs______________________
                                                   

TYPE OF ACTIVITY______(N-NEW OR ADD; C-CHANGE; D-DISCONNECT; S-SUPP)
                

BILLING ACCOUNT NUMBER (BAN)_____________________________________________
                            

CUSTOMER ORDER CONTACT NAME, ADDRESS, ZIP CODE, AND TELEPHONE NUMBER:
_________________________________

_________________________________

          (     )
_________________________________              


CUSTOMER TECHNICAL CONTACT NAME AND TELEPHONE NUMBER:
                                              (     )
_________________________________________________________________________



CPOC SVC. REP. CONTACT NAME AND TELEPHONE NUMBER:
                                              (     )
_________________________________________________________________________



*SWBT CKR:_______________________    *TWO SIX CODE:______________________
 
   (SWBT ID OF CCS/SS7 INTERCONN. SVC.)


1._________________________________
  

2._________________________________
  

3._________________________________
  

4._________________________________
  

* THIS INFORMATION SHOULD BE OBTAINED BY THE LIDB CUSTOMER FROM THEIR CCS/SS7
  INTERCONNECTION SERVICE PROVIDER.
<PAGE>   78


Southwestern Bell Telephone Company
Customer Provided Factor Reports
_______________________________________________________________________________

LIDB VALIDATION SERVICE ____ CALLING NAME SERVICE ____

ORIGINATING LINE NUMBER SCREENING ____

<TABLE>
<CAPTION>
ACT.      ORIGINATING POINT             ACT.      ORIGINATING POINT
TYPE      CODES:                        TYPE      CODES:
<S>       <C>                           <C>       <C>

____      _________________             ____      _________________
____      _________________             ____      _________________
____      _________________             ____      _________________
____      _________________             ____      _________________
____      _________________             ____      _________________
____      _________________             ____      _________________
____      _________________             ____      _________________
____      _________________             ____      _________________
____      _________________             ____      _________________
____      _________________             ____      _________________
____      _________________             ____      _________________
____      _________________             ____      _________________
____      _________________             ____      _________________
____      _________________             ____      _________________
____      _________________             ____      _________________
____      _________________             ____      _________________
____      _________________             ____      _________________
____      _________________             ____      _________________
____      _________________             ____      _________________
____      _________________             ____      _________________
____      _________________             ____      _________________
____      _________________             ____      _________________
____      _________________             ____      _________________
____      _________________             ____      _________________
____      _________________             ____      _________________
____      _________________             ____      _________________
____      _________________             ____      _________________
____      _________________             ____      _________________
____      _________________             ____      _________________
____      _________________             ____      _________________
____      _________________             ____      _________________
____      _________________             ____      _________________
____      _________________             ____      _________________
____      _________________             ____      _________________
____      _________________             ____      _________________
</TABLE>

REMARKS _______________________________________________________________________
_______________________________________________________________________________
_______________________________________________________________________________

DATE AND TIME RECEIVED IN THE CPOC
<PAGE>   79
Southwestern Bell Telephone Company
Customer Provided Factor Reports
_______________________________________________________________________________

LIDB VALIDATION SERVICE ____ CALLING NAME SERVICE ____

ORIGINATING LINE NUMBER SCREENING ____

<TABLE>
<CAPTION>
ACT.      ORIGINATING POINT             ACT.      ORIGINATING POINT
TYPE      CODES:                        TYPE      CODES:
<S>       <C>                           <C>       <C>

____      _________________             ____      _________________
____      _________________             ____      _________________
____      _________________             ____      _________________
____      _________________             ____      _________________
____      _________________             ____      _________________
____      _________________             ____      _________________
____      _________________             ____      _________________
____      _________________             ____      _________________
____      _________________             ____      _________________
____      _________________             ____      _________________
____      _________________             ____      _________________
____      _________________             ____      _________________
____      _________________             ____      _________________
____      _________________             ____      _________________
____      _________________             ____      _________________
____      _________________             ____      _________________
____      _________________             ____      _________________
____      _________________             ____      _________________
____      _________________             ____      _________________
____      _________________             ____      _________________
____      _________________             ____      _________________
____      _________________             ____      _________________
____      _________________             ____      _________________
____      _________________             ____      _________________
____      _________________             ____      _________________
____      _________________             ____      _________________
____      _________________             ____      _________________
____      _________________             ____      _________________
____      _________________             ____      _________________
____      _________________             ____      _________________
____      _________________             ____      _________________
____      _________________             ____      _________________
____      _________________             ____      _________________
____      _________________             ____      _________________
____      _________________             ____      _________________
</TABLE>

REMARKS _______________________________________________________________________
_______________________________________________________________________________
_______________________________________________________________________________

DATE AND TIME RECEIVED IN THE CPOC







<PAGE>   80
 

Southwestern Bell Telephone Company
Customer Provided Factor Reports
_______________________________________________________________________________

                   LIDB ACCESS VALIDATION SERVICE ORDER FORM

                                  INSTRUCTIONS

THE LIDB ACCESS VALIDATION SERVICE ORDER FORM CONSISTS OF FOUR PAGES.

PAGE 1 - ALL THE INFORMATION ON THIS PAGE IS FOR ADMINISTRATIVE USE IN
         ESTABLISHING THE LIDB BILLING ACCOUNT.  ALL OF THE INFORMATION IS
         REQUIRED ON THE INITIAL ORDER.  ORDERS SUBMITTED SUBSEQUENT TO THE
         ESTABLISHED ACCOUNT WILL REQUIRE ONLY THE CUSTOMER'S NAME AND ADDRESS.
         THE OTHER ENTRIES WILL BE REQUIRED ONLY IF THERE IS A CHANGE TO THE
         ORIGINAL INFORMATION.

PAGE 2 - ALL THE INFORMATION ON PAGE TWO IS FOR THE REQUESTED ACTIVITY.  THIS
         INFORMATION WILL ALWAYS BE REQUIRED.

1.   DESIRED DUE DATE/FIRM DUE DATE - APPROXIMATE NUMBER OF NPA NXXs

      ***DESIRED DUE DATE IS USED WHEN A FIRM DUE DATE HAS NOT BEEN COORDINATED
      WITH THE LIDB CUSTOMER PRIOR TO THE SUBMISSION OF THE ORDER FORM TO THE
      ICSC.

      THE LIDB CUSTOMER WILL ENTER THEIR DESIRED DATE FOR THEIR LIDB SERVICE TO
      BE ESTABLISHED AND THE APPROXIMATE NUMBER OF NPA NXXs ASSOCIATED WITH THE
      NEW SERVICE.

      IF THE ORDER IS FOR SUBSEQUENT ACTIVITY TO AN ESTABLISHED ACCOUNT, THE
      APPROXIMATE NUMBER OF NPA NXXs WILL NOT BE REQUIRED.

      ***FIRM DUE DATE IS USED WHEN THE CUSTOMER'S ACCOUNT MANAGER HAS
      COORDINATED WITH THE SNAC TO ESTABLISH THE DUE DATE PRIOR TO THE ORDER
      FORM BEING SENT TO THE CPOC.



<PAGE>   81


Southwestern Bell Telephone Company
Customer Provided Factor Reports
_______________________________________________________________________________

PAGE 2 INSTRUCTIONS CONTINUED -

2. TYPE OF ACTIVITY

      N    - SHOULD BE ENTERED TO ESTABLISH A LIDB SERVICE CAN ALSO BE
           ENTERED TO ADD ADDITIONAL POINT CODES TO AN EXISTING SERVICE

      C    - SHOULD BE ENTERED TO ADD POINT CODES TO OR DELETE POINT
           CODES FROM AN EXISTING SERVICE

      D    - SHOULD BE ENTERED TO COMPLETELY DISCONNECT AN EXISTING
           SERVICE

      S    - SHOULD BE ENTERED TO MAKE A CHANGE ON A CURRENT ORDER PRIOR
           TO THE COMPLETION DATE (i.e., CHANGE DUE DATE, CORRECT POINT
           CODE(S), ETC.)

3. BILLING ACCOUNT NUMBER (BAN)

      THE SWBT BILLING ACCOUNT NUMBER OF THE VALIDATION SERVICE AND/OR THE
      CALLING NAME SERVICE

      IF THE ORDER IS FOR NEW SERVICE, THIS FIELD WILL BE BLANK

4. CUSTOMER ORDER CONTACT...

      A CONTACT WITH THE CUSTOMER THAT THE CPOC CAN COORDINATE WITH FOR THE
      DESIRED DUE DATE OR CORRECTIONS TO AN ORDER.

5. CUSTOMER TECHNICAL CONTACT...

      A TECHNICAL CONTACT WITH THE CUSTOMER THAT THE SWBT SNAC CAN COORDINATE
      WITH FOR THE PROVISIONING OF THE SERVICE.

6. CPOC SERVICE REP....

      THE SWBT CPOC SERVICE REPRESENTATIVE THAT NEGOTIATES THE ORDER WILL ENTER
      THEIR NAME AND CONTACT INFORMATION.

7. SWBT CKR AND TWO SIX CODE

      THIS INFORMATION WILL BE OBTAINED BY THE LIDB CUSTOMER FROM THEIR ORDER
      TO ESTABLISH THEIR CCS/SS7 INTERCONNECTION SERVICE OR FROM THEIR CCS/SS7
      INTERCONNECTION SERVICE PROVIDER.  THERE WILL ALWAYS BE FOUR LINKS FOR
      ACCESS TO THE LIDB.



<PAGE>   82


Southwestern Bell Telephone Company
Customer Provided Factor Reports
_______________________________________________________________________________

INSTRUCTIONS FOR PAGES 3 & 4

LIDB HAS THREE QUERY SERVICES: VALIDATION, CALLING NAME (CNAM), AND ORIGINATING
LINE NUMBER SCREENING (OLNS)

THERE IS NOT A SPECIFIC NUMBER OF POINT CODES REQUIRED FOR ANY LIDB SERVICE.
THE LIDB CUSTOMER CAN SUBMIT AS MANY COPIES OF PAGES 3 & 4 AS REQUIRED FOR
THEIR POINT CODES PER REQUEST.

THE VALIDATION, CNAM, AND OLNS WILL BE ESTABLISHED ON A SINGLE BILLING ACCOUNT.
IF THE LIDB CUSTOMER WOULD LIKE SEPARATE BILLING ACCOUNTS, THEN SEPARATE BANs
MUST BE REQUESTED (i.e.  "ESTABLISH SEPARATE BILLING ACCOUNTS") IN THE BILLING
ACCOUNT NUMBER FIELD ON PAGE 2.  IF AN EXISTING LIDB CUSTOMER WANTS TO
ESTABLISH THEIR LIDB CNAM ON A SEPARATE BILLING ACCOUNT, THEN THE LIDB CUSTOMER
SHOULD ENTER "NEW BAN (OR SEPARATE BAN) FOR THE LIDB CNAM SERVICE" IN THE
BILLING ACCOUNT NUMBER FIELD ON PAGE 2.  THE SAME WILL APPLY FOR A SEPARATE BAN
FOR OLNS.  IN ORDER TO SET UP SEPARATE BILLING ACCOUNTS, THE POINT CODES FOR
THE LIDB VALIDATION, CNAM, AND OLNS SERVICES CANNOT BE THE SAME.  THE CUSTOMER
WILL USE BOTH PAGES 3 & 4 TO SUBMIT THEIR POINT CODES SEPARATELY FOR SEPARATE
BILLING ACCOUNTS.

1.   LIDB VALIDATION SERVICE ___ CALLING NAME SERVICE ___ ORIGINATING LINE
     NUMBER SCREENING ___

      ENTER A CHECK MARK OR AN "X" TO INDICATE WHICH OF THE LIDB SERVICES THE
      ORDER FORM IS REQUESTING TO ESTABLISH OR DELETE.  IF ALL LIDB SERVICES
      ARE REQUESTED ON THE SAME ORDER, THE POINT CODES FOR EACH SERVICE MUST BE
      LISTED ON SEPARATE PAGES.  THIS WILL ENABLE SWBT TO APPLY THE CORRECT
      NONRECURRING CHARGES.

2. ACTIVITY TYPES

      IF A LIDB CUSTOMER NEEDS TO CHANGE AN EXISTING OPC ON AN ESTABLISHED
      ACCOUNT, THE "D" SHOULD BE USED TO INDICATE THE OPC CHANGING FROM AND THE
      "N" SHOULD BE USED TO INDICATE THE OPC CHANGING TO.



<PAGE>   83


Southwestern Bell Telephone Company
Customer Provided Factor Reports
_______________________________________________________________________________


PAGES 3 & 4 INSTRUCTIONS CONTINUED -

LIST OF ORIGINATING POINT CODES AND ACTIVITY TYPE
- -------------------------------------------------
ACTIVITY TYPES: N-ESTABLISHING OR ADDING NEW POINT CODE(S)
                D-DELETE EXISTING POINT CODE(S)


PLEASE NOTE IN THE FOLLOWING EXAMPLES, THE ORDER FORM ACTIVITY IS THE ENTRY
FROM PAGE 2, NUMBER 3. THIS IS NOT THE ACTIVITY TYPE.


EXAMPLE 1-ORDER FORM ACTIVITY IS "N" TO ESTABLISH A NEW ACCOUNT AND SERVICE

<TABLE>     <CAPTION>
<S>         <C>                       <C>         <C>
ACT.        ORIGINATING POINT         ACT.        ORIGINATING POINT
TYPE        CODES:                    TYPE        CODES:

N           XXX-XXX-XXX               N           XXX-XXX-XXX
- -           -----------               -           -----------


EXAMPLE 2-ORDER FORM ACTIVITY IS "C" TO CHANGE AN EXISTING POINT CODE OR TO
ADD A NEW POINT CODE AND DELETE AN EXISTING POINT CODE''

ACT.        ORIGINATING POINT         ACT.        ORIGINATING POINT
TYPE        CODES:                    TYPE        CODES:

N           XXX-XXX-XXX               D           XXX-XXX-XXX
- -           -----------               -           -----------



EXAMPLE 3-ORDER FORM ACTIVITY IS "D" TO DISCONNECT THE ACCOUNT AND THE SERVICE

ACT.        ORIGINATING POINT         ACT.        ORIGINATING POINT
TYPE        CODES:                    TYPE        CODES:

D           XXX-XXX-XXX               D           XXX-XXX-XXX
- -           -----------               -           -----------
</TABLE>


THE REMARKS SECTION MAY BE UTILIZED BY SWBT OR THE LIDB CUSTOMER.

THE DATE AND TIME RECEIVED WILL BE ENTERED BY THE SWBT CPOC UPON RECEIPT OF THE
FORM.

AFTER THE FORM HAS BEEN COMPLETED, IT SHOULD BE MAILED OR FAXED TO THE SWBT
ICSC IN ST. LOUIS, MISSOURI.




<PAGE>   84




                                  APPENDIX DCO

EXCHANGE:

<TABLE>
<CAPTION>
                                                 NIP(4)             
                                           [Insert address and   Interconnection
Direction(1)  LSP Location(2)    DCO(3)        V&H below]            Method
- ------------  ---------------    ------    -------------------   ---------------
<S>           <C>                <C>       <C>                   <C>
</TABLE>

(1) This column will be completed by indicating the direction of the terminating
traffic (e.g., either LSP to SWBT or SWBT to LSP.)

(2) LSP LOCATION - The address of the LSP Location that will house LSP's
interconnection equipment and through which SWBT will terminate traffic on the
LSP's network.

(3) DESIGNATED CONNECTING OFFICE (DCO) - The address of the SWBT end office or
tandem through which the LSP will terminate traffic on SWBT's network.

(4) NETWORK INTERCONNECTION POINT OR "NIP" - The NIP is the location where SWBT
and LSP facilities connect. The NIP will be identified by address and V&H
Coordinates. The NIP for traffic going from LSP to SWBT and going from SWBT to
LSP could be different. Where the physical interface occurs at a SWBT end
office or tandem, the NIP shall be located at the DCO. When SWBT and an LSP
agree to interconnect with a Mid-Span Fiber Interconnection (MSFI) the NIP is
the location where the fiber of SWBT and the fiber of the LSP is connected,
unless both Parties agree that the NIP is defined otherwise. Where the physical
interface occurs at the LSP location the NIP for that interconnection shall be
located at the LSP location.

<PAGE>   85





                                  APPENDIX DA


                          DIRECTORY ASSISTANCE SERVICE

     This Appendix sets forth the terms and conditions under which Southwestern
Bell Telephone Company ("SWBT") agrees to provide Directory Assistance Services
(DA Services) for LSP ("LSP").

     I. SERVICES

           SWBT will provide the following DA Services:

      A.   DIRECTORY ASSISTANCE (DA) - consists of providing subscriber
           listing information (name, address, and published telephone number
           or an indication of "non-published status") to LSP's end users who
           dial 411 or NPA+555+1212 and whenever appropriate, performing
           Non-Published and Non-List service according to current SWBT methods
           and practices.

      B.   DIRECTORY ASSISTANCE CALL COMPLETION (DACC) - an optional
           service in which SWBT completes a call to the requested number on
           behalf of LSP's end user, utilizing an automated voice system or
           with operator assistance.  SWBT agrees to provide DA with DACC upon
           request.

     II. DEFINITIONS

           The following terms are defined as set forth below:

      A.   Non-List Telephone Number - A telephone number that, at the
           request of the telephone subscriber, is not published in a telephone
           directory, but is available by calling a SWBT DA operator.

      B.   Non-Published Number - A telephone number that, at the
           request of the telephone subscriber, is neither published in a
           telephone directory nor provided by a SWBT DA operator.

      C.   Published Number - A telephone number that is published in a
           telephone directory and is available upon request by calling a SWBT
           DA operator.

      D.   Call Branding - the procedure of identifying a providers name
           audibly and distinctly to the consumer at the beginning of each DA
           Services call, and prior to completion of a DACC request.



<PAGE>   86





     III. CALL BRANDING AND RATE REFERENCE REQUIREMENTS

      A.   REQUIREMENTS - Where SWBT provides LSPs OS and DA services
           via the same trunk, both the OS and DA calls will be branded with
           the same brand.  Where SWBT is only providing DA service on behalf
           of the LSP, specific DA branding can be provided upon request.  Such
           branding will be provided pursuant paragraph B. below.

      B.   CALL BRANDING - SWBT will brand DA in LSP's name based upon
           the criteria outlined below:

            1.   LSP will provide SWBT with written specification
                 of its company name to be used in creating LSP specific
                 branding messages for its DA calls.

            2.   An initial non-recurring charge applies per TOPS
                 switch, per load for the establishment of Call Branding as
                 well as a charge per TOPS switch, per subsequent load to
                 change the brand.  In addition, a per call charge applies for
                 every DA call handled by SWBT on behalf of LSP when such
                 services are provided in conjunction with:  i) the purchase of
                 SWBT's unbundled local switching; or ii) when multiple brands
                 are required on a single Operator Services trunk.  Prices for
                 Call Branding are as outlined in Exhibit II, attached hereto
                 and incorporated herein.

      C.   DIRECTORY ASSISTANCE (DA) RATE/REFERENCE INFORMATION - SWBT
           will provide LSP DA Rate/Reference Information based upon the
           criteria outlined below:

            1.   LSP will furnish DA Rate and Reference
                 Information in a mutually agreed to format or media thirty
                 (30) days in advance of the date when the DA Services are to
                 be undertaken.

            2.   LSP will inform SWBT, in writing, of any changes
                 to be made to such Rate/Reference Information ten (10) working
                 days prior to the effective Rate/Reference change date.  LSP
                 acknowledges that it is responsible to provide SWBT updated
                 Rate/Reference Information in advance of when the
                 Rates/Reference Information are to become effective.

            3.   In all cases when a SWBT Operator receives a rate
                 request from a LSP end user, SWBT will quote the applicable DA
                 rates as provided by LSP.

     An initial non-recurring charge will apply per TOPS switch for loading of
LSP's Operator Services Rate/Reference Information as well as a charge per TOPS
switch for each subsequent change to either the LSP's DA Services Rate or
Reference Information.



<PAGE>   87





     IV. RESPONSIBILITIES OF THE PARTIES

      A.   SWBT will be the sole provider of DA Services LSP's local
           serving area(s) listed in Exhibit I, which is attached to this
           Appendix, beginning on the service effective date also shown in
           Exhibit I.

      B.   LSP will be responsible for providing the equipment and
           facilities necessary for signaling and routing calls with Automatic
           Number Identification (ANI) to each SWBT operator switch.  Should
           LSP seek to provide interexchange DA Service under this agreement it
           is responsible for ordering the necessary facilities.  Nothing in
           this agreement in any way changes the manner in which an
           interexchange Carrier obtains access service for the purpose of
           originating or terminating interexchange traffic.

      C.   Facilities necessary for the provision of DA Services shall
           be provided by the parties hereto, using standard trunk traffic
           engineering procedures to insure that the objective grade of service
           is met.  Each party shall bear the costs for its own facilities.
           LSP shall bear the costs of facilities necessary for signaling and
           routing calls with Automatic Number Identification (ANI) to each
           SWBT operator switch.  SWBT shall bear the cost of facilities and
           equipment necessary to provide DA Services.

      D.   LSP will furnish in writing to SWBT, thirty (30) days in
           advance of the date when the DA Services are to be undertaken, all
           end user listing records and information required by SWBT to provide
           the DA Services.

      E.   LSP will keep end user listing records current using
           reporting forms and procedures that are mutually acceptable to both
           parties, and will inform SWBT, in writing, of any changes to be made
           to such records.  LSP will send the DA listing records to SWBT via a
           local manual service order, T-TRAN, magnetic tape or by any other
           mutually agreed to format or media.

      F.   SWBT will accumulate and provide LSP such data as necessary
           for LSP to verify traffic volumes and bill its end users.

     V. METHODS AND PRACTICES

           SWBT will provide the DA Services to LSP's end users in accordance
      with SWBT's DA methods and practices that are in effect at the time the
      DA call is made, unless otherwise agreed in writing by both parties.

     VI. PRICING

           Pricing for DA Services shall be based on the rates specified in
      Exhibit II, PRICING, which is attached hereto and made part of this
      Appendix.  The prices will apply from the



<PAGE>   88





      service effective date through the term of this agreement as specified in
      paragraph X., A. below.  Beyond the specified term of this Appendix, SWBT
      may change the prices for the provision of DA Services upon one
      hundred-twenty (120) days' notice to LSP.

     VII. MONTHLY BILLING

           SWBT will render monthly billing statements to LSP, and remittance
      in full will be due within thirty (30) days of receipt.

     VIII. LIABILITY

      A.   In addition to the liability provisions contained in the
           Agreement, LSP agrees to defend, indemnify, and hold harmless SWBT
           from any and all losses, damages, or other liability including
           attorneys fees that LSP may incur as a result of claims, demands,
           wrongful death actions, or other suits brought by any party that
           arise out of LSP's end users use of DA Services.  LSP shall defend
           against all end user claims just as if LSP had provided such service
           to its end user with the LSP's own operators and shall assert its
           tariff limitation of liability for benefit of both SWBT and LSP.

      B.   LSP also agrees to release, defend, indemnify, and hold
           harmless SWBT from any claim, demand or suit that asserts any
           infringement or invasion of privacy or confidentiality of any person
           or persons caused or claimed to be caused, directly, or indirectly,
           by SWBT employees and equipment associated with provision of the DA
           Services.  This provision includes but is not limited to suits
           arising from disclosure of the telephone number, address, or name
           associated with the telephone called or the telephone used to call
           the DA Services.

     IX. TERMS OF APPENDIX

      A.   Unless sooner terminated, this Appendix will continue in
           force for a period of one (1) year from the effective date of this
           agreement and thereafter until terminated by one hundred-twenty
           (120) days notice in writing from either Party to the other.

      B.   If LSP terminates this agreement prior to the agreed-upon
           term of this Appendix, LSP shall pay SWBT, within thirty (30) days
           of the issuance of a final bill by SWBT, all amounts due for actual
           services provided under this Appendix, plus estimated monthly
           charges for the remainder of the term.  Estimated charges will be
           based on an average of the actual monthly amounts billed by SWBT
           pursuant to this Appendix prior to its termination.

      C.   The rates applicable for determining the amount(s) under the
           terms outlined in this Section are those specified in Exhibit II.



<PAGE>   89





                            APPENDIX DA - EXHIBIT 1

                  DIRECTORY ASSISTANCE SERVICES EXCHANGE LIST

                              EFFECTIVE:  _____________________
                                                 (mm/dd/yr)

     The following table depicts the services and exchanges covered by this
Appendix:

<TABLE>
<S>              <C>              <C>               <C>                <C>
SWBT SERVING       LSP'S
OFFICE(S)        OFFICE(S)        TOLL (555)        LOCAL (411)        DACC
</TABLE>


<PAGE>   90





                                  APPENDIX DA

                                    OKLAHOMA

                                   EXHIBIT II

                           PRICING - FACILITIES BASED

                              EFFECTIVE:  ______________________
                                               (mm/dd/yr)      

     The following rates will apply for each service element:

<TABLE>
<S>                                          <C>
A. DIRECTORY ASSISTANCE (DA)
This usage rate applies to each DA call.
                              Rate per call     $0.425
B. DIRECTORY ASSISTANCE CALL COMPLETION
DACC
This usage rate applies to each DA call
that has been completed to the requested
number.
                    Rate per completed call      $0.24
C. CALL BRANDING
An initial non-recurring charge applies
per TOPS switch, per brand for the
establishment of Call Branding.
                      Rate per initial load  $2,700.00
             Rate per load for Brand change  $2,700.00
                                 Per Call (1)    $0.02
D. DA SERVICES RATE/REFERENCE INFORMATION
An initial non-recurring charge applies
per TOPS switch for the initial load of
Carrier's DA Services Rate/Reference
Information.  An additional non-recurring
charge applies for each subsequent change
to Rate/Reference Information.
                      Rate per initial load  $4,100.00
            Rate per subsequent rate change  $2,900.00
       Rate per subsequent reference change  $2,900.00
</TABLE>


(1) A per call charge will apply when DA services are provided in conjunction
with i) unbundled local switching or ii) when multiple brands are required on a
single trunk.
<PAGE>   91





                                  APPENDIX FGA

     This Appendix to Attachment Compensation sets forth the terms and
conditions under which the Parties will distribute revenue from the joint
provision of Feature Group A (FGA) Switched Access Services.

     These services will be provided within a Local Access and Transport Area
(LATA) and/or an Extended Area Service (EAS) arrangement.  The Primary Company
will compensate the Secondary Company only to the extent that it has not
already been compensated under its interstate or intrastate access service
tariffs or other settlement/contract arrangements.  This Appendix is subject to
applicable tariffs.

1.0  DEFINITIONS

1.1  Local Access and Transport Area (LATA) means a pre-established geographic
     area encompassing one or more local exchange areas within which a Party
     may provide telecommunications services.

1.2  The term Extended Area Service (EAS) as used in this Appendix means the
     provision of message telephone exchange service between two or more local
     exchange service areas without a toll charge.

1.3  Subscriber Access Lines will mean a communication facility provided under
     a general and/or exchange service tariff extended from a customer premise
     to a central office switch which may be used to make and receive exchange
     service calls, intrastate toll service or interstate toll service calls.

1.4  Feature Group A Switched Access Service includes all facilities and
     services rendered in furnishing FGA access service, both in EAS and
     non-EAS (i.e., LATA wide terminations) areas, in accordance with the
     schedule or charges, regulations, terms and conditions stated in the
     interstate or intrastate access service tariffs of the Parties.

1.5  The Primary Company denotes the Party with the Primary office(s).

1.6  The Primary Office is an office which:  (1) directly or jointly connects
     to an interexchange carrier and/or end user: and (2) provides joint FGA
     switched access service to that interexchange carrier and/or end user with
     other end offices.

1.7  The Secondary Company denotes the Party with the secondary office(s).

1.8  The Secondary Office is any office involved in providing joint FGA
     switched access to an Interexchange carrier and/or end user through the
     switching facilities of the Primary office.



<PAGE>   92





1.9  Revenues under this Appendix are those FGA Switched Access amounts due
     the Primary and Secondary Companies under their applicable tariffs, less
     uncollectible revenues.  Revenues for any other services are not included.
     Uncollectible revenues are those revenues the Primary Company is unable
     to collect, using its regular established collection procedures.  The
     Primary Company may offset uncollectibles against current revenue
     distribution.

1.10 Access Minutes or Minutes of Use (MOUs) are those minutes of use as
     described in Part 69 of the Federal Communications Commission s Rules, and
     are limited to those FGA MOUs which originate and/or terminate in the
     Secondary Office(s) covered by this Appendix.

1.11 Currently Effective Tariff Rate means the approved tariff rate effective
     on the first day of the month for which compensation is being calculated.

2.0  UNDERTAKING OF THE PARTIES

2.1  The Secondary Company will notify the Primary Company of all tariff rate
     revisions, affecting this Appendix which the FCC or other appropriate
     regulatory authority allows to take effect, at least 30 days in advance of
     their effective date.  Revenue distribution will be based on the revised
     rates 45 days after the effective date of the tariff revisions.  However,
     if the secondary Company fails to notify the Primary Company of a new rate
     within 30 days of its effective date, the Primary company may delay
     implementation of the new rate until the next month s revenue distribution
     cycle, and will not be required to adjust the previous bills retroactive.

2.2  Each party will furnish to the other such information as may reasonably
     be required for the administration, computation and distribution of
     revenue, or otherwise to execute the provisions of this appendix.

3.0  ADMINISTRATION OF REVENUE DISTRIBUTION

     The Primary Company will be responsible for the administration, computation
     and distribution of the FGA access service revenues collected on behalf of
     the Secondary Company.

4.0  MINUTES OF USE (MOUS) DEVELOPMENT

4.1  The Parties will calculate the amount of FGA revenues due each Party, by
     determining the amount of FGA MOUs attributable to each Party as described
     below.  The Primary Company will then multiply the MOUs by the rates in
     the



<PAGE>   93





     Secondary Company's applicable tariff to determine the amounts tentatively
     due to the Secondary Company.

4.2  TERMINATING MOUS DEVELOPMENT

4.2.1 Actual monthly premium (charged at equal access end office) and
      non-premium (charged at non-equal access end offices) terminating FGA
      access MOUs for each office in the LATA or a FGA access EAS area will be
      measured by the Primary Company.

4.2.2 Where the Primary Company cannot measure or identify the terminating FGA
      MOUs by end office, terminating MOUs will be total unmeasured MOUs
      allocated to the LATA.  In this event, those MOUs will be distributed
      based upon the ratio of each Party's subscriber access lines, as
      identified in Exhibit B, which is attached hereto and made a part hereof,
      to the total subscriber access lines in the FGA access area as determined
      by the Primary Company.

4.3  ORIGINATING MOUS DEVELOPMENT

4.3.1 The Primary Company will derive and distribute monthly originating FGA
      access MOUs, billed by the Primary Company, to each Secondary Company s
      end office in the EAS calling area, as identified in Exhibit A, which is
      attached hereto and made a part hereof, based upon a ration of each Party
      s subscriber access lines to the total subscriber access lines in the
      appropriate EAS area as determined by the Primary Company.

4.3.2 The parties recognize that since originating non-EAS calls to the FGA
      service area are rated and billed as intraLATA toll, such usage is assumed
      to be minimal.  Therefore, originating FGA access MOUs will not be
      distributed to end offices outside an EAS calling area.

5.0  CALCULATION OF REVENUE DISTRIBUTION

5.1  The amount of premium or non-premium revenues due each party each month
     will be equal to the sum of Originating and Terminating premium or
     non-premium revenue for each end office.  These revenues will be
     calculated by the Primary Company by multiplying each of the Secondary
     Company s effective interstate and/or intrastate FGA switched access
     tariff rate elements (except the Local Transport element described below)
     by the appropriate MOU calculation under Sections 4.2.1 and 4.2.2.

5.2  Local Transport (or its equivalent under the Secondary Company s tariff
     and called Transport in this agreement) compensation will be determined
     for each company by multiplying each of the Secondary Company s Transport
     rates by the appropriate MOUs (as calculated under Sections 4.2.1 and
     4.2.2) by the



<PAGE>   94





      Secondary Company's percentage ownership of facilities agreed on by the
      Parties and set out in Exhibit B, which is attached hereto and made a part
      hereof.

6.0  REVENUE DISTRIBUTION AMOUNTS, MONTHLY STATEMENTS AND PAYMENTS

6.1  The Primary Company each month will calculate and prepare a monthly
     compensation statement reflecting the revenue distribution amounts for
     FGA, both EAS and non-EAS, access service due the Secondary Company.

6.2  The monthly compensation statement will show, for each Secondary Office,
     separately:

6.2.1  The total number of non-premium or premium terminating MOUs and 
       revenue.

6.2.2  The total number on non-premium or premium originating MOUs and 
       revenues.

6.2.3  The total compensation due the Secondary Company, by rate element.

6.2.4  The number of terminating MOUs recorded by the Primary Company.

6.2.5  The number of originating MOUs estimated by the Primary Company pursuant
       to Section 4.3 contained herein.

6.2.6  The number of access lines used to prorate originating usage pursuant to
       Section 4.3 contained herein.

6.2.7  The percent ownership factor, if any, used to prorate Local Transport
       revenues.

6.2.8  Adjustments for uncollectibles.

6.3  Within 60 Calendar days after the end of each billing period, the Primary
     Company will remit the compensation amount due the Secondary Company.
     Where more than one compensation amount is due, they may be combined into
     a single payment.

7.0  MISCELLANEOUS PROVISIONS

7.1  This appendix will remain in effect until terminated by thirty (30)
     calendar days notice by either Party to the other.



<PAGE>   95





                                   EXHIBIT A


                 EAS Locations for Originating and Terminating


                         Feature Group A Access Service

<TABLE>
<S>                   <C>        <C>
   Primary Office      Secondary Office
      Company               Company
CLLI CODE NPA-NXX
ACCESS LINE           CLLI CODE  NPA-NXX
</TABLE>


<PAGE>   96





                                   EXHIBIT B


                       Location for LATA Wide Termination


                      of Feature Group A Access Service in


                             Non-EAS Calling Areas


                            SECONDARY OFFICE COMPANY

<TABLE>
<S>        <C>      <C>          <C>                   <C>
CLLI CODE  NPA-NXX  Access Line  % Ownership of        LATA
                                 Transport
                                 Facilities
</TABLE>


<PAGE>   97





                                 APPENDIX HOST

     This Appendix sets forth the terms and conditions under which SWBT will
perform hosting responsibilities for LSP for (1) the provision of billable
message data and/or access usage data received from such LSP for distribution
to the appropriate billing and/or processing location via SWBT's in-region
network or via the nationwide Centralized Message Distribution System (CMDS) or
(2) billable message data and/or access usage data received from other Local
Exchange Carriers (LECs) or LSPs or from CMDS to be distributed to such LSP.
This Appendix covers hosting in region (i.e., Missouri, Arkansas, Kansas,
Oklahoma and Texas) and hosting out of region.  Hosting out of region is only
available to an LSP that is a Full Status Revenue Accounting Office (RAO)
company.

     I. DEFINITIONS

      A.   Access Usage Record (AUR) - a message record which contains
           the usage measurement reflecting the service feature group, duration
           and time of day for a message which is subsequently used by a LEC to
           bill access to an Interexchange Carrier (IXC).

      B.   Bellcore Client Company Calling Card and Third Number
           Settlement (BCC CATS) System - nationwide system used to produce
           information reports that are used in the settlement of LEC or LSP
           revenues recorded by one BCC (or LEC or LSP within the territory of
           that BCC) and billed to a customer of another BCC (or LEC or LSP
           within the territory of that BCC) as described in accordance with
           the Bellcore Practice BR 981-200-110.

      C.   Billable Message Record - a message record containing details
           of a completed call which has been carried by a LEC over its
           facilities or by LSP over its facilities and such record is to be
           used to bill an end user.

      D.   Centralized Message Distribution System (CMDS) - the national
           network of private line facilities used to exchange Exchange Message
           Record (EMR) formatted billing data between a company originating a
           message and the company billing for a message.

      E.   Exchange Message Record (EMR) - industry standard message
           format as described in accordance with the Bellcore Practice BR
           010-200-010 which was developed to facilitate the exchange of
           telecommunications message information.

      F.   Full Status Revenue Accounting Office (RAO) - an LSP or LEC
           that is responsible for formatting EMR records, and for editing and
           packing of such detail records into files for distribution.



<PAGE>   98





      G.   In-Region Hosting - includes the transport, using Hosting
           Company network, of (1) billable message record data for LEC or LSP
           transported messages and/or access usage record data that originate
           in a region and are delivered by the LSP to SWBT at a mutually
           agreed upon location within the territory of SWBT to be sent to
           another LEC or LSP for billing; and (2) billable message record data
           and/or access usage data received from CMDS or another LEC or LSP to
           be delivered to the LSP for billing to its end user located within
           the five state territory of SWBT.

      H.   Out-of-Region Hosting - includes the transport, using the
           national CMDS network, of (1) billable message record data for LEC
           or LSP transported messages and/or access usage record data that
           originate out of region and are delivered by the LSP to SWBT and are
           to be sent to another LEC or LSP for billing; and (2) billable
           message record data and/or access usage data received from CMDS or
           another LEC or LSP to be delivered to the LSP for billing to its end
           user located outside SWBT's five state territory.

      I.   Non-Full Status Revenue Accounting Office (RAO) - An LSP or
           LEC that has assigned responsibility to SWBT for editing, sorting
           and placing billing message record detail and/or access usage record
           detail into packs for distribution.

     II. RESPONSIBILITIES OF THE PARTIES

      A.   All data forwarded from LSP must be in the industry standard
           EMR format in accordance with Bellcore Practice BR 010-200-010.  The
           LSP is responsible to ensure all appropriate settlement plan
           indicators are included in the message detail, i.e., the Bellcore
           Client Company Calling Card and Third Number Settlement (BCC CATS)
           System.  The LSP acknowledges that the only message records subject
           to this Hosting Appendix are those that arise from LEC or LSP
           transported billable messages and/or access usage records to be used
           by a LEC or LSP for the purpose of billing access to an IXC.

      B.   When LSP delivers billable message data and/or access usage
           data to SWBT which must be forwarded to another location for billing
           purposes, SWBT will accept data from the LSP, perform edits to make
           message detail and access usage records consistent with CMDS
           specifications, and use its in region data network to forward this
           data to the appropriate billing company or to access the national
           CMDS network in order to deliver this data to the appropriate
           billing and/or processing company.

           If LSP is not a Full Status RAO Company, SWBT will also sort billable
           message detail and access usage record detail by Revenue Accounting
           Office, Operating Company Number or Service Bureau and split data
           into packs for invoicing prior to using its in region network to
           forward this data to the appropriate billing company or to access the
           national CMDS network in order to deliver such data to the
           appropriate billing company.



<PAGE>   99





      C.   For billable message data and/or access usage data received
           by SWBT for delivery to an LSP location, SWBT will use its in region
           data network to receive this data from other LECs or LSPs or from
           CMDS in order to deliver such billable message data and/or access
           usage data to the agreed upon billing LSP location.

III. BASIS OF COMPENSATION

           LSP agrees to pay SWBT a per record charge for billable message
      records and/or access usage records that are received from LSP and
      destined for delivery to another location for billing, at the rates
      listed below:

<TABLE>
                    <S>                               <C>
                    Per Record Charge
                        Full Status RAO Company
                             Hosting Company Network  $.002
                             National CMDS Network    $.005
                        Non-Full Status RAO Company
                             Hosting Company Network  $.007
                             National CMDS Network    $.010
</TABLE>


           As part of this per record charge, SWBT will provide Confirmation
      and/or Error Reports and any Intercompany Settlement (ICS) Reports, such
      as the Bellcore Client Company Calling Card and Third Number Settlement
      System (BCC CATS), as needed.

           LSP agrees to pay SWBT a per record charge for billable message
      records and/or access usage records which are entered on a magnetic tape
      or data file for delivery to the LSP, at the rate listed below:

<TABLE>
                       <S>  <C>                    <C>
                                Per Record Charge  $.003
</TABLE>


IV.  LIABILITY


      A.   Any failure to populate accurate information in accordance
           with Section II.A. will be the responsibility of the LSP.

      B.   SWBT will not be liable for any costs incurred by the LSP
           when the LSP is transmitting data files via data lines and a
           transmission failure results in the non-receipt of data by SWBT.

      C.   SWBT SHALL NOT BE LIABLE IN ANY EVENT FOR ANY SPECIAL,
           INDIRECT, INCIDENTAL, CONSEQUENTIAL, OR EXEMPLARY DAMAGES RESULTING
           FROM, OR ARISING OUT OF, OR IN CONNECTION WITH, THIS APPENDIX.

      D.   SWBT shall not be liable for any losses or damages arising
           out of errors, interruptions, defects, failures, or malfunction of
           the services provided hereunder,



<PAGE>   100





           including any and all associated equipment and data processing
           systems, except such losses or damages caused by the sole negligence
           of SWBT.  Any losses or damage for which SWBT is held liable under
           this Appendix shall in no event exceed the amount of charges made for
           the services provided hereunder during the period beginning at the
           time SWBT receives notice of the error, interruption, defect, failure
           or malfunction to the time service is restored.

      E.   The LSP agrees to release, defend, indemnify, and hold
           harmless SWBT from any and all losses, damages, or other liability,
           including attorney fees, that it may incur as a result of claims,
           demands, or other suits brought by any party that arise out of the
           use of this service by the LSP, its customers or end users.  The LSP
           shall defend SWBT against all end user claims just as if LSP had
           provided such service to its end users with its own employees.

      F.   The LSP also agrees to release, defend, indemnify and hold
           harmless SWBT from any claim, demand or suit that asserts any
           infringement or invasion of privacy or confidentiality of any
           person(s), caused or claimed to be caused, directly or indirectly,
           by SWBT employees and equipment associated with provision of this
           service.  This includes, but is not limited to suits arising from
           disclosure of any customer specific information associated with
           either the originating or terminating numbers used to provision this
           service.

     VI. DISCLAIMER OF WARRANTIES

           SWBT MAKES NO REPRESENTATIONS OR WARRANTIES, EXPRESS OR IMPLIED,
      INCLUDING BUT NOT LIMITED TO ANY WARRANTY AS TO MERCHANTABILITY OR
      FITNESS FOR INTENDED OR PARTICULAR PURPOSE WITH RESPECT TO SERVICES
      PROVIDED HEREUNDER.  ADDITIONALLY, SWBT ASSUMES NO RESPONSIBILITY WITH
      REGARD TO THE CORRECTNESS OF THE DATA SUPPLIED BY LSP WHEN THIS DATA IS
      ACCESSED AND USED BY A THIRD PARTY.



<PAGE>   101





                                  APPENDIX ITR

                            (TRUNKING REQUIREMENTS)

     This Appendix provides descriptions of the trunking requirements for the
LSP and SWBT interconnection.  The attached scenarios depict the recommended
trunk groups for local, intraLATA toll, interLATA "meet point", mass calling,
E911 and Operator Services interconnection.  All references to incoming and
outgoing trunk groups are from the perspective of the LSP.

     I. LOCAL TRAFFIC AND INTRALATA TOLL TRAFFIC

           (a) The LSP Originating (The LSP to SWBT)

                 When SWBT has a combined local and access tandem in an
            exchange, IntraLATA Toll Traffic may be combined with the Local
            Traffic on the same trunk group.  When SWBT has more than one
            combined local and access tandem in an exchange, the LSP shall
            provide a separate trunk group to each SWBT tandem.  When there are
            separate SWBT access and local tandems in an exchange, a separate
            local trunk group shall be provided to the local tandem and a
            separate IntraLATA toll trunk group shall be provided to the access
            tandem.  This trunk group(s) shall be one-way or two-way
            directionalized outgoing only and will utilize Signaling System 7
            (SS7) or multifrequency (MF) protocol signaling.

           (b) The LSP Terminating (SWBT to LSP)

                 When SWBT has a combined local and access tandem, SWBT shall
            normally combine the Local and IntraLATA Toll Traffic over a single
            trunk group to the LSP.  When SWBT has a separate access and local
            tandem in an exchange, a trunk group shall be established from each
            tandem to the LSP.  This trunk group(s) shall be one-way or two-way
            directionalized incoming only and will utilize SS7 or MF protocol
            signaling.

           (c) Direct End Office Trunking

                 The Parties shall establish direct end office primary high
            usage trunk groups for Local Traffic and/or IntraLATA Toll Traffic
            when end office traffic requires twelve or more trunks.  If LSP has
            established collocation to the end office, the trunks shall be
            provisioned over the LSP collocation facility.  If the LSP has no
            collocation facilities, SWBT shall provision the trunks from the
            NIP to the end office.  IntraLATA Toll Traffic shall be provided
            over a separate trunk group to the SWBT access tandem.



<PAGE>   102





     II. ACCESS TOLL CONNECTING TRUNKS

           InterLATA traffic shall be transported between the LSP Central
      Office and the SWBT access tandem over a "meet point" trunk group
      separate from local and intraLATA toll traffic.  The access toll
      connecting trunk group will be established for the transmission and
      routing of Exchange Access traffic between the LSP's end users and
      interexchange carriers via a SWBT access tandem.  When SWBT has more than
      one access tandem within an exchange, the LSP shall utilize a single
      access toll connecting trunk group to one SWBT tandem within the
      exchange.  This trunk group may be set up as one-way or two-way (two-way
      is preferred) and will utilize SS7 or MF protocol signaling.  The traffic
      use code and modifier for this trunk group should be MDJ (see Scenario 1,
      2, 3, or 4).

     III. 800 (888) TRAFFIC

           If the LSP chooses SWBT to handle 800 (888) database queries from
      its central office switches, all the LSP originating 800 (888) service
      queries will be routed over the InterLATA Interexchange Carrier (MDJ)
      trunk group.  This traffic will include a combination of both InterLATA
      Interexchange Carrier 800 (888) service and IntraLATA LEC 800 (888)
      service that will be identified and segregated by carrier through the
      database query handled through the SWBT tandem switch.

           A separate trunk group from each Party to the other will be required
      for IntraLATA 800 service if either Party chooses to handle the 800
      database queries from its switch location.  The purpose of the separate
      trunk group is to provide for the segregation of originating 800
      IntraLATA call volumes to ensure the proper billing of intercompany
      settlement compensation.

           The trunk group shall be set up as one-way outgoing only and will
      utilize SS7 protocol signaling.  The traffic use code and modifier for
      this trunk group should be DD800J (see Scenario 1, 2, 3, or 4).

     IV. E911

           A segregated trunk group will be required to each appropriate E911
      tandem within the exchange in which the LSP offers the Exchange Service.
      This trunk group shall be set up as a one-way outgoing only and shall
      utilize MF CAMA signaling.  The traffic use code and modifier for this
      trunk group shall be ESJ (see Scenario 1, 2, 3, or 4).

     V. MASS CALLING (PUBLIC RESPONSE CHOKE NETWORK)

           A segregated trunk group shall be required to the designated Public
      Response Choke Network tandem in each serving area.  This trunk group
      shall be one-way outgoing only and shall utilize MF signaling.  It is
      recommended that this group be sized as follows:



<PAGE>   103






<TABLE>
                    <S>                       <C>
                    <15001 access lines (AC)  2 trunks (min)
                    15001 to 25000 AC         3 trunks
                    25001 to 50000 AC         4 trunks
                    50001 to 75000 AC         5 trunks
                    >75000 AC                 6 trunks (max)
</TABLE>


           The traffic use code and modifier for this trunk group shall be
      TOCRJ (see Scenario 1, 2, 3, or 4).

     VI. OPERATOR SERVICES

      (a)  No Operator Contract:

                 Inward Operator Assistance (Toll Center (TC) Code plus 121) -
            The LSP may choose from two interconnection options for Inward
            Operator Assistance as follows:

                 Option 1 - Interexchange Carrier (IXC) Carrier

                 The LSP may utilize the Interexchange Carrier Network (see
            Scenario 6).  The LSP operator will route its calls requiring
            inward operator assistance through its designated IXC POP to SWBT's
            TOPS tandem.  SWBT shall route its calls requiring inward operator
            assistance to the LSP's Designated Operator Switch (TTC) through
            the designated IXC POP.

                 Option 2 - The LSP Operator Switch

                 The LSP reports its switch as the designated serving operator
            switch (TTC) for its NPA-NXXs and requests SWBT to route its calls
            requiring inward operator assistance to the LSP.  This option
            requires a segregated two-way (with MF signaling) trunk group from
            SWBT's Access Tandem to the LSP switch.  The traffic use code and
            modifier for this trunk group should be OAJ (see Scenario 7).  The
            LSP's operator will route its calls requiring inward operator
            assistance to SWBT's operator over an IXC network.

      (b)  Operator Contract with SWBT:

            (i)  Directory Assistance (DA):

                       The LSP may contract for DA services only.  A segregated
                  trunk group for these services would be required to SWBT's
                  TOPS tandem.  This trunk group is set up as one-way outgoing
                  only and utilizes MF and Operator Services signaling.  The
                  traffic use code and modifier for this trunk group should be
                  DAJ (see Scenario 5).



<PAGE>   104





            (ii) Directory Assistance Call Completion (DACC):

                       The LSP contracting for DA services may also contract
                  for DACC.  This requires a segregated one-way trunk group to
                  SWBT's TOPS tandem.  This trunk group is set up as one-way
                  outgoing only and utilizes MF signaling.  The traffic use
                  code and modifier for this trunk group should be DACCJ (see
                  Scenario 5).

            (iii) Busy Line Verification:

                       When SWBT's operator is under contract to verify the
                  LSP's end user loop, SWBT will utilize a segregated one-way
                  with MF signaling trunk group from SWBT's Access Tandem to
                  the LSP switch.  The traffic use code and modifier for this
                  trunk group should be VRJ (see Scenario 5)

            (iv) Operator Assistance (0+, 0-):

                       This service requires a one-way trunk group from the LSP
                  switch to SWBT's TOPS tandem.  Two types of trunk groups may
                  be utilized.  If the trunk group transports DA/DACC, the
                  trunk group will be designated as ETCMFJ (0-, 0+, DA, DACC)
                  (see Scenario 5).  If DA is not required or is transported on
                  a segregated trunk group, then the group will be designated
                  as ETCM2J (see Scenario 5).  MF and Operator Services
                  signaling will be required on the trunk group.

     VII. Trunk Design Blocking Criteria

           Trunk forecasting and servicing for the Local and IntraLATA Toll
      trunk groups shall be based on the industry standard objective of 2%
      overall time consistent average busy season busy hour loads (1% from the
      End Office to the Tandem and 1% from the Tandem to the End Office based
      on Neil Wilkinson B.01M [Medium Day-to-Day Variation] until traffic data
      is available).  Listed below are the trunk group types and their
      objectives:

<TABLE>
   <S>    <C>                             <C>
          Trunk Group Type                Blocking Objective (Neil Wilkinson M)
          ----------------                -------------------------------------   
          Local Tandem                                             1%
          Local Direct                                             2%
          IntraLATA Interexchange                                  1%
          911                                                      1%
          Operator Services (DA/DACC)                              1%
          Operator Services (0+, 0-)                               0.5%
          InterLATA Tandem                                         0.5%
</TABLE>



<PAGE>   105




VIII.  FORECASTING/SERVICING RESPONSIBILITIES

           Both Parties agree to provide an initial forecast for establishing
      the initial interconnection facilities.  Subsequent forecasts will be
      provided on a semi-annual basis concurrent with the publication of the
      SWBT General Trunk Forecast including yearly forecasted trunk quantities
      for all trunk groups described in this Appendix for a minimum of three
      years and the use of Common Language Location Identifier (CLLI-MSG) which
      is described in Bellcore documents BR795-100-100 and BR795-400-100.
      Trunk servicing will be performed on a monthly basis at a minimum.

           SWBT shall be responsible for forecasting and servicing the trunk
      groups terminating to the LSP.  The LSP shall be responsible for
      forecasting and servicing the trunk groups terminating to SWBT end users
      and/or to be used for tandem transit to other provider's networks,
      operator services and DA service, and InterLATA toll service.  Standard
      trunk traffic engineering methods will be used as described in Bell
      Communications Research, Inc. (Bellcore) document SR-TAP-000191, Trunk
      Traffic Engineering Concepts and Applications.

IX. TRUNK SERVICING

      1.   Orders between the Parties to establish, add, change or
           disconnect trunks shall be processed by use of an Access Service
           Request ("ASR").

      2.   All Parties shall jointly manage the capacity of local
           Interconnection Trunk Groups.  Either Party may send the other Party
           an ASR to initiate changes to the Local Interconnection Trunk Groups
           that the ordering Party desires based on the ordering Party's
           capacity assessment.  The receiving Party will issue a Firm Order
           Confirmation ("FOC") and a Design Layout Record ("DLR") to the
           ordering Party within five (5) business days after receipt of the
           ASR.

      3.   Orders that comprise a major project (i.e., new switch
           deployment) shall be submitted in a timely fashion, and their
           implementation shall be jointly planned and coordinated.

      4.   SWBT will process trunk service requests submitted via a
           properly completed ASR within twenty (20) business days of receipt
           of such ASR.  Facilities must also be in place before trunk orders
           can be completed.

      5.   In the event that a Party requires trunk servicing within
           shorter time intervals than those provided for in this Article XI
           due to a bona fide end user demand, such Party may designate its ASR
           as an "Expedite" and the other Party shall use best efforts to issue
           its FOC and DLR and install service within the requested interval.

      6.   Each Party shall be responsible for engineering their
           networks on their side of the NIP.



<PAGE>   106





X. SERVICING OBJECTIVE/DATA EXCHANGE

      Each Party agrees to service trunk groups to the foregoing blocking
criteria in a timely manner when trunk groups exceed measured blocking
thresholds on an average time consistent busy hour for a 20 business day study
period.  Upon request, each Party will make available to the other, trunk group
measurement reports for trunk groups terminating in the requesting Party's
network.  These reports will contain offered load, measured in CCS (100 call
seconds), that has been adjusted to consider the effects of overflow, retrials
and day-to-day variation.  They will also contain overflow CCS associated with
the offered load, day-to-day variation, peakedness factor, the date of the last
week in the four week study period and the number of valid days of measurement.
These reports shall be made available at a minimum on a semi-annual basis upon
request.

XI. SPECIFICATIONS

      All DS-1 and DS-3 facilities utilized for trunking established or employed
by the Parties for purposes of this STC shall meet the specifications set forth
in SWBT's TP-76625 dated June, 1990 and TP-76839 dated January, 1996.

XII. TRUNK FACILITY UNDER UTILIZATION

      At least once a year the Parties shall exchange trunk group measurement
reports as detailed above for trunk groups terminating to the other Party's
network.  Each Party will determine the required trunks for each of the other
Party's trunk groups for the previous 12 months. Required trunks will be based
on the Blocking Objectives under "Trunk Design Blocking Criteria" above and time
consistent average busy hour usage measurements from the highest 4 consecutive
week (20 business day) study.  Trunk groups with excess capacity will be
identified to the other Party as eligible for downsizing.  Excess capacity
exists when a trunk group, on a modular trunk group design basis, has 48 trunks
(2 modular digroups) or 10%, whichever is larger, over the required number of
trunks.

      The party with excess trunking capacity will assess the trunk capacity
based on forecasted requirements and agrees to disconnect trunks in excess of
forecasted requirements for the next 12 months.  If after 12 months the trunk
group continues to have excess capacity the party agrees to take timely steps to
disconnect all excess capacity.

XIII. Where available and upon the request of the other Party, each Party
      shall cooperate to ensure that its trunk groups are configured utilizing
      the B8ZS ESF protocol for 64 kbps clear channel transmission to allow for
      ISDN interoperability between the Parties' respective networks.

XIV.  INSTALLATION, MAINTENANCE, TESTING AND REPAIR.  SWBT's standard intervals
      for Feature Group D Switched Exchange Access Services will be used for
      Interconnection trunks as



<PAGE>   107





specified in the most current SWBT Accessible Letter, currently SWA96-036,
dated April 15, 1996.  The LSP shall meet the same intervals for comparable
installations, maintenance, joint testing, and repair of its facilities and
services associated with or used in conjunction with Interconnection or shall
notify SWBT of its inability to do so and will negotiate such intervals in good
faith.



<PAGE>   108





                                   SCENARIO 1


SINGLE RATE AREA - COMBINED SWBT LOCAL/ACCESS TANDEM WITHOUT DIRECT END OFFICE,
ILEC OR IXC TRUNKING

                                   [graphic]



<TABLE>
<CAPTION>
          TRAFFIC USE/MODIFIER    DESCRIPTION
          ----------------------  -----------------------------------
          <S>                     <C>
          1. DDJ                  INTRALATA AND LOCAL (SS7 SIGNALING)
          2. TCJ                  INTRALATA AND LOCAL (SS7 SIGNALING)
          3. TOCRJ                MASS CALLING (MF SIGNALING)
          4. DD800J               INTRALATA 800 (MAXIMIZER 800)(SS7 SIGNALING) #
          5. MDJ                  INTERLATA ONLY (MF SIGNALING) @
          6. MDJ                  INTERLATA ONLY (SS7 SIGNALING)
          7. ESJ                  EMERGENCY SERVICE (MF SIGNALING)
@      Required at the Dallas 4 ESS switch only for 10XXXX # cut through and
     Feature Group B over D
#      Required if SWBT does not perform the database query for the LSP
</TABLE>


                                                                 Revised 6/17/96

                                                                        LSP1.AF3



<PAGE>   109





                                   SCENARIO 2


SINGLE RATE AREA - COMBINED SWBT LOCAL/ACCESS TANDEM WITH SOME DIRECT END
OFFICE, ILEC AND IXC TRUNKING

                                   [graphic]


<TABLE>
<CAPTION>
TRAFFIC USE/MODIFIER   DESCRIPTION
- --------------------   -----------
<S>                    <C>
1. IEJ                 LOCAL ONLY (SS7 SIGNALING)
2. IEJ                 LOCAL ONLY (SS7 SIGNALING)
3. DDJ                 INTRALATA AND LOCAL (SS7 SIGNALING)
4. TCJ                 INTRALATA AND LOCAL (SS7 SIGNALING)
5. TOCRJ               MASS CALLING (MF SIGNALING)
6. DD800J              INTRALATA 800 (MAXIMIZER 800) (SS7 SIGNALING) #
7. MDJ                 INTERLATA ONLY (MF SIGNALING) @
8. MDJ                 INTERLATA ONLY (SS7 SIGNALING)
9. ESJ                 EMERGENCY SERVICE (MF SIGNALING)
@  Required at the Dallas 4 ESS switch only for 10XXXX # cut 
   through and Feature Group B over D
#  Required if SWBT does not perform the database query for 
   the LSPp
</TABLE>


                                                                 Revised 6/17/96

                                                                        LSP2.AF3



<PAGE>   110





                                   SCENARIO 3


SINGLE RATE AREA - SEPARATE SWBT LOCAL AND ACCESS TANDEMS WITHOUT DIRECT END
OFFICE, ILEC OR IXC TRUNKING

                                   [Graphic]



<TABLE>
<CAPTION>
TRAFFIC USE/MODIFIER   DESCRIPTION
- --------------------   -----------
<S>                    <C>
1. TOJ                 LOCAL ONLY (SS7 SIGNALING)
2. TGJ                 LOCAL ONLY (SS7 SIGNALING)
3. TOCRJ               MASS CALLING (MF SIGNALING)
4. DD800J              INTRALATA 800 (MAXIMIZER 800) (SS7 SIGNALING) #
5. DDJ                 INTRALATA ONLY (SS7 SIGNALING)
6. TCJ                 INTRALATA ONLY (SS7 SIGNALING)
7. MDJ                 INTERLATA ONLY (SS7 SIGNALING)
8. ESJ                 EMERGENCY SERVICE (MF SIGNALING)
#  Required if SWBT does not perform the database query for 
   the LSP.
</TABLE>


                                                                Revised 12/30/96

                                                                        LSP3.AF3



<PAGE>   111





                                   SCENARIO 4


SINGLE RATE AREA - SEPARATE SWBT LOCAL AND ACCESS TANDEMS WITH SOME DIRECT END
OFFICE, ILEC AND IXC TRUNKING

                                   [Graphic]



<TABLE>
<CAPTION>
TRAFFIC USE/MODIFIER   DESCRIPTION
- --------------------   -----------
<S>                    <C>
1.  IEJ                LOCAL ONLY (SS7 SIGNALING)
2.  IEJ                LOCAL ONLY (SS7 SIGNALING)
3.  TOJ                LOCAL ONLY (SS7 SIGNALING)
4.  TGJ                LOCAL ONLY (SS7 SIGNALING)
5.  TOCRJ              MASS CALLING (MF SIGNALING)
6.  DD800J             INTRALATA 800 (MAXIMIZER 800) (SS7 SIGNALING) #
7.  DDJ                INTRALATA ONLY (SS7 SIGNALING)
8.  TCJ                INTRALATA ONLY (SS7 SIGNALING)
9.  MDJ                INTERLATA ONLY (SS7 SIGNALING)
10. ESJ                EMERGENCY SERVICE (MF SIGNALING)
#   Required if SWBT does not perform database query for 
    the LSP.
</TABLE>


                                                                Revised 12/30/96

                                                                        LSP4.AF3



<PAGE>   112



                                   SCENARIO 5


SINGLE RATE AREA - COMBINED SWBT LOCAL/ACCESS TANDE WHERE SWBT IS THE OPERATOR
SERVICES PROVIDER FOR THE LSP

                                   [Graphic]



<TABLE>
<CAPTION>
      TRAFFIC USE/MODIFIER      DESCRIPTION
      --------------------      -----------
      <S>                       <C>
      1. VRJ                    BUSY LINE VERIFICATION (MF SIGNALING) #
      2. DAJ or DACCJ           DIRECTORY ASSISTANCE or DIRECTORY
                                ASSISTANCE CALL COMPLETION (MF SIGNALING,
                                OPERATOR SERVICES SIGNALING)
      3. ETCM2J                 0-, 0+ COMBINED COIN AND NONCOIN (MF
                                SIGNALING, OPERATOR SERVICES SIGNALING)
      4. ETCMFJ                 0-, 0+, DA, DACC COMBINED COIN AND NONCOIN
                                (MF SIGNALING, OPERATOR SERVICES SIGNALING)
</TABLE>




#    Busy Line Verification is sometimes trunked out from the TOPS Tandem
     rather than the Access Tandem.

                                                                  Revised 1/7/97

                                                                        LSP5.AF3



<PAGE>   113





                                   SCENARIO 6


SINGLE RATE AREA - COMBINED SWBT LOCAL/ACCESS TANDE WHERE SWBT IS NOT THE
OPERATOR SERVICES PROVIDER FOR THE LSP


                         121 INWARD OPERATOR ASSISTANCE

                                   [Graphic]


     Note:  This scenario would use existing Interexchange Carrier Network.

                                                                 Revised 6/17/96

                                                                        LSP6.AF3



<PAGE>   114





                                   SCENARIO 7


SINGLE RATE AREA - COMBINED SWBT LOCAL/ACCESS TANDEM WHERE SWBT IS NOT THE
OPERATOR SERVICES PROVIDER FOR THE LSP AND THE LSP'S SWITCH IS THE DESIGNATE
OPERATOR SWITCH (TTC) FOR 121 INWARD ASSISTANCE

                                   [Graphic]



<TABLE>
<CAPTION>
          TRAFFIC USE/MODIFIER    DESCRIPTION
          ----------------------  -----------------------------------
          <S>         <C>         <C>
          1.          OAJ         ACCESS TO INWARD OPERATOR (121) (MF
                                  SIGNALING)
</TABLE>


                                                                 Revised 6/17/96

                                                                        LSP7.AF3



<PAGE>   115






                                 APPENDIX LIDB

            AGREEMENT FOR THE PROVISION OF DATA BASE ADMINISTRATION
                                      AND
                   LINE INFORMATION DATA BASE (LIDB) STORAGE

This Appendix, between SWBT and LSP sets forth the terms and conditions upon
which SWBT will provide data base administration to store LSP's line/billing
records in SWBT's Line Information Data Base (LIDB).

WHEREAS, SWBT owns and maintains a Line Validation Administration System (LVAS)
that provides facilities for adding, deleting, and changing information in
LIDB; and

WHEREAS, SWBT maintains LIDB for various purposes, including the validation of
alternately billed service (ABS) requests and the provision of other services;
and

WHEREAS, LSP desires to have SWBT use LVAS to administer LSP's line information
cords for the provision of services set forth in the exhibits attached to this
Appendix; and

WHEREAS, SWBT is willing to provide, where equipment, processing capability and
hardware configurations permit, such LVAS services and LIDB storage for LSP;
and

WHEREAS, SWBT owns and maintains a Sleuth System that provides facilities for
ABS fraud monitoring; and

WHEREAS, LSP desires SWBT to use its Sleuth System for ABS fraud monitoring of
its telecommunications traffic.

NOW, THEREFORE, in consideration of the mutual promises and undertakings made,
the parties agree as follows:

1. DEFINITIONS

      As used herein and for the purpose of this Appendix, the following terms
      shall have the meanings set forth below:

      A.   Alternate Billing Services (ABS) - A service that allows end
           users to bill calls to accounts that may not be associated with the
           originating line.  There are three types of ABS calls:  calling
           card, collect and third number billed calls.

      B.   Billed Number Screening (BNS) - A process which utilizes a
           database to determine specific characteristics and/or end user
           preferences with respect to a billed number.



<PAGE>   116





      C.   Calling Card Service (CCS) - A service which enables a
           calling customer to bill a telephone call to a calling card number
           with or without the help of an operator.

      D.   Data Base - An integrated collection of related data.  In the
           case of the LIDB, the data base is the line number and related line
           information.

      E.   Data Base Administration Center (DBAC) - The LIDB input
           center where the LVAS facility and administrative personnel are
           currently located.

      F.   Exchange - For the purpose of this Appendix, a specific
           NPA-NXX combination.

      G.   Group Record - Information in LIDB or LVAS that is common to
           all lines or billing records in an NPA-NXX or NPA-RAO.

      H.   LIDB Editor - A database editor located at the SCP where LIDB
           resides.  LIDB ditor provides emergency access to LIDB that bypasses
           the service management system for LIDB.

      I.   Line Validation Administration System (LVAS) - An off-line
           administrative system, used by SWBT to add, delete and change
           information in LIDB.

      J.   Line Information Data Base (LIDB) - The line information
           database, which is an ANSI SS7 database system, functions as a
           centralized repository for data storage and retrieval.  LIDB
           supports validation and recording of ABS requests.  LIDB also
           supports storage, retrieval and recording capabilities for other
           information that can be associated with an end user's line.
           Examples of such information are, or are expected to be, originating
           screening information, ZIP code data and calling name.

      K.   Line Record - Information in LIDB or LVAS that is specific to
           a single telephone number or special billing number.

      L.   Personal Identification Number (PIN) - A confidential four
           digit code number provided to a calling card customer to prevent
           unauthorized use of his/her calling card number.  The PIN is stored
           in the LIDB for those line numbers that have an associated calling
           card.

      M.   Response - A single response in a set of predefined expected
           responses to a request for information contained in a query from a
           computer processor.



<PAGE>   117





      N.   Toll Billing Exception (TBE) - A LIDB option that allows end
           users to restrict third number billing or collect calls to their
           lines.

      O.   Service Management System (SMS) - An off-line system used to
           access, create, modify, or update information in LIDB.  For the
           purposes of this appendix, the SMS for LIDB is LVAS.

      P.   Sleuth - An off-line administration system that SWBT uses to
           monitor suspected occurrences of ABS-related fraud.  Sleuth uses a
           systematic pattern analysis of query message data to identify
           potential incidences requiring fraud investigation.  Detection
           parameters are based upon vendor recommendations and SWBT's analysis
           of collected data and are subject to change from time to time.

      Q.   Special Billing Number (SBN) Account Groups - Line records in
           LIDB that are based on an NPA-RAO numbering format.  NPA-RAO
           numbering formats are similar to NPA-NXX formats except that the
           fourth digit of an NPA-RAO line record is either a zero (0) or a one
           (1).

      R.   Tape Load Facility - A separate data entry point at the SCP
           where LIDB resides.  The Tape Load Facility provides direct access
           to LIDB for data administration that bypasses the service management
           system for SWBT's LIDB.

      S.   Translation Type - A code in the Signaling Connection Control
           Point (SCCP) of the SS7 signaling message.  Translation Types are
           used for routing LIDB queries.  Signal Transfer Points (STPs) use
           Translation Types to identify the routing table used to route a LIDB
           query.  All LIDB queries against the same exchange and Translation
           Type are routed to the same LIDB.

2.   General Description

      A.   SWBT's LIDB is connected directly to a service management
           system (i.e., LVAS), a database editor (i.e., LIDB Editor), and a
           tape load facility.  Each of these facilities, processes, or
           systems, provide SWBT with the capability of creating, modifying,
           changing, or deleting, line/billing records in LIDB.  SWBT's LIDB is
           also connected directly to an adjunct fraud monitoring system (i.e.,
           Sleuth).

      B.   SWBT will provide LSP with access to LVAS, LIDB Editor, and
           tape load facility as set forth in this Appendix and the Exhibit or
           Exhibits attached hereto.  SWBT warrants that the manner in which it
           provides such access to LSP will be equivalent to the manner in
           which SWBT provides such access to itself.



<PAGE>   118





      C.   SWBT will also provide LSP with fraud alerts from Sleuth as
           set forth in this Appendix and in Exhibit IV (Sleuth).  SWBT
           warrants that it will provide fraud alerts to LSP using the same
           fraud monitoring parameters as SWBT uses for itself.

      D.   From time-to-tome, SWBT enhances its LIDB to create new
           services and/or LIDB functionalities.  Such enhancements may involve
           the creation of new line-level or group-level data elements in LIDB.
           SWBT will coordinate with LSP to provide LSP with the opportunity
           to update its data concurrent with SWBT's updates of SWBT's own
           data.  Both parties understand and agree that some LIDB enhancements
           will require LSP to update its line/billing records with new or
           different information.

      E.   Charges for the provisioning of Data Base Administration and
           LIDB Storage are set forth in Exhibit II (Basis of Compensation).

3.   Service Description

      3.1  LVAS

            LVAS provides LSP with the capability to access, create, modify or
            update information in LIDB.  LVAS has two electronic interfaces.
            These interfaces are the Service Order Entry Interface and the
            Interactive Interface.

            3.1.1 Service Order Entry Interface

                  (A)  The Service Order Entry Interface
                       provides LSP with unbundled access to SWBT's LVAS that
                       is equivalent to SWBT's own service order entry process
                       to LVAS.  Service Order Entry Interface allows LSP to
                       electronically transmit properly formatted records from
                       LSP's service order process into LVAS.

                  (B)  LSP's access to the Service Order
                       Entry Interface will be through a remote access facility
                       (RAF).  The RAF will provide SWBT with a security
                       gateway for LSP access to the Service Order Entry
                       Interface.  The RAF will verify the validity of LSP's
                       transmissions and limit LSP's access to SWBT's Service
                       Order Entry Interface to LVAS.  LSP does not gain access
                       to any other SMS, interface, database, or operations
                       support system through this Appendix.

                  (C)  SWBT will provide LSP with the file
                       transfer protocol specifications LSP will use to
                       administer LSP's data over the



<PAGE>   119





                  Service Order Entry Interface.  LSP acknowledges that
                  transmission in such specified protocol is necessary for SWBT
                  to provide LSP with Data Base Administration and Storage.

                  (D)  LSP can choose the Service Order Entry Interface as its
                       only interface to LVAS and LIDB or the LSP can choose to
                       use this interface in conjunction with any other
                       interface that SWBT provides under this Appendix except
                       the Manual Interface.

                  (E)  SWBT will provide LSP with SWBT-specific documentation
                       for properly formatting the records LSP will transmit
                       over the Service Order Entry Interface.

                  (F)  LSP understands that its record access through the
                       Service Order Entry Interface will be limited to its own
                       line/billing records.

            3.1.2 Interactive Interface

                  (A)  The Interactive Interface provides LSP with unbundled
                       access to SWBT's LVAS that is equivalent to SWBT's access
                       at its LIDB DBAC. Interactive Interface provides LSP with
                       the ability to have its own personnel access LSP's
                       records via an application screen that is presented on a
                       computer monitor.  Once LSP has accessed one of its
                       line/billing records, LSP can perform all of the data
                       administration tasks SWBT's LIDB DBAC personnel can
                       perform on SWBT line/billing records.

                  (B)  SWBT will provide LSP with Interactive Interface through
                       a modem.  LSP understands that its record access through
                       the Interactive Interface will be limited to its own
                       line/billing records.

                  (C)  LSP will use hardware and software that is compatible
                       with LVAS hardware and software.

                  (D)  LSP can choose to request the Interactive Interface as
                       its only interface to LVAS and LIDB or the LSP can choose
                       to use this interface in conjunction with any other
                       interface that SWBT provides under this Appendix except
                       the Manual Interface.

                  (E)  SWBT will provide LSP with SWBT-specific documentation in
                       the form of screen prints and prints of help screens.



<PAGE>   120





            3.1.3 Manual Interface

                  (A)  Manual Interface is available only if the LSP has 1,000
                       line/billing records or less.  Manual Interface allows
                       LSP to fax updates to SWBT's LIDB DBAC. SWBT's LIDB DBAC
                       personnel will manually enter these faxed updates into
                       LVAS for LSP.

                  (B)  Manual Interface is not available with any other
                       interface SWBT provides under this Appendix.

                  (C)  LSP understands that its record access through the Manual
                       Interface will be limited to its own line/billing
                       records.

            3.2  Tape Load Facility Interface

                  (A)  Tape Load Facility Interface provides LSP with unbundled
                       access to SWBT's Tape Load Facility in the same manner
                       that SWBT accesses this facility. Tape Load Facility
                       Interface allows LSP to create and submit magnetic tapes
                       for input into LIDB.

                  (B)  The Tape Load Facility Interface is not an interface to
                       LVAS.  The Tape Load Facility Interface is an entry
                        point to LIDB at the SCP where LIDB resides.

                  (C)  The Tape Load Facility Interface is available only when
                       the amount of information is too large for LVAS to
                       accommodate.  Both parties agree that these situations
                       normally occur during the initial load of LSP's
                       information into LIDB or when LIDB is updated for a new
                       product.  The Tape Load Facility Interface is not
                       available for ongoing updates of information.  LSP may
                       request the Tape Load Facility Interface only when its
                       updates exceed 100,000 line/billing records over and
                       above the LSP's normal daily update processing.

                  (D)  LSP will create its own tapes in formats specified in
                       GR-446-CORE, Issue 2, June 1994, as revised.  Such tapes
                       will only include information associated with LSP's
                       line/billing records.

                  (E)  LSP will deliver a separate set of tapes, each having
                       identical information to each SCP node on which LIDB
                       resides.  SWBT will provide LSP with the name and
                       address of the SWBT employee designated to receive the
                       tapes at each location.



<PAGE>   121





                  (F)  In addition to the tapes LSP will create and deliver to
                       the SCP node locations, LSP shall deliver an additional
                       set of tapes to the LVAS System Administrator so that
                       SWBT can load LSP's updates into LVAS.  LSP understand
                       that these additional tapes must contain information
                       identical to the tapes delivered to the SCP nodes, but
                       that the format will differ.  SWBT shall provide LSP
                       SWBT-specific documentation for record formations of
                       these additional tapes.  SWBT shall use these tapes to
                       create LSP records in LVAS that correspond with the
                       records being loaded into LIDB using the Tape Load
                       Facility Interface.  SWBT shall provide LSP with the name
                       and address of the SWBT System Administrator to whom the
                       LVAS update tapes should be sent.

                  (G)  SWBT and LSP shall negotiate mutually agreed upon dates
                       and times for tape loads of LSP data when such loads are
                       the result of an LSP request.

                  (H)  LSP understands and agrees that its record access through
                       the Tape Load Facility Interface is only for LSP's own
                       line/billing records.  LSP warrants that it shall not use
                       the Tape Load Facility Interface to modify any group
                       record.  LSP further warrants that it shall not use the
                       Tape Load Facility Interface to modify any line/billing
                       record not belonging to LSP.

            3.3  LIDB Editor Interface

                  (A)  LIDB Editor Interface provides LSP with unbundled access
                       to SWBT's LIDB Editor equivalent to SWBT's manner of
                       access.  LIDB Editor provides LSP with emergency access
                       to LIDB only when LVAS is unable to access LIDB or is
                       otherwise inoperable.

                  (B)  LIDB Editor Interface is not an interface to LVAS.  LIDB
                       Editor is an SCP tool accessible only by authorized SWBT
                       employees.  LSP shall have access to SWBT employees
                       authorized to access LIDB Editor during the same times
                       and under the same conditions that SWBT has access to
                       LIDB Editor.

                  (C)  LSP understands that its record access through the LIDB
                       Editor Interface is limited to its own line/billing
                       records.

            3.4  Audits

                  SWBT shall provide LSP with access equivalent to SWBT's own
                  access to LVAS audit functionalities.



<PAGE>   122





            3.4.1 LIDB Audits

                  (A)  This audit is between LVAS and LIDB.  This audit
                       verifies that LVAS records match LIDB records.  The LIDB
                       Audit is against all line records and group record 
                       information in LVAS and LIDB, regardless of data 
                       ownership.

                  (B)  SWBT shall run the LIDB audit continuously throughout 
                       each and every day.

                  (C)  SWBT shall create a "variance file" of all LSP records 
                       that fail the LIDB audit.  LSP can access these files 
                       through the Interactive Interface.

                  (D)  LSP shall investigate accounts that fail the LIDB audit 
                       and correct any discrepancies as set forth in paragraph 
                       3(H).  LSP shall correct all discrepancies using the 
                       LVAS interface(s) LSP has requested under this Appendix.

            3.4.2 Billing System Audit

                  (A)  This type of audit is between LVAS and SWBT's billing 
                       system(s).  This audit verifies that LVAS records match 
                       SWBT's billing system records.

                  (B)  SWBT shall provide LSP with access equivalent to SWBT's 
                       own access to the billing system audit functionality.  
                       SWBT shall provide LSP with a file containing LSP 
                       records in LIDB.  LSP shall specify if the billing 
                       system audit tape will be delivered by either magnetic 
                       tape or electronically over the Service Order Entry 
                       Interface.

                  (C)  LSP shall audit its LIDB accounts against LSP's billing 
                       system and correct any discrepancies as set forth in 
                       paragraph 3(H).  LSP shall correct all discrepancies 
                       using the LVAS interface(s) LSP has requested under this
                       Appendix.

                       SWBT shall provide LSP scheduled and unscheduled billing
                       system audits as set forth below:

                        (1)  Scheduled Audits



<PAGE>   123





                              SWBT shall provide LSP with a billing system
                              audit file twice per year.  Such audit files will
                              represent LSP's entire data store in LVAS.  The
                              Parties shall mutually agree upon the dates such
                              audit files will be provided.

                        (2)  Unscheduled Audits

                              LSP can request additional audit files and SWBT
                              will work cooperatively to accommodate all
                              reasonable LSP requests for such additional audit
                              files.  Charges for additional audit files shall
                              apply as set forth in Exhibit II (Basis for
                              Compensation).

            3.5  Sleuth

                  (A)  Sleuth notification provides LSP with
                       Sleuth alert messages.  Sleuth alert messages indicate
                       potential incidences of ABS-related fraud for
                       investigation.

                  (B)  Sleuth historical reports are
                       available to LSP as set forth in Exhibit IV (Sleuth).

3. Manner of Provisioning

      (A)  SWBT shall provide to LSP, on request, SWBT-specific
           documentation regarding record formatting and associated hardware
           requirements for LSP to access each of the interfaces SWBT provides
           for LIDB data administration.

      (B)  LSP shall obtain, at its own expense, all necessary
           documentation produced by non-SWBT entities such as Bellcore.

      (C)  Magnetic tapes submitted by LSP must conform to the hardware
           specifications of each SCP node where LIDB resides.  This includes
           9-track and 8mm tapes as well as other site-specific limitations.
           SWBT shall provide LSP with all magnetic tape hardware requirements
           upon request.  LSP shall create the magnetic tapes its submits for
           input into LIDB and LVAS over the tape load interface.

      (D)  SWBT shall input information provided by LSP into LIDB for
           the NPA-NXXs and/or NPA-RAOs set forth in Exhibit I, EXCHANGES TO BE
           ADMINISTERED, attached hereto and made a part hereof.  LSP shall
           provide all information needed by SWBT to support the services being
           requested.  This information may include, but is not limited to,
           Calling Card Service information, Toll Bill Exception information
           (such as restrictions on collect



<PAGE>   124





      and third number billing), class of service information, originating line
      number screening information, ZIP code information, and calling name
      information.

      (E)  LSP shall furnish, prior to the initial LVAS load, and as
           requested by SWBT thereafter, the following forecast data:

          -    the number of working lines per account group
          -    the number of working line numbers to be established
          -    the average number of monthly changes to these records
          -    the number of busy hour queries, by query type
          -    the number of annual queries by query type

            If SWBT, at its discretion, determines that it lacks adequate
            storage, or processing capability, prior to the initial loading of
            LSP information, SWBT shall notify LSP of its intent to not provide
            to LSP the Services under this Appendix and this Appendix will be
            void.

      (F)  LSP shall furnish all line records and group records in a
           format required by SWBT to establish records in LIDB for all working
           line numbers, not just line numbers associated with calling card PIN
           or Toll Billing Exceptions (TBE).

      (G)  LSP acknowledges that SWBT's LIDB is accessible by many
           telecommunications companies and that these telecommunications
           companies expect a high degree of accuracy in the response
           information provided to their queries.  LSP shall administer its
           data in such a manner that SWBT's accuracy of response information
           is not adversely impacted.

      (H)  LSP shall verify to SWBT the line information data residing
           in LVAS by reviewing the listing of line information data provided
           by SWBT's billing system audit file.  LSP shall provide to SWBT all
           additions, deletions, and corrections resulting from its
           verification on, or before, the fourteenth business day following
           its receipt of line information verification reports produced by
           SWBT for audit processes.

      (I)  SWBT shall provide the functionality needed to perform
           certain query/response functions on a call-by-call basis for the
           line/billing records of LSP that reside in SWBT's LIDB.  Those
           query/response functions SWBT will perform are set forth in the
           Exhibits.

      (J)  With respect to all matters covered by this Appendix, each
           Party shall adopt and comply with SWBT standard operating methods
           and procedures and shall observe the rules and regulations which
           cover the administration of LVAS service and the Sleuth System, as
           set forth in SWBT practices.  The Parties acknowledge that those
           practices may be changed by SWBT from time to time.



<PAGE>   125





      (K)  Administration of the SCP on which LIDB resides, as well as
           any system or query processing logic that applies to all data
           resident on SWBT's LIDB is, and remains, the responsibility of SWBT.
           LSP acknowledges that SWBT, in its role as system administrator,
           may need to access any record in LIDB, including any such records of
           LSP.  SWBT shall limit such access to those actions necessary to
           ensure the successful operation and administration of SWBT's SCP and
           LIDB.

      (L)  LSP acknowledges that SWBT shall, in its sole discretion,
           allow or negotiate any access to SWBT's LIDB.  LSP does not gain any
           ability, by virtue of this Appendix, to determine which
           telecommunications companies are allowed to access information in
           SWBT's LIDB.  LSP acknowledges that when SWBT allows a query
           originator to access SWBT data in SWBT's LIDB, such query
           originators shall also have access to LSP's data that is also stored
           in SWBT's LIDB.

      (M)  LSP acknowledges that SWBT does not have data screening
           capability in LIDB.  Data Screening is the ability of a LIDB owner
           to deny complete or partial access to LIDB data or processes.

4.   Billing

      Compensation to SWBT for data storage and administration service and
      Sleuth services shall be based upon the rates set forth in Exhibit II
      (Basis of Compensation), attached hereto and made a part hereof.  These
      rates will apply for one (1) year from the service effective date for
      each exchange.  After one (1) year, SWBT may change the rates upon
      seventy-five (75) days' notice.  SWBT may first give such notice
      seventy-five days before the end of the first year.

      4.1 SWBT Responsibilities

            (A)  SWBT shall determine, for billing purposes, the
                 number of access lines that are administered for each NPA-NXX
                 or NPA-RAO for which SWBT performs the database administration
                 function on behalf of LSP.  SWBT shall quantify access lines
                 monthly.

            (B)  SWBT shall provide, upon written request, such
                 data as is reasonably necessary to verify billing charges for
                 data base administration update functions.  SWBT shall provide
                 this information in standard SWBT LVAS report formats.

            (C)  SWBT shall provide such data, as is reasonably
                 necessary, to enable the independent Billing Information
                 Systems (IBIS) billing statements to be



<PAGE>   126





            substantiated for query volumes of LSP line/billing records that
            reside in SWBT's LIDB.  SWBT shall provide this data to LSP in
            standard Exchange Message Record (EMR) format.

      4.2  LSP Responsibilities

            (A)  LSP shall pay SWBT the amounts billed for the
                 services rendered.

            (B)  LSP shall bill the appropriate charges to end
                 users, on behalf of third parties who query LIDB and receive a
                 response verifying the end user's willingness to accept the
                 charges for the underlying call.

            (C)  LSP shall provide to third parties, that query
                 LIDB and receive a response verifying an end user's
                 willingness to accept charges of services supported by LIDB,
                 all necessary billing information needed by the third party to
                 bill for the services provided.

      4.3  Compensation for Data Access

            (A)  Subject to the limitations in (B) below, SWBT
                 shall compensate LSP for queries against the data LSP stores
                 in SWBT's LIDB.  Queries by SWBT and LSP against the data LSP
                 stores in SWBT's LIDB shall be included in the count of
                 queries for which LSP will be compensated.  SWBT shall
                 compensate LSP by paying a percentage of the amounts SWBT
                 billed, or would have billed, for each query.  LSP
                 acknowledges that the amount SWBT bills for LIDB queries
                 against LSP's data may differ by query type, by query
                 originator, and/or may change over time.  The percentage SWBT
                 will use to calculate such credits is set forth in Exhibit II
                 (Basis of Compensation).

            (B)  LSP acknowledges that SWBT's ability to provide
                 such credit is based upon SWBT's ability to identify account
                 ownership in LIDB.  LSP acknowledges that LIDB currently
                 identifies account ownership only at the level of the group
                 record (i.e., NPA-NXX or NPA-RAO).  LSP further agrees that
                 SWBT will not provide such credit for LSP accounts that reside
                 in group records that also contain SWBT or other data owner
                 accounts.  SWBT agrees to work with its LIDB and switch
                 vendors to attempt to develop the capabilities for SWBT to
                 identify, and record for billing, the service provider of
                 individual line/billing records.  SWBT shall provide LSP
                 compensation if SWBT implements such capabilities in its
                 network.

5.   Liability



<PAGE>   127





      (A)  SWBT shall not be liable for any losses or damages arising
           out of errors, interruptions, defects, failures, or malfunction of
           LVAS, including any and all associated equipment and data processing
           systems, except such losses or damages caused by the sole negligence
           of SWBT.  Any losses or damages for which SWBT is held liable under
           this Appendix shall in no event exceed the amount of charges made
           for LVAS during the period beginning at the time SWBT receives
           notice of the error, interruption, defect, failure or malfunction to
           the time service is restored.

      (B)  SWBT shall not be liable for any losses or damages arising
           out of SWBT's administration of Sleuth.

      (C)  SWBT SHALL NOT BE LIABLE IN ANY EVENT FOR ANY SPECIAL,
           INDIRECT, INCIDENTAL, CONSEQUENTIAL, OR EXEMPLARY DAMAGES RESULTING
           FROM, OR ARISING OUT OF, OR IN CONNECTION WITH, THIS AGREEMENT.

      (D)  LSP agrees to release, indemnify, defend, and hold harmless
           SWBT from any and all claims, demands, or suits brought by a third
           party against SWBT, directly or indirectly, arising out of SWBT's
           provision of service under this Appendix.  This provision shall not
           apply to any losses, damages or other liability for which SWBT is
           found liable as a result of its sole negligence.

6. Disclaimer of Warranties

      SWBT MAKES NO REPRESENTATIONS OR WARRANTIES, EXPRESS OR IMPLIED,
      INCLUDING BUT NOT LIMITED TO ANY WARRANTY AS TO MERCHANTABILITY OR
      FITNESS FOR INTENDED OR PARTICULAR PURPOSE WITH RESPECT TO LVAS SERVICE,
      LIDB OR THE SLEUTH SYSTEM.  ADDITIONALLY, SOUTHWESTERN BELL ASSUMES NO
      RESPONSIBILITY WITH REGARD TO THE CORRECTNESS OF THE DATA SUPPLIED BY LSP
      WHEN THIS DATA IS ACCESSED AND USED BY A THIRD PARTY.



<PAGE>   128





                                 APPENDIX LIDB

                                   EXHIBIT I

                          EXCHANGES TO BE ADMINISTERED

SWBT shall provide service management system and other interface service
capabilities to LSP as set forth in this Appendix and attached Exhibit or
Exhibits for the following LSP exchanges:

<TABLE>
<S>                              <C>                        <C>
EXCHANGE NAME                    NPA NXX                    NPA-RAO
</TABLE>








_________________           __________________         __________________
_________________           __________________         __________________
_________________           __________________         __________________
_________________           __________________         __________________
_________________           __________________         __________________
_________________           __________________         __________________
_________________           __________________         __________________
_________________           __________________         __________________
_________________           __________________         __________________
_________________           __________________         __________________
_________________           __________________         __________________
_________________           __________________         __________________
_________________           __________________         __________________
_________________           __________________         __________________
_________________           __________________         __________________
_________________           __________________         __________________
_________________           __________________         __________________
_________________           __________________         __________________
_________________           __________________         __________________
_________________           __________________         __________________
_________________           __________________         __________________
_________________           __________________         __________________
_________________           __________________         __________________
_________________           __________________         __________________
  
(Attach additional copies as needed)



<PAGE>   129





                                 APPENDIX LIDB

                                   EXHIBIT II

                             BASIS OF COMPENSATION

1. COMPENSATION:

All rates and charges contained in this section are applicable in all
regulatory jurisdictions.

2. RATES AND CHARGES


<TABLE>
<CAPTION>
     Manual Interface                       Rate Per Initial Load
                                            --------------------- 
     <S>                                          <C>
     (a) Initial Load
         (1) per initial load                     $372.00
         (2) per 100 line records
             loaded                                $55.00

     (b)  Ongoing Updates                       Rate Per Month
                                                --------------
          (1)  per month                           $51.00
          (2) per 100 line records
              stored in LIDB                    $    3.75
</TABLE>



<PAGE>   130





                                 APPENDIX LIDB

                                  EXHIBIT III

              CALLING CARD AND BILLED NUMBER SCREENING VALIDATION

(A)  SWBT shall provide the functionality needed to perform the following
     query/response functions, on a call-by-call basis, for the line/billing
     records residing in SWBT's LIDB to:

            1.   Validate a 14-digit billing number where the
                 first 10 digits are a telephone number or a special billing
                 number assigned and the last four digits (PIN) are a security
                 code assignment.

            2.   Determine whether the billed line automatically
                 rejects, accepts, or requires verification of certain calls
                 billed as collect or third number.

            3.   Determine whether the billed line is a public
                 telephone number using the Class of Service information in the
                 LIDB.

B.   LSP shall bill the appropriate charges to end users, on behalf of third
     parties who query LIDB and receive a response validating the end user's
     willingness to accept the charges for the underlying call.

Approved and executed the ________________________ day of ___________, 19__.



<TABLE>
<CAPTION>
     DIGITAL TELEPORT, INC. (MISSOURI)  SOUTHWESTERN BELL TELEPHONE COMPANY
     <S>                                <C>
     By_____________________________    By_____________________________

     Title____________________________  Title____________________________

     Date____________________________   Date____________________________
</TABLE>





<PAGE>   131





                                 APPENDIX LIDB

                                   EXHIBIT IV

                                     SLEUTH

(A)  SWBT shall provide LSP with an alert notification, by fax, or another
     mutually agreed upon format, when SWBT's Sleuth system indicates the
     probability of a fraud incidence.  SWBT will use the same criteria to
     determine fraud alerts for LSP as SWBT uses for its own accounts.

(B)  Sleuth alert messages have four levels of priority.  These levels are
     low, medium, high and urgent.  Sleuth delivers alert messages to a queue
     in the Sleuth DBAC in priority order.  Urgent alerts are prioritized
     first, followed by high, medium and low alerts (in that order).

(C)  SWBT's Sleuth investigators can access alerts only in the order the
     alerts appear in the queue.  Low alerts almost never see investigator
     treatment.  However, when Sleuth encounters a number of low priority
     alerts on the same account, Sleuth may upgrade the alert's status to a
     higher priority status.

(D)  When a Sleuth investigator determines that an urgent, high, or medium
     priority alert is for an LSP account, the Sleuth investigator will print
     the alert for the queue and fax the alert to the LSP.  Sleuth alerts only
     identify potential occurrences of fraud.  The LSP receiving Sleuth alerts
     will need to perform its own investigations to determine whether a fraud
     situation actually exists.  The LSP will also need to determine what, it
     any action should it take as a result of a Sleuth alert.

(E)  SWBT's hours of operation for Sleuth are seven days a week, twenty-four
     hours per day (7X24).  LSP shall provide SWBT with a contact name and fax
     number for SWBT to fax alerts from SWBT's Sleuth DBAC.

(F)  SWBT shall provide LSP with a Sleuth contact name and number, including
     fax number, for LSP to contact the Sleuth DBAC.

(G)  For each alert notification SWBT provides to LSP, LSP may request a
     corresponding 30-day historical report of ABS-related query processing.
     LSP may request up to three reports per alert. The charge for each
     historical report is set forth in Exhibit II (Basis of Compensation).



<PAGE>   132






   Approved and executed the ______________________ day of _________, 19__.



<TABLE>
<CAPTION>
   DIGITAL TELEPORT, INC. (MISSOURI)     SOUTHWESTERN BELL TELEPHONE COMPANY
   <S>                                   <C>
   By_____________________________       By_____________________________

   Title____________________________     Title____________________________

   Date____________________________      Date____________________________
</TABLE>





<PAGE>   133





                                 APPENDIX LIDB

                                   EXHIBIT V

                           CNAM SERVICE QUERY SERVICE

Upon receipt of the line/billing information from LSP, in a format acceptable
to SWBT, SWBT will provide the functionality needed to perform the following
query/response functions, on a call-by-call basis, for the line/billing records
residing in SWBT's LIDB to identify the name associated with the line record.

Calling Name records are limited to fifteen characters.  LSP is responsible for
providing all name truncations and/or abbreviations needed to limit a calling
name to 15 characters.  LSP is also responsible for ensuring that its calling
name data does not contain obscenities in English or other languages.  Upon
receipt of Calling Name data, in a format acceptable to SWBT, SWBT will provide
the query/response functions, on a call-by-call basis, for the line/billing
records residing in SWBT's LIDB to identify the name associated with the line
record.

CNAM Service Query is SWBT's service that allows customers to query SWBT's LIDB
for calling name information.  Calling Name information means a
telecommunications company's records of all its subscribers' names associated
with one or more ten-digit telephone numbers assigned to the end user.

Approved and executed the _______________________ day of _________, 19__.


<TABLE>
<CAPTION>
  DIGITAL TELEPORT, INC. (MISSOURI)      SOUTHWESTERN BELL TELEPHONE COMPANY
  <S>                                    <C>
  By_____________________________        By_____________________________

  Title____________________________      Title____________________________

  Date____________________________       Date____________________________
</TABLE>





<PAGE>   134





                                 APPENDIX LIDB

                                   EXHIBIT VI

                   SINGLE NUMBER SERVICE (SNS) QUERY SERVICE

Upon receipt of the line/billing information from LSP, in a format acceptable
to SWBT, SWBT shall provide the functionality needed to perform the
query/response functions, on a call-by-call basis, for the line/billing records
residing in SWBT's LIDB to identify the ZIP code associated with the line
record.

Approved and executed the ______________________ day of _________, 19__.


<TABLE>
<CAPTION>
   DIGITAL TELEPORT, INC. (MISSOURI)     SOUTHWESTERN BELL TELEPHONE COMPANY
   <S>                                   <C>
   By_____________________________       By_____________________________

   Title____________________________     Title____________________________

   Date____________________________      Date____________________________
</TABLE>





<PAGE>   135





                                 APPENDIX LIDB

                                  EXHIBIT VII

                 ORIGINATING LINE NUMBER SCREENING (OLNS) QUERY

Upon receipt of the line/billing information for LSP, in a format acceptable to
SWBT, SWBT shall provide the functionality needed to perform the query/response
functions, on a call-by-call basis, for the line/billing records residing in
SWBT's LIDB to identify the originating line screening requirements of the line
record.

LSP shall ensure that its OLNS data complies with the definitions and record
formats set forth in GR-1149-CORE and GR-446-CORE.

Approved and executed the ________________________ day of __________, 19__.


<TABLE>
<CAPTION>
 DIGITAL TELEPORT, INC. (MISSOURI)       SOUTHWESTERN BELL TELEPHONE COMPANY
 <S>                                     <C>
 By_____________________________         By_____________________________

 Title____________________________       Title____________________________

 Date____________________________        Date____________________________
</TABLE>




<PAGE>   136
                                                                 APPENDIX LIDB-V
                                                                    PAGE 2 OF 14


                        APPENDIX LIDB VALIDATION SERVICE

         WHEREAS, the Parties are interested in purchasing each other's LIDB
Validation Service (or equivalent service);

         In consideration of the mutual promises contained herein, SWBT and LSP
agree as follows.

I.       DEFINITIONS

         A.       A-links means a diverse pair of facilities connecting local
                  end office switching centers with Signaling Transfer Points.

         B.       Alternate Billing Service (ABS) means a service that allows
                  end users to bill calls to accounts that may not be associated
                  with the originating line. There are three types of ABS calls:
                  calling card, collect, and third number billed calls.

         C.       Billed Number Screening (BNS) means a validation of toll
                  billing exception (TBE) data and performance of public
                  telephone checks i.e., determining if a billed line is a
                  public (including those classified as semi-public) telephone
                  number.

         D.       Calling Card Service (CCS) means a service that enables a
                  calling customer to bill a telephone call to a calling card
                  number with or without the help of an operator.

         E.       Common Channel Signaling (CCS) Network means an out-of-band,
                  packet-switched, signaling network used to transport
                  supervision signals, control signals, and data messages.
                  Validation Queries and Response messages are transported
                  across the CCS network.

         F.       Data Base means an integrated collection of related data. In
                  the case of the LIDB, the data base is the line number and
                  related line information.

         G.       Data Owner means telecommunications companies that administer
                  their own validation data in a party's LIDB or LIDB-like
                  database.

         H.       Line Information Data Base (LIDB) means an ANSI SS7
                  call-related database system. LIDB functions as a centralized
                  repository for data storage and retrieval. SWBT's LIDB
                  supports validation of ABS calls as well as certain other
                  services.

         I.       Line Record means information in LIDB that is specific to a
                  single telephone number or special billing number.

         J.       Nonrecurring charges are one-time charges that apply for a
                  specific work activity (i.e., installation or change to an
                  existing service). Nonrecurring charges are


<PAGE>   137
                                                                 APPENDIX LIDB-V
                                                                    PAGE 3 OF 14


                  applicable for the establishment of LIDB Validation
                  Service, service rearrangements, and service order activity.

         K.       Originating Point Code (OPC) means a code assigned to identify
                  LSP's operator service system location(s).

         L.       Personal Identification Number (PIN) means a confidential
                  four-digit code number provided to a calling card customer to
                  prevent unauthorized use of his/her calling card number. The
                  PIN is stored in LIDB for those line numbers that have an
                  associated calling card.

         M.       Query means a message in American National Standards
                  Institute's (ANSI) standard SS7 signaling protocol which
                  represents a request to a LIDB or LIDB-like database for
                  Validation information.

         N.       Query Rate applies to each Validation Query that is received
                  at SWBT's LIDB for the validation of calling card and toll
                  billing exception data and performance of public telephone
                  checks; i.e., determining if a billed line is a public
                  (including those classified as semi public) telephone number.

         O.       Query Transport Rate applies to each Validation Query
                  transported from SWBT's STP to the SCP where LIDB resides and
                  back. SWBT and LSP shall list their STP locations in the
                  National Exchange Carrier Association, Inc. Tariff FCC No. 4.

         P.       Response means an SS7 message which, when appropriately
                  interpreted, represents an answer to a Query.

         Q.       Service Order Charge is a nonrecurring charge that applies,
                  per service order form, that specifies the LSP's originating
                  point codes (OPCs) of the LSP's designated operator service
                  systems sending the Validation Query or Queries.

         R.       Service Control Point (SCP) is a CCS network node where
                  Validation information resides. 

         S.       Service Point (SP) means a CCS network interface element 
                  capable of initiating and/or terminating SS7 messages from 
                  an end office.

         T.       Service Rearrangements are changes to existing services which
                  do not result in changes to previously established OPCs.

         U.       Service Switching Point (SSP) means the software capability
                  within a switching point that provides the SP with SS7 message
                  preparation/interpretation capability plus SS7
                  transmission/reception access ability.

         V.       Signaling System 7 (SS7) means the signaling protocol used by
                  the CCS network.


<PAGE>   138
                                                                 APPENDIX LIDB-V
                                                                    PAGE 4 OF 14


         W.       Signaling Transfer Point (STP) is the point where a Party
                  interconnects with a CCS/SS7 network. In order to connect to
                  SWBT's SS7 network, LSP or a third party initiating LSP's
                  Validation Queries must connect with an SWBT STP in order to
                  connect to SWBT's SCP.

         X.       Special Billing Number means line records in LIDB that are
                  based on an NPA-RAO numbering format. NPA-RAO numbering
                  formats are similar to NPA-NXX formats except that the fourth
                  digit of an NPA-RAO line record is either a zero (0) or a one
                  (1).

         Y.       Toll Billing Exception (TBE) Service means a service that
                  allows end users to restrict third number billing or collect
                  calls to their lines.

         Z.       Validation information means Data Owners' records of all their
                  Calling Card Service and Toll Billing Exception Service.

II.      DESCRIPTION OF SERVICE

         A.       SWBT shall provide LSP access to Validation information
                  whenever LSP initiates a query from an SSP for Validation
                  information available in SWBT's LIDB.

         B.       All LSP Queries to SWBT's LIDB shall use a translations type
                  of 253 and a subsystem number in the calling party address
                  field that is mutually agreed upon by the Parties. LSP
                  acknowledges that such subsystem number and translation type
                  values are necessary for SWBT to properly process Validation
                  Queries to its LIDB.
     
         C.       LSP warrants SWBT that LSP shall send Queries conforming to
                  the ANSI approved standards for SS7 protocol and pursuant to
                  the specification standards documents identified in Exhibit A
                  attached hereto and incorporated by reference. Both Parties
                  acknowledge that transmission in said protocol is necessary
                  for each party to provision Validation Service (or the
                  equivalent thereof). Both Parties warrant that they shall send
                  SS7 Messages that comply with ANSI approved standards for SS7
                  protocol and pursuant to the specification standards documents
                  identified in Exhibit A. Each Party reserves the right to
                  modify its network pursuant to other specifications standards,
                  which may include Bellcore Specifications defining specific
                  service applications, message types and formats, that may
                  become necessary to meet the prevailing demands within the
                  U.S. telecommunications industry. All such changes shall be
                  announced a minimum of one hundred eighty (180) days in
                  advance of implementation through industry standard
                  procedures. Each Party will work cooperatively to coordinate
                  any necessary changes.

         D.       LSP acknowledges that CCS/SS7 network overload due to
                  extraordinary volumes


<PAGE>   139
                                                                 APPENDIX LIDB-V
                                                                    PAGE 5 OF 14

                  of Queries and/or other SS7 network messages can and will have
                  a detrimental effect on the performance of SWBT's CCS/SS7
                  network. LSP further agrees that SWBT, in its sole discretion,
                  shall employ certain automatic and/or manual overload controls
                  within SWBT's CCS/SS7 network to guard against these
                  detrimental effects. SWBT shall report to LSP any instances
                  where overload controls are invoked due to LSP's CCS/SS7
                  network and LSP agrees in such cases to take immediate
                  corrective actions as are necessary to cure the conditions
                  causing the overload situation.

         E.       Prior to SWBT initiating service under this Appendix, LSP
                  shall provide an initial forecast of busy hour Query volumes.
                  If, prior to the establishment of a mutually agreeable service
                  effective date, in writing, SWBT, at its sole discretion,
                  determines that it lacks adequate processing capability to
                  provide Validation Service to LSP, SWBT shall notify LSP of
                  SWBT's intent not to provide the services under this Appendix
                  and this Appendix will be void and have no further effect.

         F.       LSP shall update its busy hour forecast for each upcoming
                  calendar year (January - December) by October 1 of the
                  preceding year. LSP shall provide such updates each year for
                  the first three (3) years of this Appendix.

         G.       SWBT will perform testing of the LIDB Validation Service in
                  conjunction with CCS/SS7 Interconnection Service as outlined
                  in Bellcore Technical References TR-NWT-000954, TR-TSV-000905,
                  and TP 76638.

         H.       SWBT supports the performance standards as defined in Section
                  7 of TR- TSV-000905. The overall end-to-end CCS/SS7 network
                  objective is less than ten minutes unavailability per year
                  from any Signal Point (SP) to any other SP. The performance
                  objective for any single SP, including a Service Control Point
                  (SCP), is less than three minutes unavailability per year. The
                  combined link set from the SCP to the Signal Transfer Point
                  (STP) has a performance objective of less than two minutes
                  unavailability per year.

         I.       SWBT's LIDB Validation Service system downtime will be less
                  than twelve hours per year. The response time for a Query,
                  from switch transmission to reception, should not exceed one
                  second for ninety-nine (99) percent of all Queries.

         J.       SWBT shall administer its LIDB to provide acceptable service
                  levels to all customers of SWBT's LIDB Validation Service.
                  During periods of LIDB system congestion, SWBT will utilize an
                  automatic code gapping procedure to control such congestion.
                  The automatic code gapping procedure will tell LSP's switch
                  the gap (how long LSP's switch should wait before sending
                  another query) and the duration (how long the switch should
                  continue to perform gapping). For example, during an overload
                  condition, the automatic code gapping procedure


<PAGE>   140
                                                                 APPENDIX LIDB-V
                                                                    PAGE 6 OF 14

                  will tell SWBT's LIDB when to begin to drop one out of three
                  queries received. This code gapping procedure will be applied
                  uniformly to all users of SWBT's LIDB Validation Service. SWBT
                  maintains the right to invoke manual intervention of the
                  automatic code gapping procedure to preserve the integrity of
                  its network.

         K.       LSP agrees that network overload due to extraordinary volumes
                  of Queries and/or other SS7 network messages can and will have
                  a detrimental effect on the performance of SWBT's network and
                  its LIDB Validation Service. LSP further agrees to take
                  immediate, corrective actions as are necessary to cure the
                  conditions causing the overload situation.

         L.       All access by LSP to SWBT's LIDB shall occur through SWBT's
                  regional STP as designated by SWBT.

         M.       SWBT's LIDB shall contain a record for every SWBT working line
                  number and Special Billing Number served by SWBT. Other
                  telecommunications companies, including LSP, may also store
                  their data in SWBT's LIDB. SWBT shall request such
                  telecommunications companies to also provide this data as
                  well.

         N.       SWBT shall update the LIDB information; e.g., add, delete, and
                  modify customer accounts as customers move, become delinquent
                  on their account, or order new service, on a daily basis. SWBT
                  shall request other Data Owners to provide such updates in
                  like time.

         O.       SWBT has procedures in place to deactivate billing validation
                  data in the event that such data is being used fraudulently or
                  in the event end users exceed SWBT-defined limits on toll
                  charges. SWBT shall update SWBT-issued calling cards that
                  SWBT suspects of being fraudulently used or exceeding
                  SWBT-defined toll limits seven (7) days a week, 24 hours a
                  day.

         P.       SWBT's LIDB shall receive and respond to all Calling Card
                  Service and Billed Number Screening queries, including SWBT's
                  and LSP's queries, as defined in Bellcore publications
                  TR-NWT-000246, FR-NWT-000271, TR-TSV-000905, TR-NWT-000954 and
                  SWBT's publication TP 6638. These procedures shall be applied
                  uniformly to all users of SWBT's LIDB Validation Service.

         Q.       SWBT's LIDB Validation Service shall provide the following
                  functions on a per query basis:

                  -        validation of a telecommunications calling card
                           account number stored in LIDB;

                  -        determination of whether the billed line has decided
                           in advance to reject certain calls billed as collect
                           or to a third number; and


<PAGE>   141
                                                                 APPENDIX LIDB-V
                                                                    PAGE 7 OF 14


                  -        determination of billed line as a public (including
                           those classified as semi public) or nonworking
                           telephone number.

         R.       SWBT provides LIDB Validation Service as set forth in this
                  Appendix only as such service is used for LSP's activities as
                  a local service provider in SWBT's traditional serving areas
                  in the states of Arkansas, Kansas, Missouri, Oklahoma, and
                  Texas. SWBT provides a LIDB Validation Service for
                  interexchange carriers, operator service providers, and other
                  telecommunications companies under effective tariffs. LSP
                  agrees that any other use of SWBT's LIDB for the provision of
                  LIDB Validation Service by LSP, including, but not limited to,
                  when LSP acts as an LSP outside of SWBT's traditional serving
                  areas in the states of Arkansas, Kansas, Missouri, Oklahoma,
                  and Texas, and/or acts as an operator service provider to
                  other LSPs, local exchange companies, or any other
                  telecommunications company, and/or acts as an interexchange
                  carrier, will be pursuant to the terms, conditions, rates, and
                  charges of SWBT's effective tariffs, as revised, for LIDB
                  Validation Service.

III.     PRICE AND PAYMENT

         A.       LSP shall pay SWBT a Validation Query rate and a Query
                  Transport Rate for each Query initiated into SWBT's LIDB.
                  These rates are set forth in Exhibit I (Basis of
                  Compensation), which is attached hereto and incorporated by
                  reference.

         B.       LSP shall pay a Nonrecurring Charge for each request for
                  establishment or change of existing LIDB Validation Service.
                  The LIDB Validation Service Establishment Charge applies per
                  originating point code per request and is set forth in Exhibit
                  I (Basis of Compensation).

         C.       LSP shall pay a Service Order Charge for each request for
                  service order activity. The Service Order Charge is set forth
                  in Exhibit I (Basis of Compensation).

         D.       Payment to SWBT for LIDB Validation Service shall be based
                  upon the rates set forth in Exhibit I (Basis of Compensation),
                  attached hereto and made a part thereof. These rates and
                  charges will apply for one (1) year from the service effective
                  date for each exchange. After one (1) year, SWBT may change
                  the rates upon sixty (60) days' notice. SWBT may first give
                  such notice sixty (60) days before the end of the first year.

         E.       SWBT shall record usage information for LSP's Validation
                  Queries terminating to SWBT's LIDB. SWBT shall use its SCPs as
                  the source of usage data. SWBT shall aggregate usage by the
                  point code of the Query-originating SSP.

         F.       Based upon the data identified in SubSection 3.E of this
                  Appendix, SWBT shall bill LSP for its Validation Queries on a
                  monthly basis. The bill will be issued by


<PAGE>   142
                                                                 APPENDIX LIDB-V
                                                                    PAGE 8 OF 14

                  the fifteenth day of each month, and LSP shall pay the bill
                  within thirty (30) days of the bill issue date. LSP shall pay
                  late payment charges as applicable and as described in SWBT's
                  Tariff FCC No. 73.

         G.       SWBT shall provide sufficient information with the bill to
                  enable LSP to determine how the billed amount was calculated.

         H.       Depending on LSP's choice of method for transporting its
                  Queries and Responses, LSP may be required to purchase certain
                  other services, especially services that may be provided
                  pursuant to effective tariffs. In this event the prices,
                  terms, conditions, and billing for such services will be
                  specified in the applicable tariff(s) and this Appendix shall
                  not be construed to circumvent the prices, terms, conditions,
                  or billing as specified in the applicable tariff(s).

         I.       If there is a dispute associated with a monthly bill, the
                  disputing Party shall notify the other in writing within
                  ninety (90) calendar days of the date of said monthly bill or
                  the dispute shall be waived. Each Party agrees that any amount
                  of any monthly bill that that Party disputes will be paid by
                  that Party according to the terms of Subsection III.F. above.
                  Any adjustments relating to a disputed amount shall be
                  reflected on the next monthly bill issued after resolution.
                  Any credit issued upon resolution of any dispute shall bear
                  interest at the rate specified in Subsection III.F. above,
                  payable on and as of the date the credit is issued. Parties
                  shall work cooperatively and use their best efforts to resolve
                  any disputes as quickly as possible.

         J.       SWBT shall treat changes in previously established OPCs as a
                  discontinuance of the existing LIDB Validation Service and
                  establishment of a new LIDB Validation Service and all
                  applicable Nonrecurring Charges shall be paid by LSP.

         K.       If LSP acts as a telecommunications company other than a local
                  service provider, or if LSP acts as a local service provider
                  in areas outside of SWBT's traditional service areas in the
                  states of Arkansas, Kansas, Missouri, Oklahoma, and Texas, LSP
                  shall designate those point codes from which it originates
                  LIDB Validation Service Queries as an LSP acting as a local
                  service provider within SWBT's traditional service areas in
                  the states of Arkansas, Kansas, Missouri, Oklahoma, and Texas
                  from those point codes which originate LIDB Validation Service
                  Queries for all other aspects of its business. If LSP uses the
                  same OPC to originate Queries for its operations as an LSP
                  within SWBT's traditional service areas in the states of
                  Arkansas, Kansas, Missouri, Oklahoma, and Texas as it does for
                  any other aspect of its business, then LSP shall provide SWBT
                  with a percentage of use factor that SWBT can use to apportion
                  LSP's traffic between SWBT's terms, conditions, rates and
                  charges under this Appendix and the terms, conditions, rates
                  and charges under SWBT's appropriate and effective tariff. LSP
                  shall provide this factor in a whole number between one (1)
                  and one hundred (100) to indicate the percentage of LIDB
                  Validation Services LSP originates as an


<PAGE>   143
                                                                 APPENDIX LIDB-V
                                                                    PAGE 9 OF 14


                  LSP acting as a local service provider within SWBT's
                  traditional service area in the states of Arkansas, Kansas,
                  Missouri, Oklahoma, and Texas. A percentage of use factor of 1
                  (one) indicates that one percent of LSP's LIDB Validation
                  Service Queries originate as an LSP acting as a local service
                  provider within SWBT's traditional service areas in the states
                  of Arkansas, Kansas, Missouri, Oklahoma, and Texas. A
                  percentage of use factor of one hundred (100) indicates that
                  one hundred percent of LSP's LIDB Validation Service Queries
                  is from LSP acting as a local service provider within SWBT's
                  traditional service area in the states of Arkansas, Kansas,
                  Missouri, Oklahoma, and Texas.

         L.       Such percentage of use factors will be provided by LSP on the
                  LIDB Access Service Order Form used to establish the service.
                  All updates to this factor will provided via a letter. If LSP
                  does not furnish a percentage of usage factor, LSP agrees that
                  SWBT will apply a percentage of usage factor of one percent
                  (1%).

         M.       LSP shall update its percentage of use factors on a quarterly
                  basis. Effective on the first of January, April, July and
                  October of each year, LSP shall forward to SWBT, to be
                  received no later than fifteen (15) business days after the
                  first of each such month, a revised report showing the
                  percentage of use factors for the past three months ending the
                  last day of December, March, June, and September,
                  respectively, for each OPC from which LSP originates LIDB
                  Validation Service Queries. Both Parties agree that the
                  revised report will serve as the basis for the next three
                  months billing. Both Parties agree that no prorating or
                  backbilling will be done based on the report. SWBT shall use
                  the revised report to apportion usage rates, monthly rates,
                  and nonrecurring charges until a revised report is received
                  from LSP as set forth and agreed to herein.

         N.       SWBT may, upon written request by Certified U.S. mail (return
                  receipt requested), require LSP to provide call detail records
                  which will be audited to substantiate the projected percentage
                  of use factor provided by LSP. SWBT may request this detailed
                  information annually. If the audit results represent what SWBT
                  considers to be a substantial deviation from LSP's previously
                  reported percentage of use for the period upon which the audit
                  was based, and that deviation is not due to seasonal changes
                  or other identifiable reasons, LSP agrees to allow SWBT to
                  request such call detail records more than once annually. Both
                  parties agree that SWBT may make the call detail records
                  available to an independent auditor or to SWBT audit employees
                  within thirty (30) days of the request at an agreed upon
                  location during normal business hours.

         O.       If LSP fails to comply with SWBT's request for auditable call
                  detail records, SWBT may refuse additional applications for
                  service and/or refuse to complete any pending orders for
                  service for a period of thirty (30) days. If at the conclusion
                  of thirty (30) days, LSP still does not comply with this
                  request, SWBT may apply an assumed percentage of use factor of
                  one percent (1%).


<PAGE>   144
                                                                 APPENDIX LIDB-V
                                                                   PAGE 10 OF 14


IV.      OWNERSHIP OF VALIDATION INFORMATION

         A.       Telecommunications companies depositing information in SWBT's
                  LIDB may retain full and complete ownership and control over
                  such information. LSP obtains no ownership interest by virtue
                  of this Appendix.

         B.       Unless expressly authorized in writing by parties, LIDB
                  Validation Service is not to be used for purposes other than
                  those described in this Appendix. LSP may use LIDB Validation
                  Service for those functions only on a call-by-call basis. Data
                  accessed on LIDB may not be stored by LSP elsewhere for future
                  use.

         C.       Proprietary information residing in SWBT's LIDB is protected
                  from unauthorized access and LSP may not store such
                  information in any table or database for any reason. All
                  information related to alternate billing service is
                  proprietary. Examples of proprietary information are as
                  follows:

                  -        Billed (Line/Regional Accounting Office (RAO)) Number
                  -        PIN Number(s)
                  -        Billed Number Screening (BNS) indicators
                  -        Class of Service (also referred to as Service or
                           Equipment)
                  -        Reports on LIDB usage
                  -        Information related to billing for LIDB usage
                  -        LIDB usage statistics.

         D.       LSP shall not copy, store, maintain, or create any table or
                  database of any kind after initiating, and based upon a
                  Response to, a Validation Query to SWBT's LIDB.

         E.       If LSP acts on behalf of other carriers, LSP shall prohibit
                  its Query- originating carrier customers from copying,
                  storing, maintaining, or creating any table or database of any
                  kind from any Response provided by SWBT after a Validation
                  Query to SWBT's LIDB.

         F.       SWBT will share end user information, pertinent to fraud
                  investigation, with LSP when validation queries for the
                  specific end user reaches SWBT's established fraud threshold
                  level. This fraud threshold level will be applied uniformly to
                  all end user information in SWBT's LIDB.

V.       TERM AND TERMINATION

         A.       This Appendix shall become effective pursuant to Section XXVII
                  (Effective Date) of the Statement and shall continue for one
                  (1) year from the effective date of implementation of LIDB
                  Validation Service. Thereafter, this Appendix shall remain in
                  effect unless terminated by either party upon written notice
                  given sixty (60) days in advance of the termination date.


<PAGE>   145
                                                                APPENDIX LIDB-V
                                                                  PAGE 11 OF 14


         B.       If a Party materially fails to perform its obligations under
                  this Appendix, the other Party, after notifying the
                  non-performing Party of the failure to perform and allowing
                  that Party thirty (30) days after receipt of the notice to
                  cure such failure, may cancel this Appendix immediately upon
                  written notice.

         C.       Notwithstanding anything to the contrary in this Appendix, if
                  legal or regulatory decisions or rules compel SWBT or LSP to
                  terminate the Appendix, SWBT and LSP shall have no liability
                  to the other in connection with such termination.

VI.      LIMITATION OF LIABILITY

         A.       A Party's sole and exclusive remedies against the other Party
                  for injury, loss or damage caused by or arising from anything
                  said, omitted or done in connection with this Appendix
                  regardless of the form of action, whither in contract or in
                  tort (including negligence or strict liability) shall be the
                  amount of actual direct damages and in no event shall exceed
                  the amount paid for LIDB Validation Service.

         B.       The remedies in Section VI.A. of this Appendix shall be
                  exclusive of all other remedies against a Party, its
                  affiliates, subsidiaries or parent corporation, (including
                  their directors, officers, employees or agents).

         C.       In no event shall a Party have any liability for system outage
                  or inaccessibility, or for losses arising from the
                  unauthorized use of the data by LIDB Validation Service Query
                  purchasers.

         D.       SWBT is furnishing access to its LIDB or LIDB-like database in
                  order to facilitate LSP's provision of Alternate Billing
                  Service to its end users, but not to insure against the risk
                  of completion of an ABS-related call. While SWBT agrees to
                  make every reasonable attempt to provide accurate Validation
                  information, the Parties acknowledge that Validation
                  information is the product of routine business service order
                  activity and fraud investigations. LSP acknowledges that SWBT
                  can furnish Validation information only as accurate and
                  current as the information has been provided to SWBT for
                  inclusion in its LIDB. Therefore, SWBT, in addition to the
                  limitations of liability set forth, is not liable for
                  inaccuracies in the Validation information records provided to
                  LSP except such inaccuracies caused by SWBT's willful or
                  wanton misconduct or gross negligence.

         E.       IN NO EVENT SHALL SWBT, ITS AFFILIATES, SUBSIDIARIES OR PARENT
                  CORPORATION, (INCLUDING ITS DIRECTORS, OFFICERS, EMPLOYEES OR
                  AGENTS) HAVE ANY LIABILITY WHATSOEVER TO OR THROUGH LSP FOR
                  ANY INDIRECT, SPECIAL, OR CONSEQUENTIAL DAMAGES, INCLUDING,
                  BUT NOT LIMITED TO LOSS OF ANTICIPATED PROFITS OR REVENUE OR
                  OTHER ECONOMIC LOSS


<PAGE>   146
                                                                APPENDIX LIDB-V
                                                                  PAGE 12 OF 14

                  IN CONNECTION WITH OR ARISING FROM ANYTHING SAID, OMITTED OR
                  DONE HEREUNDER, EVEN IF LSP HAS BEEN ADVISED OF THE
                  POSSIBILITY OF SUCH DAMAGES.

VII.     COMMUNICATION AND NOTICES

         A.       Ordering and billing inquiries for the services described
                  herein from SWBT shall be directed to the Local Service
                  Provider Service Center (LSPSC). Ordering shall be done
                  through the LSPSC using the form attached hereto as Exhibit
                  III.

VIII.    CONFIDENTIALITY

         A.       Identification SWBT and LSP recognize and acknowledge that, in
                  connection with the services to be provided hereunder, either
                  may disclose to the other party proprietary or confidential
                  customer, technical or business information in written
                  graphic, oral or other tangible or intangible forms. In order
                  for such information to be considered "Proprietary
                  Information" under this Appendix, such information must be
                  marked "Confidential" or "Proprietary" or bear a marking of
                  similar import. Orally disclosed information shall be
                  considered Proprietary Information only if contemporaneously
                  identified as such and reduced to writing and delivered to the
                  other party with a statement or marking of confidentiality
                  within twenty (20) calendar days after oral disclosure.

         B.       Nondisclosure. Subject to Sections 8C through 8F, the Party
                  (the___"Receiving Party") that receives Proprietary 
                  Information from the other Party (the "Disclosing Party") 
                  agrees: 

                  (1)      That all Proprietary Information shall be and shall
                           remain the exclusive property of the Disclosing
                           Party.

                  (2)      To limit access to such Proprietary Information to
                           authorized employees and other individuals who have a
                           need to know the Proprietary Information in order to
                           perform its obligations under this Appendix.

                  (3)      To keep such Proprietary Information confidential and
                           to use the same level of care to prevent disclosure
                           or unauthorized use of the received Proprietary
                           Information as it exercises in protecting its own
                           Proprietary Information of a similar nature.

                  (4)      For a period of three (3) years following any
                           disclosure, not to copy or publish or disclose such
                           Proprietary Information to others or authorize anyone
                           else to copy or publish or disclose such Proprietary
                           Information to others without the prior written
                           approval of the Disclosing Party.


<PAGE>   147
                                                                APPENDIX LIDB-V
                                                                  PAGE 13 OF 14


                  (5)     To use such Proprietary Information only for purposes
                          of performing its obligations under this Appendix and
                          for other purposes only upon such terms as may be
                          agreed upon between the Parties in writing.

         C.       Required Disclosures. The Receiving Party agrees to give
                  notice to the Disclosing Party of any demand to disclose or
                  provide Proprietary Information of the Disclosing Party to
                  another person, under lawful process, prior to disclosing or
                  furnishing such Proprietary Information. Further, the
                  Receiving Party agrees to reasonably cooperate if the
                  Disclosing Party deems it necessary to seek protective
                  arrangements. The Receiving Party may disclose or provide
                  Proprietary Information of the Disclosing Party to meet the
                  requirements of a court, regulatory body or government agency
                  having jurisdiction over the Party; provided, however, that
                  the Receiving Party shall notify the Disclosing Party so as to
                  give the Disclosing Party a reasonable opportunity to object
                  to such disclosure. The Disclosing Party may not unreasonably
                  withhold approval of protective arrangements provided by any
                  such court, regulatory body or government agency. Nothing
                  herein requires either Party to support the position of any
                  person or entity as to whether any particular Proprietary
                  Information is proprietary under applicable law or this
                  Section 8.

         D.       Exceptions. Notwithstanding anything to the contrary contained
                  in this Appendix, the Proprietary Information described herein
                  shall not be deemed confidential or proprietary and the
                  Receiving Party shall have no obligation to prevent disclosure
                  of such Proprietary Information if such Proprietary
                  Information: 

                  (1)      is already known to the Receiving Party;

                  (2)      is or becomes publicly known, through publication,
                           inspection of the product, or otherwise, and through
                           no wrongful act of the Receiving Party;

                  (3)      is received from a third party without similar
                           restriction and without breach of this Section 8;

                  (4)      is independently developed, produced or generated by
                           the Receiving Party;

                  (5)      is furnished to a third party by the Disclosing Party
                           without a similar restriction on the third party's
                           rights; or

                  (6)      is approved for release by written authorization of
                           the Disclosing Party, but only to the extent of such
                           authorization.

         E.       Permitted Uses. SWBT shall be permitted to use Proprietary
                  Information obtained through recording the volume of LSP
                  Queries for the purposes of: (a) estimation of facilities
                  usage for jurisdictional separations; (b) engineering and


<PAGE>   148
                                                                APPENDIX LIDB-V
                                                                  PAGE 14 OF 14

                  network planning of facilities; and (c) measurement for 
                  billing purposes.

         F.       Legal Requirements. Notwithstanding anything to the contrary
                  contained in this Agreement, a Party's ability to disclose
                  Proprietary Information or use disclosed Proprietary
                  Information is subject all applicable statures, decisions, and
                  regulatory rules concerning the disclosure and use of such
                  Proprietary Information which, by their express terms, mandate
                  a different handling of such information.

9.       Mutuality

         To the extent that LSP stores its own Validation Information in a
         database, LSP agrees that Validation Information shall be available to
         SWBT on terms and conditions comparable to those contained in this
         Appendix. Such terms and conditions shall include, but not be limited
         to, making such Validation Information available on a platform
         technically similar to that employed by SWBT, and at a rate comparable
         to that charged by SWBT.

10.      Attached and incorporated herein are:

         Exhibit I    -  Basis of Compensation
         Exhibit II   -  Specifications and Standards
         Exhibit III  -  LIDB Access Service Order Form


<PAGE>   149
                                                      APPENDIX LIDB-V-EXHIBIT I
                                                                    PAGE 1 OF 1



                                 APPENDIX LIDB-V
                              BASIS OF COMPENSATION
1.  COMPENSATION:
    
    All rates and charges contained in this section are applicable in all
    regulatory jurisdictions.
    
2.  Rates and Charges
    
    A   LIDB Query                                           Rate Per Ouery
                                                             --------------
    
        1. Per LIDB Query Transport                             $.0045
        2. Per LIDB Validation Query                            $.026
        
           -  Billed Number Screening
           -  Calling Card Count
    
    B.  LIDB Nonrecurring Charge                             Nonrecurring Charge
                                                             -------------------
        1. Per Originating Point Code (OPC)                     $14.25
    
        2. Per LIDB Validation Service Form                     $256.70


<PAGE>   150

                                                      APPENDIX LIDB-V EXHIBIT II
                                                                     PAGE 1 OF 1



                                 APPENDIX LIDB-V

                          SPECIFICATIONS AND STANDARDS

<TABLE>
<CAPTION>

Issuing Organization                                                            Document Number
- --------------------                                                            ----------------
<S>                                                                             <C>   
Bellcore                                                                        TR-NWT-000246

Bellcore                                                                        TR-NWT-000271

Bellcore                                                                        TR-TSV-000905

Bellcore                                                                        TR-NWT-000954

SWBT                                                                            TP 76638


</TABLE>

<PAGE>   151
Southwestern Bell Telephone Company                                  EXHIBIT III
Customer Provided Factor Reports                                  September 1996
                                                                          Page 1
                  LIDB ACCESS VALIDATION SERVICES ORDER FORM



CUSTOMER NAME
              ----------------------------------------------------------------

CARRIER CUSTOMER NAME ABBREVIATION
(CCNA - THREE ALPHA CHARACTERS)   --------------------------------------------


CUSTOMER ADDRESS

- ------------------------------------------------------------------------------

CUSTOMER BILLING NAME
                      --------------------------------------------------------
(IF DIFFERENT THAN CUSTOMER NAME)

ACCESS CUSTOMER NAME ABBREVIATION
                                 ---------------------------------------------
(ACNA - THREE ALPHA CHARACTERS)

CUSTOMER BILLING ADDRESS
                         -----------------------------------------------------
(IF DIFFERENT THAN CUSTOMER ADDRESS)

CITY, STATE, ZIP CODE
                      --------------------------------------------------------

CUSTOMER BILLING CONTACT NAME AND TELEPHONE NUMBER
                                                  ----------------------------
                                (      )
- ------------------------------------------------------------------------------

CREDIT INFORMATION: TYPE OF OWNERSHIP
         (S - SOLE OWNER; C - INCORP.; P - PARTNERSHIP)

IF INCORPORATED:
STATE WHERE INCORP.                 DATE INCORP.
                    -----------                   ------------

CHARTER NUMBER
              ----------------------------------------------
PRES.NAME                                      OFC. TEL. NO. (   )
          -----------------------------------                ------------------

V.P. NAME                                      OFC. TEL. NO. (  )
          ----------------------------------                 ------------------
                                            
SECT.NAME                                      OFC. TEL. NO. (  )
          ----------------------------------                 ------------------
                                            
TREA. NAME                                     OFC. TEL. NO. (  )
           ---------------------------------                 ------------------
                                            
IF PARTNERSHIP:                             
PARTNERS NAME                                  OFC. TEL. NO. (  )
              ------------------------------                 ------------------
                                            
PARTNERS NAME                                  OFC. TEL. NO. (  )
              ------------------------------                  -----------------
                                            
PARTNERS NAME                                  OFC. TEL. NO. (  )
              ------------------------------                 ------------------
                                            
PARTNERS NAME                                  OFC. TEL. NO. (  )
              ------------------------------                 ------------------
LETTER OF AGENCY DATED                         SIGNATURE
                       ---------------------            -----------------------







<PAGE>   152
Southwestern Bell Telephone Company                                 EXHIBIT III
Customer Provided Factor Reports                                 September 1996
                                                                         Page 2


SWBT ORDER NUMBER
                  -------------------
DESIRED DUE DATE                      FIRM DUE DATE
                 --------------------               -----------------------

FOR NEW SERVICE, THE APPROXIMATE NUMBER OF NPA NXXs
                                                    -----------------------

TYPE OF ACTIVITY          (N - NEW OR ADD; C - CHANGE; D - DISCONNECT; S - SUPP)
                 ---------

BILLING ACCOUNT NUMBER (BAN)
                             ----------------------------------------------

CUSTOMER ORDER CONTACT NAME, ADDRESS, ZIP CODE, AND TELEPHONE NUMBER:

- -------------------------------------

- -------------------------------------
                       (   )
- ----------------------  ---  ---------

CUSTOMER TECHNICAL CONTACT NAME AND TELEPHONE NUMBER:

                                                             (    )
- ------------------------------------------------------------- ---- -------------

CPOC SVC. REP. CONTACT NAME AND TELEPHONE NUMBER:

                                                              (   )
- ------------------------------------------------------------- ---- -------------

*SWBT CKR:                                  *TWO SIX CODE:
         -----------------------------------              --------------------
         (SWBT ID OF CCS/SS7 INTERCONN. SVC.)

1.
   --------------------
2.
   --------------------
3.
   --------------------
4.
   --------------------

*THIS INFORMATION SHOULD BE OBTAINED BY THE LIDB CUSTOMER FROM THEIR CCS/SS7
INTERCONNECTION SERVICE PROVIDER. 



<PAGE>   153
Southwestern Bell Telephone Company                                 EXHIBIT III
Customer Provided Factor Reports                                 September 1996 
                                                                         Page 3

LIDB VALIDATION SERVICE ____ CALLING NAME SERVICE____

ORIGINATING LINE NUMBER SCREENING _____


              ACT.     ORIGINATING POINT  ACT.  ORIGINATING POINT
              TYPE     CODES:             TYPE  CODES:

              [S]      [C]                [C]   [C]

              -------  -----------------  ----  -----------------

              -------  -----------------  ----  -----------------

              -------  -----------------  ----  -----------------

              -------  -----------------  ----  -----------------

              -------  -----------------  ----  -----------------

              -------  -----------------  ----  -----------------

              -------  -----------------  ----  -----------------

              -------  -----------------  ----  -----------------

              -------  -----------------  ----  -----------------

              -------  -----------------  ----  -----------------

              -------  -----------------  ----  -----------------

              -------  -----------------  ----  -----------------

              -------  -----------------  ----  -----------------

              -------  -----------------  ----  -----------------

              -------  -----------------  ----  -----------------

              -------  -----------------  ----  -----------------

              -------  -----------------  ----  -----------------

              -------  -----------------  ----  -----------------

              -------  -----------------  ----  -----------------

              -------  -----------------  ----  -----------------

              -------  -----------------  ----  -----------------

              -------  -----------------  ----  -----------------

              -------  -----------------  ----  -----------------

              -------  -----------------  ----  -----------------

              -------  -----------------  ----  -----------------

              -------  -----------------  ----  -----------------

              -------  -----------------  ----  -----------------

              -------  -----------------  ----  -----------------

              -------  -----------------  ----  -----------------

              -------  -----------------  ----  -----------------

              -------  -----------------  ----  -----------------

              -------  -----------------  ----  -----------------

              -------  -----------------  ----  -----------------

              -------  -----------------  ----  -----------------

              -------  -----------------  ----  -----------------

REMARKS
        ----------------------------------------------------------------------
- ------------------------------------------------------------------------------
- ------------------------------------------------------------------------------

DATE AND TIME RECEIVED IN THE CPOC
<PAGE>   154
Southwestern Bell Telephone Company                                 EXHIBIT III
Customer Provided Factor Reports                                 September 1996 
                                                                         Page 4

LIDB VALIDATION SERVICE ____ CALLING NAME SERVICE____

ORIGINATING LINE NUMBER SCREENING _____

              ACT.     ORIGINATING POINT  ACT.  ORIGINATING POINT
              TYPE     CODES:             TYPE  CODES:

              -------  -----------------  ----  -----------------

              -------  -----------------  ----  -----------------

              -------  -----------------  ----  -----------------

              -------  -----------------  ----  -----------------

              -------  -----------------  ----  -----------------

              -------  -----------------  ----  -----------------

              -------  -----------------  ----  -----------------

              -------  -----------------  ----  -----------------

              -------  -----------------  ----  -----------------

              -------  -----------------  ----  -----------------

              -------  -----------------  ----  -----------------

              -------  -----------------  ----  -----------------

              -------  -----------------  ----  -----------------

              -------  -----------------  ----  -----------------

              -------  -----------------  ----  -----------------

              -------  -----------------  ----  -----------------

              -------  -----------------  ----  -----------------

              -------  -----------------  ----  -----------------

              -------  -----------------  ----  -----------------

              -------  -----------------  ----  -----------------

              -------  -----------------  ----  -----------------

              -------  -----------------  ----  -----------------

              -------  -----------------  ----  -----------------

              -------  -----------------  ----  -----------------

              -------  -----------------  ----  -----------------

              -------  -----------------  ----  -----------------

              -------  -----------------  ----  -----------------

              -------  -----------------  ----  -----------------

              -------  -----------------  ----  -----------------

              -------  -----------------  ----  -----------------

              -------  -----------------  ----  -----------------

              -------  -----------------  ----  -----------------

              -------  -----------------  ----  -----------------

              -------  -----------------  ----  -----------------

              -------  -----------------  ----  -----------------

REMARKS
       -----------------------------------------------------------------------
- ------------------------------------------------------------------------------
- ------------------------------------------------------------------------------

DATE AND TIME RECEIVED IN THE CPOC


<PAGE>   155
Southwestern Bell Telephone Company                                 EXHIBIT III
Customer Provided Factor Reports                                 September 1996
                                                                         Page 5

                    LIDB ACCESS VALIDATION SERVICE ORDER FORM

                                  INSTRUCTIONS

THE LIDB ACCESS VALIDATION SERVICE ORDER FORM CONSISTS OF FOUR PAGES.

PAGE 1 -  ALL THE INFORMATION ON THIS PAGE IS FOR ADMINISTRATIVE USE IN
          ESTABLISHING THE LIDB BILLING ACCOUNT. ALL OF THE INFORMATION IS
          REQUIRED ON THE INITIAL ORDER. ORDERS SUBMITTED SUBSEQUENT TO THE
          ESTABLISHED ACCOUNT WILL REQUIRE ONLY THE CUSTOMER'S NAME AND ADDRESS.
          THE OTHER ENTRIES WILL BE REQUIRED ONLY IF THERE IS A CHANGE TO THE
          ORIGINAL INFORMATION.

PAGE 2 -  ALL THE INFORMATION ON PAGE TWO IS FOR THE REQUESTED ACTIVITY.
          THIS INFORMATION WILL ALWAYS BE REQUIRED.

1.   DESIRED DUE DATE/FIRM DUE DATE - APPROXIMATE NUMBER OF NPA NXXs
     
     ***DESIRED DUE DATE IS USED WHEN A FIRM DUE DATE HAS NOT BEEN
     COORDINATED WITH THE LIDB CUSTOMER PRIOR TO THE SUBMISSION OF THE ORDER
     FORM TO THE ICSC.
     
     THE LIDB CUSTOMER WILL ENTER THEIR DESIRED DATE FOR THEIR LIDB SERVICE
     TO BE ESTABLISHED AND THE APPROXIMATE NUMBER OF NPA NXXs ASSOCIATED
     WITH THE NEW SERVICE.
     
     IF THE ORDER IS FOR SUBSEQUENT ACTIVITY TO AN ESTABLISHED ACCOUNT, THE
     APPROXIMATE NUMBER OF NPA NXXs WILL NOT BE REQUIRED.
     
     ***FIRM DUE DATE IS USED WHEN THE CUSTOMER'S ACCOUNT MANAGER HAS
     COORDINATED WITH THE SNAC TO ESTABLISH THE DUE DATE PRIOR TO THE ORDER
     FORM BEING SENT TO THE CPOC.



<PAGE>   156
Southwestern Bell Telephone Company                                 EXHIBIT III
Customer Provided Factor Reports                                 September 1996
                                                                         Page 6

PAGE 2 INSTRUCTIONS CONTINUED -

2.   TYPE OF ACTIVITY
     
     N - SHOULD BE ENTERED TO ESTABLISH A LIDB SERVICE CAN ALSO BE ENTERED
         TO ADD ADDITIONAL POINT CODES TO AN EXISTING SERVICE
     
     C - SHOULD BE ENTERED TO ADD POINT CODES TO OR DELETE POINT CODES FROM
         AN EXISTING SERVICE
     
     D - SHOULD BE ENTERED TO COMPLETELY DISCONNECT AN EXISTING SERVICE
     
     S - SHOULD BE ENTERED TO MAKE A CHANGE ON A CURRENT ORDER PRIOR TO THE
         COMPLETION DATE (i.e., CHANGE DUE DATE, CORRECT POINT CODE(S), 
         ETC.)
     
3.   BILLING ACCOUNT NUMBER (BAN)
     
     THE SWBT BILLING ACCOUNT NUMBER OF THE VALIDATION SERVICE AND/OR THE 
     CALLING NAME SERVICE
     
     IF THE ORDER IS FOR NEW SERVICE, THIS FIELD WILL BE BLANK
     
4.   CUSTOMER ORDER CONTACT...
     
     A CONTACT WITH THE CUSTOMER THAT THE CPOC CAN COORDINATE WITH FOR THE
     DESIRED DUE DATE OR CORRECTIONS TO AN ORDER.
     
5.   CUSTOMER TECHNICAL CONTACT...
     
     A TECHNICAL CONTACT WITH THE CUSTOMER THAT THE SWBT SNAC CAN COORDINATE
     WITH FOR THE PROVISIONING OF THE SERVICE.
     
6.   CPOC SERVICE REP....
     
     THE SWBT CPOC SERVICE REPRESENTATIVE THAT NEGOTIATES THE ORDER WILL
     ENTER THEIR NAME AND CONTACT INFORMATION.
     
7.   SWBT CKR AND TWO SIX CODE
     
     THIS INFORMATION WILL BE OBTAINED BY THE LIDB CUSTOMER FROM THEIR ORDER
     TO ESTABLISH THEIR CCS/SS7 INTERCONNECTION SERVICE OR FROM THEIR
     CCS/SS7 INTERCONNECTION SERVICE PROVIDER. THERE WILL ALWAYS BE FOUR
     LINKS FOR ACCESS TO THE LIDB.


<PAGE>   157

Southwestern Bell Telephone Company                                 EXHIBIT III
Customer Provided Factor Reports                                 September 1996
                                                                         Page 7

INSTRUCTIONS FOR PAGES 3 & 4 -

LIDB HAS THREE QUERY SERVICES: VALIDATION, CALLING NAME (CNAM), AND ORIGINATING 
                               LINE NUMBER SCREENING (OLNS)

THERE IS NOT A SPECIFIC NUMBER OF POINT CODES REQUIRED FOR ANY LIDB SERVICE. THE
LIDB CUSTOMER CAN SUBMIT AS MANY COPIES OF PAGES 3 & 4 AS REQUIRED FOR THEIR
POINT CODES PER REQUEST.

THE VALIDATION, CNAM, AND OLNS WILL BE ESTABLISHED ON A SINGLE BILLING ACCOUNT.
IF THE LIDB CUSTOMER WOULD LIKE SEPARATE BILLING ACCOUNTS, THEN SEPARATE BANs
MUST BE REQUESTED (i.e. "ESTABLISH SEPARATE BILLING ACCOUNTS") IN THE BILLING
ACCOUNT NUMBER FIELD ON PAGE 2. IF AN EXISTING LIDB CUSTOMER WANTS TO ESTABLISH
THEIR LIDB CNAM ON A SEPARATE BILLING ACCOUNT, THEN THE LIDB CUSTOMER SHOULD
ENTER "NEW BAN (OR SEPARATE BAN) FOR THE LIDB CNAM SERVICE" IN THE BILLING
ACCOUNT NUMBER FIELD ON PAGE 2. THE SAME WILL APPLY FOR A SEPARATE BAN FOR OLNS.
IN ORDER TO SET UP SEPARATE BILLING ACCOUNTS, THE POINT CODES FOR THE LIDB
VALIDATION, CNAM, AND OLNS SERVICES CANNOT BE THE SAME. THE CUSTOMER WILL USE
BOTH PAGES 3 & 4 TO SUBMIT THEIR POINT CODES SEPARATELY FOR SEPARATE BILLING
ACCOUNTS. 

1. LIDB VALIDATION SERVICE ______CALLING NAME SERVICE ______ 
   ORIGINATING LINE NUMBER SCREENING _____

   ENTER A CHECK MARK OR AN "X" TO INDICATE WHICH OF THE LIDB SERVICES THE ORDER
   FORM IS REQUESTING TO ESTABLISH OR DELETE. IF ALL LIDB SERVICES ARE REQUESTED
   ON THE SAME ORDER, THE POINT CODES FOR EACH SERVICE MUST BE LISTED ON
   SEPARATE PAGES. THIS WILL ENABLE SWBT TO APPLY THE CORRECT NONRECURRING
   CHARGES.

2. ACTIVITY TYPES

   IF A LIDB CUSTOMER NEEDS TO CHANGE AN EXISTING OPC ON AN ESTABLISHED ACCOUNT,
   THE "D" SHOULD BE USED TO INDICATE THE OPC CHANGING FROM AND THE "N" SHOULD
   BE USED TO INDICATE THE OPC CHANGING TO.


<PAGE>   158

Southwestern Bell Telephone Company                                EXHIBIT III
Customer Provided Factor Reports                                 September 1996
                                                                         Page 8

PAGES 3 & 4 INSTRUCTIONS CONTINUED -

LIST OF ORIGINATING POINT CODES AND ACTIVITY TYPE

ACTIVITY TYPES:   N - ESTABLISHING OR ADDING NEW POINT CODE(S)
                  D - DELETE EXISTING POINT CODE(S)

PLEASE NOTE IN THE FOLLOWING EXAMPLES, THE ORDER FORM ACTIVITY IS THE ENTRY FROM
PAGE 2, NUMBER 3. THIS IS NOT THE ACTIVITY TYPE.

EXAMPLE 1 - ORDER FORM ACTIVITY IS "N" TO ESTABLISH A NEW ACCOUNT AND SERVICE

<TABLE>
<CAPTION>

ACT.                       ORIGINATING POINT         ACT.                       ORIGINATING POINT 
TYPE                       CODES:                    TYPE                       CODES:
<S>                        <C>                      <C>                         <C>   
N                          XXX-XXX-XXX               N                          XXX-XXX-XXX

</TABLE>


EXAMPLE 2 - ORDER FORM ACTIVITY IS "C" TO CHANGE AN EXISTING POINT CODE OR TO 
ADD A NEW POINT CODE AND DELETE AN EXISTING POINT CODE


<TABLE>
<CAPTION>

ACT.                       ORIGINATING POINT         ACT.                       ORIGINATING POINT 
TYPE                       CODES:                    TYPE                       CODES:
<S>                        <C>                      <C>                         <C>   
N                          XXX-XXX-XXX               D                          XXX-XXX-XXX
</TABLE>

EXAMPLE 3 - ORDER FORM ACTIVITY IS "D" TO DISCONNECT THE ACCOUNT AND THE SERVICE

<TABLE>
<CAPTION>

ACT.                       ORIGINATING POINT         ACT.                       ORIGINATING POINT 
TYPE                       CODES:                    TYPE                       CODES:
<S>                        <C>                      <C>                         <C>   
D                          XXX-XXX-XXX               D                          XXX-XXX-XXX

</TABLE>

THE REMARKS SECTION MAY BE UTILIZED BY SWBT OR THE LIDB CUSTOMER.

THE DATE AND TIME RECEIVED WILL BE ENTERED BY THE SWBT CPOC UPON RECEIPT OF THE
FORM.

AFTER THE FORM HAS BEEN COMPLETED, IT SHOULD BE MAILED OR FAXED TO THE SWBT ICSC
IN ST. LOUIS, MISSOURI.


<PAGE>   159
                                                                   APPENDIX OSS
                                                                         PAGE 2



                                  APPENDIX OSS

                 ACCESS TO OPERATIONS SUPPORT SYSTEMS FUNCTIONS

                                  APPENDIX OSS

                 ACCESS TO OPERATIONS SUPPORT SYSTEMS FUNCTIONS

1.       GENERAL CONDITIONS

         1.1 This Appendix sets forth the terms and conditions under which SWBT
provides nondiscriminatory access to SWBT's operations support systems (OSS)
"functions" to LSP for pre-ordering, ordering, provisioning, maintenance /
repair, and billing. Such functions will be made available as described herein
for Resold Services, as provided in Appendix Resale, and for Unbundled Network
Elements (UNE), as provided in Appendix UNE.

          1.2 The functions, for Resale and UNE, will be accessible via
electronic interface, as described herein, where such functions are available.
Manual access will be available to all preordering, ordering, provisioning, and
billing functions via the Local Service Provider Service Center (LSPSC). Repair
and maintenance functions are available via manual handling by the Local Service
Provider Center (LSPC).

          1.3 LSP agrees to utilize SWBT electronic interfaces, as SWBT defines
in its requirements, only for the functions described herein for the purposes of
establishing and maintaining Resale services or UNE. LSP agrees that such use
will comply with the summary of SWBT's Operating Practice No. 113, Protection of
Electronic Information, titled Local Service Provider Security Policies and
Guidelines.

          1.4 LSP acknowledges and agrees that access to OSS functions will only
be utilized to view an end-user's Customer Proprietary Network Information under
the conditions set forth and agreed to in Exhibit A of this Appendix.

          1.5 By utilizing electronic interfaces to access OSS functions, LSP
acknowledges and agrees to perform accurate and correct billing functions that
occur during ordering per the terms of this Agreement. Further, LSP recognizes
that such billing functions for conversion orders require viewing CPNI as
described in 1.4 above. All exception handling must be requested manually from
LSPSC.

          1.6 In areas where Resale and UNE service order transactions cannot be
provided via an electronic interface for the pre-order, ordering and
provisioning processes, SWBT and LSP will utilize manual processes until such
time as the transactions can be electronically transmitted.

          1.7 SWBT will provide a help desk function for electronic system
interfaces.

          1.8 SWBT and LSP will jointly establish interface contingency and
disaster recovery plans for the pre-order, ordering and provisioning of Resale
services and UNE.

          1.9 SWBT reserves the right to modify or discontinue the use of any
system or interface as it deems appropriate.


<PAGE>   160
                                                                   APPENDIX OSS
                                                                         PAGE 3


          1.10 If LSP elects to utilize industry standardized electronic
interfaces for Resale or UNE, SWBT and LSP agree to work together in the Order
and Billing Forum (OBF) and the Telecommunications Industry Forum (TCIF) to
establish and conform to uniform industry standards for electronic interfaces
for pre-order, ordering, and provisioning. Neither Party waives its rights as
participants in such forums in the implementation of the standards. To achieve
industry standard system functionality as quickly as possible, the Parties
acknowledge that SWBT may deploy these interfaces with requirements developed in
advance of industry standards. Thus, subsequent modifications may be necessary
to comply with emerging standards. LSP and SWBT are individually responsible for
evaluating the risk of developing their respective systems in advance of
standards and agree to support their own system modifications to comply with new
requirements.

2.        PRE-ORDER

         2.1 SWBT will provide access to pre-order functions to support LSP
ordering of Resale services and UNE via several electronic interfaces. The
Parties acknowledge that ordering requirements necessitate the use of current,
real time pre-order information to accurately build service orders. The
following lists represent pre-order information that will be available to LSP so
that LSP order requests may be created to comply with SWBT ordering
requirements.

         2.2      PRE-ORDERING FUNCTIONS FOR RESALE SERVICES WILL INCLUDE:

                  2.2.1 customer name, billing address and residence or business
address, billed telephone numbers and features and services available in the end
office where the customer is provisioned;

                  2.2.2 features and services to which the customer subscribes
(LSP agrees that LSP's representatives will not access the information specified
in this Subsection until after the customer requests that the customer's local
exchange service provider be changed to LSP and such request complies with
conditions of Exhibit A of this Appendix.)

                  2.2.3 a telephone number (if the customer does not have one
assigned) with the customer on-line.

                  2.2.4 service availability dates to the customer;

                  2.2.5 information regarding the dispatch / installation
schedule, if applicable;

                  2.2.6 PIC options for intraLATA toll (when available) and
interLATA toll;

                  2.2.7 address verification.

         2.3      PRE-ORDERING FUNCTIONS FOR UNE WILL INCLUDE:

                  2.3.1 customer name, billing address and residence or business
address, billed telephone numbers and features and services available in the end
office where the customer is


<PAGE>   161
                                                                   APPENDIX OSS
                                                                         PAGE 4

provisioned;

                  2.3.2 features and services to which the customer subscribes
(LSP agrees that LSP's representatives will not access the information specified
in this Subsection until after the customer requests that the customer's local
exchange service provider be changed to LSP, and such request complies with
conditions of Exhibit A of this Appendix.)

                  2.3.3 telephone number (if the customer does not have one
assigned) with the customer on-line; 

                  2.3.4 PIC options for intraLATA toll (when available) and 
interLATA toll;

                  2.3.5    address verification;

                  2.3.6 channel facility assignment (CFA), network channel (NC),
and network channel interface (NCI) data.

         2.4.     Electronic Access to Pre-Order Functions: Upon request by
LSP for electronic access to pre-ordering functions, SWBT will provide LSP
access to one or more of the following systems:

                  2.4.1    RESALE SERVICES PRE-ORDER SYSTEM AVAILABILITY:

                           2.4.1.1 Residential Easy Access Sales Environment
(R-EASE): R-EASE is an ordering entry system through which SWBT will provide LSP
access for the functions of pre-ordering SWBT's Resale services so long as EASE
is utilized to order SWBT Residential Resale Services.

                           2.4.1.2 Business Easy Access Sales Environment
(EASE): B-EASE is an ordering entry system through which SWBT will provide LSP
access for the functions of preordering SWBT's Resale services so long as such
access is utilized to order SWBT's Business Resale Services.

                  2.4.2    RESALE AND UNE PRE-ORDER SYSTEM AVAILABILITY:

                           2.4.2.1 DataGate: DataGate is transaction-based data
query system through which SWBT will provide LSP access for the functions of
gathering pre-ordering information to support industry standardized ordering
processes for Residential and Business Resale services. When ordering Resale
services or UNE, LSP's representatives will have access to a pre-order
electronic gateway provided by SWBT for both consumer and business customers
that provides real-time access to SWBT's operations systems. This gateway shall
be a Transmission Control Protocol/Internet Protocol (TCP/IP) gateway and will
allow the LSP representatives to perform the pre-order functions for Resale
services and UNE, as described above. SWBT and LSP agree to work together to
develop and implement an electronic communication interface that will replace
this initial pre-order electronic interface consistent with industry standards
developed by the OBF and the TCIF.

                           2.4.2.2 VERIGATE is an Access Service Pre-order
system that will also provide access to the pre-ordering functions for Resale
Services and UNE. VERIGATE


<PAGE>   162
                                                                   APPENDIX OSS
                                                                         PAGE 5

may be used in connection with electronic or manual ordering. VERIGATE provides
the UNE pre-order capability of identifying CFA information, NC, and NCI codes
that are associated with order requirements for UNE.

         2.5 OTHER PRE-ORDER FUNCTION AVAILABILITY:

             2.5.1 Where due dates are not available electronically, SWBT will
provide LSP with due date interval for inclusion in the service order request.

             2.5.2 In addition to electronic interface access to pre-order
information, upon request, SWBT will provide LSP pre-order information in batch
transmission for the purposes of back-up data for periods of system
unavailability. The parties recognize such information must be used to construct
order requests only in exception handling.

3.       ORDERING/PROVISIONING

         3.1 SWBT will provide access to ordering functions to support LSP
provisioning of Resale services and UNE via one or more electronic interfaces.
Upon request for electronic access to ordering functions, SWBT will provide LSP
access to one or more of the following systems or interfaces:

         3.2 RESALE SERVICES ORDER REQUEST SYSTEM AVAILABILITY:

             3.2.1 R-EASE is available for the generation of Residential Resale
services orders. Ordering Flows will be available via these systems for the
following ordering functions: Conversion ("as is" or "with changes"); Change
(Features, Listings, Long Distance); New Connect; Disconnect; From and To
(change of premises with same service).

             3.2.2 B-EASE is available for the generation of Business Resale
services orders. Ordering Flows will be available via these systems for the
following ordering functions: Conversion ("as is" or "with changes"); Change
(Features, Listings, Long Distance); New Connect; Disconnect; From and To
(change of premises with same service).

             3.2.3 SWBT will provide LSP with an Electronic Data Interexchange
(EDI) Interface for transmission of industry-standardized Resale service order
requests in formats as defined by the Ordering and Billing Forum (OBF) and EDI
mapping as defined by TCIF. EDI ordering functionality will be made available as
negotiated and implemented in timeframes mutually acceptable to SWBT and LSP.

         3.3 UNE SERVICE ORDER REQUEST ORDERING SYSTEM AVAILABILITY:

             3.3.1 In ordering and provisioning UNE, LSP and SWBT will utilize
mutually agreeable standard industry order formats and data elements developed
by OBF and TCIF EDI. Where industry standards do not currently exist for the
ordering and provisioning of UNE, LSP and SWBT agree to jointly develop a form
for ordering Common-Use UNE. Common-Use UNE, including, without limitation,
tandem switching, signaling and call-related databases, Operator Services and
DA, and Operations Support Systems, shall be ordered in a manner that is
consistent with OBF Access Service Request Process; in addition customized
routing will be ordered in the same manner. Customer Specific UNE, including,
Local Loop (which includes

<PAGE>   163
                                                                   APPENDIX OSS
                                                                         PAGE 6

NID), and unbundled Local Switching, and Interim Number Portability will be
ordered consistent with the OBF Local Service Request (LSR) process.

         3.4 SWBT will provision Resale Services and UNE as prescribed in LSP
order requests. Access to status on such orders of Resale services and UNE will
be provided via the following electronic interfaces:

             3.4.1 Customer Network Administration (CNA) will allow LSP to check
service order status via CNA.

             3.4.2 In cases of industry-standardized EDI ordering, SWBT will
provide to LSP an EDI electronic interface for transferring and receiving
orders, Firm Order Confirmation (FOC), service completion, and, as available,
other provisioning data and information. SWBT will provide LSP with a FOC for
each Resale and UNE order. The FOC includes but is not necessarily limited to:
purchase order number, telephone number, Local Service Request number, due date,
Service Order number, and completion date. Upon work completion, SWBT will
provide LSP with an 855 EDI transaction-based Order Completion that states when
that order was completed. When available, SWBT will provide LSP an 865 EDI
transaction-based Order Completion.

             3.4.3 A file transmission may be provided to confirm order
completions for R-EASE or B-EASE order processing. This file will provide
service order information of all distributed and completed orders for LSP,
regardless of order entry mechanism.

4.       MAINTENANCE/REPAIR

         4.1 Two electronic interfaces are accessible to place, and check the
status of, trouble reports for both Resale and UNE. Upon request, LSP may access
these functions via the following methods:

             4.1.1 CNA system access provides LSP with SWBT software that allows
LSP to submit trouble reports and subsequently check status on trouble reports
for LSP end-users. CNA will provide ability to review the maintenance history of
a converted Resale LSP account.

             4.1.2 Electronic Bonding Interface (EBI) is an
industry-standardized interface that is available for trouble report submission
and status updates. This EBI will conform to ANSI standards T1:227:1995 and
T1.228:1995, Electronic Communications Implementation Committee (ECIC) Trouble
Report Format Definition (TFRD) Number 1 as defined in ECIC document
ECIC/TRA/95-003, and all standards referenced within those documents, as
mutually agreed upon by LSP and SWBT. Functions currently implemented will
include Enter Trouble, Request Trouble Report Status, Add Trouble Information,
Modify Trouble Report Attributes, Trouble Report Attribute Value Change
Notification, and Cancel Trouble Report, as explained in 6 and 9 of ANSI
T1.228:1995. LSP. SWBT will exchange requests over a mutually agreeable
X.25-based network.

5.       BILLING

         5.1 SWBT shall bill LSP for resold services and UNE. SWBT shall send
associated billing information to LSP as necessary to allow LSP to perform
billing functions. At minimum


<PAGE>   164
                                                                   APPENDIX OSS
                                                                         PAGE 7


SWBT will provide LSP billing information in a paper format or via magnetic
tape, as agreed to between LSP and SWBT.

         5.2 Upon request, electronic access to billing information for Resale
Services will also be available via the following interfaces:

             5.2.1 LSP may receive Bill Plus(tm), an electronic version of their
electronic bill as described in and in accordance with SWBT's Local Exchange
Tariff.

             5.2.2 LSP may receive a mechanized bill format via the industry
standards EDI.

             5.2.3 LSP may also view billing information through the CNA system.

             5.2.4 SWBT shall provide the Usage Billable Records for Resale
Services via EMR industry standard format with a daily feed.

             5.2.5 LSP may receive Local Disconnect Report records (via CARE
records) electronically that indicate when LSP's customers change their local
service provider.

         5.3 Upon request, electronic access to billing information for UNE will
also be available via the following interfaces:

             5.3.1 SWBT will make available a mechanized bill data tape (local)
format by February 1997.

             5.3.2 LSP may also view billing information through the CNA system.

             5.3.3 SWBT shall provide the Usage/Toll Billable Records for UNE
via EMR industry standard format with a daily feed.

             5.2.4 LSP may receive Local Disconnect Report records (via CARE
records) electronically that indicate when LSP's customers, utilizing SWBT
ports, change their local service provider.

6.       REMOTE ACCESS FACILITY

         6.1 LSP must access the following SWBT's OSS functions via a LSP Remote
Access Facility (LRAF) located in Dallas, Texas: R-EASE, B-EASE, CNA, DATAGATE
and VERIGATE.

         6.2 LSP may use three types of access: Switched, Private Line, and
Frame Relay. For Private Line and Frame Relay connections, LSP shall provide its
own router, circuit, and two Channel Service Units/Data Service Units (CSU/DSU).
The demarcation point shall be the router interface at the LRAF. Switched Access
connections require LSP to provide its own modems and connection to the SWBT
LRAF. LSP shall pay the cost of the call if Switched Access is used.

         6.3 LSP shall use TCP/IP to access SWBT OSS via the LRAF. In addition,
each LSP shall have a valid Internet Protocol (IP) network address. A user-id
/password unique to each


<PAGE>   165
                                                                   APPENDIX OSS
                                                                         PAGE 8

individual accessing an OSS shall be maintained to access SWBT OSS's. LSP shall
provide estimates regarding its volume of transactions, number of concurrent
users, desired number of private line or dial-up (switched) connections, and
length of a typical session.

         6.4 LSP shall attend and participate in implementation meetings to
discuss LSP LRAF access plans in detail and schedule testing of such
connections. SWBT shall make a Help Desk function available to assist LSP on an
ongoing basis in accessing any SWBT OSS over the LRAF.


7.       OPERATIONAL READINESS TEST (ORT) FOR ORDERING/PROVISIONING

         7.1 LSP must participate with SWBT in Operational Readiness Testing
(ORT), which will allow for the testing of the systems, interfaces, and
processes for the ordering and provisioning of Resale services. ORT will be
completed in conformance with agreed upon implementation dates.

8.       RATES - OKLAHOMA

         8.1 LSP requesting access to one or more of the SWBT OSS functions
(i.e., preordering, ordering / provisioning, maintenance / repair, billing)
agrees to pay the following rate:

               System Access                      $ 3,310.00 / month

         8.2 LSP requesting functions via interfaces that require connection to
the Remote Access Facility, as described in section 6, agrees to pay the
following rate(s) depending upon on method of access utilized:

         Remote Access Facility Access Methods
               Direct Connection Per Port         $ 1,595.00 / month
               Dial Up Per Port                   $   320.00 / month

         8.4 LPS requesting the Bill Plus, as described in 5.2.1, agrees to pay
applicable tariffed rate, less Resale discount.

         8.3 LSP requesting the billing function for Usage Billable Records, as
described in 5.2.4, agrees to pay $.003 per message transmitted.

         8.4 LSP requesting the Local Disconnect Report, as described in 5.2.5,
agrees to pay $0.10 per record transmitted.

         8.4 Should unforeseen modifications and costs to provision OSS
functions become required by SWBT or industry standards, SWBT reserves the right
to modify its rate structure. In addition, should LSP request custom development
of an exclusive interface to support OSS functions, such development will be
considered by SWBT on an Individual Case Basis (ICB) and priced as such.

9.       EFFECTIVE DATE, TERM

         9.1 The Appendix OSS will be effective upon approval by the state
commission when



<PAGE>   166
                                                                 APPENDIX OSS
                                                                       PAGE 9

it determined that the entire Interconnection Agreement is in compliance with
Sections 251 and 252 of the Act.

         9.2 The Term Appendix OSS will be the shorter of the Term of this
Interconnection Agreement or December 31, 1998. Continuation of Appendix OSS
follows the continuation rules of the Agreement. Should the Interconnection
Agreement establish a new term, the Term of Appendix OSS will be the shorter of
one year, or the new Term of the Interconnection Agreement. Should the term of
the Interconnection Agreement Expire without provision for continuance, the Term
of Appendix OSS expires as well.


<PAGE>   167
                                       APPENDIX OSS - RESALE & UNE - EXHIBIT A
                                                                   PAGE 1 OF 1

          BLANKET CERTIFICATION FOR END-USER AUTHORIZATION FOR RELEASE
               OF CUSTOMER PROPRIETARY NETWORK INFORMATION (CPNI)

The undersigned hereby agrees:

Before it may obtain CPNI of an end-user, whether via an independent request or
in the course of ordering SWBT's network elements or services via manual and/or
mechanized interfaces, the undersigned must, at least, certify that "yes" (Y) it
has obtained Authorization for Release of CPNI and provide the name of the
individual authorizing the release of CPNI. By these indications, the
undersigned affirms that a current Authorization for the Release of CPNI has
been opined from an end-user and that it includes the expressed content of the
language, "Minimum Scope." SWBT may then provide the CPNI referenced herein.

         Minimum Scope: Authorization for the release of CPNI

         1)       An affirmative written request that substantially reflects
                  the following: "This document serves as instruction to all
                  holders of my local exchange telecommunications Customer
                  Proprietary Network Information (CPNI) to provide such
                  information to the undersigned. I understand that this CPNI
                  includes the following information: billing name, service
                  address, billing address, service and feature subscription,
                  directory listing information long distance carrier identity,
                  and all pending service order activity. This Authorization
                  remains in effect until such time that I revoke it directly or
                  appoint another individual/company with such capacity or
                  undersigned receives notice to disconnect my local exchange
                  service or notice that a service disconnect has been
                  performed. At and from such time, this Authorization is null
                  and void."

         or

         2)       Authorization for change in local exchange service and
                  release of CPNI with documentation that adheres to all
                  requirements of state and federal law, as applicable.


                                                -------------------------------
                                                Signed

                                                -------------------------------
                                                Name (Typed/Printed)

                                                -------------------------------
                                                Title
                                                
                                                -------------------------------
                                                Company
                                                
                                                -------------------------------
                                                Date


<PAGE>   168
                                                    APPENDIX OSS - RESALE & UNE 
                                                                 SIGNATURE PAGE
                                                                    PAGE 1 OF 1


DIGITAL TELEPORT, INC. (MISSOURI)         SOUTHWESTERN BELL TELEPHONE COMPANY

By:                                       By:                             
     -------------------------------          ---------------------------------
         (name printed or typed)                   (name printed or typed)

Signature:                                Signature:
          --------------------------                ---------------------------
Title:                                    Title:
         ---------------------------              -----------------------------
             (printed or typed)                       (printed or typed)

Date:                                     Date:
      ------------------------------              ----------------------------




<PAGE>   169
                                                                     APPENDIX OS
                                                                     PAGE 2 OF 8



                                  APPENDIX OS

                               OPERATOR SERVICES

This Appendix sets forth the terms and conditions under which Southwestern Bell
Telephone Company ("SWBT") agrees to provide Operator Services for LSP ("LSP").

I.   SERVICES

     SWBT will provide the following Operator Services:

      A.   FULLY AUTOMATED CALL PROCESSING - Allows the caller to
           complete a call utilizing equipment without the assistance of a SWBT
           operator, hereafter called "Operator."

           This allows the caller the option of completing calls through an
           automated alternate billing system (AABS).  Automated functions can
           only be activated from a touch-tone telephone.  Use of a rotary
           telephone and failure or low response by the caller to the audio
           prompts will bridge the caller to an Operator for assistance.  The
           called party must also have Touch-tone service to automatically
           accept calls that are billed collect or to a third number.

      B.   OPERATOR-ASSISTED CALL PROCESSING - Allows the caller to
           complete a call by receiving assistance from an Operator.

II.  DEFINITIONS

      A. FULLY AUTOMATED CALL PROCESSING

     SWBT will support the following fully automated call types for LSP:

            1.    FULLY AUTOMATED CALLING CARD STATION-TO-STATION - This service
                  is provided when the caller dials zero ("0"), plus the desired
                  telephone number and the telecommunications calling card
                  number to which the call is to be charged. The call is
                  completed without the assistance of an Operator. An authorized
                  telecommunications calling card for the purpose of this
                  Appendix, is one for which SWBT can perform billing
                  validation. Fully-Automated Calling Card Call Service may also
                  include the following situations:

                  a.   When an individual with a disability
                       dials zero (0) and identifies himself or herself as
                       disabled, he or she will provide the Operator the
                       desired telephone number and the calling card number to
                       which the call is to be billed.


<PAGE>   170

                                                                     APPENDIX OS
                                                                     PAGE 3 OF 8


                  b.   When due to trouble on the network,
                       or lack of service components (facilities to the AABS
                       network), the automated call processing cannot be
                       completed without assistance from an Operator.

                  c.   When an Operator reestablishes an
                       interrupted call that meets any of the situations
                       described in this call type.

            2.    FULLY AUTOMATED STATION-TO-STATION - This service is limited
                  to those calls placed collect or billed to a third number. The
                  caller dials zero (0) plus the telephone number desired, the
                  service selection codes and/or billing information as
                  instructed by the automated equipment. The call is completed
                  without the assistance of an Operator. Fully Automated
                  Station-to-Station service may also include the following
                  situations:

                  a.   When an individual with a disability
                       identifies himself or herself as disabled and provides
                       the Operator the number to which the call is to be
                       billed (either collect or third number).

                  b.   When due to trouble on the network or
                       lack of service components, the automated call cannot be
                       completed without assistance from an Operator.

                  c.   When an Operator reestablishes an
                       interrupted call that meets any of the situations
                       described in this call type.

     B. OPERATOR-ASSISTED CALL PROCESSING

     SWBT will support the following operator-assisted call types for LSP:

            1.    SEMI-AUTOMATED STATION-TO-STATION - A service provided when
                  the caller dials zero (0) plus the telephone number desired
                  and the call is completed with the assistance of an Operator.
                  Semi-Automated Station-to-Station service may also include the
                  following situations:

                  a.   Where the caller does not dial zero
                       (0) prior to calling the number desired from a public or
                       semi-public telephone, or from a telephone where the
                       call is routed directly to an Operator (excluding
                       calling card calls).

                  b.   When an Operator re-establishes an
                       interrupted call that meets any of the situations
                       described in this call type.

            2.    SEMI-AUTOMATED PERSON-TO-PERSON - A service in which the
                  caller dials zero (0) plus the telephone number desired and
                  specifies to the
<PAGE>   171

                                                                     APPENDIX OS
                                                                     PAGE 4 OF 8


                  Operator the particular person to be reached or a particular
                  PBX station, department or office be reached through a PBX
                  attendant. This service applies even if the caller agrees,
                  after the connection is established, to speak to any party
                  other than the party previously specified. Semi-Automated
                  Person-to-Person service may also include:

                  a.   Where the caller does not dial a zero
                       (0) prior to dialing the number from a public or
                       semi-public telephone, or where the call is routed
                       directly to an Operator.

                  b.   When an operator reestablishes an
                       interrupted call that meets any of the situations
                       described in this call type.

            3.    SEMI-AUTOMATED CALLING CARD STATION-TO-STATION - A service
                  provided when the caller dials zero (0) plus the desired
                  telephone number and provides the Operator the calling card
                  number to which the call is to be charged. Semi-Automated
                  Calling Card Station-to-Station service may also include the
                  following situations:

                  a.   When the caller does not dial zero
                       (0) prior to dialing the number desired from a public or
                       semi-public telephone, or from a telephone that is
                       directly routed to an Operator, and the call is billed
                       to a calling card.

                  b.   When an Operator reestablishes an
                       interrupted call that meets any of the situations
                       described in this call type.

            4.    STATION-TO-STATION (OPERATOR HANDLED) - A service provided
                  when the caller dials zero (0) and places a sent paid,
                  collect, third number or calling card station-to-station call
                  using an Operator's assistance. These calls may originate from
                  a private, public or semi-public telephone. The service may
                  also include the situation when an Operator reestablishes an
                  interrupted call that meets any of the situations described in
                  this call type.

            5.    PERSON-TO-PERSON (OPERATOR HANDLED) - A service in which the
                  caller dials zero (0) and specifies to the Operator the number
                  desired and the person to be reached, or a particular PBX
                  station, department or office to be reached through a PBX
                  attendant, or a particular mobile service point to be reached
                  through a mobile telephone attendant. The call remains a
                  person-to-person call even if the caller agrees, after the
                  connection is established, to speak to any party other than
                  the party previously specified. The service may also include
                  situations when an Operator reestablishes an interrupted call
                  that meets any of the situations described in this call type.


<PAGE>   172

                                                                     APPENDIX OS
                                                                     PAGE 5 OF 8


            6.    LINE STATUS VERIFICATION - A service in which the caller asks
                  the Operator to determine the condition of a telephone line.

            7.    BUSY LINE INTERRUPT - A service in which the caller asks the
                  Operator to interrupt a conversation in progress, to determine
                  if one of the parties is willing to speak to the caller
                  requesting the interrupt. A Busy Line Interrupt charge will
                  apply even if no conversation is in progress at the time of
                  the interrupt attempt, or when the parties interrupted refuse
                  to terminate the conversation in progress.

            8.    0PERATOR TRANSFER SERVICE - A service offered by SWBT in which
                  the local caller requires Operator Assistance for completion
                  of a call outside the originating LATA. The SWBT Operator
                  transfers the call to an interexchange carrier selected by the
                  caller from a list of IXCs provided to SWBT by the LSP. This
                  transfer service is similar to SWBT's "0perator Transfer"
                  service offering. LSP agrees to obtain all necessary
                  compensation arrangements between LSP and participating
                  carriers.

            9.    MISCELLANEOUS - Includes the following call types: General
                  Assistance and Rate Quotes, 800, 888 and connections to all
                  other Toll Free services, Repair Bureau and Business Office
                  requests, credit requests, NPA-NXX location requests, and all
                  other 0- No Attempt services.

III. CALL BRANDING AND RATE REFERENCE REQUIREMENTS

      A.   REQUIREMENTS - Pursuant to Section 226 (b) of The Telecommunications
           Act of 1996, each provider of Operator Services is required to:

            1.    provide its brand at the beginning of each telephone call and
                  before the consumer incurs any charge for the call; and

            2.    disclose immediately to the consumer, upon request a quote of
                  its rates or charges for the call.

      B.   CALL BRANDING - In compliance with A. 1. above, SWBT will brand
           Operator Services in LSP's name based upon the criteria outlined
           below:

            1.   LSP will provide SWBT with written specification
                 of its company name to be used in creating LSP specific
                 branding messages for its OS calls.

            2.   An initial non-recurring charge applies per TOPS
                 switch, per load for the establishment of Call Branding as
                 well as a charge per TOPS switch, per subsequent load to
                 change the brand.  In addition, a per call charge applies for
                 every Operator Services call handled by SWBT on behalf of LSP
                 when such 
<PAGE>   173

                                                                     APPENDIX OS
                                                                     PAGE 6 OF 8

                  services are provided in conjunction with: i) the purchase of
                  SWBT's unbundled local switching; or ii) when multiple brands
                  are required on a single Operator Services trunk. Prices for
                  Call Branding are as outlined in Exhibit II, attached hereto
                  and incorporated herein.

      C.   OPERATOR SERVICES (OS) RATE/REFERENCE INFORMATION - In compliance
           with A. 2. above, SWBT will provide LSP Operator Services
           Rate/Reference Information based upon the criteria outlined below:

           1.     LSP will furnish OS Rate and Reference Information in a
                  mutually agreed to format or media thirty (30) days in advance
                  of the date when the Operator Services are to be undertaken.

           2.     LSP will inform SWBT, in writing, of any changes to be made to
                  such Rate/Reference Information ten (10) working days prior to
                  the effective Rate/Reference change date. LSP acknowledges
                  that it is responsible to provide SWBT updated Rate/Reference
                  Information in advance of when the Rates/Reference Information
                  are to become effective.

           3.     In all cases when a SWBT Operator receives a rate request from
                  a LSP end user, SWBT will quote the applicable OS rates as
                  provided by LSP.

           4.     An initial non-recurring charge will apply per TOPS switch for
                  loading of LSP's Operator Services Rate/Reference Information
                  as well as a charge per TOPS switch, for each subsequent
                  change to either LSP's Operator Services Rate or Reference
                  Information.

IV. HANDLING OF EMERGENCY CALLS TO OPERATOR

    To the extent LSP's NXX encompasses multiple emergency agencies, SWBT will
    agree to query the caller on his/her community and to transfer the caller to
    the appropriate emergency agency for the caller's area. LSP must provide
    SWBT with the correct information to enable the transfer. When the
    assistance of another Carrier's operator is required, SWBT will attempt to
    reach the appropriate operator if the network facilities for inward
    assistance exist. LSP agrees to indemnify SWBT for any misdirected calls.

V. RESPONSIBILITIES OF THE PARTIES

      A.   SWBT will be the sole provider of Operator Services for LSP's local
           service area(s) listed in Exhibit I, which is attached to this
           Appendix, beginning on the service effective date also shown in
           Exhibit I. SWBT will provide Operator Services only where the
           necessary physical facilities are available and in place and under
           conditions previously stated in this Appendix.
<PAGE>   174
                                                                     APPENDIX OS
                                                                     PAGE 7 OF 8

      B.   LSP will be responsible for providing the equipment and facilities
           necessary for signaling and routing calls with Automatic Number
           Identification (ANI) to each SWBT operator switch. Should LSP seek to
           provide interexchange Operator Services under this agreement, it is
           responsible for ordering the necessary facilities through SWBT's
           interstate or intrastate Access Service tariffs. Nothing in this
           agreement in any way changes the manner in which an interexchange
           Carrier obtains access service for the purpose of originating or
           terminating interexchange traffic.

      C.   Facilities necessary for the provision of Operator Services shall be
           provided by the parties hereto, using standard trunk traffic
           engineering procedures to insure that the objective grade of service
           is met. Each party shall bear the costs for its own facilities. LSP
           shall bear the costs of facilities necessary for signaling and
           routing calls with Automatic Number Identification (ANI) to each SWBT
           operator switch. SWBT shall bear the cost of facilities and equipment
           necessary to provide Operator Services.

      D.   LSP will furnish in writing to SWBT, thirty (30) days in advance of
           the date when the Operator Services are to be undertaken, unless
           otherwise agreed to by the SWBT, all records required by SWBT to
           provide the Operator Services.

      E.   LSP will keep all records furnished to SWBT current by using
           reporting forms and procedures that are mutually acceptable to both
           parties, and will inform SWBT in advance of any changes to be made in
           such records. SWBT will specify the required interval for such
           advance notice. LSP will provide all records and changes to records
           to SWBT in writing or in any other mutually agreeable format.

      F.   SWBT will accumulate and provide the LSP such data as necessary for
           the LSP to verify traffic volumes and bill its end users.

VI.   METHODS AND PRACTICES

      SWBT will provide the Operator Services to LSP's end users in accordance
      with SWBT's OS methods and practices in effect for SWBT at the time the
      OS call is made, unless otherwise agreed in writing by both parties.

VII.  PRICING

      Pricing for Operator Services shall be based on the rates specified in
      Exhibit II, PRICING, which is attached and made part of this Appendix.
      The rates will apply from the service effective date through the term of
      this agreement as specified in paragraph X., A. below.  At any time
      beyond the specified or the term of this Appendix, SWBt may change the
      prices for the provision of OS upon one hundred-twenty (120) days' notice
      to LSP.
<PAGE>   175
                                                                     APPENDIX OS
                                                                     PAGE 8 OF 8

VIII. MONTHLY BILLING

      SWBT will render monthly billing statements to LSP, and remittance in
      full will be due within thirty (30) days of receipt.

IX.   LIABILITY

      A.   In addition to the liability provisions contained in the Agreement,
           LSP agrees to defend, indemnify, and hold harmless SWBT from any and
           all losses, damages, or other liability including attorneys fees that
           LSP may incur as a result of claims, demands, wrongful death actions,
           or other suits brought by any party that arise out of LSP's end users
           use of Operator Services. LSP shall defend against all end user
           claims just as if LSP had provided such service to its end user with
           the LSP's own operators and shall assert its tariff limitation of
           liability for benefit of both SWBT and LSP.

      B.   LSP also agrees to release, defend, indemnify, and hold harmless SWBT
           from any claim, demand or suit that asserts any infringement or
           invasion of privacy or confidentiality of any person or persons
           caused or claimed to be caused, directly, or indirectly, by SWBT
           employees and equipment associated with provision of the Operator
           Services. This provision includes but is not limited to suits arising
           from disclosure of the telephone number, address, or name associated
           with the telephone called or the telephone used to call the Operator
           Services.

X.    TERMS OF APPENDIX

      A.   Unless sooner terminated, this Appendix will continue in force for a
           period of one (l) year from the effective date of this agreement and
           thereafter until terminated by one hundred-twenty (120) days notice
           in writing from either Party to the other.

      B.   If LSP terminates this agreement prior to the agreed-upon term of
           this Appendix, LSP shall pay, within thirty (30) days of the issuance
           of a final bill by SWBT, all amounts due for actual services provided
           under this Appendix, plus estimated monthly charges for the remainder
           of the term. Estimated charges will be based on an average of the
           actual monthly amounts billed by SWBT pursuant to this Appendix 
           prior to its termination.

      C.   The rates applicable for determining the amount(s) under the terms
           outlined in this Section are those specified in Exhibit II.








<PAGE>   176

                                                         APPENDIX OS - EXHIBIT I
                                                                     PAGE 1 OF 1



                                 APPENDIX OS
                            LOCAL SERVICE AREA(S)

                        EFFECTIVE:
                                  ----------------------
                                               (mm/dd/yr)

The following table depicts the service area(s) covered by this Appendix:

<TABLE>
<CAPTION>
LSP'S LOCAL SERVICE AREA(S)  EFFECTIVE DATE
<S>                          <C>
- ---------------------------  --------------
- ---------------------------  --------------
- ---------------------------  --------------
- ---------------------------  --------------
- ---------------------------  --------------
</TABLE>


<PAGE>   177

                                                        APPENDIX OS - EXHIBIT II
                                                                     PAGE 1 OF 1


                                  APPENDIX OS
                                    OKLAHOMA
                                   EXHIBIT II
                           PRICING - FCILITIES BASED

                        EFFECTIVE:______________________
                                               (mm/dd/yr)

The following rates will apply for each service element:

<TABLE>
<S>                                                               <C>
A.  FULLY AUTOMATED CALL PROCESSING

This usage rate applies to each call that has been completed
on a fully automated basis.
                            Rate per completed automated call     $   0.179
B.  OPERATOR-ASSISTED CALL PROCESSING

This usage rate applies to each call that has been answered by
or forwarded to an operator.
                                  Rate per actual work second     $   0.021
C.  CALL BRANDING

An initial non-recurring charge applies per TOPS switch,
per brand for the establishment of LSP specified Call
Branding.  An additional non-recurring charge applies
for each subsequent change to the branding
                                   Rate per initial load group    $2,700.00
                                Rate per load for Brand change    $2,700.00
                                                   Per Call(1)    $    0.02

D.  OPERATOR SERVICES RATE/REFERENCE INFORMATION

An initial non-recurring charge applies per TOPS switch,
per rate schedule, for the initial load of LSP's Operator 
Services Rate/Reference Information.  An additional
non-recurring charge applies for each subsequent change 
to Rate/Reference Information.
                                        Rate per initial load     $4,100.00
                              Rate per subsequent rate change     $2,900.00
                         Rate per subsequent reference change     $2,900.00
</TABLE>

__________________
(1)  A per call charge will apply when OS are provided in conjunction with: i)
unbundled local switching or ii) when multiple brands are required on a single
operator services trunk


<PAGE>   178
                                                                    APPENDIX NIM
                                                                     PAGE 2 OF 5


     APPENDIX NETWORK INTERCONNECTION METHODS (NIM)

     This Appendix NIM designates Network Interconnection Methods (NIMs) to be
     used by the Parties.  These include, but are not limited to: MidSpan
     Fiber Interconnection (MSFI); Virtual Collocation Interconnection; SONET
     Based Interconnection; Physical Collocation Interconnection; leasing of
     SWBT facilities; and other methods as mutually agreed to by the Parties.

1.   MID-SPAN FIBER INTERCONNECTION (MSFI)

     Mid-Span Fiber Interconnection (MSFI) between Southwestern Bell Telephone
     (SWBT) and LSP can occur at any mutually agreeable, economically and
     technically feasible point between LSP's premises and a SWBT tandem or
     end office.  This interconnection will be on a point-to-point SONET
     system over single mode fiber optic cable.

     MSFI may be used to provide interconnection trunking as defined in
     Appendix ITR to Attachment 11: Network Interconnection Architecture.
   
A.   There are two basic mid-span interconnection designs:

            1.    Design One: LSP's fiber cable and SWBT's fiber cable are
            connected at an economically and technically feasible point between
            the LSP location and the last entrance manhole at the SWBT central
            office.

                  The Parties may agree to a location with access to an existing
            SWBT fiber termination panel. In these cases, the network
            interconnection point (POI) shall be designated outside of the SWBT
            building, even though the LSP fiber may be physically terminated on
            a fiber termination panel inside of a SWBT building. In this
            instance, LSP will not incur fiber termination charges and SWBT will
            be responsible for connecting the cable to the SWBT facility.

                  The Parties may agree to a location with access to an existing
            LSP fiber termination panel. In these cases, the network
            interconnection point (POI) shall be designated outside of the LSP
            building, even though the SWBT fiber may be physically terminated on
            a fiber termination panel inside of an LSP building. In this
            instance, SWBT will not incur fiber termination charges and LSP will
            be responsible for connecting the cable to the LSP facility.

            If a suitable location with an existing fiber termination panel
            cannot be agreed upon, LSP and SWBT shall mutually determine
            provision of a fiber termination panel housed in an outside, above
            ground, cabinet placed at the physical POI. Ownership and the cost
            of provisioning the panel will be negotiated between the two
            parties.
<PAGE>   179

                                                                    APPENDIX NIM
                                                                     PAGE 3 OF 5


            2.     Design Two:  LSP will provide fiber cable to the last 
            entrance manhole at the SWBT tandem or end office switch with which
            LSP wishes to interconnect. LSP will provide a sufficient length of
            fiber optic cable for SWBT to pull the fiber cable to the SWBT cable
            vault for termination on the SWBT fiber distribution frame (FDF). In
            this case the POI shall be at the manhole location.

                  Each Party is responsible for designing, provisioning,
            ownership and maintenance of all equipment and facilities on its
            side of the POI. Each Party is free to select the manufacturer of
            its Fiber Optic Terminal (FOT). Neither Party will be allowed to
            access the Data Communication Channel (DCC) of the other Party's
            FOT. The Parties will work cooperatively to achieve equipment
            compatibility.

B.   The Parties will mutually agree upon the precise terms of each mid-span
     interconnection facility.  These terms will cover the technical details of
     the interconnection as well as other network interconnection, provisioning
     and maintenance issues.

C.   The LSP location includes FOTs, multiplexing and fiber required to take
     the optical signal handoff from SWBT for interconnection trunking as
     outlined in Appendix ITR.

D.   The fiber connection point may occur at several locations:

            1. a location with an existing SWBT fiber termination panel.  In
            this situation, the POI shall be outside the SWBT building which
            houses the fiber termination panel;

            2. a location with access to an existing LSP fiber termination
            panel.  In these cases, the network interconnection point (POI)
            shall be designated outside of the LSP building, even though the
            SWBT fiber may be physically terminated on a fiber termination
            panel inside a LSP building;

            3. a location with no existing SWBT fiber termination panel.  In
            this situation, SWBT and LSP will negotiate provisioning,
            maintenance and ownership of a fiber termination panel and above
            ground outside cabinet as a POI and for connection of the fiber
            cables;

            4. a manhole outside of the SWBT central office.  In this
            situation, LSP will provide sufficient fiber optic cable for SWBT
            to pull the cable into the SWBT cable vault for termination on the
            SWBT FDF.  The POI will be at the manhole and SWBT will assume
            maintenance responsibility for the fiber cabling from the manhole
            to the FDF.
<PAGE>   180
                                                                    APPENDIX NIM
                                                                     PAGE 4 OF 5

E.    The SWBT tandem or end office switch includes all SWBT FOT, multiplexing
      and fiber required to take the optical signal hand-off provided from LSP
      for interconnection trunking as outlined in Appendix ITR. This location is
      SWBT's responsibility to provision and maintain.

F.    In both designs, LSP and SWBT will mutually agree on the capacity of the
      FOT(s) to be utilized. The capacity will be based on equivalent DS1s that
      contain trunks and interLATA traffic. Each Party will also agree upon the
      optical frequency and wavelength necessary to implement the
      interconnection. The Parties will develop and agree upon methods for the
      capacity planning and management for these facilities, terms and
      conditions for over provisioning facilities, and the necessary processes
      to implement facilities as indicated below. These methods will meet
      quality standards as mutually agreed to by LSP and SWBT.

2.    AVOIDANCE OF OVER PROVISIONING

      Underutilization is the inefficient deployment and use of the network due
      to forecasting a need for more capacity than actual usage requires, and
      results in unnecessary costs for SONET systems.  To avoid over
      provisioning, the Parties will agree to joint facility growth planning as
      detailed below.

3.    JOINT FACILITY GROWTH PLANNING

      The initial fiber optic system deployed for each interconnection shall be
      the smallest standard available.  For SONET this is an OC-3 system.  The
      following list the criteria and processes needed to satisfy additional
      capacity requirements beyond the initial system.

A.    Criteria:

      1. Investment is to be minimized;

      2. Facilities are to be deployed in a "just in time" fashion.

B.    Processes

        1.  discussions to provide relief to existing facilities will be 
        triggered when either Party recognizes that the overall system facility
        (DS1s) is at 90% capacity;

        2.  both Parties will perform a joint validation to ensure current 
        trunks have not been over-provisioned. If any trunk groups are
        over-provisioned, trunks will be turned down as appropriate. If any
        trunk resizing lowers the fill level of the system below 90%, the
        growth planning process will be suspended and will not be reinitiated
        until a 90% fill level is achieved. Trunk design blocking criteria


<PAGE>   181
                                                                    APPENDIX NIM
                                                                     PAGE 5 OF 5

        described in Appendix ITR will be used in determining trunk group
        sizing  requirements and forecasts;

        3. if based on the forecasted equivalent DS1 growth, the existing fiber
        optic system is not projected to exhaust within one year, the Parties
        will suspend further relief planning on this interconnection until a
        date one year prior to the projected exhaust date. If growth patterns
        change during the suspension period, either Party may re-initiate the
        joint planning process;

        4. if the placement of a minimum size FOT will not provide adequate
        augmentation capacity for the joint forecast over a two year period,
        and the forecast appears reasonable based upon history, the next larger
        system  may be deployed. In the case of a SONET system, the OC-3 system
        could be upgraded to an OC-12. If the forecast does not justify a move
        to the next larger system, another minimal size system (such as on
        OC-3) could be placed. This criteria assumes both Parties have adequate
        fibers for either scenario. If adequate fibers do not exist, both
        Parties would negotiate placement of additional fibers;

        5. both Parties will negotiate a project service date and corresponding
        work schedule to construct relief facilities in an effort to achieve
        "just in time" deployment;

        6. the joint planning process/negotiations should be completed within 
        two months of identification of 90% fill.

4.    VIRTUAL COLLOCATION INTERCONNECTION

      The description of Virtual Collocation Interconnection is contained in
      SWBT's Virtual Collocation tariffs (i.e., SWBT's Tariff F.C.C. No. 73).

5.    SONET-BASED INTERCONNECTION

      The description of SONET-Based Interconnection is contained in SWBT's
      Sonet-Based Interconnection tariffs (i.e., SWBT's Tariff F.C.C. No. 73).

6.    PHYSICAL COLLOCATION INTERCONNECTION

      SWBT will provide Physical Collocation Interconnection on
      nondiscriminatory terms and conditions at the time LSP requests such
      interconnection.

7.    LEASING OF SWBT'S FACILITIES

      LSP's leasing of SWBT's facilities for purposes of Attachment 11: Network
      Interconnection Architecture will be subject to the mutual agreement of
      the Parties.
<PAGE>   182
     
     
                         PHYSICAL COLLOCATION AGREEMENT

                                    BETWEEN

                      SOUTHWESTERN BELL TELEPHONE COMPANY

                                      AND

                             DIGITAL TELEPORT, INC.


<PAGE>   183



                               TABLE OF ARTICLES

<TABLE>
<S>                                                                         <C>
ARTICLE I - PREMISES ..................................................      -1-
ARTICLE II - EFFECTIVENESS AND REGULATORY APPROVAL ....................      -2-
ARTICLE III - TERM ....................................................      -3-
ARTICLE IV - PREMISES CHARGES .........................................      -4-
ARTICLE V - INTERCONNECTION CHARGES ...................................      -7-
ARTICLE VI - FIBER OPTIC CABLE AND DEMARCATION POINT ..................      -7-
ARTICLE VII - USE OF PREMISES .........................................      -8-
ARTICLE VIII - STANDARDS ..............................................     -10-
ARTICLE IX - RESPONSIBILITIES OF THE INTERCONNECTOR ...................     -11-
ARTICLE X - QUIET ENJOYMENT ...........................................     -13-
ARTICLE XI - ASSIGNMENT ...............................................     -13-
ARTICLE XII - CASUALTY LOSS ...........................................     -13-
ARTICLE XIII - RE-ENTRY  ..............................................     -14-
ARTICLE XIV - LIMITATION OF LIABILITY .................................     -15-
ARTICLE XV - INDEMNIFICATION OF SWBT ..................................     -16-
ARTICLE XVI - SERVICES, UTILITIES, MAINTENANCE AND FACILITIES .........     -17-
ARTICLE XVII - LIMITATION OF ACTIONS; DISPUTE RESOLUTION ..............     -17-
ARTICLE XVIII - SUCCESSORS BOUND ......................................     -19-
ARTICLE XIX - CONFLICT OF INTEREST ....................................     -19-
ARTICLE XX - NON-EXCLUSIVE REMEDIES ...................................     -20-
ARTICLE XXI - NOTICES .................................................     -20-
ARTICLE XXII - COMPLIANCE WITH LAWS ...................................     -20-
ARTICLE XXIII - OSHA STATEMENT ........................................     -21-
ARTICLE XXIV - INSURANCE ..............................................     -21-
ARTICLE XXV - SWBT'S RIGHT OF ACCESS ..................................     -24-
ARTICLE XXVI - PURPOSE AND SCOPE OF AGREEMENT .........................     -24-
</TABLE>


<PAGE>   184

<TABLE>
<S>                                                                        <C>
ARTICLE XXVII - MISCELLANEOUS .........................................     -25-
</TABLE>


<PAGE>   185


                         PHYSICAL COLLOCATION AGREEMENT

     THIS PHYSICAL COLLOCATION AGREEMENT ("Agreement") is made this
_____________ day of ____________________, 19__ by and between SOUTHWESTERN
BELL TELEPHONE COMPANY, a Missouri corporation ("SWBT"), and Digital Teleport,
Inc., a [STATE OF INCORPORATION] corporation ("Interconnector").

                                   WITNESSETH

     WHEREAS, SWBT is an incumbent local exchange carrier having a statutory
duty to provide for "physical collocation" of "equipment necessary for
interconnection or access to unbundled network elements" at its premises, 47
U.S.C. 251(c)(6);

     WHEREAS, the Interconnector wishes to physically locate certain of its
equipment within the Premises (as defined herein) and connect with SWBT;

     NOW THEREFORE, in consideration of the mutual agreements and covenants
contained herein and other good and valuable consideration, the receipt and
sufficiency of which is hereby acknowledged, SWBT and the Interconnector (the
"parties") agree as follows:

                              ARTICLE I - PREMISES

     1.1 Right to Use.  Subject to this Agreement, SWBT grants to
Interconnector the right to use the premises described on Exhibit __
("Premises"), attached and incorporated herein, within real property at
___________ in the City of ______________, County of _________________, State of
_________________.

      1.2 Relocation. Notwithstanding Section 1.1, in the event that SWBT
determines it necessary for the Premises to be moved within the building in
which the Premises is located ("Building") or to another SWBT wire center, the
Interconnector is required to do so. In such an event, the Interconnector shall
be responsible for the preparation of the new premises at the new location if
such relocation arises from circumstances beyond the reasonable control of SWBT,
including condemnation
<PAGE>   186


                                      -2-


or government order or regulation that makes the continued occupancy of the
Premises or Building uneconomical in SWBT's sole judgment. Otherwise SWBT shall
be responsible for any such preparation.

     In the event that the Interconnector requests that the Premises be moved
within the Building or to another SWBT wire center, SWBT shall permit the
Interconnector to relocate the Premises, subject to the availability of space
and associated requirements.  The Interconnector shall be responsible for all
applicable charges associated with the move, including the reinstallation of
its equipment and facilities and the preparation of the new Premises and the
new wire center as applicable.

     In either such event, the new premises shall be deemed the "Premises"
hereunder and the new wire center the "Building."

     1.3 The Premises.  SWBT agrees, at the Interconnector's sole cost and
expense as set forth herein, to prepare the Premises in accordance with working
drawings and specifications entitled ______________ and dated ______________,
which documents, marked Exhibit __, are attached and incorporated herein.  The
preparation shall be arranged by SWBT in compliance with all applicable codes,
ordinances, resolutions, regulations and laws.  After the Interconnector has
made the initial payments required by Section 4.4 and the state regulatory
approval is obtained in accordance with Section 2.1 hereof, SWBT agrees to
pursue diligently the preparation of the Premises for use by the
Interconnector.

               ARTICLE II - EFFECTIVENESS AND REGULATORY APPROVAL

     2.1 Submission to State Commission.  The effectiveness of this Agreement
is conditioned upon the unqualified approval of this Agreement, whether as a
result of an approval process or by operation of law, under 47 U.S.C.
252(a)(1).  After execution of this Agreement, the parties shall submit it to
the State commission for the State in which the Premises is located as thereby
required for approval, and shall defend the Agreement and support any
reasonable effort to have this Agreement so approved,

<PAGE>   187

                                      -3-

including the supplying of witnesses and testimony if a hearing is to be held.

     2.2 Failure to Receive Approval.  In the event that this Agreement does
not receive such unqualified approval, this Agreement shall be void upon
written notice of either party to the other after such regulatory action
becomes final and unappealable.  Thereafter Interconnector may request to begin
negotiations again under 47 U.S.C. 251.  Alternatively, the parties may both
agree to modify this Agreement to receive such approval, but neither shall be
required to agree to any modification.  Any agreement to modify shall not waive
the right of either party to pursue any appeal of the ruling made by any
reviewing regulatory commission.

     2.3 Preparation Prior to Regulatory Approval.  At the written election of
the Interconnector, SWBT shall begin preparing the Premises for the
Interconnector prior to receiving the approval required by Section 2.1 hereof.
The sole evidence of such election shall be the payment to SWBT of the initial
payments specified in Sections 4.4. Payment to SWBT of the remaining charges
under these Sections shall be due upon completion. Upon such an election, this
Agreement shall become effective but only insofar as to be applicable to the
Premises preparation. In the event that the Agreement does not become fully
effective as contemplated by this Article, the Interconnector shall not be
entitled to any refund or return of any such payments beyond any portion of the
charges paid but not attributable to costs incurred by SWBT. To the extent that
SWBT has incurred preparation costs not included within any payment made by the
Interconnector, the Interconnector shall pay those costs within thirty (30) days
of notice by SWBT.

                               ARTICLE III - TERM

     3.1 Commencement Date.  This Agreement shall be month-to-month, beginning
on the "Commencement Date." The "Commencement Date" shall be the first day
after this Agreement becomes effective in accordance with Article II hereof.

     3.2 Occupancy.  Unless there are unusual circumstances, SWBT will notify
the Interconnector
<PAGE>   188

                                      -4-

that the Premises is ready for occupancy within ____ days after receipt of the
payments due under Sections 4.4. The Interconnector must place operational
telecommunications equipment in the Premises and connect with SWBT's network
within sixty (60) days after receipt of such notice; provided, however, that
such 60-day period shall not begin until regulatory approval is obtained under
Article II. If the Interconnector fails to do so, this Agreement is terminated
except that the Interconnector shall be liable in an amount equal to the unpaid
balance of the charges due under and, further, shall continue to be bound by
Articles II, IV, XI, XIV, XV, XVII, XVIII, XX, XXI, XXVI and XXVII hereof. For
purposes of this Section, the Interconnector's telecommunications equipment is
considered to be operational and interconnected when connected to SWBT's network
for the purpose of providing service.

                         ARTICLE IV - PREMISES CHARGES

     4.1 Monthly Charges.  Beginning on the Commencement Date, Interconnector
shall pay to SWBT a charge of ______ Dollars ($___) per month for use of the
Premises.  The monthly charge may be increased upon thirty (30) days' notice by
SWBT.

     4.2 Billing.  Billing shall occur on or about the 25th day of each month,
with payment due thirty (30) days from the bill date.  SWBT may change its
billing date practices upon thirty (30) days notice to the Interconnector.

     4.3 Preparation Charge.  (a) The one-time charge for preparing the
Premises for use by the Interconnector is estimated to be ___________ Dollars
($XXX.XX) ("Preparation Charge"), which consists of two components:  (i) the
charge to the Interconnector associated with modifying the Building to provide
physical collocation ("Common Charge"), and (ii) the charge associated with
preparing the Premises ("Premises Charge").  Of the Preparation Charge
___________ Dollars ($XXX.XX) is the estimate for subcontractor charges
("Subcontractor Charges").

     (b) SWBT will contract for and perform the construction and preparation
activities underlying the

<PAGE>   189
                                      -5-

Preparation Charge, including the Common Charge, the Premises Charge, and the
Subcontractor Charges, and any Custom Work charges, using same or consistent
practices that are used by SWBT for other construction and preparation work
performed in the Building. Subject to an appropriate nondisclosure agreement,
SWBT will permit the Interconnector to inspect supporting documents for the
Preparation Charge, including the Common Charge (if the Interconnector is the
initial physical collocator as used in Section 4.5(b)) and the Premises
Charge, and any Custom Work charge.  Any dispute regarding such SWBT charges
will be subject to the dispute resolution provisions hereof.

     4.4 Payment of Premises Charge.  Prior to any obligation on SWBT to start
any preparation of the Premises, the Interconnector shall pay SWBT fifty
percent (50%) of the Premises Charge and eighty-five percent (85%) of any
custom work charge required to create or vacate any entrance facility for the
Interconnector ("Custom Work"), and shall be due no later than ten (10)
business days after the Agreement has become effective in accordance with
Article II hereof.  The remainder of the Premises Charge and any Custom Work
charge are due upon completion and prior to occupancy by the Interconnector.

     4.5 Payment of Common Charge.  (a) In addition and prior to any obligation
on SWBT to start any preparation of the Building for physical collocation, the
Interconnector shall pay SWBT fifty percent (50%) of the Common Charge.  The
other fifty percent (50%) of the Common Charge is due upon completion and prior
to occupancy by the Interconnector.

     (b) The first entity to which SWBT provides physical collocation in the
Building shall be responsible for all costs incurred by SWBT associated with
the preparation of the Building to provide physical collocation in the initial
space where physical collocation is to be located ("Initial Common Charge").
Thereafter the Initial Common Charge will be prorated and the prorated share
refunded to the previous physical collocator(s) as additional entities use
physical collocation in the Building within twelve (12) months of the first
billing date of the initial monthly charge for the first physical collocator in
the Building, using the following schedule:


<PAGE>   190

                                      -6-

<TABLE>
<CAPTION>
                 Collocator     Initial Common Charge     Refund
                --------------  ---------------------  ---------
                <S>             <C>                    <C>
                1st                 100%                    NA
                2nd                  50%                    50%
                3rd              33 1/3%                16 2/3%
                4th                  25%                 8 1/3%
                5th and beyond        0%                     0%
</TABLE>

To the extent that a physical collocator uses a space other than such initial
space, SWBT shall refund to the Interconnector the portion of the Initial
Common Charge applicable to such collocator based on the relative use of such
initial space in a manner consistent with the above methodology and other terms
of this Agreement.

     (c) No interest will be paid on refunds.  Refunds shall be based on the
Initial Common Charge actually paid by the first physical collocator.

     (d) Notwithstanding the above, SWBT shall have no obligation to remit any
amount that would result in SWBT being unable to retain the full amount of the
Initial Common Charge or to remit any amount based upon charges not actually
collected.

     4.6 Payment of Preparation Charge.  SWBT is not obligated to start any
preparation of the Premises until the Interconnector pays SWBT fifty percent
(50%) of the Preparation Charge and eighty-five percent (85%) of the charges
for any Custom Work charge.  Such charges shall be due no later than ten (10)
business days after the Agreement has become effective in accordance with
Article II hereof.  The remainder of the Preparation Charge and any Custom Work
charge are due upon completion and prior to occupancy by the Interconnector.

     4.7 Occupancy Conditioned on Payment.  SWBT shall not permit the
Interconnector to have access to the Premises for any purpose other than
inspection until SWBT is in receipt of complete payment of the Preparation
Charge and any Custom Work charges.

     4.8 Subcontractor Charges.  Within one hundred twenty (120) days of the
completion date of the Premises, SWBT shall perform a true-up of all
Subcontractor Charges using the actual amounts billed 


<PAGE>   191
                                      -7-

by subcontractors. Any amounts incurred above the Subcontractor Charges will be
billed to the Interconnector or, alternatively, any amount below such Charges
will be remitted to the Interconnector.

     4.9 Breach Prior to Commencement Date.  In the event that the
Interconnector materially breaches this Agreement by purporting to terminate
this Agreement after SWBT has begun preparation of the Premises but before SWBT
has been paid the entire amounts due under this Article, then in addition to
any other remedies that SWBT might have, the Interconnector shall be liable in
the amount equal to the non-recoverable costs less estimated net salvage.
Non-recoverable costs include the non-recoverable cost of equipment and
material ordered, provided or used; trued-up Subcontractor Charges, the
non-recoverable cost of installation and removal, including the costs of
equipment and material ordered, provided or used; labor; transportation and any
other associated costs.

     4.10 Late Payment Charge.  In the event that any charge is not paid when
due, the unpaid amounts shall bear interest in accordance with the terms and
conditions set forth in SWBT's intrastate tariff late payment provision(s)
applicable to access services for the State in which the Premises is located,
or the highest rate permitted by law, whichever is lower, from the due date
until paid.

                      ARTICLE V - INTERCONNECTION CHARGES

     5.1 Charges for interconnection shall be as set forth in any
interconnection agreement between SWBT and the interconnector and any
applicable tariffs.

              ARTICLE VI - FIBER OPTIC CABLE AND DEMARCATION POINT

     6.1 Fiber Entrances.  The Interconnector shall use a single mode
dielectric fiber optic cable as a transmission medium to the Premises.  The
Interconnector shall be permitted no more than two (2) entrance routes into the
Building, if available.

     6.2 Demarcation Point.  SWBT shall designate the point(s) of termination
within the Building as the point(s) of physical demarcation between the
Interconnector's network and SWBT's network, with


<PAGE>   192
                                      -8-

each being responsible for maintenance and other ownership obligations and
responsibilities on its side of that demarcation point. SWBT anticipates that
the demarcation point will be within the point-of-termination frame.

                         ARTICLE VII - USE OF PREMISES

     7.1 Nature of Use.  The Premises are to be used by the Interconnector for
purposes of locating equipment and facilities within SWBT's central offices
connect with SWBT services only.  Consistent with the nature of the Building
and the environment of the Premises, the Interconnector shall not use the
Premises for office, retail, or sales purposes.  No signage or markings of any
kind by the Interconnector shall be permitted on the Building or on the grounds
surrounding the Building.

     7.2 Equipment List.  A list of all of the Interconnector's equipment and
facilities that will be placed within the Premises is set forth on Exhibit __,
attached and incorporated herein, with the associated power requirements, floor
loading, and heat release of each piece.  The Interconnector warrants and
represents that Exhibit __ is a complete and accurate list, and acknowledges
that any incompleteness or inaccuracy would be a material breach of this
Agreement.  The Interconnector shall not place or leave any equipment or
facilities within the Premises beyond those listed on Exhibit __ without the
express written consent of SWBT.

     7.2.1 Subsequent Requests to Place Equipment.  In the event that
subsequent to the execution of this Agreement the Interconnector desires to
place in the Premises any equipment or facilities not set forth on Exhibit __,
the Interconnector shall furnish to SWBT a written list and description thereof
substantially in the form of Attachment A, which is attached and incorporated.
Thereafter, in its sole discretion, SWBT may provide such written consent or
may condition any such consent on additional charges arising from the request,
including any engineering design charges and any additional requirements such
as power and environmental requirements for such listed and described equipment
and/or facilities.  Upon the execution by both parties of a final list and
description, including any

<PAGE>   193
                                      -9-

applicable charges, this Agreement shall be deemed to have been amended to
include the terms and conditions of the final list and description.

     7.2.2 Limitations.  The foregoing imposes no obligation upon SWBT to
purchase additional plant or equipment, relinquish used or forecasted space or
facilities, or to undertake the construction of new quarters or to construct
additions to existing quarters in order to satisfy a subsequent request for
additional space or the placement of additional equipment or facilities.

     7.3 Administrative Uses.  The Interconnector may use the Premises for
placement of equipment and facilities only. The Interconnector's employees,
agents and contractors shall be permitted access to the Premises at all
reasonable times, provided that the Interconnector's employees, agents and
contractors comply with SWBT's policies and practices pertaining to fire, safety
and security. The Interconnector agrees to comply promptly with all laws,
ordinances and regulations affecting the use of the Premises. Upon the
expiration of the Agreement, the Interconnector shall surrender the Premises to
SWBT, in the same condition as when first occupied by the Interconnector,
ordinary wear and tear excepted.

     7.4 Threat to Network or Facilities.  Interconnector equipment or
operating practices representing a significant demonstrable technical threat to
SWBT's network or facilities, including the Building, are strictly prohibited.

     7.5 Interference or Impairment.  Notwithstanding any other provision
hereof, the characteristics and methods of operation of any equipment or
facilities placed in the Premises shall not interfere with or impair service
over any facilities of SWBT or the facilities of any other person or entity
located in the Building; create hazards for or cause damage to those
facilities, the Premises, or the Building; impair the privacy of any
communications carried in, from, or through the Building; or create hazards or
cause physical harm to any individual or the public.  Any of the foregoing
events would be a material breach of this Agreement.



<PAGE>   194
                                      -10-

     7.6 Interconnection to Other Collocated Interconnectors Within the
Building To the extent that SWBT is required by law to permit such
interconnection, SWBT will provide the connection between physical collocation
arrangements on a time and materials basis whenever the collocated
interconnectors cannot for technical reasons provide the connection for
themselves by passing the facility through the cage wall(s). SWBT will provide
nothing more than the labor and physical structure(s) necessary for the
collocator(s) to pull facilities provided by one collocator from its cage to the
cage of another collocator. If the collocators are not located on the same floor
and cannot physically pull the cable themselves through the SWBT provided
structure(s), SWBT will perform the cable pull on an time and materials basis.
At no time will the collocators be allowed access to any portion of the central
office other than the collocation area. SWBT will not make the physical
connection within the collocator's cage, SWBT will not accept any liability for
the cable or the connections and SWBT will not maintain any records concerning
these connections.

     7.7 Personality and its Removal.  Subject to this Article, the
Interconnector may place or install in or on the Premises such fixtures and
equipment as it shall deem desirable for the conduct of business.  Personal
property, fixtures and equipment placed by the Interconnector in the Premises
shall not become a part of the Premises, even if nailed, screwed or otherwise
fastened to the Premises, but shall retain their status as personality and may
be removed by Interconnector at any time.  Any damage caused to the Premises by
the removal of such property shall be promptly repaired by Interconnector at
its expense.

     7.8 Alterations.  In no case shall the Interconnector or any person
purporting to be acting through or on behalf of the Interconnector make any
rearrangement, modification, improvement, addition, repair, or other alteration
to the Premises or the Building without the advance written permission and
direction of SWBT.  SWBT shall consider a modification, improvement, addition,
repair, or other alteration requested by the Interconnector, provided that SWBT
shall have the right to reject or modify


<PAGE>   195
                                      -11-

any such request. The cost of any such construction shall be paid by
Interconnector in accordance with SWBT's then-standard custom work order
process.

                            ARTICLE VIII - STANDARDS

     8.1 Minimum Standards.  This Agreement and the physical collocation
provided hereunder is made available subject to and in accordance with the (i)
Bellcore Network Equipment Building System (NEBS) Generic Requirements
(GR-63-CORE and GR-1089-CORE), as may be amended at any time and from time to
time, and any successor documents; (ii) SWBT's Technical Publication for
Physical Collocation dated _____, 1996, as may be amended from time to time;
(iii) SWBT's Technical Publication 76300, Installation Guide, followed in
installing network equipment and facilities within SWBT central offices, as may
be amended from time to time; (iv) SWBT's Emergency Operating Procedures, as may
be amended from time to time; and (v) any statutory and/or regulatory
requirements in effect at the execution of this Agreement or that subsequently
become effective and then when effective. The Interconnector shall strictly
observe and abide by each.

     8.2 Revisions.  Any revision to SWBT's Technical Publication for Physical
Collocation, its Technical Publication 76300, or its Emergency Operating
Procedures shall become effective and thereafter applicable under this
Agreement thirty (30) days after such revision is released by SWBT; provided,
however, that any revision made to address situations potentially harmful to
SWBT's network or the Premises, or to comply with statutory and/or regulatory
requirements shall become effective immediately.

     8.3 Compliance Certification.  The Interconnector warrants and represents
compliance with the Bellcore Network Equipment Building System (NEBS) Generic
Requirements (GR-63-CORE and GR-1089-CORE) for each item set forth on Exhibit
___.  The Interconnector also warrants and represents that any equipment or
facilities that may be placed in the Premises pursuant to Section 7.2.1 or
otherwise shall be so compliant.  DISCLOSURE OF ANY NON-COMPLIANT ITEM ON


<PAGE>   196
                                      -12-


EXHIBIT __, PURSUANT TO SECTION 7.2.1, OR OTHERWISE SHALL NOT QUALIFY THIS
ABSOLUTE CERTIFICATION IN ANY MANNER.

              ARTICLE IX - RESPONSIBILITIES OF THE INTERCONNECTOR

     9.1 Contact Number.  The Interconnector is responsible for providing to
SWBT personnel a contact number for Interconnector technical personnel who are
readily accessible 24 hours a day, 7 days a week.

     9.2 Trouble Status Reports.  The Interconnector is responsible for
providing trouble report status when requested by SWBT.

     9.3 Optical Fiber Extension.  The Interconnector is responsible for
bringing its fiber optic cable to the wire center entrance manhole(s)
designated by SWBT, and for leaving sufficient cable length in order for SWBT
to fully extend the Interconnector-provided cable through the cable vault to
the Premises.

     9.4 Regeneration.  Regeneration of either DS1 or DS3 signal levels may be
provided by the Interconnector, or SWBT under its then-standard custom work
order process, including payment requirements prior to the installation of the
regeneration equipment.

     9.5 Removal.  The Interconnector is responsible for removing any
equipment, property or other items that it brings into the Premises or any other
part of the Building. If the Interconnector fails to remove any equipment,
property, or other items from the Premises within thirty (30) days after
discontinuance of use, SWBT may perform the removal and shall charge the
Interconnector for any materials used in any such removal, and the time spent on
such removal at the then-applicable hourly rate for custom work. Further, in
addition to the other provisions herein, the Interconnector shall indemnify and
hold SWBT harmless from any and all claims, expenses, fees, or other costs
associated with any such removal by SWBT.


<PAGE>   197
                                      -13-


     9.6 Interconnector's Equipment and Facilities.  The Interconnector is
solely responsible for the design, engineering, testing, performance, and
maintenance of the equipment and facilities used by the Interconnector in the
Premises.  The Interconnector will be responsible for servicing, supplying,
repairing, installing and maintaining the following facilities within the
Premises:

     (a) its fiber optic cable(s);

     (b) its equipment;

     (c) required point of termination cross connects;

     (d) point of termination maintenance, including replacement of fuses and
circuit breaker restoration, if and as required; and

     (e) the connection cable and associated equipment which may be required
within the Premises to the point(s) of termination.

SWBT NEITHER ACCEPTS NOR ASSUMES ANY RESPONSIBILITY WHATSOEVER IN ANY OF THESE
AREAS.

     9.7 Verbal Notifications Required.  The Interconnector is responsible for
immediate verbal notification to SWBT of significant outages or operations
problems which could impact or degrade SWBT's network, switches, or services,
and for providing an estimated clearing time for restoral.  In addition,
written notification must be provided within twenty-four (24) hours.

     9.8 Service Coordination.  The Interconnector is responsible for
coordinating with SWBT to ensure that services are installed in accordance with
the service request.

     9.9 Testing.  The Interconnector is responsible for testing, to identify
and clear a trouble when the trouble has been isolated to an
Interconnector-provided facility or piece of equipment.  If SWBT testing is
also required, it will be provided at charges specified in SWBT's F.C.C. No.
73, Section 13.

                           ARTICLE X- QUIET ENJOYMENT

     Subject to the other provisions hereof, SWBT covenants that it has full
right and authority to 

<PAGE>   198
                                      -14-

permit the use of the Premises by the Interconnector and that, so long as the
Interconnector performs all of its obligations herein, the Interconnector may
peaceably and quietly enjoy the Premises during the term hereof.

                            ARTICLE XI - ASSIGNMENT

     The Interconnector shall not assign or otherwise transfer this Agreement,
neither in whole nor in part, or permit the use of any part of the Premises by
any other person or entity, without the prior written consent of SWBT.  Any
purported assignment or transfer made without such consent shall be voidable at
the option of SWBT.  The Interconnector shall not permit any third party to
jointly occupy the Premises.

                          ARTICLE XII - CASUALTY LOSS

     12.1 Damage to Premises.  If the Premises are damaged by fire or other
casualty, and

      (i)  The Premises are not rendered untenantable in whole or in
           part, SWBT shall repair the same at its expense (as hereafter
           limited) and the rent shall not be abated, or

      (ii) The Premises are rendered untenantable in whole or in part
           and such damage or destruction can be repaired within ninety (90)
           days, SWBT has the option to repair the Premises at its expense (as
           hereafter limited) and rent shall be proportionately abated while
           Interconnector was deprived of the use.  If the Premises cannot be
           repaired within ninety (90) days, or SWBT opts not to rebuild, then
           this Agreement shall (upon notice to the Interconnector within
           thirty (30) days following such occurrence) terminate as of the date
           of such damage.

Any obligation on the part of SWBT to repair the Premises shall be limited to
repairing, restoring and rebuilding the Premises as originally prepared for the
Interconnector and shall not include any obligation to repair, restore, rebuild
or replace any alterations or improvements made by the 

<PAGE>   199
                                      -15-

Interconnector or by SWBT on request of the Interconnector; or any fixture or
other equipment installed in the Premises by the Interconnector or by SWBT on
request of the Interconnector.

     12.2. Damage to Building.  In the event that the Building shall be so
damaged by fire or other casualty that closing, demolition or substantial
alteration or reconstruction thereof shall, in SWBT's opinion, be advisable,
then, notwithstanding that the Premises may be unaffected thereby, SWBT, at its
option, may terminate this Agreement by giving the Interconnector ten (10) days
prior written notice within thirty (30) days following the date of such
occurrence, if at all possible.

                            ARTICLE XIII - RE-ENTRY

     If the Interconnector shall default in performance of any agreement
herein, and the default shall continue for thirty (30) days after receipt of
written notice, or if the Interconnector is declared bankrupt or insolvent or
makes an assignment for the benefit of creditors, SWBT may, immediately or at
any time thereafter, without notice or demand, enter and repossess the
Premises, expel the Interconnector and any claiming under the Interconnector,
remove the Interconnector's property, forcibly if necessary, and thereupon this
Agreement shall terminate, without prejudice to any other remedies SWBT might
have.

     SWBT may also refuse additional applications for service and/or refuse to
complete any pending orders for additional space or service by the
Interconnector at any time thereafter.

                     ARTICLE XIV - LIMITATION OF LIABILITY

     14.1 Limitation.  With respect to any claim or suit for damages arising in
connection with the mistakes, omissions, interruptions, delays or errors, or
defects in transmission occurring in the course of furnishing service hereunder,
the liability of SWBT, if any, shall not exceed an amount equivalent to the
proportionate monthly charge to the Interconnector for the period during which
such mistake, omission, interruption, delay, error, or defect in transmission or
service occurs and continues. 
<PAGE>   200
                                     -16-

However, any such mistakes, omissions,  interruptions, delays, errors, or
defects in transmission or service which are caused or contributed to by the
negligence or willful act of the Interconnector or which arise in connection
with the use of the Interconnector-provided facilities or equipment shall not
result in the imposition of any liability whatsoever upon SWBT.

     Neither party shall be responsible to the other for any indirect, special,
consequential, lost profit, or punitive damages, whether in contract or tort.

     Each party shall be indemnified and held harmless by the other against
claims and damages by any third party arising from provision of the other
party's services or equipment except those claims and damages directly
associated with the provision of services to the other party which are governed
by the provisioning party's applicable tariffs.

     Neither party shall have any liability whatsoever to the customers of the
other party for claims arising from the provision of the other party's service
to its customers, including claims for interruption of service, quality of
service or billing disputes.

     The liability of either party for its willful misconduct, if any, is not
limited by this Agreement.  With respect to any other claim or suit, by a
customer or by any others, for damages associated with the installation,
provision, preemption, termination, maintenance, repair or restoration of
service, SWBT's liability, if any, shall not exceed an amount equal to the
proportionate monthly charge for the affected period.

     SWBT shall not be liable for any act or omission of any other carrier or
customer providing a portion of a service, nor shall SWBT for its own act or
omission hold liable any other carrier or customer providing a portion of a
service.

     When the Interconnector is provided service under this Agreement, SWBT
shall be indemnified, defended and held harmless by the Interconnector against
any claim, loss or damage arising from the customer's use of services offered
under this Agreement, involving:

      (1)  Claims for libel, slander, invasion of privacy, or
           infringement of copyright arising from the

                              
<PAGE>   201
          (j)  Applicant and persons acting on Applicant's behalf are encouraged
               to report unsafe conditions on, within, or in the vicinity of
               SWBT's poles or conduit system to SWBT.

          (k)  Applicant shall establish sufficient controls and safeguards to
               assure compliance with all provisions of this section.

     6.10 Specific Requirements Relating to Personnel, Equipment, Materials, and
Construction Practices Within or in the Vicinity of SWBT's Conduit Systems. When
Applicant, its contractors, and other persons acting on Applicant's behalf
perform work for Applicant within or in the vicinity of SWBT's ducts, conduits,
and rights-of-way where such ducts or conduits are located, they will be guided
by the following:

          (a)  Except as may be mutually agreed upon by the parties in writing,
               Applicant shall not "rod" or clear any duct or inner duct in
               SWBT's conduit system other than a duct or inner duct assigned to
               Applicant. Following the assignment of a specific duct or inner
               duct to Applicant, Applicant may request that SWBT rod or clear
               the duct or inner duct. If the duct or inner duct cannot be
               cleared, SWBT will assign the next available duct or inner duct
               to Applicant. Applicant's request for assignment of the next
               available duct shall be in writing, may be transmitted to SWBT
               via fax or other transmission media mutually agreed upon by the
               parties, and shall be processed within the same intervals
               applicable to the processing of similar requests by SWBT's own
               personnel.

          (b)  Personnel performing work within SWBT's conduit system on either
               party's behalf shall not climb on, step on, or otherwise disturb
               the cables, air pipes, equipment, or other facilities located in
               any manhole or other part of SWBT's conduit system.

          (c)  Personnel performing work within or in the vicinity of SWBT's
               conduit system (including any manhole) on either party's behalf
               shall, upon completing their work, make reasonable efforts to
               remove all tools, unused materials, wire clippings, cable
               sheathing and other materials brought by them to the work site.

          (d)  All of Applicant's facilities shall be firmly secured and
               supported in accordance with Bellcore and industry standards and
               any applicable construction standards adopted by SWBT and
               applicable to SWBT's own facilities.




                                    PAGE 28
<PAGE>   202

          (e)  Applicant's facilities shall be plainly identified with
               Applicant's name in each manhole with a firmly affixed permanent
               tag that meets the identification standards set by SWBT for its
               own facilities.

          (f)  Manhole pumping and purging required in order to allow
               Applicant's work operations to proceed shall be performed by
               Applicant or its contractor in accordance with the requirements
               of Sections 6.14 and 6.15 of this Agreement.

          (g)  Planks or other types of platforms shall be supported only by
               cable racks.

          (h)  Any leak detection liquid or device used by Applicant or
               personnel performing work on Applicant's behalf within or in the
               vicinity of SWBT's conduit system shall be of a type approved by
               SWBT and included on SWBT's then-current list of approved types
               of leak-detection liquids and devices; provided, however, that
               Applicant may use any type of leak detection liquid or device
               which meets Bellcore's published standards if SWBT has not
               provided Applicant SWBT's list of approved types of leak
               detection liquids or devices at least 60 days in advance of
               Applicant's work.

          (i)  Applicant and its contractors shall be responsible for providing
               proper ventilation while work is being performed in SWBT's
               conduit system on Applicant's behalf. Except for protective
               screens, no temporary cover shall be placed over an open manhole
               unless it is at least four feet above the surface level of the
               manhole opening.

          (j)  Smoking or the use of any open flame is prohibited in manholes,
               in any other portion of the conduit system, or within 10 feet of
               any open manhole entrance.

          (k)  Artificial lighting, when required by Applicant, will be provided
               by Applicant. Only explosion-proof lighting fixtures shall be
               used.

          (l)  Neither Applicant nor personnel performing work on Applicant's
               behalf shall allow any combustible gas, vapor, liquid, or
               material to accumulate in SWBT's conduit system (including any
               manhole) during work operations performed within or in the
               vicinity of SWBT's conduit system.

          (m)  Applicant shall comply with the standards set by SWBT for its own
               personnel restricting the use of spark producing tools,
               equipment, and devices (including but not limited to such tools
               as electric drills and hammers, meggers, breakdown sets,
               induction sets, and the like) in 



                                    PAGE 29
<PAGE>   203

               manholes and other portions of SWBT's conduit system, provided
               that such standards have been communicated in writing to
               Applicant at least 60 days in advance of the construction,
               installation, or placement of Applicant's facilities within
               SWBT's conduit system.

          (n)  Cable lubricants used in conduit systems shall be of a type or
               types approved by SWBT and included on SWBT's then-current list
               of approved types of cable lubricants; provided, however, that
               Applicant may use any type of cable lubricant which meets
               Bellcore's published standards if SWBT has not provided Applicant
               SWBT's list of approved types of cable lubricants at least 60
               days in advance of Applicant's work.

     6.11 Opening of Manholes and Access to Conduit. The following requirements
apply to the opening of SWBT's manholes and access to SWBT's conduit system.

          (a)  Applicant will notify SWBT not less than 48 hours in advance
               before entering SWBT's conduit system to perform non-emergency
               work operations. Such operations shall be conducted during normal
               business hours except as otherwise agreed by the parties. The
               notice shall state the general nature of the work to be
               performed. As a courtesy, Applicant shall, when feasible, provide
               SWBT with 10 working days advance notice before entering SWBT's
               conduit system. SWBT shall, within 10 working days after the
               effective date of this Agreement, advise Applicant of the manner
               in which notices required by this section shall be given.

          (b)  An authorized employee or representative of SWBT may be present
               as a construction inspector at any time when Applicant or
               personnel acting on Applicant's behalf enter or perform work
               within SWBT's conduit system. Such inspectors may inspect the
               performance and quality of the work and monitor the work for
               compliance with the terms, conditions, and specifications of this
               Agreement or, in the case of facilities modification, capacity
               expansion or make-ready work, the plans and specifications of the
               facilities modification, capacity expansion, or make-ready
               project. When SWBT inspectors are present, Applicant and its
               contractors shall have sole authority, responsibility, and
               control over the method or manner by which the work is to be
               performed. SWBT's inspectors may call violations to Applicant's
               attention but shall have no authority to direct or advise
               Applicant or personnel acting on Applicant's behalf concerning
               the method or manner by which the work is to be performed;
               provided, however, that nothing contained in this subsection
               shall relieve Applicant from complying with any requirements of
               this Agreement.



                                    PAGE 30
<PAGE>   204

          (c)  The parties contemplate that Applicant may need to perform
               operations in SWBT's conduit system other than during normal
               business hours and may on occasion require access to manholes on
               shorter notice than contemplated in subsection (a) above. Under
               these circumstances, Applicant shall notify SWBT as soon as is
               reasonably possible of its intent to enter and perform work in
               the conduit system and SWBT shall not, without due cause and
               justification, insist on literal compliance with scheduling
               requirements of subsection (a). SWBT will establish procedures
               enabling SWBT to receive notices from Applicant under this
               subsection 24 hours a day, seven days a week.

          (d)  Each party must obtain any necessary authorization from
               appropriate authorities to open manholes for such party's own
               conduit work and operations therein.

          (e)  Applicant shall reimburse SWBT for costs associated with the
               presence of construction inspectors only as specified in APPENDIX
               I and only as permitted by applicable laws, rules, regulations,
               and commission orders. SWBT shall not charge Applicant for more
               than one such construction inspector per site at any given time.

          (f)  If the presence of SWBT personnel at the site is requested by
               Applicant or, in Applicant's opinion, is integral to successful
               completion of the work, Applicant shall pay the costs of having
               such personnel present.

     6.12 OSHA Compliance. The parties agree that:

          (a)  facilities attached to SWBT's poles or placed in SWBT's ducts,
               conduits, and rights-of-way shall be constructed, placed,
               maintained, repaired, and removed in accordance with the
               Occupational Safety and Health Act (OSHA) and all rules and
               regulations promulgated thereunder;

          (b)  all persons acting on such party's behalf shall, when working on,
               within, or in the vicinity of SWBT's poles, ducts, conduits, or
               rights-of-way, comply with OSHA and all rules and regulations
               thereunder; and

          (c)  Applicant shall establish appropriate procedures and controls to
               assure compliance with all requirements of this section.

     6.13 Hazardous Substances. Applicant acknowledges that, from time to time,
hazardous substances (as defined in Section 3.19 of this Agreement) may enter
SWBT's conduit system and accumulate in manholes or other conduit facilities and
that hazardous substances may be present at other sites where SWBT's poles,
ducts, conduits, or rights-of-way are located.


                                    PAGE 31
<PAGE>   205

          (a)  Applicant may, at its expense, perform such inspections and tests
               at the site of any pole, duct, conduit, or right-of-way occupied
               by or assigned to Applicant as Applicant may deem necessary to
               determine the presence at such sites of hazardous substances.
               SWBT will assist Applicant, at Applicant's request and expense,
               in the performance of such inspections and tests.

          (b)  SWBT makes no representations to Applicant or personnel
               performing work on Applicant's behalf that SWBT's poles, ducts,
               conduits, or rights-of-way will be free from hazardous substances
               at any particular time. Before entering a manhole or performing
               any work within or in the vicinity of SWBT's conduit system or
               any other site subject to access under this Agreement, Applicant
               or personnel acting on Applicant's behalf shall independently
               determine, to their satisfaction, whether such hazardous
               substances are present and conduct their work operations
               accordingly.

          (c)  Each party shall promptly notify the other of hazardous
               substances known by such party to be present within or in the
               vicinity of poles, ducts, conduits, or rights-of-way occupied by
               or assigned to Applicant pursuant to this Agreement if, in the
               sole judgment of such party, such hazardous substances create a
               serious danger to (1) the health or safety of personnel working
               within or in the vicinity of the conduit or (2) the physical
               condition of the other party's facilities placed or to be placed
               within the conduit.

          (d)  Nothing contained in this Agreement (including but not limited to
               the acknowledgments and representations set forth in this
               section) shall relieve either party from its responsibility to
               comply with all applicable environmental laws or its
               responsibility for any liability arising out of such party's
               failure to comply with such laws. Nothing contained in this
               Agreement shall be construed as relieving SWBT of liability for
               hazardous substances present at any site subject to this
               Agreement or as relieving either party of liability for
               introducing hazardous substances to the site or causing or
               contributing to the release of any such substances. Failure to
               comply with the requirements of this section may, however, be
               considered in determining issues relating to negligence,
               causation of injury, and comparative responsibility for injuries
               to persons, property, and the environment.

     6.14 Compliance with Environmental Laws and Regulations. Applicant and SWBT
agree to comply with the following provisions relating to compliance with
environmental laws and regulations.



                                    PAGE 32
<PAGE>   206

          (a)  Facilities attached to SWBT's poles or placed in SWBT's ducts,
               conduits, and rights-of-way following the effective date of this
               Agreement shall be constructed, placed, maintained, repaired, and
               removed in accordance with all applicable federal, state, and
               local environmental statutes, ordinances, rules, regulations, and
               other laws.

          (b)  All persons acting on Applicant's or SWBT's behalf, including but
               not limited to the parties' employees, agents, contractors, and
               subcontractors, shall, when working on, within or in the vicinity
               of SWBT's poles, ducts, conduits, or rights-of-way, comply with
               all applicable federal, state, and local environmental laws,
               including but not limited to all environmental statutes,
               ordinances, rules, and regulations. Applicant and personnel
               acting on Applicant's behalf are expected to be familiar with
               their obligations under environmental laws such as the
               Comprehensive Environmental Response, Compensation, and Liability
               Act (42 U.S.C. ss. 9601 et seq.), the Toxic Substance Control Act
               (15 U.S.C. ss. 2601-2629), the Clean Water Act (33 U.S.C. ss.
               1251 et seq.), and the Safe Drinking Water Act (42 U.S.C. ss.
               300f-300j).

          (c)  The parties shall each establish appropriate procedures and
               controls to assure compliance with all requirements of this
               section.

          (d)  From and after the effective date of this Agreement, neither
               party nor personnel acting on either party's behalf shall
               discharge or release hazardous substances onto or from the site
               of any SWBT pole, duct, conduit, or right-of-way. Neither
               Applicant nor SWBT nor personnel acting on either party's behalf
               shall discharge water or any other substance from any SWBT
               manhole or other conduit facility onto public or private
               property, including but not limited to any storm water drainage
               system, without first determining that such discharge would not
               violate any environmental law, create any environmental risk or
               hazard, or damage the property of any person. Applicant will be
               expected to test such water or substance for hazardous substances
               in accordance with then-applicable SWBT standards and practices.

          (e)  Applicant and SWBT and all personnel performing work on
               Applicant's or SWBT's behalf shall, when working on, within, or
               in the vicinity of SWBT's poles, ducts, conduits, and
               rights-of-way, comply with such additional standards, practices,
               and requirements as SWBT may from time to time adopt to comply
               with environmental laws, provided that such standards are
               communicated in writing to Applicant at least 60 days in advance
               of Applicant's work.

     6.15 Compliance with Other Governmental Requirements (Including
Aeronautical Navigation Safeguards). Facilities attached to SWBT's poles or
placed in 



                                    PAGE 33
<PAGE>   207

SWBT's ducts, conduits, and rights-of-way shall be constructed, placed,
maintained, repaired, and removed in accordance with the ordinances, rules, and
regulations of any governing body having jurisdiction of the subject matter
(including but not limited to any valid ordinances, rules, and regulations
requiring permits, certificates, licenses or the like). Applicant and SWBT shall
comply with all statutes, ordinances, rules, regulations, and other laws
requiring the marking and lighting of aerial wires, cables, and other structures
to ensure that such wires, cables, and structures are not a hazard to
aeronautical navigation.

     6.16 Differences in Specifications. To the extent that there may be
differences in the specifications, the most stringent specification will apply
except as otherwise specifically provided by SWBT in writing. Applicant will
consult with SWBT when Applicant is uncertain as to which specification is to be
followed.

     6.17 Responsibility for the Condition of Facilities. Each party will be
responsible at all times for the condition of its facilities (including but not
limited to those extending from SWBT's poles, ducts, conduits, or rights-of-way
directly to any other location) and for its compliance with the requirements and
specifications of this article and all applicable laws, rules, regulations, and
ordinances.

           ARTICLE 7:  PRIMARY POINTS OF CONTACT, ACCESS TO RECORDS,
                          AND PRE-OCCUPANCY INSPECTIONS

     7.01 Designation of Primary Points of Contact. Each party will, at the
request of the other party, designate a primary point of contact to facilitate
communications between the parties and the timely processing of Applicant's
applications for access to SWBT's poles, ducts, conduits, and rights-of-way
located within this State. Designations of primary points of contact will be
made by written notices including the name, title, address, phone number, and
fax number of the person designated as the primary point of contact; provided,
however, that unless and until a different designation is made, SWBT's primary
point of contact shall be the Utility Liaison Supervisor identified in APPENDIX
VIII. Designation of primary points of contact pursuant to this section will not
affect notice requirements or other legal requirements set forth in other
provisions of this Agreement.

     7.02 Determinations by Applicant of Suitability and Availability. Applicant
shall make its own, independent assessment of the suitability of SWBT's poles,
ducts, conduits, and rights-of-way for Applicant's intended purposes.

     7.03 Access to Records Relating to SWBT's Poles, Ducts, Conduits, and
Rights-of-Way. This section establishes procedures through which certain records
and information relating to SWBT's poles, ducts, conduits, and rights-of-way
will be made available to Applicant for planning and other purposes. Access to
such records and information will be conditioned on Applicant's execution of a
nondisclosure agreement equivalent in substance to the Nondisclosure Agreement
attached to this Agreement as 


                                    PAGE 34
<PAGE>   208

APPENDIX V or such other nondisclosure agreement as shall be mutually acceptable
to the parties, and no person acting on Applicant's behalf will be granted
access to such records and information without first signing such a
nondisclosure agreement. Applicant will reimburse SWBT for all reasonable costs
incurred by SWBT in granting Applicant's requests for access to records and
information under this section.

          (a)  Applicant may, at any time after the effective date of this
               Agreement, request permission to inspect SWBT's pole and conduit
               maps and records, cable plat maps, and other plant location
               records, if any, recording or logging assignments of pole, duct,
               and conduit space. Applicant will be permitted to examine these
               records during regular business hours at a location where copies
               of such records are maintained or at such other location as may
               be mutually agreed upon by the parties. Access to such maps and
               records will be by appointment only, and SWBT will make such maps
               and records available for inspection by Applicant on two business
               days advance notice; provided, however, that Applicant will, as a
               courtesy, when feasible, provide SWBT with 10 business days
               advance notice of its intent to examine such records.

          (b)  The access described in subsection (a) shall include the right to
               make copies, at Applicant's expense, except for cable plat maps,
               which shall be made available for inspection only. In all
               instances, such access shall include the ability to take notes
               and make drawings with references to those maps and records. No
               references to cable counts or circuit information may be included
               in any such copies, notes, or drawings. With respect to other
               cable-specific or customer-specific information, Applicant's
               copies, notes, or drawings may include only such information as
               needed for bona fide engineering and construction purposes (e.g.,
               proposing cable consolidations and identifying plant
               discrepancies) and not for sales, marketing, competitive
               intelligence, competitive analysis, strategic planning, and
               similar activities. Applicant's copies, notes, and drawings may
               include estimates regarding the physical characteristics (such as
               size and weight) of cables when necessary to make engineering
               determinations regarding the capacity, safety, reliability, or
               suitability of SWBT's poles, ducts, conduits, and rights-of-way
               for Applicant's intended uses.

          (c)  SWBT will provide Applicant the best information available from
               SWBT's current pole and conduit maps and records, cable plat
               maps, and other outside plant and construction records. SWBT
               represents that such records reflect approximate geographical
               locations of the facilities depicted and may not accurately
               reflect information such as:

               (1) the exact location of the facilities depicted;



                                    PAGE 35
<PAGE>   209

               (2) the physical size, characteristics, or condition of the
                   facilities depicted;

               (3) the ducts or inner ducts presently occupied, assigned, or
                   available within any particular conduit segment or manhole;

               (4) the arrangement of facilities attached to a pole, the
                   position of facilities suspended between poles or their
                   relationship to each other and to the ground, or the
                   positioning of cables and other facilities housed within
                   ducts, conduits, manholes or other portions of SWBT's conduit
                   system; and

               (5) other information which must be assessed before it can be
                   determined that space is available on or in a pole, duct, or
                   conduit for the attachment or occupancy of Applicant's
                   facilities or that the poles, ducts, or conduits depicted are
                   suitable for Applicant's intended use.

     7.04 Pre-occupancy Inspection of Poles, Ducts, Conduits, and Rights-of-Way.
Applicant shall be permitted to view and inspect specified poles, ducts,
conduits, and rights-of-way on a pre-occupancy basis as provided in this
section.

          (a)  After the effective date of this Agreement, Applicant may view
               specified poles, ducts, conduits, and rights-of-way on a
               pre-occupancy basis. Nothing contained in this section shall
               preclude Applicant from visually inspecting SWBT's poles, ducts,
               conduits, or rights-of-way from any vantage point lawfully
               accessible to Applicant without SWBT's permission.

          (b)  Applicant shall not enter any SWBT manhole for the purpose of
               performing a pre-occupancy inspection without complying with all
               applicable requirements set forth in Article 6 of this Agreement,
               including but not limited to the provisions of Section 6.11
               relating to the opening of manholes.

             ARTICLE 8:  POLE, DUCT, AND CONDUIT SPACE ASSIGNMENTS

     8.01 Selection of Space. Applicant will select the space Applicant will
occupy on SWBT's poles or in SWBT's conduit systems. Applicant's selections will
be based on the same criteria SWBT applies to itself. To enable Applicant to
make such selections in accordance with SWBT's criteria, SWBT will provide
Applicant information about the network guidelines and engineering protocols
used by SWBT in determining the placement of facilities on SWBT's poles and in
SWBT's conduit systems. In conduit systems owned or controlled by SWBT,
maintenance ducts (as defined in Section 3.25) shall not be considered available
for Applicant's use except as specifically provided 



                                    PAGE 36
<PAGE>   210

elsewhere in this Agreement. All other ducts, inner ducts, sub-ducts, and
partitioned conduits which are not assigned or occupied shall be deemed
available for use by SWBT, Applicant, and third parties entitled to access under
the Pole Attachment Act.

     8.02 Pole, Duct, and Conduit Space Assignments. Pole, duct, and conduit
space selected by Applicant will be assigned to Applicant as provided in this
section. Information received by SWBT in connection with this section shall be
subject to the provisions of Article 28 of this Agreement (Confidentiality of
Information).

          (a)  After Applicant's application for a pole attachment or conduit
               occupancy license has been received by SWBT, the pole, duct, and
               conduit space selected by Applicant in such application will be
               assigned to Applicant for a pre-occupancy period not to exceed 12
               months. The assignment (and date and time of assignment) will be
               logged and recorded in the appropriate SWBT records. If such
               space has been provisionally assigned to Applicant as authorized
               below in subsection (b), the 12-month pre-occupancy assignment
               period will begin on the date the provisional assignment is
               recorded in SWBT's records or the date of SWBT's receipt of
               Applicant's notice of intent to occupy under subsection (b),
               whichever date first occurs.

          (b)  SWBT shall, within 60 days after the effective date of this
               Agreement, adopt interim procedures which will enable pole, duct,
               and conduit space to be provisionally assigned to Applicant and
               other applicants prior to the submission of formal applications
               required pursuant to Section 9.02 of this Agreement. Where
               indicated below, the interim procedures will apply to the
               assignment of space to SWBT as well as to Applicant and other
               applicants. SWBT may, on 60 days advance notice to Applicant,
               revise such interim procedures if such procedures prove to be
               unworkable, in which event Applicant may challenge SWBT's
               decision in accordance with procedures available to Applicant
               under applicable federal and state laws and regulations. The
               procedures will enable Applicant and other applicants, by written
               notice, to advise SWBT of their intent to occupy unassigned space
               which appears, from SWBT's records, to be available for
               assignment. Upon receipt of such notice, SWBT shall date-and-time
               stamp the notice and provisionally assign the space selected by
               Applicant or such other applicant by logging and recording the
               assignment (and date and time of assignment) in the appropriate
               SWBT records, which records will be available for inspection as
               provided in Section 7.03 of this Agreement. Space provisionally
               assigned to Applicant or such other applicant will not be
               available for assignment to any other person or entity, including
               SWBT. Notwithstanding such provisional assignment, Applicant
               shall not occupy such space without first obtaining a license,
               except as provided in Section 8.03. The following additional
               requirements shall apply.


                                    PAGE 37
<PAGE>   211

               (1) Before giving SWBT notice of its intent to occupy unassigned
                   space, Applicant shall make a good faith determination that
                   it actually plans to occupy such space. The assignment
                   process shall not be used by either party for the purpose of
                   holding or reserving space which such party does not plan to
                   use or for the purpose of precluding SWBT or any other person
                   or entity from utilizing or having access to SWBT's poles,
                   ducts, conduits, or rights-of-way.

               (2) With respect to unassigned conduit occupancy space, the
                   notice must include all information required to enable SWBT
                   and joint users, including other persons or entities which
                   may from time to time seek space in the same ducts and
                   conduits, to determine the specific space which Applicant
                   desires to occupy. The notice must, therefore, include, at a
                   minimum, the following information:

                   (i)   the specific conduit sections, and each manhole, to be
                         occupied;

                   (ii)  the number of ducts, and number of inner ducts, to be
                         occupied by Applicant within each conduit section;

                   (iii) the physical size (diameter) of the cables to be placed
                         in such duct, if known, or the maximum and minimum
                         sizes of the cables which may be placed if more than
                         one size cable is being considered for the space to be
                         occupied;

                   (iv)  the anticipated use by Applicant of any infrequent
                         construction techniques and connectivity solutions
                         authorized under Section 6.03 to avoid high or unusual
                         expenditures;

                   (v)   Applicant's best estimates of the dates when Applicant
                         plans to begin and complete construction at the sites
                         specified in the notice;

                   (vi)  if applicable, a conspicuous statement that Applicant
                         intends to occupy the space before the issuance of a
                         license, as provided in Section 8.03 of this Agreement;
                         and

                   (vii) if applicable, a conspicuous statement, as required by
                         Section 5.06 of this Agreement, that the notice
                         pertains to a building entrance or building
                         distribution duct or conduit or other space within a
                         building.


                                    PAGE 38
<PAGE>   212

               (3) With respect to unassigned pole space, such notice must
                   include all information required to enable SWBT and other
                   joint users, including other persons or entities seeking
                   space on the same poles, to determine the specific space
                   which Applicant desires to occupy. The notice must,
                   therefore, include, at a minimum, the following information:

                   (i)   the specific poles to be occupied;

                   (ii)  the specific space on each pole to be occupied,
                         including the height (distance from the ground) of the
                         attachment and the side (road or field) where the
                         attachment is to be made;

                   (iii) the anticipated number and types of cables to be
                         attached, together with the anticipated physical size
                         (diameter) and weight (weight per foot) of such cables,
                         and the anticipated number and types of strands, if
                         any, to be used to support the cables, such information
                         to be sufficient to give notice to SWBT and other joint
                         users of the remaining space on the pole available and
                         what facilities modification, capacity expansion, or
                         make-ready work may be required of subsequent
                         applicants as a result of the provisional assignment of
                         space to Applicant;

                   (iv)  the anticipated use by Applicant of any infrequent
                         construction techniques and connectivity solutions
                         authorized under Section 6.03 to avoid high or unusual
                         expenditures;

                   (v)   Applicant's best estimates of the dates when Applicant
                         plans to begin and complete construction at the sites
                         specified in the notice; and

                   (vi)  if applicable, a conspicuous statement that Applicant
                         intends to occupy the space before the issuance of a
                         license, as provided in Section 8.03 of this Agreement.

               (4) No later than 30 days after giving such notice, Applicant
                   shall file an application under Section 9.02 or the
                   provisional assignment will lapse.

               (5) As stated in Section 7.03(c), SWBT does not represent that
                   its records accurately reflect the information necessary to
                   enable Applicant to rely upon a records-based assignment
                   process. SWBT shall have no duty to verify that space
                   provisionally assigned pursuant to this subsection is
                   actually available.








                                    PAGE 39
<PAGE>   213




               (c) Assignments made prior to the issuance of a license will be
                   provisional assignments and will be subject to modification
                   if it is subsequently determined that the space selected by
                   or assigned to Applicant is already occupied or that a
                   different assignment is required to comply with SWBT's
                   standards for assigning pole, duct, and conduit occupancy
                   space.

               (d) Applicant's obligation to pay semiannual pole attachment or
                   conduit occupancy fees will commence from the date of
                   assignment or provisional assignment, as logged and recorded
                   in the appropriate SWBT records.

               (e) During the 12-month assignment period following the date
                   space is assigned to Applicant and entered into the
                   appropriate SWBT record, SWBT shall not occupy or use such
                   space without Applicant's permission, shall not assign such
                   space to any party other than Applicant, and shall not
                   knowingly permit any party other than Applicant to occupy or
                   use such space without Applicant's permission except as
                   otherwise specifically provided in this Agreement. The
                   assignment to Applicant will automatically lapse 12 months
                   after the date the assignment has been entered into the
                   appropriate SWBT record if Applicant has not occupied such
                   assigned space within such 12-month period; provided,
                   however, that if Applicant's failure to occupy the space
                   within such 12-month period results from SWBT's failure to
                   perform make-ready work on schedule, the parties shall
                   negotiate a single extension of the assignment period, which
                   extension shall not extend the assignment period beyond three
                   months from the date of completion of SWBT's make-ready work;
                   and, provided further, that if Applicant can demonstrate that
                   its failure to occupy the space within such 12-month period
                   results from the actions of SWBT or third parties other than
                   persons acting on Applicant's behalf, or from acts of God,
                   the assignment may be extended for a period no longer than
                   three months from the date Applicant is first able to
                   commence construction activities at the site involved.
                   Assignments to third parties shall be subject to the same
                   rules applicable to Applicant under this subsection.
                   Extensions permitted under this subsection must be requested
                   in writing before expiration of the original 12-month period
                   and shall be recorded on the appropriate SWBT records
                   available for inspection under Section 7.03.

               (f) SWBT may assign space to itself by making appropriate entries
                   in the same records used to log assignments to Applicant and
                   third parties. If SWBT assigns pole, duct, or conduit space
                   to itself, such assignment will automatically lapse 12 months
                   after the date the assignment has been entered into the
                   appropriate SWBT record if SWBT has not occupied such
                   assigned space within such 12-month period; provided,



                                    PAGE 40
<PAGE>   214

                   however, that if SWBT's failure to occupy the space within
                   such 12-month period results from the actions of Applicant or
                   third parties other than persons acting on SWBT's behalf, or
                   from acts of God, SWBT's assignment may be extended for a
                   period no longer than three months from the date SWBT is able
                   to commence construction at the site involved. Extensions
                   permitted under this subsection must be recorded before
                   expiration of the original 12-month period on the appropriate
                   SWBT records available for inspection under Section 7.03.

               (g) If facilities modifications, capacity expansions, or other
                   make-ready work are required due to the assignment of space
                   to either party under this section, the party to whom such
                   space has been assigned will reimburse the person or entity
                   incurring the costs for such facilities modifications,
                   capacity expansions, or make-ready work if the party to whom
                   such space has been assigned fails to occupy the assigned
                   space within the 12-month assignment period or any extension
                   thereof.

               (h) Except as provided in subsections (e)-(f) above, assignments
                   shall not be extended, renewed, or sequentially repeated in
                   any manner (other than by actual occupancy) that enables
                   Applicant, SWBT, or any joint user to preclude access by
                   others to unused pole attachment or conduit occupancy space
                   for any period greater than 12 months after the date of
                   initial assignment.

               (i) At Applicant's election, Applicant may file an application
                   for access which specifically requests that the space sought
                   by Applicant not be assigned to Applicant immediately and not
                   be recorded immediately in the SWBT records available for
                   inspection by other telecommunications carriers, cable
                   television systems, or other providers of telecommunications
                   services under Section 7.03 of this Agreement. In that event,
                   the space sought by Applicant will not be assigned to
                   Applicant and will remain available for assignment to others
                   without restriction until such time as such space is formally
                   assigned to Applicant in accordance with Applicant's written
                   instructions and the assignment is recorded in the records
                   available for inspection under Section 7.03. The assignment
                   shall be made no later than the date of issuance to Applicant
                   of a license confirming that Applicant has the right to
                   occupy the space described in the license. In the event that
                   Applicant elects to proceed under this subsection,
                   Applicant's obligation to pay pole attachment and conduit
                   occupancy fees shall not commence until the date the
                   assignment is recorded in the appropriate SWBT records and
                   Applicant shall bear the risks that (1) the space sought by
                   Applicant will be assigned to and occupied by another person
                   or entity or (2) circumstances will occur which may require
                   that SWBT reevaluate 


                                    PAGE 41
<PAGE>   215

                   Applicant's application and repeat the field inspection
                   portion of the pre-license survey at Applicant's expense.

               (j) Notices and applications including assignment requests will
                   be date- and time-stamped on receipt. Because space will be
                   selected and further assignments made based on entries logged
                   and recorded in the appropriate SWBT records, the date and
                   time of assignment will be the date and time when the
                   assignment is recorded rather than the date and time of
                   receipt of the application or notice requesting such
                   assignment. Although SWBT's clerical personnel will promptly
                   process assignment requests included in applications and
                   notices transmitted to SWBT by mail, courier, fax, or other
                   transmission media, SWBT shall not be liable for any failure
                   by Applicant to obtain the space desired by Applicant due to
                   delay in logging assignment requests. Applicant acknowledges
                   that, to maximize the probability that Applicant will be
                   assigned the space Applicant desires, Applicant should, when
                   possible, submit applications and notices including
                   assignment requests in person to SWBT at the site where the
                   applicable records are maintained and should countersign the
                   entry reflecting the assignment and time of assignment.

     8.03 Immediate Occupancy. SWBT shall, within 60 days after the effective
date of this Agreement, adopt interim procedures which will provide Applicant
the ability to attach or place facilities on or in SWBT's poles, ducts,
conduits, and rights-of-way on an immediate basis when such space is available
for Applicant's use and no make-ready work or infrequent construction techniques
or connectivity solutions are required. SWBT may, on 60 days advance notice to
Applicant, revise or terminate such interim procedures if they prove to be
unworkable, in which event Applicant may seek renegotiation of this Agreement or
challenge SWBT's decision in accordance with procedures available to Applicant
under applicable federal and state laws, regulations, and commission orders. The
special procedures established under this section shall supplement, rather than
replace, the regular assignment and licensing procedures set forth in Articles
8-10 of this Agreement, are intended to be used only under special circumstances
(e.g., when the regular procedures allow insufficient time to meet customer
service commitments or resolve non-routine construction or network
contingencies), shall not be used on a routine basis, and shall be consistent
with subsections (a)-(f) below.

               (a) Upon giving SWBT the notice required by this subsection,
                   Applicant may immediately occupy space assigned or
                   provisionally assigned to Applicant pursuant to Section 8.02
                   of this Agreement. The notice shall be contained in either a
                   notice of intent to occupy as provided in Section 8.02(b) or
                   a license application under Section 9.02. Applicant shall not
                   give such notice or occupy such space without first reviewing
                   SWBT's records and determining that the records reflect that
                   the space sought is available.


                                    PAGE 42
<PAGE>   216

               (b) Applicant shall not occupy space which has not been assigned
                   or provisionally assigned to Applicant. The assignment must
                   be recorded on the appropriate SWBT records, as provided in
                   Section 8.02, prior to Applicant's occupancy. If Applicant
                   subsequently determines that the records are inaccurate and
                   that the space assigned to Applicant is not available, or
                   that the space assigned is not suitable for Applicant's
                   intended use, Applicant shall, within one business day,
                   notify SWBT in writing that it no longer intends to occupy
                   the space earlier assigned and is releasing the assignment.
                   Except as otherwise provided in this subsection, Applicant
                   shall not occupy other space on the pole or in the duct or
                   conduit without first obtaining an assignment or provisional
                   assignment of the space which Applicant will occupy. To avoid
                   high or unusual expenditures resulting from unanticipated
                   conditions at the site, Applicant may occupy space not
                   assigned to Applicant subject to the following terms and
                   conditions.

                   (1)   Applicant may occupy the next available space shown on
                         SWBT's records as available at the time of Applicant's
                         last review of the records. Applicant shall not
                         knowingly occupy space occupied by or assigned to SWBT
                         or any third party without consent of the party to whom
                         the space has been assigned.

                   (2)   Within one business day after occupying such space,
                         Applicant shall submit to SWBT a written notice of
                         intent to occupy or an application for the space
                         occupied showing the reason for Applicant's use of the
                         space occupied.

                   (3)   Applicant shall bear the risk that space occupied by
                         Applicant pursuant to this section was assigned to SWBT
                         or a third party during the period between Applicant's
                         last review of the records and Applicant's occupancy of
                         such space. After occupying space not previously
                         assigned to Applicant, Applicant shall review the
                         records and promptly notify the affected party if
                         Applicant determines that it has occupied space
                         assigned to such party. At the request of the party to
                         whom such space has been assigned, Applicant shall,
                         within 24 hours, or within such other period of time
                         mutually agreed to by the parties affected, remove its
                         facilities from the space in question if the parties
                         affected cannot reach an acceptable alternative
                         solution. SWBT and Applicant anticipate that all
                         parties affected will act in good faith to work out
                         acceptable solutions and that the parties affected will
                         not insist on strict adherence to the 24-hour removal
                         requirement unless there is a legitimate business need
                         for compelling removal within such time period.



                                    PAGE 43
<PAGE>   217

                   (4)   SWBT shall be entitled to recover from Applicant actual
                         costs, if any, directly incurred by SWBT as a result of
                         Applicant's decision under this subsection to occupy
                         space subject to a valid prior assignment to SWBT.
                         Applicant shall indemnify, on request defend, and save
                         SWBT harmless from any injury, loss, damage, liability,
                         or claim asserted against SWBT by any third party
                         resulting from Applicant's decision under this
                         subsection to occupy space assigned to such third
                         party.

               (c) Nothing in this section authorizes Applicant to place its
                   facilities on or in any pole, duct, or conduit space already
                   occupied by the facilities of SWBT or a third party, even if
                   the presence of such facilities is not reflected on SWBT's
                   records.

               (d) Nothing in this section authorizes Applicant, without first
                   obtaining SWBT's written authorization, to (1) place its
                   facilities on any pole or in any duct or conduit that
                   requires make-ready work (other than third-party make-ready
                   work arranged directly by Applicant) or (2) utilize any
                   infrequent construction technique or connectivity solution
                   described in Section 6.03.

               (e) If Applicant has not done so already, within 24 hours after
                   occupying space pursuant to this section, Applicant will
                   submit to SWBT an application for the space occupied as
                   provided in Section 9.02 of this Agreement. The application
                   may be submitted by fax.

               (f) Applicant will bear all risks resulting from the possibility
                   that assigned space which appears from the records to be
                   available is not available or in suitable condition to be
                   used by Applicant and shall indemnify, on request defend, and
                   hold SWBT harmless from any injury, loss, damage, claim, or
                   liability (including but not limited to third-party claims)
                   resulting from Applicant's occupancy of space in violation of
                   this section.

                ARTICLE 9:  APPLICATIONS AND PRE-LICENSE SURVEYS

     9.01 Licenses Required. Except as otherwise specifically permitted in this
Agreement, Applicant shall apply in writing for and receive a license before
attaching facilities to specified SWBT poles or placing facilities within
specified SWBT ducts, conduits, manholes, or handholes. License applications and
information received by SWBT in connection with such applications shall be
subject to the provisions of Article 28 of this Agreement (Confidentiality of
Information).

     9.02 Application Form. To apply for a pole attachment or conduit occupancy
license under this Agreement, Applicant shall submit to SWBT two signed copies
of the 


                                    PAGE 44
<PAGE>   218

appropriate application forms. SWBT represents that the forms specified in
subsections (a)-(b) are forms in use prior to the effective date of this
Agreement and that SWBT is in the process of revising such forms to conform to
the provisions of this Agreement and to streamline the application process. The
parties therefore agree that the forms specified in subsections (a) and (b) will
be interim forms only. SWBT reserves the right to change the format and content
of these forms upon 60 days written notice to Applicant.

                   (a)   To apply for a pole attachment license, Applicant shall
                         submit to SWBT two signed copies of SWBT's Form SW-9434
                         ("Access Application and Make-Ready Authorization")
                         together with completed Form SW-9433 ("Pole
                         Attachments"). An application for a pole attachment
                         license will not be complete or subject to processing
                         by SWBT until these forms have been submitted to SWBT;
                         provided, however, that such forms will be deemed to be
                         substantially complete if they contain the information
                         specified in subsections (c)-(h) below, as applicable.
                         Copies of Forms SW-9433 and SW-9434 are attached to
                         this Agreement as parts of APPENDIX III.

                   (b)   To apply for a conduit occupancy license, Applicant
                         shall submit to SWBT two signed copies of SWBT's Form
                         SW-9434 ("Access Application and Make-Ready
                         Authorization") together with completed Form SW-9435
                         ("Conduit Occupancy"). An application for a conduit
                         occupancy license will not be complete or subject to
                         processing by SWBT until these forms have been
                         submitted to SWBT; provided, however, that such forms
                         will be deemed to be substantially complete if they
                         contain the information specified in subsections
                         (c)-(h) below, as applicable. Copies of Forms SW-9434
                         and SW-9435 are attached to this Agreement as parts of
                         APPENDIX III.

                   (c)   Each application for a license under this Agreement
                         shall include, at a minimum, the following information:

                         (1)  the poles, ducts, and conduits (including all
                              manholes) along Applicant's proposed route to or
                              within which Applicant desires to attach or place
                              its facilities;

                         (2)  a description of the facilities to be attached to
                              SWBT's poles and a description of the facilities
                              to be placed within each component of SWBT's
                              conduit system (including but not limited to
                              ducts, conduits, manholes, and handholes) along
                              the proposed route;

                         (3)  for poles, the proposed points of attachment;

                         (4)  for building entrance or building distribution
                              ducts or conduits or other space within a
                              building, a conspicuous statement, as required 


                                    PAGE 45
<PAGE>   219

                              by Section 5.06 of this Agreement, that the
                              application pertains to a building entrance or
                              building distribution duct or conduit or other
                              space within a building;

                         (5)  if applicable, a conspicuous notation that the
                              space requested is not to be assigned (or billed)
                              to Applicant until SWBT has received Applicant's
                              written instruction to make such assignment or
                              issued a license authorizing Applicant to occupy
                              the space requested; and

                         (6)  if applicable, a conspicuous statement that
                              Applicant intends to occupy the space before the
                              issuance of a license, as provided in Section 8.03
                              of this Agreement.

                    (d)  Facilities descriptions which apply to multiple pole
                         attachments or conduit occupancies need only be
                         described once on any form. Facilities descriptions
                         shall include, at a minimum, the following information:

                         (1)  the number and types of cables, including the
                              physical size (diameter) and weight (weight per
                              foot);

                         (2)  the number and types of strands, if any, which
                              will be used to support the cables, including the
                              rated holding capacity expressed in thousand pound
                              increments (e.g., 2.2M) of such strands; and

                         (3)  sufficient information to identify and describe
                              the physical characteristics (size, dimensions,
                              and weight) of apparatus enclosures and other
                              facilities to be attached to SWBT's poles or
                              placed in SWBT's conduit system.

                    (e)  When it appears to Applicant that facilities
                         modification, capacity expansion, or make-ready work
                         may be required to accommodate Applicant's access
                         requests, Applicant shall describe the facilities
                         modification, capacity expansion, or make-ready work
                         which Applicant proposes. Applicant shall also describe
                         its plans, if any, to use any infrequent construction
                         technique or connectivity solution authorized under
                         Section 6.03 to avoid high or unusual expenditures and
                         state its reasons for the use of such technique or
                         solution.

                    (f)  Applicant acknowledges that the poles along a
                         particular pole line or route may include poles owned
                         by firms (such as electric utilities) other than SWBT,
                         that it may be necessary for SWBT to rearrange its
                         facilities or perform other make-ready work on poles
                         other than poles it owns or controls in order to
                         accommodate Applicant's request for access to SWBT's
                         poles and that, at the time an application is
                         submitted, it may be difficult for Applicant to
                         determine with certainty whether a particular 


                                    PAGE 46
<PAGE>   220

                         pole is owned or controlled by SWBT or by another
                         entity. Accordingly, the application shall, to the
                         extent feasible, identify all poles utilized by SWBT
                         (without regard to ownership) along Applicant's
                         proposed route.

                    (g)  Each application for a license under this Agreement
                         shall be accompanied by a construction schedule showing
                         Applicant's projected dates for beginning and
                         completing construction at the sites specified in the
                         application. Information on this schedule may be used
                         by SWBT's engineering and outside plant construction
                         personnel in scheduling work required to process
                         Applicant's applications and scheduling such capacity
                         expansions, make-ready work, and facilities
                         modifications, if any, as may be necessary to
                         accommodate Applicant's facilities.

                    (h)  Applicant may include multiple cables in a single
                         license application and may provide multiple services
                         (e.g., CATV and non-CATV services) under the same cable
                         sheath or jacket. When both CATV and non-CATV services
                         are provided under the same cable sheath or jacket, or
                         CATV and non-CATV services are provided using different
                         cables attached or lashed to the same strand or
                         otherwise occupying the same space on a pole or the
                         same duct or inner duct within a conduit, Applicant
                         will so advise SWBT and SWBT shall, if permitted by
                         law, adjust its charges to enable SWBT to charge
                         Applicant the rate applicable to telecommunications
                         carriers rather than the rate applicable to cable
                         television systems solely to provide cable service.

     9.03 Cooperation in the Application Process. The orderly processing of
applications submitted by Applicant and other firms seeking access to SWBT's
poles, ducts, conduits, and rights-of-way requires good faith cooperation and
coordination between SWBT's personnel and personnel acting on behalf of
Applicant and other firms seeking access. The parties therefore agree to the
following transitional procedures which will remain in effect during the term of
this Agreement unless earlier modified by mutual agreement of the parties.

                    (a)  Before submitting a formal written application for
                         access to SWBT's poles, ducts, conduits, and
                         rights-of-way, the firm submitting the application
                         shall make a good faith determination that it actually
                         plans to attach facilities to or place facilities
                         within the poles, ducts, conduits, or rights-of-way
                         specified in the application. Applications shall not be
                         submitted for the purpose of holding or reserving space
                         which the applicant does not plan to use or for the
                         purpose of precluding SWBT or any other provider of
                         telecommunications or cable television services from
                         using such poles, ducts, conduits, or rights-of-way.


                                    PAGE 47
<PAGE>   221

                    (b)  Applicant shall only submit applications for access to
                         poles, ducts, conduits, and rights-of-way which it
                         plans to use within one year following the date access
                         is granted and shall use its best efforts to submit
                         applications in an orderly manner in accordance with
                         Applicant's needs. If Applicant contemplates the need
                         to submit more than 10 applications within any 45-day
                         period with respect to poles, ducts, conduits, and
                         rights-of-way within the territory of any single SWBT
                         construction district, Applicant shall give SWBT
                         advance notice as promptly as is reasonably
                         practicable.

                    (c)  No more than 300 poles shall be the subject of any
                         single pole attachment license application.

                    (d)  No more than 20 manholes shall be the subject of any
                         single conduit occupancy license application.

     9.04 Applicant's Priorities. When Applicant has multiple applications on
file within a single SWBT construction district, Applicant shall, at SWBT's
request, designate its desired priority of completion of pre-license surveys,
facilities modifications, capacity expansions, and make-ready work with respect
to all such applications.

     9.05 Pre-license Survey. A pre-license survey (including a review of
records and field inspection, if necessary) will be completed by SWBT after
Applicant has submitted its written license application as specified in Section
9.02 of this Agreement. SWBT shall not, without due cause and justification,
repeat pre-occupancy survey work performed by Applicant.

                    (a)  The field inspection portion of the pre-license survey,
                         which includes the visual inspection of existing pole
                         and conduit facilities, shall be performed by SWBT or
                         its authorized representative. Primary purposes of the
                         field inspection will be to enable SWBT to (1) confirm
                         or determine the facilities modification, capacity
                         expansion, and make-ready work, if any, necessary to
                         accommodate Applicant's facilities; (2) plan and
                         engineer the facilities modification, capacity
                         expansion, and make-ready work, if any, required to
                         prepare SWBT's poles, ducts, conduits, rights-of-way,
                         and associated facilities for Applicant's proposed
                         attachments or occupancy; and (3) estimate the costs
                         associated with such facilities modification, capacity
                         expansion, or make-ready work. SWBT may dispense with
                         the field inspection if it appears that the information
                         necessary to process Applicant's license application is
                         already available from existing sources, including the
                         application forms and such other information as may be
                         available to SWBT. If Applicant has occupied the space
                         requested before the issuance of a license, a
                         post-installation inspection of Applicant's 


                                    PAGE 48
<PAGE>   222

                         facilities may be performed, in place of the field
                         inspection portion of the pre-license survey, to
                         determine whether such facilities are in compliance
                         with the specifications of Article 6 and other
                         provisions of this Agreement. In performing such
                         inspection, SWBT will not, without due cause and
                         justification, repeat pre-occupancy survey work
                         performed by Applicant.

                    (b)  The administrative processing portion of the
                         pre-license survey (which includes processing the
                         application and reviewing records) will be performed by
                         SWBT.

                    (c)  Before performing any portion of the pre-license
                         survey, SWBT shall obtain Applicant's written
                         authorization to perform such work. Authorization may
                         be given, when possible, when the application is
                         submitted. No authorization shall be required for
                         post-installation inspections of Applicant's facilities
                         when installation has occurred before the issuance of a
                         license.


                  ARTICLE 10:  ISSUANCE AND DENIAL OF LICENSES
                      (INCLUDING FACILITIES MODIFICATIONS,
                    CAPACITY EXPANSIONS, AND MAKE-READY WORK

     10.01 Response Within 45 Days. Within 45 days of Applicant's submission of
a license application pursuant to Section 9.02 of this Agreement, or within such
other period of time as may be mutually agreed upon in writing by the parties,
SWBT shall respond to the application. The response shall state whether the
application is being granted or denied. If denial is anticipated, or if SWBT
personnel involved in the processing of Applicant's request for access become
aware of hazardous substances at the site requested by Applicant, SWBT shall
promptly advise Applicant and shall, at Applicant's request, discuss
alternatives to denial and issues associated with the presence of such hazardous
substances. Additional state-specific response and notice requirements, if any,
shall be addressed by an addendum to this Agreement.

                    (a)  If access is granted, SWBT shall, no later than 45 days
                         after Applicant's submission of the license
                         application, further advise Applicant in writing (1)
                         what facilities modifications, capacity expansions, or
                         make-ready work, if any, will be required to prepare
                         SWBT's pole or conduit facilities, (2) provide
                         Applicant an estimate of charges for such facilities
                         modifications, capacity expansions, or make-ready work
                         and (3) disclose to Applicant any hazardous substances
                         known by SWBT to be present at the site.

                    (b)  SWBT may take into account issues of capacity, safety,
                         reliability, and engineering when considering requests
                         for access, provided the assessment of such factors is
                         done in a nondiscriminatory manner. If 


                                    PAGE 49
<PAGE>   223

                         access is denied, SWBT shall confirm the denial in
                         writing by the 45th day after the receipt by SWBT of
                         Applicant's completed application. A denial of access
                         shall be specific, shall include all relevant evidence
                         and information supporting the denial, and shall
                         explain how such evidence and information relates to a
                         denial of access for reasons of lack of capacity,
                         safety, reliability, or generally applicable
                         engineering purposes. If Applicant in its completed
                         application sets forth in writing specific proposals
                         for expanding capacity, the denial statement shall
                         specifically address such proposals.

                    (c)  Applicant agrees that if, at any time prior to the 45th
                         day, it has determined that it no longer seeks access
                         to specific poles, ducts, or conduit facilities,
                         Applicant shall promptly withdraw or amend its
                         application, thereby minimizing the administrative
                         burdens on SWBT of processing and responding to the
                         application.

                    (d)  Notwithstanding the 45-day deadline, SWBT will,
                         pursuant to Section 8.03 of this Agreement, make
                         available to Applicant for immediate occupancy any
                         pole, duct, or conduit space which is not currently
                         assigned, not designated as a maintenance duct, and not
                         subject to applicable make-ready requirements.

                    (e)  If SWBT fails to respond in writing within 30 days of
                         SWBT's documented receipt of a license application
                         pursuant to Section 9.02 of this Agreement, or within
                         such other period of time as may be mutually agreed
                         upon in writing by the parties, Applicant may by
                         written notice inquire whether SWBT intends to deny
                         Applicant's request for access. After such notice has
                         been given and receipt by SWBT of a properly submitted
                         license application has been confirmed, SWBT's failure
                         to respond in writing within 15 days after receipt of
                         the notice shall be deemed to constitute approval of
                         the request for access. In such event, Applicant shall
                         be entitled to occupy the space requested without the
                         formality of a license; provided, however, that nothing
                         contained in this subsection shall authorize Applicant
                         to occupy space already occupied or subject to a prior
                         valid space assignment to SWBT or any third-party; and
                         provided further that nothing in this subsection
                         authorizes Applicant, without first obtaining SWBT's
                         written authorization, to (1) place its facilities on
                         any pole or in any duct or conduit that requires
                         make-ready work (other than third-party make-ready work
                         arranged directly by Applicant) or (2) utilize any
                         infrequent construction technique or connectivity
                         solution described in Section 6.03.

     10.02 Obligation to Construct or Modify Facilities; Capacity Expansions.
SWBT may grant access subject to Applicant's approval of such make-ready work
(including facilities modifications) as may be required to expand capacity to
accommodate 


                                    PAGE 50
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Applicant's request, in which event Applicant shall either accept such
conditions, initiate good faith negotiations to explore other potential
accommodations, or withdraw its request for access. If SWBT does not offer to
expand capacity and denies Applicant's request for access, SWBT shall promptly
notify Applicant of such determination. SWBT shall not deny Applicant's request
for access on lack of capacity grounds when capacity can be expanded as provided
in this section and in Section 6.03 (infrequent construction techniques and
connectivity solutions).

                    (a)  At Applicant's request, SWBT will replace, expand, or
                         modify its poles and conduit system, or otherwise
                         expand the capacity of such facilities to accommodate
                         the placement of Applicant's facilities; provided,
                         however, that such modifications shall be consistent
                         with the capacity, safety, reliability, and engineering
                         considerations which SWBT would apply to itself if the
                         work were performed for SWBT's own benefit. Outside
                         plant facilities modifications and capacity expansions
                         contemplated by this subsection include, but are not
                         limited to, installation of inner duct, cable
                         consolidations and the removal of cables that are
                         retired or inactive (dead). Except as otherwise
                         specifically provided in this section, SWBT may recover
                         from Applicant the costs of facilities modifications
                         and capacity expansions to make space available for
                         Applicant's facilities and charges for such
                         modifications and expansions shall be determined and
                         billed as provided in APPENDIX I of this Agreement.

                    (b)  SWBT will, at its own expense, install inner duct in
                         SWBT's conduit system as necessary to make space
                         available for Applicant's facilities. Inner duct
                         installations to accommodate Applicant's facilities
                         will be performed by SWBT within the same time
                         intervals which would apply if SWBT were performing
                         such installations for itself. If SWBT's intervals for
                         beginning or completing inner duct installation do not
                         meet Applicant's needs, Applicant may arrange for the
                         inner duct installation to be performed by an
                         authorized contractor selected by Applicant from a
                         list, jointly developed and maintained by the parties,
                         of contractors mutually approved as qualified to
                         perform inner duct installations. Applicant may install
                         the inner duct itself if Applicant is on the list of
                         mutually approved contractors at the time the work is
                         performed. When inner duct is installed in SWBT's
                         conduit system by Applicant or an authorized contractor
                         selected by Applicant, SWBT will provide the
                         inner-ducting materials to be installed and Applicant
                         shall bear all other installation expenses. Applicant
                         shall give SWBT sufficient advance notice of the
                         materials needed to enable SWBT to provide such
                         materials to Applicant on a timely basis. Applicant
                         shall return all unused materials, including unused
                         inner duct and reels, to SWBT or purchase them from
                         SWBT. Inner duct installed by Applicant or an
                         authorized contractor selected by Applicant shall be
                         installed in accordance with 


                                    PAGE 51
<PAGE>   225

                         SWBT's specifications and in accordance with the same
                         standards and practices which would be followed if the
                         inner duct were being installed by SWBT or SWBT's
                         contractors. Applicant shall indemnify, on request
                         defend, and hold SWBT harmless for any injuries,
                         losses, damages, claims, or liabilities directly
                         resulting from the installation of inner duct by
                         Applicant or any authorized contractor selected by
                         Applicant under this subsection. Applicant shall not,
                         without SWBT's prior written approval, arrange for
                         inner duct installation to be performed by
                         subcontractors who are not authorized contractors.

                    (c)  SWBT shall, at its expense, remove cables that are
                         retired or inactive (dead) to free-up requested duct
                         and pole space, provided that such removal is
                         reasonably feasible (i.e., cable pulls easily without
                         incident). If a section of cable is "frozen" in a duct
                         and would require excavation to remove, Applicant may,
                         at its option, request that SWBT excavate the
                         obstruction or, in the alternative, arrange for
                         excavation of the obstruction to be performed by an
                         authorized contractor selected by Applicant from a
                         list, jointly developed and maintained by the parties,
                         of contractors mutually approved as qualified to
                         perform such excavations. Applicant may excavate the
                         obstruction itself if Applicant is on the list of
                         mutually approved contractors at the time the work is
                         performed. Such excavations will be at Applicant's
                         expense. Removal of the remainder of the cable will be
                         at SWBT's expense. Excavation work performed by
                         Applicant or an authorized contractor selected by
                         Applicant shall be performed in accordance with SWBT's
                         specifications and in accordance with the same
                         standards and practices which would be followed if such
                         excavation work were being performed by SWBT or SWBT's
                         contractors. Neither Applicant nor any authorized
                         contractor selected by Applicant to perform excavation
                         work under this subsection shall conduct facility
                         excavation activities in any manner which jeopardizes
                         or degrades the integrity of SWBT's structures or
                         interferes with any existing use of the facilities.
                         Applicant shall indemnify, on request defend, and hold
                         SWBT harmless for any injuries, losses, darnages,
                         claims, or liabilities directly resulting from the
                         performance of excavation work by Applicant or any
                         authorized contractor selected by Applicant under this
                         subsection. Applicant shall not, without SWBT's prior
                         written approval, arrange for excavation work to be
                         performed under this subsection by subcontractors who
                         are not qualified contractors.

     10.03 Issuance of Licenses and Immediate Access When No Make-ready Work is
Required. If, on the basis of Applicant's representations or SWBT's field
inspection, if any, SWBT determines that no make-ready work is necessary to
accommodate Applicant's facilities, SWBT will issue a license without performing
make-ready work and pole attachment or conduit occupancy space will be made
available to Applicant for 


                                    PAGE 52
<PAGE>   226

immediate occupancy. Immediate occupancy prior to the issuance of a license
shall be governed by Section 8.03.

     10.04 Make-ready Work. If SWBT determines that make-ready work will be
necessary to accommodate Applicant's facilities, SWBT shall promptly notify
Applicant of the make-ready work proposed to enable the accommodation of
Applicant's facilities.

                    (a)  The notice shall be given in writing no later than 45
                         days after the receipt by SWBT of Applicant's completed
                         application pursuant to Section 9.02 of this Agreement
                         or within such other period of time as may be mutually
                         agreed upon in writing by the parties.

                    (b)  The notice will include SWBT's estimate of make-ready
                         charges, which estimate shall be stated on SWBT Form
                         SW-9434 ("Access Application and Make-Ready
                         Authorization"), a copy of which is attached hereto as
                         part of APPENDIX III.

                    (c)  Applicant shall have 20 days (the "acceptance period")
                         after receiving SWBT's estimate of make-ready charges
                         to authorize completion of the make-ready work proposed
                         by SWBT or to advise SWBT of its willingness to perform
                         the proposed make-ready work itself. If Applicant
                         advises SWBT that it is willing to perform the
                         make-ready work proposed by SWBT in accordance with
                         SWBT's plans and specifications, SWBT will not, without
                         due cause and justification, refuse to accept
                         Applicant's offer to perform the work. Authorization
                         shall be accomplished by Applicant's signing the
                         estimate and returning it to SWBT within the 20-day
                         acceptance period.

                    (d)  Within the 20-day acceptance period, the parties may
                         negotiate modifications of the make-ready work to be
                         performed. If the parties reach agreement through
                         negotiation, a new estimate shall be prepared and
                         authorization shall be accomplished by Applicant's
                         signing the revised estimate and returning it to SWBT
                         within the original 20-day acceptance period, or within
                         such period of time as may be mutually agreed upon by
                         the parties.

                    (e)  If Applicant does not sign and return the estimate
                         within the 20-day acceptance period, or within such
                         other period of time as may be mutually agreed upon in
                         writing by the parties, Applicant shall notify SWBT in
                         writing by the 20th day whether Applicant is
                         withdrawing its application, electing to perform the
                         make-ready work itself as provided in subsection (c) or
                         electing to treat SWBT's make-ready requirements as a
                         denial of access.


                                    PAGE 53
<PAGE>   227

                    (1)  If no such notice is given by the 20th day, or such
                         later date as may be mutually agreed upon by the
                         parties, SWBT shall contact Applicant to determine
                         whether Applicant intends to withdraw its application.
                         Applicant shall be deemed to have withdrawn its
                         application if, in response to SWBT's inquiry,
                         Applicant does not immediately sign and return the
                         estimate to SWBT.

                    (2)  If Applicant timely notifies SWBT that it is electing
                         to treat SWBT's make-ready requirements as a denial of
                         access, SWBT shall, within 20 days after receiving the
                         notice, provide Applicant with a written statement
                         explaining its decision to grant access only if the
                         specified make-ready work is performed. The statement
                         shall be specific, shall include all relevant evidence
                         and information supporting SWBT's decision to grant
                         access only if the specified make-ready work is
                         performed, and shall explain how such evidence and
                         information relates to SWBT's decision for reasons of
                         lack of capacity, safety, reliability, or generally
                         applicable engineering purposes. The statement shall
                         also set forth the basis for SWBT's make-ready
                         proposals and specifically address SWBT's rationale for
                         rejecting Applicant's alternative written proposals, if
                         any.

     10.05 Performance of Make-ready Work. Except as otherwise specifically
provided in Section 10.02 and in this section, make-ready work shall be
performed by SWBT or by contractors, subcontractors, or other persons acting on
SWBT's behalf and shall be performed by SWBT in accordance with the same time
intervals which would be applicable if SWBT were performing the work for itself.

               (a)  Applicant and SWBT will mutually establish and maintain for
                    each SWBT construction district lists of authorized
                    contractors which may be selected by Applicant to perform
                    make-ready work when SWBT's interval for beginning or
                    completing such make-ready work does not meet Applicant's
                    needs. At Applicant's request, Applicant will be included on
                    such lists upon Applicant's demonstrating that (1) its
                    personnel are qualified to perform such work in accordance
                    with SWBT's specifications and (2) Applicant meets the
                    financial responsibility (insurance and bonding)
                    requirements generally applicable to contractors,
                    subcontractors, and other vendors performing the same or
                    similar work on SWBT's behalf or the self-insurance
                    requirements of Section 23.02.

               (b)  If SWBT's interval for beginning or completing make-ready
                    work does not meet Applicant's needs, Applicant may (1)
                    perform the make-ready work itself, if Applicant is on the
                    applicable list of authorized contractors at the time the
                    work is to be performed or (2) arrange for the work to be
                    performed by an authorized contractor selected by Applicant



                                    PAGE 54
<PAGE>   228

                    from the applicable list of authorized contractors. Subject
                    to the availability of personnel, Applicant may also request
                    that SWBT perform the work on an expedited basis; provided,
                    however, that make-ready work will not be performed on an
                    expedited basis unless Applicant first approves any overtime
                    or premium rates or charges associated with performance of
                    the work on an expedited basis.

               (c)  From time to time, additional contractors, subcontractors or
                    other vendors may be jointly approved by Applicant and SWBT
                    to perform specific make-ready work in the event that the
                    work load exceeds the capacity of the authorized contractors
                    on the approved list to perform the make-ready work in a
                    timely manner.

               (d)  Make-ready work performed by Applicant, by an authorized
                    contractor selected by Applicant, or by a contractor,
                    subcontractor, or other vendor jointly approved by the
                    parties under subsection (c) shall be performed in
                    accordance with SWBT's specifications and in accordance with
                    the same standards and practices which would be followed if
                    such excavation work were being performed by SWBT or SWBT's
                    contractors. Neither Applicant nor authorized contractors
                    selected by Applicant to perform make-ready work under this
                    section shall conduct such work in any manner which
                    jeopardizes or degrades the integrity of SWBT's structures
                    or interferes with any existing use of SWBT's facilities.
                    Applicant and any authorized contractor selected by
                    Applicant to perform make-ready work shall indemnify, on
                    request defend, and hold SWBT harmless from any and all
                    injuries, losses, damages, claims, or liabilities directly
                    resulting from their activities under this section.

               (e)  Nothing contained in this section authorizes Applicant, any
                    authorized contractor selected by Applicant, or any other
                    person acting on Applicant's behalf to consolidate SWBT's
                    cables.

     10.06 Multiple Applications. Applications shall be processed on a
first-come, first-served basis. Applications filed on the same date shall be
treated as having been filed simultaneously and shall be processed accordingly.

     10.07 Payments to Others for Expenses Incurred in Transferring or Arranging
Their Facilities. Applicant shall make arrangements with the owners of other
facilities attached to SWBT's poles or occupying space in SWBT's conduit system
regarding reimbursement for any expenses incurred by them in transferring or
rearranging their facilities to accommodate the attachment or placement of
Applicant's facilities to or in SWBT's poles, ducts, and conduits.

     10.08 Reimbursement for the Creation or Use of Additional Capacity. As a
result of facilities modification, capacity expansion, or other make-ready work
performed to 


                                    PAGE 55
<PAGE>   229

accommodate Applicant's facilities, additional capacity may become available on
SWBT's poles or in its conduit system. In such event, Applicant shall not have a
preferential right to utilize such additional capacity in the future and shall
not be entitled to any pole attachment or conduit occupancy fees subsequently
paid to SWBT for the use of such additional capacity. SWBT shall, however,
establish procedures for giving Applicant notice of the subsequent use by SWBT
or third parties of additional space or capacity created at Applicant's expense.
If SWBT utilizes additional space or capacity created at Applicant's expense,
SWBT will reimburse Applicant on a pro-rata basis for SWBT's share, if any, of
Applicant's capacity expansion costs, to the extent reimbursement is required by
the Pole Attachment Act and applicable rules, regulations, and commission
orders. If any third party later utilizes any such additional space or capacity,
SWBT shall, at the request of Applicant or such third party, provide such
information as may be available to SWBT to assist Applicant and such third party
in determining the amount, if any, which such third party may owe Applicant as
its pro-rata share of Applicant's capacity expansion costs. Nothing contained in
this section shall be construed as conferring or imposing on SWBT any right or
duty to determine the amounts owing by a third party to Applicant, to collect or
remit any such amounts to Applicant, to resolve or adjudicate disputes over
reimbursement between Applicant and third parties, to deny a third party access
to SWBT's poles, ducts, conduits, or rights-of-way due to such third party's
failure to satisfy Applicant's reimbursement demands, or to take any other
action to enforce Applicant's reimbursement rights against any third party. In
like manner, for additional capacity created by SWBT from and after the date of
enactment of the Telecommunications Act of 1996, SWBT shall be entitled to
recover from Applicant and third parties, to the full extent permitted by law,
their pro-rata shares of such capacity expansion costs incurred by SWBT. To the
extent that either party seeks to avail itself of this cost-saving mechanism,
such party shall be responsible for maintaining adequate records documenting the
costs subject to reimbursement, including but not limited to costs incurred for
facilities modification and capacity expansion work performed directly by such
party or contractors performing work on such party's behalf.

     10.09 License and Attachment. After all required make-ready work is
completed, SWBT will issue a license confirming that Applicant may attach
specified facilities to SWBT's poles or place specified facilities in SWBT's
conduit system. Applicant shall have access to attach or place only those
facilities specifically described in licenses subject to this Agreement, and no
others, except as otherwise specifically provided in (a) Sections 8.03 and 12.03
or other provisions of this Agreement, (b) any other written agreement between
the parties providing for such access, or (c) the provisions of any applicable
tariffs or commission orders.

              ARTICLE 11:  CONSTRUCTION OF APPLICANT'S FACILITIES

     11.01 Responsibility for Attaching and Placing Facilities. Each party shall
be responsible for the actual attachment of its own facilities to SWBT's poles
and the placement of such facilities in SWBT's ducts, conduits, and
rights-of-way and shall be solely responsible for all costs and expenses
incurred by it or on its behalf in connection 


                                    PAGE 56
<PAGE>   230

with such activities. In this regard, each party and its contractors shall be
solely responsible for (a) paying all persons and entities who provide
materials, labor, access to real or personal property, or other goods or
services in connection with the construction and attachment of its facilities
and (b) directing the activities of all personnel acting on such party's behalf
while they are physically present on, within, or in the vicinity of SWBT's
poles, ducts, conduits, and rights-of-way.

     11.02 Construction Schedule. After the issuance of a license, Applicant
shall provide SWBT with an updated construction schedule and thereafter keep
SWBT informed of anticipated changes in the construction schedule. Construction
schedules received by SWBT shall be subject to the provisions of Article 28 of
this Agreement (Confidentiality of Information). Construction schedules required
by this section shall include, at a minimum, the following information:

               (a)  the name, title, business address, and business telephone
                    number of the manager responsible for construction of the
                    facilities;

               (b)  the names of each contractor and subcontractor which will be
                    involved in the construction activities;

               (c)  the estimated dates when construction will begin and end;
                    and

               (d)  the approximate dates when Applicant or personnel working on
                    Applicant's behalf will be performing construction work in
                    connection with the attachment of Applicant's facilities to
                    SWBT's poles or the placement of Applicant's facilities in
                    any part of SWBT's conduit system.

                    ARTICLE 12:  USE AND ROUTINE MAINTENANCE
                            OF APPLICANT'S FACILITIES

     12.01 Use of Applicant's Facilities. Each license subject to this Agreement
authorizes Applicant to have access to Applicant's facilities on or within
SWBT's poles, ducts, and conduits as needed for the purpose of serving
Applicant's customers.

     12.02 Routine Maintenance of Applicant's Facilities. Each license subject
to this Agreement authorizes Applicant to engage in routine maintenance of
facilities located on or within SWBT's poles, ducts, and conduits. Routine
maintenance does not include the replacement or modification of Applicant's
facilities in any manner which results in Applicant's facilities differing
substantially in size, weight, or physical characteristics from the facilities
described in Applicant's license.

     12.03 Installation of Drive Rings and J-Hooks. Applicant may install drive
rings and J-hooks on SWBT's poles for the attachment of drop wires as specified
in this section.



                                    PAGE 57
<PAGE>   231

               (a)  Drive rings and J-hooks may be installed as specified in
                    pole attachment licenses issued to Applicant.

               (b)  If attachment space has already been licensed to Applicant
                    on a given SWBT pole, Applicant may install drive rings and
                    J-hooks within the space assigned to Applicant (typically
                    six inches above and six inches below Applicant's point of
                    attachment on the pole if the point of attachment is in the
                    center of the space assigned to Applicant) without applying
                    for or obtaining a new or amended license. No additional
                    attachment charges shall apply with respect to drive rings
                    and J-hooks installed in Applicant's licensed attachment
                    space.

               (c)  Applicant's first choice for placement of drive rings and
                    J-hooks shall be the licensed attachment space assigned to
                    Applicant as provided in subsection (b) above; provided,
                    however, that if attachment space already licensed to
                    Applicant on a given SWBT pole is not adequate for
                    Applicant's drive rings or J-hooks, Applicant may, when
                    necessary, and without applying for or obtaining a new or
                    amended license, install such drive rings and J-hooks above
                    or below Applicant's licensed attachment space as described
                    in subsection (b) above. No additional attachment charges
                    shall apply with respect to drive rings and J-hooks
                    installed outside Applicant's licensed attachment space as
                    permitted in this subsection.

               (d)  If Applicant has not already been licensed attachment space
                    on a given SWBT pole, Applicant may, when necessary, install
                    drive rings and J-hooks to unassigned space on such pole
                    without first obtaining a license for such attachment and
                    shall, promptly following such installation, notify SWBT of
                    the attachment. Such notification shall be made on a form to
                    be developed by SWBT for this purpose and shall constitute
                    an application for a license. Such application may be
                    conditionally granted without a pre-license survey or other
                    inquiry by SWBT, and SWBT shall not be required to process
                    the application, log the attachment as an assignment in its
                    outside plant records, or issue a permanent license for the
                    attachment unless specifically requested by Applicant to do
                    so; provided, however, that a conditionally granted
                    application under this subsection shall be subject to
                    revocation if it is subsequently determined that such
                    attachment has been made in violation of subsection (e) of
                    this section or other provisions of this Agreement.
                    Drive-rings and J-hooks installed pursuant to this
                    subsection are pole attachments and charges for such
                    attachments shall be determined in accordance with the Pole
                    Attachment Act and applicable rules, regulations, and
                    commission orders.


                                    PAGE 58
<PAGE>   232

               (e)  Notwithstanding the provisions of subsections (c)-(d) above,
                    Applicant may not install drive rings and J-hooks in space
                    assigned to SWBT or another joint user without the approval
                    of SWBT or such other joint user and may not install drive
                    rings and J-hooks in unassigned space in any manner which
                    will block or preclude the subsequent occupancy or use of
                    space by SWBT or other joint users. If the presence of
                    Applicant's facilities in space not assigned to Applicant
                    will block or preclude the use of assigned or otherwise
                    assignable space by SWBT or other joint users, Applicant
                    shall, on SWBT's request, promptly relocate the facilities
                    in order to accommodate the facilities of other users and
                    shall bear all expenses associated with such relocation.

               (f)  SWBT may not install drive rings or J-hooks in space
                    assigned to Applicant without Applicant's approval and
                    shall, at Applicant's request, and at SWBT's expense,
                    promptly relocate or, if necessary, remove, any drive rings
                    or J-hooks installed in violation of this subsection. If
                    SWBT drive rings or J-hooks have been installed in space
                    subsequently assigned to Applicant, or if the presence of
                    SWBT drive rings or J-hooks blocks or precludes the use of
                    otherwise assignable space on SWBT's poles, SWBT shall, at
                    Applicant's request, relocate such facilities, if it is
                    feasible to do so, as make-ready work.

               (g)  Applicant shall, at the request of SWBT or another joint
                    user, at Applicant's expense, promptly relocate or, if
                    necessary, remove any drive rings and J-hooks placed on
                    SWBT's poles other than as permitted in this section.

     12.04 Short-term Use of Maintenance Ducts for Repair and Maintenance
Activities. Maintenance ducts shall be available, on a nondiscriminatory basis,
for short-term (not to exceed 30 days) non-emergency maintenance or repair
activities by any person or entity (including but not limited to SWBT,
Applicant, other local service providers, and other joint users) with facilities
in the conduit section in which the maintenance duct is located; provided,
however, that use of the maintenance duct for non-emergency maintenance and
repair activities must be scheduled by SWBT. A person or entity using the
maintenance duct for non-emergency maintenance or repair activities shall
immediately notify SWBT of such use and must either vacate the maintenance duct
within 30 days or, with SWBT's consent, which consent shall not be unreasonably
withheld, rearrange its facilities to ensure that at least one full-sized
replacement maintenance duct (or, if the designated maintenance duct was an
inner duct, a suitable replacement inner duct) is available for use by all
occupants in the conduit section within 30 days after such person or entity
occupies the maintenance duct. Cables temporarily placed in the maintenance duct
on a non-emergency basis shall be subject to such accommodations as may be
necessary to rectify emergencies which may occur while the maintenance duct is
occupied.


                                    PAGE 59
<PAGE>   233

     12.05 Responsibility for Maintenance of Facilities. Each party shall be
solely responsible for maintaining its own facilities and (a) paying all persons
and entities who provide materials, labor, access to real or personal property,
or other goods or services in connection with the maintenance of such party's
facilities and (b) directing the activities of all such personnel while they are
physically present on, within, or in the vicinity of SWBT's poles, ducts,
conduits, and rights-of-way.

     12.06 Information Concerning the Maintenance of Applicant's Facilities.
Promptly after the issuance of a license, Applicant shall provide SWBT with the
name, title, business address, and business telephone number of the manager
responsible for routine maintenance of Applicant's facilities and shall
thereafter notify SWBT of changes to such information. The manager responsible
for routine maintenance of Applicant's facilities shall, on SWBT's request,
identify any contractor, subcontractor, or other person performing maintenance
activities on Applicant's behalf at a specified site.

              ARTICLE 13:  MODIFICATION OF APPLICANT'S FACILITIES

     13.01 Notification of Planned Modifications. Applicant shall notify SWBT in
writing at least 30 days before adding to, relocating, replacing or otherwise
modifying its facilities already attached to a SWBT pole or located in any SWBT
duct or conduit. The notice shall contain sufficient information to enable SWBT
to determine whether the proposed addition, relocation, replacement, or
modification is within the scope of Applicant's present license or requires a
new or amended license. No notice shall be required for such routine
modifications as the installation or placement of drive rings or J-hooks,
terminals, and other ancillary apparatus routinely used in providing service to
customers, having no effect on the structural integrity of SWBT's poles, ducts,
or conduits, and having no effect on the ability of SWBT or joint users to use
or have access to SWBT's poles, ducts, conduits, or rights-of-way.

     13.02 New or Amended License Required. A new or amended license will be
required if the proposed addition, relocation, replacement, or modification:

               (a)  requires that Applicant occupy additional space on SWBT's
                    poles (except on a temporary basis in the event of an
                    emergency);

               (b)  requires that Applicant occupy additional space (other than
                    space in the maintenance duct in accordance with Sections
                    12.04, 13.03, and 15.02 of this Agreement) in any SWBT duct
                    or conduit except on a temporary basis in the event of an
                    emergency;

               (c)  results in the facilities attached to SWBT's poles or placed
                    in SWBT's ducts or conduits being different from those
                    described in Applicant's current license (e.g., different
                    duct or size increase causing a need to recalculate storm
                    loadings, guying, or pole class); or


                                    PAGE 60
<PAGE>   234

               (d)  requires additional holding capacity on a permanent basis.

     13.03 Use of Maintenance Duct in Connection with Facility Modifications and
Replacements. Non-emergency access to the maintenance duct in connection with
facilities modifications and replacements shall be subject to the provisions of
Section 12.04 of this Agreement.

     13.04 Replacement of Facilities and Spinning/Overloading Additional Cables.
Applicant may replace existing facilities with new facilities occupying the same
pole, duct, or conduit space, and may spin or overlash additional cables to its
own existing facilities; provided, however, that such activities shall not be
considered to be routine maintenance and shall be subject to the requirements of
this article.

     13.05 Streamlined Procedures for the Issuance of Amended Licenses. SWBT may
streamline procedures for the issuance of amended licenses with respect to
proposed additions, relocations, replacements, or modifications of Applicant's
facilities when it appears to SWBT that the proposed additions, relocations,
replacements, or modifications will not require make-ready work by SWBT, will
not interfere with SWBT's use of its poles, conduit systems, or facilities
attached or connected thereto or contained therein, and will not interfere with
the use of existing facilities attached or connected thereto or contained
therein by joint users.

                       ARTICLE 14: REQUIRED REARRANGEMENTS
                            OF APPLICANT'S FACILITIES

     14.01 Notice of Planned Modifications. The parties acknowledge that the
Pole Attachment Act recites in part that "Whenever the owner of a pole, duct,
conduit, or right-of-way intends to modify or alter such pole, duct, conduit, or
right-of-way, the owner shall provide written notification of such action to any
entity that has obtained an attachment to such conduit or right-of-way so that
such entity may have a reasonable opportunity to add to or modify its existing
attachment." The parties further acknowledge that the FCC, in the First
Interconnection Order in CC Docket No. 96-98, recites that "... absent a private
agreement establishing notification procedures, written notification of a
modification must be provided to parties holding attachments on the facility to
be modified at least 60 days prior to the commencement of the physical
modification itself." This article is intended by the parties to alter the
above-described notification requirements only as provided in Section 14.02(b)
below.

     14.02 Required Rearrangement of Applicant's Facilities. Applicant
acknowledges that, from time to time, it may be necessary or desirable for SWBT
to rearrange facilities on or within its poles or conduit systems, change out
poles, add poles to a pole line, relocate or reconstruct poles, pole lines,
conduit segments, or conduit runs, enlarge manholes, reinforce conduit, or
otherwise modify poles, pole lines, or portions of its conduit system and that
such changes may be necessitated by SWBT's own business needs or by factors
outside of SWBT's control, such as the decision by a municipality to 


                                    PAGE 61
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widen streets or the decision by a third party to seek access to SWBT's poles,
ducts, conduits, or rights-of-way.

               (a)  Applicant agrees that Applicant will cooperate with SWBT and
                    joint users in making such rearrangements as may be
                    necessary to enable such changes to be made and that costs
                    incurred by Applicant in making such rearrangements shall,
                    in the absence of a specific agreement to the contrary, be
                    borne by the parties in accordance with then applicable
                    statutes, rules, regulations, and commission orders,
                    including the Pole Attachment Act, rules, regulations, and
                    commission orders thereunder.

               (b)  Whenever feasible, SWBT shall give Applicant not less than
                    60 days prior written notice of the need for Applicant to
                    rearrange its facilities pursuant to this section. The
                    notice shall state the date by which such rearrangements are
                    to be completed. Applicant shall complete such
                    rearrangements within the time prescribed in the notice.
                    SWBT may request that such modification be made within a
                    shorter period of time, in which event Applicant shall not
                    refuse to comply such request without due cause and
                    justification. In determining due cause and justification,
                    the following factors, among others, may be considered:

                    (1)  the circumstances under which the rearrangements are
                         sought (e.g., street-widening project, request by a
                         competing provider for access);

                    (2)  the timeliness of SWBT's request to Applicant;

                    (3)  the nature and number of rearrangements sought;

                    (4)  the impact on the ability of the parties and joint
                         users to meet customer service needs; and

                    (5)  risks of service interruption to customers of the
                         parties and joint users.

               (c)  Nothing contained in this article shall preclude Applicant
                    from advising SWBT, within 60 days from the date of the
                    notice, of its desire to add to or modify its existing
                    attachment.

              ARTICLE 15:  EMERGENCY REPAIRS AND POLE REPLACEMENTS

     15.01 Applicability. The parties acknowledge that in the event of an
emergency, services provided by the parties and joint users to their respective
customers may be interrupted, that it may not be possible for all service
providers with facilities attached to SWBT's poles or placed in SWBT's ducts,
conduits, or rights-of-way to restore service to all customers at the same time,
that disputes may arise between the parties concerning the 


                                    PAGE 62
<PAGE>   236

manner in which emergency repairs shall be made, that it is essential that
decisions be made quickly, and that it is highly desirable that all service
providers utilizing SWBT's poles, ducts, conduits, and rights-of-way enter into
appropriate arrangements relating to emergency repairs and service restoration.
In the absence of prearranged agreements, it is expected that disputes will be
immediately resolved at the site by the affected parties present based upon the
criteria set forth in Section 15.05 of this Agreement. The provisions of this
article shall apply in the absence of more comprehensive agreements relating to
emergency repairs.

     15.02 Responsibility for Emergency Repairs; Access to Maintenance Duct. In
general, each party shall be responsible for making emergency repairs to its own
facilities and for formulating appropriate plans and practices enabling such
party to make such repairs.

               (a)  Nothing contained in this Agreement shall be construed as
                    requiring either party to perform any repair or service
                    restoration work of any kind with respect to the other
                    party's facilities or the facilities of joint users.

               (b)  Maintenance ducts shall be available, on a nondiscriminatory
                    basis, for emergency repair activities by any person or
                    entity (including but not limited to SWBT, Applicant, other
                    local service providers, and other joint users) with
                    facilities in the conduit section in which the maintenance
                    duct is located; provided, however, that a person or entity
                    using the maintenance duct for emergency repair activities
                    shall immediately notify SWBT of such use and must either
                    vacate the maintenance duct within 30 days or, with SWBT's
                    consent, which consent shall not be unreasonably withheld,
                    rearrange its facilities to ensure that at least one
                    full-sized replacement maintenance duct (or, if the
                    designated maintenance duct was an inner duct, a suitable
                    replacement inner duct) is available for use by all
                    occupants in the conduit section within 30 days after such
                    person or entity occupies the maintenance duct. The parties
                    agree not to exceed 30 days' use except in unusual
                    emergencies that may require longer than 30 days to rectify.

               (c)  If necessary, other unoccupied ducts or inner ducts may be
                    used on a short-term basis when the maintenance duct is
                    unavailable. Any such use shall be subject to the same rules
                    applicable to the maintenance duct and shall be subject to
                    the rights of any party or joint user to whom such duct or
                    inner duct has been assigned.

     15.03 Designation of Emergency Repair Coordinators and Other Information.
For each SWBT construction district, Applicant shall provide SWBT with the
emergency contact number of Applicant's designated point of contact for
coordinating the handling of emergency repairs of Applicant's facilities and
shall thereafter notify SWBT of changes to such information.

                                    PAGE 63
<PAGE>   237

     15.04 Reporting of Conditions Requiring Emergency Repairs. As a courtesy,
each party shall endeavor to notify the other party at the earliest practicable
opportunity after discovering any condition on or in any of SWBT's poles, ducts,
conduits, or rights-of-way requiring emergency repairs to the other party's
facilities.

     15.05 Order of Precedence of Work Operations; Access to Maintenance Duct
and Other Unoccupied Ducts in Emergency Situations. When notice and coordination
are practicable, SWBT, Applicant, and other affected parties shall coordinate
repair and other work operations in emergency situations involving service
disruptions. Disputes will be immediately resolved at the site by the affected
parties present in accordance with the following principles.

               (a)  Emergency service restoration work requirements shall take
                    precedence over other work operations.

               (b)  Except as otherwise agreed upon by the parties, restoration
                    of lines for emergency services providers (e.g., 911, fire,
                    police, and hospital lines) shall be given the highest
                    priority and temporary occupancy of the maintenance duct
                    (and, if necessary, other unoccupied ducts) shall be
                    assigned in a manner consistent with this priority.
                    Secondary priority shall be given to restoring services to
                    the local service providers with the greatest numbers of
                    local lines out of service due to the emergency being
                    rectified. The parties shall exercise good faith in
                    assigning priorities, shall base their decisions on the best
                    information then available to them at the site in question,
                    and may, by mutual agreement at the site, take other factors
                    into consideration in assigning priorities and sequencing
                    service restoration activities.

               (c)  SWBT shall determine the order of precedence of work
                    operations and assignment of duct space in the maintenance
                    duct (and other unoccupied ducts) only if the affected
                    parties present are unable to reach prompt agreement;
                    provided, however, that these decisions shall be made by
                    SWBT on a nondiscriminatory basis in accordance with the
                    principles set forth in this section.

     15.06 Unilateral Corrective Action. When either party reasonably believes
that, due to the condition of the other party's facilities placed on, within, or
in the vicinity of SWBT's poles, ducts, conduits, or rights-of-way, there is an
immediate or imminent threat to the safety or health of employees or any other
person, to the physical integrity or functioning of either party, or either
party's ability to meet its service obligations, either party may unilaterally
perform such limited corrective work as may be necessary to prevent or mitigate
against the injury threatened. For example, if facilities of the other party
have become detached or partially detached from a pole, or detached or
partially detached

                                    PAGE 64
<PAGE>   238

from supporting racks or wall supports within a manhole, either party
may reattach them as provided in this section but shall not be obligated to do
so.

               (a)  Before performing any corrective work involving facilities
                    of the other party, SWBT or Applicant shall first attempt to
                    notify the other party. After such notice has been given,
                    the parties shall coordinate corrective work.

               (b)  When an emergency situation exists such that advance notice
                    and coordination are not practicable, either party may
                    perform corrective work without first giving notice to the
                    other party and shall promptly notify the other party of the
                    corrective work performed and the reason why notice was not
                    given.

     15.07 Emergency Pole Replacements. Applicant will cooperate fully with SWBT
when emergency pole replacements are required.

               (a)  When emergency pole replacements are required, SWBT shall
                    promptly make a good faith effort to contact Applicant to
                    notify Applicant of the emergency and to determine whether
                    Applicant will respond to the emergency in a timely manner.

               (b)  If notified by SWBT that an emergency exists which will
                    require the replacement of a pole, Applicant shall transfer
                    its facilities immediately, provided such transfer is
                    necessary to rectify the emergency. If the transfer is to a
                    SWBT replacement pole, the transfer shall be in accordance
                    with SWBT's placement instructions.

               (c)  If Applicant is unable to respond to the emergency situation
                    immediately, Applicant shall so advise SWBT and thereby
                    authorize SWBT (or any joint user sharing the pole with
                    SWBT) to perform such emergency-necessitated transfers (and
                    associated facilities rearrangements) on Applicant's behalf.

     15.08 Expenses Associated with Emergency Repairs. Each party shall bear all
reasonable expenses arising out of or in connection with emergency repairs of
its own facilities and transfers or rearrangements of such facilities associated
with emergency pole replacements made in accordance with the provisions of this
article.

               (a)  Each party shall be solely responsible for paying all
                    persons and entities who provide materials, labor, access to
                    real or personal property, or other goods or services in
                    connection with any such repair, transfer, or rearrangement
                    of such party's facilities.

                                    PAGE 65
<PAGE>   239

               (b)  Applicant shall reimburse SWBT for the costs incurred by
                    SWBT for work performed by SWBT on Applicant's behalf in
                    accordance with the provisions of this article; provided,
                    however, that when the costs incurred by SWBT are for work
                    performed in part for Applicant and in part for SWBT and
                    third parties, Applicant shall only reimburse SWBT for
                    Applicant's pro-rata share of the costs.

           ARTICLE 16:  INSPECTION BY SWBT OF APPLICANT'S FACILITIES

     16.01 SWBT's Right to Make Periodic or Spot Inspections. SWBT shall have
the right, but not the duty, to make periodic or spot inspections at any time of
any or all facilities attached to SWBT's poles or placed within SWBT's poles,
ducts, conduits, or rights-of-way. Inspections of Applicant's facilities may be
conducted for the purpose of determining whether facilities attached to SWBT's
poles or placed in SWBT's conduit system are in compliance with the terms of
this Agreement and conform to licenses subject to this Agreement. Charges for
inspections shall be allocated among all parties benefiting from the inspection
in accordance with the Pole Attachment Act and applicable rules, regulations,
and commission orders. When an inspection is conducted for the specific purpose
of auditing or investigating Applicant's compliance with this Agreement, SWBT
may charge Applicant for inspection expenses only if the inspection reflects
that Applicant is in substantial noncompliance with the terms of this Agreement.
If the inspection reflects that Applicant's facilities are not in compliance
with the terms of this Agreement, Applicant shall bring its facilities into
compliance promptly after being notified of such noncompliance and shall notify
SWBT in writing when the facilities have been brought into compliance.

     16.02 Report of Inspection Results. SWBT will provide Applicant the results
of any inspection of Applicant's facilities performed under Section 16.01 of
this Agreement.

     16.03 Post-installation Inspections. This article does not apply to
post-installation inspections performed as part of a pre-license survey in those
cases when Applicant has occupied space on or in SWBT's poles, ducts, conduits,
or rights-of-way prior to the issuance of a license pursuant to Section 8.03 of
this Agreement.

                      ARTICLE 17: TAGGING OF FACILITIES AND
                            UNAUTHORIZED ATTACHMENTS

     17.01 Facilities to Be Marked. Applicant shall tag or otherwise mark all of
Applicant's facilities placed on or in SWBT's poles, ducts, conduits, and
rights-of-way in a manner sufficient to identify the facilities as Applicant's
facilities.

     17.02 Removal of Untagged Facilities. Subject to the provisions of
subsections (a)-(d) of this section, SWBT may, without notice to any person or
entity, remove from SWBT's poles or any part of SWBT's conduit system any
untagged or unmarked facilities, including any such facilities owned or used by
Applicant, if SWBT determines 

                                    PAGE 66
<PAGE>   240

that such facilities are not the subject of a current license authorizing their
continued attachment to SWBT's poles or occupancy of SWBT's conduit system and
are not otherwise lawfully present on SWBT's poles or in SWBT's conduit system.

               (a)  Before removing any such untagged or unmarked facilities,
                    SWBT shall first attempt to determine whether the facilities
                    are being used by Applicant or any other firm, are
                    authorized by any license subject to this Agreement, or are
                    otherwise lawfully present on SWBT's poles or in SWBT's
                    conduit system.

               (b)  SWBT shall not remove untagged or unmarked facilities which
                    are thought to be operational without first making
                    reasonable efforts to (1) determine the identity of the
                    owner or other person or entity thought to be responsible
                    for the facilities and (2) give advance written notice to
                    such person or entity.

               (c)  If the facilities appear to be facilities of Applicant
                    described in a current license or application subject to
                    this Agreement, SWBT shall give written notice to Applicant
                    requesting Applicant to tag or mark the facilities within 60
                    days and Applicant shall either tag the facilities within
                    the 60-day period, advise SWBT in writing of its schedule
                    for tagging the facilities, or notify SWBT in writing that
                    it disclaims ownership of or responsibility for the
                    facilities. If Applicant disclaims ownership of or
                    responsibility for the facilities, Applicant shall disclose
                    to SWBT the identity of the owner or other person or entity,
                    if any, thought by Applicant to be responsible for the
                    facilities.

               (d)  If the facilities appear to be facilities used by Applicant
                    but not subject to a current license granted under this
                    Agreement, the provisions of Sections 17.05-17.12 shall
                    apply.

     17.03 Verification That Presently Attached Facilities Are Subject to
Existing Licenses. Applicant warrants and represents that, to the best of its
information and belief, all facilities presently owned or used by Applicant and
attached to SWBT's poles or occupying space within any part of SWBT's conduit
system in this State have been disclosed to SWBT and are subject to current
licenses or are otherwise lawfully present on or in SWBT's poles, ducts, and
conduits. If Applicant determines that any such facilities are not the subject
of current licenses, Applicant shall so advise SWBT and promptly apply for
licenses for such facilities or remove the facilities from SWBT's poles or
conduits. Nothing contained in this section shall be construed as requiring
Applicant to make a field audit of its existing facilities to confirm the
licensing status of its facilities as a prerequisite to entering into this
Agreement.

     17.04 Updating of Plant Location Records. Applicant shall furnish SWBT,
upon request, with such information as may from time to time be necessary for
SWBT to 

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correct and update SWBT's pole and conduit maps and records, cable plat maps,
and other plant location records recording or logging assignments of pole, duct,
and conduit space.

     17.05 Notice to Applicant. If any of Applicant's facilities for which no
license is presently in effect are found attached to SWBT's poles or anchors or
within any part of SWBT's conduit system, SWBT, without prejudice to other
rights or remedies available to SWBT under this Agreement, and without prejudice
to any rights or remedies which may exist independent of this Agreement, shall
send a written notice to Applicant advising Applicant that no license is
presently in effect with respect to the facilities and that Applicant must,
within 60 days, respond to the notice as provided in Section 17.06 of this
Agreement.

     17.06 Applicant's Response. Within 60 days after receiving a notice under
Section 17.05 of this Agreement, Applicant shall acknowledge receipt of the
notice and submit to SWBT, in writing, either:

               (a)  a denial or disclaimer of ownership or other interest in the
                    facilities, together with an explanation of the factual and
                    claimed legal basis for such denial or disclaimer;

               (b)  a statement that the facilities are the subject of a current
                    license, together with an explanation of the factual and
                    claimed legal basis for Applicant's assertion that the
                    facilities are currently licensed, or a statement that no
                    license is required, and an explanation of the factual and
                    claimed legal basis for that assertion; or

               (c)  an application for a new or amended license with respect to
                    such facilities, together with a full and complete
                    explanation of the circumstances under which such facilities
                    were attached to, placed within, or allowed to remain on or
                    in SWBT's poles or any part of SWBT's conduit system. Such
                    explanation shall include, at a minimum, the following:

                    (1)  the date (or estimated date) when such facilities were
                         attached to SWBT's poles or placed in SWBT's conduit
                         system, and the factual basis supporting Applicant's
                         selection of such date (or estimated date); and

                    (2)  the factual basis for Applicant's assertion, if any,
                         that decisions to attach, place or allow the facilities
                         to remain on or in SWBT's poles or conduit system were
                         made in good faith and without intent to circumvent
                         SWBT's pole attachment or conduit occupancy licensing
                         requirements.



                                    PAGE 68
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     17.07 Denial or Disclaimer of Ownership or Other Interest.  Applicant's
submission to SWBT of a denial or disclaimer of ownership or other interest in
the facilities shall constitute Applicant's waiver of any objection Applicant
may have to SWBT's removal of the facilities.  Submission of such a denial or
disclaimer shall not be construed as an agreement by Applicant to pay any
charges associated with removal of the facilities and shall be deemed to be a
denial of any such responsibility; provided, however, that nothing contained in
this section shall prohibit SWBT from invoking the dispute resolution process
or filing suit, in a court of competent jurisdiction, to establish that
Applicant is liable to SWBT for the costs of removal notwithstanding its denial
or disclaimer.

     17.08 Review by SWBT of Licensing Status.  Within 15 business days after
receiving Applicant's statement that the facilities are the subject of a
current license or that no license is required, SWBT shall review Applicant's
explanation of the factual and claimed legal basis for Applicant's assertions
and shall advise Applicant, in writing, whether it agrees or disagrees with
Applicant's assertions.  If SWBT agrees with Applicant's assertions, the
parties may amend the applicable license and no further action shall be
required of Applicant.  If SWBT does not accept Applicant's position, Applicant
shall, within 15 business days, apply for a new or amended license as provided
by Section 17.06(c) of this Agreement.

     17.09 Approval of License and Retroactive Charges.  If SWBT approves
Applicant's application for a new or amended license, Applicant shall be liable
to SWBT for all fees and charges associated with the unauthorized attachments
as specified in Section 17.10 of this Agreement.  The issuance of a new or
amended license as provided by this article shall not operate retroactively or
constitute a waiver by SWBT of any of its rights or privileges under this
Agreement or otherwise.

     17.10 Fees and Charges.  This section applies to fees and charges with
respect to Applicant's facilities placed on or in SWBT pole, duct, or conduit
space which has not been assigned to Applicant.  Applicant shall be liable to
SWBT for all fees and charges associated with any such unauthorized pole
attachments or conduit occupancy for which it is responsible.  Attachment and
occupancy fees and charges shall continue to accrue until the unauthorized
facilities are removed from SWBT's poles or conduit system and shall include,
but not be limited to, all fees and charges which would have been due and
payable if Applicant and its predecessors had continuously complied with all
applicable SWBT licensing requirements.  Such fees and charges shall be due and
payable 30 days after the date of the bill or invoice stating such fees and
charges.  The parties shall engage in good faith discussions to reach a
mutually agreed determination as to the amount due and owing.  In some cases,
it may be impractical, unduly difficult, or uneconomical to determine the
actual amount of fees which would have been due and payable if all licensing
requirements had been met.  Therefore, if the parties, through good faith
discussions fail to reach agreement on the amount due and owing, and if the
amount due and owing cannot be determined due to Applicant's inability to
provide the information required to determine the correct amount, the amount
owing with respect to each
                                    PAGE 69

<PAGE>   243

unauthorized attachment or occupancy shall be equal to three times the annual
attachment and occupancy fees in effect on the date Applicant is notified by
SWBT of the unauthorized attachment or occupancy. Payment of such fees shall be
deemed liquidated damages and not a penalty. In addition, Applicant shall
rearrange or remove its unauthorized facilities at SWBT's request to comply with
applicable placement standards, shall remove its facilities from any space
occupied by or assigned to SWBT or another joint user, and shall pay SWBT for
all costs incurred by SWBT in connection with any facilities rearrangements,
modifications, or replacements necessitated as a result of the presence of
Applicant's unauthorized facilities.

     17.11 Removal of Unauthorized Attachments.  If Applicant does not apply
for a new or amended pole attachment license with respect to unauthorized
facilities within the specified period of time, or if such application is
received and specifically disapproved, SWBT shall by written notice request to
Applicant to remove its unauthorized facilities not less than 60 days from the
date of notice and Applicant shall remove the facilities within the time
specified in the notice; provided, however, that SWBT may request Applicant to
remove such facilities at an earlier date if such earlier removal is necessary
for reasons beyond SWBT's control.  If the facilities have not been removed
within the time specified in the notice, SWBT may, at SWBT's option, remove
Applicant's facilities at Applicant's expense.

     17.12 No Ratification of Unlicensed Attachments or Unauthorized Use of
SWBT's Facilities. No act or failure to act by SWBT with regard to any
unlicensed attachment or occupancy or unauthorized use of SWBT's facilities
shall be deemed to constitute a ratification by SWBT of the unlicensed
attachment or occupancy or unauthorized use, nor shall the payment by Applicant
of fees and charges for unauthorized pole attachments or conduit occupancy
exonerate Applicant from civil or criminal liability for any deliberate trespass
or other illegal or wrongful conduct in connection with the placement or use of
such unauthorized facilities.

                 ARTICLE 18:  REMOVAL OF APPLICANT'S FACILITIES

     18.01 Responsibility for Removing Facilities.  Applicant shall be
responsible for and shall bear all expenses arising out of or in connection
with the removal of its facilities from SWBT's poles, ducts, conduits, and
rights-of-way.  Such removals shall be performed in accordance with the
provisions of this article.

           (a)  When practicable, Applicant shall give SWBT at least 30 days' 
                advance notice in writing of its intent to remove facilities
                from any part of SWBT's conduit system and the proposed method
                of removal.  The notice shall include the locations of the
                facilities to be removed, the name and telephone number of the
                manager responsible for removal of the facilities, and the
                estimated dates when removal of the facilities will begin and
                end.

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<PAGE>   244

           (b)  Applicant shall, if requested by SWBT to do so, place a pull 
                mandrel (slug) through all or any specified part of the         
                duct which was occupied by Applicant.

           (c)  Except as otherwise agreed upon in writing by the parties, 
                Applicant must, after removing its facilities, plug all
                previously occupied ducts at the entrances to SWBT's manholes
                (if SWBT would itself plug the ducts under the same
                circumstances) in accordance with the standards set by
                SWBT for its own operations, provided that such standards have
                been communicated in writing to Applicant at least 60 days in
                advance of the removal of Applicant's facilities.

           (d)  Applicant shall be solely responsible for the removal of its 
                own facilities from SWBT's poles, ducts, conduits, and
                rights-of-way and for (1) paying all persons and
                entities which provide materials, labor, access to real or
                personal property, or other goods or services in connection
                with the removal of Applicant's facilities from SWBT's poles,
                ducts, conduits, or rights-of-way and (2) directing the
                activities of all such personnel while they are physically
                present on, within, or in the vicinity of SWBT's poles, ducts,
                conduits, or rights-of-way.

           (e)  When Applicant no longer intends to occupy space on a SWBT pole
                or in a SWBT duct or conduit, Applicant will provide written
                notification to SWBT that it wishes to terminate the license
                with respect to such space and will remove its facilities from
                the space described in the notice. Upon removal of Applicant's
                facilities, the license shall terminate and the space shall be
                available for reassignment.

     18.02 Removal of Facilities Not in Active Use.  At SWBT's request,
Applicant shall remove from SWBT's poles, ducts, conduits, and rights-of-way
any of Applicant's facilities which are no longer in active use; provided,
however, that Applicant shall not be required to remove such facilities when
due cause and justification exists for allowing them to remain in place.
Applicant shall not be required to remove retired or inactive (dead) cables
that have been overlashed by other facilities which remain in active use unless
removal expenses are paid by the person or entity requesting removal of such
facilities.  Applicant shall not be required to remove cables that would
require excavation to remove unless the person or entity requesting removal of
such cables bears the expenses of such excavation in a manner analogous to the
provisions of Section 10.02(c) of this Agreement.  Applicant shall not abandon
any of its facilities by leaving them on SWBT's poles, in SWBT's ducts,
conduits, or rights-of-way, at any location where they may block or obstruct
access to SWBT's poles or any part of SWBT's conduit system, or on any public
or private property (other than property owned or controlled by Applicant) in
the vicinity of SWBT's poles, ducts, conduits, or rights-of-way.

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<PAGE>   245

     18.03 Removal Following Termination of License.  Applicant shall remove
its facilities from SWBT's poles, ducts, conduits, or rights-of-way within 60
days, or within such other period of time as shall be mutually agreeable to the
parties, after termination of the license authorizing the attachment of such
facilities to SWBT's poles or the placement of such facilities in SWBT's ducts,
conduits, or rights-of-way.

     18.04 Removal Following Replacement of Facilities.  Applicant shall remove
facilities no longer in service from SWBT's poles or conduit system within 60
days, or within such other period of time as shall be mutually agreeable to the
parties, after the date Applicant replaces existing facilities on a pole or in
a conduit with substitute facilities on the same pole or in the same conduit;
provided, however, that removal of facilities from the maintenance duct shall
be governed by Sections 12.04, 13.03, and 15.02 of this Agreement and not by
this section.

     18.05 Removal to Avoid Forfeiture.  If the presence of Applicant's
facilities on SWBT's poles or in SWBT's ducts, conduits, or rights-of-way would
cause a forfeiture of the rights of SWBT to occupy the property where such
pole, duct, conduit, or right-of-way is located, SWBT will promptly notify
Applicant in writing and Applicant shall not, without due cause and
justification, refuse to remove its facilities within such time as may be
required to prevent such forfeiture.  SWBT will give Applicant not less than 60
days from the date of notice to remove Applicant's facilities unless prior
removal is required to prevent the forfeiture of SWBT's rights.  At Applicant's
request, the parties will engage in good faith negotiations with each other,
with joint users, and with third-party property owners and cooperatively take
such other steps as may be necessary to avoid the unnecessary removal of
Applicant's facilities in the face of a threatened forfeiture.

     18.06 Notice of Completion of Removal Activities.  Applicant shall give
written notice to SWBT stating the date on which the removal of its facilities
from SWBT's poles, ducts, conduits, and rights-of-way has been completed.
Charges shall continue to accrue with respect to such facilities until
Applicant's facilities have been removed, pull mandrels (slugs) have been
pulled if required by Section 18.01(b) of this Agreement, Applicant has plugged
all previously occupied ducts at the entrances to SWBT's manholes as required
by Section 18.01(c) of this Agreement, and the notice required by this section
has been given.

     18.07 Removal of Facilities by SWBT; Notice of Intent to Remove.  If
Applicant fails to remove its facilities from SWBT's poles, ducts, or conduits
in accordance with the provisions of Sections 18.01-18.06 of this Agreement,
SWBT may remove such facilities and store them at Applicant's expense in a
public warehouse or elsewhere without being deemed guilty of trespass or
conversion and without becoming liable to Applicant for any injury, loss, or
damage resulting from such actions.  SWBT shall give Applicant not less than 60
days prior written notice of its intent to remove Applicant's facilities
pursuant to this section.  The notice shall state:

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           (a)  the date when SWBT plans to commence removal of Applicant's
                facilities, and that Applicant may remove the facilities at
                Applicant's sole cost and expense at any time before the date
                specified;

           (b)  SWBT's plans with respect to disposition of the facilities
                removed; and

           (c)  that Applicant's failure to remove the facilities or make
                alternative arrangements with SWBT for removal and disposition
                of the facilities shall constitute an abandonment of the
                facilities and of any interest therein.

     18.08 Removal of Facilities by SWBT.  If SWBT removes any of Applicant's
facilities pursuant to this article, Applicant shall reimburse SWBT for SWBT's
costs in connection with the removal, storage, delivery, or other disposition
of the removed facilities.

     18.09 Reattachment or Subsequent Attachment Following Removal.  After
Applicant's facilities have been properly removed pursuant to the provisions of
this article, neither the removed facilities nor replacement facilities shall
be attached to SWBT's poles or placed in SWBT's conduit system until Applicant
has first submitted new applications for the facilities and complied with the
provisions of this Agreement.

                 ARTICLE 19:  RATES, FEES, CHARGES, AND BILLING

     19.01 Rates, Charges and Fees Subject to Applicable Laws, Regulations,
Rules, and Commission Orders. All rates, charges and fees set forth in this
Agreement, including rates, charges and fees set forth in APPENDIX I (Schedule
of Rates, Fees, and Charges), shall be subject to all applicable federal and
state laws, rules, regulations, and commission orders, including but not limited
to (a) the Pole Attachment Act and rules, regulations, and commission orders
issued thereunder and (b) applicable orders of the State Commission in
interconnection arbitration proceedings.

     19.02 Schedule of Rates, Fees, and Charges.  SWBT's current schedule of
rates, fees, and charges is attached to this Agreement as APPENDIX I and
incorporated herein as an integral part of this Agreement.

     19.03 Pole Attachment and Conduit Occupancy Fees.  Until such time as the
FCC authorizes the charging of different rates to cable television systems and
telecommunications carriers, SWBT's annual rates for access to poles, ducts,
conduits, and rights-of-way shall be the same for cable television systems and
telecommunications carriers.  For all attachments to SWBT's poles and occupancy
of SWBT's ducts and conduits, Applicant will pay SWBT's semiannual pole
attachment and conduit occupancy fees as specified in APPENDIX I.  Pole
attachment and conduit occupancy fees shall be assessed and billed with respect
to (a) occupied space whether or not subject to a current license and (b)
assigned space as well as occupied space.  Fees for pole attachments shall 

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be based on the number of Applicant's pole attachments as of the date of billing
by SWBT and shall be calculated in accordance with applicable FCC rules,
regulations, and orders.  Fees for conduit occupancy shall be based on the
number of duct feet occupied by or assigned to Applicant as of the date of
billing by SWBT and shall be calculated in accordance with applicable FCC
rules, regulations, and orders.

     19.04 Billing for and Payment of Pole Attachment and Conduit Occupancy
Fees.  Pole Attachment and conduit occupancy fees under this Agreement and
licenses subject to this Agreement shall be payable semiannually in advance.

           (a)  Bills shall be submitted to Applicant for two semiannual 
                billing periods, the first period including charges for the 
                months of January through June and the second including 
                charges for the months of July through December.

           (b)  Charges associated with newly licensed pole attachments and 
                conduit occupancy shall be prorated on a daily basis and billed 
                with the next semiannual bill.

           (c)  Charges shall be adjusted and retroactively prorated on a daily 
                basis following the removal of Applicant's facilities and shall 
                be retroactively adjusted as a credit on the next semiannual 
                bill.

     19.05 Application Fees.  SWBT does not currently charge application fees
in connection with requests for access to poles, ducts, conduits, and
rights-of-way.  SWBT does, however, impose charges, on a case-by case basis,
for work performed in processing applications for access and preparing SWBT's
poles, ducts, conduits, and rights-of-way to accommodate the facilities of
parties seeking access.

     19.06 Charges for Pre-license Survey Work.  Subject to applicable
commission orders, Applicant will pay SWBT's charges for pre-license survey
work associated with the processing of Applicant's request for access.  SWBT's
pre-license survey charges are not set on a fixed fee basis and will vary from
case-to-case depending on such factors as the number and location of the poles,
ducts, conduits, and rights-of-way subject to Applicant's access request, the
completeness and quality of information submitted by the Applicant in its
application, the nature of the facilities to be placed by Applicant, and the
nature and extent of facilities modification, capacity expansion, and
make-ready work proposed by Applicant.

     19.07 Charges for Facilities Modifications, Capacity Expansions, and
Make-ready Work.  Subject to applicable commission orders, Applicant will pay
SWBT's charges for facilities modification, capacity expansion, and make-ready
work performed by SWBT, or by persons acting on SWBT's behalf, as provided in
other provisions of this Agreement and APPENDIX I.

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     19.08 Contract Administration Fee.  Subject to applicable commission
orders, SWBT may charge Applicant a one-time contract administration as
provided in APPENDIX I.  This fee, if applicable, shall be assessed for work
performed in the initial processing of this Agreement and shall be
non-refundable upon acceptance of this Agreement by SWBT.

     19.09 Administrative Record-keeping Fees.  Subject to applicable
commission orders, SWBT may charge Applicant cost-based administrative
record-keeping fees (e.g., fees associated with records and billing changes
resulting from the sale, consolidation, or other transfer of Applicant's
business or facilities, name changes, and the like) as provided in APPENDIX I.

     19.10 Charges for Work Performed by SWBT Employees.  Except as otherwise
specifically required by applicable commission orders, SWBT's charges to
Applicant for worked performed by SWBT employees pursuant to this Agreement
shall be computed by multiplying the fully loaded hourly rates for such
employees times the number of hours required to perform the work.  Disputes
over SWBT's charges for work performed by SWBT employees, including disputes
between the parties concerning the number of hours required to perform the
work, shall be subject to the dispute resolution procedures of Article 30.
Notwithstanding the execution of this Agreement, Applicant shall have the right
to challenge the methodology utilized by SWBT to determine hourly rates for
SWBT employees at any time in any forum having jurisdiction over the subject
matter.

     19.11 Due Date for Payment, Interest on Past Due Invoices, Remedies for
Non-payment and Procedures for Disputing Charges.  For fees and charges other
than charges for make-ready work, each bill or invoice submitted by SWBT to
Applicant shall state the date that payment is due, which date shall be not
less than 60 days after the date of the bill or invoice.  Applicant will pay
each such bill or invoice on or before the stated due date.  For make-ready
work, the payment due date shall be not less than 30 days after the date of the
bill or invoice.

           (a)  Interest on past due bills and invoices shall accrue at the 
                rate of 12% per annum, or the maximum rate allowed by law, 
                whichever is less.

           (b)  Applicant's failure to pay SWBT's fees and charges shall be 
                grounds for terminating this Agreement and licenses subject to
                this Agreement.

           (c)  If Applicant fails to pay, when due, any fees or charges billed 
                to Applicant under this Agreement, and any portion of such fees
                or charges remains unpaid more that 15 calendar days after the
                due date, SWBT may send Applicant a written notice advising
                Applicant that this Agreement, or specified licenses subject to
                this Agreement, may be terminated if such fees or charges are
                not paid within 15 calendar days after the date of the notice.
                Applicant must remit to SWBT all such unpaid fees or charges,
                whether disputed or undisputed, within 15 days 


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                after the date of the notice. If Applicant pays disputed fees
                under protest, and it is later determined that such fees or any
                portion thereof should be refunded, the portion of fees to be
                refunded shall be refunded with interest at the rate of 12% per
                annum or the maximum rate allowed by law, whichever is less.

           (d)  Applicant may dispute any fees or charges billed by SWBT to 
                Applicant under this Agreement by invoking the dispute
                resolution procedures set forth in Article 30 of this Agreement.

           (e)  If Applicant does not dispute such fees or charges and any 
                portion of such undisputed fees or charges remains unpaid 30
                calendar days after the date of the notice, SWBT may, to the
                extent permitted by the Pole Attachment Act and applicable
                rules, regulations, and commission orders, terminate this
                Agreement and licenses subject to this Agreement, suspend the
                processing of pending applications for access to SWBT's poles,
                ducts, conduits, and rights-of-way located in this State, and
                refuse to accept further applications for access until such
                undisputed fees or charges, together with accrued interest
                thereon, have been paid in full.

     19.12 Modification of Rates, Fees and Charges.  Subject to applicable
federal and state laws, rules, regulations, and commission orders, SWBT shall
have the right to modify all rates, charges and fees set forth in this
Agreement, including but not limited to those listed in APPENDIX I, as provided
in this section.

           (a)  Upon written notice to Applicant, SWBT may change, on a 
                going-forward basis, the amounts of any rates, fees or charges
                assessed under this Agreement. Pole attachment and conduit
                occupancy rates shall not be increased more than once annually.

                (1)  The notice shall state the effective date of the changes, 
                     which, in the event of a rate increase, shall be no earlier
                     than the 60th day after the notice is given.

                (2)  The changes shall be effective on the effective date 
                     stated in the notice unless stayed or prohibited by a 
                     court or agency of competent jurisdiction.

                (3)  The changes shall be reflected on the first semiannual 
                     bill issued on or after the effective date specified in the
                     notice.

           (b)  If the rates, fees and charges set forth in the notice are not 
                acceptable to Applicant, Applicant may, notwithstanding any
                other provisions of this Agreement, at Applicant's option (1)
                seek the renegotiation of this Agreement, (2) terminate this
                Agreement, or (3) seek relief through the 


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                dispute resolution process or before a court or agency of
                competent jurisdiction.

     19.13 Disputes Over Charging Methodologies.  The parties acknowledge that
the Pole Attachment Act grants the FCC regulatory authority over the rates,
terms, and conditions of access to poles, ducts, conduits, and rights-of-way.
The parties further acknowledge that, as of the date of this Agreement, this
State has not elected to assume reverse preemptive regulatory authority over
such rates, terms, and conditions by certifying to the FCC that it has made
such election.  Accordingly, complaints concerning and challenges to SWBT's
charging methodologies shall be brought, in the first instance, before the FCC
in accordance with FCC procedural rules unless this State elects to preempt FCC
regulation of pole attachment rates, terms, and conditions of access; provided,
however, that nothing contained in this section shall be construed as affecting
the right of either party to seek relief from any court or agency of competent
jurisdiction in connection with the negotiation, arbitration, and approval of
interconnection agreements under 47 U.S.C. Section  252.

                   ARTICLE 20:  PERFORMANCE AND PAYMENT BONDS

     20.01 Bond May Be Required.  SWBT may require Applicant, authorized
contractors, and other persons acting on Applicant's behalf to execute
performance and payment bonds (or provide other forms of security) in amounts
and on terms sufficient to guarantee the performance of their respective
obligations arising out of or in connection with this Agreement only as
provided in subsections (a)-(b) of this section and Section 20.02.  Bonds shall
not be required for entities meeting all self-insurance requirements of Section
23.02 of this Agreement.

           (a)  If Applicant elects to perform make-ready or facilities 
                modification work under Section 6.08(c) or Sections 10.02-10.05
                of this Agreement, SWBT may require Applicant, authorized
                contractors, and other persons acting on Applicant's behalf to
                execute bonds equivalent to those which would be required by
                SWBT if the work had been performed by contractors,
                subcontractors, or other persons selected directly by SWBT. No
                bonds shall be required of Applicant, authorized contractors, or
                other persons acting on Applicant's behalf except in those
                situations where a bond would be required if the work were being
                performed on SWBT's behalf.

           (b)  No other bond shall be required of Applicant to secure 
                obligations arising under this Agreement in the absence of due
                cause and justification.

           (c)  If a bond or similar form of assurance is required of 
                Applicant, an authorized contractor, or other person acting on
                Applicant's behalf, Applicant shall promptly submit to SWBT, 
                upon request, adequate proof that the bond remains in full 
                force and effect and provide certification 

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                from the company issuing the bond that the bond will not be
                cancelled, changed or materially altered without first providing
                SWBT 60 days written notice.

           (d)  SWBT may communicate directly with the issuer of any bond 
                required by SWBT pursuant to this section to verify the terms of
                the bond, to confirm that the bond remains in force, and to make
                demand on the issuer for payment or performance of any
                obligations secured by the bond.

     20.02 Payment and Performance Bonds in Favor of Contractors and
Subcontractors.  Applicant shall be responsible for paying all employees,
contractors, subcontractors, mechanics, materialmen and other persons or
entities performing work or providing materials in connection with (a) the
performance of facilities modification, capacity expansion, or make-ready work
by Applicant, authorized contractors, or other persons acting on Applicant's
behalf under Sections 6.08(c) and 10.02-10.05 of this Agreement or (b) the
construction, attachment, use, inspection, maintenance, repair, rearrangement,
modification, and removal of any of Applicant's facilities attached or to be
attached to SWBT's poles or placed or to be placed within SWBT's ducts,
conduits, or rights-of-way.  In the event any claim or demand is made on SWBT
by any such employee, contractor, subcontractor, mechanic, materialman, or
other person or entity providing such materials or performing such work, SWBT
may require, in addition to any security provided under Section 20.01 of this
Agreement, that Applicant execute payment or performance bonds, or provide such
other security, as SWBT may deem reasonable or necessary to protect SWBT from
any such claim or demand.

                          ARTICLE 21:  INDEMNIFICATION

     21.01 Risks Associated with Outside Plant Operations.  The parties
acknowledge that SWBT's outside plant facilities include thousands of miles of
pole lines, conduits, and rights-of-way located on public and private property
throughout SWBT's service area, that SWBT cannot control or continuously monitor
activities that occur at these sites, and that the risks associated with outside
plant operations and facilities are not similar to the risks associated with
operations occurring inside SWBT's central offices and other secure SWBT
buildings and structures. The parties further acknowledge that the presence of
multiple firms on or in poles, ducts, conduits, and rights-of-way owned or
controlled by SWBT requires that liability risks be fairly allocated between the
parties and that it is the parties' intent to allocate such risks in a just,
reasonable, and nondiscriminatory manner which addresses known risks associated
with the outside plant environment and activities and conditions at outside
plant locations.

     21.02 Control of Premises.  Applicant acknowledges that its employees and
other persons acting on Applicant's behalf, and employees of joint users and
other persons acting on behalf of joint users, will be present, without
supervision or control by SWBT, and in many cases without SWBT's knowledge, on,
within, and in the vicinity of 

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SWBT's poles, ducts, conduits, and rights-of-way. During those times when
Applicant's employees and personnel are present at such sites, Applicant shall
be deemed, for the purpose of allocating liabilities between the parties, to be
an independent contractor in control of the premises except as otherwise
provided in this section. Although SWBT inspectors may be present at the site of
work being performed by Applicant or persons acting on Applicant's behalf, such
inspectors shall have no authority to direct Applicant or personnel acting on
Applicant's behalf concerning the method or manner by which the work is to be
performed, and the presence of a SWBT inspector shall not result in SWBT's being
deemed to be in control of the premises. When both parties are present and
performing work operations at a site subject to this section, SWBT and Applicant
shall be deemed to be jointly in control of the premises. When poles, ducts,
conduits, or rights-of-way occupy property owned by third parties, neither party
shall be deemed to be in control of the premises, except as otherwise provided
by law, at times when such party's work operations are not in progress. Work
operations shall be considered to be in progress from the time work commences
until such work is completed whether or not employees of a party or persons
acting on such party's behalf are actually present at the site.

     21.03 INDEMNITY AGAINST AND LIMITATIONS OF LIABILITY WITH RESPECT TO
CERTAIN NEGLIGENT ACTS AND OMISSIONS.  THIS ARTICLE INCLUDES PROVISIONS
INDEMNIFYING EACH PARTY FROM LIABILITIES ARISING OUT OF OR IN CONNECTION WITH
CERTAIN NEGLIGENT ACTS AND OMISSIONS OF SUCH PARTY.  THIS ARTICLE ALSO INCLUDES
PROVISIONS LIMITING THE LIABILITIES OF EACH PARTY ARISING OUT OF OR IN
CONNECTION WITH CERTAIN NEGLIGENT ACTS AND OMISSIONS OF SUCH PARTY.

     21.04 Indemnities Excluded.  Except as otherwise specifically provided in
this article, neither party (as an "indemnifying party") shall be required to
indemnify or defend the other party (as an "indemnified party") against, or
hold the indemnified party harmless from, any suit, claim, demand, loss,
damage, liability, fine, penalty, or expense arising out of:

           (a)  any breach by the indemnified party of any provision of this 
                Agreement or any breach by the indemnified party of the parties'
                interconnection agreement, if any;

           (b)  the violation of any law by any employee of the indemnified 
                party or other person acting on the indemnified party's behalf;

           (c)  willful or intentional misconduct or gross negligence committed 
                by any employee of the indemnified party or by any other person
                acting on the indemnified party's behalf; or

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           (d)  any negligent act or acts committed by any employee of the 
                indemnified party or other person acting on the indemnified
                party's behalf, if such negligent act or acts are the sole
                producing cause of the injury, loss, or damage giving rise to
                the suit, claim, demand, loss, damage, liability, fine, penalty,
                or expense for which indemnity is requested.

     21.05 Workplace Injuries.  The parties acknowledge that injuries may occur
at sites where work is being performed by or for either party and that primary
responsibility for preventing workplace injuries shall be placed on the party
controlling work operations at the site.  Workplace injuries may result from
any of variety of causes, including but not limited to electrocution associated
with contact with electric power lines on poles or use of defective equipment,
falls from poles resulting from the negligence of the injured person or
co-workers or due to the existence of unsafe conditions on or in the vicinity
of the pole, cave-ins and other accidents at excavation sites, explosion of
combustible gases within or in the vicinity of a conduit system, exposure to
hazardous substances or noxious gases at the site, acts of God, and acts and
omissions of third parties over whom neither party has control.  Except as
expressly provided in this Agreement to the contrary, each party shall
indemnify, on request defend, and hold the other party harmless from any and
all suits, claims, demands, losses, damages, liabilities, fines, penalties, or
expenses of every kind and character, on account of or in connection with any
injury, loss, or damage suffered by any person, which arises out of or in
connection with the personal injury or death of any employee of the
indemnifying party (or other person acting on the indemnifying party's behalf)
if such injury or death results, in whole or in part, from any occurrence or
condition on, within, or in the vicinity of SWBT's poles, ducts, conduits, and
rights-of-way; provided, however, that Applicant's indemnification duties under
this section shall arise only if the person injured is present at such site in
connection with the performance or anticipated performance of any act required
or permitted to be performed by Applicant or by persons acting on Applicant's
behalf pursuant to this Agreement.  Indemnities provided by this section shall
be subject to the exclusions set forth in Section 21.04 and include but are not
limited to indemnities arising out of or in connection with claims arising from
or in any way connected with any injury, sickness, disease, or death of any
employee of the indemnifying party or any person acting on the indemnifying
party's behalf attributable or allegedly attributable to occurrences or
conditions on, within, or in the vicinity of SWBT's poles, ducts, conduits, and
rights-of-way.  EXCEPT AS PROVIDED ABOVE IN SUBSECTIONS 21.04(c)-(d), THE
INDEMNIFYING PARTY'S INDEMNIFICATION OBLIGATIONS UNDER THIS SECTION SHALL ARISE
EVEN IF THE INJURY, SICKNESS, DISEASE, OR DEATH WAS ATTRIBUTABLE IN PART TO
NEGLIGENT ACTS OR OMISSIONS OF THE INDEMNIFIED PARTY.

     21.06 Other Claims Brought Against Either Party by Employees and Other
Persons Acting on the Other Party's Behalf.  Nothing contained in this
Agreement shall create any contractual liability or other liability on the part
of either party to any employee, contractor, or subcontractor of the other
party or any other person acting on the other party's behalf.  Each party shall
indemnify, on request defend, and hold the other 

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party harmless from any and all suits, claims, demands, losses, damages,
liabilities, or expenses of every kind and character (other than workplace
injury claims subject to Section 21.05 above) made, brought, or sought against
the indemnified party by any employee, contractor, or subcontractor of the
indemnifying party or by any other person acting on the indemnifying party's
behalf; provided, however, that this section shall apply only to suits, claims,
demands, losses, damages, liabilities, or expenses related to the subject matter
of this Agreement. Indemnities provided by this section shall be subject to the
exclusions set forth in Section 21.04 and include but are not limited to
indemnities arising out of or in connection with claims arising from or in any
way connected with the employment relationship or other claimed relationship
between the indemnifying party and the employee, contractor, subcontractor, or
other person acting on the indemnifying party's behalf; claims arising out of
disputes over payments due or allegedly due to any employee, contractor,
subcontractor, or other person acting on the indemnifying party's behalf; and
claims arising out of other contract disputes between the indemnifying party and
the employee, contractor, subcontractor, or other person acting on the
indemnifying party's behalf. EXCEPT AS PROVIDED ABOVE IN SUBSECTIONS
21.04(c)-(d), THE INDEMNIFYING PARTY'S INDEMNIFICATION OBLIGATIONS UNDER THIS
SECTION SHALL ARISE EVEN IF THE INJURY, LOSS, OR DAMAGE GIVING RISE TO THE
INDEMNIFICATION CLAIM WAS ATTRIBUTABLE IN PART TO NEGLIGENT ACTS OR OMISSIONS OF
THE INDEMNIFIED PARTY.

     21.07 Claims Brought Against Either Party by Vendors, Suppliers,
Customers, and other Persons in Privity of Contract with the Other Party.  The
parties acknowledge that neither party controls the contractual relationships
between the other party and vendors, suppliers, customers, and other persons in
privity of contract with the other party and that nothing contained in this
Agreement shall create any contractual or other liability of either party to
any vendor, supplier, customer, or other person or entity in privity of
contract with the other party.  Each party shall indemnify, on request defend,
and hold the other party harmless from any and all suits, claims, demands,
losses, damages, liabilities, or expenses of every kind and character, made,
brought, or sought against the indemnified party by any vendor, supplier, or
customer of the indemnifying party or by any other person or entity in privity
with the indemnifying party; provided, however, that this section shall apply
only to suits, claims, demands, losses, damages, liabilities, or expenses
related to the subject matter of this Agreement or Applicant's use of SWBT's
poles, ducts, conduits, or rights-of-way.  The indemnifying party may not, as a
defense to any obligations of the indemnifying party under this section, assert
that the indemnified party's claims against the indemnifying party are barred
by any tariff or contract limitation of liability applicable to the
indemnifying party's vendor, supplier, or customer or to such other person in
privity of contract with the indemnifying party.  Indemnities provided by this
section shall be subject to the exclusions set forth in Section 21.04 and
include but are not limited to indemnities for claims against either party
arising out of or in connection with the failure by the other party to meet its
obligations (including but not limited to contract and tariff
obligations) to such other party's customers and suppliers.  EXCEPT AS PROVIDED
ABOVE IN SUBSECTIONS 21.04(c)-(d), THE INDEMNIFYING PARTY'S INDEMNIFICATION
OBLIGATIONS UNDER THIS 

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SECTION SHALL ARISE EVEN IF THE INJURY, LOSS, OR DAMAGE GIVING RISE TO THE
INDEMNIFICATION CLAIM WAS ATTRIBUTABLE IN PART TO NEGLIGENT ACTS OR OMISSIONS OF
THE INDEMNIFIED PARTY.

     21.08 Claims Brought Against Either Party by Such Party's Own Employees,
Contractors, Subcontractors, or Other Persons Acting on Such Party's Behalf,
and Claims Brought Against Either Party by Such Party's Own Vendors, Suppliers,
Customers, or Other Persons in Privity of Contract with Such Party.  Neither
party shall be entitled to indemnity, contribution, or subrogation from or by
the other party with respect to any suits, claims, demands, losses, damages,
liabilities, or expenses, of any kind or character, made, brought, or sought
against such party by any employee, contractor, or subcontractor of such party,
by any other person acting on behalf of such party, by any vendor, supplier, or
customer of such party, or by any other person or entity in privity of contract
with such party, if such suit, claim, demand, loss, damage, liability, or
expense arises directly out of or in connection with the subject matter of this
Agreement or the use by Applicant of SWBT's poles, ducts, conduits, or
rights-of-way.  Indemnities excluded by this section include, but are not
limited to, indemnities for claims against either party arising out of or in
connection with employment-related disputes between either party and its
employees; claims against either party by contractors, subcontractors, and
suppliers performing work or supplying materials to SWBT sites at the request
of such party; and other failures by either party to meet its obligations
(including but not limited to contract and tariff obligations) to such party's
own customers and suppliers.  THE INDEMNIFICATION EXCLUSIONS OF THIS SECTION
SHALL APPLY EVEN IF THE INJURY, LOSS, OR DAMAGE GIVING RISE TO THE
INDEMNIFICATION CLAIM WAS ATTRIBUTABLE IN PART TO THE NEGLIGENT ACTS OR
OMISSIONS OF THE INDEMNIFYING PARTY BUT SHALL NOT APPLY IF THE INJURY, LOSS, OR
DAMAGE GIVING RISE TO THE INDEMNIFICATION CLAIM AROSE FROM WILLFUL OR
INTENTIONAL MISCONDUCT OR GROSS NEGLIGENCE COMMITTED BY ANY EMPLOYEE OF THE
INDEMNIFYING PARTY OR ANY OTHER PERSON ACTING ON THE INDEMNIFYING PARTY'S
BEHALF OR AROSE FROM ANY NEGLIGENT ACT OR ACTS COMMITTED BY ANY EMPLOYEE OF THE
INDEMNIFYING PARTY OR OTHER PERSON ACTING ON THE INDEMNIFYING PARTY'S BEHALF,
IF SUCH NEGLIGENT ACT OR ACTS ARE THE SOLE PRODUCING CAUSE OF THE INJURY, LOSS,
OR DAMAGE GIVING RISE TO THE SUIT, CLAIM, DEMAND, LOSS, DAMAGE, LIABILITY,
FINE, PENALTY, OR EXPENSE FOR WHICH INDEMNITY IS REQUESTED.

     21.09 Injuries to Third Parties and Third-party Property Owners Resulting
from the Parties' Conduct.  Each party shall indemnify, on request defend, and
hold the other party harmless from any and all suits, claims, demands, losses,
damages, liabilities, fines, penalties, or expenses, of every kind and
character, on account of or in connection with the personal injury or death of
any third party or physical damage to real or personal property owned by a
third party, arising, in whole or in part, out of or in connection with the
conduct of employees of the indemnifying party or other persons acting on the


                                    PAGE 82
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indemnifying party's behalf while such employees or other persons are present
on, within, or in the vicinity of any SWBT pole, duct, conduit, or right-of-way
in connection with the performance or anticipated performance of any act
required or authorized to be performed pursuant to this Agreement. Indemnities
provided by this section shall be subject to the exclusions set forth in Section
21.04 and include but are not limited to indemnities arising out of or in
connection with personal injury, death, and property damage claims by third
parties based on willful or intentional misconduct and negligent acts and
omissions of the indemnifying party.

     21.10 Indemnification for Environmental Claims.  The parties acknowledge
that hazardous substances may be present on, within, or in the vicinity of
SWBT's poles, ducts, conduits, or rights-of-way; that employees and other
persons acting on the parties' behalf working on, within, or in the vicinity of
SWBT's poles, ducts, conduits, or rights-of-way should be familiar with
environmental laws and environmental concerns which arise in outside plant
contexts; that all such employees and other persons should be prepared to
recognize and deal with environmental contingencies existing at specific sites;
and that liabilities associated with environmental claims arising out of or in
connection with the subject matter of this Agreement shall be allocated between
the parties as set forth in this section.

           (a)  Each party shall indemnify, on request defend, and hold the
                other party harmless from any and all suits, claims, demands,
                losses, damages, liabilities, fines, penalties, or expenses, of
                every kind and character, on account of or in connection with
                any injury, loss, or damage to any person or property, or to the
                environment, arising out of or in connection with the violation
                or breach, by any employee of the indemnifying party or other
                person acting on the indemnifying party's behalf, of (1) any
                federal, state, or local environmental statute, rule,
                regulation, ordinance, or other law or (2) any provision or
                requirement of this Agreement dealing with hazardous substances
                or protection of the environment.

           (b)  Each party shall indemnify, on request defend, and hold the 
                other party harmless from any and all suits, claims, demands,
                losses, damages, liabilities, fines, penalties, or expenses, of
                every kind and character, on account of or in connection with
                any injury, loss, or damage to any person or property, or to the
                environment, arising out of or in connection with the release or
                discharge, onto any public or private property, of any hazardous
                substances, regardless of the source of such hazardous
                substances, by any employee of the indemnifying party, or by any
                person acting on the indemnifying party's behalf, while present
                on, within, or in the vicinity of any SWBT pole, duct, conduit,
                or right-of-way. Indemnities provided by this subsection include
                but are not limited to indemnities arising out of or in
                connection with the release or discharge of water and other
                substances from SWBT's manholes or other conduit facilities.


                                    PAGE 83


<PAGE>   257


           (c)  Each party shall indemnify, on request defend, and hold the 
                other party harmless from any and all suits, claims, demands,
                losses, damages, liabilities, fines, penalties, or expenses, of
                every kind and character, on account of or in connection with
                any injury, loss, or damage to any person or property, or to the
                environment, arising out of or in connection with the removal or
                disposal of any hazardous substances by the indemnifying party
                or by any person acting on the indemnifying party's behalf, or
                arising out of or in connection with the subsequent storage,
                processing or other handling of such hazardous substances by any
                person or entity after they have been removed by the
                indemnifying party or persons acting on the indemnifying party's
                behalf from the site of any SWBT pole, duct, conduit, or
                right-of-way. For the purposes of this subsection, any person or
                entity removing or disposing of hazardous substances at the
                request of the indemnifying party or at the request of any
                person acting on the indemnifying party's behalf, and any person
                or entity subsequently receiving, storing, processing, or
                otherwise handling such hazardous substances shall be considered
                to be a person acting on the indemnifying party's behalf.

           (d)  Except as otherwise specifically provided in this section, 
                neither party shall be required to indemnify or defend the other
                party against, or hold the other party harmless from any loss,
                damage, claim, demand, suit, liability, fine, penalty or expense
                for which the other party may be liable under any federal,
                state, or local environmental statute, rule, regulation,
                ordinance, or other law.

     21.11 Miscellaneous Claims.  Applicant shall indemnify, on request defend,
and hold SWBT harmless from any and all suits, claims, demands, losses,
damages, liabilities, fines, penalties, and expenses, of every kind and
character, made, brought, or sought against SWBT by any person or entity,
arising out of or in connection with the subject matter of this Agreement and
based on either:

           (a)  claims for taxes, municipal fees, franchise fees, right-to-use 
                fees, and other special charges assessed on SWBT due to the
                placement or presence of Applicant's facilities on or within
                SWBT's poles, ducts, conduits, or rights-of-way; or

           (b)  claims based on the violation by Applicant of any third party's 
                intellectual property rights, including but not limited to
                claims for copyright infringement, patent infringement, or
                unauthorized use or transmission of television or radio
                broadcast programs or other program material.


                                    PAGE 84

<PAGE>   258

     21.12 Applicant's General Indemnity Obligations to SWBT.  This section
applies only in those situations not expressly covered by Sections 21.05-21.11
and does not apply to any suit, claim, demand, loss, damage, or expense
resulting from Applicant's enforcement of its rights against SWBT pursuant to
this Agreement or other provisions in the parties' interconnection agreement,
if any.  Except as otherwise expressly provided in this Agreement to the
contrary, and subject to the exclusions set forth in Section 21.04, Applicant
shall indemnify, on request defend, and hold SWBT harmless from any and all
suits, claims, demands, losses, damages, liabilities, fines, penalties, and
expenses, of every kind and character, on account of or in connection with any
injury, loss, or damage to any person or property, or to the environment,
arising out of or in connection with Applicant's access to or use of SWBT's
poles, ducts, conduits, or rights-of-way, Applicant's performance of any acts
authorized under this Agreement, or the presence or activities of Applicant's
employees or other personnel acting on Applicant's behalf on, within, or in the
vicinity of SWBT's poles, ducts, conduits, or rights-of-way.

     21.13 SWBT's General Indemnity Obligations to Applicant.  This section
applies only in those situations not expressly covered by Sections 21.05-21.10
and does not apply to any suit, claim, demand, loss, damage, or expense
resulting from SWBT's enforcement of its rights against Applicant pursuant to
this Agreement or other provisions in the parties' interconnection agreement,
if any.  Except as otherwise expressly provided in this Agreement to the
contrary, SWBT shall indemnify, on request defend, and hold Applicant harmless
from any and all suits, claims, demands, losses, damages, liabilities, fines,
penalties, and expenses, of every kind and character, on account of or in
connection with any injury, loss, or damage to any person or property, or to
the environment, arising out of or in connection with SWBT's access to or use
of SWBT's poles, ducts, conduits, or rights-of-way, SWBT's performance of any
acts authorized under this Agreement, or the presence or activities of SWBT's
employees or other personnel acting on SWBT's behalf on, within, or in the
vicinity of SWBT's poles, ducts, conduits, or rights-of-way.

     21.14 No Rights' Claims, Causes of Action, or Remedies for the Benefit of
Third Parties.  Nothing contained in this article is intended to create any
rights, claims, causes of action, or remedies for the benefit of any third
party.

     21.15 Assertion of Limitation of Liability Defenses.  Each party shall
diligently assert the limitation of liability provisions of any applicable
tariff or contract in any case involving injury, loss, or damage to any
customer of such party for which the other party is not exempt from
indemnification liabilities to the indemnified party under this Agreement.

     21.16 Indemnity Liabilities Not Subject to Article 22 Limitations of
Liability.  Indemnity liabilities under this article shall not be subject to
Article 22 limitations of liability.

     21.17 Defense of Suits.  Upon request by the indemnified party, the
indemnifying party shall defend any suit brought against the indemnified party
for any injury, loss, or 

                                    PAGE 85
<PAGE>   259

damage subject to indemnification under this Agreement. The indemnified party
shall notify the indemnifying party promptly in writing of any written claims,
lawsuits, or demands for which the indemnifying party may be responsible under
this Agreement. The indemnified party shall cooperate in every reasonable way to
facilitate defense or settlement. The indemnifying party shall have the right to
control and conduct the defense and settlement of any action or claim subject to
consultation of the indemnified party. The indemnifying party shall not be
responsible for any settlement unless the indemnifying party approved such
settlement in advance and agrees to be bound by the settlement agreement.

             ARTICLE 22:  LIABILITIES AND LIMITATIONS OF LIABILITY

     22.01 LIMITATIONS OF LIABILITY WITH RESPECT TO NEGLIGENT ACTS AND
OMISSIONS.  THIS ARTICLE INCLUDES PROVISIONS LIMITING THE LIABILITIES OF EACH
PARTY ARISING OUT OF OR IN CONNECTION WITH CERTAIN NEGLIGENT ACTS AND OMISSIONS
OF SUCH PARTY.

     22.02 LIMITATIONS OF LIABILITY IN GENERAL.  EXCEPT AS OTHERWISE EXPRESSLY
PROVIDED IN SECTIONS 21.16 AND 22.05, NEITHER PARTY'S LIABILITY TO THE OTHER
PARTY FOR DAMAGES ATTRIBUTABLE, IN WHOLE OR IN PART, TO ANY NEGLIGENT ACT OR
OMISSION IN THE PERFORMANCE OF THIS AGREEMENT, WHETHER ARISING IN CONTRACT OR
TORT, SHALL EXCEED IN THE AGGREGATE FOR ANY CALENDAR YEAR THE GREATER OF
$250,000, OR THE TOTAL AMOUNT CHARGED BY SWBT TO APPLICANT UNDER THIS AGREEMENT
FOR THE CALENDAR YEARS WHEN THE ACTS OR OMISSIONS GIVING RISE TO LIABILITY
OCCURRED.  NOTHING CONTAINED IN THIS SECTION SHALL BE CONSTRUED AS LIMITING
EITHER PARTY'S LIABILITY FOR ACTS OR OMISSIONS CONSTITUTING WILLFUL OR
INTENTIONAL MISCONDUCT OR GROSS NEGLIGENCE BY SUCH PARTY.

     22.03 EXCLUSION OF LIABILITY FOR SPECIAL, INDIRECT, OR CONSEQUENTIAL
DAMAGES.  NEITHER PARTY SHALL BE LIABLE TO THE OTHER PARTY FOR ANY INDIRECT,
SPECIAL, CONSEQUENTIAL, INCIDENTAL, OR PUNITIVE DAMAGES, INCLUDING BUT NOT
LIMITED TO LOSS OF ANTICIPATED PROFITS OR REVENUE OR OTHER ECONOMIC LOSS IN
CONNECTION WITH OR ARISING FROM ANY ACT OR FAILURE TO ACT PURSUANT TO THIS
AGREEMENT, EVEN IF THE OTHER PARTY HAS ADVISED SUCH PARTY OF THE POSSIBILITY OF
SUCH DAMAGES.  THIS SECTION LIMITS EACH PARTY'S LIABILITY FOR INDIRECT,
SPECIAL, CONSEQUENTIAL, INCIDENTAL, OR PUNITIVE DAMAGES ARISING OUT OF OR IN
CONNECTION WITH NEGLIGENT (INCLUDING GROSSLY NEGLIGENT) ACTS OR OMISSIONS OF
SUCH PARTY BUT DOES NOT LIMIT EITHER PARTY'S LIABILITY FOR INTENTIONAL
MISCONDUCT.


                                    PAGE 86

<PAGE>   260

     22.04 SWBT Not Liable to Applicant for Acts of Third Parties or Acts of
God. By affording Applicant access to poles, ducts, conduits, and rights-of-way
owned or controlled by SWBT, SWBT does not warrant, guarantee, or insure the
uninterrupted use of such facilities by Applicant. Except as specifically
provided in Section 22.05 of this Agreement, Applicant assumes all risks of
injury, loss, or damage (and the consequences of any such injury, loss, or
damage) to Applicant's facilities attached to SWBT's poles or placed in SWBT's
ducts, conduits, or rights-of-way, and SWBT shall not be liable to Applicant for
any damages to Applicant's facilities other than as provided in Section 22.05.
In no event shall SWBT be liable to Applicant under this Agreement for any
injury, loss, or damage resulting from the acts or omissions of (1) any joint
user or any person acting on a joint user's behalf, (2) any governmental body or
governmental employee, (3) any third-party property owner or persons acting on
behalf of such property owner, or (4) any licensee, invitee, trespasser, or
other person present at the site or in the vicinity of any SWBT pole, duct,
conduit, or right-of-way in any capacity other than as a SWBT employee or person
acting on SWBT's behalf. In no event shall SWBT be liable to Applicant under
this Agreement for injuries, losses, or damages resulting from acts of God
(including but not limited to storms, floods, fires, and earthquakes), wars,
civil disturbances, espionage or other criminal acts committed by persons or
entities not acting on SWBT's behalf, cable cuts by persons other than SWBT's
employees or persons acting on SWBT's behalf, or other causes beyond SWBT's
control which occur at sites subject to this Agreement.

     22.05 Damage to Facilities.  Except as otherwise specifically provided in
this section, neither party shall be liable to the other party for any injury,
loss, or damage (or for the direct or indirect consequences of any such injury,
loss, or damage) to such other party's facilities attached to SWBT's poles or
placed within or in the vicinity of SWBT's poles, ducts, conduits, or
rights-of-way.

           (a)  Each party (the "responsible party"), and persons acting on 
                behalf of the responsible party, shall exercise due care to
                avoid damaging the facilities of the other party (the "injured
                party"). In the event such damage occurs, the responsible party
                or persons acting on behalf of the responsible party shall
                immediately report such damages to the injured party, and the
                injured party shall promptly make such arrangements as may be
                necessary to restore service to its customers using the
                facilities affected.

           (b)  The responsible party shall reimburse the injured party for the 
                actual costs incurred by the injured party for repair of
                facilities damaged by the willful misconduct, grossly negligent
                acts, grossly negligent omissions, and negligent acts (but not
                negligent omissions other than grossly negligent omissions) of
                employees of the responsible party.

           (c)  The responsible party shall reimburse the injured party for the 
                actual costs incurred by the injured party for repair of 
                facilities damaged by the 

                                    PAGE 87
<PAGE>   261

                willful misconduct, grossly negligent acts or omissions, and
                negligent acts (but not negligent omissions other than grossly
                negligent omissions) of independent contractors acting on the
                responsible party's behalf; provided, however, that the injured
                party shall be limited to recovery of those costs which cannot
                be recovered from the independent contractor causing the
                damage. The responsible party shall not be liable to the
                injured party under this section until the injured party's
                claims against the independent contractor causing the damage
                have been adjudicated or settled and the amount of the injured
                party's claim against the responsible party is determinable.

           (d)  NEITHER PARTY SHALL BE REQUIRED BY
                THIS SECTION TO REIMBURSE THE OTHER PARTY FOR COSTS
                INCURRED AS A RESULT OF NEGLIGENT OMISSIONS OTHER THAN
                GROSSLY NEGLIGENT OMISSIONS COVERED BY SUBSECTIONS
                (c)-(d) OF THIS SECTION.

           (e)  THIS SECTION LIMITS, BUT DOES NOT
                EXCLUDE, THE RESPONSIBLE PARTY'S LIABILITY TO THE
                INJURED PARTY FOR DAMAGES CAUSED BY NEGLIGENT (INCLUDING
                GROSSLY NEGLIGENT) ACTS OF THE RESPONSIBLE PARTY AND
                PERSONS ACTING ON THE RESPONSIBLE PARTY'S BEHALF.

     22.06 No Limitations of Liability in Contravention of Federal or State
Law.  Nothing contained in this article shall be construed as exempting either
party from any liability, or limiting such party's liability, in contravention
of federal law or in contravention of the laws of this State.

     22.07 Claims Against Third Parties.  Nothing contained in this article
shall be construed as requiring either party to forego any claims that such
party may have against third parties, including but not limited to contractors,
subcontractors, or persons (other than the other party's employees) acting on
the other party's behalf.

                             ARTICLE 23:  INSURANCE

     23.01 Insurance Required.  Applicant shall comply with the insurance
requirements specified in this section.

           (a)  Unless Applicant has provided proof of self-insurance as 
                permitted in Section 23.02 below, Applicant shall obtain and
                maintain in full force and effect, for so long as this Agreement
                remains in effect, insurance policies specified in APPENDIX IV
                of this Agreement. Each policy shall name SWBT as an additional
                insured and shall include provisions requiring the insurer to
                give SWBT notice of any lapse, cancellation, or 

                                    PAGE 88
<PAGE>   262

                termination of the policy or any modification to the policy
                affecting SWBT's rights under the policy, including but not
                limited to any decrease in coverage or increase in deductibles.

           (b)  Except as provided in this subsection, exclusions from coverage 
                or deductibles, other than those expressly permitted in APPENDIX
                IV, must be approved in writing by SWBT. For authorized
                contractors and other contractors performing work on, within, or
                in the vicinity of SWBT's poles, ducts, conduits, and
                rights-of-way on Applicant's behalf, exclusions from coverage or
                deductibles, other than those expressly permitted in APPENDIX
                IV, must be approved in writing by Applicant.

           (c)  Authorized contractors and other contractors performing work 
                on, within, or in the vicinity of SWBT's poles, ducts,
                conduits, or rights-of-way on Applicant's behalf shall be
                required to meet the same insurance requirements applicable to
                contractors performing similar work on SWBT's behalf. Applicant
                shall be responsible for securing compliance by its contractors
                with this requirement and shall be liable to SWBT for any
                damages resulting from its failure to do so.

           (d)  Self-insurance shall be permitted for persons and entities 
                (including but not limited to Applicant and authorized
                contractors) meeting the self-insurance requirements set forth
                in Section 23.02;

     23.02 Proof of Insurance or Self-insurance.  Proof of insurance or
self-insurance shall be made pursuant to the provisions of this section.

           (a)  Applicant shall submit to SWBT adequate proof (as determined by 
                SWBT) that the companies insuring Applicant are providing all
                coverages required by this Agreement. Applicant's insurers shall
                provide SWBT with certifications that required coverages will
                not be cancelled, changed or materially altered (e.g., by
                increasing deductibles or altering exclusions from coverage)
                except after 30 days written notice to SWBT.

           (b)  SWBT will accept certified proof of a person or entity's 
                qualification as a self-insurer for Workers' Compensation and
                Employers Liability, where self-insurance is permitted, upon
                receipt of a current copy of a Certificate of Authority to
                Self-insure issued by the Workers' Compensation Commission of
                this State. SWBT will accept self-insurance by a person or
                entity in lieu of other Commercial General Liability and
                Automobile Liability Coverage if such person or entity warrants
                that its net worth, as shown by its most recent audited
                financial statement with no negative notes, is at least 10 times
                the minimum liability limits set forth in APPENDIX IV and SWBT
                is satisfied that 


                                    PAGE 89
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                such entity will be able to meet its liability obligations under
                this Agreement.

           (c)  Applicant shall be responsible for
                determining whether contractors and other persons
                present on Applicant's behalf on, within, and in the
                vicinity of SWBT's poles, ducts, conduits, and
                rights-of-way meet the self-insurance requirements of
                this subsection.  Applicant may accept certified proof
                of any such person's or entity's qualification as a
                self-insurer for Workers' Compensation and Employers
                Liability, where self-insurance is permitted, upon
                receipt of a current copy of a Certificate of Authority
                to Self-insure issued by the Workers' Compensation
                Commission of this State.  Applicant may accept proof of
                self-insurance by a person or entity in lieu of other
                Commercial General Liability and Automobile Liability
                Coverage if such person or entity warrants that its net
                worth, as shown by its most recent audited financial
                statement with no negative notes, is at least 10 times
                the minimum liability limits set forth in APPENDIX IV
                and Applicant is satisfied that such entity will be able
                to meet its liability obligations with respect to
                activities performed on, within, and in the vicinity of
                SWBT's poles, ducts, conduits, and rights-of-way.

     23.03 Licensing Contingent on Proof of Insurance.  All insurance required
in accordance with APPENDIX IV, or self-insurance as permitted in Section
23.02, must be in effect before SWBT will issue pole attachment or conduit
occupancy licenses under this Agreement and shall remain in force until all of
Applicant's facilities have been removed from SWBT's poles, ducts, conduits,
and rights-of-way.

     23.04 Failure to Obtain or Maintain Coverage.  Applicant's failure to
obtain and maintain the required levels and types of insurance coverage
required under this Agreement shall be grounds for termination of this
Agreement and licenses subject to this Agreement.  If an insurance carrier
shall at any time notify Applicant or SWBT that any policy or policies of
insurance required under this Agreement will be cancelled or changed in any
manner which will result in Applicant's failure to meet the requirements of
this Agreement, SWBT may terminate this Agreement and all licenses subject to
this Agreement not less than 60 days after giving Applicant written notice of
its intention to do so, and such termination shall be effective on the
termination date specified in the notice unless Applicant has obtained (or made
arrangements satisfactory to SWBT to obtain) the required coverage from another
source.  In the alternative, SWBT may, in its sole discretion, elect to take
such action as may be necessary to keep such policy in effect with the required
coverages.

                       ARTICLE 24:  ASSIGNMENT OF RIGHTS

     24.01 Assignment Permitted.  Neither party may assign or otherwise
transfer its rights or obligations under this Agreement except as provided in
this section.

                                    PAGE 90

<PAGE>   264

           (a)  SWBT may assign its rights, delegate its benefits, and delegate 
                its duties and obligations under this Agreement, without
                Applicant's consent, to any entity controlling, controlled by,
                or under common control with SWBT or which acquires or succeeds
                to ownership of substantially all of SWBT's assets.

           (b)  Applicant may assign its rights, delegate its benefits, and 
                delegate its duties and obligations under this Agreement,
                without SWBT's consent, to: any telecommunications carrier or
                cable system operator which (1) is entitled to access to SWBT's
                poles, ducts, conduits, and rights-of-way under the Pole
                Attachment Act and (2) controls, is controlled by, or is under
                common control with Applicant or acquires and succeeds to
                ownership of substantially all of Applicant's assets; provided,
                however, that such assignment shall not be effective until
                Applicant has given SWBT written notice of the assignment
                pursuant to Section 24.03 and guaranteed the performance of
                Applicant's assignee or successor. Applicant's assignee or
                successor shall assume all outstanding obligations of Applicant
                under this Agreement, including but not limited to all
                liabilities and contingent liabilities of Applicant arising out
                of or in connection with this Agreement.

           (c)  Applicant may, ancillary to a bona fide loan transaction 
                between  Applicant and any lender, and without SWBT's
                consent, grant security interests or make collateral
                assignments in substantially all of Applicant's assets,
                including Applicant's rights under this Agreement, subject to
                the express terms of this Agreement. In the event Applicant's
                lender, in the bona fide exercise of its rights as a secured
                lender, forecloses on its security interest or arranges for a
                third party to acquire Applicant's assets through public or
                private sale or through an Agreement with Applicant,
                Applicant's lender or the third party acquiring Applicant's
                rights under this Agreement shall assume all outstanding
                obligations of Applicant under the agreement and provide proof
                satisfactory to SWBT that such lender or third party has
                complied or will comply with all requirements established under
                this Agreement. Notwithstanding any provisions of this
                Agreement to the contrary, such foreclosure by Applicant's
                lender or acquisition of assets by such third party shall not
                constitute a breach of this Agreement and, upon such
                foreclosure or acquisition, Applicant's lender or such third
                party shall succeed to all rights and remedies of Applicant
                under this Agreement (other than those rights and remedies, if
                any, which have not been transferred and, if Applicant is a
                debtor under the Federal Bankruptcy Code, those rights, if any,
                which remain a part of the debtor's estate notwithstanding an
                attempted foreclosure or transfer) and to all duties and
                obligations of Applicant under the Agreement, including
                liability to 

                                    PAGE 91

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                SWBT for any act, omission, default, or obligation that arose or
                occurred under the Agreement prior to the date on which such
                lender or third party succeeds to the rights of Applicant under
                the Agreement, as applicable.

                (1)  In the event Applicant or Applicant's lender requests that 
                     SWBT, in connection with a bona fide loan transaction
                     between Applicant and Applicant's lender, sign any
                     additional consents, or make other accommodations to
                     protect such lender's interest, Applicant or Applicant's
                     lender shall reimburse SWBT for all expenses incurred by
                     SWBT in connection with such requests and accommodations,
                     including but not limited to in-house or outside legal
                     expenses incurred by SWBT in processing the request.

                (2)  In the event Applicant or Applicant's lender desires that 
                     SWBT provide notices to Applicant's lender or permit
                     Applicant's lender, in the event of a breach, to cure any
                     default or termination event if Applicant fails to do so,
                     Applicant shall notify SWBT's authorized agent, as
                     designated in Article 29 of this Agreement, that such
                     notices may be sent to Applicant's lender as well to
                     Applicant. Nothing contained in this subsection shall be
                     construed as imposing any duty on SWBT in favor of
                     Applicant's lender, and this section shall not be construed
                     to provide Applicant's lender or any other third parties
                     with any rights, claims, causes of action of any kind.
                     Applicant waives any and all claims or causes of action, of
                     every kind and character, past, present, or future, arising
                     out of or in connection with the giving of any notice to
                     Applicant's lender pursuant to this section or any failure
                     to give such notice.

           (d)  Either party may assign or transfer rights or obligations under 
                this Agreement on such terms and conditions as are mutually
                acceptable to the other party and with such other party's prior
                written consent, which consent may be withheld only for due
                cause and justification.

           (e)  No assignment or transfer by Applicant of rights under this 
                Agreement, licenses subject to this Agreement, or authorizations
                granted under this Agreement shall be effective until Applicant,
                its successors, and assigns have complied with the provisions of
                this article, secured SWBT's prior written consent to the
                assignment or transfer, if necessary, and given SWBT notice of
                the assignment or transfer pursuant to Section 24.03.

           (f)  Except as otherwise expressly provided in this article, neither 
                this Agreement, nor any licenses or authorizations subject to
                this Agreement, shall inure to the benefit of Applicant's
                successors or assigns without SWBT's prior written consent.


                                    PAGE 92

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     24.02 Incorporations, Mergers, Acquisitions, and Other Changes in
Applicant's Legal Identity.  When the legal identity or status of Applicant
changes, whether by incorporation, reincorporation, merger, acquisition, or
otherwise, such change shall be treated as an assignment subject to the
provisions of this article.

     24.03 Notice of Assignment.  Applicant shall provide SWBT with 60 days
advance notice in writing of any assignment.

     24.04 Assignment Shall Not Relieve Applicant of Prior Obligations.  Except
as otherwise expressly agreed by SWBT in writing, no assignment permitted by
SWBT under this Agreement shall relieve Applicant of any obligations arising
under or in connection with this Agreement, including but not limited to
indemnity obligations under Article 21 of this Agreement or the interconnection
agreement, if any.

     24.05 Satisfaction of Existing Obligations and Assumption of Contingent
Liabilities.  SWBT may condition its approval of any requested assignment or
transfer on the assignee's or successor's payment or satisfaction of all
outstanding obligations of Applicant under this Agreement and the assignee's or
successor's assumption of any liabilities, or contingent liabilities, of
Applicant arising out of or in connection with this Agreement.

     24.06 Satisfaction of All Other Licensing Requirements.  Applicant's
assignee or successor must, within 60 days following the assignment, provide
proof satisfactory to SWBT that such assignee or successor has complied or will
comply with all licensing requirements established under this Agreement,
including but not limited to requirements that such assignee or successor
verify, to the best of its information and belief, as provided in Section
17.03, that all facilities owned or used by such assignee or successor and
presently attached to SWBT's poles or placed within any portion of SWBT's
conduit system within this State have been disclosed to SWBT and are subject to
existing licenses and that such assignee or successor has complied with the
insurance requirements set forth in Article 23 of this Agreement.

     24.07 Additional Post-Assignment Requirements.  Applicant's assignee or
successor shall, within 60 days following the assignment:

           (a)  sign this Agreement as an assignee or successor expressly 
                agreeing to be bound by all provisions of this Agreement and
                licenses subject to this Agreement;

           (b)  provide proof, satisfactory to SWBT, of such assignee's 
                assumption of the obligations of this Agreement; and

           (c)  pay a one-time contract administration fee, as provided in 
                APPENDIX I of this Agreement, if no Master Agreement for Access
                to SWBT's Poles, 

                                    PAGE 93
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                Ducts, Conduits, or Rights-of-Way between SWBT and such assignee
                is in effect for this State, or an administrative record-keeping
                fee as provided in APPENDIX I of this Agreement, if there is a
                Master Agreement in effect for this State.

     24.08 Sublicenses Prohibited.  Nothing contained in this Agreement shall
be construed as granting Applicant the right to sublicense any rights under
this Agreement or licenses subject to this Agreement to any third party.
Except as otherwise expressly permitted in this Agreement, Applicant shall not
allow third party to attach or place facilities to or in pole or conduit space
occupied by or assigned to Applicant or to utilize such space.

               ARTICLE 25:  TERMINATION OF AGREEMENT OR LICENSES;
                             REMEDIES FOR BREACHES

     25.01 Termination Due to Non-Use of Facilities or Loss of Required
Authority.  Applicant shall, by written notice to SWBT, terminate this
Agreement and all licenses subject to this Agreement if Applicant ceases to
have authority to do business or ceases to do business in this State, ceases to
have authority to provide or ceases to provide cable television services in
this State (if Applicant is cable television system having access to SWBT's
poles, ducts, conduits or rights-of-way solely to provide cable television
service), ceases to have authority to provide or ceases to provide
telecommunications services in this State (if Applicant is a telecommunications
carrier which does not also have authority to provide cable television service
in this State), or ceases to make active use of SWBT's poles, ducts, conduits,
and rights-of-way in this State.  Applicant shall, by written notice to SWBT,
terminate individual licenses subject to this Agreement if (a) Applicant ceases
to utilize the pole attachment or conduit occupancy space subject to such
licenses or (b) Applicant's permission to use or have access to particular
poles, ducts, conduits, or rights-of-way has been revoked, denied, or
terminated for reasons of safety or any other lawful reason by any federal,
state, or local governmental authority or third-party property owner having
authority to revoke, deny, or terminate such use or access.  Responsibility for
terminating this Agreement or individual licenses under the circumstances set
forth in this section shall be a contractual obligation imposed on Applicant,
and the failure by Applicant to terminate this Agreement or individual licenses
pursuant to this section shall be a material breach of this Agreement.

     25.02 Limitation, Termination, or Refusal of Access for Certain Material
Breaches.  Applicant's access to SWBT's poles, ducts, conduits, and
rights-of-way shall not materially interfere with or impair service over any
facilities of SWBT or any joint user, cause material damage to SWBT's plant or
the plant of any joint user, impair the privacy of communications carried over
the facilities of SWBT or any joint user, or create serious hazards
to the health or safety of any persons working on, within, or in the vicinity
of SWBT's poles, ducts, rights-of-way or to the public.  Upon reasonable notice
and opportunity to cure, SWBT may limit, terminate or refuse access if
Applicant violates this provision; provided, however, that such limitation,
termination or refusal will be 

                                    PAGE 94
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limited to Applicant's access to poles, ducts, conduits, and rights-of-way
located in the SWBT construction district in which the violation occurs, shall
be as narrowly limited in time and geographic scope as may be necessary to
enable Applicant to adopt suitable controls to prevent further violations, and
shall be subject to review, at Applicant's request, pursuant to the dispute
resolution procedures set forth in this Agreement (or, if applicable, the
parties' interconnection agreement) or, as permitted by law, before any court,
agency, or other tribunal having jurisdiction over the subject matter. In the
event Applicant invokes dispute resolution procedures or seeks review before a
court, agency, or other tribunal having jurisdiction of the subject matter, the
limitation, termination, or refusal of access may be stayed or suspended by
agreement of the parties or by order of the tribunal having jurisdiction over
the parties' dispute.

     25.03 Notice and Opportunity to Cure Breach.  In the event of any claimed
breach of this Agreement by either party, the aggrieved party may give written
notice of such claimed breach as provided in this section.

           (a)  The notice shall set forth in reasonable detail:

                (1)  the conduct or circumstances complained of, together with 
                     the complaining party's legal basis for asserting that
                     a breach has occurred;

                (2)  the action believed necessary to cure the alleged breach; 
                     and

                (3)  any other matter the complaining party desires to include 
                     in the notice.

           (b)  Except as provided in Section 25.02 and subsection (c) of this 
                section, the complaining party shall not be entitled to pursue
                any remedies available under this Agreement or relevant law
                unless such notice is given and (1) the breaching party fails to
                cure the breach within 30 days of such notice, if the breach is
                one which can be cured within 30 days, or (2) the breaching
                party fails to commence promptly and pursue diligently a cure of
                the breach, if the required cure is such that more than 30 days
                will be required to effect such cure; provided, however, that
                nothing contained in this section shall preclude either party
                from invoking the dispute resolution procedures set forth in
                Article 30 of this Agreement, or any complaint or dispute
                resolution procedures offered by the FCC or State Commission, at
                any time.

           (c)  Nothing contained in this section shall preclude either party 
                from filing a complaint or bringing suit in any court, agency,
                or other tribunal of competent jurisdiction to restrain or
                enjoin any conduct of the other party which threatens the
                complaining party with irreparable injury, loss 

                                    PAGE 95
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                or damage without first giving the notice otherwise required by
                subsection (b).

     25.04 Remedies for Breach.  Subject to the provisions of this article and
the dispute resolution procedures of Article 30, either party may terminate
this Agreement in the event of a material breach by the other party or exercise
any other legal or equitable right which such party may have to enforce the
provisions of this Agreement.  Except as otherwise specifically provided in
Section 30.07, in any action based on an alleged breach of this Agreement, the
prevailing party shall be entitled to recover all costs and expenses incurred
by such party, including but not limited to reasonable attorneys' fees.

                        ARTICLE 26:  FAILURE TO ENFORCE

     26.01 No Waiver.  The failure by either party to take action to enforce
compliance with any of the terms or conditions of this Agreement, to give
notice of any breach, or to terminate this Agreement or any license or
authorization subject to this Agreement shall not constitute a waiver or
relinquishment of any term or condition of this Agreement, a waiver or
relinquishment of the right to give notice of breach, or waiver or
relinquishment of any right to terminate this Agreement.  Notwithstanding any
such failure, all terms and conditions of this Agreement and all rights of
either party hereunder shall be and remain at all times in full force and
effect.

          ARTICLE 27:  EFFECTIVE DATE, TERM, AND ELECTIVE TERMINATION

     27.01 Effective Date.  This Agreement shall be effective as of the _____
day of ________________, 199_, or, if this Agreement has been entered into as
an appendix, attachment, or exhibit to an interconnection agreement between the
parties, the date of approval by the State Commission of the interconnection
agreement, whichever date first occurs.

     27.02 Initial Term.  Unless sooner terminated as herein provided, the
initial term of this Agreement shall run from the effective date until the end
of the calendar year which includes the effective date.

     27.03 Automatic Renewal.  Unless sooner terminated as herein provided,
this Agreement shall be automatically renewed for successive one-year terms
beginning on the first day of each calendar year after the effective date.

     27.04 Elective Termination.  Either party may terminate this Agreement by
giving the other party at least six months prior written notice as provided in
this section.

           (a)  Applicant may terminate this Agreement with or without cause.

           (b)  The parties acknowledge that the Pole
                Attachment Act, 47 U.S.C. Section 224(e), as added by the
                Telecommunications Act of 1996, expressly 

                                    PAGE 96
<PAGE>   270

                directs the FCC to promulgate new regulations governing charges
                to telecommunications carriers for access to poles, ducts,
                conduits, and rights-of-way and that such new regulations are to
                take effect five years after the date of enactment of the
                Telecommunications Act of 1996 (that is, February 8, 2001). The
                parties further acknowledge that due to nondiscrimination
                requirements, it is desirable that formal attachment agreements
                establishing rates, terms, and conditions of access be revised
                simultaneously, to the extent possible. Accordingly, the parties
                agree that SWBT may terminate this Agreement only for cause
                during the period beginning with the effective date of this
                Agreement through February 8, 2001. Thereafter, SWBT may
                terminate this Agreement with or without cause, subject to the
                provisions of subsection (d) and Section 27.05 below.

           (c)  The notice of termination shall state
                the effective date of termination, which date shall be
                no earlier than the last to occur of the following
                dates:  the last day of the current term of this
                Agreement or six months after the date the notice is
                given.

           (d)  The elective termination of this Agreement by SWBT under this 
                section shall not require immediate removal of Applicant's
                facilities from poles, ducts, conduits, and rights-of-way owned
                or controlled by SWBT and shall be subject to the provisions of
                Section 27.05 below; provided, however, that Applicant shall,
                within 60 days after the effective date of the termination,
                either initiate negotiations for continued access to SWBT's
                poles, ducts, conduits, and rights-of-way or remove its
                facilities in accordance with the provisions of Article 18 of
                this Agreement.

     27.05 Effect of Elective Termination.  Elective termination of this
Agreement by Applicant, as permitted under Section 27.04 of this Agreement,
shall not affect Applicant's liabilities and obligations incurred under this
Agreement prior to the effective date of termination and shall not entitle
Applicant to the refund of any advance payment made to SWBT under this
Agreement.  Elective termination of this Agreement by SWBT shall not affect
SWBT's obligations to afford access to SWBT's poles, ducts, conduits, and
rights-of-way owned or controlled by SWBT as required by the Pole Attachment
Act, the Telecommunications Act of 1996, and other applicable laws,
regulations, and commission orders.

                  ARTICLE 28:  CONFIDENTIALITY OF INFORMATION

     28.01 Information Provided by Applicant to SWBT.  Except as otherwise
specifically provided in this Agreement, all company-specific and
customer-specific information submitted by Applicant to SWBT in connection with
this Agreement (including but not limited to information submitted in connection
with Applicant's applications for the assignment of pole attachment and
occupancy space and for pole 

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<PAGE>   271

attachment and conduit occupancy licenses) shall be deemed to be "confidential"
or "proprietary" information of Applicant and shall be subject to the terms set
forth in this article. Confidential or proprietary information specifically
includes information or knowledge related to Applicant's review of records
regarding a particular market area, or relating to assignment of space to
Applicant in a particular market area, and further includes knowledge or
information about the timing of Applicant's request for or review of records or
its inquiry about SWBT facilities. This article does not limit the use by SWBT
of aggregate information relating to the occupancy and use of SWBT's poles,
ducts, conduits, and rights-of-way by firms other than SWBT (that is,
information submitted by Applicant and aggregated by SWBT in a manner that does
not directly or indirectly identify Applicant).

     28.02 Access Limited to Persons with a Need to Know.  Confidential or
proprietary information provided by Applicant to SWBT in connection with this
Agreement shall not be disclosed to, shared with, or accessed by any person or
persons (including but not limited to personnel involved in sales, marketing,
competitive intelligence, competitive analysis, strategic planning, and similar
activities) other than those who have a need to know such information for the
limited purposes set forth in Sections 28.03-28.06.

     28.03 Permitted Uses of Applicant's Confidential Information.
Notwithstanding the provisions of Sections 28.01 and 28.02 above, SWBT and
persons acting on SWBT's behalf may utilize Applicant's confidential or
proprietary information for the following purposes:  (a) posting information,
as necessary, to SWBT's outside plant records; (b) placing, constructing,
installing, operating, utilizing, maintaining, monitoring, inspecting,
repairing, relocating, transferring, conveying, removing, or managing SWBT's
poles, ducts, conduits, and rights-of-way and any SWBT facilities located on,
within, or in the vicinity of such poles, ducts, conduits, and rights-of-way;
(c) performing SWBT's obligations under this Agreement and similar agreements
with third parties; (d) performing SWBT's general obligations to afford
nondiscriminatory access to telecommunications carriers and cable television
systems under the Pole Attachment Act; (e) determining which of SWBT's poles,
ducts, conduits, and rights-of-way are (or may in the future be) available for
SWBT's own use, and making planning, engineering, construction, and budgeting
decisions relating to SWBT's poles, ducts, conduits, and rights-of-way; (f)
preparing cost studies; (g) responding to regulatory requests for information;
(h) maintaining SWBT's financial accounting records; and (i) complying with
other legal requirements relating to poles, ducts, conduits, and rights-of-way.

     28.04 Access by Third Parties.  Information reflecting the assignment of
pole attachment and conduit occupancy space to Applicant may be made available
to personnel of third parties seeking access to SWBT's records under
provisions, and subject to protections, equivalent to those contained and
required by Section 7.03 of this Agreement.

                                    PAGE 98

<PAGE>   272

     28.05 Defense of Claims.  In the event of a dispute between SWBT and any
person or entity, including Applicant, concerning SWBT's performance of this
Agreement, satisfaction of obligations under similar agreements with third
parties, compliance with the Pole Attachment Act, compliance with the
Telecommunications Act of 1996, or compliance with other federal, state, or
local laws, regulations, commission orders, and the like, SWBT may utilize
confidential or proprietary information submitted by Applicant in connection
with this Agreement as may be reasonable or necessary to demonstrate compliance,
protect itself from allegations of wrongdoing, or comply with subpoenas, court
orders, or reasonable discovery requests; provided, however, that SWBT shall not
disclose Applicant's proprietary or confidential information without first, at
SWBT's option: (a) obtaining an agreed protective order or nondisclosure
agreement that preserves the confidential and proprietary nature of Applicant's
information; (b) seeking such a protective order as provided by law if no agreed
protective order or nondisclosure agreement can be obtained; or (c) providing
Applicant notice of the subpoena, demand, or order and an opportunity to take
affirmative steps of its own to protect such proprietary or confidential
information.

     28.06 Response to Subpoenas, Court Orders, and Agency Orders.  Nothing
contained in this article shall be construed as precluding SWBT from complying
with any subpoena, civil or criminal investigative demand, or other order
issued or entered by a court or agency of competent jurisdiction; provided,
however, that SWBT shall not disclose Applicant's proprietary or confidential
information without first, at SWBT's option:  (a) obtaining an agreed
protective order or nondisclosure agreement that preserves the confidential and
proprietary nature of Applicant's information; (b) seeking such a protective
order as provided by law if no agreed protective order or nondisclosure
agreement can be obtained; or (c) providing Applicant notice of the subpoena,
demand, or order and an opportunity to take affirmative steps of its own to
protect such proprietary or confidential information.

     28.07 Other Uses of Confidential Information.  No other uses of
confidential information received from Applicant pursuant to this Agreement are
authorized or permitted without Applicant's express written consent.

                              ARTICLE 29:  NOTICES

     29.01 Notices to Applicant.  Except as otherwise provided in APPENDIX VI
("Notices to Applicant"), all written notices required to be given to Applicant
shall be delivered or mailed to Applicant's duly authorized agent or attorney,
as designated in this section.

           (a)  Such notice may be delivered to Applicant's duly authorized 
                agent or attorney in person or by agent or courier receipted
                delivery.

           (b)  Such notice may be mailed to Applicant's duly authorized agent 
                or attorney by registered or certified mail, return receipt
                requested. When 

                                    PAGE 99
<PAGE>   273

                notice is given by mail, such notice shall be complete upon
                deposit of the notice, enclosed in a postpaid, properly
                addressed wrapper, in a post office or official depository under
                the care and control of the United States Postal Service and
                shall be deemed to have been given three days after the date of
                deposit.

           (c)  Applicant may authorize delivery of
                the notice by telephonic document transfer to the
                Applicant's duly authorized agent or attorney.  Notice
                by telephonic document transfer after 5:00 p.m. local
                time of the recipient shall be deemed given on the
                following day.

           (d)  Notices to Applicant shall be sent to
                the authorized agent or attorney designated below:

                Name: ___________________________________________________

                Title: __________________________________________________

                Firm: ___________________________________________________

                Address: ________________________________________________

                City/State/Zip: _________________________________________

     29.02 Notices to SWBT.  Except as otherwise provided in APPENDIX VII
("Notices to SWBT"), all written notices required to be given to SWBT shall be
delivered or mailed to SWBT's duly authorized agent or attorney, as designated
in this section.

                  (a)  Such notice may be delivered to
                       SWBT's duly authorized agent or attorney in person or by
                       agent or courier receipted delivery.

                  (b)  Such notice may be mailed to SWBT's
                       duly authorized agent or attorney by registered or
                       certified mail, return receipt requested.  When notice
                       is given by mail, such notice shall be complete upon
                       deposit of the notice, enclosed in a postpaid, properly
                       addressed wrapper, in a post office or official
                       depository under the care and control of the United
                       States Postal Service and shall be deemed to have been
                       given three days after the date of deposit.

                  (c)  SWBT may authorize delivery of the
                       notice by telephonic document transfer to SWBT's duly
                       authorized agent or attorney.  Notice by telephonic
                       document transfer after 5:00 p.m. local time of the
                       recipient shall be deemed given on the following day.

                                    PAGE 100
<PAGE>   274

                  (d)  On the effective date of this Agreement, and until 
                       further notice to Applicant, SWBT's duly authorized 
                       agent shall be the Utility Liaison Supervisor ("ULS") 
                       designated in APPENDIX VIII.

     29.03 Changes in Notice Requirements.  Either party may, from time to
time, change notice addressees and addresses by giving written notice of such
change to the other party.  Such notice shall state, at a minimum, the name,
title, firm, and full address of the new addressee.

                        ARTICLE 30:  DISPUTE RESOLUTION

     30.01 Purpose.  The provisions of this article are intended to minimize
litigation between the parties with respect to disputes arising in connection
with this Agreement and shall be construed accordingly.  Any dispute between
the parties arising under this Agreement may be submitted by either party for
resolution under this article.

     30.02 Exclusive Remedy for Monetary Claims under $25,000.  Except for
actions seeking injunctive relief related to the purposes of this Agreement or
suits to compel compliance with the dispute resolution processes set forth in
this article, the parties agree to use the dispute resolution processes set
forth in this Agreement as their sole remedy with respect to any monetary claim
of $25,000 or less which arises out of or in connection with this Agreement.

     30.03 Prerequisite to Litigation.  The provisions of this article shall
also apply to all disputes, without regard to the amount in controversy, in
which Applicant contests charges billed by SWBT to Applicant under the terms of
this Agreement.  No suit, except for actions seeking injunctive relief related
to the purposes of this Agreement or suits to compel compliance with the
dispute resolution processes set forth in this article, shall be filed by
either party against the other with respect to such contested charges until the
parties have engaged in good faith negotiations as provided in Section 30.04,
and, if the parties agree, in mediation under Section 30.05.

     30.04 Good Faith Negotiation.  Good faith negotiation as provided in this
section shall be the first step in the dispute resolution process.

                  (a)  With respect to any dispute subject
                       to the provisions of this article, either party may
                       initiate negotiation proceedings by writing a certified
                       or registered letter to the other party setting forth
                       the particulars of the dispute, the terms of the
                       Agreement that are involved, and a suggested resolution
                       of the problem.

                  (b)  The recipient of the letter shall
                       respond within 21 days to the proposed solution.  The
                       recipient shall either agree to the proposed solution or
                       explain its disagreement.

                                    PAGE 101

<PAGE>   275

                  (c)  If the correspondence does not resolve the dispute, each 
                       party, at the request of either party, will appoint a
                       knowledgeable, responsible representative to meet and
                       negotiate in good faith to resolve the dispute.  The
                       location, form, frequency, duration, and conclusion of
                       these discussions shall be left to the discretion of the
                       representatives.  Upon agreement, the representatives
                       may utilize other alternative dispute resolution
                       procedures such as mediation to assist in the
                       negotiations.

                  (d)  Discussions and correspondence among the representatives 
                       as provided by this section are for purposes of
                       settlement, are exempt from discovery and production, and
                       shall not be admissible in arbitration, judicial,
                       regulatory, or other proceedings in any forum.

     30.05 Mediation.  If the parties agree to mediation, the mediation may be
conducted as provided in this section or in such other manner as may be
mutually agreeable to the parties.

                  (a)  If agreed to by the parties, the dispute shall be 
                       referred to the nearest office of the American
                       Arbitration Association, or such other mediator as may be
                       selected by agreement of the parties, for mediation, that
                       is, an informal, non-binding conference or conferences
                       between the parties in which a mediator will seek to
                       guide the parties to a resolution of the dispute.

                  (b)  If the dispute is referred to the American Arbitration 
                       Association, the parties are free to select any mutually
                       acceptable panel member from the list of mediators at the
                       American Arbitration Association. If the parties cannot
                       agree or have no particular choice of a mediator and
                       simply request that the American Arbitration Association
                       assign a mediator to the dispute, then a list and resumes
                       of available mediators, numbering one more than there are
                       parties, will be sent to the parties, each of whom may
                       strike one name leaving the remaining name as the
                       mediator. If more than one name remains, the designated
                       mediator shall be selected by the Administrator of the
                       American Arbitration Association from the remaining
                       names.

                  (c)  Mediation sessions shall be private.

                  (d)  All records, reports or other
                       documents considered by the mediator shall be
                       confidential.

                  (e)  The parties agree that the mediator
                       shall not be compelled to divulge confidential materials
                       or to testify about the mediation in arbitration,
                       regulatory, judicial, or other proceedings in any forum.

                                    PAGE 102
<PAGE>   276

                  (f)  The parties agree to maintain the confidentiality of the 
                       mediation and shall not rely on, or introduce as 
                       evidence in any arbitration, judicial, or other 
                       proceeding:

                        (1)  views expressed or
                             suggestions made by the other party with respect
                             to a possible settlement of the dispute;

                        (2)  admissions made by the
                             other party during the mediation proceedings;

                        (3)  proposals made or views
                             expressed by the mediator; or

                        (4)  the fact that the other
                             party had or had not indicated willingness to
                             accept a proposal for settlement made by the
                             mediator.

                  (g)  Subsections (e) and (f) of this section shall apply to 
                       anything said, done or occurring in the course of the
                       mediation, including any private caucus or               
                       discussions between the mediator and any party or counsel
                       before or after the joint mediation session. There shall
                       be no stenographic record of the mediation process,
                       except to memorialize a settlement record.

                  (h)  The mediation process shall be considered settlement 
                       negotiation for the purpose of all state and
                       federal rules protecting disclosures made during such
                       conferences from later discovery or use in evidence.  All
                       conduct, statements, promises, offers, views, and
                       opinions, oral or written, made during the mediation by
                       any party or a party's agent, employee, or attorney are
                       confidential and, where appropriate, are to be considered
                       work product and privileged.  Such conduct, statements,
                       promises, offers, views, and opinions shall not be
                       subject to discovery or admissible for any purpose,
                       including impeachment, in any litigation or other
                       proceeding involving the parties; provided, however, that
                       evidence otherwise subject to discovery or admissible is
                       not excluded from discovery or admission in evidence
                       simply as a result of its having been used in connection
                       with this settlement process.

     30.06 Arbitration.  If negotiations and mediations do not resolve the
dispute within 90 days after the initiation of dispute resolution proceedings
as provided in subsection (a) of Section 30.04 of this Agreement, the dispute
shall be submitted to binding arbitration by a single arbitrator pursuant to
the Commercial Arbitration Rules of the American Arbitration Association if the
dispute involves any monetary claim of $25,000 or less which arises out of or
in connection with this Agreement.  The parties may voluntarily elect to
arbitrate disputes in which the amount in controversy exceeds $25,000, but they
shall not be required by this Agreement to do so.

                                    PAGE 103
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                  (a)  Either party may demand such arbitration in accordance 
                       with the procedures set out in the Commercial
                       Arbitration Rules.

                  (b)  Discovery shall be controlled by the
                       arbitrator and shall be permitted to the extent set out
                       in this subsection.

                        (1)  Each party may submit in writing to any other 
                             party, and such other party shall so respond, to 
                             a maximum of any combination of 35 of the 
                             following:  interrogatories, document production 
                             requests, and requests for admissions. The 
                             interrogatories, document production requests,
                             and requests for admissions shall not have
                             subparts.

                        (2)  Additional discovery may be permitted upon mutual 
                             agreement of the parties or upon order of the 
                             arbitrator on a showing of good cause.

                  (c)  The arbitrator shall control the scheduling so as to 
                       process the matter expeditiously. The times set
                       forth in this subsection shall apply unless extended
                       upon mutual agreement of the parties or by the
                       arbitrator on a showing of good cause.

                        (1)  The arbitration hearing shall commence within 60 
                             days of the demand for arbitration and shall
                             be held, in the absence of agreement by the
                             parties to a different venue, in St. Louis,
                             Missouri.

                        (2)  The parties shall submit written briefs five days 
                             before the hearing.

                        (3)  The arbitrator shall rule on the dispute by 
                             issuing a written opinion within 30 days after 
                             the close of hearings.

                        (4)  The arbitrator shall have no authority to order 
                             punitive or consequential damages.

                        (5)  Judgment upon the award rendered by the arbitrator 
                             may be entered in any court of competent 
                             jurisdiction.

     30.07 Costs.  Except as specifically provided in this section, each party
shall bear its own costs of all dispute resolution procedures under this
article.

                  (a)  A party seeking discovery shall
                       reimburse the responding party for the costs incurred by
                       the responding party in producing documents.

                  (b)  The parties shall equally split the
                       fees of the arbitration and the arbitrator.

                                    PAGE 104
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     30.08 No Abridgment of Rights under the Communications Act of 1934 or the
Pole Attachment Act.  Nothing contained in this article shall abridge the
rights of either party to seek relief from the FCC with respect to any dispute
subject to the jurisdiction of the FCC under the Communications Act of 1934 or
the Pole Attachment Act, or from the State Commission with respect to any
dispute subject to its jurisdiction, except that the parties may not seek
relief from the FCC or the State Commission with respect to any dispute that
has already been resolved by mediation under Section 30.05 or by binding
arbitration under Section 30.06.

                       ARTICLE 31:  ACCESS TO APPLICANT'S
                   POLES, DUCTS, CONDUITS, AND RIGHTS-OF-WAY

     31.01 No Reciprocal Access to Applicant's Facilities.  This Agreement does
not include provisions for reciprocal access by SWBT to Applicant's poles,
ducts, conduits, and rights-of-way.

                        ARTICLE 32:  GENERAL PROVISIONS

     32.01 Entire Agreement.  This Agreement, together with the interconnection
agreement, if any, to which this Agreement is an appendix,attachment, or
exhibit, sets forth the entire understanding and agreement of the parties.

     32.02 Prior Agreements Superseded.  This Agreement supersedes all prior
agreements and understandings, whether written or oral, between Applicant and
SWBT relating to the placement and maintenance of Applicant's facilities on and
within SWBT's poles, ducts, and conduits within this State.

     32.03 Amendments Shall Be in Writing.  Except as otherwise specifically
provided to the contrary by other provisions of this Agreement, the terms and
conditions of this Agreement shall not be amended, changed or altered except in
writing and with approval by authorized representatives of both parties.

     32.04 Survival of Obligations.  Any liabilities or obligations of either
party for acts or omissions prior to the termination of this Agreement, any
obligations of either party under provisions of this Agreement relating to
confidential and proprietary information, indemnification, limitations of
liability, and any other provisions of this Agreement which, by their terms,
are contemplated to survive (or be performed after) termination of this
Agreement, will survive the termination of this Agreement.

     32.05 Multiple Counterparts.  This Agreement may be executed in multiple
counterparts.

     32.06 Effect on Licenses Issued Under Prior Agreements.  All currently
effective pole attachment and conduit occupancy licenses granted to Applicant
shall, on the 

                                    PAGE 105
<PAGE>   279

effective date of this Agreement, be subject to the rates, terms,
conditions, and procedures set forth in this Agreement.

     32.07 Force Majeure.  Except as otherwise specifically provided in this
Agreement, neither party will be liable for any delay or failure in performance
of any part of this Agreement caused by a Force Majeure condition, including
acts of the United States of America or any state, territory, or political
subdivision thereof, acts of God or a public enemy, fires, floods, disputes,
freight embargoes, earthquakes, volcanic actions, wars, civil disturbances,
cable cuts, or other causes beyond the reasonable control of the party claiming
excusable delay or other failure to perform; provided, however, that Force
Majeure will not include acts of any governmental authority relating to
environmental, health, or safety conditions at work locations.
If any Force Majeure condition occurs, the party whose performance fails or is
delayed because of such Force Majeure condition will give prompt notice to the
other party, and, upon cessation of such Force Majeure condition, will give
like notice and commence performance hereunder as promptly as reasonably
practicable.

     32.08 Severability.  If any article, section, subsection, or other
provision or portion of this Agreement is or becomes invalid under any
applicable statute or rule of law, and such invalidity does not materially
alter the essence of this Agreement as to either party, the invalidity of such
provision shall not render this entire Agreement unenforceable and this
Agreement shall be administered as if it did not contain the invalid provision.

     32.09 Choice of Law.  Except to the extent that federal law controls any
aspect of this Agreement, the validity of this Agreement, the construction and
enforcement of its terms, and the interpretation of the rights and duties of
the parties will be governed by the laws of this State, applied without regard
to the provisions of this State's laws relating to conflicts-of-laws.

     32.10 Changes in the Law.  Because the primary purpose of this Agreement
is to provide access to poles, ducts, conduits, and rights-of-way in accordance
with the Pole Attachment Act, as amended by the Telecommunications Act of 1996
and subsequent amendments, the parties contemplate that changes in this
Agreement may from time to time be necessary or desirable to conform to changes
in the Pole Attachment Act as that Act is amended, interpreted, and applied.
This Agreement is based in large part on regulatory decisions by the FCC, which
has jurisdiction over the rates, terms, and conditions of access to poles,
ducts, conduits, and rights-of-way (except to the extent that such jurisdiction
has been pre-empted by individual states) and decisions by the State
Commission.  More specifically, this Agreement is based in large part on the
FCC's First Interconnection Order in CC Docket No. 96-98, on FCC rules
announced with the First Interconnection Order, and on Arbitration Orders by
the State Commission.

                  [  ] Applicant desires to have access to
                       SWBT's poles, ducts, conduits, and rights-of-way on
                       terms that are not less favorable than those obtained by
                       firms participating in interconnection arbitration

                                    PAGE 106

<PAGE>   280

                       proceedings before the State Commission. Applicant also
                       desires to have access to SWBT's poles, ducts, conduits,
                       and rights-of-way to the full extent permitted under the
                       FCC's First Interconnection Order in CC Docket No. 96-98.
                       SWBT is entering into this Agreement for the purpose of
                       providing nondiscriminatory access in compliance with the
                       Pole Attachment Act and regulatory decisions thereunder,
                       including decisions by the State Commission in
                       interconnection arbitration proceedings in which
                       Applicant is not a party. Each party is entering into
                       this Agreement based on current interpretations of the
                       law by the FCC and State Commission. In the event of any
                       changes in the Pole Attachment Act, changes in applicable
                       FCC or State Commission rulings, or judicial
                       determinations that such rulings are erroneous or
                       invalid, each party shall, at the request of the other,
                       engage in good faith negotiations to supplement, amend or
                       replace any provisions of this Agreement affected by such
                       changes or determinations and to conform this Agreement
                       to changes in the underlying laws on which the Agreement
                       is based.

                  [  ] This Agreement has been entered into as a result of 
                       private negotiation between the parties and arbitration
                       by the State Commission, acting pursuant to the
                       Telecommunications Act of 1996. If the actions of any
                       legislative bodies, courts, or regulatory agencies of
                       competent jurisdiction invalidate, modify, or stay the
                       enforcement of laws, rules, regulations, or commission
                       orders that were the basis for a provision of this
                       Agreement (including but not limited to any provision of
                       this Agreement required by any arbitration award approved
                       by the State Commission), the affected provision shall be
                       invalidated, modified, or stayed as required by action of
                       the legislative body, court, or regulatory agency. In the
                       event of such a change in the law, each party shall
                       expend diligent efforts to arrive at an agreement
                       respecting the modifications to the Agreement required by
                       the law or requested in good faith by the other party. If
                       negotiations fail, disputes between the parties
                       concerning interpretation of the actions required or
                       provisions affected by such governmental actions shall be
                       resolved pursuant to the dispute resolution process
                       provided for in the interconnection agreement or this
                       Agreement; provided, however, that this section shall not
                       be construed as precluding either party from seeking
                       appropriate relief from the FCC in connection with the
                       parties' rights and obligations under the Pole Attachment
                       Act. In the event of any material change in the law, each
                       party agrees to enter into good faith negotiations to
                       conform this Agreement to the changes in the law.


                                    PAGE 107
<PAGE>   281
THIS AGREEMENT CONTAINS A BINDING ARBITRATION PROVISION WHICH MAY BE ENFORCED BY
THE PARTIES.

SOUTHWESTERN BELL TELEPHONE COMPANY

By:
     -------------------------------------------------------------------------
     Signature of SWBT's Authorized Officer/Employee

     -------------------------------------------------------------------------
     Name of SWBT's Authorized Officer/Employee (Printed or Typed)

     -------------------------------------------------------------------------
     Position/Title of SWBT's Authorized Officer/Employee

     -------------------------------------------------------------------------
     Date

     -------------------------------------------------------------------------
     City and State of Execution by SWBT

- ------------------------------------------------------------------------------
Applicant's Name (Printed or Typed)

By:
     -------------------------------------------------------------------------
     Signature of Applicant's Authorized Officer/Employee

     -------------------------------------------------------------------------
     Name of Authorized Officer/Employee (Printed or Typed)

     -------------------------------------------------------------------------
     Position/Title of Authorized Officer/Employee

     -------------------------------------------------------------------------
     Date

     -------------------------------------------------------------------------
     City and State of Execution by Applicant

                                    PAGE 108


<PAGE>   282

                                                       Agreement No. ___________
                                   APPENDIX I
         SCHEDULE OF RATES, FEES AND CHARGES (OKLAHOMA) -- PAGE 1 OF 4



     This Appendix is an integral part of the Master Agreement for Access to
Poles, Ducts, Conduits, and Rights-of-Way to which it is attached and sets forth
the rates, fees and charges to be paid by Applicant to SWBT pursuant to the
Master Agreement and licenses subject to the Master Agreement. The rates, fees,
and charges set forth in this Appendix shall be subject to all applicable laws,
rules, regulations, and commission orders as provided in Section 19.01 of the
Master Agreement and shall be subject to revision as provided in Section 19.12
of the Master Agreement.

A) Pole Attachment Fees

     1) General

        a)   For billing purposes, pole attachments shall be considered i) to 
             have commenced on the first to occur of the following dates: 
             the date of assignment (or provisional assignment) of pole
             attachment space, the date a license for such pole attachment is
             issued, or the date of actual attachment and ii) to have ended on
             the last to occur of the following dates:  the date Applicant's
             assignment lapses or is relinquished, the date of actual removal
             of the attached facilities from SWBT's pole, or the date of
             termination of Applicant's license.

       b)    Fees shall be payable semiannually in advance on the first days of 
             January and July and shall be prorated on a daily basis as
             provided in Section 19.04.  Fees for pole attachments shall be
             based on the number of pole attachments as of the date of
             billing.  If Applicant occupies more than one usable space on a
             pole, separate attachment fees shall apply to each space occupied. 
             For billing purposes, a single pole attachment includes the point
             of attachment and all facilities located in the usable space on
             the pole in the space assigned to Applicant (typically six inches
             above and six inches below the point of attachment), together with
             routine ancillary apparatus such as anchors, anchor/guy strands,
             drive rings, J-hooks, dead-end clamps, and other apparatus which
             does not interfere with the ability of SWBT to occupy or assign
             usable space on the pole other than the usable space licensed to
             Applicant.  Fees for pole space assignments and unauthorized pole
             attachments shall be billed in the same manner as if a license had
             been issued.



     2) Fees (1997 Rates)

<TABLE>
<CAPTION>
Semiannual Pole Attachment Fees                               Annual  Semiannual
- -------------------------------                               ------  ----------
<S>                                                           <C>     <C>
Per pole attachment (cable service only)                      $ 1.55      $0.775
Per pole attachment (telecommunications carriers)             $ 1.55      $0.775
Per pole attachment (other)                                   $ N/A   $ N/A
</TABLE>


<PAGE>   283

                                   APPENDIX I
            SCHEDULE OF FEES AND CHARGES (OKLAHOMA) -- PAGE 2 OF 4


B) Conduit Occupancy Fees

     1) General

        a)   For billing purposes, conduit occupancy shall be considered to 
             have i) begun on the first to occur of the following dates:  the
             date of assignment (or provisional assignment) of conduit  
             occupancy space, the date a license for such conduit occupancy is
             issued, or the date of actual occupancy; and ii) ended on the last
             to occur of the following dates:  the date Applicant's assignment
             lapses or is relinquished, the date of actual removal of the
             attached facilities from SWBT's conduit, or the date of
             termination of Applicant's license.  Occupancy ends when
             facilities have been removed from SWBT's conduit system and
             required post-removal procedures (e.g., plugging ducts) have been
             completed.  Fees for conduit space assignments and unauthorized
             conduit occupancy shall be billed in the same manner as if a
             license had been issued.

        b)   Fees shall be payable semiannually in advance on the first days of
             January and July.

     2) Fees (1997 Rates)

<TABLE>
<CAPTION>

Semiannual Per Foot Conduit Occupancy Fees          Annual      Semiannual
- ------------------------------------------          ------      ----------
<S>                                                <C>         <C>
Full duct/duct foot (cable service only)            $ 0.39/ft   $ 0.195/ft
Full duct/duct foot (telecommunications carriers)   $ 0.39/ft   $ 0.195/ft
Full duct/duct foot (other)                         $ N/A       $ N/A
Half duct/duct foot (cable service only)*           $ 0.195/ft  $ 0.0975/ft
Half duct/duct foot(telecommunications carriers)*   $ 0.195/ft  $ 0.0975/ft
Half duct/duct foot(other)*                         $ N/A       $ N/A
1/3 duct/duct foot (telecommunications carriers)**  $ 0.13/ft   $ 0.065/ft
1/3 duct/duct foot(cable service only)**            $ 0.13/ft   $ 0.065/ft
1/3 duct/duct foot(other)**                         $ N/A       $ N/A
</TABLE>

              *See c)-d) below for partial duct rate.
             **See f) below for inner duct rate


        a)   Facility footage shall be measured i) from the center of one
             manhole to the center of an adjacent manhole if the facility runs
             between two manholes, ii) from the center of a manhole to  the end
             of a duct not terminated in a manhole, or iii) from the center of
             a manhole to the property line if the duct is connected at the
             property line to a duct owned and controlled by a third-party
             property owner.

        b)   Semiannual full duct conduit occupancy fees will apply to the
             first facility placed in a previously unoccupied duct except as
             provided in c)-d) below.


<PAGE>   284
                                   APPENDIX I
            SCHEDULE OF FEES AND CHARGES (OKLAHOMA) -- PAGE 3 OF 4



            c)   If two or more facilities occupy a duct that has not been
                 subdivided by inner duct, a semiannual half duct conduit
                 occupancy fee will be charged for each facility placed in the
                 duct.

            d)   A semiannual half duct occupancy fee will apply to the first
                 facility placed by Applicant in a previously unoccupied duct
                 that has not been subdivided by inner duct if and only if the
                 presence of Applicant's facility does not render the other half
                 of the duct unusable by others.

            e)   As ordered by the State Commission, when Applicant's facilities
                 are installed within inner duct, a single semiannual one-third
                 duct conduit occupancy fee will apply to each inner duct
                 occupied.

C)   Application Fees. No application fees shall be charged for the submission
     of access applications or provisional space assignments.

D)   Pre-license Survey Work.  Charges for pre-license survey work are not set
     on a fixed fee basis and will be determined on a case-by-case.  If
     pre-license survey work is performed by SWBT's contractors, Applicant
     shall reimburse SWBT for the actual out-of-pocket costs incurred by SWBT
     for such work.  If pre-license survey work is performed by SWBT employees,
     pre-license survey charges shall be computed by multiplying the applicable
     hourly rates times the number of hours reasonably spent by SWBT's
     employees on pre-license survey work.

E)   Facilities Modification, Capacity Expansion, and Make-ready Work. Charges
     for facilities modification, capacity expansion, and make-ready work are
     not set on a fixed fee basis and will be determined in a case-by-case
     basis. In all cases, except as otherwise specifically provided to the
     contrary in the Master Agreement, such charges shall include the costs of
     materials required to perform the work. If such work is performed by SWBT's
     contractors, Applicant shall reimburse SWBT for the actual out-of-pocket
     costs incurred by SWBT for such work. If such work is performed by SWBT
     employees, charges for such work shall be computed by multiplying the
     applicable hourly rates times the number of hours reasonably spent by
     SWBT's employees on the work. No later than 45 days after receipt by SWBT
     of Applicant's completed application, or within such other period as may be
     mutually agreed upon in writing by the parties, SWBT will furnish Applicant
     an estimate of the charges for make-ready work. SWBT shall not be required
     to perform the make-ready work until Applicant has prepaid the estimated
     make-ready charges in full. After make-ready work has been completed by
     SWBT, Applicant shall pay SWBT the difference between the estimated
     make-ready charges and the actual charges, if the actual charges are
     greater than the estimate, or SWBT shall refund to Applicant the difference
     between the estimated make-ready charges and the actual charges, if the
     actual charges are less than the estimate.




<PAGE>   285


                                   APPENDIX I
            SCHEDULE OF FEES AND CHARGES (OKLAHOMA) -- PAGE 4 OF 4

F)   Construction Inspectors.  Subject to all applicable commission orders,
     where work is being performed on Applicant's behalf in SWBT's manholes or
     other portions of SWBT's conduit system, Applicant shall pay SWBT's full
     costs attributable to having a construction inspector present; provided,
     however, that SWBT shall not charge Applicant for more than one such
     construction inspector per site at any given time.  If the construction
     inspector is a SWBT contractor, Applicant shall reimburse SWBT for the
     actual out-of-pocket costs incurred by SWBT in connection with the
     presence of such inspector.  If the construction inspector is a SWBT
     employee, charges for the construction inspector shall be computed by
     multiplying the applicable hourly rate times the number of hours
     reasonably spent by the employee as a construction inspector in connection
     with the project.

G)   Other Work Performed Pursuant to the Master Agreement.  For all other
     work performed by SWBT's contractors pursuant to this Agreement, including
     but not limited to work performed in opening manholes and participating in
     work operations at Applicant's request, Applicant shall reimburse SWBT for
     the actual out-of-pocket costs incurred by SWBT in connection with the
     performance of such work.  For all other work performed by SWBT's
     employees pursuant to this Agreement, including but not limited to work
     performed in opening manholes, providing access to and copies of records,
     and participating in work operations at Applicant's request, SWBT's
     charges shall be computed by multiplying the applicable hourly rates times
     the number of hours reasonably spent by SWBT's employees on such work.

H)   Contract Administration Fee and Administrative Record-keeping Fees. A one
     time contract administration fee of $250.00 shall be due and payable at the
     time of the execution of the Master Agreement. SWBT may charge
     administrative record-keeping fees not exceeding $125.00 in connection with
     records and billing changes resulting from the sale, consolidation, or
     other transfer of Applicant's business or facilities, name changes, and the
     like. SWBT shall provide Applicant, on Applicant's request, a statement of
     the basis for the fees.

I)   Other Administrative and Ancillary Fees.  No other administrative or
     ancillary fees are charged by SWBT on a fixed fee basis.

J)   Hourly Rates. Except as otherwise provided by any applicable law, rule,
     regulation, or commission order, hourly rates charged for SWBT employees
     shall be such employees' fully loaded hourly rates.

K)   Payment Date. For fees and charges other than charges for make-ready work,
     each bill or invoice submitted by SWBT to Applicant shall state the date
     that payment is due, which date shall be not less than 60 days after the
     date of the bill or invoice. For make-ready work, the payment due date
     shall be not less than 30 days after the date of the bill or invoice.
     Interest on past due charges shall accrue as provided in Section 19.11(a)
     of the Master Agreement.


<PAGE>   286




                                                     Agreement No. _____________

                                  APPENDIX II

                     IDENTIFICATION OF APPLICANT (OKLAHOMA)

     This Appendix is an integral part of the Master Agreement for Access to
Poles, Ducts, Conduits, and Rights-of-Way to which it is attached.

Applicant's legal name is:
                          ------------------------------------------------------

- -------------------------------------------------------------------------------.

Applicant's principal place of business is located in the State of
                                                                  -------------.

Applicant does business under the following assumed names:
                                                          ----------------------

- --------------------------------------------------------------------------------

- -------------------------------------------------------------------------------.

Applicant is:

      [ ] a corporation organized under the laws of the State of
                                 , charter no.                  ;
          -----------------------             ------------------

      [ ] a partnership organized under the laws of the State of
                               ; or
          ---------------------

      [ ] another entity, as follows:
                                     -------------------------------------------

          ---------------------------------------------------------------------.

Applicant represents that Applicant is:

      [ ] (1) a cable system (as defined in 47 U.S.C. Sections 153(37) and
          522(7)) seeking a pole attachment or conduit occupancy license
          solely to provide cable service (as defined in 47 U.S.C. Section
          522(6);

      [ ] (2) a telecommunications carrier, as defined in 47 U.S.C.
          Section 153(49), as modified by 47 U.S.C. Section 224, or

      [ ] (3) a person or entity which is neither (1) nor (2) above,
          as follows:

       ------------------------------------------------------------------

<PAGE>   287

                                                             Agreement No. _____

                                  APPENDIX III

                  ADMINISTRATIVE FORMS AND NOTICES (OKLAHOMA)

     This Appendix is an integral part of the Master Agreement for Access to
Poles, Ducts, Conduits, and Rights-of-Way to which it is attached and contains
administrative forms referred to in the Master Agreement or used in connection
with the provision of access to SWBT's poles, ducts, conduits, and
rights-of-way. The forms are forms presently in use and have not been conformed
to the Master Agreement. The forms may be further revised by SWBT to conform to
the Master Agreement and revised from time to time to reflect changes in the
applicable law, changes in the Master Agreement, and changes in the procedures
through which access to poles, ducts, conduits, and rights-of-way is afforded by
SWBT to Applicant and others.

<TABLE>
<S>        <C>
SW-9433:   Pole Attachments

SW-9434:   Access Application and Make-Ready Authorization

SW-9435:   Conduit Occupancy

SW-9436A:  Notification of Surrender or Modification of Pole Attachment License
           by Licensee

SW-9436B:  Notification of Surrender or Modification of Conduit Occupancy
           License by Applicant

SW-9436C:  Notification of Unauthorized Attachments by Applicant
</TABLE>


<PAGE>   288
<TABLE>
<S><C>


      [SOUTHWESTERN BELL TELEPHONE LOGO]
      Retention Period:  Active, Plus Five Years                                 Pole Attachments                    PAGE ___ OF __
      FIRM'S NAME:_____________________________                   [ ]  Provisional, Records Based Assignment
      AGREEMENT No:____________________________                              [ ] Pre-Occupancy Survey                 TYPE:_________
      APPLICATION No:__________________________
                                                                                                              (CATV, Telecom, Other)
- ----------------------------------------------------------------------------------------------------------------------------------
Item  Record     Pole   Ownership    Street        Proposed     Guy        Make Ready          Make Ready         Pole Mntd
- ----------------------------------------------------------------------------------------------------------------------------------
 #      #         #      SWBT or    Address       Attachment    Rq'd          Work            Description         Apparatus
- ----------------------------------------------------------------------------------------------------------------------------------
                         Power                     Height      Y or N       Y or N                                Height
- ----------------------------------------------------------------------------------------------------------------------------------
1
- ----------------------------------------------------------------------------------------------------------------------------------
2
- ----------------------------------------------------------------------------------------------------------------------------------
3
- ----------------------------------------------------------------------------------------------------------------------------------
4
- ----------------------------------------------------------------------------------------------------------------------------------
5
- ----------------------------------------------------------------------------------------------------------------------------------
6
- ----------------------------------------------------------------------------------------------------------------------------------
7
- ----------------------------------------------------------------------------------------------------------------------------------
8
- ----------------------------------------------------------------------------------------------------------------------------------
9
- ----------------------------------------------------------------------------------------------------------------------------------
10
- ----------------------------------------------------------------------------------------------------------------------------------
11
- ----------------------------------------------------------------------------------------------------------------------------------
12
- ----------------------------------------------------------------------------------------------------------------------------------
13
- ----------------------------------------------------------------------------------------------------------------------------------
14
- ----------------------------------------------------------------------------------------------------------------------------------
15
- ----------------------------------------------------------------------------------------------------------------------------------
16
- ----------------------------------------------------------------------------------------------------------------------------------
17
- ----------------------------------------------------------------------------------------------------------------------------------
18
- ----------------------------------------------------------------------------------------------------------------------------------
19
- ----------------------------------------------------------------------------------------------------------------------------------
20
- ----------------------------------------------------------------------------------------------------------------------------------
      TOTAL
- ----------------------------------------------------------------------------------------------------------------------------------
                 Number of Cables_____________________                    Other Notes:______________________________________
- ----------------------------------------------------------------------------------------------------------------------------------
                 Weight/per ft. and Size/O.D. ____________                ________________________________________________
- ----------------------------------------------------------------------------------------------------------------------------------
                 Number and Types of Strands____________                  ________________________________________________
- ----------------------------------------------------------------------------------------------------------------------------------
                                                                   Date:_____________
                                                                   Time:_____________
SIGNED:____________________________________                                                    SIGNED:____________________________
      SWBT Representative                                                                             Applicant's Representative
                                           [  ]    Official File Copy, If Checked in Red

</TABLE>


<PAGE>   289


                                     SW9433
                                POLE ATTACHMENTS
                                FORM INSTRUCTIONS

From SW9433 may be used for the following two purposes, Provisional, Records
Based Assignment or as the Pre-Occupancy Survey. The applicant may complete the
SW9433 and submit this to SWBT while reviewing the records and make a
Provisional, Records Based Assignment. The applicant will also use this form
when making the Pre-Occupancy Survey as a reference sheet of information
required for acquiring pole attachment space

REQUIRED INFORMATION FOR PROVISIONAL, RECORDS BASED ASSIGNMENT

FIRM'S NAME:  Name of firm requesting pole attachment space.

AGREEMENT No.:   Number obtained from the Master Agreement Number.

APPLICATION No.: Will be provided by applicant in sequential ascending order.

[ ] Provisional, Records Based Assignment: Applicable when an applicant elects
to a Provisional, Records Based Assignment. The form will be signed and dated at
the bottom by both the applicant and the SWBT representative. A copy will be
provided to the applicant and the original will be maintained by SWBT.

Type:  The applicant states that they are a CATV, a Telecommunications Carrier
or a firm other than the aforementioned two.

Record #: The SWBT paper record or the SWBT mechanized record number.

Pole #: Applicant will supply the pole number either from the SWBT Records or
from a field visit.

Ownership:  Applicant will determine and post the ownership of the pole by
marking S for SWBT or P for Power Company based on SWBT's records.

Street Address:  Applicant will provide street address or geographical
reference point of the pole.

Proposed Attachment Height:  Applicant will provide the proposed attachment
height in feet and inches on the pole.

Guy Rq'd:  Not required for Provisional, Records Based assignment.

Make Ready Work:  Not required for Provisional, Records Based assignment.

Make Ready Description:  Not required for Provisional, Records Based
assignment.

Pole Mntd Apparatus Height:  Not required for Provisional, Records Based
assignment.

Weight/per ft. and Size/O.D.:  Applicant will provide.

Number and Types of Strands:  Applicant will provide the number and types of
strands.

Other Notes:  Any other notes relevant to the request including any infrequent
construction techniques.

Date:  The date the Provisional, Records Based Assignment was made.

Time:  The time the Provisional, Records Based Assignment was made.

Signed (Applicant's Representative):  Applicant's Representative signs that the
Provisional, Records Based Assignment was made.

Signed (SWBT Representative):  SWBT's Representative signs that the
Provisional, Records Based Assignment was made.

<PAGE>   290


REQUIRED INFORMATION FOR PRE-OCCUPANCY SURVEY

FIRM'S NAME:  Name of firm requesting pole attachment space.

AGREEMENT No.:  Number obtained from the Master Agreement Number.

APPLICATION No.:  Will be provided by SWBT.

[ ] Pre-Occupancy Survey: This would be checked when this form is being used as
a Pre-Occupancy Survey. The form would be completed in its entirety and signed
by the applicant and submitted to SWBT for review in obtaining pole attachment
space.

Type:  The applicant states that they are a CATV, a Telecommunications Carrier
or a firm other than the aforementioned two.

Record #: The SWBT paper record or mechanized record number.

Pole #: Applicant will supply the pole number either from the SWBT Records or
from a field visit.

Ownership:  Applicant will determine and post the ownership of the pole by
marking S for SWBT or P for Power Company.

Street Address:   Applicant will provide street address or geographical
reference point of the pole.

Proposed Attachment Height:   Applicant will provide the proposed attachment
height in feet and inches on the pole.

Guy Rq'd:  Applicant will state if a guy is required. (Yes or No).

Make Ready Work:  Applicant will state if make ready work is required. (Yes or
No)

Make Ready Description:   Applicant will give description of make ready work
required.

Pole Mntd Apparatus Height:  Applicant will state any proposed apparatus that
would be placed on the pole.   (Terminal, etc.)

Number of Cables:  Applicant will state the number of cables that will be
placed on the pole.

Weight/per ft. and Size/O.D.:  Applicant will provide.

Number and Types of Strands:  Applicant will provide the number and types of
strands.

Other Notes:  Any other notes relevant to the request including any infrequent
construction techniques.

Date:  The date the Pre-Occupancy Survey was submitted to SWBT.

Time:  The time the Pre-Occupancy Survey was submitted to SWBT.

Signed (Applicant's Representative):  Applicant's Representative signs when
Pre-Occupancy Survey was submitted to SWBT.

Signed (SWBT Representative): SWBT's Representative signs when Pre-Occupancy
Survey was submitted to SWBT.


<PAGE>   291

<TABLE>
<S><C>
[SOUTHWESTERN BELL TELEPHONE LOGO]

                                                 Access Application and Make-Ready
                                                 Authorization
Retention Period, Active, plus 5 years           (Request for Access to Poles, Ducts, Conduit)

Name of Applicant______________________________________________________________
Agreement No.__________________________________________________________________
Application No.________________________________________________________________

                             Provisional Assignment

As specified in the attached documents, and in accordance with the terms and
conditions of the Master Agreement between SWBT and Applicant, application is
hereby made for a provisional assignment of space in anticipation of a
nonexclusive license of communication facilities to access the quantity of SWBT
facilities indicated below: 

     ______ SWBT poles   _____ Feet SWBT Whole Duct    _______ Feet SWBT Innerduct 

Applicant desires immediate assignment of space and acknowledges that the 
effective date is ____________________. Applicant agrees to provide an 
application for assignment/access/occupancy of the assigned space within 30 
days from the date of the assignment, or forfeit the assignment.
          Expiration Date:___________________

                           Assignment/Access/Occupancy

As specified in the attached documents, and in accordance with the terms and
conditions of the Master Agreement between SWBT and Applicant, application is
hereby made for occupancy of space through a nonexclusive license of
communication facilities to access the quantity of SWBT facilities indicated
below: 

     ______ SWBT poles   ______ Feet SWBT Whole Duct   _______ Feet SWBT Innerduct

Applicant authorizes SWBT to perform the required pre-licensing survey including
any field inspections required to evaluate capacity, safety, reliability, and
engineering standards; and to determine the cost, if any of required
modifications or make-ready work. 
          Expiration Date:_____________________

Applicant's Estimated Construction Start Date:________________________

Applicant's Estimated Construction Completion Date:___________________

Authorized by Applicant:________________________________________ 
                              Signature                Title
     Date:____________________________


                                 Make-Ready Work

Estimated Costs                                 Hours                    Rate           Total

Constr. Labor                                    ---        x             $               $
                                                                          ------          --------
Material                                         XXX        x             $  XXX          $
                                                 ---                      ------          --------
Engr. Design                                                x             $               $
                                                 ---                      ------          --------
Total                                                                                     $
                                                                                          --------

Estimated SWBT Completion Date

[ ] No Make-Ready Work Required.              [ ]  No Make-Ready Work Required under 8.03(a)
[ ] Make-Ready Work will be completed by applicant's authorized contractor.
[ ] I authorize SWBT to complete the required make-ready work.  Payments due 
    upon 50% completion and 100% completion.  Costs will be based upon actual 
    costs incurred by SWBT.  (This may vary depending on state)

___________________________________________________           Date:_____________________________
 Applicant's Signature                        Title

License No._____________________________    Authorized by SWBT:_________________________________
Date:_________________________                                 Signature           Title
                   [ ] Official File Copy, If Checked In Red
</TABLE>



<PAGE>   292


                                    SW-9434
                ACCESS APPLICATION and MAKE-READY AUTHORIZATION
                               FORM INSTRUCTIONS
                                     5/5/97

Form SW-9434 is used to request access to poles, ducts, and conduit; to transmit
notice of Provisional Assignments; and to provide other information required in
the access process.

REQUIRED INFORMATION

NAME OF APPLICANT.  Name of firm requesting on poles or in conduit.

AGREEMENT NO.   Number obtained from the Master Agreement Number.

APPLICATION NO.   Will be provided by applicant in sequential ascending order.

PROVISIONAL ASSIGNMENT BOX DATA

      "ATTACHED DOCUMENTS" Copies of the Assignment Of Space Logs showing the
      applicant's entries for the requested space or completed Forms SW-9433 or
      SW-9435 if appropriate. Assignment is not official until the required data
      is entered in the Assignment Of Space Log.

      ___   SWBT POLES The number of poles for which space is requested.

      ___   FEET SWBT WHOLE DUCT The accumulated Center-to-Center measurements
            for the Whole Duct to be occupied. To be used ONLY FOR CABLES TOO
            LARGE IN DIAMETER (Typically copper conductor cables.) to fit in
            SWBT standard innerduct

      ___   FEET SWBT INNERDUCT The accumulated Center-to-Center measurements
            for the innerduct to be occupied.

      Effective date is date entered in Assignment Of Space Log

      PROVISIONAL ASSIGNMENT EXPIRATION DATE:   30 calendar days from the date
           entered in the Assignment of Space Log (i.e., Date Application must
           be submitted to hold the assignment of space.)

ASSIGNMENT/ACCESS/OCCUPANCY BOX DATA

      "ATTACHED DOCUMENTS"  Completed Forms SW-9433 and/or SW-9435.

      ___   SWBT POLES The number of poles to be accessed.

      ___   FEET SWBT WHOLE DUCT The accumulated Center-to-Center measurements
            for the Whole Duct to be occupied. To be used ONLY FOR CABLES TOO
            LARGE IN DIAMETER (Typically copper conductor cables.) to fit in
            SWBT standard innerduct

      ___   FEET SWBT INNERDUCT The accumulated Center-to-Center measurements
            for the innerduct to be occupied.

      EFFECTIVE DATE IS date entered in Assignment Of Space Log

      ASSIGNMENT EXPIRATION DATE: 12 Months from the date entered in Assignment 
      Of Space Log
            (Date facilities must be placed to avoid forfeiture of assigned 
            space.)

                                     PAGE 1


<PAGE>   293



                                    SW-9434
                ACCESS APPLICATION AND MAKE-READY AUTHORIZATION
                               FORM INSTRUCTIONS
                                     5/5/97

APPLICANT'S ESTIMATED CONSTRUCTION START DATE:  Current "best estimate" of the
date project construction will begin. "ASAP" is not an acceptable date.

APPLICANT'S ESTIMATED CONSTRUCTION COMPLETION DATE:  Current "best estimate" of
the date placements and splicing will be completed.  "ASAP" is not an
acceptable date.

AUTHORIZED BY APPLICANT: Signature and Title of the Applicant's representative
authorizing the request for access and payment (if any) of related SWBT
engineering charges in connection with such access.

DATE: Date of authorization by Applicant's representative.

MAKE-READY WORK BOX DATA

      ESTIMATED COSTS: SWBT will calculate data for Construction Labor,
      Material, and Engineering Design hours and summarize the TOTAL estimated
      SWBT Make-Ready Costs. 

      ESTIMATED SWBT COMPLETION DATE SWBT Engineering will provide the estimated
      completion date of SWBT Make-Ready Work based upon current scheduling
      loads.

      [ ] NO MAKE-READY WORK REQUIRED. Applicant should check this box if it has
      determined that fully code/specifications-compliant access can be granted
      without any work or modifications by SWBT or other parties. If inner duct
      must be placed, box should not be checked.

      [ ] MAKE-READY WORK will be completed by Applicant's authorized
      contractor. If Applicant plans to utilize a mutually approved authorized
      contractor to perform all the Make-Ready work, this box only should be
      checked.

      [ ]  I AUTHORIZE SWBT TO COMPLETE THE REQUIRED MAKE READY WORK....  If
      Applicant wants SWBT to perform all the Make-Ready Work, this box only 
      should be checked.

      IF SOME MAKE-READY WORK MUST BE DONE BY SWBT AND SOME WILL BE DONE BY THE
      APPLICANT'S AUTHORIZED COMPACTOR, THE LAST TWO BOXES SHOULD BE CHECKED. A
      DETAILED DESCRIPTION OF THE WORK TO BE DONE BY SWBT MUST BE INCLUDED.

      APPLICANT'S SIGNATURE, TITLE AND DATE:

            If the No Make-Ready Work Required box is checked by Applicant,
            Applicant's Signature confirms the accuracy of the current Applicant
            construction schedule. If the Not Make-Ready Work Required under
            8.03(a) box is checked, Applicant confirms conditions under 8.03
            Immediate Occupancy apply.

            If Make-Ready Work will be completed by Applicant's Authorized
            contractor is checked, Applicant's signature concurs with any
            changes in proposed Make-Ready work identified by SWBT and confirms
            the accuracy of the current schedule.

            If SWBT will perform any Make-Ready Work, Applicant's signature
            authorizes payment to SWBT of actual cost to perform the required
            make-ready work.

LICENSE NO. ______ AUTHORIZED BY SWBT: The SWBT State ULS will authorize, date,
and issue the License No. on the SW-9434 which becomes the Applicant's License
For Access.


                                     PAGE 2

<PAGE>   294

<TABLE>
<S><C> 


[SOUTHWESTERN BELL TELEPHONE LOGO]
Retention Period:  Active, Plus Five Years                                   Conduit Occupancy                    PAGE ___ OF ____
FIRM'S NAME:_____________________________                      [  ]  Provisional, Records Based Assignment
AGREEMENT No.:___________________________                                [  ] Pre-Occupancy Survey                 TYPE:__________
APPLICATION No.:__________________________
                                                                                                              (CATV, Telecom, Other)
Item       Oper.      Record      Manhole          Street          Distance To    Proposed   Make Ready           Make Ready
- ------------------------------------------------------------------------------------------------------------------------------------
    #          #          #          #            Address         Next  Manhole   Duct or       Work             Description
- ------------------------------------------------------------------------------------------------------------------------------------
                                                                   (Ctr to Ctr)   Innerduct    Y or N
- ------------------------------------------------------------------------------------------------------------------------------------
    1
- ------------------------------------------------------------------------------------------------------------------------------------
    2
- ------------------------------------------------------------------------------------------------------------------------------------
    3
- ------------------------------------------------------------------------------------------------------------------------------------
    4
- ------------------------------------------------------------------------------------------------------------------------------------
    5
- ------------------------------------------------------------------------------------------------------------------------------------
    6
- ------------------------------------------------------------------------------------------------------------------------------------
    7
- ------------------------------------------------------------------------------------------------------------------------------------
    8
- ------------------------------------------------------------------------------------------------------------------------------------
    9
- ------------------------------------------------------------------------------------------------------------------------------------
   10
- ------------------------------------------------------------------------------------------------------------------------------------
   11
- ------------------------------------------------------------------------------------------------------------------------------------
   12
- ------------------------------------------------------------------------------------------------------------------------------------
   13
- ------------------------------------------------------------------------------------------------------------------------------------
   14
- ------------------------------------------------------------------------------------------------------------------------------------
   15
- ------------------------------------------------------------------------------------------------------------------------------------
   16
- ------------------------------------------------------------------------------------------------------------------------------------
   17
- ------------------------------------------------------------------------------------------------------------------------------------
   18
- ------------------------------------------------------------------------------------------------------------------------------------
   19
- ------------------------------------------------------------------------------------------------------------------------------------
   20
- ------------------------------------------------------------------------------------------------------------------------------------
TOTAL
- ------------------------------------------------------------------------------------------------------------------------------------
           Number of Cables_____________________                  Splice Information Manhole  # __________________________, Details
- ------------------------------------------------------------------------------------------------------------------------------------
           Size of Cable (O.D. Inches)______________              Splice Information Manhole  #___________________________, Details
- ------------------------------------------------------------------------------------------------------------------------------------
                                                                  Slack Loop Info. Manhole..#_____________________________, Details
- ------------------------------------------------------------------------------------------------------------------------------------
                                                                  Slack Loop Info. Manhole..#_____________________________, Details
- ------------------------------------------------------------------------------------------------------------------------------------
                                                           Date:_____________

                                                           Time:_____________
SIGNED:____________________________________                                            SIGNED:____________________________________
       SWBT Representative                                                                              Applicant's Representative
                                       [ ]  Official File Copy, If Checked in Red
         
</TABLE>


<PAGE>   295

                                     SW9435
                               CONDUIT OCCUPANCY
                               FORM INSTRUCTIONS

     From SW9435 may be used for the following two purposes, Provisional,
     Records Based Assignment or as the Pre-Occupancy Survey. The applicant may
     complete the SW-9435 and submit this to SWBT while reviewing the records
     and make a Provisional, Records Based Assignment. The applicant will also
     use this form when making the Pre-Occupancy Survey as a reference sheet of
     information required for acquiring duct and/or inner duct space.

     REQUIRED INFORMATION FOR PROVISIONAL, RECORDS BASED ASSIGNMENT

     FIRM'S NAME:   Name of firm requesting conduit space.

     AGREEMENT No.:   Number obtained from the Master Agreement Number.

     APPLICATION No. Will be provided by applicant in sequential ascending
     order.

     [ ] Provisional, Records Based Assignment: Applicable when an applicant
     would make a Provisional, Records Based Assignment. The form will be signed
     and dated at the bottom by both the applicant and the SWBT representative.
     A copy will be provided to the applicant and the original will be
     maintained by SWBT.

     Type: Applicant indicates that they are a CATV, a Telecommunications
     Carrier or a firm other than the aforementioned two.

     Record #: This would refer to either the SWBT paper record or the SWBT
     mechanized record number.

     Manhole #: Applicant will supply each manhole number.

     Street Address: Applicant will provide street address of the manhole, it
     applicable.

     Proposed Duct or Inner duct: Applicant will state the number of ducts
     and/or inner ducts.

     Make Ready Work: Not required for Provisional, Records Based assignment.

     Make Ready Description: Not required for Provisional, Records Based
     assignment.

     Number of Cables:   Applicant will enter the number of cables.

     Size of Cable (O.D. Inches):  Applicant will enter size of cable.

     Splice Information Manhole #: Not required for Provisional, Records Based
     assignment.

     Details: Not required for Provisional, Records Based assignment.

     Slack Loop Info. Manhole #: Not required for Provisional, Records Based
     assignment.

     Details:   Not required for Provisional, Records Based assignment.

     Date:   The date the Provisional, Records Based Assignment was made.

     Time:   The time the Provisional, Records Based Assignment was made.

     Signed (Applicant's Representative): Applicant's Representative signs that
     the Provisional, Records Based Assignment was made. 

     Signed (SWBT Representative): SWBT's Representative signs that the 
     Provisional, Records Based Assignment was made.


<PAGE>   296

     REQUIRED INFORMATION FOR PRE-OCCUPANCY SURVEY

     FIRM'S NAME: Name of firm requesting conduit space.

     AGREEMENT No.: Number obtained from the Master Agreement Number.

     APPLICATION No. Will be provided by applicant in sequential ascending
     order.

     [ ] Pre-Occupancy Survey: Applicable when this form is used as a
     Pre-Occupancy Survey. The form would be completed in its entirety by the
     applicant and submitted to SWBT for review in obtaining conduit space.

     Type: Applicant indicates that they are a CATV, a Telecommunications
     Carrier or a firm other than the aforementioned two.

     Oper. #: Applicant will provide the operation number when required. The
     same operation number may very well be referenced on an attached map.

     Record #: This would refer to either the SWBT paper record or the SWBT
     mechanized record number.

     Manhole #: Applicant will supply each manhole number.

     Street Address: Applicant will provide street address of the manhole, it
     applicable.

     Distance to Manhole: Applicant will state the distance from manhole to
     manhole in fact.

     Proposed Duct or Inner duct: Applicant will state the number of ducts
     and/or inner ducts.

     Make Ready Work: Applicant will state if make ready work is required. (Yes
     or No)

     Make Ready Description: Applicant will give description of make ready work
     required.

     Number of Cables: Applicant will indicate the number of cables.

     Size of Cable (O.D. Inches): Applicant will enter size of cable.

     Splice Information Manhole #: Applicant will enter any relevant splice
     information.

     Details: Applicant will provide any relevant details regarding splice
     information.

     Slack Loop Info. Manhole #: Applicant will provide.

     Details:  Applicant will provide any relevant Slack Loop Information.

     Date:   The date the Pre-Occupancy Survey was submitted to SWBT.

     Time:   The time the Pre-Occupancy Survey was submitted to SWBT.

     Signed (Applicant's Representative): Applicant's Representative signs when
     Pre-Occupancy Survey was submitted to SWBT.

     Signed (SWBT Representative): SWBT's Representative signs when
     Pre-Occupancy Survey was submitted to SWBT.


<PAGE>   297

[SOUTHWESTERN BELL TELEPHONE LOGO]

                   NOTIFICATION OF SURRENDER OR MODIFICATION
                     OF POLE ATTACHMENT LICENSE BY LICENSEE


                                                              Page ____ of _____

                                                Agreement Number________________

                                                ________________________________
                                                (Licensee)

                                                ________________________________
                                                (Address)

                                                ________________________________

SOUTHWESTERN BELL TELEPHONE COMPANY:
In accordance with the terms and conditions of the License Agreement between 
us, dated _________, 19__, notice is hereby given that the licenses covering 
attachments to the following poles and/or anchors and/or utilization of 
anchor/guy strand is surrendered (or modified as indicated in Licensee's prior 
notification to Licensor, dated ___________________, 19___) effective
_____________________.


<TABLE>
<CAPTION>
<S><C>
                                                                                      
                                                                                      DATE FAC.   
                       ANCHOR  A/GS                                                   RMVD. OR  
   POLE NO.          (ASSOC. POLE NO.)  LIC. NO. & DATE  SURRENDEER OR MODIFICATION   MODIFIED
- ----------------------------------------------------------------------------------------------
1
- ----------------------------------------------------------------------------------------------
2
- ----------------------------------------------------------------------------------------------
3
- ----------------------------------------------------------------------------------------------
4
- ----------------------------------------------------------------------------------------------
5
- ----------------------------------------------------------------------------------------------
6
- ----------------------------------------------------------------------------------------------
7
- ----------------------------------------------------------------------------------------------
8
- ----------------------------------------------------------------------------------------------
9
- ----------------------------------------------------------------------------------------------
10
- ----------------------------------------------------------------------------------------------
11
- ----------------------------------------------------------------------------------------------
12
- ----------------------------------------------------------------------------------------------
13
- ----------------------------------------------------------------------------------------------
14
- ----------------------------------------------------------------------------------------------
15
- ----------------------------------------------------------------------------------------------
Date Notification Received _____________________                        
Date Modification Accepted _____________________                    __________________________       
By _____________________________________________                         Name of  Licensee            
Discontinued:                                                
                                                                      
                     Poles _____________________              By______________________________      
                     Anchors____________________              
                     Anchor/Guy Strands_________              Title___________________________
</TABLE>

<PAGE>   298
[SOUTHWESTERN BELL TELEPHONE LOGO]


                   NOTIFICATION OF SURRENDER OR MODIFICATION
                   OF CONDUIT OCCUPANCY LICENSE BY APPLICANT

                                                              Page ____ of _____

License Agreement # ___________________         ________________________________
                                                (Applicant)

                                                ________________________________
                                                (Address)

                                                ________________________________

SOUTHWESTERN BELL TELEPHONE COMPANY:

In accordance with the terms and conditions of the Licensing Agreement between
us, dated ____________, 19__, notice is hereby given that the licenses covering 
occupancy of the following conduit are surrendered (or modified as indicated in 
Applicant's prior notification to SWBT, dated ___________________, 19___,) 
effective ____________.


<TABLE>
<CAPTION>
                                                                                            DATE
                                                                                          FAC. RMVD.
     CONDUIT LOCATION            LIC. NO. & DATE          SURRENDER OR MODIFICATION      OR MODIFIED
- ----------------------------------------------------------------------------------------------------
<S>                             <C>                      <C>                            <C>
1
- ----------------------------------------------------------------------------------------------------
2
- ----------------------------------------------------------------------------------------------------
3
- ----------------------------------------------------------------------------------------------------
4
- ----------------------------------------------------------------------------------------------------
5
- ----------------------------------------------------------------------------------------------------
6
- ----------------------------------------------------------------------------------------------------
7
- ----------------------------------------------------------------------------------------------------
8
- ----------------------------------------------------------------------------------------------------
9
- ----------------------------------------------------------------------------------------------------
10
- ----------------------------------------------------------------------------------------------------
11
- ----------------------------------------------------------------------------------------------------
12
- ----------------------------------------------------------------------------------------------------
13
- ----------------------------------------------------------------------------------------------------
14
- ----------------------------------------------------------------------------------------------------
15
- ----------------------------------------------------------------------------------------------------

T  Date Notification Received _____________________                   ______________________________          
B  Date Modification Accepted _____________________                             (Applicant)
W  By _____________________________________________               By________________________________                  
S  Discontinued:___________________________________                      (Name of Authorized Agent)                               
                                                                  
                Total duct footage_________________               Title_____________________________
                                                                         (Title of Authorized Agent)


</TABLE>

<PAGE>   299

                                                  Agreement No. ________________
                                  APPENDIX IV
                INSURANCE REQUIREMENTS (OKLAHOMA) -- PAGE 1 OF 4




     This Appendix IV is an integral part of the Master Agreement for Access to
Poles, Ducts, Conduits, and Rights-of-Way to which it is attached.

     1) Premises. As used in this Appendix, the term "premises" refers to any
site located on, within, or in the vicinity of SWBT's poles, ducts, conduits, or
rights-of-way and any location where Applicant or any person acting on
Applicant's behalf may be physically present while traveling to or departing
from any such site.

     2) Requirements Applicable to Applicant and All Persons and Entities Acting
on Applicant's Behalf. Applicant shall maintain, at all times during the term of
this Master Agreement, all insurance and coverages set forth below. Such
insurance and coverages shall not only cover Applicant but all contractors,
subcontractors, and other persons or entities acting on Applicant's behalf at
the premises described in 1) above. Applicant should require that all
contractors, subcontractors, and other persons or entities acting on Applicant's
behalf at premises described in 1) above obtain the same insurance and
coverages.

     3) Workers' Compensation Insurance. Applicant shall maintain, at all times
during the term of this Agreement, Workers' Compensation Insurance and
Employer's Liability Insurance with minimum limits of $100,000 for bodily
injury-each accident, $100,000 for bodily injury by disease-each employee, and
$500,000 for bodily injury by disease-policy limits, for all employees
performing work or otherwise present on the premises described in 1) above. Such
insurance must comply with the Workers' Compensation laws of this State and
shall provide coverage, at a minimum, for all benefits required by such Worker's
Compensation laws. Applicant shall require any contractor, subcontractor, or
other person or entity acting on Applicant's behalf to provide Workers'
Compensation Insurance and Employer's Liability Insurance for their respective
employees unless such employees are covered by the protection afforded by
Applicant.

     4) General Liability Insurance. To protect SWBT and any joint user from any
liability for bodily injury or property damage, Applicant shall maintain, at all
times during the term of this Agreement, General Liability insurance
satisfactory to SWBT. SWBT shall be added as an additional insured in the
standard policy or an endorsement thereto. Applicant shall also require any
contractor, subcontractor, or other person or entity acting on Applicant's
behalf to provide General Liability coverage with the same limits and with SWBT
added as an additional insured unless such contractor, subcontractor, or other
person or entity is covered by the General Liability protection afforded by
Applicant.

     a)   The following coverages must be included in (and may not be excluded 
          from) the policy or policies obtained to satisfy the General
          Liability insurance requirements of Applicant and any contractor,     
          subcontractor, or other person or entity acting on Applicant's
          behalf. The coverages may be provided by the standard policy or
          endorsements thereto. Exclusion endorsements deleting these coverages
          will not be accepted.

<PAGE>   300
[SOUTHWESTERN BELL TELEPHONE LOGO]


                                                    NOTIFICATION OF UNAUTHORIZED
                                                        ATTACHMENTS BY APPLICANT



Applicant Name_______________________


In accordance with the terms and conditions of the License Agreement between us,
dated ____________, 19__, notice is hereby given that the license covering 
attachments to the following is unauthorized (as indicated in Applicant's prior
agreement to SWBT, dated ______________________, 19___,) effective ____________.


                                           SOUTHWESTERN BELL TELEPHONE

                                           By:__________________________________

                                           Title:_______________________________


<TABLE>
<CAPTION>
     POLE NO.            LOCATION                                                               DATE FAC. 
        OR           (ASSOC. POLE NO.)                                                          RMVD. OR
     CONDUIT #       MANHOLES involved       LIC. NO. & DATE        UNAUTHORIZED ATTACHMENT     MODIFIED
- --------------------------------------------------------------------------------------------------------   
<S>                 <C>                      <C>                    <C>                        <C>
1
- --------------------------------------------------------------------------------------------------------   
2
- --------------------------------------------------------------------------------------------------------   
3
- --------------------------------------------------------------------------------------------------------   
4
- --------------------------------------------------------------------------------------------------------   
5
- --------------------------------------------------------------------------------------------------------   
6
- --------------------------------------------------------------------------------------------------------   
7
- --------------------------------------------------------------------------------------------------------   
8
- --------------------------------------------------------------------------------------------------------   
9
- --------------------------------------------------------------------------------------------------------   
10
- --------------------------------------------------------------------------------------------------------   
11
- --------------------------------------------------------------------------------------------------------   
12
- --------------------------------------------------------------------------------------------------------   
13
- --------------------------------------------------------------------------------------------------------   
14
- --------------------------------------------------------------------------------------------------------   
15
- --------------------------------------------------------------------------------------------------------   

                                                                  ______________________________________
SKETCH OF                                                                   Name of Applicant
UNAUTHORIZED
ATTACHMENTS
ATTACHED       [   ]                                             By  ___________________________________
Date Notification
Sent____________________                                         Title  ________________________________

</TABLE>

<PAGE>   301

                                  APPENDIX IV
                INSURANCE REQUIREMENTS (OKLAHOMA) -- PAGE 2 OF 4



                       1)    Personal Injury and Advertising Injury coverage.

                       2)    Premises/Operations coverage, including also
                             coverage for any newly acquired ownership or
                             controlled premises or operations.

                       3)    Independent Contractors coverage to provide
                             protection for Applicant's contractors,
                             subcontractors, and other persons or entities
                             acting on Applicant's behalf.

                       4)    Explosion, Collapse, and Underground Hazard (XCU)
                             coverage.

                       5)    Completed Operations coverage providing for bodily
                             injury and property damage liabilities which may
                             occur once the operations have been completed or
                             abandoned.

                       6)    Contractual Liability coverage to provide financial
                             responsibility for the Applicant to meet its
                             indemnification obligations.

                       7)    Broad Form Property Damage (BFPD) coverage for
                             damage to property in the care or custody of
                             Applicant and damage to work performed by or on
                             behalf of the Applicant.

                  b)   Minimum policy limits shall be as follows:

                       General Aggregate Limit: $1,000,000.

                       Sublimit for all bodily injury, property damages, or
                       medical expenses incurred in any one occurrence:
                       $1,000,000.

                       Sublimit for personal injury and advertising: $1,000,000.

                       Products/Operations Aggregate Limit: $1,000,000.

                       Each occurrence sublimit for Products/Operations:
                       $1,000,000.

                  c)   No coverage shall be deleted from the standard policy
                       without notification of individual exclusions being
                       attached for review and acceptance.

                  d)   Policy language or endorsements adding SWBT as an 
                       additional insured shall not include exclusions or
                       exceptions which defeat the purpose of protecting SWBT
                       from any liability for bodily injury or property damage
                       arising out of Applicant's operations.


<PAGE>   302

                                  APPENDIX IV
                INSURANCE REQUIREMENTS (OKLAHOMA) -- PAGE 3 OF 4

     5) Automobile Liability insurance. The parties contemplate that Applicant
and personnel acting on Applicant's behalf will utilize automobiles, trucks, and
other motor vehicles on public and private property, including public rights of
way, in the vicinity of SWBT's poles, ducts, conduits, and rights-of-way.
Accordingly, Applicant shall maintain, at all times during the term of this
Agreement, Automobile Liability insurance with minimum limits of $1,000,000
combined single limits per occurrence for bodily injury and property damage
which may arise out of the operation or use of motor vehicles of any type.
Coverage shall extend to "any auto" -- that is, coverage shall be extended to
all owned, non-owned, and hired vehicles used by Applicant or by any person or
entity acting on Applicant's behalf in connection with any work performed, or to
be performed, on, within, or in the vicinity of SWBT's poles, ducts, conduits,
or rights-of-way.

     6) Layering of General Liability and Automobile Liability coverages.
Applicant's insurance may be written via a primary policy with either an excess
or umbrella form over the primary policy. If coverage is written in this manner,
the total of the combined policy limits must meet or exceed the minimum limits
specified in this Agreement.

     7) Deductibles. No deductibles shall be allowed without the express written
consent of SWBT.

     8) Claims Made Policies. Claims Made Policies will not be accepted.

     9) Proof of Insurance. Certificates of Insurance stating the types of
insurance and policy limits provided the insured, or other proof of insurance
satisfactory to SWBT, must be received by SWBT prior to the issuance of any
licenses pursuant to this Agreement and before Applicant or any person acting on
Applicant's behalf performs any work on the premises described in 1) above.

        a)   Certificates of Insurance using the insurance industry standard 
             ACORD form are preferred.

        b)   Certificates provided with respect to General Liability policies 
             and certificates provided with respect to Automobile Liability 
             policies shall indicate SWBT as an Additional Insured.

        c)   Deductibles, if permitted, shall be listed on the Certificate of
             Insurance.

        d)   The cancellation clause on the certificate of insurance shall be
             amended to read as follows:

                  "SHOULD ANY OF THE ABOVE DESCRIBED POLICIES BE CANCELLED OR
                   MATERIALLY CHANGED BEFORE THE 

<PAGE>   303



                                  APPENDIX IV
                INSURANCE REQUIREMENTS (OKLAHOMA) -- PAGE 4 OF 4
            

                   EXPIRATION DATE, THE ISSUING COMPANY WILL MAIL 30 DAYS
                   WRITTEN NOTICE TO THE CERTIFICATE HOLDER NAMED TO THE
                   LEFT." 

             A certificate which does not include the phrase "or materially
             changed" does not meet SWBT's requirements. A certificate reciting
             that the issuing company will "endeavor to" mail 30 days written
             notice to the certificate holder does not meet SWBT's requirements.
             The language "but failure to mail such notice shall impose no
             obligation or liability of any kind upon the company, its agents,
             or representatives" or similar language must be deleted from the
             certificate.

        e)   The certificate holder shall be:

             Southwestern Bell Telephone Company
             5305 E. 71st, Floor 1
             Tulsa, Oklahoma 74136
                  ATTENTION: Utility Liaison Supervisor

        f)   Failure to object to any coverage described in a certificate shall
             not constitute written permission from SWBT to any variance from or
             alteration of any requirement set forth in this Appendix and shall
             not be construed as a waiver by SWBT of any rights under this
             Agreement.

     10) Rating of Insurers. SWBT requires that companies affording insurance
coverage have a B+VII or better rating, as rated in the current A.M. Best Key
Rating Guide for Property and Casualty Insurance Companies.

     11) Self-insurance. If authorized in the Master Agreement, self-insurance
shall be allowed in lieu of the above requirements upon Applicant's submission
of proof that it has met the self-insurance requirements stated in the Master
Agreement.

<PAGE>   304

                                                     Agreement No. _____________

                                   APPENDIX V
               NONDISCLOSURE AGREEMENT (OKLAHOMA) -- PAGE 1 OF 4


      Nondisclosure Agreement (SWBT Pole, Duct, Conduit, and Right-of-Way)

     This Nondisclosure Agreement, effective as of the ____ day of ___________
19_, has been entered into by and between Southwestern Bell Telephone Company
("SWBT"), a Missouri corporation, and the undersigned person or firm
("Recipient") as a condition of access to certain records and information
maintained by SWBT. The parties stipulate and agree as follows:

     1) SWBT maintains records and information, including but not limited to
outside plant engineering and construction records, which relate to poles,
ducts, conduits, and rights-of-way which SWBT owns or controls. SWBT represents
that such records and information are not made generally available for
inspection or copying by the public and include business, economic, and
engineering information (including but not limited to plans, designs, maps,
diagrams, cable counts and cable-specific information, circuit records, and
other competitively sensitive information) which SWBT intends to keep secret and
which has economic value by virtue of not being generally known to or readily
ascertainable by the public, including SWBT's competitors.

     2) SWBT has agreed to make certain of its records and information relating
to poles, ducts, conduits, and rights-of-way available to cable television
systems and telecommunications carriers who are presently entitled under federal
law to have access to the poles, ducts, conduits, and rights-of-way owned or
controlled by SWBT.

     3) Recipient represents that Recipient is a cable television system or
telecommunications carrier entitled under federal law to access to poles, ducts,
conduits, and rights-of-way owned or controlled by SWBT, or, if an individual,
that he or she is acting on behalf of_________________________________, which is
such a cable television system or telecommunications carrier. Recipient further
represents that Recipient is seeking access to SWBT's records and information
relating to poles, ducts, conduits, and rights-of-way for the limited purpose of
enabling engineering and construction personnel employed by or acting on behalf
of such cable television system or telecommunications carrier to make
engineering and construction decisions necessary to utilize SWBT's poles, ducts,
conduits, and rights-of-way.

     4) SWBT agrees that permitted uses of records and information concerning
SWBT's poles, ducts, conduits, and rights-of-way are (a) determining which
poles, ducts, conduits, and rights-of-way owned or controlled by SWBT are
available for use by such cable television systems or telecommunications
carriers as permitted by federal law, (b) designing, engineering, constructing,
installing, maintaining, and removing equipment which is to be attached to or
placed within such poles, ducts, conduits, and rights-of-way, and (c) contesting
decisions, if any, by SWBT not to provide access to such poles, ducts, conduits,
and rights-of-

<PAGE>   305


                                   APPENDIX V
                NONDISCLOSURE AGREEMENT (OKLAHOMA) -- PAGE 2 OF 4

way as requested. No other uses of such records or information are authorized or
permitted under this Agreement.

     5) Recipient agrees that Recipient will not use, or permit any other person
or entity to use or have access to SWBT's records and information relating to
poles, ducts, conduits, or rights-of-way or information for any purpose other
than the limited purposes stated in 4) above and that such records and
information shall not be disclosed or shared with any person or persons other
than those who have a need to know such information for such limited purposes.
Recipient specifically agrees that such records and information shall not be
used or accessed by any person involved in sales, marketing, competitive
intelligence, competitive analysis, strategic planning, and similar activities.
Recipient further agrees that Recipient shall not furnish copies of such records
or disclose information contained in such records to any person or entity which
has not executed and delivered to SWBT a counterpart of this Agreement prior to
receipt of such copies or information.

     6) Recipient agrees that Recipient will not without SWBT's express written
authorization copy, duplicate, sketch, draw, photograph, download, photocopy,
scan, replicate, transmit, deliver, send, mail, communicate, or convey any of
SWBT's records relating to poles, ducts, conduits, or rights-of-way. Recipient
further agrees that Recipient will not conceal, alter, or destroy any SWBT
records furnished to Recipient pursuant to this Agreement.

     7) Notwithstanding the provisions of 6) above, and except as provided in 8)
below, Recipient may copy, take notes from, make, and use (for the limited
purposes specified herein) drawings with reference to the following records
provided by SWBT to Recipient for inspection: pole and conduit route maps, cable
plat maps, and plant location records reflecting approximate locations of SWBT's
existing poles, ducts, conduits, and rights-of-way. All such copies, notes, and
drawings (whether in hardcopy or electronic form) shall be marked with the
legend: "PROPRIETARY INFORMATION: NOT FOR USE BY OR DISCLOSURE TO ANY PERSON WHO
HAS NOT EXECUTED A NONDISCLOSURE AGREEMENT (SWBT POLE, DUCT, CONDUIT, AND
RIGHT-OF-WAY)."

     8) No references to cable counts, cable designations or cable-specific
information, circuit information, or customer-specific information of any kind
may be included in any copies, notes, or drawings made pursuant to 7) above;
provided, however, that Recipient may make estimates regarding the physical
characteristics (such as size and weight) of the cables being surveyed when
necessary to make engineering determinations regarding the capacity, safety,
reliability, or suitability of SWBT's poles, ducts, conduits, or rights-of-way
for Recipient/Applicant's intended uses.

<PAGE>   306

                                   APPENDIX V
               NONDISCLOSURE AGREEMENT (OKLAHOMA) -- PAGE 3 OF 4

     9) All records and information relating to poles, ducts, conduits, and
rights-of-way provided to Recipient/Applicant by SWBT (whether in writing,
orally, or in electronic or other formats) shall be deemed to be proprietary
information subject to this Agreement without regard to whether such
information, at the time of disclosure, has been marked with restrictive
notations such as "Proprietary," "Restricted Proprietary," "Confidential," "Not
to Be Copied or Reproduced," or the like.

     10) This Agreement applies only to records and information provided to
Recipient by SWBT and does not apply to records and information obtained by
Recipient from other lawful sources.

     11) This Agreement does not prohibit the disclosure of records or
information in response to subpoenas and/or orders of a governmental agency or
court of competent jurisdiction. In the event Recipient receives an agency or
court subpoena requiring such disclosure, Recipient shall immediately, and in no
event later than five calendar days after receipt, notify SWBT in writing.

     12) The Parties agree that, in the event of a breach or threatened breach
of this Agreement, SWBT may seek any and all relief available in law or in
equity as a remedy for such breach, including but not limited to monetary
damages, specific performance, and injunctive relief The Parties acknowledge
that SWBT's records and information relating to poles, ducts, conduits, and
rights-of-way include valuable and unique information and that disclosure of
such information (including circuit information) will result in irreparable
injury to SWBT. In the event of any breach of this Agreement for which legal or
equitable relief is sought, SWBT shall be entitled to recover from Recipient all
reasonable attorney's fees and other reasonable costs (including but not limited
to fees of expert witnesses) incurred by SWBT in connection with the prosecution
of its claims against Recipient.

     13) This Agreement shall be effective on the effective date shown above and
shall remain in full force and effect until terminated by either party as
provided herein. Either party may, at any time, with or without cause, terminate
this Agreement by giving the other party 60 days' advance written notice of its
decision to terminate. The parties further agree that termination of this
Agreement shall have no effect on the duty of any person or entity, including
Recipient, to abide by all terms of this Agreement with respect to records and
information received by Recipient while this Agreement is in effect.

     14) This Agreement shall benefit and be binding on the parties below and
their respective heirs, successors, and assigns.

     15) This Agreement will be governed by the laws of the State of Oklahoma.

<PAGE>   307

                                   APPENDIX V
               NONDISCLOSURE AGREEMENT (OKLAHOMA) -- PAGE 4 OF 4




     16) This Agreement sets forth the entire agreement and understanding
between the parties with respect to the subject matter hereof, and none of the
terms of this Agreement may be amended or modified except by written instrument
signed by both parties.

     IN WITNESS WHEREOF, the parties hereto have executed this Agreement, or
caused this Agreement to be executed by their duly authorized representatives,
in duplicate, as of the dates set forth below.

                                      Southwestern Bell Telephone Company
      ------------------------------
      Recipient (Print or Type Name)


      By                              By
      ------------------------------  -----------------------------------
      Signature of Recipient or       Signature
      Representative                     

      ------------------------------  -----------------------------------
      Name (Printed or Typed)         Name (Printed or Typed)

      ------------------------------  -----------------------------------
      Address                         Address

      ------------------------------  -----------------------------------      
      City, State, and Zip Code       City, State, and Zip Code

      ------------------------------  -----------------------------------
      Phone                           Phone

      ------------------------------  -----------------------------------
      Date                            Date

<PAGE>   308
                                                          Agreement No._________

                                  APPENDIX VI
                        NOTICES TO APPLICANT (OKLAHOMA)

     This Appendix is an integral part of the Master Agreement for Access to
Poles, Ducts, Conduits, and Rights-of-Way to which it is attached.

     Notices in general. Except as otherwise stated in this Appendix, all
notices to Applicant shall be given to Applicant's duly authorized agent or
attorney as specified in Section 29.01 of the Master Agreement.

     Changes in notice requirements. Changes in the notice requirements set
forth in this Appendix may be made by Applicant from time to time in accordance
with the provisions of Section 29.03 of the Master Agreement.

     Special notice provisions. The following special notice provisions, if any,
shall apply:

<PAGE>   309

                                                          Agreement No._________
                                  APPENDIX VII
                   NOTICES TO SWBT (OKLAHOMA) -- PAGE 1 OF 3

     This Appendix is an integral part of the Master Agreement for Access to
Poles, Ducts, Conduits, and Rights-of-Way to which it is attached.

     Utility Liaison Supervisor (ULS). Except as otherwise stated in this
Appendix, all notices to SWBT shall be given to the Utility Liaison Supervisor
(ULS) designated in APPENDIX VIII of the Master Agreement. The Utility Liaison
Supervisor is generally responsible for coordinating applications for access to
SWBT's poles, ducts, conduits, and rights-of-way and serving as Applicant's
initial point of contact for matters arising out of or in connection with the
administration of the Master Agreement. Notices to the ULS shall be given in
writing in the manner prescribed in Section 29.02. Notices to be sent to the ULS
include, but are not limited to, notices under the following provisions of the
Master Agreement.

<TABLE>
  <S>       <C>
  7.01      Notification of Designation of Primary Point of Contact
  7.03(a)   Notification of intent to review records
  8.XX      All Notifications in Article 8
  9.XX      All Notifications in Article 9
  10.04(e)  Notification Regarding Make-Ready Work
  12.03(d)  Notification of placing J-hook on non-licensed pole
  12.04     Notification of occupation of maintenance duct for short-term use
  12.06     Notification of Applicant's maintenance contact
  13.01     Notification of planned modifications
  14.02(c)  Notification of Applicant's desire to add to or modify its existing attachment
  15.02(b)  Notification of occupation of maintenance duct for short-term emergency use
  15.03     Notification of emergency repair coordinators 
  16.01     Notification that facilities have been brought into compliance 
  17.02(c)  Disclaimer of ownership or responsibility for untagged facilities
  17.06     Notification of Applicant's response to ownership of facilities in question

</TABLE>

<PAGE>   310

                                  APPENDIX VII
                   NOTICES TO SWBT (OKLAHOMA) -- PAGE 2 OF 3

<TABLE>
  <S>       <C>
  18.01(a)  Notice of intent to remove facilities
  18.01(e)  Notice of intent to terminate license
  18.06     Notification of completion of removal of facilities
  20.01(c)  Notification of change of bond
  21.17     Notification of claims
  23.XX     All notifications of insurance coverage in Article 23
  24.03     Notification of assignment
  25.01     Notification of termination
  25.03     Notification of cure of breach
  27.04     Notice of elective termination
  29.03     Notification of change in notice requirements

</TABLE>



     Other notices. The following notices may be given orally or in writing
(including fax) and shall be given to SWBT's Local Service Provider Center
(LSPC) at 1-800-486-5598 instead of the ULS.

<TABLE>
  <S>       <C>

  6.05(a)   Notifications relating to electrical interference

  6.09(d)   Notifications of unsafe conditions

  6.11(a)   Notification of manhole entry

  6.13(c)   Notification of environmental contaminants

  10.02(b)  Notification of materials required for self-provisioning of inner
            duct

  15.04     Notification of conditions requiring emergency repair


  15.06(a)  Notification of performing corrective work on emergency repair.
            (advanced notice)


</TABLE>


<PAGE>   311

                                  APPENDIX VII
                   NOTICES TO SWBT (OKLAHOMA) -- PAGE 3 OF 3

<TABLE>
  <S>       <C>                                                                     
  15.06(b)  Notification of performing corrective work on emergency repair. (no
            advanced notice)

</TABLE>

     Additional information and questions concerning notice requirements. The
ULS, as Applicant's initial point of contact, will provide additional
information to Applicant concerning notification procedures for notices to be
given to LSPC. Questions to SWBT concerning notice requirements should be
directed to the ULS. The ULS is not authorized to provide Applicant legal advice
with respect to notice requirements. Questions by Applicant's personnel and
other persons acting on Applicant's behalf concerning Applicant's legal
obligations should be directed to Applicant's legal counsel or such other
personnel as Applicant may direct.

     Changes in notice requirements. Changes in the notice requirements set
forth in this Appendix may be made by SWBT from time to time in accordance with
the provisions of Section 29.03 of the Master Agreement.

<PAGE>   312

                                                      Agreement No. 
                                                                    ------------

                                 APPENDIX VIII
            IDENTIFICATION OF UTILITY LIAISON SUPERVISOR (OKLAHOMA)

     This Appendix is an integral part of the Master Agreement for Access to
Poles, Ducts, Conduits, and Rights-of-Way to which it is attached.

     The Utility Liaison Supervisor for Oklahoma is named below. Notices to the
Utility Liaison Supervisor should be addressed as follow:

     Name: Terrence Brennan
          ----------------------------------------------------------------------
     Title: Utility Liaison Supervisor
           ---------------------------------------------------------------------
     Firm: Southwestern Bell Telephone Company
           ---------------------------------------------------------------------
     Address: 5305 E. 71st, Floor 1
             -------------------------------------------------------------------
     City/State/Zip: Tulsa, Oklahoma 74136
                    ------------------------------------------------------------


<PAGE>   1

                                                                   Exhibit 10.23



            INTERCONNECTION, RESALE AND UNBUNDLING AGREEMENT


                                BETWEEN


                        GTE MIDWEST INCORPORATED

                       GTE ARKANSAS INCORPORATED




                                  AND




                         DIGITAL TELEPORT, INC.



<PAGE>   2




                           TABLE OF CONTENTS

<TABLE>
<S>   <C>    <C>        <C>                                                                     <C>
ARTICLE I
     SCOPE AND INTENT OF AGREEMENT.............................................................. I-1

ARTICLE II
     DEFINITIONS................................................................................II-1

1.   General Definitions........................................................................II-1
             1.1        "ACCESS SERVICE REQUEST"................................................II-1
             1.2        "ACT"...................................................................II-1
             1.3        "AFFILIATE".............................................................II-1
             1.4        "AMA"...................................................................II-1
             1.5        "APPLICABLE LAW"........................................................II-1
             1.6        "AUTOMATIC LOCATION IDENTIFICATION/DATA MANAGEMENT SYSTEM (ALI/DMS)"....II-1
             1.7        "AUTOMATIC NUMBER IDENTIFICATION" OR "ANI"..............................II-1
             1.8        "BELLCORE"..............................................................II-1
             1.9        "BILL-AND-KEEP ARRANGEMENT".............................................II-1
             1.10       "BONA FIDE REQUEST (BFR)"...............................................II-2
             1.11       "BUSINESS DAY"..........................................................II-2
             1.12       "CENTRAL OFFICE SWITCH".................................................II-2
             1.13       "CENTRALIZED MESSAGE DISTRIBUTION SYSTEM" (CMDS)........................II-2
             1.14       "CLLI CODES"............................................................II-2
             1.15       "COMMERCIAL MOBILE RADIO SERVICES" (CMRS)...............................II-2
             1.16       "COMMISSION"............................................................II-2
             1.17       "COMMON CHANNEL SIGNALING" OR "CCS".....................................II-2
             1.18       "COMPETITIVE LOCAL EXCHANGE CARRIER" (CLEC).............................II-2
             1.19       "COMPLIANCE"............................................................II-2
             1.20       "CUSTOMER"..............................................................II-2
             1.21       "CUSTOMER USAGE DATA"...................................................II-2
             1.22       "DS-1"..................................................................II-2
             1.23       "DS-3"..................................................................II-3
             1.24       "ELECTRONIC FILE TRANSFER"..............................................II-3
             1.25       "EMR"...................................................................II-3
             1.26       "E-911 SERVICE".........................................................II-3
             1.27       "EXCHANGE SERVICE"......................................................II-3
             1.28       "EIS" OR "EXPANDED INTERCONNECTION SERVICE".............................II-3
             1.29       "FACILITY"..............................................................II-3
             1.30       "FCC"...................................................................II-3
             1.31       "GENERATOR".............................................................II-3
             1.32       "GTOC"..................................................................II-3
             1.33       "GUIDE".................................................................II-3
             1.34       "HAZARDOUS CHEMICAL"....................................................II-3
             1.35       "HAZARDOUS WASTE".......................................................II-4
             1.36       "IMMINENT DANGER".......................................................II-4
             1.37       "INCUMBENT LOCAL EXCHANGE CARRIER" (ILEC)...............................II-4
             1.38       "INTERIM NUMBER PORTABILITY (INP)"......................................II-4
             1.39       "INTERCONNECTION POINT" ("IP")..........................................II-4
             1.40       "ISDN USER PART (ISUP)".................................................II-4
             1.41       "IXC" OR "INTEREXCHANGE CARRIER"........................................II-4
             1.42       "INTERNETWORK FACILITIES" OR  "INTERCONNECTION FACILITY"................II-4
</TABLE>



                                      -i-

<PAGE>   3

<TABLE>
<S>   <C>    <C>        <C>                                                                     <C>
             1.43       "LATA"..................................................................II-4
             1.44       "LINE INFORMATION DATA BASE (LIDB)".....................................II-4
             1.45       "LINE SIDE".............................................................II-4
             1.46       "LOCAL EXCHANGE CARRIER" OR "LEC".......................................II-5
             1.47       "LOCAL EXCHANGE ROUTING GUIDE" OR "LERG"................................II-5
             1.48       "LOCAL NUMBER PORTABILITY (LNP)"........................................II-5
             1.49       "LOCAL TRAFFIC".........................................................II-5
             1.50       "MDF" OR "MAIN DISTRIBUTION FRAME"......................................II-5
             1.51       "MEET-POINT BILLING" OR "MPB"...........................................II-5
             1.52       "MECAB".................................................................II-5
             1.53       "MECOD".................................................................II-5
             1.54       "MID-SPAN FIBER MEET"...................................................II-5
             1.55       "NANP"..................................................................II-5
             1.56       "NETWORK ELEMENT".......................................................II-6
             1.57       "NID" OR "NETWORK INTERFACE DEVICE".....................................II-6
             1.58       "NUMBERING PLAN AREA" OR "NPA"..........................................II-6
             1.59       "NXX", "NXX CODE", "CENTRAL OFFICE CODE" OR "CO CODE"...................II-6
             1.60       "911 SERVICE"...........................................................II-6
             1.61       "OWNER AND OPERATOR"....................................................II-6
             1.62       "POI"...................................................................II-6
             1.63       "POLE ATTACHMENT".......................................................II-6
             1.64       "PROVIDER"..............................................................II-6
             1.65       "PUBLIC SAFETY ANSWERING POINT" OR "PSAP"...............................II-6
             1.66       "RATE CENTER"...........................................................II-7
             1.67       "RIGHT-OF-WAY" OR "ROW".................................................II-7
             1.68       "ROUTING POINT".........................................................II-7
             1.69       "SERVICE CONTROL POINT" OR "SCP"........................................II-7
             1.70       "SERVICE SWITCHING POINT" OR "SSP"......................................II-7
             1.71       "SIGNALING POINT" OR "SP"...............................................II-7
             1.72       "SIGNALING SYSTEM 7" OR "SS7"...........................................II-7
             1.73       "SIGNAL TRANSFER POINT" OR "STP"........................................II-7
             1.74       "SUBSIDIARY"............................................................II-7
             1.75       "SYNCHRONOUS OPTICAL NETWORK" OR "SONET"................................II-7
             1.76       "SWITCHED ACCESS SERVICE"...............................................II-8
             1.77       "TELECOMMUNICATIONS SERVICES"...........................................II-8
             1.78       "THIRD PARTY CONTAMINATION".............................................II-8
             1.79       "TRUNK SIDE"............................................................II-8
             1.80       "UNDEFINED TERMS".......................................................II-8
             1.81       "VERTICAL FEATURES" (INCLUDING "CLASS FEATURES")........................II-8
             1.82       "WIRE CENTER"...........................................................II-8

ARTICLE III
     GENERAL PROVISIONS.........................................................................III-1

1.   Scope of General Provisions................................................................III-1

2.   Term and Termination.......................................................................III-1
             2.1        Term....................................................................III-1
             2.2        Post-Termination Arrangements...........................................III-1
             2.3        Termination Upon Default................................................III-1
             2.4        Termination Upon Sale...................................................III-1
             2.5        Liability upon Termination..............................................III-1
</TABLE>



                                      -ii-

<PAGE>   4

<TABLE>
<S>   <C>    <C>        <C>                                                                     <C>
3.   Amendments................................................................................III-2

4.   Assignment................................................................................III-2

5.   Authority.................................................................................III-2

6.   Responsibility for Payment................................................................III-2

7.   Billing and Payment.......................................................................III-2
           7.1      Dispute....................................................................III-2
           7.2      Late Payment Charge........................................................III-2
           7.3      Due Date...................................................................III-2
           7.4      Audits.....................................................................III-2

8.   Binding Effect............................................................................III-3

9.   Capacity Planning and Forecasting.........................................................III-3

10.  Compliance with Laws and Regulations......................................................III-3

11.  Confidential Information..................................................................III-3

          11.1      Identification.............................................................III-3
          11.2      Handling...................................................................III-3
          11.3      Exceptions.................................................................III-4
          11.4      Survival...................................................................III-4

12.  Consent...................................................................................III-4

13.  Cooperation on Fraud Minimization.........................................................III-4

14.  Dispute Resolution........................................................................III-4
          14.1      Alternative to Litigation..................................................III-4
          14.2      Negotiations...............................................................III-5
          14.3      Arbitration................................................................III-5
          14.4      Expedited Arbitration Procedures...........................................III-5
          14.5      Costs......................................................................III-5
          14.6      Continuous Service.........................................................III-6

15.  Entire Agreement..........................................................................III-6

16.  Expenses..................................................................................III-6

17.  Force Majeure.............................................................................III-6

18.  Good Faith Performance....................................................................III-6

19.  Governing Law.............................................................................III-6

20.  Standard Practices........................................................................III-6

21.  Headings..................................................................................III-6

22.  Independent Contractor Relationship.......................................................III-6
</TABLE>



                                     -iii-

<PAGE>   5

<TABLE>
<S>   <C>     <C>       <C>                                                                     <C>
23.  Law Enforcement Interface..................................................................III-7

24.  Liability and Indemnity....................................................................III-7
          24.1      Indemnification.............................................................III-7
          24.2      End User and Content-Related Claims.........................................III-7
          24.3      DISCLAIMER..................................................................III-8
          24.4      Limitation of Liability.....................................................III-8
          24.5      Intellectual Property.......................................................III-8

25.  Multiple Counterparts......................................................................III-8

26.  No Offer...................................................................................III-8

27.  No Third Party Beneficiaries...............................................................III-8

28.  Notices....................................................................................III-8

29.  Protection.................................................................................III-9
          29.1      Impairment of Service.......................................................III-9
          29.2      Resolution..................................................................III-9

30.  Publicity..................................................................................III-9

31.  Regulatory Agency Control..................................................................III-9

32.  Changes in Legal Requirements..............................................................III-10

33.  Effective Date.............................................................................III-10

34.  Regulatory Matters.........................................................................III-10

35.  Rule of Construction.......................................................................III-10

36.  Section References.........................................................................III-10

37.  Service Standards..........................................................................III-10
          37.1..................................................................................III-10
          37.2..................................................................................III-10
          37.3..................................................................................III-10

38.  Severability...............................................................................III-10

39.  Subcontractors.............................................................................III-10

40.  Subsequent Law.............................................................................III-10

41.  Taxes......................................................................................III-10

42.  Trademarks and Trade Names.................................................................III-11

43.  Waiver.....................................................................................III-11
</TABLE>



                                      -iv-

<PAGE>   6
<TABLE>
<S>  <C>     <C>   <C>                                                                          <C>
44.  Environmental Responsibility...............................................................III-11

45.  TBD Prices.................................................................................III-13

46.  Amendment of Certain Rates, Terms and Conditions...........................................III-13

ARTICLE IV
     GENERAL RULES GOVERNING RESOLD SERVICES
     AND UNBUNDLED ELEMENTS ....................................................................IV-1

1.   General....................................................................................IV-1

2.   Liability of GTE...........................................................................IV-1
           2.1      Inapplicability of Tariff Liability.........................................IV-1
           2.2      DTI Tariffs or Contracts....................................................IV-1
           2.3      No Liability for Errors.....................................................IV-1

3.   Unauthorized Changes.......................................................................IV-1
           3.1      Procedures..................................................................IV-1
           3.2      Option to Restrict Changes Without Evidence of Authorization................IV-2

4.   Impact of Payment of Charges on Service....................................................IV-2

5.   Unlawful Use of Service....................................................................IV-2

6.   Timing of Messages.........................................................................IV-3

7.   Procedures For Preordering, Ordering, Provisioning, Etc....................................IV-3

8.   Customer Contacts..........................................................................IV-3

ARTICLE V
     INTERCONNECTION AND TRANSPORT AND TERMINATION OF TRAFFIC...................................V-1

1.   Services Covered by This Article...........................................................V-1
           1.1      Types of Services...........................................................V-1
           1.2      Service Locations for Interconnection Services and Facilities...............V-1
           1.3      Additional Services or Service Locations....................................V-1

2.    Billing and Rates.........................................................................V-1
           2.1      Rates and Charges...........................................................V-1
           2.2      Billing.....................................................................V-1

3.    Transport and Termination of Traffic......................................................V-1
           3.1      Traffic to be Exchanged.....................................................V-1
           3.2      Compensation For Exchange Of Traffic........................................V-2
           3.3      Tandem Switching Traffic....................................................V-3
           3.4      Inter-Tandem Switching......................................................V-3

4.    Direct Network Interconnection............................................................V-3
           4.1      Network Interconnection Architecture........................................V-3
           4.2      Compensation................................................................V-4
           4.3      Trunking Requirements.......................................................V-5
</TABLE>



                                      -v-



<PAGE>   7

<TABLE>
<S>   <C>     <C>       <C>                                                                     <C>
           4.4      Network Redesigns Initiated by GTE..........................................V-6
           4.5      Interconnection Calling and Called Scopes for the Access Tandem
                    Interconnection and the End Office Interconnection..........................V-6

5.   Indirect Network Interconnection...........................................................V-6

6.   Number Resources...........................................................................V-6
           6.1      Number Assignment...........................................................V-6
           6.2      Rate Centers................................................................V-6
           6.3      Routing Points..............................................................V-6
           6.4      Code and Numbers Administration.............................................V-7
           6.5      Programming Switches........................................................V-7

7.   Interim Number Portability (INP)...........................................................V-7

8.   Meet-Point Billing.........................................................................V-7
           8.1      Meet-Point Arrangements.....................................................V-7
           8.2      Compensation................................................................V-8

9.   Common Channel Signaling...................................................................V-8
           9.1      Service Description.........................................................V-8
           9.2      Signaling Parameters........................................................V-8
           9.3      Privacy Indicators..........................................................V-8
           9.4      Connection Through STP......................................................V-8
           9.5      Third Party Signaling Providers.............................................V-8
           9.6      Multi-Frequency Signaling...................................................V-8

10.  Service Quality and Performance............................................................V-9

11.  Network Outages............................................................................V-9

ARTICLE VI
     RESALE OF SERVICES.........................................................................VI-1

1.   General....................................................................................VI-1

2.   Terms and Conditions.......................................................................VI-1
           2.1      Quality and Performance.....................................................VI-1
           2.2      Restrictions on Resale......................................................VI-1
           2.3      Restrictions on Discount of Retail Services.................................VI-1
           2.4      Resale to Other Carriers....................................................VI-2

3.    Ordering and Billing......................................................................VI-2
           3.1      Local Service Request.......................................................VI-2
           3.2      Certificate of Operating Authority..........................................VI-2
           3.3      Letter of Authorization.....................................................VI-2
           3.4      Directory Assistance Listings...............................................VI-2
           3.5      Nonrecurring Charges........................................................VI-2
           3.6      Transfers Between DTI and Another Reseller of GTE Services..................VI-2
           3.7      Local Calling Detail........................................................VI-2
           3.8      Procedures..................................................................VI-2
           3.9      LIDB........................................................................VI-2
           3.10     "OLN".......................................................................VI-3
</TABLE>



                                      -vi-

<PAGE>   8

<TABLE>
<S>   <C>     <C>       <C>                                                                     <C>
4.   Maintenance................................................................................VI-3
           4.1      Maintenance, Testing and Repair.............................................VI-3
           4.2      Specifics and Procedures for Maintenance....................................VI-3
           5.1      Description of Local Exchange Services Available for Resale.................VI-3
           5.2      List of Services Available for Resale.......................................VI-3
           5.3      Rates.......................................................................VI-4
           5.4      Grandfathered Services......................................................VI-4
           5.5      Access......................................................................VI-4
           5.6      Operator Services (OS) and Directory Assistance (DA)........................VI-4

ARTICLE VII
     UNBUNDLED NETWORK ELEMENTS.................................................................VII-1

1.   General....................................................................................VII-1

2.   Unbundled Network Elements.................................................................VII-1
           2.1      Categories..................................................................VII-1
           2.2      Prices......................................................................VII-1
           2.3      Interconnection to Unbundled Elements.......................................VII-1
           2.4      Service Quality.............................................................VII-2

3.   Network Interface Device...................................................................VII-2
           3.1      Direct Connection...........................................................VII-2
           3.2      NID to NID Connection.......................................................VII-2
           3.3      Removal of Cable Pairs......................................................VII-3
           3.4      Maintenance.................................................................VII-3

4.   Loop Elements..............................................................................VII-3
           4.1      Service Description.........................................................VII-3
           4.2      Categories of Loops.........................................................VII-3
           4.3      Conditioned Loops...........................................................VII-4
           4.4      Features, Functions, Attributes.............................................VII-4
           4.5      Digital Loop Carrier........................................................VII-4
           4.6      Unbundled Loop Facility Certification.......................................VII-4
           4.7      Unbundled Loop Facility Notification........................................VII-5
           4.8      Subloops....................................................................VII-5

5.   Port and Local Switching Elements..........................................................VII-5
           5.1      Port........................................................................VII-5
           5.2      Ports Available as Unbundled Network Elements...............................VII-6
           5.3      Port Prices.................................................................VII-6
           5.4      Local Switching.............................................................VII-6
           5.5      Compliance with Section.....................................................VII-6

6.   Transport Facility.........................................................................VII-6
           6.1      Service Description.........................................................VII-6
           6.2      Categories/Types............................................................VII-7

7.   SS7 Transport and Signaling................................................................VII-7
           7.1..................................................................................VII-7
</TABLE>



                                     -vii-

<PAGE>   9

<TABLE>
<S>  <C>     <C>       <C>                                                                      <C>
8.   LIDB Services..............................................................................VII-6

9.   Database 800-Type Services.................................................................VII-7

10.  Data Switching.............................................................................VII-7
          10.1      Access......................................................................VII-7
          10.2      Nondiscrimination...........................................................VII-7
          10.3      Testing, Monitoring, Administration and Maintenance.........................VII-7

11.  Digital Cross Connect System (DCS).........................................................VII-7
          11.1      Access......................................................................VII-7
          11.2      Optional Characteristics....................................................VII-7
          11.3      Alternate Provisioning......................................................VII-7
          11.4      Elements....................................................................VII-7
          11.5      Capabilities................................................................VII-8
          11.6      Protection and Performance..................................................VII-8
          11.7      Provisioning, Administration and Maintenance................................VII-8

12.  Operator Services (OS) and Directory Assistance (DA).......................................VII-8
             12.1      Customized Routing.......................................................VII-8

13.  Advanced Intelligent Network Access (AIN)..................................................VII-9

14.  Nondiscrimination Provision and Support....................................................VII-9

15.  Provisioning Intervals.....................................................................VII-9

16.  Directory Assistance Listing...............................................................VII-9

ARTICLE VIII
     ADDITIONAL SERVICES AND COORDINATED SERVICE ARRANGEMENTS...................................VIII-1

1.   Bona Fide Request Process..................................................................VIII-1
           1.1      Intent......................................................................VIII-1
           1.2      Process.....................................................................VIII-1

2.   Transfer of Service Announcements..........................................................VIII-1

3.   Misdirected Calls..........................................................................VIII-1
           3.1..................................................................................VIII-2
           3.2..................................................................................VIII-2

4.   911/E911 Arrangements......................................................................VIII-2
           4.1      Description of Service......................................................VIII-2
           4.2      Transport...................................................................VIII-2
           4.3      Cooperation and Level of Performance........................................VIII-2
           4.4      Basic 911 and E911 General Requirements.....................................VIII-2
           4.5      Compensation................................................................VIII-6

5.   Information Services Traffic...............................................................VIII-7
           5.1      Routing.....................................................................VIII-7
           5.2      Billing and Collection and Information Service Provider (ISP)
                    Remuneration................................................................VIII-7
           5.3      900-976 Call Blocking.......................................................VIII-7
</TABLE>



                                     -viii-

<PAGE>   10

<TABLE>
<S>   <C>     <C>       <C>                                                                     <C>
           5.4      Miscellaneous...............................................................VIII-7

6.   Telephone Relay Service....................................................................VIII-7

7.   Directory Assistance (DA) and Operator Services (OS).......................................VIII-7
           7.1      Directory Assistance Calls..................................................VIII-7
           7.2      Operator Services Calls.....................................................VIII-8

8.   Directory Assistance Listings Information..................................................VIII-8
           8.1..................................................................................VIII-8
           8.2..................................................................................VIII-8
           8.3..................................................................................VIII-8

9.   Directory Listings and Directory Distribution..............................................VIII-8

10.  Busy Line Verification and Busy Line Verification Interrupt................................VIII-9

11.  SAG........................................................................................VIII-9

12.  Dialing Format Changes.....................................................................VIII-9

13.  Operational Support Systems (OSS)..........................................................VIII-9

ARTICLE IX
     COLLOCATION................................................................................IX-1

1.   Physical Collocation.......................................................................IX-1
           1.1      Space Planning..............................................................IX-1
           1.2      Connection to Customer Loops and Ports......................................IX-1
           1.3      Connection to Other Collocated Carriers.....................................IX-1
           1.4      Choice of Vendor............................................................IX-2
           1.5      Monitoring..................................................................IX-2
           1.6      Phone Service...............................................................IX-2
           1.7      Intraoffice Diversity.......................................................IX-2
           1.8      DTI Proprietary Information.................................................IX-2
           1.9      Notification of Modifications...............................................IX-2
           1.10     Drawings....................................................................IX-2
           1.11     Construction of Space.......................................................IX-2
           1.12     Connection Equipment........................................................IX-3
           1.13     Access to DTI Collocation Space.............................................IX-3

2.   Virtual Collocation........................................................................IX-4
           2.1      Existing Virtual Collocation................................................IX-4
           2.2      Conversion from Physical to Virtual.........................................IX-4
           2.3      Vendors.....................................................................IX-4
           2.4      Inspection..................................................................IX-5

ARTICLE X
     ACCESS TO POLES, DUCTS, CONDUITS AND RIGHTS-OF-WAY.........................................X-1

APPENDIX A
     GTE PERFORMANCE MEASURES (PM)..............................................................A-1
</TABLE>



                                      -ix-

<PAGE>   11

<TABLE>
<S>   <C>                                                                                       <C>
APPENDIX B
     SERVICE MATRIX.............................................................................B-1

APPENDIX C
     INTERCONNECTION, TELECOMMUNICATIONS SERVICES AND
     FACILITIES AGREEMENT.......................................................................C-1

APPENDIX D
     RATES AND CHARGES FOR TRANSPORT AND TERMINATION
     OF TRAFFIC.................................................................................D-1

APPENDIX E
     RATES AND CHARGES FOR LOCAL NUMBER PORTABILITY USING RCF...................................E-1

APPENDIX F
     SERVICES AVAILABLE FOR RESALE..............................................................F-2

APPENDIX G
     PRICES FOR UNBUNDLED ELEMENTS..............................................................G-1

APPENDIX H
     RATES AND CHARGES FOR 911/E911 ARRANGEMENTS................................................H-1

APPENDIX I
     SERVICE ORDERING, PROVISIONING, BILLING AND MAINTENANCE....................................I-1

APPENDIX J
     SS7 SERVICES...............................................................................J-1

APPENDIX K
     POLE ATTACHMENT AGREEMENT..................................................................K-1

APPENDIX L
     CONDUIT OCCUPANCY AGREEMENT................................................................L-1

APPENDIX M
     RECIPROCAL COMPENSATION FOR CALL TERMINATION...............................................M-1

APPENDIX 46A
     GTE TERMS..................................................................................N-1

APPENDIX 46B
     OTHERCLEC TERMS............................................................................O-1
</TABLE>



                                      -x-




<PAGE>   12




This Interconnection, Resale and Unbundling Agreement (the "Agreement"), is
made effective as of                                     , 199      , by and
between GTE Midwest Incorporated/GTE Arkansas Incorporated, with its address
for purposes of this Agreement at 600 Hidden Ridge Drive, Irving, Texas 75038
("GTE"), and Digital Teleport, Inc., in its capacity as a certified provider of
local dial-tone service ("DTI"), with its address for this Agreement at 11111
Dorsett Road, St. Louis, Missouri 63043 (GTE and DTI being referred to
collectively as the "Parties" and individually as a "Party").  This Agreement
covers services in the State of Missouri only (the "State").

WHEREAS, interconnection between competing Local Exchange Carriers ("LECs") is
necessary and desirable for the mutual exchange and termination of traffic
originating on each LEC's network; and

WHEREAS, the Parties desire to exchange such traffic and related signalling in a
technically and economically efficient manner at defined and mutually agreed
upon interconnection points; and

WHEREAS, the Parties wish to enter into an agreement to interconnect their
respective telecommunications networks on terms that are fair and equitable to
both Parties; and

WHEREAS, Section 251 of the Telecommunications Act of 1996 (the "Act") imposes
specific obligations on LECs with respect to the interconnection of their
networks, resale of their telecommunications services, access to their poles,
ducts, conduits and rights-of-way and, in certain cases, the offering of
certain unbundled network elements and physical collocation of equipment in LEC
premises;

WHEREAS, GTE is entering, under protest, into certain aspects of this Agreement
that incorporate adverse results from the arbitrated agreements approved or
which may be approved by the Commission in this state and is doing so in order
to avoid the expense of arbitration while at the same time preserving its legal
positions, rights and remedies.

NOW, THEREFORE, in consideration of the mutual provisions contained herein and
other good and valuable consideration, the receipt and sufficiency of which are
hereby acknowledged, GTE and DTI hereby covenant and agree as follows:



<PAGE>   13




                               ARTICLE I

                     SCOPE AND INTENT OF AGREEMENT

Pursuant to this Agreement, the Parties will extend certain arrangements to one
another within each area in which they both operate within the State for
purposes of interconnection and the exchange of traffic between their
respective end user customers, and reciprocal access to poles, ducts, conduits
and rights-of-way.  This Agreement also governs the purchase by DTI of certain
telecommunications services provided by GTE in its franchise areas for resale
by DTI, the purchase by DTI of certain unbundled network elements from GTE, and
the terms and conditions of the collocation of certain equipment of DTI in the
premises of GTE.  This Agreement is an integrated package that reflects a
balancing of interests critical to the Parties.  This Agreement will be
submitted to the Missouri Public Service Commission (the "Commission") for
approval.  The Parties agree that their entrance into this Agreement is without
prejudice to and does not waive any positions they may have taken previously,
or may take in the future, in any legislative, regulatory, judicial or other
public forum addressing any matters, including matters related to the same
types of arrangements and/or matters related to GTE's cost recovery covered in
this Agreement.  DTI agrees to negotiate reciprocal terms and conditions with
GTE based on this Agreement.  GTE's execution of this Agreement is not a
concession or waiver in any manner concerning its position that certain of the
rates, terms and conditions contained herein are unlawful, illegal and
improper.

The services and facilities to be provided to DTI by GTE in satisfaction of
this Agreement may be provided pursuant to GTE tariffs and then current
practices.  Should such services and facilities be modified by tariff or by
Order, including any modifications resulting from other Commission proceedings,
federal court review or other judicial action, such modifications will be
deemed to automatically supersede any rates and terms and conditions of this
Agreement.  GTE will provide notification to  DTI before such a tariff becomes
effective, and DTI may provide input on such proposed tariff.  The Parties
shall cooperate with one another for the purpose of incorporating required
modifications into this agreement.



                                      I-1


<PAGE>   14




                               ARTICLE II

                              DEFINITIONS

1.   General Definitions.  Except as otherwise specified herein, the following
     definitions shall apply to all Articles and Appendices contained in this
     Agreement.  Additional definitions that are specific to the matters
     covered in a particular Article may appear in that Article.  To the extent
     that there may be any conflict between a definition set forth in this
     Article II and any definition in a specific Article or Appendix, the
     definition set forth in the specific Article or Appendix shall control
     with respect to that Article or Appendix.

      1.1  "ACCESS SERVICE REQUEST" (ASR) means an industry standard
           form used by the Parties to add, establish, change or disconnect
           services or trunks for the purposes of Interconnection.

      1.2  "ACT" means the Telecommunications Act of 1996, Public Law
           104-104 of the 104th United States Congress effective February 8,
           1996.

      1.3  "AFFILIATE" of a Party means a person, corporation or other
           legal entity that, directly or indirectly, owns or controls a Party,
           or is owned or controlled by, or is under common ownership or
           control with a Party.

      1.4  "AMA" means the Automated Message Accounting structure
           inherent in switch technology that initially records
           telecommunication message information.  AMA format is contained in
           the Automated Message Accounting document, published by Bellcore as
           GR-1100-CORE which defines the industry standard for message
           recording.

      1.5  "APPLICABLE LAW" shall mean all laws, statutes, common law,
           regulations, ordinances, codes, rules, guidelines, orders, permits,
           and approvals of any Governmental Authority, which apply or relate
           to the subject matter of this Agreement.

      1.6  "AUTOMATIC LOCATION IDENTIFICATION/DATA MANAGEMENT SYSTEM
           (ALI/DMS)" means the emergency services (E911/911) database
           containing customer location information (including name, address,
           telephone number, and sometimes special information from the local
           service provider) used to process subscriber access records into
           Automatic Location Identification (ALI) records.  From this
           database, records are forwarded to GTE's ALI Gateway for downloading
           by local ALI database systems to be available for retrieval in
           response to ANI from a 9-1-1 call.  Also, from this database, GTE
           will upload to its selective routers the selective router ALI
           (SR/ALI) which is used to determine to which Public Safety Answering
           Point ("PSAP") to route the call.

      1.7  "AUTOMATIC NUMBER IDENTIFICATION" OR "ANI" refers to the
           number transmitted through the network identifying the calling
           party.

      1.8  "BELLCORE" means an organization owned jointly by the Bell
           regional holding companies and that may in the future be owned
           partially or totally by other persons, that conducts research and
           development projects for its owners, including development of new
           telecommunications services.  Bellcore also provides certain
           centralized technical and management services for the regional
           holding companies and also provides generic requirements for the
           telecommunications industry for products, services and technologies.

      1.9  "BILL-AND-KEEP ARRANGEMENT" means a compensation arrangement
           whereby the Parties do not render bills to each other for the
           termination of local traffic specified in this



                                      II-1


<PAGE>   15




            Agreement and whereby the Parties terminate local exchange traffic
            originating from end-users served by the networks of the other
            Party  without explicit charging among or between said carriers for
            such traffic exchange.

      1.10 "BONA FIDE REQUEST (BFR)" process is intended to be used when
           requesting customized Service Orders for certain services, features,
           capabilities or functionality defined and agreed upon by the Parties
           as services to be ordered as Bona Fide Requests.

      1.11 "BUSINESS DAY" shall mean Monday through Friday, except for
           holidays on which the U.S. mail is not delivered.

      1.12 "CENTRAL OFFICE SWITCH" means a switch used to provide
           telecommunications services including (I) "End Office Switches"
           which are Class 5 switches from which end user Exchange Services are
           directly connected and offered, and (ii) "Tandem Office Switches"
           which are Class 4 switches which are used to connect and switch
           trunk circuits between and among central office switches.  Central
           office switches may be employed as combination end office/tandem
           office switches (combination Class 5/Class 4).

      1.13 "CENTRALIZED MESSAGE DISTRIBUTION SYSTEM" (CMDS) means the
           billing record and clearing house transport system that the Regional
           Bell Operating Companies ("RBOCs") and other incumbent LECs use to
           efficiently exchange out collects and in collects as well as Carrier
           Access Billing System ("CABS") records.

      1.14 "CLLI CODES" means Common Language Location Identifier Codes.

      1.15 "COMMERCIAL MOBILE RADIO SERVICES" (CMRS) means a radio
           communication service between mobile stations or receivers and land
           stations, or by mobile stations communicating among themselves that
           is provided for profit and that makes interconnected service
           available to the public or to such classes of eligible users as to
           be effectively available to a substantial portion of the public.

      1.16 "COMMISSION" means the Missouri Public Service Commission.

      1.17 "COMMON CHANNEL SIGNALING" OR "CCS" means a high-speed
           specialized packet-switched communications network that is separate
           (out-of-band) from the public packet-switched and message networks.
           CCS carries addressed signaling messages for individual trunk
           circuits and/or database-related services between Signaling Points
           in the CCS network using SS7 signaling protocol.

      1.18 "COMPETITIVE LOCAL EXCHANGE CARRIER" (CLEC) means any company
           or person authorized to provide local exchange services in
           competition with an ILEC.

      1.19 "COMPLIANCE" means environmental and safety laws and
           regulations are based upon a federal regulatory framework, with
           certain responsibilities delegated to the States.  An
           environmental/safety compliance program may include review of
           applicable laws/regulations, development of written procedures,
           training of employees and auditing.

      1.20 "CUSTOMER" may mean GTE or DTI depending on the context and
           which Party is receiving the service from the other Party.

      1.21 "CUSTOMER USAGE DATA" means that the local telecommunications
           services usage data of a CLEC customer, measured in minutes,
           sub-minute increments, message units, or otherwise, that is recorded
           and exchanged by the Parties.



                                      II-2


<PAGE>   16




      1.22 "DS-1" is a digital signal rate of 1.544 Mbps.

      1.23 "DS-3" is a digital signal rate of 44.736 Mbps.

      1.24 "ELECTRONIC FILE TRANSFER" refers to a system or process
           which utilizes an electronic format and protocol to send/receive
           data files.

      1.25 "EMR" means the Exchange Message Record which is an industry
           standard record used to exchange telecommunications message
           information among CLECs for billable, nonbillable, sample,
           settlement and study data.  EMR format is defined in BR-010-200-010
           CRIS Exchange Message Record, published by Bellcore and which
           defines the industry standard for exchange message records.

      1.26 "E-911 SERVICE" is a method of routing 911 calls to a Public
           Service Answering Point that uses a customer location database to
           determine the location to which a call should be routed.  E-9-1-1
           service includes the forwarding of the caller's Automatic Number
           Identification (ANI) to the PSAP where the ANI is used to retrieve
           and display the Automatic Location Identification (ALI) on a
           terminal screen at the answering Attendant's position.  It usually
           includes selective routing.

      1.27 "EXCHANGE SERVICE" refers to all basic access line services,
           or any other services offered to end users which provide end users
           with a telephonic connection to, and a unique telephone number
           address on, the public switched telecommunications network ("PSTN"),
           and which enable such end users to place or receive calls to all
           other stations on the PSTN.

      1.28 "EIS" OR "EXPANDED INTERCONNECTION SERVICE" means a service
           that provides interconnecting carriers with the capability to
           terminate basic fiber optic transmission facilities, including
           optical terminating equipment and multiplexers, at GTE's wire
           centers and access tandems and interconnect those facilities with
           the facilities of GTE.  Microwave is available on a case-by-case
           basis where feasible.

      1.29 "FACILITY" means all buildings, equipment, structures and
           other items located on a single site or contiguous or adjacent sites
           owned or operated by the same persons or person as used in Article
           III, Section 44.

      1.30 "FCC" means the Federal Communications Commission.

      1.31 "GENERATOR" means under Resource Conservation Recovery Act
           (RCRA), the person whose act produces a hazardous waste (40 CFR 261)
           or whose act first causes a hazardous waste to become subject to
           regulation.  The generator is legally responsible for the proper
           management and disposal of hazardous wastes in accordance with
           regulations.

      1.32 "GTOC" means GTE Telephone Operating Company.

      1.33 "GUIDE" means the GTE Open Market Transition Order/Processing
           Guide/ALEC Customer Guide, which contains GTE's operating procedures
           for ordering, provisioning, trouble reporting and repair for resold
           services and unbundled elements.  Except as specifically provided
           otherwise in this Agreement, service ordering, provisioning, billing
           and maintenance shall be governed by the "Guide" which may be
           amended from time to time by GTE as needed.



                                      II-3


<PAGE>   17




      1.34 "HAZARDOUS CHEMICAL" means as defined in the U.S.
           Occupational Safety and Health (OSHA) hazard communication standard
           (29 CFR 1910.1200), any chemical which is a health hazard or
           physical hazard.

      1.35 "HAZARDOUS WASTE" means as described in Resource Conservation
           Recovery Act (RCRA), a solid waste(s) which may cause, or
           significantly contribute to an increase in mortality or illness or
           pose a substantial hazard to human health or the environment when
           improperly treated, stored, transported or disposed of or otherwise
           managed because of its quantity, concentration or physical or
           chemical characteristics.

      1.36 "IMMINENT DANGER" means as described in the Occupational
           Safety and Health Act and expanded for environmental matters, any
           conditions or practices at a facility which are such that a danger
           exists which could reasonably be expected to cause death or serious
           harm or significant damage to the environment or natural resources.

      1.37 "INCUMBENT LOCAL EXCHANGE CARRIER" (ILEC) means any local
           exchange carrier that was as of February 8,1996, deemed to be a
           member of the Exchange Carrier Association as set forth in 47 C.F.R.
           Section 69.601(b) of the FCC's regulations.

      1.38 "INTERIM NUMBER PORTABILITY (INP)" means the delivery of LNP
           capabilities, from a customer standpoint in terms of call
           completion, with as little impairment of functioning, quality,
           reliability, and convenience as possible and from a carrier
           standpoint in terms of compensation, through the use of existing and
           available call routing, forwarding, and addressing capabilities.

      1.39 "INTERCONNECTION POINT" ("IP") means the physical point on
           the network where the two parties interconnect.  The "IP" is the
           demarcation point between ownership of the transmission facility.

      1.40 "ISDN USER PART (ISUP)" means a part of the SS7 protocol that
           defines call setup messages and call takedown messages.

      1.41 "IXC" OR "INTEREXCHANGE CARRIER" means a telecommunications
           service provider authorized by the FCC to provide interstate long
           distance communications services between LATAs and are authorized by
           the State to provide inter- and/or intraLATA long distance
           communications services within the State.

      1.42 "INTERNETWORK FACILITIES" OR "INTERCONNECTION FACILITY" means
           the physical connection of separate pieces of equipment,
           transmission facilities, etc., within, between and among networks,
           for the transmission and routing of exchange service and exchange
           access.

      1.43 "LATA" means Local Access and Transport Area.  A LATA denotes
           a geographic area for the provision and administration of
           communications service; i.e., intraLATA or interLATA.

      1.44 "LINE INFORMATION DATA BASE (LIDB)" means one or all, as the
           context may require, of the Line Information databases owned
           individually by GTE and other entities which provide, among other
           things, calling card validation functionality for telephone line
           number cards issued by GTE and other entities.  A LIDB also contains
           validation data for collect and third number-billed calls; i.e.,
           Billed Number Screening.

      1.45 "LINE SIDE" refers to an end office switch connection that
           has been programmed to treat the circuit as a local line connected
           to an ordinary telephone station set.  Line side



                                      II-4


<PAGE>   18




            connections offer only those transmission and signaling features
            appropriate for a connection between an end office and an ordinary
            telephone set.

      1.46 "LOCAL EXCHANGE CARRIER" OR "LEC" means any company certified
           by the Commission to provide local exchange telecommunications
           service.  This includes the Parties to this Agreement.

      1.47 "LOCAL EXCHANGE ROUTING GUIDE" OR "LERG" means the Bellcore
           reference customarily used to identify NPA-NXX routing and homing
           information, as well as network element and equipment designation.

      1.48 "LOCAL NUMBER PORTABILITY (LNP)" means the ability of users
           of telecommunications services to retain, at the same location,
           existing telecommunications numbers without impairment of quality,
           reliability, or convenience when switching from one
           telecommunications carrier to another.

      1.49 "LOCAL TRAFFIC" means traffic that is originated by an end
           user of one Party and terminates to the end user of the other Party
           within GTE's then current local serving area, including mandatory
           local calling scope arrangements.  A mandatory local calling scope
           arrangement is an arrangement that provides end users a local
           calling scope, Extended Area Service ("EAS"), beyond their basic
           exchange serving area.  Local Traffic does not include optional
           local calling scopes (i.e., optional rate packages that permit the
           end user to choose a local calling scope beyond their basic exchange
           serving area for an additional fee), referred to hereafter as
           "optional EAS." Local Traffic excludes Information Service Provider
           ("ISP") traffic (e.g., Internet, paging, 900-976, etc.).

      1.50 "MDF" OR "MAIN DISTRIBUTION FRAME" means the distribution
           frame used to interconnect cable pairs and line trunk equipment
           terminating on a switching system.

      1.51 "MEET-POINT BILLING" OR "MPB" refers to an arrangement
           whereby two LECs jointly provide the transport element of a switched
           access service to one of the LEC's end office switches, with each
           LEC receiving an appropriate share of the transport element revenues
           as defined by their effective access tariffs.

      1.52 "MECAB" refers to the Multiple Exchange Carrier Access
           Billing ("MECAB") document prepared by the Billing Committee of the
           Ordering and Billing Forum ("OBF"), which functions under the
           auspices of the Carrier Liaison Committee ("CLC") of the Alliance
           for Telecommunications Industry Solutions ("ATIS").  The MECAB
           document, published by Bellcore as Special Report SR-BDS-000983,
           contains the recommended guidelines for the billing of an access
           service provided by two or more LECs, or by one LEC in two or more
           states within a single LATA.

      1.53 "MECOD" refers to the Multiple Exchange Carriers Ordering and
           Design ("MECOD") Guidelines for Access Services - Industry Support
           Interface, a document developed by the Ordering/Provisioning
           Committee under the auspices of the Ordering and Billing Forum
           ("OBF"), which functions under the auspices of the Carrier Liaison
           Committee ("CLC") of the Alliance for Telecommunications Industry
           Solutions ("ATIS").  The MECOD document, published by Bellcore as
           Special Report SR-STS-002643, establish methods for processing
           orders for access service which is to be provided by two or more
           LECs.

      1.54 "MID-SPAN FIBER MEET" means an Interconnection architecture
           whereby two carriers' fiber transmission facilities meet at a
           mutually agreed-upon POI.



                                      II-5


<PAGE>   19




      1.55 "NANP" means the "North American Numbering Plan", the system
           of telephone numbering employed in the United States, Canada, and
           the Caribbean countries that employ NPA 809.

      1.56 "NETWORK ELEMENT" means a facility or equipment used in the
           provision of a telecommunications service.  Network Element includes
           features, functions, and capabilities that are provided  by means of
           such facility or equipment, including subscriber numbers, databases,
           signaling systems, and information sufficient for billing and
           collection or used in the transmission, routing, or other provision
           of a telecommunications service.

      1.57 "NID" OR "NETWORK INTERFACE DEVICE" means the point of
           demarcation between the end user's inside wiring and GTE's
           facilities.

      1.58 "NUMBERING PLAN AREA" OR "NPA" is also sometimes referred to
           as an area code.  This is the three digit indicator which is defined
           by the "A", "B", and "C" digits of each 10-digit telephone number
           within the NANP.  Each NPA contains 800 possible NXX Codes.  There
           are two general categories of NPA, "Geographic NPAs" and
           "Non-Geographic NPAs".  A Geographic NPA is associated with a
           defined geographic area, and all telephone numbers bearing such NPA
           are associated with services provided within that geographic area.
           A Non-Geographic NPA, also known as a "Service Access Code" or "SAC
           Code" is typically associated with a specialized telecommunications
           service which may be provided across multiple geographic NPA areas.
           800, 900, 700, and 888 are examples of Non-Geographic NPAs.

      1.59 "NXX", "NXX CODE", "CENTRAL OFFICE CODE" OR "CO CODE" is the
           three digit switch entity indicator which is defined by the "D",
           "E", and "F" digits of a 10-digit telephone number within the NANP.
           Each NXX Code contains 10,000 station numbers.

      1.60 "911 SERVICE" means a universal telephone number which gives
           the public direct access to the PSAP.  Basic 911 service collects
           911 calls from one or more local exchange switches that serve a
           geographic area.  The calls are then sent to the correct authority
           designated to receive such calls.

      1.61 "OWNER AND OPERATOR" means as used in OSHA regulations, owner
           is the legal entity, including a lessee, which exercises control
           over management and record keeping functions relating to a building
           or facility.  As used in the Resource Conservation and Recovery Act
           (RCRA), operator means the person responsible for the overall (or
           part of the) operations of a facility.

      1.62 "POI" means Point of Interconnection designated for routing
           of local interconnection trunks.

      1.63 "POLE ATTACHMENT" has the meaning as set forth in Article X
           and Appendix K of this Agreement.

      1.64 "PROVIDER" may mean GTE or DTI depending on the context and
           which Party is providing the service to the other Party.

      1.65 "PUBLIC SAFETY ANSWERING POINT" OR "PSAP" means an answering
           location for 9-1-1 calls originating in a given area.  A PSAP may be
           designated as Primary or Secondary, which refers to the order in
           which calls are directed for answering.  Primary PSAPs respond
           first; Secondary PSAPs receive calls on a transfer basis only, and
           generally serve as a centralized answering location for a particular
           type of emergency call.  PSAPs are staffed



                                      II-6


<PAGE>   20




            by employees of Emergency Response Agencies ("ERAs") such as
            police, fire or emergency medical agencies or by employees of a
            common bureau serving a group of such entities.

      1.66 "RATE CENTER" means the specific geographic point and
           corresponding geographic area that are associated with one or more
           particular NPA-NXX Codes that have been assigned to a LEC for its
           provision of Exchange Services.  The geographic point is identified
           by a specific Vertical and Horizontal (V&H) coordinate that is used
           to calculate distance-sensitive end user traffic to/from the
           particular NPA-NXXs associated with the specific Rate Center.

      1.67 "RIGHT-OF-WAY" OR "ROW" means the right to use the land or
           other property of another party to place poles, conduits, cables,
           other structures and equipment, or to provide passage to access such
           structures and equipment.  A ROW may run under, on, or above public
           or private property (including air space above public or private
           property) and may include the right to use discrete space in
           buildings, building complexes, or other locations.

      1.68 "ROUTING POINT" denotes a location that a LEC has designated
           on its network as the homing (routing) point for traffic that
           terminates to Exchange Services provided by the LEC that bear a
           certain NPA-NXX designation.  The Routing Point is used to calculate
           airline mileage for the distance-sensitive transport element charges
           of Switched Access Services.  Pursuant to Bellcore Practice
           BR795-100-100, the Routing Point may be an end office location, or a
           "LEC Consortium Point of Interconnection."  The Routing Point must
           be in the same LATA as the associated NPA-NXX.

      1.69 "SERVICE CONTROL POINT" OR "SCP" is the node in the signaling
           network to which informational requests for service handling, such
           as routing, are directed and processed.  The SCP is a real time
           database system that, based on a query from the SSP, performs
           subscriber or application-specific service logic, and then sends
           instructions back to the SSP on how to continue call processing.

      1.70 "SERVICE SWITCHING POINT" OR "SSP" means a Signaling Point
           that can launch queries to databases and receive/interpret responses
           used to provide specific customer services.

      1.71 "SIGNALING POINT" OR "SP" means a node in the CCS network
           that originates and/or receives signaling messages, or transfers
           signaling messages from one signaling link to another, or both.

      1.72 "SIGNALING SYSTEM 7" OR "SS7" means the signaling protocol,
           Version 7, of the CCS network, based upon American National
           Standards Institute ("ANSI") standards.

      1.73 "SIGNAL TRANSFER POINT" OR "STP" means a packet switch in the
           CCS network that is used to  route signaling messages among SSPs,
           SCPs and other STPs in order to set up calls and to query databases
           for advanced services.  GTE's network includes mated pairs of local
           and regional STPs.  STPs are provided in pairs for redundancy.  GTE
           STPs conform to ANSI T1.111-8 standards.

      1.74 "SUBSIDIARY" of a Party means a corporation or other legal
           entity that is majority owned by such Party.

      1.75 "SYNCHRONOUS OPTICAL NETWORK" OR "SONET" means synchronous
           electrical ("STS") or optical channel ("OC") connections between
           LECs.



                                      II-7


<PAGE>   21




      1.76 "SWITCHED ACCESS SERVICE" means the offering of facilities
           for the purpose of the origination or termination of traffic to or
           from Exchange Service customers in a given area pursuant to a
           switched access tariff.  Switched Access Services include:  Feature
           Group A, Feature Group B, Feature Group C, Feature Group D, 800
           access and 900 access services.

      1.77 "TELECOMMUNICATIONS SERVICES" means the offering of
           telecommunications for a fee directly to the public, or to such
           classes of users as to be effectively available directly to the
           public, regardless of the facilities used.

      1.78 "THIRD PARTY CONTAMINATION" means environmental pollution
           that is not generated by the LEC or DTI but results from off-site
           activities impacting a facility.

      1.79 "TRUNK SIDE" refers to a central office switch connection
           that is capable of, and has been programmed to treat the circuit as,
           connecting to another switching entity, for example, to another
           central office switch.  Trunk side connections offer those
           transmission and signaling features appropriate for the connection
           of switching entities and cannot be used for the direct connection
           of ordinary telephone station sets.

      1.80 "UNDEFINED TERMS" means the Parties acknowledge that terms
           may appear in this Agreement which are not defined and agree that
           any such terms shall be construed in accordance with their customary
           usage in the telecommunications industry as of the effective date of
           this Agreement.

      1.81 "VERTICAL FEATURES" (INCLUDING "CLASS FEATURES") means
           vertical services and switch functionalities provided by GTE,
           including:  Automatic Call Back; Automatic Recall; Call Forwarding
           Busy Line/Don't Answer; Call Forwarding Don't Answer; Call
           Forwarding Variable; Call Forwarding - Busy Line; Call Trace; Call
           Waiting; Call Number Delivery Blocking Per Call; Calling Number
           Blocking Per Line; Cancel Call Waiting; Distinctive Ringing/Call
           Waiting; Incoming Call Line Identification Delivery; Selective Call
           Forward; Selective Call Rejection; Speed Calling; and Three Way
           Calling/Call Transfer.

      1.82 "WIRE CENTER" means a building or space within a building
           that serves as an aggregation point on a LEC's network, where
           transmission facilities and circuits are connected or switched.
           "Wire center" can also denote a building in which one or more
           Central Offices, used for the provision of exchange services and
           access services, are located.



                                      II-8


<PAGE>   22
                              ARTICLE III

                           GENERAL PROVISIONS

1.   Scope of General Provisions.  Except as may otherwise be set forth in a
     particular Article or Appendix of this Agreement, in which case the
     provisions of such Article or Appendix shall control, these General
     Provisions apply to all Articles and Appendices of this Agreement.

2.   Term and Termination.

     2.1  Term.  Subject to the termination provisions contained in this
          Agreement, the term of this Agreement shall be two (2) years from the
          effective date referenced in the first paragraph of this Agreement and
          shall continue in effect for consecutive one (1) year terms until
          either Party gives the other Party at least ninety (90) calendar days
          written notice of termination, which termination shall be effective at
          the end of the then-current term.  In the event notice is given less
          than 90 calendar days prior to the end of the current term, this
          Agreement shall remain in effect for 90 calendar days after such
          notice is received, provided, that in no case shall the term be
          extended beyond 90 calendar days after the end of the current term.

     2.2  Post-Termination Arrangements.  Except in the case of termination as a
          result of either Party's default or a termination upon sale, for
          service arrangements made available under this Agreement and existing
          at the time of termination, those arrangements may continue without
          interruption (a) under a new agreement voluntarily executed by the
          Parties; (b) standard terms and conditions approved and made generally
          effective by the Commission, if any; (c) tariff terms and conditions
          made generally available to all CLECs; or (d) any rights under Section
          252(I) of the Act.

     2.3  Termination Upon Default.  Either Party may terminate this Agreement
          in whole or in part in the event of a default by the other Party;
          provided however, that the non-defaulting Party notifies the
          defaulting party in writing of the alleged default and that the
          defaulting Party does not cure the alleged default within sixty (60)
          calendar days of receipt of written notice thereof.  Default is
          defined to include:

     (a)  A Party's insolvency or the initiation of bankruptcy or receivership
          proceedings by or against the Party; or

     (b)  A Party's refusal or failure in any material respect properly to
          perform its obligations under this Agreement, or the violation any of
          the material terms or conditions of this Agreement.

     2.4  Termination Upon Sale.  Notwithstanding anything to the contrary
          contained herein, a Party may terminate this Agreement as to a
          specific operating area or portion thereof of such Party if such Party
          sells or otherwise transfers the area or portion thereof. The Party
          shall provide the other Party with at least ninety (90) calendar days'
          prior written notice of such termination, which shall be effective on
          the date specified in the notice.  Notwithstanding termination of this
          Agreement as to a specific operating area, this Agreement shall remain
          in full force and effect in the remaining operating areas.

     2.5  Liability upon Termination. Termination of this Agreement, or any part
          hereof, for any cause shall not release either Party from any
          liability which at the time of termination had already accrued to the
          other Party or which thereafter accrues in any respect to any act or
          omission occurring prior to the termination or from an obligation
          which is expressly stated in this Agreement to survive termination.



                                     III-1


<PAGE>   23




3.   Amendments.  Any amendment, modification, or supplement to this Agreement
     must be in writing and signed by an authorized representative of each
     Party.  The term "this Agreement" shall include future amendments,
     modifications, and supplements.

4.   Assignment.  Any assignment by either Party of any right, obligation, or
     duty, in whole or in part, or of any interest, without the written consent
     of the other Party shall be void, except that either Party may assign all
     of its rights, and delegate its obligations, liabilities and duties under
     this Agreement, either in whole or in part, to any entity that is, or that
     was immediately preceding such assignment, a Subsidiary or Affiliate of
     that Party without consent, but with written notification.  The
     effectiveness of an assignment shall be conditioned upon the assignee's
     written assumption of the rights, obligations, and duties of the assigning
     Party.

5.   Authority.  Each person whose signature appears on this Agreement
     represents and warrants that he or she has authority to bind the Party on
     whose behalf he or she has executed this Agreement.

6.   Responsibility for Payment.  All charges for Services provided under this
     Agreement will be billed to DTI, including all applicable taxes and
     surcharges.  In addition, the End User Common Line (EUCL) Charge from GTOC
     Tariff FCC No. 1 is applicable to Resold Services.  DTI is responsible for
     payment of charges billed regardless of any billing arrangements or
     situation between DTI and its end user customer.

7.   Billing and Payment.  Except as provided elsewhere in this Agreement and
     where applicable, in conformance with MECAB and MECOD guidelines, DTI and
     GTE agree to exchange all information to accurately, reliably, and
     properly bill for features, functions and services rendered under this
     Agreement.

     7.1  Dispute.  If one Party disputes a billing statement issued by the
          other Party, the billed Party shall notify Provider in writing
          regarding the nature and the basis of the dispute within six (6)
          months of the statement date or the dispute shall be waived.  The
          Parties shall diligently work toward resolution of all billing issues.

     7.2  Late Payment Charge.  If any undisputed amount due on the billing
          statement is not received by Provider on the payment due date,
          Provider may charge, and Customer agrees to pay, at Provider's option,
          interest on the past due balance at a rate equal to the lesser of the
          interest rates set forth in the applicable GTE/Contel state access
          tariffs or the GTOC/GSTC FCC No. 1 tariff, one and one-half percent (1
          1/2%) per month or the maximum nonusurious rate of interest under
          applicable law.  Late payment charges shall be included on the next
          statement.

     7.3  Due Date.  Payment is due 30 calendar days from the bill date.

     7.4  Audits.  Either Party may conduct an audit of the other Party's books
          and records pertaining to the Services provided under this Agreement,
          no more frequently than once per twelve (12) month period, to evaluate
          the other Party's accuracy of billing, data and invoicing in
          accordance with this Agreement.  Any audit shall be performed as
          follows:  (I) following at least thirty (30) Business Days' prior
          written notice to the audited Party; (ii) subject to the reasonable
          scheduling requirements and limitations of the audited Party; (iii) at
          the auditing Party's sole cost and expense; (iv) of a reasonable scope
          and duration; (v) in a manner so as not to interfere with the audited
          Party's business operations; and (vi) in compliance with the audited
          Party's security rules.



                                     III-2


<PAGE>   24




8.   Binding Effect.  This Agreement shall be binding on and inure to the
     benefit of the respective successors and permitted assigns of the Parties.

9.   Capacity Planning and Forecasting.  Within thirty (30) days from the
     Effective Date of this Agreement, the Parties agree to have met and
     developed joint planning and forecasting responsibilities which are
     applicable to Local Services, including Features, Network Elements, INP,
     Interconnection Services, Collocation, Poles, Conduits and Rights of Way
     (ROW).  Such responsibilities shall include but are not limited to the
     following:

     (a) The Parties will establish periodic reviews of network and technology
     plans and will notify one another no later than six (6) months in advance
     of changes that would impact either Party's provision of services.

     (b) DTI will furnish to GTE information that provides for state-wide annual
     forecasts of order activity, in-service quantity forecasts, and
     facility/demand forecasts.

     (c) The Parties will develop joint forecasting responsibilities for traffic
     utilization over trunk groups and yearly forecasted trunk quantities.

     (d) DTI shall notify GTE promptly of changes to current forecasts (increase
     or decrease) that generate a shift in the demand curve for the following
     forecasting period.

10.  Compliance with Laws and Regulations.  Each Party shall comply with all
     federal, state, and local statutes, regulations, rules, ordinances,
     judicial decisions, and administrative rulings applicable to its
     performance under this Agreement.

11.  Confidential Information.

     11.1 Identification.  Either Party may disclose to the other proprietary or
          confidential customer, technical, or business information in written,
          graphic, oral or other tangible or intangible forms ("Confidential
          Information").  In order for information to be considered Confidential
          Information under this Agreement, it must be marked "Confidential" or
          "Proprietary," or bear a marking of similar import.  Orally or
          visually disclosed information shall be deemed Confidential
          Information only if contemporaneously identified as such and reduced
          to writing and delivered to the other Party with a statement or
          marking of confidentially within thirty (30) calendar days after oral
          or visual disclosure.

     Notwithstanding the foregoing, preorders and all orders for Services or
     network elements placed by DTI pursuant to this Agreement, and information
     that would constitute customer proprietary network information of DTI end
     user customers pursuant to the Act and the rules and regulations of the
     FCC, as well as recorded usage information with respect to DTI end users,
     whether disclosed by DTI to GTE or otherwise acquired by GTE in the course
     of its performance under this Agreement, and where GTE is the NANP Number
     Plan Administrator, DTI information submitted to GTE in connection with
     such responsibilities shall be deemed Confidential Information of DTI for
     all purposes under this Agreement whether or not specifically marked or
     designated as confidential or proprietary.

     11.2 Handling.  In order to protect such Confidential Information from
          improper disclosure, each Party agrees:

     (a)  That all Confidential Information shall be and shall remain the
          exclusive property of the source;



                                     III-3


<PAGE>   25




     (b)  To limit access to such Confidential Information to authorized
          employees who have a need to know the Confidential Information for
          performance of this Agreement;

     (c)  To keep such Confidential Information confidential and to use the same
          level of care to prevent disclosure or unauthorized use of the
          received Confidential Information as it exercises in protecting its
          own Confidential Information of a similar nature;

     (d)  Not to copy, publish, or disclose such Confidential Information to
          others or authorize anyone else to copy, publish, or disclose such
          Confidential Information to others without the prior written approval
          of the source;

     (e)  To return promptly any copies of such Confidential Information to the
          source at its request; and

     (f)  To use such Confidential Information only for purposes of fulfilling
          work or services performed hereunder and for other purposes only upon
          such terms as may be agreed upon between the Parties in writing.

     11.3 Exceptions.  These obligations shall not apply to any Confidential
          Information that was legally in the recipient's possession prior to
          receipt from the source, was received in good faith from a Third Party
          not subject to a confidential obligation to the source, now is or
          later becomes publicly known through no breach of confidential
          obligation by the recipient, was developed by the recipient without
          the developing persons having access to any of the Confidential
          Information received in confidence from the source, or that is
          required to be disclosed pursuant to subpoena or other process issued
          by a court or administrative agency having appropriate jurisdiction,
          provided, however, that the recipient shall give prior notice to the
          source and shall reasonably cooperate if the source deems it necessary
          to seek protective arrangements.

     11.4 Survival.  The obligation of confidentiality and use with respect to
          Confidential Information disclosed by one Party to the other shall
          survive any termination of this Agreement for a period of three (3)
          years from the date of the initial disclosure of the Confidential
          Information.

12.  Consent.  Where consent, approval, or mutual agreement is required of a
     Party, it shall not be unreasonably withheld or delayed.

13.  Cooperation on Fraud Minimization.  DTI assumes responsibility for all
     fraud associated with its end user customers and accounts.  GTE shall have
     no responsibility for, nor is it required to investigate or make
     adjustments to DTI's account in cases of fraud.  The Parties agree that
     they shall cooperate with one another to resolve cases of fraud.  The
     Parties' fraud minimization procedures are to be cost effective and
     implemented so as not to unduly burden or harm one Party as compared to
     the other.

14.  Dispute Resolution.

     14.1 Alternative to Litigation.  Except as provided under Section 252 of
          the Act with respect to the approval of this Agreement by the
          Commission, the Parties desire to resolve disputes arising out of or
          relating to this Agreement without litigation.  Accordingly, except
          for action seeking a temporary restraining order or an injunction
          related to the purposes of this Agreement, or suit to compel
          compliance with this dispute resolution process, the Parties agree to
          use the following alternative dispute resolution procedures as their
          sole remedy



                                     III-4


<PAGE>   26




          with respect to any controversy or claim arising out of or relating to
          this Agreement or its breach.

     14.2 Negotiations.  At the written request of a Party, each Party will
          appoint a knowledgeable, responsible representative to meet and
          negotiate in good faith to resolve any dispute arising out of or
          relating to this Agreement.  The Parties intend that these
          negotiations be conducted by non-lawyer, business representatives. The
          location, format, frequency, duration, and conclusion of these
          discussions shall be left to the discretion of the representatives.
          Upon agreement, the representatives may utilize other alternative
          dispute resolution procedures such as mediation to assist in the
          negotiations.  Discussions and correspondence among the
          representatives for purposes of these negotiations shall be treated as
          confidential information developed for purposes of settlement, exempt
          from discovery, and shall not be admissible in the arbitration
          described below or in any lawsuit without the concurrence of all
          Parties.  Documents identified in or provided with such
          communications, which are not prepared for purposes of the
          negotiations, are not so exempted and may, if otherwise discoverable,
          be discovered or otherwise admissible, be admitted in evidence, in the
          arbitration or lawsuit.

     14.3 Arbitration.  If the negotiations do not resolve the dispute within
          sixty (60) Business Days of the initial written request, the dispute
          shall be submitted to binding arbitration by a single arbitrator
          pursuant to the Commercial Arbitration Rules of the American
          Arbitration Association except that the Parties may select an
          arbitrator outside American Arbitration Association rules upon mutual
          agreement.  A Party may demand such arbitration in accordance with the
          procedures set out in those rules.  Discovery shall be controlled by
          the arbitrator and shall be permitted to the extent set out in this
          section.  Each Party may submit in writing to a Party, and that Party
          shall so respond to, a maximum of any combination of thirty-five (35)
          (none of which may have subparts) of the following:  interrogatories,
          demands to produce documents, or requests for admission.  Each Party
          is also entitled to take the oral deposition of one individual of
          another Party.  Additional discovery may be permitted upon mutual
          agreement of the Parties. The arbitration hearing shall be commenced
          within sixty (60) Business Days of the demand for arbitration.  The
          arbitration shall be held in a mutually agreeable city.  The
          arbitrator shall control the scheduling so as to process the matter
          expeditiously.  The Parties may submit written briefs.  The arbitrator
          shall rule on the dispute by issuing a written opinion within thirty
          (30) Business Days after the close of hearings.  The times specified
          in this section may be extended upon mutual agreement of the Parties
          or by the arbitrator upon a showing of good cause.  Judgment upon the
          award rendered by the arbitrator may be entered in any court having
          jurisdiction.

     14.4 Expedited Arbitration Procedures.  If the issue to be resolved through
          the negotiations referenced in Section 14.2 directly and materially
          affects service to either Party's end user customers, then the period
          of resolution of the dispute through negotiations before the dispute
          is to be submitted to binding arbitration shall be five (5) Business
          Days.  Once such a service affecting dispute is submitted to
          arbitration, the arbitration shall be conducted pursuant to the
          expedited procedures rules of the Commercial Arbitration Rules of the
          American Arbitration Association (i.e., rules 53 through 57).

     14.5 Costs.  Each Party shall bear its own costs of these procedures.  A
          Party seeking discovery shall reimburse the responding Party the costs
          of production of documents (including search time and reproduction
          costs).  The Parties shall equally split the fees of the arbitration
          and the arbitrator.



                                     III-5




<PAGE>   27




     14.6 Continuous Service.  The Parties shall continue providing services to
          each other during the pendency of any dispute resolution procedure,
          and the Parties shall continue to perform their obligations (including
          making payments in accordance with Article IV, Section 4) in
          accordance with this Agreement.

15.  Entire Agreement.  This Agreement constitutes the entire agreement of the
     Parties pertaining to the subject matter of this Agreement and supersedes
     all prior agreements, negotiations, proposals, and representations,
     whether written or oral, and all contemporaneous oral agreements,
     negotiations, proposals, and representations concerning such subject
     matter.  No representations, understandings, agreements, or warranties,
     expressed or implied, have been made or relied upon in the making of this
     Agreement other than those specifically set forth herein.

16.  Expenses.  Except as specifically set out in this Agreement, each Party
     shall be solely responsible for its own expenses involved in all
     activities related to the subject of this Agreement.

17.  Force Majeure.  In the event performance of this Agreement, or any
     obligation hereunder, is either directly or indirectly prevented,
     restricted, or interfered with by reason of fire, flood, earthquake or
     likes acts of God, wars, revolution, civil commotion, explosion, acts of
     public enemy, embargo, acts of the government in its sovereign capacity,
     labor difficulties, including without limitation, strikes, slowdowns,
     picketing, or boycotts, unavailability of equipment from vendor, changes
     requested by Customer, or any other circumstances beyond the reasonable
     control and without the fault or negligence of the Party affected, the
     Party affected, upon giving prompt notice to the other Party, shall be
     excused from such performance on a day-to-day basis to the extent of such
     prevention, restriction, or interference (and the other Party shall
     likewise be excused from performance of its obligations on a day-to-day
     basis until the delay, restriction or interference has ceased); provided
     however, that the Party so affected shall use diligent efforts to avoid or
     remove such causes of nonperformance and both Parties shall proceed
     whenever such causes are removed or cease.

18.  Good Faith Performance.  In the performance of their obligations under
     this Agreement, the Parties shall act in good faith.  In situations in
     which notice, consent, approval or similar action by a Party is permitted
     or required by any provision of this Agreement, such action shall not be
     unreasonably delayed, withheld or conditioned.

19.  Governing Law.  This Agreement shall be governed by and construed in
     accordance with the domestic laws of the state where the Services are
     provided or the facilities reside and shall be subject to the exclusive
     jurisdiction of the courts therein.

20.  Standard Practices.  The Parties acknowledge that GTE shall be adopting
     some industry standard approaches and/or establishing its own standard
     approaches to various requirements hereunder applicable to DTI industry
     which may be added in the Guide.  DTI agrees that GTE may implement such
     approaches to satisfy any GTE obligations under this Agreement.  A copy is
     attached hereto as Appendix A and is incorporated by reference into this
     Agreement.

21.  Headings.  The headings in this Agreement are inserted for convenience
     and identification only and shall not be considered in the interpretation
     of this Agreement.

22.  Independent Contractor Relationship.  The persons provided by each Party
     shall be solely that Party's employees and shall be under the sole and
     exclusive direction and control of that Party.  They shall not be
     considered employees of the other Party for any purpose.  Each Party shall
     remain an independent contractor with respect to the other and shall be
     responsible for compliance with all laws, rules and regulations involving,
     but not limited to, employment of labor,



                                     III-6


<PAGE>   28




     hours of labor, health and safety, working conditions and payment of wages.
     Each Party shall also be responsible for payment of taxes, including
     federal, state and municipal taxes, chargeable or assessed with respect to
     its employees, such as Social Security, unemployment, workers'
     compensation, disability insurance, and federal and state withholding. Each
     Party shall indemnify the other for any loss, damage, liability, claim,
     demand, or penalty that may be sustained by reason of its failure to comply
     with this provision.

23.  Law Enforcement Interface.

     23.1 Except to the extent not available in connection with GTE's operation
          of its own business, GTE shall provide seven day a week/twenty-four
          hour a day assistance to law enforcement persons for emergency traps,
          assistance involving emergency traces and emergency information
          retrieval on customer invoked CLASS services, including, without
          limitation, call traces requested by DTI.

     23.2 GTE agrees to work jointly with DTI in security matters to support law
          enforcement agency requirements for taps, traces, court orders, etc.
          Charges for providing such services for DTI Customers will be billed
          to DTI.

     23.3 GTE will, in non emergency situations, inform the requesting law
          enforcement agencies that the end-user to be wire tapped, traced, etc.
          is a DTI Customer and shall refer them to DTI.

24.  Liability and Indemnity.

     24.1 Indemnification.  Subject to the limitations set forth in Section 24.4
          of this Article III, each Party agrees to release, indemnify, defend,
          and hold harmless the other Party from all losses, claims, demands,
          damages, expenses, suits, or other actions, or any liability
          whatsoever, including, but not limited to, costs and attorney's fees,
          whether suffered, made, instituted, or asserted by any other party or
          person, for invasion of privacy, personal injury to or death of any
          person or persons, or for losses, damages, or destruction of property,
          whether or not owned by others, proximately caused by the indemnifying
          Party's negligence or willful misconduct, regardless of form of
          action.  The indemnified Party agrees to notify the other Party
          promptly, in writing, of any written claims, lawsuits, or demands for
          which it is claimed that the indemnifying Party is responsible under
          this Section and to cooperate in every reasonable way to facilitate
          defense or settlement of claims.  The indemnifying Party shall have
          complete control over defense of the case and over the terms of any
          proposed settlement or compromise thereof.  The indemnifying Party
          shall not be liable under this Section for settlement by the
          indemnified Party or any claim, lawsuit, or demand, if the
          indemnifying Party has not approved the settlement in advance, unless
          the indemnifying Party has had the defense of the claim, lawsuit, or
          demand tendered to it in writing and has failed to assume such
          defense.  In the event of such failure to assume defense, the
          indemnifying Party shall be liable for any reasonable settlement made
          by the indemnified Party without approval of the indemnifying Party.

     24.2 End User and Content-Related Claims.  Each Party agrees to release,
          indemnify, defend, and hold harmless the other Party, its affiliates,
          and any third-party provider or operator of facilities involved in the
          provision of Services, Unbundled Network Elements or Facilities under
          this Agreement (collectively, the "Indemnified Party") from all
          losses, claims, demands, damages, expenses, suits, or other actions,
          or any liability whatsoever, including, but not limited to, costs and
          attorney's fees, suffered, made, instituted, or asserted by either
          Party's end users against an Indemnified Party arising from Services,
          Unbundled Network Elements or Facilities. Each Party further agrees to
          release, indemnify, defend, and hold



                                     III-7


<PAGE>   29




          harmless the Indemnified Party from all losses, claims, demands,
          damages, expenses, suits, or other actions, or any liability
          whatsoever, including, but not limited to, costs and attorney's fees,
          suffered, made, instituted, or asserted by any Third Party against an
          Indemnified Party arising from or in any way related to actual or
          alleged defamation, libel, slander, interference with or
          misappropriation of proprietary or creative right, or any other injury
          to any person or property arising out of content transmitted by the
          Indemnified Party or such Party's end users, or any other act or
          omission of the Indemnified Party or such Party's end users.

     24.3 DISCLAIMER.  EXCEPT AS SPECIFICALLY PROVIDED TO THE CONTRARY IN THIS
          AGREEMENT, PROVIDER MAKES NO REPRESENTATIONS OR WARRANTIES TO CUSTOMER
          CONCERNING THE SPECIFIC QUALITY OF ANY SERVICES, UNBUNDLED NETWORK
          ELEMENTS OR FACILITIES PROVIDED UNDER THIS AGREEMENT.  PROVIDER
          DISCLAIMS, WITHOUT LIMITATION, ANY WARRANTY OR GUARANTEE OF
          MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, ARISING FROM
          COURSE OF PERFORMANCE, COURSE OF DEALING, OR FROM USAGES OF TRADE.

     24.4 Limitation of Liability.  Each Party's liability, whether in contract,
          tort or otherwise, shall be limited to direct damages, which shall not
          exceed the monthly charges for the Services, Unbundled Network
          Elements or facilities for the month during which the claim of
          liability arose.  Under no circumstance shall either Party be
          responsible or liable for indirect, incidental, or consequential
          damages, including, but not limited to, economic loss or lost business
          or profits, damages arising from the use or performance of equipment
          or software, or the loss of use of software or equipment, or
          accessories attached thereto, delay, error, or loss of data.  Should
          either Party provide advice, make recommendations, or supply other
          analysis related to the Services, unbundled network elements or
          facilities described in this Agreement, this limitation of liability
          shall apply to provision of such advice, recommendations, and
          analysis.

     24.5 Intellectual Property.  Neither Party shall have any obligation to
          defend, indemnify or hold harmless, or acquire any license or right
          for the benefit of, or owe any other obligation or have any liability
          to, the other based on or arising from any claim, demand, or
          proceeding by any Third Party alleging or asserting that the use of
          any circuit, apparatus, or system, or the use of any software, or the
          performance of any service or method, or the provision or use of any
          facilities by either Party under this Agreement constitutes direct or
          contributory infringement, or misuse or misappropriation of any
          patent, copyright, trademark, trade secret, or any other proprietary
          or intellectual property right of any Third Party.

25.  Multiple Counterparts.  This Agreement may be executed in multiple
     counterparts, each of which shall be deemed an original, but all of which
     shall together constitute but one and the same document.

26.  No Offer.  This Agreement will be effective only upon execution and
     delivery by both Parties and approval by the Commission in accordance with
     Section 252 of the Act.

27.  No Third Party Beneficiaries.  Except as may be specifically set forth in
     this Agreement, this Agreement does not provide and shall not be construed
     to provide third parties with any remedy, claim, liability, reimbursement,
     cause of action, or other right or privilege.

28.  Notices.  Any notice to a Party required or permitted under this
     Agreement shall be in writing and shall be deemed to have been received on
     the date of service if served personally, on the date receipt is
     acknowledged in writing by the recipient if delivered by regular U.S.
     mail, or on the date



                                     III-8


<PAGE>   30




     stated on the receipt if delivered by certified or registered mail or by a
     courier service that obtains a written receipt.  Upon prior immediate oral
     agreement of the parties' designated recipients identified below, notice
     may also be provided by facsimile, internet or electronic messaging system,
     which shall be effective if sent before 5:00 p.m. on that day, or if sent
     after 5:00 p.m. it will be effective on the next Business Day following the
     date sent.  Any notice shall be delivered using one of the alternatives
     mentioned in this section and shall be directed to the applicable address
     indicated below or such address as the Party to be notified has designated
     by giving notice in compliance with this section:


<TABLE>
<S>                        <C>
If   to GTE:               GTE Central

                           Attention:  State Director, External Affairs
                           1000 GTE Drive
                           Building "A"
                           Wentzville, Missouri 63385
                           Facsimile number:  (314) 332-7991
                           Internet Address:

If to DTI:                 Digital Teleport, Inc.
                           Attention:  J.W. Sheehy, Vice President, I.C. Support
                           11111 Dorsett Road
                           St. Louis, Missouri 63043
                           Facsimile number:  (314) 253-6699
                           Internet Address:
</TABLE>

29.  Protection.

     29.1 Impairment of Service.  The characteristics and methods of operation
          of any circuits, facilities or equipment of either Party connected
          with the services, facilities or equipment of the other Party pursuant
          to this Agreement shall not interfere with or impair service over any
          facilities of the other Party, its affiliated companies, or its
          connecting and concurring carriers involved in its services, cause
          damage to their plant, violate any applicable law or regulation
          regarding the invasion of privacy of any communications carried over
          the Party's facilities or create hazards to the employees of either
          Party or to the public (each hereinafter referred to as an "Impairment
          of Service").

     29.2 Resolution.  If either Party causes an Impairment in Service, the
          Party whose network or service is being impaired (the "Impaired
          Party") shall promptly notify the Party causing the Impairment of
          Service (the "Impairing Party") of the nature and location of the
          problem and that, unless promptly rectified, a temporary
          discontinuance of the use of any circuit, facility or equipment may be
          required.  The Impairing Party and the Impaired Party agree to work
          together to attempt to promptly resolve the Impairment of Service.  If
          the Impairing Party is unable to promptly remedy the Impairment of
          Service, then the Impaired Party may at its option temporarily
          discontinue the use of the affected circuit, facility or equipment.

30.  Publicity.  Any news release, public announcement, advertising, or any
     form of publicity pertaining to this Agreement, provision of Services,
     Unbundled Network Elements or Facilities pursuant to it, or association of
     the Parties with respect to provision of the services described in this
     Agreement shall be subject to prior written approval of both GTE and DTI.

31.  Regulatory Agency Control.  This Agreement shall at all times be subject
     to changes, modifications, orders, and rulings by the Federal
     Communications Commission and/or the applicable state regulatory
     commission to the extent the substance of this Agreement is or becomes
     subject to the jurisdiction of such agency.



                                     III-9


<PAGE>   31




32.  Changes in Legal Requirements.  GTE and DTI further agree that the terms
     and conditions of this Agreement were composed in order to effectuate the
     legal requirements in effect at the time the Agreement was produced.  Any
     modifications to those requirements will be deemed to automatically
     supersede any terms and conditions of this Agreement.

33.  Effective Date.  If this Agreement or changes or modifications thereto
     are subject to approval of a regulatory agency, the "effective date" of
     this Agreement for such purposes will be ten (10) Business Days after such
     approval or in the event this Agreement is developed in whole or in part
     through arbitration, sixty (60) Business Days after such approval.  Such
     date (i.e., ten (10) or, if arbitrated, sixty (60) Business Days after the
     approval) shall become the "effective date" of this Agreement for all
     purposes.

34.  Regulatory Matters.  Each Party shall be responsible for obtaining and
     keeping in effect all their own FCC, state regulatory commission,
     franchise authority and other regulatory approvals that may be required in
     connection with the performance of its obligations under this Agreement.

35.  Rule of Construction.  No rule of construction requiring interpretation
     against the drafting party hereof shall apply in the interpretation of
     this Agreement.

36.  Section References.  Except as otherwise specified, references within an
     Article of this Agreement to a Section refer to Sections within that same
     Article.

37.  Service Standards.

     37.1 The Parties shall meet applicable quality of local service standards
          imposed by the Commission and will provide a level of services to each
          other under this Agreement in compliance with the nondiscrimination
          requirements of the Act.

     37.2 GTE and DTI agree to implement the performance measures defined in
          Appendix A.

     37.3 The Parties will alert each other to any network events that can
          result or have resulted in service interruption, blocked calls, and/or
          changes in network performance.

38.  Severability.  If any provision of this Agreement is held by a court or
     regulatory agency of competent jurisdiction to be unenforceable, the rest
     of the Agreement shall remain in full force and effect and shall not be
     affected unless removal of that provision results, in the opinion of
     either Party, in a material change to this Agreement.  If a material
     change as described in this paragraph occurs as a result of action by a
     court or regulatory agency, the Parties shall negotiate in good faith for
     replacement language.  If replacement language cannot be agreed upon
     within a reasonable period, either Party may terminate this Agreement
     without penalty or liability for such termination upon written notice to
     the other Party.

39.  Subcontractors.  Provider may enter into subcontracts with third parties
     or affiliates for the performance of any of Provider's duties or
     obligations under this Agreement.

40.  Subsequent Law.  The terms and conditions of this Agreement shall be
     subject to any and all applicable laws, rules, or regulations that
     subsequently may be prescribed by any federal, state or local governmental
     authority.  To the extent required by any such subsequently prescribed
     law, rule, or regulation, the Parties agree to modify, in writing, the
     affected term(s) and condition(s) of this Agreement to bring them into
     compliance with such law, rule, or regulation.

41.  Taxes.  Any state or local excise, sales, or use taxes (excluding any
     taxes levied on income) resulting from the performance of this Agreement
     shall be borne by the Party upon which the



                                     III-10


<PAGE>   32




     obligation for payment is imposed under applicable law, even if the
     obligation to collect and remit such taxes is placed upon the other Party.
     The collecting Party shall charge and collect from the obligated Party, and
     the obligated Party agrees to pay to the collecting Party, all applicable
     taxes, except to the extent that the obligated Party notifies the
     collecting Party and provides to the collecting Party appropriate
     documentation as GTE requires that qualifies the obligated Party for a full
     or partial exemption.  Any such taxes shall be shown as separate items on
     applicable billing documents between the Parties.  The obligated Party may
     contest the same in good faith, at its own expense, and shall be entitled
     to the benefit of any refund or recovery, provided that such Party shall
     not permit any lien to exist on any asset of the other Party by reason of
     the contest.  The collecting Party shall cooperate in any such contest by
     the other Party.  The other Party will indemnify the collecting Party from
     any sales or use taxes that may be subsequently levied on payments by the
     other Party by the collecting Party.

     41.1 Tax - A charge which is statutorily imposed by the state or local
          jurisdiction and is either (a) imposed on the seller with the seller
          having the right or responsibility to pass the charge(s) on to the
          purchaser and the seller is responsible for remitting the charge(s) to
          the state or local jurisdiction or (b) imposed on the purchaser with
          the seller having an obligation to collect the charge(s) from the
          purchaser and remit the charge(s) to the state or local jurisdiction.

     Taxes shall include but not be limited to:  federal excise tax, state/local
     sales and use tax, state/local utility user tax, state/local
     telecommunication excise tax, state/local gross receipts tax, and local
     school taxes.  Taxes shall not include income, income-like, gross receipts
     on the revenue of a provider, or property taxes.  Taxes shall not include
     payroll withholding taxes unless specifically required by statute or
     ordinance.

     41.2 Fees/Regulatory Surcharges - A charge imposed by a regulatory
          authority, other agency, or resulting from a contractual obligation,
          in which the seller is responsible or required to collect the
          fee/surcharge from the purchaser and the seller is responsible for
          remitting the charge to the regulatory authority, other agency, or
          contracting party.

     Fees/Regulatory Surcharges shall include but not be limited to E911/911,
     E311/311, franchise fees, Lifeline, hearing impaired, and Commission
     surcharges.

42.  Trademarks and Trade Names.  Except as specifically set out in this
     Agreement, nothing in this Agreement shall grant, suggest, or imply any
     authority for one Party to use the name, trademarks, service marks, or
     trade names of the other for any purpose whatsoever.

43.  Waiver.  The failure of either Party to insist upon the performance of
     any provision of this Agreement, or to exercise any right or privilege
     granted to it under this Agreement, shall not be construed as a waiver of
     such provision or any provisions of this Agreement, and the same shall
     continue in full force and effect.

44.  Environmental Responsibility.

     44.1 GTE and DTI agree to comply with applicable federal, state and local
          environmental and safety laws and regulations including U.S.
          Environmental Protection Agency (EPA) regulations issued under the
          Clean Air Act, Clean Water Act, Resource Conservation and Recovery
          Act, Comprehensive Environmental Response, Compensation and Liability
          Act, Superfund Amendments and Reauthorization Act and the Toxic
          Substances Control Act and OSHA regulations issued under the
          Occupational Safety and Health Act of 1970.  Each Party has the
          responsibility to notify the other if Compliance inspections occur
          and/or


                                     III-11



<PAGE>   33




          citations are issued that impact any aspect of this Agreement such as
          occurring on a LEC Facility or involving DTI potential employee
          exposure.

     44.2 GTE and DTI shall provide notice of known and recognized
          physical hazards or hazardous chemicals that must include providing
          Material Safety Data Sheets (MSDSs) for materials existing on site
          or brought on site to the Facility.  Each Party is required to
          provide specific notice for potential imminent danger conditions
          which could include, but is not limited to, a defective utility pole
          or significant petroleum contamination in a manhole.

     44.3 GTE will make available additional environmental control or
          safety procedures for DTI to review and follow when working at a GTE
          Facility.  Providing these procedures, beyond government regulatory
          Compliance requirements, is the decision of GTE.  These
          practices/procedures will represent the regular work practices
          required to be followed by the employees and contractors of GTE for
          safety and environmental protection.

     44.4 Any materials brought, used or remaining at the Facility by
          DTI are owned by DTI.  DTI will indemnify GTE for these materials.
          No substantial new safety or environmental hazards can be created or
          new hazardous materials can be used at a GTE Facility.  DTI must
          demonstrate adequate emergency response capabilities for its
          materials used or remaining at the GTE Facility.

     44.5 When Third Party contamination is discovered at a GTE
          Facility, the Party uncovering the condition must notify the proper
          safety or environmental authority, if required under applicable laws
          or regulations.  DTI must also notify GTE of Third Party
          contamination it discovers at GTE facilities.  The cost causer
          (requiring access) will become the generator, as owner or operator,
          of any waste materials such as petroleum contaminated water, sewage
          or manhole sediment.  Notwithstanding Section 24 and Section 44.9 of
          this Article III, the cost causer (requiring access) shall indemnify
          the other Party hereunder.

     44.6 DTI should obtain and use its own environmental permits, if
          necessary.  If GTE's permit or EPA identification number must be
          used, DTI must comply with all of GTE's environmental processes
          including environmental "best management practices (BMP)" and/or
          selection of disposition vendors and disposal sites.

     44.7 DTI visitors must comply with GTE security, fire safety,
          safety, environmental and building practices/codes including
          equivalent employee training when working in GTE facilities.

     44.8 GTE and DTI shall coordinate plans or information required to
          be submitted to government agencies, such as emergency response
          plans and community reporting.  If fees are associated with filing,
          GTE and DTI must develop a cost sharing procedure.

     44.9 Notwithstanding Section 23, with respect to environmental
          responsibility under this Section 44, GTE and DTI shall indemnify,
          defend and hold harmless the other party from and against any claims
          (including, without limitation, Third Party claims for personal
          injury or real or personal property damage), judgments, damages
          (including direct and indirect damage, and punitive damages),
          penalties, fines, forfeitures, cost, liabilities, interest and
          losses proximately caused by the indemnifying Party's negligent or
          willful misconduct regardless of form, or in connection with the
          violation or alleged violation of any applicable requirement with
          respect to the presence or alleged presence of contamination arising
          out of the indemnifying party's acts or omissions concerning its
          operations at the Facility.

     44.10 Activities impacting safety or the environment of a Right of
          Way must be harmonized with the specific agreement and the
          relationship between GTE and the private land



                                     III-12


<PAGE>   34




          owner.  This could include limitations on equipment access due to
          environmental conditions (e.g., wetland area with equipment
          restrictions).

45.  TBD Prices.  Numerous provisions in this Agreement and its Attachments
     refer to pricing principles.  If a provision references prices in an
     Attachment and there are no corresponding prices in such Attachment, such
     price shall be considered "To Be Determined" (TBD).  With respect to all
     TBD prices, prior to DTI ordering any such TBD item, the Parties shall
     meet and confer to establish a price.  If the Parties are unable to reach
     agreement on a price for such item, an interim price shall be set for such
     item that is equal to the price for the nearest analogous item for which a
     price has been established (for example, if there is not an established
     price for a nonrecurring charge (NRC) for a specific network element, the
     Parties would use the NRC for the most analogous retail service for which
     there is an established price).  Any interim prices so set shall be
     subject to modification by any subsequent decision of the Commission.  If
     an interim price is different from the rate subsequently established by
     the Commission, any underpayment shall be paid by DTI to GTE, and any
     overpayment shall be refunded by GTE to DTI, within 45 Business Days after
     the establishment of the price by the Commission.

46.  Amendment of Certain Rates, Terms and Conditions.  The Parties agree as
     follows with respect to modification of the rates, terms and conditions
     initially provided for herein:

     The rates, terms and conditions that are specified in Appendix 46A (the
     "GTE Terms") may be replaced by the rates, terms and conditions from the
     GTE/OtherCLEC Interconnection, Resale and Unbundling Agreement (the
     "OtherCLEC Agreements"), respectively, that are specified in Appendix 46B
     (the "OtherCLEC Terms") if and when the OtherCLEC Agreement becomes
     effective after approval by order of the Commission in Case No.    .  The
     rates, terms and conditions that are specified in Appendix 46B (the
     OtherCLEC Terms) shall not take effect for purposes of this Agreement until
     thirty (30) days following GTE's receipt of written notice of DTI's
     election to replace the specified GTE Terms with the specified OtherCLEC
     Terms, which notice may be given no earlier than the date the OtherCLEC
     Agreement is approved by the Commission and effective. GTE and DTI agree
     that if the OtherCLEC Terms are deemed to be unlawful, or are stayed,
     enjoined or otherwise modified, in whole or in part, by a court or
     commission of competent jurisdiction, then this Agreement shall be deemed
     to have been amended accordingly, by modification of the OtherCLEC Terms
     or, as appropriate, the substitution of GTE Terms for all stayed or
     enjoined OtherCLEC Terms, and such amendment shall be effective retroactive
     to the Effective Date of the OtherCLEC Terms.

     GTE and DTI further agree that the terms and conditions of this Agreement
     reflect certain requirements of the FCC's First Report and Order in CC
     Docket No. 96-98.  The terms and conditions of this Agreement shall be
     subject to any and all actions by any court or other governmental authority
     that invalidate, stay, vacate or otherwise modify the FCC's First Report
     and Order, in whole or in part ("subsequent action").  To the extent
     warranted by any such subsequent action, the Parties agree that this
     Agreement shall be deemed to have been modified accordingly as in the first
     paragraph of this Section 46.  The Parties agree to immediately apply any
     effected terms and conditions, including any in other sections and articles
     of this Agreement consistent with such subsequent action, and within a
     reasonable time incorporate such modified terms and conditions in writing
     into this Agreement.  If the OtherCLEC Terms are affected by such
     subsequent action and GTE determines they cannot be consistently applied
     therewith, the GTE Terms shall apply.  DTI acknowledges that GTE may seek
     to enforce such subsequent action before a commission or court of competent
     jurisdiction.  GTE does not waive any position regarding the illegality or
     inappropriateness of the FCC's First Report and Order.

     The rates, terms and conditions (including rates which may be applicable
     under true-up) specified in both the GTE Terms and the OtherCLEC Terms are
     further subject to amendment,



                                     III-13


<PAGE>   35




     retroactive to the Effective Date of the Agreement, to provide for charges
     or rate adjustments resulting from future Commission or other proceedings,
     including but not limited to any generic proceeding to determine GTE's
     unrecovered costs (e.g., historic costs, contribution, undepreciated
     reserve deficiency, or similar unrecovered GTE costs (including GTE's end
     user surcharge)), the establishment of a competitively neutral universal
     service system, or any appeal or other litigation.

     If the Commission (or any other commission or federal or state court) in
     reviewing this Agreement pursuant to applicable state or federal laws,
     including Section 252(e) of the Telecommunications Act of 1996, deletes or
     modifies in any way this Section 46, then the Parties agree that they will
     reopen negotiations within ten (10) days after receipt of the final
     decision making such deletion or modification in order to attempt to craft
     the new provision that will provide substantially the same protections to
     GTE and DTI as this Section 46.  If the Parties cannot reach agreement on
     such a provision within twenty (20) calendar days thereafter, the Parties
     agree that this entire Agreement is void and will not become effective, and
     DTI agrees to withdraw this Agreement from consideration by the Commission
     (or any other commission or federal or state court).  In such event, each
     Party shall have 25 days following the close of the 20-day negotiation
     period within which to file a petition for arbitration before the
     Commission under Section 252(e) of the Telecommunications Act of 1996 of
     the issues that remain in dispute under this paragraph.



                                     III-14


<PAGE>   36




                               ARTICLE IV

                GENERAL RULES GOVERNING RESOLD SERVICES

                         AND UNBUNDLED ELEMENTS

1.   General.  General regulations, terms and conditions governing rate
     applications, technical parameters, service availability, definitions and
     feature interactions, as described in the appropriate GTE intrastate
     local, toll and access tariffs, apply to retail services made available by
     GTE to DTI for resale and unbundled network elements provided by GTE to
     DTI, when appropriate, unless otherwise specified in this Agreement.  As
     applied to services or network elements offered under this Agreement, the
     term "Customer" contained in the GTE Retail Tariff shall be deemed to mean
     "DTI" as defined in this Agreement.

2.   Liability of GTE.

     2.1  Inapplicability of Tariff Liability.  GTE's general liability, as
          described in the GTE Retail Tariff, does not extend to DTI's customers
          or any other Third Party.  Liability of GTE to DTI resulting from any
          and all causes arising out of services, facilities, network elements
          or any other items relating to this Agreement shall be governed by the
          liability provisions contained in this Agreement and no other
          liability whatsoever shall attach to GTE.  GTE shall be liable for the
          individual services, facilities or elements that it separately
          provides to DTI and shall not be liable for the integration of
          components combined by DTI.

     2.2  DTI Tariffs or Contracts.  DTI shall, in its tariffs or other
          contracts for services provided to its end users using services,
          facilities or network elements obtained from GTE, provide that in no
          case shall GTE be liable to DTI's end users or any third parties for
          any indirect, special or consequential damages, including, but not
          limited to, economic loss or lost business or profits, whether
          foreseeable or not, and regardless of notification by DTI of the
          possibility of such damages and DTI shall indemnify and hold GTE
          harmless from any and all claims, demands, causes of action and
          liabilities based on any reason whatsoever from its customers as
          provided in this Agreement.  Nothing in this Agreement shall be deemed
          to create a third party beneficiary relationship with DTI's end users.

     2.3  No Liability for Errors.  GTE is not liable for mistakes that appear
          in GTE's listings, 911 and other information databases, or for
          incorrect referrals of end users to DTI for any ongoing DTI service,
          sales or repair inquiries, and with respect to such mistakes or
          incorrect referrals, DTI shall indemnify and hold GTE harmless from
          any and all claims, demands, causes of action and liabilities
          whatsoever, including costs, expenses and reasonable attorney's fees
          incurred on account thereof, by third parties, including DTI's end
          users or employees.  For purposes of this Section 2.3, mistakes and
          incorrect referrals shall not include matters arising out of the
          willful misconduct of GTE or its employees or agents.

3.   Unauthorized Changes.

     3.1  Procedures.  If DTI submits an order for resold services or unbundled
          elements under this Agreement in order to provide service to an end
          user that at the time the order is submitted is obtaining its local
          services from GTE or another LEC using GTE resold services or
          unbundled elements, and the end user notifies GTE that the end user
          did not authorize DTI to provide local exchange services to the end
          user, DTI must provide GTE with written documentation of authorization
          from that end user within thirty (30) Business Days of notification by
          GTE.  If DTI cannot provide written documentation of authorization
          within such time frame, DTI must within three (3) Business Days
          thereafter:



                                      IV-1


<PAGE>   37




     (a)  notify GTE to change the end user back to the LEC providing service to
          the end user before the change to DTI was made; and

     (b)  provide any end user information and billing records DTI has obtained
          relating to the end user to the LEC previously serving the end user;
          and

     (c)  notify the end user and GTE that the change back to the previous LEC
          has been made.

     Furthermore, GTE will bill DTI fifty dollars ($50.00) per affected line to
     compensate GTE for switching the end user back to the original LEC.

     3.2  Option to Restrict Changes Without Evidence of Authorization. DTI's or
          GTE's end users may request GTE to permit changes of their provider of
          local exchange services only upon end user written notification to GTE
          that the end user wishes to change the end user's provider of local
          exchange services.  In such a situation, GTE will not change an end
          user's provider of local exchange services without such written
          notification.

4.   Impact of Payment of Charges on Service.  DTI is solely responsible for
     the payment of all charges for all services, facilities and elements
     furnished under this Agreement, including, but not limited to, calls
     originated or accepted at its or its end users' service locations.  If DTI
     fails to pay when due any and all charges billed to DTI under this
     Agreement, including any late payment charges (collectively, "Unpaid
     Charges"), and any or all such charges remain unpaid more than forty-five
     (45) Business Days after the due date of such Unpaid Charges excepting
     previously disputed charges for which DTI may withhold payment, GTE shall
     notify DTI in writing that it must pay all Unpaid Charges to GTE within
     seven (7) Business Days.  If DTI disputes the billed charges, it shall,
     within said seven (7) day period, inform GTE in writing of which portion
     of the Unpaid Charges it disputes, including the specific details and
     reasons for the dispute, unless such reasons have been previously
     provided, and shall immediately pay to GTE all undisputed charges.  If DTI
     and GTE are unable, within thirty (30) Business Days thereafter, to
     resolve issues related to the disputed charges, then either DTI or GTE may
     file a request for arbitration under Article III of this Agreement to
     resolve those issues.  Upon resolution of any dispute hereunder, if DTI
     owes payment it shall make such payment to GTE with any late payment
     charge under Article III, Section 7.2, from the original payment due date.
     If DTI owes no payment, but has previously paid GTE such disputed
     payment, then GTE shall credit such payment including any late payment
     charges.  If DTI fails to pay any undisputed Unpaid Charges, DTI shall, at
     its sole expense, within five (5) Business Days notify its end users that
     their service may be disconnected for DTI's failure to pay Unpaid Charges,
     and that its end users must select a new provider of local exchange
     services.  If DTI fails to provide such notification or any of DTI's end
     users fail to select a new provider of services within the applicable time
     period, GTE will provide local exchange services to DTI's end users under
     GTE's applicable end user tariff at the then current charges for the
     services being provided.  In this circumstance, otherwise applicable
     service establishment charges will not apply to DTI's end user, but will
     be assessed to DTI.  GTE may discontinue service to DTI upon failure to
     pay undisputed charges as provided in this Section 4, and shall have no
     liability to DTI or DTI's end users in the event of such disconnection.

5.   Unlawful Use of Service.  Services, facilities or unbundled elements
     provided by GTE pursuant to this Agreement shall not be used by DTI or its
     end users for any purpose in violation of law.  DTI, and not GTE, shall be
     responsible to ensure that DTI and its end users use of services,
     facilities or unbundled elements provided hereunder comply at all times
     with all applicable laws.  GTE may refuse to furnish service to DTI or
     disconnect particular services, facilities or unbundled elements provided
     under this Agreement to DTI or, as appropriate, DTI's end user when (i) an
     order is issued by a court of competent jurisdiction finding that probable
     cause exists to believe that the use made or to be made of the service,
     facilities or unbundled elements is prohibited by



                                      IV-2


<PAGE>   38




     law or (ii) GTE is notified in writing by a law enforcement agency acting
     within its jurisdiction that any facility furnished by GTE is being used or
     will be used for the purpose of transmitting or receiving gambling
     information in interstate or foreign commerce in violation of law.
     Termination of service shall take place after reasonable notice is provided
     to DTI, or as ordered by the court.  If facilities have been physically
     disconnected by law enforcement officials at the premises where located,
     and if there is not presented to GTE the written finding of a court, then
     upon request of DTI and agreement to pay restoral of service charges and
     other applicable service charges, GTE shall promptly restore such service.

6.   Timing of Messages.  With respect to GTE resold measured rate local
     service(s), chargeable time begins when a connection is established
     between the calling station and the called station.  Chargeable time ends
     when the calling station "hangs up," thereby releasing the network
     connection.  If the called station "hangs up" but the calling station does
     not, chargeable time ends when the network connection is released by
     automatic timing equipment in the network.  Timing of messages applicable
     to GTE's Port and Local Switching element (usage sensitive services) will
     be recorded based on originating and terminating access.

7.   Procedures For Preordering, Ordering, Provisioning, Etc.  Certain
     procedures for preordering, ordering, provisioning, maintenance and
     billing and electronic interfaces for many of these functions are
     described in Appendix I.  All costs and expenses for any new or modified
     electronic interfaces DTI requires that GTE determines are technically
     feasible and GTE agrees to develop will be paid by DTI pursuant to
     Appendix I.  The schedule for implementation of any new or modified
     electronic interfaces will be developed by GTE according to industry
     standards and will be based upon the amount of work needed to design, test
     and implement the new or modified interface.

8.   Customer Contacts.  Except as otherwise provided in this Agreement or as
     agreed to in a separate writing by DTI, DTI shall provide the exclusive
     interface with DTI's end user customers in connection with the marketing
     or offering of DTI services.  Except as otherwise provided in this
     Agreement, in those instances in which GTE personnel are required pursuant
     to this Agreement to interface directly with DTI's end users, such
     personnel shall not identify themselves as representing GTE.  All forms,
     business cards or other business materials furnished by GTE to DTI end
     users shall bear no corporate name, logo, trademark or trade name other
     than DTI's.  In no event shall GTE personnel acting on behalf of DTI
     pursuant to this Agreement provide information to DTI end users about GTE
     products or services.



                                      IV-3


<PAGE>   39




                               ARTICLE V

        INTERCONNECTION AND TRANSPORT AND TERMINATION OF TRAFFIC

1.   Services Covered by This Article.

     1.1  Types of Services.  This Article governs the provision of internetwork
          facilities (i.e., physical interconnection services and facilities),
          meet point billing by GTE to DTI or by DTI to GTE and the transport
          and termination and billing of Local, IntraLATA Toll, optional EAS
          traffic and jointly provided Interexchange Carrier Access between GTE
          and DTI.  The services and facilities described in this Article shall
          be referred to in this Article V as the "Services."

     1.2  Service Locations for Interconnection Services and Facilities.
          Appendix B, Service Matrix, attached to this Agreement and made a part
          hereof, sets forth the Services and each location in the State where a
          Service shall be provided (the "Service Locations") and the
          Interconnection Point ("IP") for such Services.

     1.3  Additional Services or Service Locations.  If, during the term of this
          Agreement, the parties determine that additional services are needed
          in the State, or existing Services will be offered in new locations in
          the State, the Parties shall execute an amendment to this Agreement
          substantially in the form of Appendix C attached to this Agreement and
          made a part hereof, incorporating the additional locations and/or any
          additional terms necessary for the additional services.  Upon the
          effective date of the amendment, and continuing through the remaining
          term of this Agreement, the new services shall be deemed part of the
          Services provided pursuant to this Article and/or the new locations
          shall be deemed part of the Service Locations.

2.   Billing and Rates.

     2.1  Rates and Charges.  Customer agrees to pay to Provider the rates and
          charges for the Services set forth in the applicable appendices to
          this Agreement.  GTE's rates and charges are set forth in Appendix D
          attached to this Agreement and made a part hereof. DTI's separate
          rates and charges are also set forth in Appendix D attached hereto and
          made a part hereof.

     2.2  Billing.  Provider shall render to Customer a bill for interconnection
          services on a current basis.  Charges for physical facilities and
          other nonusage sensitive charges shall be billed in advance, except
          for charges and credits associated with the initial or final bills.
          Usage sensitive charges, such as charges for termination of Local
          Traffic, shall be billed in arrears.  DTI is required to order trunks
          pursuant to Section 4.3.3 of this Article. Charges for traffic that
          has been routed over a jurisdictionally inappropriate trunk group
          (e.g., local traffic carried over trunks used for Switched Access
          Traffic) may be adjusted to reflect the appropriate compensation
          arrangement and may be handled as a post-billing adjustment to bills
          rendered.  Additional matters relating to billing are included in
          Appendix I attached to this Agreement and made a part hereof.

3.   Transport and Termination of Traffic.

     3.1  Traffic to be Exchanged.  The Parties shall reciprocally terminate
          Local, IntraLATA Toll, optional EAS and jointly provided Interexchange
          Carrier Traffic originating on each other's networks utilizing either
          Direct or Indirect Network Interconnections as provided in Section 4
          or Section 5 herein.  To this end, the Parties agree that there will
          be interoperability between their networks. The Parties agree to
          exchange traffic associated with Third-Party



                                      V-1


<PAGE>   40




          LECs, CLECs and Wireless Service Providers pursuant to the
          compensation arrangement specified in Section 3.3 herein.  Only
          traffic originated by or terminating to the Parties' end user
          customers is to be exchanged.  In addition, the Parties will notify
          each other of any anticipated change in traffic to be exchanged (e.g.,
          traffic type, volume).

     3.2  Compensation For Exchange Of Traffic.

          3.2.1 Mutual Compensation.  The Parties shall compensate each other
                for the exchange of Local Traffic in accordance with Section
                3.2.2 of this Article.  The Parties will develop an initial
                factor representative of the share of traffic exempt from local
                compensation.  This factor will be updated quarterly in like
                manner or as the Parties otherwise agree.  Once the traffic that
                is exempt from local compensation can be measured, the actual
                exempt traffic will be used rather than the above factor.
                Charges for the transport and termination of intraLATA toll and
                interexchange traffic shall be in accordance with the Parties'
                respective intrastate or interstate access tariffs, as
                appropriate

          3.2.2 Bill-and-Keep.  The Parties shall assume that Local Traffic is
                roughly balanced between the parties unless traffic studies
                indicate otherwise.  Accordingly, the Parties agree to use a
                Bill-and-Keep Arrangement with respect to termination of Local
                Traffic only.  Either Party may request that a traffic study be
                performed no more frequently than once a quarter.  Should such
                traffic study indicate, in the aggregate, that either Party is
                terminating more than 60 percent of the Parties' total
                terminated minutes for Local Traffic, either Party may notify
                the other that mutual compensation will commence pursuant to the
                rates set forth in Appendix D of this Agreement and following
                such notice it shall begin and continue for the duration of the
                Term of this Agreement unless otherwise agreed.  To account for
                ISP traffic, the Parties will negotiate an initial factor(s)
                representative of the proportionate share of traffic exempt from
                local compensation.  This factor will be updated quarterly in a
                like manner or as the Parties otherwise agree. Once the traffic
                that is exempt from local compensation can be measured, the
                actual exempt traffic will be used rather than the above factor.
                Nothing in this Section 3.2.2 shall be interpreted to (i) change
                compensation set forth in this Agreement for traffic or services
                other than Local Traffic, including but not limited to
                internetwork facilities, access traffic or wireless traffic, or
                (ii) allow either Party to aggregate traffic other than Local
                Traffic for the purpose of compensation under the Bill-and-Keep
                Arrangement described in this Section 3.2.2, except as set forth
                in Section 3.1 above.

          3.2.3 Sharing of Access Charges on Calls to Ported Numbers.  Until
                permanent number portability is implemented, the Parties agree
                that switched access termination to a ported number will be
                billed by the party providing interim number portability and
                that the party billing the switched access will share the
                switched access revenue with the other party. After permanent
                number portability is implemented, the Parties agree to
                renegotiate sharing of access charges to ported numbers in
                accordance with permanent number portability requirements.  In
                lieu of actual measurements of minutes and/exchange of billing
                records for this traffic the Parties agree that the Party
                providing the ported number will pay the other Party the rate
                per line/per month as specified in Appendix E.

                (a)  The number of lines/talk paths per ported number that are
                     subject to compensation will be determined at the time the
                     end user customer's local service is changed from one party
                     to the other.  The number of lines per number eligible for
                     the shared revenue arrangement described



                                      V-2


<PAGE>   41




                     in this section will be limited to the number of lines in
                     service on the date of conversion plus a 10% growth margin.
                     After conversion the number of lines per number available
                     for compensation can only be increased by mutual consent of
                     the parties.

                (b)  The Parties agree that the compensation rate in paragraph
                     3.3.3 may change as a result of changes in access rates,
                     traffic volume or for other reasons and agree to
                     renegotiate the rate if a significant event occurs.  At a
                     minimum, the parties agree to reevaluate the rate on an
                     annual basis.

                (c)  The Parties agree that terminating switched access calls
                     ported via interim number portability may appear to the
                     receiving party to be a local call and that the
                     implementation of reciprocal compensation for terminating
                     local calls may result in overcompensation for ported
                     switched access calls. Therefore, the Parties agree to
                     renegotiate the terminating shared access compensation rate
                     if reciprocal compensation for local calls is implemented.

     3.3  Tandem Switching Traffic.  The Parties will provide tandem switching
          for traffic between the Parties' end offices subtending each other's
          access tandem, as well as for traffic between either Party's end users
          and any Third Party which is interconnected to the other Party's
          access tandems as follows:

          3.3.1 The originating Party will compensate the tandem Party for each
                minute of originated tandem switched traffic which terminates to
                Third Party (e.g., other CLEC, ILEC, or wireless service
                provider).  The applicable rate for this charge is identified in
                Appendix D.

          3.3.2 The originating Party also assumes responsibility for
                compensation to the company which terminates the call.

     3.4  Inter-Tandem Switching.  The Parties will only use inter-tandem
          switching for the transport and termination of local/EAS or intraLATA
          toll traffic originating on each other's network at and after such
          time as either (I) DTI has agreed to and fully implemented an existing
          intraLATA toll compensation mechanism such as IntraLATA Terminating
          Access Compensation (ITAC) or a functional equivalent thereof or (ii)
          generally accepted industry signaling standards and AMA record
          standards support the recognition of multiple tandem switching events.

4.   Direct Network Interconnection.

     4.1  Network Interconnection Architecture.  DTI may interconnect with GTE
          at any of the minimum technically feasible points required by the FCC.
          Interconnection at additional points will be reviewed on an individual
          case basis.  Where the Parties mutually agree following a Bona Fide
          Request to directly interconnect their respective networks,
          interconnection will be as specified in the following subsections.
          The "IPs" shall be set forth in Appendix B attached to this Agreement
          and made a part hereof.  Based on the configuration, the installation
          timeline will vary considerably, however, GTE will work with DTI in
          all circumstances to install "IPs" within 120 calendar days absent
          extenuating circumstances. Internetwork connection and protocol must
          be based on industry standards developed consistent with Section 256
          of the Telecommunications Act of 1996.



                                      V-3


<PAGE>   42




          4.1.1 Subject to mutual agreement, the Parties may use the following
                types of network facility interconnection, using such interface
                media as are (I) appropriate to support the type of
                interconnection requested and (ii) available at the facility at
                which interconnection is requested.  For each "IP" set forth in
                Appendix B, the Parties shall specify the type of
                interconnection used at that "IP."

                (a)  A Mid-Span Fiber Meet within an existing GTE exchange area
                     whereby the Parties mutually agree to jointly plan and
                     engineer their facility "IP" at a designated manhole or
                     junction location.  The "IP" is the demarcation between
                     ownership of the fiber transmission facility.  Each party
                     is individually responsible for its incurred costs in
                     establishing this arrangement.

                (b)  A Virtual or Physical EIS arrangement at a GTE wire center
                     subject to the rates, terms, and conditions contained in
                     GTE's applicable tariffs.

                (c)  A Special Access arrangement and/or Switched Transport
                     terminating at a GTE wire center subject to the rates,
                     terms, and conditions contained in GTE's applicable
                     tariffs.  These facilities will meet the standards set
                     forth in such tariffs.

          4.1.2 Virtual and Physical EIS arrangements are governed by
                appropriate GTE tariffs, except as provided in Article IX,
                Section 1.3.

          4.1.3 The Parties will mutually designate at least one POI on GTE's
                network within each GTE local calling area for the routing of
                Local Traffic.  Recording and billing of traffic routed over
                these facilities shall be as provided in Section 3.4 of this
                Article.

     4.2  Compensation.  The Parties agree to the following compensation for
          internetwork facilities, depending on facility type.

          4.2.1 Mid-Span Fiber Meet:  GTE will charge special access (flat
                rated) transport from the applicable intrastate access tariff
                and will rate charges between the "IP" and GTE's interconnection
                switch.  Charges will be reduced to reflect the proportionate
                share of the facility that is used for transport of traffic
                originated by GTE.  DTI will charge flat rated transport to GTE
                for DTI facilities used by GTE at their tariffed rates or as
                mutually agreed, not to exceed GTE rates. DTI will apply charges
                based on the lesser of; (i) the airline mileage from the "IP" to
                the DTI switch; or (ii) the airline mileage from the GTE switch
                to the serving area boundary.

          4.2.2 Collocation:  GTE will charge Virtual or Physical EIS rates from
                the applicable GTE tariff.  DTI will charge GTE flat rated
                transport at their tariffed rates or as mutually agreed, not to
                exceed GTE rates, to reflect the proportionate share of the
                facility that is used for transport of traffic originated by
                GTE.  DTI will apply charges based on the lesser of; (l) the
                airline mileage from the "IP" to the DTI switch; or (ii) two (2)
                times the airline mileage from the GTE switch to the serving
                area boundary.

          4.2.3 Special Access and/or Switched Access:  GTE will charge special
                access and/or switched access rates from the applicable GTE
                intrastate access tariff.  Charges will be reduced to reflect
                the proportionate share of the facility that is used for
                transport of traffic originated by GTE.  The Parties will
                negotiate an initial factor representative of the proportionate
                share of the facilities.  This factor will be updated quarterly
                in like manner or as the Parties otherwise agree.



                                      V-4


<PAGE>   43




     4.3  Trunking Requirements.

          4.3.1 The Parties agree to establish trunk groups of sufficient
                capacity from the interconnecting facilities such that trunking
                is available to any switching center designated by either Party,
                including end offices, tandems, 911 routing switches, and
                directory assistance/operator service switches. The Parties will
                mutually agree where one-way or two-way trunking will be
                available.  The Parties may use two-way trunks for delivery of
                local traffic or either Party may elect to provision its own
                one-way trunks for delivery of local traffic to the other Party.
                If a Party elects to provision its own one-way trunks, that
                Party will be responsible for its own expenses associated with
                the trunks.

          4.3.2 DTI shall make available to GTE trunks over which GTE shall
                terminate to end users of DTI-provided Exchange Services, Local
                Traffic and intraLATA toll or optional EAS traffic originated
                from end users of GTE-provided Exchange Service.

          4.3.3 DTI and GTE shall, where applicable, make reciprocally
                available, by mutual agreement, the required trunk groups to
                handle different traffic types.  DTI and GTE will support the
                provisioning of trunk groups that carry combined or separate
                Local Traffic and intraLATA toll and optional EAS traffic.  GTE
                requires separate trunk groups from DTI to originate and
                terminate interLATA calls and to provide Switched Access Service
                to IXCs.  To the extent DTI desires to have any Interexchange
                Carriers (IC) originate or terminate traffic to DTI, DTI will
                arrange for such IC to issue an ASR to GTE instructing GTE to
                route such traffic over the appropriate IC trunk group.  Until
                GTE receives and processes such ASR, the traffic will not be
                routed.

                4.3.3.1 Each Party agrees to route traffic only over the proper
                        jurisdictional trunk group.

                4.3.3.2 Each Party shall only deliver traffic over the local
                        interconnection trunk groups to the other Party's access
                        tandem for those publicly-dialable NXX Codes served by
                        end offices that directly subtend the access tandem or
                        to those wireless service providers that directly
                        subtend the access tandem.

                4.3.3.3 Neither party shall route Switched Access Service
                        traffic over local interconnection trunks, or local
                        traffic over Switched Access Service trunks.

          4.3.4 DTI and GTE will reciprocally provide Percent Local Usage (PLU)
                factors to each other on a quarterly basis to identify the
                proper jurisdiction of each call type that is carried over the
                required trunks.

          4.3.5 Reciprocal traffic exchange arrangement trunk connections shall
                be made at a DS-1 or multiple DS-1 level, DS-3, (SONET where
                technically available) and shall be jointly-engineered to an
                objective P.01 grade of service.

          4.3.6 DTI and GTE agree to use diligent efforts to develop and agree
                on a Joint Interconnection Grooming Plan prescribing standards
                to ensure that the reciprocal traffic exchange arrangement trunk
                groups are maintained at consistent P.01 or better grades of
                service.  Such plan shall also include mutually-agreed upon
                default standards for the configuration of all segregated trunk
                groups.



                                      V-5



<PAGE>   44




          4.3.7 Signaling System 7 (SS7) Common Channel Signaling will be used
                to the extent that such technology is available.

          4.3.8 The Parties agree to offer and provide to each other B8ZS
                Extended Superframe Format ("ESF") facilities, where available,
                capable of voice and data traffic transmission.

          4.3.9 The Parties will support intercompany 64kbps clear channel where
                available.

     4.4  Network Redesigns Initiated by GTE.  GTE will not charge DTI when GTE
          initiates its own network redesigns/reconfigurations.

     4.5  Interconnection Calling and Called Scopes for the Access Tandem
          Interconnection and the End Office Interconnection.

          4.5.1 GTE Access Tandem Interconnection calling scope (originating and
                terminating) is to those GTE end offices which subtend the GTE
                access tandem to which the connection is made except as provided
                for in Section 3.3 of this Article V.

          4.5.2 GTE End Office Interconnection calling scope (originating and
                terminating) is only to the end office to which the connection
                is made.

5.   Indirect Network Interconnection.  Neither Party shall deliver traffic
     destined to terminate at the other Party's end office via another LEC's end
     office.  In addition, neither Party shall deliver traffic destined to
     terminate at an end office subtending the other Party's access tandem via
     another LEC's access tandem until such time as compensation arrangements
     have been established in accordance with this Article V, Sections 3.1 and
     3.4.

6.   Number Resources.

     6.1  Number Assignment.  Nothing in this Agreement shall be construed to,
          in any manner, limit or otherwise adversely impact DTI's right to
          employ or to request and be assigned any NANP number resources
          including, but not limited to, Central Office (NXX) Codes pursuant to
          the Central Office Code Assignment Guidelines.  Any request for
          numbering resources by DTI shall be made directly to the NANP Number
          Plan Administrator.  Except with respect to those areas in which GTE
          is the NANP Number Plan Administrator, GTE shall not be responsible
          for the requesting or assignment of number resources to DTI.  The
          Parties agree that disputes arising from numbering assignment shall be
          arbitrated by the NANP Number Plan Administrator.  DTI shall not
          request number resources to be assigned to any GTE switching entity.

          6.1.1 Each Party shall be responsible for notifying its customers of
                any changes in numbering or dialing arrangements to include
                changes such as the introduction of new NPAs or new NXX codes.
                Each Party is responsible for administering NXX codes assigned
                to it.

     6.2  Rate Centers.  For purposes of compensation between the Parties and
          the ability of GTE to appropriately apply its toll tariff to its end
          user customers, DTI shall adopt the Rate Center areas and Rate Center
          points that the Commission has approved for the incumbent LEC and
          shall assign whole NPA-NXX codes to each Rate Center.

     6.3  Routing Points.  DTI will also designate a Routing Point for each
          assigned NXX code.  DTI may designate one location within each Rate
          Center as a Routing Point for the NPA-NXX associated with that Rate
          Center; alternatively DTI may designate a single location within



                                      V-6


<PAGE>   45




          one Rate Center to serve as the Routing Point for all the NPA-NXXs
          associated with that Rate Center and with one or more other Rate
          Centers served by DTI within an existing GTE exchange area and LATA.

     6.4  Code and Numbers Administration.  The Parties will comply with code
          administration requirements as prescribed by the FCC, the Commission,
          and accepted industry guidelines.  Where GTE is the NANP Number Plan
          Administrator, GTE will administer number resources, and charge for
          such administration in accord with applicable rules and regulations.
          GTE will administer numbering resources in a competitively neutral
          manner, and process requests for NXX codes in a timely manner and in
          accord with industry standards.  The Parties shall protect DTI
          proprietary information that may be submitted to GTE in connection
          with GTE's responsibilities as NANP Number Plan Administrator in
          accordance with Article III, Section 11 of this Agreement.

     6.5  Programming Switches.  It shall be the responsibility of each Party to
          program and update its own switches and network systems pursuant to
          the Local Exchange Routing Guide ("LERG") guidelines to recognize and
          route traffic to the other Party's assigned NXX codes at all times.
          Neither Party shall impose any fees or charges whatsoever on the other
          Party for such activities.

7.   Interim Number Portability (INP).  Each Party shall provide the other Party
     with INP for the purpose of allowing end user customers to change
     service-providing Parties without changing their telephone number.  GTE
     shall provide its INP to DTI using remote call forwarding ("RCF").  The GTE
     rates for INP service using RCF are set out in Appendix E attached to this
     Agreement and made a part hereof.  If DTI wishes to use Direct Inward
     Dialing ("DID") to provide INP to its end users, DTI may purchase DID
     service from GTE at the rate specified in the appropriate GTE tariff.  DTI
     shall provide INP to GTE at the rates specified for DTI in Appendix E.

8.   Meet-Point Billing.

     8.1  Meet-Point Arrangements.

          8.1.1 The Parties may mutually establish Meet-Point Billing ("MPB")
                arrangements in order to provide Switched Access Services to
                Access Service customers via a GTE access tandem in accordance
                with the MPB guidelines adopted by and contained in the Ordering
                and Billing Forum's MECAB and MECOD documents, except as
                modified herein and as described in Section 3.2.3 for Interim
                Portability.

          8.1.2 Except in instances of capacity limitations, GTE shall permit
                and enable DTI to sub-tend the GTE access tandem(s) nearest to
                the DTI Rating Point(s) associated with the NPA-NXX(s) to/from
                which the Switched Access Services are homed.  In instances of
                capacity limitation at a given access tandem, DTI shall be
                allowed to subtend the next-nearest GTE access tandem in which
                sufficient capacity is available.

          8.1.3 Interconnection for the MPB arrangement shall occur at the "IP".

          8.1.4 Common Channel Signaling shall be utilized in conjunction with
                MPB arrangements to the extent such signaling is resident in the
                GTE access tandem switch.

          8.1.5 DTI and GTE will use diligent efforts, individually and
                collectively, to maintain provisions in their respective federal
                and state access tariffs, and/or provisions within the National
                Exchange Carrier Association ("NECA") Tariff No. 4, or any
                successor tariff, sufficient to reflect this MPB arrangement,
                including MPB percentages.



                                      V-7


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          8.1.6 As detailed in the MECAB document, DTI and GTE will, in a timely
                fashion, exchange all information necessary to accurately,
                reliably and promptly bill Access Service customers for Switched
                Access Services traffic jointly handled by DTI and GTE via the
                meet-point arrangement.  Information shall be exchanged in
                Electronic Message Record ("EMR") format, on magnetic tape or
                via a mutually acceptable electronic file transfer protocol.

          8.1.7 DTI and GTE shall work cooperatively to coordinate rendering of
                Meet-Point bills to customers, and shall reciprocally provide
                each other usage data and related information at the appropriate
                charge.

     8.2  Compensation.

          8.2.1 Initially, billing to Access Service customers for the Switched
                Access Services jointly provided by DTI and GTE via the MPB
                arrangement shall be according to the multiple-bill method as
                described in the MECAB guidelines.  This means each Party will
                bill the portion of service they provided at their appropriate
                tariff, or price list.

          8.2.2 Subsequently, DTI and GTE may mutually agree to implement one of
                the following options for billing to third parties for the
                Switched Access Services jointly provided by DTI and GTE via the
                MPB arrangement:  single-bill/single tariff method,
                single-bill/multiple tariff method, or to continue the
                multiple-bill method.  Should either Party prefer to change
                among these billing methods, that Party shall notify the other
                Party of such a request in writing, ninety (90) Business Days in
                advance of the date on which such change is desired to be
                implemented, such changes then may be made in accordance with
                MECAB guidelines and if the Parties mutually agree, the change
                will be made.

9.   Common Channel Signaling.

     9.1  Service Description.  The Parties will provide Common Channel
          Signaling ("CCS") to one another via Signaling System 7 ("SS7")
          network interconnection, where and as available, in the manner
          specified in FCC Order 95-187, in conjunction with all traffic
          exchange trunk groups.  SS7 signaling and transport services shall be
          provided by GTE in accordance with the terms and conditions of this
          Section 9 of this Article and Appendix J attached to this Agreement
          and made a part hereof.  The Parties will cooperate on the exchange of
          all appropriate SS7 messages for local and intraLATA call set-up
          signaling, including ISUP and Transaction Capabilities Application
          Part ("TCAP") messages to facilitate full interoperability of all
          CLASS Features and functions between their respective networks.  Any
          other SS7 message services to be provided using TCAP messages (such as
          data base queries) will be jointly negotiated and agreed upon.

     9.2  Signaling Parameters.  All SS7 signaling parameters will be provided
          in conjunction with traffic exchange trunk groups, where and as
          available. These parameters include Automatic Number Identification
          ("ANI"), Calling Party Number ("CPN"), Privacy Indicator, calling
          party category information, originating line information, charge
          number, etc.  Also included are all parameters relating to network
          signaling information, such as Carrier Information Parameter ("CIP"),
          wherever such information is needed for call routing or billing.  GTE
          will provide SS7 via GR-394 SS7 and/or GR-317-SS7 format(s).

     9.3  Privacy Indicators.  Each Party will honor all privacy indicators as
          required under applicable law.

     9.4  Connection Through STP.  DTI must interconnect with the GTE STP(s)
          serving the LATA in which the traffic exchange trunk groups are
          interconnected.  Additionally, all interconnection to GTE's 800/888
          database and GTE's LIDB shall, consistent with this section and
          Appendix J attached hereto, take place only through appropriate STP
          pairs.


                                      V-8


<PAGE>   47




     9.5  Third Party Signaling Providers.  DTI may choose a third-party SS7
          signaling provider to transport messages to and from the GTE SS7
          network. In that event, that third-party provider must present a
          letter of agency to GTE, prior to the testing of the interconnection,
          authorizing the Third Party to act on behalf of DTI in transporting
          SS7 messages to and from GTE.  The third-party provider must
          interconnect with the GTE STP(s) serving the LATA in which the traffic
          exchange trunk groups are interconnected.

     9.6  Multi-Frequency Signaling.  In the case where CCS is not available, in
          band Multi-Frequency ("MF"), wink start, E & M channel associated
          signaling with ANI will be provided by the Parties.  Network signaling
          information, such as CIC/OZZ, will be provided wherever such
          information is needed for call routing or billing.

     10.  Service Quality and Performance.  Each Party shall provide Services
          under this Article to the other Party that are equal in quality to
          that the Party provides to itself, its Affiliates or any other entity.
          "Equal in quality" shall mean that the Service will meet the same
          technical criteria and performance standards that the providing Party
          uses within its own network for the same Service at the same location
          under the same terms and conditions.

     11.  Network Outages.  GTE shall work with DTI to establish reciprocal
          responsibilities for managing network outages and reporting.  Each
          party shall be responsible for network outage as a result of
          termination of its equipment in GTE wire center or access tandem.  DTI
          shall be responsible for notifying GTE of significant outages which
          could impact or degrade GTE switches and services.



                                      V-9


<PAGE>   48




                                   ARTICLE VI

                               RESALE OF SERVICES

1.   General.  The purpose of this Article VI is to define the Exchange
     Services and related Vertical Features and other Services (collectively
     referred to for purposes of this Article VI as the "Services") that may be
     purchased from GTE and resold by DTI and the terms and conditions
     applicable to such resold Services.  Except as specifically provided
     otherwise in this Agreement, provisioning of Exchange Services for resale
     will be governed by the GTE Guide.  GTE will make available to DTI for
     resale any Telecommunications Service that GTE currently offers, or may
     offer hereafter, on a retail basis to subscribers that are not
     telecommunications carriers, except as qualified by Section 2.2 below.

2.   Terms and Conditions.

     2.1  Quality and Performance.  GTE shall provide Services to DTI that are
          equal in quality and performance standards to the same Services
          provided by GTE to its own end user customers.

     2.2  Restrictions on Resale.  The following restrictions shall apply to the
          resale of retail services by DTI.

          2.2.1 DTI shall not resell Basic Exchange Residential Service.

          2.2.2 DTI shall not resell to one class of customers a service that is
                offered by GTE only to another class of customers in accordance
                with State requirements (e.g., R-1 to B-1, disabled services or
                Lifeline services to non-qualifying customers).

          2.2.3 DTI shall not resell public pay telephone lines.

          2.2.4 DTI shall not resell semi-public pay telephone lines.

     2.3  Restrictions on Discount of Retail Services.  The discount specified
          in Section 5.3 herein shall apply to all retail services except for
          the following:

          2.3.1 DTI shall resell services that are provided at a volume discount
                in accordance with terms and conditions of applicable tariff.
                DTI shall not aggregate end user traffic in order to qualify for
                volume discount.

          2.3.2 DTI shall resell ICB/Contract services without a discount and
                only to end user customers that already have such services.

          2.3.3 DTI shall resell COCOT coin or coinless line but no discount
                applies.

          2.3.4 DTI shall resell Lifeline services and services for the disabled
                but no discount shall apply and they shall only be resold to end
                user customers who qualify under GTE's tariffs and
                state/Commission rules, orders and regulations.

          2.3.5 DTI shall resell special access but no discount applies.

          2.3.6 DTI shall resell Operator Services and Directory Assistance as
                specified in Section 5.6 herein however no discount applies.

                                      VI-1
<PAGE>   49




          2.3.7 DTI shall resell promotional offerings that are ninety (90) days
                or less in duration without a discount.

     2.4  Resale to Other Carriers.  Services available for resale may not be
          used by DTI to provide access to the local network as an alternative
          to tariffed switched and special access by other carriers, including,
          but not limited to; interexchange carriers, wireless carriers,
          competitive access providers, or other retail telecommunications
          providers.

3.   Ordering and Billing.

     3.1  Local Service Request.  Orders for resale of Services will be placed
          utilizing a standard Local Service Request ("LSR") form.  GTE will
          continue to participate in industry forums for developing service
          order/disconnect order formats and will incorporate appropriate
          industry standards.  A complete and accurate LSR (containing the
          requisite end user information as described in the Guide) must be
          provided by DTI before a request can be processed.

     3.2  Certificate of Operating Authority.  When ordering, DTI must represent
          and warrant to GTE that it is a certified provider of local dial-tone
          service.  DTI will provide a copy of its Certificate of Operating
          Authority or other evidence of its status to GTE upon request.

     3.3  Letter of Authorization.  A Letter of Authorization ("LOA") will be
          required before resold Services will be provided in cases in which the
          subscriber currently receives Exchange Service from GTE or from a
          local service provider other than DTI.  Such LOA may be a blanket LOA
          or such other form as agreed upon between GTE and DTI.  GTE will not
          release information to DTI on GTE end user customer accounts unless
          DTI first provides to GTE a written LOA, signed by the end user
          customer, authorizing the release of such information to DTI or if
          state or federal law provides otherwise, in accordance with such law.

     3.4  Directory Assistance Listings.  GTE shall include a DTI customer
          listing in its Directory Assistance database as part of the Local
          Service Request ("LSR") process.  GTE will honor DTI Customer's
          preferences for listing status, including non-published and unlisted,
          as noted on the LSR and will enter the listing in the GTE database
          which is used to perform Directory Assistance functions as it appears
          on the LSR.

     3.5  Nonrecurring Charges.  DTI shall be responsible for the payment of all
          nonrecurring charges ("NRCs") applicable to resold Services (e.g.,
          installation, changes, ordering charges) in accordance with the
          appropriate tariff.  No discount applies to nonrecurring charges.

     3.6  Transfers Between DTI and Another Reseller of GTE Services.  When DTI
          has obtained an end user customer from another reseller of GTE
          services, DTI will inform GTE of the transfer by submitting a standard
          LSR to GTE.

     3.7  Local Calling Detail.  Except for those Services and in those areas
          where measured rate local service is available to end users, monthly
          billing to DTI does not include local calling detail.  However, DTI
          may request and GTE shall consider developing the capabilities to
          provide local calling detail in those areas where measured local
          service is not available for a mutually agreeable charge.

     3.8  Procedures.  An overview of the procedures for preordering, ordering,
          provisioning and billing for resold services are outlined in Appendix
          I, attached hereto and made a part hereof.

     3.9  LIDB.  For resale services, GTE's service order will generate updates
          to the LIDB for validation of calling card, collect, and third number
          billed calls.

                                      VI-2

<PAGE>   50




3.10 "OLN".  Upon request, GTE will update the database to provide Originating
     Line Number ("OLN") Screening which indicates to an operator the
     acceptable billing methods for calls originating from the calling number
     (e.g., penal institutions, COCOTS).

4.   Maintenance.

4.1  Maintenance, Testing and Repair.  GTE will provide repair and maintenance
     services to DTI and its end user customers for resold Services in
     accordance with the same standards and charges used for such services
     provided to GTE end user customers.  GTE will not initiate a maintenance
     call or take action in response to a trouble report from a DTI end user
     until such time as trouble is reported to GTE by DTI.  DTI must provide to
     GTE all end user information necessary for the installation, repair and
     servicing of any facilities used for resold Services according to the
     procedures described in the Guide.

4.2  Specifics and Procedures for Maintenance.  An overview of the procedures
     for maintenance of resold services and additional matters agreed to by the
     Parties concerning maintenance are set forth in Appendix I.

5.   Services Available for Resale.

5.1  Description of Local Exchange Services Available for Resale.  Resold
     basic Exchange Service includes, but is not limited to, the following
     elements:

      (a)  Voice Grade Local Exchange Access Line - includes a telephone
           number and dial tone.

      (b)  Local Calling - at local usage measured rates if applicable
           to the end user customer.

      (c)  Access to long distance carriers

      (d)  E-911 Emergency Dialing

      (e)  Access to Service Access Codes - e.g., 800, 888, 900

      (f)  Use of AIN Services (those currently available to end users)

      (g)  End User Private Line Services

      (h)  Listing of telephone number in appropriate "white pages"
           directory; and

      (i)  Copy of "White Pages" and "Yellow Pages" directories for the
           appropriate GTE service area

5.2  List of Services Available for Resale.  The type of Services listed on
     Appendix F, attached hereto and made a part of this Agreement, are
     available for resale by DTI.  Subject to the limitations on resale
     enumerated in this Article, any new services that GTE offers in the future
     at retail to customers who are not telecommunications carriers shall also
     be available to DTI for resale under the same terms and conditions
     contained in this Agreement.  Additional regulations, terms and conditions
     relating to the type of Services listed on Appendix F can be found in the
     appropriate intrastate local, toll and access tariffs.  Terms, conditions
     and other matters concerning rate applications, technical parameters,
     provisioning capability, definitions and feature interactions contained in
     such tariffs are applicable to the type of Services offered under this
     Agreement and are incorporated herein by reference.  Modifications to
     Services listed on Appendix F shall be provided to DTI in accordance with
     GTE's practices and procedures.

                                      VI-3

<PAGE>   51




5.3  Rates.  The prices charged to DTI for Local Services shall be calculated
     as follows:

      (1)  Avoided Cost Discount of 15.33% shall apply to all retail
           services except those services listed in Section 2.2 and Section 2.3
           herein.

      (2)  The discount dollar amount calculated under Step 1 above will
           be deducted from the retail rate.

      (3)  The resulting rate is the Wholesale Rate.

      (4)  This discount dollar amount in Step 2 above shall not change
           during the Term of this Agreement, even though GTE may change its
           retail rates.

5.4  Grandfathered Services.  Services identified in GTE Tariffs as
     grandfathered in any manner are available for resale only to end user
     customers that already have such grandfathered service.  An existing end
     user customer may not move a grandfathered service to a new service
     location.

5.5  Access.  GTE retains all revenue due from other carriers for access to
     GTE facilities, including both switched and special access charges.

5.6  Operator Services (OS) and Directory Assistance (DA).  Where GTE provides
     access to GTE Operator Services for local and toll assistance (for
     example, call completion, busy line verification and emergency
     interruption) and Directory Assistance (e.g., 411 calls routed to GTE's DA
     operator centers) as an element of Exchange Services offered for resale,
     DTI will be billed in accordance with Appendix F.  GTE will provide its
     existing OS and DA to a DTI at the same quality and in a nondiscriminatory
     manner as the service GTE's end users receive.

      5.6.1 Where Customized Routing is available (pursuant to Article
           VII, Section 12.1), GTE will offer unbranded OS and DA or rebranded
           OS and DA with the DTI brand.  GTE will provide such unbranding or
           rebranding on a switch-by-switch basis, subject to capability and
           capacity limitations.  Upon receipt of an order for unbranding or
           rebranding, GTE will implement within 90 Business Days when
           technically capable.

      5.6.2 DTI will be billed for unbranding or rebranding and
           Customized Routing.  Upon written request from DTI, GTE will provide
           DTI with terms and conditions for providing Customized Routing and
           branding, plus the applicable charges.  In addition, a port and
           dedicated trunk facilities are required as specified in Article VII,
           Section 12.1.4.

      5.6.3 For those offices that DTI has requested GTE to rebrand
           and/or unbrand OS and DA, GTE will provide it using live operators
           where GTE performs its own OS and DA service and where handled by
           automated systems.  If GTE uses a Third Party contractor to provide
           OS or DA, GTE will not provide branding nor will GTE negotiate it
           with a Third Party on behalf of DTI.  DTI must negotiate with the
           Third Party.  In these instances, DTI will need to purchase
           customized routing to differentiate OS/DA traffic between GTE's and
           a Third Party.

                                      VI-4

<PAGE>   52



                                  ARTICLE VII

                           UNBUNDLED NETWORK ELEMENTS

1.   General.  The purpose of this Article VII is to define the unbundled
     network elements that may be leased by DTI from GTE.  Unless otherwise
     specified in this Agreement, provisioning of unbundled network
     arrangements will be governed with the GTE Customer Guide for DTI
     Establishment of Services - Resale and Unbundling (the "Guide").
     Additional procedures for preordering, ordering, provisioning and billing
     of unbundled network elements are outlined in Appendix I.

2.   Unbundled Network Elements.

2.1  Categories.  There are several separate categories of Network Components
     that shall be provided as unbundled network elements by GTE:

      (a)  Network Interface Device or NID

      (b)  Loop Elements

      (c)  Port and Local Switching Elements

      (d)  Transport Elements

      (e)  Signaling Elements

      (f)  Data Switching

      (g)  Digital Cross Connect System (DCS)

2.2  Prices.  Individual unbundled network elements and prices are identified
     on Appendix G attached to this Agreement and made a part hereof, or under
     the appropriate GTE tariff as referenced in this Article.  Nonrecurring
     charges relating to unbundled elements are also listed on Appendix G.

      2.2.1 Reciprocal Compensation Arrangements for Call Termination.
           Reciprocal compensation arrangements for call termination shall be
           as provided in Appendix M attached hereto.

2.3  Interconnection to Unbundled Elements.  DTI may lease and interconnect to
     whichever of these unbundled network elements DTI chooses, and subject to
     technical feasibility, may combine these unbundled elements with any
     facilities or services that DTI may itself provide subject to the
     following:

      2.3.1 Interconnection shall be achieved via expanded interconnection/
            collocation arrangements DTI shall maintain at the wire center at 
            which the unbundled services are resident.

      2.3.2 DTI may order transport pursuant to Section 6 below as follows:

            (a)  From the wire center at which the unbundled elements (e.g., 
                 loop, port) are located to the GTE wire center where DTI has 
                 established an interconnection/collocation arrangement.

                                     VII-1
<PAGE>   53




            (b)  Directly from the DTI switch to a GTE wire center and connect 
                 to unbundled loops.  Applicable charges would be transport, 
                 transport termination, multiplexing, loop/port connector and 
                 loop.

      2.3.3 Each loop or port element shall be delivered to DTI collocation 
            arrangement over a loop/port connector applicable to the unbundled 
            services as listed on Appendix G.

      2.3.4 DTI shall combine unbundled network elements with its own 
            facilities.  GTE has no obligation to combine any network elements
            for DTI.  DTI may not combine such network elements to provide
            solely interexchange service or solely access service to an
            interexchange carrier.

2.4  Service Quality.  To the degree reasonably possible, all service
     attributes, grades-of-service and installation, maintenance and repair
     intervals which apply to the bundled service will apply to unbundled
     network elements.  Notwithstanding the foregoing, GTE shall not be
     responsible for impacts on service attributes, grades of service, etc.,
     resulting from DTI's specific use of or modification to any unbundled
     network element.

3.   Network Interface Device.

3.1  Direct Connection.  DTI shall be permitted to connect its own Loop
     directly to GTE's Network Interface Device or NID in cases in which DTI
     uses its own facilities to provide local service to an end user formerly
     served by GTE, as long as such direct connection does not adversely affect
     GTE's network.  In order to minimize any such adverse effects, DTI shall
     follow the procedures in Sections 3.1.1 and 3.1.2 below.

      3.1.1 When connecting its own loop facility directly to GTE's NID
            for a residence or business customer, DTI must make a clean cut on
            the GTE drop wire at the NID so that no bare wire is exposed.  DTI
            shall not remove or disconnect GTE's drop wire from the NID or take
            any other action that might cause GTE's drop wire to be left lying
            on the ground.

      3.1.2 At multi-tenant customer locations, DTI must remove the
            jumper wire from the distribution block (i.e. the NID) to the GTE
            cable termination block.  If DTI cannot gain access to the cable
            termination block, DTI must make a clean cut at the closest point to
            the cable termination block.  At DTl's request and discretion, GTE
            will determine the cable pair to be removed at the NID in
            multi-tenant locations.  DTI will compensate GTE for the trip charge
            necessary to identify the cable pair to be removed.

      3.1.3 GTE agrees to offer NIDs for lease to DTI but not for sale.
            DTI may remove GTE identification from any NID which it connects to
            a DTI loop, but DTI may not place its own identification on such
            NID.

      3.1.4 GTE Loop elements leased by DTI will be required to
            terminate only on a GTE NID.  If DTI leasing a GTE loop wants a DTI
            NID, they will also be required to lease a GTE NID for the direct
            loop termination and effect a NID to NID connection.

3.2  NID to NID Connection.  Rather than connecting its loop directly to GTE's
     NID, DTI may also elect to install its own NID and effect a NID to NID
     connection to gain access to the end user's inside wiring.

      3.2.1 DTI that provides its own loop facilities may elect to move
            all inside wire terminated on a GTE NID to one provided by DTI.  In
            this instance, a NID to NID connection will not be

                                     VII-2
<PAGE>   54




             required.  DTI, or the end user premise owner, can elect to leave
             the GTE disconnected NID in place, or to remove the GTE NID from
             the premise and dispose of it entirely.

3.3  Removal of Cable Pairs.  Removal of existing cable pairs required for DTI
     to terminate service is the responsibility of DTI.

3.4  Maintenance.  When DTI provides its own loop and connects directly to
     GTE's NID, GTE does not have the capability to perform remote maintenance.
     DTI can perform routine maintenance via its loop and inform GTE once the
     trouble has been isolated to the NID and GTE will repair (or replace) the
     NID, or, at DTI's option, it can make a NID to NID connection, using the
     GTE NID only to gain access to the inside wire at the customer location.

4.   Loop Elements.

4.1  Service Description.   a "Loop" is an unbundled component of Exchange
     Service.  In general, it is the transmission facility (or channel or group
     of channels on such facility) which extends from a Main Distribution Frame
     ("MDF') or functionally comparable piece of equipment in a GTE end office
     or wire center to a demarcation or connector block in/at a subscriber's
     premises.  Traditionally, Loops were provisioned as 2-wire or 4-wire
     copper pairs running from the end office MDF to the customer premises.
     However, a loop may be provided via other media, including radio
     frequencies, as a channel on a high capacity feeder/distribution facility
     which may, in turn, be distributed from a node location to the subscriber
     premises via a copper or coaxial drop facility, etc.

4.2  Categories of Loops.  There are six general categories of loops:

      4.2.1 "2-wire analog voice grade" loops will support analog
            transmission of 300-3000 Hz, repeat loop start or ground start
            seizure and disconnect in one direction (toward the end office
            switch), and repeat ringing in the other direction (toward the end
            user).  This loop is commonly used for local dial tone service;

      4.2.2 "4-wire analog voice grade" loops conform to the characteristics of 
            a 2-wire voice grade loop and, in addition, can support the 
            simultaneous independent transmission of information in both 
            directions;

      4.2.3 "2-wire digital" loops will support industry standard
            specifications for digital transmission.  Special provisioning
            (removal of bridge taps and/or load coils) will be required to
            conform to these industry standards.  The price for 2-wire digital
            loops shall be the price for the basic 2-wire loop plus the loop
            facility NRC to recover the cost of the special provisioning.

      4.2.4 "4-wire digital" loops will support industry standard
            specifications for digital transmission.  Special provisioning
            (removal of bridge taps and/or load coils) will be required to
            conform to these industry standards.  The price for 4-wire digital
            loops shall be the price for the basic 4-wire loop plus the loop
            facility NRC to recover the cost of the special provisioning.

      4.2.5 "DS-1" loops will support a digital transmission rate of
            1.544 Mbps.  The DS-1 loop will have no bridge taps or load coils
            and will employ special line treatment.  DS-1 loops will include
            span line repeaters where required, office terminating repeaters,
            and DSX cross connects.  Prices for DS-1 grade loops are the prices
            set forth in the appropriate GTE intrastate special access tariff.

                                     VII-3
<PAGE>   55




      4.2.6 "DS-3" loops will support the transmission of isochronous
           bipolar serial data at a rate of 44.736 Mbps.  This DS-3 type of
           loop provides the equivalent of 28 DS-1 channels and shall include
           the electronics at either end.

4.3  Conditioned Loops.  DTI may also require that the loops ordered above be
     conditioned in order for them to provide the end-user service.  Examples
     of this type of conditioning are:  Type C, Type DA, Improved C, Clear
     Channel, etc.  The price for such a conditioned loops shall be the
     applicable charge as provided in the appropriate GTE intrastate special
     access tariff.

4.4  Features, Functions, Attributes.  To the degree reasonably possible, all
     transport-based features, functions, service attributes,
     grades-of-service, installation, maintenance and repair intervals that
     apply to the bundled services will apply to unbundled loops.

      4.4.1 GTE will not perform routine testing of the unbundled loop
           for maintenance purposes.  DTI will be required to provision a loop
           testing device either in its central office (switch location),
           Network Control Center or in its collocation arrangement to test the
           unbundled loop.  GTE will perform repair and maintenance once
           trouble is identified by DTI.

      4.4.2 All Loop facilities furnished by GTE on the premises of
           DTI's end users and up to the network interface or functional
           equivalent are the property of GTE.  GTE must have access to all
           such facilities for network management purposes.  GTE employees and
           agents may enter said premises at any reasonable hour to test and
           inspect such facilities in connection with such purposes or, upon
           termination or cancellation of the Loop facility, to remove such
           facility.

      4.4.3 GTE will provide loop transmission characteristics to DTI
           end users which are equal to those provided to GTE end users.

      4.4.4 If DTI leases loops which are conditioned to transmit
           digital signals, as a part of that conditioning, GTE will test the
           loop and provide recorded test results to DTI.  In maintenance and
           repair cases, if loop tests are taken, GTE will provide any recorded
           readings to DTI at time the trouble ticket is closed in the same
           manner as GTE provides to itself and its end users.

4.5  Digital Loop Carrier.  Where GTE utilizes integrated digital loop carrier
     ("IDLC")1 technology to provision the Loop element, GTE will take the
     necessary affirmative steps to provide unbundled Loops.  The basic Loop
     provided will support voice grade services.  Loop capabilities beyond
     voice grade (i.e., ISDN, ADSL, etc.) will be provided under the terms and
     conditions, and at the prices indicated in Section 4.3.

      4.5.1 GTE will permit DTI to collocate digital loop carriers and
           associated equipment in conjunction with collocation arrangements
           DTI maintains at a GTE wire center for the purpose of
           interconnecting to unbundled Loop elements.

4.6  Unbundled Loop Facility Certification.

      4.6.1 Before deploying any service enhancing copper cable
           technology (e.g., HDSL, ISDN, etc.) over unbundled 2-wire analog
           voice grade loops leased from GTE, DTI shall notify GTE of

____________________
1 See Bellcore TR-TSY-000008, Digital Interface Between the SLC-96 Digital Loop
Carrier System and Local Digital Switch and TR-TSY-000303, Integrated Digital
Loop Carrier (IDLC) Requirements, Objectives and Interface.


                                     VII-4
<PAGE>   56




            such intentions to enable GTE to assess the loop transport
            facilities to determine whether there are any existing copper cable
            loop transport technologies (e.g., analog carrier, etc.) deployed
            within the same cable sheath that would be interfered with if DTI
            deployed the proposed service enhancing copper cable technology.
            If there are existing copper cable loop transport technologies
            already deployed within the same cable sheath, or if GTE already
            has existing near term (within 18 months of the date of facility
            certification) plans to deploy copper cable loop transport
            technologies that would be interfered with as described above, GTE
            will so inform DTI and DTI shall not be permitted to deploy such
            service enhancing copper cable technologies.  GTE will charge DTI
            the applicable engineering time and labor costs to perform the
            certification.

      4.6.2 If DTI fails to notify GTE of its plans to deploy service
           enhancing copper cable technology and obtain prior certification
           from GTE of the facilities, if DTI's deployment of such technology
           is determined to have caused interference with existing or planned
           copper cable loop transport technologies deployed by GTE in the same
           cable sheath, DTI will immediately remove such service enhancing
           copper cable technology and shall reimburse GTE for all incurred
           expense related to this interference.

4.7  Unbundled Loop Facility Notification.

      4.7.1 GTE reserves the right to deploy within its network at its
           sole discretion any and all copper cable loop transport
           technologies.  If GTE plans to deploy copper cable loop transport
           technology within a cable sheath in which such technology was not
           previously deployed, GTE will provide notice to DTI of such planned
           deployment, indicating all service enhancing copper cable
           technologies that would cause interference with the technology to be
           deployed, or that would be interfered with by the deployment of such
           technology.  Such notice will be provided at least ninety (90)
           Business Days in advance of the planned deployment.  If DTI has
           deployed any technologies within the same cable sheath that would
           interfere with, or be interfered with, by the technology GTE plans
           to deploy, the parties will work together to resolve the situation.

4.8  Subloops.

      4.8.1 GTE will provide as separate items the loop distribution, loop 
           concentrator and loop feeder on a case-by-case basis pursuant to a 
           Bona Fide Request ("BFR").

      4.8.2 GTE will design and construct loop access facilities (including loop
           feeders and loop concentration/multiplexing systems) in accordance 
           with standard industry practices as reflected in applicable tariffs 
           and/or as agreed to by GTE and DTI.

      4.8.3 Transport for loop concentrators/multiplexers services not
           supported by embedded technologies will be provided pursuant to
           applicable tariffs or as individually agreed upon by GTE and DTI.
           The Parties understand that embedded loop concentrators/multiplexers
           are not necessarily capable of providing advanced and/or digital
           services.

      4.8.4 GTE will provide loop transmission characteristics as specified in 
           Section 4.4.3 herein.

5.   Port and Local Switching Elements.

5.1  Port.  Port is an unbundled component of Exchange Service that provides
     for the interconnection of individual loops or trunks to the switching
     components of GTE's network.  In general, it is a line card or trunk card
     and associated peripheral equipment on GTE end office switch that serves
     as the hardware termination for the end user's Exchange Service on that
     switch and generates dial

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      tone and provides the end user access to the public switched
      telecommunications network.  The port does not include such features and
      functions which are provided as part of Local Switching. Each line-side
      port is typically associated with one (or more) telephone number(s),
      which serve as the end user's network address.

5.2  Ports Available as Unbundled Network Elements.  There are four types of
     Ports available as unbundled network elements;

      5.2.1 "2-wire analog line" Port is a line side switch connection
           employed to provide basic residential and business type Exchange
           Service.

      5.2.2 "2-wire ISDN digital line" Port is a Basic Rate Interface
           (BRI) line side switch connection employed to provide ISDN Exchange
           Services.

      5.2.3 "DS-1 digital trunk" Port is a direct inward dialing (DID)
           trunk side switch connection employed to provide the equivalent of
           24 analog incoming trunk type Exchange Services.

      5.2.4 "4-wire ISDN digital DS-1 trunk" Port is a Primary Rate
           Interface (PRI) trunk side switch connection employed to provide the
           ISDN Exchange Services

5.3  Port Prices.  Prices for 2-wire analog and DS-1 Ports are listed in
     Appendix G.  2-wire ISDN line side Ports and 4-wire ISDN trunk side Ports
     shall be provided at a price agreed to by the Parties.

5.4  Local Switching.  Local switching provides the basic switching functions
     to originate, route and terminate traffic and any signaling deployed in
     the switch.  Vertical features are optional services provided through
     software programming in the switch which can be added on a per-feature
     basis with applicable rate.  GTE will offer only those features and
     functions currently available to the particular platform used (e.g., DMS,
     5ESS, GTD5).  Any feature or function which is not available, but the
     switch is capable of providing, may be requested via the BFR process.  DTI
     will be responsible for bearing any costs incurred by GTE in making such
     feature/function available, including Right-to-Use (RTU) fees.  The rates
     for Local Switching and Vertical Features are listed in Appendix G.

      5.4.1 DTI must purchase Local Switching with the line-side Port or
           trunk-side Port, if applicable.

5.5  Compliance with Section 2.3.  DTI shall only order unbundled elements in
     accordance with Section 2.3 herein and it will be the responsibility of
     DTI to make arrangements for the delivery of interexchange traffic and
     routing of traffic over interoffice transmission facilities, if
     applicable.

6.   Transport Facility.

6.1  Service Description.  Transport is an unbundled component of Exchange
     Service.  In general, it is the transmission facility (or channel or group
     of channels on such facility) which extends from a Main Distribution Frame
     (MDF) or functionally comparable piece of equipment in a GTE end office or
     access tandem to either (l) another MDF or functionally comparable piece
     of equipment in a GTE end office or access tandem, or (ii) a meet point
     with transport facilities of DTI or another carrier.  Transport may be
     provided over a variety of media, including, but not limited to, copper
     cables, radio frequencies or channels on a high capacity facility.

      6.1.1 Tandem Switching Capability.  GTE will provide tandem
           switching capability at GTE access tandems for traffic between DTI
           and GTE end offices subtending the GTE access tandem and for traffic
           between DTI and non-GTE end offices subtending GTE access tandems.
           GTE will provide the features and functions that are

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            centralized in tandem switches including but not limited to call
            recording, the routing of calls to operator services when
            technically feasible, and signaling conversion features.

6.2  Categories/Types.  Unbundled transport is provided under rates, terms and
     conditions of the applicable GTE access tariff or local private line
     tariff.

7.   SS7 Transport and Signaling.  SS7 signaling and transport services in
     support of DTI's local exchange services shall be provided in accordance
     with the terms and conditions of Appendix I attached to this Agreement and
     made a part hereof.

7.1  GTE will provide interconnection with its SS7 at the STPs but not at
     other points.

8.   LIDB Services.  Access to GTE's LIDB shall be provided in accordance with
     the rates, terms and conditions of GTE's switched access tariff, GTOC
     Tariff FCC No. 1, Section 8.

9.   Database 800-Type Services.  Access to GTE's 800-Type database (i.e.,
     888, 877) shall be provided in accordance with the rates, terms and
     conditions of GTE's switched access tariff, GTOC Tariff FCC No. 1, Section
     8.

10.  Data Switching.

10.1 Access.  GTE will provide unbundled access to GTE data switches to DTI at
     the user network interface ("UNI") and network to network interface
     ("NNI") level subject to mutual agreement on technical standards.

10.2 Nondiscrimination.  Data switching features and functionalities provided
     to DTI will be without discrimination with respect to the way GTE provides
     them to GTE end users.  In the event of overflow or congestion conditions
     on the data switching network, DTI's data traffic carried on GTE
     facilities will be equal priority to GTE data traffic.

10.3 Testing, Monitoring, Administration and Maintenance.  Testing,
     monitoring, administration and maintenance will be performed by GTE in a
     nondiscriminatory manner.

11.  Digital Cross Connect System (DCS).

11.1 Access.  GTE will provide unbundled access to the DCS element, which
     shall provide automated cross-connection (with CNC), facility grooming,
     bridging (MJU-digital), point to multipoint connections (DMB-analog),
     broadcast and automated facility test capabilities.  These functionalities
     will be provided consistent with that which is provided to GTE end users.
     DTI shall submit a Bona Fide Request to GTE specifying these
     functionalities.

11.2 Optional Characteristics.  The DCS element may include multiplexing,
     format conversion, signaling conversion and manual cross connection
     wiring.

11.3 Alternate Provisioning.  Where no automated DCS capability exists, the
     cross connection function will be provided manually by GTE through the
     combination of DSX patch panels and D4 banks or DS0 (or higher capacity)
     equipment.

11.4 Elements.  DTI will have access to the following DCS elements:

      (a)  DS0 with DS1 interface (CNC)

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      (b)  DS1/VT1.5 with DS1, DS3 and SONET interfaces (CNC and Titan
           5500)

11.5 Capabilities.  The DCS elements will provide the following capabilities:

      (a)  Real-time configuration (with CNC)

      (b)  Real-time access to integrated test equipment (with React and
           Customer Service)

      (c)  SONET asynchronous gateway functionality (with Titan 5500
           only)

      (d)  Compliance with Bellcore and industry standards.

11.6 Protection and Performance.  The unbundled DCS elements provided to DTI
     will have equipment/interface protection, redundant power supply and/or
     battery backup and performance/availability consistent with that provided
     to GTE end users.

11.7 Provisioning, Administration and Maintenance.  GTE will provide
     provisioning, administration and maintenance of the DCS elements the same
     level as GTE provides to itself as well as real time access to performance
     monitoring and alarm data affecting DTI traffic (with CNC).  GTE is not
     required to keep software updated to the "current available release" in
     every instance.

12.  Operator Services (OS) and Directory Assistance (DA).  GTE will provide
     OS and DA to DTI in accordance with the terms set forth as follows:

      12.0.1 Where Customized Routing is available, GTE will offer unbranded OS
           and DA or rebranded OS and DA with the DTI brand.  GTE will provide
           such unbranding or rebranding on a switch-by-switch basis, subject
           to capability and capacity limitations.  Upon receipt of an order
           for unbranding or rebranding, GTE will implement within 90 Business
           Days when technically capable.

      12.0.2 DTI will be billed an element charge for OS and DA and a charge
           for unbranding or rebranding and Customized Routing as set forth in
           Section 12.1.2.  In addition, charges specified in Section 12.1.4
           will apply.

      12.0.3 For those offices that DTI has requested GTE to rebrand and/or
           unbrand OS and DA, GTE will provide it using live operators where
           GTE performs its own OS and DA service and where handled by
           automated systems.  If GTE uses a Third Party contractor to provide
           OS or DA, GTE will not provide branding nor will GTE negotiate it
           with a Third Party on behalf of DTI.  DTI must negotiate with the
           Third Party.  In these instances, DTI will need to purchase
           customized routing to differentiate OS/DA traffic between GTE's and
           a Third Party.

12.1 Customized Routing.  Where technically feasible and upon receipt of
     written request from DTI, GTE agrees to provide customized routing for the
     following types of calls:

                        0-
                        0+Local
                        0+411
                        1+411
                        0+HNPA-555-1212 (intraLATA, only when intraLATA
                        presubscription is not available)
                        1+HNPA-555-1212 (intraLATA, only when intraLATA
                        presubscription is not available)

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      12.1.1 GTE will provide DTI a list of switches that can provide
           customized routing using line class codes or similar method
           (regardless of current capacity limitations).  DTI will return a
           list of these switches ranked in priority order.  GTE will return to
           DTI a schedule for customized routing in the switches with existing
           capabilities and capacity.

      12.1.2 Upon written request from DTI, GTE will provide DTI with
           applicable charges, and terms and conditions, for providing OS and
           DA, branding, and Customized Routing.

      12.1.3 Subject to the above provisions, GTE will choose the method of
           implementing customized routing of OS and DA calls.

      12.1.4 The use of customized routing will require the purchase of a trunk
           side port and dedicated facilities between the GTE end office and
           the designated OS/DA platform.  The rates for these elements will be
           billed in accordance with Appendix G.

13.  Advanced Intelligent Network Access (AIN).  GTE will provide DTI access
     to GTE AIN functionality from GTE's AIN SCP via GTE's local switch or
     DTI's local switch.

14.  Nondiscrimination Provision and Support.  GTE agrees to provide unbundled
     network elements in a timely manner considering the need and volume of
     requests.  GTE will provide unbundled network elements in a
     non-discriminatory manner and shall provide power to such elements on the
     same basis as GTE provides to itself.

15.  Provisioning Intervals.  GTE agrees to provide unbundled network elements
     in a timely manner considering the need and volume of requests, pursuant
     to agreed upon service provisioning intervals.

16.  Directory Assistance Listing.  When DTI orders an unbundled port, a
     Directory Service Request (DSR) must be submitted to have the listing
     included in GTE's Directory Assistance database.  The applicable ordering
     charge will be applied for processing the DSR.

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                              ARTICLE VIII

        ADDITIONAL SERVICES AND COORDINATED SERVICE ARRANGEMENTS

1. Bona Fide Request Process.

1.1  Intent.  The Bona Fide Request process is intended to be used when DTI
     requests customized Service Orders for certain services, features,
     capabilities or functionality defined and agreed upon by the Parties as
     services to be ordered as Bona Fide Requests.

1.2  Process.

 1.2.1 A Bona Fide Request shall be submitted in writing by DTI and shall
      specifically identify the need to include technical requirements, space
      requirements and/or other such specifications that clearly define the
      request such that GTE has sufficient information to analyze and prepare a
      response.

 1.2.2 Although not expected to do so, DTI may cancel a Bona Fide Request in
      writing at any time prior to DTI and GTE agreeing to price and
      availability.  GTE will then cease analysis of the request.

 1.2.3 Within two (2) Business Days of its receipt, GTE shall acknowledge in
      writing the receipt of the Bona Fide Request and identify a single point
      of contact and any additional information needed to process the request.

 1.2.4 Except under extraordinary circumstances, within ten (10) Business
      Days of its receipt of a Bona Fide Request, GTE shall provide a proposed
      price and availability date, or it will provide an explanation as to why
      GTE elects not to meet DTI's request.  If extraordinary circumstances
      prevail, GTE will inform DTI as soon as it realizes that it cannot meet
      the ten (10) Business Day response due date.  DTI and GTE will then
      determine a mutually agreeable date for receipt of the request.

 1.2.5 Unless DTI agrees otherwise, all proposed prices shall be consistent
      with the pricing principles of the Act, FCC and/or the Commission.
      Payments for services purchased under a Bona Fide Request will be made
      upon delivery, unless otherwise agreed to by DTI, in accordance with the
      applicable provisions of the Agreement.

 1.2.6 Upon affirmative response from GTE, DTI will submit in writing its
      acceptance or rejection of GTE's proposal.  If at any time an agreement
      cannot be reached as to the terms and conditions or price of the request
      GTE agrees to meet, the Dispute resolution procedures described in
      Article III herein may be used by a Party to reach a resolution.

2.   Transfer of Service Announcements.  For services other than GTE resold
     and ported number services, when an end user customer transfers service
     from one Party to the other Party, and does not retain its original
     telephone number, the Party formerly providing service to the end user
     will provide, upon request and if such service is provided to its own
     customers, a referral announcement on the original telephone number.  This
     announcement will provide the new number of the customer and will remain
     in effect for the same time period this service is provided to GTE's own
     end users.  For GTE resold and ported number services, GTE shall provide
     an intercept referral on behalf of DTI.

3.   Misdirected Calls.  The Parties will employ the following procedures for
     handling any misdirected calls (e.g., Business office, repair bureau,
     etc.).

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3.1  To the extent the correct provider can be determined, each Party will
     refer misdirected calls to the proper provider of local exchange service.
     When referring such calls, both Parties agree to do so in a courteous
     manner, at no charge.

3.2  For misdirected repair calls, the Parties will provide their respective
     repair bureau contact number to each other on a reciprocal basis and
     provide the end user the correct contact number.

3.3  In responding to misdirected calls, neither Party shall make disparaging
     remarks about each other, nor shall they use these calls as a basis for
     internal referrals or to solicit end users or to market services.

4.   911/E911 Arrangements.

4.1  Description of Service.  DTI will install a minimum of two (2) dedicated
     trunks to GTE's 911/E911 selective routers (i.e., 911 tandem offices) that
     serve the areas in which DTI provides Exchange Services, for the provision
     of 911/E911 services and for access to all subtending PSAPs.  The
     dedicated trunks shall be, at a minimum, DS-0 level trunks configured as a
     2-wire analog interface or as part of a digital (1.544 Mbps) interface in
     which all circuits are dedicated to 9-1-1 traffic.  Either configuration
     shall use CAMA type signaling with multifrequency ("MF") tones that will
     deliver ANI with the voice portion of the call.  GTE will provide DTI with
     the appropriate CLLI codes and specifications of the tandem office serving
     area or the location of the primary PSAP when there is no 911 routing in
     that 911 district.  If a DTI central office serves end users in an area
     served by more than one (1) GTE 911/E911 selective router, DTI will
     install a minimum of two (2) dedicated trunks in accordance with this
     Section to each of such 911/E911 selective routers or primary PSAP.

4.2  Transport.  If DTI desires to obtain transport from GTE to the GTE 911
     selective routers, DTI may purchase such transport from GTE at the rates
     set forth in Appendix H.

4.3  Cooperation and Level of Performance.  The Parties agree to provide
     access to 911/E911 in a manner that is transparent to the end user.  The
     Parties will work together to facilitate the prompt, reliable and
     efficient interconnection of DTI's systems to the 911/E911 platforms, with
     a level of performance that will provide the same grade of service as that
     which GTE provides to its own end users.  To this end, GTE will provide
     documentation to DTI showing the correlation of its rate centers to its
     E911 tandems at rates set forth in Appendix H.

4.4  Basic 911 and E911 General Requirements:

      4.4.1 Basic 911 and E911 provides a caller access to the
           appropriate emergency service bureau by dialing a 3-digit universal
           telephone number (911).

      4.4.2 Where GTE has a 911 selective router installed in the
           network serving the 911 district, GTE shall use subscriber data
           derived from the Automatic Location Identification/Database
           Management System (ALI/DMS) to selectively route the 911 call to the
           Public Safety Answering Point (PSAP) responsible for the caller's
           location.

      4.4.3 All requirements for E911 also apply to the use of SS7 as a
           type of signaling used on the interconnection trunks from the local
           switch to an end office or a selective router.

      4.4.4 Basic 911 and E911 functions provided to DTI shall be at
           least at parity with the support and services that GTE provides to
           its subscribers for such similar functionality.

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      4.4.5 Basic 911 and E911 access from Local Switching shall be
           provided to DTI in accordance with the following:

            4.4.5.1 GTE and DTI shall conform to all state regulations
                 concerning emergency services.

            4.4.5.2 For E911, both DTI and GTE shall use their respective
                 service order processes to update access line subscriber data
                 for transmission to the database management systems.
                 Validation will be done via MSAG comparison listed in Section
                 4.4.5.5.

            4.4.5.3 If legally required by the appropriate jurisdiction, GTE
                 shall provide or overflow 911 traffic to be routed to GTE
                 Operator Services or, at DTI's discretion, directly to DTI
                 Operator Services.

            4.4.5.4 Basic 911 and E911 access from the DTI local switch shall
                 be provided from GTE to DTI in accordance with the following:

                    4.4.5.4.1 If required by DTI and technically feasible, GTE
                         shall interconnect direct trunks from the DTI network
                         to the E911 PSAP, or to the E911 selective routers as
                         designated by DTI.  Such trunks may alternatively be
                         provided by DTI.

                    4.4.5.4.2 In government jurisdictions where GTE has
                         obligations under existing Agreements as the primary
                         provider of the 911 System to the county (i.e., "lead
                         telco"), DTI shall participate in the provision of the
                         911 System as follows:

                             4.4.5.4.2.1 Each Party shall be responsible for
                                  those portions of the 911 System for which it
                                  has control, including any necessary
                                  maintenance to each Party's portion of the
                                  911 System.

                             4.4.5.4.2.2 DTI and GTE recognize that the lead
                                  telco in a 911 district has the
                                  responsibility of maintaining the ALI
                                  database for that district.  Each company
                                  will provide its access line subscriber
                                  records to the database organization of that
                                  lead telco.  DTI and GTE will be responsible
                                  for correcting errors when notified by either
                                  the 911 district or its customer, and then
                                  submitting the corrections to the lead telco.
                                  Lead telco database responsibilities are
                                  covered in Section 4.4.5.5 of this Article.

                             4.4.5.4.2.3 DTI shall have the right to verify the
                                  accuracy of information regarding DTI
                                  customers in the ALI database using methods
                                  and procedures mutually agreed to by the
                                  Parties.  The fee for this service shall be
                                  determined based upon the agreed upon
                                  solution.

                    4.4.5.4.3 If a Third Party is the primary service provider
                         to a 911 district, DTI shall negotiate separately with
                         such Third Party with regard to the provision of 911
                         service to the agency.  All relations between such

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                                  Third Party and DTI are totally separate from
                                  this Agreement and GTE makes no
                                  representations on behalf of the Third Party.

                    4.4.5.4.4 If DTI or Affiliate is the primary service
                         provider to a 911 district, DTI and GTE shall
                         negotiate the specific provisions necessary for
                         providing 911 service to the agency and shall include
                         such provisions in an amendment to this Agreement.

                    4.4.5.4.5 Interconnection and database access shall be at
                         rates as set forth in Appendix H.

                    4.4.5.4.6 GTE shall comply with established, competitively
                         neutral intervals for installation of facilities,
                         including any collocation facilities, diversity
                         requirements, etc.

                    4.4.5.4.7 In a resale situation, where it may be
                         appropriate for GTE to update the ALI database, GTE
                         shall update such database with DTI data in an
                         interval no less than is experienced by GTE
                         subscribers, or than for other carriers, whichever is
                         faster, at no additional cost.

            4.4.5.5 The following are Basic 911 and E911 Database Requirements:

                    4.4.5.5.1 The ALI database shall be managed by GTE, but is
                         the property of GTE and any participating LEC or DTI
                         which provides their records to GTE.

                    4.4.5.5.2 Copies of the MSAG shall be provided within five
                         (5) business days after the date the request is
                         received and provided on diskette or paper copy at the
                         rates set forth in Appendix H.

                    4.4.5.5.3 DTI shall be solely responsible for providing DTI
                         database records to GTE for inclusion in GTE's ALI
                         database on a timely basis.

                    4.4.5.5.4 GTE and DTI shall arrange for the automated input
                         and periodic updating of the E911 database information
                         related to DTI end users.  GTE shall work
                         cooperatively with DTI to ensure the accuracy of the
                         data transfer by verifying it against the Master
                         Street Address Guide ("MSAG").  GTE shall accept
                         electronically transmitted files or magnetic tape that
                         conform to National Emergency Number Association
                         ("NENA") Version #2 format.

                    4.4.5.5.5 DTI shall assign an E911 database coordinator
                         charged with the responsibility of forwarding DTI end
                         user ALI record information to GTE or via a
                         third-party entity, charged with the responsibility of
                         ALI record transfer.  DTI assumes all responsibility
                         for the accuracy of the data that DTI provides to GTE.

                    4.4.5.5.6 GTE shall update the database within one (1)
                         business day of receiving the data from DTI.  If GTE
                         detects an error in the DTI provided data, the data
                         shall be returned to DTI within one day from when it
                         was provided to GTE.  DTI shall respond to requests
                         from GTE to make corrections to database record errors
                         by

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                             uploading corrected records within one day.
                             Manual entry shall be allowed only in the event
                             that the system is not functioning properly.

                    4.4.5.5.7 GTE agrees to treat all data on DTI subscribers
                         provided under this Agreement as strictly confidential
                         and to use data on DTI subscribers only for the
                         purpose of providing E911 services.

                    4.4.5.5.8 GTE shall adopt use of a Carrier Code (NENA
                         standard five-character field) on all ALI records
                         received from DTI.  The Carrier Code will be used to
                         identify the carrier of record in NP configurations.
                         The NENA Carrier Code for DTI is "DTI"; the NENA
                         Carrier Code for GTE is "GTE."

            4.4.5.6 GTE and DTI will comply with the following requirements for
                 network performance, maintenance and trouble notification.

                    4.4.5.6.1 Equipment and circuits used for 911 shall be
                         monitored at all times.  Monitoring of circuits shall
                         be done to the individual trunk level.  Monitoring
                         shall be conducted by GTE for trunks between the
                         selective router and all associated PSAPs.

                    4.4.5.6.2 Repair service shall begin immediately upon
                         report of a malfunction.  Repair service includes
                         testing and diagnostic service from a remote location,
                         dispatch of or in-person visit(s) of personnel.  Where
                         an on-site technician is determined to be required, a
                         technician will be dispatched without delay.

                    4.4.5.6.3 GTE shall notify DTI forty-eight (48) hours in
                         advance of any scheduled testing or maintenance
                         affecting DTI 911 service.  GTE shall provide
                         notification as soon as possible of any unscheduled
                         outage affecting DTI 911 service.

                    4.4.5.6.4 All 911 trunks must be capable of transporting
                         Baudot Code necessary to support the use of
                         Telecommunications Devices for the Deaf ("TTY/TDDs").

            4.4.5.7 Basic 911 and E911 Additional Requirements

                    4.4.5.7.1 All DTI lines that have been ported via INP shall
                         reach the correct PSAP when 911 is dialed.  Where GTE
                         is the lead telco and provides the ALI, the ALI record
                         will contain both the DTI number and GTE ported
                         number.  The PSAP attendant shall see both numbers
                         where the PSAP is using a standard ALI display screen
                         and the PSAP extracts both numbers from the data that
                         is sent.  GTE shall cooperate with DTI to ensure that
                         911 service is fully available to all DTI end users
                         whose telephone numbers have been ported from GTE,
                         consistent with State provisions.

                    4.4.5.7.2 DTI and GTE shall be responsible for reporting
                         all errors, defects and malfunctions to one another.
                         GTE and DTI shall provide each other with a point of
                         contact for reporting errors, defects, and

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                             malfunctions in the service and shall also provide
                             escalation contacts.

                    4.4.5.7.3 DTI may enter into subcontracts with third
                         parties, including DTI Affiliates, for the performance
                         of any of DTI's duties and obligations stated herein.

                    4.4.5.7.4 Where GTE is the lead telco, GTE shall provide
                         DTI           with notification of any pending
                         selective router moves within at least ninety (90)
                         days in advance.

                    4.4.5.7.5 Where GTE is the lead telco, GTE shall establish
                         a process for the management of NPA splits by
                         populating the ALI database with the appropriate new
                         NPA codes.

                    4.4.5.7.6 Where GTE is the lead telco, GTE shall provide
                         the ability for DTI to update 911 database with end
                         user information for lines that have been ported via
                         INP or LNP.

            4.4.6 Basic 911 and E911 Information Exchanges and interfaces.  
                 Where GTE is the lead telco:

                    4.4.6.1 GTE shall provide DTI access to the ALI Gateway
                         which interfaces to the ALI/DMS database.  GTE shall
                         provide error reports from the ALI/DMS database to DTI
                         within one (1) day after DTI inputs information into
                         the ALI/DMS database.  Alternately, DTI may utilize
                         GTE or a Third Party entity to enter subscriber
                         information into the database on a demand basis, and
                         validate subscriber information on a demand basis.
                         The rates are set forth in Appendix H.

                    4.4.6.2 GTE and DTI shall arrange for the automated input
                         and periodic updating of the E911 database information
                         related to DTI end users.  GTE shall work
                         cooperatively with DTI to ensure the accuracy of the
                         data transfer by verifying it against the Master
                         Street Address Guide ("MSAG").  GTE shall accept
                         electronically transmitted files or magnetic tape that
                         conform to National Emergency Number Association
                         ("NENA") Version #2 format.

                    4.4.6.3 Updates to MSAG.  Upon receipt of an error
                         recording an DTI subscriber's address from GTE, and
                         where GTE is the lead telco, it shall be the
                         responsibility of DTI to ensure that the address of
                         each of its end users is included in the Master Street
                         Address Guide ("MSAG") via information provided on
                         DTI's Local Service Request ("LSR") or via a separate
                         feed established by DTI pursuant to Section 4.4.5.7 of
                         this Article.

                    4.4.6.4 The ALI database shall be managed by GTE, but is
                         the property of GTE and all participating telephone
                         companies.  The interface between the E911 Switch or
                         Tandem and the ALI/DMS database for DTI subscriber
                         shall meet industry standards.

4.5  Compensation.  In situations in which GTE is responsible for maintenance
     of the 911/E911 database and can be compensated for maintaining DTI's
     information by the municipality, GTE will seek such compensation from the
     municipality.  GTE will seek compensation from DTI only if, and to the
     extent, that GTE is unable to obtain such compensation from the
     municipality.  GTE

                                     VIII-6

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      shall charge DTI a portion of the cost of the shared 911/E911 selective
      router as set forth in Appendix H.

5.   Information Services Traffic.

5.1  Routing.  Each Party shall route traffic for Information Services (i.e.
     900-976, Internet, weather lines, sports providers, etc.) which originates
     on its network to the appropriate Information Service Platform.

5.2  Billing and Collection and Information Service Provider (ISP)
     Remuneration.

      5.2.1 In the event GTE performs switching of ISP traffic
           associated with resale or unbundled network elements for DTI, GTE
           shall provide to DTI GTE's standard call detail records so as to
           allow DTI to bill its end users.  GTE shall not be responsible or
           liable to DTI or ISP for Billing and Collection and/or any
           receivables of Information Service Providers.

      5.2.2 Notwithstanding and in addition to Article III, Section 24,
           GTE shall be indemnified and held harmless by CLEC from and against
           any and all suits, actions, losses, damages, claims, or liability of
           any character, type, or description, including all expenses of
           litigation and court cost which may arise as a result of the
           provisions contained in this Article VIII, Section 5.2.1 supra.  The
           indemnity contained in this section shall survive the termination of
           this Agreement, for whatever reason.

      5.2.3 GTE agrees to notify DTI in writing within ten (10) working
           days, by registered or certified mail at DTI's address of any claim
           made against GTE on the obligations indemnified against pursuant to
           this Article VIII, Section 5.

      5.2.4 It is understood and agreed that the indemnity provided for
           in this Article VIII, Section 5 is to be interpreted and enforced so
           as to provide indemnification of liability to GTE to the fullest
           extent now or hereafter permitted by law.

5.3  900-976 Call Blocking.  GTE shall not unilaterally block 900-976 traffic
     in which GTE performs switching associated with resale or unbundled
     network elements.  GTE will block 900-976 traffic when requested to do so,
     in writing, by DTI.  DTI shall be responsible for all cost associated with
     the 900-976 call blocking request.  GTE reserves the right to block any
     and all calls which may harm or damage its network.

5.4  Miscellaneous.  GTE reserves the right to provide to any Information
     Service Provider a list of any and all Telecommunications Providers doing
     business with GTE.

6.   Telephone Relay Service.  Local and intraLATA Telephone Relay Service
     ("TRS") enables deaf, hearing-impaired, or speech-impaired TRS users to
     reach other telephone users.  With respect to resold services, DTI's end
     users will have access to the state authorized TRS provider to the extent
     required by the Commission, including any applicable compensation
     surcharges.

7.   Directory Assistance (DA) and Operator Services (OS).  Where DTI is
     providing local service with its own switch, upon DTI's request GTE will
     provide to DTI rebranded or unbranded directory assistance services and/or
     operator services pursuant to separate contracts to be negotiated in good
     faith between the Parties.  If DTI so requests directory assistance
     services and/or operator services, such contracts shall provide for the
     following:

7.1  Directory Assistance Calls.  GTE directory assistance centers shall
     provide number and addresses to DTI end users in the same manner that
     number and addresses are provided to

                                     VIII-7

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      GTE end users.  If information is provided by an automated response unit
      ("ARU"), such information shall be repeated twice in the same manner in
      which it is provided to GTE end users.  Where available, GTE will provide
      call completion to DTI end users in the same manner that call completion
      is provided to GTE end users.  GTE will provide its existing services to
      DTI end users consistent with the service provided to GTE end users.

7.2  Operator Services Calls.  GTE operator services provided to DTI end users
     shall be provided in the same manner GTE operator services are provided to
     GTE end users.  In accordance with GTE practices and at GTE rates, GTE
     will offer to DTI end users collect, person-to-person, station-to-station
     calling, Third Party billing, emergency call assistance, calling card
     services, credit for calls, time and charges, notification of the length
     of call, and real time rating.  GTE operators shall also have the ability
     to quote DTI rates upon request but only if there is appropriate cost
     recovery to GTE and to the extent it can be provided within the technical
     limitations of GTE's switches.  GTE will provide its existing services to
     DTI end users consistent with the service GTE provides to its own end
     users.

8.   Directory Assistance Listings Information.  GTE will include listings in
     its directory assistance database for DTI end users in the same geographic
     area as GTE provides directory assistance for GTE end users as specified
     in Article VI, Section 3.4.

8.1  GTE shall provide to DTI, at DTI's request, for purposes of DTI providing
     DTI-branded directory assistance services to its local customers, within
     sixty (60) Business Days after an order for such tape is received, all
     published DA listings for that specific state via magnetic tape.  Such
     listings will be Confidential Information under this Agreement and DTI
     will use the listings only for its directory assistance services to its
     end users.  If DTI uses a Third Party directory assistance service to its
     end users, DTI will ensure that such Third Party likewise treats the
     listings as Confidential Information under this Agreement, and uses them
     only for such directory assistance.  Changes to the DA Listing Information
     shall be updated on a daily basis through the same means used to transmit
     the initial list.  DA Listing Information provided shall indicate whether
     the customer is a residence or business customer.  The rate to be paid by
     DTI to GTE will be reasonable and mutually agreed upon.

8.2  The Parties will not release DA Listing Information that includes the
     other Party's end user information to Third Parties without the other
     Party's written approval.  The other Party will inform the Releasing Party
     if it desires to have the Releasing Party provide the other Party's DA
     Listing Information to the Third Party, in which case, the Releasing Party
     shall provide the other Party's DA Listing Information at the same time as
     the Releasing Party provides the Releasing Party's DA Listing Information
     to the Third Party.  The rate to be paid by the Releasing Party to the
     other Party shall be no more than the direct costs of compiling such
     information.  The other Party shall be responsible for billing the Third
     Party.

8.3  The Parties will work together to identify and develop procedures for
     database error corrections.

9.   Directory Listings and Directory Distribution.  DTI will be required to
     negotiate a separate agreement for directory listings and directory
     distribution, except as set forth below, with GTE's directory publication
     company.

      Listings.  DTI agrees to supply GTE on a regularly scheduled basis, at no
      charge, and in a mutually agreed upon format (e.g. Ordering and Billing
      Forum developed), all listing information for DTI's subscribers who wish
      to be listed in any GTE published directory for the relevant operating
      area.  Listing information will consist of names, addresses (including
      city, state and zip code) and telephone numbers.  Nothing in this
      Agreement shall require GTE to publish a directory where it would not
      otherwise do so.

                                     VIII-8

<PAGE>   69




      Listing inclusion in a given directory will be in accordance with GTE's
      solely determined directory configuration, scope, and schedules, and
      listings will be treated in the same manner as GTE's listings.

      Distribution.  Upon directory publication, GTE will arrange for the
      initial distribution of the directory to service subscribers in the
      directory coverage area at no charge.

      DTI will supply GTE in a timely manner with all required subscriber
      mailing information including non-listed and non-published subscriber
      mailing information, to enable GTE to perform its distribution
      responsibilities.

10.  Busy Line Verification and Busy Line Verification Interrupt.  Each Party
     shall establish procedures whereby its operator assistance bureau will
     coordinate with the operator assistance bureau of the other Party to
     provide Busy Line Verification ("BLV") and Busy Line Verification and
     Interrupt ("BLVI") services on calls between their respective end users.
     Each Party shall route BLV and BLVI inquiries over separate inward
     operator services trunks.  Each Party's operator assistance bureau will
     only verify and/or interrupt the call and will not complete the call of
     the end user initiating the BLV or BLVI.  Each Party shall charge the
     other for the BLV and BLVI services at the rates contained in Appendix F,
     or if there is no applicable rate listed in Appendix F, at the rates in
     their respective tariffs.

11.  SAG.  GTE will provide to DTI upon request the Street Address Guide at a
     reasonable charge.  Two companion files will be provided with the SAG
     which lists all services and features at all LSOs, and lists services and
     features that are available in a specific LSO.

12.  Dialing Format Changes.  GTE will provide reasonable notification to DTI
     of changes to local dialing format, i.e., 7 to 10 digit, by end office.

13.  Operational Support Systems (OSS).  GTE shall provide OSS functions to
     DTI for ordering, provisioning and billing that are generally available as
     described in Appendix I attached to this Agreement.  DTI shall pay GTE for
     access to GTE's OSS functions consistent with processes defined in
     Appendix I.

                                     VIII-9

<PAGE>   70




                               ARTICLE IX

                              COLLOCATION

1.   Physical Collocation.  GTE shall provide to DTI physical collocation of
     equipment pursuant to 47 CFR Section  51.323 necessary for interconnection
     or for access to unbundled network elements, provided that GTE may provide
     virtual collocation in place of physical collocation, or in some cases
     deny a particular collocation request entirely, if GTE demonstrates that
     physical collocation, or perhaps even virtual collocation, is not
     practical because of technical reasons or space limitations, as provided
     in Section 251 (c)(6) of the Act.  GTE will work with DTI to install
     collocation arrangements within 120 calendar days absent extenuating
     circumstances, GTE will provide such collocation for purposes of
     interconnection or access to unbundled network elements pursuant to the
     terms and conditions in the applicable federal and state EIS tariffs.

1.1  Space Planning.  In addition to such provisions for space planning and
     reservation as may be set forth in the applicable GTE federal and state
     EIS tariffs, the parties agree to the following terms and conditions.

      1.1.1 GTE has the right to reserve space within its central
           offices for its own use based on a 5-year planning horizon.

      1.1.2 GTE will notify DTI if it plans to build an addition to a
           central office where DTI has collocated facilities, if such addition
           would result in a material increase of space available for
           collocation.

      1.1.3 Should DTI submit to GTE a two-year forecast for space
           planning for collocated facilities in a central office, GTE will, in
           good faith, consider and discuss such forecast with DTI when
           considering space planning or utilization decisions for such central
           office; provided, however that any final space planning or
           utilization decision shall be made by GTE in its sole discretion in
           light of GTE requirements.

      1.1.4 Subject to technical feasibility and space limitations, GTE
           will make available at applicable federal and state EIS tariffs such
           intraoffice facilities as may be necessary to accommodate projected
           volumes of DTI traffic.

1.2  Connection to Customer Loops and Ports.  Facilities for cross-connection
     to unbundled loops and ports shall be provided under the applicable GTE
     federal tariff for Special Access Cross Connect, until such time as a
     local tariff applicable to the facilities used for such cross-connection
     is filed.

1.3  Connection to Other Collocated Carriers.  Subject to technical
     feasibility and space limitations, DTI may interconnect with other
     carriers collocated at a GTE central office at which DTI has collocated
     facilities; provided, however, that DTI and such other carriers must be
     collocated at the GTE central office for the primary purpose of
     interconnecting with GTE or accessing GTE's unbundled network elements.
     If DTI wants to interconnect with other carriers collocated at a GTE
     central office, DTI must provide GTE with thirty Business Days' prior
     written notice, during which time GTE may elect to provide the facilities
     necessary to accomplish such interconnection.  DTI and the other
     collocated carriers may provide the necessary interconnection facilities
     only if GTE elects not to provide such facilities or fails to so elect
     within the thirty day notice period.  If GTE elects to provide
     interconnection facilities under this section, GTE will provide this cross
     connection under the GTE federal tariff for Special Access Cross Connect,
     until such time as a local tariff applicable to the facilities used for
     such interconnection facilities is filed.

                                      IX-1
<PAGE>   71




1.4  Choice of Vendor.  DTI may use the vendor of its choice to install,
     maintain and repair equipment within DTI's collocated space.  Access by
     the employees, agents or contractors of such vendor shall be subject to
     the same restrictions on access by employees, agents or contractors of DTI
     imposed under the applicable GTE federal and state EIS tariffs, including
     but not limited to certification and approval by GTE.

1.5  Monitoring.  Subject to technical feasibility and space limitations, DTI
     may extend its own facilities for remote monitoring of its collocated
     equipment to its collocated space.  DTI may request that GTE provide the
     facilities necessary for such remote monitoring, at which time GTE and DTI
     will negotiate in good faith the price, terms and conditions of remote
     monitoring by GTE.

1.6  Phone Service.  Upon ordering collocated space, DTI may order that its
     collocation cage be provided with plain old telephone service (POTS)
     commencing at such time as GTE has completed construction of the
     collocated space.  DTI shall pay separately for any ordered POTS service.

1.7  Intraoffice Diversity.  At DTI's request, GTE will provide diversity for
     ingress/egress fiber and power cables where such diversity is available
     and subject to technical feasibility and space limitations.

1.8  DTI Proprietary Information.  GTE will protect all DTI proprietary
     information to the extent required under non-disclosure agreements
     existing as of the date GTE completes construction of a physical
     collocation space at DTl's request.

1.9  Notification of Modifications.  GTE will notify DTI of modifications to
     collocation space in accord with the terms of applicable GTE state and
     federal EIS tariffs.  Additionally, GTE shall notify DTI when major
     upgrades are made to the power plants supporting DTI's collocation space.
     The following shall constitute such major upgrades:

      (a)  replacement of a rectifier;

      (b)  addition or replacement of a new fusing module;

      (c)  addition or replacement of a power distribution unit frame; or

      (d)  addition or replacement of modular rectifiers.

1.10 Drawings.  When DTI orders collocated space, GTE and DTI will hold a
     GTE/Customer meeting in accord with applicable GTE state and federal EIS
     tariffs.  At such meeting, GTE will provide such drawings of GTE's central
     office facility as may be necessary to adequately depict DTI's proposed
     collocation space.

1.11 Construction of Space.  GTE will construct DTI's collocation space in
     accord with the terms and conditions set forth in the applicable GTE state
     and federal EIS tariff.  Additionally, GTE agrees to the following terms
     and conditions regarding construction of collocated space:

      1.11.1 Space will be constructed in 100 square foot increments, and shall
           be designed so as to prevent unauthorized access.

      1.11.2 a standard 100 square foot cage shall have the following standard
           features:

             (a)  eight-foot high, nine gauge chain link panels;

                                      IX-2

<PAGE>   72




             (b)  three of the panels listed at (a) above shall
                  measure eight by ten feet, the fourth panel shall measure
                  eight by seven feet;

             (c)  the door to the cage shall measure eight by three feet and 
                  shall also consist of nine gauge chain link;

             (d)  the cage shall be provided with one padlock set, with GTE 
                  retaining one master key;

             (e)  one ac electrical outlet;

             (f)  one charger circuit system;

             (g)  one electrical sub-panel;

             (h)  such additional lighting as may be necessary;

             (i)  one fire detection requirement evaluation;

             (j)  grounding for the cage consistent with COEI.

      1.11.3 Modifications to the standard configuration set forth in Section
           1.11.2 can be made on an individual case basis.  If modifications
           are agreed upon and made by the Parties, GTE will work with DTI to
           implement such additional modifications as may be necessary to
           ensure that DTI's collocated space is protected from unauthorized
           access.

      1.11.4 At such time as construction of DTI's collocation space is
           approximately 50 percent completed, GTE will give DTI notification,
           and such notification shall include scheduled completion and
           turnover dates.

      1.11.5 Upon completion of construction of collocated space, GTE will
           conduct a walk through of the collocated space with DTI.  Should DTI
           note any deviations from the plan agreed upon by GTE and DTI at the
           customer meeting, and if such deviations were not requested by DTI
           or not required by law, GTE shall correct such deviations at its own
           expense within 5 Business Days.

1.12 Connection Equipment.  DTI may provision equipment for the connection of
     DTI termination equipment to GTE equipment using either of the following
     methods:

      1.12.1 DTI may extend an electrical or optical cable from the terminal
           within DTI's collocation cage and terminate that cable at GTE's
           network.

      1.12.2 DTI may install a patch panel within its collocation cage and then
           hand the cabling to GTE to extend to and have GTE terminate that
           cable at GTE's network.

1.13 Access to DTI Collocation Space.  The terms and conditions of access to
     DTI's collocation space shall be as set forth in applicable GTE state and
     federal EIS tariffs.  Additionally, GTE agrees that the following terms
     and conditions shall apply to access:

      1.13.1 GTE shall implement adequate measures to control access to
           collocation cages.

      1.13.2 Collocation space shall comply with all applicable fire and safety
           codes.

                                      IX-3


<PAGE>   73




      1.13.3 Doors with removable hinges or inadequate strength shall be
           monitored by an alarm connected to a manned site.  All other alarms
           monitoring DTI collocation space provided by GTE shall also be
           connected to a manned site.  DTI may, at its option, provide its own
           intrusion alarms for its collocated space.

      1.13.4 GTE shall control janitorial access to collocation cages, and
           restrict such access to approved and certified employees, agents or
           contractors.

      1.13.5 GTE shall establish procedures for access to collocation cages by
           GTE and non-GTE emergency personnel, and shall not allow access by
           security guards unless such access comports with this section and is
           otherwise allowed under applicable GTE state and federal EIS
           tariffs.

      1.13.6 GTE shall retain a master key to DTI's collocation space for use
           only in event of emergency as detailed in applicable GTE state and
           federal tariffs.  At DTI's option, the Parties shall review key
           control procedures no more frequently than once in any twelve month
           period.  At any time, DTI may elect to change keys if it suspects
           key control has been lost, provided, however, that GTE will be
           provided with a master key in accord with this section.

      1.13.7 Not more frequently than once a year, DTI may audit the security
           and access procedures and equipment applicable to its collocated
           space and the central office housing the collocation space.  Access
           by personnel necessary to conduct such an audit shall be limited as
           set forth in applicable GTE state and federal EIS tariffs.  Should
           DTI identify deficiencies in security and access procedures and
           equipment as a result of such audit, the cost, terms and conditions
           of the correction of such deficiencies shall be negotiated in good
           faith between the parties.

2.   Virtual Collocation.  Subject to Section 1 of this Article IX, GTE will
     provide virtual collocation for purposes of interconnection or access to
     unbundled network elements pursuant to the terms and conditions in the
     applicable GTE federal and state EIS tariffs.  In addition, GTE agrees
     that the terms and conditions set forth in this Section 2 of this Article
     IX, shall apply to virtual collocation provided to DTI.

2.1  Existing Virtual Collocation.  If, on the effective date of this
     Agreement, DTI is virtually collocated in a GTE premise, DTI may (I) elect
     to retain its virtual collocation arrangement in that premise or (ii)
     unless it is not practical for technical reasons or because of space
     limitations, convert its virtual collocation arrangement at that premise
     to physical collocation.  If DTI elects the latter option, DTI's request
     shall be treated as a new physical collocation request and DTI shall pay
     GTE at the applicable tariff rates for construction and rearrangement of
     DTI's equipment as well as all applicable tariffed physical collocation
     recurring charges.

2.2  Conversion from Physical to Virtual.  Unless it is not practical for
     technical reasons or because of space limitations, DTI may convert a
     physical collocation arrangement to a virtual collocation arrangement.
     DTI's request to do so shall be treated as a new virtual collocation
     request and DTI shall pay GTE at the applicable tariff rates for
     construction and rearrangement of DTI's equipment as well as all
     applicable tariffed virtual collocation recurring charges.  If DTI elects
     to change to a virtual collocation arrangement pursuant to this section,
     GTE will not refund previous payments for physical collocation received
     from DTI.

2.3  Vendors.  Choice of vendors for equipment used for virtual collocation
     shall be under the terms and conditions set forth in the applicable GTE
     federal and state EIS tariff.  Upon request by DTI,


                                      IX-4


<PAGE>   74




      GTE shall provide a list of locally qualified vendors approved for the
      type of equipment to be collocated.

2.4  Inspection.  Upon provision of virtual collocation by GTE, the Parties
     shall agree on a mutually acceptable schedule whereby DTI may inspect the
     equipment in its virtual collocation space.

                                      IX-5
<PAGE>   75




                               ARTICLE X

           ACCESS TO POLES, DUCTS, CONDUITS AND RIGHTS-OF-WAY

To the extent required by the Act, GTE and DTI shall each afford to the other
access to the poles, ducts, conduits and rights of way it owns or controls on
terms, conditions and prices comparable to those offered to any other entity
pursuant to each Parties tariffs and/or standard agreements.  Accordingly, GTE
and DTI shall execute pole attachment and conduit occupancy agreements in the
form set forth in Appendices I and J.

                                      X-1

<PAGE>   76




IN WITNESS WHEREOF, each Party has executed this Agreement to be effective as
of the date first above written.

<TABLE>
<S>                                                 <C>
GTE ARKANSAS INCORPORATED                           DIGITAL TELEPORT, INC.
GTE MIDWEST INCORPORATED 


By /s/  Connie Nicholas                             By /s/  J. W. Sheehy

Name  Connie E. Nicholas                            Name  J. W. Sheehy
      Assistant Vice President

Title Wholesale Markets - Interconnection            Title Vice President IC Support

Date November 7, 1997                               Date 10/22/97
</TABLE>

                                      X-2


<PAGE>   77




                               APPENDIX A

                     GTE PERFORMANCE MEASURES (PM)

Pursuant to Article III of this Agreement, the following terms and conditions
shall apply regarding the performance measures set forth in this Appendix A.
The Parties recognize that these performance measures are new and evolving, and
as further evolution is made by GTE, the parties will discuss the changed
procedures, including new standard processes and procedures, if any, for the
purpose of applying them to and incorporating them in this Agreement.

GTE'S PERFORMANCE MEASURES (PMS) as set forth in this Appendix implement
standards to measure the quality of services supplied by GTE with respect to
pre-ordering, order/provisioning, maintenance and billing that is equivalent in
equality to what GTE provides to itself.  GTE's PMs contain measures for both
GTE and DTI with the measures for DTI being considered an essential element for
GTE meeting customer expectations.

GTE's PMs are conditioned upon a 150 order per month minimum requirement as
described below for Service Units, as a threshold for providing Financial
Incentives for certain PMs.  The 150 order per month requirement for Service
Units was developed to provide a statistically valid sample size to measure
GTE's performance for DTI in relationship to the level of performance GTE
provides to its own customers.  Service Units are defined to include unbundled
loops, unbundled ports, resold local service lines, INP ported numbers, and
interconnection trunks.

GTE will begin recording of performance data in the first full month in which
it receives the first official order from DTI.  GTE's report of performance
measures to DTI, however, will begin after 6 months of data recording; i.e.,
for data recorded in the seventh full month.  Each month's report will then be
reported as a rolling 3-month result (i.e., July's report will actually include
May, June, July data).  The calculation of DTI performance will be based on
this 3 month rolling average of actual performance unless otherwise specified.

Reporting will be available monthly, or at a longer interval, as requested by
DTI.  The details of report delivery shall be agreed upon between DTI and the
appropriate GTE Account Management group.

FORECASTING PERFORMANCE MEASUREMENT - GTE's PMs are conditioned upon the
requirement, as described more fully below, that DTI submit timely and accurate
forecasts.  The Forecasting PM includes provisions that measure the accuracy of
DTI's forecast by comparing forecasted Service Units to ordered Service Units
for the same period.

DTI shall furnish a quarterly forecast of service order volumes and quantities
of resold local services, unbundled network elements, and interconnection
trunks on a State-wide basis, identifying these volumes/quantities by month,
for each month included in the quarter.  These forecasts shall be received by
GTE at least one month before the beginning of the quarter covered by the
forecast.  Should the first month of the next quarterly forecast be greater
than ten (10%) percent of the last month of the current quarterly forecast, DTI
shall notify GTE promptly of the increased order volume.  Notification shall be
made to the appropriate GTE Account Management group in order to allow
sufficient "lead time" to ensure staffing levels are available to support the
increased order volumes.

DTI must agree to comply with the requirements of the Forecasting PM as the
basis for the application of Financial Incentives described below.  If DTI
chooses not to comply with the Forecasting PM, Financial Incentives will not
apply.  For purposes of applying Financial Incentives the accuracy of forecasts
will be determined at the state level.

                                      A-1
<PAGE>   78



The measurement and reporting of GTE's PMs will still be made available as
stated above regardless of DTI's election for the Forecasting PM.

FINANCIAL INCENTIVES - When DTI agrees to the Forecasting PM described above,
Financial Incentives will begin concurrently with reporting of individual DTI
performance data except as specified below for the
Pre-Ordering/Ordering/Provisioning and Interconnection PMs.

Financial Incentives will apply to Maintenance/Repair PMs without restriction
other than DTI's participation in the Forecasting PM.

Financial Incentives will apply to Pre-Ordering/Ordering/Provisioning and
Interconnection PMs subject to DTI's participation in the Forecasting PM and
the required per month ordering threshold.  DTI must place a 150 orders per
month minimum for Service Units, by state, for three (3) consecutive months
(hereafter the "150-order requirement").  Once DTI's order volume reaches the
"150-order requirement", a ninety (90) day grace period will begin wherein data
will be accumulated and reviewed.  At the end of that ninety (90) day grace
period, applicable Financial Incentives shall apply.  The three (3) consecutive
months and the subsequent ninety (90) day grace period may be concurrent with
all or part of the beginning six (6) month period after recording of official
data begins, between initial order activity and the implementation of
performance reporting (i.e., month 7 data).

For purposes of applying Financial Incentives to the Forecasting PM, if DTI's
actual order activity for Service Units in a given month is below the forecast
for that month by more than 10%, Financial Incentives will apply only to the
incremental Service Units that were forecasted but not ordered; i.e., the
difference between the actual quantity ordered and the quantity which reflects
the forecast less 10%.

For purposes of applying Financial Incentives to the
Pre-ordering/Ordering/Provisioning and Interconnection PM, if DTI's actual
order activity for Service Units in a given month exceeds the forecast for that
month by more than 10%, Financial Incentives will not apply.

Average Non-Recurring Charges - The averages are calculated by dividing the sum
of all non-recurring charges applied to service orders issued by DTI to GTE by
the total number of orders or the total number of Service Units ordered.  These
calculations will be made by service activity and service category:  Business
(Single/Multi-line, Centranet, PBX, Trunks), Residence, etc..  The average
Non-Recurring Charges will be separately calculated for field work and
non-field work orders.  These averages and a weighting factor for field and
non-field work will be calculated during a study period to be mutually agreed
between the Parties.  The initial average Non-Recurring Charge calculation will
occur within three (3) months of DTI's initial issuance of official orders.
The average Non-Recurring Charge shall be recalculated annually as mutually
agreed between the Parties.

Average Recurring Charges - The averages are calculated by dividing the sum of
all recurring charges applied to service orders issued by DTI to GTE by the
total number of orders or Service Units ordered.  These averages will be
calculated during a study period to be mutually agreed between the Parties.
These calculations will be made by service activity and service category,
Business, Residence, etc.  The initial average Recurring Charge calculation
will occur within three (3) months of DTI's initial issuance of official
orders.  The average Recurring Charges shall be recalculated annually as
mutually agreed between the Parties.

                                      A-2

<PAGE>   79

           GTE PERFORMANCE MEASURES WITH FINANCIAL INCENTIVES


                   PRE-ORDERING/ORDERING/PROVISIONING

<TABLE>
<CAPTION>
                                   Performance           Quality               Financial
Issue No.  Obligation  Data Level  Measure(PM)           Standard              Incentive
<S>        <C>         <C>         <C>                   <C>                   <C>
1          GTE         National    Prompt transmission   85% of CSR's sent     5% of average NRC
                                   of Customer Service   to DTI by the close   incurred by DTI for
                                   Record (CSR)          of business on        the number of CSR's
                                   Information           business day          for which the
                                                         following receipt     Quality Standard is
                                                         of request            not met in the
                                                                               reported month

2          GTE         National    Prompt transmission   85% of LSC's sent     20% of average NRC
                                   of Local Service      to DTI by the close   incurred by DTI for
                                   Confirmation (LSC)    of business on        the lines ordered
                                                         business day          for which GTE
                                                         following receipt     failed to meet the
                                                         of request            Quality Standard in
                                                                               the reported month

3          GTE         State       Due Date              Percent of DTI        Waiver of the
                                   commitments met       customer install,     average NRC
                                                         transfer, and         installation
                                                         change service        charges for the
                                                         orders for which      number of lines by
                                                         service is            which GTE fails to
                                                         installed by close    meet the Quality
                                                         of business on the    Standard in the
                                                         committed due date    reported month
                                                         is not more than
                                                         2.5% below the
                                                         percent of GTE
                                                         customer install,
                                                         transfer, and
                                                         change service
                                                         orders
</TABLE>


                                      A-3
<PAGE>   80






<TABLE>
<CAPTION>
                                   Performance           Quality               Financial
Issue No.  Obligation  Data Level  Measure(PM)           Standard              Incentive
<S>        <C>         <C>         <C>                   <C>                   <C>
4          GTE         State       % reporting trouble   Percent of DTI        One month's average
                                   within 30 days of     customer install,     MRC per trouble
                                   the date installed    transfer, and         report exceeding
                                                         change service        the Quality
                                                         orders which are      Standard in the
                                                         followed by a         reported month (not
                                                         customer trouble      to exceed one
                                                         report within 30      month's credit per
                                                         days of service       customer line
                                                         order completion      month)
                                                         date is not more
                                                         than 2.5% worse
                                                         than the percent
                                                         GTE customer
                                                         install, transfer,
                                                         and change service
                                                         orders which are
                                                         followed by a
                                                         customer trouble
                                                         report within 30
                                                         days of service
                                                         order completion

5          GTE         State       Service Order         80% of LSR's          Payment by DTI to
                                   discrepancy:  LSR's   initiated by DTI's    GTE equal to 20% of
                                   issued without        do not contain an     the average NRC
                                   material errors       order discrepancy     installation
                                                         or error:  90% in     charges for the
                                                         12 months.  Final     number of lines
                                                         target - 95%          which DTI fails to
                                                                               meet the Quality
                                                                               Standard in the
                                                                               reported month
</TABLE>

                                      A-4
<PAGE>   81




                            INTERCONNECTION

<TABLE>
<CAPTION>
                                   Performance           Quality               Financial
Issue No.  Obligation  Data Level  Measure(PM)           Standard              Incentive
<S>        <C>         <C>         <C>                   <C>                   <C>
1          GTE         State       Trunk orders          Percent of trunk      Waiver of 100% of
                                   completed on or       orders by DTI         average NRC for
                                   before the            completed by GTE on   trunks ordered for
                                   Committed Due Date    or before the         which GTE failed to
                                                         commitment date is    meet the Quality
                                                         not more than 10%     Standard in the
                                                         below the percent     reported month
                                                         of FG B/D Switched
                                                         access orders by
                                                         all ordering
                                                         companies completed
                                                         by GTE on or before
                                                         the commitment date

2          GTE         National    Firm Order            Percent of trunk      Waiver of 20%
                                   Confirmation (FOC)    orders by DTI         average of average
                                   on time delivery      completed by GTE on   NRC installation
                                                         or before the         for trunks for
                                                         commitment date is    which GTE failed to
                                                         not more than 5%      meet the Quality
                                                         below the percent     Standard in the
                                                         of FG B/D Switched    reported month
                                                         access by all
                                                         ordering companies
                                                         for which GTE sends
                                                         FOC (within 5 days,
                                                         or longer, as
                                                         requested by DTI)
</TABLE>

                                      A-5

<PAGE>   82






<TABLE>
<CAPTION>
                                   Performance           Quality               Financial
Issue No.  Obligation  Data Level  Measure(PM)           Standard              Incentive
<S>        <C>         <C>         <C>                   <C>                   <C>
3          DTI         National    Service Order         80% of ASR's          Charge equal to 20%
                                   discrepancy:  ASR's   initiated by DTI do   of average NRC
                                   issued without        not contain           installation of
                                   material errors       material error or     trunks ordered for
                                                         result in             which DTI failed to
                                                         discrepancy; 90% in   meet the Quality
                                                         12 months.  Final     Standard in the
                                                         target 95%            reported month
</TABLE>


                                      A-6

<PAGE>   83




                           MAINTENANCE/REPAIR

<TABLE>
<CAPTION>
                                   Performance           Quality               Financial
Issue No.  Obligation  Data Level  Measure(PM)           Standard              Incentive
<S>        <C>         <C>         <C>                   <C>                   <C>
1          GTE         State       Percent Commitments   Percent of DTI        One month's flat
                                   Met                   customer Network      rate average MRC
                                                         trouble reports       per line out of
                                                         where commitment      service for which
                                                         was meet more than    Quality Standard is
                                                         2.5% worse than the   not met in the
                                                         percent of GTE's      reported month
                                                         customer Network
                                                         trouble reports
                                                         where commitment
                                                         was met (excluding
                                                         reports which are
                                                         cleared CPE, DTI
                                                         customer error)
</TABLE>


                                      A-7
<PAGE>   84






<TABLE>
<CAPTION>
                                   Performance           Quality               Financial
Issue No.  Obligation  Data Level  Measure(PM)           Standard              Incentive
<S>        <C>         <C>         <C>                   <C>                   <C>
2          GTE         State       Average clearing      Average repair time   One month's flat
                                   time - Out of         (total number of      rate average MRC
                                   Service (OOS) -       elapsed hours/        per line OOS for
                                   Designed              minutes for OOS DTI   which Quality
                                                         customer Network      Standard is not met
                                                         trouble reports       in the reported
                                                         divided by total      month
                                                         number OOS customer
                                                         Network trouble
                                                         reports) for DTI
                                                         customers is more
                                                         than 10% of the
                                                         average repair time
                                                         for GTE customers
                                                         (includes only
                                                         "Designed"
                                                         services)
</TABLE>


                                      A-8

<PAGE>   85






<TABLE>
<CAPTION>
                                   Performance           Quality               Financial
Issue No.  Obligation  Data Level  Measure(PM)           Standard              Incentive
<S>        <C>         <C>         <C>                   <C>                   <C>
3          GTE         State       Average clearing      Average repair time   One month's flat
                                   time - Out of         (total number of      rate average MRC
                                   Service (OOS) -       elapsed               per line OOS for
                                   Non-Designed          hours/minutes for     which Quality
                                                         OOS DTI customer      Standard is not met
                                                         Network trouble       in the reported
                                                         reports divided by    month
                                                         total number OOS
                                                         customer Network
                                                         trouble reports)
                                                         for DTI customers
                                                         is more than 10% of
                                                         the average repair
                                                         time for GTE
                                                         customers (includes
                                                         only POTS and
                                                         circuits which do
                                                         not require a
                                                         design)

4          GTE         State       Percent reports per   Percent of DTI        Within six (6)
                                   100 (Failure          customers making      months of effective
                                   Frequency)            trouble reports       date, GTE will have
                                                         (total number of      established a
                                                         DTI customer          minimum access line
                                                         Network trouble       threshold.
                                                         reports divided by    One month's flat
                                                         the total access      rate average MRC
                                                         lines multiplied by   per line OOS for
                                                         100) is not worse     which Quality
                                                         than .5 percent       Standard is not met
                                                         points of the         in the reported
                                                         percentage of GTE     month.
                                                         customers making
                                                         trouble reports
</TABLE>


                                      A-9

<PAGE>   86






<TABLE>
<CAPTION>
                                   Performance           Quality               Financial
Issue No.  Obligation  Data Level  Measure(PM)           Standard              Incentive
<S>        <C>         <C>         <C>                   <C>                   <C>
5          GTE         State       Percent repeat        Percent of DTI        One month's flat
                                   reports in 30 days    customer repeat       rate average MRC
                                                         trouble reports       per line OOS for
                                                         (total number of      which Quality
                                                         DTI customer          Standard is not met
                                                         Network trouble       in the reported
                                                         reports which had a   month
                                                         previous Network
                                                         trouble report
                                                         within the last 30
                                                         days divided by the
                                                         total of customer
                                                         Network trouble
                                                         reports multiplied
                                                         by 100) is not more
                                                         than 2.5% worse
                                                         than the percent of
                                                         GTE customer repeat
                                                         trouble reports
</TABLE>

**Note:  Outage Credits:  Local Service and Unbundled Network Elements:  Outage
Credits apply to interruptions of Local Services and Unbundled Network Elements
in accordance with applicable state Public Service Commission requirements.  If
a Local Service or Unbundled Network Element is interrupted, DTI will be
entitled to outage credits.  An interruption period begins when DTI reports to
GTE that a Local Service or Unbundled Network Element is interrupted (or GTE
has knowledge that an interruption has occurred through service monitoring or
other means).  An interruption period ends when the Local Service is repaired
and returned to DTI.  A Local Service or Unbundled Network Element is
considered to be interrupted when there has been a loss of continuity, the
Local Service or Unbundled Network Element does not operate in accordance with
the applicable service standards, or it is otherwise unavailable for use by
DTI.  This definition is not intended to conflict with State Public Utility
Commission requirements.

                                      A-10

<PAGE>   87




                              FORECASTING

<TABLE>
<CAPTION>
                                  PERFORMANCE           QUALITY               FINANCIAL
ISSUE NO.  OBLIGATION  DATALEVEL  MEASUREMENT(PM)       STANDARD              INCENTIVE
- ---------  ----------  ---------  -------------------   -------------------   -------------------
<S>        <C>         <C>        <C>                   <C>                   <C>
1          DTI         State      Service Units         Volume of DTI's       20% of the average
                                  requirements          Service Units         NRC for the number
                                  accurately forecast   requirements in a     of service units
                                  all volumes for       month is not          below the forecast
                                  each month            greater than 10%      when the actual
                                  contained in the      below the amount      volumes are greater
                                  quarterly report.     forecast by DTI in    than 10% and less
                                                        it's most recent      than or equal to
                                                        quarterly forecast    30% under forecast.
                                                        (which shall have      40% of the average
                                                        been made not later   NRC for the number
                                                        than 30 days prior    of service units
                                                        to the quarter in     below the forecast
                                                        question)             when the actual
                                                                              volumes are greater
                                                                              than 30% and less
                                                                              than or equal to
                                                                              40% under the
                                                                              forecast.  50% of
                                                                              the average NRC for
                                                                              the number of
                                                                              service units below
                                                                              the forecast when
                                                                              the actual volumes
                                                                              are over 40% under
                                                                              the forecast
</TABLE>

                                      A-11

<PAGE>   88




                                   APPENDIX B

                                 SERVICE MATRIX

Date 
     --------------------

<TABLE>
<CAPTION>
     Service Location
(identified by tandem serving                   IP                    Services
         area)                      (identified by CLLI code)     (identified by        )
- -----------------------------       -------------------------     -----------------------
<S>                                 <C>                           <C>
TO BE DETERMINED                    TO BE DETERMINED              TO BE DETERMINED
</TABLE>



                                      B-1
<PAGE>   89
                 GTE TELEPHONE OPERATIONS HEADQUARTERS
             RESALE PRODUCTS & SERVICES - STATE OF MISSOURI

<TABLE>
<CAPTION>
                                                                        Billing    Resale   Discount   Retail   Avoided   Resale
ST  CO    TAR SEC    Rule       Service Description                      Type     Position  Position    Rate      Cost      Rate
<S>  <C>  <C>       <C>     <C>                                          <C>        <C>       <C>        <C>      <C>       <C>
                            GENERAL AND LOCAL EXCHANGE SERVICE -
                                PSC MO. NO. 1 LOCAL EXCHANGE SERVICE
                                Business Service
                                GRP A-1
MO   GTE  4-SHT.17   8          1-Party                                  MRC        Yes       Yes        $13.00   $1.99     $11.01
MO   GTE  4-SHT.17   8          4-Party                                  MRC        Yes       Yes        $13.00   $1.99     $11.01
MO   GTE  4-SHT.17   8          PBX Trunk                                MRC        Yes       Yes        $16.25   $2.49     $13.76
MO   GTE  4-SHT.17   8          Key Line                                 MRC        Yes       Yes        $16.25   $2.49     $13.76
MO   GTE  4-SHT.17   0          Semi-Public                              MRC        No        No         $16.25    N/A      N/A
MO   GTE  4-SHT.17   0          COPT                                     MRC        Yes       No         $26.95    N/A      $26.95
                                GRP A-2
MO   GTE  4-SHT.17   8          1-Party                                  MRC        Yes       Yes        $14.00   $2.15     $11.85
MO   GTE  4-SHT.17   8          4-Party                                  MRC        Yes       Yes        $14.00   $2.15     $11.85
MO   GTE  4-SHT.17   8          PBX Trunk                                MRC        Yes       Yes        $17.50   $2.68     $14.82
MO   GTE  4-SHT.17   8          Key Line                                 MRC        Yes       Yes        $17.50   $2.68     $14.82
MO   GTE  4-SHT.17   0          Semi-Public                              MRC        No        No         $17.50   N/A       N/A
MO   GTE  4-SHT.17   0          COPT                                     MRC        Yes       No         $26.95   N/A       $26.95
                                GRP A-3
MO   GTE  4-SHT.17   8          1-Party                                  MRC        Yes       Yes        $15.00   $2.30     $12.70
MO   GTE  4-SHT.17   8          4-Party                                  MRC        Yes       Yes        $15.00   $2.30     $12.70
MO   GTE  4-SHT.17   8          PBX Trunk                                MRC        Yes       Yes        $18.75   $2.87     $15.88
MO   GTE  4-SHT.17   8          Key Line                                 MRC        Yes       Yes        $18.75   $2.87     $15.88
MO   GTE  4-SHT.17   0          Semi-Public                              MRC        No        No         $18.75   N/A       N/A
MO   GTE  4-SHT.17   0          COPT                                     MRC        Yes       No         $26.95   N/A       $26.95
                                GRP A-4
MO   GTE  4-SHT.17   8          1-Party                                  MRC        Yes       Yes        $16.00   $2.45     $13.55
MO   GTE  4-SHT.17   8          4-Party                                  MRC        Yes       Yes        $16.00   $2.45     $13.55
MO   GTE  4-SHT.17   8          PBX Trunk                                MRC        Yes       Yes        $20.00   $3.07     $16.93
MO   GTE  4-SHT.17   8          Key Line                                 MRC        Yes       Yes        $20.00   $3.07     $16.93
MO   GTE  4-SHT.17   0          Semi-Public                              MRC        No        No         $20.00   N/A       N/A
MO   GTE  4-SHT.17   0          COPT                                     MRC        Yes       No         $26.95   N/A       $26.95
                                GRP A-5
MO   GTE  4-SHT.17   8          1-Party                                  MRC        Yes       Yes        $17.00   $2.61     $14.39
MO   GTE  4-SHT.17   8          4-Party                                  MRC        Yes       Yes        $17.00   $2.61     $14.39
MO   GTE  4-SHT.17   8          PBX Trunk                                MRC        Yes       Yes        $21.25   $3.26     $17.99
MO   GTE  4-SHT.17   8          Key Line                                 MRC        Yes       Yes        $21.25   $3.26     $17.99
MO   GTE  4-SHT.17   0          Semi-Public                              MRC        No        No         $21.25   N/A       N/A
MO   GTE  4-SHT.17   0          COPT                                     MRC        Yes       No         $26.95   N/A       $26.95
                                GRP Metro
MO   GTE  4-SHT.18   8          1-Party                                  MRC        Yes       Yes        $20.22   $3.10     $17.12
MO   GTE  4-SHT.18   8          PBX Trunk                                MRC        Yes       Yes        $31.67   $4.86     $26.81
</TABLE>

                                 Page 1

<PAGE>   90



                 GTE TELEPHONE OPERATIONS HEADQUARTERS
             RESALE PRODUCTS & SERVICES - STATE OF MISSOURI


<TABLE>
<CAPTION>
                                                              Billing    Resale      Discount   Retail   Avoided      Resale
ST  CO    TAR SEC    Rule       Service Description            Type     Position     Position    Rate      Cost         Rate
<S>  <C>  <C>       <C>     <C>                                 <C>     <C>             <C>     <C>      <C>            <C>
MO   GTE  4-SHT.18   8      Key Line                            MRC     Yes             Yes     $31.67   $4.86          $26.81
MO   GTE  4-SHT.18   0      Semi-Public                         MRC     No              No      $31.67   N/A            N/A
MO   GTE  4-SHT.18   0      COPT                                MRC     Yes             No      $26.95   N/A            $26.95
                            Residence Service
                            GRP A-1
MO   GTE  4-SHT.17   0      1-Party                             MRC     No              No      $6.50    N/A            N/A
MO   GTE  4-SHT.17   0      2-Party                             MRC     No              No      $5.20    N/A            N/A
MO   GTE  4-SHT.17   0      4-Party                             MRC     No              No      $4.23    N/A            N/A
MO   GTE  4-SHT.17   0      Key Line                            MRC     No              No      $6.50    N/A            N/A
                            GRP A-2                                                                      N/A
MO   GTE  4-SHT.17   0      1-Party                             MRC     No              No      $7.00    N/A            N/A
MO   GTE  4-SHT.17   0      2-Party                             MRC     No              No      $5.60    N/A            N/A
MO   GTE  4-SHT.17   0      4-Party                             MRC     No              No      $4.55    N/A            N/A
MO   GTE  4-SHT.17   0      Key Line                            MRC     No              No      $7.00    N/A            N/A
                            GRP A-3                                                                      N/A
MO   GTE  4-SHT.17   0      1-Party                             MRC     No              No      $7.50    N/A            N/A
MO   GTE  4-SHT.17   0      2-Party                             MRC     No              No      $6.00    N/A            N/A
MO   GTE  4-SHT.17   0      4-Party                             MRC     No              No      $4.88    N/A            N/A
MO   GTE  4-SHT.17   0      Key Line                            MRC     No              No      $7.50    N/A            N/A
                            GRP A-4                                                                      N/A
MO   GTE  4-SHT.17   0      1-Party                             MRC     No              No      $8.00    N/A            N/A
MO   GTE  4-SHT.17   0      2-Party                             MRC     No              No      $6.40    N/A            N/A
MO   GTE  4-SHT.17   0      4-Party                             MRC     No              No      $5.20    N/A            N/A
MO   GTE  4-SHT.17   0      Key Line                            MRC     No              No      $8.00    N/A            N/A
                            GRP A-5                                                                      N/A
MO   GTE  4-SHT.17   0      1-Party                             MRC     No              No      $8.50    N/A            N/A
MO   GTE  4-SHT.17   0      2-Party                             MRC     No              No      $6.80    N/A            N/A
MO   GTE  4-SHT.17   0      4-Party                             MRC     No              No      $5.53    N/A            N/A
MO   GTE  4-SHT.17   0      Key Line                            MRC     No              No      $8.50    N/A            N/A
                            GRP Metro                                                                    N/A
MO   GTE  4-SHT.18   0      1-Party                             MRC     No              No      $10.40   N/A            N/A
                         EXTENDED AREA SERVICE
MO   GTE  4-SHT.6    0      Business Rate - High                MRC     Yes             Yes     $10.55   $0.00          $10.55
MO   GTE  4-SHT.6    0      Business Rate - Low                 MRC     Yes             Yes     $0.10    $0.00          $0.10
MO   GTE  4-SHT.6    0      Residence Rate - High               MRC     No              No      $5.70    N/A            N/A
MO   GTE  4-SHT.6    0      Residence Rate - Low                MRC     No              No      $0.10    N/A            N/A
                         METROPOLITAN CALLING AREA (MCA) PLAN
                            Springfield MCA-2
MO   GTE  4-SHT.31   8      Bus                                 MRC     Yes             Yes     $21.75   $3.33          $18.42
MO   GTE  4-SHT.31   0      Res                                 MRC     No              No      $11.45   N/A            N/A
</TABLE>

                                 Page 2



<PAGE>   91

                 GTE TELEPHONE OPERATIONS HEADQUARTERS
             RESALE PRODUCTS & SERVICES - STATE OF MISSOURI




<TABLE>
<CAPTION>
                                                                         Billing    Resale   Discount   Retail   Avoided   Resale
ST  CO    TAR SEC    Rule       Service Description                       Type     Position  Position    Rate      Cost      Rate
<S>  <C>  <C>       <C>     <C>                                           <C>        <C>       <C>        <C>      <C>       <C>
                                       St. Louis/Kansas City MCA - 4
MO   GTE  4-SHT.31   8                 Bus                                MRC        Yes       Yes        $46.75   $7.17     $39.58
MO   GTE  4-SHT.31   0                 Res                                MRC        No        No         $21.55   N/A       N/A
                                       St. Louis/Kansas City MCA - 5
MO   GTE  4-SHT.31   8                 Bus                                MRC        Yes       Yes        $70.70   $10.84    $59.86
MO   GTE  4-SHT.31   0                 Res                                MRC        No        No         $32.50   N/A       N/A
                            SERVICE CHARGES
                                       Service Ordering Charge
                                       Initial Ordering Charge
MO   GTE  5-SHT.4    0                 Bus                                NRC        No        No         $25.00   N/A       N/A
MO   GTE  5-SHT.4    0                 Res                                NRC        No        No         $13.00   N/A       N/A
                                       Subsequent Ordering Charge                                                  N/A
MO   GTE  5-SHT.4    0                 Bus                                NRC        No        No         $9.00    N/A       N/A
MO   GTE  5-SHT.4    0                 Res                                NRC        No        No         $4.00    N/A       N/A
                                       Line Connection Charge                                                      N/A
MO   GTE  5-SHT.4    0                 Bus                                NRC        Yes       No         $14.00   N/A       $14.00
MO   GTE  5-SHT.4    0                 Res                                NRC        Yes       No         $7.60    N/A       $7.60
MO   GTE  5-SHT.4    0                 Semi-Public Telephone
                                       installation Charge                NRC        No        No         $100.00  N/A       N/A
                                       Restoral Charge                                                             N/A
MO   GTE  5-SHT.4    0                 Bus                                NRC        No        No         $23.00   N/A       N/A
MO   GTE  5-SHT.4    0                 Res                                NRC        No        No         $11.60   N/A       N/A
                                       Maintenance  of Service Charge                                              N/A
MO   GTE  5-SHT.4    0                 Bus                                NRC        No        No         $25.00   N/A       N/A
MO   GTE  5-SHT.4    0                 Res                                NRC        No        No         $25.00   N/A       N/A
                            CUSTOM CALLING SERVICES
                                       Remote Call Forwarding Service
MO   GTE  6-SHT.2    8                 Bus                                MRC        Yes       Yes        $16.00   $2.45     $13.55
MO   GTE  6-SHT.2    8                 Res                                MRC        Yes       Yes        $16.00   $2.45     $13.55
                                       SmartCall Services
                                       Anonymous Call Rejection
MO   GTE  6-SHT.13   8                 Bus                                MRC        Yes       Yes        $1.00    N/A       $1.00
MO   GTE  6-SHT.13   8                 Res                                MRC        Yes       Yes        $1.00    $0.15     $0.85
                                       Automatic Busy Redial
MO   GTE  6-SHT.13   8                 Bus                                MRC        Yes       Yes        $6.00    $0.92     $5.08
MO   GTE  6-SHT.13   8                 Res                                MRC        Yes       Yes        $5.00    $0.77     $4.23
                                       Automatic Call Return
MO   GTE  6-SHT.13   8                 Bus                                MRC        Yes       Yes        $6.00    $0.92     $5.08
MO   GTE  6-SHT.13   8                 Res                                MRC        Yes       Yes        $5.00    $0.77     $4.23
</TABLE>
                                 Page 3

<PAGE>   92

                 GTE TELEPHONE OPERATIONS HEADQUARTERS
             RESALE PRODUCTS & SERVICES - STATE OF MISSOURI




<TABLE>
<CAPTION>
                                                                     Billing    Resale      Discount  Retail   Avoided       Resale
ST  CO    TAR SEC    Rule       Service Description                   Type     Position     Position  Rate      Cost          Rate
<S>  <C>  <C>       <C>     <C>                                       <C>     <C>             <C>     <C>     <C>             <C>
                         Call Block
MO   GTE  6-SHT.13   8   Bus                                          MRC     Yes             Yes     $4.00   $0.61           $3.39
MO   GTE  6-SHT.13   8   Res                                          MRC     Yes             Yes     $3.00   $0.46           $2.54
                         Call Forwarding
MO   GTE  6-SHT.13   8   Bus                                          MRC     Yes             Yes     $2.75   $0.42           $2.33
MO   GTE  6-SHT.13   8   Res                                          MRC     Yes             Yes     $2.30   $0.35           $1.95
                         Call Forwarding Busy Line - Fixed
MO   GTE  6-SHT.13   8   Bus                                          MRC     Yes             Yes     $1.25   $0.19           $1.06
MO   GTE  6-SHT.13   8   Res                                          MRC     Yes             Yes     $1.25   $0.19           $1.06
                         Call Forwarding No Answer - Fixed
MO   GTE  6-SHT.13   8   Bus                                          MRC     Yes             Yes     $1.25   $0.19           $1.06
MO   GTE  6-SHT.13   8   Res                                          MRC     Yes             Yes     $1.25   $0.19           $1.06
                         Call Forwarding Busy Line/No Answer -
                         Fixed
MO   GTE  6-SHT.14   8   Bus                                          MRC     Yes             Yes     $1.50   $0.23           $1.27
MO   GTE  6-SHT.14   8   Res                                          MRC     Yes             Yes     $1.50   $0.23           $1.27
                         Call Forwarding Busy Line/No Answer -
                         Variable
MO   GTE  6-SHT.14   8   Bus                                          MRC     Yes             Yes     $3.00   $0.46           $2.54
MO   GTE  6-SHT.14   8   Res                                          MRC     Yes             Yes     $3.00   $0.46           $2.54
                         Call Tracing Service
MO   GTE  6-SHT.14   8   Bus                                          MRC     Yes             Yes     $3.50   $0.54           $2.96
MO   GTE  6-SHT.14   8   Res                                          MRC     Yes             Yes     $2.50   $0.38           $2.12
                         Call Waiting
MO   GTE  6-SHT.14   8   Bus                                          MRC     Yes             Yes     $3.75   $0.57           $3.18
MO   GTE  6-SHT.14   8   Res                                          MRC     Yes             Yes     $3.30   $0.51           $2.79
                         Caller ID - Number
MO   GTE  6-SHT.14   8   Bus                                          MRC     Yes             Yes     $10.00  $1.53           $8.47
MO   GTE  6-SHT.14   8   Res                                          MRC     Yes             Yes     $7.00   $1.07           $5.93
                         Caller ID - Name and Number
MO   GTE  6-SHT.14   8   Bus                                          MRC     Yes             Yes     $11.50  $1.76           $9.74
MO   GTE  6-SHT.14   8   Res                                          MRC     Yes             Yes     $7.95   $1.22           $6.73
                         Smart Ring
MO   GTE  6-SHT.15   8   Bus                                          MRC     Yes             Yes     $6.00   $0.92           $5.08
MO   GTE  6-SHT.15   8   Res                                          MRC     Yes             Yes     $6.00   $0.92           $5.08
                         Smart Ring with any PAK
MO   GTE  6-SHT.15   8   Bus                                          MRC     Yes             Yes     $3.00   $0.46           $2.54
                         Special Call Acceptance
MO   GTE  6-SHT.15   8   Bus                                          MRC     Yes             Yes     $3.00   $0.46           $2.54
MO   GTE  6-SHT.15   8   Res                                          MRC     Yes             Yes     $2.00   $0.31           $1.69
                         Special Call Forwarding
MO   GTE  6-SHT.15   8   Bus                                          MRC     Yes             Yes     $3.00   $0.46           $2.54
MO   GTE  6-SHT.15   8   Res                                          MRC     Yes             Yes     $2.00   $0.31           $1.69
                         Speed Calling
                         8 Numbers
</TABLE>

                                 Page 4

<PAGE>   93

                 GTE TELEPHONE OPERATIONS HEADQUARTERS
             RESALE PRODUCTS & SERVICES - STATE OF MISSOURI

<TABLE>
<CAPTION>
                                                                           Billing    Resale   Discount   Retail   Avoided   Resale
ST  CO    TAR SEC    Rule       Service Description                          Type     Position  Position    Rate    Cost      Rate
<S>  <C>  <C>       <C>     <C>                                              <C>           <C>  <C>        <C>    <C>       <C>
MO   GTE  6-SHT.16   8                      Bus                              MRC           Yes  Yes      $3.50    $0.54      $2.96
MO   GTE  6-SHT.16   8                      Res                              MRC           Yes  Yes      $2.50    $0.38      $2.12
                                            30 Numbers
MO   GTE  6-SHT.16   8                      Bus                              MRC           Yes  Yes      $4.50    $0.69      $3.81
MO   GTE  6-SHT.16   8                      Res                              MRC           Yes  Yes      $3.50    $0.54      $2.96
                                            Three-Way Calling
MO   GTE  6-SHT.16   8                      Bus                              MRC           Yes  Yes      $3.75    $0.57      $3.18
MO   GTE  6-SHT.16   8                      Res                              MRC           Yes  Yes      $3.30    $0.51      $2.79
                                            VIP Alert
MO   GTE  6-SHT.16   8                      Bus                              MRC           Yes  Yes      $4.00    $0.61      $3.39
MO   GTE  6-SHT.16   8                      Res                              MRC           Yes  Yes      $3.00    $0.46      $2.54
                                            Smarter Call PAK
MO   GTE  6-SHT.17   8                      Bus                              MRC           Yes  Yes      $5.50    $0.84      $4.66
                                            SmartCall Pak 4400
MO   GTE  6-SHT.17   8                      Res Only                         MRC           Yes  Yes      $8.75    $1.34      $7.41
                                            SmartCall PAK 4900
MO   GTE  6-SHT.17   8                      Res Only                         MRC           Yes  Yes     $13.25    $2.03     $11.22
                            CONTROLINK DIGITAL CHANNEL SERVICE
MO   GTE  7-SHT.14   0                      Service Establishment Charge     NRC           Yes  No     $300.00    N/A      $300.00
MO   GTE  7-SHT.14   0                      Service Change Charge            NRC           Yes  No     $100.00    N/A      $100.00
                                            Digital Channel Capacity -
                                            36 Month Contract
MO   GTE  7-SHT.15   8                      24 Channels                      MRC           Yes  Yes    $340.00   $52.12    $287.88
MO   GTE  7-SHT.15   0                      NRC                              NRC           Yes  No     $250.00    N/A      $250.00
MO   GTE  7-SHT.15   8                      48 Channels                      MRC           Yes  Yes    $520.00   $79.72    $440.28
MO   GTE  7-SHT.15   0                      NRC                              NRC           Yes  No     $500.00    N/A      $500.00
MO   GTE  7-SHT.15   8                      72 Channels                      MRC           Yes  Yes    $700.00  $107.31    $592.69
MO   GTE  7-SHT.15   0                      NRC                              NRC           Yes  No     $750.00    N/A      $750.00
MO   GTE  7-SHT.15   8                      96 Channels                      MRC           Yes  Yes    $880.00  $134.90    $745.10
MO   GTE  7-SHT.15   0                      NRC                              NRC           Yes  No   $1,000.00    N/A    $1,000.00
MO   GTE  7-SHT.15   8                      120 Channels                     MRC           Yes  Yes  $1,060.00  $162.50    $897.50
MO   GTE  7-SHT.15   0                      NRC                              NRC           Yes  No   $1,250.00    N/A    $1,250.00
MO   GTE  7-SHT.15   8                      144 Channels                     MRC           Yes  Yes  $1,240.00  $190.09  $1,049.91
MO   GTE  7-SHT.15   0                      NRC                              NRC           Yes  No   $1,500.00    N/A    $1,500.00
MO   GTE  7-SHT.15   8                      192 Channels                     MRC           Yes  Yes  $1,600.00  $245.28  $1,354.72
MO   GTE  7-SHT.15   0                      NRC                              NRC           Yes  No   $2,000.00    N/A    $2,000.00
MO   GTE  7-SHT.15   8                      240 Channels                     MRC           Yes  Yes  $1,960.00  $300.47  $1,659.53
MO   GTE  7-SHT.15   0                      NRC                              NRC           Yes  No   $2,500.00    N/A    $2,500.00
MO   GTE  7-SHT.15   8                      288 Channels                     MRC           Yes  Yes  $2,320.00  $355.66  $1,964.34
MO   GTE  7-SHT.15   0                      NRC                              NRC           Yes  No   $3,000.00    N/A    $3,000.00
MO   GTE  7-SHT.15   8                      384 Channels                     MRC           Yes  Yes  $3,040.00  $466.03  $2,573.97
MO   GTE  7-SHT.15   0                      NRC                              NRC           Yes  No   $4,000.00    N/A    $4,000.00
</TABLE>


                                 Page 5
<PAGE>   94

                 GTE TELEPHONE OPERATIONS HEADQUARTERS
             RESALE PRODUCTS & SERVICES - STATE OF MISSOURI




<TABLE>
<CAPTION>
                                                             Billing    Resale   Discount   Retail        Avoided     Resale
ST  CO    TAR SEC    Rule       Service Description            Type     Position  Position    Rate          Cost       Rate
<S>  <C>  <C>       <C>  <C>                                  <C>      <C>             <C>     <C>          <C>         <C>
MO   GTE  7-SHT.15   8   480 Channels                         MRC      Yes             Yes     $3,760.00    $576.41     $3,183.59
MO   GTE  7-SHT.15   0   NRC                                  NRC      Yes             No      $5,000.00     N/A        $5,000.00
MO   GTE  7-SHT.15   8   576 Channels                         MRC      Yes             Yes     $4,480.00    $686.78     $3,793.22
MO   GTE  7-SHT.15   0   NRC                                  NRC      Yes             No      $6,000.00     N/A        $6,000.00
MO   GTE  7-SHT.15   8   672 Channels                         MRC      Yes             Yes     $5,200.00    $797.16     $4,402.84
MO   GTE  7-SHT.15   0   NRC                                  NRC      Yes             No      $7,000.00     N/A        $7,000.00
MO   GTE  7-SHT.15   8   1344 Channels                        MRC      Yes             Yes     $10,240.00   $1,569.79   $8,670.21
MO   GTE  7-SHT.15   0   NRC                                  NRC      Yes             No      $14,000.00     N/A       $14,000.00
MO   GTE  7-SHT.15   8   2016 Channels                        MRC      Yes             Yes     $15,280.00   $2,342.42   $12,937.58
MO   GTE  7-SHT.15   0   NRC                                  NRC      Yes             No      $21,000.00     N/A       $21,000.00
                         Digital Channel Capacity -
                         60 Month Contract
MO   GTE  7-SHT.16   8   24 Channels                          MRC      Yes             Yes     $320.00      $49.06      $270.94
MO   GTE  7-SHT.16   0   NRC                                  NRC      Yes             No      $250.00        N/A       $250.00
MO   GTE  7-SHT.16   8   48 Channels                          MRC      Yes             Yes     $490.00      $75.12     $414.88
MO   GTE  7-SHT.16   0   NRC                                  NRC      Yes             No      $500.00      N/A        $500.00
MO   GTE  7-SHT.16   8   72 Channels                          MRC      Yes             Yes     $660.00      $101.18     $558.82
MO   GTE  7-SHT.16   0   NRC                                  NRC      Yes             No      $750.00       N/A        $750.00
MO   GTE  7-SHT.16   8   96 Channels                          MRC      Yes             Yes     $830.00      $127.24     $702.76
MO   GTE  7-SHT.16   0   NRC                                  NRC      Yes             No    $1,000.00         N/A      $1,000.00
MO   GTE  7-SHT.16   8   120 Channels                         MRC      Yes             Yes   $1,000.00      $153.30     $846.70
MO   GTE  7-SHT.16   0   NRC                                  NRC      Yes             No    $1,250.00         N/A      $1,250.00
MO   GTE  7-SHT.16   8   144 Channels                         MRC      Yes             Yes   $1,170.00      $179.36     $990.64
MO   GTE  7-SHT.16   0   NRC                                  NRC      Yes             No    $1,500.00         N/A      $1,500.00
MO   GTE  7-SHT.16   8   192 Channels                         MRC      Yes             Yes   $1,510.00      $231.48     $1,278.52
MO   GTE  7-SHT.16   0   NRC                                  NRC      Yes             No    $2,000.00         N/A      $2,000.00
MO   GTE  7-SHT.16   8   240 Channels                         MRC      Yes             Yes   $1,850.00      $283.61     $1,566.40
MO   GTE  7-SHT.16   0   NRC                                  NRC      Yes             No    $2,500.00         N/A      $2,500.00
MO   GTE  7-SHT.16   8   288 Channels                         MRC      Yes             Yes   $2,190.00      $335.73     $1,854.27
MO   GTE  7-SHT.16   0   NRC                                  NRC      Yes             No    $3,000.00         N/A      $3,000.00
MO   GTE  7-SHT.16   8   384 Channels                         MRC      Yes             Yes   $2,870.00      $439.97     $2,430.03
MO   GTE  7-SHT.16   0   NRC                                  NRC      Yes             No    $4,000.00         N/A      $4,000.00
MO   GTE  7-SHT.16   8   480 Channels                         MRC      Yes             Yes   $3,550.00      $544.22     $3,005.79
MO   GTE  7-SHT.16   0   NRC                                  NRC      Yes             No    $5,000.00         N/A      $5,000.00
MO   GTE  7-SHT.16   8   576 Channels                         MRC      Yes             Yes   $4,230.00      $648.46     $3,581.54
MO   GTE  7-SHT.16   0   NRC                                  NRC      Yes             No    $6,000.00         N/A      $6,000.00
MO   GTE  7-SHT.16   8   672 Channels                         MRC      Yes             Yes   $4,910.00      $752.70     $4,157.30
MO   GTE  7-SHT.16   0   NRC                                  NRC      Yes             No    $7,000.00         N/A      $7,000.00
MO   GTE  7-SHT.16   8   1344 Channels                        MRC      Yes             Yes   $9,670.00      $1,482.41   $8,187.59
MO   GTE  7-SHT.16   0   NRC                                  NRC       Yes            No    $14,000.00         N/A     $14,000.00
MO   GTE  7-SHT.16   8   2016 Channels                        MRC      Yes             Yes   $14,430.00     $2,212.12   $12,217.88
MO   GTE  7-SHT.16   0   NRC                                  NRC      Yes             No    $21,000.00         N/A     $21,000.00
                         Digital Channel Capacity -
                         84 Month Contract
MO   GTE  7-SHT.17   8   24 Channels                          MRC      Yes             Yes   $300.00        $45.99      $254.01
</TABLE>

                                 Page 6



<PAGE>   95

                 GTE TELEPHONE OPERATIONS HEADQUARTERS
             RESALE PRODUCTS & SERVICES - STATE OF MISSOURI




<TABLE>
<CAPTION>
                                                                 Billing Resale      Discount   Retail   Avoided     Resale
ST  CO    TAR SEC    Rule       Service Description                Type Position     Position    Rate      Cost       Rate
<S>  <C>  <C>       <C>  <C>                                        <C> <C>             <C>     <C>         <C>        <C>
MO   GTE  7-SHT.17   0   NRC                                        NRC  Yes            No      $250.00     N/A        $250.00
MO   GTE  7-SHT.17   8   48 Channels                                MRC  Yes            Yes     $460.00     $70.52     $389.48
MO   GTE  7-SHT.17   0   NRC                                        NRC  Yes            No      $500.00     N/A        $500.00
MO   GTE  7-SHT.17   8   72 Channels                                MRC  Yes            Yes     $620.00     $95.05     $524.95
MO   GTE  7-SHT.17   0   NRC                                        NRC  Yes            No      $750.00     N/A        $750.00
MO   GTE  7-SHT.17   8   96 Channels                                MRC  Yes            Yes     $780.00    $119.57     $660.43
MO   GTE  7-SHT.17   0   NRC                                        NRC  Yes            No    $1,000.00     N/A      $1,000.00
MO   GTE  7-SHT.17   8   120 Channels                               MRC  Yes            Yes     $940.00    $144.10     $795.90
MO   GTE  7-SHT.17   0   NRC                                        NRC  Yes            No    $1,250.00     N/A      $1,250.00
MO   GTE  7-SHT.17   8   144 Channels                               MRC  Yes            Yes   $1,100.00    $168.63     $931.37
MO   GTE  7-SHT.17   0   NRC                                        NRC  Yes            No    $1,500.00     N/A      $1,500.00
MO   GTE  7-SHT.17   8   192 Channels                               MRC  Yes            Yes   $1,420.00    $217.69   $1,202.31
MO   GTE  7-SHT.17   0   NRC                                        NRC  Yes            No    $2,000.00     N/A      $2,000.00
MO   GTE  7-SHT.17   8   240 Channels                               MRC  Yes            Yes   $1,740.00    $266.74   $1,473.26
MO   GTE  7-SHT.17   0   NRC                                        NRC  Yes            No    $2,500.00     N/A      $2,500.00
MO   GTE  7-SHT.17   8   288 Channels                               MRC  Yes            Yes   $2,060.00    $315.80   $1,744.20
MO   GTE  7-SHT.17   0   NRC                                        NRC  Yes            No    $3,000.00     N/A      $3,000.00
MO   GTE  7-SHT.17   8   384 Channels                               MRC  Yes            Yes   $2,700.00    $413.91   $2,286.09
MO   GTE  7-SHT.17   0   NRC                                        NRC  Yes            No    $4,000.00     N/A      $4,000.00
MO   GTE  7-SHT.17   8   480 Channels                               MRC  Yes            Yes   $3,340.00    $512.02   $2,827.98
MO   GTE  7-SHT.17   0   NRC                                        NRC  Yes            No    $5,000.00     N/A      $5,000.00
MO   GTE  7-SHT.17   8   576 Channels                               MRC  Yes            Yes   $3,980.00    $610.13   $3,369.87
MO   GTE  7-SHT.17   0   NRC                                        NRC  Yes            No    $6,000.00     N/A      $6,000.00
MO   GTE  7-SHT.17   8   672 Channels                               MRC  Yes            Yes   $4,620.00    $708.25   $3,911.75
MO   GTE  7-SHT.17   0   NRC                                        NRC  Yes            No    $7,000.00     N/A      $7,000.00
MO   GTE  7-SHT.17   8   1344 Channels                              MRC  Yes            Yes   $9,100.00  $1,395.03   $7,704.97
MO   GTE  7-SHT.17   0   NRC                                        NRC  Yes            No   $14,000.00     N/A     $14,000.00
MO   GTE  7-SHT.17   8   2016 Channels                              MRC  Yes            Yes  $13,580.00  $2,081.81  $11,498.19
MO   GTE  7-SHT.17   0   NRC                                        NRC  Yes            No   $21,000.00     N/A     $21,000.00
                         Digital Channel Capacity - Month to Month
MO   GTE  7-SHT.18   8   24 Channels                                MRC  Yes            Yes     $300.00     $45.99     $254.01
MO   GTE  7-SHT.18   8   48 Channels                                MRC  Yes            Yes     $460.00     $70.52     $389.48
MO   GTE  7-SHT.18   8   72 Channels                                MRC  Yes            Yes     $620.00     $95.05     $524.95
MO   GTE  7-SHT.18   8   96 Channels                                MRC  Yes            Yes     $780.00    $119.57     $660.43
MO   GTE  7-SHT.18   8   120 Channels                               MRC  Yes            Yes     $940.00    $144.10     $795.90
MO   GTE  7-SHT.18   8   144 Channels                               MRC  Yes            Yes   $1,100.00    $168.63     $931.37
MO   GTE  7-SHT.18   8   192 Channels                               MRC  Yes            Yes   $1,420.00    $217.69   $1,202.31
MO   GTE  7-SHT.18   8   240 Channels                               MRC  Yes            Yes   $1,740.00    $266.74   $1,473.26
MO   GTE  7-SHT.18   8   288 Channels                               MRC  Yes            Yes   $2,060.00    $315.80   $1,744.20
MO   GTE  7-SHT.18   8   384 Channels                               MRC  Yes            Yes   $2,700.00    $413.91   $2,286.09
MO   GTE  7-SHT.18   8   480 Channels                               MRC  Yes            Yes   $3,340.00    $512.02   $2,827.98
MO   GTE  7-SHT.18   8   576 Channels                               MRC  Yes            Yes   $3,980.00    $610.13   $3,369.87
MO   GTE  7-SHT.18   8   672 Channels                               MRC  Yes            Yes   $4,620.00    $708.25   $3,911.75
</TABLE>

                                 Page 7



<PAGE>   96

                 GTE TELEPHONE OPERATIONS HEADQUARTERS
             RESALE PRODUCTS & SERVICES - STATE OF MISSOURI




<TABLE>
<CAPTION>
                                                                 Billing  Resale          Discount   Retail   Avoided    Resale
ST  CO    TAR SEC    Rule       Service Description               Type     Position       Position    Rate      Cost      Rate
<S>  <C>  <C>       <C>     <C>                                     <C>  <C>                 <C>     <C>      <C>         <C>
MO   GTE  7-SHT.18   8   1344 Channels                              MRC  Yes                 Yes   $9,100.00  $1,395.03   $7,704.97
MO   GTE  7-SHT.18   8   2016 Channels                              MRC  Yes                 Yes  $13,580.00  $2,081.81  $11,498.19
MO   GTE  7-SHT.19   8   Digital Channel Activation -
                         per Channel Activated                      MRC  Yes                 Yes       $1.00      $0.15       $0.85
MO   GTE  7-SHT.19   0   NRC                                        NRC  Yes                 No        $6.00     N/A          $6.00
                         Service Activation, per Channel
MO   GTE  7-SHT.19   8   Local Exchane Line/Trunk                   MRC  Yes                 Yes      $16.00      $2.45      $13.55
MO   GTE  7-SHT.19   0   NRC                                        NRC  Yes                 No       $40.00     N/A         $40.00
MO   GTE  7-SHT.19   8   CentraNet Line                             MRC  Yes                 Yes      $20.00      $3.07      $16.93
MO   GTE  7-SHT.19   0   NRC                                        NRC  Yes                 No       $40.00     N/A         $40.00
MO   GTE  7-SHT.19   8   FX, OPX or Private Line                    MRC  Yes                 Yes      $25.00      $3.83      $21.17
MO   GTE  7-SHT.19   0   NRC                                        NRC  Yes                 No       $40.00     N/A         $40.00
MO   GTE  7-SHT.19   8   Digital Data Service 2.4 - 19.2 Kbps       MRC  Yes                 Yes      $60.00      $9.20      $50.80
MO   GTE  7-SHT.19   0   NRC                                        NRC  Yes                 No       $40.00     N/A         $40.00
MO   GTE  7-SHT.19   8   Digital Data Service 56 Kbps               MRC  Yes                 Yes      $65.00      $9.96      $55.04
MO   GTE  7-SHT.19   0   NRC                                        NRC  Yes                 No       $40.00     N/A         $40.00
MO   GTE  7-SHT.19   8   DS1 Service                                MRC  Yes                 Yes      $75.00     $11.50      $63.50
MO   GTE  7-SHT.19   0   NRC                                        NRC  Yes                 No      $500.00     N/A        $500.00
                         Switched Data Service
MO   GTE  7-SHT.19   8   Single Line                                MRC  Yes                 Yes      $10.00      $1.53       $8.47
MO   GTE  7-SHT.19   0   NRC                                        NRC  Yes                 No       $40.00     N/A         $40.00
MO   GTE  7-SHT.19   8   CentraNet                                  MRC  Yes                 Yes      $10.00      $1.53       $8.47
MO   GTE  7-SHT.19   0   NRC                                        NRC  Yes                 No       $40.00     N/A         $40.00
MO   GTE  7-SHT.19   8   CentraNet with DID/DOD                     MRC  Yes                 Yes      $10.00      $1.53       $8.47
MO   GTE  7-SHT.19   0   NRC                                        NRC  Yes                 No       $40.00     N/A         $40.00
                         Customer Premises Channelization -
                         36 Month Contract
MO   GTE  7-SHT.20   8   24 Channels                                MRC  Yes                 Yes     $120.00     $18.40     $101.60
MO   GTE  7-SHT.20   8   48 Channels                                MRC  Yes                 Yes     $240.00     $36.79     $203.21
MO   GTE  7-SHT.20   8   72 Channels                                MRC  Yes                 Yes     $360.00     $55.19     $304.81
MO   GTE  7-SHT.20   8   96 Channels                                MRC  Yes                 Yes     $480.00     $73.58     $406.42
MO   GTE  7-SHT.20   8   120 Channels                               MRC  Yes                 Yes     $600.00     $91.98     $508.02
MO   GTE  7-SHT.20   8   144 Channels                               MRC  Yes                 Yes     $720.00    $110.38     $609.62
MO   GTE  7-SHT.20   8   192 Channels                               MRC  Yes                 Yes     $960.00    $147.17     $812.83
MO   GTE  7-SHT.20   8   240 Channels                               MRC  Yes                 Yes   $1,200.00    $183.96   $1,016.04
MO   GTE  7-SHT.20   8   288 Channels                               MRC  Yes                 Yes   $1,440.00    $220.75   $1,219.25
MO   GTE  7-SHT.20   8   384 Channels                               MRC  Yes                 Yes   $1,920.00    $294.34   $1,625.66
MO   GTE  7-SHT.20   8   480 Channels                               MRC  Yes                 Yes   $2,400.00    $367.92   $2,032.08
MO   GTE  7-SHT.20   8   576 Channels                               MRC  Yes                 Yes   $2,880.00    $441.50   $2,438.50
MO   GTE  7-SHT.20   8   672 Channels                               MRC  Yes                 Yes   $3,360.00    $515.09   $2,844.91
MO   GTE  7-SHT.20   8   1344 Channels                              MRC  Yes                 Yes   $6,720.00  $1,030.18   $5,689.82
MO   GTE  7-SHT.20   8   2016 Channels                              MRC  Yes                 Yes  $10,080.00  $1,545.26   $8,534.74
                         Customer Premises Channelization -
                         60 Month Contract
MO   GTE  7-SHT.21   8   24 Channels                                MRC  Yes                 Yes     $110.00     $16.86      $93.14
MO   GTE  7-SHT.21   8   48 Channels                                MRC  Yes                 Yes     $220.00     $33.73     $186.27
</TABLE>

                                 Page 8



<PAGE>   97

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             RESALE PRODUCTS & SERVICES - STATE OF MISSOURI




<TABLE>
<CAPTION>
                                                                            Billing    Resale   Discount   Retail   Avoided   Resale
ST  CO    TAR SEC    Rule       Service Description                          Type    Position  Position    Rate      Cost      Rate
<S>  <C>  <C>       <C>     <C>                                                <C>  <C>        <C>     <C>         <C>       <C>
MO   GTE  7-SHT.21   8   72 Channels                                           MRC  Yes         Yes    $330.00     $50.59    $279.41
MO   GTE  7-SHT.21   8   96 Channels                                           MRC  Yes         Yes    $440.00     $67.45    $372.55
MO   GTE  7-SHT.21   8   120 Channels                                          MRC  Yes         Yes    $550.00     $84.32    $465.69
MO   GTE  7-SHT.21   8   144 Channels                                          MRC  Yes         Yes    $660.00    $101.18    $558.82
MO   GTE  7-SHT.21   8   192 Channels                                          MRC  Yes         Yes    $880.00    $134.90    $745.10
MO   GTE  7-SHT.21   8   240 Channels                                          MRC  Yes         Yes  $1,100.00    $168.63    $931.37
MO   GTE  7-SHT.21   8   288 Channels                                          MRC  Yes         Yes  $1,320.00    $202.36  $1,117.64
MO   GTE  7-SHT.21   8   384 Channels                                          MRC  Yes         Yes  $1,760.00    $269.81  $1,490.19
MO   GTE  7-SHT.21   8   480 Channels                                          MRC  Yes         Yes  $2,200.00    $337.26  $1,862.74
MO   GTE  7-SHT.21   8   576 Channels                                          MRC  Yes         Yes  $2,640.00    $404.71  $2,235.29
MO   GTE  7-SHT.21   8   672 Channels                                          MRC  Yes         Yes  $3,080.00    $472.16  $2,607.84
MO   GTE  7-SHT.21   8   1344 Channels                                         MRC  Yes         Yes  $6,160.00    $944.33  $5,215.67
MO   GTE  7-SHT.21   8   2016 Channels                                         MRC  Yes         Yes  $9,240.00  $1,416.49  $7,823.51
                         Customer Premises Channelization - 84 Month Contract
MO   GTE  7-SHT.22   8   24 Channels                                           MRC  Yes         Yes    $100.00     $15.33     $84.67
MO   GTE  7-SHT.22   8   48 Channels                                           MRC  Yes         Yes    $200.00     $30.66    $169.34
MO   GTE  7-SHT.22   8   72 Channels                                           MRC  Yes         Yes    $300.00     $45.99    $254.01
MO   GTE  7-SHT.22   8   96 Channels                                           MRC  Yes         Yes    $400.00     $61.32    $338.68
MO   GTE  7-SHT.22   8   120 Channels                                          MRC  Yes         Yes    $500.00     $76.65    $423.35
MO   GTE  7-SHT.22   8   144 Channels                                          MRC  Yes         Yes    $600.00     $91.98    $508.02
MO   GTE  7-SHT.22   8   192 Channels                                          MRC  Yes         Yes    $800.00    $122.64    $677.36
MO   GTE  7-SHT.22   8   240 Channels                                          MRC  Yes         Yes  $1,000.00    $153.30    $846.70
MO   GTE  7-SHT.22   8   288 Channels                                          MRC  Yes         Yes  $1,200.00    $183.96  $1,016.04
MO   GTE  7-SHT.22   8   384 Channels                                          MRC  Yes         Yes  $1,600.00    $245.28  $1,354.72
MO   GTE  7-SHT.22   8   480 Channels                                          MRC  Yes         Yes  $2,000.00    $306.60  $1,693.40
MO   GTE  7-SHT.22   8   576 Channels                                          MRC  Yes         Yes  $2,400.00    $367.92  $2,032.08
MO   GTE  7-SHT.22   8   672 Channels                                          MRC  Yes         Yes  $2,800.00    $429.24  $2,370.76
MO   GTE  7-SHT.22   8   1344 Channels                                         MRC  Yes         Yes  $5,600.00    $858.48  $4,741.52
MO   GTE  7-SHT.22   8   2016 Channels                                         MRC  Yes         Yes  $8,400.00  $1,287.72  $7,112.28
                         Customer Premises Channelization - Month to Month
MO   GTE  7-SHT.23   8   24 Channels                                           MRC  Yes         Yes    $100.00     $15.33     $84.67
MO   GTE  7-SHT.23   8   48 Channels                                           MRC  Yes         Yes    $200.00     $30.66    $169.34
MO   GTE  7-SHT.23   8   72 Channels                                           MRC  Yes         Yes    $300.00     $45.99    $254.01
MO   GTE  7-SHT.23   8   96 Channels                                           MRC  Yes         Yes    $400.00     $61.32    $338.68
MO   GTE  7-SHT.23   8   120 Channels                                          MRC  Yes         Yes    $500.00     $76.65    $423.35
MO   GTE  7-SHT.23   8   144 Channels                                          MRC  Yes         Yes    $600.00     $91.98    $508.02
MO   GTE  7-SHT.23   8   192 Channels                                          MRC  Yes         Yes    $800.00    $122.64    $677.36
MO   GTE  7-SHT.23   8   240 Channels                                          MRC  Yes         Yes  $1,000.00    $153.30    $846.70
MO   GTE  7-SHT.23   8   288 Channels                                          MRC  Yes         Yes  $1,200.00    $183.96  $1,016.04
MO   GTE  7-SHT.23   8   384 Channels                                          MRC  Yes         Yes  $1,600.00    $245.28  $1,354.72
MO   GTE  7-SHT.23   8   480 Channels                                          MRC  Yes         Yes  $2,000.00    $306.60  $1,693.40
MO   GTE  7-SHT.23   8   576 Channels                                          MRC  Yes         Yes  $2,400.00    $367.92  $2,032.08
MO   GTE  7-SHT.23   8   672 Channels                                          MRC  Yes         Yes  $2,800.00    $429.24  $2,370.76
</TABLE>

                                 Page 9


<PAGE>   98

                 GTE TELEPHONE OPERATIONS HEADQUARTERS
             RESALE PRODUCTS & SERVICES - STATE OF MISSOURI

<TABLE>
<CAPTION>
                                                                        Billing  Resale   Discount   Retail   Avoided   Resale
ST  CO    TAR SEC    Rule       Service Description                       Type  Position  Position    Rate      Cost      Rate
<S>  <C>  <C>       <C>     <C>                                            <C>  <C>         <C>     <C>      <C>       <C>
MO   GTE  7-SHT.23   8      1344 Channels                                  MRC  Yes         Yes  $5,600.00    $858.48  $4,741.52
MO   GTE  7-SHT.23   8      2016 Channels                                  MRC  Yes         Yes  $8,400.00  $1,287.72  $7,112.28
                            Customer Premises Channelization -
                            per Channel
MO   GTE  7-SHT.24   8      Local Exchange Line/Trunk                      MRC  Yes         Yes      $5.00      $0.77      $4.23
MO   GTE  7-SHT.24   0      NRC                                            NRC  Yes         No      $20.00     N/A        $20.00
MO   GTE  7-SHT.24   8      CentraNet Line                                 MRC  Yes         Yes      $5.00      $0.77      $4.23
MO   GTE  7-SHT.24   0      NRC                                            NRC  Yes         No      $20.00     N/A        $20.00
MO   GTE  7-SHT.24   8      FX, OPX or Private Line                        MRC  Yes         Yes      $6.00      $0.92      $5.08
MO   GTE  7-SHT.24   0      NRC                                            NRC  Yes         No      $20.00     N/A        $20.00
MO   GTE  7-SHT.24   8      Digital Data Service 2.4 - 19.2 Kbps           MRC  Yes         Yes     $15.00      $2.30     $12.70
MO   GTE  7-SHT.24   0      NRC                                            NRC  Yes         No      $20.00     N/A        $20.00
MO   GTE  7-SHT.24   8      Digital Data Service 56 Kbps                   MRC  Yes         Yes     $20.00      $3.07     $16.93
MO   GTE  7-SHT.24   0      NRC                                            NRC  Yes         No      $20.00     N/A        $20.00
MO   GTE  7-SHT.24   8      Switched Data Service                          MRC  Yes         Yes     $25.00      $3.83     $21.17
MO   GTE  7-SHT.24   0      NRC                                            NRC  Yes         No      $20.00     N/A        $20.00
                         LOCAL DIGITAL DATA SERVICE
                            Special Access Line
MO   GTE  7-SHT.29   0      2.4 - 19.2 Kbps                                MRC  Yes         No      $55.00     N/A        $55.00
MO   GTE  7-SHT.29   0      NRC                                            NRC  Yes         No      $71.00     N/A        $71.00
MO   GTE  7-SHT.29   0      56 Kbps                                        MRC  Yes         No      $68.00     N/A        $68.00
MO   GTE  7-SHT.29   0      NRC                                            NRC  Yes         No      $71.00     N/A        $71.00
                            Special Transport - All Speeds
MO   GTE  7-SHT.29   0      Per Intraexchange/Intraoffice mile             MRC  Yes         No       $2.00     N/A         $2.00
MO   GTE  7-SHT.29   0      Per Termination                                MRC  Yes         No      $25.00     N/A        $25.00
MO   GTE  7-SHT.29   0      Bridging, per Port                             MRC  Yes         No      $12.00     N/A        $12.00
                         GTE DIAL DATALINK SERVICE
MO   GTE  7-SHT.31   8      Bus                                            MRC  Yes         Yes      $5.00      $0.77      $4.23
MO   GTE  7-SHT.31   0      NRC                                            NRC  Yes         No      $25.00     N/A        $25.00
MO   GTE  7-SHT.31   8      Res                                            MRC  Yes         Yes      $5.00      $0.77      $4.23
MO   GTE  7-SHT.31   0      NRC                                            NRC  Yes         No      $25.00     N/A        $25.00
                         LOCAL HIGH CAPACITY DS1 (1.544Mbps) SERVICE
MO   GTE  7-SHT.35   0      Special Access Line, First System -
                            Month to Month                                 MRC  Yes         No     $317.00     N/A       $317.00
MO   GTE  7-SHT.35   0      NRC                                            NRC  Yes         No     $965.00     N/A       $965.00
MO   GTE  7-SHT.35   0      Special Access Line, Each Addl System -
                            Month to Month                                 MRC  Yes         No     $180.00     N/A       $180.00
MO   GTE  7-SHT.35   0      NRC                                            NRC  Yes         No     $128.00     N/A       $128.00
MO   GTE  7-SHT.35   0      Special Access Line, First System -
                            12 Month Contract                              MRC  Yes         No     $301.00     N/A       $301.00
MO   GTE  7-SHT.35   0      Special Access Line, Each Addl System -
                            12 Month Contract                              MRC  Yes         No     $180.00     N/A       $180.00
MO   GTE  7-SHT.35   0      Special Access Line, First System -
                            36 Month Contract                              MRC  Yes         No     $271.00     N/A       $271.00
MO   GTE  7-SHT.35   0      Special Access Line, Each Addl System -
                            36 Month Contract                              MRC  Yes         No     $180.00     N/A       $180.00
</TABLE>                    

                                Page 10

<PAGE>   99

                 GTE TELEPHONE OPERATIONS HEADQUARTERS
             RESALE PRODUCTS & SERVICES - STATE OF MISSOURI



<TABLE>
<CAPTION>
                                                                              Billing  Resale   Discount   Retail   Avoided  Resale
ST  CO    TAR SEC    Rule       Service Description                             Type  Position  Position    Rate      Cost     Rate
<S>  <C>  <C>       <C>     <C>                                                   <C>  <C>          <C>   <C>      <C>       <C>
MO   GTE  7-SHT.35   0      Special Access Line, First System -
                            60 Month Contract                                     MRC  Yes           No   $241.00   N/A    $241.00
MO   GTE  7-SHT.35   0      Special Access Line, Each Addl System -
                            60 Month Contract                                     MRC  Yes           No   $180.00   N/A    $180.00
MO   GTE  7-SHT.36   0      Special Transport, interoffice - intraexchange -
                            per mile                                              MRC  Yes           No    $30.85   N/A     $30.85
MO   GTE  7-SHT.36   0      Special Transport, interoffice - intraexchange -
                            per termination                                       MRC  Yes           No    $50.00   N/A     $50.00
                         VOICE GRADE INTRAEXCHANGE MILEAGE - OPX
MO   GTE  7-SHT.39   8      Line Extension Mileage - single pair,
                            first 1/4 mile                                        MRC  Yes           Yes    $2.05   $0.31    $1.74
MO   GTE  7-SHT.39   8      Each Additional 1/4 mile                              MRC  Yes           Yes    $1.85   $0.28    $1.57
                         LOCAL PRIVATE LINES - VOICE GRADE
MO   GTE  7-SHT.43   0      Special Access Line, 2 Wire                           MRC  Yes           No     $9.40   N/A      $9.40
MO   GTE  7-SHT.43   0      Special Access Line, 4 Wire                           MRC  Yes           No    $18.80   N/A     $18.80
MO   GTE  7-SHT.43   0      Special Transport, interoffice Intraexchange,
                            per mile                                              MRC  Yes           No     $5.00   N/A      $5.00
MO   GTE  7-SHT.43   0      Bridging, per port                                    MRC  Yes           No     $8.00   N/A      $8.00
MO   GTE  7-SHT.43   0      Conditioning                                          MRC  Yes           No    $19.00   N/A     $19.00
MO   GTE  7-SHT.43   0      NRC                                                   NRC  Yes           No    $46.65   N/A     $46.65
                         SWITCHED DATA SERVICE
MO   GTE  7-SHT.56   8      Low Speed, Single Line                                MRC  Yes           Yes   $37.00   $5.67   $31.33
MO   GTE  7-SHT.56   0      NRC                                                   NRC  Yes           No    $50.00   N/A     $50.00
MO   GTE  7-SHT.56   8      Low Speed,  CentraNet Line, 2-49 Lines                MRC  Yes           Yes   $40.00   $6.13   $33.87
MO   GTE  7-SHT.56   8      50-100 Lines                                          MRC  Yes           Yes   $37.00   $5.67   $31.33
MO   GTE  7-SHT.56   8      101 and above Lines                                   MRC  Yes           Yes   $34.00   $5.21   $28.79
MO   GTE  7-SHT.56   8      High Speed, Single Line                               MRC  Yes           Yes   $47.00   $7.21   $39.79
MO   GTE  7-SHT.56   0      NRC                                                   NRC  Yes           No    $50.00   N/A     $50.00
MO   GTE  7-SHT.56   8      High Speed, CentraNet Line, 2-49 Lines                MRC  Yes           Yes   $50.00   $7.67   $42.34
MO   GTE  7-SHT.56   8      50-100 Lines                                          MRC  Yes           Yes   $47.00   $7.21   $39.79
MO   GTE  7-SHT.56   8      101 and above Lines                                   MRC  Yes           Yes   $44.00   $6.75   $37.25
                            Switched Data - Individual Line Loop
                            Extension Access
MO   GTE  7-SHT.57   8      Single Line - Monthly                                 MRC  Yes           Yes   $50.00   $7.67   $42.34
MO   GTE  7-SHT.57   0      NRC                                                   NRC  Yes           No    $50.00   N/A     $50.00
MO   GTE  7-SHT.57   8      CentraNet Line - Monthly                              MRC  Yes           Yes   $50.00   $7.67   $42.34
MO   GTE  7-SHT.57   0      NRC                                                   NRC  Yes           No    $50.00   N/A     $50.00
                            Switched Data - Individual Loop Extension Channel
MO   GTE  7-SHT.57   8      Single Line - Monthly                                 MRC  Yes           Yes   $12.00   $1.84   $10.16
MO   GTE  7-SHT.57   0      NRC                                                   NRC  Yes           No    $50.00   N/A     $50.00
MO   GTE  7-SHT.57   8      CentraNet Line - Monthly                              MRC  Yes           Yes   $15.00   $2.30   $12.70
MO   GTE  7-SHT.57   0      NRC                                                   NRC  Yes           No    $50.00   N/A     $50.00
MO   GTE  7-SHT.58   8      Switched Data Central Office Termination,
                            per access arrangement                                MRC  Yes           Yes  $150.00  $23.00  $127.01
MO   GTE  7-SHT.58   0      NRC                                                   NRC  Yes           No   $125.00   N/A    $125.00
MO   GTE  7-SHT.58   8      Switched Data Central Office Channelization
                            Single Line                                           MRC  Yes           Yes    $7.00   $1.07    $5.93
MO   GTE  7-SHT.58   8      Switched Data Central Office Channelization
                            Multiline with DID/DOD                                MRC  Yes           Yes    $7.00   $1.07    $5.93
</TABLE>


                                Page 11



<PAGE>   100

                 GTE TELEPHONE OPERATIONS HEADQUARTERS
             RESALE PRODUCTS & SERVICES - STATE OF MISSOURI

<TABLE>
<CAPTION>
                                                                             Billing  Resale  Discount   Retail   Avoided   Resale
ST  CO    TAR SEC    Rule       Service Description                            Type  Position Position    Rate      Cost      Rate
<S>  <C>  <C>       <C>     <C>                                                  <C>   <C>        <C>    <C>     <C>      <C>
MO   GTE  7-SHT.58   8      Switched Data Central Office Channelization -
                            CentraNet Line                                       MRC   Yes        Yes    $7.00   $1.07   $5.93
MO   GTE  7-SHT.58   8      Switched Data Customer Premises Termination          MRC   Yes        Yes  $100.00  $15.33  $84.67
MO   GTE  7-SHT.58   0      NRC                                                  NRC   Yes        No    $75.00   N/A    $75.00
MO   GTE  7-SHT.58   8      Switched Data Customer Premises Channelization       MRC   Yes        Yes   $25.00   $3.83  $21.17
MO   GTE  7-SHT.58   0      NRC                                                  NRC   Yes        No    $20.00   N/A    $20.00
                            Optional Features
MO   GTE  7-SHT.59   8      Data Direct Connect                                  MRC   Yes        Yes    $1.00   $0.15   $0.85
MO   GTE  7-SHT.59   8      Data Closed User Group                               MRC   Yes        Yes    $1.00   $0.15   $0.85
                            Voice Option Per Line
MO   GTE  7-SHT.59   8      Single Line                                          MRC   Yes        Yes    $8.00   $1.23   $6.77
MO   GTE  7-SHT.59   8      CentraNet Line                                       MRC   Yes        Yes    $5.00   $0.77   $4.23
                            Optional Feature Packages
MO   GTE  7-SHT.59   8      Data 1000                                            MRC   Yes        Yes    $3.00   $0.46   $2.54
MO   GTE  7-SHT.59   8      Data 1000 with Toll Restriction                      MRC   Yes        Yes    $3.00   $0.46   $2.54
MO   GTE  7-SHT.59   8      Data 2000                                            MRC   Yes        Yes    $5.00   $0.77   $4.23
MO   GTE  7-SHT.59   8      Data 2000 with Toll Restriction                      MRC   Yes        Yes    $5.00   $0.77   $4.23
MO   GTE  7-SHT.59   0      Software Reconfiguration Charge                      NRC   Yes        No    $12.75   N/A    $12.75
MO   GTE  7-SHT.60   8      Switched Data Network Usage -
                            Local Call Setup, per call                          USAGE  Yes        Yes  $0.0300   $0.00   $0.03
MO   GTE  7-SHT.60   8      Switched Data Network Usage -
                            Usage, per minute of use                            USAGE  Yes        Yes  $0.0200   $0.00   $0.02
                         ISDN (INTERGRATED SERVICES DIGITAL NETWORK)
                            SINGLE LINE SERVICES
                            Home Digital (ISDN) Single Line Service
                            Digital Single Line Access
MO   GTE  7-SHT.83   0      NRC                                                  NRC   Yes        No    $50.00    N/A   $50.00
MO   GTE  7-SHT.83   8      Month to Month Rate                                  MRC   Yes        Yes   $31.00   $4.75  $26.25
MO   GTE  7-SHT.83   8      12 Month Rate                                        MRC   Yes        Yes   $26.00   $3.99  $22.01
MO   GTE  7-SHT.83   8      36 Month Rate                                        MRC   Yes        Yes   $23.00   $3.53  $19.47
                            Channel Capability                                                                    N/A
                            B-Voice/CSD, per line                                                                 N/A
MO   GTE  7-SHT.83   8      Month to Month Rate                                  MRC   Yes        Yes    $2.00   $0.31   $1.69
MO   GTE  7-SHT.83   8      12 Month Rate                                        MRC   Yes        Yes    $2.00   $0.31   $1.69
MO   GTE  7-SHT.83   8      36 Month Rate                                        MRC   Yes        Yes    $2.00   $0.31   $1.69
                            D-Packet, per channel                                                                 N/A
MO   GTE  7-SHT.83   8      Month to Month Rate                                  MRC   Yes        Yes    $5.00   $0.77   $4.23
MO   GTE  7-SHT.83   8      12 Month Rate                                        MRC   Yes        Yes    $5.00   $0.77   $4.23
MO   GTE  7-SHT.83   8      36 Month Rate                                        MRC   Yes        Yes    $5.00   $0.77   $4.23
                            Business Digital (ISDN) Single Line Service
                            Digital Single Line Access
MO   GTE  7-SHT.84   0      NRC                                                  NRC   Yes        No    $50.00   N/A    $50.00
MO   GTE  7-SHT.84   8      Month to Month Rate                                  MRC   Yes        Yes   $39.00   $5.98  $33.02
MO   GTE  7-SHT.84   8      12 Month Rate                                        MRC   Yes        Yes   $34.00   $5.21  $28.79
MO   GTE  7-SHT.84   8      36 Month Rate                                        MRC   Yes        Yes   $31.00   $4.75  $26.25
</TABLE>

                                Page 12


<PAGE>   101


                 GTE TELEPHONE OPERATIONS HEADQUARTERS
             RESALE PRODUCTS & SERVICES - STATE OF MISSOURI



<TABLE>
<CAPTION>
                                                               Billing  Resale      Discount   Retail   Avoided   Resale
ST  CO    TAR SEC    Rule       Service Description              Type  Position     Position    Rate      Cost      Rate
<S>  <C>  <C>       <C>     <C>                                    <C>  <C>             <C>    <C>      <C>       <C>
                         Channel Capability                                                    N/A
                         B-Voice/CSD, per line                                                 N/A
MO   GTE  7-SHT.84   8   Month to Month Rate                       MRC  Yes             Yes   $5.00   $0.77   $4.23
MO   GTE  7-SHT.84   8   12 Month Rate                             MRC  Yes             Yes   $5.00   $0.77   $4.23
MO   GTE  7-SHT.84   8   36 Month Rate                             MRC  Yes             Yes   $5.00   $0.77   $4.23
                         D-Packet, per channel                                                          N/A
MO   GTE  7-SHT.84   8   Month to Month Rate                       MRC  Yes             Yes   $5.00   $0.77   $4.23
MO   GTE  7-SHT.84   8   12 Month Rate                             MRC  Yes             Yes   $5.00   $0.77   $4.23
MO   GTE  7-SHT.84   8   36 Month Rate                             MRC  Yes             Yes   $5.00   $0.77   $4.23
                         Usage Options
                         Home Digital (ISDN), per line
MO   GTE  7-SHT.85   8   25 hour block of time                     MRC  Yes             Yes  $25.00   $3.83  $21.17
MO   GTE  7-SHT.85   8   50 hour block of time                     MRC  Yes             Yes  $43.00   $6.59  $36.41
MO   GTE  7-SHT.85   8   Flat Rate                                 MRC  Yes             Yes  $50.00   $7.67  $42.34
                         Business Digital (ISDN), per line                                             N/A
MO   GTE  7-SHT.85   8   50 hour block of time                     MRC  Yes             Yes  $43.00   $6.59  $36.41
MO   GTE  7-SHT.85   8   100 hour block of time                    MRC  Yes             Yes  $80.00  $12.26  $67.74
                         Feature Package Rates (Home or Business)
                         MBKS Basic Svc, per line
MO   GTE  7-SHT.86   0   NRC                                       NRC  Yes             No   $25.00   N/A    $25.00
MO   GTE  7-SHT.86   8   Monthly Rate                              MRC  Yes             Yes   $6.00   $0.92   $5.08
MO   GTE  7-SHT.86   8   12 Month Rate                             MRC  Yes             Yes   $6.00   $0.92   $5.08
MO   GTE  7-SHT.86   8   36 Month Rate                             MRC  Yes             Yes   $6.00   $0.92   $5.08
                         CSD 1000, per line                                                            N/A
MO   GTE  7-SHT.86   0   NRC                                       NRC  Yes             No   $15.00   N/A    $15.00
MO   GTE  7-SHT.86   8   Monthly Rate                              MRC  Yes             Yes   $3.00   $0.46   $2.54
MO   GTE  7-SHT.86   8   12 Month Rate                             MRC  Yes             Yes   $3.00   $0.46   $2.54
MO   GTE  7-SHT.86   8   36 Month Rate                             MRC  Yes             Yes   $3.00   $0.46   $2.54
                         CSD 2000, per line                                                           N/A
MO   GTE  7-SHT.86   0   NRC                                       NRC  Yes             No   $15.00   N/A    $15.00
MO   GTE  7-SHT.86   8   Monthly Rate                              MRC  Yes             Yes   $5.00   $0.77   $4.23
MO   GTE  7-SHT.86   8   12 Month Rate                             MRC  Yes             Yes   $5.00   $0.77   $4.23
MO   GTE  7-SHT.86   8   36 Month Rate                             MRC  Yes             Yes   $5.00   $0.77   $4.23
                         X.25 Deluxe Pkg, per line                                                    N/A
MO   GTE  7-SHT.86   0   NRC                                       NRC  Yes             No   $15.00   N/A    $15.00
MO   GTE  7-SHT.86   8   Monthly Rate                              MRC  Yes             Yes   $5.00   $0.77   $4.23
MO   GTE  7-SHT.86   8   12 Month Rate                             MRC  Yes             Yes   $5.00   $0.77   $4.23
MO   GTE  7-SHT.86   8   36 Month Rate                             MRC  Yes             Yes   $5.00   $0.77   $4.23
                         Individual Optional Feature Rates
                         Data Direct Connect, per line
MO   GTE  7-SHT.86   8   Monthly Rate                              MRC  Yes             Yes   $1.00   $0.15   $0.85
MO   GTE  7-SHT.86   8   12 Month Rate                             MRC  Yes             Yes   $1.00   $0.15   $0.85
MO   GTE  7-SHT.86   8   36 Month Rate                             MRC  Yes             Yes   $1.00   $0.15   $0.85
</TABLE>

                                Page 13

<PAGE>   102

                 GTE TELEPHONE OPERATIONS HEADQUARTERS
             RESALE PRODUCTS & SERVICES - STATE OF MISSOURI

<TABLE>
<CAPTION>
                                                                              Billing  Resale    Discount   Retail  Avoided  Resale
ST  CO    TAR SEC    Rule       Service Description                             Type  Position   Position    Rate    Cost    Rate
<S>  <C>  <C>       <C>     <C>                                                  <C>  <C>           <C>     <C>      <C>     <C>
                            Digital (ISDN) Individual Line Loop Extension,
                            per line
MO   GTE  7-SHT.87    0     NRC                                                  NRC  Yes            No   $50.00   N/A    $50.00
MO   GTE  7-SHT.87    8     MRC                                                  MRC  Yes            Yes  $21.00   $3.22  $17.78
MO   GTE  7-SHT.87    8     Foreign Exchange Provisioning, per line  -
                            MRC                                                  MRC  Yes            Yes  $75.00  $11.50  $63.50
MO   GTE  7-SHT.87    8     Foreign Exchange Provisioning,
                            interoffice transport, per mile-MRC                  MRC  Yes            Yes   $7.50   $1.15   $6.35
MO   GTE  7-SHT.87    8     Additional Directory Numbers, each - MRC             MRC  Yes            Yes   $2.00   $0.31   $1.69
MO   GTE  7-SHT.87    0     Data Base Changes, Add Line Features -
                            NRC                                                  NRC  Yes            No   $25.00   N/A    $25.00
                          PUBLIC TELEPHONE SERVICE
MO   GTE  8-SHT.5     0     Rate Each Local Message                              NRC  No             No    $0.25   N/A     N/A
                          SEMI-PUBLIC TELEPHONE SERVICE
MO   GTE  8-SHT.7     0     Rate Each Local Message                              NRC  No             No    $0.25   N/A     N/A
                          OPERATOR AND DIRECTORY SERVICE
                            Directory Assistance Service
MO   GTE  9-SHT.3     0     Local Director Assistance 1+411, per call            NRC  Yes            No    $0.40   N/A     $0.40
MO   GTE  9-SHT.3     0     1+555+1212 Directory Assistance, per call            NRC  Yes            No    $0.40   N/A     $0.40
MO   GTE  9-SHT.3     0     Operator connected Directory Assistance,
                            per call                                             NRC  Yes            No    $0.45   N/A     $0.45
MO   GTE  9-SHT.3     0     Directory Calls billed to a Third Number
                            or Calling Card                                      NRC  Yes            No    $0.45   N/A     $0.45
MO   GTE  9-SHT.3.3   0     Directory Connect PLUS                               NRC  Yes            No    $0.50   N/A     $0.50
                            Directory Listings                                                                     N/A
                            Additional Listings                                                                    N/A
MO   GTE  9-SHT.7     0     Bus                                                  MRC  No             No    $1.95   N/A     N/A
MO   GTE  9-SHT.7     0     Res                                                  MRC  No             No    $1.55   N/A     N/A
                            Foreign Exchange Listings                                                              N/A
MO   GTE  9-SHT.7     0     Bus                                                  MRC  No             No    $1.95   N/A     N/A
MO   GTE  9-SHT.7     0     Res                                                  MRC  No             No    $1.55   N/A     N/A
MO   GTE  9-SHT.7     0     Nonlisted Service                                    MRC  No             No    $1.55   N/A     N/A
MO   GTE  9-SHT.7     0     Nonpublished Service                                 MRC  No             No    $1.60   N/A     N/A
                            Intercept Services - 90 day Period                                                     N/A
MO   GTE  9-SHT.9     0     Bus                                                  NRC  Yes            No   $10.00   N/A    $10.00
MO   GTE  9-SHT.9     0     Res                                                  NRC  Yes            No   $10.00   N/A    $10.00
                            Local Operator Service Charges                                                         N/A
MO   GTE  9-SHT.11    0     Busy Line Interrupt                                  NRC  Yes            No    $0.95   N/A     $0.95
MO   GTE  9-SHT.11    0     Busy Line Verify                                     NRC  Yes            No    $0.50   N/A     $0.50
MO   GTE  9-SHT.11    0     Calling Card Call                                    NRC  Yes            No    $0.60   N/A     $0.60
MO   GTE  9-SHT.11    0     Operator Assisted Station Call                       NRC  Yes            No    $1.15   N/A     $1.15
MO   GTE  9-SHT.11    0     Operator Assisted Person to Person Call              NRC  Yes            No    $2.40   N/A     $2.40
                          CALL RESTRICTION SERVICES
                            Billed Number Screening Service
</TABLE>


                                Page 14



<PAGE>   103

                 GTE TELEPHONE OPERATIONS HEADQUARTERS
             RESALE PRODUCTS & SERVICES - STATE OF MISSOURI

<TABLE>
<CAPTION>
                                                                             Billing Resale   Discount  Retail Avoided   Resale
ST  CO    TAR SEC    Rule       Service Description                            Type  Position  Position  Rate    Cost      Rate
<S>  <C>  <C>         <C>     <C>                                               <C>  <C>           <C>    <C>    <C>       <C>
MO   GTE  10-SHT.1    8       Option 1 - Collect and Third Number Billing       MRC  Yes           Yes    $4.10  $0.63    $3.47
MO   GTE  10-SHT.1    8       Option 2 - Third Number Billing                   MRC  Yes           Yes    $4.10  $0.63    $3.47
MO   GTE  10-SHT.1    8       Option 3 - Collect Billing                        MRC  Yes           Yes    $4.10  $0.63    $3.47
                              Selective Class of Call Screening Service
MO   GTE  10-SHT.3    8       Outgoning Screening per Line                      MRC  Yes           Yes    $4.10  $0.63    $3.47
                              Toll Blocking Service
MO   GTE  10-SHT.5    8       Option 1, per line                                MRC  Yes           Yes    $4.10  $0.63    $3.47
MO   GTE  10-SHT.5    0       NRC                                               NRC  Yes           No     $8.00   N/A     $8.00
MO   GTE  10-SHT.5    8       Option 2, per line                                MRC  Yes           Yes    $4.10  $0.63    $3.47
MO   GTE  10-SHT.5    0       NRC                                               NRC  Yes           No     $8.00   N/A     $8.00
MO   GTE  10-SHT.6    0       700 Blocking Service, per each additional
                              Business Line                                     NRC  Yes           No     $4.00   N/A     $4.00
MO   GTE  10-SHT.7    0       900 Blocking Service, per each additional
                              Business Line                                     NRC  Yes           No     $4.00   N/A     $4.00
MO   GTE  10-SHT.8    0       976 Blocking Service, per each Additional
                              Business Line                                     NRC  Yes           No     $4.00   N/A     $4.00
                              CUSTOMIZED NUMBER SERVICE
                              Per Customized Number requested and placed
                              into service
MO   GTE  10-SHT.10   8       Bus                                               MRC  Yes           Yes    $3.50  $0.54    $2.96
MO   GTE  10-SHT.10   8       Res                                               MRC  Yes           Yes    $1.50  $0.23    $1.27
                          DIRECT INWARD DIALING SERVICE (DID)
                              Per Block of 100 Numbers
MO   GTE  10-SHT.12   8       Assigned, each block                              MRC  Yes           Yes   $32.00  $4.91   $27.09
MO   GTE  10-SHT.12   8       Reserved, each block                              MRC  Yes           Yes   $32.00  $4.91   $27.09
                              Per Block of 20 Numbers
MO   GTE  10-SHT.12   8       Assigned, each block                              MRC  Yes           Yes   $18.00  $2.76   $15.24
MO   GTE  10-SHT.12   8       Reserved, each block                              MRC  Yes           Yes   $18.00  $2.76   $15.24
MO   GTE  10-SHT.12   8       Per Trunk Termination Charge                      MRC  Yes           Yes   $35.00  $5.37   $29.63
                          EMERGENCY CONFERENCE SERVICE (FIREBAR)
MO   GTE  10-SHT.14   0       Solid State - Type 10 (10 stations)               MRC  Yes           Yes   $46.25  $0.00   $46.25
MO   GTE  10-SHT.14   0       NRC                                               NRC  Yes           No   $177.15   N/A   $177.15
MO   GTE  10-SHT.14   0       Solid State - Type 20 (20 stations)               MRC  Yes           Yes   $71.05  $0.00   $71.05
MO   GTE  10-SHT.14   0       NRC                                               NRC  Yes           No   $272.05   N/A   $272.05
MO   GTE  10-SHT.14   0       Solid State - Type 30 (30 stations)               MRC  Yes           Yes   $95.85  $0.00   $95.85
MO   GTE  10-SHT.14   0       NRC                                               NRC  Yes           No   $367.10   N/A   $367.10
MO   GTE  10-SHT.14   0       Solid State - Type 40 (40 stations)               MRC  Yes           Yes  $135.35  $0.00  $135.35
MO   GTE  10-SHT.14   0       NRC                                               NRC  Yes           No   $518.35   N/A   $518.35
MO   GTE  10-SHT.14   0       Solid State - Type 50 (50 stations)               MRC  Yes           Yes  $165.35  $0.00  $165.35
MO   GTE  10-SHT.14   0       NRC                                               NRC  Yes           No   $633.20   N/A   $633.20
MO   GTE  10-SHT.14   0       Solid State - Type 60 (60 stations)               MRC  Yes           Yes  $191.75  $0.00  $191.75
MO   GTE  10-SHT.14   0       NRC                                               NRC  Yes           No   $734.30   N/A   $734.30
                              Options for Type 10, 20 and 30 Systems                                              N/A
</TABLE>

                                Page 15

<PAGE>   104

                 GTE TELEPHONE OPERATIONS HEADQUARTERS
             RESALE PRODUCTS & SERVICES - STATE OF MISSOURI

<TABLE>
<CAPTION>
                                                                            Billing   Resale   Discount   Retail   Avoided   Resale
ST  CO    TAR SEC    Rule       Service Description                          Type    Position  Position    Rate      Cost      Rate
<S>  <C>  <C>       <C>     <C>                                              <C>       <C>       <C>        <C>      <C>       <C>
MO   GTE  10-SHT.14   0     Siren Control                                    MRC       Yes       Yes       $4.50     $0.00    $4.50
MO   GTE  10-SHT.14   0     NRC                                              NRC       Yes       No       $17.15       N/A   $17.15
MO   GTE  10-SHT.14   0     Remote Answer, 10-30 Line System                 MRC       Yes       Yes       $1.15     $0.00    $1.15
MO   GTE  10-SHT.14   0     NRC                                              NRC       Yes       No        $4.35       N/A    $4.35
                            Options for Type 40, 50 and 60 Systems                                                     N/A
MO   GTE  10-SHT.15   0     Siren Control                                    MRC       Yes       Yes       $4.50     $0.00    $4.50
MO   GTE  10-SHT.15   0     NRC                                              NRC       Yes       No       $17.15       N/A   $17.15
MO   GTE  10-SHT.15   0     Automatic Access                                 MRC       Yes       Yes       $3.15     $0.00    $3.15
MO   GTE  10-SHT.15   0     NRC                                              NRC       Yes       No       $14.15       N/A   $14.15
MO   GTE  10-SHT.15   0     Manual Access for 40 - 60 Line Systems           MRC       Yes       Yes       $0.40     $0.00    $0.40
MO   GTE  10-SHT.15   0     NRC                                              NRC       Yes       No        $1.55       N/A    $1.55
MO   GTE  10-SHT.15   0     Remote Answer, 40-60 Line System                 MRC       Yes       Yes       $1.80     $0.00    $1.80
MO   GTE  10-SHT.15   0     NRC                                              NRC       Yes       No        $6.95       N/A    $6.95
                          FOREIGN EXCHANGE SERVICE
MO   GTE  10-SHT.20         Local B1 required & refer to Interexchange
                            Private Line Tariff
                          RESERVED TELEPHONE NUMBERS
MO   GTE  10-SHT.21   8     per Reserved Telephone Number                    MRC        Yes      Yes       $5.00     $0.77    $4.23
                          SPECIAL BILLING NUMBER SERVICE
MO   GTE  10-SHT.32   8     First Number Billed with Customers main number   MRC        Yes      Yes       $2.00     $0.31    $1.69
MO   GTE  10-SHT.32   8     Each Additional Number Billed with Customers
                            main number                                      MRC        Yes      Yes       $1.15     $0.18    $0.97
MO   GTE  10-SHT.32   8     Each Special Billing Number Billed Separately    MRC        Yes      Yes       $4.25     $0.65    $3.60
                          TOLL TAPES
MO   GTE  10-SHT.33   8     Long Distance or WATS calls on Magnetic Tape -
                            Monthly Arrangement                              MRC        Yes      Yes      $32.65     $5.01   $27.64
MO   GTE  10-SHT.33   8     Long Distance or WATS calls on Magnetic Tape - 
                            Upon Request                                     NRC        Yes      No       $40.65       N/A   $40.65
                          CENTRANET SERVICE
                            CentraNet Service Line Rates
                            Month to Month Contract
MO   GTE  11-SHT.22   8     3-25 Lines, per Line                              MRC       Yes      Yes       $15.00     $2.30  $12.70
MO   GTE  11-SHT.22   8     26-50 Lines, per Line                             MRC       Yes      Yes       $14.75     $2.26  $12.49
                            36 Month Contract
MO   GTE  11-SHT.22   8     26-50 Lines, per Line                             MRC       Yes      Yes       $13.75     $2.11  $11.64
MO   GTE  11-SHT.22   8     51-100 Lines, per Line                            MRC       Yes      Yes       $13.00     $1.99  $11.01
MO   GTE  11-SHT.22   8     101-200 Lines, per Line                           MRC       Yes      Yes       $12.25     $1.88  $10.37
                            60 Month Contract
MO   GTE  11-SHT.22   8     26-50 Lines, per Line                             MRC       Yes      Yes       $12.75     $1.95  $10.80
MO   GTE  11-SHT.22   8     51-100 Lines, per Line                            MRC       Yes      Yes       $12.00     $1.84  $10.16
MO   GTE  11-SHT.22   8     101-200 Lines, per Line                           MRC       Yes      Yes       $11.25     $1.72  $ 9.53
</TABLE>


                                Page 16



<PAGE>   105

                 GTE TELEPHONE OPERATIONS HEADQUARTERS
             RESALE PRODUCTS & SERVICES - STATE OF MISSOURI




<TABLE>
<CAPTION>
                                                                        Billing Resale       Discount   Retail   Avoided   Resale
ST  CO    TAR SEC    Rule       Service Description                       Type  Position     Position    Rate      Cost      Rate
<S>  <C>  <C>       <C>     <C>                                            <C>  <C>            <C>        <C>      <C>       <C>
MO   GTE  11-SHT.23   8   Feature Package 1000, per Line                   MRC  Yes             Yes    $1.50   $0.23    $1.27
MO   GTE  11-SHT.23   8   Feature Package 2000, per Line                   MRC  Yes             Yes    $2.20   $0.34    $1.86
MO   GTE  11-SHT.23   8   Feature Package 3000, per Line                   MRC  Yes             Yes    $2.55   $0.39    $2.16
                          CCLASS Feature Package
MO   GTE  11-SHT.23   8   3-25 Lines, per Line                             MRC  Yes             Yes    $5.00   $0.77    $4.23
MO   GTE  11-SHT.23   8   26-50 Lines, per Line                            MRC  Yes             Yes    $4.50   $0.69    $3.81
MO   GTE  11-SHT.23   8   51+ Lines, per Line                              MRC  Yes             Yes    $4.00   $0.61    $3.39
MO   GTE  11-SHT.23   8   Additional CentraNet Network Access, each Trunk  MRC  Yes             Yes   $15.00   $2.30   $12.70
MO   GTE  11-SHT.24   8   CentraNet PBX Trunk Add-on                       MRC  Yes             Yes    $5.00   $0.77    $4.23
                          Programming Charges
MO   GTE  11-SHT.24   0   First Line Programmed or Reprogrammed            NRC  Yes             No    $25.00   N/A     $25.00
MO   GTE  11-SHT.24   0   Each Additional Line Programmed or Reprogrammed  NRC  Yes             No     $2.50   N/A      $2.50
                          Optional Features
MO   GTE  11-SHT.25   8   Authorization Codes (per group of 10)            MRC  Yes             Yes    $0.05   $0.01    $0.04
MO   GTE  11-SHT.25   8   Automatic Route Selection, per line              MRC  Yes             Yes    $2.00   $0.31    $1.69
MO   GTE  11-SHT.25   8   Code Call Access                                 MRC  Yes             Yes   $20.00   $3.07   $16.93
MO   GTE  11-SHT.25   8   Conference Calling                               MRC  Yes             Yes   $90.00  $13.80   $76.20
MO   GTE  11-SHT.25   8   Data Link Console Interface                      MRC  Yes             Yes   $70.00  $10.73   $59.27
MO   GTE  11-SHT.25   8   Dictation Access and Control                     MRC  Yes             Yes   $20.00   $3.07   $16.93
MO   GTE  11-SHT.25   8   Flexible Night Answer                            MRC  Yes             Yes    $0.20   $0.03    $0.17
MO   GTE  11-SHT.25   8   FX Access                                        MRC  Yes             Yes    $6.00   $0.92    $5.08
MO   GTE  11-SHT.25   8   Identification-Multiple Directoru Numbers        MRC  Yes             Yes    $0.10   $0.02    $0.08
MO   GTE  11-SHT.25   8   Music-on-hold Interface                          MRC  Yes             Yes   $20.00   $3.07   $16.93
MO   GTE  11-SHT.25   8   Non-Data Link Console Interface                  MRC  Yes             Yes   $50.00   $7.67   $42.34
MO   GTE  11-SHT.25   8   Paging/Public Address Access                     MRC  Yes             Yes   $20.00   $3.07   $16.93
MO   GTE  11-SHT.25   8   Pilot Number of Hunt Groups                      MRC  Yes             Yes    $0.05   $0.01    $0.04
MO   GTE  11-SHT.25   8   Predetermined Night Answer-Fixed                 MRC  Yes             Yes    $0.20   $0.03    $0.17
MO   GTE  11-SHT.25   8   Preferential Hunting                             MRC  Yes             Yes    $0.05   $0.01    $0.04
MO   GTE  11-SHT.25   8   Priority Queuing                                 MRC  Yes             Yes    $1.00   $0.15    $0.85
MO   GTE  11-SHT.25   8   Proprietary Set Interface                        MRC  Yes             Yes    $5.00   $0.77    $4.23
MO   GTE  11-SHT.25   8   Pseudo Number Flat Rate Service                  MRC  Yes             Yes    $6.00   $0.92    $5.08
MO   GTE  11-SHT.25   8   Recorded Announcement                            MRC  Yes             Yes   $15.00   $2.30   $12.70
MO   GTE  11-SHT.25   8   Speed Call 30 (System)                           MRC  Yes             Yes    $0.10   $0.02    $0.08
MO   GTE  11-SHT.25   8   Station Message Detail Recording, per line       MRC  Yes             Yes    $0.50   $0.08    $0.42
MO   GTE  11-SHT.25   8   Stop Hunt                                        MRC  Yes             Yes    $0.75   $0.11    $0.64
MO   GTE  11-SHT.25   8   T-1 Access                                       MRC  Yes             Yes  $300.00  $45.99  $254.01
MO   GTE  11-SHT.25   8   Terminal Make Busy                               MRC  Yes             Yes    $0.50   $0.08    $0.42
MO   GTE  11-SHT.25   8   Tie Facility Access                              MRC  Yes             Yes    $6.00   $0.92    $5.08
MO   GTE  11-SHT.25   8   Universal Night Answer                           MRC  Yes             Yes    $0.10   $0.02    $0.08
MO   GTE  11-SHT.25   8   WATS Access                                      MRC  Yes             Yes    $1.00   $0.15    $0.85
MO   GTE  11-SHT.25   8   800 Service Access                               MRC  Yes             Yes    $1.00   $0.15    $0.85
                          Caller ID - Number
MO   GTE  11-SHT.26   8   3-25 Lines, per line                             MRC  Yes             Yes    $6.00   $0.92    $5.08
</TABLE>

                                Page 17


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                 GTE TELEPHONE OPERATIONS HEADQUARTERS
             RESALE PRODUCTS & SERVICES - STATE OF MISSOURI

<TABLE>
<CAPTION>
                                                                            Billing    Resale   Discount  Retail Avoided    Resale
ST  CO    TAR SEC    Rule       Service Description                           Type    Position  Position  Rate      Cost      Rate
<S>  <C>  <C>       <C>     <C>                                                <C>        <C>  <C>        <C>    <C>        <C>
MO   GTE  11-SHT.26   8     26-50 Lines, per line                               MRC       Yes  Yes       $4.50   $0.69       $3.81
MO   GTE  11-SHT.26   8     51+ Lines, per line                                 MRC       Yes  Yes       $2.00   $0.31       $1.69
MO   GTE  11-SHT.26   8     3-25 Lines, per customer group                      MRC       Yes  Yes      $10.00   $1.53       $8.47
MO   GTE  11-SHT.26   8     26-50 Lines, per cusaomer group                     MRC       Yes  Yes      $20.00   $3.07      $16.93
MO   GTE  11-SHT.26   8     51+ Lines, per customer group                       MRC       Yes  Yes      $40.00   $6.13      $33.87
MO   GTE  11-SHT.26   8     Caller ID - Name and Number                                                          N/A
MO   GTE  11-SHT.26   8     3-25 Lines, per customer group                      MRC       Yes  Yes      $25.00   $3.83      $21.17
MO   GTE  11-SHT.26   8     26-50 Lines, per customer group                     MRC       Yes  Yes      $45.00   $6.90      $38.10
MO   GTE  11-SHT.26   8     51+ Lines, per customer group                       MRC       Yes  Yes      $85.00  $13.03      $71.97
MO   GTE  11-SHT.26   8     Call Tracing Service                                MRC       Yes  Yes       $3.50   $0.54       $2.96
MO   GTE  11-SHT.26   8     VIP Alert                                           MRC       Yes  Yes       $4.00   $0.61       $3.39
MO   GTE  11-SHT.26   8     CentraNet System Interface                                                           N/A
MO   GTE  11-SHT.26   8     Attendant Console Interface, per interface                                           N/A
MO   GTE  11-SHT.26   8     36 Month Contract Period                            MRC       Yes  Yes     $170.00  $26.06     $143.94
MO   GTE  11-SHT.26   8     60 Month Contract Period                            MRC       Yes  Yes     $125.00  $19.16     $105.84
                          EMERGENCY TELEPHONE SERVICE (911)
MO   GTE  11-SHT.50   0     Automatic Number Identification (ANI),
                            per central office                                  MRC       Yes  No       $69.00   N/A        $69.00
                      0     911 Network Service                                                                  N/A
MO   GTE  11-SHT.50   0     PSAP to Central Office  Flat Rate,
                            per line                                            MRC       Yes  No       $30.00   N/A        $30.00
MO   GTE  11-SHT.50   0     NRC                                                 NRC       Yes  No      $393.00   N/A       $393.00
MO   GTE  11-SHT.50   0     CO to CO Interoffice Facility  Flat Rate,
                            per trunk                                           MRC       Yes  No       $25.00   N/A        $25.00
MO   GTE  11-SHT.50   0     NRC                                                 NRC       Yes  No      $312.00   N/A       $312.00
                      0     Automatic Location Identification (ALI)
                            Database                                                                             N/A
MO   GTE  11-SHT.51   0     Database Administration, per database               MRC       Yes  No      $380.00   N/A       $380.00
                      0     Database                                                                             N/A
MO   GTE  11-SHT.51   0     each GTE subscriber record                          MRC       Yes  No        $0.04   N/A         $0.04
MO   GTE  11-SHT.51   0     NRC                                                 NRC       Yes  No        $0.75   N/A         $0.75
MO   GTE  11-SHT.51   0     each Non-GTE subscriber record                      MRC       Yes  No        $0.04   N/A         $0.04
MO   GTE  11-SHT.51   0     NRC                                                 NRC       Yes  No        $0.35   N/A         $0.35
                      0     Selective Routing                                                                    N/A
MO   GTE  11-SHT.51   0     Database Administration, per database               MRC       Yes  No        $8.50   N/A         $8.50
MO   GTE  11-SHT.51   0     NRC                                                 NRC       Yes  No    $2,461.00   N/A     $2,461.00
MO   GTE  11-SHT.51   0     Database, per record                                MRC       Yes  No        $0.01   N/A         $0.01
MO   GTE  11-SHT.51   0     NRC                                                 NRC       Yes  No        $0.14   N/A         $0.14
MO   GTE  11-SHT.52   0     Selective Router, each                              MRC       Yes  No    $1,363.00   N/A     $1,363.00
MO   GTE  11-SHT.52   0     NRC                                                 NRC       Yes  No   $13,280.00   N/A    $13,280.00
MO   GTE  11-SHT.52   0     Selective Router Interface, per trunk
                            termination                                         MRC       Yes  No       $36.50   N/A        $36.50
MO   GTE  11-SHT.52   0     NRC                                                 NRC       Yes  No      $150.00   N/A       $150.00
                      0     Alternate Network Routing - TELTONE SWITCHED
                            ACCESS SYSTEM                                                                        N/A
                      0     Trunk Dial Unit (TDU)                                                                N/A
MO   GTE  11-SHT.52   0     Without Monitoring, 1st Trunk                       MRC       Yes  No      $189.58   N/A       $189.58
MO   GTE  11-SHT.52   0     NRC                                                 NRC       Yes  No    $2,081.11   N/A     $2,081.11
</TABLE>

                                Page 18


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             RESALE PRODUCTS & SERVICES - STATE OF MISSOURI



<TABLE>
<CAPTION>
                                                                              Billing  Resale   Discount  Retail Avoided  Resale
ST  CO    TAR SEC    Rule       Service Description                             Type  Position  Position   Rate    Cost   Rate
<S>  <C>  <C>       <C>     <C>                                                  <C>     <C>   <C>         <C>      <C>  <C>
MO   GTE  11-SHT.52     0   Without Monitoring, add'l Trunk in same CO           MRC      Yes  No          $90.87   N/A   $90.87
MO   GTE  11-SHT.52     0   NRC                                                  NRC      Yes  No          $507.26  N/A  $507.26
                        0   Call Answer Unit (CAU)                                                                  N/A
MO   GTE  11-SHT.52     0   Without Monitoring, 1st Trunk                        MRC      Yes  No          $84.79   N/A   $84.79
MO   GTE  11-SHT.52     0   NRC                                                  NRC      Yes  No          $481.53  N/A  $481.53
MO   GTE  11-SHT.52     0   Without Monitoring, add'l Trunk in same CO           MRC      Yes  No          $48.68   N/A   $48.68
MO   GTE  11-SHT.52     0   NRC                                                  NRC      Yes  No          $403.36  N/A  $403.36
                        0   Call Transfer Unit (CTU)                                                                N/A
MO   GTE  11-SHT.52     0   Without Monitoring, 1st Trunk                        MRC      Yes  No          $88.55   N/A   $88.55
MO   GTE  11-SHT.52     0   NRC                                                  NRC      Yes  No          $755.76  N/A  $755.76
MO   GTE  11-SHT.52     0   Without Monitoring, add'l Trunk in same CO           MRC      Yes  No          $42.68   N/A   $42.68
MO   GTE  11-SHT.52     0   NRC                                                  NRC      Yes  No          $375.44  N/A  $375.44
                        0   Alternate Network Routing - PROCTOR INSTANT NETWORK BACKUP                              N/A
                            SYS.
                        0   Instant Network Backup (INB) Mini-Pac                                                   N/A
MO   GTE  11-SHT.52.1   0   Without Monitoring, 1st Trunk                        MRC      Yes  No          $115.94  N/A  $115.94
MO   GTE  11-SHT.52.1   0   NRC                                                  NRC      Yes  No          $666.09  N/A  $666.09
MO   GTE  11-SHT.52.1   0   Without Monitoring, add'l Trunk in same CO           MRC      Yes  No          $101.24  N/A  $101.24
MO   GTE  11-SHT.52.1   0   NRC                                                  NRC      Yes  No          $507.26  N/A  $507.26
MO   GTE  11-SHT.52.1   0   With Monitoring, 1st Trunk                           MRC      Yes  No          $129.64  N/A  $129.64
MO   GTE  11-SHT.52.1   0   NRC                                                  NRC      Yes  No          $666.09  N/A  $666.09
MO   GTE  11-SHT.52.1   0   With Monitoring, add'l Trunk in same CO              MRC      Yes  No          $114.93  N/A  $114.93
MO   GTE  11-SHT.52.1   0   NRC                                                  NRC      Yes  No          $507.26  N/A  $507.26
                        0   Instant Network BackUp (INB) Shelf System                                               N/A
MO   GTE  11-SHT.52.1   0   Without Monitoring, 1st Trunk                        MRC      Yes  No          $163.72  N/A  $163.72
MO   GTE  11-SHT.52.1   0   NRC                                                  NRC      Yes  No          $755.76  N/A  $755.76
MO   GTE  11-SHT.52.1   0   Without Monitoring, add'l Trunk in same CO           MRC      Yes  No          $54.82   N/A   $54.82
MO   GTE  11-SHT.52.1   0   NRC                                                  NRC      Yes  No          $375.44  N/A  $375.44
MO   GTE  11-SHT.52.1   0   With Monitoring, 1st Trunk                           MRC      Yes  No          $188.62  N/A  $188.62
MO   GTE  11-SHT.52.1   0   NRC                                                  NRC      Yes  No          $755.76  N/A  $755.76
MO   GTE  11-SHT.52.1   0   With Monitoring, add'l Trunk in same CO              MRC      Yes  No          $59.18   N/A   $59.18
MO   GTE  11-SHT.52.1   0   NRC                                                  NRC      Yes  No          $375.44  N/A  $375.44
MO   GTE  11-SHT.52.1   0   Expansion Shelf                                      MRC      Yes  No          $77.54   N/A   $77.54
MO   GTE  11-SHT.52.1   0   NRC                                                  NRC      Yes  No          $375.44  N/A  $375.44
                        0   Instant Network Backup (INB) Responder Equipment                                        N/A
MO   GTE  11-SHT.52.2   0   PSAP Responder, 1st Responder                        MRC      Yes  No          $130.85  N/A  $130.85
MO   GTE  11-SHT.52.2   0   NRC                                                  NRC      Yes  No          $589.16  N/A  $589.16
MO   GTE  11-SHT.52.2   0   PSAP Responder, Add'l Responder                      MRC      Yes  No          $127.58  N/A  $127.58
MO   GTE  11-SHT.52.2   0   NRC                                                  NRC      Yes  No          $589.16  N/A  $589.16
MO   GTE  11-SHT.52.2   0   Central Office Responder, 1st Responder              MRC      Yes  No          $80.27  N/A   $80.27
MO   GTE  11-SHT.52.2   0   NRC                                                  NRC      Yes  No          $589.16  N/A  $589.16
MO   GTE  11-SHT.52.2   0   Central Office Responder, Add'l Responder            MRC      Yes  No          $50.67  N/A   $50.67
MO   GTE  11-SHT.52.2   0   NRC                                                  NRC      Yes  No          $589.16  N/A  $589.16
MO   GTE  11-SHT.52.2   0   INB Line Switch or 4/2 Converter Card                MRC      Yes  No          $15.19  N/A   $15.19
</TABLE>

                                Page 19



<PAGE>   108

                 GTE TELEPHONE OPERATIONS HEADQUARTERS
             RESALE PRODUCTS & SERVICES - STATE OF MISSOURI

<TABLE>
<CAPTION>
                                                                           Billing   Resale  Discount   Retail Avoided  Resale
ST  CO    TAR SEC    Rule       Service Description                          Type   Position Position    Rate    Cost    Rate
<S>  <C>  <C>       <C>     <C>                                               <C>        <C>      <C>   <C>      <C>    <C>
MO   GTE  11-SHT.52.2   0   NRC                                                NRC        Yes     No    $13.32   N/A    $13.32
MO   GTE  11-SHT.52.2   0   INB Cellular Transceiver                           MRC        Yes     No    $66.50   N/A    $66.50
MO   GTE  11-SHT.52.2   0   NRC                                                NRC        Yes     No   $507.26   N/A   $507.26
                        0   INB Cellular Antenna
MO   GTE  11-SHT.52.2   0   3 dB Antenna                                       MRC        Yes     No     $1.93   N/A     $1.93
MO   GTE  11-SHT.52.2   0   NRC                                                NRC        Yes     No    $13.32   N/A    $13.32
MO   GTE  11-SHT.52.2   0   9 dB Antenna                                       MRC        Yes     No    $10.67   N/A    $10.67
MO   GTE  11-SHT.52.2   0   NRC                                                NRC        Yes     No   $124.35   N/A   $124.35
                        0   Alternate Network Routing - TELLULAR
                            PHONECELL SERVICES EQUIP.                                                            N/A
MO   GTE  11-SHT.52.3   0   Cellular Transceivers, 1M Transceiver              MRC        Yes     No    $38.30   N/A    $38.30
MO   GTE  11-SHT.52.3   0   NRC                                                NRC        Yes     No   $831.52   N/A   $831.52
MO   GTE  11-SHT.52.3   0   Cellular Transceivers, 4M Transceiver              MRC        Yes     No   $122.87   N/A   $122.87
MO   GTE  11-SHT.52.3   0   NRC                                                NRC        Yes     No   $919.18   N/A   $919.18
MO   GTE  11-SHT.52.3   0   Cellular Antennas, 3 B Antenna                     MRC        Yes     No     $2.06   N/A     $2.06
MO   GTE  11-SHT.52.3   0   NRC                                                NRC        Yes     No    $13.32   N/A    $13.32
MO   GTE  11-SHT.52.3   0   Cellular Antennas, 12 B Antenna                    MRC        Yes     No     $4.13   N/A     $4.13
MO   GTE  11-SHT.52.3   0   NRC                                                NRC        Yes     No   $124.35   N/A   $124.35
                        0   Distribution Machine for the Address and
                            Routing Control System (DMARCS)                                                      N/A
MO   GTE  11-SHT.52.3   0   Per ALI Computer to which records will be
                            downloaded                                         MRC        Yes     No   $154.03   N/A   $154.03
MO   GTE  11-SHT.52.3   0   NRC                                                NRC        Yes     No   $104.00   N/A   $104.00
                        0   Private Switch (PS) 911 Service                                                   N/A
MO   GTE  11-SHT.52.5   0   GTE PS ENTRY Full Site Administration Package      MRC        Yes     No   $150.02   N/A   $150.02
MO   GTE  11-SHT.52.5   0   NRC                                                NRC        Yes     No   $512.28   N/A   $512.28
MO   GTE  11-SHT.52.5   0   GTE PS ALI Software Package                        MRC        Yes     No    $16.45   N/A    $16.45
MO   GTE  11-SHT.52.5   0   NRC                                                NRC        Yes     No   $266.21   N/A   $266.21
MO   GTE  11-SHT.52.5   0   GTE PS ALI LQ Parallel Printer                     MRC        Yes     No    $34.38   N/A    $34.38
MO   GTE  11-SHT.52.5   0   NRC                                                NRC        Yes     No   $201.18   N/A   $201.18
                                                                                                                 N/A
                            LOCAL SERVICES LIMITED TO EXISTING CUSTOMERS                                         N/A
                            AT EXISTING LOCATIONS                                                                N/A
                                                                                                                 N/A
                            SmartCall Services                                                                   N/A
                            Camp on/Busy Number Redial                                                           N/A
MO   GTE  6-SHT 14      8   Bus                                                MRC        Yes     Yes    $4.00  $0.61    $3.39
MO   GTE  6-SHT 14      8   Res                                                MRC        Yes     Yes    $4.00  $0.61    $3.39
                            Last Number/Save Number Redial                                                       N/A
MO   GTE  6-SHT 15      8   Bus                                                MRC        Yes     Yes    $4.00  $0.61    $3.39
MO   GTE  6-SHT 15      8   Res                                                MRC        Yes     Yes    $4.00  $0.61    $3.39
                            Smart Ring with any PAK                                                              N/A
MO   GTE  6-SHT 15      8   Res                                                MRC        Yes     Yes    $3.00  $0.46    $2.54
                            Special Call Waiting                                                                 N/A
MO   GTE  6-SHT 16      8   Bus                                                MRC        Yes     Yes    $6.00  $0.92    $5.08
</TABLE>

                                Page 20


<PAGE>   109


                 GTE TELEPHONE OPERATIONS HEADQUARTERS
             RESALE PRODUCTS & SERVICES - STATE OF MISSOURI



<TABLE>
<CAPTION>
                                                                      Billing  Resale       Discount  Retail  Avoided   Resale
ST  CO    TAR SEC    Rule       Service Description                     Type  Position      Position  Rate    Cost     Rate
<S>  <C>  <C>       <C>     <C>                                          <C>  <C>               <C>   <C>    <C>     <C>
MO   GTE  6-SHT 16      8   Res                                          MRC  Yes               Yes   $5.00  $0.77   $4.23
                            Economy Package                                                                   N/A
MO   GTE  6-SHT 17      8   Bus                                          MRC  Yes               Yes   $4.35  $0.67   $3.68
MO   GTE  6-SHT 17      8   Res                                          MRC  Yes               Yes   $4.35  $0.67   $3.68
                            Professional Package                                                              N/A
MO   GTE  6-SHT 17      8   Bus                                          MRC  Yes               Yes   $7.90  $1.21   $6.69
MO   GTE  6-SHT 17      8   Res                                          MRC  Yes               Yes   $7.90  $1.21   $6.69
                            Smarter Call PAK                                                                  N/A
MO   GTE  6-SHT 17      8   Res                                          MRC  Yes               Yes   $4.50  $0.69   $3.81
                            Smartest Call PAK                                                                 N/A
MO   GTE  6-SHT 17      8   Bus                                          MRC  Yes               Yes   $7.50  $1.15   $6.35
MO   GTE  6-SHT 17      8   Res                                          MRC  Yes               Yes   $6.50  $1.00   $5.50
                                                                                                              N/A
                            Emergency Conference Service                                                      N/A
                            Automatic Type                                                                    N/A
MO   GTE  10-SHT 15     8   Up to 10 reporting stations                  MRC  Yes               Yes  $25.00  $3.83  $21.17
MO   GTE  10-SHT 15     0   NRC                                          NRC  Yes               No   $25.00   N/A   $25.00
MO   GTE  10-SHT 15     8   Up to 20 reporting stations                  MRC  Yes               Yes  $40.00  $6.13  $33.87
MO   GTE  10-SHT 15     0   NRC                                          NRC  Yes               No   $40.00   N/A   $40.00
MO   GTE  10-SHT 15     8   Control Relay, per siren                     MRC  Yes               Yes   $0.50  $0.08   $0.42
MO   GTE  10-SHT 15     0   NRC                                          NRC  Yes               No    $5.00   N/A    $5.00
MO   GTE  10-SHT 15     8   Pushbottons or Keys, each                    MRC  Yes               Yes   $0.50  $0.08   $0.42
MO   GTE  10-SHT 15     0   NRC                                          NRC  Yes               No    $5.00   N/A    $5.00
MO   GTE  10-SHT 15     8   Each line or additional lines                MRC  Yes               Yes   $2.00  $0.31   $1.69
MO   GTE  10-SHT 15     8   Central Office Common Equipment              MRC  Yes               Yes  $12.00  $1.84  $10.16
MO   GTE  10-SHT 15     0   NRC                                          NRC  Yes               No    $5.00   N/A    $5.00
MO   GTE  10-SHT 15     8   Additional Common Equipment                  MRC  Yes               Yes   $1.50  $0.23   $1.27
MO   GTE  10-SHT 15     0   NRC                                          NRC  Yes               No    $5.00   N/A    $5.00
MO   GTE  10-SHT 15     8   Pushbotton Number Term                       MRC  Yes               Yes   $0.35  $0.05   $0.30
MO   GTE  10-SHT 15     0   NRC                                          NRC  Yes               No    $5.00   N/A    $5.00
                                                                                                              N/A
                            CentraNet Service Lines                                                           N/A
                            60 Month Contract                                                                 N/A
MO   GTE  11-SHT 22.1   8   4-15 lines, each                             MRC  Yes               Yes  $13.85  $2.12  $11.73
MO   GTE  11-SHT 22.1   8   16-20 lines, each                            MRC  Yes               Yes  $12.10  $1.85  $10.25
                            84 Month Contract                                                                 N/A
MO   GTE  11-SHT 22.1   8   4-15 lines, each                             MRC  Yes               Yes  $12.05  $1.85  $10.20
MO   GTE  11-SHT 22.1   8   16-20 lines, each                            MRC  Yes               Yes  $10.00  $1.53   $8.47
                                                                                                              N/A
                            Group Alerting and Dispatching Service                                            N/A
                            Basic fire reporting common equipment                                             N/A
MO   GTE  13-SHT 6      0   In former GTE Systems of Missouri Exchanges  MRC  Yes               No   $12.00   N/A   $12.00
</TABLE>

                                Page 21


<PAGE>   110

                 GTE TELEPHONE OPERATIONS HEADQUARTERS
             RESALE PRODUCTS & SERVICES - STATE OF MISSOURI

<TABLE>
<CAPTION>
                                                                             Billing    Resale   Discount Retail Avoided Resale
ST  CO    TAR SEC    Rule       Service Description                             Type   Position  Position  Rate    Cost   Rate
<S>  <C>  <C>       <C>     <C>                                                  <C>         <C>   <C>    <C>      <C>   <C>
MO   GTE  13-SHT 6    0     In former GTE of Eastern Missouri Exchanges          MRC           Yes  No    $21.40   N/A   $21.40
                            Fire reporting system equipment multiplies                                             N/A
MO   GTE  13-SHT 6    0     In former GTE Systems of Missouri Exchanges          MRC           Yes  No     $1.50   N/A    $1.50
MO   GTE  13-SHT 6    0     In former GTE of Eastern Missouri Exchanges          MRC           Yes  No     $3.55   N/A    $3.55
                                                                                                                   N/A
                            Hotel/Motel Trunks (Level 8)                                                           N/A
MO   GTE  13-SHT 7    8     Inside Base Rate Area, per line                      MRC           Yes  Yes   $13.25  $2.03  $11.22
MO   GTE  13-SHT 7    8     Outside Base Rate Area, per line                     MRC           Yes  Yes   $19.10  $2.93  $16.17
                                                                                                                   N/A
                            Special Reversed Charge Toll Service
                            (Enterprise/Zenith)                                                                    N/A
                            Rate per exchange                                                                      N/A
MO   GTE  13-SHT 10   8     In former GTE North Exchanges                        MRC           Yes  Yes    $6.65  $1.02   $5.63
MO   GTE  13-SHT 10   8     In former GTE Missouri Exchanges                     MRC           Yes  Yes   $10.60  $1.62   $8.98
                                                                                                                   N/A
                            Transfer Service                                                                       N/A
                            Customer Transfer Service                                                              N/A
MO   GTE  13-SHT 12   8     For former GTE North                                 MRC           Yes  Yes    $5.00  $0.77   $4.23
MO   GTE  13-SHT 12   0     NRC                                                  NRC           Yes  No    $13.30   N/A   $13.30
MO   GTE  13-SHT 12   0     Subsequent Line Charge, NRC                          NRC           Yes  No     $6.65   N/A    $6.65
MO   GTE  13-SHT 12   8     For former GTE Missouri                              MRC           Yes  Yes    $4.75  $0.73   $4.02
MO   GTE  13-SHT 12   8     For former GTE Systems of Missouri                   MRC           Yes  Yes    $6.00  $0.92   $5.08
MO   GTE  13-SHT 12   8     For former GTE of Eastern Missouri                   MRC           Yes  Yes    $6.50  $1.00   $5.50
                                                                                                                   N/A
                          INTRALATA LONG DISTANCE MESSAGE TELECOMMUNICATIONS
                          SERVICE                                                                                  N/A
                            GTE MIDWEST INCORPORATED PSC MO. NO. 3                                                 N/A
                            OPERATOR SERVICE CHARGES                                                               N/A
MO   GTE  D-SHT 24    0     Dial Calling Card Station-to-Station, per call       NRC           Yes  No     $0.60   N/A    $0.60
MO   GTE  D-SHT 24    0     Operator Station-to-Station, per call                NRC           Yes  No     $1.15   N/A    $1.15
MO   GTE  D-SHT 24    0     Person-to-Person, per call                           NRC           Yes  No     $2.40   N/A    $2.40
MO   GTE  D-SHT 24    0     Line Status Verification, per call                   NRC           Yes  No     $0.50   N/A    $0.50
MO   GTE  D-SHT 24    0     Busy Interrupt, per call                             NRC           Yes  No     $0.95   N/A    $0.95
                            DAY MESSAGE RATES - Initial 1 Minute
MO   GTE  D-SHT 27    8     1-10 miles                                          USAGE          Yes  Yes  $0.0900  $0.01   $0.08
MO   GTE  D-SHT 27    8     11-14 miles                                         USAGE          Yes  Yes  $0.1200  $0.02   $0.10
MO   GTE  D-SHT 27    8     15-18 miles                                         USAGE          Yes  Yes  $0.1700  $0.03   $0.14
MO   GTE  D-SHT 27    8     19-23 miles                                         USAGE          Yes  Yes  $0.2300  $0.04   $0.19
MO   GTE  D-SHT 27    8     24-28 miles                                         USAGE          Yes  Yes  $0.3600  $0.06   $0.30
MO   GTE  D-SHT 27    8     29-33 miles                                         USAGE          Yes  Yes  $0.3900  $0.06   $0.33
MO   GTE  D-SHT 27    8     34-40 miles                                         USAGE          Yes  Yes  $0.4000  $0.06   $0.34
MO   GTE  D-SHT 27    8     41-50 miles                                         USAGE          Yes  Yes  $0.4200  $0.06   $0.36
MO   GTE  D-SHT 27    8     51-60 miles                                         USAGE          Yes  Yes  $0.4600  $0.07   $0.39
</TABLE>


                                Page 22


<PAGE>   111

                 GTE TELEPHONE OPERATIONS HEADQUARTERS
             RESALE PRODUCTS & SERVICES - STATE OF MISSOURI

<TABLE>
<CAPTION>
                                                                          Billing    Resale   Discount   Retail   Avoided   Resale
ST  CO    TAR SEC    Rule       Service Description                        Type     Position  Position    Rate      Cost      Rate
<S>  <C>  <C>       <C>     <C>                                            <C>        <C>       <C>        <C>      <C>       <C>
MO   GTE  D-SHT 27   8   61-80 miles                                       USAGE      Yes       Yes          $0.4700  $0.07  $0.40
MO   GTE  D-SHT 27   8   81-100 miles                                      USAGE      Yes       Yes          $0.4800  $0.07  $0.41
MO   GTE  D-SHT 27   8   101-125 miles                                     USAGE      Yes       Yes          $0.4800  $0.07  $0.41
MO   GTE  D-SHT 27   8   126-150 miles                                     USAGE      Yes       Yes          $0.5100  $0.08  $0.43
MO   GTE  D-SHT 27   8   Over 150 miles                                    USAGE      Yes       Yes          $0.5400  $0.08  $0.46
                         DAY MESSAGE RATES - Each Additional Minute
MO   GTE  D-SHT 27   8   1-10 miles                                        USAGE      Yes       Yes          $0.0800  $0.01  $0.07
MO   GTE  D-SHT 27   8   11-14 miles                                       USAGE      Yes       Yes          $0.1100  $0.02  $0.09
MO   GTE  D-SHT 27   8   15-18 miles                                       USAGE      Yes       Yes          $0.1400  $0.02  $0.12
MO   GTE  D-SHT 27   8   19-23 miles                                       USAGE      Yes       Yes          $0.1600  $0.02  $0.14
MO   GTE  D-SHT 27   8   24-28 miles                                       USAGE      Yes       Yes          $0.2000  $0.03  $0.17
MO   GTE  D-SHT 27   8   29-33 miles                                       USAGE      Yes       Yes          $0.2200  $0.03  $0.19
MO   GTE  D-SHT 27   8   34-40 miles                                       USAGE      Yes       Yes          $0.2400  $0.04  $0.20
MO   GTE  D-SHT 27   8   41-50 miles                                       USAGE      Yes       Yes          $0.2500  $0.04  $0.21
MO   GTE  D-SHT 27   8   51-60 miles                                       USAGE      Yes       Yes          $0.2700  $0.04  $0.23
MO   GTE  D-SHT 27   8   61-80 miles                                       USAGE      Yes       Yes          $0.3000  $0.05  $0.25
MO   GTE  D-SHT 27   8   81-100 miles                                      USAGE      Yes       Yes          $0.3100  $0.05  $0.26
MO   GTE  D-SHT 27   8   101-125 miles                                     USAGE      Yes       Yes          $0.3400  $0.05  $0.29
MO   GTE  D-SHT 27   8   126-150 miles                                     USAGE      Yes       Yes          $0.3600  $0.06  $0.30
MO   GTE  D-SHT 27   8   Over 150 miles                                    USAGE      Yes       Yes          $0.3600  $0.06  $0.30
                              EVENING MESSAGE RATES - Initial 1 Minute
                              (20% Reduction to DAY Rate)
MO   GTE  D-SHT 27   8   1-10 miles                                        USAGE      Yes       Yes          $0.0720  $0.01  $0.06
MO   GTE  D-SHT 27   8   11-14 miles                                       USAGE      Yes       Yes          $0.0960  $0.01  $0.08
MO   GTE  D-SHT 27   8   15-18 miles                                       USAGE      Yes       Yes          $0.1360  $0.02  $0.12
MO   GTE  D-SHT 27   8   19-23 miles                                       USAGE      Yes       Yes          $0.1840  $0.03  $0.16
MO   GTE  D-SHT 27   8   24-28 miles                                       USAGE      Yes       Yes          $0.2880  $0.04  $0.24
MO   GTE  D-SHT 27   8   29-33 miles                                       USAGE      Yes       Yes          $0.3120  $0.05  $0.26
MO   GTE  D-SHT 27   8   34-40 miles                                       USAGE      Yes       Yes          $0.3200  $0.05  $0.27
MO   GTE  D-SHT 27   8   41-50 miles                                       USAGE      Yes       Yes          $0.3360  $0.05  $0.28
MO   GTE  D-SHT 27   8   51-60 miles                                       USAGE      Yes       Yes          $0.3680  $0.06  $0.31
MO   GTE  D-SHT 27   8   61-80 miles                                       USAGE      Yes       Yes          $0.3760  $0.06  $0.32
MO   GTE  D-SHT 27   8   81-100 miles                                      USAGE      Yes       Yes          $0.3840  $0.06  $0.33
MO   GTE  D-SHT 27   8   101-125 miles                                     USAGE      Yes       Yes          $0.3840  $0.06  $0.33
MO   GTE  D-SHT 27   8   126-150 miles                                     USAGE      Yes       Yes          $0.4080  $0.06  $0.35
MO   GTE  D-SHT 27   8   Over 150 miles                                    USAGE      Yes       Yes          $0.4320  $0.07  $0.37
                         EVENING MESSAGE RATES - Each Additional Minute
                         (20% Reduction to DAY Rate)
MO   GTE  D-SHT 27   8   1-10 miles                                        USAGE      Yes       Yes          $0.0640  $0.01  $0.05
MO   GTE  D-SHT 27   8   11-14 miles                                       USAGE      Yes       Yes          $0.0880  $0.01  $0.07
MO   GTE  D-SHT 27   8   15-18 miles                                       USAGE      Yes       Yes          $0.1120  $0.02  $0.09
MO   GTE  D-SHT 27   8   19-23 miles                                       USAGE      Yes       Yes          $0.1280  $0.02  $0.11
MO   GTE  D-SHT 27   8   24-28 miles                                       USAGE      Yes       Yes          $0.1600  $0.02  $0.14
MO   GTE  D-SHT 27   8   29-33 miles                                       USAGE      Yes       Yes          $0.1760  $0.03  $0.15
MO   GTE  D-SHT 27   8   34-40 miles                                       USAGE      Yes       Yes          $0.1920  $0.03  $0.16
</TABLE>


                                Page 23


<PAGE>   112

                 GTE TELEPHONE OPERATIONS HEADQUARTERS
             RESALE PRODUCTS & SERVICES - STATE OF MISSOURI

<TABLE>
<CAPTION>
                                                                          Billing    Resale   Discount   Retail   Avoided   Resale
ST  CO    TAR SEC    Rule       Service Description                        Type     Position  Position    Rate      Cost      Rate
<S>  <C>  <C>       <C>     <C>                                            <C>        <C>       <C>        <C>      <C>       <C>
MO   GTE  D-SHT 27   8      41-50 miles                                    USAGE      Yes       Yes          $0.2000  $0.03   $0.17
MO   GTE  D-SHT 27   8      51-60 miles                                    USAGE      Yes       Yes          $0.2160  $0.03   $0.18
MO   GTE  D-SHT 27   8      61-80 miles                                    USAGE      Yes       Yes          $0.2400  $0.04   $0.20
MO   GTE  D-SHT 27   8      81-100 miles                                   USAGE      Yes       Yes          $0.2480  $0.04   $0.21
MO   GTE  D-SHT 27   8      101-125 miles                                  USAGE      Yes       Yes          $0.2720  $0.04   $0.23
MO   GTE  D-SHT 27   8      126-150 miles                                  USAGE      Yes       Yes          $0.2880  $0.04   $0.24
MO   GTE  D-SHT 27   8      Over 150 miles                                 USAGE      Yes       Yes          $0.2880  $0.04   $0.24
                            NIGHT MESSAGE RATES - Initial 1 Minute
                            (35% Reduction to DAY Rate)
MO   GTE  D-SHT 27   8      1-10 miles                                     USAGE      Yes       Yes          $0.0585  $0.01   $0.05
MO   GTE  D-SHT 27   8      11-14 miles                                    USAGE      Yes       Yes          $0.0780  $0.01   $0.07
MO   GTE  D-SHT 27   8      15-18 miles                                    USAGE      Yes       Yes          $0.1105  $0.02   $0.09
MO   GTE  D-SHT 27   8      19-23 miles                                    USAGE      Yes       Yes          $0.1495  $0.02   $0.13
MO   GTE  D-SHT 27   8      24-28 miles                                    USAGE      Yes       Yes          $0.2340  $0.04   $0.20
MO   GTE  D-SHT 27   8      29-33 miles                                    USAGE      Yes       Yes          $0.2535  $0.04   $0.21
MO   GTE  D-SHT 27   8      34-40 miles                                    USAGE      Yes       Yes          $0.2600  $0.04   $0.22
MO   GTE  D-SHT 27   8      41-50 miles                                    USAGE      Yes       Yes          $0.2730  $0.04   $0.23
MO   GTE  D-SHT 27   8      51-60 miles                                    USAGE      Yes       Yes          $0.2990  $0.05   $0.25
MO   GTE  D-SHT 27   8      61-80 miles                                    USAGE      Yes       Yes          $0.3055  $0.05   $0.26
MO   GTE  D-SHT 27   8      81-100 miles                                   USAGE      Yes       Yes          $0.3120  $0.05   $0.26
MO   GTE  D-SHT 27   8      101-125 miles                                  USAGE      Yes       Yes          $0.3120  $0.05   $0.26
MO   GTE  D-SHT 27   8      126-150 miles                                  USAGE      Yes       Yes          $0.3315  $0.05   $0.28
MO   GTE  D-SHT 27   8      Over 150 miles                                 USAGE      Yes       Yes          $0.3510  $0.05   $0.30
                            NIGHT MESSAGE RATES - Each Additional Minute
                            (35% Reduction to DAY Rates)
MO   GTE  D-SHT 27   8      1-10 miles                                     USAGE      Yes       Yes          $0.0520  $0.01   $0.04
MO   GTE  D-SHT 27   8      11-14 miles                                    USAGE      Yes       Yes          $0.0715  $0.01   $0.06
MO   GTE  D-SHT 27   8      15-18 miles                                    USAGE      Yes       Yes          $0.0910  $0.01   $0.08
MO   GTE  D-SHT 27   8      19-23 miles                                    USAGE      Yes       Yes          $0.1040  $0.02   $0.09
MO   GTE  D-SHT 27   8      24-28 miles                                    USAGE      Yes       Yes          $0.1300  $0.02   $0.11
MO   GTE  D-SHT 27   8      29-33 miles                                    USAGE      Yes       Yes          $0.1430  $0.02   $0.12
MO   GTE  D-SHT 27   8      34-40 miles                                    USAGE      Yes       Yes          $0.1560  $0.02   $0.13
MO   GTE  D-SHT 27   8      41-50 miles                                    USAGE      Yes       Yes          $0.1625  $0.02   $0.14
MO   GTE  D-SHT 27   8      51-60 miles                                    USAGE      Yes       Yes          $0.1755  $0.03   $0.15
MO   GTE  D-SHT 27   8      61-80 miles                                    USAGE      Yes       Yes          $0.1950  $0.03   $0.17
MO   GTE  D-SHT 27   8      81-100 miles                                   USAGE      Yes       Yes          $0.2015  $0.03   $0.17
MO   GTE  D-SHT 27   8      101-125 miles                                  USAGE      Yes       Yes          $0.2210  $0.03   $0.19
MO   GTE  D-SHT 27   8      126-150 miles                                  USAGE      Yes       Yes          $0.2340  $0.04   $0.20
MO   GTE  D-SHT 27   8      Over 150 miles                                 USAGE      Yes       Yes          $0.2340  $0.04   $0.20
                         COMMUNITY OPTIONAL SERVICE (COS) -
                         Two Way Optional Toll
                            Rural
MO   GTE  F-SHT 35   8      Bus                                             MRC       Yes       Yes           $33.50  $5.14  $28.36
MO   GTE  F-SHT 35   8      Res                                             MRC       Yes       Yes           $16.00  $2.45  $13.55
                            Metropolitan - St. Louis/Kansas City
</TABLE>

                                Page 24


<PAGE>   113

                 GTE TELEPHONE OPERATIONS HEADQUARTERS
             RESALE PRODUCTS & SERVICES - STATE OF MISSOURI

<TABLE>
<CAPTION>
                                                                             Billing     Resale   Discount   Retail Avoided Resale
ST  CO    TAR SEC    Rule       Service Description                            Type     Position  Position    Rate   Cost    Rate
<S>  <C>  <C>       <C>     <C>                                               <C>          <C>        <C>   <C>     <C>      <C>
MO   GTE  F-SHT 35   8   Bus                                                   MRC         Yes        Yes   $80.20  $12.29   $67.91
MO   GTE  F-SHT 35   8   Res                                                   MRC         Yes        Yes   $37.80   $5.79   $32.01
                         Metropolitan - Springfield
MO   GTE  F-SHT 35   8   Bus                                                   MRC         Yes        Yes   $50.50   $7.74   $42.76
MO   GTE  F-SHT 35   8   Res                                                   MRC         Yes        Yes   $24.50   $3.76   $20.74
                         Noncontiguous Exhange Additive Charge
MO   GTE  F-SHT 36   8   Bus                                                   MRC         Yes        Yes   $10.85   $1.66    $9.19
MO   GTE  F-SHT 36   8   Res                                                   MRC         Yes        Yes    $5.15   $0.79    $4.36
                         OUTSTATE CALLING AREA (OCA) PLAN (23 Mile Radius)
                         2 Hour Block of Time
MO   GTE  G-SHT 46   8   Bus                                                  USAGE        Yes        Yes   $10.80   $1.66    $9.14
MO   GTE  G-SHT 46   8   Res                                                  USAGE        Yes        Yes    $9.60   $1.47    $8.13
                         5 Hour Block of Time
MO   GTE  G-SHT 46   8   Bus                                                  USAGE        Yes        Yes   $24.50   $3.76   $20.74
MO   GTE  G-SHT 46   8   Res                                                  USAGE        Yes        Yes   $21.85   $3.35   $18.50
                         Each Additional Minute
MO   GTE  G-SHT 46   8   Bus                                                  USAGE        Yes        Yes  $0.0800   $0.01    $0.07
MO   GTE  G-SHT 46   8   Res                                                  USAGE        Yes        Yes  $0.0700   $0.01    $0.06
                         GTE BETWEEN FRIENDS SERVICE
MO   GTE  H-SHT 50   8   One Hour Block of Time Residence                     USAGE        Yes        Yes    $8.00   $1.23    $6.77
MO   GTE  H-SHT 50   8   Each Additional Minute                               USAGE        Yes        Yes  $0.1300   $0.02    $0.11
                         GTE DISCOUNT CALLING PLANS
                         Plan 1 - 15% Discount of IntraLATA Toll
MO   GTE  I-SHT 55   8   Bus                                                   MRC         Yes        Yes    $3.00   $0.46    $2.54
MO   GTE  I-SHT 55   8   Res                                                   MRC         Yes        Yes    $1.00   $0.15    $0.85
                         Plan 2 - 25% Discount of IntraLATA Toll
MO   GTE  I-SHT 55   8   Bus                                                   MRC         Yes        Yes   $10.00   $1.53    $8.47
MO   GTE  I-SHT 55   8   Res                                                   MRC         Yes        Yes    $3.00   $0.46    $2.54
                         WIDE AREA TELECOMMUNICATIONS SERVICE (WATS) -
                         PSC MO. NO. 4
                         GTE MIDWEST INCORPORATED PSC MO. NO. 4
                         800 SERVICE
MO   GTE  D-SHT 17   8   Each IntraLATA Access Line                            MRC         Yes        Yes   $35.50   $5.44   $30.06
MO   GTE  D-SHT 22   0   NRC                                                   NRC         Yes        No   $121.00   N/A    $121.00
                         Business DAY Rates
MO   GTE  D-SHT 20   8   First 9 Hours, each Hour                             USAGE        Yes        Yes   $18.17   $2.79   $15.38
MO   GTE  D-SHT 20   8   Next 9 Hours, each Hour                              USAGE        Yes        Yes   $17.94   $2.75   $15.19
MO   GTE  D-SHT 20   8   Next 17 Hours, each Hour                             USAGE        Yes        Yes   $17.66   $2.71   $14.95
</TABLE>

                                Page 25


<PAGE>   114

                 GTE TELEPHONE OPERATIONS HEADQUARTERS
             RESALE PRODUCTS & SERVICES - STATE OF MISSOURI
<TABLE>
<CAPTION>
                                                                                 Billing   Resale   Discount Retail  Avoided  Resale
ST  CO    TAR SEC    Rule       Service Description                                Type   Position  Position  Rate    Cost     Rate
<S>  <C>  <C>       <C>     <C>                                                    <C>    <C>           <C>   <C>     <C>     <C>
MO   GTE  D-SHT 20   8      Over 35 Hours, each Hour                               USAGE  Yes           Yes   $17.50  $2.68   $14.82
                            EVENING Rates
MO   GTE  D-SHT 20   8      First 9 Hours, each Hour                               USAGE  Yes           Yes   $15.19  $2.33   $12.86
MO   GTE  D-SHT 20   8      Next 9 Hours, each Hour                                USAGE  Yes           Yes   $15.01  $2.30   $12.71
MO   GTE  D-SHT 20   8      Next 17 Hours, each Hour                               USAGE  Yes           Yes   $14.78  $2.27   $12.51
MO   GTE  D-SHT 20   8      Over 35 Hours, each Hour                               USAGE  Yes           Yes   $14.63  $2.24   $12.39
                            NIGHT/WEEKEND Rates
MO   GTE  D-SHT 20   8      First 9 Hours, each Hour                               USAGE  Yes           Yes   $12.50  $1.92   $10.58
MO   GTE  D-SHT 20   8      Next 9 Hours, each Hour                                USAGE  Yes           Yes   $12.36  $1.89   $10.47
MO   GTE  D-SHT 20   8      Next 17 Hours, each Hour                               USAGE  Yes           Yes   $12.15  $1.86   $10.29
MO   GTE  D-SHT 20   8      Over 35 Hours, each Hour                               USAGE  Yes           Yes   $12.04  $1.85   $10.19
                            OUTWARD WATS
MO   GTE  D-SHT 18   8      Each IntraLATA Access Line                              MRC   Yes           Yes   $25.40  $3.89   $21.51
MO   GTE  D-SHT 22   0      NRC                                                     NRC   Yes           No   $106.00   N/A   $106.00
                            Business DAY Rates
MO   GTE  D-SHT 20   8      First 10 Hours, each Hour                              USAGE  Yes           Yes   $18.11  $2.78   $15.33
MO   GTE  D-SHT 20   8      Next 10 Hours, each Hour                               USAGE  Yes           Yes   $16.64  $2.55   $14.09
MO   GTE  D-SHT 20   8      Next 18 Hours, each Hour                               USAGE  Yes           Yes   $16.42  $2.52   $13.90
MO   GTE  D-SHT 20   8      Over 38 Hours, each Hour                               USAGE  Yes           Yes   $14.00  $2.15   $11.85
                            EVENING Rates
MO   GTE  D-SHT 20   8      First 10 Hours, each Hour                              USAGE  Yes           Yes   $15.21  $2.33   $12.88
MO   GTE  D-SHT 20   8      Next 10 Hours, each Hour                               USAGE  Yes           Yes   $13.98  $2.14   $11.84
MO   GTE  D-SHT 20   8      Next 18 Hours, each Hour                               USAGE  Yes           Yes   $13.79  $2.11   $11.68
MO   GTE  D-SHT 20   8      Over 38 Hours, each Hour                               USAGE  Yes           Yes   $11.76  $1.80    $9.96
                            NIGHT/WEEKEND Rates
MO   GTE  D-SHT 20          First 10 Hours, each Hour                              USAGE  Yes           Yes   $12.42  $1.90   $10.52
MO   GTE  D-SHT 20   8      Next 10 Hours, each Hour                               USAGE  Yes           Yes   $11.46  $1.76    $9.70
MO   GTE  D-SHT 20   8      Next 18 Hours, each Hour                               USAGE  Yes           Yes   $11.32  $1.74    $9.58
MO   GTE  D-SHT 20   8      Over 38 Hours, each Hour                               USAGE  Yes           Yes    $9.56  $1.47    $8.09
                         GTE BUSINESS / RESIDENCE LINE 800 SERVICE
                            GTE Business Line 800 Service
MO   GTE  J-SHT 31   8      Each 800 Number terminating on a Business Access Line   MRC   Yes           Yes   $10.00  $1.53    $8.47
MO   GTE  J-SHT 31   0      NRC                                                     NRC   Yes           No    $10.00   N/A    $10.00
MO   GTE  J-SHT 31   0      Each 800 Number Record Changed                          NRC   Yes           No    $10.00   N/A    $10.00
MO   GTE  J-SHT 31   8      Variable Call Destination Rate                          MRC   Yes           Yes    $2.00  $0.31    $1.69
                            IntraLATA Usage Rates - All Times of Day
                            Month-by-Month (no contract)
MO   GTE  J-SHT 32   8      Usage per Hour, 0 to 10 Hours                          USAGE  Yes           Yes   $12.00  $1.84   $10.16
MO   GTE  J-SHT 32   8      Greater than 10 Hours                                  USAGE  Yes           Yes   $11.00  $1.69    $9.31
                            One Year Contract
MO   GTE  J-SHT 32   8      Usage per Hour, 0 to 10 Hours                          USAGE  Yes           Yes   $11.40  $1.75    $9.65
</TABLE>

                                Page 26


<PAGE>   115

                 GTE TELEPHONE OPERATIONS HEADQUARTERS
             RESALE PRODUCTS & SERVICES - STATE OF MISSOURI

<TABLE>
<CAPTION>
                                                                                 Billing  Resale   Discount  Retail  Avoided  Resale
ST  CO    TAR SEC    Rule       Service Description                                 Type  Position  Position   Rate   Cost      Rate
<S>  <C>  <C>       <C>     <C>                                                     <C>    <C>          <C>   <C>     <C>      <C>
MO   GTE  J-SHT 32   8      Greater than 10 hours                                   USAGE  Yes          Yes   $10.45  $1.60    $8.85
                            Two Year Contract
MO   GTE  J-SHT 32   8      Usage per Hour, 0 to 10 Hours                           USAGE  Yes          Yes   $10.83  $1.66    $9.17
MO   GTE  J-SHT 32   8      Greater than 10 Hours                                   USAGE  Yes          Yes    $9.72  $1.49    $8.23
                            Three Year Contract
MO   GTE  J-SHT 32   8      Usage per Hour, 0 to 10 Hours                           USAGE  Yes          Yes   $10.07  $1.54    $8.53
MO   GTE  J-SHT 32   8      Greater than 10 Hours                                   USAGE  Yes          Yes    $9.23  $1.41    $7.82
                            GTE Residence Line 800 Service
MO   GTE  J-SHT 31   8      Each 800 Number terminating on a 
                            Residence Access Line                                    MRC   Yes          Yes   $10.00  $1.53    $8.47
MO   GTE  J-SHT 31   0      NRC                                                      NRC   Yes          No    $10.00   N/A    $10.00
MO   GTE  J-SHT 31   0      Each 800 Number Record Changed                           NRC   Yes          No    $10.00   N/A    $10.00
MO   GTE  J-SHT 31   8      Variable Call Destination Rate                           MRC   Yes          Yes    $2.00  $0.31    $1.69
                            IntraLATA Usage Rates - All Times of Day
                            Month-by-Month (no contract)
MO   GTE  J-SHT 32   8      Usage per Hour, 0 to 10 Hours                           USAGE  Yes          Yes   $12.00  $1.84   $10.16
MO   GTE  J-SHT 32   8      Greater than 10 Hours                                   USAGE  Yes          Yes   $11.00  $1.69    $9.31
                            One Year Contract
MO   GTE  J-SHT 32   8      Usage per Hour, 0 to 10 Hours                           USAGE  Yes          Yes   $11.40  $1.75    $9.65
MO   GTE  J-SHT 32   8      Greater than 10 Hours                                   USAGE  Yes          Yes   $10.45  $1.60    $8.85
                            Two Year Contract
MO   GTE  J-SHT 32   8      Usage per Hour, 0 to 10 Hours                           USAGE  Yes          Yes   $10.83  $1.66    $9.17
MO   GTE  J-SHT 32   8      Greater than 10 Hours                                   USAGE  Yes          Yes    $9.72  $1.49    $8.23
                            Three Year Contract
MO   GTE  J-SHT 32   8      Usage per Hour, 0 to 10 Hours                           USAGE  Yes          Yes   $10.07  $1.54    $8.53
MO   GTE  J-SHT 32   8      Greater than 10 Hours                                   USAGE  Yes          Yes    $9.23  $1.41    $7.82
                         INTRASTATE SPECIAL ACCESS SERVICES
                            GTE MIDWEST INCORPORATED PSC MO. NO. 2
MO   GTE  5.6.9      0      SPECIAL ACCESS SURCHARGE                                 MRC   Yes          No    $25.00   N/A    $25.00
                                                                                                                       N/A
                            VOICEBAND FACILITIES                                                                       N/A
MO   GTE  5.7.2(A)   0      Special Transport, 2-Wire and 4-Wire - 
                            Per Mile                                                 MRC   Yes          No     $5.19   N/A     $5.19
MO   GTE  5.7.2(A)   0      Special Access Line - Two Wire                           MRC   Yes          No    $30.00   N/A    $30.00
MO   GTE  5.7.2(A)   0      Special Access Line - Four Wire                          MRC   Yes          No    $58.20   N/A    $58.20
MO   GTE  5.7.2(A)   0      NRC 2-Wire and 4-Wire SAL                                NRC   Yes          No   $200.00   N/A   $200.00
                            Optional Arrangements                                                                      N/A
                            Multipoint Data Bridging                                                                   N/A
MO   GTE  5.7.2(B)   0      MRC                                                      MRC   Yes          No     $8.00   N/A     $8.00
                            Voice Conference Bridging                                                                  N/A
MO   GTE  5.7.2(B)   0      MRC                                                      MRC   Yes          No     $8.00   N/A     $8.00
                            Alarm Distribution Bridging Common Equipment                                               N/A
</TABLE>

                                Page 27


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             RESALE PRODUCTS & SERVICES - STATE OF MISSOURI




<TABLE>
<CAPTION>
                                                                     Billing  Resale        Discount Retail Avoided Resale
ST  CO    TAR SEC    Rule       Service Description                    Type  Position       Position  Rate   Cost    Rate
<S>  <C>  <C>       <C>     <C>                                         <C>  <C>                <C>   <C>      <C>   <C>
MO   GTE  5.7.2(B)   0   MRC                                            MRC  Yes                No    $30.00  N/A   $30.00
                         Alarm Distribution Bridging Per Two-Wire Port                                        N/A
MO   GTE  5.7.2(B)   0   MRC                                            MRC  Yes                No     $2.00  N/A    $2.00
                         Conditioning Arrangements-Data Type C                                                N/A
MO   GTE  5.7.2(B)   0   MRC                                            MRC  Yes                No    $11.86  N/A   $11.86
                         Conditioning Arrangements-Data Type DA                                               N/A
MO   GTE  5.7.2(B)   0   MRC                                            MRC  Yes                No     $2.00  N/A    $2.00
                         Conditioning Arrangements-Data Type C Improv                                         N/A
MO   GTE  5.7.2(B)   0   MRC                                            MRC  Yes                No    $30.00  N/A   $30.00
MO   GTE  5.7.2(B)   0   NRC                                            NRC  Yes                No     $3.00  N/A    $3.00
                         Loop Signaling Range Extension, Per SAL                                              N/A
MO   GTE  5.7.2(B)   0   MRC                                            MRC  Yes                No    $10.00  N/A   $10.00
                         Loop or E&M to SF, Per SAL                                                           N/A
MO   GTE  5.7.2(B)   0   MRC                                            MRC  Yes                No    $16.00  N/A   $16.00
                         E&M to DX, Per SAL                                                                   N/A
MO   GTE  5.7.2(B)   0   MRC                                            MRC  Yes                No    $14.00  N/A   $14.00
                         E&M to Loop, Per SAL                                                                 N/A
MO   GTE  5.7.2(B)   0   MRC                                            MRC  Yes                No    $12.00  N/A   $12.00
                         Loop or E&M to PCM, Per SAL                                                          N/A
MO   GTE  5.7.2(B)   0   MRC                                            MRC  Yes                No     $4.00  N/A    $4.00
                         Automatic Ringdown, Per SAL                                                          N/A
MO   GTE  5.7.2(B)   0   MRC                                            MRC  Yes                No    $16.78  N/A   $16.78
                         Echo Suppression, Per Circuit                                                        N/A
MO   GTE  5.7.2(B)   0   MRC                                            MRC  Yes                No    $30.00  N/A   $30.00
                         Echo Canceller, Per Circuit                                                          N/A
MO   GTE  5.7.2(B)   0   MRC                                            MRC  Yes                No    $85.00  N/A   $85.00
                         Voiceband Facility Switching Arrangement                                             N/A
MO   GTE  5.7.2(B)   0   MRC                                            MRC  Yes                No     $7.00  N/A    $7.00
                         Improved Return Loss                                                                 N/A
MO   GTE  5.7.2(B)   0   MRC                                            MRC  Yes                No     $3.75  N/A    $3.75
                         Improved Termination Option                                                          N/A
MO   GTE  5.7.2(B)   0   MRC                                            MRC  Yes                No    $10.00  N/A   $10.00
                         Improved Echo Level Echo Path Loss/SAL
MO   GTE  5.7.2(B)   0   MRC                                            MRC  Yes                No     $3.75  N/A    $3.75
                         PROGRAM AUDIO (200-3500HZ) FACILITIES
                         Special Transport, Per Airline Mile
MO   GTE  5.7.3(A)   0   MRC                                            MRC  Yes                No     $5.02  N/A    $5.02
MO   GTE  5.7.3(A)   0   Daily Rate                                     DRC  Yes                No     $0.50  N/A    $0.50
                         Special Access Line                                                                  N/A
MO   GTE  5.7.3(A)   0   MRC                                            MRC  Yes                No    $30.00  N/A   $30.00
MO   GTE  5.7.3(A)   0   Daily Rate                                     DRC  Yes                No     $3.00  N/A    $3.00
MO   GTE  5.7.3(A)   0   NRC                                            NRC  Yes                No   $200.00  N/A  $200.00
</TABLE>

                                Page 28


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             RESALE PRODUCTS & SERVICES - STATE OF MISSOURI



<TABLE>
<CAPTION>
                                                                            Billing  Resale  Discount Retail Avoided  Resale
ST  CO    TAR SEC    Rule       Service Description                          Type   Position Position  Rate   Cost    Rate
<S>  <C>  <C>       <C>     <C>                                              <C>     <C>       <C>     <C>    <C>    <C>
                                                                                                              N/A
                         PROGRAM AUDIO (100-5000HZ) FACILITIES                                                N/A
                         Special Transport, Per Airline Mile                                                  N/A
MO   GTE  5.7.3(B)   0   MRC                                                  MRC  Yes          No    $59.68  N/A   $59.68
MO   GTE  5.7.3(B)   0   Daily Rate                                           DRC  Yes          No     $5.97  N/A    $5.97
                         Special Access Line                                                                  N/A
MO   GTE  5.7.3(B)   0   MRC                                                  MRC  Yes          No    $41.00  N/A   $41.00
MO   GTE  5.7.3(B)   0   Daily Rate                                           DRC  Yes          No     $4.10  N/A    $4.10
MO   GTE  5.7.3(B)   0   NRC                                                  NRC  Yes          No   $200.00  N/A  $200.00
                                                                                                              N/A
                         PROGRAM AUDIO (50-8000HZ) FACILITIES                                                 N/A
                         Special Transport, Per Airline Mile                                                  N/A
MO   GTE  5.7.3(C)   0   MRC                                                  MRC  Yes          No    $74.65  N/A   $74.65
MO   GTE  5.7.3(C)   0   Daily Rate                                           DRC  Yes          No     $7.47  N/A    $7.47
                         Special Access Line                                                                  N/A
MO   GTE  5.7.3(C)   0   MRC                                                  MRC  Yes          No    $42.00  N/A   $42.00
MO   GTE  5.7.3(C)   0   Daily Rate                                           DRC  Yes          No     $4.20  N/A    $4.20
MO   GTE  5.7.3(C)   0   NRC                                                  NRC  Yes          No   $200.00  N/A  $200.00
                                                                                                              N/A
                         PROGRAM AUDIO (50-15000HZ) FACILITIES                                                N/A
                         Special Transport, Per Airline Mile                                                  N/A
MO   GTE  5.7.3(D)   0   MRC                                                  MRC  Yes          No    $89.61  N/A   $89.61
MO   GTE  5.7.3(D)   0   Daily Rate                                           DRC  Yes          No     $8.96  N/A    $8.96
                         Special Access Line                                                                  N/A
MO   GTE  5.7.3(D)   0   MRC                                                  MRC  Yes          No    $60.42  N/A   $60.42
MO   GTE  5.7.3(D)   0   Daily Rate                                           DRC  Yes          No     $6.04  N/A    $6.04
MO   GTE  5.7.3(D)   0   NRC                                                  NRC  Yes          No   $200.00  N/A  $200.00
                                                                                                              N/A
                         PROGRAM AUDIO Optional Arrangements                                                  N/A
                         Program Audio Bridging, Per Port - All Bandwidths                                    N/A
MO   GTE  5.7.3(F)   0   MRC                                                  MRC  Yes          No    $19.15  N/A   $19.15
MO   GTE  5.7.3(F)   0   Daily Rate                                           DRC  Yes          No     $1.92  N/A    $1.92
                         Conditioning-Zero Loss, Per SAL - All Bandwidths                                     N/A
MO   GTE  5.7.3(F)   0   MRC                                                  MRC  Yes          No    $15.72  N/A   $15.72
MO   GTE  5.7.3(F)   0   Daily Rate                                           DRC  Yes          No     $1.57  N/A    $1.57
                         Conditioning-Stereo Conditioning - 50-15000 Hz Only                                  N/A
MO   GTE  5.7.3(E)   0   MRC                                                  MRC  Yes          No     $1.31  N/A    $1.31
MO   GTE  5.7.3(E)   0   Daily Rate                                           DRC  Yes          No     $0.13  N/A    $0.13
                                                                                                              N/A
                         DIGITAL DATA (2.4, 4.8, 9.6 56 KBPS) FACILITIES                                      N/A
                         Special Transport, Per Airline Mile - All Speeds                                     N/A
MO   GTE  5.7.5(A)   0   MRC                                                  MRC  Yes          No    $11.50  N/A   $11.50
                         Special Access Line - 2.4, 4.8, 9.6 Kbps                                             N/A
</TABLE>

                                Page 29



<PAGE>   118

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             RESALE PRODUCTS & SERVICES - STATE OF MISSOURI




<TABLE>
<CAPTION>
                                                                     Billing  Resale   Discount Retail Avoided   Resale
ST  CO    TAR SEC    Rule       Service Description                   Type   Position  Position  Rate   Cost      Rate
<S>  <C>  <C>       <C>     <C>                                         <C>  <C>       <C>       <C>    <C>     <C>
MO   GTE  5.7.5(A)   0   MRC                                            MRC  Yes        No      $73.50  N/A     $73.50
                         Special Access Line - 56 Kbps                                                  N/A
MO   GTE  5.7.5(A)   0   MRC                                            MRC  Yes        No      $83.00  N/A     $83.00
MO   GTE  5.7.5(A)   0   NRC - All Speeds                               NRC  Yes        No     $250.00  N/A    $250.00
                         DDS Bridging                                                                   N/A
MO   GTE  5.7.5(B)   0   MRC                                            MRC  Yes        No      $11.00  N/A     $11.00
                                                                                                        N/A
                         MULTIPLEXING ARRANGEMENTS                                                      N/A
                         DS1 to Voice                                                                   N/A
MO   GTE  5.7.6      0   NRC                                            NRC  Yes        No     $800.00  N/A    $800.00
MO   GTE  5.7.6      0   MRC                                            MRC  Yes        No     $184.00  N/A    $184.00
                         Digital Data Carrier Multiplexer-Common Equip                                  N/A
MO   GTE  5.7.6      0   NRC                                            NRC  Yes        No   $1,500.00  N/A  $1,500.00
MO   GTE  5.7.6      0   MRC                                            MRC  Yes        No     $550.00  N/A    $550.00
                         Digital Data Subrate Multiplexer                                               N/A
                         One 64 KBPS to Twenty 2.4 KBPS                                                 N/A
MO   GTE  5.7.6      0   NRC                                            NRC  Yes        No     $800.00  N/A    $800.00
MO   GTE  5.7.6      0   MRC                                            MRC  Yes        No     $160.00  N/A    $160.00
                         One 64 KBPS to Ten 4.8 KBPS                                                    N/A
MO   GTE  5.7.6      0   NRC                                            NRC  Yes        No     $800.00  N/A    $800.00
MO   GTE  5.7.6      0   MRC                                            MRC  Yes        No     $120.00  N/A    $120.00
                         One 64 KBPS to Five 9.6 KBPS                                                   N/A
MO   GTE  5.7.6      0   NRC                                            NRC  Yes        No     $800.00  N/A    $800.00
MO   GTE  5.7.6      0   MRC                                            MRC  Yes        No     $100.00  N/A    $100.00
                                                                                                        N/A
                         HIGH CAP DIGITAL DS1 (1.544 MBPS) FACILITIES                                   N/A
                         Special Access Line - First System                                             N/A
MO   GTE  5.7.7(A)   0   NRC                                            NRC  Yes        No     $900.00  N/A    $900.00
MO   GTE  5.7.7(A)   0   MRC                                            MRC  Yes        No     $295.00  N/A    $295.00
                         Special Access Line - Each Add'l System                                        N/A
MO   GTE  5.7.7(A)   0   NRC                                            NRC  Yes        No     $130.00  N/A    $130.00
MO   GTE  5.7.7(A)   0   MRC                                            MRC  Yes        No     $150.00  N/A    $150.00
                         Special Transport                                                              N/A
MO   GTE  5.7.7(A)   0   Fixed - Monthly                                MRC  Yes        No      $30.00  N/A     $30.00
MO   GTE  5.7.7(A)   0   Per Mile - Monthly                             MRC  Yes        No      $21.60  N/A     $21.60
                         OPTIONAL ARRANGEMENT                                                           N/A
                         Automatic Protection Switching                                                 N/A
MO   GTE  5.7.7(B)   0   NRC                                            NRC  Yes        No     $700.00  N/A    $700.00
MO   GTE  5.7.7(B)   0   MRC                                            MRC  Yes        No     $100.00  N/A    $100.00
                         METROLAN SPECIAL TRANSPORT
MO   GTE  5.7.7(B)   0   MRC                                            MRC  Yes        No      $75.00  N/A     $75.00
</TABLE>

                                Page 30

<PAGE>   119



                 GTE TELEPHONE OPERATIONS HEADQUARTERS
             RESALE PRODUCTS & SERVICES - STATE OF MISSOURI


<TABLE>
<CAPTION>
                                                                        Billing  Resale    Discount  Retail  Avoided  Resale
ST  CO    TAR SEC    Rule       Service Description                       Type  Position   Position   Rate    Cost   Rate
<S>  <C>  <C>       <C>     <C>                                            <C>  <C>            <C>   <C>       <C>   <C>
                         NONRECURRING CHARGES
MO   GTE  5.7.1      0   Sp Acc Ordering Charge - Initial, per order       NRC  Yes             No   $116.24   N/A   $116.24
MO   GTE  5.7.1      0   Sp Acc Ordering Charge - Subsequent, per order    NRC  Yes             No    $85.85   N/A    $85.85
MO   GTE  5.7.1      0   Design Change Charge, per order                   NRC  Yes             No    $27.00   N/A    $27.00
                         INTRALATA PRIVATE LINE AND DIGITAL DATA SERVICES
                         GTE MIDWEST INCORPORATED PSC MO. NO. 5
                         SERIES 100 METALLIC SERVICE
                         Type 102 -
                         Local Channel
MO   GTE  C-SHT 54   0   MRC                                               MRC  Yes             Yes   $17.65  $0.00   $17.65
MO   GTE  C-SHT 54   0   NRC                                               NRC  Yes             No   $240.00   N/A   $240.00
                         Interoffice Channel Terminal                                                          N/A
MO   GTE  C-SHT 54   0   MRC                                               MRC  Yes             Yes   $11.10  $0.00   $11.10
                         Interexchange Channel Mileage                                                         N/A
MO   GTE  C-SHT 54   0   MRC                                               MRC  Yes             Yes    $0.50  $0.00    $0.50
                         Interexchange Channel Terminal                                                        N/A
MO   GTE  C-SHT 55   0   MRC                                               MRC  Yes             Yes   $33.65  $0.00   $33.65
                         Interexchange Channel Mileage                                                         N/A
MO   GTE  C-SHT 55   0   MRC 0-250 Miles                                   MRC  Yes             Yes    $3.65  $0.00    $3.65
MO   GTE  C-SHT 55   0   MRC Over 250 Miles                                MRC  Yes             Yes    $1.00  $0.00    $1.00
                                                                                                               N/A
                         SERIES 200 TELEGRAPH SERVICE                                                          N/A
                         Type 250 -                                                                            N/A
                         Local Channel                                                                         N/A
MO   GTE  C-SHT 58   0   MRC - Half Duplex                                 MRC  Yes             Yes   $23.65  $0.00   $23.65
MO   GTE  C-SHT 58   0   MRC - Full Duplex                                 MRC  Yes             Yes   $41.20  $0.00   $41.20
MO   GTE  C-SHT 58   0   NRC                                               MRC  Yes             No   $300.00   N/A   $300.00
                         Interoffice Channel Terminal                                                          N/A
MO   GTE  C-SHT 59   0   MRC - Half Duplex                                 MRC  Yes             Yes    $7.00  $0.00    $7.00
MO   GTE  C-SHT 59   0   MRC - Full Duplex                                 MRC  Yes             Yes    $7.00  $0.00    $7.00
                         Interoffice Channel Mileage                                                            N/A
MO   GTE  C-SHT 58   0   MRC - Half Duplex                                 MRC  Yes             Yes    $3.80  $0.00    $3.80
MO   GTE  C-SHT 58   0   MRC - Full Duplex                                 MRC  Yes             Yes    $6.75  $0.00    $6.75
                         Interexchange Channel Terminal                                                        N/A
MO   GTE  C-SHT 60   0   MRC - Half Duplex                                 MRC  Yes             Yes   $40.85  $0.00   $40.85
MO   GTE  C-SHT 60   0   MRC - Full Duplex                                 MRC  Yes             Yes   $41.75  $0.00   $41.75
                         Interexchange Channel Mileage                                                         N/A
MO   GTE  C-SHT 59   0   MRC - Half Duplex 0-250 miles                     MRC  Yes             Yes    $1.80  $0.00    $1.80
MO   GTE  C-SHT 59   0   MRC - Half Duplex Over 250 mi                     MRC  Yes             Yes    $0.90  $0.00    $0.90
MO   GTE  C-SHT 59   0   MRC - Full Duplex 0-250 miles                     MRC  Yes             Yes    $1.80  $0.00    $1.80
MO   GTE  C-SHT 59   0   MRC - Full Duplex Over 250 mi                     MRC  Yes             Yes    $0.90  $0.00    $0.90
</TABLE>

                                Page 31

<PAGE>   120

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             RESALE PRODUCTS & SERVICES - STATE OF MISSOURI




<TABLE>
<CAPTION>
                                                             Billing Resale   Discount  Retail Avoided  Resale
ST  CO    TAR SEC    Rule       Service Description            Type  Position  Position  Rate   Cost    Rate
<S>  <C>  <C>       <C>     <C>                                <C>  <C>         <C>      <C>   <C>    <C>
                         Type 251 -                                                            N/A
                         Local Channel                                                         N/A
MO   GTE  C-SHT 58   0   MRC - Half Duplex                     MRC  Yes         Yes   $43.85  $0.00   $43.85
MO   GTE  C-SHT 58   0   MRC - Full Duplex                     MRC  Yes         Yes   $59.90  $0.00   $59.90
MO   GTE  C-SHT 58   0   NRC                                   NRC  Yes         No   $300.00   N/A   $300.00
                         Interoffice Channel Terminal                                          N/A
MO   GTE  C-SHT 59   0   MRC - Half Duplex                     MRC  Yes         Yes    $3.45  $0.00    $3.45
MO   GTE  C-SHT 59   0   MRC - Full Duplex                     MRC  Yes         Yes    $3.45  $0.00    $3.45
                         Interoffice Channel Mileage                                           N/A
MO   GTE  C-SHT 58   0   MRC - Half Duplex                     MRC  Yes         Yes    $3.80  $0.00    $3.80
MO   GTE  C-SHT 58   0   MRC - Full Duplex                     MRC  Yes         Yes    $6.75  $0.00    $6.75
                         Interexchange Channel Terminal                                        N/A
MO   GTE  C-SHT 60   0   MRC - Half Duplex                     MRC  Yes         Yes   $38.15  $0.00   $38.15
MO   GTE  C-SHT 60   0   MRC - Full Duplex                     MRC  Yes         Yes   $38.15  $0.00   $38.15
                         Interexchange Channel Mileage                                         N/A
MO   GTE  C-SHT 59   0   MRC - Half Duplex 0-250 miles         MRC  Yes         Yes    $2.45  $0.00    $2.45
MO   GTE  C-SHT 59   0   MRC - Half Duplex Over 250 miles      MRC  Yes         Yes    $1.50  $0.00    $1.50
MO   GTE  C-SHT 59   0   MRC - Full Duplex 0-250 miles         MRC  Yes         Yes    $2.45  $0.00    $2.45
MO   GTE  C-SHT 59   0   MRC - Full Duplex Over 250 mi         MRC  Yes         Yes    $1.50  $0.00    $1.50
                                                                                               N/A
                         SERIES 300 AND 400 VOICEBAND SERVICE                                  N/A
                         Local Channel                                                         N/A
                         Type 311                                                              N/A
MO   GTE  C-SHT 71   0   MRC                                   MRC  Yes         Yes   $39.40  $0.00   $39.40
MO   GTE  C-SHT 71   0   NRC                                   NRC  Yes         Yes  $280.00  $0.00  $280.00
                         Type 312                                                              N/A
MO   GTE  C-SHT 71   0   MRC                                   MRC  Yes         Yes   $61.25  $0.00   $61.25
MO   GTE  C-SHT 71   0   NRC                                   NRC  Yes         No   $270.00   N/A   $270.00
                         Type 314A                                                             N/A
MO   GTE  C-SHT 71   0   MRC                                   MRC  Yes         Yes   $83.35  $0.00   $83.35
MO   GTE  C-SHT 71   0   NRC                                   NRC  Yes         No   $340.00   N/A   $340.00
                         Type 320                                                              N/A
MO   GTE  C-SHT 71   0   MRC                                   MRC  Yes         Yes   $66.40  $0.00   $66.40
MO   GTE  C-SHT 71   0   NRC                                   NRC  Yes         No   $270.00   N/A   $270.00
                         Type 414B                                                             N/A
MO   GTE  C-SHT 71   0   MRC                                   MRC  Yes         Yes   $96.30  $0.00   $96.30
MO   GTE  C-SHT 71   0   NRC                                   NRC  Yes         No   $560.00   N/A   $560.00
                         Type 414C                                                             N/A
MO   GTE  C-SHT 71   0   MRC                                   MRC  Yes         Yes   $55.85  $0.00   $55.85
MO   GTE  C-SHT 71   0   NRC                                   NRC  Yes         No   $440.00   N/A   $440.00
                         Type 415                                                              N/A
MO   GTE  C-SHT 71   0   MRC                                   MRC  Yes         Yes   $38.90  $0.00   $38.90
MO   GTE  C-SHT 71   0   NRC                                   NRC  Yes         No   $200.00   N/A   $200.00
</TABLE>

                                Page 32


<PAGE>   121


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             RESALE PRODUCTS & SERVICES - STATE OF MISSOURI



<TABLE>
<CAPTION>
                                                          Billing  Resale   Discount  Retail  Avoided Resale
ST  CO    TAR SEC    Rule       Service Description         Type   Position  Position   Rate  Cost    Rate
<S>  <C>  <C>       <C>     <C>                              <C>  <C>          <C>     <C>    <C>     <C>
                         Type 417A                                                             N/A
MO   GTE  C-SHT 71   0   MRC                                 MRC  Yes           Yes   $98.30  $0.00   $98.30
MO   GTE  C-SHT 71   0   NRC                                 NRC  Yes           No   $410.00   N/A   $410.00
                         Type 417B                                                             N/A
MO   GTE  C-SHT 71   0   MRC                                 MRC  Yes           Yes   $98.30  $0.00   $98.30
MO   GTE  C-SHT 71   0   NRC                                 NRC  Yes           No   $410.00   N/A   $410.00
                         Type 420                                                              N/A
MO   GTE  C-SHT 71   0   MRC                                 MRC  Yes           Yes   $63.45  $0.00   $63.45
MO   GTE  C-SHT 71   0   NRC                                 NRC  Yes           No   $290.00   N/A   $290.00
                         Type 422                                                              N/A
MO   GTE  C-SHT 71   0   MRC                                 MRC  Yes           Yes   $63.45  $0.00   $63.45
MO   GTE  C-SHT 71   0   NRC                                 NRC  Yes           No   $290.00   N/A   $290.00
                         Type 423                                                              N/A
MO   GTE  C-SHT 71   0   MRC                                 MRC  Yes           Yes   $32.95  $0.00   $32.95
MO   GTE  C-SHT 71   0   NRC                                 NRC  Yes           No   $280.00   N/A   $280.00
                         Type 424                                                     N/A
MO   GTE  C-SHT 71   0   MRC                                 MRC  Yes           Yes   $61.70  $0.00   $61.70
MO   GTE  C-SHT 71   0   NRC                                 NRC  Yes           No   $340.00   N/A   $340.00
                         Type 425                                                              N/A
MO   GTE  C-SHT 71   0   MRC                                 MRC  Yes           Yes   $45.85  $0.00   $45.85
MO   GTE  C-SHT 71   0   NRC                                 NRC  Yes           No   $270.00   N/A   $270.00
                         Type 428                                                              N/A
MO   GTE  C-SHT 71   0   MRC                                 MRC  Yes           Yes   $43.55  $0.00   $43.55
MO   GTE  C-SHT 71   0   NRC                                 NRC  Yes           No   $270.00   N/A   $270.00
                         Type 432                                                              N/A
MO   GTE  C-SHT 71   0   MRC                                 MRC  Yes           Yes   $49.70  $0.00   $49.70
MO   GTE  C-SHT 71   0   NRC                                 NRC  Yes           No   $500.00   N/A   $500.00
                         Type 435                                                              N/A
MO   GTE  C-SHT 71   0   MRC                                 MRC  Yes           Yes   $66.40  $0.00   $66.40
MO   GTE  C-SHT 71   0   NRC                                 NRC  Yes           No   $250.00   N/A   $250.00
                         Interoffice Channel Terminal - All                                    N/A
MO   GTE  C-SHT 72   0   MRC                                 MRC  Yes           Yes    $4.35  $0.00    $4.35
                         Interoffice Channel Mileage - All                                     N/A
MO   GTE  C-SHT 72   0   MRC                                 MRC  Yes           Yes    $7.55  $0.00    $7.55
                         Interexchange Channel Terminal                                        N/A
MO   GTE  C-SHT 73   0   Type 311 - MRC                      MRC  Yes           Yes   $27.90  $0.00   $27.90
MO   GTE  C-SHT 73   0   Type 312 - MRC                      MRC  Yes           Yes   $27.90  $0.00   $27.90
MO   GTE  C-SHT 73   0   Type 314A - MRC                     MRC  Yes           Yes   $27.90  $0.00   $27.90
MO   GTE  C-SHT 73   0   Type 320 - MRC                      MRC  Yes           Yes   $27.90  $0.00   $27.90
MO   GTE  C-SHT 73   0   Type 414B - MRC                     MRC  Yes           Yes   $27.90  $0.00   $27.90
MO   GTE  C-SHT 73   0   Type 414C - MRC                     MRC  Yes           Yes   $27.90  $0.00   $27.90
MO   GTE  C-SHT 73   0   Type 415 - MRC                      MRC  Yes           Yes   $27.90  $0.00   $27.90
MO   GTE  C-SHT 73   0   Type 417A - MRC                     MRC  Yes           Yes   $27.90  $0.00   $27.90
</TABLE>

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             RESALE PRODUCTS & SERVICES - STATE OF MISSOURI



<TABLE>
<CAPTION>
                                                            Billing Resale   Discount Retail  Avoided Resale
ST  CO    TAR SEC    Rule       Service Description           Type  Position Position Rate    Cost    Rate
<S>  <C>  <C>       <C>     <C>                                <C>  <C>        <C>    <C>     <C>     <C>
MO   GTE  C-SHT 73   0   Type 417B - MRC                       MRC  Yes         Yes   $27.90  $0.00   $27.90
MO   GTE  C-SHT 73   0   Type 420 - MRC                        MRC  Yes         Yes   $27.90  $0.00   $27.90
MO   GTE  C-SHT 73   0   Type 422 - MRC                        MRC  Yes         Yes   $27.90  $0.00   $27.90
MO   GTE  C-SHT 73   0   Type 423 - MRC                        MRC  Yes         Yes   $27.90  $0.00   $27.90
MO   GTE  C-SHT 73   0   Type 424 - MRC                        MRC  Yes         Yes   $27.90  $0.00   $27.90
MO   GTE  C-SHT 73   0   Type 425 - MRC                        MRC  Yes         Yes   $27.90  $0.00   $27.90
MO   GTE  C-SHT 73   0   Type 428 - MRC                        MRC  Yes         Yes   $27.90  $0.00   $27.90
MO   GTE  C-SHT 73   0   Type 432 - MRC                        MRC  Yes         Yes   $31.90  $0.00   $31.90
MO   GTE  C-SHT 73   0   Type 435 - MRC                        MRC  Yes         Yes   $27.90  $0.00   $27.90
MO   GTE  C-SHT 73   0   Foreign Exchange - MRC                MRC  Yes         Yes   $27.90  $0.00   $27.90
                         Interexchange Channel Mileage - All                                   N/A
MO   GTE  C-SHT 72   0   MRC 0-250 miles                       MRC  Yes         Yes    $4.10  $0.00    $4.10
MO   GTE  C-SHT 72   0   MRC Over 250 miles                    NRC  Yes         No     $1.05   N/A     $1.05
                         Business Extension Line                                               N/A
MO   GTE  C-SHT 74   0   MRC                                   MRC  Yes         Yes    $4.50  $0.00    $4.50
                         Bridging Charge                                                       N/A
MO   GTE  C-SHT 75   0   MRC                                   MRC  Yes         Yes    $7.55  $0.00    $7.55
                         Foreign Exchange Service                                              N/A
                         Point of Termination in one fx                                        N/A
MO   GTE  C-SHT 79   0   MRC 0-20 miles apart                  MRC  Yes         Yes   $61.10  $0.00   $61.10
MO   GTE  C-SHT 79   0   MRC over 20 miles apart               MRC  Yes         Yes   $70.70  $0.00   $70.70
MO   GTE  C-SHT 79   0   NRC                                   NRC  Yes         No   $410.00   N/A   $410.00
                         Point of Termination in two fx's                                      N/A
MO   GTE  C-SHT 79   0   MRC                                   MRC  Yes         Yes  $109.95  $0.00  $109.95
MO   GTE  C-SHT 79   0   NRC                                   NRC  Yes         No   $410.00   N/A   $410.00
                         Four-Wire Access Service Arrangement                                  N/A
                         FX or FSO Four-Wire Service Access                                    N/A
MO   GTE  C-SHT 81   0   MRC                                   MRC  Yes         Yes   $33.80  $0.00   $33.80
MO   GTE  C-SHT 81   0   NRC                                   NRC  Yes         No    $26.90   N/A    $26.90
                         Signaling Options                                                     N/A
                         Manual                                                                N/A
MO   GTE  C-SHT 89   0   MRC                                   MRC  Yes         Yes   $26.25  $0.00   $26.25
MO   GTE  C-SHT 89   0   NRC                                   NRC  Yes         No    $65.00   N/A    $65.00
                         Automatic                                                             N/A
MO   GTE  C-SHT 89   0   MRC                                   MRC  Yes         Yes   $27.90  $0.00   $27.90
MO   GTE  C-SHT 89   0   NRC                                   NRC  Yes         No    $65.00   N/A    $65.00
                         Arranged for E & M Type Signaling                                     N/A
                         Type 420                                                              N/A
MO   GTE  C-SHT 89   0   MRC                                   MRC  Yes         Yes   $20.25  $0.00   $20.25
MO   GTE  C-SHT 89   0   NRC                                   NRC  Yes         No    $65.00   N/A    $65.00
                         Type 422                                                              N/A
MO   GTE  C-SHT 89   0   MRC                                   MRC  Yes         Yes   $20.25  $0.00   $20.25
MO   GTE  C-SHT 89   0   NRC                                   NRC  Yes         No    $65.00   N/A    $65.00
</TABLE>

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             RESALE PRODUCTS & SERVICES - STATE OF MISSOURI



<TABLE>
<CAPTION>
                                                             Billing  Resale   Discount   Retail Avoided   Resale
ST  CO    TAR SEC    Rule       Service Description            Type   Position  Position    Rate  Cost      Rate
<S>  <C>  <C>       <C>     <C>                                 <C>  <C>       <C>        <C>      <C>    <C>
                         Type 423                                                                   N/A
MO   GTE  C-SHT 89   0   MRC                                    MRC  Yes        Yes        $21.30  $0.00  $21.30
MO   GTE  C-SHT 89   0   NRC                                    NRC  Yes        No         $65.00   N/A   $65.00
                         Type 424                                                                   N/A
MO   GTE  C-SHT 89   0   MRC                                    MRC  Yes        Yes        $21.60  $0.00  $21.60
MO   GTE  C-SHT 89   0   NRC                                    NRC  Yes        No         $65.00   N/A   $65.00
                         Type 425                                                                   N/A
MO   GTE  C-SHT 89   0   MRC                                    MRC  Yes        Yes        $21.60  $0.00  $21.60
MO   GTE  C-SHT 89   0   NRC                                    NRC  Yes        No         $65.00   N/A   $65.00
                         Type 428                                                                   N/A
MO   GTE  C-SHT 89   0   MRC                                    MRC  Yes        Yes        $21.60  $0.00  $21.60
MO   GTE  C-SHT 89   0   NRC                                    NRC  Yes        No         $65.00   N/A   $65.00
                         Arranged for Loop Signaling                                                N/A
                         Type 420                                                                   N/A
MO   GTE  C-SHT 90   0   MRC                                    MRC  Yes        Yes        $33.25  $0.00  $33.25
MO   GTE  C-SHT 90   0   NRC                                    NRC  Yes        No         $65.00   N/A   $65.00
                         Type 422                                                                   N/A
MO   GTE  C-SHT 90   0   MRC                                    MRC  Yes        Yes        $33.25  $0.00  $33.25
MO   GTE  C-SHT 90   0   NRC                                    NRC  Yes        No         $65.00   N/A   $65.00
                         Type 423                                                                   N/A
MO   GTE  C-SHT 90   0   MRC                                    MRC  Yes        Yes        $34.15  $0.00  $34.15
MO   GTE  C-SHT 90   0   NRC                                    NRC  Yes        No         $65.00   N/A   $65.00
                         Arranged for Loop Signaling                                                N/A
                         Type 428                                                                   N/A
MO   GTE  C-SHT 90   0   MRC                                    MRC  Yes        Yes        $17.55  $0.00  $17.55
MO   GTE  C-SHT 90   0   NRC                                    NRC  Yes        No         $65.00   N/A   $65.00
                         Arranged for Loop Signaling / ohm Max                                      N/A
                         Type 428                                                                   N/A
MO   GTE  C-SHT 90   0   MRC                                    MRC  Yes        Yes        $21.60  $0.00  $21.60
MO   GTE  C-SHT 90   0   NRC                                    NRC  Yes        No         $65.00   N/A   $65.00
                         Type A, B, and C Signaling Arrgments                                       N/A
                         Type A                                                                     N/A
MO   GTE  C-SHT 91   0   MRC                                    MRC  Yes        Yes        $8.40  $0.00   $8.40
MO   GTE  C-SHT 91   0   NRC                                    NRC  Yes        No         $30.00   N/A   $30.00
                         Type B                                                                     N/A
MO   GTE  C-SHT 91   0   MRC                                    MRC  Yes        Yes        $8.70  $0.00   $8.70
MO   GTE  C-SHT 91   0   NRC                                    NRC  Yes        No         $30.00   N/A   $30.00
                         Type C                                                                     N/A
MO   GTE  C-SHT 91   0   MRC                                    MRC  Yes        Yes        $3.55  $0.00   $3.55
MO   GTE  C-SHT 91   0   NRC                                    NRC  Yes        No         $1.05   N/A    $1.05
                         Channel Conditioning Charge                                               N/A
                         Type C1                                                                   N/A
                         2 point, not arranged for switch                                          N/A
</TABLE>

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             RESALE PRODUCTS & SERVICES - STATE OF MISSOURI



<TABLE>
<CAPTION>
                                                          Billing Resale    Discount  Retail  Avoided   Resale
ST  CO    TAR SEC    Rule       Service Description         Type  Position   Position  Rate    Cost      Rate
<S>  <C>  <C>       <C>     <C>                              <C>  <C>           <C>    <C>    <C>      <C>
MO   GTE  C-SHT 92   0   MRC                                 MRC  Yes           Yes    $9.40  $0.00    $9.40
MO   GTE  C-SHT 92   0   NRC                                 NRC  Yes           No    $80.00   N/A    $80.00
                         2 point arranged for switching                                        N/A
MO   GTE  C-SHT 92   0   MRC                                 MRC  Yes           Yes   $17.00  $0.00   $17.00
MO   GTE  C-SHT 92   0   NRC                                 NRC  Yes           No    $80.00   N/A    $80.00
                         Multipoint                                                            N/A
MO   GTE  C-SHT 92   0   MRC                                 MRC  Yes           Yes   $18.80  $0.00   $18.80
MO   GTE  C-SHT 92   0   NRC                                 NRC  Yes           No    $80.00   N/A    $80.00
                         Type C2                                                               N/A
                         2 point, not arranged for switch                                      N/A
MO   GTE  C-SHT 92   0   MRC                                 MRC  Yes           Yes   $37.70  $0.00   $37.70
MO   GTE  C-SHT 92   0   NRC                                 NRC  Yes           No    $80.00   N/A    $80.00
                         2 point arranged for switching                                        N/A
MO   GTE  C-SHT 92   0   MRC                                 MRC  Yes           Yes   $56.45  $0.00   $56.45
MO   GTE  C-SHT 92   0   NRC                                 NRC  Yes           No    $80.00   N/A    $80.00
                         Multipoint                                                            N/A
MO   GTE  C-SHT 92   0   MRC                                 MRC  Yes           Yes   $56.45  $0.00   $56.45
MO   GTE  C-SHT 92   0   NRC                                 NRC  Yes           No    $80.00   N/A    $80.00
                         Type C4                                                               N/A
                         2 point channel                                                       N/A
MO   GTE  C-SHT 92   0   MRC                                 MRC  Yes           Yes   $65.80  $0.00   $65.80
MO   GTE  C-SHT 92   0   NRC                                 NRC  Yes           No    $80.00   N/A    $80.00
                         3 or 4 point channel                                                  N/A
MO   GTE  C-SHT 92   0   MRC                                 MRC  Yes           Yes   $84.70  $0.00   $84.70
MO   GTE  C-SHT 92   0   NRC                                 NRC  Yes           No    $80.00   N/A    $80.00
                         Type C5                                                               N/A
                         2 pt chan, not arnged for switch                                      N/A
MO   GTE  C-SHT 92   0   MRC                                 MRC  Yes           Yes   $94.10  $0.00   $94.10
MO   GTE  C-SHT 92   0   NRC                                 NRC  Yes           No    $80.00   N/A    $80.00
                         Type D1                                                               N/A
MO   GTE  C-SHT 93   0   MRC                                 MRC  Yes           Yes   $11.35  $0.00   $11.35
MO   GTE  C-SHT 93   0   NRC                                 NRC  Yes           No    $80.00   N/A    $80.00
                         Dataphone Select-a-Station Service                                    N/A
                         PDSS -                                                                N/A
                         Sequen Arrangement, Common Equip                                      N/A
MO   GTE  C-SHT 99   0   MRC                                 MRC  Yes           Yes  $119.60  $0.00  $119.60
                         Addressable Arrangemnt, Comm Equip                                    N/A
MO   GTE  C-SHT 99   0   MRC                                 MRC  Yes           Yes  $152.85  $0.00  $152.85
                         Channel Connections -                                                 N/A
                         Per two-wire channel                                                  N/A
MO   GTE  C-SHT 99   0   MRC                                 MRC  Yes           Yes    $4.00  $0.00    $4.00
                         Per four-wire channel                                                 N/A
</TABLE>

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             RESALE PRODUCTS & SERVICES - STATE OF MISSOURI





<TABLE>
<CAPTION>
                                                                     Billing  Resale   Discount   Retail Avoided  Resale
ST  CO    TAR SEC    Rule       Service Description                    Type   Position  Position    Rate  Cost   Rate
<S>  <C>  <C>       <C>     <C>                                        <C>        <C>       <C>   <C>      <C>    <C>
MO   GTE  C-SHT 99    0     MRC                                         MRC       Yes       Yes   $13.60  $0.00   $13.60
                            SDSS -                                                                         N/A
                            Sequential Arrangement, Com Equip                                              N/A
MO   GTE  C-SHT 99    0     MRC                                         MRC       Yes       Yes  $119.60   N/A   $119.60
                            Addressable Arrangement, Com Equip                                             N/A
MO   GTE  C-SHT 99    0     MRC                                         MRC       Yes       Yes  $152.85  $0.00  $152.85
                            Channel Connections -                                                          N/A
                            Per two-wire channel                                                           N/A
MO   GTE  C-SHT 99    0     MRC                                         MRC       Yes       Yes    $4.00  $0.00    $4.00
                            Per four-wire channel                                                          N/A
MO   GTE  C-SHT 99    0     MRC                                         MRC       Yes       Yes   $13.60  $0.00   $13.60
                            SCU -                                                                          N/A
                            Common Equipment -                                                             N/A
                            First SCU, for sequential oper                                                 N/A
MO   GTE  C-SHT 100   0     MRC                                         MRC       Yes       Yes   $66.45  $0.00   $66.45
MO   GTE  C-SHT 100   0     NRC                                         NRC       Yes       No    $14.00   N/A    $14.00
                            First SCU, for addressable oper                                                N/A
MO   GTE  C-SHT 100   0     MRC                                         MRC       Yes       Yes   $93.00  $0.00   $93.00
MO   GTE  C-SHT 100   0     NRC                                         NRC       Yes       No    $14.00   N/A    $14.00
                            Additional SCU Connections                                                     N/A
                            For sequential operation                                                       N/A
MO   GTE  C-SHT 100   0     MRC                                         MRC       Yes       Yes   $15.65  $0.00   $15.65
MO   GTE  C-SHT 100   0     NRC                                         NRC       Yes       No    $14.00   N/A    $14.00
                            For addressable operation                                                      N/A
MO   GTE  C-SHT 100   0     MRC                                         MRC       Yes       Yes   $39.85  $0.00   $39.85
MO   GTE  C-SHT 100   0     NRC                                         NRC       Yes       No    $14.00   N/A    $14.00
                            Spare SCU Connection                                                           N/A
                            For sequential operation                                                       N/A
MO   GTE  C-SHT 100   0     MRC                                         MRC       Yes       Yes   $26.25  $0.00   $26.25
MO   GTE  C-SHT 100   0     NRC                                         NRC       Yes       No    $14.00   N/A    $14.00
                            For addressable operation                                                      N/A
MO   GTE  C-SHT 100   0     MRC                                         MRC       Yes       Yes   $51.10  $0.00   $51.10
MO   GTE  C-SHT 100   0     NRC                                         NRC       Yes       No    $14.00   N/A    $14.00
/A                                                                                                         N/A
                          DIGITAL DATA TRANSMISSION SERVICE - GTE Midwest PSC MO NO 6                      N/A
                            Local Channel                                                                  N/A
                            2.4 Kbps                                                                       N/A
MO   GTE  C-SHT 33    0     MRC                                         MRC       Yes       Yes   $55.00  $0.00   $55.00
MO   GTE  C-SHT 33    0     NRC                                         NRC       Yes       No    $71.00   N/A    $71.00
                            4.8 Kbps                                                                       N/A
MO   GTE  C-SHT 33    0     MRC                                         MRC       Yes       Yes   $55.00  $0.00   $55.00
MO   GTE  C-SHT 33    0     NRC                                         NRC       Yes       No    $71.00   N/A    $71.00
                            9.6 Kbps                                                                       N/A
</TABLE>

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             RESALE PRODUCTS & SERVICES - STATE OF MISSOURI

<TABLE>
<CAPTION>
                                                                     Billing       Resale  Discount   Retail Avoided  Resale
ST  CO    TAR SEC    Rule       Service Description                    Type       Position Position    Rate   Cost    Rate
<S>  <C>  <C>       <C>     <C>                                         <C>           <C>       <C>   <C>     <C>     <C>
MO   GTE  C-SHT 33   0      MRC                                         MRC           Yes       Yes   $55.00  $0.00   $55.00
MO   GTE  C-SHT 33   0      NRC                                         NRC           Yes       No    $71.00   N/A    $71.00
/A                          19.2 Kbps                                                                          N/A
MO   GTE  C-SHT 33   0      MRC                                         MRC           Yes       Yes   $55.00  $0.00   $55.00
MO   GTE  C-SHT 33   0      NRC                                         NRC           Yes       No    $71.00   N/A    $71.00
                            56 Kbps                                                                            N/A
MO   GTE  C-SHT 33   0      MRC                                         MRC           Yes       Yes   $68.00  $0.00   $68.00
MO   GTE  C-SHT 33   0      NRC                                         NRC           Yes       No    $71.00   N/A    $71.00
                            Interexchange Mileage                                                              N/A
                            Fixed Mileage                                                                      N/A
                            2.4 Kbps                                                                           N/A
MO   GTE  C-SHT 33   0      MRC                                         MRC           Yes       Yes   $25.00  $0.00   $25.00
                            4.8 Kbps                                                                           N/A
MO   GTE  C-SHT 33   0      MRC                                         MRC           Yes       Yes   $25.00  $0.00   $25.00
                            9.6 Kbps                                                                           N/A
MO   GTE  C-SHT 33   0      MRC                                         MRC           Yes       Yes   $25.00  $0.00   $25.00
/A                          19.2 Kbps                                                                          N/A
MO   GTE  C-SHT 33   0      MRC                                         MRC           Yes       Yes   $25.00  $0.00   $25.00
                            56 Kbps                                                                            N/A
MO   GTE  C-SHT 33   0      MRC                                         MRC           Yes       Yes   $25.00  $0.00   $25.00
                            Per Mile Rate                                                                      N/A
                            2.4 Kbps                                                                           N/A
MO   GTE  C-SHT 33   0      MRC                                         MRC           Yes       Yes    $2.00  $0.00    $2.00
                            4.8 Kbps                                                                           N/A
MO   GTE  C-SHT 33   0      MRC                                         MRC           Yes       Yes    $2.00  $0.00    $2.00
                            9.6 Kbps                                                                           N/A
MO   GTE  C-SHT 33   0      MRC                                         MRC           Yes       Yes    $2.00  $0.00    $2.00
/A                          19.2 Kbps                                                                          N/A
MO   GTE  C-SHT 33   0      MRC                                         MRC           Yes       Yes    $2.00  $0.00    $2.00
                            56 Kbps                                                                            N/A
MO   GTE  C-SHT 33   0      MRC                                         MRC           Yes       Yes    $2.00  $0.00    $2.00
                            Multistation Arrangement, Per Chan                                                 N/A
                            Connected at a Digital Hub                                                         N/A
MO   GTE  C-SHT 34   0      MRC                                         MRC           Yes       Yes   $12.00  $0.00   $12.00
/A                                                                                                             N/A
                         WIDEBAND DIGITAL SERVICE/1.544 Mbps GTE Midwest PSC MO NO 6                           N/A
                            Local Distribution Channel                                                         N/A
                            First Local Distribution Channel                                                   N/A
MO   GTE  D-SHT 43   0      MRC                                         MRC           Yes       Yes  $295.00  $0.00  $295.00
MO   GTE  D-SHT 43   0      NRC                                         NRC           Yes       No   $965.00   N/A   $965.00
                            Each Additional Dist Channel                                                       N/A
MO   GTE  D-SHT 43   0      MRC                                         MRC           Yes       Yes  $150.00  $0.00  $150.00
MO   GTE  D-SHT 43   0      NRC                                         NRC           Yes       No   $128.00   N/A   $128.00
</TABLE>

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             RESALE PRODUCTS & SERVICES - STATE OF MISSOURI






<TABLE>
<CAPTION>
                                                                            Billing    Resale   Discount   Retail Avoided Resale
ST  CO    TAR SEC    Rule       Service Description                          Type     Position  Position    Rate    Cost   Rate
<S>  <C>  <C>       <C>     <C>                                              <C>        <C>     <C>        <C>     <C>   <C>
                            Interexch Interofc Channel                                                             N/A
                            Channel Terminal                                                                       N/A
MO   GTE  D-SHT 44   0      NRC                                              NRC         Yes    No         $30.00  N/A   $30.00
                            Channel Mileage, Per Mile
MO   GTE  D-SHT 44   0      NRC                                              NRC         Yes    No         $21.60  N/A   $21.60
                                                                                                                   N/A
                                                                                                                   N/A
                         FRAME RELAY SERVICE GTE Midwest Inc - PSC MO NO 6                                         N/A
                            Frame Relay Service with Port and Access                                               N/A
                            56 Kbps                                                                                N/A
MO   GTE  F-SHT 90   0      NRC                                              NRC         Yes    No         $295.00 N/A  $295.00
MO   GTE  F-SHT 90   0      Month to Month                                   MRC         Yes    No         $110.00 N/A  $110.00
MO   GTE  F-SHT 90   0      One Year                                         MRC         Yes    No         $105.00 N/A  $105.00
MO   GTE  F-SHT 90   0      Three Year                                       MRC         Yes    No         $95.00  N/A   $95.00
MO   GTE  F-SHT 90   0      Five Year                                        MRC         Yes    No         $85.00  N/A   $85.00
                            128 Kbps                                                                               N/A
MO   GTE  F-SHT 90   0      NRC                                              NRC         Yes    No         $395.00 N/A  $395.00
MO   GTE  F-SHT 90   0      Month to Month                                   MRC         Yes    No         $200.00 N/A  $200.00
MO   GTE  F-SHT 90   0      One Year                                         MRC         Yes    No         $190.00 N/A  $190.00
MO   GTE  F-SHT 90   0      Three Year                                       MRC         Yes    No         $175.00 N/A  $175.00
MO   GTE  F-SHT 90   0      Five Year                                        MRC         Yes    No         $165.00 N/A  $165.00
                            256 Kbps                                                                               N/A
MO   GTE  F-SHT 90   0      NRC                                              NRC         Yes    No         $395.00 N/A  $395.00
MO   GTE  F-SHT 90   0      Month to Month                                   MRC         Yes    No         $285.00 N/A  $285.00
MO   GTE  F-SHT 90   0      One Year                                         MRC         Yes    No         $270.00 N/A  $270.00
MO   GTE  F-SHT 90   0      Three Year                                       MRC         Yes    No         $255.00 N/A  $255.00
MO   GTE  F-SHT 90   0      Five Year                                        MRC         Yes    No         $240.00 N/A  $240.00
                            384 Kbps
MO   GTE  F-SHT 90   0      NRC                                              NRC         Yes    No         $395.00 N/A  $395.00
MO   GTE  F-SHT 90   0      Month to Month                                   MRC         Yes    No         $365.00 N/A  $365.00
MO   GTE  F-SHT 90   0      One Year                                         MRC         Yes    No         $345.00 N/A  $345.00
MO   GTE  F-SHT 90   0      Three Year                                       MRC         Yes    No         $335.00 N/A  $335.00
MO   GTE  F-SHT 90   0      Five Year                                        MRC         Yes    No         $320.00 N/A  $320.00
                            1.544 Mbps                                                                             N/A
MO   GTE  F-SHT 90   0      NRC                                              NRC         Yes    No         $595.00 N/A  $595.00
MO   GTE  F-SHT 90   0      Month to Month                                   MRC         Yes    No         $530.00 N/A  $530.00
MO   GTE  F-SHT 90   0      One Year                                         MRC         Yes    No         $510.00 N/A  $510.00
MO   GTE  F-SHT 90   0      Three Year                                       MRC         Yes    No         $490.00 N/A  $490.00
MO   GTE  F-SHT 90   0      Five Year                                        MRC         Yes    No         $470.00 N/A  $470.00
                            Frame Relay Service with Port Only                                                     N/A
                            56 Kbps                                                                                N/A
MO   GTE  F-SHT 91   0      NRC                                              NRC         Yes    No         $95.00  N/A   $95.00
MO   GTE  F-SHT 91   0      Month to Month                                   MRC         Yes    No         $45.00  N/A   $45.00
</TABLE>

                                Page 39



<PAGE>   128

                 GTE TELEPHONE OPERATIONS HEADQUARTERS
             RESALE PRODUCTS & SERVICES - STATE OF MISSOURI




<TABLE>
<CAPTION>
                                                                            Billing  Resale   Discount   Retail Avoided Resale
ST  CO    TAR SEC    Rule       Service Description                          Type    Position Position    Rate   Cost   Rate
<S>  <C>  <C>       <C>     <C>                                                <C>   <C>       <C>        <C>     <C>   <C>
MO   GTE  F-SHT 91   0   One Year                                               MRC  Yes        No        $43.00  N/A   $43.00
MO   GTE  F-SHT 91   0   Three Year                                             MRC  Yes        No        $41.00  N/A   $41.00
MO   GTE  F-SHT 91   0   Five Year                                              MRC  Yes        No        $38.00  N/A   $38.00
                         128 Kbps                                                                                 N/A
MO   GTE  F-SHT 91   0   NRC                                                    NRC  Yes        No        $295.00 N/A  $295.00
MO   GTE  F-SHT 91   0   Month to Month                                         MRC  Yes        No        $90.00  N/A   $90.00
MO   GTE  F-SHT 91   0   One Year                                               MRC  Yes        No        $85.00  N/A   $85.00
MO   GTE  F-SHT 91   0   Three Year                                             MRC  Yes        No        $80.00  N/A   $80.00
MO   GTE  F-SHT 91   0   Five Year                                              MRC  Yes        No        $75.00  N/A   $75.00
                         256 Kbps                                                                                 N/A
MO   GTE  F-SHT 91   0   NRC                                                    NRC  Yes        No        $295.00 N/A  $295.00
MO   GTE  F-SHT 91   0   Month to Month                                         MRC  Yes        No        $135.00 N/A  $135.00
MO   GTE  F-SHT 91   0   One Year                                               MRC  Yes        No        $130.00 N/A  $130.00
MO   GTE  F-SHT 91   0   Three Year                                             MRC  Yes        No        $120.00 N/A  $120.00
MO   GTE  F-SHT 91   0   Five Year                                              MRC  Yes        No        $110.00 N/A  $110.00
                         384 Kbps                                                                                 N/A
MO   GTE  F-SHT 91   0   NRC                                                    NRC  Yes        No        $295.00 N/A  $295.00
MO   GTE  F-SHT 91   0   Month to Month                                         MRC  Yes        No        $190.00 N/A  $190.00
MO   GTE  F-SHT 91   0   One Year                                               MRC  Yes        No        $180.00 N/A  $180.00
MO   GTE  F-SHT 91   0   Three Year                                             MRC  Yes        No        $170.00 N/A  $170.00
MO   GTE  F-SHT 91   0   Five Year                                              MRC  Yes        No        $160.00 N/A  $160.00
                         1.544 Mbps                                                                               N/A
MO   GTE  F-SHT 91   0   NRC                                                    NRC  Yes        No        $495.00 N/A  $495.00
MO   GTE  F-SHT 91   0   Month to Month                                         MRC  Yes        No        $300.00 N/A  $300.00
MO   GTE  F-SHT 91   0   One Year                                               MRC  Yes        No        $285.00 N/A  $285.00
MO   GTE  F-SHT 91   0   Three Year                                             MRC  Yes        No        $265.00 N/A  $265.00
MO   GTE  F-SHT 91   0   Five Year                                              MRC  Yes        No        $245.00 N/A  $245.00
                         Frame Relay UNI PVC                                                                      N/A
MO   GTE  F-SHT 92   0   NRC                                                    NRC  Yes        No        $20.00  N/A   $20.00
MO   GTE  F-SHT 92   0   Month to Month                                         MRC  Yes        No        $8.00   N/A    $8.00
MO   GTE  F-SHT 92   0   One Year                                               MRC  Yes        No        $7.00   N/A    $7.00
MO   GTE  F-SHT 92   0   Three Year                                             MRC  Yes        No        $6.00   N/A    $6.00
MO   GTE  F-SHT 92   0   Five Year                                              MRC  Yes        No        $5.00   N/A    $5.00
                         Frame Relay NNI PVC                                                                      N/A
MO   GTE  F-SHT 92   0   NRC                                                    NRC  Yes        No        $20.00  N/A   $20.00
MO   GTE  F-SHT 92   0   From 0 to 16                                           MRC  Yes        No        $7.00   N/A    $7.00
MO   GTE  F-SHT 92   0   From 17 to 32                                          MRC  Yes        No        $9.00   N/A    $9.00
MO   GTE  F-SHT 92   0   From 33 to 64                                          MRC  Yes        No        $13.00  N/A   $13.00
MO   GTE  F-SHT 92   0   From 65 to 128                                         MRC  Yes        No        $22.00  N/A   $22.00
MO   GTE  F-SHT 92   0   From 129 to 256                                        MRC  Yes        No        $40.00  N/A   $40.00
MO   GTE  F-SHT 92   0   From 257 to 384                                        MRC  Yes        No        $58.00  N/A   $58.00
MO   GTE  F-SHT 92   0   From 385 to 448                                        MRC  Yes        No        $66.00  N/A   $66.00
MO   GTE  F-SHT 92   0   From 449 to 512                                        MRC  Yes        No        $75.00  N/A   $75.00
</TABLE>

                                Page 40



<PAGE>   129

                 GTE TELEPHONE OPERATIONS HEADQUARTERS
             RESALE PRODUCTS & SERVICES - STATE OF MISSOURI




<TABLE>
<CAPTION>
                                                                  Billing Resale    Discount   Retail Avoided  Resale
ST  CO    TAR SEC    Rule       Service Description                 Type  Position   Position  Rate    Cost    Rate
<S>  <C>  <C>       <C>     <C>                                      <C>  <C>          <C>     <C>      <C>    <C>
MO   GTE  F-SHT 92    0   From 513 to 768                            MRC  Yes           No     $110.00  N/A    $110.00
MO   GTE  F-SHT 92    0   From 769 to 1024                           MRC  Yes           No     $146.00  N/A    $146.00
MO   GTE  F-SHT 92    0   From 1025 to 1536                          MRC  Yes           No     $216.00  N/A    $216.00
                                                                                                        N/A
                                                                                                        N/A
                          MetroLAN CDL Connect                                                          N/A
                          DS-3 CDL                                                                      N/A
                          3 Year OPP                                                                    N/A
MO   GTE  G-SHT 106   0   NRC                                        NRC  Yes           No   $3,000.00  N/A  $3,000.00
MO   GTE  G-SHT 106   0   MRC                                        MRC  Yes           No   $1,350.00  N/A  $1,350.00
                          5 Year OPP                                                                    N/A
MO   GTE  G-SHT 106   0   NRC                                        NRC  Yes           No   $1,500.00  N/A  $1,500.00
MO   GTE  G-SHT 106   0   MRC                                        MRC  Yes           No   $1,250.00  N/A  $1,250.00
                          7 Year OPP                                                                    N/A        N/A
MO   GTE  G-SHT 106   0   MRC                                        MRC  Yes           No   $1,150.00  N/A  $1,150.00
                          OC-3                                                                          N/A
                          3 Year OPP                                                                    N/A
MO   GTE  G-SHT 106   0   NRC                                        NRC  Yes           No   $3,000.00  N/A  $3,000.00
MO   GTE  G-SHT 106   0   MRC                                        MRC  Yes           No   $1,750.00  N/A  $1,750.00
                          5 Year OPP                                                                    N/A
MO   GTE  G-SHT 106   0   NRC                                        NRC  Yes           No   $1,500.00  N/A  $1,500.00
MO   GTE  G-SHT 106   0   MRC                                        MRC  Yes           No   $1,600.00  N/A  $1,600.00
                          7 Year OPP                                                                    N/A
MO   GTE  G-SHT 106   0   MRC                                        MRC  Yes           No   $1,500.00  N/A  $1,500.00
                          MetroLAN CO Connect                                                           N/A
MO   GTE  G-SHT 106   0   MRC                                        MRC  Yes           No      $60.00  N/A     $60.00
                          MetroLAN Transport                                                            N/A
                          1.544 Mbps                                                                    N/A
MO   GTE  G-SHT 107   0   3 Year OPP                                 MRC  Yes           No      $90.00  N/A     $90.00
MO   GTE  G-SHT 107   0   5 Year OPP                                 MRC  Yes           No      $75.00  N/A     $75.00
MO   GTE  G-SHT 107   0   7 Year OPP                                 MRC  Yes           No      $60.00  N/A     $60.00
                          10 Mbps                                                                       N/A
MO   GTE  G-SHT 107   0   3 Year OPP                                 MRC  Yes           No     $300.00  N/A    $300.00
MO   GTE  G-SHT 107   0   5 Year OPP                                 MRC  Yes           No     $250.00  N/A    $250.00
MO   GTE  G-SHT 107   0   7 Year OPP                                 MRC  Yes           No     $200.00  N/A    $200.00
                          16 Mbps                                                                       N/A
MO   GTE  G-SHT 107   0   3 Year OPP                                 MRC  Yes           No     $450.00  N/A    $450.00
MO   GTE  G-SHT 107   0   5 Year OPP                                 MRC  Yes           No     $400.00  N/A    $400.00
MO   GTE  G-SHT 107   0   7 Year OPP                                 MRC  Yes           No     $300.00  N/A    $300.00
                          44.736 Mbps                                                                   N/A
MO   GTE  G-SHT 107   0   3 Year OPP                                 MRC  Yes           No     $900.00  N/A    $900.00
MO   GTE  G-SHT 107   0   5 Year OPP                                 MRC  Yes           No     $850.00  N/A    $850.00
MO   GTE  G-SHT 107   0   7 Year OPP                                 MRC  Yes           No     $800.00  N/A    $800.00
</TABLE>

                                Page 41



<PAGE>   130

                 GTE TELEPHONE OPERATIONS HEADQUARTERS
             RESALE PRODUCTS & SERVICES - STATE OF MISSOURI

<TABLE>
<CAPTION>
                                                                  Billing Resale   Discount   Retail Avoided Resale
ST  CO    TAR SEC    Rule       Service Description                 Type  Position  Position    Rate  Cost   Rate
<S>  <C>  <C>       <C>     <C>                                      <C>  <C>           <C>   <C>       <C>  <C>
                          155 Mbps                                                                      N/A
MO   GTE  G-SHT 107   0   3 Year OPP                                 MRC  Yes           No   $2,150.00  N/A  $2,150.00
MO   GTE  G-SHT 107   0   5 Year OPP                                 MRC  Yes           No   $1,950.00  N/A  $1,950.00
MO   GTE  G-SHT 107   0   7 Year OPP                                 MRC  Yes           No   $1,750.00  N/A  $1,750.00
                          MetroLAN Service Activation                                                   N/A
                          DS-1                                                                          N/A
MO   GTE  G-SHT 108   0   3 Year OPP                                 MRC  Yes           No      $50.00  N/A     $50.00
MO   GTE  G-SHT 108   0   5 Year OPP                                 MRC  Yes           No      $45.00  N/A     $45.00
MO   GTE  G-SHT 108   0   7 Year OPP                                 MRC  Yes           No      $40.00  N/A     $40.00
                          DS-3                                                                          N/A
MO   GTE  G-SHT 108   0   3 Year OPP                                 MRC  Yes           No     $170.00  N/A    $170.00
MO   GTE  G-SHT 108   0   5 Year OPP                                 MRC  Yes           No     $150.00  N/A    $150.00
MO   GTE  G-SHT 108   0   7 Year OPP                                 MRC  Yes           No     $130.00  N/A    $130.00
                          Ethernet                                                                      N/A
MO   GTE  G-SHT 108   0   3 Year OPP                                 MRC  Yes           No     $500.00  N/A    $500.00
MO   GTE  G-SHT 108   0   5 Year OPP                                 MRC  Yes           No     $450.00  N/A    $450.00
MO   GTE  G-SHT 108   0   7 Year OPP                                 MRC  Yes           No     $400.00  N/A    $400.00
                          Token Ring                                                                    N/A
MO   GTE  G-SHT 108   0   3 Year OPP                                 MRC  Yes           No     $500.00  N/A    $500.00
MO   GTE  G-SHT 108   0   5 Year OPP                                 MRC  Yes           No     $450.00  N/A    $450.00
MO   GTE  G-SHT 108   0   7 Year OPP                                 MRC  Yes           No     $400.00  N/A    $400.00
                          MetroLAN Service Activations - Additional
MO   GTE  G-SHT 108   0   NRC                                        NRC  Yes           No     $130.00  N/A    $130.00
</TABLE>
                                Page 42
<PAGE>   131




                                   APPENDIX C

                  INTERCONNECTION, TELECOMMUNICATIONS SERVICES

                            AND FACILITIES AGREEMENT


                                    BETWEEN


                            GTE MIDWEST INCORPORATED

                           GTE ARKANSAS INCORPORATED


                                      AND


                             DIGITAL TELEPORT, INC.


                            AMENDMENT NO. _________

THIS AMENDMENT (herein so called) is made effective as of ___________, 199____,
by and between GTE Midwest Incorporated/GTE Arkansas Incorporated ("GTE") and
Digital Teleport, Inc. ("DTI").  GTE and DTI are sometimes referred to herein
collectively as the "Parties" and individually as a "Party."  Either GTE or DTI
may be referred to as "Provider" or "Customer" as the context requires.

WHEREAS, Provider is providing to Customer and Customer is purchasing from
Provider those Services described in that certain Interconnection,
Telecommunications Services and Facilities Agreement for the State of
by and between GTE and DTI dated effective as of _______________, 199_____ (the 
"Agreement"); and

WHEREAS, the Parties desire to amend the Agreement as provided in this
Amendment.

NOW, THEREFORE, in consideration of the terms and conditions contained in this
Amendment, the Parties agree as follows:

1.

2.   ADDITIONAL SERVICES [IF APPLICABLE]

2.1  Provider agrees to provide to Customer and Customer agrees to purchase
     from Provider the following services under the terms and conditions set
     forth in the Agreement and within the service attachment listed below and
     attached to this Amendment:

                          Service Attachment _______ - ______________

2.2  As of the effective date of this Amendment, and continuing through the
     remaining term of the Agreement, ____________________________________ is
     made a part of the Services provided under the Agreement and Service
     Attachment _______ shall be deemed to be a Service Attachment to the
     Agreement.

2.3  As of the effective date of this Amendment, and continuing through the
     remaining term of the Agreement, Appendix B, Service Matrix, to the
     Agreement is hereby deleted and Appendix B, Service Matrix, to this
     Amendment is hereby inserted in lieu thereof to reflect the additional
     Services and related Service Locations.

                                      C-1
<PAGE>   132




3.   SERVICE LOCATIONS [IF APPLICABLE]

3.1  Provider agrees to provide to Customer and Customer agrees to purchase
     from Provider the following Services in the following locations:


                                      C-2
<PAGE>   133




<TABLE>
<S>                          <C>                                     <C>
  Service Location                                                      Services
   (identified by                                                    (identified by
    tandem serving              IP                                   Service Attachment
        area)               (identified by CLLI code)                Number)
- ---------------------------------------------------------------------------------------
</TABLE>

3.2  As of the effective date of this Amendment, the locations set forth in
     Section 3.1 above shall be deemed Service Locations under the Agreement.

3.3  As of the effective date of this Amendment, and continuing through the
     remaining term of the Agreement, Appendix B, Service Matrix, to the
     Agreement is hereby deleted and Appendix B, Service Matrix, to this
     Amendment is hereby inserted in lieu thereof to reflect additional Service
     Locations.

4.   INTERPRETATION

      All capitalized terms used but not defined herein shall have the meanings
      ascribed to such terms in the Agreement.

5.   EFFECT

      Except as modified herein, the Agreement shall remain in full force and
      effect.

6.   AUTHORITY

      Each person whose signature appears below represents and warrants that he
      or she has the authority to bind the Party on whose behalf he or she has
      executed this Amendment.

7.   MULTIPLE COUNTERPARTS

      This Amendment may be executed in multiple counterparts, each of which
      shall be deemed an original, and all of which shall constitute but one
      and the same instrument.

8.   NO OFFER

      Submission of this Amendment for examination or signature does not
      constitute an offer by Provider for the provision of the products or
      services described herein.  This Amendment will be effective only upon
      execution by both Provider and Customer.

IN WITNESS WHEREOF, the Parties have executed this Amendment on the date or
dates written below effective as of the date first above written.

<TABLE>
<S>                                     <C>
GTE MIDWEST INCORPORATED                DIGITAL TELEPORT, INC.
GTE ARKANSAS INCORPORATED


By                                      By
   --------------------------------        --------------------------------

Name                                    Name
     ------------------------------          ------------------------------

Title                                   Title
      -----------------------------           -----------------------------
</TABLE>

                                      C-3

<PAGE>   134




                                   APPENDIX D

                             RATES AND CHARGES FOR

                      TRANSPORT AND TERMINATION OF TRAFFIC

General.  The rates contained in this Appendix D are the rates as defined in
Article V and are subject to change resulting from future Commission or other
proceedings, including but not limited to any generic proceeding to determine
GTE's unrecovered costs (e.g., historic costs, contribution, undepreciated
reserve deficiency, or similar unrecovered GTE costs (including GTE's interim
Universal Service Support Surcharge)), the establishment of a competitively
neutral universal service system, or any appeal or other litigation.

Each Party will bill the other Party as appropriate:

      A.   The Local Interconnection rate element that applies to Local
           Traffic on a minute of use basis that each Party switches for
           termination purposes at its wire centers.  The local interconnection
           rate is $0.0064061.

      B.   The Tandem Switching rate element that applies to tandem
           routed Local Traffic on a minute of use basis.  This rate includes
           tandem transport, but does not include the local interconnection
           charge.  The tandem switching rate is $0.0022100.

      C.   The Common Transport Facility rate element that applies to
           tandem routed Local Traffic on a per minute/per mile basis.  The
           Common Transport Facility rate is $0.0000029.

      D.   The Common Transport facility rate element that applies to tandem
           routed Local Traffic on a per minute/per termination basis.  The
           Common Transport facility rate is $0.0001068.

                                      D-1
<PAGE>   135




                                   APPENDIX E

            RATES AND CHARGES FOR LOCAL NUMBER PORTABILITY USING RCF

General.  The rates contained in this Appendix E are as defined in Article V,
Section 7, and are subject to change resulting from future Commission or other
proceedings, including but not limited to any generic proceeding to determine
GTE's unrecovered costs (e.g., historic costs, contribution, undepreciated
reserve deficiency, or similar unrecovered GTE costs (including GTE's interim
Universal Service Support Surcharge)), the establishment of a competitively
neutral universal service system, or any appeal or other litigation.

In addition, as defined in Article V, Section 3.2.3, the Party providing the
ported number will pay the other Party the rate per line per month for each
ported business line and the rate per line per month for each ported
residential line for the sharing of Access Charges on calls to ported numbers.

<TABLE>
<S>               <C>                                             <C>
                  Business Rate Per Line Per Month:               $10.32

                  Residential Rate Per Line Per Month:            $4.59

SERVICE NUMBER PORTABILITY

Remote Call Forwarding                                            $3.40 line/month

Simultaneous Call Capability                                      $3.30 path/month

Non-recurring for Portability                                     $10.50
</TABLE>


                                      E-1
<PAGE>   136




                                   APPENDIX F

                         SERVICES AVAILABLE FOR RESALE

General.  The rates contained in this Appendix F are based upon an avoided cost
discount from GTE's retail rates as provided in Article VI, Section 5.3 of the
Agreement to which this Appendix F is attached and are subject to change
resulting from future Commission or other proceedings, including but not
limited to any generic proceeding to determine GTE's unrecovered costs (e.g.,
historic costs, contribution, undepreciated reserve deficiency, or similar
unrecovered GTE costs (including GTE's interim Universal Service Support
Surcharge)), the establishment of a competitively neutral universal service
system, or any appeal or other litigation.

<TABLE>
<CAPTION>
NON-RECURRING CHARGES FOR RESALE SERVICES
                <S>                                                <C>
                Initial Service Order, per order                   $41.50
                Subsequent Service Order, per order                $24.00

                Installation, per line                             $25.50
                Outside Facility Connection Charge, per order*     $Tariffed
</TABLE>


*This charge will apply when field work is required for establishment of new
resale service.  The terms, conditions and rates that apply for this work are
described in GTE's retail local service tariffs.

                                      F-2
<PAGE>   137




                                   APPENDIX G

                         PRICES FOR UNBUNDLED ELEMENTS

General.  The rates contained in this Appendix G are the rates as defined in
Article VII and are subject to change resulting from future Commission or other
proceedings, including but not limited to any generic proceeding to determine
GTE's unrecovered costs (e.g., historic costs, contribution, undepreciated
reserve deficiency, or similar unrecovered GTE costs (including GTE's interim
Service Support Surcharge)), the establishment of a competitively neutral
universal service system, or any appeal or other litigation.


<TABLE>
<S>   <C>        <C>                                    <C>
(1)   Local Loops
      Local Loop
                 2 Wire Loop                            $45.10
                 4 Wire Loop                            $63.60
      Network Interface Device
                 Basic NID                              $1.80
                 12x NID                                $1.80

(2)   Local Switching (Must purchase Port)
      Ports
                 2 Wire Basic Port                      $4.20
                 DS-1 Port                              $108.00

      Local Switching
                 Originating MOU                        $0.0064061
                 Terminating MOU                        $0.0064061

      Intrastate End Office Switching
                 Originating MOU                        $0.0064061
                 Terminating MOU                        $0.0064061
                 Interconnection Charge                 $0.0024022
                 CCL
                 -Originating                           $0.0299013
                 -Terminating                           $0.0714142

      Interstate End Office Switching
                 Originating MOU                        $0.0064061
                 Terminating MOU                        $0.0064061
                 Interconnection Charge                 $0.0024022
                 CCL
                 -Originating                           $0.0100000
                 -Terminating                           $0.0185608
(3)   Features                                          See Attached

(4)   Dedicated Transmission Links
      Entrance Facility
                 2 Wire Voice                           $32.00
                 4 Wire Voice                           $50.00
                 DS1 Standard 1st System                $325.00
                 DS1 Standard Add'l System              $150.00
                 DS3 Protected, Electrical              $1,257.92
                 DS1 to Voice Multiplexing              $195.00
</TABLE>

                                      G-1
<PAGE>   138

<TABLE>
<S>   <C>        <C>                                                    <C>
                 DS3 to Voice Multiplexing                              $490.00
      Direct Trunked Transport
                 Voice Facility Per ALM                                 $5.25
                 DS1 Facility Per ALM                                   $5.50
                 DS1 Per Termination                                    $40.00
                 DS3 Facility Per ALM                                   $40.00
                 DS3 Per Termination                                    $217.85


(5)   Common/Shared Transmission Links
      Transport Termination MOU/Term                                    $0.0001068
      Transport Facility MOU/Mile                                       $0.0000029

(6)   Tandem Switching MOU                                              $0.0022100


(7)   Databases and Signaling Systems
      Signaling Links and STP
                 56 Kbps Links                                          N/A
                 DS-1 Link                                              N/A
                 Signal Transfer Point (STP) Port Term                  N/A
      Call Related Databases
                 Line Information Database (ABS-Queries)                $0.035
                 Line Information Database Transport (ABS-Queries)      $0.0046
                 Toll Free Calling Database (DB800 Queries)             $0.0079990

Non-Recurring Charges for Unbundled Services

Service Ordering (loop or port)
      Initial Service Order, per order                                  $47.25
      Transfer of Service Charges, per order                            $16.00
      Subsequent Service Order, per order                               $24.00
      Customer Service Record Research, per request                     $5.25

Installation
      Unbundled Loop, per loop                                          $11.00
      Unbundled Port, per port                                          $11.00

Loop Facility Charge, per order                                         $59.75
      This charge will apply when field work is required for establishment of new unbundled
      loop service.

Monthly Recurring Charge for EIS
      DS0 Level Connection                                              $2.93
      DS1 Level Connection                                              $6.62
</TABLE>

                                      G-2
<PAGE>   139




                               MISSOURI FEATURES

<TABLE>
<CAPTION>
FEATURE NAME:                                             GTE PROPOSED RATE:
<S>      <C>                                                      <C>
1.       Speed Call 8 (Changeable)                                $0.25
2.       Speed Call 30 (Changeable)                               $0.25
3.       Cancel Call Waiting                                      $0.25
4.       Call Forward Variable                                    $0.25
5.       Call Waiting                                             $0.25
6.       Dual Tone Multifrequency (DTMF)                          $0.25
7.       Teen Service/Distinctive Ringing                         $0.25
8.       Three-Way Calling                                        $1.00
9.       Account Codes For AFR                                    $0.25
10.      Add On - Consultation Hold - Incoming Only               $0.25
11.      Attendant BL Verification                                $1.25
12.      Attendant camp-on (NonDL Console)                        $0.50
13.      Attendant Conference                                     $3.25
14.      Attendant Position Busy                                  $0.25
15.      Attendant Recall from Satellite                          $1.75
16.      Authorization Codes for AFR                              $0.25
17.      Basic Business Group                                     $3.00
18.      Dual Tone Multifrequency (DTMF)                          $0.25
19.      Station-to-Station Dialing (Intercom)                    $2.75
20.      Business Group Automatic Callback (BGAC)                 $0.25
21.      Call Forwarding Variable                                 $0.25
22.      Business Group - Speed Call - 8                          $0.25
23.      Business Group - Speed Call - 30                         $0.25
24.      Business Group - Three Way Calling (TWC)                 $1.00
25.      Business Set Access To Paging                            $2.50
26.      Business Set Call Grp Intercom                           $113.50
27.      Code Calling                                             $0.50
28.      Call Forward Busy Line                                   $0.25
29.      Call Forward Don't Answer                                $0.25
30.      Call Forward Fixed                                       $0.25
31.      Call Forwarding - Incoming Only                          $0.25
32.      Call Flip/Flop                                           $0.25
33.      Call Forwarding - Within Group                           $0.25
34.      Call Hold                                                $0.25
35.      Circular Hunting                                         $0.25
36.      Control of Facilities                                    $0.25
37.      Conference Calling 6 Way                                 $3.25
38.      Call Park                                                $0.25
39.      Call Pick-Up                                             $0.25
40.      Code Restrictions and Diversion                          $0.75
41.      Call Transfer Individual - All Calls                     $0.25
42.      Call Waiting Originating                                 $0.25
43.      Call Waiting Terminating                                 $0.25
44.      Direct Connect                                           $0.25
45.      Directed Call Pickup W/BI                                $0.25
46.      Directed Call Pickup WO/BI                               $0.25
47.      Dial Call Waiting                                        $0.25
</TABLE>

                                      G-3
<PAGE>   140


                               MISSOURI FEATURES

<TABLE>
<CAPTION>
FEATURE NAME:                                              GTE PROPOSED RATE:
<S>      <C>                                                      <C>
48.      Remote Access to (Business Group) Features               $0.25
49.      Distinctive Ringing                                      $0.25
50.      Expensive Route Warning Tone                             $0.25
51.      Fixed Night Service - Call Fwd                           $0.25
52.      Fixed Night Service - Key                                $1.50
53.      Fully Restricted (Orig/Term)                             $0.25
54.      Facility Restriction Level                               $0.75
55.      Foreign Exchange Facilities                              $0.50
56.      Last Number Redial                                       $0.25
57.      Loud Speaker Paging                                      $0.50
58.      Make Busy Key                                            $0.50
59.      Music on Hold                                            $0.25
60.      Off-Hook Queuing                                         $0.25
61.      On-Hook Queuing                                          $0.25
62.      Preferential Multiline Hunting                           $0.25
63.      Queuing                                                  $0.75
64.      Recorded Telephone Dictation                             $0.75
65.      Speed Calling Individual 1 Digit                         $0.25
66.      Speed Calling Individual 2 Digit                         $0.25
67.      Stop Hunt Key                                            $0.50
68.      Special Intercept Announcements                          $14.25
69.      SMDR To Customer Premise                                 $19.50
70.      Station Message Detail Recording - RAO                   $1.00
71.      Station Restricted (Orig/Term)                           $0.25
72.      Time of Day Routing Control                              $0.25
73.      Toll Restricted Service                                  $0.75
74.      Two-way Splitting                                        $0.25
75.      Uniform Call Distribution (UCD) Hunting                  $0.25
76.      Auto Alt Rt                                              $0.50
77.      Auto Rt Sel                                              $0.50
78.      Meet Me Conf                                             $20.00
79.      Auto Call Back                                           $0.25
80.      Anon Call Rej                                            $0.25
81.      Auto Recall                                              $0.25
82.      Call Num Deliver                                         $0.25
83.      Call Num Deliver Blk                                     $0.25
84.      Cust Ord. Trace                                          $0.25
85.      Dist Ring/VIP                                            $0.25
86.      Select Call Accept                                       $0.25
87.      Select Call Frwd                                         $0.25
88.      Select Call Reject                                       $0.25
89.      Select Call Wait                                         $0.25
         ------------------------------------------               -------
         TOTAL                                                    $212.50
</TABLE>


                                      G-4

<PAGE>   141




                               APPENDIX H

              RATES AND CHARGES FOR 911/E911 ARRANGEMENTS

The following services are offered by GTE for purchase by DTI, where an
individual item is not superseded by a tariffed offering.

<TABLE>
<CAPTION>
                                                    NRC        MRC
                                                  -------    -------
<S>  <C>                                          <C>          <C>
1.   9-1-1 Selective Router Map                   $125.00      n/a
     Provided is a color map showing a
     selective router's location and the GTE
     central offices that send their 9-1-1 call
     to it.  The selective router and central
     office information will include CLLI codes
     and NPA/NXXs served.  The map will include
     boundaries of each central office and show
     major streets and the county boundary.
     Permission to reproduce within DTI for its
     internal use is granted without further
     fee.  Non-tariffed price.

2.   9-1-1 Selective Router Pro-Rata Fee/trunk    $0           $100.77
     This fee covers the cost of selective
     routing switch capacity per trunk to cover
     investment to handle the additional
     capacity without going to the 9-1-1
     districts for additional funding.

3.   PS ALI Software                              $790.80
     a personal computer software program
     running on Windows 3.1(TM) for formatting
     subscriber records into NENA Version #2
     format to create files for uploading to
     GTE's ALI Gateway.  Fee includes software,
     warranty and 1 800 872-3356 support at no
     additional cost.

4.   ALI Gateway Service                          $135.00      $36.12
     Interface for delivery of ALI records to
     GTE's Data Base Management System.  This
     provides a computer access port for DTI to
     transmit daily subscriber record updates
     to GTE for loading into ALI databases.  It
     includes support at 1 800 872-3356 at no
     additional cost.

5.   9-1-1 Interoffice Trunk                      Tariff       Tariff
     This is a tariffed offering, to be found
     in each state's Emergency Number Service
     Tariff.

6.   ALI Database                                 Tariff       Tariff
     This is a tariffed offering, to be found
     in each state's Emergency Number Service
     Tariff.

7.   Selective Router Database per Record Charge  Tariff       Tariff
     Fee for each ALI record used in a GTE
     selective router.  This is a tariffed
     offering, to be found in each state's
     Emergency Number Service Tariff.
</TABLE>

                                      H-1

<PAGE>   142






<TABLE>
<CAPTION>
                                                           NRC         MRC
                                                         -------     -------
<S>  <C>                                                   <C>         <C>
8.   MSAG Copy
     Production of one copy of a 9-1-1 Customer's Master
     Street Address Guide, postage paid.
     a. Copy provided in paper format                      $238.50     $54.00
     b. Copy provided in flat ASCII file on a 3 1/2"
        diskette                                           $276.00     $36.00
</TABLE>


                                      H-2
<PAGE>   143




                               APPENDIX I

        SERVICE ORDERING, PROVISIONING, BILLING AND MAINTENANCE

1.   Service Ordering, Service Provisioning, and Billing Systems Generally.
     The following describes generally the operations support systems that GTE
     will use and the related functions that are available for ordering,
     provisioning and billing for resold services, interconnection facilities
     and services and unbundled network elements.  Except as specifically
     provided otherwise in this Agreement, service ordering, provisioning,
     billing and maintenance shall be governed by the GTE Guide.  Before orders
     can be taken, DTI will provide GTE with its Operating Company Number
     ("OCN") and Company Code ("CC") as follows:

      (a)  The ALEC must provide their OCN (four-digit alpha-numeric
           assigned by Bellcore or number administrator) on the ALEC Profile.
           The GTE Guide provides the necessary information for the ALEC to
           contact Bellcore to obtain the OCN.  There are no optional fields on
           the Profile.

      (b)  Before the Local Service Request ("LSR") and Directory
           Service Request ("DSR") order forms can be processed DTI must
           provide the OCN and Customer Carrier Name Abbreviation ("CCNA").

1.1  Operations Support Systems for Trunk-Side Interconnection

      1.1.1 DTI will be able to order trunk-side interconnection
           services and facilities from GTE through a direct electronic
           interface over the GTE Network Data Mover ("NDM") in a
           nondiscriminatory manner.  Orders for trunk-side interconnection
           will be initiated by an Access Service Request ("ASR") sent
           electronically by DTI over the NDM.  ASRs for trunk-side
           interconnection will be entered electronically into GTE's Carrier
           Access Management System ("CAMS") to validate the request, identify
           any errors, and resolve any errors back to DTI.  CAMS is a family of
           GTE systems comprised primarily of EXACT/TUF, SOG/SOP, and CABS.

      1.1.2 The use of CAMS to support DTI's requests for trunk-side
           interconnection will operate in the following manner:  GTE will
           route the ASR through its data center to one of two National Access
           Ordering Centers ("NACC").  The ASR will be entered electronically
           into the EXACT/TUF system for validation and correction of errors.
           Errors will be referred back to DTI.  DTI then will correct any
           errors that GTE has identified and resubmit the request to GTE
           electronically through a supplemental ASR, without penalty or charge
           (e.g., order modification charge) to DTI.  Similarly, errors
           committed by GTE subsequent to the receipt of a valid ASR from DTI
           will be expeditiously identified and corrected by GTE without the
           need for DTI's submission of a supplemental ASR.  GTE then will
           translate the ASR into a service order for provisioning and billing.
           In order to convert the ASR into a service order, GTE personnel
           must apply the necessary elements to provision the service and
           include the billable elements necessary for GTE to bill DTI for the
           services provided.  This application also requires a determination
           of the access tandem to end office relationships with the service
           requested.

      1.1.3 At the next system level, translated service orders will be
           distributed electronically through the SOG/SOP systems to several
           destinations.  The SOG/SOP system will begin the actual provisioning
           of the service for DTI.  Other GTE provisioning systems are CNAS and
           ACES.  The GTE Database Administrative Group ("DBA")

                                      I-1
<PAGE>   144




            and the Special Services Control Center ("SSCC") will be the two
            most important destinations at this level.  The DBA location will
            identify codes for the appropriate GTE switch in order to provide
            the functions required by the ASR.  The SSCC will provide the
            engineering for the facilities over which the services will be
            handled.  Information from these two groups (and others) then will
            be transmitted electronically to GTE's field service personnel
            (Customer Zone Technicians or "CZTs") who will establish the trunks
            and facilities, thus connecting the GTE facilities to a connecting
            company, if one is required, and to DTI.  GTE's CZTs also will
            contact DTI directly to perform testing, and upon acceptance by DTI,
            will make the necessary entries into the GTE system to complete the
            order.  The completed orders then will pass to GTE's Carrier Access
            Billing System ("CABS") which will generate the bill to DTI.  The
            billing process under CABS requires coordination with several other
            systems.

      1.1.4 Billing for transport and termination services cannot be
            accomplished without call records from GTE's central office
            switches.  Records of usage will be generated at GTE's end office
            switches or the access tandems.  Call usage records will be
            transmitted electronically from GTE's switches through GTE's Billing
            Intermediate Processor ("BIP").  This system will collect the call
            records, perform limited manipulations to the record and transfer
            them to a centralized data center where they will be processed
            through the Universal Measurement System ("UMS") to determine the
            validity and accuracy of the records.  UMS also will sort the
            records and send them to the CABS billing system, from which GTE
            will produce a bill and send it to DTI.

1.2  Operations Support Systems for Resold Services and Unbundled Elements

      1.2.1 DTI will also be able to order services for resale and
            unbundled network elements, as well as interim number portability,
            directly from GTE through an electronic interface.  To initiate an
            order for these services or elements, DTI will submit a Local
            Service Request ("LSR") from its data center to GTE's Data Center
            using the same electronic NDM interface used for trunk-side
            interconnection.  If no NDM interface exists or if DTI chooses to
            establish a separate NDM interface, DTI must request an NDM
            facility.  For new entrants that elect not to interface
            electronically, GTE will accommodate submission of LSR orders by
            facsimile, E-mail, Internet or a dial NDM arrangement.  An LSR is
            very similar to an ASR, except that it will be used exclusively for
            line-side interconnection requests.  GTE will transfer LSRs to 
            GTE's NOMC centralized service order processing center 
            electronically.

      1.2.2 Most LSRs will be used either to transfer an existing GTE
            customer to DTI or to request service for a new customer who is not
            an existing GTE customer.  Depending on the situation, different
            information will be required on the LSR.  LSRs for a conversion of 
            a GTE local customer to DTI must include information relating to 
            all existing, new and disconnected services for that customer, 
            including the customer's name, type of service desired, location of 
            service and features or options the customer desires.  DTI will be 
            able to obtain this customer information after GTE has received the
            customer's written consent as specified in Article VI.3.3.  For
            service to a new customer who is not an existing GTE customer, the
            LSR must contain the customer's name, service address, service 
            type, services, options, features and ALEC data.  If known, the LSR 
            should include the telephone number and due date/desired due date.

                                      I-2
<PAGE>   145




      1.2.3 While DTI would have its own customer information and may
           have the SAG/GTE products on tape from GTE, DTI would not have the
           due date or new telephone number for new customers since that
           information is contained in GTE's systems.  Therefore, a process is
           required to provide this information to DTI.  GTE itself does not
           have uniform access to this information electronically.  Until GTE
           and DTI have agreed and established electronic interfaces, DTI
           agrees that an 800 number is the method that will be used.  The 800
           telephone number will connect DTI directly to GTE's NOMC service
           representatives.  When DTI receives a request for basic services
           from a new local service customer, DTI will call GTE's NOMC through
           the 800 number, and, while the new customer is on hold, GTE will
           provide the due date for service and the new telephone number for
           that customer.  At the same time, DTI will give GTE the new
           customer's name, service address and type of requested service
           (i.e., R1, B1).  GTE will enter that information into its SORCES or
           SOLAR service ordering systems to be held in suspense until DTI
           sends the confirming LSR.  DTI will then return to its customer
           holding on the line and provide the due date and new telephone
           number.

      1.2.4 After concluding the telephone call with the new customer,
           DTI will complete a confirming LSR for the new service and send it
           electronically to GTE's data center for processing.  Upon receipt,
           GTE will match the LSR with the service order suspended in GTE's
           system, and if there is a match, GTE will process the LSR.  After
           the LSR is processed, GTE will transmit confirmation electronically
           to DTI through the NDM that the LSR has been processed, providing a
           record of the telephone number and due date.  DTI will be required
           to submit the confirming LSR by 12:00 p.m. each day local time, as
           defined by the location of the service address.  If DTI fails to
           submit the LSR in a timely manner, the suspended LSR will be
           considered in jeopardy, at which time GTE will assign a new due date
           upon receipt of the delayed LSR for such customer requests and
           notify DTI of the change.

      1.2.5 Number assignments and due date schedules for services other
           than single line service and hunt groups up to 12 lines will be
           assigned within approximately twenty-four (24) hours after GTE's
           receipt of the LSR using the standard Local Confirmation ("LSC")
           report sent electronically to DTI over the NDM, thereby providing a
           record of the newly established due date.  An exception would be a
           multi-line hunt group for 12 lines or fewer.  The other numbers then
           will be provided through the normal electronic confirmation process.

      1.2.6 The processing of specifically requested telephone numbers
           (called "vanity numbers") is as follows.  GTE will work with DTI on
           a real time interface to process vanity numbers while DTI's customer
           is still on the line.  If a number solution can be established
           expeditiously, it will be done while the customer is still on the
           line.  If extensive time will be required to find a solution, GTE
           service representatives will work with DTI representatives off line
           as GTE would for its own customers.  For all of this, the basic
           tariff guidelines for providing telephone numbers will be followed.

      1.2.7 Once the order for line-side interconnection service is
           established, it is moved for provisioning to the next system level.
           Here, GTE will validate and process the LSR to establish an account
           for DTI and, if GTE continues to provide some residual services to
           the customer, GTE will maintain a GTE account.  In GTE's system,
           GTE's account is called the Residual Account and DTI's account is
           referred to as DTI Account.  If any engineering for the service is
           necessary, the account would be distributed to the SSCC.  Otherwise,
           it will be distributed for facility assignment.

                                      I-3

<PAGE>   146




      1.2.8 With the account established and any engineering and
           facility assignment complete, GTE then will transmit electronically
           a record to GTE's CZT field personnel if physical interconnection or
           similar activity is required.  The CZTs will provision the service
           and then electronically confirm such provision in the SOLAR/SORCES
           system when completed.  The accounts then will be transmitted to
           GTE's Customer Billing Services System ("CBSS").  GTE shall provide
           to DTI a service completion report.  Call records for actual service
           provided to DTI's customers on GTE facilities will be transmitted
           from GTE's switches through some usage rating systems (BIP, UMS),
           screened and eventually delivered to CBSS for the generation of
           bills.

      1.2.9 CBSS is a different system than CABS, and it is the one that
           GTE will utilize to produce the required bills for resold services,
           unbundled elements and local number portability.  CBSS will create a
           bill to DTI for resold services and unbundled elements along with a
           summary bill master.  Daily unrated records for intraLATA toll usage
           and local usage (in collect usage data will be provided on rated
           basis) on DTI's accounts will be generated and transmitted
           electronically to DTI.

      1.2.10 On resold accounts, GTE will provide usage in EMR format per
           existing file exchange schedules.  The usage billing will be in
           agreed upon level of detail for DTI to issue a bill to its end
           users.

      1.2.11 GTE will provide DTI with detailed monthly billing information in
           a paper format until an agreed upon Electronic Data Interchange 811
           electronic bill format is operational.

      1.2.12 State or sub-state level billing will include up to ten (10)
           summary bill accounts.

      1.2.13 GTE accepts DTI's control reports and agrees to utilize industry
           standard return codes for unbillable messages.  Transmission will
           occur via the NDM.  Tape data will conform to Attachment "A" of the
           LRDTR.  Data will be delivered Monday through Friday except for
           Holidays as agreed.  Data packages will be tracked by invoice
           sequencing criteria.  GTE contacts will be provided for
           sending/receiving usage files.

      1.2.14 GTE will retain data backup for 45 Business Days.  To the extent
           this retention is exclusively for DTI, DTI shall reimburse GTE for
           all expenses related to this retention.

      1.2.15 In addition to the LSR delivery process, DTI will distribute
           directory assistance and directory listing information (together
           sometimes referred to hereafter as "DA/DL information") to GTE via
           the LSR ordering process over the NDM.  GTE will provide listings
           service via its "listing continuity" offering.

      1.2.16 Charges and credits for PIC changes ordered via an LSR will appear
           on the wholesale bill.  As DTI places a request for a PIC change via
           LSR, the billing will be made on DTI account associated with each
           individual end user.  GTE will process all PIC changes from IXCs
           that are received for DTI end users by rejecting back to the IXC
           with DTI OCN.  Detail is provided so that DTI can identify the
           specific charges for rebilling to their end user.

                                      I-4

<PAGE>   147




      1.2.17 CMDS.  The parties will provide for the distribution of intraLATA
           CMDS incollect messages and/or selected local measured service
           messages as follows:

                  1.2.17.1 Messages to be Screened.  GTE receives CMDS I
                       transmissions containing intraLATA incollect messages
                       from the state RBOC CMDS host each business day.  Per
                       DTI's request, GTE will screen the incollects by NPA and
                       line number and accumulate the Collect, Third Number
                       Billed and Credit Card (collectively called incollects)
                       messages in a data file.  The screening will be for end
                       users who have chosen DTI as their local service
                       provider through a Resale or Unbundled Network
                       arrangement.  The screened incollect messages and any
                       Local Measured Service (LMS) usage will be accumulated
                       and forwarded to DTI.  The Parties will mutually agree
                       on the frequency of the data exchange and the method of
                       transmission (i.e., magnetic tape or direct electronic
                       transmission).  GTE will forward the screened messages
                       in the industry standard EMR format.  GTE intraLATA toll
                       messages that are recorded by GTE and dialed on a one
                       plus or zero plus basis are not part of this section and
                       will not be screened.

                  1.2.17.2 Compensation.  GTE will bill DTI monthly for all
                       services related to the screening, accumulating,
                       processing and transmitting of incollect messages and
                       LMS usage, if applicable, at a reasonable and mutually
                       agreeable charge.  In addition, any message processing
                       fee associated with DTI's incollect messages that are
                       charged to GTE by the CMDS Host will be passed on to DTI
                       on the monthly statement.  All revenue, surcharges,
                       taxes and any other amounts due to the CMDS Host for
                       DTI's incollect messages will be billed on the monthly
                       statement.  It is DTI's responsibility to bill and
                       collect all incollect and LMS amounts due from its end
                       users.  The incollect and LMS revenue amounts that are
                       listed on the monthly invoice are payable to GTE in
                       total.  The Parties agree that the arrangement for
                       invoicing the incollect and LMS revenue amounts due GTE
                       is not a settlement process with DTI.

                  1.2.17.3 Administration.  The Parties agree to develop a
                       process whereby DTI's end user information is available
                       in a timely manner to allow GTE to build tables to
                       screen the CMDS incollect files and LMS files on behalf
                       of DTI.

      1.2.18 Backbilling.  GTE shall bill DTI on a timely basis.  In no case
           shall GTE bill DTI for previously unbilled charges that are for more
           than one year prior to the current bill date.

1.3  Order Processing.

      1.3.1 Order Expectations.  DTI agrees to warrant to GTE that it is
           a certified provider of telecommunications service.  DTI will
           document its Certificate of Operating Authority on DTI Profile and
           agrees to update this DTI Profile as required to reflect its current
           certification.  The Parties agree to exchange and to update end user
           contact and referral numbers for order inquiry, trouble reporting,
           billing inquiries,

                                      I-5

<PAGE>   148




            and information required to comply with law enforcement and other
            security agencies of the government.  The Parties also agree to
            exchange and to update internal order, repair and billing point of
            contacts.  Prior to submitting an order under this Agreement, DTI
            shall obtain such documentation as may be required by state and
            federal laws and regulations.

      1.3.2 GTE shall provide DTI with a specified customer contact
           center for purposes of placing service orders and coordinating the
           installation of services.  These activities shall be accomplished by
           telephone call or facsimile until electronic interface capability
           has been established.  The Parties adopt the OBF LSR and DSR forms
           for the ordering, confirmation and billing of resale and unbundled
           services.  The Parties adopt the OBF ASR forms for the ordering,
           confirmation and billing of trunk-side interconnection.

      1.3.3 GTE will process such service orders during normal operating
           hours, at a minimum on each Business Day between the hours of 8 a.m.
           to 8 p.m. Eastern Time and shall implement service orders within the
           same time intervals used to implement service orders for similar
           services for its own users.

      1.3.4 GTE will provide current GTE customer proprietary network
           information (name, address, telephone number and description of
           services provided by GTE including PIC and white page directory
           listing information) as provided in Article VI, Section 3.  The
           return of customer information will be via facsimile or via
           electronic transmission.

      1.3.5 Transfer Between Local Service Providers - GTE will provide
           a displacement/out service report to a Local Service Provider (LSP)
           whenever an end user leaves that LSP and procures service from
           another LSP.  When DTI end user changes to another LSP, GTE will
           notify DTI when such activity occurs the day after completion or
           within 48 hours of such disconnect.

2.   Maintenance Systems.

2.1  General Overview

      2.1.1 If DTI requires maintenance for its local service customers,
           DTI will initiate a request for repair (sometimes referred to as a
           "trouble report") by calling GTE's Customer Care Repair Center.
           During this call, GTE service representatives will verify that the
           end-user is DTI customer and will then obtain the necessary
           information from DTI to process the trouble report.  While DTI
           representatives are still on the line, GTE personnel will perform an
           initial analysis of the problem and remote line testing for resale
           services.  If engineered services are involved, the call will be
           made to the GTE SSCC for handling.  If no engineering is required
           and the line testing reveals that the trouble can be repaired
           remotely, GTE personnel will correct the problem and close the
           trouble report while DTI representatives are still on the line.  If
           on-line resolution is not possible, GTE personnel will provide DTI
           representatives a commitment time for repair, and the GTE personnel
           then will enter the trouble ticket into the GTE service dispatch
           queue.  DTI's repair service commitment times will be within the
           same intervals as GTE provides to its own end users.  Maintenance
           and repair of GTE facilities is the responsibility of GTE and will
           be performed at no incremental charge to DTI.  If, as a result of
           DTI-initiated trouble report, trouble is found to be the
           responsibility of DTI (e.g., non-network cause) GTE will charge DTI
           for trouble isolation.  DTI will have the ability to report

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            trouble for its end users to appropriate trouble reporting centers
            24 hours a day, 7 days a week.  DTI will be assigned a customer
            contact center when initial service agreements are made.

      2.1.2 Repair calls to the SSCC for engineered services will be
           processed in essentially the same manner as those by the GTE
           Customer Care Center.  GTE personnel will analyze the problem,
           provide DTI representative with a commitment time while they are
           still on the line, and then place the trouble ticket in the dispatch
           queue.

      2.1.3 GTE then will process all DTI trouble reports in the dispatch queue 
           along with GTE trouble reports in the order they were filed (first 
           in, first out), with priority given to out-of-service conditions.  
           If, at any time, GTE would determine that a commitment time given to 
           DTI becomes in jeopardy, GTE service representatives will contact 
           DTI by telephone to advise of the jeopardy condition and provide a 
           new commitment time.

      2.1.4 Trouble reports in the dispatch queue will be transmitted
           electronically to GTE CZT service technicians who will repair the
           service problems and clear the trouble reports.  For cleared DTI
           trouble reports, GTE service technicians will make a telephone call
           to DTI directly to clear the trouble ticket.  GTE service
           technicians will make the confirmation call to the telephone number
           provided by DTI.  If DTI is unable to process the call or places the
           GTE technician on hold, the call will be terminated.  To avoid
           disconnect, DTI may develop an answering system, such as voice mail,
           to handle the confirmation calls expeditiously.

      2.1.5 GTE will provide electronic interface access to operation
           support systems functions which provide the capability to initiate,
           status and close a repair trouble ticket.  GTE will not provide to
           DTI real time testing capability on DTI end user services.  GTE will
           not provide to DTI an interface for network surveillance
           (performance monitoring).

      2.1.6 GTE will resolve repair requests by or for DTI local service
           customers using GTE's existing repair system in parity with repair
           requests by GTE end users.  GTE will respond to service requests for
           DTI using the same time parameters and procedures that GTE uses.
           DTI then would call GTE's Customer Care Center or SSCC while the
           customers were on hold.

2.2  Network Management Controls.

      2.2.1 Network Maintenance and Management.  The Parties will work
           cooperatively to install and maintain a reliable network.

      2.2.2 Neither Party shall be responsible to the other if necessary
           changes in network configurations render any facilities of the other
           obsolete or necessitate equipment changes.

      2.2.3 Network Management Controls.  Each Party shall provide a
           24-hour contact number for Network Traffic Management issues to the
           other's network surveillance management center.  A fax number must
           also be provided to facilitate event notifications for planned mass
           calling events.  Additionally, both Parties agree that they shall
           work cooperatively that all such events shall attempt to be
           conducted in such a manner as to avoid degradation or loss of
           service to other end users.  Each

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            Party shall maintain the capability of respectively implementing
            basic protective controls such as "Cancel To" and "Call Gap."

3.   Electronic Interface.  The Parties shall work cooperatively in the
     implementation of electronic gateway access to GTE operational support
     systems functions in the long-term in accordance with established industry
     standards.  DTI shall compensate GTE for the full costs including but not
     limited to design, development, testing, implementation and deployment,
     for access to GTE's Operational Support System functions.  Where
     subsequent parties request use of GTE's operation support systems, cost
     recovery for such electronic interface systems shall be allocated among
     all requesting users.

3.1  DTI shall have immediate access to the following OSS electronic
     interfaces that will provide functionality to enable DTI to service
     customers in an equal and non-discriminatory manner:

      3.1.1 Pre-Order functions, e.g., TN Assignment, DD Reservation,
           Address Validation, Product Availability, that are available on a
           dial-up or dedicated basis using the Secure Integrated Gateway
           System (SIGS).

      3.1.2 Order functions that are available on a dial-up or dedicated
           basis using CONNECT:  Mail file transfer.

      3.1.3 Repair functions, e.g., trouble report repair functions, to
           allow DTI to determine status and close trouble reports.

      3.1.4 Electronic transfer of DTI bill in electronic data 811
           format.

3.2  DTI may migrate to fully interactive system to system interconnectivity.
     GTE, with input from DTI and other carriers, shall provide general
     interface specifications for electronic access to this functionality.
     These specifications will be provided to enable DTI to design system
     interface capabilities.  Development will be in accordance with applicable
     national standards committee guidelines.  Such interfaces will be
     available as expeditiously as possible.

3.3  All costs and expenses for any new or modified electronic interfaces
     exclusively to meet DTI requirements that GTE determines are technically
     feasible and GTE agrees to develop will be paid by DTI.  Costs for
     development of systems intended for common use by competing carriers will
     be assessed based on a mutually agreed method of cost recovery.

3.4  DTI shall be responsible for modifying and connecting any of its
     pre-ordering and ordering systems with GTE provided interfaces as
     described in this Appendix.

4.   GTE Initiated Electronic System Redesigns.  GTE will not charge DTI when
     GTE initiates its own electronic system redesigns/reconfigurations.

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                                   APPENDIX J

                                  SS7 SERVICES


                                   ARTICLE 1.

                                  DEFINITIONS

In addition to the definitions contained elsewhere in the Agreement to which
this Appendix J is attached and made a part, for purposes of this Appendix J
the following terms shall have the following meanings.

1.1  "A" Link:  An access signaling link that connects SPs and/or SSPs to
     STPs.

1.2  "B" Link:  A bridge signaling link that connects two (2) sets or pairs of
     STPs, not the STPs within a mated pair, but on the same hierarchical
     level.

1.3  Compatibility Testing:  Certification testing performed by
     representatives of GTE and DTI to ensure proper interconnection of CCS
     network facilities for accurate transmission of system signals and
     messages.  This certification testing shall be performed in accordance
     with the following ANSI documents:
            T1.234 Telecommunications - Signaling System Number 7 (SS7) - MTP
            Levels 2 and 3 Compatibility Testing (ATIS)
            T1.235 Telecommunications - Signaling System Number 7 (SS7) - SCCP
            Class 0 Compatability Testing (ATIS)
            T1.236 Telecommunications - Signaling System Number 7 (SS7) - ISDN
            User Part Compatibility Testing (ATIS)

1.4  Service:  The service described in Article 2 of this Appendix.

1.5  Signaling Link:  An end-to-end high-capacity data link (56 kbps) that
     transmits supervision and control signals from one network SS7 node to
     another in a CCS network.  The link type identifies the functionality of
     the signaling link sets.  The two link types associated with the Service
     are "a" Links and "B" Links.

1.6  Signaling Point Code (SPC):  A code that identifies the Signaling Point
     address in the CCS network.  Signaling Point Codes consist of three (3)
     segments of three (3) digits each, identifying the network ID, network
     cluster, and cluster member, respectively.

1.7  Signaling Point of Interface (SPOI):  The point at which GTE hands off
     signaling information to DTI.

                                   ARTICLE 2.

                              SERVICE DESCRIPTION

2.1  Provision.  Subject to the terms and conditions of this Appendix, GTE
     agrees to provide the Service to DTI.

2.2  Interconnection.  This Agreement is for DTI's interconnection with GTE at
     GTE's                                      STPs to support local exchange
     services.  DTI shall not submit signaling messages in support of
     interexchange services.

2.3  Service.  The "Service" consists of the following:

      (a)  Interconnection of GTE's CCS/SS7 network to DTI's CCS/SS7
           network is via an "a" Link connection between DTI's SP or SSP and
           GTE's STP.  The "a" Link connection is made by a

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            dedicated 56 kbps channel between the SP or SSP and the STP.  Any
            connection from an SSP or an SP to an STP pair will have a link to
            each individual STP (i.e., two (2) links).  DTI and GTE shall
            mutually agree upon the location of the SPOI.

      (b)  Interconnection of GTE's CCS/SS7 network to DTI's CCS/SS7
           network via a "B" Link connection between DTI's STPs and GTE's STPs.
           The "B" Link connection is a dedicated 56 kbps channel.
           Connections between two (2) pairs of STPs will have four (4)
           connections; i.e., one (1) link from each individual STP to each
           individual STP.  DTI and GTE shall mutually agree upon the location
           of the SPOI.

      (c)  Local and IntraLATA call set-up signaling, allowing DTI to
           use the out-of-band trunk signaling provided by GTE's CCS/SS7
           network to carry its calls on the intraLATA toll network.

      (d)  The Service shall include access to:  (1) all switching
           systems served by a given STP which have been converted to SS7
           signaling, including switching systems owned by other local service
           providers; (2) databases directly connected to a given STP, with the
           exception of 800/888 databases which can be accessed through any
           STP; (3) other local service provider STPs on an intraLATA basis;
           and (4) other Third Party local service provider STPs on an
           intraLATA basis.

      (e)  It is the responsibility of DTI to populate the "privacy
           indicator" portion of all SS7 signaling messages forwarded to GTE's
           network.  GTE agrees to deliver the information forwarded by DTI in
           the SS7 signaling message.  DTI, by entering into this Agreement,
           agrees to deliver "privacy indicator" information forwarded by GTE
           in its signaling message.

      (f)  DTI acknowledges that call set-up times may be greater when
           DTI employs intermediate access tandems (IATs) in its network.

      (g)  If selected on the order form attached to this Appendix, the
           Service shall also include IXC call set-up signaling service (ISUP)
           as described in Article 2.4 of this Appendix.  Additional charges as
           set forth in Exhibit A shall apply.

2.4  ISUP Service Charge.  This is an optional service that allows DTI to
     utilize SS7 signaling to an SS7 capable interexchange carrier (IXC) for
     Feature Group D access service and other intraLATA interexchange services.
     The ISUP service is a monthly charge.

      (a)  The rate for ISUP signaling is per connection in situations
           when GTE does not provide any underlying call messages for DTI on
           GTE's network trunks.  The rate for ISUP signaling is shown in
           Exhibit a.

      (b)  Where GTE has a mated pair of STPs and has CCS/SS7
           interconnection facilities to an IXC within the same LATA, for
           interexchange telecommunications services, GTE shall provide call
           set-up signaling between DTI and the IXC.

      (c)  DTI agrees to provide to GTE such information as deemed
           necessary by GTE for network planning in connection with this
           offering and as may be requested by GTE from time to time.

      (d)  DTI must provide the Signaling Point Codes of the IXCs for
           which it is providing call setup via GTE's SS7 signaling network, so
           that GTE screening and translation tables can be updated.

2.5  Technical Specifications.  The technical specifications for the Services
     described above are defined in Bellcore TR-TSV-000905.  GTE will provide
     SS7 via OR-394-SS7 and/or OR-317-SS7 format(s).

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2.6  Other Services.  If DTI desires to order SS7-related services other than
     the Service, such services will be governed by separate agreements.

2.7  Applicable Traffic.  The Service applies to the traffic of DTI and its
     subtending LECs only.  DTI must provide GTE with thirty (30) calendar
     days' written notice and a letter of agency before the traffic of any
     party other than DTI or its subtending LECs may be transmitted through
     DTI's facilities on to GTE's SS7 network.

                               ARTICLE 3.

                         MANNER OF PROVISIONING

3.1  Link Facilities.  The link facilities to GTE STPs in the same LATA can be
     either:

      (a)  "a" Link sets from DTI's SP or SSP.  A minimum of two (2)
           links is required, one (1) from the SP or SSP to each STP; or,

      (b)  "B" Link sets from DTI's STPs that are connected to GTE's
           mated pairs of STPs.  A minimum of four (4) links is required
           between the two (2) pairs of STPs.

3.2  Port Termination.  An STP port termination is required for each 56 kbps
     access link utilized for the Service.  STP locations are set forth in the
     National Exchange Carrier Association, Inc. (NECA) Tariff, F.C.C. No. 4.

3.3  Signaling Point Codes.  GTE shall install all applicable Signaling Point
     codes for each signaling link at each of GTE's interconnecting STPs.

3.4  Protocol.  GTE shall provision the Service in accordance with ANSI T1.226
     Telecommunications - Operations, Administration, Maintenance, and
     Provisioning (OAM&P) -Management of functions for Signaling System No. 7
     (SS7) Network Interconnections (ATIS) with the exception of references to
     OMAP protocol elements.  The Service cannot be established until
     Compatibility Testing has been successfully completed between DTI and GTE.

3.5  56 kbps Channel.  Unless DTI elects to provide such links, GTE shall
     provide two (2) or four (4) 56 kbps circuits as link facilities at rates
     set forth in Article 4 herein.  If approved by GTE, DTI may utilize a 56
     kbps channel of an intraLATA DS1 (1.544 mbps) facility, which is in place
     at the time of ordering, as an "A" Link or a "B" Link, for the STP access
     connection between the SPOI and GTE's STP.  WHEN THIS OPTION IS CHOSEN,
     DTI UNDERSTANDS AND ACCEPTS THAT THE SERVICE PERFORMANCE STANDARDS AS
     OUTLINED IN BELLCORE DOCUMENT TR-TSV-000905 MAY NOT BE MET IN THE
     PROVISION OF THE TOTAL SERVICE.  If such a channel is not utilized, DTI
     must order DS1 (1.544 Mbps) service.

3.6  Multiplexing.  Where technically required, GTE shall provide multiplexing
     arrangements to DTI at no charge.

3.7  Diversity.  Where technically feasible and not unreasonably economically
     burdensome, GTE agrees to allow interoffice and intraoffice diversity.

                               ARTICLE 4.

                           RATES AND CHARGES

4.1  Payment.  DTI agrees to pay to GTE for the Service at the rates and
     charges set forth in Exhibit A attached to this Appendix and made a part
     hereof.

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<PAGE>   154




4.2  Period.  Subject to Article 4.3 below, the rates and charges shall remain
     in effect and are firm for a period of twelve (12) months from the
     effective date of this Appendix.  Thereafter, GTE shall give DTI sixty
     (60) calendar days' notice of any price change.  If the new prices are not
     acceptable to DTI, DTI may terminate this Appendix upon thirty (30)
     calendar days' advance written notice without penalties for either Party.

4.3  Rate Basis.  The rates are based upon rates and charges reflected in
     GTE's approved CCS/SS7 interconnection tariffs.  To the extent that tariff
     rates are adjusted, rates and charges for similar rate elements in this
     Appendix will be adjusted accordingly on the date the new tariff rates
     become effective.  If a state or federal regulatory agency requires, or
     GTE elects, to offer the Service by tariff, the tariff shall supersede
     this Appendix.  If the Service becomes tariffed, DTI has the right to
     terminate this Appendix upon sixty (60) calendar days' advance written
     notice effective on the effective date of such tariff, without penalty to
     either Party.

4.4  Mileage.  Mileage is calculated on the airline distance between the
     locations involved, using the V&H coordinates method, as set forth in the
     National Exchange Carrier Association, Inc. Tariff, F.C.C. No. 4.

4.5  Rates and Charges.  Rates and charges for each component of the Service
     are described as follows:

      (a)  "A" Link connection - Charges for the "a" Link connection to
           GTE's CCS/SS7 network consist of the STP port termination charges.

            (1)  The STP port termination charges are for the
                 termination of a 56 kbps channel at each STP from DTI's SSP or
                 SP.

            (2)  DTI will lease facilities between its SSPs/SPs
                 and GTE's STPs.

      (b)  "B" Link connection - Charges for the "B" Link connection to
           GTE's CCS/SS7 network consist of the STP port termination charges.

            (1)  The STP port termination charges are for the
                 termination of a 56 kbps channel at each STP from DTI's STPs.

            (2)  DTI and GTE shall mutually agree upon the rates
                 for "B" Link interconnections within thirty (30) calendar days
                 of the execution of this Agreement.

      (c)  STP Interconnection nonrecurring charge - STP interconnection
           nonrecurring charge shall apply for each "A" Link and "B" Link
           interconnection to GTE's SS7 network.

4.6  Rearrangement.  Charges for rearrangement of the Service that are not
     specifically addressed will be determined by GTE on an individual case
     basis.

4.7  Applicable Traffic.  The rates apply only to the traffic of DTI and its
     subtending LECs.  Any traffic from any other party will be subject to
     additional charges.

                               ARTICLE 5.

                          ORDERING THE SERVICE

5.1  Order.  To order the Service, DTI shall submit a completed CCS/SS7 Order
     Form to GTE.  DTI may change its Service order by submitting a new Order
     Form which shall be effective when executed by both Parties.  Service
     shall be implemented for DTI thirty (30) calendar days after the execution
     of this Agreement by both Parties.

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5.2  Port Terminations.  GTE shall reserve STP port terminations only upon
     receipt of a fully executed copy of this Agreement and the Order Form
     referred to in this Appendix.  GTE shall reserve ports on a first come,
     first served basis.  Should DTI fail to use a port within sixty (60)
     Business Days of availability, GTE may reassign the port and, DTI must
     resubmit an Order Form for interconnection.

                               ARTICLE 6.

                        RESPONSIBILITIES OF GTE

6.1  Managing the Network.  GTE is responsible for managing the network
     provided by GTE as part of the Service and applying protective controls
     which it can invoke as a result of occurrences including, but not limited
     to, failure or overload of GTE or DTI facilities due to natural disasters,
     mass calling or national security demands.

6.2  Performance Standards.  GTE is responsible for meeting service
     performance standards as outlined in Bellcore TR-TSV-000905 except as
     otherwise provided herein.

6.3  Invoice.  GTE shall include with the monthly invoice such data GTE and
     DTI mutually agree is necessary for DTI to verify the accuracy of the
     billing it receives from GTE for the Service.

                               ARTICLE 7.

                        RESPONSIBILITIES OF DTI

7.1  Signaling Link.  DTI shall provision the signaling links from its
     premises to the SPOIs in a manner technically compatible to the GTE
     network.

7.2  Privacy Indicator.  DTI shall populate the "privacy indicator" portion of
     the CCS/SS7 initial address message forwarded to GTE's network for call
     processing.

7.3  Accuracy of Information.  DTI shall verify the accuracy of information
     provided by DTI concerning the Service ordered by DTI.

7.4  Forecast.  DTI shall furnish to GTE, at the time the Service is ordered
     and annually thereafter, an updated three year forecast of usage for the
     56 kbps channel and the STP port termination for each STP pair.  The
     forecast shall include total annual volume and busy hour busy month
     volume.  GTE shall utilize the forecast in its own efforts to project
     further facility requirements.

7.5  Changes.  DTI agrees to inform GTE in writing at least thirty (30)
     Business Days in advance of any change in its use of the Service that
     alters by ten percent (10%) or more for any thirty (30) day period the
     volume of signaling transactions to be forwarded to GTE's CCS/SS7 network.
     DTI will provide the reason for the change in volume by individual SS7
     service.

                               ARTICLE 8.

                         SIGNALING POINT CODES

8.1  Interconnection.  DTI may utilize either the GTE CCS/SS7 network SPC or
     its own SPC for interconnection purposes when interconnecting its SPs or
     SSPs at the "A" Link level.  DTI shall utilize its own SPC when
     interconnecting its STP at the "B" Link level.  DTI agrees to obtain its
     own initial SPC if it has short or long range plans to provide its own
     STPs.

8.2  SPC.  When the SPC is utilized, GTE shall be responsible for DTI code
     assignment.  When DTI obtains its own SPC, DTI shall be responsible for
     code assignments and shall be responsible for notifying GTE and other
     CCS/SS7 network providers of such assignments.

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8.3  SPC Change.  Due to the complexities and potential DTI signaling network
     downtime required for changing working SPCs, DTI agrees to give GTE a
     written notice of an SPC change as soon as possible but no later than
     thirty (30) Business Days prior to the effective date of the SPC change.

                               ARTICLE 9.

                            MONTHLY BILLING

Billing statements shall be rendered monthly by GTE to DTI.  The monthly charge
shall be the total of all monthly rate element charges associated with the
Service.  Payment to GTE for bills rendered to DTI shall be due thirty (30)
calendar days after receipt of the invoice and DTI agrees to pay all billed
amounts.  Beginning the day after the due date of the bill, interest charges of
twelve per cent (12%) per annum or the maximum allowed by law, whichever is
less, shall be added to DTI's bill.  Payments shall be applied to the oldest
outstanding amounts first.

                              ARTICLE 10.

                     LIABILITY AND INDEMNIFICATION

10.1 Release from Liability.  Each Party releases the other from any liability
     for loss or damage arising out of errors, interruptions, defects,
     failures, delays, or malfunctions of the Service, including any and all
     associated equipment and data processing systems, not caused by gross
     negligence or willful misconduct.  Any losses or damages for which either
     Party is held liable under this Agreement shall in no event exceed the
     amount of the charges for the Service during the period beginning at the
     time notice of the error, interruption, defect, failure, or malfunction is
     received, to the time Service is restored.

10.2 Limitation of Liability.  IN ADDITION TO THE LIMITATION OF LIABILITY SET
     FORTH AT SECTION 24.4 OF ARTICLE III OF THE AGREEMENT, NEITHER PARTY SHALL
     BE LIABLE FOR ANY LOSS OF REVENUE OR PROFIT OR FOR ANY LOSS OR DAMAGE
     ARISING OUT OF THIS AGREEMENT OR OUT OF THE USE OF THE CCS OR ANY OF THE
     SERVICES PROVIDED UNDER THIS AGREEMENT THAT IS SUFFERED BY THE OTHER
     PARTY, WHETHER ARISING IN CONTRACT, TORT (INCLUDING WITHOUT LIMITATION
     NEGLIGENCE OR STRICT LIABILITY) OR OTHERWISE AND WHETHER OR NOT INFORMED
     OF THE POSSIBILITY OF SUCH DAMAGES IN ADVANCE.  NEITHER PARTY SHALL BE
     LIABLE FOR ANY SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES.

10.3 Third Parties.  Each Party agrees to release, defend, indemnify, and hold
     harmless the other Party from and against any and all losses, damages, or
     other liability, including reasonable attorneys' fees, that it may incur
     as a result of claims, demands, wrongful death actions, or other suits
     brought by third parties, arising out of the use of the Service and
     resulting from the gross negligence or willful misconduct by the
     indemnifying Party, its employees, agents, or contractors in the
     performance of this Agreement.  In addition, to the extent that the
     Parties' interests do not conflict, DTI shall defend GTE against all end
     users' claims just as if DTI had provided such service to its end users
     with its own employees.  In any event, DTI shall assert its tariff
     limitation of liability for the benefit of both GTE and DTI.

10.4 Infringement.  Each Party agrees to release, defend, indemnify, and hold
     harmless the other Party from and against any claim, demands or suit that
     asserts any infringement or invasion of privacy or confidentiality of any
     person(s), caused or claimed to be caused, directly or indirectly, by the
     indemnifying Party's employees or equipment associated with provision of
     the Service.  This includes, but is not limited to, suits arising from
     disclosure of any customer-specific information associated with either the
     originating or terminating numbers used to provision the Service.

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10.5 No Warranties.  IN ADDITION TO THE DISCLAIMER SET FORTH AT SECTION 24.3
     OF ARTICLE III OF THE AGREEMENT, NEITHER GTE NOR DTI MAKES ANY
     REPRESENTATIONS OR WARRANTIES TO THE OTHER OR TO ANY THIRD PARTY
     CONCERNING THE SPECIFIC QUALITY OF ANY SERVICES PROVIDED UNDER OR IN
     CONNECTION WITH THIS APPENDIX, THAT THE SERVICES PROVIDED UNDER THIS
     APPENDIX WILL BE ERROR FREE OR THAT THE FACILITIES WILL OPERATE WITHOUT
     INTERRUPTION.  GTE AND DTI DISCLAIM, WITHOUT LIMITATION, ANY WARRANTY OR
     GUARANTEE OF MERCHANTABILITY OR FITNESS FOR a PARTICULAR PURPOSE, ARISING
     FROM COURSE OF PERFORMANCE, COURSE OF DEALING OR FROM USAGES OF TRADE.

                              ARTICLE 11.

                         RESERVATION OF RIGHTS

11.1 Rights Reserved.  By entering into this Appendix to the Agreement,
     neither Party waives, releases or compromises any rights it may have to
     argue, in any federal or state regulatory proceeding (or in any judicial
     appeal following such a proceeding), in support of, or in opposition to
     any position, including but not limited to:  (a) Accounting for
     deregulated (or detariffed) data base services; (b) removal from regulated
     accounts of expenses and investment associated with deregulated (or
     detariffed) data base services; and (c) any other issue pertinent to
     regulation or deregulation of costs which were, are now, or may in the
     future be, associated with the provisions of data base services.  Each
     Party expressly reserves all its rights in connection with such matters.

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                               EXHIBIT A


                           RATES AND CHARGES


                         for Interconnection at

           GTE's                 -                  ,     STP

<TABLE>
<CAPTION>
                                                                  RATES & CHARGES
              Rate Element                            Nonrecurring                  Monthly
<S>  <C>                                                    <C>                        <C>
1.   STP Port Termination for an                            N/a                        N/a
     "A" Link Per Port

2.   STP Port Termination for a "B"                         N/a                        N/a
     Link Per Port

3.   56 Kbps Digital Facility                               N/a                        N/a
     Dedicated Switched Access
     Transport Per Airline Mile

4.   56 Kbps Dedicated Switched                             N/a                        N/a
     Access Line

5.   1.544 Mbps (DS1) High Capacity                         N/a                        N/a
     Digital Facility Dedicated
     Switched Access Transport Per
     Airline Mile

6.   1.544 Mbps (DS1) Dedicated                             N/a                        N/a
     Switched Access Line

7.   Facility Charge for "B" Links                          N/a                        N/a

8.   ISUP Charge per Interconnection                        N/a                        N/a

8.1  For ISUP Service an additional SCP charge shall apply per interconnection.
</TABLE>

                                      J-8

<PAGE>   159




                               APPENDIX K

                       POLE ATTACHMENT AGREEMENT

1.   Parties.

     This agreement (Agreement) is between GTE __________________ INCORPORATED,
     a State of __________________________________  corporation having its
     principal office at ________________ ("GTE"), and ***, a corporation of 
     the State of __________________, having its principal office at __________
     ("Licensee").

2.   Definitions.

2.1  "GTE's poles" or "GTE pole(s)" means a pole or poles solely owned by GTE,
     jointly owned by GTE and another entity, and space on poles obtained by
     GTE through arrangements with the owner(s) thereof.

2.2  "Telecommunications Services" means the offering of telecommunications
     for a fee directly to the public, or to such classes of users as to be
     effectively available directly to the public, regardless of the facilities
     used.

2.3  "Cable Television Services" means the transmission to subscribers of
     off-the-air pickup of broadcast signals or the transmission, without
     separate charge, of locally originated closed circuit television to the
     subscribers of off-the-air service.

2.4  "Attachments" means the equipment reasonably required by Licensee to
     provide its Telecommunications Services or Cable Television Services that
     is placed on GTE's poles.

2.5  "Make-Ready Work" means all work, including, but not limited to,
     rearrangement, removal, or transfer of existing attachments, placement,
     repair, or replacement of poles, or any other changes required to
     accommodate the Licensee's Attachments on a pole.

2.6  "Hazardous Materials" means (i) any substance, material or waste now or
     hereafter defined or characterized as hazardous, extremely hazardous,
     toxic or dangerous within the meaning of the Comprehensive Environmental
     Response, Compensation and Liability Act of 1980, as amended, or any
     similar law, ordinance, statute, rule or regulation of any governmental
     body or authority, (ii) any substance, material or waste now or hereafter
     classified as a contaminant or pollutant under any law, ordinance,
     statute, rule or regulation of any governmental body or authority or (iii)
     any other substance, material or waste, the manufacture, processing,
     distribution, use, treatment, storage, placement, disposal, removal or
     transportation of which is now or hereafter subject to regulation under
     any law, ordinance, statute, rule or regulation of any governmental body
     or authority.

2.7  "Attachment Fee" means the fee assessed per pole and paid by Licensee to
     place Attachments on GTE's poles.

3.   Purpose.

3.1  Licensee represents to GTE that Licensee has a need to occupy, place and
     maintain Attachments on GTE's poles for the purpose of providing
     Telecommunications Services.

3.2  GTE agrees to permit Licensee to occupy, place and maintain its
     Attachments on such GTE poles as GTE may allow pursuant to the terms of
     this Agreement.

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4.   Grant of License.

      GTE grants to Licensee and Licensee accepts from GTE a non-exclusive
      revocable license to occupy, place and maintain in a designated space on
      specified GTE poles Licensee's Attachments on the terms and conditions
      set forth herein.  Licensee shall have no further right, title, or other
      interest in connection with GTE's poles.  GTE shall have the right to
      grant, renew or extend privileges to others not parties to this Agreement
      to occupy, place or maintain Attachments on or otherwise use any or all
      GTE poles.  Nothing herein is intended to, nor should it be construed to
      require GTE to construct or modify any facilities not needed for its own
      service requirements.  GTE grants this license in reliance on the
      representation of Licensee that Licensee intends to provide
      Telecommunications Services with the Attachments covered by this
      Agreement.

5.   Term.

      Subject to the termination provisions contained in this Agreement, the
      term of this Agreement shall be two (2) years from the effective date
      referenced in the first paragraph of this Agreement and shall continue in
      effect for consecutive one (1) year terms until either Party gives the
      other Party at least ninety (90) calendar days written notice of
      termination, which termination shall be effective at the end of the
      then-current term.  In the event notice is given less than ninety (90)
      calendar days prior to the end of the current term, this Agreement shall
      remain in effect for ninety (90) calendar days after such notice is
      received, provided, that in no case shall the term be extended beyond
      ninety (90) calendar days after the end of the current term.

6.   Pole Attachment Requests (PARs).

6.1  Licensee shall submit a written Pole Attachment Request ("PAR") to GTE
     identifying the GTE poles upon which it desires to place Attachments.
     Each PAR shall be in a form specified by GTE and may be revised from time
     to time by GTE.  All PARs submitted to GTE shall be processed on a first
     come, first served basis.  GTE, in its sole judgment, will determine the
     availability of space on the GTE pole(s) specified in the PAR and will
     provide its response to the PAR within thirty (30) Business Days of its
     submission.  Upon approval of the PAR, GTE shall return one copy thereof
     to Licensee bearing an endorsement acknowledging GTE's authorization.  All
     Attachments placed on GTE's poles pursuant to an approved PAR shall become
     subject to all of the terms and conditions of this Agreement.  Licensee
     may submit subsequent PARs for approval by GTE as needed.  GTE is under no
     obligation to provide general information respecting the location and
     availability of GTE poles, except as may be necessary to process a PAR.
     No Attachment shall be placed on any GTE pole identified in a PAR until
     that PAR has been approved by GTE.

6.2  Licensee shall pay GTE a fee for processing a PAR to compensate GTE for
     the general administrative costs as well as the actual engineering costs
     reasonably incurred.  The fee for engineering costs shall be computed by
     multiplying the fully loaded hourly rate for an engineer times the number
     of hours reasonably required by each engineer to inspect the GTE poles
     included in the PAR.  GTE will charge its then current rates for
     administrative and engineering costs, as may be changed from time to time
     by GTE to remain consistent with prevailing costs.

6.3  Upon receiving an approved PAR, Licensee shall have the right, subject to
     the terms of this License, to place and maintain the facilities described
     in the PAR in the space designated on the GTE poles identified therein.

6.4  In the event Make-Ready Work is necessary to accommodate Licensee's
     Attachments, GTE shall notify Licensee of such fact and provide Licensee
     with a good faith estimate of the total cost of such Make-Ready Work
     needed to accommodate Licensee's Attachments.  Within fifteen (15)

                                      K-2
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      days after receiving such notice from GTE, Licensee shall notify GTE
      either (1) that Licensee shall pay all of the costs actually incurred to
      perform the Make-Ready Work and shall pay the total estimated amount to
      GTE at least ten (10) days prior to the date the Make-Ready Work is to
      begin or (2) that it desires to cancel its PAR.

6.5  GTE shall not be responsible to Licensee for any loss sustained by
     Licensee by reason of the refusal or failure of any other party with
     attachments on GTE's poles to rearrange or modify its attachments as may
     be required to accommodate Licensee's Facilities.

6.6  Licensee is not authorized and shall have no right to place facilities on
     any GTE pole unless that GTE pole is identified in an approved PAR.

7.   Availability of Information Regarding Space on Poles.

      GTE will provide information regarding the availability of pole space
      within thirty (30) Business Days of a written request by Licensee.
      Because GTE will endeavor to determine available space as quickly as
      possible, a shorter interval may be experienced for requests of a limited
      scope where physical field verification is not necessary.  In the event
      the thirty (30) Business Day time frame cannot be met, GTE shall so
      advise Licensee and shall seek a mutually satisfactory alternative
      response date.  No representation regarding the availability of space
      shall be made in the absence of a physical field verification.

8.   Authority to Place Attachments.

8.1  Before Licensee places any Attachments on GTE's poles pursuant to an
     approved PAR, Licensee shall submit evidence satisfactory to GTE of its
     authority to erect and maintain the facilities to be placed on GTE's poles
     within the public streets, highways and other thoroughfares or on private
     property.  Licensee shall be solely responsible for obtaining all
     rights-of-way, easements, licenses, authorizations, permits and consents
     from federal, state and municipal authorities or private property owners
     that may be required to place Attachments on GTE's poles.  In the event
     Licensee must obtain any additional easements, permits, approvals,
     licenses and/or authorizations from any governmental authority or private
     individual or entity in order to utilize GTE's poles under an approved
     PAR, GTE shall, upon Licensee's request, provide written confirmation of
     its consent to Licensee's utilization of poles in a particular location in
     accordance with this Agreement, if needed by Licensee to obtain such
     additional approvals or authorizations.  GTE shall also provide maps or
     drawings of its facilities' locations to the extent reasonably required by
     such governmental authority or private individual or entity for purposes
     of considering or granting Licensee's request to it for authority or
     approval.

8.2  GTE shall not unreasonably intervene in or attempt to delay the granting
     of any rights-of-way, easements, licenses, authorizations, permits and
     consents from federal, state or municipal authorities or private property
     owners that may be required for Licensee to place its Attachments on GTE's
     poles.

8.3  If any right-of-way, easement, license, authorization, permit or consent
     obtained by Licensee is subsequently revoked or denied for any reason,
     Licensee's permission to attach to GTE's poles shall terminate immediately
     and Licensee shall promptly remove its Attachments.  Should Licensee fail
     to remove its Attachments within one hundred twenty (120) days of
     receiving notice to do so from GTE, GTE shall have the option to remove
     all such Attachments and store them in a public warehouse or elsewhere at
     the expense of and for the account of Licensee without GTE being deemed
     guilty of trespass or conversion, and without GTE becoming liable for any
     loss or damages to Licensee occasioned thereby.  All costs incurred by GTE
     to remove Licensee's Attachments shall be reimbursed to GTE by Licensee
     upon demand.

                                      K-3
<PAGE>   162




8.4  Upon notice from GTE to Licensee that the cessation of the use of any one
     or more of GTE's poles is necessary for reasons of safety or has been
     directed by any federal, state or municipal authority, or private property
     owner, permission to attach to such pole or poles shall terminate
     immediately and Licensee promptly shall remove its Attachments.  Should
     Licensee fail to remove its Attachments within the time frame provided by
     the requesting or directing party or one hundred twenty (120) days of
     receiving notice to do so from GTE, whichever is less, GTE shall have the
     option to remove all such Attachments and store them in a public warehouse
     or elsewhere at the expense of and for the account of Licensee without GTE
     being deemed guilty of trespass or conversion, and without GTE becoming
     liable for any loss or damages to Licensee occasioned thereby.  All costs
     incurred by GTE to remove Licensee's Attachments shall be reimbursed to
     GTE by Licensee upon demand by GTE.

9.   Placement of Attachments.

9.1  Licensee shall, at its own expense, place and maintain its Attachments on
     GTE's poles in accordance with (I) such requirements and specifications as
     GTE shall from time to time prescribe in writing, (ii) all rules or orders
     now in effect or that hereafter may be issued by any regulatory agency or
     other authority having jurisdiction, and (iii) all currently applicable
     requirements and specifications of the National Electrical Safety Code,
     and the applicable rules and regulations of the Occupational Safety and
     Health Act.  Licensee agrees to comply, at its sole risk and expense, with
     all specifications included in Exhibits ________ through _______ hereto, as
     may be revised from time to time by GTE.

9.2  Licensee's Facilities shall be tagged at maximum intervals of 300 feet so
     as to identify Licensee as the owner of the Facilities.  The tags shall be
     of sufficient size and lettering so as to be easily read from ground
     level.

10.  Failure of Licensee to Place Attachments.

      Once Licensee has obtained an approved PAR, Licensee shall have sixty
      (60) days from the date the PAR is approved to begin the placement of its
      Attachments on the GTE poles covered by the PAR.  If Licensee has not
      begun placing its Attachments within that sixty (60) day period, Licensee
      shall so advise GTE with a written explanation for the delay.  If
      Licensee fails to advise GTE of its delay, with a written explanation
      therefor, or if Licensee fails to act in good faith by not making a bona
      fide effort to begin placing its Attachments within the sixty (60) days
      prescribed by this Section, the previously approved PAR shall be deemed
      rescinded by GTE and Licensee shall have no further right to place
      Attachments pursuant to that PAR.

11.  Attachment Fees.

11.1 Licensee shall pay to GTE an Attachment Fee, as specified in Exhibit
     hereto, for each GTE pole upon which Licensee obtains authorization to
     place an Attachment.  The Attachment Fee may be increased by GTE from time
     to time as permitted by law upon sixty (60) days written notice to
     Licensee.

11.2 Attachments Fees shall become due and payable on the date a PAR is
     approved by GTE for all GTE poles identified in that PAR on a pro rata
     basis until the end of the then current year and thereafter on an annual
     basis within thirty (30) days of the date of a statement from GTE
     specifying the fees to be paid.  Any payment after thirty (30) days shall
     bear interest at the rate of eighteen percent (18%) per annum or the
     maximum rate allowed by law, whichever is less.

11.3 GTE shall maintain an inventory of the total number of GTE poles occupied
     by Licensee based upon the cumulative number of poles specified in all
     PARs approved by GTE.  GTE may, at its

                                      K-4
<PAGE>   163




      option, conduct a physical inventory of Licensee's Attachments under this
      Section.  It shall be Licensee's sole responsibility to notify GTE of any
      and all removals of Attachments from GTE's poles.  Except as provided in
      Section 18 of this Agreement in connection with the termination of this
      Agreement, such notice shall be provided to GTE at least thirty (30) days
      prior to the removal of the Attachments.  Each Notice of Removal shall be
      in a form specified by GTE and may be revised from time to time at GTE's
      sole discretion.  Licensee shall remain liable for Attachment Fees until
      Licensee's Attachments have been physically removed from GTE's poles.

12.  Modifications, Additions or Replacements to Existing Attachments.

12.1 Licensee shall not modify, add to or replace Facilities on any
     pre-existing Attachment without first notifying GTE in writing of the
     intended modification, addition or replacement at least thirty (30) days
     prior to the date the activity is scheduled to begin.  The required
     notification shall include:  (1) the date the activity is scheduled to
     begin, (2) a description of the planned modification, addition or
     replacement, (3) a representation that the modification, addition or
     replacement will not require any space other than the space previously
     designated for Licensee's Attachments, and (4) a representation that the
     modification, addition or replacement will not impair the structural
     integrity of the poles involved.

12.2 Should GTE determine that the modification, addition or replacement
     specified by Licensee in its notice will require more space than that
     allocated to Licensee or will require the reinforcement of, replacement of
     or an addition of support equipment to the poles involved in order to
     accommodate Licensee's modification, addition or replacement, GTE will so
     notify Licensee, whereupon Licensee will be required to submit a PAR in
     compliance with this Agreement in order to obtain authorization for the
     modification, addition or replacement of its Attachments.

12.3 Access to GTE's poles for repairs, modifications, additions, or
     replacements required in emergency situations shall be governed by Section
     22 of this Agreement.

12.4 Should Licensee request GTE to expand capacity or purchase additional
     plant, Licensee agrees to pay all costs.

13.  Rearrangements to Accommodate Other Licensees.

      Licensee acknowledges that at some point in the future it may become
      necessary to rearrange Licensee's Facilities in order to create space to
      accommodate the facilities of another licensee.  Licensee agrees that in
      such event Licensee will cooperate in good faith with such other licensee
      to come to a mutually agreeable understanding regarding the manner in
      which the rearrangement of Licensee's Facilities will be achieved.

14.  Unauthorized Attachments.

14.1 The parties agree that because it would be impracticable and extremely
     difficult to determine the actual amount of damages resulting from
     Licensee's unauthorized Attachment(s), a charge equal to five (5) times
     the amount of the then current Attachment Fee shall be paid by Licensee to
     GTE for each unauthorized Attachment to a GTE pole.  Such payment shall be
     deemed liquidated damages and not a penalty.  Licensee also shall pay GTE
     an Attachment Fee for each unauthorized Attachment accruing from the date
     the unauthorized Attachment was first placed on the GTE pole.  In the
     event that the date the unauthorized Attachment was first placed on a GTE
     pole cannot be determined, such date shall be deemed the date of the last
     physical inventory made in accordance with this Agreement or, if no
     physical inventory has been conducted, the date the first PAR from
     Licensee was approved in accordance with this Agreement.  Licensee also
     shall pay to GTE all costs incurred by GTE to rearrange any

                                      K-5
<PAGE>   164




      unauthorized Attachment(s) of Licensee if such rearrangement is required
      to safeguard GTE's Attachment(s) or to accommodate the Attachment(s) of
      another party whose Attachment(s) would not have required a rearrangement
      but for the presence of Licensee's unauthorized Attachment(s).  Licensee
      shall also pay to GTE all costs incurred by GTE to reinforce, replace or
      modify any GTE pole, which reinforcement, replacement or modification was
      required as a result of the unauthorized Attachment of Licensee.  The
      Attachment Fee referenced in this subsection 14.1 shall be determined in
      the same manner as such fee would have been determined if the attachment
      had been authorized by GTE.

14.2 For purposes of this section, an unauthorized Attachment shall include,
     but not be limited to:

      14.2.1 An Attachment to a GTE pole which pole is not identified in any
           PAR approved in accordance with this Agreement;

      14.2.2 An Attachment that occupies more space than that allocated to
           Licensee by GTE;

      14.2.3 An Attachment that is not placed in accordance with the provisions
           of this Agreement or the appropriate PAR issued pursuant to this
           Agreement;

      14.2.4 An addition or modification by Licensee to its pre-existing
           Attachment(s) that impairs the structural integrity of the involved
           GTE pole(s).

      14.2.5 An Attachment that consists of facilities owned or controlled by,
           and for the use of a party other than Licensee.

15.  Surveys and Inspections of Pole Attachments.

15.1 Upon written notice to Licensee, the total number and exact location of
     Licensee's Attachments on GTE's poles may be determined, at GTE's
     discretion, through a survey to be made not more than once per calendar
     year by GTE.  If so requested, Licensee and/or any other entity owning or
     jointly owning the poles with GTE may participate in the survey.  The
     costs incurred by GTE to conduct the survey shall be reimbursed to GTE by
     Licensee upon demand by GTE.  If the Attachments of more than one Licensee
     are surveyed, each such Licensee shall contribute a proportionate share of
     the costs reimbursed to GTE.

15.2 Apart from surveys conducted in accordance with this section, GTE shall
     have the right to inspect any Attachment of Licensee on GTE's poles as
     conditions may warrant upon written notice to Licensee.  Licensee shall,
     upon demand by GTE, reimburse GTE all costs incurred to conduct its
     inspection.  No joint survey or inspection, or lack thereof, by GTE shall
     operate to relieve Licensee of any responsibility, obligation or liability
     assumed under this Agreement.

16.  Notice of Modification or Alteration of Poles by GTE.

16.1 In the event GTE plans to modify or alter any GTE pole(s) upon which
     Licensee has Attachments, GTE shall provide Licensee notice of the
     proposed modification or alteration at least thirty (30) days prior to the
     time the proposed modification or alteration is scheduled to take place.
     Should Licensee decide to modify or alter its Attachments on the GTE poles
     to be modified or altered by GTE, Licensee shall so notify GTE in writing.
     In such event, Licensee shall bear a proportionate share of the total
     costs incurred by GTE to make such poles accessible to Licensee.

16.2 In the event GTE is required by a federal, state, or local authority to
     move, replace or change the location of any GTE pole(s), Licensee shall
     concurrently relocate Licensee's Attachments.  GTE

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      and each Licensee required to relocate its Attachments shall bear its own
      costs for such relocation.

17.  Disclaimer of Warranties.

      EXCEPT AS SPECIFICALLY SET FORTH IN THIS AGREEMENT, GTE MAKES NO
      WARRANTIES, EXPRESS OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, ANY
      IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR a PARTICULAR
      PURPOSE.

18.  Default and Remedies.

18.1 The occurrence of any one of the following shall be deemed a Material
     Default by Licensee under this Agreement:

      18.1.1 Failure by Licensee to pay any fee or other sum required to be
           paid under the terms of this Agreement and such default continues
           for a period of ten (10) days after written notice thereof to
           Licensee;

      18.1.2 Failure by Licensee to perform or observe any other term,
           condition, covenant, obligation or provision of this Agreement and
           such default continues for a period of thirty (30) days after
           written notice thereof from GTE (provided that if such default is
           not curable within such thirty (30) day period, the period will be
           extended if Licensee commences to cure such default within such
           thirty (30) day period and proceeds diligently thereafter to effect
           such cure);

      18.1.3 The filing of any tax or mechanic's lien against GTE's poles which
           is not bonded or discharged within thirty (30) days of the date
           Licensee receives notice that such lien has been filed;

      18.1.4 Licensee's voluntary or involuntary bankruptcy;

      18.1.5 Licensee's knowing use or maintenance of its Attachments in
           violation of any law or regulation, or in aid of any unlawful act or
           undertaking;

      18.1.6 If any authorization which may be required of the Licensee by any
           governmental or private authority for the placement, operation or
           maintenance of Licensee's Attachments is denied or revoked.

18.2 In the event of a Material Default, GTE, without any further notice to
     the Licensee (except where expressly provided for below or required by
     applicable law) may do any one or more of the following:

      18.2.1 Perform, on behalf and at the expense of Licensee, any obligation
           of Licensee under this Agreement which Licensee has failed to
           perform and of which GTE shall have given Licensee notice, the cost
           of which performance shall be paid by Licensee to GTE upon demand;

      18.2.2 Terminate this Agreement by giving notice of such termination to
           Licensee and remove Licensee's Attachments and store them in a
           public warehouse or elsewhere at the expense of and for the account
           of Licensee without GTE being deemed guilty of trespass or
           conversion, and without GTE becoming liable for any loss or damages
           to Licensee occasioned thereby; or

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      18.2.3 Exercise any other legal or equitable right or remedy which GTE
           may have.

18.3 Any costs and expenses incurred by GTE (including, without limitation,
     reasonable attorneys' fees) in enforcing this Agreement shall be repaid to
     GTE by Licensee upon demand.

18.4 Upon termination of this Agreement by GTE because of a material default
     by Licensee, Licensee shall remain liable to GTE for any and all fees,
     other payments and damages which may be due or sustained prior to such
     termination, all reasonable costs, fees and expenses, including, without
     limitation, reasonable attorneys' fees incurred by GTE in pursuit of its
     remedies hereunder, and additional liquidated damages which shall be an
     amount equal to one full year of Pole Attachment fees.

18.5 All rights and remedies of each party set forth in this Agreement shall
     be cumulative and none shall exclude any other right or remedy, now or
     hereafter allowed by or available under any statute, ordinance, rule of
     court, or the common law, either at law or in equity, or both.

19.  Indemnification.

19.1 Licensee shall compensate GTE for the full actual loss, damage or
     destruction of GTE's property that in any way arises from or is related to
     this Agreement or activities undertaken pursuant to this Agreement
     (including, without limitation, the installation, construction, operation
     or maintenance of Licensee's Attachments).

19.2 Licensee will further indemnify, defend and hold harmless GTE and GTE's
     agents, officers, employees and assigns, from any and all losses, damages,
     costs, expenses (including, without limitation, reasonable attorneys'
     fees), statutory fines or penalties, actions or claims for personal injury
     (including death), damage to property, or other damage or financial loss
     of whatever nature in any way arising out of or connected with this
     Agreement or activities undertaken pursuant to this Agreement (including,
     without limitation, the installation, construction, operation or
     maintenance of Licensee's Attachments), except to the extent caused by the
     gross negligence or willful misconduct on the part of GTE or GTE's agents,
     officers, employees and assigns.  Licensee further indemnifies GTE from
     subsequent taxes and fees that may be levied by municipalities ROWs in
     association with these agreements.  Such fees that are levied would be in
     addition to the attachment/occupancy fees reflected in this Agreement.
     Licensee expressly assumes all liability for actions brought against GTE
     and GTE's agents, officers, employees and assigns, by Licensee's agents,
     officers or employees and Licensee expressly waives any immunity from the
     enforcement of this indemnification provision that might otherwise be
     provided by workers' compensation law or by other state or federal laws.

19.3 Without limiting any of the foregoing, Licensee assumes all risk of, and
     agrees to relieve GTE of any and all liability for, loss or damage (and
     the consequences of loss or damage) to any Attachments placed on GTE's
     poles and any other financial loss sustained by Licensee, whether caused
     by fire, extended coverage perils, or other casualty, except to the extent
     caused by the gross negligence or willful misconduct on the part of GTE or
     GTE's agents, officers, employees and assigns.

19.4 Without limiting the foregoing, Licensee expressly agrees to indemnify,
     defend and hold harmless GTE and GTE's agents, officers, employees and
     assigns from any and all claims asserted by customers of Licensee in any
     way arising out of or in connection with this Agreement or Licensee's
     Attachments, except to the extent caused by the gross negligence or
     willful misconduct on the part of GTE or GTE's agents, officers, employees
     and assigns.

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19.5 Notwithstanding anything to the contrary in this Agreement, Licensee
     further shall indemnify and hold harmless GTE, its agents, officers,
     employees and assigns from and against any claims, liabilities, losses,
     damages, fines, penalties and costs (including, without limitation,
     reasonable attorneys' fees) whether foreseen or unforeseen, which the
     indemnified parties suffer or incur because of:  (I) any discharge of
     Hazardous Waste resulting from acts or omissions of Licensee or the
     Licensee's predecessor in interest; (ii) acts or omissions of the
     Licensee, it agents, employees, contractors or representatives in
     connection with any cleanup required by law, or (iii) failure of Licensee
     to comply with Environmental, Safety and Health Laws.

19.6 In no event shall either party be liable to the other party for any
     special, consequential or indirect damages (including, without limitation,
     lost revenues and lost profits) arising out this Agreement or any
     obligation arising hereunder, whether in an action for or arising out of
     breach of contract, tort or otherwise.

19.7 Licensee shall indemnify, protect and hold harmless GTE from and against
     any and all claims for libel and slander, copyright and/or patent
     infringement arising directly or indirectly by reason of installation of
     Licensee's equipment on GTE's poles pursuant to this Agreement.

20.  Insurance.

      20.1 Licensee shall carry insurance, at its sole cost and expense,
           sufficient to cover its indemnification obligations as set forth in
           Section 19 of this Agreement.  Such insurance shall include, but not
           be limited to, coverage against liability due to personal injury or
           death of persons in the amount of $500,000 as to any one person and
           $1,000,000 as to any one accident; coverage against liability due to
           property damage in the amount of $500,000 as to each accident and
           $500,000 aggregate; and coverage necessary to fully protect both it
           and GTE from all claims under any worker's compensation laws that
           may be applicable.

      20.2 All insurance required of Licensee under this Agreement shall
           remain in force for the entire life of this Agreement.  The company
           or companies issuing such insurance shall be approved by GTE and GTE
           shall be named as an additional insured in each such policy.
           Licensee shall submit to GTE certificates by each insurer to the
           effect that the insurer has insured Licensee for all potential
           liabilities of Licensee under this Agreement, and that it will not
           cancel or change any policy of insurance issued to Licensee except
           upon thirty (30) days notice to GTE.  In the event Licensee's
           insurance coverage is to be canceled by reason of non-payment of
           premiums due, GTE shall have the option of paying any amount due and
           Licensee shall forthwith reimburse GTE the full amount paid by GTE.

      20.3 Licensee shall promptly advise GTE in writing of any and all
           claims for damages, including, but not limited to, damage to
           property or injury to or death of persons, allegedly arising out of
           or in any manner related, directly or indirectly, to the presence or
           use of Licensee's Attachments.

      20.4 Licensee shall furnish bond or satisfactory evidence of
           contractual insurance coverage, the terms of which shall be subject
           to GTE's approval, in the amount of ten thousand dollars ($10,000)
           to guarantee the payment of any sums which may become due to GTE for
           rentals, inspections or for work performed by GTE for the benefit of
           Licensee under this Agreement, including the removal of Licensee's
           equipment pursuant to any of the provisions hereof.  All bonds must
           specify that GTE be notified thirty (30) days prior to the
           expiration or cancellation of the policy.

                                      K-9
<PAGE>   168




21.  Taxes.

      Any state or local excise, sales, or use taxes (excluding any taxes
      levied on income) resulting from the performance of this Agreement shall
      be borne by the Party upon which the obligation for payment is imposed
      under applicable law, even if the obligation to collect and remit such
      taxes is placed upon the other Party.  The collecting Party shall charge
      and collect from the obligated Party, and the obligated Party agrees to
      pay to the collecting Party, all applicable taxes, except to the extent
      that the obligated Party notifies the collecting Party and provides to
      the collecting Party appropriate documentation as GTE requires that
      qualifies the obligated Party for a full or partial exemption.  Any such
      taxes shall be shown as separate items on applicable billing documents
      between the Parties.  The obligated Party may contest the same in good
      faith, at its own expense, and shall be entitled to the benefit of any
      refund or recovery, provided that such Party shall not permit any lien to
      exist on any asset of the other Party by reason of the contest.  The
      collecting Party shall cooperate in any such contest by the other Party.
      The other Party will indemnify the collecting Party from any sales or use
      taxes that may be subsequently levied on payments by the other Party by
      the collecting Party.

22.  Emergency Restoration Procedures.

      In the event of an emergency, restoration procedures may be affected by
      the presence of Licensee's Attachments.  While GTE shall not be
      responsible for the repair of Licensee's Attachments that are damaged
      (except by mutual written agreement), GTE shall nonetheless control
      access to its poles if the restoration is to be achieved in an orderly
      fashion.

      22.1 Where GTE and Licensee are involved in emergency
           restorations, access to GTE's poles will be controlled by GTE's
           Maintenance District Manager or his/her on-site representative
           according to the following guidelines:

             22.1.1 Service Disruptions/Outages

                  (a)  In the event of service disruptions
                       and/or outages, while exercising its right to first
                       access, GTE shall make all reasonable efforts to grant
                       access to as many other entities with Attachments as is
                       reasonably safe.

                  (b)  Where simultaneous access is not
                       possible, access will be granted by GTE on a first come,
                       first served basis.

             22.1.2 Service Affecting Emergencies

                  (a)  In the event of service affecting
                       emergencies not resulting in service disruptions or
                       outages, while exercising its right to first access, GTE
                       shall make all reasonable efforts to grant access to as
                       many other entities with Attachments as is reasonably
                       safe.

                  (b)  Where GTE is unable to grant
                       simultaneous access to all other entities with
                       Attachments, access will granted according to the level
                       of damage to the Attachments of each entity and the
                       likelihood that a given level of damage will result in
                       service disruption.  Where the likelihood that a service
                       disruption will result is not clearly discernible,
                       access will be on a first come, first served basis.

      22.2 Without limiting any other indemnification or hold harmless
           provisions of this Agreement, Licensee agrees that any decision by
           GTE regarding access to Attachments, or any action

                                      K-10
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             or failure to act by GTE, under this Section 22 shall not
             constitute a basis for any claim by Licensee against GTE for any
             damage to Licensee's Attachments or disruption of Licensee's
             services, or any other direct or indirect damages of any kind
             whatsoever incurred by Licensee.

23.  Damage Suspected to Licensee's Facilities Only.

      23.1 In the event Licensee receives information that Licensee's
           Attachments are damaged, Licensee shall notify GTE of said damage at
           a number to be provided later by GTE.  This is a 24-hour, 7 days per
           week notification number.  Licensee shall provide GTE all
           information known to it regarding the damage to Licensee's
           Attachments.

      23.2 In the event GTE receives notice that Licensee's Facilities
           are damaged, GTE will notify Licensee of said damage by telephone at
           the Licensee's emergency telephone number.  GTE shall provide
           Licensee all information known to it regarding the damage to
           Licensee's Attachments.

      23.3 After the giving of such notice by either Licensee or GTE,
           Licensee shall be authorized to perform emergency restoration
           maintenance activities in connection with Licensee's Attachments,
           subject to the provisions of this Agreement.

      23.4 Without limiting any other indemnification or hold harmless
           provisions of this Agreement, Licensee agrees that any decision by
           GTE regarding access to Licensee's Attachments, or any action or
           failure to act by GTE, appropriately or inappropriately, under this
           Section shall not be the basis for any claim by Licensee against GTE
           for any damage to Licensee's Attachments or disruption of Licensee's
           services, or any other direct or indirect damages of any kind
           whatsoever incurred by Licensee and Licensee shall indemnify and
           hold GTE harmless from any such claim.

24.  Abandonment.

      Nothing in this Agreement shall prevent or be construed to prevent GTE
      from abandoning, selling, assigning or otherwise disposing of any poles
      or other GTE property used for Licensee's Attachments; provided, however,
      that GTE shall condition any such sale, assignment or other disposition
      subject to the rights granted to Licensee pursuant to this Agreement.
      GTE shall promptly notify Licensee of any proposed sale, assignment or
      other disposition of any poles or other GTE property used for Licensee's
      Attachments.

25.  Notices.

      Any written notice to be given to a party to this Agreement shall be in
      writing and given or made by means of telegram, facsimile transmission,
      certified or registered mail, express mail or other overnight delivery
      service, or hand delivery, proper postage or other charges prepaid, and
      addressed or directed to the respective parties as follows:

            To   Licensee:       ___________________________
                                 ___________________________
                                 ___________________________

            To   GTE:            ___________________________
                                 ___________________________
                                 ___________________________

                                      K-11
<PAGE>   170




      Any notice given by personal delivery shall be deemed to have been given
      on the day of actual delivery and, if given by registered or certified
      mail, return receipt requested, on the date of receipt thereof and, if
      given by facsimile transmission, on the day of transmittal thereof if
      given during the normal business hours of the recipient and on the next
      business day if not given during normal business hours.

26.  Non-Waiver of Terms and Conditions.

      No course of dealing, course of performance or failure to enforce any of
      term, right, condition or other provision of this Agreement shall
      constitute or be construed as a waiver of any term, right or condition or
      other provision of this Agreement.

27.  Dispute Resolution.

      27.1 Except in the case of (i) a suit, action or proceeding by GTE
           to compel Licensee to comply with its obligations to indemnify GTE
           pursuant to this Agreement or (ii) a suit, action or proceeding to
           compel either party to comply with the dispute resolution procedures
           set forth in this section, the parties agree to use the following
           procedure to resolve any dispute, controversy or claim arising out
           of or relating to this Agreement or its breach.

      27.2 At the written request of a party, each party shall designate
           a knowledgeable, responsible representative to meet and negotiate in
           good faith to resolve any dispute, controversy or claim arising
           under this Agreement.  The parties intend that these negotiations be
           conducted by non-lawyer, business representatives.  The substance of
           the negotiations shall be left to the discretion of the
           representatives.  Upon mutual agreement, the representatives may
           utilize other alternative dispute resolution procedures such as
           mediation to assist in the negotiations.  Discussions and
           correspondence between the representatives for purposes of these
           negotiations shall be treated as confidential, undertaken for
           purposes of settlement, shall be exempt from discovery and
           production, and shall not be admissible in the arbitration described
           below or in any subsequent lawsuit without the concurrence of all
           parties.  Documents identified in or provided during such
           negotiations, which are not prepared for purposes of the
           negotiations, shall not be so exempt and may, if otherwise
           admissible, be admitted as evidence in any subsequent proceeding.

      27.3 If a resolution of the dispute, controversy or claim is not
           reached within sixty (60) days of the initial written request, the
           dispute, controversy or claim shall be submitted to binding
           arbitration by a single arbitrator pursuant to the rules of the
           American Arbitration Association (AAA), except as hereinafter
           provided.  Discovery in any proceeding before the AAA shall be
           controlled by the arbitrator and shall be permitted to the extent
           set forth in this section.  Parties may exchange, in any
           combination, up to thirty-five (35) (none of which may contain
           subparts) written interrogatories, demands to produce documents and
           requests for admission.  Each party may also to take the oral
           deposition of one (1) witness.  Additional discovery may be
           permitted upon mutual agreement of the parties.  The arbitration
           hearing shall be commenced within sixty (60) days of the demand for
           arbitration and shall be held in the city where GTE's local offices
           are located.  The arbitrator shall rule on the dispute, controversy
           or claim by issuing a written opinion within thirty (30) days after
           the close of hearings.  The times specified in this section may be
           extended upon mutual agreement of the parties or by the arbitrator
           upon a showing of good cause.  Judgment upon the award rendered by
           the arbitrator may be entered in any court having jurisdiction.

      27.4 Each party shall bear its own costs, including attorneys'
           fees, incurred in connection with any of the foregoing procedures.
           A party seeking discovery shall reimburse the responding

                                      K-12
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             party the cost of reproducing documents (to include search time
             and reproduction time costs).  The fees associated with any
             arbitration, including the fees of the arbitrator, shall be
             divided equally between the parties.

28.  Compliance With Laws.

      Notwithstanding anything to the contrary in this Agreement, each party
      shall ensure that any and all activities it undertakes pursuant to this
      Agreement shall comply with all applicable laws, including, without
      limitation, all applicable provisions of (i) workers' compensation laws,
      (ii) unemployment compensation laws, (iii) the Federal Social Security
      Law, (iv) the Fair Labor Standards Act, and (v) all laws, regulations,
      rules, guidelines, policies, orders, permits and approvals of any
      governmental authority relating to environmental matters and/or
      occupational safety.

29.  Force Majeure.

      Neither party shall have any liability for its delays or its failure in
      performance due to fire, flood, explosion, pest damage, power failures,
      strikes or labor disputes, acts of God, the Elements, war, civil
      disturbances, acts of civil or military authorities or the public enemy,
      inability to secure raw materials, transportation facilities, fuel or
      energy shortages, or other cause beyond its control.

30.  Assignment.

      30.1 The rights and obligations of Licensee under this Agreement
           shall not be assigned, transferred or sub-licensed, in whole or in
           part, without the prior written consent of GTE.  An assignment,
           transfer or sub-license of this Agreement by Licensee shall not
           relieve Licensee of its obligations under this Agreement.  Any
           assignment attempted without the prior written consent of GTE shall
           be void.

      30.2 GTE shall have the right to assign this Agreement and to
           assign its rights and delegate its obligations and liabilities under
           this Agreement, either in whole or in part.  GTE shall provide
           notice to Licensee of any assignment which shall state the effective
           date thereof.  Upon the effective date and to the extent of the
           assignment, GTE shall be released and discharged from all
           obligations and liabilities under this Agreement.

      30.3 Neither this Agreement nor any term or provision hereof, nor
           any inclusion by reference shall be construed as being for the
           benefit of any person or entity not a signatory hereto.

      30.4 This Agreement shall be binding upon and inure to the benefit
           of the parties hereto and their respective successors and assigns.

31.  Applicable Law.

      This Agreement, and the rights and obligations contained in it, shall be
      governed and construed under the laws of the State of _________________
      without regard to its conflicts of laws provisions.

32.  Subsequent Law.

      The terms and conditions of this Agreement shall be subject to any and
      all applicable laws, rules, regulations, guidelines, orders, or tariffs
      that are currently in force or that may be prescribed by any federal,
      state or local governmental authority.  The parties agree to modify, in
      writing, the affected term(s) and condition(s) of this Agreement to bring
      them into compliance with such law, rule, regulation, guideline, order,
      or tariff.  Should any term of this Agreement be determined by a

                                      K-13
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      court or other entity with competent jurisdiction to be unenforceable,
      all other terms of this Agreement shall remain in full force and effect.

33.  Headings.

      All headings contained in this Agreement are for convenience only and are
      not intended to affect the meaning or interpretation of any part of this
      Agreement.

34.  Entire Agreement.

      The terms and conditions of this Agreement supersede all prior oral or
      written understandings between the parties and constitute the entire
      agreement between them concerning the subject matter of this Agreement.
      There are no understandings or representations, express or implied, not
      expressly set forth in this Agreement.  This Agreement shall not be
      modified or amended except by a writing signed by the party to be
      charged.

IN WITNESS WHEREOF, the parties hereto have executed this Agreement through
their authorized representatives.

<TABLE>
<S>                                 <C>
For GTE:                            For Licensee:

GTE



- ----------------------------------  -------------------------
(Signature of Authorized Agent)     (Signature of Officer)
(Printed Name of Authorized Agent)  (Printed Name of Officer)
(Title)                             (Title)
(Date)                              (Date)


                                    ATTEST:



                                    Corporate Seal (If Applicable)
</TABLE>

                                      K-14
<PAGE>   173




                                    EXHIBIT


                                ATTACHMENT FEES


                                      K-15

<PAGE>   174




                                   APPENDIX L

                          CONDUIT OCCUPANCY AGREEMENT

1. Parties.

      This agreement (Agreement) is between GTE ______________ INCORPORATED, a
      State of _________________ corporation having its principal office at
      ("GTE"), and ***, a corporation of the State of _____________, having its 
      principal office at ______________________ ("Licensee").

2. Definitions.

      2.1  "GTE's conduit(s)" or "GTE conduit(s)" means any reinforced
           passage or opening in, on, under/over or through the ground capable
           of containing communications facilities.

      2.2  "Telecommunications Services" means the offering of
           telecommunications for a fee directly to the public, or to such
           classes of users as to be effectively available directly to the
           public, regardless of the facilities used.

      2.3  "Cable Television Services" means the transmission to
           subscribers of off-the-air pickup of broadcast signals or the
           transmission, without separate charge, of locally originated closed
           circuit television to the subscribers of off-the-air service.

      2.4  "Conduit" or "Duct" means a single enclosed raceway used to
           house Innerduct.

      2.5  "Innerduct," unless otherwise specified or approved by GTE,
           shall mean a single enclosed raceway 1" or 1-1/4" in diameter,
           placed within duct and used for housing communications facilities.

      2.6  "Facilities" means all facilities, including, but not limited
           to, cables, equipment and associated hardware, owned and utilized by
           the Licensee which occupy an innerduct.

      2.7  "Make-Ready Work" means all work, including, but not limited
           to, rearrangement, removal, or transfer of existing facilities,
           placement, repair, or replacement of duct or innerduct, or any other
           changes required to accommodate the Licensee's Facilities in a
           conduit.

      2.8  "Manholes" and "handholes" mean subsurface enclosures which
           personnel may enter and use for the purpose of installing, operating
           and maintaining communications facilities.

      2.9  "Hazardous Materials" means (I) any substance, material or
           waste now or hereafter defined or characterized as hazardous,
           extremely hazardous, toxic or dangerous within the meaning of the
           Comprehensive Environmental Response, Compensation and Liability Act
           of 1980, as amended, or any similar law, ordinance, statute, rule or
           regulation of any governmental body or authority, (ii) any
           substance, material or waste now or hereafter classified as a
           contaminant or pollutant under any law, ordinance, statute, rule or
           regulation of any governmental body or authority or (iii) any other
           substance, material or waste, the manufacture, processing,
           distribution, use, treatment, storage, placement, disposal, removal
           or transportation of which is now or hereafter subject to regulation
           under any law, ordinance, statute, rule or regulation of any
           governmental body or authority.

      2.10 "Occupancy Fee" means the fee paid by Licensee to GTE per
           linear foot for each innerduct occupied by Licensee's Facilities in
           GTE's Conduit(s).

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<PAGE>   175




3. Purpose.

      Licensee represents to GTE that Licensee has a need to occupy, place and
      maintain communications facilities within GTE's conduit(s) for the
      purpose of providing Telecommunications Service.  GTE agrees to permit
      Licensee to occupy, place and maintain communications facilities within
      GTE's conduit(s) as GTE may allow pursuant to the terms of this
      Agreement.

4. Grant of License.

      GTE grants to Licensee and Licensee accepts from GTE a non-exclusive
      revocable license to occupy, place and maintain in a designated space in
      specified GTE conduits Licensee's Facilities on the terms and conditions
      set forth herein.  Licensee shall have no further right, title, or other
      interest in connection with GTE's conduit(s).  GTE shall have the right
      to grant, renew or extend privileges to others not parties to this
      Agreement to occupy, place and maintain facilities in or otherwise use
      any or all of GTE's conduit(s).  Nothing herein is intended to, nor
      should it be construed to require GTE to construct or modify any
      facilities not needed for its own service requirements.  GTE grants this
      license in reliance on the representation of Licensee that Licensee
      intends to provide Telecommunications Service with Licensee's Facilities
      covered by this Agreement.

5. Term.

      Subject to the termination provisions contained in this Agreement, the
      term of this Agreement shall be two (2) years from the effective date
      referenced in the first paragraph of this Agreement and shall continue in
      effect for consecutive one (1) year terms until either Party gives the
      other Party at least ninety (90) calendar days written notice of
      termination, which termination shall be effective at the end of the
      then-current term.  In the event notice is given less than ninety (90)
      calendar days prior to the end of the current term, this Agreement shall
      remain in effect for ninety (90) calendar days after such notice is
      received, provided, that in no case shall the term be extended beyond
      ninety (90) calendar days after the end of the current term.

6. Conduit Occupancy Requests.

      6.1  Upon execution of this Agreement, Licensee shall have the
           right to submit a written Conduit Occupancy Request ("COR") to GTE
           specifying the GTE conduits in which it desires to place its
           Facilities.  Each COR shall be in a form specified by GTE, which
           form may be revised from time to time by GTE.  CORs received by GTE
           shall be processed on a first come, first served basis.  GTE will
           determine the availability of space for Licensee's Facilities in the
           GTE conduit(s) specified in the COR within thirty (30) Business Days
           of its submission.  Upon approval of the COR, GTE shall return a
           copy thereof to Licensee bearing an endorsement acknowledging GTE's
           authorization.  All of Licensee's Facilities placed in GTE's
           conduit(s) pursuant to an approved COR shall become subject to all
           of the terms and conditions of this Agreement.  Licensee may submit
           subsequent CORs for approval by GTE as needed.  All of Licensee's
           Facilities shall be placed in innerduct unless otherwise approved by
           GTE.  No facilities of any kind shall be placed in any GTE
           conduit(s) identified in a COR until that COR has been approved by
           GTE.

      6.2  Licensee shall pay GTE a fee for processing a COR to
           compensate GTE for the general administrative costs as well as the
           actual engineering costs reasonably incurred.  The fee for
           engineering costs shall be computed by multiplying the fully loaded
           hourly rate for an engineer times the number of hours reasonably
           required by each engineer to inspect the GTE conduits included in
           the COR.  GTE will charge its then current rates for

                                      L-2
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           administrative and engineering costs, as may be changed from time to
           time by GTE to remain consistent with prevailing costs.

      6.3  Upon receiving an approved COR, Licensee shall have the right, 
           subject to the terms of this Agreement, to place and maintain
           Licensee's Facilities described in the COR in the innerducts of the
           GTE conduit(s) identified therein.

      6.4  In the event Make-Ready Work is necessary to accommodate
           Licensee's Facilities, GTE shall notify Licensee of such fact and
           provide Licensee with an estimate of the total cost of such
           Make-Ready Work.  Within fifteen (15) days after receiving such
           notice from GTE, Licensee shall notify GTE either (1) that Licensee
           shall pay all of the costs actually incurred to perform the
           Make-Ready Work and shall pay the total estimated amount to GTE at
           least ten (10) days prior to the date the Make-Ready Work is to
           begin or (2) that it desires to cancel its COR.

      6.5  Nothing herein shall confer any right upon Licensee to place power 
           cables or related power equipment in GTE Conduit(s) or Manholes.  
           Licensee shall place equipment of this nature in its own pull boxes 
           outside of GTE's Conduit(s) or Manholes.  Cable connectors or 
           splicing devices shall not be used by Licensee in GTE's Conduit(s) 
           or innerducts.

7. Availability of Conduit Maps.

      Existing conduit maps will be made available for viewing by Licensee for
      the purpose of pre-order planning at the GTE area engineering offices
      during normal business hours, subject to reasonable advance notification.
      While a formal written request will not be required in connection with
      the first request by Licensee to view conduit maps, GTE reserves the
      right to refuse any subsequent viewing request or require written
      justification for the request if Licensee has demonstrated that it does
      not have a good faith intention to submit a COR.  If the availability of
      specific point-to-point conduits can be determined at the time of viewing
      conduit maps, maps reflecting such point-to-point conduits may be made
      available for copying.  Licensee shall pay to GTE a fee for making such
      copies available sufficient to cover the general administrative costs
      incurred.  IN MAKING CONDUIT MAPS AVAILABLE, GTE WILL BE MAKING NO
      EXPRESS OR IMPLIED WARRANTY REGARDING THEIR ACCURACY OTHER THAN THAT THEY
      ARE THE SAME CONDUIT MAPS USED BY GTE IN ITS DAY-TO-DAY OPERATIONS.

8. Availability of Information Regarding Space In Conduits.

      GTE will provide information regarding the availability of conduit space
      within thirty (30) Business Days of a written request by Licensee.
      Because GTE will endeavor to determine available space as quickly as
      possible, a shorter interval may be experienced for requests of a limited
      scope where physical field verification is not necessary.  In the event
      the thirty (30) Business Day time frame cannot be met, GTE shall so
      advise Licensee and shall seek a mutually satisfactory alternative
      response date.  No representation regarding the availability of space
      shall be made in the absence of a physical field verification.

9. Authority to Place Licensee's Facilities.

      9.1  Before Licensee places any of Licensee's Facilities in GTE's
           conduit(s) pursuant to an approved COR, Licensee, upon request,
           shall submit sufficient evidence to GTE of its authority to maintain
           the Facilities to be placed in GTE's conduit(s) within the public
           streets, highways and other thoroughfares or on private property.
           Licensee shall be solely responsible for obtaining all licenses,
           authorizations, permits and consents from federal,

                                      L-3
<PAGE>   177




            state and municipal authorities or private property owners that may
            be required to place and maintain Licensee's Facilities in GTE's
            conduit(s).

      9.2  GTE shall not attempt to prevent or delay the granting of any
           rights-of-way, easements, licenses, authorizations, permits and
           consents from any federal, state or municipal authorities, or
           private property owners that may be required by Licensee to place
           Licensee's Facilities in GTE's conduit(s).

      9.3  If any right-of-way, easement, license, authorization, permit
           or consent obtained by Licensee is subsequently revoked or denied
           for any reason, Licensee's permission to occupy GTE's conduit(s)
           shall terminate immediately and Licensee shall promptly remove
           Licensee's Facilities.  Should Licensee fail to remove Licensee's
           Facilities within thirty (30) days of receiving notice to do so from
           GTE, GTE shall have the option to remove Licensee's Facilities and
           store them in a public warehouse or elsewhere at the expense of and
           for the account of Licensee without GTE being deemed guilty of
           trespass or conversion, and without GTE becoming liable for any loss
           or damages to Licensee occasioned thereby.  All costs incurred by
           GTE to remove Licensee's Facilities shall be reimbursed to GTE by
           Licensee upon demand.

      9.4  Upon notice from GTE to Licensee that the cessation of the
           use of any portion of GTE's conduit(s) has been ordered or directed
           by any federal, state or municipal authority, or private property
           owner, Licensee's permission to occupy such GTE conduit(s) shall
           terminate immediately and Licensee promptly shall remove Licensee's
           Facilities.  Should Licensee fail to remove Licensee's Facilities
           within thirty (30) days of receiving notice to do so from GTE, GTE
           shall have the option to remove Licensee's Facilities and store them
           in a public warehouse or elsewhere at the expense of and for the
           account of Licensee without GTE being deemed guilty of trespass or
           conversion, and without GTE becoming liable for any loss or damages
           to Licensee occasioned thereby.  All costs incurred by GTE to remove
           Licensee's Facilities shall be reimbursed to GTE by Licensee upon
           demand by GTE.

10. Placement of Licensee's Facilities.

      10.1 Licensee shall, at its sole expense, place and maintain
           Licensee's Facilities in GTE's conduit(s) in accordance with (I)
           such requirements and specifications as GTE shall from time to time
           prescribe in writing, (ii) all rules or orders now in effect or that
           hereafter may be issued by any regulatory agency or other authority
           having jurisdiction, and (iii) all currently applicable requirements
           and specifications of the National Electrical Safety Code, and the
           applicable rules and regulations of the Occupational Safety And
           Health Act.  Licensee agrees to comply, at its sole risk and
           expense, with all specifications included in Exhibits______
           through_________hereto, as may be revised from time to time by GTE.

      10.2 Licensee's Facilities shall be tagged at each manhole so as
           to identify Licensee as the owner of the Facilities.  The tags shall
           be of sufficient size and lettering so as to be easily read.

11. Failure of Licensee to Occupy Conduit Space.

      Upon approval of a COR, Licensee shall have sixty (60) days in which to
      begin the placement of Licensee's Facilities in the GTE conduit(s)
      covered by the COR.  If Licensee has not begun placing its Facilities
      within that sixty (60) day period, Licensee shall so advise GTE with a
      written explanation for the delay.  If Licensee fails to advise GTE of
      its delay, with a written explanation

                                      L-4
<PAGE>   178




      therefor, or if Licensee fails to act in good faith by not making a bona
      fide effort to begin placing its Facilities within the sixty (60) days
      prescribed by this Section, the previously approved COR shall be deemed
      rescinded by GTE and Licensee shall have no further right to place
      Licensee's Facilities pursuant to that COR.

12. Occupancy Fees.

      12.1 Licensee shall pay to GTE an Occupancy Fee, as specified in
           Exhibit_________hereto, for each linear foot of innerduct occupied
           by Licensee's Facilities in GTE's conduit(s).  If Licensee's
           Facilities occupy more than one innerduct, a separate Occupancy Fee
           shall be paid by Licensee for each innerduct occupied.  The
           Occupancy Fee specified in Exhibit_________hereto is the fee
           applicable to 1" or 1-1/4" diameter innerduct.  GTE reserves the
           right to charge a higher fee for innerduct of greater diameter.  The
           Occupancy Fee may be increased by GTE from time to time as permitted
           by law upon sixty (60) days written notice to Licensee.

      12.2 Occupancy Fees shall become due and payable on the date a COR
           is approved by GTE for all GTE innerducts identified in that COR on
           a pro rata basis until the end of the calendar year and thereafter
           on an annual basis within thirty (30) days of the receipt of a
           statement from GTE specifying the fees to be paid.  Any payment
           after thirty (30) days shall bear interest at the rate of eighteen
           percent (18%) per annum or the maximum rate allowed by law,
           whichever is less.

      12.3 GTE shall maintain an inventory of the total linear footage
           of innerduct occupied by Licensee's Facilities in GTE's conduit(s)
           based upon the cumulative linear footage per innerduct from all CORs
           approved by GTE.  GTE may, at its option, conduct a physical
           inventory of Licensee's Facilities for purposes of determining the
           Occupancy Fees to be paid by Licensee under this section.  It shall
           be Licensee's sole responsibility to notify GTE of any and all
           removals of Licensee's Facilities from GTE's conduit(s).  Written
           notice of such removals (unless they are covered by Section 17 of
           this Agreement) shall be provided to GTE at least thirty (30) days
           prior to the removal.  Each Notice of Removal shall be in a form
           specified by GTE.  Licensee shall remain liable for all Occupancy
           Fees until Licensee's Facilities have been physically removed from
           GTE's conduits.

13. Modifications, Additions or Replacements of Licensee's Facilities.

      13.1 Licensee shall not modify, add to or replace Licensee's
           Facilities in any GTE conduit(s) without first notifying GTE in
           writing of the intended modification, addition or replacement at
           least thirty (30) days prior to the date the activity is scheduled
           to begin.  The required notification shall include:  (1) the date
           the activity is scheduled to begin, (2) a description of the planned
           modification, addition or replacement, (3) a representation that the
           modification, addition or replacement will not require any space
           other than the space previously designated for Licensee's
           Facilities, and (4) a representation that the modification, addition
           or replacement will not impair the structural integrity of the GTE
           conduit(s) involved.

      13.2 Should GTE determine that the modification, addition or
           replacement specified by Licensee in its notice will require more
           space than that allocated to Licensee or will require any
           modification, replacement or reinforcement of the GTE conduit(s)
           involved in order to accommodate Licensee's modification, addition
           or replacement, GTE will so notify Licensee, whereupon Licensee
           shall be required to submit a COR in compliance with this Agreement
           in order to obtain authorization for the modification, addition or
           replacement of Licensee's Facilities.

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      13.3 Access to GTE's conduit(s) for repairs, modifications,
           additions, or replacements required in emergency situations shall be
           governed by the provisions of Section 21 of this Agreement.

14. Unauthorized Occupancy of GTE Conduit.

      14.1 It is agreed that a charge equal to five (5) times the amount
           of the then current Occupancy Fee shall be paid by Licensee to GTE
           for each unauthorized occupancy of GTE's conduit(s) by Licensee.
           Such payment shall be deemed liquidated damages and not a penalty.
           Licensee also shall pay GTE an Occupancy Fee for each unauthorized
           occupancy accruing from the date the unauthorized occupancy first
           began.  In the event that the date the unauthorized occupancy first
           began cannot be determined, such date shall be deemed the date of
           the last physical inventory made in accordance with this Agreement
           or, if no physical inventory has been conducted, the date the first
           COR from Licensee was approved in accordance with this Agreement.
           Licensee also shall pay to GTE all costs incurred by GTE to
           rearrange Licensee's Facilities that are unauthorized if such
           rearrangement is required to safeguard GTE's facilities or to
           accommodate the facilities of another party whose facilities would
           not have required a rearrangement but for the presence of Licensee's
           unauthorized facilities.  Licensee also shall pay to GTE all costs
           incurred by GTE to reinforce, replace or modify any GTE conduit(s),
           which reinforcement, replacement or modification is required as a
           result of the unauthorized occupancy by Licensee.  The Occupancy Fee
           referenced in this subsection 14.1 shall be determined in the same
           manner as such a fee would have been determined if the occupancy had
           been authorized by GTE.

      14.2 For purposes of this section, an unauthorized occupancy shall
           include, but not be limited to:

            14.2.1 The presence of Licensee's Facilities in any GTE conduit
                 which conduit is not identified in any COR approved in
                 accordance with this Agreement;

            14.2.2 The presence of Licensee's Facilities in any GTE conduit
                 that occupies more space than that allocated to Licensee by
                 GTE;

            14.2.3 Licensee's Facilities that are not placed in accordance with
                 the provisions of this Agreement or the appropriate COR issued
                 pursuant to this Agreement;

            14.2.4 An addition or modification by Licensee to its pre-existing
                 Facilities in any GTE conduit that impairs the structural
                 integrity of that GTE conduit.

            14.2.5 The presence of facilities in GTE's conduit(s) placed by
                 Licensee that are owned or controlled by and for the use of a
                 party other than Licensee.

15. Modification or Alteration GTE Conduits.

      15.1 In the event GTE plans to modify or alter any GTE conduit(s)
           that house Licensee's Facilities, GTE shall provide Licensee notice
           of the proposed modification or alteration at least fourteen (14)
           days prior to the time the proposed modification or alteration is
           scheduled to take place.  Should Licensee decide to modify or alter
           Licensee's Facilities in the GTE conduit(s) to be modified or
           altered by GTE, Licensee shall so notify GTE in

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           writing.  In such event, Licensee shall bear a proportionate share of
           the total costs incurred by GTE to make the GTE conduit(s)
           accessible.  Licensee's proportionate share of the total cost shall
           be based on the ratio of the amount of new space occupied by Licensee
           to the total amount of new space occupied by all of the parties
           joining in the modification.

      15.2 In the event GTE moves, replaces or changes the location,
           alignment or grade of GTE's conduit(s) ("relocation") for reasons
           beyond GTE's control, Licensee concurrently shall relocate
           Licensee's Facilities.  Licensee shall be solely responsible for the
           costs of the relocation of Licensee's Facilities.

16. Disclaimer of Warranties.

      EXCEPT AS SPECIFICALLY SET FORTH IN THIS AGREEMENT, GTE MAKES NO
      WARRANTIES, EXPRESS OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, ANY
      IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR a PARTICULAR
      PURPOSE.

17. Default and Remedies.

      17.1 The occurrence of any one of the following shall be deemed a
           Material Default by Licensee under this Agreement:

      17.1.1 Failure by Licensee to pay any fee or other sum required to be
            paid under the terms of this Agreement and such default continues
            for a period of five (5) days after written notice thereof to
            Licensee;

      17.1.2 Failure by Licensee to perform or observe any other term,
            condition, covenant, obligation or provision of this Agreement and
            such default continues for a period of thirty (30) days after
            written notice thereof from GTE (provided that if such default is
            not curable within such thirty (30) day period, the period will be
            extended if Licensee commences to cure such default within such
            thirty (30) day period and proceeds diligently thereafter to effect
            such cure);

      17.1.3 The filing of any tax or mechanic's lien against any GTE
            conduit(s) which is not bonded or discharged within thirty (30) days
            of the date Licensee receives notice that such lien has been filed;

      17.1.4 Licensee's voluntary or involuntary bankruptcy;

      17.1.5 Licensee's knowing use or maintenance of Licensee's Facilities in
            violation of any law or regulation, or in aid of any unlawful act or
            undertaking;

      17.1.6 If any authorization which may be required of the Licensee by any
            governmental or private authority for the placement, operation or
            maintenance of Licensee's Facilities is denied or revoked.

      17.2 In the event of a Material Default, GTE, without any further
           notice to the Licensee (except where expressly provided for below or
           required by applicable law) may do any one or more of the following:

            17.2.1 Perform, on behalf and at the expense of Licensee, any
                  obligation of Licensee under this Agreement which Licensee 
                  has failed to perform and of which GTE shall have given 
                  Licensee notice, the cost of which performance shall be paid 
                  by Licensee to GTE upon demand;

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<PAGE>   181




            17.2.2 Terminate this Agreement by giving notice of such
                  termination to Licensee and remove Licensee's Facilities and
                  store them in a public warehouse or elsewhere at the expense
                  of and for the account of Licensee without GTE being deemed
                  guilty of trespass or conversion, and without GTE becoming
                  liable for any loss or damages to Licensee occasioned 
                  thereby; or

            17.2.3 Exercise any other legal or equitable right or remedy which
                  GTE may have.

      17.3 Any costs and expenses incurred by GTE (including, without
           limitation, reasonable attorneys' fees) in enforcing this Agreement
           shall be paid to GTE by Licensee upon demand.

      17.4 Upon termination of this Agreement by GTE, Licensee shall remain 
           liable to GTE for any and all fees, other payments and damages which
           may be due or sustained prior to such termination, all reasonable 
           costs, fees and expenses, including, without limitation, reasonable 
           attorneys' fees incurred by GTE in pursuit of its remedies 
           hereunder, and additional liquidated damages which shall be an 
           amount equal to one full year of Occupancy Fees.

      17.5 All rights and remedies of GTE set forth in this Agreement shall be 
           cumulative and none shall exclude any other right or remedy, now or 
           hereafter allowed by or available under any statute, ordinance, rule 
           of court, or the common law, either at law or in equity, or both.

18. Indemnification.

      18.1 Licensee shall compensate GTE for the full actual loss, damage or 
           destruction of GTE's property that in any way arises from or is 
           related to this Agreement or activities undertaken pursuant to this 
           Agreement (including, without limitation, the installation, 
           construction, operation or maintenance of Licensee's Facilities).

      18.2 Licensee will further indemnify, defend and hold harmless GTE and 
           GTE's agents, officers, employees and assigns, from any and all 
           losses, damages, costs, expenses (including, without limitation,
           reasonable attorneys' fees), statutory fines or penalties, actions
           or claims for personal injury (including death), damage to property,
           or other damage or financial loss of whatever nature in any way
           arising out of or connected with this Agreement or activities
           undertaken pursuant to this Agreement (including, without
           limitation, the installation, construction, operation or maintenance
           of Licensee's Facilities), except to the extent caused by the
           negligence or willful misconduct on the part of GTE or GTE's agents,
           officers, employees and assigns.  Licensee further indemnifies GTE
           from subsequent taxes and fees that may be levied by municipalities
           ROWs in association with these agreements.  Such fees that are
           levied would be in addition to the attachment/occupancy fees
           reflected in this Agreement.  Licensee expressly assumes all
           liability for actions brought against GTE and GTE's agents,
           officers, employees and assigns, by Licensee's agents, officers or
           employees and Licensee expressly waives any immunity from the
           enforcement of this indemnification provision that might otherwise
           be provided by workers' compensation law or by other state or
           federal laws.

      18.3 Without limiting any of the foregoing, Licensee assumes all risk 
           of, and agrees to relieve GTE of any and all liability for, loss or 
           damage (and the consequences of loss or damage) to any of 
           Licensee's Facilities placed in any GTE conduit(s) and any other 
           financial loss sustained by Licensee, whether caused by fire,
            extended coverage perils, or other casualty,

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            except to the extent caused by the negligence or willful misconduct
            on the part of GTE or GTE's agents, officers, employees and
            assigns.

      18.4 Without limiting the foregoing, Licensee expressly agrees to
           indemnify, defend and hold harmless GTE and GTE's agents, officers,
           employees and assigns from any and all claims asserted by customers
           of Licensee in any way arising out of or in connection with this
           Agreement or Licensee's Attachments, except to the extent caused by
           the negligence or willful misconduct on the part of GTE or GTE's
           agents, officers, employees and assigns.

      18.5 Notwithstanding anything to the contrary in this Agreement,
           Licensee further shall indemnify and hold harmless GTE, its agents,
           officers, employees and assigns from and against any claims,
           liabilities, losses, damages, fines, penalties and costs (including,
           without limitation, reasonable attorneys' fees) whether foreseen or
           unforeseen, which the indemnified parties suffer or incur because
           of:  (i) any discharge of Hazardous Waste resulting from acts or
           omissions of Licensee or the Licensee's predecessor in interest;
           (ii) acts or omissions of the Licensee, it agents, employees,
           contractors or representatives in connection with any cleanup
           required by law, or (iii) failure of Licensee to comply with
           Environmental, Safety and Health Laws.

      18.6 In no event shall GTE be liable to Licensee for any special,
           consequential or indirect damages (including, without limitation,
           lost revenues and lost profits) arising out this Agreement or any
           obligation arising hereunder, whether in an action for or arising
           out of breach of contract, tort or otherwise.

      18.7 Licensee shall indemnify, protect and hold harmless GTE from
           and against any and all claims for libel and slander, copyright
           and/or patent infringement arising directly or indirectly by reason
           of installation of Licensee's equipment in GTE's Ducts pursuant to
           this Agreement.

19. Insurance.

      19.1 Licensee shall carry insurance, at its sole cost and expense,
           sufficient to cover its indemnification obligations as set forth in
           Section 18 of this Agreement.  Such insurance shall include, but not
           be limited to, coverage against liability due to personal injury or
           death of persons in the amount of $500,000 as to any one person and
           $1,000,000 as to any one accident; coverage against liability due to
           property damage in the amount of $500,000 as to each accident and
           $500,000 aggregate; and coverage necessary to fully protect both it
           and GTE from all claims under any worker's compensation laws that
           may be applicable.

      19.2 All insurance required of Licensee under this Agreement shall
           remain in force for the entire life of this Agreement.  The company
           or companies issuing such insurance shall be approved by GTE and GTE
           shall be named as an additional insured in each such policy.
           Licensee shall submit to GTE certificates by each insurer to the
           effect that the insurer has insured Licensee for all potential
           liabilities of Licensee under this Agreement, and that it will not
           cancel or change any policy of insurance issued to Licensee except
           upon thirty (30) days notice to GTE.  In the event Licensee's
           insurance coverage is to be canceled by reason of non-payment of
           premiums due, GTE shall have the option of paying any amount due and
           Licensee shall forthwith reimburse GTE the full amount paid by GTE.

      19.3 Licensee shall promptly advise GTE in writing of any and all
           claims for damages, including, but not limited to, damage to
           property or injury to or death of persons, allegedly arising out of
           or in any manner related, directly or indirectly, to the presence or
           use of Licensee's Facilities.

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      19.4 Licensee shall furnish bond or satisfactory evidence of
           contractual insurance coverage, the terms of which shall be subject
           to GTE's approval, in the amount of ten thousand dollars ($10,000)
           to guarantee the payment of any sums which may become due to GTE for
           rentals, inspections or for work performed by GTE for the benefit of
           Licensee under this Agreement, including the removal of Licensee's
           equipment pursuant to any of the provisions hereof.  All bonds must
           specify that the GTE be notified thirty (30) days prior to the
           expiration or cancellation of the policy.

20. Taxes.

      Any state or local excise, sales, or use taxes (excluding any taxes
      levied on income) resulting from the performance of this Agreement shall
      be borne by the Party upon which the obligation for payment is imposed
      under applicable law, even if the obligation to collect and remit such
      taxes is placed upon the other Party.  The collecting Party shall charge
      and collect from the obligated Party, and the obligated Party agrees to
      pay to the collecting Party, all applicable taxes, except to the extent
      that the obligated Party notifies the collecting Party and provides to the
      collecting Party appropriate documentation as GTE requires that qualifies
      the obligated Party for a full or partial exemption.  Any such taxes
      shall be shown as separate items on applicable billing documents between
      the Parties.  The obligated Party may contest the same in good faith, at
      its own expense, and shall be entitled to the benefit of any refund or
      recovery, provided that such Party shall not permit any lien to exist on
      any asset of the other Party by reason of the contest.  The collecting
      Party shall cooperate in any such contest by the other Party.  The other
      Party will indemnify the collecting Party from any sales or use taxes
      that may be subsequently levied on payments by the other Party by the
      collecting Party.

21. Emergency Restoration Procedures.

      In the event of an emergency, restoration procedures may be affected by
      the presence of Licensee's Facilities in GTE's conduit(s).  While GTE
      shall not be responsible for the repair of Licensee's Facilities that are
      damaged (except by mutual written agreement), GTE shall nonetheless
      control access to its Conduits if the restoration is to be achieved in an
      orderly fashion.

      21.1 Where GTE and Licensee are involved in emergency restorations, 
           access to GTE's conduit(s) will be controlled by GTE's Maintenance 
           District Manager or his/her on-site representative according to the 
           following guidelines:

            21.1.1 Service Disruptions/Outages

                  (a)  In the event of service disruptions and/or outages, 
                       while exercising its right to first access, GTE shall 
                       make all reasonable efforts to grant access to as many 
                       other entities with facilities in GTE's conduit(s) as 
                       is reasonably safe.

                  (b)  Where simultaneous access is not possible, access will 
                       be granted by GTE on a first come, first served basis.

            21.1.2 Service Affecting Emergencies

                  (a)  In the event of service affecting emergencies not 
                       resulting in service disruptions or outages, while 
                       exercising its right to first access, GTE shall make 
                       all reasonable efforts to grant access to as many other 
                       entities with facilities in GTE's conduit(s) as is 
                       reasonably safe.

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                  (b)  Where GTE is unable to grant simultaneous access to all
                       other entities with facilities in GTE's conduit(s),
                       access will granted according to the level of damage to
                       the facilities of each entity and the likelihood that a
                       given level of damage will result in service disruption.
                       Where the likelihood that a service disruption will
                       result is not clearly discernible, access will be on a
                       first come, first served basis.

      21.2 Without limiting any other indemnification or hold harmless
           provisions of this Agreement, Licensee agrees that any decision by
           GTE regarding access to Licensee's Facilities, or any action or
           failure to act by GTE under this Section 21 shall not constitute a
           basis for any claim by Licensee against GTE for any damage to
           Licensee's Facilities or disruption of Licensee's services, or any
           other direct or indirect damages of any kind whatsoever incurred by
           Licensee.

22. Damage Suspected to Licensee's Facilities Only.

      22.1 In the event Licensee receives information that Licensee's
           Facilities are damaged, Licensee shall notify GTE of said damage at
           [--TELEPHONE NUMBER--].  This is a 24-hour, 7 days per week
           notification number.  Licensee shall provide GTE all information
           known to it regarding the damage to Licensee's Facilities.

      22.2 In the event GTE receives notice that Licensee's Facilities
           are damaged, GTE will notify Licensee of said damage by telephone at
           the Licensee's emergency telephone number.  GTE shall provide
           Licensee all information known to it regarding the damage to
           Licensee's Facilities.

      22.3 After the giving of such notice by either Licensee or GTE,
           Licensee shall be authorized to perform emergency restoration
           maintenance activities in connection with Licensee's Facilities,
           subject to the provisions of this Agreement.

      22.4 Without limiting any other indemnification or hold harmless
           provisions of this Agreement, Licensee agrees that any decision by
           GTE regarding access to Licensee's facilities, or any action or
           failure to act by GTE, appropriately or inappropriately, under this
           Section shall not be the basis for any claim by Licensee against GTE
           for any damage to Licensee's Facilities or disruption of Licensee's
           services, or any other direct or indirect damages of any kind
           whatsoever incurred by Licensee and Licensee shall indemnify and
           hold GTE harmless from any such claim.

23. Access to GTE's Manholes/Handholes.

      23.1 GTE will allow Licensee to audit manholes/handholes that are
           included in any COR submitted to GTE to confirm usability.  Licensee
           shall give GTE at least fourteen (14) days advance written notice of
           its desire to audit and shall obtain all authorizations from
           appropriate authorities required to open the manholes/handholes.
           GTE shall have the right to have a GTE employee or agent present
           when its manholes/handholes are being opened.  Such GTE employee or
           agent shall have the authority to suspend Licensee's activities in
           and around GTE's manholes/handholes if, in the sole discretion of
           said employee or agent, any hazardous conditions arise or any unsafe
           practices are being followed by Licensee's employees, agents, or
           contractors.  Licensee agrees to reimburse GTE the cost of having
           GTE's employee or agent present.  Such charge shall be GTE's fully
           loaded labor rates then in effect.

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      23.2 For purposes other than to audit usability, GTE's manholes/handholes
           shall be opened only as permitted by GTE and only after Licensee has
           obtained all necessary authorizations from appropriate authorities to
           open manholes/handholes and conduct work operations therein.  GTE
           shall have the right to have a GTE employee or agent present at any
           site at which its manholes/handholes are being opened.  Such GTE
           employee or agent shall have the authority to suspend Licensee's work
           operations in and around GTE's manholes/handholes if, in the sole
           discretion of said employee or agent, any hazardous conditions arise
           or any unsafe practices are being followed by Licensee's employees,
           agents, or contractors. Licensee agrees to reimburse GTE the cost of
           having GTE's employee or agent present.  Such charge shall be GTE's
           fully loaded labor rates then in effect.  The presence of GTE's
           authorized employee or agent shall not relieve Licensee of its
           responsibility to conduct all of its work operations in and around
           GTE's conduit(s) in a safe and workmanlike manner, in accordance with
           the terms of this Agreement.

24. Abandonment.

      Nothing in this Agreement shall prevent or be construed to prevent GTE
      from abandoning, selling, assigning or otherwise disposing of any GTE
      conduit(s) or other GTE property used in connection with Licensee's
      Facilities; provided, however, that GTE shall condition any such sale,
      assignment or other disposition subject to the rights granted to Licensee
      pursuant to this Agreement.  GTE shall promptly notify Licensee of any
      proposed sale, assignment or other disposition of any GTE conduit(s) or
      other GTE property used in connection with Licensee's Facilities.

25. Notices.

      Any written notice to be given to a party to this Agreement shall be in
      writing and given or made by means of telegram, facsimile transmission,
      certified or registered mail, express mail or other overnight delivery
      service, or hand delivery, proper postage or other charges prepaid, and
      addressed or directed to the respective parties as follows:

            To   Licensee:      __________________________
                                __________________________
                                __________________________


            To   GTE:           __________________________
                                __________________________
                                __________________________



      Any notice given by personal delivery shall be deemed to have been given
      on the day of actual delivery and, if given by registered or certified
      mail, return receipt requested, on the date of receipt thereof and, if
      given by facsimile transmission, on the day of transmittal thereof if
      given during the normal business hours of the recipient and on the next
      business day if not given during normal business hours.

26. Non-Waiver of Terms and Conditions.

      No course of dealing, course of performance or failure to enforce any of
      term, right, condition or other provision of this Agreement shall
      constitute or be construed as a waiver of any term, right or condition or
      other provision of this Agreement.

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27. Dispute Resolution.

      27.1 Except in the case of (i) a suit, action or proceeding by GTE
           to compel Licensee to comply with its obligations to indemnify GTE
           pursuant to this Agreement or (ii) a suit, action or proceeding to
           compel either party to comply with the dispute resolution procedures
           set forth in this section, the parties agree to use the following
           procedure to resolve any dispute, controversy or claim arising out
           of or relating to this Agreement or its breach.

      27.2 At the written request of a party, each party shall designate
           a knowledgeable, responsible representative to meet and negotiate in
           good faith to resolve any dispute, controversy or claim arising
           under this Agreement.  The parties intend that these negotiations be
           conducted by non-lawyer, business representatives.  The substance of
           the negotiations shall be left to the discretion of the
           representatives.  Upon mutual agreement, the representatives may
           utilize other alternative dispute resolution procedures such as
           mediation to assist in the negotiations.  Discussions and
           correspondence between the representatives for purposes of these
           negotiations shall be treated as confidential, undertaken for
           purposes of settlement, shall be exempt from discovery and
           production, and shall not be admissible in the arbitration described
           below or in any subsequent lawsuit without the concurrence of all
           parties.  Documents identified in or provided during such
           negotiations, which are not prepared for purposes of the
           negotiations, shall not be so exempt and may, if otherwise
           admissible, be admitted as evidence in any subsequent proceeding.

      27.3 If a resolution of the dispute, controversy or claim is not
           reached within sixty (60) days of the initial written request, the
           dispute, controversy or claim shall be submitted to binding
           arbitration by a single arbitrator pursuant to the rules of the
           American Arbitration Association (AAA), except as hereinafter
           provided.  Discovery in any proceeding before the AAA shall be
           controlled by the arbitrator and shall be permitted to the extent
           set forth in this section.  Parties may exchange, in any
           combination, up to thirty-five (35) (none of which may contain
           subparts) written interrogatories, demands to produce documents and
           requests for admission.  Each party may also to take the oral
           deposition of one (1) witness.  Additional discovery may be
           permitted upon mutual agreement of the parties.  The arbitration
           hearing shall be commenced within sixty (60) days of the demand for
           arbitration and shall be held in the city where GTE's local offices
           are located.  The arbitrator shall rule on the dispute, controversy
           or claim by issuing a written opinion within thirty (30) days after
           the close of hearings.  The times specified in this section may be
           extended upon mutual agreement of the parties or by the arbitrator
           upon a showing of good cause.  Judgment upon the award rendered by
           the arbitrator may be entered in any court having jurisdiction.

      27.4 Each party shall bear its own costs, including attorneys'
           fees, incurred in connection with any of the foregoing procedures.
           A party seeking discovery shall reimburse the responding party the
           cost of reproducing documents (to include search time and
           reproduction time costs).  The fees associated with any arbitration,
           including the fees of the arbitrator, shall be divided equally
           between the parties.

28. Compliance With Laws.

      Notwithstanding anything to the contrary in this Agreement, Licensee
      shall ensure that any and all activities it undertakes pursuant to this
      Agreement shall comply with all applicable laws, including, without
      limitation, all applicable provisions of (I) workers' compensation laws,
      (ii) unemployment compensation laws, (iii) the Federal Social Security
      Law, (iv) the Fair Labor Standards Act, and (v) all laws, regulations,
      rules, guidelines, policies, orders, permits and

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      approvals of any governmental authority relating to environmental matters
      and/or occupational safety.

29. Force Majeure.

      Except for payment of the Occupancy Fees and other amounts payable under
      this Agreement, neither party shall have any liability for its delays or
      its failure in performance due to fire, flood, explosion, pest damage,
      power failures, strikes or labor disputes, acts of God, the Elements,
      war, civil disturbances, acts of civil or military authorities or the
      public enemy, inability to secure raw materials, transportation
      facilities, fuel or energy shortages, or other cause beyond its control.

30. Assignment.

      30.1 The rights and obligations of Licensee under this Agreement
           shall not be assigned, transferred or sub-licensed, in whole or in
           part, without the prior written consent of GTE.  An assignment,
           transfer or sub-license of this Agreement by Licensee shall not
           relieve Licensee of its obligations under this Agreement.  Any
           assignment attempted without the prior written consent of GTE shall
           be void.

      30.2 GTE shall have the right to assign this Agreement and to
           assign its rights and delegate its obligations and liabilities under
           this Agreement, either in whole or in part.  GTE shall provide
           notice to Licensee of any assignment which shall state the effective
           date thereof.  Upon the effective date and to the extent of the
           assignment, GTE shall be released and discharged from all
           obligations and liabilities under this Agreement.

      30.3 Neither this Agreement nor any term or provision hereof, nor
           any inclusion by reference shall be construed as being for the
           benefit of any person or entity not a signatory hereto.

      30.4 This Agreement shall be binding upon and inure to the benefit
           of the parties hereto and their respective successors and assigns.

31. Applicable Law.

      This Agreement, and the rights and obligations contained in it, shall be
      governed and construed under the laws of the State of ________________
      without regard to its conflicts of laws provisions.

32. Subsequent Law.

      The terms and conditions of this Agreement shall be subject to any and
      all applicable laws, rules, regulations or guidelines that subsequently
      may be prescribed by any federal, state or local governmental authority.
      To the extent required by any such subsequently prescribed law, rule,
      regulation or guideline, the parties agree to modify, in writing, the
      affected term(s) and condition(s) of this Agreement to bring them into
      compliance with such law, rule, regulation or guideline.  Should any term
      of this Agreement be determined by a court or other entity with competent
      jurisdiction to be unenforceable, all other terms of this Agreement shall
      remain in full force and effect.

33. Headings.

      All headings contained in this Agreement are for convenience only and are
      not intended to affect the meaning or interpretation of any part of this
      Agreement.

                                      L-14
<PAGE>   188




34. Entire Agreement.

      The terms and conditions of this Agreement supersede all prior oral or
      written understandings between the parties and constitute the entire
      agreement between them concerning the subject matter of this Agreement.
      There are no understandings or representations, express or implied, not
      expressly set forth in this Agreement.  This Agreement shall not be
      modified or amended except by a writing signed by the party to be
      charged.

IN WITNESS WHEREOF, the parties hereto have executed this Agreement through
their authorized representatives.

<TABLE>
<S>                                 <C>
For GTE:                            For Licensee:

GTE



- ----------------------------------  -------------------------
(Signature of Authorized Agent)     (Signature of Officer)
(Printed Name of Authorized Agent)  (Printed Name of Officer)
(Title)                             (Title)
(Date)                              (Date)


                                    ATTEST:



                                    Corporate Seal (If Applicable)
</TABLE>

                                      L-15
<PAGE>   189




                                 EXHIBIT _____


                                 OCCUPANCY FEES




                                      L-16
<PAGE>   190




                                   APPENDIX M

                  RECIPROCAL COMPENSATION FOR CALL TERMINATION

1.   This document describes the reciprocal compensation arrangements between
     DTI and GTE for Local Tariff, Toll and Switched Access Services.  The
     Parties shall compensate each other for transport and termination of such
     traffic at the rates provided in Appendix D and/or the appropriate
     Parties' Switched Access Tariff.

2.   Compensation for Call Termination

      A.   Reciprocal compensation does not apply in a resale
           environment.

      B.   The following compensation terms shall apply in all cases
           where DTI purchases GTE's unbundled Local Switching:

            1.   For local intra-switch calls between lines
                 connected to GTE's switch where DTI has purchased GTE's
                 unbundled Local Switching, the Parties agree to impose no call
                 termination charges on each other.  GTE's Local Switching
                 charge will apply as described below where the call is:

                  (a)  Originated by DTI's customer and completed to a GTE
                       customer:

                        (1)  (For use of the local switch):  Local Switching
                             charge at the originating office will apply to DTI.

                  (b)  Originated by DTI's customer and completed to the
                       customer of a Third Party LEC (not affiliated with DTI)
                       using GTE's unbundled Local Switching:

                        (1)  (For use of the local switch):  Local Switching
                              charge at the originating office will apply to
                              DTI.

                  (c)  Originated by DTI's customer and completed to another
                       DTI's customer using GTE's unbundled Local Switching.

                        (1)  (For use of the local switch):  Local Switching
                              charge at the originating office will apply to
                              DTI.

                  (d)  Originated by a GTE customer and terminated to DTI's
                       customer using GTE's unbundled Local Switching.

                        (1)  No Local Switching charge will apply.

                  (e)  Originated by the customer of a Third Party LEC (not
                       affiliated with DTI) using GTE's unbundled Local
                       Switching and terminated to DTI's customers using
                       GTE's unbundled Local Switching.

                        (1)  No Local Switching charge will apply to DTI.

      2.   For Local inter-switch calls where DTI has purchased GTE's
           unbundled Local Switching.

            GTEs charges will apply to DTI described below where the call is:

                                      M-1
<PAGE>   191




                 (a)  Originated from DTI's end-user customer using GTE's
                      unbundled Local Switching and completed to a GTE
                      customer.

                       (1)  (For use of the local switch):  Local Switching
                            charge at the originating office.

                       (2)  a mileage-based transport charge will apply when DTI
                            uses GTE's transport.

                       (3)  (For call termination): Charges for local
                            interconnection/call termination, when applicable.

                 (b)  Originated from DTI's customer using GTE's unbundled Local
                      Switching and completed to a Third Party LEC (not
                      affiliated with DTI) customer using GTE's unbundled Local
                      Switching.

                       (1)  (For use of the local switch):  Local Switching
                            charge at the originating Office.

                       (2)  a mileage-based transport charge will apply when DTI
                            uses GTE's transport.

                 (c)  Originated from DTI's customer using GTE's unbundled Local
                      Switching and completed to the interconnected network of
                      a Third Party LEC (not affiliated with DTI).

                       (1)  (For use of the local switch):  Local Switching
                            charge at the originating office.

                       (2)  a mileage-based transport charge will apply when DTI
                            uses GTE's transport, and mileage shall be measured
                            between the originating office and the POI of the
                            Third Party's network.

                 (d)  Originated from DTI's customer using GTE's unbundled Local
                      Switching and completed to DTI's customer using GTE's
                      unbundled Local Switching.

                       (1)  (For use of the local switch):  Local Switching
                            charge at the originating office.

                       (2)  a mileage-based transport charge will apply when DTI
                            uses GTE's transport.

                       (3)  (For use of the local switch):  Local Switching
                            charge at the terminating office.

                 (d)  Originated by a GTE customer and terminated to DTI's
                      customer using GTE's unbundled Local Switching.

                       (1)  (For use at local switch):  Local Switching Charge
                            at the terminating office.

                                      M-2
<PAGE>   192




                       (2)  (For call termination): DTI shall charge GTE for
                            local interconnection/call termination, when
                            applicable.

                 (f)  Originated by a customer of a third-party LEC (not
                      affiliated with DTI) using GTE's unbundled Local
                      Switching and terminated to DTI's customer using GTE's
                      unbundled Local Switching.

                       (1)  (For use of the local switch):  Local Switching
                            charge at the terminating office.

                 (g)  Originated by a customer of the interconnected network of
                      a third-party LEC (not affiliated with DTI) and
                      terminated to DTI's customer using GTE's unbundled Local
                      Switching.

                       (1)  (For use of the local switch):  Local Switching
                            charge at the terminating office.

3.   For intraLATA toll calls where DTI has purchased GTE's unbundled Local
     Switching, charges per Unbundled Network Element pricing shall apply as
     follows:

      a.   Originated by DTI's customer and completed to a GTE customer.

            1.   (For use of the local switch):  Local Switching
                 charge plus RIC and CCLC (Residual Interconnection Charge) at
                 the originating office.

            2.   Shared transport charge between the two offices
                 will apply when DTI uses GTE's transport.

            3.   (For call termination):  End Office Switching
                 charge at the terminating office (Switched Access Rate).

            4.   RIC and CCLC at the terminating office.

      B.   Originated by DTI's customer and completed to the customer of
           a third-party LEC (not affiliated with DTI) using GTE's unbundled
           Local Switching in a distant end office.

            1.   (For use of the local switch):  Local Switching
                 charge plus RIC and CCLC at the originating office.

            2.   Shared transport charge between the two offices
                 will apply when DTI uses GTE's transport.

      C.   Originated by DTI customer and completed to the network of a
           third-party LEC (not affiliated with DTI) interconnected with GTE's
           network.

            1.   (For use of the local switch):  Local Switching
                 charge, plus RIC and CCLC, at the originating office.

            2.   Common transport charge will apply when DTI uses
                 GTE's transport, and mileage shall be measured between the
                 originating office and the POI of the Third Party's network.

            3.   Tandem Switching, where applicable.

                                      M-3
<PAGE>   193




      D.   Originated by DTI's customer and completed by another of
           DTI's customers being served through GTE's unbundled Local Switching
           in a distant office.

            1.   (For use of the local switch):  Local Switching
                 charge plus RIC and CCLC at the originating office.

            2.   Shared transport charge between the two offices
                 will apply when DTI uses GTE's transport.

            3.   (For use of the local switch):  Local Switching
                 charge plus RIC and CCLC at the terminating office.

      E.   Originated by a GTE customer and terminated to DTI's customer
           using GTE's unbundled Local Switching.

            1.   (For use of the local switch):  Local Switching
                 charge plus RIC and CCLC at the terminating office.

            2.   (For call termination):  DTI will charge GTE
                 Local Switching at the terminating office (Switched Access
                 Rate).

            3.   (For call termination):  DTI will charge GTE NIC
                 and CCLC at the terminating office.

      F.   Originated by the customer of a third-party LEC (not
           affiliated with DTI) using GTE's unbundled Local Switching in a
           distant end office and terminated to DTI's customer using GTE's
           unbundled Local Switching.

            1.   (For use of the local switch):  Local Switching
                 charge plus RIC and CCLC at the terminating office.

      G.   Originated by a customer of the network of a third-party LEC
           (not affiliated with DTI) interconnected with GTE's network and
           terminated to DTI's customer using GTE's unbundled Local Switching.

            1.   (For use of the local switch):  Local Switching
                 charge plus RIC and CCLC at the terminating office.

4.   For intrastate Switched Access calls where DTI's is using GTE's unbundled
     Local Switching for calls originated from or terminated to an IXC for
     completion:

      a.   For calls originated from DTI's customer to DTI's own IXC
           switch (or that of an affiliate) for completion.

            1.   (For use of the local switch):  Local Switching
                 charge at the terminating office.

            2.   Originating RIC and CCLC.

            3.   GTE will charge DTI's IXC affiliate the following
                 Switched Access elements on a meet-point basis:

                  (a)  Local Transport;

                  (b)  Tandem Switching.

                                      M-4
<PAGE>   194




            4.   DTI will charge DTI's IXC affiliate the following
                 Switched Access elements on a meet-point basis:

                  (a)  Originating RIC and CCLC;

                  (b)  Local Switching.

      B.   For calls originating from DTI's customer to an IXC's switch
           not affiliated with DTI.

            1.   (For use of the local switch):  DTI's customer to
                 an IXC's switch not affiliated with DTI.

            2.   Originating RIC and CCLC.

            3.   GTE shall charge the non-affiliated IXC for the
                 following originating Switched Access on a meet-point basis:

                  (a)  Local Transport;

                  (b)  Tandem Switching.

            4.   DTI will charge the non-affiliated IXC for the
                 following Switched Access elements on a meet-point basis:

                  (a)  Originating RIC and CCLC;

                  (b)  Local Switching.

      C.   For calls terminating to DTI's end-user customer from DTI's
           own IXC switch (or that of an affiliate) for completion.

            1.   (For use of the local switch):  Local Switching
                 charge at the terminating office.

            2.   Terminating RIC and CCLC.

            3.   GTE will charge DTI's IXC (affiliate) the
                 following Switched Access elements on a meet-point basis:

                  (a)  Local Transport;

                  (b)  Tandem Switching.

            4.   DTI will charge DTI's IXC (affiliate) for the
                 following Switched Access elements on a meet-point basis:

                  (a)  Terminating RIC and CCLC.

                  (b)  Local Switching.

      D.   For calls terminating to DTI's customer from an IXC switch
           not affiliated with DTI.

            1.   (For use of the local switch):  Local Switching
                 charge at the terminating office.

                                      M-5
<PAGE>   195




            2.   Terminating RIC and CCLC.

            3.   GTE shall charge the IXC for the following
                 terminating Switched Access on a meet point basis:

                  (a)  Local Transport;

                  (b)  Tandem Switching.

            4.   DTI will charge IXC for the following Switched
                 Access elements on a meet-point basis:

                  (a)  Terminating RIC and CCLC;

                  (b)  Local Switching.

5.   For interstate Switched Access calls where DTI is using GTE's unbundled
     Local Switching for calls originated from or terminated to an IXC for
     completion:

      a.   For calls originated from DTI's customer to DTI's own IXC
           switch (or that of an affiliate) for completion.

            1.   (For use of the local switch):  Local Switching
                 charge at the originating office.

            2.   Originating Residual Interconnection Charge (RIC)
                 and CCL.

            3.   GTE shall charge DTI's IXC affiliate for the
                 following originating Switched Access on a meet-point basis:

                  (a)  Local Transport;

                  (b)  Tandem Switching.

            4.   DTI will charge DTI's IXC affiliate the following
                 Switched Access elements on a meet-point basis:

                  (a)  Originating RIC;

                  (b)  Originating CCLC;

                  (C)  Local Switching.

      B.   For calls originated from DTI's customer to an IXC's switch
           not affiliated to DTI.

            1.   (For use of the local switch):  Local Switching
                 charge at the terminating office.

            2.   Originating RIC and CCLC.

            3.   GTE shall charge the IXC for the following
                 originating Switched Access on a meet-point basis:

                  (a)  Local Transport;

                                      M-6
<PAGE>   196




                  (b)  Tandem Switching.

            4.   DTI will charge IXC the following Switched Access
                 elements on a meet-point basis:

                  (a)  Originating RIC;

                  (b)  Originating CCLC;

                  (c)  Local Switching.

      C.   For calls terminating to DTI's customer for DTI's own IXC switch (or
           that of an affiliate) for completion.

            1.   (For use of the local switch):  Local Switching
                 charge at the terminating office.

            2.   Terminating RIC and CCL.

            3.   GTE will charge DTI's IXC (affiliate) the
                 following Switched Access elements on a meet-point basis:

                  (a)  Local Transport;

                  (b)  Tandem Switching.

            4.   DTI will charge DTI's IXC affiliate the following
                 Switched Access elements on a meet-point basis:

                  (a)  Terminating RIC;

                  (b)  Terminating CCLC;

                  (c)  Local Switching.

      D.   For calls terminating to DTI's customer from an IXC switch
           not affiliated with DTI.

            1.   (For use of the local switch):  Local Switching
                 charge at the terminating office.

            2.   Terminating RIC and CCL.

            3.   GTE will charge the non-affiliated IXC for the
                 following terminating Switched Access on a meet-point basis:

                  (a)  Local Transport;

                  (b)  Tandem Switching.

            4.   DTI will charge IXC the following Switched Access
                 elements on a meet-point basis:

                  (a)  Terminating RIC;

                  (b)  Terminating CCLC;

                  (c)  Local Switching.

                                      M-7
<PAGE>   197




                                  APPENDIX 46A


                                   GTE TERMS


Pursuant to Section 46 of Article III of the GTE/Digital Teleport, Inc.
Interconnection Agreement, and subject to all the terms and conditions of that
Section, each of the following rates or terms may be replaced or supplemented
by the correlative rate or term set forth in the Arbitrating CLEC Terms listed
in Appendix 46, as and when provided in Section 46 and only until, as long as,
and under the conditions prescribed by Section 46.

1.   Substitute the Avoided Cost Discount in Appendix F with the resale
     discount rates(s) that may be indicated in Appendix 46B.

2.   Substitute the list of services excluded from resale under Section 2.2 of
     Article VI to remove those services to be made available for resale that
     may be indicated in Appendix 46B.

3.   Substitute the list of services available for resale but not at a
     discount under Section 2.3 if Article VI to remove those services to be
     made available for resale at a discount that may be indicated in Appendix
     46B.

4.   Substitute the rates for transport and termination of traffic in Appendix
     D with the rates that may be indicated in Appendix 46B.

5.   Substitute the prices for unbundled elements in Appendix G with prices
     that may be indicated in Appendix 46B.

                                      N-1
<PAGE>   198


                                  APPENDIX 46B


                             ARBITRATING CLEC TERMS


Pursuant to Section 46 of Article III of the GTE/Digital Teleport, Inc.
Interconnection Agreement, and subject to all of the terms and conditions
thereof, and after notice as called for in Section 46, the following terms as
written in the "Arbitrating CLEC" Agreement referred to in Section 46 will be
substituted for the GTE Terms which are set out in Appendix 46A as and when
Section 46 calls for them to be substituted.

When the identity of the Arbitrating CLEC Agreement is established pursuant to
the provisions of Section 46, the parties shall modify this Appendix by
replacing the descriptions of subjects below with the specific rates and terms
of the Arbitrating CLEC Agreement that describes those precise points.

1.   The resale discount percentages(s) ordered by the arbitrator to apply to
     the services that will be provided under Article VI of this Agreement for
     resale at a discount.

2.   The services that were ordered by the arbitrator to be made available for
     resale which would otherwise be excluded from available resale services
     under Article VI, Section 2.2 of this Agreement.

3.   The services that were ordered by the arbitrator to be made available for
     resale at a discount which would otherwise be made available but not at a
     discount under Article VI, Section 2.3 of this Agreement.

4.   The rates for transport and termination of traffic ordered by the
     arbitrator to apply to the services that will be provided under Article V
     of this agreement.

5.   The rates for unbundled elements ordered by the arbitrator to apply to
     the services that will be provided under Article VII of this Agreement.

                                      O-1

<PAGE>   1

                                                                   EXHIBIT 10.24



               INTERCONNECTION, RESALE AND UNBUNDLING AGREEMENT

                                   BETWEEN


                          GTE SOUTHWEST INCORPORATED
                           GTE MIDWEST INCORPORATED
                          GTE ARKANSAS INCORPORATED



                                     AND



                            DIGITAL TELEPORT, INC.

<PAGE>   2



                                TABLE OF CONTENTS

<TABLE>
<S>                                                                                                           <C>
ARTICLE I
         SCOPE AND INTENT OF AGREEMENT..........................................................................I-1

ARTICLE II
         DEFINITIONS...........................................................................................II-1

1.       General Definitions...................................................................................II-1
                  1.1      "ACCESS SERVICE REQUEST"............................................................II-1
                  1.2      "ACT"...............................................................................II-1
                  1.3      "AFFILIATE".........................................................................II-1
                  1.4      "AMA"...............................................................................II-1
                  1.5      "APPLICABLE LAW"....................................................................II-1
                  1.6      "AUTOMATIC LOCATION IDENTIFICATION/DATA MANAGEMENT SYSTEM (ALI/DMS)"
                           ....................................................................................II-1
                  1.7      "AUTOMATIC NUMBER IDENTIFICATION" OR "ANI"..........................................II-1
                  1.8      "BELLCORE"..........................................................................II-1
                  1.9      "BILL-AND-KEEP ARRANGEMENT".........................................................II-1
                  1.10     "BONA FIDE REQUEST (BFR)"...........................................................II-2
                  1.11     "BUSINESS DAY"......................................................................II-2
                  1.12     "CENTRAL OFFICE SWITCH".............................................................II-2
                  1.13     "CENTRALIZED MESSAGE DISTRIBUTION SYSTEM" (CMDS)....................................II-2
                  1.14     "CLLI CODES"........................................................................II-2
                  1.15     "COMMERCIAL MOBILE RADIO SERVICES" (CMRS)...........................................II-2
                  1.16     "COMMISSION"........................................................................II-2
                  1.17     "COMMON CHANNEL SIGNALING" OR "CCS".................................................II-2
                  1.18     "COMPETITIVE LOCAL EXCHANGE CARRIER" (CLEC).........................................II-2
                  1.19     "COMPLIANCE"........................................................................II-2
                  1.20     "CUSTOMER"..........................................................................II-2
                  1.21     "CUSTOMER USAGE DATA"...............................................................II-2
                  1.22     "DS-1"..............................................................................II-2
                  1.23     "DS-3"..............................................................................II-3
                  1.24     "ELECTRONIC FILE TRANSFER"..........................................................II-3
                  1.25     "EMR"...............................................................................II-3
                  1.26     "E-911 SERVICE".....................................................................II-3
                  1.27     "EXCHANGE SERVICE"..................................................................II-3
                  1.28     "EIS" OR "EXPANDED INTERCONNECTION SERVICE".........................................II-3
                  1.29     "FACILITY"..........................................................................II-3
                  1.30     "FCC"...............................................................................II-3
                  1.31     "GENERATOR".........................................................................II-3
                  1.32     "GTOC"..............................................................................II-3
                  1.33     "GUIDE".............................................................................II-3
                  1.34     "HAZARDOUS CHEMICAL"................................................................II-3
                  1.35     "HAZARDOUS WASTE"...................................................................II-4
                  1.36     "IMMINENT DANGER"...................................................................II-4
                  1.37     "INCUMBENT LOCAL EXCHANGE CARRIER" (ILEC)...........................................II-4
                  1.38     "INTERIM NUMBER PORTABILITY (INP)"..................................................II-4
                  1.39     "INTERCONNECTION POINT" ("IP")......................................................II-4
                  1.40     "ISDN USER PART (ISUP)".............................................................II-4
                  1.41     "IXC" OR "LNTEREXCHANGE CARRIER"....................................................II-4
                  1.42     "INTERNETWORK FACILITIES" OR  "INTERCONNECTION FACILITY"............................II-4
                  1.43     "LATA"..............................................................................II-4
                  1.44     "LINE INFORMATION DATA BASE (LIDB)".................................................II-4
</TABLE>

                                      -i-


<PAGE>   3


<TABLE>
<S>                                                                                                           <C>
                  1.45     "LINE SIDE".........................................................................II-4
                  1.46     "LOCAL EXCHANGE CARRIER" OR "LEC"...................................................II-4
                  1.47     "LOCAL EXCHANGE ROUTING GUIDE" OR "LERG"............................................II-5
                  1.48     "LOCAL NUMBER PORTABILITY (LNP)"....................................................II-5
                  1.49     "LOCAL TRAFFIC".....................................................................II-5
                  1.50     "MDF" OR "MAIN DISTRIBUTION FRAME"..................................................II-5
                  1.51     "MEET-POINT BILLING" OR "MPB".......................................................II-5
                  1.52     "MECAB".............................................................................II-5
                  1.53     "MECOD".............................................................................II-5
                  1.54     "MID-SPAN FIBER MEET"...............................................................II-5
                  1.55     "NANP"..............................................................................II-5
                  1.56     "NETWORK ELEMENT"...................................................................II-5
                  1.57     "NID" OR "NETWORK INTERFACE DEVICE".................................................II-6
                  1.58     "NUMBERING PLAN AREA" OR "NPA"......................................................II-6
                  1.59     "NXX", "NXX CODE", "CENTRAL OFFICE CODE" OR "CO CODE"...............................II-6
                  1.60     "911 SERVICE".......................................................................II-6
                  1.61     "OWNER AND OPERATOR"................................................................II-6
                  1.62     "POI"...............................................................................II-6
                  1.63     "POLE ATTACHMENT"...................................................................II-6
                  1.64     "PROVIDER"..........................................................................II-6
                  1.65     "PUBLIC SAFETY ANSWERING POINT" OR "PSAP"...........................................II-6
                  1.66     "RATE CENTER".......................................................................II-6
                  1.67     "RIGHT-OF-WAY" OR "ROW".............................................................II-7
                  1.68     "ROUTING POINT".....................................................................II-7
                  1.69     "SERVICE CONTROL POINT" OR "SCP"....................................................II-7
                  1.70     "SERVICE SWITCHING POINT" OR "SSP"..................................................II-7
                  1.71     "SIGNALING POINT" OR "SP"...........................................................II-7
                  1.72     "SIGNALING SYSTEM 7" OR "SS7".......................................................II-7
                  1.73     "SIGNAL TRANSFER POINT" OR "STP"....................................................II-7
                  1.74     "SUBSIDIARY"........................................................................II-7
                  1.75     "SYNCHRONOUS OPTICAL NETWORK" OR "SONET"............................................II-7
                  1.76     "SWITCHED ACCESS SERVICE"...........................................................II-7
                  1.77     "TELECOMMUNICATIONS SERVICES".......................................................II-7
                  1.78     "THIRD PARTY CONTAMINATION".........................................................II-8
                  1.79     "TRUNK SIDE"........................................................................II-8
                  1.80     "UNDEFINED TERMS"...................................................................II-8
                  1.81     "VERTICAL FEATURES" (INCLUDING "CLASS FEATURES")....................................II-8
                  1.82     "WIRE CENTER".......................................................................II-8

ARTICLE III
         GENERAL PROVISIONS...................................................................................III-1

1.       Scope of General Provisions..........................................................................III-1

2.       Term and Termination.................................................................................III-1
                  2.1      Term...............................................................................III-1
                  2.2      Post-Termination Arrangements......................................................III-1
                  2.3      Termination Upon Default...........................................................III-1
                  2.4      Termination Upon Sale..............................................................III-1
                  2.5      Liability upon Termination.........................................................III-1

3.       Amendments...........................................................................................III-2

4.       Assignment...........................................................................................III-2
</TABLE>


                                      -ii-

<PAGE>   4


<TABLE>
<S>     <C>                                                                                                  <C>
5.       Authority............................................................................................III-2

6.       Responsibility for Payment...........................................................................III-2

7.       Billing and Payment..................................................................................III-2
                  7.1      Dispute............................................................................III-2
                  7.2      Late Payment Charge................................................................III-2
                  7.3      Due Date...........................................................................III-2
                  7.4      Audits.............................................................................III-2

8.       Binding Effect.......................................................................................III-2

9.       Capacity Planning and Forecasting....................................................................III-3

10.      Compliance with Laws and Regulations.................................................................III-3

11.      Confidential Information.............................................................................III-3
                  11.1     Identification.....................................................................III-3
                  11.2     Handling...........................................................................III-3
                  11.3     Exceptions.........................................................................III-4
                  11.4     Survival...........................................................................III-4

12.      Consent..............................................................................................III-4

13.      Cooperation on Fraud Minimization....................................................................III-4

14.      Dispute Resolution...................................................................................III-4
                  14.1     Alternative to Litigation..........................................................III-4
                  14.2     Negotiations.......................................................................III-4
                  14.3     Arbitration........................................................................III-5
                  14.4     Expedited Arbitration Procedures...................................................III-5
                  14.5     Costs..............................................................................III-5
                  14.6     Continuous Service.................................................................III-5

15.      Entire Agreement.....................................................................................III-5

16.      Expenses.............................................................................................III-6

17.      Force Majeure........................................................................................III-6

18.      Good Faith Performance...............................................................................III-6

19.      Governing Law........................................................................................III-6

20.      Standard Practices...................................................................................III-6

21.      Headings.............................................................................................III-6

22.      Independent Contractor Relationship..................................................................III-6

23.      Law Enforcement Interface............................................................................III-6

24.      Liability and Indemnity..............................................................................III-7
                  24.1     Indemnification....................................................................III-7
                  24.2     End User and Content-Related Claims................................................III-7
</TABLE>

                                     -iii-


<PAGE>   5


<TABLE>
<S>      <C>                                                                                                 <C>
                  24.3     DISCLAIMER.........................................................................III-7
                  24.4     Limitation of Liability............................................................III-8
                  24.5     Intellectual Property..............................................................III-8

25.      Multiple Counterparts................................................................................III-8

26.      No Offer.............................................................................................III-8

27.      No Third Party Beneficiaries.........................................................................III-8

28.      Notices..............................................................................................III-8

29.      Protection...........................................................................................III-9
                  29.1     Impairment of Service..............................................................III-9
                  29.2     Resolution.........................................................................III-9

30.      Publicity............................................................................................III-9

31.      Regulatory Agency Control............................................................................III-9

32.      Changes in Legal Requirements........................................................................III-9

33.      Effective Date.......................................................................................III-9

34.      Regulatory Matters..................................................................................III-10

35.      Rule of Construction................................................................................III-10

36.      Section References..................................................................................III-10

37.      Service Standards...................................................................................III-10
                  37.1     ..................................................................................III-10
                  37.2     ..................................................................................III-10
                  37.3     ..................................................................................III-10
38.      Severability........................................................................................III-10

39.      Subcontractors......................................................................................III-10

40.      Subsequent Law......................................................................................III-10

41.      Taxes...............................................................................................III-10

42.      Trademarks and Trade Names..........................................................................III-11

43.      Waiver..............................................................................................III-11

44.      Environmental Responsibility........................................................................III-11

45.      TBD Prices..........................................................................................III-12

46.      Amendment of Certain Rates, Terms and Conditions....................................................III-13
</TABLE>

                                      -iv-


<PAGE>   6


<TABLE>
<S>      <C>                                                                                                  <C>
ARTICLE IV
         GENERAL RULES GOVERNING RESOLD SERVICES
         AND UNBUNDLED ELEMENTS ...............................................................................IV-1

1.       General...............................................................................................IV-1

2.       Liability of GTE......................................................................................IV-1
                  2.1      Inapplicability of Tariff Liability.................................................IV-1
                  2.2      DTI Tariffs or Contracts............................................................IV-1
                  2.3      No Liability for Errors.............................................................IV-1

3.       Unauthorized Changes..................................................................................IV-1
                  3.1      Procedures..........................................................................IV-1
                  3.2      Option to Restrict Changes Without Evidence of Authorization........................IV-2

4.       Impact of Payment of Charges on Service...............................................................IV-2

5.       Unlawful Use of Service...............................................................................IV-2

6.       Timing of Messages....................................................................................IV-3

7.       Procedures For Preordering, Ordering, Provisioning, Etc...............................................IV-3

8.       Customer Contacts.....................................................................................IV-3

ARTICLE V
         INTERCONNECTION AND TRANSPORT AND TERMINATION OF TRAFFIC...............................................V-1

1.       Services Covered by This Article.......................................................................V-1
                  1.1      Types of Services....................................................................V-1
                  1.2      Service Locations for Interconnection Services and Facilities........................V-1
                  1.3      Additional Services or Service Locations.............................................V-1

2.       Billing and Rates......................................................................................V-1
                  2.1      Rates and Charges....................................................................V-1
                  2.2      Billing..............................................................................V-1

3.       Transport and Termination of Traffic...................................................................V-1
                  3.1      Traffic to be Exchanged..............................................................V-1
                  3.2      Compensation For Exchange Of Traffic.................................................V-2
                  3.3      Tandem Switching Traffic.............................................................V-3
                  3.4      Inter-Tandem Switching...............................................................V-3

4.       Direct Network Interconnection.........................................................................V-3
                  4.1      Network Interconnection Architecture.................................................V-3
                  4.2      Compensation.........................................................................V-4
                  4.3      Trunking Requirements................................................................V-4
                  4.4      Network Redesigns Initiated by GTE...................................................V-6
                  4.5      Interconnection Calling and Called Scopes for the Access Tandem
                           Interconnection and the End Office Interconnection...................................V-6

5.       Indirect Network Interconnection.......................................................................V-6

6.       Number Resources.......................................................................................V-6
                  6.1      Number Assignment....................................................................V-6
</TABLE>

                                      -v-


<PAGE>   7


<TABLE>

<S>      <C>                                                                                                   <C>
                  6.2      Rate Centers.........................................................................V-6
                  6.3      Routing Points.......................................................................V-6
                  6.4      Code and Numbers Administration......................................................V-6
         6.5      Programming Switches..........................................................................V-7

7.       Interim Number Portability (INP).......................................................................V-7

8.       Meet-Point Billing.....................................................................................V-7
         8.1      Meet-Point Arrangements.......................................................................V-7
         8.2      Compensation..................................................................................V-8

9.       Common Channel Signaling...............................................................................V-8
         9.1      Service Description...........................................................................V-8
         9.2      Signaling Parameters..........................................................................V-8
         9.3      Privacy Indicators............................................................................V-8
         9.4      Connection Through STP........................................................................V-8
         9.5      Third Party Signaling Providers...............................................................V-8
         9.6      Multi-Frequency Signaling.....................................................................V-8

10.      Service Quality and Performance........................................................................V-9

11.      Network Outages........................................................................................V-9

ARTICLE VI
         RESALE OF SERVICES....................................................................................VI-1

1.       General...............................................................................................VI-1

2.       Terms and Conditions..................................................................................VI-1
         2.1      Quality and Performance......................................................................VI-1
         2.2      Restrictions on Resale.......................................................................VI-1
         2.3      Restrictions on Discount of Retail Services..................................................VI-1
         2.4      Resale to Other Carriers.....................................................................VI-2

3.       Ordering and Billing..................................................................................VI-2
         3.1      Local Service Request........................................................................VI-2
         3.2      Certificate of Operating Authority...........................................................VI-2
         3.3      Letter of Authorization......................................................................VI-2
         3.4      Directory Assistance Listings................................................................VI-2
         3.5      Nonrecurring Charges.........................................................................VI-2
         3.6      Transfers Between DTI and Another Reseller of GTE Services...................................VI-2
         3.7      Local Calling Detail.........................................................................VI-2
         3.8      Procedures...................................................................................VI-2
         3.9      LIDB.........................................................................................VI-2
         3.10     "OLN"........................................................................................VI-2

4.       Maintenance...........................................................................................VI-3
         4.1      Maintenance, Testing and Repair..............................................................VI-3
         4.2      Specifics and Procedures for Maintenance.....................................................VI-3
         5.1      Description of Local Exchange Services Available for Resale..................................VI-3
         5.2      List of Services Available for Resale........................................................VI-3
         5.3      Rates........................................................................................VI-3
         5.4      Grandfathered Services.......................................................................VI-4
         5.5      Access.......................................................................................VI-4
         5.6      Operator Services (OS) and Directory Assistance (DA).........................................VI-4
</TABLE>


                                      -vi-


<PAGE>   8


<TABLE>
<S>                                                                                                          <C>          
ARTICLE VII
         UNBUNDLED NETWORK ELEMENTS...........................................................................VII-1

1.       General..............................................................................................VII-1

2.       Unbundled Network Elements...........................................................................VII-1
         2.1      Categories..................................................................................VII-1
         2.2      Prices......................................................................................VII-1
         2.3      Interconnection to Unbundled Elements.......................................................VII-1
         2.4      Service Quality.............................................................................VII-2

3.       Network Interface Device.............................................................................VII-2
         3.1      Direct Connection...........................................................................VII-2
         3.2      NID to NID Connection.......................................................................VII-2
         3.3      Removal of Cable Pairs......................................................................VII-2
         3.4      Maintenance.................................................................................VII-3

4.       Loop Elements........................................................................................VII-3
         4.1      Service Description.........................................................................VII-3
         4.2      Categories of Loops.........................................................................VII-3
         4.3      Conditioned Loops...........................................................................VII-3
         4.4      Features, Functions, Attributes.............................................................VII-4
         4.5      Digital Loop Carrier........................................................................VII-4
         4.6      Unbundled Loop Facility Certification.......................................................VII-4
         4.7      Unbundled Loop Facility Notification........................................................VII-5
         4.8      Subloops....................................................................................VII-5

5.       Port and Local Switching Elements....................................................................VII-5
         5.1      Port........................................................................................VII-5
         5.2      Ports Available as Unbundled Network Elements...............................................VII-5
         5.3      Port Prices.................................................................................VII-6
         5.4      ............................................................................................VII-6
         Local Switching......................................................................................VII-6
         5.5      Compliance with Section.....................................................................VII-6

6.       Transport Facility...................................................................................VII-6
         6.1      Service Description.........................................................................VII-6
         6.2      Categories/Types............................................................................VII-6

7.       SS7 Transport and Signaling..........................................................................VII-6
         7.1      ............................................................................................VII-6

8.       LIDB Services........................................................................................VII-6

9.       Database 800-Type Services...........................................................................VII-7

10.      Data Switching.......................................................................................VII-7
         10.1     Access......................................................................................VII-7
         10.2     Nondiscrimination...........................................................................VII-7
         10.3     Testing, Monitoring, Administration and Maintenance.........................................VII-7


11.      Digital Cross Connect System (DCS)...................................................................VII-7

         11.1     Access......................................................................................VII-7
         11.2     Optional Characteristics....................................................................VII-7
</TABLE>


                                     -vii-

<PAGE>   9

<TABLE>
<S>      <C>                                                                                                 <C>
         11.3     Alternate Provisioning......................................................................VII-7
         11.4     Elements....................................................................................VII-7
         11.5     Capabilities................................................................................VII-7
         11.6     Protection and Performance..................................................................VII-7
         11.7     Provisioning, Administration and Maintenance................................................VII-7

12.      Operator Services (OS) and Directory Assistance (DA).................................................VII-8
         12.1     Customized Routing..........................................................................VII-8

13.      Advanced Intelligent Network Access (AIN)............................................................VII-8

14.      Nondiscrimination Provision and Support..............................................................VII-9

15.      Provisioning Intervals...............................................................................VII-9

16.      Directory Assistance Listing.........................................................................VII-9

ARTICLE VIII
         ADDITIONAL SERVICES AND COORDINATED SERVICE
         ARRANGEMENTS........................................................................................VIII-1

1.       Bona Fide Request Process...........................................................................VIII-1
         1.1      Intent.....................................................................................VIII-1
         1.2      Process....................................................................................VIII-1

2.       Transfer of Service Announcements...................................................................VIII-1

3.       Misdirected Calls...................................................................................VIII-1
         3.1      ...........................................................................................VIII-2
         3.2      ...........................................................................................VIII-2

4.       911/E911 Arrangements...............................................................................VIII-2
         4.1      Description of Service.....................................................................VIII-2
         4.2      Transport..................................................................................VIII-2
         4.3      Cooperation and Level of Performance.......................................................VIII-2
         4.4      Basic 911 and E911 General Requirements....................................................VIII-2
         4.5      Compensation...............................................................................VIII-6

5.       Information Services Traffic........................................................................VIII-6
         5.1      Routing....................................................................................VIII-6
         5.2      Billing and Collection and Information Service Provider (ISP) Remuneration.................VIII-6
         5.3      900-976 Call Blocking......................................................................VIII-7
         5.4      Miscellaneous..............................................................................VIII-7

6.       Telephone Relay Service.............................................................................VIII-7

7.       Directory Assistance (DA) and Operator Services (OS)................................................VIII-7
         7.1      Directory Assistance Calls.................................................................VIII-7
         7.2      Operator Services Calls....................................................................VIII-7

8.       Directory Assistance Listings Information...........................................................VIII-8
         8.1      ...........................................................................................VIII-8
         8.2      ...........................................................................................VIII-8
         8.3      ...........................................................................................VIII-8

9.       Directory Listings and Directory Distribution.......................................................VIII-8
</TABLE>


                                     -viii-

<PAGE>   10

<TABLE>
<S>     <C>                                                                                                 <C>
10.      Busy Line Verification and Busy Line Verification Interrupt.........................................VIII-8

11.      SAG.................................................................................................VIII-9

12.      Dialing Format Changes..............................................................................VIII-9

13.      Operational Support Systems (OSS)...................................................................VIII-9

ARTICLE IX
         COLLOCATION...........................................................................................IX-1

1.       Physical Collocation..................................................................................IX-1
         1.1      Space Planning...............................................................................IX-1
         1.2      Connection to Customer Loops and Ports.......................................................IX-1
         1.3      Connection to Other Collocated Carriers......................................................IX-1
         1.4      Choice of Vendor.............................................................................IX-1
         1.5      Monitoring...................................................................................IX-2
         1.6      Phone Service................................................................................IX-2
         1.7      Intraoffice Diversity........................................................................IX-2
         1.8      DTI Proprietary Information..................................................................IX-2
         1.9      Notification of Modifications................................................................IX-2
         1.10     Drawings.....................................................................................IX-2
         1.11     Construction of Space........................................................................IX-2
         1.12     Connection Equipment.........................................................................IX-3
         1.13     Access to DTI Collocation Space..............................................................IX-3

2.       Virtual Collocation...................................................................................IX-4
         2.1      Existing Virtual Collocation.................................................................IX-4
         2.2      Conversion from Physical to Virtual..........................................................IX-4
         2.3      Vendors......................................................................................IX-4
         2.4      Inspection...................................................................................IX-4

ARTICLE X
         ACCESS TO POLES, DUCTS, CONDUITS AND RIGHTS-OF-WAY.....................................................X-1

APPENDIX A
         GTE PERFORMANCE MEASURES (PM)..........................................................................A-1

APPENDIX B
         SERVICE MATRIX.........................................................................................B-1

APPENDIX C
         INTERCONNECTION, TELECOMMUNICATIONS SERVICES AND
         FACILITIES AGREEMENT...................................................................................C-1

APPENDIX D
         RATES AND CHARGES FOR TRANSPORT AND TERMINATION
         OF TRAFFIC.............................................................................................D-1

APPENDIX E
         RATES AND CHARGES FOR LOCAL NUMBER PORTABILITY USING RCF...............................................E-1

APPENDIX F
         SERVICES AVAILABLE FOR RESALE..........................................................................F-1
</TABLE>

                                      -ix-

<PAGE>   11

<TABLE>
<S>                                                                                                            <C>
APPENDIX G
         PRICES FOR UNBUNDLED ELEMENTS..........................................................................G-1

APPENDIX H
         RATES AND CHARGES FOR 911/E911 ARRANGEMENTS............................................................H-1

APPENDIX I
         SERVICE ORDERING, PROVISIONING, BILLING AND MAINTENANCE................................................I-1

APPENDIX J
         SS7 SERVICES...........................................................................................J-1

APPENDIX K
         POLE ATTACHMENT AGREEMENT..............................................................................K-1

APPENDIX L
         CONDUIT OCCUPANCY AGREEMENT............................................................................L-1

APPENDIX M
         RECIPROCAL COMPENSATION FOR CALL TERMINATION...........................................................M-1

APPENDIX 46A
         GTE TERMS..............................................................................................N-1

APPENDIX 46B
         OTHERCLEC TERMS........................................................................................O-1
</TABLE>


                                      -x-

<PAGE>   12



This Interconnection, Resale and Unbundling Agreement (the "Agreement"), is made
effective as of ____________, 199_, by and between GTE Southwest
Incorporated/GTE Midwest Incorporated/GTE Arkansas Incorporated, with its
address for purposes of this Agreement at 600 Hidden Ridge Drive, Irving, Texas
75038 ("GTE"), and Digital Teleport, Inc., in its capacity as a certified
provider of local dial-tone service ("DTI"), with its address for this Agreement
at 11111 Dorsett Road, St. Louis, Missouri 63043 (GTE and DTI being referred to
collectively as the "Parties" and individually as a "Party"). This Agreement
covers services in the State of Arkansas only (the "State").

WHEREAS, interconnection between competing Local Exchange Carriers ("LECs") is
necessary and desirable for the mutual exchange and termination of traffic
originating on each LEC's network; and

WHEREAS, the Parties desire to exchange such traffic and related signaling in a
technically and economically efficient manner at defined and mutually agreed
upon interconnection points; and

WHEREAS, the Parties wish to enter into an agreement to interconnect their
respective telecommunications networks on terms that are fair and equitable to
both Parties; and

WHEREAS, Section 251 of the Telecommunications Act of 1996 (the "Act") imposes
specific obligations on LECs with respect to the interconnection of their
networks, resale of their telecommunications services, access to their poles,
ducts, conduits and rights-of-way and, in certain cases, the offering of certain
unbundled network elements and physical collocation of equipment in LEC
premises;

WHEREAS, GTE is entering, under protest, into certain aspects of this Agreement
that incorporate adverse results from the arbitrated agreements approved or
which may be approved by the Commission in this state and is doing so in order
to avoid the expense of arbitration while at the same time preserving its legal
positions, rights and remedies.

NOW, THEREFORE, in consideration of the mutual provisions contained herein and
other good and valuable consideration, the receipt and sufficiency of which are
hereby acknowledged, GTE and DTI hereby covenant and agree as follows:



<PAGE>   13




                                    ARTICLE I
                          SCOPE AND INTENT OF AGREEMENT

Pursuant to this Agreement, the Parties will extend certain arrangements to one
another within each area in which they both operate within the State for
purposes of interconnection and the exchange of traffic between their respective
end user customers, and reciprocal access to poles, ducts, conduits and
rights-of-way. This Agreement also governs the purchase by DTI of certain
telecommunications services provided by GTE in its franchise areas for resale by
DTI, the purchase by DTI of certain unbundled network elements from GTE, and the
terms and conditions of the collocation of certain equipment of DTI in the
premises of GTE. This Agreement is an integrated package that reflects a
balancing of interests critical to the Parties. This Agreement will be submitted
to the Arkansas Public Service Commission ("the Commission") for approval. The
Parties agree that their entrance into this Agreement is without prejudice to
and does not waive any positions they may have taken previously, or may take in
the future, in any legislative, regulatory, judicial or other public forum
addressing any matters, including matters related to the same types of
arrangements and/or matters related to GTE's cost recovery covered in this
Agreement. DTI agrees to negotiate reciprocal terms and conditions with GTE
based on this Agreement. GTE's execution of this Agreement is not a concession
or waiver in any manner concerning its position that certain of the rates, terms
and conditions contained herein are unlawful, illegal and improper.

The services and facilities to be provided to DTI by GTE in satisfaction of this
Agreement may be provided pursuant to GTE tariffs and then current practices.
Should such services and facilities be modified by tariff or by Order, including
any modifications resulting from other Commission proceedings, federal court
review or other judicial action, such modifications will be deemed to
automatically supersede any rates and terms and conditions of this Agreement.
GTE will provide notification to DTI before such a tariff becomes effective, and
DTI may provide input on such proposed tariff. The Parties shall cooperate with
one another for the purpose of incorporating required modifications into this
Agreement.


                                       I-1
<PAGE>   14


                                   ARTICLE II
                                   DEFINITIONS

1.       General Definitions. Except as otherwise specified herein, the
         following definitions shall apply to all Articles and Appendices
         contained in this Agreement. Additional definitions that are specific
         to the matters covered in a particular Article may appear in that
         Article. To the extent that there may be any conflict between a
         definition set forth in this Article II and any definition in a
         specific Article or Appendix, the definition set forth in the specific
         Article or Appendix shall control with respect to that Article or
         Appendix.

         1.1      "ACCESS SERVICE REQUEST" (ASR) means an industry standard form
                  used by the Parties to add, establish, change or disconnect
                  services or trunks for the purposes of Interconnection.

         1.2      "ACT" means the Telecommunications Act of 1996, Public Law
                  104-104 of the 104th United States Congress effective February
                  8, 1996.

         1.3      "AFFILIATE" of a Party means a person, corporation or other
                  legal entity that, directly or indirectly, owns or controls a
                  Party, or is owned or controlled by, or is under common
                  ownership or control with a Party.

         1.4      "AMA" means the Automated Message Accounting structure
                  inherent in switch technology that initially records
                  telecommunication message information. AMA format is contained
                  in the Automated Message Accounting document, published by
                  Bellcore as GR-1100-CORE which defines the industry standard
                  for message recording.

         1.5      "APPLICABLE LAW" shall mean all laws, statutes, common law,
                  regulations, ordinances, codes, rules, guidelines, orders,
                  permits, and approvals of any Governmental Authority, which
                  apply or relate to the subject matter of this Agreement.

         1.6      "AUTOMATIC LOCATION IDENTIFICATION/DATA MANAGEMENT SYSTEM
                  (ALI/DMS)" means the emergency services (E911/911) database
                  containing customer location information (including name,
                  address, telephone number, and sometimes special information
                  from the local service provider) used to process subscriber
                  access records into Automatic Location Identification (ALI)
                  records. From this database, records are forwarded to GTE's
                  ALI Gateway for downloading by local ALI database systems to
                  be available for retrieval in response to ANI from a 9-1-1
                  call. Also, from this database, GTE will upload to its
                  selective routers the selective router ALI (SR/ALI) which is
                  used to determine to which Public Safety Answering Point
                  ("PSAP") to route the call.

         1.7      "AUTOMATIC NUMBER IDENTIFICATION" OR "ANI" refers to the
                  number transmitted through the network identifying the calling
                  party.

         1.8      "BELLCORE" means an organization owned jointly by the Bell
                  regional holding companies and that may in the future be owned
                  partially or totally by other persons, that conducts research
                  and development projects for its owners, including development
                  of new telecommunications services. Bellcore also provides
                  certain centralized technical and management services for the
                  regional holding companies and also provides generic
                  requirements for the telecommunications industry for products,
                  services and technologies.

         1.9      "BILL-AND-KEEP ARRANGEMENT" means a compensation arrangement
                  whereby the Parties do not render bills to each other for the
                  termination of local traffic specified in this Agreement and
                  whereby the Parties terminate local exchange traffic
                  originating from end-

                                      II-1


<PAGE>   15


                  users served by the networks of the other Party without
                  explicit charging among or between said carriers for such
                  traffic exchange.

         1.10     "BONA FIDE REQUEST (BFR)" process is intended to be used when
                  requesting customized Service Orders for certain services,
                  features, capabilities or functionality defined and agreed
                  upon by the Parties as services to be ordered as Bona Fide
                  Requests.

         1.11     "BUSINESS DAY" shall mean Monday through Friday, except for 
                  holidays on which the U.S. mail is not delivered.

         1.12     "CENTRAL OFFICE SWITCH" means a switch used to provide
                  telecommunications services including (I) "End Office
                  Switches" which are Class 5 switches from which end user
                  Exchange Services are directly connected and offered, and (ii)
                  "Tandem Office Switches" which are Class 4 switches which are
                  used to connect and switch trunk circuits between and among
                  central office switches. Central office switches may be
                  employed as combination end office/tandem office switches
                  (combination Class 5/Class 4).

         1.13     "CENTRALIZED MESSAGE DISTRIBUTION SYSTEM" (CMDS) means the
                  billing record and clearing house transport system that the
                  Regional Bell Operating Companies ("RBOCs") and other
                  incumbent LECs use to efficiently exchange out collects and in
                  collects as well as Carrier Access Billing System ("CABS")
                  records.

         1.14     "CLLI CODES" means Common Language Location Identifier Codes.

         1.15     "COMMERCIAL MOBILE RADIO SERVICES" (CMRS) means a radio
                  communication service between mobile stations or receivers and
                  land stations, or by mobile stations communicating among
                  themselves that is provided for profit and that makes
                  interconnected service available to the public or to such
                  classes of eligible users as to be effectively available to a
                  substantial portion of the public.

         1.16     "COMMISSION" means the Arkansas Public Service Commission.

         1.17     "COMMON CHANNEL SIGNALING" OR "CCS" means a high-speed
                  specialized packet-switched communications network that is
                  separate (out-of-band) from the public packet-switched and
                  message networks. CCS carries addressed signaling messages for
                  individual trunk circuits and/or database-related services
                  between Signaling Points in the CCS network using SS7
                  signaling protocol.

         1.18     "COMPETITIVE LOCAL EXCHANGE CARRIER" (CLEC) means any company
                  or person authorized to provide local exchange services in
                  competition with an ILEC.

         1.19     "COMPLIANCE" means environmental and safety laws and
                  regulations are based upon a federal regulatory framework,
                  with certain responsibilities delegated to the States. An
                  environmental/safety compliance program may include review of
                  applicable laws/regulations, development of written
                  procedures, training of employees and auditing.

         1.20     "CUSTOMER" may mean GTE or DTI depending on the context and
                  which Party is receiving the service from the other Party.

         1.21     "CUSTOMER USAGE DATA" means that the local telecommunications
                  services usage data of a CLEC customer, measured in minutes,
                  sub-minute increments, message units, or otherwise, that is
                  recorded and exchanged by the Parties.

         1.22     "DS-1" is a digital signal rate of 1.544 Mbps.

                                      II-2


<PAGE>   16



         1.23     "DS-3" is a digital signal rate of 44.736 Mbps.

         1.24     "ELECTRONIC FILE TRANSFER" refers to a system or process which
                  utilizes an electronic format and protocol to send/receive
                  data files.

         1.25     "EMR" means the Exchange Message Record which is an industry
                  standard record used to exchange telecommunications message
                  information among CLECs for billable, nonbillable, sample,
                  settlement and study data. EMR format is defined in
                  BR-010-200-010 CRIS Exchange Message Record, published by
                  Bellcore and which defines the industry standard for exchange
                  message records.

         1.26     "E-911 SERVICE" is a method of routing 911 calls to a Public
                  Service Answering Point that uses a customer location database
                  to determine the location to which a call should be routed.
                  E-9-1-1 service includes the forwarding of the caller's
                  Automatic Number Identification (ANI) to the PSAP where the
                  ANI is used to retrieve and display the Automatic Location
                  Identification (ALI) on a terminal screen at the answering
                  Attendant's position. It usually includes selective routing.

         1.27     "EXCHANGE SERVICE" refers to all basic access line services,
                  or any other services offered to end users which provide end
                  users with a telephonic connection to, and a unique telephone
                  number address on, the public switched telecommunications
                  network ("PSTN"), and which enable such end users to place or
                  receive calls to all other stations on the PSTN.

         1.28     "EIS" OR "EXPANDED INTERCONNECTION SERVICE" means a service
                  that provides interconnecting carriers with the capability to
                  terminate basic fiber optic transmission facilities, including
                  optical terminating equipment and multiplexers, at GTE's wire
                  centers and access tandems and interconnect those facilities
                  with the facilities of GTE. Microwave is available on a
                  case-by-case basis where feasible.

         1.29     "FACILITY" means all buildings, equipment, structures and
                  other items located on a single site or contiguous or adjacent
                  sites owned or operated by the same persons or person as used
                  in Article III, Section 44.

         1.30     "FCC" means the Federal Communications Commission.

         1.31     "GENERATOR" means under Resource Conservation Recovery Act
                  (RCRA), the person whose act produces a hazardous waste (40
                  CFR 261) or whose act first causes a hazardous waste to become
                  subject to regulation. The generator is legally responsible
                  for the proper management and disposal of hazardous wastes in
                  accordance with regulations.

         1.32     "GTOC" means GTE Telephone Operating Company.

         1.33     "GUIDE" means the GTE Open Market Transition Order/Processing
                  Guide/ALEC Customer Guide, which contains GTE's operating
                  procedures for ordering, provisioning, trouble reporting and
                  repair for resold services and unbundled elements. Except as
                  specifically provided otherwise in this Agreement, service
                  ordering, provisioning, billing and maintenance shall be
                  governed by the "Guide" which may be amended from time to time
                  by GTE as needed.

         1.34     "HAZARDOUS CHEMICAL" means as defined in the U.S. Occupational
                  Safety and Health (OSHA) hazard communication standard (29 CFR
                  1910.1200), any chemical which is a health hazard or physical
                  hazard.

                                      II-3


<PAGE>   17


         1.35     "HAZARDOUS WASTE" means as described in Resource Conservation
                  Recovery Act (RCRA), a solid waste(s) which may cause, or
                  significantly contribute to an increase in mortality or
                  illness or pose a substantial hazard to human health or the
                  environment when improperly treated, stored, transported or
                  disposed of or otherwise managed because of its quantity,
                  concentration or physical or chemical characteristics.

         1.36     "IMMINENT DANGER" means as described in the Occupational
                  Safety and Health Act and expanded for environmental matters,
                  any conditions or practices at a facility which are such that
                  a danger exists which could reasonably be expected to cause
                  death or serious harm or significant damage to the environment
                  or natural resources.

         1.37     "INCUMBENT LOCAL EXCHANGE CARRIER" (ILEC) means any local
                  exchange carrier that was as of February 8,1996, deemed to be
                  a member of the Exchange Carrier Association as set forth in
                  47 C.F.R. s.69.601(b) of the FCC's regulations.

         1.38     "INTERIM NUMBER PORTABILITY (INP)" means the delivery of LNP
                  capabilities, from a customer standpoint in terms of call
                  completion, with as little impairment of functioning, quality,
                  reliability, and convenience as possible and from a carrier
                  standpoint in terms of compensation, through the use of
                  existing and available call routing, forwarding, and
                  addressing capabilities.

         1.39     "INTERCONNECTION POINT" ("IP") means the physical point on the
                  network where the two parties interconnect. The "IP" is the
                  demarcation point between ownership of the transmission
                  facility.

         1.40     "ISDN USER PART (ISUP)" means a part of the SS7 protocol that
                  defines call setup messages and call takedown messages.

         1.41     "IXC" OR "INTEREXCHANGE CARRIER" means a telecommunications
                  service provider authorized by the FCC to provide interstate
                  long distance communications services between LATAs and are
                  authorized by the State to provide inter- and/or intraLATA
                  long distance communications services within the State.

         1.42     "INTERNETWORK FACILITIES" OR "INTERCONNECTION FACILITY" means
                  the physical connection of separate pieces of equipment,
                  transmission facilities, etc., within, between and among
                  networks, for the transmission and routing of exchange service
                  and exchange access.

         1.43     "LATA" means Local Access and Transport Area. A LATA denotes a
                  geographic area for the provision and administration of
                  communications service; i.e., intraLATA or interLATA.

         1.44     "LINE INFORMATION DATA BASE (LIDB)" means one or all, as the
                  context may require, of the Line Information databases owned
                  individually by GTE and other entities which provide, among
                  other things, calling card validation functionality for
                  telephone line number cards issued by GTE and other entities.
                  A LIDB also contains validation data for collect and third
                  number-billed calls; i.e., Billed Number Screening.

         1.45     "LINE SIDE" refers to an end office switch connection that has
                  been programmed to treat the circuit as a local line connected
                  to an ordinary telephone station set. Line side connections
                  offer only those transmission and signaling features
                  appropriate for a connection between an end office and an
                  ordinary telephone set.

         1.46     "LOCAL EXCHANGE CARRIER" OR "LEC" means any company certified
                  by the Commission to provide local exchange telecommunications
                  service. This includes the Parties to this Agreement.

                                      II-4


<PAGE>   18


         1.47     "LOCAL EXCHANGE ROUTING GUIDE" OR "LERG" means the Bellcore
                  reference customarily used to identify NPA-NXX routing and
                  homing information, as well as network element and equipment
                  designation.

         1.48     "LOCAL NUMBER PORTABILITY (LNP)" means the ability of users of
                  telecommunications services to retain, at the same location,
                  existing telecommunications numbers without impairment of
                  quality, reliability, or convenience when switching from one
                  telecommunications carrier to another.

         1.49     "LOCAL TRAFFIC" means traffic that is originated by an end
                  user of one Party and terminates to the end user of the other
                  Party within GTE's then current local serving area, including
                  mandatory local calling scope arrangements. A mandatory local
                  calling scope arrangement is an arrangement that provides end
                  users a local calling scope, Extended Area Service ("EAS"),
                  beyond their basic exchange serving area. Local Traffic does
                  not include optional local calling scopes (i.e., optional rate
                  packages that permit the end user to choose a local calling
                  scope beyond their basic exchange serving area for an
                  additional fee), referred to hereafter as "optional EAS."
                  Local Traffic excludes Information Service Provider ("ISP")
                  traffic (e.g., Internet, paging, 900-976, etc.).

         1.50     "MDF" OR "MAIN DISTRIBUTION FRAME" means the distribution
                  frame used to interconnect cable pairs and line trunk
                  equipment terminating on a switching system.

         1.51     "MEET-POINT BILLING" OR "MPB" refers to an arrangement whereby
                  two LECs jointly provide the transport element of a switched
                  access service to one of the LEC's end office switches, with
                  each LEC receiving an appropriate share of the transport
                  element revenues as defined by their effective access tariffs.

         1.52     "MECAB" refers to the Multiple Exchange Carrier Access Billing
                  ("MECAB") document prepared by the Billing Committee of the
                  Ordering and Billing Forum ("OBF"), which functions under the
                  auspices of the Carrier Liaison Committee ("CLC") of the
                  Alliance for Telecommunications Industry Solutions ("ATIS").
                  The MECAB document, published by Bellcore as Special Report
                  SR-BDS-000983, contains the recommended guidelines for the
                  billing of an access service provided by two or more LECs, or
                  by one LEC in two or more states within a single LATA.

         1.53     "MECOD" refers to the Multiple Exchange Carriers Ordering and
                  Design ("MECOD") Guidelines for Access Services - Industry
                  Support Interface, a document developed by the
                  Ordering/Provisioning Committee under the auspices of the
                  Ordering and Billing Forum ("OBF"), which functions under the
                  auspices of the Carrier Liaison Committee ("CLC") of the
                  Alliance for Telecommunications Industry Solutions ("ATIS").
                  The MECOD document, published by Bellcore as Special Report
                  SR-STS-002643, establish methods for processing orders for
                  access service which is to be provided by two or more LECs.

         1.54     "MID-SPAN FIBER MEET" means an Interconnection architecture
                  whereby two carriers' fiber transmission facilities meet at a
                  mutually agreed-upon POI.


         1.55     "NANP" means the "North American Numbering Plan", the system
                  of telephone numbering employed in the United States, Canada,
                  and the Caribbean countries that employ NPA 809.

         1.56     "NETWORK ELEMENT" means a facility or equipment used in the
                  provision of a telecommunications service. Network Element
                  includes features, functions, and capabilities that are
                  provided by means of such facility or equipment, including
                  subscriber

                                      II-5


<PAGE>   19


                  numbers, databases, signaling systems, and information
                  sufficient for billing and collection or used in the
                  transmission, routing, or other provision of a
                  telecommunications service.

         1.57     "NID" OR "NETWORK INTERFACE DEVICE" means the point of
                  demarcation between the end user's inside wiring and GTE's
                  facilities.

         1.58     "NUMBERING PLAN AREA" OR "NPA" is also sometimes referred to
                  as an area code. This is the three digit indicator which is
                  defined by the "A", "B", and "C" digits of each 10-digit
                  telephone number within the NANP. Each NPA contains 800
                  possible NXX Codes. There are two general categories of NPA,
                  "Geographic NPAs" and "Non-Geographic NPAs". A Geographic NPA
                  is associated with a defined geographic area, and all
                  telephone numbers bearing such NPA are associated with
                  services provided within that geographic area. A
                  Non-Geographic NPA, also known as a "Service Access Code" or
                  "SAC Code" is typically associated with a specialized
                  telecommunications service which may be provided across
                  multiple geographic NPA areas. 800, 900, 700, and 888 are
                  examples of Non-Geographic NPAs.

         1.59     "NXX", "NXX CODE", "CENTRAL OFFICE CODE" OR "CO CODE" is the
                  three digit switch entity indicator which is defined by the
                  "D", "E", and "F" digits of a 10-digit telephone number within
                  the NANP. Each NXX Code contains 10,000 station numbers.

         1.60     "911 SERVICE" means a universal telephone number which gives
                  the public direct access to the PSAP. Basic 911 service
                  collects 911 calls from one or more local exchange switches
                  that serve a geographic area. The calls are then sent to the
                  correct authority designated to receive such calls.

         1.61     "OWNER AND OPERATOR" means as used in OSHA regulations, owner
                  is the legal entity, including a lessee, which exercises
                  control over management and record keeping functions relating
                  to a building or facility. As used in the Resource
                  Conservation and Recovery Act (RCRA), operator means the
                  person responsible for the overall (or part of the) operations
                  of a facility.

         1.62     "POI" means Point of Interconnection designated for routing of
                  local interconnection trunks.

         1.63     "POLE ATTACHMENT" has the meaning as set forth in Article X 
                  and Appendix K of this Agreement.

         1.64     "PROVIDER" may mean GTE or DTI depending on the context and
                  which Party is providing the service to the other Party.

         1.65     "PUBLIC SAFETY ANSWERING POINT" OR "PSAP" means an answering
                  location for 9-1-1 calls originating in a given area. A PSAP
                  may be designated as Primary or Secondary, which refers to the
                  order in which calls are directed for answering. Primary PSAPs
                  respond first; Secondary PSAPs receive calls on a transfer
                  basis only, and generally serve as a centralized answering
                  location for a particular type of emergency call. PSAPs are
                  staffed by employees of Emergency Response Agencies ("ERAs")
                  such as police, fire or emergency medical agencies or by
                  employees of a common bureau serving a group of such entities.

         1.66     "RATE CENTER" means the specific geographic point and
                  corresponding geographic area that are associated with one or
                  more particular NPA-NXX Codes that have been assigned to a LEC
                  for its provision of Exchange Services. The geographic point
                  is identified by a specific Vertical and Horizontal (V&H)
                  coordinate that is used to calculate distance-

                                      II-6


<PAGE>   20


                  sensitive end user traffic to/from the particular NPA-NXXs
                  associated with the specific Rate Center.

         1.67     "RIGHT-OF-WAY" OR "ROW" means the right to use the land or
                  other property of another party to place poles, conduits,
                  cables, other structures and equipment, or to provide passage
                  to access such structures and equipment. A ROW may run under,
                  on, or above public or private property (including air space
                  above public or private property) and may include the right to
                  use discrete space in buildings, building complexes, or other
                  locations.

         1.68     "ROUTING POINT" denotes a location that a LEC has designated
                  on its network as the homing (routing) point for traffic that
                  terminates to Exchange Services provided by the LEC that bear
                  a certain NPA-NXX designation. The Routing Point is used to
                  calculate airline mileage for the distance-sensitive transport
                  element charges of Switched Access Services. Pursuant to
                  Bellcore Practice BR795-100-100, the Routing Point may be an
                  end office location, or a "LEC Consortium Point of
                  Interconnection." The Routing Point must be in the same LATA
                  as the associated NPA-NXX.

         1.69     "SERVICE CONTROL POINT" OR "SCP" is the node in the signaling
                  network to which informational requests for service handling,
                  such as routing, are directed and processed. The SCP is a real
                  time database system that, based on a query from the SSP,
                  performs subscriber or application-specific service logic, and
                  then sends instructions back to the SSP on how to continue
                  call processing.

         1.70     "SERVICE SWITCHING POINT" OR "SSP" means a Signaling Point
                  that can launch queries to databases and receive/interpret
                  responses used to provide specific customer services.

         1.71     "SIGNALING POINT" OR "SP" means a node in the CCS network that
                  originates and/or receives signaling messages, or transfers
                  signaling messages from one signaling link to another, or
                  both.

         1.72     "SIGNALING SYSTEM 7" OR "SS7" means the signaling protocol,
                  Version 7, of the CCS network, based upon American National
                  Standards Institute ("ANSI") standards.

         1.73     "SIGNAL TRANSFER POINT" OR "STP" means a packet switch in the
                  CCS network that is used to route signaling messages among
                  SSPs, SCPs and other STPs in order to set up calls and to
                  query databases for advanced services. GTE's network includes
                  mated pairs of local and regional STPs. STPs are provided in
                  pairs for redundancy. GTE STPs conform to ANSI T1.111-8
                  standards.

         1.74     "SUBSIDIARY" of a Party means a corporation or other legal 
                  entity that is majority owned by such Party.

         1.75     "SYNCHRONOUS OPTICAL NETWORK" OR "SONET" means synchronous
                  electrical ("STS") or optical channel ("OC") connections
                  between LECs.

         1.76     "SWITCHED ACCESS SERVICE" means the offering of facilities for
                  the purpose of the origination or termination of traffic to or
                  from Exchange Service customers in a given area pursuant to a
                  switched access tariff. Switched Access Services include:
                  Feature Group A, Feature Group B. Feature Group C, Feature
                  Group D, 800 access and 900 access services.

         1.77     "TELECOMMUNICATIONS SERVICES" means the offering of
                  telecommunications for a fee directly to the public, or to
                  such classes of users as to be effectively available directly
                  to the public, regardless of the facilities used.

                                      II-7


<PAGE>   21


         1.78     "THIRD PARTY CONTAMINATION" means environmental pollution that
                  is not generated by the LEC or DTI but results from off-site
                  activities impacting a facility.

         1.79     "TRUNK SIDE" refers to a central office switch connection that
                  is capable of, and has been programmed to treat the circuit
                  as, connecting to another switching entity, for example, to
                  another central office switch. Trunk side connections offer
                  those transmission and signaling features appropriate for the
                  connection of switching entities and cannot be used for the
                  direct connection of ordinary telephone station sets.

         1.80     "UNDEFINED TERMS" means the Parties acknowledge that terms may
                  appear in this Agreement which are not defined and agree that
                  any such terms shall be construed in accordance with their
                  customary usage in the telecommunications industry as of the
                  effective date of this Agreement.

         1.81     "VERTICAL FEATURES" (INCLUDING "CLASS FEATURES") means
                  vertical services and switch functionalities provided by GTE,
                  including: Automatic Call Back; Automatic Recall; Call
                  Forwarding Busy Line/Don't Answer; Call Forwarding Don't
                  Answer; Call Forwarding Variable; Call Forwarding - Busy Line;
                  Call Trace; Call Waiting; Call Number Delivery Blocking Per
                  Call; Calling Number Blocking Per Line; Cancel Call Waiting;
                  Distinctive Ringing/Call Waiting; Incoming Call Line
                  Identification Delivery; Selective Call Forward; Selective
                  Call Rejection; Speed Calling; and Three Way Calling/Call
                  Transfer.

         1.82     "WIRE CENTER" means a building or space within a building that
                  serves as an aggregation point on a LEC's network, where
                  transmission facilities and circuits are connected or
                  switched. "Wire center" can also denote a building in which
                  one or more Central Offices, used for the provision of
                  exchange services and access services, are located.


                                      II-8


<PAGE>   22



                                   ARTICLE III
                               GENERAL PROVISIONS


1.       Scope of General Provisions. Except as may otherwise be set forth in a
         particular Article or Appendix of this Agreement, in which case the
         provisions of such Article or Appendix shall control, these General
         Provisions apply to all Articles and Appendices of this Agreement.

2.       Term and Termination.

         2.1      Term. Subject to the termination provisions contained in this
                  Agreement, the term of this Agreement shall be two (2) years
                  from the effective date referenced in the first paragraph of
                  this Agreement and shall continue in effect for consecutive
                  one (1) year terms until either Party gives the other Party at
                  least ninety (90) calendar days written notice of termination,
                  which termination shall be effective at the end of the
                  then-current term. In the event notice is given less than 90
                  calendar days prior to the end of the current term, this
                  Agreement shall remain in effect for 90 calendar days after
                  such notice is received, provided, that in no case shall the
                  term be extended beyond 90 calendar days after the end of the
                  current term.

         2.2      Post-Termination Arrangements. Except in the case of
                  termination as a result of either Party's default or a
                  termination upon sale, for service arrangements made available
                  under this Agreement and existing at the time of termination,
                  those arrangements may continue without interruption (a) under
                  a new agreement voluntarily executed by the Parties; (b)
                  standard terms and conditions approved and made generally
                  effective by the Commission, if any; (c) tariff terms and
                  conditions made generally available to all CLECs; or (d) any
                  rights under Section 252(I) of the Act.

         2.3      Termination Upon Default. Either Party may terminate this
                  Agreement in whole or in part in the event of a default by the
                  other Party; provided however, that the non-defaulting Party
                  notifies the defaulting party in writing of the alleged
                  default and that the defaulting Party does not cure the
                  alleged default within sixty (60) calendar days of receipt of
                  written notice thereof.  Default is defined to include:

         (a)      A Party's insolvency or the initiation of bankruptcy or 
                  receivership proceedings by or against the Party; or

         (b)      A Party's refusal or failure in any material respect properly
                  to perform its obligations under this Agreement, or the
                  violation any of the material terms or conditions of this
                  Agreement.

         2.4      Termination Upon Sale. Notwithstanding anything to the
                  contrary contained herein, a Party may terminate this
                  Agreement as to a specific operating area or portion thereof
                  of such Party if such Party sells or otherwise transfers the
                  area or portion thereof. The Party shall provide the other
                  Party with at least ninety (90) calendar days' prior written
                  notice of such termination, which shall be effective on the
                  date specified in the notice. Notwithstanding termination of
                  this Agreement as to a specific operating area, this Agreement
                  shall remain in full force and effect in the remaining
                  operating areas.

         2.5      Liability upon Termination. Termination of this Agreement, or
                  any part hereof, for any cause shall not release either Party
                  from any liability which at the time of termination had
                  already accrued to the other Party or which thereafter accrues
                  in any respect to any act or omission occurring prior to the
                  termination or from an obligation which is expressly stated in
                  this Agreement to survive termination.


                                     III-1


<PAGE>   23


3.       Amendments. Any amendment, modification, or supplement to this
         Agreement must be in writing and signed by an authorized representative
         of each Party. The term "this Agreement" shall include future
         amendments, modifications, and supplements.

4.       Assignment. Any assignment by either Party of any right, obligation, or
         duty, in whole or in part, or of any interest, without the written
         consent of the other Party shall be void, except that either Party may
         assign all of its rights, and delegate its obligations, liabilities and
         duties under this Agreement, either in whole or in part, to any entity
         that is, or that was immediately preceding such assignment, a
         Subsidiary or Affiliate of that Party without consent, but with written
         notification. The effectiveness of an assignment shall be conditioned
         upon the assignee's written assumption of the rights, obligations, and
         duties of the assigning Party.

5.       Authority. Each person whose signature appears on this Agreement
         represents and warrants that he or she has authority to bind the Party
         on whose behalf he or she has executed this Agreement.

6.       Responsibility for Payment. All charges for Services provided under
         this Agreement will be billed to DTI, including all applicable taxes
         and surcharges. In addition, the End User Common Line (EUCL) Charge
         from GTOC Tariff FCC No. 1 is applicable to Resold Services. DTI is
         responsible for payment of charges billed regardless of any billing
         arrangements or situation between DTI and its end user customer.

7.       Billing and Payment. Except as provided elsewhere in this Agreement and
         where applicable, in conformance with MECAB and MECOD guidelines, DTI
         and GTE agree to exchange all information to accurately, reliably, and
         properly bill for features, functions and services rendered under this
         Agreement.

         7.1      Dispute. If one Party disputes a billing statement issued by
                  the other Party, the billed Party shall notify Provider in
                  writing regarding the nature and the basis of the dispute
                  within six (6) months of the statement date or the dispute
                  shall be waived. The Parties shall diligently work toward
                  resolution of all billing issues.

         7.2      Late Payment Charge. If any undisputed amount due on the
                  billing statement is not received by Provider on the payment
                  due date, Provider may charge, and Customer agrees to pay, at
                  Provider's option, interest on the past due balance at a rate
                  equal to the lesser of the interest rates set forth in the
                  applicable GTE/Contel state access tariffs or the GTOC/GSTC
                  FCC No. 1 tariff, one and one-half percent (1 1/2%) per month
                  or the maximum nonusurious rate of interest under applicable
                  law. Late payment charges shall be included on the next
                  statement.

         7.3      Due Date.  Payment is due 30 calendar days from the bill date.

         7.4      Audits. Either Party may conduct an audit of the other Party's
                  books and records pertaining to the Services provided under
                  this Agreement, no more frequently than once per twelve (12)
                  month period, to evaluate the other Party's accuracy of
                  billing, data and invoicing in accordance with this Agreement.
                  Any audit shall be performed as follows: (I) following at
                  least thirty (30) Business Days' prior written notice to the
                  audited Party; (ii) subject to the reasonable scheduling
                  requirements and limitations of the audited Party; (iii) at
                  the auditing Party's sole cost and expense; (iv) of a
                  reasonable scope and duration; (v) in a manner so as not to
                  interfere with the audited Party's business operations; and
                  (vi) in compliance with the audited Party's security rules.

8.       Binding Effect. This Agreement shall be binding on and inure to the
         benefit of the respective successors and permitted assigns of the
         Parties.


                                     III-2


<PAGE>   24


9.       Capacity Planning and Forecasting. Within thirty (30) days from the
         Effective Date of this Agreement, the Parties agree to have met and
         developed joint planning and forecasting responsibilities which are
         applicable to Local Services, including Features, Network Elements,
         INP, Interconnection Services, Collocation, Poles, Conduits and Rights
         of Way (ROW). Such responsibilities shall include but are not limited
         to the following:

         (a) The Parties will establish periodic reviews of network and
         technology plans and will notify one another no later than six (6)
         months in advance of changes that would impact either Party's provision
         of services.

         (b) DTI will furnish to GTE information that provides for state-wide
         annual forecasts of order activity, in-service quantity forecasts, and
         facility/demand forecasts.

         (c) The Parties will develop joint forecasting responsibilities for
         traffic utilization over trunk groups and yearly forecasted trunk
         quantities.

         (d) DTI shall notify GTE promptly of changes to current forecasts
         (increase or decrease) that generate a shift in the demand curve for
         the following forecasting period.

10.      Compliance with Laws and Regulations. Each Party shall comply with all
         federal, state, and local statutes, regulations, rules, ordinances,
         judicial decisions, and administrative rulings applicable to its
         performance under this Agreement.

11.      Confidential Information.

         11.1     Identification. Either Party may disclose to the other
                  proprietary or confidential customer, technical, or business
                  information in written, graphic, oral or other tangible or
                  intangible forms ("Confidential Information"). In order for
                  information to be considered Confidential Information under
                  this Agreement, it must be marked "Confidential" or
                  "Proprietary," or bear a marking of similar import. Orally or
                  visually disclosed information shall be deemed Confidential
                  Information only if contemporaneously identified as such and
                  reduced to writing and delivered to the other Party with a
                  statement or marking of confidentially within thirty (30)
                  calendar days after oral or visual disclosure.

         Notwithstanding the foregoing, preorders and all orders for Services or
         network elements placed by DTI pursuant to this Agreement, and
         information that would constitute customer proprietary network
         information of DTI end user customers pursuant to the Act and the rules
         and regulations of the FCC, as well as recorded usage information with
         respect to DTI end users, whether disclosed by DTI to GTE or otherwise
         acquired by GTE in the course of its performance under this Agreement,
         and where GTE is the NANP Number Plan Administrator, DTI information
         submitted to GTE in connection with such responsibilities shall be
         deemed Confidential Information of DTI for all purposes under this
         Agreement whether or not specifically marked or designated as
         confidential or proprietary.

         11.2     Handling. In order to protect such Confidential Information
                  from improper disclosure, each Party agrees:

         (a)      That all Confidential Information shall be and shall remain 
                  the exclusive property of the source;

         (b)      To limit access to such Confidential Information to authorized
                  employees who have a need to know the Confidential Information
                  for performance of this Agreement;


                                     III-3


<PAGE>   25


         (c)      To keep such Confidential Information confidential and to use
                  the same level of care to prevent disclosure or unauthorized
                  use of the received Confidential Information as it exercises
                  in protecting its own Confidential Information of a similar
                  nature;

         (d)      Not to copy, publish, or disclose such Confidential
                  Information to others or authorize anyone else to copy,
                  publish, or disclose such Confidential Information to others
                  without the prior written approval of the source;

         (e)      To return promptly any copies of such Confidential 
                  Information to the source at its request; and

         (f)      To use such Confidential Information only for purposes of
                  fulfilling work or services performed hereunder and for other
                  purposes only upon such terms as may be agreed upon between
                  the Parties in writing.

         11.3     Exceptions. These obligations shall not apply to any
                  Confidential Information that was legally in the recipient's
                  possession prior to receipt from the source, was received in
                  good faith from a Third Party not subject to a confidential
                  obligation to the source, now is or later becomes publicly
                  known through no breach of confidential obligation by the
                  recipient, was developed by the recipient without the
                  developing persons having access to any of the Confidential
                  Information received in confidence from the source, or that is
                  required to be disclosed pursuant to subpoena or other process
                  issued by a court or administrative agency having appropriate
                  jurisdiction, provided, however, that the recipient shall give
                  prior notice to the source and shall reasonably cooperate if
                  the source deems it necessary to seek protective arrangements.

         11.4     Survival. The obligation of confidentiality and use with
                  respect to Confidential Information disclosed by one Party to
                  the other shall survive any termination of this Agreement for
                  a period of three (3) years from the date of the initial
                  disclosure of the Confidential Information.

12.      Consent. Where consent, approval, or mutual agreement is required of a
         Party, it shall not be unreasonably withheld or delayed.

13.      Cooperation on Fraud Minimization. DTI assumes responsibility for all
         fraud associated with its end user customers and accounts. GTE shall
         have no responsibility for, nor is it required to investigate or make
         adjustments to DTI's account in cases of fraud. The Parties agree that
         they shall cooperate with one another to resolve cases of fraud. The
         Parties' fraud minimization procedures are to be cost effective and
         implemented so as not to unduly burden or harm one Party as compared to
         the other.

14.      Dispute Resolution.

         14.1     Alternative to Litigation. Except as provided under Section
                  252 of the Act with respect to the approval of this Agreement
                  by the Commission, the Parties desire to resolve disputes
                  arising out of or relating to this Agreement without
                  litigation. Accordingly, except for action seeking a temporary
                  restraining order or an injunction related to the purposes of
                  this Agreement, or suit to compel compliance with this dispute
                  resolution process, the Parties agree to use the following
                  alternative dispute resolution procedures as their sole remedy
                  with respect to any controversy or claim arising out of or
                  relating to this Agreement or its breach.

         14.2     Negotiations. At the written request of a Party, each Party
                  will appoint a knowledgeable, responsible representative to
                  meet and negotiate in good faith to resolve any dispute
                  arising out of or relating to this Agreement. The Parties
                  intend that these negotiations be

                                     III-4


<PAGE>   26



                  conducted by non-lawyer, business representatives. The
                  location, format, frequency, duration, and conclusion of these
                  discussions shall be left to the discretion of the
                  representatives. Upon agreement, the representatives may
                  utilize other alternative dispute resolution procedures such
                  as mediation to assist in the negotiations. Discussions and
                  correspondence among the representatives for purposes of these
                  negotiations shall be treated as confidential information
                  developed for purposes of settlement, exempt from discovery,
                  and shall not be admissible in the arbitration described below
                  or in any lawsuit without the concurrence of all Parties.
                  Documents identified in or provided with such communications,
                  which are not prepared for purposes of the negotiations, are
                  not so exempted and may, if otherwise discoverable, be
                  discovered or otherwise admissible, be admitted in evidence,
                  in the arbitration or lawsuit.

         14.3     Arbitration. If the negotiations do not resolve the dispute
                  within sixty (60) Business Days of the initial written
                  request, the dispute shall be submitted to binding arbitration
                  by a single arbitrator pursuant to the Commercial Arbitration
                  Rules of the American Arbitration Association except that the
                  Parties may select an arbitrator outside American Arbitration
                  Association rules upon mutual agreement. A Party may demand
                  such arbitration in accordance with the procedures set out in
                  those rules. Discovery shall be controlled by the arbitrator
                  and shall be permitted to the extent set out in this section.
                  Each Party may submit in writing to a Party, and that Party
                  shall so respond to, a maximum of any combination of
                  thirty-five (35) (none of which may have subparts) of the
                  following: interrogatories, demands to produce documents, or
                  requests for admission. Each Party is also entitled to take
                  the oral deposition of one individual of another Party.
                  Additional discovery may be permitted upon mutual agreement of
                  the Parties. The arbitration hearing shall be commenced within
                  sixty (60) Business Days of the demand for arbitration. The
                  arbitration shall be held in a mutually agreeable city. The
                  arbitrator shall control the scheduling so as to process the
                  matter expeditiously. The Parties may submit written briefs.
                  The arbitrator shall rule on the dispute by issuing a written
                  opinion within thirty (30) Business Days after the close of
                  hearings. The times specified in this section may be extended
                  upon mutual agreement of the Parties or by the arbitrator upon
                  a showing of good cause. Judgment upon the award rendered by
                  the arbitrator may be entered in any court having
                  jurisdiction.

         14.4     Expedited Arbitration Procedures. If the issue to be resolved
                  through the negotiations referenced in Section 14.2 directly
                  and materially affects service to either Party's end user
                  customers, then the period of resolution of the dispute
                  through negotiations before the dispute is to be submitted to
                  binding arbitration shall be five (5) Business Days. Once such
                  a service affecting dispute is submitted to arbitration, the
                  arbitration shall be conducted pursuant to the expedited
                  procedures rules of the Commercial Arbitration Rules of the
                  American Arbitration Association (i.e., rules 53 through 57).

         14.5     Costs. Each Party shall bear its own costs of these
                  procedures. A Party seeking discovery shall reimburse the
                  responding Party the costs of production of documents
                  (including search time and reproduction costs). The Parties
                  shall equally split the fees of the arbitration and the
                  arbitrator.

         14.6     Continuous Service. The Parties shall continue providing
                  services to each other during the pendency of any dispute
                  resolution procedure, and the Parties shall continue to
                  perform their obligations (including making payments in
                  accordance with Article IV, Section 4) in accordance with this
                  Agreement.

15.      Entire Agreement.  This Agreement constitutes the entire agreement of 
         the Parties pertaining to the subject matter of this Agreement and
         supersedes all prior agreements, negotiations, proposals, and
         representations, whether written or oral, and all contemporaneous oral
         agreements, negotiations, proposals, and representations concerning
         such subject matter. No

                                     III-5


<PAGE>   27


         representations, understandings, agreements, or warranties, expressed
         or implied, have been made or relied upon in the making of this
         Agreement other than those specifically set forth herein.

16.      Expenses. Except as specifically set out in this Agreement, each Party
         shall be solely responsible for its own expenses involved in all
         activities related to the subject of this Agreement.

17.      Force Majeure.  In the event performance of this Agreement, or any 
         obligation hereunder, is either directly or indirectly prevented,
         restricted, or interfered with by reason of fire, flood, earthquake or
         likes acts of God, wars, revolution, civil commotion, explosion, acts
         of public enemy, embargo, acts of the government in its sovereign
         capacity, labor difficulties, including without limitation, strikes,
         slowdowns, picketing, or boycotts, unavailability of equipment from
         vendor, changes requested by Customer, or any other circumstances
         beyond the reasonable control and without the fault or negligence of
         the Party affected, the Party affected, upon giving prompt notice to
         the other Party, shall be excused from such performance on a day-to-day
         basis to the extent of such prevention, restriction, or interference
         (and the other Party shall likewise be excused from performance of its
         obligations on a day-to-day basis until the delay, restriction or
         interference has ceased); provided however, that the Party so affected
         shall use diligent efforts to avoid or remove such causes of
         nonperformance and both Parties shall proceed whenever such causes are
         removed or cease.

18.      Good Faith Performance. In the performance of their obligations under
         this Agreement, the Parties shall act in good faith. In situations in
         which notice, consent, approval or similar action by a Party is
         permitted or required by any provision of this Agreement, such action
         shall not be unreasonably delayed, withheld or conditioned.

19.      Governing Law. This Agreement shall be governed by and construed in
         accordance with the domestic laws of the state where the Services are
         provided or the facilities reside and shall be subject to the exclusive
         jurisdiction of the courts therein.

20.      Standard Practices. The Parties acknowledge that GTE shall be adopting
         some industry standard approaches and/or establishing its own standard
         approaches to various requirements hereunder applicable to DTI industry
         which may be added in the Guide. DTI agrees that GTE may implement such
         approaches to satisfy any GTE obligations under this Agreement. A copy
         is attached hereto as Appendix A and is incorporated by reference into
         this Agreement.

21.      Headings. The headings in this Agreement are inserted for convenience
         and identification only and shall not be considered in the
         interpretation of this Agreement.

22.      Independent Contractor Relationship.  The persons provided by each 
         Party shall be solely that Party's employees and shall be under the
         sole and exclusive direction and control of that Party. They shall not
         be considered employees of the other Party for any purpose. Each Party
         shall remain an independent contractor with respect to the other and
         shall be responsible for compliance with all laws, rules and
         regulations involving, but not limited to, employment of labor, hours
         of labor, health and safety, working conditions and payment of wages.
         Each Party shall also be responsible for payment of taxes, including
         federal, state and municipal taxes, chargeable or assessed with respect
         to its employees, such as Social Security, unemployment, workers'
         compensation, disability insurance, and federal and state withholding.
         Each Party shall indemnify the other for any loss, damage, liability,
         claim, demand, or penalty that may be sustained by reason of its
         failure to comply with this provision.

23.      Law Enforcement Interface.

         23.1     Except to the extent not available in connection with GTE's
                  operation of its own business, GTE shall provide seven day a
                  week/twenty-four hour a day assistance to law enforcement

                                     III-6


<PAGE>   28


                  persons for emergency traps, assistance involving emergency
                  traces and emergency information retrieval on customer invoked
                  CLASS services, including, without limitation, call traces
                  requested by DTI.

         23.2     GTE agrees to work jointly with DTI in security matters to
                  support law enforcement agency requirements for taps, traces,
                  court orders, etc. Charges for providing such services for DTI
                  Customers will be billed to DTI.

         23.3     GTE will, in non emergency situations, inform the requesting
                  law enforcement agencies that the end-user to be wire tapped,
                  traced, etc. is a DTI Customer and shall refer them to DTI.

24.      Liability and Indemnity.

         24.1     Indemnification. Subject to the limitations set forth in
                  Section 24.4 of this Article III, each Party agrees to
                  release, indemnify, defend, and hold harmless the other Party
                  from all losses, claims, demands, damages, expenses, suits, or
                  other actions, or any liability whatsoever, including, but not
                  limited to, costs and attorney's fees, whether suffered, made,
                  instituted, or asserted by any other party or person, for
                  invasion of privacy, personal injury to or death of any person
                  or persons, or for losses, damages, or destruction of
                  property, whether or not owned by others, proximately caused
                  by the indemnifying Party's negligence or willful misconduct,
                  regardless of form of action. The indemnified Party agrees to
                  notify the other Party promptly, in writing, of any written
                  claims, lawsuits, or demands for which it is claimed that the
                  indemnifying Party is responsible under this Section and to
                  cooperate in every reasonable way to facilitate defense or
                  settlement of claims. The indemnifying Party shall have
                  complete control over defense of the case and over the terms
                  of any proposed settlement or compromise thereof. The
                  indemnifying Party shall not be liable under this Section for
                  settlement by the indemnified Party or any claim, lawsuit, or
                  demand, if the indemnifying Party has not approved the
                  settlement in advance, unless the indemnifying Party has had
                  the defense of the claim, lawsuit, or demand tendered to it in
                  writing and has failed to assume such defense. In the event of
                  such failure to assume defense, the indemnifying Party shall
                  be liable for any reasonable settlement made by the
                  indemnified Party without approval of the indemnifying Party.

         24.2     End User and Content-Related Claims. Each Party agrees to
                  release, indemnify, defend, and hold harmless the other Party,
                  its affiliates, and any third-party provider or operator of
                  facilities involved in the provision of Services, Unbundled
                  Network Elements or Facilities under this Agreement
                  (collectively, the "Indemnified Party") from all losses,
                  claims, demands, damages, expenses, suits, or other actions,
                  or any liability whatsoever, including, but not limited to,
                  costs and attorney's fees, suffered, made, instituted, or
                  asserted by either Party's end users against an Indemnified
                  Party arising from Services, Unbundled Network Elements or
                  Facilities. Each Party further agrees to release, indemnify,
                  defend, and hold harmless the Indemnified Party from all
                  losses, claims, demands, damages, expenses, suits, or other
                  actions, or any liability whatsoever, including, but not
                  limited to, costs and attorney's fees, suffered, made,
                  instituted, or asserted by any Third Party against an
                  Indemnified Party arising from or in any way related to actual
                  or alleged defamation, libel, slander, interference with or
                  misappropriation of proprietary or creative right, or any
                  other injury to any person or property arising out of content
                  transmitted by the Indemnified Party or such Party's end
                  users, or any other act or omission of the Indemnified Party
                  or such Party's end users.

         24.3     DISCLAIMER.  EXCEPT AS SPECIFICALLY PROVIDED TO THE CONTRARY 
                  IN THIS AGREEMENT, PROVIDER MAKES NO REPRESENTATIONS OR
                  WARRANTIES TO CUSTOMER CONCERNING THE SPECIFIC QUALITY OF ANY
                  SERVICES, UNBUNDLED NETWORK ELEMENTS OR FACILITIES PROVIDED
                  UNDER THIS

                                     III-7


<PAGE>   29


                  AGREEMENT. PROVIDER DISCLAIMS, WITHOUT LIMITATION, ANY
                  WARRANTY OR GUARANTEE OF MERCHANTABILITY OR FITNESS FOR A
                  PARTICULAR PURPOSE, ARISING FROM COURSE OF PERFORMANCE, COURSE
                  OF DEALING, OR FROM USAGES OF TRADE.

         24.4     Limitation of Liability. Each Party's liability, whether in
                  contract, tort or otherwise, shall be limited to direct
                  damages, which shall not exceed the monthly charges for the
                  Services, Unbundled Network Elements or facilities for the
                  month during which the claim of liability arose. Under no
                  circumstance shall either Party be responsible or liable for
                  indirect, incidental, or consequential damages, including, but
                  not limited to, economic loss or lost business or profits,
                  damages arising from the use or performance of equipment or
                  software, or the loss of use of software or equipment, or
                  accessories attached thereto, delay, error, or loss of data.
                  Should either Party provide advice, make recommendations, or
                  supply other analysis related to the Services, unbundled
                  network elements or facilities described in this Agreement,
                  this limitation of liability shall apply to provision of such
                  advice, recommendations, and analysis.

         24.5     Intellectual Property. Neither Party shall have any obligation
                  to defend, indemnify or hold harmless, or acquire any license
                  or right for the benefit of, or owe any other obligation or
                  have any liability to, the other based on or arising from any
                  claim, demand, or proceeding by any Third Party alleging or
                  asserting that the use of any circuit, apparatus, or system,
                  or the use of any software, or the performance of any service
                  or method, or the provision or use of any facilities by either
                  Party under this Agreement constitutes direct or contributory
                  infringement, or misuse or misappropriation of any patent,
                  copyright, trademark, trade secret, or any other proprietary
                  or intellectual property right of any Third Party.

25.      Multiple Counterparts. This Agreement may be executed in multiple
         counterparts, each of which shall be deemed an original, but all of
         which shall together constitute but one and the same document.

26.      No Offer. This Agreement will be effective only upon execution and
         delivery by both Parties and approval by the Commission in accordance
         with Section 252 of the Act.

27.      No Third Party Beneficiaries. Except as may be specifically set forth
         in this Agreement, this Agreement does not provide and shall not be
         construed to provide third parties with any remedy, claim, liability,
         reimbursement, cause of action, or other right or privilege.

28.      Notices.  Any notice to a Party required or permitted under this 
         Agreement shall be in writing and shall be deemed to have been received
         on the date of service if served personally, on the date receipt is
         acknowledged in writing by the recipient if delivered by regular U.S.
         mail, or on the date stated on the receipt if delivered by certified or
         registered mail or by a courier service that obtains a written receipt.
         Upon prior immediate oral agreement of the parties' designated
         recipients identified below, notice may also be provided by facsimile,
         internet or electronic messaging system, which shall be effective if
         sent before 5:00 p.m. on that day, or if sent after 5:00 p.m. it will
         be effective on the next Business Day following the date sent. Any
         notice shall be delivered using one of the alternatives mentioned in
         this section and shall be directed to the applicable address indicated
         below or such address as the Party to be notified has designated by
         giving notice in compliance with this section:


                                     III-8


<PAGE>   30



         If to GTE:       GTE Central
                          Attention:  State Director, External Affairs
                          1000 GTE Drive
                          Building "A"
                          Wentzville, Missouri 63385
                          Facsimile number:  (616) 727-1686
                          Internet Address:

         If to DTI:       Digital Teleport, Inc.
                          Attention:  J.W. Sheehy, Vice President, I.C. Support
                          11111 Dorsett Road
                          St. Louis, Missouri 63043
                          Facsimile number:  (314) 253-6699
                          Internet Address:

29.      Protection.

         29.1     Impairment of Service. The characteristics and methods of
                  operation of any circuits, facilities or equipment of either
                  Party connected with the services, facilities or equipment of
                  the other Party pursuant to this Agreement shall not interfere
                  with or impair service over any facilities of the other Party,
                  its affiliated companies, or its connecting and concurring
                  carriers involved in its services, cause damage to their
                  plant, violate any applicable law or regulation regarding the
                  invasion of privacy of any communications carried over the
                  Party's facilities or create hazards to the employees of
                  either Party or to the public (each hereinafter referred to as
                  an "Impairment of Service").

         29.2     Resolution. If either Party causes an Impairment in Service,
                  the Party whose network or service is being impaired (the
                  "Impaired Party") shall promptly notify the Party causing the
                  Impairment of Service (the "Impairing Party") of the nature
                  and location of the problem and that, unless promptly
                  rectified, a temporary discontinuance of the use of any
                  circuit, facility or equipment may be required. The Impairing
                  Party and the Impaired Party agree to work together to attempt
                  to promptly resolve the Impairment of Service. If the
                  Impairing Party is unable to promptly remedy the Impairment of
                  Service, then the Impaired Party may at its option temporarily
                  discontinue the use of the affected circuit, facility or
                  equipment.

30.      Publicity. Any news release, public announcement, advertising, or any
         form of publicity pertaining to this Agreement, provision of Services,
         Unbundled Network Elements or Facilities pursuant to it, or association
         of the Parties with respect to provision of the services described in
         this Agreement shall be subject to prior written approval of both GTE
         and DTI.

31.      Regulatory Agency Control. This Agreement shall at all times be subject
         to changes, modifications, orders, and rulings by the Federal
         Communications Commission and/or the applicable state regulatory
         commission to the extent the substance of this Agreement is or becomes
         subject to the jurisdiction of such agency.

32.      Changes in Legal Requirements. GTE and DTI further agree that the terms
         and conditions of this Agreement were composed in order to effectuate
         the legal requirements in effect at the time the Agreement was
         produced. Any modifications to those requirements will be deemed to
         automatically supersede any terms and conditions of this Agreement.

33.      Effective Date. If this Agreement or changes or modifications thereto
         are subject to approval of a regulatory agency, the "effective date" of
         this Agreement for such purposes will be ten (10) Business Days after
         such approval or in the event this Agreement is developed in whole or
         in part through arbitration, sixty (60) Business Days after such
         approval. Such date (i.e., ten (10) or, if

                                     III-9


<PAGE>   31


         arbitrated, sixty (60) Business Days after the approval) shall become
         the "effective date" of this Agreement for all purposes.

34.      Regulatory Matters. Each Party shall be responsible for obtaining and
         keeping in effect all their own FCC, state regulatory commission,
         franchise authority and other regulatory approvals that may be required
         in connection with the performance of its obligations under this
         Agreement.

35.      Rule of Construction. No rule of construction requiring interpretation
         against the drafting party hereof shall apply in the interpretation of
         this Agreement.

36.      Section References. Except as otherwise specified, references within an
         Article of this Agreement to a Section refer to Sections within that
         same Article.

37.      Service Standards.

         37.1     The Parties shall meet applicable quality of local service
                  standards imposed by the Commission and will provide a level
                  of services to each other under this Agreement in compliance
                  with the nondiscrimination requirements of the Act.

         37.2     GTE and DTI agree to implement the performance measures 
                  defined in Appendix A.

         37.3     The Parties will alert each other to any network events that
                  can result or have resulted in service interruption, blocked
                  calls, and/or changes in network performance.

38.      Severability.  If any provision of this Agreement is held by a court 
         or regulatory agency of competent jurisdiction to be unenforceable, the
         rest of the Agreement shall remain in full force and effect and shall
         not be affected unless removal of that provision results, in the
         opinion of either Party, in a material change to this Agreement. If a
         material change as described in this paragraph occurs as a result of
         action by a court or regulatory agency, the Parties shall negotiate in
         good faith for replacement language. If replacement language cannot be
         agreed upon within a reasonable period, either Party may terminate this
         Agreement without penalty or liability for such termination upon
         written notice to the other Party.

39.      Subcontractors. Provider may enter into subcontracts with third parties
         or affiliates for the performance of any of Provider's duties or
         obligations under this Agreement.

40.      Subsequent Law. The terms and conditions of this Agreement shall be
         subject to any and all applicable laws, rules, or regulations that
         subsequently may be prescribed by any federal, state or local
         governmental authority. To the extent required by any such subsequently
         prescribed law, rule, or regulation, the Parties agree to modify, in
         writing, the affected term(s) and condition(s) of this Agreement to
         bring them into compliance with such law, rule, or regulation.

41.      Taxes.  Any state or local excise, sales, or use taxes (excluding any 
         taxes levied on income) resulting from the performance of this
         Agreement shall be borne by the Party upon which the obligation for
         payment is imposed under applicable law, even if the obligation to
         collect and remit such taxes is placed upon the other Party. The
         collecting Party shall charge and collect from the obligated Party, and
         the obligated Party agrees to pay to the collecting Party, all
         applicable taxes, except to the extent that the obligated Party
         notifies the collecting Party and provides to the collecting Party
         appropriate documentation as GTE requires that qualifies the obligated
         Party for a full or partial exemption. Any such taxes shall be shown as
         separate items on applicable billing documents between the Parties. The
         obligated Party may contest the same in good faith, at its own expense,
         and shall be entitled to the benefit of any refund or recovery,
         provided that such Party shall not permit any lien to exist on any
         asset of the other Party by reason of the contest. The collecting Party
         shall cooperate in any such contest by the other Party. The other Party
         will

                                     III-10


<PAGE>   32


         indemnify the collecting Party from any sales or use taxes that may be
         subsequently levied on payments by the other Party by the collecting
         Party.

         41.1     Tax - A charge which is statutorily imposed by the state or
                  local jurisdiction and is either (a) imposed on the seller
                  with the seller having the right or responsibility to pass the
                  charge(s) on to the purchaser and the seller is responsible
                  for remitting the charge(s) to the state or local jurisdiction
                  or (b) imposed on the purchaser with the seller having an
                  obligation to collect the charge(s) from the purchaser and
                  remit the charge(s) to the state or local jurisdiction.

         Taxes shall include but not be limited to: federal excise tax,
         state/local sales and use tax, state/local utility user tax,
         state/local telecommunication excise tax, state/local gross receipts
         tax, and local school taxes. Taxes shall not include income,
         income-like, gross receipts on the revenue of a provider, or property
         taxes. Taxes shall not include payroll withholding taxes unless
         specifically required by statute or ordinance.

         41.2     Fees/Regulatory Surcharges - A charge imposed by a regulatory
                  authority, other agency, or resulting from a contractual
                  obligation, in which the seller is responsible or required to
                  collect the fee/surcharge from the purchaser and the seller is
                  responsible for remitting the charge to the regulatory
                  authority, other agency, or contracting party.

         Fees/Regulatory Surcharges shall include but not be limited to
         E911/911, E311/311, franchise fees, Lifeline, hearing impaired, and
         Commission surcharges.

42.      Trademarks and Trade Names. Except as specifically set out in this
         Agreement, nothing in this Agreement shall grant, suggest, or imply any
         authority for one Party to use the name, trademarks, service marks, or
         trade names of the other for any purpose whatsoever.

43.      Waiver. The failure of either Party to insist upon the performance of
         any provision of this Agreement, or to exercise any right or privilege
         granted to it under this Agreement, shall not be construed as a waiver
         of such provision or any provisions of this Agreement, and the same
         shall continue in full force and effect.

44.      Environmental Responsibility.

         44.1     GTE and DTI agree to comply with applicable federal, state and
                  local environmental and safety laws and regulations including
                  U.S. Environmental Protection Agency (EPA) regulations issued
                  under the Clean Air Act, Clean Water Act, Resource
                  Conservation and Recovery Act, Comprehensive Environmental
                  Response, Compensation and Liability Act, Superfund Amendments
                  and Reauthorization Act and the Toxic Substances Control Act
                  and OSHA regulations issued under the Occupational Safety and
                  Health Act of 1970. Each Party has the responsibility to
                  notify the other if Compliance inspections occur and/or
                  citations are issued that impact any aspect of this Agreement
                  such as occurring on a LEC Facility or involving DTI potential
                  employee exposure.

         44.2     GTE and DTI shall provide notice of known and recognized
                  physical hazards or hazardous chemicals that must include
                  providing Material Safety Data Sheets (MSDSs) for materials
                  existing on site or brought on site to the Facility. Each
                  Party is required to provide specific notice for potential
                  imminent danger conditions which could include, but is not
                  limited to, a defective utility pole or significant petroleum
                  contamination in a manhole.

         44.3     GTE will make available additional environmental control or 
                  safety procedures for DTI to review and follow when working at
                  a GTE Facility. Providing these procedures, beyond government
                  regulatory Compliance requirements, is the decision of GTE.
                  These

                                     III-11


<PAGE>   33


                  practices/procedures will represent the regular work practices
                  required to be followed by the employees and contractors of
                  GTE for safety and environmental protection.

         44.4     Any materials brought, used or remaining at the Facility by
                  DTI are owned by DTI. DTI will indemnify GTE for these
                  materials. No substantial new safety or environmental hazards
                  can be created or new hazardous materials can be used at a GTE
                  Facility. DTI must demonstrate adequate emergency response
                  capabilities for its materials used or remaining at the GTE
                  Facility.

         44.5     When Third Party contamination is discovered at a GTE
                  Facility, the Party uncovering the condition must notify the
                  proper safety or environmental authority, if required under
                  applicable laws or regulations. DTI must also notify GTE of
                  Third Party contamination it discovers at GTE facilities. The
                  cost causer (requiring access) will become the generator, as
                  owner or operator, of any waste materials such as petroleum
                  contaminated water, sewage or manhole sediment.
                  Notwithstanding Section 24 and Section 44.9 of this Article
                  III, the cost causer (requiring access) shall indemnify the
                  other Party hereunder.

         44.6     DTI should obtain and use its own environmental permits, if
                  necessary. If GTE's permit or EPA identification number must
                  be used, DTI must comply with all of GTE's environmental
                  processes including environmental "best management practices
                  (BMP)" and/or selection of disposition vendors and disposal
                  sites.

         44.7     DTI visitors must comply with GTE security, fire safety,
                  safety, environmental and building practices/codes including
                  equivalent employee training when working in GTE facilities.

         44.8     GTE and DTI shall coordinate plans or information required to
                  be submitted to government agencies, such as emergency
                  response plans and community reporting. If fees are associated
                  with filing, GTE and DTI must develop a cost sharing
                  procedure.

         44.9     Notwithstanding Section 23, with respect to environmental
                  responsibility under this Section 44, GTE and DTI shall
                  indemnify, defend and hold harmless the other party from and
                  against any claims (including, without limitation, Third Party
                  claims for personal injury or real or personal property
                  damage), judgments, damages (including direct and indirect
                  damage, and punitive damages), penalties, fines, forfeitures,
                  cost, liabilities, interest and losses proximately caused by
                  the indemnifying Party's negligent or willful misconduct
                  regardless of form, or in connection with the violation or
                  alleged violation of any applicable requirement with respect
                  to the presence or alleged presence of contamination arising
                  out of the indemnifying party's acts or omissions concerning
                  its operations at the Facility.

         44.10    Activities impacting safety or the environment of a Right of
                  Way must be harmonized with the specific agreement and the
                  relationship between GTE and the private land owner. This
                  could include limitations on equipment access due to
                  environmental conditions (e.g., wetland area with equipment
                  restrictions).

45.      TBD Prices.  Numerous provisions in this Agreement and its Attachments 
         refer to pricing principles. If a provision references prices in an
         Attachment and there are no corresponding prices in such Attachment,
         such price shall be considered "To Be Determined" (TBD). With respect
         to all TBD prices, prior to DTI ordering any such TBD item, the Parties
         shall meet and confer to establish a price. If the Parties are unable
         to reach agreement on a price for such item, an interim price shall be
         set for such item that is equal to the price for the nearest analogous
         item for which a price has been established (for example, if there is
         not an established price for a nonrecurring charge (NRC) for a specific
         network element, the Parties would use the NRC for the most analogous
         retail service for which there is an established price). Any interim
         prices so set shall be subject to modification by any subsequent
         decision of the Commission. If an interim price is different from the
         rate subsequently established by the Commission, any underpayment

                                     III-12


<PAGE>   34


         shall be paid by DTI to GTE, and any overpayment shall be refunded by
         GTE to DTI, within 45 Business Days after the establishment of the
         price by the Commission.

46.      Amendment of Certain Rates, Terms and Conditions. The Parties agree as
         follows with respect to modification of the rates, terms and conditions
         initially provided for herein:

         The rates, terms and conditions that are specified in Appendix 46A (the
         "GTE Terms") may be replaced by the rates, terms and conditions from
         the GTE/OtherCLEC Interconnection, Resale and Unbundling Agreement (the
         "OtherCLEC Agreement"), respectively, that are specified in Appendix
         46B (the "OtherCLEC Terms") if and when the OtherCLEC Agreement becomes
         effective after approval by order of the Commission in Case No.____.The
         rates, terms and conditions that are specified in Appendix 46B (the
         OtherCLEC Terms) shall not take effect for purposes of this Agreement
         until thirty (30) days following GTE's receipt of written notice of
         DTI's election to replace the specified GTE Terms with the specified
         OtherCLEC Terms, which notice may be given no earlier than the date the
         OtherCLEC Agreement is approved by the Commission and effective. GTE
         and DTI agree that if the OtherCLEC Terms are deemed to be unlawful, or
         are stayed, enjoined or otherwise modified, in whole or in part, by a
         court or commission of competent jurisdiction, then this Agreement
         shall be deemed to have been amended accordingly, by modification of
         the OtherCLEC Terms or, as appropriate, the substitution of GTE Terms
         for all stayed or enjoined OtherCLEC Terms, and such amendment shall be
         effective retroactive to the Effective Date of the OtherCLEC Terms.

         GTE and DTI further agree that the terms and conditions of this
         Agreement reflect certain requirements of the FCC's First Report and
         Order in CC Docket No. 96-98. The terms and conditions of this
         Agreement shall be subject to any and all actions by any court or other
         governmental authority that invalidate, stay, vacate or otherwise
         modify the FCC's First Report and Order, in whole or in part
         ("subsequent action"). To the extent warranted by any such subsequent
         action, the Parties agree that this Agreement shall be deemed to have
         been modified accordingly as in the first paragraph of this Section 46.
         The Parties agree to immediately apply any effected terms and
         conditions, including any in other sections and articles of this
         Agreement consistent with such subsequent action, and within a
         reasonable time incorporate such modified terms and conditions in
         writing into this Agreement. If the OtherCLEC Terms are affected by
         such subsequent action and GTE determines they cannot be consistently
         applied therewith, the GTE Terms shall apply. DTI acknowledges that GTE
         may seek to enforce such subsequent action before a commission or court
         of competent jurisdiction. GTE does not waive any position regarding
         the illegality or inappropriateness of the FCC's First Report and
         Order.

         The rates, terms and conditions (including rates which may be
         applicable under true-up) specified in both the GTE Terms and the
         OtherCLEC Terms are further subject to amendment, retroactive to the
         Effective Date of the Agreement, to provide for charges or rate
         adjustments resulting from future Commission or other proceedings,
         including but not limited to any generic proceeding to determine GTE's
         unrecovered costs (e.g., historic costs, contribution, undepreciated
         reserve deficiency, or similar unrecovered GTE costs (including GTE's
         end user surcharge)), the establishment of a competitively neutral
         universal service system, or any appeal or other litigation.

         If the Commission (or any other commission or federal or state court)
         in reviewing this Agreement pursuant to applicable state or federal
         laws, including Section 252(e) of the Telecommunications Act of 1996,
         deletes or modifies in any way this Section 46, then the Parties agree
         that they will reopen negotiations within ten (10) days after receipt
         of the final decision making such deletion or modification in order to
         attempt to craft the new provision that will provide substantially the
         same protections to GTE and DTI as this Section 46. If the Parties
         cannot reach agreement on such a provision within twenty (20) calendar
         days thereafter, the Parties agree that this entire Agreement is void
         and will not become effective, and DTI agrees to withdraw this
         Agreement from consideration by the Commission (or any other commission
         or federal or state court). In such

                                     III-13


<PAGE>   35


         event, each Party shall have 25 days following the close of the 20-day
         negotiation period within which to file a petition for arbitration
         before the Commission under Section 252(e) of the Telecommunications
         Act of 1996 of the issues that remain in dispute under this paragra





                                     III-14


<PAGE>   36



                                   ARTICLE IV
                     GENERAL RULES GOVERNING RESOLD SERVICES
                             AND UNBUNDLED ELEMENTS

1.       General. General regulations, terms and conditions governing rate
         applications, technical parameters, service availability, definitions
         and feature interactions, as described in the appropriate GTE
         intrastate local, toll and access tariffs, apply to retail services
         made available by GTE to DTI for resale and unbundled network elements
         provided by GTE to DTI, when appropriate, unless otherwise specified in
         this Agreement. As applied to services or network elements offered
         under this Agreement, the term "Customer" contained in the GTE Retail
         Tariff shall be deemed to mean "DTI" as defined in this Agreement.

2.       Liability of GTE.

         2.1      Inapplicability of Tariff Liability. GTE's general liability,
                  as described in the GTE Retail Tariff, does not extend to
                  DTI's customers or any other Third Party. Liability of GTE to
                  DTI resulting from any and all causes arising out of services,
                  facilities, network elements or any other items relating to
                  this Agreement shall be governed by the liability provisions
                  contained in this Agreement and no other liability whatsoever
                  shall attach to GTE. GTE shall be liable for the individual
                  services, facilities or elements that it separately provides
                  to DTI and shall not be liable for the integration of
                  components combined by DTI.

         2.2      DTI Tariffs or Contracts. DTI shall, in its tariffs or other
                  contracts for services provided to its end users using
                  services, facilities or network elements obtained from GTE,
                  provide that in no case shall GTE be liable to DTI's end users
                  or any third parties for any indirect, special or
                  consequential damages, including, but not limited to, economic
                  loss or lost business or profits, whether foreseeable or not,
                  and regardless of notification by DTI of the possibility of
                  such damages and DTI shall indemnify and hold GTE harmless
                  from any and all claims, demands, causes of action and
                  liabilities based on any reason whatsoever from its customers
                  as provided in this Agreement. Nothing in this Agreement shall
                  be deemed to create a third party beneficiary relationship
                  with DTI's end users.

         2.3      No Liability for Errors. GTE is not liable for mistakes that
                  appear in GTE's listings, 911 and other information databases,
                  or for incorrect referrals of end users to DTI for any ongoing
                  DTI service, sales or repair inquiries, and with respect to
                  such mistakes or incorrect referrals, DTI shall indemnify and
                  hold GTE harmless from any and all claims, demands, causes of
                  action and liabilities whatsoever, including costs, expenses
                  and reasonable attorney's fees incurred on account thereof, by
                  third parties, including DTI's end users or employees. For
                  purposes of this Section 2.3, mistakes and incorrect referrals
                  shall not include matters arising out of the willful
                  misconduct of GTE or its employees or agents.

3.       Unauthorized Changes.

         3.1      Procedures. If DTI submits an order for resold services or
                  unbundled elements under this Agreement in order to provide
                  service to an end user that at the time the order is submitted
                  is obtaining its local services from GTE or another LEC using
                  GTE resold services or unbundled elements, and the end user
                  notifies GTE that the end user did not authorize DTI to
                  provide local exchange services to the end user, DTI must
                  provide GTE with written documentation of authorization from
                  that end user within thirty (30) Business Days of notification
                  by GTE. If DTI cannot provide written documentation of
                  authorization within such time frame, DTI must within three
                  (3) Business Days thereafter:

         (a)      notify GTE to change the end user back to the LEC providing
                  service to the end user before the change to DTI was made; and


                                      IV-1


<PAGE>   37


         (b)      provide any end user information and billing records DTI has
                  obtained relating to the end user to the LEC previously
                  serving the end user; and

         (c)      notify the end user and GTE that the change back to the 
                  previous LEC has been made.

         Furthermore, GTE will bill DTI fifty dollars ($50.00) per affected line
         to compensate GTE for switching the end user back to the original LEC.

         3.2      Option to Restrict Changes Without Evidence of Authorization.
                  DTI's or GTE's end users may request GTE to permit changes of
                  their provider of local exchange services only upon end user
                  written notification to GTE that the end user wishes to change
                  the end user's provider of local exchange services. In such a
                  situation, GTE will not change an end user's provider of local
                  exchange services without such written notification.

4.       Impact of Payment of Charges on Service.  DTI is solely responsible 
         for the payment of all charges for all services, facilities and
         elements furnished under this Agreement, including, but not limited to,
         calls originated or accepted at its or its end users' service
         locations. If DTI fails to pay when due any and all charges billed to
         DTI under this Agreement, including any late payment charges
         (collectively, "Unpaid Charges"), and any or all such charges remain
         unpaid more than forty-five (45) Business Days after the due date of
         such Unpaid Charges excepting previously disputed charges for which DTI
         may withhold payment, GTE shall notify DTI in writing that it must pay
         all Unpaid Charges to GTE within seven (7) Business Days. If DTI
         disputes the billed charges, it shall, within said seven (7) day
         period, inform GTE in writing of which portion of the Unpaid Charges it
         disputes, including the specific details and reasons for the dispute,
         unless such reasons have been previously provided, and shall
         immediately pay to GTE all undisputed charges. If DTI and GTE are
         unable, within thirty (30) Business Days thereafter, to resolve issues
         related to the disputed charges, then either DTI or GTE may file a
         request for arbitration under Article III of this Agreement to resolve
         those issues. Upon resolution of any dispute hereunder, if DTI owes
         payment it shall make such payment to GTE with any late payment charge
         under Article III, Section 7.2, from the original payment due date. If
         DTI owes no payment, but has previously paid GTE such disputed payment,
         then GTE shall credit such payment including any late payment charges.
         If DTI fails to pay any undisputed Unpaid Charges, DTI shall, at its
         sole expense, within five (5) Business Days notify its end users that
         their service may be disconnected for DTI's failure to pay Unpaid
         Charges, and that its end users must select a new provider of local
         exchange services. If DTI fails to provide such notification or any of
         DTI's end users fail to select a new provider of services within the
         applicable time period, GTE will provide local exchange services to
         DTI's end users under GTE's applicable end user tariff at the then
         current charges for the services being provided. In this circumstance,
         otherwise applicable service establishment charges will not apply to
         DTI's end user, but will be assessed to DTI. GTE may discontinue
         service to DTI upon failure to pay undisputed charges as provided in
         this Section 4, and shall have no liability to DTI or DTI's end users
         in the event of such disconnection.

5.       Unlawful Use of Service.  Services, facilities or unbundled elements 
         provided by GTE pursuant to this Agreement shall not be used by DTI or
         its end users for any purpose in violation of law. DTI, and not GTE,
         shall be responsible to ensure that DTI and its end users use of
         services, facilities or unbundled elements provided hereunder comply at
         all times with all applicable laws. GTE may refuse to furnish service
         to DTI or disconnect particular services, facilities or unbundled
         elements provided under this Agreement to DTI or, as appropriate, DTI's
         end user when (i) an order is issued by a court of competent
         jurisdiction finding that probable cause exists to believe that the use
         made or to be made of the service, facilities or unbundled elements is
         prohibited by law or (ii) GTE is notified in writing by a law
         enforcement agency acting within its jurisdiction that any facility
         furnished by GTE is being used or will be used for the purpose of
         transmitting or receiving gambling information in interstate or foreign
         commerce in violation of law. Termination of service shall take place
         after reasonable notice is provided to DTI, or as ordered by the court.
         If facilities have been physically disconnected by law enforcement
         officials at the premises where

                                      IV-2


<PAGE>   38


         located, and if there is not presented to GTE the written finding of a
         court, then upon request of DTI and agreement to pay restoral of
         service charges and other applicable service charges, GTE shall
         promptly restore such service.

6.       Timing of Messages. With respect to GTE resold measured rate local
         service(s), chargeable time begins when a connection is established
         between the calling station and the called station. Chargeable time
         ends when the calling station "hangs up," thereby releasing the network
         connection. If the called station "hangs up" but the calling station
         does not, chargeable time ends when the network connection is released
         by automatic timing equipment in the network. Timing of messages
         applicable to GTE's Port and Local Switching element (usage sensitive
         services) will be recorded based on originating and terminating access.

7.       Procedures For Preordering, Ordering, Provisioning, Etc. Certain
         procedures for preordering, ordering, provisioning, maintenance and
         billing and electronic interfaces for many of these functions are
         described in Appendix I. All costs and expenses for any new or modified
         electronic interfaces DTI requires that GTE determines are technically
         feasible and GTE agrees to develop will be paid by DTI pursuant to
         Appendix I. The schedule for implementation of any new or modified
         electronic interfaces will be developed by GTE according to industry
         standards and will be based upon the amount of work needed to design,
         test and implement the new or modified interface.

8.       Customer Contacts.  Except as otherwise provided in this Agreement or 
         as agreed to in a separate writing by DTI, DTI shall provide the
         exclusive interface with DTI's end user customers in connection with
         the marketing or offering of DTI services. Except as otherwise provided
         in this Agreement, in those instances in which GTE personnel are
         required pursuant to this Agreement to interface directly with DTI's
         end users, such personnel shall not identify themselves as representing
         GTE. All forms, business cards or other business materials furnished by
         GTE to DTI end users shall bear no corporate name, logo, trademark or
         trade name other than DTI's. In no event shall GTE personnel acting on
         behalf of DTI pursuant to this Agreement provide information to DTI end
         users about GTE products or services.



                                      IV-3


<PAGE>   39




                                    ARTICLE V
            INTERCONNECTION AND TRANSPORT AND TERMINATION OF TRAFFIC

1.       Services Covered by This Article.

         1.1      Types of Services. This Article governs the provision of
                  internetwork facilities (i.e., physical interconnection
                  services and facilities), meet point billing by GTE to DTI or
                  by DTI to GTE and the transport and termination and billing of
                  Local, IntraLATA Toll, optional EAS traffic and jointly
                  provided Interexchange Carrier Access between GTE and DTI. The
                  services and facilities described in this Article shall be
                  referred to in this Article V as the "Services."

         1.2      Service Locations for Interconnection Services and Facilities.
                  Appendix B, Service Matrix, attached to this Agreement and
                  made a part hereof, sets forth the Services and each location
                  in the State where a Service shall be provided (the "Service
                  Locations") and the Interconnection Point ("IP") for such
                  Services.

         1.3      Additional Services or Service Locations. If, during the term
                  of this Agreement, the parties determine that additional
                  services are needed in the State, or existing Services will be
                  offered in new locations in the State, the Parties shall
                  execute an amendment to this Agreement substantially in the
                  form of Appendix C attached to this Agreement and made a part
                  hereof, incorporating the additional locations and/or any
                  additional terms necessary for the additional services. Upon
                  the effective date of the amendment, and continuing through
                  the remaining term of this Agreement, the new services shall
                  be deemed part of the Services provided pursuant to this
                  Article and/or the new locations shall be deemed part of the
                  Service Locations.

2.       Billing and Rates.

         2.1      Rates and Charges. Customer agrees to pay to Provider the
                  rates and charges for the Services set forth in the applicable
                  appendices to this Agreement. GTE's rates and charges are set
                  forth in Appendix D attached to this Agreement and made a part
                  hereof. DTI's separate rates and charges are also set forth in
                  Appendix D attached hereto and made a part hereof.

         2.2      Billing. Provider shall render to Customer a bill for
                  interconnection services on a current basis. Charges for
                  physical facilities and other nonusage sensitive charges shall
                  be billed in advance, except for charges and credits
                  associated with the initial or final bills. Usage sensitive
                  charges, such as charges for termination of Local Traffic,
                  shall be billed in arrears. DTI is required to order trunks
                  pursuant to Section 4.3.3 of this Article. Charges for traffic
                  that has been routed over a jurisdictionally inappropriate
                  trunk group (e.g., local traffic carried over trunks used for
                  Switched Access Traffic) may be adjusted to reflect the
                  appropriate compensation arrangement and may be handled as a
                  post-billing adjustment to bills rendered. Additional matters
                  relating to billing are included in Appendix I attached to
                  this Agreement and made a part hereof.

3.       Transport and Termination of Traffic.

         3.1      Traffic to be Exchanged. The Parties shall reciprocally
                  terminate Local, IntraLATA Toll, optional EAS and jointly
                  provided Interexchange Carrier Traffic originating on each
                  other's networks utilizing either Direct or Indirect Network
                  Interconnections as provided in Section 4 or Section 5 herein.
                  To this end, the Parties agree that there will be
                  interoperability between their networks. The Parties agree to
                  exchange traffic associated with Third-Party LECs, CLECs and
                  Wireless Service Providers pursuant to the compensation
                  arrangement specified in Section 3.3 herein. Only traffic
                  originated by or terminating to the Parties' end

                                      V-1


<PAGE>   40


                  user customers is to be exchanged. In addition, the Parties
                  will notify each other of any anticipated change in traffic to
                  be exchanged (e.g., traffic type, volume).

         3.2      Compensation For Exchange Of Traffic.

                  3.2.1    Mutual Compensation.  The Parties shall compensate 
                           each other for the exchange of Local Traffic in
                           accordance with Section 3.2.2 of this Article. The
                           Parties will develop an initial factor representative
                           of the share of traffic exempt from local
                           compensation. This factor will be updated quarterly
                           in like manner or as the Parties otherwise agree.
                           Once the traffic that is exempt from local
                           compensation can be measured, the actual exempt
                           traffic will be used rather than the above factor.
                           Charges for the transport and termination of
                           intraLATA toll and interexchange traffic shall be in
                           accordance with the Parties' respective intrastate or
                           interstate access tariffs, as appropriate.

                  3.2.2    Bill-and-Keep.  The Parties shall assume that Local 
                           Traffic is roughly balanced between the parties
                           unless traffic studies indicate otherwise.
                           Accordingly, the Parties agree to use a Bill-and-Keep
                           Arrangement with respect to termination of Local
                           Traffic only. Either Party may request that a traffic
                           study be performed no more frequently than once a
                           quarter. Should such traffic study indicate, in the
                           aggregate, that either Party is terminating more than
                           60 percent of the Parties' total terminated minutes
                           for Local Traffic, either Party may notify the other
                           that mutual compensation will commence pursuant to
                           the rates set forth in Appendix D of this Agreement
                           and following such notice it shall begin
                           and continue for the duration of the Term of this
                           Agreement unless otherwise agreed. To account for ISP
                           traffic, the Parties will negotiate an initial
                           factor(s) representative of the proportionate share
                           of traffic exempt from local compensation. This
                           factor will be updated quarterly in a like manner or
                           as the Parties otherwise agree. Once the traffic that
                           is exempt from local compensation can be measured,
                           the actual exempt traffic will be used rather than
                           the above factor. Nothing in this Section 3.2.2 shall
                           be interpreted to (i) change compensation set forth
                           in this Agreement for traffic or services other than
                           Local Traffic, including but not limited to
                           internetwork facilities, access traffic or wireless
                           traffic, or (ii) allow either Party to aggregate
                           traffic other than Local Traffic for the purpose of
                           compensation under the Bill-and-Keep Arrangement
                           described in this Section 3.2.2, except as set forth
                           in Section 3.1 above.

                  3.2.3    Sharing of Access Charges on Calls to Ported 
                           Numbers.   Until permanent number portability is
                           implemented, the Parties agree that switched access
                           termination to a ported number will be billed by the
                           party providing interim number portability and that
                           the party billing the switched access will share the
                           switched access revenue with the other party. After
                           permanent number portability is implemented, the
                           Parties agree to renegotiate sharing of access
                           charges to ported numbers in accordance with
                           permanent number portability requirements. In lieu
                           of actual measurements of minutes and/exchange of
                           billing records for this traffic the Parties agree
                           that the Party providing the ported number will pay
                           the other Party the rate per line/per month as       
                           specified in Appendix E. 
        
                           (a)      The number of lines/talk paths per ported 
                                    number that are subject to compensation will
                                    be determined at the time the end user
                                    customer's local service is changed from one
                                    party to the other. The number of lines per
                                    number eligible for the shared revenue
                                    arrangement described in this section will
                                    be limited to the number of lines in service
                                    on the date of conversion plus a 10% growth
                                    margin. After conversion the number of lines
                                    per number available for compensation can
                                    only be increased by mutual consent of the
                                    parties.


                                      V-2


<PAGE>   41


                           (b)      The Parties agree that the compensation rate
                                    in paragraph 3.3.3 may change as a result of
                                    changes in access rates, traffic volume or
                                    for other reasons and agree to renegotiate
                                    the rate if a significant event occurs. At a
                                    minimum, the parties agree to reevaluate the
                                    rate on an annual basis.

                           (c)      The Parties agree that terminating switched
                                    access calls ported via interim number
                                    portability may appear to the receiving
                                    party to be a local call and that the
                                    implementation of reciprocal compensation
                                    for terminating local calls may result in
                                    overcompensation for ported switched access
                                    calls. Therefore, the Parties agree to
                                    renegotiate the terminating shared access
                                    compensation rate if reciprocal compensation
                                    for local calls is implemented.

         3.3      Tandem Switching Traffic. The Parties will provide tandem
                  switching for traffic between the Parties' end offices
                  subtending each other's access tandem, as well as for traffic
                  between either Party's end users and any Third Party which is
                  interconnected to the other Party's access tandems as follows:

                  3.3.1    The originating Party will compensate the tandem
                           Party for each minute of originated tandem switched
                           traffic which terminates to Third Party (e.g., other
                           CLEC, ILEC, or wireless service provider). The
                           applicable rate for this charge is identified in
                           Appendix D.

                  3.3.2    The originating Party also assumes responsibility for
                           compensation to the company which terminates the
                           call.

         3.4      Inter-Tandem Switching. The Parties will only use inter-tandem
                  switching for the transport and termination of local/EAS or
                  intraLATA toll traffic originating on each other's network at
                  and after such time as either (I) DTI has agreed to and fully
                  implemented an existing intraLATA toll compensation mechanism
                  such as IntraLATA Terminating Access Compensation (ITAC) or a
                  functional equivalent thereof or (ii) generally accepted
                  industry signaling standards and AMA record standards support
                  the recognition of multiple tandem switching events.

4.       Direct Network Interconnection.

         4.1      Network Interconnection Architecture. DTI may interconnect
                  with GTE at any of the minimum technically feasible points
                  required by the FCC. Interconnection at additional points will
                  be reviewed on an individual case basis. Where the Parties
                  mutually agree following a Bona Fide Request to directly
                  interconnect their respective networks, interconnection will
                  be as specified in the following subsections. The "IPs" shall
                  be set forth in Appendix B attached to this Agreement and made
                  a part hereof. Based on the configuration, the installation
                  timeline will vary considerably, however, GTE will work with
                  DTI in all circumstances to install "IPs" within 120 calendar
                  days absent extenuating circumstances. Internetwork connection
                  and protocol must be based on industry standards developed
                  consistent with Section 256 of the Telecommunications Act of
                  1996.

                  4.1.1    Subject to mutual agreement, the Parties may use the
                           following types of network facility interconnection,
                           using such interface media as are (I) appropriate to
                           support the type of interconnection requested and
                           (ii) available at the facility at which
                           interconnection is requested. For each "IP" set forth
                           in Appendix B, the Parties shall specify the type of
                           interconnection used at that "IP."

                                      V-3


<PAGE>   42


                           (a)      A Mid-Span Fiber Meet within an existing GTE
                                    exchange area whereby the Parties mutually
                                    agree to jointly plan and engineer their
                                    facility "IP" at a designated manhole or
                                    junction location. The "IP" is the
                                    demarcation between ownership of the fiber
                                    transmission facility. Each party is
                                    individually responsible for its incurred
                                    costs in establishing this arrangement.

                           (b)      A Virtual or Physical EIS arrangement at a
                                    GTE wire center subject to the rates, terms,
                                    and conditions contained in GTE's applicable
                                    tariffs.

                           (c)      A Special Access arrangement and/or Switched
                                    Transport terminating at a GTE wire center
                                    subject to the rates, terms, and conditions
                                    contained in GTE's applicable tariffs. These
                                    facilities will meet the standards set forth
                                    in such tariffs.

                  4.1.2    Virtual and Physical EIS arrangements are governed by
                           appropriate GTE tariffs, except as provided in
                           Article IX, Section 1.3.

                  4.1.3    The Parties will mutually designate at least one POI
                           on GTE's network within each GTE local calling area
                           for the routing of Local Traffic. Recording and
                           billing of traffic routed over these facilities shall
                           be as provided in Section 3.4 of this Article.

         4.2      Compensation. The Parties agree to the following compensation
                  for internetwork facilities, depending on facility type.

                  4.2.1    Mid-Span Fiber Meet:  GTE will charge special access 
                           (flat rated) transport from the applicable intrastate
                           access tariff and will rate charges between the "IP"
                           and GTE's interconnection switch. Charges will be
                           reduced to reflect the proportionate share of the
                           facility that is used for transport of traffic
                           originated by GTE. DTI will charge flat rated
                           transport to GTE for DTI facilities used by GTE at
                           their tariffed rates or as mutually agreed, not to
                           exceed GTE rates. DTI will apply charges based on the
                           lesser of; (i) the airline mileage from the "IP" to
                           the DTI switch; or (ii) the airline mileage from the
                           GTE switch to the serving area boundary.

                  4.2.2    Collocation: GTE will charge Virtual or Physical EIS
                           rates from the applicable GTE tariff. DTI will charge
                           GTE flat rated transport at their tariffed rates or
                           as mutually agreed, not to exceed GTE rates, to
                           reflect the proportionate share of the facility that
                           is used for transport of traffic originated by GTE.
                           DTI will apply charges based on the lesser of; (l)
                           the airline mileage from the "IP" to the DTI switch;
                           or (ii) two (2) times the airline mileage from the
                           GTE switch to the serving area boundary.

                  4.2.3    Special Access and/or Switched Access: GTE will
                           charge special access and/or switched access rates
                           from the applicable GTE intrastate access tariff.
                           Charges will be reduced to reflect the proportionate
                           share of the facility that is used for transport of
                           traffic originated by GTE. The Parties will negotiate
                           an initial factor representative of the proportionate
                           share of the facilities. This factor will be updated
                           quarterly in like manner or as the Parties otherwise
                           agree.

         4.3      Trunking Requirements.

                  4.3.1    The Parties agree to establish trunk groups of
                           sufficient capacity from the interconnecting
                           facilities such that trunking is available to any
                           switching center designated by either Party,
                           including end offices, tandems, 911 routing switches,
                           and directory assistance/operator service switches.
                           The Parties will mutually agree where one-way or
                           two-way trunking will be available. The Parties may
                           use two-way

                                      V-4


<PAGE>   43


                           trunks for delivery of local traffic or either Party
                           may elect to provision its own one-way trunks for
                           delivery of local traffic to the other Party. If a
                           Party elects to provision its own one-way trunks,
                           that Party will be responsible for its own expenses
                           associated with the trunks.

                  4.3.2    DTI shall make available to GTE trunks over which GTE
                           shall terminate to end users of DTI-provided Exchange
                           Services, Local Traffic and intraLATA toll or
                           optional EAS traffic originated from end users of
                           GTE-provided Exchange Service.

                  4.3.3    DTI and GTE shall, where applicable, make 
                           reciprocally available, by mutual agreement, the
                           required trunk groups to handle different traffic
                           types. DTI and GTE will support the provisioning of
                           trunk groups that carry combined or separate Local
                           Traffic and intraLATA toll and optional EAS traffic.
                           GTE requires separate trunk groups from DTI to
                           originate and terminate interLATA calls and to
                           provide Switched Access Service to IXCs. To the
                           extent DTI desires to have any Interexchange Carriers
                           (IC) originate or terminate traffic to DTI, DTI will
                           arrange for such IC to issue an ASR to GTE
                           instructing GTE to route such traffic over the
                           appropriate IC trunk group. Until GTE receives and
                           processes such ASR, the traffic will not be routed.

                           4.3.3.1    Each Party agrees to route traffic only
                                      over the proper jurisdictional trunk
                                      group.

                           4.3.3.2    Each Party shall only deliver traffic over
                                      the local interconnection trunk groups to
                                      the other Party's access tandem for those
                                      publicly-dialable NXX Codes served by end
                                      offices that directly subtend the access
                                      tandem or to those wireless service
                                      providers that directly subtend the access
                                      tandem.

                           4.3.3.3    Neither party shall route Switched Access
                                      Service traffic over local interconnection
                                      trunks, or local traffic over Switched
                                      Access Service trunks.

                  4.3.4    DTI and GTE will reciprocally provide Percent Local
                           Usage (PLU) factors to each other on a quarterly
                           basis to identify the proper jurisdiction of each
                           call type that is carried over the required trunks.

                  4.3.5    Reciprocal traffic exchange arrangement trunk
                           connections shall be made at a DS-1 or multiple DS-1
                           level, DS-3, (SONET where technically available) and
                           shall be jointly-engineered to an objective P.01
                           grade of service.

                  4.3.6    DTI and GTE agree to use diligent efforts to develop
                           and agree on a Joint Interconnection Grooming Plan
                           prescribing standards to ensure that the reciprocal
                           traffic exchange arrangement trunk groups are
                           maintained at consistent P.01 or better grades of
                           service. Such plan shall also include mutually-agreed
                           upon default standards for the configuration of all
                           segregated trunk groups.

                  4.3.7    Signaling System 7 (SS7) Common Channel Signaling
                           will be used to the extent that such technology is
                           available.

                  4.3.8    The Parties agree to offer and provide to each other
                           B8ZS Extended Superframe Format ("ESF") facilities,
                           where available, capable of voice and data traffic
                           transmission.

                  4.3.9    The Parties will support intercompany 64kbps clear
                           channel where available.


                                      V-5


<PAGE>   44


         4.4      Network Redesigns Initiated by GTE. GTE will not charge DTI
                  when GTE initiates its own network redesigns/reconfigurations.

         4.5      Interconnection Calling and Called Scopes for the Access 
                  Tandem Interconnection and the End Office Interconnection.

                  4.5.1    GTE Access Tandem Interconnection calling scope
                           (originating and terminating) is to those GTE end
                           offices which subtend the GTE access tandem to which
                           the connection is made except as provided for in
                           Section 3.3 of this Article V.

                  4.5.2    GTE End Office Interconnection calling scope
                           (originating and terminating) is only to the end
                           office to which the connection is made.

5.       Indirect Network Interconnection. Neither Party shall deliver traffic
         destined to terminate at the other Party's end office via another LEC's
         end office. In addition, neither Party shall deliver traffic destined
         to terminate at an end office subtending the other Party's access
         tandem via another LEC's access tandem until such time as compensation
         arrangements have been established in accordance with this Article V,
         Sections 3.1 and 3.4.

6.       Number Resources.

         6.1      Number Assignment. Nothing in this Agreement shall be
                  construed to, in any manner, limit or otherwise adversely
                  impact DTI's right to employ or to request and be assigned any
                  NANP number resources including, but not limited to, Central
                  Office (NXX) Codes pursuant to the Central Office Code
                  Assignment Guidelines. Any request for numbering resources by
                  DTI shall be made directly to the NANP Number Plan
                  Administrator. Except with respect to those areas in which GTE
                  is the NANP Number Plan Administrator, GTE shall not be
                  responsible for the requesting or assignment of number
                  resources to DTI. The Parties agree that disputes arising from
                  numbering assignment shall be arbitrated by the NANP Number
                  Plan Administrator. DTI shall not request number resources to
                  be assigned to any GTE switching entity.

                  6.1.1    Each Party shall be responsible for notifying its
                           customers of any changes in numbering or dialing
                           arrangements to include changes such as the
                           introduction of new NPAs or new NXX codes. Each Party
                           is responsible for administering NXX codes assigned
                           to it.

         6.2      Rate Centers. For purposes of compensation between the Parties
                  and the ability of GTE to appropriately apply its toll tariff
                  to its end user customers, DTI shall adopt the Rate Center
                  areas and Rate Center points that the Commission has approved
                  for the incumbent LEC and shall assign whole NPA-NXX codes to
                  each Rate Center.

         6.3      Routing Points. DTI will also designate a Routing Point for
                  each assigned NXX code. DTI may designate one location within
                  each Rate Center as a Routing Point for the NPA-NXX associated
                  with that Rate Center; alternatively DTI may designate a
                  single location within one Rate Center to serve as the Routing
                  Point for all the NPA-NXXs associated with that Rate Center
                  and with one or more other Rate Centers served by DTI within
                  an existing GTE exchange area and LATA.

         6.4      Code and Numbers Administration. The Parties will comply with
                  code administration requirements as prescribed by the FCC, the
                  Commission, and accepted industry guidelines. Where GTE is the
                  NANP Number Plan Administrator, GTE will administer number
                  resources, and charge for such administration in accord with
                  applicable rules and regulations. GTE will administer
                  numbering resources in a competitively neutral manner, and
                  process requests for NXX codes in a timely manner and in
                  accord with industry standards. The Parties shall protect DTI
                  proprietary information that may be submitted to

                                      V-6


<PAGE>   45


                  GTE in connection with GTE's responsibilities as NANP Number
                  Plan Administrator in accordance with Article III, Section 11
                  of this Agreement.

         6.5      Programming Switches. It shall be the responsibility of each
                  Party to program and update its own switches and network
                  systems pursuant to the Local Exchange Routing Guide ("LERG")
                  guidelines to recognize and route traffic to the other Party's
                  assigned NXX codes at all times. Neither Party shall impose
                  any fees or charges whatsoever on the other Party for such
                  activities.

7.       Interim Number Portability (INP). Each Party shall provide the other
         Party with INP for the purpose of allowing end user customers to change
         service-providing Parties without changing their telephone number. GTE
         shall provide its INP to DTI using remote call forwarding ("RCF"). The
         GTE rates for INP service using RCF are set out in Appendix E attached
         to this Agreement and made a part hereof. If DTI wishes to use Direct
         Inward Dialing ("DID") to provide INP to its end users, DTI may
         purchase DID service from GTE at the rate specified in the appropriate
         GTE tariff. DTI shall provide INP to GTE at the rates specified for DTI
         in Appendix E.

8.       Meet-Point Billing.

8.1      Meet-Point Arrangements.

         8.1.1    The Parties may mutually establish Meet-Point Billing ("MPB")
                  arrangements in order to provide Switched Access Services to
                  Access Service customers via a GTE access tandem in accordance
                  with the MPB guidelines adopted by and contained in the
                  Ordering and Billing Forum's MECAB and MECOD documents, except
                  as modified herein and as described in Section 3.2.3 for
                  Interim Portability.

         8.1.2    Except in instances of capacity limitations, GTE shall permit
                  and enable DTI to sub-tend the GTE access tandem(s) nearest to
                  the DTI Rating Point(s) associated with the NPA-NXX(s) to/from
                  which the Switched Access Services are homed. In instances of
                  capacity limitation at a given access tandem, DTI shall be
                  allowed to subtend the next-nearest GTE access tandem in which
                  sufficient capacity is available.

         8.1.3    Interconnection for the MPB arrangement shall occur at the 
                  "IP".

         8.1.4    Common Channel Signaling shall be utilized in conjunction with
                  MPB arrangements to the extent such signaling is resident in
                  the GTE access tandem switch.

         8.1.5    DTI and GTE will use diligent efforts, individually and
                  collectively, to maintain provisions in their respective
                  federal and state access tariffs, and/or provisions within the
                  National Exchange Carrier Association ("NECA") Tariff No. 4,
                  or any successor tariff, sufficient to reflect this MPB
                  arrangement, including MPB percentages.

         8.1.6    As detailed in the MECAB document, DTI and GTE will, in a
                  timely fashion, exchange all information necessary to
                  accurately, reliably and promptly bill Access Service
                  customers for Switched Access Services traffic jointly handled
                  by DTI and GTE via the meet-point arrangement. Information
                  shall be exchanged in Electronic Message Record ("EMR")
                  format, on magnetic tape or via a mutually acceptable
                  electronic file transfer protocol.

         8.1.7    DTI and GTE shall work cooperatively to coordinate rendering
                  of Meet-Point bills to customers, and shall reciprocally
                  provide each other usage data and related information at the
                  appropriate charge.

                                      V-7


<PAGE>   46



8.2      Compensation.

         8.2.1    Initially, billing to Access Service customers for the
                  Switched Access Services jointly provided by DTI and GTE via
                  the MPB arrangement shall be according to the multiple-bill
                  method as described in the MECAB guidelines. This means each
                  Party will bill the portion of service they provided at their
                  appropriate tariff, or price list.

         8.2.2    Subsequently, DTI and GTE may mutually agree to implement one 
                  of the following options for billing to third parties for the
                  Switched Access Services jointly provided by DTI and GTE via
                  the MPB arrangement: single-bill/single tariff method,
                  single-bill/multiple tariff method, or to continue the
                  multiple-bill method. Should either Party prefer to change
                  among these billing methods, that Party shall notify the other
                  Party of such a request in writing, ninety (90) Business Days
                  in advance of the date on which such change is desired to be
                  implemented, such changes then may be made in accordance with
                  MECAB guidelines and if the Parties mutually agree, the change
                  will be made.

9.       Common Channel Signaling.

9.1      Service Description. The Parties will provide Common Channel Signaling
         ("CCS") to one another via Signaling System 7 ("SS7") network
         interconnection, where and as available, in the manner specified in FCC
         Order 95-187, in conjunction with all traffic exchange trunk groups.
         SS7 signaling and transport services shall be provided by GTE in
         accordance with the terms and conditions of this Section 9 of this
         Article and Appendix J attached to this Agreement and made a part
         hereof. The Parties will cooperate on the exchange of all appropriate
         SS7 messages for local and intraLATA call set-up signaling, including
         ISUP and Transaction Capabilities Application Part ("TCAP") messages to
         facilitate full interoperability of all CLASS Features and functions
         between their respective networks. Any other SS7 message services to be
         provided using TCAP messages (such as data base queries) will be
         jointly negotiated and agreed upon.

9.2      Signaling Parameters. All SS7 signaling parameters will be provided in
         conjunction with traffic exchange trunk groups, where and as available.
         These parameters include Automatic Number Identification ("ANI"),
         Calling Party Number ("CPN"), Privacy Indicator, calling party category
         information, originating line information, charge number, etc. Also
         included are all parameters relating to network signaling information,
         such as Carrier Information Parameter ("CIP"), wherever such
         information is needed for call routing or billing. GTE will provide SS7
         via GR-394-SS7 and/or GR-317-SS7 format(s).

9.3      Privacy Indicators.  Each Party will honor all privacy indicators as 
         required under applicable law.

9.4      Connection Through STP. DTI must interconnect with the GTE STP(s)
         serving the LATA in which the traffic exchange trunk groups are
         interconnected. Additionally, all interconnection to GTE's 800/888
         database and GTE's LIDB shall, consistent with this section and
         Appendix J attached hereto, take place only through appropriate STP
         pairs.

9.5      Third Party Signaling Providers. DTI may choose a third-party SS7
         signaling provider to transport messages to and from the GTE SS7
         network. In that event, that third-party provider must present a letter
         of agency to GTE, prior to the testing of the interconnection,
         authorizing the Third Party to act on behalf of DTI in transporting SS7
         messages to and from GTE. The third-party provider must interconnect
         with the GTE STP(s) serving the LATA in which the traffic exchange
         trunk groups are interconnected.

9.6      Multi-Frequency Signaling. In the case where CCS is not available, in
         band Multi-Frequency ("MF"), wink start, E & M channel associated
         signaling with ANI will be provided by the Parties. Network signaling
         information, such as CIC/OZZ, will be provided wherever such
         information is needed for call routing or billing.

                                      V-8


<PAGE>   47


10.      Service Quality and Performance. Each Party shall provide Services
         under this Article to the other Party that are equal in quality to that
         the Party provides to itself, its Affiliates or any other entity.
         "Equal in quality" shall mean that the Service will meet the same
         technical criteria and performance standards that the providing Party
         uses within its own network for the same Service at the same location
         under the same terms and conditions.

11.      Network Outages. GTE shall work with DTI to establish reciprocal
         responsibilities for managing network outages and reporting. Each party
         shall be responsible for network outage as a result of termination of
         its equipment in GTE wire center or access tandem. DTI shall be
         responsible for notifying GTE of significant outages which could impact
         or degrade GTE switches and services.

                                      V-9

<PAGE>   48


                                   ARTICLE VI
                               RESALE OF SERVICES
1.       General. The purpose of this Article VI is to define the Exchange
         Services and related Vertical Features and other Services (collectively
         referred to for purposes of this Article VI as the "Services") that may
         be purchased from GTE and resold by DTI and the terms and conditions
         applicable to such resold Services. Except as specifically provided
         otherwise in this Agreement, provisioning of Exchange Services for
         resale will be governed by the GTE Guide. GTE will make available to
         DTI for resale any Telecommunications Service that GTE currently
         offers, or may offer hereafter, on a retail basis to subscribers that
         are not telecommunications carriers, except as qualified by Section 2.2
         below.

2.       Terms and Conditions.

2.1      Quality and Performance. GTE shall provide Services to DTI that are
         equal in quality and performance standards to the same Services
         provided by GTE to its own end user customers.

2.2      Restrictions on Resale. The following restrictions shall apply to the
         resale of retail services by DTI. 

         2.2.1  DTI shall not resell Basic Exchange Residential Service.

         2.2.2  DTI shall not resell to one class of customers a service that is
                offered by GTE only to another class of customers in accordance
                with State requirements (e.g., R-1 to B-1, disabled services or
                Lifeline services to non-qualifying customers).

         2.2.3  DTI shall not resell public pay telephone lines. 

         2.2.4  DTI shall not resell semi-public pay telephone lines.

2.3      Restrictions on Discount of Retail Services. The discount specified in
         Section 5.3 herein shall apply to all retail services except for the
         following: 

         2.3.1  DTI shall resell services that are provided at a volume 
                discount in accordance with terms and conditions of applicable
                tariff. DTI shall not aggregate end user traffic in order to
                qualify for volume discount.

         2.3.2  DTI shall resell ICB/Contract services without a discount and
                only to end user customers that already have such services.

         2.3.3  DTI shall resell COCOT coin or coinless line but no discount
                applies.

         2.3.4  DTI shall resell Lifeline services and services for the disabled
                but no discount shall apply and they shall only be resold to end
                user customers who qualify under GTE's tariffs and
                state/Commission rules, orders and regulations.

         2.3.5  DTI shall resell special access but no discount applies.

         2.3.6  DTI shall resell Operator Services and Directory Assistance as
                specified in Section 5.6 herein however no discount applies.

         2.3.7  DTI shall resell promotional offerings that are ninety (90) days
                or less in duration without a discount.


                                      VI-1
<PAGE>   49

2.4      Resale to Other Carriers. Services available for resale may not be used
         by DTI to provide access to the local network as an alternative to
         tariffed switched and special access by other carriers, including, but
         not limited to; interexchange carriers, wireless carriers, competitive
         access providers, or other retail telecommunications providers.

3.       Ordering and Billing.

3.1      Local Service Request. Orders for resale of Services will be placed
         utilizing a standard Local Service Request ("LSR") form. GTE will
         continue to participate in industry forums for developing service
         order/disconnect order formats and will incorporate appropriate
         industry standards. A complete and accurate LSR (containing the
         requisite end user information as described in the Guide) must be
         provided by DTI before a request can be processed.

3.2      Certificate of Operating Authority. When ordering, DTI must represent
         and warrant to GTE that it is a certified provider of local dial-tone
         service. DTI will provide a copy of its Certificate of Operating
         Authority or other evidence of its status to GTE upon request.

3.3      Letter of Authorization. A Letter of Authorization ("LOA") will be
         required before resold Services will be provided in cases in which the
         subscriber currently receives Exchange Service from GTE or from a local
         service provider other than DTI. Such LOA may be a blanket LOA or such
         other form as agreed upon between GTE and DTI. GTE will not release
         information to DTI on GTE end user customer accounts unless DTI first
         provides to GTE a written LOA, signed by the end user customer,
         authorizing the release of such information to DTI or if state or
         federal law provides otherwise, in accordance with such law.

3.4      Directory Assistance Listings. GTE shall include a DTI customer listing
         in its Directory Assistance database as part of the Local Service
         Request ("LSR") process. GTE will honor DTI Customer's preferences for
         listing status, including non-published and unlisted, as noted on the
         LSR and will enter the listing in the GTE database which is used to
         perform Directory Assistance functions as it appears on the LSR.

3.5      Nonrecurring Charges. DTI shall be responsible for the payment of all
         nonrecurring charges ("NRCs") applicable to resold Services (e.g.,
         installation, changes, ordering charges) in accordance with the
         appropriate tariff. No discount applies to nonrecurring charges.

3.6      Transfers Between DTI and Another Reseller of GTE Services. When DTI
         has obtained an end user customer from another reseller of GTE
         services, DTI will inform GTE of the transfer by submitting a standard
         LSR to GTE.

3.7      Local Calling Detail. Except for those Services and in those areas
         where measured rate local service is available to end users, monthly
         billing to DTI does not include local calling detail. However, DTI may
         request and GTE shall consider developing the capabilities to provide
         local calling detail in those areas where measured local service is not
         available for a mutually agreeable charge.

3.8      Procedures. An overview of the procedures for preordering, ordering,
         provisioning and billing for resold services are outlined in Appendix
         I, attached hereto and made a part hereof.

3.9      LIDB. For resale services, GTE's service order will generate updates to
         the LIDB for validation of calling card, collect, and third number
         billed calls.

3.10     "OLN". Upon request, GTE will update the database to provide
         Originating Line Number ("OLN") Screening which indicates to an
         operator the acceptable billing methods for calls originating from the
         calling number (e.g., penal institutions, COCOTS).


                                      VI-2
<PAGE>   50

4.       Maintenance.

4.1      Maintenance, Testing and Repair. GTE will provide repair and
         maintenance services to DTI and its end user customers for resold
         Services in accordance with the same standards and charges used for
         such services provided to GTE end user customers. GTE will not initiate
         a maintenance call or take action in response to a trouble report from
         a DTI end user until such time as trouble is reported to GTE by DTI.
         DTI must provide to GTE all end user information necessary for the
         installation, repair and servicing of any facilities used for resold
         Services according to the procedures described in the Guide.

4.2      Specifics and Procedures for Maintenance. An overview of the procedures
         for maintenance of resold services and additional matters agreed to by
         the Parties concerning maintenance are set forth in Appendix I.

5.       Services Available for Resale.

5.1      Description of Local Exchange Services Available for Resale. Resold
         basic Exchange Service includes, but is not limited to, the following
         elements: 

         (a) Voice Grade Local Exchange Access Line - includes a telephone
             number and dial tone.

         (b) Local Calling - at local usage measured rates if applicable to the
             end user customer.

         (c) Access to long distance carriers

         (d) E-911 Emergency Dialing

         (e) Access to Service Access Codes - e.g., 800, 888, 900

         (f) Use of AIN Services (those currently available to end users)

         (g) End User Private Line Services

         (h) Listing of telephone number in appropriate "white pages" directory;
             and

         (i) Copy of "White Pages" and "Yellow Pages" directories for the
             appropriate GTE service area

5.2      List of Services Available for Resale. The type of Services listed on
         Appendix F, attached hereto and made a part of this Agreement, are
         available for resale by DTI. Subject to the limitations on resale
         enumerated in this Article, any new services that GTE offers in the
         future at retail to customers who are not telecommunications carriers
         shall also be available to DTI for resale under the same terms and
         conditions contained in this Agreement. Additional regulations, terms
         and conditions relating to the type of Services listed on Appendix F
         can be found in the appropriate intrastate local, toll and access
         tariffs. Terms, conditions and other matters concerning rate
         applications, technical parameters, provisioning capability,
         definitions and feature interactions contained in such tariffs are
         applicable to the type of Services offered under this Agreement and are
         incorporated herein by reference. Modifications to Services listed on
         Appendix F shall be provided to DTI in accordance with GTE's practices
         and procedures.

5.3      Rates. The prices charged to DTI for Local Services shall be calculated
         as follows: 

         (1) Avoided Cost Discount of 11.93% shall apply to all retail services
             except those services listed in Section 2.2 and Section 2.3 herein.


                                      VI-3
<PAGE>   51

         (2) The discount dollar amount calculated under Step 1 above will be
             deducted from the retail rate.

         (3) The resulting rate is a Wholesale Rate.

         (4) This discount dollar amount in Step 2 above shall not change during
             the Term of this Agreement, even though GTE may change its retail
             rates.

5.4      Grandfathered Services. Services identified in GTE Tariffs as
         grandfathered in any manner are available for resale only to end user
         customers that already have such grandfathered service. An existing end
         user customer may not move a grandfathered service to a new service
         location.

5.5      Access. GTE retains all revenue due from other carriers for access to
         GTE facilities, including both switched and special access charges.

5.6      Operator Services (OS) and Directory Assistance (DA). Where GTE
         provides access to GTE Operator Services for local and toll assistance
         (for example, call completion, busy line verification and emergency
         interruption) and Directory Assistance (e.g., 411 calls routed to GTE's
         DA operator centers) as an element of Exchange Services offered for
         resale, DTI will be billed in accordance with Appendix F. GTE will
         provide its existing OS and DA to a DTI at the same quality and in a
         nondiscriminatory manner as the service GTE's end users receive. 

         5.6.1  Where Customized Routing is available (pursuant to Article VII,
                Section 12.1), GTE will offer unbranded OS and DA or rebranded
                OS and DA with the DTI brand. GTE will provide such unbranding
                or rebranding on a switch-by-switch basis, subject to capability
                and capacity limitations. Upon receipt of an order for
                unbranding or rebranding, GTE will implement within 90 Business
                Days when technically capable.

         5.6.2  DTI will be billed for unbranding or rebranding and Customized
                Routing. Upon written request from DTI, GTE will provide DTI
                with terms and conditions for providing Customized Routing and
                branding, plus the applicable charges. In addition, a port and
                dedicated trunk facilities are required as specified in Article
                VII, Section 12.1.4.

         5.6.3  For those offices that DTI has requested GTE to rebrand and/or
                unbrand OS and DA, GTE will provide it using live operators
                where GTE performs its own OS and DA service and where handled
                by automated systems. If GTE uses a Third Party contractor to
                provide OS or DA, GTE will not provide branding nor will GTE
                negotiate it with a Third Party on behalf of DTI. DTI must
                negotiate with the Third Party. In these instances, DTI will
                need to purchase customized routing to differentiate OS/DA
                traffic between GTE's and a Third Party.


                                      VI-4
<PAGE>   52

                                   ARTICLE VII
                           UNBUNDLED NETWORK ELEMENTS

1.       General. The purpose of this Article VII is to define the unbundled
         network elements that may be leased by DTI from GTE. Unless otherwise
         specified in this Agreement, provisioning of unbundled network
         arrangements will be governed with the GTE Customer Guide for DTI
         Establishment of Services - Resale and Unbundling (the "Guide").
         Additional procedures for preordering, ordering, provisioning and
         billing of unbundled network elements are outlined in Appendix I.

2.       Unbundled Network Elements.

2.1      Categories. There are several separate categories of Network Components
         that shall be provided as unbundled network elements by GTE:

         (a)      Network Interface Device or NID

         (b)      Loop Elements

         (c)      Port and Local Switching Elements

         (d)      Transport Elements

         (e)      Signaling Elements

         (f)      Data Switching

         (g)      Digital Cross Connect System (DCS)

2.2      Prices. Individual unbundled network elements and prices are identified
         on Appendix G attached to this Agreement and made a part hereof, or
         under the appropriate GTE tariff as referenced in this Article.
         Nonrecurring charges relating to unbundled elements are also listed on
         Appendix G. 

         2.2.1  Reciprocal Compensation Arrangements for Call Termination.
                Reciprocal compensation arrangements for call termination shall
                be as provided in Appendix M attached hereto.

2.3      Interconnection to Unbundled Elements. DTI may lease and interconnect
         to whichever of these unbundled network elements DTI chooses, and
         subject to technical feasibility, may combine these unbundled elements
         with any facilities or services that DTI may itself provide subject to
         the following:

         2.3.1  Interconnection shall be achieved via expanded
                interconnection/collocation arrangements DTI shall maintain at
                the wire center at which the unbundled services are resident.

         2.3.2  DTI may order transport pursuant to Section 6 below as follows:

                (a)      From the wire center at which the unbundled elements
                         (e.g., loop, port) are located to the GTE wire center
                         where DTI has established an
                         interconnection/collocation arrangement.

                (b)      Directly from the DTI switch to a GTE wire center and
                         connect to unbundled loops. Applicable charges would be
                         transport, transport termination, multiplexing,
                         loop/port connector and loop.


                                     VII-1
<PAGE>   53

         2.3.3  Each loop or port element shall be delivered to DTI collocation
                arrangement over a loop/port connector applicable to the
                unbundled services as listed on Appendix G.

         2.3.4  DTI shall combine unbundled network elements with its own
                facilities. GTE has no obligation to combine any network
                elements for DTI. DTI may not combine such network elements to
                provide solely interexchange service or solely access service to
                an interexchange carrier.

2.4      Service Quality. To the degree reasonably possible, all service
         attributes, grades-of-service and installation, maintenance and repair
         intervals which apply to the bundled service will apply to unbundled
         network elements. Notwithstanding the foregoing, GTE shall not be
         responsible for impacts on service attributes, grades of service, etc.,
         resulting from DTI's specific use of or modification to any unbundled
         network element.

3.       Network Interface Device.

3.1      Direct Connection. DTI shall be permitted to connect its own Loop
         directly to GTE's Network Interface Device or NID in cases in which DTI
         uses its own facilities to provide local service to an end user
         formerly served by GTE, as long as such direct connection does not
         adversely affect GTE's network. In order to minimize any such adverse
         effects, DTI shall follow the procedures in Sections 3.1.1 and 3.1.2
         below. 

         3.1.1  When connecting its own loop facility directly to GTE's NID for
                a residence or business customer, DTI must make a clean cut on
                the GTE drop wire at the NID so that no bare wire is exposed.
                DTI shall not remove or disconnect GTE's drop wire from the NID
                or take any other action that might cause GTE's drop wire to be
                left lying on the ground.

         3.1.2  At multi-tenant customer locations, DTI must remove the jumper
                wire from the distribution block (i.e. the NID) to the GTE cable
                termination block. If DTI cannot gain access to the cable
                termination block, DTI must make a clean cut at the closest
                point to the cable termination block. At DTl's request and
                discretion, GTE will determine the cable pair to be removed at
                the NID in multi-tenant locations. DTI will compensate GTE for
                the trip charge necessary to identify the cable pair to be
                removed.

         3.1.3  GTE agrees to offer NIDs for lease to DTI but not for sale. DTI
                may remove GTE identification from any NID which it connects to
                a DTI loop, but DTI may not place its own identification on such
                NID.

         3.1.4  GTE Loop elements leased by DTI will be required to terminate
                only on a GTE NID. If DTI leasing a GTE loop wants a DTI NID,
                they will also be required to lease a GTE NID for the direct
                loop termination and effect a NID to NID connection.

3.2      NID to NID Connection. Rather than connecting its loop directly to
         GTE's NID, DTI may also elect to install its own NID and effect a NID
         to NID connection to gain access to the end user's inside wiring. 

         3.2.1  DTI that provides its own loop facilities may elect to move all
                inside wire terminated on a GTE NID to one provided by DTI. In
                this instance, a NID to NID connection will not be required.
                DTI, or the end user premise owner, can elect to leave the GTE
                disconnected NID in place, or to remove the GTE NID from the
                premise and dispose of it entirely.

3.3      Removal of Cable Pairs. Removal of existing cable pairs required for
         DTI to terminate service is the responsibility of DTI.



                                     VII-2
<PAGE>   54

3.4      Maintenance. When DTI provides its own loop and connects directly to
         GTE's NID, GTE does not have the capability to perform remote
         maintenance. DTI can perform routine maintenance via its loop and
         inform GTE once the trouble has been isolated to the NID and GTE will
         repair (or replace) the NID, or, at DTI's option, it can make a NID to
         NID connection, using the GTE NID only to gain access to the inside
         wire at the customer location.

4.       Loop Elements.

4.1      Service Description. a "Loop" is an unbundled component of Exchange
         Service. In general, it is the transmission facility (or channel or
         group of channels on such facility) which extends from a Main
         Distribution Frame ("MDF') or functionally comparable piece of
         equipment in a GTE end office or wire center to a demarcation or
         connector block in/at a subscriber's premises. Traditionally, Loops
         were provisioned as 2-wire or 4-wire copper pairs running from the end
         office MDF to the customer premises. However, a loop may be provided
         via other media, including radio frequencies, as a channel on a high
         capacity feeder/distribution facility which may, in turn, be
         distributed from a node location to the subscriber premises via a
         copper or coaxial drop facility, etc.

4.2      Categories of Loops.  There are six general categories of loops:

         4.2.1  "2-wire analog voice grade" loops will support analog
                transmission of 300-3000 Hz, repeat loop start or ground start
                seizure and disconnect in one direction (toward the end office
                switch), and repeat ringing in the other direction (toward the
                end user). This loop is commonly used for local dial tone
                service;

         4.2.2  "4-wire analog voice grade" loops conform to the characteristics
                of a 2-wire voice grade loop and, in addition, can support the
                simultaneous independent transmission of information in both
                directions;

         4.2.3  "2-wire digital" loops will support industry standard
                specifications for digital transmission. Special provisioning
                (removal of bridge taps and/or load coils) will be required to
                conform to these industry standards. The price for 2-wire
                digital loops shall be the price for the basic 2-wire loop plus
                the loop facility NRC to recover the cost of the special
                provisioning.

         4.2.4  "4-wire digital" loops will support industry standard
                specifications for digital transmission. Special provisioning
                (removal of bridge taps and/or load coils) will be required to
                conform to these industry standards. The price for 4-wire
                digital loops shall be the price for the basic 4-wire loop plus
                the loop facility NRC to recover the cost of the special
                provisioning.

         4.2.5  "DS-1" loops will support a digital transmission rate of 1.544
                Mbps. The DS-1 loop will have no bridge taps or load coils and
                will employ special line treatment. DS-1 loops will include span
                line repeaters where required, office terminating repeaters, and
                DSX cross connects. Prices for DS-1 grade loops are the prices
                set forth in the appropriate GTE intrastate special access
                tariff.

         4.2.6  "DS-3" loops will support the transmission of isochronous
                bipolar serial data at a rate of 44.736 Mbps. This DS-3 type of
                loop provides the equivalent of 28 DS-1 channels and shall
                include the electronics at either end.

4.3      Conditioned Loops. DTI may also require that the loops ordered above be
         conditioned in order for them to provide the end-user service. Examples
         of this type of conditioning are: Type C, Type DA, Improved C, Clear
         Channel, etc. The price for such a conditioned loops shall be the
         applicable charge as provided in the appropriate GTE intrastate special
         access tariff.


                                     VII-3
<PAGE>   55

4.4      Features, Functions, Attributes. To the degree reasonably possible, all
         transport-based features, functions, service attributes,
         grades-of-service, installation, maintenance and repair intervals that
         apply to the bundled services will apply to unbundled loops. 

         4.4.1  GTE will not perform routine testing of the unbundled loop for
                maintenance purposes. DTI will be required to provision a loop
                testing device either in its central office (switch location),
                Network Control Center or in its collocation arrangement to test
                the unbundled loop. GTE will perform repair and maintenance once
                trouble is identified by DTI.

         4.4.2  All Loop facilities furnished by GTE on the premises of DTI's
                end users and up to the network interface or functional
                equivalent are the property of GTE. GTE must have access to all
                such facilities for network management purposes. GTE employees
                and agents may enter said premises at any reasonable hour to
                test and inspect such facilities in connection with such
                purposes or, upon termination or cancellation of the Loop
                facility, to remove such facility.

         4.4.3  GTE will provide loop transmission characteristics to DTI end
                users which are equal to those provided to GTE end users.

         4.4.4  If DTI leases loops which are conditioned to transmit digital
                signals, as a part of that conditioning, GTE will test the loop
                and provide recorded test results to DTI. In maintenance and
                repair cases, if loop tests are taken, GTE will provide any
                recorded readings to DTI at time the trouble ticket is closed in
                the same manner as GTE provides to itself and its end users.

4.5      Dial Loop Carrier. Where GTE utilizes integrated digital loop carrier
         ("IDLC")1 technology to provision the Loop element, GTE will take the
         necessary affirmative steps to provide unbundled Loops. The basic Loop
         provided will support voice grade services. Loop capabilities beyond
         voice grade (i.e., ISDN, ADSL, etc.) will be provided under the terms
         and conditions, and at the prices indicated in Section 4.3. 

         4.5.1  GTE will permit DTI to collocate digital loop carriers and
                associated equipment in conjunction with collocation
                arrangements DTI maintains at a GTE wire center for the purpose
                of interconnecting to unbundled Loop elements.

4.6      Unbundled Loop Facility Certification.

         4.6.1  Before deploying any service enhancing copper cable technology
                (e.g., HDSL, ISDN, etc.) over unbundled 2-wire analog voice
                grade loops leased from GTE, DTI shall notify GTE of such
                intentions to enable GTE to assess the loop transport facilities
                to determine whether there are any existing copper cable loop
                transport technologies (e.g., analog carrier, etc.) deployed
                within the same cable sheath that would be interfered with if
                DTI deployed the proposed service enhancing copper cable
                technology. If there are existing copper cable loop transport
                technologies already deployed within the same cable sheath, or
                if GTE already has existing near term (within 18 months of the
                date of facility certification) plans to deploy copper cable
                loop transport technologies that would be interfered with as
                described above, GTE will so inform DTI and DTI shall not be
                permitted to deploy such service enhancing copper cable
                technologies. GTE will charge DTI the applicable engineering
                time and labor costs to perform the certification.


- --------
(1) See Bellcore TR-TSY-000008, Digital Interface Between the SLC-96 Digital 
Loop Carrier System and Local Digital Switch and TR-TSY-000303, Integrated
Digital Loop Carrier (IDLC) Requirements, Objectives and Interface.



                                     VII-4
<PAGE>   56

         4.6.2  If DTI fails to notify GTE of its plans to deploy service
                enhancing copper cable technology and obtain prior certification
                from GTE of the facilities, if DTI's deployment of such
                technology is determined to have caused interference with
                existing or planned copper cable loop transport technologies
                deployed by GTE in the same cable sheath, DTI will immediately
                remove such service enhancing copper cable technology and shall
                reimburse GTE for all incurred expense related to this
                interference.

4.7      Unbundled Loop Facility Notification.

         4.7.1  GTE reserves the right to deploy within its network at its sole
                discretion any and all copper cable loop transport technologies.
                If GTE plans to deploy copper cable loop transport technology
                within a cable sheath in which such technology was not
                previously deployed, GTE will provide notice to DTI of such
                planned deployment, indicating all service enhancing copper
                cable technologies that would cause interference with the
                technology to be deployed, or that would be interfered with by
                the deployment of such technology. Such notice will be provided
                at least ninety (90) Business Days in advance of the planned
                deployment. If DTI has deployed any technologies within the same
                cable sheath that would interfere with, or be interfered with,
                by the technology GTE plans to deploy, the parties will work
                together to resolve the situation.

4.8      Subloops.

         4.8.1  GTE will provide as separate items the loop distribution, loop
                concentrator and loop feeder on a case-by-case basis pursuant to
                a Bona Fide Request ("BFR").

         4.8.2  GTE will design and construct loop access facilities (including
                loop feeders and loop concentration/multiplexing systems) in
                accordance with standard industry practices as reflected in
                applicable tariffs and/or as agreed to by GTE and DTI.

         4.8.3  Transport for loop concentrators/multiplexers services not
                supported by embedded technologies will be provided pursuant to
                applicable tariffs or as individually agreed upon by GTE and
                DTI. The Parties understand that embedded loop
                concentrators/multiplexers are not necessarily capable of
                providing advanced and/or digital services.

         4.8.4  GTE will provide loop transmission characteristics as specified
                in Section 4.4.3 herein.

5.       Port and Local Switching Elements.

5.1      Port. Port is an unbundled component of Exchange Service that provides
         for the interconnection of individual loops or trunks to the switching
         components of GTE's network. In general, it is a line card or trunk
         card and associated peripheral equipment on GTE end office switch that
         serves as the hardware termination for the end user's Exchange Service
         on that switch and generates dial tone and provides the end user access
         to the public switched telecommunications network. The port does not
         include such features and functions which are provided as part of Local
         Switching. Each line-side port is typically associated with one (or
         more) telephone number(s), which serve as the end user's network
         address.

5.2      Ports Available as Unbundled Network Elements. There are four types of
         Ports available as unbundled network elements; 

         5.2.1  "2-wire analog line" Port is a line side switch connection
                employed to provide basic residential and business type Exchange
                Service.

         5.2.2  "2-wire ISDN digital line" Port is a Basic Rate Interface (BRI)
                line side switch connection employed to provide ISDN Exchange
                Services.


                                     VII-5
<PAGE>   57

         5.2.3    "DS-1 digital trunk" Port is a direct inward dialing (DID)
                  trunk side switch connection employed to provide the
                  equivalent of 24 analog incoming trunk type Exchange Services.

         5.2.4    "4-wire ISDN digital DS-1 trunk" Port is a Primary Rate
                  Interface (PRI) trunk side switch connection employed to
                  provide the ISDN Exchange Services

5.3      Port Prices. Prices for 2-wire analog and DS-1 Ports are listed in
         Appendix G. 2-wire ISDN line side Ports and 4-wire ISDN trunk side
         Ports shall be provided at a price agreed to by the Parties.

5.4      Local Switching. Local switching provides the basic switching functions
         to originate, route and terminate traffic and any signaling deployed in
         the switch. Vertical features are optional services provided through
         software programming in the switch which can be added on a per-feature
         basis with applicable rate. GTE will offer only those features and
         functions currently available to the particular platform used (e.g.,
         DMS, 5ESS, GTD5). Any feature or function which is not available, but
         the switch is capable of providing, may be requested via the BFR
         process. DTI will be responsible for bearing any costs incurred by GTE
         in making such feature/function available, including Right-to-Use (RTU)
         fees. The rates for Local Switching and Vertical Features are listed in
         Appendix G. 

5.4.1    DTI must purchase Local Switching with the line-side Port or 
         trunk-side Port, if applicable.

5.5      Compliance with Section 2.3. DTI shall only order unbundled elements in
         accordance with Section 2.3 herein and it will be the responsibility of
         DTI to make arrangements for the delivery of interexchange traffic and
         routing of traffic over interoffice transmission facilities, if
         applicable.

6.       Transport Facility.

6.1      Service Description. Transport is an unbundled component of Exchange
         Service. In general, it is the transmission facility (or channel or
         group of channels on such facility) which extends from a Main
         Distribution Frame (MDF) or functionally comparable piece of equipment
         in a GTE end office or access tandem to either (l) another MDF or
         functionally comparable piece of equipment in a GTE end office or
         access tandem, or (ii) a meet point with transport facilities of DTI or
         another carrier. Transport may be provided over a variety of media,
         including, but not limited to, copper cables, radio frequencies or
         channels on a high capacity facility. 

         6.1.1  Tandem Switching Capability. GTE will provide tandem switching
                capability at GTE access tandems for traffic between DTI and GTE
                end offices subtending the GTE access tandem and for traffic
                between DTI and non-GTE end offices subtending GTE access
                tandems. GTE will provide the features and functions that are
                centralized in tandem switches including but not limited to call
                recording, the routing of calls to operator services when
                technically feasible, and signaling conversion features.

6.2      Categories/Types. Unbundled transport is provided under rates, terms
         and conditions of the applicable GTE access tariff or local private
         line tariff.

7.       SS7 Transport and Signaling. SS7 signaling and transport services in
         support of DTI's local exchange services shall be provided in
         accordance with the terms and conditions of Appendix I attached to this
         Agreement and made a part hereof.

7.1      GTE will provide interconnection with its SS7 at the STPs but not at
         other points.

8.       LIDB Services. Access to GTE's LIDB shall be provided in accordance
         with the rates, terms and conditions of GTE's switched access tariff,
         GTOC Tariff FCC No. 1, Section 8.


                                     VII-6
<PAGE>   58

9.       Database 800-Type Services. Access to GTE's 800-Type database (i.e.,
         888, 877) shall be provided in accordance with the rates, terms and
         conditions of GTE's switched access tariff, GTOC Tariff FCC No. 1,
         Section 8.

10.      Data Switching.

10.1     Access. GTE will provide unbundled access to GTE data switches to DTI
         at the user network interface ("UNI") and network to network interface
         ("NNI") level subject to mutual agreement on technical standards.

10.2     Nondiscrimination. Data switching features and functionalities provided
         to DTI will be without discrimination with respect to the way GTE
         provides them to GTE end users. In the event of overflow or congestion
         conditions on the data switching network, DTI's data traffic carried on
         GTE facilities will be equal priority to GTE data traffic.

10.3     Testing, Monitoring, Administration and Maintenance.  Testing, 
         monitoring, administration and maintenance will be performed by GTE in 
         a nondiscriminatory manner.

11.      Dial Cross Connect System (DCS).

11.1     Access. GTE will provide unbundled access to the DCS element, which
         shall provide automated cross-connection (with CNC), facility grooming,
         bridging (MJU-digital), point to multipoint connections (DMB-analog),
         broadcast and automated facility test capabilities. These
         functionalities will be provided consistent with that which is provided
         to GTE end users. DTI shall submit a Bona Fide Request to GTE
         specifying these functionalities.

11.2     Optional Characteristics. The DCS element may include multiplexing,
         format conversion, signaling conversion and manual cross connection
         wiring.

11.3     Alternate Provisioning. Where no automated DCS capability exists, the
         cross connection function will be provided manually by GTE through the
         combination of DSX patch panels and D4 banks or DS0 (or higher
         capacity) equipment.

11.4     Elements.  DTI will have access to the following DCS elements:

         (a)  DS0 with DS1 interface (CNC)

         (b)  DS1/VT1.5 with DS1, DS3 and SONET interfaces (CNC and Titan 5500)

11.5     Capabilities. The DCS elements will provide the following capabilities:

         (a)  Real-time configuration (with CNC)

         (b)  Real-time access to integrated test equipment (with React and
              Customer Service)

         (c)  SONET asynchronous gateway functionality (with Titan 5500 only)

         (d)  Compliance with Bellcore and industry standards.

11.6     Protection and Performance. The unbundled DCS elements provided to DTI
         will have equipment/interface protection, redundant power supply and/or
         battery backup and performance/availability consistent with that
         provided to GTE end users.

11.7     Provisioning, Administration and Maintenance. GTE will provide
         provisioning, administration and maintenance of the DCS elements the
         same level as GTE provides to itself as well as real time 


                                     VII-7
<PAGE>   59

         access to performance monitoring and alarm data affecting DTI traffic 
         (with CNC). GTE is not required to keep software updated to the 
         "current available release" in every instance.

12.      Operator Services (OS) and Directory Assistance (DA). GTE will provide
         OS and DA to DTI in accordance with the terms set forth as follows:

         12.0.1 Where Customized Routing is available, GTE will offer unbranded
                OS and DA or rebranded OS and DA with the DTI brand. GTE will
                provide such unbranding or rebranding on a switch-by-switch
                basis, subject to capability and capacity limitations. Upon
                receipt of an order for unbranding or rebranding, GTE will
                implement within 90 Business Days when technically capable.

         12.0.2 DTI will be billed an element charge for OS and DA and a charge
                for unbranding or rebranding and Customized Routing as set forth
                in Section 12.1.2. In addition, charges specified in Section
                12.1.4 will apply.

         12.0.3 For those offices that DTI has requested GTE to rebrand and/or
                unbrand OS and DA, GTE will provide it using live operators
                where GTE performs its own OS and DA service and where handled
                by automated systems. If GTE uses a Third Party contractor to
                provide OS or DA, GTE will not provide branding nor will GTE
                negotiate it with a Third Party on behalf of DTI. DTI must
                negotiate with the Third Party. In these instances, DTI will
                need to purchase customized routing to differentiate OS/DA
                traffic between GTE's and a Third Party.

12.1     Customized Routing. Where technically feasible and upon receipt of
         written request from DTI, GTE agrees to provide customized routing for
         the following types of calls:

                                    0-
                                    0+Local
                                    0+411
                                    1+411
                                    0+HNPA-555-1212 (intraLATA, only when
                                    intraLATA presubscription is not available)
                                    1+HNPA-555-1212 (intraLATA, only when
                                    intraLATA presubscription is not available)

         12.1.1 GTE will provide DTI a list of switches that can provide
                customized routing using line class codes or similar method
                (regardless of current capacity limitations). DTI will return a
                list of these switches ranked in priority order. GTE will return
                to DTI a schedule for customized routing in the switches with
                existing capabilities and capacity.

         12.1.2 Upon written request from DTI, GTE will provide DTI with
                applicable charges, and terms and conditions, for providing OS
                and DA, branding, and Customized Routing.

         12.1.3 Subject to the above provisions, GTE will choose the method of
                implementing customized routing of OS and DA calls.

         12.1.4 The use of customized routing will require the purchase of a
                trunk side port and dedicated facilities between the GTE end
                office and the designated OS/DA platform. The rates for these
                elements will be billed in accordance with Appendix G.

13.      Advanced Intelligent Network Access (AIN). GTE will provide DTI access
         to GTE AIN functionality from GTE's AIN SCP via GTE's local switch or
         DTI's local switch.


                                     VII-8
<PAGE>   60

14.      Nondiscrimination Provision and Support. GTE agrees to provide
         unbundled network elements in a timely manner considering the need and
         volume of requests. GTE will provide unbundled network elements in a
         non-discriminatory manner and shall provide power to such elements on
         the same basis as GTE provides to itself.

15.      Provisioning Intervals. GTE agrees to provide unbundled network
         elements in a timely manner considering the need and volume of
         requests, pursuant to agreed upon service provisioning intervals.

16.      Directory Assistance Listing. When DTI orders an unbundled port, a
         Directory Service Request (DSR) must be submitted to have the listing
         included in GTE's Directory Assistance database. The applicable
         ordering charge will be applied for processing the DSR.


                                     VII-9
<PAGE>   61

                                  ARTICLE VIII
            ADDITIONAL SERVICES AND COORDINATED SERVICE ARRANGEMENTS

1.       Bona Fide Request Process.

1.1      Intent. The Bona Fide Request process is intended to be used when DTI
         requests customized Service Orders for certain services, features,
         capabilities or functionality defined and agreed upon by the Parties as
         services to be ordered as Bona Fide Requests.

1.2      Process.

  1.2.1  A Bona Fide Request shall be submitted in writing by DTI and shall
         specifically identify the need to include technical requirements, space
         requirements and/or other such specifications that clearly define the
         request such that GTE has sufficient information to analyze and prepare
         a response.

  1.2.2  Although not expected to do so, DTI may cancel a Bona Fide Request in
         writing at any time prior to DTI and GTE agreeing to price and
         availability. GTE will then cease analysis of the request.

  1.2.3  Within two (2) Business Days of its receipt, GTE shall acknowledge in
         writing the receipt of the Bona Fide Request and identify a single
         point of contact and any additional information needed to process the
         request.

  1.2.4  Except under extraordinary circumstances, within ten (10) Business Days
         of its receipt of a Bona Fide Request, GTE shall provide a proposed
         price and availability date, or it will provide an explanation as to
         why GTE elects not to meet DTI's request. If extraordinary
         circumstances prevail, GTE will inform DTI as soon as it realizes that
         it cannot meet the ten (10) Business Day response due date. DTI and GTE
         will then determine a mutually agreeable date for receipt of the
         request.

  1.2.5  Unless DTI agrees otherwise, all proposed prices shall be consistent
         with the pricing principles of the Act, FCC and/or the Commission.
         Payments for services purchased under a Bona Fide Request will be made
         upon delivery, unless otherwise agreed to by DTI, in accordance with
         the applicable provisions of the Agreement.

  1.2.6  Upon affirmative response from GTE, DTI will submit in writing its
         acceptance or rejection of GTE's proposal. If at any time an agreement
         cannot be reached as to the terms and conditions or price of the
         request GTE agrees to meet, the Dispute resolution procedures described
         in Article III herein may be used by a Party to reach a resolution.

2.       Transfer of Service Announcements. For services other than GTE resold
         and ported number services, when an end user customer transfers service
         from one Party to the other Party, and does not retain its original
         telephone number, the Party formerly providing service to the end user
         will provide, upon request and if such service is provided to its own
         customers, a referral announcement on the original telephone number.
         This announcement will provide the new number of the customer and will
         remain in effect for the same time period this service is provided to
         GTE's own end users. For GTE resold and ported number services, GTE
         shall provide an intercept referral on behalf of DTI.

3.       Misdirected Calls. The Parties will employ the following procedures for
         handling any misdirected calls (e.g., Business office, repair bureau,
         etc.).


                                     VIII-1
<PAGE>   62

3.1      To the extent the correct provider can be determined, each Party will
         refer misdirected calls to the proper provider of local exchange
         service. When referring such calls, both Parties agree to do so in a
         courteous manner, at no charge.

3.2      For misdirected repair calls, the Parties will provide their respective
         repair bureau contact number to each other on a reciprocal basis and
         provide the end user the correct contact number.

3.3      In responding to misdirected calls, neither Party shall make
         disparaging remarks about each other, nor shall they use these calls as
         a basis for internal referrals or to solicit end users or to market
         services.

4.       911/E911 Arrangements.

4.1      Description of Service. DTI will install a minimum of two (2) dedicated
         trunks to GTE's 911/E911 selective routers (i.e., 911 tandem offices)
         that serve the areas in which DTI provides Exchange Services, for the
         provision of 911/E911 services and for access to all subtending PSAPs.
         The dedicated trunks shall be, at a minimum, DS-0 level trunks
         configured as a 2-wire analog interface or as part of a digital (1.544
         Mbps) interface in which all circuits are dedicated to 9-1-1 traffic.
         Either configuration shall use CAMA type signaling with multifrequency
         ("MF") tones that will deliver ANI with the voice portion of the call.
         GTE will provide DTI with the appropriate CLLI codes and specifications
         of the tandem office serving area or the location of the primary PSAP
         when there is no 911 routing in that 911 district. If a DTI central
         office serves end users in an area served by more than one (1) GTE
         911/E911 selective router, DTI will install a minimum of two (2)
         dedicated trunks in accordance with this Section to each of such
         911/E911 selective routers or primary PSAP.

4.2      Transport. If DTI desires to obtain transport from GTE to the GTE 911
         selective routers, DTI may purchase such transport from GTE at the
         rates set forth in Appendix H.

4.3      Cooperation and Level of Performance. The Parties agree to provide
         access to 911/E911 in a manner that is transparent to the end user. The
         Parties will work together to facilitate the prompt, reliable and
         efficient interconnection of DTI's systems to the 911/E911 platforms,
         with a level of performance that will provide the same grade of service
         as that which GTE provides to its own end users. To this end, GTE will
         provide documentation to DTI showing the correlation of its rate
         centers to its E911 tandems at rates set forth in Appendix H.

4.4      Basic 911 and E911 General Requirements:

         4.4.1    Basic 911 and E911 provides a caller access to the appropriate
                  emergency service bureau by dialing a 3-digit universal
                  telephone number (911).

         4.4.2    Where GTE has a 911 selective router installed in the network
                  serving the 911 district, GTE shall use subscriber data
                  derived from the Automatic Location Identification/Database
                  Management System (ALI/DMS) to selectively route the 911 call
                  to the Public Safety Answering Point (PSAP) responsible for
                  the caller's location.

         4.4.3    All requirements for E911 also apply to the use of SS7 as a
                  type of signaling used on the interconnection trunks from the
                  local switch to an end office or a selective router.

         4.4.4    Basic 911 and E911 functions provided to DTI shall be at least
                  at parity with the support and services that GTE provides to
                  its subscribers for such similar functionality.

         4.4.5    Basic 911 and E911 access from Local Switching shall be
                  provided to DTI in accordance with the following: 


                                     VIII-2
<PAGE>   63

         4.4.5.1 GTE and DTI shall conform to all state regulations concerning
                 emergency services.

         4.4.5.2 For E911, both DTI and GTE shall use their respective service
                 order processes to update access line subscriber data for
                 transmission to the database management systems. Validation
                 will be done via MSAG comparison listed in Section 4.4.5.5.

         4.4.5.3 If legally required by the appropriate jurisdiction, GTE shall
                 provide or overflow 911 traffic to be routed to GTE Operator
                 Services or, at DTI's discretion, directly to DTI Operator
                 Services.

         4.4.5.4 Basic 911 and E911 access from the DTI local switch shall be
                 provided from GTE to DTI in accordance with the following:
                 

                 4.4.5.4.1    If required by DTI and technically feasible, GTE
                              shall interconnect direct trunks from the DTI
                              network to the E911 PSAP, or to the E911 selective
                              routers as designated by DTI. Such trunks may
                              alternatively be provided by DTI.

                 4.4.5.4.2    In government jurisdictions where GTE has
                              obligations under existing Agreements as the
                              primary provider of the 911 System to the county
                              (i.e., "lead telco"), DTI shall participate in the
                              provision of the 911 System as follows:

                              4.4.5.4.2.1 Each Party shall be responsible for
                                          those portions of the 911 System for
                                          which it has control, including any
                                          necessary maintenance to each Party's
                                          portion of the 911 System.

                              4.4.5.4.2.2 DTI and GTE recognize that the lead
                                          telco in a 911 district has the
                                          responsibility of maintaining the ALI
                                          database for that district. Each
                                          company will provide its access line
                                          subscriber records to the database
                                          organization of that lead telco. DTI
                                          and GTE will be responsible for
                                          correcting errors when notified by
                                          either the 911 district or its
                                          customer, and then submitting the
                                          corrections to the lead telco. Lead
                                          telco database responsibilities are
                                          covered in Section 4.4.5.5 of this
                                          Article.

                              4.4.5.4.2.3 DTI shall have the right to verify the
                                          accuracy of information regarding DTI
                                          customers in the ALI database using
                                          methods and procedures mutually agreed
                                          to by the Parties. The fee for this
                                          service shall be determined based upon
                                          the agreed upon solution.

                 4.4.5.4.3    If a Third Party is the primary service provider
                              to a 911 district, DTI shall negotiate separately
                              with such Third Party with regard to the provision
                              of 911 service to the agency. All relations
                              between such Third Party and DTI are totally
                              separate from this Agreement and GTE makes no
                              representations on behalf of the Third Party.

                 4.4.5.4.4    If DTI or Affiliate is the primary service
                              provider to a 911 district, DTI and GTE shall
                              negotiate the specific provisions necessary for


                                     VII-3
<PAGE>   64

                              providing 911 service to the agency and shall
                              include such provisions in an amendment to this
                              Agreement.

                 4.4.5.4.5    Interconnection and database access shall be at
                              rates as set forth in Appendix H.

                 4.4.5.4.6    GTE shall comply with established, competitively
                              neutral intervals for installation of facilities,
                              including any collocation facilities, diversity
                              requirements, etc.

                 4.4.5.4.7    In a resale situation, where it may be appropriate
                              for GTE to update the ALI database, GTE shall
                              update such database with DTI data in an interval
                              no less than is experienced by GTE subscribers, or
                              than for other carriers, whichever is faster, at
                              no additional cost.

         4.4.5.5 The following are Basic 911 and E911 Database Requirements:

                 4.4.5.5.1    The ALI database shall be managed by GTE, but is
                              the property of GTE and any participating LEC or
                              DTI which provides their records to GTE.

                 4.4.5.5.2    Copies of the MSAG shall be provided within five
                              (5) business days after the date the request is
                              received and provided on diskette or paper copy at
                              the rates set forth in Appendix H.

                 4.4.5.5.3    DTI shall be solely responsible for providing DTI
                              database records to GTE for inclusion in GTE's ALI
                              database on a timely basis.

                 4.4.5.5.4    GTE and DTI shall arrange for the automated input
                              and periodic updating of the E911 database
                              information related to DTI end users. GTE shall
                              work cooperatively with DTI to ensure the accuracy
                              of the data transfer by verifying it against the
                              Master Street Address Guide ("MSAG"). GTE shall
                              accept electronically transmitted files or
                              magnetic tape that conform to National Emergency
                              Number Association ("NENA") Version #2 format.

                 4.4.5.5.5    DTI shall assign an E911 database coordinator
                              charged with the responsibility of forwarding DTI
                              end user ALI record information to GTE or via a
                              third-party entity, charged with the
                              responsibility of ALI record transfer. DTI assumes
                              all responsibility for the accuracy of the data
                              that DTI provides to GTE.

                 4.4.5.5.6    GTE shall update the database within one (1)
                              business day of receiving the data from DTI. If
                              GTE detects an error in the DTI provided data, the
                              data shall be returned to DTI within one day from
                              when it was provided to GTE. DTI shall respond to
                              requests from GTE to make corrections to database
                              record errors by uploading corrected records
                              within one day. Manual entry shall be allowed only
                              in the event that the system is not functioning
                              properly.

                 4.4.5.5.7    GTE agrees to treat all data on DTI subscribers
                              provided under this Agreement as strictly
                              confidential and to use data on DTI subscribers
                              only for the purpose of providing E911 services.


                                     VIII-4
<PAGE>   65

                 4.4.5.5.8    GTE shall adopt use of a Carrier Code (NENA
                              standard five-character field) on all ALI records
                              received from DTI. The Carrier Code will be used
                              to identify the carrier of record in NP
                              configurations. The NENA Carrier Code for DTI is
                              "DTI"; the NENA Carrier Code for GTE is "GTE."

         4.4.5.6 GTE and DTI will comply with the following requirements for
                 network performance, maintenance and trouble notification.

                 4.4.5.6.1    Equipment and circuits used for 911 shall be
                              monitored at all times. Monitoring of circuits
                              shall be done to the individual trunk level.
                              Monitoring shall be conducted by GTE for trunks
                              between the selective router and all associated
                              PSAPs.

                 4.4.5.6.2    Repair service shall begin immediately upon report
                              of a malfunction. Repair service includes testing
                              and diagnostic service from a remote location,
                              dispatch of or in-person visit(s) of personnel.
                              Where an on-site technician is determined to be
                              required, a technician will be dispatched without
                              delay.

                 4.4.5.6.3    GTE shall notify DTI forty-eight (48) hours in
                              advance of any scheduled testing or maintenance
                              affecting DTI 911 service. GTE shall provide
                              notification as soon as possible of any
                              unscheduled outage affecting DTI 911 service.

                 4.4.5.6.4    All 911 trunks must be capable of transporting
                              Baudot Code necessary to support the use of
                              Telecommunications Devices for the Deaf
                              ("TTY/TDDs").

         4.4.5.7 Basic 911 and E911 Additional Requirements

                 4.4.5.7.1    All DTI lines that have been ported via INP shall
                              reach the correct PSAP when 911 is dialed. Where
                              GTE is the lead telco and provides the ALI, the
                              ALI record will contain both the DTI number and
                              GTE ported number. The PSAP attendant shall see
                              both numbers where the PSAP is using a standard
                              ALI display screen and the PSAP extracts both
                              numbers from the data that is sent. GTE shall
                              cooperate with DTI to ensure that 911 service is
                              fully available to all DTI end users whose
                              telephone numbers have been ported from GTE,
                              consistent with State provisions.

                 4.4.5.7.2    DTI and GTE shall be responsible for reporting all
                              errors, defects and malfunctions to one another.
                              GTE and DTI shall provide each other with a point
                              of contact for reporting errors, defects, and
                              malfunctions in the service and shall also provide
                              escalation contacts.

                 4.4.5.7.3    DTI may enter into subcontracts with third
                              parties, including DTI Affiliates, for the
                              performance of any of DTI's duties and obligations
                              stated herein.

                 4.4.5.7.4    Where GTE is the lead telco, GTE shall provide DTI
                              with notification of any pending selective router
                              moves within at least ninety (90) days in
                              advance..


                                     VIII-5
<PAGE>   66

                              4.4.5.7.5    Where GTE is the lead telco, GTE 
                                           shall establish a process for the
                                           management of NPA splits by  
                                           populating the ALI database with the
                                           appropriate new NPA codes. 

                              4.4.5.7.6    Where GTE is the lead telco, GTE 
                                           shall provide the ability for
                                           DTI to update 911 database with  end
                                           user information for lines that have
                                           been  ported via INP or LNP.

         4.4.6   Basic 911 and E911 Information Exchanges and interfaces. Where
                 GTE is the lead telco:

                 4.4.6.1      GTE shall provide DTI access to the ALI Gateway
                              which interfaces to the ALI/DMS database. GTE
                              shall provide error reports from the ALI/DMS
                              database to DTI within one (1) day after DTI
                              inputs information into the ALI/DMS database.
                              Alternately, DTI may utilize GTE or a Third Party
                              entity to enter subscriber information into the
                              database on a demand basis, and validate
                              subscriber information on a demand basis. The
                              rates are set forth in Appendix H.

                 4.4.6.2      GTE and DTI shall arrange for the automated input
                              and periodic updating of the E911 database
                              information related to DTI end users. GTE shall
                              work cooperatively with DTI to ensure the accuracy
                              of the data transfer by verifying it against the
                              Master Street Address Guide ("MSAG"). GTE shall
                              accept electronically transmitted files or
                              magnetic tape that conform to National Emergency
                              Number Association ("NENA") Version #2 format.

                 4.4.6.3      Updates to MSAG. Upon receipt of an error
                              recording an DTI subscriber's address from GTE,
                              and where GTE is the lead telco, it shall be the
                              responsibility of DTI to ensure that the address
                              of each of its end users is included in the Master
                              Street Address Guide ("MSAG") via information
                              provided on DTI's Local Service Request ("LSR") or
                              via a separate feed established by DTI pursuant to
                              Section 4.4.5.7 of this Article.

                 4.4.6.4      The ALI database shall be managed by GTE, but is
                              the property of GTE and all participating
                              telephone companies. The interface between the
                              E911 Switch or Tandem and the ALI/DMS database for
                              DTI subscriber shall meet industry standards.

4.5      Compensation. In situations in which GTE is responsible for maintenance
         of the 911/E911 database and can be compensated for maintaining DTI's
         information by the municipality, GTE will seek such compensation from
         the mulicipality. GTE will seek compensation from DTI only if, and to
         the extent, that GTE is unable to obtain such compensation from the
         municipality. GTE shall charge DTI a portion of the cost of the shared
         911/E911 selective router as set forth in Appendix H.

5.       Information Services Traffic.

5.1      Routing. Each Party shall route traffic for Information Services (i.e.
         900-976, Internet, weather lines, sports providers, etc.) which
         originates on its network to the appropriate Information Service
         Platform.

5.2      Billing and Collection and Information Service Provider (ISP) 
         Remuneration.

         5.2.1    In the event GTE performs switching of ISP traffic associated
                  with resale or unbundled network elements for DTI, GTE shall
                  provide to DTI GTE's standard call detail records 


                                     VIII-6
<PAGE>   67

                  so as to allow DTI to bill its end users. GTE shall not be 
                  responsible or liable to DTI or ISP for Billing and Collection
                  and/or any receivables of Information Service Providers.

         5.2.2    Notwithstanding and in addition to Article III, Section 24,
                  GTE shall be indemnified and held harmless by CLEC from and
                  against any and all suits, actions, losses, damages, claims,
                  or liability of any character, type, or description, including
                  all expenses of litigation and court cost which may arise as a
                  result of the provisions contained in this Article VIII,
                  Section 5.2.1 supra. The indemnity contained in this section
                  shall survive the termination of this Agreement, for whatever
                  reason.

         5.2.3    GTE agrees to notify DTI in writing within ten (10) working
                  days, by registered or certified mail at DTI's address of any
                  claim made against GTE on the obligations indemnified against
                  pursuant to this Article VIII, Section 5.

         5.2.4    It is understood and agreed that the indemnity provided for in
                  this Article VIII, Section 5 is to be interpreted and enforced
                  so as to provide indemnification of liability to GTE to the
                  fullest extent now or hereafter permitted by law.

5.3      900-976 Call Blocking. GTE shall not unilaterally block 900-976 traffic
         in which GTE performs switching associated with resale or unbundled
         network elements. GTE will block 900-976 traffic when requested to do
         so, in writing, by DTI. DTI shall be responsible for all cost
         associated with the 900-976 call blocking request. GTE reserves the
         right to block any and all calls which may harm or damage its network.

5.4      Miscellaneous. GTE reserves the right to provide to any Information
         Service Provider a list of any and all Telecommunications Providers
         doing business with GTE.

6.       Telephone Relay Service. Local and intraLATA Telephone Relay Service
         ("TRS") enables deaf, hearing-impaired, or speech-impaired TRS users to
         reach other telephone users. With respect to resold services, DTI's end
         users will have access to the state authorized TRS provider to the
         extent required by the Commission, including any applicable
         compensation surcharges.

7.       Directory Assistance (DA) and Operator Services (OS). Where DTI is
         providing local service with its own switch, upon DTI's request GTE
         will provide to DTI rebranded or unbranded directory assistance
         services and/or operator services pursuant to separate contracts to be
         negotiated in good faith between the Parties. If DTI so requests
         directory assistance services and/or operator services, such contracts
         shall provide for the following:

7.1      Directory Assistance Calls. GTE directory assistance centers shall
         provide number and addresses to DTI end users in the same manner that
         number and addresses are provided to GTE end users. If information is
         provided by an automated response unit ("ARU"), such information shall
         be repeated twice in the same manner in which it is provided to GTE end
         users. Where available, GTE will provide call completion to DTI end
         users in the same manner that call completion is provided to GTE end
         users. GTE will provide its existing services to DTI end users
         consistent with the service provided to GTE end users.

7.2      Operator Services Calls. GTE operator services provided to DTI end
         users shall be provided in the same manner GTE operator services are
         provided to GTE end users. In accordance with GTE practices and at GTE
         rates, GTE will offer to DTI end users collect, person-to-person,
         station-to-station calling, Third Party billing, emergency call
         assistance, calling card services, credit for calls, time and charges,
         notification of the length of call, and real time rating. GTE operators
         shall also have the ability to quote DTI rates upon request but only if
         there is appropriate cost recovery to GTE and to the extent it can be
         provided within the technical limitations of GTE's switches. GTE will
         provide its existing services to DTI end users consistent with the
         service GTE provides to its own end users.


                                     VIII-7
<PAGE>   68

8.       Directory Assistance Listings Information. GTE will include listings in
         its directory assistance database for DTI end users in the same
         geographic area as GTE provides directory assistance for GTE end users
         as specified in Article VI, Section 3.4.

8.1      GTE shall provide to DTI, at DTI's request, for purposes of DTI
         providing DTI-branded directory assistance services to its local
         customers, within sixty (60) Business Days after an order for such tape
         is received, all published DA listings for that specific state via
         magnetic tape. Such listings will be Confidential Information under
         this Agreement and DTI will use the listings only for its directory
         assistance services to its end users. If DTI uses a Third Party
         directory assistance service to its end users, DTI will ensure that
         such Third Party likewise treats the listings as Confidential
         Information under this Agreement, and uses them only for such directory
         assistance. Changes to the DA Listing Information shall be updated on a
         daily basis through the same means used to transmit the initial list.
         DA Listing Information provided shall indicate whether the customer is
         a residence or business customer. The rate to be paid by DTI to GTE
         will be reasonable and mutually agreed upon.

8.2      The Parties will not release DA Listing Information that includes the
         other Party's end user information to Third Parties without the other
         Party's written approval. The other Party will inform the Releasing
         Party if it desires to have the Releasing Party provide the other
         Party's DA Listing Information to the Third Party, in which case, the
         Releasing Party shall provide the other Party's DA Listing Information
         at the same time as the Releasing Party provides the Releasing Party's
         DA Listing Information to the Third Party. The rate to be paid by the
         Releasing Party to the other Party shall be no more than the direct
         costs of compiling such information. The other Party shall be
         responsible for billing the Third Party.

8.3      The Parties will work together to identify and develop procedures for 
         database error corrections.

9.       Directory Listings and Directory Distribution.  DTI will be required to
         negotiate a separate agreement for directory listings and directory
         distribution, except as set forth below, with GTE's directory
         publication company.

         Listings. DTI agrees to supply GTE on a regularly scheduled basis, at
         no charge, and in a mutually agreed upon format (e.g. Ordering and
         Billing Forum developed), all listing information for DTI's subscribers
         who wish to be listed in any GTE published directory for the relevant
         operating area. Listing information will consist of names, addresses
         (including city, state and zip code) and telephone numbers. Nothing in
         this Agreement shall require GTE to publish a directory where it would
         not otherwise do so.

         Listing inclusion in a given directory will be in accordance with GTE's
         solely determined directory configuration, scope, and schedules, and
         listings will be treated in the same manner as GTE's listings.

         Distribution. Upon directory publication, GTE will arrange for the
         initial distribution of the directory to service subscribers in the
         directory coverage area at no charge.

         DTI will supply GTE in a timely manner with all required subscriber
         mailing information including non-listed and non-published subscriber
         mailing information, to enable GTE to perform its distribution
         responsibilities.

10.      Busy Line Verification and Busy Line Verification Interrupt. Each Party
         shall establish procedures whereby its operator assistance bureau will
         coordinate with the operator assistance bureau of the other Party to
         provide Busy Line Verification ("BLV") and Busy Line Verification and
         Interrupt ("BLVI") services on calls between their respective end
         users. Each Party shall route BLV and BLVI inquiries over separate
         inward operator services trunks. Each Party's operator assistance
         bureau will only verify and/or interrupt the call and will not complete
         the call of the end user


                                     VIII-8
<PAGE>   69

         initiating the BLV or BLVI. Each Party shall charge the other for the
         BLV and BLVI services at the rates contained in Appendix F, or if there
         is no applicable rate listed in Appendix F, at the rates in their
         respective tariffs.

11.      SAG. GTE will provide to DTI upon request the Street Address Guide at a
         reasonable charge. Two companion files will be provided with the SAG
         which lists all services and features at all LSOs, and lists services
         and features that are available in a specific LSO.

12.      Dialing Format Changes. GTE will provide reasonable notification to DTI
         of changes to local dialing format, i.e., 7 to 10 digit, by end office.

13.      Operational Support Systems (OSS). GTE shall provide OSS functions to
         DTI for ordering, provisioning and billing that are generally available
         as described in Appendix I attached to this Agreement. DTI shall pay
         GTE for access to GTE's OSS functions consistent with processes defined
         in Appendix I.


                                     VIII-9

<PAGE>   70

                                   ARTICLE IX
                                   COLLOCATION

1.       Physical Collocation. GTE shall provide to DTI physical collocation of
         equipment pursuant to 47 CFR s.51.323 necessary for interconnection
         or for access to unbundled network elements, provided that GTE
         may provide virtual collocation in place of physical collocation,
         or in some cases deny a particular collocation request entirely
         if GTE demonstrates that physical collocation, or perhaps
         even virtual collocation, is not practical because of technical
         reasons or space limitations, as provided in Section 251 (c)(6) of the
         Act. GTE will work with DTI to install collocation arrangements within
         120 calendar days absent extenuating circumstances, GTE will provide
         such collocation for purposes of interconnection or access to
         unbundled network elements pursuant to the terms and conditions in the
         applicable federal and state EIS tariffs.

1.1      Space Planning. In addition to such provisions for space planning and
         reservation as may be set forth in the applicable GTE federal and state
         EIS tariffs, the parties agree to the following terms and conditions.

         1.1.1 GTE has the right to reserve space within its central offices for
               its own use based on a 5-year planning horizon.

         1.1.2 GTE will notify DTI if it plans to build an addition to a central
               office where DTI has collocated facilities, if such addition
               would result in a material increase of space available for
               collocation.

         1.1.3 Should DTI submit to GTE a two-year forecast for space planning
               for collocated facilities in a central office, GTE will, in good
               faith, consider and discuss such forecast with DTI when
               considering space planning or utilization decisions for such
               central office; provided, however that any final space planning
               or utilization decision shall be made by GTE in its sole
               discretion in light of GTE requirements.

         1.1.4 Subject to technical feasibility and space limitations, GTE will
               make available at applicable federal and state EIS tariffs such
               intraoffice facilities as may be necessary to accommodate
               projected volumes of DTI traffic.

1.2      Connection to Customer Loops and Ports. Facilities for cross-connection
         to unbundled loops and ports shall be provided under the applicable GTE
         federal tariff for Special Access Cross Connect, until such time as a
         local tariff applicable to the facilities used for such
         cross-connection is filed.

1.3      Connection to Other Collocated Carriers. Subject to technical
         feasibility and space limitations, DTI may interconnect with other
         carriers collocated at a GTE central office at which DTI has collocated
         facilities; provided, however, that DTI and such other carriers must be
         collocated at the GTE central office for the primary purpose of
         interconnecting with GTE or accessing GTE's unbundled network elements.
         If DTI wants to interconnect with other carriers collocated at a GTE
         central office, DTI must provide GTE with thirty Business Days' prior
         written notice, during which time GTE may elect to provide the
         facilities necessary to accomplish such interconnection. DTI and the
         other collocated carriers may provide the necessary interconnection
         facilities only if GTE elects not to provide such facilities or fails
         to so elect within the thirty day notice period. If GTE elects to
         provide interconnection facilities under this section, GTE will provide
         this cross connection under the GTE federal tariff for Special Access
         Cross Connect, until such time as a local tariff applicable to the
         facilities used for such interconnection facilities is filed.

1.4      Choice of Vendor. DTI may use the vendor of its choice to install,
         maintain and repair equipment within DTI's collocated space. Access by
         the employees, agents or contractors of such vendor 



                                      IX-1
<PAGE>   71

         shall be subject to the same restrictions on access by employees,
         agents or contractors of DTI imposed under the applicable GTE federal
         and state EIS tariffs, including but not limited to certification and
         approval by GTE.

1.5      Monitoring. Subject to technical feasibility and space limitations, DTI
         may extend its own facilities for remote monitoring of its collocated
         equipment to its collocated space. DTI may request that GTE provide the
         facilities necessary for such remote monitoring, at which time GTE and
         DTI will negotiate in good faith the price, terms and conditions of
         remote monitoring by GTE.

1.6      Phone Service. Upon ordering collocated space, DTI may order that its
         collocation cage be provided with plain old telephone service (POTS)
         commencing at such time as GTE has completed construction of the
         collocated space. DTI shall pay separately for any ordered POTS
         service.

1.7      Intraoffice Diversity. At DTI's request, GTE will provide diversity for
         ingress/egress fiber and power cables where such diversity is available
         and subject to technical feasibility and space limitations.

1.8      DTI Proprietary Information. GTE will protect all DTI proprietary
         information to the extent required under non-disclosure agreements
         existing as of the date GTE completes construction of a physical
         collocation space at DTl's request.

1.9      Notification of Modifications. GTE will notify DTI of modifications to
         collocation space in accord with the terms of applicable GTE state and
         federal EIS tariffs. Additionally, GTE shall notify DTI when major
         upgrades are made to the power plants supporting DTI's collocation
         space. The following shall constitute such major upgrades: 

         (a) replacement of a rectifier;

         (b) addition or replacement of a new fusing module;

         (c) addition or replacement of a power distribution unit frame; or

         (d) addition or replacement of modular rectifiers.

1.10     Drawings. When DTI orders collocated space, GTE and DTI will hold a
         GTE/Customer meeting in accord with applicable GTE state and federal
         EIS tariffs. At such meeting, GTE will provide such drawings of GTE's
         central office facility as may be necessary to adequately depict DTI's
         proposed collocation space.

1.11     Construction of Space. GTE will construct DTI's collocation space in
         accord with the terms and conditions set forth in the applicable GTE
         state and federal EIS tariff. Additionally, GTE agrees to the following
         terms and conditions regarding construction of collocated space: 

         1.11.1     Space will be constructed in 100 square foot increments, 
                    and shall be designed so as to prevent unauthorized access.

         1.11.2     a standard 100 square foot cage shall have the following
                    standard features: 

                    (a) eight-foot high, nine gauge chain link panels;

                    (b) three of the panels listed at (a) above shall measure
                        eight by ten feet, the fourth panel shall measure eight 
                        by seven feet;



                                      IX-2
<PAGE>   72

                    (c) the door to the cage shall measure eight by three feet
                        and shall also consist of nine gauge chain link;

                    (d) the cage shall be provided with one padlock set, with
                        GTE retaining one master key;

                    (e) one ac electrical outlet;

                    (f) one charger circuit system;

                    (g) one electrical sub-panel;

                    (h) such additional lighting as may be necessary;

                    (l) one fire detection requirement evaluation;

                    (j) grounding for the cage consistent with COEI.

         1.11.3     Modifications to the standard configuration set forth in
                    Section 1.11.2 can be made on an individual case basis. If
                    modifications are agreed upon and made by the Parties, GTE
                    will work with DTI to implement such additional
                    modifications as may be necessary to ensure that DTI's
                    collocated space is protected from unauthorized access.

         1.11.4     At such time as construction of DTl's collocation space is
                    approximately 50 percent completed, GTE will give DTI
                    notification, and such notification shall include scheduled
                    completion and turnover dates.

         1.11.5     Upon completion of construction of collocated space, GTE
                    will conduct a walk through of the collocated space with
                    DTI. Should DTI note any deviations from the plan agreed
                    upon by GTE and DTI at the customer meeting, and if such
                    deviations were not requested by DTI or not required by law,
                    GTE shall correct such deviations at its own expense within
                    5 Business Days.

1.12     Connection Equipment.  DTI may provision equipment for the connection 
         of DTI termination equipment to GTE equipment using either of the 
         following methods:

         1.12.1     DTI may extend an electrical or optical cable from the
                    terminal within DTI's collocation cage and terminate that
                    cable at GTE's network.

         1.12.2     DTI may install a patch panel within its collocation cage
                    and then hand the cabling to GTE to extend to and have GTE
                    terminate that cable at GTE's network.

1.13     Access to DTI Collocation Space. The terms and conditions of access to
         DTI's collocation space shall be as set forth in applicable GTE state
         and federal EIS tariffs. Additionally, GTE agrees that the following
         terms and conditions shall apply to access: 

         1.13.1     GTE shall implement adequate measures to control access to
                    collocation cages.

         1.13.2     Collocation space shall comply with all applicable fire and
                    safety codes. 

         1.13.3     Doors with removable hinges or inadequate strength shall be
                    monitored by an alarm connected to a manned site. All other
                    alarms monitoring DTI collocation space provided by GTE
                    shall also be connected to a manned site. DTI may, at its
                    option, provide its own intrusion alarms for its collocated
                    space.


                                      IX-3
<PAGE>   73

         1.13.4     GTE shall control janitorial access to collocation cages,
                    and restrict such access to approved and certified
                    employees, agents or contractors.

         1.13.5     GTE shall establish procedures for access to collocation
                    cages by GTE and non-GTE emergency personnel, and shall not
                    allow access by security guards unless such access comports
                    with this section and is otherwise allowed under applicable
                    GTE state and federal EIS tariffs.

         1.13.6     GTE shall retain a master key to DTI's collocation space for
                    use only in event of emergency as detailed in applicable GTE
                    state and federal tariffs. At DTI's option, the Parties
                    shall review key control procedures no more frequently than
                    once in any twelve month period. At any time, DTI may elect
                    to change keys if it suspects key control has been lost,
                    provided, however, that GTE will be provided with a master
                    key in accord with this section.

         1.13.7     Not more frequently than once a year, DTI may audit the
                    security and access procedures and equipment applicable to
                    its collocated space and the central office housing the
                    collocation space. Access by personnel necessary to conduct
                    such an audit shall be limited as set forth in applicable
                    GTE state and federal EIS tariffs. Should DTI identify
                    deficiencies in security and access procedures and equipment
                    as a result of such audit, the cost, terms and conditions of
                    the correction of such deficiencies shall be negotiated in
                    good faith between the parties.

2.       Virtual Collocation. Subject to Section 1 of this Article IX, GTE will
         provide virtual collocation for purposes of interconnection or access
         to unbundled network elements pursuant to the terms and conditions in
         the applicable GTE federal and state EIS tariffs. In addition, GTE
         agrees that the terms and conditions set forth in this Section 2 of
         this Article IX, shall apply to virtual collocation provided to DTI.

2.1      Existing Virtual Collocation. If, on the effective date of this
         Agreement, DTI is virtually collocated in a GTE premise, DTI may (I)
         elect to retain its virtual collocation arrangement in that premise or
         (ii) unless it is not practical for technical reasons or because of
         space limitations, convert its virtual collocation arrangement at that
         premise to physical collocation. If DTI elects the latter option, DTI's
         request shall be treated as a new physical collocation request and DTI
         shall pay GTE at the applicable tariff rates for construction and
         rearrangement of DTI's equipment as well as all applicable tariffed
         physical collocation recurring charges.

2.2      Conversion from Physical to Virtual. Unless it is not practical for
         technical reasons or because of space limitations, DTI may convert a
         physical collocation arrangement to a virtual collocation arrangement.
         DTI's request to do so shall be treated as a new virtual collocation
         request and DTI shall pay GTE at the applicable tariff rates for
         construction and rearrangement of DTI's equipment as well as all
         applicable tariffed virtual collocation recurring charges. If DTI
         elects to change to a virtual collocation arrangement pursuant to this
         section, GTE will not refund previous payments for physical collocation
         received from DTI.

2.3      Vendors. Choice of vendors for equipment used for virtual collocation
         shall be under the terms and conditions set forth in the applicable GTE
         federal and state EIS tariff. Upon request by DTI, GTE shall provide a
         list of locally qualified vendors approved for the type of equipment to
         be collocated.

2.4      Inspection. Upon provision of virtual collocation by GTE, the Parties
         shall agree on a mutually acceptable schedule whereby DTI may inspect
         the equipment in its virtual collocation space.



                                      IX-4

<PAGE>   74

                                    ARTICLE X
               ACCESS TO POLES, DUCTS, CONDUITS AND RIGHTS-OF-WAY


To the extent required by the Act, GTE and DTI shall each afford to the other
access to the poles, ducts, conduits and rights of way it owns or controls on
terms, conditions and prices comparable to those offered to any other entity
pursuant to each Parties tariffs and/or standard agreements. Accordingly, GTE
and DTI shall execute pole attachment and conduit occupancy agreements in the
form set forth in Appendices I and J. 


                                      X-1
<PAGE>   75

IN WITNESS WHEREOF, each Party has executed this Agreement to be effective as of
the date first above written. 


GTE SOUTHWEST INCORPORATED
GTE MIDWEST INCORPORATED                       DIGITAL TELEPORT, INC.
GTE ARKANSAS INCORPORATED



By     /s/ Connie Nicholas                     By  /s/  J. W. Sheehy
   -----------------------------                 -------------------------------
Name   Connie E. Nicholas                       Name     J. W. Sheehy
     ---------------------------                   -----------------------------
Title  Assistant Vice President        
       Wholesale Markets-
       Interconnection                        Title Vice President IC Support
     ---------------------------                    ----------------------------
Date   November 7, 1997                        Date 10/20/97
     ---------------------------                   -----------------------------


                                      X-2
<PAGE>   76


                                   APPENDIX A
                          GTE PERFORMANCE MEASURES (PM)


Pursuant to Article III of this Agreement, the following terms and conditions
shall apply regarding the performance measures set forth in this Appendix A. The
Parties recognize that these performance measures are new and evolving, and as
further evolution is made by GTE, the parties will discuss the changed
procedures, including new standard processes and procedures, if any, for the
purpose of applying them to and incorporating them in this Agreement. 

GTE'S PERFORMANCE MEASURES (PMs) as set forth in this Appendix implement
standards to measure the quality of services supplied by GTE with respect to
pre-ordering, order/provisioning, maintenance and billing that is equivalent in
equality to what GTE provides to itself. GTE's PMs contain measures for both GTE
and DTI with the measures for DTI being considered an essential element for GTE
meeting customer expectations.

GTE's PMs are conditioned upon a 150 order per month minimum requirement as
described below for Service Units, as a threshold for providing Financial
Incentives for certain PMs. The 150 order per month requirement for Service
Units was developed to provide a statistically valid sample size to measure
GTE's performance for DTI in relationship to the level of performance GTE
provides to its own customers. Service Units are defined to include unbundled
loops, unbundled ports, resold local service lines, INP ported numbers, and
interconnection trunks.

GTE will begin recording of performance data in the first full month in which it
receives the first official order from DTI. GTE's report of performance measures
to DTI, however, will begin after 6 months of data recording; i.e., for data
recorded in the seventh full month. Each month's report will then be reported as
a rolling 3-month result (i.e., July's report will actually include May, June,
July data). The calculation of DTI performance will be based on this 3 month
rolling average of actual performance unless otherwise specified.

Reporting will be available monthly, or at a longer interval, as requested by
DTI. The details of report delivery shall be agreed upon between DTI and the
appropriate GTE Account Management group.

FORECASTING PERFORMANCE MEASUREMENT - GTE's PMs are conditioned upon the
requirement, as described more fully below, that DTI submit timely and accurate
forecasts. The Forecasting PM includes provisions that measure the accuracy of
DTl's forecast by comparing forecasted Service Units to ordered Service Units
for the same period.

DTI shall furnish a quarterly forecast of service order volumes and quantities
of resold local services, unbundled network elements, and interconnection trunks
on a State-wide basis, identifying these volumes/quantities by month, for each
month included in the quarter. These forecasts shall be received by GTE at least
one month before the beginning of the quarter covered by the forecast. Should
the first month of the next quarterly forecast be greater than ten (10%) percent
of the last month of the current quarterly forecast, DTI shall notify GTE
promptly of the increased order volume. Notification shall be made to the
appropriate GTE Account Management group in order to allow sufficient "lead
time" to ensure staffing levels are available to support the increased order
volumes.

DTI must agree to comply with the requirements of the Forecasting PM as the
basis for the application of Financial Incentives described below. If DTI
chooses not to comply with the Forecasting PM, Financial Incentives will not
apply. For purposes of applying Financial Incentives the accuracy of forecasts
will be determined at the state level.


                                      A-1
<PAGE>   77

The measurement and reporting of GTE's PMs will still be available as stated
above regardless of DTI's election for the Forecasting PM.

FINANCIAL INCENTIVES - When DTI agrees to the Forecasting PM described above,
Financial Incentives will begin concurrently with reporting of individual DTI
performance data except as specified below for the
Pre-Ordering/Ordering/Provisioning and Interconnection PMs.

Financial Incentives will apply to Maintenance/Repair PMs without restriction
other than DTI's participation in the Forecasting PM.

Financial Incentives will apply to Pre-Ordering/Ordering/Provisioning and
Interconnection PMs subject to DTI's participation in the Forecasting PM and the
required per month ordering threshold. DTI must place a 150 orders per month
minimum for Service Units, by state, for three (3) consecutive months (hereafter
the "150-order requirement"). Once DTI's order volume reaches the "150-order
requirement", a ninety (90) day grace period will begin wherein data will be
accumulated and reviewed. At the end of that ninety (90) day grace period,
applicable Financial Incentives shall apply. The three (3) consecutive months
and the subsequent ninety (90) day grace period may be concurrent with all or
part of the beginning six (6) month period after recording of official data
begins, between initial order activity and the implementation of performance
reporting (i.e., month 7 data).

For purposes of applying Financial Incentives to the Forecasting PM, if DTI's
actual order activity for Service Units in a given month is below the forecast
for that month by more than 10%, Financial Incentives will apply only to the
incremental Service Units that were forecasted but not ordered; i.e., the
difference between the actual quantity ordered and the quantity which reflects
the forecast less 10%.

For purposes of applying Financial Incentives to the
Pre-ordering/Ordering/Provisioning and Interconnection PM, if DTI's actual order
activity for Service Units in a given month exceeds the forecast for that month
by more than 10%, Financial Incentives will not apply.

Average Non-Recurring Charges - The averages are calculated by dividing the sum
of all non-recurring charges applied to service orders issued by DTI to GTE by
the total number of orders or the total number of Service Units ordered. These
calculations will be made by service activity and service category: Business
(Single/Multi-line, Centranet, PBX, Trunks), Residence, etc. The average
Non-Recurring Charges will be separately calculated for field work and non-field
work orders. These averages and a weighting factor for field and non-field work
will be calculated during a study period to be mutually agreed between the
Parties. The initial average Non-Recurring Charge calculation will occur within
three (3) months of DTI's initial issuance of official orders. The average
Non-Recurring Charge shall be recalculated annually as mutually agreed between
the Parties.

Average Recurring Charges - The averages are calculated by
dividing the sum of all recurring charges applied to service orders issued by
DTI to GTE by the total number of orders or Service Units ordered. These
averages will be calculated during a study period to be mutually agreed between
the Parties. These calculations will be made by service activity and service
category, Business, Residence, etc. The initial average Recurring Charge
calculation will occur within three (3) months of DTI's initial issuance of
official orders. The average Recurring Charges shall be recalculated annually as
mutually agreed between the Parties.


                                      A-2
<PAGE>   78
              GTE PERFORMANCE MEASURES WITH FINANCIAL INCENTIVES

                      PRE-ORDERING/ORDERING/PROVISIONING
<TABLE>
<CAPTION>
- ---------------------------------------------------------------------------------------------------------------------
  ISSUE NO.       OBLIGATION       DATA LEVEL          PERFORMANCE             QUALITY               FINANCIAL
                                                       MEASURE(PM)             STANDARD              INCENTIVE
- ---------------------------------------------------------------------------------------------------------------------
<S>            <C>             <C>                <C>                    <C>                   <C> 
1               GTE             National          Prompt transmission    85% of CSR's sent     5% of average NRC
                                                  of Customer Service    to DTI by the close   incurred by DTI for
                                                  Record (CSR)           of business on        the number of CSR's
                                                  Information            business day          for which the
                                                                         following receipt     Quality Standard is
                                                                         of request            not met in the
                                                                                               reported month
- ---------------------------------------------------------------------------------------------------------------------
2               GTE             National          Prompt transmission    85% of LSC's sent     20% of average NRC
                                                  of Local Service       to DTI by the close   incurred by DTI for
                                                  Confirmation (LSC)     of business on        the lines ordered
                                                                         business day          for which GTE failed
                                                                         following receipt     to meet the Quality
                                                                         of request            Standard in the
                                                                                               reported month
- ---------------------------------------------------------------------------------------------------------------------
3               GTE             State             Due Date commitments   Percent of DTI        Waiver of the
                                                  met                    customer install,     average NRC     
                                                                         transfer, and         installation charges
                                                                         change service        for the number of
                                                                         orders for which      lines by which GTE
                                                                         service is            fails to meet the
                                                                         installed by close    Quality Standard in
                                                                         of business on the    the reported month
                                                                         committed due date                 
                                                                         is not more than                  
                                                                         2.5% below the                             
                                                                         percent of GTE                         
                                                                         customer install,                        
                                                                         transfer, and                          
                                                                         change service                           
                                                                         orders              
- ---------------------------------------------------------------------------------------------------------------------
</TABLE>

                                      A-3

<PAGE>   79
<TABLE>
<CAPTION>
- ---------------------------------------------------------------------------------------------------------------------
  ISSUE NO.       OBLIGATION       DATA LEVEL          PERFORMANCE             QUALITY               FINANCIAL
                                                       MEASURE(PM)             STANDARD              INCENTIVE
- ---------------------------------------------------------------------------------------------------------------------
<S>             <C>            <C>                <C>                  <C>                     <C>  
4               GTE             State              % reporting trouble   Percent of DTI        One month's average    
                                                   within 30 days of     customer install,     MRC per trouble        
                                                   the date installed    transfer, and         report exceeding the   
                                                                         change service        Quality Standard in    
                                                                         orders which are      the reported month     
                                                                         followed by a         (not to exceed one     
                                                                         customer trouble      month's credit per     
                                                                         report within 30      customer line month)   
                                                                         days of service
                                                                         order completion
                                                                         date is not more
                                                                         than 2.5% worse
                                                                         than the percent
                                                                         GTE customer
                                                                         install, transfer,                           
                                                                         and change service                           
                                                                         orders which are                             
                                                                         followed by a                                
                                                                         customer trouble                             
                                                                         report within 30                             
                                                                         days of service                              
                                                                         order completion                             
- ---------------------------------------------------------------------------------------------------------------------
5               GTE             State             Service Order          80% of LSR's          Payment by DTI to
                                                  discrepancy:  LSR's    initiated by DTI's    GTE equal to 20% of
                                                  issued without         do not contain an     the average NRC
                                                  material errors        order discrepancy     installation charges
                                                                         or error:  90% in     for the number of
                                                                         12 months.  Final     lines which DTI
                                                                         target - 95%          fails to meet the
                                                                                               Quality Standard in
                                                                                               the reported month
- ---------------------------------------------------------------------------------------------------------------------
</TABLE>

                                      A-4

<PAGE>   80
                                INTERCONNECTION
<TABLE>
<CAPTION>
- ---------------------------------------------------------------------------------------------------------------------
  ISSUE NO.       OBLIGATION       DATA LEVEL          PERFORMANCE             QUALITY               FINANCIAL
                                                       MEASURE(PM)             STANDARD              INCENTIVE
- ---------------------------------------------------------------------------------------------------------------------
<S>             <C>            <C>                <C>                  <C>                     <C>  
1               GTE             State             Trunk orders           Percent of trunk      Waiver of 100% of    
                                                  completed on or        orders by DTI         average NRC for      
                                                  before the Committed   completed by GTE on   trunks ordered for   
                                                  Due Date               or before the         which GTE failed to  
                                                                         commitment date is    meet the Quality     
                                                                         not more than 10%     Standard in the      
                                                                         below the percent     reported month       
                                                                         of FG B/D Switched    
                                                                         access orders by      
                                                                         all ordering          
                                                                         companies completed   
                                                                         by GTE on or before   
                                                                         the commitment date   
- ---------------------------------------------------------------------------------------------------------------------
2               GTE             National          Firm Order             Percent of trunk      Waiver of 20%        
                                                  Confirmation (FOC)     orders by DTI         average of average   
                                                  on time delivery       completed by GTE on   NRC installation for 
                                                                         or before the         trunks for which GTE 
                                                                         commitment date is    failed to meet the   
                                                                         not more than 5%      Quality Standard in  
                                                                         below the percent     the reported month   
                                                                         of FG B/D Switched    
                                                                         access by all         
                                                                         ordering companies    
                                                                         for which GTE sends   
                                                                         FOC (within 5 days,   
                                                                         or longer, as         
                                                                         requested by DTI)     
- ---------------------------------------------------------------------------------------------------------------------
</TABLE>


                                     A-5

<PAGE>   81

<TABLE>
<CAPTION>
- ----------------------------------------------------------------------------------------------------------------
  ISSUE NO.       OBLIGATION       DATA LEVEL          PERFORMANCE             QUALITY               FINANCIAL
                                                       MEASURE(PM)             STANDARD              INCENTIVE
- ----------------------------------------------------------------------------------------------------------------
<S>             <C>            <C>                 <C>                 <C>                     <C>  
3               DTI             National          Service Order          80% of ASR's          Charge equal to 20%
                                                  discrepancy:  ASR's    initiated by DTI do   of average NRC
                                                  issued without         not contain           installation of
                                                  material errors        material error or     trunks ordered for
                                                                         result in             which DTI failed to
                                                                         discrepancy; 90% in   meet the Quality
                                                                         12 months.  Final     Standard in the
                                                                         target 95%            reported month
- ----------------------------------------------------------------------------------------------------------------
</TABLE>







                                      A-6

<PAGE>   82
                              MAINTENANCE/REPAIR

<TABLE>
<CAPTION>
- ---------------------------------------------------------------------------------------------------------------------
  ISSUE NO.       OBLIGATION       DATA LEVEL          PERFORMANCE             QUALITY               FINANCIAL
                                                       MEASURE(PM)             STANDARD              INCENTIVE
- ---------------------------------------------------------------------------------------------------------------------
<S>             <C>             <C>                <C>                 <C>                      <C> 
1               GTE             State             Percent Commitments    Percent of DTI        One month's flat         
                                                  Met                    customer Network      rate average MRC per     
                                                                         trouble reports       line out of service      
                                                                         where commitment      for which Quality        
                                                                         was meet more than    Standard is not met      
                                                                         2.5% worse than the   in the reported month    
                                                                         percent of GTE's
                                                                         customer Network
                                                                         trouble reports       
                                                                         where commitment      
                                                                         was met (excluding    
                                                                         reports which are     
                                                                         cleared CPE, DTI      
                                                                         customer error)       
- ---------------------------------------------------------------------------------------------------------------------
2               GTE             State             Average clearing       Average repair time   One month's flat      
                                                  time - Out of          (total number of      rate average MRC per  
                                                  Service (OOS) -        elapsed hours/        line OOS for which    
                                                  Designed               minutes for OOS DTI   Quality Standard is   
                                                                         customer Network      not met in the        
                                                                         trouble reports       reported month        
                                                                         divided by total
                                                                         number OOS customer
                                                                         Network trouble
                                                                         reports) for DTI
                                                                         customers is more     
                                                                         than 10% of the       
                                                                         average repair time   
                                                                         for GTE customers     
                                                                         (includes only        
                                                                         "Designed" services) 
- ---------------------------------------------------------------------------------------------------------------------
</TABLE>

                                      A-7

<PAGE>   83
<TABLE>
<CAPTION>
- -------------------------------------------------------------------------------------------------------------------
ISSUE NO.       OBLIGATION       DATA LEVEL            PERFORMANCE             QUALITY               FINANCIAL
                                                       MEASURE(PM)             STANDARD              INCENTIVE
- -------------------------------------------------------------------------------------------------------------------
<S>             <C>             <C>               <C>                   <C>                    <C> 
3               GTE             State             Average clearing       Average repair time   One month's flat        
                                                  time - Out of          (total number of      rate average MRC per    
                                                  Service (OOS) -        elapsed               line OOS for which      
                                                  Non-Designed           hours/minutes for     Quality Standard is     
                                                                         OOS DTI customer      not met in the          
                                                                         Network trouble       reported month          
                                                                         reports divided by
                                                                         total number OOS
                                                                         customer Network
                                                                         trouble reports)
                                                                         for DTI customers
                                                                         is more than 10% of
                                                                         the average repair
                                                                         time for GTE          
                                                                         customers (includes   
                                                                         only POTS and         
                                                                         circuits which do     
                                                                         not require a         
                                                                         design)               
- -------------------------------------------------------------------------------------------------------------------
4               GTE             State             Percent reports per    Percent of DTI        Within six (6)
                                                  100 (Failure           customers making      months of effective
                                                  Frequency)             trouble reports       date, GTE will have
                                                                         (total number of      established a
                                                                         DTI customer          minimum access line
                                                                         Network trouble       threshold.
                                                                         reports divided by 
                                                                         the total access   
                                                                         lines multiplied by
                                                                         100) is not worse  
                                                                         than .5 percent       One month's flat
                                                                         points of the         rate average MRC per
                                                                         percentage of GTE     line OOS for which
                                                                         customers making      Quality Standard is
                                                                         trouble reports       not met in the
                                                                                               reported month.
- -------------------------------------------------------------------------------------------------------------------
</TABLE>


                                      A-8

<PAGE>   84
<TABLE>
<CAPTION>
- --------------------------------------------------------------------------------------------------------------------
  ISSUE NO.       OBLIGATION       DATA LEVEL          PERFORMANCE             QUALITY               FINANCIAL
                                                       MEASURE(PM)             STANDARD              INCENTIVE
- --------------------------------------------------------------------------------------------------------------------
<S>             <C>             <C>               <C>                   <C>                    <C> 
5               GTE             State             Percent repeat         Percent of DTI        One month's flat     
                                                  reports in 30 days     customer repeat       rate average MRC per 
                                                                         trouble reports       line OOS for which   
                                                                         (total number of      Quality Standard is  
                                                                         DTI customer          not met in the       
                                                                         Network trouble       reported month       
                                                                         reports which had a
                                                                         previous Network
                                                                         trouble report
                                                                         within the last 30
                                                                         days divided by the
                                                                         total of customer
                                                                         Network trouble
                                                                         reports multiplied    
                                                                         by 100) is not more   
                                                                         than 2.5% worse       
                                                                         than the percent of   
                                                                         GTE customer repeat   
                                                                         trouble reports       
- --------------------------------------------------------------------------------------------------------------------
</TABLE>

**NOTE: OUTAGE CREDITS: LOCAL SERVICE AND UNBUNDLED NETWORK ELEMENTS: OUTAGE
CREDITS APPLY TO INTERRUPTIONS OF LOCAL SERVICES AND UNBUNDLED NETWORK ELEMENTS
IN ACCORDANCE WITH APPLICABLE STATE PUBLIC SERVICE COMMISSION REQUIREMENTS. IF A
LOCAL SERVICE OR UNBUNDLED NETWORK ELEMENT IS INTERRUPTED, DTI WILL BE ENTITLED
TO OUTAGE CREDITS. AN INTERRUPTION PERIOD BEGINS WHEN DTI REPORTS TO GTE THAT A
LOCAL SERVICE OR UNBUNDLED NETWORK ELEMENT IS INTERRUPTED (OR GTE HAS KNOWLEDGE
THAT AN INTERRUPTION HAS OCCURRED THROUGH SERVICE MONITORING OR OTHER MEANS). AN
INTERRUPTION PERIOD ENDS WHEN THE LOCAL SERVICE IS REPAIRED AND RETURNED TO DTI.
A LOCAL SERVICE OR UNBUNDLED NETWORK ELEMENT IS CONSIDERED TO BE INTERRUPTED
WHEN THERE HAS BEEN A LOSS OF CONTINUITY, THE LOCAL SERVICE OR UNBUNDLED NETWORK
ELEMENT DOES NOT OPERATE IN ACCORDANCE WITH THE APPLICABLE SERVICE STANDARDS, OR
IT IS OTHERWISE UNAVAILABLE FOR USE BY DTI. THIS DEFINITION IS NOT INTENDED TO
CONFLICT WITH STATE PUBLIC UTILITY COMMISSION REQUIREMENTS.

                                      A-9

<PAGE>   85


                                 FORECASTING
<TABLE>
<CAPTION>
- -------------------------------------------------------------------------------------------------------------------------
                                                   PERFORMANCE               QUALITY              FINANCIAL
  ISSUE NO.      OBLIGATION      DATA LEVEL       MEASUREMENT(PM)           STANDARD              INCENTIVE
- -------------------------------------------------------------------------------------------------------------------------
<S>          <C>             <C>               <C>                      <C>                    <C> 
1              DTI             State             Service Units            Volume of DTI's       20% of the average
                                                 requirements             Service Units         NRC for the number
                                                 accurately forecast      requirements in a     of service units
                                                 all volumes for each     month is not          below the forecast
                                                 month contained in       greater than 10%      when the actual
                                                 the quarterly report.    below the amount      volumes are
                                                                          forecast by DTI in    greater than
                                                                          it's most recent      10% and less than
                                                                          quarterly forecast    or equal to 30%
                                                                          (which shall have     under forecast.
                                                                          been made not         40% of the average NRC
                                                                          later than 30 days    for the number of     
                                                                          prior to the          service units below   
                                                                          quarter in            the forecast when     
                                                                          question)             the actual volumes    
                                                                                                are greater than 30%  
                                                                                                and less than or      
                                                                                                equal to 40% under    
                                                                                                the forecast.  50%    
                                                                                                of the average NRC    
                                                                                                for the number of     
                                                                                                service units below
                                                                                                the forecast when 
                                                                                                the actual volumes
                                                                                                are over 40% under
                                                                                                the forecast
- -------------------------------------------------------------------------------------------------------------------------
</TABLE>

                                     A-10


<PAGE>   86

                                      
                                  APPENDIX B
                                SERVICE MATRIX
Date
     --------------

<TABLE>
<CAPTION>
           Service Location                              IP                                  Services
 (identified by tandem serving area)          (identified by CLLI code)           (identified by _______________)
- --------------------------------------- -------------------------------------- --------------------------------------
<S>                                          <C>                                 <C>   
           TO BE DETERMINED                       TO BE DETERMINED                       TO BE DETERMINED
</TABLE>


                                      B-1


<PAGE>   87
<TABLE>
<CAPTION>
                                                    GTE SOUTHWEST INC. ARKANSAS
                                                    RESALE PRODUCTS & SERVICES
                                             GTE SOUTHWEST INC GENERAL EXCHANGE TARIFF

                                                                                                                                 
                                                                         BILLING  RESALE  DISCOUNT   RETAIL  AVOIDED  RESALE     
ST    CO   SEC       SERVICE DESCRIPTION                                  TYPE   POSITI0N POSITION    RATE    COST    RATE       
- --    --   ---       -------------------                                 ------- -------- --------   ------  -------  ------
<S>  <C>   <C>   <C>                                                       <C>     <C>      <C>      <C>     <C>      <C>
AR   GTE    6    Basic Local Rate Schedules:                                                        
                                                                                                    
                 Schedule "A" Improved Exchanges/Rate Group 1 (1-3000)                                                          
AR   GTE    6    Business One Party                                         MRC    Yes       Yes     $32.20   $3.84    $28.36   
AR   GTE    6    Business Manual Trunk                                      MRC    Yes       Yes     $40.05   $4.78    $35.27   
AR   GTE    6    Business Automatic Trunk/Two Way                           MRC    Yes       Yes     $40.05   $4.78    $35.27   
AR   GTE    6    Business Automatic Trunk/One Way In                        MRC    Yes       Yes     $40.05   $4.78    $35.27   
AR   GTE    6    Business Automatic Trunk/One Way Out                       MRC    Yes       Yes     $40.05   $4.78    $35.27   
AR   GTE    6    Customer Owned Pay Telephone                               MRC    Yes       No      $32.20   N/A      $32.20   
AR   GTE    6    Coin Line                                                  MRC    Yes       No      $37.75   N/A      $37.75   
AR   GTE    6    Residence One Party                                        MRC    No        No      $15.25   N/A       N/A     
AR   GTE    6    Residence Manual Trunk                                     MRC    No        No      $15.25   N/A       N/A     
            6    Schedule "A" Improved Exchanges/Rate                                                                            
                   Group II (3001-18,000)                                                                                       
AR   GTE    6    Business One Party                                         MRC    Yes       Yes     $36.20   $4.32    $31.88   
AR   GTE    6    Business Manual Trunk                                      MRC    Yes       Yes     $45.75   $5.46    $40.29   
AR   GTE    6    Business Automatic Trunk/Two Way                           MRC    Yes       Yes     $45.75   $5.46    $40.29   
AR   GTE    6    Business Automatic Trunk/One Way In                        MRC    Yes       Yes     $45.75   $5.46    $40.29   
AR   GTE    6    Business Automatic Trunk/One Way Out                       MRC    Yes       Yes     $45.75   $5.46    $40.29   
AR   GTE    6    Coin Line                                                  MRC    Yes       No      $41.75   N/A      $41.75   
AR   GTE    6    Customer Owned Pay Telephone                               MRC    Yes       No      $36.20   N/A      $36.20   
AR   GTE    6    Residence One Party                                        MRC    No        No      $16.90   N/A       N/A     
AR   GTE    6    Residence Manual Trunk                                     MRC    No        No      $16.90   N/A       N/A     
                                                                                                                                
            6    Schedule "A" Improved Exchanges /J A C K S O N V I L L E                                                       
AR   GTE    6    Business One Party                                         MRC    Yes       Yes     $36.20   $4.32    $31.88   
AR   GTE    6    Business Manual Trunk                                      MRC    Yes       Yes     $45.75   $5.46    $40.29   
AR   GTE    6    Business Automatic Trunk/Two Way                           MRC    Yes       Yes     $45.75   $5.46    $40.29   
AR   GTE    6    Business Automatic Trunk/One Way In                        MRC    Yes       Yes     $45.75   $5.46    $40.29   
AR   GTE    6    Business Automatic Trunk/One Way Out                       MRC    Yes       Yes     $45.75   $5.46    $40.29   
AR   GTE    6    Residence One Party                                        MRC    No        No      $16.90   N/A       N/A     
AR   GTE    6    Coin Line                                                  MRC    Yes       No      $41.75   N/A      $41.75   
AR   GTE    6    Customer Owned Pay Telephone                               MRC    Yes       No      $36.20   N/A      $36.20   
AR   GTE    6    Residence Manual Trunk                                     MRC    No        No      $16.90   N/A       N/A     
            6    Schedule "B" Unimproved Exchanges/                                                                             
                   Rate Group 1 (1-3000) Inside Rate                                                                            
AR   GTE    6    Business One Party                                         MRC    Yes       Yes     $28.20   $3.36    $24.84   
AR   GTE    6    Business Manual Trunk                                      MRC    Yes       Yes     $35.35   $4.22    $31.13   
AR   GTE    6    Business Automatic Trunk/Two Way                           MRC    Yes       Yes     $44.25   $5.28    $38.97   
AR   GTE    6    Business Automatic Trunk/One Way In                        MRC    Yes       Yes     $44.25   $5.28    $38.97   
AR   GTE    6    Business Automatic Trunk/One Way Out                       MRC    Yes       Yes     $44.25   $5.28    $38.97   
AR   GTE    6    Coin Line                                                  MRC    Yes       No      $33.75   N/A      $33.75   
AR   GTE    6    Customer Owned Pay Telephone                               MRC    Yes       No      $36.20   N/A      $36.20   
AR   GTE    6    Residence One Party                                        MRC    No        No      $11.25   N/A       N/A     

</TABLE>

                                    Page 1
<PAGE>   88
<TABLE>
<CAPTION>

                                                    GTE SOUTHWEST INC. ARKANSAS
                                                    RESALE PRODUCTS & SERVICES
                                            GTE SOUTHWEST INC. GENERAL EXCHANGE TARIFF

                                                                                                                                
                                                                    BILLING  RESALE   DISCOUNT    RETAIL     AVOIDED   RESALE 
ST   CO    SEC           SERVICE DESCRIPTION                         TYPE   POSITION  POSITION     RATE       COST      RATE  
- --   --    ---           -------------------                        ------- --------  --------    ------     -------   ------
<S>  <C>   <C>    <C>                                               <C>     <C>       <C>         <C>        <C>       <C>
                                                                                                                               
AR   GTE    6     Residence Manual Trunk                              MRC     No       No         $11.25      N/A       N/A     
AR   GTE    6     Schedule "B" Unimproved Exc./Rate Group II                                                                   
                    (3001-18,000) Inside Rate Base Area                                                                        
AR   GTE    6     Business One Party                                  MRC     Yes      Yes        $32.20      $3.84     $28.36 
AR   GTE    6     Business Manual Trunk                               MRC     Yes      Yes        $40.25      $4.80     $35.45 
AR   GTE    6     Business Automatic Trunk/Two Way                    MRC     Yes      Yes        $54.75      $6.53     $48.22 
AR   GTE    6     Business Automatic Trunk/One Way In                 MRC     Yes      Yes        $54.75      $6.53     $48.22 
AR   GTE    6     Business Automatic Trunk/One Way Out                MRC     Yes      Yes        $54.75      $6.53     $48.22 
AR   GTE    6     Coin Line                                           MRC     Yes      No         $37.75      N/A       $37.75 
AR   GTE    6     Customer Owned Pay Telephone                        MRC     Yes      No         $32.20      N/A       $32.20 
AR   GTE    6     Residence One Party                                 MRC     No       No         $12.90      N/A        N/A   
AR   GTE    6     Residence Manual Trunk                              MRC     No       No         $12.90      N/A        N/A   
            6     Schedule "B" Unimproved Exchanges /                                                                          
                    J A C K S O N V I L L E/Inside Rate Base Area                                                              
AR   GTE    6     Business One Party                                  MRC     Yes      Yes        $32.20      $3.84     $28.36 
AR   GTE    6     Business Manual Trunk                               MRC     Yes      Yes        $40.25      $4.80     $35.45 
AR   GTE    6     Business Automatic Trunk/Two Way                    MRC     Yes      Yes        $40.25      $4.80     $35.45 
AR   GTE    6     Business Automatic Trunk/One Way In                 MRC     Yes      Yes        $40.25      $4.80     $35.45 
AR   GTE    6     Business Automatic Trunk/One Way Out                MRC     Yes      Yes        $40.25      $4.80     $35.45 
AR   GTE    6     Coin Line                                           MRC     Yes      No         $37.75      N/A       $37.75 
AR   GTE    6     Customer Owned Pay Telephone                        MRC     Yes      No         $32.20      N/A       $32.20 
AR   GTE    6     Residence One Party                                 MRC     No       No         $12.90      N/A        N/A   
AR   GTE    6     Residence Manual Trunk                              MRC     No       No         $12.90      N/A        N/A   
            6     Schedule "B" Unimproved Exchanges/                                                                           
                    Rate Group 1 (1-3000) Outside Rate                                                                         
AR   GTE    6     Business One Party                                  MRC     Yes      Yes        $28.20      $3.36     $24.84 
AR   GTE    6     Business Manual Trunk                               MRC     Yes      Yes        $35.35      $4.22     $31.13 
AR   GTE    6     Business Automatic Trunk/Two Way                    MRC     Yes      Yes        $44.25      $5.28     $38.97 
AR   GTE    6     Business Automatic Trunk/One Way In                 MRC     Yes      Yes        $44.25      $5.28     $38.97 
AR   GTE    6     Business Automatic Trunk/One Way Out                MRC     Yes      Yes        $44.25      $5.28     $38.97 
AR   GTE    6     Business Four Party Rural                           MRC     Yes      Yes        $29.20      $3.48     $25.72 
AR   GTE    6     Coin Line                                           MRC     Yes      No         $33.75      N/A       $33.75 
AR   GTE    6     Customer Owned Pay Telephone                        MRC     Yes      No         $28.20      N/A       $28.20 
AR   GTE    6     Residence One Party                                 MRC     No       No         $11.25      N/A        N/A   
AR   GTE    6     Residence Manual Trunk                              MRC     No       No         $11.25      N/A        N/A   
AR   GTE    6     Residence Two Party                                 MRC     No       No         $9.65       N/A        N/A   
            6     Schedule "B" Unimproved Exc./Rate Group II                                                                   
                   (3001-18,000) Outside Rate Base Area                                                                        
AR   GTE    6     Business One Party                                  MRC     Yes      Yes        $32.20      $3.84     $28.36 

</TABLE>

                                    Page 2
<PAGE>   89
<TABLE>
<CAPTION>
                                                                GTE SOUTHWEST INC. ARKANSAS
                                                                RESALE PRODUCTS & SERVICES
                                                        GTE SOUTHWEST INC. GENERAL EXCHANGE TARIFF

                                                                    BILLING     RESALE   DISCOUNT  RETAIL    AVOIDED    RESALE
ST   CO      SEC                 SERVICE DESCRIPTION                  TYPE     POSITION  POSITION   RATE      COST       RATE
<S> <C>      <C>  <C>                                                   <C>       <C>      <C>      <C>        <C>        <C>
                                                                                                                                 
AR    GTE     6    Business Manual Trunk                                 MRC      Yes      Yes     $40.25     $4.80       $35.45 
AR    GTE     6    Business Automatic Trunk/Two Way                      MRC      Yes      Yes     $54.75     $6.53       $48.22 
AR    GTE     6    Business Automatic Trunk/One Way In                   MRC      Yes      Yes     $54.75     $6.53       $48.22 
AR    GTE     6    Business Automatic Trunk/One Way Out                  MRC      Yes      Yes     $54.75     $6.53       $48.22 
AR    GTE     6    Business Four Party Rural                             MRC      Yes      Yes     $33.45     $3.99       $29.46 
AR    GTE     6    Coin Line                                             MRC      Yes      No      $37.75       N/A       $37.75 
AR    GTE     6    Customer Owned Pay Telephone                          MRC      Yes      No      $32.20       N/A       $32.20 
AR    GTE     6    Residence One Party                                   MRC      No       No      $12.90       N/A          N/A 
AR    GTE     6    Residence Manual Trunk                                MRC      No       No      $12.90       N/A          N/A 
AR    GTE     6    Residence Two Party                                   MRC      No       No      $11.00       N/A          N/A 
              6    Schedule "B" Unimproved Exchanges /                                                                           
                     J A C K S O N V I L L E/Outside R                                                                           
AR    GTE     6    Business One Party                                    MRC      Yes      Yes     $32.20     $3.84       $28.36 
AR    GTE     6    Business Manual Trunk                                 MRC      Yes      Yes     $40.25     $4.80       $35.45 
AR    GTE     6    Business Automatic Trunk/Two Way                      MRC      Yes      Yes     $40.25     $4.80       $35.45 
AR    GTE     6    Business Automatic Trunk/One Way In                   MRC      Yes      Yes     $40.25     $4.80       $35.45 
AR    GTE     6    Business Automatic Trunk/One Way Out                  MRC      Yes      Yes     $40.25     $4.80       $35.45 
AR    GTE     6    Business Four Party Rural                             MRC      Yes      Yes     $33.45     $3.99       $29.46 
AR    GTE     6    Coin Line                                             MRC      Yes      No      $37.75       N/A       $37.75 
AR    GTE     6    Customer Owned Pay Telephone                          MRC      Yes      No      $32.20       N/A       $32.20 
AR    GTE     6    Residence One Party                                   MRC      No       No      $12.90       N/A          N/A 
AR    GTE     6    Residence Manual Trunk                                MRC      No       No      $12.90       N/A          N/A 
AR    GTE     6    Residence Two Party                                   MRC      No       No      $11.00       N/A          N/A 
              6    EXTENDED AREA SERVICE RATES                                                                                   
              6    Schedule "A" Improved Exchanges/Rate Group 1                                                                  
                     (1-3000) EAS                                                                                                   
AR    GTE     6    Business Service                                      MRC      Yes      Yes     $ 8.75     $1.04       $ 7.71    
AR    GTE     6    Residence Service                                     MRC      No       No      $ 3.40       N/A          N/A    
              6    Schedule "A" Improved Exchanges/Rate Group II                                                                    
                     (3001-18,000) EAS                                                                                              
AR    GTE     6    Business Service                                      MRC      Yes      Yes     $10.50     $1.25       $ 9.25    
AR    GTE     6    Residence Service                                     MRC      No       No      $ 3.75       N/A          N/A    
              6    Schedule "A" Improved Exchanges /                                                                                
                     J A C K S O N V I L L E     EAS                                                                                
AR    GTE     6    Business Service                                      MRC      Yes      Yes     $13.50     $1.61       $11.89    
AR    GTE     6    Residence Service                                     MRC      No       No      $ 5.75       N/A          N/A    
              6    Schedule "B" Unimproved Exchanges/Rate Group 1                                                                   
                     (1-3000) Inside Rate Base Area     EAS                                                                         
AR    GTE     6    Business One Party                                    MRC      Yes      Yes     $ 8.15     $0.97       $ 7.18    
AR    GTE     6    Business Manual Trunk                                 MRC      Yes      Yes     $10.15     $1.21       $ 8.94    
AR    GTE     6    Business Automatic Trunk/Two Way                      MRC      Yes      Yes     $13.80     $1.65       $12.15    
AR    GTE     6    Business Automatic Trunk/One Way In                   MRC      Yes      Yes     $13.80     $1.65       $12.15    
AR    GTE     6    Business Automatic Trunk/One Way Out                  MRC      Yes      Yes     $13.80     $1.65       $12.15    
AR    GTE     6    Coin Line                                             MRC      Yes      No      $13.70       N/A       $13.70    
AR    GTE     6    Customer Owned Pay Telephone                          MRC      Yes      No      $ 8.15       N/A       $ 8.15    
AR    GTE     6    Residence One Party                                   MRC      No       No      $ 3.25       N/A          N/A    
</TABLE>  
          
                                    Page 3


<PAGE>   90
<TABLE>
<CAPTION>
                                                                GTE SOUTHWEST INC. ARKANSAS
                                                                RESALE PRODUCTS & SERVICES
                                                        GTE SOUTHWEST INC. GENERAL EXCHANGE TARIFF

                                                                        BILLING    RESALE    DISCOUNT   RETAIL   AVOIDED    RESALE  
ST     CO    SEC                 SERVICE DESCRIPTON                      TYPE     POSITION   POSITION    RATE     COST       RATE   
                                                                                                                                   
<S>   <C>    <C>    <C>                                                <C>      <C>         <C>         <C>     <C>       <C>      
AR    GTE     6      Residence Manual Trunk                               MRC       No          No       $ 4.05     N/A       N/A
                                                                                                                                 
AR    GTE     6      Residence Four Party Rural                           MRC       No          No       $ 3.90     N/A       N/A
              6      Schedule "B" Unimproved Exchanges/                                                                          
                       Rate Group II (3001-18000)                                                                                
                       Inside Rate Base Area EAS                                                                                 
AR    GTE     6      Business One Party                                   MRC       Yes        Yes       $ 9.25   $1.10    $ 8.15
AR    GTE     6      Business Manual Trunk                                MRC       Yes        Yes       $11.60   $1.38    $10.22
AR    GTE     6      Business Automatic Trunk/Two Way                     MRC       Yes        Yes       $15.75   $1.88    $13.87
AR    GTE     6      Business Automatic Trunk/One Way In                  MRC       Yes        Yes       $15.75   $1.88    $13.87
AR    GTE     6      Business Automatic Trunk/One Way Out                 MRC       Yes        Yes       $15.75   $1.88    $13.87
AR    GTE     6      Coin Line                                            MRC       Yes         No       $14.80     N/A    $14.80
AR    GTE     6      Customer Owned Pay Telephone                         MRC       Yes         No       $ 9.25     N/A    $ 9.25
AR    GTE     6      Residence One Party                                  MRC        No         No       $ 3.55     N/A       N/A
AR    GTE     6      Residence Manual Trunk                               MRC        No         No       $ 4.65     N/A       N/A
                                                                                                                                 
AR    GTE     6      Residence Four Party Rural                           MRC        No         No       $ 4.40     N/A       N/A
              6      Schedule "B" Unimproved Exchanges/                                                                          
                       Rate Group JACKSONVILLE                                                                                   
AR    GTE     6      Business One Party                                   MRC       Yes        Yes       $10.60   $1.26    $ 9.34
AR    GTE     6      Business Manual Trunk                                MRC       Yes        Yes       $16.40   $1.96    $14.44
AR    GTE     6      Business Automatic Trunk/Two Way                     MRC       Yes        Yes       $16.40   $1.96    $14.44
AR    GTE     6      Business Automatic/One Way In                        MRC       Yes        Yes       $16.40   $1.96    $14.44
AR    GTE     6      Business Automatic/One Way Out                       MRC       Yes        Yes       $16.40   $1.96    $14.44
AR    GTE     6      Coin Line                                            MRC       Yes         No       $16.15     N/A    $16.15
AR    GTE     6      Residence One Party                                  MRC        No         No       $ 5.75     N/A       N/A
AR    GTE     6      Residence Manual Trunk                               MRC        No         No       $ 5.75     N/A       N/A
AR    GTE     6      Customer Owned Pay Telephone                         MRC       Yes         No       $10.60     N/A    $10.60
AR    GTE     6      Residence Four Party Rural                           MRC        No         No       $ 6.05     N/A       N/A
                                                                                                                                 
AR    GTE     6      CENTRAL OFFICE OPERATOR ACCESS TRUNKS                MRC       Yes         No       $35.00     N/A    $35.00
                                                                                                                                 
AR    GTE     6      DIGITAL CENTRAL OFFICE ADDITIVE                      MRC       Yes         No       $ 2.50     N/A    $ 2.50
                                                                                                                                 
                                                                                                                                 
                                                                                                                                 
AR    GTE     8      RETURNED CHECKS     NRC                              NRC        No         No       $15.00     N/A       N/A
AR    GTE     8      MULTIPLE COPIES OF CUSTOMER BILLS/PER BILL           MRC        No         No       $ 1.00     N/A       N/A
                                                                                                                                 
                                                                                                                                 
AR    GTE    12      DIRECTORY LISTINGS                                                                                          
AR    GTE    12      Regular Extra Listing - Residential - Each           MRC        No         No       $ 1.10     N/A       N/A
AR    GTE    12      Regular Extra Listing - Business - Each              MRC        No         No       $ 1.50     N/A       N/A
AR    GTE    12      Alternate Call No. Listings - Residential - Each     MRC        No         No       $ 1.10     N/A       N/A
AR    GTE    12      Alternate Call No. Listings - Business - Each        MRC        No         No       $ 1.50     N/A       N/A
AR    GTE    12      Duplicate Listings - Residential                     MRC        No         No       $ 1.10     N/A       N/A
AR    GTE    12      Duplicate Listings - Business                        MRC        No         No       $ 1.50     N/A       N/A
AR    GTE    12      Extra Lines of information, each line                MRC        No         No       $ 1.50     N/A       N/A
</TABLE> 

                                    Page 4


<PAGE>   91

                          GTE SOUTHWEST INC. ARKANSAS
                          RESALE PRODUCTS & SERVICES
                  GTE SOUTHWEST INC. GENERAL EXCHANGE TARIFF

<TABLE>
<CAPTION>
                                                                    BILLING    RESALE    DISCOUNT      RETAIL   AVOIDED    RESALE 
ST    CO  SEC           SERVICE DEPARTMENT                           TYPE     POSITION   POSITION       RATE      COST      RATE
- --    --  ---           ------------------                           ----     --------   --------       ----      ----      ----
<S>  <C>  <C>   <C>                                                   <C>       <C>         <C>     <C>           <C>    <C>
AR   GTE  12    Foreign Listings - Residential                        MRC        No          No         $1.10      N/A       N/A
AR   GTE  12    Foreign Listings - Business                           MRC        No          No         $1.50      N/A       N/A
AR   GTE  12    Nonlisted Service, each                               MRC        No          No         $1.60      N/A       N/A
AR   GTE  12    Nonpublished Service, each                            MRC        No          No         $1.60      N/A       N/A
AR   GTE  12    Residence Family Plan Directory Listing Svc.          MRC        No          No         $1.10      N/A       N/A

AR   GTE  13    SERVICE CHARGES                                                                                          
AR   GTE  13    Primary Svc. Ord. Chg.-Each - Residence               NRC        No          No        $22.00      N/A       N/A
AR   GTE  13    Primary Svc. Ord. Chg.-Each - Bus & Coin              NRC        No          No        $22.00      N/A       N/A
AR   GTE  13    Primary Svc. Ord. Chg.-Each - key lines/trks          NRC        No          No        $22.00      N/A       N/A
AR   GTE  13    Secondary Svc. Ord. Chg.-Each - Residence             NRC        No          No        $12.00      N/A       N/A
AR   GTE  13    Secondary Svc. Ord. Chg.-Each - Business              NRC        No          No        $12.00      N/A       N/A
AR   GTE  13    Secondary Svc. Ord. Chg.-Each - key/lns/trks          NRC        Yes         No        $12.00      N/A      $12.00
AR   GTE  13    Line Connect Chg.-Each - Residence                    NRC        Yes         No        $14.70      N/A      $14.70
AR   GTE  13    Line Connect Chg.-Each - Business and Coin            NRC        Yes         No        $14.70      N/A      $14.70
AR   GTE  13    Line Connect Chg.-Each - Key Lns/trks                 NRC        Yes         No        $14.70      N/A      $14.70
AR   GTE  13    Trip Charge, Each - Residence                         NRC        Yes         No        $20.00      N/A      $20.00
AR   GTE  13    Trip Charge, Each - Bus & Coin                        NRC        Yes         No        $21.50      N/A      $21.50
AR   GTE  13    Trip Charge, Each - Key Lines and Trunks              NRC        Yes         No        $21.50      N/A      $21.50

          14    MISCELLANEOUS SVCS. AND EQUIPMENT                                                                        
          14                                                                                                             
          14    Automatic Ringdown Circuit                                                                               
AR   GTE  14    One way or two way automatic signalling               NRC        Yes         No        $20.00      N/A      $20.00
AR   GTE  14    One way or two way automatic signalling               MRC        Yes        Yes        $11.75      $1.40    $10.35
          14                                                                                                             
          14    Conference Fire Reporting Systems                                                                        
AR   GTE  14    Fire Reporting Line                                   MRC        Yes         No        $27.25      N/A      $27.25
AR   GTE  14    Each Additional Station bridged in C.O.               MRC        Yes         No         $1.60      N/A       $1.60
          14                                                                                                             
          14    Fire Reporting System - Tellabs                                                                          
AR   GTE  14    Level A/Single Payment Option                         NRC        Yes         No     $6,565.00      N/A   $6,565.00
AR   GTE  14    Level A/5 Year Contract                               MRC        Yes         No       $137.00      N/A     $137.00
AR   GTE  14    Level B                                               MRC        Yes         No        $58.28      N/A      $58.28
AR   GTE  14    Each Additional Level A - Single Pymt.                NRC        Yes         No       $400.00      N/A     $400.00
AR   GTE  14    Each Additional Level A - 5 Yr. contract              MRC        Yes         No         $8.35      N/A       $8.35
AR   GTE  14    Each Additional Level B                               MRC        Yes         No         $2.45      N/A       $2.45

          14    Mileage Charges                                                                                          
AR   GTE  14    One-pty stations, PBX, PABX trunks, each              MRC        Yes        Yes         $1.25      $0.15     $1.10
AR   GTE  14    Two-party stations, each                              MRC        Yes        Yes         $0.95      $0.11     $0.84
          14                                                                                                             
          14    Verification - Operator                                                                                  
AR   GTE  14    Line verify - each occurrence                         MRC        Yes         No         $1.50      N/A       $1.50
          14    
</TABLE>

                                    Page 5

<PAGE>   92
                         GTE SOUTHWEST INC. ARKANSAS
                          RESALE PRODUCTS & SERVICES
                  GTE SOUTHWEST INC. GENERAL EXCHANGE TARIFF

<TABLE>
<CAPTION>


                                                                           BILLING  RESALE   DISCOUNT  RETAIL AVOIDED   RESALE
ST      CO       SEC        SERVICE DESCRIPTION                             TYPE   POSITION  POSITION   RATE    COST     RATE
- ------------------------------------------------------------------------------------------------------------------------------------
<S>    <C>       <C>        <C>                                            <C>      <C>       <C>     <C>     <C>        <C>
AR      GTE       14        Reserved Telephone Number - Each - Bus           MRC     Yes       Yes      $5.00   $0.60      $4.40
AR      GTE       14        Reserved Telephone Number - Each - res           MRC     Yes       Yes      $5.00   $0.60      $4.40
                  14        Special Billing Numbers                                                                
AR      GTE       14        Increments of 1-25 numbers                       MRC      No        No      $3.15    N/A        N/A
                  14                                                                                               
                  14        Interrupt - Local Operator                                                             
AR      GTE       14        Each                                             NRC     Yes        No      $2.50    N/A       $2.50
                  14        Individuline Service                                                                   
AR      GTE       14        Residence NRC                                    NRC     Yes        No     $25.00    N/A      $25.00
AR      GTE       14        Residence MRC                                    MRC     Yes       Yes      $1.50   $0.18      $1.32
AR      GTE       14        Business NRC                                     NRC     Yes        No     $50.00    N/A       $50.00
AR      GTE       14        Business MRC                                     MRC     Yes       Yes      $3.50   $0.42      $3.08
                  14        900 Call Restriction                                                                   
AR      GTE       14        Per line equipped (Business only)   NRC          NRC     Yes        No      $8.00    N/A       $8.00
                  14                                                                                               
                  14        Dial DATALINK Service                                                                  
AR      GTE       14        Business                                         MRC     Yes       Yes      $5.00   $0.60      $4.40
AR      GTE       14        Business                                         NRC     Yes        No     $25.00   N/A       $25.00
AR      GTE       14        Residence                                        MRC     Yes       Yes      $5.00   $0.60      $4.40
AR      GTE       14        Residence                                        NRC     Yes        No     $25.00   N/A       $25.00
                  14        Operator Assisted Local Calls (Svc. Chgs.)                                             
AR      GTE       14        Customer Dialed Calling Card                    USAGE    Yes        No      $0.35   N/A        $0.35
AR      GTE       14        Opr Station to Station - Opr. sent paid,                                               
                              collect, third no, cre. card                  USAGE    Yes        No      $0.90   N/A        $0.90
AR      GTE       14        Person to Person                                USAGE    Yes        No      $2.50   N/A        $2.50
                  14                                                                                               
                  14        Direct Inward Dialing Service                                                          
AR      GTE       14        DID Trunk Terminations (Per Trunk) MRC           MRC     Yes       Yes     $25.00   $2.98     $22.02
AR      GTE       14        DID Trunk Terminations (Per Trunk) NRC           NRC     Yes        No    $150.00   N/A      $150.00
AR      GTE       14        DID Station Numbers-Block of 20 mrc              MRC     Yes       Yes      $8.00   $0.95      $7.05
AR      GTE       14        DID Station Numbers-Block of 100 mrc             MRC     Yes       Yes     $22.00   $2.62     $19.38
                  14        Service Performance Guarantee                                                          
AR      GTE       14        Business                                         NRC      No        No    $100.00   N/A        N/A
AR      GTE       14        Residence                                        NRC      No        No     $25.00   N/A        N/A
                  14        Call Restriction Services                                                              
                  14        Toll Blocking Service                                                                  
AR      GTE       14        Toll blocking option 1 mrc                       MRC     Yes       Yes      $3.00   $0.36      $2.64
AR      GTE       14        Toll blocking option 1 nrc                       NRC     Yes        No     $10.00   N/A       $10.00
AR      GTE       14        Toll blocking Option 2 mrc                       MRC     Yes       Yes      $3.00   $0.36      $2.64
</TABLE>


                                    Page 6

<PAGE>   93
                         GTE SOUTHWEST INC. ARKANSAS
                          RESALE PRODUCTS & SERVICES
                  GTE SOUTHWEST INC. GENERAL EXCHANGE TARIFF


<TABLE>
<CAPTION>
                                                                                BILLING  RESALE  DISCOUNT RETAIL  AVOIDED   RESALE
ST      CO      SEC          SERVICE DESCRIPTION                                 TYPE   POSITION POSITION  RATE    COST      RATE
- ------------------------------------------------------------------------------------------------------------------------------------
<S>     <C>    <C>         <C>                                                     <C>   <C>   <C>       <C>     <C>      <C>
AR      GTE       14        Toll blocking Option 2 nrc                             NRC     Yes     No     $10.00    N/A      $10.00
                  14        Billed Number Screening Service                                                              
AR      GTE       14        Option 1 - collect/3rd No. bill - per line/trunk n      NRC    Yes     No     $10.00    N/A      $10.00
AR      GTE       14        Option 1 - collect/3rd No. bill - per line/trunk m      MRC    Yes    Yes      $3.00    $0.36     $2.64
AR      GTE       14        Option 2 - Third no. billing - per line/trunk n         NRC    Yes     No     $10.00    N/A      $10.00
AR      GTE       14        Option 2 - Third no. billing - per line/trunk m         MRC    Yes    Yes      $3.00    $0.36     $2.64
AR      GTE       14        Option 3 - Collect Billing - per line/trunk - n         NRC    Yes     No     $10.00     N/A     $10.00
AR      GTE       14        Option 3 - Collect Billing - per line/trunk - m         MRC    Yes    Yes      $3.00    $0.36     $2.64
                  14        Selective Class of Call Screening                                                            
AR      GTE       14        Per line equipped                                       MRC    Yes    Yes      $3.00    $0.36     $2.64
AR      GTE       14        Per line equipped                                       NRC    Yes     No     $10.00    N/A      $10.00
AR      GTE       14        Per trunk equipped n                                    NRC    Yes     No     $10.00    N/A      $10.00
AR      GTE       14        Per trunk equipped m                                    MRC    Yes    Yes     $10.00    $1.19     $8.81
                  15        ADDITIONAL EXCHANGE ACCESS FACILITIES                                                        
AR      GTE       15        Mileage Rates - per 1/4mile                             MRC    Yes    Yes      $1.30    $0.16     $1.14
                  15        Off Premises PABX Stations & additional locatns                                              
                  15        Special Loop Treatment                                                                       
AR      GTE       15        Loop Extender - each                                    NRC    Yes     No     $25.00    N/A      $25.00
AR      GTE       15        Loop Extender - each                                    MRC    Yes    Yes      $5.35    $0.64     $4.71
AR      GTE       15        Bridge Lifter, each                                     NRC    Yes     No      $3.00    N/A       $3.00
AR      GTE       15        Bridge Lifter, each                                     MRC    Yes    Yes      $0.40    $0.05     $0.35
AR      GTE       15        VF Repeater - Each                                      NRC    Yes     No     $25.00    N/A      $25.00
AR      GTE       15        VF Repeater - Each                                      MRC    Yes    Yes     $10.25    $1.22     $9.03
AR      GTE       15        Long Line adapter - Each                                NRC    Yes     No     $25.00    N/A      $25.00
AR      GTE       15        Long Line adapter - Each                                MRC    Yes    Yes      $8.75    $1.04     $7.71
                  15                                                                                                     
                  15        Bells-(Ringers)                                                                              
AR      GTE       15        Loop Extender - each                                    NRC    Yes     No     $25.00    N/A      $25.00
AR      GTE       15        Loop Extender - each                                    MRC    Yes    Yes      $5.35    $0.64     $4.71
AR      GTE       15        Bridge Lifter, each                                     NRC    Yes     No      $3.00    N/A       $3.00
AR      GTE       15        Bridge Lifter, each                                     MRC    Yes    Yes      $0.40    $0.05     $0.35
AR      GTE       15        VF Repeater - Each                                      NRC    Yes     No     $25.00    N/A      $25.00
AR      GTE       15        VF Repeater - Each                                      MRC    Yes    Yes     $10.25    $1.22     $9.03
AR      GTE       15        Long Line adapter - Each                                NRC    Yes     No     $25.00    N/A      $25.00
AR      GTE       15        Long Line adapter - Each                                MRC    Yes    Yes      $8.75    $1.04     $7.71
                  15        Conference Bridge                                                                          
AR      GTE       15        20 lines mrc                                            MRC    Yes    Yes    $110.00   $13.12    $96.88
AR      GTE       15        20 lines - 3 yr. minimum terminating liability          NRC    Yes     No  $3,500.00    N/A   $3,500.00
AR      GTE       15        Line equipment per line                                 NRC    Yes     No     $25.00    N/A      $25.00
AR      GTE       15        Line equipment per line                                 MRC    Yes    Yes     $10.65    $1.27     $9.38
</TABLE>

                                    Page 7

<PAGE>   94

                         GTE SOUTHWEST INC. ARKANSAS
                          RESALE PRODUCTS & SERVICES
                  GTE SOUTHWEST INC GENERAL EXCHANGE TARIFF

<TABLE>
<CAPTION>                                                                     
                                                                         BILLING   RESALE    DISCOUNT   RETAIL    AVOIDED    RESALE
ST   CO   SEC             SERVICE DESCRIPTION                              TYPE    POSITION  POSITION    RATE       COST      RATE 
- --   --   ---             -------------------                              ----    --------  --------   -------   -------   -------
<S>  <C>  <C>  <C>                                                         <C>     <C>        <C>      <C>        <C>        <C>   
           15   Tie Lines - INTRAexch. Mileage - Between Pts.                                                                   
AR   GTE   15   Between points - same bldg.                                  NRC      Yes        No      $12.00       N/A    $12.00
AR   GTE   15   Between points - same bldg.                                  MRC      Yes       Yes      $ 1.60     $0.19    $ 1.41
AR   GTE   15   Between points - diff. bldg. - same premise                  NRC      Yes        No      $12.00       N/A    $12.00
AR   GTE   15   Between points - diff. bldg. - same premise                  MRC      Yes       Yes      $ 1.60     $0.19    $ 1.41
AR   GTE   15   Not same prem.-Per1/4mi.                                     NRC      Yes        No      $12.00       N/A    $12.00
AR   GTE   15   Not same prem.-Per1/4mi. - Min.Mth.Chg.$3.00                 MRC      Yes       Yes      $ 1.60     $0.19    $ 1.41
           16   Custom Calling Vertical Services:                                                                                 
AR   GTE   16   TOUCH CALL LN CHRG BUS 1-PTY PER LINE                        MRC      Yes       Yes      $ 2.00     $0.24    $ 1.76
AR   GTE   16   TOUCH CALL LN CHRG BUS 2-PTY PER LINE                        MRC      Yes       Yes      $ 2.00     $0.24    $ 1.76
AR   GTE   16   TOUCH CALL LN CHRG BUS 4-PTY PER LINE                        MRC      Yes       Yes      $ 2.00     $0.24    $ 1.76
AR   GTE   16   TOUCH CALL LN CHRG KEY SYS PER LN                            MRC      Yes       Yes      $ 2.00     $0.24    $ 1.76
AR   GTE   16   TOUCH CALL LN CHRG PBX PER TRK                               MRC      Yes       Yes      $ 2.00     $0.24    $ 1.76
AR   GTE   16   TOUCH CALL LN CHRG RES 1-PTY PER LN                          MRC      Yes       Yes      $ 2.00     $0.24    $ 1.76
AR   GTE   16   TOUCH CALL LN CHRG RES 2-PTY PER LN                          MRC      Yes       Yes      $ 2.00     $0.24    $ 1.76
AR   GTE   16   TOUCH CALL LN CHRG RES 4-PTY PER LN                          MRC      Yes       Yes      $ 2.00     $0.24    $ 1.76
AR   GTE   16   Rotary Hunt Line Service (Per Line)                          MRC      Yes       Yes      $ 3.00     $0.36    $ 2.64
AR   GTE   16   Call Waiting - Business                                      MRC      Yes       Yes      $ 3.50     $0.42    $ 3.08
AR   GTE   16   Call Waiting - Residence                                     MRC      Yes       Yes      $ 3.50     $0.42    $ 3.08
AR   GTE   16   Call Forwarding - Business                                   MRC      Yes       Yes      $ 2.50     $0.30    $ 2.20
AR   GTE   16   Call Forwarding - Residence                                  MRC      Yes       Yes      $ 2.50     $0.30    $ 2.20
AR   GTE   16   Call Forwarding Multipath - Business                         MRC      Yes       Yes      $ 2.50     $0.30    $ 2.20
AR   GTE   16   Call Forwarding Multipath - Residence                        MRC      Yes       Yes      $ 2.50     $0.30    $ 2.20
AR   GTE   16   Speed Call 8 - Business                                      MRC      Yes       Yes      $ 2.50     $0.30    $ 2.20
AR   GTE   16   Speed Call 8 - Residence                                     MRC      Yes       Yes      $ 2.50     $0.30    $ 2.20
AR   GTE   16   Speed Call 30 - Business                                     MRC      Yes       Yes      $ 3.50     $0.42    $ 3.08
AR   GTE   16   Speed Call 30 - Residence                                    MRC      Yes       Yes      $ 3.50     $0.42    $ 3.08
AR   GTE   16   Three Way Calling - One Feature - Business                   MRC      Yes       Yes      $ 3.50     $0.42    $ 3.08
AR   GTE   16   Three Way Calling - One Feature - Residence                  MRC      Yes       Yes      $ 3.50     $0.42    $ 3.08
AR   GTE   16   Last Number Redial and Saved-Number Redial - Business (GF)   MRC      Yes       Yes      $ 3.50     $0.42    $ 3.08
AR   GTE   16   Last Number Redial and Saved-Number Redial - Residence (GF)  MRC      Yes       Yes      $ 3.50     $0.42    $ 3.08
AR   GTE   16   Call Forward/Busy/No Answer - Business (Variable)            MRC      Yes       Yes      $ 3.50     $0.42    $ 3.08
AR   GTE   16   Call Forward/Busy/No Answer - Residence (Variable)           MRC      Yes       Yes      $ 3.50     $0.42    $ 3.08
AR   GTE   16   Smart Ring - One Feature-Business                            MRC      Yes       Yes      $ 6.00     $0.72    $ 5.28
AR   GTE   16   Smart Ring - One Feature - Residence                         MRC      Yes       Yes      $ 6.00     $0.72    $ 5.28
AR   GTE   16   Fixed Call Forwarding/Busy - Business                        MRC      Yes       Yes      $ 1.25     $0.15    $ 1.10
AR   GTE   16   Fixed Call Forwarding/Busy - Residence                       MRC      Yes       Yes      $ 1.25     $0.15    $ 1.10
AR   GTE   16   Fixed Call Forwarding/No Answer - Business                   MRC      Yes       Yes      $ 1.25     $0.15    $ 1.10
AR   GTE   16   Fixed Call Forwarding/No Answer - Residence                  MRC      Yes       Yes      $ 1.25     $0.15    $ 1.10
AR   GTE   16   Fixed Call Forwarding/Busy/No Answer - Business              MRC      Yes       Yes      $ 1.50     $0.18    $ 1.32
AR   GTE   16    Fixed Call Forwarding/Busy/No Answer - Residence            MRC      Yes       Yes      $ 1.50     $0.18    $ 1.32
</TABLE>   


                                    Page 8
<PAGE>   95
                          GTE SOUTHWEST INC. ARKANSAS
                          RESALE PRODUCTS & SERVICES
                  GTE SOUTHWEST INC. GENERAL EXCHANGE TARIFF


<TABLE>
<CAPTION>
                                                                              BILLING   RESALE   DISCOUNT    RETAIL  AVOIDED  RESALE
ST   CO   SEC               SERVICE DESCRIPTION                                TYPE    POSITION  POSITION     RATE    COSTS    RATE
- --   --   ---               -------------------                                ----    --------  --------     ----    -----    ----
<S>  <C>  <C>    <C>                                                            <C>      <C>        <C>     <C>       <C>    <C>
AR   GTE  16   SMARTER Package - Business                                       MRC      Yes       Yes       $6.00    $0.72   $5.28
AR   GTE  16   SMARTER Package - Residence       (GF)                           MRC      Yes       Yes       $5.00    $0.60   $4.40
AR   GTE  16   SMARTEST Package - Business                                      MRC      Yes       Yes       $7.00    $0.84   $6.16
AR   GTE  16   SMARTEST Package - Residence     (GF)                            MRC      Yes       Yes       $6.00    $0.72   $5.28
AR   GTE  16   Smart Ring with a Pac - Business                                 MRC      Yes       Yes       $3.00    $0.36   $2.64
AR   GTE  16   Smart Ring with a Pac - Residence     (GF)                       MRC      Yes       Yes       $3.00    $0.36   $2.64
AR   GTE  16   Remote Call Forwarding - BUS/RES - first access path             MRC      Yes       Yes      $16.00    $1.91  $14.09
AR   GTE  16   Remote Call Forwarding - BUS/RES - 2nd access path               MRC      Yes       Yes      $16.00    $1.91  $14.09
          16   TEL-TEEN SERVICE CUSTOM FEATURE PACKAGES     (GF)                                                             
AR   GTE  16   Touch Call, Three-Way Calling, Speed Call 8, Toll Control (GF)   MRC      Yes       Yes       $3.50    $0.42   $3.08
AR   GTE  16   Touch Call, Call Waiting, Speed Call 8, Toll Control (GF)        MRC      Yes       Yes       $3.00    $0.36   $2.64
AR   GTE  16   Touch Call, Three-Way Calling, Toll Control     (GF)             MRC      Yes       Yes       $2.00    $0.24   $1.76
AR   GTE  16   Touch Call, Call Waiting, Speed Call 8     (GF)                  MRC      Yes       Yes       $3.00    $0.36   $2.64

               CLASS Vertical Services:                                                                                      
AR   GTE  16   Automatic Busy Redial - Business                                 MRC      Yes       Yes       $6.00    $0.72   $5.28
AR   GTE  16   Automatic Busy Redial - Residence                                MRC      Yes       Yes       $5.00    $0.60   $4.40
AR   GTE  16   Automatic Call Return - Business                                 MRC      Yes       Yes       $6.00    $0.72   $5.28
AR   GTE  16   Automatic Call Return - Residence                                MRC      Yes       Yes       $5.00    $0.60   $4.40
AR   GTE  16   Call Trace - Business                                            MRC      Yes       Yes       $6.00    $0.72   $5.28
AR   GTE  16   Call Trace - Residence                                           MRC      Yes       Yes       $5.00    $0.60   $4.40
AR   GTE  16   Call Block - Business                                            MRC      Yes       Yes       $4.00    $0.48   $3.52
AR   GTE  16   Call Block - Residence                                           MRC      Yes       Yes       $3.00    $0.36   $2.64
AR   GTE  16   Special Call Acceptance - Business                               MRC      Yes       Yes       $3.00    $0.36   $2.64
AR   GTE  16   Special Call Acceptance - Residence                              MRC      Yes       Yes       $2.00    $0.24   $1.76
AR   GTE  16   Special Call Forwarding - Business                               MRC      Yes       Yes       $6.00    $0.72   $5.28
AR   GTE  16   Special Call Forwarding - Residence                              MRC      Yes       Yes       $5.00    $0.60   $4.40
AR   GTE  16   Special Call Waiting - Business     (GF)                         MRC      Yes       Yes       $6.00    $0.72   $5.28
AR   GTE  16   Special Call Waiting - Residence     (GF)                        MRC      Yes       Yes       $5.00    $0.60   $4.40
AR   GTE  16   VIP Alert - Business                                             MRC      Yes       Yes       $4.00    $0.48   $3.52
AR   GTE  16   VIP Alert - Residence                                            MRC      Yes       Yes       $3.00    $0.36   $2.64
AR   GTE  16   SmartCall Pak 4400 - Residence     (GF)                          MRC      Yes       Yes       $8.75    $1.04   $7.71
AR   GTE  16   SmartCall Pak 4900 - Residence     (GF)                          MRC      Yes       Yes      $13.25    $1.58  $11.67
AR   GTE  16   Caller ID Number - Business                                      MRC      Yes       Yes       $7.95    $0.95   $7.00
AR   GTE  16   Caller ID Number - Residence                                     MRC      Yes       Yes       $5.95    $0.71   $5.24
AR   GTE  16   Selective Blocking - Business                                    MRC      Yes       Yes       $0.00    $0.00   $0.00
AR   GTE  16   Selective Blocking - Residence                                   MRC      Yes       Yes       $0.00    $0.00   $0.00
AR   GTE  16   Complete Blocking - Residence                                    MRC      Yes       Yes       $0.00    $0.00   $0.00
AR   GTE  16   Complete Blocking - Business                                     MRC      Yes       Yes       $0.00    $0.00   $0.00
AR   GTE  16   Caller ID name and number (Residence)                            MRC      Yes       Yes       $6.90    $0.82   $6.08
AR   GTE  16   Caller ID name and number (Business)                             MRC      Yes       Yes       $8.95    $1.07   $7.88
AR   GTE  16   Anonymous Caller Rejection (Residence)                           MRC      Yes       Yes       $1.00    $0.12   $0.88
AR   GTE  16   Anonymous Caller Rejection (Business)                            MRC      Yes       Yes       $1.00    $0.12   $0.88

          19   FOREIGN EXCHANGE SERVICE                                                                                       
</TABLE>                                                                        
     
                                    Page 9
<PAGE>   96
                         GTE SOUTHWEST INC. ARKANSAS
                          RESALE PRODUCTS & SERVICES
                  GTE SOUTHWEST INC. GENREAL EXCHANGE TARIFF

<TABLE>
<CAPTION>
                                                                          BILLING   RESALE     DISCOUNT   RETAIL  AVOIDED   RESALE 
ST   CO    SEC      SERVICE DESCRIPTION                                     TYPE    POSITION   POSITION    RATE    COST      RATE  
- ---  ---   ---      -------------------                                   ------    --------   --------    ----    ----      ----  
<S>  <C>    <C> <C>                                                        <C>        <C>       <C>       <C>      <C>      <C>   
AR   GTE    19      Four Wire Channel Terminal Equipment                    NRC        Yes       No       $10.00    N/A     $10.00 
AR   GTE    19      Four Wire Channel Terminal Equipment                    MRC        Yes      Yes       $50.00    $5.97   $44.04 
                                                                                                                                   
            19      FOREIGN SWITCHING OFFICE SERVICE                                                       
AR   GTE    19      First 1/4 mi. or fraction                               MRC        Yes      Yes        $2.00    $0.24    $1.76 
AR   GTE    19      Each additional 1/4 mi. or fraction                     MRC        Yes      Yes        $1.00    $0.12    $0.88 
AR   GTE    20      INTRAEXCHANGE PRIVATE LINE SVC. & CHANNELS                                                                     
AR   GTE    20      FULL PERIOD SERVICE                                                                                            
AR   GTE    20      Common Battery Service                                                                                         
AR   GTE    20      Diff. prem. airline, 0-3/4 mi. per channel              NRC        Yes       No        $7.50    N/A      $7.50 
AR   GTE    20      Diff. prem. airline, 0-3/4 mi. per channel              MRC        Yes       No       $13.50    N/A     $13.50
AR   GTE    20      Each add. 1/4 mi. or fraction                           MRC        Yes       No        $4.50    N/A      $4.50 
AR   GTE    20      Between bldgs.-same prem., airline 0-1200 ft.           
                      per channel                                           NRC        Yes       No        $7.50    N/A      $7.50 
AR   GTE    20      Between bldgs.-same prem., airline 0-1200 ft.           
                      per channel                                           MRC        Yes       No        $4.60    N/A      $4.60
AR   GTE    20      Each add. 300 feet or fraction                          MRC        Yes       No        $1.15    N/A      $1.15
AR   GTE    20      Within same bldg. including 2 pts. of term. each        MRC        Yes       No        $2.25    N/A      $2.25 
AR   GTE    20      Additional pts. - same bldg., each                      NRC        Yes       No        $3.75    N/A      $3.75 
AR   GTE    20      Additional pts. - same bldg., each                      MRC        Yes       No        $1.15    N/A      $1.15 
                    Magneto Service                                                                                                
                BETWEEN BLDGS. INCLUDING ONE PT. OF TERM. AT EACH END.                                                             
AR   GTE    20      Diff. prem., airline, 0-3/4 mi. per channel             NRC        Yes       No        $7.50    N/A      $7.50 
AR   GTE    20      Diff. prem., airline, 0-3/4 mi. per channel             MRC        Yes       No        $6.75    N/A      $6.75 
AR   GTE    20      Each additional 1/4 or fraction                         MRC        Yes       No        $2.25    N/A      $2.25 
AR   GTE    20  BETWEEN BUILDINGS-SAME PREMISES, AIRLINE                                                                           
AR   GTE    20      0-1200 feet per channel                                 NRC        Yes       No        $7.50    N/A      $7.50 
AR   GTE    20      0-1200 feet per channel                                 MRC        Yes       No        $2.40    N/A      $2.40 
AR   GTE    20      Each Additional 300 feet or fraction                    MRC        Yes       No        $0.60    N/A      $0.60 
AR   GTE    20      Within same building, including two points of           
                      termination, each.                                    NRC        Yes       No        $7.50    N/A      $7.50 
 
AR   GTE    20      Within same building, including two points of           
                      termination, each.                                    MRC        Yes       No        $2.25    N/A      $2.25
            20      Channels for Miscellaneous Services       
AR   GTE    20      Grade 1 Simplex per channel -0-4/4 mile                 NRC        Yes       No        $7.50    N/A      $7.50 
AR   GTE    20      Grade 1 Simples per channel -0-4/4 mile                 MRC        Yes       No        $9.00    N/A      $9.00 
AR   GTE    20      Grade 1 Simplex Each additional 1/4 mile  
                      or fraction                                           MRC        Yes       No        $2.65    N/A      $2.65 
AR   GTE    20      Grade 1 Duplex 0-2/4 mile                               NRC        Yes       No        $7.50    N/A      $7.50 
AR   GTE    20      Grade 1 Duplex 0-1/4 mile                               MRC        Yes       No        $6.80    N/A      $6.80 
AR   GTE    20      Grade 1 Duplex Each additional 1/4 mile   
                      or fraction                                           MRC        Yes       No        $3.40    N/A      $3.40 
AR   GTE    20      Grade 2 Simplex per channel -0-4/4 mile                 NRC        Yes       No        $7.50    N/A      $7.50 
AR   GTE    20      Grade 2 Simplex per channel -0-4/4 mile                 MRC        Yes       No        $9.00    N/A      $9.00
</TABLE>  

                                    Page 10

<PAGE>   97
                          GTE SOUTHWEST INC. ARKANSAS
                          RESALE PRODUCTS & SERVICES
                     GTE SOUTHWEST GENERAL EXCHANGE TARIFF

<TABLE>
                                                                       BILLING   RESALE     DISCOUNT     RETAIL    AVOIDED   RESALE 
ST    CO      SEC   SERVICE DESCRIPTION                                  TYPE    POSITION   POSITION      RATE      COST      RATE  
- --    --      ---   -------------------                                  ----    --------   --------      ----      ----      ----  
<S>    <C>   <C>   <C>                                                    <C>    <C>         <C>        <C>        <C>       <C>    
AR     GTE    20    Grade 2 Simplex Each additional 1/4 mile or fraction   MRC      Yes       No         $2.25     N/A        $2.25
AR     GTE    20    Grade 2 Duplex 0-2/4 mile                              NRC      Yes       No         $7.50     N/A        $7.50
AR     GTE    20    Grade 2 Duplex 0-1/4 mile                              MRC      Yes       No         $6.80     N/A        $6.80
AR     GTE    20    Grade 2 Duplex Each additional1/4mile or fraction      MRC      Yes       No         $3.40     N/A        $3.40
AR     GTE    20    Grade 3 Simplex 0-3/4 mi.                              MRC      Yes       No         $7.50     N/A        $7.50
AR     GTE    20    Grade 3 Simplex 0-3/4 mi.                              NRC      Yes       No         $6.75     N/A        $6.75
AR     GTE    20    Grade 3 Simplex Each add.1/4mi. or fraction            MRC      Yes       No         $2.25     N/A        $2.25
              20    Local Channels                                                                                                 
AR     GTE    20    Music station to music customer 0-3/4mile              NRC      Yes       No         $7.50     N/A        $7.50
AR     GTE    20    Music station to music customer 0-3/4mile              MRC      Yes       No         $6.75     N/A        $6.75
AR     GTE    20    Music Each add.1/4mi. or fraction thereof              NRC      Yes       No         $2.25     N/A        $2.25
AR     GTE    20    Channel from bridging cust. to music cust.                         
                      per1/4mi. or fraction                                NRC      Yes       No         $7.50     N/A        $7.50
AR     GTE    20    Channel from bridging cust. to music cust.                         
                      per1/4mi. or fraction                                NRC      Yes       No         $2.25     N/A        $2.25
AR     GTE    20    Equilizing charge per channel                          NRC      Yes       No        $15.00     N/A       $15.00
AR     GTE    20    Bridge amplifier - accomodate 50 terminals             NRC      Yes       No         $7.50     N/A        $7.50
AR     GTE    20    Bridge amplifier - accomodate 50 terminals             MRC      Yes       No        $70.50     N/A       $70.50
AR     GTE    20    Bridge amplifier - accomodate 100 terminals            NRC      Yes       No         $7.50     N/A        $7.50
AR     GTE    20    Bridge amplifier - accomodate 100 terminals            MRC      Yes       No        $70.50     N/A       $70.50
AR     GTE    20    Bridge amplifier - accomodate 150 terminals            NRC      Yes       No         $7.50     N/A        $7.50
AR     GTE    20    Bridge amplifier - accomodate 150 terminals            MRC      Yes       No        $79.75     N/A       $79.75
              21    MOBILE TELEPHONE SERVICE                                                                                       
AR     GTE    21    Base Station Service, per unit                         MRC      Yes      Yes        $11.50     $1.37     $10.13
AR     GTE    21    Local exchange access per unit (see Sec. 13                        
                      for svc. ord. charges                                NRC      Yes       No        sec 13     N/A        $0.00
AR     GTE    21    Local msg. chg. - First 5 min. or frac thereafter     USAGE     Yes      Yes         $0.50     $0.06      $0.44
AR     GTE    21    Each minute thereafter                                USAGE     Yes      Yes         $0.10     $0.01      $0.09
                    DIRECTORY ASSISTANCE SERVICE                                                                                    
AR     GTE    38    Customer Dialed Calling Card                          USAGE     Yes       No         $0.35     N/A        $0.35
AR     GTE    38    All other (Opr.assist sent paid,third no.,                         
                      credit card)                                        USAGE     Yes       No         $0.90     N/A        $0.90
AR     GTE    38    One call allowance; Additional calls                  USAGE     Yes       No         $0.40     N/A        $0.40
AR     GTE    38    Directory Connect Plus Service                        USAGE     Yes       No         $0.50     N/A        $0.50
              22    SWITCHED DATA CUSTOMER LINE SERVICES                                                                            
AR     GTE    22    SW Data Cust Ln Svcs - Low Speed Single Ln.            MRC      Yes      Yes        $50.00     $5.97     $44.04
AR     GTE    22    SW Data Cust Ln Svcs - Low Speed Single Ln.                        
                      INSTALL NRC                                          NRC      Yes       No        $50.00     N/A       $50.00
AR     GTE    22    SW Data Cust Ln Svcs - Low Speed CentraNet             MRC      Yes      Yes        $50.00     $5.97     $44.04
AR     GTE    22    SW Data Cust Ln Svcs - Low Speed CentraNet                         
                      INSTALL NRC                                          NRC      Yes       No        $50.00     N/A       $50.00
AR     GTE    22    SW Data Cust Ln Svcs - High Speed Single Ln.           MRC      Yes      Yes        $50.00     $5.97     $44.04
AR     GTE    22    SW Data Cust Ln Svcs - High Speed Single Ln.                       
                      INSTALL NRC                                          NRC      Yes       No        $12.00     N/A       $12.00
AR     GTE    22    SW Data Cust Ln Svcs - High Speed CentraNet            MRC      Yes      Yes        $50.00     $5.97     $44.04
AR     GTE    22    SW Data Cust Ln Svcs - High Speed CentraNet                        
                      INSTALL NRC                                          NRC      Yes       No        $15.00     N/A       $15.00
AR     GTE    22             Central Office Termination                    MRC      Yes      Yes       $150.00    $17.90    $132.11
AR     GTE    22             Central Office Termination INSTALL NRC        NRC      Yes       No       $125.00     N/A      $125.00
</TABLE>      
              
                                    Page 11
<PAGE>   98
                          GTE SOUTHWEST INC. ARKANSAS
                          RESALE PRODUCTS & SERVICES
                  GTE SOUTHWEST INC. GENERAL EXCHANGE TARIFF

<TABLE>
                                                                    BILLING    RESALE    DISCOUNT    RETAIL     AVOIDED     RESALE  
ST     CO      SEC      SERVICE DESCRIPTION                           TYPE    POSITION   POSITION     RATE       COST        RATE   
- --     --      ---      -------------------                         -------   --------   --------     ----       ----        ----   
<S>    <C>   <C>       <C>                                           <C>       <C>        <C>        <C>        <C>        <C>     
AR     GTE      22          Central Office Channelization             MRC        Yes       Yes       $5.00       $0.60       $4.40 
                22      Optional Services                                                                                          
AR     GTE      22          Data Direct Connect                       MRC        Yes       Yes       $1.00       $0.12       $0.88 
AR     GTE      22          Data Closed User Group                    MRC        Yes       Yes       $1.00       $0.12       $0.88 
AR     GTE      22          Voice Option                              MRC        Yes       Yes                   $0.00       $0.00 
AR     GTE      22          Feature Package Data 1000                 MRC        Yes       Yes       $3.00       $0.36       $2.64 
AR     GTE      22      Software Reconfiguration NRC                  NRC        Yes        No      $12.75       N/A        $12.75 
                        Switched Data Network Usage                                                                                
AR     GTE      22      Local call setup                             Usage       Yes       Yes       $0.02       $0.00       $0.02 
AR     GTE      22      Each add. mou - local                        Usage       Yes       Yes       $0.01       $0.00       $0.01 
AR     GTE      22      Band A 1-10 Airline Mi. Set up               Usage       Yes       Yes       $0.03       $0.00       $0.03 
AR     GTE      22      Band B 11-16 Airline Mi. Set up              Usage       Yes       Yes       $0.04       $0.00       $0.04 
AR     GTE      22      Band C 17-22 Airline Mi. Set up              Usage       Yes       Yes       $0.05       $0.01       $0.04 
AR     GTE      22      Band D 23-30 Airline Mi. Set up              Usage       Yes       Yes       $0.06       $0.01       $0.05 
AR     GTE      22      Band E 31-40 Airline Mi. Set up              Usage       Yes       Yes       $0.07       $0.01       $0.06 
AR     GTE      22      Band A 1-10 Airline Mi. each min             Usage       Yes       Yes       $0.03       $0.00       $0.03 
AR     GTE      22      Band B 11-16 Airline Mi. each min            Usage       Yes       Yes       $0.05       $0.01       $0.04 
AR     GTE      22      Band C 17-22 Airline Mi. each min            Usage       Yes       Yes       $0.08       $0.01       $0.07 
AR     GTE      22      Band D 23-30 Airline Mi. each min            Usage       Yes       Yes       $0.09       $0.01       $0.08 
AR     GTE      22      Band E 31-40 Airline Mi. each min            Usage       Yes       Yes      $0.011       $0.01       $0.10 
                        SWITCHED DAT NETWORK USAGE WITH 40% DISCOUNT                                                     
AR     GTE      22      Local call setup                             Usage       Yes       Yes      $0.012      $0.001      $0.011 
AR     GTE      22      Each add. mou - local                        Usage       Yes       Yes      $0.006      $0.001      $0.005 
AR     GTE      22      Band A 1-10 Airline Mi. Set up               Usage       Yes       Yes      $0.018      $0.002      $0.016 
AR     GTE      22      Band B 11-16 Airline Mi. Set up              Usage       Yes       Yes      $0.024      $0.003      $0.021 
AR     GTE      22      Band C 17-22 Airline Mi. Set up              Usage       Yes       Yes      $0.030      $0.004      $0.026 
AR     GTE      22      Band D 23-30 Airline Mi. Set up              Usage       Yes       Yes      $0.036      $0.004      $0.032 
AR     GTE      22      Band E 31-40 Airline Mi. Set up              Usage       Yes       Yes      $0.042      $0.005      $0.037 
AR     GTE      22      Band A 1-10 Airline Mi. each min             Usage       Yes       Yes      $0.018      $0.002      $0.016 
AR     GTE      22      Band B 11-16 Airline Mi. each min            Usage       Yes       Yes      $0.030      $0.004      $0.026 
AR     GTE      22      Band C 17-22 Airline Mi. each min            Usage       Yes       Yes      $0.048      $0.006      $0.042 
AR     GTE      22      Band D 23-30 Airline Mi. each min            Usage       Yes       Yes      $0.054      $0.006      $0.048 
AR     GTE      22      Band E 31-40 Airline Mi. each min            Usage       Yes       Yes      $0.066      $0.008      $0.058 
AR     GTE      23      ANSWER SUPERVISION - PER LINE                 MRC        Yes        No       $5.55       N/A         $5.55 
                26      TELEPHONE SERVICE PRIORITY (TSP) SYSTEM                                                                    
AR     GTE      26      Establishment per access line/circuit         NRC        Yes        No      $14.50       N/A        $14.50 
AR     GTE      26      Restoration priority per access line                                                              
                          or circuit                                  MRC        Yes       Yes       $4.90       $0.58       $4.32 
                27      ANNOUNCEMENT SYSTEM SERVICE                                                                       
AR     GTE      27      Digit -Eater Trunk per trunk                  NRC        Yes        No     $200.00       N/A       $200.00 
                27      Digit -Eater                                  MRC        Yes       Yes       $4.50       $0.54       $3.96 
</TABLE>


                                    Page 12

<PAGE>   99



<TABLE>
<CAPTION>

                     GTE ARKANSAS SOUTHWEST INC. ARKANSAS
                          RESALE PRODUCTS & SERVICES
                  GTE SOUTHWEST INC. GENERAL EXCHANGE TARIFF

                                                                           BILLING   RESALE   DISCOUNT  RETAIL   AVOIDED   RESALE
ST   CO    SEC           SERVICE DESCRIPTION                                TYPE    POSITION  POSITION   RATE     COST      RATE
- --   ---   ---           -------------------                               -------  --------  --------  -----    -------   ------
<S>  <C>   <C>  <C>                                                          <C>     <C>       <C>      <C>      <C>       <C>
           28   NETWORK SERVICES                                             
AR   GTE   28   Cust. Controllable Ring per end user line arranged           MRC     Yes       Yes      $  1.00   $ 0.12   $  0.88
AR   GTE   28   Data Link per link arranged                                  NRC     Yes       No       $500.00      N/A   $500.00
AR   GTE   28   Data Link per link arranged                                  MRC     Yes       Yes      $300.00   $35.79   $264.21
AR   GTE   28   Five Feature Package per end user Line arranged              MRC     Yes       Yes      $  2.75   $ 0.33   $  2.42
AR   GTE   28   Forwarded Call Information Intraoffice per end user          
                line arranged                                                MRC     Yes       Yes      $  1.00   $ 0.12   $  0.88
AR   GTE   28   Msg. Waiting Indication-Audible Per end user line arranged   MRC     Yes       Yes      $  0.50   $ 0.06   $  0.44
AR   GTE   28   Msg. Waiting Audible Ring Burst per end user line arranged   MRC     Yes       Yes      $  1.50   $ 0.18   $  1.32
AR   GTE   28   3 svc. pac - Fixed Call Fwd, Bus/No ans, Msg. wait, Fwd.     
                Call Info.                                                   MRC     Yes       Yes      $  2.00   $ 0.24   $  1.76
AR   GTE   28   Queuing per Line or trunk arranged                           MRC     Yes       Yes      $  1.50   $ 0.18   $  1.32
AR   GTE   28   User Transfer per ln or trunk arranged                       MRC     Yes       Yes      $  1.50   $ 0.18   $  1.32
                                                                             
           47   Centranet Service                                            
AR   GTE   47   Svc. Chgs. - 3-25 lines -line connection chg                 NRC     Yes       No       $  6.30      N/A   $  6.30
AR   GTE   47   Svc. Chgs. - 26-50 lines -line connection chg                NRC     Yes       No       $  3.09      N/A   $  3.09
AR   GTE   47   Svc. Chgs. - 51-100 lines -line connection chg               NRC     Yes       No       $  2.32      N/A   $  2.32
                                                                             
           47   Centranet Service Line                                       
AR   GTE   47   Month to Month - 3-25 lns, per line                          MRC     Yes       Yes      $ 16.75   $ 2.00   $ 14.75
AR   GTE   47   Month to Month - 26-50 lns, per line                         MRC     Yes       Yes      $ 16.50   $ 1.97   $ 14.53
AR   GTE   47   12 mo. contract - 51-100 lns per line                        MRC     Yes       Yes      $ 16.25   $ 1.94   $ 14.31
AR   GTE   47   36 mo. contract 51-100 lns per line                          MRC     Yes       Yes      $ 16.00   $ 1.91   $ 14.09
                                                                             
           47   Centranet Network Access Connection                          
AR   GTE   47   Rate Group I                                                 MRC     Yes       No       $ 28.64      N/A   $ 28.64
AR   GTE   47   Rate Group II                                                MRC     Yes       No       $ 33.74      N/A   $ 33.74
AR   GTE   47   Rate Group III                                               MRC     Yes       No       $ 35.09      N/A   $ 35.09
                                                                             
AR   GTE   47   Feature Series 1000 per line                                 MRC     Yes       Yes      $  2.00   $ 0.24   $  1.76
AR   GTE   47   Feature Series 2000 per line                                 MRC     Yes       Yes      $  2.30   $ 0.27   $  2.03
AR   GTE   47   Feature Series 3000 per line                                 MRC     Yes       Yes      $  2.50   $ 0.30   $  2.20
                                                                             
           47   Centranet System Features                                    
AR   GTE   47   Attendant Data Link Console Interface                        MRC     Yes       Yes      $ 90.00   $10.74   $ 79.26
AR   GTE   47   Attendant Flexible Night Answer                              MRC     Yes       Yes      $  0.25   $ 0.03   $  0.22
AR   GTE   47   Attendant Identification Multiple Directory Numbers          MRC     Yes       Yes      $  0.25   $ 0.03   $  0.22
AR   GTE   47   Attendant Non-Data Link console Interface                    MRC     Yes       Yes      $ 35.00   $ 4.18   $ 30.82
AR   GTE   47   Attendant Pre-Determined Night Answer (PNA)                  MRC     Yes       Yes      $  0.25   $ 0.03   $  0.22
AR   GTE   47   Attendant Universal Night Answer (UNA)                       MRC     Yes       Yes      $  0.25   $ 0.03   $  0.22
AR   GTE   47   Authorization code                                           MRC     Yes       Yes      $  1.00   $ 0.12   $  0.88
AR   GTE   47   automatic Route Selection                                    MRC     Yes       Yes      $175.00   $20.88   $154.12
</TABLE>

                                    Page 13

<PAGE>   100


                          GTE SOUTHWEST INC. ARKANSAS
                          RESALE PRODUCTS & SERVICES
                  GTE SOUTHWEST INC. GENERAL EXCHANGE TARIFF


<TABLE>
<CAPTION>
                                                                               BILLING   RESALE   DISCOUNT  RETAIL  AVOIDED  RESALE
ST   CO    SEC           SERVICE DESCRIPTION                                    TYPE    POSITION  POSITION   RATE    COST     RATE
- --   ---   ---           -------------------                                   ------   --------  --------  -----   -------  ----- 
<S>  <C>   <C>  <C>                                                              <C>     <C>      <C>       <C>     <C>      <C> 
                                                                                                                                  
AR   GTE   47   Code Call Access                                                 MRC     Yes      Yes      $ 25.00  $  2.98  $ 22.02
AR   GTE   47   Conference Call, 8 port                                          MRC     Yes      Yes      $ 60.00  $  7.16  $ 52.84
AR   GTE   47   Dictation Access and Control                                     MRC     Yes      Yes      $ 25.00  $  2.98  $ 22.02
AR   GTE   47   Fx Access                                                        MRC     Yes      Yes      $  3.00  $  0.36  $  2.64
AR   GTE   47   Limited Automatic Call distribution, per Group                   MRC     Yes      Yes      $  0.25  $  0.03  $  0.22
AR   GTE   47   Music on hold                                                    MRC     Yes      Yes      $ 25.00  $  2.98  $ 22.02
AR   GTE   47   Paging/Public Address Access                                     MRC     Yes      Yes      $ 25.00  $  2.98  $ 22.02
AR   GTE   47   Pilot Number                                                     MRC     Yes      Yes      $  0.25  $  0.03  $  0.22
AR   GTE   47   Preferential Hunting per line                                    MRC     Yes      Yes      $  0.25  $  0.03  $  0.22
AR   GTE   47   Priority queuing                                                 MRC     Yes      Yes      $  0.25  $  0.03  $  0.22
AR   GTE   47   Proprietary Set Interface                                        MRC     Yes      Yes      $  5.00  $  0.60  $  4.40
AR   GTE   47   Pseudo Number                                                    MRC     Yes      Yes      $  6.00  $  0.72  $  5.28
AR   GTE   47   Recorded Announcement                                            MRC     Yes      Yes      $ 50.00  $  5.97  $ 44.04
AR   GTE   47   Speed Call 30 (System)                                           MRC     Yes      Yes      $  0.25  $  0.03  $  0.22
AR   GTE   47   Station Message Detail Recording, per line                       MRC     Yes      Yes      $  0.30  $  0.04  $  0.26
AR   GTE   47   Stop hunt                                                        MRC     Yes      Yes      $  1.00  $  0.12  $  0.88
AR   GTE   47   Terminal Make Busy                                               MRC     Yes      Yes      $  1.25  $  0.15  $  1.10
AR   GTE   47   Tie Facility Access                                              MRC     Yes      Yes      $  3.00  $  0.36  $  2.64
AR   GTE   47   T1 access                                                        MRC     Yes      Yes      $100.00  $ 11.93  $ 88.07
AR   GTE   47   WATS Access                                                      MRC     Yes      Yes      $  3.00  $  0.36  $  2.64
AR   GTE   47   800 Service                                                      MRC     Yes      Yes      $  3.00  $  0.36  $  2.64
                                                                                                                             
           47   Centranet Data Base Changes                                                                                  
AR   GTE   47   Major Software Additions -Add Customized Dialing plan            NRC     Yes      No       $100.00      N/A  $100.00
AR   GTE   47   Major Software Additions -Add Cust. Requested DataBase profile   NRC     Yes      No       $100.00      N/A  $100.00
AR   GTE   47   Routine - Change Trunk Group                                     NRC     Yes      No       $ 50.00      N/A  $ 50.00
AR   GTE   47   Routine - Change non-Data-Link Attendant                         NRC     Yes      No       $ 50.00      N/A  $ 50.00
AR   GTE   47   Routine Change Customer Recording                                NRC     Yes      No       $ 50.00      N/A  $ 50.00
AR   GTE   47   Routine Change - ARS Translations                                NRC     Yes      No       $ 50.00      N/A  $ 50.00
AR   GTE   47   Routine Changer Translations Tables                              NRC     Yes      No       $ 50.00      N/A  $ 50.00
AR   GTE   47   Other data base additions/changes                                NRC     Yes      No       $ 50.00      N/A  $ 50.00
AR   GTE   47   Minor Software Changes                                                                                       
AR   GTE   47   Change subgroup                                                  NRC     Yes      No       $ 25.00      N/A  $ 25.00
AR   GTE   47   Hunt Groups                                                      NRC     Yes      No       $ 25.00      N/A  $ 25.00
AR   GTE   47   ACD hunt group                                                   NRC     Yes      No       $ 25.00      N/A  $ 25.00
AR   GTE   47   Simulated Facility Group                                         NRC     Yes      No       $ 25.00      N/A  $ 25.00
AR   GTE   47   Queuing groups                                                   NRC     Yes      No       $ 25.00      N/A  $ 25.00
AR   GTE   47   Night Answer                                                     NRC     Yes      No       $ 25.00      N/A  $ 25.00
AR   GTE   47   Paging/Public Address/code Calling                               NRC     Yes      No       $ 25.00      N/A  $ 25.00
AR   GTE   47   Conference Calling                                               NRC     Yes      No       $ 25.00      N/A  $ 25.00
AR   GTE   47   Remote Access Directory Number                                   NRC     Yes      No       $ 25.00      N/A  $ 25.00
AR   GTE   47   Authorization Code Validation                                    NRC     Yes      No       $ 25.00      N/A  $ 25.00
AR   GTE   47   Music on hold Access                                             NRC     Yes      No       $ 25.00      N/A  $ 25.00
AR   GTE   47   Dictation Link Access                                            NRC     Yes      No       $ 25.00      N/A  $ 25.00
AR   GTE   47   Standard Recording                                               NRC     Yes      No       $ 25.00      N/A  $ 25.00
</TABLE>
                                    Page 14
<PAGE>   101

                          GTE SOUTHWEST INC. ARKANSAS 
                           RESALE PRODUCTS & SERVICES
                  GTE SOUTHWEST INC. GENERAL EXCHANGE TARIFF



<TABLE>
<CAPTION>

                                                                    BILLING  RESALE  DISCOUNT      RETAIL   AVOIDED  RESALE
ST  CO    SEC           SERVICE DESCRIPTION                           TYPE  POSITION POSITION       RATE     COST     RATE
- --  ---   ---           -------------------                         ------  -------- --------      -----    -------   -----
<S><C>   <C>  <C>                                                   <C>      <C>     <C>        <C>         <C>     <C> 

AR  GTE   47   Extended Pick up Code                                  NRC      Yes      No         $25.00      N/A    $25.00   
AR  GTE   47   Executive Busy Override                                NRC      Yes      No         $25.00      N/A    $25.00
AR  GTE   47   Add Line Features                                      NRC      Yes      No         $25.00      N/A    $25.00
                                                                                                 
                G R A N D F A T H E R E D  S E R V I C E S                                            
                                                                                                 
           6   Schedule "B" Unimproved Exc./Rate Group II                                        
               (3001 -18,000) Inside Rate Base Area                                              
AR  GTE    6   Residence Two Party                                    MRC       No      No         $ 9.65      N/A       N/A
                                                                                                 
           6   Schedule "B" Unimproved Exc./Rate Group II                                        
               (3001 -18,000) Inside Rate Base Area                                              
AR  GTE    6   Residence Two Party                                    MRC       No      No         $11.00      N/A       N/A
                                                                                                 
           6   Schedule "B" Unimproved Exchanges / JACKSONVILLE/                                 
               Inside Rate Base Area                                                             
AR  GTE    6   Residence Two Party                                    MRC       No      No         $11.00      N/A       N/A
                                                                                                 
           6   Schedule "B" Unimproved Exchanges/Rate Group 1                                    
               (1-3000) Outside Rat                                                              
AR  GTE    6   Residence Four Party Rural                             MRC       No      No         $11.65      N/A       N/A
                                                                                                 
           6   Schedule "B"  Unimproved Exc./Rate Group II                                       
               (3001 -18,000) Outside Rate Base Area                                             
AR  GTE    6   Residence Four Party Rural                             MRC       No      No         $13.40      N/A       N/A
                                                                                                 
           6   Schedule "B"  Unimproved Exchanges/                                               
               JACKSONVILLE/Outside R                                                            
AR  GTE    6   Residence Four Party Rural                             MRC       No      No         $13.40      N/A       N/A
                                                                                                 
           6   EXTENDED AREA SERVICE RATES                                                       
           6   Schedule "B"  Unimproved Exchanges/Rate Group 1                                   
               (1-3000) Inside Rate Base Area EAS                                                
AR  GTE    6   Business Four Party Rural                              MRC      Yes     Yes         $ 9.75   $ 1.16    $ 8.59
AR  GTE    6   Residence Two Party                                    MRC       No      No         $ 2.75      N/A       N/A
                                                                                                                       
           6   Schedule "B"  Unimproved Exchanges/Rate Group II                                  
               (3001-18000) Inside Rate Base Area EAS                                            
AR  GTE    6   Business Four Party Rural                              MRC      Yes     Yes         $11.10   $ 1.32    $ 9.78
AR  GTE    6   Residence Two Party                                    MRC       No      No         $ 3.15      N/A       N/A
                                                                                                 
           6   Schedule "B" Unimproved Exchanges/Rate Group                                      
               JACKSONVILLE                                                                      
AR  GTE    6   Residence Two Party                                    MRC       No      No         $ 4.95      N/A       N/A
                                                                                                 
AR  GTE   16   Standard Pac-call wait, call fwd per line - bus.       MRC      Yes     Yes         $ 3.00   $ 0.36    $ 2.64
AR  GTE   16   Standard Pac-call wait, call fwd per line - res        MRC      Yes     Yes         $ 3.00   $ 0.36    $ 2.64
AR  GTE   16   Standard Pac-call wait, speed call 8 per line - bus    MRC      Yes     Yes         $ 3.00   $ 0.36    $ 2.64
AR  GTE   16   Standard Pac-call wait, speed call 8 per line - res    MRC      Yes     Yes         $ 3.00   $ 0.36    $ 2.64
AR  GTE   16   Standard Pac-call wait, speed call 30 per line - bus   MRC      Yes     Yes         $ 4.00   $ 0.48    $ 3.52
AR  GTE   16   Standard Pac-call wait, speed call 30 per line - res   MRC      Yes     Yes         $ 4.00   $ 0.48    $ 3.52
AR  GTE   16   Standard Pac-call fwd, speed call 8 per line - bus     MRC      Yes     Yes         $ 3.00   $ 0.36    $ 2.64
AR  GTE   16   Standard Pac-call fwd, speed call 8 per line - res     MRC      Yes     Yes         $ 3.00   $ 0.36    $ 2.64
</TABLE>

                                    Page 15
<PAGE>   102


                         GTE SOUTHWEST INC. ARKANSAS
                           RESALE PRODUCTS & SERVICES
                  GTE SOUTHWEST INC. GENERAL EXCHANGE TARIFF


<TABLE>
<CAPTION>
                                                                            BILLING  RESALE   DISCOUNT  RETAIL AVOIDED  RESALE
ST   CO    SEC           SERVICE DESCRIPTION                                 TYPE   POSITION  POSITION   RATE    COST    RATE
- --   ---   ---           -------------------                                 ------ --------  --------  -----  -------  -----
<S>  <C>   <C>  <C>                                                           <C>    <C>       <C>     <C>     <C>    <C> 
AR   GTE   16   Standard Pac-call fwd, speed call 30 per line - bus            MRC     Yes       Yes    $4.00   $0.48  $ 3.52
AR   GTE   16   Standard Pac-call fwd, speed call 30 per line - res            MRC     Yes       Yes    $4.00   $0.48  $ 3.52
AR   GTE   16   Deluxe Pac-call wait, call fwd, speed call 8 per line - bus    MRC     Yes       Yes    $5.00   $0.60  $ 4.40
AR   GTE   16   Deluxe Pac-call wait, call fwd, speed call 8 per line - res    MRC     Yes       Yes    $5.00   $0.60  $ 4.40
AR   GTE   16   Deluxe Pac-call wait, call fwd, speed call 30 per line - bus   MRC     Yes       Yes    $6.00   $0.72  $ 5.28
AR   GTE   16   Deluxe Pac-call wait, call fwd, speed call 30 per line - res   MRC     Yes       Yes    $6.00   $0.72  $ 5.28
AR   GTE   16   Smart Call Pak -call wait, Call fwd, per line - bus            MRC     Yes       Yes    $5.00   $0.60  $ 4.40
AR   GTE   16   Smart Call Pak -call wait, Call fwd, per line - res            MRC     Yes       Yes    $4.00   $0.48  $ 3.52

</TABLE>


                                    Page 16
<PAGE>   103

                         GTE SOUTHWEST INC. ARKANSAS
                           RESALE PRODUCTS & SERVICES
                  GTE SOUTHWEST INC. GENERAL EXCHANGE TARIFF


<TABLE>
<CAPTION>
                                                                                 BILLING   RESALE  DISCOUNT  RETAIL  AVOIDED  RESALE
ST      CO       SEC           SERVICE DESCRIPTION                                 TYPE   POSITION POSITION   RATE     COST    RATE
- --      ---      ---           -------------------                                ------  -------- --------  -----   -------  -----
<S>    <C>       <C>       <C>                                                     <C>    <C>      <C>      <C>      <C>    <C> 
SWB PRIVATE LINE TARIFF
                            IntraLATA Interexchange Private Lines
                   2        Series 100
                               Type 102
AR      GTE                      Local Channel, ea                                   NRC    Yes       No     $225.00   N/A   $225.00
AR      GTE                      Local Channel, ea                                   MRC    Yes       No      $22.00   N/A    $22.00
AR      GTE                      Interoffice Channel, ea mi                          MRC    Yes       No       $4.00   N/A     $4.00
AR      GTE                      Interoffice Channel Terminal, per channel           MRC    Yes       No      $14.25   N/A    $14.25
                   2             IX Channel                                                                           
AR      GTE                        0 to 250 mi ea mi                                 MRC    Yes       No       $5.75   N/A     $5.75
AR      GTE                        Ea additional mi over 250                         MRC    Yes       No       $3.90   N/A     $3.90
AR      GTE                      IX Channel Terminal ea, 2 required per IX channel   MRC    Yes       No      $10.75   N/A    $10.75
                   2        Series 200                                                                                
                               Type 250                                                                               
                                 Interoffice Channel                                                                  
AR      GTE                        Half-duplex                                       MRC    Yes       No       $5.00   N/A     $5.00
AR      GTE                        Duplex                                            MRC    Yes       No       $8.00   N/A     $8.00
                   2             Interoffice Channel Terminal, per terminal                                           
AR      GTE                        Half-duplex                                       MRC    Yes       No       $2.60   N/A     $2.60
AR      GTE                        Duplex                                            MRC    Yes       No       $2.60   N/A     $2.60
                                 IX Channel, ea mi                                                                    
                                   Half-duplex                                                                        
AR      GTE                          0 to 250 mi, ea mi                              MRC    Yes       No       $4.70   N/A     $4.70
AR      GTE                          Ea additional mi over 250                       MRC    Yes       No       $4.70   N/A     $4.70
                                   Duplex                                                                             
AR      GTE                          0 to 250 mi, ea mi                              MRC    Yes       No       $4.70   N/A     $4.70
                                     Ea additional mi over 250                                                        
                                 IX Channel Terminal                                                                  
AR      GTE                        Half-duplex                                       MRC    Yes       No      $53.00   N/A    $53.00
AR      GTE                        Duplex                                            MRC    Yes       No      $55.00   N/A    $55.00
                   2           Type 251                                                                           
                                 Interoffice Channel                                                                
AR      GTE                        Half-duplex                                       MRC    Yes       No       $5.00   N/A     $5.00
AR      GTE                        Duplex                                            MRC    Yes       No       $8.00   N/A     $8.00
                   2             Interoffice Channel Terminal                                                       
AR      GTE                        Half-duplex                                       MRC    Yes       No       $2.60   N/A     $2.60
AR      GTE                        Duplex                                            MRC    Yes       No       $2.60   N/A     $2.60
                                 IX Channel, ea                                                                     
                                   Half-duplex                                                                      
AR      GTE                            0 to 250 mi, ea mi                            MRC    Yes       No       $2.90   N/A     $2.90
AR      GTE                            Ea additional mi over 250                     MRC    Yes       No       $2.90   N/A     $2.90
                                   Duplex                                                                           
AR      GTE                            0 to 250 mi, ea mi                            MRC    Yes       No       $2.90   N/A     $2.90
                                       Ea additianl mi over 250                                                $2.90  
</TABLE>



                                    Page 17
<PAGE>   104

                         GTE SOUTHWEST INC. ARKANSAS
                           RESALE PRODUCTS & SERVICES
                  GTE SOUTHWEST INC. GENERAL EXCHANGE TARIFF



<TABLE>
<CAPTION>

                                                                     BILLING   RESALE    DISCOUNT      RETAIL  AVOIDED       RESALE
ST     CO        SEC           SERVICE DESCRIPTION                    TYPE    POSITION   POSITION       RATE     COST         RATE
- --     ---       ---           -------------------                   ------   -------   --------       -----   -------       -----
<S>    <C>       <C>     <C>                                         <C>      <C>       <C>           <C>      <C>       <C> 

                                  IX Channel Terminal
AR      GTE                          Half-duplex                      MRC      Yes         No          $47.00    N/A         $47.00
AR      GTE                          Duplex                           MRC      Yes         No          $47.00    N/A         $47.00
                   2        Series 400                                                                           
                               Local Channel, ea                                                                 
AR      GTE                      Type 414B                            MRC      Yes         No          $66.00    N/A         $66.00
AR      GTE                      Type 414B                            NRC      Yes         No         $590.00    N/A        $590.00
AR      GTE                      Type 414C                            NRC      Yes         No         $445.00    N/A        $445.00
AR      GTE                      Type 415                             MRC      Yes         No          $21.00    N/A         $21.00
AR      GTE                      Type 415                             NRC      Yes         No         $155.00    N/A        $155.00
AR      GTE                      Type 417A                            MRC      Yes         No          $35.50    N/A         $35.50
AR      GTE                      Type 417A                            NRC      Yes         No         $360.00    N/A        $360.00
AR      GTE                      Type 417B                            MRC      Yes         No          $35.50    N/A         $35.50
AR      GTE                      Type 417B                            NRC      Yes         No         $410.00    N/A        $410.00
AR      GTE                      Type 420                             MRC      Yes         No          $52.00    N/A         $52.00
AR      GTE                      Type 420                             NRC      Yes         No         $290.00    N/A        $290.00
AR      GTE                      Type 422                             MRC      Yes         No          $51.00    N/A         $51.00
AR      GTE                      Type 422                             NRC      Yes         No         $295.00    N/A        $295.00
AR      GTE                      Type 423                             MRC      Yes         No          $21.00    N/A         $21.00
AR      GTE                      Type 423                             NRC      Yes         No         $270.00    N/A        $270.00
AR      GTE                      Type 424                             MRC      Yes         No          $53.00    N/A         $53.00
AR      GTE                      Type 424                             NRC      Yes         No         $340.00    N/A        $340.00
AR      GTE                      Type 425                             MRC      Yes         No          $38.00    N/A         $38.00
AR      GTE                      Type 425                             NRC      Yes         No         $280.00    N/A        $280.00
AR      GTE                      Type 428                             MRC      Yes         No          $23.50    N/A         $23.50
AR      GTE                      Type 428                             NRC      Yes         No         $260.00    N/A        $260.00
AR      GTE                      Type 432                             MRC      Yes         No          $47.00    N/A         $47.00
AR      GTE                      Type 432                             NRC      Yes         No         $470.00    N/A        $470.00
AR      GTE                      Type 435                             MRC      Yes         No          $54.00    N/A         $54.00
AR      GTE                      Type 435                             NRC      Yes         No         $260.00    N/A        $260.00
AR      GTE                      Type 442                             MRC      Yes         No          $21.75    N/A         $21.75
AR      GTE                      Type 442                             NRC      Yes         No         $265.00    N/A        $265.00
AR      GTE                      Type 443                             MRC      Yes         No          $57.00    N/A         $57.00
AR      GTE                      Type 443                             NRC      Yes         No         $275.00    N/A        $275.00
AR      GTE        2           Interoffice Channel ea mi              MRC      Yes         No           $7.75    N/A          $7.75
AR      GTE                    Interoffice Channel Terminal,                                                     
                                 per terminal                         MRC      Yes         No           $3.20    N/A          $3.20
                               IX Channel, per mile                                                              
AR      GTE                      0 to 250 mi, ea mi                   MRC      Yes         No           $4.70    N/A          $4.70
AR      GTE                      Ea additional mi over 250            MRC      Yes         No           $3.20    N/A          $3.20
                   2           IX Channel Terminal, per Terminal,                                                
                                 2 required per ch.                                                              
AR      GTE                      Type 414B                            MRC      Yes         No          $33.00    N/A         $33.00
AR      GTE                      Type 414C                            MRC      Yes         No          $33.00    N/A         $33.00
AR      GTE                      Type 417A                            MRC      Yes         No          $33.00    N/A         $33.00
AR      GTE                      Type 417B                            MRC      Yes         No          $33.00    N/A         $33.00
AR      GTE                      Type 420                             MRC      Yes         No          $33.00    N/A         $33.00
</TABLE>


                                    Page 18
<PAGE>   105

                         GTE SOUTHWEST INC. ARKANSAS
                           RESALE PRODUCTS & SERVICES
                  GTE SOUTHWEST INC. GENERAL EXCHANGE TARIFF


<TABLE>
<CAPTION>
                                                                            BILLING  RESALE   DISCOUNT  RETAIL  AVOIDED  RESALE
ST     CO         SEC           SERVICE DESCRIPTION                          TYPE   POSITION  POSITION  RATE     COST     RATE
- --     ---        ---           -------------------                         ------  --------  --------  -----   -------   -----
<S>  <C>         <C>       <C>                                                <C>   <C>         <C>    <C>      <C>       <C> 

AR      GTE                      Type 422                                      MRC    Yes         No    $33.00    N/A     $33.00
AR      GTE                      Type 423                                      MRC    Yes         No    $33.00    N/A     $33.00
AR      GTE                      Type 424                                      MRC    Yes         No    $33.00    N/A     $33.00
AR      GTE                      Type 425                                      MRC    Yes         No    $33.00    N/A     $33.00
AR      GTE                      Type 428                                      MRC    Yes         No    $33.00    N/A     $33.00
AR      GTE                      Type 432                                      MRC    Yes         No    $33.00    N/A     $33.00
AR      GTE                      Type 435                                      MRC    Yes         No    $33.00    N/A     $33.00
AR      GTE                      Type 442                                      MRC    Yes         No    $33.00    N/A     $33.00
AR      GTE                      Type 443                                      MRC    Yes         No    $33.00    N/A     $33.00
AR      GTE        2           Bridging Charge, (Multi-point Serv.)                                                       
                                per channel bridged                            MRC    Yes         No     $9.50    N/A      $9.50
                   2        Signaling Arrangements                                                                        
                             IX IntraLATA                                                                             
AR      GTE                        Manual (J1B)                                MRC    Yes         No    $20.75    N/A     $20.75
AR      GTE                        Manual (J1B)                                NRC    Yes         No    $75.00    N/A     $75.00
AR      GTE                        Automatic (J1A)                             MRC    Yes         No    $15.00    N/A     $15.00
AR      GTE                        Automatic (J1A)                             NRC    Yes         No    $75.00    N/A     $75.00
                   2               E & M Type Signaling                                                                   
AR      GTE                          Type 420                                  MRC    Yes         No    $12.25    N/A     $12.25
AR      GTE                          Type 420                                  NRC    Yes         No    $75.00    N/A     $75.00
AR      GTE                          Type 422                                  MRC    Yes         No    $12.25    N/A     $12.25
AR      GTE                          Type 422                                  NRC    Yes         No    $75.00    N/A     $75.00
AR      GTE                          Type 423                                  MRC    Yes         No    $23.00    N/A     $23.00
AR      GTE                          Type 423                                  NRC    Yes         No    $75.00    N/A     $75.00
AR      GTE                          Type 424                                  MRC    Yes         No    $12.50    N/A     $12.50
AR      GTE                          Type 424                                  NRC    Yes         No    $75.00    N/A     $75.00
AR      GTE                          Type 425                                  MRC    Yes         No    $27.50    N/A     $27.50
AR      GTE                          Type 425                                  NRC    Yes         No    $75.00    N/A     $75.00
AR      GTE                          Type 428                                  MRC    Yes         No    $14.25    N/A     $14.25
AR      GTE                          Type 428                                  NRC    Yes         No    $75.00    N/A     $75.00
AR      GTE                          Type 435                                  MRC    Yes         No    $14.25    N/A     $14.25
AR      GTE                          Type 435                                  NRC    Yes         No    $75.00    N/A     $75.00
                                   Loop Signaling, capable of 900                                                         
                                    ohms or more                                                                           
AR      GTE                          Type 420                                  MRC    Yes         No    $12.25    N/A     $12.25
AR      GTE                          Type 420                                  NRC    Yes         No    $75.00    N/A     $75.00
AR      GTE                          Type 422                                  MRC    Yes         No     $8.25    N/A      $8.25
AR      GTE                          Type 422                                  NRC    Yes         No    $75.00    N/A     $75.00
AR      GTE                          Type 423                                  MRC    Yes         No     $8.75    N/A      $8.75
AR      GTE                          Type 423                                  NRC    Yes         No    $75.00    N/A     $75.00
AR      GTE                          Type 435                                  MRC    Yes         No     $7.50    N/A      $7.50
AR      GTE                          Type 435                                  NRC    Yes         No    $75.00    N/A     $75.00
                                   Loop Signaling, capable of less                                                        
                                    than 900 ohms                                                                           
AR      GTE                          Type 420                                  MRC    Yes         No    $18.50    N/A     $18.50
AR      GTE                          Type 420                                  NRC    Yes         No    $75.00    N/A     $75.00
AR      GTE                          Type 422                                  MRC    Yes         No    $15.25    N/A     $15.25
AR      GTE                          Type 422                                  NRC    Yes         No    $75.00    N/A     $75.00
</TABLE>   

                                   Page 19

<PAGE>   106
                          GTE SOUTHWEST INC. ARKANSAS 
                           RESALE PRODUCTS & SERVICES
                  GTE SOUTHWEST INC. GENERAL EXCHANGE TARIFF

<TABLE>
<CAPTION>
                                                                            Billing  Resale   Discount  Retail  Avoided  Resale
St      Co   Sec   Service Description                                       Type   Position  Position   Rate     Cost    Rate
- --     ---   ---   -------------------                                      ------  -------   --------  -----   -------   -----
<S>    <C>   <C>   <C>                                                       <C>      <C>   <C>   <C>       <C>      <C> 

AR      GTE           Type 423                                                 MRC     Yes      No       $10.50    N/A    $10.50
AR      GTE           Type 423                                                 NRC     Yes      No       $75.00    N/A    $75.00
AR      GTE           Type 435                                                 MRC     Yes      No       $12.00    N/A    $12.00
AR      GTE           Type 435                                                 NRC     Yes      No       $75.00    N/A    $75.00
AR      GTE         Type A, resistance in the range of 0-199 ohms              MRC     Yes      No        $6.25    N/A     $6.25
AR      GTE         Type A, resistance in the range of 0-199 ohms              NRC     Yes      No       $75.00    N/A    $75.00
AR      GTE         Type B, resistance in the range of 200 to 899 ohms         MRC     Yes      No        $3.80    N/A     $3.80
AR      GTE         Type B, resistance in the range of 200 to 899 ohms         NRC     Yes      No       $75.00    N/A    $75.00
AR      GTE         Type C, resistance of 900 ohms or more                     MRC     Yes      No        $1.50    N/A     $1.50
AR      GTE         Type C, resistance of 900 ohms or more                     NRC     Yes      No       $75.00    N/A    $75.00
</TABLE>

                                    Page 20

<PAGE>   107

                            GTE SOUTHWEST ARKANSAS
                           RESALE PRODUCTS & SERVICES
                  GTE SOUTHWEST INC. GENERAL EXCHANGE TARIFF


<TABLE>
<CAPTION>

                                                              Billing    Resale       Discount   Retail    Avoided          Resale
St     Co        Sec           Service Description            Type       Position     Position    Rate       Cost            Rate
- --     ---       ---           -------------------            ------     -------      --------    -----     -------         -----
<S>   <C>      <C>         <C>                               <C>         <C>            <C>     <C>          <C>         <C> 

ST      CO       Tariff     GTE Long Distance Telecommunications Services:
                               IntraLATA Two Point Service:
                            Day Rate:
                                 Initial Minute:
AR      GTE      .D.MTS            1 to 8 Miles                USAGE         Yes          Yes     $0.10        $0.01        $0.09
AR      GTE      .D.MTS            9 to 12 Miles               USAGE         Yes          Yes     $0.12        $0.01        $0.11
AR      GTE      .D.MTS            13 to 16 Miles              USAGE         Yes          Yes     $0.15        $0.02        $0.13
AR      GTE      .D.MTS            17 to 21 Miles              USAGE         Yes          Yes     $0.18        $0.02        $0.16
AR      GTE      .D.MTS            22 to 26 Miles              USAGE         Yes          Yes     $0.23        $0.03        $0.20
AR      GTE      .D.MTS            27 to 31 Miles              USAGE         Yes          Yes     $0.23        $0.03        $0.20
AR      GTE      .D.MTS            32 to 41 Miles              USAGE         Yes          Yes     $0.23        $0.03        $0.20
AR      GTE      .D.MTS            42 to 56 Miles              USAGE         Yes          Yes     $0.23        $0.03        $0.20
AR      GTE      .D.MTS            57 to 71 Miles              USAGE         Yes          Yes     $0.23        $0.03        $0.20
AR      GTE      .D.MTS            72 to 87 Miles              USAGE         Yes          Yes     $0.23        $0.03        $0.20
AR      GTE      .D.MTS            88 to 127 Miles             USAGE         Yes          Yes     $0.23        $0.03        $0.20
AR      GTE      .D.MTS            Over 128 Miles              USAGE         Yes          Yes     $0.23        $0.03        $0.20
                                 Each Additional Minute:
AR      GTE      .D.MTS            1 to 8 Miles                USAGE         Yes          Yes     $0.08        $0.01        $0.07
AR      GTE      .D.MTS            9 to 12 Miles               USAGE         Yes          Yes     $0.10        $0.01        $0.09
AR      GTE      .D.MTS            13 to 16 Miles              USAGE         Yes          Yes     $0.12        $0.01        $0.11
AR      GTE      .D.MTS            17 to 21 Miles              USAGE         Yes          Yes     $0.15        $0.02        $0.13
AR      GTE      .D.MTS            22 to 26 Miles              USAGE         Yes          Yes     $0.18        $0.02        $0.16
AR      GTE      .D.MTS            27 to 31 Miles              USAGE         Yes          Yes     $0.20        $0.02        $0.18
AR      GTE      .D.MTS            32 to 41 Miles              USAGE         Yes          Yes     $0.22        $0.03        $0.19
AR      GTE      .D.MTS            42 to 56 Miles              USAGE         Yes          Yes     $0.23        $0.03        $0.20
AR      GTE      .D.MTS            57 to 71 Miles              USAGE         Yes          Yes     $0.23        $0.03        $0.20
AR      GTE      .D.MTS            72 to 87 Miles              USAGE         Yes          Yes     $0.23        $0.03        $0.20
AR      GTE      .D.MTS            88 to 127 Miles             USAGE         Yes          Yes     $0.23        $0.03        $0.20
AR      GTE      .D.MTS            Over 128 Miles              USAGE         Yes          Yes     $0.23        $0.03        $0.20
                            Evening Rate:
                                 Initial Minute:
AR      GTE      .D.MTS            1 to 8 Miles                USAGE         Yes          Yes     $0.0831      $0.0099      $0.0732
AR      GTE      .D.MTS            9 to 12 Miles               USAGE         Yes          Yes     $0.0997      $0.0119      $0.0878
AR      GTE      .D.MTS           13 to 16 Miles               USAGE         Yes          Yes     $0.1246      $0.0149      $0.1097
AR      GTE      .D.MTS           17 to 21 Miles               USAGE         Yes          Yes     $0.1496      $0.0178      $0.1318
AR      GTE      .D.MTS           22 to 26 Miles               USAGE         Yes          Yes     $0.1911      $0.0228      $0.1683
AR      GTE      .D.MTS           27 to 31 Miles               USAGE         Yes          Yes     $0.1911      $0.0228      $0.1683
AR      GTE      .D.MTS           32 to 41 Miles               USAGE         Yes          Yes     $0.1911      $0.0228      $0.1683
AR      GTE      .D.MTS           42 to 56 Miles               USAGE         Yes          Yes     $0.1911      $0.0228      $0.1683
AR      GTE      .D.MTS           57 to 71 Miles               USAGE         Yes          Yes     $0.1911      $0.0228      $0.1683
AR      GTE      .D.MTS           72 to 87 Miles               USAGE         Yes          Yes     $0.1911      $0.0228      $0.1683
AR      GTE      .D.MTS           88 to 127 Miles              USAGE         Yes          Yes     $0.1911      $0.0228      $0.1683
AR      GTE      .D.MTS           Over 128 Miles               USAGE         Yes          Yes     $0.1911      $0.0228      $0.1683
                                Each Additional Minute:
AR      GTE      .D.MTS            1 to 8  Miles               USAGE         Yes          Yes     $0.0665      $0.0079      $0.0586

</TABLE>


                                    Page 21
<PAGE>   108


                         GTE SOUTHWEST INC. ARKANSAS
                           RESALE PRODUCTS & SERVICES
                  GTE SOUTHWEST INC. GENERAL EXCHANGE TARIFF


<TABLE>
<CAPTION>
                                                             BILLING      RESALE    DISCOUNT  RETAIL      AVOIDED       RESALE
ST      CO       SEC           SERVICE DESCRIPTION             TYPE      POSITION   POSITION   RATE         COST         RATE
- --      ---      ---           -------------------            ------     --------   --------  ------      -------       ------
<S>    <C>      <C>           <C>                             <C>          <C>       <C>   <C>           <C>           <C> 
AR      GTE      .D.MTS            9 to 12 Miles               USAGE         Yes      Yes    $0.0831      $0.0099      $0.0732
AR      GTE      .D.MTS            13 to 16 Miles              USAGE         Yes      Yes    $0.0997      $0.0119      $0.0878
AR      GTE      .D.MTS            17 to 21 Miles              USAGE         Yes      Yes    $0.1246      $0.0149      $0.1097
AR      GTE      .D.MTS            22 to 26 Miles              USAGE         Yes      Yes    $0.1496      $0.0178      $0.1318
AR      GTE      .D.MTS            27 to 31 Miles              USAGE         Yes      Yes    $0.1662      $0.0198      $0.1464
AR      GTE      .D.MTS            32 to 41 Miles              USAGE         Yes      Yes    $0.1828      $0.0218      $0.1610
AR      GTE      .D.MTS            42 to 56 Miles              USAGE         Yes      Yes    $0.1911      $0.0228      $0.1683
AR      GTE      .D.MTS            57 to 71 Miles              USAGE         Yes      Yes    $0.1911      $0.0228      $0.1683
AR      GTE      .D.MTS            72 to 87 Miles              USAGE         Yes      Yes    $0.1911      $0.0228      $0.1683
AR      GTE      .D.MTS            88 to 127 Miles             USAGE         Yes      Yes    $0.1911      $0.0228      $0.1683
AR      GTE      .D.MTS            Over 128 Miles              USAGE         Yes      Yes    $0.1911      $0.0228      $0.1683
                            Night/Weekend Rate:
                                 Initial Minute:
AR      GTE      .D.MTS            1 to 8 Miles                USAGE         Yes       Yes   $0.0550      $0.0066      $0.0484
AR      GTE      .D.MTS            9 to 12 Miles               USAGE         Yes       Yes   $0.0660      $0.0079      $0.0581
AR      GTE      .D.MTS            13 to 16 Miles              USAGE         Yes       Yes   $0.0825      $0.0098      $0.0727
AR      GTE      .D.MTS            17 to 21 Miles              USAGE         Yes       Yes   $0.0990      $0.0118      $0.0872
AR      GTE      .D.MTS            22 to 26 Miles              USAGE         Yes       Yes   $0.1265      $0.0151      $0.1114
AR      GTE      .D.MTS            27 to 31 Miles              USAGE         Yes       Yes   $0.1265      $0.0151      $0.1114
AR      GTE      .D.MTS            32 to 41 Miles              USAGE         Yes       Yes   $0.1265      $0.0151      $0.1114
AR      GTE      .D.MTS            42 to 56 Miles              USAGE         Yes       Yes   $0.1265      $0.0151      $0.1114
AR      GTE      .D.MTS            57 to 71 Miles              USAGE         Yes       Yes   $0.1265      $0.0151      $0.1114
AR      GTE      .D.MTS            72 to 87 Miles              USAGE         Yes       Yes   $0.1265      $0.0151      $0.1114
AR      GTE      .D.MTS            88 to 127 Miles             USAGE         Yes       Yes   $0.1265      $0.0151      $0.1114
AR      GTE      .D.MTS            Over 128 Miles              USAGE         Yes       Yes   $0.1265      $0.0151      $0.1114
                                 Each Additional Minute:
AR      GTE      .D.MTS            1 to 8 Miles                USAGE         Yes       Yes   $0.0440      $0.0052      $0.0388
AR      GTE      .D.MTS            9 to 12 Miles               USAGE         Yes       Yes   $0.0550      $0.0066      $0.0484
AR      GTE      .D.MTS            13 to 16 Miles              USAGE         Yes       Yes   $0.0660      $0.0079      $0.0581
AR      GTE      .D.MTS            17 to 21 Miles              USAGE         Yes       Yes   $0.0825      $0.0098      $0.0727
AR      GTE      .D.MTS            22 to 26 Miles              USAGE         Yes       Yes   $0.0990      $0.0118      $0.0872
AR      GTE      .D.MTS            27 to 31 Miles              USAGE         Yes       Yes   $0.1100      $0.0131      $0.0969
AR      GTE      .D.MTS            32 to 41 Miles              USAGE         Yes       Yes   $0.1210      $0.0144      $0.1066
AR      GTE      .D.MTS            42 to 56 Miles              USAGE         Yes       Yes   $0.1265      $0.0151      $0.1114
AR      GTE      .D.MTS            57 to 71 Miles              USAGE         Yes       Yes   $0.1265      $0.0151      $0.1114
AR      GTE      .D.MTS            72 to 87 Miles              USAGE         Yes       Yes   $0.1265      $0.0151      $0.1114
AR      GTE      .D.MTS            88 to 127 Miles             USAGE         Yes       Yes   $0.1265      $0.0151      $0.1114
AR      GTE      .D.MTS            Over 128 Miles              USAGE         Yes       Yes   $0.1265      $0.0151      $0.1114

AR      GTE      .D.MTS     Service Charge - Dial Calling 
                             Card - Station to Station         USAGE         Yes        No     $0.35          N/A        $0.35
AR      GTE      .D.MTS     Service Charge - Operator -
                             Station to Station                USAGE         Yes        No     $0.90          N/A        $0.90
AR      GTE      .D.MTS     Service Charge - Person to
                             Person                            USAGE         Yes        No     $2.50          N/A        $2.50

AR      GTE      .D.MTS     Enterprise Service                  MRC          Yes        No     $4.40          N/A        $4.40

</TABLE>


                                    Page 22

<PAGE>   109

                         GTE SOUTHWEST INC. ARKANSAS
                           RESALE PRODUCTS & SERVICES
                  GTE SOUTHWEST INC. GENERAL EXCHANGE TARIFF



<TABLE>
<CAPTION>
                                                                          Billing  Resale  Discount  Retail  Avoided   Resale
St      Co        Sec           Service Description                        Type   Position Position   Rate     Cost     Rate
- --     ---        ---           -------------------                       ------  -------- --------   -----  -------   -----
<S>    <C>       <C>       <C>                                            <C>      <C>     <C>     <C>       <C>      <C> 
                                                                         
AR      GTE      .D.MTS     Selective Class of Call Screening               MRC      Yes     Yes      $53.00    $6.32    $46.68
AR      GTE      .D.MTS     Selective Class of Call Screening               NRC      Yes      No     $340.00    N/A     $340.00
                                                                           
AR      GTE      .D.MTS     PrePaid Calling Card Service (per minute)      USAGE     Yes     Yes       $0.40    $0.05     $0.35
                                                                           
                               Conference Service:                         
AR      GTE      .D.MTS     Conference Call Set-Up Charge                  USAGE     Yes      No       $1.50    N/A       $1.50
                            Conference Call Per Minute of Use Charge:      
AR      GTE      .D.MTS          0-26 Miles                                USAGE     Yes      No       $0.05    N/A       $0.05
AR      GTE      .D.MTS          27-71 Miles                               USAGE     Yes      No       $0.10    N/A       $0.10
AR      GTE      .D.MTS          Over 71 Miles                             USAGE     Yes      No       $0.15    N/A       $0.15
                                                                           
                               IntraLATA Optional Toll Calling Plans:      
                            Extended Community Saver:                      
                                 Residence:                                
                                   Block-of-Time:                          
AR      GTE      OCP                 Monthly Rate for First Hour            MRC      Yes     Yes       $2.70    $0.32     $2.38
AR      GTE      OCP                 Additional Per Minute                 USAGE     Yes     Yes       $0.045   $0.005    $0.040
                                 Business:                                 
                                   Block-of-Time:                          
AR      GTE      OCP                 Monthly Rate for First Hour            MRC      Yes     Yes       $2.70    $0.32     $2.38
AR      GTE      OCP                 Additional Per Minute                 USAGE     Yes     Yes       $0.045   $0.005    $0.040
                                 Residence:                                
AR      GTE      OCP               Unlimited Usage                          MRC      No       No      $16.20    N/A      N/A
                                 Business:                                 
AR      GTE      OCP               Unlimited Usage                          MRC      Yes     Yes      $18.00    $2.15    $15.85
                                                                           
                            Circle Saver:                                  
                                 Residence Block-of-Time:                  
                                   41 Mile Radius:                         
AR      GTE      OCP                 Monthly Rate for First Hour            MRC      Yes     Yes       $6.00    $0.72     $5.28
AR      GTE      OCP                 Additional Per Minute                 USAGE     Yes     Yes       $0.10    $0.01     $0.09
                                 Business Block-of-Time:                   
                                   41 Mile Radius:                         
AR      GTE      OCP                 Monthly Rate for First Hour            MRC      Yes     Yes       $6.00    $0.72     $5.28
AR      GTE      OCP                 Additional Per Minute                 USAGE     Yes     Yes       $0.10    $0.01     $0.09
                                                                           
                            Circle Saver Trial Plan - Fort Smith LATA:     
                                 Residence:                                
AR      GTE      OCP               Unlimited Usage (one-way originating    
                                    calling)                                MRC      No       No      $19.95    N/A      N/A
                                 Business:                                 
AR      GTE      OCP               Unlimited Usage (one-way originating    
                                    calling)                                MRC      Yes     Yes      $34.95    $4.17     $30.78
  
                            1+ Saver:  
  
</TABLE>  
  

                                    Page 23

<PAGE>   110

                         GTE SOUTHWEST INC. ARKANSAS
                           RESALE PRODUCTS & SERVICES
                  GTE SOUTHWEST INC. GENERAL EXCHANGE TARIFF



<TABLE>
<CAPTION>

                                                                           Billing   Resale   Discount    Retail  Avoided   Resale
St      Co    Sec           Service Description                             Type    Position  Position    Rate      Cost     Rate
- --      ---   ---           -------------------                            ------   --------  --------    -----   -------   -----
<S>    <C>    <C>          <C>                                            <C>         <C>     <C>      <C>        <C>      <C> 

                                 Residence:
                                   Block-of-Time:
AR      GTE   OCP                    Monthly Rate for First Hour             MRC       Yes      Yes       $7.80     $0.93     $6.87
AR      GTE   OCP                    Additional Per Minute                  USAGE      Yes      Yes       $0.13     $0.02     $0.11
                                   Block-of-Time:
AR      GTE   OCP                    Monthly Rate for First 5 Hours          MRC       Yes      Yes      $36.00     $4.29    $31.71
AR      GTE   OCP                    Additional Per Minute                  USAGE      Yes      Yes       $0.12     $0.01     $0.11
                                   Block-of-Time:
AR      GTE   OCP                    Monthly Rate for First 10 Hours         MRC       Yes      Yes      $60.00     $7.16    $52.84
AR      GTE   OCP                    Additional Per Minute                  USAGE      Yes      Yes       $0.10     $0.01     $0.09
                                 Business:
                                   Block-of-Time:
AR      GTE   OCP                    Monthly Rate for First Hour             MRC       Yes      Yes       $7.80     $0.93     $6.87
AR      GTE   OCP                    Additional Per Minute                  USAGE      Yes      Yes       $0.13     $0.02     $0.11
                                   Block-of-Time:
AR      GTE   OCP                    Monthly Rate for First 5 Hours          MRC       Yes      Yes      $36.00     $4.29    $31.71
AR      GTE   OCP                    Additional Per Minute                  USAGE      Yes      Yes       $0.12     $0.01     $0.11
                                   Block-of-Time:
AR      GTE   OCP                    Monthly Rate for First 10 Hours         MRC       Yes      Yes      $60.00     $7.16    $52.84
AR      GTE   OCP                    Additional Per Minute                  USAGE      Yes      Yes       $0.10     $0.01     $0.09
                 
                                 Residence:
                                   Discount Plan:
AR      GTE   OCP                    10 % Discount                           MRC       Yes      Yes     Varies    Varies    Varies
AR      GTE   OCP                    15 % Discount                           MRC       Yes      Yes     Varies    Varies    Varies
AR      GTE   OCP                    20 % Discount                           MRC       Yes      Yes     Varies    Varies    Varies
                                 Business:
                                   Discount Plan:
AR      GTE   OCP                    10 % Discount                           MRC       Yes      Yes     Varies    Varies    Varies
AR      GTE   OCP                    15 % Discount                           MRC       Yes      Yes     Varies    Varies    Varies
AR      GTE   OCP                    20 % Discount                           MRC       Yes      Yes     Varies    Varies    Varies
                 
                            Designated Number Plan:
                                 Residence:
AR      GTE   OCP                  Unlimited Usage to First
                                    Designated Number                        MRC       Yes      Yes      $15.00     $1.79    $13.21
AR      GTE   OCP                  Unlimited Usage to Each Additional
                                    Designated Number                        MRC       Yes      Yes      $10.00     $1.19     $8.81
                                 Business:
AR      GTE   OCP                  Unlimited Usage to First Designated 
                                    Number                                   MRC       Yes      Yes      $15.00     $1.79    $13.21
AR      GTE   OCP                  Unlimited Usage to Each Additional 
                                    Designated Number                        MRC       Yes      Yes      $10.00     $1.19     $8.81
                 
                            Wide Area Telecommunications Services:
                            800 Service:
AR      GTE   WATS               Access Line                                 MRC       Yes      Yes      $38.00     $4.53    $33.47
                                 Usage Rates (per Hour):

</TABLE>
                                    Page 24

<PAGE>   111
                         GTE SOUTHWEST INC. ARKANSAS
                           RESALE PRODUCTS & SERVICES
                    GTE SOUTHWEST GENERAL EXCHANGE TARIFF

<TABLE>
<CAPTION>
                                                                          BILLING   RESALE   DISCOUNT  RETAIL   AVOIDED   RESALE
ST      CO       SEC           SERVICE DESCRIPTION                         TYPE    POSITION  POSITION   RATE      COST     RATE
- --      ---      ---           -------------------                        ------   --------  --------  ------   -------   ------
<S>    <C>      <C>           <C>                                        <C>       <C>        <C>    <C>       <C>       <C> 

AR      GTE      WATS              Day - First 10 Hours                    USAGE      Yes      Yes     $18.00    $2.15     $15.85
AR      GTE      WATS              Day - Next 15 Hours                     USAGE      Yes      Yes     $16.20    $1.93     $14.27
AR      GTE      WATS              Day - Next 25 Hours                     USAGE      Yes      Yes     $14.40    $1.72     $12.68
AR      GTE      WATS              Day - Over 50 Hours                     USAGE      Yes      Yes     $12.60    $1.50     $11.10

AR      GTE      WATS              Evening - First 10 Hours                USAGE      Yes      Yes     $15.00    $1.79     $13.21
AR      GTE      WATS              Evening - Next 15 Hours                 USAGE      Yes      Yes     $13.20    $1.57     $11.63
AR      GTE      WATS              Evening - Next 25 Hours                 USAGE      Yes      Yes     $12.00    $1.43     $10.57
AR      GTE      WATS              Evening - Over 50 Hours                 USAGE      Yes      Yes     $10.80    $1.29      $9.51

AR      GTE      WATS              Night/Weekend - First 10 Hours          USAGE      Yes      Yes      $9.60    $1.15      $8.45
AR      GTE      WATS              Night/Weekend - Next 15 Hours           USAGE      Yes      Yes      $8.40    $1.00      $7.40
AR      GTE      WATS              Night/Weekend - Next 25 Hours           USAGE      Yes      Yes      $7.20    $0.86      $6.34
AR      GTE      WATS              Night/Weekend - Over 50 Hours           USAGE      Yes      Yes      $6.60    $0.79      $5.81

                            Outward WATS:
AR      GTE      WATS            Access Line                                MRC       Yes      Yes     $38.00    $4.53     $33.47
                                 Usage Rates (per Hour):
AR      GTE      WATS              Day - First 10 Hours                    USAGE      Yes      Yes     $10.80    $1.29      $9.51
AR      GTE      WATS              Day - Next 15 Hours                     USAGE      Yes      Yes      $9.60    $1.15      $8.45
AR      GTE      WATS              Day - Next 25 Hours                     USAGE      Yes      Yes      $8.40    $1.00      $7.40
AR      GTE      WATS              Day - Over 50 Hours                     USAGE      Yes      Yes      $6.60    $0.79      $5.81

AR      GTE      WATS              Evening - First 10 Hours                USAGE      Yes      Yes      $9.60    $1.15      $8.45
AR      GTE      WATS              Evening - Next 15 Hours                 USAGE      Yes      Yes      $8.40    $1.00      $7.40
AR      GTE      WATS              Evening - Next 25 Hours                 USAGE      Yes      Yes      $7.20    $0.86      $6.34
AR      GTE      WATS              Evening - Over 50 Hours                 USAGE      Yes      Yes      $6.00    $0.72      $5.28

AR      GTE      WATS              Night/Weekend - First 10 Hours          USAGE      Yes      Yes      $6.60    $0.79      $5.81
AR      GTE      WATS              Night/Weekend - Next 15 Hours           USAGE      Yes      Yes      $6.00    $0.72      $5.28
AR      GTE      WATS              Night/Weekend - Next 25 Hours           USAGE      Yes      Yes      $5.40    $0.64      $4.76
AR      GTE      WATS              Night/Weekend - Over 50 Hours           USAGE      Yes      Yes      $4.80    $0.57      $4.23

                            Business Line 800:
AR      GTE      WATS       Access Line                                     MRC       Yes      Yes      $5.00    $0.60      $4.40

                            Usage Rates:
                                 Per Minute of Use Plan:
AR      GTE      WATS              Day Rate                                USAGE      Yes      Yes      $0.20    $0.02      $0.18
AR      GTE      WATS              Evening/Night/Weekend Rate              USAGE      Yes      Yes      $0.18    $0.02      $0.16
                                 Two Hour Block Plan:
AR      GTE      WATS              Initial Period                          USAGE      Yes      Yes     $21.60    $2.58     $19.02
AR      GTE      WATS              Each Additional Minute                  USAGE      Yes      Yes      $0.17    $0.02      $0.15
</TABLE>


                                     Page 25

<PAGE>   112
                     GTE SOUTHWEST INC. ARKANSAS TAFIFFS
                          RESALE PRODUCTS & SERVICES
                  GTE SOUTHWEST INC. GENERAL EXCHANGE TARIFF


<TABLE>
<CAPTION>
                                                                           BILLING   RESALE  DISCOUNT   RETAIL   AVOIDED   RESALE
ST      CO       SEC           SERVICE DESCRIPTION                           TYPE   POSITION POSITION    RATE     COST      RATE
- --      ---      ---           -------------------                         -------  -------- --------   ------    ------   ------
<S>    <C>      <C>         <C>                                            <C>       <C>     <C>      <C>       <C>      <C> 

                                 Five Hour Block Plan:
AR      GTE      WATS              Initial Period                            USAGE     Yes     Yes      $45.00     $5.37   $39.63
AR      GTE      WATS              Each Additional Minute                    USAGE     Yes     Yes       $0.14     $0.02    $0.12

                            Change Charges:
AR      GTE      WATS            Number of Terminations Changed
                                  (1 or 2 Terms)                               NRC      Yes      No      $20.00     N/A     $20.00
AR      GTE      WATS            Number of Terminations Changed
                                  (3 to 10 Terms)                              NRC      Yes      No      $90.00     N/A     $90.00
AR      GTE      WATS            Number of Terminations Changed 
                                  (Over 10 Terms)                              NRC      Yes      No     $225.00     N/A    $225.00

AR      GTE      WATS       Change Billing Arrangement Charge                  NRC      Yes      No      $12.50     N/A     $12.50

AR      GTE      WATS       Charge to Change Usage Plans                       NRC      Yes      No       $5.00     N/A      $5.00

AR      GTE      WATS       Call Detail Information per Account Charge         NRC      No       No      $12.50     N/A      N/A

                            Residence Line 800:
AR      GTE      WATS       Access Line                                        MRC      Yes     Yes       $3.95     $0.47    $3.48

                            Usage Rates:
                               Per Minute of Use Plan:
AR      GTE      WATS            Day Rate                                     USAGE     Yes     Yes       $0.20     $0.02    $0.18
AR      GTE      WATS            Evening/Night/Weekend Rate                   USAGE     Yes     Yes       $0.18     $0.02    $0.16
                               One Hour Block Plan:
AR      GTE      WATS            Initial Period                               USAGE     Yes     Yes       $9.00     $1.07    $7.93
AR      GTE      WATS            Each Additional Minute                       USAGE     Yes     Yes       $0.14     $0.02    $0.12
                               Two Hour Block Plan:
AR      GTE      WATS            Initial Period                               USAGE     Yes     Yes      $15.00     $1.79   $13.21
AR      GTE      WATS            Each Additional Minute                       USAGE     Yes     Yes       $0.12     $0.01    $0.11

                            Change Charges:
AR      GTE      WATS          Number of Terminations Changed (1 or 2 Terms)   NRC      Yes      No      $20.00     N/A     $20.00
AR      GTE      WATS          Number of Terminations Changed (3 to 10 Terms)  NRC      Yes      No      $90.00     N/A     $90.00
AR      GTE      WATS          Number of Terminations Changed (Over 10 Terms)  NRC      Yes      No     $225.00     N/A    $225.00

AR      GTE      WATS       Change Billing Arrangement Charge                  NRC      Yes      No      $12.50     N/A     $12.50

AR      GTE      WATS       Charge to Change Usage Plans                       NRC      Yes      No       $5.00     N/A      $5.00

AR      GTE      WATS       Call Detail Information per Account Charge         NRC      No       No      $12.50     N/A      N/A
</TABLE>


                                    Page 26

<PAGE>   113


                         GTE SOUTHWEST INC. ARKANSAS
                           RESALE PRODUCTS & SERVICES
                  GTE SOUTHWEST INC. GENERAL EXCHANGE TARIFF


<TABLE>
<CAPTION>

                                                                                BILLING  RESALE   DISCOUNT  RETAIL  AVOIDED  RESALE
ST      CO        SEC           SERVICE DESCRIPTION                               TYPE  POSITION  POSITION   RATE    COST     RATE
- --      ---       ---           -------------------                             ------- --------  --------  ------  -------  ------
<S>  <C>          <C>  <C>                                                       <C>     <C>       <C>    <C>       <C>     <C> 
                   5    SPECIAL ACCESS SERVICES
                   5        DIGITAL DATA SERVICE - Asso. w/Sw. Data service
AR      GTE        5        SPECIAL TRANSPORT PER AIRLINE MILE -56 KBPS           MRC      Yes       No      $5.33    N/A     $5.33
                                                                                                                          
                   5        HIGH CAPACITY DS1                                                                             
                                                                                                                          
AR      GTE        5        SAL - FIRST SYSTEM                                    NRC      Yes       No    $900.00    N/A   $900.00
AR      GTE        5        FIRST SYSTEM - MONTHLY                                MRC      Yes       No    $325.00    N/A   $325.00
AR      GTE        5        SAL - EACH ADDITIONAL SYSTEM                          NRC      Yes       No    $130.00    N/A   $130.00
AR      GTE        5        EACH ADDITIONAL - MONTHLY                             MRC      Yes       No    $160.00    N/A   $160.00
AR      GTE        5        SPECIAL TRANSPORT TERMINATION                         MRC      Yes       No     $45.00    N/A    $45.00
AR      GTE        5        SPECIAL TRANSPORT - PER AIRLINE MILE                  MRC      Yes       No     $12.97    N/A    $12.97



                            1) If service is priced below cost, a discount will
                            not apply.

                            2) The retail Rates above do not include the End
                            User Subscriber Line Charge (EUSLC). The ALEC will
                            be responsible for the business or residential
                            charge, $6.00 and $3.50, respectively.

                            3) This document is subject to the terms and
                            conditions of the nondisclosure agreement between
                            the CLEC and GTE.

</TABLE>


                                    Page 27

<PAGE>   114
                          GTE ARKANSAS (CONTEL) TARIFFS
                           RESALE PRODUCTS & SERVICES
                  GTE ARKANSAS (CONTEL) GENERAL EXCHANGE TARIFF

<TABLE>
<CAPTION>

                                                                    BILLING     RESALE    DISCOUNT    RETAIL    AVOIDED    RESALE
ST   CO   RULE  SEC              SERVICE DESCRIPTION                  TYPE     POSITION   POSITION     RATE      COST       RATE
<S>  <C>  <C>   <C>    <C>                                             <C>       <C>        <C>       <C>         <C>       <C>
                       BASIC LOCAL RATE SCHEDULES:                 
                         Schedule "A" Improved Exchanges  1-PARTY  
AR   CON     2    4      Business Individual Line                      MRC       Yes        Yes       $16.00      $1.91     $14.09
AR   CON     2    4      Business Trunk                                MRC       Yes        Yes       $16.00      $1.91     $14.09
AR   CON     2    4      Key Business Line                             MRC       Yes        Yes       $16.00      $1.91     $14.09
AR   CON     2    4      Coin Line                                     MRC       Yes        No        $21.55        N/A     $21.55
AR   CON     2    4      Customer Owned Pay Telephone Service          MRC       Yes        No        $16.00        N/A     $16.00
             2                                                                                                           
AR   CON     2    4      Schedule "B" Unimproved Exchanges                                                               
AR   CON     2    4      Business Individual Line                      MRC       Yes        Yes       $10.00      $1.19      $8.81
AR   CON     2    4      Business Trunk                                MRC       Yes        Yes       $10.00      $1.19      $8.81
AR   CON     2    4      Key Business Line                             MRC       Yes        Yes       $10.00      $1.19      $8.81
AR   CON     2    4      Business Two Party                            MRC       Yes        Yes        $9.00      $1.07      $7.93
AR   CON     2    4      Business Four Party (Rural Only)              MRC       Yes        Yes        $8.00      $0.95      $7.05
AR   CON     2    4      Coin Line                                     MRC       Yes        No        $15.55        N/A     $15.55
AR   CON     2    4      Customer Owned Pay Telephone Service          MRC       Yes        No        $10.00        N/A     $10.00
AR   CON     2    4      Residence One party                           MRC       No         No         $5.00        N/A        N/A
AR   CON     2    4      Residence Two party                           MRC       No         No         $4.50        N/A        N/A
AR   CON     2    4      Residence four party                          MRC       No         No         $4.00        N/A        N/A
AR   CON     2    4      Residence four party rural                    MRC       No         No         $4.00        N/A        N/A
             2                                                                                                           
             2    4      EXTENDED AREA SERVICE RATES                                                                     
AR   CON     2    4      Rate Group 1 (1-3000)                         MRC       Yes        Yes        $2.10      $0.25      $1.85
AR   CON     2    4      Rate Group II (3001 -18,000)                  MRC       Yes        Yes        $2.75      $0.33      $2.42
AR   CON     2    4      Rate Group II I (-18,000 +)                   MRC       Yes        Yes        $4.15      $0.50      $3.65
             2                                                                                                           
             2           GENERAL SERVICES                                                                                
AR   CON     2    5      Answer Supervision per line                   MRC       Yes        No         $4.55        N/A      $4.55
             2                                                                                                           
             2           Custom Calling Features                                                                         
             2           individual services                                                                             
AR   CON     2    5      Call Forwarding - variable per In                                                               
                           -Business                                   MRC       Yes        Yes        $2.50      $0.30      $2.20
AR   CON     2    5      Call Forwarding - variable per In                                                               
                           -Residence                                  MRC       Yes        Yes        $2.50      $0.30      $2.20
AR   CON     2    5      Call Forwarding Multipath - Business          MRC       Yes        Yes        $2.50      $0.30      $2.20
AR   CON     2    5      Call Forwarding Multipath - Residence         MRC       Yes        Yes        $2.50      $0.30      $2.20
AR   CON     2    5      Call Screening per line-Incoming -3rd                                                           
                           No. bus                                     MRC       Yes        Yes        $2.50      $0.30      $2.20
AR   CON     2    5      Call Screening per line-Incoming -3rd                                                           
                           No. Res                                     MRC       Yes        Yes        $2.50      $0.30      $2.20
AR   CON     2    5      Call Screening per line-Incoming                                                                
                           -collect. Bus                               MRC       Yes        Yes        $2.50      $0.30      $2.20
AR   CON     2    5      Call Screening per line-Incoming                                                                
                           -collect. Res                               MRC       Yes        Yes        $2.50      $0.30      $2.20
AR   CON     2    5      Call Screening per line-Incoming                                                                
                           -collect./3rd no. - Bus                     MRC       Yes        Yes        $4.00      $0.48      $3.52
AR   CON     2    5      Call Screening per line-Incoming                                                                
                           -collect./3rd no. - Res                     MRC       Yes        Yes        $4.00      $0.48      $3.52
AR   CON     2    5      Call Screening per line-Outgoing- Bus         MRC       Yes        Yes        $7.50      $0.89      $6.61
AR   CON     2    5      Call Screening per line-Outgoing- res         MRC       Yes        Yes        $7.50      $0.89      $6.61
</TABLE>

                                    Page 1
<PAGE>   115

                          GTE ARKANSAS (CONTEL) TARIFFS
                           RESALE PRODUCTS & SERVICES
                  GTE ARKANSAS (CONTEL) GENERAL EXCHANGE TARIFF

<TABLE>
<CAPTION>
                                                                    BILLING     RESALE    DISCOUNT    RETAIL    AVOIDED    RESALE
ST   CO   RULE  SEC              SERVICE DESCRIPTION                  TYPE     POSITION   POSITION     RATE      COST       RATE
<S> <C>    <C>  <C>    <C>                                             <C>       <C>        <C>       <C>        <C>        <C>

AR   CON     2    5      Fixed Call Forwarding/Busy - Business         MRC       Yes        Yes        $1.25      $0.15      $1.10
AR   CON     2    5      Fixed Call Forwarding/Busy - Residence        MRC       Yes        Yes        $1.25      $0.15      $1.10
AR   CON     2    5      Fixed Call Forwarding/No Answer                                                                    
                           - Business                                  MRC       Yes        Yes        $1.25      $0.15      $1.10
AR   CON     2    5      Fixed Call Forwarding/No Answer - Residence   MRC       Yes        Yes        $1.25      $0.15      $1.10
AR   CON     2    5      Fixed Call Forwarding/Busy/No Answer                                                               
                           - Business                                  MRC       Yes        Yes        $1.50      $0.18      $1.32
AR   CON     2    5      Fixed Call Forwarding/Busy/No Answer                                                               
                           - Residence                                 MRC       Yes        Yes        $1.50      $0.18      $1.32
AR   CON     2    5      Call Forward/Busy/No Answer - Business                                                             
                           (Variable)                                  MRC       Yes        Yes        $3.50      $0.42      $3.08
AR   CON     2    5      Call Forward/Busy/No Answer - Residence                                                            
                           (Variable)                                  MRC       Yes        Yes        $3.50      $0.42      $3.08
AR   CON     2    5      Call Waiting, per line Business               MRC       Yes        Yes        $3.50      $0.42      $3.08
AR   CON     2    5      Call waiting, per line, Residence             MRC       Yes        Yes        $3.50      $0.42      $3.08
AR   CON     2    5         Remote Call Forwarding - BUS/ - first                                                           
                              access path                              MRC       Yes        Yes       $16.00      $1.91     $14.09
AR   CON     2    5         Remote Call Forwarding - RES - first                                                            
                              access path                              MRC       Yes        Yes       $16.00      $1.91     $14.09
AR   CON     2    5         Remote Call Forwarding - BUS - additional                                                       
                              path                                     MRC       Yes        Yes       $16.00      $1.91     $14.09
AR   CON     2    5         Remote Call Forwarding - RES - additional                                                       
                              path                                     MRC       Yes        Yes       $16.00      $1.91     $14.09
AR   CON     2    5      Smart Ring - One Feature -Business            MRC       Yes        Yes        $6.00      $0.72      $5.28
AR   CON     2    5      Smart Ring - One Feature - Residence          MRC       Yes        Yes        $6.00      $0.72      $5.28
AR   CON     2    5      Speed Call 8 - Business                       MRC       Yes        Yes        $2.50      $0.30      $2.20
AR   CON     2    5      Speed Call 8 - Residence                      MRC       Yes        Yes        $2.50      $0.30      $2.20
AR   CON     2    5      Speed Call 30 - Business                      MRC       Yes        Yes        $3.50      $0.42      $3.08
AR   CON     2    5      Speed Call 30 - Residence                     MRC       Yes        Yes        $3.50      $0.42      $3.08
AR   CON     2    5      Three Way Calling - One Feature - Business    MRC       Yes        Yes        $3.50      $0.42      $3.08
AR   CON     2    5      Three Way Calling - One Feature - Residence   MRC       Yes        Yes        $3.50      $0.42      $3.08
AR   CON     2    5      Call Wait, Call Fwd, 3-way & speed call 30 per                                                     
                           ln -bus                                     MRC       Yes        Yes        $9.95      $1.19      $8.76
AR   CON     2    5      Call Wait, Call Fwd, 3-way & speed call 30 per                                                     
                           ln -res                                     MRC       Yes        Yes        $9.95      $1.19      $8.76
AR   CON     2    5      SMARTER Package - Business                    MRC       Yes        Yes        $6.00      $0.72      $5.28
AR   CON     2    5      SMARTER Package - Residence          (GF)     MRC       Yes        Yes        $5.00      $0.60      $4.40
AR   CON     2    5      Smart Ring with a Pac - Business              MRC       Yes        Yes        $3.00      $0.36      $2.64
AR   CON     2    5      Smart Ring with a Pac - Residence    (GF)     MRC       Yes        Yes        $3.00      $0.36      $2.64
             2                                                                                                              
             2           CLASS Vertical Services:                                                                           
AR   CON     2    5      Automatic Busy Redial - Business              MRC       Yes        Yes        $6.00      $0.72      $5.28
AR   CON     2    5      Automatic Busy Redial - Residence             MRC       Yes        Yes        $5.00      $0.60      $4.40
AR   CON     2    5      Automatic Call Return - Business              MRC       Yes        Yes        $6.00      $0.72      $5.28
AR   CON     2    5      Automatic Call Return - Residence             MRC       Yes        Yes        $5.00      $0.60      $4.40
AR   CON     2    5      Call Block - Business                         MRC       Yes        Yes        $4.00      $0.48      $3.52
AR   CON     2    5      Call Block - Residence                        MRC       Yes        Yes        $3.00      $0.36      $2.64
AR   CON     2    5      Call Tracing per line - Bus                   MRC       Yes        Yes        $6.00      $0.72      $5.28
AR   CON     2    5      Call Tracing per line - Res                   MRC       Yes        Yes        $5.00      $0.60      $4.40
AR   CON     2    5      Special Call Acceptance - Business            MRC       Yes        Yes        $3.00      $0.36      $2.64
AR   CON     2    5      Special Call Acceptance - Residence           MRC       Yes        Yes        $2.00      $0.24      $1.76
AR   CON     2    5      Special Call Forwarding - Business            MRC       Yes        Yes        $6.00      $0.72      $5.28
AR   CON     2    5      Special Call Forwarding - Residence           MRC       Yes        Yes        $5.00      $0.60      $4.40
AR   CON     2    5      Special Call Waiting - Business      (GF)     MRC       Yes        Yes        $6.00      $0.72      $5.28
AR   CON     2    5      Special Call Waiting - Residence     (GF)     MRC       Yes        Yes        $5.00      $0.60      $4.40
AR   CON     2    5      VIP Alert - Business                          MRC       Yes        Yes        $4.00      $0.48      $3.52
</TABLE>

                                    Page 2
<PAGE>   116
                          GTE ARKANSAS (CONTEL) TARIFFS
                           RESALE PRODUCTS & SERVICES
                  GTE ARKANSAS (CONTEL) GENERAL EXCHANGE TARIFF

<TABLE>
<CAPTION>
                                                                    BILLING     RESALE    DISCOUNT    RETAIL    AVOIDED    RESALE
ST   CO   RULE  SEC              SERVICE DESCRIPTION                  TYPE     POSITION   POSITION     RATE      COST       RATE
<S> <C>    <C>  <C>    <C>                                           <C>         <C>        <C>       <C>        <C>       <C>

AR   CON     2    5      VIP Alert - Residence                         MRC       Yes        Yes         $3.00     $0.36      $2.64
AR   CON     2    5      SmartCall Pak 4400 - Residence                MRC       Yes        Yes         $8.75     $1.04      $7.71
AR   CON     2    5      SmartCall Pak 4900 - Residence                MRC       Yes        Yes        $13.25     $1.58     $11.67
AR   CON     2    5      Calling Number ID - Business                  MRC       Yes        Yes        $10.00     $1.19      $8.81
AR   CON     2    5      Calling Number ID - Residence                 MRC       Yes        Yes         $7.00     $0.84      $6.16
AR   CON     2    5      Caller ID name and number (Residence)         MRC       Yes        Yes         $7.95     $0.95      $7.00
AR   CON     2    5      Caller ID name and number (Business)          MRC       Yes        Yes        $11.50     $1.37     $10.13
AR   CON     2    5      Anonymous Caller Rejection (Residence)        MRC       Yes        Yes         $1.00     $0.12      $0.88
AR   CON     2    5      Anonymous Caller Rejection (Business)         MRC       Yes        Yes         $1.00     $0.12      $0.88
             2                                                                                                              
             2    5      TEL-TEEN SERVICE CUSTOM FEATURE                                                                    
                           PACKAGES                           (GF)                                                          
                                                                                                                            
AR   CON     2    5      Touch Call, Three-Way Calling, Speed                                                               
                           Call 8, Toll Control               (GF)     MRC       Yes        Yes         $3.50     $0.42      $3.08
AR   CON     2    5      Touch Call, Call Waiting, Speed                                                                    
                           Call 8, Toll Control               (GF)     MRC       Yes        Yes         $3.00     $0.36      $2.64
AR   CON     2    5      Touch Call, Three-Way Calling, Toll                                                                
                           Control                            (GF)     MRC       Yes        Yes         $2.00     $0.24      $1.76
AR   CON     2    5      Touch Call, Call Waiting, Speed                                                                    
                           Call 8                             (GF)     MRC       Yes        Yes         $3.00     $0.36      $2.64
             2                                                                                                              
             2    5      Direct Inward Dialing Service                                                                      
AR   CON     2    5      DID Trunk Terminations (Per Trunk) MRC        MRC       Yes        Yes        $25.00     $2.98     $22.02
AR   CON     2    5      DID Trunk Terminations (Per Trunk) NRC        NRC       Yes        No        $150.00       N/A    $150.00
AR   CON     2    5      DID Station Numbers-Block of 20 mrc           MRC       Yes        Yes         $8.00     $0.95      $7.05
AR   CON     2    5      DID Station Numbers-Block of 100 mrc          MRC       Yes        Yes        $22.00     $2.62     $19.38
             2                                                                                                              
             2           DIRECTORY ASSISTANCE SERVICE                                                                       
AR   CON     2    5      Customer Dialed Calling Card                 USAGE      Yes        No          $0.35       N/A      $0.35
AR   CON     2    5      All other (Opr.assist sent paid,third                                                            
                           no.,credit card)                           USAGE      Yes        No          $0.90       N/A      $0.90
             2                                                                                                              
AR   CON     2    5      DIRECTORY LISTINGS                                                                                 
AR   CON     2    5      Regular Extra Listing - Residential - Each    MRC        No        No            N/A       N/A        N/A
AR   CON     2    5      Regular Extra Listing - Business - Each       MRC        No        No            N/A       N/A        N/A
AR   CON     2    5      Foreign Listings - Residential                MRC        No        No            N/A       N/A        N/A
AR   CON     2    5      Foreign Listings - Business                   MRC        No        No            N/A       N/A        N/A
AR   CON     2    5      Nonlisted Service, each                       MRC        No        No            N/A       N/A        N/A
AR   CON     2    5      Nonpublished Service, each                    MRC        No        No            N/A       N/A        N/A
AR   CON     2    5      Directory Connect Plus Service               USAGE      Yes        No          $0.50       N/A      $0.50
             2                                                                                                              
             2    5      FOREIGN SWITCH OFC SVC (MILEAGE ADD) NEW                                                           
                           CUST. ONLY                                                                                       
AR   CON     2    5      Airline Mileage - To 125 miles                MRC       Yes        Yes        $15.00     $1.79     $13.21
AR   CON     2    5      Airline Mileage - 125 to 425 miles            MRC       Yes        Yes        $22.00     $2.62     $19.38
AR   CON     2    5      Airline Mileage - Over 425 miles              MRC       Yes        Yes        $29.00     $3.46     $25.54
             2                                                                                                              
AR   CON     2    5      Rotary Hunt Line Service (Each arrangement)   MRC       Yes        Yes         $3.00     $0.36      $2.64
             2                                                                                                              
             2    5      INTRAEXCHANGE MILEAGE                                                                              
AR   CON     2    5      Extension Lines - Exchanges                                                                        
AR   CON     2    5      a. Single pr. off prem, per 1/4 mi or frac    MRC       Yes        Yes         $1.05     $0.13      $0.92
</TABLE>

                                    Page 3
<PAGE>   117
                          GTE ARKANSAS (CONTEL) TARIFFS
                           RESALE PRODUCTS & SERVICES
                  GTE ARKANSAS (CONTEL) GENERAL EXCHANGE TARIFF

<TABLE>
<CAPTION>
                                                                    BILLING     RESALE    DISCOUNT    RETAIL    AVOIDED    RESALE
ST   CO   RULE  SEC              SERVICE DESCRIPTION                  TYPE     POSITION   POSITION     RATE      COST       RATE
<S> <C>    <C>  <C>    <C>                                           <C>         <C>        <C>       <C>        <C>       <C>
AR   CON     2    5      b. Single pr. on prem,term beyond 150 ft 
                           per 1/4 mi                                  MRC       Yes        Yes        $1.05      $0.13     $0.92
             2    5      Extension Lines - Former Systems of Ark.                                                           
                           Exchanges                                   MRC       Yes        Yes        $0.00      $0.00     $0.00
AR   CON     2    5      a. Single pr. off prem, per 1/4 mi or frac    MRC       Yes        Yes        $0.60      $0.07     $0.53
             2    5      b.1. Single pr. on prem=1st 300 ft            MRC       Yes        Yes        $0.00      $0.00     $0.00
AR   CON     2    5      b.2. Single pr. on prem=each add. 200 ft.                                                          
                           of ckt.                                     MRC       Yes        Yes        $0.10      $0.01     $0.09
             2                                                                                                              
             2    5      Tie line - Exchanges                                                                               
AR   CON     2    5      Tie line per 1/4 mile                         MRC       Yes        Yes        $1.05      $0.13     $0.92
             2                                                                                                              
             2    5      Tie line - Former Systems of Ark. Exchanges                                                        
AR   CON     2    5      a. Single pr. off prem, per 1/4 mi or frac    MRC       Yes        Yes        $0.60      $0.07     $0.53
             2    5      b.1. Single pr. on prem=1st 300 ft                                            $0.00                
AR   CON     2    5      b.2. Single pr. on prem=each add. 200 ft                                                           
                           of ckt.                                     MRC       Yes        Yes        $0.10      $0.01     $0.09
             2                                                                                                              
AR   CON     2    5      School to Home                                                                                     
AR   CON     2    5      First 1/4 mile or fraction                    MRC       Yes        No         $1.30        N/A     $1.30
             2    5      Additional 1/4 mile or fraction               MRC       Yes        No         $1.30        N/A     $1.30
             2                                                                                                              
             2    5      900 Call Restriction                                                                               
AR   CON     2    5      Per line equipped (Business only)  NRC        NRC       Yes        No         $8.00        N/A     $8.00
             2                                                                                                              
             2    5      Operator Assisted Local Calls (Svc. Chgs.)                                                         
AR   CON     2    5      Customer Dialed Calling Card                 USAGE      Yes        No         $0.35        N/A     $0.35
AR   CON     2    5      Opr Station to Station - Opr. sent paid,                                                           
                           collect, third no, cre. card               USAGE      Yes        No         $0.90        N/A     $0.90
AR   CON     2    5      Person to Person                             USAGE      Yes        No         $2.50        N/A     $2.50
             2                                                                                                              
AR   CON     2    5      PRIVATE LINES AND EQUIPMENT - INTRAEXCHANGE                                                        
AR   CON     2    5      Signal Grade                                                                                       
AR   CON     2    5      Mileage - first 1/4 mile or fraction          MRC       Yes        No         $6.25        N/A     $6.25
AR   CON     2    5      Additional 1/4 mile or fraction               MRC       Yes        No         $2.20        N/A     $2.20
AR   CON     2    5                                                                                                         
AR   CON     2    5      Voice Grade                                                                                        
AR   CON     2    5      Mileage - first 1/4 mile or fraction          MRC       Yes        No         $6.25        N/A     $6.25
AR   CON     2    5      Additional 1/4 mile or fraction               MRC       Yes        No         $2.20        N/A     $2.20
AR   CON     2    5                                                                                                         
AR   CON     2    5      Former GTE Systems of Arkansas - Each local                                                        
                           Channel or Ntwk                                                                                  
AR   CON     2    5      Mileage - first 1/4 mile or fraction          MRC       Yes        No         $4.00        N/A     $4.00
AR   CON     2    5      Additional 1/4 mile or fraction               MRC       Yes        No         $1.00        N/A     $1.00
             2                                                                                                              
             2                                                                                                              
             2    5      Verification and Emer. interrupt Operator                                                          
AR   CON     2    5      Line verify - each occurrence                USAGE      Yes        No         $1.50        N/A     $1.50
AR   CON     2    5      Emergency Interrupt - Each occurrence        USAGE      Yes        No         $2.50        N/A     $2.50
             2                                                                                                              
             2    6      SERVICE CHARGES                                                                                    
</TABLE>

                                    Page 4
<PAGE>   118
                        GTE ARKANSAS (CONTEL) TARIFFS
                          RESALE PRODUCTS & SERVICES
                GTE ARKANSAS (CONTEL) GENERAL EXCHANGE TARIFF

<TABLE>
<CAPTION>
                                                                    BILLING     RESALE    DISCOUNT    RETAIL    AVOIDED    RESALE
ST   CO   RULE  SEC              SERVICE DESCRIPTION                  TYPE     POSITION   POSITION     RATE      COST       RATE
<S> <C>    <C>  <C>    <C>                                           <C>         <C>        <C>       <C>        <C>       <C>
                  
AR   CON     2    6      Primary Svc. Ord. Chg-Each - Residence        NRC        No       No         $15.00        N/A       N/A
AR   CON     2    6      Primary Svc. Ord. Chg-Each - Bus. & Coin      NRC        No       No         $23.00        N/A       N/A
AR   CON     2    6      Primary Svc. Ord. Chg-Each - key lines/trks   NRC        No       No         $23.00        N/A       N/A
AR   CON     2    6      Secondary Svc. Ord. Chg-Each - Residence      NRC        No       No          $8.65        N/A       N/A
AR   CON     2    6      Secondary Svc. Ord. Chg-Each - Business       NRC        No       No         $14.80        N/A       N/A
AR   CON     2    6      Secondary Svc. Ord. Chg-Each -                                                                   
                           key/lns/trks                                NRC        No       No         $14.80        N/A       N/A
AR   CON     2    6      Line Connect Chg. - Each - Residence          NRC       Yes       No         $12.00        N/A    $12.00
AR   CON     2    6      Line Connect Chg. - Each - Business and Coin  NRC       Yes       No         $12.00        N/A    $12.00
AR   CON     2    6      Line Connect Chg. - Each - Key Lns/trks       NRC       Yes       No         $12.00        N/A    $12.00
AR   CON     2    6      Trip Charge, Each - Residence                 NRC       Yes       No          $7.00        N/A     $7.00
AR   CON     2    6      Trip Charge, Each - Bus & Coin                NRC       Yes       No          $7.00        N/A     $7.00
AR   CON     2    6      Trip Charge, Each - Key Lines and Trunks      NRC       Yes       No          $7.00        N/A     $7.00
             2                                                                                                             
AR   CON     2    6      Link up Arkansas - assistance for initiating                                                      
                           Svc.50% or 30 nrc                           NRC        No       No          $0.50        N/A       N/A
             2                                                                                                             
             2    7      DIGITAL CENTREX SERVICE                                                                           
             2    7      Intragroup Calling Svc. - Monthly per                                                             
                           line 1-200 lns.                                                                                 
AR   CON     2    7      0 - .5 miles                                  MRC       Yes       Yes         $2.40      $0.29     $2.11
AR   CON     2    7      .6 - 1.0 miles                                MRC       Yes       Yes         $3.60      $0.43     $3.17
AR   CON     2    7      1.1 - 1.5 miles                               MRC       Yes       Yes         $4.80      $0.57     $4.23
AR   CON     2    7      1.6 - 2.0 miles                               MRC       Yes       Yes         $6.05      $0.72     $5.33
             2                                                                                                             
             2           Basic Service per line                                                                            
AR   CON     2    7      Customer with 2 lines each                    MRC       Yes       Yes         $3.50      $0.42     $3.08
AR   CON     2    7      Customer with 3 lns or more, but less                                                            
                           than 7 lns                                  MRC       Yes       Yes         $3.00      $0.36     $2.64
AR   CON     2    7      Customer with 7 lines or more, each           MRC       Yes       Yes         $2.50      $0.30     $2.20
             2                                                                                                             
             2    7      Enhanced Services and Features (per line)                                                         
AR   CON     2    7      Business Set Service (excludes CPE)           MRC       Yes       Yes         $2.45      $0.29     $2.16
AR   CON     2    7      Enhanced Business Service                     MRC       Yes       Yes         $2.95      $0.35     $2.60
AR   CON     2    7      Station Message Detail Recorder               MRC       Yes       Yes         $2.95      $0.35     $2.60
AR   CON     2    7      Enhanced Station Message Detail Recorder      MRC       Yes       Yes         $4.15      $0.50     $3.65
AR   CON     2    7      Automatic Route Selection                     MRC       Yes       Yes         $2.05      $0.24     $1.81
AR   CON     2    7      Datapath Basic                                MRC       Yes       Yes         $4.50      $0.54     $3.96
AR   CON     2    7      Hospital Communications                       MRC       Yes       Yes         $0.50      $0.06     $0.44
AR   CON     2    7      Console alerting                              MRC       Yes       Yes         $0.50      $0.06     $0.44
AR   CON     2    7      Electronic Switched Network                   MRC       Yes       Yes         $5.10      $0.61     $4.49
AR   CON     2    7      Cut-Thru Dialing                              MRC       Yes       Yes         $0.50      $0.06     $0.44
             2                                                                                                             
             2    7      MOBILE TELEPHONE SERVICE                                                                          
AR   CON     2    7      Mobile Telephone access line                  MRC       Yes       Yes        $40.00      $4.77    $35.23
AR   CON     2    7      Mobile Radio Paging Access                    MRC       Yes       Yes         $7.40      $0.88     $6.52
AR   CON     2    7      foreign msg. chg. - First min.               USAGE      Yes       Yes         $0.20      $0.02     $0.18
AR   CON     2    7      Foreign Each add. min. or fraction                                                                
                           thereafter                                 USAGE      Yes       Yes         $0.20      $0.02     $0.18
             2                                                                                                             
</TABLE>

                                    Page 5
<PAGE>   119
                          GTE ARKANSAS (CONTEL) TARIFFS
                           RESALE PRODUCTS & SERVICES
                  GTE ARKANSAS (CONTEL) GENERAL EXCHANGE TARIFF

<TABLE>
<CAPTION>
                                                                    BILLING     RESALE    DISCOUNT    RETAIL    AVOIDED    RESALE
ST   CO   RULE  SEC              SERVICE DESCRIPTION                  TYPE     POSITION   POSITION     RATE      COST       RATE
<S> <C>    <C>  <C>    <C>                                           <C>         <C>        <C>       <C>        <C>       <C>
                                                                                                                  
             2                                                                             
             2                                                                             
             2    9      SWITCHED DATA CUSTOMER LINE SERVICES
AR   CON     2    9      SW Data Cust Ln Svcs - Low Speed Single Ln.   MRC       Yes       Yes         $50.00      $5.97    $44.04
AR   CON     2    9      SW Data Cust Ln Svcs - Low Speed Single Ln.                                                      
                           INSTALL NRC                                 NRC       Yes       No          $50.00        N/A    $50.00
AR   CON     2    9      SW Data Cust Ln Svcs - Low Speed CentrEX      MRC       Yes       Yes         $50.00      $5.97    $44.04
AR   CON     2    9      SW Data Cust Ln Svcs - Low Speed CentrEX                                                         
                           INSTALL NRC                                 NRC       Yes       No          $50.00        N/A    $50.00
AR   CON     2    9      SW Data Cust Ln Svcs - High Speed Single Ln.  MRC       Yes       Yes         $50.00      $5.97    $44.04
AR   CON     2    9      SW Data Cust Ln Svcs - High Speed Single Ln.                                                     
                           INSTALL NRC                                 NRC       Yes       No          $12.00        N/A    $12.00
AR   CON     2    9      SW Data Cust Ln Svcs - High Speed CentraNet   MRC       Yes       Yes         $50.00      $5.97    $44.04
AR   CON     2    9      SW Data Cust Ln Svcs - High Speed CentraNet                                                      
                           INSTALL NRC                                 NRC       Yes       No          $15.00        N/A    $15.00
AR   CON     2    9      INTEROFFICE MILEAGE                                                                               
AR   CON     2    9           Central Office Termination               MRC       Yes       Yes        $150.00     $17.90   $132.11
AR   CON     2    9           Central Office Termination INSTALL NRC   NRC       Yes       No         $125.00        N/A   $125.00
AR   CON     2    9           Central Office Channelization            MRC       Yes       Yes          $5.00      $0.60     $4.40
             2    9         Optional Services                                                                              
AR   CON     2    9           Data Direct Connect                      MRC       Yes       Yes          $1.00      $0.12     $0.88
AR   CON     2    9           Data Closed User Group                   MRC       Yes       Yes          $1.00      $0.12     $0.88
AR   CON     2    9      INTEROFFICE MILEAGE                                                                               
AR   CON     2    9           Feature Package Data 1000                MRC       Yes       Yes          $3.00      $0.36     $2.64
AR   CON     2    9         Software Reconfiguration NRC               NRC       Yes       No          $12.75        N/A    $12.75
             2    9      Switched Data Network Usage                                                                       
AR   CON     2    9      LOCAL SET UP                                 USAGE      Yes       Yes          $0.02      $0.00     $0.02
AR   CON     2    9      LOCAL EACH MOU                               USAGE      Yes       Yes          $0.01      $0.00     $0.01
AR   CON     2    9      Band A 1-10 Airline Mi. Set up               USAGE      Yes       Yes          $0.03      $0.00     $0.03
AR   CON     2    9      Band B 11-16 Airline Mi. Set up              USAGE      Yes       Yes          $0.04      $0.00     $0.04
AR   CON     2    9      Band C 17-22 Airline Mi. Set up              USAGE      Yes       Yes          $0.05      $0.01     $0.04
AR   CON     2    9      Band D 23-30 Airline Mi. Set up              USAGE      Yes       Yes          $0.06      $0.01     $0.05
AR   CON     2    9      Band E 31-40 Airline Mi. Set up              USAGE      Yes       Yes          $0.07      $0.01     $0.06
AR   CON     2    9      Band A 1-10 Airline Mi. each min             USAGE      Yes       Yes          $0.03      $0.00     $0.03
AR   CON     2    9      Band B 11-16 Airline Mi. each min.           USAGE      Yes       Yes          $0.05      $0.01     $0.04
AR   CON     2    9      Band C 17-22 Airline Mi. each min.           USAGE      Yes       Yes          $0.08      $0.01     $0.07
AR   CON     2    9      Band D 23-30 Airline Mi. each min.           USAGE      Yes       Yes          $0.09      $0.01     $0.08
AR   CON     2    9      Band E 31-40 Airline Mi. each min.           USAGE      Yes       Yes          $0.11      $0.01     $0.10
             2                                                                                                             
             2           SWITCHED DATA NETWORK USAGE WITH 40 % DISCOUNT                                                    
AR    CON    2    9      Local call setup                             USAGE      Yes       Yes         $0.012     $0.001    $0.011
AR    CON    2    9      Each add. mou - local                        USAGE      Yes       Yes         $0.006     $0.001    $0.005
AR    CON    2    9      Band A 1-10 Airline Mi. Set up               USAGE      Yes       Yes         $0.018     $0.002    $0.016
AR    CON    2    9      Band B 11-16 Airline Mi. Set up              USAGE      Yes       Yes         $0.024     $0.003    $0.021
AR    CON    2    9      Band C 17-22 Airline Mi. Set up              USAGE      Yes       Yes         $0.030     $0.004    $0.026
AR    CON    2    9      Band D 23-30 Airline Mi. Set up              USAGE      Yes       Yes         $0.036     $0.004    $0.032
AR    CON    2    9      Band E 31-40 Airline Mi. Set up              USAGE      Yes       Yes         $0.042     $0.005    $0.037
AR    CON    2    9      Band A 1-10 Airline Mi. each min.            USAGE      Yes       Yes         $0.018     $0.002    $0.016
AR    CON    2    9      Band B 11-16 Airline Mi. each min.           USAGE      Yes       Yes         $0.030     $0.004    $0.026

</TABLE>

                                    Page 6
<PAGE>   120
                          GTE ARKANSAS (CONTEL) TARIFFS
                           RESALE PRODUCTS & SERVICES
                  GTE ARKANSAS (CONTEL) GENERAL EXCHANGE TARIFF

<TABLE>
<CAPTION>
                                                                    BILLING     RESALE    DISCOUNT    RETAIL    AVOIDED    RESALE
ST   CO   RULE  SEC              SERVICE DESCRIPTION                  TYPE     POSITION   POSITION     RATE      COST       RATE
<S> <C>    <C>  <C>    <C>                                           <C>         <C>        <C>       <C>        <C>       <C>
                                                                                                    
AR    CON    2    9      Band C 17-22 Airline Mi. each min.           USAGE      Yes       Yes         $0.048     $0.006    $0.042
AR    CON    2    9      Band D 23-30 Airline Mi. each min.           USAGE      Yes       Yes         $0.054     $0.006    $0.048
AR    CON    2    9      Band E 31-40 Airline Mi. each min.           USAGE      Yes       Yes         $0.066     $0.008    $0.058
             2                                                                                                              
AR    CON    2   10      RETURNED CHECKS     NRC                       NRC        No        No            N/A        N/A       N/A
             2                                                                                                              
             2                                                                                                              
             2    4      USAGE PRICING SERVICE (GRANDFATHERED)                                                              
             2                                                                                                              
AR    CON    2    4      Plan I -Inside base rate area - one                                                                
                           party RES                                   MRC        No        No          $7.50        N/A       N/A
AR    CON    2    4      Plan II -Inside base rate area - one                                                               
                           party RES                                   MRC        No        No          $5.00        N/A       N/A
             2                                                                                                              
AR    CON    2    4      Usage Charges - usage pricing (GRANDFATHERED)                                                      
AR    CON    2    4      Zone 1 - (home exchange, airline miles)                                                            
                           plan 1                                     USAGE      Yes       Yes          $0.04      $0.00     $0.04
AR    CON    2    4      Zone 2 - 0-10 airline miles plan I           USAGE      Yes       Yes          $0.04      $0.00     $0.04
AR    CON    2    4      Zone 3 - 11-20 airline miles plan 1          USAGE      Yes       Yes          $0.04      $0.00     $0.04
AR    CON    2    4      Zone 1 - (home exchange, airline miles)                                                            
                           plan 1                                     USAGE      Yes       Yes         $0.015      $0.00    $0.013
AR    CON    2    4      Zone 2 - 0-10 airline miles plan I           USAGE      Yes       Yes          $0.02      $0.00     $0.02
AR    CON    2    4      Zone 3 - 11-20 airline miles plan 1          USAGE      Yes       Yes         $0.025      $0.00    $0.022
AR    CON    2    4      Zone 1 - (home exchange, airline miles)                                                            
                           plan II                                    USAGE      Yes       Yes          $0.07      $0.01     $0.06
AR    CON    2    4      Zone 2 - 0-10 airline miles plan II          USAGE      Yes       Yes          $0.07      $0.01     $0.06
AR    CON    2    4      Zone 3 - 11-20 airline miles plan II         USAGE      Yes       Yes          $0.07      $0.01     $0.06
AR    CON    2    4      Zone 1 - (home exchange, airline miles)                                                            
                           plan II                                    USAGE      Yes       Yes          $0.03      $0.00     $0.03
AR    CON    2    4      Zone 2 - 0-10 airline miles plan II          USAGE      Yes       Yes          $0.04      $0.00     $0.04
AR    CON    2    4      Zone 3 - 11-20 airline miles plan II         USAGE      Yes       Yes          $0.05      $0.01     $0.04
AR    CON    2    4      Usage pricing - detail billing - monthly                                                           
                           per account                                 MRC        No        No                       N/A       N/A
AR    CON    2    4      Usage pricing - detail billing - monthly per                                                       
                           account  NRC                                NRC        No        No                       N/A       N/A
AR    CON    2    4      Usage Pricing - Detail billing - each call                                                         
                           printed                                     MRC        No        No                       N/A       N/A
             2                                                                                                              
             2    4      Usage Charges - NIGHT DISCOUNT) usage                                                              
                           pricing (GRANDFATHERED)                                                                          
AR    CON    2    4      Zone 1 - (home exchange. airline miles)                                                            
                           plan 1                                     USAGE      Yes       Yes         $0.020     $0.002    $0.018
AR    CON    2    4      Zone 2 - 0-10 airline miles plan I           USAGE      Yes       Yes         $0.020     $0.002    $0.018
AR    CON    2    4      Zone 3 - 11-20 airline miles plan 1          USAGE      Yes       Yes         $0.020     $0.002    $0.018
AR    CON    2    4      Zone 1 - (home exchange. airline miles)                                                            
                           plan 1                                     USAGE      Yes       Yes         $0.008     $0.001    $0.007
AR    CON    2    4      Zone 2 - 0-10 airline miles plan I           USAGE      Yes       Yes         $0.010     $0.001    $0.009
AR    CON    2    4      Zone 3 - 11-20 airline miles plan 1          USAGE      Yes       Yes         $0.013     $0.001    $0.011
AR    CON    2    4      Zone 1 - (home exchange. airline miles)                                                            
                           plan II                                    USAGE      Yes       Yes         $0.035     $0.004    $0.031
AR    CON    2    4      Zone 2 - 0-10 airline miles plan II          USAGE      Yes       Yes         $0.035     $0.004    $0.031
AR    CON    2    4      Zone 3 - 11-20 airline miles plan II         USAGE      Yes       Yes         $0.035     $0.004    $0.031
AR    CON    2    4      Zone 1 - (home exchange. airline miles)                                                            
                           plan II                                    USAGE      Yes       Yes         $0.015     $0.002    $0.013
AR    CON    2    4      Zone 2 - 0-10 airline miles plan II          USAGE      Yes       Yes         $0.020     $0.002    $0.018
AR    CON    2    4      Zone 3 - 11-20 airline miles plan II         USAGE      Yes       Yes         $0.025     $0.003    $0.022
             2                                                                                                              
             2                                                                                                    
             2    4      LOCAL MEASURED SERVICE (LMS) - GRANDFATHERED                                             
</TABLE>

                                    Page 7
<PAGE>   121
                          GTE ARKANSAS (CONTEL) TARIFFS
                           RESALE PRODUCTS & SERVICES
                  GTE ARKANSAS (CONTEL) GENERAL EXCHANGE TARIFF

<TABLE>
<CAPTION>
                                                                    BILLING     RESALE    DISCOUNT    RETAIL    AVOIDED    RESALE
ST   CO   RULE  SEC              SERVICE DESCRIPTION                  TYPE     POSITION   POSITION     RATE      COST       RATE
<S> <C>    <C>  <C>    <C>                                           <C>         <C>        <C>       <C>        <C>       <C>
                                                                                                                  
AR    CON    2    4      Usage  1st MOU                               USAGE      Yes       Yes         $0.050     $0.006    $0.044
AR    CON    2    4      Usage  Add'l MOU                             USAGE      Yes       Yes         $0.020     $0.002    $0.018
AR    CON    2    4      TOD Discount  1st mou                        USAGE      Yes       Yes         $0.025     $0.003    $0.022
AR    CON    2    4      TOD Discount  Add mou                        USAGE      Yes       Yes         $0.010     $0.001    $0.009
AR    CON    2    4      LMS-Opr Hnd.-Credit card Station             USAGE      Yes       Yes         $0.350     $0.042    $0.308
AR    CON    2    4      LMS-Opr Hnd.-Station to station              USAGE      Yes       Yes         $0.900     $0.107    $0.793
AR    CON    2    4      LMS-Opr Hnd.-Person to person                USAGE      Yes       Yes         $2.500     $0.298    $2.202
AR    CON    2    4      LMS-Opr Hnd.-Detail billing                  USAGE      Yes       Yes         $0.030     $0.004    $0.026
             2                                                                                                              
             2   49      OBSOLETE SERVICES (GRANDFATHERED)                                                                  
AR    CON    2   49      Special Billing Number Service - 1st Number   MRC        No        No          $1.00        N/A       N/A
AR    CON    2   49      Special Billing Number Service - Each                                                              
                           Add. No.                                    MRC        No        No          $0.50        N/A       N/A
AR    CON    2   49      Special Billing No. Separate bill -                                                                
                           each No.                                    MRC        No        No          $2.00        N/A       N/A
AR    CON    2   49      Automatic Callback Per line - BUS             MRC       YES       YES          $2.50      $0.30     $2.20
AR    CON    2   49      Automatic Callback Per line - RES             MRC       YES       YES          $2.50      $0.30     $2.20
AR    CON    2   49      Call Trace per line - BUS                     MRC       YES       YES          $1.50      $0.18     $1.32
AR    CON    2   49      Call Trace per line - RES                     MRC       YES       YES          $1.50      $0.18     $1.32
AR    CON    2   49      Call Trace per successful attempt - BUS       NRC       YES       YES          $7.00      $0.84     $6.16
AR    CON    2   49      Call Trace per successful attempt -RES        NRC       YES       YES          $7.00      $0.84     $6.16
AR    CON    2   49      Ring Again per line - BUS                     MRC       YES       YES          $2.50      $0.30     $2.20
AR    CON    2   49      Ring Again per line - RES                     MRC       YES       YES          $2.50      $0.30     $2.20
             2                                                                                                              
             2                                                                                                    
</TABLE>

                                    Page 8
<PAGE>   122
                          GTE ARKANSAS (CONTEL) TARIFFS
                           RESALE PRODUCTS & SERVICES
                  GTE ARKANSAS (CONTEL) GENERAL EXCHANGE TARIFF

<TABLE>
<CAPTION>
                                                                    BILLING     RESALE    DISCOUNT    RETAIL    AVOIDED    RESALE
ST   CO   RULE  SEC              SERVICE DESCRIPTION                  TYPE     POSITION   POSITION     RATE      COST       RATE
<S> <C>    <C>  <C>    <C>                                           <C>         <C>        <C>       <C>        <C>       <C>
                                                                       
SWB     PR   2                                                                   
             2                                                                   
             2           IntraLATA Interexchange Private Lines                   
             2    2      Series 100                                              
             2              Type 102                                   
AR    CON    2                Local Channel, ea                        NRC       Yes        No         $225.00       N/A    $225.00
AR    CON    2                Local Channel, ea                        MRC       Yes        No          $22.00       N/A     $22.00
AR    CON    2                Interoffice Channel, ea mi               MRC       Yes        No           $4.00       N/A      $4.00
AR    CON    2                Interoffice Channel Terminal,                                                                 
                                per channel                            MRC       Yes        No          $14.25       N/A     $14.25
             2    2           IX Channel                                                                                    
AR    CON    2                  0 to 250 mi ea mi                      MRC       Yes        No           $5.75       N/A      $5.75
AR    CON    2                  Ea additional mi over 250              MRC       Yes        No           $3.90       N/A      $3.90
AR    CON    2                IX Channel Terminal ea, 2 required                                                            
                                per IX channel                         MRC       Yes        No          $10.75       N/A     $10.75
             2    2      Series 200                                                                                         
             2              Type 250                                                                                        
             2                Interoffice Channel                                                                           
AR    CON    2                  Half-duplex                            MRC       Yes        No           $5.00       N/A      $5.00
AR    CON    2                  Duplex                                 MRC       Yes        No           $8.00       N/A      $8.00
             2    2           Interoffice Channel Terminal, per                                                             
                                terminal                                                                                    
AR    CON    2                  Half-duplex                            MRC       Yes        No           $2.60       N/A      $2.60
AR    CON    2                  Duplex                                 MRC       Yes        No           $2.60       N/A      $2.60
             2                IX Channel, ea mi                                                                             
             2                  Half-duplex                                                                                 
AR    CON    2                    0 to 250 mi, ea mi                   MRC       Yes        No           $4.70       N/A      $4.70
AR    CON    2                    Ea additional mi over 250            MRC       Yes        No           $4.70       N/A      $4.70
             2                  Duplex                                                                                      
AR    CON    2                    0 to 250 mi, ea mi                   MRC       Yes        No           $4.70       N/A      $4.70
             2                    Ea additional mi over 250                                                                
             2                IX Channel Terminal                                                                           
AR    CON    2                  Half-duplex                            MRC       Yes        No          $53.00       N/A     $53.00
AR    CON    2                  Duplex                                 MRC       Yes        No          $55.00       N/A     $55.00
             2    2         Type 251                                                                                        
             2                Interoffice Channel                                                                           
AR    CON    2                  Half-duplex                            MRC       Yes        No           $5.00       N/A      $5.00
AR    CON    2                  Duplex                                 MRC       Yes        No           $8.00       N/A      $8.00
             2    2           Interoffice Channel Terminal                                                                  
AR    CON    2                  Half-duplex                            MRC       Yes        No           $2.60       N/A      $2.60
AR    CON    2                  Duplex                                 MRC       Yes        No           $2.60       N/A      $2.60
             2                IX Channel, ea                                                                                
             2                  Half-duplex                                                                                 
AR    CON    2                    0 to 250 mi, ea mi                   MRC       Yes        No           $2.90       N/A      $2.90
AR    CON    2                    Ea additional mi over 250            MRC       Yes        No           $2.90       N/A      $2.90
             2                  Duplex                                                                                      
AR    CON    2                    0 to 250 mi, ea mi                   MRC       Yes        No           $2.90       N/A      $2.90
             2                    Ea additioanl mi over 250                                              $2.90              
</TABLE>

                                    Page 9
<PAGE>   123
                          GTE ARKANSAS (CONTEL) TARIFFS
                           RESALE PRODUCTS & SERVICES
                  GTE ARKANSAS (CONTEL) GENERAL EXCHANGE TARIFF

<TABLE>
<CAPTION>
                                                                    BILLING     RESALE    DISCOUNT    RETAIL    AVOIDED    RESALE
ST   CO   RULE  SEC              SERVICE DESCRIPTION                  TYPE     POSITION   POSITION     RATE      COST       RATE
<S> <C>    <C>  <C>    <C>                                           <C>         <C>        <C>       <C>        <C>       <C>
                                                                                           
             2                IX Channel Terminal
AR    CON    2                  Half-duplex                            MRC       Yes        No          $47.00     N/A       $47.00
AR    CON    2                  Duplex                                 MRC       Yes        No          $47.00     N/A       $47.00
             2    2      Series 400                                                                                         
             2              Local Channel, ea                                                                               
AR    CON    2                Type 414B                                MRC       Yes        No          $66.00     N/A       $66.00
AR    CON    2                Type 414B                                NRC       Yes        No         $590.00     N/A      $590.00
AR    CON    2                Type 414C                                NRC       Yes        No         $445.00     N/A      $445.00
AR    CON    2                Type 415                                 MRC       Yes        No          $21.00     N/A       $21.00
AR    CON    2                Type 415                                 NRC       Yes        No         $155.00     N/A      $155.00
AR    CON    2                Type 417A                                MRC       Yes        No          $35.50     N/A       $35.50
AR    CON    2                Type 417A                                NRC       Yes        No         $360.00     N/A      $360.00
AR    CON    2                Type 417B                                MRC       Yes        No          $35.50     N/A       $35.50
AR    CON    2                Type 417B                                NRC       Yes        No         $410.00     N/A      $410.00
AR    CON    2                Type 420                                 MRC       Yes        No          $52.00     N/A       $52.00
AR    CON    2                Type 420                                 NRC       Yes        No         $290.00     N/A      $290.00
AR    CON    2                Type 422                                 MRC       Yes        No          $51.00     N/A       $51.00
AR    CON    2                Type 422                                 NRC       Yes        No         $295.00     N/A      $295.00
AR    CON    2                Type 423                                 MRC       Yes        No          $21.00     N/A       $21.00
AR    CON    2                Type 423                                 NRC       Yes        No         $270.00     N/A      $270.00
AR    CON    2                Type 424                                 MRC       Yes        No          $53.00     N/A       $53.00
AR    CON    2                Type 424                                 NRC       Yes        No         $340.00     N/A      $340.00
AR    CON    2                Type 425                                 MRC       Yes        No          $38.00     N/A       $38.00
AR    CON    2                Type 425                                 NRC       Yes        No         $280.00     N/A      $280.00
AR    CON    2                Type 428                                 MRC       Yes        No          $23.50     N/A       $23.50
AR    CON    2                Type 428                                 NRC       Yes        No         $260.00     N/A      $260.00
AR    CON    2                Type 432                                 MRC       Yes        No          $47.00     N/A       $47.00
AR    CON    2                Type 432                                 NRC       Yes        No         $470.00     N/A      $470.00
AR    CON    2                Type 435                                 MRC       Yes        No          $54.00     N/A       $54.00
AR    CON    2                Type 435                                 NRC       Yes        No         $260.00     N/A      $260.00
AR    CON    2                Type 442                                 MRC       Yes        No          $21.75     N/A       $21.75
AR    CON    2                Type 442                                 NRC       Yes        No         $265.00     N/A      $265.00
AR    CON    2                Type 443                                 MRC       Yes        No          $57.00     N/A       $57.00
AR    CON    2                Type 443                                 NRC       Yes        No         $275.00     N/A      $275.00
AR    CON    2    2         Interoffice Channel ea mi                  MRC       Yes        No           $7.75     N/A        $7.75
AR    CON    2              Interoffice Channel Terminal, per terminal MRC       Yes        No           $3.20     N/A        $3.20
             2              IX Channel, per mile                                                                            
AR    CON    2                0 to 250 mi, ea mi                       MRC       Yes        No           $4.70     N/A        $4.70
AR    CON    2                Ea additional mi over 250                MRC       Yes        No           $3.20     N/A        $3.20
             2    2         IX Channel Terminal, per Terminal, 2                                                            
                              required per ch.                                                                              
AR    CON    2                  Type 414B                              MRC       Yes        No          $33.00     N/A       $33.00
AR    CON    2                  Type 414C                              MRC       Yes        No          $33.00     N/A       $33.00
AR    CON    2                  Type 417A                              MRC       Yes        No          $33.00     N/A       $33.00
AR    CON    2                  Type 417B                              MRC       Yes        No          $33.00     N/A       $33.00
AR    CON    2                  Type 420                               MRC       Yes        No          $33.00     N/A       $33.00
</TABLE>

                                   Page 10
<PAGE>   124
                          GTE ARKANSAS (CONTEL) TARIFFS
                           RESALE PRODUCTS & SERVICES
                  GTE ARKANSAS (CONTEL) GENERAL EXCHANGE TARIFF

<TABLE>
<CAPTION>
                                                                    BILLING     RESALE    DISCOUNT    RETAIL    AVOIDED    RESALE
ST   CO   RULE  SEC              SERVICE DESCRIPTION                  TYPE     POSITION   POSITION     RATE      COST       RATE
<S> <C>    <C>  <C>    <C>                                           <C>         <C>        <C>       <C>        <C>       <C>
AR    CON    2                Type 422                                MRC        Yes        No          $33.00     N/A       $33.00
AR    CON    2                Type 423                                MRC        Yes        No          $33.00     N/A       $33.00
AR    CON    2                Type 424                                MRC        Yes        No          $33.00     N/A       $33.00
AR    CON    2                Type 425                                MRC        Yes        No          $33.00     N/A       $33.00
AR    CON    2                Type 428                                MRC        Yes        No          $33.00     N/A       $33.00
AR    CON    2                Type 432                                MRC        Yes        No          $33.00     N/A       $33.00
AR    CON    2                Type 435                                MRC        Yes        No          $33.00     N/A       $33.00
AR    CON    2                Type 442                                MRC        Yes        No          $33.00     N/A       $33.00
AR    CON    2                Type 443                                MRC        Yes        No          $33.00     N/A       $33.00
AR    CON    2    2       Bridging Charge, (Multi-point Serv.)                                                               
                            per channel bridged                       MRC        Yes        No           $9.50     N/A        $9.50
             2    2    Signaling Arrangements                                                                                
             2            IX IntraLATA                                                                                       
AR    CON    2              Manual (J1B)                              MRC        Yes        No          $20.75     N/A       $20.75
AR    CON    2              Manual (J1B)                              NRC        Yes        No          $75.00     N/A       $75.00
AR    CON    2              Automatic (J1A)                           MRC        Yes        No          $15.00     N/A       $15.00
AR    CON    2              Automatic (J1A)                           NRC        Yes        No          $75.00     N/A       $75.00
             2    2         E & M Type Signaling                                                                             
AR    CON    2                Type 420                                MRC        Yes        No          $12.25     N/A       $12.25
AR    CON    2                Type 420                                NRC        Yes        No          $75.00     N/A       $75.00
AR    CON    2                Type 422                                MRC        Yes        No          $12.25     N/A       $12.25
AR    CON    2                Type 422                                NRC        Yes        No          $75.00     N/A       $75.00
AR    CON    2                Type 423                                MRC        Yes        No          $23.00     N/A       $23.00
AR    CON    2                Type 423                                NRC        Yes        No          $75.00     N/A       $75.00
AR    CON    2                Type 424                                MRC        Yes        No          $12.50     N/A       $12.50
AR    CON    2                Type 424                                NRC        Yes        No          $75.00     N/A       $75.00
AR    CON    2                Type 425                                MRC        Yes        No          $27.50     N/A       $27.50
AR    CON    2                Type 425                                NRC        Yes        No          $75.00     N/A       $75.00
AR    CON    2                Type 428                                MRC        Yes        No          $14.25     N/A       $14.25
AR    CON    2                Type 428                                NRC        Yes        No          $75.00     N/A       $75.00
AR    CON    2                Type 435                                MRC        Yes        No          $14.25     N/A       $14.25
AR    CON    2                Type 435                                NRC        Yes        No          $75.00     N/A       $75.00
             2              Loop Signaling, capable of 900 ohms                                                              
                              or more                                                                                        
AR    CON    2                Type 420                                MRC        Yes        No          $12.25     N/A       $12.25
AR    CON    2                Type 420                                NRC        Yes        No          $75.00     N/A       $75.00
AR    CON    2                Type 422                                MRC        Yes        No           $8.25     N/A        $8.25
AR    CON    2                Type 422                                NRC        Yes        No          $75.00     N/A       $75.00
AR    CON    2                Type 423                                MRC        Yes        No           $8.75     N/A        $8.75
AR    CON    2                Type 423                                NRC        Yes        No          $75.00     N/A       $75.00
AR    CON    2                Type 435                                MRC        Yes        No           $7.50     N/A        $7.50
AR    CON    2                Type 435                                NRC        Yes        No          $75.00     N/A       $75.00
             2              Loop Signaling, capable off less than                                                            
                              900 ohms                                                                                       
AR    CON    2                Type 420                                MRC        Yes        No          $18.50     N/A       $18.50
AR    CON    2                Type 420                                NRC        Yes        No          $75.00     N/A       $75.00
AR    CON    2                Type 422                                MRC        Yes        No          $15.25     N/A       $15.25
AR    CON    2                Type 422                                NRC        Yes        No          $75.00     N/A       $75.00
</TABLE>

                                   Page 11
<PAGE>   125
                          GTE ARKANSAS (CONTEL) TARIFFS
                           RESALE PRODUCTS & SERVICES
                  GTE ARKANSAS (CONTEL) GENERAL EXCHANGE TARIFF

<TABLE>
<CAPTION>
                                                                    BILLING     RESALE    DISCOUNT    RETAIL    AVOIDED    RESALE
ST   CO   RULE  SEC              SERVICE DESCRIPTION                  TYPE     POSITION   POSITION     RATE      COST       RATE
<S> <C>    <C>  <C>    <C>                                           <C>         <C>        <C>       <C>        <C>       <C>
                                                                                                                             
AR    CON    2           Type 423                                     MRC        Yes        No          $10.50     N/A       $10.50
AR    CON    2           Type 423                                     NRC        Yes        No          $75.00     N/A       $75.00
AR    CON    2           Type 435                                     MRC        Yes        No          $12.00     N/A       $12.00
AR    CON    2           Type 435                                     NRC        Yes        No          $75.00     N/A       $75.00
AR    CON    2         Type A, resistance in the range of                                                                          
                         0-199 ohms                                   MRC        Yes        No           $6.25     N/A        $6.25
AR    CON    2         Type A, resistance in the range of                                                                          
                         0-199 ohms                                   NRC        Yes        No          $75.00     N/A       $75.00
AR    CON    2         Type B, resistance in the range of 200                                                                      
                         to 899 ohms                                  MRC        Yes        No           $3.80     N/A        $3.80
AR    CON    2         Type B, resistance in the range of 200                                                      
                         to 899 ohms                                  NRC        Yes        No          $75.00     N/A       $75.00
AR    CON    2         Type C, resistance of 900 ohms or more         MRC        Yes        No           $1.50     N/A        $1.50
AR    CON    2         Type C, resistance of 900 ohms or more         NRC        Yes        No          $75.00     N/A       $75.00
             2                                                                                                     
</TABLE>

                                   Page 12
<PAGE>   126
                          GTE ARKANSAS (CONTEL) TARIFFS
                           RESALE PRODUCTS & SERVICES
                  GTE ARKANSAS (CONTEL) GENERAL EXCHANGE TARIFF

<TABLE>
<CAPTION>
                                                                    BILLING     RESALE    DISCOUNT    RETAIL    AVOIDED    RESALE
ST   CO   RULE  SEC              SERVICE DESCRIPTION                  TYPE     POSITION   POSITION     RATE      COST       RATE
<S> <C>    <C>  <C>    <C>                                           <C>         <C>        <C>       <C>        <C>       <C>
                                                                                                                   
             2                                                                     
             2                                                                     
             2                                                                     
SW    BEL    2                                                                     
             2                                                                     
ST    CO     2   Tariff  GTE Long Distance Telecommunications 
                           Services:              
             2              IntraLATA Two Point Service:                             
             2           Day Rate:                                                   
             2                Initial Minute:                                        
AR    CON    2   D.MTS          1 to 8 Miles                         USAGE       Yes       Yes            $0.10    $0.01      $0.09
AR    CON    2   D.MTS          9 to 12 Miles                        USAGE       Yes       Yes            $0.12    $0.01      $0.11
AR    CON    2   D.MTS          13 to 16 Miles                       USAGE       Yes       Yes            $0.15    $0.02      $0.13
AR    CON    2   D.MTS          17 to 21 Miles                       USAGE       Yes       Yes            $0.18    $0.02      $0.16
AR    CON    2   D.MTS          22 to 26 Miles                       USAGE       Yes       Yes            $0.23    $0.03      $0.20
AR    CON    2   D.MTS          27 to 31 Miles                       USAGE       Yes       Yes            $0.23    $0.03      $0.20
AR    CON    2   D.MTS          32 to 41 Miles                       USAGE       Yes       Yes            $0.23    $0.03      $0.20
AR    CON    2   D.MTS          42 to 56 Miles                       USAGE       Yes       Yes            $0.23    $0.03      $0.20
AR    CON    2   D.MTS          57 to 71 Miles                       USAGE       Yes       Yes            $0.23    $0.03      $0.20
AR    CON    2   D.MTS          72 to 87 Miles                       USAGE       Yes       Yes            $0.23    $0.03      $0.20
AR    CON    2   D.MTS          88 to 127 Miles                      USAGE       Yes       Yes            $0.23    $0.03      $0.20
AR    CON    2   D.MTS          Over 128 Miles                       USAGE       Yes       Yes            $0.23    $0.03      $0.20
             2                Each Additional Minute:                                                                        
AR    CON    2   D.MTS          1 to 8 Miles                         USAGE       Yes       Yes            $0.08    $0.01      $0.07
AR    CON    2   D.MTS          9 to 12 Miles                        USAGE       Yes       Yes            $0.10    $0.01      $0.09
AR    CON    2   D.MTS          13 to 16 Miles                       USAGE       Yes       Yes            $0.12    $0.01      $0.11
AR    CON    2   D.MTS          17 to 21 Miles                       USAGE       Yes       Yes            $0.15    $0.02      $0.13
AR    CON    2   D.MTS          22 to 26 Miles                       USAGE       Yes       Yes            $0.18    $0.02      $0.16
AR    CON    2   D.MTS          27 to 31 Miles                       USAGE       Yes       Yes            $0.20    $0.02      $0.18
AR    CON    2   D.MTS          32 to 41 Miles                       USAGE       Yes       Yes            $0.22    $0.03      $0.19
AR    CON    2   D.MTS          42 to 56 Miles                       USAGE       Yes       Yes            $0.23    $0.03      $0.20
AR    CON    2   D.MTS          57 to 71 Miles                       USAGE       Yes       Yes            $0.23    $0.03      $0.20
AR    CON    2   D.MTS          72 to 87 Miles                       USAGE       Yes       Yes            $0.23    $0.03      $0.20
AR    CON    2   D.MTS          88 to 127 Miles                      USAGE       Yes       Yes            $0.23    $0.03      $0.20
AR    CON    2   D.MTS          Over 128 Miles                       USAGE       Yes       Yes            $0.23    $0.03      $0.20
             2           Evening Rate:                                                                                       
             2                Initial Minute:                                                                                
AR    CON    2   D.MTS          1 to 8 Miles                         USAGE       Yes       Yes          $0.0831  $0.0099    $0.0732
AR    CON    2   D.MTS          9 to 12 Miles                        USAGE       Yes       Yes          $0.0997  $0.0119    $0.0878
AR    CON    2   D.MTS          13 to 16 Miles                       USAGE       Yes       Yes          $0.1246  $0.0149    $0.1097
AR    CON    2   D.MTS          17 to 21 Miles                       USAGE       Yes       Yes          $0.1496  $0.0178    $0.1318
AR    CON    2   D.MTS          22 to 26 Miles                       USAGE       Yes       Yes          $0.1911  $0.0228    $0.1683
AR    CON    2   D.MTS          27 to 31 Miles                       USAGE       Yes       Yes          $0.1911  $0.0228    $0.1683
AR    CON    2   D.MTS          32 to 41 Miles                       USAGE       Yes       Yes          $0.1911  $0.0228    $0.1683
AR    CON    2   D.MTS          42 to 56 Miles                       USAGE       Yes       Yes          $0.1911  $0.0228    $0.1683
AR    CON    2   D.MTS          57 to 71 Miles                       USAGE       Yes       Yes          $0.1911  $0.0228    $0.1683
</TABLE>

                                   Page 13
<PAGE>   127
                          GTE ARKANSAS (CONTEL) TARIFFS
                           RESALE PRODUCTS & SERVICES
                  GTE ARKANSAS (CONTEL) GENERAL EXCHANGE TARIFF

<TABLE>
<CAPTION>
                                                                    BILLING     RESALE    DISCOUNT    RETAIL    AVOIDED    RESALE
ST   CO   RULE  SEC              SERVICE DESCRIPTION                  TYPE     POSITION   POSITION     RATE      COST       RATE
<S> <C>    <C>  <C>     <C>                                          <C>         <C>        <C>       <C>        <C>       <C>
AR    CON    2   D.MTS          72 to 87 Miles                       USAGE       Yes       Yes          $0.1911  $0.0228   $0.1683
AR    CON    2   D.MTS          88 to 127 Miles                      USAGE       Yes       Yes          $0.1911  $0.0228   $0.1683
AR    CON    2   D.MTS          Over 128 Miles                       USAGE       Yes       Yes          $0.1911  $0.0228   $0.1683
             2                Each Additional Minute:                                                                      
AR    CON    2   D.MTS          1 to 8 Miles                         USAGE       Yes       Yes          $0.0665  $0.0079   $0.0586
AR    CON    2   D.MTS          9 to 12 Miles                        USAGE       Yes       Yes          $0.0831  $0.0099   $0.0732
AR    CON    2   D.MTS          13 to 16 Miles                       USAGE       Yes       Yes          $0.0997  $0.0119   $0.0878
AR    CON    2   D.MTS          17 to 21 Miles                       USAGE       Yes       Yes          $0.1246  $0.0149   $0.1097
AR    CON    2   D.MTS          22 to 26 Miles                       USAGE       Yes       Yes          $0.1496  $0.0178   $0.1318
AR    CON    2   D.MTS          27 to 31 Miles                       USAGE       Yes       Yes          $0.1662  $0.0198   $0.1464
AR    CON    2   D.MTS          32 to 41 Miles                       USAGE       Yes       Yes          $0.1828  $0.0218   $0.1610
AR    CON    2   D.MTS          42 to 56 Miles                       USAGE       Yes       Yes          $0.1911  $0.0228   $0.1683
AR    CON    2   D.MTS          57 to 71 Miles                       USAGE       Yes       Yes          $0.1911  $0.0228   $0.1683
AR    CON    2   D.MTS          72 to 87 Miles                       USAGE       Yes       Yes          $0.1911  $0.0228   $0.1683
AR    CON    2   D.MTS          88 to 127 Miles                      USAGE       Yes       Yes          $0.1911  $0.0228   $0.1683
AR    CON    2   D.MTS          Over 128 Miles                       USAGE       Yes       Yes          $0.1911  $0.0228   $0.1683
             2           Night/Weekend Rate:                                                                               
             2                Initial Minute:                                                                              
AR    CON    2   D.MTS          1 to 8 Miles                         USAGE       Yes       Yes          $0.0550  $0.0066   $0.0484
AR    CON    2   D.MTS          9 to 12 Miles                        USAGE       Yes       Yes          $0.0660  $0.0079   $0.0581
AR    CON    2   D.MTS          13 to 16 Miles                       USAGE       Yes       Yes          $0.0825  $0.0098   $0.0727
AR    CON    2   D.MTS          17 to 21 Miles                       USAGE       Yes       Yes          $0.0990  $0.0118   $0.0872
AR    CON    2   D.MTS          22 to 26 Miles                       USAGE       Yes       Yes          $0.1265  $0.0151   $0.1114
AR    CON    2   D.MTS          27 to 31 Miles                       USAGE       Yes       Yes          $0.1265  $0.0151   $0.1114
AR    CON    2   D.MTS          32 to 41 Miles                       USAGE       Yes       Yes          $0.1265  $0.0151   $0.1114
AR    CON    2   D.MTS          42 to 56 Miles                       USAGE       Yes       Yes          $0.1265  $0.0151   $0.1114
AR    CON    2   D.MTS          57 to 71 Miles                       USAGE       Yes       Yes          $0.1265  $0.0151   $0.1114
AR    CON    2   D.MTS          72 to 87 Miles                       USAGE       Yes       Yes          $0.1265  $0.0151   $0.1114
AR    CON    2   D.MTS          88 to 127 Miles                      USAGE       Yes       Yes          $0.1265  $0.0151   $0.1114
AR    CON    2   D.MTS          Over 128 Miles                       USAGE       Yes       Yes          $0.1265  $0.0151   $0.1114
             2                Each Additional Minute:                                                                      
AR    CON    2   D.MTS          1 to 8 Miles                         USAGE       Yes       Yes          $0.0440  $0.0052   $0.0388
AR    CON    2   D.MTS          9 to 12 Miles                        USAGE       Yes       Yes          $0.0550  $0.0066   $0.0484
AR    CON    2   D.MTS          13 to 16 Miles                       USAGE       Yes       Yes          $0.0660  $0.0079   $0.0581
AR    CON    2   D.MTS          17 to 21 Miles                       USAGE       Yes       Yes          $0.0825  $0.0098   $0.0727
AR    CON    2   D.MTS          22 to 26 Miles                       USAGE       Yes       Yes          $0.0990  $0.0118   $0.0872
AR    CON    2   D.MTS          27 to 31 Miles                       USAGE       Yes       Yes          $0.1100  $0.0131   $0.0969
AR    CON    2   D.MTS          32 to 41 Miles                       USAGE       Yes       Yes          $0.1210  $0.0144   $0.1066
AR    CON    2   D.MTS          42 to 56 Miles                       USAGE       Yes       Yes          $0.1265  $0.0151   $0.1114
AR    CON    2   D.MTS          57 to 71 Miles                       USAGE       Yes       Yes          $0.1265  $0.0151   $0.1114
AR    CON    2   D.MTS          72 to 87 Miles                       USAGE       Yes       Yes          $0.1265  $0.0151   $0.1114
AR    CON    2   D.MTS          88 to 127 Miles                      USAGE       Yes       Yes          $0.1265  $0.0151   $0.1114
AR    CON    2   D.MTS          Over 128 Miles                       USAGE       Yes       Yes          $0.1265  $0.0151   $0.1114
             2                                                                                                             
AR    CON    2   D.MTS   Service Charge - Dial Calling Card -                                                              
                           Station to Station                        USAGE       Yes        No            $0.35      N/A     $0.35
</TABLE>

                                   Page 14
<PAGE>   128
                          GTE ARKANSAS (CONTEL) TARIFFS
                           RESALE PRODUCTS & SERVICES
                  GTE ARKANSAS (CONTEL) GENERAL EXCHANGE TARIFF

<TABLE>
<CAPTION>
                                                                    BILLING     RESALE    DISCOUNT    RETAIL    AVOIDED    RESALE
ST   CO   RULE  SEC              SERVICE DESCRIPTION                  TYPE     POSITION   POSITION     RATE      COST       RATE
<S> <C>    <C>  <C>     <C>                                          <C>         <C>        <C>       <C>        <C>       <C>
AR    CON    2   D.MTS   Service Charge - Operator - 
                           Station to Station                        USAGE       Yes        No           $0.90      N/A      $0.90
AR    CON    2   D.MTS   Service Charge - Person to Person           USAGE       Yes        No           $2.50      N/A      $2.50
             2                                                                                                             
AR    CON    2   D.MTS   Enterprise Service                           MRC        Yes        No           $4.40      N/A      $4.40
             2                                                                                                             
AR    CON    2   D.MTS   Selective Class of Call Screening            MRC        Yes       Yes          $53.00    $6.32     $46.68
AR    CON    2   D.MTS   Selective Class of Call Screening            NRC        Yes        No         $340.00      N/A    $340.00
             2                                                                                                             
AR    CON    2   D.MTS   PrePaid Calling Card Service (per minute)   USAGE       Yes       Yes           $0.40    $0.05      $0.35
             2                                                                                                             
             2              Conference Service:                                                                            
AR    CON    2   D.MTS   Conference Call Set-Up Charge               USAGE       Yes        No           $1.50      N/A      $1.50
             2           Conference Call Per Minute of Use Charge:                                                         
AR    CON    2   D.MTS        0 - 26 Miles                           USAGE       Yes        No           $0.05      N/A      $0.05
AR    CON    2   D.MTS        27 - 71 Miles                          USAGE       Yes        No           $0.10      N/A      $0.10
AR    CON    2   D.MTS        Over 71 Miles                          USAGE       Yes        No           $0.15      N/A      $0.15
             2                                                                                                             
             2                                                                                                             
             2              IntraLATA Optional Toll Calling Plans:                                                         
             2           Extended Community Saver:                                                                         
             2                Residence:                                                                                   
             2                  Block-of-Time:                                                                             
AR    CON    2    OCP             Monthly Rate for First Hour         MRC        Yes       Yes           $2.70    $0.32      $2.38
AR    CON    2    OCP             Additional Per Minute              USAGE       Yes       Yes          $0.045   $0.005     $0.040
             2                Business:                                                                                    
             2                  Block-of-Time:                                                                             
AR    CON    2    OCP             Monthly Rate for First Hour         MRC        Yes       Yes           $2.70    $0.32      $2.38
AR    CON    2    OCP             Additional Per Minute              USAGE       Yes       Yes          $0.045   $0.005     $0.040
             2                Residence:                                                                                   
AR    CON    2    OCP           Unlimited Usage                       MRC         No        No          $16.20      N/A        N/A
             2                Business:                                                                                    
AR    CON    2    OCP           Unlimited Usage                       MRC        Yes       Yes          $18.00    $2.15     $15.85
             2                                                                                                             
             2           Circle Saver:                                                                                     
             2                Residence Block-of-Time:                                                                     
             2                  41 Mile Radius:                                                                            
AR    CON    2    OCP             Monthly Rate for First Hour         MRC        Yes       Yes           $6.00    $0.72      $5.28
AR    CON    2    OCP             Additional Per Minute              USAGE       Yes       Yes           $0.10    $0.01      $0.09
             2                Business Block-of-Time:                                                                      
             2                  41 Mile Radius:                                                                            
AR    CON    2    OCP             Monthly Rate for First Hour         MRC        Yes       Yes           $6.00    $0.72      $5.28
AR    CON    2    OCP             Additional Per Minute              USAGE       Yes       Yes           $0.10    $0.01      $0.09
             2                                                                                                             
             2           Circle Saver Trial Plan - Fort Smith LATA:                                                        
             2                Residence:                                                                                   
</TABLE>

                                   Page 15
<PAGE>   129
                          GTE ARKANSAS (CONTEL) TARIFFS
                           RESALE PRODUCTS & SERVICES
                  GTE ARKANSAS (CONTEL) GENERAL EXCHANGE TARIFF

<TABLE>
<CAPTION>
                                                                    BILLING     RESALE    DISCOUNT    RETAIL    AVOIDED    RESALE
ST   CO   RULE  SEC              SERVICE DESCRIPTION                  TYPE     POSITION   POSITION     RATE      COST       RATE
<S> <C>    <C>  <C>     <C>                                          <C>         <C>        <C>       <C>        <C>       <C>
AR    CON    2    OCP           Unlimited Usage (one-way 
                                  originating calling)                MRC         No        No        $19.95         N/A       N/A
             2                Business:                                                                                    
AR    CON    2    OCP           Unlimited Usage (one-way                                                                   
                                  originating calling)                MRC        Yes       Yes        $34.95       $4.17    $30.78
             2                                                                                                             
             2           1+ Saver:                                                                                         
             2                Residence:                                                                                   
             2                  Block-of-Time:                                                                             
AR    CON    2    OCP             Monthly Rate for First Hour         MRC        Yes       Yes         $7.80       $0.93     $6.87
AR    CON    2    OCP             Additional Per Minute              USAGE       Yes       Yes         $0.13       $0.02     $0.11
             2                  Block-of-Time:                                                                             
AR    CON    2    OCP             Monthly Rate for First 5 Hours      MRC        Yes       Yes        $36.00       $4.29    $31.71
AR    CON    2    OCP             Additional Per Minute              USAGE       Yes       Yes         $0.12       $0.01     $0.11
             2                  Block-of-Time:                                                                             
AR    CON    2    OCP             Monthly Rate for First 10 Hours     MRC        Yes       Yes        $60.00       $7.16    $52.84
AR    CON    2    OCP             Additional Per Minute              USAGE       Yes       Yes         $0.10       $0.01     $0.09
             2                Business:                                                                                    
             2                  Block-of-Time:                                                                             
AR    CON    2    OCP             Monthly Rate for First Hour         MRC        Yes       Yes         $7.80       $0.93     $6.87
AR    CON    2    OCP             Additional Per Minute              USAGE       Yes       Yes         $0.13       $0.02     $0.11
             2                  Block-of-Time:                                                                             
AR    CON    2    OCP             Monthly Rate for First 5 Hours      MRC        Yes       Yes        $36.00       $4.29    $31.71
AR    CON    2    OCP             Additional Per Minute              USAGE       Yes       Yes         $0.12       $0.01     $0.11
             2                  Block-of-Time:                                                                             
AR    CON    2    OCP             Monthly Rate for First 10 Hours     MRC        Yes       Yes        $60.00       $7.16    $52.84
AR    CON    2    OCP             Additional Per Minute              USAGE       Yes       Yes         $0.10       $0.01     $0.09
             2                                                                                                             
             2                Residence:                                                                                   
             2                  Discount Plan:                                                                             
AR    CON    2    OCP             10 % Discount                       MRC        Yes       Yes        Varies      Varies    Varies
AR    CON    2    OCP             15 % Discount                       MRC        Yes       Yes        Varies      Varies    Varies
AR    CON    2    OCP             20 % Discount                       MRC        Yes       Yes        Varies      Varies    Varies
             2                Business:                                                                                    
             2                  Discount Plan:                                                                             
AR    CON    2    OCP             10 % Discount                       MRC        Yes       Yes        Varies      Varies    Varies
AR    CON    2    OCP             15 % Discount                       MRC        Yes       Yes        Varies      Varies    Varies
AR    CON    2    OCP             20 % Discount                       MRC        Yes       Yes        Varies      Varies    Varies
             2                                                                                                             
             2           Designated Number Plan:                                                                           
             2                Residence:                                                                                   
AR    CON    2    OCP           Unlimited Usage to First Designated                                                        
                                  Number                              MRC        Yes       Yes        $15.00       $1.79    $13.21
AR    CON    2    OCP           Unlimited Usage to Each Additional                                                         
                                  Designated Number                   MRC        Yes       Yes        $10.00       $1.19     $8.81
             2                Business:                                                                                    
AR    CON    2    OCP           Unlimited Usage to First Designated                                                        
                                  Number                              MRC        Yes       Yes        $15.00       $1.79    $13.21
AR    CON    2    OCP           Unlimited Usage to Each Additional                                                         
                                  Designated Number                   MRC        Yes       Yes        $10.00       $1.19     $8.81
             2                                                                                                             
</TABLE>

                                   Page 16
<PAGE>   130
                          GTE ARKANSAS (CONTEL) TARIFFS
                           RESALE PRODUCTS & SERVICES
                  GTE ARKANSAS (CONTEL) GENERAL EXCHANGE TARIFF

<TABLE>
<CAPTION>
                                                                    BILLING     RESALE    DISCOUNT    RETAIL    AVOIDED    RESALE
ST   CO   RULE  SEC              SERVICE DESCRIPTION                  TYPE     POSITION   POSITION     RATE      COST       RATE
<S> <C>    <C>  <C>     <C>                                          <C>         <C>        <C>       <C>        <C>       <C>
             2                                                                             
             2            Wide Area Telecommunications Services:                           
             2            800 Service:                                                     
AR    CON    2    WATS          Access Line                           MRC        Yes       Yes        $38.00       $4.53    $33.47
             2                  Usage Rates (per Hour):                                                                     
AR    CON    2    WATS            Day - First 10 Hours               USAGE       Yes       Yes        $18.00       $2.15    $15.85
AR    CON    2    WATS            Day - Next 15 Hours                USAGE       Yes       Yes        $16.20       $1.93    $14.27
AR    CON    2    WATS            Day - Next 25 Hours                USAGE       Yes       Yes        $14.40       $1.72    $12.68
AR    CON    2    WATS            Day - Over 50 Hours                USAGE       Yes       Yes        $12.60       $1.50    $11.10
             2                                                                                                              
AR    CON    2    WATS            Evening - First 10 Hours           USAGE       Yes       Yes        $15.00       $1.79    $13.21
AR    CON    2    WATS            Evening - Next 15 Hours            USAGE       Yes       Yes        $13.20       $1.57    $11.63
AR    CON    2    WATS            Evening - Next 25 Hours            USAGE       Yes       Yes        $12.00       $1.43    $10.57
AR    CON    2    WATS            Evening - Over 50 Hours            USAGE       Yes       Yes        $10.80       $1.29     $9.51
             2                                                                                                              
AR    CON    2    WATS            Night/Weekend - First 10 Hours     USAGE       Yes       Yes         $9.60       $1.15     $8.45
AR    CON    2    WATS            Night/Weekend - Next 15 Hours      USAGE       Yes       Yes         $8.40       $1.00     $7.40
AR    CON    2    WATS            Night/Weekend - Next 25 Hours      USAGE       Yes       Yes         $7.20       $0.86     $6.34
AR    CON    2    WATS            Night/Weekend - Over 50 Hours      USAGE       Yes       Yes         $6.60       $0.79     $5.81
             2                                                                                                              
             2                                                                                                              
             2               Outward WATS:                                                                                  
AR    CON    2    WATS          Access Line                           MRC        Yes       Yes        $38.00       $4.53    $33.47
             2                  Usage Rates (per Hour):                                                                     
AR    CON    2    WATS            Day - First 10 Hours               USAGE       Yes       Yes        $10.80       $1.29     $9.51
AR    CON    2    WATS            Day - Next 15 Hours                USAGE       Yes       Yes         $9.60       $1.15     $8.45
AR    CON    2    WATS            Day - Next 25 Hours                USAGE       Yes       Yes         $8.40       $1.00     $7.40
AR    CON    2    WATS            Day - Over 50 Hours                USAGE       Yes       Yes         $6.60       $0.79     $5.81
             2                                                                                                              
AR    CON    2    WATS            Evening - First 10 Hours           USAGE       Yes       Yes         $9.60       $1.15     $8.45
AR    CON    2    WATS            Evening - Next 15 Hours            USAGE       Yes       Yes         $8.40       $1.00     $7.40
AR    CON    2    WATS            Evening - Next 25 Hours            USAGE       Yes       Yes         $7.20       $0.86     $6.34
AR    CON    2    WATS            Evening - Over 50 Hours            USAGE       Yes       Yes         $6.00       $0.72     $5.28
             2                                                                                                              
AR    CON    2    WATS            Night/Weekend - First 10 Hours     USAGE       Yes       Yes         $6.60       $0.79     $5.81
AR    CON    2    WATS            Night/Weekend - Next 15 Hours      USAGE       Yes       Yes         $6.00       $0.72     $5.28
AR    CON    2    WATS            Night/Weekend - Next 25 Hours      USAGE       Yes       Yes         $5.40       $0.64     $4.76
AR    CON    2    WATS            Night/Weekend - Over 50 Hours      USAGE       Yes       Yes         $4.80       $0.57     $4.23
             2                                                                                                              
             2                                                                                                              
             2               Business Line 800:                                                                             
AR    CON    2    WATS       Access Line                              MRC        Yes       Yes         $5.00       $0.60     $4.40
             2                                                                                                              
             2               Usage Rates:                                                                                   
             2                  Per Minute of Use Plan:                                                                     
</TABLE>

                                   Page 17
<PAGE>   131
                          GTE ARKANSAS (CONTEL) TARIFFS
                           RESALE PRODUCTS & SERVICES
                  GTE ARKANSAS (CONTEL) GENERAL EXCHANGE TARIFF

<TABLE>
<CAPTION>
                                                                    BILLING     RESALE    DISCOUNT    RETAIL    AVOIDED    RESALE
ST   CO   RULE  SEC              SERVICE DESCRIPTION                  TYPE     POSITION   POSITION     RATE      COST       RATE
<S> <C>    <C>  <C>     <C>                                          <C>         <C>        <C>       <C>        <C>       <C>
AR    CON    2    WATS         Day Rate                           USAGE          Yes       Yes          $0.20     $0.02      $0.18
AR    CON    2    WATS         Evening/Night/Weekend Rate         USAGE          Yes       Yes          $0.18     $0.02      $0.16
             2               Two Hour Block Plan:                                                                         
AR    CON    2    WATS         Initial Period                     USAGE          Yes       Yes         $21.60     $2.58     $19.02
AR    CON    2    WATS         Each Additional Minute             USAGE          Yes       Yes          $0.17     $0.02      $0.15
             2               Five Hour Block Plan:                                                                        
AR    CON    2    WATS         Initial Period                     USAGE          Yes       Yes         $45.00     $5.37     $39.63
AR    CON    2    WATS         Each Additional Minute             USAGE          Yes       Yes          $0.14     $0.02      $0.12
             2                                                                                                            
             2            Change Charges:                                                                              
AR    CON    2    WATS       Number of Terminations Changed                                                       
                               (1 or 2 Terms)                      NRC           Yes        No         $20.00       N/A     $20.00
AR    CON    2    WATS       Number of Terminations Changed       
                               (3 to 10 Terms)                     NRC           Yes        No         $90.00       N/A     $90.00
AR    CON    2    WATS       Number of Terminations Changed                                                                
                               (Over 10 Terms)                     NRC           Yes        No        $225.00       N/A    $225.00
             2                                                                                                             
AR    CON    2    WATS    Change Billing Arrangement Charge        NRC           Yes        No         $12.50       N/A     $12.50
             2                                                                                                             
AR    CON    2    WATS    Charge to Change Usage Plans             NRC           Yes        No          $5.00       N/A      $5.00
             2                                                                                                             
AR    CON    2    WATS    Call Detail Information per Account                                                              
                            Charge swb tariff                      NRC            No        No         $12.50       N/A        N/A
             2                                                                                                             
             2                                                                                                             
             2            Residence Line 800:                                                                              
AR    CON    2    WATS    Access Line                              MRC           Yes       Yes          $3.95     $0.47      $3.48
             2                                                                             
             2            Usage Rates:                                                     
             2               Per Minute of Use Plan:                                       
AR    CON    2    WATS         Day Rate                           USAGE          Yes       Yes          $0.20     $0.02      $0.18
AR    CON    2    WATS         Evening/Night/Weekend Rate         USAGE          Yes       Yes          $0.18     $0.02      $0.16
             2               One Hour Block Plan:                                                                 
AR    CON    2    WATS         Initial Period                     USAGE          Yes       Yes          $9.00     $1.07      $7.93
AR    CON    2    WATS         Each Additional Minute             USAGE          Yes       Yes          $0.14     $0.02      $0.12
             2               Two Hour Block Plan:                                                                 
AR    CON    2    WATS         Initial Period                     USAGE          Yes       Yes         $15.00     $1.79     $13.21
AR    CON    2    WATS         Each Additional Minute             USAGE          Yes       Yes          $0.12     $0.01      $0.11
             2                                                                                                    
             2            Change Charges:                                                                         
AR    CON    2    WATS       Number of Terminations Changed                                
                               (1 or 2 Terms)                      NRC           Yes        No         $20.00       N/A     $20.00
AR    CON    2    WATS       Number of Terminations Changed                                
                               (3 to 10 Terms)                     NRC           Yes        No         $90.00       N/A     $90.00
AR    CON    2    WATS       Number of Terminations Changed                                
                               (Over 10 Terms)                     NRC           Yes        No        $225.00       N/A    $225.00
             2                                                                             
AR    CON    2    WATS    Change Billing Arrangement Charge        NRC           Yes        No         $12.50       N/A     $12.50
             2                                                                             
AR    CON    2    WATS    Charge to Change Usage Plans             NRC           Yes        No          $5.00       N/A      $5.00
             2                                                                             
AR    CON    2    WATS    Call Detail Information per Account 
                            Charge                                 NRC            No        No         $12.50       N/A        N/A
</TABLE>

                                   Page 18
<PAGE>   132
                          GTE ARKANSAS (CONTEL) TARIFFS
                           RESALE PRODUCTS & SERVICES
                  GTE ARKANSAS (CONTEL) GENERAL EXCHANGE TARIFF

<TABLE>
<CAPTION>
                                                                    BILLING     RESALE    DISCOUNT    RETAIL    AVOIDED    RESALE
ST   CO   RULE  SEC              SERVICE DESCRIPTION                  TYPE     POSITION   POSITION     RATE      COST       RATE
<S> <C>    <C>  <C>     <C>                                          <C>         <C>        <C>       <C>        <C>       <C>
             2                                                                         
</TABLE>

                                   Page 19
<PAGE>   133

                          GTE ARKANSAS (CONTEL) TARIFFS
                           RESALE PRODUCTS & SERVICES
                  GTE ARKANSAS (CONTEL) GENERAL EXCHANGE TARIFF

<TABLE>
<CAPTION>
                                                                    BILLING     RESALE    DISCOUNT    RETAIL    AVOIDED    RESALE
ST   CO   RULE  SEC              SERVICE DESCRIPTION                  TYPE     POSITION   POSITION     RATE      COST       RATE
<S> <C>    <C>  <C>     <C>                                          <C>         <C>        <C>       <C>        <C>       <C>
             2                                                                         
GTE   AR     2                                                                         
             2                                                                         
             2          SPECIAL ACCESS SERVICES                                      
             2          DIGITAL DATA SERVICE -asso. with Sw. 
                          Data Svc.                     
AR    CON    2    7     CIRCUIT MILEAGE (FIXED) 56 KBPS          MRC          Yes          No          $73.75       N/A      $73.75
AR    CON    2    7     CIRCUIT MILEAGE - PER MILE 56 KPBS       MRC          Yes          No           $3.10       N/A       $3.10
             2                                                                                                              
             2                                                                                                              
             2    7     HIGH CAPACITY DS1                                                                                   
             2                                                                                                              
AR    CON    2    7     Circuit term -per pt. of termination     NRC          Yes          No         $900.00       N/A      900.00
AR    CON    2    7     Circuit term -per pt. of termination     MRC          Yes          No         $325.00       N/A     $325.00
AR    CON    2    7     CIRCUIT MILEAGE (FIXED) 1.544 mbps       MRC          Yes          No          $60.00       N/A      $60.00
AR    CON    2    7     CIRCUIT MILEAGE - PER MILE 1.544 mpbs    MRC          Yes          No          $17.86       N/A      $17.86
                                                                                                                            
                        Footnote:  (1) If service is priced 
                        below cost, a discount will not apply.

                        Footnote:  (2) The retail rates above do 
                        not include the End User Subscriber Line 
                        Charge (EUSLC).  The ALEC will be
                        responsible for the business or residential 
                        charge, $6.00 and $3.50 respectively.

                        Footnote:  (3) Confidential and proprietary.  
                        This document is subject to the terms and 
                        conditions of the nondisclosure
                        agreement between the CLEC and GTE.
</TABLE>
                        
                                   Page 20
<PAGE>   134




                                 APPENDIX C
                INTERCONNECTION, TELECOMMUNICATIONS SERVICES
                          AND FACILITIES AGREEMENT


                                   BETWEEN


                          GTE MIDWEST INCORPORATED

                          GTE ARKANSAS INCORPORATED


                                     AND


                           DIGITAL TELEPORT, INC.


                           AMENDMENT NO. _________

THIS AMENDMENT (herein so called) is made effective as of_____________,
199___, by and between GTE Midwest Incorporated/GTE Arkansas Incorporated
("GTE") and Digital Teleport, Inc. ("DTI").  GTE and DTI are sometimes referred
to herein collectively as the "Parties" and individually as a "Party."  Either
GTE or DTI may be referred to as "Provider" or "Customer" as the context
requires.

WHEREAS, Provider is providing to Customer and Customer is purchasing from
Provider those Services described in that certain Interconnection,
Telecommunications Services and Facilities Agreement for the State of __________
by and between GTE and DTI dated effective as of________________, 199___(the 
"Agreement"); and

WHEREAS, the Parties desire to amend the Agreement as provided in this
Amendment.

NOW, THEREFORE, in consideration of the terms and conditions contained in this
Amendment, the Parties agree as follows:

1.

2.   ADDITIONAL SERVICES [IF APPLICABLE]

2.1  Provider agrees to provide to Customer and Customer agrees to purchase
     from Provider the following services under the terms and conditions set
     forth in the Agreement and within the service attachment listed below and
     attached to this Amendment:

         
         Service Attachment ______-______________________

2.2  As of the effective date of this Amendment, and continuing through the
     remaining term of the Agreement, ________________________ is
     made a part of the Services provided under the Agreement and Service
     Attachment ___________ shall be deemed to be a Service Attachment to the
     Agreement.

2.3  As of the effective date of this Amendment, and continuing through the
     remaining term of the Agreement, Appendix B, Service Matrix, to the
     Agreement is hereby deleted and Appendix B, Service Matrix, to this
     Amendment is hereby inserted in lieu thereof to reflect the additional
     Services and related Service Locations.

3.   SERVICE LOCATIONS [IF APPLICABLE]

3.1  Provider agrees to provide to Customer and Customer agrees to purchase
     from Provider the following Services in the following locations:

                                     C-1

<PAGE>   135

<TABLE>
<S>                             <C>                            <C>
      Service Location                                               Services
(identified by tandem serving              IP                  (identified by Service
          area)                 (identified by CLLI code)        Attachment Number)
</TABLE>

3.2  As of the effective date of this Amendment, the locations set forth in
     Section 3.1 above shall be deemed Service Locations under the Agreement.

3.3  As of the effective date of this Amendment, and continuing through the
     remaining term of the Agreement, Appendix B, Service Matrix, to the
     Agreement is hereby deleted and Appendix B, Service Matrix, to this
     Amendment is hereby inserted in lieu thereof to reflect additional Service
     Locations.

4.   INTERPRETATION

     All capitalized terms used but not defined herein shall have the meanings
     ascribed to such terms in the Agreement.

5.   EFFECT

     Except as modified herein, the Agreement shall remain in full force and
     effect.

6.   AUTHORITY

     Each person whose signature appears below represents and warrants that he  
     or she has the authority to bind the Party on whose behalf he or she has
     executed this Amendment.

7.   MULTIPLE COUNTERPARTS

     This Amendment may be executed in multiple counterparts, each of which     
     shall be deemed an original, and all of which shall constitute but one and
     the same instrument.

8.   NO OFFER

     Submission of this Amendment for examination or signature does not 
     constitute an offer by Provider for the provision of the products or
     services described herein.  This Amendment will be effective only upon
     execution by both Provider and Customer.

IN WITNESS WHEREOF, the Parties have executed this Amendment on the date or
dates written below effective as of the date first above written.

GTE MIDWEST INCORPORATED                        DIGITAL TELEPORT, INC.  
GTE ARKANSAS INCORPORATED                                               
                                                                        
                                                                        
                                                                        
By                                              By                      
  ----------------------------                    -------------------------  
                                                                        
Name                                            Name                    
    --------------------------                       ----------------------  
                                                                        
Title                                           Title                   
     -------------------------                       ----------------------  
                                                                        
Date                                            Date                    
    --------------------------                       ----------------------  
                                                                        
                                     C-2



<PAGE>   136




                                   APPENDIX D
                             RATES AND CHARGES FOR
                      TRANSPORT AND TERMINATION OF TRAFFIC

General.  The rates contained in this Appendix D are the rates as defined in
Article V and are subject to change resulting from future Commission or other
proceedings, including but not limited to any generic proceeding to determine
GTE's unrecovered costs (e.g., historic costs, contribution, undepreciated
reserve deficiency, or similar unrecovered GTE costs (including GTE's interim
Universal Service Support Surcharge)), the establishment of a competitively
neutral universal service system, or any appeal or other litigation.

Each Party will bill the other Party as appropriate:

      A.   The Local Interconnection rate element that applies to Local
           Traffic on a minute of use basis that each Party switches for
           termination purposes at its wire centers.  The local interconnection
           rate is $0.0063158.

      B.   The Tandem Switching rate element that applies to tandem
           routed Local Traffic on a minute of use basis.  This rate includes
           tandem transport, but does not include the local interconnection
           charge.  The tandem switching rate is $0.0011771.

      C.   The Common Transport Facility rate element that applies to
           tandem routed Local Traffic on a per minute/per mile basis.  The
           Common Transport Facility rate is $0.0000328.

      D.   The Common Transport Terminal element that applies to tandem
           routed Local Traffic on a per minute/per termination basis.  The
           Common Transport Termination rate is $0.0002057.


                                     D-1


<PAGE>   137




                                   APPENDIX E
            RATES AND CHARGES FOR LOCAL NUMBER PORTABILITY USING RCF

General.  The rates contained in this Appendix E are as defined in Article V,
Section 7, and are subject to change resulting from future Commission or other
proceedings, including but not limited to any generic proceeding to determine
GTE's unrecovered costs (e.g., historic costs, contribution, undepreciated
reserve deficiency, or similar unrecovered GTE costs (including GTE's interim
Universal Service Support Surcharge)), the establishment of a competitively
neutral universal service system, or any appeal or other litigation.

In addition, as defined in Article V, Section 3.2.3, the Party providing the
ported number will pay the other Party the rate per line per month for each
ported business line and the rate per line per month for each ported
residential line for the sharing of Access Charges on calls to ported numbers.

<TABLE>
        <S>                                             <C>
         Business Rate Per Line Per Month:                $ .
                                                           - --
         Residential Rate Per Line Per Month:             $ .
                                                           - -- 
SERVICE NUMBER PORTABILITY
- -----------------------------
Remote Call Forwarding                                    $3.70 line/month
        
Simultaneous Call Capability                              $5.70 path/month
        
Non-recurring for Portability                             $10.50
</TABLE>


                                     E-1


<PAGE>   138




                                  APPENDIX F
                         SERVICES AVAILABLE FOR RESALE

General.  The rates contained in this Appendix F are based upon an avoided cost
discount from GTE's retail rates as provided in Article VI, Section 5.3 of the
Agreement to which this Appendix F is attached and are subject to change
resulting from future Commission or other proceedings, including but not
limited to any generic proceeding to determine GTE's unrecovered costs (e.g.,
historic costs, contribution, undepreciated reserve deficiency, or similar
unrecovered GTE costs (including GTE's interim Universal Service Support
Surcharge)), the establishment of a competitively neutral universal service
system, or any appeal or other litigation.

<TABLE>
      <S>                                                       <C>
NON-RECURRING CHARGES FOR RESALE SERVICES
- -----------------------------------------
       Initial Service Order, per order order                   $41.50
       Subsequent Service Order, per order                      $24.00

       Installation, per line                                   $28.75
       Outside Facility Connection Charge, per order*           $Tariffed
</TABLE>


*This charge will apply when field work is required for establishment of new
resale service.  The terms, conditions and rates that apply for this work are
described in GTE's retail local service tariffs.

                                     F-1


<PAGE>   139




                                   APPENDIX G
                         PRICES FOR UNBUNDLED ELEMENTS

General.  The rates contained in this Appendix G are the rates as defined in
Article VII and are subject to change resulting from future Commission or other
proceedings, including but not limited to any generic proceeding to determine
GTE's unrecovered costs (e.g., historic costs, contribution, undepreciated
reserve deficiency, or similar unrecovered GTE costs (including GTE's interim
Service Support Surcharge)), the establishment of a competitively neutral
universal service system, or any appeal or other litigation.



<TABLE>
<S>                                                                     <C>         
(1)     Local Loops                                                                 
        Local Loop                                                                  
                2 Wire Loop                                             $  46.21    
                4 Wire Loop                                             $  69.19    
        Network Interface Device                                                    
                Basic NID                                               $   1.60    
                12x NID                                                 $   2.20    
                                                                                    
                                                                                    
(2)     Local Switching (Must purchase Port)                                        
        Ports                                                                       
               2 Wire Basic Port                                        $   3.70    
               DS-1 Port                                                $ 101.80    
                                                                                    
        Local Switching                                                             
               Originating MOU                                          $ 0.0063158 
               Terminating MOU                                          $ 0.0063158 
                                                                                    
        Intrastate End Office Switching                                             
               Originating MOU                                          $ 0.0063158 
               Terminating MOU                                          $ 0.0063158 
               Interconnection Charge                                   $ 0.0043952 
               CCL                                                                  
               -Originating                                             State Tariff
               -Terminating                                             State Tariff
                                                                                    
        Interstate End Office Switching                                             
               Originating MOU                                          $ 0.0063158 
               Terminating MOU                                          $ 0.0063158 
               Interconnection Charge                                   $ 0.0043952 
               CCL                                                                  
               -Originating                                             $ 0.0100000 
               -Terminating                                             $ 0.0217290 
                                                                                    
(3)     Features                                                        See Attached
                                                                                    
(4)     Dedicated Transmission Links                                                
        Entrance Facility                                                           
               2 Wire Voice                                             $  36.00    
               4 Wire Voice                                             $  54.00    
               DS1 Standard 1st System                                  $ 325.00    
               DS1 Standard Add'l System                                $ 160.00    
               DS3 Protected, Electrical                                $1,750.00   
               DS1 to Voice Multiplexing                                $ 205.00    
               DS3 to Voice Multiplexing                                $ 490.00    
</TABLE>


                                     G-1


<PAGE>   140


<TABLE>
<S>                                                                     <C>
        Direct Trunked Transport
               Voice Facility Per ALM                                   $   5.33     
               DS1 Facility Per ALM                                     $  12.97     
               DS1 Per Termination                                      $  45.00     
               DS3 Facility Per ALM                                     $  60.00     
               DS3 Per Termination                                      $ 300.00     
                                                                        
                                                                        
(5)     Common/Shared Transmission Links
        Transport Termination MOU/Term                                  $  0.0002057  
        Transport Facility MOU/Mile                                     $  0.0000328  

(6)     Tandem Switching MOU                                            $  0.0011771  
                                                                        
                                                                        
(7)     Databases and Signaling Systems                                 
        Signaling Links and STP                                         
               56 Kbps Links                                            $  99.54
               DS-1 Link                                                $ 168.09
               Signal Transfer Point (STP) Port Term                    $ 226.00
        Call Related Databases
               Line Information Database (ABS-Queries)                  $  0.035
               Line Information Database Transport (ABS-Queries)        $  0.0046
               Toll Free Calling Database (DB800 Queries)               $  0.0101230

Non-Recurring Charges for Unbundled Services

Service Ordering (loop or port)
        Initial Service Order, per order                                $  47.25 
        Transfer of Service Charges, per order                          $  16.00 
        Subsequent Service Order, per order                             $  24.00 
        Customer Service Record Research, per request                   $  5.25 

Installation                                                               
        Unbundled Loop, per loop                                       $  11.75 
        Unbundled Port, per port                                       $  11.75 
                                                                           
Loop Facility Charge, per order                                        $  68.25
        This charge will apply when field work is required for establishment of new unbundled loop service.

Monthly Recurring Charge for EIS
        DS0 Level Connection                                            $  2.17
        DS1 Level Connection                                            $  4.96
</TABLE>





                                     G-2


<PAGE>   141










                               ARKANSAS FEATURES

<TABLE>
<CAPTION>
    FEATURE NAME:                                              GTE PROPOSED RATE:
    -------------                                              ------------------
    <S>                                                        <C>
    1.       Speed Call 8 (Changeable)                               $0.25     
    2.       Speed Call 30 (Changeable)                              $0.25     
    3.       Cancel Call Waiting                                     $0.25     
    4.       Call Forward Variable                                   $0.25     
    5.       Call Waiting                                            $0.25     
    6.       Dual Tone Multifrequency (DTMF)                         $0.25     
    7.       Teen Service/Distinctive Ringing                        $0.25     
    8.       Three-Way Calling                                       $0.75     
    9.       Account Codes For AFR                                   $0.25     
    10.      Add On - Consultation Hold - Incoming Only              $0.25     
    11.      Attendant BL Verification                               $1.00     
    12.      Attendant camp-on (NonDL Console)                       $0.50     
    13.      Attendant Conference                                    $3.00     
    14.      Attendant Position Busy                                 $1.00     
    15.      Attendant Recall from Satellite                         $1.75     
    16.      Authorization Codes for AFR                             $0.25     
    17.      Basic Business Group                                    $2.50     
    18.      Dual Tone Multifrequency (DTMF)                         $0.25     
    19.      Station-to-Station Dialing (Intercom)                   $2.50     
    20.      Business Group Automatic Callback (BGAC)                $0.25     
    21.      Call Forwarding Variable                                $0.25     
    22.      Business Group - Speed Call - 8                         $0.25     
    23.      Business Group - Speed Call - 30                        $0.25     
    24.      Business Group - Three Way Calling (TWC)                $0.75     
    25.      Business Set Access To Paging                           $2.00     
    26.      Business Set Call Grp Intercom                          $173.00   
    27.      Code Calling                                            $0.50     
    28.      Call Forward Busy Line                                  $0.25     
    29.      Call Forward Don't Answer                               $0.25     
    30.      Call Forward Fixed                                      $0.25     
    31.      Call Forwarding - Incoming Only                         $0.25     
    32.      Call Flip/Flop                                          $0.25     
    33.      Call Forwarding - Within Group                          $0.25     
    34.      Call Hold                                               $0.25     
    35.      Circular Hunting                                        $0.25     
    36.      Control of Facilities                                   $0.25     
    37.      Conference Calling 6 Way                                $3.00     
    38.      Call Park                                               $0.25     
    39.      Call Pick-Up                                            $0.25     
    40.      Code Restrictions and Diversion                         $0.75     
    41.      Call Transfer Individual - All Calls                    $0.25     
    42.      Call Waiting Originating                                $0.25     
    43.      Call Waiting Terminating                                $0.25     
    44.      Direct Connect                                          $0.25     
    45.      Directed Call Pickup W/BI                               $0.25     
    46.      Directed Call Pickup WO/BI                              $0.25     
    47.      Dial Call Waiting                                       $0.25     
                                                                               
</TABLE>                                                                       

                                     G-3



<PAGE>   142

                               ARKANSAS FEATURES

<TABLE>
<CAPTION>

    FEATURE NAME:                                              GTE PROPOSED RATE:
    -------------                                              ------------------
    <S>                                                        <C>
    48.      Remote Access to (Business Group) Features              $0.25
    49.      Expensive Route Warning Tone                            $0.25
    50.      Fixed Night Service - Call Fwd                          $0.25
    51.      Fixed Night Service - Key                               $1.75
    52.      Fully Restricted (Orig/Term)                            $0.25
    53.      Facility Restriction Level                              $0.75
    54.      Foreign Exchange Facilities                             $0.50
    55.      Last Number Redial                                      $0.25
    56.      Loud Speaker Paging                                     $0.50
    57.      Make Busy Key                                           $0.50
    58.      Music on Hold                                           $0.50
    59.      Off-Hook Queuing                                        $0.25
    60.      On-Hook Queuing                                         $0.25
    61.      Preferential Multiline Hunting                          $0.25
    62.      Queuing                                                 $2.25
    63.      Recorded Telephone Dictation                            $0.50
    64.      Speed Calling Individual 1 Digit                        $0.25
    65.      Speed Calling Individual 2 Digit                        $0.25
    66.      Stop Hunt Key                                           $0.50
    67.      Special Intercept Announcements                         $8.25
    68.      SMDR To Customer Premise                                $17.75
    69.      Station Message Detail Recording - RAO                  $1.25
    70.      Station Restricted (Orig/Term)                          $0.25
    71.      Time of Day Routing Control                             $0.25
    72.      Toll Restricted Service                                 $0.75
    73.      Two-way Splitting                                       $0.25
    74.      Uniform Call Distribution (UCD) Hunting                 $0.25
    75.      Auto Alt Rt                                             $0.50
    76.      Auto Rt Sel                                             $0.25
    77.      Meet Me Conf                                            $18.00
    78.      Automatic Busy Redial                                   $0.25
    79.      Automatic Call Rejection                                $0.25
    80.      Auto Recall                                             $0.25
    81.      Calling Number ID                                       $0.25
    82.      Cancel Calling Number Delivery, per line                $0.25
    83.      Customer Orig. Trace                                    $0.25
    84.      VIP Alert                                               $0.25
    85.      Special Call Acceptance                                 $0.25
    86.      Select Call Frwd                                        $0.25
    87.      Select Call Reject                                      $0.25
    88.      Select Call Wait                                        $0.25
             ----------------                                        -----
             TOTAL                                                   $262.00
</TABLE>

                                     G-4



<PAGE>   143




                                       APPENDIX H
                 RATES AND CHARGES FOR 911/E911 ARRANGEMENTS

The following services are offered by GTE for purchase by DTI, where an
individual item is not superseded by a tariffed offering.

<TABLE>
<CAPTION>
                                                                NRC         MRC
                                                              -------     -------
<S>                                                           <C>         <C>
1.   9-1-1 Selective Router Map                               $125.00       n/a
     Provided is a color map showing a selective router's
     location and the GTE central offices that send their
     9-1-1 call to it.  The selective router and central
     office information will include CLLI codes and
     NPA/NXXs served.  The map will include boundaries of
     each central office and show major streets and the
     county boundary.  Permission to reproduce within DTI
     for its internal use is granted without further fee.
     Non-tariffed price.

2.   9-1-1 Selective Router Pro-Rata Fee/trunk                  $0         $100.77
     This fee covers the cost of selective routing switch
     capacity per trunk to cover investment to handle the
     additional capacity without going to the 9-1-1
     districts for additional funding.

3.   PS ALI Software                                          $790.80
     a personal computer software program running on
     Windows 3.1(TM) for formatting subscriber records into
     NENA Version #2 format to create files for uploading
     to GTE's ALI Gateway.  Fee includes software, warranty
     and 1 800 872-3356 support at no additional cost.

4.   ALI Gateway Service                                      $135.00      $36.12
     Interface for delivery of ALI records to GTE's Data
     Base Management System.  This provides a computer
     access port for DTI to transmit daily subscriber
     record updates to GTE for loading into ALI databases.
     It includes support at 1 800 872-3356 at no additional
     cost.

5.   9-1-1 Interoffice Trunk                                   Tariff      Tariff
     This is a tariffed offering, to be found in each
     state's Emergency Number Service Tariff.

6.   ALI Database                                              Tariff      Tariff
     This is a tariffed offering, to be found in each
     state's Emergency Number Service Tariff.
                                                              
7.   Selective Router Database per Record Charge               Tariff      Tariff
     Fee for each ALI record used in a GTE selective
     router.  This is a tariffed offering, to be found in
     each state's Emergency Number Service Tariff.
     
8.   MSAG Copy
     Production of one copy of a 9-1-1 Customer's Master 
     Street Address Guide, postage paid.
     a.   Copy provided in paper format                       $238.50      $54.00
</TABLE>

                                     H-1



<PAGE>   144


                                                                NRC      MRC
                                                              -------  -------
b. Copy provided in flat ASCII file on a 3 1/2" diskette      $276.00   $36.00


                                     H-2


<PAGE>   145




                                   APPENDIX I

            SERVICE ORDERING, PROVISIONING, BILLING AND MAINTENANCE

1.   Service Ordering, Service Provisioning, and Billing Systems Generally.
     The following describes generally the operations support systems that GTE
     will use and the related functions that are available for ordering,
     provisioning and billing for resold services, interconnection facilities
     and services and unbundled network elements.  Except as specifically
     provided otherwise in this Agreement, service ordering, provisioning,
     billing and maintenance shall be governed by the GTE Guide.  Before orders
     can be taken, DTI will provide GTE with as Operating Company Number
     ("OCN") and Company Code ("CC") as follows:

     (a)   The ALEC must provide their OCN (four-digit alpha-numeric
           assigned by Bellcore or number administrator) on the ALEC Profile.
           The GTE Guide provides the necessary information for the ALEC to
           contact Bellcore to obtain the OCN.  There are no optional fields on
           the Profile.

     (b)   Before the Local Service Request ("LSR") and Directory
           Service Request ("DSR") order forms can be processed DTI must
           provide the OCN and Customer Carrier Name Abbreviation ("CCNA").

1.1  Operations Support Systems for Trunk-Side Interconnection

     1.1.1         DTI will be able to order trunk-side interconnection
                   services and facilities from GTE through a direct electronic
                   interface over the GTE Network Data Mover ("NDM") in a
                   nondiscriminatory manner.  Orders for trunk-side
                   interconnection will be initiated by an Access Service
                   Request ("ASR") sent electronically by DTI over the NDM. 
                   ASRs for trunk-side interconnection will be entered
                   electronically into GTE's Carrier Access Management System
                   ("CAMS") to validate the request, identify any errors, and
                   resolve any errors back to DTI.  CAMS is a family of GTE
                   systems comprised primarily of EXACT/TUF, SOG/SOP, and CABS.

     1.1.2         The use of CAMS to support DTI's requests for trunk-side 
                   interconnection will operate in the following manner:  GTE 
                   will route the ASR through its data center to one of two
                   National Access Ordering Centers ("NACC").  The ASR will be
                   entered electronically into the EXACT/TUF system for
                   validation and correction of errors. Errors will be referred
                   back to DTI.  DTI then will correct any errors that GTE has
                   identified and resubmit the request to GTE  electronically
                   through a supplemental ASR, without penalty or charge (e.g.,
                   order modification charge) to DTI.  Similarly, errors
                   committed by GTE subsequent to the receipt of a valid ASR
                   from DTI will be expeditiously identified and corrected by
                   GTE without the need for DTI's submission of a supplemental
                   ASR.  GTE then will translate the ASR into a service order
                   for provisioning and billing. In order to convert the ASR
                   into a service order, GTE personnel must apply the necessary
                   elements to provision the service and include the billable
                   elements necessary for GTE to bill DTI for the services
                   provided.  This application also requires a determination of
                   the access tandem to end office relationships with the
                   service requested.

     1.1.3         At the next system level, translated service orders will be
                   distributed electronically through the SOG/SOP systems to
                   several destinations.  The SOG/SOP system will begin the
                   actual provisioning  of the service for DTI.  Other GTE
                   provisioning systems are CNAS and ACES.  The GTE Database
                   Administrative Group ("DBA") and the Special Services Control
                   Center ("SSCC") will be the two most important destinations
                   at this level.  The DBA location will identify codes for the
                   appropriate

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                   GTE switch in order to provide the functions required by the
                   ASR.  The SSCC will provide the engineering for the 
                   facilities over which the services will be handled. 
                   Information from these two groups (and others) then will be  
                   transmitted electronically to GTE's field service personnel
                   (Customer Zone Technicians or "CZTs") who will establish the
                   trunks and facilities, thus connecting the GTE facilities  to
                   a connecting company, if one is required, and to DTI.   GTE's
                   CZTs also will contact DTI directly to perform  testing , and
                   upon acceptance by DTI, will make the necessary entries into
                   the GTE system to complete the order.  The completed orders
                   then will pass to GTE's Carrier Access Billing System
                   ("CABS") which will generate the bill to DTI.  The billing
                   process under CABS requires coordination with several other
                   systems.

     1.1.4         Billing for transport and termination services cannot be
                   accomplished without call records from GTE's central office
                   switches.  Records of usage will be generated at GTE's end
                   office switches or the access tandems.  Call usage records
                   will be transmitted electronically from GTE's switches
                   through GTE's Billing Intermediate Processor ("BIP").  This
                   system will collect the call records, perform limited
                   manipulations to the record and transfer them to a
                   centralized data center where they will be processed through
                   the Universal Measurement System ("UMS") to determine the
                   validity and accuracy of the records.  UMS also will sort the
                   records and send them to the CABS billing system, from which
                   GTE will produce a bill and send it to DTI.

1.2  Operations Support Systems for Resold Services and Unbundled Elements

     1.2.1         DTI will also be able to order services for resale and
                   unbundled network elements, as well as interim number
                   portability, directly from GTE through an electronic
                   interface.  To initiate an order for these services or
                   elements, DTI will submit a Local Service Request ("LSR")
                   from its data center to GTE's Data Center using the same
                   electronic NDM interface used for trunk-side 
                   interconnection.  If no NDM interface exists or if DTI
                   chooses to establish a separate NDM interface, DTI must
                   request an NDM facility.  For new entrants that elect not to
                   interface electronically, GTE will accommodate submission
                   of LSR orders by facsimile, E-mail, Internet or a dial NDM
                   arrangement.  An LSR is very similar to an ASR, except that
                   it will be used exclusively for line-side interconnection
                   requests.  GTE will transfer LSRs to GTE's NOMC centralized
                   service order processing center electronically.

     1.2.2         Most LSRs will be used either to transfer an existing GTE
                   customer to DTI or to request service for a new customer who
                   is not an existing GTE customer.  Depending on the situation,
                   different information will be required on the LSR.  LSRs for
                   a conversion of a GTE local customer to DTI must include
                   information relating to all  existing, new and disconnected
                   services for that customer, including the customer's name,
                   type of service desired, location of service and features or
                   options the customer desires.  DTI will be able to obtain
                   this customer information after GTE has received the
                   customer's written consent as specified in Article VI.3.3. 
                   For service to a new customer who is not an existing GTE
                   customer, the LSR must contain the customer's name, service
                   address, service type, services, options, features and ALEC
                   data.  If known, the LSR should include the telephone number
                   and due date/desired due date.

     1.2.3         While DTI would have its own customer information and may
                   have the SAG/GTE products on tape from GTE, DTI would not
                   have the due date or new telephone number for new customers
                   since that information is contained in GTE's systems. 
                   Therefore, a process is required to provide this information
                   to DTI.  GTE itself does not have uniform access to this
                   information electronically.  Until GTE and DTI have 

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                   agreed and established electronic interfaces, DTI agrees that
                   an 800 number is the method that will be used.  The 800 
                   telephone number will connect DTI directly to GTE's NOMC
                   service representatives.  When DTI receives a request for
                   basic services from a new local service customer, DTI will
                   call GTE's NOMC through the 800 number, and, while the new
                   customer is on hold, GTE will provide the due date for
                   service and the new telephone number for that customer.  At
                   the same time, DTI will give GTE the new customer's name,
                   service address and type of requested service (i.e., R1, B1).
                   GTE will enter that information into its SORCES or SOLAR
                   service ordering systems to be held in suspense until DTI
                   sends the confirming LSR.  DTI will then return to its
                   customer holding on the line and provide the due date and new
                   telephone number.

     1.2.4         After concluding the telephone call with the new customer,
                   DTI will complete a confirming LSR for the new service and
                   send it electronically to GTE's data center for processing.
                   Upon receipt, GTE will match the LSR with the service order
                   suspended in GTE's system, and if there is a match, GTE
                   will process the LSR.  After the LSR is processed, GTE will
                   transmit confirmation electronically to DTI through the NDM
                   that the LSR has been processed, providing a record of the
                   telephone number and due date.  DTI will be required to 
                   submit the confirming LSR by 12:00 p.m. each day local
                   time, as defined by the location of the service address.  If
                   DTI fails to submit the LSR in a timely manner, the suspended
                   LSR will be considered in jeopardy, at which time GTE will
                   assign a new due date upon receipt of the delayed LSR for
                   such customer requests and notify DTI of the change.

     1.2.5         Number assignments and due date schedules for services other
                   than single line service and hunt groups up to 12 lines will
                   be assigned within approximately twenty-four (24) hours after
                   GTE's receipt of the LSR using the standard Local 
                   Confirmation ("LSC") report sent electronically to DTI over
                   the NDM, thereby providing a record of the newly established
                   due date.  An exception would be a multi-line hunt group for
                   12 lines or fewer.  The other numbers then will be provided
                   through the normal electronic confirmation process.

      1.2.6        The processing of specifically requested telephone numbers
                   (called "vanity numbers") is as follows.  GTE will work with
                   DTI on a real time interface to process vanity numbers while
                   DTI's customer is still on the line.  If a number solution
                   can be established expeditiously, it will be done while the
                   customer is still on the line.  If extensive time will be
                   required to find a solution, GTE service representatives will
                   work with DTI representatives off line as GTE would for its
                   own customers.  For all of this, the basic tariff guidelines
                   for providing telephone numbers will be followed.

     1.2.7         Once the order for line-side interconnection service is
                   established, it is moved for provisioning to the next system
                   level. Here, GTE will validate and process the LSR to
                   establish an account for DTI and, if GTE continues to provide
                   some residual services to the customer, GTE will maintain
                   a GTE account.  In GTE's system, GTE's account is called the
                   Residual Account and DTI's account is referred to as DTI
                   Account.  If any engineering for the service is necessary,
                   the account would be distributed to the SSCC.  Otherwise, it
                   will be distributed for facility assignment.

     1.2.8         With the account established and any engineering and
                   facility assignment complete, GTE then will transmit
                   electronically a record to GTE's CZT field personnel if
                   physical interconnection or  similar activity is required. 
                   The CZTs will provision the service and then electronically
                   confirm such provision in the SOLAR/SORCES system when
                   completed.  The accounts then will be transmitted to GTE's
                   Customer Billing Services System ("CBSS").  GTE shall 
                   provide to DTI a


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                   service completion report.  Call records for actual service
                   provided to DTI's customers on GTE facilities will be
                   transmitted from GTE's switches through some usage rating
                   systems (BIP, UMS), screened and eventually delivered to CBSS
                   for the generation of bills.

     1.2.9         CBSS is a different system than CABS, and it is the one that
                   GTE will utilize to produce the required bills for resold
                   services, unbundled elements and local number portability. 
                   CBSS will create a bill to DTI for resold services and
                   unbundled elements along with a summary bill master. 
                   Daily unrated records for intraLATA toll usage and local
                   usage (in collect usage data will be provided on rated basis)
                   on DTI's accounts will be generated and transmitted
                   electronically to DTI.

     1.2.10        On resold accounts, GTE will provide usage in EMR format per
                   existing file exchange schedules.  The usage billing will be
                   in agreed upon level of detail for DTI to issue a bill to
                   its end users.

      1.2.11       GTE will provide DTI with detailed monthly billing
                   information in a paper format until an agreed upon 
                   Electronic Data Interchange 811 electronic bill format is
                   operational.

      1.2.12       State or sub-state level billing will include up to ten (10)
                   summary bill accounts.

      1.2.13       GTE accepts DTI's control reports and agrees to utilize 
                   industry standard return codes for unbillable messages. 
                   Transmission will occur via the NDM.  Tape data will conform
                   to Attachment "A" of the LRDTR.  Data will be delivered
                   Monday through Friday except for Holidays as agreed.  Data
                   packages will be tracked by invoice sequencing criteria.  GTE
                   contacts will be provided for sending/receiving usage files.

      1.2.14       GTE will retain data backup for 45 Business Days.  To the 
                   extent this retention is exclusively for DTI, DTI shall
                   reimburse GTE for all expenses related to this retention.

      1.2.15       In addition to the LSR delivery process, DTI will distribute
                   directory assistance and directory listing information
                   (together sometimes referred to hereafter as "DA/DL
                   information") to GTE via the LSR ordering process over the
                   NDM.  GTE will provide listings service via its "listing
                   continuity" offering.

      1.2.16       Charges and credits for PIC changes ordered via an LSR will
                   appear on the wholesale bill.  As DTI places a request for a
                   PIC change via LSR, the billing will be made on DTI account  
                   associated with each individual end user.  GTE will process
                   all PIC changes from IXCs that are received for DTI end users
                   by rejecting back to the IXC with DTI OCN.   Detail is
                   provided so that DTI can identify the specific charges for
                   rebilling to their end user.

      1.2.17       CMDS.  The parties will provide for the distribution of 
                   intraLATA CMDS incollect messages and/or selected local
                   measured service messages as follows:

                   1.2.17.1       Messages to be Screened.  GTE receives CMDS I
                                  transmissions containing intraLATA incollect
                                  messages from the state RBOC CMDS host each
                                  business day.  Per DTI's request, GTE will
                                  screen the incollects by NPA and line
                                  number and accumulate the Collect, Third
                                  Number Billed and Credit Card (collectively
                                  called incollects) messages in a data file. 
                                  The screening will be 


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                                  for end users who have chosen DTI as their
                                  local service provider through a Resale or
                                  Unbundled Network arrangement.  The screened
                                  incollect messages and any Local Measured
                                  Service (LMS) usage will be accumulated       
                                  and forwarded to DTI.  The Parties will
                                  mutually agree on the frequency of the data
                                  exchange and the method of transmission (i.e.,
                                  magnetic tape or direct electronic
                                  transmission).  GTE will forward the screened
                                  messages in the industry standard EMR format. 
                                  GTE intraLATA toll messages that are recorded
                                  by GTE and dialed on a one plus or zero plus
                                  basis are not part of this section and will
                                  not be screened.

                   1.2.17.2       Compensation.  GTE will bill DTI monthly for
                                  all services related to the screening,
                                  accumulating, processing and transmitting of
                                  incollect messages and LMS usage, if
                                  applicable, at a reasonable and mutually
                                  agreeable charge.  In addition, any message
                                  processing fee associated with DTI's incollect
                                  messages that are charged to GTE by the CMDS
                                  Host will be passed on to DTI on the monthly
                                  statement.  All revenue, surcharges, taxes and
                                  any other amounts due to the CMDS Host for
                                  DTI's incollect messages will be billed on the
                                  monthly statement.  It is DTI's responsibility
                                  to bill and collect all incollect and LMS
                                  amounts due from its end users.  The incollect
                                  and LMS revenue amounts that are listed on the
                                  monthly invoice are payable to GTE in total. 
                                  The Parties agree that the arrangement for
                                  invoicing the incollect and LMS revenue
                                  amounts due GTE is not a settlement process
                                  with DTI.

                   1.2.17.3       Administration.  The Parties agree to 
                                  develop a process whereby DTI's end user
                                  information is available in a timely
                                  manner to allow GTE to build tables to screen
                                  the CMDS incollect files and LMS files on
                                  behalf of DTI.

     1.2.18        Backbilling.  GTE shall bill DTI on a timely basis.  In no 
                   case shall GTE bill DTI for previously unbilled charges that
                   are for more than one year prior to the current bill date.

1.3  Order Processing.

     1.3.1         Order Expectations.  DTI agrees to warrant to GTE that it is
                   a certified provider of telecommunications service.  DTI will
                   document its Certificate of Operating Authority on DTI
                   Profile and agrees to update this DTI Profile as required to
                   reflect its current  certification.  The Parties agree to
                   exchange and to update end user contact and referral numbers
                   for order inquiry, trouble reporting, billing inquiries, and
                   information required to comply with law enforcement and other
                   security agencies of the government.  The Parties also agree
                   to exchange and to update internal order, repair and billing
                   point of contacts.  Prior to submitting an order under this
                   Agreement, DTI shall obtain such documentation as may be
                   required by state and federal laws and regulations.

     1.3.2         GTE shall provide DTI with a specified customer contact
                   center for purposes of placing service orders and
                   coordinating the installation of services.  These activities
                   shall be accomplished by telephone call or facsimile until 
                   electronic interface capability has been established.  The 
                   Parties adopt the OBF LSR and DSR forms for the ordering, 
                   confirmation and billing of resale and unbundled services. 
                   The 


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                   Parties adopt the OBF ASR forms for the ordering,    
                   confirmation and billing of trunk-side interconnection.

     1.3.3         GTE will process such service orders during normal operating
                   hours, at a minimum on each Business Day between the hours of
                   8 a.m. to 8 p.m. Eastern Time and shall implement service 
                   orders within the same time intervals used to implement 
                   service orders for similar services for its own users.

     1.3.4         GTE will provide current GTE customer proprietary network
                   information (name, address, telephone number and description
                   of services provided by GTE including PIC and white page
                   directory listing information) as provided in Article VI,
                   Section 3.  The return of customer information will be via
                   facsimile or via electronic transmission.

     1.3.5         Transfer Between Local Service Providers - GTE will provide
                   a displacement/out service report to a Local Service Provider
                   (LSP) whenever an end user leaves that LSP and procures 
                   service from another LSP.  When DTI end user changes to 
                   another LSP, GTE will notify DTI when such activity occurs
                   the day after completion or within 48 hours of such
                   disconnect.

2.   Maintenance Systems.

2.1  General Overview

     2.1.1         If DTI requires maintenance for its local service customers,
                   DTI will initiate a request for repair (sometimes referred to
                   as a "trouble report") by calling GTE's Customer Care Repair
                   Center. During this call, GTE service representatives will
                   verify that the end-user is DTI customer and will then obtain
                   the necessary information from DTI to process the trouble
                   report.  While DTI representatives are still on the line, GTE
                   personnel will perform an initial analysis of the problem
                   and remote line testing for resale services.  If engineered
                   services are involved, the call will be made to the GTE SSCC
                   for handling.  If no engineering is required and the line
                   testing reveals that the trouble can be repaired remotely,
                   GTE personnel will correct the problem and close the trouble
                   report while DTI representatives are still on the line.  If
                   on-line resolution is not possible, GTE personnel will
                   provide DTI representatives a commitment time for repair, and
                   the GTE personnel then will enter the trouble ticket into the
                   GTE service dispatch queue.  DTI's repair service commitment
                   times will be within the same intervals as GTE provides to
                   its own end users.  Maintenance and repair of GTE facilities
                   is the responsibility of GTE and will be performed at no
                   incremental charge to DTI.  If, as a result of DTI-initiated
                   trouble report, trouble is found to be the responsibility of
                   DTI (e.g., non-network cause) GTE will charge DTI for trouble
                   isolation.  DTI will have the ability to report trouble for
                   its end users to appropriate trouble reporting centers 24
                   hours a day, 7 days a week.  DTI will be assigned a customer
                   contact center when initial service agreements are made.

     2.1.2         Repair calls to the SSCC for engineered services will be
                   processed in essentially the same manner as those by the GTE
                   Customer Care Center.  GTE personnel will analyze the
                   problem, provide DTI representative with a commitment time 
                   while they are still on the line, and then place the trouble
                   ticket in the dispatch queue.

     2.1.3         GTE then will process all DTI trouble reports in the 
                   dispatch queue along with GTE trouble reports in the order
                   they were filed (first in, first out), with priority given to
                   out-of-service conditions.  If, at any time, GTE would
                   determine that a commitment time given to DTI becomes in
                   jeopardy, GTE service representatives will contact 


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                   DTI by telephone to advise of the jeopardy condition and
                   provide a new commitment time.

     2.1.4         Trouble reports in the dispatch queue will be transmitted
                   electronically to GTE CZT service technicians who will repair
                   the service problems and clear the trouble reports.  For
                   cleared DTI trouble reports, GTE service technicians will
                   make a telephone call to DTI directly to clear the trouble
                   ticket.  GTE service technicians will make the confirmation
                   call to the telephone number provided by DTI.  If DTI is
                   unable to process the call or places the GTE technician on
                   hold, the call will be terminated.  To avoid disconnect, DTI
                   may develop an answering system, such as voice mail, to
                   handle the confirmation calls expeditiously.

     2.1.5         GTE will provide electronic interface access to operation
                   support systems functions which provide the capability to
                   initiate, status and close a repair trouble ticket.  GTE
                   will not provide to DTI real time testing capability on DTI
                   end user services.  GTE will not provide to DTI an interface
                   for network surveillance (performance monitoring).

     2.1.6         GTE will resolve repair requests by or for DTI local service
                   customers using GTE's existing repair system in parity with
                   repair requests by GTE end users.  GTE will respond to
                   service requests for DTI using the same time parameters and
                   procedures that GTE uses. DTI then would call GTE's Customer
                   Care Center or SSCC while the customers were on hold.

2.2  Network Management Controls.

     2.2.1         Network Maintenance and Management.  The Parties will work
                   cooperatively to install and maintain a reliable network.

     2.2.2         Neither Party shall be responsible to the other if necessary
                   changes in network configurations render any facilities of
                   the other obsolete or necessitate equipment changes.

     2.2.3         Network Management Controls.  Each Party shall provide a
                   24-hour contact number for Network Traffic Management issues
                   to the other's network surveillance management center.  A fax
                   number must also be provided to facilitate event 
                   notifications for planned mass calling events.  Additionally,
                   both Parties agree that they shall work cooperatively that
                   all such events shall attempt to be conducted in such a
                   manner as to avoid degradation or loss of service to other
                   end users.  Each Party shall maintain the capability of
                   respectively implementing basic protective controls such as
                   "Cancel To" and "Call Gap."

3.   Electronic Interface.  The Parties shall work cooperatively in the
     implementation of electronic gateway access to GTE operational support
     systems functions in the long-term in accordance with established industry
     standards.  DTI shall compensate GTE for the full costs including but not
     limited to design, development, testing, implementation and deployment,
     for access to GTE's Operational Support System functions.  Where
      subsequent parties request use of GTE's operation support systems, cost
      recovery for such electronic interface systems shall be allocated among
      all requesting users.

3.1  DTI shall have immediate access to the following OSS electronic
     interfaces that will provide functionality to enable DTI to service
     customers in an equal and non-discriminatory manner:

     3.1.1         Pre-Order functions, e.g., TN Assignment, DD Reservation,
                   Address Validation, Product Availability, that are available
                   on a dial-up or dedicated basis using the Secure Integrated
                   Gateway System (SIGS).


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     3.1.2         Order functions that are available on a dial-up or dedicated
                   basis using CONNECT:  Mail file transfer.

     3.1.3         Repair functions, e.g., trouble report repair functions, to
                   allow DTI to determine status and close trouble reports.

     3.1.4         Electronic transfer of DTI bill in electronic data 811
                   format.

3.2  DTI may migrate to fully interactive system to system interconnectivity.
     GTE, with input from DTI and other carriers, shall provide general
     interface specifications for electronic access to this functionality.
     These specifications will be provided to enable DTI to design system
     interface capabilities.  Development will be in accordance with applicable
     national standards committee guidelines.  Such interfaces will be
     available as expeditiously as possible.

3.3  All costs and expenses for any new or modified electronic interfaces
     exclusively to meet DTI requirements that GTE determines are technically
     feasible and GTE agrees to develop will be paid by DTI.  Costs for
     development of systems intended for common use by competing carriers will
     be assessed based on a mutually agreed method of cost recovery.

3.4  DTI shall be responsible for modifying and connecting any of its
     pre-ordering and ordering systems with GTE provided interfaces as
     described in this Appendix.

4.   GTE Initiated Electronic System Redesigns.  GTE will not charge DTI when
     GTE initiates its own electronic system redesigns/reconfigurations.


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                                  APPENDIX J
                                 SS7 SERVICES

                                  ARTICLE 1.
                                 DEFINITIONS

In addition to the definitions contained elsewhere in the Agreement to which
this Appendix J is attached and made a part, for purposes of this Appendix J
the following terms shall have the following meanings.

1.1  "A" Link:  An access signaling link that connects SPs and/or SSPs to
     STPs.

1.2  "B" Link:  A bridge signaling link that connects two (2) sets or pairs of
     STPs, not the STPs within a mated pair, but on the same hierarchical
     level.

1.3  Compatibility Testing:  Certification testing performed by
     representatives of GTE and DTI to ensure proper interconnection of CCS
     network facilities for accurate transmission of system signals and
     messages.  This certification testing shall be performed in accordance
     with the following ANSI documents:
            T1.234 Telecommunications - Signaling System Number 7 (SS7) - MTP
            Levels 2 and 3 Compatibility Testing (ATIS)
            T1.235 Telecommunications - Signaling System Number 7 (SS7) - SCCP
            Class 0 Compatability Testing (ATIS)
            T1.236 Telecommunications - Signaling System Number 7 (SS7) - ISDN
            User Part Compatibility Testing (ATIS)

1.4  Service:  The service described in Article 2 of this Appendix.

1.5  Signaling Link:  An end-to-end high-capacity data link (56 kbps) that
     transmits supervision and control signals from one network SS7 node to
     another in a CCS network.  The link type identifies the functionality of
     the signaling link sets.  The two link types associated with the Service
     are "a" Links and "B" Links.

1.6  Signaling Point Code (SPC):  A code that identifies the Signaling Point
     address in the CCS network.  Signaling Point Codes consist of three (3)
     segments of three (3) digits each, identifying the network ID, network
     cluster, and cluster member, respectively.

1.7  Signaling Point of Interface (SPOI):  The point at which GTE hands off
     signaling information to DTI.

                                  ARTICLE 2.
                             SERVICE DESCRIPTION

2.1  Provision.  Subject to the terms and conditions of this Appendix, GTE
     agrees to provide the Service to DTI.

2.2  Interconnection.  This Agreement is for DTI's interconnection with GTE at
     GTE's ___________________ STPs to support local exchange services.  DTI 
     shall not submit signaling messages in support of interexchange services.

2.3  Service.  The "Service" consists of the following:

     (a)   Interconnection of GTE's CCS/SS7 network to DTI's CCS/SS7
           network is via an "a" Link connection between DTI's SP or SSP and
           GTE's STP.  The "a" Link connection is made by a dedicated 56 kbps
           channel between the SP or SSP and the STP.  Any connection from an
           SSP 


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           or an SP to an STP pair will have a link to each individual STP
           (i.e., two (2) links).  DTI and GTE shall mutually agree upon the
           location of the SPOI.

      (b)  Interconnection of GTE's CCS/SS7 network to DTI's CCS/SS7
           network via a "B" Link connection between DTI's STPs and GTE's STPs.
           The "B" Link connection is a dedicated 56 kbps channel.
           Connections between two (2) pairs of STPs will have four (4)
           connections; i.e., one (1) link from each individual STP to each
           individual STP.  DTI and GTE shall mutually agree upon the location
           of the SPOI.

      (c)  Local and IntraLATA call set-up signaling, allowing DTI to
           use the out-of-band trunk signaling provided by GTE's CCS/SS7
           network to carry its calls on the intraLATA toll network.

      (d)  The Service shall include access to:  (1) all switching
           systems served by a given STP which have been converted to SS7
           signaling, including switching systems owned by other local service
           providers; (2) databases directly connected to a given STP, with the
           exception of 800/888 databases which can be accessed through any
           STP; (3) other local service provider STPs on an intraLATA basis;
           and (4) other Third Party local service provider STPs on an
           intraLATA basis.

      (e)  It is the responsibility of DTI to populate the "privacy
           indicator" portion of all SS7 signaling messages forwarded to GTE's
           network.  GTE agrees to deliver the information forwarded by DTI in
           the SS7 signaling message.  DTI, by entering into this Agreement,
           agrees to deliver "privacy indicator" information forwarded by GTE
           in its signaling message.

      (f)  DTI acknowledges that call set-up times may be greater when
           DTI employs intermediate access tandems (IATs) in its network.

      (g)  If selected on the order form attached to this Appendix, the
           Service shall also include IXC call set-up signaling service (ISUP)
           as described in Article 2.4 of this Appendix.  Additional charges as
           set forth in Exhibit A shall apply.

2.4  ISUP Service Charge.  This is an optional service that allows DTI to
     utilize SS7 signaling to an SS7 capable interexchange carrier (IXC) for
     Feature Group D access service and other intraLATA interexchange services.
     The ISUP service is a monthly charge.

     (a)   The rate for ISUP signaling is per connection in situations
           when GTE does not provide any underlying call messages for DTI on
           GTE's network trunks.  The rate for ISUP signaling is shown in
           Exhibit a.

     (b)   Where GTE has a mated pair of STPs and has CCS/SS7
           interconnection facilities to an IXC within the same LATA, for
           interexchange telecommunications services, GTE shall provide call
           set-up signaling between DTI and the IXC.

     (c)   DTI agrees to provide to GTE such information as deemed
           necessary by GTE for network planning in connection with this
           offering and as may be requested by GTE from time to time.
      
     (d)   DTI must provide the Signaling Point Codes of the IXCs for
           which it is providing call setup via GTE's SS7 signaling network, so
           that GTE screening and translation tables can be updated.

2.5  Technical Specifications.  The technical specifications for the Services
     described above are defined in Bellcore TR-TSV-000905.  GTE will provide
     SS7 via OR-394-SS7 and/or OR-317-SS7 format(s).

2.6  Other Services.  If DTI desires to order SS7-related services other than
     the Service, such services will be governed by separate agreements.

                                     J-2


<PAGE>   155



2.7  Applicable Traffic.  The Service applies to the traffic of DTI and its
     subtending LECs only.  DTI must provide GTE with thirty (30) calendar
     days' written notice and a letter of agency before the traffic of any
     party other than DTI or its subtending LECs may be transmitted through
     DTI's facilities on to GTE's SS7 network.

                                 ARTICLE 3.
                           MANNER OF PROVISIONING

3.1  Link Facilities.  The link facilities to GTE STPs in the same LATA can be
     either:

     (a)   "a" Link sets from DTI's SP or SSP.  A minimum of two (2)
           links is required, one (1) from the SP or SSP to each STP; or,

     (b)   "B" Link sets from DTI's STPs that are connected to GTE's
           mated pairs of STPs.  A minimum of four (4) links is required
           between the two (2) pairs of STPs.

3.2  Port Termination.  An STP port termination is required for each 56 kbps
     access link utilized for the Service.  STP locations are set forth in the
     National Exchange Carrier Association, Inc. (NECA) Tariff, F.C.C. No. 4.

3.3  Signaling Point Codes.  GTE shall install all applicable Signaling Point
     codes for each signaling link at each of GTE's interconnecting STPs.

3.4  Protocol.  GTE shall provision the Service in accordance with ANSI T1.226
     Telecommunications - Operations, Administration, Maintenance, and
     Provisioning (OAM&P) -Management of functions for Signaling System No. 7
     (SS7) Network Interconnections (ATIS) with the exception of references to
     OMAP protocol elements.  The Service cannot be established until
     Compatibility Testing has been successfully completed between DTI and GTE.

3.5  56 kbps Channel.  Unless DTI elects to provide such links, GTE shall
     provide two (2) or four (4) 56 kbps circuits as link facilities at rates
     set forth in Article 4 herein.  If approved by GTE, DTI may utilize a 56
     kbps channel of an intraLATA DS1 (1.544 mbps) facility, which is in place
     at the time of ordering, as an "A" Link or a "B" Link, for the STP access
     connection between the SPOI and GTE's STP.  WHEN THIS OPTION IS CHOSEN,
     DTI UNDERSTANDS AND ACCEPTS THAT THE SERVICE PERFORMANCE STANDARDS AS
     OUTLINED IN BELLCORE DOCUMENT TR-TSV-000905 MAY NOT BE MET IN THE
     PROVISION OF THE TOTAL SERVICE.  If such a channel is not utilized, DTI
     must order DS1 (1.544 Mbps) service.

3.6  Multiplexing.  Where technically required, GTE shall provide multiplexing
     arrangements to DTI at no charge.

3.7  Diversity.  Where technically feasible and not unreasonably economically
     burdensome, GTE agrees to allow interoffice and intraoffice diversity.

                                 ARTICLE 4.
                              RATES AND CHARGES

4.1  Payment.  DTI agrees to pay to GTE for the Service at the rates and
     charges set forth in Exhibit A attached to this Appendix and made a part
     hereof.

4.2  Period.  Subject to Article 4.3 below, the rates and charges shall remain
     in effect and are firm for a period of twelve (12) months from the
     effective date of this Appendix.  Thereafter, GTE shall give DTI sixty
     (60) calendar days' notice of any price change.  If the new prices are not
     acceptable to DTI, DTI may terminate this Appendix upon thirty (30)
     calendar days' advance written notice without penalties for either Party.


                                     J-3


<PAGE>   156





4.3  Rate Basis.  The rates are based upon rates and charges reflected in
     GTE's approved CCS/SS7 interconnection tariffs.  To the extent that tariff
     rates are adjusted, rates and charges for similar rate elements in this
     Appendix will be adjusted accordingly on the date the new tariff rates
     become effective.  If a state or federal regulatory agency requires, or
     GTE elects, to offer the Service by tariff, the tariff shall supersede
     this Appendix.  If the Service becomes tariffed, DTI has the right to
     terminate this Appendix upon sixty (60) calendar days' advance written
     notice effective on the effective date of such tariff, without penalty to
     either Party.

4.4  Mileage.  Mileage is calculated on the airline distance between the
     locations involved, using the V&H coordinates method, as set forth in the
     National Exchange Carrier Association, Inc. Tariff, F.C.C. No. 4.

4.5  Rates and Charges.  Rates and charges for each component of the Service
     are described as follows:

     (a)   "A" Link connection - Charges for the "a" Link connection to
           GTE's CCS/SS7 network consist of the STP port termination charges.

           (1)   The STP port termination charges are for the
                 termination of a 56 kbps channel at each STP from DTI's SSP or
                 SP.

           (2)   DTI will lease facilities between its SSPs/SPs
                 and GTE's STPs.

     (b)   "B" Link connection - Charges for the "B" Link connection to
           GTE's CCS/SS7 network consist of the STP port termination charges.

           (1)   The STP port termination charges are for the
                 termination of a 56 kbps channel at each STP from DTI's STPs.

           (2)   DTI and GTE shall mutually agree upon the rates
                 for "B" Link interconnections within thirty (30) calendar days
                 of the execution of this Agreement.

     (c)   STP Interconnection nonrecurring charge - STP interconnection
           nonrecurring charge shall apply for each "A" Link and "B" Link
           interconnection to GTE's SS7 network.

4.6  Rearrangement.  Charges for rearrangement of the Service that are not
     specifically addressed will be determined by GTE on an individual case
     basis.

4.7  Applicable Traffic.  The rates apply only to the traffic of DTI and its
     subtending LECs.  Any traffic from any other party will be subject to
     additional charges.

                                   ARTICLE 5.
                              ORDERING THE SERVICE

5.1  Order.  To order the Service, DTI shall submit a completed CCS/SS7 Order
     Form to GTE.  DTI may change its Service order by submitting a new Order
     Form which shall be effective when executed by both Parties.  Service
     shall be implemented for DTI thirty (30) calendar days after the execution
     of this Agreement by both Parties.

5.2  Port Terminations.  GTE shall reserve STP port terminations only upon
     receipt of a fully executed copy of this Agreement and the Order Form
     referred to in this Appendix.  GTE shall reserve ports on a first come,    
     first served basis.  Should DTI fail to use a port within sixty (60)
     Business Days of availability, GTE may reassign the port and, DTI must
     resubmit an Order Form for interconnection.


                                     J-4


<PAGE>   157

                                 ARTICLE 6.
                           RESPONSIBILITIES OF GTE

6.1  Managing the Network.  GTE is responsible for managing the network
     provided by GTE as part of the Service and applying protective controls
     which it can invoke as a result of occurrences including, but not limited
     to, failure or overload of GTE or DTI facilities due to natural disasters,
     mass calling or national security demands.

6.2  Performance Standards.  GTE is responsible for meeting service
     performance standards as outlined in Bellcore TR-TSV-000905 except as
     otherwise provided herein.

6.3  Invoice.  GTE shall include with the monthly invoice such data GTE and
     DTI mutually agree is necessary for DTI to verify the accuracy of the
     billing it receives from GTE for the Service.

                                 ARTICLE 7.
                           RESPONSIBILITIES OF DTI

7.1  Signaling Link.  DTI shall provision the signaling links from its
     premises to the SPOIs in a manner technically compatible to the GTE
     network.

7.2  Privacy Indicator.  DTI shall populate the "privacy indicator" portion of
     the CCS/SS7 initial address message forwarded to GTE's network for call
     processing.

7.3  Accuracy of Information.  DTI shall verify the accuracy of information
     provided by DTI concerning the Service ordered by DTI.

7.4  Forecast.  DTI shall furnish to GTE, at the time the Service is ordered
     and annually thereafter, an updated three year forecast of usage for the
     56 kbps channel and the STP port termination for each STP pair.  The
     forecast shall include total annual volume and busy hour busy month
     volume.  GTE shall utilize the forecast in its own efforts to project
     further facility requirements.

7.5  Changes.  DTI agrees to inform GTE in writing at least thirty (30)
     Business Days in advance of any change in its use of the Service that
     alters by ten percent (10%) or more for any thirty (30) day period the
     volume of signaling transactions to be forwarded to GTE's CCS/SS7 network.
     DTI will provide the reason for the change in volume by individual SS7
     service.

                                 ARTICLE 8.
                            SIGNALING POINT CODES

8.1  Interconnection.  DTI may utilize either the GTE CCS/SS7 network SPC or
     its own SPC for interconnection purposes when interconnecting its SPs or
     SSPs at the "A" Link level.  DTI shall utilize its own SPC when
     interconnecting its STP at the "B" Link level.  DTI agrees to obtain its
     own initial SPC if it has short or long range plans to provide its own
     STPs.

8.2  SPC.  When the SPC is utilized, GTE shall be responsible for DTI code
     assignment.  When DTI obtains its own SPC, DTI shall be responsible for
     code assignments and shall be responsible for notifying GTE and other
     CCS/SS7 network providers of such assignments.

8.3  SPC Change.  Due to the complexities and potential DTI signaling network
     downtime required for changing working SPCs, DTI agrees to give GTE a
     written notice of an SPC change as soon as possible but no later than
     thirty (30) Business Days prior to the effective date of the SPC change.

                                     J-5


<PAGE>   158
                                 ARTICLE 9.
                               MONTHLY BILLING

Billing statements shall be rendered monthly by GTE to DTI.  The monthly charge
shall be the total of all monthly rate element charges associated with the
Service.  Payment to GTE for bills rendered to DTI shall be due thirty (30)
calendar days after receipt of the invoice and DTI agrees to pay all billed
amounts.  Beginning the day after the due date of the bill, interest charges of
twelve per cent (12%) per annum or the maximum allowed by law, whichever is
less, shall be added to DTI's bill.  Payments shall be applied to the oldest
outstanding amounts first.

                                 ARTICLE 10.
                        LIABILITY AND INDEMNIFICATION

10.1     Release from Liability.  Each Party releases the other from any 
         liability for loss or damage arising out of errors, interruptions,
         defects, failures, delays, or malfunctions of the Service, including
         any and all associated equipment and data processing systems, not
         caused by gross negligence or willful misconduct.  Any losses or
         damages for which either Party is held liable under this Agreement
         shall in no event exceed the amount of the charges for the Service
         during the period beginning at the time notice of the error,
         interruption, defect, failure, or malfunction is received, to the time
         Service is restored.

10.2     Limitation of Liability.  IN ADDITION TO THE LIMITATION OF LIABILITY 
         SET FORTH AT SECTION 24.4 OF ARTICLE III OF THE AGREEMENT, NEITHER
         PARTY SHALL BE LIABLE FOR ANY LOSS OF REVENUE OR PROFIT OR FOR ANY
         LOSS OR DAMAGE ARISING OUT OF THIS AGREEMENT OR OUT OF THE USE OF THE
         CCS OR ANY OF THE SERVICES PROVIDED UNDER THIS AGREEMENT THAT IS
         SUFFERED BY THE OTHER PARTY, WHETHER ARISING IN CONTRACT, TORT
         (INCLUDING WITHOUT LIMITATION NEGLIGENCE OR STRICT LIABILITY) OR
         OTHERWISE AND WHETHER OR NOT INFORMED OF THE POSSIBILITY OF SUCH
         DAMAGES IN ADVANCE.  NEITHER PARTY SHALL BE LIABLE FOR ANY SPECIAL,
         INCIDENTAL, OR CONSEQUENTIAL DAMAGES.

10.3     Third Parties.  Each Party agrees to release, defend, indemnify, and 
         hold harmless the other Party from and against any and all losses,
         damages, or other liability, including reasonable attorneys' fees,
         that it may incur as a result of claims, demands, wrongful death
         actions, or other suits brought by third parties, arising out
         of the use of the Service and resulting from the gross negligence or
         willful misconduct by the indemnifying Party, its employees, agents,
         or contractors in the performance of this Agreement.  In addition, to
         the extent that the Parties' interests do not conflict, DTI shall
         defend GTE against all end users' claims just as if DTI had provided
         such service to its end users with its own employees.  In any event,
         DTI shall assert its tariff limitation of liability for the benefit of
         both GTE and DTI.

10.4     Infringement.  Each Party agrees to release, defend, indemnify, and 
         hold harmless the other Party from and against any claim, demands or
         suit that asserts any infringement or invasion of privacy or
         confidentiality of any person(s), caused or claimed to be caused,
         directly or indirectly, by the indemnifying Party's employees or
         equipment associated with provision of the Service.  This includes,
         but is not limited to, suits arising from disclosure of any
         customer-specific information associated with either the originating
         or terminating numbers used to provision the Service.

10.5     No Warranties.  IN ADDITION TO THE DISCLAIMER SET FORTH AT SECTION 24.3
         OF ARTICLE III OF THE AGREEMENT, NEITHER GTE NOR DTI MAKES ANY
         REPRESENTATIONS OR WARRANTIES TO THE OTHER OR TO ANY THIRD PARTY       
         CONCERNING THE SPECIFIC QUALITY OF ANY SERVICES PROVIDED UNDER OR IN
         CONNECTION WITH THIS APPENDIX, THAT THE SERVICES PROVIDED UNDER THIS
         APPENDIX WILL BE ERROR FREE OR THAT THE FACILITIES WILL OPERATE
         WITHOUT 
                                     J-6


<PAGE>   159

         INTERRUPTION.  GTE AND DTI DISCLAIM, WITHOUT LIMITATION, ANY WARRANTY
         OR GUARANTEE OF MERCHANTABILITY OR FITNESS FOR a PARTICULAR    
         PURPOSE, ARISING FROM COURSE OF PERFORMANCE, COURSE OF DEALING OR FROM
         USAGES OF TRADE.
                 


                                  ARTICLE 11.

                             RESERVATION OF RIGHTS

11.1     Rights Reserved.  By entering into this Appendix to the Agreement,
         neither Party waives, releases or compromises any rights it may have
         to argue, in any federal or state regulatory proceeding (or in any
         judicial appeal following such a proceeding), in support of, or in
         opposition to  any position, including but not limited to:  (a)
         Accounting for deregulated (or detariffed) data base services; (b)
         removal from regulated accounts of expenses and investment associated
         with deregulated (or detariffed) data base services; and (c) any other
         issue pertinent to regulation or deregulation of costs which were, are
         now, or may in the future be, associated with the provisions of data
         base services.  Each Party expressly reserves all its rights in
         connection with such matters.



                                     J-7


<PAGE>   160







                                  EXHIBIT A

                              RATES AND CHARGES

                           for Interconnection at

                  GTE's              -             ,   STP
                        -------------  ------------  --
** CONTACT AL WOOD RE:  ARKANSAS PRICING (THE FORM AND NUMBERS ARE COPIED FROM
TEXAS)

<TABLE>
<CAPTION>
                                             CONTEL RATES & CHARGES               GTE RATES & CHARGES
                                             ----------------------               -------------------
              Rate Element                   Nonrecurring     Monthly           Nonrecurring    Monthly
- ---------------------------------------------------------------------------------------------------------
<S>                                          <C>              <C>               <C>              <C>
1.   STP Port Termination for an               $  65.00        $226.00           $  65.00          $226.00
     "A" Link Per Port

2.   STP Port Termination for a "B"            $  65.00        $226.00           $  65.00          $226.00
     Link Per Port

3.   56 Kbps Digital Facility                                  $  1.82                             $  1.82
     Dedicated Switched Access
     Transport Per Airline Mile

4.   56 Kbps Dedicated Switched                $ 100.00        $ 99.54           $ 100.00          $ 99.54
     Access Line

5.   1.544 Mbps (DS1) High Capacity                            $  4.65                             $  6.65
     Digital Facility Dedicated
     Switched Access Transport Per
     Airline Mile

6.   1.544 Mbps (DS1) Dedicated                $1500.00        $168.59           $1500.00          $168.09
     Switched Access Line

7.   Facility Charge for "B" Links           Depends negotiated                Dependes negotiated
                                             interconnection agreement         interconnection agreement

8.   ISUP Charge per Interconnection                           $500.00                             $500.00

8.1  For ISUP Service an additional SCP charge shall apply per interconnection.
</TABLE>



                                     J-8


<PAGE>   161


                                  APPENDIX K
                          POLE ATTACHMENT AGREEMENT

1.   Parties.

     This agreement (Agreement) is between GTE MIDWEST INCORPORATED/GTE ARKANSAS
     INCORPORATED, a State of _______ corporation having its  principal office
     at _______ ("GTE"), and DIGITAL TELEPORT, INC.,  a corporation of the State
     of _______, having its principal office at ____________ ("Licensee").

2.   Definitions.

2.1  "GTE's poles" or "GTE pole(s)" means a pole or poles solely owned by GTE,
     jointly owned by GTE and another entity, and space on poles obtained by
     GTE through arrangements with the owner(s) thereof.

2.2  "Telecommunications Services" means the offering of telecommunications
     for a fee directly to the public, or to such classes of users as to be
     effectively available directly to the public, regardless of the facilities
     used.

2.3  "Cable Television Services" means the transmission to subscribers of
     off-the-air pickup of broadcast signals or the transmission, without
     separate charge, of locally originated closed circuit television to the
     subscribers of off-the-air service.

2.4  "Attachments" means the equipment reasonably required by Licensee to
     provide its Telecommunications Services or Cable Television Services that
     is placed on GTE's poles.

2.5  "Make-Ready Work" means all work, including, but not limited to,
     rearrangement, removal, or transfer of existing attachments, placement,
     repair, or replacement of poles, or any other changes required to
     accommodate the Licensee's Attachments on a pole.

2.6  "Hazardous Materials" means (i) any substance, material or waste now or
     hereafter defined or characterized as hazardous, extremely hazardous,
     toxic or dangerous within the meaning of the Comprehensive Environmental
     Response, Compensation and Liability Act of 1980, as amended, or any
     similar law, ordinance, statute, rule or regulation of any governmental
     body or authority, (ii) any substance, material or waste now or hereafter
     classified as a contaminant or pollutant under any law, ordinance,
     statute, rule or regulation of any governmental body or authority or (iii)
     any other substance, material or waste, the manufacture, processing,
     distribution, use, treatment, storage, placement, disposal, removal or
     transportation of which is now or hereafter subject to regulation under
     any law, ordinance, statute, rule or regulation of any governmental body
     or authority.

2.7  "Attachment Fee" means the fee assessed per pole and paid by Licensee to
     place Attachments on GTE's poles.

3.   Purpose.

3.1  Licensee represents to GTE that Licensee has a need to occupy, place and
     maintain Attachments on GTE's poles for the purpose of providing
     Telecommunications Services.

3.2  GTE agrees to permit Licensee to occupy, place and maintain its
     Attachments on such GTE poles as GTE may allow pursuant to the terms of
     this Agreement.

                                     K-1


<PAGE>   162


4.   Grant of License.

     GTE grants to Licensee and Licensee accepts from GTE a non-exclusive
     revocable license to occupy, place and maintain in a designated space on
     specified GTE poles Licensee's Attachments on the terms and conditions     
     set forth herein.  Licensee shall have no further right, title, or other
     interest in connection with GTE's poles.  GTE shall have the right to
     grant, renew or extend privileges to others not parties to this Agreement
     to occupy, place or maintain Attachments on or otherwise use any or all GTE
     poles.  Nothing herein is intended to, nor should it be construed to
     require GTE to construct or modify any facilities not needed for its own
     service requirements.  GTE grants this license in reliance on the
     representation of Licensee that Licensee intends to provide
     Telecommunications Services with the Attachments covered by this Agreement.

5.   Term.

     Subject to the termination provisions contained in this Agreement, the term
     of this Agreement shall be two (2) years from the effective date referenced
     in the first paragraph of this Agreement and shall continue in effect for
     consecutive one (1) year terms until either Party gives the other
     Party at least ninety (90) calendar days written notice of termination,
     which termination shall be effective at the end of the then-current term. 
     In the event notice is given less than ninety (90) calendar days prior to
     the end of the current term, this Agreement shall remain in effect for
     ninety (90) calendar days after such notice is received, provided, that in
     no case shall the term be extended beyond ninety (90) calendar days after
     the end of the current term.

6.   Pole Attachment Requests (PARs).

6.1  Licensee shall submit a written Pole Attachment Request ("PAR") to GTE
     identifying the GTE poles upon which it desires to place Attachments.
     Each PAR shall be in a form specified by GTE and may be revised from time
     to time by GTE.  All PARs submitted to GTE shall be processed on a first
     come, first served basis.  GTE, in its sole judgment, will determine the
     availability of space on the GTE pole(s) specified in the PAR and will     
     provide its response to the PAR within thirty (30) Business Days of its
     submission.  Upon approval of the PAR, GTE shall return one copy thereof to
     Licensee bearing an endorsement acknowledging GTE's authorization.  All
     Attachments placed on GTE's poles pursuant to an approved PAR shall become
     subject to all of the terms and conditions of this Agreement.  Licensee may
     submit subsequent  PARs for approval by GTE as needed.  GTE is under no
     obligation to provide general information respecting the location and
     availability of GTE poles, except as may be necessary to process a PAR.  No
     Attachment shall be placed on any GTE pole identified in a PAR until that
     PAR has been approved by GTE.

6.2  Licensee shall pay GTE a fee for processing a PAR to compensate GTE for
     the general administrative costs as well as the actual engineering costs
     reasonably incurred.  The fee for engineering costs shall be computed by
     multiplying the fully loaded hourly rate for an engineer times the number
     of hours reasonably required by each engineer to inspect the GTE poles
     included in the PAR.  GTE will charge its then current rates for
     administrative and engineering costs, as may be changed from time to time
     by GTE to remain consistent with prevailing costs.

6.3  Upon receiving an approved PAR, Licensee shall have the right, subject to
     the terms of this License, to place and maintain the facilities described
     in the PAR in the space designated on the GTE poles identified therein.

6.4  In the event Make-Ready Work is necessary to accommodate Licensee's
     Attachments, GTE shall notify Licensee of such fact and provide Licensee
     with a good faith estimate of the total cost of such Make-Ready Work
     needed to accommodate Licensee's Attachments.  Within fifteen (15) days
     after receiving such notice from GTE, Licensee shall notify GTE either (1)
     that Licensee shall pay all of the costs actually incurred to perform the
     Make-Ready Work and shall pay the total estimated

                                     K-2


<PAGE>   163



     amount to GTE at least ten (10) days prior to the date the Make-Ready
     Work is to begin or (2) that it desires to cancel its PAR.

6.5  GTE shall not be responsible to Licensee for any loss sustained by
     Licensee by reason of the refusal or failure of any other party with
     attachments on GTE's poles to rearrange or modify its attachments as may
     be required to accommodate Licensee's Facilities.

6.6  Licensee is not authorized and shall have no right to place facilities on
     any GTE pole unless that GTE pole is identified in an approved PAR.

7.   Availability of Information Regarding Space on Poles.

     GTE will provide information regarding the availability of pole space
     within thirty (30) Business Days of a written request by Licensee. Because
     GTE will endeavor to determine available space as quickly as       
     possible, a shorter interval may be experienced for requests of a limited
     scope where physical field verification is not necessary.  In the event the
     thirty (30) Business Day time frame cannot be met, GTE shall so advise
     Licensee and shall seek a mutually satisfactory alternative response date. 
     No representation regarding the availability of space shall be made in the
     absence of a physical field verification.

8.   Authority to Place Attachments.

8.1  Before Licensee places any Attachments on GTE's poles pursuant to an
     approved PAR, Licensee shall submit evidence satisfactory to GTE of its
     authority to erect and maintain the facilities to be placed on GTE's poles
     within the public streets, highways and other thoroughfares or on private
     property.  Licensee shall be solely responsible for obtaining all
     rights-of-way, easements, licenses, authorizations, permits and consents
     from federal, state and municipal authorities or private property owners
     that may be required to place Attachments on GTE's poles.  In the event
     Licensee must obtain any additional easements, permits, approvals,
     licenses and/or authorizations from any governmental authority or private
     individual or entity in order to utilize GTE's poles under an approved
     PAR, GTE shall, upon Licensee's request, provide written confirmation of
     its consent to Licensee's utilization of poles in a particular location in
     accordance with this Agreement, if needed by Licensee to obtain such
     additional approvals or authorizations.  GTE shall also provide maps or
     drawings of its facilities' locations to the extent reasonably required by
     such governmental authority or private individual or entity for purposes
     of considering or granting Licensee's request to it for authority or
     approval.

8.2  GTE shall not unreasonably intervene in or attempt to delay the granting
     of any rights-of-way, easements, licenses, authorizations, permits and
     consents from federal, state or municipal authorities or private property
     owners that may be required for Licensee to place its Attachments on GTE's
     poles.

8.3  If any right-of-way, easement, license, authorization, permit or consent
     obtained by Licensee is subsequently revoked or denied for any reason,
     Licensee's permission to attach to GTE's poles shall terminate immediately
     and Licensee shall promptly remove its Attachments.  Should Licensee fail
     to remove its Attachments within one hundred twenty (120) days of
     receiving notice to do so from GTE, GTE shall have the option to remove
     all such Attachments and store them in a public warehouse or elsewhere at
     the expense of and for the account of Licensee without GTE being deemed
     guilty of trespass or conversion, and without GTE becoming liable for any
     loss or damages to Licensee occasioned thereby.  All costs incurred by GTE
     to remove Licensee's Attachments shall be reimbursed to GTE by Licensee
     upon demand.

8.4  Upon notice from GTE to Licensee that the cessation of the use of any one
     or more of GTE's poles is necessary for reasons of safety or has been
     directed by any federal, state or municipal authority, or private property
     owner, permission to attach to such pole or poles shall terminate
     immediately


                                     K-3


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     and Licensee promptly shall remove its Attachments.  Should Licensee fail
     to remove its Attachments within the time frame provided by the requesting
     or directing party or one hundred twenty (120) days of receiving notice
     to do so from GTE, whichever is less, GTE shall have the option to remove
     all such Attachments and store them in a public warehouse or elsewhere at
     the expense of and for the account of Licensee without GTE being deemed
     guilty of trespass or conversion, and without GTE becoming liable for any
     loss or damages to Licensee occasioned thereby.
     All costs incurred by GTE to remove Licensee's Attachments shall be        
     reimbursed to GTE by Licensee upon demand by GTE.

9.   Placement of Attachments.

9.1  Licensee shall, at its own expense, place and maintain its Attachments on
     GTE's poles in accordance with (I) such requirements and specifications as
     GTE shall from time to time prescribe in writing, (ii) all rules or orders
     now in effect or that hereafter may be issued by any regulatory agency or
     other authority having jurisdiction, and (iii) all currently applicable
     requirements and specifications of the National Electrical Safety Code,
     and the applicable rules and regulations of the Occupational Safety and
     Health Act.  Licensee agrees to comply, at its sole risk and expense, with
     all specifications included in Exhibits ___ through ___ hereto, as may be 
     revised from time to time by GTE.

9.2  Licensee's Facilities shall be tagged at maximum intervals of 300 feet so
     as to identify Licensee as the owner of the Facilities.  The tags shall be
     of sufficient size and lettering so as to be easily read from ground
     level.

10.  Failure of Licensee to Place Attachments.

     Once Licensee has obtained an approved PAR, Licensee shall have sixty (60)
     days from the date the PAR is approved to begin the placement of its
     Attachments on the GTE poles covered by the PAR.  If Licensee has not begun
     placing its Attachments within that sixty (60) day period, Licensee        
     shall so advise GTE with a written explanation for the delay.  If Licensee
     fails to advise GTE of its delay, with a written explanation therefor, or
     if Licensee fails to act in good faith by not making a bona fide effort to
     begin placing its Attachments within the sixty (60) days prescribed by this
     Section, the previously approved PAR shall be deemed rescinded by GTE and
     Licensee shall have no further right to place Attachments pursuant to that
     PAR.

11.  Attachment Fees.

11.1 Licensee shall pay to GTE an Attachment Fee, as specified in Exhibit
     hereto, for each GTE pole upon which Licensee obtains authorization to
     place an Attachment.  The Attachment Fee may be increased by GTE from time
     to time as permitted by law upon sixty (60) days written notice to
     Licensee.

11.2 Attachments Fees shall become due and payable on the date a PAR is
     approved by GTE for all GTE poles identified in that PAR on a pro rata
     basis until the end of the then current year and thereafter on an annual
     basis within thirty (30) days of the date of a statement from GTE
     specifying the fees to be paid.  Any payment after thirty (30) days shall
     bear interest at the rate of eighteen percent (18%) per annum or the
     maximum rate allowed by law, whichever is less.

11.3 GTE shall maintain an inventory of the total number of GTE poles occupied
     by Licensee based upon the cumulative number of poles specified in all PARs
     approved by GTE.   GTE may, at its option, conduct a physical inventory of
     Licensee's Attachments under this Section.  It shall be Licensee's sole
     responsibility to notify GTE of any and all removals of Attachments from
     GTE's poles.  Except as provided in Section 18 of this Agreement in
     connection with the termination of this Agreement, such notice shall be
     provided to GTE at least thirty (30) days prior to the removal of the
     Attachments.  Each Notice of Removal shall be in a form specified by GTE
     and may be revised 


                                     K-4


<PAGE>   165


     from time to time at GTE's sole discretion.  Licensee shall remain
     liable for Attachment Fees until Licensee's Attachments have been
     physically removed from GTE's poles.

12.  Modifications, Additions or Replacements to Existing Attachments.

12.1 Licensee shall not modify, add to or replace Facilities on any
     pre-existing Attachment without first notifying GTE in writing of the
     intended modification, addition or replacement at least thirty (30) days
     prior to the date the activity is scheduled to begin.  The required
     notification shall include:  (1) the date the activity is scheduled to
     begin, (2) a description of the planned modification, addition or
     replacement, (3) a representation that the modification, addition or
     replacement will not require any space other than the space previously
     designated for Licensee's Attachments, and (4) a representation that the
     modification, addition or replacement will not impair the structural
     integrity of the poles involved.

12.2 Should GTE determine that the modification, addition or replacement
     specified by Licensee in its notice will require more space than that
     allocated to Licensee or will require the reinforcement of, replacement of
     or an addition of support equipment to the poles involved in order to
     accommodate Licensee's modification, addition or replacement, GTE will so
     notify Licensee, whereupon Licensee will be required to submit a PAR in
     compliance with this Agreement in order to obtain authorization for the
     modification, addition or replacement of its Attachments.

12.3 Access to GTE's poles for repairs, modifications, additions, or
     replacements required in emergency situations shall be governed by Section
     22 of this Agreement.

12.4 Should Licensee request GTE to expand capacity or purchase additional
     plant, Licensee agrees to pay all costs.

13.  Rearrangements to Accommodate Other Licensees.

     Licensee acknowledges that at some point in the future it may become
     necessary to rearrange Licensee's Facilities in order to create space to   
     accommodate the facilities of another licensee.  Licensee agrees that in
     such event Licensee will cooperate in good faith with such other licensee
     to come to a mutually agreeable understanding regarding the manner in which
     the rearrangement of Licensee's Facilities will be achieved.

14.  Unauthorized Attachments.

14.1 The parties agree that because it would be impracticable and extremely
     difficult to determine the actual amount of damages resulting from
     Licensee's unauthorized Attachment(s), a charge equal to five (5) times
     the amount of the then current Attachment Fee shall be paid by Licensee to
     GTE for each unauthorized Attachment to a GTE pole.  Such payment shall be
     deemed liquidated damages and not a penalty.  Licensee also shall pay GTE
     an Attachment Fee for each unauthorized Attachment accruing from the date
     the unauthorized Attachment was first placed on the GTE pole.  In the
     event that the date the unauthorized Attachment was first placed on a GTE
     pole cannot be determined, such date shall be deemed the date of the last
     physical inventory made in accordance with this Agreement or, if no
     physical inventory has been conducted, the date the first PAR from
     Licensee was approved in accordance with this Agreement.  Licensee also
     shall pay to GTE all costs incurred by GTE to rearrange any unauthorized
     Attachment(s) of Licensee if such rearrangement is required to safeguard
     GTE's Attachment(s) or to accommodate the Attachment(s) of another party
     whose Attachment(s) would not have required a rearrangement but for the
     presence of Licensee's unauthorized Attachment(s).  Licensee shall also
     pay to GTE all costs incurred by GTE to reinforce, replace or modify any
     GTE pole, which reinforcement, replacement or modification was required as
     a result of the unauthorized Attachment of Licensee.  The Attachment Fee
     referenced in this subsection 14.1 shall be determined in the same manner
     as such fee would have been determined if the attachment had been
     authorized by GTE.


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14.2 For purposes of this section, an unauthorized Attachment shall include,
     but not be limited to:

     14.2.1 An Attachment to a GTE pole which pole is not identified in any
            PAR in accordance with this Agreement;

     14.2.2 An Attachment that occupies more space than that allocated to
            Licensee by GTE;

     14.2.3 An Attachment that is not placed in accordance with the provisions
            of this Agreement or the appropriate PAR issued pursuant to this
            Agreement;

     14.2.4 An addition or modification by Licensee to its pre-existing
            Attachment(s) that impairs the structural integrity of the involved
            GTE pole(s).

     14.2.5 An Attachment that consists of facilities owned or controlled by,
            and for the use of a party other than Licensee.

15.  Surveys and Inspections of Pole Attachments.

15.1 Upon written notice to Licensee, the total number and exact location of
     Licensee's Attachments on GTE's poles may be determined, at GTE's
     discretion, through a survey to be made not more than once per calendar
     year by GTE.  If so requested, Licensee and/or any other entity owning
     or jointly owning the poles with GTE may participate in the survey.  The
     costs incurred by GTE to conduct the survey shall be reimbursed to GTE by
     Licensee upon demand by GTE.  If the Attachments of more than one Licensee
     are surveyed, each such Licensee shall contribute a proportionate share of
     the costs reimbursed to GTE.

15.2 Apart from surveys conducted in accordance with this section, GTE shall
     have the right to inspect any Attachment of Licensee on GTE's poles as
     conditions may warrant upon written notice to Licensee.  Licensee shall,
     upon demand by GTE, reimburse GTE all costs incurred to conduct its
     inspection.  No joint survey or inspection, or lack thereof, by GTE shall
     operate to relieve Licensee of any responsibility, obligation or liability
     assumed under this Agreement.

16.  Notice of Modification or Alteration of Poles by GTE.

16.1 In the event GTE plans to modify or alter any GTE pole(s) upon which
     Licensee has Attachments, GTE shall provide Licensee notice of the
     proposed modification or alteration at least thirty (30) days prior to the
     time the proposed modification or alteration is scheduled to take place.
     Should Licensee decide to modify or alter its Attachments on the GTE poles
     to be modified or altered by GTE, Licensee shall so notify GTE in writing.
     In such event, Licensee shall bear a proportionate share of the total
     costs incurred by GTE to make such poles accessible to Licensee.

16.2 In the event GTE is required by a federal, state, or local authority to
     move, replace or change the location of any GTE pole(s), Licensee shall
     concurrently relocate Licensee's Attachments.  GTE and each Licensee
     required to relocate its Attachments shall bear its own costs for such
     relocation.

17.  Disclaimer of Warranties.

     EXCEPT AS SPECIFICALLY SET FORTH IN THIS AGREEMENT, GTE MAKES NO   
     WARRANTIES, EXPRESS OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, ANY IMPLIED
     WARRANTIES OF MERCHANTABILITY OR FITNESS FOR a PARTICULAR PURPOSE.

18.  Default and Remedies.

18.1 The occurrence of any one of the following shall be deemed a Material
     Default by Licensee under this Agreement:


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<PAGE>   167



     18.1.1 Failure by Licensee to pay any fee or other sum required to be
            paid under the terms of this Agreement and such default continues
            for a period of ten (10) days after written notice thereof to
            Licensee;

     18.1.2 Failure by Licensee to perform or observe any other term,
            condition, covenant, obligation or provision of this Agreement and
            such default continues for a period of thirty (30) days after
            written notice thereof from GTE (provided that if such default
            is not curable within such thirty (30) day period, the period will
            be extended if Licensee commences to cure such default within such
            thirty (30) day period and proceeds diligently thereafter to effect
            such cure);

     18.1.3 The filing of any tax or mechanic's lien against GTE's poles which
            is not bonded or discharged within thirty (30) days of the date
            Licensee receives notice that such lien has been filed;

     18.1.4 Licensee's voluntary or involuntary bankruptcy;

     18.1.5 Licensee's knowing use or maintenance of its Attachments in
            violation of any law or regulation, or in aid of any unlawful act or
            undertaking;

     18.1.6 If any authorization which may be required of the Licensee by any
            governmental or private authority for the placement, operation or
            maintenance of Licensee's Attachments is denied or revoked.

18.2 In the event of a Material Default, GTE, without any further notice to
     the Licensee (except where expressly provided for below or required by
     applicable law) may do any one or more of the following:

     18.2.1 Perform, on behalf and at the expense of Licensee, any obligation
            of Licensee under this Agreement which Licensee has failed to
            perform and of which GTE shall have given Licensee notice, the cost
            of which performance shall be paid by Licensee to GTE upon demand;

     18.2.2 Terminate this Agreement by giving notice of such termination to
            Licensee and remove Licensee's Attachments and store them in a
            public warehouse or elsewhere at the expense of and for the account
            of Licensee without GTE being deemed guilty of trespass or
            conversion, and without GTE becoming liable for any loss or damages
            to Licensee occasioned thereby; or

     18.2.3 Exercise any other legal or equitable right or remedy which GTE
            may have.

18.3 Any costs and expenses incurred by GTE (including, without limitation,
     reasonable attorneys' fees) in enforcing this Agreement shall be repaid to
     GTE by Licensee upon demand.

18.4 Upon termination of this Agreement by GTE because of a material default
     by Licensee, Licensee shall remain liable to GTE for any and all fees,
     other payments and damages which may be due or sustained prior to such
     termination, all reasonable costs, fees and expenses, including, without
     limitation, reasonable attorneys' fees incurred by GTE in pursuit of its
     remedies hereunder, and additional liquidated damages which shall be an
     amount equal to one full year of Pole Attachment fees.

18.5 All rights and remedies of each party set forth in this Agreement shall
     be cumulative and none shall exclude any other right or remedy, now or
     hereafter allowed by or available under any statute, ordinance, rule of
     court, or the common law, either at law or in equity, or both.

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19.  Indemnification.

19.1 Licensee shall compensate GTE for the full actual loss, damage or
     destruction of GTE's property that in any way arises from or is related to
     this Agreement or activities undertaken pursuant to this Agreement
     (including, without limitation, the installation, construction, operation
     or maintenance of Licensee's Attachments).

19.2 Licensee will further indemnify, defend and hold harmless GTE and GTE's
     agents, officers, employees and assigns, from any and all losses, damages,
     costs, expenses (including, without limitation, reasonable attorneys'
     fees), statutory fines or penalties, actions or claims for personal injury
     (including death), damage to property, or other damage or financial loss
     of whatever nature in any way arising out of or connected with this
     Agreement or activities undertaken pursuant to this Agreement (including,
     without limitation, the installation, construction, operation or
     maintenance of Licensee's Attachments), except to the extent caused by the
     gross negligence or willful misconduct on the part of GTE or GTE's agents,
     officers, employees and assigns.  Licensee further indemnifies GTE from
     subsequent taxes and fees that may be levied by municipalities ROWs in
     association with these agreements.  Such fees that are levied would be in
     addition to the attachment/occupancy fees reflected in this Agreement.
     Licensee expressly assumes all liability for actions brought against GTE
     and GTE's agents, officers, employees and assigns, by Licensee's agents,
     officers or employees and Licensee expressly waives any immunity from the
     enforcement of this indemnification provision that might otherwise be
     provided by workers' compensation law or by other state or federal laws.

19.3 Without limiting any of the foregoing, Licensee assumes all risk of, and
     agrees to relieve GTE of any and all liability for, loss or damage (and
     the consequences of loss or damage) to any Attachments placed on GTE's
     poles and any other financial loss sustained by Licensee, whether caused
     by fire, extended coverage perils, or other casualty, except to the extent
     caused by the gross negligence or willful misconduct on the part of GTE or
     GTE's agents, officers, employees and assigns.

19.4 Without limiting the foregoing, Licensee expressly agrees to indemnify,
     defend and hold harmless GTE and GTE's agents, officers, employees and
     assigns from any and all claims asserted by customers of Licensee in any
     way arising out of or in connection with this Agreement or Licensee's
     Attachments, except to the extent caused by the gross negligence or
     willful misconduct on the part of GTE or GTE's agents, officers, employees
     and assigns.

19.5 Notwithstanding anything to the contrary in this Agreement, Licensee
     further shall indemnify and hold harmless GTE, its agents, officers,
     employees and assigns from and against any claims, liabilities, losses,
     damages, fines, penalties and costs (including, without limitation,
     reasonable attorneys' fees) whether foreseen or unforeseen, which the
     indemnified parties suffer or incur because of:  (I) any discharge of
     Hazardous Waste resulting from acts or omissions of Licensee or the
     Licensee's predecessor in interest; (ii) acts or omissions of the Licensee,
     it agents, employees, contractors or representatives in connection with any
     cleanup required by law, or (iii) failure of Licensee to comply with
     Environmental, Safety and Health Laws.

19.6 In no event shall either party be liable to the other party for any
     special, consequential or indirect damages (including, without limitation,
     lost revenues and lost profits) arising out this Agreement or any
     obligation arising hereunder, whether in an action for or arising out of
     breach of contract, tort or otherwise.

19.7 Licensee shall indemnify, protect and hold harmless GTE from and against
     any and all claims for libel and slander, copyright and/or patent
     infringement arising directly or indirectly by reason of installation of
     Licensee's equipment on GTE's poles pursuant to this Agreement.

                                     K-8


<PAGE>   169


20.  Insurance.

     20.1  Licensee shall carry insurance, at its sole cost and expense,
           sufficient to cover its indemnification obligations as set forth in
           Section 19 of this Agreement.  Such insurance shall include, but not
           be limited to, coverage against liability due to personal injury or
           death of persons in the amount of $500,000 as to any one person and
           $1,000,000 as to any one accident; coverage against liability due to
           property damage in the amount of $500,000 as to each accident and
           $500,000 aggregate; and coverage necessary to fully protect both it
           and GTE from all claims under any worker's compensation laws that
           may be applicable.

     20.2  All insurance required of Licensee under this Agreement shall
           remain in force for the entire life of this Agreement.  The company
           or companies issuing such insurance shall be approved by GTE and GTE
           shall be named as an additional insured in each such policy.
           Licensee shall submit to GTE certificates by each insurer to the
           effect that the insurer has insured Licensee for all potential
           liabilities of Licensee under this Agreement, and that it will not
           cancel or change any policy of insurance issued to Licensee except
           upon thirty (30) days notice to GTE.  In the event Licensee's
           insurance coverage is to be canceled by reason of non-payment of
           premiums due, GTE shall have the option of paying any amount due and
           Licensee shall forthwith reimburse GTE the full amount paid by GTE.

     20.3  Licensee shall promptly advise GTE in writing of any and all
           claims for damages, including, but not limited to, damage to
           property or injury to or death of persons, allegedly arising out of
           or in any manner related, directly or indirectly, to the presence or
           use of Licensee's Attachments.

     20.4  Licensee shall furnish bond or satisfactory evidence of contractual
           insurance coverage, the terms of which shall be subject to GTE's
           approval, in the amount of ten thousand dollars ($10,000) to
           guarantee the payment of any sums which may become due to GTE for    
           rentals, inspections or for work performed by GTE for the benefit of
           Licensee under this Agreement, including the removal of Licensee's
           equipment pursuant to any of the provisions hereof.  All bonds must
           specify that GTE be notified thirty (30) days prior to the expiration
           or cancellation of the policy.

21.  Taxes.

     Any state or local excise, sales, or use taxes (excluding any taxes levied
     on income) resulting from the performance of this Agreement shall be borne
     by the Party upon which the obligation for payment is imposed under
     applicable law, even if the obligation to collect and remit such   taxes is
     placed upon the other Party.  The collecting Party shall charge and collect
     from the obligated Party, and the obligated Party agrees to pay to the
     collecting Party, all applicable taxes, except to the extent that the
     obligated Party notifies the collecting Party and provides to the
     collecting Party appropriate documentation as GTE requires that qualifies
     the obligated Party for a full or partial exemption.  Any such taxes shall
     be shown as separate items on applicable billing documents between the
     Parties.  The obligated Party may contest the same in good faith, at its
     own expense, and shall be entitled to the benefit of any refund or
     recovery, provided that such Party shall not permit any lien to exist on
     any asset of the other Party by reason of the contest.  The collecting
     Party shall cooperate in any such contest by the other Party. The other
     Party will indemnify the collecting Party from any sales or use taxes that
     may be subsequently levied on payments by the other Party by the collecting
     Party.

22.  Emergency Restoration Procedures.

     In the event of an emergency, restoration procedures may be affected by    
     the presence of Licensee's Attachments.  While GTE shall not be responsible
     for the repair of Licensee's 


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     Attachments that are damaged (except by mutual written agreement), GTE
     shall nonetheless control  access to its poles if the restoration is to be
     achieved in an orderly fashion.

     22.1  Where GTE and Licensee are involved in emergency
           restorations, access to GTE's poles will be controlled by GTE's
           Maintenance District Manager or his/her on-site representative
           according to the following guidelines:

           22.1.1      Service Disruptions/Outages

                 (a)   In the event of service disruptions and/or outages, 
                       while exercising its right to first access, GTE shall
                       make all reasonable efforts to grant access to as
                       many other entities with Attachments as is reasonably
                       safe.

                 (b)   Where simultaneous access is not possible, access will 
                       be granted by GTE on a first come, first served
                       basis.

           22.1.2      Service Affecting Emergencies

                 (a)   In the event of service affecting emergencies not 
                       resulting in service disruptions or outages, while
                       exercising its right to first access, GTE shall make 
                       all reasonable efforts to grant access to as many        
                       other entities with Attachments as is reasonably safe.

                 (b)   Where GTE is unable to grant simultaneous access to all
                       other entities with Attachments, access will granted
                       according to the level of damage to the Attachments of
                       each entity and the likelihood that a given level of
                       damage will result in service disruption.  Where the
                       likelihood that a service disruption will result is not
                       clearly discernible, access will be on a first come,
                       first served basis.

     22.2  Without limiting any other indemnification or hold harmless
           provisions of this Agreement, Licensee agrees that any decision by
           GTE regarding access to Attachments, or any action or failure to act
           by GTE, under this Section 22 shall not constitute a basis for any
           claim by Licensee against GTE for any damage to Licensee's
           Attachments or disruption of Licensee's services, or any other
           direct or indirect damages of any kind whatsoever incurred by
           Licensee.

23.  Damage Suspected to Licensee's Facilities Only.

     23.1  In the event Licensee receives information that Licensee's
           Attachments are damaged, Licensee shall notify GTE of said damage at
           a number to be provided later by GTE.  This is a 24-hour, 7 days per
           week notification number.  Licensee shall provide GTE all
           information known to it regarding the damage to Licensee's
           Attachments.

     23.2  In the event GTE receives notice that Licensee's Facilities
           are damaged, GTE will notify Licensee of said damage by telephone at
           the Licensee's emergency telephone number.  GTE shall provide
           Licensee all information known to it regarding the damage to
           Licensee's Attachments.

     23.3  After the giving of such notice by either Licensee or GTE,
           Licensee shall be authorized to perform emergency restoration
           maintenance activities in connection with Licensee's Attachments,
           subject to the provisions of this Agreement.

     23.4  Without limiting any other indemnification or hold harmless
           provisions of this Agreement, Licensee agrees that any decision by
           GTE regarding access to Licensee's Attachments, or 

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<PAGE>   171



           any action or failure to act by GTE, appropriately or 
           inappropriately, under this Section shall not be the basis for any
           claim by Licensee against GTE for any damage to Licensee's           
           Attachments or disruption of Licensee's services, or any other direct
           or indirect damages of any kind whatsoever incurred by Licensee and
           Licensee shall indemnify and hold GTE harmless from any such claim.

24.  Abandonment.

     Nothing in this Agreement shall prevent or be construed to prevent GTE from
     abandoning, selling, assigning or otherwise disposing of any poles or other
     GTE property used for Licensee's Attachments; provided, however,   that GTE
     shall condition any such sale, assignment or other disposition subject to
     the rights granted to Licensee pursuant to this Agreement. GTE shall
     promptly notify Licensee of any proposed sale, assignment or other
     disposition of any poles or other GTE property used for Licensee's
     Attachments.

25.  Notices.

     Any written notice to be given to a party to this Agreement shall be in
     writing and given or made by means of telegram, facsimile transmission,    
     certified or registered mail, express mail or other overnight delivery
     service, or hand delivery, proper postage or other charges prepaid, and
     addressed or directed to the respective parties as follows:

           To   Licensee:
                            ----------------------------
                            ----------------------------
                            ----------------------------
           To   GTE:
                            ----------------------------
                            ----------------------------
                            ----------------------------



     Any notice given by personal delivery shall be deemed to have been given on
     the day of actual delivery and, if given by registered or certified        
     mail, return receipt requested, on the date of receipt thereof and, if
     given by facsimile transmission, on the day of transmittal thereof if given
     during the normal business hours of the recipient and on the next business
     day if not given during normal business hours.

26.  Non-Waiver of Terms and Conditions.

     No course of dealing, course of performance or failure to enforce any of   
     term, right, condition or other provision of this Agreement shall
     constitute or be construed as a waiver of any term, right or condition or
     other provision of this Agreement.

27.  Dispute Resolution.

     27.1  Except in the case of (i) a suit, action or proceeding by GTE
           to compel Licensee to comply with its obligations to indemnify GTE
           pursuant to this Agreement or (ii) a suit, action or proceeding to
           compel either party to comply with the dispute resolution
           procedures set forth in this section, the parties agree to use the
           following procedure to resolve any dispute, controversy or claim
           arising out of or relating to this Agreement or its breach.

     27.2  At the written request of a party, each party shall designate
           a knowledgeable, responsible representative to meet and negotiate in
           good faith to resolve any dispute, controversy or claim arising
           under this Agreement.  The parties intend that these negotiations be
           conducted by non-lawyer, business representatives.  The substance of
           the negotiations shall be left to the discretion of the
           representatives.  Upon mutual agreement, the 

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           representatives may utilize other alternative dispute resolution
           procedures such as mediation to assist in the negotiations. 
           Discussions and correspondence between the representatives for
           purposes of these negotiations shall be treated as confidential,
           undertaken for purposes of settlement, shall be exempt from
           discovery and production, and shall not be admissible in the
           arbitration described below or in any subsequent lawsuit without the
           concurrence of all parties.  Documents identified in or provided
           during such negotiations, which are not prepared for purposes of the
           negotiations, shall not be so exempt and may, if otherwise
           admissible, be admitted as evidence in any subsequent proceeding.

      27.3 If a resolution of the dispute, controversy or claim is not
           reached within sixty (60) days of the initial written request, the
           dispute, controversy or claim shall be submitted to binding
           arbitration by a single arbitrator pursuant to the rules of the
           American Arbitration Association (AAA), except as hereinafter
           provided.  Discovery in any proceeding before the AAA shall be
           controlled by the arbitrator and shall be permitted to the extent
           set forth in this section.  Parties may exchange, in any
           combination, up to thirty-five (35) (none of which may contain
           subparts) written interrogatories, demands to produce documents and
           requests for admission.  Each party may also to take the oral
           deposition of one (1) witness.  Additional discovery may be
           permitted upon mutual agreement of the parties.  The arbitration
           hearing shall be commenced within sixty (60) days of the demand for
           arbitration and shall be held in the city where GTE's local offices
           are located.  The arbitrator shall rule on the dispute, controversy
           or claim by issuing a written opinion within thirty (30) days after
           the close of hearings.  The times specified in this section may be
           extended upon mutual agreement of the parties or by the arbitrator
           upon a showing of good cause.  Judgment upon the award rendered by
           the arbitrator may be entered in any court having jurisdiction.

     27.4  Each party shall bear its own costs, including attorneys'
           fees, incurred in connection with any of the foregoing procedures.
           A party seeking discovery shall reimburse the responding party the
           cost of reproducing documents (to include search time and    
           reproduction time costs).  The fees associated with any arbitration,
           including the fees of the arbitrator, shall be divided equally
           between the parties.

28.  Compliance With Laws.

     Notwithstanding anything to the contrary in this Agreement, each party
     shall ensure that any and all activities it undertakes pursuant to this
     Agreement shall comply with all applicable laws, including, without
     limitation, all applicable provisions of (i) workers' compensation laws,   
     (ii) unemployment compensation laws, (iii) the Federal Social Security
     Law, (iv) the Fair Labor Standards Act, and (v) all laws, regulations,
     rules, guidelines, policies, orders, permits and approvals of any
     governmental authority relating to environmental matters and/or
     occupational safety.

29.  Force Majeure.

     Neither party shall have any liability for its delays or its failure in
     performance due to fire, flood, explosion, pest damage, power failures,    
     strikes or labor disputes, acts of God, the Elements, war, civil
     disturbances, acts of civil or military authorities or the public enemy,
     inability to secure raw materials, transportation facilities, fuel or
     energy shortages, or other cause beyond its control.

30.  Assignment.

     30.1  The rights and obligations of Licensee under this Agreement
           shall not be assigned, transferred or sub-licensed, in whole or in
           part, without the prior written consent of GTE.  An assignment,
           transfer or sub-license of this Agreement by Licensee shall not
           relieve Licensee of its obligations under this Agreement.  Any
           assignment attempted without the prior written consent of GTE shall
           be void.

                                    K-12


<PAGE>   173



     30.2  GTE shall have the right to assign this Agreement and to assign its
           rights and delegate its obligations and liabilities under this
           Agreement, either in whole or in part.  GTE shall provide notice
           to Licensee of any assignment which shall state the effective date
           thereof.  Upon the effective date and to the extent of the
           assignment, GTE shall be released and discharged from all
           obligations and liabilities under this Agreement.

     30.3  Neither this Agreement nor any term or provision hereof, nor
           any inclusion by reference shall be construed as being for the
           benefit of any person or entity not a signatory hereto.

     30.4  This Agreement shall be binding upon and inure to the benefit
           of the parties hereto and their respective successors and assigns.

31.  Applicable Law.

     This Agreement, and the rights and obligations contained in it, shall be   
     governed and construed under the laws of the State of _____________ without
     regard to its conflicts of laws provisions.

32.  Subsequent Law.

     The terms and conditions of this Agreement shall be subject to any and all
     applicable laws, rules, regulations, guidelines, orders, or tariffs that
     are currently in force or that may be prescribed by any federal,   state
     or local governmental authority.  The parties agree to modify, in writing,
     the affected term(s) and condition(s) of this Agreement to bring them into
     compliance with such law, rule, regulation, guideline, order, or tariff. 
     Should any term of this Agreement be determined by a court or other entity
     with competent jurisdiction to be unenforceable, all other terms of this
     Agreement shall remain in full force and effect.

33.  Headings.

     All headings contained in this Agreement are for convenience only and are  
     not intended to affect the meaning or interpretation of any part of this
     Agreement.

34.  Entire Agreement.

     The terms and conditions of this Agreement supersede all prior oral or
     written understandings between the parties and constitute the entire       
     agreement between them concerning the subject matter of this Agreement.
     There are no understandings or representations, express or implied, not
     expressly set forth in this Agreement.  This Agreement shall not be
     modified or amended except by a writing signed by the party to be charged.


                                    K-13


<PAGE>   174


IN WITNESS WHEREOF, the parties hereto have executed this Agreement through
their authorized representatives.

For GTE:                                For Licensee:

GTE



- ----------------------------------      -------------------------
(Signature of Authorized Agent)         (Signature of Officer)
(Printed Name of Authorized Agent)      (Printed Name of Officer)
(Title)                                 (Title)
(Date)                                  (Date)


                                        ATTEST:



                                        Corporate Seal (If Applicable)


                                    K-14


<PAGE>   175




                                   EXHIBIT ___

                               ATTACHMENT FEES





                                    K-15


<PAGE>   176





                                 APPENDIX L
                         CONDUIT OCCUPANCY AGREEMENT

1.   Parties.

     This agreement (Agreement) is between GTE MIDWEST INCORPORATED/GTE 
     ARKANSAS INCORPORATED, a State of ________ corporation having its 
     principal office at ________ ("GTE"), and DIGITAL TELEPORT, INC., a        
     corporation of the State of _______, having as principal office at
     ("Licensee").

2.   Definitions.

     2.1   "GTE's conduit(s)" or "GTE conduit(s)" means any reinforced
           passage or opening in, on, under/over or through the ground capable
           of containing communications facilities.

     2.2   "Telecommunications Services" means the offering of
           telecommunications for a fee directly to the public, or to such
           classes of users as to be effectively available directly to the
           public, regardless of the facilities used.

     2.3   "Cable Television Services" means the transmission to
           subscribers of off-the-air pickup of broadcast signals or the
           transmission, without separate charge, of locally originated closed
           circuit television to the subscribers of off-the-air service.

     2.4  "Conduit" or "Duct" means a single enclosed raceway used to
           house Innerduct.

     2.5   "Innerduct," unless otherwise specified or approved by GTE,
           shall mean a single enclosed raceway 1" or 1-1/4" in diameter,
           placed within duct and used for housing communications facilities.

     2.6   "Facilities" means all facilities, including, but not limited
           to, cables, equipment and associated hardware, owned and utilized by
           the Licensee which occupy an innerduct.

     2.7   "Make-Ready Work" means all work, including, but not limited
           to, rearrangement, removal, or transfer of existing facilities,
           placement, repair, or replacement of duct or innerduct, or any other
           changes required to accommodate the Licensee's Facilities in a
           conduit.

     2.8   "Manholes" and "handholes" mean subsurface enclosures which
           personnel may enter and use for the purpose of installing, operating
           and maintaining communications facilities.

     2.9   "Hazardous Materials" means (I) any substance, material or
           waste now or hereafter defined or characterized as hazardous,
           extremely hazardous, toxic or dangerous within the meaning of the
           Comprehensive Environmental Response, Compensation and Liability Act
           of 1980, as amended, or any similar law, ordinance, statute,
           rule or regulation of any governmental body or authority, (ii) any
           substance, material or waste now or hereafter classified as a
           contaminant or pollutant under any law, ordinance, statute, rule or
           regulation of any governmental body or authority or (iii) any other
           substance, material or waste, the manufacture, processing,
           distribution, use, treatment, storage, placement, disposal, removal
           or transportation of which is now or hereafter subject to regulation
           under any law, ordinance, statute, rule or regulation of any
           governmental body or authority.

      2.10 "Occupancy Fee" means the fee paid by Licensee to GTE per
           linear foot for each innerduct occupied by Licensee's Facilities in
           GTE's Conduit(s).


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3.   Purpose.

     Licensee represents to GTE that Licensee has a need to occupy, place and   
     maintain communications facilities within GTE's conduit(s) for the purpose
     of providing Telecommunications Service.  GTE agrees to permit Licensee to
     occupy, place and maintain communications facilities within GTE's
     conduit(s) as GTE may allow pursuant to the terms of this Agreement.

4.   Grant of License.

     GTE grants to Licensee and Licensee accepts from GTE a non-exclusive
     revocable license to occupy, place and maintain in a designated space in
     specified GTE conduits Licensee's Facilities on the terms and conditions
     set forth herein.  Licensee shall have no further right, title, or other
     interest in connection with GTE's conduit(s).  GTE shall have the right    
     to grant, renew or extend privileges to others not parties to this
     Agreement to occupy, place and maintain facilities in or otherwise use any
     or all of GTE's conduit(s).  Nothing herein is intended to, nor should it
     be construed to require GTE to construct or modify any facilities not
     needed for its own service requirements.  GTE grants this license in
     reliance on the representation of Licensee that Licensee intends to
     provide Telecommunications Service with Licensee's Facilities covered by
     this Agreement.

5.   Term.

     Subject to the termination provisions contained in this Agreement, the
     term of this Agreement shall be two (2) years from the effective date
     referenced in the first paragraph of this Agreement and shall continue in
     effect for consecutive one (1) year terms until either Party gives the
     other Party at least ninety (90) calendar days written notice of   
     termination, which termination shall be effective at the end of the
     then-current term.  In the event notice is given less than ninety (90)
     calendar days prior to the end of the current term, this Agreement shall
     remain in effect for ninety (90) calendar days after such notice is
     received, provided, that in no case shall the term be extended beyond
     ninety (90) calendar days after the end of the current term.

6.   Conduit Occupancy Requests.

     6.1   Upon execution of this Agreement, Licensee shall have the
           right to submit a written Conduit Occupancy Request ("COR") to GTE
           specifying the GTE conduits in which it desires to place its
           Facilities.  Each COR shall be in a form specified by GTE, which
           form may be revised from time to time by GTE.  CORs received by GTE
           shall be processed on a first come, first served basis.  GTE will
           determine the availability of space for Licensee's Facilities in the
           GTE conduit(s) specified in the COR within thirty (30) Business Days
           of its submission.  Upon approval of the COR, GTE shall return a
           copy thereof to Licensee bearing an endorsement acknowledging GTE's
           authorization.  All of Licensee's Facilities placed in GTE's
           conduit(s) pursuant to an approved COR shall become subject to all
           of the terms and conditions of this Agreement.  Licensee may submit
           subsequent CORs for approval by GTE as needed.  All of Licensee's
           Facilities shall be placed in innerduct unless otherwise approved by
           GTE.  No facilities of any kind shall be placed in any GTE
           conduit(s) identified in a COR until that COR has been approved by
           GTE.

     6.2   Licensee shall pay GTE a fee for processing a COR to
           compensate GTE for the general administrative costs as well as the
           actual engineering costs reasonably incurred.  The fee for
           engineering costs shall be computed by multiplying the fully loaded
           hourly rate for an engineer times the number of hours reasonably
           required by each engineer to inspect the GTE conduits included in
           the COR.  GTE will charge its then current rates for administrative
           and engineering costs, as may be changed from time to time by GTE to
           remain consistent with prevailing costs.




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     6.3   Upon receiving an approved COR, Licensee shall have the right, 
           subject to the terms of this Agreement, to place and maintain        
           Licensee's Facilities described in the COR in the innerducts of the
           GTE conduit(s) identified therein.

     6.4   In the event Make-Ready Work is necessary to accommodate Licensee's
           Facilities, GTE shall notify Licensee of such fact and provide
           Licensee with an estimate of the total cost of such Make-Ready Work. 
           Within fifteen (15) days after receiving such notice from GTE, 
           Licensee shall notify GTE either (1) that Licensee shall pay all of
           the costs actually incurred to perform the Make-Ready Work   and
           shall pay the total estimated amount to GTE at least ten (10) days
           prior to the date the Make-Ready Work is to begin or (2) that it
           desires to cancel its COR.

     6.5   Nothing herein shall confer any right upon Licensee to place
           power cables or related power equipment in GTE Conduit(s) or
           Manholes.  Licensee shall place equipment of this nature in its own
           pull boxes outside of GTE's Conduit(s) or Manholes.  Cable
           connectors or splicing devices shall not be used by Licensee in
           GTE's Conduit(s) or innerducts.

7.   Availability of Conduit Maps.

     Existing conduit maps will be made available for viewing by Licensee for
     the purpose of pre-order planning at the GTE area engineering offices
     during normal business hours, subject to reasonable advance notification.  
     While a formal written request will not be required in connection with the
     first request by Licensee to view conduit maps, GTE reserves the right to
     refuse any subsequent viewing request or require written justification for
     the request if Licensee has demonstrated that it does not have a good
     faith intention to submit a COR.  If the availability of specific
     point-to-point conduits can be determined at the time of viewing conduit
     maps, maps reflecting such point-to-point conduits may be made available
     for copying.  Licensee shall pay to GTE a fee for making such copies
     available sufficient to cover the general administrative costs incurred. 
     IN MAKING CONDUIT MAPS AVAILABLE, GTE WILL BE MAKING NO EXPRESS OR IMPLIED
     WARRANTY REGARDING THEIR ACCURACY OTHER THAN THAT THEY ARE THE SAME
     CONDUIT MAPS USED BY GTE IN ITS DAY-TO-DAY OPERATIONS.

8.   Availability of Information Regarding Space In Conduits.

     GTE will provide information regarding the availability of conduit space
     within thirty (30) Business Days of a written request by Licensee. Because
     GTE will endeavor to determine available space as quickly as       
     possible, a shorter interval may be experienced for requests of a limited
     scope where physical field verification is not necessary.  In the event
     the thirty (30) Business Day time frame cannot be met, GTE shall so advise
     Licensee and shall seek a mutually satisfactory alternative response date. 
     No representation regarding the availability of space shall be made in the
     absence of a physical field verification.

9.   Authority to Place Licensee's Facilities.

     9.1   Before Licensee places any of Licensee's Facilities in GTE's
           conduit(s) pursuant to an approved COR, Licensee, upon request,
           shall submit sufficient evidence to GTE of its authority to maintain
           the Facilities to be placed in GTE's conduit(s) within the public
           streets, highways and other thoroughfares or on private property.
           Licensee shall be solely responsible for obtaining all licenses,
           authorizations, permits and consents from federal, state and
           municipal authorities or private property owners that may be
           required to place and maintain Licensee's Facilities in GTE's
           conduit(s).

     9.2   GTE shall not attempt to prevent or delay the granting of any
           rights-of-way, easements, licenses, authorizations, permits and
           consents from any federal, state or municipal



                                     L-3


<PAGE>   179




           authorities, or private property owners that may be required by
           Licensee to place Licensee's Facilities in GTE's conduit(s).

     9.3   If any right-of-way, easement, license, authorization, permit
           or consent obtained by Licensee is subsequently revoked or denied
           for any reason, Licensee's permission to occupy GTE's conduit(s) 
           shall terminate immediately and Licensee shall promptly remove
           Licensee's Facilities.  Should Licensee fail to remove Licensee's
           Facilities within thirty (30) days of receiving notice to do so from
           GTE, GTE shall have the  option to remove Licensee's Facilities and
           store them in a public warehouse or elsewhere at the expense of and
           for the account of Licensee without GTE being deemed guilty of 
           trespass or conversion, and without GTE becoming liable for any 
           loss or damages to Licensee occasioned thereby.  All costs incurred
           by GTE to remove Licensee's Facilities shall be reimbursed to GTE 
           by Licensee upon demand.

        
     9.4   Upon notice from GTE to Licensee that the cessation of the
           use of any portion of GTE's conduit(s) has been ordered or directed
           by any federal, state or municipal authority, or private property
           owner, Licensee's permission to occupy such GTE conduit(s) shall
           terminate immediately and Licensee promptly shall remove Licensee's
           Facilities.  Should Licensee fail to remove Licensee's Facilities
           within thirty (30) days of receiving notice to do so from GTE, GTE
           shall have the option to remove Licensee's Facilities and store them
           in a public warehouse or elsewhere at the expense of and for the
           account of Licensee without GTE being deemed guilty of trespass or
           conversion, and without GTE becoming liable for any loss or damages
           to Licensee occasioned thereby.  All costs incurred by GTE to remove
           Licensee's Facilities shall be reimbursed to GTE by Licensee upon
           demand by GTE.

10.  Placement of Licensee's Facilities.

     10.1        Licensee shall, at its sole expense, place and maintain 
                 Licensee's  Facilities in GTE's conduit(s) in accordance with
                 (I) such requirements and specifications as GTE shall from
                 time to time prescribe in writing, (ii) all rules or orders
                 now in effect or that  hereafter may be issued by any
                 regulatory agency or other authority having jurisdiction,
                 and (iii) all currently applicable requirements and
                 specifications of the National Electrical Safety Code, and the
                 applicable rules and regulations of the Occupational Safety
                 And Health Act.  Licensee agrees to comply, at its sole risk
                 and expense, with all specifications included in Exhibits______
                 through_____hereto, as may be revised from time to time by GTE.

     10.2  Licensee's Facilities shall be tagged at each manhole so as
           to identify Licensee as the owner of the Facilities.  The tags shall
           be of sufficient size and lettering so as to be easily read.

11.  Failure of Licensee to Occupy Conduit Space.

     Upon approval of a COR, Licensee shall have sixty (60) days in which to
     begin the placement of Licensee's Facilities in the GTE conduit(s) covered
     by the COR.  If Licensee has not begun placing its Facilities within that
     sixty (60) day period, Licensee shall so advise GTE with a written
     explanation for the delay.  If Licensee fails to advise GTE of its delay,
     with a written explanation therefor, or if Licensee fails to act in good
     faith by not making a bona fide effort to begin placing its Facilities
     within the sixty (60) days prescribed by this Section, the previously
     approved COR shall be deemed rescinded by GTE and Licensee shall have no
     further right to place Licensee's Facilities pursuant to that COR.


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<PAGE>   180


12.  Occupancy Fees.

     12.1  Licensee shall pay to GTE an Occupancy Fee, as specified in
           Exhibit __ hereto, for each linear foot of innerduct occupied
           by Licensee's Facilities in GTE's conduit(s).  If Licensee's
           Facilities occupy more than one innerduct, a separate Occupancy Fee
           shall be paid by Licensee for each innerduct occupied.  The
           Occupancy Fee specified in Exhibit __ hereto is the fee applicable 
           to 1" or 1-1/4" diameter innerduct.  GTE reserves the right to
           charge a higher fee for innerduct of greater diameter.  The  
           Occupancy Fee may be increased by GTE from time to time as permitted
           by law upon sixty (60) days written notice to Licensee.

     12.2  Occupancy Fees shall become due and payable on the date a COR
           is approved by GTE for all GTE innerducts identified in that COR on
           a pro rata basis until the end of the calendar year and thereafter
           on an annual basis within thirty (30) days of the receipt of a
           statement from GTE specifying the fees to be paid.  Any payment
           after thirty (30) days shall bear interest at the rate of eighteen
           percent (18%) per annum or the maximum rate allowed by law,
           whichever is less.

     12.3  GTE shall maintain an inventory of the total linear footage
           of innerduct occupied by Licensee's Facilities in GTE's conduit(s)
           based upon the cumulative linear footage per innerduct from all CORs
           approved by GTE.  GTE may, at its option, conduct a physical
           inventory of Licensee's Facilities for purposes of determining the
           Occupancy Fees to be paid by Licensee under this section.  It shall
           be Licensee's sole responsibility to notify GTE of any and all
           removals of Licensee's Facilities from GTE's conduit(s).  Written
           notice of such removals (unless they are covered by Section 17 of
           this Agreement) shall be provided to GTE at least thirty (30) days
           prior to the removal.  Each Notice of Removal shall be in a form
           specified by GTE.  Licensee shall remain liable for all Occupancy
           Fees until Licensee's Facilities have been physically removed from
           GTE's conduits.

13.  Modifications, Additions or Replacements of Licensee's Facilities.

     13.1  Licensee shall not modify, add to or replace Licensee's Facilities 
           in any GTE conduit(s) without first notifying GTE in writing of the
           intended modification, addition or replacement at least thirty (30)
           days prior to the date the activity is scheduled    to begin.  The
           required notification shall include:  (1) the date the activity is
           scheduled to begin, (2) a description of the planned modification,
           addition or replacement, (3) a representation that the modification,
           addition or replacement will not require any space other than the
           space previously designated for Licensee's Facilities, and (4) a
           representation that the modification, addition or replacement will
           not impair the structural integrity of the GTE conduit(s) involved.

     13.2  Should GTE determine that the modification, addition or
           replacement specified by Licensee in its notice will require more
           space than that allocated to Licensee or will require any
           modification, replacement or reinforcement of the GTE conduit(s)
           involved in order to accommodate Licensee's modification, addition
           or replacement, GTE will so notify Licensee, whereupon Licensee
           shall be required to submit a COR in compliance with this Agreement
           in order to obtain authorization for the modification, addition or
           replacement of Licensee's Facilities.

     13.3  Access to GTE's conduit(s) for repairs, modifications, additions, 
           or replacements required in emergency situations shall be governed 
           by the provisions of Section 21 of this Agreement.


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14.  Unauthorized Occupancy of GTE Conduit.

     14.1  It is agreed that a charge equal to five (5) times the amount
           of the then current Occupancy Fee shall be paid by Licensee to GTE
           for each unauthorized occupancy of GTE's conduit(s) by Licensee.
           Such payment shall be deemed liquidated damages and not a penalty.
           Licensee also shall pay GTE an Occupancy Fee for each unauthorized
           occupancy accruing from the date the unauthorized occupancy first
           began.  In the event that the date the unauthorized occupancy first
           began cannot be determined, such date shall be deemed the date of
           the last physical inventory made in accordance with this Agreement
           or, if no physical inventory has been conducted, the date the first
           COR from Licensee was approved in accordance with this Agreement.
           Licensee also shall pay to GTE all costs incurred by GTE to
           rearrange Licensee's Facilities that are unauthorized if such
           rearrangement is required to safeguard GTE's facilities or to
           accommodate the facilities of another party whose facilities would
           not have required a rearrangement but for the presence of Licensee's
           unauthorized facilities.  Licensee also shall pay to GTE all costs
           incurred by GTE to reinforce, replace or modify any GTE conduit(s),
           which reinforcement, replacement or modification is required as a
           result of the unauthorized occupancy by Licensee.  The Occupancy Fee
           referenced in this subsection 14.1 shall be determined in the same
           manner as such a fee would have been determined if the occupancy had
           been authorized by GTE.

     14.2  For purposes of this section, an unauthorized occupancy shall
           include, but not be limited to:

           14.2.1      The presence of Licensee's Facilities in any GTE conduit
                       which conduit is not identified in any COR approved in
                       accordance with this Agreement;

           14.2.2      The presence of Licensee's Facilities in any GTE conduit
                       that occupies more space than that allocated to Licensee
                       by GTE;

           14.2.3      Licensee's Facilities that are not placed in accordance
                       with the provisions of this Agreement or the appropriate
                       COR issued pursuant to this Agreement;

           14.2.4      An addition or modification by Licensee to its 
                       pre-existing Facilities in any GTE conduit that impairs
                       the structural integrity of that GTE conduit.

           14.2.5      The presence of facilities in GTE's conduit(s) placed by
                       Licensee that are owned or controlled by and for the use
                       of a party other than Licensee.

15.   Modification or Alteration GTE Conduits.

     15.1  In the event GTE plans to modify or alter any GTE conduit(s)
           that house Licensee's Facilities, GTE shall provide Licensee notice
           of the proposed modification or alteration at least fourteen (14)
           days prior to the time the proposed modification or alteration is
           scheduled to take place.  Should Licensee decide to modify or alter
           Licensee's Facilities in the GTE conduit(s) to be modified or
           altered by GTE, Licensee shall so notify GTE in writing.  In such
           event, Licensee shall bear a proportionate share of the total costs
           incurred by GTE to make the GTE conduit(s) accessible.  Licensee's
           proportionate share of the total cost shall be based on the ratio of
           the amount of new space occupied by Licensee to the total amount of
           new space occupied by all of the parties joining in the
           modification.


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<PAGE>   182

     15.2  In the event GTE moves, replaces or changes the location,
           alignment or grade of GTE's conduit(s) ("relocation") for reasons
           beyond GTE's control, Licensee concurrently shall relocate
           Licensee's Facilities.  Licensee shall be solely responsible for the
           costs of the relocation of Licensee's Facilities.

16.  Disclaimer of Warranties.

     EXCEPT AS SPECIFICALLY SET FORTH IN THIS AGREEMENT, GTE MAKES NO   
     WARRANTIES, EXPRESS OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, ANY IMPLIED
     WARRANTIES OF MERCHANTABILITY OR FITNESS FOR a PARTICULAR PURPOSE.

17.  Default and Remedies.

     17.1   The occurrence of any one of the following shall be deemed a
            Material Default by Licensee under this Agreement:

     17.1.1 Failure by Licensee to pay any fee or other sum required to be
            paid under the terms of this Agreement and such default
            continues for a period of five (5) days after written notice
            thereof to Licensee;

     17.1.2 Failure by Licensee to perform or observe any other term,
            condition, covenant, obligation or provision of this Agreement and
            such default continues for a period of thirty (30) days after       
            written notice thereof from GTE (provided that if such default is
            not curable within such thirty (30) day period, the period will be
            extended if Licensee commences to cure such default within such
            thirty (30) day period and proceeds diligently thereafter to effect
            such cure);

     17.1.3 The filing of any tax or mechanic's lien against any GTE
            conduit(s) which is not bonded or discharged within thirty (30) days
            of the date Licensee receives notice that such lien has been filed;

     17.1.4 Licensee's voluntary or involuntary bankruptcy;

     17.1.5  Licensee's knowing use or maintenance of Licensee's Facilities in
            violation of any law or regulation, or in aid of any unlawful act or
            undertaking;

     17.1.6 If any authorization which may be required of the Licensee by any
            governmental or private authority for the placement, operation or
            maintenance of Licensee's Facilities is denied or revoked.
            
     17.2   In the event of a Material Default, GTE, without any further
            notice to the Licensee (except where expressly provided for below or
            required by applicable law) may do any one or more of the following:

            17.2.1     Perform, on behalf and at the expense of Licensee, any
                       obligation of Licensee under this Agreement which
                       Licensee has failed to perform and of which GTE
                       shall have given Licensee notice, the cost of which
                       performance shall be paid by Licensee to GTE upon
                       demand;

            17.2.2     Terminate this Agreement by giving notice of such
                       termination to Licensee and remove Licensee's Facilities
                       and store them in a public warehouse or elsewhere at the
                       expense  of and for the account of Licensee without GTE
                       being deemed guilty of trespass or conversion, and
                       without GTE becoming liable for any loss or damages to
                       Licensee occasioned thereby; or 



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<PAGE>   183


            17.2.3     Exercise any other legal or equitable right to remedy 
                       which GTE may have.

     17.3   Any costs and expenses incurred by GTE (including, without 
            limitation, reasonable attorneys' fees) in enforcing this Agreement 
            shall be paid to GTE by Licensee upon demand.

     17.4   Upon termination of this Agreement by GTE, Licensee shall remain 
            liable to GTE for any and all fees, other payments and damages
            which may be due or sustained prior to such termination, all        
            reasonable costs, fees and expenses, including, without limitation,
            reasonable attorneys' fees incurred by GTE in pursuit of its
            remedies hereunder, and additional liquidated damages which shall
            be an amount equal to one full year of Occupancy Fees.

     17.5   All rights and remedies of GTE set forth in this Agreement
            shall be cumulative and none shall exclude any other right or
            remedy, now or hereafter allowed by or available under any statute, 
            ordinance, rule of court, or the common law, either at law or in
            equity, or both.

18.  Indemnification.

     18.1   Licensee shall compensate GTE for the full actual loss, damage or 
            destruction of GTE's property that in any way arises from or is
            related to this Agreement or activities undertaken pursuant to      
            this Agreement (including, without limitation, the installation,
            construction, operation or maintenance of Licensee's Facilities).

     18.2   Licensee will further indemnify, defend and hold harmless GTE and 
            GTE's agents, officers, employees and assigns, from any and all
            losses, damages, costs, expenses (including, without limitation,
            reasonable attorneys' fees), statutory fines or penalties, actions  
            or claims for personal injury (including death), damage to
            property, or other damage or financial loss of whatever nature in
            any way arising out of or connected with this Agreement or
            activities undertaken pursuant to this Agreement (including,
            without limitation, the installation, construction, operation or
            maintenance of Licensee's Facilities), except to the extent caused
            by the negligence or willful misconduct on the part of GTE or GTE's
            agents, officers, employees and assigns.  Licensee further
            indemnifies GTE from subsequent taxes and fees that may be levied
            by municipalities ROWs in association with these agreements.  Such
            fees that are levied would be in addition to the
            attachment/occupancy fees reflected in this Agreement.  Licensee
            expressly assumes all liability for actions brought against GTE and
            GTE's agents, officers, employees and assigns, by Licensee's
            agents, officers or employees and Licensee expressly waives any
            immunity from the enforcement of this indemnification provision
            that might otherwise be provided by workers' compensation law or by
            other state or federal laws.

     18.3   Without limiting any of the foregoing, Licensee assumes all
            risk of, and agrees to relieve GTE of any and all liability for,
            loss or damage (and the consequences of loss or damage) to any of
            Licensee's Facilities placed in any GTE conduit(s) and any other    
            financial loss sustained by Licensee, whether caused by fire,
            extended coverage perils, or other casualty, except to the extent
            caused by the negligence or willful misconduct on the part of GTE
            or GTE's agents, officers, employees and assigns.

     18.4   Without limiting the foregoing, Licensee expressly agrees to
            indemnify, defend and hold harmless GTE and GTE's agents, officers,
            employees and assigns from any and all claims asserted by customers 
            of Licensee in any way arising out of or in connection with this
            Agreement or Licensee's Attachments, except to the extent caused by
            the negligence or willful misconduct on the part of GTE or GTE's
            agents, officers, employees and assigns.

                                     L-8


<PAGE>   184

     18.5   Notwithstanding anything to the contrary in this Agreement, 
            Licensee further shall indemnify and hold harmless GTE, its agents,
            officers, employees and assigns from and against any claims,
            liabilities, losses, damages, fines, penalties and costs
            (including, without limitation, reasonable attorneys' fees) whether
            foreseen or unforeseen, which the indemnified parties suffer or
            incur because of:  (I) any discharge of Hazardous Waste resulting
            from acts or omissions of Licensee or the Licensee's predecessor in
            interest; (ii) acts or omissions of the Licensee, it agents,
            employees, contractors or representatives in connection with any
            cleanup required by law, or (iii) failure of Licensee to comply
            with Environmental, Safety and Health Laws.

     18.6   In no event shall GTE be liable to Licensee for any special,
            consequential or indirect damages (including, without limitation,
            lost revenues and lost profits) arising out this Agreement or any   
            obligation arising hereunder, whether in an action for or arising
            out of breach of contract, tort or otherwise.

     18.7   Licensee shall indemnify, protect and hold harmless GTE from
            and against any and all claims for libel and slander, copyright
            and/or patent infringement arising directly or indirectly by reason 
            of installation of Licensee's equipment in GTE's Ducts pursuant to
            this Agreement.

19.  Insurance.

     19.1   Licensee shall carry insurance, at its sole cost and expense,
            sufficient to cover its indemnification obligations as set forth in 
            Section 18 of this Agreement.  Such insurance shall include, but
            not be limited to, coverage against liability due to personal
            injury or death of persons in the amount of $500,000 as to any one
            person and $1,000,000 as to any one accident; coverage against
            liability due to property damage in the amount of $500,000 as to
            each accident and $500,000 aggregate; and coverage necessary to
            fully protect both it and GTE from all claims under any worker's
            compensation laws that may be applicable.

     19.2   All insurance required of Licensee under this Agreement shall
            remain in force for the entire life of this Agreement.  The company
            or companies issuing such insurance shall be approved by GTE and
            GTE shall be named as an additional insured in each such policy.
            Licensee shall submit to GTE certificates by each insurer to the
            effect that the insurer has insured Licensee for all potential
            liabilities of Licensee under this Agreement, and that it will not
            cancel or change any policy of insurance issued to Licensee except
            upon thirty (30) days notice to GTE.  In the event Licensee's
            insurance coverage is to be canceled by reason of non-payment of
            premiums due, GTE shall have the option of paying any amount due
            and Licensee shall forthwith reimburse GTE the full amount paid by
            GTE.

     19.3   Licensee shall promptly advise GTE in writing of any and all
            claims for damages, including, but not limited to, damage to
            property or injury to or death of persons, allegedly arising out of 
            or in any manner related, directly or indirectly, to the presence
            or use of Licensee's Facilities.

     19.4   Licensee shall furnish bond or satisfactory evidence of contractual
            insurance coverage, the terms of which shall be subject to GTE's
            approval, in the amount of ten thousand dollars ($10,000)   to
            guarantee the payment of any sums which may become due to GTE for
            rentals, inspections or for work performed by GTE for the benefit
            of Licensee under this Agreement, including the removal of
            Licensee's equipment pursuant to any of the provisions hereof.  All
            bonds must specify that the GTE be notified thirty (30) days prior
            to the expiration or cancellation of the policy.

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<PAGE>   185

20.  Taxes.

     Any state or local excise, sales, or use taxes (excluding any taxes
     levied on income) resulting the performance of this Agreement shall be
     borne by the Party upon which the obligation for payment is imposed under  
     applicable law, even if the obligation to collect and remit such taxes is
     placed upon the other Party.  The collecting Party shall charge and
     collect from the obligated Party, and the obligated Party agrees to pay to
     the collecting Party, all applicable taxes, except to the extent that the
     obligated Party notifies the collecting Party and provides to the
     collecting Party appropriate documentation as GTE requires that qualifies
     the obligated Party for a full or partial exemption.  Any such taxes shall
     be shown as separate items on applicable billing documents between the
     Parties.  The obligated Party may contest the same in good faith, at its
     own expense, and shall be entitled to the benefit of any refund or
     recovery, provided that such Party shall not permit any lien to exist on
     any asset of the other Party by reason of the contest.  The collecting
     Party shall cooperate in any such contest by the other Party.  The other
     Party will indemnify the collecting Party from any sales or use taxes that
     may be subsequently levied on payments by the other Party by the
     collecting Party.

21.  Emergency Restoration Procedures.

     In the event of an emergency, restoration procedures may be affected by
     the presence of Licensee's Facilities in GTE's conduit(s).  While GTE      
     shall not be responsible for the repair of Licensee's Facilities that are
     damaged (except by mutual written agreement), GTE shall nonetheless
     control access to its Conduits if the restoration is to be achieved in an
     orderly fashion.

     21.1   Where GTE and Licensee are involved in emergency restorations, 
            access to GTE's conduit(s) will be controlled by GTE's Maintenance
            District Manager or his/her on-site representative  according to
            the following guidelines:

            21.1.1     Service Disruptions/Outages

                  (a)  In the event of service disruptions
                       and/or outages, while exercising its right to first
                       access, GTE shall make all reasonable efforts to grant
                       access to as many other entities with facilities in
                       GTE's conduit(s) as is reasonably safe.

                  (b)  Where simultaneous access is not
                       possible, access will be granted by GTE on a first come,
                       first served basis.

            21.1.2     Service Affecting Emergencies

                  (a)  In the event of service affecting
                       emergencies not resulting in service disruptions or
                       outages, while exercising its right to first access, GTE
                       shall make all reasonable efforts to grant access to as
                       many other entities with facilities in GTE's conduit(s)
                       as is reasonably safe.

                  (b)  Where GTE is unable to grant
                       simultaneous access to all other entities with
                       facilities in GTE's conduit(s), access will granted
                       according to the level of damage to the facilities of
                       each entity and the likelihood that a given level of
                       damage will result in service disruption.  Where the
                       likelihood that a service disruption will result is not
                       clearly discernible, access will be on a first come,
                       first served basis.

      21.2  Without limiting any other indemnification or hold harmless
            provisions of this Agreement, Licensee agrees that any decision by  
            GTE regarding access to Licensee's Facilities, or any action or
            failure to act by GTE under this Section 21 shall not constitute a
            basis for any 


                                    L-10


<PAGE>   186



            claim by Licensee against GTE for any damage to Licensee's 
            Facilities or disruption of Licensee's services, or any other
            direct or indirect damages of any kind whatsoever incurred by
            Licensee.

22.  Damage Suspected to Licensee's Facilities Only.

     22.1   In the event Licensee receives information that Licensee's
            Facilities are damaged, Licensee shall notify GTE of said damage at
            [--TELEPHONE NUMBER--].  This is a 24-hour, 7 days per week 
            notification number.  Licensee shall provide GTE all information
            known to it regarding the damage to Licensee's Facilities.

     22.2   In the event GTE receives notice that Licensee's Facilities
            are damaged, GTE will notify Licensee of said damage by telephone
            at  the Licensee's emergency telephone number.  GTE shall provide
            Licensee all information known to it regarding the damage to
            Licensee's Facilities.

     22.3   After the giving of such notice by either Licensee or GTE,
            Licensee shall be authorized to perform emergency restoration       
            maintenance activities in connection with Licensee's Facilities,
            subject to the provisions of this Agreement.

     22.4   Without limiting any other indemnification or hold harmless
            provisions of this Agreement, Licensee agrees that any decision by
            GTE regarding access to Licensee's facilities, or any action or     
            failure to act by GTE, appropriately or inappropriately, under this
            Section shall not be the basis for any claim by Licensee against
            GTE for any damage to Licensee's Facilities or disruption of
            Licensee's services, or any other direct or indirect damages of any
            kind whatsoever incurred by Licensee and Licensee shall indemnify
            and hold GTE harmless from any such claim.

23.  Access to GTE's Manholes/Handholes.

     23.1   GTE will allow Licensee to audit manholes/handholes that are
            included in any COR submitted to GTE to confirm usability. 
            Licensee shall give GTE at least fourteen (14) days advance written
            notice of its desire to audit and shall obtain all authorizations
            from appropriate authorities required to open the 
            manholes/handholes. GTE shall have the right to have a GTE employee
            or agent present when its manholes/handholes are being opened. 
            Such GTE employee or agent shall have the authority to suspend
            Licensee's activities in and around GTE's manholes/handholes if, in
            the sole discretion of said employee or agent, any hazardous
            conditions arise or any unsafe practices are being followed by
            Licensee's employees, agents, or contractors.  Licensee agrees to
            reimburse GTE the cost of having GTE's employee or agent present. 
            Such charge shall be GTE's fully loaded labor rates then in effect.

     23.2   For purposes other than to audit usability, GTE's 
            manholes/handholes shall be opened only as permitted by GTE and
            only after Licensee has obtained all necessary authorizations from
            appropriate authorities to open manholes/handholes and conduct work 
            operations therein.  GTE shall have the right to have a GTE
            employee or agent present at any site at which its
            manholes/handholes are being opened.  Such GTE employee or agent    
            shall have the authority to suspend Licensee's work operations in
            and around GTE's manholes/handholes if, in the sole discretion of
            said employee or agent, any hazardous conditions arise or any
            unsafe practices are being followed by Licensee's employees,
            agents, or contractors.  Licensee agrees to reimburse GTE the cost
            of having GTE's employee or agent present. Such charge shall be
            GTE's fully loaded labor rates then in effect. The presence of
            GTE's authorized employee or agent shall not relieve Licensee of
            its responsibility to conduct all of its work operations in and
            around GTE's conduit(s) in a safe and workmanlike manner, in
            accordance with the terms of this Agreement.

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<PAGE>   187


24.  Abandonment.

     Nothing in this Agreement shall prevent or be construed to prevent GTE
     from abandoning, selling, assigning or otherwise disposing of any GTE
     conduit(s) or other GTE property used in connection with Licensee's        
     Facilities; provided, however, that GTE shall condition any such sale,
     assignment or other disposition subject to the rights granted to Licensee
     pursuant to this Agreement.  GTE shall promptly notify Licensee of any
     proposed sale, assignment or other disposition of any GTE conduit(s) or
     other GTE property used in connection with Licensee's Facilities.

25.  Notices.

     Any written notice to be given to a party to this Agreement shall be in
     writing and given or made by means of telegram, facsimile transmission,    
     certified or registered mail, express mail or other overnight delivery
     service, or hand delivery, proper postage or other charges prepaid, and
     addressed or directed to the respective parties as follows:

            To   Licensee:
                            -------------------------------
                            -------------------------------
                            -------------------------------

            To   GTE:
                            -------------------------------
                            -------------------------------
                            -------------------------------

     Any notice given by personal delivery shall be deemed to have been given
     on the day of actual delivery and, if given by registered or certified     
     mail, return receipt requested, on the date of receipt thereof and, if
     given by facsimile transmission, on the day of transmittal thereof if
     given during the normal business hours of the recipient and on the next
     business day if not given during normal business hours.

26.  Non-Waiver of Terms and Conditions.

     No course of dealing, course of performance or failure to enforce any of   
     term, right, condition or other provision of this Agreement shall
     constitute or be construed as a waiver of any term, right or condition or
     other provision of this Agreement.

27.  Dispute Resolution.

     27.1   Except in the case of (i) a suit, action or proceeding by GTE
            to compel Licensee to comply with its obligations to indemnify GTE
            pursuant to this Agreement or (ii) a suit, action or proceeding to  
            compel either party to comply with the dispute resolution
            procedures set forth in this section, the parties agree to use the
            following procedure to resolve any dispute, controversy or claim
            arising out of or relating to this Agreement or its breach.

     27.2   At the written request of a party, each party shall designate
            a knowledgeable, responsible representative to meet and negotiate
            in  good faith to resolve any dispute, controversy or claim arising
            under this Agreement.  The parties intend that these negotiations
            be conducted by non-lawyer, business representatives.  The
            substance of the negotiations shall be left to the discretion of
            the representatives.  Upon mutual agreement, the representatives
            may utilize other alternative dispute resolution procedures such as
            mediation to assist in the negotiations.  Discussions and
            correspondence between the representatives for purposes of these
            negotiations shall be treated as confidential, undertaken for
            purposes of settlement, shall be exempt from discovery and
            production, and shall not be admissible in the arbitration
            described below or in any subsequent lawsuit without the
            concurrence of all parties.  Documents identified in or provided
            during such

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<PAGE>   188


            negotiations, which are not prepared for purposes of the    
            negotiations, shall not be so exempt and may, if otherwise
            admissible, be admitted as evidence in any subsequent proceeding.

     27.3   If a resolution of the dispute, controversy or claim is not
            reached within sixty (60) days of the initial written request, the
            dispute, controversy or claim shall be submitted to binding 
            arbitration by a single arbitrator pursuant to the rules of the
            American Arbitration Association (AAA), except as hereinafter
            provided.  Discovery in any proceeding before the AAA shall be
            controlled by the arbitrator and shall be permitted to the extent
            set forth in this section.  Parties may exchange, in any
            combination, up to thirty-five (35) (none of which may contain
            subparts) written interrogatories, demands to produce documents and
            requests for admission.  Each party may also to take the oral
            deposition of one (1) witness.  Additional discovery may be
            permitted upon mutual agreement of the parties.  The arbitration
            hearing shall be commenced within sixty (60) days of the demand for
            arbitration and shall be held in the city where GTE's local offices
            are located.  The arbitrator shall rule on the dispute, controversy
            or claim by issuing a written opinion within thirty (30) days after
            the close of hearings.  The times specified in this section may be
            extended upon mutual agreement of the parties or by the arbitrator
            upon a showing of good cause.  Judgment upon the award rendered by
            the arbitrator may be entered in any court having jurisdiction.

     27.4   Each party shall bear its own costs, including attorneys'
            fees, incurred in connection with any of the foregoing procedures.  
            A party seeking discovery shall reimburse the responding party
            the cost of reproducing documents (to include search time and
            reproduction time costs).  The fees associated with any
            arbitration, including the fees of the arbitrator, shall be divided
            equally between the parties.

28.  Compliance With Laws.

     Notwithstanding anything to the contrary in this Agreement, Licensee       
     shall ensure that any and all activities it undertakes pursuant to this
     Agreement shall comply with all applicable laws, including, without
     limitation, all applicable provisions of (I) workers' compensation laws,
     (ii) unemployment compensation laws, (iii) the Federal Social Security
     Law, (iv) the Fair Labor Standards Act, and (v) all laws, regulations,
     rules, guidelines, policies, orders, permits and approvals of any
     governmental authority relating to environmental matters and/or
     occupational safety.

29.  Force Majeure.

     Except for payment of the Occupancy Fees and other amounts payable under   
     this Agreement, neither party shall have any liability for its delays or
     its failure in performance due to fire, flood, explosion, pest damage,
     power failures, strikes or labor disputes, acts of God, the Elements, war,
     civil disturbances, acts of civil or military authorities or the public
     enemy, inability to secure raw materials, transportation facilities, fuel
     or energy shortages, or other cause beyond its control.

30.  Assignment.

     30.1   The rights and obligations of Licensee under this Agreement
            shall not be assigned, transferred or sub-licensed, in whole or in
            part, without the prior written consent of GTE.  An assignment,     
            transfer or sub-license of this Agreement by Licensee shall not
            relieve Licensee of its obligations under this Agreement.  Any
            assignment attempted without the prior written consent of GTE shall
            be void.

     30.2   GTE shall have the right to assign this Agreement and to assign its
            rights and delegate its obligations and liabilities under this
            Agreement, either in whole or in part.  GTE shall provide notice to
            Licensee of any assignment which shall state the effective date
            thereof.  

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<PAGE>   189



            Upon the effective date and to the extent of the assignment, GTE
            shall be released and discharged from all obligations and
            liabilities under this Agreement.

     30.3   Neither this Agreement nor any term or provision hereof, nor
            any inclusion by reference shall be construed as being for the      
            benefit of any person or entity not a signatory hereto.

     30.4   This Agreement shall be binding upon and inure to the benefit
            of the parties hereto and their respective successors and assigns.

31.  Applicable Law.

     This Agreement, and the rights and obligations contained in it, shall be
     governed and construed under the laws of the State of _________ without 
     regard to its conflicts of laws provisions.

32.  Subsequent Law.

     The terms and conditions of this Agreement shall be subject to any and
     all applicable laws, rules, regulations or guidelines that subsequently
     may be prescribed by any federal, state or local governmental authority.   
     To the extent required by any such subsequently prescribed law, rule,
     regulation or guideline, the parties agree to modify, in writing, the
     affected term(s) and condition(s) of this Agreement to bring them into
     compliance with such law, rule, regulation or guideline.  Should any term
     of this Agreement be determined by a court or other entity with competent
     jurisdiction to be unenforceable, all other terms of this Agreement shall
     remain in full force and effect.

33.  Headings.

     All headings contained in this Agreement are for convenience only and are  
     not intended to affect the meaning or interpretation of any part of this
     Agreement.

34.  Entire Agreement.

     The terms and conditions of this Agreement supersede all prior oral or
     written understandings between the parties and constitute the entire       
     agreement between them concerning the subject matter of this Agreement.
     There are no understandings or representations, express or implied, not
     expressly set forth in this Agreement.  This Agreement shall not be
     modified or amended except by a writing signed by the party to be charged.

                                    L-14


<PAGE>   190





IN WITNESS WHEREOF, the parties hereto have executed this Agreement through
their authorized representatives.

For GTE:                                            For Licensee:
         
GTE         



- ----------------------------------           -------------------------
(Signature of Authorized Agent)              (Signature of Officer)
(Printed Name of Authorized Agent)           (Printed Name of Officer)
(Title)                                      (Title)
(Date)                                       (Date)


                                             ATTEST:



                                             Corporate Seal (If Applicable)

                                    L-15


<PAGE>   191





                                    EXHIBIT __

                                 OCCUPANCY FEES



                                      L-16


<PAGE>   192




                                 APPENDIX M

                RECIPROCAL COMPENSATION FOR CALL TERMINATION

1.   This document describes the reciprocal compensation arrangements between
     DTI and GTE for Local Tariff, Toll and Switched Access Services.  The
     Parties shall compensate each other for transport and termination of such
     traffic at the rates provided in Appendix D and/or the appropriate
     Parties' Switched Access Tariff.

2.   Compensation for Call Termination

     A.     Reciprocal compensation does not apply in a resale environment.

     B.     The following compensation terms shall apply in all cases where 
            DTI purchases GTE's unbundled Local Switching:

            1.   For local intra-switch calls between lines connected to GTE's
                 switch where DTI has purchased GTE's unbundled Local
                 Switching, the Parties agree to impose no call termination
                 charges on each other.  GTE's Local Switching charge will
                 apply as described below where the call is:

                 (a)   Originated by DTI's customer and completed to a GTE 
                       customer:

                       (1)   (For use of the local switch):  Local Switching 
                             charge at the originating office will apply
                             to DTI.

                 (b)   Originated by DTI's customer and completed to the 
                       customer of a Third Party LEC (not affiliated with
                       DTI) using GTE's unbundled Local Switching:

                       (1)   (For use of the local switch):  Local Switching 
                             charge at the originating office will apply
                             to DTI.

                 (c)   Originated by DTI's customer and completed to another 
                       DTI's customer using GTE's unbundled Local
                       Switching.

                       (1)   (For use of the local switch):  Local Switching 
                             charge at the originating office will apply
                             to DTI.

                 (d)   Originated by a GTE customer and terminated to DTI's 
                       customer using GTE's unbundled Local Switching.

                       (1)   No Local Switching charge will apply.

                 (e)   Originated by the customer of a Third Party LEC (not 
                       affiliated with DTI) using GTE's unbundled Local
                       Switching and terminated to DTI's customers using GTE's
                       unbundled Local Switching.

                       (1)   No Local Switching charge will apply to DTI.

     2.     For Local inter-switch calls where DTI has purchased GTE's
            unbundled Local Switching.

            GTEs charges will apply to DTI described below where the call is:

                                     M-1


<PAGE>   193





                 (a)   Originated from DTI's end-user customer using GTE's 
                       unbundled Local Switching and completed to a GTE
                       customer.

                       (1)   (For use of the local switch):  Local Switching 
                             charge at the originating office.

                       (2)   a mileage-based transport charge will apply when 
                             DTI uses GTE's transport.

                       (3)   (For call termination): Charges for local 
                             interconnection/call termination, when
                             applicable.

                 (b)   Originated from DTI's customer using GTE's unbundled 
                       Local Switching and completed to a Third Party LEC (not
                       affiliated with DTI) customer using GTE's unbundled
                       Local Switching.

                       (1)   (For use of the local switch):  Local Switching 
                             charge at the originating Office.

                       (2)   a mileage-based transport charge will apply when 
                             DTI uses GTE's transport.

                 (c)   Originated from DTI's customer using GTE's unbundled 
                       Local Switching and completed to the interconnected
                       network of a Third Party LEC (not affiliated with DTI).

                       (1)   (For use of the local switch):  Local Switching 
                             charge at the originating office.

                       (2)   a mileage-based transport charge will apply when 
                             DTI uses GTE's transport, and mileage shall be
                             measured between the originating office and the 
                             POI of the Third Party's network.

                 (d)   Originated from DTI's customer using GTE's unbundled 
                       Local Switching and completed to DTI's customer using
                       GTE's unbundled Local Switching.

                       (1)   (For use of the local switch):  Local Switching 
                             charge at the originating office.

                       (2)   a mileage-based transport charge will apply when 
                             DTI uses GTE's transport.

                       (3)   (For use of the local switch):  Local Switching 
                             charge at the terminating office.

                 (d)   Originated by a GTE customer and terminated to DTI's 
                       customer using GTE's unbundled Local
                       Switching.

                       (1)   (For use at local switch):  Local Switching 
                             Charge at the terminating office.

                       (2)   (For call termination): DTI shall charge GTE for 
                             local interconnection/call termination, when
                             applicable.

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<PAGE>   194
                 (f)   Originated by a customer of a third-party LEC (not
                       affiliated with DTI) using GTE's unbundled Local
                       Switching and terminated to DTI's customer using GTE's
                       unbundled Local Switching.

                       (1)  (For use of the local switch):  Local Switching 
                            charge at the terminating office.

                 (g)   Originated by a customer of the interconnected network
                       of a third-party LEC (not affiliated with DTI)
                       and terminated to DTI's customer using GTE's unbundled
                       Local Switching.

                       (1)  (For use of the local switch):  Local Switching 
                            charge at the terminating office.

     3.     For intraLATA toll calls where DTI has purchased GTE's unbundled 
            Local Switching, charges per Unbundled Network Element pricing 
            shall apply as follows:

            a.   Originated by DTI's customer and completed to a GTE customer.

                 1.    (For use of the local switch):  Local Switching charge 
                       plus RIC and CCLC (Residual Interconnection Charge) at
                       the originating office.

                 2.    Shared transport charge between the two offices will 
                       apply when DTI uses GTE's transport.

                 3.    (For call termination):  End Office Switching charge at 
                       the terminating office (Switched Access Rate).

                 4.    RIC and CCLC at the terminating office.

            B.   Originated by DTI's customer and completed to the customer of
                 a third-party LEC (not affiliated with DTI) using GTE's 
                 unbundled Local Switching in a distant end office.

                 1.    (For use of the local switch):  Local Switching charge
                       plus RIC and CCLC at the originating office.

                 2.    will apply when DTI uses GTE's transport.

            C.   Originated by DTI customer and completed to the network of a
                 third-party LEC (not affiliated with DTI) interconnected with
                 GTE's network.

                 1.    (For use of the local switch):  Local Switching
                       charge, plus RIC and CCLC, at the originating office.

                 2.    Common transport charge will apply when DTI uses
                       GTE's transport, and mileage shall be measured between 
                       the originating office and the POI of the Third Party's 
                       network.

                 3.    Tandem Switching, where applicable.

            D.   Originated by DTI's customer and completed by another of
                 DTI's customers being served through GTE's unbundled Local 
                 Switching in a distant office.

                                     M-3


<PAGE>   195

                 1.    (For use of the local switch):  Local Switchingcharge
                       plus RIC and CCLC at the originating office.

                 2.    Shared transport charge between the two offices will
                       apply when DTI uses GTE's transport.
             
                 3.    (For use of the local switch):  Local Switching charge
                       plus RIC and CCLC at the terminating office.

            E.   Originated by a GTE customer and terminated to DTI's customer
                 using GTE's unbundled Local Switching.

                 1.    (For use of the local switch):  Local Switching

                 2.    (For call termination):  DTI will charge GTE Local 
                       Switching at the terminating office (Switched Access 
                       Rate).

                 3.    (For call termination):  DTI will charge GTE NI and CCLC
                       at the terminating office.

            F.   Originated by the customer of a third-party LEC (not
                 affiliated with DTI) using GTE's unbundled Local Switching in
                 a distant end office and terminated to DTI's customer
                 using GTE's unbundled Local Switching.

                 1.    (For use of the local switch):  Local Switching charge 
                       plus RIC and CCLC at the terminating office.

            G.   Originated by a customer of the network of a third-party LEC
                 (not affiliated with DTI) interconnected with GTE's network and
                 terminated to DTI's customer using GTE's unbundled Local 
                 Switching.

                 1.    (For use of the local switch):  Local Switching charge
                       plus RIC and CCLC at the terminating office.

     4.     For intrastate Switched Access calls where DTI's is using GTE's 
            unbundled Local Switching for calls originated from or terminated to
            an IXC for completion:

            a.   For calls originated from DTI's customer to DTI's own IXC 
                 switch (or that of an affiliate) for completion.

                 1.    (For use of the local switch):  Local Switching charge 
                       at the terminating office.

                 2.    Originating RIC and CCLC.

                 3.    GTE will charge DTI's IXC affiliate the following 
                       Switched Access elements on a meet-point basis:

                       (a)   Local Transport;

                       (b)   Tandem Switching.

                 4.    DTI will charge DTI's IXC affiliate the following
                       Switched Access elements on a meet-point basis:

                       (a)   Originating RIC and CCLC;

                                     M-4


<PAGE>   196

                       (b)   Local Switching.

            B.   For calls originating from DTI's customer to an IXC's switch
                 not affiliated with DTI.

                 1.    (For use of the local switch):  DTI's customer to an 
                       IXC's switch not affiliated with DTI.

                 2.    Originating RIC and CCLC.

                 3.    GTE shall charge the non-affiliated IXC for the
                       following originating Switched Access on a meet-point    
                       basis:

                       (a)   Local Transport;

                       (b)   Tandem Switching.

                 4.    DTI will charge the non-affiliated IXC for the following
                       Switched Access elements on a meet-point basis:

                       (a)   Originating RIC and CCLC;

                       (b)   Local Switching.

            C.   For calls terminating to DTI's end-user customer from DTI's
                 own IXC switch (or that of an affiliate) for completion.

                 1.    (For use of the local switch):  Local Switching charge 
                       at the terminating office.

                 2.    Terminating RIC and CCLC.

                 3.    GTE will charge DTI's IXC (affiliate) the following 
                       Switched Access elements on a meet-point basis:

                       (a)   Local Transport;

                       (b)   Tandem Switching.

                 4.    DTI will charge DTI's IXC (affiliate) for the following 
                       Switched Access elements on a meet-point basis:

                       (a)   Terminating RIC and CCLC.

                       (b)   Local Switching.

            D.   For calls terminating to DTI's customer from an IXC switch
                 not affiliated with DTI.

                 1.    (For use of the local switch):  Local Switching charge 
                       at the terminating office.

                 2.    Terminating RIC and CCLC.

                 3.    GTE shall charge the IXC for the following terminating 
                       Switched Access on a meet point basis:

                       (a)   Local Transport;


                                     M-5


<PAGE>   197
                       (b)   Tandem Switching.

                 4.    DTI will charge IXC for the following Switched Access 
                       elements on a meet-point basis:

                       (a)   Terminating RIC and CCLC;

                       (b)   Local Switching.

     5.     For interstate Switched Access calls where DTI is using GTE's 
            unbundled Local Switching for calls originated from or terminated
            to an IXC for completion:

            a.   For calls originated from DTI's customer to DTI's own IXC
                 switch (or that of an affiliate) for completion.

                 1.    (For use of the local switch):  Local Switching charge 
                       at the originating office.

                 2.    Originating Residual Interconnection Charge (RIC) and 
                       CCL.

                 3.    GTE shall charge DTI's IXC affiliate for the following 
                       originating Switched Access on a meet-point basis:

                       (a)   Local Transport;

                       (b)   Tandem Switching.

                 4.    DTI will charge DTI's IXC affiliate the following 
                       Switched Access elements on a meet-point basis:

                       (a)   Originating RIC;

                       (b)   Originating CCLC;

                       (c)   Local Switching.

            B.   For calls originated from DTI's customer to an IXC's switch
                 not affiliated to DTI.

                 1.    (For use of the local switch):  Local Switching charge 
                       at the terminating office.

                 2.    Originating RIC and CCLC.

                 3.    GTE shall charge the IXC for the following originating 
                       Switched Access on a meet-point basis:

                       (a)   Local Transport;

                       (b)   Tandem Switching.

                 4.    DTI will charge IXC the following Switched Access 
                       elements on a meet-point basis:

                       (a)   Originating RIC;

                       (b)   Originating CCLC;

                       (c)   Local Switching.


                                     M-6


<PAGE>   198


            C.   For calls terminating customer for DTI's own IXC switch (or
                 that of an affiliate) for completion.

                 1.    (For use of the local switch):  Local Switching charge 
                       at the terminating office. 

                 2.    Terminating RIC and CCL.

                 3.    GTE will charge DTI's IXC (affiliate) the following 
                       Switched Access elements on a meet-point basis:

                       (a)   Local Transport;

                       (b)   Tandem Switching.

                 4.    DTI will charge DTI's IXC affiliate the following
                       Switched Access elements on a meet-point basis:

                       (a)   Terminating RIC;

                       (b)   Terminating CCLC;

                       (c)   Local Switching.

            D.   For calls terminating to DTI's customer from an IXC switch
                 not affiliated with DTI.

                 1.    (For use of the local switch):  Local Switching charge 
                       at the terminating office.

                 2.    Terminating RIC and CCL.

                 3.    GTE will charge the non-affiliated IXC for the following
                       terminating Switched Access on a meet-point basis:

                       (a)   Local Transport;

                       (b)   Tandem Switching.

                 4.    DTI will charge IXC the following Switched Access 
                       elements on a meet-point basis:

                       (a)   Terminating RIC;

                       (b)   Terminating CCLC;

                       (c)   Local Switching.

                                     M-7


<PAGE>   199







                                APPENDIX 46A


                                  GTE TERMS


                      GTE/DTI OPT-IN NEGOTIATION ISSUES

Pursuant to Section 46 of Article III of this Agreement and subject to all of
the terms and conditions of that Section 46, each of the following rates or
terms may be replaced or supplemented by the correlative rate or term set forth
in the OtherCLEC TERMS listed in Appendix 45B, as and when provided in Section
46 and only until, as long as, and under the conditions prescribed by Section
46.

<TABLE>
<S>           <C>          <C>
ISSUE NUMBER  ISSUE        AGREEMENT REFERENCE
              DESCRIPTION
</TABLE>


                                     N-1


<PAGE>   200



                                APPENDIX 46B


                               OTHERCLEC TERMS


                       GTE/DTI OPT-IN NEGOTIATION ISSUES

Pursuant to Section 46 of Article III of this Agreement and subject to all of
the terms and conditions thereof, and after notice as called for in Section 46,
the following OtherCLEC TERMS referred to in Section 46 will be substituted for
the GTE TERMS which are set out in Appendix 45A as and when Section 46 calls
for them to be substituted.  When the OtherCLEC Agreement is selected pursuant
to the provisions of Section 46, the parties shall modify this Appendix by
replacing the descriptions of issues below with the specific rates and terms
and conditions of the selected OtherCLEC Agreement that describes those precise
issues are attached hereto as Exhibits to this Appendix.

ISSUE NUMBER                  ISSUE                     AGREEMENT REFERENCE
                              DESCRIPTION


                                     O-1

<PAGE>   1

                                                                   EXHIBIT 10.25



                INTERCONNECTION, RESALE AND UNBUNDLING AGREEMENT



                                     BETWEEN



                           GTE SOUTHWEST INCORPORATED;
                           GTE ARKANSAS INCORPORATED;
                            GTE MIDWEST INCORPORATED




                                       AND




                             DIGITAL TELEPORT, INC.



<PAGE>   2




                                TABLE OF CONTENTS
<TABLE>
<CAPTION>
<S>                                                                                                            <C>
ARTICLE I
       SCOPE AND INTENT OF AGREEMENT............................................................................I-1

ARTICLE II
       DEFINITIONS ............................................................................................II-1

1.     General Definitions.....................................................................................II-1
       1.1        "ACCESS SERVICE REQUEST" ....................................................................II-1
       1.2        "ACT" .......................................................................................II-1
       1.3        "AFFILIATE" .................................................................................II-1
       1.4        "AMA" .......................................................................................II-1
       1.5        "APPLICABLE LAW" ............................................................................II-1
       1.6        "AUTOMATIC LOCATION IDENTIFICATION/DATA MANAGEMENT
                  SYSTEM (ALI/DMS)" ...........................................................................II-1
       1.7        "AUTOMATIC NUMBER IDENTIFICATION" OR "ANI" ..................................................II-1
       1.8        "BELLCORE" ..................................................................................II-1
       1.9        "BILL-AND-KEEP ARRANGEMENT" .................................................................II-1
       1.10       "BONA FIDE REQUEST (BFR)" ...................................................................II-2
       1.11       "BUSINESS DAY" ..............................................................................II-2
       1.12       "CENTRAL OFFICE SWITCH" .....................................................................II-2
       1.13       "CENTRALIZED MESSAGE DISTRIBUTION SYSTEM" (CMDS) ............................................II-2
       1.14       "CLLI CODES" ................................................................................II-2
       1.15       "COMMERCIAL MOBILE RADIO SERVICES" (CMRS) ...................................................II-2
       1.16       "COMMISSION" ................................................................................II-2
       1.17       "COMMON CHANNEL SIGNALING" OR "CCS" .........................................................II-2
       1.18       "COMPETITIVE LOCAL EXCHANGE CARRIER" (CLEC) .................................................II-2
       1.19       "COMPLIANCE" ................................................................................II-2
       1.20       "CUSTOMER" ..................................................................................II-2
       1.21       "CUSTOMER USAGE DATA" .......................................................................II-2
       1.22       "DS-1" ......................................................................................II-3
       1.23       "DS-3" ......................................................................................II-3
       1.24       "ELECTRONIC FILE TRANSFER" ..................................................................II-3
       1.25       "EMR"........................................................................................II-3
       1.26       "E-911 SERVICE" .............................................................................II-3
       1.27       "EXCHANGE SERVICE" ..........................................................................II-3
       1.28       "EIS" OR "EXPANDED INTERCONNECTION SERVICE" .................................................II-3
       1.29       "FACILITY" ..................................................................................II-3
       1.30       "FCC" .......................................................................................II-3
       1.31       "GENERATOR" .................................................................................II-3
       1.32       "GTOC" ......................................................................................II-3
       1.33       "GUIDE"......................................................................................II-3
       1.34       "HAZARDOUS CHEMICAL" ........................................................................II-4
       1.35       "HAZARDOUS WASTE" ...........................................................................II-4
       1.36       "IMMINENT DANGER" ...........................................................................II-4
       1.37       "INCUMBENT LOCAL EXCHANGE CARRIER" (ILEC) ...................................................II-4
       1.38       "INTERIM NUMBER PORTABILITY (INP)" ..........................................................II-4
       1.39       "INTERCONNECTION POINT" ("IP") ..............................................................II-4
       1.40       "ISDN USER PART (ISUP)" .....................................................................II-4
       1.41       "IXC" OR "INTEREXCHANGE CARRIER" ............................................................II-4
       1.42       "INTERNETWORK FACILITIES" OR "INTERCONNECTION FACILITY" .....................................II-4
</TABLE>

<PAGE>   3

<TABLE>
<CAPTION>
<S>                                                                                                            <C>
       1.43       "LATA" ......................................................................................II-4
       1.44       "LINE INFORMATION DATA BASE (LIDB)" .........................................................II-4
       1.45       "LINE SIDE" .................................................................................II-4
       1.46       "LOCAL EXCHANGE CARRIER" OR "LEC" ...........................................................II-5
       1.47       "LOCAL EXCHANGE ROUTING GUIDE" OR "LERG" ....................................................II-5
       1.48       "LOCAL NUMBER PORTABILITY (LNP)" ............................................................II-5
       1.49       "LOCAL TRAFFIC" .............................................................................II-5
       1.50       "MDF" OR "MAIN DISTRIBUTION FRAME" ..........................................................II-5
       1.51       "MEET-POINT BILLING" OR "MPB" ...............................................................II-5
       1.52       "MECAB" .....................................................................................II-5
       1 53       "MECOD" .....................................................................................II-5
       1.54       "MID-SPAN FIBER MEET" .......................................................................II-5
       1.55       "NANP" ......................................................................................II-6
       1.56       "NETWORK ELEMENT" ...........................................................................II-6
       1.57       "NID" OR "NETWORK INTERFACE DEVICE" .........................................................II-6
       1.58       "NUMBERING PLAN AREA" OR "NPA" ..............................................................II-6
       1.59       "NXX", "NXX CODE", "CENTRAL OFFICE CODE" OR "CO CODE" .......................................II-6
       1.60       "911 SERVICE" ...............................................................................II-6
       1.61       "OWNER AND OPERATOR" ........................................................................II-6
       1 62       "POI" .......................................................................................II-6
       1.63       "POLE ATTACHMENT" ...........................................................................II-6
       1.64       "PROVIDER" ..................................................................................II-6
       1.65       "PUBLIC SAFETY ANSWERING POINT" OR "PSAP" ...................................................II-6
       1.66       "RATE CENTER" ...............................................................................II-7
       1.67       "RIGHT-OF-WAY" OR "ROW" .....................................................................II-7
       1.68       "ROUTING POINT" .............................................................................II-7
       1.69       "SERVICE CONTROL POINT" OR "SCP" ............................................................II-7
       1.70       "SERVICE SWITCHING POINT" OR "SSP" ..........................................................II-7
       1.71       "SIGNALING POINT" OR "SP" ...................................................................II-7
       1.72       "SIGNALING SYSTEM 7" OR "SS7" ...............................................................II-7
       1.73       "SIGNAL TRANSFER POINT" OR "STP" ............................................................II-7
       1.74       "SUBSIDIARY" ................................................................................II-7
       1.75       "SYNCHRONOUS OPTICAL NETWORK" OR "SONET" ....................................................II-7
       1.76       "SWITCHED ACCESS SERVICE" ...................................................................II-8
       1.77       "TELECOMMUNICATIONS SERVICES" ...............................................................II-8
       1.78       "THIRD PARTY CONTAMINATION" .................................................................II-8
       1.79       "TRUNK SIDE" ................................................................................II-8
       1.80       "UNDEFINED TERMS" ...........................................................................II-8
       1.81       "VERTICAL FEATURES" (INCLUDING "CLASS FEATURES") ............................................II-8
       1.82       "WIRE CENTER" ...............................................................................II-8

ARTICLE III
       GENERAL PROVISIONS......................................................................................III-1

1.     Scope of General Provisions.............................................................................III-1

2.     Term and Termination....................................................................................III-1
       2.1        Term.........................................................................................III-1
       2.2        Post-Termination Arrangements................................................................III-1
       2.3        Termination Upon Default.....................................................................III-1
       2.4        Termination Upon Sale........................................................................III-1
       2.5        Liability upon Termination...................................................................III-1

</TABLE>


<PAGE>   4
<TABLE>
<CAPTION>

<S>    <C>                                                                                                     <C>
3.     Amendments............................................................................................. III-2

4.     Assignment..............................................................................................III-2

5.     Authority...............................................................................................III-2

6.     Responsibility for Payment..............................................................................III-2

7.     Billing and Payment.....................................................................................III-2
       7.1        Dispute......................................................................................III-2
       7.2        Late Payment Charge..........................................................................III-2
       7.3        Due Date.....................................................................................III-2
       7.4        Audits.......................................................................................III-2

8.     Binding Effect..........................................................................................III-3

9.     Capacity Planning and Forecasting.......................................................................III-3

10.    Compliance with Laws and Regulations....................................................................III-3

11.    Confidential Information................................................................................III-3
       11.1       Identification...............................................................................III-3
       11.2       Handling.....................................................................................III-3
       11.3       Exceptions...................................................................................III-4
       11.4       Survival.....................................................................................III-4

12.    Consent    .............................................................................................III-4

13.    Cooperation on Fraud Minimization.......................................................................III-4

14.    Dispute Resolution......................................................................................III-4
       14.1       Alternative to Litigation....................................................................III-4
       14.2       Negotiations.................................................................................III-5
       14.3       Arbitration..................................................................................III-5
       14.4       Expedited Arbitration Procedures.............................................................III-5
       14.5       Costs........................................................................................III-5
       14.6       Continuous Service...........................................................................III-6

15.    Entire Agreement........................................................................................III-6

16.    Expenses................................................................................................III-6

17.    Force Majeure...........................................................................................III-6

18.    Good Faith Performance..................................................................................III-6

19.    Governing Law...........................................................................................III-6

20.    Standard Practices......................................................................................III-6

21.    Headings   .............................................................................................III-6

22.    Independent Contractor Relationship.....................................................................III-6

</TABLE>
<PAGE>   5

<TABLE>
<CAPTION>

<S>    <C>                                                                                                     <C>
23.    Law Enforcement Interface...............................................................................III-7

24.    Liability and Indemnity.................................................................................III-7
       24.1       Indemnification..............................................................................III-7
       24.2       End User and Content-Related Claims..........................................................III-7
       24.3       DISCLAIMER...................................................................................III-8
       24.4       Limitation of Liability......................................................................III-8
       24.5       Intellectual Property........................................................................III-8

25.    Multiple Counterparts...................................................................................III-8

26.    No Offer................................................................................................III-8

27.    No Third Party Beneficiaries............................................................................III-8

28.    Notices.................................................................................................III-8

29.    Protection..............................................................................................III-9
       29.1       Impairment of Service........................................................................III-9
       29.2       Resolution...................................................................................III-9

30.    Publicity...............................................................................................III-9

31.    Regulatory Agency Control...............................................................................III-9

32.    Changes in Legal Requirements...........................................................................III-10

33.    Effective Date..........................................................................................III-10

34.    Regulatory Matters......................................................................................III-10

35.    Rule of Construction....................................................................................III-10

36.    Section References......................................................................................III-10

37.    Service Standards.......................................................................................III-10
       37.1       .............................................................................................III-10
       37.2       .............................................................................................III-10
       37.3       .............................................................................................III-10

38.    Severability............................................................................................III-10

39.    Subcontractors..........................................................................................III-10

40.    Subsequent Law..........................................................................................III-10

41.    Taxes...................................................................................................III-10

42.    Trademarks and Trade Names..............................................................................III-11

43.    Waiver..................................................................................................III-11
</TABLE>
<PAGE>   6

<TABLE>
<CAPTION>

<S>                                                                                                            <C>
44.    Environmental Responsibility............................................................................III-11

45.    TBD Prices..............................................................................................III-13

46.    Amendment of Certain Rates, Terms and Conditions........................................................III-13

ARTICLE IV
       GENERAL RULES GOVERNING RESOLD SERVICES
       AND UNBUNDLED ELEMENTS..................................................................................IV-1

1.     General ................................................................................................IV-1

2.     Liability of GTE........................................................................................IV-1
       2.1        Inapplicability of Tariff Liability..........................................................IV-1
       2.2        DTI Tariffs or Contracts.....................................................................IV-1
       2.3        No Liability for Errors......................................................................IV-1

3.     Unauthorized Changes....................................................................................IV-1
       3.1        Procedures...................................................................................IV-1
       3.2        Option to Restrict Changes Without Evidence of Authorization.................................IV-2

4.     Impact of Payment of Charges on Service.................................................................IV-2

5.     Unlawful Use of Service.................................................................................IV-2

6.     Timing of Messages......................................................................................IV-3

7.     Procedures For Preordering, Ordering, Provisioning, Etc. ...............................................IV-3

8.     Customer Contacts.......................................................................................IV-3

ARTICLE V
       INTERCONNECTION AND TRANSPORT AND TERMINATION OF TRAFFIC................................................V-1

1.     Services Covered by This Article........................................................................V-1
       1.1        Types of Services............................................................................V-1
       1.2        Service Locations for Interconnection Services and Facilities................................V-1
       1.3        Additional Services or Service Locations.....................................................V-1

2.     Billing and Rates.......................................................................................V-1
       2.1        Rates and Charges............................................................................V-1
       2.2        Billing......................................................................................V-1

3.     Transport and Termination of Traffic....................................................................V-1
       3.1        Traffic to be Exchanged......................................................................V-1
       3.2        Compensation For Exchange Of Traffic.........................................................V-2
       3.3        Tandem Switching Traffic.....................................................................V-3
       3.4        Inter-Tandem Switching.......................................................................V-3

4.     Direct Network Interconnection..........................................................................V-3
       4.1        Network Interconnection Architecture.........................................................V-3
       4.2        Compensation.................................................................................V-4
       4.3        Trunking Requirements........................................................................V-5

</TABLE>
<PAGE>   7
<TABLE>
<CAPTION>

<S>                                                                                                            <C>
       4.4        Network Redesigns Initiated by GTE...........................................................V-6
       4.5        Interconnection Calling and Called Scopes for the Access Tandem
                  Interconnection and the End Office Interconnection...........................................V-6

5.     Indirect Network Interconnection........................................................................V-6

6.     Number Resources........................................................................................V-6
       6.1        Number Assignment............................................................................V-6
       6.2        Rate Centers.................................................................................V-6
       6.3        Routing Points...............................................................................V-7
       6.4        Code and Numbers Administration..............................................................V-7
       6.5        Programming Switches.........................................................................V-7

7.     Interim Number Portability (INP)........................................................................V-7

8.     Meet-Point Billing......................................................................................V-7
       8.1        Meet-Point Arrangements......................................................................V-7
       8.2        Compensation.................................................................................V-8

9.     Common Channel Signaling................................................................................V-8
       9.1        Service Description..........................................................................V-8
       9.2        Signaling Parameters.........................................................................V-8
       9.3        Privacy Indicators...........................................................................V-9
       9.4        Connection Through STP.......................................................................V-9
       9.5        Third Party Signaling Providers..............................................................V-9
       9.6        Multi-Frequency Signaling....................................................................V-9

10.    Service Quality and Performance.........................................................................V-9

11.    Network Outages.........................................................................................V-9

ARTICLE VI
       RESALE OF SERVICES......................................................................................VI-1

1.     General.................................................................................................VI-1

2.     Terms and Conditions....................................................................................VI-1
       2.1        Quality and Performance......................................................................VI-1
       2.2        Restrictions on Resale.......................................................................VI-1
       2.3        Restrictions on Discount of Retail Services..................................................VI-1
       2.4        Resale to Other Carriers.....................................................................VI-2

3.     Ordering and Billing....................................................................................VI-2
       3.1        Local Service Request........................................................................VI-2
       3.2        Certificate of Operating Authority...........................................................VI-2
       3.3        Letter of Authorization......................................................................VI-2
       3.4        Directory Assistance Listings................................................................VI-2
       3.5        Nonrecurring Charges.........................................................................VI-2
       3.6        Transfers Between DTI and Another Reseller of GTE Services...................................VI-2
       3.7        Local Calling Detail.........................................................................VI-2
       3.8        Procedures...................................................................................VI-2
       3.9        LIDB.........................................................................................VI-2
       3.10       "OLN"........................................................................................VI-3
</TABLE>

                                      -VI-
<PAGE>   8
<TABLE>
<CAPTION>

<S>                                                                                                            <C>
4.     Maintenance.............................................................................................VI-3
       4.1        Maintenance, Testing and Repair..............................................................VI-3
       4.2        Specifics and Procedures for Maintenance.....................................................VI-3
       5.1        Description of Local Exchange Services Available for Resale..................................VI-3
       5.2        List of Services Available for Resale........................................................VI-3
       5.3        Rates........................................................................................VI-4
       5.4        Grandfathered Services.......................................................................VI-4
       5.5        Access.......................................................................................VI-4
       5.6        Operator Services (OS) and Directory Assistance (DA).........................................VI-4

ARTICLE VII
       UNBUNDLED NETWORK ELEMENTS..............................................................................VII-1

1.     General.................................................................................................VII-1

2.     Unbundled Network Elements..............................................................................VII-1
       2.1        Categories...................................................................................VII-1
       2.2        Prices.......................................................................................VII-1
       2.3        Interconnection to Unbundled Elements........................................................VII-1
       2.4        Service Quality..............................................................................VII-2

3.     Network Interface Device................................................................................VII-2
       3.1        Direct Connection............................................................................VII-2
       3.2        NID to NID Connection........................................................................VII-2
       3.3        Removal of Cable Pairs.......................................................................VII-3
       3.4        Maintenance..................................................................................VII-3

4.     Loop Elements...........................................................................................VII-3
       4.1        Service Description..........................................................................VII-3
       4.2        Categories of Loops..........................................................................VII-3
       4.3        Conditioned Loops............................................................................VII-4
       4.4        Features, Functions, Attributes..............................................................VII-4
       4.5        Digital Loop Carrier.........................................................................VII-4
       4.6        Unbundled Loop Facility Certification........................................................VII-4
       4.7        Unbundled Loop Facility Notification.........................................................VII-5
       4.8        Subloops.....................................................................................VII-5

5.     Port and Local Switching Elements.......................................................................VII-5
       5.1        Port.........................................................................................VII-5
       5.2        Ports Available as Unbundled Network Elements................................................VII-6
       5.3        Port Prices..................................................................................VII-6
       5.4        .............................................................................................VII-6
       Local Switching.........................................................................................VII-6
       5.5        Compliance with Section......................................................................VII-6

6.     Transport Facility......................................................................................VII-6
       6.1        Service Description..........................................................................VII-6
       6.2        Categories/Types.............................................................................VII-7

7.     SS7 Transport and Signaling.............................................................................VII-7
       7.1        .............................................................................................VII-7
</TABLE>
<PAGE>   9
<TABLE>
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8.     LIDB Services...........................................................................................VII-7

9.     Database 800-Type Services..............................................................................VII-7

10.    Data Switching..........................................................................................VII-7
       10.1       Access.......................................................................................VII-7
       10.2       Nondiscrimination............................................................................VII-7
       10.3       Testing, Monitoring, Administration and Maintenance..........................................VII-7

11.    Digital Cross Connect System (DCS)......................................................................VII-7
       11.1       Access.......................................................................................VII-7
       11.2       Optional Characteristics.....................................................................VII-7
       11.3       Alternate Provisioning.......................................................................VII-7
       11.4       Elements.....................................................................................VII-8
       11.5       Capabilities.................................................................................VII-8
       11.6       Protection and Performance...................................................................VII-8
       11.7       Provisioning, Administration and Maintenance.................................................VII-8

12.    Operator Services (OS) and Directory Assistance (DA)....................................................VII-8
       12.1       Customized Routing...........................................................................VII-8

13.    Advanced Intelligent Network Access (AIN)...............................................................VII-9

14.    Nondiscrimination Provision and Support.................................................................VII-9

15.    Provisioning Intervals..................................................................................VII-9

16.    Directory Assistance Listing............................................................................VII-9

ARTICLE VIII
       ADDITIONAL SERVICES AND COORDINATED SERVICE ARRANGEMENTS................................................VIII-1

1.     Bona Fide Request Process...............................................................................VIII-1
       1.1        Intent ......................................................................................VIII-1
       1.2        Process .....................................................................................VIII-1

2.     Transfer of Service Announcements.......................................................................VIII-1

3.     Misdirected Calls.......................................................................................VIII-1
       3.1        .............................................................................................VIII-2
       3.2        .............................................................................................VIII-2

4.     911/E911 Arrangements...................................................................................VIII-2
       4.1        Description of Service.......................................................................VIII-2
       4.2        Transport....................................................................................VIII-2
       4.3        Cooperation and Level of Performance.........................................................VIII-2
       4.4        Basic 911 and E911 General Requirements......................................................VIII-2
       4.5        Compensation.................................................................................VIII-7

5.     Information Services Traffic............................................................................VIII-7
       5.1        Routing......................................................................................VIII-7
       5.2        Billing and Collection and Information Service Provider (ISP) Remuneration...................VIII-7
       5.3        900-976 Call Blocking........................................................................VIII-7
</TABLE>
<PAGE>   10
<TABLE>
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<S>                                                                                                            <C>
       5.4        Miscellaneous ...............................................................................VIII-7

6.     Telephone Relay Service.................................................................................VIII-7

7.     Directory Assistance (DA) and Operator Services (OS)....................................................VIII-8
       7.1        Directory Assistance Calls...................................................................VIII-8
       7.2        Operator Services Calls......................................................................VIII-8

8.     Directory Assistance Listings Information...............................................................VIII-8
       8.1        .............................................................................................VIII-8
       8.2        .............................................................................................VIII-8
       8.3        .............................................................................................VIII-8

9.     Directory Listings and Directory Distribution...........................................................VIII-9

10.    Busy Line Verification and Busy Line Verification Interrupt.............................................VIII-9

11.    SAG ....................................................................................................VIII-9

12.    Dialing Format Changes..................................................................................VIII-9

13.    Operational Support Systems (OSS).......................................................................VIII-9

ARTICLE IX
       COLLOCATION.............................................................................................IX-1

1.     Physical Collocation....................................................................................IX-1
       1.1        Space Planning...............................................................................IX-1
       1.2        Connection to Customer Loops and Ports.......................................................IX-1
       1.3        Connection to Other Collocated Carriers......................................................IX-1
       1.4        Choice of Vendor.............................................................................IX-2
       1.5        Monitoring...................................................................................IX-2
       1.6        Phone Service................................................................................IX-2
       1.7        Intraoffice Diversity........................................................................IX-2
       1.8        DTI Proprietary Information..................................................................IX-2
       1.9        Notification of Modifications................................................................IX-2
       1.10       Drawings.....................................................................................IX-2
       1.11       Construction of Space........................................................................IX-2
       1.12       Connection Equipment.........................................................................IX-3
       1.13       Access to DTI Collocation Space..............................................................IX-3
 
2.     Virtual Collocation.....................................................................................IX-4
       2.1        Existing Virtual Collocation.................................................................IX-4
       2.2        Conversion from Physical to Virtual..........................................................IX-4
       2.3        Vendors......................................................................................IX-5
       2.4        Inspection...................................................................................IX-5

ARTICLE X
       ACCESS TO POLES, DUCTS, CONDUITS AND RIGHTS-OF-WAY .....................................................X-1

APPENDIX A
       GTE MEASURES OF QUALITY (MOQ)...........................................................................A-1

</TABLE>

<PAGE>   11
<TABLE>
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<S>                                                                                                            <C>
APPENDIX B
       SERVICE MATRIX..........................................................................................B-1

APPENDIX C
       INTERCONNECTION, TELECOMMUNICATIONS SERVICES
       AND FACILITIES AGREEMENT................................................................................C-1

APPENDIX D
       RATES AND CHARGES FOR
       TRANSPORT AND TERMINATION OF TRAFFIC....................................................................D-1

APPENDIX E
       RATES AND CHARGES FOR LOCAL NUMBER PORTABILITY USING RCF................................................E-1

APPENDIX F
       SERVICES AVAILABLE FOR RESALE...........................................................................F-1

APPENDIX G
       PRICES FOR UNBUNDLED ELEMENTS...........................................................................G-1

APPENDIX H
       RATES AND CHARGES FOR 911/E911 ARRANGEMENTS.............................................................H-1

APPENDIX I
       SERVICE ORDERING, PROVISIONING, BILLING AND MAINTENANCE.................................................I-1

APPENDIX J
       SS7 SERVICES............................................................................................J-1

APPENDIX K
       POLE ATTACHMENT AGREEMENT...............................................................................K-1

APPENDIX L
       CONDUIT OCCUPANCY AGREEMENT.............................................................................L-1

APPENDIX M
       RECIPROCAL COMPENSATION FOR CALL TERMINATION............................................................M-1

APPENDIX 46A
       GTE TERMS...............................................................................................N-1

APPENDIX 46B
       OTHERCLEC TERMS.........................................................................................O-1

</TABLE>

                                      -X-
<PAGE>   12




This Interconnection, Resale and Unbundling Agreement (the "Agreement"), is
made effective as of______, 199___ , by and between GTE Southwest
Incorporates/GTE Arkansas Incorporated/GTE Midwest Incorporated, with its
address for purposes of this Agreement at 600 Hidden Ridge Drive, Irving, Texas
75038 ("GTE"), and Digital Teleport, Inc., in its capacity as a certified
provider of local dial-tone service ("DTI"), with its address for this
Agreement at 11111 Dorsett Road, St. Louis, Missouri 63043 (GTE and DTI being
referred to collectively as the "Parties" and individually as a "Party"). This
Agreement covers services in the State of Oklahoma only (the "State").

WHEREAS, interconnection between competing Local Exchange Carriers ("LECs") is
necessary and desirable for the mutual exchange and termination of traffic
originating on each LEC's network; and

WHEREAS, the Parties desire to exchange such traffic and related signaling in a
technically and economically efficient manner at defined and mutually agreed
upon interconnection points; and

WHEREAS, the Parties wish to enter into an agreement to interconnect their
respective telecommunications networks on terms that are fair and equitable to
both Parties; and

WHEREAS, Section 251 of the Telecommunications Act of 1996 (the "Act") imposes
specific obligations on LECs with respect to the interconnection of their
networks, resale of their telecommunications services, access to their poles,
ducts, conduits and rights-of-way and, in certain cases, the offering of certain
unbundled network elements and physical collocation of equipment in LEC
premises;

WHEREAS, GTE is entering, under protest, into certain aspects of this Agreement
that incorporate adverse results from the arbitrated agreements approved or
which may be approved by the Commission in this state and is doing so in order
to avoid the expense of arbitration while at the same time preserving its legal
positions, rights and remedies.

NOW, THEREFORE, in consideration of the mutual provisions contained herein and
other good and valuable consideration, the receipt and sufficiency of which are
hereby acknowledged, GTE and DTI hereby covenant and agree as follows:



<PAGE>   13



                                              
                                    ARTICLE I
                          SCOPE AND INTENT OF AGREEMENT

Pursuant to this Agreement, the Parties will extend certain arrangements to one
another within each area in which they both operate within the State for
purposes of interconnection and the exchange of traffic between their respective
end user customers, and reciprocal access to poles, ducts, conduits and
rights-of-way. This Agreement also governs the purchase by DTI of certain
telecommunications services provided by GTE in its franchise areas for resale by
DTI, the purchase by DTI of certain unbundled network elements from GTE, and the
terms and conditions of the collocation of certain equipment of DTI in the
premises of GTE. This Agreement is an integrated package that reflects a
balancing of interests critical to the Parties. This Agreement will be submitted
to the Oklahoma Corporation Commission (the "Commission") for approval. The
Parties agree that their entrance into this Agreement is without prejudice to
and does not waive any positions they may have taken previously, or may take in
the future, in any legislative, regulatory, judicial or other public forum
addressing any matters, including matters related to the same types of
arrangements and/or matters related to GTE's cost recovery covered in this
Agreement. DTI agrees to negotiate reciprocal terms and conditions with GTE
based on this Agreement. GTE's execution of this Agreement is not a concession
or waiver in any manner concerning its position that certain of the rates, terms
and conditions contained herein are unlawful, illegal and improper.

The services and facilities to be provided to DTI by GTE in satisfaction of this
Agreement may be provided pursuant to GTE tariffs and then current practices.
Should such services and facilities be modified by tariff or by Order, including
any modifications resulting from other Commission proceedings, federal court
review or other judicial action, such modifications will be deemed to
automatically supersede any rates and terms and conditions of this Agreement.
GTE will provide notification to DTI before such a tariff becomes effective, and
DTI may provide input on such proposed tariff. The Parties shall cooperate with
one another for the purpose of incorporating required modifications into this
agreement.

                                      I-1

<PAGE>   14



                                   ARTICLE II
                                   DEFINITIONS

1.       General Definitions. Except as otherwise specified herein, the
         following definitions shall apply to all Articles and Appendices
         contained in this Agreement. Additional definitions that are specific
         to the matters covered in a particular Article may appear in that
         Article. To the extent that there may be any conflict between a
         definition set forth in this Article II and any definition in a
         specific Article or Appendix, the definition set forth in the specific
         Article or Appendix shall control with respect to that Article or
         Appendix.

         1.1      "ACCESS SERVICE REQUEST" (ASR) means an industry standard form
                  used by the Parties to add, establish, change or disconnect
                  services or trunks for the purposes of Interconnection.

         1.2      "ACT" means the Telecommunications Act of 1996, Public Law
                  104-104 of the 104th United States Congress effective February
                  8, 1996.

         1.3      "AFFILIATE" of a Party means a person, corporation or other
                  legal entity that, directly or indirectly, owns or controls a
                  Party, or is owned or controlled by, or is under common
                  ownership or control with a Party.

         1.4      "AMA" means the Automated Message Accounting structure
                  inherent in switch technology that initially records
                  telecommunication message information. AMA format is contained
                  in the Automated Message Accounting document, published by
                  Bellcore as GR-1100-CORE which defines the industry standard
                  for message recording.

         1.5      "APPLICABLE LAW" shall mean all laws, statutes, common law,
                  regulations, ordinances, codes, rules, guidelines, orders,
                  permits, and approvals of any Governmental Authority, which
                  apply or relate to the subject matter of this Agreement.

         1.6      "AUTOMATIC LOCATION IDENTIFICATION/DATA MANAGEMENT SYSTEM
                  (ALI/DMS)" means the emergency services (E911/911) database
                  containing customer location information (including name,
                  address, telephone number, and sometimes special information
                  from the local service provider) used to process subscriber
                  access records into Automatic Location Identification (ALI)
                  records. From this database, records are forwarded to GTE's
                  ALI Gateway for downloading by local ALI database systems to
                  be available for retrieval in response to ANI from a 9-1-1
                  call. Also, from this database, GTE will upload to its
                  selective routers the selective router ALI (SR/ALI) which is
                  used to determine to which Public Safety Answering Point
                  ("PSAP") to route the call.

         1.7      "AUTOMATIC NUMBER IDENTIFICATION" OR "ANI" refers to the
                  number transmitted through the network identifying the calling
                  party.

         1.8      "BELLCORE" means an organization owned jointly by the Bell
                  regional holding companies and that may in the future be owned
                  partially or totally by other persons, that conducts research
                  and development projects for its owners, including development
                  of new telecommunications services. Bellcore also provides
                  certain centralized technical and management services for the
                  regional holding companies and also provides generic
                  requirements for the telecommunications industry for products,
                  services and technologies.

         1.9      "BILL-AND-KEEP ARRANGEMENT" means a compensation arrangement
                  whereby the Parties do not render bills to each other for the
                  termination of local traffic specified in this

                                      II-1
<PAGE>   15
                  Agreement and whereby the Parties terminate local exchange
                  traffic originating from end-users served by the networks of
                  the other Party without explicit charging among or between
                  said carriers for such traffic exchange.

         1.10     "BONA FIDE REQUEST (BFR)" process is intended to be used when
                  requesting customized Service Orders for certain services,
                  features, capabilities or functionality defined and agreed
                  upon by the Parties as services to be ordered as Bona Fide
                  Requests.

         1.11     "BUSINESS DAY" shall mean Monday through Friday, except
                  for holidays on which the U.S. mail is not delivered.

         1.12     "CENTRAL OFFICE SWITCH" means a switch used to provide
                  telecommunications services including (I) "End Office
                  Switches" which are Class 5 switches from which end user
                  Exchange Services are directly connected and offered, and (ii)
                  "Tandem Office Switches" which are Class 4 switches which are
                  used to connect and switch trunk circuits between and among
                  central office switches. Central office switches may be
                  employed as combination end office/tandem office switches
                  (combination Class 5/Class 4).

         1.13     "CENTRALIZED MESSAGE DISTRIBUTION SYSTEM" (CMDS) means the
                  billing record and clearing house transport system that the
                  Regional Bell Operating Companies ("RBOCs") and other
                  incumbent LECs use to efficiently exchange out collects and in
                  collects as well as Carrier Access Billing System ("CABS")
                  records.

         1.14     "CLLI CODES" means Common Language Location Identifier Codes.

         1.15     "COMMERCIAL MOBILE RADIO SERVICES" (CMRS) means a radio
                  communication service between mobile stations or receivers and
                  land stations, or by mobile stations communicating among
                  themselves that is provided for profit and that makes
                  interconnected service available to the public or to such
                  classes of eligible users as to be effectively available to a
                  substantial portion of the public.

         1.16     "COMMISSION" means the Oklahoma Corporation Commission.

         1.17     "COMMON CHANNEL SIGNALING" OR "CCS" means a high-speed
                  specialized packet-switched communications network that is
                  separate (out-of-band) from the public packet-switched and
                  message networks. CCS carries addressed signaling messages for
                  individual trunk circuits and/or database-related services
                  between Signaling Points in the CCS network using SS7
                  signaling protocol.

         1.18     "COMPETITIVE LOCAL EXCHANGE CARRIER" (CLEC) means any company
                  or person authorized to provide local exchange services in
                  competition with an ILEC.

         1.19     "COMPLIANCE" means environmental and safety laws and
                  regulations are based upon a federal regulatory framework,
                  with certain responsibilities delegated to the States. An
                  environmental/safety compliance program may include review of
                  applicable laws/regulations, development of written
                  procedures, training of employees and auditing.

         1.20     "CUSTOMER" may mean GTE or DTI depending on the context
                  and which Party is receiving the service from the other Party.

         1.21     "CUSTOMER USAGE DATA" means that the local telecommunications
                  services usage data of a CLEC customer, measured in minutes,
                  sub-minute increments, message units, or otherwise, that is
                  recorded and exchanged by the Parties.


                                      II-2
<PAGE>   16

         1.22     "DS-1" is a digital signal rate of 1.544 Mbps.

         1.23     "DS-3" is a digital signal rate of 44.736 Mbps.

         1.24     "ELECTRONIC FILE TRANSFER" refers to a system or process which
                  utilizes an electronic format and protocol to send/receive
                  data files.

         1.25     "EMR" means the Exchange Message Record which is an industry
                  standard record used to exchange telecommunications message
                  information among CLECs for billable, non-billable, sample,
                  settlement and study data. EMR format is defined in
                  BR-010-200-010 CRIS Exchange Message Record, published by
                  Bellcore and which defines the industry standard for exchange
                  message records.

         1.26     "E-911 SERVICE" is a method of routing 911 calls to a Public
                  Service Answering Point that uses a customer location database
                  to determine the location to which a call should be routed.
                  E-9-1-1 service includes the forwarding of the caller's
                  Automatic Number Identification (ANI) to the PSAP where the
                  ANI is used to retrieve and display the Automatic Location
                  Identification (ALI) on a terminal screen at the answering
                  Attendant's position. It usually includes selective routing.

         1.27     "EXCHANGE SERVICE" refers to all basic access line services,
                  or any other services offered to end users which provide end
                  users with a telephonic connection to, and a unique telephone
                  number address on, the public switched telecommunications
                  network ("PSTN"), and which enable such end users to place or
                  receive calls to all other stations on the PSTN.

         1.28     "EIS" OR "EXPANDED INTERCONNECTION SERVICE" means a service
                  that provides interconnecting carriers with the capability to
                  terminate basic fiber optic transmission facilities, including
                  optical terminating equipment and multiplexers, at GTE's wire
                  centers and access tandems and interconnect those facilities
                  with the facilities of GTE. Microwave is available on a
                  case-by-case basis where feasible.

         1.29     "FACILITY" means all buildings, equipment, structures and
                  other items located on a single site or contiguous or adjacent
                  sites owned or operated by the same persons or person as used
                  in Article III, Section 44.

         1.30     "FCC" means the Federal Communications Commission.

         1.31     "GENERATOR" means under Resource Conservation Recovery Act
                  (RCRA), the person whose act produces a hazardous waste (40
                  CFR 261) or whose act first causes a hazardous waste to become
                  subject to regulation. The generator is legally responsible
                  for the proper management and disposal of hazardous wastes in
                  accordance with regulations.

         1.32     "GTOC" means GTE Telephone Operating Company.

         1.33     "GUIDE" means the GTE Open Market Transition Order/Processing
                  Guide/ALEC Customer Guide, which contains GTE's operating
                  procedures for ordering, provisioning, trouble reporting and
                  repair for resold services and unbundled elements. Except as
                  specifically provided otherwise in this Agreement, service
                  ordering, provisioning, billing and maintenance shall be
                  governed by the "Guide" which may be amended from time to time
                  by GTE as needed.

                                      II-3
<PAGE>   17

         1.34     "HAZARDOUS CHEMICAL" means as defined in the U.S. Occupational
                  Safety and Health (OSHA) hazard communication standard (29 CFR
                  1910.1200), any chemical which is a health hazard or physical
                  hazard.

         1.35     "HAZARDOUS WASTE" means as described in Resource Conservation
                  Recovery Act (RCRA), a solid waste(s) which may cause, or
                  significantly contribute to an increase in mortality or
                  illness or pose a substantial hazard to human health or the
                  environment when improperly treated, stored, transported or
                  disposed of or otherwise managed because of its quantity,
                  concentration or physical or chemical characteristics.

         1.36     "IMMINENT DANGER" means as described in the Occupational
                  Safety and Health Act and expanded for environmental matters,
                  any conditions or practices at a facility which are such that
                  a danger exists which could reasonably be expected to cause
                  death or serious harm or significant damage to the environment
                  or natural resources.

         1.37     "INCUMBENT LOCAL EXCHANGE CARRIER" (ILEC) means any local
                  exchange carrier that was as of February 8, 1996, deemed to be
                  a member of the Exchange Carrier Association as set forth in
                  47 C.F.R. ss.69.601(b) of the FCC's regulations.

         1.38     "INTERIM NUMBER PORTABILITY (INP)" means the delivery of LNP
                  capabilities, from a customer standpoint in terms of call
                  completion, with as little impairment of functioning, quality,
                  reliability, and convenience as possible and from a carrier
                  standpoint in terms of compensation, through the use of
                  existing and available call routing, forwarding, and
                  addressing capabilities.

         1.39     "INTERCONNECTION POINT" ("IP") means the physical point on the
                  network where the two parties interconnect. The "IP" is the
                  demarcation point between ownership of the transmission
                  facility.

         1.40     "ISDN USER PART (ISUP)" means a part of the SS7 protocol
                  that defines call setup messages and call takedown messages.

         1.41     "IXC" OR "INTEREXCHANGE CARRIER" means a telecommunications
                  service provider authorized by the FCC to provide interstate
                  long distance communications services between LATAs and are
                  authorized by the State to provide inter- and/or intraLATA
                  long distance communications services within the State.

         1.42     "INTERNETWORK FACILITIES" OR "INTERCONNECTION FACILITY" means
                  the physical connection of separate pieces of equipment,
                  transmission facilities, etc., within, between and among
                  networks, for the transmission and routing of exchange service
                  and exchange access.

         1.43     "LATA" means Local Access and Transport Area. A LATA denotes a
                  geographic area for the provision and administration of
                  communications service; i.e., intraLATA or interLATA.

         1.44     "LINE INFORMATION DATA BASE (LIDB)" means one or all, as the
                  context may require, of the Line Information databases owned
                  individually by GTE and other entities which provide, among
                  other things, calling card validation functionality for
                  telephone line number cards issued by GTE and other entities.
                  A LIDB also contains validation data for collect and third
                  number-billed calls; i.e., Billed Number Screening.

         1.45     "LINE SIDE" refers to an end office switch connection that has
                  been programmed to treat the circuit as a local line connected
                  to an ordinary telephone station set. Line side 


                                      II-4


<PAGE>   18
                  connections offer only those transmission and signaling
                  features appropriate for a connection between an end office
                  and an ordinary telephone set.

         1.46     "LOCAL EXCHANGE CARRIER" OR "LEC" means any company certified
                  by the Commission to provide local exchange telecommunications
                  service. This includes the Parties to this Agreement.

         1.47     "LOCAL EXCHANGE ROUTING GUIDE" OR "LERG" means the Bellcore
                  reference customarily used to identify NPA-NXX routing and
                  homing information, as well as network element and equipment
                  designation.

         1.48     "LOCAL NUMBER PORTABILITY (LNP)" means the ability of users of
                  telecommunications services to retain, at the same location,
                  existing telecommunications numbers without impairment of
                  quality, reliability, or convenience when switching from one
                  telecommunications carrier to another.

         1.49     "LOCAL TRAFFIC" means traffic that is originated by an end
                  user of one Party and terminates to the end user of the other
                  Party within GTE's then current local serving area, including
                  mandatory local calling scope arrangements. A mandatory local
                  calling scope arrangement is an arrangement that provides end
                  users a local calling scope, Extended Area Service ("EAS"),
                  beyond their basic exchange serving area. Local Traffic does
                  not include optional local calling scopes (i.e., optional rate
                  packages that permit the end user to choose a local calling
                  scope beyond their basic exchange serving area for an
                  additional fee), referred to hereafter as "optional EAS."
                  Local Traffic excludes Information Service Provider ("ISP")
                  traffic (e.g., Internet, paging, 900-976, etc.).

         1.50     "MDF" OR "MAIN DISTRIBUTION FRAME" means the distribution
                  frame used to interconnect cable pairs and line trunk
                  equipment terminating on a switching system.

         1.51     "MEET-POINT BILLING" OR "MPB" refers to an arrangement whereby
                  two LECs jointly provide the transport element of a switched
                  access service to one of the LEC's end office switches, with
                  each LEC receiving an appropriate share of the transport
                  element revenues as defined by their effective access tariffs.

         1.52     "MECAB" refers to the Multiple Exchange Carrier Access Billing
                  ("MECAB") document prepared by the Billing Committee of the
                  Ordering and Billing Forum ("OBF"), which functions under the
                  auspices of the Carrier Liaison Committee ("CLC") of the
                  Alliance for Telecommunications Industry Solutions ("ATIS").
                  The MECAB document, published by Bellcore as Special Report
                  SR-BDS-000983, contains the recommended guidelines for the
                  billing of an access service provided by two or more LECs, or
                  by one LEC in two or more states within a single LATA.

         1.53     "MECOD" refers to the Multiple Exchange Carriers Ordering and
                  Design ("MECOD") Guidelines for Access Services - Industry
                  Support Interface, a document developed by the
                  Ordering/Provisioning Committee under the auspices of the
                  Ordering and Billing Forum ("OBF"), which functions under the
                  auspices of the Carrier Liaison Committee ("CLC") of the
                  Alliance for Telecommunications Industry Solutions ("ATIS").
                  The MECOD document, published by Bellcore as Special Report
                  SR-STS-002643, establish methods for processing orders for
                  access service which is to be provided by two or more LECs.

         1.54     "MID-SPAN FIBER MEET" means an Interconnection architecture
                  whereby two carriers' fiber transmission facilities meet at a
                  mutually agreed-upon POI.

                                      II-5

<PAGE>   19

         1.55     "NANP" means the "North American Numbering Plan", the system
                  of telephone numbering employed in the United States, Canada,
                  and the Caribbean countries that employ NPA 809.

         1.56     "NETWORK ELEMENT" means a facility or equipment used in the
                  provision of a telecommunications service. Network Element
                  includes features, functions, and capabilities that are
                  provided by means of such facility or equipment, including
                  subscriber numbers, databases, signaling systems, and
                  information sufficient for billing and collection or used in
                  the transmission, routing, or other provision of a
                  telecommunications service.

         1.57     "NID" OR "NETWORK INTERFACE DEVICE" means the point of
                  demarcation between the end user's inside wiring and GTE's
                  facilities.

         1.58     "NUMBERING PLAN AREA" OR "NPA" is also sometimes referred to
                  as an area code. This is the three digit indicator which is
                  defined by the "A", "B", and "C" digits of each 10-digit
                  telephone number within the NANP. Each NPA contains 800
                  possible NXX Codes. There are two general categories of NPA,
                  "Geographic NPAs" and "Non-Geographic NPAs". A Geographic NPA
                  is associated with a defined geographic area, and all
                  telephone numbers bearing such NPA are associated with
                  services provided within that geographic area. A
                  Non-Geographic NPA, also known as a "Service Access Code" or
                  "SAC Code" is typically associated with a specialized
                  telecommunications service which may be provided across
                  multiple geographic NPA areas. 800, 900, 700, and 888 are
                  examples of Non-Geographic NPAs.

         1.59     "NXX", "NXX CODE", "CENTRAL OFFICE CODE" OR "CO CODE" is the
                  three digit switch entity indicator which is defined by the
                  "D", "E", and "F" digits of a 10-digit telephone number within
                  the NANP. Each NXX Code contains 10,000 station numbers.

         1.60     "911 SERVICE" means a universal telephone number which gives
                  the public direct access to the PSAP. Basic 911 service
                  collects 911 calls from one or more local exchange switches
                  that serve a geographic area. The calls are then sent to the
                  correct authority designated to receive such calls.

         1.61     "OWNER AND OPERATOR" means as used in OSHA regulations, owner
                  is the legal entity, including a lessee, which exercises
                  control over management and record keeping functions relating
                  to a building or facility. As used in the Resource
                  Conservation and Recovery Act (RCRA), operator means the
                  person responsible for the overall (or part of the) operations
                  of a facility.

         1.62     "POI" means Point of Interconnection designated for routing of
                  local interconnection trunks.

         1.63     "POLE ATTACHMENT" has the meaning as set forth in Article X 
                  and Appendix K of this Agreement.
                  

         1.64     "PROVIDER" may mean GTE or DTI depending on the context
                  and which Party is providing the service to the other Party.

         1.65     "PUBLIC SAFETY ANSWERING POINT" OR "PSAP" means an answering
                  location for 9-1-1 calls originating in a given area. A PSAP
                  may be designated as Primary or Secondary, which refers to the
                  order in which calls are directed for answering. Primary PSAPs
                  respond first; Secondary PSAPs receive calls on a transfer
                  basis only, and generally serve as a centralized answering
                  location for a particular type of emergency call. PSAPs are
                  staffed 

                                      II-6

<PAGE>   20
                  by employees of Emergency Response Agencies ("ERAs") such as
                  police, fire or emergency medical agencies or by employees of
                  a common bureau serving a group of such entities.

         1.66     "RATE CENTER" means the specific geographic point and
                  corresponding geographic area that are associated with one or
                  more particular NPA-NXX Codes that have been assigned to a LEC
                  for its provision of Exchange Services. The geographic point
                  is identified by a specific Vertical and Horizontal (V&H)
                  coordinate that is used to calculate distance-sensitive end
                  user traffic to/from the particular NPA-NXXs associated with
                  the specific Rate Center.

         1.67     "RIGHT-OF-WAY" OR "ROW" means the right to use the land or
                  other property of another party to place poles, conduits,
                  cables, other structures and equipment, or to provide passage
                  to access such structures and equipment. A ROW may run under,
                  on, or above public or private property (including air space
                  above public or private property) and may include the right to
                  use discrete space in buildings, building complexes, or other
                  locations.

         1.68     "ROUTING POINT" denotes a location that a LEC has designated
                  on its network as the homing (routing) point for traffic that
                  terminates to Exchange Services provided by the LEC that bear
                  a certain NPA-NXX designation. The Routing Point is used to
                  calculate airline mileage for the distance-sensitive transport
                  element charges of Switched Access Services. Pursuant to
                  Bellcore Practice BR795-100-100, the Routing Point may be an
                  end office location, or a "LEC Consortium Point of
                  Interconnection." The Routing Point must be in the same LATA
                  as the associated NPA-NXX.

         1.69     "SERVICE CONTROL POINT" OR "SCP" is the node in the signaling
                  network to which informational requests for service handling,
                  such as routing, are directed and processed. The SCP is a real
                  time database system that, based on a query from the SSP,
                  performs subscriber or application-specific service logic, and
                  then sends instructions back to the SSP on how to continue
                  call processing.

         1.70     "SERVICE SWITCHING POINT" OR "SSP" means a Signaling Point
                  that can launch queries to databases and receive/interpret
                  responses used to provide specific customer services.

         1.71     "SIGNALING POINT" OR "SP" means a node in the CCS network that
                  originates and/or receives signaling messages, or transfers
                  signaling messages from one signaling link to another, or
                  both.

         1.72     "SIGNALING SYSTEM 7" OR "SS7" means the signaling protocol,
                  Version 7, of the CCS network, based upon American National
                  Standards Institute ("ANSI") standards.

         1.73     "SIGNAL TRANSFER POINT" OR "STP" means a packet switch in the
                  CCS network that is used to route signaling messages among
                  SSPs, SCPs and other STPs in order to set up calls and to
                  query databases for advanced services. GTE's network includes
                  mated pairs of local and regional STPs. STPs are provided in
                  pairs for redundancy. GTE STPs conform to ANSI T1.111-8
                  standards.

         1.74     "SUBSIDIARY" of a Party means a corporation or other legal
                  entity that is majority owned by such Party.

         1.75     "SYNCHRONOUS OPTICAL NETWORK" OR "SONET" means synchronous
                  electrical ("STS") or optical channel ("OC") connections
                  between LECs.


                                      II-7

<PAGE>   21

         1.76     "SWITCHED ACCESS SERVICE" means the offering of facilities for
                  the purpose of the origination or termination of traffic to or
                  from Exchange Service customers in a given area pursuant to a
                  switched access tariff. Switched Access Services include:
                  Feature Group A, Feature Group B, Feature Group C, Feature
                  Group D, 800 access and 900 access services.

         1.77     "TELECOMMUNICATIONS SERVICES" means the offering of
                  telecommunications for a fee directly to the public, or to
                  such classes of users as to be effectively available directly
                  to the public, regardless of the facilities used.

         1.78     "THIRD PARTY CONTAMINATION" means environmental pollution that
                  is not generated by the LEC or DTI but results from off-site
                  activities impacting a facility.

         1.79     "TRUNK SIDE" refers to a central office switch connection that
                  is capable of, and has been programmed to treat the circuit
                  as, connecting to another switching entity, for example, to
                  another central office switch. Trunk side connections offer
                  those transmission and signaling features appropriate for the
                  connection of switching entities and cannot be used for the
                  direct connection of ordinary telephone station sets.

         1.80     "UNDEFINED TERMS" means the Parties acknowledge that terms may
                  appear in this Agreement which are not defined and agree that
                  any such terms shall be construed in accordance with their
                  customary usage in the telecommunications industry as of the
                  effective date of this Agreement.

         1.81     "VERTICAL FEATURES" (INCLUDING "CLASS FEATURES") means
                  vertical services and switch functionalities provided by GTE,
                  including: Automatic Call Back; Automatic Recall; Call
                  Forwarding Busy Line/Don't Answer; Call Forwarding Don't
                  Answer; Call Forwarding Variable; Call Forwarding - Busy Line;
                  Call Trace; Call Waiting; Call Number Delivery Blocking Per
                  Call; Calling Number Blocking Per Line; Cancel Call Waiting;
                  Distinctive Ringing/Call Waiting; Incoming Call Line
                  Identification Delivery; Selective Call Forward; Selective
                  Call Rejection; Speed Calling; and Three Way Calling/Call
                  Transfer.

         1.82     "WIRE CENTER" means a building or space within a building that
                  serves as an aggregation point on a LEC's network, where
                  transmission facilities and circuits are connected or
                  switched. "Wire center" can also denote a building in which
                  one or more Central Offices, used for the provision of
                  exchange services and access services, are located.


                                      II-8
<PAGE>   22



                                   ARTICLE III
                               GENERAL PROVISIONS

1.       Scope of General Provisions. Except as may otherwise be set forth in a
         particular Article or Appendix of this Agreement, in which case the
         provisions of such Article or Appendix shall control, these General
         Provisions apply to all Articles and Appendices of this Agreement.

2.       Term and Termination.

         2.1      Term. Subject to the termination provisions contained in this
                  Agreement, the term of this Agreement shall be two (2) years
                  from the effective date referenced in the first paragraph of
                  this Agreement and shall continue in effect for consecutive
                  one (1) year terms until either Party gives the other Party at
                  least ninety (90) calendar days written notice of termination,
                  which termination shall be effective at the end of the
                  then-current term. In the event notice is given less than 90
                  calendar days prior to the end of the current term, this
                  Agreement shall remain in effect for 90 calendar days after
                  such notice is received, provided, that in no case shall the
                  term be extended beyond 90 calendar days after the end of the
                  current term.

         2.2      Post-Termination Arrangements. Except in the case of
                  termination as a result of either Party's default or a
                  termination upon sale, for service arrangements made available
                  under this Agreement and existing at the time of termination,
                  those arrangements may continue without interruption (a) under
                  a new agreement voluntarily executed by the Parties; (b)
                  standard terms and conditions approved and made generally
                  effective by the Commission, if any; (c) tariff terms and
                  conditions made generally available to all CLECs; or (d) any
                  rights under Section 252(I) of the Act.

         2.3      Termination Upon Default. Either Party may terminate this
                  Agreement in whole or in part in the event of a default by the
                  other Party; provided however, that the non-defaulting Party
                  notifies the defaulting party in writing of the alleged
                  default and that the defaulting Party does not cure the
                  alleged default within sixty (60) calendar days of receipt of
                  written notice thereof. Default is defined to include:

         (a)      A Party's insolvency or the initiation of bankruptcy or 
                  receivership proceedings by or against the Party; or

         (b)      A Party's refusal or failure in any material respect properly
                  to perform its obligations under this Agreement, or the
                  violation any of the material terms or conditions of this
                  Agreement.

         2.4      Termination Upon Sale. Notwithstanding anything to the
                  contrary contained herein, a Party may terminate this
                  Agreement as to a specific operating area or portion thereof
                  of such Party if such Party sells or otherwise transfers the
                  area or portion thereof. The Party shall provide the other
                  Party with at least ninety (90) calendar days' prior written
                  notice of such termination, which shall be effective on the
                  date specified in the notice. Notwithstanding termination of
                  this Agreement as to a specific operating area, this Agreement
                  shall remain in full force and effect in the remaining
                  operating areas.

         2.5      Liability upon Termination. Termination of this Agreement, or
                  any part hereof, for any cause shall not release either Party
                  from any liability which at the time of termination had
                  already accrued to the other Party or which thereafter accrues
                  in any respect to any act or omission occurring prior to the
                  termination or from an obligation which is expressly stated in
                  this Agreement to survive termination.

                                     III-1

<PAGE>   23

3.       Amendments. Any amendment, modification, or supplement to this
         Agreement must be in writing and signed by an authorized representative
         of each Party. The term "this Agreement" shall include future
         amendments, modifications, and supplements.

4.       Assignment. Any assignment by either Party of any right, obligation, or
         duty, in whole or in part, or of any interest, without the written
         consent of the other Party shall be void, except that either Party may
         assign all of its rights, and delegate its obligations, liabilities and
         duties under this Agreement, either in whole or in part, to any entity
         that is, or that was immediately preceding such assignment, a
         Subsidiary or Affiliate of that Party without consent, but with written
         notification. The effectiveness of an assignment shall be conditioned
         upon the assignee's written assumption of the rights, obligations, and
         duties of the assigning Party.

5.       Authority. Each person whose signature appears on this Agreement
         represents and warrants that he or she has authority to bind the Party
         on whose behalf he or she has executed this Agreement.

6.       Responsibility for Payment. All charges for Services provided under
         this Agreement will be billed to DTI, including all applicable taxes
         and surcharges. In addition, the End User Common Line (EUCL) Charge
         from GTOC Tariff FCC No. 1 is applicable to Resold Services. DTI is
         responsible for payment of charges billed regardless of any billing
         arrangements or situation between DTI and its end user customer.

7.       Billing and Payment. Except as provided elsewhere in this Agreement and
         where applicable, in conformance with MECAB and MECOD guidelines, DTI
         and GTE agree to exchange all information to accurately, reliably, and
         properly bill for features, functions and services rendered under this
         Agreement.

         7.1      Dispute. If one Party disputes a billing statement issued by
                  the other Party, the billed Party shall notify Provider in
                  writing regarding the nature and the basis of the dispute
                  within six (6) months of the statement date or the dispute
                  shall be waived. The Parties shall diligently work toward
                  resolution of all billing issues.

         7.2      Late Payment Charge. If any undisputed amount due on the
                  billing statement is not received by Provider on the payment
                  due date, Provider may charge, and Customer agrees to pay, at
                  Provider's option, interest on the past due balance at a rate
                  equal to the lesser of the interest rates set forth in the
                  applicable GTE/Contel state access tariffs or the GTOC/GSTC
                  FCC No. 1 tariff, one and one-half percent (1 1/2%) per
                  month or the maximum nonusurious rate of interest under
                  applicable law. Late payment charges shall be included on the
                  next statement.

         7.3      Due Date.  Payment is due 30 calendar days from the bill date.
                  
         7.4      Audits. Either Party may conduct an audit of the other Party's
                  books and records pertaining to the Services provided under
                  this Agreement, no more frequently than once per twelve (12)
                  month period, to evaluate the other Party's accuracy of
                  billing, data and invoicing in accordance with this Agreement.
                  Any audit shall be performed as follows: (I) following at
                  least thirty (30) Business Days' prior written notice to the
                  audited Party; (ii) subject to the reasonable scheduling
                  requirements and limitations of the audited Party: (iii) at
                  the auditing Party's sole cost and expense; (iv) of a
                  reasonable scope and duration; (v) in a manner so as not to
                  interfere with the audited Party's business operations; and
                  (vi) in compliance with the audited Party's security rules.


                                     III-2
<PAGE>   24

8.       Binding Effect. This Agreement shall be binding on and inure to the
         benefit of the respective successors and permitted assigns of the
         Parties.

9.       Capacity Planning and Forecasting. Within thirty (30) days from the
         Effective Date of this Agreement, the Parties agree to have met and
         developed joint planning and forecasting responsibilities which are
         applicable to Local Services, including Features, Network Elements,
         INP, Interconnection Services, Collocation, Poles, Conduits and Rights
         of Way (ROW). Such responsibilities shall include but are not limited
         to the following:

         (a)      The Parties will establish periodic reviews of network and
                  technology plans and will notify one another no later than six
                  (6) months in advance of changes that would impact either
                  Party's provision of services.

         (b)      DTI will furnish to GTE information that provides for
                  state-wide annual forecasts of order activity, in-service
                  quantity forecasts, and facility/demand forecasts.

         (c)      The Parties will develop joint forecasting responsibilities
                  for traffic utilization over trunk groups and yearly
                  forecasted trunk quantities.

         (d)      DTI shall notify GTE promptly of changes to current forecasts
                  (increase or decrease) that generate a shift in the demand
                  curve for the following forecasting period.

10.      Compliance with Laws and Regulations. Each Party shall comply with all
         federal, state, and local statutes, regulations, rules, ordinances,
         judicial decisions, and administrative rulings applicable to its
         performance under this Agreement.

11.      Confidential Information.

         11.1     Identification. Either Party may disclose to the other
                  proprietary or confidential customer, technical, or business
                  information in written, graphic, oral or other tangible or
                  intangible forms ("Confidential Information"). In order for
                  information to be considered Confidential Information under
                  this Agreement, it must be marked "Confidential" or
                  "Proprietary," or bear a marking of similar import. Orally or
                  visually disclosed information shall be deemed Confidential
                  Information only if contemporaneously identified as such and
                  reduced to writing and delivered to the other Party with a
                  statement or marking of confidentiality within thirty (30)
                  calendar days after oral or visual disclosure.

         Notwithstanding the foregoing, preorders and all orders for Services or
         network elements placed by DTI pursuant to this Agreement, and
         information that would constitute customer proprietary network
         information of DTI end user customers pursuant to the Act and the rules
         and regulations of the FCC, as well as recorded usage information with
         respect to DTI end users, whether disclosed by DTI to GTE or otherwise
         acquired by GTE in the course of its performance under this Agreement,
         and where GTE is the NANP Number Plan Administrator, DTI information
         submitted to GTE in connection with such responsibilities shall be
         deemed Confidential Information of DTI for all purposes under this
         Agreement whether or not specifically marked or designated as
         confidential or proprietary.

         11.2 Handling. In order to protect such Confidential Information from
              improper disclosure, each Party agrees:

         (a)  That all Confidential Information shall be and shall remain 
              the exclusive property of the source;


                                     III-3

<PAGE>   25


         (b)      To limit access to such Confidential Information to authorized
                  employees who have a need to know the Confidential Information
                  for performance of this Agreement;

         (c)      To keep such Confidential Information confidential and to use
                  the same level of care to prevent disclosure or unauthorized
                  use of the received Confidential Information as it exercises
                  in protecting its own Confidential Information of a similar
                  nature;

         (d)      Not to copy, publish, or disclose such Confidential
                  Information to others or authorize anyone else to copy,
                  publish, or disclose such Confidential Information to others
                  without the prior written approval of the source;

         (e)      To return promptly any copies of such Confidential Information
                  to the source at its request; and

         (f)      To use such Confidential Information only for purposes of
                  fulfilling work or services performed hereunder and for other
                  purposes only upon such terms as may be agreed upon between
                  the Parties in writing.

         11.3     Exceptions. These obligations shall not apply to any
                  Confidential Information that was legally in the recipient's
                  possession prior to receipt from the source, was received in
                  good faith from a Third Party not subject to a confidential
                  obligation to the source, now is or later becomes publicly
                  known through no breach of confidential obligation by the
                  recipient, was developed by the recipient without the
                  developing persons having access to any of the Confidential
                  Information received in confidence from the source, or that is
                  required to be disclosed pursuant to subpoena or other process
                  issued by a court or administrative agency having appropriate
                  jurisdiction, provided, however, that the recipient shall give
                  prior notice to the source and shall reasonably cooperate if
                  the source deems it necessary to seek protective arrangements.

         11.4     Survival. The obligation of confidentiality and use with
                  respect to Confidential Information disclosed by one Party to
                  the other shall survive any termination of this Agreement for
                  a period of three (3) years from the date of the initial
                  disclosure of the Confidential Information.

12.      Consent. Where consent, approval, or mutual agreement is required of a
         Party, it shall not be unreasonably withheld or delayed.

13.      Cooperation on Fraud Minimization. DTI assumes responsibility for all
         fraud associated with its end user customers and accounts. GTE shall
         have no responsibility for, nor is it required to investigate or make
         adjustments to DTI's account in cases of fraud. The Parties agree that
         they shall cooperate with one another to resolve cases of fraud. The
         Parties' fraud minimization procedures are to be cost effective and
         implemented so as not to unduly burden or harm one Party as compared to
         the other.

14.      Dispute Resolution.

         14.1     Alternative to Litigation. Except as provided under Section
                  252 of the Act with respect to the approval of this Agreement
                  by the Commission, the Parties desire to resolve disputes
                  arising out of or relating to this Agreement without
                  litigation. Accordingly, except for action seeking a temporary
                  restraining order or an injunction related to the purposes of
                  this Agreement, or suit to compel compliance with this dispute
                  resolution process, the Parties agree to use the following
                  alternative dispute resolution procedures as their sole remedy

                                     III-4

<PAGE>   26

                  with respect to any controversy or claim arising out of or
                  relating to this Agreement or its breach.

         14.2     Negotiations. At the written request of a Party, each Party
                  will appoint a knowledgeable, responsible representative to
                  meet and negotiate in good faith to resolve any dispute
                  arising out of or relating to this Agreement. The Parties
                  intend that these negotiations be conducted by non-lawyer,
                  business representatives. The location, format, frequency,
                  duration, and conclusion of these discussions shall be left to
                  the discretion of the representatives. Upon agreement, the
                  representatives may utilize other alternative dispute
                  resolution procedures such as mediation to assist in the
                  negotiations. Discussions and correspondence among the
                  representatives for purposes of these negotiations shall be
                  treated as confidential information developed for purposes of
                  settlement, exempt from discovery, and shall not be admissible
                  in the arbitration described below or in any lawsuit without
                  the concurrence of all Parties. Documents identified in or
                  provided with such communications, which are not prepared for
                  purposes of the negotiations, are not so exempted and may, if
                  otherwise discoverable, be discovered or otherwise admissible,
                  be admitted in evidence, in the arbitration or lawsuit.

         14.3     Arbitration. If the negotiations do not resolve the dispute
                  within sixty (60) Business Days of the initial written
                  request, the dispute shall be submitted to binding arbitration
                  by a single arbitrator pursuant to the Commercial Arbitration
                  Rules of the American Arbitration Association except that the
                  Parties may select an arbitrator outside American Arbitration
                  Association rules upon mutual agreement. A Party may demand
                  such arbitration in accordance with the procedures set out in
                  those rules. Discovery shall be controlled by the arbitrator
                  and shall be permitted to the extent set out in this section.
                  Each Party may submit in writing to a Party, and that Party
                  shall so respond to, a maximum of any combination of
                  thirty-five (35) (none of which may have subparts) of the
                  following: interrogatories, demands to produce documents, or
                  requests for admission. Each Party is also entitled to take
                  the oral deposition of one individual of another Party.
                  Additional discovery may be permitted upon mutual agreement of
                  the Parties. The arbitration hearing shall be commenced within
                  sixty (60) Business Days of the demand for arbitration. The
                  arbitration shall be held in a mutually agreeable city. The
                  arbitrator shall control the scheduling so as to process the
                  matter expeditiously. The Parties may submit written briefs.
                  The arbitrator shall rule on the dispute by issuing a written
                  opinion within thirty (30) Business Days after the close of
                  hearings. The times specified in this section may be extended
                  upon mutual agreement of the Parties or by the arbitrator upon
                  a showing of good cause. Judgment upon the award rendered by
                  the arbitrator may be entered in any court having
                  jurisdiction.

         14.4     Expedited Arbitration Procedures. If the issue to be resolved
                  through the negotiations referenced in Section 14.2 directly
                  and materially affects service to either Party's end user
                  customers, then the period of resolution of the dispute
                  through negotiations before the dispute is to be submitted to
                  binding arbitration shall be five (5) Business Days. Once such
                  a service affecting dispute is submitted to arbitration, the
                  arbitration shall be conducted pursuant to the expedited
                  procedures rules of the Commercial Arbitration Rules of the
                  American Arbitration Association (i.e., rules 53 through 57).

         14.5     Costs. Each Party shall bear its own costs of these
                  procedures. A Party seeking discovery shall reimburse the
                  responding Party the costs of production of documents
                  (including search time and reproduction costs). The Parties
                  shall equally split the fees of the arbitration and the
                  arbitrator.


                                     III-5

<PAGE>   27


         14.6     Continuous Service. The Parties shall continue providing
                  services to each other during the pendency of any dispute
                  resolution procedure, and the Parties shall continue to
                  perform their obligations (including making payments in
                  accordance with Article IV, Section 4) in accordance with this
                  Agreement.

15.      Entire Agreement. This Agreement constitutes the entire agreement of
         the Parties pertaining to the subject matter of this Agreement and
         supersedes all prior agreements, negotiations, proposals, and
         representations, whether written or oral, and all contemporaneous oral
         agreements, negotiations, proposals, and representations concerning
         such subject matter. No representations, understandings, agreements, or
         warranties, expressed or implied, have been made or relied upon in the
         making of this Agreement other than those specifically set forth
         herein.

16.      Expenses. Except as specifically set out in this Agreement, each Party
         shall be solely responsible for its own expenses involved in all
         activities related to the subject of this Agreement.

17.      Force Majeure.  In the event performance of this Agreement, or any 
         obligation hereunder, is either directly or indirectly prevented,
         restricted, or interfered with by reason of fire, flood, earthquake or
         likes acts of God, wars, revolution, civil commotion, explosion, acts
         of public enemy, embargo, acts of the government in its sovereign
         capacity, labor difficulties, including without limitation, strikes,
         slowdowns, picketing, or boycotts, unavailability of equipment from
         vendor, changes requested by Customer, or any other circumstances
         beyond the reasonable control and without the fault or negligence of
         the Party affected, the Party affected, upon giving prompt notice to
         the other Party, shall be excused from such performance on a
         day-to-day basis to the extent of such prevention, restriction, or
         interference (and the other Party shall likewise be excused from
         performance of its obligations on a day-to-day basis until the delay,
         restriction or interference has ceased); provided however, that the
         Party so affected shall use diligent efforts to avoid or remove such
         causes of nonperformance and both Parties shall proceed whenever such
         causes are removed or cease.
        
18.      Good Faith Performance. In the performance of their obligations under
         this Agreement, the Parties shall act in good faith. In situations in
         which notice, consent, approval or similar action by a Party is
         permitted or required by any provision of this Agreement, such action
         shall not be unreasonably delayed, withheld or conditioned.

19.      Governing Law. This Agreement shall be governed by and construed in
         accordance with the domestic laws of the state where the Services are
         provided or the facilities reside and shall be subject to the exclusive
         jurisdiction of the courts therein.

20.      Standard Practices. The Parties acknowledge that GTE shall be adopting
         some industry standard approaches and/or establishing its own standard
         approaches to various requirements hereunder applicable to DTI industry
         which may be added in the Guide. DTI agrees that GTE may implement such
         approaches to satisfy any GTE obligations under this Agreement. A copy
         is attached hereto as Appendix ? and is incorporated by reference into
         this Agreement.

21.      Headings. The headings in this Agreement are inserted for convenience
         and identification only and shall not be considered in the
         interpretation of this Agreement.

22.      Independent Contractor Relationship.  The persons provided by each 
         Party shall be solely that Party's employees and shall be under the
         sole and exclusive direction and control of that Party. They shall not
         be considered employees of the other Party for any purpose. Each Party
         shall remain an independent contractor with respect to the other and
         shall be responsible for compliance with all laws, rules and
         regulations involving, but not limited to, employment of labor,

                                     III-6

<PAGE>   28

         hours of labor, health and safety, working conditions and
         payment of wages. Each Party shall also be responsible for payment of
         taxes, including federal, state and municipal taxes, chargeable or
         assessed with respect to its employees, such as Social Security,
         unemployment, workers' compensation, disability insurance, and federal
         and state withholding. Each Party shall indemnify the other for any
         loss, damage, liability, claim, demand, or penalty that may be
         sustained by reason of its failure to comply with this provision.

23.      Law Enforcement Interface.

         23.1     Except to the extent not available in connection with GTE's
                  operation of its own business, GTE shall provide seven day a
                  week/twenty-four hour a day assistance to law enforcement
                  persons for emergency traps, assistance involving emergency
                  traces and emergency information retrieval on customer invoked
                  CLASS services, including, without limitation, call traces
                  requested by DTI.

         23.2     GTE agrees to work jointly with DTI in security matters to
                  support law enforcement agency requirements for taps, traces,
                  court orders, etc. Charges for providing such services for DTI
                  Customers will be billed to DTI.

         23.3     GTE will, in non emergency situations, inform the requesting
                  law enforcement agencies that the end-user to be wire tapped,
                  traced, etc. is a DTI Customer and shall refer them to DTI.

24.      Liability and Indemnity.

         24.1     Indemnification. Subject to the limitations set forth in
                  Section 24.4 of this Article III, each Party agrees to
                  release, indemnify, defend, and hold harmless the other Party
                  from all losses, claims, demands, damages, expenses, suits, or
                  other actions, or any liability whatsoever, including, but not
                  limited to, costs and attorney's fees, whether suffered, made,
                  instituted, or asserted by any other party or person, for
                  invasion of privacy, personal injury to or death of any person
                  or persons, or for losses, damages, or destruction of
                  property, whether or not owned by others, proximately caused
                  by the indemnifying Party's negligence or willful misconduct,
                  regardless of form of action. The indemnified Party agrees to
                  notify the other Party promptly, in writing, of any written
                  claims, lawsuits, or demands for which it is claimed that the
                  indemnifying Party is responsible under this Section and to
                  cooperate in every reasonable way to facilitate defense or
                  settlement of claims. The indemnifying Party shall have
                  complete control over defense of the case and over the terms
                  of any proposed settlement or compromise thereof. The
                  indemnifying Party shall not be liable under this Section for
                  settlement by the indemnified Party or any claim, lawsuit, or
                  demand, if the indemnifying Party has not approved the
                  settlement in advance, unless the indemnifying Party has had
                  the defense of the claim, lawsuit, or demand tendered to it in
                  writing and has failed to assume such defense. In the event of
                  such failure to assume defense, the indemnifying Party shall
                  be liable for any reasonable settlement made by the
                  indemnified Party without approval of the indemnifying Party.

         24.2     End User and Content-Related Claims. Each Party agrees to
                  release, indemnify, defend, and hold harmless the other Party,
                  its affiliates, and any third-party provider or operator of
                  facilities involved in the provision of Services, Unbundled
                  Network Elements or Facilities under this Agreement
                  (collectively, the "Indemnified Party") from all losses,
                  claims, demands, damages, expenses, suits, or other actions,
                  or any liability whatsoever, including, but not limited to,
                  costs and attorney's fees, suffered, made, instituted, or
                  asserted by either Party's end users against an Indemnified
                  Party arising from Services, Unbundled Network Elements or
                  Facilities. Each Party further agrees to release, indemnify,
                  defend, and hold

                                     III-7


<PAGE>   29
                  harmless the Indemnified Party from all losses, claims,
                  demands, damages, expenses, suits, or other actions, or any   
                  liability whatsoever, including, but not limited to, costs
                  and attorney's fees, suffered, made, instituted, or asserted
                  by any Third Party against an Indemnified Party arising from
                  or in any way related to actual or alleged defamation, libel,
                  slander, interference with or misappropriation of proprietary
                  or creative right, or any other injury to any person or
                  property arising out of content transmitted by the
                  Indemnified Party or such Party's end users, or any other act
                  or omission of the Indemnified Party or such Party's end
                  users.

         24.3     DISCLAIMER. EXCEPT AS SPECIFICALLY PROVIDED TO THE CONTRARY IN
                  THIS AGREEMENT, PROVIDER MAKES NO REPRESENTATIONS OR
                  WARRANTIES TO CUSTOMER CONCERNING THE SPECIFIC QUALITY OF ANY
                  SERVICES, UNBUNDLED NETWORK ELEMENTS OR FACILITIES PROVIDED
                  UNDER THIS AGREEMENT. PROVIDER DISCLAIMS, WITHOUT LIMITATION,
                  ANY WARRANTY OR GUARANTEE OF MERCHANTABILITY OR FITNESS FOR A
                  PARTICULAR PURPOSE, ARISING FROM COURSE OF PERFORMANCE, COURSE
                  OF DEALING, OR FROM USAGES OF TRADE.

         24.4     Limitation of Liability. Each Party's liability, whether in
                  contract, tort or otherwise, shall be limited to direct
                  damages, which shall not exceed the monthly charges for the
                  Services, Unbundled Network Elements or facilities for the
                  month during which the claim of liability arose. Under no
                  circumstance shall either Party be responsible or liable for
                  indirect, incidental, or consequential damages, including, but
                  not limited to, economic loss or lost business or profits,
                  damages arising from the use or performance of equipment or
                  software, or the loss of use of software or equipment, or
                  accessories attached thereto, delay, error, or loss of data.
                  Should either Party provide advice, make recommendations, or
                  supply other analysis related to the Services, unbundled
                  network elements or facilities described in this Agreement,
                  this limitation of liability shall apply to provision of such
                  advice, recommendations, and analysis.

         24.5     Intellectual Property. Neither Party shall have any obligation
                  to defend, indemnify or hold harmless, or acquire any license
                  or right for the benefit of, or owe any other obligation or
                  have any liability to, the other based on or arising from any
                  claim, demand, or proceeding by any Third Party alleging or
                  asserting that the use of any circuit, apparatus, or system,
                  or the use of any software, or the performance of any service
                  or method, or the provision or use of any facilities by either
                  Party under this Agreement constitutes direct or contributory
                  infringement, or misuse or misappropriation of any patent,
                  copyright, trademark, trade secret, or any other proprietary
                  or intellectual property right of any Third Party.

25.      Multiple Counterparts. This Agreement may be executed in multiple
         counterparts, each of which shall be deemed an original, but all of
         which shall together constitute but one and the same document.

26.      No Offer. This Agreement will be effective only upon execution and
         delivery by both Parties and approval by the Commission in accordance
         with Section 252 of the Act.

27.      No Third Party Beneficiaries. Except as may be specifically set forth
         in this Agreement, this Agreement does not provide and shall not be
         construed to provide third parties with any remedy, claim, liability,
         reimbursement, cause of action, or other right or privilege.

28.      Notices.  Any notice to a Party required or permitted under this       
         Agreement shall be in writing and shall be deemed to have been received
         on the date of service if served personally, on the date receipt is
         acknowledged in writing by the recipient if delivered by regular U.S.
         mail, or on the date


                                     III-8


<PAGE>   30
         stated on the receipt if delivered by certified or registered mail or
         by a courier service that obtains a written receipt. Upon prior
         immediate oral agreement of the parties' designated recipients
         identified below, notice may also be provided by facsimile, internet or
         electronic messaging system, which shall be effective if sent before
         5:00 p.m. on that day, or if sent after 5:00 p.m. it will be effective
         on the next Business Day following the date sent. Any notice shall be
         delivered using one of the alternatives mentioned in this section and
         shall be directed to the applicable address indicated below or such
         address as the Party to be notified has designated by giving notice in
         compliance with this section:

         If to GTE:            GTE Central
                               Attention:  State Director, External Affairs
                               1000 GTE Drive
                               Building "A"
                               Wentzville, Missouri 63385
                               Facsimile number: (616) 727-1686
                               Internet Address:_________________

         If to DTI:            Digital Teleport, Inc.
                               Attention:  J.W. Sheehy, Vice President, I.C.
                               Support
                               11111 Dorsett Road
                               St. Louis, Missouri 63043
                               Facsimile number: (314) 253-6699
                               Internet Address:_________________
29.      Protection.

         29.1     Impairment of Service. The characteristics and methods of
                  operation of any circuits, facilities or equipment of either
                  Party connected with the services, facilities or equipment of
                  the other Party pursuant to this Agreement shall not interfere
                  with or impair service over any facilities of the other Party,
                  its affiliated companies, or its connecting and concurring
                  carriers involved in its services, cause damage to their
                  plant, violate any applicable law or regulation regarding the
                  invasion of privacy of any communications carried over the
                  Party's facilities or create hazards to the employees of
                  either Party or to the public (each hereinafter referred to as
                  an "Impairment of Service").

         29.2     Resolution. If either Party causes an Impairment in Service,
                  the Party whose network or service is being impaired (the
                  "Impaired Party") shall promptly notify the Party causing the
                  Impairment of Service (the "Impairing Party") of the nature
                  and location of the problem and that, unless promptly
                  rectified, a temporary discontinuance of the use of any
                  circuit, facility or equipment may be required. The Impairing
                  Party and the Impaired Party agree to work together to attempt
                  to promptly resolve the Impairment of Service. If the
                  Impairing Party is unable to promptly remedy the Impairment of
                  Service, then the Impaired Party may at its option temporarily
                  discontinue the use of the affected circuit, facility or
                  equipment.

30.      Publicity. Any news release, public announcement, advertising, or any
         form of publicity pertaining to this Agreement, provision of Services,
         Unbundled Network Elements or Facilities pursuant to it, or association
         of the Parties with respect to provision of the services described in
         this Agreement shall be subject to prior written approval of both GTE
         and DTI.

31.      Regulatory Agency Control. This Agreement shall at all times be subject
         to changes, modifications, orders, and rulings by the Federal
         Communications Commission and/or the applicable state utility
         regulatory commission to the extent the substance of this Agreement is
         or becomes subject to the jurisdiction of such agency.


                                     III-9

<PAGE>   31

32.      Changes in Legal Requirements. GTE and DTI further agree that the terms
         and conditions of this Agreement were composed in order to effectuate
         the legal requirements in effect at the time the Agreement was
         produced. Any modifications to those requirements will be deemed to
         automatically supersede any terms and conditions of this Agreement.

33.      Effective Date. If this Agreement or changes or modifications thereto
         are subject to approval of a regulatory agency, the "effective date" of
         this Agreement for such purposes will be ten (10) Business Days after
         such approval or in the event this Agreement is developed in whole or
         in part through arbitration, sixty (60) Business Days after such
         approval. Such date (i.e., ten (10) or, if arbitrated, sixty (60)
         Business Days after the approval) shall become the "effective date" of
         this Agreement for all purposes.

34.      Regulatory Matters. Each Party shall be responsible for obtaining and
         keeping in effect all their own FCC, state regulatory commission,
         franchise authority and other regulatory approvals that may be required
         in connection with the performance of its obligations under this
         Agreement.

35.      Rule of Construction. No rule of construction requiring interpretation
         against the drafting party hereof shall apply in the interpretation of
         this Agreement.

36.      Section References. Except as otherwise specified, references within an
         Article of this Agreement to a Section refer to Sections within that
         same Article.

37.      Service Standards.

         37.1     The Parties shall meet applicable quality of local service
                  standards imposed by the Commission and will provide a level
                  of services to each other under this Agreement in compliance
                  with the nondiscrimination requirements of the Act.

         37.2     GTE and DTI agree to implement the performance measures 
                  defined in Appendix ?.

         37.3     The Parties will alert each other to any network events that
                  can result or have resulted in service interruption, blocked
                  calls, and/or changes in network performance.

38.      Severability. If any provision of this Agreement is held by a court or
         regulatory agency of competent jurisdiction to be unenforceable, the
         rest of the Agreement shall remain in full force and effect and shall
         not be affected unless removal of that provision results, in the
         opinion of either Party, in a material change to this Agreement. If a
         material change as described in this paragraph occurs as a result of
         action by a court or regulatory agency, the Parties shall negotiate in
         good faith for replacement language. If replacement language cannot be
         agreed upon within a reasonable period, either Party may terminate this
         Agreement without penalty or liability for such termination upon
         written notice to the other Party.

39.      Subcontractors. Provider may enter into subcontracts with third parties
         or affiliates for the performance of any of Provider's duties or
         obligations under this Agreement.

40.      Subsequent Law. The terms and conditions of this Agreement shall be
         subject to any and all applicable laws, rules, or regulations that
         subsequently may be prescribed by any federal, state or local
         governmental authority. To the extent required by any such subsequently
         prescribed law, rule, or regulation, the Parties agree to modify, in
         writing, the affected term(s) and condition(s) of this Agreement to
         bring them into compliance with such law, rule, or regulation.

41.      Taxes. Any state or local excise, sales, or use taxes (excluding
         any taxes levied on income) resulting from the performance of this
         Agreement shall be borne by the Party upon which the 

                                     III-10

<PAGE>   32
         obligation for payment is imposed under applicable law, even if the
         obligation to collect and remit such taxes is placed upon the other
         Party. The collecting Party shall charge and collect from the obligated
         Party, and the obligated Party agrees to pay to the collecting Party,
         all applicable taxes, except to the extent that the obligated Party
         notifies the collecting Party and provides to the collecting Party
         appropriate documentation as GTE requires that qualifies the obligated
         Party for a full or partial exemption. Any such taxes shall be shown as
         separate items on applicable billing documents between the Parties. The
         obligated Party may contest the same in good faith, at its own expense,
         and shall be entitled to the benefit of any refund or recovery,
         provided that such Party shall not permit any lien to exist on any
         asset of the other Party by reason of the contest. The collecting Party
         shall cooperate in any such contest by the other Party. The other Party
         will indemnify the collecting Party from any sales or use taxes that
         may be subsequently levied on payments by the other Party by the
         collecting Party.

         41.1     Tax - A charge which is statutorily imposed by the state or
                  local jurisdiction and is either (a) imposed on the seller
                  with the seller having the right or responsibility to pass the
                  charge(s) on to the purchaser and the seller is responsible
                  for remitting the charge(s) to the state or local jurisdiction
                  or (b) imposed on the purchaser with the seller having an
                  obligation to collect the charge(s) from the purchaser and
                  remit the charge(s) to the state or local jurisdiction.

         Taxes shall include but not be limited to: federal excise tax,
         state/local sales and use tax, state/local utility user tax,
         state/local telecommunication excise tax, state/local gross receipts
         tax, and local school taxes. Taxes shall not include income,
         income-like, gross receipts on the revenue of a provider, or property
         taxes. Taxes shall not include payroll withholding taxes unless
         specifically required by statute or ordinance.

         41.2     Fees/Regulatory Surcharges - A charge imposed by a regulatory
                  authority, other agency, or resulting from a contractual
                  obligation, in which the seller is responsible or required to
                  collect the fee/surcharge from the purchaser and the seller is
                  responsible for remitting the charge to the regulatory
                  authority, other agency, or contracting party.

         Fees/Regulatory Surcharges shall include but not be limited to
         E911/911, E311/311, franchise fees, Lifeline, hearing impaired, and
         Commission surcharges.

42.      Trademarks and Trade Names. Except as specifically set out in this
         Agreement, nothing in this Agreement shall grant, suggest, or imply any
         authority for one Party to use the name, trademarks, service marks, or
         trade names of the other for any purpose whatsoever.

43.      Waiver. The failure of either Party to insist upon the performance of
         any provision of this Agreement, or to exercise any right or privilege
         granted to it under this Agreement, shall not be construed as a waiver
         of such provision or any provisions of this Agreement, and the same
         shall continue in full force and effect.

44.      Environmental Responsibility.

         44.1     GTE and DTI agree to comply with applicable federal, state and
                  local environmental and safety laws and regulations including
                  U.S. Environmental Protection Agency (EPA) regulations issued
                  under the Clean Air Act, Clean Water Act, Resource
                  Conservation and Recovery Act, Comprehensive Environmental
                  Response, Compensation and Liability Act, Superfund Amendments
                  and Reauthorization Act and the Toxic Substances Control Act
                  and OSHA regulations issued under the Occupational Safety and
                  Health Act of 1970. Each Party has the responsibility to
                  notify the other if Compliance inspections occur and/or


                                     III-11
<PAGE>   33

                  citations are issued that impact any aspect of this Agreement
                  such as occurring on a LEC Facility or involving DTI potential
                  employee exposure.

         44.2     GTE and DTI shall provide notice of known and recognized
                  physical hazards or hazardous chemicals that must include
                  providing Material Safety Data Sheets (MSDSs) for materials
                  existing on site or brought on site to the Facility. Each
                  Party is required to provide specific notice for potential
                  imminent danger conditions which could include, but is not
                  limited to, a defective utility pole or significant petroleum
                  contamination in a manhole.

         44.3     GTE will make available additional environmental control or
                  safety procedures for DTI to review and follow when working at
                  a GTE Facility. Providing these procedures, beyond government
                  regulatory Compliance requirements, is the decision of GTE.
                  These practices/procedures will represent the regular work
                  practices required to be followed by the employees and
                  contractors of GTE for safety and environmental protection.

         44.4     Any materials brought, used or remaining at the Facility by
                  DTI are owned by DTI. DTI will indemnify GTE for these
                  materials. No substantial new safety or environmental hazards
                  can be created or new hazardous materials can be used at a GTE
                  Facility. DTI must demonstrate adequate emergency response
                  capabilities for its materials used or remaining at the GTE
                  Facility.

         44.5     When Third Party contamination is discovered at a GTE
                  Facility, the Party uncovering the condition must notify the
                  proper safety or environmental authority, if required under
                  applicable laws or regulations. DTI must also notify GTE of
                  Third Party contamination it discovers at GTE facilities. The
                  cost causer (requiring access) will become the generator, as
                  owner or operator, of any waste materials such as petroleum
                  contaminated water, sewage or manhole sediment.
                  Notwithstanding Section 24 and Section 44.9 of this Article
                  III, the cost causer (requiring access) shall indemnify the
                  other Party hereunder.

         44.6     DTI should obtain and use its own environmental permits, if
                  necessary. If GTE's permit or EPA identification number must
                  be used, DTI must comply with all of GTE's environmental
                  processes including environmental "best management practices
                  (BMP)" and/or selection of disposition vendors and disposal
                  sites.

         44.7     DTI visitors must comply with GTE security, fire safety,
                  safety, environmental and building practices/codes including
                  equivalent employee training when working in GTE facilities.

         44.8     GTE and DTI shall coordinate plans or information required to
                  be submitted to government agencies, such as emergency
                  response plans and community reporting. If fees are associated
                  with filing, GTE and DTI must develop a cost sharing
                  procedure.

         44.9     Notwithstanding Section 23, with respect to environmental
                  responsibility under this Section 44, GTE and DTI shall
                  indemnify, defend and hold harmless the other party from and
                  against any claims (including, without limitation, Third Party
                  claims for personal injury or real or personal property
                  damage), judgments, damages (including direct and indirect
                  damage, and punitive damages), penalties, fines, forfeitures,
                  cost, liabilities, interest and losses proximately caused by
                  the indemnifying Party's negligent or willful misconduct
                  regardless of form, or in connection with the violation or
                  alleged violation of any applicable requirement with respect
                  to the presence or alleged presence of contamination arising
                  out of the indemnifying party's acts or omissions concerning
                  its operations at the Facility.

         44.10    Activities impacting safety or the environment of a Right of
                  Way must be harmonized with the specific agreement and the
                  relationship between GTE and the private land

                                     III-12
<PAGE>   34

                  owner. This could include limitations on equipment access due
                  to environmental conditions (e.g., wetland area with equipment
                  restrictions).

45.      TBD Prices. Numerous provisions in this Agreement and its
         Attachments refer to pricing principles. If a provision
         references prices in an Attachment and there are no corresponding
         prices in such Attachment, such price shall be considered "To Be
         Determined" (TBD). With respect to all TBD prices, prior to DTI
         ordering any such TBD item, the Parties shall meet and confer to
         establish a price. If the Parties are unable to reach agreement on a
         price for such item, an interim price shall be set for such item that
         is equal to the price for the nearest analogous item for which a price
         has been established (for example, if there is not an established price
         for a nonrecurring charge (NRC) for a specific network element, the
         Parties would use the NRC for the most analogous retail service for
         which there is an established price). Any interim prices so set shall
         be subject to modification by any subsequent decision of the
         Commission. If an interim price is different from the rate subsequently
         established by the Commission, any underpayment shall be paid by DTI to
         GTE, and any overpayment shall be refunded by GTE to DTI, within 45
         Business Days after the establishment of the price by the Commission.

46.      Amendment of Certain Rates, Terms and Conditions. The Parties agree as
         follows with respect to modification of the rates, terms and conditions
         initially provided for herein:

         The rates, terms and conditions that are specified in Appendix 45A (the
         "GTE Terms") may be replaced by the rates, terms and conditions from
         the GTE/OtherCLEC Interconnection, Resale and Unbundling Agreement (the
         "OtherCLEC Agreement"), respectively, that are specified in Appendix
         45B (the "OtherCLEC Terms") if and when the OtherCLEC Agreement becomes
         effective after approval by order of the Commission in Case No. . The
         rates, terms and conditions that are specified in Appendix 45B (the
         OtherCLEC Terms) shall not take effect for purposes of this Agreement
         until thirty (30) days following GTE's receipt of written notice of
         DTI's election to replace the specified GTE Terms with the specified
         OtherCLEC Terms, which notice may be given no earlier than the date the
         OtherCLEC Agreement is approved by the Commission and effective. GTE
         and DTI agree that if the OtherCLEC Terms are deemed to be unlawful, or
         are stayed, enjoined or otherwise modified, in whole or in part, by a
         court or commission of competent jurisdiction, then this Agreement
         shall be deemed to have been amended accordingly, by modification of
         the OtherCLEC Terms or, as appropriate, the substitution of GTE Terms
         for all stayed or enjoined OtherCLEC Terms, and such amendment shall be
         effective retroactive to the Effective Date of the OtherCLEC Terms.

         GTE and DTI further agree that the terms and conditions of this
         Agreement reflect certain requirements of the FCC's First Report and
         Order in CC Docket No. 96-98. The terms and conditions of this
         Agreement shall be subject to any and all actions by any court or other
         governmental authority that invalidate, stay, vacate or otherwise
         modify the FCC's First Report and Order, in whole or in part
         ("subsequent action"). To the extent warranted by any such subsequent
         action, the Parties agree that this Agreement shall be deemed to have
         been modified accordingly as in the first paragraph of this Section 45.
         The Parties agree to immediately apply any effected terms and
         conditions, including any in other sections and articles of this
         Agreement consistent with such subsequent action, and within a
         reasonable time incorporate such modified terms and conditions in
         writing into this Agreement. If the OtherCLEC Terms are affected by
         such subsequent action and GTE determines they cannot be consistently
         applied therewith, the GTE Terms shall apply. DTI acknowledges that GTE
         may seek to enforce such subsequent action before a commission or court
         of competent jurisdiction. GTE does not waive any position regarding
         the illegality or inappropriateness of the FCC's First Report and
         Order.


                                     III-13

<PAGE>   35

         The rates, terms and conditions (including rates which may be
         applicable under true-up) specified in both the GTE Terms and the
         OtherCLEC Terms are further subject to amendment, retroactive to the
         Effective Date of the Agreement, to provide for charges or rate
         adjustments resulting from future Commission or other proceedings,
         including but not limited to any generic proceeding to determine GTE's
         unrecovered costs (e.g., historic costs, contribution, undepreciated
         reserve deficiency, or similar unrecovered GTE costs (including GTE's
         end user surcharge)), the establishment of a competitively neutral
         universal service system, or any appeal or other litigation.

         If the Commission (or any other commission or federal or state court)
         in reviewing this Agreement pursuant to applicable state or federal
         laws, including Section 252(e) of the Telecommunications Act of 1996,
         deletes or modifies in any way this Section 46, then the Parties agree
         that they will reopen negotiations within ten (10) days after receipt
         of the final decision making such deletion or modification in order to
         attempt to craft the new provision that will provide substantially the
         same protections to GTE and DTI as this Section 46. If the Parties
         cannot reach agreement on such a provision within twenty (20) calendar
         days thereafter, the Parties agree that this entire Agreement is void
         and will not become effective, and DTI agrees to withdraw this
         Agreement from consideration by the Commission (or any other commission
         or federal or state court). In such event, each Party shall have 25
         days following the close of the 20-day negotiation period within which
         to file a petition for arbitration before the Commission under Section
         252(e) of the Telecommunications Act of 1996 of the issues that remain
         in dispute under this paragraph.

                                     III-14





<PAGE>   36
                                   ARTICLE IV
                     GENERAL RULES GOVERNING RESOLD SERVICES
                             AND UNBUNDLED ELEMENTS

1.       General. General regulations, terms and conditions governing rate
         applications, technical parameters, service availability, definitions
         and feature interactions, as described in the appropriate GTE
         intrastate local, toll and access tariffs, apply to retail services
         made available by GTE to DTI for resale and unbundled network elements
         provided by GTE to DTI, when appropriate, unless otherwise specified in
         this Agreement. As applied to services or network elements offered
         under this Agreement, the term "Customer" contained in the GTE Retail
         Tariff shall be deemed to mean "DTI" as defined in this Agreement.

2.       Liability of GTE.

         2.1      Inapplicability of Tariff Liability. GTE's general liability,
                  as described in the GTE Retail Tariff, does not extend to
                  DTI's customers or any other Third Party. Liability of GTE to
                  DTI resulting from any and all causes arising out of services,
                  facilities, network elements or any other items relating to
                  this Agreement shall be governed by the liability provisions
                  contained in this Agreement and no other liability whatsoever
                  shall attach to GTE. GTE shall be liable for the individual
                  services, facilities or elements that it separately provides
                  to DTI and shall not be liable for the integration of
                  components combined by DTI.

         2.2      DTI Tariffs or Contracts. DTI shall, in its tariffs or other
                  contracts for services provided to its end users using
                  services, facilities or network elements obtained from GTE,
                  provide that in no case shall GTE be liable to DTI's end users
                  or any third parties for any indirect, special or
                  consequential damages, including, but not limited to, economic
                  loss or lost business or profits, whether foreseeable or not,
                  and regardless of notification by DTI of the possibility of
                  such damages and DTI shall indemnify and hold GTE harmless
                  from any and all claims, demands, causes of action and
                  liabilities based on any reason whatsoever from its customers
                  as provided in this Agreement. Nothing in this Agreement shall
                  be deemed to create a third party beneficiary relationship
                  with DTI's end users.

         2.3      No Liability for Errors. GTE is not liable for mistakes that
                  appear in GTE's listings, 911 and other information databases,
                  or for incorrect referrals of end users to DTI for any ongoing
                  DTI service, sales or repair inquiries, and with respect to
                  such mistakes or incorrect referrals, DTI shall indemnify and
                  hold GTE harmless from any and all claims, demands, causes of
                  action and liabilities whatsoever, including costs, expenses
                  and reasonable attorney's fees incurred on account thereof, by
                  third parties, including DTI's end users or employees. For
                  purposes of this Section 2.3, mistakes and incorrect referrals
                  shall not include matters arising out of the willful
                  misconduct of GTE or its employees or agents.

3.       Unauthorized Changes.

         3.1      Procedures. If DTI submits an order for resold services or
                  unbundled elements under this Agreement in order to provide
                  service to an end user that at the time the order is submitted
                  is obtaining its local services from GTE or another LEC using
                  GTE resold services or unbundled elements, and the end user
                  notifies GTE that the end user did not authorize DTI to
                  provide local exchange services to the end user, DTI must
                  provide GTE with written documentation of authorization from
                  that end user within thirty (30) Business Days of notification
                  by GTE. If DTI cannot provide written documentation of
                  authorization within such time frame, DTI must within three
                  (3) Business Days thereafter:


                                      IV-1
<PAGE>   37

         (a)      notify GTE to change the end user back to the LEC providing
                  service to the end user before the change to DTI was made; and

         (b)      provide any end user information and billing records DTI has
                  obtained relating to the end user to the LEC previously
                  serving the end user; and

         (c)      notify the end user and GTE that the change back to the
                  previous LEC has been made.

         Furthermore, GTE will bill DTI fifty dollars ($50.00) per affected line
         to compensate GTE for switching the end user back to the original LEC.

         3.2      Option to Restrict Chances Without Evidence of Authorization.
                  DTI's or GTE's end users may request GTE to permit changes of
                  their provider of local exchange services only upon end user
                  written notification to GTE that the end user wishes to change
                  the end user's provider of local exchange services. In such a
                  situation, GTE will not change an end user's provider of local
                  exchange services without such written notification.

4.       Impact of Payment of Charges on Service. DTI is solely responsible for
         the payment of all charges for all services, facilities and elements
         furnished under this Agreement, including, but not limited to, calls
         originated or accepted at its or its end users' service locations. If
         DTI fails to pay when due any and all charges billed to DTI under this
         Agreement, including any late payment charges (collectively, "Unpaid
         Charges"), and any or all such charges remain unpaid more than
         forty-five (45) Business Days after the due date of such Unpaid Charges
         excepting previously disputed charges for which DTI may withhold
         payment, GTE shall notify DTI in writing that it must pay all Unpaid
         Charges to GTE within seven (7) Business Days. If DTI disputes the
         billed charges, it shall, within said seven (7) day period, inform GTE
         in writing of which portion of the Unpaid Charges it disputes,
         including the specific details and reasons for the dispute, unless such
         reasons have been previously provided, and shall immediately pay to GTE
         all undisputed charges. If DTI and GTE are unable, within thirty (30)
         Business Days thereafter, to resolve issues related to the disputed
         charges, then either DTI or GTE may file a request for arbitration
         under Article III of this Agreement to resolve those issues. Upon
         resolution of any dispute hereunder, if DTI owes payment it shall make
         such payment to GTE with any late payment charge under Article III,
         Section 7.2, from the original payment due date. If DTI owes no
         payment, but has previously paid GTE such disputed payment, then GTE
         shall credit such payment including any late payment charges. If DTI
         fails to pay any undisputed Unpaid Charges, DTI shall, at its sole
         expense, within five (5) Business Days notify its end users that their
         service may be disconnected for DTI's failure to pay Unpaid Charges,
         and that its end users must select a new provider of local exchange
         services. If DTI fails to provide such notification or any of DTI's end
         users fail to select a new provider of services within the applicable
         time period, GTE will provide local exchange services to DTI's end
         users under GTE's applicable end user tariff at the then current
         charges for the services being provided. In this circumstance,
         otherwise applicable service establishment charges will not apply to
         DTI's end user, but will be assessed to DTI. GTE may discontinue
         service to DTI upon failure to pay undisputed charges as provided in
         this Section 4, and shall have no liability to DTI or DTI's end users
         in the event of such disconnection.

5.       Unlawful Use of Service. Services, facilities or unbundled elements
         provided by GTE pursuant to this Agreement shall not be used by DTI or
         its end users for any purpose in violation of law. DTI, and not GTE,
         shall be responsible to ensure that DTI and its end users use of
         services, facilities or unbundled elements provided hereunder comply at
         all times with all applicable laws. GTE may refuse to furnish service
         to DTI or disconnect particular services, facilities or unbundled
         elements provided under this Agreement to DTI or, as appropriate, DTI's
         end user when (i) an order is issued by a court of competent
         jurisdiction finding that probable cause exists to believe that the use
         made or to be made of the service, facilities or unbundled elements is
         prohibited by 

                                      IV-2
<PAGE>   38

         law or (ii) GTE is notified in writing by a law enforcement agency
         acting within its jurisdiction that any facility furnished by GTE is
         being used or will be used for the purpose of transmitting or receiving
         gambling information in interstate or foreign commerce in violation of
         law. Termination of service shall take place after reasonable notice is
         provided to DTI, or as ordered by the court. If facilities have been
         physically disconnected by law enforcement officials at the premises
         where located, and if there is not presented to GTE the written finding
         of a court, then upon request of DTI and agreement to pay restoral of
         service charges and other applicable service charges, GTE shall
         promptly restore such service.

6.       Timing of Messages. With respect to GTE resold measured rate local
         service(s), chargeable time begins when a connection is established
         between the calling station and the called station. Chargeable time
         ends when the calling station "hangs up," thereby releasing the network
         connection. If the called station "hangs up" but the calling station
         does not, chargeable time ends when the network connection is released
         by automatic timing equipment in the network. Timing of messages
         applicable to GTE's Port and Local Switching element (usage sensitive
         services) will be recorded based on originating and terminating access.

7.       Procedures For Preordering, Ordering, Provisioning, Etc. Certain
         procedures for preordering, ordering, provisioning, maintenance and
         billing and electronic interfaces for many of these functions are
         described in Appendix I. All costs and expenses for any new or modified
         electronic interfaces DTI requires that GTE determines are technically
         feasible and GTE agrees to develop will be paid by DTI pursuant to
         Appendix I. The schedule for implementation of any new or modified
         electronic interfaces will be developed by GTE according to industry
         standards and will be based upon the amount of work needed to design,
         test and implement the new or modified interface.

8.       Customer Contacts. Except as otherwise provided in this Agreement or as
         agreed to in a separate writing by DTI, DTI shall provide the exclusive
         interface with DTI's end user customers in connection with the
         marketing or offering of DTI services. Except as otherwise provided in
         this Agreement, in those instances in which GTE personnel are required
         pursuant to this Agreement to interface directly with DTI's end users,
         such personnel shall not identify themselves as representing GTE. All
         forms, business cards or other business materials furnished by GTE to
         DTI end users shall bear no corporate name, logo, trademark or trade
         name other than DTI's. In no event shall GTE personnel acting on behalf
         of DTI pursuant to this Agreement provide information to DTI end users
         about GTE products or services.




                                      IV-3
<PAGE>   39

                                    ARTICLE V
            INTERCONNECTION AND TRANSPORT AND TERMINATION OF TRAFFIC

1.       Services Covered by This Article.

         1.1      Types of Services. This Article governs the provision of
                  internetwork facilities (i.e., physical interconnection
                  services and facilities), meet point billing by GTE to DTI or
                  by DTI to GTE and the transport and termination and billing of
                  Local, IntraLATA Toll, optional EAS traffic and jointly
                  provided Interexchange Carrier Access between GTE and DTI. The
                  services and facilities described in this Article shall be
                  referred to in this Article V as the "Services."

         1.2      Service Locations for Interconnection Services and Facilities.
                  Appendix B, Service Matrix, attached to this Agreement and
                  made a part hereof, sets forth the Services and each location
                  in the State where a Service shall be provided (the "Service
                  Locations") and the Interconnection Point ("IP") for such
                  Services.

         1.3      Additional Services or Service Locations. If, during the term
                  of this Agreement, the parties determine that additional
                  services are needed in the State, or existing Services will be
                  offered in new locations in the State, the Parties shall
                  execute an amendment to this Agreement substantially in the
                  form of Appendix C attached to this Agreement and made a part
                  hereof, incorporating the additional locations and/or any
                  additional terms necessary for the additional services. Upon
                  the effective date of the amendment, and continuing through
                  the remaining term of this Agreement, the new services shall
                  be deemed part of the Services provided pursuant to this
                  Article and/or the new locations shall be deemed part of the
                  Service Locations.

2.       Billing and Rates.

         2.1      Rates and Charges. Customer agrees to pay to Provider the
                  rates and charges for the Services set forth in the applicable
                  appendices to this Agreement. GTE's rates and charges are set
                  forth in Appendix D attached to this Agreement and made a part
                  hereof. DTI's separate rates and charges are also set forth in
                  Appendix D attached hereto and made a part hereof.

         2.2      Billing. Provider shall render to Customer a bill for
                  interconnection services on a current basis. Charges for
                  physical facilities and other nonusage sensitive charges shall
                  be billed in advance, except for charges and credits
                  associated with the initial or final bills. Usage sensitive
                  charges, such as charges for termination of Local Traffic,
                  shall be billed in arrears. DTI is required to order trunks
                  pursuant to Section 4.3.3 of this Article. Charges for traffic
                  that has been routed over a jurisdictionally inappropriate
                  trunk group (e.g., local traffic carried over trunks used for
                  Switched Access Traffic) may be adjusted to reflect the
                  appropriate compensation arrangement and may be handled as a
                  post-billing adjustment to bills rendered. Additional matters
                  relating to billing are included in Appendix I attached to
                  this Agreement and made a part hereof.

3.       Transport and Termination of Traffic.

         3.1      Traffic to be Exchanged. The Parties shall reciprocally
                  terminate Local, IntraLATA Toll, optional EAS and jointly
                  provided Interexchange Carrier Traffic originating on each
                  other's networks utilizing either Direct or Indirect Network
                  Interconnections as provided in Section 4 or Section 5 herein.
                  To this end, the Parties agree that there will be
                  interoperability between their networks. The Parties agree to
                  exchange traffic associated with Third-Party 




                                      V-1

<PAGE>   40

                  LECs, CLECs and Wireless Service Providers pursuant to the
                  compensation arrangement specified in Section 3.3 herein. Only
                  traffic originated by or terminating to the Parties' end user
                  customers is to be exchanged. In addition, the Parties will
                  notify each other of any anticipated change in traffic to be
                  exchanged (e.g., traffic type, volume).

         3.2      Compensation For Exchange Of Traffic.

                  3.2.1    Mutual Compensation. The Parties shall compensate
                           each other for the exchange of Local Traffic in
                           accordance with Section 3.2.2 of this Article. The
                           Parties will develop an initial factor representative
                           of the share of traffic exempt from local
                           compensation. This factor will be updated quarterly
                           in like manner or as the Parties otherwise agree.
                           Once the traffic that is exempt from local
                           compensation can be measured, the actual exempt
                           traffic will be used rather than the above factor.
                           Charges for the transport and termination of
                           intraLATA toll and interexchange traffic shall be in
                           accordance with the Parties' respective intrastate or
                           interstate access tariffs, as appropriate

                  3.2.2    Bill-and-Keep. The Parties shall assume that Local
                           Traffic is roughly balanced between the parties
                           unless traffic studies indicate otherwise.
                           Accordingly, the Parties agree to use a
                           Bill-and-Keep Arrangement with respect to
                           termination of Local Traffic only. Either Party may
                           request that a traffic study be performed no more
                           frequently than once a quarter.  Should such
                           traffic study indicate, in the aggregate, that
                           either Party is terminating more than 60 percent of
                           the Parties' total terminated minutes for Local
                           Traffic, either Party may notify the other that
                           mutual compensation will commence pursuant to the
                           rates set forth in Appendix D of this  Agreement and
                           following such notice it shall begin and continue
                           for the duration of the Term of this Agreement
                           unless otherwise agreed. To account for ISP traffic,
                           the Parties will negotiate an initial factor(s)
                           representative of the proportionate share of traffic
                           exempt from local compensation. This factor will be
                           updated quarterly in a like manner or as the Parties
                           otherwise agree. Once the traffic that is exempt
                           from local compensation can be measured, the actual
                           exempt traffic will be used rather than the above
                           factor. Nothing in this Section 3.2.2 shall be
                           interpreted to (i) change compensation set forth in
                           this Agreement for traffic or services other than
                           Local Traffic, including but not limited to
                           internetwork facilities, access traffic or wireless
                           traffic, or (ii) allow either Party to aggregate
                           traffic other than Local Traffic for the purpose of
                           compensation under the Bill-and-Keep Arrangement
                           described in this Section 3.2.2, except as set forth
                           in Section 3.1 above.

                  3.2.3    Sharing of Access Charges on Calls to Ported Numbers.
                           Until permanent number portability is implemented,
                           the Parties agree that switched access termination to
                           a ported number will be billed by the party providing
                           interim number portability and that the party billing
                           the switched access will share the switched access
                           revenue with the other party. After permanent number
                           portability is implemented, the Parties agree to
                           renegotiate sharing of access charges to ported
                           numbers in accordance with permanent number
                           portability requirements. In lieu of actual
                           measurements of minutes and/exchange of billing
                           records for this traffic the Parties agree that the
                           Party providing the ported number will pay the other
                           Party the rate per line/per month as specified in
                           Appendix E.

                           (a)      The number of lines/talk paths per ported
                                    number that are subject to compensation will
                                    be determined at the time the end user
                                    customer's local service is changed from one
                                    party to the other. The number of lines per
                                    number eligible for the shared revenue
                                    arrangement described 



                                      V-2
<PAGE>   41

                                    in this section will be limited to the
                                    number of lines in service on the date of
                                    conversion plus a 10% growth margin. After
                                    conversion the number of lines per number
                                    available for compensation can only be
                                    increased by mutual consent of the parties.

                           (b)      The Parties agree that the compensation rate
                                    in paragraph 3.3.3 may change as a result of
                                    changes in access rates, traffic volume or
                                    for other reasons and agree to renegotiate
                                    the rate if a significant event occurs. At a
                                    minimum, the parties agree to reevaluate the
                                    rate on an annual basis.

                           (c)      The Parties agree that terminating switched
                                    access calls ported via interim number
                                    portability may appear to the receiving
                                    party to be a local call and that the
                                    implementation of reciprocal compensation
                                    for terminating local calls may result in
                                    overcompensation for ported switched access
                                    calls. Therefore, the Parties agree to
                                    renegotiate the terminating shared access
                                    compensation rate if reciprocal compensation
                                    for local calls is implemented.

         3.3      Tandem Switching Traffic. The Parties will provide tandem
                  switching for traffic between the Parties' end offices
                  subtending each other's access tandem, as well as for traffic
                  between either Party's end users and any Third Party which is
                  interconnected to the other Party's access tandems as follows:

                  3.3.1    The originating Party will compensate the tandem
                           Party for each minute of originated tandem switched
                           traffic which terminates to Third Party (e.g., other
                           CLEC, ILEC, or wireless service provider). The
                           applicable rate for this charge is identified in
                           Appendix D.

                  3.3.2    The originating Party also assumes responsibility for
                           compensation to the company which terminates the
                           call.

         3.4      Inter-Tandem Switching. The Parties will only use inter-tandem
                  switching for the transport and termination of local/EAS or
                  intraLATA toll traffic originating on each other's network at
                  and after such time as either (I) DTI has agreed to and fully
                  implemented an existing intraLATA toll compensation mechanism
                  such as IntraLATA Terminating Access Compensation (ITAC) or a
                  functional equivalent thereof or (ii) generally accepted
                  industry signaling standards and AMA record standards support
                  the recognition of multiple tandem switching events.

4.       Direct Network Interconnection.

         4.1      Network Interconnection Architecture. DTI may interconnect
                  with GTE at any of the minimum technically feasible points
                  required by the FCC. Interconnection at additional points will
                  be reviewed on an individual case basis. Where the Parties
                  mutually agree following a Bona Fide Request to directly
                  interconnect their respective networks, interconnection will
                  be as specified in the following subsections. The "IPs" shall
                  be set forth in Appendix B attached to this Agreement and made
                  a part hereof. Based on the configuration, the installation
                  timeline will vary considerably, however, GTE will work with
                  DTI in all circumstances to install "IPs" within 120 calendar
                  days absent extenuating circumstances. Internetwork connection
                  and protocol must be based on industry standards developed
                  consistent with Section 256 of the Telecommunications Act of
                  1996.



                                      V-3
<PAGE>   42

                  4.1.1    Subject to mutual agreement, the Parties may use the
                           following types of network facility interconnection,
                           using such interface media as are (I) appropriate to
                           support the type of interconnection requested and
                           (ii) available at the facility at which
                           interconnection is requested. For each "IP" set forth
                           in Appendix B, the Parties shall specify the type of
                           interconnection used at that "IP."

                           (a)      A Mid-Span Fiber Meet within an existing GTE
                                    exchange area whereby the Parties mutually
                                    agree to jointly plan and engineer their
                                    facility "IP" at a designated manhole or
                                    junction location. The "IP" is the
                                    demarcation between ownership of the fiber
                                    transmission facility. Each party is
                                    individually responsible for its incurred
                                    costs in establishing this arrangement.

                           (b)      A Virtual or Physical EIS arrangement at a
                                    GTE wire center subject to the rates, terms,
                                    and conditions contained in GTE's applicable
                                    tariffs.

                           (c)      A Special Access arrangement and/or Switched
                                    Transport terminating at a GTE wire center
                                    subject to the rates, terms, and conditions
                                    contained in GTE's applicable tariffs. These
                                    facilities will meet the standards set forth
                                    in such tariffs.

                  4.1.2    Virtual and Physical EIS arrangements are governed by
                           appropriate GTE tariffs, except as provided in
                           Article IX, Section 1.3.

                  4.1.3    The Parties will mutually designate at least one POI
                           on GTE's network within each GTE local calling area
                           for the routing of Local Traffic. Recording and
                           billing of traffic routed over these facilities shall
                           be as provided in Section 3.4 of this Article.

         4.2      Compensation. The Parties agree to the following compensation
                  for internetwork facilities, depending on facility type.

                  4.2.1    Mid-Span Fiber Meet: GTE will charge special access
                           (flat rated) transport from the applicable intrastate
                           access tariff and will rate charges between the "IP"
                           and GTE's interconnection switch. Charges will be
                           reduced to reflect the proportionate share of the
                           facility that is used for transport of traffic
                           originated by GTE. DTI will charge flat rated
                           transport to GTE for DTI facilities used by GTE at
                           their tariffed rates or as mutually agreed, not to
                           exceed GTE rates. DTI will apply charges based on the
                           lesser of; (i) the airline mileage from the "IP" to
                           the DTI switch; or (ii) the airline mileage from the
                           GTE switch to the serving area boundary.

                  4.2.2    Collocation: GTE will charge Virtual or Physical EIS
                           rates from the applicable GTE tariff. DTI will charge
                           GTE flat rated transport at their tariffed rates or
                           as mutually agreed, not to exceed GTE rates, to
                           reflect the proportionate share of the facility that
                           is used for transport of traffic originated by GTE.
                           DTI will apply charges based on the lesser of; (I)
                           the airline mileage from the "IP" to the DTI switch;
                           or (ii) two (2) times the airline mileage from the
                           GTE switch to the serving area boundary.

                  4.2.3    Special Access and/or Switched Access: GTE will
                           charge special access and/or switched access rates
                           from the applicable GTE intrastate access tariff.
                           Charges will be reduced to reflect the proportionate
                           share of the facility that is used for transport of
                           traffic originated by GTE. The Parties will negotiate
                           an initial factor representative of the proportionate
                           share of the facilities. This factor will be updated
                           quarterly in like manner or as the Parties otherwise
                           agree.


                                      V-4
<PAGE>   43

         4.3      Trunking Requirements.

                  4.3.1    The Parties agree to establish trunk groups of
                           sufficient capacity from the interconnecting
                           facilities such that trunking is available to any
                           switching center designated by either Party,
                           including end offices, tandems, 911 routing switches,
                           and directory assistance/operator service switches.
                           The Parties will mutually agree where one-way or
                           two-way trunking will be available. The Parties may
                           use two-way trunks for delivery of local traffic or
                           either Party may elect to provision its own one-way
                           trunks for delivery of local traffic to the other
                           Party. If a Party elects to provision its own one-way
                           trunks, that Party will be responsible for its own
                           expenses associated with the trunks.

                  4.3.2    DTI shall make available to GTE trunks over which GTE
                           shall terminate to end users of DTI-provided Exchange
                           Services, Local Traffic and intraLATA toll or
                           optional EAS traffic originated from end users of
                           GTE-provided Exchange Service.

                  4.3.3    DTI and GTE shall, where applicable, make
                           reciprocally available, by mutual agreement, the
                           required trunk groups to handle different traffic
                           types. DTI and GTE will support the provisioning of
                           trunk groups that carry combined or separate Local
                           Traffic and intraLATA toll and optional EAS traffic.
                           GTE requires separate trunk groups from DTI to
                           originate and terminate interLATA calls and to
                           provide Switched Access Service to IXCs. To the
                           extent DTI desires to have any Interexchange Carriers
                           (IC) originate or terminate traffic to DTI, DTI will
                           arrange for such IC to issue an ASR to GTE
                           instructing GTE to route such traffic over the
                           appropriate IC trunk group. Until GTE receives and
                           processes such ASR, the traffic will not be routed.

                           4.3.3.1    Each Party agrees to route traffic only
                                      over the proper jurisdictional trunk
                                      group.

                           4.3.3.2    Each Party shall only deliver traffic over
                                      the local interconnection trunk groups to
                                      the other Party's access tandem for those
                                      publicly-dialable NXX Codes served by end
                                      offices that directly subtend the access
                                      tandem or to those wireless service
                                      providers that directly subtend the access
                                      tandem.

                           4.3.3.3    Neither party shall route Switched Access
                                      Service traffic over local interconnection
                                      trunks, or local traffic over Switched
                                      Access Service trunks.

                  4.3.4    DTI and GTE will reciprocally provide Percent Local
                           Usage (PLU) factors to each other on a quarterly
                           basis to identify the proper jurisdiction of each
                           call type that is carried over the required trunks.

                  4.3.5    Reciprocal traffic exchange arrangement trunk
                           connections shall be made at a DS-1 or multiple DS-1
                           level, DS-3, (SONET where technically available) and
                           shall be jointly-engineered to an objective P.01
                           grade of service.

                  4.3.6    DTI and GTE agree to use diligent efforts to develop
                           and agree on a Joint Interconnection Grooming Plan
                           prescribing standards to ensure that the reciprocal
                           traffic exchange arrangement trunk groups are
                           maintained at consistent P.01 or better grades of
                           service. Such plan shall also include mutually-agreed
                           upon default standards for the configuration of all
                           segregated trunk groups.

                                      V-5
<PAGE>   44

                  4.3.7    Signaling System 7 (SS7) Common Channel Signaling
                           will be used to the extent that such technology is
                           available.

                  4.3.8    The Parties agree to offer and provide to each other
                           B8ZS Extended Superframe Format ("ESF") facilities,
                           where available, capable of voice and data traffic
                           transmission.

                  4.3.9    The Parties will support intercompany 64kbps clear
                           channel where available.

         4.4      Network Redesigns Initiated by GTE. GTE will not charge DTI
                  when GTE initiates its own network redesigns/reconfigurations.

         4.5      Interconnection Calling and Called Scopes for the Access
                  Tandem Interconnection and the End Office Interconnection.

                  4.5.1    GTE Access Tandem Interconnection calling scope
                           (originating and terminating) is to those GTE end
                           offices which subtend the GTE access tandem to which
                           the connection is made except as provided for in
                           Section 3.3 of this Article V.

                  4.5.2    GTE End Office Interconnection calling scope
                           (originating and terminating) is only to the end
                           office to which the connection is made.

5.       Indirect Network Interconnection. Nether Party shall deliver traffic
         destined to terminate at the other Party's end office via another LEC's
         end office. In addition, neither Party shall deliver traffic destined
         to terminate at an end office subtending the other Party's access
         tandem via another LEC's access tandem until such time as compensation
         arrangements have been established in accordance with this Article V,
         Sections 3.1 and 3.4.

6.       Number Resources.

         6.1      Number Assignment. Nothing in this Agreement shall be
                  construed to, in any manner, limit or otherwise adversely
                  impact DTI's right to employ or to request and be assigned any
                  NANP number resources including, but not limited to, Central
                  Office (NXX) Codes pursuant to the Central Office Code
                  Assignment Guidelines. Any request for numbering resources by
                  DTI shall be made directly to the NANP Number Plan
                  Administrator. Except with respect to those areas in which GTE
                  is the NANP Number Plan Administrator, GTE shall not be
                  responsible for the requesting or assignment of number
                  resources to DTI. The Parties agree that disputes arising from
                  numbering assignment shall be arbitrated by the NANP Number
                  Plan Administrator. DTI shall not request number resources to
                  be assigned to any GTE switching entity.

                  6.1.1    Each Party shall be responsible for notifying its
                           customers of any changes in numbering or dialing
                           arrangements to include changes such as the
                           introduction of new NPAs or new NXX codes. Each Party
                           is responsible for administering NXX codes assigned
                           to it.

         6.2      Rate Centers. For purposes of compensation between the Parties
                  and the ability of GTE to appropriately apply its toll tariff
                  to its end user customers, DTI shall adopt the Rate Center
                  areas and Rate Center points that the Commission has approved
                  for the incumbent LEC and shall assign whole NPA-NXX codes to
                  each Rate Center.

         6.3      Routing Points. DTI will also designate a Routing Point for
                  each assigned NXX code. DTI may designate one location within
                  each Rate Center as a Routing Point for the NPA-NXX associated
                  with that Rate Center; alternatively DTI may designate a
                  single location within 



                                      V-6
<PAGE>   45

                  one Rate Center to serve as the Routing Point for all the
                  NPA-NXXs associated with that Rate Center and with one or more
                  other Rate Centers served by DTI within an existing GTE
                  exchange area and LATA.

         6.4      Code and Numbers Administration. The Parties will comply with
                  code administration requirements as prescribed by the FCC, the
                  Commission, and accepted industry guidelines. Where GTE is the
                  NANP Number Plan Administrator, GTE will administer number
                  resources, and charge for such administration in accord with
                  applicable rules and regulations. GTE will administer
                  numbering resources in a competitively neutral manner, and
                  process requests for NXX codes in a timely manner and in
                  accord with industry standards. The Parties shall protect DTI
                  proprietary information that may be submitted to GTE in
                  connection with GTE's responsibilities as NANP Number Plan
                  Administrator in accordance with Article III, Section 11 of
                  this Agreement.

6.5      Programming Switches. It shall be the responsibility of each Party to
         program and update its own switches and network systems pursuant to the
         Local Exchange Routing Guide ("LERG") guidelines to recognize and route
         traffic to the other Party's assigned NXX codes at all times. Neither
         Party shall impose any fees or charges whatsoever on the other Party
         for such activities.

7.       Interim Number Portability (INP). Each Party shall provide the other
         Party with INP for the purpose of allowing end user customers to change
         service-providing Parties without changing their telephone number. GTE
         shall provide its INP to DTI using remote call forwarding ("RCF"). The
         GTE rates for INP service using RCF are set out in Appendix E attached
         to this Agreement and made a part hereof. If DTI wishes to use Direct
         Inward Dialing ("DID") to provide INP to its end users, DTI may
         purchase DID service from GTE at the rate specified in the appropriate
         GTE tariff. DTI shall provide INP to GTE at the rates specified for DTI
         in Appendix E.

8.       Meet-Point Billing.

8.1      Meet-Point Arrangements.

         8.1.1    The Parties may mutually establish Meet-Point Billing ("MPB")
                  arrangements in order to provide Switched Access Services to
                  Access Service customers via a GTE access tandem in accordance
                  with the MPB guidelines adopted by and contained in the
                  Ordering and Billing Forum's MECAB and MECOD documents, except
                  as modified herein and as described in Section 3.2.3 for
                  Interim Portability.

         8.1.2    Except in instances of capacity limitations, GTE shall permit
                  and enable DTI to sub-tend the GTE access tandem(s) nearest to
                  the DTI Rating Point(s) associated with the NPA-NXX(s) to/from
                  which the Switched Access Services are homed. In instances of
                  capacity limitation at a given access tandem, DTI shall be
                  allowed to subtend the next-nearest GTE access tandem in which
                  sufficient capacity is available.

         8.1.3    Interconnection for the MPB arrangement shall occur at the
                  "IP".

         8.1.4    Common Channel Signaling shall be utilized in conjunction with
                  MPB arrangements to the extent such signaling is resident in
                  the GTE access tandem switch.

         8.1.5    DTI and GTE will use diligent efforts, individually and
                  collectively, to maintain provisions in their respective
                  federal and state access tariffs, and/or provisions within the
                  National Exchange Carrier Association ("NECA") Tariff No. 4,
                  or any successor tariff, sufficient to reflect this MPB
                  arrangement, including MPB percentages.

                                      V-7
<PAGE>   46

         8.1.6    As detailed in the MECAB document, DTI and GTE will, in a
                  timely fashion, exchange all information necessary to
                  accurately, reliably and promptly bill Access Service
                  customers for Switched Access Services traffic jointly handled
                  by DTI and GTE via the meet-point arrangement. Information
                  shall be exchanged in Electronic Message Record ("EMR")
                  format, on magnetic tape or via a mutually acceptable
                  electronic file transfer protocol.

         8.1.7    DTI and GTE shall work cooperatively to coordinate rendering
                  of Meet-Point bills to customers, and shall reciprocally
                  provide each other usage data and related information at the
                  appropriate charge.

8.2      Compensation.

         8.2.1    Initially, billing to Access Service customers for the
                  Switched Access Services jointly provided by DTI and GTE via
                  the MPB arrangement shall be according to the multiple-bill
                  method as described in the MECAB guidelines. This means each
                  Party will bill the portion of service they provided at their
                  appropriate tariff, or price list.

         8.2.2    Subsequently, DTI and GTE may mutually agree to implement one
                  of the following options for billing to third parties for the
                  Switched Access Services jointly provided by DTI and GTE via
                  the MPB arrangement: single-bill/single tariff method,
                  single-bill/multiple tariff method, or to continue the
                  multiple-bill method. Should either Party prefer to change
                  among these billing methods, that Party shall notify the other
                  Party of such a request in writing, ninety (90) Business Days
                  in advance of the date on which such change is desired to be
                  implemented, such changes then may be made in accordance with
                  MECAB guidelines and if the Parties mutually agree, the change
                  will be made.

9.       Common Channel Signaling.

9.1      Service Description. The Parties will provide Common Channel Signaling
         ("CCS") to one another via Signaling System 7 ("SS7") network
         interconnection, where and as available, in the manner specified in FCC
         Order 95-187, in conjunction with all traffic exchange trunk groups.
         SS7 signaling and transport services shall be provided by GTE in
         accordance with the terms and conditions of this Section 9 of this
         Article and Appendix J attached to this Agreement and made a part
         hereof. The Parties will cooperate on the exchange of all appropriate
         SS7 messages for local and intraLATA call set-up signaling, including
         ISUP and Transaction Capabilities Application Part ("TCAP") messages to
         facilitate full interoperability of all CLASS Features and functions
         between their respective networks. Any other SS7 message services to be
         provided using TCAP messages (such as data base queries) will be
         jointly negotiated and agreed upon.

9.2      Signaling Parameters. All SS7 signaling parameters will be provided in
         conjunction with traffic exchange trunk groups, where and as available.
         These parameters include Automatic Number Identification ("ANI"),
         Calling Party Number ("CPN"), Privacy Indicator, calling party category
         information, originating line information, charge number, etc. Also
         included are all parameters relating to network signaling information,
         such as Carrier Information Parameter ("CIP"), wherever such
         information is needed for call routing or billing. GTE will provide SS7
         via GR-394-SS7 and/or GR-317-SS7 format(s).

9.3      Privacy Indicators. Each Party will honor all privacy indicators as
         required under applicable law.

9.4      Connection Through STP. DTI must interconnect with the GTE STP(s)
         serving the LATA in which the traffic exchange trunk groups are
         interconnected. Additionally, all interconnection to GTE's 800/888
         database and GTE's LIDB shall, consistent with this section and
         Appendix J attached hereto, take place only through appropriate STP
         pairs.


                                      V-8
<PAGE>   47

9.5      Third Party Signaling Providers. DTI may choose a third-party SS7
         signaling provider to transport messages to and from the GTE SS7
         network. In that event, that third-party provider must present a letter
         of agency to GTE, prior to the testing of the interconnection,
         authorizing the Third Party to act on behalf of DTI in transporting SS7
         messages to and from GTE. The third-party provider must interconnect
         with the GTE STP(s) serving the LATA in which the traffic exchange
         trunk groups are interconnected.

9.6      Multi-Frequency Signaling. In the case where CCS is not available, in
         band Multi-Frequency ("MF"), wink start, E & M channel associated
         signaling with ANI will be provided by the Parties. Network signaling
         information, such as CIC/OZZ, will be provided wherever such
         information is needed for call routing or billing.

10.      Service Quality and Performance. Each Party shall provide Services
         under this Article to the other Party that are equal in quality to that
         the Party provides to itself, its Affiliates or any other entity.
         "Equal in quality" shall mean that the Service will meet the same
         technical criteria and performance standards that the providing Party
         uses within its own network for the same Service at the same location
         under the same terms and conditions.

11.      Network Outages. GTE shall work with DTI to establish reciprocal
         responsibilities for managing network outages and reporting. Each party
         shall be responsible for network outage as a result of termination of
         its equipment in GTE wire center or access tandem. DTI shall be
         responsible for notifying GTE of significant outages which could impact
         or degrade GTE switches and services.


                                      V-9
<PAGE>   48

                                   ARTICLE VI
                               RESALE OF SERVICES

1.       General. The purpose of this Article VI is to define the Exchange
         Services and related Vertical Features and other Services (collectively
         referred to for purposes of this Article VI as the "Services") that may
         be purchased from GTE and resold by DTI and the terms and conditions
         applicable to such resold Services. Except as specifically provided
         otherwise in this Agreement, provisioning of Exchange Services for
         resale will be governed by the GTE Guide. GTE will make available to
         DTI for resale any Telecommunications Service that GTE currently
         offers, or may offer hereafter, on a retail basis to subscribers that
         are not telecommunications carriers, except as qualified by Section 2.2
         below.

2.       Terms and Conditions.

2.1      Quality and Performance. GTE shall provide Services to DTI that are
         equal in quality and performance standards to the same Services
         provided by GTE to its own end user customers.

2.2      Restrictions on Resale. The following restrictions shall apply to the
         resale of retail services by DTI.

         2.2.1    DTI shall not resell Basic Exchange Residential Service

         2.2.2    DTI shall not resell to one class of customers a service that
                  is offered by GTE only to another class of customers in
                  accordance with State requirements (e.g., R-1 to B-1, disabled
                  services or Lifeline services to non-qualifying customers).

         2.2.3    DTI shall not resell public pay telephone lines.

         2.2.4    DTI shall not resell semi-public pay telephone lines.

2.3      Restrictions on Discount of Retail Services. The discount specified in
         Section 5.3 herein shall apply to all retail services except for the
         following:

         2.3.1    DTI shall resell services that are provided at a volume
                  discount in accordance with terms and conditions of applicable
                  tariff. DTI shall not aggregate end user traffic in order to
                  qualify for volume discount.

         2.3.2    DTI shall resell ICB/Contract services without a discount and
                  only to end user customers that already have such services.

         2.3.3    DTI shall resell COCOT coin or coinless line but no discount
                  applies.

         2.3.4    DTI shall resell Lifeline services and services for the
                  disabled but no discount shall apply and they shall only be
                  resold to end user customers who qualify under GTE's tariffs
                  and state/Commission rules, orders and regulations.

         2.3.5    DTI shall resell special access but no discount applies.

         2.3.6    DTI shall resell Operator Services and Directory Assistance as
                  specified in Section 5.6 herein however no discount applies.



                                      VI-1
<PAGE>   49

         2.3.7    DTI shall resell promotional offerings that are ninety (90)
                  days or less in duration without a discount.

2.4      Resale to Other Carriers. Services available for resale may not be used
         by DTI to provide access to the local network as an alternative to
         tariffed switched and special access by other carriers, including, but
         not limited to; interexchange carriers, wireless carriers, competitive
         access providers, or other retail telecommunications providers.

3.       Ordering and Billing.

3.1      Local Service Request. Orders for resale of Services will be placed
         utilizing a standard Local Service Request ("LSR") form. GTE will
         continue to participate in industry forums for developing service
         order/disconnect order formats and will incorporate appropriate
         industry standards. A complete and accurate LSR (containing the
         requisite end user information as described in the Guide) must be
         provided by DTI before a request can be processed.

3.2      Certificate of Operating Authority. When ordering, DTI must represent
         and warrant to GTE that it is a certified provider of local dial-tone
         service. DTI will provide a copy of its Certificate of Operating
         Authority or other evidence of its status to GTE upon request.

3.3      Letter of Authorization. A Letter of Authorization ("LOA") will be
         required before resold Services will be provided in cases in which the
         subscriber currently receives Exchange Service from GTE or from a local
         service provider other than DTI. Such LOA may be a blanket LOA or such
         other form as agreed upon between GTE and DTI. GTE will not release
         information to DTI on GTE end user customer accounts unless DTI first
         provides to GTE a written LOA, signed by the end user customer,
         authorizing the release of such information to DTI or if state or
         federal law provides otherwise, in accordance with such law.

3.4      Directory Assistance Listings. GTE shall include a DTI customer listing
         in its Directory Assistance database as part of the Local Service
         Request ("LSR") process. GTE will honor DTI Customer's preferences for
         listing status, including non-published and unlisted, as noted on the
         LSR and will enter the listing in the GTE database which is used to
         perform Directory Assistance functions as it appears on the LSR.

3.5      Nonrecurring Charges. DTI shall be responsible for the payment of all
         nonrecurring charges ("NRCs") applicable to resold Services (e.g.,
         installation, changes, ordering charges) in accordance with the
         appropriate tariff. No discount applies to nonrecurring charges.

3.6      Transfers Between DTI and Another Reseller of GTE Services. When DTI
         has obtained an end user customer from another reseller of GTE
         services, DTI will inform GTE of the transfer by submitting a standard
         LSR to GTE.

3.7      Local Calling Detail. Except for those Services and in those areas
         where measured rate local service is available to end users, monthly
         billing to DTI does not include local calling detail. However, DTI may
         request and GTE shall consider developing the capabilities to provide
         local calling detail in those areas where measured local service is not
         available for a mutually agreeable charge.

3.8      Procedures. An overview of the procedures for preordering, ordering,
         provisioning and billing for resold services are outlined in Appendix
         I, attached hereto and made a part hereof.

3.9      LIDB. For resale services, GTE's service order will generate updates to
         the LIDB for validation of calling card, collect, and third number
         billed calls.


                                      VI-2
<PAGE>   50

3.10     "OLN". Upon request, GTE will update the database to provide
         Originating Line Number ("OLN") Screening which indicates to an
         operator the acceptable billing methods for calls originating from the
         calling number (e.g., penal institutions, COCOTS).

4.       Maintenance.

4.1      Maintenance, Testing and Repair. GTE will provide repair and
         maintenance services to DTI and its end user customers for resold
         Services in accordance with the same standards and charges used for
         such services provided to GTE end user customers. GTE will not initiate
         a maintenance call or take action in response to a trouble report from
         a DTI end user until such time as trouble is reported to GTE by DTI.
         DTI must provide to GTE all end user information necessary for the
         installation, repair and servicing of any facilities used for resold
         Services according to the procedures described in the Guide.

4.2      Specifics and Procedures for Maintenance. An overview of the procedures
         for maintenance of resold services and additional matters agreed to by
         the Parties concerning maintenance are set forth in Appendix I.

5.       Services Available for Resale.

5.1      Description of Local Exchange Services Available for Resale. Resold
         basic Exchange Service includes, but is not limited to, the following
         elements:

         (a)      Voice Grade Local Exchange Access Line - includes a telephone
                  number and dial tone.

         (b)      Local Calling - at local usage measured rates if applicable to
                  the end user customer.

         (c)      Access to long distance carriers

         (d)      E-911 Emergency Dialing

         (e)      Access to Service Access Codes - e.g., 800, 888, 900

         (f)      Use of AIN Services (those currently available to end users)

         (g)      End User Private Line Services

         (h)      Listing of telephone number in appropriate "white pages"
                  directory; and

         (i)      Copy of "White Pages" and "Yellow Pages" directories for the
                  appropriate GTE service area

5.2      List of Services Available for Resale. The type of Services listed on
         Appendix F, attached hereto and made a part of this Agreement, are
         available for resale by DTI. Subject to the limitations on resale
         enumerated in this Article, any new services that GTE offers in the
         future at retail to customers who are not telecommunications carriers
         shall also be available to DTI for resale under the same terms and
         conditions contained in this Agreement. Additional regulations, terms
         and conditions relating to the type of Services listed on Appendix F
         can be found in the appropriate intrastate local, toll and access
         tariffs. Terms, conditions and other matters concerning rate
         applications, technical parameters, provisioning capability,
         definitions and feature interactions contained in such tariffs are
         applicable to the type of Services offered under this Agreement and are
         incorporated herein by reference. Modifications to Services listed on
         Appendix F shall be provided to DTI in accordance with GTE's practices
         and procedures.

                                      VI-3
<PAGE>   51

5.3      Rates. The prices charged to DTI for Local Services shall be calculated
         as follows:

         (1)      Avoided Cost Discount of 10.93% shall apply to all retail
                  services except those services listed in Section 2.2 and
                  Section 2.3 herein.

         (2)      The discount dollar amount calculated under Step 1 above will
                  be deducted from the retail rate.

         (3)      The resulting rate is the Wholesale Rate.

         (4)      This discount dollar amount in Step 2 above shall not change
                  during the Term of this Agreement, even though GTE may change
                  its retail rates.

5.4      Grandfathered Services. Services identified in GTE Tariffs as
         grandfathered in any manner are available for resale only to end user
         customers that already have such grandfathered service. An existing end
         user customer may not move a grandfathered service to a new service
         location.

5.5      Access. GTE retains all revenue due from other carriers for access to
         GTE facilities, including both switched and special access charges.

5.6      Operator Services (OS) and Directory Assistance (DA). Where GTE
         provides access to GTE Operator Services for local and toll assistance
         (for example, call completion, busy line verification and emergency
         interruption) and Directory Assistance (e.g., 411 calls routed to GTE's
         DA operator centers) as an element of Exchange Services offered for
         resale, DTI will be billed in accordance with Appendix F. GTE will
         provide its existing OS and DA to a DTI at the same quality and in a
         nondiscriminatory manner as the service GTE's end users receive.

         5.6.1    Where Customized Routing is available (pursuant to Article
                  VII, Section 12.1), GTE will offer unbranded OS and DA or
                  rebranded OS and DA with the DTI brand. GTE will provide such
                  unbranding or rebranding on a switch-by-switch basis, subject
                  to capability and capacity limitations. Upon receipt of an
                  order for unbranding or rebranding, GTE will implement within
                  90 Business Days when technically capable.

         5.6.2    DTI will be billed for unbranding or rebranding and Customized
                  Routing. Upon written request from DTI, GTE will provide DTI
                  with terms and conditions for providing Customized Routing and
                  branding, plus the applicable charges. In addition, a port and
                  dedicated trunk facilities are required as specified in
                  Article VII, Section 12.1.4.

         5.6.3    For those offices that DTI has requested GTE to rebrand and/or
                  unbrand OS and DA, GTE will provide it using live operators
                  where GTE performs its own OS and DA service and where handled
                  by automated systems. If GTE uses a Third Party contractor to
                  provide OS or DA, GTE will not provide branding nor will GTE
                  negotiate it with a Third Party on behalf of DTI. DTI must
                  negotiate with the Third Party. In these instances, DTI will
                  need to purchase customized routing to differentiate OS/DA
                  traffic between GTE's and a Third Party.




                                      VI-4



<PAGE>   52

                                   ARTICLE VII
                           UNBUNDLED NETWORK ELEMENTS

1.       General. The purpose of this Article VII is to define the unbundled
         network elements that may be leased by DTI from GTE. Unless otherwise
         specified in this Agreement, provisioning of unbundled network
         arrangements will be governed with the GTE Customer Guide for DTI
         Establishment of Services - Resale and Unbundling (the "Guide").
         Additional procedures for preordering, ordering, provisioning and
         billing of unbundled network elements are outlined in Appendix I.

2.       Unbundled Network Elements.

2.1      Categories. There are several separate categories of Network Components
         that shall be provided as unbundled network elements by GTE:

         (a)      Network Interface Device or NID

         (b)      Loop Elements

         (c)      Port and Local Switching Elements

         (d)      Transport Elements

         (e)      Signaling Elements

         (f)      Data Switching

         (g)      Digital Cross Connect System (DCS)

2.2      Prices. Individual unbundled network elements and prices are identified
         on Appendix G attached to this Agreement and made a part hereof, or
         under the appropriate GTE tariff as referenced in this Article.
         Nonrecurring charges relating to unbundled elements are also listed on
         Appendix G.

         2.2.1    Reciprocal Compensation Arrangements for Call Termination.
                  Reciprocal compensation arrangements for call termination
                  shall be as provided in Appendix M attached hereto.

2.3      Interconnection to Unbundled Elements. DTI may lease and interconnect
         to whichever of these unbundled network elements DTI chooses, and
         subject to technical feasibility, may combine these unbundled elements
         with any facilities or services that DTI may itself provide subject to
         the following:

         2.3.1    Interconnection shall be achieved via expanded
                  interconnection/collocation arrangements DTI shall maintain at
                  the wire center at which the unbundled services are resident.

         2.3.2    DTI may order transport pursuant to Section 6 below as
                  follows:

                  (a)      From the wire center at which the unbundled elements
                           (e.g., loop, port) are located to the GTE wire center
                           where DTI has established an
                           interconnection/collocation arrangement.

                                     VII-1
<PAGE>   53

                  (b)      Directly from the DTI switch to a GTE wire center and
                           connect to unbundled loops. Applicable charges would
                           be transport, transport termination, multiplexing,
                           loop/port connector and loop.

         2.3.3    Each loop or port element shall be delivered to DTI
                  collocation arrangement over a loop/port connector applicable
                  to the unbundled services as listed on Appendix G.

         2.3.4    DTI shall combine unbundled network elements with its own
                  facilities. GTE has no obligation to combine any network
                  elements for DTI. DTI may not combine such network elements to
                  provide solely interexchange service or solely access service
                  to an interexchange carrier.

2.4      Service Quality. To the degree reasonably possible, all service
         attributes, grades-of-service and installation, maintenance and repair
         intervals which apply to the bundled service will apply to unbundled
         network elements. Notwithstanding the foregoing, GTE shall not be
         responsible for impacts on service attributes, grades of service, etc.,
         resulting from DTI's specific use of or modification to any unbundled
         network element.

3.       Network Interface Device.

3.1      Direct Connection. DTI shall be permitted to connect its own Loop
         directly to GTE's Network Interface Device or NID in cases in which DTI
         uses its own facilities to provide local service to an end user
         formerly served by GTE, as long as such direct connection does not
         adversely affect GTE's network. In order to minimize any such adverse
         effects, DTI shall follow the procedures in Sections 3.1.1 and 3.1.2
         below.

         3.1.1    When connecting its own loop facility directly to GTE's NID
                  for a residence or business customer, DTI must make a clean
                  cut on the GTE drop wire at the NID so that no bare wire is
                  exposed. DTI shall not remove or disconnect GTE's drop wire
                  from the NID or take any other action that might cause GTE's
                  drop wire to be left lying on the ground.

         3.1.2    At multi-tenant customer locations, DTI must remove the jumper
                  wire from the distribution block (i.e. the NID) to the GTE
                  cable termination block. If DTI cannot gain access to the
                  cable termination block, DTI must make a clean cut at the
                  closest point to the cable termination block. At DTI's request
                  and discretion, GTE will determine the cable pair to be
                  removed at the NID in multi-tenant locations. DTI will
                  compensate GTE for the trip charge necessary to identify the
                  cable pair to be removed.

         3.1.3    GTE agrees to offer NIDs for lease to DTI but not for sale.
                  DTI may remove GTE identification from any NID which it
                  connects to a DTI loop, but DTI may not place its own
                  identification on such NID.

         3.1.4    GTE Loop elements leased by DTI will be required to terminate
                  only on a GTE NID. If DTI leasing a GTE loop wants a DTI NID,
                  they will also be required to lease a GTE NID for the direct
                  loop termination and effect a NID to NID connection.

3.2      NID to NID Connection. Rather than connecting its loop directly to
         GTE's NID, DTI may also elect to install its own NID and effect a NID
         to NID connection to gain access to the end user's inside wiring.

         3.2.1    DTI that provides its own loop facilities may elect to move
                  all inside wire terminated on a GTE NID to one provided by
                  DTI. In this instance, a NID to NID connection will not be



                                     VII-2
<PAGE>   54

                  required. DTI, or the end user premise owner, can elect to
                  leave the GTE disconnected NID in place, or to remove the GTE
                  NID from the premise and dispose of it entirely.

3.3      Removal of Cable Pairs. Removal of existing cable pairs required for
         DTI to terminate service is the responsibility of DTI.

3.4      Maintenance. When DTI provides its own loop and connects directly to
         GTE's NID, GTE does not have the capability to perform remote
         maintenance. DTI can perform routine maintenance via its loop and
         inform GTE once the trouble has been isolated to the NID and GTE will
         repair (or replace) the NID, or, at DTI's option, it can make a NID to
         NID connection, using the GTE NID only to gain access to the inside
         wire at the customer location.

4.       Loop Elements.

4.1      Service Description. a "Loop" is an unbundled component of Exchange
         Service. In general, it is the transmission facility (or channel or
         group of channels on such facility) which extends from a Main
         Distribution Frame ("MDF') or functionally comparable piece of
         equipment in a GTE end office or wire center to a demarcation or
         connector block in/at a subscriber's premises. Traditionally, Loops
         were provisioned as 2-wire or 4-wire copper pairs running from the end
         office MDF to the customer premises. However, a loop may be provided
         via other media, including radio frequencies, as a channel on a high
         capacity feeder/distribution facility which may, in turn, be
         distributed from a node location to the subscriber premises via a
         copper or coaxial drop facility, etc.

4.2      Categories of Loops.  There are six general categories of loops:

         4.2.1    "2-wire analog voice grade" loops will support analog
                  transmission of 300-3000 Hz, repeat loop start or ground start
                  seizure and disconnect in one direction (toward the end office
                  switch), and repeat ringing in the other direction (toward the
                  end user). This loop is commonly used for local dial tone
                  service;

         4.2.2    "4-wire analog voice grade" loops conform to the
                  characteristics of a 2-wire voice grade loop and, in addition,
                  can support the simultaneous independent transmission of
                  information in both directions;

         4.2.3    "2-wire digital" loops will support industry standard
                  specifications for digital transmission. Special provisioning
                  (removal of bridge taps and/or load coils) will be required to
                  conform to these industry standards. The price for 2-wire
                  digital loops shall be the price for the basic 2-wire loop
                  plus the loop facility NRC to recover the cost of the special
                  provisioning.

         4.2.4    "4-wire digital" loops will support industry standard
                  specifications for digital transmission. Special provisioning
                  (removal of bridge taps and/or load coils) will be required to
                  conform to these industry standards. The price for 4-wire
                  digital loops shall be the price for the basic 4-wire loop
                  plus the loop facility NRC to recover the cost of the special
                  provisioning.

         4.2.5    "DS-1" loops will support a digital transmission rate of 1.544
                  Mbps. The DS-1 loop will have no bridge taps or load coils and
                  will employ special line treatment. DS-1 loops will include
                  span line repeaters where required, office terminating
                  repeaters, and DSX cross connects. Prices for DS-1 grade loops
                  are the prices set forth in the appropriate GTE intrastate
                  special access tariff.



                                     VII-3
<PAGE>   55

         4.2.6    "DS-3" loops will support the transmission of isochronous
                  bipolar serial data at a rate of 44.736 Mbps. This DS-3 type
                  of loop provides the equivalent of 28 DS-1 channels and shall
                  include the electronics at either end.

4.3      Conditioned Loops. DTI may also require that the loops ordered above be
         conditioned in order for them to provide the end-user service. Examples
         of this type of conditioning are: Type C, Type DA, Improved C, Clear
         Channel, etc. The price for such a conditioned loops shall be the
         applicable charge as provided in the appropriate GTE intrastate special
         access tariff.

4.4      Features, Functions, Attributes. To the degree reasonably possible, all
         transport-based features, functions, service attributes,
         grades-of-service, installation, maintenance and repair intervals that
         apply to the bundled services will apply to unbundled loops.

         4.4.1    GTE will not perform routine testing of the unbundled loop for
                  maintenance purposes. DTI will be required to provision a loop
                  testing device either in its central office (switch location),
                  Network Control Center or in its collocation arrangement to
                  test the unbundled loop. GTE will perform repair and
                  maintenance once trouble is identified by DTI.

         4.4.2    All Loop facilities furnished by GTE on the premises of DTI's
                  end users and up to the network interface or functional
                  equivalent are the property of GTE. GTE must have access to
                  all such facilities for network management purposes. GTE
                  employees and agents may enter said premises at any reasonable
                  hour to test and inspect such facilities in connection with
                  such purposes or, upon termination or cancellation of the Loop
                  facility, to remove such facility.

         4.4.3    GTE will provide loop transmission characteristics to DTI end
                  users which are equal to those provided to GTE end users.

         4.4.4    If DTI leases loops which are conditioned to transmit digital
                  signals, as a part of that conditioning, GTE will test the
                  loop and provide recorded test results to DTI. In maintenance
                  and repair cases, if loop tests are taken, GTE will provide
                  any recorded readings to DTI at time the trouble ticket is
                  closed in the same manner as GTE provides to itself and its
                  end users.

4.5      Digital Loop Carrier. Where GTE utilizes integrated digital loop
         carrier ("IDLC") (1) technology to provision the Loop element, GTE will
         take the necessary affirmative steps to provide unbundled Loops. The
         basic Loop provided will support voice grade services. Loop
         capabilities beyond voice grade (i.e., ISDN, ADSL, etc.) will be
         provided under the terms and conditions, and at the prices indicated in
         Section 4.3.

         4.5.1    GTE will permit DTI to collocate digital loop carriers and
                  associated equipment in conjunction with collocation
                  arrangements DTI maintains at a GTE wire center for the
                  purpose of interconnecting to unbundled Loop elements.

4.6      Unbundled Loop Facility Certification.

         4.6.1    Before deploying any service enhancing copper cable technology
                  (e.g., HDSL, ISDN, etc.) over unbundled 2-wire analog voice
                  grade loops leased from GTE, DTI shall notify GTE of 

- ---------------------

     (1)          See Bellcore TR-TSY-000008, Digital Interface Between the SLC-
96 Digital Loop Carrier System and Local Digital Switch and TR-TSY-000303, 
Integrated  Digital Loop Carrier (IDLC) Requirements, Objectives and Interface.



                                     VII-4


<PAGE>   56

                  such intentions to enable GTE to assess the loop transport
                  facilities to determine whether there are any existing copper
                  cable loop transport technologies (e.g., analog carrier, etc.)
                  deployed within the same cable sheath that would be interfered
                  with if DTI deployed the proposed service enhancing copper
                  cable technology. If there are existing copper cable loop
                  transport technologies already deployed within the same cable
                  sheath, or if GTE already has existing near term (within 18
                  months of the date of facility certification) plans to deploy
                  copper cable loop transport technologies that would be
                  interfered with as described above, GTE will so inform DTI and
                  DTI shall not be permitted to deploy such service enhancing
                  copper cable technologies. GTE will charge DTI the applicable
                  engineering time and labor costs to perform the certification.

         4.6.2    If DTI fails to notify GTE of its plans to deploy service
                  enhancing copper cable technology and obtain prior
                  certification from GTE of the facilities, if DTI's deployment
                  of such technology is determined to have caused interference
                  with existing or planned copper cable loop transport
                  technologies deployed by GTE in the same cable sheath, DTI
                  will immediately remove such service enhancing copper cable
                  technology and shall reimburse GTE for all incurred expense
                  related to this interference.

4.7      Unbundled Loop Facility Notification.

         4.7.1    GTE reserves the right to deploy within its network at its
                  sole discretion any and all copper cable loop transport
                  technologies. If GTE plans to deploy copper cable loop
                  transport technology within a cable sheath in which such
                  technology was not previously deployed, GTE will provide
                  notice to DTI of such planned deployment, indicating all
                  service enhancing copper cable technologies that would cause
                  interference with the technology to be deployed, or that would
                  be interfered with by the deployment of such technology. Such
                  notice will be provided at least ninety (90) Business Days in
                  advance of the planned deployment. If DTI has deployed any
                  technologies within the same cable sheath that would interfere
                  with, or be interfered with, by the technology GTE plans to
                  deploy, the parties will work together to resolve the
                  situation.

4.8      Subloops.

         4.8.1    GTE will provide as separate items the loop distribution, loop
                  concentrator and loop feeder on a case-by-case basis pursuant
                  to a Bona Fide Request ("BFR").

         4.8.2    GTE will design and construct loop access facilities
                  (including loop feeders and loop concentration/multiplexing
                  systems) in accordance with standard industry practices as
                  reflected in applicable tariffs and/or as agreed to by GTE and
                  DTI.

         4.8.3    Transport for loop concentrators/multiplexers services not
                  supported by embedded technologies will be provided pursuant
                  to applicable tariffs or as individually agreed upon by GTE
                  and DTI. The Parties understand that embedded loop
                  concentrators/multiplexers are not necessarily capable of
                  providing advanced and/or digital services.

         4.8.4    GTE will provide loop transmission characteristics as
                  specified in Section 4.4.3 herein.

5.       Port and Local Switching Elements.

5.1      Port. Port is an unbundled component of Exchange Service that provides
         for the interconnection of individual loops or trunks to the switching
         components of GTE's network. In general, it is a line card or trunk
         card and associated peripheral equipment on GTE end office switch that
         serves as the hardware termination for the end user's Exchange Service
         on that switch and generates dial 

                                     VII-5
<PAGE>   57

         tone and provides the end user access to the public switched
         telecommunications network. The port does not include such features and
         functions which are provided as part of Local Switching. Each line-side
         port is typically associated with one (or more) telephone number(s),
         which serve as the end user's network address.

5.2      Ports Available as Unbundled Network Elements. There are four types of
         Ports available as unbundled network elements;

         5.2.1    "2-wire analog line" Port is a line side switch connection
                  employed to provide basic residential and business type
                  Exchange Service.

         5.2.2    "2-wire ISDN digital line" Port is a Basic Rate Interface
                  (BRI) line side switch connection employed to provide ISDN
                  Exchange Services.

         5.2.3    "DS-1 digital trunk" Port is a direct inward dialing (DID)
                  trunk side switch connection employed to provide the
                  equivalent of 24 analog incoming trunk type Exchange Services.

         5.2.4    "4-wire ISDN digital DS-1 trunk" Port is a Primary Rate
                  Interface (PRI) trunk side switch connection employed to
                  provide the ISDN Exchange Services

5.3      Port Prices. Prices for 2-wire analog and DS-1 Ports are listed in
         Appendix G. 2-wire ISDN line side Ports and 4-wire ISDN trunk side
         Ports shall be provided at a price agreed to by the Parties.

5.4      Local Switching. Local switching provides the basic switching functions
         to originate, route and terminate traffic and any signaling deployed in
         the switch. Vertical features are optional services provided through
         software programming in the switch which can be added on a per-feature
         basis with applicable rate. GTE will offer only those features and
         functions currently available to the particular platform used (e.g.,
         DMS, 5ESS, GTD5). Any feature or function which is not available, but
         the switch is capable of providing, may be requested via the BFR
         process. DTI will be responsible for bearing any costs incurred by GTE
         in making such feature/function available, including Right-to-Use (RTU)
         fees. The rates for Local Switching and Vertical Features are listed in
         Appendix G.

         5.4.1    DTI must purchase Local Switching with the line-side Port or  
                  trunk-side Port, if applicable.

5.5      Compliance with Section 2.3. DTI shall only order unbundled elements in
         accordance with Section 2.3 herein and it will be the responsibility of
         DTI to make arrangements for the delivery of interexchange traffic and
         routing of traffic over interoffice transmission facilities, if
         applicable.

6.       Transport Facility.

6.1      Service Description. Transport is an unbundled component of Exchange
         Service. In general, it is the transmission facility (or channel or
         group of channels on such facility) which extends from a Main
         Distribution Frame (MDF) or functionally comparable piece of equipment
         in a GTE end office or access tandem to either (I) another MDF or
         functionally comparable piece of equipment in a GTE end office or
         access tandem, or (ii) a meet point with transport facilities of DTI or
         another carrier. Transport may be provided over a variety of media,
         including, but not limped to, copper cables, radio frequencies or
         channels on a high capacity facility.

                  6.1.1    Tandem Switching Capability. GTE will provide tandem
                           switching capability at GTE access tandems for
                           traffic between DTI and GTE end offices subtending
                           the GTE access tandem and for traffic between DTI
                           and non-GTE end offices subtending GTE access
                           tandems. GTE will provide the features and functions
                           that are 



                                     VII-6
<PAGE>   58

                  centralized in tandem switches including but not limited to
                  call recording, the routing of calls to operator services when
                  technically feasible, and signaling conversion features.

6.2      Categories/Types. Unbundled transport is provided under rates, terms
         and conditions of the applicable GTE access tariff or local private
         line tariff.

7.       SS7 Transport and Signaling. SS7 signaling and transport services in
         support of DTI's local exchange services shall be provided in
         accordance with the terms and conditions of Appendix I attached to this
         Agreement and made a part hereof.

7.1      GTE will provide interconnection with its SS7 at the STPs but not at
         other points.

8.       LIDB Services. Access to GTE's LIDB shall be provided in accordance
         with the rates, terms and conditions of GTE's switched access tariff,
         GTOC Tariff FCC No. 1, Section 8.

9.       Database 800-Type Services. Access to GTE's 800-Type database (i.e.,
         888, 877) shall be provided in accordance with the rates, terms and
         conditions of GTE's switched access tariff, GTOC Tariff FCC No. 1,
         Section 8.

10.      Data Switching.

10.1     Access. GTE will provide unbundled access to GTE data switches to DTI
         at the user network interface ("UNI") and network to network interface
         ("NNI") level subject to mutual agreement on technical standards.

10.2     Nondiscrimination. Data switching features and functionalities provided
         to DTI will be without discrimination with respect to the way GTE
         provides them to GTE end users. In the event of overflow or congestion
         conditions on the data switching network, DTI's data traffic carried on
         GTE facilities will be equal priority to GTE data traffic.

10.3     Testing Monitoring, Administration and Maintenance. Testing,
         monitoring, administration and maintenance will be performed by GTE in
         a nondiscriminatory manner.

11.      Digital Cross Connect System (DCS).

11.1     Access. GTE will provide unbundled access to the DCS element, which
         shall provide automated cross-connection (with CNC), facility grooming,
         bridging (MJU-digital), point to multipoint connections (DMB-analog),
         broadcast and automated facility test capabilities. These
         functionalities will be provided consistent with that which is provided
         to GTE end users. DTI shall submit a Bona Fide Request to GTE
         specifying these functionalities.

11.2     Optional Characteristics. The DCS element may include multiplexing,
         format conversion, signaling conversion and manual cross connection
         wiring.

11.3     Alternate Provisioning. Where no automated DCS capability exists, the
         cross connection function will be provided manually by GTE through the
         combination of DSX patch panels and D4 banks or DS0 (or higher
         capacity) equipment.

11.4     Elements. DTI will have access to the following DCS elements:

         (a)      DS0 with DS1 interface (CNC)


                                     VII-7
<PAGE>   59

         (b)      DS1/VT1.5 with DS1, DS3 and SONET interfaces (CNC and Titan 
                  5500)

11.5     Capabilities. The DCS elements will provide the following capabilities:

         (a)      Real-time configuration (with CNC)

         (b)      Real-time access to integrated test equipment (with React and
                  Customer Service)

         (c)      SONET asynchronous gateway functionality (with Titan 5500
                  only)

         (d)      Compliance with Bellcore and industry standards.

11.6     Protection and Performance. The unbundled DCS elements provided to DTI
         will have equipment/interface protection, redundant power supply and/or
         battery backup and performance/availability consistent with that
         provided to GTE end users.

11.7     Provisioning, Administration and Maintenance. GTE will provide
         provisioning, administration and maintenance of the DCS elements the
         same level as GTE provides to itself as well as real time access to
         performance monitoring and alarm data affecting DTI traffic (with CNC).
         GTE is not required to keep software updated to the "current available
         release" in every instance.

12.      Operator Services (OS) and Directory Assistance (DA). GTE will provide
         OS and DA to DTI in accordance with the terms set forth as follows:

         12.0.1     Where Customized Routing is available, GTE will offer
                    unbranded OS and DA or rebranded OS and DA with the DTI
                    brand. GTE will provide such unbranding or rebranding on a
                    switch-by-switch basis, subject to capability and capacity
                    limitations. Upon receipt of an order for unbranding or
                    rebranding, GTE will implement within 90 Business Days when
                    technically capable.

         12.0.2     DTI will be billed an element charge for OS and DA and a
                    charge for unbranding or rebranding and Customized Routing
                    as set forth in Section 12.1.2. In addition, charges
                    specified in Section 12.1.4 will apply.

         12.0.3     For those offices that DTI has requested GTE to rebrand
                    and/or unbrand OS and DA, GTE will provide it using live
                    operators where GTE performs its own OS and DA service and
                    where handled by automated systems. If GTE uses a Third
                    Party contractor to provide OS or DA, GTE will not provide
                    branding nor will GTE negotiate it with a Third Party on
                    behalf of DTI. DTI must negotiate with the Third Party. In
                    these instances, DTI will need to purchase customized
                    routing to differentiate OS/DA traffic between GTE's and a
                    Third Party.

12.1     Customized Routing. Where technically feasible and upon receipt of
         written request from DTI, GTE agrees to provide customized routing for
         the following types of calls:

                                    0-
                                    0+Local
                                    0+411
                                    1+411
                                    0+HNPA-555-1212 (intraLATA, only when
                                    intraLATA presubscription is not available)
                                    1+HNPA-555-1212 (intraLATA, only when
                                    intraLATA presubscription is not available)

                                     VII-8

<PAGE>   60

         12.1.1     GTE will provide DTI a list of switches that can provide
                    customized routing using line class codes or similar method
                    (regardless of current capacity limitations). DTI will
                    return a list of these switches ranked in priority order.
                    GTE will return to DTI a schedule for customized routing in
                    the switches with existing capabilities and capacity.

         12.1.2     Upon written request from DTI, GTE will provide DTI with
                    applicable charges, and terms and conditions, for providing
                    OS and DA, branding, and Customized Routing.

         12.1.3     Subject to the above provisions, GTE will choose the method
                    of implementing customized routing of OS and DA calls.

         12.1.4     The use of customized routing will require the purchase of a
                    trunk side port and dedicated facilities between the GTE end
                    office and the designated OS/DA platform. The rates for
                    these elements will be billed in accordance with Appendix G.

13.      Advanced Intelligent Network Access (AIN). GTE will provide DTI access
         to GTE AIN functionality from GTE's AIN SCP via GTE's local switch or
         DTI's local switch.

14.      Nondiscrimination Provision and Support. GTE agrees to provide
         unbundled network elements in a timely manner considering the need and
         volume of requests. GTE will provide unbundled network elements in a
         non-discriminatory manner and shall provide power to such elements on
         the same basis as GTE provides to itself.

15.      Provisioning Intervals. GTE agrees to provide unbundled network
         elements in a timely manner considering the need and volume of
         requests, pursuant to agreed upon service provisioning intervals.

16.      Directory Assistance Listing. When DTI orders an unbundled port, a
         Directory Service Request (DSR) must be submitted to have the listing
         included in GTE's Directory Assistance database. The applicable
         ordering charge will be applied for processing the DSR.




                                     VII-9



<PAGE>   61

                                  ARTICLE VIII
            ADDITIONAL SERVICES AND COORDINATED SERVICE ARRANGEMENTS

1.       Bona Fide Request Process.

1.1      Intent. The Bona Fide Request process is intended to be used when DTI
         requests customized Service Orders for certain services, features,
         capabilities or functionality defined and agreed upon by the Parties as
         services to be ordered as Bona Fide Requests.

1.2      Process.

  1.2.1  A Bona Fide Request shall be submitted in writing by DTI and shall
         specifically identify the need to include technical requirements, space
         requirements and/or other such specifications that clearly define the
         request such that GTE has sufficient information to analyze and prepare
         a response.

  1.2.2  Although not expected to do so, DTI may cancel a Bona Fide Request in
         writing at any time prior to DTI and GTE agreeing to price and
         availability. GTE will then cease analysis of the request.

  1.2.3  Within two (2) Business Days of its receipt, GTE shall acknowledge in
         writing the receipt of the Bona Fide Request and identify a single
         point of contact and any additional information needed to process the
         request.

  1.2.4  Except under extraordinary circumstances, within ten (10) Business Days
         of its receipt of a Bona Fide Request, GTE shall provide a proposed
         price and availability date, or it will provide an explanation as to
         why GTE elects not to meet DTI's request. If extraordinary
         circumstances prevail, GTE will inform DTI as soon as it realizes that
         it cannot meet the ten (10) Business Day response due date. DTI and GTE
         will then determine a mutually agreeable date for receipt of the
         request.

  1.2.5  Unless DTI agrees otherwise, all proposed prices shall be consistent
         with the pricing principles of the Act, FCC and/or the Commission.
         Payments for services purchased under a Bona Fide Request will be made
         upon delivery, unless otherwise agreed to by DTI, in accordance with
         the applicable provisions of the Agreement.

  1.2.6  Upon affirmative response from GTE, DTI will submit in writing its
         acceptance or rejection of GTE's proposal. If at any time an agreement
         cannot be reached as to the terms and conditions or price of the
         request GTE agrees to meet, the Dispute resolution procedures described
         in Article III herein may be used by a Party to reach a resolution.

2.       Transfer of Service Announcements. For services other than GTE resold
         and ported number services, when an end user customer transfers service
         from one Party to the other Party, and does not retain its original
         telephone number, the Party formerly providing service to the end user
         will provide, upon request and if such service is provided to its own
         customers, a referral announcement on the original telephone number.
         This announcement will provide the new number of the customer and will
         remain in effect for the same time period this service is provided to
         GTE's own end users. For GTE resold and ported number services, GTE
         shall provide an intercept referral on behalf of DTI.

3.       Misdirected Calls. The Parties will employ the following procedures for
         handling any misdirected calls (e.g., Business office, repair bureau,
         etc.).



                                     VIII-1
<PAGE>   62

3.1      To the extent the correct provider can be determined, each Party will
         refer misdirected calls to the proper provider of local exchange
         service. When referring such calls, both Parties agree to do so in a
         courteous manner, at no charge.

3.2      For misdirected repair calls, the Parties will provide their respective
         repair bureau contact number to each other on a reciprocal basis and
         provide the end user the correct contact number.

3.3      In responding to misdirected calls, nether Party shall make disparaging
         remarks about each other, nor shall they use these calls as a basis for
         internal referrals or to solicit end users or to market services.

4.       911/E911 Arrangements.

4.1      Description of Service. DTI will install a minimum of two (2) dedicated
         trunks to GTE's 911/E911 selective routers (i.e., 911 tandem offices)
         that serve the areas in which DTI provides Exchange Services, for the
         provision of 911/E911 services and for access to all subtending PSAPs.
         The dedicated trunks shall be, at a minimum, DS-0 level trunks
         configured as a 2-wire analog interface or as part of a digital (1.544
         Mbps) interface in which all circuits are dedicated to 9-1-1 traffic.
         Either configuration shall use CAMA type signaling with multifrequency
         ("MF") tones that will deliver ANI with the voice portion of the call.
         GTE will provide DTI with the appropriate CLLI codes and specifications
         of the tandem office serving area or the location of the primary PSAP
         when there is no 911 routing in that 911 district. If a DTI central
         office serves end users in an area served by more than one (1) GTE
         911/E911 selective router, DTI will install a minimum of two (2)
         dedicated trunks in accordance with this Section to each of such
         911/E911 selective routers or primary PSAP.

4.2      Transport. If DTI desires to obtain transport from GTE to the GTE 911
         selective routers, DTI may purchase such transport from GTE at the
         rates set forth in Appendix H.

4.3      Cooperation and Level of Performance. The Parties agree to provide
         access to 911/E911 in a manner that is transparent to the end user. The
         Parties will work together to facilitate the prompt, reliable and
         efficient interconnection of DTI's systems to the 911/E911 platforms,
         with a level of performance that will provide the same grade of service
         as that which GTE provides to its own end users. To this end, GTE will
         provide documentation to DTI showing the correlation of its rate
         centers to its E911 tandems at rates set forth in Appendix H.

4.4      Basic 911 and E911 General Requirements:

         4.4.1    Basic 911 and E911 provides a caller access to the appropriate
                  emergency service bureau by dialing a 3-digit universal
                  telephone number (911).

         4.4.2    Where GTE has a 911 selective router installed in the network
                  serving the 911 district, GTE shall use subscriber data
                  derived from the Automatic Location Identification/Database
                  Management System (ALI/DMS) to selectively route the 911 call
                  to the Public Safety Answering Point (PSAP) responsible for
                  the caller's location.

         4.4.3    All requirements for E911 also apply to the use of SS7 as a
                  type of signaling used on the interconnection trunks from the
                  local switch to an end office or a selective router.

         4.4.4    Basic 911 and E911 functions provided to DTI shall be at least
                  at parity with the support and services that GTE provides to
                  its subscribers for such similar functionality.


                                     VIII-2

<PAGE>   63

         4.4.5    Basic 911 and E911 access from Local Switching shall be
                  provided to DTI in accordance with the following:

                  4.4.5.1  GTE and DTI shall conform to all state regulations
                           concerning emergency services.

                  4.4.5.2  For E911, both DTI and GTE shall use their respective
                           service order processes to update access line
                           subscriber data for transmission to the database
                           management systems. Validation will be done via MSAG
                           comparison listed in Section 4.4.5.5.

                  4.4.5.3  If legally required by the appropriate jurisdiction,
                           GTE shall provide or overflow 911 traffic to be
                           routed to GTE Operator Services or, at DTI's
                           discretion, directly to DTI Operator Services.

                  4.4.5.4  Basic 911 and E911 access from the DTI local switch
                           shall be provided from GTE to DTI in accordance with
                           the following:

                           4.4.5.4.1      If required by DTI and technically
                                          feasible, GTE shall interconnect
                                          direct trunks from the DTI network to
                                          the E911 PSAP, or to the E911
                                          selective routers as designated by
                                          DTI. Such trunks may alternatively be
                                          provided by DTI.

                           4.4.5.4.2      In government jurisdictions where GTE
                                          has obligations under existing
                                          Agreements as the primary provider of
                                          the 911 System to the county (i.e.,
                                          "lead telco"), DTI shall participate
                                          in the provision of the 911 System as
                                          follows:

                                4.4.5.4.2.1     Each Party shall be responsible
                                                for those portions of the 911
                                                System for which it has control,
                                                including any necessary
                                                maintenance to each Party's
                                                portion of the 911 System.

                                4.4.5.4.2.2     DTI and GTE recognize that the
                                                lead telco in a 911 district has
                                                the responsibility of
                                                maintaining the ALI database for
                                                that district. Each company will
                                                provide its access line
                                                subscriber records to the
                                                database organization of that
                                                lead telco. DTI and GTE will be
                                                responsible for correcting
                                                errors when notified by either
                                                the 911 district or its
                                                customer, and then submitting
                                                the corrections to the lead
                                                telco. Lead telco database
                                                responsibilities are covered in
                                                Section 4.4.5.5 of this Article.

                                4.4.5.4.2.3     DTI shall have the right to
                                                verify the accuracy of
                                                information regarding DTI
                                                customers in the ALI database
                                                using methods and procedures
                                                mutually agreed to by the
                                                Parties. The fee for this
                                                service shall be determined
                                                based upon the agreed upon
                                                solution.

                           4.4.5.4.3      If a Third Party is the primary
                                          service provider to a 911 district,
                                          DTI shall negotiate separately with
                                          such Third Party with regard to the
                                          provision of 911 service to the
                                          agency. All relations between such


                                     VIII-3
<PAGE>   64

                                          Third Party and DTI are totally
                                          separate from this Agreement and GTE
                                          makes no representations on behalf of
                                          the Third Party.

                             4.4.5.4.4    If DTI or Affiliate is the primary
                                          service provider to a 911 district,
                                          DTI and GTE shall negotiate the
                                          specific provisions necessary for
                                          providing 911 service to the agency
                                          and shall include such provisions in
                                          an amendment to this Agreement.

                             4.4.5.4.5    Interconnection and database access
                                          shall be at rates as set forth in
                                          Appendix H.

                             4.4.5.4.6    GTE shall comply with established,
                                          competitively neutral intervals for
                                          installation of facilities, including
                                          any collocation facilities, diversity
                                          requirements, etc.

                             4.4.5.4.7    In a resale situation, where it may be
                                          appropriate for GTE to update the ALI
                                          database, GTE shall update such
                                          database with DTI data in an interval
                                          no less than is experienced by GTE
                                          subscribers, or than for other
                                          carriers, whichever is faster, at no
                                          additional cost.

                  4.4.5.5    The following are Basic 911 and E911 Database
                             Requirements:

                             4.4.5.5.1    The ALI database shall be managed by
                                          GTE, but is the property of GTE and
                                          any participating LEC or DTI which
                                          provides their records to GTE.

                             4.4.5.5.2    Copies of the MSAG shall be provided
                                          within five (5) business days after
                                          the date the request is received and
                                          provided on diskette or paper copy at
                                          the rates set forth in Appendix H.

                             4.4.5.5.3    DTI shall be solely responsible for
                                          providing DTI database records to GTE
                                          for inclusion in GTE's ALI database on
                                          a timely basis.

                             4.4.5.5.4    GTE and DTI shall arrange for the
                                          automated input and periodic updating
                                          of the E911 database information
                                          related to DTI end users. GTE shall
                                          work cooperatively with DTI to ensure
                                          the accuracy of the data transfer by
                                          verifying it against the Master Street
                                          Address Guide ("MSAG"). GTE shall
                                          accept electronically transmitted
                                          files or magnetic tape that conform to
                                          National Emergency Number Association
                                          ("NENA") Version #2 format.

                             4.4.5.5.5    DTI shall assign an E911 database
                                          coordinator charged with the
                                          responsibility of forwarding DTI end
                                          user ALI record information to GTE or
                                          via a third-party entity, charged with
                                          the responsibility of ALI record
                                          transfer. DTI assumes all
                                          responsibility for the accuracy of the
                                          data that DTI provides to GTE.

                             4.4.5.5.6    GTE shall update the database within
                                          one (1) business day of receiving the
                                          data from DTI. If GTE detects an error
                                          in the DTI provided data, the data
                                          shall be returned to DTI within one
                                          day from when it was provided to GTE.
                                          DTI shall respond to requests from GTE
                                          to make corrections to database record
                                          errors by


                                     VIII-4
                                           
<PAGE>   65

                                          uploading corrected records within one
                                          day. Manual entry shall be allowed
                                          only in the event that the system is
                                          not functioning properly.

                             4.4.5.5.7    GTE agrees to treat all data on DTI
                                          subscribers provided under this
                                          Agreement as strictly confidential and
                                          to use data on DTI subscribers only
                                          for the purpose of providing E911
                                          services.

                             4.4.5.5.8    GTE shall adopt use of a Carrier Code
                                          (NENA standard five-character field)
                                          on all ALI records received from DTI.
                                          The Carrier Code will be used to
                                          identify the carrier of record in NP
                                          configurations. The NENA Carrier Code
                                          for DTI is "DTI"; the NENA Carrier
                                          Code for GTE is "GTE."

                  4.4.5.6    GTE and DTI will comply with the following
                             requirements for network performance, maintenance
                             and trouble notification.

                             4.4.5.6.1    Equipment and circuits used for 911
                                          shall be monitored at all times.
                                          Monitoring of circuits shall be done
                                          to the individual trunk level.
                                          Monitoring shall be conducted by GTE
                                          for trunks between the selective
                                          router and all associated PSAPs.

                             4.4.5.6.2    Repair service shall begin immediately
                                          upon report of a malfunction. Repair
                                          service includes testing and
                                          diagnostic service from a remote
                                          location, dispatch of or in-person
                                          visit(s) of personnel. Where an
                                          on-site technician is determined to be
                                          required, a technician will be
                                          dispatched without delay.

                             4.4.5.6.3    GTE shall notify DTI forty-eight (48)
                                          hours in advance of any scheduled
                                          testing or maintenance affecting DTI
                                          911 service. GTE shall provide
                                          notification as soon as possible of
                                          any unscheduled outage affecting DTI
                                          911 service.

                             4.4.5.6.4    All 911 trunks must be capable of
                                          transporting Baudot Code necessary to
                                          support the use of Telecommunications
                                          Devices for the Deaf ("TTY/TDDs").

                  4.4.5.7    Basic 911 and E911 Additional Requirements

                             4.4.5.7.1    All DTI lines that have been ported
                                          via INP shall reach the correct PSAP
                                          when 911 is dialed. Where GTE is the
                                          lead telco and provides the ALI, the
                                          ALI record will contain both the DTI
                                          number and GTE ported number. The PSAP
                                          attendant shall see both numbers where
                                          the PSAP is using a standard ALI
                                          display screen and the PSAP extracts
                                          both numbers from the data that is
                                          sent. GTE shall cooperate with DTI to
                                          ensure that 911 service is fully
                                          available to all DTI end users whose
                                          telephone numbers have been ported
                                          from GTE, consistent with State
                                          provisions.

                             4.4.5.7.2    DTI and GTE shall be responsible for
                                          reporting all errors, defects and
                                          malfunctions to one another. GTE and
                                          DTI shall provide each other with a
                                          point of contact for reporting errors,
                                          defects, and 



                                     VIII-5
<PAGE>   66

                                          malfunctions in the service and shall
                                          also provide escalation contacts.

                             4.4.5.7.3    DTI may enter into subcontracts with
                                          third parties, including DTI
                                          Affiliates, for the performance of any
                                          of DTI's duties and obligations stated
                                          herein.

                             4.4.5.7.4    Where GTE is the lead telco, GTE shall
                                          provide DTI with notification of any
                                          pending selective router moves within
                                          at least ninety (90) days in advance.

                             4.4.5.7.5    Where GTE is the lead telco, GTE shall
                                          establish a process for the management
                                          of NPA splits by populating the ALI
                                          database with the appropriate new NPA
                                          codes.

                             4.4.5.7.6    Where GTE is the lead telco, GTE shall
                                          provide the ability for DTI to update
                                          911 database with end user information
                                          for lines that have been ported via
                                          INP or LNP.

         4.4.6    Basic 911 and E911 Information Exchanges and interfaces. Where
                  GTE is the lead telco:

                  4.4.6.1    GTE shall provide DTI access to the ALI Gateway
                             which interfaces to the ALI/DMS database. GTE shall
                             provide error reports from the ALI/DMS database to
                             DTI within one (1) day after DTI inputs information
                             into the ALI/DMS database. Alternately, DTI may
                             utilize GTE or a Third Party entity to enter
                             subscriber information into the database on a
                             demand basis, and validate subscriber information
                             on a demand basis. The rates are set forth in
                             Appendix H.

                  4.4.6.2    GTE and DTI shall arrange for the automated input
                             and periodic updating of the E911 database
                             information related to DTI end users. GTE shall
                             work cooperatively with DTI to ensure the accuracy
                             of the data transfer by verifying it against the
                             Master Street Address Guide ("MSAG"). GTE shall
                             accept electronically transmitted files or magnetic
                             tape that conform to National Emergency Number
                             Association ("NENA") Version #2 format.

                  4.4.6.3    Updates to MSAG. Upon receipt of an error recording
                             an DTI subscriber's address from GTE, and where GTE
                             is the lead telco, it shall be the responsibility
                             of DTI to ensure that the address of each of its
                             end users is included in the Master Street Address
                             Guide ("MSAG") via information provided on DTI's
                             Local Service Request ("LSR") or via a separate
                             feed established by DTI pursuant to Section 4.4.5.7
                             of this Article.

                  4.4.6.4    The ALI database shall be managed by GTE, but is
                             the property of GTE and all participating telephone
                             companies. The interface between the E911 Switch or
                             Tandem and the ALI/DMS database for DTI subscriber
                             shall meet industry standards.

4.5      Compensation. In situations in which GTE is responsible for maintenance
         of the 911/E911 database and can be compensated for maintaining DTI's
         information by the municipality, GTE will seek such compensation from
         the municipality. GTE will seek compensation from DTI only if, and to
         the extent, that GTE is unable to obtain such compensation from the
         municipality. GTE



                                     VIII-6
<PAGE>   67

         shall charge DTI a portion of the cost of the shared 911/E911 selective
         router as set forth in Appendix H.

5.       Information Services Traffic.

5.1      Routing. Each Party shall route traffic for Information Services (i.e.
         900-976, Internet, weather lines, sports providers, etc.) which
         originates on its network to the appropriate Information Service
         Platform.

5.2      Billing and Collection and Information Service Provider (ISP)
         Remuneration.

         5.2.1    In the event GTE performs switching of ISP traffic associated
                  with resale or unbundled network elements for DTI, GTE shall
                  provide to DTI GTE's standard call detail records so as to
                  allow DTI to bill its end users. GTE shall not be responsible
                  or liable to DTI or ISP for Billing and Collection and/or any
                  receivables of Information Service Providers.

         5.2.2    Notwithstanding and in addition to Article III, Section 24,
                  GTE shall be indemnified and held harmless by CLEC from and
                  against any and all suits, actions, losses, damages, claims,
                  or liability of any character, type, or description, including
                  all expenses of litigation and court cost which may arise as a
                  result of the provisions contained in this Article VIII,
                  Section 5.2.1 supra. The indemnity contained in this section
                  shall survive the termination of this Agreement, for whatever
                  reason.

         5.2.3    GTE agrees to notify DTI in writing within ten (10) working
                  days, by registered or certified mail at DTI's address of any
                  claim made against GTE on the obligations indemnified against
                  pursuant to this Article VIII, Section 5.

         5.2.4    It is understood and agreed that the indemnity provided for in
                  this Article VIII, Section 5 is to be interpreted and enforced
                  so as to provide indemnification of liability to GTE to the
                  fullest extent now or hereafter permitted by law.

5.3      900-976 Call Blocking. GTE shall not unilaterally block 900-976 traffic
         in which GTE performs switching associated with resale or unbundled
         network elements. GTE will block 900-976 traffic when requested to do
         so, in writing, by DTI. DTI shall be responsible for all cost
         associated with the 900-976 call blocking request. GTE reserves the
         right to block any and all calls which may harm or damage its network.

5.4      Miscellaneous. GTE reserves the right to provide to any Information
         Service Provider a list of any and all Telecommunications Providers
         doing business with GTE.

6.       Telephone Relay Service. Local and intraLATA Telephone Relay Service
         ("TRS") enables deaf, hearing-impaired, or speech-impaired TRS users to
         reach other telephone users. With respect to resold services, DTI's end
         users will have access to the state authorized TRS provider to the
         extent required by the Commission, including any applicable
         compensation surcharges.

7.       Directory Assistance (DA) and Operator Services (OS). Where DTI is
         providing local service with its own switch, upon DTI's request GTE
         will provide to DTI rebranded or unbranded directory assistance
         services and/or operator services pursuant to separate contracts to be
         negotiated in good faith between the Parties. If DTI so requests
         directory assistance services and/or operator services, such contracts
         shall provide for the following:

7.1      Directory Assistance Calls. GTE directory assistance centers shall
         provide number and addresses to DTI end users in the same manner that
         number and addresses are provided to 



                                     VIII-7
<PAGE>   68

         GTE end users. If information is provided by an automated response unit
         ("ARU"), such information shall be repeated twice in the same manner in
         which it is provided to GTE end users. Where available, GTE will
         provide call completion to DTI end users in the same manner that call
         completion is provided to GTE end users. GTE will provide its existing
         services to DTI end users consistent with the service provided to GTE
         end users.

7.2      Operator Services Calls. GTE operator services provided to DTI end
         users shall be provided in the same manner GTE operator services are
         provided to GTE end users. In accordance with GTE practices and at GTE
         rates, GTE will offer to DTI end users collect, person-to-person,
         station-to-station calling, Third Party billing, emergency call
         assistance, calling card services, credit for calls, time and charges,
         notification of the length of call, and real time rating. GTE operators
         shall also have the ability to quote DTI rates upon request but only if
         there is appropriate cost recovery to GTE and to the extent it can be
         provided within the technical limitations of GTE's switches. GTE will
         provide its existing services to DTI end users consistent with the
         service GTE provides to its own end users.

8.       Directory Assistance Listings Information. GTE will include listings in
         its directory assistance database for DTI end users in the same
         geographic area as GTE provides directory assistance for GTE end users
         as specified in Article VI, Section 3.4.

8.1      GTE shall provide to DTI, at DTI's request, for purposes of DTI
         providing DTI-branded directory assistance services to its local
         customers, within sixty (60) Business Days after an order for such tape
         is received, all published DA listings for that specific state via
         magnetic tape. Such listings will be Confidential Information under
         this Agreement and DTI will use the listings only for its directory
         assistance services to its end users. If DTI uses a Third Party
         directory assistance service to its end users, DTI will ensure that
         such Third Party likewise treats the listings as Confidential
         Information under this Agreement, and uses them only for such directory
         assistance. Changes to the DA Listing Information shall be updated on a
         daily basis through the same means used to transmit the initial list.
         DA Listing Information provided shall indicate whether the customer is
         a residence or business customer. The rate to be paid by DTI to GTE
         will be reasonable and mutually agreed upon.

8.2      The Parties will not release DA Listing Information that includes the
         other Party's end user information to Third Parties without the other
         Party's written approval. The other Party will inform the Releasing
         Party if it desires to have the Releasing Party provide the other
         Party's DA Listing Information to the Third Party, in which case, the
         Releasing Party shall provide the other Party's DA Listing Information
         at the same time as the Releasing Party provides the Releasing Party's
         DA Listing Information to the Third Party. The rate to be paid by the
         Releasing Party to the other Party shall be no more than the direct
         costs of compiling such information. The other Party shall be
         responsible for billing the Third Party.

8.3      The Parties will work together to identify and develop procedures for
         database error corrections.

9.       Directory Listings and Directory Distribution. DTI will be required to
         negotiate a separate agreement for directory listings and directory
         distribution, except as set forth below, with GTE's directory
         publication company.

         Listings. DTI agrees to supply GTE on a regularly scheduled basis, at
         no charge, and in a mutually agreed upon format (e.g. Ordering and
         Billing Forum developed), all listing information for DTI's subscribers
         who wish to be listed in any GTE published directory for the relevant
         operating area. Listing information will consist of names, addresses
         (including city, state and zip code) and telephone numbers. Nothing in
         this Agreement shall require GTE to publish a directory where it would
         not otherwise do so.

                                     VIII-8
<PAGE>   69

         Listing inclusion in a given directory will be in accordance with GTE's
         solely determined directory configuration, scope, and schedules, and
         listings will be treated in the same manner as GTE's listings.

         Distribution. Upon directory publication, GTE will arrange for the
         initial distribution of the directory to service subscribers in the
         directory coverage area at no charge.

         DTI will supply GTE in a timely manner with all required subscriber
         mailing information including non-listed and non-published subscriber
         mailing information, to enable GTE to perform its distribution
         responsibilities.

10.      Busy Line Verification and Busy Line Verification Interrupt. Each Party
         shall establish procedures whereby its operator assistance bureau will
         coordinate with the operator assistance bureau of the other Party to
         provide Busy Line Verification ("BLV") and Busy Line Verification and
         Interrupt ("BLVI") services on calls between their respective end
         users. Each Party shall route BLV and BLVI inquiries over separate
         inward operator services trunks. Each Party's operator assistance
         bureau will only verify and/or interrupt the call and will not complete
         the call of the end user initiating the BLV or BLVI. Each Party shall
         charge the other for the BLV and BLVI services at the rates contained
         in Appendix F, or if there is no applicable rate listed in Appendix F,
         at the rates in their respective tariffs.

11.      SAG. GTE will provide to DTI upon request the Street Address Guide at a
         reasonable charge. Two companion files will be provided with the SAG
         which lists all services and features at all LSOs, and lists services
         and features that are available in a specific LSO.

12.      Dialing Format Changes. GTE will provide reasonable notification to DTI
         of changes to local dialing format, i.e., 7 to 10 digit, by end office.

13.      Operational Support Systems (OSS). GTE shall provide OSS functions to
         DTI for ordering, provisioning and billing that are generally available
         as described in Appendix I attached to this Agreement. DTI shall pay
         GTE for access to GTE's OSS functions consistent with processes defined
         in Appendix I.






                                     VIII-9

   
<PAGE>   70
                                   ARTICLE IX
                                   COLLOCATION

1.       Physical Collocation. GTE shall provide to DTI physical collocation of
         equipment pursuant to 47 CFR Section 51.323 necessary for
         interconnection or for access to unbundled network elements, provided
         that GTE may provide virtual collocation in place of physical
         collocation, or in some cases deny a particular collocation request
         entirely, if GTE demonstrates that physical collocation, or perhaps
         even virtual collocation, is not practical because of technical reasons
         or space limitations, as provided in Section 251(c)(6) of the Act. GTE
         will work with DTI to install collocation arrangements within 120
         calendar days absent extenuating circumstances, GTE will provide such
         collocation for purposes of interconnection or access to unbundled
         network elements pursuant to the terms and conditions in the applicable
         federal and state EIS tariffs.

1.1      Space Planning. In addition to such provisions for space planning and
         reservation as may be set forth in the applicable GTE federal and state
         EIS tariffs, the parties agree to the following terms and conditions.

         1.1.1    GTE has the right to reserve space within its central offices
                  for its own use based on a 5-year planning horizon.

         1.1.2    GTE will notify DTI if it plans to build an addition to a
                  central office where DTI has collocated facilities, if such
                  addition would result in a material increase of space
                  available for collocation.

         1.1.3    Should DTI submit to GTE a two-year forecast for space
                  planning for collocated facilities in a central office, GTE
                  will, in good faith, consider and discuss such forecast with
                  DTI when considering space planning or utilization decisions
                  for such central office; provided, however that any final
                  space planning or utilization decision shall be made by GTE in
                  its sole discretion in light of GTE requirements.

         1.1.4    Subject to technical feasibility and space limitations, GTE
                  will make available at applicable federal and state EIS
                  tariffs such intraoffice facilities as may be necessary to
                  accommodate projected volumes of DTI traffic.

1.2      Connection to Customer LOOPS and Ports. Facilities for cross-connection
         to unbundled loops and ports shall be provided under the applicable GTE
         federal tariff for Special Access Cross Connect, until such time as a
         local tariff applicable to the facilities used for such
         cross-connection is filed.

1.3      Connection to Other Collocated Carriers. Subject to technical
         feasibility and space limitations, DTI may interconnect with other
         carriers collocated at a GTE central office at which DTI has collocated
         facilities; provided, however, that DTI and such other carriers must be
         collocated at the GTE central office for the primary purpose of
         interconnecting with GTE or accessing GTE's unbundled network elements.
         If DTI wants to interconnect with other carriers collocated at a GTE
         central office, DTI must provide GTE with thirty Business Days' prior
         written notice, during which time GTE may elect to provide the
         facilities necessary to accomplish such interconnection. DTI and the
         other collocated carriers may provide the necessary interconnection
         facilities only if GTE elects not to provide such facilities or fails
         to so elect within the thirty day notice period. If GTE elects to
         provide interconnection facilities under this section, GTE will provide
         this cross connection under the GTE federal tariff for Special Access
         Cross Connect, until such time as a local tariff applicable to the
         facilities used for such interconnection facilities is filed.

                                    IX-1
<PAGE>   71

1.4      Choice of Vendor. DTI may use the vendor of its choice to install,
         maintain and repair equipment within DTI's collocated space. Access by
         the employees, agents or contractors of such vendor shall be subject to
         the same restrictions on access by employees, agents or contractors of
         DTI imposed under the applicable GTE federal and state EIS tariffs,
         including but not limited to certification and approval by GTE.

1.5      Monitoring. Subject to technical feasibility and space limitations, DTI
         may extend its own facilities for remote monitoring of its collocated
         equipment to its collocated space. DTI may request that GTE provide the
         facilities necessary for such remote monitoring, at which time GTE and
         DTI will negotiate in good faith the price, terms and conditions of
         remote monitoring by GTE.

1.6      Phone Service. Upon ordering collocated space, DTI may order that its
         collocation cage be provided with plain old telephone service (POTS)
         commencing at such time as GTE has completed construction of the
         collocated space. DTI shall pay separately for any ordered POTS
         service.

1.7      Intraoffice Diversity. At DTI's request, GTE will provide diversity for
         ingress/egress fiber and power cables where such diversity is available
         and subject to technical feasibility and space limitations.

1.8      DTI Proprietary Information. GTE will protect all DTI proprietary
         information to the extent required under non-disclosure agreements
         existing as of the date GTE completes construction of a physical
         collocation space at DTI's request.

1.9      Notification of Modifications. GTE will notify DTI of modifications to
         collocation space in accord with the terms of applicable GTE state and
         federal EIS tariffs. Additionally, GTE shall notify DTI when major
         upgrades are made to the power plants supporting DTI's collocation
         space. The following shall constitute such major upgrades:

         (a)      replacement of a rectifier;

         (b)      addition or replacement of a new fusing module;

         (c)      addition or replacement of a power distribution unit frame; or

         (d)      addition or replacement of modular rectifiers.

1.10     Drawings. When DTI orders collocated space, GTE and DTI will hold a
         GTE/Customer meeting in accord with applicable GTE state and federal
         EIS tariffs. At such meeting, GTE will provide such drawings of GTE's
         central office facility as may be necessary to adequately depict DTI's
         proposed collocation space.

1.11     Construction of Space. GTE will construct DTI's collocation space in
         accord with the terms and conditions set forth in the applicable GTE
         state and federal EIS tariff. Additionally, GTE agrees to the following
         terms and conditions regarding construction of collocated space:

         1.11.1   Space will be constructed in 100 square foot increments, and
                  shall be designed so as to prevent unauthorized access.

         1.11.2   a standard 100 square foot cage shall have the following
                  standard features:

                    (a)      eight-foot high, nine gauge chain link panels;


                                    IX-2
<PAGE>   72


                    (b)      three of the panels listed at (a) above shall
                             measure eight by ten feet, the fourth panel shall
                             measure eight by seven feet;

                    (c)      the door to the cage shall measure eight by three
                             feet and shall also consist of nine gauge chain
                             link;

                    (d)      the cage shall be provided with one padlock set,
                             with GTE retaining one master key;

                    (e)      one ac electrical outlet;

                    (f)      one charger circuit system;

                    (g)      one electrical sub-panel;

                    (h)      such additional lighting as may be necessary;

                    (i)      one fire detection requirement evaluation;

                    (j)      grounding for the cage consistent with COEI.

         1.11.3     Modifications to the standard configuration set forth in
                    Section 1.11.2 can be made on an individual case basis. If
                    modifications are agreed upon and made by the Parties, GTE
                    will work with DTI to implement such additional
                    modifications as may be necessary to ensure that DTI's
                    collocated space is protected from unauthorized access.

         1.11.4     At such time as construction of DTI's collocation space is
                    approximately 50 percent completed, GTE will give DTI
                    notification, and such notification shall include scheduled
                    completion and turnover dates.

         1.11.5     Upon completion of construction of collocated space, GTE
                    will conduct a walk through of the collocated space with
                    DTI. Should DTI note any deviations from the plan agreed
                    upon by GTE and DTI at the customer meeting, and if such
                    deviations were not requested by DTI or not required by law,
                    GTE shall correct such deviations at its own expense within
                    5 Business Days.

1.12     Connection Equipment. DTI may provision equipment for the connection of
         DTI termination equipment to GTE equipment using either of the
         following methods:

         1.12.1     DTI may extend an electrical or optical cable from the
                    terminal within DTI's collocation cage and terminate that
                    cable at GTE's network.

         1.12.2     DTI may install a patch panel within its collocation cage
                    and then hand the cabling to GTE to extend to and have GTE
                    terminate that cable at GTE's network.

1.13     Access to DTI Collocation Space. The terms and conditions of access to
         DTI's collocation space shall be as set forth in applicable GTE state
         and federal EIS tariffs. Additionally, GTE agrees that the following
         terms and conditions shall apply to access:

         1.13.1     GTE shall implement adequate measures to control access to
                    collocation cages.

         1.13.2     Collocation space shall comply with all applicable fire and
                    safety codes.


                                    IX-3
<PAGE>   73


         1.13.3     Doors with removable hinges or inadequate strength shall be
                    monitored by an alarm connected to a manned site. All other
                    alarms monitoring DTI collocation space provided by GTE
                    shall also be connected to a manned site. DTI may, at its
                    option, provide its own intrusion alarms for its collocated
                    space.

         1.13.4     GTE shall control janitorial access to collocation cages,
                    and restrict such access to approved and certified
                    employees, agents or contractors.

         1.13.5     GTE shall establish procedures for access to collocation
                    cages by GTE and non- GTE emergency personnel, and shall not
                    allow access by security guards unless such access comports
                    with this section and is otherwise allowed under applicable
                    GTE state and federal EIS tariffs.

         1.13.6     GTE shall retain a master key to DTI's collocation space for
                    use only in event of emergency as detailed in applicable GTE
                    state and federal tariffs. At DTI's option, the Parties
                    shall review key control procedures no more frequently than
                    once in any twelve month period. At any time, DTI may elect
                    to change keys if it suspects key control has been lost,
                    provided, however, that GTE will be provided with a master
                    key in accord with this section.

         1.13.7     Not more frequently than once a year, DTI may audit the
                    security and access procedures and equipment applicable to
                    its collocated space and the central office housing the
                    collocation space. Access by personnel necessary to conduct
                    such an audit shall be limited as set forth in applicable
                    GTE state and federal EIS tariffs. Should DTI identify
                    deficiencies in security and access procedures and equipment
                    as a result of such audit, the cost, terms and conditions of
                    the correction of such deficiencies shall be negotiated in
                    good faith between the parties.

2.       Virtual Collocation. Subject to Section 1 of this Article IX, GTE will
         provide virtual collocation for purposes of interconnection or access
         to unbundled network elements pursuant to the terms and conditions in
         the applicable GTE federal and state EIS tariffs. In addition, GTE
         agrees that the terms and conditions set forth in this Section 2 of
         this Article IX, shall apply to virtual collocation provided to DTI.

2.1      Existing Virtual Collocation. If, on the effective date of this
         Agreement, DTI is virtually collocated in a GTE premise, DTI may (I)
         elect to retain its virtual collocation arrangement in that premise or
         (ii) unless it is not practical for technical reasons or because of
         space limitations, convert its virtual collocation arrangement at that
         premise to physical collocation. If DTI elects the latter option, DTI's
         request shall be treated as a new physical collocation request and DTI
         shall pay GTE at the applicable tariff rates for construction and
         rearrangement of DTI's equipment as well as all applicable tariffed
         physical collocation recurring charges.

2.2      Conversion from Physical to Virtual. Unless it is not practical for
         technical reasons or because of space limitations, DTI may convert a
         physical collocation arrangement to a virtual collocation arrangement.
         DTI's request to do so shall be treated as a new virtual collocation
         request and DTI shall pay GTE at the applicable tariff rates for
         construction and rearrangement of DTI's equipment as well as all
         applicable tariffed virtual collocation recurring charges. If DTI
         elects to change to a virtual collocation arrangement pursuant to this
         section, GTE will not refund previous payments for physical collocation
         received from DTI.

2.3      Vendors. Choice of vendors for equipment used for virtual collocation
         shall be under the terms and conditions set forth in the applicable GTE
         federal and state EIS tariff. Upon request by DTI, 


                                    IX-4
<PAGE>   74

         GTE shall provide a list of locally qualified vendors approved
         for the type of equipment to be collocated.

2.4      Inspection. Upon provision of virtual collocation by GTE, the Parties
         shall agree on a mutually acceptable schedule whereby DTI may inspect
         the equipment in its virtual collocation space.



                                    IX-5
<PAGE>   75




                                    ARTICLE X
               ACCESS TO POLES, DUCTS, CONDUITS AND RIGHTS-OF-WAY

To the extent required by the Act, GTE and DTI shall each afford to the other
access to the poles, ducts, conduits rights of way it owns or controls on terms,
conditions and prices comparable to those offered to any other entity pursuant
to each Parties tariffs and/or standard agreements. Accordingly, GTE and DTI
shall execute pole attachment and conduit occupancy agreements in the form set
forth in Appendices I and J.



                                     X-1
<PAGE>   76



IN WITNESS WHEREOF, each Party has executed this Agreement to be effective as of
the date first above written.

GTE SOUTHWEST INCORPORATED;                     DIGITAL TELEPORT, INC.
GTE ARKANSAS INCORPORATED;               
GET MIDWEST INCORPORATED                 
                                         
                                         
By /s/ Connie Nicholas                          By /s/ J. W. Sheehy
  -----------------------------                   -----------------------------
Name Connie Nicholas                            Name J.W. Sheehy
    ---------------------------                     ---------------------------
                                         
      Assistant Vice President                       
Title Wholesale Market Interconnection          Title Vice President IC Support
     ----------------------------------               --------------------------
Date November 7, 1997                           Date 10/20/97
    ---------------------------                      ---------------------------




<PAGE>   77




                                 APPENDIX A
                        GTE PERFORMANCE MEASURES (PM)

Pursuant to Article III of this Agreement, the following terms and conditions
shall apply regarding the performance measures set forth in this Appendix A. The
Parties recognize that these performance measures are new and evolving, and as
further evolution is made by GTE, the parties will discuss the changed
procedures, including new standard processes and procedures, if any, for the
purpose of applying them to and incorporating them in this Agreement.

GTE'S PERFORMANCE MEASURES (PMs) as set forth in this Appendix implement
standards to measure the quality of services supplied by GTE with respect to
pre-ordering, order/provisioning, maintenance and billing that is equivalent in
equality to what GTE provides to itself. GTE's PMs contain measures for both GTE
and DTI with the measures for DTI being considered an essential element for GTE
meeting customer expectations.

GTE's PMs are conditioned upon a 150 order per month minimum requirement as
described below for Service Units, as a threshold for providing Financial
Incentives for certain PMs. The 150 order per month requirement for Service
Units was developed to provide a statistically valid sample size to measure
GTE's performance for DTI in relationship to the level of performance GTE
provides to its own customers. Service Units are defined to include unbundled
loops, unbundled ports, resold local service lines, INP ported numbers, and
interconnection trunks.

GTE will begin recording of performance data in the first full month in which it
receives the first official order from DTI. GTE's report of performance measures
to DTI, however, will begin after 6 months of data recording; i.e., for data
recorded in the seventh full month. Each month's report will then be reported as
a rolling 3-month result (i.e., July's report will actually include May, June,
July data). The calculation of DTI performance will be based on this 3 month
rolling average of actual performance unless otherwise specified.

Reporting will be available monthly, or at a longer interval, as requested by
DTI. The details of report delivery shall be agreed upon between DTI and the
appropriate GTE Account Management group.

FORECASTING PERFORMANCE MEASUREMENT - GTE's PMs are conditioned upon the
requirement, as described more fully below, that DTI submit timely and accurate
forecasts. The Forecasting PM includes provisions that measure the accuracy of
DTI's forecast by comparing forecasted Service Units to ordered Service Units
for the same period.

DTI shall furnish a quarterly forecast of service order volumes and quantities
of resold local services, unbundled network elements, and interconnection trunks
on a State-wide basis, identifying these volumes/quantities by month, for each
month included in the quarter. These forecasts shall be received by GTE at least
one month before the beginning of the quarter covered by the forecast. Should
the first month of the next quarterly forecast be greater than ten (10%) percent
of the last month of the current quarterly forecast, DTI shall notify GTE
promptly of the increased order volume. Notification shall be made to the
appropriate GTE Account Management group in order to allow sufficient "lead
time" to ensure staffing levels are available to support the increased order
volumes.

DTI must agree to comply with the requirements of the Forecasting PM as the
basis for the application of Financial Incentives described below. If DTI
chooses not to comply with the Forecasting PM, Financial Incentives will not
apply. For purposes of applying Financial Incentives the accuracy of forecasts
will be determined at the state level.


                                     A-1
<PAGE>   78


The measurement and reporting of GTE's PMs will still be made available as
stated above regardless of DTI's election for the Forecasting PM.

FINANCIAL INCENTIVES - When DTI agrees to the Forecasting PM described above,
Financial Incentives will begin concurrently with reporting of individual DTI
performance data except as specified below for the
Pre-Ordering/Ordering/Provisioning and Interconnection PMs.

Financial Incentives will apply to Maintenance/Repair PMs without restriction
other than DTI's participation in the Forecasting PM.

Financial Incentives will apply to Pre-Ordering/Ordering/Provisioning and
Interconnection PMs subject to DTI's participation in the Forecasting PM and the
required per month ordering threshold. DTI must place a 150 orders per month
minimum for Service Units, by state, for three (3) consecutive months (hereafter
the "150-order requirement"). Once DTI's order volume reaches the "150-order
requirement", a ninety (90) day grace period will begin wherein data will be
accumulated and reviewed. At the end of that ninety (90) day grace period,
applicable Financial Incentives shall apply. The three (3) consecutive months
and the subsequent ninety (90) day grace period may be concurrent with all or
part of the beginning six (6) month period after recording of official data
begins, between initial order activity and the implementation of performance
reporting (i.e., month 7 data).

For purposes of applying Financial Incentives to the Forecasting PM, if DTI's
actual order activity for Service Units in a given month is below the forecast
for that month by more than 10%, Financial Incentives will apply only to the
incremental Service Units that were forecasted but not ordered; i.e., the
difference between the actual quantity ordered and the quantity which reflects
the forecast less 10%.

For purposes of applying Financial Incentives to the Pre-ordering/Ordering/
Provisioning and Interconnection PM, if DTI's actual order activity for Service
Units in a given month exceeds the forecast for that month by more than 10%, 
Financial Incentives will not apply.

Average Non-Recurring Charges - The averages are calculated by dividing the sum
of all non-recurring charges applied to service orders issued by DTI to GTE by
the total number of orders or the total number of Service Units ordered. These
calculations will be made by service activity and service category: Business
(Single/Multi-line, Centranet, PBX, Trunks), Residence, etc. The average
Non-Recurring Charges will be separately calculated for field work and non-field
work orders. These averages and a weighting factor for field and non-field work
will be calculated during a study period to be mutually agreed between the
Parties. The initial average Non-Recurring Charge calculation will occur within
three (3) months of DTI's initial issuance of official orders. The average
Non-Recurring Charge shall be recalculated annually as mutually agreed between
the Parties.

Average Recurring Charges - The averages are calculated by dividing the sum of
all recurring charges applied to service orders issued by DTI to GTE by the
total number of orders or Service Units ordered. These averages will be
calculated during a study period to be mutually agreed between the Parties.
These calculations will be made by service activity and service category,
Business, Residence, etc. The initial average Recurring Charge calculation will
occur within three (3) months of DTI's initial issuance of official orders. The
average Recurring Charges shall be recalculated annually as mutually agreed
between the Parties.



                                     A-2
<PAGE>   79









                                     A-3
<PAGE>   80



             GTE PERFORMANCE MEASURES WITH FINANCIAL INCENTIVES

                     PRE-ORDERING/ORDERING/PROVISIONING
<TABLE>
<CAPTION>

- --------------- --------------- ------------------- --------------------- ---------------------- --------------------
ISSUE NO.       OBLIGATION      DATA LEVEL          PERFORMANCE           QUALITY                FINANCIAL
                                                    MEASURE (PM)          STANDARD               INCENTIVE
- --------------- --------------- ------------------- --------------------- ---------------------- --------------------
<S>             <C>             <C>                 <C>                   <C>                    <C>    
1               GTE             National            Prompt transmission   85% of CSR's sent to   5% of average NRC 
                                                    of Customer Service   DTI by the close of    incurred by DTI   
                                                    Record (CSR)          business on business   for the number of 
                                                    Information           day following          CSR's for which   
                                                                          receipt of request     the Quality       
                                                                                                 Standard is not   
                                                                                                 met in the        
                                                                                                 reported month    
- --------------- --------------- ------------------- --------------------- ---------------------- ------------------
2               GTE             National            Prompt transmission   85% of LSC's sent      20% of average NRC
                                                    of Local Service      to DTI by the close of incurred by DTI
                                                    Confirmation (LSC)    business on business   for the lines
                                                                          day following          ordered for which 
                                                                          receipt of request     GTE failed to meet 
                                                                                                 the Quality     
                                                                                                 Standard in the 
                                                                                                 reported month  
                                                                                               
- --------------- --------------- ------------------- --------------------- ---------------------- --------------------
3               GTE             State               Due Date              Percent of DTI         Waiver of the       
                                                    commitments met       customer install,      average NRC         
                                                                          transfer, and change   installation        
                                                                          service orders for     charges for the     
                                                                          which service is       number of lines by  
                                                                          installed by close     which GTE fails to  
                                                                          of business on the     meet the Quality    
                                                                          committed due date     Standard in the     
                                                                          is not more than       reported month      
                                                                          2.5% below the                             
                                                                          percent of GTE                             
                                                                          customer install,                          
                                                                          transfer, and change                       
                                                                          service orders                             
- --------------- --------------- ------------------- --------------------- ---------------------- --------------------
</TABLE>



                                     A-4
<PAGE>   81



<TABLE>
<CAPTION>
- --------------- --------------- ------------------- --------------------- ---------------------- --------------------
ISSUE NO.       OBLIGATION      DATA LEVEL          PERFORMANCE           QUALITY                FINANCIAL
                                                    MEASURE (PM)          STANDARD               INCENTIVE
- --------------- --------------- ------------------- --------------------- ---------------------- --------------------
<S>             <C>             <C>                 <C>                   <C>                    <C>    
4               GTE             State               % reporting trouble   Percent of DTI         One month's          
                                                    within 30 days of     customer install,      average MRC per      
                                                    the date installed    transfer, and change   trouble report       
                                                                          service orders which   exceeding the        
                                                                          are followed by a      Quality Standard     
                                                                          customer trouble       in the reported      
                                                                          report within 30       month (not to        
                                                                          days of service        exceed one month's   
                                                                          order completion       credit per           
                                                                          date is not more       customer line        
                                                                          than 2.5% worse than   month)               
                                                                          the percent GTE                             
                                                                          customer install,                           
                                                                          transfer, and change                        
                                                                          service orders which                        
                                                                          are followed by a                           
                                                                          customer trouble                            
                                                                          report within 30                            
                                                                          days of service                             
                                                                          order completion                            
- --------------- --------------- ------------------- --------------------- ---------------------- -------------------- 
5               GTE             State               Service Order         80% of LSR's           Payment by DTI to   
                                                    discrepancy:  LSR's   initiated by DTI's     GTE equal to 20%    
                                                    issued without        do not contain an      of the average NRC  
                                                    material errors       order discrepancy or   installation        
                                                                          error:  90% in 12      charges for the     
                                                                          months.  Final         number of lines     
                                                                          target - 95%           which DTI fails to  
                                                                                                 meet the Quality    
                                                                                                 Standard in the     
                                                                                                 reported month      
- --------------- --------------- ------------------- --------------------- ---------------------- --------------------

</TABLE>


                                     A-5
<PAGE>   82




<TABLE>
<CAPTION>
                                                         INTERCONNECTION
- --------------- --------------- ------------------ --------------------- --------------------- ----------------------
ISSUE NO.       OBLIGATION      DATA LEVEL         PERFORMANCE           QUALITY                FINANCIAL
                                                   MEASURE (PM)          STANDARD               INCENTIVE
- --------------- --------------- ------------------ --------------------- --------------------- ----------------------
<S>             <C>             <C>                <C>                   <C>                   <C>    
1               GTE             State              Trunk orders          Percent of trunk      Waiver of 100% of    
                                                   completed on or       orders by DTI         average NRC for      
                                                   before the            completed by GTE on   trunks ordered fro   
                                                   Committed Due Date    or before the         which GTE failed to  
                                                                         commitment date is    meet the Quality     
                                                                         not more than 10%     Standard in the      
                                                                         below the percent     reported month       
                                                                         of FG B/D Switched                         
                                                                         access orders by                           
                                                                         all ordering                               
                                                                         companies completed                        
                                                                         by GTE on or before                        
                                                                         the commitment date                        
- --------------- --------------- ------------------ --------------------- --------------------- ----------------------
2               GTE             National           Firm Order            Percent of trunk      Waiver of 20%         
                                                   Confirmation (FOC)    orders by DTI         average of average    
                                                   on time delivery      completed by GTE on   NRC installation for  
                                                                         or before the         trunks for which GTE  
                                                                         commitment date is    failed to meet the    
                                                                         not more than 5%      Quality Standard in   
                                                                         below the percent     the reported month    
                                                                         of FG B/D Switched   
                                                                         access by all                               
                                                                         ordering companies                          
                                                                         for which GTE sends                         
                                                                         FOC (within 5 days,                         
                                                                         or longer , as                              
                                                                         requested by DTI)                           
- --------------- --------------- ------------------ --------------------- --------------------- ----------------------

</TABLE>



                                     A-6
<PAGE>   83


<TABLE>
<CAPTION>
- --------------- --------------- ------------------ --------------------- --------------------- ----------------------
ISSUE NO.       OBLIGATION      DATA LEVEL         PERFORMANCE           QUALITY               FINANCIAL
                                                   MEASURE (PM)          STANDARD              INCENTIVE
- --------------- --------------- ------------------ --------------------- --------------------- ----------------------
<S>             <C>             <C>                <C>                   <C>                   <C>    
3               DTI             National           Service Order         80% of ASR's          Charge equal to 20%
                                                   discrepancy:  ASR's   initiated by DTI do   of average NRC
                                                   issued without        not contain           installation of
                                                   material errors       material error or     trunks ordered for
                                                                         result in             which DTI failed to
                                                                         discrepancy; 90% in   meet the Quality
                                                                         12 months.  Final     Standard in the
                                                                         target 95%            reported month
- --------------- --------------- ------------------ --------------------- --------------------- ----------------------

</TABLE>


                                     A-7
<PAGE>   84



<TABLE>
<CAPTION>
                                                        MAINTENANCE/REPAIR
- --------------- --------------- ------------------ --------------------- --------------------- ----------------------
ISSUE NO.       OBLIGATION      DATA LEVEL         PERFORMANCE           QUALITY               FINANCIAL
                                                   MEASURE (PM)          STANDARD              INCENTIVE
- --------------- --------------- ------------------ --------------------- --------------------- ----------------------
<S>             <C>             <C>                <C>                   <C>                   <C>    
1               GTE             State              Percent Commitments   Percent of DTI        One month's flat     
                                                   Met                   customer Network      rate average MRC per 
                                                                         trouble reports       line out of service  
                                                                         where commitment      for which Quality    
                                                                         was meet more than    Standard is not met  
                                                                         2.5% worse than the   in the reported month
                                                                         percent of GTE's
                                                                         customer Network
                                                                         trouble reports                            
                                                                         where commitment                           
                                                                         was met (excluding                         
                                                                         reports which are                          
                                                                         cleared CPE, DTI                           
                                                                         customer error)                            
- --------------- --------------- ------------------ --------------------- --------------------- ----------------------

</TABLE>



                                     A-8
<PAGE>   85


<TABLE>
<CAPTION>
- --------------- --------------- ------------------ --------------------- --------------------- ----------------------
ISSUE NO.       OBLIGATION      DATA LEVEL         PERFORMANCE           QUALITY               FINANCIAL
                                                   MEASURE (PM)          STANDARD              INCENTIVE
- --------------- --------------- ------------------ --------------------- --------------------- ----------------------
<S>             <C>           <C>               <C>                    <C>                     <C>    
2               GTE             State              Average clearing      Average repair time   One month's flat        
                                                   time - Out of         (total number of      rate average MRC per    
                                                   Service (OOS) -       elapsed hours/        line OOS for which      
                                                   Designed              minutes for OOS DTI   Quality Standard is     
                                                                         customer Network      not met in the          
                                                                         trouble reports       reported month          
                                                                         divided by total
                                                                         number OOS customer
                                                                         Network trouble
                                                                         reports) for DTI
                                                                         customers is more                             
                                                                         than 10% of the                               
                                                                         average repair time                           
                                                                         for GTE customers                             
                                                                         (includes only                                
                                                                         "Designed" services)                          
- --------------- --------------- ------------------ --------------------- --------------------- ----------------------

</TABLE>


                                     A-9
<PAGE>   86


<TABLE>
<CAPTION>
- --------------- --------------- ------------------ --------------------- --------------------- ----------------------
ISSUE NO.       OBLIGATION      DATA LEVEL         PERFORMANCE           QUALITY               FINANCIAL
                                                   MEASURE (PM)          STANDARD              INCENTIVE
- --------------- --------------- ------------------ --------------------- --------------------- ----------------------
<S>             <C>           <C>               <C>                    <C>                     <C>    
3               GTE             State              Average clearing      Average repair time   One month's flat         
                                                   time - Out of         (total number of      rate average MRC per     
                                                   Service (OOS) -       elapsed               line OOS for which       
                                                   Non-Designed          hours/minutes for     Quality Standard is      
                                                                         OOS DTI customer      not met in the           
                                                                         Network trouble       reported month           
                                                                         reports divided by
                                                                         total number OOS
                                                                         customer Network
                                                                         trouble reports)
                                                                         for DTI customers
                                                                         is more than 10% of
                                                                         the average repair
                                                                         time for GTE                                   
                                                                         customers (includes                            
                                                                         only POTS and                                  
                                                                         circuits which do                              
                                                                         not require a                                  
                                                                         design)                                        
- --------------- --------------- ------------------ --------------------- --------------------- ----------------------
4               GTE             State              Percent reports per   Percent of DTI         Within six (6)
                                                   100 (Failure          customers making      months of effective
                                                   Frequency)            trouble reports       date, GTE will have
                                                                         (total number of      established a
                                                                         DTI customer          minimum access line
                                                                         Network trouble       threshold.
                                                                         reports divided by    
                                                                         the total access      One month's flat               
                                                                         lines multiplied by   rate average MRC per           
                                                                         100) is not worse     line OOS for which             
                                                                         than .5 percent       Quality Standard is            
                                                                         points of the         not met in the                 
                                                                         percentage of GTE     reported month.                  
                                                                         customers making                           
                                                                         trouble reports                            
                                                                                                                    
- --------------- --------------- ------------------ --------------------- --------------------- ----------------------
</TABLE>



                                     A-10
<PAGE>   87



<TABLE>
<CAPTION>
- --------------- --------------- ------------------ --------------------- --------------------- ----------------------
ISSUE NO.       OBLIGATION      DATA LEVEL         PERFORMANCE           QUALITY               FINANCIAL
                                                   MEASURE (PM)          STANDARD              INCENTIVE
- --------------- --------------- ------------------ --------------------- --------------------- ----------------------
<S>             <C>           <C>               <C>                    <C>                     <C>    
5               GTE             State              Percent repeat        Percent of DTI        One month's flat     
                                                   reports in 30 days    customer repeat       rate average MRC per 
                                                                         trouble reports       line OOS for which   
                                                                         (total number of      Quality Standard is  
                                                                         DTI customer          not met in the       
                                                                         Network trouble       reported month       
                                                                         reports which had a  
                                                                         previous Network     
                                                                         trouble report       
                                                                         within the last 30   
                                                                         days divided by the  
                                                                         total of customer    
                                                                         Network trouble      
                                                                         reports multiplied   
                                                                         by 100) is not more                        
                                                                         than 2.5% worse                            
                                                                         than the percent of                        
                                                                         GTE customer repeat                        
                                                                         trouble reports                            
- --------------- --------------- ------------------ --------------------- --------------------- ----------------------

</TABLE>

**NOTE: OUTAGE CREDITS: LOCAL SERVICE AND UNBUNDLED NETWORK ELEMENTS: OUTAGE
CREDITS APPLY TO INTERRUPTIONS OF LOCAL SERVICES AND UNBUNDLED NETWORK ELEMENTS
IN ACCORDANCE WITH APPLICABLE STATE PUBLIC SERVICE COMMISSION REQUIREMENTS. IF A
LOCAL SERVICE OR UNBUNDLED NETWORK ELEMENT IS INTERRUPTED, DTI WILL BE ENTITLED
TO OUTAGE CREDITS. AN INTERRUPTION PERIOD BEGINS WHEN DTI REPORTS TO GTE THAT A
LOCAL SERVICE OR UNBUNDLED NETWORK ELEMENT IS INTERRUPTED (OR GTE HAS KNOWLEDGE
THAT AN INTERRUPTION HAS OCCURRED THROUGH SERVICE MONITORING OR OTHER MEANS). AN
INTERRUPTION PERIOD ENDS WHEN THE LOCAL SERVICE IS REPAIRED AND RETURNED TO DTI.
A LOCAL SERVICE OR UNBUNDLED NETWORK ELEMENT IS CONSIDERED TO BE INTERRUPTED
WHEN THERE HAS BEEN A LOSS OF CONTINUITY, THE LOCAL SERVICE OR UNBUNDLED NETWORK
ELEMENT DOES NOT OPERATE IN ACCORDANCE WITH THE APPLICABLE SERVICE STANDARDS, OR
IT IS OTHERWISE UNAVAILABLE FOR USE BY DTI. THIS DEFINITION IS NOT INTENDED TO
CONFLICT WITH STATE PUBLIC UTILITY COMMISSION REQUIREMENTS.



                                     A-11
<PAGE>   88



                                   FORECASTING

<TABLE>
<CAPTION>
- --------------- --------------- ----------------- ---------------------- --------------------- ----------------------
ISSUE NO.       OBLIGATION      DATA LEVEL        PERFORMANCE              QUALITY              FINANCIAL
                                                  MEASURE (PM)           STANDARD              INCENTIVE
- --------------- --------------- ----------------- ---------------------- --------------------- ----------------------
<S>             <C>           <C>               <C>                    <C>                     <C>    
1               DTI             State             Service Units          Volume of DTI's       20% of the average 
                                                  requirements           Service Units         NRC for the number of 
                                                  accurately forecast    requirements in a     service units below the
                                                  all volumes for each   month is not          forecast when the 
                                                  month contained in     greater than 10%      actual volumes are
                                                  the quarterly report.  below the amount      greater than 10% 
                                                                         forecast by DTI in    and less than or
                                                                         it's most recent      equal to 30% under 
                                                                         quarterly forecast    forecast. 40% of
                                                                         (which shall have     the average NRC for 
                                                                         been made not later   the number of
                                                                         than 30 days prior    service units below
                                                                         to the quarter in     the forecast when
                                                                         question)             the actual volumes
                                                                                               are greater than 30%
                                                                                               and less than or
                                                                                               equal to 40% under
                                                                                               the forecast.  50%
                                                                                               of the average NRC
                                                                                               for the number of 
                                                                                               service units below
                                                                                               the forecast when the 
                                                                                               actual volumes are over
                                                                                               40% under the forecast.
- --------------- --------------- ----------------- ---------------------- --------------------- ----------------------

</TABLE>



                                     A-12

<PAGE>   89




                                  APPENDIX B
                                SERVICE MATRIX



Date                       
    ------------------

<TABLE>
<CAPTION>
           Service Location
    (identified by tandem serving                        IP                                  Services
                area)                         (identified by CLLI code)           (identified by                )
                                                                                                 ---------------
- --------------------------------------- -------------------------------------- --------------------------------------
<S>                                        <C>                                 <C>
TO BE DETERMINED                              TO BE DETERMINED                                 TO BE DETERMINED

</TABLE>




                                     B-1
<PAGE>   90




                                  APPENDIX C
                 INTERCONNECTION, TELECOMMUNICATIONS SERVICES
                           AND FACILITIES AGREEMENT

                                   BETWEEN

                          GTE ARKANSAS INCORPORATED
                           GTE MIDWEST INCORPORATED

                                     AND

                            DIGITAL TELEPORT, INC.

                                AMENDMENT NO.


THIS AMENDMENT (herein so called) is made effective as of __________________, 
199__ , by and between GTE Arkansas Incorporated/GTE Midwest Incorporated 
("GTE") and Digital Teleport, Inc. ("DTI"). GTE and DTI are sometimes referred 
to herein collectively as the "Parties" and individually as a "Party." Either 
GTE or DTI may be referred to as "Provider" or "Customer" as the context 
requires.

WHEREAS, Provider is providing to Customer and Customer is purchasing from 
Provider those Services described in that certain Interconnection, 
Telecommunications Services and Facilities Agreement for the State of
_______________ by and between GTE and DTI dated effective as of 
______________, 199__ (the "Agreement"); and

WHEREAS, the Parties desire to amend the Agreement as provided in this
Amendment.

NOW, THEREFORE, in consideration of the terms and conditions contained in this
Amendment, the Parties agree as follows:

1.

2.       ADDITIONAL SERVICES [IF APPLICABLE]

2.1      Provider agrees to provide to Customer and Customer agrees to purchase
         from Provider the following services under the terms and conditions set
         forth in the Agreement and within the service attachment listed below
         and attached to this Amendment:

                  Service Attachment _______  - ________________________

2.2      As of the effective date of this Amendment, and continuing through the
         remaining term of the Agreement, ___________________is made a part of 
         the Services provided under the Agreement and Service Attachment
         ___________________shall be deemed to be a Service Attachment to the 
         Agreement.

2.3      As of the effective date of this Amendment, and continuing through the
         remaining term of the Agreement, Appendix B, Service Matrix, to the
         Agreement is hereby deleted and Appendix B, Service Matrix, to this
         Amendment is hereby inserted in lieu thereof to reflect the additional
         Services and related Service Locations.


                                     C-1
<PAGE>   91


3.       SERVICE LOCATIONS [IF APPLICABLE]

3.1      Provider agrees to provide to Customer and Customer agrees to purchase
         from Provider the following Services in the following locations:





                                     C-2
<PAGE>   92









                                                                               
   Service Location                                              Services       
 (identified by tandem               IP                   (identified by Service
    serving area)         (identified by CLLI code)         Attachment Number) 
- --------------------------------------------------------------------------------


3.2      As of the effective date of this Amendment, the locations set forth in
         Section 3.1 above shall be deemed Service Locations under the
         Agreement.

3.3      As of the effective date of this Amendment, and continuing through the
         remaining term of the Agreement, Appendix B, Service Matrix, to the
         Agreement is hereby deleted and Appendix B, Service Matrix, to this
         Amendment is hereby inserted in lieu thereof to reflect additional
         Service Locations.

4.       INTERPRETATION

         All capitalized terms used but not defined herein shall have the 
         meanings ascribed to such terms in the Agreement.

5.       EFFECT

         Except as modified herein, the Agreement shall remain in full force and
         effect.

6.       AUTHORITY

         Each person whose signature appears below represents and warrants that
         he or she has the authority to bind the Party on whose behalf he or she
         has executed this Amendment.

7.       MULTIPLE COUNTERPARTS

         This Amendment may be executed in multiple counterparts, each of which
         shall be deemed an original, and all of which shall constitute but one
         and the same instrument.

8.       NO OFFER

         Submission of this Amendment for examination or signature does not
         constitute an offer by Provider for the provision of the products or
         services described herein. This Amendment will be effective only upon
         execution by both Provider and Customer.



                                     C-3
<PAGE>   93



IN WITNESS WHEREOF, the Parties have executed this Amendment on the date or
dates written below effective as of the date first above written.

GTE ARKANSAS INCORPORATED                   DIGITAL TELEPORT, INC.
GTE MIDWEST INCORPORATED                 
                                         
                                         
By                                          By
  -------------------------------             ------------------------------
Name                                        Name
    -----------------------------               ----------------------------
                                         
Title                                       Title
     ----------------------------                ---------------------------
                                         
Date                                        Date
    -----------------------------               ----------------------------
                                         



                                     C-4

<PAGE>   94




                                  APPENDIX D
                            RATES AND CHARGES FOR
                     TRANSPORT AND TERMINATION OF TRAFFIC

                                       
General. The rates contained in this Appendix D are the rates as defined in
Article V and are subject to change resulting from future Commission or other
proceedings, including but not limited to any generic proceeding to determine
GTE's unrecovered costs (e.g., historic costs, contribution, undepreciated
reserve deficiency, or similar unrecovered GTE costs (including GTE's interim
Universal Service Support Surcharge)), the establishment of a competitively
neutral universal service system, or any appeal or other litigation.

Each Party will bill the other Party as appropriate:

         A.       The Local Interconnection rate element that applies to Local
                  Traffic on a minute of use basis that each Party switches for
                  termination purposes at its wire centers. The local
                  interconnection rate is $0.0056564.

         B.       The Tandem Switching rate element that applies to tandem
                  routed Local Traffic on a minute of use basis. This rate
                  includes tandem transport, but does not include the local
                  interconnection charge. The tandem switching rate is
                  $0.0006351.

         C.       The Common Transport Facility rate element that applies to
                  tandem routed Local Traffic on a per minute/per mile basis.
                  The Common Transport Facility rate is $0.0000106.

         D.       The Common Transport Terminal element that applies to tandem
                  routed Local Traffic on a per minute/per termination basis.
                  The Common Transport Termination rate is $0.0001333.





                                     D-1
<PAGE>   95


                                   APPENDIX E
            RATES AND CHARGES FOR LOCAL NUMBER PORTABILITY USING RCF


General. The rates contained in this Appendix E are as defined in Article V,
Section 7, and are subject to change resulting from future Commission or other
proceedings, including but not limited to any generic proceeding to determine
GTE's unrecovered costs (e.g., historic costs, contribution, undepreciated
reserve deficiency, or similar unrecovered GTE costs (including GTE's interim
Universal Service Support Surcharge)), the establishment of a competitively
neutral universal service system, or any appeal or other litigation.

In addition, as defined in Article V, Section 3.2.3, the Party providing the
ported number will pay the other Party the rate per line per month for each
ported business line and the rate per line per month for each ported residential
line for the sharing of Access Charges on calls to ported numbers.

     Business Rate Per Line Per Month:                         $ 4.72

     Residential Rate Per Line Per Month:                      $ 2.60

SERVICE NUMBER PORTABILITY

Remote Call Forwarding                                         $ 4.60 line/month

Simultaneous Call Capability                                   $ 3.40 path/month

Non-recurring for Portability                                  $10.50




                                      E-1

<PAGE>   96




                                   APPENDIX F
                          SERVICES AVAILABLE FOR RESALE


General. The rates contained in this Appendix F are based upon an avoided cost
discount from GTE's retail rates as provided in Article VI, Section 5.3 of the
Agreement to which this Appendix F is attached and are subject to change
resulting from future Commission or other proceedings, including but not limited
to any generic proceeding to determine GTE's unrecovered costs (e.g., historic
costs, contribution, undepreciated reserve deficiency, or similar unrecovered
GTE costs (including GTE's interim Universal Service Support Surcharge)), the
establishment of a competitively neutral universal service system, or any appeal
or other litigation.

NON-RECURRING CHARGES FOR RESALE SERVICES

     Initial Service Order, per order                              $41.50
     Subsequent Service Order, per order                           $24.00

     Installation, per line                                        $28.75
     Outside Facility Connection Charge, per order*                $Tariffed

*This charge will apply when field work is required for establishment of new
resale service. The terms, conditions and rates that apply for this work are
described in GTE's retail local service tariffs.










                                       F-1
<PAGE>   97
Issue Date:  06/26/97

                      GTE TELEPHONE OPERATIONS HEADQUARTERS
                 RESALE PRODUCTS & SERVICES - STATE OF OKLAHOMA
                          GTESW EXCHANGE NETWORK TARIFF
<TABLE>
<CAPTION>

                                                                                            BILLING     RESALE      DISCOUNT     
 ST      CO     SEC                 SERVICE DESCRIPTION                                      TYPE      POSITION     POSITION     
 --      --     ---                 -------------------                                      ----      --------     --------     
<S>     <C>     <C>   <C>                                                                    <C>        <C>         <C>            
                  5    BASIC LOCAL EXCHANGE SERVICES:
                          SCHEDULE A STRUCTURE - RATE GROUP 1 - FLAT RATE SERVICE
OK      GTE                  Business:
OK      GTE                     One Party                                                     MRC         Yes         Yes        
OK      GTE                     Manual Trunk                                                  MRC         Yes         Yes        
OK      GTE                     Automatic Trunk                                               MRC         Yes         Yes        
OK      GTE                  Residence:
OK      GTE                     One Party                                                     MRC         No           No        
                          SCHEDULE A STRUCTURE - RATE GROUP 2 - FLAT RATE SERVICE
                             Business:
OK      GTE                     One Party                                                     MRC         Yes         Yes        
OK      GTE                     Manual Trunk                                                  MRC         Yes         Yes        
OK      GTE                     Automatic Trunk                                               MRC         Yes         Yes        
                             Residence:
OK      GTE                     One Party                                                     MRC         No           No        
                          SCHEDULE A STRUCTURE - RATE GROUP 3 - FLAT RATE SERVICE
                             Business:
OK      GTE                     One Party                                                     MRC         Yes         Yes        
OK      GTE                     Manual Trunk                                                  MRC         Yes         Yes        
OK      GTE                     Automatic Trunk                                               MRC         Yes         Yes        
                            Residence:
OK      GTE                     One Party                                                     MRC         No           No        
OK      GTE               SCHEDULE A NETWORK MODERNIZATION SURCHARGE (PER ACCESS LINE)        MRC         Yes          No        
                          SCHEDULE B STRUCTURE - RATE GROUP 1 - FLAT RATE SERVICE

</TABLE>

<TABLE>
<CAPTION>

                                                                                               RETAIL      AVOIDED       RESALE
 ST      CO     SEC                 SERVICE DESCRIPTION                                         RATE         COST         RATE
 --      --     ---                 -------------------                                         ----         ----         ----
<S>     <C>     <C>   <C>                                                                       <C>           <C>        <C>       
                  5    BASIC LOCAL EXCHANGE SERVICES:
                          SCHEDULE A STRUCTURE - RATE GROUP 1 - FLAT RATE SERVICE
OK      GTE                  Business:
OK      GTE                     One Party                                                         $24.25       $2.65        $21.60
OK      GTE                     Manual Trunk                                                      $24.25       $2.65        $21.60
OK      GTE                     Automatic Trunk                                                   $24.25       $2.65        $21.60
OK      GTE                  Residence:
OK      GTE                     One Party                                                         $11.80         N/A           N/A
                          SCHEDULE A STRUCTURE - RATE GROUP 2 - FLAT RATE SERVICE
                             Business:
OK      GTE                     One Party                                                         $27.30       $2.98        $24.32
OK      GTE                     Manual Trunk                                                      $27.30       $2.98        $24.32
OK      GTE                     Automatic Trunk                                                   $27.30       $2.98        $24.32
                             Residence:
OK      GTE                     One Party                                                         $12.90         N/A           N/A
                          SCHEDULE A STRUCTURE - RATE GROUP 3 - FLAT RATE SERVICE
                             Business:
OK      GTE                     One Party                                                         $35.63       $3.89        $31.74
OK      GTE                     Manual Trunk                                                      $35.63       $3.89        $31.74
OK      GTE                     Automatic Trunk                                                   $35.63       $3.89        $31.74
                            Residence:
OK      GTE                     One Party                                                         $12.97         N/A           N/A
OK      GTE               Schedule A Network Modernization Surcharge (per access line)             $1.86         n/a         $1.86
                          SCHEDULE B STRUCTURE - RATE GROUP 1 - FLAT RATE SERVICE
</TABLE>

                                     Page 1

<PAGE>   98

                      GTE TELEPHONE OPERATIONS HEADQUARTERS
                 RESALE PRODUCTS & SERVICES - STATE OF OKLAHOMA
                          GTESW EXCHANGE NETWORK TARIFF
<TABLE>
<CAPTION>                                                                               BILLING     RESALE      DISCOUNT
 ST      CO     SEC                 SERVICE DESCRIPTION                                  TYPE      POSITION     POSITION     
 --      --     ---                 -------------------                                   ----      --------     --------    
<S>     <C>     <C>   <C>                                                                 <C>        <C>         <C>               
                             Business:
OK      GTE                     One Party                                                   MRC         Yes         Yes        
OK      GTE                     Rural Four Party                                            MRC         Yes         Yes        
OK      GTE                     Manual Trunk                                                MRC         Yes         Yes        
OK      GTE                     Automatic Trunk                                             MRC         Yes         Yes        
                             Residence:                                                   
OK      GTE                     One Party                                                   MRC         No           No        
                                Two Party                                                   MRC         No           No        
                          SCHEDULE B STRUCTURE - RATE GROUP 2 - FLAT RATE SERVICE         
OK      GTE                  Business:                                              
OK      GTE                     One Party                                                   MRC         Yes         Yes      
OK      GTE                     Rural Four Party                                            MRC         Yes         Yes      
OK      GTE                     Manual Trunk                                                MRC         Yes         Yes      
OK      GTE                     Automatic Trunk                                             MRC         Yes         Yes      
                            Residence:
OK      GTE                     One Party                                                   MRC         No           No      
OK      GTE                     Two Party                                                   MRC         No           No      
                          SCHEDULE B STRUCTURE - RATE GROUP 3 - FLAT RATE SERVICE
                             Business:
OK      GTE                     One Party                                                   MRC         Yes         Yes      
OK      GTE                     Rural Four Party                                            MRC         Yes         Yes      
OK      GTE                     Manual Trunk                                                MRC         Yes         Yes      
OK      GTE                     Automatic Trunk                                             MRC         Yes         Yes      
                            Residence:
OK      GTE                     One Party                                                   MRC         No           No      
OK      GTE                     Two Party                                                   MRC         No           No      

</TABLE>

<TABLE>
<CAPTION>
                                                                                            RETAIL       AVOIDED       RESALE
 ST      CO     SEC                 SERVICE DESCRIPTION                                      RATE          COST         RATE
 --      --     ---                 -------------------                                      ------       ------       -------
<S>     <C>     <C>   <C>                                                                     <C>          <C>           <C>       
                             Business:
OK      GTE                     One Party                                                     $24.25       $2.65        $21.60
OK      GTE                     Rural Four Party                                              $23.45       $2.56        $20.89
OK      GTE                     Manual Trunk                                                  $24.25       $2.65        $21.60
OK      GTE                     Automatic Trunk                                               $24.25       $2.65        $21.60
                             Residence:                                            
OK      GTE                     One Party                                                     $11.80         N/A           N/A
                                Two Party                                                     $10.65         N/A           N/A
                          SCHEDULE B STRUCTURE - RATE GROUP 2 - FLAT RATE SERVICE  
OK      GTE                  Business:                                              
OK      GTE                     One Party                                                     $27.30       $2.98        $24.32
OK      GTE                     Rural Four Party                                              $25.70       $2.81        $22.89
OK      GTE                     Manual Trunk                                                  $27.30       $2.98        $24.32
OK      GTE                     Automatic Trunk                                               $27.30       $2.98        $24.32
                            Residence:
OK      GTE                     One Party                                                     $12.90         N/A           N/A
OK      GTE                     Two Party                                                     $11.60         N/A           N/A
                          SCHEDULE B STRUCTURE - RATE GROUP 3 - FLAT RATE SERVICE
                             Business:
OK      GTE                     One Party                                                     $36.09       $3.94        $32.15
OK      GTE                     Rural Four Party                                              $33.82       $3.70        $30.12
OK      GTE                     Manual Trunk                                                  $36.09       $3.94        $32.15
OK      GTE                     Automatic Trunk                                               $36.09       $3.94        $32.15
                            Residence:
OK      GTE                     One Party                                                     $12.97         N/A           N/A
OK      GTE                     Two Party                                                     $11.62         N/A           N/A
</TABLE>

                                     Page 2
<PAGE>   99
                     GTE TELEPHONE OPERATIONS HEADQUARTERS
                 RESALE PRODUCTS & SERVICES - STATE OF OKLAHOMA
                          GTESW EXCHANGE NETWORK TARIFF
<TABLE>
<CAPTION>
                                                                                                BILLING     RESALE      DISCOUNT   
 ST      CO     SEC                 SERVICE DESCRIPTION                                          TYPE      POSITION     POSITION   
 --      --     ---                 -------------------                                          ----      --------     --------   
<S>     <C>     <C>       <C>                                                                   <C>         <C>          <C>       
                          OPTIONAL MEASURED SERVICE:                                                                               
                             Metro:                                                                                                
OK      GTE                     Business Access Line                                                MRC         Yes         Yes    
OK      GTE                     Residence Access Line                                               MRC         No           No    
                             Non-Metro:                                                                                            
OK      GTE                     Business Access Line                                                MRC         Yes         Yes    
OK      GTE                     Residence Access Line                                               MRC         No           No    
                             Detail Billing Option:                                                                                
OK      GTE                     Subscription Fee                                                    MRC         No           No    
OK      GTE                     Charge per Bill Page                                               USAGE        No           No    
OK      GTE                     Associate Number Non-Aggregation                                    MRC         No           No    
                            Local Usage:  (See Footnote:  5)                                                                       
OK      GTE                     Day Rate - Home Exchange - Initial Minute Charge                   USAGE        Yes         Yes    
OK      GTE                     Day Rate - 0 to 7 Miles - Initial Minute Charge                    USAGE        Yes         Yes    
OK      GTE                     Day Rate - 8 to 14 Miles - Initial Minute Charge                   USAGE        Yes         Yes    
OK      GTE                     Day Rate - 15 to 21 Miles - Initial Minute Charge                  USAGE        Yes         Yes    
OK      GTE                     Day Rate - 21 to 28 Miles - Initial Minute Charge                  USAGE        Yes         Yes    
OK      GTE                     Day Rate - Over 28 Miles - Initial Minute Charge                   USAGE        Yes         Yes    
OK      GTE                     Night/Weekend Rate - Home Exchange - Initial Minute Charge         USAGE        Yes         Yes    
OK      GTE                     Night/Weekend Rate - 0 to 7 Miles - Initial Minute Charge          USAGE        Yes         Yes    
OK      GTE                     Night/Weekend Rate - 8 to 14 Miles - Initial Minute Charge         USAGE        Yes         Yes    
OK      GTE                     Night/Weekend Rate - 15 to 21 Miles - Initial Minute Charge        USAGE        Yes         Yes    
OK      GTE                     Night/Weekend Rate - 21 to 28 Miles - Initial Minute Charge        USAGE        Yes         Yes    
OK      GTE                     Night/Weekend Rate - Over 28 Miles - Initial Minute Charge         USAGE        Yes         Yes    
OK      GTE                     Day Rate - Home Exchange - Each Additional Minute Charge           USAGE        Yes         Yes    
OK      GTE                     Day Rate - 0 to 7 Miles - Each Additional Minute Charge            USAGE        Yes         Yes    
OK      GTE                     Day Rate - 8 to 14 Miles - Each Additional Minute Charge           USAGE        Yes         Yes    
OK      GTE                     Day Rate - 15 to 21 Miles - Each Additional Minute Charge          USAGE        Yes         Yes    
</TABLE> 

<TABLE>
<CAPTION>
                                                                                                RETAIL       AVOIDED       RESALE
 ST      CO     SEC                 SERVICE DESCRIPTION                                          RATE         COST          RATE
 --      --     ---                 -------------------                                         ------       -------       -------
<S>     <C>     <C>       <C>                                                                  <C>            <C>           <C>    
                          OPTIONAL MEASURED SERVICE:
                             Metro:
OK      GTE                     Business Access Line                                             $18.00       $1.97        $16.03
OK      GTE                     Residence Access Line                                             $6.50         N/A           N/A
                             Non-Metro:
OK      GTE                     Business Access Line                                             $14.00       $1.53        $12.47
OK      GTE                     Residence Access Line                                             $5.80         N/A           N/A
                             Detail Billing Option:
OK      GTE                     Subscription Fee                                                  $1.00         N/A           N/A
OK      GTE                     Charge per Bill Page                                              $0.20         N/A           N/A
OK      GTE                     Associate Number Non-Aggregation                                  $1.00         N/A           N/A
                            Local Usage:  (See Footnote:  5)
OK      GTE                     Day Rate - Home Exchange - Initial Minute Charge                 $0.041      $0.004        $0.037
OK      GTE                     Day Rate - 0 to 7 Miles - Initial Minute Charge                  $0.051      $0.006        $0.045
OK      GTE                     Day Rate - 8 to 14 Miles - Initial Minute Charge                 $0.071      $0.008        $0.063
OK      GTE                     Day Rate - 15 to 21 Miles - Initial Minute Charge                $0.091      $0.010        $0.081
OK      GTE                     Day Rate - 21 to 28 Miles - Initial Minute Charge                $0.111      $0.012        $0.099
OK      GTE                     Day Rate - Over 28 Miles - Initial Minute Charge                 $0.130      $0.014        $0.116
OK      GTE                     Night/Weekend Rate - Home Exchange - Initial Minute Charge       $0.025      $0.003        $0.022
OK      GTE                     Night/Weekend Rate - 0 to 7 Miles - Initial Minute Charge        $0.031      $0.003        $0.028
OK      GTE                     Night/Weekend Rate - 8 to 14 Miles - Initial Minute Charge       $0.043      $0.005        $0.038
OK      GTE                     Night/Weekend Rate - 15 to 21 Miles - Initial Minute Charge      $0.055      $0.006        $0.049
OK      GTE                     Night/Weekend Rate - 21 to 28 Miles - Initial Minute Charge      $0.067      $0.007        $0.060
OK      GTE                     Night/Weekend Rate - Over 28 Miles - Initial Minute Charge       $0.078      $0.009        $0.069
OK      GTE                     Day Rate - Home Exchange - Each Additional Minute Charge         $0.016      $0.002        $0.014
OK      GTE                     Day Rate - 0 to 7 Miles - Each Additional Minute Charge          $0.020      $0.002        $0.018
OK      GTE                     Day Rate - 8 to 14 Miles - Each Additional Minute Charge         $0.028      $0.003        $0.025
OK      GTE                     Day Rate - 15 to 21 Miles - Each Additional Minute Charge        $0.036      $0.004        $0.032
</TABLE>


                                     Page 3
<PAGE>   100
                                    
                    GTE TELEPHONE OPERATIONS HEADQUARTERS
                 RESALE PRODUCTS & SERVICES - STATE OF OKLAHOMA
                          GTESW EXCHANGE NETWORK TARIFF

<TABLE>
<CAPTION>
                                                                                                   BILLING     RESALE      DISCOUNT
 ST      CO     SEC                 SERVICE DESCRIPTION                                             TYPE      POSITION     POSITION
 --      --     ---                 -------------------                                             ----      --------     --------
<S>     <C>     <C>    <C>                                                                         <C>         <C>          <C>    
                                                                                                                                   
OK      GTE                     Day Rate - 21 to 28 Miles - Each Additional Minute Charge             USAGE        Yes         Yes 
OK      GTE                     Day Rate - Over 28 Miles - Each Additional Minute Charge              USAGE        Yes         Yes 
OK      GTE                     Night/Weekend Rate - Home Exchange - Each Additional Minute           USAGE        Yes         Yes 
OK      GTE                     Night/Weekend Rate - 0 to 7 Miles - Each Additional Minute Char       USAGE        Yes         Yes 
OK      GTE                     Night/Weekend Rate - 8 to 14 Miles - Each Additional Minute Cha       USAGE        Yes         Yes 
OK      GTE                     Night/Weekend Rate - 15 to 21 Miles - Each Additional Minute Ch       USAGE        Yes         Yes 
OK      GTE                     Night/Weekend Rate - 21 to 28 Miles - Each Additional Minute Ch       USAGE        Yes         Yes 
OK      GTE                     Night/Weekend Rate - Over 28 Miles - Each Additional Minute Ch        USAGE        Yes         Yes 
OK      GTE            CENTRAL OFFICE BRIDGING FOR FIRE BAR                                            MRC         Yes          No 
                  7    DIRECTORY LISTINGS:                                                                                         
                             Business                                                                                              
OK      GTE                     Additional Listing                                                     MRC         No           No 
OK      GTE                     NonPublish Service                                                     MRC         No           No 
                             Residence:                                                                                            
OK      GTE                     Additional Listing                                                     MRC         No           No 
OK      GTE                     NonPublish Service                                                     MRC         No           No 
OK      GTE                     Family Plan                                                            MRC         No           No 
                  9    MISCELLANEOUS SERVICES:                                                                                     
OK      GTE               Rotary Hunting Line Charge                                                   MRC         Yes         Yes 
OK      GTE               Multiple Copies of Customer Bills                                            MRC         No           No 
OK      GTE               Special Billing Numbers (incremenets of 1-25 numbers)                        MRC         No           No 
OK      GTE               DID Trunk Termination                                                        MRC         Yes         Yes 
OK      GTE               DID Trunk Termination                                                        NRC         Yes          No 
OK      GTE               DID - Block of 20 Numbers                                                    MRC         Yes         Yes 
OK      GTE               DID - Block of 100 Numbers                                                   MRC         Yes         Yes 
</TABLE>

<TABLE>
<CAPTION>
                                                                                                   RETAIL       AVOIDED       RESALE
 ST      CO     SEC                 SERVICE DESCRIPTION                                             RATE         COST          RATE
 --      --     ---                 -------------------                                            ------       -------       ------
<S>     <C>     <C>    <C>                                                                        <C>         <C>           <C> 
OK      GTE                     Day Rate - 21 to 28 Miles - Each Additional Minute Charge           $0.044      $0.005        $0.039
OK      GTE                     Day Rate - Over 28 Miles - Each Additional Minute Charge            $0.051      $0.006        $0.045
OK      GTE                     Night/Weekend Rate - Home Exchange - Each Additional Minute         $0.010      $0.001        $0.009
OK      GTE                     Night/Weekend Rate - 0 to 7 Miles - Each Additional Minute Char     $0.012      $0.001        $0.011
OK      GTE                     Night/Weekend Rate - 8 to 14 Miles - Each Additional Minute Cha     $0.017      $0.002        $0.015
OK      GTE                     Night/Weekend Rate - 15 to 21 Miles - Each Additional Minute Ch     $0.022      $0.002        $0.020
OK      GTE                     Night/Weekend Rate - 21 to 28 Miles - Each Additional Minute Ch     $0.026      $0.003        $0.023
OK      GTE                     Night/Weekend Rate - Over 28 Miles - Each Additional Minute Ch      $0.031      $0.003        $0.028
OK      GTE            CENTRAL OFFICE BRIDGING FOR FIRE BAR                                          $1.00         N/A         $1.00
                  7    DIRECTORY LISTINGS:
                             Business
OK      GTE                     Additional Listing                                                   $1.25         N/A           N/A
OK      GTE                     NonPublish Service                                                   $1.90         N/A           N/A
                             Residence:
OK      GTE                     Additional Listing                                                   $0.60         N/A           N/A
OK      GTE                     NonPublish Service                                                   $1.90         N/A           N/A
OK      GTE                     Family Plan                                                          $0.75         N/A           N/A
                  9    MISCELLANEOUS SERVICES:
OK      GTE               Rotary Hunting Line Charge                                                 $2.90       $0.32         $2.58
OK      GTE               Multiple Copies of Customer Bills                                          $1.00         N/A           N/A
OK      GTE               Special Billing Numbers (incremenets of 1-25 numbers)                      $3.15         N/A           N/A
OK      GTE               DID Trunk Termination                                                     $25.00       $2.73        $22.27
OK      GTE               DID Trunk Termination                                                    $150.00         N/A       $150.00
OK      GTE               DID - Block of 20 Numbers                                                  $8.00       $0.87         $7.13
OK      GTE               DID - Block of 100 Numbers                                                $22.00       $2.40        $19.60
</TABLE>


                                     Page 4
<PAGE>   101
                                     
                    GTE TELEPHONE OPERATIONS HEADQUARTERS
                 RESALE PRODUCTS & SERVICES - STATE OF OKLAHOMA
                          GTESW EXCHANGE NETWORK TARIFF
<TABLE>
<CAPTION>
                                                                                               BILLING     RESALE      DISCOUNT   
 ST      CO     SEC                 SERVICE DESCRIPTION                                         TYPE      POSITION     POSITION   
 --      --     ---                 -------------------                                         ----      --------     --------    
<S>     <C>     <C>       <C>                                                                  <C>          <C>          <C>        

OK      GTE               Reserved Telephone Number                                             NRC         Yes          No       
OK      GTE               Returned Check Charge                                                 NRC         No           No       
OK      GTE               Personalized Telephone Number - Business                              MRC         Yes         Yes       
OK      GTE               Personalized Telephone Number - Business                              NRC         Yes          No       
OK      GTE               Personalized Telephone Number - Residence                             MRC         Yes         Yes       
OK      GTE               Personalized Telephone Number - Residence                             NRC         Yes          No       
OK      GTE               Local Operator Interrupt                                             USAGE        Yes          No       
OK      GTE               Verification                                                         USAGE        Yes          No       
OK      GTE               Toll Blocking - All 1+ Calls                                          NRC         Yes          No       
OK      GTE               Toll Blocking - All 1+ Calls                                          MRC         Yes         Yes       
OK      GTE               Toll Blocking - All 1+, 0+ and 0- Calls                               NRC         Yes          No       
OK      GTE               Toll Blocking - All 1+, 0+ and 0- Calls                               MRC         Yes         Yes       
OK      GTE               Billed Number Screening - Third Number Billing                        NRC         Yes          No       
OK      GTE               Billed Number Screening - Third Number Billing                        MRC         Yes         Yes       
OK      GTE               Billed Number Screening - Collect Calling Billing                     NRC         Yes          No       
OK      GTE               Billed Number Screening - Collect Calling Billing                     MRC         Yes         Yes       
OK      GTE               Billed Number Screening - Collect and Third Number Billing            NRC         Yes          No       
OK      GTE               Billed Number Screening - Collect and Third Number Billing            MRC         Yes         Yes       
OK      GTE               Selective Class of Call Screening (per Line Charge)                   NRC         Yes          No       
OK      GTE               Selective Class of Call Screening (per Line Charge)                   MRC         Yes         Yes       
OK      GTE               Selective Class of Call Screening (per Trunk Charge)                  NRC         Yes          No       
OK      GTE               Selective Class of Call Screening (per Trunk Charge)                  MRC         Yes         Yes       
OK      GTE       12      Local Message Coin Service                                           USAGE        Yes          No       
</TABLE>

<TABLE>
<CAPTION>
                                                                                                 RETAIL      AVOIDED       RESALE
 ST      CO     SEC                 SERVICE DESCRIPTION                                           RATE        COST          RATE
 --      --     ---                 -------------------                                          ------      -------       ------- 
<S>     <C>     <C>       <C>                                                                    <C>           <C>         <C>     

OK      GTE               Reserved Telephone Number                                                $5.00         N/A         $5.00
OK      GTE               Returned Check Charge                                                   $10.00         N/A           N/A
OK      GTE               Personalized Telephone Number - Business                                 $3.50       $0.38         $3.12
OK      GTE               Personalized Telephone Number - Business                                $50.00         N/A        $50.00
OK      GTE               Personalized Telephone Number - Residence                                $1.50       $0.16         $1.34
OK      GTE               Personalized Telephone Number - Residence                               $25.00         N/A        $25.00
OK      GTE               Local Operator Interrupt                                                 $2.50         N/A         $2.50
OK      GTE               Verification                                                             $1.50         N/A         $1.50
OK      GTE               Toll Blocking - All 1+ Calls                                            $10.00         N/A        $10.00
OK      GTE               Toll Blocking - All 1+ Calls                                             $3.00       $0.33         $2.67
OK      GTE               Toll Blocking - All 1+, 0+ and 0- Calls                                 $10.00         N/A        $10.00
OK      GTE               Toll Blocking - All 1+, 0+ and 0- Calls                                  $3.00       $0.33         $2.67
OK      GTE               Billed Number Screening - Third Number Billing                          $10.00         N/A        $10.00
OK      GTE               Billed Number Screening - Third Number Billing                           $3.00       $0.33         $2.67
OK      GTE               Billed Number Screening - Collect Calling Billing                       $10.00         N/A        $10.00
OK      GTE               Billed Number Screening - Collect Calling Billing                        $3.00       $0.33         $2.67
OK      GTE               Billed Number Screening - Collect and Third Number Billing              $10.00         N/A        $10.00
OK      GTE               Billed Number Screening - Collect and Third Number Billing               $3.00       $0.33         $2.67
OK      GTE               Selective Class of Call Screening (per Line Charge)                     $10.00         N/A        $10.00
OK      GTE               Selective Class of Call Screening (per Line Charge)                      $3.00       $0.33         $2.67
OK      GTE               Selective Class of Call Screening (per Trunk Charge)                    $10.00         N/A        $10.00
OK      GTE               Selective Class of Call Screening (per Trunk Charge)                    $10.00       $1.09         $8.91
OK      GTE       12      Local Message Coin Service                                               $0.25         N/A         $0.25
</TABLE>



                                     Page 5
<PAGE>   102
                                    
                    GTE TELEPHONE OPERATIONS HEADQUARTERS
                 RESALE PRODUCTS & SERVICES - STATE OF OKLAHOMA
                          GTESW EXCHANGE NETWORK TARIFF
<TABLE>
<CAPTION>
                                                                                               BILLING     RESALE      DISCOUNT    
 ST      CO     SEC                 SERVICE DESCRIPTION                                         TYPE      POSITION     POSITION    
 --      --     ---                 -------------------                                         ----      --------     --------    
<S>     <C>     <C>    <C>                                                                     <C>          <C>          <C>       
                                                                                                                                   
OK      GTE       17      Local Directory Assistance                                               USAGE        Yes          No    
OK      GTE               Local Directory Assistance Call Completion                               USAGE        Yes          No    
OK      GTE       9       Business Dial DataLink Service                                            MRC         Yes         Yes    
OK      GTE               Business Dial DataLink Service                                            NRC         Yes          No    
OK      GTE               Residence Dial DataLink Service                                           MRC         Yes         Yes    
OK      GTE               Residence Dial DataLink Service                                           NRC         Yes          No    
OK      GTE               900 Call Restriction - Business                                           NRC         Yes          No    
OK      GTE               900 Call Restriction - Residence                                          NRC         Yes          No    
OK      GTE       23      Establishment of TSP Service                                              NRC         Yes          No    
OK      GTE               Restoration Priority                                                      MRC         Yes         Yes    
                  9    CUSTOM CALLING VERTICAL SERVICES:                                                                           
OK      GTE               Call Waiting - Business                                                   MRC         Yes         Yes    
OK      GTE               Call Waiting - Residence                                                  MRC         Yes         Yes    
OK      GTE               Call Forwarding - Business                                                MRC         Yes         Yes    
OK      GTE               Call Forwarding - Residence                                               MRC         Yes         Yes    
OK      GTE               Call Forwarding Multipath - Business                                      MRC         Yes         Yes    
OK      GTE               Call Forwarding Multipath - Residence                                     MRC         Yes         Yes    
OK      GTE               Call Waiting and Call Forwarding - Business                               MRC         Yes         Yes    
OK      GTE               Call Waiting and Call Forwarding - Residence                              MRC         Yes         Yes    
OK      GTE               Call Waiting and Speed Call 8 - Business                                  MRC         Yes         Yes    
OK      GTE               Call Waiting and Speed Call 8 - Residence                                 MRC         Yes         Yes    
OK      GTE               Call Forwarding and Speed Call 8 - Residence                              MRC         Yes         Yes    
OK      GTE               Call Waiting and Speed Call 30 - Residence                                MRC         Yes         Yes    
OK      GTE               Call Forwarding and Speed Call 30 - Business                              MRC         Yes         Yes    
OK      GTE               Call Waiting, Call Forwarding and Speed Call 8 - Residence                MRC         Yes         Yes    
OK      GTE               Call Waiting, Call Forwarding and Speed Call 30 - Business                MRC         Yes         Yes    
OK      GTE               Call Waiting, Call Forwarding and Speed Call 30 - Residence               MRC         Yes         Yes    
OK      GTE               Three Way Calling - One Feature - Business                                MRC         Yes         Yes    
</TABLE> 

<TABLE>
<CAPTION>
                                                                                                  RETAIL       AVOIDED      RESALE  
 ST      CO     SEC                 SERVICE DESCRIPTION                                            RATE          COST        RATE 
 --      --     ---                 -------------------                                           -------      --------      -----
<S>     <C>     <C>    <C>                                                                       <C>          <C>           <C>

OK      GTE       17      Local Directory Assistance                                               $0.25         N/A         $0.25
OK      GTE               Local Directory Assistance Call Completion                               $0.50         N/A         $0.50
OK      GTE       9       Business Dial DataLink Service                                           $5.00       $0.55         $4.45
OK      GTE               Business Dial DataLink Service                                          $25.00         N/A        $25.00
OK      GTE               Residence Dial DataLink Service                                          $5.00       $0.55         $4.45
OK      GTE               Residence Dial DataLink Service                                         $25.00         N/A        $25.00
OK      GTE               900 Call Restriction - Business                                          $3.50         N/A         $3.50
OK      GTE               900 Call Restriction - Residence                                         $3.50         N/A         $3.50
OK      GTE       23      Establishment of TSP Service                                            $14.50         N/A        $14.50
OK      GTE               Restoration Priority                                                     $4.90       $0.54         $4.36
                  9    CUSTOM CALLING VERTICAL SERVICES:
OK      GTE               Call Waiting - Business                                                  $3.50       $0.38         $3.12
OK      GTE               Call Waiting - Residence                                                 $2.45       $0.27         $2.18
OK      GTE               Call Forwarding - Business                                               $2.70       $0.30         $2.40
OK      GTE               Call Forwarding - Residence                                              $2.10       $0.23         $1.87
OK      GTE               Call Forwarding Multipath - Business                                     $2.70       $0.30         $2.40
OK      GTE               Call Forwarding Multipath - Residence                                    $2.10       $0.23         $1.87
OK      GTE               Call Waiting and Call Forwarding - Business                              $6.40       $0.70         $5.70
OK      GTE               Call Waiting and Call Forwarding - Residence                             $4.70       $0.51         $4.19
OK      GTE               Call Waiting and Speed Call 8 - Business                                 $6.40       $0.70         $5.70
OK      GTE               Call Waiting and Speed Call 8 - Residence                                $4.70       $0.51         $4.19
OK      GTE               Call Forwarding and Speed Call 8 - Residence                             $4.70       $0.51         $4.19
OK      GTE               Call Waiting and Speed Call 30 - Residence                               $5.85       $0.64         $5.21
OK      GTE               Call Forwarding and Speed Call 30 - Business                             $8.15       $0.89         $7.26
OK      GTE               Call Waiting, Call Forwarding and Speed Call 8 - Residence               $5.85       $0.64         $5.21
OK      GTE               Call Waiting, Call Forwarding and Speed Call 30 - Business               $9.70       $1.06         $8.64
OK      GTE               Call Waiting, Call Forwarding and Speed Call 30 - Residence              $6.95       $0.76         $6.19
OK      GTE               Three Way Calling - One Feature - Business                               $6.25       $0.68         $5.57
</TABLE>

                                     Page 6

<PAGE>   103

                   GTE TELEPHONE OPERATIONS HEADQUARTERS
                 RESALE PRODUCTS & SERVICES - STATE OF OKLAHOMA
                          GTESW EXCHANGE NETWORK TARIFF
<TABLE>
<CAPTION>
                                                                                               BILLING     RESALE      DISCOUNT    
 ST      CO     SEC                 SERVICE DESCRIPTION                                         TYPE      POSITION     POSITION    
 --      --     ---                 -------------------                                         ----      --------     --------    
<S>     <C>     <C>       <C>                                                                  <C>          <C>          <C>       
OK      GTE               Three Way Calling - One Feature - Residence                               MRC         Yes         Yes    
OK      GTE               Three Way Calling - More than One Feature -Business                       MRC         Yes         Yes    
OK      GTE               Three Way Calling - More than One Feature - Residence                     MRC         Yes         Yes    
OK      GTE               Cancel Call Waiting - Business                                            MRC         Yes         Yes    
OK      GTE               Cancel Call Waiting - Residence                                           MRC         Yes         Yes    
OK      GTE               Last Number Redial and Saved-Number Redial - Business                     MRC         Yes         Yes    
OK      GTE               Last Number Redial and Saved-Number Redial - Residence                    MRC         Yes         Yes    
OK      GTE               Call Forward/Busy/No Answer - Business (Variable)                         MRC         Yes         Yes    
OK      GTE               Call Forward/Busy/No Answer - Residence (Variable)                        MRC         Yes         Yes    
OK      GTE               Smart Ring - One Feature - Business                                       MRC         Yes         Yes    
OK      GTE               Smart Ring - One Feature - Residence                                      MRC         Yes         Yes    
OK      GTE               Fixed Call Forwarding/Busy - Business                                     MRC         Yes         Yes    
OK      GTE               Fixed Call Forwarding/Busy - Residence                                    MRC         Yes         Yes    
OK      GTE               Fixed Call Forwarding/No Answer - Business                                MRC         Yes         Yes    
OK      GTE               Fixed Call Forwarding/No Answer - Residence                               MRC         Yes         Yes    
OK      GTE               Fixed Call Forwarding/All Calls - Business                                MRC         Yes         Yes    
OK      GTE               Fixed Call Forwarding/All Calls - Residence                               MRC         Yes         Yes    
OK      GTE               SMART Package - Business                                                  MRC         Yes         Yes    
OK      GTE               SMART Package - Residence                                                 MRC         Yes         Yes    
OK      GTE               SMARTER Package - Business                                                MRC         Yes         Yes    
OK      GTE               SMARTER Package - Residence                                               MRC         Yes         Yes    
OK      GTE               Smart Call PAK With Smart Ring - Business                                 MRC         Yes         Yes    
OK      GTE               Smart Call PAK With Smart Ring - Residence                                MRC         Yes         Yes    
OK      GTE               Smarter Call PAK With Smart Ring - Business                               MRC         Yes         Yes    
OK      GTE               Smarter Call PAK With Smart Ring - Residence                              MRC         Yes         Yes    
OK      GTE               SMARTEST Package -Business                                                MRC         Yes         Yes    
OK      GTE               SMARTEST Package - Residence                                              MRC         Yes         Yes    
OK      GTE               Smartest Call PAK With Smart Ring - Business                              MRC         Yes         Yes    
OK      GTE               Smartest Call PAK With Smart Ring - Residence                             MRC         Yes         Yes    
OK      GTE               Remote Call Forwarding - Business                                         MRC         Yes         Yes    
OK      GTE               Remote Call Forwarding - Residence                                        MRC         Yes         Yes    
</TABLE>

<TABLE>
<CAPTION>
                                                                                                    RETAIL     AVOIDED       RESALE
 ST      CO     SEC                 SERVICE DESCRIPTION                                              RATE        COST         RATE 
 --      --     ---                 -------------------                                             ------      ------       ------
<S>     <C>     <C>       <C>                                                                       <C>         <C>            <C>
OK      GTE               Three Way Calling - One Feature - Residence                                $5.65       $0.62         $5.03
OK      GTE               Three Way Calling - More than One Feature -Business                        $5.00       $0.55         $4.45
OK      GTE               Three Way Calling - More than One Feature - Residence                      $4.40       $0.48         $3.92
OK      GTE               Cancel Call Waiting - Business                                             $2.00       $0.22         $1.78
OK      GTE               Cancel Call Waiting - Residence                                            $1.00       $0.11         $0.89
OK      GTE               Last Number Redial and Saved-Number Redial - Business                      $3.50       $0.38         $3.12
OK      GTE               Last Number Redial and Saved-Number Redial - Residence                     $3.00       $0.33         $2.67
OK      GTE               Call Forward/Busy/No Answer - Business (Variable)                          $3.50       $0.38         $3.12
OK      GTE               Call Forward/Busy/No Answer - Residence (Variable)                         $2.50       $0.27         $2.23
OK      GTE               Smart Ring - One Feature - Business                                        $6.00       $0.66         $5.34
OK      GTE               Smart Ring - One Feature - Residence                                       $6.00       $0.66         $5.34
OK      GTE               Fixed Call Forwarding/Busy - Business                                      $1.25       $0.14         $1.11
OK      GTE               Fixed Call Forwarding/Busy - Residence                                     $1.25       $0.14         $1.11
OK      GTE               Fixed Call Forwarding/No Answer - Business                                 $1.25       $0.14         $1.11
OK      GTE               Fixed Call Forwarding/No Answer - Residence                                $1.25       $0.14         $1.11
OK      GTE               Fixed Call Forwarding/All Calls - Business                                 $3.50       $0.38         $3.12
OK      GTE               Fixed Call Forwarding/All Calls - Residence                                $3.50       $0.38         $3.12
OK      GTE               SMART Package - Business                                                   $4.75       $0.52         $4.23
OK      GTE               SMART Package - Residence                                                  $3.75       $0.41         $3.34
OK      GTE               SMARTER Package - Business                                                 $5.75       $0.63         $5.12
OK      GTE               SMARTER Package - Residence                                                $4.75       $0.52         $4.23
OK      GTE               Smart Call PAK With Smart Ring - Business                                  $7.75       $0.85         $6.90
OK      GTE               Smart Call PAK With Smart Ring - Residence                                 $6.75       $0.74         $6.01
OK      GTE               Smarter Call PAK With Smart Ring - Business                                $8.75       $0.96         $7.79
OK      GTE               Smarter Call PAK With Smart Ring - Residence                               $7.75       $0.85         $6.90
OK      GTE               SMARTEST Package -Business                                                 $6.75       $0.74         $6.01
OK      GTE               SMARTEST Package - Residence                                               $5.75       $0.63         $5.12
OK      GTE               Smartest Call PAK With Smart Ring - Business                               $9.75       $1.07         $8.68
OK      GTE               Smartest Call PAK With Smart Ring - Residence                              $8.75       $0.96         $7.79
OK      GTE               Remote Call Forwarding - Business                                         $14.50       $1.58        $12.92
OK      GTE               Remote Call Forwarding - Residence                                        $14.50       $1.58        $12.92
</TABLE>


                                     Page 7
<PAGE>   104
                   GTE TELEPHONE OPERATIONS HEADQUARTERS
                 RESALE PRODUCTS & SERVICES - STATE OF OKLAHOMA
                          GTESW EXCHANGE NETWORK TARIFF
<TABLE>
<CAPTION>
                                                                                               BILLING     RESALE      DISCOUNT    
 ST      CO     SEC                 SERVICE DESCRIPTION                                         TYPE      POSITION     POSITION    
 --      --     ---                 -------------------                                         ----      --------     --------    
<S>     <C>     <C>   <C>                                                                       <C>          <C>          <C>       
                      TEL-TEEN SERVICE CUSTOM FEATURE PACKAGES:                                                                    
OK      GTE                  Touch Call, Three-Way Calling, Speed Call 8, Toll Control              MRC         Yes         Yes    
OK      GTE                  Touch Call, Call Waiting, Speed Call 8, Toll Control                   MRC         Yes         Yes    
OK      GTE                  Touch Call, Three-Way Calling, Toll Control                            MRC         Yes         Yes    
OK      GTE                  Touch Call, Call Waiting, Speed Call 8                                 MRC         Yes         Yes    
                       CLASS VERTICAL SERVICES:                                                                                    
OK      GTE               Automatic Busy Redial - Business                                          MRC         Yes         Yes    
OK      GTE               Automatic Busy Redial - Residence                                         MRC         Yes         Yes    
OK      GTE               Automatic Call Return - Business                                          MRC         Yes         Yes    
OK      GTE               Automatic Call Return - Residence                                         MRC         Yes         Yes    
OK      GTE               Call Back - Business                                                      MRC         Yes         Yes    
OK      GTE               Call Back - Residence                                                     MRC         Yes         Yes    
OK      GTE               Special Call Acceptance - Business                                        MRC         Yes         Yes    
OK      GTE               Special Call Acceptance - Residence                                       MRC         Yes         Yes    
OK      GTE               Special Call Forwarding - Business                                        MRC         Yes         Yes    
OK      GTE               Special Call Forwarding - Residence                                       MRC         Yes         Yes    
OK      GTE               Special Call Waiting - Business                                           MRC         Yes         Yes    
OK      GTE               Special Call Waiting - Residence                                          MRC         Yes         Yes    
OK      GTE               VIP Alert - Business                                                      MRC         Yes         Yes    
OK      GTE               VIP Alert - Residence                                                     MRC         Yes         Yes    
OK      GTE               Call Tracing Service - Business                                           MRC         Yes         Yes    
OK      GTE               Call Tracing Service - Residence                                          MRC         Yes         Yes    
OK      GTE               Cancel Calling Number ID - Business                                       MRC         Yes         Yes    
OK      GTE               Cancel Calling Number ID - Residence                                      MRC         Yes         Yes    
OK      GTE               Calling Number ID - Business                                              MRC         Yes         Yes    
OK      GTE               Calling Number ID - Residence                                             MRC         Yes         Yes    
OK      GTE               SmartCall PAK 4400- Residence                                             MRC         Yes         Yes    
OK      GTE               SmartCall PAK 4900 - Residence                                            MRC         Yes         Yes    
              6    SERVICE CHARGES:                                                                                                
</TABLE>

<TABLE>
<CAPTION>
                                                                                                  RETAIL     AVOIDED        RESALE  
 ST      CO     SEC                 SERVICE DESCRIPTION                                            RATE        COST          RATE 
 --      --     ---                 -------------------                                           ------      ------        ------
<S>     <C>     <C>   <C>                                                                         <C>         <C>           <C>
                      TEL-TEEN SERVICE CUSTOM FEATURE PACKAGES:
OK      GTE                  Touch Call, Three-Way Calling, Speed Call 8, Toll Control             $0.00       $0.00         $0.00
OK      GTE                  Touch Call, Call Waiting, Speed Call 8, Toll Control                  $0.00       $0.00         $0.00
OK      GTE                  Touch Call, Three-Way Calling, Toll Control                           $0.00       $0.00         $0.00
OK      GTE                  Touch Call, Call Waiting, Speed Call 8                                $0.00       $0.00         $0.00
                       CLASS VERTICAL SERVICES:
OK      GTE               Automatic Busy Redial - Business                                         $4.00       $0.44         $3.56
OK      GTE               Automatic Busy Redial - Residence                                        $3.00       $0.33         $2.67
OK      GTE               Automatic Call Return - Business                                         $4.00       $0.44         $3.56
OK      GTE               Automatic Call Return - Residence                                        $3.00       $0.33         $2.67
OK      GTE               Call Back - Business                                                     $4.00       $0.44         $3.56
OK      GTE               Call Back - Residence                                                    $3.00       $0.33         $2.67
OK      GTE               Special Call Acceptance - Business                                       $4.00       $0.44         $3.56
OK      GTE               Special Call Acceptance - Residence                                      $3.00       $0.33         $2.67
OK      GTE               Special Call Forwarding - Business                                       $6.00       $0.66         $5.34
OK      GTE               Special Call Forwarding - Residence                                      $5.00       $0.55         $4.45
OK      GTE               Special Call Waiting - Business                                          $6.00       $0.66         $5.34
OK      GTE               Special Call Waiting - Residence                                         $5.00       $0.55         $4.45
OK      GTE               VIP Alert - Business                                                     $4.00       $0.44         $3.56
OK      GTE               VIP Alert - Residence                                                    $3.00       $0.33         $2.67
OK      GTE               Call Tracing Service - Business                                          $6.00       $0.66         $5.34
OK      GTE               Call Tracing Service - Residence                                         $5.00       $0.55         $4.45
OK      GTE               Cancel Calling Number ID - Business                                      $0.00       $0.00         $0.00
OK      GTE               Cancel Calling Number ID - Residence                                     $0.00       $0.00         $0.00
OK      GTE               Calling Number ID - Business                                            $10.00       $1.09         $8.91
OK      GTE               Calling Number ID - Residence                                            $7.00       $0.77         $6.23
OK      GTE               SmartCall PAK 4400- Residence                                            $8.75       $0.96         $7.79
OK      GTE               SmartCall PAK 4900 - Residence                                          $13.25       $1.45        $11.80
              6    SERVICE CHARGES:
</TABLE>


  

                                     PAGE 8


<PAGE>   105
                   GTE TELEPHONE OPERATIONS HEADQUARTERS
                 RESALE PRODUCTS & SERVICES - STATE OF OKLAHOMA
                          GTESW EXCHANGE NETWORK TARIFF
<TABLE>
<CAPTION>
                                                                                               BILLING     RESALE      DISCOUNT    
 ST      CO     SEC                 SERVICE DESCRIPTION                                         TYPE      POSITION     POSITION    
 --      --     ---                 -------------------                                         ----      --------     --------    
<S>     <C>     <C>       <C>                                                                  <C>          <C>          <C>       
                          BUSINESS:                                                                                                
OK      GTE                  Primary Service Order Charge                                           NRC         No           No    
OK      GTE                  Secondary Service Order Charge                                         NRC         No           No    
OK      GTE                  Line Connection Charge                                                 NRC         Yes          No    
OK      GTE                  Restoral From Vacation Service (prior to min vacation period)          NRC         No           No    
OK      GTE                  Restore Service After Temporary Denial Nonpay                          NRC         No           No    
OK      GTE                  Expedited Due Date Charge (non system)                                 NRC         No           No    
OK      GTE                  Operator Referral                                                      NRC         No           No    
                          RESIDENCE:                                                                                               
OK      GTE                  Primary Service Order Charge                                           NRC         No           No    
OK      GTE                  Secondary Service Order Charge                                         NRC         No           No    
OK      GTE                  Line Connection Charge                                                 NRC         Yes          No    
OK      GTE                  Restoral From Vacation Service (prior to min vacation period)          NRC         No           No    
OK      GTE                  Restore Service After Temporary Denial Nonpay                          NRC         No           No    
OK      GTE                  Expedited Due Date Charge                                              NRC         No           No    
OK      GTE                  Operator Referral                                                      NRC         No           No    
                       LDMT GTE LONG DISTANCE TELECOMMUNICATIONS SERVICES:                                                         
                  1       INTRALATA TWO POINT SERVICE                                                                              
OK      GTE                  Day Rate - 1 to 8 Miles - Initial Minute Charge                       USAGE        Yes         Yes    
OK      GTE                  Day Rate - 9 to 12 Miles - Initial Minute Charge                      USAGE        Yes         Yes    
OK      GTE                  Day Rate - 13 to 17 Miles - Initial Minute Charge                     USAGE        Yes         Yes    
OK      GTE                  Day Rate - 18 to 22 Miles - Initial Minute Charge                     USAGE        Yes         Yes    
OK      GTE                  Day Rate - 23 to 27 Miles - Initial Minute Charge                     USAGE        Yes         Yes    
OK      GTE                  Day Rate - 28 to 32 Miles - Initial Minute Charge                     USAGE        Yes         Yes    
OK      GTE                  Day Rate - 33 to 42 Miles - Initial Minute Charge                     USAGE        Yes         Yes    
OK      GTE                  Day Rate - 43 to 54 Miles - Initial Minute Charge                     USAGE        Yes         Yes    
OK      GTE                  Day Rate - 55 to 66 Miles - Initial Minute Charge                     USAGE        Yes         Yes    
OK      GTE                  Day Rate - 67 to 82 Miles - Initial Minute Charge                     USAGE        Yes         Yes    
OK      GTE                  Day Rate - 83 to 100 Miles - Initial Minute Charge                    USAGE        Yes         Yes    
OK      GTE                  Day Rate - 101 to 122 Miles - Initial Minute Charge                   USAGE        Yes         Yes    
OK      GTE                  Day Rate - 123 to 168 Miles - Initial Minute Charge                   USAGE        Yes         Yes    
</TABLE>


<TABLE>
<CAPTION>
                                                                                                 RETAIL        AVOIDED      RESALE
 ST      CO     SEC                 SERVICE DESCRIPTION                                          RATE           COST         RATE
 --      --     ---                 -------------------                                          ----           ----         ----
<S>     <C>     <C>       <C>                                                                  <C>          <C>          <C>       
                          BUSINESS:                                                                                                
OK      GTE                  Primary Service Order Charge                                        $32.50          N/A           N/A  
OK      GTE                  Secondary Service Order Charge                                      $13.70          N/A           N/A 
OK      GTE                  Line Connection Charge                                              $20.70          N/A         $20.70
OK      GTE                  Restoral From Vacation Service (prior to min vacation period)       $23.00          N/A           N/A
OK      GTE                  Restore Service After Temporary Denial Nonpay                       $20.70          N/A           N/A
OK      GTE                  Expedited Due Date Charge (non system)                              $10.00          N/A           N/A
OK      GTE                  Operator Referral                                                   $ 5.00          N/A           N/A
                          RESIDENCE:                                                                       
OK      GTE                  Primary Service Order Charge                                        $23.00          N/A           N/A
OK      GTE                  Secondary Service Order Charge                                      $12.00          N/A           N/A
OK      GTE                  Line Connection Charge                                              $20.70          N/A         $20.70
OK      GTE                  Restoral From Vacation Service (prior to min vacation period)       $23.00          N/A           N/A
OK      GTE                  Restore Service After Temporary Denial Nonpay                       $20.70          N/A           N/A
OK      GTE                  Expedited Due Date Charge                                           $10.00          N/A           N/A
OK      GTE                  Operator Referral                                                   $ 5.00          N/A           N/A
                       LDMT GTE LONG DISTANCE TELECOMMUNICATIONS SERVICES:                                 
                  1       INTRALATA TWO POINT SERVICE                                                      
OK      GTE                  Day Rate - 1 to 8 Miles - Initial Minute Charge                     $ 0.12         $0.01        $0.11 
OK      GTE                  Day Rate - 9 to 12 Miles - Initial Minute Charge                    $ 0.15         $0.02        $0.13  
OK      GTE                  Day Rate - 13 to 17 Miles - Initial Minute Charge                   $ 0.16         $0.02        $0.16  
OK      GTE                  Day Rate - 18 to 22 Miles - Initial Minute Charge                   $ 0.19         $0.02        $0.17
OK      GTE                  Day Rate - 23 to 27 Miles - Initial Minute Charge                   $ 0.23         $0.03        $0.20 
OK      GTE                  Day Rate - 28 to 32 Miles - Initial Minute Charge                   $ 0.27         $0.03        $0.24 
OK      GTE                  Day Rate - 33 to 42 Miles - Initial Minute Charge                   $ 0.30         $0.03        $0.27  
OK      GTE                  Day Rate - 43 to 54 Miles - Initial Minute Charge                   $ 0.34         $0.04        $0.30 
OK      GTE                  Day Rate - 55 to 66 Miles - Initial Minute Charge                   $ 0.37         $0.04        $0.33
OK      GTE                  Day Rate - 67 to 82 Miles - Initial Minute Charge                   $ 0.41         $0.04        $0.37
OK      GTE                  Day Rate - 83 to 100 Miles - Initial Minute Charge                  $ 0.45         $0.05        $0.40
OK      GTE                  Day Rate - 101 to 122 Miles - Initial Minute Charge                 $ 0.48         $0.05        $0.43
</TABLE>


                                     Page 9
<PAGE>   106
                  GTE TELEPHONE OPERATIONS HEADQUARTERS
                 RESALE PRODUCTS & SERVICES - STATE OF OKLAHOMA
                          GTESW EXCHANGE NETWORK TARIFF
<TABLE>
<CAPTION>
                                                                                            BILLING     RESALE      DISCOUNT       
 ST      CO     SEC                 SERVICE DESCRIPTION                                      TYPE      POSITION     POSITION        
 --      --     ---                 -------------------                                      ----      --------     --------        
<S>     <C>     <C>          <C>                                                            <C>          <C>          <C>         
OK      GTE                  Day Rate - 123 to 168 Miles - Initial Minute Charge             USAGE        Yes         Yes           
OK      GTE                  Day Rate - 169 to 252 Miles - Initial Minute Charge             USAGE        Yes         Yes           
OK      GTE                  Day Rate -  Over 252 Miles - Initial Minute Charge              USAGE        Yes         Yes           
OK      GTE                  Evening Rate - 1 to 8 Miles - Initial Minute Charge             USAGE        Yes         Yes           
OK      GTE                  Evening Rate - 9 to 12 Miles - Initial Minute Charge            USAGE        Yes         Yes           
OK      GTE                  Evening Rate - 13 to 17 Miles - Initial Minute Charge           USAGE        Yes         Yes           
OK      GTE                  Evening Rate - 18 to 22 Miles - Initial Minute Charge           USAGE        Yes         Yes           
OK      GTE                  Evening Rate - 23 to 27 Miles - Initial Minute Charge           USAGE        Yes         Yes           
OK      GTE                  Evening Rate - 28 to 32 Miles - Initial Minute Charge           USAGE        Yes         Yes           
OK      GTE                  Evening Rate - 33 to 42 Miles - Initial Minute Charge           USAGE        Yes         Yes           
OK      GTE                  Evening Rate - 43 to 54 Miles - Initial Minute Charge           USAGE        Yes         Yes           
OK      GTE                  Evening Rate - 55 to 66 Miles - Initial Minute Charge           USAGE        Yes         Yes           
OK      GTE                  Evening Rate - 67 to 82 Miles - Initial Minute Charge           USAGE        Yes         Yes           
OK      GTE                  Evening Rate - 83 to 100 Miles - Initial Minute Charge          USAGE        Yes         Yes           
OK      GTE                  Evening Rate - 101 to 122 Miles - Initial Minute Charge         USAGE        Yes         Yes           
OK      GTE                  Evening Rate - 123 to 168 Miles - Initial Minute Charge         USAGE        Yes         Yes           
OK      GTE                  Evening Rate - 169 to 252 Miles - Initial Minute Charge         USAGE        Yes         Yes           
OK      GTE                  Evening Rate -  Over 252 Miles - Initial Minute Charge          USAGE        Yes         Yes           
OK      GTE                  Night/Weekend Rate - 1 to 8 Miles - Initial Minute Charge       USAGE        Yes         Yes           
OK      GTE                  Night/Weekend Rate - 9 to 12 Miles - Initial Minute Charge      USAGE        Yes         Yes           
OK      GTE                  Night/Weekend Rate - 13 to 17 Miles - Initial Minute Charge     USAGE        Yes         Yes           
OK      GTE                  Night/Weekend Rate - 18 to 22 Miles - Initial Minute Charge     USAGE        Yes         Yes           
OK      GTE                  Night/Weekend Rate - 23 to 27 Miles - Initial Minute Charge     USAGE        Yes         Yes           
OK      GTE                  Night/Weekend Rate - 28 to 32 Miles - Initial Minute Charge     USAGE        Yes         Yes           
OK      GTE                  Night/Weekend Rate - 33 to 42 Miles - Initial Minute Charge     USAGE        Yes         Yes           
OK      GTE                  Night/Weekend Rate - 43 to 54 Miles - Initial Minute Charge     USAGE        Yes         Yes           
OK      GTE                  Night/Weekend Rate - 55 to 66 Miles - Initial Minute Charge     USAGE        Yes         Yes           
OK      GTE                  Night/Weekend Rate - 67 to 82 Miles - Initial Minute Charge     USAGE        Yes         Yes           
OK      GTE                  Night/Weekend Rate - 83 to 100 Miles - Initial Minute Charge    USAGE        Yes         Yes           
OK      GTE                  Night/Weekend Rate - 101 to 122 Miles - Initial Minute Charge   USAGE        Yes         Yes           
</TABLE>

<TABLE>
<CAPTION>
                                                                                                   RETAIL      AVOIDED      RESALE
 ST      CO     SEC                 SERVICE DESCRIPTION                                             RATE         COST        RATE
 --      --     ---                 -------------------                                            ------       ------       ------ 
<S>     <C>     <C>       <C>                                                                     <C>          <C>           <C>
OK      GTE                  Day Rate - 123 to 168 Miles - Initial Minute Charge                   $0.51       $0.06         $0.45
OK      GTE                  Day Rate - 169 to 252 Miles - Initial Minute Charge                   $0.53       $0.06         $0.47
OK      GTE                  Day Rate -  Over 252 Miles - Initial Minute Charge                    $0.55       $0.06         $0.49
OK      GTE                  Evening Rate - 1 to 8 Miles - Initial Minute Charge                   $0.09       $0.01         $0.08
OK      GTE                  Evening Rate - 9 to 12 Miles - Initial Minute Charge                  $0.11       $0.01         $0.10
OK      GTE                  Evening Rate - 13 to 17 Miles - Initial Minute Charge                 $0.14       $0.02         $0.12
OK      GTE                  Evening Rate - 18 to 22 Miles - Initial Minute Charge                 $0.14       $0.02         $0.12
OK      GTE                  Evening Rate - 23 to 27 Miles - Initial Minute Charge                 $0.17       $0.02         $0.15
OK      GTE                  Evening Rate - 28 to 32 Miles - Initial Minute Charge                 $0.20       $0.02         $0.18
OK      GTE                  Evening Rate - 33 to 42 Miles - Initial Minute Charge                 $0.16       $0.02         $0.14
OK      GTE                  Evening Rate - 43 to 54 Miles - Initial Minute Charge                 $0.26       $0.03         $0.23
OK      GTE                  Evening Rate - 55 to 66 Miles - Initial Minute Charge                 $0.28       $0.03         $0.25
OK      GTE                  Evening Rate - 67 to 82 Miles - Initial Minute Charge                 $0.31       $0.03         $0.28
OK      GTE                  Evening Rate - 83 to 100 Miles - Initial Minute Charge                $0.34       $0.04         $0.30
OK      GTE                  Evening Rate - 101 to 122 Miles - Initial Minute Charge               $0.36       $0.04         $0.32
OK      GTE                  Evening Rate - 123 to 168 Miles - Initial Minute Charge               $0.38       $0.04         $0.34
OK      GTE                  Evening Rate - 169 to 252 Miles - Initial Minute Charge               $0.40       $0.04         $0.36
OK      GTE                  Evening Rate -  Over 252 Miles - Initial Minute Charge                $0.41       $0.04         $0.37
OK      GTE                  Night/Weekend Rate - 1 to 8 Miles - Initial Minute Charge             $0.07       $0.01         $0.06
OK      GTE                  Night/Weekend Rate - 9 to 12 Miles - Initial Minute Charge            $0.09       $0.01         $0.08
OK      GTE                  Night/Weekend Rate - 13 to 17 Miles - Initial Minute Charge           $0.11       $0.01         $0.10
OK      GTE                  Night/Weekend Rate - 18 to 22 Miles - Initial Minute Charge           $0.11       $0.01         $0.10
OK      GTE                  Night/Weekend Rate - 23 to 27 Miles - Initial Minute Charge           $0.14       $0.02         $0.12
OK      GTE                  Night/Weekend Rate - 28 to 32 Miles - Initial Minute Charge           $0.16       $0.02         $0.14
OK      GTE                  Night/Weekend Rate - 33 to 42 Miles - Initial Minute Charge           $0.18       $0.02         $0.16
OK      GTE                  Night/Weekend Rate - 43 to 54 Miles - Initial Minute Charge           $0.20       $0.02         $0.18
OK      GTE                  Night/Weekend Rate - 55 to 66 Miles - Initial Minute Charge           $0.22       $0.02         $0.20
OK      GTE                  Night/Weekend Rate - 67 to 82 Miles - Initial Minute Charge           $0.25       $0.03         $0.22
OK      GTE                  Night/Weekend Rate - 83 to 100 Miles - Initial Minute Charge          $0.27       $0.03         $0.24
OK      GTE                  Night/Weekend Rate - 101 to 122 Miles - Initial Minute Charge         $0.29       $0.03         $0.26
</TABLE>
             
              
                                     PAGE 10
                                       
<PAGE>   107
                      GTE TELEPHONE OPERATIONS HEADQUARTERS
                 RESALE PRODUCTS & SERVICES - STATE OF OKLAHOMA
                          GTESW EXCHANGE NETWORK TARIFF

<TABLE>
<CAPTION>
                                                                                   BILLING  RESALE  DISCOUNT  RETAIL AVOIDED RESALE 
 ST      CO    SEC                    SERVICE DESCRIPTION                            TYPE  POSITION POSITION   RATE   COST    RATE  
 --      --    ---                    -------------------                            ----   ------- --------  ------ ------- -----  
<S>     <C>   <C>  <C>                                                               <C>     <C>    <C>      <C>     <C>     <C>   
OK       GTE        Night/Weekend Rate - 123 to 168 Miles - Initial Minute Charge     USAGE   Yes   Yes      $0.31   $0.03   $0.28 
OK       GTE        Night/Weekend Rate - 169 to 252 Miles - Initial Minute Charge     USAGE   Yes   Yes      $0.32   $0.03   $0.29 
OK       GTE        Night/Weekend Rate - Over 252 Miles - Initial Minute Charge       USAGE   Yes   Yes      $0.33   $0.04   $0.29 
OK       GTE        Day Rate - 1 to 8 Miles - Each Additional Minute Charge           USAGE   Yes   Yes      $0.07   $0.01   $0.06 
OK       GTE        Day Rate - 9 to 12 Miles - Each Additional Minute Charge          USAGE   Yes   Yes      $0.09   $0.01   $0.08 
OK       GTE        Day Rate - 13 to 17 Miles - Each Additional Minute Charge         USAGE   Yes   Yes      $0.11   $0.01   $0.10 
OK       GTE        Day Rate - 18 to 22 Miles - Each Additional Minute Charge         USAGE   Yes   Yes      $0.14   $0.02   $0.12 
OK       GTE        Day Rate - 23 to 27 Miles - Each Additional Minute Charge         USAGE   Yes   Yes      $0.18   $0.02   $0.16 
OK       GTE        Day Rate - 28 to 32 Miles - Each Additional Minute Charge         USAGE   Yes   Yes      $0.20   $0.02   $0.18 
OK       GTE        Day Rate - 33 to 42 Miles - Each Additional Minute Charge         USAGE   Yes   Yes      $0.24   $0.03   $0.21 
OK       GTE        Day Rate - 43 to 54 Miles - Each Additional Minute Charge         USAGE   Yes   Yes      $0.27   $0.03   $0.24 
OK       GTE        Day Rate - 55 to 66 Miles - Each Additional Minute Charge         USAGE   Yes   Yes      $0.31   $0.03   $0.28 
OK       GTE        Day Rate - 67 to 82 Miles - Each Additional Minute Charge         USAGE   Yes   Yes      $0.35   $0.04   $0.31 
OK       GTE        Day Rate - 83 to 100 Miles - Each Additional Minute Charge        USAGE   Yes   Yes      $0.39   $0.04   $0.35 
OK       GTE        Day Rate - 101 to 122 Miles - Each Additional Minute Charge       USAGE   Yes   Yes      $0.41   $0.04   $0.37 
OK       GTE        Day Rate - 123 to 168 Miles - Each Additional Minute Charge       USAGE   Yes   Yes      $0.44   $0.05   $0.39 
OK       GTE        Day Rate - 169 to 252 Miles - Each Additional Minute Charge       USAGE   Yes   Yes      $0.45   $0.05   $0.40 
OK       GTE        Day Rate - Over 252 Miles - Each Additional Minute Charge         USAGE   Yes   Yes      $0.47   $0.05   $0.42 
OK       GTE        Evening Rate - 1 to 8 Miles - Each Additional Minute Charge       USAGE   Yes   Yes      $0.05   $0.01   $0.04 
OK       GTE        Evening Rate - 9 to 12 Miles - Each Additional Minute Charge      USAGE   Yes   Yes      $0.07   $0.01   $0.06 
OK       GTE        Evening Rate - 13 to 17 Miles - Each Additional Minute Charge     USAGE   Yes   Yes      $0.08   $0.01   $0.07 
OK       GTE        Evening Rate - 18 to 22 Miles - Each Additional Minute Charge     USAGE   Yes   Yes      $0.11   $0.01   $0.10 
OK       GTE        Evening Rate - 23 to 27 Miles - Each Additional Minute Charge     USAGE   Yes   Yes      $0.14   $0.02   $0.12 
OK       GTE        Evening Rate - 28 to 32 Miles - Each Additional Minute Charge     USAGE   Yes   Yes      $0.15   $0.02   $0.13 
OK       GTE        Evening Rate - 33 to 42 Miles - Each Additional Minute Charge     USAGE   Yes   Yes      $0.18   $0.02   $0.16 
OK       GTE        Evening Rate - 43 to 54 Miles - Each Additional Minute Charge     USAGE   Yes   Yes      $0.20   $0.02   $0.18 
OK       GTE        Evening Rate - 55 to 66 Miles - Each Additional Minute Charge     USAGE   Yes   Yes      $0.23   $0.03   $0.20 
OK       GTE        Evening Rate - 67 to 82 Miles - Each Additional Minute Charge     USAGE   Yes   Yes      $0.26   $0.03   $0.23 
OK       GTE        Evening Rate - 83 to 100 Miles - Each Additional Minute Charge    USAGE   Yes   Yes      $0.29   $0.03   $0.26 
OK       GTE        Evening Rate - 101 to 122 Miles - Each Additional Minute Charge   USAGE   Yes   Yes      $0.31   $0.03   $0.28 
</TABLE>   

                                     PAGE 11
<PAGE>   108
                     GTE TELEPHONE OPERATIONS HEADQUARTERS
                 RESALE PRODUCTS & SERVICES - STATE OF OKLAHOMA
                         GTESW EXCHANGE NETWORK TARIFF

<TABLE>
<CAPTION>
                                                                                   BILLING    RESALE   DISCOUNT   RETAIL    
 ST      CO  SEC              SERVICE DESCRIPTION                                    TYPE    POSITION  POSITION    RATE     
 --      --  ---              -------------------                                    ----    --------  --------   ------    
<S>     <C>  <C> <C>                                                                 <C>      <C>        <C>      <C>        
OK      GTE      Evening Rate - 123 to 168 Miles - Each Additional Minute Charge     USAGE     Yes       Yes      $0.33     
OK      GTE      Evening Rate - 169 to 252 Miles - Each Additional Minute Charge     USAGE     Yes       Yes      $0.34     
OK      GTE      Evening Rate -  Over 252 Miles - Each Additional Minute Charge      USAGE     Yes       Yes      $0.35     

OK      GTE      Night/Weekend Rate - 1 to 8 Miles - Each Additional Minute Charge   USAGE     Yes       Yes      $0.04     
OK      GTE      Night/Weekend Rate - 9 to 12 Miles - Each Additional Minute Charge  USAGE     Yes       Yes      $0.05     
OK      GTE      Night/Weekend Rate - 13 to 17 Miles - Each Additional Minute Charg  USAGE     Yes       Yes      $0.07     
OK      GTE      Night/Weekend Rate - 18 to 22 Miles - Each Additional Minute Charg  USAGE     Yes       Yes      $0.08     
OK      GTE      Night/Weekend Rate - 23 to 27 Miles - Each Additional Minute Charg  USAGE     Yes       Yes      $0.11     
OK      GTE      Night/Weekend Rate - 28 to 32 Miles - Each Additional Minute Charg  USAGE     Yes       Yes      $0.12     
OK      GTE      Night/Weekend Rate - 33 to 42 Miles - Each Additional Minute Charg  USAGE     Yes       Yes      $0.14     
OK      GTE      Night/Weekend Rate - 43 to 54 Miles - Each Additional Minute Charg  USAGE     Yes       Yes      $0.16     
OK      GTE      Night/Weekend Rate - 55 to 66 Miles - Each Additional Minute Charg  USAGE     Yes       Yes      $0.19     
OK      GTE      Night/Weekend Rate - 67 to 82 Miles - Each Additional Minute Charg  USAGE     Yes       Yes      $0.21     
OK      GTE      Night/Weekend Rate - 83 to 100 Miles - Each Additional Minute Char  USAGE     Yes       Yes      $0.23     
OK      GTE      Night/Weekend Rate - 101 to 122 Miles - Each Additional Minute Ch   USAGE     Yes       Yes      $0.25     
OK      GTE      Night/Weekend Rate - 123 to 168 Miles - Each Additional Minute Ch   USAGE     Yes       Yes      $0.26     
OK      GTE      Night/Weekend Rate - 169 to 252 Miles - Each Additional Minute Ch   USAGE     Yes       Yes      $0.27     
OK      GTE      Night/Weekend Rate -  Over 252 Miles - Each Additional Minute Char  USAGE     Yes       Yes      $0.28     

               INTRALATA TWO POINT SERVICE:                                                                                 
OK      GTE      Service Charge - Dial Calling Card - Station to Station             USAGE     Yes        No      $0.35     
OK      GTE      Service Charge - Operator - Station to Station                      USAGE     Yes        No      $1.20     
OK      GTE      Service Charge - Person to Person                                   USAGE     Yes        No      $2.70     
OK      GTE                                                                                                                 
             2 INTRALATA OPTIONAL TOLL CALLING PLANS:                                                                       
                 Extended Community Saver:                                                                                  
                    Residence:                                                                                              
                       Block-of-Time:                                                                                       
OK      GTE               Monthly Rate for First Hour                                 MRC      Yes       Yes      $3.60    
OK      GTE               Additional Per Minute                                      USAGE     Yes       Yes      $0.05    
OK      GTE               Service Charge                                              NRC      Yes        No      $5.00    


<CAPTION>
                                                                                    AVOIDED       RESALE  
 ST      CO  SEC                 SERVICE DESCRIPTION                                 COST          RATE 
 --      --  ---                 -------------------                                ------        ------
<S>     <C>  <C> <C>                                                                <C>             <C>         
                                                                                  
OK      GTE      Evening Rate - 123 to 168 Miles - Each Additional Minute Charge    $0.04           $0.29 
OK      GTE      Evening Rate - 169 to 252 Miles - Each Additional Minute Charge    $0.04           $0.30 
OK      GTE      Evening Rate -  Over 252 Miles - Each Additional Minute Charge     $0.04           $0.31 

OK      GTE      Night/Weekend Rate - 1 to 8 Miles - Each Additional Minute Charge  $0.00           $0.04 
OK      GTE      Night/Weekend Rate - 9 to 12 Miles - Each Additional Minute Charg  $0.01           $0.04 
OK      GTE      Night/Weekend Rate - 13 to 17 Miles - Each Additional Minute Char  $0.01           $0.06 
OK      GTE      Night/Weekend Rate - 18 to 22 Miles - Each Additional Minute Char  $0.01           $0.07 
OK      GTE      Night/Weekend Rate - 23 to 27 Miles - Each Additional Minute Char  $0.01           $0.10 
OK      GTE      Night/Weekend Rate - 28 to 32 Miles - Each Additional Minute Char  $0.01           $0.11 
OK      GTE      Night/Weekend Rate - 33 to 42 Miles - Each Additional Minute Char  $0.02           $0.12 
OK      GTE      Night/Weekend Rate - 43 to 54 Miles - Each Additional Minute Char  $0.02           $0.14 
OK      GTE      Night/Weekend Rate - 55 to 66 Miles - Each Additional Minute Char  $0.02           $0.17 
OK      GTE      Night/Weekend Rate - 67 to 82 Miles - Each Additional Minute Char  $0.02           $0.19 
OK      GTE      Night/Weekend Rate - 83 to 100 Miles - Each Additional Minute Cha  $0.03           $0.20 
OK      GTE      Night/Weekend Rate - 101 to 122 Miles - Each Additional Minute Ch  $0.03           $0.22 
OK      GTE      Night/Weekend Rate - 123 to 168 Miles - Each Additional Minute Ch  $0.03           $0.23 
OK      GTE      Night/Weekend Rate - 169 to 252 Miles - Each Additional Minute Ch  $0.03           $0.24 
OK      GTE      Night/Weekend Rate -  Over 252 Miles - Each Additional Minute Cha  $0.03           $0.25 

               INTRALATA TWO POINT SERVICE:                                                               
OK      GTE      Service Charge - Dial Calling Card - Station to Station              N/A           $0.35 
OK      GTE      Service Charge - Operator - Station to Station                       N/A           $1.20 
OK      GTE      Service Charge - Person to Person                                    N/A           $2.70 
OK      GTE                                                                                               
             2 INTRALATA OPTIONAL TOLL CALLING PLANS:                                                     
                 Extended Community Saver:                                                                
                    Residence:                                                                            
                       Block-of-Time:                                                                     
OK      GTE               Monthly Rate for First Hour                               $0.39           $3.21 
OK      GTE               Additional Per Minute                                     $0.01           $0.04 
OK      GTE               Service Charge                                              N/A           $5.00
                                                                                                                         
</TABLE>


                                    Page 12
<PAGE>   109
                     GTE TELEPHONE OPERATIONS HEADQUARTERS
                 RESALE PRODUCTS & SERVICES - STATE OF OKLAHOMA
                         GTESW EXCHANGE NETWORK TARIFF



<TABLE>
<CAPTION>
                                                        BILLING      RESALE     DISCOUNT         RETAIL     AVOIDED        RESALE  
 ST      CO  SEC           SERVICE DESCRIPTION            TYPE      POSITION    POSITION          RATE        COST          RATE 
 --      --  ---           -------------------            ----      --------    --------         ------      ------        ------
<S>     <C>      <C>                                    <C>         <C>         <C>             <C>        <C>           <C>      
                   Business:
                       Block-of-Time:                            
OK      GTE              Monthly Rate for First Hour       MRC         Yes         Yes            $4.20       $0.46         $3.74
OK      GTE              Additional Per Minute            USAGE        Yes         Yes            $0.06       $0.01         $0.05
OK      GTE              Service Charge                    NRC         Yes          No            $7.50         N/A         $7.50
                   Residence:
OK      GTE           Unlimited Usage                      MRC         Yes         Yes           $20.00       $2.19        $17.81
OK      GTE           Service Charge                       NRC         Yes          No            $5.00         N/A         $5.00
OK      GTE        Business:
OK      GTE           Unlimited Usage                      MRC         Yes         Yes           $30.00       $3.28        $26.72
OK      GTE           Service Charge                       NRC         Yes          No            $7.50         N/A         $7.50
                Circle Saver:
                   Residence Block-of-Time:
                      17 Mile Radius:
OK      GTE              Monthly Rate for First Hour       MRC         Yes         Yes            $4.80       $0.52         $4.28
OK      GTE              Additional Per Minute            USAGE        Yes         Yes            $0.07       $0.01         $0.06
OK      GTE              Service Charge                    NRC         Yes          No            $5.00         N/A         $5.00
                      32 Mile Radius:
OK      GTE              Monthly Rate for First Hour       MRC         Yes         Yes            $6.25       $0.68         $5.57
OK      GTE              Additional Per Minute            USAGE        Yes         Yes            $0.09       $0.01         $0.08
OK      GTE              Service Charge                    NRC         Yes          No            $5.00         N/A         $5.00
                   Business Block-of-Time:
                      17 Mile Radius:
OK      GTE              Monthly Rate for First Hour       MRC         Yes         Yes            $6.25       $0.68         $5.57
OK      GTE              Additional Per Minute            USAGE        Yes         Yes            $0.09       $0.01         $0.08
OK      GTE              Service Charge                    NRC         Yes          No            $7.50         N/A         $7.50
                      32 Mile Radius:
OK      GTE              Monthly Rate for First Hour       MRC         Yes         Yes            $8.25       $0.90         $7.35
OK      GTE              Additional Per Minute            USAGE        Yes         Yes            $0.12       $0.01         $0.11
OK      GTE              Service Charge                    NRC         Yes          No            $7.50         N/A         $7.50
</TABLE>


                                    PAGE 13
<PAGE>   110
                     GTE TELEPHONE OPERATIONS HEADQUARTERS
                 RESALE PRODUCTS & SERVICES - STATE OF OKLAHOMA
                          GTESW EXCHANGE NETWORK TARIFF



<TABLE>
<CAPTION>
                                                                                        BILLING     RESALE     DISCOUNT   
 ST      CO  SEC                 SERVICE DESCRIPTION                                     TYPE      POSITION    POSITION   
 --      --  ---                 -------------------                                     ----      --------    --------   
<S>     <C>  <C>   <C>                                                                   <C>          <C>         <C>       
                   1+Saver:                                                                                                
                   Residence:                                                                                             
                       Block-of-Time:                                                                                     
OK      GTE              Monthly Rate for First Hour                                      MRC         Yes         Yes     
OK      GTE              Additional Per Minute                                           USAGE        Yes         Yes     
OK      GTE              Service Charge                                                   NRC         Yes          No     
                   Business:                                                                                              
                       Block-of-Time:                                                                                     
OK      GTE              Monthly Rate for First Hour                                      MRC         Yes         Yes     
OK      GTE              Additional Per Minute                                           USAGE        Yes         Yes     
OK      GTE              Service Charge                                                   NRC         Yes          No     
                   Residence:                                                                                             
                       Discount Plan:                                                                                     
OK      GTE              15% Discount                                                     MRC         Yes         Yes     
OK      GTE              Service Charge                                                   NRC         Yes          No     
                   Business:                                                                                              
                       Discount Plan:                                                                                     
OK      GTE              10% Discount                                                     MRC         Yes         Yes     
OK      GTE              Service Charge                                                   NRC         Yes          No     
                   Discount Plan:                                                                                         
OK      GTE              15% Discount                                                     MRC         Yes         Yes     
OK      GTE              Service Charge                                                   NRC         Yes          No     
                       Discount Plan:                                                                                     
OK      GTE              20% Discount                                                     MRC         Yes         Yes     
OK      GTE              Service Charge                                                   NRC         Yes          No     
                   Corridor Optional Saver:                                                                               
                       Residence:                                                                                         
                         Block-of-Time:                                                                                   
OK      GTE                Monthly Rate for First Hour (1-Way Originating Calling)        MRC         Yes         Yes     
OK      GTE                Additional Per Minute                                         USAGE        Yes         Yes     
OK      GTE                Service Charge                                                 NRC         Yes          No     
                                                                                                                          

<CAPTION>
                                                                                       RETAIL      AVOIDED        RESALE  
 ST      CO  SEC                 SERVICE DESCRIPTION                                    RATE         COST          RATE 
 --      --  ---                 -------------------                                   ------       ------        ------
<S>     <C>  <C>   <C>                                                                  <C>          <C>           <C>      
                    Saver:                                                          
                   Residence:                                                       
                       Block-of-Time:                                               
OK      GTE              Monthly Rate for First Hour                                    $10.25       $1.12         $9.13
OK      GTE              Additional Per Minute                                           $0.16       $0.02         $0.14
OK      GTE              Service Charge                                                  $5.00         N/A         $5.00
                   Business:                                                        
                       Block-of-Time:                                               
OK      GTE              Monthly Rate for First Hour                                    $14.40       $1.57        $12.83
OK      GTE              Additional Per Minute                                           $0.23       $0.03         $0.20
OK      GTE              Service Charge                                                  $7.50         N/A         $7.50
                   Residence:                                                       
                       Discount Plan:                                               
OK      GTE              15% Discount                                                    $3.00       $0.33         $2.67
OK      GTE              Service Charge                                                  $5.00         N/A         $5.00
                   Business:                                                        
                       Discount Plan:                                               
OK      GTE              10% Discount                                                    $3.00       $0.33         $2.67
OK      GTE              Service Charge                                                  $7.50         N/A         $7.50
                   Discount Plan:                                                   
OK      GTE              15% Discount                                                    $8.00       $0.87         $7.13
OK      GTE              Service Charge                                                  $7.50         N/A         $7.50
                       Discount Plan:                                               
OK      GTE              20% Discount                                                   $20.00       $2.19        $17.81
OK      GTE              Service Charge                                                  $7.50         N/A         $7.50
                   Corridor Optional Saver:                                         
                       Residence:                                                   
                         Block-of-Time:                                             
OK      GTE                Monthly Rate for First Hour (1-Way Originating Calling)       $4.80       $0.52         $4.28
OK      GTE                Additional Per Minute                                         $0.07       $0.01         $0.06
OK      GTE                Service Charge                                                $5.00         N/A         $5.00

</TABLE>

                                    PAGE 14

<PAGE>   111
                     GTE TELEPHONE OPERATIONS HEADQUARTERS
                 RESALE PRODUCTS & SERVICES - STATE OF OKLAHOMA
                          GTESW EXCHANGE NETWORK TARIFF



<TABLE>
<CAPTION>
                                                                                                 BILLING      RESALE      DISCOUNT  
 ST      CO  SEC                 SERVICE DESCRIPTION                                               TYPE      POSITION     POSITION  
 --      --  ---                 -------------------                                               ----      --------     --------  
<S>     <C>    <C>      <C>                                                                      <C>           <C>         <C>      
                                                                                                                                    
                             Business:                                                                                              
                                 Block-of-Time:                                                                                     
OK      GTE                        Monthly Rate for First Hour (1-Way Originating Calling)          MRC          Yes         Yes    
OK      GTE                        Additional Per Minute                                           USAGE         Yes         Yes    
OK      GTE                        Service Charge                                                   NRC          Yes          No    
                             Residence:                                                                                             
OK      GTE                      Unlimited Usage (1-Way Originating Calling)                        MRC          Yes         Yes    
OK      GTE                      Service Charge                                                     NRC          Yes          No    
                             Business:                                                                                              
OK      GTE                      Unlimited Usage (1-Way Originating Calling)                        MRC          Yes         Yes    
OK      GTE                      Service Charge                                                     NRC          Yes          No    
                             Residence:                                                                                             
OK      GTE                      Unlimited Usage (2-Way Calling)                                    MRC          Yes         Yes    
OK      GTE                      Service Charge                                                     NRC          Yes          No    
                             Business:                                                                                              
OK      GTE                      Unlimited Usage (2-Way Calling)                                    MRC          Yes         Yes    
OK      GTE                      Service Charge                                                     NRC          Yes          No    
                        SWB WIDE AREA TELECOMMUNICATIONS SERVICES:                                                                  
                           800 Service:                                                                                             
OK      GTE                  Access Line                                                            MRC          Yes         Yes    
OK      GTE                  Service Charge - Installation or Move                                  NRC          Yes          No    
OK      GTE                  Service Charge - Number Change                                         NRC          Yes          No    
                              Usage Rates (per Hour):                                                                               
OK      GTE                      Day - First 10 Hours                                               USAGE        Yes         Yes    
OK      GTE                      Day - Next 16 Hours                                                USAGE        Yes         Yes    
OK      GTE                      Day - Next 25 Hours                                                USAGE        Yes         Yes    
OK      GTE                      Day - Over 51 Hours                                                USAGE        Yes         Yes    
                                                                                                                                    
OK      GTE                      Evening - First 10 Hours                                           USAGE        Yes         Yes    
OK      GTE                      Evening - Next 16 Hours                                            USAGE        Yes         Yes    
OK      GTE                      Evening - Next 25 Hours                                            USAGE        Yes         Yes    


<CAPTION>
                                                                                                 RETAIL      AVOIDED        RESALE  
 ST      CO  SEC                 SERVICE DESCRIPTION                                              RATE         COST          RATE 
 --      --  ---                 -------------------                                             ------       ------        ------
<S>     <C>    <C>      <C>                                                                       <C>        <C>           <C>      
                                                                                               
                             Business:                                                         
                                 Block-of-Time:                                                
OK      GTE                        Monthly Rate for First Hour (1-Way Originating Calling)         $6.25       $0.68         $5.57
OK      GTE                        Additional Per Minute                                           $0.09       $0.01         $0.08
OK      GTE                        Service Charge                                                  $7.50         N/A         $7.50
                             Residence:                                                        
OK      GTE                      Unlimited Usage (1-Way Originating Calling)                      $20.00       $2.19        $17.81
OK      GTE                      Service Charge                                                    $5.00         N/A         $5.00
                             Business:                                                         
OK      GTE                      Unlimited Usage (1-Way Originating Calling)                      $30.00       $3.28        $26.72
OK      GTE                      Service Charge                                                    $7.50         N/A         $7.50
                             Residence:                                                        
OK      GTE                      Unlimited Usage (2-Way Calling)                                  $30.00       $3.28        $26.72
OK      GTE                      Service Charge                                                    $5.00         N/A         $5.00
                             Business:                                                         
OK      GTE                      Unlimited Usage (2-Way Calling)                                  $40.00       $4.37        $35.63
OK      GTE                      Service Charge                                                    $7.50         N/A         $7.50
                        SWB WIDE AREA TELECOMMUNICATIONS SERVICES:                             
                           800 Service:                                                        
OK      GTE                  Access Line                                                          $37.30       $4.08        $33.22
OK      GTE                  Service Charge - Installation or Move                               $307.00         N/A       $307.00
OK      GTE                  Service Charge - Number Change                                       $18.50         N/A        $18.50
                              Usage Rates (per Hour):                                          
OK      GTE                      Day - First 10 Hours                                             $23.29       $2.55        $20.74
OK      GTE                      Day - Next 16 Hours                                              $22.16       $2.42        $19.74
OK      GTE                      Day - Next 25 Hours                                              $21.08       $2.30        $18.78
OK      GTE                      Day - Over 51 Hours                                              $20.05       $2.19        $17.86
                                                                                               
OK      GTE                      Evening - First 10 Hours                                         $17.22       $1.88        $15.34
OK      GTE                      Evening - Next 16 Hours                                          $16.37       $1.79        $14.58
OK      GTE                      Evening - Next 25 Hours                                          $15.56       $1.70        $13.86
                                                                                               
</TABLE>

                                    PAGE 15
<PAGE>   112
Issue Date: 06/26/97

                      GTE TELEPHONE OPERATIONS HEADQUARTERS
                 RESALE PRODUCTS & SERVICES - STATE OF OKLAHOMA
                          GTESW EXCHANGE NETWORK TARIFF
<TABLE>
<CAPTION>
                                                                 BILLING      RESALE    DISCOUNT   RETAIL      AVOIDED  RESALE
 ST      CO     SEC                 SERVICE DESCRIPTION           TYPE       POSITION   POSITION    RATE        COST     RATE
 --      --     ---                 -------------------           ----       --------   --------   ------      -------  ------
<S>     <C>           <C>                                         <C>          <C>         <C>     <C>          <C>     <C>     

OK      GTE                Evening - Over 51 Hours                USAGE        Yes         Yes     $14.79       $1.62   $13.17
OK      GTE                Night/Weekend - First 10 Hours         USAGE        Yes         Yes     $13.58       $1.48   $12.10
OK      GTE                Night/Weekend - Next 16 Hours          USAGE        Yes         Yes     $12.90       $1.41   $11.49
OK      GTE                Night/Weekend - Next 25 Hours          USAGE        Yes         Yes     $12.25       $1.34   $10.91
OK      GTE                Night/Weekend - Over 51 Hours          USAGE        Yes         Yes     $11.63       $1.27   $10.36
                      Outward WATS:                               
OK      GTE             Access Line                                MRC         Yes         Yes     $36.60       $4.00   $32.60
OK      GTE             Service Charge - Installation or Move      NRC         Yes          No    $307.00         N/A  $307.00
OK      GTE             Service Charge - Number Change             NRC         Yes          No     $18.50         N/A   $18.50
                        Usage Rates (per Hour):
OK      GTE                Day - First 9 Hours                    USAGE        Yes         Yes     $19.40       $2.12   $17.28
OK      GTE                Day - Next 16 Hours                    USAGE        Yes         Yes     $18.45       $2.02   $16.43
OK      GTE                Day - Next 25 Hours                    USAGE        Yes         Yes     $17.55       $1.92   $15.63
OK      GTE                Day - Over 50 Hours                    USAGE        Yes         Yes     $16.69       $1.82   $14.87
OK      GTE                Evening - First 9 Hours                USAGE        Yes         Yes     $14.30       $1.56   $12.74
OK      GTE                Evening - Next 16 Hours                USAGE        Yes         Yes     $13.59       $1.49   $12.10
OK      GTE                Evening - Next 25 Hours                USAGE        Yes         Yes     $12.92       $1.41   $11.51
OK      GTE                Evening - Over 50 Hours                USAGE        Yes         Yes     $12.27       $1.34   $10.93
OK      GTE                Night/Weekend - First 9 Hours          USAGE        Yes         Yes     $11.24       $1.23   $10.01
OK      GTE                Night/Weekend - Next 16 Hours          USAGE        Yes         Yes     $10.67       $1.17    $9.50
OK      GTE                Night/Weekend - Next 25 Hours          USAGE        Yes         Yes     $10.13       $1.11    $9.02
OK      GTE                Night/Weekend - Over 50 Hours          USAGE        Yes         Yes      $9.62       $1.05    $8.57
                        Business Line 800:
OK      GTE             Change Number Charge (1 or 2 terms)        NRC         Yes          No     $20.00         N/A   $20.00
OK      GTE             Change Number Charge (3 to 10 terms)       NRC         Yes          No     $90.00         N/A   $90.00
OK      GTE             Change Number Charge (over 10 terms)       NRC         Yes          No    $225.00         N/A  $225.00

</TABLE>


                                    Page 16


<PAGE>   113
Issue Date: 06/26/97

                      GTE TELEPHONE OPERATIONS HEADQUARTERS
                 RESALE PRODUCTS & SERVICES - STATE OF OKLAHOMA
                          GTESW EXCHANGE NETWORK TARIFF
<TABLE>
<CAPTION>
                                                                         BILLING     RESALE    DISCOUNT   RETAIL  AVOIDED  RESALE
 ST      CO     SEC                 SERVICE DESCRIPTION                   TYPE      POSITION   POSITION    RATE    COST     RATE
 --      --     ---                 -------------------                   ----      --------   --------   ------  -------  -----
<S>     <C>  <C>        <C>                                                <C>        <C>         <C>    <C>       <C>    <C>
                                                                        
OK      GTE             Call Detail Information                             NRC       Yes          No     $12.50     N/A   $12.50
                                                                        
OK      GTE             Access Line                                         MRC       Yes         Yes     $10.00   $1.09    $8.91
                                                                        
                         Usage Rates (per hour):                        
OK      GTE                First 10 Hours                                  USAGE      Yes         Yes     $12.00   $1.31   $10.69
OK      GTE                Over 10 Hours                                   USAGE      Yes         Yes     $10.80   $1.18    $9.62
                                                                        
OK      GTE             Residence Line 800:                             
OK      GTE             Change Number Charge (1 or 2 terms)                 NRC       Yes          No     $20.00     N/A   $20.00
OK      GTE             Change Number Charge (3 to 10 terms)                NRC       Yes          No     $90.00     N/A   $90.00
OK      GTE             Change Number Charge (over 10 terms)                NRC       Yes          No    $225.00     N/A  $225.00
                                                                        
OK      GTE             Call Detail Information                             NRC       Yes          No     $12.50     N/A   $12.50
                                                                        
OK      GTE             Access Line                                         MRC       Yes         Yes      $3.95   $0.43    $3.52
                                                                        
OK      GTE             Charge to Change Usage Plans                        NRC       Yes          No      $5.00     N/A    $5.00
                                                                        
                         Usage Rates:                                  
                           Per Minute of Use Plan:                     
OK      GTE                   Day Rate                                     USAGE      Yes         Yes      $0.20   $0.02    $0.18
OK      GTE                   Evening/Night/Weekend Rate                   USAGE      Yes         Yes      $0.18   $0.02    $0.16
                           Block of Time Plan:                          
                              1 Hour Block Plan:                        
OK      GTE                       Monthly Rate for First Hour               MRC       Yes         Yes      $9.00   $0.98    $8.02
OK      GTE                       Additional Per Minute                    USAGE      Yes         Yes      $0.14   $0.02    $0.12
                              2 Hour Block Plan                         
OK      GTE                       Monthly Rate for Two Hours                MRC       Yes         Yes     $15.00   $1.64   $13.36
OK      GTE                       Additional Per Minute                    USAGE      Yes         Yes      $0.12   $0.01    $0.11
               EXCHG
             NET TA CENTRANET:
</TABLE>



                                    Page 17
<PAGE>   114
Issue Date: 06/26/97

                      GTE TELEPHONE OPERATIONS HEADQUARTERS
                 RESALE PRODUCTS & SERVICES - STATE OF OKLAHOMA
                          GTESW EXCHANGE NETWORK TARIFF
<TABLE>
<CAPTION>
                                                                                    BILLING   RESALE   DISCOUNT  RETAIL  AVOIDED 
 ST    CO     SEC             SERVICE DESCRIPTION                                    TYPE    POSITION  POSITION   RATE     COST  
 --    --     ---             -------------------                                    ----    --------  --------  ------  ------- 
<S>   <C>    <C>  <C>                                                              <C>       <C>      <C>      <C>      <C>       
                                                                                                                                 
OK    GTE    19   Centrex Local Line - First 25 Lines (2-25)     Month-to-Month C  MRC       Yes      Yes       $16.75  $1.83    
OK    GTE         Centrex Local Line - Next 25 Lines (26-50)     Month-to-Month C  MRC       Yes      Yes       $16.50  $1.80    
OK    GTE         Centrex Local Line - Next 50 Lines (51-100)    12 Month Contrac  MRC       Yes      Yes       $16.25  $1.78    
OK    GTE         Centrex Local Line - Next 50 Lines (51-100)    36 Month Contrac  MRC       Yes      Yes       $16.00  $1.75    
OK    GTE         Network Access Register - Rate Groups 1 and 2                    MRC       Yes       No       $23.00    N/A    
OK    GTE         Network Access Register - Rate Group 3                           MRC       Yes       No       $31.06    N/A    
OK    GTE         Restricted Station                                               MRC       Yes      Yes        $6.00  $0.66    
OK    GTE         PAK1000 Per Customer Group NRC                                   NRC       Yes       No      $100.00    N/A    
OK    GTE         PAK1000 Per Station                                              MRC       Yes      Yes        $2.00  $0.22    
OK    GTE         PAK2000 Per Customer Group NRC                                   NRC       Yes       No      $150.00    N/A    
OK    GTE         PAK2000 Per Station                                              MRC       Yes      Yes        $2.30  $0.25    
OK    GTE         PAK3000 Per Customer Group NRC                                   NRC       Yes       No      $215.00    N/A    
OK    GTE         PAK3000 Per Station                                              MRC       Yes      Yes        $2.50  $0.27    
OK    GTE         PACKAGE Programming ARS/FRS NRC                                  NRC       Yes       No      $120.00    N/A    
                  Line Connection Charge:                                                                                        
OK    GTE            Line Size:  2                                                 NRC       Yes       No       $18.00    N/A    
OK    GTE            Line Size:  3 to 5                                            NRC       Yes       No       $12.00    N/A    
OK    GTE            Line Size:  6 to 10                                           NRC       Yes       No       $10.00    N/A    
OK    GTE            Line Size:  11 to 25                                          NRC       Yes       No        $6.40    N/A    
OK    GTE            Line Size:  26 to 50                                          NRC       Yes       No        $4.00    N/A    
OK    GTE            Line Size:  51 to 75                                          NRC       Yes       No        $3.20    N/A    
OK    GTE            Line Size:  76 to 100                                         NRC       Yes       No        $3.00    N/A    
                  Optional System Features:                                                                                      
OK    GTE            WATS Access                                                   NRC       Yes       No       $25.00    N/A    
OK    GTE            800 Service Access                                            NRC       Yes       No       $25.00    N/A    
OK    GTE            Tie Facility Access                                           NRC       Yes       No       $25.00    N/A    
OK    GTE            FX Access                                                     NRC       Yes       No       $25.00    N/A    

</TABLE>



<TABLE>
<CAPTION>
                                                                                     RESALE
 ST    CO     SEC             SERVICE DESCRIPTION                                     RATE
 --    --     ---             -------------------                                    -----
<S>   <C>    <C>  <C>                                                               <C>
                                                                                  
OK    GTE    19   Centrex Local Line - First 25 Lines (2-25)     Month-to-Month C    $14.92
OK    GTE         Centrex Local Line - Next 25 Lines (26-50)     Month-to-Month C    $14.70
OK    GTE         Centrex Local Line - Next 50 Lines (51-100)    12 Month Contrac    $14.47
OK    GTE         Centrex Local Line - Next 50 Lines (51-100)    36 Month Contrac    $14.25
OK    GTE         Network Access Register - Rate Groups 1 and 2                      $23.00
OK    GTE         Network Access Register - Rate Group 3                             $31.06
OK    GTE         Restricted Station                                                  $5.34
OK    GTE         PAK1000 Per Customer Group NRC                                    $100.00
OK    GTE         PAK1000 Per Station                                                 $1.78
OK    GTE         PAK2000 Per Customer Group NRC                                    $150.00
OK    GTE         PAK2000 Per Station                                                 $2.05
OK    GTE         PAK3000 Per Customer Group NRC                                    $215.00
OK    GTE         PAK3000 Per Station                                                 $2.23
OK    GTE         PACKAGE Programming ARS/FRS NRC                                   $120.00
                  Line Connection Charge:                                         
OK    GTE            Line Size:  2                                                   $18.00
OK    GTE            Line Size:  3 to 5                                              $12.00
OK    GTE            Line Size:  6 to 10                                             $10.00
OK    GTE            Line Size:  11 to 25                                             $6.40
OK    GTE            Line Size:  26 to 50                                             $4.00
OK    GTE            Line Size:  51 to 75                                             $3.20
OK    GTE            Line Size:  76 to 100                                            $3.00
                  Optional System Features:                                       
OK    GTE            WATS Access                                                     $25.00
OK    GTE            800 Service Access                                              $25.00
OK    GTE            Tie Facility Access                                             $25.00
OK    GTE            FX Access                                                       $25.00

</TABLE>


                                    Page 18
<PAGE>   115
Issue Date: 06/26/97

                      GTE TELEPHONE OPERATIONS HEADQUARTERS
                 RESALE PRODUCTS & SERVICES - STATE OF OKLAHOMA
                          GTESW EXCHANGE NETWORK TARIFF
<TABLE>
<CAPTION>
                                                             BILLING     RESALE      DISCOUNT      RETAIL       AVOIDED      RESALE
 ST    CO     SEC             SERVICE DESCRIPTION             TYPE      POSITION     POSITION       RATE          COST        RATE
 --    --     ---             -------------------             ----      --------     --------      ------       -------       -----
<S>   <C>     <C>   <C>                                      <C>          <C>          <C>       <C>          <C>         <C>

OK    GTE              Limited Auto Call Distribution             NRC       Yes          No        $25.00         N/A        $25.00
OK    GTE              Preferential Hunting                       NRC       Yes          No        $25.00         N/A        $25.00
OK    GTE              Stop Hunt                                  NRC       Yes          No        $25.00         N/A        $25.00
OK    GTE              Priority Queuing                           NRC       Yes          No        $25.00         N/A        $25.00
OK    GTE              Authorization Codes                        NRC       Yes          No        $25.00         N/A        $25.00
OK    GTE              Terminal Make Busy                         NRC       Yes          No        $25.00         N/A        $25.00
OK    GTE              Paging/Public Address Access               NRC       Yes          No       $140.00         N/A       $140.00
OK    GTE              Paging/Public Address Access               MRC       Yes         Yes        $30.00       $3.28        $26.72
OK    GTE              Dictation Access                           NRC       Yes          No       $140.00         N/A       $140.00
OK    GTE              Dictation Access                           MRC       Yes         Yes        $30.00       $3.28        $26.72
OK    GTE              Code Calling Access                        NRC       Yes          No       $140.00         N/A       $140.00
OK    GTE              Code Calling Access                        MRC       Yes         Yes        $30.00       $3.28        $26.72
OK    GTE              Music on Hold                              NRC       Yes          No        $50.00         N/A        $50.00
OK    GTE              Music on Hold                              MRC       Yes         Yes        $10.00       $1.09         $8.91
OK    GTE              Custom Recorded Announcement               NRC       Yes          No       $260.00         N/A       $260.00
OK    GTE              Custom Recorded Announcement               MRC       Yes         Yes        $45.00       $4.92        $40.08
OK    GTE              8 Port Conference Calling                  NRC       Yes          No       $160.00         N/A       $160.00
OK    GTE              8 Port Conference Calling                  MRC       Yes         Yes       $110.00      $12.02        $97.98
OK    GTE              Mag Tape SMDR (per line)                   NRC       Yes          No         $0.30         N/A         $0.30
OK    GTE              T1 Access                                  NRC       Yes          No       $100.00         N/A       $100.00
OK    GTE              T1 Access                                  MRC       Yes         Yes       $105.00      $11.48        $93.52
OK    GTE              Priority Set Interface                     MRC       Yes         Yes         $5.00       $0.55         $4.45
OK    GTE              Pseudo Numbers                             MRC       Yes         Yes         $6.00       $0.66         $5.34
OK    GTE              Automatic Route Selection                  MRC       Yes         Yes       $175.00      $19.13       $155.87
                    Optional Attendant Features:
OK    GTE              Non-Data Link Console Interface            NRC       Yes          No        $50.00         N/A        $50.00
OK    GTE              Data Link Console Interface                NRC       Yes          No       $210.00         N/A       $210.00
OK    GTE              Data Link Console Interface                MRC       Yes         Yes        $90.00       $9.84        $80.16
OK    GTE              Attendant Identification 
                       Multiple Directory Number                  NRC       Yes          No        $25.00         N/A        $25.00
OK    GTE              Pre-Determined Night Answer                NRC       Yes          No        $25.00         N/A        $25.00
OK    GTE              Universal Night Answer                     NRC       Yes          No        $65.00         N/A        $65.00
</TABLE>


                                    Page 19
<PAGE>   116
                  GTE TELEPHONE OPERATIONS HEADQUARTERS
                 RESALE PRODUCTS & SERVICES - STATE OF OKLAHOMA
                          GTESW EXCHANGE NETWORK TARIFF
<TABLE>
<CAPTION>
                                                                      BILLING RESALE   DISCOUNT RETAIL       AVOIDED      RESALE
 ST      CO     SEC                 SERVICE DESCRIPTION                TYPE  POSITION  POSITION  RATE          COST        RATE
 --      --     ---                 -------------------                ----  --------  -------- ------       -------       -----
<S>     <C>     <C>    <C>                                              <C>     <C>    <C>      <C>           <C>          <C>

OK      GTE                  Universal Night Answer                      MRC     Yes    Yes       $10.00       $1.09         $8.91
OK      GTE                  Mixed Night Answer                          NRC     Yes    No        $65.00         N/A        $65.00
OK      GTE                  Mixed Night Answer                          MRC     Yes    Yes       $10.00       $1.09         $8.91
OK      GTE                  Additional Console Member                   NRC     Yes    No       $185.00         N/A       $185.00
OK      GTE                  Additional Console Member                   MRC     Yes    Yes       $90.00       $9.84        $80.16
OK      GTE                  Flexible Night Answer                       MRC     Yes    Yes        $0.25       $0.03         $0.22
                          Data Base Changes:
OK      GTE                  Major Software Additions                    NRC     Yes    No       $100.00         N/A       $100.00
OK      GTE                  Routine Software Change                     NRC     Yes    No        $50.00         N/A        $50.00
OK      GTE                  Minor Software Change                       NRC     Yes    No        $25.00         N/A        $25.00
OK      GTE                  Hourly Rate For Non-Listed Additions
                             or Changes                                  NRC     Yes    No        $50.00         N/A        $50.00
                  29   SWITCHED DATA CUSTOMER LINE SERVICES
OK      GTE               Individual Line Loop Extension Access          MRC     Yes    Yes       $50.00       $5.47        $44.54
OK      GTE               Individual Line Loop Extension Access          NRC     Yes    No        $50.00         N/A        $50.00
OK      GTE               Individual Line Loop Extension Channel         MRC     Yes    Yes       $12.00       $1.31        $10.69
OK      GTE               Individual Line Loop Extension Channel         NRC     Yes    No        $50.00         N/A        $50.00
OK      GTE               Central Office Termination                     MRC     Yes    Yes      $150.00      $16.40       $133.61
OK      GTE               Central Office Termination                     NRC     Yes    No       $125.00         N/A       $125.00
OK      GTE               Central Office Channelization                  MRC     Yes    Yes        $5.00       $0.55         $4.45
OK      GTE               Data Direct Connect                            MRC     Yes    Yes        $1.00       $0.11         $0.89
OK      GTE               Data Closed User Group                         MRC     Yes    Yes        $1.00       $0.11         $0.89
OK      GTE               Feature Package Data 1000                      MRC     Yes    Yes        $3.00       $0.33         $2.67
OK      GTE               Software Reconfiguration                       NRC     Yes    No        $12.75         N/A        $12.75

                       SWB PRIVATE LINE TARIFF
                       INTRALATA INTEREXCHANGE PRIVATE LINES
                          Series 200
                   2      Type 102
OK      GTE                  Local Channel, ea                           MRC     Yes    No        $11.00         N/A        $11.00
</TABLE>

                                    PAGE 20

<PAGE>   117
                      GTE TELEPHONE OPERATIONS HEADQUARTERS
                 RESALE PRODUCTS & SERVICES - STATE OF OKLAHOMA
                          GTESW EXCHANGE NETWORK TARIFF
<TABLE>
<CAPTION>
                                                                             BILLING   RESALE   DISCOUNT  RETAIL   AVOIDED   RESALE
ST      CO        SEC                  SERVICE DESCRIPTION                    TYPE    POSITION  POSITION   RATE     COST      RATE
- --      --        ---                  -------------------                   -------  --------  --------  ------   -------   ------
<S>     <C>       <C>        <C>                                              <C>      <C>      <C>     <C>        <C>     <C>     
OK      GTE                                                                    NRC      Yes      No      $210.00    N/A      $210.00
OK      GTE                     Interoffice Channel, ea mi                     MRC      Yes      No        $5.25    N/A        $5.25
OK      GTE                     Interoffice Channel Terminal, per terminal,                                                         
                                2 req. per ch.                                 MRC      Yes      No        $6.30    N/A        $6.30
                                IX Channel, per mi, per channel                                                                     
OK      GTE                        0 to 150 mi, ea mi                          MRC      Yes      No        $5.25    N/A        $5.25
OK      GTE                        Ea additional mi over 150                   MRC      Yes      No        $5.25    N/A        $5.25
OK      GTE                     IX Channel terminal per channel                MRC      Yes      No       $11.65    N/A       $11.65
                  2             TYPE 250                                                                                            
OK      GTE                     Local Channel, ea                              NRC      Yes      No      $280.00    N/A      $280.00
OK      GTE                        Half-duplex                                 MRC      Yes      No       $19.00    N/A       $19.00
OK      GTE                        Duplex                                      MRC      Yes      No       $27.40    N/A       $27.40
                                Interoffice Channel, ea mi                                                                          
OK      GTE                        Half-duplex                                 MRC      Yes      No        $3.00    N/A        $3.00
OK      GTE                        Duplex                                      MRC      Yes      No        $4.00    N/A        $4.00
                                Interoffice Channel Terminal, per                                                                   
                                terminal, 2 req. per ch.                                                                            
OK      GTE                        Half-duplex                                 MRC      Yes      No       $12.35    N/A       $12.35
OK      GTE                        Duplex                                      MRC      Yes      No       $12.35    N/A       $12.35
                                IX Channel, ea mi                                                                                   
                                   Half-duplex                                                                                      
OK      GTE                            0 to 150 mi, ea mi                      MRC      Yes      No        $4.20    N/A        $4.20
OK      GTE                            Ea additional mi over 150               MRC      Yes      No        $2.30    N/A        $2.30
                                   Duplex                                                                                           
OK      GTE                            0 to 150 mi, ea mi                      MRC      Yes      No        $4.20    N/A        $4.20
OK      GTE                            Ea additional mi over 150               MRC      Yes      No        $2.30    N/A        $2.30
                  2             IXC Terminal, per terminal, 2 required per IXC                                                      
OK      GTE                        Half-duplex                                 MRC      Yes      No       $42.65    N/A       $42.65
OK      GTE                        Duplex                                      MRC      Yes      No       $43.45    N/A       $43.45
                  2          Type 251                                                                                               
OK      GTE                     Local Channel, ea                              NRC      Yes      No      $280.00    N/A      $280.00
OK      GTE                        Half-duplex                                 MRC      Yes      No       $22.85    N/A       $22.85
OK      GTE                        Duplex                                      MRC      Yes      No       $31.25    N/A       $31.25
                                 Interoffice Channel, ea mi
</TABLE>


                                     PAGE 21
<PAGE>   118


                      GTE TELEPHONE OPERATIONS HEADQUARTERS
                 RESALE PRODUCTS & SERVICES - STATE OF OKLAHOMA
                          GTESW EXCHANGE NETWORK TARIFF

<TABLE>
<CAPTION>

                                                                     BILLING      RESALE     DISCOUNT  RETAIL AVOIDED     RESALE
ST      CO       SEC              SERVICE DESCRIPTION                  TYPE       POSITION   POSITION   RATE    COST        RATE
- --      ---      ---              -------------------                -------      --------   --------  ------ -------     ------
<S>     <C>      <C>      <C>                                           <C>         <C>      <C>       <C>      <C>        <C>
OK      GTE                   Half-duplex                               MRC         Yes      No        $3.00    N/A        $3.00
OK      GTE                   Duplex                                    MRC         Yes      No        $4.00    N/A        $4.00
                            Interoffice Channel Terminal, per
                              terminal, 2 req. per ch.       
OK      GTE                   Half-duplex                               MRC         Yes      No        $6.85    N/A        $6.85
OK      GTE                   Duplex                                    MRC         Yes      No        $6.85    N/A        $6.85
                            IX Channel, ea mi                
                               Half-duplex                   
OK      GTE                     0 to 150 mi, ea mi                      MRC         Yes      No        $3.60    N/A        $3.60
OK      GTE                     Ea additional mi over 150               MRC         Yes      No        $2.60    N/A        $2.60
                               Duplex
OK      GTE                     0 to 150 mi, ea mi                      MRC         Yes      No        $3.60    N/A        $3.60
OK      GTE                     Ea additional mi over 150               MRC         Yes      No        $2.60    N/A        $2.60
                  2         IXC Terminal, per terminal, 2 required per IXC
OK      GTE                    Half-duplex                              MRC         Yes      No       $40.40    N/A       $40.40
OK      GTE                    Duplex                                   MRC         Yes      No       $41.15    N/A       $41.15
                  2       Series 300 and 400
                           Local Channel, ea
OK      GTE                 Type 314B (1)                               MRC         Yes      No       $39.25    N/A       $39.25
OK      GTE                 Type 314B (1)                               NRC         Yes      No      $535.00    N/A      $535.00
OK      GTE                 Type 314C                                   NRC         Yes      No      $450.00    N/A      $450.00
OK      GTE                 Type 315                                    MRC         Yes      No       $12.95    N/A       $12.95
OK      GTE                 Type 315                                    NRC         Yes      No      $240.00    N/A      $240.00
OK      GTE                 Type 317A                                   MRC         Yes      No       $16.00    N/A       $16.00
OK      GTE                 Type 317A                                   NRC         Yes      No      $405.00    N/A      $405.00
OK      GTE                 Type 317B                                   MRC         Yes      No       $14.75    N/A       $14.75
OK      GTE                 Type 317B                                   NRC         Yes      No      $410.00    N/A      $410.00
OK      GTE                 Type 322                                    MRC         Yes      No       $32.00    N/A       $32.00
OK      GTE                 Type 322                                    NRC         Yes      No      $470.00    N/A      $470.00
OK      GTE                 Type 342                                    MRC         Yes      No       $17.00    N/A       $17.00
OK      GTE                 Type 342                                    NRC         Yes      No      $260.00    N/A      $260.00
OK      GTE                 Type 343                                    MRC         Yes      No       $40.00    N/A       $40.00
OK      GTE                 Type 343                                    NRC         Yes      No      $275.00    N/A      $275.00
</TABLE>



                                    PAGE 22
<PAGE>   119
                      GTE TELEPHONE OPERATIONS HEADQUARTERS
                 RESALE PRODUCTS & SERVICES - STATE OF OKLAHOMA
                          GTESW EXCHANGE NETWORK TARIFF

Issue Date: 06/26/97

<TABLE>
<CAPTION>

                                               BILLING   RESALE    DISCOUNT    RETAIL      AVOIDED    RESALE  
ST     CO    SEC       SERVICE DESCRIPTION      TYPE    POSITION   POSITION     RATE        COST       RATE
- --     --    ---       -------------------      ----   --------    --------    ------      -----      ------
<S>   <C>   <C>   <C>                             <C>      <C>       <C>       <C>           <C>      <C>                    
OK     GTE        Type 420                        MRC      Yes        No         $29.50      N/A       $29.50      
OK     GTE        Type 420                        NRC      Yes        No        $265.00      N/A      $265.00      
OK     GTE        Type 422                        MRC      Yes        No         $28.75      N/A       $28.75      
OK     GTE        Type 422                        NRC      Yes        No        $265.00      N/A      $265.00      
OK     GTE        Type 423                        MRC      Yes        No         $11.00      N/A       $11.00      
OK     GTE        Type 423                        NRC      Yes        No        $260.00      N/A      $260.00      
OK     GTE        Type 424 (1)                    MRC      Yes        No         $30.25      N/A       $30.25      
OK     GTE        Type 424 (1)                    NRC      Yes        No        $310.00      N/A      $310.00      
OK     GTE        Type 425                        MRC      Yes        No         $22.50      N/A       $22.50      
OK     GTE        Type 425                        NRC      Yes        No        $260.00      N/A      $260.00      
OK     GTE        Type 428                        MRC      Yes        No         $12.75      N/A       $12.75      
OK     GTE        Type 428                        NRC      Yes        No        $260.00      N/A      $260.00      
OK     GTE        Type 435                        MRC      Yes        No         $31.25      N/A       $31.25      
OK     GTE        Type 435                        NRC      Yes        No        $250.00      N/A      $250.00      
OK     GTE        Interoffice Channel, ea mi      MRC      Yes        No          $3.50      N/A        $3.50      
OK     GTE        Interoffice Channel Terminal    MRC      Yes        No          $4.20      N/A        $4.20      
                  IX Channel, mi                                                                                   
OK     GTE        0 to 150 mi, ea mi              MRC      Yes        No          $2.70      N/A        $2.70      
OK     GTE        Ea additional mi over 150       MRC      Yes        No          $2.15      N/A        $2.15      
              2   Interexchange Channel Terminal                                                                  
OK     GTE        Type 314B                       MRC      Yes        No         $12.95      N/A       $12.95      
OK     GTE        Type 314C                       MRC      Yes        No         $15.00      N/A       $15.00      
OK     GTE        Type 317A                       MRC      Yes        No         $18.85      N/A       $18.85      
OK     GTE        Type 317B                       MRC      Yes        No         $12.95      N/A       $12.95      
OK     GTE        Type 322                        MRC      Yes        No         $19.40      N/A       $19.40      
OK     GTE        Type 342                        MRC      Yes        No         $12.95      N/A       $12.95      
OK     GTE        Type 343                        MRC      Yes        No         $12.95      N/A       $12.95      
OK     GTE        Type 420                        MRC      Yes        No         $15.15      N/A       $15.15      
OK     GTE        Type 422                        MRC      Yes        No         $15.15      N/A       $15.15      
OK     GTE        Type 423                        MRC      Yes        No         $12.95      N/A       $12.95      
OK     GTE        Type 424                        MRC      Yes        No         $12.95      N/A       $12.95      
OK     GTE        Type 425                        MRC      Yes        No         $12.95      N/A       $12.95      

</TABLE>                                                                


                                    Page 23
                                                                                
<PAGE>   120
                  GTE TELEPHONE OPERATIONS HEADQUARTERS
                 RESALE PRODUCTS & SERVICES - STATE OF OKLAHOMA
                          GTESW EXCHANGE NETWORK TARIFF
<TABLE>
<CAPTION>
                                                                                                  BILLING     RESALE      DISCOUNT
 ST      CO     SEC                 SERVICE DESCRIPTION                                            TYPE      POSITION     POSITION
 --      --     ---                 -------------------                                            ----      --------     --------
<S>     <C>     <C>       <C>                                                                <C>          <C>          <C>        
OK      GTE                     Type 428                                                            MRC         Yes          No     
OK      GTE                     Type 435                                                            MRC         Yes          No 
OK      GTE       2          Bridging Charge, (multi point service), per bridged channel            MRC         Yes          No     
                             Channel Conditioning                                                                                   
                                Type C1                                                                                             
OK      GTE                        Two-point not arranged for switching, per station                MRC         Yes          No     
OK      GTE                        Two-point not arranged for switching, per station                NRC         Yes          No     
OK      GTE                        Two-point arranged for switching, per station                    MRC         Yes          No     
OK      GTE                        Two-point arranged for switching, per station                    NRC         Yes          No     
OK      GTE                        Multi-point channel, per station                                 MRC         Yes          No     
OK      GTE                        Multi-point channel, per station                                 NRC         Yes          No     
                                Type C2                                                                                             
OK      GTE                        Two-point not arranged for switching, per station                MRC         Yes          No     
OK      GTE                        Two-point not arranged for switching, per station                NRC         Yes          No     
OK      GTE                        Two-point arranged for switching, per station                    MRC         Yes          No     
OK      GTE                        Two-point arranged for switching, per station                    NRC         Yes          No     
OK      GTE                        Multi-point channel, per station                                 MRC         Yes          No     
OK      GTE                        Multi-point channel, per station                                 NRC         Yes          No     
                  2             Type C4                                                                                             
OK      GTE                        Two-point channel, per channel                                   MRC         Yes          No     
OK      GTE                        Two-point channel, per channel                                   NRC         Yes          No     
OK      GTE                        Three or four-point channel, per station                         MRC         Yes          No     
OK      GTE                        Three or four-point channel, per station                         NRC         Yes          No     
                                Type C5                                                                                             
OK      GTE                        On a two-point channel not arr. for switch., per sta.            MRC         Yes          No     
OK      GTE                        On a two-point channel not arr. for switch., per sta.            NRC         Yes          No     
                                 Type D1                                                                                            
OK      GTE                        Two-point channel not arr. for switching, per channel            MRC         Yes          No     
OK      GTE                        Two-point channel not arr. for switching, per channel            NRC         Yes          No     
</TABLE>

<TABLE>
<CAPTION>
                                                                                                  RETAIL       AVOIDED      RESALE  
 ST      CO     SEC                 SERVICE DESCRIPTION                                            RATE          COST        RATE
 --      --     ---                 -------------------                                           ------       -------       -----
<S>     <C>     <C>       <C>                                                                    <C>          <C>          <C>
OK      GTE                     Type 428                                                          $12.95         N/A        $12.95
OK      GTE                     Type 435                                                            5.70         N/A        $12.95 
OK      GTE       2          Bridging Charge, (multi point service), per bridged channel           $5.70         N/A         $5.70
                             Channel Conditioning                                        
                                Type C1                                                  
OK      GTE                        Two-point not arranged for switching, per station               $6.90         N/A         $6.90
OK      GTE                        Two-point not arranged for switching, per station              $75.00         N/A        $75.00
OK      GTE                        Two-point arranged for switching, per station                  $12.40         N/A        $12.40
OK      GTE                        Two-point arranged for switching, per station                  $75.00         N/A        $75.00
OK      GTE                        Multi-point channel, per station                                $6.90         N/A         $6.90
OK      GTE                        Multi-point channel, per station                               $75.00         N/A        $75.00
                                Type C2                                                  
OK      GTE                        Two-point not arranged for switching, per station              $27.60         N/A        $27.60
OK      GTE                        Two-point not arranged for switching, per station              $75.00         N/A        $75.00
OK      GTE                        Two-point arranged for switching, per station                  $41.40         N/A        $41.40
OK      GTE                        Two-point arranged for switching, per station                  $75.00         N/A        $75.00
OK      GTE                        Multi-point channel, per station                               $20.70         N/A        $20.70
OK      GTE                        Multi-point channel, per station                               $75.00         N/A        $75.00
                  2             Type C4                                                  
OK      GTE                        Two-point channel, per channel                                 $96.60         N/A        $96.60
OK      GTE                        Two-point channel, per channel                                $150.00         N/A       $150.00
OK      GTE                        Three or four-point channel, per station                       $62.10         N/A        $62.10
OK      GTE                        Three or four-point channel, per station                       $75.00         N/A        $75.00
                                Type C5                                                  
OK      GTE                        On a two-point channel not arr. for switch., per sta.          $69.00         N/A        $69.00
OK      GTE                        On a two-point channel not arr. for switch., per sta.          $75.00         N/A        $75.00
                                 Type D1                                                 
OK      GTE                        Two-point channel not arr. for switching, per channel          $16.55         N/A        $16.55
OK      GTE                        Two-point channel not arr. for switching, per channel         $150.00         N/A       $150.00
</TABLE>

                                   PAGE 24
<PAGE>   121


                  GTE TELEPHONE OPERATIONS HEADQUARTERS
                 RESALE PRODUCTS & SERVICES - STATE OF OKLAHOMA
                          GTESW EXCHANGE NETWORK TARIFF
<TABLE>
<CAPTION>
                                                                                                 BILLING     RESALE      DISCOUNT  
 ST      CO     SEC                 SERVICE DESCRIPTION                                            TYPE      POSITION     POSITION 
 --      --     ---                 -------------------                                            ----      --------     -------- 
                      GTESW OKLAHOMA STATE ACCESS TARIFF                                                                        
<S>     <C>     <C>       <C>                                                                  <C>          <C>          <C>    
OK      GTE       5       Design Change Charge per ASR/Per Occurrance                               NRC         Yes          No 
OK      GTE               Special Transport, per airline mile                                       MRC         Yes          No 
OK      GTE               Special Access Line - Two-Wire                                            NRC         Yes          No 
OK      GTE               Special Access Line - Two-Wire                                            MRC         Yes          No 
OK      GTE               Special Access Line - Four-Wire                                           NRC         Yes          No 
OK      GTE               Special Access Line - Four-Wire                                           MRC         Yes          No 
                          Supplemental Features, Per Port                                                                      
OK      GTE                  Multi-point Data Bridging                                              MRC         Yes          No 
OK      GTE                  Voice Conference Bridging                                              MRC         Yes          No 
OK      GTE                  Alarm Distributing Bridging - Common Equipment                         MRC         Yes          No 
OK      GTE                  Alarm Distributing Bridging - Per Two-Wire Port                        MRC         Yes          No 
OK      GTE                  Conditioning Arrangements - Data Type C                                MRC         Yes          No 
OK      GTE                  Conditioning Arrangements - Data Type DA                               MRC         Yes          No 
OK      GTE                  Conditioning Arrangements - Data Type C - Improved                     MRC         Yes          No 
OK      GTE                  Signaling Arrangement/per SAL-Loop Signaling Range Extension           MRC         Yes          No 
OK      GTE                  Signaling Arrangement/per SAL-Loop or E&M to SF                        MRC         Yes          No 
OK      GTE                  Signaling Arrangement/per SAL-E&M to DX                                MRC         Yes          No 
OK      GTE                  Signaling Arrangement/per SAL-E&M to Loop                              MRC         Yes          No 
OK      GTE                  Signaling Arrangement/per SAL-Loop or E&M to PCM                       MRC         Yes          No 
OK      GTE                  Signaling Arrangement/per SAL-Automatic Ringdown                       MRC         Yes          No 
OK      GTE                  Signaling Arrang/per SAL-Echo Control-Echo Suppression/per CKT         MRC         Yes          No 
OK      GTE                  Signaling Arrang/per SAL-Echo Control-Echo Canceller/per CKT           MRC         Yes          No 
OK      GTE                  Impoved Return Loss/per SAL                                            MRC         Yes          No 
OK      GTE                  Impoved Termination Option/per SAL                                     MRC         Yes          No 
OK      GTE                  Impoved Equal Level Echo Path Loss/per SAL                             MRC         Yes          No 
OK      GTE                  Voicebank Facility Switching Arrangement                               MRC         Yes          No 
</TABLE>




<TABLE>
<CAPTION>
                                                                                                 RETAIL       AVOIDED      RESALE  
 ST      CO     SEC                 SERVICE DESCRIPTION                                           RATE         COST        RATE
 --      --     ---                 -------------------                                          ------       -------      -----
                                                                                          
                      GTESW OKLAHOMA STATE ACCESS TARIFF                                  
<S>     <C>     <C>       <C>                                                                   <C>          <C>           <C>
OK      GTE       5       Design Change Charge per ASR/Per Occurrance                             $38.18         N/A        $38.18
OK      GTE               Special Transport, per airline mile                                      $4.50         N/A         $4.50
OK      GTE               Special Access Line - Two-Wire                                         $200.00         N/A       $200.00
OK      GTE               Special Access Line - Two-Wire                                          $30.00         N/A        $30.00
OK      GTE               Special Access Line - Four-Wire                                        $200.00         N/A       $200.00
OK      GTE               Special Access Line - Four-Wire                                         $48.00         N/A        $48.00
                          Supplemental Features, Per Port                                
OK      GTE                  Multi-point Data Bridging                                             $9.73         N/A         $9.73
OK      GTE                  Voice Conference Bridging                                            $10.05         N/A        $10.05
OK      GTE                  Alarm Distributing Bridging - Common Equipment                       $30.00         N/A        $30.00
OK      GTE                  Alarm Distributing Bridging - Per Two-Wire Port                       $4.42         N/A         $4.42
OK      GTE                  Conditioning Arrangements - Data Type C                               $3.15         N/A         $3.15
OK      GTE                  Conditioning Arrangements - Data Type DA                              $2.99         N/A         $2.99
OK      GTE                  Conditioning Arrangements - Data Type C - Improved                   $30.00         N/A        $30.00
OK      GTE                  Signaling Arrangement/per SAL-Loop Signaling Range Extension         $10.00         N/A        $10.00
OK      GTE                  Signaling Arrangement/per SAL-Loop or E&M to SF                      $16.00         N/A        $16.00
OK      GTE                  Signaling Arrangement/per SAL-E&M to DX                              $14.00         N/A        $14.00
OK      GTE                  Signaling Arrangement/per SAL-E&M to Loop                            $12.00         N/A        $12.00
OK      GTE                  Signaling Arrangement/per SAL-Loop or E&M to PCM                     $10.54         N/A        $10.54
OK      GTE                  Signaling Arrangement/per SAL-Automatic Ringdown                     $10.00         N/A        $10.00
OK      GTE                  Signaling Arrang/per SAL-Echo Control-Echo Suppression/per CK        $30.00         N/A        $30.00
OK      GTE                  Signaling Arrang/per SAL-Echo Control-Echo Canceller/per CKT         $85.00         N/A        $85.00
OK      GTE                  Impoved Return Loss/per SAL                                           $3.75         N/A         $3.75
OK      GTE                  Impoved Termination Option/per SAL                                   $10.00         N/A        $10.00
OK      GTE                  Impoved Equal Level Echo Path Loss/per SAL                            $3.75         N/A         $3.75
OK      GTE                  Voicebank Facility Switching Arrangement                             $11.02         N/A        $11.02
</TABLE>    

                                   PAGE 25
<PAGE>   122


                   GTE TELEPHONE OPERATIONS HEADQUARTERS
                 RESALE PRODUCTS & SERVICES - STATE OF OKLAHOMA
                          GTESW EXCHANGE NETWORK TARIFF

<TABLE>
<CAPTION>
                                                                                                 BILLING      RESALE     DISCOUNT
 ST      CO     SEC                 SERVICE DESCRIPTION                                            TYPE       POSITION   POSITION
 --      --     ---                 -------------------                                            ----       --------   --------
<S>     <C>     <C>     <C>                                                                    <C>          <C>          <C>
OK         GTE            PA (200-3500 Hz)-Special Transport per ALM                                MRC          Yes         No   
OK         GTE            PA (200-3500 Hz)-Special Transport per ALM                               DAILY         Yes         No   
OK         GTE            PA (200-3500 Hz)-Special Access Line                                      NRC          Yes         No   
OK         GTE            PA (200-3500 Hz)-Special Access Line                                      MRC          Yes         No   
OK         GTE            PA (200-3500 Hz)-Special Access Line                                     DAILY         Yes         No   
OK         GTE            PA (100-5000 Hz)-Special Transport per ALM                                MRC          Yes         No   
OK         GTE            PA (100-5000 Hz)-Special Transport per ALM                               DAILY         Yes         No   
OK         GTE            PA (100-5000 Hz)-Special Access Line                                      NRC          Yes         No   
OK         GTE            PA (100-5000 Hz)-Special Access Line                                      MRC          Yes         No   
OK         GTE            PA (100-5000 Hz)-Special Access Line                                     DAILY         Yes         No   
OK         GTE            PA (50-8000 Hz)-Special Transport per ALM                                 MRC          Yes         No   
OK         GTE            PA (50-8000 Hz)-Special Transport per ALM                                DAILY         Yes         No   
OK         GTE            PA (50-8000 Hz)-Special Access Line                                       NRC          Yes         No   
OK         GTE            PA (50-8000 Hz)-Special Access Line                                       MRC          Yes         No   
OK         GTE            PA (50-8000 Hz)-Special Access Line                                      DAILY         Yes         No   
OK         GTE            PA (50-15000 Hz)-Special Transport per ALM                                MRC          Yes         No   
OK         GTE            PA (50-15000 Hz)-Special Transport per ALM                               DAILY         Yes         No   
OK         GTE            PA (50-15000 Hz)-Special Access Line                                      NRC          Yes         No   
OK         GTE            PA (50-15000 Hz)-Special Access Line                                      MRC          Yes         No   
OK         GTE            PA (50-15000 Hz)-Special Access Line                                     DAILY         Yes         No   
OK         GTE            PA (50-15000 Hz)-Conditioning Program Audio, Stereo Conditioning          MRC          Yes         No   
OK         GTE            PA (50-15000 Hz)-Conditioning Program Audio, Stereo Conditioning         DAILY         Yes         No   
OK         GTE            PA (All Bandwidths)-Program Audio Bridging per port                       MRC          Yes         No   
OK         GTE            PA (All Bandwidths)-Program Audio Bridging per port                      DAILY         Yes         No   
OK         GTE            PA (All Bandwidths)-Conditioning Program Audio Zero Loss per SAL          MRC          Yes         No   
OK         GTE            PA (All Bandwidths)-Conditioning Program Audio Zero Loss per SAL         DAILY         Yes         No   
OK         GTE            DDS(2.4, 4.8, 9.6, 19.2, 56, 64 Kbps) Special Transport Per ALM           MRC          Yes         No   
</TABLE>
 








<TABLE>
<CAPTION>
                                                                                                RETAIL       AVOIDED       RESALE
 ST      CO     SEC                 SERVICE DESCRIPTION                                          RATE          COST         RATE
 --      --     ---                 -------------------                                         ------       -------        -----
<S>     <C>    <C>   <C>                                                                   <C>            <C>          <C>    
OK         GTE         PA (200-3500 Hz)-Special Transport per ALM                                $4.70         N/A           $4.70
OK         GTE         PA (200-3500 Hz)-Special Transport per ALM                                $0.47         N/A           $0.47
OK         GTE         PA (200-3500 Hz)-Special Access Line                                    $200.00         N/A         $200.00
OK         GTE         PA (200-3500 Hz)-Special Access Line                                     $30.00         N/A          $30.00
OK         GTE         PA (200-3500 Hz)-Special Access Line                                      $3.00         N/A           $3.00
OK         GTE         PA (100-5000 Hz)-Special Transport per ALM                                $9.00         N/A           $9.00
OK         GTE         PA (100-5000 Hz)-Special Transport per ALM                                $0.90         N/A           $0.90
OK         GTE         PA (100-5000 Hz)-Special Access Line                                    $200.00         N/A         $200.00
OK         GTE         PA (100-5000 Hz)-Special Access Line                                     $41.00         N/A          $41.00
OK         GTE         PA (100-5000 Hz)-Special Access Line                                      $4.10         N/A           $4.10
OK         GTE         PA (50-8000 Hz)-Special Transport per ALM                                $14.45         N/A          $14.45
OK         GTE         PA (50-8000 Hz)-Special Transport per ALM                                 $1.45         N/A           $1.45
OK         GTE         PA (50-8000 Hz)-Special Access Line                                     $200.00         N/A         $200.00
OK         GTE         PA (50-8000 Hz)-Special Access Line                                      $42.00         N/A          $42.00
OK         GTE         PA (50-8000 Hz)-Special Access Line                                       $4.20         N/A           $4.20
OK         GTE         PA (50-15000 Hz)-Special Transport per ALM                               $21.66         N/A          $21.66
OK         GTE         PA (50-15000 Hz)-Special Transport per ALM                                $2.17         N/A           $2.17
OK         GTE         PA (50-15000 Hz)-Special Access Line                                    $200.00         N/A         $200.00
OK         GTE         PA (50-15000 Hz)-Special Access Line                                     $43.00         N/A          $43.00
OK         GTE         PA (50-15000 Hz)-Special Access Line                                      $4.30         N/A           $4.30
OK         GTE         PA (50-15000 Hz)-Conditioning Program Audio, Stereo Conditioning         $15.81         N/A          $15.81
OK         GTE         PA (50-15000 Hz)-Conditioning Program Audio, Stereo Conditioning          $1.58         N/A           $1.58
OK         GTE         PA (All Bandwidths)-Program Audio Bridging per port                      $10.84         N/A          $10.84
OK         GTE         PA (All Bandwidths)-Program Audio Bridging per port                       $1.08         N/A           $1.08
OK         GTE         PA (All Bandwidths)-Conditioning Program Audio Zero Loss per SAL         $15.81         N/A          $15.81
OK         GTE         PA (All Bandwidths)-Conditioning Program Audio Zero Loss per SAL          $1.58         N/A           $1.58
OK         GTE         DDS(2.4, 4.8, 9.6, 19.2, 56, 64 Kbps) Special Transport Per ALM           $4.50         N/A           $4.50
</TABLE>    
 

                                   PAGE 26
<PAGE>   123
                  GTE TELEPHONE OPERATIONS HEADQUARTERS
                 RESALE PRODUCTS & SERVICES - STATE OF OKLAHOMA
                          GTESW EXCHANGE NETWORK TARIFF

<TABLE>
<CAPTION>
                                                                                        BILLING    RESALE      DISCOUNT    RETAIL
 ST     CO    SEC            SERVICE DESCRIPTION                                         TYPE     POSITION     POSITION     RATE   
 --     --    ---            -------------------                                         ----     --------     --------    ------  
<S>     <C>   <C>   <C>                                                                   <C>       <C>           <C>    <C>       
OK      GTE         DDS(2.4, 4.8, 9.6, 19.2 56, 64 Kbps) SAL                              NRC       Yes           No       $250.00  
OK      GTE         DDS(2.4, 4.8, 9.6, 19.2 Kbps) SAL                                     MRC       Yes           No        $68.00  
OK      GTE         DDS(56, 64 Kbps) SAL                                                  MRC       Yes           No        $85.00  
OK      GTE         DDS Bridging (per port)                                               MRC       Yes           No        $11.00  
OK      GTE         DDS Secondary Channel                                                 MRC       Yes           No         $7.00  
OK      GTE         Multiplexing-DS1 to Voice                                             NRC       Yes           No       $800.00  
OK      GTE         Multiplexing-DS1 to Voice                                             MRC       Yes           No       $190.00  
OK      GTE         Multiplexing-DS3 to DS1                                               NRC       Yes           No       $450.00  
OK      GTE         Multiplexing-DS3 to DS1                                               MRC       Yes           No       $490.00  
OK      GTE         Digital Data Carrier Multiplexer                                      NRC       Yes           No     $1,500.00  
OK      GTE         Digital Data Carrier Multiplexer                                      MRC       Yes           No       $550.00  
OK      GTE         Digital Data Carrier Subrate Multiplexer-one DSO to twenty 2.4 Kbps   NRC       Yes           No       $800.00  
OK      GTE         Digital Data Carrier Subrate Multiplexer-one DSO to twenty 2.4 Kbps   MRC       Yes           No       $160.00  
OK      GTE         Digital Data Carrier Subrate Multiplexer-one DSO to ten 4.8 Kbps      NRC       Yes           No       $800.00  
OK      GTE         Digital Data Carrier Subrate Multiplexer-one DSO to ten 4.8 Kbps      MRC       Yes           No       $120.00  
OK      GTE         Digital Data Carrier Subrate Multiplexer-one DSO to Five 9.6 Kbps     NRC       Yes           No       $800.00  
OK      GTE         Digital Data Carrier Subrate Multiplexer-one DSO to Five 9.6 Kbps     MRC       Yes           No       $100.00  
                                                                                                                                    
OK      GTE         DS1 Special Access Line-First System                                  NRC       Yes           No       $254.00  
OK      GTE         DS1 Special Access Line-First System                                  MRC       Yes           No       $254.00  
OK      GTE         DS1 Special Access Line-Each Additional Sysytem                       NRC       Yes           No       $900.00  
OK      GTE         DS1 Special Access Line-Each Additional Sysytem                       MRC       Yes           No       $254.00  
OK      GTE         DS1 Special Access Line-Special Transport Termination                 MRC       Yes           No        $30.00  
OK      GTE         DS1 Special Access Line-Special Transport per ALM                     MRC       Yes           No        $15.00  
OK      GTE         DS1-Automatic Protecting Switching                                    NRC       Yes           No       $700.00  
OK      GTE         DS1-Automatic Protecting Switching                                    MRC       Yes           No       $100.00  
OK      GTE         DS1 OPP "First System" SAL-One Year                                   MRC       Yes           No       $250.00  
OK      GTE         DS1 OPP "First System" SAL-Three Year                                 MRC       Yes           No       $210.00  
OK      GTE         DS1 OPP "First System" SAL-Five Year                                  MRC       Yes           No       $175.00  
                                                                                                                         
                                                                                                                         
<CAPTION>                                                                                        AVOIDED          RESALE
 ST        CO     SEC                 SERVICE DESCRIPTION                                          COST            RATE
 --        --     ---                 -------------------                                        -------          ------
<S>        <C>    <C>   <C>                                                                        <C>          <C>
OK         GTE          DDS(2.4, 4.8, 9.6, 19.2 56, 64 Kbps) SAL                                   N/A            $250.00
OK         GTE          DDS(2.4, 4.8, 9.6, 19.2 Kbps) SAL                                          N/A             $68.00  
OK         GTE          DDS(56, 64 Kbps) SAL                                                       N/A             $85.00  
OK         GTE          DDS Bridging (per port)                                                    N/A             $11.00  
OK         GTE          DDS Secondary Channel                                                      N/A              $7.00  
OK         GTE          Multiplexing-DS1 to Voice                                                  N/A            $800.00  
OK         GTE          Multiplexing-DS1 to Voice                                                  N/A            $190.00  
OK         GTE          Multiplexing-DS3 to DS1                                                    N/A            $450.00  
OK         GTE          Multiplexing-DS3 to DS1                                                    N/A            $490.00  
OK         GTE          Digital Data Carrier Multiplexer                                           N/A          $1,500.00  
OK         GTE          Digital Data Carrier Multiplexer                                           N/A            $550.00  
OK         GTE          Digital Data Carrier Subrate Multiplexer-one DSO to twenty 2.4 Kbps        N/A            $800.00  
OK         GTE          Digital Data Carrier Subrate Multiplexer-one DSO to twenty 2.4 Kbps        N/A            $160.00  
OK         GTE          Digital Data Carrier Subrate Multiplexer-one DSO to ten 4.8 Kbps           N/A            $800.00  
OK         GTE          Digital Data Carrier Subrate Multiplexer-one DSO to ten 4.8 Kbps           N/A            $120.00  
OK         GTE          Digital Data Carrier Subrate Multiplexer-one DSO to Five 9.6 Kbps          N/A            $800.00  
OK         GTE          Digital Data Carrier Subrate Multiplexer-one DSO to Five 9.6 Kbps          N/A            $100.00  
                                                                                                                           
OK         GTE          DS1 Special Access Line-First System                                       N/A            $254.00  
OK         GTE          DS1 Special Access Line-First System                                       N/A            $254.00  
OK         GTE          DS1 Special Access Line-Each Additional Sysytem                            N/A            $900.00  
OK         GTE          DS1 Special Access Line-Each Additional Sysytem                            N/A            $254.00  
OK         GTE          DS1 Special Access Line-Special Transport Termination                      N/A             $30.00  
OK         GTE          DS1 Special Access Line-Special Transport per ALM                          N/A             $15.00  
OK         GTE          DS1-Automatic Protecting Switching                                         N/A            $700.00  
OK         GTE          DS1-Automatic Protecting Switching                                         N/A            $100.00  
OK         GTE          DS1 OPP "First System" SAL-One Year                                        N/A            $250.00  
OK         GTE          DS1 OPP "First System" SAL-Three Year                                      N/A            $210.00  
OK         GTE          DS1 OPP "First System" SAL-Five Year                                       N/A            $175.00  
</TABLE>


                                    PAGE 27
<PAGE>   124
                      GTE TELEPHONE OPERATIONS HEADQUARTERS
                 RESALE PRODUCTS & SERVICES - STATE OF OKLAHOMA
                          GTESW EXCHANGE NETWORK TARIFF
<TABLE>
<CAPTION>
                                                                            BILLING RESALE  DISCOUNT    RETAIL   AVOIDED  RESALE  
ST  CO   SEC         SERVICE DESCRIPTION                                     TYPE  POSITION POSITION    RATE     COST      RATE   
- --  --   ---         -------------------                                     ----  -------- --------    ------   -------  ------  
                                                                                                                                  
<S> <C>     <C>                                                               <C>   <C>       <C>    <C>         <C>     <C>      
OK  GTE     DS3 Electrical Interface SAL - One Year - 3system                 NRC   Yes       No     $2,500.00   N/A     $2,500.00
OK  GTE     DS3 Electrical Interface SAL - One Year - 3 system                MRC   Yes       No     $3,800.00   N/A     $3,800.00
OK  GTE     DS3 Electrical Interface SAL - Three Year - 3 system              NRC   Yes       No     $2,500.00   N/A     $2,500.00
OK  GTE     DS3 Electrical Interface SAL - Three Year - 3 system              MRC   Yes       No     $2,700.00   N/A     $2,700.00
OK  GTE     DS3 Electrical Interface SAL - Five Year - 3 system               NRC   Yes       No     $2,500.00   N/A     $2,500.00
OK  GTE     DS3 Electrical Interface SAL - Five Year - 3 system               MRC   Yes       No     $2,400.00   N/A     $2,400.00
OK  GTE     DS3 Electrical Interface SAL - Seven Year -3 system               NRC   Yes       No     $2,500.00   N/A     $2,500.00
OK  GTE     DS3 Electrical Interface SAL - Seven Year - 3 system              MRC   Yes       No     $2,250.00   N/A     $2,250.00
OK  GTE     DS3 Electrical Interface each add'l SAL - One Year (Max of 2)     NRC   Yes       No       $400.00   N/A       $400.00
OK  GTE     DS3 Electrical Interface each add'l SAL - One Year (Max of 2)     MRC   Yes       No       $500.00   N/A       $500.00
OK  GTE     DS3 Electrical Interface each add'l SAL - Three Year (Max of 2)   NRC   Yes       No       $400.00   N/A       $400.00
OK  GTE     DS3 Electrical Interface each add'l SAL - Three Year (Max of 2)   MRC   Yes       No       $400.00   N/A       $400.00
OK  GTE     DS3 Electrical Interface each add'l SAL - Five Year (Max of 2)    NRC   Yes       No       $400.00   N/A       $400.00
OK  GTE     DS3 Electrical Interface each add'l SAL - Five Year (Max of 2)    MRC   Yes       No       $300.00   N/A       $300.00
OK  GTE     DS3 Electrical Interface each add'l SAL - Seven Year (Max of 2)   NRC   Yes       No       $400.00   N/A       $400.00
OK  GTE     DS3 Electrical Interface each add'l SAL - Seven Year (Max of 2)   MRC   Yes       No       $200.00   N/A       $200.00
OK  GTE     DS3 Electrical Interface each SAL - One Year                      NRC   Yes       No       $900.00   N/A       $900.00
OK  GTE     DS3 Electrical Interface each SAL - One Year                      MRC   Yes       No       $900.00   N/A       $900.00
OK  GTE     DS3 Electrical Interface each SAL - Three Year                    NRC   Yes       No       $900.00   N/A       $900.00
OK  GTE     DS3 Electrical Interface each SAL - Three Year                    MRC   Yes       No       $700.00   N/A       $700.00
OK  GTE     DS3 Electrical Interface each SAL - Five Year                     NRC   Yes       No       $900.00   N/A       $900.00
OK  GTE     DS3 Electrical Interface each SAL - Five Year                     MRC   Yes       No       $650.00   N/A       $650.00
OK  GTE     DS3 Electrical Interface each SAL - Seven Year                    NRC   Yes       No       $900.00   N/A       $900.00
OK  GTE     DS3 Electrical Interface each SAL - Seven Year                    MRC   Yes       No       $610.00   N/A       $610.00
OK  GTE     DS3 Electrical Interface SAL - Spec Trans Term - 3 system         MRC   Yes       No       $300.00   N/A       $300.00
OK  GTE     DS3 Electrical Interface SAL - Spec Trans Fac per ALM - 3 system  MRC   Yes       No        $60.00   N/A        $60.00
OK  GTE     DS3 Electrical Interface SAL - Multiplexer Cross Connect Arrang   MRC   Yes       No        $65.00   N/A        $65.00
OK  GTE     Clear Channel Capability                                          NRC   Yes       No        $90.00   N/A        $90.00
OK  GTE     Clear Channel Capability                                          MRC   Yes       No        $24.00   N/A        $24.00
            
</TABLE>

Footnote: (1)  The retail rates above do not include the End User Subscriber 
               Line Charge (ECSLC) The ALEC will be resp

                                    Page 28
<PAGE>   125
                     GTE TELEPHONE OPERATIONS HEADQUARTERS
                 RESALE PRODUCTS & SERVICES - STATE OF OKLAHOMA
                          GTESW EXCHANGE NETWORK TARIFF

<TABLE>
<CAPTION>
                                                                          BILLING RESALE  DISCOUNT    RETAIL   AVOIDED  RESALE  
ST  CO   SEC         SERVICE DESCRIPTION                                   TYPE  POSITION POSITION    RATE     COST      RATE
- --  --   ---         -------------------                                   ----  -------- --------    ------   -------  ------
<S> <C>     <C>                                                               <C>   <C>       <C>    <C>         <C>     <C>      

</TABLE>

Footnote:   (2)  This document is subject to the terms and conditions of the 
                 nondisclosure agreement between the ALEC and GTE.
Footnote:   (3)  This matrix is subject to Legal and/or Regulatory constraints.
Footnote:   (4)  Prices contained in this price list have been calculated 
                 according to the formula:  (1) retail price, less (2) avoided 
                 retail costs.
Footnote:   (5)  Resale with discount to Business Customers only.  No Resale 
                 and No Discount to Residential Customers










                                    Page 29
<PAGE>   126



                                   APPENDIX G
                          PRICES FOR UNBUNDLED ELEMENTS


General. The rates contained in this Appendix G are the rates as defined in
Article VII and are subject to change resulting from future Commission or other
proceedings, including but not limited to any generic proceeding to determine
GTE's unrecovered costs (e.g., historic costs, contribution, undepreciated
reserve deficiency, or similar unrecovered GTE costs (including GTE's interim
Service Support Surcharge)), the establishment of a competitively neutral
universal service system, or any appeal or other litigation.

<TABLE>
<S>     <C>                                                                            <C>
(1)      Local Loops
         Local Loop
                  2 Wire Loop                                                           $   34.00
                  4 Wire Loop                                                           $   54.00
         Network Interface Device
                  Basic NID                                                             $    1.60
                  12x NID                                                               $    2.30

(2)      Local Switching (Must purchase Port)
         Ports
                  2 Wire Basic Port                                                     $    6.20
                  DS-1 Port                                                             $   71.00

         Local Switching
                  Originating MOU                                                       $ 0.0056564
                  Terminating MOU                                                       $ 0.0056564

         Intrastate End Office Switching
                  Originating MOU                                                       $ 0.0056564
                  Terminating MOU                                                       $ 0.0056564
                  Interconnection Charge                                                $ 0.0100320
                  CCL
                    -Originating                                                        $ 0.0122000
                    -Terminating                                                        $ 0.0122000

         Interstate End Office Switching
                  Originating MOU                                                       $ 0.0056564
                  Terminating MOU                                                       $ 0.0056564
                  Interconnection Charge                                                $ 0.0037789
                  CCL
                    -Originating                                                        $ 0.0100000
                    -Terminating                                                        $ 0.0215610

(3)      Features                                                                       See Attached

(4)      Dedicated Transmission Links
         Entrance Facility
                  2 Wire Voice                                                          $   34.00
                  4 Wire Voice                                                          $   54.00
                  DS1 Standard 1st System                                               $  275.00
                  DS1 Standard Add'l System                                             $  140.00
                  DS3 Protected, Electrical                                             $1,250.00
                  DS1 to Voice Multiplexing                                             $  195.00

</TABLE>


                                      G-1
<PAGE>   127

<TABLE>
<S>                                                                                   <C>
                  DS3 to Voice Multiplexing                                             $ 350.00

         Direct Trunked Transport
                  Voice Facility Per ALM                                                $   4.44
                  DS1 Facility Per ALM                                                  $   4.75
                  DS1 Per Termination                                                   $  30.00
                  DS3 Facility Per ALM                                                  $  25.00
                  DS3 Per Termination                                                   $ 300.00

(5)      Common/Shared Transmission Links
         Transport Termination MOU/Term                                                 $ 0.0001333
         Transport Facility MOU/Mile                                                    $ 0.0000106

(6)      Tandem Switching MOU                                                           $ 0.0006351

(7)      Databases and Signaling Systems
         Signaling Links and STP
                  56 Kbps Links                                                         $  78.98
                  DS-1 Link                                                             $  90.78
                  Signal Transfer Point (STP) Port Term                                 $ 178.90
         Call Related Databases
                  Line Information Database (ABS-Queries)                               $ 0.035
                  Toll Free Calling Database Transport (ABS-Queries)                    $ 0.0046
                  Toll Free Calling Database (DB800 Queries)                            $ 0.0086010

Non-Recurring Charges for Unbundled Services

Service Ordering (loop or port)
         Initial Service Order, per order                                               $  47.25
         Transfer of Service Charges, per order                                         $  16.00
         Subsequent Service Order, per order                                            $  24.00
         Customer Service Record Research, per request                                  $   5.25

Installation
         Unbundled Loop, per loop                                                       $  11.75
         Unbundled Port, per port                                                       $  11.75

Loop Facility Charge, per order                                                         $ 68.25 
         This charge will apply when field
         work is required for establishment of new unbundled loop service.

Monthly Recurring Charge for EIS
         DS0 Level Connection                                                           $   2.21
         DS1 Level Connection                                                           $   5.30

</TABLE>


                                      G-2
<PAGE>   128


                                OKLAHOMA FEATURES

<TABLE>
<CAPTION>

FEATURE NAME:                                                              GTE PROPOSED RATE:
- -------------                                                              ------------------
<S>      <C>                                                                        <C>
1.       Speed Call 8 (Changeable)                                                  $ 0.25
2.       Speed Call 30 (Changeable)                                                 $ 0.25
3.       Cancel Call Waiting                                                        $ 0.25
4.       Call Forward Variable                                                      $ 0.25
5.       Call Waiting                                                               $ 0.25
6.       Dual Tone Multifrequency (DTMF)                                            $ 0.25
7.       Three-Way Calling                                                          $ 0.75
8.       Account Codes For AFR                                                      $ 0.25
9.       Add On - Consultation Hold - Incoming Only                                 $ 0.25
10       Attendant BL Verification                                                  $ 0.75
11.      Attendant camp-on (NonDL Console)                                          $ 0.25
12.      Attendant Conference                                                       $ 5.00
13.      Authorization Codes for AFR                                                $ 0.50
14.      Basic Business Group                                                       $ 1.50
15.      Dual Tone Multifrequency (DTMF)                                            $ 0.25
16.      Station-to-Station Dialing (Intercom)                                      $ 2.75
17.      Business Group Automatic Callback (BGAC)                                   $ 0.25
18.      Call Forwarding Variable                                                   $ 0.25
19.      Business Group - Speed Call - 8                                            $ 0.25
20.      Business Group - Speed Call - 30                                           $ 0.25
21.      Business Group - Three Way Calling (TWC)                                   $ 0.75
22.      Code Calling                                                               $ 0.25
23.      Call Forward Busy Line                                                     $ 0.25
24.      Call Forward Don't Answer                                                  $ 0.25
25.      Call Forward Fixed                                                         $ 0.25
26.      Call Forwarding - Incoming Only                                            $ 0.25
27.      Call Flip/Flop                                                             $ 0.25
28.      Call Forwarding - Withing Group                                            $ 0.25
29.      Call Hold                                                                  $ 0.25
30.      Circular Hunting                                                           $ 0.25
31.      Call Park                                                                  $ 0.25
32.      Call Pick-Up                                                               $ 0.25
33.      Code Restrictions and Diversion                                            $ 2.00
34.      Call Transfer Individual - All Calls                                       $ 0.25
35.      Call Waiting Originating                                                   $ 0.25
36.      Call Waiting Terminating                                                   $ 0.25
37.      Direct Connect                                                             $ 0.25
38.      Directed Call Pickup W/BI                                                  $ 0.25
39.      Directed Call Pickup WO/BI                                                 $ 0.25
40.      Dial Call Waiting                                                          $ 0.25
</TABLE>


                                      G-3
<PAGE>   129


                                OKLAHOMA FEATURES

<TABLE>
<CAPTION>

FEATURE NAME:                                                              GTE PROPOSED RATE:
- -------------                                                              ------------------
<S>     <C>                                                                     <C>
41.      Remote Access to (Business Group) Features                              $  0.25
42.      Distinctve Ringing                                                      $  0.25
43.      Executive Busy Override                                                 $  0.25
44.      Fixed Night Service - Call Fwd                                          $  0.25
45.      Fixed Night Service - Key                                               $  0.25
46.      Fully Restricted (Orig/Term)                                            $  0.50
47.      Facility Restriction Level                                              $  2.00
48.      Foreign Exchange Facilities                                             $  0.25
49.      Last Number Redial                                                      $  0.25
50.      Loud Speaker Paging                                                     $  0.25
51.      Make Busy Key                                                           $  1.25
52.      Off-Hook Queuing                                                        $  0.25
53.      On-Hook Queuing                                                         $  0.25
54.      Preferential Multiline Hunting                                          $  0.25
55.      Recorded Telephone Dictation                                            $  0.25
56.      Speed Calling Individual 1 Digit                                        $  0.25
57.      Speed Calling Individual 2 Digit                                        $  0.25
58.      Stop Hunt Key                                                           $  1.25
59.      Special Intercept Announcements                                         $  0.50
60.      Station Restricted (Orig/Term)                                          $  0.50
61.      Time of Day Routing Control                                             $  0.50
62.      Toll Restricted Service                                                 $  2.00
63.      Two-way Splitting                                                       $  0.25
64.      Uniform Call Distribution (UCD) Hunting                                 $  0.25
65.      Auto Alt Rt                                                             $  1.25
66.      Auto Rt Sel                                                             $  0.75
67.      Meet Me Conf                                                            $ 62.00
68.      Auto Call Back                                                          $  0.25
69.      Anon Call Rej                                                           $  0.25
70.      Auto Recall                                                             $  0.25
71.      Call Num Deliver                                                        $  0.25
72.      Call Num DeliverBlk                                                     $  0.25
73.      Cust Ord Trace                                                          $  0.25
74.      Dist Ring/VIP                                                           $  0.25
75.      Select Call Accept                                                      $  0.25
76.      Select Call Frwd                                                        $  0.25
77.      Select Call Reject                                                      $  0.25
78.      Select Call Wait                                                        $  0.25
         ----------------                                                        -------
         TOTAL                                                                   $101.25

</TABLE>


                                      G-4
<PAGE>   130




                                   APPENDIX H
                   RATES AND CHARGES FOR 911/E911 ARRANGEMENTS

The following services are offered by GTE for purchase by DTI, where an
individual item is not superseded by a tariffed offering.

<TABLE>
<CAPTION>

                                                                                      NRC            MRC
                                                                                      ---            ---
<S>    <C>                                                                          <C>             <C>
1.     9-1-1 Selective Router Map                                                   $125.00            n/a
       Provided is a color map showing a selective router's
       location and the GTE central offices that send their 9-1-1
       call to it.  The selective router and central office information
       will include CLLI codes and NPA/NXXs served.  The map
       will include boundaries of each central office and show major
       streets and the county boundary.  Permission to reproduce
       within DTI for its internal use is granted without further fee.
       Non-tariffed price.

2.     9-1-1 Selective Router Pro-Rata Fee/trunk                                       $0           $100.77
       This fee covers the cost of selective routing switch capacity
       per trunk to cover investment to handle the additional capacity
       without going to the 9-1-1 districts for additional funding.

3.     PS ALI Software                                                              $790.80
       a personal computer software program running on Windows
       3.1(TM)for formatting subscriber records into NENA Verison #2
       format to create files for uploading to GTE's ALI Gateway.
       Fee includes software, warranty and 1 800 872-3356 support
       at no additional cost.

4.     ALI Gateway Service                                                          $135.00         $36.12
       Interface for delivery of ALI records to GTE's Data Base
       Management System.  This provides a computer access port for
       DTI to transmit daily subscriber record updates to GTE for
       loading into ALI databases.  It includes support at
       1 800 872-3356 at no additional cost.

5.     9-1-1 Interoffice Trunk                                                      Tariff          Tariff
       This is a tariffed offering, to be found in each state's
       Emergency Number Service Tariff.

6.     ALI Database                                                                 Tariff          Tariff
       This is a tariffed offering, to be found in each state's
       Emergency Number Service Tariff.

7.     Selective Router Database per Record Charge                                  Tariff          Tariff 
       Fee for each ALI record used in a GTE selective router.                      
       This is a tariffed offering, to be found in each state's 
       Emergency Number Service Tariff.

</TABLE>


                                       H-1
<PAGE>   131


<TABLE>
<CAPTION>

                                                                                      NRC            MRC
                                                                                      ---            ---
<S>   <C>                                                                           <C>             <C>
8.     MSAG Copy 
       Production of one copy of a 9-1-1 Customer's Master Street Address Guide,
       postage paid.
       a.    Copy provided in paper format                                           $238.50         $54.00
       b.    Copy provided in flat ASCII file on a 3 1/2" diskette                   $276.00         $36.00


</TABLE>









                                      H-2

<PAGE>   132



                                   APPENDIX I
             SERVICE ORDERING, PROVISIONING, BILLING AND MAINTENANCE


1.       Service Ordering, Provisioning, and Billing Systems Generally. The
         following describes generally the operations support systems that GTE
         will use and the related functions that are available for ordering,
         provisioning and billing for resold services, interconnection
         facilities and services and unbundled network elements. Except as
         specifically provided otherwise in this Agreement, service ordering,
         provisioning, billing and maintenance shall be governed by the GTE
         Guide. Before orders can be taken, DTI will provide GTE with its
         Operating Company Number ("OCN") and Company Code ("CC") as follows:

         (a)      The ALEC must provide their OCN (four-digit alpha-numeric
                  assigned by Bellcore or number administrator) on the ALEC
                  Profile. The GTE Guide provides the necessary information for
                  the ALEC to contact Bellcore to obtain the OCN. There are no
                  optional fields on the Profile.

         (b)      Before the Local Service Request ("LSR") and Directory Service
                  Request ("DSR") order forms can be processed DTI must provide
                  the OCN and Customer Carrier Name Abbreviation ("CCNA").

1.1      Operations Support Systems for Trunk-Side Interconnection

         1.1.1             DTI will be able to order trunk-side interconnector
                           services and facilities from GTE through a direct
                           electronic interface over the GTE Network Data Mover
                           ("NDM") in a nondiscriminatory manner. Orders for
                           trunk-side interconnection will be initiated by an
                           Access Service Request ("ASR") sent electronically by
                           DTI over the NDM. ASRs for trunk-side interconnection
                           will be entered electronically into GTE's Carrier
                           Access Management System ("CAMS") to validate the
                           request, identify any errors, and resolve any errors
                           back to DTI. CAMS is a family of GTE systems
                           comprised primarily of EXACT/TUF, SOG/SOP, and CABS.

         1.1.2             The use of CAMS to support DTI's requests for
                           trunk-side interconnection will operate in the
                           following manner: GTE will route the ASR through its
                           data center to one of two National Access Ordering
                           Centers ("NACC"). The ASR will be entered
                           electronically into the EXACT/TUF system for
                           validation and correction of errors. Errors will be
                           referred back to DTI. DTI then will correct any
                           errors that GTE has identified and resubmit the
                           request to GTE electronically through a supplemental
                           ASR, without penalty or charge (e.g., order
                           modification charge) to DTI. Similarly, errors
                           committed by GTE subsequent to the receipt of a valid
                           ASR from DTI will be expeditiously identified and
                           corrected by GTE without the need for DTI's
                           submission of a supplemental ASR. GTE then will
                           translate the ASR into a service order for
                           provisioning and billing. In order to convert the ASR
                           into a service order, GTE personnel must apply the
                           necessary elements to provision the service and
                           include the billable elements necessary for GTE to
                           bill DTI for the services provided. This application
                           also requires a determination of the access tandem to
                           end office relationships with the service requested.

         1.1.3             At the next system level, translated service orders
                           will be distributed electronically through the
                           SOG/SOP systems to several destinations. The SOG/SOP
                           system will begin the actual provisioning of the
                           service for DTI. Other GTE provisioning systems are
                           CNAS and ACES. The GTE Database Administrative Group
                           ("DBA")



                                       I-1
<PAGE>   133

                           and the Special Services Control Center ("SSCC") will
                           be the two most important destinations at this level.
                           The DBA location will identify codes for the
                           appropriate GTE switch in order to provide the
                           functions required by the ASR. The SSCC will provide
                           the engineering for the facilities over which the
                           services will be handled. Information from these two
                           groups (and others) then will be transmitted
                           electronically to GTE's field service personnel
                           (Customer Zone Technicians or "CZTs") who will
                           establish the trunks and facilities, thus connecting
                           the GTE facilities to a connecting company, if one is
                           required, and to DTI. GTE's CZTs also will contact
                           DTI directly to perform testing, and upon acceptance
                           by DTI, will make the necessary entries into the GTE
                           system to complete the order. The completed orders
                           then will pass to GTE's Carrier Access Billing System
                           ("CABS") which will generate the bill to DTI. The
                           billing process under CABS requires coordination with
                           several other systems.

         1.1.4             Billing for transport and termination services cannot
                           be accomplished without call records from GTE's
                           central office switches. Records of usage will be
                           generated at GTE's end office switches or the access
                           tandems. Call usage records will be transmitted
                           electronically from GTE's switches through GTE's
                           Billing Intermediate Processor ("BIP"). This system
                           will collect the call records, perform limited
                           manipulations to the record and transfer them to a
                           centralized data center where they will be processed
                           through the Universal Measurement System ("UMS") to
                           determine the validity and accuracy of the records.
                           UMS also will sort the records and send them to the
                           CABS billing system, from which GTE will produce a
                           bill and send it to DTI.

1.2      Operations Support Systems for Resold Services and Unbundled Elements

         1.2.1             DTI will also be able to order services for resale
                           and unbundled network elements, as well as interim
                           number portability, directly from GTE through an
                           electronic interface. To initiate an order for these
                           services or elements, DTI will submit a Local Service
                           Request ("LSR") from its data center to GTE's Data
                           Center using the same electronic NDM interface used
                           for trunk-side interconnection. If no NDM interface
                           exists or if DTI chooses to establish a separate NDM
                           interface, DTI must request an NDM facility. For new
                           entrants that elect not to interface electronically,
                           GTE will accommodate submission of LSR orders by
                           facsimile, E-mail, Internet or a dial NDM
                           arrangement. An LSR is very similar to an ASR, except
                           that it will be used exclusively for line-side
                           interconnection requests. GTE will transfer LSRs to
                           GTE's NOMC centralized service order processing
                           center electronically.

         1.2.2             Most LSRs will be used either to transfer an existing
                           GTE customer to DTI or to request service for a new
                           customer who is not an existing GTE customer.
                           Depending on the situation, different information
                           will be required on the LSR. LSRs for a conversion of
                           a GTE local customer to DTI must include information
                           relating to all existing, new and disconnected
                           services for that customer, including the customer's
                           name, type of service desired, location of service
                           and features or options the customer desires. DTI
                           will be able to obtain this customer information
                           after GTE has received the customer's written consent
                           as specified in Article VI.3.3. For service to a new
                           customer who is not an existing GTE customer, the LSR
                           must contain the customer's name, service address,
                           service type, services, options, features and ALEC
                           data. If known, the LSR should include the telephone
                           number and due date/desired due date.


                                      I-2
<PAGE>   134

         1.2.3             While DTI would have its own customer information and
                           may have the SAG/GTE products on tape from GTE, DTI
                           would not have the due date or new telephone number
                           for new customers since that information is contained
                           in GTE's systems. Therefore, a process is required to
                           provide this information to DTI. GTE itself does not
                           have uniform access to this information
                           electronically. Until GTE and DTI have agreed and
                           established electronic interfaces, DTI agrees that an
                           800 number is the method that will be used. The 800
                           telephone number will connect DTI directly to GTE's
                           NOMC service representatives. When DTI receives a
                           request for basic services from a new local service
                           customer, DTI will call GTE's NOMC through the 800
                           number, and, while the new customer is on hold, GTE
                           will provide the due date for service and the new
                           telephone number for that customer. At the same time,
                           DTI will give GTE the new customer's name, service
                           address and type of requested service (i.e., R1, B1).
                           GTE will enter that information into its SORCES or
                           SOLAR service ordering systems to be held in suspense
                           until DTI sends the confirming LSR. DTI will then
                           return to its customer holding on the line and
                           provide the due date and new telephone number.

         1.2.4             After concluding the telephone call with the new
                           customer, DTI will complete a confirming LSR for the
                           new service and send it electronically to GTE's data
                           center for processing. Upon receipt, GTE will match
                           the LSR with the service order suspended in GTE's
                           system, and if there is a match, GTE will process the
                           LSR. After the LSR is processed, GTE will transmit
                           confirmation electronically to DTI through the NDM
                           that the LSR has been processed, providing a record
                           of the telephone number and due date. DTI will be
                           required to submit the confirming LSR by 12:00 p.m.
                           each day local time, as defined by the location of
                           the service address. If DTI fails to submit the LSR
                           in a timely manner, the suspended LSR will be
                           considered in jeopardy, at which time GTE will assign
                           a new due date upon receipt of the delayed LSR for
                           such customer requests and notify DTI of the change.

         1.2.5             Number assignments and due date schedules for
                           services other than single line service and hunt
                           groups up to 12 lines will be assigned within
                           approximately twenty-four (24) hours after GTE's
                           receipt of the LSR using the standard Local
                           Confirmation ("LSC") report sent electronically to
                           DTI over the NDM, thereby providing a record of the
                           newly established due date. An exception would be a
                           multi-line hunt group for 12 lines or fewer. The
                           other numbers then will be provided through the
                           normal electronic confirmation process.

         1.2.6             The processing of specifically requested telephone
                           numbers (called "vanity numbers") is as follows. GTE
                           will work with DTI on a real time interface to
                           process vanity numbers while DTI's customer is still
                           on the line. If a number solution can be established
                           expeditiously, it will be done while the customer is
                           still on the line. If extensive time will be required
                           to find a solution, GTE service representatives will
                           work with DTI representatives off line as GTE would
                           for its own customers. For all of this, the basic
                           tariff guidelines for providing telephone numbers
                           will be followed.

         1.2.7             Once the order for line-side interconnection service
                           is established, it is moved for provisioning to the
                           next system level. Here, GTE will validate and
                           process the LSR to establish an account for DTI and,
                           if GTE continues to provide some residual services to
                           the customer, GTE will maintain a GTE account. In
                           GTE's system, GTE's account is called the Residual
                           Account and DTI's account is referred to as DTI
                           Account. If any engineering for the service is
                           necessary, the account would be distributed to the
                           SSCC. Otherwise, it will be distributed for facility
                           assignment.


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         1.2.8             With the account established and any engineering and
                           facility assignment complete, GTE then will transmit
                           electronically a record to GTE's CZT field personnel
                           if physical interconnection or similar activity is
                           required. The CZTs will provision the service and
                           then electronically confirm such provision in the
                           SOLAR/SORCES system when completed. The accounts then
                           will be transmitted to GTE's Customer Billing
                           Services System ("CBSS"). GTE shall provide to DTI a
                           service completion report. Call records for actual
                           service provided to DTI's customers on GTE facilities
                           will be transmitted from GTE's switches through some
                           usage rating systems (BIP, UMS), screened and
                           eventually delivered to CBSS for the generation of
                           bills.

         1.2.9             CBSS is a different system than CABS, and it is the
                           one that GTE will utilize to produce the required
                           bills for resold services, unbundled elements and
                           local number portability. CBSS will create a bill to
                           DTI for resold services and unbundled elements along
                           with a summary bill master. Daily unrated records for
                           intraLATA toll usage and local usage (in collect
                           usage data will be provided on rated basis) on DTI's
                           accounts will be generated and transmitted
                           electronically to DTI.

         1.2.10            On resold accounts, GTE will provide usage in EMR
                           format per existing file exchange schedules. The
                           usage billing will be in agreed upon level of detail
                           for DTI to issue a bill to its end users.

         1.2.11            GTE will provide DTI with detailed monthly billing
                           information in a paper format until an agreed upon
                           Electronic Data Interchange 811 electronic bill
                           format is operational.

         1.2.12            State or sub-state level billing will include up to
                           ten (10) summary bill accounts.

         1.2.13            GTE accepts DTI's control reports and agrees to
                           utilize industry standard return codes for unbillable
                           messages. Transmission will occur via the NDM. Tape
                           data will conform to Attachment "A" of the LRDTR.
                           Data will be delivered Monday through Friday except
                           for Holidays as agreed. Data packages will be tracked
                           by invoice sequencing criteria. GTE contacts will be
                           provided for sending/receiving usage files.

         1.2.14            GTE will retain data backup for 45 Business Days. To
                           the extent this retention is exclusively for DTI, DTI
                           shall reimburse GTE for all expenses related to this
                           retention.

         1.2.15            In addition to the LSR delivery process, DTI will
                           distribute directory assistance and directory listing
                           information (together sometimes referred to hereafter
                           as "DA/DL information") to GTE via the LSR ordering
                           process over the NDM. GTE will provide listings
                           service via its "listing continuity" offering.

         1.2.16            Charges and credits for PIC changes ordered via an
                           LSR will appear on the wholesale bill. As DTI places
                           a request for a PIC change via LSR, the billing will
                           be made on DTI account associated with each
                           individual end user. GTE will process all PIC changes
                           from IXCs that are received for DTI end users by
                           rejecting back to the IXC with DTI OCN. Detail is
                           provided so that DTI can identify the specific
                           charges for rebilling to their end user.


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         1.2.17            CMDS. The parties provide for the distribution of
                           intraLATA CMDS incollect messages and/or selected
                           local measured service messages as follows:

                           1.2.17.1         Messages to be Screened. GTE
                                            receives CMDS I transmissions
                                            containing intraLATA incollect
                                            messages from the state RBOC CMDS
                                            host each business day. Per DTI's
                                            request, GTE will screen the
                                            incollects by NPA and line number
                                            and accumulate the Collect, Third
                                            Number Billed and Credit Card
                                            (collectively called incollects)
                                            messages in a data file. The
                                            screening will be for end users who
                                            have chosen DTI as their local
                                            service provider through a Resale or
                                            Unbundled Network arrangement. The
                                            screened incollect messages and any
                                            Local Measured Service (LMS) usage
                                            will be accumulated and forwarded to
                                            DTI. The Parties will mutually agree
                                            on the frequency of the data
                                            exchange and the method of
                                            transmission (i.e., magnetic tape or
                                            direct electronic transmission). GTE
                                            will forward the screened messages
                                            in the industry standard EMR format.
                                            GTE intraLATA toll messages that are
                                            recorded by GTE and dialed on a one
                                            plus or zero plus basis are not part
                                            of this section and will not be
                                            screened.

                           1.2.17.2         Compensation. GTE will bill DTI
                                            monthly for all services related to
                                            the screening, accumulating,
                                            processing and transmitting of
                                            incollect messages and LMS usage, if
                                            applicable, at a reasonable and
                                            mutually agreeable charge. In
                                            addition, any message processing fee
                                            associated with DTI's incollect
                                            messages that are charged to GTE by
                                            the CMDS Host will be passed on to
                                            DTI on the monthly statement. All
                                            revenue, surcharges, taxes and any
                                            other amounts due to the CMDS Host
                                            for DTI's incollect messages will be
                                            billed on the monthly statement. It
                                            is DTI's responsibility to bill and
                                            collect all incollect and LMS
                                            amounts due from its end users. The
                                            incollect and LMS revenue amounts
                                            that are listed on the monthly
                                            invoice are payable to GTE in total.
                                            The Parties agree that the
                                            arrangement for invoicing the
                                            incollect and LMS revenue amounts
                                            due GTE is not a settlement process
                                            with DTI.

                           1.2.17.3         Administration. The Parties agree to
                                            develop a process whereby DTI's end
                                            user information is available in a
                                            timely manner to allow GTE to build
                                            tables to screen the CMDS incollect
                                            files and LMS files on behalf of
                                            DTI.

         1.2.18            Backbilling. GTE shall bill DTI on a timely basis. In
                           no case shall GTE bill DTI for previously unbilled
                           charges that are for more than one year prior to the
                           current bill date.

1.3      Order Processing.

         1.3.1             Order Expectations. DTI agrees to warrant to GTE that
                           it is a certified provider of telecommunications
                           service. DTI will document its Certificate of
                           Operating Authority on DTI Profile and agrees to
                           update this DTI Profile as required to reflect its
                           current certification. The Parties agree to exchange
                           and to update end user contact and referral numbers
                           for order inquiry, trouble reporting, billing
                           inquiries, 


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                           and information required to comply with law 
                           enforcement and other security agencies of the 
                           government. The Parties also agree to exchange and to
                           update internal order, repair and billing point of 
                           contacts. Prior to submitting an order under this 
                           Agreement, DTI shall obtain such documentation as may
                           be required by state and federal laws and 
                           regulations.

         1.3.2             GTE shall provide DTI with a specified customer
                           contact center for purposes of placing service orders
                           and coordinating the installation of services. These
                           activities shall be accomplished by telephone call or
                           facsimile until electronic interface capability has
                           been established. The Parties adopt the OBF LSR and
                           DSR forms for the ordering, confirmation and billing
                           of resale and unbundled services. The Parties adopt
                           the OBF ASR forms for the ordering, confirmation and
                           billing of trunk-side interconnection.

         1.3.3             GTE will process such service orders during normal
                           operating hours, at a minimum on each Business Day
                           between the hours of 8 a.m. to 8 p.m. Eastern Time
                           and shall implement service orders within the same
                           time intervals used to implement service orders for
                           similar services for its own users.

         1.3.4             GTE will provide current GTE customer proprietary
                           network information (name, address, telephone number
                           and description of services provided by GTE including
                           PIC and white page directory listing information) as
                           provided in Article VI, Section 3. The return of
                           customer information will be via facsimile or via
                           electronic transmission.

         1.3.5             Transfer Between Local Service Providers - GTE will
                           provide a displacement/out service report to a Local
                           Service Provider (LSP) whenever an end user leaves
                           that LSP and procures service from another LSP. When
                           DTI end user changes to another LSP, GTE will notfiy
                           DTI when such activity occurs the day after
                           completion or within 48 hours of such disconnect.

2.       Maintenance Systems.

2.1      General Overview

         2.1.1             If DTI requires maintenance for its local service
                           customers, DTI will initiate a request for repair
                           (sometimes referred to as a "trouble report") by
                           calling GTE's Customer Care Repair Center. During
                           this call, GTE service representatives will verify
                           that the end-user is DTI customer and will then
                           obtain the necessary information from DTI to process
                           the trouble report. While DTI representatives are
                           still on the line, GTE personnel will perform an
                           initial analysis of the problem and remote line
                           testing for resale services. If engineered services
                           are involved, the call will be made to the GTE SSCC
                           for handling. If no engineering is required and the
                           line testing reveals that the trouble can be repaired
                           remotely, GTE personnel will correct the problem and
                           close the trouble report while DTI representatives
                           are still on the line. If on-line resolution is not
                           possible, GTE personnel will provide DTI
                           representatives a commitment time for repair, and the
                           GTE personnel then will enter the trouble ticket into
                           the GTE service dispatch queue. DTI's repair service
                           commitment times will be within the same intervals as
                           GTE provides to its own end users. Maintenance and
                           repair of GTE facilities is the responsibility of GTE
                           and will be performed at no incremental charge to
                           DTI. If, as a result of DTI-initiated trouble report,
                           trouble is found to be the responsibility of DTI
                           (e.g., non-network cause) GTE will charge DTI for
                           trouble isolation. DTI will have the ability to
                           report 



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                           trouble for its end users to appropriate trouble 
                           reporting centers 24 hours a day, 7 days a
                           week. DTI will be assigned a customer contact center
                           when initial service agreements are made.

         2.1.2             Repair calls to the SSCC for engineered services will
                           be processed in essentially the same manner as those
                           by the GTE Customer Care Center. GTE personnel will
                           analyze the problem, provide DTI representative with
                           a commitment time while they are still on the line,
                           and then place the trouble ticket in the dispatch
                           queue.

         2.1.3             GTE then will process all DTI trouble reports in the
                           dispatch queue along with GTE trouble reports in the
                           order they were filed (first in, first out), with
                           priority given to out-of-service conditions. If, at
                           any time, GTE would determine that a commitment time
                           given to DTI becomes in jeopardy, GTE service
                           representatives will contact DTI by telephone to
                           advise of the jeopardy condition and provide a new
                           commitment time.

         2.1.4             Trouble reports in the dispatch queue will be
                           transmitted electronically to GTE CZT service
                           technicians who will repair the service problems and
                           clear the trouble reports. For cleared DTI trouble
                           reports, GTE service technicians will make a
                           telephone call to DTI directly to clear the trouble
                           ticket. GTE service technicians will make the
                           confirmation call to the telephone number provided by
                           DTI. If DTI is unable to process the call or places
                           the GTE technician on hold, the call will be
                           terminated. To avoid disconnect, DTI may develop an
                           answering system, such as voice mail, to handle the
                           confirmation calls expeditiously.

         2.1.5             GTE will provide electronic interface access to
                           operation support systems functions which provide the
                           capability to initiate, status and close a repair
                           trouble ticket. GTE will not provide to DTI real time
                           testing capability on DTI end user services. GTE will
                           not provide to DTI an interface for network
                           surveillance (performance monitoring).

         2.1.6             GTE will resolve repair requests by or for DTI local
                           service customers using GTE's existing repair system
                           in parity with repair requests by GTE end users. GTE
                           will respond to service requests for DTI using the
                           same time parameters and procedures that GTE uses.
                           DTI then would call GTE's Customer Care Center or
                           SSCC while the customers were on hold.

2.2      Network Mananement Controls.

         2.2.1             Network Maintenance and Management. The Parties will
                           work cooperatively to install and maintain a reliable
                           network.

         2.2.2             Neither Party shall be responsible to the other if
                           necessary changes in network configurations render
                           any facilities of the other obsolete or necessitate
                           equipment changes.

         2.2.3             Network Management Controls. Each Party shall provide
                           a 24-hour contact number for Network Traffic
                           Management issues to the other's network surveillance
                           management center. A fax number must also be provided
                           to facilitate event notifications for planned mass
                           calling events. Additionally, both Parties agree that
                           they shall work cooperatively that all such events
                           shall attempt to be conducted in such a manner as to
                           avoid degradation or loss of service to other end
                           users. Each 



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                           Party shall maintain the capability of respectively 
                           implementing basic protective controls such as 
                           "Cancel To" and "Call Gap."

3.       Electronic Interface. The Parties shall work cooperatively in the
         implementation of electronic gateway access to GTE operational support
         systems functions in the long-term in accordance with established
         industry standards. DTI shall compensate GTE for the full costs
         including but not limited to design, development, testing,
         implementation and deployment, for access to GTE's Operational Support
         System functions. Where subsequent parties request use of GTE's
         operation support systems, cost recovery for such electronic interface
         systems shall be allocated among all requesting users.

3.1      DTI shall have immediate access to the following OSS electronic 
         interfaces that will provide functionality to enable DTI to service 
         customers in an equal and non-discriminatory manner:

         3.1.1             Pre-Order functions, e.g., TN Assignment, DD
                           Reservation, Address Validation, Product
                           Availability, that are available on a dial-up or
                           dedicated basis using the Secure Integrated Gateway
                           System (SIGS).

         3.1.2             Order functions that are available on a dial-up or
                           dedicated basis using CONNECT: Mail file transfer.

         3.1.3             Repair functions, e.g., trouble report repair
                           functions, to allow DTI to determine status and close
                           trouble reports.

         3.1.4             Electronic transfer of DTI bill in electronic data
                           811 format.

3.2      DTI may migrate to fully interactive system to system
         interconnectivity. GTE, with input from DTI and other carriers, shall
         provide general interface specifications for electronic access to this
         functionality. These specifications will be provided to enable DTI to
         design system interface capabilities. Development will be in accordance
         with applicable national standards committee guidelines. Such
         interfaces will be available as expeditiously as possible.

3.3      All costs and expenses for any new or modified electronic interfaces
         exclusively to meet DTI requirements that GTE determines are
         technically feasible and GTE agrees to develop will be paid by DTI.
         Costs for development of systems intended for common use by competing
         carriers will be assessed based on a mutually agreed method of cost
         recovery.

3.4      DTI shall be responsible for modifying and connecting any of its 
         pre-ordering and ordering systems with GTE provided interfaces as 
         described in this Appendix.

4.       GTE Initiated Electronic System Redesigns. GTE will not charge 
         DTI when GTE initiates its own electronic system 
         redesigns/reconfigurations.



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                                   APPENDIX J
                                  SS7 SERVICES

                                   ARTICLE 1.
                                   DEFINITIONS

In addition to the definitions contained elsewhere in the Agreement to which
this Appendix J is attached and made a part, for purposes of this Appendix J the
following terms shall have the following meanings.

1.1      "A" Link: An access signaling link that connects SPs and/or SSPs to 
         STPs.

1.2      "B" Link:  A bridge signaling link that connects two (2) sets or pairs 
         of STPs, not the STPs within a mated pair, but on the same hierarchical
         level.

1.3      Compatibility Testing: Certification testing performed by
         representatives of GTE and DTI to ensure proper interconnection of CCS
         network facilities for accurate transmission of system signals and
         messages. This certification testing shall be performed in accordance
         with the following ANSI documents:
                T1.234 Telecommunications - Signaling System Number 7 (SS7) -
                MTP Levels 2 and 3 Compatibility Testing (ATIS) 
                T1.235 Telecommunications - Signaling System Number 7 (SS7) - 
                SCCP Class 0 Compatibility Testing (ATIS) 
                T1.236 Telecommunications Signaling System Number 7 (SS7) - 
                ISDN User Part Compatibility Testing (ATIS)

1.4      Service:  The service described in Article 2 of this Appendix.

1.5      Signaling Link: An end-to-end high-capacity data link (56 kbps) that
         transmits supervision and control signals from one network SS7 node to
         another in a CCS network. The link type identifies the functionality of
         the signaling link sets. The two link types associated with the Service
         are "a" Links and "B" Links.

1.6      Signaling Point Code (SPC): A code that identifies the Signaling Point
         address in the CCS network. Signaling Point Codes consist of three (3)
         segments of three (3) digits each, identifying the network ID, network
         cluster, and cluster member, respectively.

1.7      Signaling Point of Interface (SPOI): The point at which GTE hands off
         signaling information to DTI.

                                   ARTICLE 2.
                               SERVICE DESCRIPTION

2.1      Provision. Subject to the terms and conditions of this Appendix, GTE
         agrees to provide the Service to DTI.

2.2      Interconnection. This Agreement is for DTI's interconnection with GTE
         at GTE's ____________ STPs to support local exchange services. DTI
         shall not submit signaling messages in support of interexchange
         services.
        
2.3      Service.  The "Service" consists of the following:

         (a)      Interconnection of GTE's CCS/SS7 network to DTI's CCS/SS7
                  network is via an "a" Link connection between DTI's SP or SSP
                  and GTE's STP. The "a" Link connection is made by a 


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<PAGE>   141


                  dedicated 56 kbps channel between the SP or SSP and the STP. 
                  Any connection from an SSP or an SP to an STP pair will have a
                  link to each individual STP (i.e., two (2) links). DTI and GTE
                  shall mutually agree upon the location of the SPOI.

         (b)      Interconnection of GTE's CCS/SS7 network to DTI's CCS/SS7
                  network via a "B" Link connection between DTI's STPs and GTE's
                  STPs. The "B" Link connection is a dedicated 56 kbps channel.
                  Connections between two (2) pairs of STPs will have four (4)
                  connections; i.e., one (1) link from each individual STP to
                  each individual STP. DTI and GTE shall mutually agree upon the
                  location of the SPOI.

         (c)      Local and IntraLATA call set-up signaling, allowing DTI to 
                  use the out-of-band trunk signaling provided by GTE's CCS/SS7 
                  network to carry its calls on the intraLATA toll network.

         (d)      The Service shall include access to: (1) all switching systems
                  served by a given STP which have been converted to SS7
                  signaling, including switching systems owned by other local
                  service providers; (2) databases directly connected to a given
                  STP, with the exception of 800/888 databases which can be
                  accessed through any STP; (3) other local service provider
                  STPs on an intraLATA basis; and (4) other Third Party local
                  service provider STPs on an intraLATA basis.

         (e)      It is the responsibility of DTI to populate the "privacy
                  indicator" portion of all SS7 signaling messages forwarded to
                  GTE's network. GTE agrees to deliver the information forwarded
                  by DTI in the SS7 signaling message. DTI, by entering into
                  this Agreement, agrees to deliver "privacy indicator"
                  information forwarded by GTE in its signaling message.

         (f)      DTI acknowledges that call set-up times may be greater when
                  DTI employs intermediate access tandems (IATs) in its network.

         (g)      If selected on the order form attached to this Appendix, the
                  Service shall also include IXC call set-up signaling service
                  (ISUP) as described in Article 2.4 of this Appendix.
                  Additional charges as set forth in Exhibit A shall apply.

2.4      ISUP Service Charge.  This is an optional service that allows DTI to 
         utilize SS7 signaling to an SS7 capable interexchange carrier (IXC) 
         for Feature Group D access service and other intraLATA interexchange 
         services.  The ISUP service is a monthly charge.

         (a)      The rate for ISUP signaling is per connection in situations
                  when GTE does not provide any underlying call messages for DTI
                  on GTE's network trunks. The rate for ISUP signaling is shown
                  in Exhibit a.

         (b)      Where GTE has a mated pair of STPs and has CCS/SS7
                  interconnection facilities to an IXC within the same LATA, for
                  interexchange telecommunications services, GTE shall provide
                  call set-up signaling between DTI and the IXC.

         (c)      DTI agrees to provide to GTE such information as deemed
                  necessary by GTE for network planning in connection with this
                  offering and as may be requested by GTE from time to time.

         (d)      DTI must provide the Signaling Point Codes of the IXCs for
                  which it is providing call setup via GTE's SS7 signaling
                  network, so that GTE screening and translation tables can be
                  updated.

2.5      Technical Specifications.  The technical specifications for the 
         Services described above are defined in Bellcore TR-TSV-000905.  GTE 
         will provide SS7 via OR-394-SS7 and/or OR-317-SS7 format(s).


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<PAGE>   142

2.6      Other Services. If DTI desires to order SS7-related services other than
         the Service, such services will be governed by separate agreements.

2.7      Applicable Traffic. The Service applies to the traffic of DTI and its
         subtending LECs only. DTI must provide GTE with thirty (30) calendar
         days' written notice and a letter of agency before the traffic of any
         party other than DTI or its subtending LECs may be transmitted through
         DTI's facilities on to GTE's SS7 network.

                                   ARTICLE 3.
                             MANNER OF PROVISIONING

3.1      Link Facilities. The link facilities to GTE STPs in the same LATA can 
         be either:

         (a)      "a" Link sets from DTI's SP or SSP. A minimum of two (2) links
                  is required, one (1) from the SP or SSP to each STP; or,

         (b)      "B" Link sets from DTI's STPs that are connected to GTE's
                  mated pairs of STPs. A minimum of four (4) links is required
                  between the two (2) pairs of STPs.

3.2      Port Termination. An STP port termination is required for each 56 kbps
         access link utilized for the Service. STP locations are set forth in
         the National Exchange Carrier Association, Inc. (NECA) Tariff, F.C.C.
         No. 4.

3.3      Signaling Point Codes. GTE shall install all applicable Signaling Point
         codes for each signaling link at each of GTE's interconnecting STPs.

3.4      Protocol. GTE shall provision the Service in accordance with ANSI
         T1.226 Telecommunications - Operations, Administration, Maintenance,
         and Provisioning (OAM&P) -Management of functions for Signaling System
         No. 7 (SS7) Network Interconnections (ATIS) with the exception of
         references to OMAP protocol elements. The Service cannot be established
         until Compatibility Testing has been successfully completed between DTI
         and GTE.

3.5      56 kbps Channel. Unless DTI elects to provide such links, GTE shall
         provide two (2) or four (4) 56 kbps circuits as link facilities at
         rates set forth in Article 4 herein. If approved by GTE, DTI may
         utilize a 56 kbps channel of an intraLATA DS1 (1.544 mbps) facility,
         which is in place at the time of ordering, as an "A" Link or a "B"
         Link, for the STP access connection between the SPOI and GTE's STP.
         WHEN THIS OPTION IS CHOSEN, DTI UNDERSTANDS AND ACCEPTS THAT THE
         SERVICE PERFORMANCE STANDARDS AS OUTLINED IN BELLCORE DOCUMENT
         TR-TSV-000905 MAY NOT BE MET IN THE PROVISION OF THE TOTAL SERVICE. If
         such a channel is not utilized, DTI must order DS1 (1.544 Mbps)
         service.

3.6      Multiplexing. Where technically required, GTE shall provide
         multiplexing arrangements to DTI at no charge.

3.7      Diversity. Where technically feasible and not unreasonably economically
         burdensome, GTE agrees to allow interoffice and intraoffice diversity.

                                   ARTICLE 4.
                                RATES AND CHARGES

4.1      Payment. DTI agrees to pay to GTE for the Service at the rates and
         charges set forth in Exhibit A attached to this Appendix and made a
         part hereof.



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4.2      Period. Subject to Article 4.3 below, the rates and charges shall
         remain in effect and are firm for a period of twelve (12) months from
         the effective date of this Appendix. Thereafter, GTE shall give DTI
         sixty (60) calendar days' notice any price change. If the new prices
         are not acceptable to DTI, DTI may terminate this Appendix upon thirty
         (30) calendar days' advance written notice without penalties for either
         Party.

4.3      Rate Basis. The rates are based upon rates and charges reflected in
         GTE's approved CCS/SS7 interconnection tariffs. To the extent that
         tariff rates are adjusted, rates and charges for similar rate elements
         in this Appendix will be adjusted accordingly on the date the new
         tariff rates become effective. If a state or federal regulatory agency
         requires, or GTE elects, to offer the Service by tariff, the tariff
         shall supersede this Appendix. If the Service becomes tariffed, DTI has
         the right to terminate this Appendix upon sixty (60) calendar days'
         advance written notice effective on the effective date of such tariff,
         without penalty to either Party.

4.4      Mileage. Mileage is calculated on the airline distance between the
         locations involved, using the V&H coordinates method, as set forth in
         the National Exchange Carrier Association, Inc. Tariff, F.C.C. No. 4.

4.5      Rates and Charges. Rates and charges for each component of the Service
         are described as follows:

         (a)      "A" Link connection - Charges for the "a" Link connection to 
                  GTE's CCS/SS7 network consist of the STP port termination 
                  charges.

                  (1)      The STP port termination charges are for the
                           termination of a 56 kbps channel at each STP from
                           DTI's SSP or SP.

                  (2)      DTI will lease facilities between its SSPs/SPs and
                           GTE's STPs.

         (b)      "B" Link connection - Charges for the "B" Link connection to 
                  GTE's CCS/SS7 network consist of the STP port termination 
                  charges.

                  (1)      The STP port termination charges are for the
                           termination of a 56 kbps channel at each STP from
                           DTI's STPs.

                  (2)      DTI and GTE shall mutually agree upon the rates for
                           "B" Link interconnections within thirty (30) calendar
                           days of the execution of this Agreement.

         (c)      STP Interconnection nonrecurring charge - STP interconnection
                  nonrecurring charge shall apply for each "A" Link and "B" Link
                  interconnection to GTE's SS7 network.

4.6      Rearrangement. Charges for rearrangement of the Service that are not
         specifically addressed will be determined by GTE on an individual case
         basis.

4.7      Applicable Traffic. The rates apply only to the traffic of DTI and its
         subtending LECs. Any traffic from any other party will be subject to
         additional charges.

                                   ARTICLE 5.
                              ORDERING THE SERVICE

5.1      Order. To order the Service, DTI shall submit a completed CCS/SS7 Order
         Form to GTE. DTI may change its Service order by submitting a new Order
         Form which shall be effective when executed by both Parties. Service
         shall be implemented for DTI thirty (30) calendar days after the
         execution of this Agreement by both Parties.


                                      J-4
<PAGE>   144

5.2      Port Terminations. GTE shall reserve STP port terminations only upon
         receipt of a fully executed copy of this Agreement and the Order Form
         referred to in this Appendix. GTE shall reserve ports on a first come,
         first served basis. Should DTI fail to use a port within sixty (60)
         Business Days of availability, GTE may reassign the port and, DTI must
         resubmit an Order Form for interconnection.

                                   ARTICLE 6.
                             RESPONSIBILITIES OF GTE

6.1      Managing the Network. GTE is responsible for managing the network
         provided by GTE as part of the Service and applying protective controls
         which it can invoke as a result of occurrences including, but not
         limited to, failure or overload of GTE or DTI facilities due to natural
         disasters, mass calling or national security demands.

6.2      Performance Standards. GTE is responsible for meeting service
         performance standards as outlined in Bellcore TR-TSV-000905 except as
         otherwise provided herein.

6.3      Invoice. GTE shall include with the monthly invoice such data GTE and
         DTI mutually agree is necessary for DTI to verify the accuracy of the
         billing it receives from GTE for the Service.

                                   ARTICLE 7.
                             RESPONSIBILITIES OF DTI

7.1      Signaling Link. DTI shall provision the signaling links from its
         premises to the SPOIs in a manner technically compatible to the GTE
         network.

7.2      Privacy Indicator. DTI shall populate the "privacy indicator" portion
         of the CCS/SS7 initial address message forwarded to GTE's network for
         call processing.

7.3      Accuracy of Information. DTI shall verify the accuracy of information
         provided by DTI concerning the Service ordered by DTI.

7.4      Forecast. DTI shall furnish to GTE, at the time the Service is ordered
         and annually thereafter, an updated three year forecast of usage for
         the 56 kbps channel and the STP port termination for each STP pair. The
         forecast shall include total annual volume and busy hour busy month
         volume. GTE shall utilize the forecast in its own efforts to project
         further facility requirements.

7.5      Changes. DTI agrees to inform GTE in writing at least thirty (30)
         Business Days in advance of any change in its use of the Service that
         alters by ten percent (10%) or more for any thirty (30) day period the
         volume of signaling transactions to be forwarded to GTE's CCS/SS7
         network. DTI will provide the reason for the change in volume by
         individual SS7 service.

                                   ARTICLE 8.
                              SIGNALING POINT CODES

8.1      Interconnection. DTI may utilize either the GTE CCS/SS7 network SPC or
         its own SPC for interconnection purposes when interconnecting its SPs
         or SSPs at the "A" Link level. DTI shall utilize its own SPC when
         interconnecting its STP at the "B" Link level. DTI agrees to obtain its
         own initial SPC if it has short or long range plans to provide its own
         STPs.

8.2      SPC. When the SPC is utilized, GTE shall be responsible for DTI code
         assignment. When DTI obtains its own SPC, DTI shall be responsible for
         code assignments and shall be responsible for notifying GTE and other
         CCS/SS7 network providers of such assignments.



                                      J-5
<PAGE>   145

8.3      SPC Change. Due to the complexities and potential DTI signaling network
         downtime required for changing working SPCs, DTI agrees to give GTE a
         written notice of an SPC change as soon as possible but no later than
         thirty (30) Business Days prior to the effective date of the SPC
         change.

                                   ARTICLE 9.
                                 MONTHLY BILLING

Billing statements shall be rendered monthly by GTE to DTI. The monthly charge
shall be the total of all monthly rate element charges associated with the
Service. Payment to GTE for bills rendered to DTI shall be due thirty (30)
calendar days after receipt of the invoice and DTI agrees to pay all billed
amounts. Beginning the day after the due date of the bill, interest charges of
twelve per cent (12%) per annum or the maximum allowed by law, whichever is
less, shall be added to DTI's bill. Payments shall be applied to the oldest
outstanding amounts first.

                                   ARTICLE 10.
                          LIABILITY AND INDEMNIFICATION

10.1     Release from Liability. Each Party releases the other from any
         liability for loss or damage arising out of errors, interruptions,
         defects, failures, delays, or malfunctions of the Service, including
         any and all associated equipment and data processing systems, not
         caused by gross negligence or willful misconduct. Any losses or damages
         for which either Party is held liable under this Agreement shall in no
         event exceed the amount of the charges for the Service during the
         period beginning at the time notice of the error, interruption, defect,
         failure, or malfunction is received, to the time Service is restored.

10.2     Limitation of Liability. IN ADDITION TO THE LIMITATION OF LIABILITY SET
         FORTH AT SECTION 24.4 OF ARTICLE III OF THE AGREEMENT, NEITHER PARTY
         SHALL BE LIABLE FOR ANY LOSS OF REVENUE OR PROFIT OR FOR ANY LOSS OR
         DAMAGE ARISING OUT OF THIS AGREEMENT OR OUT OF THE USE OF THE CCS OR
         ANY OF THE SERVICES PROVIDED UNDER THIS AGREEMENT THAT IS SUFFERED BY
         THE OTHER PARTY, WHETHER ARISING IN CONTRACT, TORT (INCLUDING WITHOUT
         LIMITATION NEGLIGENCE OR STRICT LIABILITY) OR OTHERWISE AND WHETHER OR
         NOT INFORMED OF THE POSSIBILITY OF SUCH DAMAGES IN ADVANCE. NEITHER
         PARTY SHALL BE LIABLE FOR ANY SPECIAL, INCIDENTAL, OR CONSEQUENTIAL
         DAMAGES.

10.3     Third Parties. Each Party agrees to release, defend, indemnify, and
         hold harmless the other Party from and against any and all losses,
         damages, or other liability, including reasonable attorneys' fees, that
         it may incur as a result of claims, demands, wrongful death actions, or
         other suits brought by third parties, arising out of the use of the
         Service and resulting from the gross negligence or willful misconduct
         by the indemnifying Party, its employees, agents, or contractors in the
         performance of this Agreement. In addition, to the extent that the
         Parties' interests do not conflict, DTI shall defend GTE against all
         end users' claims just as if DTI had provided such service to its end
         users with its own employees. In any event, DTI shall assert its tariff
         limitation of liability for the benefit of both GTE and DTI.

10.4     Infringement. Each Party agrees to release, defend, indemnify, and hold
         harmless the other Party from and against any claim, demands or suit
         that asserts any infringement or invasion of privacy or confidentiality
         of any person(s), caused or claimed to be caused, directly or
         indirectly, by the indemnifying Party's employees or equipment
         associated with provision of the Service. This includes, but is not
         limited to, suits arising from disclosure of any customer-specific
         information associated with either the originating or terminating
         numbers used to provision the Service.


                                      J-6
<PAGE>   146

10.5     No Warranties. IN ADDITION TO THE DISCLAIMER SET FORTH AT SECTION 24.3
         OF ARTICLE III OF THE AGREEMENT, NEITHER GTE NOR DTI MAKES ANY
         REPRESENTATIONS OR WARRANTIES TO THE OTHER OR TO ANY THIRD PARTY
         CONCERNING THE SPECIFIC QUALITY OF ANY SERVICES PROVIDED UNDER OR IN
         CONNECTION WITH THIS APPENDIX, THAT THE SERVICES PROVIDED UNDER THIS
         APPENDIX WILL BE ERROR FREE OR THAT THE FACILITIES WILL OPERATE WITHOUT
         INTERRUPTION. GTE AND DTI DISCLAIM, WITHOUT LIMITATION, ANY WARRANTY OR
         GUARANTEE OF MERCHANTABILITY OR FITNESS FOR a PARTICULAR PURPOSE,
         ARISING FROM COURSE OF PERFORMANCE, COURSE OF DEALING OR FROM USAGES OF
         TRADE.

                                   ARTICLE 11.
                              RESERVATION OF RIGHTS

11.1     Rights Reserved. By entering into this Appendix to the Agreement,
         neither Party waives, releases or compromises any rights it may have to
         argue, in any federal or state regulatory proceeding (or in any
         judicial appeal following such a proceeding), in support of, or in
         opposition to any position, including but not limited to: (a)
         Accounting for deregulated (or detariffed) data base services; (b)
         removal from regulated accounts of expenses and investment associated
         with deregulated (or detariffed) data base services; and (c) any other
         issue pertinent to regulation or deregulation of costs which were, are
         now, or may in the future be, associated with the provisions of data
         base services. Each Party expressly reserves all its rights in
         connection with such matters.















                                      J-7
<PAGE>   147


                                  EXHIBIT A

                              RATES AND CHARGES

                            for Interconnection at
                      GTE's___________-________,____ STP


<TABLE>
<CAPTION>

                                                                            Rates & Charges
                        Rate Element                           Nonrecurring                   Monthly
- -------------------------------------------------------------------------------------------------------
<S>      <C>                                                         <C>                       <C>
1.        STP Port Termination for an "A" Link Per Port               $ 65.00                   $229.00

2.        STP Port Termination for a "B" Link Per Port                $ 65.00                   $229.00

3.        56 Kbps Digital Facility
          Dedicated Switched Access Transport
          Per Airline Mile                                                                      $4.91

4.        56 Kbps Dedicated Switched Access Line                      $100.00                   $91.06

5.        1.544 Mbps (DS1) High Capacity Digital                                                $11.50
          Facility Dedicated Switched Access Transport
          Per Airline Mile

6.        1.544 Mbps (DS1) Dedicated Switched Access                  $1500.00                  $168.67
          Line

7.        Facility Charge for "B" Links                               Depends negotiated
                                                                      interconnection agreement
                                                                      
8.        ISUP Charge per Interconnection                                                       $500.00


8.1       For ISUP Service an additional SCP charge shall apply per interconnection.

</TABLE>



                                      J-8
<PAGE>   148
                                   APPENDIX K
                            POLE ATTACHMENT AGREEMENT

1.       Parties.

         This agreement (Agreement) is between GTE ARKANSAS INCORPORATED/GTE
         MIDWEST INCORPORATED, a State of ____________ corporation having its
         principal office at __________ ("GTE"), and DIGITAL TELEPORT, INC., a
         corporation of the State of ________, having its principal office at
         _______ ("Licensee"). 

2.       Definitions.

2.1      "GTE's poles" or "GTE pole(s)" means a pole or poles solely owned by
         GTE, jointly owned by GTE and another entity, and space on poles
         obtained by GTE through arrangements with the owner(s) thereof.

2.2      "Telecommunications Services" means the offering of telecommunications
         for a fee directly to the public, or to such classes of users as to be
         effectively available directly to the public, regardless of the
         facilities used.

2.3      "Cable Television Services" means the transmission to subscribers of
         off-the-air pickup of broadcast signals or the transmission, without
         separate charge, of locally originated closed circuit television to the
         subscribers of off-the-air service.

2.4      "Attachments" means the equipment reasonably required by Licensee to
         provide its Telecommunications Services or Cable Television Services
         that is placed on GTE's poles.

2.5      "Make-Ready Work" means all work, including, but not limited to,
         rearrangement, removal, or transfer of existing attachments, placement,
         repair, or replacement of poles, or any other changes required to
         accommodate the Licensee's Attachments on a pole.

2.6      "Hazardous Materials" means (i) any substance, material or waste now or
         hereafter defined or characterized as hazardous, extremely hazardous,
         toxic or dangerous within the meaning of the Comprehensive
         Environmental Response, Compensation and Liability Act of 1980, as
         amended, or any similar law, ordinance, statute, rule or regulation of
         any governmental body or authority, (ii) any substance, material or
         waste now or hereafter classified as a contaminant or pollutant under
         any law, ordinance, statute, rule or regulation of any governmental
         body or authority or (iii) any other substance, material or waste, the
         manufacture, processing, distribution, use, treatment, storage,
         placement, disposal, removal or transportation of which is now or
         hereafter subject to regulation under any law, ordinance, statute, rule
         or regulation of any governmental body or authority.

2.7      "Attachment Fee" means the fee assessed per pole and paid by Licensee
         to place Attachments on GTE's poles.

3.       Purpose.

3.1      Licensee represents to GTE that Licensee has a need to occupy, place
         and maintain Attachments on GTE's poles for the purpose of providing
         Telecommunications Services.

3.2      GTE agrees to permit Licensee to occupy, place and maintain its
         Attachments on such GTE poles as GTE may allow pursuant to the terms of
         this Agreement.


                                      K-1
<PAGE>   149

4.       Grant of License.

         GTE grants to Licensee and Licensee accepts from GTE a non-exclusive
         revocable license to occupy, place and maintain in a designated space
         on specified GTE poles Licensee's Attachments on the terms and
         conditions set forth herein. Licensee shall have no further right,
         title, or other interest in connection with GTE's poles. GTE shall have
         the right to grant, renew or extend privileges to others not parties to
         this Agreement to occupy, place or maintain Attachments on or otherwise
         use any or all GTE poles. Nothing herein is intended to, nor should it
         be construed to require GTE to construct or modify any facilities not
         needed for its own service requirements. GTE grants this license in
         reliance on the representation of Licensee that Licensee intends to
         provide Telecommunications Services with the Attachments covered by
         this Agreement.

5.       Term.

         Subject to the termination provisions contained in this Agreement, the
         term of this Agreement shall be two (2) years from the effective date
         referenced in the first paragraph of this Agreement and shall continue
         in effect for consecutive one (1) year terms until either Party gives
         the other Party at least ninety (90) calendar days written notice of
         termination, which termination shall be effective at the end of the
         then-current term. In the event notice is given less than ninety (90)
         calendar days prior to the end of the current term, this Agreement
         shall remain in effect for ninety (90) calendar days after such notice
         is received, provided, that in no case shall the term be extended
         beyond ninety (90) calendar days after the end of the current term.

6.       Pole Attachment Requests (PARs).

6.1      Licensee shall submit a written Pole Attachment Request ("PAR") to GTE
         identifying the GTE poles upon which it desires to place Attachments.
         Each PAR shall be in a form specified by GTE and may be revised from
         time to time by GTE. All PARs submitted to GTE shall be processed on a
         first come, first served basis. GTE, in its sole judgment, will
         determine the availability of space on the GTE pole(s) specified in the
         PAR and will provide its response to the PAR within thirty (30)
         Business Days of its submission. Upon approval of the PAR, GTE shall
         return one copy thereof to Licensee bearing an endorsement
         acknowledging GTE's authorization. All Attachments placed on GTE's
         poles pursuant to an approved PAR shall become subject to all of the
         terms and conditions of this Agreement. Licensee may submit subsequent
         PARs for approval by GTE as needed. GTE is under no obligation to
         provide general information respecting the location and availability of
         GTE poles, except as may be necessary to process a PAR. No Attachment
         shall be placed on any GTE pole identified in a PAR until that PAR has
         been approved by GTE.

6.2      Licensee shall pay GTE a fee for processing a PAR to compensate GTE for
         the general administrative costs as well as the actual engineering
         costs reasonably incurred. The fee for engineering costs shall be
         computed by multiplying the fully loaded hourly rate for an engineer
         times the number of hours reasonably required by each engineer to
         inspect the GTE poles included in the PAR. GTE will charge its then
         current rates for administrative and engineering costs, as may be
         changed from time to time by GTE to remain consistent with prevailing
         costs.

6.3      Upon receiving an approved PAR, Licensee shall have the right, subject
         to the terms of this License, to place and maintain the facilities
         described in the PAR in the space designated on the GTE poles
         identified therein.

6.4      In the event Make-Ready Work is necessary to accommodate Licensee's
         Attachments, GTE shall notify Licensee of such fact and provide
         Licensee with a good faith estimate of the total cost of such
         Make-Ready Work needed to accommodate Licensee's Attachments. Within
         fifteen (15) 

                                      K-2
<PAGE>   150

         days after receiving such notice from GTE, Licensee shall notify GTE
         either (1) that Licensee shall pay all of the costs actually incurred
         to perform the Make-Ready Work and shall pay the total estimated amount
         to GTE at least ten (10) days prior to the date the Make-Ready Work is
         to begin or (2) that it desires to cancel its PAR.

6.5      GTE shall not be responsible to Licensee for any loss sustained by
         Licensee by reason of the refusal or failure of any other party with
         attachments on GTE's poles to rearrange or modify its attachments as
         may be required to accommodate Licensee's Facilities.

6.6      Licensee is not authorized and shall have no right to place facilities
         on any GTE pole unless that GTE pole is identified in an approved PAR.

7.       Availability of Information Regarding Space on Poles.

         GTE will provide information regarding the availability of pole space
         within thirty (30) Business Days of a written request by Licensee.
         Because GTE will endeavor to determine available space as quickly as
         possible, a shorter interval may be experienced for requests of a
         limited scope where physical field verification is not necessary. In
         the event the thirty (30) Business Day time frame cannot be met, GTE
         shall so advise Licensee and shall seek a mutually satisfactory
         alternative response date. No representation regarding the availability
         of space shall be made in the absence of a physical field verification.

8.       Authority to Place Attachments.

8.1      Before Licensee places any Attachments on GTE's poles pursuant to an
         approved PAR, Licensee shall submit evidence satisfactory to GTE of its
         authority to erect and maintain the facilities to be placed on GTE's
         poles within the public streets, highways and other thoroughfares or on
         private property. Licensee shall be solely responsible for obtaining
         all rights-of-way, easements, licenses, authorizations, permits and
         consents from federal, state and municipal authorities or private
         property owners that may be required to place Attachments on GTE's
         poles. In the event Licensee must obtain any additional easements,
         permits, approvals, licenses and/or authorizations from any
         governmental authority or private individual or entity in order to
         utilize GTE's poles under an approved PAR, GTE shall, upon Licensee's
         request, provide written confirmation of its consent to Licensee's
         utilization of poles in a particular location in accordance with this
         Agreement, if needed by Licensee to obtain such additional approvals or
         authorizations. GTE shall also provide maps or drawings of its
         facilities' locations to the extent reasonably required by such
         governmental authority or private individual or entity for purposes of
         considering or granting Licensee's request to it for authority or
         approval.

8.2      GTE shall not unreasonably intervene in or attempt to delay the
         granting of any rights-of-way, easements, licenses, authorizations,
         permits and consents from federal, state or municipal authorities or
         private property owners that may be required for Licensee to place its
         Attachments on GTE's poles.

8.3      If any right-of-way, easement, license, authorization, permit or
         consent obtained by Licensee is subsequently revoked or denied for any
         reason, Licensee's permission to attach to GTE's poles shall terminate
         immediately and Licensee shall promptly remove its Attachments. Should
         Licensee fail to remove its Attachments within one hundred twenty (120)
         days of receiving notice to do so from GTE, GTE shall have the option
         to remove all such Attachments and store them in a public warehouse or
         elsewhere at the expense of and for the account of Licensee without GTE
         being deemed guilty of trespass or conversion, and without GTE becoming
         liable for any loss or damages to Licensee occasioned thereby. All
         costs incurred by GTE to remove Licensee's Attachments shall be
         reimbursed to GTE by Licensee upon demand.


                                      K-3
<PAGE>   151

8.4      Upon notice from GTE to Licensee that the cessation of the use of any
         one or more of GTE's poles is necessary for reasons of safety or has
         been directed by any federal, state or municipal authority, or private
         property owner, permission to attach to such pole or poles shall
         terminate immediately and Licensee promptly shall remove its
         Attachments. Should Licensee fail to remove its Attachments within the
         time frame provided by the requesting or directing party or one hundred
         twenty (120) days of receiving notice to do so from GTE, whichever is
         less, GTE shall have the option to remove all such Attachments and
         store them in a public warehouse or elsewhere at the expense of and for
         the account of Licensee without GTE being deemed guilty of trespass or
         conversion, and without GTE becoming liable for any loss or damages to
         Licensee occasioned thereby. All costs incurred by GTE to remove
         Licensee's Attachments shall be reimbursed to GTE by Licensee upon
         demand by GTE.

9.       Placement of Attachments.

9.1      Licensee shall, at its own expense, place and maintain its Attachments
         on GTE's poles in accordance with (I) such requirements and
         specifications as GTE shall from time to time prescribe in writing,
         (ii) all rules or orders now in effect or that hereafter may be issued
         by any regulatory agency or other authority having jurisdiction, and
         (iii) all currently applicable requirements and specifications of the
         National Electrical Safety Code, and the applicable rules and
         regulations of the Occupational Safety and Health Act. Licensee agrees
         to comply, at its sole risk and expense, with all specifications
         included in Exhibits _____ through _____ hereto, as may be revised
         from time to time by GTE.

9.2      Licensee's Facilities shall be tagged at maximum intervals of 300 feet
         so as to identify Licensee as the owner of the Facilities. The tags
         shall be of sufficient size and lettering so as to be easily read from
         ground level.

10.      Failure of Licensee to Place Attachments.

         Once Licensee has obtained an approved PAR, Licensee shall have sixty
         (60) days from the date the PAR is approved to begin the placement of
         its Attachments on the GTE poles covered by the PAR. If Licensee has
         not begun placing its Attachments within that sixty (60) day period,
         Licensee shall so advise GTE with a written explanation for the delay.
         If Licensee fails to advise GTE of its delay, with a written
         explanation therefor, or if Licensee fails to act in good faith by not
         making a bona fide effort to begin placing its Attachments within the
         sixty (60) days prescribed by this Section, the previously approved PAR
         shall be deemed rescinded by GTE and Licensee shall have no further
         right to place Attachments pursuant to that PAR.

11.      Attachment Fees.

11.1     Licensee shall pay to GTE an Attachment Fee, as specified in Exhibit
         _____ hereto, for each GTE pole upon which Licensee obtains
         authorization to  place an Attachment. The Attachment Fee may be
         increased by GTE from  time to time as permitted by law upon sixty
         (60) days written notice to Licensee.

11.2     Attachments Fees shall become due and payable on the date a PAR is
         approved by GTE for all GTE poles identified in that PAR on a pro rata
         basis until the end of the then current year and thereafter on an
         annual basis within thirty (30) days of the date of a statement from
         GTE specifying the fees to be paid. Any payment after thirty (30) days
         shall bear interest at the rate of eighteen percent (18%) per annum or
         the maximum rate allowed by law, whichever is less.

11.3     GTE shall maintain an inventory of the total number of GTE poles
         occupied by Licensee based upon the cumulative number of poles
         specified in all PARs approved by GTE. GTE may, at its 

                                      K-4
<PAGE>   152

         option, conduct a physical inventory of Licensee's Attachments under
         this Section. It shall be Licensee's sole responsibility to notify GTE
         of any and all removals of Attachments from GTE's poles. Except as
         provided in Section 18 of this Agreement in connection with the
         termination of this Agreement, such notice shall be provided to GTE at
         least thirty (30) days prior to the removal of the Attachments. Each
         Notice of Removal shall be in a form specified by GTE and may be
         revised from time to time at GTE's sole discretion. Licensee shall
         remain liable for Attachment Fees until Licensee's Attachments have
         been physically removed from GTE's poles.

12.      Modifications, Additions or Replacements to Existing Attachments.

12.1     Licensee shall not modify, add to or replace Facilities on any
         pre-existing Attachment without first notifying GTE in writing of the
         intended modification, addition or replacement at least thirty (30)
         days prior to the date the activity is scheduled to begin. The required
         notification shall include: (1) the date the activity is scheduled to
         begin, (2) a description of the planned modification, addition or
         replacement, (3) a representation that the modification, addition or
         replacement will not require any space other than the space previously
         designated for Licensee's Attachments, and (4) a representation that
         the modification, addition or replacement will not impair the
         structural integrity of the poles involved.

12.2     Should GTE determine that the modification, addition or replacement
         specified by Licensee in its notice will require more space than that
         allocated to Licensee or will require the reinforcement of, replacement
         of or an addition of support equipment to the poles involved in order
         to accommodate Licensee's modification, addition or replacement, GTE
         will so notify Licensee, whereupon Licensee will be required to submit
         a PAR in compliance with this Agreement in order to obtain
         authorization for the modification, addition or replacement of its
         Attachments.

12.3     Access to GTE's poles for repairs, modifications, additions, or
         replacements required in emergency situations shall be governed by
         Section 22 of this Agreement.

12.4     Should Licensee request GTE to expand capacity or purchase additional
         plant, Licensee agrees to pay all costs.

13.      Rearrangements to Accommodate Other Licensees.

         Licensee acknowledges that at some point in the future it may become
         necessary to rearrange Licensee's Facilities in order to create space
         to accommodate the facilities of another licensee. Licensee agrees that
         in such event Licensee will cooperate in good faith with such other
         licensee to come to a mutually agreeable understanding regarding the
         manner in which the rearrangement of Licensee's Facilities will be
         achieved.

14.      Unauthorized Attachments.

14.1     The parties agree that because it would be impracticable and extremely
         difficult to determine the actual amount of damages resulting from
         Licensee's unauthorized Attachment(s), a charge equal to five (5) times
         the amount of the then current Attachment Fee shall be paid by Licensee
         to GTE for each unauthorized Attachment to a GTE pole. Such payment
         shall be deemed liquidated damages and not a penalty. Licensee also
         shall pay GTE an Attachment Fee for each unauthorized Attachment
         accruing from the date the unauthorized Attachment was first placed on
         the GTE pole. In the event that the date the unauthorized Attachment
         was first placed on a GTE pole cannot be determined, such date shall be
         deemed the date of the last physical inventory made in accordance with
         this Agreement or, if no physical inventory has been conducted, the
         date the first PAR from Licensee was approved in accordance with this
         Agreement. Licensee also shall pay to GTE all costs incurred by GTE to
         rearrange any 

                                      K-5
<PAGE>   153

         unauthorized Attachment(s) of Licensee if such rearrangement is
         required to safeguard GTE's Attachment(s) or to accommodate the
         Attachment(s) of another party whose Attachment(s) would not have
         required a rearrangement but for the presence of Licensee's
         unauthorized Attachment(s). Licensee shall also pay to GTE all costs
         incurred by GTE to reinforce, replace or modify any GTE pole, which
         reinforcement, replacement or modification was required as a result of
         the unauthorized Attachment of Licensee. The Attachment Fee referenced
         in this subsection 14.1 shall be determined in the same manner as such
         fee would have been determined if the attachment had been authorized by
         GTE.

14.2     For purposes of this section, an unauthorized Attachment shall include,
         but not be limited to:

         14.2.1   An Attachment to a GTE pole which pole is not identified in
                  any PAR approved in accordance with this Agreement;

         14.2.2   An Attachment that occupies more space than that allocated to
                  Licensee by GTE;

         14.2.3   An Attachment that is not placed in accordance with the
                  provisions of this Agreement or the appropriate PAR issued
                  pursuant to this Agreement;

         14.2.4   An addition or modification by Licensee to its pre-existing
                  Attachment(s) that impairs the structural integrity of the
                  involved GTE pole(s).

         14.2.5   An Attachment that consists of facilities owned or controlled
                  by, and for the use of a party other than Licensee.

15.      Surveys and Inspections of Pole Attachments.

15.1     Upon written notice to Licensee, the total number and exact location of
         Licensee's Attachments on GTE's poles may be determined, at GTE's
         discretion, through a survey to be made not more than once per calendar
         year by GTE. If so requested, Licensee and/or any other entity owning
         or jointly owning the poles with GTE may participate in the survey. The
         costs incurred by GTE to conduct the survey shall be reimbursed to GTE
         by Licensee upon demand by GTE. If the Attachments of more than one
         Licensee are surveyed, each such Licensee shall contribute a
         proportionate share of the costs reimbursed to GTE.

15.2     Apart from surveys conducted in accordance with this section, GTE 
         shall have the right to inspect any Attachment of Licensee on GTE's
         poles as conditions may warrant upon written notice to Licensee.
         Licensee shall, upon demand by GTE, reimburse GTE all costs incurred   
         to conduct its inspection. No joint survey or inspection, or lack
         thereof, by GTE shall operate to relieve Licensee of any
         responsibility, obligation or liability assumed under this Agreement.

16.      Notice of Modification or Alteration of Poles by GTE.

16.1     In the event GTE plans to modify or alter any GTE pole(s) upon which
         Licensee has Attachments, GTE shall provide Licensee notice of the
         proposed modification or alteration at least thirty (30) days prior to
         the time the proposed modification or alteration is scheduled to take
         place. Should Licensee decide to modify or alter its Attachments on the
         GTE poles to be modified or altered by GTE, Licensee shall so notify
         GTE in writing. In such event, Licensee shall bear a proportionate
         share of the total costs incurred by GTE to make such poles accessible
         to Licensee.

16.2     In the event GTE is required by a federal, state, or local authority to
         move, replace or change the location of any GTE pole(s), Licensee shall
         concurrently relocate Licensee's Attachments. GTE 

                                      K-6
<PAGE>   154

         and each Licensee required to relocate its Attachments shall bear its
         own costs for such relocation.

17.      Disclaimer of Warranties.

         EXCEPT AS SPECIFICALLY SET FORTH IN THIS AGREEMENT, GTE MAKES NO
         WARRANTIES, EXPRESS OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, ANY
         IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR a PARTICULAR
         PURPOSE.

18.      Default and Remedies.

18.1     The occurrence of any one of the following shall be deemed a Material
         Default by Licensee under this Agreement:

         18.1.1   Failure by Licensee to pay any fee or other sum required to be
                  paid under the terms of this Agreement and such default
                  continues for a period of ten (10) days after written notice
                  thereof to Licensee;

         18.1.2   Failure by Licensee to perform or observe any other term,
                  condition, covenant, obligation or provision of this Agreement
                  and such default continues for a period of thirty (30) days
                  after written notice thereof from GTE (provided that if such
                  default is not curable within such thirty (30) day period, the
                  period will be extended if Licensee commences to cure such
                  default within such thirty (30) day period and proceeds
                  diligently thereafter to effect such cure);

         18.1.3   The filing of any tax or mechanic's lien against GTE's poles
                  which is not bonded or discharged within thirty (30) days of
                  the date Licensee receives notice that such lien has been
                  filed;

         18.1.4   Licensee's voluntary or involuntary bankruptcy;

         18.1.5   Licensee's knowing use or maintenance of its Attachments in
                  violation of any law or regulation, or in aid of any unlawful
                  act or undertaking;

         18.1.6   If any authorization which may be required of the Licensee by
                  any governmental or private authority for the placement,
                  operation or maintenance of Licensee's Attachments is denied
                  or revoked.

18.2     In the event of a Material Default, GTE, without any further notice to
         the Licensee (except where expressly provided for below or required by
         applicable law) may do any one or more of the following:

         18.2.1   Perform, on behalf and at the expense of Licensee, any
                  obligation of Licensee under this Agreement which Licensee has
                  failed to perform and of which GTE shall have given Licensee
                  notice, the cost of which performance shall be paid by
                  Licensee to GTE upon demand;

         18.2.2   Terminate this Agreement by giving notice of such termination
                  to Licensee and remove Licensee's Attachments and store them
                  in a public warehouse or elsewhere at the expense of and for
                  the account of Licensee without GTE being deemed guilty of
                  trespass or conversion, and without GTE becoming liable for
                  any loss or damages to Licensee occasioned thereby; or


                                      K-7
<PAGE>   155

         18.2.3   Exercise any other legal or equitable right or remedy which
                  GTE may have.

18.3     Any costs and expenses incurred by GTE (including, without limitation,
         reasonable attorneys' fees) in enforcing this Agreement shall be repaid
         to GTE by Licensee upon demand.

18.4     Upon termination of this Agreement by GTE because of a material default
         by Licensee, Licensee shall remain liable to GTE for any and all fees,
         other payments and damages which may be due or sustained prior to such
         termination, all reasonable costs, fees and expenses, including,
         without limitation, reasonable attorneys' fees incurred by GTE in
         pursuit of its remedies hereunder, and additional liquidated damages
         which shall be an amount equal to one full year of Pole Attachment
         fees.

18.5     All rights and remedies of each party set forth in this Agreement shall
         be cumulative and none shall exclude any other right or remedy, now or
         hereafter allowed by or available under any statute, ordinance, rule of
         court, or the common law, either at law or in equity, or both.

19.      Indemnification.

19.1     Licensee shall compensate GTE for the full actual loss, damage or
         destruction of GTE's property that in any way arises from or is related
         to this Agreement or activities undertaken pursuant to this Agreement
         (including, without limitation, the installation, construction,
         operation or maintenance of Licensee's Attachments).

19.2     Licensee will further indemnify, defend and hold harmless GTE and GTE's
         agents, officers, employees and assigns, from any and all losses,
         damages, costs, expenses (including, without limitation, reasonable
         attorneys' fees), statutory fines or penalties, actions or claims for
         personal injury (including death), damage to property, or other damage
         or financial loss of whatever nature in any way arising out of or
         connected with this Agreement or activities undertaken pursuant to this
         Agreement (including, without limitation, the installation,
         construction, operation or maintenance of Licensee's Attachments),
         except to the extent caused by the gross negligence or willful
         misconduct on the part of GTE or GTE's agents, officers, employees and
         assigns. Licensee further indemnifies GTE from subsequent taxes and
         fees that may be levied by municipalities ROWs in association with
         these agreements. Such fees that are levied would be in addition to the
         attachment/occupancy fees reflected in this Agreement. Licensee
         expressly assumes all liability for actions brought against GTE and
         GTE's agents, officers, employees and assigns, by Licensee's agents,
         officers or employees and Licensee expressly waives any immunity from
         the enforcement of this indemnification provision that might otherwise
         be provided by workers' compensation law or by other state or federal
         laws.

19.3     Without limiting any of the foregoing, Licensee assumes all risk of,
         and agrees to relieve GTE of any and all liability for, loss or damage
         (and the consequences of loss or damage) to any Attachments placed on
         GTE's poles and any other financial loss sustained by Licensee, whether
         caused by fire, extended coverage perils, or other casualty, except to
         the extent caused by the gross negligence or willful misconduct on the
         part of GTE or GTE's agents, officers, employees and assigns.

19.4     Without limiting the foregoing, Licensee expressly agrees to indemnify,
         defend and hold harmless GTE and GTE's agents, officers, employees and
         assigns from any and all claims asserted by customers of Licensee in
         any way arising out of or in connection with this Agreement or
         Licensee's Attachments, except to the extent caused by the gross
         negligence or willful misconduct on the part of GTE or GTE's agents,
         officers, employees and assigns.


                                      K-8
<PAGE>   156

19.5     Notwithstanding anything to the contrary in this Agreement, Licensee
         further shall indemnify and hold harmless GTE, its agents, officers,
         and assigns from and against any claims, liabilities, losses, damages,
         fines, penalties and costs (including, without limitation, reasonable
         attorneys' fees) whether foreseen or unforeseen, which the indemnified
         parties suffer or incur because of: (I) any discharge of Hazardous
         Waste resulting from acts or omissions of Licensee or the Licensee's
         predecessor in interest; (ii) acts or omissions of the Licensee, it
         agents, employees, contractors or representatives in connection with
         any cleanup required by law, or (iii) failure of Licensee to comply
         with Environmental, Safety and Health Laws.

19.6     In no event shall either party be liable to the other party for any
         special, consequential or indirect damages (including, without
         limitation, lost revenues and lost profits) arising out this Agreement
         or any obligation arising hereunder, whether in an action for or
         arising out of breach of contract, tort or otherwise.

19.7     Licensee shall indemnify, protect and hold harmless GTE from and
         against any and all claims for libel and slander, copyright and/or
         patent infringement arising directly or indirectly by reason of
         installation of Licensee's equipment on GTE's poles pursuant to this
         Agreement.

20.      Insurance.

         20.1     Licensee shall carry insurance, at its sole cost and expense,
                  sufficient to cover its indemnification obligations as set
                  forth in Section 19 of this Agreement. Such insurance shall
                  include, but not be limited to, coverage against liability due
                  to personal injury or death of persons in the amount of
                  $500,000 as to any one person and $1,000,000 as to any one
                  accident; coverage against liability due to property damage in
                  the amount of $500,000 as to each accident and $500,000
                  aggregate; and coverage necessary to fully protect both it and
                  GTE from all claims under any worker's compensation laws that
                  may be applicable.

         20.2     All insurance required of Licensee under this Agreement shall
                  remain in force for the entire life of this Agreement. The
                  company or companies issuing such insurance shall be approved
                  by GTE and GTE shall be named as an additional insured in each
                  such policy. Licensee shall submit to GTE certificates by each
                  insurer to the effect that the insurer has insured Licensee
                  for all potential liabilities of Licensee under this
                  Agreement, and that it will not cancel or change any policy of
                  insurance issued to Licensee except upon thirty (30) days
                  notice to GTE. In the event Licensee's insurance coverage is
                  to be canceled by reason of non-payment of premiums due, GTE
                  shall have the option of paying any amount due and Licensee
                  shall forthwith reimburse GTE the full amount paid by GTE.

         20.3     Licensee shall promptly advise GTE in writing of any and all
                  claims for damages, including, but not limited to, damage to
                  property or injury to or death of persons, allegedly arising
                  out of or in any manner related, directly or indirectly, to
                  the presence or use of Licensee's Attachments.

         20.4     Licensee shall furnish bond or satisfactory evidence of
                  contractual insurance coverage, the terms of which shall be
                  subject to GTE's approval, in the amount of ten thousand
                  dollars ($10,000) to guarantee the payment of any sums which
                  may become due to GTE for rentals, inspections or for work
                  performed by GTE for the benefit of Licensee under this
                  Agreement, including the removal of Licensee's equipment
                  pursuant to any of the provisions hereof. All bonds must
                  specify that GTE be notified thirty (30) days prior to the
                  expiration or cancellation of the policy.

                                      K-9
<PAGE>   157

21.      Taxes.

         Any state or local excise, sales, or use taxes (excluding any taxes
         levied on income) resulting from the performance of this Agreement
         shall be borne by the Party upon which the obligation for payment is
         imposed under applicable law, even if the obligation to collect and
         remit such taxes is placed upon the other Party. The collecting Party
         shall charge and collect from the obligated Party, and the obligated
         Party agrees to pay to the collecting Party, all applicable taxes,
         except to the extent that the obligated Party notifies the collecting
         Party and provides to the collecting Party appropriate documentation as
         GTE requires that qualifies the obligated Party for a full or partial
         exemption. Any such taxes shall be shown as separate items on
         applicable billing documents between the Parties. The obligated Party
         may contest the same in good faith, at its own expense, and shall be
         entitled to the benefit of any refund or recovery, provided that such
         Party shall not permit any lien to exist on any asset of the other
         Party by reason of the contest. The collecting Party shall cooperate in
         any such contest by the other Party. The other Party will indemnify the
         collecting Party from any sales or use taxes that may be subsequently
         levied on payments by the other Party by the collecting Party.

22.      Emergency Restoration Procedures.

         In the event of an emergency, restoration procedures may be affected by
         the presence of Licensee's Attachments. While GTE shall not be
         responsible for the repair of Licensee's Attachments that are damaged
         (except by mutual written agreement), GTE shall nonetheless control
         access to its poles if the restoration is to be achieved in an orderly
         fashion.

         22.1     Where GTE and Licensee are involved in emergency restorations,
                  access to GTE's poles will be controlled by GTE's Maintenance
                  District Manager or his/her on-site representative according
                  to the following guidelines:

                  22.1.1         Service Disruptions/Outages

                        (a)      In the event of service disruptions and/or
                                 outages, while exercising its right to first
                                 access, GTE shall make all reasonable efforts
                                 to grant access to as many other entities with
                                 Attachments as is reasonably safe.

                        (b)      Where simultaneous access is not possible,
                                 access will be granted by GTE on a first come,
                                 first served basis.

                  22.1.2         Service Affecting Emergencies

                        (a)      In the event of service affecting emergencies
                                 not resulting in service disruptions or
                                 outages, while exercising its right to first
                                 access, GTE shall make all reasonable efforts
                                 to grant access to as many other entities with
                                 Attachments as is reasonably safe.

                        (b)      Where GTE is unable to grant simultaneous
                                 access to all other entities with Attachments,
                                 access will granted according to the level of
                                 damage to the Attachments of each entity and
                                 the likelihood that a given level of damage
                                 will result in service disruption. Where the
                                 likelihood that a service disruption will
                                 result is not clearly discernible, access will
                                 be on a first come, first served basis.

         22.2     Without limiting any other indemnification or hold harmless
                  provisions of this Agreement, Licensee agrees that any
                  decision by GTE regarding access to Attachments, or any action

                                      K-10
<PAGE>   158

                  or failure to act by GTE, under this Section 22 shall not
                  constitute a basis for any claim by Licensee against GTE for
                  any damage to Licensee's Attachments or disruption of
                  Licensee's services, or any other direct or indirect damages
                  of any kind whatsoever incurred by Licensee.

23.      Damage Suspected to Licensee's Facilities Only.

         23.1     In the event Licensee receives information that Licensee's
                  Attachments are damaged, Licensee shall notify GTE of said
                  damage at a number to be provided later by GTE. This is a
                  24-hour, 7 days per week notification number. Licensee shall
                  provide GTE all information known to it regarding the damage
                  to Licensee's Attachments.

         23.2     In the event GTE receives notice that Licensee's Facilities
                  are damaged, GTE will notify Licensee of said damage by
                  telephone at the Licensee's emergency telephone number. GTE
                  shall provide Licensee all information known to it regarding
                  the damage to Licensee's Attachments.

         23.3     After the giving of such notice by either Licensee or GTE,
                  Licensee shall be authorized to perform emergency restoration
                  maintenance activities in connection with Licensee's
                  Attachments, subject to the provisions of this Agreement.

         23.4     Without limiting any other indemnification or hold harmless
                  provisions of this Agreement, Licensee agrees that any
                  decision by GTE regarding access to Licensee's Attachments, or
                  any action or failure to act by GTE, appropriately or
                  inappropriately, under this Section shall not be the basis for
                  any claim by Licensee against GTE for any damage to Licensee's
                  Attachments or disruption of Licensee's services, or any other
                  direct or indirect damages of any kind whatsoever incurred by
                  Licensee and Licensee shall indemnify and hold GTE harmless
                  from any such claim.

24.      Abandonment.

         Nothing in this Agreement shall prevent or be construed to prevent GTE
         from abandoning, selling, assigning or otherwise disposing of any poles
         or other GTE property used for Licensee's Attachments; provided,
         however, that GTE shall condition any such sale, assignment or other
         disposition subject to the rights granted to Licensee pursuant to this
         Agreement. GTE shall promptly notify Licensee of any proposed sale,
         assignment or other disposition of any poles or other GTE property used
         for Licensee's Attachments.

25.      Notices.

         Any written notice to be given to a party to this Agreement shall be in
         writing and given or made by means of telegram, facsimile transmission,
         certified or registered mail, express mail or other overnight delivery
         service, or hand delivery, proper postage or other charges prepaid, and
         addressed or directed to the respective parties as follows:

                To Licensee:
                                        -------------------------------
                                        -------------------------------
                                        -------------------------------


                To GTE:
                                        -------------------------------
                                        -------------------------------
                                        -------------------------------




                                      K-11
<PAGE>   159

         Any notice given by personal delivery shall be deemed to have been
         given on the day of actual delivery and, if given by registered or
         certified mail, return receipt requested, on the date of receipt       
         thereof and, if given by facsimile transmission, on the day of
         transmittal thereof if given during the normal business hours of the
         recipient and on the next business day if not given during normal
         business hours.

26.      Non-Waiver of Terms and Conditions.

         No course of dealing, course of performance or failure to enforce any
         of term, right, condition or other provision of this Agreement shall
         constitute or be construed as a waiver of any term, right or condition
         or other provision of this Agreement.

27.      Dispute Resolution.

         27.1     Except in the case of (i) a suit, action or proceeding by GTE
                  to compel Licensee to comply with its obligations to indemnify
                  GTE pursuant to this Agreement or (ii) a suit, action or
                  proceeding to compel either party to comply with the dispute
                  resolution procedures set forth in this section, the parties
                  agree to use the following procedure to resolve any dispute,
                  controversy or claim arising out of or relating to this
                  Agreement or its breach.

         27.2     At the written request of a party, each party shall designate
                  a knowledgeable, responsible representative to meet and
                  negotiate in good faith to resolve any dispute, controversy or
                  claim arising under this Agreement. The parties intend that
                  these negotiations be conducted by non-lawyer, business
                  representatives. The substance of the negotiations shall be
                  left to the discretion of the representatives. Upon mutual
                  agreement, the representatives may utilize other alternative
                  dispute resolution procedures such as mediation to assist in
                  the negotiations. Discussions and correspondence between the
                  representatives for purposes of these negotiations shall be
                  treated as confidential, undertaken for purposes of
                  settlement, shall be exempt from discovery and production, and
                  shall not be admissible in the arbitration described below or
                  in any subsequent lawsuit without the concurrence of all
                  parties. Documents identified in or provided during such
                  negotiations, which are not prepared for purposes of the
                  negotiations, shall not be so exempt and may, if otherwise
                  admissible, be admitted as evidence in any subsequent
                  proceeding.

         27.3     If a resolution of the dispute, controversy or claim is not
                  reached within sixty (60) days of the initial written request,
                  the dispute, controversy or claim shall be submitted to
                  binding arbitration by a single arbitrator pursuant to the
                  rules of the American Arbitration Association (AAA), except as
                  hereinafter provided. Discovery in any proceeding before the
                  AAA shall be controlled by the arbitrator and shall be
                  permitted to the extent set forth in this section. Parties may
                  exchange, in any combination, up to thirty-five (35) (none of
                  which may contain subparts) written interrogatories, demands
                  to produce documents and requests for admission. Each party
                  may also to take the oral deposition of one (1) witness.
                  Additional discovery may be permitted upon mutual agreement of
                  the parties. The arbitration hearing shall be commenced within
                  sixty (60) days of the demand for arbitration and shall be
                  held in the city where GTE's local offices are located. The
                  arbitrator shall rule on the dispute, controversy or claim by
                  issuing a written opinion within thirty (30) days after the
                  close of hearings. The times specified in this section may be
                  extended upon mutual agreement of the parties or by the
                  arbitrator upon a showing of good cause. Judgment upon the
                  award rendered by the arbitrator may be entered in any court
                  having jurisdiction.

         27.4     Each party shall bear its own costs, including attorneys'
                  fees, incurred in connection with any of the foregoing
                  procedures. A party seeking discovery shall reimburse the
                  responding 



                                      K-12
<PAGE>   160

                  party the cost of reproducing documents (to include search
                  time and reproduction time costs). The fees associated with
                  any arbitration, including the fees of the arbitrator, shall
                  be divided equally between the parties.

28.      Compliance With Laws.

         Notwithstanding anything to the contrary in this Agreement, each party
         shall ensure that any and all activities it undertakes pursuant to this
         Agreement shall comply with all applicable laws, including, without
         limitation, all applicable provisions of (i) workers' compensation
         laws, (ii) unemployment compensation laws, (iii) the Federal Social
         Security Law, (iv) the Fair Labor Standards Act, and (v) all laws,
         regulations, rules, guidelines, policies, orders, permits and approvals
         of any governmental authority relating to environmental matters and/or
         occupational safety.

29.      Force Majeure.

         Neither party shall have any liability for its delays or its failure in
         performance due to fire, flood, explosion, pest damage, power failures,
         strikes or labor disputes, acts of God, the Elements, war, civil
         disturbances, acts of civil or military authorities or the public
         enemy, inability to secure raw materials, transportation facilities,
         fuel or energy shortages, or other cause beyond its control.

30.      Assignment.

         30.1     The rights and obligations of Licensee under this Agreement
                  shall not be assigned, transferred or sub-licensed, in whole
                  or in part, without the prior written consent of GTE. An
                  assignment, transfer or sub-license of this Agreement by
                  Licensee shall not relieve Licensee of its obligations under
                  this Agreement. Any assignment attempted without the prior
                  written consent of GTE shall be void.

         30.2     GTE shall have the right to assign this Agreement and to
                  assign its rights and delegate its obligations and liabilities
                  under this Agreement, either in whole or in part. GTE shall
                  provide notice to Licensee of any assignment which shall state
                  the effective date thereof. Upon the effective date and to the
                  extent of the assignment, GTE shall be released and discharged
                  from all obligations and liabilities under this Agreement.

         30.3     Neither this Agreement nor any term or provision hereof, nor
                  any inclusion by reference shall be construed as being for the
                  benefit of any person or entity not a signatory hereto.

         30.4     This Agreement shall be binding upon and inure to the benefit
                  of the parties hereto and their respective successors and
                  assigns.

31.      Applicable Law.

         This Agreement, and the rights and obligations contained in it, shall  
         be governed and construed under the laws of the State of _______
         without regard to its conflicts of laws provisions.

32.      Subsequent Law.

         The terms and conditions of this Agreement shall be subject to any and
         all applicable laws, rules, regulations, guidelines, orders, or tariffs
         that are currently in force or that may be prescribed by any federal,
         state or local governmental authority. The parties agree to modify, in
         writing, the affected term(s) and condition(s) of this Agreement to
         bring them into compliance with such law, rule, regulation, guideline,
         order, or tariff. Should any term of this Agreement be determined by a

                                      K-13
<PAGE>   161

         court or other entity with competent jurisdiction to be unenforceable,
         all other terms of this Agreement shall remain in full force and
         effect.

33.      Headings.

         All headings contained in this Agreement are for convenience only and
         are not intended to affect the meaning or interpretation of any part of
         this Agreement.

34.      Entire Agreement.

         The terms and conditions of this Agreement supersede all prior oral or
         written understandings between the parties and constitute the entire
         agreement between them concerning the subject matter of this Agreement.
         There are no understandings or representations, express or implied, not
         expressly set forth in this Agreement. This Agreement shall not be
         modified or amended except by a writing signed by the party to be
         charged.

IN WITNESS WHEREOF, the parties hereto have executed this Agreement through
their authorized representatives.

For GTE:                                    For Licensee:

GTE



- ---------------------------------------     ------------------------------------
(Signature of Authorized Agent)             (Signature of Officer)
(Printed Name of Authorized Agent)          (Printed Name of Officer)
(Title)                                     (Title)
(Date)                                      (Date)


                                            ATTEST:



                                            Corporate Seal (If Applicable)


                                      K-14
<PAGE>   162


                                     EXHIBIT
                                            ----

                                 ATTACHMENT FEES





















                                      K-15
<PAGE>   163






                                   APPENDIX L
                           CONDUIT OCCUPANCY AGREEMENT


1.       Parties.

         This agreement (Agreement) is between GTE ARKANSAS INCORPORATED/GTE
         MIDWEST INCORPORATED, a State of _______________ corporation having
         its principal office at _______________ ("GTE"), and DIGITAL TELEPORT,
         INC., a corporation of the State of _______________, having its
         principal office at _______________ ("Licensee").
        
2.       Definitions.

         2.1      "GTE's conduit(s)" or "GTE conduit(s)" means any reinforced
                  passage or opening in, on, under/over or through the ground
                  capable of containing communications facilities.

         2.2      "Telecommunications Services" means the offering of
                  telecommunications for a fee directly to the public, or to
                  such classes of users as to be effectively available directly
                  to the public, regardless of the facilities used.

         2.3      "Cable Television Services" means the transmission to
                  subscribers of off-the-air pickup of broadcast signals or the
                  transmission, without separate charge, of locally originated
                  closed circuit television to the subscribers of off-the-air
                  service.

         2.4      "Conduit" or "Duct" means a single enclosed raceway used to
                  house Innerduct.

         2.5      "Innerduct," unless otherwise specified or approved by GTE,
                  shall mean a single enclosed raceway 1" or 1-1/4" in diameter,
                  placed within duct and used for housing communications
                  facilities.

         2.6      "Facilities" means all facilities, including, but not limited
                  to, cables, equipment and associated hardware, owned and
                  utilized by the Licensee which occupy an innerduct.

         2.7      "Make-Ready Work" means all work, including, but not limited
                  to, rearrangement, removal, or transfer of existing
                  facilities, placement, repair, or replacement of duct or
                  innerduct, or any other changes required to accommodate the
                  Licensee's Facilities in a conduit.

         2.8      "Manholes" and "handholes" mean subsurface enclosures which
                  personnel may enter and use for the purpose of installing,
                  operating and maintaining communications facilities.

         2.9      "Hazardous Materials" means (I) any substance, material or
                  waste now or hereafter defined or characterized as hazardous,
                  extremely hazardous, toxic or dangerous within the meaning of
                  the Comprehensive Environmental Response, Compensation and
                  Liability Act of 1980, as amended, or any similar law,
                  ordinance, statute, rule or regulation of any governmental
                  body or authority, (ii) any substance, material or waste now
                  or hereafter classified as a contaminant or pollutant under
                  any law, ordinance, statute, rule or regulation of any
                  governmental body or authority or (iii) any other substance,
                  material or waste, the manufacture, processing, distribution,
                  use, treatment, storage, placement, disposal, removal or
                  transportation of which is now or hereafter subject to
                  regulation under any law, ordinance, statute, rule or
                  regulation of any governmental body or authority.

         2.10     "Occupancy Fee" means the fee paid by Licensee to GTE per
                  linear foot for each innerduct occupied by Licensee's
                  Facilities in GTE's Conduit(s).



                                      L-1
<PAGE>   164

3.       Purpose.

         Licensee represents to GTE that Licensee has a need to occupy, place
         and maintain communications facilities within GTE's conduit(s) for the
         purpose of providing Telecommunications Service. GTE agrees to permit
         Licensee to occupy, place and maintain communications facilities within
         GTE's conduit(s) as GTE may allow pursuant to the terms of this
         Agreement.

4.       Grant of License.

         GTE grants to Licensee and Licensee accepts from GTE a non-exclusive
         revocable license to occupy, place and maintain in a designated space
         in specified GTE conduits Licensee's Facilities on the terms and
         conditions set forth herein. Licensee shall have no further right,
         title, or other interest in connection with GTE's conduit(s). GTE shall
         have the right to grant, renew or extend privileges to others not
         parties to this Agreement to occupy, place and maintain facilities in
         or otherwise use any or all of GTE's conduit(s). Nothing herein is
         intended to, nor should it be construed to require GTE to construct or
         modify any facilities not needed for its own service requirements. GTE
         grants this license in reliance on the representation of Licensee that
         Licensee intends to provide Telecommunications Service with Licensee's
         Facilities covered by this Agreement.

5.       Term.

         Subject to the termination provisions contained in this Agreement, the
         term of this Agreement shall be two (2) years from the effective date
         referenced in the first paragraph of this Agreement and shall continue
         in effect for consecutive one (1) year terms until either Party gives
         the other Party at least ninety (90) calendar days written notice of
         termination, which termination shall be effective at the end of the
         then-current term. In the event notice is given less than ninety (90)
         calendar days prior to the end of the current term, this Agreement
         shall remain in effect for ninety (90) calendar days after such notice
         is received, provided, that in no case shall the term be extended
         beyond ninety (90) calendar days after the end of the current term.

6.       Conduit Occupancy Requests.

         6.1      Upon execution of this Agreement, Licensee shall have the
                  right to submit a written Conduit Occupancy Request ("COR") to
                  GTE specifying the GTE conduits in which it desires to place
                  its Facilities. Each COR shall be in a form specified by GTE,
                  which form may be revised from time to time by GTE. CORs
                  received by GTE shall be processed on a first come, first
                  served basis. GTE will determine the availability of space for
                  Licensee's Facilities in the GTE conduit(s) specified in the
                  COR within thirty (30) Business Days of its submission. Upon
                  approval of the COR, GTE shall return a copy thereof to
                  Licensee bearing an endorsement acknowledging GTE's
                  authorization. All of Licensee's Facilities placed in GTE's
                  conduit(s) pursuant to an approved COR shall become subject to
                  all of the terms and conditions of this Agreement. Licensee
                  may submit subsequent CORs for approval by GTE as needed. All
                  of Licensee's Facilities shall be placed in innerduct unless
                  otherwise approved by GTE. No facilities of any kind shall be
                  placed in any GTE conduit(s) identified in a COR until that
                  COR has been approved by GTE.

         6.2      Licensee shall pay GTE a fee for processing a COR to
                  compensate GTE for the general administrative costs as well as
                  the actual engineering costs reasonably incurred. The fee for
                  engineering costs shall be computed by multiplying the fully
                  loaded hourly rate for an engineer times the number of hours
                  reasonably required by each engineer to inspect the GTE
                  conduits included in the COR. GTE will charge its then current
                  rates for 


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                  administrative and engineering costs, as may be changed from
                  time to time by GTE to remain consistent with prevailing
                  costs.

         6.3      Upon receiving an approved COR, Licensee shall have the right,
                  subject to the terms of this Agreement, to place and maintain
                  Licensee's Facilities described in the COR in the innerducts
                  of the GTE conduit(s) identified therein.

         6.4      In the event Make-Ready Work is necessary to accommodate
                  Licensee's Facilities, GTE shall notify Licensee of such fact
                  and provide Licensee with an estimate of the total cost of
                  such Make-Ready Work. Within fifteen (15) days after receiving
                  such notice from GTE, Licensee shall notify GTE either (1)
                  that Licensee shall pay all of the costs actually incurred to
                  perform the Make-Ready Work and shall pay the total estimated
                  amount to GTE at least ten (10) days prior to the date the
                  Make-Ready Work is to begin or (2) that it desires to cancel
                  its COR.

         6.5      Nothing herein shall confer any right upon Licensee to place
                  power cables or related power equipment in GTE conduit(s) or
                  Manholes. Licensee shall place equipment of this nature in its
                  own pull boxes outside of GTE's Conduit(s) or Manholes. Cable
                  connectors or splicing devices shall not be used by Licensee
                  in GTE's conduit(s) or innerducts.

7.       Availability of Conduit Maps.

         Existing conduit maps will be made available for viewing by Licensee
         for the purpose of pre-order planning at the GTE area engineering
         offices during normal business hours, subject to reasonable advance
         notification. While a formal written request will not be required in
         connection with the first request by Licensee to view conduit maps, GTE
         reserves the right to refuse any subsequent viewing request or require
         written justification for the request if Licensee has demonstrated that
         it does not have a good faith intention to submit a COR. If the
         availability of specific point-to-point conduits can be determined at
         the time of viewing conduit maps, maps reflecting such point-to-point
         conduits may be made available for copying. Licensee shall pay to GTE a
         fee for making such copies available sufficient to cover the general
         administrative costs incurred. IN MAKING CONDUIT MAPS AVAILABLE, GTE
         WILL BE MAKING NO EXPRESS OR IMPLIED WARRANTY REGARDING THEIR ACCURACY
         OTHER THAN THAT THEY ARE THE SAME CONDUIT MAPS USED BY GTE IN ITS
         DAY-TO-DAY OPERATIONS.

8.       Availability of Information Regarding Space In Conduits.

         GTE will provide information regarding the availability of conduit
         space within thirty (30) Business Days of a written request by
         Licensee. Because GTE will endeavor to determine available space as
         quickly as possible, a shorter interval may be experienced for requests
         of a limited scope where physical field verification is not necessary.
         In the event the thirty (30) Business Day time frame cannot be met, GTE
         shall so advise Licensee and shall seek a mutually satisfactory
         alternative response date. No representation regarding the availability
         of space shall be made in the absence of a physical field verification.

9.       Authority to Place Licensee's Facilities.

         9.1      Before Licensee places any of Licensee's Facilities in GTE's
                  conduit(s) pursuant to an approved COR, Licensee, upon
                  request, shall submit sufficient evidence to GTE of its
                  authority to maintain the Facilities to be placed in GTE's
                  conduit(s) within the public streets, highways and other
                  thoroughfares or on private property. Licensee shall be solely
                  responsible for obtaining all licenses, authorizations,
                  permits and consents from federal, 


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                  state and municipal authorities or private property owners
                  that may be required to place and maintain Licensee's
                  Facilities in GTE's conduit(s).

         9.2      GTE shall not attempt to prevent or delay the granting of any
                  rights-of-way, easements, licenses, authorizations, permits
                  and consents from any federal, state or municipal authorities,
                  or private property owners that may be required by Licensee to
                  place Licensee's Facilities in GTE's conduit(s).

         9.3      If any right-of-way, easement, license, authorization, permit
                  or consent obtained by Licensee is subsequently revoked or
                  denied for any reason, Licensee's permission to occupy GTE's
                  conduit(s) shall terminate immediately and Licensee shall
                  promptly remove Licensee's Facilities. Should Licensee fail to
                  remove Licensee's Facilities within thirty (30) days of
                  receiving notice to do so from GTE, GTE shall have the option
                  to remove Licensee's Facilities and store them in a public
                  warehouse or elsewhere at the expense of and for the account
                  of Licensee without GTE being deemed guilty of trespass or
                  conversion, and without GTE becoming liable for any loss or
                  damages to Licensee occasioned thereby. All costs incurred by
                  GTE to remove Licensee's Facilities shall be reimbursed to GTE
                  by Licensee upon demand.

         9.4      Upon notice from GTE to Licensee that the cessation of the use
                  of any portion of GTE's conduit(s) has been ordered or
                  directed by any federal, state or municipal authority, or
                  private property owner, Licensee's permission to occupy such
                  GTE conduit(s) shall terminate immediately and Licensee
                  promptly shall remove Licensee's Facilities. Should Licensee
                  fail to remove Licensee's Facilities within thirty (30) days
                  of receiving notice to do so from GTE, GTE shall have the
                  option to remove Licensee's Facilities and store them in a
                  public warehouse or elsewhere at the expense of and for the
                  account of Licensee without GTE being deemed guilty of
                  trespass or conversion, and without GTE becoming liable for
                  any loss or damages to Licensee occasioned thereby. All costs
                  incurred by GTE to remove Licensee's Facilities shall be
                  reimbursed to GTE by Licensee upon demand by GTE.

10.      Placement of Licensee's Facilities.

         10.1     Licensee shall, at its sole expense, place and maintain
                  Licensee's Facilities in GTE's conduit(s) in accordance with
                  (I) such requirements and specifications as GTE shall from
                  time to time prescribe in writing, (ii) all rules or orders
                  now in effect or that hereafter may be issued by any
                  regulatory agency or other authority having jurisdiction, and
                  (iii) all currently applicable requirements and specifications
                  of the National Electrical Safety Code, and the applicable
                  rules and regulations of the Occupational Safety And Health
                  Act. Licensee agrees to comply, at its sole risk and expense,
                  with all specifications included in Exhibits _______________
                  through _______________ hereto, as may be revised from time to
                  time by GTE.
        
         10.2     Licensee's Facilities shall be tagged at each manhole so as to
                  identify Licensee as the owner of the Facilities. The tags
                  shall be of sufficient size and lettering so as to be easily
                  read.

11.      Failure of Licensee to Occupy Conduit Space.

         Upon approval of a COR, Licensee shall have sixty (60) days in which to
         begin the placement of Licensee's Facilities in the GTE conduit(s)
         covered by the COR. If Licensee has not begun placing its Facilities
         within that sixty (60) day period, Licensee shall so advise GTE with a
         written explanation for the delay. If Licensee fails to advise GTE of
         its delay, with a written explanation 

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         therefor, or if Licensee fails to act in good faith by not making a
         bona fide effort to begin placing its Facilities within the sixty (60)
         days prescribed by this Section, the previously approved COR shall be
         deemed rescinded by GTE and Licensee shall have no further right to
         place Licensee's Facilities pursuant to that COR.

12.      Occupancy Fees.

         12.1     Licensee shall pay to GTE an Occupancy Fee, as specified in
                  Exhibit _______________ hereto, for each linear foot of
                  innerduct occupied by Licensee's Facilities in GTE's
                  conduit(s). If Licensee's Facilities occupy more than one
                  innerduct, a separate Occupancy Fee shall be paid by Licensee
                  for each innerduct occupied. The Occupancy Fee specified in
                  Exhibit _______________ hereto is the fee applicable to 1" or
                  1-1/4" diameter innerduct. GTE reserves the right to charge a
                  higher fee for innerduct of greater diameter. The Occupancy
                  Fee may be increased by GTE from time to time as permitted by
                  law upon sixty (60) days written notice to Licensee.
        
         12.2     Occupancy Fees shall become due and payable on the date a COR
                  is approved by GTE for all GTE innerducts identified in that
                  COR on a pro rata basis until the end of the calendar year and
                  thereafter on an annual basis within thirty (30) days of the
                  receipt of a statement from GTE specifying the fees to be
                  paid. Any payment after thirty (30) days shall bear interest
                  at the rate of eighteen percent (18%) per annum or the maximum
                  rate allowed by law, whichever is less.

         12.3     GTE shall maintain an inventory of the total linear footage of
                  innerduct occupied by Licensee's Facilities in GTE's
                  conduit(s) based upon the cumulative linear footage per
                  innerduct from all CORs approved by GTE. GTE may, at its
                  option, conduct a physical inventory of Licensee's Facilities
                  for purposes of determining the Occupancy Fees to be paid by
                  Licensee under this section. It shall be Licensee's sole
                  responsibility to notify GTE of any and all removals of
                  Licensee's Facilities from GTE's conduit(s). Written notice of
                  such removals (unless they are covered by Section 17 of this
                  Agreement) shall be provided to GTE at least thirty (30) days
                  prior to the removal. Each Notice of Removal shall be in a
                  form specified by GTE. Licensee shall remain liable for all
                  Occupancy Fees until Licensee's Facilities have been
                  physically removed from GTE's conduits.

13.      Modifications, Additions or Replacements of Licensee's Facilities.

         13.1     Licensee shall not modify, add to or replace Licensee's
                  Facilities in any GTE conduit(s) without first notifying GTE
                  in writing of the intended modification, addition or
                  replacement at least thirty (30) days prior to the date the
                  activity is scheduled to begin. The required notification
                  shall include: (1) the date the activity is scheduled to
                  begin, (2) a description of the planned modification, addition
                  or replacement, (3) a representation that the modification,
                  addition or replacement will not require any space other than
                  the space previously designated for Licensee's Facilities, and
                  (4) a representation that the modification, addition or
                  replacement will not impair the structural integrity of the
                  GTE conduit(s) involved.

         13.2     Should GTE determine that the modification, addition or
                  replacement specified by Licensee in its notice will require
                  more space than that allocated to Licensee or will require any
                  modification, replacement or reinforcement of the GTE
                  conduit(s) involved in order to accommodate Licensee's
                  modification, addition or replacement, GTE will so notify
                  Licensee, whereupon Licensee shall be required to submit a COR
                  in compliance with this Agreement in order to obtain
                  authorization for the modification, addition or replacement of
                  Licensee's Facilities.


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         13.3     Access to GTE's conduit(s) for repairs, modifications,
                  additions, or replacements required in emergency situations
                  shall be governed by the provisions of Section 21 of this
                  Agreement.
        
14.      Unauthorized Occupancy of GTE Conduit.

         14.1     It is agreed that a charge equal to five (5) times the amount
                  of the then current Occupancy Fee shall be paid by Licensee to
                  GTE for each unauthorized occupancy of GTE's conduit(s) by
                  Licensee. Such payment shall be deemed liquidated damages and
                  not a penalty. Licensee also shall pay GTE an Occupancy Fee
                  for each unauthorized occupancy accruing from the date the
                  unauthorized occupancy first began. In the event that the date
                  the unauthorized occupancy first began cannot be determined,
                  such date shall be deemed the date of the last physical
                  inventory made in accordance with this Agreement or, if no
                  physical inventory has been conducted, the date the first COR
                  from Licensee was approved in accordance with this Agreement.
                  Licensee also shall pay to GTE all costs incurred by GTE to
                  rearrange Licensee's Facilities that are unauthorized if such
                  rearrangement is required to safeguard GTE's facilities or to
                  accommodate the facilities of another party whose facilities
                  would not have required a rearrangement but for the presence
                  of Licensee's unauthorized facilities. Licensee also shall pay
                  to GTE all costs incurred by GTE to reinforce, replace or
                  modify any GTE conduit(s), which reinforcement, replacement or
                  modification is required as a result of the unauthorized
                  occupancy by Licensee. The Occupancy Fee referenced in this
                  subsection 14.1 shall be determined in the same manner as such
                  a fee would have been determined if the occupancy had been
                  authorized by GTE.

         14.2     For purposes of this section, an unauthorized occupancy shall
                  include, but not be limited to:

                  14.2.1      The presence of Licensee's Facilities in any GTE
                              conduit which conduit is not identified in any COR
                              approved in accordance with this Agreement;

                  14.2.2      The presence of Licensee's Facilities in any GTE
                              conduit that occupies more space than that
                              allocated to Licensee by GTE;

                  14.2.3      Licensee's Facilities that are not placed in
                              accordance with the provisions of this Agreement
                              or the appropriate COR issued pursuant to this
                              Agreement;

                  14.2.4      An addition or modification by Licensee to its
                              pre-existing Facilities in any GTE conduit that
                              impairs the structural integrity of that GTE
                              conduit.

                  14.2.5      The presence of facilities in GTE's conduit(s)
                              placed by Licensee that are owned or controlled by
                              and for the use of a party other than Licensee.

15.      Modification or Alteration GTE Conduits.

         15.1     In the event GTE plans to modify or alter any GTE conduit(s)
                  that house Licensee's Facilities, GTE shall provide Licensee
                  notice of the proposed modification or alteration at least
                  fourteen (14) days prior to the time the proposed modification
                  or alteration is scheduled to take place. Should Licensee
                  decide to modify or alter Licensee's Facilities in the GTE
                  conduit(s) to be modified or altered by GTE, Licensee shall so
                  notify GTE in 



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                  writing. In such event, Licensee shall bear a proportionate
                  share of the total costs incurred by GTE to make the GTE
                  conduit(s) accessible. Licensee's proportionate share of the
                  total cost shall be based on the ratio of the amount of new
                  space occupied by Licensee to the total amount of new space
                  occupied by all of the parties joining in the modification.

         15.2     In the event GTE moves, replaces or changes the location,
                  alignment or grade of GTE's conduit(s) ("relocation") for
                  reasons beyond GTE's control, Licensee concurrently shall
                  relocate Licensee's Facilities. Licensee shall be solely
                  responsible for the costs of the relocation of Licensee's
                  Facilities.

16.      Disclaimer of Warranties.

         EXCEPT AS SPECIFICALLY SET FORTH IN THIS AGREEMENT, GTE MAKES NO
         WARRANTIES, EXPRESS OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, ANY
         IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR a PARTICULAR
         PURPOSE.

17.      Default and Remedies.

         17.1     The occurrence of any one of the following shall be deemed a
                  Material Default by Licensee under this Agreement:

                  17.1.1       Failure by Licensee to pay any fee or other sum
                               required to be paid under the terms of this
                               Agreement and such default continues for a period
                               of five (5) days after written notice thereof to
                               Licensee;

                  17.1.2       Failure by Licensee to perform or observe any
                               other term, condition, covenant, obligation or
                               provision of this Agreement and such default
                               continues for a period of thirty (30) days after
                               written notice thereof from GTE (provided that if
                               such default is not curable within such thirty
                               (30) day period, the period will be extended if
                               Licensee commences to cure such default within
                               such thirty (30) day period and proceeds
                               diligently thereafter to effect such cure);

                  17.1.3       The filing of any tax or mechanic's lien against
                               any GTE conduit(s) which is not bonded or
                               discharged within thirty (30) days of the date
                               Licensee receives notice that such lien has been
                               filed;

                  17.1.4       Licensee's voluntary or involuntary bankruptcy;

                  17.1.5       Licensee's knowing use or maintenance of
                               Licensee's Facilities in violation of any law or
                               regulation, or in aid of any unlawful act or
                               undertaking;

                  17.1.6       If any authorization which may be required of the
                               Licensee by any governmental or private authority
                               for the placement, operation or maintenance of
                               Licensee's Facilities is denied or revoked.

         17.2     In the event of a Material Default, GTE, without any further
                  notice to the Licensee (except where expressly provided for
                  below or required by applicable law) may do any one or more
                  of the following:
        
                  17.2.1       Perform, on behalf and at the expense of
                               Licensee, any obligation of Licensee under this
                               Agreement which Licensee has failed to perform
                               and of which GTE shall have given Licensee
                               notice, the cost of which performance shall be
                               paid by Licensee to GTE upon demand;

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                       17.2.2       Terminate this Agreement by giving notice of
                                    such termination to Licensee and remove
                                    Licensee's Facilities and store them in a
                                    public warehouse or elsewhere at the expense
                                    of and for the account of Licensee without
                                    GTE being deemed guilty of trespass or
                                    conversion, and without GTE becoming liable
                                    for any loss or damages to Licensee
                                    occasioned thereby; or

                       17.2.3       Exercise any other legal or equitable right
                                    or remedy which GTE may have.

                  17.3 Any costs and expenses incurred by GTE (including,
                       without limitation, reasonable attorneys' fees) in
                       enforcing this Agreement shall be paid to GTE by Licensee
                       upon demand.

                  17.4 Upon termination of this Agreement by GTE, Licensee shall
                       remain liable to GTE for any and all fees, other payments
                       and damages which may be due or sustained prior to such
                       termination, all reasonable costs, fees and expenses,
                       including, without limitation, reasonable attorneys' fees
                       incurred by GTE in pursuit of its remedies hereunder, and
                       additional liquidated damages which shall be an amount
                       equal to one full year of Occupancy Fees.

                  17.5 All rights and remedies of GTE set forth in this
                       Agreement shall be cumulative and none shall exclude any
                       other right or remedy, now or hereafter allowed by or
                       available under any statute, ordinance, rule of court, or
                       the common law, either at law or in equity, or both.

18.      Indemnification.

         18.1     Licensee shall compensate GTE for the full actual loss, damage
                  or destruction of GTE's property that in any way arises from
                  or is related to this Agreement or activities undertaken
                  pursuant to this Agreement (including, without limitation, the
                  installation, construction, operation or maintenance of
                  Licensee's Facilities).

         18.2     Licensee will further indemnify, defend and hold harmless GTE
                  and GTE's agents, officers, employees and assigns, from any
                  and all losses, damages, costs, expenses (including, without
                  limitation, reasonable attorneys' fees), statutory fines or
                  penalties, actions or claims for personal injury (including
                  death), damage to property, or other damage or financial loss
                  of whatever nature in any way arising out of or connected with
                  this Agreement or activities undertaken pursuant to this
                  Agreement (including, without limitation, the installation,
                  construction, operation or maintenance of Licensee's
                  Facilities), except to the extent caused by the negligence or
                  willful misconduct on the part of GTE or GTE's agents,
                  officers, employees and assigns. Licensee further indemnifies
                  GTE from subsequent taxes and fees that may be levied by
                  municipalities ROWs in association with these agreements. Such
                  fees that are levied would be in addition to the
                  attachment/occupancy fees reflected in this Agreement.
                  Licensee expressly assumes all liability for actions brought
                  against GTE and GTE's agents, officers, employees and assigns,
                  by Licensee's agents, officers or employees and Licensee
                  expressly waives any immunity from the enforcement of this
                  indemnification provision that might otherwise be provided by
                  workers' compensation law or by other state or federal laws.

         18.3     Without limiting any of the foregoing, Licensee assumes all
                  risk of, and agrees to relieve GTE of any and all liability
                  for, loss or damage (and the consequences of loss or damage)
                  to any of Licensee's Facilities placed in any GTE conduit(s)
                  and any other financial loss sustained by Licensee, whether
                  caused by fire, extended coverage perils, or other casualty,

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                  except to the extent caused by the negligence or willful
                  misconduct on the part of GTE or GTE's agents, officers,
                  employees and assigns.

         18.4     Without limiting the foregoing, Licensee expressly agrees to
                  indemnify, defend and hold harmless GTE and GTE's agents,
                  officers, employees and assigns from any and all claims
                  asserted by customers of Licensee in any way arising out of or
                  in connection with this Agreement or Licensee's Attachments,
                  except to the extent caused by the negligence or willful
                  misconduct on the part of GTE or GTE's agents, officers,
                  employees and assigns.

         18.5     Notwithstanding anything to the contrary in this Agreement,
                  Licensee further shall indemnify and hold harmless GTE, its
                  agents, officers, employees and assigns from and against any
                  claims, liabilities, losses, damages, fines, penalties and
                  costs (including, without limitation, reasonable attorneys'
                  fees) whether foreseen or unforeseen, which the indemnified
                  parties suffer or incur because of: (I) any discharge of
                  Hazardous Waste resulting from acts or omissions of Licensee
                  or the Licensee's predecessor in interest; (ii) acts or
                  omissions of the Licensee, it agents, employees, contractors
                  or representatives in connection with any cleanup required by
                  law, or (iii) failure of Licensee to comply with
                  Environmental, Safety and Health Laws.

         18.6     In no event shall GTE be liable to Licensee for any special,
                  consequential or indirect damages (including, without
                  limitation, lost revenues and lost profits) arising out this
                  Agreement or any obligation arising hereunder, whether in an
                  action for or arising out of breach of contract, tort or
                  otherwise.

         18.7     Licensee shall indemnify, protect and hold harmless GTE from
                  and against any and all claims for libel and slander,
                  copyright and/or patent infringement arising directly or
                  indirectly by reason of installation of Licensee's equipment
                  in GTE's Ducts pursuant to this Agreement.

19.      Insurance.

         19.1     Licensee shall carry insurance, at its sole cost and expense,
                  sufficient to cover its indemnification obligations as set
                  forth in Section 18 of this Agreement. Such insurance shall
                  include, but not be limited to, coverage against liability due
                  to personal injury or death of persons in the amount of
                  $500,000 as to any one person and $1,000,000 as to any one
                  accident; coverage against liability due to property damage in
                  the amount of $500,000 as to each accident and $500,000
                  aggregate; and coverage necessary to fully protect both it and
                  GTE from all claims under any worker's compensation laws that
                  may be applicable.

         19.2     All insurance required of Licensee under this Agreement shall
                  remain in force for the entire life of this Agreement. The
                  company or companies issuing such insurance shall be approved
                  by GTE and GTE shall be named as an additional insured in each
                  such policy. Licensee shall submit to GTE certificates by each
                  insurer to the effect that the insurer has insured Licensee
                  for all potential liabilities of Licensee under this
                  Agreement, and that it will not cancel or change any policy of
                  insurance issued to Licensee except upon thirty (30) days
                  notice to GTE. In the event Licensee's insurance coverage is
                  to be canceled by reason of non-payment of premiums due, GTE
                  shall have the option of paying any amount due and Licensee
                  shall forthwith reimburse GTE the full amount paid by GTE.

         19.3     Licensee shall promptly advise GTE in writing of any and all
                  claims for damages, including, but not limited to, damage to
                  property or injury to or death of persons, allegedly arising
                  out of or in any manner related, directly or indirectly, to
                  the presence or use of Licensee's Facilities.


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         19.4     Licensee shall furnish bond or satisfactory evidence of
                  contractual insurance coverage, the terms of which shall be
                  subject to GTE's approval, in the amount of ten thousand
                  dollars ($10,000) to guarantee the payment of any sums which
                  may become due to GTE for rentals, inspections or for work
                  performed by GTE for the benefit of Licensee under this
                  Agreement, including the removal of Licensee's equipment
                  pursuant to any of the provisions hereof. All bonds must
                  specify that the GTE be notified thirty (30) days prior to the
                  expiration or cancellation of the policy.

20.      Taxes.

         Any state or local excise, sales, or use taxes (excluding any taxes
         levied on income) resulting from the performance of this Agreement
         shall be borne by the Party upon which the obligation for payment is
         imposed under applicable law, even if the obligation to collect and
         remit such taxes is placed upon the other Party. The collecting Party
         shall charge and collect from the obligated Party, and the obligated
         Party agrees to pay to the collecting Party, all applicable taxes,
         except to the extent that the obligated Party notifies the collecting
         Party and provides to the collecting Party appropriate documentation as
         GTE requires that qualifies the obligated Party for a full or partial
         exemption. Any such taxes shall be shown as separate items on
         applicable billing documents between the Parties. The obligated Party
         may contest the same in good faith, at its own expense, and shall be
         entitled to the benefit of any refund or recovery, provided that such
         Party shall not permit any lien to exist on any asset of the other
         Party by reason of the contest. The collecting Party shall cooperate in
         any such contest by the other Party. The other Party will indemnify the
         collecting Party from any sales or use taxes that may be subsequently
         levied on payments by the other Party by the collecting Party.

21.      Emergency Restoration Procedures.

         In the event of an emergency, restoration procedures may be affected by
         the presence of Licensee's Facilities in GTE's conduit(s). While GTE
         shall not be responsible for the repair of Licensee's Facilities that
         are damaged (except by mutual written agreement), GTE shall nonetheless
         control access to its Conduits if the restoration is to be achieved in
         an orderly fashion.

         21.1     Where GTE and Licensee are involved in emergency restorations,
                  access to GTE's conduit(s) will be controlled by GTE's
                  Maintenance District Manager or his/her on-site representative
                  according to the following guidelines:

                  21.1.1       Service Disruptions/Outages

                        (a)    In the event of service disruptions and/or
                               outages, while exercising its right to first
                               access, GTE shall make all reasonable efforts to
                               grant access to as many other entities with
                               facilities in GTE's conduit(s) as is reasonably
                               safe.

                        (b)    Where simultaneous access is not possible, access
                               will be granted by GTE on a first come, first
                               served basis.

                  21.1.2       Service Affecting Emergencies

                        (a)    In the event of service affecting emergencies not
                               resulting in service disruptions or outages,
                               while exercising its right to first access, GTE
                               shall make all reasonable efforts to grant access
                               to as many other entities with facilities in
                               GTE's conduit(s) as is reasonably safe.
    

                                      L-10
<PAGE>   173

                         (b)   Where GTE is unable to grant simultaneous access
                               to all other entities with facilities in GTE's
                               conduit(s), access will granted according to the
                               level of damage to the facilities of each entity
                               and the likelihood that a given level of damage
                               will result in service disruption. Where the
                               likelihood that a service disruption will result
                               is not clearly discernible, access will be on a
                               first come, first served basis.

         21.2     Without limiting any other indemnification or hold harmless
                  provisions of this Agreement, Licensee agrees that any
                  decision by GTE regarding access to Licensee's Facilities, or
                  any action or failure to act by GTE under this Section 21
                  shall not constitute a basis for any claim by Licensee against
                  GTE for any damage to Licensee's Facilities or disruption of
                  Licensee's services, or any other direct or indirect damages
                  of any kind whatsoever incurred by Licensee.

22.      Damage Suspected to Licensee's Facilities Only.

         22.1     In the event Licensee receives information that Licensee's
                  Facilities are damaged, Licensee shall notify GTE of said
                  damage at [---TELEPHONE NUMBER---]. This is a 24-hour, 7 days
                  per week notification number. Licensee shall provide GTE all
                  information known to it regarding the damage to Licensee's
                  Facilities.

         22.2     In the event GTE receives notice that Licensee's Facilities
                  are damaged, GTE will notify Licensee of said damage by
                  telephone at the Licensee's emergency telephone number. GTE
                  shall provide Licensee all information known to it regarding
                  the damage to Licensee's Facilities.

         22.3     After the giving of such notice by either Licensee or GTE,
                  Licensee shall be authorized to perform emergency restoration
                  maintenance activities in connection with Licensee's
                  Facilities, subject to the provisions of this Agreement.

         22.4     Without limiting any other indemnification or hold harmless
                  provisions of this Agreement, Licensee agrees that any
                  decision by GTE regarding access to Licensee's facilities, or
                  any action or failure to act by GTE, appropriately or
                  inappropriately, under this Section shall not be the basis for
                  any claim by Licensee against GTE for any damage to Licensee's
                  Facilities or disruption of Licensee's services, or any other
                  direct or indirect damages of any kind whatsoever incurred by
                  Licensee and Licensee shall indemnify and hold GTE harmless
                  from any such claim.

23.      Access to GTE's Manholes/Handholes.

         23.1     GTE will allow Licensee to audit manholes/handholes that are
                  included in any COR submitted to GTE to confirm usability.
                  Licensee shall give GTE at least fourteen (14) days advance
                  written notice of its desire to audit and shall obtain all
                  authorizations from appropriate authorities required to open
                  the manholes/handholes. GTE shall have the right to have a GTE
                  employee or agent present when its manholes/handholes are
                  being opened. Such GTE employee or agent shall have the
                  authority to suspend Licensee's activities in and around GTE's
                  manholes/handholes if, in the sole discretion of said employee
                  or agent, any hazardous conditions arise or any unsafe
                  practices are being followed by Licensee's employees, agents,
                  or contractors. Licensee agrees to reimburse GTE the cost of
                  having GTE's employee or agent present. Such charge shall be
                  GTE's fully loaded labor rates then in effect.


                                      L-11
<PAGE>   174

         23.2     For purposes other than to audit usability, GTE's
                  manholes/handholes shall be opened only as permitted by GTE
                  and only after Licensee has obtained all necessary
                  authorizations from appropriate authorities to open
                  manholes/handholes and conduct work operations therein. GTE
                  shall have the right to have a GTE employee or agent present
                  at any site at which its manholes/handholes are being opened.
                  Such GTE employee or agent shall have the authority to suspend
                  Licensee's work operations in and around GTE's
                  manholes/handholes if, in the sole discretion of said employee
                  or agent, any hazardous conditions arise or any unsafe
                  practices are being followed by Licensee's employees, agents,
                  or contractors. Licensee agrees to reimburse GTE the cost of  
                  having GTE's employee or agent present. Such charge shall be
                  GTE's fully loaded labor rates then in effect. The presence
                  of GTE's authorized employee or agent shall not relieve
                  Licensee of its responsibility to conduct all of its work
                  operations in and around GTE's conduit(s) in a safe and
                  workmanlike manner, in accordance with the terms of this
                  Agreement.

24.      Abandonment.

         Nothing in this Agreement shall prevent or be construed to prevent GTE
         from abandoning, selling, assigning or otherwise disposing of any GTE
         conduit(s) or other GTE property used in connection with Licensee's
         Facilities; provided, however, that GTE shall condition any such sale,
         assignment or other disposition subject to the rights granted to
         Licensee pursuant to this Agreement. GTE shall promptly notify Licensee
         of any proposed sale, assignment or other disposition of any GTE
         conduit(s) or other GTE property used in connection with Licensee's
         Facilities.

25.      Notices.

         Any written notice to be given to a party to this Agreement shall be in
         writing and given or made by means of telegram, facsimile transmission,
         certified or registered mail, express mail or other overnight delivery
         service, or hand delivery, proper postage or other charges prepaid, and
         addressed or directed to the respective parties as follows:

                     To Licensee:
                                        -------------------------------
                                        -------------------------------
                                        -------------------------------


                     To GTE:
                                        -------------------------------
                                        -------------------------------
                                        -------------------------------



         Any notice given by personal delivery shall be deemed to have been
         given on the day of actual delivery and, if given by registered or
         certified mail, return receipt requested, on the date of receipt
         thereof and, if given by facsimile transmission, on the day of
         transmittal thereof if given during the normal business hours of the
         recipient and on the next business day if not given during normal
         business hours.

26.      Non-Waiver of Terms and Conditions.

         No course of dealing, course of performance or failure to enforce any
         of term, right, condition or other provision of this Agreement shall
         constitute or be construed as a waiver of any term, right or condition
         or other provision of this Agreement.



                                      L-12
<PAGE>   175

27.      Dispute Resolution.

         27.1     Except in the case of (i) a suit, action or proceeding by GTE
                  to compel Licensee to comply with its obligations to indemnify
                  GTE pursuant to this Agreement or (ii) a suit, action or
                  proceeding to compel either party to comply with the dispute
                  resolution procedures set forth in this section, the parties
                  agree to use the following procedure to resolve any dispute,
                  controversy or claim arising out of or relating to this
                  Agreement or its breach.

         27.2     At the written request of a party, each party shall designate
                  a knowledgeable, responsible representative to meet and
                  negotiate in good faith to resolve any dispute, controversy or
                  claim arising under this Agreement. The parties intend that
                  these negotiations be conducted by non-lawyer, business
                  representatives. The substance of the negotiations shall be
                  left to the discretion of the representatives. Upon mutual
                  agreement, the representatives may utilize other alternative
                  dispute resolution procedures such as mediation to assist in
                  the negotiations. Discussions and correspondence between the
                  representatives for purposes of these negotiations shall be
                  treated as confidential, undertaken for purposes of
                  settlement, shall be exempt from discovery and production, and
                  shall not be admissible in the arbitration described below or
                  in any subsequent lawsuit without the concurrence of all
                  parties. Documents identified in or provided during such
                  negotiations, which are not prepared for purposes of the
                  negotiations, shall not be so exempt and may, if otherwise
                  admissible, be admitted as evidence in any subsequent
                  proceeding.

         27.3     If a resolution of the dispute, controversy or claim is not
                  reached within sixty (60) days of the initial written request,
                  the dispute, controversy or claim shall be submitted to
                  binding arbitration by a single arbitrator pursuant to the
                  rules of the American Arbitration Association (AAA), except as
                  hereinafter provided. Discovery in any proceeding before the
                  AAA shall be controlled by the arbitrator and shall be
                  permitted to the extent set forth in this section. Parties may
                  exchange, in any combination, up to thirty-five (35) (none of
                  which may contain subparts) written interrogatories, demands
                  to produce documents and requests for admission. Each party
                  may also to take the oral deposition of one (1) witness.
                  Additional discovery may be permitted upon mutual agreement of
                  the parties. The arbitration hearing shall be commenced within
                  sixty (60) days of the demand for arbitration and shall be
                  held in the city where GTE's local offices are located. The
                  arbitrator shall rule on the dispute, controversy or claim by
                  issuing a written opinion within thirty (30) days after the
                  close of hearings. The times specified in this section may be
                  extended upon mutual agreement of the parties or by the
                  arbitrator upon a showing of good cause. Judgment upon the
                  award rendered by the arbitrator may be entered in any court
                  having jurisdiction.

         27.4     Each party shall bear its own costs, including attorneys'
                  fees, incurred in connection with any of the foregoing
                  procedures. A party seeking discovery shall reimburse the
                  responding party the cost of reproducing documents (to include
                  search time and reproduction time costs). The fees associated
                  with any arbitration, including the fees of the arbitrator,
                  shall be divided equally between the parties.

28.      Compliance With Laws.

         Notwithstanding anything to the contrary in this Agreement, Licensee
         shall ensure that any and all activities it undertakes pursuant to this
         Agreement shall comply with all applicable laws, including, without
         limitation, all applicable provisions of (i) workers' compensation
         laws, (ii) unemployment compensation laws, (iii) the Federal Social
         Security Law, (iv) the Fair Labor Standards Act, and (v) all laws,
         regulations, rules, guidelines, policies, orders, permits and 


                                      L-13
<PAGE>   176

         approvals of any governmental authority relating to environmental
         matters and/or occupational safety.

29.      Force Majeure.

         Except for payment of the Occupancy Fees and other amounts payable
         under this Agreement, neither party shall have any liability for its
         delays or its failure in performance due to fire, flood, explosion,
         pest damage, power failures, strikes or labor disputes, acts of God,
         the Elements, war, civil disturbances, acts of civil or military
         authorities or the public enemy, inability to secure raw materials,
         transportation facilities, fuel or energy shortages, or other cause
         beyond its control.

30.      Assignment.

         30.1     The rights and obligations of Licensee under this Agreement
                  shall not be assigned, transferred or sub-licensed, in whole
                  or in part, without the prior written consent of GTE. An
                  assignment, transfer or sub-license of this Agreement by
                  Licensee shall not relieve Licensee of its obligations under
                  this Agreement. Any assignment attempted without the prior
                  written consent of GTE shall be void.

         30.2     GTE shall have the right to assign this Agreement and to
                  assign its rights and delegate its obligations and liabilities
                  under this Agreement, either in whole or in part. GTE shall
                  provide notice to Licensee of any assignment which shall state
                  the effective date thereof. Upon the effective date and to the
                  extent of the assignment, GTE shall be released and discharged
                  from all obligations and liabilities under this Agreement.

         30.3     Neither this Agreement nor any term or provision hereof, nor
                  any inclusion by reference shall be construed as being for the
                  benefit of any person or entity not a signatory hereto.

         30.4     This Agreement shall be binding upon and inure to the benefit
                  of the parties hereto and their respective successors and
                  assigns.

31.      Applicable Law.

         This Agreement, and the rights and obligations contained in it, shall
         be governed and construed under the laws of the State of _______
         without regard to its conflicts of laws provisions.

32.      Subsequent Law.

         The terms and conditions of this Agreement shall be subject to any and
         all applicable laws, rules, regulations or guidelines that subsequently
         may be prescribed by any federal, state or local governmental
         authority. To the extent required by any such subsequently prescribed
         law, rule, regulation or guideline, the parties agree to modify, in
         writing, the affected term(s) and condition(s) of this Agreement to
         bring them into compliance with such law, rule, regulation or
         guideline. Should any term of this Agreement be determined by a court
         or other entity with competent jurisdiction to be unenforceable, all
         other terms of this Agreement shall remain in full force and effect.

33.      Headings.

         All headings contained in this Agreement are for convenience only and
         are not intended to affect the meaning or interpretation of any part of
         this Agreement.



                                      L-14
<PAGE>   177

34.      Entire Agreement.

         The terms and conditions of this Agreement supersede all prior oral or
         written understandings between the parties and constitute the entire
         agreement between them concerning the subject matter of this Agreement.
         There are no understandings or representations, express or implied, not
         expressly set forth in this Agreement. This Agreement shall not be
         modified or amended except by a writing signed by the party to be
         charged.

IN WITNESS WHEREOF, the parties hereto have executed this Agreement through
their authorized representatives.

For GTE:                                       For Licensee:

GTE




- -----------------------------------------      ---------------------------------
(Signature of Authorized Agent)                (Signature of Officer)
(Printed Name of Authorized Agent)             (Printed Name of Officer)
(Title)                                        (Title)
(Date)                                         (Date)


                                               ATTEST:



                                               Corporate Seal (If Applicable)






                                      L-15
<PAGE>   178


                                     EXHIBIT
                                            ----
                                 OCCUPANCY FEES





























                                      L-16
<PAGE>   179

                                   APPENDIX M
                  RECIPROCAL COMPENSATION FOR CALL TERMINATION

1.       This document describes the reciprocal compensation arrangements
         between DTI and GTE for Local Tariff, Toll and Switched Access
         Services. The Parties shall compensate each other for transport and
         termination of such traffic at the rates provided in Appendix D and/or
         the appropriate Parties' Switched Access Tariff.

2.       Compensation for Call Termination

         A.       Reciprocal compensation does not apply in a resale 
                  environment.

         B.       The following compensation terms shall apply in all cases
                  where DTI purchases GTE's unbundled Local Switching:

                  1.       For local intra-switch calls between lines connected
                           to GTE's switch where DTI has purchased GTE's
                           unbundled Local Switching, the Parties agree to
                           impose no call termination charges on each other.
                           GTE's Local Switching charge will apply as described
                           below where the call is:

                           (a)      Originated by DTI's customer and completed
                                    to a GTE customer:

                                    (1)     (For use of the local switch): Local
                                            Switching charge at the originating
                                            office will apply to DTI.

                           (b)      Originated by DTI's customer and completed
                                    to the customer of a Third Party LEC (not
                                    affiliated with DTI) using GTE's unbundled
                                    Local Switching:

                                    (1)     (For use of the local switch): Local
                                            Switching charge at the originating
                                            office will apply to DTI.

                           (c)      Originated by DTI's customer and completed
                                    to another DTI's customer using GTE's
                                    unbundled Local Switching.

                                    (1)     (For use of the local switch): Local
                                            Switching charge at the originating
                                            office will apply to DTI.

                           (d)      Originated by a GTE customer and terminated
                                    to DTI's customer using GTE's unbundled
                                    Local Switching.

                                    (1)     No Local Switching charge will
                                            apply.

                           (e)      Originated by the customer of a Third Party
                                    LEC (not affiliated with DTI) using GTE's
                                    unbundled Local Switching and terminated to
                                    DTI's customers using GTE's unbundled Local
                                    Switching.

                                    (1)     No Local Switching charge will apply
                                            to DTI.

2.       For Local inter-switch calls where DTI has purchased GTE's unbundled
         Local Switching.

         GTEs charges will apply to DTI described below where the call is:


                                      M-1
<PAGE>   180

         (a)      Originated from DTI's end-user customer using GTE's unbundled
                  Local Switching and completed to a GTE customer.

                  (1)   (For use of the local switch): Local Switching charge at
                        the originating office.

                  (2)   a mileage-based transport charge will apply when DTI
                        uses GTE's transport.

                  (3)   (For call termination): Charges for local
                        interconnection/call termination, when applicable.

         (b)      Originated from DTI's customer using GTE's unbundled Local
                  Switching and completed to a Third Party LEC (not affiliated
                  with DTI) customer using GTE's unbundled Local Switching.

                  (1)   (For use of the local switch): Local Switching charge at
                        the originating office.

                  (2)   a mileage-based transport charge will apply when DTI
                        uses GTE's transport.

         (c)      Originated from DTI's customer using GTE's unbundled Local
                  Switching and completed to the interconnected network of a
                  Third Party LEC (not affiliated with DTI).

                  (1)   (For use of the local switch): Local Switching charge at
                        the originating office.

                  (2)   a mileage-based transport charge will apply when DTI
                        uses GTE's transport, and mileage shall be measured
                        between the originating office and the POI of the Third
                        Party's network.

         (d)      Originated from DTI's customer using GTE's unbundled Local
                  Switching and completed to DTI's customer using GTE's
                  unbundled Local Switching.

                  (1)   (For use of the local switch): Local Switching charge at
                        the originating office.

                  (2)   a mileage-based transport charge will apply when DTI
                        uses GTE's transport.

                  (3)   (For use of the local switch): Local Switching charge at
                        the terminating office.

         (d)      Originated by a GTE customer and terminated to DTI's customer
                  using GTE's unbundled Local Switching.

                  (1)   (For use at local switch): Local Switching Charge at the
                        terminating office.

                                      M-2
<PAGE>   181

                  (2)   (For call termination): DTI shall charge GTE for local
                        interconnection/call termination, when applicable.

         (f)      Originated by a customer of a third-party LEC (not affiliated
                  with DTI) using GTE's unbundled Local Switching and terminated
                  to DTI's customer using GTE's unbundled Local Switching.

                  (1)   (For use of the local switch): Local Switching charge at
                        the terminating office.

         (g)      Originated by a customer of the interconnected network of a
                  third-party LEC (not affiliated with DTI) and terminated to
                  DTI's customer using GTE's unbundled Local Switching.

                  (1)   (For use of the local switch): Local Switching charge at
                        the terminating office.

3.       For intraLATA toll calls where DTI has purchased GTE's unbundled Local
         Switching, charges per Unbundled Network Element pricing shall apply as
         follows:

         a.  Originated by DTI's customer and completed to a GTE customer.

             1.   (For use of the local switch): Local Switching charge plus RIC
                  and CCLC (Residual Interconnection Charge) at the originating
                  office.

             2.   Shared transport charge between the two offices will apply
                  when DTI uses GTE's transport.

             3.   (For call termination): End Office Switching charge at the
                  terminating office (Switched Access Rate).

             4.   RIC and CCLC at the terminating office.

         B.  Originated by DTI's customer and completed to the customer of a
             third-party LEC (not affiliated with DTI) using GTE's unbundled
             Local Switching in a distant end office.

             1.   (For use of the local switch): Local Switching charge plus RIC
                  and CCLC at the originating office.

             2.   Shared transport charge between the two offices will apply
                  when DTI uses GTE's transport.

         C.  Originated by DTI customer and completed to the network of a
             third-party LEC (not affiliated with DTI) interconnected with GTE's
             network.

             1.   (For use of the local switch): Local Switching charge, plus
                  RIC and CCLC, at the originating office.

             2.   Common transport charge will apply when DTI uses GTE's
                  transport, and mileage shall be measured between the
                  originating office and the POI of the Third Party's network.

             3.   Tandem Switching, where applicable.


                                      M-3
<PAGE>   182

         D.  Originated by DTI's customer and completed by another of DTI's
             customers being served through GTE's unbundled Local Switching in a
             distant office.

             1.   (For use of the local switch): Local Switching charge plus RIC
                  and CCLC at the originating office.

             2.   Shared transport charge between the two offices will apply
                  when DTI uses GTE's transport.

             3.   (For use of the local switch): Local Switching charge plus RIC
                  and CCLC at the terminating office.

         E.  Originated by a GTE customer and terminated to DTI's customer using
             GTE's unbundled Local Switching.

             1.   (For use of the local switch): Local Switching charge plus RIC
                  and CCLC at the terminating office.

             2.   (For call termination): DTI will charge GTE Local Switching at
                  the terminating office (Switched Access Rate).

             3.   (For call termination): DTI will charge GTE NIC and CCLC at
                  the terminating office.

         F.  Originated by the customer of a third-party LEC (not affiliated
             with DTI) using GTE's unbundled Local Switching in a distant end
             office and terminated to DTI's customer using GTE's unbundled Local
             Switching.

             1.   (For use of the local switch): Local Switching charge plus RIC
                  and CCLC at the terminating office.

         G.  Originated by a customer of the network of a third-party LEC (not
             affiliated with DTI) interconnected with GTE's network and
             terminated to DTI's customer using GTE's unbundled Local Switching.

             1.   (For use of the local switch): Local Switching charge plus RIC
                  and CCLC at the terminating office.

4.       For intrastate Switched Access calls where DTI's is using GTE's 
         unbundled Local Switching for calls originated from or terminated to 
         an IXC for completion:

         a.  For calls originated from DTI's customer to DTI's own IXC switch 
             (or that of an affiliate) for completion.

             1.   (For use of the local switch): Local Switching charge at the
                  terminating office.

             2.   Originating RIC and CCLC.

             3.   GTE will charge DTI's IXC affiliate the following Switched
                  Access elements on a meet-point basis:

                  (a) Local Transport;

                  (b) Tandem Switching.

                                      M-4
<PAGE>   183

             4.   DTI will charge DTI's IXC affiliate the following Switched
                  Access elements on a meet-point basis:

                  (a) Originating RIC and CCLC;

                  (b) Local Switching.

         B.  For calls originating from DTI's customer to an IXC's switch not 
             affiliated with DTI.

             1.   (For use of the local switch): DTI's customer to an IXC's
                  switch not affiliated with DTI.

             2.   Originating RIC and CCLC.

             3.   GTE shall charge the non-affiliated IXC for the following
                  originating Switched Access on a meet-point basis:

                  (a) Local Transport;

                  (b) Tandem Switching.

             4.   DTI will charge the non-affiliated IXC for the following
                  Switched Access elements on a meet-point basis:

                  (a) Originating RIC and CCLC;

                  (b) Local Switching.

         C.  For calls terminating to DTI's end-user customer from DTI's own IXC
             switch (or that of an affiliate) for completion.

             1.   (For use of the local switch): Local Switching charge at the
                  terminating office.

             2.   Terminating RIC and CCLC.

             3.   GTE will charge DTI's IXC (affiliate) the following Switched
                  Access elements on a meet-point basis:

                  (a) Local Transport;

                  (b) Tandem Switching.

             4.   DTI will charge DTI's IXC (affiliate) for the following
                  Switched Access elements on a meet-point basis:

                  (a) Terminating RIC and CCLC.

                  (b) Local Switching. 

         D.  For calls terminating to DTI's customer from an IXC switch not 
             affiliated with DTI.

             1.   (For use of the local switch): Local Switching charge at the
                  terminating office.



                                      M-5
<PAGE>   184

             2.   Terminating RIC and CCLC.

             3.   GTE shall charge the IXC for the following terminating 
                  Switched Access on a meet-point basis:

                  (a) Local Transport;

                  (b) Tandem Switching.

             4.   DTI will charge IXC for the following Switched Access elements
                  on a meet-point basis:

                  (a) Terminating RIC and CCLC;

                  (b) Local Switching.

5.       For interstate Switched Access calls where DTI is using GTE's unbundled
         Local Switching for calls originated from or terminated to an IXC for
         completion:

         a.  For calls originated from DTI's customer to DTI's own IXC switch
             (or that of an affiliate) for completion.

             1.   (For use of the local switch): Local Switching charge at the
                  originating office.

             2.   Originating Residual Interconnection Charge (RIC) and CCL.

             3.   GTE shall charge DTI's IXC affiliate for the following
                  originating Switched Access on a meet-point basis:

                  (a) Local Transport;

                  (b) Tandem Switching.

             4.   DTI will charge DTI's IXC affiliate the following Switched
                  Access elements on a meet-point basis:

                  (a) Originating RIC;

                  (b) Originating CCLC;

                  (c) Local Switching.

         B.  For calls originated from DTI's customer to an IXC's switch not
             affiliated to DTI.

             1.   (For use of the local switch): Local Switching charge at the
                  terminating office.

             2.   Originating RIC and CCLC.

             3.   GTE shall charge the IXC for the following originating
                  Switched Access on a meet-point basis:

                  (a) Local Transport;


                                      M-6
<PAGE>   185

                  (b) Tandem Switching.

             4.   DTI will charge IXC the following Switched Access elements
                  on a meet-point basis:

                  (a) Originating RIC;

                  (b) Originating CCLC;

                  (c) Local Switching.

         C.  For calls terminating to DTI's customer for DTI's own IXC switch 
             (or that of an affiliate) for completion.

             1.   (For use of the local switch): Local Switching charge at the
                  terminating office.

             2.   Terminating RIC and CCL.

             3.   GTE will charge DTI's IXC (affiliate) the following Switched
                  Access elements on a meet-point basis:

                  (a) Local Transport;

                  (b) Tandem Switching.

             4.   DTI will charge DTI's IXC affiliate the following Switched
                  Access elements on a meet-point basis:

                  (a) Terminating RIC;

                  (b) Terminating CCLC;

                  (c) Local Switching.

         D.  For calls terminating to DTI's customer from an IXC switch not
             affiliated with DTI.

             1.   (For use of the local switch): Local Switching charge at the
                  terminating office.

             2.   Terminating RIC and CCL.

             3.   GTE will charge the non-affiliated IXC for the following
                  terminating Switched Access on a meet-point basis:

                  (a) Local Transport;

                  (b) Tandem Switching.

             4.   DTI will charge IXC the following Switched Access elements on
                  a meet-point basis:

                  (a) Terminating RIC;

                  (b) Terminating CCLC;

                  (c) Local Switching.


                                      M-7
<PAGE>   186








                                  APPENDIX 46A

                                    GTE TERMS

                       GTE/DTI OPT-IN NEGOTIATION ISSUES



Pursuant to Section 46 of Article III to the GTE/Digital Teleport, Inc.
Interconnection Agreement and subject to all of the terms and conditions of that
Section, each of the following rates or terms may be replaced or supplemented by
the correlative rate or term set forth in the Arbitrating CLEC Terms listed in
Appendix 46, as and when provided in Section 46 and only until, as long as, and
under the conditions prescribed by Section 46.

1.       Substitute the Avoided Cost Discount in Appendix F with the resale
         discount rate(s) that may be indicated in Appendix 46B.

2.       Substitute the list of services excluded from resale under Section 2.2
         of Article VI to remove those services to be made available for resale
         that may be indicated in Appendix 46B.

3.       Substitute the list of services available for resale but not at a
         discount under Section 2.3 if Article VI to remove those services to be
         made available for resale at a discount that may be indicated in
         Appendix 46B.

4.       Substitute the rates for transport and termination of traffic in
         Appendix D with the rates that may be indicated in Appendix 46B.

5.       Substitute the prices for unbundled elements in Appendix G with prices
         that may be indicated in Appendix 46B.


                                      N-1
<PAGE>   187




                                  APPENDIX 46B

                                OTHERCLEC TERMS
                       GTE/DTI OPT-IN NEGOTIATION ISSUES

Pursuant to Section 46 of Article III of the GTE/Digital Teleport, Inc.
Interconnection Agreement, and subject to all of the terms and condition
thereof, and after notice as called for in Section 46, the following terms as
written in the "Arbitrating CLEC" Agreement referred to in Section 46 will be
substituted for the GTE Terms which are set out in Appendix 46A as and when
Section 46 calls for them to be substituted.

When the identity of the Arbitrating CLEC Agreement is established pursuant to
the provisions of Section 46, the parties shall modify this Appendix by
replacing the descriptions of subjects below with the specific rates and terms
of the Arbitrating CLEC Agreement that describes those precise points.

1.       The resale discount percentages(s) ordered by the arbitrator to apply
         to the services that will be provided under Article VI of this
         Agreement for resale at a discount.

2.       The services that were ordered by the arbitrator to be made available
         for resale which would otherwise be excluded from available resale
         services under Article VI, Section 2.2 of this Agreement.

3.       The services that were ordered by the arbitrator to be made available
         for resale at a discount which would otherwise be made available but
         not at a discount under Article VI, Section 2.3. of this Agreement.

4.       The rates for transport and termination of traffic ordered by the
         arbitrator to apply to the services that will be provided under Article
         V of this Agreement.

5.       The rates for unbundled elements ordered by the arbitrator to apply to
         the services that will be provided under Article VII of this Agreement.




                                      O-1

<PAGE>   1



                                                                   EXHIBIT 10.26












                INTERCONNECTION, RESALE AND UNBUNDLING AGREEMENT



                                     BETWEEN



                           GTE SOUTHWEST INCORPORATED




                                       AND




                             DIGITAL TELEPORT, INC.


<PAGE>   2




                                TABLE OF CONTENTS
<TABLE>
<S>                                                                                                            <C>    
ARTICLE I
       SCOPE AND INTENT OF AGREEMENT.......................................................................... I-1

ARTICLE II
       DEFINITIONS ........................................................................................... II-1

1.     General Definitions.................................................................................... II-1
             1.1     "ACCESS SERVICE REQUEST" ................................................................ II-1
             1.2     "ACT" ................................................................................... II-1
             1.3     "AFFILIATE" ............................................................................. II-1
             1.4     "AMA" ................................................................................... II-1
             1.5     "APPLICABLE LAW" ........................................................................ II-1
             1.6     "AUTOMATIC LOCATION IDENTIFICATION/DATA MANAGEMENT SYSTEM (ALI/DMS)" .................... II-1
             1.7     "AUTOMATIC NUMBER IDENTIFICATION" OR "ANI" .............................................. II-1
             1.8     "BELLCORE" .............................................................................. II-1
             1.9     "BILL-AND-KEEP ARRANGEMENT" ............................................................. II-1
             1.10    "BONA FIDE REQUEST (BFR)" ............................................................... II-2
             1.11    "BUSINESS DAY" .......................................................................... II-2
             1.12    "CENTRAL OFFICE SWITCH" ................................................................. II-2
             1.13    "CENTRALIZED MESSAGE DISTRIBUTION SYSTEM" (CMDS) ........................................ II-2
             1.14    "CLLI CODES" ............................................................................ II-2
             1.15    "COMMERCIAL MOBILE RADIO SERVICES" (CMRS) ............................................... II-2
             1.16    "COMMISSION" ............................................................................ II-2
             1.17    "COMMON CHANNEL SIGNALING" OR "CCS" ..................................................... II-2
             1.18    "COMPETITIVE LOCAL EXCHANGE CARRIER" (CLEC) ............................................. II-2
             1.19    "COMPLIANCE" ............................................................................ II-2
             1.20    "CUSTOMER" .............................................................................. II-2
             1.21    "CUSTOMER USAGE DATA" ................................................................... II-2
             1.22    "DS-1" .................................................................................. II-3
             1.23    "DS-3" .................................................................................. II-3
             1.24    "ELECTRONIC FILE TRANSFER" .............................................................. II-3
             1.25    "EMR".................................................................................... II-3
             1.26    "E-911 SERVICE" ......................................................................... II-3
             1.27    "EXCHANGE SERVICE" ...................................................................... II-3
             1.28    "EIS" OR "EXPANDED INTERCONNECTION SERVICE" ............................................. II-3
             1.29    "FACILITY" .............................................................................. II-3
             1.30    "FCC" ................................................................................... II-3
             1.31    "GENERATOR" ............................................................................. II-3
             1.32    "GTOC" .................................................................................. II-3
             1.33    "GUIDE".................................................................................. II-3
             1.34    "HAZARDOUS CHEMICAL" .................................................................... II-4
             1.35    "HAZARDOUS WASTE" ....................................................................... II-4
             1.36    "IMMINENT DANGER" ....................................................................... II-4
             1.37    "INCUMBENT LOCAL EXCHANGE CARRIER" (ILEC) ............................................... II-4
             1.38    "INTERIM NUMBER PORTABILITY (INP)" ...................................................... II-4
             1.39    "INTERCONNECTION POINT" ("IP") .......................................................... II-4
             1.40    "ISDN USER PART (ISUP)" ................................................................. II-4
             1.41    "IXC" OR "INTEREXCHANGE CARRIER" ........................................................ II-4
             1.42    "INTERNETWORK FACILITIES" OR "INTERCONNECTION FACILITY" ................................. II-4
</TABLE>



                                     -i-
<PAGE>   3

<TABLE>
<S>                                                                                                            <C>
             1.43    "LATA" .................................................................................. II-4
             1.44    "LINE INFORMATION DATA BASE (LIDB)" ..................................................... II-4
             1.45    "LINE SIDE" ............................................................................. II-4
             1.46    "LOCAL EXCHANGE CARRIER" OR "LEC" ....................................................... II-5
             1.47    "LOCAL EXCHANGE ROUTING GUIDE" OR "LERG" ................................................ II-5
             1.48    "LOCAL NUMBER PORTABILITY (LNP)" ........................................................ II-5
             1.49    "LOCAL TRAFFIC" ......................................................................... II-5
             1.50    "MDF" OR "MAIN DISTRIBUTION FRAME" ...................................................... II-5
             1.51    "MEET-POINT BILLING" OR "MPB" ........................................................... II-5
             1.52    "MECAB" ................................................................................. II-5
             1 53    "MECOD" ................................................................................. II-5
             1.54    "MID-SPAN FIBER MEET" ................................................................... II-5
             1.55    "NANP" .................................................................................. II-6
             1.56    "NETWORK ELEMENT" ....................................................................... II-6
             1.57    "NID" OR "NETWORK INTERFACE DEVICE" ..................................................... II-6
             1.58    "NUMBERING PLAN AREA" OR "NPA" .......................................................... II-6
             1.59    "NXX", "NXX CODE", "CENTRAL OFFICE CODE" OR "CO CODE" ................................... II-6
             1.60    "911 SERVICE" ........................................................................... II-6
             1.61    "OWNER AND OPERATOR" .................................................................... II-6
             1 62    "POI" ................................................................................... II-6
             1.63    "POLE ATTACHMENT" ....................................................................... II-6
             1.64    "PROVIDER" .............................................................................. II-6
             1.65    "PUBLIC SAFETY ANSWERING POINT" OR "PSAP" ............................................... II-6
             1.66    "RATE CENTER" ........................................................................... II-7
             1.67    "RIGHT-OF-WAY" OR "ROW" ................................................................. II-7
             1.68    "ROUTING POINT" ......................................................................... II-7
             1.69    "SERVICE CONTROL POINT" OR "SCP" ........................................................ II-7
             1.70    "SERVICE SWITCHING POINT" OR "SSP" ...................................................... II-7
             1.71    "SIGNALING POINT" OR "SP" ............................................................... II-7
             1.72    "SIGNALING SYSTEM 7" OR "SS7" ........................................................... II-7
             1.73    "SIGNAL TRANSFER POINT" OR "STP" ........................................................ II-7
             1.74    "SUBSIDIARY" ............................................................................ II-7
             1.75    "SYNCHRONOUS OPTICAL NETWORK" OR "SONET" ................................................ II-7
             1.76    "SWITCHED ACCESS SERVICE" ............................................................... II-8
             1.77    "TELECOMMUNICATIONS SERVICES" ........................................................... II-8
             1.78    "THIRD PARTY CONTAMINATION" ............................................................. II-8
             1.79    "TRUNK SIDE" ............................................................................ II-8
             1.80    "UNDEFINED TERMS" ....................................................................... II-8
             1.81    "VERTICAL FEATURES" (INCLUDING "CLASS FEATURES") ........................................ II-8
             1.82    "WIRE CENTER" ........................................................................... II-8
        
ARTICLE III
       GENERAL PROVISIONS..................................................................................... III-1

1.     Scope of General Provisions............................................................................ III-1

2.     Term and Termination................................................................................... III-1
             2.1     Term..................................................................................... III-1
             2.2     Post-Termination Arrangements............................................................ III-1
             2.3     Termination Upon Default................................................................. III-1
             2.4     Termination Upon Sale.................................................................... III-1
             2.5     Liability upon Termination............................................................... III-1
</TABLE>   
            

                                     -ii-


<PAGE>   4
            
<TABLE>
<S>                                                                                                    <C>      
3.  Amendments........................................................................................ III-2
            
4.  Assignment........................................................................................ III-2
            
5.  Authority......................................................................................... III-2
            
6.  Responsibility for Payment........................................................................ III-2
            
7.  Billing and Payment............................................................................... III-2
             7.1     Dispute.......................................................................... III-2
             7.2     Late Payment Charge.............................................................. III-2
             7.3     Due Date......................................................................... III-2
             7.4     Audits........................................................................... III-2
             
8.  Binding Effect.................................................................................... III-3
            
9.  Capacity Planning and Forecasting................................................................. III-3
            
10. Compliance with Laws and Regulations.............................................................. III-3
            
11. Confidential Information.......................................................................... III-3
             11.1    Identification................................................................... III-3
             11.2    Handling......................................................................... III-3
             11.3    Exceptions....................................................................... III-4
             11.4    Survival......................................................................... III-4
               
12. Consent    ....................................................................................... III-4

13. Cooperation on Fraud Minimization................................................................. III-4

14. Dispute Resolution................................................................................ III-4
             14.1    Alternative to Litigation........................................................ III-4
             14.2    Negotiations..................................................................... III-5
             14.3    Arbitration...................................................................... III-5
             14.4    Expedited Arbitration Procedures................................................. III-5
             14.5    Costs............................................................................ III-5
             14.6    Continuous Service............................................................... III-6
       
15. Entire Agreement.................................................................................. III-6

16. Expenses............................................................................. ............ III-6

17. Force Majeure..................................................................................... III-6

18. Good Faith Performance............................................................................ III-6

19. Governing Law..................................................................................... III-6

20. Standard Practices................................................................................ III-6

21. Headings   ....................................................................................... III-6

22. Independent Contractor Relationship............................................................... III-6
</TABLE>





                                     -iii-


<PAGE>   5

<TABLE>
<S>                                                                                                    <C>
23. Law Enforcement Interface......................................................................... III-7

24. Liability and Indemnity........................................................................... III-7
             24.1    Indemnification.................................................................. III-7
             24.2    End User and Content-Related Claims.............................................. III-7
             24.3    DISCLAIMER....................................................................... III-8
             24.4    Limitation of Liability.......................................................... III-8
             24.5    Intellectual Property............................................................ III-8

25. Multiple Counterparts............................................................................. III-8

26. No Offer.......................................................................................... III-8

27. No Third Party Beneficiaries...................................................................... III-8

28. Notices........................................................................................... III-8

29. Protection........................................................................................ III-9
             29.1    Impairment of Service............................................................ III-9
             29.2    Resolution....................................................................... III-9
               
30. Publicity......................................................................................... III-9

31. Regulatory Agency Control......................................................................... III-9

32. Changes in Legal Requirements..................................................................... III-10

33. Effective Date.................................................................................... III-10

34. Regulatory Matters................................................................................ III-10

35. Rule of Construction.............................................................................. III-10

36. Section References................................................................................ III-10

37. Service Standards................................................................................. III-10
             37.1    ................................................................................. III-10
             37.2    ................................................................................. III-10
             37.3    ................................................................................. III-10
                
38. Severability...................................................................................... III-10

39. Subcontractors.................................................................................... III-10

40. Subsequent Law.................................................................................... III-10

41. Taxes............................................................................................. III-11

42. Trademarks and Trade Names........................................................................ III-11

43. Waiver............................................................................................ III-11
</TABLE>





                                     -iv-

<PAGE>   6

<TABLE>
<S>                                                                                                    <C>    
44. Environmental Responsibility...................................................................... III-11

45. TBD Prices........................................................................................ III-13

ARTICLE IV
    GENERAL RULES GOVERNING RESOLD SERVICES
    AND UNBUNDLED ELEMENTS............................................................................ IV-1

1.  General .......................................................................................... IV-1

2.  Liability of GTE.................................................................................. IV-1
             2.1     Inapplicability of Tariff Liability.............................................. IV-1
             2.2     DTI Tariffs or Contracts......................................................... IV-1
             2.3     No Liability for Errors.......................................................... IV-1
            
3.  Unauthorized Changes.............................................................................. IV-1
             3.1     Procedures....................................................................... IV-1
             3.2     Option to Restrict Changes Without Evidence of Authorization..................... IV-2
      
4.  Impact of Payment of Charges on Service........................................................... IV-2
                                                                                         
5.  Unlawful Use of Service........................................................................... IV-2

6.  Timing of Messages................................................................................ IV-3

7.  Procedures For Preordering, Ordering, Provisioning, Etc. ......................................... IV-3

8.  Customer Contacts................................................................................. IV-3

ARTICLE V
    INTERCONNECTION AND TRANSPORT AND TERMINATION OF TRAFFIC.......................................... V-1

1.  Services Covered by This Article.................................................................. V-1
             1.1     Types of Services................................................................ V-1
             1.2     Service Locations for Interconnection Services and Facilities.................... V-1
             1.3     Additional Services or Service Locations......................................... V-1
           
2.  Billing and Rates................................................................................. V-1
             2.1     Rates and Charges................................................................ V-1
             2.2     Billing.......................................................................... V-1
       
3.  Transport and Termination of Traffic.............................................................. V-1
             3.1     Traffic to be Exchanged.......................................................... V-1
             3.2     Compensation For Exchange Of Traffic............................................. V-2
             3.3     Tandem Switching Traffic......................................................... V-3
             3.4     Inter-Tandem Switching........................................................... V-3

4.  Direct Network Interconnection.................................................................... V-3
             4.1     Network Interconnection Architecture............................................. V-3
             4.2     Compensation..................................................................... V-4
             4.3     Trunking Requirements............................................................ V-5
             4.4     Network Redesigns Initiated by GTE............................................... V-6

</TABLE>
       

                                     -v-
<PAGE>   7
<TABLE>
<S>                                                                                                    <C>
             4.5     Interconnection Calling and Called Scopes for the Access Tandem
                     Interconnection and the End Office Interconnection............................... V-6

5.  Indirect Network Interconnection.................................................................. V-6

6.  Number Resources.................................................................................. V-6
             6.1     Number Assignment................................................................ V-6
             6.2     Rate Centers..................................................................... V-6
             6.3     Routing Points................................................................... V-6
             6.4     Code and Numbers Administration.................................................. V-7
             6.5     Programming Switches............................................................. V-7
       
7.  Interim Number Portability (INP).................................................................. V-7

8.  Meet-Point Billing................................................................................ V-7
             8.1     Meet-Point Arrangements.......................................................... V-7
             8.2     Compensation..................................................................... V-8

9.  Common Channel Signaling.......................................................................... V-8
             9.1     Service Description.............................................................. V-8
             9.2     Signaling Parameters............................................................. V-8
             9.3     Privacy Indicators............................................................... V-8
             9.4     Connection Through STP........................................................... V-8
             9.5     Third Party Signaling Providers.................................................. V-9
             9.6     Multi-Frequency Signaling........................................................ V-9

10. Service Quality and Performance................................................................... V-9

11. Network Outages................................................................................... V-9

ARTICLE VI
    RESALE OF SERVICES................................................................................ VI-1

1.  General........................................................................................... VI-1

2.  Terms and Conditions.............................................................................. VI-1
             2.1     Quality and Performance.......................................................... VI-1
             2.2     Restrictions on Resale........................................................... VI-1
             2.3     Restrictions on Discount of Retail Services...................................... VI-1
             2.4     Resale to Other Carriers......................................................... VI-2

3.  Ordering and Billing.............................................................................. VI-2
             3.1     Local Service Request............................................................ VI-2
             3.2     Certificate of Operating Authority............................................... VI-2
             3.3     Letter of Authorization.......................................................... VI-2
             3.4     Directory Assistance Listings.................................................... VI-2
             3.5     Nonrecurring Charges............................................................. VI-2
             3.6     Transfers Between DTI and Another Reseller of GTE Services....................... VI-2
             3.7     Local Calling Detail............................................................. VI-2
             3.8     Procedures....................................................................... VI-2
             3.9     LIDB............................................................................. VI-2
             3.10    "OLN"............................................................................ VI-3
</TABLE>

                                     -vi-
<PAGE>   8

<TABLE>
<S>                                                                                                    <C>
4.  Maintenance....................................................................................... VI-3
             4.1     Maintenance, Testing and Repair.................................................. VI-3
             4.2     Specifics and Procedures for Maintenance......................................... VI-3
             5.1     Description of Local Exchange Services Available for Resale...................... VI-3
             5.2     List of Services Available for Resale............................................ VI-3
             5.3     Rates............................................................................ VI-4
             5.4     Grandfathered Services........................................................... VI-4
             5.5     Access........................................................................... VI-4
             5.6     Operator Services (OS) and Directory Assistance (DA)............................. VI-4

ARTICLE VII
    UNBUNDLED NETWORK ELEMENTS........................................................................ VII-1

1.  General........................................................................................... VII-1

2.  Unbundled Network Elements........................................................................ VII-1
             2.1     Categories....................................................................... VII-1
             2.2     Prices........................................................................... VII-1
             2.3     Interconnection to Unbundled Elements............................................ VII-1
             2.4     Service Quality.................................................................. VII-2

3.  Network Interface Device.......................................................................... VII-2
             3.1     Direct Connection................................................................ VII-2
             3.2     NID to NID Connection............................................................ VII-2
             3.3     Removal of Cable Pairs........................................................... VII-3
             3.4     Maintenance...................................................................... VII-3

4.  Loop Elements..................................................................................... VII-3
             4.1     Service Description.............................................................. VII-3
             4.2     Categories of Loops.............................................................. VII-3
             4.3     Conditioned Loops................................................................ VII-4
             4.4     Features, Functions, Attributes.................................................. VII-4
             4.5     Digital Loop Carrier............................................................. VII-4
             4.6     Unbundled Loop Facility Certification............................................ VII-4
             4.7     Unbundled Loop Facility Notification............................................. VII-5
             4.8     Subloops......................................................................... VII-5

5.  Port and Local Switching Elements................................................................. VII-5
             5.1     Port............................................................................. VII-5
             5.2     Ports Available as Unbundled Network Elements.................................... VII-6
             5.3     Port Prices...................................................................... VII-6
             5.4     ................................................................................. VII-6
             Local Switching.......................................................................... VII-6
             5.5     Compliance with Section.......................................................... VII-6

6.  Transport Facility................................................................................ VII-6
             6.1     Service Description.............................................................. VII-6
             6.2     Categories/Types................................................................. VII-7

7.  SS7 Transport and Signaling....................................................................... VII-7
             7.1     ................................................................................. VII-7

8.  LIDB Services..................................................................................... VII-7
</TABLE>

                                    -vii-
<PAGE>   9
                                      
<TABLE>
<S>                                                                                                    <C>
9.  Database 800-Type Services........................................................................ VII-7

10. Data Switching.................................................................................... VII-7
             10.1    Access........................................................................... VII-7
             10.2    Nondiscrimination................................................................ VII-7
             10.3    Testing, Monitoring, Administration and Maintenance.............................. VII-7

11. Digital Cross Connect System (DCS)................................................................ VII-7
             11.1    Access........................................................................... VII-7
             11.2    Optional Characteristics......................................................... VII-7
             11.3    Alternate Provisioning........................................................... VII-7
             11.4    Elements......................................................................... VII-7
             11.5    Capabilities..................................................................... VII-8
             11.6    Protection and Performance....................................................... VII-8
             11.7    Provisioning, Administration and Maintenance..................................... VII-8
                                                                             
12. Operator Services (OS) and Directory Assistance (DA).............................................. VII-8
             12.1    Customized Routing............................................................... VII-8

13. Advanced Intelligent Network Access (AIN)......................................................... VII-9

14. Nondiscrimination Provision and Support........................................................... VII-9

15. Provisioning Intervals............................................................................ VII-9

16. Directory Assistance Listing...................................................................... VII-9

ARTICLE VIII
    ADDITIONAL SERVICES AND COORDINATED SERVICE ARRANGEMENTS.......................................... VIII-1

1.  Bona Fide Request Process......................................................................... VIII-1
             1.1     Intent .......................................................................... VIII-1
             1.2     Process ......................................................................... VIII-1

2.  Transfer of Service Announcements................................................................. VIII-1

3.  Misdirected Calls................................................................................. VIII-1
             3.1     ................................................................................. VIII-2
             3.2     ................................................................................. VIII-2

4.  911/E911 Arrangements............................................................................. VIII-2
             4.1     Description of Service........................................................... VIII-2
             4.2     Transport........................................................................ VIII-2
             4.3     Cooperation and Level of Performance............................................. VIII-2
             4.4     Basic 911 and E911 General Requirements.......................................... VIII-2
             4.5     Compensation..................................................................... VIII-6

5.  Information Services Traffic...................................................................... VIII-7
             5.1     Routing.......................................................................... VIII-7
             5.2     Billing and Collection and Information Service Provider (ISP) Remuneration....... VIII-7
             5.3     900-976 Call Blocking............................................................ VIII-7
             5.4     Miscellaneous ................................................................... VIII-7
</TABLE>

                                    -viii-
<PAGE>   10
<TABLE>
<S>                                                                                                    <C>
6.  Telephone Relay Service........................................................................... VIII-7

7.  Directory Assistance (DA) and Operator Services (OS).............................................. VIII-7
             7.1     Directory Assistance Calls....................................................... VIII-7
             7.2     Operator Services Calls.......................................................... VIII-8

8.  Directory Assistance Listings Information......................................................... VIII-8
             8.1     ................................................................................. VIII-8
             8.2     ................................................................................. VIII-8
             8.3     ................................................................................. VIII-8

9.  Directory Listings and Directory Distribution..................................................... VIII-8

10. Busy Line Verification and Busy Line Verification Interrupt....................................... VIII-9

11. SAG .............................................................................................. VIII-9

12. Dialing Format Changes............................................................................ VIII-9

13. Operational Support Systems (OSS)................................................................. VIII-9

ARTICLE IX
    COLLOCATION....................................................................................... IX-1

1.  Physical Collocation.............................................................................. IX-1
             1.1     Space Planning................................................................... IX-1
             1.2     Connection to Customer Loops and Ports........................................... IX-1
             1.3     Connection to Other Collocated Carriers.......................................... IX-1
             1.4     Choice of Vendor................................................................. IX-2
             1.5     Monitoring....................................................................... IX-2
             1.6     Phone Service.................................................................... IX-2
             1.7     Intraoffice Diversity............................................................ IX-2
             1.8     DTI Proprietary Information...................................................... IX-2
             1.9     Notification of Modifications.................................................... IX-2
             1.10    Drawings......................................................................... IX-2
             1.11    Construction of Space............................................................ IX-2
             1.12    Connection Equipment............................................................. IX-3
             1.13    Access to DTI Collocation Space.................................................. IX-3

2.  Virtual Collocation............................................................................... IX-4
             2.1     Existing Virtual Collocation..................................................... IX-4
             2.2     Conversion from Physical to Virtual.............................................. IX-4
             2.3     Vendors.......................................................................... IX-4
             2.4     Inspection....................................................................... IX-5

ARTICLE X
    ACCESS TO POLES, DUCTS, CONDUITS AND RIGHTS-OF-WAY ............................................... X-1

APPENDIX A
    GTE PERFORMANCE MEASURES (PM)..................................................................... A-1
</TABLE>

                                     -ix-
<PAGE>   11


<TABLE>
<S>                                                                                                    <C>
APPENDIX B
    SERVICE MATRIX.................................................................................... B-1

APPENDIX C
    INTERCONNECTION, TELECOMMUNICATIONS SERVICES
    AND FACILITIES AGREEMENT.......................................................................... C-1

APPENDIX D
    RATES AND CHARGES FOR
    TRANSPORT AND TERMINATION OF TRAFFIC.............................................................. D-1

APPENDIX E
    RATES AND CHARGES FOR LOCAL NUMBER PORTABILITY USING RCF.......................................... E-1

APPENDIX F
    SERVICES AVAILABLE FOR RESALE..................................................................... F-2

APPENDIX G
    PRICES FOR UNBUNDLED ELEMENTS..................................................................... G-1

APPENDIX H
    RATES AND CHARGES FOR 911/E911 ARRANGEMENTS....................................................... H-1

APPENDIX I
    SERVICE ORDERING, PROVISIONING, BILLING AND MAINTENANCE........................................... I-1

APPENDIX J
    SS7 SERVICES...................................................................................... J-1

APPENDIX K
    POLE ATTACHMENT AGREEMENT......................................................................... K-1

APPENDIX L
    CONDUIT OCCUPANCY AGREEMENT....................................................................... L-1

APPENDIX M
    RECIPROCAL COMPENSATION FOR CALL TERMINATION...................................................... M-1

APPENDIX 46A
    MCIm TERMS........................................................................................ N-1

APPENDIX 46B
    GTE TERMS......................................................................................... O-1
</TABLE>



                                     -x-
<PAGE>   12



This Interconnection, Resale and Unbundling Agreement (the "Agreement"), is made
effective as of ____________ 199__ , by and between GTE Southwest Incorporated, 
with its address for purposes of this Agreement at 600 Hidden Ridge Drive,
Irving, Texas 75038 ("GTE"), and Digital Teleport, Inc., in its capacity as a
certified provider of local dial-tone service ("DTI"), with its address for this
Agreement at 11111 Dorsett Road, St. Louis, Missouri 63043 (GTE and DTI being
referred to collectively as the "Parties" and individually as a "Party"). This
Agreement covers services in the State of Texas only (the "State"). 

WHEREAS, interconnection between competing Local Exchange Carriers ("LECs") is
necessary and desirable for the mutual exchange and termination of traffic
originating on each LEC's network; and

WHEREAS, the Parties desire to exchange such traffic and related signaling in a
technically and economically efficient manner at defined and mutually agreed
upon interconnection points; and

WHEREAS, the Parties wish to enter into an agreement to interconnect their
respective telecommunications networks on terms that are fair and equitable to
both Parties; and

WHEREAS, Section 251 of the Telecommunications Act of 1996 (the "Act") imposes
specific obligations on LECs with respect to the interconnection of their
networks, resale of their telecommunications services, access to their poles,
ducts, conduits and rights-of-way and, in certain cases, the offering of certain
unbundled network elements and physical collocation of equipment in LEC
premises; and 

WHEREAS, GTE is entering, under protest, into certain aspects of
this Agreement that incorporate adverse results from the arbitrated agreements
approved or which may be approved by the Commission in this state and is doing
so in order to avoid the expense of arbitration while at the same time
preserving its legal positions, rights and remedies. 

NOW, THEREFORE, in consideration of the mutual provisions contained herein and
other good and valuable consideration, the receipt and sufficiency of which are
hereby acknowledged, GTE and DTI hereby covenant and agree as follows:


<PAGE>   13




                                    ARTICLE I
                          SCOPE AND INTENT OF AGREEMENT

Pursuant to this Agreement, the Parties will extend certain arrangements to one
another within each area in which they both operate within the State for
purposes of interconnection and the exchange of traffic between their respective
end user customers, and reciprocal access to poles, ducts, conduits and
rights-of-way. This Agreement also governs the purchase by DTI of certain
telecommunications services provided by GTE in its franchise areas for resale by
DTI, the purchase by DTI of certain unbundled network elements from GTE, and the
terms and conditions of the collocation of certain equipment of DTI in the
premises of GTE. This Agreement is an integrated package that reflects a
balancing of interests critical to the Parties. This Agreement will be submitted
to the Texas Public Utility Commission (the "Commission") for approval. The
Parties agree that their entrance into this Agreement is without prejudice to
and does not waive any positions they may have taken previously, or may take in
the future, in any legislative, regulatory, judicial or other public forum
addressing any matters, including matters related to the same types of
arrangements and/or matters related to GTE's cost recovery covered in this
Agreement. DTI agrees to negotiate reciprocal terms and conditions with GTE
based on this Agreement. GTE's execution of this Agreement is not a concession
or waiver in any manner concerning its position that certain of the rates, terms
and conditions contained herein are unlawful, illegal and improper. 

The services and facilities to be provided to DTI by GTE in satisfaction of this
Agreement may be provided pursuant to GTE tariffs and then current practices.
Should such services and facilities be modified by tariff or by Order, including
any modifications resulting from other Commission proceedings, federal court
review or other judicial action, such modifications will be deemed to
automatically supersede any rates and terms and conditions of this Agreement.
GTE will provide notification to DTI before such a tariff becomes effective, and
DTI may provide input on such proposed tariff. The Parties shall cooperate with
one another for the purpose of incorporating required modifications into this
agreement.


                                     I-1
<PAGE>   14



                                   ARTICLE II
                                   DEFINITIONS

1.       General Definitions. Except as otherwise specified herein, the
         following definitions shall apply to all Articles and Appendices
         contained in this Agreement. Additional definitions that are specific
         to the matters covered in a particular Article may appear in that
         Article. To the extent that there may be any conflict between a
         definition set forth in this Article II and any definition in a
         specific Article or Appendix, the definition set forth in the specific
         Article or Appendix shall control with respect to that Article or
         Appendix. 

         1.1  "ACCESS SERVICE REQUEST" (ASR) means an industry standard form
              used by the Parties to add, establish, change or disconnect
              services or trunks for the purposes of Interconnection.

         1.2  "ACT" means the Telecommunications Act of 1996, Public Law 104-104
              of the 104th United States Congress effective February 8, 1996.

         1.3  "AFFILIATE" of a Party means a person, corporation or other legal
              entity that, directly or indirectly, owns or controls a Party, or
              is owned or controlled by, or is under common ownership or control
              with a Party.

         1.4  "AMA" means the Automated Message Accounting structure inherent in
              switch technology that initially records telecommunication message
              information. AMA format is contained in the Automated Message
              Accounting document, published by Bellcore as GR-1100-CORE which
              defines the industry standard for message recording.

         1.5  "APPLICABLE LAW" shall mean all laws, statutes, common law,
              regulations, ordinances, codes, rules, guidelines, orders,
              permits, and approvals of any Governmental Authority, which apply
              or relate to the subject matter of this Agreement.

         1.6  "AUTOMATIC LOCATION IDENTIFICATION/DATA MANAGEMENT SYSTEM
              (ALI/DMS)" means the emergency services (E911/911) database
              containing customer location information (including name, address,
              telephone number, and sometimes special information from the local
              service provider) used to process subscriber access records into
              Automatic Location Identification (ALI) records. From this
              database, records are forwarded to GTE's ALI Gateway for
              downloading by local ALI database systems to be available for
              retrieval in response to ANI from a 9-1-1 call. Also, from this
              database, GTE will upload to its selective routers the selective
              router ALI (SR/ALI) which is used to determine to which Public
              Safety Answering Point ("PSAP") to route the call.

         1.7  "AUTOMATIC NUMBER IDENTIFICATION" OR "ANI" refers to the number
              transmitted through the network identifying the calling party.

         1.8  "BELLCORE" means an organization owned jointly by the Bell
              regional holding companies and that may in the future be owned
              partially or totally by other persons, that conducts research and
              development projects for its owners, including development of new
              telecommunications services. Bellcore also provides certain
              centralized technical and management services for the regional
              holding companies and also provides generic requirements for the
              telecommunications industry for products, services and
              technologies. 

         1.9  "BILL-AND-KEEP ARRANGEMENT" means a compensation arrangement
              whereby the Parties do not render bills to each other for the
              termination of local traffic specified in this 

                                     II-1
<PAGE>   15


              Agreement and whereby the Parties terminate local exchange traffic
              originating from end-users served by the networks of the other
              Party without explicit charging among or between said carriers for
              such traffic exchange.

         1.10 "BONA FIDE REQUEST (BFR)" process is intended to be used when
              requesting customized Service Orders for certain services,
              features, capabilities or functionality defined and agreed upon by
              the Parties as services to be ordered as Bona Fide Requests.

         1.11 "BUSINESS DAY" shall mean Monday through Friday, except for
              holidays on which the U.S. mail is not delivered.

         1.12 "CENTRAL OFFICE SWITCH" means a switch used to provide
              telecommunications services including (I) "End Office Switches"
              which are Class 5 switches from which end user Exchange Services
              are directly connected and offered, and (ii) "Tandem Office
              Switches" which are Class 4 switches which are used to connect and
              switch trunk circuits between and among central office switches.
              Central office switches may be employed as combination end
              office/tandem office switches (combination Class 5/Class 4).

         1.13 "CENTRALIZED MESSAGE DISTRIBUTION SYSTEM" (CMDS) means the billing
              record and clearing house transport system that the Regional Bell
              Operating Companies ("RBOCs") and other incumbent LECs use to
              efficiently exchange out collects and in collects as well as
              Carrier Access Billing System ("CABS") records.

         1.14 "CLLI CODES" means Common Language Location Identifier Codes.

         1.15 "COMMERCIAL MOBILE RADIO SERVICES" (CMRS) means a radio
              communication service between mobile stations or receivers and
              land stations, or by mobile stations communicating among
              themselves that is provided for profit and that makes
              interconnected service available to the public or to such classes
              of eligible users as to be effectively available to a substantial
              portion of the public. 

         1.16 "COMMISSION" means the Texas Public Utility Commission.

         1.17 "COMMON CHANNEL SIGNALING" OR "CCS" means a high-speed specialized
              packet-switched communications network that is separate
              (out-of-band) from the public packet-switched and message
              networks. CCS carries addressed signaling messages for individual
              trunk circuits and/or database-related services between Signaling
              Points in the CCS network using SS7 signaling protocol.

         1.18 "COMPETITIVE LOCAL EXCHANGE CARRIER" (CLEC) means any company or
              person authorized to provide local exchange services in
              competition with an ILEC. 

         1.19 "COMPLIANCE" means environmental and safety laws and regulations
              are based upon a federal regulatory framework, with certain
              responsibilities delegated to the States. An environmental/safety
              compliance program may include review of applicable
              laws/regulations, development of written procedures, training of
              employees and auditing.

         1.20 "CUSTOMER" may mean GTE or DTI depending on the context and which
              Party is receiving the service from the other Party.

         1.21 "CUSTOMER USAGE DATA" means that the local telecommunications
              services usage data of a CLEC customer, measured in minutes,
              sub-minute increments, message units, or otherwise, that is
              recorded and exchanged by the Parties.


                                     II-2
<PAGE>   16


         1.22 "DS-1" is a digital signal rate of 1.544 Mbps.

         1.23 "DS-3" is a digital signal rate of 44.736 Mbps. 

         1.24 "ELECTRONIC FILE TRANSFER" refers to a system or process which
              utilizes an electronic format and protocol to send/receive data
              files.

         1.25 "EMR" means the Exchange Message Record which is an industry
              standard record used to exchange telecommunications message
              information among CLECs for billable, non-billable, sample,
              settlement and study data. EMR format is defined in BR-010-200-010
              CRIS Exchange Message Record, published by Bellcore and which
              defines the industry standard for exchange message records.

         1.26 "E-911 SERVICE" is a method of routing 911 calls to a Public
              Service Answering Point that uses a customer location database to
              determine the location to which a call should be routed. E-9-1-1
              service includes the forwarding of the caller's Automatic Number
              Identification (ANI) to the PSAP where the ANI is used to retrieve
              and display the Automatic Location Identification (ALI) on a
              terminal screen at the answering Attendant's position. It usually
              includes selective routing.          
         
         1.27 "EXCHANGE SERVICE" refers to all basic access line services, or 
              any other services offered to end users which provide end users   
              with a telephonic connection to, and a unique telephone number
              address on, the public switched telecommunications network 
              ("PSTN"), and which enable such end users to place or receive     
              calls to all other stations on the PSTN.

              1.28 "EIS" OR "EXPANDED INTERCONNECTION SERVICE" means a service
              that provides interconnecting carriers with the capability to
              terminate basic fiber optic transmission facilities, including
              optical terminating equipment and multiplexers, at GTE's wire
              centers and access tandems and interconnect those facilities with
              the facilities of GTE. Microwave is available on a case-by-case
              basis where feasible. 

         1.29 "FACILITY" means all buildings, equipment, structures and other
              items located on a single site or contiguous or adjacent sites
              owned or operated by the same persons or person as used in Article
              III, Section 44.

         1.30 "FCC" means the Federal Communications Commission.

         1.31 "GENERATOR" means under Resource Conservation Recovery Act (RCRA),
              the person whose act produces a hazardous waste (40 CFR 261) or
              whose act first causes a hazardous waste to become subject to
              regulation. The generator is legally responsible for the proper
              management and disposal of hazardous wastes in accordance with
              regulations.

         1.32 "GTOC" means GTE Telephone Operating Company.

         1.33 "GUIDE" means the GTE Open Market Transition Order/Processing
              Guide/ALEC Customer Guide, which contains GTE's operating
              procedures for ordering, provisioning, trouble reporting and
              repair for resold services and unbundled elements. Except as
              specifically provided otherwise in this Agreement, service
              ordering, provisioning, billing and maintenance shall be governed
              by the "Guide" which may be amended from time to time by GTE as
              needed.

                                     II-3
<PAGE>   17

         1.34 "HAZARDOUS CHEMICAL" means as defined in the U.S. Occupational
              Safety and Health (OSHA) hazard communication standard (29 CFR
              1910.1200), any chemical which is a health hazard or physical
              hazard.

         1.35 "HAZARDOUS WASTE" means as described in Resource Conservation
              Recovery Act (RCRA), a solid waste(s) which may cause, or
              significantly contribute to an increase in mortality or illness or
              pose a substantial hazard to human health or the environment when
              improperly treated, stored, transported or disposed of or
              otherwise managed because of its quantity, concentration or
              physical or chemical characteristics.

         1.36 "IMMINENT DANGER" means as described in the Occupational Safety
              and Health Act and expanded for environmental matters, any
              conditions or practices at a facility which are such that a danger
              exists which could reasonably be expected to cause death or
              serious harm or significant damage to the environment or natural
              resources.

         1.37 "INCUMBENT LOCAL EXCHANGE CARRIER" (ILEC) means any local exchange
              carrier that was as of February 8, 1996, deemed to be a member of
              the Exchange Carrier Association as set forth in 47 C.F.R.
              ss.69.601(b) of the FCC's regulations.

         1.38 "INTERIM NUMBER PORTABILITY (INP)" means the delivery of LNP
              capabilities, from a customer standpoint in terms of call
              completion, with as little impairment of functioning, quality,
              reliability, and convenience as possible and from a carrier
              standpoint in terms of compensation, through the use of existing
              and available call routing, forwarding, and addressing
              capabilities.

         1.39 "INTERCONNECTION POINT" ("IP") means the physical point on the
              network where the two parties interconnect. The "IP" is the
              demarcation point between ownership of the transmission facility.

         1.40 "ISDN USER PART (ISUP)" means a part of the SS7 protocol that
              defines call setup messages and call takedown messages. 

         1.41 "IXC" OR "INTEREXCHANGE CARRIER" means a telecommunications
              service provider authorized by the FCC to provide interstate long
              distance communications services between LATAs and are authorized
              by the State to provide inter- and/or intraLATA long distance
              communications services within the State.

         1.42 "INTERNETWORK FACILITIES" OR "INTERCONNECTION FACILITY" means the
              physical connection of separate pieces of equipment, transmission
              facilities, etc., within, between and among networks, for the
              transmission and routing of exchange service and exchange access.

         1.43 "LATA" means Local Access and Transport Area. A LATA denotes a
              geographic area for the provision and administration of
              communications service; i.e., intraLATA or interLATA. 

         1.44 "LINE INFORMATION DATA BASE (LIDB)" means one or all, as the
              context may require, of the Line Information databases owned
              individually by GTE and other entities which provide, among other
              things, calling card validation functionality for telephone line
              number cards issued by GTE and other entities. A LIDB also
              contains validation data for collect and third number-billed
              calls; i.e., Billed Number Screening.

         1.45 "LINE SIDE" refers to an end office switch connection that has
              been programmed to treat the circuit as a local line connected to
              an ordinary telephone station set. Line side

                                     II-4
<PAGE>   18

              connections offer only those transmission and signaling features
              appropriate for a connection between an end office and an ordinary
              telephone set.

         1.46 "LOCAL EXCHANGE CARRIER" OR "LEC" means any company certified by
              the Commission to provide local exchange telecommunications
              service. This includes the Parties to this Agreement.

         1.47 "LOCAL EXCHANGE ROUTING GUIDE" OR "LERG" means the Bellcore
              reference customarily used to identify NPA-NXX routing and homing
              information, as well as network element and equipment designation.

         1.48 "LOCAL NUMBER PORTABILITY (LNP)" means the ability of users of
              telecommunications services to retain, at the same location,
              existing telecommunications numbers without impairment of quality,
              reliability, or convenience when switching from one
              telecommunications carrier to another.

         1.49 "LOCAL TRAFFIC" means traffic that is originated by an end user of
              one Party and terminates to the end user of the other Party within
              GTE's then current local serving area, including mandatory local
              calling scope arrangements. A mandatory local calling scope
              arrangement is an arrangement that provides end users a local
              calling scope, Extended Area Service ("EAS"), beyond their basic
              exchange serving area. Local Traffic does not include optional
              local calling scopes (i.e., optional rate packages that permit the
              end user to choose a local calling scope beyond their basic
              exchange serving area for an additional fee), referred to
              hereafter as "optional EAS." Local Traffic excludes Information
              Service Provider ("ISP") traffic (e.g., Internet, paging, 900-976,
              etc.).

         1.50 "MDF" OR "MAIN DISTRIBUTION FRAME" means the distribution frame
              used to interconnect cable pairs and line trunk equipment
              terminating on a switching system. 

         1.51 "MEET-POINT BILLING" OR "MPB" refers to an arrangement whereby two
              LECs jointly provide the transport element of a switched access
              service to one of the LEC's end office switches, with each LEC
              receiving an appropriate share of the transport element revenues
              as defined by their effective access tariffs.

         1.52 "MECAB" refers to the Multiple Exchange Carrier Access Billing
              ("MECAB") document prepared by the Billing Committee of the
              Ordering and Billing Forum ("OBF"), which functions under the
              auspices of the Carrier Liaison Committee ("CLC") of the Alliance
              for Telecommunications Industry Solutions ("ATIS"). The MECAB
              document, published by Bellcore as Special Report SR-BDS-000983,
              contains the recommended guidelines for the billing of an access
              service provided by two or more LECs, or by one LEC in two or more
              states within a single LATA.

         1.53 "MECOD" refers to the Multiple Exchange Carriers Ordering and
              Design ("MECOD") Guidelines for Access Services - Industry Support
              Interface, a document developed by the Ordering/Provisioning
              Committee under the auspices of the Ordering and Billing Forum
              ("OBF"), which functions under the auspices of the Carrier Liaison
              Committee ("CLC") of the Alliance for Telecommunications Industry
              Solutions ("ATIS"). The MECOD document, published by Bellcore as
              Special Report SR-STS-002643, establish methods for processing
              orders for access service which is to be provided by two or more
              LECs. 

         1.54 "MID-SPAN FIBER MEET" means an Interconnection architecture
              whereby two carriers' fiber transmission facilities meet at a
              mutually agreed-upon POI.

                                     II-5
<PAGE>   19


         1.55 "NANP" means the "North American Numbering Plan", the system of
              telephone numbering employed in the United States, Canada, and the
              Caribbean countries that employ NPA 809.

         1.56 "NETWORK ELEMENT" means a facility or equipment used in the
              provision of a telecommunications service. Network Element
              includes features, functions, and capabilities that are provided
              by means of such facility or equipment, including subscriber
              numbers, databases, signaling systems, and information sufficient
              for billing and collection or used in the transmission, routing,
              or other provision of a telecommunications service. 

         1.57 "NID" OR "NETWORK INTERFACE DEVICE" means the point of demarcation
              between the end user's inside wiring and GTE's facilities. 

         1.58 "NUMBERING PLAN AREA" OR "NPA" is also sometimes referred to as an
              area code. This is the three digit indicator which is defined by
              the "A", "B", and "C" digits of each 10-digit telephone number
              within the NANP. Each NPA contains 800 possible NXX Codes. There
              are two general categories of NPA, "Geographic NPAs" and
              "Non-Geographic NPAs". A Geographic NPA is associated with a
              defined geographic area, and all telephone numbers bearing such
              NPA are associated with services provided within that geographic
              area. A Non-Geographic NPA, also known as a "Service Access Code"
              or "SAC Code" is typically associated with a specialized
              telecommunications service which may be provided across multiple
              geographic NPA areas. 800, 900, 700, and 888 are examples of
              Non-Geographic NPAs.

         1.59 "NXX", "NXX CODE", "CENTRAL OFFICE CODE" OR "CO CODE" is the three
              digit switch entity indicator which is defined by the "D", "E",
              and "F" digits of a 10-digit telephone number within the NANP.
              Each NXX Code contains 10,000 station numbers.

         1.60 "911 SERVICE" means a universal telephone number which gives the
              public direct access to the PSAP. Basic 911 service collects 911
              calls from one or more local exchange switches that serve a
              geographic area. The calls are then sent to the correct authority
              designated to receive such calls.

         1.61 "OWNER AND OPERATOR" means as used in OSHA regulations, owner is
              the legal entity, including a lessee, which exercises control over
              management and record keeping functions relating to a building or
              facility. As used in the Resource Conservation and Recovery Act
              (RCRA), operator means the person responsible for the overall (or
              part of the) operations of a facility.

         1.62 "POI" means Point of Interconnection designated for routing of
              local interconnection trunks.

         1.63 "POLE ATTACHMENT" has the meaning as set forth in Article X and
              Appendix K of this Agreement.

         1.64 "PROVIDER" may mean GTE or DTI depending on the context and which
              Party is providing the service to the other Party.

         1.65 "PUBLIC SAFETY ANSWERING POINT" OR "PSAP" means an answering
              location for 9-1-1 calls originating in a given area. A PSAP may
              be designated as Primary or Secondary, which refers to the order
              in which calls are directed for answering. Primary PSAPs respond
              first; Secondary PSAPs receive calls on a transfer basis only, and
              generally serve as a centralized answering location for a
              particular type of emergency call. PSAPs are staffed 


                                     II-6
<PAGE>   20


              by employees of Emergency Response Agencies ("ERAs") such as
              police, fire or emergency medical agencies or by employees of a
              common bureau serving a group of such entities.

         1.66 "RATE CENTER" means the specific geographic point and
              corresponding geographic area that are associated with one or more
              particular NPA-NXX Codes that have been assigned to a LEC for its
              provision of Exchange Services. The geographic point is identified
              by a specific Vertical and Horizontal (V&H) coordinate that is
              used to calculate distance-sensitive end user traffic to/from the
              particular NPA-NXXs associated with the specific Rate Center.

         1.67 "RIGHT-OF-WAY" OR "ROW" means the right to use the land or other
              property of another party to place poles, conduits, cables, other
              structures and equipment, or to provide passage to access such
              structures and equipment. A ROW may run under, on, or above public
              or private property (including air space above public or private
              property) and may include the right to use discrete space in
              buildings, building complexes, or other locations.

         1.68 "ROUTING POINT" denotes a location that a LEC has designated on
              its network as the homing (routing) point for traffic that
              terminates to Exchange Services provided by the LEC that bear a
              certain NPA-NXX designation. The Routing Point is used to
              calculate airline mileage for the distance-sensitive transport
              element charges of Switched Access Services. Pursuant to Bellcore
              Practice BR795-100-100, the Routing Point may be an end office
              location, or a "LEC Consortium Point of Interconnection." The
              Routing Point must be in the same LATA as the associated NPA-NXX.

         1.69 "SERVICE CONTROL POINT" OR "SCP" is the node in the signaling
              network to which informational requests for service handling, such
              as routing, are directed and processed. The SCP is a real time
              database system that, based on a query from the SSP, performs
              subscriber or application-specific service logic, and then sends
              instructions back to the SSP on how to continue call processing.

         1.70 "SERVICE SWITCHING POINT" OR "SSP" means a Signaling Point that
              can launch queries to databases and receive/interpret responses
              used to provide specific customer services.

         1.71 "SIGNALING POINT" OR "SP" means a node in the CCS network that
              originates and/or receives signaling messages, or transfers
              signaling messages from one signaling link to another, or both.

         1.72 "SIGNALING SYSTEM 7" OR "SS7" means the signaling protocol,
              Version 7, of the CCS network, based upon American National
              Standards Institute ("ANSI") standards.

         1.73 "SIGNAL TRANSFER POINT" OR "STP" means a packet switch in the CCS
              network that is used to route signaling messages among SSPs, SCPs
              and other STPs in order to set up calls and to query databases for
              advanced services. GTE's network includes mated pairs of local and
              regional STPs. STPs are provided in pairs for redundancy. GTE STPs
              conform to ANSI T1.111-8 standards. 

         1.74 "SUBSIDIARY" of a Party means a corporation or other legal entity
              that is majority owned by such Party.

         1.75 "SYNCHRONOUS OPTICAL NETWORK" OR "SONET" means synchronous
              electrical ("STS") or optical channel ("OC") connections between
              LECs.
                                     II-7
<PAGE>   21

         1.76 "SWITCHED ACCESS SERVICE" means the offering of facilities for the
              purpose of the origination or termination of traffic to or from
              Exchange Service customers in a given area pursuant to a switched
              access tariff. Switched Access Services include: Feature Group A,
              Feature Group B. Feature Group C, Feature Group D, 800 access and
              900 access services.

         1.77 "TELECOMMUNICATIONS SERVICES" means the offering of
              telecommunications for a fee directly to the public, or to such
              classes of users as to be effectively available directly to the
              public, regardless of the facilities used.

         1.78 "THIRD PARTY CONTAMINATION" means environmental pollution that is
              not generated by the LEC or DTI but results from off-site
              activities impacting a facility.

         1.79 "TRUNK SIDE" refers to a central office switch connection that is
              capable of, and has been programmed to treat the circuit as,
              connecting to another switching entity, for example, to another
              central office switch. Trunk side connections offer those
              transmission and signaling features appropriate for the connection
              of switching entities and cannot be used for the direct connection
              of ordinary telephone station sets.

         1.80 "UNDEFINED TERMS" means the Parties acknowledge that terms may
              appear in this Agreement which are not defined and agree that any
              such terms shall be construed in accordance with their customary
              usage in the telecommunications industry as of the effective date
              of this Agreement.

         1.81 "VERTICAL FEATURES" (INCLUDING "CLASS FEATURES") means vertical
              services and switch functionalities provided by GTE, including:
              Automatic Call Back; Automatic Recall; Call Forwarding Busy
              Line/Don't Answer; Call Forwarding Don't Answer; Call Forwarding
              Variable; Call Forwarding - Busy Line; Call Trace; Call Waiting;
              Call Number Delivery Blocking Per Call; Calling Number Blocking
              Per Line; Cancel Call Waiting; Distinctive Ringing/Call Waiting;
              Incoming Call Line Identification Delivery; Selective Call
              Forward; Selective Call Rejection; Speed Calling; and Three Way
              Calling/Call Transfer. 

         1.82 "WIRE CENTER" means a building or space within a building that
              serves as an aggregation point on a LEC's network, where
              transmission facilities and circuits are connected or switched.
              "Wire center" can also denote a building in which one or more
              Central Offices, used for the provision of exchange services and
              access services, are located.


                                     II-8
<PAGE>   22


                                 ARTICLE III
                              GENERAL PROVISIONS

1.       Scope of General Provisions. Except as may otherwise be set forth in a
         particular Article or Appendix of this Agreement, in which case the
         provisions of such Article or Appendix shall control, these General
         Provisions apply to all Articles and Appendices of this Agreement.

2.       Term and Termination.

         2.1  Term. Subject to the termination provisions contained in this
              Agreement, the term of this Agreement shall be two (2) years from
              the effective date referenced in the first paragraph of this
              Agreement and shall continue in effect for consecutive one (1)
              year terms until either Party gives the other Party at least
              ninety (90) calendar days written notice of termination, which
              termination shall be effective at the end of the then-current
              term. In the event notice is given less than 90 calendar days
              prior to the end of the current term, this Agreement shall remain
              in effect for 90 calendar days after such notice is received,
              provided, that in no case shall the term be extended beyond 90
              calendar days after the end of the current term.

         2.2  Post-Termination Arrangements. Except in the case of termination
              as a result of either Party's default or a termination upon sale,
              for service arrangements made available under this Agreement and
              existing at the time of termination, those arrangements may
              continue without interruption (a) under a new agreement
              voluntarily executed by the Parties; (b) standard terms and
              conditions approved and made generally effective by the
              Commission, if any; (c) tariff terms and conditions made generally
              available to all CLECs; or (d) any rights under Section 252(I) of
              the Act.

         2.3  Termination Upon Default. Either Party may terminate this
              Agreement in whole or in part in the event of a default by the
              other Party; provided however, that the non-defaulting Party
              notifies the defaulting party in writing of the alleged default
              and that the defaulting Party does not cure the alleged default
              within sixty (60) calendar days of receipt of written notice
              thereof. Default is defined to include: 

         (a)  A Party's insolvency or the initiation of bankruptcy or
              receivership proceedings by or against the Party; or 
        

         (b)  A Party's refusal or failure in any material respect properly
              to perform its obligations under this Agreement, or the
              violation any of the material terms or conditions of this
              Agreement. 
        
         2.4  Termination Upon Sale. Notwithstanding anything to the contrary
              contained herein, a Party may terminate this Agreement as to a
              specific operating area or portion thereof of such Party if such
              Party sells or otherwise transfers the area or portion thereof.
              The Party shall provide the other Party with at least ninety (90)
              calendar days' prior written notice of such termination, which
              shall be effective on the date specified in the notice.
              Notwithstanding termination of this Agreement as to a specific
              operating area, this Agreement shall remain in full force and
              effect in the remaining operating areas.

         2.5  Liability upon Termination. Termination of this Agreement, or any
              part hereof, for any cause shall not release either Party from any
              liability which at the time of termination had already accrued to
              the other Party or which thereafter accrues in any respect to any
              act or omission occurring prior to the termination or from an
              obligation which is expressly stated in this Agreement to survive
              termination.

                                    III-1
<PAGE>   23


3.       Amendments. Any amendment, modification, or supplement to this 
         Agreement must be in writing and signed by an authorized
         representative of each Party. The term "this Agreement" shall include
         future amendments, modifications, and supplements.

4.       Assignment. Any assignment by either Party of any right, obligation,
         or duty, in whole or in part, or of any interest, without the written
         consent of the other Party shall be void, except that either Party may
         assign all of its rights, and delegate its obligations, liabilities
         and duties under this Agreement, either in whole or in part, to any
         entity that is, or that was immediately preceding such assignment, a
         Subsidiary or  Affiliate of that Party without consent, but with
         written notification. The effectiveness of an assignment shall be
         conditioned upon the assignee's written assumption of the rights,
         obligations, and duties of the assigning Party.

5.       Authority. Each person whose signature appears on this Agreement       
         represents and warrants that he or she has authority to bind the Party
         on whose behalf he or she has executed this Agreement.

6.       Responsibility for Payment. All charges for Services provided under
         this Agreement will be billed to DTI, including all    applicable
         taxes and surcharges. In addition, the End User Common Line (EUCL)
         Charge from GTOC Tariff FCC No. 1 is applicable to Resold Services.
         DTI is responsible for payment of charges billed regardless of any
         billing arrangements or situation between DTI and its end user
         customer.


7.       Billing and Payment. Except as provided elsewhere in this      
         Agreement and where applicable, in conformance with MECAB and MECOD
         guidelines, DTI and GTE agree to exchange all information to
         accurately, reliably, and properly bill for features, functions and
         services rendered under this Agreement.

         7.1  Dispute. If one Party disputes a billing statement issued by      
              the other Party, the billed Party shall notify Provider in
              writing regarding the nature and the basis of the dispute within
              six (6) months of the statement date or the dispute shall be
              waived. The Parties shall diligently work toward resolution of
              all billing issues.

         7.2  Late Payment Charge. If any undisputed amount due on the billing
              statement is not received by Provider on the payment due
              date, Provider may charge, and Customer agrees to pay, at
              Provider's option, interest on the past due balance at a rate
              equal to the lesser of the interest rates set forth in the
              applicable GTE/Contel state access tariffs or the GTOC/GSTC FCC
              No. 1 tariff, one and one-half percent (1 1/2%) per month or the
              maximum nonusurious rate of interest under applicable law. Late
              payment charges shall be included on the next statement.

         7.3  Due Date. Payment is due 30 calendar days from the bill date.
         
         7.4  Audits. Either Party may conduct an audit of the other    Party's
              books and records pertaining to the Services provided under this
              Agreement, no more frequently than once per twelve (12) month
              period, to evaluate the other Party's accuracy of billing, data
              and invoicing in accordance with this Agreement. Any audit shall
              be performed as follows: (i) following at least thirty (30)
              Business Days' prior written notice to the audited Party; (ii)
              subject to the reasonable scheduling requirements and limitations
              of the audited Party: (iii) at the auditing Party's sole cost and
              expense; (iv) of a reasonable scope and duration; (v) in a manner
              so as not to interfere with the audited Party's business
              operations; and (vi) in compliance with the audited Party's
              security rules.

                                    III-2
<PAGE>   24


8.       Binding Effect. This Agreement shall be binding on and inure to        
         the benefit of the respective successors and permitted assigns of the
         Parties.

9.       Capacity Planning and Forecasting. Within thirty (30) days from        
         the Effective Date of this Agreement, the Parties agree to have met
         and developed joint planning and forecasting responsibilities which
         are applicable to Local Services, including Features, Network
         Elements, INP, Interconnection Services, Collocation, Poles, Conduits
         and Rights of Way (ROW). Such responsibilities shall include but are
         not limited to the following:

         (a)  The Parties will establish periodic reviews of network and
              technology plans and will notify one another no later than
              six (6) months in advance of changes that would impact either
              Party's provision of services.

         (b)  DTI will furnish to GTE information that provides for
              state-wide annual forecasts of order activity, in-service
              quantity forecasts, and facility/demand forecasts.

         (c)  The Parties will develop joint forecasting responsibilities
              for traffic utilization over trunk groups and yearly
              forecasted trunk quantities.

         (d)  DTI shall notify GTE promptly of changes to current forecasts
              (increase or decrease) that generate a shift in the demand
              curve for the following forecasting period.

10.      Compliance with Laws and Regulations. Each Party shall comply with     
         all federal, state, and local statutes, regulations, rules,
         ordinances, judicial decisions, and administrative rulings applicable
         to its performance under this Agreement.


11.      Confidential Information.

         11.1 Identification. Either Party may disclose to the other
              proprietary or confidential customer, technical, or business
              information in written, graphic, oral or other tangible or
              intangible forms ("Confidential Information"). In order for
              information to be considered Confidential Information under
              this Agreement, it must be marked "Confidential" or
              "Proprietary," or bear a marking of similar import. Orally or
              visually disclosed information shall be deemed Confidential
              Information only if contemporaneously identified as such and
              reduced to writing and delivered to the other Party with a
              statement or marking of confidentiality within thirty (30)
              calendar days after oral or visual disclosure.
              
         Notwithstanding the foregoing, preorders and all orders for Services
         or network elements placed by DTI pursuant to this Agreement, and
         information that would constitute customer proprietary network
         information of DTI end user customers pursuant to the Act and the
         rules and regulations of the FCC, as well as recorded usage
         information with respect to DTI end users, whether disclosed by DTI to
         GTE or otherwise acquired by GTE in the course of its performance
         under this Agreement, and where GTE is the NANP Number Plan
         Administrator, DTI information submitted to GTE in connection with
         such responsibilities shall be deemed Confidential Information of DTI
         for all purposes under this Agreement whether or not specifically
         marked or designated as confidential or proprietary. 

         11.2 Handling. In order to protect such Confidential Information
              from improper disclosure, each Party agrees:

         (a)  That all Confidential Information shall be and shall remain
              the exclusive property of the source;

                                    III-3
<PAGE>   25


         (b)  To limit access to such Confidential Information to
              authorized employees who have a need to know the Confidential
              Information for performance of this Agreement;
         
         (c)  To keep such Confidential Information confidential and to use
              the same level of care to prevent disclosure or unauthorized
              use of the received Confidential Information as it exercises
              in protecting its own Confidential Information of a similar
              nature;
         
         (d)  Not to copy, publish, or disclose such Confidential
              Information to others or authorize anyone else to copy,
              publish, or disclose such Confidential Information to others
              without the prior written approval of the source;
         
         (e)  To return promptly any copies of such Confidential
              Information to the source at its request; and
         
         (f)  To use such Confidential Information only for purposes of
              fulfilling work or services performed hereunder and for other
              purposes only upon such terms as may be agreed upon between
              the Parties in writing.
         
         11.3 Exceptions. These obligations shall not apply to any
              Confidential Information that was legally in the recipient's
              possession prior to receipt from the source, was received in
              good faith from a Third Party not subject to a confidential
              obligation to the source, now is or later becomes publicly
              known through no breach of confidential obligation by the
              recipient, was developed by the recipient without the
              developing persons having access to any of the Confidential
              Information received in confidence from the source, or that
              is required to be disclosed pursuant to subpoena or other
              process issued by a court or administrative agency having
              appropriate jurisdiction, provided, however, that the
              recipient shall give prior notice to the source and shall
              reasonably cooperate if the source deems it necessary to seek
              protective arrangements.
         
         
         11.4 Survival. The obligation of confidentiality and use with
              respect to Confidential Information disclosed by one Party to
              the other shall survive any termination of this Agreement for
              a period of three (3) years from the date of the initial
              disclosure of the Confidential Information.
         
12.      Consent. Where consent, approval, or mutual agreement is required      
         of a Party, it shall not be unreasonably withheld or delayed.

13.      Cooperation on Fraud Minimization. DTI assumes responsibility for      
         all fraud associated with its end user customers and accounts. GTE
         shall have no responsibility for, nor is it required to investigate or
         make adjustments to DTI's account in cases of fraud. The Parties agree
         that they shall cooperate with one another to resolve cases of fraud.
         The Parties' fraud minimization procedures are to be cost effective
         and implemented so as not to unduly burden or harm one Party as
         compared to the other.

14.      Dispute Resolution.

         14.1 Alternative to Litigation. Except as provided under Section
              252 of the Act with respect to the approval of this Agreement
              by the Commission, the Parties desire to resolve disputes
              arising out of or relating to this Agreement without
              litigation. Accordingly, except for action seeking a
              temporary restraining order or an injunction related to the
              purposes of this Agreement, or suit to compel compliance with
              this dispute resolution process, the Parties agree to use the
              following alternative dispute resolution procedures as their
              sole remedy 


                                    III-4
<PAGE>   26

              with respect to any controversy or claim arising out of or
              relating to this Agreement or its breach.

         14.2 Negotiations. At the written request of a Party, each Party
              will appoint a knowledgeable, responsible representative to
              meet and negotiate in good faith to resolve any dispute
              arising out of or relating to this Agreement. The Parties
              intend that these negotiations be conducted by non-lawyer,
              business representatives. The location, format, frequency,
              duration, and conclusion of these discussions shall be left
              to the discretion of the representatives. Upon agreement, the
              representatives may utilize other alternative dispute
              resolution procedures such as mediation to assist in the
              negotiations. Discussions and correspondence among the
              representatives for purposes of these negotiations shall be
              treated as confidential information developed for purposes of
              settlement, exempt from discovery, and shall not be
              admissible in the arbitration described below or in any
              lawsuit without the concurrence of all Parties. Documents
              identified in or provided with such communications, which are
              not prepared for purposes of the negotiations, are not so
              exempted and may, if otherwise discoverable, be discovered or
              otherwise admissible, be admitted in evidence, in the
              arbitration or lawsuit. 
         
         14.3 Arbitration. If the negotiations do not resolve the dispute
              within sixty (60) Business Days of the initial written
              request, the dispute shall be submitted to binding
              arbitration by a single arbitrator pursuant to the Commercial
              Arbitration Rules of the American Arbitration Association
              except that the Parties may select an arbitrator outside
              American Arbitration Association rules upon mutual agreement.
              A Party may demand such arbitration in accordance with the
              procedures set out in those rules. Discovery shall be
              controlled by the arbitrator and shall be permitted to the
              extent set out in this section. Each Party may submit in
              writing to a Party, and that Party shall so respond to, a
              maximum of any combination of thirty-five (35) (none of which
              may have subparts) of the following: interrogatories, demands
              to produce documents, or requests for admission. Each Party
              is also entitled to take the oral deposition of one
              individual of another Party. Additional discovery may be
              permitted upon mutual agreement of the Parties. The
              arbitration hearing shall be commenced within sixty (60)
              Business Days of the demand for arbitration. The arbitration
              shall be held in a mutually agreeable city. The arbitrator
              shall control the scheduling so as to process the matter
              expeditiously. The Parties may submit written briefs. The
              arbitrator shall rule on the dispute by issuing a written
              opinion within thirty (30) Business Days after the close of
              hearings. The times specified in this section may be extended
              upon mutual agreement of the Parties or by the arbitrator
              upon a showing of good cause. Judgment upon the award
              rendered by the arbitrator may be entered in any court having
              jurisdiction.
         
         14.4 Expedited Arbitration Procedures. If the issue to be resolved
              through the negotiations referenced in Section 14.2 directly
              and materially affects service to either Party's end user
              customers, then the period of resolution of the dispute
              through negotiations before the dispute is to be submitted to
              binding arbitration shall be five (5) Business Days. Once
              such a service affecting dispute is submitted to arbitration,
              the arbitration shall be conducted pursuant to the expedited
              procedures rules of the Commercial Arbitration Rules of the
              American Arbitration Association (i.e., rules 53 through 57).
         
         14.5 Costs. Each Party shall bear its own costs of these
              procedures. A Party seeking discovery shall reimburse the
              responding Party the costs of production of documents
              (including search time and reproduction costs). The Parties
              shall equally split the fees of the arbitration and the
              arbitrator.
         
                                    III-5
<PAGE>   27

         14.6 Continuous Service. The Parties shall continue providing
              services to each other during the pendency of any dispute
              resolution procedure, and the Parties shall continue to
              perform their obligations (including making payments in
              accordance with Article IV, Section 4) in accordance with
              this Agreement.
         
15.      Entire Agreement. This Agreement constitutes the entire agreement   
         of the Parties pertaining to the subject matter of this Agreement   
         and supersedes all prior agreements, negotiations, proposals, and   
         representations, whether written or oral, and all contemporaneous   
         oral agreements, negotiations, proposals, and representations       
         concerning such subject matter. No representations,                 
         understandings, agreements, or warranties, expressed or implied,    
         have been made or relied upon in the making of this Agreement       
         other than those specifically set forth herein.                     
                                                                             
16.      Expenses. Except as specifically set out in this Agreement, each    
         Party shall be solely responsible for its own expenses involved in  
         all activities related to the subject of this Agreement.            
                                                                             
17.      Force Majeure. In the event performance of this Agreement, or any   
         obligation hereunder, is either directly or indirectly prevented,   
         restricted, or interfered with by reason of fire, flood,            
         earthquake or likes acts of God, wars, revolution, civil            
         commotion, explosion, acts of public enemy, embargo, acts of the    
         government in its sovereign capacity, labor difficulties,           
         including without limitation, strikes, slowdowns, picketing, or     
         boycotts, unavailability of equipment from vendor, changes          
         requested by Customer, or any other circumstances beyond the        
         reasonable control and without the fault or negligence of the       
         Party affected, the Party affected, upon giving prompt notice to    
         the other party, shall be excused from such performance on a        
         day-to-day basis to the extent of such prevention, restriction, or  
         interference (and the other Party shall likewise be excused from    
         performance of its obligations on a day-to-day basis until the      
         delay, restriction or interference has ceased); provided however,   
         that the Party so affected shall use diligent efforts to avoid or   
         remove such causes of nonperformance and both Parties shall         
         proceed whenever such causes are removed or cease.                  
                                                                             
18.      Good Faith Performance. In the performance of their obligations     
         under this Agreement, the Parties shall act in good faith. In       
         situations in which notice, consent, approval or similar action by  
         a Party is permitted or required by any provision of this           
         Agreement, such action shall not be unreasonably delayed, withheld  
         or conditioned.                                                     
                                                                             
19.      Governing Law. This Agreement shall be governed by and construed    
         in accordance with the domestic laws of the state where the         
         Services are provided or the facilities reside and shall be         
         subject to the exclusive jurisdiction of the courts therein.        
                                                                             
20.      Standard Practices. The Parties acknowledge that GTE shall be       
         adopting some industry standard approaches and/or establishing its  
         own standard approaches to various requirements hereunder           
         applicable to DTI industry which may be added in the Guide. DTI     
         agrees that GTE may implement such approaches to satisfy any GTE    
         obligations under this Agreement. A copy is attached hereto as      
         Appendix A and is incorporated by reference into this Agreement.    
                                                                             
21.      Headings. The headings in this Agreement are inserted for           
         convenience and identification only and shall not be considered in  
         the interpretation of this Agreement.                               
                                                                             
22.      Independent Contractor Relationship. The persons provided by each   
         Party shall be solely that Party's employees and shall be under     
         the sole and exclusive direction and control of that Party. They    
         shall not be considered employees of the other Party for any        
         purpose. Each Party shall remain an independent contractor with     
         respect to the other and shall be responsible for compliance with   
         all laws, rules and regulations involving, but not limited to,      
         employment of labor,                                                
                                                                             

                                    III-6
<PAGE>   28


         hours of labor, health and safety, working conditions and payment
         of wages. Each Party shall also be responsible for payment of
         taxes, including federal, state and municipal taxes, chargeable or
         assessed with respect to its employees, such as Social Security,
         unemployment, workers' compensation, disability insurance, and
         federal and state withholding. Each Party shall indemnify the
         other for any loss, damage, liability, claim, demand, or penalty
         that may be sustained by reason of its failure to comply with this
         provision.
         
23.      Law Enforcement Interface.

         23.1 Except to the extent not available in connection with GTE's
              operation of its own business, GTE shall provide seven day a
              week/twenty-four hour a day assistance to law enforcement
              persons for emergency traps, assistance involving emergency
              traces and emergency information retrieval on customer
              invoked CLASS services, including, without limitation, call
              traces requested by DTI.
         
         23.2 GTE agrees to work jointly with DTI in security matters to
              support law enforcement agency requirements for taps, traces,
              court orders, etc. Charges for providing such services for
              DTI Customers will be billed to DTI.
         
         23.3 GTE will, in non emergency situations, inform the requesting
              law enforcement agencies that the end-user to be wire tapped,
              traced, etc. is a DTI Customer and shall refer them to DTI.
         
24.      Liability and Indemnity.

         24.1 Indemnification. Subject to the limitations set forth in
              Section 24.4 of this Article III, each Party agrees to
              release, indemnify, defend, and hold harmless the other Party
              from all losses, claims, demands, damages, expenses, suits,
              or other actions, or any liability whatsoever, including, but
              not limited to, costs and attorney's fees, whether suffered,
              made, instituted, or asserted by any other party or person,
              for invasion of privacy, personal injury to or death of any
              person or persons, or for losses, damages, or destruction of
              property, whether or not owned by others, proximately caused
              by the indemnifying Party's negligence or willful misconduct,
              regardless of form of action. The indemnified Party agrees to
              notify the other Party promptly, in writing, of any written
              claims, lawsuits, or demands for which it is claimed that the
              indemnifying Party is responsible under this Section and to
              cooperate in every reasonable way to facilitate defense or
              settlement of claims. The indemnifying Party shall have
              complete control over defense of the case and over the terms
              of any proposed settlement or compromise thereof. The
              indemnifying Party shall not be liable under this Section for
              settlement by the indemnified Party or any claim, lawsuit, or
              demand, if the indemnifying Party has not approved the
              settlement in advance, unless the indemnifying Party has had
              the defense of the claim, lawsuit, or demand tendered to it
              in writing and has failed to assume such defense. In the
              event of such failure to assume defense, the indemnifying
              Party shall be liable for any reasonable settlement made by
              the indemnified Party without approval of the indemnifying
              Party.
         
         24.2 End User and Content-Related Claims. Each Party agrees to
              release, indemnify, defend, and hold harmless the other
              Party, its affiliates, and any third-party provider or
              operator of facilities involved in the provision of Services,
              Unbundled Network Elements or Facilities under this Agreement
              (collectively, the "Indemnified Party") from all losses,
              claims, demands, damages, expenses, suits, or other actions,
              or any liability whatsoever, including, but not limited to,
              costs and attorney's fees, suffered, made, instituted, or
              asserted by either Party's end users against an Indemnified
              Party arising from Services, Unbundled Network Elements or
              Facilities. Each Party further agrees to release, indemnify,
              defend, and hold 
         

                                    III-7
<PAGE>   29


              harmless the Indemnified Party from all losses, claims,
              demands, damages, expenses, suits, or other actions, or any
              liability whatsoever, including, but not limited to, costs
              and attorney's fees, suffered, made, instituted, or asserted
              by any Third Party against an Indemnified Party arising from
              or in any way related to actual or alleged defamation, libel,
              slander, interference with or misappropriation of proprietary
              or creative right, or any other injury to any person or
              property arising out of content transmitted by the
              Indemnified Party or such Party's end users, or any other act
              or omission of the Indemnified Party or such Party's end
              users. 
              
         24.3 DISCLAIMER. EXCEPT AS SPECIFICALLY PROVIDED TO THE CONTRARY
              IN THIS AGREEMENT, PROVIDER MAKES NO REPRESENTATIONS OR
              WARRANTIES TO CUSTOMER CONCERNING THE SPECIFIC QUALITY OF ANY
              SERVICES, UNBUNDLED NETWORK ELEMENTS OR FACILITIES PROVIDED
              UNDER THIS AGREEMENT. PROVIDER DISCLAIMS, WITHOUT LIMITATION,
              ANY WARRANTY OR GUARANTEE OF MERCHANTABILITY OR FITNESS FOR A
              PARTICULAR PURPOSE, ARISING FROM COURSE OF PERFORMANCE,
              COURSE OF DEALING, OR FROM USAGES OF TRADE.
         
         24.4 Limitation of Liability. Each Party's liability, whether in
              contract, tort or otherwise, shall be limited to direct
              damages, which shall not exceed the monthly charges for the
              Services, Unbundled Network Elements or facilities for the
              month during which the claim of liability arose. Under no
              circumstance shall either Party be responsible or liable for
              indirect, incidental, or consequential damages, including,
              but not limited to, economic loss or lost business or
              profits, damages arising from the use or performance of
              equipment or software, or the loss of use of software or
              equipment, or accessories attached thereto, delay, error, or
              loss of data. Should either Party provide advice, make
              recommendations, or supply other analysis related to the
              Services, unbundled network elements or facilities described
              in this Agreement, this limitation of liability shall apply
              to provision of such advice, recommendations, and analysis.
         
         24.5 Intellectual Property. Neither Party shall have any
              obligation to defend, indemnify or hold harmless, or acquire
              any license or right for the benefit of, or owe any other
              obligation or have any liability to, the other based on or
              arising from any claim, demand, or proceeding by any Third
              Party alleging or asserting that the use of any circuit,
              apparatus, or system, or the use of any software, or the
              performance of any service or method, or the provision or use
              of any facilities by either Party under this Agreement
              constitutes direct or contributory infringement, or misuse or
              misappropriation of any patent, copyright, trademark, trade
              secret, or any other proprietary or intellectual property
              right of any Third Party.
         
25.      Multiple Counterparts. This Agreement may be executed in multiple   
         counterparts, each of which shall be deemed an original, but all    
         of which shall together constitute but one and the same document.   
                                                                             
26.      No Offer. This Agreement will be effective only upon execution and  
         delivery by both Parties and approval by the Commission in          
         accordance with Section 252 of the Act.                             
                                                                             
27.      No Third Party Beneficiaries. Except as may be specifically set     
         forth in this Agreement, this Agreement does not provide and shall  
         not be construed to provide third parties with any remedy, claim,   
         liability, reimbursement, cause of action, or other right or        
         privilege.                                                          
                                                                             
28.      Notices. Any notice to a Party required or permitted under this     
         Agreement shall be in writing and shall be deemed to have           
         been received on the date of service if served personally, on the   
         date receipt is acknowledged in writing by the recipient if         
         delivered by regular U.S. mail, or on the date                      

                                    III-8
<PAGE>   30


         stated on the receipt if delivered by certified or registered mail
         or by a courier service that obtains a written receipt. Upon prior
         immediate oral agreement of the parties' designated recipients
         identified below, notice may also be provided by facsimile,
         internet or electronic messaging system, which shall be effective
         if sent before 5:00 p.m. on that day, or if sent after 5:00 p.m.
         it will be effective on the next Business Day following the date
         sent. Any notice shall be delivered using one of the alternatives
         mentioned in this section and shall be directed to the applicable
         address indicated below or such address as the Party to be
         notified has designated by giving notice in compliance with this
         section:
         
         If to GTE:                GTE Central
                                   Attention: Regulatory Directory
                                   816 Congress 
                                   Suite 1500 
                                   Austin, Texas 78701 
                                   Facsimile number: (512) 370-4275 
                                   Internet Address: 
                                                    ----------------------
         
         If to DTI:                Digital Teleport, Inc.
                                   Attention: J.W. Sheehy, Vice President, 
                                   I.C. Support 
                                   11111 Dorsett Road 
                                   St. Louis, Missouri 63043 
                                   Facsimile number: (314) 253-6699
                                   Internet Address: 
                                                    ----------------------
         
29.      Protection.


         29.1 Impairment of Service. The characteristics and methods of
              operation of any circuits, facilities or equipment of either
              Party connected with the services, facilities or equipment of
              the other Party pursuant to this Agreement shall not
              interfere with or impair service over any facilities of the
              other Party, its affiliated companies, or its connecting and
              concurring carriers involved in its services, cause damage to
              their plant, violate any applicable law or regulation
              regarding the invasion of privacy of any communications
              carried over the Party's facilities or create hazards to the
              employees of either Party or to the public (each hereinafter
              referred to as an "Impairment of Service").
         
         
         29.2 Resolution. If either Party causes an Impairment in Service,
              the Party whose network or service is being impaired (the
              "Impaired Party") shall promptly notify the Party causing the
              Impairment of Service (the "Impairing Party") of the nature
              and location of the problem and that, unless promptly
              rectified, a temporary discontinuance of the use of any
              circuit, facility or equipment may be required. The Impairing
              Party and the Impaired Party agree to work together to
              attempt to promptly resolve the Impairment of Service. If the
              Impairing Party is unable to promptly remedy the Impairment
              of Service, then the Impaired Party may at its option
              temporarily discontinue the use of the affected circuit,
              facility or equipment.
         
30.      Publicity. Any news release, public announcement, advertising, or    
         any form of publicity pertaining to this Agreement, provision of     
         Services, Unbundled Network Elements or Facilities pursuant to it,   
         or association of the Parties with respect to provision of the       
         services described in this Agreement shall be subject to prior       
         written approval of both GTE and DTI.                                
                                                                              
31.      Regulatory Agency Control. This Agreement shall at all times be      
         subject to changes, modifications, orders, and rulings by the        
         Federal Communications Commission and/or the                         
                                                                              



                                    III-9

<PAGE>   31

         applicable state utility regulatory commission to the extent the
         substance of this Agreement is or becomes subject to the
         jurisdiction of such agency.
         
32.      Changes in Legal Requirements. GTE and DTI further agree that the     
         terms and conditions of this Agreement were composed in order to      
         effectuate the legal requirements in effect at the time the           
         Agreement was produced. Any modifications to those requirements       
         will be deemed to automatically supersede any terms and conditions    
         of this Agreement.                                                    
                                                                               
33.      Effective Date. If this Agreement or changes or modifications         
         thereto are subject to approval of a regulatory agency, the           
         "effective date" of this Agreement for such purposes will be ten      
         (10) Business Days after such approval or in the event this           
         Agreement is developed in whole or in part through arbitration,       
         sixty (60) Business Days after such approval. Such date (i.e., ten    
         (10) or, if arbitrated, sixty (60) Business Days after the            
         approval) shall become the "effective date" of this Agreement for     
         all purposes.                                                         
                                                                               
34.      Regulatory Matters. Each Party shall be responsible for obtaining     
         and keeping in effect all their own FCC, state regulatory             
         commission, franchise authority and other regulatory approvals        
         that may be required in connection with the performance of its        
         obligations under this Agreement.                                     
                                                                               
35.      Rule of Construction. No rule of construction requiring               
         interpretation against the drafting party hereof shall apply in       
         the interpretation of this Agreement.                                 
                                                                               
36.      Section References. Except as otherwise specified, references         
         within an Article of this Agreement to a Section refer to Sections    
         within that same Article.                                             
                                                                               
37.      Service Standards.                                                    

         37.1 The Parties shall meet applicable quality of local service
              standards imposed by the Commission and will provide a level
              of services to each other under this Agreement in compliance
              with the nondiscrimination requirements of the Act.
         
         37.2 GTE and DTI agree to implement the performance measures
              defined in Appendix A.
         
         37.3 The Parties will alert each other to any network events that
              can result or have resulted in service interruption, blocked
              calls, and/or changes in network performance.
         
38.      Severability. If any provision of this Agreement is held by a         
         court or regulatory agency of competent jurisdiction to be            
         unenforceable, the rest of the Agreement shall remain in full         
         force and effect and shall not be affected unless removal of that     
         provision results, in the opinion of either Party, in a material      
         change to this Agreement. If a material change as described in        
         this paragraph occurs as a result of action by a court or             
         regulatory agency, the Parties shall negotiate in good faith for      
         replacement language. If replacement language cannot be agreed        
         upon within a reasonable period, either Party may terminate this      
         Agreement without penalty or liability for such termination upon      
         written notice to the other Party.                                    
                                                                               
39.      Subcontractors. Provider may enter into subcontracts with third       
         parties or affiliates for the performance of any of Provider's        
         duties or obligations under this Agreement.                           
                                                                               
40.      Subsequent Law. The terms and conditions of this Agreement shall      
         be subject to any and all applicable laws, rules, or regulations      
         that subsequently may be prescribed by any federal, state or local    
         governmental authority. To the extent required by any such            
         subsequently prescribed law, rule, or regulation, the Parties         
         agree to modify, in writing, the affected term(s) and condition(s)    
         of this Agreement to bring them into compliance with such law,        
         rule, or regulation.                                                  
                                                                               
                                                                               


                                    III-10
<PAGE>   32


41.      Taxes. Any state or local excise, sales, or use taxes (excluding      
         any taxes levied on income) resulting from the performance of         
         this Agreement shall be borne by the Party upon which the             
         obligation for payment is imposed under applicable law, even if       
         the obligation to collect and remit such taxes is placed upon the     
         other Party. The collecting Party shall charge and collect from       
         the obligated Party, and the obligated Party agrees to pay to the     
         collecting Party, all applicable taxes, except to the extent that     
         the obligated Party notifies the collecting Party and provides to     
         the collecting Party appropriate documentation as GTE requires        
         that qualifies the obligated Party for a full or partial              
         exemption. Any such taxes shall be shown as separate items on         
         applicable billing documents between the Parties. The obligated       
         Party may contest the same in good faith, at its own expense, and     
         shall be entitled to the benefit of any refund or recovery,           
         provided that such Party shall not permit any lien to exist on        
         any asset of the other Party by reason of the contest. The            
         collecting Party shall cooperate in any such contest by the other     
         Party. The other Party will indemnify the collecting Party from       
         any sales or use taxes that may be subsequently levied on             
         payments by the other Party by the collecting Party.                  
                                                                               
         41.1 Tax - A charge which is statutorily imposed by the state or
              local jurisdiction and is either (a) imposed on the seller
              with the seller having the right or responsibility to pass
              the charge(s) on to the purchaser and the seller is
              responsible for remitting the charge(s) to the state or local
              jurisdiction or (b) imposed on the purchaser with the seller
              having an obligation to collect the charge(s) from the
              purchaser and remit the charge(s) to the state or local
              jurisdiction.
         
         Taxes shall include but not be limited to: federal excise tax,
         state/local sales and use tax, state/local utility user tax,
         state/local telecommunication excise tax, state/local gross
         receipts tax, and local school taxes. Taxes shall not include
         income, income-like, gross receipts on the revenue of a provider,
         or property taxes. Taxes shall not include payroll withholding
         taxes unless specifically required by statute or ordinance.
         
         41.2 Fees/Regulatory Surcharges - A charge imposed by a regulatory
              authority, other agency, or resulting from a contractual
              obligation, in which the seller is responsible or required to
              collect the fee/surcharge from the purchaser and the seller
              is responsible for remitting the charge to the regulatory
              authority, other agency, or contracting party.
         
         Fees/Regulatory Surcharges shall include but not be limited to
         E911/911, E311/311, franchise fees, Lifeline, hearing impaired,
         and Commission surcharges.
         
42.      Trademarks and Trade Names. Except as specifically set out in this   
         Agreement, nothing in this Agreement shall grant, suggest, or        
         imply any authority for one Party to use the name, trademarks,       
         service marks, or trade names of the other for any purpose           
         whatsoever.                                                          
                                                                              
43.      Waiver. The failure of either Party to insist upon the performance   
         of any provision of this Agreement, or to exercise any right or      
         privilege granted to it under this Agreement, shall not be           
         construed as a waiver of such provision or any provisions of this    
         Agreement, and the same shall continue in full force and effect.     
                                                                              
44.      Environmental Responsibility.                                        

         44.1 GTE and DTI agree to comply with applicable federal, state
              and local environmental and safety laws and regulations
              including U.S. Environmental Protection Agency (EPA)
              regulations issued under the Clean Air Act, Clean Water Act,
              Resource Conservation and Recovery Act, Comprehensive
              Environmental Response, Compensation and Liability Act,
              Superfund Amendments and Reauthorization Act and the Toxic
              Substances Control Act and OSHA regulations issued under the
              Occupational Safety and Health Act of 1970.




                                    III-11
<PAGE>   33


              Each Party has the responsibility to notify the other if
              Compliance inspections occur and/or citations are issued that
              impact any aspect of this Agreement such as occurring on a LEC
              Facility or involving DTI potential employee exposure. 
        
         44.2 GTE and DTI shall provide notice of known and recognized
              physical hazards or hazardous chemicals that must include
              providing Material Safety Data Sheets (MSDSs) for materials
              existing on site or brought on site to the Facility. Each
              Party is required to provide specific notice for potential
              imminent danger conditions which could include, but is not
              limited to, a defective utility pole or significant petroleum
              contamination in a manhole.
         
         44.3 GTE will make available additional environmental control or
              safety procedures for DTI to review and follow when working
              at a GTE Facility. Providing these procedures, beyond
              government regulatory Compliance requirements, is the
              decision of GTE. These practices/procedures will represent
              the regular work practices required to be followed by the
              employees and contractors of GTE for safety and environmental
              protection.
         
         44.4 Any materials brought, used or remaining at the Facility by
              DTI are owned by DTI. DTI will indemnify GTE for these
              materials. No substantial new safety or environmental hazards
              can be created or new hazardous materials can be used at a
              GTE Facility. DTI must demonstrate adequate emergency
              response capabilities for its materials used or remaining at
              the GTE Facility.
         
         44.5 When Third Party contamination is discovered at a GTE
              Facility, the Party uncovering the condition must notify the
              proper safety or environmental authority, if required under
              applicable laws or regulations. DTI must also notify GTE of
              Third Party contamination it discovers at GTE facilities. The
              cost causer (requiring access) will become the generator, as
              owner or operator, of any waste materials such as petroleum
              contaminated water, sewage or manhole sediment.
              Notwithstanding Section 24 and Section 44.9 of this Article
              III, the cost causer (requiring access) shall indemnify the
              other Party hereunder.
         
         44.6 DTI should obtain and use its own environmental permits, if
              necessary. If GTE's permit or EPA identification number must
              be used, DTI must comply with all of GTE's environmental
              processes including environmental "best management practices
              (BMP)" and/or selection of disposition vendors and disposal
              sites.
         
         44.7 DTI visitors must comply with GTE security, fire safety,
              safety, environmental and building practices/codes including
              equivalent employee training when working in GTE facilities.
         
         44.8 GTE and DTI shall coordinate plans or information required to
              be submitted to government agencies, such as emergency
              response plans and community reporting. If fees are
              associated with filing, GTE and DTI must develop a cost
              sharing procedure. 
         
         44.9 Notwithstanding Section 23, with respect to environmental
              responsibility under this Section 44, GTE and DTI shall
              indemnify, defend and hold harmless the other party from and
              against any claims (including, without limitation, Third
              Party claims for personal injury or real or personal property
              damage), judgments, damages (including direct and indirect
              damage, and punitive damages), penalties, fines, forfeitures,
              cost, liabilities, interest and losses proximately caused by
              the indemnifying Party's negligent or willful misconduct
              regardless of form, or in connection with the violation or
              alleged violation of any applicable requirement with respect
              to the presence or alleged presence of contamination arising
              out of the indemnifying party's acts or omissions concerning
              its operations at the Facility.
         
         


                                    III-12

<PAGE>   34

         44.10 Activities impacting safety or the environment of a Right of
               Way must be harmonized with the specific agreement and the
               relationship between GTE and the private land owner. This
               could include limitations on equipment access due to
               environmental conditions (e.g., wetland area with equipment
               restrictions).
         
45.      TBD Prices. Numerous provisions in this Agreement and its            
         Attachments refer to pricing principles. If a provision references   
         prices in an Attachment and there are no corresponding prices in     
         such Attachment, such price shall be considered "To Be Determined"   
         (TBD). With respect to all TBD prices, prior to DTI ordering any     
         such TBD item, the Parties shall meet and confer to establish a      
         price. If the Parties are unable to reach agreement on a price for   
         such item, an interim price shall be set for such item that is       
         equal to the price for the nearest analogous item for which a        
         price has been established (for example, if there is not an          
         established price for a nonrecurring charge (NRC) for a specific     
         network element, the Parties would use the NRC for the most          
         analogous retail service for which there is an established price).   
         Any interim prices so set shall be subject to modification by any    
         subsequent decision of the Commission. If an interim price is        
         different from the rate subsequently established by the              
         Commission, any underpayment shall be paid by DTI to GTE, and any    
         overpayment shall be refunded by GTE to DTI, within 45 Business      
         Days after the establishment of the price by the Commission.         
                                                                              
46.      Amendment of Certain Rates, Terms and Conditions. The rates, terms   
         and conditions in this Agreement that are specified in Appendix 46A 
         (the "MCIm Terms") were taken from the Interconnection, Resale and 
         Unbundling Agreement between GTE and MCImetro Access Transmission 
         Services, Inc. (the "MCIm Agreement") approved by the Commission in 
         Docket No. 16355. The rates, terms and conditions not included in this
         Agreement but referenced in Appendix 46B (the "GTE Terms") were 
         excluded from the MCIm Agreement by the Commission in Docket No. 
         16355. GTE and DTI agree that if the MCIm Terms are deemed to be 
         unlawful, or are stayed, enjoined or otherwise modified, in whole or 
         in part, by a court or commission of competent jurisdiction, then this
         Agreement shall be deemed to have been amended accordingly, by 
         modification of the MCIm Terms or, as appropriate, the substitution 
         of GTE Terms for all stayed or enjoined MCIm Terms, and such 
         amendments shall be effective retroactive to the Effective Date of 
         this Agreement.                                    
                                                                              
         GTE and DTI further agree that the terms and conditions of this      
         Agreement reflect certain requirements of the FCC's First Report     
         and Order in CC Docket No. 96-98. The terms and conditions of this   
         Agreement shall be subject to any and all actions by any court or    
         other governmental authority that invalidate, stay, vacate or        
         otherwise modify the FCC's First Report and Order, in whole or in    
         part ("subsequent action"). To the extent warranted by any such      
         subsequent action, the Parties agree that this Agreement shall be    
         deemed to have been modified accordingly as in the first paragraph   
         of this Section 46. The Parties agree to immediately apply any       
         affected terms and conditions, including any in other sections and   
         articles of this Agreement, consistent with such subsequent          
         action, and within a reasonable time incorporate such modified       
         terms and conditions in writing into this Agreement. If the MCIm     
         Terms are affected by such subsequent action and GTE determines      
         they cannot be consistently applied therewith, the GTE Terms shall   
         apply. DTI acknowledges that GTE may seek to enforce such            
         subsequent action before a commission or court of competent          
         jurisdiction. GTE does not waive any position regarding the          
         illegality or inappropriateness of the FCC's First Report and        
         Order.                                                               
                                                                              
         The rates, terms and conditions (including rates which may be        
         applicable under true-up) specified in both the GTE Terms and the    
         MCIm Terms are further subject to amendment, retroactive to the      
         Effective Date of the Agreement, to provide for charges or rate      
         adjustments resulting from future Commission or other proceedings,   
         including but not limited to any generic proceeding to determine     
         GTE's unrecovered costs (e.g., historic costs, contribution,         
         undepreciated reserve deficiency, or similar unrecovered GTE costs   
         (including GTE's end user                                            
                                                                              
                                                                              
                                                                              

                                    III-13

<PAGE>   35


         surcharge)), the establishment of a competitively neutral
         universal service system, or any appeal or other litigation.
         
         If the Commission (or any other commission or federal or state
         court) in reviewing this Agreement pursuant to applicable state or
         federal laws, including Section 252(e) of the Telecommunications
         Act of 1996, deletes or modifies in any way this Section 46, then
         the Parties agree that they will reopen negotiations within ten
         (10) days after receipt of the final decision making such deletion
         or modification in order to attempt to craft the new provision
         that will provide substantially the same protections to GTE and
         DTI as this Section 46. If the Parties cannot reach agreement on
         such a provision within twenty (20) calendar days thereafter, the
         Parties agree that this entire Agreement is void and will not
         become effective, and DTI agrees to withdraw this Agreement from
         consideration by the Commission (or any other commission or
         federal or state court). In such event, each Party shall have 25
         days following the close of the 20-day negotiation period within
         which to file a petition for arbitration before the Commission
         under Section 252(e) of the Telecommunications Act of 1996 of the
         issues that remain in dispute under this paragraph.
         
         




                                    III-14
<PAGE>   36
                                   ARTICLE IV
                     GENERAL RULES GOVERNING RESOLD SERVICES
                             AND UNBUNDLED ELEMENTS

1.       General. General regulations, terms and conditions governing rate
         applications, technical parameters, service availability, definitions
         and feature interactions, as described in the appropriate GTE
         intrastate local, toll and access tariffs, apply to retail services
         made available by GTE to DTI for resale and unbundled network elements
         provided by GTE to DTI, when appropriate, unless otherwise specified in
         this Agreement. As applied to services or network elements offered
         under this Agreement, the term "Customer" contained in the GTE Retail
         Tariff shall be deemed to mean "DTI" as defined in this Agreement.

2.       Liability of GTE.

         2.1  Inapplicability of Tariff Liability. GTE's general liability, as
              described in the GTE Retail Tariff, does not extend to DTI's
              customers or any other Third Party. Liability of GTE to DTI
              resulting from any and all causes arising out of services,
              facilities, network elements or any other items relating to this
              Agreement shall be governed by the liability provisions contained
              in this Agreement and no other liability whatsoever shall attach
              to GTE. GTE shall be liable for the individual services,
              facilities or elements that it separately provides to DTI and
              shall not be liable for the integration of components combined by
              DTI.
         
         2.2  DTI Tariffs or Contracts. DTI shall, in its tariffs or other
              contracts for services provided to its end users using services,
              facilities or network elements obtained from GTE, provide that in
              no case shall GTE be liable to DTI's end users or any third
              parties for any indirect, special or consequential damages,
              including, but not limited to, economic loss or lost business or
              profits, whether foreseeable or not, and regardless of
              notification by DTI of the possibility of such damages and DTI
              shall indemnify and hold GTE harmless from any and all claims,
              demands, causes of action and liabilities based on any reason
              whatsoever from its customers as provided in this Agreement.
              Nothing in this Agreement shall be deemed to create a third party
              beneficiary relationship with DTI's end users.

         2.3  No Liability for Errors. GTE is not liable for mistakes that
              appear in GTE's listings, 911 and other information databases, or
              for incorrect referrals of end users to DTI for any ongoing DTI
              service, sales or repair inquiries, and with respect to such
              mistakes or incorrect referrals, DTI shall indemnify and hold GTE
              harmless from any and all claims, demands, causes of action and
              liabilities whatsoever, including costs, expenses and reasonable
              attorney's fees incurred on account thereof, by third parties,
              including DTI's end users or employees. For purposes of this
              Section 2.3, mistakes and incorrect referrals shall not include
              matters arising out of the willful misconduct of GTE or its
              employees or agents.

3.       Unauthorized Changes.

         3.1  Procedures. If DTI submits an order for resold services or
              unbundled elements under this Agreement in order to provide
              service to an end user that at the time the order is submitted is
              obtaining its local services from GTE or another LEC using GTE
              resold services or unbundled elements, and the end user notifies
              GTE that the end user did not authorize DTI to provide local
              exchange services to the end user, DTI must provide GTE with
              written documentation of authorization from that end user within
              thirty (30) Business Days of notification by GTE. If DTI cannot
              provide written documentation of authorization within such time
              frame, DTI must within three (3) Business Days thereafter:



                                     IV-1
<PAGE>   37
         
         (a)  notify GTE to change the end user back to the LEC providing       
              service to the end user before the change to DTI was made; and

         (b)  provide any end user information and billing records DTI has      
              obtained relating to the end user to the LEC previously serving
              the end user; and 

         (c)  notify the end user and GTE that the change back to the   
              previous LEC has been made.

         Furthermore, GTE will bill DTI fifty dollars ($50.00) per              
         affected line to compensate GTE for switching the end user back to the
         original LEC.

         3.2  Option to Restrict Chances Without Evidence of Authorization.
              DTI's or GTE's end users may request GTE to permit changes of
              their provider of local exchange services only upon end user
              written notification to GTE that the end user wishes to change the
              end user's provider of local exchange services. In such a
              situation, GTE will not change an end user's provider of local
              exchange services without such written notification. 


4.       Impact of Payment of Charges on Service. DTI is solely responsible for
         the payment of all charges for all services, facilities and elements
         furnished under this Agreement, including, but not limited to, calls
         originated or accepted at its or its end users' service locations. If
         DTI fails to pay when due any and all charges billed to DTI under this
         Agreement, including any late payment charges (collectively, "Unpaid
         Charges"), and any or all such charges remain unpaid more than
         forty-five (45) Business Days after the due date of such Unpaid Charges
         excepting previously disputed charges for which DTI may withhold
         payment, GTE shall notify DTI in writing that it must pay all Unpaid
         Charges to GTE within seven (7) Business Days. If DTI disputes the
         billed charges, it shall, within said seven (7) day period, inform GTE
         in writing of which portion of the Unpaid Charges it disputes,
         including the specific details and reasons for the dispute, unless such
         reasons have been previously provided, and shall immediately pay to GTE
         all undisputed charges. If DTI and GTE are unable, within thirty (30)
         Business Days thereafter, to resolve issues related to the disputed
         charges, then either DTI or GTE may file a request for arbitration
         under Article III of this Agreement to resolve those issues. Upon
         resolution of any dispute hereunder, if DTI owes payment it shall make
         such payment to GTE with any late payment charge under Article III,
         Section 7.2, from the original payment due date. If DTI owes no
         payment, but has previously paid GTE such disputed payment, then GTE
         shall credit such payment including any late payment charges. If DTI
         fails to pay any undisputed Unpaid Charges, DTI shall, at its sole
         expense, within five (5) Business Days notify its end users that their
         service may be disconnected for DTI's failure to pay Unpaid Charges,
         and that its end users must select a new provider of local exchange
         services. If DTI fails to provide such notification or any of DTI's end
         users fail to select a new provider of services within the applicable
         time period, GTE will provide local exchange services to DTI's end
         users under GTE's applicable end user tariff at the then current
         charges for the services being provided. In this circumstance,
         otherwise applicable service establishment charges will not apply to
         DTI's end user, but will be assessed to DTI. GTE may discontinue
         service to DTI upon failure to pay undisputed charges as provided in
         this Section 4, and shall have no liability to DTI or DTI's end users
         in the event of such disconnection.

5.       Unlawful Use of Service. Services, facilities or unbundled elements
         provided by GTE pursuant to this Agreement shall not be used by DTI or
         its end users for any purpose in violation of law. DTI, and not GTE,
         shall be responsible to ensure that DTI and its end users use of
         services, facilities or unbundled elements provided hereunder comply at
         all times with all applicable laws. GTE may refuse to furnish service
         to DTI or disconnect particular services, facilities or unbundled
         elements provided under this Agreement to DTI or, as appropriate, DTI's
         end user when (i) an order is issued by a court of competent
         jurisdiction finding that probable cause exists to believe that the use
         made or to be made of the service, facilities or unbundled elements is
         prohibited by 




                                     IV-2
<PAGE>   38

         law or (ii) GTE is notified in writing by a law enforcement agency
         acting within its jurisdiction that any facility furnished by GTE is
         being used or will be used for the purpose of transmitting or receiving
         gambling information in interstate or foreign commerce in violation of
         law. Termination of service shall take place after reasonable notice is
         provided to DTI, or as ordered by the court. If facilities have been
         physically disconnected by law enforcement officials at the premises
         where located, and if there is not presented to GTE the written finding
         of a court, then upon request of DTI and agreement to pay restoral of
         service charges and other applicable service charges, GTE shall
         promptly restore such service.

6.       Timing of Messages. With respect to GTE resold measured rate local
         service(s), chargeable time begins when a connection is established
         between the calling station and the called station. Chargeable time
         ends when the calling station "hangs up," thereby releasing the network
         connection. If the called station "hangs up" but the calling station
         does not, chargeable time ends when the network connection is released
         by automatic timing equipment in the network. Timing of messages
         applicable to GTE's Port and Local Switching element (usage sensitive
         services) will be recorded based on originating and terminating access.

7.       Procedures For Preordering, Ordering, Provisioning, Etc. Certain
         procedures for preordering, ordering, provisioning, maintenance and
         billing and electronic interfaces for many of these functions are
         described in Appendix I. All costs and expenses for any new or modified
         electronic interfaces DTI requires that GTE determines are technically
         feasible and GTE agrees to develop will be paid by DTI pursuant to
         Appendix I. The schedule for implementation of any new or modified
         electronic interfaces will be developed by GTE according to industry
         standards and will be based upon the amount of work needed to design,
         test and implement the new or modified interface. 

8.       Customer Contacts. Except as otherwise provided in this Agreement or as
         agreed to in a separate writing by DTI, DTI shall provide the exclusive
         interface with DTI's end user customers in connection with the
         marketing or offering of DTI services. Except as otherwise provided in
         this Agreement, in those instances in which GTE personnel are required
         pursuant to this Agreement to interface directly with DTI's end users,
         such personnel shall not identify themselves as representing GTE. All
         forms, business cards or other business materials furnished by GTE to
         DTI end users shall bear no corporate name, logo, trademark or trade
         name other than DTI's. In no event shall GTE personnel acting on behalf
         of DTI pursuant to this Agreement provide information to DTI end users
         about GTE products or services.




                                     IV-3
<PAGE>   39

                                    ARTICLE V
            INTERCONNECTION AND TRANSPORT AND TERMINATION OF TRAFFIC

1.       Services Covered by This Article.

         1.1  Types of Services. This Article governs the provision of
              internetwork facilities (i.e., physical interconnection services
              and facilities), meet point billing by GTE to DTI or by DTI to GTE
              and the transport and termination and billing of Local, IntraLATA
              Toll, optional EAS traffic and jointly provided Interexchange
              Carrier Access between GTE and DTI. The services and facilities
              described in this Article shall be referred to in this Article V
              as the "Services."

         1.2  Service Locations for Interconnection Services and Facilities.
              Appendix B, Service Matrix, attached to this Agreement and made a
              part hereof, sets forth the Services and each location in the
              State where a Service shall be provided (the "Service Locations")
              and the Interconnection Point ("IP") for such Services.

         1.3  Additional Services or Service Locations. If, during the term of
              this Agreement, the parties determine that additional services are
              needed in the State, or existing Services will be offered in new
              locations in the State, the Parties shall execute an amendment to
              this Agreement substantially in the form of Appendix C attached to
              this Agreement and made a part hereof, incorporating the
              additional locations and/or any additional terms necessary for the
              additional services. Upon the effective date of the amendment, and
              continuing through the remaining term of this Agreement, the new
              services shall be deemed part of the Services provided pursuant to
              this Article and/or the new locations shall be deemed part of the
              Service Locations.

2.       Billing and Rates.

         2.1  Rates and Charges. Customer agrees to pay to Provider the rates
              and charges for the Services set forth in the applicable
              appendices to this Agreement. GTE's rates and charges are set
              forth in Appendix D attached to this Agreement and made a part
              hereof. DTI's separate rates and charges are also set forth in
              Appendix D attached hereto and made a part hereof.

         2.2  Billing. Provider shall render to Customer a bill for
              interconnection services on a current basis. Charges for physical
              facilities and other nonusage sensitive charges shall be billed in
              advance, except for charges and credits associated with the
              initial or final bills. Usage sensitive charges, such as charges
              for termination of Local Traffic, shall be billed in arrears. DTI
              is required to order trunks pursuant to Section 4.3.3 of this
              Article. Charges for traffic that has been routed over a
              jurisdictionally inappropriate trunk group (e.g., local traffic
              carried over trunks used for Switched Access Traffic) may be
              adjusted to reflect the appropriate compensation arrangement and
              may be handled as a post-billing adjustment to bills rendered.
              Additional matters relating to billing are included in Appendix I
              attached to this Agreement and made a part hereof.

3.       Transport and Termination of Traffic.

         3.1  Traffic to be Exchanged. The Parties shall reciprocally terminate
              Local, IntraLATA Toll, optional EAS and jointly provided
              Interexchange Carrier Traffic originating on each other's networks
              utilizing either Direct or Indirect Network Interconnections as
              provided in Section 4 or Section 5 herein. To this end, the
              Parties agree that there will be interoperability between their
              networks. The Parties agree to exchange traffic associated with
              Third-Party 



                                     V-1
<PAGE>   40

              LECs, CLECs and Wireless Service Providers pursuant to the
              compensation arrangement specified in Section 3.3 herein. Only
              traffic originated by or terminating to the Parties' end user
              customers is to be exchanged. In addition, the Parties will notify
              each other of any anticipated change in traffic to be exchanged
              (e.g., traffic type, volume).

         3.2  Compensation For Exchange Of Traffic.

              3.2.1     Mutual Compensation. The Parties shall compensate each
                        other for the exchange of Local Traffic in accordance
                        with Section 3.2.2 of this Article. The Parties will
                        develop an initial factor representative of the 
                        share of traffic exempt from local compensation. This
                        factor will be updated quarterly in like manner or as
                        the Parties otherwise agree. Once the traffic that is
                        exempt from local compensation can be measured, the
                        actual exempt traffic will be used rather than the
                        above factor. Charges for the transport and termination
                        of intraLATA toll and interexchange traffic shall be in
                        accordance with the Parties' respective intrastate or
                        interstate access tariffs, as appropriate

              3.2.2     Bill-and-Keep. The Parties shall assume that Local
                        Traffic is roughly balanced between the parties unless
                        traffic studies indicate otherwise. Accordingly, the
                        Parties agree to use a Bill-and-Keep Arrangement with
                        respect to termination of Local Traffic only. Either
                        Party may request that a traffic study be performed no
                        more frequently than once a quarter. Should such
                        traffic study indicate, in the aggregate, that either
                        Party is terminating more than 60 percent of the
                        Parties' total terminated minutes for Local Traffic,
                        either Party may notify the other that mutual
                        compensation will commence pursuant to the rates set
                        forth in Appendix D of this Agreement and following
                        such notice it shall begin and continue for the
                        duration of the Term of this Agreement unless otherwise
                        agreed. To account for ISP traffic, the Parties will
                        negotiate an initial factor(s) representative of the
                        proportionate share of traffic exempt from local
                        compensation. This factor will be updated quarterly in
                        a like manner or as the Parties otherwise agree. Once
                        the traffic that is exempt from local compensation can
                        be measured, the actual exempt traffic will be used
                        rather than the above factor. Nothing in this Section
                        3.2.2 shall be interpreted to (i) change compensation
                        set forth in this Agreement for traffic or services
                        other than Local Traffic, including but not limited to
                        internetwork facilities, access traffic or wireless
                        traffic, or (ii) allow either Party to aggregate
                        traffic other than Local Traffic for the purpose of
                        compensation under the Bill-and-Keep Arrangement
                        described in this Section 3.2.2, except as set forth in
                        Section 3.1 above.

              3.2.3     Sharing of Access Charges on Calls to Ported Numbers.
                        Until permanent number portability is implemented, the  
                        Parties agree that switched access termination to a
                        ported number will be billed by the party providing
                        interim number portability and that the party billing
                        the switched access will share the switched access
                        revenue with the other party. After permanent number
                        portability is implemented, the Parties agree to
                        renegotiate sharing of access charges to ported numbers
                        in accordance with permanent number portability
                        requirements. In lieu of actual measurements of minutes
                        and/exchange of billing records for this traffic the
                        Parties agree that the Party providing the ported
                        number will pay the other Party the rate per line/per
                        month as specified in Appendix E.

                        (a)  The number of lines/talk paths per ported number
                             that are subject to compensation will be
                             determined at the time the end user customer's
                             local service is changed from one party to the
                             other. The number of lines per number eligible for
                             the shared revenue arrangement described 



                                     V-2
<PAGE>   41

                             in this section will be limited to the number of   
                             lines in service on the date of conversion plus a
                             10% growth margin. After conversion the number of
                             lines per number available for compensation can
                             only be increased by mutual consent of the
                             parties.

                        (b)  The Parties agree that the compensation rate in
                             paragraph 3.3.3 may change as a result of changes  
                             in access rates, traffic volume or for other
                             reasons and agree to renegotiate the rate if a
                             significant event occurs. At a minimum, the
                             parties agree to reevaluate the rate on an annual
                             basis. 

                        (c)  The Parties agree that terminating switched access
                             calls ported via interim number portability may
                             appear to the receiving party to be a local call
                             and that the implementation of reciprocal
                             compensation for terminating local calls may
                             result in overcompensation for ported switched
                             access calls. Therefore, the Parties agree to
                             renegotiate the terminating shared access
                             compensation rate if reciprocal compensation for
                             local calls is implemented. 

         3.3  Tandem Switching Traffic. The Parties will provide tandem
              switching for traffic between the Parties' end offices subtending
              each other's access tandem, as well as for traffic between either
              Party's end users and any Third Party which is interconnected to
              the other Party's access tandems as follows: 

              3.3.1     The originating Party will compensate the tandem Party
                        for each minute of originated tandem switched
                        traffic which terminates to Third Party (e.g., other
                        CLEC, ILEC, or wireless service provider). The
                        applicable rate for this charge is identified in
                        Appendix D.

              3.3.2     The originating Party also assumes responsibility for
                        compensation to the company which terminates the call.

         3.4  Inter-Tandem Switching. The Parties will only use inter-tandem
              switching for the transport and termination of local/EAS or
              intraLATA toll traffic originating on each other's network at and
              after such time as either (i) DTI has agreed to and fully
              implemented an existing intraLATA toll compensation mechanism such
              as IntraLATA Terminating Access Compensation (ITAC) or a
              functional equivalent thereof or (ii) generally accepted industry
              signaling standards and AMA record standards support the
              recognition of multiple tandem switching events. 

4.       Direct Network Interconnection. 

         4.1  Network Interconnection Architecture. DTI may interconnect with
              GTE at any of the minimum technically feasible points required by
              the FCC. Interconnection at additional points will be reviewed on
              an individual case basis. Where the Parties mutually agree
              following a Bona Fide Request to directly interconnect their
              respective networks, interconnection will be as specified in the
              following subsections. The "IPs" shall be set forth in Appendix B
              attached to this Agreement and made a part hereof. Based on the
              configuration, the installation timeline will vary considerably,
              however, GTE will work with DTI in all circumstances to install
              "IPs" within 120 calendar days absent extenuating circumstances.
              Internetwork connection and protocol must be based on industry
              standards developed consistent with Section 256 of the
              Telecommunications Act of 1996.



                                     V-3
<PAGE>   42

              4.1.1     Subject to mutual agreement, the Parties may use the
                        following types of network facility interconnection,
                        using such interface media as are (i) appropriate to
                        support the type of interconnection requested and
                        (ii) available at the facility at which interconnection
                        is requested. For each  "IP" set forth in Appendix B,
                        the Parties shall specify the type of interconnection
                        used at that "IP."

                        (a)  A Mid-Span Fiber Meet within an existing GTE 
                             exchange area whereby the Parties mutually agree
                             to jointly plan  and engineer their facility "IP"
                             at a designated manhole or junction location. The
                             "IP" is the demarcation between ownership of the
                             fiber transmission facility. Each party is
                             individually responsible for its incurred costs in
                             establishing this arrangement.

                        (b)  A Virtual or Physical EIS arrangement at a GTE wire
                             center subject to the rates, terms, and conditions
                             contained in GTE's applicable tariffs.

                        (c)  A Special Access arrangement and/or Switched 
                             Transport terminating at a GTE wire center subject
                             to the rates, terms, and conditions contained
                             in GTE's applicable tariffs. These facilities will
                             meet the standards set forth in such tariffs.

              4.1.2     Virtual and Physical EIS arrangements are governed by
                        appropriate GTE tariffs, except as provided in 
                        Article IX, Section 1.3.

              4.1.3     The Parties will mutually designate at least one POI on
                        GTE's network within each GTE local calling area for the
                        routing of Local Traffic. Recording and billing of
                        traffic routed over these facilities shall be as
                        provided in Section 3.4 of this Article.

         4.2  Compensation. The Parties agree to the following compensation for
              internetwork facilities, depending on facility type.

              4.2.1     Mid-Span Fiber Meet: GTE will charge special access
                        (flat rated) transport from the applicable intrastate
                        access tariff and will rate charges between the "IP"
                        and GTE's interconnection switch. Charges will be
                        reduced to reflect the proportionate share of the
                        facility that is used for transport of traffic
                        originated by GTE. DTI will charge flat rated transport
                        to GTE for DTI facilities used by GTE at their tariffed
                        rates or as mutually agreed, not to exceed GTE rates.
                        DTI will apply charges based on the lesser of; (i) the
                        airline mileage from the "IP" to the DTI switch; or
                        (ii) the airline mileage from the GTE switch to the
                        serving area boundary.

              4.2.2     Collocation: GTE will charge Virtual or Physical EIS
                        rates from the applicable GTE tariff. DTI will charge
                        GTE flat rated transport at their tariffed rates
                        or as mutually agreed, not to exceed GTE rates, to
                        reflect the proportionate share of the facility that is
                        used for transport of traffic originated by GTE. DTI
                        will apply charges based on the lesser of; (i) the
                        airline mileage from the "IP" to the DTI switch; or
                        (ii) two (2) times the airline mileage from the GTE
                        switch to the serving area boundary.

              4.2.3     Special Access and/or Switched Access: GTE will charge
                        special access and/or switched access rates from the
                        applicable GTE intrastate access tariff. Charges will
                        be reduced to reflect the proportionate share of
                        the facility that is used for transport of traffic
                        originated by GTE. The Parties will negotiate an
                        initial factor representative of the proportionate
                        share of the facilities. This factor will be updated
                        quarterly in like manner or as the Parties otherwise
                        agree. 



                                     V-4
<PAGE>   43

         4.3  Trunking Requirements. 

              4.3.1     The Parties agree to establish trunk groups of
                        sufficient capacity from the interconnecting facilities
                        such that trunking is available to any switching
                        center designated by either Party, including end
                        offices, tandems, 911 routing switches, and directory
                        assistance/operator service switches. The Parties will
                        mutually agree where one-way or two-way trunking will
                        be available. The Parties may use two-way trunks for
                        delivery of local traffic or either Party may elect to
                        provision its own one-way trunks for delivery of local
                        traffic to the other Party. If a Party elects to
                        provision its own one-way trunks, that Party will be
                        responsible for its own expenses associated with the
                        trunks.

              4.3.2     DTI shall make available to GTE trunks over which GTE
                        shall terminate to end users of DTI-provided Exchange
                        Services, Local Traffic and intraLATA toll or
                        optional EAS traffic originated from end users of
                        GTE-provided Exchange Service.

              4.3.3     DTI and GTE shall, where applicable, make reciprocally
                        available, by mutual agreement, the required trunk
                        groups to handle different traffic types. DTI and GTE
                        will support the provisioning of trunk groups that
                        carry combined or separate Local Traffic and intraLATA
                        toll and optional EAS traffic. GTE requires separate
                        trunk groups from DTI to originate and terminate
                        interLATA calls and to provide Switched Access Service
                        to IXCs. To the extent DTI desires to have any
                        Interexchange Carriers (IC) originate or terminate
                        traffic to DTI, DTI will arrange for such IC to issue
                        an ASR to GTE instructing GTE to route such traffic
                        over the appropriate IC trunk group. Until GTE receives
                        and processes such ASR, the traffic will not be routed.

                        4.3.3.1   Each Party agrees to route traffic only over
                                  the proper jurisdictional trunk group.

                        4.3.3.2   Each Party shall only deliver traffic over the
                                  local interconnection trunk groups to the 
                                  other Party's access tandem for those 
                                  publicly-dialable NXX Codes served by end
                                  offices that directly subtend the access
                                  tandem or to those wireless service providers
                                  that directly subtend the access tandem.

                        4.3.3.3   Neither party shall route Switched Access
                                  Service traffic over local interconnection
                                  trunks, or local traffic over Switched Access
                                  Service trunks.

              4.3.4     DTI and GTE will reciprocally provide Percent Local
                        Usage (PLU) factors to each other on a quarterly basis
                        to identify the proper jurisdiction of each call
                        type that is carried over the required trunks.

              4.3.5     Reciprocal traffic exchange arrangement trunk
                        connections shall be made at a DS-1 or multiple
                        DS-1 level, DS-3, (SONET where technically available)
                        and shall be jointly-engineered to an objective P.01
                        grade of service.

              4.3.6     DTI and GTE agree to use diligent efforts to develop
                        and agree on a Joint Interconnection Grooming Plan
                        prescribing standards to ensure that the reciprocal
                        traffic exchange arrangement trunk groups are
                        maintained at consistent P.01 or better grades of
                        service. Such plan shall also include mutually-agreed
                        upon default standards for the configuration of all
                        segregated trunk groups.




                                     V-5
<PAGE>   44

              4.3.7     Signaling System 7 (SS7) Common Channel Signaling will
                        be used to the extent that such technology is
                        available.

              4.3.8     The Parties agree to offer and provide to each other
                        B8ZS Extended Superframe Format ("ESF") facilities,
                        where available, capable of voice and data traffic
                        transmission.

              4.3.9     The Parties will support intercompany 64kbps clear 
                        channel where available. 

         4.4  Network Redesigns Initiated by GTE. GTE will not charge DTI when
              GTE initiates its own network redesigns/reconfigurations.

         4.5  Interconnection Calling and Called Scopes for the Access Tandem
              Interconnection and the End Office Interconnection.

              4.5.1     GTE Access Tandem Interconnection calling scope
                        (originating and terminating) is to those GTE end
                        offices which subtend the GTE access tandem to which
                        the connection  is made except as provided for in
                        Section 3.3 of this Article V.

              4.5.2     GTE End Office Interconnection calling scope
                        (originating    and terminating) is only to the end
                        office to which the connection is made.

5.       Indirect Network Interconnection. Nether Party shall deliver traffic
         destined to terminate at the other Party's end office via another LEC's
         end office. In addition, neither Party shall deliver traffic destined
         to terminate at an end office subtending the other Party's access
         tandem via another LEC's access tandem until such time as compensation
         arrangements have been established in accordance with this Article V,
         Sections 3.1 and 3.4.

6.       Number Resources.

         6.1  Number Assignment. Nothing in this Agreement shall be construed
              to, in any manner, limit or otherwise adversely impact DTI's right
              to employ or to request and be assigned any NANP number resources
              including, but not limited to, Central Office (NXX) Codes pursuant
              to the Central Office Code Assignment Guidelines. Any request for
              numbering resources by DTI shall be made directly to the NANP
              Number Plan Administrator. Except with respect to those areas in
              which GTE is the NANP Number Plan Administrator, GTE shall not be
              responsible for the requesting or assignment of number resources
              to DTI. The Parties agree that disputes arising from numbering
              assignment shall be arbitrated by the NANP Number Plan
              Administrator. DTI shall not request number resources to be
              assigned to any GTE switching entity.

              6.1.1     Each Party shall be responsible for notifying its
                        customers of any changes in numbering or dialing
                        arrangements to include changes such as the
                        introduction of new NPAs or new NXX codes. Each Party
                        is responsible for administering NXX codes assigned to
                        it.

         6.2  Rate Centers. For purposes of compensation between the Parties and
              the ability of GTE to appropriately apply its toll tariff to its
              end user customers, DTI shall adopt the Rate Center areas and Rate
              Center points that the Commission has approved for the incumbent
              LEC and shall assign whole NPA-NXX codes to each Rate Center.

         6.3  Routing Points. DTI will also designate a Routing Point for each
              assigned NXX code. DTI may designate one location within each Rate
              Center as a Routing Point for the NPA-NXX associated with that
              Rate Center; alternatively DTI may designate a single location
              within 


                                      V-6

<PAGE>   45

              one Rate Center to serve as the Routing Point for all the NPA-NXXs
              associated with that Rate Center and with one or more other Rate
              Centers served by DTI within an existing GTE exchange area and
              LATA.

         6.4  Code and Numbers Administration. The Parties will comply with code
              administration requirements as prescribed by the FCC, the
              Commission, and accepted industry guidelines. Where GTE is the
              NANP Number Plan Administrator, GTE will administer number
              resources, and charge for such administration in accord with
              applicable rules and regulations. GTE will administer numbering
              resources in a competitively neutral manner, and process requests
              for NXX codes in a timely manner and in accord with industry
              standards. The Parties shall protect DTI proprietary information
              that may be submitted to GTE in connection with GTE's
              responsibilities as NANP Number Plan Administrator in accordance
              with Article III, Section 11 of this Agreement.

6.5      Programming Switches. It shall be the responsibility of each Party to
         program and update its own switches and network systems pursuant to the
         Local Exchange Routing Guide ("LERG") guidelines to recognize and route
         traffic to the other Party's assigned NXX codes at all times. Neither
         Party shall impose any fees or charges whatsoever on the other Party
         for such activities.

7.       Interim Number Portability (INP). Each Party shall provide the other
         Party with INP for the purpose of allowing end user customers to change
         service-providing Parties without changing their telephone number. GTE
         shall provide its INP to DTI using remote call forwarding ("RCF"). The
         GTE rates for INP service using RCF are set out in Appendix E attached
         to this Agreement and made a part hereof. If DTI wishes to use Direct
         Inward Dialing ("DID") to provide INP to its end users, DTI may
         purchase DID service from GTE at the rate specified in the appropriate
         GTE tariff. DTI shall provide INP to GTE at the rates specified for DTI
         in Appendix E. 

8.       Meet-Point Billing.

8.1      Meet-Point Arrangements.

         8.1.1  The Parties may mutually establish Meet-Point Billing ("MPB")
                arrangements in order to provide Switched Access Services to
                Access Service customers via a GTE access tandem in accordance
                with the MPB guidelines adopted by and contained in the Ordering
                and Billing Forum's MECAB and MECOD documents, except as
                modified herein and as described in Section 3.2.3 for Interim
                Portability. 

         8.1.2  Except in instances of capacity limitations, GTE shall permit
                and enable DTI to sub-tend the GTE access tandem(s) nearest to
                the DTI Rating Point(s) associated with the NPA-NXX(s) to/from
                which the Switched Access Services are homed. In instances of
                capacity limitation at a given access tandem, DTI shall be
                allowed to subtend the next-nearest GTE access tandem in which
                sufficient capacity is available. 

         8.1.3  Interconnection for the MPB arrangement shall occur at the "IP".
             
         8.1.4  Common Channel Signaling shall be utilized in conjunction with
                MPB arrangements to the extent such signaling is resident in the
                GTE access tandem switch. 

         8.1.5  DTI and GTE will use diligent efforts, individually and
                collectively, to maintain provisions in their respective federal
                and state access tariffs, and/or provisions within the National
                Exchange Carrier Association ("NECA") Tariff No. 4, or any
                successor tariff, sufficient to reflect this MPB arrangement,
                including MPB percentages. 

                                      V-7

<PAGE>   46

         8.1.6  As detailed in the MECAB document, DTI and GTE will, in a timely
                fashion, exchange all information necessary to accurately,
                reliably and promptly bill Access Service customers for Switched
                Access Services traffic jointly handled by DTI and GTE via the
                meet-point arrangement. Information shall be exchanged in
                Electronic Message Record ("EMR") format, on magnetic tape or
                via a mutually acceptable electronic file transfer protocol.
               
         8.1.7  DTI and GTE shall work cooperatively to coordinate rendering of
                Meet-Point bills to customers, and shall reciprocally provide
                each other usage data and related information at the appropriate
                charge. 

8.2      Compensation. 

         8.2.1  Initially, billing to Access Service customers for the Switched
                Access Services jointly provided by DTI and GTE via the MPB
                arrangement shall be according to the multiple-bill method as
                described in the MECAB guidelines. This means each Party will
                bill the portion of service they provided at their appropriate
                tariff, or price list. 

         8.2.2  Subsequently, DTI and GTE may mutually agree to implement one of
                the following options for billing to third parties for the
                Switched Access Services jointly provided by DTI and GTE via the
                MPB arrangement: single-bill/single tariff method,
                single-bill/multiple tariff method, or to continue the
                multiple-bill method. Should either Party prefer to change among
                these billing methods, that Party shall notify the other Party
                of such a request in writing, ninety (90) Business Days in
                advance of the date on which such change is desired to be
                implemented, such changes then may be made in accordance with
                MECAB guidelines and if the Parties mutually agree, the change
                will be made. 

9.       Common Channel Signaling. 

9.1      Service Description. The Parties will provide Common Channel Signaling
         ("CCS") to one another via Signaling System 7 ("SS7") network
         interconnection, where and as available, in the manner specified in FCC
         Order 95-187, in conjunction with all traffic exchange trunk groups.
         SS7 signaling and transport services shall be provided by GTE in
         accordance with the terms and conditions of this Section 9 of this
         Article and Appendix J attached to this Agreement and made a part
         hereof. The Parties will cooperate on the exchange of all appropriate
         SS7 messages for local and intraLATA call set-up signaling, including
         ISUP and Transaction Capabilities Application Part ("TCAP") messages to
         facilitate full interoperability of all CLASS Features and functions
         between their respective networks. Any other SS7 message services to be
         provided using TCAP messages (such as data base queries) will be
         jointly negotiated and agreed upon. 

9.2      Signaling Parameters. All SS7 signaling parameters will be provided in
         conjunction with traffic exchange trunk groups, where and as available.
         These parameters include Automatic Number Identification ("ANI"),
         Calling Party Number ("CPN"), Privacy Indicator, calling party category
         information, originating line information, charge number, etc. Also
         included are all parameters relating to network signaling information,
         such as Carrier Information Parameter ("CIP"), wherever such
         information is needed for call routing or billing. GTE will provide SS7
         via GR-394-SS7 and/or GR-317-SS7 format(s). 

9.3      Privacy Indicators. Each Party will honor all privacy indicators as
         required under applicable law. 

9.4      Connection Through STP. DTI must interconnect with the GTE STP(s)
         serving the LATA in which the traffic exchange trunk groups are
         interconnected. Additionally, all interconnection to GTE's 800/888
         database and GTE's LIDB shall, consistent with this section and
         Appendix J attached hereto, take place only through appropriate STP
         pairs. 

                                      V-8

<PAGE>   47

9.5      Third Party Signaling Providers. DTI may choose a third-party SS7
         signaling provider to transport messages to and from the GTE SS7
         network. In that event, that third-party provider must present a letter
         of agency to GTE, prior to the testing of the interconnection,
         authorizing the Third Party to act on behalf of DTI in transporting SS7
         messages to and from GTE. The third-party provider must interconnect
         with the GTE STP(s) serving the LATA in which the traffic exchange
         trunk groups are interconnected. 

9.6      Multi-Frequency Signaling. In the case where CCS is not available, in
         band Multi-Frequency ("MF"), wink start, E & M channel associated
         signaling with ANI will be provided by the Parties. Network signaling
         information, such as CIC/OZZ, will be provided wherever such
         information is needed for call routing or billing. 

10.      Service Quality and Performance. Each Party shall provide Services
         under this Article to the other Party that are equal in quality to that
         the Party provides to itself, its Affiliates or any other entity.
         "Equal in quality" shall mean that the Service will meet the same
         technical criteria and performance standards that the providing Party
         uses within its own network for the same Service at the same location
         under the same terms and conditions. 

11.      Network Outages. GTE shall work with DTI to establish reciprocal
         responsibilities for managing network outages and reporting. Each party
         shall be responsible for network outage as a result of termination of
         its equipment in GTE wire center or access tandem. DTI shall be
         responsible for notifying GTE of significant outages which could impact
         or degrade GTE switches and services.

                                      V-9


<PAGE>   48

                                   ARTICLE VI
                               RESALE OF SERVICES

1.       General. The purpose of this Article VI is to define the Exchange
         Services and related Vertical Features and other Services (collectively
         referred to for purposes of this Article VI as the "Services") that may
         be purchased from GTE and resold by DTI and the terms and conditions
         applicable to such resold Services. Except as specifically provided
         otherwise in this Agreement, provisioning of Exchange Services for
         resale will be governed by the GTE Guide. GTE will make available to
         DTI for resale any Telecommunications Service that GTE currently
         offers, or may offer hereafter, on a retail basis to subscribers that
         are not telecommunications carriers, except as qualified by Section 2.2
         below.

2.       Terms and Conditions.

2.1      Quality and Performance. GTE shall provide Services to DTI that are
         equal in quality and performance standards to the same Services
         provided by GTE to its own end user customers.

2.2      Restrictions on Resale. The following restrictions shall apply to the
         resale of retail services by DTI.

         2.2.1     DTI shall not resell Basic Exchange Residential Service.

         2.2.2     DTI shall not resell to one class of customers a service
                   that is offered by GTE only to another class of
                   customers in accordance with State requirements (e.g., R-1
                   to B-1, disabled services or Lifeline services to
                   non-qualifying customers).

         2.2.3     DTI shall not resell public pay telephone lines.

         2.2.4     DTI shall not resell semi-public pay telephone lines.

2.3      Restrictions on Discount of Retail Services. The discount specified in
         Section 5.3 herein shall apply to all retail services except for the
         following:

         2.3.1     DTI shall resell services that are provided at a volume
                   discount in accordance with terms and conditions of
                   applicable tariff. DTI shall not aggregate end user traffic
                   in order to qualify for volume discount.

         2.3.2     DTI shall resell ICB/Contract services without a discount and
                   only to end user customers that already have such services.

         2.3.3     DTI shall resell COCOT coin or coinless line but no discount
                   applies.

         2.3.4     DTI shall resell Lifeline services and services for the
                   disabled but no discount shall apply and they shall only
                   be resold to end user customers who qualify under GTE's
                   tariffs and state/Commission rules, orders and regulations.

         2.3.5     DTI shall resell special access but no discount applies.

         2.3.6     DTI shall resell Operator Services and Directory Assistance
                   as specified in Section 5.6 herein however no discount 
                   applies.




                                     VI-1
<PAGE>   49

         2.3.7     DTI shall resell promotional offerings that are ninety (90)
                   days or less in duration without a discount.

2.4      Resale to Other Carriers. Services available for resale may not be used
         by DTI to provide access to the local network as an alternative to
         tariffed switched and special access by other carriers, including, but
         not limited to; interexchange carriers, wireless carriers, competitive
         access providers, or other retail telecommunications providers.

3.       Ordering and Billing.

3.1      Local Service Request. Orders for resale of Services will be placed
         utilizing a standard Local Service Request ("LSR") form. GTE will
         continue to participate in industry forums for developing service
         order/disconnect order formats and will incorporate appropriate
         industry standards. A complete and accurate LSR (containing the
         requisite end user information as described in the Guide) must be
         provided by DTI before a request can be processed.

3.2      Certificate of Operating Authority. When ordering, DTI must represent
         and warrant to GTE that it is a certified provider of local dial-tone
         service. DTI will provide a copy of its Certificate of Operating
         Authority or other evidence of its status to GTE upon request.

3.3      Letter of Authorization. A Letter of Authorization ("LOA") will be
         required before resold Services will be provided in cases in which the
         subscriber currently receives Exchange Service from GTE or from a local
         service provider other than DTI. Such LOA may be a blanket LOA or such
         other form as agreed upon between GTE and DTI. GTE will not release
         information to DTI on GTE end user customer accounts unless DTI first
         provides to GTE a written LOA, signed by the end user customer,
         authorizing the release of such information to DTI or if state or
         federal law provides otherwise, in accordance with such law.

3.4      Directory Assistance Listings. GTE shall include a DTI customer listing
         in its Directory Assistance database as part of the Local Service
         Request ("LSR") process. GTE will honor DTI Customer's preferences for
         listing status, including non-published and unlisted, as noted on the
         LSR and will enter the listing in the GTE database which is used to
         perform Directory Assistance functions as it appears on the LSR.

3.5      Nonrecurring Charges. DTI shall be responsible for the payment of all
         nonrecurring charges ("NRCs") applicable to resold Services (e.g.,
         installation, changes, ordering charges) in accordance with the
         appropriate tariff. No discount applies to nonrecurring charges.

3.6      Transfers Between DTI and Another Reseller of GTE Services. When DTI
         has obtained an end user customer from another reseller of GTE
         services, DTI will inform GTE of the transfer by submitting a standard
         LSR to GTE.

3.7      Local Calling Detail. Except for those Services and in those areas
         where measured rate local service is available to end users, monthly
         billing to DTI does not include local calling detail. However, DTI may
         request and GTE shall consider developing the capabilities to provide
         local calling detail in those areas where measured local service is not
         available for a mutually agreeable charge.

3.8      Procedures. An overview of the procedures for preordering, ordering,
         provisioning and billing for resold services are outlined in Appendix
         I, attached hereto and made a part hereof.

3.9      LIDB. For resale services, GTE's service order will generate updates to
         the LIDB for validation of calling card, collect, and third number
         billed calls.

                                      VI-2

<PAGE>   50

3.10     "OLN". Upon request, GTE will update the database to provide
         Originating Line Number ("OLN") Screening which indicates to an
         operator the acceptable billing methods for calls originating from the
         calling number (e.g., penal institutions, COCOTS).

4.       Maintenance.

4.1      Maintenance, Testing and Repair. GTE will provide repair and        
         maintenance services to DTI and its end user customers for resold   
         Services in accordance with the same standards and charges used     
         for such services provided to GTE end user customers. GTE           
         will not initiate a maintenance call or take action in response     
         to a trouble report from a DTI end user until such time as          
         trouble is reported to GTE by DTI. DTI must provide to GTE all      
         end user information necessary for the installation, repair and     
         servicing of any facilities used for resold Services according to   
         the procedures described in the Guide.                              

4.2      Specifics and Procedures for Maintenance. An overview of the procedures
         for maintenance of resold services and additional matters agreed to by
         the Parties concerning maintenance are set forth in Appendix I.

5.       Services Available for Resale.

5.1      Description of Local Exchange Services Available for Resale. Resold
         basic Exchange Service includes, but is not limited to, the following
         elements: 

         (a)  Voice Grade Local Exchange Access Line - includes a telephone
              number and dial tone.

         (b)  Local Calling - at local usage measured rates if applicable to the
              end user customer.

         (c)  Access to long distance carriers

         (d)  E-911 Emergency Dialing

         (e)  Access to Service Access Codes - e.g., 800, 888, 900

         (f)  Use of AIN Services (those currently available to end users)

         (g)  End User Private Line Services

         (h)  Listing of telephone number in appropriate "white pages"
              directory; and

         (i)  Copy of "White Pages" and "Yellow Pages" directories for the
              appropriate GTE service area

5.2      List of Services Available for Resale. The type of Services listed on
         Appendix F, attached hereto and made a part of this Agreement, are
         available for resale by DTI. Subject to the limitations on resale
         enumerated in this Article, any new services that GTE offers in the
         future at retail to customers who are not telecommunications carriers
         shall also be available to DTI for resale under the same terms and
         conditions contained in this Agreement. Additional regulations, terms
         and conditions relating to the type of Services listed on Appendix F
         can be found in the appropriate intrastate local, toll and access
         tariffs. Terms, conditions and other matters concerning rate
         applications, technical parameters, provisioning capability,
         definitions and feature interactions contained in such tariffs are
         applicable to the type of Services offered under this Agreement and are
         incorporated herein by reference. Modifications to Services listed on
         Appendix F shall be provided to DTI in accordance with GTE's practices
         and procedures.


                                      VI-3

<PAGE>   51

5.3      Rates. The prices charged to DTI for Local Services shall be calculated
         as follows: 

         (1)  Avoided Cost Discount of 13.63% shall apply to all retail
              services except those services listed in Section 2.2 and Section
              2.3 herein.
 
         (2)  The discount dollar amount calculated under Step 1 above will be
              deducted from the retail rate.

         (3)  The resulting rate is the Wholesale Rate.

         (4)  This discount dollar amount in Step 2 above shall not change
              during the Term of this Agreement, even though GTE may change its
              retail rates.

5.4      Grandfathered Services. Services identified in GTE Tariffs as
         grandfathered in any manner are available for resale only to end user
         customers that already have such grandfathered service. An existing end
         user customer may not move a grandfathered service to a new service
         location.

5.5      Access. GTE retains all revenue due from other carriers for access to
         GTE facilities, including both switched and special access charges.

5.6      Operator Services (OS) and Directory Assistance (DA). Where GTE
         provides access to GTE Operator Services for local and toll assistance
         (for example, call completion, busy line verification and emergency
         interruption) and Directory Assistance (e.g., 411 calls routed to GTE's
         DA operator centers) as an element of Exchange Services offered for
         resale, DTI will be billed in accordance with Appendix F. GTE will
         provide its existing OS and DA to a DTI at the same quality and in a
         nondiscriminatory manner as the service GTE's end users receive. 

         5.6.1     Where Customized Routing is available (pursuant to Article
                   VII, Section 12.1), GTE will offer unbranded OS and DA or
                   rebranded OS and DA with the DTI brand. GTE will provide
                   such unbranding or rebranding on a switch-by-switch basis,
                   subject to capability and capacity limitations. Upon receipt
                   of an order for unbranding or rebranding, GTE will implement
                   within 90 Business Days when technically capable.

         5.6.2     DTI will be billed for unbranding or rebranding and
                   Customized Routing. Upon written request from DTI, GTE
                   will provide DTI with terms and conditions for providing
                   Customized Routing and branding, plus the applicable
                   charges. In addition, a port and dedicated trunk facilities
                   are required as specified in Article VII, Section 12.1.4. 

         5.6.3     For those offices that DTI has requested GTE to rebrand
                   and/or unbrand OS and DA, GTE will provide it using
                   live operators where GTE performs its own OS and DA service
                   and where handled by automated systems. If GTE uses a Third
                   Party contractor to provide OS or DA, GTE will not provide
                   branding nor will GTE negotiate it with a Third Party on
                   behalf of DTI. DTI must negotiate with the Third Party. In
                   these instances, DTI will need to purchase customized
                   routing to differentiate OS/DA traffic between GTE's and a
                   Third Party.


                                      VI-4

<PAGE>   52


                                   ARTICLE VII
                           UNBUNDLED NETWORK ELEMENTS

1.       General. The purpose of this Article VII is to define the unbundled
         network elements that may be leased by DTI from GTE. Unless otherwise
         specified in this Agreement, provisioning of unbundled network
         arrangements will be governed with the GTE Customer Guide for DTI
         Establishment of Services - Resale and Unbundling (the "Guide").
         Additional procedures for preordering, ordering, provisioning and
         billing of unbundled network elements are outlined in Appendix I.

2.       Unbundled Network Elements.

2.1      Categories.  There are several separate categories of Network 
         Components that shall be provided as unbundled network elements by GTE:

         (a)  Network Interface Device or NID

         (b)  Loop Elements

         (c)  Port and Local Switching Elements

         (d)  Transport Elements

         (e)  Signaling Elements

         (f)  Data Switching

         (g)  Digital Cross Connect System (DCS)

2.2      Prices. Individual unbundled network elements and prices are identified
         on Appendix G attached to this Agreement and made a part hereof, or
         under the appropriate GTE tariff as referenced in this Article.
         Nonrecurring charges relating to unbundled elements are also listed on
         Appendix G. 
         
         2.2.1     Reciprocal Compensation Arrangements for Call Termination.
                   Reciprocal compensation arrangements for call termination    
                   shall be as provided in Appendix M attached hereto.

2.3      Interconnection to Unbundled Elements. DTI may lease and interconnect
         to whichever of these unbundled network elements DTI chooses, and
         subject to technical feasibility, may combine these unbundled elements
         with any facilities or services that DTI may itself provide subject to
         the following: 

         2.3.1     Interconnection shall be achieved via expanded
                   interconnection/collocation arrangements DTI shall maintain
                   at the wire center at which the unbundled services are 
                   resident.

         2.3.2     DTI may order transport pursuant to Section 6 below as 
                   follows:

                   (a)  From the wire center at which the unbundled elements
                        (e.g., loop, port) are located to the GTE wire center
                        where DTI has established an interconnection/collocation
                        arrangement. 

                                     VII-1


<PAGE>   53

                   (b)  Directly from the DTI switch to a GTE wire center and
                        connect to unbundled loops. Applicable charges would be
                        transport, transport termination, multiplexing,
                        loop/port connector and loop.

         2.3.3     Each loop or port element shall be delivered to DTI
                   collocation arrangement over a loop/port connector
                   applicable to the unbundled services as listed on 
                   Appendix G. 

         2.3.4     DTI shall combine unbundled network elements with its own
                   facilities. GTE has no obligation to combine any network     
                   elements for DTI. DTI may not combine such network elements
                   to provide solely interexchange service or solely access
                   service to an interexchange carrier. 

2.4      Service Quality. To the degree reasonably possible, all service
         attributes, grades-of-service and installation, maintenance and repair
         intervals which apply to the bundled service will apply to unbundled
         network elements. Notwithstanding the foregoing, GTE shall not be
         responsible for impacts on service attributes, grades of service, etc.,
         resulting from DTI's specific use of or modification to any unbundled
         network element.

3.       Network Interface Device. 

3.1      Direct Connection. DTI shall be permitted to connect its own Loop
         directly to GTE's Network Interface Device or NID in cases in which DTI
         uses its own facilities to provide local service to an end user
         formerly served by GTE, as long as such direct connection does not
         adversely affect GTE's network. In order to minimize any such adverse
         effects, DTI shall follow the procedures in Sections 3.1.1 and 3.1.2
         below.

         3.1.1     When connecting its own loop facility directly to GTE's NID
                   for a residence or business customer, DTI must make a clean
                   cut on the GTE drop wire at the NID so that no bare
                   wire is exposed. DTI shall not remove or disconnect GTE's
                   drop wire from the NID or take any other action that might
                   cause GTE's drop wire to be left lying on the ground.

         3.1.2     At multi-tenant customer locations, DTI must remove the
                   jumper wire from the distribution block (i.e. the NID) to
                   the GTE cable termination block. If DTI cannot gain
                   access to the cable termination block, DTI must make a clean
                   cut at the closest point to the cable termination block. At
                   DTI's request and discretion, GTE will determine the cable
                   pair to be removed at the NID in multi-tenant locations. DTI
                   will compensate GTE for the trip charge necessary to
                   identify the cable pair to be removed.

         3.1.3     GTE agrees to offer NIDs for lease to DTI but not for sale.
                   DTI may remove GTE identification from any NID which it
                   connects to  a DTI loop, but DTI may not place its own
                   identification on such NID.

         3.1.4     GTE Loop elements leased by DTI will be required to
                   terminate only on a GTE NID. If DTI leasing a GTE loop
                   wants a DTI NID, they will also be required to lease a GTE
                   NID for the direct loop termination and effect a NID to NID
                   connection.

3.2      NID to NID Connection. Rather than connecting its loop directly to
         GTE's NID, DTI may also elect to install its own NID and effect a NID
         to NID connection to gain access to the end user's inside wiring. 

                                     VII-2

<PAGE>   54

         3.2.1     DTI that provides its own loop facilities may elect to move
                   all  inside wire terminated on a GTE NID to one provided by
                   DTI. In this instance, a NID to NID connection will not be
                   required. DTI, or the end user premise owner, can elect to
                   leave the GTE disconnected NID in place, or to remove the
                   GTE NID from the premise and dispose of it entirely. 

3.3      Removal of Cable Pairs. Removal of existing cable pairs required for 
         DTI to terminate service is the responsibility of DTI. 

3.4      Maintenance. When DTI provides its own loop and connects directly to
         GTE's NID, GTE does not have the capability to perform remote
         maintenance. DTI can perform routine maintenance via its loop and
         inform GTE once the trouble has been isolated to the NID and GTE will
         repair (or replace) the NID, or, at DTI's option, it can make a NID to
         NID connection, using the GTE NID only to gain access to the inside
         wire at the customer location. 

4.       Loop Elements. 

4.1      Service Description. a "Loop" is an unbundled component of Exchange
         Service. In general, it is the transmission facility (or channel       
         or group of channels on such facility) which extends from a Main
         Distribution Frame ("MDF") or functionally comparable piece of
         equipment in a GTE end office or wire center to a demarcation or
         connector block in/at a subscriber's premises. Traditionally, Loops
         were provisioned as 2-wire or 4-wire copper pairs running from the end
         office MDF to the customer premises. However, a loop may be provided
         via other media, including radio frequencies, as a channel on a high
         capacity feeder/distribution facility which may, in turn, be
         distributed from a node location to the subscriber premises via a
         copper or coaxial drop facility, etc. 

4.2      Categories of Loops. There are six general categories of loops:

         4.2.1     "2-wire analog voice grade" loops will support analog
                   transmission of 300-3000 Hz, repeat loop start or ground
                   start seizure and disconnect in one direction (toward
                   the end office switch), and repeat ringing in the other
                   direction (toward the end user). This loop is commonly used
                   for local dial tone service;

         4.2.2     "4-wire analog voice grade" loops conform to the
                   characteristics of a 2-wire voice grade loop and, in
                   addition, can support the simultaneous independent
                   transmission of information in both directions;

         4.2.3     "2-wire digital" loops will support industry standard
                   specifications for digital transmission. Special
                   provisioning (removal of bridge taps and/or load coils) will
                   be required to conform to these industry standards. The
                   price for 2-wire digital loops shall be the price for the
                   basic 2-wire loop plus the loop facility NRC to recover the
                   cost of the special provisioning.

         4.2.4     "4-wire digital" loops will support industry standard
                   specifications for digital transmission. Special
                   provisioning (removal of bridge taps and/or load coils) will
                   be required to conform to these industry standards. The
                   price for 4-wire digital loops shall be the price for the
                   basic 4-wire loop plus the loop facility NRC to recover the
                   cost of the special provisioning.

         4.2.5     "DS-1" loops will support a digital transmission rate of
                   1.544 Mbps. The DS-1 loop will have no bridge taps or load
                   coils and will employ special line treatment. DS-1 loops
                   will include span line repeaters where required, office
                   terminating repeaters, and DSX cross connects. Prices for
                   DS-1 grade loops are the prices set forth in the appropriate
                   GTE intrastate special access tariff.


                                     VII-3



<PAGE>   55


         4.2.6     "DS-3" loops will support the transmission of isochronous
                   bipolar serial data at a rate of 44.736 Mbps. This DS-3 type
                   of loop provides the equivalent of 28 DS-1 channels and
                   shall include the electronics at either end. 

4.3      Conditioned Loops. DTI may also require that the loops ordered above be
         conditioned in order for them to provide the end-user service. Examples
         of this type of conditioning are: Type C, Type DA, Improved C, Clear
         Channel, etc. The price for such a conditioned loops shall be the
         applicable charge as provided in the appropriate GTE intrastate special
         access tariff.

4.4      Features, Functions, Attributes. To the degree reasonably possible, all
         transport-based features, functions, service attributes,
         grades-of-service, installation, maintenance and repair intervals that
         apply to the bundled services will apply to unbundled loops.

         4.4.1     GTE will not perform routine testing of the unbundled loop
                   for maintenance purposes. DTI will be required to provision
                   a loop testing device either in its central office
                   (switch location), Network Control Center or in its
                   collocation arrangement to test the unbundled loop. GTE will
                   perform repair and maintenance once trouble is identified by
                   DTI.

         4.4.2     All Loop facilities furnished by GTE on the premises of
                   DTI's end users and up to the network interface or
                   functional equivalent are the property of GTE. GTE must have
                   access to all such facilities for network management
                   purposes. GTE employees and agents may enter said premises
                   at any reasonable hour to test and inspect such facilities
                   in connection with such purposes or, upon termination or
                   cancellation of the Loop facility, to remove such facility.

         4.4.3     GTE will provide loop transmission characteristics to DTI
                   end  users which are equal to those provided to GTE end
                   users.

         4.4.4     If DTI leases loops which are conditioned to transmit
                   digital signals, as a part of that conditioning, GTE will
                   test the loop and provide recorded test results to
                   DTI. In maintenance and repair cases, if loop tests are
                   taken, GTE will provide any recorded readings to DTI at time
                   the trouble ticket is closed in the same manner as GTE
                   provides to itself and its end users.

4.5      Digital Loop Carrier. Where GTE utilizes integrated digital loop
         carrier ("IDLC")1 technology to provision the Loop element, GTE will
         take the necessary affirmative steps to provide unbundled Loops. The
         basic Loop provided will support voice grade services. Loop
         capabilities beyond voice grade (i.e., ISDN, ADSL, etc.) will be
         provided under the terms and conditions, and at the prices indicated in
         Section 4.3.

         4.5.1     GTE will permit DTI to collocate digital loop carriers and 
                   associated equipment in conjunction with collocation 
                   arrangements DTI maintains at a GTE wire center for the
                   purpose of interconnecting to unbundled Loop elements.

4.6      Unbundled Loop Facility Certification. 

         4.6.1     Before deploying any service enhancing copper cable
                   technology (e.g., HDSL, ISDN, etc.) over unbundled 2-wire    
                   analog voice grade loops leased from GTE, DTI shall notify
                   GTE of

- --------

(1)   See Bellcore TR-TSY-000008, Digital Interface Between the SLC-96 Digital 
Loop Carrier System and Local Digital Switch and TR-TSY-000303, Integrated 
Digital Loop Carrier (IDLC) Requirements, Objectives and Interface.



                                    VII-4
<PAGE>   56

                   such intentions to enable GTE to assess the loop transport
                   facilities to determine whether there are any existing
                   copper cable loop transport technologies (e.g., analog       
                   carrier, etc.) deployed within the same cable sheath that
                   would be interfered with if DTI deployed the proposed
                   service enhancing copper cable technology. If there are
                   existing copper cable loop transport technologies already
                   deployed within the same cable sheath, or if GTE already has
                   existing near term (within 18 months of the date of facility
                   certification) plans to deploy copper cable loop transport
                   technologies that would be interfered with as described
                   above, GTE will so inform DTI and DTI shall not be permitted
                   to deploy such service enhancing copper cable technologies.
                   GTE will charge DTI the applicable engineering time and
                   labor costs to perform the certification.
                
         4.6.2     If DTI fails to notify GTE of its plans to deploy service
                   enhancing copper cable technology and obtain prior   
                   certification from GTE of the facilities, if DTI's
                   deployment of such technology is determined to have caused
                   interference with existing or planned copper cable loop
                   transport technologies deployed by GTE in the same cable
                   sheath, DTI will immediately remove such service enhancing
                   copper cable technology and shall reimburse GTE for all
                   incurred expense related to this interference. 

4.7      Unbundled Loop Facility Notification. 

         4.7.1     GTE reserves the right to deploy within its network at its
                   sole discretion any and all copper cable loop transport      
                   technologies. If GTE plans to deploy copper cable loop
                   transport technology within a cable sheath in which such
                   technology was not previously deployed, GTE will provide
                   notice to DTI of such planned deployment, indicating all
                   service enhancing copper cable technologies that would cause
                   interference with the technology to be deployed, or that
                   would be interfered with by the deployment of such
                   technology. Such notice will be provided at least ninety
                   (90) Business Days in advance of the planned deployment. If
                   DTI has deployed any technologies within the same cable
                   sheath that would interfere with, or be interfered with, by
                   the technology GTE plans to deploy, the parties will work
                   together to resolve the situation. 

4.8      Subloops. 

         4.8.1     GTE will provide as separate items the loop distribution,
                   loop concentrator and loop feeder on a case-by-case  basis
                   pursuant to a Bona Fide Request ("BFR"). 
                
         4.8.2     GTE will design and construct loop access facilities
                   (including loop feeders and loop concentration/multiplexing  
                   systems) in accordance with standard industry practices as
                   reflected in applicable tariffs and/or as agreed to by GTE
                   and DTI. 
                
         4.8.3     Transport for loop concentrators/multiplexers services not
                   supported by embedded technologies will be provided  
                   pursuant to applicable tariffs or as individually agreed
                   upon by GTE and DTI. The Parties understand that embedded
                   loop concentrators/multiplexers are not necessarily capable
                   of providing advanced and/or digital services. 
                
         4.8.4     GTE will provide loop transmission characteristics as
                   specified in Section 4.4.3 herein. 

5.       Port and Local Switching Elements.

5.1      Port. Port is an unbundled component of Exchange Service that provides
         for the interconnection of individual loops or trunks to the switching
         components of GTE's network. In general, it is a line card or trunk
         card and associated peripheral equipment on GTE end office switch that
         serves as the hardware termination for the end user's Exchange Service
         on that switch and generates dial 



                                    VII-5
<PAGE>   57


         tone and provides the end user access to the public switched
         telecommunications network. The port does not include such features and
         functions which are provided as part of Local Switching. Each line-side
         port is typically associated with one (or more) telephone number(s),
         which serve as the end user's network address.

5.2      Ports Available as Unbundled Network Elements. There are four types of
         Ports available as unbundled network elements;
                
         5.2.1     "2-wire analog line" Port is a line side switch connection 
                   employed to provide basic residential and business type
                   Exchange Service.
                
         5.2.2     "2-wire ISDN digital line" Port is a Basic Rate Interface
                   (BRI) line side switch connection employed to provide ISDN
                   Exchange   Services.
                
         5.2.3     "DS-1 digital trunk" Port is a direct inward dialing (DID)
                   trunk side switch connection employed to provide the
                   equivalent of 24 analog incoming trunk type Exchange
                   Services.
                
         5.2.4     "4-wire ISDN digital DS-1 trunk" Port is a Primary Rate    
                   Interface (PRI) trunk side switch connection employed to
                   provide the ISDN Exchange Services

5.3      Port Prices. Prices for 2-wire analog and DS-1 Ports are listed in
         Appendix G. 2-wire ISDN line side Ports and 4-wire ISDN trunk side
         Ports shall be provided at a price agreed to by the Parties.

5.4      Local Switching. Local switching provides the basic switching functions
         to originate, route and terminate traffic and any signaling deployed in
         the switch. Vertical features are optional services provided
         through software programming in the switch which can be added on a
         per-feature basis with applicable rate. GTE will offer only those
         features and functions currently available to the particular platform
         used (e.g., DMS, 5ESS, GTD5). Any feature or function which is not
         available, but the switch is capable of providing, may be requested via
         the BFR process. DTI will be responsible for bearing any costs incurred
         by GTE in making such feature/function available, including
         Right-to-Use (RTU) fees. The rates for Local Switching and Vertical
         Features are listed in Appendix G.

         5.4.1     DTI must purchase Local Switching with the line-side Port
                   or trunk-side Port, if applicable.

5.5      Compliance with Section 2.3. DTI shall only order unbundled elements in
         accordance with Section 2.3 herein and it will be the responsibility of
         DTI to make arrangements for the delivery of interexchange traffic and
         routing of traffic over interoffice transmission facilities, if
         applicable. 

6.       Transport Facility.

6.1      Service Description. Transport is an unbundled component of Exchange
         Service. In general, it is the transmission facility (or channel or
         group of channels on such facility) which extends from a Main
         Distribution Frame (MDF) or functionally comparable piece of equipment
         in a GTE end office or access tandem to either (I) another MDF or
         functionally comparable piece of equipment in a GTE end office or
         access tandem, or (ii) a meet point with transport facilities of DTI or
         another carrier. Transport may be provided over a variety of media,
         including, but not limped to, copper cables, radio frequencies or
         channels on a high capacity facility.

         6.1.1     Tandem Switching Capability. GTE will provide tandem
                   switching capability at GTE access tandems for traffic
                   between DTI and GTE end offices subtending the GTE access
                   tandem and for traffic between DTI and non-GTE end offices
                   subtending GTE access tandems. GTE will provide the
                   features and functions that are
                   

                                    VII-6

<PAGE>   58

                   centralized in tandem switches including but not limited to
                   call recording, the routing of calls to operator
                   services when technically feasible, and signaling
                   conversion features. 
                   
6.2      Categories/Types. Unbundled transport is provided under rates, terms
         and conditions of the applicable GTE access tariff or local private
         line tariff. 

7.       SS7 Transport and Signaling. SS7 signaling and transport services in
         support of DTI's local exchange services shall be provided in
         accordance with the terms and conditions of Appendix I attached to this
         Agreement and made a part hereof.

7.1      GTE will provide interconnection with its SS7 at the STPs but not at
         other points. 

8.       LIDB Services. Access to GTE's LIDB shall be provided in accordance
         with the rates, terms and conditions of GTE's switched access tariff,
         GTOC Tariff FCC No. 1, Section 8. 

9.       Database 800-Type Services. Access to GTE's 800-Type database (i.e.,
         888, 877) shall be provided in accordance with the rates, terms and
         conditions of GTE's switched access tariff, GTOC Tariff FCC No. 1,
         Section 8. 

10.      Data Switching. 

10.1     Access. GTE will provide unbundled access to GTE data switches to DTI
         at the user network interface ("UNI") and network to network interface
         ("NNI") level subject to mutual agreement on technical standards.

10.2     Nondiscrimination. Data switching features and functionalities provided
         to DTI will be without discrimination with respect to the way GTE
         provides them to GTE end users. In the event of overflow or congestion
         conditions on the data switching network, DTI's data traffic carried on
         GTE facilities will be equal priority to GTE data traffic. 

10.3     Testing, Monitoring, Administration and Maintenance. Testing,
         monitoring, administration and maintenance will be performed by GTE in
         a nondiscriminatory manner.

11.      Digital Cross Connect System (DCS).

11.1     Access. GTE will provide unbundled access to the DCS element, which
         shall provide automated cross-connection (with CNC), facility grooming,
         bridging (MJU-digital), point to multipoint connections (DMB-analog),
         broadcast and automated facility test capabilities. These
         functionalities will be provided consistent with that which is provided
         to GTE end users. DTI shall submit a Bona Fide Request to GTE
         specifying these functionalities. 

11.2     Optional Characteristics. The DCS element may include multiplexing,
         format conversion, signaling conversion and manual cross connection
         wiring.

11.3     Alternate Provisioning. Where no automated DCS capability exists, the
         cross connection function will be provided manually by GTE through the
         combination of DSX patch panels and D4 banks or DS0 (or higher
         capacity) equipment. 

11.4     Elements. DTI will have access to the following DCS elements: 

         (a)  DS0 with DS1 interface (CNC)




                                    VII-7
<PAGE>   59

         (b)  DS1/VT1.5 with DS1, DS3 and SONET interfaces (CNC and Titan 5500)

11.5     Capabilities. The DCS elements will provide the following capabilities:

         (a)  Real-time configuration (with CNC) 

         (b)  Real-time access to integrated test equipment (with React and 
              Customer Service) 

         (c)  SONET asynchronous gateway functionality (with Titan 5500 only) 

         (d)  Compliance with Bellcore and industry standards. 

11.6     Protection and Performance. The unbundled DCS elements provided to DTI
         will have equipment/interface protection, redundant power supply and/or
         battery backup and performance/availability consistent with that
         provided to GTE end users.

11.7     Provisioning, Administration and Maintenance. GTE will provide
         provisioning, administration and maintenance of the DCS elements the
         same level as GTE provides to itself as well as real time access to
         performance monitoring and alarm data affecting DTI traffic (with CNC).
         GTE is not required to keep software updated to the "current available
         release" in every instance. 

12.      Operator Services (OS) and Directory Assistance (DA). GTE will provide
         OS and DA to DTI in accordance with the terms set forth as follows:

         12.0.1    Where Customized Routing is available, GTE will offer
                   unbranded OS and DA or rebranded OS and DA with the DTI
                   brand. GTE will provide such unbranding or rebranding on
                   a switch-by-switch basis, subject to capability and
                   capacity limitations. Upon receipt of an order for
                   unbranding or rebranding, GTE will implement within 90
                   Business Days when technically capable.
                
         12.0.2    DTI will be billed an element charge for OS and DA and a
                   charge for unbranding or rebranding and Customized
                   Routing as set forth in Section 12.1.2. In addition,
                   charges specified in Section 12.1.4 will apply.
                
         12.0.3    For those offices that DTI has requested GTE to rebrand
                   and/or unbrand OS and DA, GTE will provide it using live
                   operators where GTE performs its own OS and DA service and
                   where handled by automated systems. If GTE uses a
                   Third Party contractor to provide OS or DA, GTE will not
                   provide branding nor will GTE negotiate it with a Third
                   Party on behalf of DTI. DTI must negotiate with the Third
                   Party. In these instances, DTI will need to purchase
                   customized routing to differentiate OS/DA traffic between
                   GTE's and a Third Party. 

12.1     Customized Routing. Where technically feasible and upon receipt of
         written request from DTI, GTE agrees to provide customized routing for
         the following types of calls: 


                             0-                                               
                             0+Local                                          
                             0+411                                            
                             1+411                                            
                             0+HNPA-555-1212 (intraLATA, only when intraLATA  
                             presubscription is not available)                
                             1+HNPA-555-1212 (intraLATA, only when intraLATA  
                             presubscription is not available)                
                                                                              
                                     VII-8                                   
                                                                             
<PAGE>   60
                                       

         12.1.1    GTE will provide DTI a list of switches that can provide
                   customized routing using line class codes or similar method  
                   (regardless of current capacity limitations). DTI will
                   return a list of these switches ranked in priority order.
                   GTE will return to DTI a schedule for customized routing in
                   the switches with existing capabilities and capacity. 
                
         12.1.2    Upon written request from DTI, GTE will provide DTI with
                   applicable charges, and terms and conditions, for providing
                   OS and DA, branding, and Customized Routing.
                
         12.1.3    Subject to the above provisions, GTE will choose the 
                   method of implementing customized routing of OS and DA 
                   calls. 
                
         12.1.4    The use of customized routing will require the purchase of
                   a trunk side port and dedicated facilities between the GTE 
                   end office and the designated OS/DA platform. The rates for
                   these elements will be billed in accordance with Appendix
                   G. 

13.      Advanced Intelligent Network Access (AIN). GTE will provide DTI access
         to GTE AIN functionality from GTE's AIN SCP via GTE's local switch or
         DTI's local switch. 

14.      Nondiscrimination Provision and Support. GTE agrees to provide
         unbundled network elements in a timely manner considering the need and
         volume of requests. GTE will provide unbundled network elements in a
         non-discriminatory manner and shall provide power to such elements on
         the same basis as GTE provides to itself. 

15.      Provisioning Intervals. GTE agrees to provide unbundled network
         elements in a timely manner considering the need and volume of
         requests, pursuant to agreed upon service provisioning intervals. 

16.      Directory Assistance Listing. When DTI orders an unbundled port, a
         Directory Service Request (DSR) must be submitted to have the listing
         included in GTE's Directory Assistance database. The applicable
         ordering charge will be applied for processing the DSR.





                                     VII-9
<PAGE>   61
                                  ARTICLE VIII
            ADDITIONAL SERVICES AND COORDINATED SERVICE ARRANGEMENTS


1.       Bona Fide Request Process.

1.1      Intent. The Bona Fide Request process is intended to be used when DTI
         requests customized Service Orders for certain services, features,
         capabilities or functionality defined and agreed upon by the Parties as
         services to be ordered as Bona Fide Requests.

1.2      Process.

  1.2.1  A Bona Fide Request shall be submitted in writing by DTI and shall
         specifically identify the need to include technical requirements, space
         requirements and/or other such specifications that clearly define the
         request such that GTE has sufficient information to analyze and prepare
         a response.

  1.2.2  Although not expected to do so, DTI may cancel a Bona Fide Request in
         writing at any time prior to DTI and GTE agreeing to price and
         availability. GTE will then cease analysis of the request.

  1.2.3  Within two (2) Business Days of its receipt, GTE shall acknowledge in
         writing the receipt of the Bona Fide Request and identify a single
         point of contact and any additional information needed to process the
         request. 

  1.2.4  Except under extraordinary circumstances, within ten (10) Business Days
         of its receipt of a Bona Fide Request, GTE shall provide a proposed
         price and availability date, or it will provide an explanation as to
         why GTE elects not to meet DTI's request. If extraordinary
         circumstances prevail, GTE will inform DTI as soon as it realizes that
         it cannot meet the ten (10) Business Day response due date. DTI and GTE
         will then determine a mutually agreeable date for receipt of the
         request. 

  1.2.5  Unless DTI agrees otherwise, all proposed prices shall be consistent
         with the pricing principles of the Act, FCC and/or the Commission.
         Payments for services purchased under a Bona Fide Request will be made
         upon delivery, unless otherwise agreed to by DTI, in accordance with
         the applicable provisions of the Agreement. 

  1.2.6  Upon affirmative response from GTE, DTI will submit in writing its
         acceptance or rejection of GTE's proposal. If at any time an agreement
         cannot be reached as to the terms and conditions or price of the
         request GTE agrees to meet, the Dispute resolution procedures described
         in Article III herein may be used by a Party to reach a resolution. 

2.       Transfer of Service Announcements. For services other than GTE resold
         and ported number services, when an end user customer transfers service
         from one Party to the other Party, and does not retain its original
         telephone number, the Party formerly providing service to the end user
         will provide, upon request and if such service is provided to its own
         customers, a referral announcement on the original telephone number.
         This announcement will provide the new number of the customer and will
         remain in effect for the same time period this service is provided to
         GTE's own end users. For GTE resold and ported number services, GTE
         shall provide an intercept referral on behalf of DTI. 

3.       Misdirected Calls. The Parties will employ the following procedures for
         handling any misdirected calls (e.g., Business office, repair bureau,
         etc.). 



                                    VIII-1
<PAGE>   62
3.1      To the extent the correct provider can be determined, each Party will
         refer misdirected calls to the proper provider of local exchange
         service. When referring such calls, both Parties agree to do so in a
         courteous manner, at no charge.
  
3.2      For misdirected repair calls, the Parties will provide their respective
         repair bureau contact number to each other on a reciprocal basis and
         provide the end user the correct contact number.
  
3.3      In responding to misdirected calls, nether Party shall make disparaging
         remarks about each other, nor shall they use these calls as a basis for
         internal referrals or to solicit end users or to market services.
  
4.       911/E911 Arrangements.
  
4.1      Description of Service. DTI will install a minimum of two (2) dedicated
         trunks to GTE's 911/E911 selective routers (i.e., 911 tandem offices)
         that serve the areas in which DTI provides Exchange Services, for the
         provision of 911/E911 services and for access to all subtending PSAPs.
         The dedicated trunks shall be, at a minimum, DS-0 level trunks
         configured as a 2-wire analog interface or as part of a digital (1.544
         Mbps) interface in which all circuits are dedicated to 9-1-1 traffic.
         Either configuration shall use CAMA type signaling with multifrequency
         ("MF") tones that will deliver ANI with the voice portion of the call.
         GTE will provide DTI with the appropriate CLLI codes and specifications
         of the tandem office serving area or the location of the primary PSAP
         when there is no 911 routing in that 911 district. If a DTI central
         office serves end users in an area served by more than one (1) GTE
         911/E911 selective router, DTI will install a minimum of two (2)
         dedicated trunks in accordance with this Section to each of such
         911/E911 selective routers or primary PSAP.
  
4.2      Transport. If DTI desires to obtain transport from GTE to the GTE 911
         selective routers, DTI may purchase such transport from GTE at the
         rates set forth in Appendix H. 
  
4.3      Cooperation and Level of Performance. The Parties agree to provide
         access to 911/E911 in a manner that is transparent to the end user. The
         Parties will work together to facilitate the prompt, reliable and
         efficient interconnection of DTI's systems to the 911/E911 platforms,
         with a level of performance that will provide the same grade of service
         as that which GTE provides to its own end users. To this end, GTE will
         provide documentation to DTI showing the correlation of its rate
         centers to its E911 tandems at rates set forth in Appendix H. 
  
4.4      Basic 911 and E911 General Requirements: 

         4.4.1     Basic 911 and E911 provides a caller access to the
                   appropriate emergency service bureau by dialing a 3-digit
                   universal telephone number (911).

         4.4.2     Where GTE has a 911 selective router installed in the
                   network serving the 911 district, GTE shall use subscriber
                   data derived from the Automatic Location
                   Identification/Database Management System (ALI/DMS) to
                   selectively route the 911 call to the Public Safety
                   Answering Point (PSAP) responsible for the caller's
                   location.
                   
         4.4.3     All requirements for E911 also apply to the use of SS7 as a
                   type of signaling used on the interconnection trunks from
                   the local switch to an end office or a selective router.
                   
         4.4.4     Basic 911 and E911 functions provided to DTI shall be at
                   least at parity with the support and services that GTE
                   provides to its subscribers for such similar functionality.
                   
                                     VIII-2
<PAGE>   63
         4.4.5     Basic 911 and E911 access from Local Switching shall be
                   provided to DTI in accordance with the following:

                   4.4.5.1   GTE and DTI shall conform to all state regulations
                             concerning emergency services.

                   4.4.5.2   For E911, both DTI and GTE shall use their
                             respective service order processes to update access
                             line subscriber data for transmission to the
                             database management systems. Validation will be
                             done via MSAG comparison listed in Section
                             4.4.5.5. 

                   4.4.5.3   If legally required by the appropriate
                             jurisdiction, GTE shall provide or overflow 911
                             traffic to be routed to GTE Operator Services or,
                             at DTI's discretion, directly to DTI Operator
                             Services.

                   4.4.5.4   Basic 911 and E911 access from the DTI local switch
                             shall be provided from GTE to DTI in accordance
                             with the following:

                             4.4.5.4.1      If required by DTI and technically  
                                            feasible, GTE shall interconnect
                                            direct trunks from the DTI network
                                            to the E911 PSAP, or to the E911
                                            selective routers as designated by
                                            DTI. Such trunks may alternatively
                                            be provided by DTI.

                             4.4.5.4.2      In government jurisdictions where
                                            GTE has obligations under existing
                                            Agreements as the primary provider
                                            of the 911 System to the county
                                            (i.e., "lead telco"), DTI shall
                                            participate in the provision of the
                                            911 System as follows:

                                  4.4.5.4.2.1    Each Party shall be responsible
                                                 for those portions of the 911
                                                 System for which it has
                                                 control, including any
                                                 necessary maintenance to each
                                                 Party's portion of the 911
                                                 System.

                                  4.4.5.4.2.2    DTI and GTE recognize that the
                                                 lead telco in a 911 district
                                                 has the responsibility of
                                                 maintaining the ALI database
                                                 for that district. Each company
                                                 will provide its access line
                                                 subscriber records to the
                                                 database organization of that
                                                 lead telco. DTI and GTE will be
                                                 responsible for correcting
                                                 errors when notified by either
                                                 the 911 district or its
                                                 customer, and then submitting
                                                 the corrections to the lead
                                                 telco. Lead telco database
                                                 responsibilities are covered in
                                                 Section 4.4.5.5 of this
                                                 Article.

                                  4.4.5.4.2.3    DTI shall have the right to
                                                 verify the accuracy of
                                                 information regarding DTI
                                                 customers in the ALI database
                                                 using methods and procedures
                                                 mutually agreed to by the
                                                 Parties. The fee for this
                                                 service shall be determined
                                                 based upon the agreed upon
                                                 solution.

                             4.4.5.4.3      If a Third Party is the primary
                                            service provider to a 911 district,
                                            DTI shall negotiate separately
                                            with such Third Party with regard
                                            to the provision of 911 service to
                                            the agency. All relations between
                                            such
   
                                       
                                     VIII-3
<PAGE>   64
                                            Third Party and DTI are totally     
                                            separate from this Agreement and
                                            GTE makes no representations on
                                            behalf of the Third Party.

                             4.4.5.4.4      If DTI or Affiliate is the primary  
                                            service provider to a 911 district,
                                            DTI and GTE shall negotiate the
                                            specific provisions necessary for
                                            providing 911 service to the agency
                                            and shall include such provisions
                                            in an amendment to this Agreement.

                             4.4.5.4.5      Interconnection and database access 
                                            shall be at rates as set forth in
                                            Appendix H.

                             4.4.5.4.6      GTE shall comply with established,
                                            competitively neutral intervals for
                                            installation of facilities,
                                            including any collocation
                                            facilities, diversity requirements,
                                            etc.

                             4.4.5.4.7      In a resale situation, where it may
                                            be appropriate for GTE to update
                                            the ALI database, GTE shall
                                            update such database with DTI data
                                            in an interval no less than is
                                            experienced by GTE subscribers, or
                                            than for other carriers, whichever
                                            is faster, at no additional cost.

                   4.4.5.5   The following are Basic 911 and E911 Database
                             Requirements:

                             4.4.5.5.1      The ALI database shall be managed
                                            by GTE, but is the property of GTE
                                            and any participating LEC or DTI
                                            which provides their records to
                                            GTE.
                                         
                             4.4.5.5.2      Copies of the MSAG shall be
                                            provided within five (5) business
                                            days after the date the
                                            request is received and provided on
                                            diskette or paper copy at the rates
                                            set forth in Appendix H.
                                          
                             4.4.5.5.3      DTI shall be solely responsible for 
                                            providing DTI database records to
                                            GTE for inclusion in GTE's ALI
                                            database on a timely basis.
                                          
                             4.4.5.5.4      GTE and DTI shall arrange for the
                                            automated input and periodic
                                            updating of the E911 database
                                            information related to DTI end
                                            users. GTE shall work cooperatively
                                            with DTI to ensure the accuracy of
                                            the data transfer by verifying it
                                            against the Master Street Address
                                            Guide ("MSAG"). GTE shall accept
                                            electronically transmitted files or
                                            magnetic tape that conform to
                                            National Emergency Number
                                            Association ("NENA") Version #2
                                            format.

                             4.4.5.5.5      DTI shall assign an E911 database   
                                            coordinator charged with the
                                            responsibility of forwarding DTI
                                            end user ALI record information to
                                            GTE or via a third-party entity,
                                            charged with the responsibility of
                                            ALI record transfer. DTI assumes
                                            all responsibility for the accuracy
                                            of the data that DTI provides to
                                            GTE.
                                          
                             4.4.5.5.6      GTE shall update the database
                                            within one (1) business day of
                                            receiving the data from DTI.
                                            If GTE detects an error in the DTI
                                            provided data, the data shall be
                                            returned to DTI within one day from
                                            when it was provided to GTE. DTI
                                            shall respond to requests from GTE
                                            to make corrections to database
                                            record errors by 

                                     VIII-4
<PAGE>   65


                                            uploading corrected records within  
                                            one day. Manual entry shall be
                                            allowed only in the event that the
                                            system is not functioning properly.

                             4.4.5.5.7      GTE agrees to treat all data on DTI 
                                            subscribers provided under this
                                            Agreement as strictly confidential
                                            and to use data on DTI subscribers
                                            only for the purpose of providing
                                            E911 services.
                                         
                             4.4.5.5.8      GTE shall adopt use of a Carrier
                                            Code (NENA standard five-character
                                            field) on all ALI records
                                            received from DTI. The Carrier Code
                                            will be used to identify the
                                            carrier of record in NP
                                            configurations. The NENA Carrier
                                            Code for DTI is "DTI"; the NENA
                                            Carrier Code for GTE is "GTE." 

                   4.4.5.6   GTE and DTI will comply with the following
                             requirements for network performance, maintenance
                             and trouble notification.
                                         
                             4.4.5.6.1      Equipment and circuits used for 911
                                            shall be monitored at all times.    
                                            Monitoring of circuits shall be
                                            done to the individual trunk level.
                                            Monitoring shall be conducted by
                                            GTE for trunks between the
                                            selective router and all associated
                                            PSAPs. 

                             4.4.5.6.2      Repair service shall begin
                                            immediately upon report of a
                                            malfunction. Repair service
                                            includes testing and diagnostic
                                            service from a remote location,
                                            dispatch of or in-person visit(s)
                                            of personnel. Where an on-site
                                            technician is determined to be
                                            required, a technician will be
                                            dispatched without delay. 

                             4.4.5.6.3      GTE shall notify DTI forty-eight
                                            (48) hours in advance of any
                                            scheduled testing or maintenance
                                            affecting DTI 911 service. GTE
                                            shall provide notification as soon
                                            as possible of any unscheduled
                                            outage affecting DTI 911 service. 

                             4.4.5.6.4      All 911 trunks must be capable of
                                            transporting Baudot Code necessary
                                            to support the use of
                                            Telecommunications Devices for the
                                            Deaf ("TTY/TDDs").
                                         
                   4.4.5.7   Basic 911 and E911 Additional Requirements

                             4.4.5.7.1      All DTI lines that have been ported
                                            via INP shall reach the correct
                                            PSAP when 911 is dialed. Where
                                            GTE is the lead telco and provides
                                            the ALI, the ALI record will
                                            contain both the DTI number and GTE
                                            ported number. The PSAP attendant
                                            shall see both numbers where the
                                            PSAP is using a standard ALI
                                            display screen and the PSAP
                                            extracts both numbers from the data
                                            that is sent. GTE shall cooperate
                                            with DTI to ensure that 911 service
                                            is fully available to all DTI end
                                            users whose telephone numbers have
                                            been ported from GTE, consistent
                                            with State provisions.

                             4.4.5.7.2      DTI and GTE shall be responsible
                                            for reporting all errors, defects
                                            and malfunctions to one another.
                                            GTE and DTI shall provide each
                                            other with a point of contact for
                                            reporting errors, defects, and 


                                     VIII-5
<PAGE>   66
                                            malfunctions in the service and
                                            shall also provide escalation
                                            contacts.
                                         
                             4.4.5.7.3      DTI may enter into subcontracts with
                                            third parties, including DTI        
                                            Affiliates, for the performance of
                                            any of DTI's duties and obligations
                                            stated herein.

                             4.4.5.7.4      Where GTE is the lead telco, GTE
                                            shall provide DTI with notification
                                            of any pending selective router
                                            moves within at least ninety (90)
                                            days in advance.
                                         
                             4.4.5.7.5      Where GTE is the lead telco, GTE
                                            shall establish a process for
                                            the management of NPA splits by
                                            populating the ALI database with the
                                            appropriate new NPA codes.

                             4.4.5.7.6      Where GTE is the lead telco, GTE
                                            shall provide the ability for DTI to
                                            update 911 database with end
                                            user information for lines that have
                                            been ported via INP or LNP.
                                         
         4.4.6     Basic 911 and E911 Information Exchanges and interfaces. 
                   Where GTE is the lead telco:

                   4.4.6.1   GTE shall provide DTI access to the ALI Gateway
                             which interfaces to the ALI/DMS database. GTE shall
                             provide error reports from the ALI/DMS database to
                             DTI within one (1) day after DTI inputs information
                             into the ALI/DMS database. Alternately, DTI may
                             utilize GTE or a Third Party entity to enter
                             subscriber information into the database on a
                             demand basis, and validate subscriber information
                             on a demand basis. The rates are set forth in
                             Appendix H.
                                         
                   4.4.6.2   GTE and DTI shall arrange for the automated input
                             and periodic updating of the E911 database
                             information related to DTI end users. GTE shall
                             work cooperatively with DTI to ensure the accuracy
                             of the data transfer by verifying it against the
                             Master Street Address Guide ("MSAG"). GTE shall
                             accept electronically transmitted files or magnetic
                             tape that conform to National Emergency Number
                             Association ("NENA") Version #2 format.
                                        
                   4.4.6.3   Updates to MSAG. Upon receipt of an error recording
                             an DTI subscriber's address from GTE, and where GTE
                             is the lead telco, it shall be the responsibility
                             of DTI to ensure that the address of each of its
                             end users is included in the Master Street Address
                             Guide ("MSAG") via information provided on DTI's
                             Local Service Request ("LSR") or via a separate
                             feed established by DTI pursuant to Section 4.4.5.7
                             of this Article.

                   4.4.6.4   The ALI database shall be managed by GTE, but is
                             the property of GTE and all participating telephone
                             companies. The interface between the E911 Switch or
                             Tandem and the ALI/DMS database for DTI subscriber
                             shall meet industry standards.

4.5      Compensation. In situations in which GTE is responsible for maintenance
         of the 911/E911 database and can be compensated for maintaining DTI's
         information by the municipality, GTE will seek such compensation from
         the municipality. GTE will seek compensation from DTI only if, and to
         the extent, that GTE is unable to obtain such compensation from the
         municipality. GTE 

                                     VIII-6
<PAGE>   67

         shall charge DTI a portion of the cost of the shared 911/E911 selective
         router as set forth in Appendix H.

5.       Information Services Traffic. 

5.1      Routing. Each Party shall route traffic for Information Services (i.e.
         900-976, Internet, weather lines, sports providers, etc.) which
         originates on its network to the appropriate Information Service
         Platform. 

5.2      Billing and Collection and Information Service Provider (ISP) 
         Remuneration.

         5.2.1     In the event GTE performs switching of ISP traffic 
                   associated with resale or unbundled network elements for
                   DTI, GTE shall provide to DTI  GTE's standard call
                   detail records so as to allow DTI to bill its end users.
                   GTE shall not be responsible or liable to DTI or ISP for
                   Billing and Collection and/or any receivables of Information
                   Service Providers.
         
         5.2.2     Notwithstanding and in addition to Article III, Section 24,
                   GTE shall be indemnified and held harmless by CLEC from and
                   against any and all suits, actions, losses, damages,
                   claims, or liability of any character, type, or description,
                   including all expenses of litigation and court cost which may
                   arise as a result of the provisions contained in this Article
                   VIII, Section 5.2.1 supra. The indemnity contained in this
                   section shall survive the termination of this Agreement, for
                   whatever reason.

         5.2.3     GTE agrees to notify DTI in writing within __ working days, 
                   by registered or certified mail at __ of any claim made 
                   against GTE on the obligations indemnified against pursuant
                   to this Article VIII, Section 5.

         5.2.4     It is understood and agreed that the indemnity provided for
                   in this Article VIII, Section 5 is to be interpreted and
                   enforced so as to provide indemnification of liability to GTE
                   to the fullest extent now or hereafter permitted by law.

5.3      900-976 Call Blocking. GTE shall not unilaterally block 900-976 traffic
         in which GTE performs switching associated with resale or unbundled
         network elements. GTE will block 900-976 traffic when requested to do
         so, in writing, by DTI. DTI shall be responsible for all cost
         associated with the 900-976 call blocking request. GTE reserves the
         right to block any and all calls which may harm or damage its network.
         
5.4      Miscellaneous. GTE reserves the right to provide to any Information
         Service Provider a list of any and all Telecommunications Providers
         doing business with GTE.

6.       Telephone Relay Service. Local and intraLATA Telephone Relay Service
         ("TRS") enables deaf, hearing-impaired, or speech-impaired TRS users to
         reach other telephone users. With respect to resold services, DTI's end
         users will have access to the state authorized TRS provider to the
         extent required by the Commission, including any applicable
         compensation surcharges.

7.       Directory Assistance (DA) and Operator Services (OS). Where DTI is
         providing local service with its own switch, upon DTI's request GTE
         will provide to DTI rebranded or unbranded directory assistance
         services and/or operator services pursuant to separate contracts to be
         negotiated in good faith between the Parties. If DTI so requests
         directory assistance services and/or operator services, such contracts
         shall provide for the following:

7.1      Directory Assistance Calls. GTE directory assistance centers shall
         provide number and addresses to DTI end users in the same manner that
         number and addresses are provided to 


                                     VIII-7
<PAGE>   68
         GTE end users. If information is provided by an automated response unit
         ("ARU"), such information shall be repeated twice in the same manner in
         which it is provided to GTE end users. Where available, GTE will
         provide call completion to DTI end users in the same manner that call
         completion is provided to GTE end users. GTE will provide its existing
         services to DTI end users consistent with the service provided to GTE
         end users.

7.2      Operator Services Calls. GTE operator services provided to DTI end
         users shall be provided in the same manner GTE operator services are
         provided to GTE end users. In accordance with GTE practices and at GTE
         rates, GTE will offer to DTI end users collect, person-to-person,
         station-to-station calling, Third Party billing, emergency call
         assistance, calling card services, credit for calls, time and charges,
         notification of the length of call, and real time rating. GTE operators
         shall also have the ability to quote DTI rates upon request but only if
         there is appropriate cost recovery to GTE and to the extent it can be
         provided within the technical limitations of GTE's switches. GTE will
         provide its existing services to DTI end users consistent with the
         service GTE provides to its own end users. 

8.       Directory Assistance Listings Information. GTE will include listings in
         its directory assistance database for DTI end users in the same
         geographic area as GTE provides directory assistance for GTE end users
         as specified in Article VI, Section 3.4.

8.1      GTE shall provide to DTI, at DTI's request, for purposes of DTI
         providing DTI-branded directory assistance services to its local
         customers, within sixty (60) Business Days after an order for such tape
         is received, all published DA listings for that specific state via
         magnetic tape. Such listings will be Confidential Information under
         this Agreement and DTI will use the listings only for its directory
         assistance services to its end users. If DTI uses a Third Party
         directory assistance service to its end users, DTI will ensure that
         such Third Party likewise treats the listings as Confidential
         Information under this Agreement, and uses them only for such directory
         assistance. Changes to the DA Listing Information shall be updated on a
         daily basis through the same means used to transmit the initial list.
         DA Listing Information provided shall indicate whether the customer is
         a residence or business customer. The rate to be paid by DTI to GTE
         will be reasonable and mutually agreed upon.

8.2      The Parties will not release DA Listing Information that includes the
         other Party's end user information to Third Parties without the other
         Party's written approval. The other Party will inform the Releasing
         Party if it desires to have the Releasing Party provide the other
         Party's DA Listing Information to the Third Party, in which case, the
         Releasing Party shall provide the other Party's DA Listing Information
         at the same time as the Releasing Party provides the Releasing Party's
         DA Listing Information to the Third Party. The rate to be paid by the
         Releasing Party to the other Party shall be no more than the direct
         costs of compiling such information. The other Party shall be
         responsible for billing the Third Party.

8.3      The Parties will work together to identify and develop procedures for
         database error corrections.

9.       Directory Listings and Directory Distribution. DTI will be required to
         negotiate a separate agreement for directory listings and directory
         distribution, except as set forth below, with GTE's directory
         publication company. 

         Listings. DTI agrees to supply GTE on a regularly scheduled basis, at
         no charge, and in a mutually agreed upon format (e.g. Ordering and
         Billing Forum developed), all listing information for DTI's subscribers
         who wish to be listed in any GTE published directory for the relevant
         operating area. Listing information will consist of names, addresses
         (including city, state and zip code) and telephone numbers. Nothing in
         this Agreement shall require GTE to publish a directory where it would
         not otherwise do so. 


                                     VIII-8
<PAGE>   69
         Listing inclusion in a given directory will be in accordance with GTE's
         solely determined directory configuration, scope, and schedules, and
         listings will be treated in the same manner as GTE's listings.

         Distribution. Upon directory publication, GTE will arrange for the
         initial distribution of the directory to service subscribers in the
         directory coverage area at no charge. 

         DTI will supply GTE in a timely manner with all required subscriber
         mailing information including non-listed and non-published subscriber
         mailing information, to enable GTE to perform its distribution
         responsibilities. 

10.      Busy Line Verification and Busy Line Verification Interrupt. Each Party
         shall establish procedures whereby its operator assistance bureau will
         coordinate with the operator assistance bureau of the other Party to
         provide Busy Line Verification ("BLV") and Busy Line Verification and
         Interrupt ("BLVI") services on calls between their respective end
         users. Each Party shall route BLV and BLVI inquiries over separate
         inward operator services trunks. Each Party's operator assistance
         bureau will only verify and/or interrupt the call and will not complete
         the call of the end user initiating the BLV or BLVI. Each Party shall
         charge the other for the BLV and BLVI services at the rates contained
         in Appendix F, or if there is no applicable rate listed in Appendix F,
         at the rates in their respective tariffs.

11.      SAG. GTE will provide to DTI upon request the Street Address Guide at a
         reasonable charge. Two companion files will be provided with the SAG
         which lists all services and features at all LSOs, and lists services
         and features that are available in a specific LSO.

12.      Dialing Format Changes. GTE will provide reasonable notification to DTI
         of changes to local dialing format, i.e., 7 to 10 digit, by end office.

13.      Operational Support Systems (OSS). GTE shall provide OSS functions to
         DTI for ordering, provisioning and billing that are generally available
         as described in Appendix I attached to this Agreement. DTI shall pay
         GTE for access to GTE's OSS functions consistent with processes defined
         in Appendix I.


                                     VIII-9

<PAGE>   70

                                   ARTICLE IX
                                   COLLOCATION


1.       Physical Collocation. GTE shall provide to DTI physical collocation of
         equipment pursuant to 47 CFR Section 51.323 necessary for
         interconnection or for access to unbundled network elements, provided
         that GTE may provide virtual collocation in place of physical
         collocation, or in some cases deny a particular collocation request
         entirely, if GTE demonstrates that physical collocation, or perhaps
         even virtual collocation, is not practical because of technical reasons
         or space limitations, as provided in Section 251(c)(6) of the Act. GTE
         will work with DTI to install collocation arrangements within 120
         calendar days absent extenuating circumstances, GTE will provide such
         collocation for purposes of interconnection or access to unbundled
         network elements pursuant to the terms and conditions in the applicable
         federal and state EIS tariffs.

1.1      Space Planning. In addition to such provisions for space planning and
         reservation as may be set forth in the applicable GTE federal and state
         EIS tariffs, the parties agree to the following terms and conditions.

         1.1.1     GTE has the right to reserve space within its central offices
                   for its own use based on a 5-year planning horizon.

         1.1.2     GTE will notify DTI if it plans to build an addition to a
                   central office where DTI has collocated facilities, if such
                   addition would result in a material increase of space
                   available for collocation.

         1.1.3     Should DTI submit to GTE a two-year forecast for space
                   planning for collocated facilities in a central office, GTE
                   will, in good faith, consider and discuss such forecast with
                   DTI when considering space planning or utilization decisions
                   for such central office; provided, however that any final
                   space planning or utilization decision shall be made by GTE
                   in its sole discretion in light of GTE requirements.

         1.1.4     Subject to technical feasibility and space limitations, GTE
                   will make available at applicable federal and state EIS
                   tariffs such intraoffice facilities as may be necessary to
                   accommodate projected volumes of DTI traffic.

1.2      Connection to Customer LOOPS and Ports. Facilities for cross-connection
         to unbundled loops and ports shall be provided under the applicable GTE
         federal tariff for Special Access Cross Connect, until such time as a
         local tariff applicable to the facilities used for such
         cross-connection is filed.

1.3      Connection to Other Collocated Carriers. Subject to technical
         feasibility and space limitations, DTI may interconnect with other
         carriers collocated at a GTE central office at which DTI has collocated
         facilities; provided, however, that DTI and such other carriers must be
         collocated at the GTE central office for the primary purpose of
         interconnecting with GTE or accessing GTE's unbundled network elements.
         If DTI wants to interconnect with other carriers collocated at a GTE
         central office, DTI must provide GTE with thirty Business Days' prior
         written notice, during which time GTE may elect to provide the
         facilities necessary to accomplish such interconnection. DTI and the
         other collocated carriers may provide the necessary interconnection
         facilities only if GTE elects not to provide such facilities or fails
         to so elect within the thirty day notice period. If GTE elects to
         provide interconnection facilities under this section, GTE will provide
         this cross connection under the GTE federal tariff for Special Access
         Cross Connect, until such time as a local tariff applicable to the
         facilities used for such interconnection facilities is filed.

                                      IX-1
<PAGE>   71
1.4      Choice of Vendor. DTI may use the vendor of its choice to install,
         maintain and repair equipment within DTI's collocated space. Access by
         the employees, agents or contractors of such vendor shall be subject to
         the same restrictions on access by employees, agents or contractors of
         DTI imposed under the applicable GTE federal and state EIS tariffs,
         including but not limited to certification and approval by GTE. 

1.5      Monitoring. Subject to technical feasibility and space limitations, DTI
         may extend its own facilities for remote monitoring of its collocated
         equipment to its collocated space. DTI may request that GTE provide the
         facilities necessary for such remote monitoring, at which time GTE and
         DTI will negotiate in good faith the price, terms and conditions of
         remote monitoring by GTE.

1.6      Phone Service. Upon ordering collocated space, DTI may order that its
         collocation cage be provided with plain old telephone service (POTS)
         commencing at such time as GTE has completed construction of the
         collocated space. DTI shall pay separately for any ordered POTS
         service.

1.7      Intraoffice Diversity. At DTI's request, GTE will provide diversity for
         ingress/egress fiber and power cables where such diversity is available
         and subject to technical feasibility and space limitations.

1.8      DTI Proprietary Information. GTE will protect all DTI proprietary
         information to the extent required under non-disclosure agreements
         existing as of the date GTE completes construction of a physical
         collocation space at DTI's request.

1.9      Notification of Modifications. GTE will notify DTI of modifications to
         collocation space in accord with the terms of applicable GTE state and
         federal EIS tariffs. Additionally, GTE shall notify DTI when major
         upgrades are made to the power plants supporting DTI's collocation
         space. The following shall constitute such major upgrades:

         (a)  replacement of a rectifier;

         (b)  addition or replacement of a new fusing module;

         (c)  addition or replacement of a power distribution unit frame; or

         (d)  addition or replacement of modular rectifiers.

1.10     Drawings. When DTI orders collocated space, GTE and DTI will hold a
         GTE/Customer meeting in accord with applicable GTE state and federal
         EIS tariffs. At such meeting, GTE will provide such drawings of GTE's
         central office facility as may be necessary to adequately depict DTI's
         proposed collocation space.

1.11     Construction of Space. GTE will construct DTI's collocation space in
         accord with the terms and conditions set forth in the applicable GTE
         state and federal EIS tariff. Additionally, GTE agrees to the following
         terms and conditions regarding construction of collocated space:

         1.11.1    Space will be constructed in 100 square foot increments, and
                   shall be designed so as to prevent unauthorized access.
         
         1.11.2    a standard 100 square foot cage shall have the following
                   standard features:

                   (a)  eight-foot high, nine gauge chain link panels;


                                      IX-2
<PAGE>   72
                   (b)  three of the panels listed at (a) above shall measure
                        eight by ten feet, the fourth panel shall measure eight
                        by seven feet;

                   (c)  the door to the cage shall measure eight by three feet
                        and shall also consist of nine gauge chain link;

                   (d)  the cage shall be provided with one padlock set, with 
                        GTE retaining one master key;

                   (e)  one ac electrical outlet;

                   (f)  one charger circuit system;

                   (g)  one electrical sub-panel;

                   (h)  such additional lighting as may be necessary;

                   (i)  one fire detection requirement evaluation;

                   (j)  grounding for the cage consistent with COEI.

         1.11.3    Modifications to the standard configuration set forth in
                   Section 1.11.2 can be made on an individual case basis. If
                   modifications are agreed upon and made by the Parties, GTE
                   will work with DTI to implement such additional modifications
                   as may be necessary to ensure that DTI's collocated space is
                   protected from unauthorized access.

         1.11.4    At such time as construction of DTI's collocation space is
                   approximately 50 percent completed, GTE will give DTI
                   notification, and such notification shall include scheduled
                   completion and turnover dates.
 
         1.11.5    Upon completion of construction of collocated space, GTE will
                   conduct a walk through of the collocated space with DTI.
                   Should DTI note any deviations from the plan agreed upon by
                   GTE and DTI at the customer meeting, and if such deviations
                   were not requested by DTI or not required by law, GTE shall
                   correct such deviations at its own expense within 5 Business
                   Days.

1.12     Connection Equipment. DTI may provision equipment for the connection of
         DTI termination equipment to GTE equipment using either of the
         following methods:

         1.12.1    DTI may extend an electrical or optical cable from the
                   terminal within DTI's collocation cage and terminate that
                   cable at GTE's network.
 
         1.12.2    DTI may install a patch panel within its collocation cage and
                   then hand the cabling to GTE to extend to and have GTE
                   terminate that cable at GTE's network.
 
1.13     Access to DTI Collocation Space. The terms and conditions of access to
         DTI's collocation space shall be as set forth in applicable GTE state
         and federal EIS tariffs. Additionally, GTE agrees that the following
         terms and conditions shall apply to access:

         1.13.1    GTE shall implement adequate measures to control access to
                   collocation cages.
 
         1.13.2    Collocation space shall comply with all applicable fire and
                   safety codes.


                                      IX-3
<PAGE>   73
         1.13.3    Doors with removable hinges or inadequate strength shall be
                   monitored by an alarm connected to a manned site. All other
                   alarms monitoring DTI collocation space provided by GTE shall
                   also be connected to a manned site. DTI may, at its option,
                   provide its own intrusion alarms for its collocated space.
                   
         1.13.4    GTE shall control janitorial access to collocation cages, and
                   restrict such access to approved and certified employees,
                   agents or contractors.
 
         1.13.5    GTE shall establish procedures for access to collocation 
                   cages by GTE and non- GTE emergency personnel, and
                   shall not allow access by security guards unless such access
                   comports with this section and is otherwise allowed under
                   applicable GTE state and federal EIS tariffs.

         1.13.6    GTE shall retain a master key to DTI's collocation space for
                   use only in event of emergency as detailed in applicable GTE
                   state and federal tariffs. At DTI's option, the Parties shall
                   review key control procedures no more frequently than once in
                   any twelve month period. At any time, DTI may elect to change
                   keys if it suspects key control has been lost, provided,
                   however, that GTE will be provided with a master key in 
                   accord with this section.

         1.13.7    Not more frequently than once a year, DTI may audit the
                   security and access procedures and equipment applicable to
                   its collocated space and the central office housing the      
                   collocation space. Access by personnel necessary to conduct
                   such an audit shall be limited as set forth in applicable GTE
                   state and federal EIS tariffs. Should DTI identify
                   deficiencies in security and access procedures and equipment
                   as a result of such audit, the cost, terms and conditions of
                   the correction of such deficiencies shall be negotiated in
                   good faith between the parties.

2.       Virtual Collocation. Subject to Section 1 of this Article IX, GTE will
         provide virtual collocation for purposes of interconnection or access
         to unbundled network elements pursuant to the terms and conditions in
         the applicable GTE federal and state EIS tariffs. In addition, GTE
         agrees that the terms and conditions set forth in this Section 2 of
         this Article IX, shall apply to virtual collocation provided to DTI.

2.1      Existing Virtual Collocation. If, on the effective date of this
         Agreement, DTI is virtually collocated in a GTE premise, DTI may (I)
         elect to retain its virtual collocation arrangement in that premise or
         (ii) unless it is not practical for technical reasons or because of
         space limitations, convert its virtual collocation arrangement at that
         premise to physical collocation. If DTI elects the latter option, DTI's
         request shall be treated as a new physical collocation request and DTI
         shall pay GTE at the applicable tariff rates for construction and
         rearrangement of DTI's equipment as well as all applicable tariffed
         physical collocation recurring charges.

2.2      Conversion from Physical to Virtual. Unless it is not practical for
         technical reasons or because of space limitations, DTI may convert a
         physical collocation arrangement to a virtual collocation arrangement.
         DTI's request to do so shall be treated as a new virtual collocation
         request and DTI shall pay GTE at the applicable tariff rates for
         construction and rearrangement of DTI's equipment as well as all
         applicable tariffed virtual collocation recurring charges. If DTI
         elects to change to a virtual collocation arrangement pursuant to this
         section, GTE will not refund previous payments for physical collocation
         received from DTI.
                  
2.3      Vendors. Choice of vendors for equipment used for virtual collocation
         shall be under the terms and conditions set forth in the applicable GTE
         federal and state EIS tariff. Upon request by DTI, 
                  

                                      IX-4
<PAGE>   74
         GTE shall provide a list of locally qualified vendors approved for the
         type of equipment to be collocated.

2.4      Inspection. Upon provision of virtual collocation by GTE, the Parties
         shall agree on a mutually acceptable schedule whereby DTI may inspect
         the equipment in its virtual collocation space.

                                      IX-5
<PAGE>   75


                                    ARTICLE X
               ACCESS TO POLES, DUCTS, CONDUITS AND RIGHTS-OF-WAY


To the extent required by the Act, GTE and DTI shall each afford to the other
access to the poles, ducts, conduits rights of way it owns or controls on terms,
conditions and prices comparable to those offered to any other entity pursuant
to each Parties tariffs and/or standard agreements. Accordingly, GTE and DTI
shall execute pole attachment and conduit occupancy agreements in the form set
forth in Appendices I and J.




                                     X-1
<PAGE>   76


IN WITNESS WHEREOF, each Party has executed this Agreement to be effective as of
the date first above written. 

GTE SOUTHWEST INCORPORATED                  DIGITAL TELEPORT, INC.

By /s/ Connie Nicholas                      By /s/ J.W. Sheehy
  --------------------------------------      ----------------------------------
Name Connie E. Nicholas                     Name J.W. Sheehy
    ------------------------------------        --------------------------------
     Assistant Vice President 
Title Wholesale Markets-Interconnection     Title Vice President IC Support
      ----------------------------------          ------------------------------
          
Date  November 18, 1997                     Date  10/20/97
      ----------------------------------          ------------------------------






        APPROVED AS TO FORM BY
          LEGAL DEPARTMENT
         
               [SIG]
        ----------------------



                                     X-2
<PAGE>   77

                                   APPENDIX A
                          GTE PERFORMANCE MEASURES (PM)


Pursuant to Article III of this Agreement, the following terms and conditions
shall apply regarding the performance measures set forth in this Appendix A. The
Parties recognize that these performance measures are new and evolving, and as
further evolution is made by GTE, the parties will discuss the changed
procedures, including new standard processes and procedures, if any, for the
purpose of applying them to and incorporating them in this Agreement. 

GTE'S PERFORMANCE MEASURES (PMS) as set forth in this Appendix implement
standards to measure the quality of services supplied by GTE with respect to
pre-ordering, order/provisioning, maintenance and billing that is equivalent in
equality to what GTE provides to itself. GTE's PMs contain measures for both GTE
and DTI with the measures for DTI being considered an essential element for GTE
meeting customer expectations.

GTE's PMs are conditioned upon a 150 order per month minimum requirement as
described below for Service Units, as a threshold for providing Financial
Incentives for certain PMs. The 150 order per month requirement for Service
Units was developed to provide a statistically valid sample size to measure
GTE's performance for DTI in relationship to the level of performance GTE
provides to its own customers. Service Units are defined to include unbundled
loops, unbundled ports, resold local service lines, INP ported numbers, and
interconnection trunks.

GTE will begin recording of performance data in the first full month in which it
receives the first official order from DTI. GTE's report of performance measures
to DTI, however, will begin after 6 months of data recording; i.e., for data
recorded in the seventh full month. Each month's report will then be reported as
a rolling 3-month result (i.e., July's report will actually include May, June,
July data). The calculation of DTI performance will be based on this 3 month
rolling average of actual performance unless otherwise specified. 

Reporting will be available monthly, or at a longer interval, as requested by
DTI. The details of report delivery shall be agreed upon between DTI and the
appropriate GTE Account Management group. 

FORECASTING PERFORMANCE MEASUREMENT - GTE's PMs are conditioned upon the
requirement, as described more fully below, that DTI submit timely and accurate
forecasts. The Forecasting PM includes provisions that measure the accuracy of
DTI's forecast by comparing forecasted Service Units to ordered Service Units
for the same period. 

DTI shall furnish a quarterly forecast of service order volumes and quantities
of resold local services, unbundled network elements, and interconnection trunks
on a State-wide basis, identifying these volumes/quantities by month, for each
month included in the quarter. These forecasts shall be received by GTE at least
one month before the beginning of the quarter covered by the forecast. Should
the first month of the next quarterly forecast be greater than ten (10%) percent
of the last month of the current quarterly forecast, DTI shall notify GTE
promptly of the increased order volume. Notification shall be made to the
appropriate GTE Account Management group in order to allow sufficient "lead
time" to ensure staffing levels are available to support the increased order
volumes.

DTI must agree to comply with the requirements of the Forecasting PM as the
basis for the application of Financial Incentives described below. If DTI
chooses not to comply with the Forecasting PM, Financial Incentives will not
apply. For purposes of applying Financial Incentives the accuracy of forecasts
will be determined at the state level.



                                     A-1
<PAGE>   78

The measurement and reporting of GTE's PMs will still be made available
as stated above regardless of DTI's election for the Forecasting PM. 

FINANCIAL INCENTIVES - When DTI agrees to the Forecasting PM described above,
Financial Incentives will begin concurrently with reporting of individual DTI
performance data except as specified below for the
Pre-Ordering/Ordering/Provisioning and Interconnection PMs. 

Financial Incentives will apply to Maintenance/Repair PMs without restriction
other than DTI's participation in the Forecasting PM. 

Financial Incentives will apply to Pre-Ordering/Ordering/Provisioning and
Interconnection PMs subject to DTI's participation in the Forecasting PM and the
required per month ordering threshold. DTI must place a 150 orders per month
minimum for Service Units, by state, for three (3) consecutive months (hereafter
the "150-order requirement"). Once DTI's order volume reaches the "150-order
requirement", a ninety (90) day grace period will begin wherein data will be
accumulated and reviewed. At the end of that ninety (90) day grace period,
applicable Financial Incentives shall apply. The three (3) consecutive months
and the subsequent ninety (90) day grace period may be concurrent with all or
part of the beginning six (6) month period after recording of official data
begins, between initial order activity and the implementation of performance
reporting (i.e., month 7 data).

For purposes of applying Financial Incentives to the Forecasting PM, if DTI's
actual order activity for Service Units in a given month is below the forecast
for that month by more than 10%, Financial Incentives will apply only to the
incremental Service Units that were forecasted but not ordered; i.e., the
difference between the actual quantity ordered and the quantity which reflects
the forecast less 10%. 

For purposes of applying Financial Incentives to the Pre-ordering/Ordering/
Provisioning and Interconnection PM, if DTI's actual order activity for Service
Units in a given month exceeds the forecast for that month by more than 10%,
Financial Incentives will not apply.

Average Non-Recurring Charges - The averages are calculated by dividing the sum
of all non-recurring charges applied to service orders issued by DTI to GTE by
the total number of orders or the total number of Service Units ordered. These
calculations will be made by service activity and service category: Business
(Single/Multi-line, Centranet, PBX, Trunks), Residence, etc.. The average
Non-Recurring Charges will be separately calculated for field work and non-field
work orders. These averages and a weighting factor for field and non-field work
will be calculated during a study period to be mutually agreed between the
Parties. The initial average Non-Recurring Charge calculation will occur within
three (3) months of DTI's initial issuance of official orders. The average
Non-Recurring Charge shall be recalculated annually as mutually agreed between
the Parties. 

Average Recurring Charges - The averages are calculated by dividing
the sum of all recurring charges applied to service orders issued by DTI to GTE
by the total number of orders or Service Units ordered. These averages will be
calculated during a study period to be mutually agreed between the Parties.
These calculations will be made by service activity and service category,
Business, Residence, etc. The initial average Recurring Charge calculation will
occur within three (3) months of DTI's initial issuance of official orders. The
average Recurring Charges shall be recalculated annually as mutually agreed
between the Parties.

                                     A-2
<PAGE>   79


               GTE PERFORMANCE MEASURES WITH FINANCIAL INCENTIVES

                       PRE-ORDERING/ORDERING/PROVISIONING
<TABLE>
<CAPTION>
- ---------------------------------------------------------------------------------------------------------------------

                                                    PERFORMANCE           QUALITY                FINANCIAL
ISSUE NO.       OBLIGATION      DATA LEVEL          MEASURE (PM)          STANDARD               INCENTIVE
- ---------------------------------------------------------------------------------------------------------------------
<S>             <C>             <C>                 <C>                   <C>                    <C>

1               GTE             National            Prompt transmission   85% of CSR's sent to   5% of average NRC
                                                    of Customer Service   DTI by the close of    incurred by DTI
                                                    Record (CSR)          business on business   for the number of
                                                    Information           day following          CSR's for which
                                                                          receipt of request     the Quality
                                                                                                 Standard is not
                                                                                                 met in the
                                                                                                 reported month
- ---------------------------------------------------------------------------------------------------------------------

2               GTE             National            Prompt transmission   85% of LSC's sent to   20% of average NRC
                                                    of Local Service      DTI by the close of    incurred by DTI
                                                    Confirmation (LSC)    business on business   for the lines
                                                                          day following          ordered for which
                                                                          receipt of request     GTE failed to meet
                                                                                                 the Quality
                                                                                                 Standard in the
                                                                                                 reported month
- ---------------------------------------------------------------------------------------------------------------------

3               GTE             State               Due Date              Percent of DTI         Waiver of the
                                                    commitments met       customer install,      average NRC
                                                                          transfer, and change   installation
                                                                          service orders for     charges for the
                                                                          which service is       number of lines by
                                                                          installed by close     which GTE fails to
                                                                          of business on the     meet the Quality
                                                                          committed due date     Standard in the
                                                                          is not more than       reported month
                                                                          2.5% below the
                                                                          percent of GTE
                                                                          customer install,
                                                                          transfer, and change
                                                                          service orders
- ---------------------------------------------------------------------------------------------------------------------
</TABLE>


                                     A-3

<PAGE>   80


<TABLE>
<CAPTION>
- ---------------------------------------------------------------------------------------------------------------------
                                                    PERFORMANCE           QUALITY                FINANCIAL
ISSUE NO.       OBLIGATION      DATA LEVEL          MEASURE (PM)          STANDARD               INCENTIVE
- ---------------------------------------------------------------------------------------------------------------------
<S>             <C>             <C>                 <C>                   <C>                    <C>

4               GTE             State               % reporting trouble   Percent of DTI         One month's
                                                    within 30 days of     customer install,      average MRC per
                                                    the date installed    transfer, and change   trouble report
                                                                          service orders which   exceeding the
                                                                          are followed by a      Quality Standard
                                                                          customer trouble       in the reported
                                                                          report within 30       month (not to
                                                                          days of service        exceed one month's
                                                                          order completion       credit per
                                                                          date is not more       customer line
                                                                          than 2.5% worse than   month)
                                                                          the percent GTE
                                                                          customer install,
                                                                          transfer, and change
                                                                          service orders which
                                                                          are followed by a
                                                                          customer trouble
                                                                          report within 30
                                                                          days of service
                                                                          order completion
- ---------------------------------------------------------------------------------------------------------------------

5               GTE             State               Service Order         80% of LSR's           Payment by DTI to
                                                    discrepancy:  LSR's   initiated by DTI's     GTE equal to 20%
                                                    issued without        do not contain an      of the average NRC
                                                    material errors       order discrepancy or   installation
                                                                          error:  90% in 12      charges for the
                                                                          months.  Final         number of lines
                                                                          target - 95%           which DTI fails to
                                                                                                 meet the Quality
                                                                                                 Standard in the
                                                                                                 reported month
- ---------------------------------------------------------------------------------------------------------------------
</TABLE>

                                     A-4

<PAGE>   81
<TABLE>
<CAPTION>


                                 INTERCONNECTION
- ---------------------------------------------------------------------------------------------------------------------

                                                   PERFORMANCE           QUALITY               FINANCIAL
ISSUE NO.       OBLIGATION      DATA LEVEL         MEASURE (PM)          STANDARD              INCENTIVE
- ---------------------------------------------------------------------------------------------------------------------
<S>             <C>             <C>                <C>                   <C>                   <C>

1               GTE             State              Trunk orders          Percent of trunk      Waiver of 100% of
                                                   completed on or       orders by DTI         average NRC for
                                                   before the            completed by GTE on   trunks ordered fro
                                                   Committed Due Date    or before the         which GTE failed to
                                                                         commitment date is    meet the Quality
                                                                         not more than 10%     Standard in the
                                                                         below the percent     reported month
                                                                         of FG B/D Switched
                                                                         access orders by
                                                                         all ordering
                                                                         companies completed
                                                                         by GTE on or before
                                                                         the commitment date
- ---------------------------------------------------------------------------------------------------------------------

2               GTE             National           Firm Order            Percent of trunk      Waiver of 20%
                                                   Confirmation (FOC)    orders by DTI         average of average
                                                   on time delivery      completed by GTE on   NRC installation for
                                                                         or before the         trunks for which GTE
                                                                         commitment date is    failed to meet the
                                                                         not more than 5%      Quality Standard in
                                                                         below the percent     the reported month
                                                                         of FG B/D Switched
                                                                         access by all
                                                                         ordering companies
                                                                         for which GTE sends
                                                                         FOC (within 5 days,
                                                                         or longer, as
                                                                         requested by DTI)
- ---------------------------------------------------------------------------------------------------------------------
</TABLE>


                                     A-5
<PAGE>   82

<TABLE>
<CAPTION>
- ---------------------------------------------------------------------------------------------------------------------
                                                   PERFORMANCE           QUALITY               FINANCIAL
ISSUE NO.       OBLIGATION      DATA LEVEL         MEASURE (PM)          STANDARD              INCENTIVE
- ---------------------------------------------------------------------------------------------------------------------
<S>             <C>             <C>                <C>                   <C>                   <C>

3               DTI             National           Service Order         80% of ASR's          Charge equal to 20%
                                                   discrepancy:  ASR's   initiated by DTI do   of average NRC
                                                   issued without        not contain           installation of
                                                   material errors       material error or     trunks ordered for
                                                                         result in             which DTI failed to
                                                                         discrepancy; 90% in   meet the Quality
                                                                         12 months.  Final     Standard in the
                                                                         target 95%            reported month
- ---------------------------------------------------------------------------------------------------------------------
</TABLE>


                                     A-6
<PAGE>   83

<TABLE>
<CAPTION>

                               MAINTENANCE/REPAIR
- ---------------------------------------------------------------------------------------------------------------------
                                                   PERFORMANCE           QUALITY               FINANCIAL
ISSUE NO.       OBLIGATION      DATA LEVEL         MEASURE (PM)          STANDARD              INCENTIVE
- ---------------------------------------------------------------------------------------------------------------------
<S>             <C>             <C>                <C>                   <C>                   <C>

1               GTE             State              Percent Commitments   Percent of DTI        One month's flat
                                                   Met                   customer Network      rate average MRC per
                                                                         trouble reports       line out of service
                                                                         where commitment      for which Quality
                                                                         was meet more than    Standard is not met
                                                                         2.5% worse than the   in the reported month
                                                                         percent of GTE's
                                                                         customer Network
                                                                         trouble reports
                                                                         where commitment
                                                                         was met (excluding
                                                                         reports which are
                                                                         cleared CPE, DTI
                                                                         customer error)
- ---------------------------------------------------------------------------------------------------------------------
</TABLE>


                                     A-7
<PAGE>   84


<TABLE>
- ---------------------------------------------------------------------------------------------------------------------
                                                   PERFORMANCE           QUALITY               FINANCIAL
ISSUE NO.       OBLIGATION      DATA LEVEL         MEASURE (PM)          STANDARD              INCENTIVE
- ---------------------------------------------------------------------------------------------------------------------
<S>             <C>             <C>                <C>                   <C>                   <C>
2               GTE             State              Average clearing      Average repair time   One month's flat
                                                   time - Out of         (total number of      rate average MRC per
                                                   Service (OOS) -       elapsed hours/        line OOS for which
                                                   Designed              minutes for OOS DTI   Quality Standard is
                                                                         customer Network      not met in the
                                                                         trouble reports       reported month
                                                                         divided by total
                                                                         number OOS customer
                                                                         Network trouble
                                                                         reports) for DTI
                                                                         customers is more
                                                                         than 10% of the
                                                                         average repair time
                                                                         for GTE customers
                                                                         (includes only
                                                                         "Designed" services)
- ---------------------------------------------------------------------------------------------------------------------
</TABLE>


                                     A-8
<PAGE>   85

<TABLE>
<CAPTION>
- ---------------------------------------------------------------------------------------------------------------------
                                                   PERFORMANCE           QUALITY                FINANCIAL
ISSUE NO.       OBLIGATION      DATA LEVEL         MEASURE (PM)          STANDARD              INCENTIVE
- ---------------------------------------------------------------------------------------------------------------------
<S>             <C>             <C>                <C>                   <C>                   <C>

3               GTE             State              Average clearing      Average repair time   One month's flat
                                                   time - Out of         (total number of      rate average MRC per
                                                   Service (OOS) -       elapsed               line OOS for which
                                                   Non-Designed          hours/minutes for     Quality Standard is
                                                                         OOS DTI customer      not met in the
                                                                         Network trouble       reported month
                                                                         reports divided by
                                                                         total number OOS
                                                                         customer Network
                                                                         trouble reports)
                                                                         for DTI customers
                                                                         is more than 10% of
                                                                         the average repair
                                                                         time for GTE
                                                                         customers (includes
                                                                         only POTS and
                                                                         circuits which do
                                                                         not require a
                                                                         design)
- ---------------------------------------------------------------------------------------------------------------------

4               GTE             State              Percent reports per   Percent of DTI        Within six (6)
                                                   100 (Failure          customers making      months of effective
                                                   Frequency)            trouble reports       date, GTE will have
                                                                         (total number of      established a
                                                                         DTI customer          minimum access line
                                                                         Network trouble       threshold.
                                                                         reports divided by
                                                                         the total access
                                                                         lines multiplied by
                                                                         100) is not worse
                                                                         than .5 percent       One month's flat
                                                                         points of the         rate average MRC per
                                                                         percentage of GTE     line OOS for which
                                                                         customers making      Quality Standard is
                                                                         trouble reports       not met in the
                                                                                               reported month
- ---------------------------------------------------------------------------------------------------------------------
</TABLE>


                                     A-9
<PAGE>   86

<TABLE>
<CAPTION>


- ---------------------------------------------------------------------------------------------------------------------
                                                   PERFORMANCE           QUALITY               FINANCIAL
ISSUE NO.       OBLIGATION      DATA LEVEL         MEASURE (PM)          STANDARD              INCENTIVE
- ---------------------------------------------------------------------------------------------------------------------
<S>             <C>             <C>                <C>                   <C>                   <C>

5               GTE             State              Percent repeat        Percent of DTI        One month's flat
                                                   reports in 30 days    customer repeat       rate average MRC per
                                                                         trouble reports       line OOS for which
                                                                         (total number of      Quality Standard is
                                                                         DTI customer          not met in the
                                                                         Network trouble       reported month
                                                                         reports which had a
                                                                         previous Network
                                                                         trouble report
                                                                         within the last 30
                                                                         days divided by the
                                                                         total of customer
                                                                         Network trouble
                                                                         reports multiplied
                                                                         by 100) is not more
                                                                         than 2.5% worse
                                                                         than the percent of
                                                                         GTE customer repeat
                                                                         trouble reports
- ---------------------------------------------------------------------------------------------------------------------
</TABLE>

**NOTE: OUTAGE CREDITS: LOCAL SERVICE AND UNBUNDLED NETWORK ELEMENTS: OUTAGE
CREDITS APPLY TO INTERRUPTIONS OF LOCAL SERVICES AND UNBUNDLED NETWORK ELEMENTS
IN ACCORDANCE WITH APPLICABLE STATE PUBLIC SERVICE COMMISSION REQUIREMENTS. IF A
LOCAL SERVICE OR UNBUNDLED NETWORK ELEMENT IS INTERRUPTED, DTI WILL BE ENTITLED
TO OUTAGE CREDITS. AN INTERRUPTION PERIOD BEGINS WHEN DTI REPORTS TO GTE THAT A
LOCAL SERVICE OR UNBUNDLED NETWORK ELEMENT IS INTERRUPTED (OR GTE HAS KNOWLEDGE
THAT AN INTERRUPTION HAS OCCURRED THROUGH SERVICE MONITORING OR OTHER MEANS). AN
INTERRUPTION PERIOD ENDS WHEN THE LOCAL SERVICE IS REPAIRED AND RETURNED TO DTI.
A LOCAL SERVICE OR UNBUNDLED NETWORK ELEMENT IS CONSIDERED TO BE INTERRUPTED
WHEN THERE HAS BEEN A LOSS OF CONTINUITY, THE LOCAL SERVICE OR UNBUNDLED NETWORK
ELEMENT DOES NOT OPERATE IN ACCORDANCE WITH THE APPLICABLE SERVICE STANDARDS, OR
IT IS OTHERWISE UNAVAILABLE FOR USE BY DTI. THIS DEFINITION IS NOT INTENDED TO
CONFLICT WITH STATE PUBLIC UTILITY COMMISSION REQUIREMENTS.

                                     A-10
<PAGE>   87

<TABLE>
<CAPTION>


                                   FORECASTING
- ---------------------------------------------------------------------------------------------------------------------

                                                  PERFORMANCE             QUALITY              FINANCIAL
ISSUE NO.       OBLIGATION      DATA LEVEL        MEASURE (PM)           STANDARD              INCENTIVE
- ---------------------------------------------------------------------------------------------------------------------
<S>             <C>             <C>               <C>                    <C>                   <C>

1               DTI             State             Service Units          Volume of DTI's       20% of the average
                                                  requirements           Service Units         NRC for the number
                                                  accurately forecast    requirements in a     of service units
                                                  all volumes for each   month is not          below the forecast
                                                  month contained in     greater than 10%      when the actual
                                                  the quarterly report.  below the amount      volumes are greater
                                                                         forecast by DTI in    than 10% and less
                                                                         it's most recent      than or equal to 30%
                                                                         quarterly forecast    under forecast.  40%
                                                                         (which shall have     of the average NRC
                                                                         been made not later   for the number of
                                                                         than 30 days prior    service units below
                                                                         to the quarter in     the forecast when
                                                                         question)             the actual volumes
                                                                                               are greater than       
                                                                                               30% and less than
                                                                                               or equal to 40%     
                                                                                               under the forecast. 
                                                                                               50% of the average       
                                                                                               NRC for the number  
                                                                                               of service units   
                                                                                               below the forecast
                                                                                               when the actual  
                                                                                               volumes are over    
                                                                                               40% under the     
                                                                                               forecast
                                                                                               
                                                                                               
                                                                                               
                                                                                               
                                                                                               
                                                                                               
                                                                                               
                                                                                               
                                                                                               
                                                                                               
- ---------------------------------------------------------------------------------------------------------------------

</TABLE>


                                    A-11
<PAGE>   88


                                   APPENDIX B
                                 SERVICE MATRIX



Date
    -----------------------

<TABLE>
<CAPTION>
           Service Location
    (identified by tandem serving                     IP                                   Services
                area)                      (identified by CLLI code)            (identified by _________________ )
- -------------------------------------------------------------------------------------------------------------------
<S>                                     <C>                                    <C>
TO BE DETERMINED                        TO BE DETERMINED                       TO BE DETERMINED
</TABLE>


                                     B-1
<PAGE>   89


                                   APPENDIX C
                  INTERCONNECTION, TELECOMMUNICATIONS SERVICES
                            AND FACILITIES AGREEMENT

                                     BETWEEN

                           GTE SOUTHWEST INCORPORATED

                                       AND

                             DIGITAL TELEPORT, INC.

                                  AMENDMENT NO.
                                               ------


THIS AMENDMENT (herein so called) is made effective as of_______________ ,
199_____ , by and between GTE Southwest Incorporated ("GTE") and Digital
Teleport, Inc. ("DTI"). GTE and DTI are sometimes referred to herein
collectively as the "Parties" and individually as a "Party." Either GTE or DTI
may be referred to as "Provider" or "Customer" as the context requires. 

WHEREAS, Provider is providing to Customer and Customer is purchasing from
Provider those Services described in that certain Interconnection,
Telecommunications Services and Facilities Agreement for the State of _______ by
and between GTE and DTI dated effective as of _______________ , 199_____ (the
"Agreement"); and 

WHEREAS, the Parties desire to amend the Agreement as provided in this 
Amendment. 

NOW, THEREFORE, in consideration of the terms and conditions contained in this 
Amendment, the Parties agree as follows: 

1. 

2.       ADDITIONAL SERVICES [IF APPLICABLE]

2.1      Provider agrees to provide to Customer and Customer agrees to purchase
         from Provider the following services under the terms and conditions set
         forth in the Agreement and within the service attachment listed below
         and attached to this Amendment: 

         Service Attachment _____-_________________

2.2      As of the effective date of this Amendment, and continuing through the
         remaining term of the Agreement, _______ is made a part of the Services
         provided under the Agreement and Service Attachment _____ shall be 
         deemed to be a Service Attachment to the Agreement.


2.3      As of the effective date of this Amendment, and continuing through the
         remaining term of the Agreement, Appendix B, Service Matrix, to the
         Agreement is hereby deleted and Appendix B, Service Matrix, to this
         Amendment is hereby inserted in lieu thereof to reflect the additional
         Services and related Service Locations.

3.       SERVICE LOCATIONS [IF APPLICABLE]

3.1      Provider agrees to provide to Customer and Customer agrees to purchase
         from Provider the following Services in the following locations:


                                     C-1
<PAGE>   90

<TABLE>
<CAPTION>
           Service Location                                                                  Services
 (identified by tandem serving area)                     IP                           (identified by Service
                                              (identified by CLLI code)                 Attachment Number)
- -------------------------------------------------------------------------------------------------------------------
<S>                                     <C>                                    <C>
</TABLE>


3.2      As of the effective date of this Amendment, the locations set forth in
         Section 3.1 above shall be deemed Service Locations under the 
         Agreement.

3.3      As of the effective date of this Amendment, and continuing through the
         remaining term of the Agreement, Appendix B, Service Matrix, to the
         Agreement is hereby deleted and Appendix B, Service Matrix, to this
         Amendment is hereby inserted in lieu thereof to reflect additional
         Service Locations.

4.       INTERPRETATION 
         All capitalized terms used but not defined herein shall have the 
         meanings ascribed to such terms in the Agreement.

5.       EFFECT 
         Except as modified herein, the Agreement shall remain in full force 
         and effect.

6.       AUTHORITY 
         Each person whose signature appears below represents and warrants that
         he or she has the authority to bind the Party on whose behalf he or 
         she has executed this Amendment.

7.       MULTIPLE COUNTERPARTS 
         This Amendment may be executed in multiple counterparts, each of which
         shall be deemed an original, and all of which shall constitute but one
         and the same instrument.

8.       NO OFFER 
         Submission of this Amendment for examination or signature does not 
         constitute an offer by Provider for the provision of the products or 
         services described herein. This Amendment will be effective only upon 
         execution by both Provider and Customer.

IN WITNESS WHEREOF, the Parties have executed this Amendment on the date or
dates written below effective as of the date first above written.

GTE SOUTHWEST INCORPORATED                     DIGITAL TELEPORT, INC.



By                                             By
  -----------------------------                  -----------------------------
Name                                           Name
    ---------------------------                    ---------------------------
Title                                          Title
     --------------------------                     --------------------------
Date                                           Date
    ---------------------------                    ---------------------------


                                     C-2
<PAGE>   91

                                   APPENDIX D
                              RATES AND CHARGES FOR
                      TRANSPORT AND TERMINATION OF TRAFFIC


General. The rates contained in this Appendix D are the rates as defined in
Article V and are subject to change resulting from future Commission or other
proceedings, including but not limited to any generic proceeding to determine
GTE's unrecovered costs (e.g., historic costs, contribution, undepreciated
reserve deficiency, or similar unrecovered GTE costs (including GTE's interim
Universal Service Support Surcharge)), the establishment of a competitively
neutral universal service system, or any appeal or other litigation.

Each Party will bill the other Party as appropriate:
 
         A.      The Local Interconnection rate element that applies to Local
                 Traffic on a minute of use basis that each Party switches for
                 termination purposes at its wire centers. The local
                 interconnection rate is $0.0056438.
        
         B.      The Tandem Switching rate element that applies to tandem routed
                 Local Traffic on a minute of use basis. This rate includes
                 tandem transport, but does not include the local
                 interconnection charge. The tandem switching rate is
                 $0.0012971.

         C.      The Common Transport Facility rate element that applies to
                 tandem routed Local Traffic on a per minute/per mile basis. The
                 Common Transport Facility rate is $0.0000028.

         D.      The Common Transport Terminal element that applies to tandem
                 routed Local Traffic on a per minute/per termination basis. The
                 Common Transport Termination rate is $0.0009636.

                                     D-1
<PAGE>   92

                                   APPENDIX E
            RATES AND CHARGES FOR LOCAL NUMBER PORTABILITY USING RCF


General. The rates contained in this Appendix E are as defined in Article V,
Section 7, and are subject to change resulting from future Commission or other
proceedings, including but not limited to any generic proceeding to determine
GTE's unrecovered costs (e.g., historic costs, contribution, undepreciated
reserve deficiency, or similar unrecovered GTE costs (including GTE's interim
Universal Service Support Surcharge)), the establishment of a competitively
neutral universal service system, or any appeal or other litigation. 

In addition, as defined in Article V, Section 3.2.3, the Party providing the
ported number will pay the other Party the rate per line per month for each
ported business line and the rate per line per month for each ported
residential line for the sharing of Access Charges on calls to ported numbers. 

GTE                                            
         Business Rate Per Line Per Month:               $ 5.98
         Residential Rate Per Line Per Month:            $ 3.66
Contel
         Business Rate Per Line Per Month:               $ 5.67
         Residential Rate Per Line Per Month:            $ 3.78

SERVICE NUMBER PORTABILITY

Remote Call Forwarding                                   $ 4.50 line/month

Simultaneous Call Capability                             $ 2.60 path/month

Non-recurring for Portability                            $10.50



                                     E-1
<PAGE>   93


                                   APPENDIX F
                          SERVICES AVAILABLE FOR RESALE


General. The rates contained in this Appendix F are based upon an avoided cost
discount from GTE's retail rates as provided in Article VI, Section 5.3 of the
Agreement to which this Appendix F is attached and are subject to change
resulting from future Commission or other proceedings, including but not limited
to any generic proceeding to determine GTE's unrecovered costs (e.g., historic
costs, contribution, undepreciated reserve deficiency, or similar unrecovered
GTE costs (including GTE's interim Universal Service Support Surcharge)), the
establishment of a competitively neutral universal service system, or any appeal
or other litigation.

NON-RECURRING CHARGES FOR RESALE SERVICES

     Initial Service Order, per order                        $41.50
     Subsequent Service Order, per order                     $24.00

     Installation, per line                                  $27.00
     Outside Facility Connection Charge, per order*          $Tariffed

*This charge will apply when field work is required for establishment of new
resale service. The terms, conditions and rates that apply for this work are
described in GTE's retail local service tariffs.

                                     F-1
<PAGE>   94
                      GTE TELEPHONE OPERATIONS HEADQUARTERS
                   RESALE PRODUCTS & SERVICES - STATE OF TEXAS
                              CONTEL OF TEXAS, INC.

<TABLE>
<CAPTION>
        LOCAL                                                             BILLING   RESALE   DISCOUNT   RETAIL    AVOIDED   RESALE
ST  CO  TARIFF               SERVICE DESCRIPTION                           TYPE    POSITION  POSITION   RATE       COST      RATE
- --  --  ------               -------------------                          -------  --------  --------   ------    -------   ------
<S> <C>  <C>    <C>                                                        <C>     <C>         <C>      <C>        <C>      <C>    
         A-1    BASIC LOCAL EXCHANGE SERVICES:
                   Flat Rate - 1 Party Service/Business
TX  CON                   Rate Band 1                                      MRC      Yes        Yes      $18.35     $2.50    $15.85
TX  CON                   Rate Band 2                                      MRC      Yes        Yes      $18.90     $2.58    $16.32
                   Flat Rate Bus One Party Key System Station Line
TX  CON                   Rate Band 1                                      MRC      Yes        Yes      $22.00     $3.00    $19.00
TX  CON                   Rate Band 2                                      MRC      Yes        Yes      $22.65     $3.09    $19.56
                   Flat Rate Bus PBX Trunk Two Way
TX  CON                   Rate Band 1                                      MRC      Yes        Yes      $29.40     $4.01    $25.39
TX  CON                   Rate Band 2                                      MRC      Yes        Yes      $30.25     $4.12    $26.13

                   FLAT RATE-1 PARTY SERVICE/RES
TX  CON                   Rate Band 1                                      MRC      No         No        $7.10       N/A       N/A
TX  CON                   Rate Band 2                                      MRC      No         No        $7.30       N/A       N/A
                   Flat Rate RES ONE PRTY KEY SYSTEMS STATION LINE
TX  CON                   Rate Band 1                                      MRC      No         No        $8.50       N/A       N/A
TX  CON                   Rate Band 2                                      MRC      No         No        $8.75       N/A       N/A

                   OPTIONAL EXTENDED AREA SERVICE
                   (Huntington only to Lufkin & Fuller Springs)
TX  CON                Business One-Party                                  MRC      Yes        Yes      $31.00     $4.23    $26.77
TX  CON                Key Line                                            MRC      Yes        Yes      $46.10     $6.28    $39.82
TX  CON                PBX                                                 MRC      Yes        Yes      $59.35     $8.09    $51.26
TX  CON                Residence - One Party                               MRC      No         No       $13.00       N/A       N/A

                   NONOPTIONAL TWO-WAY EXTENDED AREA SERVICE
                   (Riesel to Waco Only)
TX  CON                Business                                            MRC      Yes        Yes      $24.00     $3.27    $20.73
TX  CON                Residence                                           MRC      No         No       $10.00       N/A       N/A
                   OPTIONAL ONE-WAY EXTENDED AREA SERVICE
TX  CON                BUSINESS                                            MRC      Yes        Yes      $10.00     $1.36     $8.64
TX  CON                RESIDENCE                                           MRC      No         No        $5.00       N/A       N/A

                   OPTIONAL TWO-WAY EXTENDED METROPOLITAN SERVICE
TX  CON                Business (Various Exchanges)                        MRC      Yes        Yes      $53.05     $7.23    $45.82
TX  CON                Residence (Various Exchanges                        MRC      No         No       $22.00       N/A       N/A
                   LOCAL CALLING PLANS [See Footnote:  (6)]
</TABLE>

<PAGE>   95
                      GTE TELEPHONE OPERATIONS HEADQUARTERS
                   RESALE PRODUCTS & SERVICES - STATE OF TEXAS
                              CONTEL OF TEXAS, INC.

<TABLE>
<CAPTION>
        LOCAL                                                             BILLING   RESALE   DISCOUNT   RETAIL    AVOIDED   RESALE
ST  CO  TARIFF               SERVICE DESCRIPTION                           TYPE    POSITION  POSITION   RATE       COST      RATE
- --  --  ------               -------------------                          -------  --------  --------   ------    -------   ------
<S> <C>  <C>    <C>                                                        <C>     <C>         <C>      <C>        <C>      <C>    
                   Community Calling Plan
TX  CON                Business                                             MRC     Yes        Yes       $1.00     $0.14     $0.86
TX  CON                Residence                                            MRC     No         No        $1.00       N/A       N/A
                          Rate Band A 0-7 Miles
TX  CON                   1st Minute                                       Usage    Yes        Yes       $0.03     $0.00     $0.03
TX  CON                   Each Additional                                  Usage    Yes        Yes       $0.02     $0.00     $0.01
                       Rate Band B 8-14 Miles
TX  CON                   1st Minute                                       Usage    Yes        Yes       $0.04     $0.01     $0.04
TX  CON                   Each Additional                                  Usage    Yes        Yes       $0.02     $0.00     $0.02
                       Rate Band C 15-21 Miles
TX  CON                   1st Minute                                       Usage    Yes        Yes       $0.06     $0.01     $0.05
TX  CON                   Each Additional                                  Usage    Yes        Yes       $0.03     $0.00     $0.03
                       Rate Band D 22-28 Miles
TX  CON                   1st Minute                                       Usage    Yes        Yes       $0.08     $0.01     $0.07
TX  CON                   Each Additional                                  Usage    Yes        Yes       $0.04     $0.01     $0.04
                       Rate Band E 29+ Miles
TX  CON                   1st Minute                                       Usage    Yes        Yes       $0.09     $0.01     $0.08
TX  CON                   Each Additional                                  Usage    Yes        Yes       $0.05     $0.01     $0.05
                       Discount Rate Period
TX  CON                   5:00 p.m. - 11:00 p.m. (M-F & Sunday)             25%
TX  CON                   11:00 p.m. - 8:00 a.m. (Daily)                    40%
TX  CON                   All Day Saturday                                  40%
TX  CON                   8:00 a.m. - 5:00 p.m. (Sunday)                    40%
TX  CON                   All Day Jan. 1, July 4, Labor, 
                            Thanksgiving & Christmas                        40%
                       MESSAGE RECORDING
                         Detailed Billing Local Calling Plan
TX  CON                   Per Month                                         MRC     Yes        Yes       $0.40     $0.05     $0.35
TX  CON                   Per Page                                         EVENT    Yes        Yes       $0.10     $0.01     $0.09
                       1-Way PCP (Chilton, Crawford, Floresville,& 
                          Sutherland Springs)
                          Business
TX  CON                   One-Party                                         MRC     Yes        Yes      $33.35     $4.55    $28.80
TX  CON                   Key                                               MRC     Yes        Yes      $39.00     $5.32    $33.68
TX  CON                   PBX                                               MRC     Yes        Yes      $54.50     $7.43    $47.07
TX  CON                   Residence                                         MRC     No         No       $15.20       N/A       N/A
                       2-Way PPCP (Floresville & Sutherland
                          Springs)
                          Business
</TABLE>

<PAGE>   96
                      GTE TELEPHONE OPERATIONS HEADQUARTERS
                   RESALE PRODUCTS & SERVICES - STATE OF TEXAS
                              CONTEL OF TEXAS, INC.

<TABLE>
<CAPTION>
        LOCAL                                                             BILLING   RESALE   DISCOUNT   RETAIL    AVOIDED   RESALE
ST  CO  TARIFF               SERVICE DESCRIPTION                           TYPE    POSITION  POSITION   RATE       COST      RATE
- --  --  ------               -------------------                          -------  --------  --------   ------    -------   ------
<S> <C>  <C>    <C>                                                        <C>     <C>         <C>      <C>        <C>      <C>    
TX  CON                        One-Party                                   MRC     Yes          Yes      $66.65     $9.08   $57.57
TX  CON                        Key                                         MRC     Yes          Yes      $78.00    $10.63   $67.37
TX  CON                        PBX                                         MRC     Yes          Yes     $108.95    $14.85   $94.10
TX  CON                        Residence                                   MRC     No           No       $30.40       N/A      N/A
                            1-Way PCP (Bertram, Coupland, & 
                               Quinlan)
                               Business
TX  CON                        One-Party                                   MRC     Yes          Yes      $36.70     $5.00   $31.70
TX  CON                        Key                                         MRC     Yes          Yes      $42.90     $5.85   $37.05
TX  CON                        PBX                                         MRC     Yes          Yes       59.95     $8.17   $51.78
TX  CON                        Residence                                   MRC     No           No       $16.75       N/A      N/A
                         LOCAL & EAS SERVICE - NASSAU BAY
                            USAGE PRICING - BUSINESS
                     OPTION 1 ($2.00)
TX  CON                        One-Party                                   MRC     Yes          Yes        15.5     $2.11   $13.39
TX  CON                        PBX Trunk                                   MRC     Yes          Yes      $15.50     $2.11   $13.39
TX  CON                        Key Line Service                            MRC     Yes          Yes      $15.50     $2.11   $13.39
                     OPTION 3 (UNLIMITED)
TX  CON                        One-Party                                   MRC     Yes          Yes      $36.50     $4.97   $31.53
TX  CON                        PBX Trunk                                   MRC     Yes          Yes        36.5     $4.97   $31.53
TX  CON                        Key Line Service                            MRC     Yes          Yes      $36.50     $4.97   $31.53

                            USAGE PRICING - RESIDENCE
                     OPTION 1 ($2.00)
TX  CON                        One-Party                                   MRC     No           No        $6.90       N/A      N/A
TX  CON                        Key Line                                    MRC     No           No        $6.90       N/A      N/A
                     OPTION 3 (UNLIMITED) 
TX  CON                        One-Party                                   MRC     No           No       $16.00       N/A      N/A
TX  CON                        Key Line                                    MRC     No           No       $16.00       N/A      N/A

                     Usage rates for originated, completed calls 
                            [See Footnote: (6)]
                         Intraexchange
                            Band 1
TX  CON                        First Minute                                Usage   Yes          Yes       $0.02     $0.00    $0.02
TX  CON                        Each Additional Minute                      Usage   Yes          Yes       $0.01     $0.00    $0.01
                         Interexchange
                            Rate Band E1  2-7 Miles
</TABLE>

<PAGE>   97
                      GTE TELEPHONE OPERATIONS HEADQUARTERS
                   RESALE PRODUCTS & SERVICES - STATE OF TEXAS
                              CONTEL OF TEXAS, INC.

<TABLE>
<CAPTION>
        LOCAL                                                             BILLING   RESALE   DISCOUNT   RETAIL    AVOIDED   RESALE
ST  CO  TARIFF               SERVICE DESCRIPTION                           TYPE    POSITION  POSITION   RATE       COST      RATE
- --  --  ------               -------------------                          -------  --------  --------   ------    -------   ------
<S> <C>  <C>    <C>                                                        <C>     <C>         <C>      <C>        <C>      <C>    
TX  CON                   1st Minute                                       Usage   Yes         Yes        $0.04     $0.00     $0.04
TX  CON                   Each Additional                                  Usage   Yes         Yes        $0.02     $0.00     $0.02
                       Rate Band E2  3-14 Miles
TX  CON                   1st Minute                                       Usage   Yes         Yes        $0.05     $0.00     $0.05
TX  CON                   Each Additional                                  Usage   Yes         Yes        $0.03     $0.00     $0.03
                       Rate Band E3  4-21 Miles
TX  CON                   1st Minute                                       Usage   Yes         Yes        $0.06     $0.00     $0.06
TX  CON                   Each Additional                                  Usage   Yes         Yes        $0.03     $0.00     $0.03
                       Rate Band E4  5-28 Miles
TX  CON                   1st Minute                                       Usage   Yes         Yes        $0.08     $0.00     $0.08
TX  CON                   Each Additional                                  Usage   Yes         Yes        $0.04     $0.00     $0.04
                       Rate Band E5  6-28+ Miles
TX  CON                   1st Minute                                       Usage   Yes         Yes        $0.10     $0.00     $0.10
TX  CON                   Each Additional                                  Usage   Yes         Yes        $0.05     $0.00     $0.05
                Rate discount and application period
                   (7:00 a.m. to 11:00 p.m. Full Rate)
TX  CON            (11:00 p.m. to 7:00 a.m. Discounted Rate)                50%
                Busy Line Verify/Intercept Service
TX  CON            Each verification or busy line condition                 NRC    Yes         No         $1.35       N/A     $1.35
TX  CON            Each interruption of a conversation in progress          NRC    Yes         No         $2.20       N/A     $2.20

                DIRECT INWARD DIALING
                       Each DID trunk Access
TX  CON         DID Service                                                 MRC    Yes         Yes       $15.50     $2.11    $13.39
TX  CON         DID Service                                                 NRC    Yes         No       $150.00       N/A   $150.00
TX  CON         First block of 100 numbers                                  MRC    Yes         Yes      $140.00    $19.08   $120.92
TX  CON         Each additional block of 100 directory numbers              MRC    Yes         Yes       $50.00     $6.82    $43.19
                DIRECT INWARD DIALING (Intercept)
TX  CON         1 to 5 lines Up to 6 months                                 NRC    Yes         No       $250.00       N/A   $250.00
TX  CON         2 to 5 lines over 6 months to 12 months                     NRC    Yes         No       $450.00       N/A   $450.00
                ROTARY HUNTING
TX  CON            Individual (D1)                                          MRC    Yes         Yes        $3.00     $0.41     $2.59
TX  CON            PBX, Key line, and multiline service                     MRC    Yes         Yes        $1.50     $0.20     $1.30
                DIRECTORY ASSISTANCE SERVICE
 C  CON            First three local calls from DA                         USAGE   Yes         No         $0.00               $0.00
TX  CON            Each additional number requested                        USAGE   Yes         No         $0.25       N/A     $0.25
</TABLE>


<PAGE>   98
                      GTE TELEPHONE OPERATIONS HEADQUARTERS
                   RESALE PRODUCTS & SERVICES - STATE OF TEXAS
                              CONTEL OF TEXAS, INC.

<TABLE>
<CAPTION>
        LOCAL                                                             BILLING   RESALE   DISCOUNT   RETAIL    AVOIDED   RESALE
ST  CO  TARIFF               SERVICE DESCRIPTION                           TYPE    POSITION  POSITION   RATE       COST      RATE
- --  --  ------               -------------------                          -------  --------  --------   ------    -------   ------
<S> <C>  <C>    <C>                                                        <C>     <C>         <C>      <C>        <C>      <C>    
TX  CON                Each public or semipublic telephone message         USAGE    Yes        No         $0.25       N/A     $0.25
TX  CON                Each local public access line message               USAGE    Yes        No         $0.03       N/A     $0.03
TX  CON                Colmesneil and Gary exchanges pub/semipublic        USAGE    Yes        No         $0.10       N/A     $0.10
                       Each operator assisted call billed to 
                       collect, third number, calling card from a 
                       coin, or coinless pay telephone - Not
                       applicable to customers requiring 
                       Telecommunications
TX  CON                Relay Service.                                      MRC      Yes        Yes        $1.35     $0.00     $1.35

         A-1       CUSTOMER OWNED PAY TELEPHONE SERVICE
TX  CON                Public Access Line (PAL)                            MRC      Yes        No        $14.70       N/A    $14.70
                       Answer Supervision                                  MRC      Yes        No                             $0.00
                       Coin Line Service                                   MRC      Yes        No                             $0.00

                   CUSTOM CALLING VERTICAL SERVICES
TX  CON            Call Waiting - Business                                 MRC      Yes        Yes        $3.50     $0.48     $3.02
TX  CON            Call Waiting - Residence                                MRC      Yes        Yes        $2.50     $0.34     $2.16
TX  CON            Call Forwarding - Business                              MRC      Yes        Yes        $3.50     $0.48     $3.02
TX  CON            Call Forwarding - Residence                             MRC      Yes        Yes        $2.50     $0.34     $2.16
TX  CON            Call Forwarding Multipath - Business                    MRC      Yes        Yes        $3.50     $0.48     $3.02
TX  CON            Call Forwarding Multipath - Residence                   MRC      Yes        Yes        $2.50     $0.34     $2.16
TX  CON            Speed Call 8 - Business                                 MRC      Yes        Yes        $3.50     $0.48     $3.02
TX  CON            Speed Call 8 - Residence                                MRC      Yes        Yes        $2.50     $0.34     $2.16
TX  CON            Simplified Message Desk - Business                      MRC      Yes        Yes       $1.000   $0.1363     $0.86
TX  CON            Simplified Message Desk - Residence                     MRC      Yes        Yes       $1.000   $0.1363     $0.86
TX  CON            Three Way Calling - One Feature - Business              MRC      Yes        Yes        $3.50     $0.48     $3.02
TX  CON            Three Way Calling - One Feature - Residence             MRC      Yes        Yes        $2.50     $0.34     $2.16
TX  CON            Call Forward - Don't Answer - Business                  MRC      Yes        Yes        $1.00     $0.14     $0.86
TX  CON            Call Forward - Don't Answer - Residence                 MRC      Yes        Yes        $1.00     $0.14     $0.86
TX  CON            Cancel Call Waiting - Business                          MRC      Yes        Yes        $1.80     $0.25     $1.55
TX  CON            Cancel Call Waiting - Residence                         MRC      Yes        Yes        $0.90     $0.12     $0.78
                   TWO FEATURE PACKAGES
                       Call Forwarding & Call Waiting
TX  CON                   Business                                         MRC      Yes        Yes      $5.0000   $0.6815     $4.32
TX  CON                   Residence                                        MRC      Yes        Yes      $4.0000   $0.5452     $3.45
                       Call Forwarding & Three-Way Calling
TX  CON                   Business                                         MRC      Yes        Yes      $5.0000   $0.6815     $4.32
TX  CON                   Residence                                        MRC      Yes        Yes      $4.0000   $0.5452     $3.45
                       Call Waiting and Three-Way Calling
TX  CON                   Business                                         MRC      Yes        Yes      $5.0000   $0.6815     $4.32
</TABLE>

<PAGE>   99
                      GTE TELEPHONE OPERATIONS HEADQUARTERS
                   RESALE PRODUCTS & SERVICES - STATE OF TEXAS
                              CONTEL OF TEXAS, INC.
<TABLE>
<CAPTION>
        LOCAL                                                             BILLING   RESALE   DISCOUNT   RETAIL    AVOIDED   RESALE
ST  CO  TARIFF               SERVICE DESCRIPTION                           TYPE    POSITION  POSITION   RATE       COST      RATE
- --  --  ------               -------------------                          -------  --------  --------   ------    -------   ------
<S> <C>  <C>    <C>                                                        <C>     <C>         <C>      <C>       <C>       <C>    
TX  CON                   Residence                                         MRC     Yes        Yes      $4.0000   $0.5452     $3.45
                       Call Forwarding & Speed Calling 8
TX  CON                   Business                                          MRC     Yes        Yes      $5.0000   $0.6815     $4.32
TX  CON                   Residence                                         MRC     Yes        Yes      $4.0000   $0.5452     $3.45
                       Call Waiting & Speed Calling 8
TX  CON                   Business                                          MRC     Yes        Yes      $5.0000   $0.6815     $4.32
TX  CON                   Residence                                         MRC     Yes        Yes      $4.0000   $0.5452     $3.45
                       Three-Way Calling and Speed Calling 8
TX  CON                   Business                                          MRC     Yes        Yes      $5.0000   $0.6815     $4.32
TX  CON                   Residence                                         MRC     Yes        Yes      $4.0000   $0.5452     $3.45
                   THREE FEATURE PACKAGES
                       Call Forwarding, Call Waiting, 
                          & Three-Way Calling
TX  CON                   Business                                          MRC     Yes        Yes     $6.50000   $0.8860     $5.61
TX  CON                   Residence                                         MRC     Yes        Yes        $5.50     $0.75     $4.75
                       Call Forwarding, Call Waiting, 
                          & Customer Speed Calling
TX  CON                   Business                                          MRC     Yes        Yes        $6.50     $0.89     $5.61
TX  CON                   Residence                                         MRC     Yes        Yes        $5.50     $0.75     $4.75
                       Call Waiting, Three-Way Calling 
                          & Customer Speed Calling 8
TX  CON                   Business                                          MRC     Yes        Yes        $6.50     $0.89     $5.61
TX  CON                   Residence                                         MRC     Yes        Yes        $5.50     $0.75     $4.75
                       Three-Way Calling, Call Forwarding 
                          & Customer Speed Calling 8
TX  CON                   Business                                          MRC     Yes        Yes        $6.50     $0.89     $5.61
TX  CON                   Residence                                         MRC     Yes        Yes        $5.50     $0.75     $4.75
                   FOUR FEATURE PACKAGES
                       Call Forwarding, Call Waiting, Three-Way Calling 
                          & Customer Speed Calling 8
TX  CON                   Business                                          MRC     Yes        Yes        $8.00     $1.09     $6.91
TX  CON                   Residence                                         MRC     Yes        Yes        $7.00     $0.95     $6.05

TX  CON            Smart Ring - One Feature - Business                      MRC     Yes        Yes        $6.00     $0.82     $5.18
TX  CON            Smart Ring - One Feature - Residence                     MRC     Yes        Yes        $6.00     $0.82     $5.18
TX  CON            Smart Ring - With Package - Business                     MRC     Yes        Yes        $3.00     $0.41     $2.59
TX  CON            Smart Ring - With Package - Residence                    MRC     Yes        Yes        $3.00     $0.41     $2.59
</TABLE>

<PAGE>   100
                      GTE TELEPHONE OPERATIONS HEADQUARTERS
                   RESALE PRODUCTS & SERVICES - STATE OF TEXAS
                              CONTEL OF TEXAS, INC.
<TABLE>
<CAPTION>
        LOCAL                                                             BILLING   RESALE   DISCOUNT   RETAIL    AVOIDED   RESALE
ST  CO  TARIFF               SERVICE DESCRIPTION                           TYPE    POSITION  POSITION   RATE       COST      RATE
- --  --  ------               -------------------                          -------  --------  --------   ------    -------   ------
<S> <C>  <C>    <C>                                                        <C>     <C>         <C>      <C>        <C>      <C>    
                CLASS Vertical Services:
TX  CON            Automatic Busy Redial - Business                         MRC     Yes        Yes        $4.00     $0.55     $3.45
TX  CON            Automatic Busy Redial - Residence                        MRC     Yes        Yes        $2.00     $0.27     $1.73
TX  CON            Automatic Busy Redial - Per Event                        NRC     Yes        Yes        $0.75     $0.00     $0.75
TX  CON            Automatic Call Return - Business                         MRC     Yes        Yes        $4.00     $0.55     $3.45
TX  CON            Automatic Call Return - Residence                        MRC     Yes        Yes        $3.00     $0.41     $2.59
TX  CON            Automatic Call Return - Per Event                        NRC     Yes        Yes        $0.75     $0.00     $0.75
TX  CON            Call Block - Business                                    MRC     Yes        Yes        $3.00     $0.41     $2.59
TX  CON            Call Block - Residence                                   MRC     Yes        Yes        $2.00     $0.27     $1.73
TX  CON            Special Call Acceptance - Business                       MRC     Yes        Yes        $3.00     $0.41     $2.59
TX  CON            Special Call Acceptance - Residence                      MRC     Yes        Yes        $2.00     $0.27     $1.73
TX  CON            Special Call Forwarding - Business                       MRC     Yes        Yes        $2.65     $0.36     $2.29
TX  CON            Special Call Forwarding - Residence                      MRC     Yes        Yes        $2.00     $0.27     $1.73
TX  CON            Special Call Waiting - Business                          MRC     Yes        Yes        $3.00     $0.41     $2.59
TX  CON            Special Call Waiting - Residence                         MRC     Yes        Yes        $2.00     $0.27     $1.73
TX  CON            VIP Alert - Business                                     MRC     Yes        Yes        $3.00     $0.41     $2.59
TX  CON            VIP Alert - Residence                                    MRC     Yes        Yes        $2.50     $0.34     $2.16
TX  CON            Call Tracing Service - Business                          NRC     Yes        No        $10.00       N/A    $10.00
TX  CON            Call Tracing Service - Residence                         NRC     Yes        No        $10.00       N/A    $10.00
TX  CON            Calling Number ID - Business                             MRC     Yes        Yes        $7.50     $1.02     $6.48
TX  CON            Calling Number ID - Residence                            MRC     Yes        Yes        $4.95     $0.67     $4.28
TX  CON            Calling Number ID w/ACRJ - Business                      MRC     Yes        Yes        $7.75     $1.06     $6.69
TX  CON            Calling Number ID w/ACRJ - Residence                     MRC     Yes        Yes        $5.20     $0.71     $4.49
TX  CON            Calling Name and Number Delivery - Business              MRC     Yes        Yes        $9.00     $1.23     $7.77
TX  CON            Calling Name and Number Delivery - Residence             MRC     Yes        Yes        $6.50     $0.89     $5.61
TX  CON            Anonymous Call Rejection (ACRJ) - Business               MRC     Yes        Yes        $1.00     $0.14     $0.86
TX  CON            Anonymous Call Rejection (ACRJ) - Residence              MRC     Yes        Yes        $1.00     $0.14     $0.86
TX  CON            SmartCall PAK 4400 - Residence                           MRC     Yes        Yes        $8.75     $1.19     $7.56
TX  CON            SmartCall PAK 4900 - Residence                           MRC     Yes        Yes       $13.25     $1.81    $11.44

         A-1       CENTRAL OFFICE SERVICES
                       Wake-up Service
TX  CON                   Business                                          MRC     Yes        Yes        $3.50     $0.48     $3.02
TX  CON                   Residence                                         MRC     Yes        Yes        $2.50     $0.34     $2.16
                       Single line intercom
TX  CON                   Business                                          MRC     Yes        Yes        $3.50     $0.48     $3.02
</TABLE>
<PAGE>   101
                      GTE TELEPHONE OPERATIONS HEADQUARTERS
                   RESALE PRODUCTS & SERVICES - STATE OF TEXAS
                              CONTEL OF TEXAS, INC.
<TABLE>
<CAPTION>
        LOCAL                                                             BILLING   RESALE   DISCOUNT   RETAIL    AVOIDED   RESALE
ST  CO  TARIFF               SERVICE DESCRIPTION                           TYPE    POSITION  POSITION   RATE       COST      RATE
- --  --  ------               -------------------                         -------- ---------  ---------  -------    -------  -------
<S> <C>  <C>    <C>                                                        <C>     <C>         <C>      <C>        <C>      <C>    
TX  CON                   Residence                                         MRC     Yes        Yes        $2.50     $0.34     $2.16

                   REMOTE CALL FORWARDING
TX  CON                Residence (First network access)                     MRC     Yes        Yes       $20.00     $2.73    $17.27
TX  CON                Residence (Additional network access)                MRC     Yes        Yes       $20.00     $2.73    $17.27

                   SEASONAL AND VACATION SERVICE
                       50% of regular rates for basic and 
                          associated additional svs. for:
TX  CON                Colmesneil & Gary Exchanges.  
                          [See Footnote:  (6)]                              MRC     Yes        No        Varies    Varies    Varies

                   RESIDENCE TEL-ASSISTANCE PROGRAM
                       Measured Service Exchanges (A credit of 
TX  CON                65% of the Meas. Access Line and usage apply.)       MRC     Yes        No        Varies    Varies    Varies
                       Nonmeasured Service Exchanges (A credit of 65% 
TX  CON                of the local network access line rates apply.)       MRC     Yes        No        Varies    Varies    Varies

                   LIFELINE TELEPHONE SERVICE (A credit equal to the 
                       FCC-mandated subscriber line charge not to                     
TX  CON                exceed $3.50 per month.)                             MRC     Yes        No        ($3.50)      N/A    ($3.50)
                   CALL RESTRICTION SERVICES
                    Toll Blocking
                       Option 1
TX  CON                   Blocks All 1+ calls, per line/trunk               MRC     Yes        Yes          1.5     $0.20     $1.30
TX  CON                   Blocks All 1+ calls, per line/trunk               NRC     Yes        No        $10.00       N/A    $10.00
                       Option 2
TX  CON                   Blocks All 1+, 0+ and 0- calls per line/trunk     MRC     Yes        Yes        $1.50     $0.20     $1.30
TX  CON                   Blocks All 1+, 0+ and 0- calls per line/trunk     NRC     Yes        No        $10.00       N/A    $10.00
                   BILLED NUMBER SCREENING SERVICE (BNS)
                       Option 1
TX  CON                   Collect and Third Number Billing                  MRC     Yes        Yes        $2.00     $0.27     $1.73
TX  CON                   Collect and Third Number Billing                  NRC     Yes        No        $10.00       N/A    $10.00
                       Option 2
TX  CON                   Third Number Billing                              MRC     Yes        Yes        $2.00     $0.27     $1.73
TX  CON                   Third Number Billing                              NRC     Yes        No        $10.00       N/A    $10.00
                       Option 3
TX  CON                   Collect Billing                                   MRC     Yes        Yes        $2.00     $0.27     $1.73
</TABLE>

<PAGE>   102
                      GTE TELEPHONE OPERATIONS HEADQUARTERS
                   RESALE PRODUCTS & SERVICES - STATE OF TEXAS
                              CONTEL OF TEXAS, INC.
<TABLE>
<CAPTION>
        LOCAL                                                             BILLING   RESALE   DISCOUNT   RETAIL    AVOIDED   RESALE
ST  CO  TARIFF               SERVICE DESCRIPTION                           TYPE    POSITION  POSITION   RATE       COST      RATE
- --  --  ------               -------------------                          -------- --------- --------  --------   --------  --------
<S> <C>  <C>    <C>                                                        <C>     <C>         <C>      <C>        <C>      <C>    
TX  CON                   Collect Billing                                   NRC     Yes        No        $10.00       N/A    $10.00
                   SELECTIVE CLASS OF CALL SCREENING
                       Per Line
TX  CON                   Selective Class of Call Screening                 MRC     Yes        Yes        $3.00     $0.41     $2.59
TX  CON                   Selective Class of Call Screening                 NRC     Yes        No        $10.00       N/A    $10.00
                       Per Trunk
TX  CON                   Selective Class of Call Screening                 NRC     Yes        Yes       $10.00     $1.36     $8.64
TX  CON                   Selective Class of Call Screening                 NRC     Yes        No        $10.00       N/A    $10.00

                   EXPANDED LOCAL CALLING SERVICE 
                       [See Footnote:  (6)]
TX  CON  A-1A          HIGH (Bus. $7.00; Res. $3.50)                        MRC     Yes        Yes        $7.00     $0.95     $6.05
TX  CON                LOW (Bus. $1.01; Res. $.51                           MRC     Yes        Yes        $1.01     $0.14     $0.87
          A-2               OUTSIDE PLANT EQUIPMENT - SPECIAL SERVICE
                       Terminals are in different building 
                          on same property

                   Different Premises
TX  CON                   Each one-quarter mile or fraction thereof         MRC     Yes        Yes        $2.00     $0.27     $1.73

                       Terminals are in different buildings 
                          on noncontinuous
TX  CON                   Each one-quarter mile or fraction thereof         MRC     Yes        Yes        $2.00     $0.27     $1.73

                       Within Avery, Hooks, Karnack, and 
                         Uncertain exchanges
                         Detached extension lines
TX  CON                   Extension line mileage first 1/4 mile             MRC     Yes        Yes        $3.00     $0.41     $2.59
TX  CON                   Additional 1/4 mile, each                         MRC     Yes        Yes        $1.00     $0.14     $0.86

                       Within the Colmesneil and Gary exchanges
                          Detached extension lines
TX  CON                      On premises, each one-tenth mile 
                               of extension line                            MRC     Yes        Yes        $0.75     $0.10     $0.65
TX  CON                      Off premises, first 1/4 mile 
                               of extension line                            MRC     Yes        Yes        $3.00     $0.41     $2.59
TX  CON                      Each additional 1/4 mile or    
                               fraction thereof                             MRC     Yes        Yes        $1.50     $0.20     $1.30

                   Each tie line between private branch exchange systems
                       Same customer
                          Different premises
TX  CON                      First 1/4 mile or fraction thereof             MRC     Yes        Yes        $2.00     $0.27     $1.73
</TABLE>
<PAGE>   103
                      GTE TELEPHONE OPERATIONS HEADQUARTERS
                   RESALE PRODUCTS & SERVICES - STATE OF TEXAS
                              CONTEL OF TEXAS, INC.
<TABLE>
<CAPTION>
        LOCAL                                                             BILLING   RESALE   DISCOUNT   RETAIL    AVOIDED   RESALE
ST  CO  TARIFF               SERVICE DESCRIPTION                           TYPE    POSITION  POSITION   RATE       COST      RATE
- --  --  ------               -------------------                          -------  --------  --------   ------    -------   ------
<S> <C>  <C>    <C>                                                        <C>     <C>         <C>      <C>        <C>      <C>    
TX  CON                      Each additional 1/4 mile 
                               or fraction thereof                          MRC     Yes        Yes        $2.00     $0.27     $1.73
                       Different Customer 
TX  CON                      First 1/4 mile or fraction thereof             MRC     Yes        Yes        $2.00     $0.27     $1.73
TX  CON                      Each additional 1/4 mile 
                               or fraction thereof                          MRC     Yes        Yes        $2.00     $0.27     $1.73

         A-5       SERVICE CHARGES
TX  CON            SERVICE ORDER CHARGE INITIAL - RESIDENCE                 NRC     No         No        $20.00       N/A       N/A
TX  CON            SERVICE ORDER CHARGE INITIAL -BUSINESS                   NRC     No         No        $30.00       N/A       N/A
TX  CON            SERVICE ORDER CHARGE SUBSEQUENT - RESIDENCE              NRC     No         No         $8.00       N/A       N/A
TX  CON            SERVICE ORDER CHARGE SUBSEQUENT -BUSINESS                NRC     No         No        $13.50       N/A       N/A
TX  CON            LOCAL PUBLIC ACCESS LINE                                 NRC     No         No        $20.00       N/A       N/A
TX  CON            LINE CONNECTION CHARGE BUS                               NRC     No         No        $20.00       N/A       N/A
TX  CON            LINE CONNECTION CHARGE RES                               NRC     No         No        $20.00       N/A       N/A
TX  CON            TRIP CHARGE - RESIDENCE                                  NRC     No         No        $20.00       N/A       N/A
TX  CON            TRIP CHARGE - BUSINESS                                   NRC     No         No        $20.00       N/A       N/A
                   SPECIAL SERVICES
TX  CON                   RESIDENCE                                         NRC     No         No         $6.85       N/A       N/A
TX  CON                   BUSINESS                                          NRC     No         No         $6.85       N/A       N/A
                   DIRECTORY LISTING CHANGES OR ADDITIONS
TX  CON                   RESIDENCE                                         NRC     No         Yes        $3.50     $0.00       N/A
TX  CON                   BUSINESS                                          NRC     No         Yes        $3.50     $0.00       N/A

         A-6       DIRECTORY LISTINGS
                       Primary Service Listings
TX  CON                   Each network access line service                  MRC     Yes        Yes        $0.00     $0.00     $0.00
                          Additional Listings
TX  CON                   Each business listing                             MRC     No         No         $1.05     $0.14       N/A
TX  CON                   Each residence listing                            MRC     No         No         $0.70     $0.10       N/A
TX  CON                   Each residence dual listing                       MRC     No         No         $0.70     $0.10       N/A
TX  CON                   Each listing of guests at a hotel or motel        MRC     No         No         $1.05     $0.14       N/A
TX  CON                   Each reference to another service 
                             same customer                                  MRC     No         No         $1.05     $0.14       N/A
TX  CON                   Each reference to another service 
                             another customer                               MRC     No         No         $1.05     $0.14       N/A
TX  CON                   Each cross reference listing                      MRC     No         No         $1.05     $0.14       N/A
TX  CON                   Each line of information in addition 
                             to a listing                                   MRC     No         No         $1.05     $0.14       N/A
TX  CON                   Each listing in the local directory of 
                             a foreign primary Service                      MRC     No         No         $1.40     $0.19       N/A
                          Each NonPublished                                 MRC     No         No         $1.40     $0.19       N/A
</TABLE>

<PAGE>   104
                      GTE TELEPHONE OPERATIONS HEADQUARTERS
                   RESALE PRODUCTS & SERVICES - STATE OF TEXAS
                              CONTEL OF TEXAS, INC.
<TABLE>
<CAPTION>
        LOCAL                                                             BILLING   RESALE   DISCOUNT   RETAIL    AVOIDED   RESALE
ST  CO  TARIFF               SERVICE DESCRIPTION                           TYPE    POSITION  POSITION   RATE       COST      RATE
- --  --  ------               -------------------                          -------  --------  --------   ------    -------   ------
<S> <C>  <C>    <C>                                                        <C>     <C>         <C>      <C>        <C>      <C>    
                   Primary Service Listings - Avery, Hooks, 
                          Karnack, Uncertain Exchanges
TX  CON                      Business                                       MRC     Yes        Yes        $0.00     $0.00     $0.00
TX  CON                      Residence                                      MRC     Yes        Yes        $0.00     $0.00     $0.00
TX  CON                   Additional Listings
TX  CON                   Each business listing                             MRC     No         No         $1.25     $0.17       N/A
TX  CON                   Each residence listing                            MRC     No         No         $1.25     $0.17       N/A
TX  CON                   Each alternate call number listing                MRC     No         No         $1.25     $0.17       N/A
                       Each listing in the local directory 
                             of a foreign primary svc
TX  CON                      Business                                       MRC     No         No         $3.50     $0.48       N/A
TX  CON                      Residence                                      MRC     No         No         $3.50     $0.48       N/A
                       Nonpublished Telephone Number
TX  CON                   Each nonpublished telephone number                MRC     No         No         $2.50     $0.34       N/A
                       Unlisted telephone number
TX  CON                   Each unlisted number                              MRC     No         No         $2.50     $0.34       N/A
                   PERSONALIZED TELEPHONE NUMBER SERVICE
TX  CON                      Business                                       NRC     Yes        No        $38.00       N/A    $38.00
TX  CON                      Business                                       MRC     Yes        Yes        $3.50     $0.48     $3.02
TX  CON                      Residence                                      NRC     Yes        No        $10.00       N/A    $10.00
TX  CON                      Residence                                      MRC     Yes        Yes        $1.50     $0.20     $1.30
                   Within the Colmesneil and Gary Exchanges
                       Primary Service Listing
                       Additional Listings
TX  CON                      Business                                       MRC     No         No         $0.50     $0.07       N/A
TX  CON                      Residence                                      MRC     No         No         $0.25     $0.03       N/A

         A-9       FIRE REPORTING SERVICE
                       Tellabs 292 common equipment includes 10 lines
                          equipped with the following:  0 lines, 1 
                          common control shelf, 1 line card shelf, 
                          1 ringing interrupter module, 2 fuse modules 
                          (1/shelf), 1 tone supply module
TX  CON                   1 ringing timer module, 1 automatic access port   MRC     Yes        Yes       $79.55    $10.84    $68.71

TX  CON                   Additional line card shelf                        MRC     Yes        Yes       $43.50     $5.93    $37.57

                          Auxilary common equipment
TX  CON                      Each station line card on shelf                MRC     Yes        Yes        $5.70     $0.78     $4.92
</TABLE>

<PAGE>   105
                      GTE TELEPHONE OPERATIONS HEADQUARTERS
                   RESALE PRODUCTS & SERVICES - STATE OF TEXAS
                              CONTEL OF TEXAS, INC.
<TABLE>
<CAPTION>
        LOCAL                                                             BILLING   RESALE   DISCOUNT   RETAIL    AVOIDED   RESALE
ST  CO  TARIFF               SERVICE DESCRIPTION                           TYPE    POSITION  POSITION   RATE       COST      RATE
- --  --  ------               -------------------                          -------  --------  --------   ------    -------   ------
<S> <C>  <C>    <C>                                                        <C>     <C>         <C>      <C>        <C>      <C>    
                    Optional Equipment
                       Siren control timer module max. 1 per  
TX  CON                system/either external or touchtone                  MRC     Yes        Yes        $5.50     $0.75     $4.75


         A-10   MISCELLANEOUS BILLING SERVICE
                    Additional Bill Copy Service
                       One to three copies per account, only
TX  CON                   Each request charge per account                   MRC     No         No         $2.50       N/A       N/A
                    Number Reservation Service
TX  CON                   Each telephone number reserved, per month         MRC     Yes        Yes        $3.50     $0.48     $3.02
                PHONE NUMBER REFERRAL SERVICE (PNRS)
TX  CON                   Business                                          NRC     Yes        No        $16.00       N/A    $16.00
TX  CON                   Residence                                         NRC     Yes        No         $9.00       N/A     $9.00
                CALL SCREENING
                    Restricts incoming toll calls to prohibits collect &
TX  CON             third number billed calls                               MRC     Yes        Yes        $1.50     $0.20     $1.30

         A-11   DIGITAL CENTREX SERVICE
                    Intragroup calling Service Monthly rate per line 
                       (3 year term)
TX  CON                Centrex Local Line - 
                         First 100 Lines (2-100) 0.5 miles                  MRC     Yes        Yes       $10.16     $1.38     $8.78
TX  CON                Centrex Local Line - 
                         First 100 Lines (2-100) 1.0 miles                  MRC     Yes        Yes       $12.36     $1.68    $10.68
TX  CON                Centrex Local Line - 
                         First 100 Lines (2-100) 1.5 miles                  MRC     Yes        Yes       $14.44     $1.97    $12.47
TX  CON                Centrex Local Line - 
                         First 100 Lines (2-100) 2.0 miles                  MRC     Yes        Yes       $16.62     $2.27    $14.35
TX  CON                Centrex Local Line - 
                         First 100 Lines (2-100) 2.5 miles                  MRC     Yes        Yes       $18.71     $2.55    $16.16

                    Intragroup calling Service Monthly rate per line 
                       (5 year term)
                       (A Termination Agreement is Required)
TX  CON                Centrex Local Line - 
                         First 100 Lines (2-100) 0.5 miles                  MRC     Yes        Yes        $9.56     $1.30     $8.26
TX  CON                Centrex Local Line - 
                         First 100 Lines (2-100) 1.0 miles                  MRC     Yes        Yes       $11.25     $1.53     $9.72
TX  CON                Centrex Local Line - 
                         First 100 Lines (2-100) 1.5 miles                  MRC     Yes        Yes       $12.85     $1.75    $11.10
TX  CON                Centrex Local Line - 
                         First 100 Lines (2-100) 2.0 miles                  MRC     Yes        Yes       $14.54     $1.98    $12.56
TX  CON                Centrex Local Line - 
                         First 100 Lines (2-100) 2.5 miles                  MRC     Yes        Yes       $16.15     $2.20    $13.95
TX  CON                Centrex Local Line - 
                         First 100 Lines (2-100) 3.0 miles                  MRC     Yes        Yes       $17.84     $2.43    $15.41

                    Intragroup calling Service Monthly rates per line 
                       (7 year term)
</TABLE>

<PAGE>   106
                      GTE TELEPHONE OPERATIONS HEADQUARTERS
                   RESALE PRODUCTS & SERVICES - STATE OF TEXAS
                           CONTEL OF TEXAS, INC.
<TABLE>
<CAPTION>
        LOCAL                                                             BILLING   RESALE   DISCOUNT   RETAIL    AVOIDED   RESALE
ST  CO  TARIFF               SERVICE DESCRIPTION                           TYPE    POSITION  POSITION   RATE       COST      RATE
- --  --  ------               -------------------                          -------  --------  --------   ------    -------   ------
<S> <C>  <C>    <C>                                                        <C>     <C>         <C>      <C>        <C>      <C>    
                   (A Termination Agreement is Required)
TX  CON            Centrex Local Line - First 100 Lines (2-100) 0.5 miles   MRC     Yes        Yes        $9.30     $1.27     $8.03
TX  CON            Centrex Local Line - First 100 Lines (2-100) 1.0 miles   MRC     Yes        Yes       $10.79     $1.47     $9.32
TX  CON            Centrex Local Line - First 100 Lines (2-100) 1.5 miles   MRC     Yes        Yes       $12.21     $1.66    $10.55
TX  CON            Centrex Local Line - First 100 Lines (2-100) 2.0 miles   MRC     Yes        Yes       $13.70     $1.87    $11.83
TX  CON            Centrex Local Line - First 100 Lines (2-100) 2.5 miles   MRC     Yes        Yes       $15.11     $2.06    $13.05
TX  CON            Centrex Local Line - First 100 Lines (2-100) 3.0 miles   MRC     Yes        Yes       $16.60     $2.26    $14.34

                Intragroup calling Service Monthly rates per line 
                   (9 year term)
TX  CON            (A Termination Agreement is Required)
TX  CON            Centrex Local Line - First 100 Lines (2-100) 0.5 miles   MRC     Yes        Yes        $9.18     $1.25     $7.93
TX  CON            Centrex Local Line - First 100 Lines (2-100) 1.0 miles   MRC     Yes        Yes       $10.56     $1.44     $9.12
TX  CON            Centrex Local Line - First 100 Lines (2-100) 1.5 miles   MRC     Yes        Yes       $11.88     $1.62    $10.26
TX  CON            Centrex Local Line - First 100 Lines (2-100) 2.0 miles   MRC     Yes        Yes       $13.26     $1.81    $11.45
TX  CON            Centrex Local Line - First 100 Lines (2-100) 2.5 miles   MRC     Yes        Yes       $14.57     $1.99    $12.58
TX  CON            Centrex Local Line - First 100 Lines (2-100) 3.0 miles   MRC     Yes        Yes       $15.96     $2.18    $13.78

                Features and Services
TX  CON            Each Basic Package                                       MRC     Yes        Yes        $3.00     $0.41     $2.59
TX  CON            Additional Features or services, each                    MRC     Yes        Yes        $0.25     $0.03     $0.22
TX  CON            Foreign Exchange (FX) Line Access-Analog                 MRC     Yes        Yes        $0.50     $0.07     $0.43
TX  CON            Foreign Exchange (FX) Line Access-Digital 2-way          MRC     Yes        Yes        $0.50     $0.07     $0.43
                   Enhanced Features & Services
TX  CON            Enhanced Business Service                                MRC     Yes        Yes        $2.35     $0.32     $2.03
TX  CON            Additional Features or services, each (see cond. a15)    MRC     Yes        Yes        $0.25     $0.03     $0.22
TX  CON            Virtual Facility Group                                   MRC     Yes        Yes        $1.25     $0.17     $1.08
                BASIC FEATURES
                   Basic features and service package includes touchtone
                    and may include up to six features with additional
TX  CON             features at $.25 each.                                  MRC     Yes        Yes        $0.25     $0.03     $0.22
                ENHANCED FEATURES
                   Basic features and service package will include any 
                    six and any basic features with additional features 
TX  CON             or services at $.25 each.                               MRC     Yes        Yes        $0.25     $0.03     $0.22

TX  CON  A-12   9-1-1 NETWORK SERVICE
</TABLE>

<PAGE>   107
                      GTE TELEPHONE OPERATIONS HEADQUARTERS
                   RESALE PRODUCTS & SERVICES - STATE OF TEXAS
                              CONTEL OF TEXAS, INC.

<TABLE>
<CAPTION>
        LOCAL                                                             BILLING   RESALE   DISCOUNT   RETAIL    AVOIDED   RESALE
ST  CO  TARIFF               SERVICE DESCRIPTION                           TYPE    POSITION  POSITION   RATE       COST      RATE
- --  --  ------               -------------------                          -------  --------  --------   ------    -------   ------
<S> <C>  <C>    <C>                                                        <C>     <C>         <C>      <C>        <C>      <C>    
                  E9-1-1 Service Line                                       MRC     Yes        Yes       $17.14     $2.34    $14.80
                  E9-1-1 Service Line - NRC                                 NRC     Yes        No       $192.81       N/A   $192.81
         A-13    Private Switch Emergency Service
                 PS 911 Service Trunk - See Automatic 
                    Trunk Rate Schedule A-1
                 911 Service Trunk - See Schedule A-12 
                    for Special E911 Trunk Rate
                 Directory Number - See DID Rates in Schedule A-1
                 PS ALI Subscriber Record - See Schedule A-12 
                    ALI Database and Selective Routing
                 PS ALI Entry Admin Site Packages
                     Option 1                                               NRC     Yes        No       $449.44       N/A   $449.44
                     Option 1                                               MRC     Yes        Yes      $158.76    $21.64   $137.12
                     Option 2                                               NRC     Yes        No       $282.49       N/A   $282.49
                     Option 2                                               MRC     Yes        Yes       $18.35     $2.50    $15.85
                     Option 3                                               NRC     Yes        No       $206.20       N/A   $206.20
                     Option 3                                               MRC     Yes        Yes       $36.93     $5.03    $31.90
                     Option 4                                               NRC     Yes        No       $189.00       N/A   $189.00
                     Option 4                                               MRC     Yes        Yes        $9.00     $1.23     $7.77

          G-1    PRIVATE LINE SERVICE AND CHANNELS
                     Intraexchange Service
                        Metallic Service
                           Circuit Termination
                              First 1/4 mile or fraction 
                              thereof, air line measurement
TX  CON                       per point of termination                      MRC     Yes        No         $5.60     $0.76     $4.84
TX  CON                    Circuit Termination                              NRC     Yes        No       $293.47       N/A   $293.47
                              Each additional 1/4 mile 
                              or fraction thereof, air line
TX  CON                       measurement, per point of termination         MRC     Yes        No         $1.40     $0.19     $1.21
                           Optional Features and Functions 
                              Bridging - per port
TX  CON                       Three premises                                MRC     Yes        No         $4.64     $0.63     $4.01
TX  CON                       Series                                        MRC     Yes        No         $4.64     $0.63     $4.01
                           Voice Grade Service
                              Circuit Termination - 2 wire
                                  First 1/4 mile or fraction 
                                  thereof, air line measurement
TX  CON                           per point of termination                  MRC     Yes        No         $5.60     $0.76     $4.84
TX  CON                       Circuit Termination - 2 wire                  NRC     Yes        No       $334.33       N/A   $334.33
                                  Each additional 1/4 mile or 
                                  fraction thereof, air line
</TABLE>

<PAGE>   108
                      GTE TELEPHONE OPERATIONS HEADQUARTERS
                   RESALE PRODUCTS & SERVICES - STATE OF TEXAS
                              CONTEL OF TEXAS, INC.
<TABLE>
<CAPTION>
        LOCAL                                                             BILLING   RESALE   DISCOUNT   RETAIL    AVOIDED   RESALE
ST  CO  TARIFF               SERVICE DESCRIPTION                           TYPE    POSITION  POSITION   RATE       COST      RATE
- --  --  ------               -------------------                          -------  --------  --------   ------    -------   ------
<S> <C>  <C>    <C>                                                        <C>     <C>         <C>      <C>        <C>      <C>    
TX  CON                           measurement, per point of termination     MRC     Yes        No         $1.40     $0.19     $1.21
                              Circuit Termination - 4 wire
                                  First 1/4 mile or fraction thereof, 
                                  air line measurement
TX  CON                           per point of termination                  MRC     Yes        No         $8.92     $1.22     $7.70
TX  CON                       Circuit Termination - 4 wire                  NRC     Yes        No       $334.33       N/A   $334.33
                                  Each additional 1/4 mile or 
                                  fraction thereof, air line
TX  CON                           measurement, per point of termination     MRC     Yes        No         $2.23     $0.30     $1.93
                              Optional Features and Functions
                                  Voice Bridging - per port
TX  CON                              Two-wire                               MRC     Yes        No         $4.64     $0.63     $4.01
TX  CON                              Four-wire                              MRC     Yes        No         $4.64     $0.63     $4.01
                                  Data Bridging - per port
TX  CON                              Two-wire                               MRC     Yes        No         $4.64     $0.63     $4.01
TX  CON                              Four-wire                              MRC     Yes        No         $4.64     $0.63     $4.01
                                  Conditioning - per point of termination
TX  CON                              C-type                                 MRC     Yes        No        $11.12     $1.52     $9.60
TX  CON                              Sealing Current                        MRC     Yes        No         $0.00               $0.00
TX  CON                              D Conditioning                         MRC     Yes        No        $11.40     $1.55     $9.85
                                  Circuit Termination
                                     First 1/4 mile or fraction thereof, 
                                     air line measurement
TX  CON                              per point of termination, 
                                     50.0 or 40.8 kbps                      MRC     Yes        No       $121.80    $16.60   $105.20
TX  CON                           Circuit Termination                       NRC     Yes        No       $534.86       N/A   $534.86
                                     Each additional 1/4 mile 
                                     or fraction thereof, 
                                     air line measurement
TX  CON                              per point of termination, 
                                     50.0 or 40.8 kbps                      MRC     Yes        No        $30.45     $4.15    $26.30

TX  CON  B-1    TOLL SERVICES / LONG DISTANCE MESSAGE 
                TELECOMMUNICATIONS SERVICE
                Contel Tariff concurs in the GTESW LDMTS Tariff
                See Footnote (5)


TX  CON  B-2    WATS SERVICES / WIDE AREA TELECOMMUNICATIONS SERVICES
                Contel Tariff concurs in the GTESW WATS Tariff
                See Footnote (5).

TX  CON  G-1    INTRALATA INTEREXCHANGE PRIVATE LINE SERVICES
                Contel Tariff concurs in the Southwestern Bell 
                Private Line Tariff
</TABLE>

<PAGE>   109

                      GTE TELEPHONE OPERATIONS HEADQUARTERS
                   RESALE PRODUCTS & SERVICES - STATE OF TEXAS
                              CONTEL OF TEXAS, INC.
<TABLE>
<CAPTION>
        LOCAL                                                             BILLING   RESALE   DISCOUNT   RETAIL    AVOIDED   RESALE
ST  CO  TARIFF               SERVICE DESCRIPTION                           TYPE    POSITION  POSITION   RATE       COST      RATE
- --  --  ------               -------------------                          -------  --------  --------   ------    -------   ------
<S> <C>  <C>    <C>                                                        <C>     <C>         <C>      <C>        <C>      <C>    
                for Private Line Nondigital Services.  See footnote (5).
TX  CON  G-1    DS1 - 1.544 Mbps Service - Intraexchange Service
                Contel Tariff concurs in GTESW IntraLATA 
                Interexchange Tariff Section 4.  See Footnote (5).

TX  CON  G-1    Digial Data Service (DDS) - INTRAexchange Service
                Contel Tariff concurs in the GTESW IntraLATA 
                Interexchange Tariff Section 5.  See Footnote (5).

TX  CON  H-1    Controlink Digital Channel Service - INTRAexchange 
                Service Contel Tariff concurs in the GTESW Genl Exchage 
                Tariff Section 49. See Footnote (5).

TX  CON         Fractional T1 Service - INTRA exchange Service
                Contel Tariff Concurs in the GTESW IntraLATA 
                Interexchange Tariff Section XX.  See Footnote (5).

TX  CON  I-1    New Centrex Services - CONTEL TARIFF CONCURS IN 
                THE GTESW Genl Exchange Tariff Section 34 for both 
                Analog and Digital CentraNet Service, i.e., rates 
                and services the same.  See Footnote (5).

TX  CON  I-1    SINGLE LINE ISDN SERVICES - CONTEL TARIFF CONCURS IN
                THE GTESW Genl Exchange Tariff Section 33.  See 
                Footnote (5).

TX  CON  I-1    ISDN-PRI SERVICES - CONTEL TARIFF CONCURS IN THE 
                GTESW Genl Exchng Tariff Section 49.  See Footnote (5).

TX  CON  L-1    MOBILE TELEPHONE SERVICE
                    Primary Services
TX  CON                Air-time service locations                           MRC     Yes        Yes       $11.00     $1.50     $9.50
TX  CON                Air-time service locations                           NRC     Yes        No        $36.00       N/A    $36.00
TX  CON                Flat rate service locations                          MRC     Yes        Yes       $11.40     $1.55     $9.85
TX  CON                Flat rate service locations                          NRC     Yes        No      $36.0000       N/A    $36.00
                    Air-time Usage
TX  CON                Flat rate in lieu of air-time usage charges          MRC     Yes        Yes     $20.0000     $2.73    $17.27
</TABLE>

<PAGE>   110
                      GTE TELEPHONE OPERATIONS HEADQUARTERS
                   RESALE PRODUCTS & SERVICES - STATE OF TEXAS
                              CONTEL OF TEXAS, INC.

<TABLE>
<CAPTION>
        LOCAL                                                             BILLING   RESALE   DISCOUNT   RETAIL    AVOIDED   RESALE
ST  CO  TARIFF               SERVICE DESCRIPTION                           TYPE    POSITION  POSITION   RATE       COST      RATE
- --  --  ------               -------------------                          -------  --------  --------   ------    -------   ------
<S> <C>  <C>    <C>                                                        <C>     <C>         <C>      <C>        <C>      <C>    
TX  CON                    Measured air-time (min.)                         MRC     Yes        Yes      $0.3000     $0.04     $0.26
                           Roamer units operating in this utility's 
                           service areas will pay an additional charge 
                           of $1.00 per each completed call.
                        Pocket receiver tone service
TX  CON                    Paging Access                                    MRC     Yes        Yes        $5.80     $0.79     $5.01


                Grandfathered Products and Services
                Discontinued Equipment and Services
                    Fire Reporting Services
                        A-1 Common Equipment
TX  CON  X-1               B1 Up to 10 reporting telephones                 MRC     Yes        Yes       $25.00     $3.41    $21.59
TX  CON  X-1                  C1 each one over 10                           MRC     Yes        Yes        $1.25     $0.17     $1.08
TX  CON  X-1               B2 Up to 20 reporting telephones                 MRC     Yes        Yes       $40.00     $5.45    $34.55
TX  CON  X-1               B3 Up to 30 reporting telephones                 MRC     Yes        Yes       $45.00     $6.13    $38.87
TX  CON  X-1            A2 Fireman line circuits, 2 lines/circuit, each     MRC     Yes        Yes       $10.00     $1.36     $8.64
TX  CON  X-1            A3 Relay, per siren                                 MRC     Yes        Yes        $0.50     $0.07     $0.43
TX  CON  X-1            A4 Censor equipment                                 MRC     Yes        Yes       $27.00     $3.68    $23.32
         X-1            A7 Within Avery, Hooks, Karnack, and Uncertain 
                           exchanges
         X-1            A8 Common Equipment
TX  CON  X-1               B1 Up to 10 reporting telephones                 MRC     Yes        Yes       $30.00     $4.09    $25.91
TX  CON  X-1                  C1 Each one over 10                           MRC     Yes        Yes        $5.00     $0.68     $4.32
TX  CON  X-1               B2 Up to 20 reporting telephones                 MRC     Yes        Yes       $45.00     $6.13    $38.87
         X-1        Customer Transfer Equipment
TX  CON  X-1            A1 Transfer unit equipment with key                 MRC     Yes        Yes        $6.00     $0.82     $5.18
         X-1        Network Access Line Service
         X-1            B1 Business #
         X-1               C1
TX  CON  X-1                  Colmesneil - one party                        MRC     Yes        Yes       $13.20     $1.80    $11.40
TX  CON  X-1                  Colmesneil - key line service                 MRC     Yes        Yes       $19.85     $2.71    $17.14
TX  CON  X-1                  Gary - one party                              MRC     Yes        Yes       $13.20     $1.80    $11.40
TX  CON  X-1                  Avery - key line service                      MRC     Yes        Yes       $19.60     $2.67    $16.93
TX  CON  X-1                  Hooks - key line service                      MRC     Yes        Yes       $19.30     $2.63    $16.67
TX  CON  X-1                  Karnack - key line service                    MRC     Yes        Yes       $20.80     $2.84    $17.96
</TABLE>

<PAGE>   111
                      GTE TELEPHONE OPERATIONS HEADQUARTERS
                   RESALE PRODUCTS & SERVICES - STATE OF TEXAS
                           CONTEL OF TEXAS, INC.
<TABLE>
<CAPTION>
        LOCAL                                                             BILLING   RESALE   DISCOUNT   RETAIL    AVOIDED   RESALE
ST  CO  TARIFF               SERVICE DESCRIPTION                           TYPE    POSITION  POSITION   RATE       COST      RATE
- -- --  -------               -------------------                          -------  --------  --------  --------   -------- --------
<S> <C>  <C>    <C>                                                        <C>     <C>         <C>      <C>        <C>      <C>    




</TABLE>

Footnote: (1) The retail rates above do not include the End User Subscriber Line
              Charge (ECSLC).  The ALEC will be responsible for the business or 
              residential charge, $6.00 and $3.5 respectively.
Footnote: (2) This footnote intentionally left blank.
Footnote: (3) This matrix is subject to Legal and/or Regulatory constraints.
Footnote: (4) Prices contained in this price list have been calculated according
              to the formula: (1) retail price, less (2) avoided retail costs.
Footnote: (5) See GTESW Resale Matrix for all concurring rates and charges.
Footnote: (6) Resale with discount to Business Customers only.  No Resale and No
              Discount to Residential Customers.
<PAGE>   112
                    GTE TELEPHONE OPERATIONS HEADQUARTERS
                 RESALE PRODUCTS & SERVICES - STATE OF TEXAS
                         GTE SOUTHWEST INCORPORATED
<TABLE>
<CAPTION>
         LOCAL                                                          BILLING    RESALE   DISCOUNT    RETAIL    AVOIDED     RESALE
ST  CO  TARIFF                 SERVICE DESCRIPTION                        TYPE    POSITION  POSITION     RATE       COST       RATE
- --  --  ------                 -------------------                        ----    --------  --------     ----       ----       ----
GTESW GENERAL EXCHANGE TARIFF                                                                         
<S> <C> <C>     <C>                                                      <C>      <C>        <C>        <C>        <C>        <C>
                Basic Local Exchange Services:                                                         
TX  GTE     6     Flat Rate Bus One-Party Service                                                      
TX  GTE               Rate Group 1                                       MRC        Yes        Yes      $18.35     $2.50      $15.85
TX  GTE               Rate Group 2                                       MRC        Yes        Yes      $18.90     $2.58      $16.32
TX  GTE               Rate Group 3                                       MRC        Yes        Yes      $19.45     $2.65      $16.80
TX  GTE               Rate Group 4                                       MRC        Yes        Yes      $19.95     $2.72      $17.23
                  Flat Rate Bus - B3 COR; B4 COR; B4                                                   
TX  GTE               Rate Group 1                                       MRC        Yes        Yes      $12.10     $1.65      $10.45
TX  GTE               Rate Group 2                                       MRC        Yes        Yes      $12.50     $1.70      $10.80
TX  GTE               Rate Group 3                                       MRC        Yes        Yes      $12.85     $1.75      $11.10
TX  GTE               Rate Group 4                                       MRC        Yes        Yes      $13.20     $1.80      $11.40
                  Flat Rate Bus - B8                                                                   
TX  GTE               Rate Group 1                                       MRC        Yes        Yes      $10.30     $1.40       $8.90
TX  GTE               Rate Group 2                                       MRC        Yes        Yes      $10.60     $1.44       $9.16
TX  GTE               Rate Group 3                                       MRC        Yes        Yes      $10.90     $1.49       $9.41
TX  GTE               Rate Group 4                                       MRC        Yes        Yes      $11.20     $1.53       $9.67
                  Flat Rate Bus - Manual (Key) Trunk                                                   
TX  GTE               Rate Group 1                                       MRC        Yes        Yes      $22.00     $3.00      $19.00
TX  GTE               Rate Group 2                                       MRC        Yes        Yes      $22.65     $3.09      $19.56
TX  GTE               Rate Group 3                                       MRC        Yes        Yes      $23.35     $3.18      $20.17
TX  GTE               Rate Group 4                                       MRC        Yes        Yes      $23.90     $3.26      $20.64
                  Flat Rate Bus - Automatic (PBX) Trunk                                                
TX  GTE               Rate Group 1                                       MRC        Yes        Yes      $29.40     $4.01      $25.39
TX  GTE               Rate Group 2                                       MRC        Yes        Yes      $30.25     $4.12      $26.13
TX  GTE               Rate Group 3                                       MRC        Yes        Yes      $31.10     $4.24      $26.86
TX  GTE               Rate Group 4                                       MRC        Yes        Yes      $31.90     $4.35      $27.55
                  Flat Rate Bus - ISAL                                                                 
TX  GTE               Rate Group 1                                       MRC        Yes        Yes      $18.35     $2.50      $15.85
TX  GTE               Rate Group 2                                       MRC        Yes        Yes      $18.90     $2.58      $16.32
TX  GTE               Rate Group 3                                       MRC        Yes        Yes      $19.45     $2.65      $16.80
TX  GTE               Rate Group 4                                       MRC        Yes        Yes      $19.95     $2.72      $17.23
                  Flat Rate Bus - Fire Reporting Lines                                                 
TX  GTE               Rate Group 1                                       MRC        Yes        Yes      $18.05     $2.46      $15.59
TX  GTE               Rate Group 2                                       MRC        Yes        Yes      $18.60     $2.54      $16.06
</TABLE>
<PAGE>   113


                    GTE TELEPHONE OPERATIONS HEADQUARTERS
                 RESALE PRODUCTS & SERVICES - STATE OF TEXAS
                          GTE SOUTHWEST INCORPORATED
<TABLE>
<CAPTION>
         LOCAL                                                               BILLING    RESALE  DISCOUNT  RETAIL    AVOIDED   RESALE
ST   CO  TARIFF              SERVICE DESCRIPTION                               TYPE    POSITION POSITION  RATE       COST      RATE
- --   --  ------              -------------------                          -------  --------  --------   ------    -------   ------
<S> <C>  <C>     <C>                                                         <C>       <C>      <C>       <C>       <C>       <C>
                                                                                                         
TX  GTE              Rate Group 3                                              MRC        Yes       Yes   $19.10     $2.60    $16.50
TX  GTE              Rate Group 4                                              MRC        Yes       Yes   $19.55     $2.66    $16.89
            6    Flat Rate Bus One Party - Non Optional EAS                                                                   
TX  GTE              Rate Group 1                                              MRC        Yes       Yes    $2.95     $0.40     $2.55
TX  GTE              Rate Group 2                                              MRC        Yes       Yes    $3.65     $0.50     $3.15
TX  GTE              Rate Group 3                                              MRC        Yes       Yes    $7.00     $0.95     $6.05
TX  GTE              Rate Group 4-8                                            MRC        Yes       Yes   $19.00     $2.59    $16.41
                 Flat Rate Bus - B3/B4 COR; B4;B8 - Non Optional EAS                                                          
TX  GTE              Rate Group 1                                              MRC        Yes       Yes    $2.95     $0.40     $2.55
TX  GTE              Rate Group 2                                              MRC        Yes       Yes    $3.65     $0.50     $3.15
TX  GTE              Rate Group 3                                              MRC        Yes       Yes    $7.00     $0.95     $6.05
TX  GTE              Rate Group 4-8                                            MRC        Yes       Yes   $19.00     $2.59    $16.41
                 Flat Rate Bus - Manual (Key) Trunk - Non Optional EAS                                                        
TX  GTE              Rate Group 1                                              MRC        Yes       Yes    $3.50     $0.48     $3.02
TX  GTE              Rate Group 2                                              MRC        Yes       Yes    $4.40     $0.60     $3.80
TX  GTE              Rate Group 3                                              MRC        Yes       Yes    $7.00     $0.95     $6.05
TX  GTE              Rate Group 4-8                1-24 trunks                 MRC        Yes       Yes   $33.25     $4.53    $28.72
TX  GTE                                              25-48 trunks              MRC        Yes       Yes   $25.00     $3.41    $21.59
TX  GTE                                              49-96 trunks              MRC        Yes       Yes   $20.00     $2.73    $17.27
TX  GTE                                              97+ trunks                MRC        Yes       Yes   $15.00     $2.04    $12.96
                 Flat Rate Bus - Automatic (PBX) Trunk - Non Optional EAS                                                     
TX  GTE              Rate Group 1                                              MRC        Yes       Yes    $5.15     $0.70     $4.45
TX  GTE              Rate Group 2                                              MRC        Yes       Yes    $6.40     $0.87     $5.53
TX  GTE              Rate Group 3                                              MRC        Yes       Yes    $7.00     $0.95     $6.05
TX  GTE              Rate Group 4-8                1-24 trunks                 MRC        Yes       Yes   $33.25     $4.53    $28.72
TX  GTE                                              25-48 trunks              MRC        Yes       Yes   $25.00     $3.41    $21.59
TX  GTE                                              49-96 trunks              MRC        Yes       Yes   $20.00     $2.73    $17.27
TX  GTE                                              97+ trunks                MRC        Yes       Yes   $15.00     $2.04    $12.96
                 Flat Rate Bus - ISAL - Non Optional EAS                                                                      
TX  GTE              Rate Group 1                                              MRC        Yes       Yes    $2.95     $0.40     $2.55
TX  GTE              Rate Group 2                                              MRC        Yes       Yes    $3.65     $0.50     $3.15
TX  GTE              Rate Group 3                                              MRC        Yes       Yes    $7.00     $0.95     $6.05
TX  GTE              Rate Group 4-8                                            MRC        Yes       Yes   $19.00     $2.59    $16.41
</TABLE>

<PAGE>   114

                    GTE TELEPHONE OPERATIONS HEADQUARTERS
                 RESALE PRODUCTS & SERVICES - STATE OF TEXAS
                          GTE SOUTHWEST INCORPORATED
<TABLE>
<CAPTION>
        LOCAL                                                        BILLING   RESALE     DISCOUNT      RETAIL    AVOIDED    RESALE
ST   CO TARIFF             SERVICE DESCRIPTION                        TYPE    POSITION    POSITION       RATE       COST      RATE
- --   -- ------             -------------------                       -------  --------    --------      ------    -------    ------
<S> <C> <C>    <C>                                                   <C>      <C>         <C>           <C>       <C>        <C>
               Flat Rate Res - One-Party                                                                                   
TX  GTE            Rate Group 1                                      MRC       No          No            $7.10       N/A        N/A
TX  GTE            Rate Group 2                                      MRC       No          No            $7.30       N/A        N/A
TX  GTE            Rate Group 3                                      MRC       No          No            $7.50       N/A        N/A
TX  GTE            Rate Group 4                                      MRC       No          No            $7.65       N/A        N/A
               Flat Rate Res - R2                                                                                          
TX  GTE            Rate Group 1                                      MRC       No          No            $5.30       N/A        N/A
TX  GTE            Rate Group 2                                      MRC       No          No            $5.45       N/A        N/A
TX  GTE            Rate Group 3                                      MRC       No          No            $5.65       N/A        N/A
TX  GTE            Rate Group 4                                      MRC       No          No            $5.75       N/A        N/A
               Flat Rate Res - R3/R4 COR;R4;R4 Rural                                                                       
TX  GTE            Rate Group 1                                      MRC       No          No            $4.60       N/A        N/A
TX  GTE            Rate Group 2                                      MRC       No          No            $4.70       N/A        N/A
TX  GTE            Rate Group 3                                      MRC       No          No            $4.90       N/A        N/A
TX  GTE            Rate Group 4                                      MRC       No          No            $5.00       N/A        N/A
               Flat Rate Res - R8 Rural                                                                                    
TX  GTE            Rate Group 1                                      MRC       No          No            $3.90       N/A        N/A
TX  GTE            Rate Group 2                                      MRC       No          No            $4.00       N/A        N/A
TX  GTE            Rate Group 3                                      MRC       No          No            $4.10       N/A        N/A
TX  GTE            Rate Group 4                                      MRC       No          No            $4.20       N/A        N/A
               Flat Rate Res - Manual (Key) Trunk                                                                          
TX  GTE            Rate Group 1                                      MRC       No          No            $8.50       N/A        N/A
TX  GTE            Rate Group 2                                      MRC       No          No            $8.75       N/A        N/A
TX  GTE            Rate Group 3                                      MRC       No          No            $9.00       N/A        N/A
TX  GTE            Rate Group 4                                      MRC       No          No            $9.20       N/A        N/A
                                                                                                                           
               Flat Rate Res - R1;R2;R3/R4 COR;R4;R4 Rural;R8 Rural                                                        
                Non Optional EAS                                                                                           
TX  GTE            Rate Group 1                                      MRC       No          No            $1.10       N/A        N/A
TX  GTE            Rate Group 2                                      MRC       No          No            $1.40       N/A        N/A
TX  GTE            Rate Group 3                                      MRC       No          No            $3.50       N/A        N/A
TX  GTE            Rate Group 4-8                                    MRC       No          No            $7.25       N/A        N/A
               Flat Rate Res - Manual (Key) Trunk - Non Optional EAS                                                       
TX  GTE            Rate Group 1                                      MRC       No          No            $1.35       N/A        N/A
TX  GTE            Rate Group 2                                      MRC       No          No            $1.70       N/A        N/A
</TABLE>                                                                    
                                                                            
                                                                            
<PAGE>   115


                    GTE TELEPHONE OPERATIONS HEADQUARTERS
                 RESALE PRODUCTS & SERVICES - STATE OF TEXAS
                          GTE SOUTHWEST INCORPORATED
<TABLE>
<CAPTION>
        LOCAL                                                         BILLING    RESALE    DISCOUNT  RETAIL    AVOIDED     RESALE
ST  CO TARIFF                    SERVICE DESCRIPTION                   TYPE     POSITION   POSITION   RATE       COST       RATE
- --  -- ------                    -------------------                   ----     --------   ---------  ----       ----       ----
<S> <C> <C>    <C>                                                      <C>      <C>        <C>        <C>        <C>        <C>
TX  GTE            Rate Group 3                                          MRC         No       No        $3.50       N/A         N/A
TX  GTE            Rate Group 4-8                                        MRC         No       No        $8.75       N/A         N/A
                                                                                                      
TX  GTE    6                TEL - ASSISTANCE                                                           
               Flat Rate Res - One Party                                                               
TX  GTE            Rate Group 1                                          MRC        Yes       No        $2.49       N/A       $2.49
TX  GTE            Rate Group 2                                          MRC        Yes       No        $2.56       N/A       $2.56
TX  GTE            Rate Group 3                                          MRC        Yes       No        $2.63       N/A       $2.63
TX  GTE            Rate Group 4                                          MRC        Yes       No        $2.68       N/A       $2.68
               Flat Rate Res - Two Party                                                               
TX  GTE            Rate Group 1                                          MRC        Yes       No        $1.86       N/A       $1.86
TX  GTE            Rate Group 2                                          MRC        Yes       No        $1.91       N/A       $1.91
TX  GTE            Rate Group 3                                          MRC        Yes       No        $1.98       N/A       $1.98
TX  GTE            Rate Group 4                                          MRC        Yes       No        $2.01       N/A       $2.01
               Flat Rate Res - Four Party, Customer Owner             
                   Rural 3 & 4 Party Lines                            
TX  GTE            Rate Group 1                                          MRC        Yes       No        $1.61       N/A       $1.61
TX  GTE            Rate Group 2                                          MRC        Yes       No        $1.65       N/A       $1.65
TX  GTE            Rate Group 3                                          MRC        Yes       No        $1.72       N/A       $1.72
TX  GTE            Rate Group 4                                          MRC        Yes       No        $1.75       N/A       $1.75
               Flat Rate Res - Eight Party Rural                                                       
TX  GTE            Rate Group 1                                          MRC        Yes       No        $1.37       N/A       $1.37
TX  GTE            Rate Group 2                                          MRC        Yes       No        $1.40       N/A       $1.40
TX  GTE            Rate Group 3                                          MRC        Yes       No        $1.44       N/A       $1.44
TX  GTE            Rate Group 4                                          MRC        Yes       No        $1.47       N/A       $1.47
               TEL-ASSISTANCE Mandatory EAS                                                            
               All Grades of Res Flat Rate Service                                                     
TX  GTE            Rate Group 1                                          MRC        Yes       No        $0.39       N/A       $0.39
TX  GTE            Rate Group 2                                          MRC        Yes       No        $0.49       N/A       $0.49
TX  GTE            Rate Group 3                                          MRC        Yes       No        $1.23       N/A       $1.23
TX  GTE            Rate Group 4                                          MRC        Yes       No        $2.54       N/A       $2.54
               TEL-ASSISTANCE - Optional Measured Service                                              
TX  GTE        Residence Service Exchange Access Arrangement             MRC        Yes       No        $2.98       N/A       $2.98
TX  GTE        Completed Calls - Surrpgate Usage                         MRC        Yes       No        $2.30       N/A       $2.30
                                                                                                      
TX  GTE    6                LIFELINE LOCAL EXCHANGE SERVICE           
</TABLE>
<PAGE>   116
                                      
                    GTE TELEPHONE OPERATIONS HEADQUARTERS
                 RESALE PRODUCTS & SERVICES - STATE OF TEXAS
                          GTE SOUTHWEST INCORPORATED
<TABLE>
<CAPTION>
        LOCAL                                                          BILLING   RESALE     DISCOUNT    RETAIL    AVOIDED    RESALE
ST   CO TARIFF                     SERVICE DESCRIPTION                   TYPE    POSITION   POSITION     RATE       COST      RATE
- --   -- ------                     -------------------                 -------   --------   --------    ------    -------    ------
<S> <C> <C>    <C>                                                     <C>       <C>        <C>         <C>       <C>         <C>
               FCC END USER CALC IS WAIVED FOR                                                                             
                   LIFELINE CUSTOMER                                                                                       
TX  GTE        Residence One Party - Flat Rate                                                                             
TX  GTE            Rate Group 1                                         MRC      Yes          No          $3.60       N/A      $3.60
TX  GTE            Rate Group 2                                         MRC      Yes          No          $3.80       N/A      $3.80
TX  GTE            Rate Group 3                                         MRC      Yes          No          $4.00       N/A      $4.00
TX  GTE            Rate Group 4                                         MRC      Yes          No          $4.15       N/A      $4.15
               Residence Two Party - Flat Rate                                                                             
TX  GTE            Rate Group 1                                         MRC      Yes          No          $1.80       N/A      $1.80
TX  GTE            Rate Group 2                                         MRC      Yes          No          $1.95       N/A      $1.95
TX  GTE            Rate Group 3                                         MRC      Yes          No          $2.15       N/A      $2.15
TX  GTE            Rate Group 4                                         MRC      Yes          No          $2.25       N/A        N/A
               Residence Four Party - Flat Rate                                                                            
TX  GTE            Rate Group 1                                         MRC      Yes          No          $1.10       N/A      $1.10
TX  GTE            Rate Group 2                                         MRC      Yes          No          $1.20       N/A      $1.20
TX  GTE            Rate Group 3                                         MRC      Yes          No          $1.40       N/A      $1.40
TX  GTE            Rate Group 4                                         MRC      Yes          No          $1.50       N/A      $1.50
TX  GTE        Lifeline OMS - Exchange Access                           MRC      Yes          No          $5.00       N/A      $5.00
               NOTE:  Lifeline OMS Usage, no discount                                                                      
                      same as below                                                                                        
                                                                                                                           
TX  GTE     6  Central Office Operator Access Trunk                     MRC      Yes          Yes        $35.00     $4.77     $30.23
                                                                                                                           
            6  Outside Base Rate Area Additives                                                                            
                   [See Footnote:  (5)]                                                                                    
TX  GTE            One Party                                            MRC      Yes          Yes         $2.00     $0.27      $1.73
TX  GTE            Multiparty                                           MRC      Yes          Yes         $0.95     $0.13      $0.82
                                                                                                                           
            6  Optional Measured Service                                                                                   
                   (Restricted to certain exchanges)                                                                       
TX  GTE            Bus Local Exchange Access                           USAGE     Yes          Yes      $26.4500   $3.6051     $22.84
TX  GTE            Res Local Exchange Access                           USAGE      No          No        $8.5000       N/A        N/A
                                                                                                                           
                   Set - Up [See Footnote:  (5)]                                                                           
TX  GTE            Usage Rates - 0 - 7 Miles                           USAGE     Yes          Yes       $0.0250   $0.0034      $0.02
TX  GTE                           7 - 14 Miles                         USAGE     Yes          Yes       $0.0350   $0.0048      $0.03
TX  GTE                           14 - 21                              USAGE     Yes          Yes       $0.0500   $0.0068      $0.04
TX  GTE                           21 - 28 Miles                        USAGE     Yes          Yes       $0.0700   $0.0095      $0.06
TX  GTE                           28 + Miles                           USAGE     Yes          Yes       $0.0900   $0.0123      $0.08
</TABLE>
<PAGE>   117




                    GTE TELEPHONE OPERATIONS HEADQUARTERS
                 RESALE PRODUCTS & SERVICES - STATE OF TEXAS
                          GTE SOUTHWEST INCORPORATED
<TABLE>
<CAPTION>
        LOCAL                                                         BILLING     RESALE     DISCOUNT     RETAIL    AVOIDED   RESALE
ST   CO TARIFF                SERVICE DESCRIPTION                      TYPE      POSITION    POSITION      RATE       COST     RATE
- --   -- ------                -------------------                     -------    --------    --------     ------    -------   ------
<S> <C> <C>    <C>                                                   <C>         <C>         <C>          <C>       <C>       <C>
                                                                                                                             
                   Each Minute [See Footnote:  (5)]                                                                          
TX  GTE            Usage Rates - 0 - 7 Miles                          USAGE       Yes          Yes        $0.0150   $0.0020    $0.01
TX  GTE                           7 - 14 Miles                        USAGE       Yes          Yes        $0.0210   $0.0029    $0.02
TX  GTE                           14 - 21                             USAGE       Yes          Yes        $0.0300   $0.0041    $0.03
TX  GTE                           21 - 28 Miles                       USAGE       Yes          Yes        $0.0420   $0.0057    $0.04
TX  GTE                           28 + Miles                          USAGE       Yes          Yes        $0.0540   $0.0074    $0.05
                                                                                                                             
                   Set - Up - Discount Period                                                                                
                         [See Footnote:  (5)]                                                                                
TX  GTE            Usage Rates - 0 - 7 Miles                          USAGE       Yes          Yes        $0.0150   $0.0020    $0.01
TX  GTE                           7 - 14 Miles                        USAGE       Yes          Yes        $0.0210   $0.0029    $0.02
TX  GTE                           14 - 21                             USAGE       Yes          Yes        $0.0300   $0.0041    $0.03
TX  GTE                           21 - 28 Miles                       USAGE       Yes          Yes        $0.0420   $0.0057    $0.04
TX  GTE                           28 + Miles                          USAGE       Yes          Yes        $0.0540   $0.0074    $0.05
                                                                                                                             
                   Each Minute - Discount Period                                                                             
                         [See Footnote:  (5)]                                                                                
TX  GTE            Usage Rates - 0 - 7 Miles                          USAGE       Yes          Yes        $0.0090   $0.0012    $0.01
TX  GTE                           7 - 14 Miles                        USAGE       Yes          Yes        $0.0126   $0.0017    $0.01
TX  GTE                           14 - 21                             USAGE       Yes          Yes        $0.0180   $0.0025    $0.02
TX  GTE                           21 - 28 Miles                       USAGE       Yes          Yes        $0.0252   $0.0034    $0.02
TX  GTE                           28 + Miles                          USAGE       Yes          Yes        $0.0324   $0.0044    $0.03
                                                                                                                             
TX  GTE     6  Measured Service Detailed Billing                       MRC        Yes          Yes          $1.00     $0.14    $0.86
TX  GTE            Per Bill Page                                       NRC        Yes          No           $0.20       N/A    $0.20
                                                                                                                             
TX  GTE     6  Associate Number Non Aggregation                        MRC        Yes          Yes          $1.00     $0.14    $0.86
                                                                                                                             
            6  Optional Extended Metro Service                                                                               
                   (Restricted to certain exchanges)                                                                         
TX  GTE            Business One Party                                  MRC        Yes          Yes         $79.10    $10.78   $68.32
TX  GTE            Manual (Key) Trunk                                  MRC        Yes          Yes         $95.70    $13.04   $82.66
TX  GTE                                                                                                                      
TX  GTE            Automatic (PBX) Trunk                               MRC        Yes          Yes        $138.35    $18.86  $119.49
TX  GTE            ISAL                                                MRC        Yes          Yes         $79.10    $10.78   $68.32
TX  GTE            Residence One Party                                 MRC         No          No          $29.00       N/A      N/A
TX  GTE            R2                                                  MRC         No          No          $21.55       N/A      N/A
</TABLE>
<PAGE>   118

                    GTE TELEPHONE OPERATIONS HEADQUARTERS
                 RESALE PRODUCTS & SERVICES - STATE OF TEXAS
                          GTE SOUTHWEST INCORPORATED
<TABLE>
<CAPTION>
       LOCAL                                                             BILLING   RESALE    DISCOUNT    RETAIL    AVOIDED    RESALE
ST  CO TARIFF                                SERVICE DESCRIPTION           TYPE   POSITION   POSITION    RATE       COST       RATE
- -- --- ------                                -------------------         -------  --------   --------    -------   --------   ------
<S> <C>        <C>                                                        <C>      <C>        <C>         <C>       <C>        <C>
TX  GTE             Res Manual (Key) Trunk                                    MRC      No        No        $50.55       N/A      N/A
                                                                                                      
            6   Special Rate Area Service [Applies to Specific                                         
                Exchanges / Also See Footnote: (5)]                                                    
TX  GTE             Zone 1&2                                                  MRC     Yes        Yes        $1.00     $0.14    $0.86
TX  GTE             Zone 3                                                    MRC     Yes        Yes        $2.00     $0.27    $1.73
TX  GTE             Zone 4                                                    MRC     Yes        Yes        $3.00     $0.41    $2.59
TX  GTE             Zone 5                                                    MRC     Yes        Yes        $4.00     $0.55    $3.45
TX  GTE             Zone 6&7                                                  MRC     Yes        Yes        $5.00     $0.68    $4.32
                                                                                                                              
            6     Local Calling Plans - Optional EAS [Restricted to                                                            
                  certain exchanges / Also See Footnote:  (5)]                                                                 
                                                                                                                              
                    Community Calling Plan                                                                                     
TX  GTE                Monthly Rate                                           MRC     Yes        Yes        $1.00     $0.14    $0.86
                       CCP Usage Rates                                                                                         
                          First Minute                                                                                         
TX  GTE                      0-7 Miles                                       Usage    Yes        Yes      $0.0300   $0.0041    $0.03
TX  GTE                      8-14 Miles                                      Usage    Yes        Yes      $0.0420   $0.0057    $0.04
TX  GTE                      15-21 Miles                                     Usage    Yes        Yes      $0.0600   $0.0082    $0.05
TX  GTE                      22-28 Miles                                     Usage    Yes        Yes      $0.0840   $0.0114    $0.07
TX  GTE                      29+ Miles                                       Usage    Yes        Yes      $0.0930   $0.0127    $0.08
                          Ea Add'l Minute                                                                                      
TX  GTE                      0-7 Miles                                       Usage    Yes        Yes      $0.0150   $0.0020    $0.01
TX  GTE                      8-14 Miles                                      Usage    Yes        Yes      $0.0210   $0.0029    $0.02
TX  GTE                      15-21 Miles                                     Usage    Yes        Yes      $0.0300   $0.0041    $0.03
TX  GTE                      22-28 Miles                                     Usage    Yes        Yes      $0.0420   $0.0057    $0.04
TX  GTE                      29+ Miles                                       Usage    Yes        Yes      $0.0540   $0.0074    $0.05
                       CCP Usage Rates - 25% Discount                                                                          
                          First Minute                                                                                         
TX  GTE                      0-7 Miles                                       Usage    Yes        Yes      $0.0225   $0.0031    $0.02
TX  GTE                      8-14 Miles                                      Usage    Yes        Yes      $0.0315   $0.0043    $0.03
TX  GTE                      15-21 Miles                                     Usage    Yes        Yes      $0.0450   $0.0061    $0.04
TX  GTE                      22-28 Miles                                     Usage    Yes        Yes      $0.0630   $0.0086    $0.05
TX  GTE                      29+ Miles                                       Usage    Yes        Yes      $0.0698   $0.0095    $0.06
                          Ea Add'l Minute                                                                                      
TX  GTE                      0-7 Miles                                       Usage    Yes        Yes      $0.0113   $0.0015    $0.01
TX  GTE                      8-14 Miles                                      Usage    Yes        Yes      $0.0158   $0.0021    $0.01
TX  GTE                      15-21 Miles                                     Usage    Yes        Yes      $0.0225   $0.0031    $0.02
TX  GTE                      22-28 Miles                                     Usage    Yes        Yes      $0.0315   $0.0043    $0.03
TX  GTE                      29+ Miles                                       Usage    Yes        Yes      $0.0405   $0.0055    $0.03
                       CCP Usage Rates - 40% Discount                                                                          
                          First Minute                                                                                        
TX  GTE                      0-7 Miles                                       Usage    Yes        Yes      $0.0180   $0.0025    $0.02

</TABLE>
<PAGE>   119

                    GTE TELEPHONE OPERATIONS HEADQUARTERS
                 RESALE PRODUCTS & SERVICES - STATE OF TEXAS
                          GTE SOUTHWEST INCORPORATED
<TABLE>
<CAPTION>
        LOCAL                                                            BILLING     RESALE     DISCOUNT   RETAIL    AVOIDED  RESALE
ST  CO TARIFF                    SERVICE DESCRIPTION                      TYPE      POSITION    POSITION    RATE       COST    RATE
- --  -- ------                    -------------------                     -------   ---------   ---------  -------   -------  -------
<S> <C> <C>    <C>                                                        <C>        <C>         <C>       <C>       <C>      <C>
TX  GTE                   8-14 Miles                                        Usage       Yes       Yes      $0.0252   $0.0034   $0.02
TX  GTE                   15-21 Miles                                       Usage       Yes       Yes      $0.0360   $0.0049   $0.03
TX  GTE                   22-28 Miles                                       Usage       Yes       Yes      $0.0504   $0.0069   $0.04
TX  GTE                   29+ Miles                                         Usage       Yes       Yes      $0.0558   $0.0076   $0.05
                       Ea Add'l Minute                                                                                        
TX  GTE                   0-7 Miles                                         Usage       Yes       Yes      $0.0090   $0.0012   $0.01
TX  GTE                   8-14 Miles                                        Usage       Yes       Yes      $0.0126   $0.0017   $0.01
TX  GTE                   15-21 Miles                                       Usage       Yes       Yes      $0.0180   $0.0025   $0.02
TX  GTE                   22-28 Miles                                       Usage       Yes       Yes      $0.0252   $0.0034   $0.02
TX  GTE                   29+ Miles                                         Usage       Yes       Yes      $0.0324   $0.0044   $0.03
                                                                                                                             
                 Local Calling Plans / Optional EAS - Detail Billing                                                          
TX  GTE             Monthly Detail                                           MRC        Yes       Yes        $0.40     $0.05   $0.35
TX  GTE             Per Page                                                 NRC        Yes       No         $0.10       N/A   $0.10
            6    Premium Calling Plan                                                                                         
                    Buda, Dripping Springs, Mt Calm,                                                                          
                    Georgetown, Somerset, and Lavernia.                                                                       
TX  GTE                B1                                                    MRC        Yes       Yes       $33.35     $4.55  $28.80
TX  GTE                Key                                                   MRC        Yes       Yes       $39.00     $5.32  $33.68
TX  GTE                PBX                                                   MRC        Yes       Yes       $54.50     $7.43  $47.07
TX  GTE                R1                                                    MRC         No       No        $15.20       N/A     N/A
                                                                                                                             
                    Kilgore, Hallsville, Christoval, and Mertzon.                                                             
TX  GTE                B1                                                    MRC        Yes       Yes       $22.00     $3.00  $19.00
TX  GTE                Key                                                   MRC        Yes       Yes       $25.10     $3.42  $21.68
TX  GTE                PBX                                                   MRC        Yes       Yes       $35.90     $4.89  $31.01
TX  GTE                R1                                                    MRC         No       No        $10.00       N/A     N/A
</TABLE>
<PAGE>   120

                    GTE TELEPHONE OPERATIONS HEADQUARTERS
                 RESALE PRODUCTS & SERVICES - STATE OF TEXAS
                          GTE SOUTHWEST INCORPORATED
<TABLE>
<CAPTION>
        LOCAL                                                               BILLING   RESALE     DISCOUNT  RETAIL    AVOIDED  RESALE
ST   CO TARIFF                           SERVICE DESCRIPTION                  TYPE   POSITION    POSITION   RATE       COST     RATE
- --   -- -----                            -------------------                -------  --------    --------  ------    -------  ------
<S> <C> <C>    <C>                                                          <C>      <C>         <C>       <C>       <C>      <C>
                  Boerne, Kyle, Wimberly, Charlotte, and Jourdanton.                                       
TX  GTE              B1                                                     MRC        Yes          Yes     $36.70     $5.00  $31.70
TX  GTE              Key                                                    MRC        Yes          Yes     $42.90     $5.85  $37.05
TX  GTE              PBX                                                    MRC        Yes          Yes     $59.95     $8.17  $51.78
TX  GTE              R1                                                     MRC         No          No      $16.75       N/A     N/A
                                                                                                                              
                  Laferia, Lyford, Raymondville, Santa Rosa & Weslaco                                                         
TX  GTE              B1                                                     MRC        Yes          Yes     $50.00     $6.82  $43.19
TX  GTE              Key                                                    MRC        Yes          Yes     $50.00     $6.82  $43.19
TX  GTE              PBX/CentraNet                                          MRC        Yes          Yes     $50.00     $6.82  $43.19
TX  GTE              R1                                                     MRC         No          No      $25.00       N/A     N/A
                                                                                                                              
            6  Premium Plus Calling Plan                                                                                      
                  Buda, Dripping Springs, Mt Calm, Georgetown,                                                                
                  Somerset, and Lavernia.                                                                                     
TX  GTE              B1                                                     MRC        Yes          Yes     $66.65     $9.08  $57.57
TX  GTE              Key                                                    MRC        Yes          Yes     $78.00    $10.63  $67.37
TX  GTE              PBX                                                    MRC        Yes          Yes    $108.95    $14.85  $94.10
TX  GTE              R1                                                     MRC         No          No      $30.40       N/A     N/A
                                                                                                                              
                  Kilgore, Hallsville, Christoval, and Mertzon                                                                
TX  GTE              B1                                                     MRC        Yes          Yes     $44.00     $6.00  $38.00
TX  GTE              Key                                                    MRC        Yes          Yes     $51.35     $7.00  $44.35
TX  GTE              PBX                                                    MRC        Yes          Yes     $71.70     $9.77  $61.93
TX  GTE              R1                                                     MRC         No          No      $20.00       N/A     N/A
                                                                                                                              
                  Argyle, Denton & Justin                                                                                     
TX  GTE              B1                                                     MRC        Yes          Yes     $52.50     $7.16  $45.34
TX  GTE              Key                                                    MRC        Yes          Yes     $52.50     $7.16  $45.34
TX  GTE              PBX                                                    MRC        Yes          Yes     $52.50     $7.16  $45.34
TX  GTE              CentraNet                                              MRC        Yes          Yes     $52.50     $7.16  $45.34
TX  GTE              R1                                                     MRC         No          No      $22.50       N/A     N/A
                                                                                                                              
                  Boerne, Kyle, Wimberly, Charlotte, and Jourdanton.                                                          
TX  GTE              B1                                                     MRC        Yes          Yes     $73.35    $10.00  $63.35
</TABLE>
<PAGE>   121

                    GTE TELEPHONE OPERATIONS HEADQUARTERS
                 RESALE PRODUCTS & SERVICES - STATE OF TEXAS
                          GTE SOUTHWEST INCORPORATED
<TABLE>
<CAPTION>
        LOCAL                                                      BILLING     RESALE     DISCOUNT      RETAIL    AVOIDED     RESALE
ST   CO TARIFF                   SERVICE DESCRIPTION                TYPE      POSITION    POSITION       RATE       COST       RATE
- --   -- ------                   -------------------               -------    --------    --------      ------    -------     ------
<S> <C>  <C>   <C>                                                <C>         <C>         <C>          <C>        <C>       <C>
TX  GTE                   Key                                      MRC        Yes          Yes          $85.80    $11.69      $74.11
TX  GTE                   PBX                                      MRC        Yes          Yes         $119.85    $16.34     $103.51
TX  GTE                   R1                                       MRC         No          No           $33.45       N/A         N/A
                                                                   
            6   Expanded Local Calling-Non Optional EAS            
TX  GTE             Various Exchanges                              
TX  GTE             Business                                       MRC        Yes          Yes           $7.00     $0.95       $6.05
TX  GTE             Residence                                      MRC         No          No            $3.50       N/A         N/A
                                                                   
                    Gunter                                         
TX  GTE             Business                                       MRC        Yes          Yes           $5.68     $0.77       $4.91
TX  GTE             Residence                                      MRC         No          No            $2.87       N/A         N/A
                                                                   
                    Grand Saline                                   
TX  GTE             Business                                       MRC        Yes          Yes           $3.26     $0.44       $2.82
TX  GTE             Residence                                      MRC         No          No            $1.63       N/A         N/A
                                                                   
                    Waelder                                        
TX  GTE             Business                                       MRC        Yes          Yes           $3.65     $0.50       $3.15
TX  GTE             Residence                                      MRC         No          No            $1.82       N/A         N/A
                                                                   
                    Dickinson                                      
TX  GTE             Business                                       MRC        Yes          Yes           $3.96     $0.54       $3.42
TX  GTE             Residence                                      MRC         No          No            $1.98       N/A         N/A
                                                                   
                    Ben Wheeler                                    
TX  GTE             Business                                       MRC        Yes          Yes           $6.25     $0.85       $5.40
TX  GTE             Residence                                      MRC         No          No            $3.12       N/A         N/A
                                                                   
                    Blessing                                       
TX  GTE             Business                                       MRC        Yes          Yes           $6.32     $0.86       $5.46
TX  GTE             Residence                                      MRC         No          No            $3.16       N/A         N/A
                                                                   
                    Hubbard                                        
TX  GTE             Business                                       MRC        Yes          Yes           $6.10     $0.83       $5.27
</TABLE>
<PAGE>   122

                    GTE TELEPHONE OPERATIONS HEADQUARTERS
                 RESALE PRODUCTS & SERVICES - STATE OF TEXAS
                          GTE SOUTHWEST INCORPORATED
<TABLE>
<CAPTION>
        LOCAL                                                            BILLING   RESALE   DISCOUNT  RETAIL    AVOIDED       RESALE
ST  CO TARIFF                               SERVICE DESCRIPTION           TYPE    POSITION  POSITION   RATE       COST         RATE
- --  -- ------                               -------------------           ----    --------  --------   ----       ----         ----
<S> <C> <C>    <C>                                                        <C>      <C>       <C>       <C>       <C>           <C>
TX  GTE            Residence                                                 MRC       No        No        $3.05       N/A      N/A
                                                                                                      
           10  Vacation Service [See Footnote:  (5)]                                                   
TX  GTE                   50% reduction in customers rates                                             
                         - Incl access lines and miscellaneous services                                 
                                                                                                      
TX  GTE    12  Directory Listings (Non-publish)                              MRC       No        No        $1.65     $0.22      N/A
TX  GTE        Directory Listings (Non-listed)                               MRC       No        No        $1.65     $0.22      N/A
               Extra listing, Foreign listings                                                                                     
TX  GTE            Residence                                                 MRC       No        No        $0.55     $0.07      N/A
TX  GTE            Business                                                  MRC       No        No        $1.10     $0.15      N/A
TX  GTE        Residence Family Plan Directory listing                       MRC       No        No        $0.85     $0.12      N/A
                                                                                                                                  
           13  Service Charges:                                                                                                    
TX  GTE        Service Order Charge Primary - Bus                            NRC       No        No       $31.50       N/A      N/A
TX  GTE        Service Order Charge Primary - Res                            NRC       No        No       $21.00       N/A      N/A
TX  GTE        Service Order Charge Secondary - Bus                          NRC       No        No       $13.50       N/A      N/A
TX  GTE        Service Order Charge Secondary - Res                          NRC       No        No        $8.00       N/A      N/A
TX  GTE        Line Connection - Bus/Res                                     NRC       No        No       $20.00       N/A      N/A
TX  GTE        Premise Visit Charge - Bus/Res                                NRC       No        No        $9.00       N/A      N/A
TX  GTE        Returned Check Charge                                         NRC       No        No       $10.00       N/A      N/A
TX  GTE        Expedited Due Date Charge                                     NRC       No        No       $20.00       N/A      N/A
               Traffic Study                                                                                                       
TX  GTE            Set Up                                                    NRC       No        No      $300.00    $40.89      N/A
TX  GTE            Line Charge, per line studied                             NRC       No        No        $3.00     $0.41      N/A
TX  GTE     9  Denial of Svc - temp denial/non pay                           NRC       No        No       $20.00       N/A      N/A
               - Line Connect $20 Chg applies                                                                                 
               Reserved Rural Facilities                                                                                      
               - Primary Service Order                                                                                        
                                                                                                      
TX  GTE    10      Business                                                  NRC      Yes        No       $31.50       N/A    $31.50
TX  GTE    10      Residence                                                 NRC       No        No       $21.00       N/A      N/A
                                                                                                      
           14  Automatic Ringdown - Signalling                                                         
TX  GTE            Monthly                                                   MRC      Yes        Yes      $10.50     $1.43     $9.07
TX  GTE            NRC                                                       NRC      Yes        No       $20.00       N/A    $20.00
                                                                                                                             
           14  DID                                                                                                            
TX  GTE            Block of 100 #'s                                          MRC      Yes        Yes     $105.00    $14.31    $90.69
</TABLE>                                                                   
<PAGE>   123




                    GTE TELEPHONE OPERATIONS HEADQUARTERS
                 RESALE PRODUCTS & SERVICES - STATE OF TEXAS
                          GTE SOUTHWEST INCORPORATED
<TABLE>
<CAPTION>
       LOCAL                                                        BILLING   RESALE     DISCOUNT      RETAIL    AVOIDED     RESALE
ST  CO TARIFF           SERVICE DESCRIPTION                           TYPE    POSITION   POSITION       RATE       COST       RATE
- --  -- -----            -------------------                         -------   --------   --------      ------    -------     ------
<S><C> <C>    <C>                                                  <C>        <C>        <C>           <C>       <C>         <C>
TX GTE            Block of 10 #'s                                   MRC         Yes          Yes       $10.50     $1.43       $9.07
                                                                                                
TX GTE    14  Busy Line Interrupt                                   NRC         Yes          No         $2.20       N/A       $2.20
TX GTE        Busy Line Verify                                      NRC         Yes          No         $1.35       N/A       $1.35
                                                                                                
          14  Dial DataLink                                                                     
TX GTE            NRC                                               NRC         Yes          No        $25.00       N/A      $25.00
TX GTE            MRC                                               MRC         Yes          Yes        $5.00     $0.68       $4.32
                                                                                                
TX GTE    14  Confer Fire Reporting - Add'l Station                 MRC         Yes          Yes        $3.50     $0.48       $3.02
                                                                                                
          14  Fire Reporting - Tellabs:                                                         
                  Common Equipment                                                              
TX GTE               Level A/ Single Payment                        NRC         Yes          No     $6,565.00       N/A   $6,565.00
TX GTE               Level A/ 5 Yr Contract                         MRC         Yes          Yes      $137.00    $18.67     $118.33
TX GTE               Level B                                        MRC         Yes          Yes       $58.25     $7.94      $50.31
TX GTE               Central Office Bridging                        NRC         Yes          No         $3.00       N/A       $3.00
                                                                                                
                  Each Add'l line                                                               
TX GTE               Level A/ Single Payment                        NRC         Yes          No       $400.00       N/A     $400.00
TX GTE               Level A/5 Yr Contract                          MRC         Yes          Yes        $8.35     $1.14       $7.21
TX GTE               Level B                                        MRC         Yes          Yes        $2.45     $0.33       $2.12
                                                                                                
                                                                                                
TX GTE    14  Personalized Telephone Number RES - Individualine     NRC         Yes          No        $25.00       N/A      $25.00
TX GTE        Personalized Telephone Number BUS - Individualine     NRC         Yes          No        $50.00       N/A      $50.00
TX GTE        Personalized Telephone Number RES - Individualine     MRC         Yes          Yes        $1.50     $0.20       $1.30
TX GTE        Personalized Telephone Number BUS - Individualine     MRC         Yes          Yes        $3.50     $0.48       $3.02
                                                                                                
TX GTE    14  Announcement Sys Service: Service Access              MRC         Yes          Yes       $30.00     $4.09      $25.91
                                                                                                
TX GTE    14  Detail Billing Svc - MRC                              MRC         Yes          Yes       $44.00     $6.00      $38.00
TX GTE        Detail Billing Svc - NRC                              NRC         Yes          No        $50.00       N/A      $50.00
                                                                                                
TX GTE    14  Special Billing #'s (Increments of 25)                MRC         Yes          Yes        $2.75     $0.37       $2.38
</TABLE>
<PAGE>   124

                    GTE TELEPHONE OPERATIONS HEADQUARTERS
                 RESALE PRODUCTS & SERVICES - STATE OF TEXAS
                          GTE SOUTHWEST INCORPORATED
<TABLE>
<CAPTION>
        LOCAL                                                     BILLING     RESALE     DISCOUNT      RETAIL    AVOIDED     RESALE
ST  CO  TARIFF             SERVICE DESCRIPTION                     TYPE      POSITION    POSITION       RATE       COST       RATE
- --  --  ------             -------------------                    -------    --------    --------      ------   --------    --------
<S> <C> <C>   <C>                                                 <C>        <C>         <C>           <C>       <C>         <C>
                                                                  
TX  GTE    14  Reserved Tel #                                      MRC        Yes          Yes           $4.40     $0.60       $3.80
                                                                  
TX  GTE        Multiple Copies of Cust Bill                        MRC         No          No            $1.00       N/A         N/A
                                                                  
           14  Call Restriction Service:                           
TX  GTE            Toll Block Option 1,2 MRC                       MRC        Yes          Yes           $1.50     $0.20       $1.30
TX  GTE                     Option 1,2 NRC                         NRC        Yes          No           $10.00       N/A      $10.00
                                                                  
TX  GTE            Billed # Screen Option 1,2,3 MRC                MRC        Yes          Yes           $2.00     $0.27       $1.73
TX  GTE                          Option 1,2,3 NRC                  NRC        Yes          No           $10.00       N/A      $10.00
                                                                  
TX  GTE            Selective Class of Call Screen - Per line       MRC        Yes          Yes           $3.00     $0.41       $2.59
TX  GTE                                        Per trunk           MRC        Yes          Yes          $10.00     $1.36       $8.64
                                                                  
TX  GTE            900 Call Restriction NRC                        NRC        Yes          No            $2.25       N/A       $2.25
                                                                  
TX  GTE    14  Rotary Busy Out MRC                                 MRC        Yes          Yes          $14.50     $1.98      $12.52
TX  GTE                        NRC                                 NRC        Yes          No           $25.00       N/A      $25.00
                                                                  
TX  GTE        Rotary Hunting                                      MRC        Yes          Yes           $3.00     $0.41       $2.59
                                                                  
TX  GTE        Circular Hunt                                       MRC        Yes          Yes           $3.25     $0.44       $2.81
                                                                  
TX  GTE    14  Tie Line Mileage Same - Bldg/Same Premises          NRC        Yes          No           $12.00       N/A      $12.00
TX  GTE        Tie Line Mileage Same - Bldg/Same Premises          MRC        Yes          Yes           $1.85     $0.25       $1.60
TX  GTE                              - Diff Premises per 1/4 MI    NRC        Yes          No           $12.00       N/A      $12.00
TX  GTE                              - Diff Premises per 1/4 MI    MRC        Yes          Yes           $1.85     $0.25       $1.60
                                                                  
TX  GTE    14  Dedicated Instant Call Accounting                   NRC        Yes          No        $2,000.00       N/A   $2,000.00
TX  GTE        Dedicated Instant Call Accounting                   MRC        Yes          Yes       $1,000.00   $136.30     $863.70
TX  GTE        Dial Up Instant Call Accounting                     NRC        Yes          No        $1,000.00       N/A   $1,000.00
TX  GTE        Dial Up Instant Call Accounting                     MRC        Yes          Yes         $550.00    $74.97     $475.04
                                                                  
TX  GTE    14  TSP - Establishment per line circuit                NRC        Yes          No           $14.50       N/A      $14.50
</TABLE>
<PAGE>   125
                    GTE TELEPHONE OPERATIONS HEADQUARTERS
                 RESALE PRODUCTS & SERVICES - STATE OF TEXAS
                          GTE SOUTHWEST INCORPORATED
<TABLE>
<CAPTION>
          LOCAL                                                         BILLING    RESALE   DISCOUNT    RETAIL    AVOIDED     RESALE
ST   CO  TARIFF                 SERVICE DESCRIPTION                       TYPE    POSITION  POSITION     RATE       COST       RATE
- --   --  ------                 -------------------                       ----    --------  --------     ----       ----       ----
<S> <C> <C>     <C>                                                     <C>      <C>        <C>     <C>         <C>       <C>
TX  GTE              Restoration Priority                               MRC        Yes        Yes       $4.90     $0.67       $4.23
          15    Bells - Ringers/OPX                               
TX  GTE           Loop Extender                                         NRC        Yes        No       $25.00       N/A      $25.00
TX  GTE           Loop Extender                                         MRC        Yes        Yes       $5.35     $0.73       $4.62
TX  GTE           Bridge Lifter                                         NRC        Yes        No        $3.00       N/A       $3.00
TX  GTE           Bridge Lifter                                         MRC        Yes        Yes       $0.40     $0.05       $0.35
TX  GTE           VF Repeater                                           NRC        Yes        No       $25.00       N/A      $25.00
TX  GTE           VF Repeater                                           MRC        Yes        Yes      $10.25     $1.40       $8.85
TX  GTE           Long Line Adapter                                     NRC        Yes        No       $25.00       N/A      $25.00
TX  GTE           Long Line Adapter                                     MRC        Yes        Yes       $8.75     $1.19       $7.56
                Bells/Ringers                                           
                  Conference Bridge                                     
TX  GTE             Common Equipment                                    MRC        Yes        Yes     $110.00    $14.99      $95.01
TX  GTE             Line Equipment                                      NRC        Yes        No       $25.00       N/A      $25.00
TX  GTE             Line Equipment                                      MRC        Yes        Yes      $10.65     $1.45       $9.20
TX  GTE           Min Termination Liability                             NRC        Yes        No    $3,500.00       N/A   $3,500.00
                                                                  
                                                                  
TX  GTE  15     Mileage Rates - Add'l each access - Per 1/4 Mile        MRC        Yes        Yes       $1.85     $0.25       $1.60
                                                                  
         16    Custom Calling Vertical Services:                  
TX  GTE         Touch Call Line Charge - BUS                            MRC        Yes        Yes       $2.00     $0.27       $1.73
TX  GTE         Touch Call Line Charge - RES                            MRC        Yes        Yes       $1.50     $0.20       $1.30
                                                                                                        
TX  GTE         Call Waiting - Business                                 MRC        Yes        Yes       $2.50     $0.34       $2.16
TX  GTE         Call Waiting - Residence                                MRC        Yes        Yes       $1.80     $0.25       $1.55
TX  GTE         Call Forwarding - Business                              MRC        Yes        Yes       $2.25     $0.31       $1.94 
TX  GTE         Call Forwarding - Residence                             MRC        Yes        Yes       $1.80     $0.25       $1.55 
TX  GTE         Call Forwarding Multipath - Business                    MRC        Yes        Yes       $2.25     $0.31       $1.94 
TX  GTE         Call Forwarding Multipath - Residence                   MRC        Yes        Yes       $1.80     $0.25       $1.55 
TX  GTE         Speed Call 8 - Business                                 MRC        Yes        Yes       $2.25     $0.31       $1.94 
TX  GTE         Speed Call 8 - Residence                                MRC        Yes        Yes       $1.80     $0.25       $1.55 
TX  GTE         Speed Call 30 - Business                                MRC        Yes        Yes       $3.60     $0.49       $3.11 
TX  GTE         Speed Call 30 - Residence                               MRC        Yes        Yes       $2.70     $0.37       $2.33 
</TABLE>
<PAGE>   126
                     GTE TELEPHONE OPERATIONS HEADQUARTERS
                  RESALE PRODUCTS & SERVICES - STATE OF TEXAS
                          GTE SOUTHWEST INCORPORATED
<TABLE>
<CAPTION>
          LOCAL                                                              BILLING     RESALE   DISCOUNT   RETAIL  AVOIDED  RESALE
ST   CO  TARIFF           SERVICE DESCRIPTION                                  TYPE     POSITION  POSITION    RATE    COST     RATE
- --   --  -----            -------------------                                  ----     --------  --------    ----    ----     ----
<S> <C> <C>     <C>                                                            <C>     <C>        <C>       <C>        <C>   <C>
TX  GTE         Three Way Calling - One Feature - Business                     MRC       Yes       Yes        $3.15     $0.43  $2.72
TX  GTE         Three Way Calling - One Feature - Residence                    MRC       Yes       Yes        $2.70     $0.37  $2.33
TX  GTE         Three Way Calling - More than One Feature - Business           MRC       Yes       Yes        $2.50     $0.34  $2.16
TX  GTE         Three Way Calling - More than One Feature - Residence          MRC       Yes       Yes        $2.05     $0.28  $1.77
TX  GTE                                                                                                                             
TX  GTE         NRC for CW,CF,CF Multipath,SC8,SC30,3WC - Bus                  NRC       Yes       No         $5.00       N/A  $5.00
TX  GTE         NRC for CW,CF,CF Multipath,SC8,SC30,3WC - Res                  NRC       Yes       No         $2.50       N/A  $2.50
                                                                                                                                    
TX  GTE         Cancel Call Waiting - Business                                 MRC       Yes       Yes        $1.80     $0.25  $1.55
TX  GTE         Cancel Call Waiting - Residence                                MRC       Yes       Yes         $.90     $0.12  $0.78
TX  GTE         Last Number Redial and Saved-Number Redial - Business          MRC       Yes       Yes        $3.15     $0.43  $2.72
TX  GTE         Last Number Redial and Saved-Number Redial - Residence         MRC       Yes       Yes        $2.70     $0.37  $2.33
TX  GTE         Call Forward/Busy/No Answer - Business (Variable)              MRC       Yes       Yes        $3.15     $0.43  $2.72
TX  GTE         Call Forward/Busy/No Answer - Residence (Variable)             MRC       Yes       Yes        $2.25     $0.31  $1.94
TX  GTE         Smart Ring - One Feature -Business                             MRC       Yes       Yes        $6.00     $0.82  $5.18
TX  GTE         Smart Ring - One Feature - Residence                           MRC       Yes       Yes        $6.00     $0.82  $5.18
TX  GTE         Smart Ring - With Package - Business                           MRC       Yes       Yes        $3.00     $0.41  $2.59
TX  GTE         Smart Ring - With Package - Residence                          MRC       Yes       Yes        $3.00     $0.41  $2.59
TX  GTE         Fixed Call Forwarding/Busy - Business                          MRC       Yes       Yes        $1.25     $0.17  $1.08
TX  GTE         Fixed Call Forwarding/Busy - Residence                         MRC       Yes       Yes        $1.25     $0.17  $1.08
TX  GTE         Fixed Call Forwarding/No Answer - Business                     MRC       Yes       Yes        $1.25     $0.17  $1.08
TX  GTE         Fixed Call Forwarding/No Answer - Residence                    MRC       Yes       Yes        $1.25     $0.17  $1.08
TX  GTE         Fixed Call Forwarding/Busy/No Answer - Business                MRC       Yes       Yes        $1.50     $0.20  $1.30
TX  GTE         Fixed Call Forwarding/Busy/No Answer - Residence               MRC       Yes       Yes        $1.50     $0.20  $1.30
TX  GTE         SMART Package - Business                                       MRC       Yes       Yes        $5.00     $0.68  $4.32
TX  GTE         SMART Package - Residence                                      MRC       Yes       Yes        $4.00     $0.55  $3.45
TX  GTE         SMARTER Package - Business                                     MRC       Yes       Yes        $6.00     $0.82  $5.18
TX  GTE         SMARTER Package - Residence                                    MRC       Yes       Yes        $5.00     $0.68  $4.32
TX  GTE         SMARTEST Package - Business                                    MRC       Yes       Yes        $7.00     $0.95  $6.05
TX  GTE         SMARTEST Package - Residence                                   MRC       Yes       Yes        $6.00     $0.82  $5.18
TX  GTE         Remote Call Forwarding - BUS/RES                               MRC       Yes       Yes       $14.50     $1.98 $12.52
                                                                                                                                    
                TEL-TEEN SERVICE CUSTOM FEATURE PACKAGES                                                                            
TX  GTE         Touch Call, Three-Way Calling, Speed Call 8, Toll Control      MRC       Yes       Yes        $3.50     $0.48  $3.02
TX  GTE         Touch Call, Call Waiting, Speed Call 8, Toll Control           MRC       Yes       Yes        $3.00     $0.41  $2.59
</TABLE>




<PAGE>   127
                    GTE TELEPHONE OPERATIONS HEADQUARTERS
                 RESALE PRODUCTS & SERVICES - STATE OF TEXAS
                          GTE SOUTHWEST INCORPORATED
<TABLE>
<CAPTION>
          LOCAL                                                         BILLING   RESALE   DISCOUNT   RETAIL AVOIDED    RESALE
ST   CO  TARIFF                 SERVICE DESCRIPTION                      TYPE    POSITION  POSITION    RATE   COST       RATE
- --   --  ------                 -------------------                      ----    --------  --------    ----   ----       ----
<S> <C> <C>     <C>                                                     <C>       <C>     <C>        <C>     <C>         <C>
TX  GTE           Touch Call, Three-Way Calling, Toll Control             MRC      Yes       Yes      $2.00   $0.27       $1.73
TX  GTE           Touch Call, Call Waiting, Speed Call 8                  MRC      Yes       Yes      $3.00   $0.41       $2.59
TX  GTE           Touch Call, Call Wait, Cancel Call Wait, 3-Way Call,    
                  Addtl List                                              MRC      Yes       Yes      $4.00   $0.55       $3.45 
TX  GTE           Touch Call, Call Wait, Cancel Call Wait,3-Way Call,                                  
                  Toll Contr, Addtl List                                  MRC      Yes       Yes      $4.00   $0.55       $3.45
                                                                                                       
          16    CLASS Vertical Services:                                                               
TX  GTE           Automatic Busy Redial - Business                        MRC      Yes       Yes      $4.00   $0.55       $3.45 
TX  GTE           Automatic Busy Redial - Residence                       MRC      Yes       Yes      $2.00   $0.27       $1.73 
TX  GTE           Automatic Call Return - Business                        MRC      Yes       Yes      $4.00   $0.55       $3.45 
TX  GTE           Automatic Call Return - Residence                       MRC      Yes       Yes      $3.00   $0.41       $2.59 
TX  GTE           Call Block - Business                                   MRC      Yes       Yes      $3.00   $0.41       $2.59 
TX  GTE           Call Block - Residence                                  MRC      Yes       Yes      $2.00   $0.27       $1.73 
TX  GTE           Special Call Acceptance - Business                      MRC      Yes       Yes      $3.00   $0.41       $2.59 
TX  GTE           Special Call Acceptance - Residence                     MRC      Yes       Yes      $2.00   $0.27       $1.73 
TX  GTE           Special Call Forwarding - Business                      MRC      Yes       Yes      $2.65   $0.36       $2.29 
TX  GTE           Special Call Forwarding - Residence                     MRC      Yes       Yes      $2.00   $0.27       $1.73 
TX  GTE           Special Call Waiting - Business                         MRC      Yes       Yes      $3.00   $0.41       $2.59 
TX  GTE           Special Call Waiting - Residence                        MRC      Yes       Yes      $2.00   $0.27       $1.73 
TX  GTE           VIP Alert - Business                                    MRC      Yes       Yes      $3.00   $0.41       $2.59 
TX  GTE           VIP Alert - Residence                                   MRC      Yes       Yes      $2.50   $0.34       $2.16 
TX  GTE           Call Tracing Service - Business                         NRC      Yes       No      $10.00     N/A      $10.00 
TX  GTE           Call Tracing Service - Residence                        NRC      Yes       No      $10.00     N/A      $10.00 
TX  GTE           Cancel Calling Number ID - Business                     MRC      Yes       Yes      $0.00               $0.00 
TX  GTE           Cancel Calling Number ID - Residence                    MRC      Yes       Yes      $0.00               $0.00 
TX  GTE           Calling Number ID - Business                            MRC      Yes       Yes      $7.50   $1.02       $6.48 
TX  GTE           Calling Number ID - Residence                           MRC      Yes       Yes      $4.95   $0.67       $4.28 
TX  GTE           Calling Number ID w/ACRJ - Business                     MRC      Yes       Yes      $7.75   $1.06       $6.69 
TX  GTE           Calling Number ID w/ACRJ - Residence                    MRC      Yes       Yes      $5.20   $0.71       $4.49 
TX  GTE           Anonymous Call Rejection (ACRJ) - Business              MRC      Yes       Yes      $1.00   $0.14       $0.86 
TX  GTE           Anonymous Call Rejection (ACRJ) - Residence             MRC      Yes       Yes      $1.00   $0.14       $0.86 
TX  GTE           SmartCall PAK 4400 - Residence                          MRC      Yes       Yes      $8.75   $1.19       $7.56 
TX  GTE           SmartCall PAK 4400 - Business                           MRC      Yes       Yes     $13.25   $1.81      $11.44 
TX  GTE           Calling Name & Number Delivery - Bus                    MRC      Yes       Yes      $9.00   $1.23       $7.77 
TX  GTE           Calling Name & Number Delivery - Res                    MRC      Yes       Yes      $6.50   $0.89       $5.61 
</TABLE>

<PAGE>   128
                    GTE TELEPHONE OPERATIONS HEADQUARTERS
                 RESALE PRODUCTS & SERVICES - STATE OF TEXAS
                          GTE SOUTHWEST INCORPORATED
<TABLE>
<CAPTION>
          LOCAL                                                      BILLING    RESALE    DISCOUNT    RETAIL     AVOIDED     RESALE
ST   CO  TARIFF               SERVICE DESCRIPTION                     TYPE     POSITION   POSITION     RATE        COST       RATE
- --   --  -----                -------------------                     ----     --------   --------     ----        ----       ----
<S> <C> <C>        <C>                                               <C>      <C>        <C>        <C>        <C>         <C>
TX  GTE   16         In Contact, per number - Bus                     MRC        Yes       Yes        $12.00      $1.64      $10.36
TX  GTE              In Contact, per number - Res                     MRC        Yes       Yes        $12.00      $1.64      $10.36
                                                                                                                                   
TX  GTE   18         Secretarial Ans Svc - Bridging                   NRC        Yes       No          $3.00        N/A       $3.00
TX  GTE              Secretarial Ans Svc - Bridging                   MRC        Yes       Yes         $7.00      $0.95       $6.05
                                                                                                                                   
TX  GTE   19         Foreign Switching Office - 1st 1/4 Mile          MRC        Yes       Yes         $2.50      $0.34       $2.16
TX  GTE                - Each add'l 1/4 MI                            MRC        Yes       Yes         $1.25      $0.17       $1.08
                                                                                                                                   
          19         Foreign Exchange                                                                                              
                       Per SWB Tariff                                                                                              
TX  GTE    2           Interexchange Mileage - Per 1/4 MI             MRC        Yes       Yes         $1.75      $0.24       $1.51
TX  GTE    2           Interexchange Channel Terminal 0 - 7 MI        MRC        Yes       Yes         $8.70      $1.19       $7.51
TX  GTE                Interexchange Channel Terminal 0 - 7+ MI       MRC        Yes       Yes        $33.15      $4.52      $28.63
TX  GTE    2           Point of Termination                           NRC        Yes       No        $174.60        N/A     $174.60
TX  GTE    2           Local Exchange Access Usage, Per Minute       Usage       Yes       Yes       $0.0210    $0.0029       $0.02
TX  GTE                  Surrogate - PBX                             Usage       Yes       Yes      $68.2080    $9.2968      $58.91
TX  GTE                  Surrogate - PBX - Business                  Usage       Yes       Yes      $21.8400    $2.9768      $18.86
TX  GTE                  Surrogate - PBX - Residence                 Usage       Yes       Yes      $14.8260    $2.0208      $12.81
                                                                                                                                   
TX  GTE   19           Four Wire Channel Terminal Equipment           NRC        Yes       No         $10.00        N/A      $10.00
TX  GTE                Four Wire Channel Terminal Equipment           MRC        Yes       Yes        $37.50      $5.11      $32.39
                                                                                                                                   
          20         Intraexchange Private Line                                                                                    
                       Grade I                                                                                                     
                         Simplex                                                                                                   
TX  GTE                    1st Mile                                   NRC        Yes       No          $7.50         N/A      $7.50
TX  GTE                    1st Mile                                   MRC        Yes       No          $9.00       $1.23      $7.77
TX  GTE                    EA add'l 1/4 MI                            MRC        Yes       No          $2.60       $0.35      $2.25
                         Duplex                                                                                                    
TX  GTE                    0 - 1/2 MI                                 NRC        Yes       No          $7.50         N/A      $7.50
TX  GTE                    0 - 1/2 MI                                 MRC        Yes       No          $7.80       $1.06      $6.74
TX  GTE                    EA add'l 1/4 MI                            MRC        Yes       No          $3.90       $0.53      $3.37
                       Grade II
                         Simplex
</TABLE>
<PAGE>   129
                    GTE TELEPHONE OPERATIONS HEADQUARTERS
                 RESALE PRODUCTS & SERVICES - STATE OF TEXAS
                          GTE SOUTHWEST INCORPORATED
<TABLE>
<CAPTION>
         LOCAL                                                         BILLING     RESALE  DISCOUNT   RETAIL    AVOIDED      RESALE
ST   CO  TARIFF               SERVICE DESCRIPTION                       TYPE     POSITION  POSITION    RATE      COST         RATE
- --   --  ------               -------------------                       ----     --------  --------    ----      ----         ----
<S> <C>  <C>  <C>                                                     <C>        <C>       <C>       <C>      <C>          <C>
TX  GTE           1st Mile                                              NRC        Yes        No       $7.50       N/A        $7.50
TX  GTE           1st Mile                                              MRC        Yes        No      $11.00     $1.50        $9.50
TX  GTE           EA add'l 1/4 MI                                       MRC        Yes        No       $2.60     $0.35        $2.25
                 Duplex                                                                                                            
TX  GTE           0 - 1/2 MI                                            NRC        Yes        No       $7.50       N/A        $7.50
TX  GTE           0 - 1/2 MI                                            MRC        Yes        No       $8.30     $1.13        $7.17
TX  GTE           EA add'l 1/4 MI                                       MRC        Yes        No       $3.90     $0.53        $3.37
               Grade III                                                                                                       
                 Simplex                                                                                                       
TX  GTE           1st Mile                                              NRC        Yes        No       $7.50       N/A        $7.50 
TX  GTE           1st Mile                                              MRC        Yes        No      $11.00     $1.50        $9.50 
TX  GTE           EA add'l 1/4 MI                                       MRC        Yes        No       $2.60     $0.35        $2.25 
                                                                                                                               
               Recorded Music and Speech Channels                                                                              
TX  GTE          0 - 4/4 MI                                             NRC        Yes        No       $7.50       N/A        $7.50
TX  GTE          0 - 4/4 MI                                             MRC        Yes        No      $12.00     $1.64       $10.36
TX  GTE          EA add'l 1/4 MI                                        MRC        Yes        No       $3.00     $0.41        $2.59
TX  GTE          Channel from Bridge Amplifier to Music cust's          NRC        Yes        No       $7.50       N/A        $7.50
TX  GTE          Channel from Bridge Amplifier to Music cust's          MRC        Yes        No       $3.00     $0.41        $2.59
                                                                                                                                   
               Bridging Amplifier installed in CO                                                                                  
TX  GTE          50 terminals                                           MRC        Yes        No      $73.50    $10.02       $63.48
TX  GTE          100 terminals                                          MRC        Yes        No      $78.25    $10.67       $67.58
TX  GTE          150 terminals                                          MRC        Yes        No      $83.25    $11.35       $71.90
TX  GTE          NRC                                                    NRC        Yes        No       $7.50       N/A        $7.50
                                                                                                                               
               Channel, remote operation of mobile - Garland/Irving                                                            
TX  GTE          Local Remote, off premise, per 1/4 MI                  MRC        Yes        No       $2.50     $0.34        $2.16 
TX  GTE          Local Remote, same premise, per 1/4 MI                 MRC        Yes        No       $2.40     $0.33        $2.07 
TX  GTE          Local Remote, same bldg., ea.                          MRC        Yes        No       $2.50     $0.34        $2.16 
TX  GTE          NRC                                                    NRC        Yes        No       $7.50       N/A        $7.50 
                                                                                                                                    
          21  Mobile Tel Service                                                                                                    
TX  GTE        Base station svc, per unit                                MRC        Yes        Yes     $13.50     $1.84      $11.66
TX  GTE         plus local exch access for B1                                                                
</TABLE>
<PAGE>   130
                      GTE TELEPHONE OPERATIONS HEADQUARTERS
                   RESALE PRODUCTS & SERVICES - STATE OF TEXAS
                          GTE SOUTHWEST INCORPORATED
                       
<TABLE>
<CAPTION>
         LOCAL                                                            BILLING  RESALE   DISCOUNT  RETAIL   AVOIDED     RESALE
ST  CO   TARIFF                SERVICE DESCRIPTION                         TYPE   POSITION  POSITION   RATE     COST       RATE
- --  --   ------                -------------------                        ------- --------  --------  ------   -------     ------
<S> <C>  <C>       <C>                                                      <C>     <C>     <C>      <C>       <C>           <C> 
TX  GTE              Local Message Charge, per minute                       Usage   Yes     Yes      $0.3500   $0.0477       $0.30

                     Measured Mobile Svc                                             
                       Local Exch access is B1 rate                                
TX  GTE                Usage, per minute                                    Usage   Yes     Yes      $0.4500   $0.0613       $0.39
TX  GTE                Roamer channel usage, per minute                     Usage   Yes     Yes      $0.8500   $0.1159       $0.73
                                                                                   
TX  GTE                                                                            

          25       Custom Routing Service                                          
                       Basic Svc Type I                                            
TX  GTE                   Svc Establishment                                  NRC    Yes     No       $150.00       N/A     $150.00
TX  GTE                   Per Line or DID # 5-50                             MRC    Yes     Yes        $3.00     $0.41       $2.59
TX  GTE                                      51-100                          MRC    Yes     Yes        $2.70     $0.37       $2.33
TX  GTE                                      101-500                         MRC    Yes     Yes        $2.40     $0.33       $2.07
TX  GTE                                      501-1000                        MRC    Yes     Yes        $2.10     $0.29       $1.81
TX  GTE                                      1001 +                          MRC    Yes     Yes        $1.75     $0.24       $1.51
TX  GTE                                      NRC                             NRC    Yes     No         $2.00       N/A       $2.00
TX  GTE                   Rearrangements, per rearrangement                  NRC    Yes     No        $72.00       N/A      $72.00
TX  GTE                                      per # changed, moved or added   NRC    Yes     No         $2.00       N/A       $2.00
                                                                                   
                       Basic Svc Type II                                           
TX  GTE                   Svc Establishment                                  NRC    Yes     No       $185.00       N/A     $185.00
TX  GTE                   Per Line or DID # 1-10                             MRC    Yes     Yes        $8.25     $1.12       $7.13
TX  GTE                                      11-50                           MRC    Yes     Yes        $8.00     $1.09       $6.91
TX  GTE                                      51-100                          MRC    Yes     Yes        $7.75     $1.06       $6.69
TX  GTE                                      101-250                         MRC    Yes     Yes        $7.50     $1.02       $6.48
TX  GTE                                      251-500                         MRC    Yes     Yes        $7.25     $0.99       $6.26
TX  GTE                                      501 +                           MRC    Yes     Yes        $7.00     $0.95       $6.05
TX  GTE                                      NRC                             NRC    Yes     No         $4.50       N/A       $4.50
TX  GTE                   Rearrangements, per rearrangement                  NRC    Yes     No        $80.00       N/A      $80.00
TX  GTE                                      per # changed, moved or added   NRC    Yes     No         $4.50       N/A       $4.50
                                                                                   
TX  GTE                Group Charges, per ea add'l group                     NRC    Yes     No        $17.00       N/A      $17.00
TX  GTE                Time of day/Day of week redirection                   NRC    Yes     No        $16.00       N/A      $16.00
</TABLE>

<PAGE>   131

                      GTE TELEPHONE OPERATIONS HEADQUARTERS
                   RESALE PRODUCTS & SERVICES - STATE OF TEXAS
                          GTE SOUTHWEST INCORPORATED
                       
<TABLE>
<CAPTION>
         LOCAL                                                            BILLING  RESALE   DISCOUNT  RETAIL   AVOIDED     RESALE
ST  CO   TARIFF                SERVICE DESCRIPTION                         TYPE   POSITION  POSITION   RATE     COST       RATE
- -- --    ------                -------------------                         ----   --------  --------   ----     ----       ----   
<S> <C>  <C>       <C>                                                      <C>     <C>     <C>      <C>       <C>         <C> 
TX  GTE                Time of day/Day of week redirection, per #            MRC    Yes     Yes        $0.40     $0.05       $0.35
TX  GTE                % redirecting                                         NRC    Yes     No        $16.00       N/A      $16.00
TX  GTE                % redirecting, per number                             MRC    Yes     Yes        $0.30     $0.04       $0.26
TX  GTE                Incoming # Identification, each 100 #'s               NRC    Yes     No        $75.00       N/A      $75.00
TX  GTE                Incoming # Identification, each #                     MRC    Yes     Yes        $0.30     $0.04       $0.26

                       Flexible Call Forwarding Svc                                
TX  GTE                   Svc Establishment                                  NRC    Yes     No       $168.00       N/A     $168.00
TX  GTE                   Per Line or DID # 5-50                             MRC    Yes     Yes        $2.00     $0.27       $1.73
TX  GTE                                      51-100                          MRC    Yes     Yes        $3.00     $0.41       $2.59
TX  GTE                                      101-500                         MRC    Yes     Yes        $2.70     $0.37       $2.33
TX  GTE                                      501-1000                        MRC    Yes     Yes        $2.40     $0.33       $2.07
TX  GTE                                      1001 +                          MRC    Yes     Yes        $1.75     $0.24       $1.51
TX  GTE                                      NRC                             NRC    Yes     No         $2.00       N/A       $2.00
TX  GTE                   Rearrangements, per rearrangement                  NRC    Yes     No        $72.00       N/A      $72.00
TX  GTE                                      per # changed,moved or added    NRC    Yes     No         $2.00       N/A       $2.00
TX  GTE                   Time of day/Day of week redirection - NRC          NRC    Yes     No        $16.00       N/A      $16.00
TX  GTE                   Time of day/Day of week redirection, per #         MRC    Yes     Yes        $0.35     $0.05       $0.30
TX  GTE                   PIN # Change                                       NRC    Yes     No        $24.00       N/A      $24.00
                                                                                   
          28       Private Page                                                    
                       Tone Only                                                   
TX  GTE                   Dispatch, per access 1-5     Month to month        MRC    Yes     Yes        $7.00     $0.95       $6.05
TX  GTE                                         6-20                         MRC    Yes     Yes        $6.80     $0.93       $5.87
TX  GTE                                         21-50                        MRC    Yes     Yes        $6.50     $0.89       $5.61
TX  GTE                                         51+                          MRC    Yes     Yes        $6.00     $0.82       $5.18
TX  GTE                                         NRC                          NRC    Yes     No         $7.50       N/A       $7.50
TX  GTE                   Dispatch, per access 1-5     12 month contract     MRC    Yes     Yes        $6.25     $0.85       $5.40
TX  GTE                                         6-20                         MRC    Yes     Yes        $5.90     $0.80       $5.10
TX  GTE                                         21-50                        MRC    Yes     Yes        $5.35     $0.73       $4.62
TX  GTE                                         51+                          MRC    Yes     Yes        $4.40     $0.60       $3.80
TX  GTE                                         NRC                          NRC    Yes     No         $7.50       N/A       $7.50
TX  GTE                   Dispatch, per access 1-5     24 Month contract     MRC    Yes     Yes        $5.50     $0.75       $4.75
TX  GTE                                         6-20                         MRC    Yes     Yes        $4.95     $0.67       $4.28
TX  GTE                                         21-50                        MRC    Yes     Yes        $4.15     $0.57       $3.58

</TABLE>

<PAGE>   132
                      GTE TELEPHONE OPERATIONS HEADQUARTERS
                   RESALE PRODUCTS & SERVICES - STATE OF TEXAS
                          GTE SOUTHWEST INCORPORATED
                       
<TABLE>
<CAPTION>
         LOCAL                                                            BILLING  RESALE   DISCOUNT  RETAIL   AVOIDED     RESALE
ST  CO   TARIFF                SERVICE DESCRIPTION                         TYPE   POSITION  POSITION   RATE     COST       RATE
- --  --   ------                -------------------                         ------ -------- ---------  ------   -------   ---------
<S> <C>  <C>       <C>                                                      <C>     <C>     <C>      <C>       <C>        <C> 
TX  GTE                                         51+                          MRC    Yes     Yes        $3.85     $0.52       $3.33
TX  GTE                                         NRC                          NRC    Yes     No         $7.50       N/A       $7.50
                       Digital Display                                             
TX  GTE                   Dispatch, per access 1-5     Month to month        MRC    Yes     Yes       $10.00     $1.36       $8.64
TX  GTE                                         6-20                         MRC    Yes     Yes        $9.65     $1.32       $8.33
TX  GTE                                         21-50                        MRC    Yes     Yes        $9.15     $1.25       $7.90
TX  GTE                                         51+                          MRC    Yes     Yes        $8.25     $1.12       $7.13
TX  GTE                                         NRC                          NRC    Yes     No         $7.50       N/A       $7.50
TX  GTE                   Dispatch, per access 1-5     12 month contract     MRC    Yes     Yes        $8.75     $1.19       $7.56
TX  GTE                                         6-20                         MRC    Yes     Yes        $8.25     $1.12       $7.13
TX  GTE                                         21-50                        MRC    Yes     Yes        $7.45     $1.02       $6.43
TX  GTE                                         51+                          MRC    Yes     Yes        $6.15     $0.84       $5.31
TX  GTE                                         NRC                          NRC    Yes     No         $7.50       N/A       $7.50
TX  GTE                   Dispatch, per access 1-5     24 Month contract     MRC    Yes     Yes        $7.50     $1.02       $6.48
TX  GTE                                         6-20                         MRC    Yes     Yes        $6.80     $0.93       $5.87
TX  GTE                                         21-50                        MRC    Yes     Yes        $5.75     $0.78       $4.97
TX  GTE                                         51+                          MRC    Yes     Yes        $4.50     $0.61       $3.89
TX  GTE                                         NRC                          NRC    Yes     No         $7.50       N/A       $7.50
                       Tone and voice                                              
TX  GTE                   Dispatch, per access 1-5     Month to month        MRC    Yes     Yes       $11.00     $1.50       $9.50
TX  GTE                                         6+                           MRC    Yes     Yes       $10.50     $1.43       $9.07
TX  GTE                                         NRC                          NRC    Yes     No         $7.50       N/A       $7.50
TX  GTE                   Dispatch, per access 1-5     12 month contract     MRC    Yes     Yes       $10.00     $1.36       $8.64
TX  GTE                                         6+                           MRC    Yes     Yes        $9.50     $1.29       $8.21
TX  GTE                                         NRC                          NRC    Yes     No         $7.50       N/A       $7.50
                                                                                   
TX  GTE   38       Directory Assistance, per call after 3 call allownace     Usage  Yes     No         $0.30       N/A       $0.30
                                                                                   
TX  GTE   38       Operator Referral                                         NRC    Yes     No        $11.20       N/A      $11.20
                                                                                   
          38       DID Intercept                                                   
TX  GTE                Option 1 - 5 lines, up to 6 months                    NRC    Yes     No       $250.00       N/A     $250.00
TX  GTE                Option 2 - 5 lines, over 6 to 12 months               NRC    Yes     No       $450.00       N/A     $450.00
</TABLE>

<PAGE>   133
                      GTE TELEPHONE OPERATIONS HEADQUARTERS
                   RESALE PRODUCTS & SERVICES - STATE OF TEXAS
                          GTE SOUTHWEST INCORPORATED
<TABLE>
<CAPTION>
         LOCAL                                                            BILLING  RESALE   DISCOUNT  RETAIL   AVOIDED     RESALE
ST  CO   TARIFF                SERVICE DESCRIPTION                         TYPE   POSITION  POSITION   RATE     COST       RATE
- --  --  -------                -------------------                        -------  -------  --------  ------   -------   ---------
<S> <C> <C>        <C>                                                      <C>     <C>     <C>     <C>       <C>         <C> 
          33       SINGLE LINE ISDN SERVICES                                       
TX  GTE             Home Digital (ISDN) Single Line Service Access Line      MRC    Yes     Yes       $39.16     $5.34      $33.82
TX  GTE            B-Voice/CSD-per line                                      MRC    Yes     Yes        $2.30     $0.31       $1.99
TX  GTE            B-Packet, per channel                                     MRC    Yes     Yes      $100.00    $13.63      $86.37
TX  GTE            D-Packet, per channel                                     MRC    Yes     Yes        $3.50     $0.48       $3.02

                    Business Digital (ISDN) Singl Line Service Access Line   MRC    Yes     Yes       $39.16     $5.34      $33.82
TX  GTE            B-Voice/CSD, per line                                     MRC    Yes     Yes        $2.30     $0.31       $1.99
TX  GTE            B-Packet, per channel                                     MRC    Yes     Yes      $100.00    $13.63      $86.37
TX  GTE            D-Packet, per channel                                     MRC    Yes     Yes        $3.50     $0.48       $3.02

                   METRO SERVICE ADDER - BUSINESS                                  
TX  GTE             (in addition to Sevice Access Line rates)                     
TX  GTE            Applicable to exchanges of Azle, Baytown, Carrollton,           
                    Crosby, Garland,                                               
TX  GTE            Grapevine, Highlands, Irving, Keller, Lewisville,               
                    Plano, Rowlette,                                               
TX  GTE            Stafford and Wylie - PER LINE                             MRC    Yes     Yes       $19.00     $2.59      $16.41
                                                                                   
TX  GTE            Applicable to exchange of Dickinson, Kemah and League           
                    City                                                     MRC    Yes     Yes        $7.00     $0.95       $6.05
                                                                                   
                   METRO SERVICE ADDER - RESIDENCE                                 
TX  GTE             (in addition to Service Access Line rates)                     
TX  GTE            Applicable to exchanges of Azle, Baytown, Carrollton,           
                    Crosby, Garland,                                               
TX  GTE            Grapevine, Highlands, Irving, Keller, Lewisville,               
                    Plano, Rowlette,                                               
TX  GTE            Stafford and Wylie - PER LINE                             MRC    Yes     Yes        $7.25     $0.00       $7.25
                                                                                   
TX  GTE            Applicable to exchange of Dickinson, Kemah and League           
                    City                                                     MRC    Yes     Yes        $3.50     $0.00       $3.50
                                                                                   
                   EXTENDED METRO SERVICE (only in exchanges where EMS is          
                   offered)  IN ADDITION TO SINGLE ACCESS AND METRO RATES          
TX  GTE                   Business                                           MRC    Yes     Yes       $20.00     $2.73      $17.27
TX  GTE                   Residence                                          MRC     No     No        $20.00       N/A         N/A
                                                                                   
          34       CentraNet                                                       
TX  GTE                Analog - Month to Month Contract - METRO EXCHANGES          
TX  GTE                   2-25 lines - per line                              MRC    Yes     Yes       $33.00     $4.50      $28.50
</TABLE>

<PAGE>   134
                      GTE TELEPHONE OPERATIONS HEADQUARTERS
                   RESALE PRODUCTS & SERVICES - STATE OF TEXAS
                          GTE SOUTHWEST INCORPORATED
                       
<TABLE>
<CAPTION>
         LOCAL                                                            BILLING  RESALE   DISCOUNT  RETAIL   AVOIDED     RESALE
ST  CO   TARIFF                SERVICE DESCRIPTION                         TYPE   POSITION  POSITION   RATE     COST       RATE
- --  --  -------                -------------------                        ------- --------  --------  -------  -------   ---------
<S> <C> <C>        <C>                                                      <C>     <C>     <C>      <C>       <C>        <C> 
TX  GTE                   26 - 50 lines - per line                           MRC    Yes     Yes       $23.50     $3.20      $20.30
                       Analog - 12 Month Contract - METRO EXCHANGES                                   $ 0.00                   N/A
TX  GTE                   2 - 25 lines - per line                            MRC    Yes     Yes       $32.25     $4.40      $27.85
TX  GTE                   26 - 50 lines - per line                           MRC    Yes     Yes       $22.75     $3.10      $19.65
TX  GTE                   51 - 100 lines - per line                          MRC    Yes     Yes       $20.50     $2.79      $17.71
TX  GTE                   101 - 200 lines - per line                         MRC    Yes     Yes       $18.75     $2.56      $16.19
TX  GTE                   201 - 400 lines - per line                         MRC    Yes     Yes       $18.50     $2.52      $15.98
                       Analog - 36 Month Contract - METRO EXCHANGES                                              $0.00         N/A
TX  GTE                   2 - 25 lines - per line                            MRC    Yes     Yes       $32.00     $4.36      $27.64
TX  GTE                   26 - 50 lines - per line                           MRC    Yes     Yes       $22.25     $3.03      $19.22
TX  GTE                   51 - 100 lines - per line                          MRC    Yes     Yes       $20.25     $2.76      $17.49
TX  GTE                   101 - 200 lines - per line                         MRC    Yes     Yes       $18.50     $2.52      $15.98
TX  GTE                   201 - 400 lines - per line                         MRC    Yes     Yes       $18.00     $2.45      $15.55
                       Analog - 60 Month Contract - METRO EXCHANGES                
TX  GTE                   2 - 25 lines - per line                            MRC    Yes     Yes       $31.75     $4.33      $27.42
TX  GTE                   26 - 50 lines - per line                           MRC    Yes     Yes       $22.00     $3.00      $19.00
TX  GTE                   51 - 100 lines - per line                          MRC    Yes     Yes       $19.75     $2.69      $17.06
TX  GTE                   101 - 200 lines - per line                         MRC    Yes     Yes       $18.25     $2.49      $15.76
TX  GTE                   201 - 400 lines - per line                         MRC    Yes     Yes       $17.50     $2.39      $15.11
                       Analog - Month to Month Contract - NONMETRO                 
                          EXCHANGES                                                
TX  GTE                   2 - 25 lines - per line                            MRC    Yes     Yes       $25.00     $3.41      $21.59
TX  GTE                   26 - 50 lines - per line                           MRC    Yes     Yes       $17.50     $2.39      $15.11
                       Analog - 12 Month Contract - NONMETRO EXCHANGES             
TX  GTE                   2 - 25 lines - per line                            MRC    Yes     Yes       $24.50     $3.34      $21.16
TX  GTE                   26 - 50 lines - per line                           MRC    Yes     Yes       $17.00     $2.32      $14.68
TX  GTE                   51 - 100 lines - per line                          MRC    Yes     Yes       $16.50     $2.25      $14.25
TX  GTE                   101 - 200 lines - per line                         MRC    Yes     Yes       $16.25     $2.21      $14.04
TX  GTE                   201 - 400 lines - per line                         MRC    Yes     Yes       $16.00     $2.18      $13.82
                       Analog - 36 Month Contract - NONMETRO EXCHANGES             
TX  GTE                   2 - 25 lines - per line                            MRC    Yes     Yes       $24.25     $3.31      $20.94
TX  GTE                   26 - 50 lines - per line                           MRC    Yes     Yes       $16.75     $2.28      $14.47
TX  GTE                   51 - 100 lines - per line                          MRC    Yes     Yes       $16.25     $2.21      $14.04
TX  GTE                   101 - 200 lines - per line                         MRC    Yes     Yes       $16.00     $2.18      $13.82
TX  GTE                   201 - 400 lines - per line                         MRC    Yes     Yes       $15.75     $2.15      $13.60
                       Analog - 60 Month Contract - NONMETRO EXHCANGE              
</TABLE>

<PAGE>   135
                      GTE TELEPHONE OPERATIONS HEADQUARTERS
                   RESALE PRODUCTS & SERVICES - STATE OF TEXAS
                          GTE SOUTHWEST INCORPORATED
                       
<TABLE>
<CAPTION>
         LOCAL                                                            BILLING  RESALE   DISCOUNT  RETAIL   AVOIDED     RESALE
ST  CO   TARIFF                SERVICE DESCRIPTION                         TYPE   POSITION  POSITION   RATE     COST       RATE
- --  --   ------                -------------------                        ------- --------  --------- ------- --------   ---------
<S> <C>  <C>       <C>                                                      <C>     <C>     <C>     <C>       <C>         <C> 
TX  GTE                   2-25 lines - per line                              MRC    Yes     Yes       $24.00     $3.27      $20.73
TX  GTE                   26-50 lines - per line                             MRC    Yes     Yes       $16.50     $2.25      $14.25
TX  GTE                   51-100 lines - per line                            MRC    Yes     Yes       $16.00     $2.18      $13.82
TX  GTE                   100-200 lines - per line                           MRC    Yes     Yes       $15.75     $2.15      $13.60
TX  GTE                   201-400 lines - per line                           MRC    Yes     Yes       $15.50     $2.11      $13.39
                   Extended Metro Service (only in exchanges where EMS is          
                     offered)                                                      
TX  GTE                2-400 Lines                                           MRC    Yes     Yes       $20.00     $2.73      $17.27

                   FEATURE PACKAGES                                                
TX  GTE                1000 Feature Package - per line                       MRC    Yes     Yes        $2.75     $0.37       $2.38
TX  GTE                2000 Feature Package - per line                       MRC    Yes     Yes        $3.00     $0.41       $2.59
TX  GTE                3000 Feature Package - per line                       MRC    Yes     Yes        $3.50     $0.48       $3.02
TX  GTE            Maximum total charge per customer                         MRC    Yes     Yes      $400.00    $54.52     $345.48
                                                                                   
                   DIGITAL CENTRANET (ISDN)                                        
                   Month to Month Contract - NON METRO RATES                       
TX  GTE                   2 - 25 lines - per line                            MRC    Yes     Yes       $43.44     $5.92      $37.52
TX  GTE                   26 - 50 lines - per line                           MRC    Yes     Yes       $31.75     $4.33      $27.42
                          12, 24 & 36 Month Contracts - NON METRO RATES            

TX  GTE                   2 - 25 lines - per month                           MRC    Yes     Yes       $43.44     $5.92      $37.52
TX  GTE                   26 - 50 lines - per month                          MRC    Yes     Yes       $31.75     $4.33      $27.42

TX  GTE                   51 - 100 lines - per month                         MRC    Yes     Yes       $31.34     $4.27      $27.07
TX  GTE                   101 - 200 lines - per month                        MRC    Yes     Yes       $31.43     $4.28      $27.15
TX  GTE                   201 - 300 lines - per month                        MRC    Yes     Yes       $31.06     $4.23      $26.83
                   EAS METRO RATES (adder to nonmetro rates in certain             
                     exchanges)                                                    
                   Month to Month Contract                                         
TX  GTE                   2 - 25 lines - per line                            MRC    Yes     Yes        $9.31     $1.27       $8.04
TX  GTE                   26 - 50 lines - per line                           MRC    Yes     Yes        $6.65     $0.91       $5.74
                          12, 24 & 36 Month Contract - EAS ADDER                   
TX  GTE                   2 - 25 lines - per line                            MRC    Yes     Yes        $9.31     $1.27       $8.04

TX  GTE                   26 - 50 lines - per line                           MRC    Yes     Yes        $6.65     $0.91       $5.74

TX  GTE                   51 - 100 lines - per line                          MRC    Yes     Yes        $4.66     $0.64       $4.02
TX  GTE                   101 - 200 lines - per line                         MRC    Yes     Yes        $3.33     $0.45       $2.88
TX  GTE                   201 - 400 lines - per line                         MRC    Yes     Yes        $3.33     $0.45       $2.88
                   Extended Metro Rates (In addition to nonmetro and EAS           
                     Metro line rates)                                             
</TABLE>

<PAGE>   136
                      GTE TELEPHONE OPERATIONS HEADQUARTERS
                   RESALE PRODUCTS & SERVICES - STATE OF TEXAS
                          GTE SOUTHWEST INCORPORATED
<TABLE>
<CAPTION>
         LOCAL                                                            BILLING  RESALE   DISCOUNT  RETAIL   AVOIDED     RESALE
ST  CO   TARIFF                SERVICE DESCRIPTION                         TYPE   POSITION  POSITION   RATE     COST       RATE
- --  --   ------                -------------------                        ------- --------  --------  ------   -------    --------
<S> <C>  <C>       <C>                                                      <C>     <C>     <C>     <C>       <C>         <C> 
                       Limited to exchanges where EMS is available                 
TX  GTE                2 - 400 lines - per line                              MRC    Yes     Yes       $20.00     $2.73      $17.27
                                                                                   
                       Data Base Additions, Changes or Deletions                   
TX  GTE                   Major Software Change                              NRC    Yes     No       $100.00       N/A     $100.00
TX  GTE                   Routine Sfotware Change                            NRC    Yes     No        $50.00       N/A      $50.00
TX  GTE                   Minor Software Change                              NRC    Yes     No        $25.00       N/A      $25.00

TX  GTE                CCLASS Feature Pkg 2-25 lines                         MRC    Yes     Yes        $5.00     $0.68       $4.32
TX  GTE                                      26-50                           MRC    Yes     Yes        $4.50     $0.61       $3.89
TX  GTE                                      51+                             MRC    Yes     Yes        $4.00     $0.55       $3.45
TX  GTE                Call Tracing, per occurance                           NRC    Yes     No        $10.00       N/A      $10.00
TX  GTE                VIP Alert                                             MRC    Yes     Yes        $4.00     $0.55       $3.45
TX  GTE            Calling Number ID (analog only) 2 - 25 lines              MRC    Yes     Yes        $6.00     $0.82       $5.18
TX  GTE                                      26-50 lines                     MRC    Yes     Yes        $4.50     $0.61       $3.89
TX  GTE                                      51+ lines                       MRC    Yes     Yes        $2.00     $0.27       $1.73
                   Maximum total charge per customer CNID                    MRC    Yes     Yes      $200.00    $27.26     $172.74
                   CENTRANET Line Connect Charges for Month to Month               
                    Contract                                                       
TX  GTE                Line Connection  2          Per line                  NRC    Yes     No        $18.00       N/A      $18.00
TX  GTE                                  3-5                                 NRC    Yes     No        $12.00       N/A      $12.00
TX  GTE                                  6-10                                NRC    Yes     No        $10.00       N/A      $10.00
TX  GTE                                  11-25                               NRC    Yes     No         $6.40       N/A       $6.40
TX  GTE                                  26-50                               NRC    Yes     No         $4.00       N/A       $4.00
TX  GTE                                  51-75                               NRC    Yes     No         $3.20       N/A       $3.20
TX  GTE                                  76-100                              NRC    Yes     No         $3.00       N/A       $3.00
TX  GTE                                  101-200                             NRC    Yes     No         $2.80       N/A       $2.80
TX  GTE                                  201-300                             NRC    Yes     No         $2.50       N/A       $2.50
TX  GTE                                  301-400                             NRC    Yes     No         $2.20       N/A       $2.20
                                                                                   
                       Optional System Features                                    
TX  GTE                   Automatic Route Selection, per hour                NRC    Yes     No        $50.00       N/A      $50.00
TX  GTE                   WATS Access                                        NRC    Yes     No        $25.00       N/A      $25.00
TX  GTE                   800 Svc Access                                     NRC    Yes     No        $25.00       N/A      $25.00
TX  GTE                   Tie Facility Access                                NRC    Yes     No        $25.00       N/A      $25.00
TX  GTE                   FX Access                                          NRC    Yes     No        $25.00       N/A      $25.00
</TABLE>


<PAGE>   137
                      GTE TELEPHONE OPERATIONS HEADQUARTERS
                   RESALE PRODUCTS & SERVICES - STATE OF TEXAS
                          GTE SOUTHWEST INCORPORATED
<TABLE>
<CAPTION>
         LOCAL                                                            BILLING  RESALE   DISCOUNT  RETAIL   AVOIDED     RESALE
ST  CO   TARIFF                SERVICE DESCRIPTION                         TYPE   POSITION  POSITION   RATE     COST       RATE
- --  --  -------                -------------------                        ------- --------- -------- -------- --------    --------
<S> <C> <C>        <C>                                                      <C>     <C>     <C>     <C>       <C>         <C> 
TX  GTE                   Limited Auto Call Distribution                     NRC    Yes     No        $25.00       N/A      $25.00
TX  GTE                   Preferential Hunting                               NRC    Yes     No        $25.00       N/A      $25.00
TX  GTE                   Stop Hunt                                          NRC    Yes     No        $25.00       N/A      $25.00
TX  GTE                   Priority Queing                                    NRC    Yes     No        $25.00       N/A      $25.00
TX  GTE                   Authorization Codes, per group of 10               NRC    Yes     No        $25.00       N/A      $25.00
TX  GTE                   Terminal Make Busy                                 NRC    Yes     No        $25.00       N/A      $25.00
TX  GTE                   EMS - Simulated Facility Group                     MRC    Yes     Yes        $5.00     $0.68       $4.32
TX  GTE                   EMS - Simulated Facility Group                     NRC    Yes     No        $25.00       N/A      $25.00
TX  GTE                   Paging/Public Access                               MRC    Yes     Yes       $30.00     $4.09      $25.91
TX  GTE                   Paging/Public Access                               NRC    Yes     No       $140.00       N/A     $140.00
TX  GTE                   Dictation Access                                   MRC    Yes     Yes       $30.00     $4.09      $25.91
TX  GTE                   Dictation Access                                   NRC    Yes     No       $140.00       N/A     $140.00
TX  GTE                   Code Calling Access                                MRC    Yes     Yes       $30.00     $4.09      $25.91
TX  GTE                   Code Calling Access                                NRC    Yes     No       $140.00       N/A     $140.00
TX  GTE                   Music On Hold                                      MRC    Yes     Yes       $10.00     $1.36       $8.64
TX  GTE                   Music On Hold                                      NRC    Yes     No        $50.00       N/A      $50.00
TX  GTE                   Recorded Announcement Custom                       MRC    Yes     Yes       $45.00     $6.13      $38.87
TX  GTE                   Recorded Announcement Custom                       NRC    Yes     No       $260.00       N/A     $260.00
TX  GTE                   Conference Call 8 Port                             MRC    Yes     Yes      $110.00    $14.99      $95.01
TX  GTE                   Conference Call 8 Port                             NRC    Yes     No       $160.00       N/A     $160.00
TX  GTE                   SMDR VIA Rev Acctg Office, per line                MRC    Yes     Yes        $0.30     $0.04       $0.26
TX  GTE            Addl Number - Analog                                      MRC    Yes     Yes        $2.00     $0.27       $1.73
TX  GTE            Addl Number - Digital                                     MRC    Yes     Yes        $2.00     $0.27       $1.73
TX  GTE            Feature Phone Interface                                   MRC    Yes     Yes        $5.00     $0.68       $4.32
                                                                                   
                       Optional Attendant Features                                 
TX  GTE                   Data Link Console Interface                        MRC    Yes     Yes       $90.00    $12.27      $77.73
TX  GTE                   Data Link Console Interface                        NRC    Yes     No       $210.00       N/A     $210.00
TX  GTE                   Multiple Listed Directory Number                   NRC    Yes     No        $25.00       N/A      $25.00
TX  GTE                   Pre Determined Night Number                        NRC    Yes     No        $25.00       N/A      $25.00
TX  GTE                   Universal Night Answer                             MRC    Yes     Yes       $10.00     $1.36       $8.64
TX  GTE                   Universal Night Answer                             NRC    Yes     No        $65.00       N/A      $65.00
TX  GTE                   Mixed Night Answer                                 MRC    Yes     Yes       $10.00     $1.36       $8.64
TX  GTE                   Mixed Night Answer                                 NRC    Yes     No        $65.00       N/A      $65.00
TX  GTE                   Additional Console Member                          MRC    Yes     Yes       $90.00    $12.27      $77.73
</TABLE>


<PAGE>   138
                      GTE TELEPHONE OPERATIONS HEADQUARTERS
                   RESALE PRODUCTS & SERVICES - STATE OF TEXAS
                          GTE SOUTHWEST INCORPORATED
<TABLE>
<CAPTION>
         LOCAL                                                            BILLING  RESALE   DISCOUNT  RETAIL   AVOIDED     RESALE
ST  CO   TARIFF                SERVICE DESCRIPTION                         TYPE   POSITION  POSITION   RATE     COST       RATE
- --  --  -------                -------------------                        ------- --------- --------  ------   -------    --------
<S> <C> <C>        <C>                                                      <C>     <C>     <C>      <C>       <C>        <C> 
TX  GTE                   Additional Console Member                          NRC    Yes     No       $185.00       N/A     $185.00
TX  GTE                   Flexible Night Answer                              MRC    Yes     Yes       $10.00     $1.36       $8.64
TX  GTE                   Flexible Night Answer                              NRC    Yes     No        $65.00       N/A      $65.00
TX  GTE            DIGITAL (ISDN) CENTRANET                                        
TX  GTE            B Channels - per line                                           
TX  GTE                Voice Only                                            MRC    Yes     Yes        $2.12     $0.29       $1.83
TX  GTE                Voice/Circuit                                         MRC    Yes     Yes       $12.09     $1.65      $10.44
TX  GTE                Switched Data                                         NRC    Yes     No       $100.00       N/A     $100.00
TX  GTE                                                                            
TX  GTE            D Channel - Per Channel                                                                                     N/A
TX  GTE                D Packet                                              MRC    Yes     Yes        $3.50     $0.48       $3.02
                                                                                   
TX  GTE            Additional Directory Listings                             MRC    Yes     Yes        $1.10     $0.15       $0.95
TX  GTE            ISDN Multibutton Key System (MBKS)                              
TX  GTE                   Basic                                              MRC    Yes     Yes        $6.50     $0.89       $5.61
TX  GTE                   Deluxe                                             MRC    Yes     Yes        $8.50     $1.16       $7.34
TX  GTE            ISDN Attendant Features                                   MRC    Yes     Yes       $35.00     $4.77      $30.23
TX  GTE            Data Feature Packages                                           
TX  GTE            X.25 Enhanced Package                                     MRC    Yes     Yes        $5.00     $0.68       $4.32
TX  GTE            Circuit Switched Data - 1000 Pkg                          MRC    Yes     Yes        $3.00     $0.41       $2.59
TX  GTE            Circuit Switched Data-2000 Pkg                            MRC    Yes     Yes        $5.00     $0.68       $4.32
TX  GTE            Data Closed User Group                                    MRC    Yes     Yes        $1.00     $0.14       $0.86
TX  GTE            Data Direct connect                                       MRC    Yes     Yes        $1.00     $0.14       $0.86

TX  GTE            ISDN Foreign Exchange Facility                            MRC    Yes     Yes       $72.19     $9.84      $62.35
TX  GTE            plus Interexchange Mileage- per mile                      MRC    Yes     Yes        $1.75     $0.24       $1.51
                                                                                   
TX  GTE   34B          Customer Moves & Changes 2-100, Per system            MRC    Yes     Yes      $125.00    $17.04     $107.96
TX  GTE                Customer Moves & Changes 2-100, Per system            NRC    Yes     No       $150.00       N/A     $150.00
TX  GTE                                            101-200                   MRC    Yes     Yes      $165.00    $22.49     $142.51
TX  GTE                                            101-200                   NRC    Yes     No       $350.00       N/A     $350.00
TX  GTE                                            201-500                   MRC    Yes     Yes      $200.00    $27.26     $172.74
TX  GTE                                            201-500                   NRC    Yes     No       $700.00       N/A     $700.00
TX  GTE                                            501-1500                  MRC    Yes     Yes      $300.00    $40.89     $259.11
</TABLE>

<PAGE>   139
                      GTE TELEPHONE OPERATIONS HEADQUARTERS
                   RESALE PRODUCTS & SERVICES - STATE OF TEXAS
                          GTE SOUTHWEST INCORPORATED
<TABLE>
<CAPTION>
         LOCAL                                                            BILLING  RESALE   DISCOUNT  RETAIL   AVOIDED     RESALE
ST  CO   TARIFF                SERVICE DESCRIPTION                         TYPE   POSITION  POSITION   RATE     COST       RATE
- --  --  -------                -------------------                        ------- --------  --------  ------  -------    ---------
<S> <C> <C>        <C>                                                      <C>     <C>     <C>    <C>        <C>        <C> 
TX  GTE                                            501-1500                  NRC    Yes     No     $1,850.00       N/A   $1,850.00
TX  GTE                                            1500 +                    MRC    Yes     Yes      $425.00    $57.93     $367.07
TX  GTE                                            1500 +                    NRC    Yes     No     $3,500.00       N/A   $3,500.00
                                                                                   
          34C      Analog CentraNet Automatic Call Distribution/Mgt Info           
                    System                                                         
TX  GTE                Basic Agent Feature Package, per ACD group            NRC    Yes     No        $50.00       N/A      $50.00
TX  GTE                Basic Agent Feature Package, per ACD line             MRC    Yes     Yes       $28.00     $3.82      $24.18
TX  GTE                Advanced Agent Feature Package, per ACD group         NRC    Yes     No        $25.00       N/A      $25.00
TX  GTE                Advanced Agent Feature Package, per ACD line          MRC    Yes     Yes        $5.00     $0.68       $4.32
TX  GTE                ACD on single line sets, per ACD line                 NRC    Yes     No        $10.00       N/A      $10.00
TX  GTE                ACD on single line sets, per ACD line                 MRC    Yes     Yes       $22.50     $3.07      $19.43
TX  GTE                Supervisor Feature Package, per ACD line              NRC    Yes     No        $10.00     $1.36       $8.64
TX  GTE                Supervisor Feature Package, per ACD line              MRC    Yes     Yes       $30.00     $4.09      $25.91
TX  GTE                Secondary Directory number                            MRC    Yes     Yes        $6.00     $0.82       $5.18
TX  GTE                MIS Data Stream Interface, per interface              NRC    Yes     No       $100.00       N/A     $100.00
TX  GTE                MIS Data Stream Interface, per interface              MRC    Yes     Yes      $100.00    $13.63      $86.37
TX  GTE                Additional Queue Slots, per system                    NRC    Yes     No        $25.00       N/A      $25.00
TX  GTE                Additional Queue Slots, per slot                      MRC    Yes     Yes        $2.50     $0.34       $2.16
TX  GTE                Supergroups                                           NRC    Yes     No        $50.00       N/A      $50.00
TX  GTE                Supergroups                                           MRC    Yes     Yes       $25.00     $3.41      $21.59
TX  GTE                Mileage Charge, per loop for each ACD line, per             
                        1/4 MI                                               MRC    Yes     Yes        $1.16     $0.16       $1.00
                                                                                   
                   DIGITAL ACD / MIS                                               
                       Basic ACD and Feature Package                               
TX  GTE                   Per ACD Group-NonMetro                             NRC    Yes     No        $55.00       N/A      $55.00
TX  GTE                   Per ACD Group-Metro                                NRC    Yes     No        $55.00       N/A      $55.00
TX  GTE                   Per Non-Metro ACD Line                             MRC    Yes     Yes       $24.50     $3.34      $21.16
TX  GTE                   Per Metro ACD Line                                 MRC    Yes     Yes       $28.00     $3.82      $24.18
TX  GTE                   MI per local loop (line), per 1/4 MI               MRC    Yes     Yes        $1.16     $0.16       $1.00
                                                                                   
                   Multipoint ACD                                                  
TX  GTE                   Per ACD Group-NonMetro                             NRC    Yes     No        $55.00       N/A      $55.00
TX  GTE                   Per ACD Group-Metro                                NRC    Yes     No        $55.00       N/A      $55.00
TX  GTE                   Per Non-Metro ACD Line                             MRC    Yes     Yes       $36.75     $5.01      $31.74
</TABLE>

<PAGE>   140
                      GTE TELEPHONE OPERATIONS HEADQUARTERS
                   RESALE PRODUCTS & SERVICES - STATE OF TEXAS
                          GTE SOUTHWEST INCORPORATED
<TABLE>
<CAPTION>
         LOCAL                                                            BILLING  RESALE   DISCOUNT  RETAIL   AVOIDED     RESALE
ST  CO   TARIFF                SERVICE DESCRIPTION                         TYPE   POSITION  POSITION   RATE     COST       RATE
- --  --   ------                -------------------                        ------- --------  --------  -------  --------   --------
<S> <C>  <C>       <C>                                                      <C>     <C>     <C>     <C>       <C>         <C> 
TX  GTE                   Per Metro ACD Line                                 MRC    Yes     Yes       $42.00     $5.72      $36.28

                      Additional Queue Slots                                      
TX  GTE                   Per System                                         NRC    Yes     No        $25.00       N/A      $25.00
TX  GTE                   Per Slot                                           MRC    Yes     Yes        $2.50     $0.34       $2.16
                                                                                   
TX  GTE                Call Prompts, per step                                NRC    Yes     No       $100.00       N/A     $100.00
TX  GTE                Call Prompts, per step                                MRC    Yes     Yes      $150.00    $20.45     $129.56
                                                                                   
                       Call Vectoring                                              
TX  GTE                   Per ACD Group                                      NRC    Yes     No        $40.00       N/A      $40.00
TX  GTE                   Per ACD Line                                       MRC    Yes     Yes        $6.00     $0.82       $5.18
                                                                                   
TX  GTE                Direct Agent Access, per access number                MRC    Yes     Yes        $2.00     $0.27       $1.73
                                                                                   
TX  GTE                MIS Data Link, per link                               NRC    Yes     No        $25.00       N/A      $25.00
TX  GTE                MIS Data Link, per link                               MRC    Yes     Yes       $80.00    $10.90      $69.10
                                                                                   
          39       Coin Telephones / Customer Owned Pay Telephone Service          
TX  GTE                COPT                                                  MRC    Yes     No        $22.10       N/A      $22.10
TX  GTE                COPT usage rate per call                             USAGE   Yes     No       $0.0270       N/A       $0.03
TX  GTE                Surogate                                              MRC    Yes     No        $11.50       N/A      $11.50
TX  GTE                Selective Class of Call Screening                     MRC    Yes     No         $3.00       N/A       $3.00
TX  GTE                Direct Dialed International Call Blocking             NRC    Yes     No        $10.00       N/A      $10.00
TX  GTE                Answer Supervision                                    MRC    Yes     No         $7.60       N/A       $7.60
TX  GTE                Coin Line                                             MRC    Yes     No        $29.70       N/A      $29.70
                                                                                   
TX  GTE            9-1-1 / E9-1-1 Services                                         
TX  GTE                9-1-1 Special Trunk                                   NRC    Yes     No        $89.29       N/A      $89.29
TX  GTE                9-1-1 Special Trunk                                   MRC    Yes     Yes       $15.51     $2.11      $13.40
                                                                                   
          34A      MultiLocation CentraNet Service                                 
                       Location Code Dialing Plan/Portable Extension Dial          
                        Plan                                                       
TX  GTE                   Service Establishment 2-25 lines                   NRC    Yes     No       $125.00       N/A     $125.00
TX  GTE                                         26-50 lines                  NRC    Yes     No       $160.00       N/A     $160.00
</TABLE>

<PAGE>   141
                      GTE TELEPHONE OPERATIONS HEADQUARTERS
                   RESALE PRODUCTS & SERVICES - STATE OF TEXAS
                          GTE SOUTHWEST INCORPORATED
                       
<TABLE>
<CAPTION>
         LOCAL                                                            BILLING  RESALE   DISCOUNT  RETAIL   AVOIDED     RESALE
ST  CO   TARIFF                SERVICE DESCRIPTION                         TYPE   POSITION  POSITION   RATE     COST       RATE
- --  --   -----                 -------------------                         ----   --------  --------   ----     ----       ----
<S> <C>  <C>       <C>                                                      <C>     <C>     <C>      <C>       <C>        <C> 
TX  GTE                                         51-100 lines                 NRC    Yes     No       $190.00       N/A     $190.00
TX  GTE                                         101-200 lines                NRC    Yes     No       $220.00       N/A     $220.00
TX  GTE                                         201-400 lines                NRC    Yes     No       $275.00       N/A     $275.00
                                                                                   
TX  GTE                Month to Month contract 2-25 lines                    MRC    Yes     Yes       $25.00     $3.41      $21.59
TX  GTE                                         26-50 lines                  MRC    Yes     Yes       $35.00     $4.77      $30.23
                                                                                   
TX  GTE                12 month contract  2-25 lines                         MRC    Yes     Yes       $20.00     $2.73      $17.27
TX  GTE                                   26-50 lines                        MRC    Yes     Yes       $30.00     $4.09      $25.91
TX  GTE                                   51-100 lines                       MRC    Yes     Yes       $50.00     $6.82      $43.19
TX  GTE                                   101-200 lines                      MRC    Yes     Yes       $75.00    $10.22      $64.78
TX  GTE                                   201-400 lines                      MRC    Yes     Yes      $130.00    $17.72     $112.28
                                                                                   
TX  GTE                36 month contract  2-25 lines                         MRC    Yes     Yes       $15.00     $2.04      $12.96
TX  GTE                                   26-50 lines                        MRC    Yes     Yes       $25.00     $3.41      $21.59
TX  GTE                                   51-100 lines                       MRC    Yes     Yes       $45.00     $6.13      $38.87
TX  GTE                                   101-200 lines                      MRC    Yes     Yes       $70.00     $9.54      $60.46
TX  GTE                                   201-400 lines                      MRC    Yes     Yes      $125.00    $17.04     $107.96
                                                                                   
TX  GTE                60 month contract  51-100 lines                       MRC    Yes     Yes       $40.00     $5.45      $34.55
TX  GTE                                   101-200 lines                      MRC    Yes     Yes       $65.00     $8.86      $56.14
TX  GTE                                   201-400 lines                      MRC    Yes     Yes      $120.00    $16.36     $103.64
                                                                                   
TX  GTE                Additions or changes, per location                    NRC    Yes     No        $60.00       N/A      $60.00
                                                                                   
TX  GTE                Addition or change to dialing plan, 1st 25 numbers    NRC    Yes     No        $50.00       N/A      $50.00
TX  GTE                                                    Ea Add'l number   NRC    Yes     No         $1.00       N/A       $1.00
                                                                                   
                   Intercom Calling                                                
TX  GTE                Month to Month contract 2-25 lines, per line          MRC    Yes     Yes        $3.00     $0.41       $2.59
TX  GTE                                         26-50 lines, per line        MRC    Yes     Yes        $2.75     $0.37       $2.38
                                                                                   
TX  GTE                12 month contract  2-25 lines, per line               MRC    Yes     Yes        $2.75     $0.37       $2.38
TX  GTE                                   26-50 lines, per line              MRC    Yes     Yes        $2.50     $0.34       $2.16
TX  GTE                                   51-100 lines, per line             MRC    Yes     Yes        $2.25     $0.31       $1.94
</TABLE>

<PAGE>   142
                      GTE TELEPHONE OPERATIONS HEADQUARTERS
                   RESALE PRODUCTS & SERVICES - STATE OF TEXAS
                          GTE SOUTHWEST INCORPORATED
                       
<TABLE>
<CAPTION>
         LOCAL                                                            BILLING  RESALE   DISCOUNT  RETAIL   AVOIDED     RESALE
ST  CO   TARIFF                SERVICE DESCRIPTION                         TYPE   POSITION  POSITION   RATE     COST       RATE
- --  --   ------                -------------------                         ----   --------  --------   ----     ----       ----
<S> <C>  <C>       <C>                                                      <C>     <C>     <C>      <C>       <C>         <C> 
TX  GTE                                   101-200 lines, per line            MRC    Yes     Yes        $2.00     $0.27       $1.73
TX  GTE                                   201-400 lines, per line            MRC    Yes     Yes        $1.75     $0.24       $1.51
                                                                                   
TX  GTE                36 month contract  2-25 lines, per line               MRC    Yes     Yes        $2.50     $0.34       $2.16
TX  GTE                                   26-50 lines, per line              MRC    Yes     Yes        $2.25     $0.31       $1.94
TX  GTE                                   51-100 lines, per line             MRC    Yes     Yes        $2.00     $0.27       $1.73
TX  GTE                                   101-200 lines, per line            MRC    Yes     Yes        $1.75     $0.24       $1.51
TX  GTE                                   201-400 lines, per line            MRC    Yes     Yes        $1.50     $0.20       $1.30
                                                                                   
TX  GTE                60 month contract  51-100 lines, per line             MRC    Yes     Yes        $1.75     $0.24       $1.51
TX  GTE                                    101-200 lines, per line           MRC    Yes     Yes        $1.50     $0.20       $1.30
TX  GTE                                    201-400 lines, per line           MRC    Yes     Yes        $1.25     $0.17       $1.08
                                                                                   
          34A      Portable Extension Dialing Plan                                 
                   Service Establishment (Per Business Group)                      
TX  GTE                                   2-25 lines, per line               NRC    Yes     No       $125.00       N/A     $125.00
TX  GTE                                   26-50 lines, per line              NRC    Yes     No       $160.00       N/A     $160.00
TX  GTE                                   51-100 lines, per line             NRC    Yes     No       $190.00       N/A     $190.00
TX  GTE                                   101-200 lines, per line            NRC    Yes     No       $220.00       N/A     $220.00
TX  GTE                                   201-400 lines, per line            NRC    Yes     No       $275.00       N/A     $275.00
                                                                                   
TX  GTE                Month to Month contract 2-25 lines, per line          MRC    Yes     Yes       $25.00     $3.41      $21.59
TX  GTE                                         26-50 lines, per line        MRC    Yes     Yes       $35.00     $4.77      $30.23
                                                                                   
TX  GTE                12 month contract  2-25 lines, per line               MRC    Yes     Yes       $20.00     $2.73      $17.27
TX  GTE                                   26-50 lines, per line              MRC    Yes     Yes       $30.00     $4.09      $25.91
TX  GTE                                   51-100 lines, per line             MRC    Yes     Yes       $50.00     $6.82      $43.19
TX  GTE                                   101-200 lines, per line            MRC    Yes     Yes       $75.00    $10.22      $64.78
TX  GTE                                   201-400 lines, per line            MRC    Yes     Yes      $130.00    $17.72     $112.28
                                                                                   
TX  GTE                36 month contract  2-25 lines, per line               MRC    Yes     Yes       $15.00     $2.04      $12.96
TX  GTE                                   26-50 lines, per line              MRC    Yes     Yes       $25.00     $3.41      $21.59
TX  GTE                                   51-100 lines, per line             MRC    Yes     Yes       $45.00     $6.13      $38.87
TX  GTE                                   101-200 lines, per line            MRC    Yes     Yes       $70.00     $9.54      $60.46
TX  GTE                                   201-400 lines, per line            MRC    Yes     Yes      $125.00    $17.04     $107.96
</TABLE>

<PAGE>   143
                      GTE TELEPHONE OPERATIONS HEADQUARTERS
                   RESALE PRODUCTS & SERVICES - STATE OF TEXAS
                          GTE SOUTHWEST INCORPORATED
                       
<TABLE>
<CAPTION>
         LOCAL                                                            BILLING  RESALE   DISCOUNT  RETAIL   AVOIDED     RESALE
ST  CO   TARIFF                SERVICE DESCRIPTION                         TYPE   POSITION  POSITION   RATE     COST       RATE
- --  --   ------                -------------------                         ----   --------  --------   ----     ----       ----
<S> <C>  <C>       <C>                                                      <C>     <C>     <C>     <C>       <C>         <C> 
TX  GTE                60 month contract  51-100 lines                       MRC    Yes     Yes       $40.00     $5.45      $34.55
TX  GTE                                    101-200 lines                     MRC    Yes     Yes       $65.00     $8.86      $56.14
TX  GTE                                    201-400 lines                     MRC    Yes     Yes      $120.00    $16.36     $103.64
                                                                                   
TX  GTE                Additions or changes, per location                    NRC    Yes     No        $60.00       N/A      $60.00
                                                                                   
TX  GTE                Additions or change to dialing plan, 1st 25 numbers   NRC    Yes     No        $50.00       N/A      $50.00
TX  GTE                                                    Ea add'l number   NRC    Yes     No         $1.00       N/A       $1.00
                                                                                   
                       Basic ACD and Feature Package                               
TX  GTE                   Per ACD Group-NonMetro                             NRC    Yes     No        $55.00       N/A      $55.00
TX  GTE                   Per ACD Group-Metro                                NRC    Yes     No        $55.00     $7.50      $47.50
TX  GTE                   Per Non-Metro ACD Line                             MRC    Yes     Yes       $24.50     $3.34      $21.16
TX  GTE                   Per Metro ACD Line                                 MRC    Yes     Yes       $28.00     $3.82      $24.18
TX  GTE                   MI per local loop (line), per 1/4 MI               MRC    Yes     Yes        $1.16     $0.16       $1.00

                       Multipoint ACD                                              
TX  GTE                   Per ACD Group-NonMetro                             NRC    Yes     No        $55.00       N/A      $55.00
TX  GTE                   Per ACD Group-Metro                                NRC    Yes     No        $55.00       N/A      $55.00
TX  GTE                   Per Non-Metro ACD Line                             MRC    Yes     Yes       $36.75     $5.01      $31.74
TX  GTE                   Per Metro ACD Line                                 MRC    Yes     Yes       $42.00     $5.72      $36.28

                       Additional Queue Slots                                      
TX  GTE                   Per System                                         NRC    Yes     No        $25.00       N/A      $25.00
TX  GTE                   Per Slot                                           MRC    Yes     Yes        $2.50     $0.34       $2.16
                                                                                   
TX  GTE                Call Prompts, per step                                NRC    Yes     No       $100.00       N/A     $100.00
TX  GTE                Call Prompts, per step                                MRC    Yes     Yes      $150.00    $20.45     $129.56
                                                                                   
                       Call Vectoring                                              
TX  GTE                   Per ACD Group                                      NRC    Yes     No        $40.00       N/A      $40.00
TX  GTE                   Per ACD Line                                       MRC    Yes     Yes        $6.00     $0.82       $5.18
                                                                                   
TX  GTE                Direct Agent Access, per access number                MRC    Yes     Yes        $2.00     $0.27       $1.73
</TABLE>

<PAGE>   144
                      GTE TELEPHONE OPERATIONS HEADQUARTERS
                   RESALE PRODUCTS & SERVICES - STATE OF TEXAS
                          GTE SOUTHWEST INCORPORATED
                       
<TABLE>
<CAPTION>
         LOCAL                                                            BILLING  RESALE   DISCOUNT  RETAIL   AVOIDED     RESALE
ST  CO   TARIFF                SERVICE DESCRIPTION                         TYPE   POSITION  POSITION   RATE     COST       RATE
- --  --   ------                -------------------                         ----   --------  --------   ----     ----       ----
<S> <C>  <C>   <C>                                                          <C>     <C>     <C>      <C>       <C>        <C> 
TX  GTE                MIS Data Link, per link                               NRC    Yes     No        $25.00       N/A      $25.00
TX  GTE                MIS Data Link, per link                               MRC    Yes     Yes       $80.00    $10.90      $69.10
                                                                                   
          49       ISDN Primary Rate Interface                                     

TX  GTE                PRI Access, per PRI Access A                          MRC    Yes     Yes      $350.00    $47.71     $302.30
TX  GTE                PRI Access, per PRI Access B                          MRC    Yes     Yes      $290.00    $39.53     $250.47

TX  GTE                PRI Facility                                          NRC    Yes     No       $300.00       N/A     $300.00
TX  GTE                PRI Facility                                          MRC    Yes     Yes      $200.00    $27.26     $172.74

                       B Channel Trunks                                            
TX  GTE                   DID/DOD                                            MRC    Yes     Yes       $13.50     $1.84      $11.66
TX  GTE                   Usage Rates, per minute                           Usage   Yes     Yes        $0.03     $0.00       $0.03
TX  GTE                   OutWATS/800                                        MRC    Yes     Yes       $22.00     $3.00      $19.00
TX  GTE                   ISDN Interoffice TIE                               MRC    Yes     Yes        $1.00     $0.14       $0.86
TX  GTE                   Intermediary Customer Svcs                         MRC    Yes     Yes       $21.50     $2.93      $18.57
                                                                                   
                       Optional Features                                           
TX  GTE                   Universal Call by Call Trunk                       MRC    Yes     Yes       $22.50     $3.07      $19.43
TX  GTE                   D Channell Back up                                 MRC    Yes     Yes      $200.00    $27.26     $172.74
                                                                                   
                       B Channel Database  Configuration                           
TX  GTE                   PRI Access, per A and/or B                         NRC    Yes     No        $65.00       N/A      $65.00
TX  GTE                   B Channel, per type                                NRC    Yes     No       $125.00       N/A     $125.00
TX  GTE                   D Channel back up                                  NRC    Yes     No        $65.00       N/A      $65.00
                                                                                   
          49   Controlink Digital Channel Service (CDCS)                           
                   Service Ordering Charges                                        
TX  GTE                Service Establishment Charge, per CDCS                NRC    Yes     No       $300.00       N/A     $300.00
TX  GTE                Service Change Charge, Per CDCS                       NRC    Yes     No       $115.00       N/A     $115.00
                                                                                   
                   Digital Channel Capacity - 36 Month Term                        
TX  GTE                24 Channels                                           MRC    Yes     Yes      $340.00    $46.34     $293.66
                                                                                   
</TABLE>
<PAGE>   145
                      GTE TELEPHONE OPERATIONS HEADQUARTERS
                 RESALE PRODUCTS & SERVICES - STATE OF TEXAS
                          GTE SOUTHWEST INCORPORATED
                       
<TABLE>
<CAPTION>
         LOCAL                                                     BILLING   RESALE   DISCOUNT      RETAIL      AVOIDED     RESALE
ST  CO   TARIFF                SERVICE DESCRIPTION                   TYPE   POSITION  POSITION       RATE        COST        RATE
- --  --   ------                -------------------                   ----   --------  --------       ----        ----        ----
<S> <C>  <C>     <C>                                                <C>      <C>     <C>          <C>          <C>        <C> 
TX  GTE                    24 Channels                               NRC      Yes         No          $250.00       N/A     $250.00
TX  GTE                    48 Channels                               MRC      Yes         Yes         $540.00    $73.60     $466.40
TX  GTE                    48 Channels                               NRC      Yes         No          $500.00       N/A     $500.00
TX  GTE                    72 Channels                               MRC      Yes         Yes         $740.00   $100.86     $639.14
TX  GTE                    72 Channels                               NRC      Yes         No          $750.00       N/A     $750.00
TX  GTE                    96 Channels                               MRC      Yes         Yes         $940.00   $128.12     $811.88
TX  GTE                    96 Channels                               NRC      Yes         No        $1,000.00       N/A   $1,000.00
TX  GTE                    120 Channels                              MRC      Yes         Yes       $1,140.00   $155.38     $984.62
TX  GTE                    120 Channels                              NRC      Yes         No        $1,250.00       N/A   $1,250.00
TX  GTE                    144 Channels                              MRC      Yes         Yes       $1,340.00   $182.64   $1,157.36
TX  GTE                    144 Channels                              NRC      Yes         No        $1,500.00       N/A   $1,500.00
TX  GTE                    192 Channels                              MRC      Yes         Yes       $1,740.00   $237.16   $1,502.84
TX  GTE                    192 Channels                              NRC      Yes         No        $2,000.00       N/A   $2,000.00
TX  GTE                    240 Channels                              MRC      Yes         Yes       $2,140.00   $291.68   $1,848.32
TX  GTE                    240 Channels                              NRC      Yes         No        $2,500.00       N/A   $2,500.00
TX  GTE                    672 Channels                              MRC      Yes         Yes       $4,950.00   $674.69   $4,275.32
TX  GTE                    672 Channels                              NRC      Yes         No        $7,000.00       N/A   $7,000.00
TX  GTE                    For increments not identified above,                         
                             24 channels                             MRC      Yes         Yes         $200.00    $27.26     $172.74
TX  GTE                    For increments not identified above,                         
                             24 channels                             NRC      Yes         No          $250.00       N/A     $250.00
                                                                                        
                       Digital Channel Capacity-60 Month Term                          
TX  GTE                    24 Channels                               MRC      Yes         Yes         $320.00    $43.62     $276.38
TX  GTE                    24 Channels                               NRC      Yes         No          $250.00       N/A     $250.00
TX  GTE                    48 Channels                               MRC      Yes         Yes         $510.00    $69.51     $440.49
TX  GTE                    48 Channels                               NRC      Yes         No          $500.00       N/A     $500.00
TX  GTE                    72 Channels                               MRC      Yes         Yes         $700.00    $95.41     $604.59
TX  GTE                    72 Channels                               NRC      Yes         No          $750.00       N/A     $750.00
TX  GTE                    96 Channels                               MRC      Yes         Yes         $890.00   $121.31     $768.69
TX  GTE                    96 Channels                               NRC      Yes         No        $1,000.00       N/A   $1,000.00
TX  GTE                    120 Channels                              MRC      Yes         Yes       $1,080.00   $147.20     $932.80
TX  GTE                    120 Channels                              NRC      Yes         No        $1,250.00       N/A   $1,250.00
TX  GTE                    144 Channels                              MRC      Yes         Yes       $1,270.00   $173.10   $1,096.90
TX  GTE                    144 Channels                              NRC      Yes         No        $1,500.00       N/A   $1,500.00
TX  GTE                    192 Channels                              MRC      Yes         Yes       $1,650.00   $224.90   $1,425.11
TX  GTE                    192 Channels                              NRC      Yes         No        $2,000.00       N/A   $2,000.00

</TABLE>

<PAGE>   146

                      GTE TELEPHONE OPERATIONS HEADQUARTERS
                 RESALE PRODUCTS & SERVICES - STATE OF TEXAS
                          GTE SOUTHWEST INCORPORATED
                       
<TABLE>
<CAPTION>
         LOCAL                                                     BILLING   RESALE   DISCOUNT      RETAIL      AVOIDED     RESALE
ST  CO   TARIFF                SERVICE DESCRIPTION                   TYPE   POSITION  POSITION       RATE        COST        RATE
- --  --   ------                -------------------                   ----   --------  --------       ----        ----        ----
<S> <C>  <C>       <C>                                              <C>      <C>     <C>          <C>          <C>        <C> 
TX  GTE                    240 Channels                              MRC      Yes         Yes       $2,030.00   $276.69   $1,753.31
TX  GTE                    240 Channels                              NRC      Yes         No        $2,500.00       N/A   $2,500.00
TX  GTE                    672 Channels                              MRC      Yes         Yes       $4,660.00   $635.16   $4,024.84
TX  GTE                    672 Channels                              NRC      Yes         No        $7,000.00       N/A   $7,000.00
TX  GTE                    For increments not identified                                
                             above, 24 channels                      MRC      Yes         Yes         $190.00    $25.90     $164.10
TX  GTE                    For increments not identified                                
                             above, 24 channels                      NRC      Yes         No          $250.00       N/A     $250.00
                                                                                        
                       Digital Channel Capacity-84 Month                                
                         Term                                                           
TX  GTE                    24 Channels                               MRC      Yes         Yes         $300.00    $40.89     $259.11
TX  GTE                    24 Channels                               NRC      Yes         No          $250.00    $34.08     $215.93
TX  GTE                    48 Channels                               MRC      Yes         Yes         $480.00    $65.42     $414.58
TX  GTE                    48 Channels                               NRC      Yes         No          $500.00    $68.15     $431.85
TX  GTE                    72 Channels                               MRC      Yes         Yes         $660.00    $89.96     $570.04
TX  GTE                    72 Channels                               NRC      Yes         No          $750.00   $102.23     $647.78
TX  GTE                    96 Channels                               MRC      Yes         Yes         $840.00   $114.49     $725.51
TX  GTE                    96 Channels                               NRC      Yes         No        $1,000.00   $136.30     $863.70
TX  GTE                    120 Channels                              MRC      Yes         Yes       $1,020.00   $139.03     $880.97
TX  GTE                    120 Channels                              NRC      Yes         No        $1,250.00   $170.38   $1,079.63
TX  GTE                    144 Channels                              MRC      Yes         Yes       $1,200.00   $163.56   $1,036.44
TX  GTE                    144 Channels                              NRC      Yes         No        $1,500.00   $204.45   $1,295.55
TX  GTE                    192 Channels                              MRC      Yes         Yes       $1,560.00   $212.63   $1,347.37
TX  GTE                    192 Channels                              NRC      Yes         No        $2,000.00   $272.60   $1,727.40
TX  GTE                    240 Channels                              MRC      Yes         Yes       $1,920.00   $261.70   $1,658.30
TX  GTE                    240 Channels                              NRC      Yes         No        $2,500.00   $340.75   $2,159.25
TX  GTE                    672 Channels                              MRC      Yes         Yes       $4,370.00   $595.63   $3,774.37
TX  GTE                    672 Channels                              NRC      Yes         No        $7,000.00   $954.10   $6,045.90
TX  GTE                    For increments not identified                                
                             above, 24 channels-MRC                  MRC      Yes         Yes         $180.00    $24.53     $155.47
TX  GTE                                               NRC            NRC      Yes         No          $250.00    $34.08     $215.93
                                                                                        
                        Digital Channel Cap-Month to Month                              
                          at end of contract                                                   
TX  GTE                    24 Channels                               MRC      Yes         Yes         $300.00    $40.89     $259.11
TX  GTE                    48 Channels                               MRC      Yes         Yes         $480.00    $65.42     $414.58
TX  GTE                    72 Channels                               MRC      Yes         Yes         $660.00    $89.96     $570.04

</TABLE>

<PAGE>   147
                      GTE TELEPHONE OPERATIONS HEADQUARTERS
                 RESALE PRODUCTS & SERVICES - STATE OF TEXAS
                          GTE SOUTHWEST INCORPORATED
                       
<TABLE>
<CAPTION>
         LOCAL                                                     BILLING   RESALE   DISCOUNT      RETAIL      AVOIDED     RESALE
ST  CO   TARIFF                SERVICE DESCRIPTION                   TYPE   POSITION  POSITION       RATE        COST        RATE
- --  --   ------                -------------------                   ----   --------  --------       ----        ----        ----
<S> <C>  <C>       <C>                                              <C>      <C>     <C>          <C>          <C>        <C> 
TX  GTE                    96 Channels                               MRC      Yes         Yes         $840.00   $114.49     $725.51
TX  GTE                    120 Channels                              MRC      Yes         Yes       $1,020.00   $139.03     $880.97
TX  GTE                    144 Channels                              MRC      Yes         Yes       $1,200.00   $163.56   $1,036.44
TX  GTE                    192 Channels                              MRC      Yes         Yes       $1,560.00   $212.63   $1,347.37
TX  GTE                    240 Channels                              MRC      Yes         Yes       $1,920.00   $261.70   $1,658.30
TX  GTE                    672 Channels                              MRC      Yes         Yes       $4,370.00   $595.63   $3,774.37
TX  GTE                    For increments not identified                                
                             above, 24 channels                      MRC      Yes         Yes         $180.00    $24.53     $155.47
                                                                                        
TX  GTE                Digital Channel Activation, per channel       MRC      Yes         Yes           $1.00     $0.14       $0.86
TX  GTE                    Per Network Service - Exch line/trunk 
                           or CentraNet                              MRC      Yes         Yes          $15.00     $2.04      $12.96
TX  GTE                                    FX,OPX,Tie LN                                
                                             or PL                   MRC      Yes         Yes          $15.00     $2.04      $12.96
TX  GTE                                    DDS                       MRC      Yes         Yes          $25.00     $3.41      $21.59
TX  GTE                                    DS1                       MRC      Yes         Yes          $75.00    $10.22      $64.78
TX  GTE                                    Switched Data,                               
                                             per line                MRC      Yes         Yes          $10.00     $1.36       $8.64
TX  GTE                    Exch Line/Trunk, Local Calling                               
                             Scope                                   MRC      Yes         Yes          $10.00     $1.36       $8.64
TX  GTE                    Exch Line/Trunk Extended Metro                               
                             Svc                                     MRC      Yes         Yes         $117.00    $15.95     $101.05
TX  GTE                    Switched Data Svc - Usage, per                               
                             minute                                  Usage    Yes         Yes         $0.0300   $0.0041       $0.03
                                                                                        
                       Customer Premises Channelization                                 
TX  GTE                    24 channel increments, 36 Month           MRC      Yes         Yes         $130.00    $17.72     $112.28
TX  GTE                    24 channel increments, 60 month           MRC      Yes         Yes         $120.00    $16.36     $103.64
TX  GTE                    24 channel increments, 84 month           MRC      Yes         Yes         $110.00    $14.99      $95.01
TX  GTE                    24 channel increments, month to                              
                             month                                   MRC      Yes         Yes         $110.00    $14.99      $95.01
                                                                                        
                       Customer Premises Service Activation                             
TX  GTE                    Exch line/Trunk or CentraNet              MRC      Yes         Yes           $5.00     $0.68       $4.32
TX  GTE                    FX,OPX, Tie Line or PL                    MRC      Yes         Yes           $6.00     $0.82       $5.18
TX  GTE                    DDS                                       MRC      Yes         Yes          $15.00     $2.04      $12.96
TX  GTE                    Switched Data                             MRC      Yes         Yes          $25.00     $3.41      $21.59
                                                                                        
              50   Switched Data                                                        
                       Switched Data High Speed and Low Speed                           
                           Switched Data Access - Single Line,                          
                             Multiline                                                  
TX  GTE                       Low Speed, per line - NRC              NRC      Yes         No           $50.00       N/A      $50.00
TX  GTE                          Single Line                         MRC      Yes         Yes          $30.00     $4.09      $25.91

</TABLE>

<PAGE>   148
                      GTE TELEPHONE OPERATIONS HEADQUARTERS
                 RESALE PRODUCTS & SERVICES - STATE OF TEXAS
                          GTE SOUTHWEST INCORPORATED
                       
<TABLE>
<CAPTION>
         LOCAL                                                     BILLING   RESALE   DISCOUNT      RETAIL      AVOIDED     RESALE
ST  CO   TARIFF                SERVICE DESCRIPTION                   TYPE   POSITION  POSITION       RATE        COST        RATE
- --  --   ------                -------------------                   ----   --------  --------       ----        ----        ----
<S> <C>  <C>       <C>                                              <C>      <C>     <C>          <C>          <C>        <C> 
TX  GTE                          Multiline 2-49 lines                MRC      Yes         Yes          $32.00     $4.36      $27.64
TX  GTE                                   50-100 lines               MRC      Yes         Yes          $30.00     $4.09      $25.91
TX  GTE                                   101 + lines                MRC      Yes         Yes          $28.00     $3.82      $24.18
                                                                                        
TX  GTE                       High Speed, per line  NRC              NRC      Yes         No           $50.00       N/A      $50.00
TX  GTE                          Single Line                         MRC      Yes         Yes          $40.00     $5.45      $34.55
TX  GTE                          Multiline 2-49 lines                MRC      Yes         Yes          $42.00     $5.72      $36.28
TX  GTE                                   50-100 lines               MRC      Yes         Yes          $40.00     $5.45      $34.55
TX  GTE                                   101 + lines                MRC      Yes         Yes          $38.00     $5.18      $32.82
                                                                                        
TX  GTE                       Add'l 1/4 MI charge per local                             
                                loop                                 MRC      Yes         Yes           $1.16     $0.16       $1.00
                                                                                        
                       Switched Data Individual Line Loop                               
                         Extension                                                      
                           Extension Access                                             
TX  GTE                       Single Line                            NRC      Yes         No           $50.00       N/A      $50.00
TX  GTE                       Single Line                            MRC      Yes         Yes          $50.00     $6.82      $43.19
TX  GTE                       Multiline                              NRC      Yes         No           $50.00       N/A      $50.00
TX  GTE                       Multiline                              MRC      Yes         Yes          $50.00     $6.82      $43.19
                           Extension Channel                                            
TX  GTE                       Single Line                            NRC      Yes         No           $50.00       N/A      $50.00
TX  GTE                       Single Line                            MRC      Yes         Yes          $12.00     $1.64      $10.36
TX  GTE                       Multiline                              NRC      Yes         No           $50.00       N/A      $50.00
TX  GTE                       Multiline                              MRC      Yes         Yes          $15.00     $2.04      $12.96
                                                                                        
                       Switched Data Channel Access                                     
TX  GTE                    Channel Access (DS1)                      NRC      Yes         No          $300.00       N/A     $300.00
TX  GTE                    Channel Access (DS1)                      MRC      Yes         Yes         $200.00    $27.26     $172.74
TX  GTE                    CO Termination, per access                                   
                             arrangement                             NRC      Yes         No          $120.00       N/A     $120.00
TX  GTE                    CO Termination, per access                                   
                             arrangement                             MRC      Yes         Yes         $155.00    $21.13     $133.87
TX  GTE                    CO Channelization, single                                    
                             line, per channel activated             MRC      Yes         Yes           $5.00     $0.68       $4.32
TX  GTE                    CO Channelization, multiline,                                
                             per channel activated                   MRC      Yes         Yes           $5.00     $0.68       $4.32
TX  GTE                    CO Channelization, multiline                                 
                             with DID/DOD                            MRC      Yes         Yes           $5.00     $0.68       $4.32
TX  GTE                    Customer Premises Termination             NRC      Yes         No           $75.00    $10.22      $64.78
TX  GTE                    Customer Premises Termination             MRC      Yes         Yes          $90.00    $12.27      $77.73
TX  GTE                    Customer Premises Channelization          NRC      Yes         No           $21.00       N/A      $21.00

</TABLE>

<PAGE>   149
                      GTE TELEPHONE OPERATIONS HEADQUARTERS
                 RESALE PRODUCTS & SERVICES - STATE OF TEXAS
                          GTE SOUTHWEST INCORPORATED
                                      
<TABLE>
<CAPTION>
         LOCAL                                                     BILLING   RESALE   DISCOUNT      RETAIL      AVOIDED     RESALE
ST  CO   TARIFF                SERVICE DESCRIPTION                   TYPE   POSITION  POSITION       RATE        COST        RATE
- --  --   -----                 -------------------                   ----   --------  --------       ----        ----        ----
<S> <C>    <C>      <C>                                            <C>      <C>     <C>          <C>          <C>        <C> 
TX  GTE                    Customer Premises Channelization          MRC      Yes         Yes          $32.00     $4.36      $27.64

                       Optional Features, per line                                      
TX  GTE                    Data Direct Connect                       MRC      Yes         Yes           $1.00     $0.14       $0.86
TX  GTE                    Data Closed User Group                    MRC      Yes         Yes           $1.00     $0.14       $0.86
                           Voice Option                                                 
TX  GTE                       Single Line Flat Extended Metro        MRC      Yes         Yes          $20.00     $2.73      $17.27
TX  GTE                       Single Line Flat Metro                 MRC      Yes         Yes           $9.00     $1.23       $7.77
TX  GTE                       Single Line Flat non-metro             MRC      Yes         Yes           $5.50     $0.75       $4.75
TX  GTE                       Single Line measured rate              MRC      Yes         Yes           $5.00     $0.68       $4.32
TX  GTE                       Multiline                              MRC      Yes         Yes           $1.25     $0.17       $1.08
TX  GTE                       Additional number                      MRC      Yes         Yes           $0.00                 $0.00
                                                                                        
                       Optional Feature Packages
TX  GTE                    Data 1000, per line                       MRC      Yes         Yes           $3.00     $0.41       $2.59
TX  GTE                    Data 2000, per line                       MRC      Yes         Yes           $5.00     $0.68       $4.32
                                                                                        
TX  GTE                Software Reconfiguration Charge, per                             
                         occurance                                   NRC      Yes         No           $12.75       N/A      $12.75
                                                                                        
TX  GTE                Network Usage, per minute                     Usage    Yes         Yes         $0.0300   $0.0041       $0.03
                                                                                        
                   SWB PRIVATE LINE TARIFF                                              
                   IntraLATA Interexchange Private Lines                                
              2        Series 100                                                       
                           Local channel, ea per termination                            
                             Type 102                                                   
TX  GTE                       Initial1/4mi                           MRC      Yes         No            $3.70     $0.50       $3.20
TX  GTE                       Initial1/4mi                           NRC      Yes         No           $87.30       N/A      $87.30
TX  GTE                       Ea additional 1/4 mi                   MRC      Yes         No            $1.85     $0.25       $1.60
TX  GTE                    Interoffice channel, ea 1/4 mi            MRC      Yes         No            $3.35     $0.46       $2.89
                           IX Channel                                                   
TX  GTE                       0 to 200/4 mi ea1/4mi                  MRC      Yes         No            $3.70     $0.50        3.20
TX  GTE                       201/4 to 600/4 mi plus $2.00 for                          
                                ea 1/4 mi over 50 mi                 MRC      Yes         No          $740.00   $100.86     $639.14
TX  GTE                       IXC terminal ea required per                              
                                interexchange                        MRC      Yes         No            $7.00     $0.95       $6.05
                       Series 200                                                       

</TABLE>

<PAGE>   150
                      GTE TELEPHONE OPERATIONS HEADQUARTERS
                 RESALE PRODUCTS & SERVICES - STATE OF TEXAS
                          GTE SOUTHWEST INCORPORATED
                       
<TABLE>
<CAPTION>
         LOCAL                                                     BILLING   RESALE   DISCOUNT      RETAIL      AVOIDED     RESALE
ST  CO   TARIFF                SERVICE DESCRIPTION                   TYPE   POSITION  POSITION       RATE        COST        RATE
- --  --   ------                -------------------                   ----   --------  --------       ----        ----        ----
<S> <C>    <C>      <C>                                            <C>      <C>     <C>          <C>          <C>        <C> 
                           Local channel, ea per termination                            
                             on premises                                                
                              Type 250                                                  
TX  GTE                          Half-duplex                         NRC      Yes         No           $87.30       N/A      $87.30
TX  GTE                             First 1/4 mi                     MRC      Yes         No            $9.75     $1.33       $8.42
TX  GTE                             Additional 1/4 mi                MRC      Yes         No            $4.55     $0.62       $3.93
TX  GTE                          Duplex                              NRC      Yes         No           $87.30       N/A      $87.30
TX  GTE                             First 1/4 mi                     MRC      Yes         No           $15.35     $2.09      $13.26
TX  GTE                             Additional 1/4 mi                MRC      Yes         No            $7.10     $0.97       $6.13
                              Type 251                                                  
TX  GTE                          Half-duplex                         NRC      Yes         No           $87.30       N/A      $87.30
TX  GTE                             First 1/4 mi                     MRC      Yes         No           $17.50     $2.39      $15.11
TX  GTE                             Additional 1/4 mi                MRC      Yes         No            $5.50     $0.75       $4.75
TX  GTE                          Duplex                              NRC      Yes         No           $87.30       N/A      $87.30
TX  GTE                             First 1/4 mi                     MRC      Yes         No           $24.75     $3.37      $21.38
TX  GTE                             Additional 1/4 mi                MRC      Yes         No            $7.80     $1.06       $6.74
                           Interoffice channel, ea 1/4 mi,                              
                             per channel                                                
                              Type 250                                                  
TX  GTE                          Half-duplex                         MRC      Yes         No            $1.85     $0.25       $1.60
TX  GTE                          Duplex                              MRC      Yes         No            $1.85     $0.25       $1.60
                              Type 251                                                  
TX  GTE                          Half-duplex                         MRC      Yes         No            $2.15     $0.29       $1.86
TX  GTE                          Duplex                              MRC      Yes         No            $2.15     $0.29       $1.86
                           IX Channel                                                   
                              Type 250                                                  
TX  GTE                          0 to 200/4 mi, for ea 1/4 mi        MRC      Yes         No            $0.90     $0.12       $0.78
TX  GTE                          201/4 to 600/4 mi, plus                                
                                   $0.55 for ea                                         
                                   1/4 mi over 50 mi                 MRC      Yes         No          $180.00    $24.53     $155.47
                              Type 251                                                  
TX  GTE                          0 to 200/4 mi, for ea 1/4 mi        MRC      Yes         No            $1.20     $0.16       $1.04
TX  GTE                          201/4 to 600/4 mi, plus $0.55                          
                                   ea 1/4 mi over 50 mi              MRC      Yes         No          $240.00    $32.71     $207.29
                           IXC terminal                                                 
                              Type 250                                                  
TX  GTE                          Half-duplex                         MRC      Yes         No            $9.40     $1.28       $8.12
TX  GTE                          Duplex                              MRC      Yes         No            $9.00     $1.23       $7.77
                              Type 251                                                  
TX  GTE                          Half-duplex                         MRC      Yes         No           $22.20     $3.03      $19.17

</TABLE>

<PAGE>   151
                      GTE TELEPHONE OPERATIONS HEADQUARTERS
                 RESALE PRODUCTS & SERVICES - STATE OF TEXAS
                          GTE SOUTHWEST INCORPORATED
                       
<TABLE>
<CAPTION>
         LOCAL                                                     BILLING   RESALE   DISCOUNT      RETAIL      AVOIDED     RESALE
ST  CO   TARIFF                SERVICE DESCRIPTION                   TYPE   POSITION  POSITION       RATE        COST        RATE
- --  --   ------                -------------------                   ----   --------  --------       ----        ----        ----
<S> <C>    <C>      <C>                                            <C>      <C>     <C>          <C>          <C>        <C> 
TX  GTE                          Duplex                              MRC      Yes         No           $21.65     $2.95      $18.70
                                                                                        
                       Series 300 and 400                                               
TX  GTE                    Local Channel, ea, per termination                           
                             on a premises                                              
TX  GTE                       Type 314B                              NRC      Yes         No          $174.60       N/A     $174.60
TX  GTE                          First 1/4 mi                        MRC      Yes         No           $29.85     $4.07      $25.78
TX  GTE                          Additional 1/4 mi                   MRC      Yes         No            $9.25     $1.26       $7.99
TX  GTE                       Type 314C                              NRC      Yes         No          $174.60       N/A     $174.60
TX  GTE                       Type 317A                              NRC      Yes         No          $174.60       N/A     $174.60
TX  GTE                          First 1/4 mi                        MRC      Yes         No           $10.20     $1.39       $8.81
TX  GTE                          Additional 1/4 mi                   MRC      Yes         No            $5.10     $0.70       $4.40
TX  GTE                       Type 317B                              NRC      Yes         No          $174.60       N/A     $174.60
TX  GTE                          First 1/4 mi                        MRC      Yes         No           $10.20     $1.39       $8.81
TX  GTE                          Additional 1/4mi                    MRC      Yes         No            $5.10     $0.70       $4.40
TX  GTE                       Type 322                               NRC      Yes         No          $174.60       N/A     $174.60
TX  GTE                          First 1/4 mi                        MRC      Yes         No           $34.25     $4.67      $29.58
TX  GTE                          Additional 1/4 mi                   MRC      Yes         No           $14.40     $1.96      $12.44
TX  GTE                       Type 342                               NRC      Yes         No           $87.30       N/A      $87.30
TX  GTE                          First 1/4 mi                        MRC      Yes         No            $8.95     $1.22       $7.73
TX  GTE                          Additional 1/4 mi                   MRC      Yes         No            $3.90     $0.53       $3.37
TX  GTE                       Type 343                               NRC      Yes         No           $87.30       N/A      $87.30
TX  GTE                          First 1/4 mi                        MRC      Yes         No           $25.25     $3.44      $21.81
TX  GTE                          Additional 1/4 mi                   MRC      Yes         No            $7.80     $1.06       $6.74
TX  GTE                       Type 420                               NRC      Yes         No           $87.30       N/A      $87.30
TX  GTE                          First 1/4 mi                        MRC      Yes         No           $17.10     $2.33      $14.77
TX  GTE                          Additional 1/4 mi                   MRC      Yes         No            $7.35     $1.00       $6.35
TX  GTE                       Type 422                               NRC      Yes         No           $87.30       N/A      $87.30
TX  GTE                          First 1/4 mi                        MRC      Yes         No           $17.10     $2.33      $14.77
TX  GTE                          Additional 1/4 mi                   MRC      Yes         No            $7.35     $1.00       $6.35
TX  GTE                       Type 423                               NRC      Yes         No           $87.30       N/A      $87.30
TX  GTE                          First 1/4 mi                        MRC      Yes         No            $7.00     $0.95       $6.05
TX  GTE                          Additional 1/4 mi                   MRC      Yes         No            $3.60     $0.49       $3.11
TX  GTE                       Type 424                               NRC      Yes         No           $87.30       N/A      $87.30
TX  GTE                          First 1/4 mi                        MRC      Yes         No           $13.75     $1.87      $11.88
TX  GTE                          Additional 1/4 mi                   MRC      Yes         No            $7.90     $1.08       $6.82

</TABLE>


<PAGE>   152
                      GTE TELEPHONE OPERATIONS HEADQUARTERS
                  RESALE PRODUCTS & SERVICES - STATE OF TEXAS
                          GTE SOUTHWEST INCORPORATED
                       
<TABLE>
<CAPTION>
         LOCAL                                                     BILLING   RESALE   DISCOUNT      RETAIL      AVOIDED     RESALE
ST  CO   TARIFF                SERVICE DESCRIPTION                   TYPE   POSITION  POSITION       RATE        COST        RATE
- --  --   ------                -------------------                   ----   --------  --------       ----        ----        ----
<S> <C>    <C>      <C>                                            <C>      <C>     <C>          <C>          <C>        <C> 
TX  GTE                       Type 425                               NRC      Yes         No           $87.30       N/A      $87.30
TX  GTE                          First 1/4 mi                        MRC      Yes         No           $12.40     $1.69      $10.71
TX  GTE                          Additional 1/4 mi                   MRC      Yes         No            $7.80     $1.06       $6.74
TX  GTE                       Type 428                               NRC      Yes         No           $87.30       N/A      $87.30
TX  GTE                          First 1/4 mi                        MRC      Yes         No            $8.90     $1.21       $7.69
TX  GTE                          Additional 1/4 mi                   MRC      Yes         No            $3.90     $0.53       $3.37
TX  GTE                       Type 435                               NRC      Yes         No           $87.30       N/A      $87.30
TX  GTE                          First 1/4 mi                        MRC      Yes         No           $18.35     $2.50      $15.85
TX  GTE                          Additional 1/4 mi                   MRC      Yes         No            $7.80     $1.06       $6.74
TX  GTE                     Interoffice channel, ea 1/4 mi per                          
                              channel                                MRC      Yes         No            $2.85     $0.39       $2.46
                           Bridging charge (multipoint service)                         
TX  GTE                     Interoffice channel bridged              MRC      Yes         No           $10.85     $1.48       $9.37
TX  GTE                     IX channel bridged                       MRC      Yes         No           $11.70     $1.59      $10.11
                           IX channel                                                   
                              Schedule 2                                                
TX  GTE                          0 to 200/4 mi for ea 1/4 mi         MRC      Yes         No            $1.45     $0.20       $1.25
TX  GTE                          201/4 to 600/4 plus $0.95 ea                           
                                   1/4 mi over 200/4 mi              MRC      Yes         No          $290.00    $39.53     $250.47
                              Schedule 3                                                
TX  GTE                          0 to 200/4 mi for ea 1/4 mi         MRC      Yes         No            $1.75     $0.24       $1.51
TX  GTE                          201/4 to 600/4 plus $1.20 ea                           
                                   1/4 mi over 200/4 mi              MRC      Yes         No          $350.00    $47.71     $302.30
                           IXC terminal                                                 
TX  GTE                       Type 314B                              MRC      Yes         No            $7.80     $1.06       $6.74
TX  GTE                       Type 314C                              MRC      Yes         No           $50.15     $6.84      $43.31
TX  GTE                       Type 317A                              MRC      Yes         No           $18.20     $2.48      $15.72
TX  GTE                       Type 317B                              MRC      Yes         No           $18.20     $2.48      $15.72
TX  GTE                       Type 322                               MRC      Yes         No           $57.70     $7.86      $49.84
TX  GTE                       Type 342                               MRC      Yes         No            $2.25     $0.31       $1.94
TX  GTE                       Type 343                               MRC      Yes         No            $5.60     $0.76       $4.84
TX  GTE                       Type 420                               MRC      Yes         No            $3.70     $0.50       $3.20
TX  GTE                       Type 422                               MRC      Yes         No            $3.70     $0.50       $3.20
TX  GTE                       Type 423                               MRC      Yes         No            $4.65     $0.63       $4.02
TX  GTE                       Type 424                               MRC      Yes         No            $6.60     $0.90       $5.70
TX  GTE                       Type 425                               MRC      Yes         No            $4.20     $0.57       $3.63
TX  GTE                       Type 428                               MRC      Yes         No            $6.50     $0.89       $5.61
TX  GTE                       Type 435                               MRC      Yes         No            $2.65     $0.36       $2.29

</TABLE>

<PAGE>   153
                      GTE TELEPHONE OPERATIONS HEADQUARTERS
                 RESALE PRODUCTS & SERVICES - STATE OF TEXAS
                          GTE SOUTHWEST INCORPORATED
                       
<TABLE>
<CAPTION>
         LOCAL                                                     BILLING   RESALE   DISCOUNT      RETAIL      AVOIDED     RESALE
ST  CO   TARIFF                SERVICE DESCRIPTION                   TYPE   POSITION  POSITION       RATE        COST        RATE
- --  --   ------                -------------------                   ----   --------  --------       ----        ----        ----
<S> <C>    <C>      <C>                                            <C>      <C>     <C>          <C>          <C>        <C> 
TX  GTE                FX Local Channel (ea)                         NRC      Yes         No          $186.00       N/A     $186.00
TX  GTE                FX Local Channel (ea)                         MRC      Yes         No           $12.00     $1.64      $10.36
TX  GTE                FX Point of Termination                       NRC      Yes         No          $174.00       N/A     $174.00
TX  GTE                FX Point of Termination                       MRC      Yes         No            $0.00                 $0.00
TX  GTE                FX Local Exchange Usage                                          
TX  GTE                Per Minute                                    USAGE    Yes         No          $0.0210   $0.0029       $0.02
                           Conditioning options                                         
                              Type C1                                                   
TX  GTE                          Two-point not arranged for                             
                                   switching, per sta                MRC      Yes         No           $10.15     $1.38       $8.77
TX  GTE                          Two-point not arranged for                             
                                   switching, per sta                NRC      Yes         No           $72.75       N/A      $72.75
TX  GTE                          Two-point arranged for                                 
                                   switching chnnel, per sta         MRC      Yes         No           $18.35     $2.50      $15.85
TX  GTE                          Two-point arranged for                                 
                                   switching chnnel, per sta         NRC      Yes         No           $72.75       N/A      $72.75
TX  GTE                          Multipoint channel, per sta         MRC      Yes         No           $20.30     $2.77      $17.53
TX  GTE                          Multipoint channel, per sta         NRC      Yes         No           $72.75       N/A      $72.75
                              Type C2                                                   
TX  GTE                          Two-point not arranged for                             
                                   switching, per sta                MRC      Yes         No           $40.50     $5.52      $34.98
TX  GTE                          Two-point not arranged for                             
                                   switching, per sta                NRC      Yes         No           $90.95       N/A      $90.95
TX  GTE                          Two-point arranged for                                 
                                   switching, per sta                MRC      Yes         No           $60.85     $8.29      $52.56
TX  GTE                          Two-point arranged for                                 
                                   switching, per sta                NRC      Yes         No           $90.95       N/A      $90.95
TX  GTE                          Multipoint channel, per sta         MRC      Yes         No           $60.85     $8.29      $52.56
TX  GTE                          Multipoint channel, per sta         NRC      Yes         No           $90.95       N/A      $90.95
                              Type C4                                                   
TX  GTE                          Two-point channel, per sta          MRC      Yes         No           $70.95     $9.67      $61.28
TX  GTE                          Two-point channel, per sta          NRC      Yes         No          $123.65       N/A     $123.65
TX  GTE                          Three-point channel, per sta        MRC      Yes         No           $91.20    $12.43      $78.77
TX  GTE                          Three-point channel, per sta        NRC      Yes         No          $123.65       N/A     $123.65
                              Type C5                                                   
TX  GTE                          On two-point channel not                               
                                   arranged  for switching           MRC      Yes         No          $101.35    $13.81      $87.54
TX  GTE                          On two-point channel not                               
                                   arranged for switching            NRC      Yes         No          $123.65       N/A     $123.65
                              Type D1   {2}                                             
TX  GTE                          Two-point channel not arranged                         
                                   for switching                     MRC      Yes         No           $12.15     $1.66      $10.49
TX  GTE                          Two-point channel not arranged                         
                                   for switching                     NRC      Yes         No           $90.95       N/A      $90.95
                           Signaling                                                    
                              IX                                                        
TX  GTE                          Manual                              MRC      Yes         No           $35.85     $4.89      $30.96

</TABLE>

<PAGE>   154
                      GTE TELEPHONE OPERATIONS HEADQUARTERS
                 RESALE PRODUCTS & SERVICES - STATE OF TEXAS
                          GTE SOUTHWEST INCORPORATED
                       
<TABLE>
<CAPTION>
         LOCAL                                                     BILLING   RESALE   DISCOUNT      RETAIL      AVOIDED     RESALE
ST  CO   TARIFF                SERVICE DESCRIPTION                   TYPE   POSITION  POSITION       RATE        COST        RATE
- --  --   ------                -------------------                   ----   --------  --------       ----        ----        ----
<S> <C>    <C>      <C>                                            <C>      <C>     <C>          <C>          <C>        <C> 
TX  GTE                          Manual                              NRC      Yes         No           $58.20       N/A      $58.20
TX  GTE                          Automatic                           MRC      Yes         No           $37.85     $5.16      $32.69
TX  GTE                          Automatic                           NRC      Yes         No           $58.20       N/A      $58.20
                                 E & M Type                                             
TX  GTE                             Type 420 {2}                     MRC      Yes         No           $28.10     $3.83      $24.27
TX  GTE                             Type 420 {2}                     NRC      Yes         No           $58.20       N/A      $58.20
TX  GTE                             Type 422 {2}                     MRC      Yes         No           $39.35     $5.36      $33.99
TX  GTE                             Type 422 {2}                     NRC      Yes         No           $58.20       N/A      $58.20
TX  GTE                             Type 423 {2}                     MRC      Yes         No           $29.25     $3.99      $25.26
TX  GTE                             Type 423 {2}                     NRC      Yes         No           $58.20       N/A      $58.20
TX  GTE                             Type 424                         MRC      Yes         No           $13.55     $1.85      $11.70
TX  GTE                             Type 424                         NRC      Yes         No           $58.20       N/A      $58.20
TX  GTE                             Type 425 {2}                     MRC      Yes         No           $38.55     $5.25      $33.30
TX  GTE                             Type 425 {2}                     NRC      Yes         No           $58.20       N/A      $58.20
TX  GTE                             Type 428 {2}                     MRC      Yes         No           $28.80     $3.93      $24.87
TX  GTE                             Type 428 {2}                     NRC      Yes         No           $58.20       N/A      $58.20
TX  GTE                             Type 435 {2}                     MRC      Yes         No           $31.55     $4.30      $27.25
TX  GTE                             Type 435 {2}                     NRC      Yes         No           $58.20       N/A      $58.20
                                 Loop signaling capable of 900                          
                                   ohms or more                                         
TX  GTE                             Type 420                         MRC      Yes         No           $46.00     $6.27      $39.73
TX  GTE                             Type 420                         NRC      Yes         No           $58.20       N/A      $58.20
TX  GTE                             Type 422                         MRC      Yes         No           $46.00     $6.27      $39.73
TX  GTE                             Type 422                         NRC      Yes         No           $58.20       N/A      $58.20
TX  GTE                             Type 423                         MRC      Yes         No           $48.30     $6.58      $41.72
TX  GTE                             Type 423                         NRC      Yes         No           $58.20       N/A      $58.20
TX  GTE                             Type 435                         MRC      Yes         No           $46.00     $6.27      $39.73
TX  GTE                             Type 435                         NRC      Yes         No           $58.20       N/A      $58.20
TX  GTE                          Loop signaling capable of less                         
                                   than 900 ohms                                        
TX  GTE                             Type 420                         MRC      Yes         No           $47.95     $6.54      $41.41
TX  GTE                             Type 420                         NRC      Yes         No           $58.20       N/A      $58.20
TX  GTE                             Type 422                         MRC      Yes         No           $47.95     $6.54      $41.41
TX  GTE                             Type 422                         NRC      Yes         No           $58.20       N/A      $58.20
TX  GTE                             Type 423                         MRC      Yes         No           $49.90     $6.80      $43.10
TX  GTE                             Type 423                         NRC      Yes         No           $58.20       N/A      $58.20
TX  GTE                             Type 435                         MRC      Yes         No           $47.95     $6.54      $41.41

</TABLE>

<PAGE>   155
                      GTE TELEPHONE OPERATIONS HEADQUARTERS
                 RESALE PRODUCTS & SERVICES - STATE OF TEXAS
                          GTE SOUTHWEST INCORPORATED
                       
<TABLE>
<CAPTION>
         LOCAL                                                     BILLING   RESALE   DISCOUNT      RETAIL      AVOIDED     RESALE
ST  CO   TARIFF                SERVICE DESCRIPTION                   TYPE   POSITION  POSITION       RATE        COST        RATE
- --  --   ------                -------------------                   ----   --------  --------       ----        ----        ----
<S> <C>    <C>     <C>                                             <C>      <C>     <C>          <C>          <C>        <C> 
TX  GTE                             Type 435                         NRC      Yes         No           $58.20       N/A      $58.20
TX  GTE                          Loop signaling Type 428                                
TX  GTE                             Type A, 0-199 ohms               MRC      Yes         No           $10.60     $1.44       $9.16
TX  GTE                             Type A, 0-199 ohms               NRC      Yes         No           $58.20       N/A      $58.20
TX  GTE                             Type B, 200-899 ohms             MRC      Yes         No           $10.60     $1.44       $9.16
TX  GTE                             Type B, 200-899 ohms             NRC      Yes         No           $58.20       N/A      $58.20
TX  GTE                             Type C, 900 ohms or more         MRC      Yes         No           $10.60     $1.44       $9.16
TX  GTE                             Type C, 900 ohms or more         NRC      Yes         No           $58.20       N/A      $58.20
                                                                                        
                   INTRALATA/INTEREXCHANGE TARIFF                                       
           4A                                                                        
                       DS1 LOCAL LOOP (DS1 LL)                                          
TX  GTE                    First DS1 Month/Month                     MRC      Yes         Yes         $298.00    $40.62     $257.38
TX  GTE                    First DS1                                 NRC      Yes         No          $800.00       N/A     $800.00
TX  GTE                    Public Service                            MRC      Yes         Yes         $253.30    $34.52     $218.78
TX  GTE                    12 Month Contract                         MRC      Yes         Yes         $283.00    $38.57     $244.43
TX  GTE                    36 Month Contract                         MRC      Yes         Yes         $255.00    $34.76     $220.24
TX  GTE                    60 Month Contract                         MRC      Yes         Yes         $226.00    $30.80     $195.20
                           Additional DS1 (Ea.) (Available                              
                             with all First DS1                                         
TX  GTE                    offerings)                                MRC      Yes         Yes         $145.00    $19.76     $125.24
TX  GTE                    Add'l DS1                                 NRC      Yes         No          $150.00       N/A     $150.00
TX  GTE                    Public Service                            MRC      Yes         Yes         $253.30    $34.52     $218.78
                                                                                        
                           DS1 Transport                                                
TX  GTE                       Per Airline Mile                       MRC      Yes         Yes          $16.00     $2.18      $13.82
TX  GTE                       Public Service                         MRC      Yes         Yes           $0.00                 $0.00
                                                                                        
                           DS1 Transport Termination                                    
TX  GTE                       Per Termination                        MRC      Yes         Yes          $40.00     $5.45      $34.55
                                 Public Service                                                                     N/A
TX  GTE                             Per Termination                  MRC      Yes         Yes          $29.60     $4.03      $25.57
                                                                                                                    N/A
                       FRACTIONAL T1                                                    
           4A              Month-to-Month                                               
TX  GTE                       2 x 56/64 kbps                         MRC      Yes         Yes         $103.78    $14.15      $89.63

</TABLE>

<PAGE>   156
                      GTE TELEPHONE OPERATIONS HEADQUARTERS
                 RESALE PRODUCTS & SERVICES - STATE OF TEXAS
                          GTE SOUTHWEST INCORPORATED
                       
<TABLE>
<CAPTION>
         LOCAL                                                     BILLING   RESALE   DISCOUNT      RETAIL      AVOIDED     RESALE
ST  CO   TARIFF                SERVICE DESCRIPTION                   TYPE   POSITION  POSITION       RATE        COST        RATE
- --  --   ------                -------------------                   ----   --------  --------       ----        ----        ----
<S> <C>    <C>      <C>                                            <C>      <C>     <C>          <C>          <C>        <C> 
TX  GTE                       2 x 56/64 kbps                         NRC      Yes         No          $400.00       N/A     $400.00
TX  GTE                       4 x 56/64 kbps                         MRC      Yes         Yes         $111.59    $15.21      $96.38
TX  GTE                       4 x 56/64 kbps                         NRC      Yes         No          $400.00       N/A     $400.00
TX  GTE                       6 x 56/64 kbps                         MRC      Yes         Yes         $119.39    $16.27     $103.12
TX  GTE                       6 x 56/64 kbps                         NRC      Yes         No          $400.00       N/A     $400.00
                                                                                        
                            12-Month Contract                                           
TX  GTE                       2 x 56/64 kbps                         MRC      Yes         Yes         $100.00    $13.63      $86.37
TX  GTE                       4 x 56/64 kbps                         MRC      Yes         Yes         $110.00    $14.99      $95.01
TX  GTE                       6 x 56/64 kbps                         MRC      Yes         Yes         $119.00    $16.22     $102.78
                            36-Month Contract                                           
TX  GTE                       2 x 56/64 kbps                         MRC      Yes         Yes          $90.00    $12.27      $77.73
TX  GTE                       4 x 56/64 kbps                         MRC      Yes         Yes          $99.00    $13.49      $85.51
TX  GTE                       6 x 56/64 kbps                         MRC      Yes         Yes         $107.10    $14.60      $92.50
                            60-Month Contract                                           
TX  GTE                       2 x 56/64 kbps                         MRC      Yes         Yes          $80.00    $10.90      $69.10
TX  GTE                       4 x 56/64 kbps                         MRC      Yes         Yes          $88.00    $11.99      $76.01
TX  GTE                       6 x 56/64 kbps                         MRC      Yes         Yes          $95.20    $12.98      $82.22
                           Fractional T1 Transport (per                                 
                             airline mile)                                              
TX  GTE                       2 x 56/64 kbps                         MRC      Yes         Yes           $5.50     $0.75       $4.75
TX  GTE                       4 x 56/64 kbps                         MRC      Yes         Yes           $6.50     $0.89       $5.61
TX  GTE                       6 x 56/64 kbps                         MRC      Yes         Yes           $7.50     $1.02       $6.48
                           Fractional T1 Transport Term (per                            
                             airline mile)                                              
TX  GTE                       2 x 56/64 kbps                         MRC      Yes         Yes          $12.00     $1.64      $10.36
TX  GTE                       4 x 56/64 kbps                         MRC      Yes         Yes          $18.00     $2.45      $15.55
TX  GTE                       6 x 56/64 kbps                         MRC      Yes         Yes          $24.00     $3.27      $20.73
                                                                                        
           4B          FIBERCONNECT                                                     
                           Local Loop (Electrical Interface)                            
TX  GTE                       Month-to-Month                         MRC      Yes         Yes       $1,200.00   $163.56   $1,036.44
TX  GTE                       Month-to-Month                         NRC      Yes         No        $3,500.00       N/A   $3,500.00
TX  GTE                          12 Month                            MRC      Yes         Yes       $1,125.00   $153.34     $971.66
TX  GTE                          12 Month                            NRC      Yes         No        $1,000.00       N/A   $1,000.00
TX  GTE                          36 Month                            MRC      Yes         Yes         $800.00   $109.04     $690.96
TX  GTE                          36 Month                            NRC      Yes         No        $1,000.00       N/A   $1,000.00

</TABLE>

<PAGE>   157
                      GTE TELEPHONE OPERATIONS HEADQUARTERS
                  RESALE PRODUCTS & SERVICES STATE OF TEXAS
                          GTE SOUTHWEST INCORPORATED
                       
<TABLE>
<CAPTION>
         LOCAL                                                     BILLING   RESALE   DISCOUNT      RETAIL      AVOIDED     RESALE
ST  CO   TARIFF                SERVICE DESCRIPTION                   TYPE   POSITION  POSITION       RATE        COST        RATE
- --  --   ------                -------------------                   ----   --------  --------       ----        ----        ----
<S> <C>    <C>      <C>                                            <C>      <C>     <C>          <C>          <C>        <C> 
TX  GTE                          60 Month                            MRC      Yes         Yes         $700.00    $95.41     $604.59
TX  GTE                          60 Month                            NRC      Yes         No        $1,000.00       N/A   $1,000.00
                                                                                        
                           FiberConnect Local Loop (Optical                             
                             Interface)                                                 
                                                                                        
TX  GTE                    Month-to-Month                            MRC      Yes         Yes       $1,050.00   $143.12     $906.89
TX  GTE                    Month-to-Month                            NRC      Yes         No        $3,500.00       N/A   $3,500.00
TX  GTE                       12 Month                               MRC      Yes         Yes         $900.00   $122.67     $777.33
TX  GTE                       12 Month                               NRC      Yes         No        $1,000.00       N/A   $1,000.00
TX  GTE                       36 Month                               MRC      Yes         Yes         $600.00    $81.78     $518.22
TX  GTE                       36 Month                               NRC      Yes         No        $1,000.00       N/A   $1,000.00
TX  GTE                       60 Month                               MRC      Yes         Yes         $525.00    $71.56     $453.44
TX  GTE                       60 Month                               NRC      Yes         No        $1,000.00       N/A   $1,000.00
                                                                                        
            5          DIGITAL DATA SERVICE                                             
                                                                                        
                           DDS Local Loop (DDS LL)                                      
                                                                                        
TX  GTE                       2.4 KBPS                               MRC      Yes         Yes          $85.00    $11.59      $73.41
TX  GTE                       2.4 KBPS                               NRC      Yes         No          $250.00       N/A     $250.00
TX  GTE                       4.8 KBPS                               MRC      Yes         Yes          $85.00    $11.59      $73.41
TX  GTE                       4.8 KBPS                               NRC      Yes         No          $250.00       N/A     $250.00
TX  GTE                       9.6 KBPS                               MRC      Yes         Yes          $85.00    $11.59      $73.41
TX  GTE                       9.6 KBPS                               NRC      Yes         No          $250.00       N/A     $250.00
TX  GTE                       19.2 KBPS                              MRC      Yes         Yes          $85.00    $11.59      $73.41
TX  GTE                       19.2 KBPS                              NRC      Yes         No          $250.00       N/A     $250.00
TX  GTE                       56 KBPS                                MRC      Yes         Yes          $95.00    $12.95      $82.05
TX  GTE                       56 KBPS                                NRC      Yes         No          $250.00       N/A     $250.00
                                                                                        
                           DDS Transport (Per Airline Mile)                             
                                                                                        
TX  GTE                       2.4 KBPS                               MRC      Yes         Yes           $1.60     $0.22       $1.38
                              2.4 KBPS                               NRC      Yes         No            $0.00                 $0.00
TX  GTE                       4.8 KBPS                               MRC      Yes         Yes           $1.60     $0.22       $1.38
                              4.8 KBPS                               NRC      Yes         No            $0.00                 $0.00

</TABLE>

<PAGE>   158
                      GTE TELEPHONE OPERATIONS HEADQUARTERS
                  RESALE PRODUCTS & SERVICES STATE OF TEXAS
                          GTE SOUTHWEST INCORPORATED
                       
<TABLE>
<CAPTION>
         LOCAL                                                     BILLING   RESALE   DISCOUNT      RETAIL      AVOIDED     RESALE
ST  CO   TARIFF                SERVICE DESCRIPTION                   TYPE   POSITION  POSITION       RATE        COST        RATE
- --  --   ------                -------------------                   ----   --------  --------       ----        ----        ----
<S> <C>    <C>      <C>                                            <C>      <C>     <C>          <C>          <C>        <C> 
TX  GTE                       9.6 KBPS                               MRC      Yes         Yes           $1.60     $0.22       $1.38
                              9.6 KBPS                               NRC      Yes         No            $0.00                 $0.00
TX  GTE                       19.2 KBPS                              MRC      Yes         Yes           $1.60     $0.22       $1.38
                              19.2 KBPS                              NRC      Yes         No            $0.00                 $0.00
TX  GTE                       56 KBPS                                MRC      Yes         Yes           $3.20     $0.44       $2.76
                              56 KBPS                                NRC      Yes         No            $0.00                 $0.00
                                                                                        
TX  GTE                    DDS Transport Termination (per 
                             Termination)                            MRC      Yes         Yes          $20.00     $2.73      $17.27
                                                                                        
            6          PACKET SWITCHING NETWORK SERVICE                                 
                                                                                        
                           Usage - Transactional Plan
TX  GTE                       Each 15-second or shorter                                 
                                transaction                          USAGE     Yes         Yes        $0.0100   $0.0014     $0.0086
TX  GTE                       Each 15-second or shorter                                             
                                overtime transaction                 USAGE     Yes         Yes        $0.0100   $0.0014     $0.0086
                                                                                                    
                           Usage - Basic Plan                                                        
                              Day Rates                                                             
TX  GTE                          (1) Per minute or portion                                          
                                     thereof                         USAGE     Yes         Yes        $0.0150   $0.0020     $0.0130
TX  GTE                          (2) Per kilosegment                 USAGE     Yes         Yes        $0.3000   $0.0409     $0.2591
                              Night/Holiday Rates                                                   
TX  GTE                          (1) Per minute or portion                                          
                                     thereof                         USAGE     Yes         Yes        $0.0050   $0.0007     $0.0043
TX  GTE                          (2) Per kilosegment                 USAGE     Yes         Yes        $0.2000   $0.0273     $0.1727
                                                                                                    
                           Usage - High Volume Plan                                                  
                              Day Rates                                                             
TX  GTE                          Per minute or portion thereof       USAGE     Yes         Yes        $0.0150   $0.0020     $0.0130
                                 Per kilosegment                                                    
TX  GTE                             (a) 0001 to 2000 kilosegments    USAGE     Yes         Yes        $0.3000   $0.0409     $0.2591
TX  GTE                             (b) 2001 to 4000 kilosegments    USAGE     Yes         Yes        $0.2700   $0.0368     $0.2332
TX  GTE                             (c) 4001 to 6000 kilosegments    USAGE     Yes         Yes        $0.2300   $0.0313     $0.1987
TX  GTE                             (d) More than 6000                                              
                                        kilosegments                 USAGE     Yes         Yes        $0.1800   $0.0245     $0.1555
                              Night/Holiday Rates                                                   
TX  GTE                          Per minute or portion thereof       USAGE     Yes         Yes        $0.0050   $0.0007     $0.0043
                                 Per kilosegment                                                    
TX  GTE                             (a) 0001 to 2000 kilosegments    USAGE     Yes         Yes        $0.3000   $0.0409     $0.2591

</TABLE>

<PAGE>   159
                      GTE TELEPHONE OPERATIONS HEADQUARTERS
                   RESALE PRODUCTS & SERVICES STATE OF TEXAS
                          GTE SOUTHWEST INCORPORATED
                       
<TABLE>
<CAPTION>
         LOCAL                                                     BILLING   RESALE   DISCOUNT      RETAIL      AVOIDED     RESALE
ST  CO   TARIFF                SERVICE DESCRIPTION                   TYPE   POSITION  POSITION       RATE        COST        RATE
- --  --   ------                -------------------                   ----   --------  --------       ----        ----        ----
<S> <C>    <C>      <C>                                            <C>      <C>     <C>          <C>          <C>        <C> 
TX  GTE                             (b) 2001 to 4000 kilosegments    USAGE     Yes         Yes         $0.2700   $0.0368     $0.2332
TX  GTE                             (c) 4001 to 6000 kilosegments    USAGE     Yes         Yes         $0.2300   $0.0313     $0.1987
TX  GTE                             (d) More than 6000 kilosegments  USAGE     Yes         Yes         $0.1800   $0.0245     $0.1555
                                                                                        
                           Usage Basic Permanent Virtual Circuit                        
                             Plan Per Kilosegment                                       
TX  GTE                       Day Rates                              USAGE     Yes         Yes         $0.6000   $0.0818     $0.5182
TX  GTE                       Night/Holiday Rates                    USAGE     Yes         Yes         $0.4000   $0.0545     $0.3455
                           Usage - High Volume Premanent Virtual                          
                             Circuit Plan                                               
                              Per kilosegment                                           
TX  GTE                          (a) 0001 to 2000 kilosegments       USAGE     Yes         Yes         $0.6000   $0.0818     $0.5182
TX  GTE                          (b) 2001 to 4000 kilosegments       USAGE     Yes         Yes         $0.5000   $0.0682     $0.4319
TX  GTE                          (c) 4001 to 6000 kilosegments       USAGE     Yes         Yes         $0.4000   $0.0545     $0.3455
TX  GTE                          (d) More than 6000 kilosegments     USAGE     Yes         Yes         $0.3000   $0.0409     $0.2591
                                                                                        
                           Call Detail                                                  
                              Per Month                                                 
TX  GTE                          1 to 49 lines                       MRC       Yes         Yes         $25.00     $3.41      $21.59
TX  GTE                          More than 49 lines                  MRC       Yes         Yes         $50.00     $6.82      $43.19
                                                                                        
                           Fast Select                                                  
TX  GTE                       Per Virtual Connection                 USAGE     Yes         Yes         $0.0010   $0.0001     $0.0009
                                                                                        
                           Priority                                                     
TX  GTE                       Per kilosegment                        USAGE     Yes         Yes         $0.3500   $0.0477     $0.3023
                                                                                        
                           Dedicated Access                                             
TX  GTE                       1.2 kbps                               MRC       Yes         Yes         $35.00     $4.77      $30.23
TX  GTE                       1.2 kbps                               NRC       Yes          No         $120.00       N/A     $120.00
TX  GTE                       2.4 kbps                               MRC       Yes         Yes         $35.00     $4.77      $30.23
TX  GTE                       2.4 kbps                               NRC       Yes          No         $120.00       N/A     $120.00
TX  GTE                       4.8 kbps                               MRC       Yes         Yes         $35.00     $4.77      $30.23
TX  GTE                       4.8 kbps                               NRC       Yes          No         $120.00       N/A     $120.00
TX  GTE                       9.6 kbps                               MRC       Yes         Yes         $35.00     $4.77      $30.23
TX  GTE                       9.6 kbps                               NRC       Yes          No         $120.00       N/A     $120.00

</TABLE>

<PAGE>   160
                      GTE TELEPHONE OPERATIONS HEADQUARTERS
                  RESALE PRODUCTS & SERVICES STATE OF TEXAS
                          GTE SOUTHWEST INCORPORATED
                       
<TABLE>
<CAPTION>
         LOCAL                                                     BILLING   RESALE   DISCOUNT      RETAIL      AVOIDED     RESALE
ST  CO   TARIFF                SERVICE DESCRIPTION                   TYPE   POSITION  POSITION       RATE        COST        RATE
- --  --   ------                -------------------                   ----   --------  --------       ----        ----        ----
<S> <C>    <C>      <C>                                            <C>      <C>     <C>          <C>          <C>        <C> 
TX  GTE                       56/64 kbps                             MRC      Yes         Yes          $35.00     $4.77      $30.23
TX  GTE                       56/64 kbps                             NRC      Yes         No          $120.00       N/A     $120.00
                                                                                        
                                                                                        
            7          MEGACONNECT SERVICE                                              
                                                                                        
                           SMDS Connection                                              
TX  GTE                       SMDS Access (DSO-56 kbps), per port    MRC      Yes         Yes         $105.00    $14.31      $90.69
TX  GTE                       SMDS Access (DSO-56 kbps), per port    NRC      Yes         No           $95.00       N/A      $95.00
TX  GTE                       SMDS Access (DS1 - 1.17 kbps), per                        
                                port                                 MRC      Yes         Yes         $400.00    $54.52     $345.48
TX  GTE                       SMDS Access (DS1 - 1.17 kbps),                            
                                per port                             NRC      Yes         No           $25.00       N/A      $25.00
TX  GTE                       SMDS Access Class 1 (DS3 -4 kbps),                        
                                per port                             MRC      Yes         Yes       $2,000.00   $272.60   $1,727.40
TX  GTE                       SMDS Access Class 1 (DS3 -4 kbps),                        
                                per port                             NRC      Yes         No        $1,000.00       N/A   $1,000.00
TX  GTE                       SMDS Access Class 2 (DS3 -10 kbps),                       
                                per port                             MRC      Yes         Yes       $2,200.00   $299.86   $1,900.14
TX  GTE                       SMDS Access Class 2 (DS3 -10 kbps),                       
                                per port                             NRC      Yes         No        $1,000.00       N/A   $1,000.00
TX  GTE                       SMDS Access Class 3 (DS3 -16 kbps),                       
                                per port                             MRC      Yes         Yes       $2,400.00   $327.12   $2,072.88
TX  GTE                       SMDS Access Class 3 (DS3 -16 kbps),                       
                                per port                             NRC      Yes         No        $1,000.00       N/A   $1,000.00
TX  GTE                       SMDS Access Class 4 (DS3 -25 kbps),                       
                                per port                             MRC      Yes         Yes       $2,600.00   $354.38   $2,245.62
TX  GTE                       SMDS Access Class 4 (DS3 -25 kbps),                       
                                per port                             NRC      Yes         No        $1,000.00       N/A   $1,000.00
TX  GTE                       SMDS Access Class 5 (DS3 -34 kbps),                       
                                per port                             MRC      Yes         Yes       $2,800.00   $381.64   $2,418.36
TX  GTE                       SMDS Access Class 5 (DS3 -34 kbps),                       
                                per port                             NRC      Yes         No        $1,000.00       N/A   $1,000.00
                                                                                        
                           Subsequent Activity Charge                                   
TX  GTE                       per SNI affected on existing service   NRC      Yes         No           $25.00       N/A      $25.00
                                                                                        
                           Optional Feature                                             
TX  GTE                       Group Address Creation, per list       MRC      Yes         Yes          $25.00     $3.41      $21.59
TX  GTE                       Group Address Creation, per list       NRC      Yes         No           $25.00       N/A      $25.00
TX  GTE                    Customer Network Management               MRC      Yes         Yes          $19.00     $2.59      $16.41
TX  GTE                    Customer Network Management               NRC      Yes         No           $40.00       N/A      $40.00
                                                                                        
            8          MULTIMEDIA DATA SERVICE (MMDS)                                   
                                                                                        
                          MMDS First Data Link                                          
TX  GTE                    12 Month Contract                         MRC      Yes         Yes         $750.00   $102.23     $647.78

</TABLE>

<PAGE>   161
                      GTE TELEPHONE OPERATIONS HEADQUARTERS
                 RESALE PRODUCTS & SERVICES - STATE OF TEXAS
                          GTE SOUTHWEST INCORPORATED
                       
<TABLE>
<CAPTION>
         LOCAL                                                     BILLING   RESALE   DISCOUNT      RETAIL      AVOIDED     RESALE
ST  CO   TARIFF                SERVICE DESCRIPTION                   TYPE   POSITION  POSITION       RATE        COST        RATE
- --  --   ------                -------------------                   ----   --------  --------       ----        ----        ----
<S> <C>    <C>      <C>                                            <C>      <C>     <C>          <C>          <C>        <C> 
TX  GTE                    12 Month Contract                         NRC      Yes         No        $3,300.00       N/A   $3,300.00
TX  GTE                    36 Month Contract                         MRC      Yes         Yes         $700.00    $95.41     $604.59
TX  GTE                    36 Month Contract                         NRC      Yes         No        $3,300.00       N/A   $3,300.00
TX  GTE                    60 Month Contract                         MRC      Yes         Yes         $650.00    $88.60     $561.41
TX  GTE                    60 Month Contract                         NRC      Yes         No        $3,300.00       N/A   $3,300.00
                         MMDS Additional Data Link                                    
TX  GTE                    12 Month Contract                         MRC      Yes         Yes         $115.00    $15.67      $99.33
TX  GTE                    12 Month Contract                         NRC      Yes         No          $200.00       N/A     $200.00
TX  GTE                    36 Month Contract                         MRC      Yes         Yes         $100.00    $13.63      $86.37
TX  GTE                    36 Month Contract                         NRC      Yes         No          $200.00       N/A     $200.00
TX  GTE                    60 Month Contract                         MRC      Yes         Yes          $90.00    $12.27      $77.73
TX  GTE                    60 Month Contract                         NRC      Yes         No          $200.00       N/A     $200.00
                         MMDS Video Link                                              
TX  GTE                    12 Month Contract                         MRC      Yes         Yes         $415.00    $56.56     $358.44
TX  GTE                    12 Month Contract                         NRC      Yes         No        $3,000.00       N/A   $3,000.00
TX  GTE                    36 Month Contract                         MRC      Yes         Yes         $400.00    $54.52     $345.48
TX  GTE                    36 Month Contract                         NRC      Yes         No        $3,000.00       N/A   $3,000.00
TX  GTE                    60 Month Contract                         MRC      Yes         Yes         $380.00    $51.79     $328.21
TX  GTE                    60 Month Contract                         NRC      Yes         No        $3,000.00       N/A   $3,000.00
                                                                                        
TX  GTE                  Interoffice Transport (Per                                   
                           Airline Mile)                             MRC      Yes         Yes          $10.00     $1.36       $8.64
                                                                                                                    N/A
TX  GTE                    Termination Charge (Per Termination)      MRC      Yes         Yes         $100.00    $13.63      $86.37
TX  GTE     8              Termination Charge (Per Termination)      NRC      Yes         No          $300.00       N/A     $300.00
                                                                                        
            9          FRAME RELAY SERVICE                                              
                                    MONTH TO MONTH RATES                          
                           Frame Relay Service                                          
TX  GTE                       w/56 kbps Access Line                  MRC      Yes         Yes          $95.00    $12.95      $82.05
TX  GTE                       w/56 kbps Access Line                  NRC      Yes         No           $95.00       N/A      $95.00
                           Frame Relay Service                                          
TX  GTE                       w/o 56 kbps Access Line                MRC      Yes         Yes          $20.00     $2.73      $17.27
TX  GTE                       w/o 56 kbps Access Line                NRC      Yes         No           $95.00       N/A      $95.00
                           Frame Relay Service                                          
TX  GTE                       w/128 kbps Access Line                 MRC      Yes         Yes         $150.00    $20.45     $129.56

</TABLE>
<PAGE>   162
                     GTE TELEPHONE OPERATIONS HEADQUARTERS
                  RESALE PRODUCTS & SERVICES - STATE OF TEXAS
                           GTE SOUTHWEST INCORPORATED

<TABLE>
<CAPTION>
                                                                        
                LOCAL                                            BILLING     RESALE     DISCOUNT    RETAIL    AVOIDED     RESALE
 ST    CO       TARIFF       SERVICE DESCRIPTION                  TYPE      POSITION    POSITION     RATE      COST        RATE
 --    --       ------       -------------------                 -------    --------    --------    ------    -------     ------
<S>   <C>     <C>        <C>                                     <C>         <C>          <C>     <C>         <C>      <C>
 TX    GTE                  w/128 kbps Access Line                  NRC        Yes         No      $250.00       N/A     $250.00
                           Frame Relay Service                                                  
 TX    GTE                  w/o 128 kbps Access Line                MRC        Yes         Yes      $40.00     $5.45      $34.55
 TX    GTE                  w/o 128 kbps Access Line                NRC        Yes         No      $250.00       N/A     $250.00
                             Frame Relay Service                                                
 TX    GTE                  w/256 kbps Access Line                  MRC        Yes         Yes     $250.00    $34.08     $215.93
 TX    GTE                  w/256 kbps Access Line                  NRC        Yes         No      $250.00       N/A     $250.00
                           Frame Relay Service                                                   
 TX    GTE                  w/o 256 kbps Access Line                MRC        Yes         Yes      $60.00     $8.18      $51.82
 TX    GTE                  w/o 256 kbps Access Line                NRC        Yes         No      $250.00       N/A     $250.00
                            Frame Relay Service                                                  
 TX    GTE                  w/384 kbps Access Line                  MRC        Yes         Yes     $350.00    $47.71     $302.30
 TX    GTE                  w/384 kbps Access Line                  NRC        Yes         No      $250.00       N/A     $250.00
                           Frame Relay Service                                                   
 TX    GTE                  w/o 384 kbps Access Line                MRC        Yes         Yes      $80.00    $10.90      $69.10
 TX    GTE                  w/o 384 kbps Access Line                NRC        Yes         No      $250.00       N/A     $250.00
                           Frame Relay Service                                                   
 TX    GTE                  w/1.544 kbps Access Line                MRC        Yes         Yes     $500.00    $68.15     $431.85
 TX    GTE                  w/1.544 kbps Access Line                NRC        Yes         No      $250.00       N/A     $250.00
                           Frame Relay Service                                                   
 TX    GTE                  w/o 1.544 kbps Access Line              MRC        Yes         Yes     $400.00    $54.52     $345.48
 TX    GTE                  w/o 1.544 kbps Access Line              NRC        Yes         No      $250.00       N/A     $250.00
                           PERMANENT VIRTUAL CONNECTIONS                                         
 TX    GTE                  2-10                                    MRC        Yes         Yes       $8.00     $1.09       $6.91
 TX    GTE                  2-10                                    NRC        Yes         No       $10.00       N/A      $10.00
 TX    GTE                  11-20                                   MRC        Yes         Yes       $7.00     $0.95       $6.05
 TX    GTE                  11-20                                   NRC        Yes         No       $10.00       N/A      $10.00
 TX    GTE                  21+                                     MRC        Yes         Yes       $6.00     $0.82       $5.18
 TX    GTE                  21+                                     NRC        Yes         No       $10.00       N/A      $10.00
                                                                                                 
                                       TWELVE MONTH CONTRACT                                     
                           Frame Relay Service                                                   
 TX    GTE                  w/56 kbps Access Line                   MRC        Yes         Yes      $90.00    $12.27      $77.73
 TX    GTE                  w/56 kbps Access Line                   NRC        Yes         No       $95.00       N/A      $95.00
                           Frame Relay Service                                                   
</TABLE>                                                      


<PAGE>   163
                     GTE TELEPHONE OPERATIONS HEADQUARTERS
                  RESALE PRODUCTS & SERVICES - STATE OF TEXAS
                           GTE SOUTHWEST INCORPORATED

<TABLE>
<CAPTION>
                LOCAL                                            BILLING     RESALE     DISCOUNT    RETAIL     AVOIDED     RESALE
 ST    CO       TARIFF       SERVICE DESCRIPTION                  TYPE      POSITION    POSITION     RATE       COST        RATE
 --    --       ------       -------------------                 -------    --------    --------    ------     -------     ------
<S>   <C>     <C>        <C>                                     <C>       <C>          <C>      <C>        <C>        <C>

 TX    GTE                   w/o 56 kbps Access Line              MRC         Yes          Yes       $15.00     $2.04      $12.96
 TX    GTE                   w/o 56 kbps Access Line              NRC         Yes          No        $95.00       N/A      $95.00
                          Frame Relay Service                                                   
 TX    GTE                   w/128 kbps Access Line               MRC         Yes          Yes      $145.00    $19.76     $125.24
 TX    GTE                   w/128 kbps Access Line               NRC         Yes          No       $250.00       N/A     $250.00
                          Frame Relay Service                                                   
 TX    GTE                   w/o 128 kbps Access Line             MRC         Yes          Yes       $35.00     $4.77      $30.23
 TX    GTE                   w/o 128 kbps Access Line             NRC         Yes          No       $250.00       N/A     $250.00
                          Frame Relay Service                                                   
 TX    GTE                   w/256 kbps Access Line               MRC         Yes          Yes      $245.00    $33.39     $211.61
 TX    GTE                   w/256 kbps Access Line               NRC         Yes          No       $250.00       N/A     $250.00
                          Frame Relay Service                                                   
 TX    GTE                   w/o 256 kbps Access Line             MRC         Yes          Yes       $55.00     $7.50      $47.50
 TX    GTE                   w/o 256 kbps Access Line             NRC         Yes          No       $250.00       N/A     $250.00
                          Frame Relay Service                                                   
 TX    GTE                   w/384 kbps Access Line               MRC         Yes          Yes      $345.00    $47.02     $297.98
 TX    GTE                   w/384 kbps Access Line               NRC         Yes          No       $250.00       N/A     $250.00
                          Frame Relay Service                                                   
 TX    GTE                   w/o 384 kbps Access Line             MRC         Yes          Yes       $75.00    $10.22      $64.78
 TX    GTE                   w/o 384 kbps Access Line             NRC         Yes          No       $250.00       N/A     $250.00
                           Frame Relay Service                                                  
 TX    GTE                   w/1.544 kbps Access Line             MRC         Yes          Yes      $465.00    $63.38     $401.62
 TX    GTE                   w/1.544 kbps Access Line             NRC         Yes          No       $250.00       N/A     $250.00
                          Frame Relay Service                                                   
 TX    GTE                   w/o 1.544 kbps Access Line           MRC         Yes          Yes      $375.00    $51.11     $323.89
 TX    GTE                   w/o 1.544 kbps Access Line           NRC         Yes          No       $250.00       N/A     $250.00
                          PERMANENT VIRTUAL CONNECTIONS                                         
 TX    GTE                   2-10                                 MRC         Yes          Yes        $8.00     $1.09       $6.91
 TX    GTE                   2-10                                 NRC         Yes          No        $10.00       N/A      $10.00
 TX    GTE                   11-20                                MRC         Yes          Yes        $7.00     $0.95       $6.05
 TX    GTE                   11-20                                NRC         Yes          No        $10.00       N/A      $10.00
 TX    GTE                   21+                                  MRC         Yes          Yes        $6.00     $0.82       $5.18
 TX    GTE                   21+                                  NRC         Yes          No        $10.00       N/A      $10.00
                                    THIRTY-SIX MONTH CONTRACT
</TABLE>             

<PAGE>   164
                     GTE TELEPHONE OPERATIONS HEADQUARTERS
                  RESALE PRODUCTS & SERVICES - STATE OF TEXAS
                           GTE SOUTHWEST INCORPORATED

<TABLE>
<CAPTION>
                LOCAL                                            BILLING     RESALE     DISCOUNT     RETAIL    AVOIDED     RESALE
 ST    CO       TARIFF       SERVICE DESCRIPTION                  TYPE      POSITION    POSITION      RATE      COST        RATE
 --    --       ------       -------------------                 -------    --------    --------     ------    -------     ------
<S>   <C>     <C>        <C>                                     <C>       <C>          <C>      <C>        <C>        <C>

                           Frame Relay Service                    
 TX    GTE                    w/56 kbps Access Line               MRC         Yes          Yes       $85.00    $11.59      $73.41
 TX    GTE                    w/56 kbps Access Line               NRC         Yes          No        $95.00       N/A      $95.00
                           Frame Relay Service                                                  
 TX    GTE                    w/o 56 kbps Access Line             MRC         Yes          Yes       $12.00     $1.64      $10.36
 TX    GTE                    w/o 56 kbps Access Line             NRC         Yes          No        $95.00       N/A      $95.00
                           Frame Relay Service                                                  
 TX    GTE                    w/128 kbps Access Line              MRC         Yes          Yes      $135.00    $18.40     $116.60
 TX    GTE                    w/128 kbps Access Line              NRC         Yes          No       $250.00       N/A     $250.00
                           Frame Relay Service                                                  
 TX    GTE                    w/o 128 kbps Access Line            MRC         Yes          Yes       $30.00     $4.09      $25.91
 TX    GTE                    w/o 128 kbps Access Line            NRC         Yes          No       $250.00       N/A     $250.00
                           Frame Relay Service                                                  
 TX    GTE                    w/256 kbps Access Line              MRC         Yes          Yes      $235.00    $32.03     $202.97
 TX    GTE                    w/256 kbps Access Line              NRC         Yes          No       $250.00       N/A     $250.00
                           Frame Relay Service                                                  
 TX    GTE                    w/o 256 kbps Access Line            MRC         Yes          Yes       $50.00     $6.82      $43.19
 TX    GTE                    w/o 256 kbps Access Line            NRC         Yes          No       $250.00       N/A     $250.00
       GTE                 Frame Relay Service                                                  
 TX    GTE                    w/384 kbps Access Line              MRC         Yes          Yes      $335.00    $45.66     $289.34
 TX    GTE                    w/384 kbps Access Line              NRC         Yes          No       $250.00       N/A     $250.00
                           Frame Relay Service                                                                    N/A
 TX    GTE                    w/o 384 kbps Access Line            MRC         Yes          Yes       $70.00     $9.54      $60.46
 TX    GTE                    w/o 384 kbps Access Line            NRC         Yes          No       $250.00       N/A     $250.00
                           Frame Relay Service                                                                    N/A
 TX    GTE                    w/1.544 kbps Access Line            MRC         Yes          Yes      $435.00    $59.29     $375.71
                                                                                                
 TX    GTE                    w/1.544 kbps Access Line            NRC         Yes          No       $250.00       N/A     $250.00
                           Frame Relay Service                                                                    N/A
 TX    GTE                    w/o 1.544 kbps Access Line          MRC         Yes          Yes      $375.00    $51.11     $323.89
 TX    GTE                    w/o 1.544 kbps Access Line          NRC         Yes          No       $250.00       N/A     $250.00
                           PERMANENT VIRTUAL CONNECTIONS                                                          N/A
 TX    GTE                    2-10                                MRC         Yes          Yes        $8.00     $1.09       $6.91
 TX    GTE                    2-10                                NRC         Yes          No        $10.00       N/A      $10.00
 TX    GTE                    11-20                               MRC         Yes          Yes        $7.00     $0.95       $6.05
 TX    GTE                    11-20                               NRC         Yes          No        $10.00       N/A      $10.00
</TABLE>

<PAGE>   165
                     GTE TELEPHONE OPERATIONS HEADQUARTERS
                  RESALE PRODUCTS & SERVICES - STATE OF TEXAS
                           GTE SOUTHWEST INCORPORATED

<TABLE>
<CAPTION>
                LOCAL                                            BILLING     RESALE     DISCOUNT      RETAIL    AVOIDED     RESALE
 ST    CO       TARIFF       SERVICE DESCRIPTION                  TYPE      POSITION    POSITION       RATE      COST        RATE
 --    --       ------       -------------------                 -------    --------    --------      ------    -------     ------
<S>   <C>     <C>        <C>                                     <C>       <C>          <C>         <C>        <C>        <C>

 TX    GTE                    21+                                 MRC         Yes          Yes         $6.00     $0.82       $5.18
 TX    GTE        9           21+                                 NRC         Yes          No         $10.00       N/A      $10.00
                                  SIXTY MONTH CONTRACT                                           
                           Frame Relay Service                                                   
 TX    GTE                    w/56 kbps Access Line               MRC         Yes          Yes        $75.00    $10.22      $64.78
 TX    GTE                    w/56 kbps Access Line               NRC         Yes          No         $95.00       N/A      $95.00
                           Frame Relay Service                                                   
 TX    GTE                    w/o 56 kbps Access Line             MRC         Yes          Yes        $10.00     $1.36       $8.64
 TX    GTE                    w/o 56 kbps Access Line             NRC         Yes          No         $95.00       N/A      $95.00
                           Frame Relay Service                                                   
 TX    GTE                    w/128 kbps Access Line              MRC         Yes          Yes       $120.00    $16.36     $103.64
 TX    GTE                    w/128 kbps Access Line              NRC         Yes          No        $250.00       N/A     $250.00
                           Frame Relay Service                                                   
 TX    GTE                    w/o 128 kbps Access Line            MRC         Yes          Yes        $20.00     $2.73      $17.27
 TX    GTE                    w/o 128 kbps Access Line            NRC         Yes          No        $250.00       N/A     $250.00
                           Frame Relay Service                                                   
 TX    GTE                    w/256 kbps Access Line              MRC         Yes          Yes       $220.00    $29.99     $190.01
 TX    GTE                    w/256 kbps Access Line              NRC         Yes          No        $250.00       N/A     $250.00
                           Frame Relay Service                                                   
 TX    GTE                    w/o 256 kbps Access Line            MRC         Yes          Yes        $40.00     $5.45      $34.55
 TX    GTE                    w/o 256 kbps Access Line            NRC         Yes          No        $250.00       N/A     $250.00
                           Frame Relay Service                                                   
 TX    GTE                    w/384 kbps Access Line              MRC         Yes          Yes       $320.00    $43.62     $276.38
 TX    GTE                    w/384 kbps Access Line              NRC         Yes          No        $250.00       N/A     $250.00
                           Frame Relay Service                                                   
 TX    GTE                    w/o 384 kbps Access Line            MRC         Yes          Yes        $60.00     $8.18      $51.82
 TX    GTE                    w/o 384 kbps Access Line            NRC         Yes          No        $250.00       N/A     $250.00
                           Frame Relay Service                                                   
 TX    GTE                    w/1.544 kbps Access Line            MRC         Yes          Yes       $400.00    $54.52     $345.48
 TX    GTE                    w/1.544 kbps Access Line            NRC         Yes          No        $250.00       N/A     $250.00
                           Frame Relay Service                                                   
 TX    GTE                    w/o 1.544 kbps Access Line          MRC         Yes          Yes       $350.00    $47.71     $302.30
 TX    GTE                    w/o 1.544 kbps Access Line          NRC         Yes          No        $250.00       N/A     $250.00
                           PERMANENT VIRTUAL CONNECTIONS          
</TABLE>
 
<PAGE>   166
                     GTE TELEPHONE OPERATIONS HEADQUARTERS
                  RESALE PRODUCTS & SERVICES - STATE OF TEXAS
                           GTE SOUTHWEST INCORPORATED

<TABLE>
<CAPTION>
          LOCAL                                                       BILLING     RESALE     DISCOUNT    RETAIL    AVOIDED   RESALE
ST   CO   TARIFF    SERVICE DESCRIPTION                                TYPE      POSITION    POSITION     RATE      COST      RATE 
- --   --   ------    -------------------                               -------    --------    --------    ------    -------   ------
<S>  <C>  <C>   <C>                                                  <C>         <C>          <C>        <C>      <C>        <C>   
TX   GTE                  2-10                                          MRC        Yes          Yes       $8.00     $1.09     $6.91
TX   GTE                  2-10                                          NRC        Yes          No       $10.00       N/A    $10.00
TX   GTE                  11-20                                         MRC        Yes          Yes       $7.00     $0.95     $6.05
TX   GTE                  11-20                                         NRC        Yes          No       $10.00       N/A    $10.00
TX   GTE                  21+                                           MRC        Yes          Yes       $6.00     $0.82     $5.18
TX   GTE    9             21+                                           NRC        Yes          No       $10.00       N/A    $10.00
                   GTESW TOLL TARIFFS
                1  GTE Long Distance Telecommunications Services:
                   IntraLata Two Point Service:
                     Day Rate:                                                                                                     
                        Initial Minute:                                                                                            
TX   GTE                  1 to 17 Miles                                USAGE       Yes          Yes       $0.10   $0.0136     $0.09
TX   GTE                  18 to 22 Miles                               USAGE       Yes          Yes       $0.15   $0.0204     $0.13
TX   GTE                  23 to 28 Miles                               USAGE       Yes          Yes       $0.21   $0.0286     $0.18
TX   GTE                  29 to 34 Miles                               USAGE       Yes          Yes       $0.25   $0.0341     $0.22
TX   GTE                  35 to 41 Miles                               USAGE       Yes          Yes       $0.31   $0.0423     $0.27
TX   GTE                  42 to 51 Miles                               USAGE       Yes          Yes       $0.37   $0.0504     $0.32
TX   GTE                  52 to 66 Miles                               USAGE       Yes          Yes       $0.41   $0.0559     $0.35
TX   GTE                  67 to 81 Miles                               USAGE       Yes          Yes       $0.44   $0.0600     $0.38
TX   GTE                  82 to 105 Miles                              USAGE       Yes          Yes       $0.46   $0.0627     $0.40
TX   GTE                  Over 105 Miles                               USAGE       Yes          Yes       $0.49   $0.0668     $0.42
                        Each Additioanl Minute:                                                                                    
TX   GTE                  1 to 17 Miles                                USAGE       Yes          Yes       $0.08   $0.0109     $0.07
TX   GTE                  18 to 22 Miles                               USAGE       Yes          Yes       $0.12   $0.0164     $0.10
TX   GTE                  23 to 28 Miles                               USAGE       Yes          Yes       $0.18   $0.0245     $0.16
TX   GTE                  29 to 34 Miles                               USAGE       Yes          Yes       $0.24   $0.0327     $0.21
TX   GTE                  35 to 41 Miles                               USAGE       Yes          Yes       $0.31   $0.0423     $0.27
TX   GTE                  42 to 51 Miles                               USAGE       Yes          Yes       $0.36   $0.0491     $0.31
TX   GTE                  52 to 66 Miles                               USAGE       Yes          Yes       $0.40   $0.0545     $0.35
TX   GTE                  67 to 81 Miles                               USAGE       Yes          Yes       $0.43   $0.0586     $0.37
TX   GTE                  82 to 105 Miles                              USAGE       Yes          Yes       $0.45   $0.0613     $0.39
TX   GTE                  Over 105 Miles                               USAGE       Yes          Yes       $0.47   $0.0641     $0.41
                     Evening Rate:                                                                              
                         Initial Minute:                                                                        
                                                                                                                      
</TABLE>        
                
<PAGE>   167
                     GTE TELEPHONE OPERATIONS HEADQUARTERS
                  RESALE PRODUCTS & SERVICES - STATE OF TEXAS
                           GTE SOUTHWEST INCORPORATED


<TABLE>
<CAPTION>
                LOCAL                                      BILLING     RESALE     DISCOUNT     RETAIL    AVOIDED   RESALE
 ST    CO       TARIFF       SERVICE DESCRIPTION            TYPE      POSITION    POSITION      RATE      COST      RATE
 --    --       ------       -------------------           -------    --------    --------     ------    -------   ------
<S>   <C>     <C>        <C>                               <C>       <C>          <C>      <C>        <C>        <C>
                                                         
                                                         
TX    GTE                         1 to 17 Miles             USAGE       Yes          Yes      $0.08     $0.0109    $0.07
TX    GTE                         18 to 22 Miles            USAGE       Yes          Yes      $0.11     $0.0150    $0.10
TX    GTE                         23 to 28 Miles            USAGE       Yes          Yes      $0.16     $0.0218    $0.14
TX    GTE                         29 to 34 Miles            USAGE       Yes          Yes      $0.19     $0.0259    $0.16
TX    GTE                         35 to 41 Miles            USAGE       Yes          Yes      $0.23     $0.0313    $0.20
TX    GTE                         42 to 51 Miles            USAGE       Yes          Yes      $0.28     $0.0382    $0.24
TX    GTE                         52 to 66 Miles            USAGE       Yes          Yes      $0.31     $0.0423    $0.27
TX    GTE                         67 to 81 Miles            USAGE       Yes          Yes      $0.33     $0.0450    $0.29
TX    GTE                         82 to 105 Miles           USAGE       Yes          Yes      $0.35     $0.0477    $0.30
TX    GTE                         Over 105 Miles            USAGE       Yes          Yes      $0.37     $0.0504    $0.32
TX    GTE                      Each Additional Minute:                                                             
TX    GTE                         1 to 17 Miles             USAGE       Yes          Yes      $0.06     $0.0082    $0.05
TX    GTE                         18 to 22 Miles            USAGE       Yes          Yes      $0.09     $0.0123    $0.08
TX    GTE                         23 to 28 Miles            USAGE       Yes          Yes      $0.14     $0.0191    $0.12
TX    GTE                         29 to 34 Miles            USAGE       Yes          Yes      $0.18     $0.0245    $0.16
TX    GTE                         35 to 41 Miles            USAGE       Yes          Yes      $0.23     $0.0313    $0.20
TX    GTE                         42 to 51 Miles            USAGE       Yes          Yes      $0.27     $0.0368    $0.23
TX    GTE                         52 to 66 Miles            USAGE       Yes          Yes      $0.30     $0.0409    $0.26
TX    GTE                         67 to 81 Miles            USAGE       Yes          Yes      $0.32     $0.0436    $0.28
TX    GTE                         82 to 105 Miles           USAGE       Yes          Yes      $0.34     $0.0463    $0.29
TX    GTE                         Over 105 Miles            USAGE       Yes          Yes      $0.35     $0.0477    $0.30
                           Night/Weekend Rate:                                                                     
                               Initial Minute:                                                                     
TX    GTE                         1 to 17 Miles             USAGE       Yes          Yes      $0.06     $0.0082    $0.05
TX    GTE                         18 to 22 Miles            USAGE       Yes          Yes      $0.09     $0.0123    $0.08
TX    GTE                         23 to 28 Miles            USAGE       Yes          Yes      $0.13     $0.0177    $0.11
TX    GTE                         29 to 34 Miles            USAGE       Yes          Yes      $0.15     $0.0204    $0.13
TX    GTE                         35 to 41 Miles            USAGE       Yes          Yes      $0.19     $0.0259    $0.16
TX    GTE                         42 to 51 Miles            USAGE       Yes          Yes      $0.22     $0.0300    $0.19
TX    GTE                         52 to 66 Miles            USAGE       Yes          Yes      $0.25     $0.0341    $0.22
TX    GTE                         67 to 81 Miles            USAGE       Yes          Yes      $0.26     $0.0354    $0.22
TX    GTE                         82 to 105 Miles           USAGE       Yes          Yes      $0.28     $0.0382    $0.24
TX    GTE                         Over 105 Miles            USAGE       Yes          Yes      $0.29     $0.0395    $0.25
                               Each Additional Minute:                                                 
TX    GTE                         1 to 17 Miles             USAGE       Yes          Yes      $0.05     $0.0068    $0.04
     
</TABLE>
     
     
     
     
     
     
     
     
     
     
     
     
     
     
     
     
     
     
     
     
     
     
     
     
     
     
     
     
     
     
     
     
<PAGE>   168
                     GTE TELEPHONE OPERATIONS HEADQUARTERS
                  RESALE PRODUCTS & SERVICES - STATE OF TEXAS
                           GTE SOUTHWEST INCORPORATED

<TABLE>
<CAPTION>
          LOCAL                                                      BILLING     RESALE      DISCOUNT   RETAIL    AVOIDED  RESALE
ST   CO   TARIFF           SERVICE DESCRIPTION                        TYPE      POSITION     POSITION    RATE      COST     RATE 
- --   --   ------           -------------------                       -------    --------     --------   ------    ------   ------
<S>  <C> <C>      <C>                                                <C>         <C>        <C>         <C>      <C>        <C>  
TX   GTE                  18 to 22 Miles                              USAGE       Yes           Yes      $0.07   $0.0095    $0.06
TX   GTE                  23 to 28 Miles                              USAGE       Yes           Yes      $0.11   $0.0150    $0.10
TX   GTE                  29 to 34 Miles                              USAGE       Yes           Yes      $0.14   $0.0191    $0.12
TX   GTE                  35 to 41 Miles                              USAGE       Yes           Yes      $0.19   $0.0259    $0.16
TX   GTE                  42 to 51 Miles                              USAGE       Yes           Yes      $0.22   $0.0300    $0.19
TX   GTE                  52 to 66 Miles                              USAGE       Yes           Yes      $0.24   $0.0327    $0.21
TX   GTE                  67 to 81 Miles                              USAGE       Yes           Yes      $0.26   $0.0354    $0.22
TX   GTE                  82 to 105 Miles                             USAGE       Yes           Yes      $0.27   $0.0368    $0.23
TX   GTE                  Over 105 Miles                              USAGE       Yes           Yes      $0.28   $0.0382    $0.24
TX   GTE           Service Charge - Dial Calling Card -                                                                          
                          Station to Station                          USAGE       Yes           No       $0.40       N/A    $0.40
TX   GTE           Service Charge - Operator - Station to Station     USAGE       Yes           No       $1.15       N/A    $1.15
TX   GTE           Service Charge - Person to Person                  USAGE       Yes           No       $2.80       N/A    $2.80
TX   GTE           Service Charge - Line Status Verification          USAGE       Yes           No       $1.35       N/A    $1.35
TX   GTE           Service Charge - Busy Interrupt                    USAGE       Yes           No       $2.20       N/A    $2.20
TX   GTE           Service Charge - Directory Assistance              USAGE       Yes           No       $0.30       N/A    $0.30
TX   GTE           Service Charge - Operator Completed                                                                           
                          Directory Assistance                        USAGE       Yes           No       $0.60       N/A    $0.60
                                                                                                                                 
TX   GTE           Enterprise Service                                  MRC        Yes           Yes      $3.20     $0.44    $2.76
                  Conference Connection Services (CCS):                                                                          
                    Unassisted CCS:                                                                                              
                       Standard Rate Period:                                                                                     
TX   GTE                  First 15 Minutes (per port, per minute)     USAGE       Yes           Yes      $0.50   $0.0682    $0.43
TX   GTE                  Each Additional Minute (per port)           USAGE       Yes           Yes      $0.08   $0.0109    $0.07
                       Economy Rate Period:                                                                                      
TX   GTE                  First 15 Minutes (per port, per minute)     USAGE       Yes           Yes      $0.36   $0.0491    $0.31
TX   GTE                  Each Additional Minute (per port)           USAGE       Yes           Yes      $0.06   $0.0082    $0.05
                   Operator Assisted CCS:                                                                                        
                       Standard Rate Period:                                                                                     
TX   GTE                  First 15 Minutes (per port, per minute)     USAGE       Yes           Yes      $0.66   $0.0900    $0.57
TX   GTE                  Each Additional Minute (per port)           USAGE       Yes           Yes      $0.08   $0.0109    $0.07
                       Economy Rate Period:                                
</TABLE>                                                               
<PAGE>   169
                     GTE TELEPHONE OPERATIONS HEADQUARTERS
                  RESALE PRODUCTS & SERVICES - STATE OF TEXAS
                           GTE SOUTHWEST INCORPORATED

<TABLE>
<CAPTION>
           LOCAL                                                       BILLING     RESALE     DISCOUNT    RETAIL   AVOIDED    RESALE
ST   CO    TARIFF     SERVICE DESCRIPTION                               TYPE      POSITION    POSITION     RATE     COST       RATE 
- --   --    ------     -------------------                              -------    --------    --------    ------   -------    ------
<S>  <C>  <C>      <C>                                                 <C>        <C>           <C>     <C>       <C>       <C>     
TX   GTE                    First 15 Minutes (per port, per minute)     USAGE       Yes          Yes       $0.46   $0.0627     $0.40
TX   GTE                    Each Additional Minute (per port)           USAGE       Yes          Yes       $0.06   $0.0082     $0.05
TX   GTE             Broadcast Conference (per port, per minute)        USAGE       Yes          Yes       $0.08   $0.0109     $0.07
                     Supplemental CCS Services:                                                                                     
                         Notification (per participant notified):                                                                   
TX   GTE                    U.S., Canada, Caribbean, Mexico             USAGE       Yes          Yes       $1.70   $0.2317     $1.47
TX   GTE                    Other International                         USAGE       Yes          Yes      $11.00   $1.4993     $9.50
                         Monitoring (per call):                                                                                     
TX   GTE                    Each 15 Minute Period                       USAGE       Yes          Yes      $15.00   $2.0445    $12.96
TX   GTE                 Dial Out Operator Assistance (per port)        USAGE       Yes          Yes       $3.00   $0.4089     $2.59
                         Tape Recording:                                                                                            
TX   GTE                    Regular Mail (per 90 minute tape)           USAGE       Yes          Yes       $5.00    $06815     $4.32
TX   GTE                    Express Mail (domestic)                     USAGE       Yes          Yes      $10.00   $1.3630     $8.64
TX   GTE                    Express Mail (international)                USAGE       Yes          Yes       $5.00    $06815     $4.32
                         Time and Charges (per call):                                                                               
TX   GTE                    U.S., Canada, Caribbean, Mexico             USAGE       Yes          Yes       $5.00    $06815     $4.32
TX   GTE                    Other International                         USAGE       Yes          Yes      $15.00   $2.0445    $12.96
TX   GTE                 Polling                                        USAGE       Yes          Yes      $40.00   $5.4520    $34.55
TX   GTE                 Question and Answer                            USAGE       Yes          Yes      $50.00   $6.8150    $43.19
             2       IntraLATA Optional Toll Calling Plans: LATAwide                                                                
                     Calling:                                                                                                       
                         Residence:                                                                                                 
                            Discount Plan:                                                                                          
TX   GTE                       15% Discount                              MRC        Yes          Yes       $3.00     $0.41     $2.59
TX   GTE                       Service Charge                            NRC        Yes          No        $5.00       N/A     $5.00
                            Block of Time Plan:                                                                                     
TX   GTE                       Monthly Rate for First Hour              USAGE       Yes          Yes      $10.80   $1.4720     $9.33
TX   GTE                       Additinal Hour                           USAGE       Yes          Yes      $10.00   $1.3630     $8.64
TX   GTE                       Service Charge                            NRC        Yes          No        $5.00       N/A     $5.00
                         Business:                                                                               
                            Discount Plan:                                                                       
</TABLE>

<PAGE>   170
                     GTE TELEPHONE OPERATIONS HEADQUARTERS
                  RESALE PRODUCTS & SERVICES - STATE OF TEXAS
                           GTE SOUTHWEST INCORPORATED
<TABLE>
<CAPTION>
           LOCAL                                                     BILLING    RESALE     DISCOUNT     RETAIL     AVOIDED    RESALE
ST    CO   TARIFF     SERVICE DESCRIPTION                             TYPE     POSITION    POSITION      RATE       COST       RATE 
- --    --   ------     -------------------                            -------   --------    --------     ------     -------    ------
<S>   <C>  <C>     <C>                                                 <C>        <C>      <C>         <C>       <C>        <C>   
TX    GTE                        10% Discount                          MRC        Yes         Yes        $3.00     $0.41      $2.59 
TX    GTE                        Service Charge                        NRC        Yes         No         $5.00       N/A      $5.00 
                              Discount Plan:                                                                                        
TX    GTE                        15% Discount                          MRC        Yes         Yes        $8.00     $1.09      $6.91 
TX    GTE                        Service Charge                        NRC        Yes         No         $5.00       N/A      $5.00 
                              Discount Plan:                                                                                        
TX    GTE                        20% Discount                          MRC        Yes         Yes       $20.00     $2.73     $17.27 
TX    GTE                        Service Charge                        NRC        Yes         No         $5.00       N/A      $5.00 
             5     Wide Area Telecommunications Services:                                                                           
                       800 Service:                                                                                                 
TX    GTE                  Access Line                                 MRC        Yes         Yes       $40.50     $5.52     $34.98 
TX    GTE                  Service Charge - Installation or Move       NRC        Yes         No       $119.00       N/A    $119.00 
TX    GTE                  Service Charge - Number Change              NRC        Yes         No        $60.00       N/A     $60.00 
                           Usage Rates (per Hour):                                                                                  
TX    GTE                     Day - First 15 Hours                    USAGE       Yes         Yes       $18.00   $2.4534     $15.55 
TX    GTE                     Day - Next 25 Hours                     USAGE       Yes         Yes       $16.20   $2.2081     $13.99 
TX    GTE                     Day - Next 40 Hours                     USAGE       Yes         Yes       $14.58   $1.9873     $12.59 
TX    GTE                     Day - Over 80 Hours                     USAGE       Yes         Yes       $13.12   $1.7883     $11.33 
TX    GTE                     Evening- First 15 Hours                 USAGE       Yes         Yes       $13.50   $1.8401     $11.66 
TX    GTE                     Evening - Next 25 Hours                 USAGE       Yes         Yes       $12.15   $1.6560     $10.49 
TX    GTE                     Evening - Next 40 Hours                 USAGE       Yes         Yes       $10.94   $1.4911      $9.45 
TX    GTE                     Evening - Over 80 Hours                 USAGE       Yes         Yes        $9.84   $1.3412      $8.50 
TX    GTE                     Night/Weekend - First 15 Hours          USAGE       Yes         Yes       $10.80   $1.4720      $9.33 
TX    GTE                     Night/Weekend - Next 25 Hours           USAGE       Yes         Yes        $9.72   $1.3248      $8.40 
TX    GTE                     Night/Weekend - Next 40 Hours           USAGE       Yes         Yes        $8.75   $1.1926      $7.56 
TX    GTE                     Night/Weekend - Over 80 Hours           USAGE       Yes         Yes        $7.87   $1.0727      $6.80 
                       Outward WATS:                                                                                                
TX    GTE                  Access Line                                 MRC        Yes         Yes       $40.50     $5.52     $34.98 
TX    GTE                  Service Charge - Installation or Move       NRC        Yes         No       $119.00       N/A    $119.00 
</TABLE>                                                                     

<PAGE>   171

                    GTE TELEPHONE OPERATIONS HEADQUARTERS
                 RESALE PRODUCTS & SERVICES - STATE OF TEXAS
                          GTE SOUTHWEST INCORPORATED
<TABLE>
<CAPTION>
          LOCAL                                                   BILLING    RESALE     DISCOUNT    RETAIL     AVOIDED    RESALE   
ST   CO   TARIFF          SERVICE DESCRIPTION                       TYPE     POSITION   POSITION     RATE       COST       RATE    
- --   --   ------          -------------------                       ----     --------   --------     ----       ----       ----    
<S>  <C>  <C>     <C>                                              <C>         <C>          <C>    <C>         <C>          <C>    
TX   GTE              Service Charge - Number Change                NRC        Yes          No      $60.00         N/A      $60.00 
                      Usage Rates (per Hour):                                                                                      
TX   GTE                 Day - First 15 Hours                      USAGE       Yes          Yes     $13.50     $1.8401      $11.66 
TX   GTE                 Day - Next 25 Hours                       USAGE       Yes          Yes     $12.15     $1.6560      $10.49 
TX   GTE                 Day - Next 40 Hours                       USAGE       Yes          Yes     $10.94     $1.4911       $9.45 
TX   GTE                 Day - Over 80 Hours                       USAGE       Yes          Yes      $9.85     $1.3426       $8.51 
TX   GTE                 Evening- First 15 Hours                   USAGE       Yes          Yes     $10.13     $1.3807       $8.75 
TX   GTE                 Evening - Next 25 Hours                   USAGE       Yes          Yes      $9.12     $1.2431       $7.88 
TX   GTE                 Evening - Next 40 Hours                   USAGE       Yes          Yes      $8.21     $1.1190       $7.09 
TX   GTE                 Evening - Over 80 Hours                   USAGE       Yes          Yes      $7.39     $1.0073       $6.38 
TX   GTE                 Night/Weekend - First 15 Hours            USAGE       Yes          Yes      $8.10     $1.1040       $7.00 
TX   GTE                 Night/Weekend - Next 25 Hours             USAGE       Yes          Yes      $7.29     $0.9936       $6.30 
TX   GTE                 Night/Weekend - Next 40 Hours             USAGE       Yes          Yes      $6.56     $0.8941       $5.67 
TX   GTE                 Night/Weekend - Over 80 Hours             USAGE       Yes          Yes      $5.90     $0.8042       $5.10 
                  Business Line 800/Residence Line 800:                                                                            
TX   GTE          Access Line Initial                               MRC        Yes          Yes      $5.00     $  0.68       $4.32 
TX   GTE          Access Line Initial                               NRC        Yes          No       $8.00         N/A       $8.00 
TX   GTE          Access Line Subsequent                            MRC        Yes          Yes      $5.00     $  0.68       $4.32 
TX   GTE          Access Line Subsequent                            NRC        Yes          No       $8.00         N/A       $8.00 
TX   GTE          Variable Call Destination (per location)          MRC        Yes          Yes      $2.00     $  0.27       $1.73 
TX   GTE          Variable Call Destination (per location)          NRC        Yes          No       $8.00         N/A       $8.00 
                  Usage Rates (per hour):                                                                                          
                      Month-to-Month (No Contract):                                                                                
TX   GTE                 First 10 Hours                            USAGE       Yes          Yes     $11.00     $1.4993       $9.50 
TX   GTE                 Over 10 Hours                             USAGE       Yes          Yes      $9.90     $1.3494       $8.55 
                      One Year Contract:                                                                                           
TX   GTE                 First 10 Hours                            USAGE       Yes          Yes     $10.13     $1.3807       $8.75 
TX   GTE                 Over 10 Hours                             USAGE       Yes          Yes      $9.00     $1.2267       $7.77 

</TABLE>

<PAGE>   172
                     GTE TELEPHONE OPERATIONS HEADQUARTERS
                  RESALE PRODUCTS & SERVICES - STATE OF TEXAS
                           GTE SOUTHWEST INCORPORATED


<TABLE>
<CAPTION>
           LOCAL                                                    BILLING     RESALE     DISCOUNT    RETAIL    AVOIDED   RESALE  
ST   CO    TARIFF       SERVICE DESCRIPTION                          TYPE      POSITION    POSITION     RATE      COST      RATE   
- --   --    ------       -------------------                         -------    --------    --------    ------    -------   ------  
<S>  <C>  <C>        <C>                                             <C>       <C>          <C>        <C>        <C>        <C>   
                            Two Year Contract:                                                                                     
TX   GTE                      First 10 Hours                          USAGE       Yes          Yes      $9.35     $1.2744     $8.08
TX   GTE                      Over 10 Hours                           USAGE       Yes          Yes      $8.42     $1.1476     $7.27
                             Three Year Contract:                                                                                  
TX   GTE                      First 10 Hours                          USAGE       Yes          Yes      $8.80     $1.1994     $7.60
TX   GTE                      Over 10 Hours                           USAGE       Yes          Yes      $7.43     $1.0127     $6.42
                    GRANDFATHERED PRODUCTS AND SERVICES                                                                            
                    Obsolete Services and Equipment                                                                                
               40      Conference Fire Reporting Systems                                                                           
TX   GTE       40          Fire Reporting System                       MRC        Yes          Yes     $18.75       $2.56    $16.19
TX   GTE       40          Stations, each                              MRC        Yes          Yes      $3.75       $0.51     $3.24
TX   GTE       40          Common equipment (inclduing                                                 
                              1 to 5 stations)                         MRC        Yes          Yes     $69.75       $9.51    $60.24
TX   GTE       40          Initial Common Equipment                    MRC        Yes          Yes     $24.25       $3.31    $20.94
TX   GTE       40          Additional Common Equipment                 MRC        Yes          Yes     $18.75       $2.56    $16.19
TX   GTE       40      4-Wire Local Channel                            MRC        Yes          Yes     $19.75       $2.69    $17.06
TX   GTE       40      Direct Inward Dialing Trunk                     MRC        Yes          Yes     $19.75       $2.69    $17.06
TX   GTE       40      Conference Bridge 24-Port                       MRC        Yes          Yes     $68.50       $9.34    $59.16
TX   GTE       40      IXC Mileage - Special Bill                      MRC        Yes          Yes      $6.25       $0.85     $5.40
 
</TABLE>

Footnote:  (1) The retail rates above do not include the End User Subscriber 
               Line Charge (ECSLC).  The ALEC will be responsible for the 
               business or residential charge, $6.00 and $3.50, respectively.
Footnote:  (2) This foot note intentionally left blank.
Footnote:  (3) This matrix is subject to Legal and/or Regulatory constraints.
Footnote:  (4) Prices contained in this price list have been calculated 
               according to the formula:  (1) retail price, less (2) avoided 
               retail costs.
Footnote:  (5) Resale with discount to Business Customers only.  No Resale and 
               No Discount to Residential Customers

<PAGE>   173
                     GTE TELEPHONE OPERATIONS HEADQUARTERS
                  RESALE PRODUCTS & SERVICES - STATE OF TEXAS
                           GTE SOUTHWEST INCORPORATED


<TABLE>
<CAPTION>
           LOCAL                                                    BILLING     RESALE     DISCOUNT    RETAIL    AVOIDED   RESALE  
ST   CO    TARIFF       SERVICE DESCRIPTION                          TYPE      POSITION    POSITION     RATE      COST      RATE   
- --   --    ------       -------------------                         -------    --------    --------    ------    -------   ------  
<S>  <C>  <C>        <C>                                             <C>       <C>          <C>        <C>        <C>        <C>   





</TABLE>

<PAGE>   174
                                   APPENDIX G
                          PRICES FOR UNBUNDLED ELEMENTS


General.  The rates  contained  in this  Appendix  G are the rates as defined in
Article VII and are subject to change resulting from future  Commission or other
proceedings,  including  but not limited to any generic  proceeding to determine
GTE's  unrecovered  costs (e.g.,  historic  costs,  contribution,  undepreciated
reserve  deficiency,  or similar  unrecovered GTE costs (including GTE's interim
Service  Support  Surcharge)),  the  establishment  of a  competitively  neutral
universal service system, or any appeal or other litigation.

<TABLE>
<S>      <C>                                                                       <C>
(1)      Local Loops
             Local Loop
             2 Wire Loop                                                           $ 30.00
             4 Wire Loop                                                           $ 48.00
         Network Interface Device
             Basic NID                                                             $  1.40
             12x NID                                                               $  1.90

(2)      Local Switching (Must purchase Port)
         Ports
             2 Wire Basic Port                                                     $  6.10
             DS-1 Port                                                             $104.70

         Local Switching
             Originating MOU                                                       $ 0.0056438
             Terminating MOU                                                       $ 0.0056438

         Intrastate End Office Switching
             Originating MOU                                                       $ 0.0056438
             Terminating MOU                                                       $ 0.0056438
             Interconnection Charge                                                $ 0.0000000
             CCL
               -Originating                                                        $ 0.0278000
               -Terminating                                                        $ 0.0669000

         Interstate End Office Switching
             Originating MOU                                                       $ 0.0056438
             Terminating MOU                                                       $ 0.0056438
             Interconnection Charge                                                $ 0.0047013
             CCL
               -Originating                                                        $ 0.0100000
               -Terminating                                                        $ 0.0251900

(3)      Features                                                                  SEE ATTACHED

(4)      Dedicated Transmission Links
         Entrance Facility
             2 Wire Voice                                                          $   30.00
             4 Wire Voice                                                          $   48.00
             DS1 Standard 1st System                                               $  253.00
             DS1 Standard Add'l System                                             $  130.00
             DS3 Protected, Electrical                                             $1,089.00
             DS1 to Voice Multiplexing                                             $  190.00
</TABLE>

                                      G-1

<PAGE>   175

<TABLE>
<S>      <C>                                                                       <C>
             DS3 to Voice Multiplexing                                             $  400.00
         Direct Trunked Transport
             Voice Facility Per ALM                                                $    5.00
             DS1 Facility Per ALM                                                  $    5.00
             DS1 Per Termination                                                   $   30.00
             DS3 Facility Per ALM                                                  $   50.00
             DS3 Per Termination                                                   $  300.00
(5)      Common/Shared Transmission Links
         Transport Termination MOU/Term                                            $ 0.0009636
         Transport Facility MOU/Mile                                               $ 0.0000028
(6)      Tandem Switching MOU                                                      $ 0.0012971
(7)      Databases and Signaling Systems
         Signaling Links and STP
             56 Kbps Links -                                                       $  76.02
             DS-1 Link                                                             $ 297.71
             Signal Transfer Point (STP) Port Term                                 $ 537.00
         Call Related Databases
             Line Information Database (ABS-Queries)                               $  0.035
             Line Information Database Transport (ABS-Queries)                     $ 0.0046
             Toll Free Calling Database (DB800 Queries)                            $ 0.0087530
Non-Recurring Charges for Unbundled Services

Service Ordering (loop or port)
         Initial Service Order, per order                                          $  47.25
         Transfer of Service Charges, per order                                    $  16.00
         Subsequent Service Order, per order                                       $  24.00
         Customer Service Record Research, per request                             $   5.25
Installation
         Unbundled Loop, per loop                                                  $  11.00
         Unbundled Port, per port                                                  $  11.00
Loop Facility Charge, per order                                                    $  64.00 
         This charge will apply when field work is required for establishment 
         of new unbundled loop service.
Monthly Recurring Charge for EIS
         DS0 Level Connection                                                      $   2.31
         DS1 Level Connection                                                      $   5.31

</TABLE>


                                      G-2
<PAGE>   176

                                 TEXAS FEATURES
                                 --------------
<TABLE>
<CAPTION>

FEATURE NAME:                                                              GTE PROPOSED RATE:
- ------------                                                               -----------------
<S>      <C>                                                                        <C>   
1.       Speed Call 8 (Changeable)                                                  $ 0.25
2.       Speed Call 30 (Changeable)                                                 $ 0.25
3.       Cancel Call Waiting                                                        $ 0.25
4.       Call Forward Variable                                                      $ 0.25
5.       Call Waiting                                                               $ 0.25
6.       Dual Tone Multifrequency (DTMF)                                            $ 0.25
7.       Teen Service/Distinctive Ringing                                           $ 0.25
8.       Three-Way Calling                                                          $ 0.75
9.       Account Codes For AFR                                                      $ 0.25
10.      Add On - Consultation Hold - Incoming Only                                 $ 0.25
11       Attendant BL Verification                                                  $ 1.00
12.      Attendant camp-on (NonDL Console)                                          $ 0.25
13.      Attendant Conference                                                       $ 4.75
14.      Attendant Position Busy                                                    $ 2.75
15.      Attendant Recall from Satellite                                            $ 2.00
16.      Authorization Codes for AFR                                                $ 0.50
17.      Basic Business Group                                                       $ 1.50
18.      Dual Tone Multifrequency (DTMF)                                            $ 0.25
19.      Station-to-Station Dialing (Intercom)                                      $ 3.25
20.      Business Group Automatic Callback (BGAC)                                   $ 0.25
21.      Call Forwarding Variable                                                   $ 0.25
22.      Business Group - Speed Call - 8                                            $ 0.25
23.      Business Group - Speed Call - 30                                           $ 0.25
24.      Business Group-Three Way Calling (TWC)                                     $ 0.75
25.      Business Set Access To Paging                                              $ 2.25
26.      Business Set Call Grp Intercom                                             $203.25
27.      Code Calling                                                               $ 0.25
28.      Call Forward Busy Line                                                     $ 0.25
29.      Call Forward Don't Answer                                                  $ 0.25
30.      Call Forward Fixed                                                         $ 0.25
31.      Call Forwarding - Incoming Only                                            $ 0.25
32.      Call Flip/Flop                                                             $ 0.25
33.      Call Forwarding-Withing Group                                              $ 0.25
34.      Call Hold                                                                  $ 0.25
35.      Circular Hunting                                                           $ 0.25
36.      Control of Facilities                                                      $ 0.25
37.      Conference Calling 6 Way                                                   $ 4.00
38.      Call Park                                                                  $ 0.25
39.      Call Pick-Up                                                               $ 0.25
40.      Code Restrictions and Diversion                                            $ 1.75
41.      Call Transfer Individual - All Calls                                       $ 0.25
42.      Call Waiting Originating                                                   $ 0.25
43.      Call Waiting Terminating                                                   $ 0.25
44.      Direct Connect                                                             $ 0.25
45.      Directed Call Pickup W/BI                                                  $ 0.25
46.      Directed Call Pickup WO/BI                                                 $ 0.25
47.      Dial Call Waiting                                                          $ 0.25

</TABLE>

                                      G-3
<PAGE>   177


                                 TEXAS FEATURES
                                 --------------
<TABLE>
<CAPTION>
 
FEATURE NAME:                                                              GTE PROPOSED RATE:
- ------------                                                               -----------------
<S>      <S>                                                                        <C>   
48.      Remote Access to (Business Group) Features                                 $ 0.25
49.      Distinctive Ringing                                                        $ 0.25
50.      Executive Busy Override                                                    $ 0.25
51.      Fixed Night Service - Call Fwd                                             $ 0.25
52.      Fixed Night Service- Key                                                   $ 0.75
53.      Fully Restricted (Orig/Term)                                               $ 0.50
54.      Facility Restriction Level                                                 $ 1.75
55       Foreign Exchange Facilities                                                $ 0.50
56.      Last Number Redial                                                         $ 0.25
57.      Loud Speaker Paging                                                        $ 0.50
58.      Make Busy Key                                                              $ 1.25
59.      Music on Hold                                                              $ 0.25
60.      Off-Hook Queuing                                                           $ 0.25
61.      On-Hook Queuing                                                            $ 0.25
62.      Preferential Multiline Hunting                                             $ 0.25
63.      Queuing                                                                    $ 4.75
64.      Recorded Telephone Dictation                                               $ 0.50
65.      Speed Calling Individual 1 Digit                                           $ 0.25
66.      Speed Calling Individual 2 Digit                                           $ 0.25
67.      Stop Hunt Key                                                              $ 1.25
68.      Special Intercept Announcements                                            $ 6.00
69.      SMDR To Customer Premise                                                   $ 22.75
70.      Station Message Detail Recording - RAO                                     $ 1.25
71.      Station Restricted (Orig/Term)                                             $ 0.50
72.      Time of Day Routing Control                                                $ 0.50
73.      Toll Restricted Service                                                    $ 1.50
74.      Two-way Splitting                                                          $ 0.25
75.      Uniform Call Distribution (UCD) Hunting                                    $ 0.25
76.      Auto Alt Rt                                                                $ 1.00
77.      Auto Rt Sel                                                                $ 0.75
78.      Meet Me Conf                                                               $ 51.25
79.      Auto Call Back                                                             $ 0.25
80.      Anon Call Rej                                                              $ 0.25
81.      Auto Recall                                                                $ 0.25
82.      Call Num Deliver                                                           $ 0.25
83.      Call Num DeliverBlk                                                        $ 0.25
84.      Cust Ord Trace                                                             $ 0.25
85.      Dist Ring/VIP                                                              $ 0.25
86.      Select Call Accept                                                         $ 0.25
87.      Select Call Frwd                                                           $ 0.25
88.      Select Call Reject                                                         $ 0.25
89.      Select Call Wait                                                           $ 0.25
         ----------------                                                           ------
         TOTAL                                                                      $340.25

</TABLE>

                                      G-4
<PAGE>   178

                                   APPENDIX H
                   RATES AND CHARGES FOR 911/E911 ARRANGEMENTS

The following services are offered by GTE for purchase by DTI, where an
individual item is not superseded by a tariffed offering.

<TABLE>
<CAPTION>

                                                                                      NRC              MRC
                                                                                      ---              ---
<S>                                                                                <C>              <C> 
1.     9-1-1 Selective Router Map                                                   $125.00            n/a
       Provided is a color map showing a selective router's
       location and the GTE central offices that send their 9-1-1
       call to it.  The selective router and central office information
       will include CLLI codes and NPA/NXXs served.  The map
       will include boundaries of each central office and show major
       streets and the county boundary.  Permission to reproduce
       within DTI for its internal use is granted without further fee.
       Non-tariffed price.

2.     9-1-1 Selective Router Pro-Rata Fee/trunk                                       $0           $100.77
       This fee covers the cost of selective routing switch capacity
       per trunk to cover investment to handle the additional capacity
       without going to the 9-1-1 districts for additional funding.

3.     PS ALI Software                                                              $790.80
       a personal computer software program running on Windows
       3.1(TM)for formatting subscriber records into NENA Verison #2
       format to create files for uploading to GTE's ALI Gateway.
       Fee includes software, warranty and 1 800 872-3356 support
       at no additional cost.

4.     ALI Gateway Service                                                          $135.00          $36.12
       Interface for delivery of ALI records to GTE's Data Base
       Management System.  This provides a computer access port for
       DTI to transmit daily subscriber record updates to GTE for
       loading into ALI databases.  It includes support at
       1 800 872-3356 at no additional cost.

5.     9-1-1 Interoffice Trunk                                                      Tariff          Tariff
       This is a tariffed offering, to be found in each state's
       Emergency Number Service Tariff.

6.     ALI Database                                                                 Tariff          Tariff
       This is a tariffed offering, to be found in each state's
       Emergency Number Service Tariff.

7.     Selective Router Database per Record Charge                                  Tariff          Tariff
       Fee for each ALI record used in a GTE selective router.
       This is a tariffed offering, to be found in each state's 
       Emergency Number Service Tariff.
</TABLE>

                                      H-1
<PAGE>   179

<TABLE>
<CAPTION>
                                                                                      NRC            MRC
                                                                                      ---            ---
<S>    <C>                                                                         <C>           <C>  
8.     MSAG Copy
       Production of one copy of a 9-1-1 Customer's Master Street Address Guide,
       postage paid.
       a.    Copy provided in paper format                                          $238.50          $54.00
       b.    Copy provided in flat ASCII file on a 3 1/2" diskette                  $276.00          $36.00
</TABLE>

                                      H-2

<PAGE>   180
                                   APPENDIX I
             SERVICE ORDERING, PROVISIONING, BILLING AND MAINTENANCE


1.       Service  Ordering,  Provisioning,  and Billing  Systems 
         Generally.  The following describes generally the operations support
         systems that GTE will use and the related functions that are available
         for ordering, provisioning and billing for resold services,
         interconnection facilities and services and unbundled network
         elements. Except as specifically provided otherwise in this Agreement,
         service ordering, provisioning, billing and maintenance shall be
         governed by the GTE Guide. Before orders can be taken, DTI will
         provide GTE with its Operating Company Number ("OCN") and Company Code
         ("CC") as follows:
         
         (a)  The ALEC must provide their OCN (four-digit alpha-numeric
              assigned by Bellcore or number administrator) on the ALEC
              Profile. The GTE Guide provides the necessary information for the
              ALEC to contact Bellcore to obtain the OCN. There are no optional
              fields on the Profile.

         (b)  Before the Local Service Request ("LSR") and Directory Service
              Request ("DSR") order forms can be processed DTI must provide the
              OCN and Customer Carrier Name Abbreviation ("CCNA").

1.1      Operations Support Systems for Trunk-Side Interconnection

         1.1.1     DTI will be able to order trunk-side interconnector
                   services and facilities from GTE through a direct electronic
                   interface over the GTE Network Data Mover ("NDM") in a
                   nondiscriminatory manner. Orders for trunk-side
                   interconnection will be initiated by an Access Service
                   Request ("ASR") sent electronically by DTI over the NDM.
                   ASRs for trunk-side interconnection will be entered
                   electronically into GTE's Carrier Access Management System
                   ("CAMS") to validate the request, identify any errors, and
                   resolve any errors back to DTI. CAMS is a family of GTE
                   systems comprised primarily of EXACT/TUF, SOG/SOP, and CABS.

         1.1.2     The use of CAMS to support DTI's requests for trunk-side 
                   interconnection will operate in the following manner: GTE
                   will route the ASR through its data center to one of two
                   National Access Ordering Centers ("NACC"). The ASR will be
                   entered electronically into the EXACT/TUF system for
                   validation and correction of errors. Errors will be referred
                   back to DTI. DTI then will correct any errors that GTE has
                   identified and resubmit the request to GTE electronically
                   through a supplemental ASR, without penalty or charge (e.g.,
                   order modification charge) to DTI. Similarly, errors
                   committed by GTE subsequent to the receipt of a valid ASR
                   from DTI will be expeditiously identified and corrected by
                   GTE without the need for DTI's submission of a supplemental
                   ASR. GTE then will translate the ASR into a service order
                   for provisioning and billing. In order to convert the ASR
                   into a service order, GTE personnel must apply the necessary
                   elements to provision the service and include the billable
                   elements necessary for GTE to bill DTI for the services
                   provided. This application also requires a determination of
                   the access tandem to end office relationships with the
                   service requested.

         1.1.3     At the next system level, translated service orders will be 
                   distributed electronically through the SOG/SOP systems to
                   several destinations. The SOG/SOP system will begin the
                   actual provisioning of the service for DTI. Other GTE
                   provisioning systems are CNAS and ACES. The GTE Database
                   Administrative Group ("DBA")

                                     I-1
<PAGE>   181

                   and the Special Services Control Center ("SSCC") will
                   be the two most important destinations at this level. The
                   DBA location will identify codes for the appropriate GTE
                   switch in order to provide the functions required by the
                   ASR. The SSCC will provide the engineering for the
                   facilities over which the services will be handled.
                   Information from these two groups (and others) then will be
                   transmitted electronically to GTE's field service personnel
                   (Customer Zone Technicians or "CZTs") who will establish the
                   trunks and facilities, thus connecting the GTE facilities to
                   a connecting company, if one is required, and to DTI. GTE's
                   CZTs also will contact DTI directly to perform testing, and
                   upon acceptance by DTI, will make the necessary entries into
                   the GTE system to complete the order. The completed orders
                   then will pass to GTE's Carrier Access Billing System
                   ("CABS") which will generate the bill to DTI. The billing
                   process under CABS requires coordination with several other
                   systems.

         1.1.4     Billing for transport and termination services cannot be 
                   accomplished without call records from GTE's central office
                   switches. Records of usage will be generated at GTE's end
                   office switches or the access tandems. Call usage records
                   will be transmitted electronically from GTE's switches
                   through GTE's Billing Intermediate Processor ("BIP"). This
                   system will collect the call records, perform limited
                   manipulations to the record and transfer them to a
                   centralized data center where they will be processed through
                   the Universal Measurement System ("UMS") to determine the
                   validity and accuracy of the records. UMS also will sort the
                   records and send them to the CABS billing system, from which
                   GTE will produce a bill and send it to DTI.

1.2      Operations Support Systems for Resold Services and Unbundled Elements

         1.2.1     DTI will also be able to order services for resale and 
                   unbundled network elements, as well as interim number
                   portability, directly from GTE through an electronic
                   interface. To initiate an order for these services or
                   elements, DTI will submit a Local Service Request ("LSR")
                   from its data center to GTE's Data Center using the same
                   electronic NDM interface used for trunk-side
                   interconnection. If no NDM interface exists or if DTI
                   chooses to establish a separate NDM interface, DTI must
                   request an NDM facility. For new entrants that elect not to
                   interface electronically, GTE will accommodate submission of
                   LSR orders by facsimile, E-mail, Internet or a dial NDM
                   arrangement. An LSR is very similar to an ASR, except that
                   it will be used exclusively for line-side interconnection
                   requests. GTE will transfer LSRs to GTE's NOMC centralized
                   service order processing center electronically.

         1.2.2     Most LSRs will be used either to transfer an existing
                   GTE  customer to DTI or to request service for a new
                   customer who is not an existing GTE customer. Depending on
                   the situation, different information will be required on the
                   LSR. LSRs for a conversion of a GTE local customer to DTI
                   must include information relating to all existing, new and
                   disconnected services for that customer, including the
                   customer's name, type of service desired, location of
                   service and features or options the customer desires. DTI
                   will be able to obtain this customer information after GTE
                   has received the customer's written consent as specified in
                   Article VI.3.3. For service to a new customer who is not an
                   existing GTE customer, the LSR must contain the customer's
                   name, service address, service type, services, options,
                   features and ALEC data. If known, the LSR should include the
                   telephone number and due date/desired due date.

                                     I-2
<PAGE>   182


         1.2.3     While DTI would have its own customer information and
                   may  have the SAG/GTE products on tape from GTE, DTI would
                   not have the due date or new telephone number for new
                   customers since that information is contained in GTE's
                   systems. Therefore, a process is required to provide this
                   information to DTI. GTE itself does not have uniform access
                   to this information electronically. Until GTE and DTI have
                   agreed and established electronic interfaces, DTI agrees
                   that an 800 number is the method that will be used. The 800
                   telephone number will connect DTI directly to GTE's NOMC
                   service representatives. When DTI receives a request for
                   basic services from a new local service customer, DTI will
                   call GTE's NOMC through the 800 number, and, while the new
                   customer is on hold, GTE will provide the due date for
                   service and the new telephone number for that customer. At
                   the same time, DTI will give GTE the new customer's name,
                   service address and type of requested service (i.e., R1,
                   B1). GTE will enter that information into its SORCES or
                   SOLAR service ordering systems to be held in suspense until
                   DTI sends the confirming LSR. DTI will then return to its
                   customer holding on the line and provide the due date and
                   new telephone number.

         1.2.4     After concluding the telephone call with the new
                   customer,  DTI will complete a confirming LSR for the new
                   service and send it electronically to GTE's data center for
                   processing. Upon receipt, GTE will match the LSR with the
                   service order suspended in GTE's system, and if there is a
                   match, GTE will process the LSR. After the LSR is processed,
                   GTE will transmit confirmation electronically to DTI through
                   the NDM that the LSR has been processed, providing a record
                   of the telephone number and due date. DTI will be required
                   to submit the confirming LSR by 12:00 p.m. each day local
                   time, as defined by the location of the service address. If
                   DTI fails to submit the LSR in a timely manner, the
                   suspended LSR will be considered in jeopardy, at which time
                   GTE will assign a new due date upon receipt of the delayed
                   LSR for such customer requests and notify DTI of the change.

         1.2.5     Number assignments and due date schedules for services
                   other than single line service and hunt groups up to 12
                   lines will be assigned within approximately twenty-four (24)
                   hours after GTE's receipt of the LSR using the standard
                   Local Confirmation ("LSC") report sent electronically to DTI
                   over the NDM, thereby providing a record of the newly
                   established due date. An exception would be a multi-line
                   hunt group for 12 lines or fewer. The other numbers then
                   will be provided through the normal electronic confirmation
                   process.

         1.2.6     The processing of specifically requested telephone
                   numbers  (called "vanity numbers") is as follows. GTE will
                   work with DTI on a real time interface to process vanity
                   numbers while DTI's customer is still on the line. If a
                   number solution can be established expeditiously, it will be
                   done while the customer is still on the line. If extensive
                   time will be required to find a solution, GTE service
                   representatives will work with DTI representatives off line
                   as GTE would for its own customers. For all of this, the
                   basic tariff guidelines for providing telephone numbers will
                   be followed.

         1.2.7     Once the order for line-side interconnection service is 
                   established, it is moved for provisioning to the next system
                   level. Here, GTE will validate and process the LSR to
                   establish an account for DTI and, if GTE continues to
                   provide some residual services to the customer, GTE will
                   maintain a GTE account. In GTE's system, GTE's account is
                   called the Residual Account and DTI's account is referred to
                   as DTI Account. If any engineering for the service is
                   necessary, the account would be distributed to the SSCC.
                   Otherwise, it will be distributed for facility assignment.

                                     I-3
 
<PAGE>   183

         1.2.8     With the account established and any engineering and 
                   facility assignment complete, GTE then will transmit
                   electronically a record to GTE's CZT field personnel if
                   physical interconnection or similar activity is required.
                   The CZTs will provision the service and then electronically
                   confirm such provision in the SOLAR/SORCES system when
                   completed. The accounts then will be transmitted to GTE's
                   Customer Billing Services System ("CBSS"). GTE shall provide
                   to DTI a service completion report. Call records for actual
                   service provided to DTI's customers on GTE facilities will
                   be transmitted from GTE's switches through some usage rating
                   systems (BIP, UMS), screened and eventually delivered to
                   CBSS for the generation of bills.

         1.2.9     CBSS is a different system than CABS, and it is the one
                   that GTE will utilize to produce the required bills for
                   resold services, unbundled elements and local number
                   portability. CBSS will create a bill to DTI for resold
                   services and unbundled elements along with a summary bill
                   master. Daily unrated records for intraLATA toll usage and
                   local usage (in collect usage data will be provided on rated
                   basis) on DTI's accounts will be generated and transmitted
                   electronically to DTI.

         1.2.10    On resold accounts, GTE will provide usage in EMR
                   format per existing file exchange schedules. The usage
                   billing will be in agreed upon level of detail for DTI to
                   issue a bill to its end users.

         1.2.11    GTE will provide DTI with detailed monthly billing
                   information in a paper format until an agreed upon
                   Electronic Data Interchange 811 electronic bill format is
                   operational.

         1.2.12    State or sub-state level billing will include up to ten
                   (10) summary bill accounts. 

         1.2.13    GTE accepts DTI's control reports and agrees to utilize 
                   industry standard return codes for unbillable messages.
                   Transmission will occur via the NDM. Tape data will conform
                   to Attachment "A" of the LRDTR. Data will be delivered
                   Monday through Friday except for Holidays as agreed. Data
                   packages will be tracked by invoice sequencing criteria. GTE
                   contacts will be provided for sending/receiving usage files.

         1.2.14    GTE will retain data backup for 45 Business Days. To
                   the  extent this retention is exclusively for DTI, DTI shall
                   reimburse GTE for all expenses related to this retention.

         1.2.15    In addition to the LSR delivery process, DTI will
                   distribute directory assistance and directory listing
                   information (together sometimes referred to hereafter as
                   "DA/DL information") to GTE via the LSR ordering process
                   over the NDM. GTE will provide listings service via its
                   "listing continuity" offering.

         1.2.16    Charges and credits for PIC changes ordered via an LSR
                   will appear on the wholesale bill. As DTI places a request
                   for a PIC change via LSR, the billing will be made on DTI
                   account associated with each individual end user. GTE will
                   process all PIC changes from IXCs that are received for DTI
                   end users by rejecting back to the IXC with DTI OCN. Detail
                   is provided so that DTI can identify the specific charges
                   for rebilling to their end user.

                                     I-4
<PAGE>   184

         1.2.17    CMDS.  The parties provide for the distribution of
                   intraLATA CMDS incollect messages and/or selected local
                   measured  service messages as follows:

                   1.2.17.1  Messages to be Screened.  GTE receives CMDS  I
                             transmissions containing intraLATA incollect
                             messages from the state RBOC CMDS host each
                             business day. Per DTI's request, GTE will screen
                             the incollects by NPA and line number and
                             accumulate the Collect, Third Number Billed and
                             Credit Card (collectively called incollects)
                             messages in a data file. The screening will be for
                             end users who have chosen DTI as their local
                             service provider through a Resale or Unbundled
                             Network arrangement. The screened incollect
                             messages and any Local Measured Service (LMS)
                             usage will be accumulated and forwarded to DTI.
                             The Parties will mutually agree on the frequency
                             of the data exchange and the method of
                             transmission (i.e., magnetic tape or direct
                             electronic transmission). GTE will forward the
                             screened messages in the industry standard EMR
                             format. GTE intraLATA toll messages that are
                             recorded by GTE and dialed on a one plus or zero
                             plus basis are not part of this section and will
                             not be screened.

                   1.2.17.2  Compensation.  GTE will bill DTI monthly for
                             all services related to the screening,
                             accumulating, processing and transmitting of
                             incollect messages and LMS usage, if applicable,
                             at a reasonable and mutually agreeable charge. In
                             addition, any message processing fee associated
                             with DTI's incollect messages that are charged to
                             GTE by the CMDS Host will be passed on to DTI on
                             the monthly statement. All revenue, surcharges,
                             taxes and any other amounts due to the CMDS Host
                             for DTI's incollect messages will be billed on the
                             monthly statement. It is DTI's responsibility to
                             bill and collect all incollect and LMS amounts due
                             from its end users. The incollect and LMS revenue
                             amounts that are listed on the monthly invoice are
                             payable to GTE in total. The Parties agree that
                             the arrangement for invoicing the incollect and
                             LMS revenue amounts due GTE is not a settlement
                             process with DTI.


                   1.2.17.3  Administration. The Parties agree to develop  a
                             process whereby DTI's end user information is
                             available in a timely manner to allow GTE to build
                             tables to screen the CMDS incollect files and LMS
                             files on behalf of DTI.

         1.2.18    Backbilling. GTE shall bill DTI on a timely      
                   basis. In no  case shall GTE bill DTI for previously
                   unbilled charges that are for more than one year prior to
                   the current bill date.

1.3      Order Processing.

         1.3.1     Order Expectations.  DTI agrees to warrant to GTE that
                   it is a certified provider of telecommunications service.
                   DTI will document its Certificate of Operating Authority on
                   DTI Profile and agrees to update this DTI Profile as
                   required to reflect its current certification. The Parties
                   agree to exchange and to update end user contact and
                   referral numbers for order inquiry, trouble reporting,
                   billing inquiries,

                                     I-5
<PAGE>   185

                   and information required to comply with law enforcement
                   and other security agencies of the government. The Parties
                   also agree to exchange and to update internal order, repair
                   and billing point of contacts. Prior to submitting an order
                   under this Agreement, DTI shall obtain such documentation as
                   may be required by state and federal laws and regulations.

         1.3.2     GTE shall provide DTI with a specified customer contact 
                   center for purposes of placing service orders and
                   coordinating the installation of services. These activities
                   shall be accomplished by telephone call or facsimile until
                   electronic interface capability has been established. The
                   Parties adopt the OBF LSR and DSR forms for the ordering,
                   confirmation and billing of resale and unbundled services.
                   The Parties adopt the OBF ASR forms for the ordering,
                   confirmation and billing of trunk-side interconnection.

         1.3.3     GTE will process such service orders during normal
                   operating hours, at a minimum on each Business Day between
                   the hours of 8 a.m. to 8 p.m. Eastern Time and shall
                   implement service orders within the same time intervals used
                   to implement service orders for similar services for its own
                   users.

         1.3.4     GTE will provide current GTE customer proprietary
                   network  information (name, address, telephone number and
                   description of services provided by GTE including PIC and
                   white page directory listing information) as provided in
                   Article VI, Section 3. The return of customer information
                   will be via facsimile or via electronic transmission.

         1.3.5     Transfer Between Local Service Providers - GTE will
                   provide a displacement/out service report to a Local Service
                   Provider (LSP) whenever an end user leaves that LSP and
                   procures service from another LSP. When DTI end user changes
                   to another LSP, GTE will notfiy DTI when such activity
                   occurs the day after completion or within 48 hours of such
                   disconnect.

2.       Maintenance Systems.

2.1      General Overview

         2.1.1     If DTI requires maintenance for its local service
                   customers, DTI will initiate a request for repair (sometimes
                   referred to as a "trouble report") by calling GTE's Customer
                   Care Repair Center. During this call, GTE service
                   representatives will verify that the end-user is DTI
                   customer and will then obtain the necessary information from
                   DTI to process the trouble report. While DTI representatives
                   are still on the line, GTE personnel will perform an initial
                   analysis of the problem and remote line testing for resale
                   services. If engineered services are involved, the call will
                   be made to the GTE SSCC for handling. If no engineering is
                   required and the line testing reveals that the trouble can
                   be repaired remotely, GTE personnel will correct the problem
                   and close the trouble report while DTI representatives are
                   still on the line. If on-line resolution is not possible,
                   GTE personnel will provide DTI representatives a commitment
                   time for repair, and the GTE personnel then will enter the
                   trouble ticket into the GTE service dispatch queue. DTI's
                   repair service commitment times will be within the same
                   intervals as GTE provides to its own end users. Maintenance
                   and repair of GTE facilities is the responsibility of GTE
                   and will be performed at no incremental charge to DTI. If,
                   as a result of DTI-initiated trouble report, trouble is
                   found to be the responsibility of DTI (e.g., non-network
                   cause) GTE will charge DTI for trouble isolation. DTI will
                   have the ability to report

                                     I-6
<PAGE>   186

                   trouble for its end users to appropriate trouble reporting
                   centers 24 hours a day, 7 days a week. DTI will be assigned
                   a customer contact center when initial service agreements
                   are made.

         2.1.2     Repair calls to the SSCC for engineered services will
                   be  processed in essentially the same manner as those by the
                   GTE Customer Care Center. GTE personnel will analyze the
                   problem, provide DTI representative with a commitment time
                   while they are still on the line, and then place the trouble
                   ticket in the dispatch queue.

         2.1.3     GTE then will process all DTI trouble reports in the
                   dispatch queue along with GTE trouble reports in the order
                   they were filed (first in, first out), with priority given
                   to out-of-service conditions. If, at any time, GTE would
                   determine that a commitment time given to DTI becomes in
                   jeopardy, GTE service representatives will contact DTI by
                   telephone to advise of the jeopardy condition and provide a
                   new commitment time.

         2.1.4     Trouble reports in the dispatch queue will be
                   transmitted  electronically to GTE CZT service technicians
                   who will repair the service problems and clear the trouble
                   reports. For cleared DTI trouble reports, GTE service
                   technicians will make a telephone call to DTI directly to
                   clear the trouble ticket. GTE service technicians will make
                   the confirmation call to the telephone number provided by
                   DTI. If DTI is unable to process the call or places the GTE
                   technician on hold, the call will be terminated. To avoid
                   disconnect, DTI may develop an answering system, such as
                   voice mail, to handle the confirmation calls expeditiously.

         2.1.5     GTE will provide electronic interface access to
                   operation  support systems functions which provide the
                   capability to initiate, status and close a repair trouble
                   ticket. GTE will not provide to DTI real time testing
                   capability on DTI end user services. GTE will not provide to
                   DTI an interface for network surveillance (performance
                   monitoring).

         2.1.6     GTE will resolve repair requests by or for DTI local
                   service customers using GTE's existing repair system in
                   parity with repair requests by GTE end users. GTE will
                   respond to service requests for DTI using the same time
                   parameters and procedures that GTE uses. DTI then would call
                   GTE's Customer Care Center or SSCC while the customers were
                   on hold.

2.2      Network Management Controls.

         2.2.1     Network Maintenance and Management.  The Parties will work 
                   cooperatively to install and maintain a reliable network.

         2.2.2     Neither Party shall be responsible to the other if necessary
                   changes in network configurations render any facilities of
                   the other obsolete or necessitate equipment changes.

         2.2.3     Network Management Controls.  Each Party shall provide a 
                   24-hour contact number for Network Traffic Management issues
                   to the other's network surveillance management center. A fax
                   number must also be provided to facilitate event
                   notifications for planned mass calling events. Additionally,
                   both Parties agree that they shall work cooperatively that
                   all such events shall attempt to be conducted in such a
                   manner as to avoid degradation or loss of service to other
                   end users. Each

                                     I-7
<PAGE>   187

                   Party shall maintain the capability of respectively
                   implementing basic protective controls such as "Cancel To"
                   and "Call Gap."

3.       Electronic Interface. The Parties shall work cooperatively in
         the implementation of electronic gateway access to GTE operational
         support systems functions in the long-term in accordance with
         established industry standards. DTI shall compensate GTE for the full
         costs including but not limited to design, development, testing,
         implementation and deployment, for access to GTE's Operational Support
         System functions. Where subsequent parties request use of GTE's
         operation support systems, cost recovery for such electronic interface
         systems shall be allocated among all requesting users.

3.1      DTI shall have immediate access to the following OSS electronic
         interfaces that will provide functionality to enable DTI to service
         customers in an equal and non-discriminatory manner: 

         3.1.1     Pre-Order functions, e.g., TN Assignment, DD Reservation, 
                   Address Validation, Product Availability, that are available
                   on a dial-up or dedicated basis using the Secure Integrated
                   Gateway System (SIGS).

         3.1.2     Order functions that are available on a dial-up or dedicated
                   basis using CONNECT: Mail file transfer.

         3.1.3     Repair functions, e.g., trouble report repair functions, to
                   allow DTI to determine status and close trouble reports.

         3.1.4     Electronic transfer of DTI bill in electronic data 811 
                   format.

3.2      DTI may migrate to fully interactive system to system
         interconnectivity.  GTE, with input from DTI and other carriers, shall
         provide general interface specifications for electronic access to this
         functionality. These specifications will be provided to enable DTI to
         design system interface capabilities. Development will be in
         accordance with applicable national standards committee guidelines.
         Such interfaces will be available as expeditiously as possible.

3.3      All costs and expenses for any new or modified electronic
         interfaces exclusively to meet DTI requirements that GTE determines
         are technically feasible and GTE agrees to develop will be paid by
         DTI. Costs for development of systems intended for common use by
         competing carriers will be assessed based on a mutually agreed method
         of cost recovery.

3.4      DTI shall be responsible for modifying and connecting any of
         its pre-ordering and ordering systems with GTE provided interfaces as
         described in this Appendix.

4.       GTE Initiated Electronic System Redesigns. GTE will not charge
         DTI when GTE initiates its own electronic system
         redesigns/reconfigurations.

                                     I-8
<PAGE>   188


                                   APPENDIX J
                                  SS7 SERVICES


                                   ARTICLE 1.
                                   DEFINITIONS

In addition to the definitions contained elsewhere in the Agreement to which
this Appendix J is attached and made a part, for purposes of this Appendix J the
following terms shall have the following meanings. 

1.1      "A" Link: An access signaling link that connects SPs and/or SSPs to 
         STPs. 

1.2      "B" Link: A bridge signaling link that connects two (2) sets or
         pairs of  STPs, not the STPs within a mated pair, but on the same
         hierarchical level.

1.3      Compatibility Testing: Certification testing performed by
         representatives  of GTE and DTI to ensure proper interconnection of
         CCS network facilities for accurate transmission of system signals and
         messages. This certification testing shall be performed in accordance
         with the following ANSI documents:

              T1.234 Telecommunications - Signaling System Number 7 (SS7) -
              MTP  Levels 2 and 3 Compatibility Testing (ATIS)  
              T1.235 Telecommunications - Signaling System Number 7 (SS7) - 
              SCCP Class 0 Compatibility Testing (ATIS)  
              T1.236 Telecommunications - Signaling System Number 7 (SS7) - 
              ISDN  User Part Compatibility
              Testing (ATIS)

1.4      Service:  The service described in Article 2 of this Appendix.
    
1.5      Signaling Link: An end-to-end high-capacity data link (56 kbps)
         that transmits supervision and control signals from one network SS7
         node to another in a CCS network. The link type identifies the
         functionality of the signaling link sets. The two link types
         associated with the Service are "a" Links and "B" Links.

1.6      Signaling Point Code (SPC): A code that identifies the
         Signaling Point address in the CCS network. Signaling Point Codes
         consist of three (3) segments of three (3) digits each, identifying
         the network ID, network cluster, and cluster member, respectively.

1.7      Signaling Point of Interface (SPOI):  The point at which GTE hands off 
         signaling information to DTI.
     
                                   ARTICLE 2.
                               SERVICE DESCRIPTION

2.1      Provision.  Subject to the terms and conditions of this Appendix, GTE 
         agrees to provide the Service to DTI.

2.2      Interconnection.  This Agreement is for DTI's interconnection
         with GTE  at GTE's _____________ STPs to support local exchange
         services.  DTI shall not submit signaling messages in support of
         interexchange services.

2.3      Service.  The "Service" consists of the following:
    
         (a)  Interconnection of GTE's CCS/SS7 network to DTI's CCS/SS7 network 
              is via an "a" Link connection between DTI's SP or SSP and GTE's 
              STP. The "a" Link connection is made by a 

                                     J-1
<PAGE>   189

              dedicated 56 kbps channel between the SP or SSP and the STP.
              Any connection from an SSP or an SP to an STP pair will have a
              link to each individual STP (i.e., two (2) links). DTI and GTE
              shall mutually agree upon the location of the SPOI.
         
         (b)  Interconnection of GTE's CCS/SS7 network to DTI's CCS/SS7
              network via  a "B" Link connection between DTI's STPs and GTE's
              STPs. The "B" Link connection is a dedicated 56 kbps channel.
              Connections between two (2) pairs of STPs will have four (4)
              connections; i.e., one (1) link from each individual STP to each
              individual STP. DTI and GTE shall mutually agree upon the
              location of the SPOI.

         (c)  Local and IntraLATA call set-up signaling, allowing DTI to use
              the  out-of-band trunk signaling provided by GTE's CCS/SS7
              network to carry its calls on the intraLATA toll network.

         (d)  The Service shall include access to: (1) all switching systems
              served by a given STP which have been converted to SS7 signaling,
              including switching systems owned by other local service
              providers; (2) databases directly connected to a given STP, with
              the exception of 800/888 databases which can be accessed through
              any STP; (3) other local service provider STPs on an intraLATA
              basis; and (4) other Third Party local service provider STPs on
              an intraLATA basis.

         (e)  It is the responsibility of DTI to populate the "privacy
              indicator"  portion of all SS7 signaling messages forwarded to
              GTE's network. GTE agrees to deliver the information forwarded by
              DTI in the SS7 signaling message. DTI, by entering into this
              Agreement, agrees to deliver "privacy indicator" information
              forwarded by GTE in its signaling message.

         (f)  DTI acknowledges that call set-up times may be greater when DTI 
              employs intermediate access tandems (IATs) in its network.
         
         (g)  If selected on the order form attached to this Appendix, the
              Service  shall also include IXC call set-up signaling service
              (ISUP) as described in Article 2.4 of this Appendix. Additional
              charges as set forth in Exhibit A shall apply.

2.4      ISUP Service Charge. This is an optional service that allows
         DTI to utilize SS7 signaling to an SS7 capable interexchange carrier
         (IXC) for Feature Group D access service and other intraLATA
         interexchange services. The ISUP service is a monthly charge. 

         (a)  The rate for ISUP signaling is per connection in situations
              when GTE does not provide any underlying call messages for DTI on
              GTE's network trunks. The rate for ISUP signaling is shown in
              Exhibit a.
        
         (b)  Where GTE has a mated pair of STPs and has CCS/SS7 interconnection
              facilities to an IXC within the same LATA, for interexchange
              telecommunications services, GTE shall provide call set-up 
              signaling between DTI and the IXC.

         (c)  DTI agrees to provide to GTE such information as deemed
              necessary by GTE for network planning in connector with this
              offering and as may be requested by GTE from time to time.

         (d)  DTI must provide the Signaling Point Codes of the IXCs for
              which it is providing call setup via GTE's SS7 signaling network,
              so that GTE screening and translation tables can be updated.

2.5      Technical Specifications. The technical specifications for the
         Services described above are defined in Bellcore TR-TSV-000905. GTE
         will provide SS7 via OR-394-SS7 and/or OR-317-SS7 format(s).

                                     J-2
<PAGE>   190

2.6      Other Services. If DTI desires to order SS7-related services other than
         the Service, such services will be governed by separate agreements.

2.7  
         Applicable Traffic. The Service applies to the traffic of DTI
         and its subtending LECs only. DTI must provide GTE with thirty (30)
         calendar days' written notice and a letter of agency before the
         traffic of any party other than DTI or its subtending LECs may be
         transmitted through DTI's facilities on to GTE's SS7 network.
     
                                   ARTICLE 3.
                             MANNER OF PROVISIONING

3.1      Link Facilities. The link facilities to GTE STPs in the same LATA can
         be either:
     
         (a)  "a" Link sets from DTI's SP or SSP.  A minimum of two (2) links
              is  required, one (1) from the SP or SSP to each STP; or,
         
         (b)  "B" Link sets from DTI's STPs that are connected to GTE's mated
              pairs  of STPs. A minimum of four (4) links is required between
              the two (2)  pairs of STPs.

3.2      Port Termination.  An STP port termination is required for each        
         56 kbps  access link utilized for the Service. STP locations are set
         forth in the National Exchange Carrier Association, Inc. (NECA)
         Tariff, F.C.C. No. 4.

3.3      Signaling Point Codes. GTE shall install all applicable Signaling Point
         codes for each signaling link at each of GTE's interconnecting STPs.

3.4      Protocol. GTE shall provision the Service in accordance with
         ANSI T1.226  Telecommunications Operations, Administration,
         Maintenance, and Provisioning (OAM&P) -Management of functions for
         Signaling System No. 7 (SS7) Network Interconnections (ATIS) with the
         exception of references to OMAP protocol elements. The Service cannot
         be established until Compatibility Testing has been successfully
         completed between DTI and GTE.

3.5      56 kbps Channel. Unless DTI elects to provide such links, GTE
         shall provide two (2) or four (4) 56 kbps circuits as link facilities
         at rates set forth in Article 4 herein. If approved by GTE, DTI may
         utilize a 56 kbps channel of an intraLATA DS1 (1.544 mbps) facility,
         which is in place at the time of ordering, as an "A" Link or a "B"
         Link, for the STP access connection between the SPOI and GTE's STP.
         WHEN THIS OPTION IS CHOSEN, DTI UNDERSTANDS AND ACCEPTS THAT THE
         SERVICE PERFORMANCE STANDARDS AS OUTLINED IN BELLCORE DOCUMENT
         TR-TSV-000905 MAY NOT BE MET IN THE PROVISION OF THE TOTAL SERVICE. If
         such a channel is not utilized, DTI must order DS1 (1.544 Mbps)
         service.

3.6      Multiplexing. Where technically required, GTE shall provide 
         multiplexing arrangements to DTI at no charge.

3.7      Diversity. Where technically feasible and not unreasonably economically
         burdensome, GTE agrees to allow interoffice and intraoffice diversity.
    
                                   ARTICLE 4.
                                RATES AND CHARGES

4.1      Payment. DTI agrees to pay to GTE for the Service at the rates and 
         charges set forth in Exhibit A attached to this Appendix and made a
         part hereof.

                                     J-3
<PAGE>   191

4.2      Period. Subject to Article 4.3 below, the rates and charges
         shall remain in effect and are firm for a period of twelve (12) months
         from the effective date of this Appendix. Thereafter, GTE shall give
         DTI sixty (60) calendar days' notice of any price change. If the new
         prices are not acceptable to DTI, DTI may terminate this Appendix upon
         thirty (30) calendar days' advance written notice without penalties
         for either Party.

4.3      Rate Basis. The rates are based upon rates and charges
         reflected in GTE's approved CCS/SS7 interconnection tariffs. To the
         extent that tariff rates are adjusted, rates and charges for similar
         rate elements in this Appendix will be adjusted accordingly on the
         date the new tariff rates become effective. If a state or federal
         regulatory agency requires, or GTE elects, to offer the Service by
         tariff, the tariff shall supersede this Appendix. If the Service
         becomes tariffed, DTI has the right to terminate this Appendix upon
         sixty (60) calendar days' advance written notice effective on the
         effective date of such tariff, without penalty to either Party.

4.4      Mileage. Mileage is calculated on the airline distance between
         the locations involved, using the V&H coordinates method, as set forth
         in the National Exchange Carrier Association, Inc. Tariff, F.C.C. No.
         4.

4.5      Rates and Charges. Rates and charges for each component of the Service
         are described as follows: 

         (a)  "A" Link connection - Charges for the "a" Link connection to
              GTE's  CCS/SS7 network consist of the STP port termination
              charges.
                  
              (1)  The STP port termination charges are for the termination of
                   a 56 kbps channel at each STP from DTI's SSP or SP.

              (2)  DTI will lease facilities between its SSPs/SPs and GTE's 
                   STPs.

         (b)  "B" Link connection - Charges for the "B" Link connection to
              GTE's  CCS/SS7 network consist of the STP port termination
              charges.

              (1)  The STP port termination charges are for the termination of
                   a 56 kbps channel at each STP from DTI's STPs.

              (2)  DTI and GTE shall mutually agree upon the rates for "B" 
                   Link interconnections within thirty (30) calendar days of 
                   the execution of this Agreement.
         
         (c)  STP Interconnection nonrecurring charge - STP interconnection
              nonrecurring charge shall apply for each "A" Link and "B" Link
              interconnection to GTE's SS7 network.

4.6      Rearrangement. Charges for rearrangement of the Service that
         are not specifically addressed will be determined by GTE on an
         individual case basis.

4.7      Applicable Traffic. The rates apply only to the traffic of DTI
         and its subtending LECs. Any traffic from any other party will be
         subject to additional charges.


                                   ARTICLE 5.
                              ORDERING THE SERVICE

5.1      Order. To order the Service, DTI shall submit a completed
         CCS/SS7 Order Form to GTE. DTI may change its Service order by
         submitting a new Order Form which shall be effective when executed by
         both Parties. Service shall be implemented for DTI thirty (30)
         calendar days after the execution of this Agreement by both Parties.

                                     J-4
<PAGE>   192

5.2      Port Terminations. GTE shall reserve STP port terminations only
         upon receipt of a fully executed copy of this Agreement and the Order
         Form referred to in this Appendix. GTE shall reserve ports on a first
         come, first served basis. Should DTI fail to use a port within sixty
         (60) Business Days of availability, GTE may reassign the port and, DTI
         must resubmit an Order Form for interconnection. 

                                   ARTICLE 6.
                             RESPONSIBILITIES OF GTE

6.1      Managing the Network. GTE is responsible for managing the
         network provided by GTE as part of the Service and applying protective
         controls which it can invoke as a result of occurrences including, but
         not limited to, failure or overload of GTE or DTI facilities due to
         natural disasters, mass calling or national security demands.

6.2      Performance Standards. GTE is responsible for meeting service
         performance standards as outlined in Bellcore TR-TSV-000905 except as
         otherwise provided herein.

6.3      Invoice. GTE shall include with the monthly invoice such data
         GTE and DTI mutually agree is necessary for DTI to verify the accuracy
         of the billing it receives from GTE for the Service.

                                   ARTICLE 7.
                            RESPONSIBILITIES OF DTI

7.1      Signaling Link. DTI shall provision the signaling links from its 
         premises to the SPOIs in a manner technically compatible to the GTE 
         network.

7.2      Privacy Indicator. DTI shall populate the "privacy indicator"
         portion of the CCS/SS7 initial address message forwarded to GTE's
         network for call processing.

7.3      Accuracy of Information. DTI shall verify the accuracy of information
         provided by DTI concerning the Service ordered by DTI.

7.4      Forecast. DTI shall furnish to GTE, at the time the Service is
         ordered and annually thereafter, an updated three year forecast of
         usage for the 56 kbps channel and the STP port termination for each
         STP pair. The forecast shall include total annual volume and busy hour
         busy month volume. GTE shall utilize the forecast in its own efforts
         to project further facility requirements.

7.5      Changes. DTI agrees to inform GTE in writing at least thirty
         (30) Business Days in advance of any change in its use of the Service
         that alters by ten percent (10%) or more for any thirty (30) day
         period the volume of signaling transactions to be forwarded to GTE's
         CCS/SS7 network. DTI will provide the reason for the change in volume
         by individual SS7 service.

                                   ARTICLE 8.
                             SIGNALING POINT CODES

8.1      Interconnection. DTI may utilize either the GTE CCS/SS7 network
         SPC or its own SPC for interconnection purposes when interconnecting
         its SPs or SSPs at the "A" Link level. DTI shall utilize its own SPC
         when interconnecting its STP at the "B" Link level. DTI agrees to
         obtain its own initial SPC if it has short or long range plans to
         provide its own STPs.

8.2      SPC. When the SPC is utilized, GTE shall be responsible for DTI
         code assignment. When DTI obtains its own SPC, DTI shall be
         responsible for code assignments and shall be responsible for
         notifying GTE and other CCS/SS7 network providers of such assignments.

                                     J-5
<PAGE>   193

8.3      SPC Change. Due to the complexities and potential DTI signaling
         network downtime required for changing working SPCs, DTI agrees to
         give GTE a written notice of an SPC change as soon as possible but no
         later than thirty (30) Business Days prior to the effective date of
         the SPC change.

                                   ARTICLE 9.
                                MONTHLY BILLING

Billing statements shall be rendered monthly by GTE to DTI. The monthly charge
shall be the total of all monthly rate element charges associated with the
Service. Payment to GTE for bills rendered to DTI shall be due thirty (30)
calendar days after receipt of the invoice and DTI agrees to pay all billed
amounts. Beginning the day after the due date of the bill, interest charges of
twelve per cent (12%) per annum or the maximum allowed by law, whichever is
less, shall be added to DTI's bill. Payments shall be applied to the oldest
outstanding amounts first.

                                  ARTICLE 10.
                         LIABILITY AND INDEMNIFICATION

10.1     Release from Liability. Each Party releases the other from any
         liability for loss or damage arising out of errors, interruptions,
         defects, failures, delays, or malfunctions of the Service, including
         any and all associated equipment and data processing systems, not
         caused by gross negligence or willful misconduct. Any losses or
         damages for which either Party is held liable under this Agreement
         shall in no event exceed the amount of the charges for the Service
         during the period beginning at the time notice of the error,
         interruption, defect, failure, or malfunction is received, to the time
         Service is restored.

10.2     Limitation of Liability. IN ADDITION TO THE LIMITATION OF
         LIABILITY SET FORTH AT SECTION 24.4 OF ARTICLE III OF THE AGREEMENT,
         NEITHER PARTY SHALL BE LIABLE FOR ANY LOSS OF REVENUE OR PROFIT OR FOR
         ANY LOSS OR DAMAGE ARISING OUT OF THIS AGREEMENT OR OUT OF THE USE OF
         THE CCS OR ANY OF THE SERVICES PROVIDED UNDER THIS AGREEMENT THAT IS
         SUFFERED BY THE OTHER PARTY, WHETHER ARISING IN CONTRACT, TORT
         (INCLUDING WITHOUT LIMITATION NEGLIGENCE OR STRICT LIABILITY) OR
         OTHERWISE AND WHETHER OR NOT INFORMED OF THE POSSIBILITY OF SUCH
         DAMAGES IN ADVANCE. NEITHER PARTY SHALL BE LIABLE FOR ANY SPECIAL,
         INCIDENTAL, OR CONSEQUENTIAL DAMAGES.

10.3     Third Parties. Each Party agrees to release, defend, indemnify,
         and hold harmless the other Party from and against any and all losses,
         damages, or other liability, including reasonable attorneys' fees,
         that it may incur as a result of claims, demands, wrongful death
         actions, or other suits brought by third parties, arising out of the
         use of the Service and resulting from the gross negligence or willful
         misconduct by the indemnifying Party, its employees, agents, or
         contractors in the performance of this Agreement. In addition, to the
         extent that the Parties' interests do not conflict, DTI shall defend
         GTE against all end users' claims just as if DTI had provided such
         service to its end users with its own employees. In any event, DTI
         shall assert its tariff limitation of liability for the benefit of
         both GTE and DTI.

10.4     Infringement. Each Party agrees to release, defend, indemnify,
         and hold harmless the other Party from and against any claim, demands
         or suit that asserts any infringement or invasion of privacy or
         confidentiality of any person(s), caused or claimed to be caused,
         directly or indirectly, by the indemnifying Party's employees or
         equipment associated with provision of the Service. This includes, but
         is not limited to, suits arising from disclosure of any
         customer-specific information associated with either the originating
         or terminating numbers used to provision the Service.

                                     J-6
<PAGE>   194

10.5     No Warranties. IN ADDITION TO THE DISCLAIMER SET FORTH AT
         SECTION 24.3 OF ARTICLE III OF THE AGREEMENT, NEITHER GTE NOR DTI
         MAKES ANY REPRESENTATIONS OR WARRANTIES TO THE OTHER OR TO ANY THIRD
         PARTY CONCERNING THE SPECIFIC QUALITY OF ANY SERVICES PROVIDED UNDER
         OR IN CONNECTION WITH THIS APPENDIX, THAT THE SERVICES PROVIDED UNDER
         THIS APPENDIX WILL BE ERROR FREE OR THAT THE FACILITIES WILL OPERATE
         WITHOUT INTERRUPTION. GTE AND DTI DISCLAIM, WITHOUT LIMITATION, ANY
         WARRANTY OR GUARANTEE OF MERCHANTABILITY OR FITNESS FOR a PARTICULAR
         PURPOSE, ARISING FROM COURSE OF PERFORMANCE, COURSE OF DEALING OR FROM
         USAGES OF TRADE.

                                   ARTICLE 11.
                              RESERVATION OF RIGHTS

11.1     Rights Reserved. By entering into this Appendix to the Agreement, 
         neither Party waives, releases or compromises any rights it may have 
         to argue, in any federal or state regulatory proceeding (or in any 
         judicial appeal following such a proceeding), in support of, or
         in opposition to any position, including but not limited to: (a)
         Accounting for deregulated (or detariffed) data base services; (b)
         removal from regulated accounts of expenses and investment associated
         with deregulated (or detariffed) data base services; and (c) any other
         issue pertinent to regulation or deregulation of costs which were, are
         now, or may in the future be, associated with the provisions of data
         base services. Each Party expressly reserves all its rights in
         connection with such matters.

                                     J-7
<PAGE>   195
                                    EXHIBIT A

                                RATES AND CHARGES

                             for Interconnection at
                         GTE's ________-_______,____ STP
<TABLE>
<CAPTION>

                                                                          Rates & Charges
                        Rate Element                                Nonrecurring                Monthly
- -------------------------------------------------------------------------------------------------------

<S>       <C>                                                         <C>                       <C>    
1.        STP Port Termination for an "A" Link Per Port               $ 57.00                   $537.00
2.        STP Port Termination for a "B" Link Per Port                $ 57.00                   $537.00
3.        56 Kbps Digital Facility                                                              $2.25
          Dedicated Switched Access Transport
          Per Airline Mile
4.        56 Kbps Dedicated Switched Access Line                      $100.00                   $76.02
5.1.      544 Mbps (DS1) High Capacity Digital                                                  $20.12
          Facility
          Dedicated Switched Access Transport
          Per Airline Mile
6.        1.544 Mbps (DS1) Dedicated Switched Access                  $1500.00                  $297.71
          Line
7.        Facility Charge for "B" Links                               Depends negotiated
                                                                      interconnection agreement
8.        ISUP Charge per Interconnection                                                       $500.00
8.1       For ISUP Service an additional SCP charge shall apply per interconnection.
</TABLE>


                                     J-8
<PAGE>   196


                                                APPENDIX K
                                        POLE ATTACHMENT AGREEMENT
1.       Parties.

         This agreement (Agreement) is between GTE SOUTHWEST INCORPORATED, a 
         State of ______ corporation having its principal office
         at _______ ("GTE"), and DIGITAL TELEPORT, INC., a corporation of the
         State of ________, having its principal office at______________
         ("Licensee").

2.       Definitions.

2.1      "GTE's poles" or "GTE pole(s)" means a pole or poles solely
         owned by GTE, jointly owned by GTE and another entity, and space on
         poles obtained by GTE through arrangements with the owner(s) thereof.

2.2      "Telecommunications Services" means the offering of telecommunications 
         for a fee directly to the public, or to such classes of users as to 
         be effectively available directly to the public, regardless of the 
         facilities used.

2.3      "Cable Television Services" means the transmission to
         subscribers of off-the-air pickup of broadcast signals or the
         transmission, without separate charge, of locally originated closed
         circuit television to the subscribers of off-the-air service.

2.4      "Attachments" means the equipment reasonably required by Licensee 
         to provide its Telecommunications Services or Cable Television
         Services that is placed on GTE's poles.

2.5      "Make-Ready Work" means all work, including, but not limited to,
         rearrangement, removal, or transfer of existing attachments, placement,
         repair, or replacement of poles, or any other changes required to
         accommodate the Licensee's Attachments on a pole.

2.6      "Hazardous Materials" means (i) any substance, material or waste
         now or hereafter defined or characterized as hazardous, extremely
         hazardous, toxic or dangerous within the meaning of the Comprehensive
         Environmental Response, Compensation and Liability Act of 1980, as
         amended, or any similar law, ordinance, statute, rule or regulation of
         any governmental body or authority, (ii) any substance, material or
         waste now or hereafter classified as a contaminant or pollutant under
         any law, ordinance, statute, rule or regulation of any governmental
         body or authority or (iii) any other substance, material or waste, the
         manufacture, processing, distribution, use, treatment, storage,
         placement, disposal, removal or transportation of which is now or
         hereafter subject to regulation under any law, ordinance, statute, rule
         or regulation of any governmental body or authority.

2.7      "Attachment Fee" means the fee assessed per pole and paid by
         Licensee to place Attachments on GTE's poles.

3.       Purpose.

3.1      Licensee represents to GTE that Licensee has a need to occupy,
         place and maintain Attachments on GTE's poles for the purpose of
         providing Telecommunications Services.

3.2      GTE agrees to permit Licensee to occupy, place and maintain its
         Attachments on such GTE poles as GTE may allow pursuant to the terms of
         this Agreement.

                                     K-1
<PAGE>   197

4.       Grant of License.

         GTE grants to Licensee and Licensee accepts from GTE a
         non-exclusive revocable license to occupy, place and maintain in a
         designated space on specified GTE poles Licensee's Attachments on the
         terms and conditions set forth herein. Licensee shall have no further
         right, title, or other interest in connection with GTE's poles. GTE
         shall have the right to grant, renew or extend privileges to others not
         parties to this Agreement to occupy, place or maintain Attachments on
         or otherwise use any or all GTE poles. Nothing herein is intended to,
         nor should it be construed to require GTE to construct or modify any
         facilities not needed for its own service requirements. GTE grants this
         license in reliance on the representation of Licensee that Licensee
         intends to provide Telecommunications Services with the Attachments
         covered by this Agreement.

5.       Term.
  
         Subject to the termination provisions contained in this
         Agreement, the term of this Agreement shall be two (2) years from the
         effective date referenced in the first paragraph of this Agreement and
         shall continue in effect for consecutive one (1) year terms until
         either Party gives the other Party at least ninety (90) calendar days
         written notice of termination, which termination shall be effective at
         the end of the then-current term. In the event notice is given less
         than ninety (90) calendar days prior to the end of the current term,
         this Agreement shall remain in effect for ninety (90) calendar days
         after such notice is received, provided, that in no case shall the term
         be extended beyond ninety (90) calendar days after the end of the
         current term.

6.       Pole Attachment Requests (PARs).

6.1      Licensee shall submit a written Pole Attachment Request ("PAR")
         to GTE identifying the GTE poles upon which it desires to place
         Attachments. Each PAR shall be in a form specified by GTE and may be
         revised from time to time by GTE. All PARs submitted to GTE shall be
         processed on a first come, first served basis. GTE, in its sole
         judgment, will determine the availability of space on the GTE pole(s)
         specified in the PAR and will provide its response to the PAR within
         thirty (30) Business Days of its submission. Upon approval of the PAR,
         GTE shall return one copy thereof to Licensee bearing an endorsement
         acknowledging GTE's authorization. All Attachments placed on GTE's
         poles pursuant to an approved PAR shall become subject to all of the
         terms and conditions of this Agreement. Licensee may submit subsequent
         PARs for approval by GTE as needed. GTE is under no obligation to
         provide general information respecting the location and availability of
         GTE poles, except as may be necessary to process a PAR. No Attachment
         shall be placed on any GTE pole identified in a PAR until that PAR has
         been approved by GTE.

6.2      Licensee shall pay GTE a fee for processing a PAR to compensate
         GTE for the general administrative costs as well as the actual
         engineering costs reasonably incurred. The fee for engineering costs
         shall be computed by multiplying the fully loaded hourly rate for an
         engineer times the number of hours reasonably required by each engineer
         to inspect the GTE poles included in the PAR. GTE will charge its then
         current rates for administrative and engineering costs, as may be
         changed from time to time by GTE to remain consistent with prevailing
         costs.

6.3      Upon receiving an approved PAR, Licensee shall have the right,
         subject to the terms of this License, to place and maintain the
         facilities described in the PAR in the space designated on the GTE
         poles identified therein.

6.4      In the event Make-Ready Work is necessary to accommodate
         Licensee's Attachments, GTE shall notify Licensee of such fact and
         provide Licensee with a good faith estimate of the total cost of such
         Make-Ready Work needed to accommodate Licensee's Attachments. Within
         fifteen (15)


                                     K-2
<PAGE>   198

         days after receiving such notice from GTE, Licensee shall notify
         GTE either (1) that Licensee shall pay all of the costs actually
         incurred to perform the Make-Ready Work and shall pay the total
         estimated amount to GTE at least ten (10) days prior to the date the
         Make-Ready Work is to begin or (2) that it desires to cancel its PAR.

6.5      GTE shall not be responsible to Licensee for any loss sustained
         by Licensee by reason of the refusal or failure of any other party with
         attachments on GTE's poles to rearrange or modify its attachments as
         may be required to accommodate Licensee's Facilities.

6.6      Licensee is not authorized and shall have no right to place facilities 
         on any GTE pole unless that GTE pole is identified in an approved PAR.

7.       Availability of Information Regarding Space on Poles. GTE will
         provide information regarding the availability of pole space within
         thirty (30) Business Days of a written request by Licensee. Because GTE
         will endeavor to determine available space as quickly as possible, a
         shorter interval may be experienced for requests of a limited scope
         where physical field verification is not necessary. In the event the
         thirty (30) Business Day time frame cannot be met, GTE shall so advise
         Licensee and shall seek a mutually satisfactory alternative response
         date. No representation regarding the availability of space shall be
         made in the absence of a physical field verification.

8.       Authority to Place Attachments.

8.1      Before Licensee places any Attachments on GTE's poles pursuant
         to an approved PAR, Licensee shall submit evidence satisfactory to GTE
         of its authority to erect and maintain the facilities to be placed on
         GTE's poles within the public streets, highways and other thoroughfares
         or on private property. Licensee shall be solely responsible for
         obtaining all rights-of-way, easements, licenses, authorizations,
         permits and consents from federal, state and municipal authorities or
         private property owners that may be required to place Attachments on
         GTE's poles. In the event Licensee must obtain any additional
         easements, permits, approvals, licenses and/or authorizations from any
         governmental authority or private individual or entity in order to
         utilize GTE's poles under an approved PAR, GTE shall, upon Licensee's
         request, provide written confirmation of its consent to Licensee's
         utilization of poles in a particular location in accordance with this
         Agreement, if needed by Licensee to obtain such additional approvals or
         authorizations. GTE shall also provide maps or drawings of its
         facilities' locations to the extent reasonably required by such
         governmental authority or private individual or entity for purposes of
         considering or granting Licensee's request to it for authority or
         approval.

8.2      GTE shall not unreasonably intervene in or attempt to delay the
         granting of any rights-of-way, easements, licenses, authorizations,
         permits and consents from federal, state or municipal authorities or
         private property owners that may be required for Licensee to place its
         Attachments on GTE's poles.

8.3      If any right-of-way, easement, license, authorization, permit or
         consent obtained by Licensee is subsequently revoked or denied for any
         reason, Licensee's permission to attach to GTE's poles shall terminate
         immediately and Licensee shall promptly remove its Attachments. Should
         Licensee fail to remove its Attachments within one hundred twenty (120)
         days of receiving notice to do so from GTE, GTE shall have the option
         to remove all such Attachments and store them in a public warehouse or
         elsewhere at the expense of and for the account of Licensee without GTE
         being deemed guilty of trespass or conversion, and without GTE becoming
         liable for any loss or damages to Licensee occasioned thereby. All
         costs incurred by GTE to remove Licensee's Attachments shall be
         reimbursed to GTE by Licensee upon demand.

                                     K-3

<PAGE>   199

8.4      Upon notice from GTE to Licensee that the cessation of the use
         of any one or more of GTE's poles is necessary for reasons of safety
         or has been directed by any federal, state or municipal authority, or
         private property owner, permission to attach to such pole or poles
         shall terminate immediately and Licensee promptly shall remove its
         Attachments. Should Licensee fail to remove its Attachments within the
         time frame provided by the requesting or directing party or one
         hundred twenty (120) days of receiving notice to do so from GTE,
         whichever is less, GTE shall have the option to remove all such
         Attachments and store them in a public warehouse or elsewhere at the
         expense of and for the account of Licensee without GTE being deemed
         guilty of trespass or conversion, and without GTE becoming liable for
         any loss or damages to Licensee occasioned thereby. All costs incurred
         by GTE to remove Licensee's Attachments shall be reimbursed to GTE by
         Licensee upon demand by GTE.

9.       Placement of Attachments.

9.1      Licensee shall, at its own expense, place and maintain its Attachments
         on GTE's poles in accordance with (I) such requirements and
         specifications as GTE shall from time to time prescribe in
         writing, (ii) all rules or orders now in effect or that hereafter may
         be issued by any regulatory agency or other authority having
         jurisdiction, and (iii) all currently applicable requirements and
         specifications of the National Electrical Safety Code, and the
         applicable rules and regulations of the Occupational Safety and Health
         Act. Licensee agrees to comply, at its sole risk and expense, with all
         specifications included in Exhibits __ through __ hereto, as may be 
         revised from time to time by GTE.

9.2      Licensee's Facilities shall be tagged at maximum intervals of 300 feet
         so as to identify Licensee as the owner of the Facilities. The tags
         shall be of sufficient size and lettering so as to be easily
         read from ground level.

10.      Failure of Licensee to Place Attachments.
         Once Licensee has obtained an approved PAR, Licensee shall have sixty
         (60) days from the date the PAR is approved to begin the placement of
         its Attachments on the GTE poles covered by the PAR. If Licensee has
         not begun placing its Attachments within that sixty (60) day period,
         Licensee shall so advise GTE with a written explanation for the delay.
         If Licensee fails to advise GTE of its delay, with a written
         explanation therefor, or if Licensee fails to act in good faith by
         not making a bona fide effort to begin placing its Attachments within
         the sixty (60) days prescribed by this Section, the previously
         approved PAR shall be deemed rescinded by GTE and Licensee shall have
         no further right to place Attachments pursuant to that PAR.

11.      Attachment Fees.

11.1     Licensee shall pay to GTE an Attachment Fee, as specified in 
         Exhibit ___    hereto, for each GTE pole upon which Licensee obtains
         authorization to place an Attachment. The Attachment Fee may be
         increased by GTE from time to time as permitted by law upon sixty (60)
         days written notice to Licensee.

11.2     Attachments Fees shall become due and payable on the date a PAR is
         approved by GTE for all GTE poles identified in that PAR on a pro rata
         basis until the end of the then current year and thereafter on an
         annual basis within thirty (30) days of the date of a statement from
         GTE specifying the fees to be paid. Any payment after thirty (30) days
         shall bear interest at the rate of eighteen percent (18%) per annum or
         the maximum rate allowed by law, whichever is less.

11.3     GTE shall maintain an inventory of the total number of GTE poles
         occupied by Licensee based upon the cumulative number of poles
         specified in all PARs  approved by GTE. GTE may, at its

                                     K-4
<PAGE>   200

         option, conduct a physical inventory of Licensee's Attachments under
         this Section. It shall be Licensee's sole responsibility to notify GTE
         of any and all removals of Attachments from GTE's poles. Except as
         provided in Section 18 of this Agreement in connection with the
         termination of this Agreement, such notice shall be provided to GTE at
         least thirty (30) days prior to the removal of the Attachments. Each
         Notice of Removal shall be in a form specified by GTE and may be
         revised from time to time at GTE's sole discretion. Licensee shall
         remain liable for Attachment Fees until Licensee's Attachments have
         been physically removed from GTE's poles.

12.      Modifications, Additions or Replacements to Existing Attachments.

12.1     Licensee shall not modify, add to or replace Facilities on any
         pre-existing Attachment without first notifying GTE in writing of the
         intended modification, addition or replacement at least thirty
         (30) days prior to the date the activity is scheduled to begin. The
         required notification shall include: (1) the date the activity is
         scheduled to begin, (2) a description of the planned modification,
         addition or replacement, (3) a representation that the modification,
         addition or replacement will not require any space other than the
         space previously designated for Licensee's Attachments, and (4) a
         representation that the modification, addition or replacement will not
         impair the structural integrity of the poles involved.

12.2     Should GTE determine that the modification, addition or replacement
         specified by Licensee in its notice will require more space than that  
         allocated to Licensee or will require the reinforcement of,
         replacement of or an addition of support equipment to the poles
         involved in order to accommodate Licensee's modification, addition or
         replacement, GTE will so notify Licensee, whereupon Licensee will be
         required to submit a PAR in compliance with this Agreement in order to
         obtain authorization for the modification, addition or replacement of
         its Attachments.

12.3     Access to GTE's poles for repairs, modifications, additions, or
         replacements required in emergency situations shall be governed by 
         Section 22 of this Agreement.

12.4     Should Licensee request GTE to expand capacity or purchase additional
         plant, Licensee agrees to pay all costs.

13.      Rearrangements to Accommodate Other Licensees. 

         Licensee acknowledges that at some point in the future it may become
         necessary to rearrange Licensee's Facilities in order to create space
         to accommodate the facilities of another licensee. Licensee agrees
         that in such event Licensee will cooperate in good faith with such
         other licensee to come to a mutually agreeable understanding regarding
         the manner in which the rearrangement of Licensee's Facilities will be
         achieved.
        
14.      Unauthorized Attachments.

14.1     The parties agree that because it would be impracticable and extremely
         difficult to determine the actual amount of damages resulting from     
         Licensee's unauthorized Attachment(s), a charge equal to five (5)
         times the amount of the then current Attachment Fee shall be paid by
         Licensee to GTE for each unauthorized Attachment to a GTE pole. Such
         payment shall be deemed liquidated damages and not a penalty. Licensee
         also shall pay GTE an Attachment Fee for each unauthorized Attachment
         accruing from the date the unauthorized Attachment was first placed on
         the GTE pole. In the event that the date the unauthorized Attachment
         was first placed on a GTE pole cannot be determined, such date shall
         be deemed the date of the last physical inventory made in accordance
         with this Agreement or, if no physical inventory has been conducted,
         the date the first PAR from Licensee was approved in accordance with
         this Agreement. Licensee also shall pay to GTE all costs incurred by
         GTE to rearrange any 

                                      K-5
<PAGE>   201

         unauthorized Attachment(s) of Licensee if such rearrangement is
         required to safeguard GTE's Attachment(s) or to accommodate the
         Attachment(s) of another party whose Attachment(s) would not
         have required a rearrangement but for the presence of Licensee's
         unauthorized Attachment(s). Licensee shall also pay to GTE all costs
         incurred by GTE to reinforce, replace or modify any GTE pole, which
         reinforcement, replacement or modification was required as a result of
         the unauthorized Attachment of Licensee. The Attachment Fee referenced
         in this subsection 14.1 shall be determined in the same manner as such
         fee would have been determined if the attachment had been authorized
         by GTE.

14.2     For purposes of this section, an unauthorized Attachment shall 
         include, but not be limited to:
     
         14.2.1    An Attachment to a GTE pole which pole is not identified in 
                   any PAR approved in accordance with this Agreement;

         14.2.2    An Attachment that occupies more space than that allocated to
                   Licensee by GTE; 
     
         14.2.3    An Attachment that is not placed in accordance with the 
                   provisions of this Agreement or the appropriate PAR issued 
                   pursuant to this Agreement;

         14.2.4    An addition or modification by Licensee to its pre-existing
                   Attachment(s) that impairs the structural integrity of the
                   involved GTE pole(s).
         
         14.2.5    An Attachment that consists of facilities owned or controlled
                   by, and for the use of a party other than Licensee.

15.      Surveys and Inspections of Pole Attachments.

15.1     Upon written notice to Licensee, the total number and exact location
         of Licensee's Attachments on GTE's poles may be determined, at GTE's   
         discretion, through a survey to be made not more than once per
         calendar year by GTE. If so requested, Licensee and/or any other
         entity owning or jointly owning the poles with GTE may participate in
         the survey. The costs incurred by GTE to conduct the survey shall be
         reimbursed to GTE by Licensee upon demand by GTE. If the Attachments
         of more than one Licensee are surveyed, each such Licensee shall
         contribute a proportionate share of the costs reimbursed to GTE.

15.2     Apart from surveys conducted in accordance with this section, GTE
         shall have the right to inspect any Attachment of Licensee on GTE's
         poles as conditions may warrant upon written notice to Licensee.
         Licensee shall, upon demand by GTE, reimburse GTE all costs incurred
         to conduct its inspection. No joint survey or inspector, or lack
         thereof, by GTE shall operate to relieve Licensee of any
         responsibility, obligation or liability assumed under this Agreement.

16.      Notice of Modification or Alteration of Poles by GTE.

16.1     In the event GTE plans to modify or alter any GTE pole(s) upon which
         Licensee has Attachments, GTE shall provide Licensee notice of the
         proposed modification or alteration at least thirty (30) days
         prior to the time the proposed modification or alteration is scheduled
         to take place. Should Licensee decide to modify or alter its
         Attachments on the GTE poles to be modified or altered by GTE,
         Licensee shall so notify GTE in writing. In such event, Licensee shall
         bear a proportionate share of the total costs incurred by GTE to make
         such poles accessible to Licensee.

16.2     In the event GTE is required by a federal, state, or local authority
         to move, replace or change the location of any GTE pole(s), Licensee
         shall concurrently relocate Licensee's Attachments. GTE

                                      K-6
<PAGE>   202

         and each Licensee required to relocate its Attachments shall bear its
         own costs for such relocation.

17.      Disclaimer of Warranties.
    
         EXCEPT AS SPECIFICALLY SET FORTH IN THIS AGREEMENT, GTE MAKES NO       
         WARRANTIES, EXPRESS OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, ANY
         IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR a PARTICULAR
         PURPOSE.

18.      Default and Remedies.

18.1     The occurrence of any one of the following shall be deemed a Material
         Default by Licensee under this Agreement:

         18.1.1    Failure by Licensee to pay any fee or other sum required to 
                   be paid under the terms of this Agreement and such default
                   continues for a period of ten (10) days after written
                   notice thereof to Licensee;

         18.1.2    Failure by Licensee to perform or observe any other term,
                   condition, covenant, obligation or provision of this
                   Agreement and such default continues for a period of thirty
                   (30) days after written notice thereof from GTE
                   (provided that if such default is not curable within such
                   thirty (30) day period, the period will be extended if
                   Licensee commences to cure such default within such thirty
                   (30) day period and proceeds diligently thereafter to effect
                   such cure);


         18.1.3    The filing of any tax or mechanic's lien against GTE's poles
                   which is not bonded or discharged within thirty (30) days of
                   the date Licensee receives notice that such lien has been 
                   filed;

         18.1.4    Licensee's voluntary or involuntary bankruptcy;
         
         18.1.5    Licensee's knowing use or maintenance of its Attachments in
                   violation of any law or regulation, or in aid of any 
                   unlawful act or undertaking;

         18.1.6    If any authorization which may be required of the Licensee 
                   by any governmental or private authority for the placement,
                   operation or maintenance of Licensee's Attachments is denied
                   or revoked.

18.2     In the event of a Material Default, GTE, without any further notice to
         the Licensee (except where expressly provided for below or required by 
         applicable law) may do any one or more of the following:

         18.2.1    Perform, on behalf and at the expense of Licensee, any 
                   obligation of Licensee under this Agreement which Licensee
                   has failed to perform and of which GTE shall have
                   given Licensee notice, the cost of which performance shall
                   be paid by Licensee to GTE upon demand;

         18.2.2    Terminate this Agreement by giving notice of such 
                   termination to Licensee and remove Licensee's Attachments
                   and store them in a  public warehouse or elsewhere at the
                   expense of and for the account of Licensee without GTE being
                   deemed guilty of trespass or conversion, and without GTE
                   becoming liable for any loss or damages to Licensee
                   occasioned thereby; or

                                      K-7
<PAGE>   203

         18.2.3    Exercise any other legal or equitable right or remedy which
                   GTE may have.

18.3     Any costs and expenses incurred by GTE (including, without limitation, 
         reasonable attorneys' fees) in enforcing this Agreement shall be
         repaid to GTE by Licensee upon demand.

18.4     Upon termination of this Agreement by GTE because of a material
         default by Licensee, Licensee shall remain liable to GTE for any
         and all fees, other payments and damages which may be due or sustained
         prior to such termination, all reasonable costs, fees and expenses,
         including, without limitation, reasonable attorneys' fees incurred by
         GTE in pursuit of its remedies hereunder, and additional liquidated
         damages which shall be an amount equal to one full year of Pole
         Attachment fees.

18.5     All rights and remedies of each party set forth in this Agreement
         shall be cumulative and none shall exclude any other right or remedy,
         now or hereafter allowed by or available under any statute, ordinance,
         rule of court, or the common law, either at law or in equity, or both.

19.      Indemnification.

19.1     Licensee shall compensate GTE for the full actual loss, damage or      
         destruction of GTE's property that in any way arises from or is
         related to this Agreement or activities undertaken pursuant to this
         Agreement (including, without limitation, the installation,
         construction, operation or maintenance of Licensee's Attachments).

19.2     Licensee will further indemnify, defend and hold harmless GTE and
         GTE's agents, officers, employees and assigns, from any and all
         losses, damages, costs, expenses (including, without limitation,
         reasonable attorneys' fees), statutory fines or penalties, actions or
         claims for personal injury (including death), damage to property, or
         other damage or financial loss of whatever nature in any way arising
         out of or connected with this Agreement or activities undertaken
         pursuant to this Agreement (including, without limitation, the
         installation, construction, operation or maintenance of Licensee's
         Attachments), except to the extent caused by the gross negligence or
         willful misconduct on the part of GTE or GTE's agents, officers,
         employees and assigns. Licensee further indemnifies GTE from
         subsequent taxes and fees that may be levied by municipalities ROWs in
         association with these agreements. Such fees that are levied would be
         in addition to the attachment/occupancy fees reflected in this
         Agreement. Licensee expressly assumes all liability for actions
         brought against GTE and GTE's agents, officers, employees and assigns,
         by Licensee's agents, officers or employees and Licensee expressly
         waives any immunity from the enforcement of this indemnification
         provision that might otherwise be provided by workers' compensation
         law or by other state or federal laws.

19.3     Without limiting any of the foregoing, Licensee assumes all risk of,
         and agrees to relieve GTE of any and all liability for, loss or damage
         (and the consequences of loss or damage) to any Attachments
         placed on GTE's poles and any other financial loss sustained by
         Licensee, whether caused by fire, extended coverage perils, or other
         casualty, except to the extent caused by the gross negligence or
         willful misconduct on the part of GTE or GTE's agents, officers,
         employees and assigns.

19.4     Without limiting the foregoing, Licensee expressly agrees to
         indemnify, defend and hold harmless GTE and GTE's agents, officers,
         employees and assigns from any and all claims asserted by customers
         of Licensee in any way arising out of or in connection with this
         Agreement or Licensee's Attachments, except to the extent caused by
         the gross negligence or willful misconduct on the part of GTE or GTE's
         agents, officers, employees and assigns.

                                      K-8
<PAGE>   204

19.5     Notwithstanding anything to the contrary in this Agreement, Licensee
         further shall indemnify and hold harmless GTE, its agents, officers,
         and assigns from and against any claims, liabilities, losses,
         damages, fines, penalties and costs (including, without limitation,
         reasonable attorneys' fees) whether foreseen or unforeseen, which the
         indemnified parties suffer or incur because of: (I) any discharge of
         Hazardous Waste resulting from acts or omissions of Licensee or the
         Licensee's predecessor in interest; (ii) acts or omissions of the
         Licensee, it agents, employees, contractors or representatives in
         connection with any cleanup required by law, or (iii) failure of
         Licensee to comply with Environmental, Safety and Health Laws.

19.6     In no event shall either party be liable to the other party for any
         special, consequential or indirect damages (including, without
         limitation, lost revenues and lost profits) arising out this
         Agreement or any obligation arising hereunder, whether in an action
         for or arising out of breach of contract, tort or otherwise.

19.7     Licensee shall indemnify, protect and hold harmless GTE from and
         against any and all claims for libel and slander, copyright
         and/or patent infringement arising directly or indirectly by reason of
         installation of Licensee's equipment on GTE's poles pursuant to this
         Agreement.

20.      Insurance.
     
         20.1      Licensee shall carry insurance, at its sole cost and expense,
                   sufficient to cover its indemnification obligations as set
                   forth in Section 19 of this Agreement. Such insurance shall
                   include, but not be limited to, coverage against
                   liability due to personal injury or death of persons in the
                   amount of $500,000 as to any one person and $1,000,000 as to
                   any one accident; coverage against liability due to property
                   damage in the amount of $500,000 as to each accident and
                   $500,000 aggregate; and coverage necessary to fully protect
                   both it and GTE from all claims under any worker's
                   compensation laws that may be applicable.

         20.2      All insurance required of Licensee under this Agreement shall
                   remain in force for the entire life of this Agreement. The
                   company or companies issuing such insurance shall be
                   approved by  GTE and GTE shall be named as an additional
                   insured in each such policy. Licensee shall submit to GTE
                   certificates by each insurer to the effect that the insurer
                   has insured Licensee for all potential liabilities of
                   Licensee under this Agreement, and that it will not cancel
                   or change any policy of insurance issued to Licensee except
                   upon thirty (30) days notice to GTE. In the event Licensee's
                   insurance coverage is to be canceled by reason of
                   non-payment of premiums due, GTE shall have the option of
                   paying any amount due and Licensee shall forthwith reimburse
                   GTE the full amount paid by GTE.

         20.3      Licensee shall promptly advise GTE in writing of any and all
                   claims for damages, including, but not limited to, damage to 
                   property or injury to or death of persons, allegedly arising
                   out of or in any manner related, directly or indirectly, to
                   the presence or use of Licensee's Attachments.

         20.4      Licensee shall furnish bond or satisfactory evidence of
                   contractual insurance coverage, the terms of which shall be
                   subject to GTE's approval, in the amount of ten thousand
                   dollars ($10,000) to guarantee the payment of any sums
                   which may become due to GTE for rentals, inspections or for
                   work performed by GTE for the benefit of Licensee under this
                   Agreement, including the removal of Licensee's equipment
                   pursuant to any of the provisions hereof. All bonds must
                   specify that GTE be notified thirty (30) days prior to the
                   expiration or cancellation of the policy.


                                       K-9
<PAGE>   205

21.      Taxes.
   
         Any state or local excise, sales, or use taxes (excluding any taxes
         levied on income) resulting from the performance of this Agreement
         shall be borne by the Party upon which the obligation for payment is
         imposed under applicable law, even if the obligation to collect and
         remit such taxes is placed upon the other Party. The collecting Party
         shall charge and collect from the obligated Party, and the obligated
         Party agrees to pay to the collecting Party, all applicable taxes,
         except to the extent that the obligated Party notifies the collecting
         Party and provides to the collecting Party appropriate documentation
         as GTE requires that qualifies the obligated Party for a full or
         partial exemption. Any such taxes shall be shown as separate items on
         applicable billing documents between the Parties. The obligated Party
         may contest the same in good faith, at its own expense, and shall be
         entitled to the benefit of any refund or recovery, provided that such
         Party shall not permit any lien to exist on any asset of the other
         Party by reason of the contest. The collecting Party shall cooperate
         in any such contest by the other Party. The other Party will indemnify
         the collecting Party from any sales or use taxes that may be
         subsequently levied on payments by the other Party by the collecting
         Party.

22.      Emergency Restoration Procedures.
    
         In the event of an emergency, restoration procedures may be affected
         by the presence of Licensee's Attachments. While GTE shall not be
         responsible for the repair of Licensee's Attachments that are damaged
         (except by mutual written agreement), GTE shall nonetheless control
         access to its poles if the restoration is to be achieved in an orderly
         fashion.

         22.1      Where GTE and Licensee are involved in emergency 
                   restorations, access to GTE's poles will be controlled by
                   GTE's Maintenance District Manager or his/her on-site
                   representative according to the following guidelines:

                   22.1.1    Service Disruptions/Outages

                        (a)  In the event of service disruptions and/or
                             outages, while exercising its right to first
                             access, GTE shall make all reasonable efforts to
                             grant access to as many other entities with
                             Attachments as is reasonably safe.

                        (b)  Where simultaneous access is not possible, access
                             will be granted by GTE on a first come, first
                             served basis.

                   22.1.2    Service Affecting Emergencies

                        (a)  In the event of service affecting emergencies not
                             resulting in service disruptions or outages, while
                             exercising its right to first access, GTE shall
                             make all reasonable efforts to grant access to as
                             many other entities with Attachments as is
                             reasonably safe.

                        (b)  Where GTE is unable to grant simultaneous access
                             to all other entities with Attachments, access
                             will granted according to the level of damage to
                             the Attachments of each entity and the likelihood
                             that a given level of damage will result in
                             service disruption. Where the likelihood that a
                             service disruption will result is not clearly
                             discernible, access will be on a first come, first
                             served basis.

         22.2      Without limiting any other indemnification or hold harmless
                   provisions of this Agreement, Licensee agrees that any 
                   decision by GTE regarding access to Attachments, or any 
                   action
               
                                      K-10
<PAGE>   206

                   or failure to act by GTE, under this Section 22 shall not
                   constitute a basis for any claim by Licensee against GTE for
                   any  damage to Licensee's Attachments or disruption of
                   Licensee's services, or any other direct or indirect damages
                   of any kind whatsoever incurred by Licensee.

23.      Damage Suspected to Licensee's Facilities Only.
     
         23.1      In the event Licensee receives information that Licensee's
                   Attachments are damaged, Licensee shall notify GTE of said
                   damage at a number to be provided later by GTE. This is a
                   24-hour, 7   days per week notification number. Licensee
                   shall provide GTE all information known to it regarding the
                   damage to Licensee's Attachments.

         23.2      In the event GTE receives notice that Licensee's Facilities
                   are damaged, GTE will notify Licensee of said damage by
                   telephone at the Licensee's emergency telephone number. GTE
                   shall provide Licensee all information known to it regarding
                   the damage to Licensee's Attachments.

         23.3      After the giving of such notice by either Licensee or GTE,
                   Licensee shall be authorized to perform emergency
                   restoration  maintenance activities in connection with
                   Licensee's Attachments, subject to the provisions of this
                   Agreement.

         23.4      Without limiting any other indemnification or hold harmless
                   provisions of this Agreement, Licensee agrees that any
                   decision by GTE regarding access to Licensee's Attachments,
                   or any action or failure to act by GTE, appropriately
                   or inappropriately, under this Section shall not be the
                   basis for any claim by Licensee against GTE for any damage
                   to Licensee's Attachments or disruption of Licensee's
                   services, or any other direct or indirect damages of any
                   kind whatsoever incurred by Licensee and Licensee shall
                   indemnify and hold GTE harmless from any such claim.

24.      Abandonment.
     
         Nothing in this Agreement shall prevent or be construed to prevent GTE
         from abandoning, selling, assigning or otherwise disposing of any
         poles or other GTE property used for Licensee's Attachments; provided,
         however, that GTE shall condition any such sale, assignment or other
         disposition subject to the rights granted to Licensee pursuant to this
         Agreement. GTE shall promptly notify Licensee of any proposed sale,
         assignment or other disposition of any poles or other GTE property
         used for Licensee's Attachments.

25.      Notices.
     
         Any written notice to be given to a party to this Agreement shall be
         in     writing and given or made by means of telegram, facsimile
         transmission, certified or registered mail, express mail or other
         overnight delivery service, or hand delivery, proper postage or other
         charges prepaid, and addressed or directed to the respective parties
         as follows:

               To Licensee:   _________________________
                              _________________________
                              _________________________ 


               To GTE:        _________________________
                              _________________________
                              _________________________

                                      K-11

<PAGE>   207

         Any notice given by personal delivery shall be deemed to have been 
         given on the day of actual delivery and, if given by registered or 
         certified mail, return receipt requested, on the date of receipt 
         thereof and, if given by facsimile transmission, on the day of 
         transmittal thereof if given during the normal business hours of the 
         recipient and on the next business day if not given during normal 
         business hours.

26.      Non-Waiver of Terms and Conditions.
    
         No course of dealing, course of performance or failure to enforce any
         of term, right, condition or other provision of this Agreement
         shall constitute or be construed as a waiver of any term, right or
         condition or other provision of this Agreement.

27.      Dispute Resolution.
   
         27.1      Except in the case of (i) a suit, action or proceeding by 
                   GTE to compel Licensee to comply with its obligations to
                   indemnify GTE pursuant to this Agreement or (ii) a
                   suit, action or proceeding to compel either party to comply
                   with the dispute resolution procedures set forth in this
                   section, the parties agree to use the following procedure to
                   resolve any dispute, controversy or claim arising out of or
                   relating to this Agreement or its breach.

         27.2      At the written request of a party, each party shall 
                   designate a knowledgeable, responsible representative to
                   meet and negotiate   in good faith to resolve any dispute,
                   controversy or claim arising under this Agreement. The
                   parties intend that these negotiations be conducted by
                   non-lawyer, business representatives. The substance of the
                   negotiations shall be left to the discretion of the
                   representatives. Upon mutual agreement, the representatives
                   may utilize other alternative dispute resolution procedures
                   such as mediation to assist in the negotiations. Discussions
                   and correspondence between the representatives for purposes
                   of these negotiations shall be treated as confidential,
                   undertaken for purposes of settlement, shall be exempt from
                   discovery and production, and shall not be admissible in the
                   arbitration described below or in any subsequent lawsuit
                   without the concurrence of all parties. Documents identified
                   in or provided during such negotiations, which are not
                   prepared for purposes of the negotiations, shall not be so
                   exempt and may, if otherwise admissible, be admitted as
                   evidence in any subsequent proceeding.

         27.3      If a resolution of the dispute, controversy or claim is not
                   reached within sixty (60) days of the initial written
                   request, the dispute, controversy or claim shall be
                   submitted to binding arbitration by a single arbitrator
                   pursuant to the rules of the American Arbitration
                   Association (AAA), except as hereinafter provided. Discovery
                   in any proceeding before the AAA shall be controlled by the
                   arbitrator and shall be permitted to the extent set forth in
                   this section. Parties may exchange, in any combination, up
                   to thirty-five (35) (none of which may contain subparts)
                   written interrogatories, demands to produce documents and
                   requests for admission. Each party may also to take the oral
                   deposition of one (1) witness. Additional discovery may be
                   permitted upon mutual agreement of the parties. The
                   arbitration hearing shall be commenced within sixty (60)
                   days of the demand for arbitration and shall be held in the
                   city where GTE's local offices are located. The arbitrator
                   shall rule on the dispute, controversy or claim by issuing a
                   written opinion within thirty (30) days after the close of
                   hearings. The times specified in this section may be
                   extended upon mutual agreement of the parties or by the
                   arbitrator upon a showing of good cause. Judgment upon the
                   award rendered by the arbitrator may be entered in any court
                   having jurisdiction.

         27.4      Each party shall bear its own costs, including attorneys' 
                   fees, incurred in connection with any of the foregoing
                   procedures. A party seeking discovery shall reimburse
                   the responding

                                      K-12
<PAGE>   208

                   party the cost of reproducing documents (to include search
                   time and reproduction time costs). The fees associated with
                   any arbitration, including the fees of the arbitrator, shall
                   be divided equally between the parties.

28.      Compliance With Laws.
     
         Notwithstanding anything to the contrary in this Agreement, each party
         shall ensure that any and all activities it undertakes pursuant to
         this   Agreement shall comply with all applicable laws, including,
         without limitation, all applicable provisions of (i) workers'
         compensation laws, (ii) unemployment compensation laws, (iii) the
         Federal Social Security Law, (iv) the Fair Labor Standards Act, and
         (v) all laws, regulations, rules, guidelines, policies, orders,
         permits and approvals of any governmental authority relating to
         environmental matters and/or occupational safety.

29.      Force Majeure.

         Neither party shall have any liability for its delays or its failure
         in performance due to fire, flood, explosion, pest damage, power
         failures, strikes or labor disputes, acts of God, the Elements,
         war, civil disturbances, acts of civil or military authorities or the
         public enemy, inability to secure raw materials, transportation
         facilities, fuel or energy shortages, or other cause beyond its
         control.

30.      Assignment. 

         30.1      The rights and obligations of Licensee under this Agreement
                   shall not be assigned, transferred or sub-licensed, in whole
                   or in part, without the prior written consent of GTE.
                   An assignment, transfer or sub-license of this Agreement by
                   Licensee shall not relieve Licensee of its obligations under
                   this Agreement. Any assignment attempted without the prior
                   written consent of GTE shall be void.

         30.2      GTE shall have the right to assign this Agreement and to 
                   assign its rights and delegate its obligations and
                   liabilities under this Agreement, either in whole or in
                   part. GTE shall provide notice to Licensee of any assignment
                   which shall state the effective date thereof. Upon the
                   effective date and to the extent of the assignment, GTE
                   shall be released and discharged from all obligations and
                   liabilities under this Agreement.

         30.3      Neither this Agreement nor any term or provision hereof, 
                   nor any inclusion by reference shall be construed as being
                   for the benefit of any person or entity not a signatory
                   hereto.

         30.4      This Agreement shall be binding upon and inure to the 
                   benefit of the parties hereto and their respective
                   successors and assigns.
        
31.      Applicable Law. 
         This Agreement, and the rights and obligations contained in it, shall
         be     governed and construed under the laws of the State of
         ____________ without  regard to its conflicts of laws provisions.

32.      Subsequent Law. 

         The terms and conditions of this Agreement shall be subject to any and
         all applicable laws, rules, regulations, guidelines, orders, or
         tariffs that are currently in force or that may be prescribed by any
         federal, state or local governmental authority. The parties agree
         to modify, in writing, the affected term(s) and condition(s) of this
         Agreement to bring them into compliance with such law, rule,
         regulation, guideline, order, or tariff. Should any term of this
         Agreement be determined by a

                                      K-13
 
<PAGE>   209

         court or other entity with competent jurisdiction to be unenforceable,
         all other terms of this Agreement shall remain in full force and
         effect.

33.      Headings. 

         All headings contained in this Agreement are for convenience only and
         are not intended to affect the meaning or interpretation of any
         part of this Agreement.

34.      Entire Agreement. 

         The terms and conditions of this Agreement supersede all prior oral or
         written understandings between the parties and constitute the entire   
         agreement between them concerning the subject matter of this
         Agreement. There are no understandings or representations, express or
         implied, not expressly set forth in this Agreement. This Agreement
         shall not be modified or amended except by a writing signed by the
         party to be charged.

IN WITNESS WHEREOF, the parties hereto have executed this Agreement through 
their authorized representatives. 


For GTE:                                     For Licensee: 

GTE

__________________________________           __________________________________ 
(Signature of Authorized Agent)              (Signature of Officer)
(Printed Name of Authorized Agent)           (Printed Name of Officer)
(Title)                                      (Title)
(Date)                                       (Date)


                                             ATTEST:

                                             Corporate Seal (If Applicable)

                                      K-14
<PAGE>   210


                                  EXHIBIT __
                                 ATTACHMENT FEES

                                      K-15
<PAGE>   211
                                   APPENDIX L
                           CONDUIT OCCUPANCY AGREEMENT


1.       Parties.
         This agreement (Agreement) is between GTE SOUTHWEST INCORPORATED, 
         a State of _______ corporation having its principal office at________ 
         ("GTE"), and DIGITAL TELEPORT, INC., a corporation of the State of
         _________ , having its principal office at_________ ("Licensee").

2.       Definitions.

         2.1       "GTE's conduit(s)" or "GTE conduit(s)" means any reinforced
                   passage or opening in, on, under/over or through the ground
                   capable of containing communications facilities.

         2.2       "Telecommunications Services" means the offering of
                   telecommunications for a fee directly to the public, or to
                   such classes of users as to be effectively available directly
                   to the public, regardless of the facilities used.

         2.3       "Cable Television Services" means the transmission to
                   subscribers of off-the-air pickup of broadcast signals or
                   the  transmission, without separate charge, of locally
                   originated closed circuit television to the subscribers of
                   off-the-air service.

         2.4       "Conduit" or "Duct" means a single enclosed raceway used to 
                   house Innerduct.

         2.5       "Innerduct," unless otherwise specified or approved by GTE, 
                   shall mean a single enclosed raceway 1" or 1-1/4" in 
                   diameter, placed within duct and used for housing 
                   communications facilities.

         2.6       "Facilities" means all facilities, including, but not limited
                   to, cables, equipment and associated hardware, owned and
                   utilized by the Licensee which occupy an innerduct.

         2.7       "Make-Ready Work" means all work, including, but not limited
                   to, rearrangement, removal, or transfer of existing
                   facilities, placement, repair, or replacement of duct or
                   innerduct, or any other changes required to accommodate the
                   Licensee's Facilities in a conduit.

         2.8       "Manholes" and "handholes" mean subsurface enclosures which
                   personnel may enter and use for the purpose of installing,
                   operating and maintaining communications facilities.

         2.9       "Hazardous Materials" means (I) any substance, material or
                   waste now or hereafter defined or characterized as hazardous,
                   extremely hazardous, toxic or dangerous within the meaning of
                   the Comprehensive Environmental Response, Compensation and
                   Liability Act of 1980, as amended, or any similar law,
                   ordinance, statute, rule or regulation of any governmental
                   body or authority, (ii) any substance, material or waste now
                   or hereafter classified as a contaminant or pollutant under
                   any law, ordinance, statute, rule or regulation of any
                   governmental body or authority or (iii) any other substance,
                   material or waste, the manufacture, processing, distribution,
                   use, treatment, storage, placement, disposal, removal or
                   transportation of which is now or hereafter subject to
                   regulation under any law, ordinance, statute, rule or
                   regulation of any governmental body or authority.

         2.10      "Occupancy Fee" means the fee paid by Licensee to GTE per
                   linear foot for each innerduct occupied by Licensee's
                   Facilities in GTE's Conduit(s).
 

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<PAGE>   212


3.       Purpose.

         Licensee represents to GTE that Licensee has a need to occupy, place
         and maintain communications facilities within GTE's conduit(s) for the
         purpose of providing Telecommunications Service. GTE agrees to permit
         Licensee to occupy, place and maintain communications facilities within
         GTE's conduit(s) as GTE may allow pursuant to the terms of this
         Agreement.

4.       Grant of License.

         GTE grants to Licensee and Licensee accepts from GTE a non-exclusive
         revocable license to occupy, place and maintain in a designated space
         in specified GTE conduits Licensee's Facilities on the terms and
         conditions set forth herein. Licensee shall have no further right,
         title, or other interest in connection with GTE's conduit(s). GTE shall
         have the right to grant, renew or extend privileges to others not
         parties to this Agreement to occupy, place and maintain facilities in
         or otherwise use any or all of GTE's conduit(s). Nothing herein is
         intended to, nor should it be construed to require GTE to construct or
         modify any facilities not needed for its own service requirements. GTE
         grants this license in reliance on the representation of Licensee that
         Licensee intends to provide Telecommunications Service with Licensee's
         Facilities covered by this Agreement.

5.       Term.

         Subject to the termination provisions contained in this Agreement, the
         term of this Agreement shall be two (2) years from the effective date
         referenced in the first paragraph of this Agreement and shall continue
         in effect for consecutive one (1) year terms until either Party gives
         the other Party at least ninety (90) calendar days written notice of
         termination, which termination shall be effective at the end of the
         then-current term. In the event notice is given less than ninety (90)
         calendar days prior to the end of the current term, this Agreement
         shall remain in effect for ninety (90) calendar days after such notice
         is received, provided, that in no case shall the term be extended
         beyond ninety (90) calendar days after the end of the current term.

6.       Conduit Occupancy Requests.

         6.1       Upon execution of this Agreement, Licensee shall have the
                   right to submit a written Conduit Occupancy Request ("COR")
                   to   GTE specifying the GTE conduits in which it desires to
                   place its Facilities. Each COR shall be in a form specified
                   by GTE, which form may be revised from time to time by GTE.
                   CORs received by GTE shall be processed on a first come,
                   first served basis. GTE will determine the availability of
                   space for Licensee's Facilities in the GTE conduit(s)
                   specified in the COR within thirty (30) Business Days of its
                   submission. Upon approval of the COR, GTE shall return a
                   copy thereof to Licensee bearing an endorsement
                   acknowledging GTE's authorization. All of Licensee's
                   Facilities placed in GTE's conduit(s) pursuant to an
                   approved COR shall become subject to all of the terms and
                   conditions of this Agreement. Licensee may submit subsequent
                   CORs for approval by GTE as needed. All of Licensee's
                   Facilities shall be placed in innerduct unless otherwise
                   approved by GTE. No facilities of any kind shall be placed
                   in any GTE conduit(s) identified in a COR until that COR has
                   been approved by GTE.

         6.2       Licensee shall pay GTE a fee for processing a COR to
                   compensate GTE for the general administrative costs as well
                   as the actual engineering costs reasonably incurred. The
                   fee for engineering costs shall be computed by multiplying
                   the fully loaded hourly rate for an engineer times the
                   number of hours reasonably required by each engineer to
                   inspect the GTE conduits included in the COR. GTE will
                   charge its then current rates for 


                                      L-2

<PAGE>   213
                   administrative and engineering costs, as may be changed
                   from time to time by GTE to remain consistent with
                   prevailing costs.

         6.3       Upon receiving an approved COR, Licensee shall have the
                   right, subject to the terms of this Agreement, to
                   place and maintain Licensee's Facilities described in the
                   COR in the innerducts of the GTE conduit(s) identified
                   therein.

         6.4       In the event Make-Ready Work is necessary to accommodate
                   Licensee's Facilities, GTE shall notify Licensee of such
                   fact and provide Licensee with an estimate of the total cost
                   of such Make-Ready Work. Within fifteen (15) days after
                   receiving such notice from GTE, Licensee shall notify GTE
                   either (1) that Licensee shall pay all of the costs actually
                   incurred to perform the Make-Ready Work and shall pay the
                   total estimated amount to GTE at least ten (10) days prior
                   to the date the Make-Ready Work is to begin or (2) that it
                   desires to cancel its COR.

         6.5       Nothing herein shall confer any right upon Licensee to place 
                   power cables or related power equipment in GTE conduit(s) or
                   Manholes. Licensee shall place equipment of this nature in
                   its own pull boxes outside of GTE's Conduit(s) or Manholes.
                   Cable connectors or splicing devices shall not be used by
                   Licensee in GTE's conduit(s) or innerducts.

7.       Availability of Conduit Maps.

         Existing conduit maps will be made available for viewing by Licensee
         for the purpose of pre-order planning at the GTE area engineering
         offices during normal business hours, subject to reasonable advance
         notification. While a formal written request will not be required in
         connection with the first request by Licensee to view conduit maps, GTE
         reserves the right to refuse any subsequent viewing request or require
         written justification for the request if Licensee has demonstrated that
         it does not have a good faith intention to submit a COR. If the
         availability of specific point-to-point conduits can be determined at
         the time of viewing conduit maps, maps reflecting such point-to-point
         conduits may be made available for copying. Licensee shall pay to GTE a
         fee for making such copies available sufficient to cover the general
         administrative costs incurred. IN MAKING CONDUIT MAPS AVAILABLE, GTE
         WILL BE MAKING NO EXPRESS OR IMPLIED WARRANTY REGARDING THEIR ACCURACY
         OTHER THAN THAT THEY ARE THE SAME CONDUIT MAPS USED BY GTE IN ITS
         DAY-TO-DAY OPERATIONS.

8.       Availability of Information Regarding Space In Conduits.

         GTE will provide information regarding the availability of conduit
         space within thirty (30) Business Days of a written request by
         Licensee. Because GTE will endeavor to determine available space as
         quickly as possible, a shorter interval may be experienced for requests
         of a limited scope where physical field verification is not necessary.
         In the event the thirty (30) Business Day time frame cannot be met, GTE
         shall so advise Licensee and shall seek a mutually satisfactory
         alternative response date. No representation regarding the availability
         of space shall be made in the absence of a physical field verification.

9.       Authority to Place Licensee's Facilities.

         9.1       Before Licensee places any of Licensee's Facilities in GTE's
                   conduit(s) pursuant to an approved COR, Licensee, upon
                   request, shall submit sufficient evidence to GTE of its
                   authority to maintain the Facilities to be placed in GTE's
                   conduit(s) within the public streets, highways and other
                   thoroughfares or on private property. Licensee shall be 
                   solely responsible for obtaining all licenses, 
                   authorizations, permits and consents from federal, 

                                      L-3


<PAGE>   214
                  
                   state and municipal  authorities  or private  property 
                   owners that  may  be  required  to  place  and 
                   maintain   Licensee's Facilities in GTE's conduit(s).

         9.2       GTE shall not attempt to prevent or delay the granting of
                   any rights-of-way, easements, licenses, authorizations,
                   permits and consents from any federal, state or
                   municipal authorities, or private property owners that may
                   be required by Licensee to place Licensee's Facilities in
                   GTE's conduit(s).

         9.3       If any right-of-way, easement, license, authorization,
                   permit or consent obtained by Licensee is subsequently
                   revoked or denied for any reason, Licensee's permission to
                   occupy GTE's conduit(s) shall terminate immediately and
                   Licensee shall promptly remove Licensee's Facilities. Should
                   Licensee fail to remove Licensee's Facilities within thirty
                   (30) days of receiving notice to do so from GTE, GTE shall
                   have the option to remove Licensee's Facilities and store
                   them in a public warehouse or elsewhere at the expense of
                   and for the account of Licensee without GTE being deemed
                   guilty of trespass or conversion, and without GTE becoming
                   liable for any loss or damages to Licensee occasioned
                   thereby. All costs incurred by GTE to remove Licensee's
                   Facilities shall be reimbursed to GTE by Licensee upon
                   demand.

         9.4       Upon notice from GTE to Licensee that the cessation of the
                   use of any portion of GTE's conduit(s) has been ordered or   
                   directed by any federal, state or municipal authority, or
                   private property owner, Licensee's permission to occupy such
                   GTE conduit(s) shall terminate immediately and Licensee
                   promptly shall remove Licensee's Facilities. Should Licensee
                   fail to remove Licensee's Facilities within thirty (30) days
                   of receiving notice to do so from GTE, GTE shall have the
                   option to remove Licensee's Facilities and store them in a
                   public warehouse or elsewhere at the expense of and for the
                   account of Licensee without GTE being deemed guilty of
                   trespass or conversion, and without GTE becoming liable for
                   any loss or damages to Licensee occasioned thereby. All
                   costs incurred by GTE to remove Licensee's Facilities shall
                   be reimbursed to GTE by Licensee upon demand by GTE.

10.      Placement of Licensee's Facilities.

         10.1      Licensee shall, at its sole expense, place and maintain
                   Licensee's Facilities in GTE's conduit(s) in accordance with 
                   (I) such requirements and specifications as GTE shall from
                   time to time prescribe in writing, (ii) all rules or orders
                   now in effect or that hereafter may be issued by any
                   regulatory agency or other authority having jurisdiction,
                   and (iii) all currently applicable requirements and
                   specifications of the National Electrical Safety Code, and
                   the applicable rules and regulations of the Occupational
                   Safety And Health Act. Licensee agrees to comply, at its
                   sole risk and expense, with all specifications included in
                   Exhibits __ through __ hereto, as may be revised from time 
                   to time by GTE.

         10.2      Licensee's Facilities shall be tagged at each manhole so as
                   to identify Licensee as the owner of the Facilities. The tags
                   shall be of sufficient size and lettering so as to be easily
                   read.

11.      Failure of Licensee to Occupy Conduit Space.

         Upon approval of a COR, Licensee shall have sixty (60) days in which to
         begin the placement of Licensee's Facilities in the GTE conduit(s)
         covered by the COR. If Licensee has not begun placing its Facilities
         within that sixty (60) day period, Licensee shall so advise GTE with a
         written explanation for the delay. If Licensee fails to advise GTE of
         its delay, with a written explanation 

                                     L-4


<PAGE>   215


         therefor, or if Licensee fails to act in good faith by not making a
         bona fide effort to begin placing its Facilities within the sixty (60)
         days prescribed by this Section, the previously approved COR shall be
         deemed rescinded by GTE and Licensee shall have no further right to
         place Licensee's Facilities pursuant to that COR.
        
12.      Occupancy Fees.

         12.1      Licensee shall pay to GTE an Occupancy Fee, as specified in  
                   Exhibit ___ hereto, for each linear foot of innerduct
                   occupied by Licensee's Facilities in GTE's conduit(s). If
                   Licensee's Facilities occupy more than one innerduct, a
                   separate Occupancy Fee shall be paid by Licensee for each
                   innerduct occupied. The Occupancy Fee specified in Exhibit
                   ___ hereto is the fee applicable to 1" or 1-1/4" diameter
                   innerduct. GTE reserves the right to charge a higher fee for
                   innerduct of greater diameter. The Occupancy Fee may be
                   increased by GTE from time to time as permitted by law upon
                   sixty (60) days written notice to Licensee.

         12.2      Occupancy Fees shall become due and payable on the date a
                   COR is approved by GTE for all GTE innerducts identified in
                   that COR on a pro rata basis until the end of the calendar
                   year and thereafter on an annual basis within thirty (30)
                   days of the receipt of a statement from GTE specifying the
                   fees to be paid. Any payment after thirty (30) days shall
                   bear interest at the rate of eighteen percent (18%) per
                   annum or the maximum rate allowed by law, whichever is less.

         12.3      GTE shall maintain an inventory of the total linear footage
                   of innerduct occupied by Licensee's Facilities in GTE's      
                   conduit(s) based upon the cumulative linear footage per
                   innerduct from all CORs approved by GTE. GTE may, at its
                   option, conduct a physical inventory of Licensee's
                   Facilities for purposes of determining the Occupancy Fees to
                   be paid by Licensee under this section. It shall be
                   Licensee's sole responsibility to notify GTE of any and all
                   removals of Licensee's Facilities from GTE's conduit(s).
                   Written notice of such removals (unless they are covered by
                   Section 17 of this Agreement) shall be provided to GTE at
                   least thirty (30) days prior to the removal. Each Notice of
                   Removal shall be in a form specified by GTE. Licensee shall
                   remain liable for all Occupancy Fees until Licensee's
                   Facilities have been physically removed from GTE's conduits.

13.      Modifications, Additions or Replacements of Licensee's Facilities.

         13.1      Licensee shall not modify, add to or replace Licensee's
                   Facilities in any GTE conduit(s) without first notifying GTE 
                   in writing of the intended modification, addition or
                   replacement at least thirty (30) days prior to the date the
                   activity is scheduled to begin. The required notification
                   shall include: (1) the date the activity is scheduled to
                   begin, (2) a description of the planned modification,
                   addition or replacement, (3) a representation that the
                   modification, addition or replacement will not require any
                   space other than the space previously designated for
                   Licensee's Facilities, and (4) a representation that the
                   modification, addition or replacement will not impair the
                   structural integrity of the GTE conduit(s) involved.

         13.2      Should GTE determine that the modification, addition or      
                   replacement specified by Licensee in its notice will require
                   more space than that allocated to Licensee or will require
                   any modification, replacement or reinforcement of the GTE
                   conduit(s) involved in order to accommodate Licensee's
                   modification, addition or replacement, GTE will so notify
                   Licensee, whereupon Licensee shall be required to submit a
                   COR in compliance with this Agreement in order to obtain
                   authorization for the modification, addition or replacement
                   of Licensee's Facilities.


                                       L-5

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         13.3      Access to GTE's conduit(s) for repairs, modifications,
                   additions, or replacements required in emergency situations 
                   shall be governed by the provisions of Section 21 of this 
                   Agreement.

14.      Unauthorized Occupancy of GTE Conduit.

         14.1      It is agreed that a charge equal to five (5) times the
                   amount of the then current Occupancy Fee shall be paid by
                   Licensee to GTE for each unauthorized occupancy of GTE's
                   conduit(s) by Licensee. Such payment shall be deemed
                   liquidated damages and not a penalty. Licensee also shall
                   pay GTE an Occupancy Fee for each unauthorized occupancy
                   accruing from the date the unauthorized occupancy first
                   began. In the event that the date the unauthorized occupancy
                   first began cannot be determined, such date shall be deemed
                   the date of the last physical inventory made in accordance
                   with this Agreement or, if no physical inventory has been
                   conducted, the date the first COR from Licensee was approved
                   in accordance with this Agreement. Licensee also shall pay
                   to GTE all costs incurred by GTE to rearrange Licensee's
                   Facilities that are unauthorized if such rearrangement is
                   required to safeguard GTE's facilities or to accommodate the
                   facilities of another party whose facilities would not have
                   required a rearrangement but for the presence of Licensee's
                   unauthorized facilities. Licensee also shall pay to GTE all
                   costs incurred by GTE to reinforce, replace or modify any
                   GTE conduit(s), which reinforcement, replacement or
                   modification is required as a result of the unauthorized
                   occupancy by Licensee. The Occupancy Fee referenced in this
                   subsection 14.1 shall be determined in the same manner as
                   such a fee would have been determined if the occupancy had
                   been authorized by GTE.

         14.2      For purposes of this section, an unauthorized occupancy
                   shall include, but not be limited to:

                   14.2.1    The presence of Licensee's Facilities in any GTE 
                             conduit which conduit is not identified in any
                             COR approved in accordance with this Agreement;

                   14.2.2    The presence of Licensee's Facilities
                             in any GTE conduit that occupies more space
                             than that allocated to Licensee by GTE;

                   14.2.3    Licensee's Facilities that are not placed in
                             accordance with the provisions of this Agreement
                             or the appropriate COR issued pursuant to this
                             Agreement;

                   14.2.4    An addition or modification by Licensee to its
                             pre-existing Facilities in any GTE conduit that
                             impairs the structural integrity of that GTE
                             conduit.

                   14.2.5    The presence of facilities in GTE's conduit(s)
                             placed by Licensee that are owned or controlled
                             by and for the use of a party other than
                             Licensee.

15.      Modification or Alteration GTE Conduits.

         15.1      In the event GTE plans to modify or alter any GTE conduit(s)
                   that house Licensee's Facilities, GTE shall provide Licensee
                   notice of the proposed modification or alteration at least
                   fourteen (14) days prior to the time the proposed
                   modification or alteration is scheduled to take place.
                   Should Licensee decide to modify or alter Licensee's
                   Facilities in the GTE conduit(s) to be modified or altered
                   by GTE, Licensee shall so notify GTE in

                                      L-6


<PAGE>   217

                   writing. In such event, Licensee shall bear a        
                   proportionate share of the total costs incurred by GTE to
                   make the GTE conduit(s) accessible. Licensee's proportionate
                   share of the total cost shall be based on the ratio of the
                   amount of new space occupied by Licensee to the total amount
                   of new space occupied by all of the parties joining in the
                   modification.
 
         15.2      In the event GTE moves, replaces or changes the location,
                   alignment or grade of GTE's conduit(s) ("relocation") for
                   reasons beyond GTE's control, Licensee concurrently shall
                   relocate Licensee's Facilities. Licensee shall be solely
                   responsible for the costs of the relocation of Licensee's
                   Facilities.

16.      Disclaimer of Warranties.

         EXCEPT AS SPECIFICALLY SET FORTH IN THIS AGREEMENT, GTE MAKES NO
         WARRANTIES, EXPRESS OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, ANY
         IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR a PARTICULAR
         PURPOSE.

17.      Default and Remedies.

         17.1      The occurrence of any one of the following shall be deemed a
                   Material Default by Licensee under this Agreement:

                   17.1.1    Failure by Licensee to pay any fee or other sum 
                             required to be paid under the terms of this 
                             Agreement and such default continues for a
                             period of five (5) days after written notice 
                             thereof to Licensee;

                   17.1.2    Failure by Licensee to perform or observe any
                             other term, condition, covenant, obligation or
                             provision of this Agreement and such default
                             continues for a period of thirty (30) days after
                             written notice thereof from GTE (provided that if
                             such default is not curable within such thirty
                             (30) day period, the period will be extended if
                             Licensee commences to cure such default within
                             such thirty (30) day period and proceeds
                             diligently thereafter to effect such cure);
                             
                   17.1.3    The filing of any tax or mechanic's lien against
                             any GTE conduit(s) which is not bonded or
                             discharged within thirty (30) days of the date
                             Licensee receives notice that such lien has been
                             filed;
                             
                   17.1.4    Licensee's voluntary or involuntary bankruptcy;
                             
                   17.1.5    Licensee's knowing use or maintenance of 
                             Licensee's Facilities in violation of any
                             law or regulation, or in aid of any unlawful act 
                             or undertaking;
                             
                   17.1.6    If any authorization which may be required of the
                             Licensee by any governmental or private authority
                             for the placement, operation or maintenance of
                             Licensee's Facilities is denied or revoked.
                             
         17.2      In the event of a Material Default, GTE, without any further
                   notice to the Licensee (except where expressly provided for
                   below or required by applicable law) may do any one or more
                   of the following: 


                   17.2.1    Perform, on behalf and at the expense of
                             Licensee, any obligation of Licensee
                             under this Agreement which Licensee has failed to
                             perform and of which GTE shall have given
                             Licensee notice, the cost of which performance
                             shall be paid by Licensee to GTE upon demand;

                                     L-7
<PAGE>   218

                   17.2.2    Terminate this Agreement by giving notice of such
                             termination to Licensee and remove Licensee's
                             Facilities and store them in a public warehouse
                             or elsewhere at the expense of and for the
                             account of Licensee without GTE being deemed
                             guilty of trespass or conversion, and without GTE
                             becoming liable for any loss or damages to
                             Licensee occasioned thereby; or
                             
                   17.2.3    Exercise any other legal or equitable right or
                             remedy which GTE may have.
                             
         17.3      Any costs and expenses incurred by GTE (including, without
                   limitation, reasonable attorneys' fees) in enforcing this
                   Agreement shall be paid to GTE by Licensee upon demand.

         17.4      Upon termination of this Agreement by GTE, Licensee shall 
                   remain liable to GTE for any and all fees, other payments
                   and damages which may be due or sustained prior to such      
                   termination, all reasonable costs, fees and expenses,
                   including, without limitation, reasonable attorneys' fees
                   incurred  by GTE in pursuit of its remedies hereunder, and
                   additional liquidated damages which shall be an amount
                   equal to one full year of Occupancy Fees.

         17.5      All rights and remedies of GTE set forth in this Agreement
                   shall be cumulative and none shall exclude any other right or
                   remedy, now or hereafter allowed by or available under any
                   statute, ordinance, rule of court, or the common law, either
                   at law or in equity, or both.

18.      Indemnification.

         18.1      Licensee shall compensate GTE for the full actual loss,
                   damage or destruction of GTE's property that in any way
                   arises from  or is related to this Agreement or activities
                   undertaken pursuant to this Agreement (including, without
                   limitation, the installation, construction, operation or
                   maintenance of Licensee's Facilities).

         18.2      Licensee will further indemnify, defend and hold harmless
                   GTE and GTE's agents, officers, employees and assigns, from
                   any  and all losses, damages, costs, expenses (including,
                   without limitation, reasonable attorneys' fees), statutory
                   fines or penalties, actions or claims for personal injury
                   (including death), damage to property, or other damage or
                   financial loss of whatever nature in any way arising out of
                   or connected with this Agreement or activities undertaken
                   pursuant to this Agreement (including, without limitation,
                   the installation, construction, operation or maintenance of
                   Licensee's Facilities), except to the extent caused by the
                   negligence or willful misconduct on the part of GTE or GTE's
                   agents, officers, employees and assigns. Licensee further
                   indemnifies GTE from subsequent taxes and fees that may be
                   levied by municipalities ROWs in association with these
                   agreements. Such fees that are levied would be in addition
                   to the attachment/occupancy fees reflected in this
                   Agreement. Licensee expressly assumes all liability for
                   actions brought against GTE and GTE's agents, officers,
                   employees and assigns, by Licensee's agents, officers or
                   employees and Licensee expressly waives any immunity from
                   the enforcement of this indemnification provision that might
                   otherwise be provided by workers' compensation law or by
                   other state or federal laws.

         18.3      Without limiting any of the foregoing, Licensee assumes all
                   risk of, and agrees to relieve GTE of any and all liability  
                   for, loss or damage (and the consequences of loss or damage)
                   to any of Licensee's Facilities placed in any GTE conduit(s)
                   and any other financial loss sustained by Licensee, whether
                   caused by fire, extended coverage perils, or other casualty,

                                      L-8
<PAGE>   219

                   except to the extent caused by the negligence or willful
                   misconduct on the part of GTE or GTE's agents, officers,
                   employees and assigns.

         18.4      Without limiting the foregoing, Licensee expressly agrees to
                   indemnify, defend and hold harmless GTE and GTE's agents,    
                   officers, employees and assigns from any and all claims
                   asserted by customers of Licensee in any way arising out of
                   or in connection with this Agreement or Licensee's
                   Attachments, except to the extent caused by the negligence
                   or willful misconduct on the part of GTE or GTE's agents,
                   officers, employees and assigns.

         18.5      Notwithstanding anything to the contrary in this Agreement,
                   Licensee further shall indemnify and hold harmless GTE, its  
                   agents, officers, employees and assigns from and against any
                   claims, liabilities, losses, damages, fines, penalties and
                   costs (including, without limitation, reasonable attorneys'
                   fees) whether foreseen or unforeseen, which the indemnified
                   parties suffer or incur because of: (I) any discharge of
                   Hazardous Waste resulting from acts or omissions of Licensee
                   or the Licensee's predecessor in interest; (ii) acts or
                   omissions of the Licensee, its agents, employees,
                   contractors or representatives in connector with any cleanup
                   required by law, or (iii) failure of Licensee to comply with
                   Environmental, Safety and Health Laws.

         18.6      In no event shall GTE be liable to Licensee for any special,
                   consequential or indirect damages (including, without        
                   limitation, lost revenues and lost profits) arising out this
                   Agreement or any obligation arising hereunder, whether in an
                   action for or arising out of breach of contract, tort or
                   otherwise.

         18.7      Licensee shall indemnify, protect and hold harmless GTE from
                   and against any and all claims for libel and slander,
                   copyright and/or patent infringement arising directly or
                   indirectly by reason of installation of Licensee's equipment
                   in GTE's Ducts pursuant to this Agreement.

19.      Insurance.

         19.1      Licensee shall carry insurance, at its sole cost and
                   expense, sufficient to cover its indemnification obligations
                   as set forth in Section 18 of this Agreement. Such
                   insurance shall include, but not be limited to, coverage
                   against liability due to personal injury or death of persons
                   in the amount of $500,000 as to any one person and
                   $1,000,000 as to any one accident; coverage against
                   liability due to property damage in the amount of $500,000
                   as to each accident and $500,000 aggregate; and coverage
                   necessary to fully protect both it and GTE from all claims
                   under any worker's compensation laws that may be applicable.

         19.2      All insurance required of Licensee under this Agreement
                   shall remain in force for the entire life of this Agreement.
                   The  company or companies issuing such insurance shall be
                   approved by GTE and GTE shall be named as an additional
                   insured in each such policy. Licensee shall submit to GTE
                   certificates by each insurer to the effect that the insurer
                   has insured Licensee for all potential liabilities of
                   Licensee under this Agreement, and that it will not cancel
                   or change any policy of insurance issued to Licensee except
                   upon thirty (30) days notice to GTE. In the event Licensee's
                   insurance coverage is to be canceled by reason of
                   non-payment of premiums due, GTE shall have the option of
                   paying any amount due and Licensee shall forthwith reimburse
                   GTE the full amount paid by GTE.

         19.3      Licensee shall promptly advise GTE in writing of any and all
                   claims for damages, including, but not limited to, damage to 
                   property or injury to or death of persons, allegedly arising
                   out of or in any manner related, directly or indirectly, to
                   the presence or use of Licensee's Facilities.

                                      L-9
<PAGE>   220
         19.4      Licensee shall furnish bond or satisfactory evidence of
                   contractual insurance coverage, the terms of which shall be
                   subject to GTE's approval, in the amount of ten thousand
                   dollars ($10,000) to guarantee the payment of any sums which
                   may become due to GTE for rentals, inspections or for work
                   performed by GTE for the benefit of Licensee under this
                   Agreement, including the removal of Licensee's equipment
                   pursuant to any of the provisions hereof. All bonds must
                   specify that the GTE be notified thirty (30) days prior to
                   the expiration or cancellation of the policy.

20.      Taxes.

         Any state or local excise, sales, or use taxes (excluding any taxes
         levied on income) resulting from the performance of this Agreement
         shall be borne by the Party upon which the obligation for payment is
         imposed under applicable law, even if the obligation to collect and
         remit such taxes is placed upon the other Party. The collecting Party
         shall charge and collect from the obligated Party, and the obligated
         Party agrees to pay to the collecting Party, all applicable taxes,
         except to the extent that the obligated Party notifies the collecting
         Party and provides to the collecting Party appropriate documentation as
         GTE requires that qualifies the obligated Party for a full or partial
         exemption. Any such taxes shall be shown as separate items on
         applicable billing documents between the Parties. The obligated Party
         may contest the same in good faith, at its own expense, and shall be
         entitled to the benefit of any refund or recovery, provided that such
         Party shall not permit any lien to exist on any asset of the other
         Party by reason of the contest. The collecting Party shall cooperate in
         any such contest by the other Party. The other Party will indemnify the
         collecting Party from any sales or use taxes that may be subsequently
         levied on payments by the other Party by the collecting Party.

21.      Emergency Restoration Procedures.

         In the event of an emergency, restoration procedures may be affected by
         the presence of Licensee's Facilities in GTE's conduit(s). While GTE
         shall not be responsible for the repair of Licensee's Facilities that
         are damaged (except by mutual written agreement), GTE shall nonetheless
         control access to its Conduits if the restoration is to be achieved in
         an orderly fashion.


         21.1      Where GTE and Licensee are involved in emergency
                   restorations,  access to GTE's conduit(s) will be controlled
                   by GTE's  Maintenance District Manager or his/her on-site 
                   representative according to the following guidelines:

                   21.1.1    Service Disruptions/Outages

                        (a)  In the event of service disruptions and/or
                             outages, while exercising its right to first
                             access, GTE shall make all reasonable efforts to
                             grant access to as many other entities with
                             facilities in GTE's conduit(s) as is reasonably
                             safe.

                        (b)  Where simultaneous access is not possible, access
                             will be granted by GTE on a first come, first
                             served basis.

                   21.1.2    Service Affecting Emergencies

                        (a)  In the event of service affecting emergencies
                             not resulting in service disruptions or outages,
                             while exercising its right to first access, GTE
                             shall make all reasonable efforts to grant access
                             to as many other entities with facilities in GTE's
                             conduit(s) as is reasonably safe.

                                    L-10
<PAGE>   221

                        (b)  Where GTE is unable to grant simultaneous
                             access to all other entities with facilities in
                             GTE's conduit(s), access will granted according to
                             the level of damage to the facilities of each
                             entity and the likelihood that a given level of
                             damage will result in service disruption. Where
                             the likelihood that a service disruption will
                             result is not clearly discernible, access will be
                             on a first come, first served basis.

         21.2      Without limiting any other indemnification or hold
                   harmless provisions of this Agreement, Licensee agrees that
                   any decision by GTE regarding access to Licensee's
                   Facilities, or any action or failure to act by GTE under
                   this Section 21 shall not constitute a basis for any claim
                   by Licensee against GTE for any damage to Licensee's
                   Facilities or disruption of Licensee's services, or any
                   other direct or indirect damages of any kind whatsoever
                   incurred by Licensee.

22.      Damage Suspected to Licensee's Facilities Only.

         22.1      In the event Licensee receives information that
                   Licensee's Facilities are damaged, Licensee shall notify GTE
                   of said damage at [---TELEPHONE NUMBER---]. This is a
                   24-hour, 7 days per week notification number. Licensee shall
                   provide GTE all information known to it regarding the damage
                   to Licensee's Facilities.

         22.2      In the event GTE receives notice that Licensee's
                   Facilities are damaged, GTE will notify Licensee of said
                   damage by telephone at the Licensee's emergency telephone
                   number. GTE shall provide Licensee all information known to
                   it regarding the damage to Licensee's Facilities.

         22.3      After the giving of such notice by either Licensee or
                   GTE, Licensee shall be authorized to perform emergency
                   restoration maintenance activities in connection with
                   Licensee's Facilities, subject to the provisions of this
                   Agreement.

         22.4      Without limiting any other indemnification or hold
                   harmless provisions of this Agreement, Licensee agrees that
                   any decision by GTE regarding access to Licensee's
                   facilities, or any action or failure to act by GTE,
                   appropriately or inappropriately, under this Section shall
                   not be the basis for any claim by Licensee against GTE for
                   any damage to Licensee's Facilities or disruption of
                   Licensee's services, or any other direct or indirect damages
                   of any kind whatsoever incurred by Licensee and Licensee
                   shall indemnify and hold GTE harmless from any such claim.

23.      Access to GTE's Manholes/Handholes.

         23.1      GTE will allow Licensee to audit manholes/handholes
                   that are included in any COR submitted to GTE to confirm
                   usability. Licensee shall give GTE at least fourteen (14)
                   days advance written notice of its desire to audit and shall
                   obtain all authorizations from appropriate authorities
                   required to open the manholes/handholes. GTE shall have the
                   right to have a GTE employee or agent present when its
                   manholes/handholes are being opened. Such GTE employee or
                   agent shall have the authority to suspend Licensee's
                   activities in and around GTE's manholes/handholes if, in the
                   sole discretion of said employee or agent, any hazardous
                   conditions arise or any unsafe practices are being followed
                   by Licensee's employees, agents, or contractors. Licensee
                   agrees to reimburse GTE the cost of having GTE's employee or
                   agent present. Such charge shall be GTE's fully loaded labor
                   rates then in effect.


                                    L-11
<PAGE>   222

         23.2      For purposes other than to audit usability, GTE's
                   manholes/handholes shall be opened only as permitted by GTE
                   and only after Licensee has obtained all necessary
                   authorizations from appropriate authorities to open
                   manholes/handholes and conduct work operations therein. GTE
                   shall have the right to have a GTE employee or agent present
                   at any site at which its manholes/handholes are being
                   opened. Such GTE employee or agent shall have the authority
                   to suspend Licensee's work operations in and around GTE's
                   manholes/handholes if, in the sole discretion of said
                   employee or agent, any hazardous conditions arise or any
                   unsafe practices are being followed by Licensee's employees, 
                   agents, or contractors. Licensee agrees to reimburse GTE the 
                   cost of having GTE's employee or agent present. Such charge 
                   shall be GTE's fully loaded labor rates then in effect. The 
                   presence of GTE's authorized employee or agent shall not 
                   relieve Licensee of its responsibility to conduct all of 
                   its work operations in and around GTE's conduit(s) in a 
                   safe and workmanlike manner, in accordance with the terms of 
                   this Agreement.

24.      Abandonment.

         Nothing in this Agreement shall prevent or be construed to prevent GTE
         from abandoning, selling, assigning or otherwise disposing of any GTE
         conduit(s) or other GTE property used in connection with Licensee's
         Facilities; provided, however, that GTE shall condition any such sale,
         assignment or other disposition subject to the rights granted to
         Licensee pursuant to this Agreement. GTE shall promptly notify Licensee
         of any proposed sale, assignment or other disposition of any GTE
         conduit(s) or other GTE property used in connection with Licensee's
         Facilities.

25.      Notices.

         Any written notice to be given to a party to this Agreement shall be in
         writing and given or made by means of telegram, facsimile transmission,
         certified or registered mail, express mail or other overnight delivery
         service, or hand delivery, proper postage or other charges prepaid, and
         addressed or directed to the respective parties as follows:

              To Licensee:      ______________________________
                                ______________________________
                                ______________________________

              To GTE:           ______________________________
                                ______________________________
                                ______________________________
                                        
         Any notice given by personal delivery shall be deemed to have been
         given on the day of actual delivery and, if given by registered or
         certified mail, return receipt requested, on the date of receipt
         thereof and, if given by facsimile transmission, on the day of
         transmittal thereof if given during the normal business hours of the
         recipient and on the next business day if not given during normal
         business hours.

26.      Non-Waiver of Terms and Conditions.

         No course of dealing, course of performance or failure to enforce any
         of term, right, condition or other provision of this Agreement shall
         constitute or be construed as a waiver of any term, right or condition
         or other provision of this Agreement.


                                    L-12
<PAGE>   223

27.      Dispute Resolution.

         27.1      Except in the case of (i) a suit, action or proceeding
                   by GTE to compel Licensee to comply with its obligations to
                   indemnify GTE pursuant to this Agreement or (ii) a suit,
                   action or proceeding to compel either party to comply with
                   the dispute resolution procedures set forth in this section,
                   the parties agree to use the following procedure to resolve
                   any dispute, controversy or claim arising out of or relating
                   to this Agreement or its breach.

         27.2      At the written request of a party, each party shall
                   designate a knowledgeable, responsible representative to
                   meet and negotiate in good faith to resolve any dispute,
                   controversy or claim arising under this Agreement. The
                   parties intend that these negotiations be conducted by
                   non-lawyer, business representatives. The substance of the
                   negotiations shall be left to the discretion of the
                   representatives. Upon mutual agreement, the representatives
                   may utilize other alternative dispute resolution procedures
                   such as mediation to assist in the negotiations. Discussions
                   and correspondence between the representatives for purposes
                   of these negotiations shall be treated as confidential,
                   undertaken for purposes of settlement, shall be exempt from
                   discovery and production, and shall not be admissible in the
                   arbitration described below or in any subsequent lawsuit
                   without the concurrence of all parties. Documents identified
                   in or provided during such negotiations, which are not
                   prepared for purposes of the negotiations, shall not be so
                   exempt and may, if otherwise admissible, be admitted as
                   evidence in any subsequent proceeding.

         27.3      If a resolution of the dispute, controversy or claim is
                   not reached within sixty (60) days of the initial written
                   request, the dispute, controversy or claim shall be
                   submitted to binding arbitration by a single arbitrator
                   pursuant to the rules of the American Arbitration
                   Association (AAA), except as hereinafter provided. Discovery
                   in any proceeding before the AAA shall be controlled by the
                   arbitrator and shall be permitted to the extent set forth in
                   this section. Parties may exchange, in any combination, up
                   to thirty-five (35) (none of which may contain subparts)
                   written interrogatories, demands to produce documents and
                   requests for admission. Each party may also to take the oral
                   deposition of one (1) witness. Additional discovery may be
                   permitted upon mutual agreement of the parties. The
                   arbitration hearing shall be commenced within sixty (60)
                   days of the demand for arbitration and shall be held in the
                   city where GTE's local offices are located. The arbitrator
                   shall rule on the dispute, controversy or claim by issuing a
                   written opinion within thirty (30) days after the close of
                   hearings. The times specified in this section may be
                   extended upon mutual agreement of the parties or by the
                   arbitrator upon a showing of good cause. Judgment upon the
                   award rendered by the arbitrator may be entered in any court
                   having jurisdiction.

         27.4      Each party shall bear its own costs, including
                   attorneys' fees, incurred in connection with any of the
                   foregoing procedures. A party seeking discovery shall
                   reimburse the responding party the cost of reproducing
                   documents (to include search time and reproduction time
                   costs). The fees associated with any arbitration, including
                   the fees of the arbitrator, shall be divided equally between
                   the parties.

28.      Compliance With Laws.

         Notwithstanding anything to the contrary in this Agreement, Licensee
         shall ensure that any and all activities it undertakes pursuant to this
         Agreement shall comply with all applicable laws, including, without
         limitation, all applicable provisions of (I) workers' compensation
         laws, (ii) unemployment compensation laws, (iii) the Federal Social
         Security Law, (iv) the Fair Labor Standards Act, and (v) all laws,
         regulations, rules, guidelines, policies, orders, permits and 


    
                                    L-13

<PAGE>   224
         approvals of any governmental authority relating to environmental 
         matters and/or occupational safety.

29.      Force Majeure.

         Except for payment of the Occupancy Fees and other amounts payable
         under this Agreement, neither party shall have any liability for its
         delays or its failure in performance due to fire, flood, explosion,
         pest damage, power failures, strikes or labor disputes, acts of God,
         the Elements, war, civil disturbances, acts of civil or military
         authorities or the public enemy, inability to secure raw materials,
         transportation facilities, fuel or energy shortages, or other cause
         beyond its control.

30.      Assignment.

         30.1      The rights and obligations of Licensee under this
                   Agreement shall not be assigned, transferred or
                   sub-licensed, in whole or in part, without the prior written
                   consent of GTE. An assignment, transfer or sub-license of
                   this Agreement by Licensee shall not relieve Licensee of its
                   obligations under this Agreement. Any assignment attempted
                   without the prior written consent of GTE shall be void.

         30.2      GTE shall have the right to assign this Agreement and
                   to assign its rights and delegate its obligations and
                   liabilities under this Agreement, either in whole or in
                   part. GTE shall provide notice to Licensee of any assignment
                   which shall state the effective date thereof. Upon the
                   effective date and to the extent of the assignment, GTE
                   shall be released and discharged from all obligations and
                   liabilities under this Agreement.

         30.3      Neither this Agreement nor any term or provision
                   hereof, nor any inclusion by reference shall be construed as
                   being for the benefit of any person or entity not a
                   signatory hereto.

         30.4      This Agreement shall be binding upon and inure to the benefit
                   of the parties hereto and their respective successors and
                   assigns.

31.      Applicable Law.

         This Agreement, and the rights and obligations contained in it, shall
         be governed and construed under the laws of the State of ____________
         without regard to its conflicts of laws provisions.

32.      Subsequent Law.

         The terms and conditions of this Agreement shall be subject to any and
         all applicable laws, rules, regulations or guidelines that subsequently
         may be prescribed by any federal, state or local governmental
         authority. To the extent required by any such subsequently prescribed
         law, rule, regulation or guideline, the parties agree to modify, in
         writing, the affected term(s) and condition(s) of this Agreement to
         bring them into compliance with such law, rule, regulation or
         guideline. Should any term of this Agreement be determined by a court
         or other entity with competent jurisdiction to be unenforceable, all
         other terms of this Agreement shall remain in full force and effect.

33.      Headings.

         All headings contained in this Agreement are for convenience only and
         are not intended to affect the meaning or interpretation of any part of
         this Agreement.

                                    L-14


<PAGE>   225

34.      Entire Agreement.

         The terms and conditions of this Agreement supersede all prior oral or
         written understandings between the parties and constitute the entire
         agreement between them concerning the subject matter of this Agreement.
         There are no understandings or representations, express or implied, not
         expressly set forth in this Agreement. This Agreement shall not be
         modified or amended except by a writing signed by the party to be
         charged.

IN WITNESS WHEREOF, the parties hereto have executed this Agreement through 
their authorized representatives.

For GTE:                                              For Licensee:

GTE

_______________________________                       _________________________
(Signature of Authorized Agent)                       (Signature of Officer)
(Printed Name of Authorized Agent)                    (Printed Name of Officer)
(Title)                                               (Title)
(Date)                                                (Date)


                                                       ATTEST:

                                                       Corporate Seal (If 
                                                       Applicable)

                                    L-15
<PAGE>   226


                                EXHIBIT______

                               OCCUPANCY FEES







                                    L-16
<PAGE>   227



                                   APPENDIX M
                  RECIPROCAL COMPENSATION FOR CALL TERMINATION

1.       This document describes the reciprocal compensation arrangements
         between DTI and GTE for Local Tariff, Toll and Switched Access
         Services. The Parties shall compensate each other for transport and
         termination of such traffic at the rates provided in Appendix D and/or
         the appropriate Parties' Switched Access Tariff.

2.       Compensation for Call Termination

         A.   Reciprocal compensation does not apply in a resale 
              environment.

         B.   The following compensation terms shall apply in all cases
              where DTI purchases GTE's unbundled Local Switching:

              1.   For local intra-switch calls between lines connected to
                   GTE's switch where DTI has purchased GTE's unbundled Local 
                   Switching, the Parties agree to impose no call termination 
                   charges on each other. GTE's Local Switching charge will
                   apply as described below where the call is: 

                   (a)  Originated by DTI's customer and completed to a
                        GTE customer:

                        (1)  (For use of the local switch): Local Switching
                             charge at the originating office will apply to
                             DTI.

                   (b)  Originated by DTI's customer and completed to
                        the customer of a Third Party LEC (not affiliated with
                        DTI) using GTE's unbundled Local Switching:

                        (1)  (For use of the local switch): Local Switching
                             charge at the originating office will apply to
                             DTI.

                   (c)  Originated by DTI's customer and completed to another 
                        DTI's customer using GTE's unbundled Local Switching.

                        (1)  (For use of the local switch):  Local Switching
                             charge at the originating office will apply to 
                             DTI.

                   (d)  Originated by a GTE customer and terminated to
                        DTI's customer using GTE's unbundled Local Switching. 

                        (1) No Local Switching charge will apply.

                   (e)  Originated by the customer of a Third Party LEC
                        (not affiliated with DTI) using GTE's unbundled Local
                        Switching and terminated to DTI's customers using GTE's
                        unbundled Local Switching. 

                        (1) No Local Switching charge will apply to DTI.

         2.   For Local inter-switch calls where DTI has purchased GTE's 
              unbundled Local Switching. 

              GTEs charges will apply to DTI described below where the call is:
        


                                     M-1

<PAGE>   228

              (a)  Originated from DTI's end-user customer using GTE's
                   unbundled Local Switching and completed to a GTE customer.
        

                   (1)  (For use of the local switch): Local Switching charge 
                        at the originating office.

                   (2)  a mileage-based transport charge will apply when DTI 
                        uses GTE's transport.

                   (3)  (For call termination): Charges for local 
                        interconnection/call termination, when applicable.

              (b)  Originated from DTI's customer using GTE's unbundled
                   Local Switching and completed to a Third Party LEC (not
                   affiliated with DTI) customer using GTE's unbundled Local
                   Switching. 

                   (1)  (For use of the local switch): Local Switching
                        charge at the originating office.

                   (2)  a mileage-based transport charge will apply
                        when DTI uses GTE's transport.

              (c)  Originated from DTI's customer using GTE's unbundled
                   Local Switching and completed to the interconnected network
                   of a Third Party LEC (not affiliated with DTI).

                   (1)  (For use of the local switch): Local Switching
                        charge at the originating office.

                   (2)  a mileage-based transport charge will apply
                        when DTI uses GTE's transport, and mileage shall be
                        measured between the originating office and the POI of
                        the Third Party's network.

              (d)  Originated from DTI's customer using GTE's unbundled
                   Local Switching and completed to DTI's customer using GTE's
                   unbundled Local Switching.

                   (1)  (For use of the local switch):  Local Switching
                        charge at the originating office.

                   (2)  a mileage-based transport charge will apply
                        when DTI uses GTE's transport.

                   (3)  (For use of the local switch): Local Switching
                        charge at the terminating office.

              (d)  Originated by a GTE customer and terminated to DTI's
                   customer using GTE's unbundled Local Switching.

                   (1)  (For use at local switch): Local Switching Charge at 
                        the terminating office.


                                     M-2


<PAGE>   229

                   (2)  (For call termination): DTI shall charge GTE
                        for local interconnection/call termination, when
                        applicable.
                           
              (f)  Originated by a customer of a third-party LEC (not
                   affiliated with DTI) using GTE's unbundled Local Switching
                   and terminated to DTI's customer using GTE's unbundled Local
                   Switching.

                   (1)  (For use of the local switch): Local Switching
                        charge at the terminating  office.

              (g)  Originated by a customer of the  interconnected network
                   of a third-party LEC (not affiliated with DTI) and
                   terminated to DTI's customer using GTE's unbundled Local
                   Switching.

                   (1)  (For use of the local switch):  Local Switching
                        charge at the  terminating office.

3.       For intraLATA toll calls where DTI has purchased GTE's unbundled Local
         Switching, charges per Unbundled Network Element pricing shall apply as
         follows: 

         A.   Originated by DTI's customer and completed to a GTE customer.

              1.   (For use of the local switch): Local Switching charge
                   plus RIC and CCLC (Residual Interconnection Charge)
                   at the originating office.

              2.   Shared transport charge between the two offices will apply 
                   when DTI uses GTE's transport.

              3.   (For call termination): End Office Switching charge
                   at the terminating office (Switched Access Rate).

              4.   RIC and CCLC at the terminating office.

         B.   Originated by DTI's customer and completed to the customer of a
              third-party LEC (not affiliated with DTI) using GTE's  unbundled
              Local Switching in a distant end office.

              1.   (For use of the local switch): Local Switching charge
                   plus RIC and CCLC at the originating office.

              2.   Shared transport charge between the two offices will
                   apply when DTI uses GTE's transport.

         C.   Originated by DTI customer and completed to the network of a
              third-party LEC (not affiliated with DTI) interconnected with
              GTE's network.

              1.   (For use of the local switch): Local Switching charge, plus
                   RIC and CCLC, at the originating office.

              2.   Common transport charge will apply when DTI uses GTE's
                   transport, and mileage shall be measured between the
                   originating office and the POI of the Third Party's network.

              3.   Tandem Switching, where applicable.


                                     M-3

<PAGE>   230

         D.   Originated by DTI's customer and completed by another of DTI's
              customers being served through GTE's unbundled Local Switching in
              a distant office. 

              1.   (For use of the local switch): Local Switching  charge
                   plus RIC and CCLC at the originating office.

              2.   Shared transport charge between the two offices will
                   apply when DTI uses GTE's transport.

              3.   (For use of the local switch): Local Switching charge
                   plus RIC and CCLC at the terminating office.

         E.   Originated by a GTE customer and terminated to DTI's customer
              using GTE's unbundled Local Switching.

              1.   (For use of the local switch): Local Switching  charge
                   plus RIC and CCLC at the terminating office.

              2.   (For call termination): DTI will charge GTE Local
                   Switching at the terminating office (Switched  Access Rate).

              3.   (For call termination): DTI will charge GTE NIC and 
                   CCLC at the terminating office.

         F.   Originated by the customer of a third-party LEC (not 
              affiliated with DTI) using GTE's unbundled  Local Switching  in a
              distant end office and terminated to DTI's customer using GTE's
              unbundled Local Switching.

              1.   (For use of the local switch): Local Switching charge
                   plus RIC and CCLC at the terminating office.


         G.   Originated by a customer of the network of a third-party LEC
              (not affiliated with DTI) interconnected with GTE's network and
              terminated to DTI's customer using GTE's unbundled Local
              Switching. 

              1. (For use of the local switch): Local Switching charge plus 
                 RIC and CCLC at the terminating office.

4.       For intrastate Switched Access calls where DTI's is using GTE's
         unbundled Local Switching for calls originated from or terminated to an
         IXC for completion:


         a.   For calls originated from DTI's customer to DTI's own IXC switch 
              (or that of an affiliate) for completion.

              1.   (For use of the local switch): Local Switching charge 
                   at the terminating office.

              2.   Originating RIC and CCLC.

              3.   GTE will charge DTI's IXC affiliate the following 
                   Switched Access elements on a meet-point basis:

                   (a)  Local Transport;

                   (b)  Tandem Switching.

                                     M-4
<PAGE>   231

              4.   DTI will charge DTI's IXC affiliate the following
                   Switched Access elements on a meet-point basis:

                   (a)  Originating RIC and CCLC;

                   (b)  Local Switching.

         B.   For calls originating from DTI's customer to an IXC's switch 
              not affiliated with DTI.

              1.   (For use of the local switch):  DTI's customer to an 
                   IXC's switch not affiliated with DTI. 

              2.   Originating RIC and CCLC.

              3.   GTE shall charge the non-affiliated IXC for the 
                   following originating Switched Access on a meet-point basis:

                   (a)  Local Transport;

                   (b)  Tandem Switching.

              4.   DTI will charge the non-affiliated IXC for the following 
                   Switched Access elements on a meet-point
                           basis:

                   (a)  Originating RIC and CCLC;

                   (b)  Local Switching.

         C.   For calls terminating to DTI's end-user customer from DTI's
              own IXC switch (or that of an affiliate) for completion. 

              1.   (For use of the local switch): Local Switching charge
                   at the terminating office.

              2.   Terminating RIC and CCLC.

              3.   GTE will charge DTI's IXC (affiliate) the following 
                   Switched Access elements on a meet-point basis:

                   (a)  Local Transport;

                   (b)  Tandem Switching.

              4.   DTI will charge DTI's IXC (affiliate) for the following
                   Switched Access elements on a meet-point basis:

                   (a)  Terminating RIC and CCLC.

                   (b)  Local Switching.

         D.   For calls terminating to DTI's customer from an IXC switch not
              affiliated with DTI. 

              1.   (For use of the local switch): Local Switching charge at 
                   the terminating office.

                                     M-5
<PAGE>   232

              2.   Terminating RIC and CCLC.

              3.   GTE shall charge the IXC for the following terminating
                   Switched Access on a meet-point basis:

                   (a)  Local Transport;

                   (b)  Tandem Switching.

              4.   DTI will charge IXC for the following Switched Access
                   elements on a meet-point basis:

                   (a)  Terminating RIC and CCLC;

                   (b)  Local Switching.

5.       For interstate Switched Access calls where DTI is using GTE's unbundled
         Local Switching for calls originated from or terminated to an IXC for
         completion:

         a.   For calls originated from DTI's customer to DTI's own IXC switch 
              (or that of an affiliate) for completion.

              1.   (For use of the local switch): Local Switching charge
                   at the originating office.

              2.   Originating Residual Interconnection Charge (RIC) and
                   CCL.

              3.   GTE shall charge DTI's IXC affiliate for the following
                   originating Switched Access on a meet-point basis:

                   (a)  Local Transport;

                   (b)  Tandem Switching.

              4.   DTI will charge DTI's IXC affiliate the following Switched 
                   Access elements on a meet-point basis:

                   (a)  Originating RIC;

                   (b)  Originating CCLC;

                   (c)  Local Switching.

         B.   For calls originated from DTI's customer to an IXC's switch 
              not affiliated to DTI.
                   
              1.   (For use of the local switch): Local Switching charge at 
                   the terminating office.

              2.   Originating RIC and CCLC.

              3.   GTE shall charge the IXC for the following originating 
                   Switched Access on a meet-point basis:

                   (a)  Local Transport;


                                     M-6


<PAGE>   233
                   (b)  Tandem Switching.

              4.   DTI will charge IXC the following Switched Access elements 
                   on a meet-point basis:

                   (a)  Originating RIC;

                   (b)  Originating CCLC;

                   (c)  Local Switching.

         C.   For calls terminating to DTI's customer for DTI's own IXC
              switch (or that of an affiliate) for completion. 

              1.   (For use of the local switch): Local Switching charge at 
                   the terminating office.

              2.   Terminating RIC and CCL.

              3.   GTE will charge DTI's IXC (affiliate) the following
                   Switched Access elements on a meet-point basis:

                   (a)  Local Transport;

                   (b)  Tandem Switching.

              4.   DTI will charge DTI's IXC affiliate the following 
                   Switched Access elements on a meet-point basis:

                   (a)  Terminating RIC;

                   (b)  Terminating CCLC;

                   (c)  Local Switching.

         D.   For calls terminating to DTI's customer from an IXC
              switch not affiliated with DTI. 

              1.   (For use of the local switch): Local Switching charge 
                   at the terminating office.

              2.   Terminating RIC and CCL.

              3.   GTE will charge the non-affiliated IXC for the 
                   following terminating Switched Access on a meet-
                   point basis:

                   (a)  Local Transport;

                   (b)      Tandem Switching.

              4.   DTI will charge IXC the following Switched Access
                   elements on a meet-point basis:

                   (a)  Terminating RIC;

                   (b)  Terminating CCLC;

                   (c)  Local Switching.


                                     M-7

<PAGE>   234

                                  APPENDIX 46A
                                   MCIm TERMS
                        GTE/DTI OPT-IN NEGOTIATION ISSUES


Pursuant to Section 46 of Article III of this Agreement and subject to all of
the terms and conditions thereof, and after notice as called for in Section 46,
the following MCIm TERMS referred to in Section 46 will be substituted for the
GTE TERMS which are set out in Appendix 46B as and when Section 46 calls for
them to be substituted. When the MCIm Agreement is selected pursuant to the
provisions of Section 46, the parties shall modify this Appendix by replacing
the descriptions of issues below with the specific rates and terms and
conditions of the selected MCIm Agreement that describes those precise issues
are attached hereto as Exhibits to this Appendix. 

ARTICLE V, SECTION 1 

1.       Telecommunications Services Provided for Resale.

         1.1  At the request of MCIm, and pursuant to the requirements of the
              Act, and FCC Rules and Regulations, GTE shall make available to
              MCIm for unrestricted resale, all Telecommunications Services
              that GTE currently provides or may offer hereafter at retail to
              subscribers who are not Telecommunications Carriers. Resale shall
              be unrestricted except as provided herein. GTE shall also provide
              service functions, as set forth in Section 3.4 of this Article.
              The Telecommunications Services and service functions provided by
              GTE to MCIm pursuant to this Article are collectively referred to
              as "Local Resale."

         1.2  To the extent that this Article describes services which GTE
              shall make available to MCIm for resale pursuant to this
              Agreement, this list of services is neither all inclusive nor
              exclusive. All Telecommunications Services of GTE which are to be
              offered for resale are subject to the terms herein.

         1.7  GTE shall allow MCIm to initiate "as is transfers" of local
              exchange Telecommunications Services. For purposes of this
              Section 1.7, an "as is transfer" is the transfer of all the
              Telecommunications Services and features available for resale
              that are currently being provided for the specified account
              without the requirement of a specific enumeration of the services
              and features on the LSR without interruption of service.

ARTICLE V, SECTION 2

2.       No Restrictions on Resale.  MCIm may resell to any and all classes of 
         end users Telecommunications Services obtained from GTE under this
         Agreement and subject to applicable tariffs.  GTE will not prohibit nor
         impose unreasonable or discriminatory conditions or limitations on the
         resale of its Telecommunications Services.  GTE agrees to remove all
         tariff restrictions which prohibit or limit the aggregation and resale
         of any such Telecommunications Services, including, but not limited to,
         CENTREX aggregation, feature and service aggregation, and resale of
         Telecommunications Services to another reseller.  Notwithstanding the
         foregoing, to the extent that there is a conflict between the terms,
         conditions and other matters in such tariffs, and any specific
         provision of this Agreement, the terms and conditions of this Agreement
         shall control.


         2.1  Restrictions on Resale:
                  

                                     N-1
<PAGE>   235

              2.1.1     MCIm agrees not to resell Residential Access Lines 
                        to non-residential subscribers.

              2.1.2     MCIm may not use an STS switch as a Central Office 
                        Switch to provide local exchange services.

         2.2  Services Available for Resale Without an Avoided Cost Discount:

              2.2.1     The following services are available for resale 
                        without an avoided cost discount:

                             2.2.1.1   Switched and special access;

                             2.2.1.2   Cellular interconnection;

                             2.2.1.3   Distance learning;

                             2.2.1.4   976 Service;

                             2.2.1.5   Promotional offerings of less than 
                                       ninety (90) days;

                             2.2.1.6   TSPS; and

                             2.2.1.7   Existing Individual Case Basis ("ICB")
                                       customer specific contracts.

ARTICLE V, SECTION 3

3.       Services Not Available for Resale.

         3.1  The following services are not available for resale:

              3.1.1     Inside Wire maintenance; 

              3.1.2     Voice Mail;

              3.1.3     Public pay telephone lines (except as noted in Sections 
                        3.2.11 and 3.2.12); and 

              3.1.4     Semi-Public pay telephone lines (except as noted in 
                        Sections 3.2.11 and 3.2.12).

ARTICLE VI, SECTION 2

2.       Unbundled Network Elements.

         2.1  GTE shall offer Network Elements to MCIm on an unbundled basis
              on rates, terms and conditions that are just, reasonable, and
              non-discriminatory in accordance with the terms and conditions of
              this Agreement.

APPENDIX C, SECTION 1

1.       Services.

         1.1  Local Service Resale. The prices charged to DTI for Local
              Service shall be calculated using the avoided cost discount
              applicable in Texas, determined on the basis of the retail rate
              charged to subscribers for the telecommunications service
              requested. The interim wholesale discount shall be



                                     N-2
<PAGE>   236

              22.99% off the  applicable  retail  rate for all GTE  services
              subject to resale.  Those  services  identified  in Article V,
              Section 2, will be  available  for  resale  without an avoided
              cost  discount.  This interim  discount shall remain in effect
              until the Commission determines a permanent wholesale discount in
              accordance  with the Act. Once  determined,  said wholesale
              discount  shall apply instead of the interim  discount for the
              remaining Term of this Agreement.

         1.2  The prices shall be based on GTE's retail rates (including all
              promotions and contracts as described I Article V) applicable on
              the Effective Date, less the applicable discount. If GTE changes
              its retail rates after DTI executes this Agreement, the
              applicable discount shall be applied to the retail rates as
              changed.

              1.2.1     Non-recurring Charges for Resale Services:

                        1.2.1.1   With the exception of the Changeover
                                  Service Order Charge, non-recurring charges
                                  for Resale Services shall be at the
                                  applicable tariffed rate less the avoided
                                  cost discount.

                        1.2.1.2   Besides a "changeover" charge, GTE
                                  shall not charge any additional non-recurring
                                  charges to switch a customer from GTE to DTI.
                                  If a customer changes its service to DTI and
                                  orders services in addition to those supplied
                                  by its previous local service provider, GTE
                                  shall charge DTI the Subsequent Service Order
                                  Charge stated in Appendix 44A and no other
                                  charges shall apply.

                        1.2.3     PIC change charges shall apply whenever 
                                  the primary IXC selection for a resale 
                                  customer is changed by DTI.

         1.3  Unbundled Network Elements. The recurring and non-recurring
              prices charged to DTI for specific Network Elements are in
              Attachment I to this Appendix. The prices listed in this Appendix
              are interim only and are subject to change to conform with the
              rates for Unbundled Network Elements and non-recurring charges as
              ordered by the Commission subsequent to the Effective Date of
              this Agreement. Once the Commission-determined prices are
              adopted, said prices will be substituted for the interim prices
              and shall apply for the remainder of the Term of this Agreement,
              unless otherwise changed by the Commission.

                                     N-3

<PAGE>   237


            TERMS/PRICES ADOPTED FROM THE MCIm ARBITRATION AGREEMENT
<TABLE>
<CAPTION>
<S>    <C>                                                                          <C>
1.     UNBUNDLED LOOP
       2-Wire Loops, per month                                                      $ 25.49
       4-Wire Loops, per month                                                      $ 36.53
       Specially Conditioned Loops                                                  TBD
       Loop Concentrator/Multiplexer                                                TBD
       Feeder                                                                       TBD
       Distribution                                                                 TBD
2.     NETWORK INTERFACE DEVICE
       Basic NID, per line, per month                                               $  1.44
       12xNID, per line, per month                                                  $  2.04
3.     LOCAL SWITCHING
       2-Wire Port, per month                                                       $  4.28
       DS-1 Port, per month                                                         $ 81.15
       End Office Switching, per MOU                                                $  0.004085154
4.     TANDEM SWITCHING
       Tandem Switching, per avg. MOU                                               $  0.001041118
5.     INTEROFFICE TRANSMISSION
       Common Transport
                Transport termination, per termination per MOU                      $  0.00007125
                Transport Facility per MOU per mile                                 $  0.00000221
       Dedicated Transport
                DS-0/Voice Grade Facility per Air-Line-Mile, per month              $  2.60
                DS-1 Facility per Air-Line-Mile, per month                          $  0.97
                DS-1 per Termination, per month                                     $ 31.02
                DS-3 Facility per Air-Line-Mile, per month                          $ 24.50
                DS-3 per termination, per month                                     $315.90
       Multiplexing
                DS-1 to Voice MUX, per month                                        $
                DS-3 to DS-1 MUX, per month                                         $
6.     NONRECURRING CHARGES
       6.1      UNBUNDLED SERVICES
                Element Ordering (loop or port)
                         Initial Element Order, per order                           $ 47.25
                         Transfer of Elements Charge, per order                     $ 16.00
                         Subsequent Element Order, per order                        $ 24.00
                         Customer Service Record Search, per request                $  5.25
                Installation
                         Unbundled Loop, per loop                                   $ 11.00
                         Unbundled Port, per port                                   $ 11.00
                         Loop Facility Charge, per order (*Note 1)                  $ 64.00
       6.2      RESALE SERVICES (*Note 2)
                Initial Service Order per order                      Service Order Charge Primary, each
                Changeover Service Order Charge (*Note 3)            Secondary Service Order Charge

</TABLE>



                                     N-4
<PAGE>   238


<TABLE>
 <S>                                                                 <C>
                Subsequent Service Order, per order                  Service Order Charge, Secondary Charge
                Installation, Per Line                               Line Connection Charge, per line
                Outside Facility Connection Charge,                  Premises Visit Charge, each; any
                per order (*Note 4)                                  applicable Line Extension or Special
                                                                     Construction Charges; any other
                                                                     applicable tariffed charges
                PIC Change Charge                                                   $ 4.48

7.     BILLING AND RECORDING                                                        TBD

</TABLE>







(*NOTE 1)     The Loop Facility Charge will apply when field work is required
              for establishment of new unbundled loop service.

(*NOTE 2)     The following charges listed are to be taken from GTE's retail
              services tariff and are subject to the wholesale discount of
              22.99%.

(*NOTE 3)     Not subject to the wholesale discount.

(*NOTE 4)     The Outside Facility Charge will apply when field wok is
              required for establishment of new resale service. The terms,
              conditions and rules that apply for this work are described in
              GTE's retail local service tariffs.


                                     N-5

<PAGE>   239




                                 APPENDIX 46B
                                  GTE TERMS
                      GTE/DTI OPT-IN NEGOTIATION ISSUES

Pursuant to Section 46 of Article III of this Agreement and subject to all of
the terms and conditions of that Section 46, each of the following rates or
terms may be replaced or supplemented by the correlative rate or term set forth
in the MCIm TERMS listed in Appendix 46A, as and when provided in Section 46 and
only until, as long as, and under the conditions prescribed by Section 46.

- -        The resale discount and rates in Appendix F. 

- -        Sections 2.2, 2.3, 3.3, 5.2  and 5.3, or Article VI.

- -        Sections 2.1, 2.2 and 2.3 of Article VII.





  
                                     O-1


<PAGE>   1

                                                                   EXHIBIT 10.27
 


Sprint


                        MASTER RESALE AGREEMENT

                                  with

                         DIGITAL TELEPORT INC.






















<PAGE>   2


                           TABLE OF CONTENTS

<TABLE>
<CAPTION>
                                                                        Page No.
<S>  <C>          <C>                                                   <C>
PART A - INTERCONNECTION AND RESALE AGREEMENT                           1

     PART A-GENERAL TERMS AND CONDITIONS                                1

     Section 1.    Scope of this Agreement                              1
     Section 2.    Regulatory Approvals                                 2
     Section 3.    Term and Termination                                 4
     Section 4.    Charges and Payment                                  5
     Section 5.    Audits and Examinations                              5
     Section 6.    Bona Fide Request Process for Further Unbundling     7
     Section 7.    Intellectual Property Rights                         8
     Section 8.    Limitation of Liability                              8
     Section 9.    Indemnification                                      9
     Section 10.   Remedies                                             10
     Section 11.   Branding                                             10
     Section 12.   Confidentiality and Publicity                        11
     Section 13.   Warranties                                           13
     Section 14.   Assignment and Subcontract                           13
     Section 15.   Governing Law                                        13
     Section 16.   Relationship of Parties                              14
     Section 17.   No Third Party Beneficiaries                         14
     Section 18.   Notices                                              14
     Section 19.   Waivers                                              14
     Section 20.   Survival                                             15
     Section 21.   Force Majeure                                        15
     Section 22.   Dispute Resolution                                   15
     Section 23.   Taxes                                                16
     Section 24.   Responsibility for Environmental Hazards             17
     Section 25.   Amendments and Modifications                         19
     Section 26.   Severability                                         19
     Section 27.   Headings Not Controlling                             19
     Section 28.   Entire Agreement                                     19
     Section 29.   Counterparts                                         20
     Section 30.   Successors and Assigns                               20
     Section 31.   Implementation Plan                                  20

PART B - DEFINITIONS                                                    23
</TABLE>



<PAGE>   3


<TABLE>
<S>  <C>          <C>   <C>                                                     <C>
PART C - ATTACHMENT I - PRICE SCHEDULE                                          33

     1.   General Principles                                                    33
     2.   Local Service Resale                                                  33
     3.   Interconnection and Reciprocal Compensation                           33
     4.   Unbundled Network Elements                                            34

PART C - ATTACHMENT II - LOCAL RESALE                                           35

     Section 1.   Telecommunications Services Provided for Resale               35
     Section 2.   General Terms and Conditions                                  35
                  2.1 Pricing                                                   35
                  2.2 Requirements for Specific Services                        35
                        2.2.1 CENTREX Requirements                              35
                        2.2.2 Voluntary Federal and State Subscriber Financial
                              Assistance Programs                               36
                        2.2.3 Grandfathered Services                            37
                        2.2.4 N11 Service                                       37
                        2.2.5 Contract Service Arrangements, Special Ar-
                              rangements, and Promotions                        37
                        2.2.6 COCOT Lines                                       37
                        2.2.7 Voice Mail Service                                38
                        2.2.8 Hospitality Service                               38
                        2.2.9 Telephone Line Number Calling Cards               38

PART C - ATTACHMENT III - NETWORK ELEMENTS                                      39

     Section 1.   General                                                       39
     Section 2.   Unbundled Network Elements                                    39
                  2.3 Standards for Network Elements                            39
     Section 3.   Loop                                                          40
                  3.1 Definition                                                40
     Section 4.   Local Switching                                               42
                  4.1 Definition                                                42
                  4.2 Technical Requirements                                    42
                  4.3 Interface Requirements                                    43
     Section 5.   Directory Assistance Service                                  43
     Section 6.   Operator Services                                             44
     Section 7.   Transport                                                     44
                  7.1 Common Transport                                          44
                  7.2 Dedicated Transport                                       45
     Section 8.   Tandem Switching                                              45
                  8.1 Definition                                                45
                  8.2 Technical Requirements                                    46
                  8.3 Interface Requirements                                    47
</TABLE>



<PAGE>   4

<TABLE>
<S>  <C>          <C>                                                           <C>
     Section 9.   Network Interface Device                                      47
                  9.1 Definition                                                47
                  9.2 Technical Requirements                                    48
     Section 10.   Signaling Systems and Databases                              49
                  10.1 Signaling Link Transport                                 49
                  10.2 Line Information Database (LIDB)                         52
                  10.3 Toll Free Number Database                                54

Part C - ATTACHMENT IV - INTERCONNECTION                                        55

     Section 1.   Local Interconnection Trunk Arrangement                       55
     Section 2.   Compensation Mechanisms                                       56
                  2.1 Interconnection Point                                     56
                  2.2 Compensation for Local Traffic Transport and
                      Termination                                               56
     Section 3.   Signaling                                                     57
     Section 4.   Network Servicing                                             58
                  4.1 Trunk Forecasting                                         58
                  4.2 Grade of Service                                          59
                  4.3 Trunk Servicing                                           59
     Section 5.   Network Management                                            59
                  5.1 Protective Protocols                                      59
                  5.2 Expansive Protocols                                       60
                  5.3 Mass Calling                                              60
     Section 6.   Usage Measurement                                             60
     Section 7.   Responsibilities of the Parties                               61

PART C - ATTACHMENT V - COLLOCATION                                             63

     Section 1 Introduction                                                     63
     Section 2 Technical Requirements                                           63
     Section 3 Physical Security                                                80
     Section 4 License                                                          83
     Section 5 Technical References                                             83

PART C - ATTACHMENT VI - RIGHTS OF WAY (ROW), CONDUITS,
  POLE ATTACHMENTS                                                              85

     Section 1.   Introduction                                                  85
     Section 2.   Definitions                                                   85
     Section 3.   Requirements                                                  87
                  3.1 General                                                   87
                  3.2 Pre-Ordering Disclosure Requirements                      88
                  3.3 Attachment Requests                                       89
                  3.4 Authority to Place Attachments                            91
</TABLE>



<PAGE>   5


<TABLE>
<S>  <C>          <C>                                                           <C>
                  3.5  Capacity                                                 92
                  3.6  Sharing of Right of Way                                  93
                  3.7  Emergency Situations                                     93
                  3.8  Attachment Fees                                          93
                  3.9  Additions and Modifications to Existing Attachments      94
                  3.10 Noncompliance                                            95
                  3.11 Surveys and Inspections of Attachments                   95
                  3.12 Notice of Modification or Alteration of Poles, Ducts,
                       Conduits, or Other ROW by Sprint                         95
                  3.13 Termination of Section 3 or An Individual
                       Attachment by CLEC                                       96
                  3.14 Abandonment                                              96
                  3.15 Dispute Resolution Procedures                            97

PART C - ATTACHMENT VII - INTERIM NUMBER PORTABILITY                            98

     Section 1.   Sprint Provision of Interim Number Portability                98
     Section 2.   Interim Number Portability (INP)                              98
     Section 3.   Requirements for INP                                          100
                  3.1 Cut-Over Process                                          100
                  3.2 Testing                                                   100
                  3.3 Installation Timeframes                                   100
                  3.4 Call Referral Announcements                               101
                  3.5 Engineering and Maintenance                               101
                  3.6 Operator Services and Directory Assistance                101
                  3.7 Number Reservation                                        102

PART C - ATTACHMENT VIII - GENERAL BUSINESS REQUIRE-
  MENTS                                                                         103

     Section 1.   General Business Requirements                                 103
                  1.1 Procedures                                                103
                  1.2 Service Offerings                                         104
     Section 2.   Ordering and Provisioning                                     105
                  2.1 General Business Requirements                             105
                  2.2 Service Order Process Requirements                        107
                  2.3 Systems Interfaces and Information Exchanges              111
                  2.4 Standards                                                 114
     Section 3.   Billing                                                       114
                  3.1 Procedures                                                114
                  3.2 Revenue Protection                                        116
     Section 4.   Provision of Subscriber Usage Data                            116
                  4.1 Procedures                                                116
                  4.2 Information Exchange and Interfaces                       121
</TABLE>



<PAGE>   6



<TABLE>
<S>  <C>          <C>                                                           <C>
     Section 5.   General Network Requirements                                  121
     Section 6.   Miscellaneous Services and Functions                          123
                  6.0 General                                                   123
                  6.1 General Requirements                                      123
                  6.2 Systems Interfaces and Exchanges                          141

PART C - ATTACHMENT IX - Reporting Standards                                    151

     Section 1.   General                                                       151
     Section 2.   Parity and Quality Measurements                               151
</TABLE>















<PAGE>   7


                                 PART A

                  INTERCONNECTION AND RESALE AGREEMENT

     This Interconnection and Resale Agreement (the Agreement"), entered into
this 30th day of September 1997, is entered into by and between Digital
Teleport Inc.   (DTI) ("CLEC"), a Missouri corporation, and United Telephone
Company of Kansas ("Sprint''), a Kansas corporation, to establish the rates,
terms and conditions for local interconnection, local resale, and purchase of
unbundled network elements (individually referred to as the "service" or
collectively as the "services").

     WHEREAS, the Parties wish to interconnect their local exchange networks in
a technically and economically efficient manner for the transmission and
termination of calls, so that customers of each can seamlessly receive calls
that originate on the other's network and place calls that terminate on the
other's network, and for CLEC's use in the provision of exchange access ("Local
Interconnection"); and

     WHEREAS, CLEC wishes to purchase Telecommunications Services for resale to
others, and Sprint is willing to provide such service; and

     WHEREAS, CLEC wishes to purchase unbundled network elements, ancillary
services and functions and additional features ("Network Elements"), and to use
such services for itself or for the provision of its Telecommunications
Services to others, and Sprint is willing to provide such services; and

     WHEREAS, the Parties intend the rates, terms and conditions of this
Agreement, and their performance of obligations thereunder, to comply with the
Communications Act of 1934, as amended by the Telecommunications Act of 1996
(the "Act"), the Rules and Regulations of the Federal Communications Commission
("FCC"), and the orders, rules and regulations of the Missouri Public Service
Commission (the "Commission");

     Now, therefore, in consideration of the terms and conditions contained
herein, CLEC and Sprint hereby mutually agree as follows:

PART A -- GENERAL TERMS AND CONDITIONS
SECTION 1.           SCOPE OF THIS AGREEMENT

            1.1 This Agreement, including Parts A, B, and C, specifies the
            rights and obligations of each party with respect to the
            establishment, purchase, and sale of Local Interconnection, resale
            of Telecommunications Services and Unbundled Network Elements.
            This PART A sets forth the general




<PAGE>   8


            terms and conditions governing this Agreement.   Certain terms used
            in this Agreement shall have the meanings defined in PART B --
            DEFINITIONS, or as otherwise elsewhere defined throughout this
            Agreement.   Other terms used but not defined herein will have the
            meanings ascribed to them in the Act, in the FCC's, and in the
            Commission's Rules and Regulations.   PART C sets forth, among
            other things, descriptions of the services, pricing, technical and
            business requirements, and physical and network security
            requirements.

                     LIST OF ATTACHMENTS COMPRISING PART C:


<TABLE>
                      <S>   <C>
                      I.    Price Schedule
                      II.   Local Resale
                      III.  Network Elements
                      IV.   Interconnection
                      V.    Collocation
                      VI.   Rights of Way
                      VII.  Number Portability
                      VIII. General Business Requirements
                      IX.   Reporting Standards
</TABLE>


            1.2 Sprint shall not discontinue any interconnection arrangement,
            Telecommunications Service, or Network Element provided or required
            hereunder without providing CLEC thirty (30) days' prior written
            notice of such discontinuation of such service, element or
            arrangement.   Sprint agrees to cooperate with CLEC with any
            transition resulting from such discontinuation of service and to
            minimize the impact to customers which may result from such
            discontinuance of service.

            1.3 Sprint shall provide notice of network changes and upgrades in
            accordance with Sections 51.325 through 51.335 of Title 47 of the
            Code of Federal Regulations.

            1.4 The services and facilities to be provided to CLEC by Sprint in
            satisfaction of this Agreement may be provided pursuant to Sprint
            tariffs and then current practices.   Should there be a conflict
            between the terms of this Agreement and any such tariffs and
            practices, the terms of the tariff shall control to the extent
            allowed by law or Commission order.

SECTION 2. REGULATORY APPROVALS

            2.1 This Agreement, and any amendment or modification hereof, will
            be submitted to the Commission for approval in accordance with
            Section 252 of the Act.   Sprint and CLEC shall use their best
            efforts to obtain approval of this Agreement by any regulatory body
            having jurisdiction




<PAGE>   9


            over this Agreement and to make any required tariff modifications
            in their respective tariffs, if any.   CLEC shall not order
            services under this Agreement before Approval Date except as may
            otherwise be agreed in writing between the Parties.   In the event
            any governmental authority or agency rejects any provision hereof,
            the Parties shall negotiate promptly and in good faith such
            revisions as may reasonably be required to achieve approval.

            2.2 Notwithstanding the above provisions, or any other provision in
            this Agreement, this Agreement and any Attachments hereto are
            subject to such changes or modifications with respect to the rates,
            terms or conditions contained herein as may be ordered, allowed or
            directed by the Commission or the FCC, or as may be required to
            implement the result of an order or direction of a court of
            competent jurisdiction with respect to its review of any appeal of
            the decision of the Commission or the FCC, in the exercise of their
            respective jurisdictions whether said changes or modifications
            result from an order issued on an appeal of the decision of the
            Commission or the FCC, a rulemaking proceeding, a generic
            investigation, a tariff proceeding, a costing/pricing proceeding,
            or an arbitration proceeding conducted by the Commission or FCC
            which applies to Sprint or in which the Commission or FCC makes a
            generic determination) to the extent that CLEC had the right and/or
            opportunity to participate in said proceeding (regardless of
            whether CLEC actually participates.).   Any rates, terms or
            conditions thus developed or modified shall be substituted in place
            of those previously in effect and shall be deemed to have been
            effective under this Agreement as of the effective date of the
            order by the court, Commission or the FCC, whether such action was
            commenced before or after the effective date of this Agreement.
            If any such modification renders the Agreement inoperable or
            creates any ambiguity or requirement for further amendment to the
            Agreement, the Parties will negotiate in good faith to agree upon
            any necessary amendments to the Agreement.   Should the Parties be
            unable to reach agreement with respect to the applicability of such
            order or the resulting appropriate modifications to this Agreement,
            the Parties agree to petition such Commission to establish
            appropriate interconnection arrangements under sections 251 and 252
            of the Act in light of said order or decision.

            2.3 In the event Sprint is required by any governmental authority
            or agency to file a tariff or make another similar filing in
            connection with the performance of any action that would otherwise
            be governed by this Agreement, Sprint shall make reasonable efforts
            to provide to CLEC its proposed tariff prior to such filing.   The
            other services covered by this Agreement and not covered by such
            decision or order shall remain unaffected and shall remain in full
            force and effect.




<PAGE>   10


            2.4 The Parties intend that any additional services requested by
            either party relating to the subject matter of this Agreement will
            be incorporated into this Agreement by amendment.

SECTION 3. TERM AND TERMINATION

            3.1 This Agreement shall be deemed effective upon the Approval
            Date.   No order or request for services under this Agreement shall
            be processed until this Agreement is so approved unless otherwise
            agreed to, in writing by the Parties.

            3.2 Except as provided herein, Sprint and CLEC agree to provide
            service to each other on the terms defined in this Agreement for a
            period of one year, and thereafter the Agreement shall continue in
            force and effect unless and until terminated as provided herein.

            3.3 Either party may terminate this Agreement at the end of the
            term by providing written notice of termination to the other party,
            such written notice to be provided at least 180 days in advance of
            the date of termination.   In the event of such termination
            pursuant to this Section 3.3, for service arrangements made
            available under this Agreement and existing at the time of
            termination, those arrangements shall continue without interruption
            under either (a) a new agreement executed by the Parties, or (b)
            standard interconnection terms and conditions contained in Sprint's
            tariff or other substitute document that are approved and made
            generally effective by the Commission or the FCC.

            3.4 In the event of default, either Party may terminate this
            Agreement in whole or in part provided that the non-defaulting
            Party so advises the defaulting Party in writing of the event of
            the alleged default and the defaulting Party does not remedy the
            alleged default within 60 days after written notice thereof.
            Default is defined to include:

                             a. Either Party's insolvency or initiation of
                        bankruptcy or receivership proceedings by or against
                        the Party; or

                             b. Either Party's material breach of any of the
                        terms or conditions hereof, including the failure to
                        make any undisputed payment when due.

            3.5 Termination of this Agreement for any cause shall not release
            either Party from any liability which at the time of termination
            has already accrued to the other Party or which thereafter may
            accrue in respect to




<PAGE>   11


            any act or omission prior to termination or from any obligation
            which is expressly stated herein to survive termination.

            3.6 If Sprint sells or trades substantially all the assets used to
            provide Telecommunications Services, Local Interconnection, or
            Network Elements in a particular exchange or group of exchanges
            Sprint may terminate this Agreement in whole or in part as to a
            particular exchange or group of exchanges upon sixty (60) days
            prior written notice.

SECTION 4. CHARGES AND PAYMENT

            4.1 In consideration of the services provided by Sprint under this
            Agreement, CLEC shall pay the charges set forth in Attachment I
            subject to the provisions of Section 2.3 hereof  The billing and
            payment procedures for charges incurred by CLEC hereunder are set
            forth in Attachment VIII.

            4.2 In addition to any other applicable charges under this Section
            4 and Attachment I, if CLEC purchases unbundled Local Switching
            elements, CLEC shall pay Sprint:

                  4.2.1 for intrastate toll minutes of use traversing such
                  unbundled Local Switching elements, intrastate access charges
                  comparable to those listed in 4.2.1 above and any explicit
                  intrastate universal service mechanism based on access
                  charges.

            4.3 Sprint will not accept any new or amended orders for
            Telecommunications Services, Unbundled Network Elements,
            Interconnection or other services under the terms of this Agreement
            from CLEC while any past due, undisputed charges remain unpaid.

SECTION 5. AUDITS AND EXAMINATIONS

            5.1 As used herein "Audit" shall mean a comprehensive review of
            services performed under this Agreement; "Examination" shall mean
            an inquiry into a specific element of or process related to
            services performed under this Agreement (e.g., examination and
            verification of LOAs).   Either party (the "Requesting Party") may
            perform one (1) Audit per 12-month period commencing with the
            Approval Date.   The Requesting Party may perform Examinations as
            it deems necessary.

            5.2 Upon thirty (30) days written notice by the Requesting Party to
            Audited Party, Requesting Party shall have the right through its
            authorized representative to make an Audit or Examination, during
            normal




<PAGE>   12


            business hours, of any records, accounts and processes which
            contain information bearing upon the provision of the services
            provided and performance standards agreed to under this Agreement.
            Within the above-described 30-day period, the Parties shall
            reasonably agree upon the scope of the Audit or Examination, the
            documents and processes to be reviewed, and the time, place and
            manner in which the Audit or Examination shall be performed.
            Audited Party agrees to provide Audit or Examination support,
            including appropriate access to and use of Audited Party's
            facilities (e.g., conference rooms, telephones, copying machines).

            5.3 Each party shall bear its own expenses in connection with the
            conduct of the Audit or Examination.   The reasonable cost of
            special data extraction required by the Requesting Party to conduct
            the Audit or Examination will be paid for by the Requesting Party.
            For purposes of this Section 5.3, a "Special Data Extraction"
            shall mean the creation of an output record or informational report
            (from existing data files) that is not created in the normal course
            of business.   If any program is developed to Requesting Party's
            specifications and at Requesting Party's expense, Requesting Party
            shall specify at the time of request whether the program is to be
            retained by Audited party for reuse for any subsequent Audit or
            Examination.

            5.4 Adjustments, credits or payments shall be made and any
            corrective action shall commence within thirty (30) days from
            Requesting Party's receipt of the final audit report to compensate
            for any errors or omissions which are disclosed by such Audit or
            Examination and are agreed to by the Parties.   One and one half (1
            1/2%) or the highest interest rate allowable by law for commercial
            transactions shall be assessed and shall be computed by compounding
            daily from the time of the overcharge to the day of payment or
            credit.

            5.5 Neither such right to examine and audit nor the right to
            receive an adjustment shall be affected by any statement to the
            contrary appearing on checks or otherwise, unless such statement
            expressly waiving such right appears in writing, is signed by the
            authorized representative of the party having such right and is
            delivered to the other party in a manner sanctioned by this
            Agreement.

            5.6 This Section 5 shall survive expiration or termination of this
            Agreement for a period of two (2) years after expiration or
            termination of this Agreement.




<PAGE>   13


SECTION 6. BONA FIDE REQUEST PROCESS FOR FURTHER UNBUNDLING

            6.1 Each Party shall promptly consider and analyze access to
            categories of unbundled Network Elements not covered in this
            Agreement with the submission of a Network Element Bona Fide
            Request hereunder.   The Network Element Bona Fide Request process
            set forth herein does not apply to those services requested
            pursuant to FCC Rule Section 51.319 adopted in First Report &
            Order, CC Docket No.  96-98, (rel. Aug. 8, 1996).

            6.2 A Network Element Bona Fide Request shall be submitted in
            writing and shall include a technical description of each requested
            Network Element.

            6.3 The requesting Party may cancel a Network Element Bona Fide
            Request at any time, but shall pay the other Party's reasonable and
            demonstrable costs of processing and/or implementing the Network
            Element Bona Fide Request up to the date of cancellation.

            6.4 Within ten (10) business days of its receipt, the receiving
            Party shall acknowledge receipt of the Network Element Bona Fide
            Request.

            6.5 Except under extraordinary circumstances, within thirty (30)
            days of its receipt of a Network Bona Fide Request, the receiving
            Party shall provide to the requesting Party a preliminary analysis
            of such Network Element Bona Fide Request.  The preliminary
            analysis shall confirm that the receiving Party will offer access
            to the Network Element or will provide a detailed explanation that
            access to the Network Element does not qualify as a Network Element
            that is required to be provided under the Act.

            6.6 Upon receipt of the preliminary analysis, the requesting Party
            shall, within thirty (30) days, notify the receiving Party of its
            intent to proceed or not to proceed.

            6.7 The receiving Party shall promptly proceed with the Network
            Element Bona Fide Request upon receipt of written authorization
            from the requesting Party.   When it receives such authorization,
            the receiving Party shall promptly develop the requested services,
            determine their availability, calculate the applicable prices and
            establish installation intervals.

            6.8 As soon as feasible, but not more than ninety (90) days after
            its receipt of authorization to proceed with developing the Network
            Element Bona Fide Request, the receiving Party shall provide to the
            requesting




<PAGE>   14


            Party a Network Element Bona Fide Request quote which will include,
            at a minimum, a description of each Network Element, the
            availability, the applicable rates and the installation intervals.

            6.9 Within thirty (30) days of its receipt of the Network Element
            Bona Fide Request quote, the requesting Party must either confirm
            its order for the Network Bona Fide Request pursuant to the Network
            Element Bona Fide Request quote or seek arbitration by the
            Commission pursuant to Section 252 of the Act.

            6.10 If a Party to a Network Element Bona Fide Request believes
            that the other Party is not requesting, negotiating or processing
            the Network Element Bona Fide Request in good faith, or disputes a
            determination, or price or cost quote, such Party may seek
            mediation or arbitration by the Commission pursuant to Section 252
            of the Act.

SECTION 7. INTELLECTUAL PROPERTY RIGHTS

            Any intellectual property which originates from or is developed by
            a Party shall remain in the exclusive ownership of that Party.
            Except for a limited license to use patents or copyrights to the
            extent necessary for the Parties to use any facilities or equipment
            (including software) or to receive any service solely as provided
            under this Agreement, no license in patent, copyright, trademark or
            trade secret, or other proprietary or intellectual property right
            now or hereafter owned, controlled or licensable by a Party, is
            granted to the other Party or shall be implied or arise by
            estoppel.   It is the responsibility of each Party to ensure at no
            separate, additional cost to the other Party that it has obtained
            any necessary licenses in relation to intellectual property of
            third parties used in its network that may be required to enable
            the other Party to use any facilities or equipment (including
            software), to receive any service, or to perform its respective
            obligations under this Agreement.   For the avoidance of doubt, the
            foregoing sentence shall not preclude Sprint from charging CLEC for
            such costs as permitted under a Commission order.

SECTION 8. LIMITATION OF LIABILITY

            Except as otherwise set forth in this Agreement, neither Party
            shall be responsible to the other for any indirect, special,
            consequential or punitive damages, including (without limitation)
            damages for loss of anticipated profits or revenue or other
            economic loss in connection with or arising from anything said,
            omitted, or done hereunder (collectively "Consequential Damages"),
            whether arising in contract or tort, provided that the foregoing
            shall not limit a Party's obligation under Section 9 to




<PAGE>   15


            indemnify, defend, and hold the other party harmless against
            amounts payable to third parties.   Notwithstanding the foregoing,
            in no event shall Sprint's liability to CLEC for a service outage
            exceed an amount equal to the proportionate charge for the
            service(s) or unbundled element(s) provided for the period during
            which the service was affected.

SECTION 9. INDEMNIFICATION

            9.1 Each Party agrees to indemnify and hold harmless the other
            Party from and against claims for damage to tangible personal or
            real property and/or personal injuries arising out of the
            negligence or willful act or omission of the indemnifying Party or
            its agents, servants, employees, contractors or representatives.
            To the extent not prohibited by law, each Party shall defend,
            indemnify, and hold the other Party harmless against any loss to a
            third party arising out of the negligence or willful misconduct by
            such indemnifying Party, its agents, or contractors in connection
            with its provision of service or functions under this Agreement.
            In the case of any loss alleged or made by a Customer of either
            Party, the Party whose customer alleged such loss shall indemnify
            the other Party and hold it harmless against any or all of such
            loss alleged by each and every Customer.   The indemnifying Party
            under this Section agrees to defend any suit brought against the
            other Party either individually or jointly with the indemnifying
            Party for any such loss, injury, liability, claim or demand.   The
            indemnified Party agrees to notify the other Party promptly, in
            writing, of any written claims, lawsuits, or demands for which it
            is claimed that the indemnifying Party is responsible under this
            Section and to cooperate in every reasonable way to facilitate
            defense or settlement of claims.  The indemnifying Party shall have
            complete control over defense of the case and over the terms of any
            proposed settlement or compromise thereof.   The indemnifying Party
            shall not be liable under this Section for settlement by the
            indemnified Party of any claim, lawsuit, or demand, if the
            indemnifying Party has not approved the settlement in advance,
            unless the indemnifying Party has had the defense of the claim,
            lawsuit, or demand tendered to it in writing and has failed to
            assume such defense.   In the event of such failure to assume
            defense, the indemnifying Party shall be liable for any reasonable
            settlement made by the indemnified Party without approval of the
            indemnifying Party.




<PAGE>   16


            9.2 Each Party agrees to indemnify and hold harmless the other
            Party from all claims and damages arising from the Indemnifying
            Party's discontinuance of service to one of the Indemnifying
            Party's subscribers for nonpayment.

            9.3 When the lines or services of other companies and Carriers are
            used in establishing connections to and/or from points not reached
            by a Party's lines, neither Party shall be liable for any act or
            omission of the other companies or Carriers.

            9.4 In addition to its indemnity obligations hereunder, each Party
            shall, to the extent allowed by law or Commission Order, provide,
            in its tariffs and contracts with its subscribers that relate to
            any Telecommunications Services or Network Element provided or
            contemplated under this Agreement, that in no case shall such Party
            or any of its agents, contractors or others retained by such Party
            be liable to any subscriber or third party for (i) any loss
            relating to or arising out of this Agreement, whether in contract
            or tort, that exceeds the amount such Party would have charged the
            applicable subscriber for the service(s) or function(s) that gave
            rise to such loss, and (ii) Consequential Damages (as defined in
            Section 8 above).

SECTION 10. REMEDIES

            10.1 In addition to any other rights or remedies, and unless
            specifically provided here and to the contrary, either Party may
            sue in equity for specific performance.

            10.2 Except as otherwise provided herein, all rights of
            termination, cancellation or other remedies prescribed in this
            Agreement, or otherwise available, are cumulative and are not
            intended to be exclusive of other remedies to which the injured
            Party may be entitled at law or equity in case of any breach or
            threatened breach by the other Party of any provision of this
            Agreement, and use of one or more remedies shall not bar use of any
            other remedy for the purpose of enforcing the provisions of this
            Agreement.

SECTION 11. BRANDING

            11.1 In all cases of operator and directory assistance services
            CLEC provides using services provided by Sprint under this
            Agreement, Sprint shall, where technically feasible, at CLEC's sole
            discretion and expense, brand any and all such services at all
            points of customer contact exclusively as CLEC services, or
            otherwise as CLEC may specify, or be




<PAGE>   17


            provided with no brand at all, as CLEC shall determine.   Sprint
            may not unreasonably interfere with branding by CLEC; provided that
            if there are technical limitations as to the number of CLECs that
            Sprint can brand for, branding will be made available to CLEC
            hereunder on a first come, first serve basis with an allowance for
            an unbranded alternative for all Telecommunications Carriers.

            11.2 CLEC shall provide the exclusive interface to CLEC
            subscribers, except as CLEC shall otherwise specify.   In those
            instances where CLEC requests Sprint personnel to interface with
            CLEC subscribers, such Sprint personnel shall inform the CLEC
            subscribers that they are representing CLEC, or such brand as CLEC
            may specify.

            11.3 All forms, business cards or other business materials
            furnished by Sprint to CLEC subscribers shall bear no corporate
            name, logo, trademark or tradename.

            11.4 Except as specifically permitted by a Party, in no event shall
            either Party provide information to the other Party's subscribers
            about the other Party or the other Party's products or services.

            11.5 Sprint shall provide, for CLEC's review, the methods and
            procedures, training and approaches to be used by Sprint to assure
            that Sprint meets CLEC's branding requirements.

            11.6 This Section 11 shall not confer on either Party any rights to
            the service marks, trademarks and trade names owned by or used in
            connection with services by the other Party, except as expressly
            permitted in writing by the other Party.

SECTION 12. CONFIDENTIALITY AND PUBLICITY

            12.1 All confidential or proprietary information disclosed by
            either Party during the negotiations and the term of this Agreement
            shall be protected by the Parties in accordance with the terms of
            this Section 12.   All information which is disclosed by one party
            ("Disclosing Party") to the other ("Recipient") in connection with
            this Agreement, or acquired in the course of performance of this
            Agreement, shall be deemed confidential and proprietary to the
            Disclosing Party and subject to this Agreement, such information
            including but not limited to, orders for services, usage
            information in any form, and "CPNI", and the rules and regulations
            of the FCC ("Confidential and/or Proprietary Information").

                  12.1.1 For a period of three (3) years from receipt of
                  Confidential Information, Recipient shall (i) use it only for
                  the purpose of




<PAGE>   18


                  performing under this Agreement, (ii) hold it in confidence
                  and disclose it only to employees or agents who have a need
                  to know it in order to perform under this Agreement, and
                  (iii) safeguard it from unauthorized use or Disclosure using
                  no less than the degree of care with which Recipient
                  safeguards its own Confidential Information.

                  12.1.2 Recipient shall have no obligation to safeguard
                  Confidential Information (i) which was in the Recipient's
                  possession free of restriction prior to its receipt from
                  Disclosing Party, (ii) which becomes publicly known or
                  available through no breach of this Agreement by Recipient,
                  (iii) which is rightfully acquired by Recipient free of
                  restrictions on its Disclosure, or (iv) which is
                  independently developed by personnel of Recipient to whom the
                  Disclosing Party's Confidential Information had not been
                  previously disclosed.   Recipient may disclose Confidential
                  Information if required by law, a court, or governmental
                  agency, provided that Disclosing Party has been notified of
                  the requirement promptly after Recipient becomes aware of the
                  requirement, and provided that Recipient undertakes all
                  lawful measures to avoid disclosing such information until
                  Disclosing Party has had reasonable time to obtain a
                  protective order.   Recipient agrees to comply with any
                  protective order that covers the Confidential Information to
                  be disclosed.

                  12.1.3 Each Party agrees that Disclosing Party would be
                  irreparably injured by a breach of this Section 12 by
                  Recipient or its representatives and that Disclosing Party
                  shall be entitled to seek equitable relief, including
                  injunctive relief and specific performance, in the event of
                  any breach of this Section 12.   Such remedies shall not be
                  exclusive, but shall be in addition to all other remedies
                  available at law or in equity.

            12.2 Unless otherwise mutually agreed upon, neither Party shall
            publish or use the other Party's logo, trademark, service mark,
            name, language, pictures, or symbols or words from which the other
            Party's name may reasonably be inferred or implied in any product,
            service, advertisement, promotion, or any other publicity matter,
            except that nothing in this paragraph shall prohibit a Party from
            engaging in valid comparative advertising.   This paragraph 12.3
            shall confer no rights on a Party to the service marks, trademarks
            and trade names owned or used in connection with services by the
            other Party or its Affiliates, except as expressly permitted by the
            other Party.




<PAGE>   19


            12.3 Neither Party shall produce, publish, or distribute any press
            release or other publicity referring to the other Party or its
            Affiliates, or to this Agreement, without the prior written
            approval of the other Party.   Each party shall obtain the other
            Party's prior approval before discussing this Agreement in any
            press or media interviews.   In no event shall either Party
            mischaracterize the contents of this Agreement in any public
            statement or in any representation to a governmental entity or
            member thereof.

            12.4 Except as otherwise expressly provided in this Section 12,
            nothing herein shall be construed as limiting the rights of either
            Party with respect to its customer information under any applicable
            law, including without limitation Section 222 of the Act.

SECTION 13. WARRANTIES

            Except as otherwise provided herein, each Party shall perform its
            obligations hereunder at a performance level at parity with that
            which it uses for its own operations, or those of its Affiliates,
            but in no event shall a party use less than reasonable care in the
            performance of its duties hereunder.

SECTION 14. ASSIGNMENT AND SUBCONTRACT

            Any assignment by either Party to any non-affiliated entity of any
            right, obligation or duty, or of any other interest hereunder, in
            whole or in part, without the prior written consent of the other
            Party shall be void.   A Party assigning this Agreement or any
            right, obligation, duty or other interest hereunder to an Affiliate
            shall provide written notice to the other Party.   All obligations
            and duties of any party under this Agreement shall be binding on
            all successors in interest and assigns of such Party.   No
            assignment hereof shall relieve the assignor of its obligations
            under this Agreement.

SECTION 15. GOVERNING LAW

            This Agreement shall be governed by and construed in accordance
            with the Act, orders of the Commission, and the FCC's Rules and
            Regulations, except insofar as state law may control any aspect of
            this Agreement, in which case the domestic laws of the State of
            Missouri, without regard to its conflicts of laws principles, shall
            govern.




<PAGE>   20


SECTION 16. RELATIONSHIP OF PARTIES

            It is the intention of the Parties that Sprint be an independent
            contractor and nothing contained herein shall constitute the
            Parties as joint venturers, partners, employees or agents of one
            another, and neither Party shall have the right or power to bind or
            obligate the other.

SECTION 17. NO THIRD PARTY BENEFICIARIES

            The provisions of this Agreement are for the benefit of the Parties
            hereto and not for any other person, provided, however, that this
            shall not be construed to prevent CLEC from providing its
            Telecommunications Services to other carriers.   This Agreement
            shall not provide any person not a party hereto with any remedy,
            claim, liability, reimbursement, claim of action, or other right in
            excess of those existing without reference hereto.

SECTION 18. NOTICES

            Except as otherwise provided herein, all notices or other
            communication hereunder shall be deemed to have been duly given
            when made in writing and delivered in person or deposited in the
            United States mail, certified mail, postage prepaid, return receipt
            requested and addressed as follows:


<TABLE>
                       <S>              <C>
                       To   CLEC:       Mr.  Jerry Sheehy
                                        Vice President - IC Support
                                        11111 Dorsett Road
                                        St.  Louis, Missouri 63043

                       To Sprint:       Ms.  Kathy Fulton
                                        Field Service Manager
                                        5454 West 110th Street
                                        Overland Park, Kansas 66211
</TABLE>

            If personal delivery is selected to give notice, a receipt of such
            delivery shall be obtained.   The address to which notices or
            communications may be given to either party may be changed by
            written notice given by such Party to the other pursuant to this
            Section 19.

SECTION 19. WAIVERS

            19.1 No waiver of any provisions of this Agreement and no consent
            to any default under this Agreement shall be effective unless the
            same shall




<PAGE>   21


            be in writing and properly executed by or on behalf of the Party
            against whom such waiver or consent is claimed.

            19.2 No course of dealing or failure of any Party to strictly
            enforce any term, right, or condition of this Agreement in any
            instance shall be construed as a general waiver or relinquishment
            of such term, right or condition.

            19.3 Waiver by either party of any default by the other Party shall
            not be deemed a waiver of any other default.

SECTION 20. SURVIVAL

            The following provisions of this Part A shall survive the
            expiration or termination of this Agreement:   Sections 4, 5, 7, 8,
            9, 10, 11.6, 12, 22, 23 and 24.

SECTION 21. FORCE MAJEURE

            Neither Party shall be held liable for any delay or failure in
            performance of any part of this Agreement from any cause beyond its
            control and without its fault or negligence, such as acts of God,
            acts of civil or military authority, embargoes, epidemics, war,
            terrorist acts, riots, insurrections, fires, explosions,
            earthquakes, nuclear accidents, floods, power blackouts, strikes,
            work stoppage affecting a supplier or unusually severe weather.
            No delay or other failure to perform shall be excused pursuant to
            this Section 21 unless delay or failure and consequences thereof
            are beyond the control and without the fault or negligence of the
            Party claiming excusable delay or other failure to perform.   In
            the event of any such excused delay in the performance of a Party's
            obligation(s) under this Agreement, the due date for the
            performance of the original obligation(s) shall be extended by a
            term equal to the time lost by reason of the delay.   In the event
            of such delay, the delaying Party shall perform its obligations at
            a performance level no less than that which it uses for its own
            operations.   In the event of such performance delay or failure by
            Sprint, Sprint agrees to resume performance in a nondiscriminatory
            manner and not favor its own provision of Telecommunications
            Services above that of CLEC.

SECTION 22. DISPUTE RESOLUTION

            22.1 The Parties recognize and agree that the Commission has
            continuing jurisdiction to implement and enforce all terms and
            conditions of this Agreement.   Accordingly, the Parties agree that
            any dispute arising out of or relating to this Agreement that the
            Parties themselves cannot




<PAGE>   22


            resolve may be submitted to the Commission for resolution.   The
            Parties agree to seek expedited resolution by the Commission, and
            shall request that resolution occur in no event later than sixty
            (60) days from the date of submission of such dispute.   If the
            Commission appoints an expert(s) or other facilitator(s) to assist
            in its decision making, each party shall pay half of the fees and
            expenses so incurred.   During the Commission proceeding each Party
            shall continue to perform its obligations under this Agreement
            provided, however, that neither Party shall be required to act in
            any unlawful fashion.   This provision shall not preclude the
            Parties from seeking relief available in any other forum.

            22.2 If any portion of an amount due to a Party ("the Billing
            Party") under this Agreement is subject to a bona fide dispute
            between the Parties, the Party billed (the "Non-Paying Party")
            shall within thirty (30) days of its receipt of the invoice
            containing such disputed amount give notice to the Billing Party of
            the amounts it disputes ("Disputed Amounts") and include in such
            notice the specific details and reasons for disputing each item.
            The Non-Paying Party shall pay when due all undisputed amounts to
            the Billing Party.   The balance of the Disputed Amount shall
            thereafter be paid with appropriate late charges, if appropriate,
            upon final determination of such dispute.

            22.3 If the Parties are unable to resolve the issues related to the
            Disputed Amounts in the normal course of business within thirty
            (30) days after delivery to the Billing Party of notice of the
            Disputed Amounts, each of the Parties shall appoint a designated
            representative that has authority to settle the dispute and that is
            at a higher level of management than the persons with direct
            responsibility for administration of this Agreement.   The
            designated representatives shall meet as often as they reasonably
            deem necessary in order to discuss the dispute and negotiate in
            good faith in an effort to resolve such dispute.   The specific
            format for such discussions will be left to the discretion of the
            designated representatives, however all reasonable requests for
            relevant information made by one Party to the other Party shall be
            honored.

            22.4 If the Parties are unable to resolve issues related to the
            Dispute Amounts within thirty (30) days after the Parties'
            appointment of designated representatives pursuant to subsection
            22.3, then either Party may file a compliant with the Commission to
            resolve such issues or proceed with any other remedy pursuant to
            law or equity.   The Commission may direct payment of any or all
            funds plus applicable late charges to be paid to either Party.

SECTION 23. TAXES




<PAGE>   23


            Any Federal, state or local excise, license, sales, use, or other
            taxes or tax-like charges (excluding any taxes levied on income)
            resulting from the performance of this Agreement shall be borne by
            the Party upon which the obligation for payment is imposed under
            applicable law, even if the obligation to collect and remit such
            taxes is placed upon the other party.   Any such taxes shall be
            shown as separate items on applicable billing documents between the
            Parties.   The Party obligated to collect and remit taxes shall do
            so unless the other Party provides such Party with the required
            evidence of exemption.   The Party so obligated to pay any such
            taxes may contest the same in good faith, at its own expense, and
            shall be entitled to the benefit of any refund or recovery,
            provided that such party shall not permit any lien to exist on any
            asset of the other party by reason of the contest.  The Party
            obligated to collect and remit taxes shall cooperate fully in any
            such contest by the other Party by providing records, testimony and
            such additional information or assistance as may reasonably be
            necessary to pursue the contest.

SECTION 24. RESPONSIBILITY FOR ENVIRONMENTAL HAZARDS

            24.1 CLEC shall in no event be liable to Sprint for any costs
            whatsoever resulting from the presence or release of any
            Environmental Hazard that CLEC did not cause or introduce to the
            affected work location.   Sprint hereby releases, and shall also
            indemnify, defend (at CLEC's request) and hold harmless CLEC and
            each of CLEC's officers, directors and employees from and against
            any losses and expenses that arise out of or result from (i) any
            Environmental Hazard that Sprint, its contractors or its agents
            introduce to the work locations or (ii) any other presence or
            release of any Environmental Hazard at any work location, except as
            provided in Section 24.2 of this Part A; provided that in the event
            that after CLEC notifies Sprint that CLEC, its employees,
            contractors or agents plan to enter a Sprint work location and
            prior to CLEC or its employees, contractors or agents entering a
            work location Sprint fully informs CLEC in writing of an
            Environmental Hazard at such work location then Sprint shall not be
            obligated to indemnify CLEC for losses and expenses arising out of
            injuries to CLEC employees, contractors or agents resulting from
            their exposure to such Environmental Hazard except to the extent
            such injuries are exacerbated by the acts of Sprint or its
            employees, contractors, or agents.

            24.2 Prior to CLEC or its employees, contractors, or agents
            introducing an Environmental Hazard into a work location CLEC shall
            fully inform Sprint in writing of its planned actions at such work
            location and shall receive Sprint's written permission for such
            actions and CLEC warrants that it shall comply with all legal and
            regulatory obligations it has with




<PAGE>   24


            respect to such Environmental Hazard and notices it is required to
            provide with respect thereto.   Sprint shall in no event be liable
            to CLEC for any costs whatsoever resulting from the presence or
            release of any Environmental Hazard that CLEC causes or introduces
            to the affected work location.   CLEC shall indemnify, defend (at
            Sprint's request) and hold harmless Sprint and each of Sprint's
            officers, directors and employees from and against any losses and
            expenses that arise out of or result from any Environmental Hazard
            that CLEC, its contractors or its agents cause or introduce to the
            work location.   CLEC shall be responsible for obtaining, including
            payment of associated fees, all environmental permits, licenses
            and/or registrations required for environmental hazards CLEC causes
            or introduces to the affected work location.

            24.3 In the event any suspect material within Sprint-owned,
            operated or leased facilities are identified to be
            asbestos-containing, CLEC will, at CLECs expense, notify Sprint
            before commencing any activities and ensure that to the extent any
            activities which it undertakes in the facility disturb any
            asbestos-containing materials (ACM) or presumed asbestos containing
            materials (PACM) as defined in 29 CFR Section 1910.1001, such CLEC
            activities shall be undertaken in accordance with applicable local,
            state and federal environmental and health and safety statutes and
            regulations.   Except for abatement activities undertaken by CLEC
            or equipment placement activities that result in the generation or
            disturbance of asbestos containing material, CLEC shall not have
            any responsibility for managing, nor be the owner of, not have any
            liability for, or in connection with, any asbestos containing
            material.   Both Parties agree to immediately notify the other if
            the Party undertakes any asbestos control or asbestos abatement
            activities that potentially could affect CLEC equipment or
            operations, including, but not limited to, contamination of
            equipment.

            24.4 Within ten (10) business days of CLEC's request for any space
            in Sprint owned or controlled facility, Sprint shall provide any
            information in its possession regarding the known environmental
            conditions of the space provided for placement of equipment and
            interconnection including, but not limited to, the existence and
            condition of known hazardous levels of friable asbestos, lead
            paint, hazardous substance contamination, or hazardous levels of
            radon.   Information is considered in a Party's possession under
            this Agreement if it is in such Party's possession, or the
            possession of a current employee of Sprint's.

            24.5 If the space provided for the placement of equipment,
            interconnection, or provision of service contains known
            environmental contamination or hazardous material, particularly but
            not limited to




<PAGE>   25


            hazardous levels of friable asbestos, lead paint or hazardous
            levels of radon, which makes the placement of such equipment or
            interconnection hazardous, Sprint shall offer an alternative space,
            if available, for CLEC's consideration.   If interconnection is
            complicated by the presence of environmental contamination or
            hazardous materials, and an alternative route is available, Sprint
            shall make such alternative route available for CLEC's
            consideration.   If there is no alternative or CLEC declines same,
            and CLEC occupies the hazardous space, CLEC does so at its own risk
            and shall indemnify Sprint from all liability for damages or injury
            arising from the presence of the environmental contamination or
            hazardous materials.

            24.6 Subject to this Section 24 and to Sprint's standard security
            procedures, which procedures will be provided to CLEC, Sprint shall
            allow CLEC at CLEC's expense to perform any environmental site
            investigations, including, but not limited to, asbestos surveys,
            which CLEC deems to be necessary in support of its collocation
            needs.

SECTION 25. AMENDMENTS AND MODIFICATIONS

            No provision of this Agreement shall be deemed waived, amended or
            modified by either party unless such a waiver, amendment or
            modification is in writing, dated, and signed by both Parties.

SECTION 26. SEVERABILITY

            Subject to Section 2 - Regulatory Approvals, if any part of this
            Agreement is held to be invalid for any reason, such invalidity
            will affect only the portion of this Agreement which is invalid.
            In all other respects this Agreement will stand as if such invalid
            provision had not been a part thereof, and the remainder of the
            Agreement shall remain in full force and effect.

SECTION 27. HEADINGS NOT CONTROLLING

            The headings and numbering of Sections, Parts and Attachments in
            this Agreement are for convenience only and shall not be construed
            to define or limit any of the terms herein or affect the meaning or
            interpretation of this Agreement.

SECTION 28. ENTIRE AGREEMENT

            This Agreement, including all Parts and Attachments and subordinate
            documents attached hereto or referenced herein, all of which are
            hereby




<PAGE>   26


            incorporated by reference herein, constitute the entire matter
            thereof, and supersede all prior oral or written agreements,
            representations, statements, negotiations, understandings,
            proposals, and undertakings with respect to the subject matter
            thereof.

SECTION 29. COUNTERPARTS

            This Agreement may be executed in counterparts.   Each counterpart
            shall be considered an original and such counterparts shall
            together constitute one and the same instrument.

SECTION 30. SUCCESSORS AND ASSIGNS

            This Agreement shall be binding upon, and inure to the benefit of,
            the Parties hereto and their respective successors and permitted
            assigns.

SECTION 31. IMPLEMENTATION PLAN

            31.1 Implementation Team.   This Agreement sets forth the overall
            standards of performance for services, processes, and systems
            capabilities that the Parties will provide to each other, and the
            intervals at which those services, processes and capabilities will
            be provided.   The Parties understand that the arrangements and
            provision of services described in this Agreement shall require
            technical and operational coordination between the Parties.
            Accordingly, the Parties agree to form a team (the "Implementation
            Team") that shall develop and identify those processes, guidelines,
            specifications, standards and additional terms and conditions
            necessary to support the terms of this Agreement.   Within thirty
            (30) days after the Approval Date, each Party shall designate, in
            writing, no more than four (4) persons to be permanent members of
            the Implementation Team; provided that either Party may include in
            meetings or activities such technical specialists or other
            individuals as may be reasonably required to address a specific
            task, matter or subject.   Each Party may replace its
            representatives by delivering written notice thereof to the other
            Party.

            31.2 Implementation Plan.   Within one hundred twenty (120) days
            after the Approval Date, the agreements reached by the
            Implementation Team shall be documented in an operations manual
            (the "Implementation Plan").   The Implementation Plan shall
            address the following matters, and may include any other matters
            agreed upon by the Implementation Team:

                  31.2.1 the respective duties and responsibilities of the
                  Parties with respect to the administration and maintenance of
                  the interconnections (including signaling) specified in
                  Attachment 3




<PAGE>   27


                  and the trunk groups specified in Attachment 4 and, including
                  standards and procedures for notification and discoveries of
                  trunk disconnects;

                  31.2.2 disaster recovery and escalation provisions;

                  31.2.3 access to Operations Support Systems functions
                  provided hereunder, including gateways and interfaces;

                  31.2.4 escalation procedures for ordering, provisioning,
                  billing, and maintenance;

                  31.2.5 single points of contact for ordering, provisioning,
                  billing, and maintenance;

                  31.2.6 service ordering and provisioning procedures,
                  including provision of the trunks and facilities;

                  31.2.7 provisioning and maintenance support;

                  31.2.8 conditioning and provisioning of collocation space and
                  maintenance of Virtually Collocated equipment;

                  31.2.9 procedures and processes for Directories and Directory
                  Listings;

                  31.2.10  billing processes and procedures;

                  31.2.11  network planning components including time intervals;

                  31.2.12  joint systems readiness and operational readiness 
                  plans;

                  31.2.13 appropriate testing of services, equipment,
                  facilities and Network Elements;

                  31.2.14 monitoring of inter-company operational processes;

                  31.2.15 procedures for coordination of local PIC changes and
                  processing;

                  31.2.16 physical and network security concerns; and

                  31.2.17 such other matters specifically referenced in this
                  Agreement that are to be agreed upon by the Implementation
                  Team and/or contained in the Implementation Plan.




<PAGE>   28


            31.3 Action of the Implementation Team.   The Implementation Plan
            may be amended from time to time by the Implementation Team as the
            team deems appropriate.   Unanimous written consent of the
            permanent members of the Implementation Team shall be required for
            any action of the Implementation Team.   If the Implementation Team
            is unable to act, the existing provisions of the Implementation
            Plan shall remain in full force and effect.

     IN WITNESS WHEREOF, each of the Parties has caused this Agreement to be
executed by its duly authorized representatives.

<TABLE>
<S>                                   <C>
DIGITAL TELEPORT INC.                 UNITED TELEPHONE COMPANY OF KANSAS
By:     /s/  J. W. Sheehy             By:      /s/  John L. Roe
Name:   J. W. "Jerry" Sheehy          Name:    John L. Roe
Title:  /s/  Vice Pres IC Support     Title:   Vice Pres. - Carrier & Regulatory
Date:   9/30/97                       Date:    10/1/97
</TABLE>




<PAGE>   29


                         PART B -- DEFINITIONS

"911 SITE ADMINISTRATOR" is a person assigned by CLEC to establish and maintain
E911 service location information for its subscribers.

"911 SERVICE" means a universal telephone number which gives the public direct
access to the Public Safety Answering Point (PSAP).   Basic 911 service
collects 911 calls from one or more local exchange switches that serve a
geographic area.   The calls are then sent to the correct authority designated
to receive such calls.

"ASR" (ACCESS SERVICE REQUEST) means the industry standard forms and supporting
documentation used for ordering Access Services.   The ASR may be used to order
trunking and facilities between CLEC and Sprint for Local Interconnection.

"ACCESS SERVICES" refers to interstate and intrastate switched access and
private line transport services.

"ACT" means the Communications Act of 1934 as amended by the Telecommunications
Act of 1996, Public Law 104-104 of the 104th U.S.  Congress, effective February
8, 1996.

"AFFILIATE" is an entity that directly or indirectly owns or controls, is owned
or controlled by, or is under common ownership or control with, another entity.
In this paragraph, "own" or "control" means to own an equity interest (or
equivalent) of at least 10% with respect to either party, or the right to
control the business decisions, management and policy of another entity.

"APPROVAL DATE" is the date on which Commission approval of the Agreement is
granted.

"GATEWAY" (ALI GATEWAY) is a telephone company computer facility that
interfaces with CLEC's 911 administrative site to receive Automatic Location
Identification (ALI) data from CLEC.   Access to the Gateway will be via a
dial-up modem using a common protocol.

"AMA" means the Automated Message Accounting structure inherent in switch
technology that initially records telecommunication message information.   AMA
format is contained in the Automated Message Accounting document, published by
Bellcore as GR-1100-CORE which defines the industry standard for message
recording.

"ALI" (AUTOMATIC LOCATION IDENTIFICATION) is a feature developed for E911
systems that provides for a visual display of the caller's telephone number,
address and the names of the emergency response agencies that are responsible
for that address.   The Competitive Local Exchange Company will provide ALI
record




<PAGE>   30


information in National Emergency Number Association (NENA)Version #2 format.
The ALI also shows an Interim Number Portability (INP) number if applicable.

"ALI/DMS" (AUTOMATIC LOCATION IDENTIFICATION/DATA MANAGEMENT SYSTEM) means the
emergency service (E911/911) database containing subscriber location
information (including name, address, telephone number, and sometimes special
information from the local service provider) used to determine to which Public
Safety Answering Point (PSAP) to route the call.

"ANI" (AUTOMATIC NUMBER IDENTIFICATION) is a feature that identifies and
displays the number of a telephone line that originates a call.

"ARS" (AUTOMATIC ROUTE SELECTION) means a service feature associated with a
specific grouping of lines that provides for automatic selection of the least
expensive or most appropriate transmission facility for each call based on
criteria programmed into the system.

"BLV/BLI" (BUSY LINE VERIFY/BUSY LINE INTERRUPT) means an operator call in
which the caller inquires as to the busy status of, or requests an interruption
of a call on another subscriber's telephone line.

"BUSINESS DAY(S) means the days of the week excluding Saturdays, Sundays, and
all official Sprint holidays.

"CABS" means the Carrier Access Billing System which is defined in a document
prepared under the direction of the Billing Committee of the OBF.   The Carrier
Access Billing System document is published by Bellcore in Volumes 1, 1A, 2, 3,
3A, 4 and 5 as Special Reports SR-OPT-001868, SR-OPT-0011869, SR-OPT-001871,
SR-OPT-001872, SR-OPT-001873, SR-OPT-001874, and SR-OPT-001875, respectively,
and contains the recommended guidelines for the billing of access and other
connectivity services.   Sprint's carrier access billing system is its Carrier
Access Support System (CASS).   CASS mirrors the requirements of CABS.

"CPN" (CALLING PARTY NUMBER) is a Common Channel Signaling parameter which
refers to the number transmitted through the network identifying the calling
party.

"CENTRAL OFFICE SWITCH" or "CENTRAL OFFICE" means a switching entity within the
public switched network, including but not limited to end office switches and
tandem office switches.   Central office switches may be employed as
combination End Office/Tandem Office Switches (Combination Class 5/Class 4).

"CENTREX" means a Telecommunications Service associated with a specific
grouping of lines that uses central office switching equipment for call routing
to handle direct dialing of calls, and to provide numerous private branch
exchange-like features.




<PAGE>   31


"CHARGE NUMBER" is a CCS parameter which refers to the number transmitted
through the network identifying the billing number of the calling party.

"CLASS" (Bellcore Service Mark) - means service features that utilize the
capability to forward a calling party's number between end offices as part of
call setup.   Features include Automatic Callback, Automatic Recall, Caller ID,
Call Trace, and Distinctive Ringing.

"CLEC" means a Competitive Local Exchange Carrier.

"COLLOCATION" means the right of CLEC to place equipment in the Sprint's
central offices or other Sprint locations.   This equipment may be placed via
either a physical or virtual collocation arrangement.   With physical
collocation, CLEC obtains dedicated space to place and maintain its equipment.
With virtual collocation, Sprint will install and maintain equipment that CLEC
provides to Sprint.

"COMMISSION" means the Kansas Corporation Commission.

"CCS" (COMMON CHANNEL SIGNALING) means a method of digitally transmitting call
set-up and network control data over a digital signaling network fully separate
from the public switched telephone network that carries the actual call.

"CONFIDENTIAL AND/OR PROPRIETARY INFORMATION" has the meaning set forth in
Section 21 of Part A -- General Terms.

"CONTRACT YEAR" means a twelve (12) month period during the term of the
contract commencing on the Approval Date and each anniversary thereof.

"CONTROL OFFICE" is an exchange carrier center or office designated as its
company's single point of contact for the provisioning and maintenance of its
portion of local interconnection arrangements.

"CUSTOM CALLING FEATURES" - means a set of Telecommunications Service features
available to residential and single-line business customers including
call-waiting, call-forwarding and three-party calling.

"CUSTOMER PROPRIETARY NETWORK INFORMATION" ("CPNI") - means (A) information
that relates to the quantity, technical configuration, type, destination, and
amount of use of a Telecommunications Service subscribed to by any customer of
a Telecommunications Carrier, and that is made available to the carrier by the
customer solely by virtue of the carrier customer relationship; and (B)
information contained in the bills pertaining to telephone exchange service or
telephone toll service received by a customer of a carrier.





<PAGE>   32


"DBMS" (DATABASE MANAGEMENT SYSTEM) is a computer process used to store, sort,
manipulate and update the data required to provide selective routing and ALI.

"DIRECTORY ASSISTANCE DATABASE" refers to any subscriber record used by Sprint
in its provision of live or automated operator-assisted directory assistance
including but not limited to 411, 555-1212, NPA-555-1212.

"DIRECTORY ASSISTANCE SERVICES" provides listings to callers.   Directory
Assistance Services may include the option to complete the call at the caller's
direction.

"DISCLOSER" means that party to this Agreement which has disclosed Confidential
Information to the other party.

"E911" (ENHANCED 911 SERVICE) means a telephone communication service which
will automatically route a call dialed "911" to a designated public safety
answering point (PSAP) attendant and will provide to the attendant the calling
party's telephone number and, when possible, the address from which the call is
being placed and the emergency response agencies responsible for the location
from which the call was dialed.

"E911 MESSAGE TRUNK" is a dedicated line, trunk or channel between two central
offices or switching devices which provides a voice and signaling path for E911
calls.

ELECTRONIC INTERFACES - means access to operations support systems consisting
of preordering, ordering, provisioning, maintenance and repair and billing
functions.   For the purposes of this Agreement, Sprint shall provide
Electronic Interfaces in accordance with Exhibit 2.

"EMERGENCY RESPONSE AGENCY" is a governmental entity authorized to respond to
requests from the public to meet emergencies.

"ENVIRONMENTAL HAZARD" means any substance the presence, use, transport,
abandonment or disposal of which (i) requires investigation, remediation,
compensation, fine or penalty under any Applicable Law (including, without
limitation, the Comprehensive Environmental Response Compensation and Liability
Act, Superfund Amendment and Reauthorization Act, Resource Conservation
Recovery Act, the Occupational Safety and Health Act and provisions with
similar purposes in applicable foreign, state and local jurisdictions) or (ii)
poses risks to human health, safety or the environment (including, without
limitation, indoor, outdoor or orbital space environments) and is regulated
under any Applicable Law.

"ESN" (EMERGENCY SERVICE NUMBER) is a number assigned to the ALI and selective
routing databases for all subscriber telephone numbers.   The ESN designates a
unique combination of fire, police and emergency medical service response
agencies that serve the address location of each in-service telephone number.




<PAGE>   33


"EMR" means the Exchange Message Record System for exchanging
telecommunications message information for billable, non-billable, sample,
settlement and study data.   EMR format is contained in BR-010-200-010 CRIS
Exchange Message Record, published by Bellcore and which defines the industry
standard for exchange message records.

"ENHANCED DIRECTORY ASSISTANCE" refers to directory Assistance services,
including but not limited to reverse search, talking yellow pages, and locator
services.

"EIS" (EXPANDED INTERCONNECTION SERVICE) is the collocation arrangement which
Sprint provides in its designated wire centers.

"GRANDFATHERED SERVICE" means service which is no longer available for new
customers and is limited to the current customer at their current locations
with certain provisioning limitations, including but not limited to upgrade
denials, feature adds/changes and responsible/billing party.

"FCC INTERCONNECTION ORDER" is the Federal Communications Commission's First
Report and Order and Second Report and Order in CC Docket No.  96-98 released
August 8, 1996; as subsequently amended or modified by the FCC from time to
time.

"ILEC" means the incumbent local exchange carrier.

"IXC" (INTEREXCHANGE CARRIER) means a provider of interexchange
telecommunications services.

"INP" (INTERIM NUMBER PORTABILITY) is a service arrangement whereby subscribers
who change local service providers may retain existing telephone numbers
without impairment of quality, reliability, or convenience when remaining at
their current location or changing their location within the geographic area
served by the initial carrier's serving central office.   (Notwithstanding the
foregoing, the parties acknowledge that the provision of INP through Remote
Call Forwarding results in a lesser grade of service.)

"IP" (INTERCONNECTION POINT) is a mutually agreed upon point of demarcation
where the networks of Sprint and CLEC interconnect for the exchange of traffic.

"LIDB" (LINE INFORMATION DATA BASE(S)) means a Service Control Point (SCP)
database that provides for such functions as calling card validation for
telephone line number cards issued by Sprint and other entities and validation
for collect and billed-to-third services.

"LOCAL SERVICE REQUEST" means an industry standard form used by the Parties to
add, establish, change or disconnect local services.




<PAGE>   34


"LOCAL TRAFFIC" means traffic (excluding Commercial Mobile Radio Services
traffic, e.g., paging, cellular, PCS) that is originated and terminated within
a given local calling area, or mandatory expanded area service (EAS) area, as
defined by State commissions or, if not defined by state commissions, then as
defined in existing Sprint tariffs.

"MSAG" (MASTER STREET ADDRESS GUIDE (MSAG)) is a database defining the
geographic area of an E911 service.   It includes an alphabetical list of the
street names, high-low house number ranges, community names, and emergency
service numbers provided by the counties or their agents to Sprint.

"CLEC 911 DATABASE RECORDS" are the CLEC subscriber records to be provided by
CLEC to Sprint for inclusion in Sprint's E911 database.

"MECAB" refers to the Multiple Exchange Carrier Access Billing (MECAB) document
prepared by the Billing Committee of the Ordering and Billing Forum (OBF),
which functions under the auspices of the Carrier Liaison Committee (CLC) of
the Alliance for Telecommunications Industry Solutions (ATIS).   The MECAB
document, published by Bellcore as Special Report SR-BDS-000983, contains the
recommended guidelines for the billing of an access service provided by two or
more LECs (including a LEC and a CLEC), or by one LEC in two or more states
within a single LATA.

"MECOD" refers to the Multiple Exchange Carriers Ordering and Design (MECOD)
Guidelines for Access Services - Industry Support Interface, a document
developed by the Ordering/Provisioning Committee under the auspices of the
Ordering and Billing Forum (OBF), which functions under the auspices of the
Carrier Liaison Committee (CLC) of the Alliance for Telecommunications Industry
Solutions (ATIS).   The MECOD document, published by Bellcore as Special Report
SR STS-002643, establishes recommended guidelines for processing orders for
access service which is to be provided by two or more LECs (including a LEC and
a CLEC).

"NANP" means the "North American Numbering Plan," the system or method of
telephone numbering employed in the United States, Canada, and certain
Caribbean countries.   It denotes the three digit Numbering Plan Area code and
a seven digit telephone number made up of a three digit Central Office code
plus a four digit station number.

"NENA" (NATIONAL EMERGENCY NUMBER ASSOCIATION (NENA)) is an association with a
mission to foster the technological advancement, availability and
implementation of 911 nationwide.

"NETWORK ELEMENT" means a facility or equipment used in the provision of a
Telecommunications Service.   Such term also includes features, functions, and
capabilities that are provided by means of such facility or equipment,
including subscriber numbers, databases, signaling systems, and information
sufficient for billing




<PAGE>   35


and collection or used in the transmission, routing, or other provision of a
Telecommunications Service.

"NP" (NUMBER PORTABILITY) means the ability of users of Telecommunications
Services to retain, at the same location, existing telecommunications numbers
without impairment of quality, reliability, or convenience when switching from
one telecommunications carrier to another.   .

"NPA" (NUMBERING PLAN AREA) (sometimes referred to as an area code) is the
three digit indicator which is designated by the first three digits of each
10-digit telephone number within the NANP.   Each NPA contains 800 possible NXX
Codes.   There are two general categories of NPA, "eographic NPAs" and
"Non-Geographic NPAs."  A "Geographic NPA" is associated with a defined
geographic area, and all telephone numbers bearing such NPA are associated with
services provided within that Geographic area.   A "Non-Geographic NPA," also
known as a "Service Access Code (SAC Code)" is typically associated with a
specialized telecommunications service which may be provided across multiple
geographic NPA areas; 500, 800, 900, 700, and 888 are examples of
Non-Geographic NPAs.

"NXX," "NXX CODE," OR "CENTRAL OFFICE CODE," OR "CO CODE" is the three digit
switch entity indicator which is defined by the fourth, fifth and sixth digits
of a 10 digit telephone number within the North America Numbering Plan
("NANP").

"OBF" means the Ordering and Billing Forum, which functions under the auspices
of the Carrier Liaison Committee (CLC) of the Alliance for Telecommunications
Industry Solutions (ATIS)

"OBSOLETE SERVICE" means a service that is outmoded/outdated but yet has
current subscribers to the services.   Such service is no longer available for
new customers and with existing customers there is no assurance of the service
continuing to function.   Any technical or feature change to the customer's
service will eliminate such service at the time of request.

"OPERATOR SYSTEMS" is the Network Element that provides operator and automated
call handling with billing, special services, subscriber telephone listings,
and optional call completion services.

"OPERATOR SERVICES" provides (1) operator handling for call completion (e.g.
collect calls); (2) operator or automated assistance for billing after the
subscriber has dialed the called number (e.g.  credit card calls); and (3)
special services (e.g.  BLV/BLVI, Emergency Agency Call).

"PARITY" means, subject to the availability, development and implementation of
necessary industry standard Electronic Interfaces, the provision by Sprint of
services, Network Elements, functionality or telephone numbering resources
under this




<PAGE>   36


Agreement to CLEC on terms and conditions, including provisioning and repair
intervals, no less favorable that those offered to Sprint, its Affiliates or
any other entity that obtains such services, Network Elements, functionality or
telephone numbering resources.   Until the implementation of necessary
Electronic Interfaces, Sprint shall provide such services, Network Elements,
functionality or telephone numbering resources on a non-discriminatory basis to
CLEC as it provides to its Affiliates or any other entity that obtains such
services, Network Elements, functionality or telephone numbering resources.

"Parties" means, jointly, DTI and Sprint, and no other entity, affiliate,
subsidiary or assign.

"PARTY" means either DTI or Sprint, and no other entity, affiliate, subsidiary
or assign.

"P.01 TRANSMISSION GRADE OF SERVICE (GOS)" means a trunk facility provisioning
standard with the statistical probability of no more than one call in 100
blocked on initial attempt during the average busy hour.

"PLU" (PERCENT LOCAL USAGE) is a calculation which represents the ratio of the
local minutes to the sum of local and intraLATA toll minutes between exchange
carriers sent over Local Interconnection Trunks.   Directory assistance,
BLV/BLVI, 900, 976, transiting calls from other exchange carriers and switched
access calls are not included in the calculation of PLU.

"POP" means an IXC's point of presence.

"PROPRIETARY INFORMATION" shall have the same meaning as Confidential
Information.

"PSAP" (PUBLIC SAFETY ANSWERING POINT (PSAP)) is the public safety
communications center where 911 calls placed by the public for a specific
geographic area will be answered.

"RATE CENTER" means the geographic point and corresponding geographic area
which are associated with one or more particular NPA-NXX codes which have been
assigned to Sprint (or CLEC) for its provision of Basic Exchange
Telecommunications Services.   The "rate center point" is the finite geographic
point identified by a specific V&H coordinate, which is used to measure
distance-sensitive end user traffic to/from the particular NPA-NXX designations
associated with the specific Rate Center.   The "rate center area" is the
exclusive geographic area identified as the area within which Sprint (or CLEC)
will provide Basic Exchange Telecommunications Services bearing the particular
NPA-NXX designations associated with the specific Rate Center.   The Rate
Center point must be located within the Rate Center area.




<PAGE>   37


"REAL TIME" means the actual time in which an event takes place, with the
reporting on or the recording of the event simultaneous with its occurrence.

"RECIPIENT" means that party to this Agreement (a) to which Confidential
Information has been disclosed by the other party or (b) who has obtained
Confidential Information in the course of providing services under this
Agreement.

"RESELLER" is a category of Local Exchange service providers who obtain dial
tone and associated Telecommunications Services from another provider for
resale to their end user subscribers.

"ROW" (RIGHT OF WAY (ROW)) has the meaning set forth in Section 2.13 of
Attachment VI of this Agreement.

"ROUTING POINT" means a location which Sprint or CLEC has designated on its own
network as the homing (routing) point for traffic inbound to Basic Exchange
Services provided by Sprint or CLEC which bear a certain NPA-NXX designation.
The Routing Point is employed to calculate mileage measurements for the
distance-sensitive transport element charges of Switched Access Services.
Pursuant to Bellcore Practice BR 795-100-100, the Routing Point may be an "End
Office" location, or a "LEC Consortium Point of Interconnection."  Pursuant to
that same Bellcore Practice, examples of the latter shall be designated by a
common language location identifier (CLLI) code with (x)KD in positions 9, 10,
11, where (x) may by any alphanumeric A-Z or 0-9.   The above referenced
Bellcore document refers to the Routing Point as the Rating Point.   The Rating
Point/Routing Point need not be the same as the Rate Center Point, nor must it
be located within the Rate Center Area, but must be in the same LATA as the
NPA-NXX.

"SECAB" means the Small Exchange Carrier Access Billing document prepared by
the Billing Committee of the OBF.   The Small Exchange Carrier Access Billing
document, published by Bellcore as Special Report SR OPT-001856, contains the
recommended guidelines for the billing of access and other connectivity
services.

"SELECTIVE ROUTING" is a service which automatically routes an E911 call to the
PSAP that has jurisdictional responsibility for the service address of the
telephone that dialed 911, irrespective of telephone company exchange or wire
center boundaries.

"SIGNALING TRANSFER POINT" or "STP" means a signaling point that performs
message routing functions and provides information for the routing of messages
between signaling points within or between CCIS networks.   An STP transmits,
receives and processes CCIS messages.

"SWITCH" means a Central Office Switch as defined in this Part B.




<PAGE>   38


"SWITCHED ACCESS DETAIL USAGE DATA" means a category 1101XX record as defined
in the EMR Bellcore Practice BR 010-200-010.

"SWITCHED EXCHANGE ACCESS SERVICE" means the offering of transmission or
switching services to Telecommunications Carriers for the purpose of the
origination or termination of Telephone Toll Service.   Switched Exchange
Access Services include:   Feature Group A, Feature Group B, Feature Group D,
800/888 access and 900 access and their successor or similar Switched Exchange
Access Services.

"SYNCHRONOUS OPTICAL NETWORK" or "SONET" is an optical interface standard that
allows interworking of transmission products from multiple vendors (i.e.
mid-span meets).   The base rate is 51.84 MHps (OC-1/STS-1 and higher rates are
direct multiples of the base rate up to 1.22 GHps.

"TANDEM OFFICE SWITCHES" which are Class 4 switches which are used to connect
and switch trunk circuits between and among end office switches and other
tandems.

"TECHNICALLY FEASIBLE" refers solely to technical or operational concerns,
rather than economic, space, or site considerations.

"TELECOMMUNICATIONS" means the transmission, between or among points specified
by the user, of information of the user's choosing, without change in the form
or content of the information as sent and received.

"TELECOMMUNICATION SERVICES" means the offering of Telecommunications for a fee
directly to the public, or to such classes of users as to be effectively
available directly to the public, regardless of the facilities used.

"THOUSANDS BLOCK OF NUMBERS" shall mean 1000 or more consecutive numbers
beginning and ending on a digit boundary, e.g., 949-1000 to 949-1999.

"TRCO" means Trouble Reporting Control Office.

"VOLUNTARY FEDERAL SUBSCRIBER FINANCIAL ASSISTANCE PROGRAMS" are government
programs that subsidize the provision of Telecommunications Services to
low-income subscribers, pursuant to requirements established by the appropriate
state regulatory body.

"WIRE CENTER" denotes a building or space within a building which serves as an
aggregation point on a given carrier's network, where transmission facilities
and circuits are connected or switched.   Wire center can also denote a
building in which one or more central offices, used for the provision of Basic
Exchange Services and access services, are located.   However, for purposes of
EIC service, Wire Center shall mean those points eligible for such connections
as specified in the FCC Docket No.  91-141, and rules adopted pursuant thereto.



<PAGE>   39


                         PART C - ATTACHMENT I

                             PRICE SCHEDULE

1. GENERAL PRINCIPLES

      1.1 Subject to the provisions of Sections 2 and 12 of Part A of this
      Agreement, all rates provided under this Agreement shall remain in effect
      for the term of this Agreement.

2. LOCAL SERVICE RESALE

      The rates that CLEC shall pay to Sprint for Local Resale are as set forth
      in Table 1 of this Attachment and shall be applied consistent with the
      provisions of Attachment II of this Agreement .

3. INTERCONNECTION AND RECIPROCAL COMPENSATION

      3.1 The rates to be charged for the exchange of Local Traffic are set
      forth in Table 1 of this Attachment and shall be applied consistent with
      the provisions of Attachment IV of this Agreement.

      3.2 Compensation for the termination of toll traffic and the origination
      of 800 traffic between the interconnecting parties shall be based on the
      applicable access charges in accordance with FCC and Commission Rules and
      Regulations and consistent with the provisions of Attachment IV of this
      Agreement.

      3.3 Where a toll call is completed through Sprint's INP arrangement
      (e.g., remote call forwarding, flexible DID, etc.) to a CLEC's
      subscriber, CLEC shall be entitled to applicable access charges in
      accordance with the FCC and Commission Rules and Regulations.   If a
      national standard billing method has not been developed for a CLEC to
      directly bill a carrier access for a toll call that has been completed
      using interim number portability, then a blended rate method will be
      used.

            3.3.1 The Parties will jointly determine the amount of traffic that
            will be considered INP'ed traffic for compensation purposes.   The
            ported party shall charge the porting party for each minute of INP
            traffic at the INP blended rate specified in section 3.3.2, in lieu
            of any other compensation charges for terminating such traffic.
            The traffic that is not identified as INP'ed will be compensated as
            local interconnection as set forth in section 3.1.




<PAGE>   40


            3.3.2 For compensation of the INP traffic, the Parties shall
            jointly develop a process which will allow compensation for INP'ed
            traffic to be based on the initial origination point and final
            terminated point of the INP'ed call.   The full reciprocal
            compensation rate, as listed in the Pricing Schedule, shall apply
            for local traffic, and full switched access charges, as listed in
            applicable tariffs, shall apply for intraLATA and interLATA.   All
            three sets of rates will be weighted together based on the agreed
            minutes of use patterns to establish a single set of blended rates
            for all INP'ed traffic.

      3.4 CLEC shall pay a transit rate, comprised of the transport and tandem
      rate elements, as set forth in Table 1 of this Attachment when CLEC uses
      a Sprint access tandem to terminate a local call to a third party LEC or
      another CLEC.   Sprint shall pay CLEC a transit rate equal to the Sprint
      rate referenced above when Sprint uses a CLEC switch to terminate a local
      call to a third party LEC or another CLEC.

4. UNBUNDLED NETWORK ELEMENTS

      The charges that CLEC shall pay to Sprint for Unbundled Network Elements
      are set forth in Table 1 of this Attachment I.




<PAGE>   41


               NETWORK ELEMENT PRICE LIST - SPRINT KANSAS

<TABLE>
<CAPTION>
          RATE ELEMENT                         SOURCE             RECURRING RATE         NRC
<S>                                         <C>                       <C>               <C>
                                            TELRIC COST STUDY
Service Order NRC                                                                       $25.15
Service Order Listing Only                                                              $20.82
Central Office Interconnection Charge                                                   $10.25
Trip charge                                                                             $16.61
Outside Plant Interconnection (2-W)                                                     $47.14
Outside Plant Interconnection (4-W)                                                     $53.87
NID Installation Charge                                                                 $26.94
NID Connection Charge                                                                   $13.47
Testing                                                                                  $1.41
Loop Rework Charge (2-W)                                                                $33.27
Loop Rework Charge (4-W)                                                                $53.85
Trouble Isolation and Testing                                                           $66.46
NID                                         TELRIC COST STUDY
1 Line                                                                $0.77
2 Line                                                                $1.11
Smartjack                                                             $14.30
LOOP                                        TELRIC COST STUDY
Analog 2-wire Band 1                                                  $27.71
                                 Band 2                               $38.37
                                 Band 3                               $50.32
                                 Band 4                               $62.23
                                 Band 5                               $97.28
Analog 4-wire
                                 Band 1                               $46.55
                                 Band 2                               $64.47
                                 Band 3                               $84.54
                                 Band 4                               $104.55
                                 Band 5                               $163.44
                         Digital 2-wire                                 ICB
                         Digital 4-wire                                 ICB
                                   ISDN                                 ICB
                                    DS1                                 ICB
                                   HDSL                                 ICB
Local Switching                             TELRIC COST STUDY
                                 Band 1                               $7.06
                                 Band 2                               $10.89
                                 Band 3                               $15.33
                                   ISDN                                 ICB
                                CENTREX                                 ICB
                                    PBX                                 ICB
                                    DS1                                 ICB
                   Intrastate CCL Orig*     Interstate Access Tariff  Current tariff rate
                   Intrastate CCL Term*                               Current tariff rate
                                   RIC*                               Current tariff rate
LOOP & PORT COMB.  Discount                 TELRIC COST STUDY
(1 Line NID, 2 Wire Loop, & Basic Port)                               $1.68
FEATURES                                    TELRIC COST STUDY
</TABLE>




<PAGE>   42


                   NETWORK ELEMENT PRICE LIST - SPRINT KANSAS

<TABLE>
<CAPTION>
             RATE ELEMENT                        SOURCE               RECURRING RATE       NRC
<S>                                        <C>                           <C>               <C>
CCF Package*                                                              $0.49            $2.49
CLASS Package*                                                            $10.60           $4.38
CENTREX Package*                                                          $13.65           $26.87
    - 3 Way Conf/Consult/Hold Transfer                                    $2.09            $15.33
- - Conf Calling - 6 Way Station Control                                    $3.07            $22.99
    - Dial Transfer to Tandem Tie Line                                    $0.11            $77.52
                      - Direct Connect                                    $0.02            $17.78
                  - Meet Me Conference                                    $20.86           $29.95
                  - Multi-Hunt Service                                    $0.06            $19.93
INTERIM NUMBER PORTABILITY                 TELRIC COST STUDY
RCF Residential                                                           $0.04            $0.96
RCF Business                                                              $0.21            $0.96
Call Path Residential                                                     $0.01            $0.31
Call Path Business                                                        $0.04            $0.31
TANDEM SWITCHING                           TELRIC COST STUDY
                                                                          $0.003897        $88.21
TRANSPORT                                  Interstate Access Tariff
                                  DS 1                                    Rates varies     $180.77
                                  DS 3                                    Rates varies     $206.93
                                Common                                    $0.002446        N/A
RECIPROCAL COMPENSATION                    TELRIC COST STUDY
End Office                                                                $0.009705        $88.21
Tandem Switching                                                          $0.003897        $88.21
Transport
                                  DS 1                                    Rates varies     $180.77
                                  DS 3                                    Rates varies     $206.93
                                Common                                    $0.002446        N/A
INTERCONNECTION                            TELRIC COST STUDY
CROSS CONNECTION
DS0 Elec X-Conn                                                           ICB              N/A
DS1 Elec X-Conn                                                           ICB              N/A
DS3 Elec X-Conn                                                           ICB              N/A
</TABLE>




<PAGE>   43


                   NETWORK ELEMENT PRICE LIST - SPRINT KANSAS

<TABLE>
<CAPTION>
                       RATE ELEMENT                               SOURCE           RECURRING RATE       NRC
<S>                                                      <C>                         <C>                <C>
COMMON CHANNELL SIGNALING
INTERCONNECTION SERVICE
                                            STP Port     TELRIC COST STUDY           See Page 4         See Page 4
                                       STP Switching     TELRIC COST STUDY           See Page 4         See Page 4
                       56.0 Kpbs Channel Termination     Interstate Access Tariff    See Page 4         See Page 4
                            56.0 Kbps SS7 Link Fixed     Interstate Access Tariff    See Page 4         See page 4
                         56.0 Kbps SS7 Line Per Mile     Interstate Access Tariff    See Page 4         See Page 4
                       1.544 MBS Channel Termination     Interstate Access Tariff    See Page 4         See Page 4
                           1.544 MBPS SS7 Link Fixed     Interstate Access Tariff    See Page 4         See Page 4
                        1.544 MBPS SS7 Link Per Mile     Interstate Access Tariff    See Page 4         See Page 4
                             Multiplexing DS1 to DS0     TELRIC COST STUDY           See Page 4         See Page 4
LINE INFORMATION DATABASE
                         LIDB Administration Service     TELRIC COST STUDY           $0.055             N/A
                   LIDB Database Transport per query     Interstate Access Tariff    $0.0016            N/A
                             LIDB Database per query     Interstate Access Tariff    $0.0366            N/A
                 Toll Free Code Access Service query     Interstate Access Tariff    $0.007520          N/A
              Toll Free Code Optional Service query     Interstate Access Tariff    $0.001255          N/A
DIRECTORY ASSISTANCE SERVICES
     DA Database Listing & Update per listing/update     TELRIC COST STUDY           $0.07              N/A
                DA Data Base Query Service per query     TELRIC COST STUDY           $0.0968            N/A
TOLL & LOCAL OPERATOR SERVICES                           TELRIC COST STUDY
Toll and Local Assistance Service (Live) per attempt                                 $0.5230            N/A
DA OPERATOR SERVICE                                      TELRIC COST STUDY
              DA Operator Service (Live) per attempt                                 $0.310             N/A
911 TANDEM PORT                                          TELRIC COST STUDY
                             Per DSO Equivalent Port                                 $21.60             $114.15
OPERATIONAL SUPPORT SYSTEMS
                                     OSS Interfaces*                                 ICB                ICB
* Sprint is working on OSS and rates will be added
as they are developed.
</TABLE>




<PAGE>   44


                   NETWORK ELEMENT PRICE LIST - SPRINT KANSAS

<TABLE>
RATE ELEMENT        SOURCE        RECURRING RATE       NRC
STP INTERCONNECTON
STP interconnection (in pairs) can be obtained at any of the
following locations.   Associated recurring and non-recurring
rates are based on the applicable state charges.
                                   Operating Point
    State       Exchange                Code         CLLI Code
<S>             <C>                  <C>            <C>
Florida         Tallahassee          230-010-000    THLSFLXA21W
                Tallahassee          230-011-000    THLSFLXB21W
                Winter Park          239-111-000    WNPKFLXA11W
                Altamonte Springs    239-211-000    ALSPFLXA21W
Tennessee       Bristol              239-004-000    BRSTTNXA21W
                Johnson City         239-002-000    JHCYTNXC21W
Minnesota       Osseo                239-151-000    OSSEMNXO21W
                Chaska               239-152-000    CHSKMNXC21W
Missouri        Warrensburg          239-162-000    WRBGMOXA21W
                Jefferson City       239-161-000    JFCYMOXA21W
New Jersey      Clinton              239-203-000    CLTNNJXJ77W
                Newton               239-202-000    NWTNNJXU77W
Nevada          Las Vegas            230-001-000    LSVGNVXB00W
                Las Vegas            230-002-000    LSVGNVXG00W
North Carolina  Rocky Mount          239-200-000    RCMTNCXA01W
                Fayettville          239-201-000    FYVLNCXA01W
Ohio            Mansfield            239-204-000    MNFDOHXA24W
                Lima                 239-205-000    LIMAOHXA25W
Pennsylvania    Chambersburg         239-207-000    CHBGPAXC77W
                Carlisle             239-206-000    CRLSPAXC77W
Texas           Athens               239-141-000    ATHNTXXA21W
                Humble               239-142-000    HMBLTXXA21W
</TABLE>

OPERATOR & DIRECTORY ASSISTANCE
Operator and Directory Assistance can be obtained from any of
the four Sprint regional centers.   The recurring and
non-recurring rates are based on the regional centers which
are located in:

                           Las Vegas, Nevada
                            Mansfield, Ohio
                      Rocky Mount, North Carolina
                          Winter Park, Florida




<PAGE>   45


                         PART C - ATTACHMENT II

                              LOCAL RESALE

SECTION 1. TELECOMMUNICATIONS SERVICES PROVIDED FOR RESALE

            1.1 At the request of CLEC, and pursuant to the requirements of the
            Act, and FCC and Commission Rules and Regulations, Sprint shall
            make available to CLEC for resale Telecommunications Services that
            Sprint currently provides or may provide hereafter at retail to
            subscribers who are not telecommunications carriers.   Such resale
            may be as allowed by the FCC and Commission.   The
            Telecommunications Services provided by Sprint to CLEC pursuant to
            this Attachment II are collectively referred to as "Local Resale."

            1.2 To the extent that this Attachment describes services which
            Sprint shall make available to CLEC for resale pursuant to this
            Agreement, this list of services is neither all inclusive nor
            exclusive.

SECTION 2. GENERAL TERMS AND CONDITIONS

            2.1 PRICING.   The prices charged to CLEC for Local Resale are set
            forth in Attachment I of this Agreement.

            2.2  REQUIREMENTS FOR SPECIFIC SERVICES
                        2.2.1              CENTREX REQUIREMENTS

                        2.2.1.1 At CLEC's option, CLEC may purchase the entire
                        set of CENTREX features or a subset of any one such
                        feature.   The CENTREX Service provided for resale will
                        meet the requirements of this Subsection 2.3.1.

                        2.2.1.2 All features and functions of CENTREX Service,
                        including CENTREX Management System (CMS), whether
                        offered under tariff or otherwise, shall be available
                        to CLEC for resale.

                        2.2.1.3 Sprint shall make information required for an
                        "as is" transfer of CENTREX subscriber service,
                        features, functionalities and CMS capabilities
                        available to CLEC.




<PAGE>   46


                        2.2.1.4 All service levels and features of CENTREX
                        Service provided by Sprint for resale by CLEC shall be
                        at parity with the service levels and features of
                        CENTREX Service Sprint provides its subscribers.

                        2.2.1.5 Consistent with Sprint's tariffs, CLEC may
                        aggregate the CENTREX local exchange, and IntraLATA
                        traffic usage of CLEC subscribers to qualify for volume
                        discounts on the basis of such aggregated usage.

                        2.2.1.6 CLEC may request that Sprint suppress the need
                        for CLEC subscribers to dial "9" when placing calls
                        outside the CENTREX System.   Should CLEC request this
                        capability for its subscriber, the subscriber will not
                        be able to use 4 digit dialing.

                        2.2.1.7 CLEC may resell call forwarding in conjunction
                        with CENTREX Service.

                        2.2.1.8 CLEC may purchase any CENTREX Service for
                        resale subject to the minimum number of lines required
                        by Sprint's tariff to qualify for CENTREX Service, but
                        otherwise without restriction on the maximum number of
                        lines that may be purchased for such service.

                        2.2.1.9 Sprint shall make available to CLEC for resale
                        intercom calling within the same CENTREX system.   To
                        the extent that Sprint offers its own subscribers
                        intercom calling between different CENTREX systems,
                        Sprint shall make such capability available to CLEC for
                        resale..

                        2.2.1.10 CLEC may resell Automatic Route Selection
                        ("ARS").   CLEC may aggregate multiple CLEC subscribers
                        on dedicated access facilities where such aggregation
                        is allowed by law, rule or regulation.

                  2.2.2 VOLUNTARY FEDERAL AND STATE
                       SUBSCRIBER FINANCIAL ASSISTANCE PROGRAMS

                  Subsidized local Telecommunications Services are provided to
                  low-income subscribers pursuant to requirements established
                  by the appropriate state regulatory body, and include
                  programs such as Voluntary Federal Subscriber Financial
                  Assistance Program and Link-Up America.   Voluntary Federal
                  and State Subscriber Financial Assistance Programs are not
                  Telecommunications




<PAGE>   47


                  Services that are available for resale under this Agreement.
                  However, when a Sprint subscriber who is eligible for such a
                  federal program or other similar state program chooses to
                  obtain Local Resale from CLEC and CLEC serves such subscriber
                  via Local Resale, Sprint shall identify such subscriber's
                  eligibility to participate in such programs to CLEC in
                  accordance with the procedures set forth herein.

                  2.2.3 GRANDFATHERED SERVICES.   Sprint shall offer for resale
                  to CLEC all Grandfathered Services solely for the existing
                  grandfathered base.   Sprint shall make reasonable efforts to
                  provide CLEC with advance copy of any request for the
                  termination of service and/or grandfathering to be filed by
                  Sprint with the Commission.

                  2.2.4 N11 SERVICE

                        2.2.4.1 Sprint agrees not to offer any new N11
                        Telecommunications Services after the Approval Date of
                        this Agreement unless Sprint makes any such service
                        available for resale.

                        2.2.4.2 CLEC shall have the right to resell any N11
                        Telecommunications Service, including but not limited
                        to 411 or 611 services, existing as of the Approval
                        Date.   Where technically feasible, these services
                        shall be unbranded and routed to CLEC, as required by
                        CLEC pursuant to Part A, Section 12.

                  2.2.5 CONTRACT SERVICE ARRANGEMENTS, SPECIAL ARRANGEMENTS,
                  AND PROMOTIONS.   Sprint shall offer for resale all of its
                  Telecommunications Services available at retail to
                  subscribers who are not Telecommunications Carriers,
                  including but not limited to Contract Service Arrangements
                  (or ICB), Special Arrangements (or ICB), and Promotions in
                  excess of ninety (90) days, all in accordance with FCC and
                  Commission Rules and Regulations.

                  2.2.6 COCOT LINES

                        2.2.6.1 COCOT lines will not be resold at wholesale
                        prices under this Agreement.




<PAGE>   48


                  2.2.7 VOICE MAIL SERVICE

                  Voice Mail Service is not a Telecommunications Service
                  available for resale under this Agreement.   However, where
                  available, Sprint shall make available for Local Resale the
                  SMDI-E (Station Message Desk Interface-Enhanced), or SMDI,
                  Station Message Desk Interface where SMDI-E is not available,
                  feature capability allowing for Voice Mail Services.   Sprint
                  shall make available the MWI (Message Waiting Indicator)
                  stutter dial tone and message waiting light feature
                  capabilities.   Sprint shall make available CFB/DA (Call
                  Forward on Busy/Don't Answer), CF/B (Call Forward on Busy),
                  and CF/DA (Call Forward Don't Answer) feature capabilities
                  allowing for Voice Mail services.

                  2.2.8 HOSPITALITY SERVICE

                  Sprint shall provide all blocking, screening, and all other
                  applicable functions available for hospitality lines under
                  tariff.

                  2.2.9 TELEPHONE LINE NUMBER CALLING CARDS.

                  Sprint shall maintain customer information for CLEC customers
                  who subscribe to resold Sprint local service dial tone lines,
                  in Sprint's LIDB in the same manner that it maintains
                  information in LIDB for its own similarly situated end-user
                  subscribers.   Sprint shall update and maintain, on the same
                  schedule that it uses for its own similarly situated end-user
                  subscribers, the CLEC information in LIDB.

                  Until such time as Sprint's LIDB has the software capability
                  to recognize a resold number as CLEC's, Sprint shall store
                  the resold number in its LIDB at no charge and shall retain
                  revenue for LIDB look-ups to the resold number.   At such
                  time as Sprint's LIDB has the software capability to
                  recognize that the resold number is CLEC's then, if CLEC
                  desires to store resold numbers on Sprint's LIDB, the parties
                  shall negotiate a separate LIDB database storage and look-up
                  agreement.




<PAGE>   49


                        PART C - ATTACHMENT III

                            NETWORK ELEMENTS

SECTION 1. GENERAL

            Pursuant to the following terms, Sprint will unbundle and
            separately price and offer Unbundled Network Elements such that
            CLEC will be able to subscribe to and interconnect to whichever of
            these unbundled elements CLEC requires for the purpose of providing
            local telephone service to its end-users.   It is CLEC's obligation
            to combine Sprint-provided elements with any facilities and
            services that CLEC may itself provide.

SECTION 2. UNBUNDLED NETWORK ELEMENTS

            2.1 Sprint shall offer Network Elements to CLEC for the purpose of
            offering Telecommunication Services to CLEC subscribers.   Sprint
            shall offer Network Elements to CLEC on an unbundled basis on
            rates, terms and conditions that are just, reasonable, and
            non-discriminatory in accordance with the terms and conditions of
            this Agreement.   The initial set of Network Elements include:

                  1) Local Loop
                  2) Network Interface Device (NID)
                  3) Switching Capability

                     --    Local Switching
                     --    Tandem Switching

                  4) Interoffice Transmission Facilities

                     --    Dedicated
                     --    Common

                  5) Signaling Networks & Call Related Databases
                  6) Operations Support Systems
                  7) Operator Services & Directory Assistance

            2.2 CLEC may use one or more Network Elements to provide any
            feature, function, capability, or service option that such Network
            Element(s) is technically capable of providing.

            2.3 Standards for Network Elements

                  2.3.1 Each Network Element provided by Sprint to CLEC shall
                  be at parity with the quality of design, performance,
                  features, functions, capabilities and other characteristics,
                  including but not limited to levels and types of redundant
                  equipment and facilities for




<PAGE>   50


                  power, diversity and security, that Sprint provides to
                  itself, Sprint's own subscribers, to a Sprint Affiliate or to
                  any other entity.

Section 3.  Loop
                  3.1   Definition

                  3.1.1. A "Loop" is a transmission path between the main
                  distribution frame [cross-connect], or its equivalent, in a
                  Sprint Central Office or wire center, and up to the Network
                  Interface Device at a customer's premises, to which CLEC is
                  granted exclusive use.   This includes, but is not limited
                  to, two-wire and four-wire cooper analog voice-grade loops,
                  two-wire and four-wire loops that are conditioned to transmit
                  the digital signals needed to provide services such as ISDN
                  and DS1-level signals.   This also includes DS-3, OC-n and
                  STS-n services (e.g., n = 1,3,12...).   Sprint will also
                  provide conditioned loops (e.g., ADSL, HDSL) for
                  Telecommunications Services requiring loop unfettered by any
                  intervening equipment (e.g., filters, load coils, range
                  extenders) so that CLEC can use these loops for a variety of
                  Telecommunications Services that can be supported by use of
                  copper by attaching appropriate terminal equipment at the
                  ends.

            3.2. Digital Loops

                  3.2.1. Sprint will provide loops conditioned for ADSL and
                  HDSL without electronic terminal equipment at the ends unless
                  otherwise specified by CLEC.   If Sprint does not have
                  available the facilities requested by CLEC or if the service
                  requested exceeds the spectrum compatibility of the
                  transmission path, then CLEC will issue a bona fide request
                  to Sprint for the appropriate facilities.

                  3.2.2. Sprint requires CLEC to provide in writing the grade
                  of service desired in a particular loop (e.g., ISDN-BRI, PRI,
                  ADSL, HDSL, DS1, etc.) so that the loop may be engineered to
                  meet the appropriate spectrum compatibility requirements.
                  If CLEC requires a change in the grade of service of a
                  particular loop, e.g.  changing from ISDN service to ADSL,
                  CLEC shall notify Sprint in writing of the requested change
                  in grade of service.   If Sprint finds that it is not
                  technically feasible to provide the new level of service to
                  CLEC, Sprint will notify CLEC that it is unable to meet
                  CLEC's request.  If a particular grade of service is
                  installed




<PAGE>   51


                  but CLEC uses the loop to provide a service that exceeds the
                  engineered capacity of a medium (i.e., interferes with other
                  services) a mutually agreed upon process will be developed to
                  resolve the issue.

                  3.2.3. If Sprint uses Integrated Digital Loop Carrier or
                  other similar remote concentration devices, Sprint will make
                  alternative arrangements at CLEC's request, to provide an
                  unbundled local loop.   Alternative arrangements may include
                  copper facilities, dedicated transmission equipment or the
                  deployment of newer devices providing for multiple hosting.
                  The cost of modifications will be recovered from the
                  requesting CLEC.

                  3.2.4. Reverse ADSL Loops - all ADSL ATU-C units in Sprint's
                  network, including those integrated into DSLAMs, should
                  either reside within a Sprint host or remote central office.
                  If an ADSL copper loop should start at an outside location,
                  and looped through a host or remote, and then onto the
                  customer, the copper plant from the outside location to the
                  Sprint central office must be a facility dedicated to ADSL
                  transmission only and not part of Sprint's regular feeder or
                  distribution plant.

            3.3. CLEC shall meet the power spectral density requirement given
            in the respective technical references listed below:

                  3.3.1 For Basic Rate ISDN:   Bellcore TR-NWT-000393 Generic
                  Requirements for ISDN Basic Access Digital Subscriber Lines.

                  3.3.2 For HDSL installations:  Bellcore TA-NWT-001210 Generic
                  Requirements for High-Bit-Rate Digital Subscriber Lines.
                  Some fractional T1 derived products operating at 768 kbps may
                  use the same standard.

                  3.3.3. For ADSL:   ANSI T1.413-1995 (Issue 1) Asymmetrical
                  Digital Subscriber Line (ADSL) Metallic Interface.   Note:
                  Issue 2 of the standard will be balloted soon.   It will drop
                  a option that was in Issue 1 called Power Boost.  Sprint does
                  not permit the Power Boost option used in its local network.

                  3.3.4.   As an alternative to Sections 3.3.1, .3.3.2.   and
                  3.3.3, CLEC may meet the requirements given in ANSI document
                  T1E1.4/97-180R1, "Normative Text for Spectral Compatibility
                  Evaluations" dated June 30, 1997.




<PAGE>   52



SECTION 4.  LOCAL SWITCHING
         4.1      Definition:

                  4.1.1 Local Switching is the Network Element that provides
                  the functionality required to connect the appropriate lines
                  or trunks wired to the Main Distributing Frame (MDF) or
                  Digital Cross Connect (DSX) panel to a desired line or trunk.
                  Such functionality shall include all of the features,
                  functions, and capabilities that the underlying Sprint switch
                  providing such Local Switching function provides for Sprint's
                  own services.   Functionality may include, but is not limited
                  to:   line signaling and signaling software, digit reception,
                  dialed number translations, call screening, routing,
                  recording, call supervision, dial tone, switching, telephone
                  number provisioning, announcements, calling features and
                  capabilities (including call processing), Centrex, or Centrex
                  like services, Automatic Call Distributor (ACD), CLEC
                  pre-subscription (e.g., long distance Carrier, intraLATA
                  toll), Carrier Identification Code (CIC) portability
                  capabilities, testing and other operational features inherent
                  to the switch and switch software.

            4.2 Technical Requirements

                  4.2.1 Sprint shall provide its standard recorded
                  announcements (as designated by CLEC) and call progress tones
                  to alert callers of call progress and disposition.   CLEC
                  will use the BFR process for unique announcements in
                  accordance with Section 6 of Part A of this Agreement.

                  4.2.2 Sprint shall change a subscriber from Sprint's
                  Telecommunications Services to CLEC's Telecommunications
                  Services without loss of feature functionality unless
                  expressly agreed otherwise by CLEC.

                  4.2.3 Sprint shall control congestion points such as mass
                  calling events, and network routing abnormalities, using
                  capabilities such as Automatic Call Gapping, Automatic
                  Congestion Control, and Network Routing Overflow.
                  Application of such control shall be competitively neutral
                  and not favor any user of unbundled switching or Sprint.

                  4.2.4 Sprint shall offer all Local Switching features that
                  are technically feasible and provide feature offerings at
                  parity with those provided by Sprint to itself or any other
                  party.




<PAGE>   53



   4.3  Interface Requirements:
        4.3.1           Sprint shall provide the following interfaces to loops:

                        4.3.1.1 Standard Tip/Ring interface including loopstart
                        or groundstart, on-hook signaling (e.g., for calling
                        number, calling name and message waiting lamp);

                        4.3.1.2 Coin phone signaling;

                        4.3.1.3 Basic and Primary Rate Interface ISDN adhering
                        to ANSI standards Q.931, Q.932 and appropriate Bellcore
                        Technical Requirements;

                        4.3.1.4 Two-wire analog interface to PBX to include
                        reverse battery, E&M, wink start and DID;

                        4.3.1.5 Four-wire analog interface to PBX to include
                        reverse battery, E&M, wink start and DID;

                        4.3.1.6 Four-wire DS1 interface to PBX or subscriber
                        provided equipment (e.g., computers and voice response
                        systems);

            4.4 Sprint shall provide access to interfaces, including but not
            limited to:

                  4.4.1 SS7 Signaling Network, Dial Plus or Multi-Frequency
                  trunking if requested by CLEC;

                  4.4.2 Interface to CLEC operator services systems or Operator
                  Services through appropriate trunk interconnections for the
                  system; and

                  4.4.3 Interface to CLEC directory assistance services through
                  the CLEC switched network or to Directory Services through
                  the appropriate trunk interconnections for the system; and
                  950 access or other CLEC required access to interexchange
                  carriers as requested through appropriate trunk interfaces.

SECTION 5. DIRECTORY ASSISTANCE SERVICE

            5.1 Sprint shall provide for the routing of directory assistance
            calls (including but not limited to 411, 555-1212, NPA-555-1212)
            dialed by CLEC subscribers directly to, at CLEC's option, either
            (a) the CLEC DA




<PAGE>   54


            service platform to the extent Sprint's switch can perform this
            customized routing, or (b) Sprint's DA service platform to the
            extent there is a DA service platform for that serving area.

                  5.1.1 Sprint shall provide CLEC with the same level of
                  support for the provisioning of Directory Assistance as
                  Sprint provides itself.   Quality of service standards shall
                  be measured at the aggregate level in accordance with
                  standards and performance measurements that are at parity
                  with the standards and/or performance measurements that
                  Sprint uses and/or which are required by law or regulatory
                  agency rules or orders.

                  5.1.2 Directory Assistance services provided by Sprint to
                  CLEC subscribers shall be branded in accordance with Section
                  11 of Part A of this Agreement.

SECTION 6: OPERATOR SERVICES

            6.1 Sprint shall provide for the routing of local Operator Services
            calls (including but not limited to 0+, 0-) dialed by CLEC
            subscribers directly to either the CLEC operator Service platform
            or Sprint Operator Service platform to the extent Sprint's switch
            can perform this customized routing.

                  6.1.1. Sprint shall provide Operator Services to CLEC as
                  described below until, at CLEC's discretion, Sprint routes
                  calls to the CLEC Local Operator Services platform.

                        6.1.1.1.1 Sprint agrees to provide CLEC subscribers the
                        same Operator Services available to Sprint subscribers.
                        Sprint shall make available its service enhancements
                        on a non-discriminatory basis.

                        6.1.1.1.2 Operator Services provided to CLEC
                        subscribers shall be branded in accordance with Section
                        11 of Part A of this Agreement.

                  6.1.2 Sprint shall exercise the same level of fraud control
                  in providing Operator Service to CLEC that Sprint provides
                  for its own operator service.

SECTION 7:  TRANSPORT
           7.1    Common Transport





<PAGE>   55


                  7.1.1 Definition:   Common Transport provides a local
                  interoffice transmission path between the Sprint tandem
                  switch and a Sprint or CLEC end office switch.   Common
                  transport is shared between multiple customers and is
                  required to be switched at the tandem.

                  7.1.2 Sprint shall offer Common Transport at DS0, DS1, DS3,
                  STS-1 or higher transmission bit rate circuits.

                  7.1.3 Sprint shall be responsible for the engineering,
                  provisioning, and maintenance of the underlying equipment and
                  facilities that are used to provide Common Transport

             7.2  Dedicated Transport
                  7.2.1       Definition:

                        Dedicated Transport provides a local interoffice
                        transmission path between Sprint and/or CLEC central
                        offices.   Dedicated transport is limited to the use of
                        a single customer and does not require switching at a
                        tandem.

                  7.2.2 Technical Requirements

                        Where technologically feasible and available, Sprint
                        shall offer Dedicated Transport consistent with the
                        underlying technology as follows:

                        7.2.2.1 When Sprint provides Dedicated Transport as a
                        circuit or a system, the entire designated transmission
                        circuit or system (e.g., DS1, DS3, STS-1 ) shall be
                        dedicated to CLEC designated traffic.

                        7.2.2.2 Where Sprint has technology available, Sprint
                        shall offer Dedicated Transport using currently
                        available technologies including, but not limited to,
                        DS1 and DS3 transport systems, SONET (or SDH)
                        Bi-directional Line Switched Rings, SONET (or SDH)
                        Unidirectional Path Switched Rings, and SONET (or SDH)
                        point-to-point transport systems (including linear
                        add-drop systems), at all available transmission bit
                        rates.

SECTION 8  TANDEM SWITCHING
              8.1       Definition:





<PAGE>   56


                  Tandem Switching is the function that establishes a
                  communications path between two switching offices (connecting
                  trunks to trunks) through a third switching office (the
                  tandem switch) including but not limited to CLEC, Sprint,
                  independent telephone companies, IXCs and wireless Carriers.

            8.2 Technical Requirements

                  8.2.1 The requirements for Tandem Switching include, but are
                  not limited to, the following:

                        8.2.1.1 Interconnection to Sprint tandem(s) will
                        provide CLEC local interconnection for local and toll
                        access service purposes to the Sprint end offices and
                        NXXs which interconnect with that tandem(s) either
                        directly or through other Sprint facilities for local
                        and toll service purposes, and to other companies which
                        are likewise connected to that tandem(s).

                        8.2.1.2 Interconnection to a Sprint tandem for transit
                        purposes will provide CLEC interexchange access to
                        Sprint, Interexchange Carriers ("IXCs"), Carriers,
                        ILECs, and CMRS providers which are connected to that
                        tandem.

                        8.2.1.3 Where a Sprint Tandem Switch also provides
                        End-Office Switch functions, interconnection to a
                        Sprint tandem serving that exchange will also provide
                        CLEC access to Sprint's end offices and access the NXXs
                        served by that individual end-office.

                  8.2.2 Tandem Switching shall preserve CLASS/LASS features and
                  Caller ID as traffic is processed.

                  8.2.3 To the extent technically feasible, Tandem Switching
                  shall record billable events and send them to the area
                  billing centers designed by CLEC.

                  8.2.4 Tandem Switching shall control congestion using
                  capabilities such as Automatic Congestion Control and Network
                  Routing Overflow.   Congestion control provided or imposed on
                  CLEC traffic shall be at parity with controls being provided
                  or imposed on Sprint traffic (e.g.  Sprint shall not block
                  CLEC traffic and leave its traffic unaffected or less
                  affected.)




<PAGE>   57


                  8.2.5 The Local Switching and Tandem Switching functions may
                  be combined in an office.   If this is done, both Local
                  Switching and Tandem switching shall provide all of the
                  functionality required of each of those Network Elements in
                  this Agreement.

                  8.2.6 Tandem Switching shall provide interconnection to the
                  E911 PSAP where the underlying Tandem is acting as the E911
                  Tandem.

            8.3 Interface Requirements

                  8.3.1 Tandem Switching shall interconnect, with direct
                  trunks, to all carriers with which Sprint interconnects.

                  8.3.2 Sprint shall provide all signaling necessary to provide
                  Tandem Switching with no loss of feature functionality.

SECTION 9  NETWORK INTERFACE DEVICE
           9.1    Definition:


                  The Network Interface Device (NID) is a single-line
                  termination device or that portion of a multiple-line
                  termination device required to terminate a single line or
                  circuit.   The function of the NID is to establish the
                  network demarcation point between a carrier and its
                  subscriber.   The NID features two independent chambers or
                  divisions which separate the service provider's network from
                  the subscriber's inside wiring.   Each chamber or division
                  contains the appropriate connection points or posts to which
                  the service provider, and the subscriber each make their
                  connections.   The NID or protector provides a protective
                  ground connection, provides protection against lightning and
                  other high voltage surges and is capable of terminating
                  cables such as twisted pair cable.

                  9.1.1 CLEC may connect its NID to Sprint's NID.

                  9.1.2 With respect to multiple-line termination devices, CLEC
                  shall specify the quantity of NIDs it requires within such
                  device.

                        Figure 1 shows a schematic of a NID.




<PAGE>   58


                               [Graphic]

                  FIGURE 1 - NETWORK INTERFACE DEVICE

            9.2 Technical Requirements

                  9.2.1 The Sprint NID shall provide a clean, accessible point
                  of connection for the inside wiring and for the Distribution
                  Media and/or cross connect to CLEC's NID and shall maintain a
                  connection to ground that meets the requirements set forth
                  below.   Each party shall ground its NID independently of the
                  other party's NID.

                  9.2.2 The NID shall be the interface to subscribers' premises
                  wiring for all loop technologies.




<PAGE>   59



SECTION 10  SIGNALING SYSTEMS AND DATABASES
        10.1      Signaling Systems
                        10.1.1   Signaling Link Transport
                        10.1.1.1 Definition:

                                 Signaling Link Transport is a set of two or
                                 four dedicated 56 Kbps transmission paths
                                 between CLEC-designated Signaling Points of
                                 Interconnection (SPOI) that provides
                                 appropriate physical diversity and a cross
                                 connect at a Sprint STP site.

                        10.1.1.2 Technical Requirements

                                 10.1.1.2.1 Signaling Link Transport shall
                                 consist of full duplex mode 56 Kbps
                                 transmission paths.

                        10.1.1.3 Interface Requirements

                                 10.1.1.3.1 There shall be a DS1 (1.544 Mbps)
                                 interface at the CLEC-designated SPOIs.   Each
                                 56 Kbps transmission path shall appear as a
                                 DS0 channel within the DS1 interface.

                        10.1.2   Signaling Transfer Points (STPs)
                        10.1.2.1 Definition:

                                 Signaling Transfer Points (STPs) provide
                                 functionality that enable the exchange of SS7
                                 messages among and between switching elements,
                                 database elements and signaling transfer
                                 points.

                                 10.1.2.1.1 Figure 2 depicts Signaling Transfer
                                 Points.




<PAGE>   60


                               [Graphic]

                 FIGURE 2 - SIGNALING TRANSFER POINTS.

                        10.1.2.2 Technical Requirements

                                 STPs shall provide access to and fully support
                                 the functions of all other Network Elements
                                 connected to the Sprint SS7 network.   These
                                 include:

                                 10.2.2.2.1 Sprint Local Switching or Tandem
                                 Switching;

                                 10.2.2.2.2 Sprint Service Control
                                 Points/DataBases;

                                 10.2.2.2.3 Third-party local or tandem
                                 switching systems; and

                                 10.2.2.2.4 Third-party-provided STPs.




<PAGE>   61


                        10.1.2.3 Interface Requirements

                                 10.1.2.3.1 Sprint shall provide the following
                                 STPs options to connect CLEC or
                                 CLEC-designated local switching systems or
                                 STPs to the Sprint SS7 network:

                                        10.1.2.3.1.1 An A-link interface from
                                        CLEC local switching systems; and,

                                        10.1.2.3.1.2 B or D-link interface from
                                        CLEC STPs.

                                 10.1.2.3.2 Each type of interface shall be
                                 provided by one or more sets (layers) of
                                 signaling links, as follows:

                                        10.1.2.3.2.1 An A-link layer shall
                                        consist of two links, as depicted in
                                        Figure 3.

                               [Graphic]

FIGURE 3.   A-LINK INTERFACE

                                        10.1.2.3.2.2 A B or D-link layer shall
                                        consist of four links, as depicted in
                                        Figure 4.




<PAGE>   62


                               [Graphic]

                        Figure 4.   D-Link Interface

                                        10.1.2.3.3 Signaling point of
                                        Interconnection (SPOI) for each link
                                        shall be located at a cross-connect
                                        element, such as a DSX-1, in the
                                        Central Office (CO) where the Sprint
                                        STPs is located.   There shall be a DS1
                                        or higher rate transport interface at
                                        each of the SPOIs.   Each signaling
                                        link shall appear as a DSO channel
                                        within the DS1 or higher rate
                                        interface.

            10.2 Line Information Database (LIDB)

                  10.2.1 The LIDB is a transaction-oriented database accessible
                       through Common Channel Signaling (CCS) networks.   It
                       contains records associated with subscribers Line
                       Numbers and Special Billing Numbers.   LIDB accepts
                       queries from other Network Elements, or CLEC's network,
                       and provides appropriate responses.   The query
                       originator need not be the owner of LIDB data.   LIDB
                       queries include functions such as screening billed
                       numbers that provides the ability to accept Collect or
                       Third Number Billing calls and validation of Telephone
                       Line Number based non-proprietary calling cards.   The
                       interface for the LIDB functionality is the interface
                       between the Sprint CCS network and other CCS networks.
                       LIDB also interfaces to administrative systems.  The
                       administrative system interface provides Work Centers
                       with an interface to LIDB for functions such as
                       provisioning, auditing of data, access to LIDB
                       measurements and reports.




<PAGE>   63


                  10.2.2 Technical Requirements

                        10.2.2.1 Prior to the availability of a long-term
                        solution for Number Portability, Sprint shall enable
                        CLEC to store in Sprint's LIDB any subscriber Line
                        Number or Special Billing Number record, whether ported
                        or not, for which the NPA-NXX or NXX-0/IXX Group is
                        supported by that LIDB.

                        10.2.2.2 Prior to the availability of a long-term
                        solution for Number Portability, Sprint shall enable
                        CLEC to store in Sprint's LIDB any subscriber Line
                        Number or Special Billing Number record, whether ported
                        or not, and NPA-NXX and NXX-0/IXX Group Records,
                        belonging to an NPA-NXX or NXX-0/1 XX owned by CLEC.

                        10.2.2.3 Subsequent to the availability of a long-term
                        solution for Number Portability, Sprint shall enable
                        CLEC to store in Sprint's LIDB any subscriber Line
                        Number or Special Billing Number record, whether ported
                        or not, regardless of the number's NPA-NXX or
                        NXX-0/IXX.

                        10.2.2.4 Sprint shall perform the following LIDB
                        functions for CLEC's subscriber records in LIDB:
                        Billed Number Screening (provides information such as
                        whether the Billed Number may accept Collect or Third
                        Number Billing calls); and Calling Card Validation.

                        10.2.2.5 Sprint shall process CLEC's subscriber records
                        in LIDB at parity with Sprint subscriber records, with
                        respect to other LIDB functions (as defined in the
                        technical reference in Section 13.5).   Sprint shall
                        indicate to CLEC what additional functions (if any) are
                        performed by LIDB in their network.

                        10.2.2.6 Sprint shall perform backup and recovery of
                        all of CLEC's data in LIDB at parity with backup and
                        recovery of all other records in the LIDB, including
                        sending to LIDB all changes made since the date of the
                        most recent backup copy.




<PAGE>   64



              10.3  Toll Free Number Database
                10.3.1  Definition

                        10.3.1.1 The Toll Free Number Database provides
                        functionality necessary for toll free (e.g., 800 and
                        888) number services by providing routing information
                        and additional vertical features during call set-up in
                        response to queries from SSPs.   Sprint shall provide
                        the Toll Free Number Database in accordance with the
                        following:

                  10.3.2 Technical Requirements

                        10.3.2.1 Sprint shall make the Sprint Toll Free Number
                        Database available for CLEC to query, from CLEC's
                        designated switch including Sprint unbundled local
                        switching with a toll-free number and originating
                        information.

                        10.3.2.2 The Toll Free Number Database shall return
                        carrier identification and, where applicable, the
                        queried toll free number, translated numbers and
                        instructions as it would in response to a query from a
                        Sprint switch.

                  10.3.3 Interface Requirements

                        10.3.3.1 The signaling interface between the CLEC or
                        other local switch and the Toll-Free Number database
                        shall use the TCAP protocol, together with the
                        signaling network interface.





<PAGE>   65


                         PART C - ATTACHMENT IV

                            INTERCONNECTION

SECTION 1. LOCAL INTERCONNECTION TRUNK ARRANGEMENT

            1.1  The Parties agree to initially use 2-Way trunks
                 (1-way directionalized) for an interim period of 120 days
                 after date of initial trunk turn-up.   Either Party may extend
                 the use of 1-way trunks for an additional 30 days, if
                 necessary for engineering and billing purposes; provided that
                 the Parties shall transition all 1-way trunks established
                 under this Agreement.

                  1.1.1 The Parties shall initially reciprocally terminate
                  Local Traffic and IntraLATA/lnterLATA toll calls originating
                  on each others' networks as follows:

                        1.1.1.1 The Parties shall make available to each other
                        two-way trunks for the reciprocal exchange of combined
                        Local Traffic, and non-equal access IntraLATA toll
                        traffic.

                        1.1.1.2 Separate two-way trunks will be made available
                        for the exchange of equal-access InterLATA or IntraLATA
                        interexchange traffic that transits Sprint's network.
                        Upon agreement between CLEC and Sprint, equal access
                        InterLATA and/or IntraLATA traffic may be combined on
                        the same trunk group as Local Traffic, non-equal access
                        IntraLATA toll traffic, and local transit traffic.

                        1.1.1.3 Separate trunks will be utilized for connecting
                        CLEC's switch to each 911/E911 tandem.

                        1.1.1.4 Separate trunk group will be utilized for
                        connecting CLEC's switch to Sprint's Operator Service
                        center for operator-assisted busy line
                        interrupt/verify.

                        1.1.1.5 Separate trunk group will be utilized for
                        connecting CLEC's switch to Sprint's Directory
                        Assistance center in instances where CLEC is purchasing
                        Sprint's unbundled Directory Assistance service.




<PAGE>   66


            1.2  Interconnection Point

                  1.2.1 "Interconnection Point" or "IP" means the physical
                  point that establishes the technical interface, the test
                  point, and the operational responsibility hand-off between
                  CLEC and Sprint for the local interconnection of their
                  networks.

                  1.2.2 CLEC will be responsible for engineering and
                  maintaining its network on its side of the IP.   Sprint will
                  be responsible for engineering and maintaining its network on
                  its side of the IP.   If and when the parties choose to
                  interconnect at a mid-span meet, CLEC and Sprint will jointly
                  provision the facilities that connect the two networks.
                  Sprint will be required to provide fifty (50) percent of the
                  facilities or to its exchange boundary, whichever is less.
                  CLEC will be required to provide fifty (50) percent of the
                  facilities or to Sprint's exchange boundary, whichever is
                  greater.

SECTION 2.   COMPENSATION MECHANISMS
  2.1               Interconnection Point
                          2.1.1 Each party is responsible for bringing their 
                         facilities to the IP. 
  2.2               Compensation for Local Traffic Transport and Termination

                  2.2.2 The IP determines the point at which the originating
                  carrier shall pay the terminating carrier for the completion
                  of that traffic.   The following compensation elements shall
                  apply:

                              2.2.2.1 "Transport", which includes the two rate
                              elements of transmission and any necessary tandem
                              switching of Local Traffic from the
                              interconnection point between the two carriers to
                              the terminating carrier's end-office switch that
                              directly serves the called end-user.

                              2.2.2.2 "Termination", which includes the
                              switching of Local Traffic at the terminating
                              carrier's end office switch.

            2.3  When a CLEC subscriber places a call to Sprint's
                 subscriber, CLEC will hand off that call to Sprint at the IP.
                 Conversely, when Sprint hands over Local Traffic to CLEC for
                 CLEC to transport and terminate, Sprint may use the
                 established IP or Sprint may designate its own IP.




<PAGE>   67


            2.4  CLEC and Sprint may designate an IP at any
                 technically feasible point including but not limited to any
                 electronic or manual cross-connect points, collocations,
                 entrance facilities, and mid-span meets.   The transport and
                 termination charges for Local Traffic flowing through an IP
                 shall be as follows:

                  2.4.1 When calls from CLEC are terminating on Sprint's
                  network through the Sprint tandem switch, CLEC will pay
                  Sprint for transport charges from the IP to the tandem for
                  dedicated transport.   CLEC shall also pay a charge for
                  tandem switching, or common transport to the end office, and
                  end-office termination.

                  2.4.2 When Sprint terminates calls to CLEC's subscribers
                  using CLEC's switch, Sprint shall pay CLEC for transport
                  charges from the IP to the CLEC switching center for
                  dedicated transport.   Sprint shall also pay to CLEC a charge
                  symmetrical to its own charges for the functionality actually
                  provided by CLEC for call termination.

                  2.4.3 CLEC may choose to establish direct trunking to any
                  given end office.   If CLEC leases trunks from Sprint, it
                  shall pay charges for dedicated transport.   For calls
                  terminating from CLEC to subscribers served by these
                  directly-trunked end offices, CLEC shall also pay an
                  end-office termination.   For Sprint traffic terminating to
                  CLEC over the direct end office trunking, compensation
                  payable by Sprint shall be the same as that detailed in
                  Section 2.4.2 above.

SECTION 3. SIGNALING

            3.1 Signaling protocol.   The parties will interconnect their
            networks using SS7 signaling where technically feasible and
            available as defined in FR 905 Bellcore Standards including ISDN
            user part ("ISUP") for trunk signaling and transaction capabilities
            application part ("TCAP") for CCS-based features in the
            interconnection of their networks.   All Network Operations Forum
            (NOF) adopted standards shall be adhered to.

            3.2 Refer to Attachment III, Section 10 for detailed terms of SS7
            Network Interconnection.

            3.3 Standard interconnection facilities shall be extended
            superframe (ESF) with B8ZS line code.   Where ESF/B8ZS is not
            available, CLEC will agree to using other interconnection protocols
            on an interim basis until the standard ESF/B8ZS is available.
            Sprint will provide anticipated dates of availability for those
            areas not currently ESF/B8ZS compatible.




<PAGE>   68


                  3.3.1 Where CLEC is unwilling to utilize an alternate
                  interconnection protocol, CLEC will provide Sprint an initial
                  forecast of 64 Kbps clear channel capability ("64K CCC")
                  trunk quantities within 30 days of the Approval Date
                  consistent with the forecasting agreements between the
                  parties.   Upon receipt of this forecast, the parties will
                  begin joint planning for the engineering, procurement, and
                  installation of the segregated 64K CCC Local Interconnection
                  Trunk Groups, and the associated B8ZS extended super frame
                  ("ESF") facilities, for the sole purpose of transmitting 64K
                  CCC data calls between CLEC and Sprint.   Where additional
                  equipment is required, such equipment would be obtained,
                  engineered, and installed on the same basis and with the same
                  intervals as any similar growth job for IXC, CLEC, or Sprint
                  internal customer demand for 64K CCC trunks.   Where
                  technically feasible, these trunks will be established as
                  two-way.

SECTION 4.  NETWORK SERVICING
       4.1        Trunk Forecasting:

                  4.1.1 The Parties shall work towards the development of joint
                  forecasting responsibilities for traffic utilization over
                  trunk groups.   Orders for trunks that exceed forecasted
                  quantities for forecasted locations will be accommodated as
                  facilities and or equipment are available.   The Parties
                  shall make all reasonable efforts and cooperate in good faith
                  to develop alternative solutions to accommodate orders when
                  facilities are not available.   Intercompany forecast
                  information must be provided by the Parties to each other
                  once a year.   The annual forecasts shall include:

                              4.1.1.1 Yearly forecasted trunk quantities (which
                              include baseline data that reflect actual tandem
                              and end office Local Interconnection and meet
                              point trunks and tandem-subtending Local
                              Interconnection end office equivalent trunk
                              requirements for no more than two years (current
                              plus one year);

                              4.1.1.2 The use of Common Language Location
                              Identifier (CLLI-MSG), which are described in
                              Bellcore documents BR 795-100-100 and BR
                              795-400-100;

                              4.1.1.3 Description of major network projects
                              that affect the other Party will be provided in
                              the semi-annual forecasts.   Major network
                              projects include but are not limited to trunking
                              or network rearrangements, shifts in anticipated
                              traffic




<PAGE>   69


                              patterns, or other activities by either party
                              that are reflected by a significant increase or
                              decrease in trunking demand for the following
                              forecasting period.

                  4.1.2 Parties shall meet to review and reconcile their
                  forecasts if forecasts vary significantly.

                  4.1.3 Each Party shall provide a specified point of contact
                  for planning forecasting and trunk servicing purposes.

                  4.1.4 Trunking can be established to tandems or end offices
                  or a combination of both via either one-way or two-way
                  trunks.   Trunking will be at the DS-0 level, DS-1 level,
                  DS-3/OC-3 level, or higher, as agreed upon by CLEC and
                  Sprint.   Initial trunking will be established between the
                  CLEC switching centers and Sprint's access tandem(s).   The
                  Parties may utilize direct end office trunking depending upon
                  tandem exhaust, traffic volumes, or by mutual agreement.

            4.2  Grade of Service

                  4.2.1 A blocking standard of one percent (.01 ) during the
                  average busy hour, as defined by each Party's standards, for
                  final trunk groups between a CLEC end office and a Sprint
                  access tandem carrying meet point traffic shall be
                  maintained.   All other final trunk groups are to be
                  engineered with a blocking standard of one percent (.01).
                  Direct end office trunk groups are to be engineered with a
                  blocking standard of one percent (.01).

            4.3  Trunk Servicing

                  4.3.1 Orders between the Parties to establish, add, change or
                  disconnect trunks shall be processed by use of an ASR, or
                  another industry standard eventually adopted to replace the
                  ASR for local service ordering.

SECTION 5.  NETWORK MANAGEMENT
            5.1   Protective Protocols

                        5.1.1 Either Party may use protective network traffic
                        management controls such as 7-digit and 10-digit code
                        gaps on traffic toward each others network, when
                        required to protect the public switched network from
                        congestion due to facility failures, switch congestion
                        or failure or focused overload.   CLEC and Sprint will
                        immediately




<PAGE>   70


                        notify each other of any protective control action
                        planned or executed.

            5.2  Expansive Protocols

                  5.2.1 Where the capability exists, originating or terminating
                  traffic reroutes may be implemented by either party to
                  temporarily relieve network congestion due to facility
                  failures or abnormal calling patterns.   Reroutes will not be
                  used to circumvent normal trunk servicing.   Expansive
                  controls will only be used when mutually agreed to by the
                  parties.

            5.3  Mass Calling

                  5.3.1 CLEC and Sprint shall cooperate and share pre-planning
                  information, where available, regarding cross-network
                  call-ins expected to generate large or focused temporary
                  increases in call volumes, to prevent or mitigate the impact
                  of these events on the public switched network.

SECTION 6. USAGE MEASUREMENT

            6.1  Each Party shall calculate terminating
                 interconnection minutes of use based on standard AMA
                 recordings made within each Party's network, these recordings
                 being necessary for each Party to generate bills to the other
                 Party.   In the event either Party cannot measure minutes
                 terminating on its network, the other Party shall provide the
                 measuring mechanism or the Parties shall otherwise agree on an
                 alternate arrangement.

            6.2  Measurement of minutes of use over Local
                 Interconnection trunk groups shall be in actual conversation
                 seconds.   The total conversation seconds over each individual
                 Local Interconnection trunk group will be totaled for the
                 entire monthly bill period and then rounded to the next whole
                 minute.

            6.3  Each Party shall provide to the other, within 20
                 business days after the end of each quarter (commencing with
                 the first full quarter after the effective date of this
                 Agreement), a usage report with the following information
                 regarding traffic sent by the recording Party over the Local
                 Interconnection trunk groups whether the arrangement is direct
                 interconnection or transit through a third party:




<PAGE>   71


                  6.3.1 Total traffic volume described in terms of minutes and
                  messages and by call type (local, toll, and other) terminated
                  to each other over the Local Interconnection trunk groups,
                  and

                  6.3.2.Percent Local Use (PLU)

SECTION 7.  RESPONSIBILITIES OF THE PARTIES


            7.1  Sprint and CLEC agree to treat each other fairly,
                 nondiscriminatorily, and equally for all items included in
                 this Agreement, or related to the support of items included in
                 this Agreement.

            7.2  CLEC and Sprint will review engineering
                 requirements on a semi-annual basis and establish forecasts
                 for trunk and facilities utilization provided under this
                 Agreement.   Sprint and CLEC will work together to begin
                 providing these forecasts within 30 days from the Approval
                 Date.   New trunk groups will be implemented as dictated by
                 engineering requirements for either Sprint or CLEC.

            7.3  CLEC and Sprint shall share responsibility for
                 all Control Office functions for Local Interconnection Trunks
                 and Trunk Groups, and both parties shall share the overall
                 coordination, installation, and maintenance responsibilities
                 for these trunks and trunk groups.

            7.4  CLEC is responsible for all Control Office
                 functions for the meet point trunking arrangement trunks and
                 trunk groups, and shall be responsible for the overall
                 coordination, installation, and maintenance responsibilities
                 for these trunks and trunk groups.

            7.5  CLEC and Sprint shall:

                  7.5.1 Provide trained personnel with adequate and compatible
                  test equipment to work with each other's technicians.

                  7.5.2 Notify each other when there is any change affecting
                  the service requested, including the due date.

                  7.5.3 Coordinate and schedule testing activities of their own
                  personnel, and others as applicable, to ensure its
                  interconnection trunks/trunk groups are installed per the
                  interconnection order, meet agreed-upon acceptance test
                  requirements, and are placed in service by the due date.




<PAGE>   72


                  7.5.4 Perform sectionalization to determine if a trouble is
                  located in its facility or its portion of the interconnection
                  trunks prior to referring the trouble to each other.

                  7.5.5 Advise each other's Control Office if there is an
                  equipment failure which may affect the interconnection
                  trunks.

                  7.5.6 Provide each other with a trouble reporting/repair
                  contact number that is readily accessible and available 24
                  hours/7 days a week.   Any changes to this contact
                  arrangement must be immediately provided to the other party.

                  7.5.7 Provide to each other test-line numbers and access to
                  test lines.

                  7.5.8 Cooperatively plan and implement coordinated repair
                  procedures for the meet point and Local Interconnection
                  trunks and facilities to ensure trouble reports are resolved
                  in a timely and appropriate manner.





<PAGE>   73


                         PART C - ATTACHMENT V

                              COLLOCATION

SECTION 1. INTRODUCTION

         This Attachment sets forth the requirements for Collocation.
SECTION 2.  TECHNICAL REQUIREMENTS

            2.1 Sprint shall provide space, as requested by CLEC, to meet
            CLEC's needs for placement of equipment, interconnection, or
            provision of service ("Collocated Space") in accordance with this
            Attachment V and Sprint's FCC #1 tariff and United Telephone
            Company of Missouri tariff.

                  2.1.1 CLEC shall not occupy or use the Collocated Space, or
                  permit the Collocated Space to be occupied or used, for any
                  purpose, act or thing, whether or not otherwise permitted by
                  this Agreement, if such purpose, act or thing (i) is in
                  violation of any public law, ordinance or governmental
                  regulation; (ii) may be dangerous to persons or property;
                  (iii) may invalidate or increase the amount of premiums
                  beyond such increase as results from the contemplated
                  occupancy for any insurance policy carried on the building or
                  covering its operation; or (iv) violates the terms of this
                  Agreement.

            2.2 Sprint shall provide intraoffice facilities (e.g., DS0, DS-1,
            DS-3,-and other available transmission speeds) as agreed to by CLEC
            and Sprint to meet CLEC's need for placement of equipment,
            interconnection, or provision of service.

            2.3 Sprint agrees to allow CLEC's employees and designated agents
            unrestricted but escorted access to CLEC dedicated space in manned
            Sprint offices twenty-four (24) hours per day each day of the week.
            CLEC shall use reasonable efforts to provide Sprint twenty-four
            (24) hours prior notice of such access.   Sprint may place
            reasonable security restrictions, including an escort requirement
            and charge for such escort, on access by CLEC's employees and
            designated agents to the Collocated Space in unmanned Sprint
            offices.   Notwithstanding the above, Sprint agrees that such space
            shall be available to CLEC's employees and designated agents
            twenty-four (24) hours per day each day of the week upon
            twenty-four (24) hours prior notice.   In no case should any
            reasonable security restrictions be more restrictive than those
            Sprint places on their own




<PAGE>   74


            personnel, except with respect to an escort requirement as set
            forth above.

            2.4 CLEC may collocate the amount and type of equipment it deems
            necessary in its Collocated Space in accordance with FCC Rules and
            Regulations and Sprint's FCC #1 tariff and United Telephone Company
            of Missouri tariff.   Such equipment shall meet Bellcore
            specifications and be manufactured by a Sprint approved vendor.
            Approved vendors will, at a minimum, be vendors Sprint currently
            approves for its own use.   Sprint will approve additional vendors
            provided they meet industry standards.

            2.5 Sprint shall permit a collocating telecommunications carrier to
            interconnect its network with that of another collocating
            telecommunications carrier at the Sprint premises and to connect
            its collocated equipment to the collocated equipment of another
            telecommunications carrier within the same premises.   Sprint in
            all cases shall provide such interconnections.

            2.6 Sprint shall permit CLEC or its designated subcontractor to
            perform the construction of physical collocation arrangements,
            provided, however, that any such CLEC subcontractor shall be
            subject to Sprint's approval, such approval shall not be
            unreasonably withheld.   Approval by Sprint shall be based on the
            same criteria it uses in approving contractors for its own
            purposes.

            2.7 CLEC shall not make substantial installations, alterations or
            additions in or to the Collocated Space without submitting plans
            and specifications to Sprint and securing the prior written consent
            of Sprint in each instance.   Sprint's consent shall not be
            unreasonably withheld or unduly delayed for non-structural interior
            alteration to the Collocated Space that do not adversely affect the
            building's appearance, value, structural strength and mechanical
            integrity.   Such work shall be done at the sole expense of CLEC.

                  2.7.1 All installations, alterations and additions shall be
                  constructed in a good and workmanlike manner and only new and
                  good grades of material shall be used, and shall comply with
                  all insurance requirements, governmental requirements, and
                  terms of this Agreement.   Work shall be performed at such
                  times and in such manner as to cause a minimum of
                  interference with Sprint's transaction of business.   CLEC
                  shall permit Sprint to inspect all construction operations
                  within the premises and to approve contractors, which
                  approval shall not be unreasonably withheld.   If alterations
                  are made by CLEC's contractors, CLEC shall furnish to Sprint
                  prior to commencement thereof, building permits and




<PAGE>   75


                  certificates of insurance to be provided by CLEC's
                  contractors and sub-contractors.   Any such insurance to be
                  provided by CLEC's contractors or sub-contractors shall
                  provide for coverage in amounts not less than as required by
                  Sprint of CLEC under Section 2.45 of this Attachment V.
                  Upon completion of any installation, alteration or addition,
                  contractor's affidavits and full and final waivers of lien
                  covering all labor and material expended and used shall be
                  furnished to Sprint.   CLEC and its contractors and
                  subcontractors shall hold Sprint harmless from all claims,
                  costs, damages, liens and expenses which may arise out of or
                  be connected in any way with installations, alterations or
                  additions.

                  2.7.2 All installations, alterations and additions which take
                  the form of fixtures, except trade fixtures, placed in the
                  Collocated Space by and at the expense of CLEC or others
                  shall become the property of Sprint, and shall remain upon
                  and be surrendered with the Collocated Space.   Upon
                  termination of a license for Collocated Space, however,
                  Sprint shall have the right to require CLEC to remove such
                  fixtures and installations, alterations or additions at
                  CLEC's expense, and to surrender the Collocated Space in the
                  same condition as it was prior to the making of any or all
                  such improvements, reasonable wear and tear excepted.

                  2.7.3 All fixtures and other equipment to be used by CLEC in,
                  about or upon the premises shall be subject to the prior
                  written approval of Sprint, which shall not be unreasonably
                  withheld.

            2.8 Sprint shall provide basic telephone service with a connection
            jack as ordered by CLEC from Sprint for the Collocated Space.
            Upon CLEC's request, this service shall be available at the
            Collocated Space on the day that the space is turned over to CLEC
            by Sprint.

            2.9 Sprint shall provide adequate lighting, ventilation, power,
            heat, air conditioning, and other environmental conditions for
            CLEC's space and equipment.   These environmental conditions shall
            adhere to Bellcore Network Equipment Building System (NEBS)
            standards TR-EOP-000063 or other mutually agreed standards.

                  2.9.1 If CLEC locates equipment or facilities in the
                  Collocated Space which Sprint determines affect the
                  temperature or other environmental conditions otherwise
                  maintained by Sprint in the building, Sprint reserves the
                  right to provide and install supplementary air conditioning
                  units or other environmental control devices for the
                  Collocated Space, and the cost of providing, installing,
                  operating and maintaining any such supplementary air




<PAGE>   76


                  conditioning units or other environmental control devices
                  made necessary solely by CLEC's equipment or facilities shall
                  be paid by CLEC to Sprint.

                  2.9.2 If CLEC's equipment or facilities requires cooling
                  capability in excess of that normally provided by Sprint for
                  its own equipment, any required supplementary air
                  conditioning required by CLEC shall be paid by CLEC to
                  Sprint.

            2.10 Where available and subject to Sprint's standard security
            procedures, Sprint shall provide access to eyewash stations, shower
            stations, bathrooms, and drinking water within the collocated
            facility on a twenty-four (24) hours per day, seven (7) days per
            week basis for CLEC personnel and its designated agents.

            2.11 Sprint shall provide all ingress and egress of fiber and power
            cabling to Collocated Spaces.   CLEC's specific diversity
            requirements for each site or Network Element will be provided in
            the collocation request.

            2.12 Each party shall ensure protection of the other party's
            proprietary subscriber information.   In conjunction with any
            collocation arrangement Sprint and CLEC shall adhere to the
            provisions of Section 13 of Part A of this Agreement.

            2.13 Sprint shall participate in and adhere to negotiated and
            agreed to service guarantees and Performance Standards, if any.

            2.14 Sprint shall provide CLEC with written notice five (5)
            business days prior to those instances where Sprint or its
            subcontractors may be performing work in the general area of the
            Collocated Space, or in the general area of the AC and DC power
            plants which support CLEC equipment.   Sprint will inform CLEC by
            telephone of any emergency related activity that Sprint or its
            subcontractors may be performing in the general area of the
            Collocated Space, or in the general area of the AC and DC power
            plants which support CLEC equipment.   Notification of any
            emergency related activity shall be made immediately prior to the
            start of the activity so that CLEC can take any action required to
            monitor or protect its service.

            2.15 Sprint shall, at its sole expense, except as hereinafter
            provided, provide repair and maintenance of heating, cooling and
            lighting equipment and regularly scheduled refurbishments or
            decorating to the Collocated Space, building and property, in a
            manner consistent with Sprint's normal business practices.




<PAGE>   77


                  2.15.1 Sprint shall, where practical, provide CLEC with 24
                  hours prior notice before making repairs and/or performing
                  maintenance on the Collocated Space; provided, however, that
                  Sprint shall have no obligation to provide such notice if
                  Sprint determines, in the exercise of its sole discretion,
                  that such repair or maintenance must be done sooner in order
                  to preserve the safety of the building or the Collocated
                  Space, or if required to do so by any court or governmental
                  authority.   Work shall be completed during normal working
                  hours or at other times identified by Sprint; provided,
                  however, that CLEC shall pay Sprint for overtime and for any
                  other expenses incurred if such work is done during other
                  than normal working hours at CLEC's request.  CLEC shall have
                  the right, at its sole expense, to be present during repair
                  or maintenance of the Collocated Space.

            2.16 CLEC shall provide Sprint with written notice five (5)
            business days prior to those instances where CLEC or its
            subcontractors may be performing work in the general area of the
            Collocated Space, or in the general area of the AC and DC power
            plants which support Sprint equipment.   CLEC will inform Sprint by
            telephone of any emergency related activity that CLEC or its
            subcontractors may be performing in the general area of the
            Collocated Space, or in the general area of the AC and DC power
            plants which support Sprint equipment.   Notification of any
            emergency related activity shall be made immediately prior to the
            start of the activity so that Sprint can take any action required
            to monitor or protect its service.

            2.17 To the extent Sprint performs the construction of the physical
            collocation arrangement, Sprint shall construct the Collocated
            Space in compliance with mutually agreed collocation request.  Any
            deviation to CLEC's order must thereafter be approved by CLEC.

            2.18 CLEC and Sprint will complete an acceptance walk through of
            those portions of the collocation arrangement provided by Sprint.
            Exceptions that are noted during this acceptance walk through shall
            be corrected by Sprint within five (5) business days after the walk
            through except where circumstances reasonably warrant additional
            time.   In such event, subject to CLEC's consent, which shall not
            be unreasonably withheld, Sprint shall be given additional time.
            The correction of these exceptions from the original collocation
            request shall be at Sprint's expense.

            2.19 Sprint shall provide detailed Telephone Equipment drawings
            depicting the exact location, type, and cable termination
            requirements (i.e., connector type, number and type of pairs, and
            naming convention)




<PAGE>   78


            for Sprint Point of Termination Bay(s) to CLEC within ten (10)
            business days of acceptance of CLEC's request for Collocated Space.

            2.20 Sprint shall provide detailed drawings depicting the exact
            path, with dimensions, for CLEC Outside Plant Fiber ingress and
            egress into Collocated Space within ten (10) business days of the
            acceptance of CLEC's request for Collocated Space.

            2.21 Sprint shall provide detailed power cabling connectivity
            information including the sizes and number of power feeders to CLEC
            within ten (10) business days of the acceptance of CLEC's request
            for Collocated Space.

            2.22 To the extent Sprint performs the construction of the physical
            collocation arrangement, Sprint shall provide positive confirmation
            to CLEC when construction of Collocated Space is 50% completed.
            This confirmation shall also include confirmation of the scheduled
            completion and turnover dates.

            2.23 Sprint shall provide the following information to CLEC within
            ten (10) business days of receipt of a written request from CLEC:

                  2.23.1 Work restriction guidelines.

                  2.23.2 Sprint or Industry technical publication guidelines
                  that impact the design of Sprint collocated equipment.

                  2.23.3 Sprint contacts (names and telephone numbers) for the
                  following areas:

                        Engineering
                        Physical & Logical Security
                        Provisioning
                        Billing (Related to Collocation Services)
                        Operations
                        Site and Building Managers
                        Environmental and Safety

                  2.23.4 Escalation process for the Sprint employees (names,
                  telephone numbers and the escalation order) for any disputes
                  or problems that might arise pursuant to CLEC's collocation.

            2.24 Power as referenced in this document refers to any electrical
            power source supplied by Sprint for CLEC equipment.   It includes
            all superstructure, infrastructure, and overhead facilities,
            including, but not limited to, cable, cable racks and bus bars.
            Sprint will supply power to




<PAGE>   79


            support CLEC equipment at equipment specific DC and AC voltages.
            At a minimum, Sprint shall supply power to CLEC at parity with that
            provided by Sprint to itself or to any third party.   If Sprint
            performance, availability, or restoration falls below industry
            standards, Sprint shall bring itself into compliance with such
            industry standards as soon as technologically feasible.

                  2.24.1 Central office power supplied by Sprint into the CLEC
                  equipment area, shall be supplied in the form of power
                  feeders (cables) on cable racking into the designated CLEC
                  equipment area.   The power feeders (cables) shall
                  efficiently and economically support the requested quantity
                  and capacity of CLEC equipment.   The termination location
                  shall be as requested by CLEC.

                  2.24.2 Sprint shall provide power as requested by CLEC to
                  meet CLEC's need for placement of equipment, interconnection,
                  or provision of service.

                  2.24.3 Sprint power equipment supporting CLEC's equipment
                  shall:

                        2.24.3.1 Comply with applicable industry standards
                        (e.g., Bellcore, NEBS and IEEE) or manufacturer's
                        equipment power requirement specifications for
                        equipment installation, cabling practices, and physical
                        equipment layout or at minimum, at parity with that
                        provided for similar Sprint equipment;

                        2.24.3.2 Have redundant power feeds with physical
                        diversity and battery back-up as required by the
                        equipment manufacturer's specifications for CLEC
                        equipment, or, at minimum, at parity with that provided
                        for similar Sprint equipment;

                        2.24.3.3 Provide, upon CLEC's request, the capability
                        for real time access to power performance monitoring
                        and alarm data that impacts (or potentially may impact)
                        CLEC traffic;

                        2.24.3.4 Provide central office ground, connected to a
                        ground electrode located within the Collocated Space,
                        at a level above the top of CLEC equipment plus or
                        minus 2 feet to the left or right of CLEC's final
                        request; and




<PAGE>   80


                        2.24.3.5 Provide feeder cable capacity and quantity to
                        support the ultimate equipment layout for CLEC
                        equipment in accordance with CLEC's collocation
                        request.

                        2.24.3.6 To the extent Sprint performs the construction
                        of physical collocation arrangements, Sprint shall,
                        within ten (10) business days of CLEC's request:

                                    2.24.3.6.1 The standard prices for
                                    collocation are as set forth in Sprint's
                                    tariffs, and nonstandard charges shall be
                                    negotiated between the parties.

                                    2.24.3.6.2 Provide an installation schedule
                                    and access that will allow Sprint and CLEC
                                    installation efforts in parallel without
                                    jeopardizing either party's personnel
                                    safety or existing services;

                                    2.24.3.6.3 Provide information on existing
                                    power plant alarms that adhere to Bellcore
                                    Network Equipment Building System (NEBS)
                                    standards TREOP-000063;

                        2.24.3.7 Sprint shall provide cabling that adheres to
                        Bellcore Network Equipment Building System (NEBS)
                        standards TR-EOP-000063; 2.24.3.8 Sprint shall provide
                        Lock Out-Tag Out and other electrical safety procedures
                        and devices in conformance with the most stringent of
                        OSHA or industry guidelines.

                  2.24.3 Sprint will provide CLEC with written notification
                  within ten (10) business days of any scheduled AC or DC power
                  work or related activity in the collocated facility that will
                  or might cause an outage or any type of power disruption to
                  CLEC equipment located in Sprint facility.   Sprint shall
                  provide CLEC immediate notification by telephone of any
                  emergency power activity that would impact CLEC equipment.

                  2.24.4 CLEC will provide Sprint with written notification
                  within ten (10) business days of any scheduled AC or DC power
                  work or related activity in the collocated facility that will
                  or might cause an outage or any type of power disruption to
                  Sprint equipment located in CLEC facility.   CLEC shall
                  provide Sprint immediate notification by telephone of any
                  emergency power activity that would impact Sprint equipment.




<PAGE>   81


            2.25 To the extent that space for virtual collocation is available,
            Sprint shall provide virtual collocation where physical collocation
            is not practical for technical reasons or because of space
            limitations.   Sprint shall take collocator demand into account
            when renovating existing facilities and constructing or leasing new
            facilities.

            2.26 Where collocation space and associated requirements are
            available, intervals for physical collocation shall be a maximum of
            three months from the requested date, subject to additional time
            for asbestos removal or extraordinary construction as mutually
            agreed upon by CLEC and Sprint.   Virtual collocations will have a
            maximum interval of 2 months.

            2.27 CLEC may choose to lease unbundled transport from the Sprint,
            or from a third carrier, rather than construct to the Sprint
            facility where equipment will be collocated.

            2.28 Sprint will maintain, at CLEC's expense, CLEC's virtually
            collocated equipment in a manner equal to that with which it
            maintains its own equipment.   Maintenance includes the change out
            of electronic cards provided by CLEC and per CLEC's request.

            2.29 As part of the license granted in Section 4 herein, CLEC, its
            employees, agents and invitees shall have a non-exclusive right to
            use those portions of the common area of the building as are
            designated by Sprint from time to time, including, but not limited
            to, the right to use rest rooms in proximity to the Collocated
            Space, corridors and other access ways from the entrance to the
            building, the Collocated Space, and the parking areas adjacent to
            the building for vehicles of persons while working for or on behalf
            of CLEC at the Collocated Space; provided, however, that Sprint
            shall have the right to reserve parking spaces for Sprint's
            exclusive use or by other occupants of the building.   Sprint does
            not guarantee that there is or will be sufficient parking spaces in
            parking areas to meet CLEC's needs.   All common areas shall remain
            under the exclusive control and management of Sprint, and Sprint
            shall have the right to change the level, location and arrangement
            of parking areas and other common areas as Sprint may deem
            necessary.   Use of all common areas shall be subject to such
            reasonable rules and regulations as Sprint may from time to time
            impose, such as those set forth in Section 2.3 of this Attachment
            V.

            2.30 Where available, Sprint shall furnish passenger elevator
            service as necessary to reach the Collocated Space or common areas
            to which CLEC has access pursuant to the terms of this Attachment V
            24 hours a day, seven days a week.   Where available, freight
            elevator service when




<PAGE>   82


            used by CLEC's contractors, employees or agents shall be provided
            at times reasonably satisfactory to Sprint.

            2.31 CLEC shall regularly inspect the Collocated Space to ensure
            that the Collocated Space is in good working condition.   CLEC
            shall promptly notify Sprint of any damage to the Collocated Space
            or of the need to perform any repair or maintenance of the
            Collocated Space, fixtures and appurtenances (including hardware,
            heating, cooling, ventilating, electrical and other mechanical
            facilities in the Collocated Space).   CLEC shall keep the
            Collocated Space clean and trash free.

                  2.31.1 The cost of all repairs and maintenance performed by
                  or on behalf of Sprint to the Collocation Space or building
                  which are, in Sprint's reasonable judgment, beyond normal
                  repair and maintenance, or are made necessary as a result of
                  misuse or neglect by CLEC or CLEC's employees, invitees, or
                  agents, shall be paid by CLEC to Sprint within 10 days after
                  being billed for such repairs and maintenance by Sprint.

            2.32 CLEC shall, with the prior written consent of Sprint, have the
            right to provide additional fire protection systems within the
            Collocated Space; provided, however, that CLEC may not install or
            use sprinklers or carbon dioxide fire suppression systems within
            the building or the Collocated Space.   If any governmental bureau,
            department or organization or Sprint's insurance carrier requires
            that changes, modifications, or alterations be made to the fire
            protection system, or that additional stand alone fire
            extinguishing, detection or protection devices be supplied within
            the Collocated Space, such changes, modifications or additions
            shall be made by CLEC at it's expense, following review and
            approval by Sprint prior to any work being done.   If any
            governmental bureau, department or organization or Sprint's
            insurance carrier requires that changes or modifications be made to
            the fire protection system or that additional stand alone fire
            extinguishing, detection or protection devices be supplied within
            that portion of the building in which the Collocated Space of
            CLEC's in general are located, such changes, modifications, or
            additions shall be made by Sprint and CLEC shall reimburse Sprint
            for the cost thereof in the same proportion as the square footage
            of the Collocated Space as compared to the total square footage of
            the affected portion of the building.

            2.33 CLEC, its employees, agents, contractors, and business
            invitees shall (i) comply with all rules and regulations which
            Sprint may from time to time adopt for the safety, environmental
            protection, care, cleanliness and/or preservation of the good order
            of the building, the property and the Collocated Space and its
            tenants and occupants, and (ii) comply, at its




<PAGE>   83


            own expense, with all ordinances which are applicable to the
            Collocated Space and with all lawful orders and requirements of any
            regulatory or law enforcement agency requiring the correction,
            prevention and abatement of nuisances in or upon the Collocated
            Space during the term of this Agreement or any extension hereof.

            2.34 CLEC shall not cut or drill into, drive nails or screws into,
            install conduit or wires, or in any way deface any part of the
            Collocated Space or the building, outside or inside, without the
            prior written consent of Sprint.   If CLEC desires signal,
            communications, alarm or other utility or service connections
            installed or changed, the same shall be made by and at the expense
            of CLEC.   Sprint shall have the right of prior approval of such
            utility or service connections, and shall direct where and how all
            connections and wiring for such service shall be introduced and
            run.   In all cases, in order to maintain the integrity of the
            halon space for proper halon concentration, and to ensure
            compliance with Sprint's fireproofing policy, any penetrations by
            CLEC, whether in the Collocated Space, the building or otherwise,
            shall be sealed as quickly as possible by CLEC with Sprint-approved
            fire barrier sealants, or by Sprint at CLEC's cost.

            2.35 CLEC shall not exceed the uniformly distributed live load
            capacity.

            2.36 CLEC equipment within the Collocated Space shall be connected
            to Sprint's grounding system.

            2.37 CLEC shall post in a prominent location visible from the
            common building area, the telephone numbers of emergency contact
            personnel for 24 hour emergency use by Sprint.   CLEC will promptly
            update this information as changes occur.

            2.38 CLEC shall not paint, display, inscribe or affix any sign,
            trademark, picture, advertising, notice, lettering or direction on
            any part of the outside or inside of the Sprint location, or on the
            Collocated Space, without the prior written consent of Sprint.

            2.39 CLEC shall not use the name of the Sprint building or Sprint
            for any purpose other than that of the business address of CLEC, or
            use any picture or likeness of the Sprint building on any
            letterhead, envelope, circular, notice or advertisement, without
            the prior written consent of Sprint.

            2.40 CLEC shall not exhibit, sell or offer for sale, rent or
            exchange in the Collocated Space or on the Sprint property any
            article, thing or service except those ordinarily embraced within
            the use of the Collocated Space specified in this Attachment V,
            without the prior written consent of Sprint.


<PAGE>   84
            2.41 CLEC shall not place anything or allow anything to be placed
            near the glass of any door, partition or window which Sprint
            determines is unsightly from outside the Collocated Space; take or
            permit to be taken in or out of other entrances of the Sprint
            building, or take or permit to be taken on any passenger elevators,
            any item normally taken through service entrances or elevators; or
            whether temporarily, or accidentally, or otherwise, allow anything
            to remain in, place, or store anything in, or obstruct in any way,
            any passageway, exit, stairway, elevator, or shipping platform.
            CLEC shall lend its full cooperation to keep such areas free from
            all obstruction and in a clean and sightly condition, move all
            supplies, furniture and equipment directly to the Collocated Space
            as soon as received, and move all such items and waste, other than
            waste customarily removed by employees of the building.

            2.42 CLEC shall not do or permit anything to be done upon the
            premises, or bring or keep anything thereon which is in violation
            of any federal, state or local laws or regulations (including
            environmental laws or regulations not previously described), or any
            rules, regulations or requirements of the local fire department,
            Fire Insurance Rating Organization, or any other similar authority
            having jurisdiction over the building.   CLEC shall not do or
            permit anything to be done upon the premises which may in any way
            create a nuisance, disturb, endanger, or otherwise interfere with
            the Telecommunications Services of Sprint, any other occupant of
            the building, their patrons or customers, or the occupants of
            neighboring property, or injure the reputation of the property.

                  2.42.1 CLEC shall not, without the prior written consent of
                  Sprint:   (i) install or operate any lead-acid batteries,
                  refrigerating, heating or air conditioning apparatus or carry
                  on any mechanical business in the premises; (ii) use the
                  premises for housing, lodging, or sleeping purposes; (iii)
                  permit preparation or warming of food, presence of cooking or
                  vending equipment, sale of food or smoking in the premises;
                  or (iv) permit the use of any fermented, intoxicating or
                  alcoholic liquors or substances in the premises or permit the
                  presence of any animals except those used by the visually
                  impaired.   Sprint may, in its sole discretion, withhold such
                  consent, or impose any condition in granting it, and revoke
                  its consent at will.

            2.43 Sprint reserves the right to stop any service when Sprint
            deems such stoppage necessary by reason of accident or emergency,
            or for repairs improvements or otherwise; however, Sprint agrees to
            use its best efforts not to interfere with CLEC's use of the
            Collocation Space.   Sprint does not warrant that any service will
            be free from interruptions caused by


<PAGE>   85


            labor controversies, accidents, inability to obtain fuel, water or
            supplies, governmental regulations, or other causes beyond the
            reasonable control of Sprint.

                  2.43.1 No such interruption of service shall be deemed an
                  eviction or disturbance of CLEC's use of the Collocation
                  Space or any part thereof, or render Sprint liable to CLEC
                  for damages, by abatement of collocation charges, except as
                  set forth in the tariff, or relieve CLEC from performance of
                  its obligations under this Agreement.   CLEC hereby waives
                  and releases all other claims against Sprint for damages for
                  interruption or stoppage of service.

                  2.43.2 Sprint shall have the right to reduce heat, light,
                  water and power as required by any mandatory or voluntary
                  conservation programs.

            2.44 Sprint shall have the following rights, and others not
            specifically excluded in this Agreement, exercisable without notice
            and without liability to CLEC for damage or injury to property,
            person or business (all claims for damage being hereby released),
            and without effecting an eviction or disturbance of CLEC's use or
            possession or giving rise to any claim for offsets, or abatement of
            rent:

                  2.44.1 To change the name or street address of the building;

                  2.44.2 To install and maintain signs on the exterior and
                  interior of the building or anywhere on the property;

                  2.44.3 To designate all sources furnishing sign painting and
                  lettering, ice, mineral or drinking water, beverages, foods,
                  towels, vending machines or toilet supplies used or consumed
                  on the premises;

                  2.44.4 To use any means Sprint may deem proper to open
                  Collocation Space doors in an emergency.   Entry into the
                  Collocation Space obtained by Sprint by any such means shall
                  not be deemed to be forcible or unlawful entry into or a
                  detainment of or an eviction of CLEC from the Collocation
                  Space or any portion thereof;

                  2.44.5 To utilize the space within the building in such a
                  manner as will best enable it to fulfill its own service
                  requirements;

                  2.44.6 At any time, to decorate and to make, at its own
                  expense, repairs, alterations, additions, and improvements,
                  structural or




<PAGE>   86


                  otherwise, in or to the premises, the property, or any part
                  thereof (including, without limitation, the permanent or
                  temporary relocation of any existing facilities such as
                  parking lots or spaces), and to perform any acts related to
                  the safety, protection or preservation thereof, and during
                  such operations to take into and through the premises or any
                  part of the property all material and equipment required, and
                  to close or suspend temporarily operation of entrances,
                  doors, corridors, elevators or other facilities, provided
                  that Sprint shall limit inconvenience or annoyance to CLEC as
                  reasonably possible under the circumstances;

                  2.44.7 To do or permit to be done any work in or about the
                  Collocation Space or the property or any adjacent or nearby
                  building, land, street or alley;

                  2.44.8 To grant to anyone the exclusive right to conduct any
                  business or render any service on the property, provided such
                  exclusive right shall not operate to exclude CLEC from the
                  use expressly permitted by this Agreement;

                  2.44.9 If it becomes necessary in Sprint's reasonable
                  judgment, and there are no other reasonable alternatives, to
                  require CLEC to move to equivalent Collocation Space in the
                  building upon receipt of sixty (60) days written notice from
                  Sprint, in which event, Sprint shall pay all moving costs,
                  and the charges for collocation provided for herein shall
                  remain the same; and

                  2.44.10   To designate all spaces occupied by CLEC's
                  facilities under this Agreement.

            2.45 CLEC shall carry insurance, at CLEC's expense, insuring CLEC
            and, except for worker's compensation, and showing Sprint as
            additional insured and/or loss payee, as its interest may appear.
            Such insurance shall contain such terms and conditions, provide
            such coverages and exclusions and be written by such companies as
            Sprint shall find satisfactory.

                  2.45.1 As of the date that CLEC begins construction of any
                  portion of a physical collocation arrangement or as of the
                  date that CLEC begins to occupy any physical collocation
                  arrangement under this Agreement, whichever is earlier, CLEC
                  shall maintain the following coverages in the following
                  amounts; provided, however, that Sprint retains the right to
                  require additional and/or different coverages and amounts
                  during the term of this Agreement:




<PAGE>   87


                        2.45.1.1 Commercial general liability, occurrence form,
                        in limits of not less than $1,000,000 combined single
                        limit for bodily injury, personal injury and property
                        damage liability insurance to include coverage for
                        products/completed operations and explosion, collapse
                        and underground liability;

                        2.45.1.2 "All Risk" property insurance on a full
                        replacement cost basis, insuring CLEC's real and
                        personal property situated on or within the property.
                        CLEC may elect to insure business interruption and
                        contingent business interruption, as it is agreed that
                        Sprint has no liability for loss of profit or revenues
                        should an interruption of service occur;

                        2.45.1.3 Business auto insurance, including all owned,
                        non-owned and hired automobiles, in an amount of not
                        less than $1,000,000 combined single limit for bodily
                        injury and property damage liability;

                        2.45.1.4 Worker's compensation insurance in accordance
                        with statutory requirements, and employer's liability
                        with a minimum amount of $500,000 per accident; and

                        2.45.1.5 Umbrella or excess liability in an amount not
                        less than $5,000,000 per occurrence and aggregate to
                        provide excess limits over all primary liability
                        coverages.

                  2.45.2 The limits of the insurance policies obtained by CLEC
                  as required above shall in no way limit CLEC's liability to
                  Sprint should CLEC be liable to Sprint under the terms of
                  this Agreement or otherwise.

                  2.45.3 CLEC shall furnish to Sprint a certificate or
                  certificates of insurance, satisfactory in form and content
                  to Sprint, evidencing that the above coverage is in force and
                  has been endorsed and to guarantee that the coverage will not
                  be canceled or materially altered without first giving at
                  least 30 days prior written notice to Sprint.

                  2.45.4 All policies required of CLEC shall contain evidence
                  of the insurer's waiver of the right of subrogation against
                  Sprint for any insured loss covered thereunder.   All
                  policies of insurance shall be written as primary policies
                  and not contributing with or in excess of the coverage, if
                  any, that Sprint may carry.   Any other provisions contained
                  in this Section, this Attachment or this Agreement


<PAGE>   88


                  notwithstanding, the amounts of all insurance required to be
                  obtained by CLEC shall not be less than an amount sufficient
                  to prevent Sprint from becoming a co-insurer.

            2.46 If the premise or a portion thereof sufficient to make the
            premises substantially unusable shall be destroyed or rendered
            unoccupiable by fire or other casualty, Sprint may, at its option,
            restore the premises to its previous condition A license granted
            under this Attachment shall not terminate unless, within 90 days
            after the occurrence of such casualty, Sprint notifies CLEC of its
            election to terminate said license.   If Sprint does not elect to
            terminate said license, Sprint shall repair the damage to the
            premises caused by such casualty.

                  2.46.1 Notwithstanding any other contrary provision of this
                  Agreement, if any casualty is the result of any act, omission
                  or negligence of CLEC, its agents, employees, contractors,
                  licensees, customers or business invitees, unless Sprint
                  otherwise elects, a license for Collocation Space shall not
                  terminate, and, if Sprint elects to make such repairs, CLEC
                  shall reimburse Sprint for the cost of such repairs, or CLEC
                  shall repair such damage, including damage to the building
                  and the area surrounding it, and the charges to be paid to
                  Sprint by CLEC shall not abate.

                  2.46.2 If the building shall be damaged by fire or other
                  casualty to the extent that portions are rendered
                  unoccupiable, notwithstanding that the Collocation Space may
                  be directly unaffected, Sprint may, at its election within 90
                  days of such casualty, terminate a license for Collocation
                  Space by giving written notice of its intent to terminate
                  said license.   The termination as provided in this paragraph
                  shall be effective 30 days after the date of the notice.

                  2.46.3 Notwithstanding any other provision of this Agreement,
                  Sprint shall not be liable for any repair or restoration
                  until, and then only to the extent that, insurance proceeds
                  are received.

            2.47 If the property, or any portion thereof which includes a
            substantial part of the Collocation Space, shall be taken or
            condemned by any competent authority for any public use or purpose,
            the term of a Collocation Space license shall end upon, and not
            before, the date when the possession of the part so taken shall be
            required for such use or purpose.   If any condemnation proceeding
            shall be instituted in which it is sought to take or damage any
            part of the property, or if the grade of any street or alley
            adjacent to the property is changed by any competent authority and
            such change of grade makes it necessary or desirable to


<PAGE>   89


            remodel the property to conform to the changed grade, Sprint shall
            have the right to terminate a Collocation Space license upon not
            less than 30 days notice prior to the date of cancellation
            designated in the notice.   No money or other consideration shall
            be payable by Sprint to CLEC for such cancellation, and CLEC shall
            have no right to share in the condemnation award or in any judgment
            for damages caused by such eminent domain proceedings.

            2.48 At the termination of a Collocation Space license by lapse of
            time or otherwise:

                  2.48.1 CLEC shall surrender all keys, access cards and
                  Sprint-provided photo identification cards to the Collocation
                  Space and the building to Sprint, and shall make known to
                  Sprint the combination of all combination locks remaining on
                  the Collocation Space.

                  2.48.2 CLEC shall remove its equipment from the Collocation
                  Space within thirty (30) days.

                  2.48.3 CLEC shall return to Sprint the Collocation Space and
                  all equipment and fixtures of Sprint in as good a condition
                  and state of repair as when CLEC originally took possession,
                  normal wear and tear or damage by fire or other casualty
                  excepted.   CLEC shall be responsible to Sprint for the cost
                  of any repairs that shall be made necessary by the acts or
                  omissions of CLEC or of its agents, employees, contractors or
                  business invitees.   Sprint reserves the right to oversee
                  CLEC's withdrawal from the Collocation Space and CLEC agrees
                  to comply with all directives of Sprint regarding the removal
                  of equipment and restoration of the Collocation Space,
                  including, without limitation, Sprint's directive to return
                  the Collocation Space in other than its original condition on
                  the date of occupancy; provided, however, that CLEC shall not
                  be responsible for putting the Collocation Space in other
                  than its original condition if to do so would put CLEC to
                  additional expense above and beyond that which would be
                  necessary to return the Collocation Space in its original
                  condition,

                  2.48.4 All installations, additions, hardware, non-trade
                  fixtures and improvements, temporary or permanent, except
                  movable furniture and equipment belonging to CLEC, in or upon
                  the Collocation Space, whether placed there by CLEC or
                  Sprint, shall be Sprint's property and shall remain upon or
                  in the Collocation Space, all without compensation, allowance
                  or credit to CLEC; provided, however, that if prior to such
                  termination or within ten


<PAGE>   90


                  (10) days thereafter, Sprint so directs, CLEC shall promptly
                  remove the installations, additions, hardware, non-trade
                  fixtures and improvements, placed in or upon the Collocation
                  Space by CLEC, failing which Sprint may remove the same, and
                  CLEC shall, upon demand, pay to Sprint the cost of such
                  removal and of any necessary restoration of the Collocation
                  Space.   No cable shall be removed from inner duct or outside
                  cable duct except as directed by Sprint.

                  2.48.5 All fixtures, installations, and personal property
                  belonging to CLEC not removed from the Collocation Space upon
                  termination of a Collocation Space license and not required
                  by Sprint to have been removed as provided in this Attachment
                  V, shall be conclusively presumed to have been abandoned by
                  CLEC and title thereto shall pass to Sprint under this
                  Attachment V as if by a bill of sale.

                  2.48.6 If the Collocation Space is not surrendered at the
                  termination of the Collocation Space license, CLEC shall
                  indemnify Sprint against loss or liability resulting from
                  delay by CLEC in so surrendering the Collocation Space,
                  including, without limitation, any claims made by any
                  succeeding tenant founded on such delay.

            2.49 If the owner of the building or Sprint sells, transfers or
            assigns any interest in the building, or there is any material
            change in the lease to which the building is subject, and such
            sale, transfer, assignment or material change in the lease gives
            rise to an obligation which is inconsistent with a Collocation
            Space license granted under this Attachment V, Sprint's performance
            under this Attachment V shall be excused to the extent of the
            inconsistency.   Sprint hereby agrees that it will use its
            reasonable efforts to avoid any such inconsistency; provided,
            however, that this obligation shall in no way obligate Sprint to
            incur any out of pocket expenses in its efforts to avoid such
            inconsistencies.

            2.50 A Collocation Space license granted under this Attachment V
            shall at all times be subject and subordinate to the lien of any
            mortgage (which term shall include all security instruments) that
            may be placed on the premises, building or any portion thereof and
            CLEC agrees, upon demand, to execute any instrument as may be
            required to effectuate such subordination.

SECTION 3. PHYSICAL SECURITY

            3.1 Each party shall exercise the same degree of care [but not less
            than reasonable] to prevent harm or damage to the other party or
            its


<PAGE>   91


            employees, agents or subscribers, or their property.   Sprint and
            its employees, agents or representatives shall take reasonable and
            prudent steps to ensure the adequate protection of CLEC property,
            equipment and services including, but not limited to:

                  3.1.1 Restricting access to CLEC equipment, support
                  equipment, systems, tools, or spaces which contain or house
                  CLEC equipment enclosures to CLEC employees and other
                  authorized non-CLEC personnel to the extent necessary to
                  perform their specific job function.

                  3.1.2 CLEC shall provide a written logbook for Sprint's
                  employees to sign when entering CLEC's physical Collocation
                  Space which houses or contains CLEC equipment or equipment
                  enclosures.

                  3.1.3 When Sprint's employees enter CLEC's physical
                  Collocation Space, Sprint's employees shall comply at all
                  times with CLEC security and safety procedures and
                  requirements, including but not limited to sign-in,
                  identification, and escort requirements while in CLEC's
                  physical Collocation Spaces which house or contain CLEC
                  equipment or equipment enclosures and in compliance with
                  Appendix___ hereto.   In the event any issues or problems
                  arise under this Section 3.1 the parties agree to negotiate a
                  reasonable resolution to such issue or problem.

                  3.1.4 Ensuring that the physical collocation area which
                  houses CLEC's equipment is adequately secured and monitored
                  to prevent unauthorized entry to the same extent and at the
                  same level Sprint provides itself.

                  3.1.5 Subject to Section 2.3 of this Attachment V, allowing
                  CLEC to inspect or observe spaces which house or contain CLEC
                  equipment or equipment enclosures at any time and to furnish
                  CLEC with all keys, entry codes, lock combinations, or other
                  materials or information which may be needed to gain entry
                  into any secured CLEC space.

                  3.1.6 Limiting the keys used in its keying systems for CLEC's
                  physical Collocation Spaces which contains or houses CLEC
                  equipment or equipment enclosures to Sprint employees and
                  representatives to emergency access only.   CLEC shall
                  further have the right to change locks where deemed necessary
                  for the protection and security of such spaces.



<PAGE>   92


                  3.1.7 Upon CLEC's request, installing security studs in the
                  hinge plates of doors having exposed hinges with removable
                  pins if such leads to CLEC's physical Collocation Space which
                  contains or houses CLEC equipment or equipment enclosures.

                  3.1.8 Controlling unauthorized access from passenger and
                  freight elevators by continuous surveillance or by personnel
                  security escort, installing security partitions, security
                  grills, locked gates or doors between elevator lobbies and
                  spaces which contain or house CLEC equipment or equipment
                  enclosures.

                  3.1.9 Providing real time notification to designated CLEC
                  personnel to indicate an actual or attempted security breach.

                  3.1.10 Subject to the provisions of Sections 2.9, 2.9.1 and
                  2.9.2 above, ensuring that areas designated to house CLEC
                  equipment are environmentally appropriate for the CLEC
                  equipment installation, and adequate to maintain proper
                  operating conditions for the CLEC equipment.

            3.2 Sprint, at CLEC's expense, may issue non-employee photo
            identification cards for each CLEC employee or vendor.   Temporary
            identification cards may otherwise be provided by Sprint for
            employees or agents, contractors and invitees of CLEC who may
            require occasional access to the Collocated Space.

            3.3 Sprint may issue access cards, codes, or keys to CLEC's listed
            employees or vendors where such systems are available and their use
            by CLEC will not otherwise compromise building security.

            3.4 Sprint reserves the right to close and keep locked all entrance
            and exit doors of the building during hours Sprint may deem
            advisable for the adequate protection of the building.

            3.5 CLEC agrees to abide by all of Sprint's security practices for
            non-Sprint employees with access to the building, including,
            without limitation:

                  3.5.1 CLEC will supply to Sprint, and update as changes
                  occur, a list of its employees or approved vendors who
                  require access to the building.   The list will include the
                  social security numbers of all such individuals.

                  3.5.2 CLEC is responsible for returning identification and
                  access cards, codes, or keys of its terminated employees or
                  its employees who no longer require access to the Collocated
                  Space.   All cards,


<PAGE>   93


                  codes, or keys must be returned upon termination of this
                  Agreement.   Unreturned or replacement cards, codes, or keys
                  may be subject to a reasonable fee at the discretion of
                  Sprint.

                  3.5.3 CLEC's employees, agents, invitees and vendors must
                  display identification cards at all times.

                  3.5.4 CLEC will assist Sprint in validation and verification
                  of identification of its employees, agents, invitees and
                  vendors by providing a telephone contact available 24 hours a
                  day, seven days a week to verify identification.

                  3.5.5 Before leaving the Collocated Space unattended, CLEC
                  shall close and securely lock all doors and windows and shut
                  off unnecessary equipment in the Collocated Space.   Any
                  damage resulting from CLEC's failure to do so shall be the
                  responsibility of CLEC.

            3.6 CLEC will allow Sprint to access its Collocated Space at all
            times, via pass key or otherwise, to allow Sprint to react to
            emergencies, to maintain the space (not including CLEC equipment),
            and to monitor compliance with the rules and regulations of the
            Occupational Health and Safety Administration or Sprint, or other
            regulations and standards including but not limited to those
            related to fire, safety, health, and environmental safeguards.
            Except in emergencies or unless CLEC has waived such notice
            elsewhere in this Attachment V, and if conditions permit, Sprint
            will provide CLEC with notice of its intent to access the
            Collocated Space, thereby providing CLEC the option to be present
            at the time of access.   CLEC shall not attach, or permit to be
            attached, additional locks or similar devices to any door or
            window, nor change existing locks or the mechanism thereof.

SECTION 4. LICENSE

            Sprint hereby grants CLEC a license to occupy any premises or rack
            space which contain collocated equipment, including without limit
            all necessary ingress, egress and reasonable use of Sprint's
            property, for the Term of the Agreement.

SECTION 5.  TECHNICAL REFERENCES
            Sprint shall provide collocation in accordance with the following 
            standards:


<PAGE>   94

            5.1 National Electrical Code (NEC) use latest issue.


            5.2 TA-NPL-000286, NEBS Generic Engineering Requirements for System
            Assembly and Cable Distribution, Issue 2, (Bellcore, January 1989).

            5.3 TR-EOP-000063 Network Equipment Building System (NEBS) Generic
            Equipment Requirements, Issue 3, March 1988.

            5.4 TR-EOP-000151, Generic Requirements for 24-, 48-, 130-, and
            140- Volt Central Office Power Plant Rectifiers, Issue 1,
            (Bellcore, May 1985).

            5.5 TR-EOP-000232, Generic Requirements for Lead-Acid Storage
            Batteries, Issue 1 (Bellcore, June 1985).

            5.6 TR-NWT-000154, Generic Requirements for 24-, 48-, 130, and 140-
            Volt Central Office Power Plant Control and Distribution Equipment,
            Issue 2, (Bellcore, January 1992).

            5.7 TR-NWT-000295, Isolated Ground Planes:   Definition and
            Application to Telephone Central Offices, Issue 2, (Bellcore, July
            1992).

            5.8 TR-NWT-000840, Supplier Support Generic Requirements (SSGR), (A
            Module of LSSGR, FR-NWT-000064), Issue 1, (Bellcore, December
            1991).

            5.9 TR-NWT-001275 Central Office Environment Installations/Removal
            Generic Requirements, Issue 1, January 1993.



<PAGE>   95


                         PART C - ATTACHMENT VI

           RIGHTS OF WAY (ROW), CONDUITS,   POLE ATTACHMENTS

SECTION 1. INTRODUCTION

            This attachment sets forth the requirements for Rights of Way,
            Conduits and Pole Attachments.

SECTION 2. DEFINITIONS

            2.1 An "anchor" refers to a device, structure, or assembly which
            stabilizes a Pole and holds it in place.   An anchor assembly may
            consist of a rod and fixed object or plate, typically embedded in
            the ground, which is attached to a guy strand or guy wire, which,
            in turn, is attached to the Pole.   The term "anchor" does not
            include the guy strand which connects the anchor to the Pole.

            2.2 An "Attachment" is any placement of CLEC's facilities in or on
            Sprint's Poles, ducts, conduits, or Right of Way.

            2.3 A "conduit" is a tube or protected trough that may be used to
            house communication cables.   Conduit may be underground or above
            ground (for example, inside buildings) and may contain one or more
            inner ducts.

            2.4 A "conduit system" is any combination of ducts, conduits,
            manholes and handholes joined to form an integrated whole.
            Conduit systems may pass through or originate in or terminate in
            other facilities which may be physically connected to the conduit
            system .

            2.5 A "duct" is a single enclosed path to house facilities to
            provide Telecommunications Services.

            2.6 The terms "facility" and "facilities" refers to any property,
            equipment, or items owned or controlled by any person or entity.
            The terms "facility" and "facilities" include, but are not limited
            to, Poles, anchors, Pole hardware, wires, cables, strands,
            apparatus enclosures, or any other items attached to a Pole or
            attached to hardware affixed to or associated with a Pole; conduit
            and conduit systems and wires, cables, optical conductors,
            associated hardware, or other equipment located within a Conduit
            System.   The terms "facility" and "facilities" may also include
            property, equipment, and items which do not occupy a conduit system
            or which are not attached to a Pole or attached to hardware affixed
            to or associated with a Pole.




<PAGE>   96


            2.7 An "inner duct" is one of the single enclosed pathways located
            within a duct, or buried separately without the benefit of a
            conduit.

            2.8 The term "Make Ready Work" refers to all work performed or to
            be performed to prepare Sprint's Poles, Ducts, Conduits or other
            Right of Way for the requested occupancy or attachment of CLEC's
            facilities.   "Make ready work" includes, but is not limited to,
            clearing obstructions, the rearrangement, transfer, replacement,
            and removal of existing facilities on a Pole or in a conduit system
            where such work is required solely to accommodate CLEC's
            facilities.   "Make ready work" may include the repair, or
            modification of Sprint's facilities (including, but not limited to,
            conduits, ducts, or manholes) or the performance of other work
            required to make a Pole, conduit or duct usable for the placement
            of CLEC's facilities.

            2.9 A "manhole" is a subsurface enclosure that personnel may enter
            and use for the purpose of installing, operating, maintaining, and
            repairing communications facilities.

            2.10 A "handhole" is a subsurface enclosure that is too small for
            personnel to enter and is used for the purpose of installing,
            operating, maintaining, and repairing communications facilities.

            2.11 A "Pole" refers to Sprint Poles and anchors and does not
            include poles or anchors with respect to which Sprint has no legal
            authority to permit attachments by other persons or entities.

            2.12 A "Pole attachment" is the connection of a facility to a Pole.
            Some examples of such facilities are mechanical hardware,
            grounding and transmission cable, and equipment boxes.

            2.13 A "Right of Way" ("ROW") is the right to use the land or other
            property of another party to place poles, conduits, cables, or
            other structures and equipment, or to provide passage to access
            such structures and equipment for the purpose of providing
            Telecommunications Services.   A ROW may run under, on, or above
            public or private property (including air space above public or
            private property) and may include the right to use discrete space
            in buildings, building complexes, or other locations.


<PAGE>   97



SECTION 3.REQUIREMENTS
     3.1          General

                  3.1.1 Sprint shall make Poles, ducts, conduits, conduit
                  systems, and other ROW available to CLEC for Attachments
                  under the terms and conditions set forth in this Section 3.

                  3.1.2 Sprint shall provide CLEC equal and non-discriminatory
                  access to Poles, ducts, conduits, and other ROW, it owns or
                  controls.   Such access shall be provided on terms and
                  conditions equal to that provided by Sprint to itself or to
                  any other party consistent with Section 224 of the Act.
                  Further, Sprint shall not preclude or delay allocation of
                  these facilities to CLEC because of the potential needs of
                  itself or of other parties, except for work in progress,
                  which may be retained for Sprint facilities deployment within
                  three hundred sixty-five (365) calendar days of the date of
                  the formal CLEC request.

                  3.1.3 Each of the parties shall designate to the other, on
                  the basis of specific operating regions, single points of
                  contact for negotiating all issues relating to implementation
                  of this Section 3.   The single points of contact shall also
                  be the contacts for all notices and demands, offers and
                  acceptances under this Section 3, unless otherwise agreed in
                  writing by the parties.

                  3.1.4 Excepting work in progress as described above, and
                  maintenance and emergency ducts as provided below, all usable
                  but unassigned space on Poles, or in ducts, conduits, or
                  other ROW owned or controlled by Sprint shall be available
                  for the attachments of CLEC, Sprint or other providers of
                  Telecommunications Services or cable television systems.
                  Sprint may reserve for emergency and maintenance purposes one
                  duct in each conduit section of its facility routes.   Such
                  duct shall be equally accessible and available by any party
                  with facilities in such conduit section to use to maintain
                  its facilities or to restore them in an emergency.

                  3.1.5 All CLEC facilities placed in or upon Sprint ROW shall
                  be clearly tagged or labeled with CLEC ownership
                  identification so that it may be readily identified by Sprint
                  or its contractors as CLEC facilities.

                  3.1.6 Access to Sprint Poles, ducts, conduits or other ROW by
                  CLEC or its designated personnel or contractors shall be
                  provided


<PAGE>   98


                  on an escorted basis and upon a reasonable request for access
                  to such Poles, ducts, conduits or other ROW.   CLEC shall pay
                  for one access escort based on an hourly rate of the
                  appropriate level of escorting personnel as determined by
                  Sprint, unless Sprint and CLEC have reached agreement that no
                  escort is necessary, which may be negotiated on a case by
                  case basis.   Such escort service shall be available on a
                  reasonable basis 24 hours per day.

     3.2 Pre-Ordering Disclosure Requirements

                  3.2.1 CLEC may request information regarding the availability
                  and conditions of Poles, ducts, conduits and other ROW prior
                  to the submission of Attachment Requests (as defined below).
                  Sprint shall provide information regarding the availability
                  and condition of Sprint's Poles, ducts, conduits or other ROW
                  for Attachments within fifteen (15) business days of a
                  request.   If it is unable to inform CLEC about availability
                  and conditions within such fifteen-day interval, Sprint shall
                  advise CLEC within ten (10) business days after receipt of
                  CLEC's information request and will seek a mutually
                  satisfactory time period for Sprint's response, which in no
                  event shall exceed thirty (30) calendar days.   If Sprint's
                  response requires a field-based survey, CLEC shall have the
                  option to be present at the field-based survey and Sprint
                  shall provide CLEC at least two (2) calendar days notice
                  prior to the start of such field survey.   During and after
                  the field based survey, Sprint shall allow CLEC personnel
                  (with Sprint escort) to enter manholes and view Pole
                  structures to inspect such structures in order to confirm
                  usability or assess the condition of the structure.

                  3.2.2 Sprint shall make existing route maps of Poles, ducts,
                  conduits or other Right of Way available to CLEC, at a city
                  level, at Sprint's facilities within two (2) business days
                  and if such maps need to be generated, within ten (10)
                  business days of CLEC's request.  Preparation of such maps
                  requested by CLEC shall be accommodated by Sprint on a
                  reasonable basis and at CLEC's expense, plus a reasonable
                  administrative fee.   In making these maps and drawings
                  available, Sprint makes no express or implied warranty as to
                  the accuracy of these maps and drawings, except that they
                  reflect the equivalent accuracy and timeliness of information
                  used by Sprint in its operations.

                  3.2.3 Sprint shall invoice CLEC an administrative fee equal
                  to one hundred percent (100%) of the direct cost of providing
                  maps and drawings, in addition to the direct cost of copying
                  any requested maps or drawings.



<PAGE>   99


     3.3 Attachment Requests

                  3.3.1 Sprint agrees to permit CLEC to place CLEC's facilities
                  on or in Sprint's Poles, ducts, conduits, and other ROW
                  pursuant to Attachment requests from CLEC approved in
                  accordance with this Section 3.3, on the terms and conditions
                  set forth herein and in the "Attachment Request".

                  3.3.2 At any time after the Approval Date, CLEC may submit a
                  written Attachment Request, in a form to be designated by
                  Sprint, to Sprint.   An Attachment Request shall be deemed
                  properly submitted if it identifies with specificity the
                  Sprint Poles, ducts, conduits, or other ROW for which CLEC
                  seeks Attachment.   Sprint shall approve any properly
                  submitted Attachment Request within ten (10) business days,
                  if the space has previously been determined to be available
                  under the procedures set forth in Section 3.2.1 of this
                  Attachment VI above.   No Attachments shall be placed on any
                  Sprint Pole identified in an Attachment Request until the
                  Attachment Request has been approved by Sprint.   CLEC may
                  submit subsequent Attachment Requests as needed.   CLEC shall
                  have fourteen (14) calendar days after Sprint's return of the
                  approved Attachment Request to CLEC to execute the Attachment
                  Request and return the same to Sprint.   If CLEC does not
                  return the Attachment Request within the fourteen (14)
                  calendar day interval specified above, then such request
                  shall be null and void and such ROW shall become immediately
                  available to other parties.   The approved Attachment Request
                  shall serve as the binding attachment contract between the
                  parties.

                  3.3.3 Together with Sprint's notice of approval of an
                  Attachment Request submitted by CLEC, Sprint shall also
                  provide an estimate of the Make Ready Work costs associated
                  with making the space available for CLEC's Attachment.
                  Sprint shall complete any Make Ready Work required to enable
                  CLEC to install its facilities at both a reasonable cost and
                  within a reasonable time, both of which shall be agreed upon
                  by Sprint and CLEC.   If such agreement does not occur within
                  ten (10) calendar days of Sprint's provision of a quote for
                  such work or CLEC determines the quote is too high, CLEC may
                  complete Make Ready Work on its own or hire outside
                  contractors to do the work at CLEC's expense.   Any
                  contractors hired by CLEC pursuant to this Section 3 shall
                  meet Sprint's reasonable standards, which shall not exceed
                  the equivalent personnel qualifications of Sprint personnel
                  performing the same task.   Sprint shall provide a security
                  escort for CLEC and CLEC


<PAGE>   100


                  contractor and CLEC shall pay for such escort based on an
                  hourly rate.   Where CLEC submits an Attachment Request and
                  subsequently fails to return an executed Attachment Request
                  within fourteen calendar (14) days of Sprint's notice of
                  approval, CLEC shall reimburse Sprint for its reasonable cost
                  to provide pre-ordering information and any site survey work
                  and the Attachment Request shall become null and void.   Upon
                  acceptance of an approved Attachment Request by CLEC and its
                  return to Sprint, Sprint shall bill CLEC for any Make Ready
                  Work non-recurring charges, if Sprint is to perform the Make
                  Ready Work.   Upon completion of any required Make Ready Work
                  by Sprint or upon receipt of the approved Application Request
                  by Sprint, whichever is later, written notice shall be
                  provided to CLEC granting access to the ROW and advising CLEC
                  of the date that monthly billing for such ROW shall commence.
                  CLEC shall have one hundred eighty (180) calendar days to
                  begin attachment and/or installation of its facilities after
                  receipt of such notice.   Any such construction shall be
                  completed by the end of three hundred sixty-five (365)
                  calendar days after receipt of such notice, unless CLEC
                  notifies Sprint differently and Sprint agrees to such delay.
                  CLEC notification to Sprint shall be provided at least sixty
                  (60) calendar days prior to the expiration of the three
                  hundred sixty-five (365) calendar day period.   If CLEC does
                  not begin construction within this time frame, Sprint will
                  cease monthly billing to CLEC and the access to the ROW and
                  the Attachment Request shall be deemed null and void.

                  3.3.4 Sprint shall make space available to CLEC as soon as
                  any Make Ready Work to be provided by Sprint, as described in
                  Section 3.3.3, is completed.   At that time, CLEC shall have
                  the right, subject to the terms and conditions of this
                  Agreement, to place and maintain the facilities described in
                  the Attachment Request in the space designated on or in
                  Sprint's Poles, ducts, conduits, and other ROW identified
                  therein.   CLEC may, at its option, use CLEC or
                  CLEC-designated personnel, which CLEC shall identify to
                  Sprint prior to beginning construction, to attach its
                  equipment to Sprint structures, subject to Sprint's agreement
                  with the proposed construction methods proposed by CLEC to
                  perform such work.   Sprint shall provide a security escort
                  to accompany CLEC or its contractors and CLEC shall pay for
                  same based on an hourly rate.   Sprint may stop CLEC or its
                  contractors' construction activities if the same is not
                  performed in accordance with the approved methods.   Any such
                  approval shall not be unreasonably withheld, delayed or
                  denied.   Sprint may require dismissal of the CLEC or
                  CLEC-designated personnel in the event Sprint


<PAGE>   101


                  reasonably believes such personnel are not properly
                  performing construction hereunder.

                  3.3.5 If Sprint performs the Make Ready Work specified by
                  Section 3.3.3, CLEC agrees to pay Sprint the Make Ready Work
                  costs within sixty (60) business days of receiving Sprint's
                  invoice.

                  3.3.6 Sprint will provide CLEC with answers to an
                  environmental, health and safety questionnaire for each
                  Sprint facility in or on which CLEC seeks an Attachment.
                  CLEC may provide this questionnaire with its Attachment
                  Request and Sprint shall return it to CLEC with the approval
                  of CLEC's Attachment Request.

     3.4 Authority to Place Attachments

                  3.4.1 Before CLEC places any Attachment pursuant to an
                  approved Attachment Request, CLEC shall submit evidence of
                  its authority to erect and maintain the facilities to be
                  placed on Sprint's facilities within the public streets,
                  highways and other thoroughfares or on private property,
                  where such additional authority is required by law.   CLEC
                  shall be solely responsible for obtaining all necessary
                  licenses, authorizations, permits, and consents from federal,
                  state and municipal authorities that may be required to place
                  Attachments on Sprint's facilities.

                  3.4.2 Sprint shall not unreasonably intervene against or
                  attempt to delay the granting of any necessary licenses,
                  authorizations, permits or consents from federal, state and
                  municipal authorities or private property owners that may be
                  required for CLEC to place its Attachments on or in any
                  Poles, ducts, conduits, or other ROW that Sprint owns or
                  controls.

                  3.4.3 If any license, authorization, permit or consent
                  obtained by CLEC is subsequently revoked or denied for any
                  reason, permission to attach to Sprint's facilities shall
                  terminate immediately and CLEC shall remove its Attachments
                  (if any) within one hundred twenty (120) calendar days.
                  CLEC may, at its option, litigate or appeal any such
                  revocation or denial and if CLEC is diligently pursuing such
                  litigation or appeal, CLEC may continue to maintain its
                  Attachment.   In doing so, CLEC agrees to indemnify Sprint
                  from and against any and all costs resulting from Sprint's
                  continuation of the Attachment which is the subject of such
                  litigation or appeal.


<PAGE>   102


     3.5 Capacity

                  3.5.1 When there is insufficient space on a Pole or in a
                  Sprint conduit to accommodate an CLEC-requested Attachment or
                  occupancy, Sprint shall, at CLEC's option:   (1 ) replace the
                  Pole or conduit with one of greater height or capacity; or
                  (2) permit CLEC to replace the Pole or conduit with a
                  Sprint-furnished Pole or conduit of greater height or
                  capacity, or (3) place additional Poles or conduits in the
                  ROW.   CLEC shall be obligated to reimburse Sprint for its
                  proportionate share of the actual costs incurred.

                  3.5.2 Sprint shall permit CLEC to break out of Sprint conduit
                  and to maintain facilities within conduit space used by CLEC
                  and, where required by Sprint, shall provide CLEC designated
                  personnel with one escort and CLEC shall pay for such escort
                  based on an hourly rate.   Such escort service shall be
                  available twenty-four (24) hours per day each day of the
                  week.

                  3.5.3 Sprint shall permit manhole interconnections and
                  breaking out of Sprint manholes and shall provide CLEC with
                  sufficient space in manholes for the racking and storage of
                  cable and other materials as requested by CLEC.   Sprint
                  reserves the right to deny nonstandard requests to break out
                  of manholes where the location in which CLEC wants to break
                  out is blocked by a cable rack.

                  3.5.4 Sprint shall take all reasonable measures to allow
                  access and/or egress to all conduit systems.   This shall
                  include but not be limited to Sprint's removal, upon CLEC's
                  request, of any retired cable for conduit systems to allow
                  for the efficient use of conduit space within a reasonable
                  period of time.   If the parties are unable to agree on what
                  is reasonable (in terms of measures or time intervals), the
                  matter may be submitted in accordance with the Dispute
                  Resolution Procedures, described in Part A of this Agreement,
                  by either party.

                  3.5.5 Where a spare inner duct does not exist, Sprint shall
                  allow installation of an inner duct in a spare Sprint
                  conduit.   The procedure set forth in Section 3.3.3 shall
                  govern such installation.

                  3.5.6 Neither party shall attach, or permit other entities to
                  attach facilities on existing facilities of the other without
                  the other party's prior written consent.   Such consent will
                  not be unreasonably withheld if the requested use is to
                  facilitate use of the ROW by Sprint or any other party on a
                  temporary basis until such reasonable time as the ROW can be
                  expanded.


<PAGE>   103


                  3.5.7 CLEC acknowledges that, from time to time, it may be
                  necessary or desirable for Sprint to change out Poles,
                  relocate, reconstruct, or modify portions of its conduit
                  system or rearrange facilities contained therein or connected
                  thereto and that such changes may be necessitated by Sprint's
                  business needs or by factors outside of Sprint's control,
                  such as the decision by a municipality to widen streets or
                  authorized application of another entity seeking access to
                  Sprint's Poles or conduit systems.  CLEC agrees that CLEC
                  will, upon Sprint's request and at Sprint's expense, but at
                  no cost to CLEC so long as no additional cost is incurred by
                  Sprint as a result of CLEC being attached, participate with
                  Sprint (and other licensees) in the relocation,
                  reconstruction, or modification of Sprint's conduit system or
                  facilities rearrangement.

            3.6 Sharing of Right of Way

                  3.6.1 Sprint shall offer the use of such ROW it has obtained
                  from a third party to CLEC, to the extent that Sprint's
                  agreement with the third party explicitly permits Sprint to
                  grant such rights to CLEC.   If said third party agreement
                  does not explicitly permit Sprint to grant such rights to
                  CLEC, Sprint will, upon CLEC's request, grant said rights to
                  CLEC provided that CLEC agrees, in writing, to indemnify,
                  defend and hold Sprint harmless from and against any loss,
                  cost, claim, liability, damage and expense (including
                  reasonable attorney fees) to third parties relating to or
                  arising out of the grant of such right of use to CLEC.

            3.7 Emergency Situations

                  3.7.1 Within fifteen (15) business days after the Approval
                  Date, Sprint and CLEC shall mutually agree on a
                  non-discriminatory priority method to access Sprint manholes
                  and conduits in emergency situations.

            3.8 Attachment Fees

                  3.8.1 CLEC shall pay Sprint an Attachment fee consistent with
                  the Act, the FCC's implementing rules and regulations
                  promulgated thereunder, and/or any relevant state commission
                  order, for each Sprint facility upon which CLEC obtains
                  authorization to place an Attachment.   The parties agree
                  that any new FCC rules and regulations setting forth a new
                  methodology for determining the


<PAGE>   104


                  Attachment fee shall govern the establishment of the pricing
                  of Attachments.

                  3.8.2 Sprint shall maintain an inventory of the Sprint
                  facilities occupied by CLEC based upon the cumulative
                  facilities specified in all Attachment Requests approved in
                  accordance with Section 3.3.   CLEC shall provide Sprint with
                  "as built" drawing after each Attachment is completed.   CLEC
                  shall have the right to remove any Attachment at any time,
                  and it shall be CLEC's sole responsibility to notify Sprint
                  of any and all removals by CLEC of its Attachments from
                  Sprint's facilities.   Such notice shall be provided to
                  Sprint at least thirty (30) calendar days prior to the
                  removal of the Attachment and shall take the form of a notice
                  of removal.   CLEC shall remain liable for an Attachment fee
                  for each Sprint facility included in all approved Attachment
                  Requests until a notice of removal has been received by
                  Sprint or CLEC cancels an Attachment pursuant to Section
                  3.13.   Sprint may, at its option, conduct a physical
                  inventory of the Attachments for purposes of determining the
                  Attachment fees to be paid by CLEC under this Section 3.

            3.9 Additions and Modifications to Existing Attachments

                  3.9.1 CLEC shall not modify, add to or replace facilities on
                  any pre-existing Attachment without first notifying Sprint in
                  writing of the intended modification, addition or replacement
                  at least thirty (30) calendar days prior to the date the
                  activity is scheduled to begin.   The required notification
                  shall include:  (1) identification of the impacted
                  Attachment, (2) the date the activity is scheduled to begin,
                  (3) a description of the planned modification, addition or
                  replacement, (4) a representation that the modification,
                  addition or replacement will not require any space other than
                  the space previously designated for CLEC's Attachments, and
                  (5) a representation the modification, addition or
                  replacement will not impair the structural integrity of the
                  facilities involved.

                  3.9.2 If the modification, addition or replacement specified
                  by CLEC in its notice will require more space than that
                  currently allocated to CLEC or will require the reinforcement
                  of replacement of or an addition of support equipment to the
                  facilities involved in order to accommodate CLEC's
                  modification, addition or replacement, CLEC will submit an
                  Attachment Request in compliance with Section 3.3 in order to
                  obtain authorization for the modification, addition or
                  replacement of its facilities.



<PAGE>   105


            3.10 Noncompliance

                  3.10.1 If, at any time, Sprint determines that CLEC's
                  facilities or any part thereof have not been placed or
                  maintained or are not being used in accordance with the
                  requirements of this Section 3, Sprint may send written
                  notice to CLEC specifying the alleged noncompliance.   If
                  CLEC does not dispute Sprint's assertion in writing within
                  thirty (30) calendar days of receipt thereof, CLEC will,
                  within sixty (60) calendar days of receipt of the notice of
                  noncompliance, provide Sprint with a schedule for bringing
                  CLEC's facilities into compliance (which schedule shall be
                  subject to Sprint's agreement, which agreement shall not be
                  unreasonably withheld) and shall bring such facilities into
                  compliance within the time periods specified in such
                  schedule.

                  3.10.2 If CLEC disputes Sprint's assertion of noncompliance,
                  CLEC shall notify Sprint of the basis of CLEC's belief that
                  CLEC's facilities are compliant.   If the parties are unable
                  to agree on whether a noncompliance exists within thirty (30)
                  calendar days of receipt of the noncompliance notice by CLEC,
                  then the issue shall be resolved pursuant to the Dispute
                  Resolution Procedures set forth in Part A of this Agreement.

            3.11 Surveys and Inspections of Attachments

                  3.11.1 The exact location of Attachments on or in Sprint's
                  facilities may be determined through a survey (at Sprint's
                  expense) to be made not more than once per calendar year by
                  Sprint.   If so requested, CLEC and/or any other entity
                  owning or jointly owning the facilities with Sprint may
                  participate in the survey.

                  3.11.2 Apart from surveys conducted in accordance with
                  Section 3.11.1 above, Sprint shall have the right to inspect
                  (at Sprint's expense) any Attachment on or in Sprint's
                  facilities as conditions may warrant upon written notice to
                  CLEC.   No joint survey or inspection by Sprint shall operate
                  to relieve CLEC of any responsibility, obligation or
                  liability assumed under this Agreement.

            3.12 Notice of Modification or Alteration of Poles,
                 Ducts, Conduits, or Other ROW by Sprint

                  3.12.1 If Sprint plans to modify or alter any Sprint
                  facilities upon which CLEC has Attachments, Sprint shall
                  provide CLEC notice of


<PAGE>   106


                  the proposed modification or alteration at least sixty (60)
                  calendar days prior to the time the proposed modification or
                  alteration is scheduled to take place.   If CLEC decides not
                  to modify or add to its existing Attachment, CLEC shall
                  participate at no cost in such modification and
                  rearrangement.   If CLEC adds to or modifies its facilities
                  CLEC shall be charged its proportionate share of the
                  reasonable costs incurred by Sprint for such modification or
                  rearrangement.   CLEC shall make all rearrangements of its
                  facilities within such period of time, which shall not be
                  less than sixty (60) calendar days, as is jointly determined
                  to be reasonable by the parties based on the amount of
                  rearrangements necessary and a desire to minimize chances for
                  service interruption or facility-based service denial to an
                  CLEC customer.

            3.13 Termination of Section 3 or An Individual Attachment by CLEC

                  3.13.1 This Section 3 may be terminated by CLEC any time
                  prior to the expiration of its term by providing written
                  notice to Sprint of its intent to terminate not less than
                  ninety (90) calendar days prior to the date such termination
                  is to become effective.   Within one hundred twenty (120)
                  calendar days after the date this Section 3 is terminated,
                  CLEC shall cause all of its Attachments to be removed from
                  all of Sprint's Poles.   In the event CLEC fails to remove
                  its Attachments as required by this Section 3, Sprint shall
                  have the option to remove all such Attachments and store them
                  in a public warehouse or elsewhere at the expense of and for
                  the account of CLEC without Sprint being deemed guilty of
                  trespass or conversion, and without Sprint becoming liable
                  for any loss or damages to CLEC occasioned thereby.

                  3.13.2 Sprint may terminate, at any time, an Attachment under
                  this Agreement upon thirty (30) calendar days in connection
                  with any taking or condemnation of property on which such
                  Attachment is located by a competent authority for any public
                  use or purpose.

            3.14 Abandonment

                  3.14.1 Nothing in this Agreement shall prevent or be
                  construed to prevent Sprint from abandoning, selling,
                  assigning or otherwise disposing of any Poles, conduit
                  systems, or other Sprint property used for Attachments,
                  provided, however, that Sprint shall condition any such sale,
                  assignment or other disposition subject to the rights granted
                  to CLEC pursuant to this Agreement.   Sprint shall promptly
                  notify CLEC of any proposed sale, assignment or


<PAGE>   107


                  other disposition of any facilities or other Sprint property
                  used for CLEC's Attachments.

            3.15 Dispute Resolution Procedures

                  3.15.1 If either party has declared the other in default of
                  any provisions of this Attachment VI, or has otherwise
                  notified the other party that it is not in compliance with
                  the terms of this Section 3, either party may invoke the
                  Dispute Resolution Procedures, described in Part A of this
                  Agreement, or the procedures described in the Act, the FCC's
                  First Interconnection Order, Section 1217-1231 and the FCC's
                  Rules at 47 CFR Section  1.1401-1.1416.   In the event either
                  party invokes the Dispute Resolution Procedures as provided
                  herein, Sprint will continue to process Attachment Requests
                  pursuant to this Section 3.

                  3.15.2 Sprint will not be relieved of its obligations to
                  process Attachment Requests by CLEC if CLEC is alleged to be
                  in default of this Section 3 for nonpayment of fees and
                  charges due Sprint under this Section 3, so long as such
                  default is (1) the subject of Dispute Resolution Procedures
                  as set forth in Part A of this Agreement; or (2) being
                  adjudicated before the FCC or any other court, regulatory
                  body, agency, or tribunal having jurisdiction over such
                  dispute.


<PAGE>   108


                        PART C - ATTACHMENT VII

                       INTERIM NUMBER PORTABILITY

SECTION 1. SPRINT PROVISION OF INTERIM NUMBER PORTABILITY

            Sprint shall provide interim number portability in accordance with
            requirements of the Act and FCC Rules and Regulations.   INP shall
            be provided with minimum impairment of functionality, quality,
            reliability and convenience to subscribers of CLEC services.

SECTION 2. INTERIM NUMBER PORTABILITY (INP)

            INP shall be provided to the extent technical capabilities allow,
            by Remote Call Forwarding ("RCF") or Direct Inward Dialing (DID).

            2.1 Remote Call Forwarding:   Remote Call Forwarding (RCF) is an
            INP method to provide subscribers with service-provider portability
            by redirecting calls within the telephone network.   When RCF is
            used to provide interim number portability, calls to the ported
            number will first route to the Sprint switch to which the ported
            number was previously assigned.   The Sprint switch will then
            forward the call to a number associated with the CLEC designated
            switch to which the number is ported.   CLEC may order any
            additional paths to handle multiple simultaneous calls to the same
            ported telephone number.

            2.2 DID is an INP method that makes use of direct inward dialing
            trunks.   Each DID trunk group used for INP is dedicated to
            carrying FLEX-DID INP traffic between the Sprint end office and the
            CLEC switch.   Traffic on these trunks cannot overflow to other
            trunks, so the number of trunks shall be conservatively engineered
            by Sprint.   Also, inter-switch signaling is usually limited to
            multi-frequency (MF).   This precludes passing CLID to the CLEC
            switch.

            2.3. The trunking requirements will be agreed upon by Sprint and
            CLEC resultant from application of sound engineering principles.
            These trunking options may include SS7 signaling, inband signaling,
            and may be one way or two way.   The trunks used may be the same as
            those used for exchange of other Local Traffic and toll traffic
            between Sprint and CLEC.

            2.4 LERG Reassignment:   Portability for an entire NXX shall be
            provided by utilizing reassignment of the block to CLEC through the
            Local Exchange Routing Guide (LERG).   Updates to translations in
            the Sprint switching office from which the telephone number is
            ported will be made


<PAGE>   109


            by Sprint prior to the date on which LERG changes become effective,
            in order to redirect calls to the CLEC switch via route indexing.

            2.5 Other Currently Available Number Portability Provisions:

                  2.5.1 Where SS7 is available, Sprint shall exchange with
                  CLEC, SS7 TCAP messages as required for the implementation of
                  Custom Local Area Signaling Services (CLASS) or other
                  features available in the Sprint network, if technically
                  feasible.

                  2.5.2 Upon notification that CLEC will be initiating INP,
                  Sprint shall disclose to CLEC any technical or capacity
                  limitations that would prevent use of the requested INP in
                  the affected switching office.   Sprint and CLEC shall
                  cooperate in the process of porting numbers to minimize
                  subscriber out-of-service time, including updating switch
                  translations where necessary within five (5) minutes after
                  notification that physical cut-over has been completed (or
                  initiated), as CLEC may designate.

                  2.5.3 For INP, CLEC shall have the right to use the existing
                  Sprint 911 infrastructure for all 911 capabilities.   When
                  RCF is used for CLEC subscribers, both the ported numbers and
                  shadow numbers shall be stored in ALI databases.   CLEC shall
                  have the right to verify the accuracy of the information in
                  the ALI databases.

                  2.5.4 When any INP method is used to port a subscriber, the
                  donor provider must maintain the Line Information Database
                  (LIDB) record for that number to reflect appropriate
                  conditions as reported to it by the porting service provider.
                  The donor must outclear call records to CLEC for billing
                  and collection from the subscriber.   Until such time as
                  Sprint's LIDB has the software capability to recognize a
                  ported number as CLEC's, Sprint shall store the ported number
                  in its LIDB at no charge and shall retain revenue for LIDB
                  look-ups to the ported number.   At such time as Sprint's
                  LIDB has the software capability to recognize that the ported
                  number is CLEC's then, if CLEC desires to store numbers on
                  Sprint's LIDB, the parties shall negotiate a separate LIDB
                  database storage and look-up agreement.

                  2.5.5 Sprint should send a CARE transaction 2231 to notify
                  IXC that access is now provided by a new CLEC for that
                  number.


<PAGE>   110



SECTION 3.  REQUIREMENTS FOR INP
      3.1         Cut-Over Process

                  3.1.1 Sprint and CLEC shall cooperate in the process of
                  porting numbers from one carrier to another so as to limit
                  service outage for the ported subscriber.

                        3.1.1.1 For a Coordinated Cutover Environment, Sprint
                        shall verbally coordinate with CLEC the disconnect and
                        switch translations as close to the requested time as
                        possible.   The coordination shall be pre-specified by
                        CLEC and agreed to by both parties and in no case shall
                        begin more than 30 minutes after the agreed upon time.

                        3.1.1.2 For a Non-Coordinated Cutover Environment,
                        Sprint shall schedule a mechanized update of disconnect
                        and switch translations at the CLEC requested cutover
                        time.   Such updates will be available to CLEC at
                        parity with Sprint's own availability for such
                        activity.   Sprint shall provide an operations contact
                        whom CLEC can reach in the event manual intervention is
                        needed to complete the cutover.   In the event of
                        manual intervention, and if Sprint is unable to resolve
                        the issue within sixty (60) minutes, Sprint shall
                        notify CLEC of the issue and CLEC and Sprint shall
                        determine the plan to resolve it.

            3.2 Testing

            Sprint and CLEC shall cooperate in conducting CLEC's testing to
            ensure interconnectivity between systems.  Sprint shall inform CLEC
            of any system updates that may affect the CLEC network and Sprint
            shall, at CLEC's request, perform tests to validate the operation
            of the network.   Additional testing requirements may apply as
            specified by this Agreement.

            3.3 Installation Timeframes

                  3.3.1 Installation Time Frames for RCF ILNP where no other
                  work is required, will be as follows:

                        3.3.1.1 Business Lines and Trunks:

                              3.3.1.1.1 After the FOC date has been
                              established:   Orders of 1-20 lines in three (3)
                              business days; Orders of 21-40 lines in seven (7)
                              business days;


<PAGE>   111


                              Orders of 41-60 in twelve (12) business days;
                              Orders of over 60 lines will have an installation
                              timeframe mutually agreed upon by Sprint and
                              CLEC.

                        3.3.1.2 Residential Lines:

                              3.3.1.2.1 Within two (2) business days of Service
                              Order Receipt by Sprint.

                  3.3.2 If a subscriber elects to move its Telephone Exchange
                  Service back to Sprint while on an INP arrangement, Sprint
                  shall notify CLEC of the Subscriber's termination of service
                  with CLEC and the Subscriber's instructions regarding its
                  telephone number(s) within two (2) business days of receiving
                  notification from the Subscriber.

            3.4 Call Referral Announcements

                  3.4.1 Sprint shall allow CLEC to order all referral
                  announcements, and specify the particular announcement from
                  Sprint's standard set of call referral announcement options,
                  on a per telephone number basis, for telephone numbers which
                  CLEC has ported from Sprint to CLEC and for which INP
                  measures have, at CLEC's direction, been terminated.

            3.5 Engineering and Maintenance

            Sprint and CLEC will cooperate to ensure that performance of
            trunking and signaling capacity is engineered and managed at levels
            which are at parity with that provided by Sprint to its subscribers
            and to ensure effective maintenance testing through activities such
            as routine testing practices, network trouble isolation processes
            and review of operational elements for translations, routing and
            network fault isolation.

            3.6 Operator Services and Directory Assistance

            With respect to operator services and directory assistance
            associated with INP for CLEC subscribers, Sprint shall provide the
            following:

                  3.6.1 While INP is deployed:

                        3.6.1.1 Sprint shall allow CLEC to order provisioning
                        of Telephone Line Number (TLN) calling cards and Billed
                        Number Screening (BNS), in its LIDB for ported numbers,


<PAGE>   112


                        as specified by CLEC.   Sprint shall continue to allow
                        CLEC access to its LIDB.   Other LIDB provisions are
                        specified in this Agreement.

                        3.6.1.2 Where Sprint has control of directory listings
                        for NXX codes containing ported numbers, Sprint shall
                        maintain entries for ported numbers as specified by
                        CLEC.

                  3.6.2 Sprint shall provide a 10-Digit Global Title
                  Translation (GTT) Node for routing queries for TCAP-based
                  operator services (e.g., LIDB).

                  3.6.3 Sprint OSS shall meet all requirements specified in
                  "Generic Operator Services Switching Requirements for Number
                  Portability," Issue 1.00, Final Draft, April 12, 1996.
                  Editor - Nortel.

            3.7 Number Reservation

                  3.7.1 When a subscriber ports to another service provider and
                  has previously secured, via a tariffed offering, a
                  reservation of line numbers from the donor provider for
                  possible activation at some future point, these reserved but
                  inactive numbers shall "port" along with the active numbers
                  being ported by the subscriber in order to ensure that the
                  end user subscriber will be permitted to expand its service
                  using the same number range it could use if it remained with
                  the donor provider.


<PAGE>   113


                        PART C - ATTACHMENT VIII

                     GENERAL BUSINESS REQUIREMENTS

SECTION 1.   GENERAL BUSINESS REQUIREMENTS
          1.1     PROCEDURES
                  1.1.1 Contact with Subscribers

                        1.1.1.1 Each Party at all times shall be the primary
                        contact and account control for all interactions with
                        its subscribers, except as specified by that Party.
                        Subscribers include active subscribers as well as those
                        for whom service orders are pending.

                        1.1.1.2 Each Party shall ensure that any of its
                        personnel who may receive subscriber inquiries, or
                        otherwise have opportunity for subscriber contact from
                        the other Party's subscribers regarding the other
                        Party's services:   (i) provide appropriate referrals
                        to subscribers who inquire about the other Party's
                        services or products; (ii) do not in any way disparage
                        or discriminate against the other Party, or its
                        products or services; and (iii) do not provide
                        information about its products or services during that
                        same inquiry or subscriber contact.

                        1.1.1.3 Sprint shall not use CLEC's request for
                        subscriber information, order submission, or any other
                        aspect of CLEC's processes or services to aid Sprint's
                        marketing or sales efforts.

                  1.1.2 Expedite, Escalation, and Disaster Procedures

                        1.1.2.1 No later than thirty (30) days after the
                        Approval Date of this Agreement, Sprint and CLEC shall
                        develop mutually acceptable escalation and expedite
                        procedures which may be invoked at any point in the
                        Service Ordering, Provisioning, Maintenance, and
                        Subscriber Usage Data transfer processes to facilitate
                        rapid and timely resolution of disputes.   In addition,
                        Sprint and CLEC will establish intercompany contacts
                        lists for purposes of handling subscriber and other
                        matters which require attention/resolution outside of
                        normal business procedures within thirty (30) days
                        after the Approval Date of this Agreement.   Each party
                        shall notify the other party of any changes to its
                        escalation contact list at least one (1) week before
                        such changes are effective.

<PAGE>   114


                        1.1.2.2 No later than thirty (30) days after the
                        Approval Date of this Agreement, Sprint shall provide
                        CLEC with contingency plans for those cases in which
                        normal Service Ordering, Provisioning, Maintenance,
                        Billing, and other procedures for Sprint's unbundled
                        Network Elements, features, functions, and resale
                        services are inoperable.

                  1.1.3 Subscriber of Record

                        1.1.3.1 Sprint shall recognize CLEC as the Subscriber
                        of Record for all Network Elements or services for
                        resale ordered by CLEC and shall send all notices,
                        invoices, and information which pertain to such ordered
                        services directly to CLEC.   CLEC will provide Sprint
                        with addresses to which Sprint shall send all such
                        notices, invoices, and information.

            1.2 SERVICE OFFERINGS

                  1.2.1. Sprint shall provide CLEC with access to new services,
                  features and functions concurrent with Sprint's notice to
                  CLEC of such changes, if such service, feature or function is
                  installed and available in the network or as soon thereafter
                  as it is installed and available in the network, so that CLEC
                  may conduct market testing.

                  1.2.2 Essential Services

                        1.2.2.1 For purposes of service restoral, Sprint shall
                        designate a CLEC access line as an Essential Service
                        Line (ESL) at Parity with Sprint's treatment of its own
                        subscribers and applicable state law or regulation, if
                        any.

                  1.2.3 TTY/TDD

                        1.2.3.1 Sprint shall cooperate with CLEC to provide
                        Telecommunications Services at parity to serve TTY/TDD
                        subscribers.

                  1.2.4 Blocking Services

                        Upon request from CLEC, Sprint shall provide blocking
                        of 700, 900, and 976 services, or other services of
                        similar type as may now exist or be developed in the
                        future, and shall provide Billed Number Screening
                        (BNS), including required LIDB updates, or equivalent
                        service for blocking completion of bill-to-third party
                        and



<PAGE>   115


                        collect calls, on a line, PBX, or individual service
                        basis.   Blocking shall be provided the extent (a) it
                        is an available option for the Telecommunications
                        Service resold by CLEC, or (b) it is technically
                        feasible when requested by CLEC as a function of
                        unbundled Network Elements.

                  1.2.5 Training Support

                        1.2.5.1 Sprint shall provide training, on a
                        non-discriminatory basis, for all Sprint employees who
                        may communicate, either by telephone or face-to-face,
                        with CLEC subscribers.   Such training shall include
                        compliance with the branding requirements of this
                        Agreement including without limitation provisions of
                        forms, business cards and "Not at Home' notices.

                  1.2.6 Carrier Identification Codes

                        Sprint shall provide to CLEC the active Codes (CIC) for
                        both Dial 1 and 800 services for each of its access
                        tandems and shall provide updates promptly as those
                        codes change from time to time.

SECTION 2.  ORDERING AND PROVISIONING
                2.1        GENERAL BUSINESS REQUIREMENTS
                           2.1.1            Ordering and Provisioning Parity

                        2.1.1.1 Sprint shall provide necessary ordering and
                        provisioning business process support as well as those
                        technical and systems interfaces as may be required to
                        enable CLEC to provide the same level and quality of
                        service for all resale services, functions, features,
                        capabilities and unbundled Network Elements at Parity.

                  2.1.2 Local Carrier Service Center
                       (LCSC)/Single Point of Contact (SPOC)

                        2.1.2.1 Sprint shall provide a Local Carrier Service
                        Center or equivalent which shall serve as CLEC's Single
                        Point of Contact (SPOC) for all activities involved in
                        the ordering and provisioning of Sprint's unbundled
                        Network Elements, features, functions, and resale
                        services.

                        2.1.2.2 The SPOC shall provide to CLEC a nationwide
                        telephone number (available from 6:00 a.m.   to 8:00
                        p.m.   Eastern Standard Time, Monday through Friday,
                        and 8:00 am through 5:00 P.M.


<PAGE>   116


                        Eastern Standard Time on Saturday) answered by
                        competent, knowledgeable personnel and trained to
                        answer questions and resolve problems in connection
                        with the ordering and provisioning of unbundled Network
                        Elements (except those associated with local trunking
                        interconnection), features, functions, capabilities,
                        and resale services.

                        2.1.2.3 Sprint shall provide, as requested by CLEC,
                        through the SPOC, provisioning and premises visit
                        installation support in the form of coordinated
                        scheduling, status, and dispatch capabilities during
                        Sprint's standard business hours and at other times as
                        agreed upon by the parties to meet subscriber demand.

                  2.1.3 Street Address Guide (SAG)

                        2.1.3.1 Within thirty (30) days after the Approval Date
                        of this Agreement or as otherwise mutually agreed,
                        Sprint shall provide to CLEC the SAG data, or its
                        equivalent, in an electronic format mutually agreeable
                        to the parties.   All changes and updates to the SAG
                        shall be provided to in a mutually agreed format and
                        timeframe.

                  2.1.4 CLASS and Custom Features

                        2.1.4.1 CLEC may order the entire set of CLASS, CENTREX
                        and Custom features and functions, or a subset of any
                        one of such features.

                  2.1.5 Number Administration/Number Reservation

                        2.1.5.1 Sprint shall provide testing and loading of
                        CLEC's NXX on the same basis as Sprint provides itself
                        or its affiliates.   Further, Sprint shall provide CLEC
                        with access to abbreviated dialing codes, access
                        arrangements for 555 line numbers, and the ability to
                        obtain telephone numbers, including vanity numbers,
                        while a subscriber is on the phone with CLEC.   Sprint
                        shall provide the same range of number choices to CLEC,
                        including choice of exchange number, as Sprint provides
                        its own subscribers.   Reservation and aging of numbers
                        shall remain Sprint's responsibility.

                        2.1.5.2 In conjunction with an order for service,
                        Sprint shall accept CLEC orders for vanity numbers and
                        blocks of numbers for use with complex services
                        including, but not limited to, DID, CENTREX, and
                        Hunting arrangements, as requested by CLEC.


<PAGE>   117


                        2.1.5.3 For simple services number reservations and
                        aging of Sprint's numbers, Sprint shall provide
                        real-time confirmation of the number reservation.   For
                        number reservations associated with complex services,
                        Sprint shall provide confirmation of the number
                        reservation within twenty-four (24) hours of CLEC's
                        request.  Consistent with the manner in which Sprint
                        provides numbers to its own subscribers, no telephone
                        number assignment is guaranteed until service has been
                        installed.

             2.2  SERVICE ORDER PROCESS REQUIREMENTS
                       2.2.1 Service Migrations and New Subscriber Additions

                        2.2.1.1 For resale services, Sprint shall not
                        disconnect any subscriber service or existing features
                        at any time during the migration of that subscriber to
                        CLEC service without prior CLEC agreement.

                        2.2.1.2 For services provided through unbundled Network
                        Elements, Sprint shall recognize CLEC as an agent, in
                        accordance with OBF developed processes, for the
                        subscriber in coordinating the disconnection of
                        services provided by another CLEC or Sprint.   In
                        addition, Sprint and CLEC will work cooperatively to
                        ensure that a subscriber is not disconnected from
                        service during these conversions.

                        2.2.1.3 Unless otherwise directed by CLEC and when
                        technically capable, when CLEC orders resale services
                        or Network Elements all trunk or telephone numbers
                        currently associated with existing services shall be
                        retained without loss of feature capability and without
                        loss of associated ancillary services including, but
                        not limited to, Directory Assistance and 911/E911
                        capability.

                        2.2.1.4 For subscriber conversions requiring
                        coordinated cut-over activities, on a per order basis,
                        Sprint and CLEC will agree on a scheduled conversion
                        time, which will be a designated four-hour time period
                        within a designated date.

                        2.2.1.5 End user service interruptions shall be held to
                        a minimum, and in any event shall not exceed the time
                        Sprint experiences when performing such work for its
                        own subscribers.

                        2.2.1.6 A general Letter of Agency ("LOA") initiated by
                        Carrier or Sprint will be required to process a PLC or
                        PIC change order.   No


<PAGE>   118


                        LOA signed by the end-user will be required to process
                        a PLC or PIC change ordered by Carrier or Sprint.
                        Carrier and Sprint agree that PLC and PIC change orders
                        will be supported with appropriate documentation and
                        verification as required by FCC and Commission rules.
                        In the event of a subscriber complaint of an
                        unauthorized PLC record change where the Party that
                        ordered such change is unable to produce appropriate
                        documentation and verification as required by FCC and
                        Commission rules (or, if there are no rules applicable
                        to PLC record changes, then such rules as are
                        applicable to changes in long distance carriers of
                        record), such Party shall be liable to pay and shall
                        pay all nonrecurring charges associated with
                        reestablishing the subscriber's local service with the
                        original local carrier.

                  2.2.2 Intercept Treatment and Transfer Service Announcements

                        2.2.2.1 Sprint shall provide unbranded intercept
                        treatment and transfer of service announcements to
                        CLEC's subscribers.   Sprint shall provide such
                        treatment and transfer of service announcement in
                        accordance with local tariffs and as provided to
                        similarly situated Sprint subscribers for all service
                        disconnects, suspensions, or transfers.

                  2.2.3 Due Date

                        2.2.3.1 Sprint shall supply CLEC with due date
                        intervals to be used by CLEC personnel to determine
                        service installation dates.

                        2.2.3.2 Sprint shall use best efforts to complete
                        orders by the CLEC requested DDD within agreed upon
                        intervals and performance measures.

                  2.2.4 Subscriber Premises Inspections and Installations

                        2.2.4.1 CLEC shall perform or contract for all CLEC's
                        needs assessments, including equipment and installation
                        requirements, at the subscriber premises.

                        2.2.4.2 Sprint shall provide CLEC with the ability to
                        schedule subscriber premises installations.   The
                        parties shall mutually agree on an interim process to
                        provide this functionality during the implementation
                        planning process.

                  2.2.5 Firm Order Confirmation (FOC)


<PAGE>   119


                        2.2.5.1 Sprint shall provide to CLEC, a Firm Order
                        Confirmation (FOC) for each CLEC order.   The FOC shall
                        contain the appropriate data elements as defined by the
                        OBF standards.

                        2.2.5.2 For a revised FOC, Sprint shall provide
                        standard detail as defined by the OBF standards.

                        2.2.5.3 Sprint shall provide to CLEC the date that
                        service is scheduled to be installed.

                  2.2.6 Order Rejections

                        2.2.6.1 Sprint shall reject and return to CLEC any
                        order that Sprint cannot provision, due to technical
                        reasons, missing information, or jeopardy conditions.
                        When an order is rejected, Sprint shall, in its reject
                        notification, specifically describe all of the reasons
                        for which the order was rejected.   Sprint shall not
                        reject any orders on account of the Desired Due Date.

                  2.2.7 Service Order Changes

                        2.2.7.1 If an installation or other CLEC ordered work
                        requires a change from the original CLEC service order
                        in any manner, Sprint shall call CLEC in advance of
                        performing the installation or other work to obtain
                        authorization.   Sprint shall then provide CLEC an
                        estimate of additional labor hours and/or materials.
                        After all installation or other work is completed,
                        Sprint shall promptly notify CLEC of costs.

                              2.2.7.1.1 If additional work is completed on a
                              service order, as approved by CLEC, the cost of
                              the additional work must be reported promptly to
                              CLEC.

                              2.2.7.1.2 If a service order is partially
                              completed, notification must identify the work
                              that was done and work remaining to complete.

                        2.2.7.2 If a CLEC subscriber requests a service change
                        at the time of installation or other work being
                        performed by Sprint on behalf of CLEC, Sprint, while at
                        the subscriber premises, shall direct the CLEC
                        subscriber to contact CLEC.

                        2.2.8  Cooperative Testing


<PAGE>   120

                              2.2.8.1     Network Testing

                              2.2.8.1.1 Sprint shall perform all its standard
                              pre-service testing prior to the completion of
                              the order.

                              2.2.8.1.2 Within 24 hours of CLEC's request for
                              scheduled cooperative maintenance testing, Sprint
                              shall perform said testing with CLEC (including
                              trouble shooting to isolate any problems) to test
                              Network Elements purchased by CLEC in order to
                              identify any problems.

                  2.2.9 Service Suspensions/Restorations

                        2.2.9.1 Upon CLEC's request through an Industry
                        Standard (OBF) Suspend/Restore Order, or mutually
                        agreed upon interim procedure, Sprint shall suspend or
                        restore the functionality of any Network Element,
                        feature, function, or resale service to which
                        suspend/restore is applicable.   Sprint shall provide
                        restoration priority on a per network element basis in
                        a manner that conforms with any applicable regulatory
                        Rules and Regulations or government requirements.

                  2.2.10 Order Completion Notification

                        2.2.10.1 Upon completion of the requests submitted by
                        CLEC, Sprint shall provide to CLEC a completion
                        notification in an industry standard (i.e.   OBF) or in
                        a mutually agreed format.   The completion notification
                        shall include detail of the work performed, to the
                        extent this is defined within OBF guidelines, and in an
                        interim method until such standards are defined.

                  2.2.11 Specific Unbundling Requirements

                        2.2.11.1 CLEC may order and Sprint shall provision
                        unbundled Network Elements.   However, it is CLEC's
                        responsibility to combine the individual network
                        elements should it desire to do so.

                        2.2.11.2 When CLEC orders Network Elements that are
                        currently connected Sprint shall ensure such Network
                        Elements remain connected and functional without any
                        disconnection or disruption.   This shall be known as
                        Contiguous Network Connection of Network Elements.
                        There shall be no charge for such pre-existing
                        connections.


<PAGE>   121


              2.3  SYSTEMS INTERFACES AND INFORMATION EXCHANGES
                       2.3.1 General Requirements

                        2.3.1.1 Sprint shall provide to CLEC Electronic
                        Interface(s) for transferring and receiving information
                        and executing transactions for all business functions
                        directly or indirectly related to Service Ordering and
                        Provisioning of Network Elements, features, functions
                        and Telecommunications Services, as specified in
                        Exhibit to Part A.   The Interface(s) shall be
                        developed/designed for the transmission of data from
                        CLEC to Sprint, and from Sprint to CLEC.

                        2.3.1.2 Interim interfaces or processes may be
                        modified, if so agreed by CLEC and Sprint, during the
                        interim period.

                        2.3.1.3 Until the real-time, Electronic Interface is
                        available, Sprint agrees that the Local Carrier Service
                        Center (LCSC) or similar function will accept CLEC
                        orders.   Orders will be transmitted to the LCSC via an
                        interface or method agreed upon by CLEC and Sprint.

                  2.3.2 For any CLEC subscriber Sprint shall provide, subject
                  to applicable rules, orders, and decisions, CLEC with access
                  to Customer Proprietary Network Information (CPNI) without
                  requiring CLEC to produce a signed Letter of Agency (LOA),
                  based on CLEC's blanket representation that subscriber has
                  authorized CLEC to obtain such CPNI.

                        2.3.2.1 The preordering Electronic Interface includes
                        the provisioning of Customer Proprietary Network
                        Information (CPNI) information from Sprint to CLEC.
                        The Parties agree to execute a Letter of Authorization
                        (LOA) agreement prior to requesting CPNI for a Sprint
                        end user, and to request end user CPNI only when the
                        end user has specifically given permission to receive
                        CPNI.   The Parties agree that they will conform to FCC
                        and/or state regulations regarding the provisioning of
                        CPNI between the parties, and regarding the use of that
                        information by the requesting party.

                        2.3.2.2 The requesting Party will document end user
                        permission obtained to receive CPNI, whether or not the
                        end user has agreed to change local service providers.
                        For end users changing service from one party to the
                        other, specific end user LOAs may be requested by the
                        Party receiving CPNI requests to investigate possible
                        slamming incidents, and for other reasons agreed to by
                        the Parties.   The receiving Party may also request
                        documentation of an LOA if CPNI is requested and a
                        subsequent service order for the change of local
                        service is not received.


<PAGE>   122


                        2.3.2.3 On a schedule to be determined by Sprint,
                        Sprint will perform a comparison of requests for CPNI
                        to service orders received for the change of Local
                        Service to CLEC.   Sprint will produce a report of
                        unmatched requests for CPNI, and may require an LOA
                        from CLEC for each unmatched request.  CLEC agrees to
                        provide evidence of end user permission for receipt of
                        CPNI for all end users in the request by Sprint within
                        three (3) business days of receipt of a request from
                        Sprint.   Should Sprint determine that there has been a
                        substantial percentage of unmatched LOA requests,
                        Sprint reserves the right to immediately disconnect the
                        preordering Electronic Interface.

                        2.3.2.4 If CLEC is not able to provide the LOA for 95%
                        of the end users requested by Sprint, or if Sprint
                        determines that the LOA is inadequate, CLEC will be
                        considered in breach of the agreement.   CLEC can cure
                        the breach by submitting to Sprint evidence of an LOA
                        within three (3) business days of notification of the
                        breach.

                        2.3.2.5 Should CLEC not be able to cure the breach in
                        the timeframe noted above, Sprint will provide written
                        notice to CLEC that Sprint will disconnect the
                        preordering Electronic Interface between the Parties.
                        Sprint will provide its manual interim systems and
                        procedures for CLEC's use, which will not provide
                        parity of service to CLEC.   Sprint will suspend the
                        calculation of the preordering service quality measures
                        agreed to in Attachment 9 until, in Sprint's
                        determination, CLEC has corrected the problem that
                        caused the breach.

                        2.3.2.6 Sprint will reconnect the preordering
                        Electronic Interface upon Sprint's timely review and
                        acceptance of evidence provided by CLEC to correct the
                        problem that caused the breach.

                        2.3.2.7 Should Sprint disconnect the preordering
                        Electronic Interface to CLEC three times in any twenty
                        four (24) month period for breach of these preordering
                        procedures, Sprint may permanently disconnect the
                        preordering Electronic Interface, and/or may terminate
                        the Interconnection Agreement in accordance with Part A
                        herein.

                        2.3.2.8 If CLEC and Sprint do not agree that CLEC
                        requested CPNI for a specific end user, or that Sprint
                        has erred in not accepting proof of an LOA, the Parties
                        may immediately request dispute resolution in
                        accordance with Part A .   Sprint will not disconnect
                        the preordering Electronic Interface during the
                        Alternate Dispute Resolution process.


<PAGE>   123


                        2.3.2.9 When available per Electronic Interface
                        Implementation Plan, Sprint shall provide to CLEC
                        Electronic Interface to Sprint information systems to
                        allow CLEC to assign telephone number(s) (if the
                        subscriber does not already have a telephone number or
                        requests a change of telephone number) at Parity.

                        2.3.2.10 When available per Electronic Interface
                        Implementation Plan, Sprint shall provide to CLEC a
                        real-time, Electronic Interface to schedule dispatch
                        and installation appointments at Parity.

                        2.3.2.11 When available per Electronic Interface
                        Implementation Plan, Sprint shall provide to CLEC a
                        real-time, Electronic Interface to Sprint subscriber
                        information systems which will allow CLEC to determine
                        if a service call is needed to install the line or
                        service at Parity.

                        2.3.2.12 When available per Electronic Interface
                        Implementation Plan, Sprint shall provide to CLEC a
                        real-time, Electronic Interface to Sprint information
                        systems which will allow CLEC to provide service
                        availability dates at Parity.

                        2.3.2.13 When available per Electronic Interface
                        Implementation Plan, Sprint shall provide to CLEC a
                        real-time, Electronic Interface which transmits status
                        information on service orders at Parity.   Until
                        real-time Electronic Interface is available, Sprint
                        agrees that Sprint will provide proactive status on
                        service orders at the following critical intervals:
                        acknowledgment, firm order confirmation, and completion
                        according to interim procedures to be mutually
                        developed.

                  2.3.3 Ordering and Provisioning for Unbundling

                        2.3.3.1 To the extent Sprint has such information,
                        Sprint shall provide to CLEC upon request advance
                        information of the details and requirements for
                        planning and implementation of NPA splits at least 6
                        months prior to implementation of the split.

                        2.3.3.2 Sprint shall provide to CLEC information on
                             charges associated with special construction.
                             Until real-time, Electronic Interface is
                             available, Sprint agrees that Sprint will promptly
                             notify CLEC of any charges associated with
                             necessary construction.


<PAGE>   124


                        2.4 Standards

                  2.4.1 General Requirements

                        2.4.1.1 CLEC and Sprint shall agree upon the
                        appropriate ordering and provisioning codes to be used
                        for Network Elements.   These codes shall apply to all
                        aspects of the unbundling of that element and shall be
                        known as data elements as defined by the
                        Telecommunications Industry Forum Electronic Data
                        Interchange Service Order Subcommittee (TCIF-EDI-SOSC).

SECTION 3.  BILLING
         3.1      PROCEDURES

                  3.1.1 Sprint shall comply with various industry, OBF, and
                  other standards referred to throughout this Agreement.
                  Sprint and CLEC will review any changes to industry
                  standards, and Sprint's interpretation of these standards
                  before they are implemented by Sprint.   Until industry
                  standards are adopted and implemented, Sprint shall utilize
                  an interim process as determined by Sprint and reviewed by
                  CLEC as part of the Implementation Plan.

                  3.1.2 Sprint shall bill CLEC for each service supplied by
                  Sprint to CLEC pursuant to this Agreement at the rates set
                  forth in this Agreement.

                  3.1.3 Sprint shall provide to CLEC a single point of contact
                  for interconnection and Network Elements at Sprint's National
                  Access Service Center (NASC), and for resale at Sprint's IPOC
                  to handle any Connectivity Billing questions or problems that
                  may arise during the implementation and performance of the
                  terms and conditions of this Agreement.

                  3.1.4 Sprint shall provide a single point of contact at each
                  Sprint data center for handling of any data exchange
                  questions or problems that may arise during the
                  implementation and performance of the terms and conditions of
                  this Agreement.

                  3.1.5 Subject to the terms of this Agreement, including
                  without limitation Sections 3.1.6 of this Attachment VIII,
                  CLEC shall pay Sprint within thirty (30) days from the Bill
                  Date.   If the payment due date is a Saturday, Sunday or a
                  has been designated a bank holiday payment shall be made the
                  next business day.


<PAGE>   125


                  3.1.6 Billed amounts which are being investigated, queried,
                  or for which claims have or may be filed shall be handled in
                  accordance with the procedures set forth in Part A Section 23
                  of this Agreement.

                  3.1.7 Sprint will assess late payment charges to CLEC in
                  accordance with the applicable tariff or, if there is no
                  tariff Sprint will assess a late payment charge equal to the
                  lesser of one and one-half percent (1 1/2%) or the maximum
                  rate allowed by law per month of the balance due, until the
                  amount due, including late payment charges, is paid in full.

                  3.1.8 Sprint shall credit CLEC for incorrect Connectivity
                  Billing charges including without limitation:   overcharges,
                  services ordered or requested but not delivered, interrupted
                  services, services of poor quality and installation problems
                  if caused by Sprint.   Such reimbursements shall be set forth
                  in the appropriate section of the Connectivity Bill pursuant
                  to CABS, or SECAB standards.

                  3.1.9 The parties agree to record call information for
                  interconnection in accordance with this Subsection 3.1.   To
                  the extent technically feasible, each party shall record all
                  call detail information associated with every call originated
                  or terminated to the other party's local exchange subscriber.
                  Sprint shall record for CLEC the messages that Sprint
                  records for its end users.   These records shall be provided
                  at a party's request and shall be formatted pursuant to
                  Bellcore's EMR standards and the terms and conditions of this
                  Agreement.   These records shall be transmitted to the other
                  party on non-holiday business days in EMR format via CDN.
                  Sprint and CLEC agree that they shall retain, at each party's
                  sole expense, copies of all EMR records transmitted to the
                  other party for at least forty five (45) calendar days after
                  transmission to the other party.

                  3.1.10 Sprint shall be responsible for billing and collecting
                  charges from IXCs for access related to interexchange calls
                  generated by resale subscribers.

                  3.1.11 Sprint shall establish a switched access meet point
                  billing arrangement with CLEC.   This arrangement will
                  include tandem routed IXC calls and IXC calls.

                        3.1.11.1 CLEC will bill for CLEC common line, local
                        switching, RIC, and its portion of the transport
                        charges for tandem routed IXC calls.

                        3.1.11.2 SPRINT and CLEC will provide all necessary
                        switched access records to each other for access
                        billing.


<PAGE>   126


            3.2 REVENUE PROTECTION

                  3.2.1 Sprint shall make available to CLEC, at parity with
                  what Sprint provides to itself, its Affiliates and other
                  local telecommunications CLECs, all present and future fraud
                  prevention or revenue protection features, including
                  prevention, detection, or control functionality embedded
                  within any of the Network Elements.   These features include,
                  but are not limited to screening codes, information digits
                  assigned such as information digits '29' and '70' which
                  indicate prison and COCOT pay phone originating line types
                  respectively, call blocking of domestic, international, 800,
                  888, 900, NPA-976, 700, 500 and specific line numbers, and
                  the capability to require end-user entry of an authorization
                  code for dial tone.   Sprint shall, when technically capable
                  and consistent with the implementation schedule for OSS,
                  additionally provide partitioned access to fraud prevention,
                  detection and control functionality within pertinent
                  Operations Support Systems ("OSS").

SECTION 4. PROVISION OF SUBSCRIBER USAGE DATA

            This Section 4 sets forth the terms and conditions for Sprint's
            provision of Recorded Usage Data (as defined in this Attachment
            VIII) to CLEC and for information exchange regarding long distance
            billing.

            4.1  PROCEDURES
                4.1.1  General

                        4.1.1.1 Sprint shall comply with various industry and
                        OBF standards referred to throughout this Agreement..

                        4.1.1.2 Sprint shall comply with OBF standards when
                        recording and transmitting Usage Data.

                        4.1.1.3 Sprint shall record all usage originating from
                        CLEC subscribers using service ordered by CLEC, where
                        Sprint records those same services for Sprint
                        subscribers.   Recorded Usage Data includes, but is not
                        limited to, the following categories of information:

                              --    Use of CLASS/LASS/Custom Features that 
                                    Sprint records and bills for its 
                                    subscribers on a per usage basis

                              --    Calls To Information Providers Reached Via 
                                    Sprint Facilities will be provided in 
                                    accordance with Section 4.1.1.7

<PAGE>   127


                              --   Calls To Directory Assistance Where Sprint
                                   Provides Such Service To An CLEC Subscriber

                              --   Calls Completed Via Sprint-Provided Operator
                                   Services Where Sprint Provides Such Service
                                   To CLEC's Local Service Subscriber and where
                                   Sprint records such usage for its
                                   subscribers using Industry Standard Bellcore
                                   EMR billing records.

                              --   For Sprint-Provided Centrex Service, Station
                                   Level Detail

                        4.1.1.4 Retention of Records:   Sprint shall maintain a
                        machine readable back-up copy of the message detail
                        provided to CLEC for a minimum of forty-five (45)
                        calendar days.   During the 45 day period, Sprint shall
                        provide any data back-up to CLEC upon the request of
                        CLEC.   If the 45 day has expired, Sprint may provide
                        the data back-up at CLEC's expense.

                        4.1.1.5 Sprint shall provide to CLEC Recorded Usage
                        Data for CLEC subscribers.   Sprint shall not submit
                        other CLEC local usage data as part of the CLEC
                        Recorded Usage Data.

                        4.1.1.6 Sprint shall not bill directly to CLEC
                        subscribers any recurring or non-recurring charges for
                        CLEC's services to the subscriber except where
                        explicitly permitted to do so within a written
                        agreement between Sprint and CLEC.

                        4.1.1.7 Sprint will record 976/N11 calls and transmit
                        them to the Information Service Provider ("ISP") for
                        billing.   Sprint will not bill these calls to either
                        the CLEC or the CLEC's end user.

                        4.1.1.8 Sprint shall provide Recorded Usage Data to
                        CLEC billing locations as agreed to by the Parties.

                        4.1.1.9 Sprint shall establish a Local Carrier Service
                        Center (LCSC) or similar function to serve as CLEC's
                        single point of contact to respond to CLEC call usage,
                        data error, and record transmission inquiries.

                        4.1.1.10 Sprint shall provide CLEC with a single point
                        of contact and remote identifiers (IDs) for each
                        sending location.


<PAGE>   128


                        4.1.1.11 CLEC shall provide a single point of contact
                        responsible for receiving usage transmitted by Sprint
                        and receiving usage tapes from a courier service in the
                        event of a facility outage.

                        4.1.1.12 Sprint shall bill and CLEC shall pay the
                        charges for Recorded Usage Data.   Billing and payment
                        shall be in accordance with the applicable terms and
                        conditions set forth in the Connectivity Billing and
                        Recording Section of this Attachment VIII

                  4.1.2 Charges

                        4.1.2.1 Sprint shall bill for message provisioning,
                        data transmission and for data tape charges.

                  4.1.3 Central Clearinghouse & Settlement

                         4.1.3.1 Sprint and CLEC shall  agree upon
                         Clearinghouse and Incollect/Outcollect procedures.

                        4.1.3.2 Sprint shall settle with CLEC for both
                        intra-region and inter-region billing exchanges of
                        calling card, bill-to-third party, and collect calls
                        under separately negotiated settlement arrangements.

                  4.1.4 Lost Data

                        4.1.4.1 Loss of Recorded Usage Data - CLEC Recorded
                        Usage Data determined to have been lost, damaged or
                        destroyed as a result of an error or omission by Sprint
                        in its performance of the recording function shall be
                        recovered by Sprint at no charge to CLEC.   In the
                        event the data cannot be recovered by Sprint, Sprint
                        shall estimate the messages and associated revenue,
                        with assistance from CLEC, based upon the method
                        described below.   This method shall be applied on a
                        consistent basis, subject to modifications agreed to by
                        Sprint and CLEC.   This estimate shall be used to
                        adjust amounts CLEC owes Sprint for services Sprint
                        provides in conjunction with the provision of Recorded
                        Usage Data.

                        4.1.4.2 Partial Loss - Sprint shall review its daily
                        controls to determine if data has been lost.   When
                        there has been a partial loss, actual message and
                        minute volumes shall be reported, if possible through
                        recovery as discussed in 4.1.4.1 above.   Where actual
                        data are not available, a full day shall be estimated
                        for the recording entity, as outlined in the following
                        paragraphs.   The amount of the partial loss is then
                        determined by subtracting the



<PAGE>   129


                        data actually recorded for such day from the estimated
                        total for such day.

                        4.1.4.3 Complete Loss - When Sprint is unable to
                        recover data as discussed in 4.1.4.1 above estimated
                        message and minute volumes for each loss consisting of
                        an entire AMA tape or entire data volume due to its
                        loss prior to or during processing, lost after receipt,
                        degaussed before processing, receipt of a blank or
                        unreadable tape, or lost for other causes, shall be
                        reported.

                        4.1.4.4 Estimated Volumes - From message and minute
                        volume reports for the entity experiencing the loss,
                        Sprint shall secure message/minute counts for the four
                        (4) corresponding days of the weeks preceding that in
                        which the loss occurred and compute an average of these
                        volumes.   Sprint shall apply the appropriate average
                        revenue per message ("arpm") agreed to by CLEC and
                        Sprint to the estimated message volume for messages for
                        which usage charges apply to the subscriber to arrive
                        at the estimated lost revenue.

                        4.1.4.5 If the day of loss is not a holiday but one (1)
                        (or more) of the preceding corresponding days is a
                        holiday, use additional preceding weeks in order to
                        procure volumes for two (2) non-holidays in the
                        previous two (2) weeks that correspond to the day of
                        the week that is the day of the loss

                        4.1.4.6 If the loss occurs on a weekday that is a
                        holiday (except Christmas and Mother's day), Sprint
                        shall use volumes from the two (2) preceding Sundays.

                        4.1.4.7 If the loss occurs on Mother's day or Christmas
                        day, Sprint shall use volumes from that day in the
                        preceding year multiplied by a growth factor derived
                        from an average of CLEC's most recent three (3) month
                        message volume growth.   If a previous year's message
                        volumes are not available, a settlement shall be
                        negotiated.

                  4.1.5 Testing, Changes and Controls

                        4.1.5.1 The Recorded Usage Data, EMR format, content,
                        and transmission process shall be tested as agreed upon
                        by CLEC and Sprint.




<PAGE>   130


                        4.1.5.2 Periodic Review:   Control procedures for all
                        usage transferred between Sprint and CLEC shall require
                        periodic review.   This review may be included as part
                        of an Audit of Sprint by CLEC or as part of the normal
                        production interface management function.   Breakdowns
                        which impact the flow of usage between Sprint and CLEC
                        must be identified and jointly resolved as they occur.
                        The resolution may include changes to control
                        procedures, so similar problems would be avoided in the
                        future.   Any changes to control procedures would need
                        to be mutually agreed upon by CLEC and Sprint.

                        4.1.5.3 Sprint Software Changes

                              4.1.5.3.1 When Sprint plans to introduce any
                              software changes which impact the format or
                              content structure of the usage data feed to CLEC,
                              designated Sprint personnel shall notify CLEC no
                              less than ninety (90) calendar days before such
                              changes are implemented.

                              4.1.5.3.2 Sprint shall communicate the projected
                              changes to CLEC's single point of contact so that
                              potential impacts on CLEC processing can be
                              determined.

                              4.1.5.3.3 CLEC personnel shall review the impact
                              of the change on the entire control structure.
                              CLEC shall negotiate any perceived problems with
                              Sprint and shall arrange to have the data tested
                              utilizing the modified software if required.

                              4.1.5.3.4 If it is necessary for Sprint to
                              request changes in the schedule, content or
                              format of usage data transmitted to CLEC, Sprint
                              shall notify CLEC.

                        4.1.5.4 CLEC Requested Changes:

                              4.1.5.4.1 CLEC may submit a purchase order to
                              negotiate and pay for changes in the content and
                              format of the usage data transmitted by Sprint.

                              4.1.5.4.2 When the negotiated changes are to be
                              implemented, CLEC and/or Sprint shall arrange for
                              testing of the modified data.




<PAGE>   131



               4.2  INFORMATION EXCHANGE AND INTERFACES
                    4.2.1 Product/Service Specific

                        4.2.1.1 Sprint shall provide a Bellcore standard
                        42-50-01 miscellaneous charge record to support the
                        Special Features Star Services if these features are
                        part of Sprint's offering and are provided for Sprint's
                        subscribers on a per usage basis.

                  4.2.2 Rejected Recorded Usage Data

                        4.2.2.1 Upon agreement between CLEC and Sprint messages
                        that cannot be rated and/or billed by CLEC may be
                        returned to Sprint via CDN.   Returned messages shall
                        be sent directly to Sprint in their original EMR
                        format.   Standard EMR return codes shall be utilized.

                        4.2.2.2 Sprint may correct and resubmit to CLEC any
                        messages returned to Sprint.   Sprint will not be
                        liable for any records determined by Sprint to be
                        billable to a CLEC end user.   CLEC will not return a
                        message that has been corrected and resubmitted by
                        Sprint.   Sprint will only assume liability for errors
                        and unguideables caused by Sprint.

SECTION 5. GENERAL NETWORK REQUIREMENTS

            5.1 Sprint shall provide repair, maintenance and testing for all
            Telecommunications Services and unbundled Network Elements in
            accordance with the terms and conditions of this Agreement.

                  5.1.1 During the term of this Agreement, Sprint shall provide
                  necessary maintenance business process support as well as
                  those technical and systems interfaces at Parity.   Sprint
                  shall provide CLEC with maintenance support at Parity.

                  5.1.2 Sprint shall provide, initially on a regional basis,
                  and subsequently on a national basis, a SPOC (Single Point of
                  Contact) for CLEC to report via telephone maintenance issues
                  and trouble reports twenty four (24) hours a day and seven
                  (7) days a week.

                  5.1.3 Sprint shall provide CLEC maintenance dispatch
                  personnel on the same schedule that it provides its own
                  subscribers.

                  5.1.4 Sprint shall cooperate with CLEC to meet maintenance
                  standards for all Telecommunications Services and unbundled
                  network elements




<PAGE>   132


                  ordered under this Agreement.   Such maintenance standards
                  shall include, without limitation, standards for testing,
                  network management, call gapping, and notification of
                  upgrades as they become available.

                  5.1.5 All Sprint employees or contractors who perform repair
                  service for CLEC subscribers shall follow Sprint standard
                  procedures in all their communications with CLEC subscribers.
                  These procedures and protocols shall ensure that:   (1 )
                  Sprint employees or contractors shall perform repair service
                  that is equal in quality to that provided to Sprint
                  subscribers; (2) trouble calls from CLEC subscribers shall
                  receive response time priority that is equal to that of
                  Sprint subscribers and shall be handled on a "first come
                  first served" basis regardless of whether the subscriber is a
                  CLEC subscriber or an Sprint subscriber.

                  5.1.6 Sprint shall provide CLEC with scheduled maintenance,
                  including, without limitation, required and recommended
                  maintenance intervals and procedures, for all
                  Telecommunications Services and network elements provided to
                  CLEC under this Agreement equal in quality to that currently
                  provided by Sprint in the maintenance of its own network.

                  5.1.7 Sprint shall give maximum advanced notice to CLEC of
                  all nonscheduled maintenance or other planned network
                  activities to be performed by Sprint on any network element,
                  including, without limitation, any hardware, equipment,
                  software, or system, providing service functionality which
                  may potentially impact CLEC subscribers.

                  5.1.8 For purposes of this subsection 5.1 an emergency
                  network outage is defined as an outage affecting more than
                  25% of subscriber facilities in a single exchange.

                  5.1.9 On all misdirected calls from CLEC subscribers
                  requesting repair, Sprint shall provide such CLEC subscriber
                  with the correct CLEC repair telephone number as such number
                  is provided to Sprint by CLEC.

                  5.1.10 Upon establishment of an Electronic Interface, Sprint
                  shall notify CLEC via such electronic interface upon
                  completion of trouble report.   The report shall not be
                  considered closed until such notification is made.   CLEC
                  will contact its subscriber to determine if repairs were
                  completed and confirm the trouble no longer exists.

                  5.1.11 Sprint and CLEC may mutually agree to performance
                  reporting as business needs demand.




<PAGE>   133


                  5.1.12 Once the electronic gateway is established between
                  Sprint and CLEC, Sprint agrees that CLEC may report troubles
                  directly to a single Sprint repair/maintenance center for
                  both residential and business subscribers, unless otherwise
                  agreed to by CLEC.

                  5.1.13 Sprint shall perform all testing for resold
                  Telecommunications Services.

                  5.1.14 Sprint shall provide test results to CLEC, if
                  appropriate, for trouble clearance.   In all instances,
                  Sprint shall provide CLEC with the disposition of the
                  trouble.

                  5.1.15 If Sprint initiates trouble handling procedures, it
                  will bear all costs associated with that activity.   If CLEC
                  requests the trouble dispatch, then CLEC's subscriber will
                  bear the cost.

SECTION 6.  MISCELLANEOUS SERVICES AND FUNCTIONS
          6.0     GENERAL

                        6.0.1 To the extent that Sprint does not provide the
                        services described in this Section 6 to itself, Sprint
                        will use reasonable efforts to facilitate the
                        acquisition of such services for or by CLEC through the
                        existing service provider.   CLEC must contract
                        directly with the service provider for such services.

            6.1  GENERAL REQUIREMENTS
                 6.1.1       Basic 911 and E911 General Requirements

                        6.1.1.1 Basic 911 and E911 provides a caller access to
                        the appropriate emergency service bureau by dialing a
                        3-digit universal telephone number (911).   Basic 911
                        and E911 access from Local Switching shall be provided
                        to CLEC in accordance with the following:

                        6.1.1.2 E911 shall provide additional routing
                        flexibility for 911 calls.   E911 shall use subscriber
                        data, contained in the Automatic Location
                        Identification/Data Management System (ALI/DMS), to
                        determine to which Public Safety Answering Point (PSAP)
                        to route the call.

                        6.1.1.3 If available, Sprint shall offer a third type
                        of 911 service, S911.   All requirements for E911 also
                        apply to S911 with the




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                        exception of the type of signaling used on the
                        interconnection trunks from the local switch to the
                        S911 tandem.

                        6.1.1.4 Basic 911 and E911 functions provided to CLEC
                        shall be at parity with the support and services that
                        Sprint provides to its subscribers for such similar
                        functionality.

                        6.1.1.5 Basic 911 and E911 access when CLEC purchases
                        Local Switching shall be provided to CLEC in accordance
                        with the following:

                              6.1.1.5.1 Sprint shall conform to all state
                              regulations concerning emergency services.

                              6.1.1.5.2 For E911, Sprint shall use its service
                              order process to update and maintain subscriber
                              information in the ALI/DMS data base.   Through
                              this process, Sprint shall provide and validate
                              CLEC subscriber information resident or entered
                              into the ALI/DMS data base.

                        6.1.1.6 Sprint shall provide for overflow 911 traffic
                        to be routed to Sprint Operator Services or, at CLEC's
                        discretion, directly to CLEC operator services.

                        6.1.1.7 Basic 911 and E911 access from the CLEC local
                        switch shall be provided to CLEC in accordance with the
                        following:

                              6.1.1.7.1 If required by CLEC, Sprint shall
                              interconnect direct trunks from the CLEC network
                              to the E911 PSAP, or the E911 tandems as
                              designated by CLEC.   Such trunks may
                              alternatively be provided by CLEC.

                              6.1.1.7.2 In government jurisdictions where
                              Sprint has obligations under existing agreements
                              as the primary provider of the 911 System to the
                              county ("Host SPRINT"), CLEC shall participate in
                              the provision of the 911 System as follows:

                                    6.1.1.7.2.1 Each party shall be responsible
                                    for those portions of the 911 System for
                                    which it has control, including any
                                    necessary maintenance to each party's
                                    portion of the 911 System.

                                    6.1.1.7.2.2 Host SPRINT shall be
                                    responsible for maintaining the E-911
                                    database.   Sprint shall be



<PAGE>   135


                                    responsible for maintaining the E-911
                                    routing database.

                              6.1.1.7.3 If a third party, is the primary
                              service provider to a government agency, CLEC
                              shall negotiate separately with such third party
                              with regard to the provision of 911 service to
                              the agency.   All relations between such third
                              party and CLEC are totally separate from this
                              Agreement and Sprint makes no representations on
                              behalf of the third party.

                              6.1.1.7.4 If CLEC or its Affiliate is the primary
                              service provider to a government agency, CLEC and
                              Sprint shall negotiate the specific provisions
                              necessary for providing 911 service to the agency
                              and shall include such provisions in an amendment
                              to this Agreement.

                              6.1.1.7.5 Interconnection and database access
                              shall be priced as specified in Attachment I or
                              at any rate charged to other interconnected
                              CLECs, whichever is lower.

                              6.1.1.7.6 Sprint shall comply with established,
                              competitively neutral intervals for installation
                              of facilities, including any collocation
                              facilities, diversity requirements, etc.

                              6.1.1.7.7 In a resale situation, where it may be
                              appropriate for Sprint to update the ALI
                              database, Sprint shall update such database with
                              CLEC data in an interval at parity with that
                              experienced by Sprint subscribers, or other
                              CLECs, whichever is faster, at no additional
                              cost.

                        6.1.1.8 Sprint shall transmit to CLEC daily all
                        changes, alterations, modifications, and updates to the
                        emergency public agency telephone numbers linked to all
                        NPA NXX's.   This transmission shall be electronic and
                        be a separate feed from the subscriber listing feed.

                        6.1.1.9 Sprint shall provide to CLEC the necessary
                        Network Elements in order for CLEC to provide E911/911
                        services to government agencies.   If such elements are
                        not available from Sprint, Sprint shall offer E911/911
                        service for resale by CLEC to government agencies.

                        6.1.1.10 The following are Basic 911 and E91 1 Database
                        Requirements:


<PAGE>   136


                              6.1.1.10.1 The ALI database shall be managed by
                              Sprint, but is the property of Sprint and any
                              participating telephone company and SPRINT for
                              those records provided by the company.

                              6.1.1.10.2 To the extent allowed by the
                              governmental agency, and where available, copies
                              of the MSAG shall be provided within three
                              business days from the time requested and
                              provided on diskette, magnetic tape, or in a
                              format suitable for use with desktop computers.

                              6.1.1.10.3 CLEC shall be solely responsible for
                              providing CLEC database records to Sprint for
                              inclusion in Sprint's ALI database on a timely
                              basis.

                              6.1.1.10.4 Sprint and CLEC shall arrange for the
                              automated input and periodic updating of the E911
                              database information related to CLEC end users.
                              Sprint shall work cooperatively with CLEC to
                              ensure the accuracy of the data transfer by
                              verifying it against the Master Street Address
                              Guide (MSAG).   Sprint shall accept
                              electronically transmitted files or magnetic tape
                              that conform to National Emergency Number
                              Association (NENA) Version #2 format.

                              6.1.1.10.5 CLEC shall assign an E911 database
                              coordinator charged with the responsibility of
                              forwarding CLEC end user ALI record information
                              to Sprint or via a third-party entity, charged
                              with the responsibility of ALI record transfer.
                              CLEC assumes all responsibility for the accuracy
                              of the data that CLEC provides to Sprint.

                              6.1.1.10.6 CLEC shall provide information on new
                              subscribers to Sprint within one (1) business day
                              of the order completion.   Sprint shall update
                              the database within two (2) business days of
                              receiving the data from CLEC.   If Sprint detects
                              an error in the CLEC provided data, the data
                              shall be returned to CLEC within two (2) business
                              days from when it was provided to Sprint.   CLEC
                              shall respond to requests from Sprint to make
                              corrections to database record errors by
                              uploading corrected records within two (2)
                              business days.   Manual entry shall be allowed
                              only in the event that the system is not
                              functioning properly.

                              6.1.1.10.7 Sprint agrees to treat all data on
                              CLEC subscribers provided under this Agreement as
                              strictly




<PAGE>   137


                              confidential and to use data on CLEC subscribers
                              only for the purpose of providing E911 services.

                              6.1.1.10.8 Sprint shall adopt use of a CLEC Code
                              (NENA standard five-character field) on all ALI
                              records received from CLEC.   The CLEC Code will
                              be used to identify the CLEC of record in INP
                              configurations.   The NENA CLEC Code for CLEC is
                              "CLEC".

                              6.1.1.10.9 Sprint shall identify which ALI
                              databases cover which states, counties or parts
                              thereof, and identify and communicate a Point of
                              Contact for each.

                        6.1.1.11 The following are basic 911 and E911 Network
                        Requirements:

                              6.1.1.11.1 Sprint, at CLEC's option, shall
                              provide a minimum of two (2) E911 trunks per
                              Numbering Plan Area (NPA) code, or that quantity
                              which will maintain P.01 transmission grade of
                              service, whichever is the higher grade of
                              service.   These trunks will be dedicated to
                              routing 911 calls from CLEC's switch to a Sprint
                              selective router.

                              6.1.1.11.2 Sprint shall provide the selective
                              routing of E911 calls received from CLEC's
                              switching office.   This includes the ability to
                              receive the ANI of CLEC's subscriber, selectively
                              route the call to the appropriate PSAP, and
                              forward the subscriber's ANI to the PSAP.
                              Sprint shall provide CLEC with the appropriate
                              CLLI codes and specifications regarding the
                              tandem serving area associated addresses and
                              meet-points in the network.

                              6.1.1.11.3 Copies of Selective Routing Boundary
                              Maps shall be available to CLEC.   Each map shows
                              the boundary around the outside of the set of
                              exchange areas served by that selective router.
                              The map provides CLEC the information necessary
                              to set up its network to route E911 callers to
                              the correct selective router.

                              6.1.1.11.4 CLEC shall ensure that its switch
                              provides an eight-digit ANI consisting of an
                              information digit and the seven-digit exchange
                              code.   CLEC shall also ensure that its switch
                              provides the line number of the calling station.
                              Where applicable, CLEC shall send a ten-digit
                              ANI to Sprint.




<PAGE>   138


                              6.1.1.11.5 Each ALI discrepancy report shall be
                              jointly researched by Sprint and CLEC.
                              Corrective action shall be taken immediately by
                              the responsible party.

                              6.1.1.11.6 Where Sprint controls the 911 network,
                              Sprint should provide CLEC with a detailed
                              written description of, but not limited to, the
                              following information:

                                    6.1.1.11.6.1 Geographic boundaries of the
                                    government entities, PSAPs, and exchanges
                                    as necessary.

                                    6.1.1.11.6.2 LECs rate centers/exchanges,
                                    where "Rate Center" is defined as a
                                    geographically specified area used for
                                    determining mileage dependent rates in the
                                    Public Switched Telephone Network.

                                    6.1.1.11.6.3 Technical specifications for
                                    network interface, Technical specifications
                                    for database loading and maintenance.

                              6.1.1.11.7 Sprint shall identify special routing
                              arrangements to complete overflow.

                              6.1.1.11.8 Sprint shall begin restoration of E911
                              and/or E911 trunking facilities immediately upon
                              notification of failure or outage.   Sprint must
                              provide priority restoration of trunks or
                              networks outages on the same terms/conditions it
                              provides itself and without the imposition of
                              Telecommunications Service Priority (TSP).

                              6.1.1.11.9 Sprint shall identify any special
                              operator-assisted calling requirements to support
                              911.

                              6.1.1.11.10 Trunking shall be arranged to
                              minimize the likelihood of central office
                              isolation due to cable cuts or other equipment
                              failures.   There will be an alternate means of
                              transmitting a 911 call to a PSAP in the event of
                              failures.

                              6.1.1.11.11 Circuits shall have interoffice, loop
                              and CLEC system diversity when such diversity can
                              be achieved using existing facilities.   Circuits
                              will be divided as equally as possible across
                              available CLEC systems.  Diversity will be
                              maintained or upgraded to utilize the highest
                              level of diversity available in the network.




<PAGE>   139


                              6.1.1.11.12 Repair service shall begin
                              immediately upon receipt of a report of a
                              malfunction.   Repair service includes testing
                              and diagnostic service from a remote location,
                              dispatch of or in-person visit(s) of personnel.
                              Technicians will be dispatched without delay.

                              6.1.1.11.13 All 911 trunks must be capable of
                              transmitting and receiving Baudot code or ASII
                              necessary to support the use of
                              Telecommunications Devices for the Deaf
                              (TTY/TDDs).

                        6.1.1.12 Basic 911 and E911 Additional Requirements

                              6.1.1.12.1 All CLEC lines that have been ported
                              via INP shall reach the correct PSAP when 911 is
                              dialed.   Sprint shall send both the ported
                              number and the CLEC number (if both are received
                              from CLEC).   The PSAP attendant shall see both
                              numbers where the PSAP is using a standard ALI
                              display screen and the PSAP extracts both numbers
                              from the data that is sent.

                              6.1.1.12.2 Sprint shall work with the appropriate
                              government agency to provide CLEC the ten-digit
                              POTS number of each PSAP which sub-tends each
                              Sprint selective router 911 tandem to which CLEC
                              is interconnected.

                              6.1.1.12.3 Sprint shall notify CLEC 48 hours in
                              advance of any scheduled testing or maintenance
                              affecting CLEC 911 service, and provide
                              notification as soon as possible of any
                              unscheduled outage affecting CLEC 911 service.

                              6.1.1.12.4 CLEC shall be responsible for
                              reporting all errors, defects and malfunctions to
                              Sprint.   Sprint shall provide CLEC with the
                              point of contact for reporting errors, defects,
                              and malfunctions in the service and shall also
                              provide escalation contacts.

                              6.1.1.12.5 CLEC may enter into subcontracts with
                              third parties, including CLEC Affiliates, for the
                              performance of any of CLEC's duties and
                              obligations stated herein.




<PAGE>   140


                              6.1.1.12.6 Sprint shall provide sufficient
                              planning information regarding anticipated moves
                              to SS7 signaling, for 911 services, for the next
                              12 months.

                              6.1.1.12.7 Sprint shall provide notification of
                              any impacts to the 911 services provided by
                              Sprint to CLEC resulting from of any pending
                              tandem moves, NPA splits, or scheduled
                              maintenance outages, with enough time to react.

                              6.1.1.12.8 Sprint shall identify process for
                              handling of "reverse ALI" inquiries by public
                              safety entities.

                              6.1.1.12.9 Sprint shall establish a process for
                              the management of NPA splits by populating the
                              ALI database with the appropriate new NPA codes.

                              6.1.1.12.10 Sprint must provide the ability for
                              CLEC to update 911 databases with end user
                              information for lines that have been ported via
                              INP or NP.

                  6.1.2 Directory Assistance Service

                        6.1.2.1 Sprint shall provide for the routing of
                        directory assistance calls (including but not limited
                        to 411, 555-1212, NPA-555-1212) dialed by CLEC
                        subscribers directly to, at CLEC's option, either (a)
                        the CLEC DA service platform to the extent Sprint's
                        switch can perform this customized routing, or (b)
                        Sprint DA service platform to the extent there is a DA
                        service platform for that serving area.

                        6.1.2.2 CLEC subscribers shall be provided the
                        capability by Sprint to dial the same telephone numbers
                        for access to CLEC Directory Assistance that Sprint
                        subscribers dial to access Sprint Directory Assistance.

                        6.1.2.3 Sprint shall provide Directory Assistance
                        functions and services to CLEC for its subscribers as
                        described below until Sprint routes calls to the CLEC
                        Directory Assistance Services platform.

                              6.1.2.3.1 Sprint agrees to provide CLEC
                              subscribers with the same Directory Assistance
                              service available to Sprint subscribers.

                              6.1.2.3.2 Sprint shall notify CLEC in advance of
                              any changes or enhancements to its DA service,
                              and shall make




<PAGE>   141


                              available such service enhancements on a
                              non-discriminatory basis to CLEC.

                              6.1.2.3.3 Sprint shall provide Directory
                              Assistance to CLEC subscribers in accordance with
                              Sprint's internal local operator procedures and
                              standards.

                              6.1.2.3.4 Sprint shall provide CLEC with the same
                              level of support for the provisioning of
                              Directory Assistance as Sprint provides itself.
                              Quality of service standards shall be measured at
                              the aggregate level in accordance with standards
                              and performance measurements that are at parity
                              with the standards and/or performance
                              measurements that Sprint uses and/or which are
                              required by law, regulatory agency, or by
                              Sprint's own internal procedures, whichever are
                              the most rigorous.

                              6.1.2.3.5 Service levels shall comply, at a
                              minimum, with State Regulatory Commission
                              requirements for number of rings to answer,
                              average work time, and disaster recovery options.

                              6.1.2.3.6 CLEC or its designated representatives
                              may inspect any Sprint owned or sub-contracted
                              office, which provides DA services, upon five (5)
                              business days notice to Sprint.

                              6.1.2.3.7 Directory Assistance services provided
                              by Sprint to CLEC subscribers shall be branded in
                              accordance with Section 11 of Part A of this
                              Agreement.

                              6.1.2.3.8 Sprint shall provide the following
                              minimum Directory Assistance capabilities to
                              CLEC's subscribers:

                                    6.1.2.3.8.1 A maximum of two subscriber
                                    listings and/or addresses or Sprint parity
                                    per CLEC subscriber request.

                                    6.1.2.3.8.2 Telephone number and address to
                                    CLEC subscribers upon request, except for
                                    non-published/unlisted numbers, in the same
                                    states where such information is provided
                                    to Sprint subscribers.

                                    6.1.2.3.8.3 Upon CLEC's request, call
                                    completion to the requested number for
                                    local and intraLATA toll




<PAGE>   142


                                    calls shall be sent to the network
                                    specified by CLEC where such call
                                    completion routing is technically feasible.
                                    If fulfillment of such routing request is
                                    not technically feasible, Sprint shall
                                    promptly notify CLEC if and when such
                                    routing becomes technically feasible.
                                    Rating and billing responsibility shall be
                                    agreed to by CLEC and Sprint.

                                    6.1.2.3.8.4 Populate the Directory
                                    Assistance database in the same manner and
                                    in the same time frame as for Sprint
                                    subscribers.

                                    6.1.2.3.8.5 Any information provided by a
                                    Directory Assistance Automatic Response
                                    Unit (ARU) shall be repeated the same
                                    number of times for CLEC subscribers as for
                                    Sprint's subscribers.

                        6.1.2.4 Sprint shall provide CLEC call detail records
                        in a mutually agreed format and manner.

                  6.1.3 Operator Services

                        6.1.3.1 Sprint shall provide for the routing of local
                        operator services calls (including but not limited to
                        0+, 0-) dialed by CLEC subscribers directly to either
                        the CLEC operator service platform or Sprint operator
                        service platform to the extent Sprint's switch can
                        perform this customized routing, as specified by CLEC.

                        6.1.3.2 CLEC subscribers shall be provided the
                        capability by Sprint to dial the same telephone numbers
                        to access CLEC operator service that Sprint subscribers
                        dial to access Sprint operator service.

                        6.1.3.3 Sprint shall provide Operator Services to as
                        described below until, at CLEC's discretion, Sprint
                        routes calls to the CLEC Local Operator Services
                        platform.

                              6.1.3.3.1 Sprint agrees to provide CLEC
                              subscribers the same Operator Services available
                              to Sprint subscribers.   Sprint shall make
                              available its service enhancements on a
                              non-discriminatory basis.

                              6.1.3.3.2 Operator Services provided to CLEC
                              subscribers shall be branded in accordance with
                              Section 11 of Part A of this Agreement.




<PAGE>   143


                              6.1.3.3.3 Sprint shall provide the following
                              minimum Operator Service capabilities to CLEC
                              subscribers:

                                    6.1.3.3.3.1 Sprint shall complete 0+ and 0-
                                    dialed local calls.

                                    6.1.3.3.3.2 Sprint shall complete 0+
                                    intraLATA toll calls.

                                    6.1.3.3.3.3 Sprint shall complete calls
                                    that are billed to a 0+ access calling
                                    card.

                                    6.1.3.3.3.4 Sprint shall complete
                                    person-to-person calls.

                                    6.1.3.3.3.5 Sprint shall complete collect
                                    calls.

                                    6.1.3.3.3.6 Sprint shall provide the
                                    capability for callers to bill to a third
                                    party and complete such calls.

                                    6.1.3.3.3.7 Sprint shall complete
                                    station-to-station calls.

                                    6.1.3.3.3.8 Sprint shall process emergency
                                    calls.

                                    6.1.3.3.3.9 Sprint shall process Busy Line
                                    Verify and Busy Line Verify and Interrupt
                                    requests.

                                    6.1.3.3.3.10 To the extent not prohibited
                                    by law or regulation, Sprint shall process
                                    emergency call trace.

                                    6.1.3.3.3.11 Sprint shall process
                                    operator-assisted directory assistance
                                    calls.

                                    6.1.3.3.3.12 Sprint shall provide basic
                                    rate quotes, subject to Sprint's operator
                                    systems being capable to perform unique
                                    rating for CLEC.

                                    6.1.3.3.3.13 Sprint shall process
                                    time-and-charges requests, at parity with
                                    Sprint's own service offerings.

                                    6.1.3.3.3.14 Sprint shall route 0- traffic
                                    directly to a "live" operator team.




<PAGE>   144


                                    6.1.3.3.3.15 When requested by CLEC, Sprint
                                    shall provide instant credit on operator
                                    services calls as provided to Sprint
                                    subscribers or shall inform CLEC
                                    subscribers to call an 800 number for CLEC
                                    subscriber service to request a credit.
                                    Sprint shall provide one 800 number for
                                    business subscribers and another for
                                    residential subscribers.

                                    6.1.3.3.3.16 Caller assistance for the
                                    disabled shall be provided in the same
                                    manner as provided to Sprint subscribers.

                                    6.1.3.3.3.17 When available, Sprint shall
                                    provide operator-assisted conference
                                    calling.

                        6.1.3.4 Operator Service shall provide CLEC's local
                        usage rates when providing rate quote and
                        time-and-charges services, and subject to Section
                        6.1.3.3.3.13 above.

                        6.1.3.5 Operator Service shall adhere to equal access
                        requirements.

                        6.1.3.6 Sprint shall exercise the same level of fraud
                        control in providing Operator Service to CLEC that
                        Sprint provides for its own operator service.

                        6.1.3.7 Sprint shall query for Billed Number Screening
                        restrictions when handling Collect, Third Party, and
                        Calling Card Calls, both for station to station and
                        person to person call types.

                        6.1.3.8 Sprint shall provide at an aggregate level for
                        the operator service center, service measurements and
                        accounting reports to CLEC at parity with the service
                        measurements and accounting reports Sprint provides
                        itself or as otherwise mutually agreed by the parties.

                        6.1.3.9 CLEC or its designated representatives may
                        inspect any Sprint owned or sub-contracted office,
                        which provides Operator Services, upon five (5)
                        business days notice to Sprint.

                        6.1.3.10 Sprint shall direct CLEC subscriber account
                        and other similar inquiries to the subscriber service
                        center designated by CLEC.




<PAGE>   145


                        6.1.3.11 Sprint shall provide call records in
                        accordance with Section 4 of this Attachment VIII.

                        6.1.3.12 Sprint shall accept and process overflow 911
                        traffic routed from CLEC to the underlying platform
                        used to provide Operator Service where such overflow is
                        performed by Sprint for its subscribers.

                        6.1.3.13 Busy Line Verification and Busy Line Verify
                        and Interrupt:

                              6.1.3.13.1 Sprint shall permit CLEC to connect
                              its Local Operator Service to Sprint's Busy Line
                              Verification and Busy Line Verify and Interrupt
                              ("BLV/BLVI").

                              6.1.3.13.2 Sprint shall engineer its BLV/BLVI
                              facilities to accommodate the anticipated volume
                              of BLV/BLVI requests during the Busy Hour.   CLEC
                              may, from time to time, provide its anticipated
                              volume of BLV/BLVI requests to Sprint.   In those
                              instances when the BLV/BLVI systems and databases
                              become unavailable, Sprint shall promptly inform
                              CLEC.

                  6.1.4 Directory Assistance and Listings Service Requests

                        6.1.4.1 These requirements pertain to Sprints DA and
                        Listings Service Request process that enables CLEC to
                        (a) submit CLEC subscriber information for inclusion in
                        Sprint Directory Assistance and Directory Listings
                        databases; (b) submit CLEC subscriber information for
                        inclusion in published directories; and (c) provide
                        CLEC subscriber delivery address information to enable
                        Sprint to fulfill directory distribution obligations.

                              6.1.4.1.1 Sprint shall accept orders on a
                              real-time basis via electronic interface in
                              accordance with OBF Directory Service Request
                              standards within 3 months of the effective date
                              of this Agreement.   In the interim, Sprint shall
                              create a standard format and order process by
                              which CLEC can place an order with a single point
                              of contact within Sprint.

                              6.1.4.1.2 Sprint will provide to CLEC the
                              following Directory Listing Migration Options,
                              valid under all access methods, including but not
                              limited to, Resale, Unbundled Network Elements
                              and Facilities-Based:

                                    6.1.4.1.2.1 Migrate with no Changes:
                                    Retain all white page listings for the
                                    subscriber in both DA and




<PAGE>   146


                                    DL.   Transfer ownership and billing for
                                    white page listings to CLEC.

                                    6.1.4.1.2.2 Migrate with Additions:
                                    Retain all white page listings for the
                                    subscriber in both DA and DL.   Incorporate
                                    the specified additional listings order.
                                    Transfer ownership and billing for the
                                    white page listings to CLEC.

                                    6.1.4.1.2.3 Migrate with Deletions:
                                    Retain all white page listings for the
                                    subscriber in both DA and DL.   Delete the
                                    specified listings from the listing order.
                                    Transfer ownership and billing for the
                                    white page listings to CLEC.

                                    6.1.4.1.2.4 To ensure accurate order
                                    processing, Sprint or its directory
                                    publisher shall provide to CLEC the
                                    following information, with updates
                                    promptly upon changes:

                                           6.1.4.1.2.4.1 A matrix of NXX to
                                           central office

                                           6.1.4.1.2.4.2 Geographical maps if
                                           available of Sprint service area

                                           6.1.4.1.2.4.3 A description of
                                           calling areas covered by each
                                           directory, including but not limited
                                           to maps of calling areas and
                                           matrices depicting calling
                                           privileges within and between
                                           calling areas

                                           6.1.4.1.2.4.4 Listing format rules

                                           6.1.4.1.2.4.5 Listing alphabetizing
                                           rules

                                           6.1.4.1.2.4.6 Standard abbreviations
                                           acceptable for use in listings and
                                           addresses

                                           6.1.4.1.2.4.7 Titles and
                                           designations

                                           6.1.4.1.2.4.8 A list of all
                                           available directories and their
                                           Business Office close dates




<PAGE>   147


                              6.1.4.1.3 Based on changes submitted by CLEC,
                              Sprint shall update and maintain directory
                              assistance and directory listings data for CLEC
                              subscribers who:

                                6.1.4.1.3.1  Disconnect Service

                                6.1.4.1.3.2  Change CLEC

                                6.1.4.1.3.3  Install Service

                                6.1.4.1.3.4 Change any service which
                                affects DA information

                                6.1.4.1.3.5 Specify Non-Solicitation

                                6.1.4.1.3.6 Are Non-Published, Non-Listed,
                                    or Listed

                              6.1.4.1.4 Sprint shall not charge for storage of
                              CLEC subscriber information in the DA and DL
                              systems.

                              6.1.4.1.5 CLEC shall not charge for storage of
                              Sprint subscriber information in the DA and DL
                              systems.

                  6.1.5 Directory Listings General Requirements.   CLEC
                  acknowledges that many directory functions including but not
                  limited to yellow page listings, enhanced white page
                  listings, information pages, directory proofing, and yellow
                  pages directory distribution are not performed by Sprint but
                  rather are performed by and are under the control of the
                  directory publisher.   Sprint shall use reasonable efforts to
                  assist CLEC in obtaining an agreement with the directory
                  publisher that treats CLEC at parity with the publisher's
                  treatment of Sprint.

                        6.1.5.1 This Section 6.1.5 pertains to listings
                        requirements published in the traditional white pages.

                        6.1.5.2 Sprint shall include in its master subscriber
                        system database all white pages listing information for
                        CLEC subscribers in Sprint territories where CLEC is
                        providing local telephone exchange services.

                        6.1.5.3 Sprint agrees to include one basic White pages
                        listing for each CLEC customer located within the
                        geographic scope of its White Page directories, at no
                        additional charge to CLEC.   A basic White Pages
                        listing is defined as a customer name, address and
                        either the CLEC assigned number for a customer or the
                        number for




<PAGE>   148


                        which number portability is provided, but not both
                        numbers.   Basic White Pages listings of CLEC customers
                        will be interfiled with listings of Sprint and other
                        LEC customers.

                        6.1.5.4 CLEC agrees to provide CLEC customer listing
                        information, including without limitation directory
                        distribution information, to Sprint, at no charge.
                        Sprint will provide CLEC with the appropriate format
                        for provision of CLEC customer listing information to
                        Sprint.   The parties agree to adopt a mutually
                        acceptable electronic format for the provision of such
                        information as soon as practicable.   In the event OBF
                        adopts an industry-standard format for the provision of
                        such information, the parties agree to adopt such
                        format.

                        6.1.5.5 Sprint agrees to provide White Pages database
                        maintenance services to CLEC.   CLEC will be charged a
                        Service Order entry fee upon submission of Service
                        Orders into Sprint's Service Order Entry System, which
                        will include compensation for such database maintenance
                        services.   Service Order entry fees apply when Service
                        Orders containing directory records are entered into
                        Sprint's Service Order Entry System initially, and when
                        Service Orders are entered in order to process a
                        requested change to directory records.

                        6.1.5.6 CLEC customer listing information will be used
                        solely for the provision of directory services,
                        including the sale of directory advertising to CLEC
                        customers.

                        6.1.5.7 In addition to a basic White Pages listing,
                        Sprint will provide, at the rates set forth in
                        Attachment II of this Agreement, tariffed White Pages
                        listings (e.g., additional, alternate, foreign and
                        non-published listings) for CLEC to offer for resale to
                        CLEC's customers.

                        6.1.5.8 Sprint agrees to provide White Pages
                        distribution services to CLEC customers within Sprint's
                        service territory at no additional charge to CLEC.
                        Sprint represents that the quality, timeliness, and
                        manner of such distribution services will be at parity
                        with those provided to Sprint and to other CLEC
                        customers.

                        6.1.5.9 Sprint agrees to include critical contact
                        information pertaining to CLEC in the "Information
                        Pages" of those of its White Pages directories covering
                        markets in which CLEC is providing or plans to commence
                        providing local exchange service during the publication
                        cycle of such directories.   Critical contact
                        information




<PAGE>   149


                        includes CLEC's business office number, repair number,
                        billing information number, and any other information
                        required to comply with applicable regulations, but not
                        advertising or purely promotional material.   CLEC will
                        not be charged for inclusion of its critical contact
                        information.   The format, content and appearance of
                        CLEC's critical contact information will conform to
                        applicable Sprint and/or directory publisher guidelines
                        and will be consistent with the format, content and
                        appearance of critical contact information pertaining
                        to all CLECs in a directory.

                        6.1.5.10 Sprint will accord CLEC customer listing
                        information the same level of confidentiality that
                        Sprint accords it own proprietary customer listing
                        information.   Sprint shall ensure that access to CLEC
                        customer proprietary listing information will be
                        limited solely to those of Sprint and Sprint's
                        directory publisher's employees, agents and contractors
                        that are directly involved in the preparation of
                        listings, the production and distribution of
                        directories, and the sale of directory advertising.
                        Sprint will advise its own employees, agents and
                        contractors and its directory publisher of the
                        existence of this confidentiality obligation and will
                        take appropriate measures to ensure their compliance
                        with this obligation.   Notwithstanding any provision
                        herein to the contrary, the furnishing of White Pages
                        proofs to a CLEC that contains customer listings of
                        both Sprint and CLEC will not be deemed a violation of
                        this confidentiality provision.

                        6.1.5.11 Sprint will include Carrier's customer listing
                        information upon request of any third parties to
                        purchase Sprint's customer listing information.   Upon
                        receipt of such requests, Sprint and Carrier will work
                        cooperatively to address any payments for the sale or
                        license of Carrier customer listing information to
                        third parties.   Any payments due to Carrier for its
                        customer listing information will be net of
                        administrative expenses incurred by Sprint in providing
                        such information to third parties.   Sprint will
                        compensate Carrier on an annual basis.   The parties
                        advantaged that the release of Carrier's customer
                        listing information to Sprint directory publisher will
                        not constitute the sale or license of Carrier customer
                        listing information causing any payment obligation to
                        arise pursuant to this subsection 6.1.5.11.

                  6.1.6 Other Directory Services.   Sprint will exercise
                  reasonable efforts to cause its directory publisher to enter
                  into a separate agreement with CLEC which will address other
                  directory services desired by CLEC as described in this
                  Section 6.1.6.   Both parties acknowledge that Sprint's
                  directory publisher is not a party to this Agreement and that
                  the provisions




<PAGE>   150


                  contained in this Section 6.1.6 are not binding upon Sprint's
                  directory publisher.

                        6.1.6.1 Sprint's directory publisher will negotiate
                        with CLEC concerning the provision of a basic Yellow
                        Pages listing to CLEC customers located within the
                        geographic scope of publisher's Yellow Pages
                        directories and distribution of Yellow Pages
                        directories to CLEC customers.

                        6.1.6.2 Directory advertising will be offered to CLEC
                        customers on a nondiscriminatory basis and subject to
                        the same terms and conditions that such advertising is
                        offered to Sprint and other CLEC customers.   Directory
                        advertising will be billed to CLEC customers by
                        directory publisher.

                        6.1.6.3 Directory publisher will use commercially
                        reasonable efforts to ensure that directory advertising
                        purchased by customers who switch their service to
                        CLECs is maintained without interruption.

                        6.1.6.4 Information pages, in addition to any
                        information page or portion of an information page
                        containing critical contact information as described
                        above in Section 6.1.5.9 may be purchased from Sprint's
                        directory publisher, subject to applicable directory
                        publisher guidelines and regulatory requirements.

                        6.1.6.5 Directory publisher maintains full authority as
                        publisher over its publishing policies, standards and
                        practices, including decisions regarding directory
                        coverage area, directory issue period, compilation,
                        headings, covers, design, content or format of
                        directories, and directory advertising sales.

                  6.1.7 Directory Assistance Data

                        6.1.7.1 This section refers to the residential,
                        business, and government subscriber records used by
                        Sprint to create and maintain databases for the
                        provision of live or automated operator assisted
                        Directory Assistance.   Directory Assistance Data is
                        information that enables telephone exchange CLECs to
                        swiftly and accurately respond to requests for
                        directory information, including, but not limited to
                        name, address and phone numbers.   Under the provisions
                        of the Act and the FCC's Interconnection order, Sprint
                        shall provide unbundled and non-discriminatory access
                        to the residential, business and government subscriber
                        records used by Sprint to create and maintain databases
                        for the provision of live or automated operator
                        assisted Directory Assistance.   CLEC may




<PAGE>   151


                        combine this element with any other Network Element for
                        the provision of any Telecommunications Service.

                        6.1.7.2 Sprint shall provide an initial load of
                        subscriber records via magnetic tape for Sprint,
                        included in its Directory Assistance Database within
                        sixty (60) days of the Effective Date of this
                        Agreement.   The NPAs included shall represent the
                        entire Sprint operating region.   The initial load
                        shall reflect all data that is current as of one
                        business day prior to the provision date.

                        6.1.7.3 Sprint shall provide CLEC a complete list of
                        LECs, CLECs, and independent Telcos that provided data
                        to Sprint for its DA database.

                        6.1.7.4 All directory assistance data shall be provided
                        in a mutually agreed format.

                        6.1.7.5 On the same schedule that Sprint updates its
                        database Sprint shall provide updates (end user and
                        mass) to the Directory Assistance Database via
                        electronic data transfer.   Updates shall be current as
                        of one business day prior to the date provided to CLEC.

                        6.1.7.6 DA data shall specify whether the subscriber is
                        a residential, business, or government subscriber, to
                        the extent Sprint so marks its own DA database records
                        with such indication.   Additionally, data must include
                        all levels of indentation and all levels of information
                        specified in "Directory Assistance Data Information
                        Exchanges and Interfaces" below, to the extent Sprint's
                        data is so formatted.

                        6.1.7.7 CLEC shall pay to Sprint charges for DA
                        listings and updates that are developed consistent with
                        the Act.

                        6.1.7.8 Sprint shall provide complete refresh of the DA
                        data upon request by CLEC and at CLEC's expense.

                        6.1.7.9 CLEC will designate the location to which the
                        data will be provided, and CLEC shall order DA data
                        from Sprint at a state/company level.

6.2  SYSTEMS INTERFACES AND EXCHANGES



<PAGE>   152

     6.2.1   Directory Assistance Data Information Exchanges and Interfaces
             6.2.1.1         Subscriber List Information

                              6.2.1.1.1 Sprint shall provide to CLEC, within
                              sixty (60) days after the Approval Date of this
                              Agreement, or at CLEC's request, all published
                              Subscriber List Information (including such
                              information that resides in Sprint's master
                              subscriber system/accounts master file for the
                              purpose of publishing directories in any format
                              as specified by the Act) via an electronic data
                              transfer medium and in a mutually agreed to
                              format, on the same terms and conditions and at
                              the same rates that the Sprint provides
                              Subscriber List Information to itself or to other
                              third parties.   All changes to the Subscriber
                              List Information shall be provided to CLEC
                              pursuant to a mutually agreed format and
                              schedule.   Both the initial List and all
                              subsequent Lists shall indicate for each
                              subscriber whether the subscriber is classified
                              as residence or business class of service.

                              6.2.1.1.2 CLEC shall provide directory listings
                              to Sprint pursuant to the directory listing and
                              delivery requirements in the approved OBF format,
                              at a mutually agreed upon timeframe.   Other
                              formats and requirements shall not be used unless
                              mutually agreed to by the parties.

                        6.2.1.2 This section addresses data format requirements
                        and data inclusion requirements for directory
                        assistance data information exchange between Sprint and
                        CLEC.   Sprint shall provide CLEC the following where
                        available:

                              6.2.1.2.1 List of NPA-NXXs relating to the
                              listing records being provided.

                              6.2.1.2.2 List of Directory Section names and
                              their associated NPA-NXX's.

                              6.2.1.2.3 List of Community Names expected to be
                              associated with each of the NPA-NXX's for which
                              listing records shall be provided.

                              6.2.1.2.4 List of Independent Company names and
                              their associated NPA-NXXs for which their listing
                              data is a part of




<PAGE>   153


                              Sprint's directory database, but Sprint is not to
                              provide the listing data to CLEC under this
                              request.

                              6.2.1.2.5 Listing volume totals by directory
                              section, NPA, and state.

                              6.2.1.2.6 Average daily update volume by
                              directory section, NPA, and state.

                              6.2.1.2.7 Identify any area wide or universal
                              service numbers which may be listed.   Identify
                              the telephone number to be provided to callers
                              outside the servicing area.

                              6.2.1.2.8 Identify any listing condition(s)
                              unique to Sprint's serving area which may require
                              special handling in data processing in the
                              directory.   Indented Listings (Captions) should
                              be identified and delivered and/or handled as
                              specified.

                        6.2.1.3 Considerations Relating to an Indented Listing
                        (Caption) Set Requirements

                              6.2.1.3.1 Use of line numbers, or other methods,
                              to ensure the integrity of the caption set and
                              identify the sequence or placement of a listing
                              record within the caption set.   A sufficient
                              range of numbers between listing records is
                              required to allow for the expansion of the
                              caption set.   A method is also required to
                              permit the caption header record to be
                              identified, but each level of indent is not
                              required to be recapped; placement of the indent
                              is based on line number.   This method does
                              require stringent edits to ensure the integrity
                              of the caption set.

                              6.2.1.3.2 Use of guideline or recapped data to
                              identify previously established header and
                              sub-header records for placement of data within
                              the caption set.   This permits flexibility to
                              easily expand the caption set.   This method also
                              requires that, in addition to the caption header
                              record, each level of indent be recapped in order
                              to properly build the caption set.

                              6.2.1.3.3 CLEC requires listing instruction codes
                              on the service order which indicate how the set
                              is to appear in the published directory.



<PAGE>   154


                        6.2.1.4 Data Processing Requirements:   Sprint and CLEC
                        shall mutually agree to standards on the following data
                        processing requirements:

                              6.2.1.4.1 Identify type of tape to be used in
                              sending the test and initial load data.   For
                              example, reel or cartridge tape.   Due to the
                              size of an initial load, it would be generally
                              expected to be on tape and the daily update
                              activity via another media, and via a mutually
                              agreed to timeframe, such as NDM.

                              6.2.1.4.2 Identify tape or dataset label
                              requirements.

                              6.2.1.4.3 Identify tracking information
                              requirements.   For example, use of header and
                              trailer records for tracking date and time, cycle
                              numbers, sending and receiving site codes, volume
                              count for the given tape/dataset.   It may also
                              be helpful to have some filler fields for future
                              use.

                              6.2.1.4.4 Identify dates on which the other party
                              should not expect to receive daily update
                              activity.

                              6.2.1.4.5 Data should be received in uppercase
                              and lowercase pursuant to OBF standards.   An
                              asterisk (*) should be used to advise of the need
                              to apply the reverse capitalization rule.
                              However, if the provider determines to provide
                              the listing data from a database that has already
                              messaged the data and applied the capitalization
                              rules, the asterisk may be omitted.

                              6.2.1.4.6 Identify information that shall enable
                              CLEC to identify listings within an indented list
                              (caption) set.   For example:

                                    6.2.1.4.6.1 When a particular listing has
                                    been designated to be filed as the first
                                    listing for a given level (0-7) of indent -
                                    usually out of alpha sequence.

                                    6.2.1.4.6.2 When an alternate call listing
                                    (e.g.  If no answer) relates to multiple
                                    preceding listings of the same level.

                              6.2.1.4.7 Identify any other pertinent
                              information needed to properly process the data.




<PAGE>   155

                     6.2.1.5  Listing Types


<TABLE>
<S>                        <C>
LISTED                     The listing information is available for all directory requirements.

NON-LISTED                 The listing information is available to all directory requirements, but the information does not appear
                           in the published street directory.

NON-PUBLISHED              A directory service may confirm, by name and address, the presence of a listing, but the telephone number
                           is not available.   The listing information is not available in either the published directory or
                           directory assistance.
</TABLE>

                     6.2.1.6  Listing Styles

<TABLE>
<CAPTION>
LISTING STYLE                   DESCRIPTION
<S>                          <C>
STRAIGHT LINE                All listing information is formatted in a straight line.   Data generally consists of Name, Address,
                             Community, and Telephone Number.   Additional data may consist of dialing instructions or other general
                             information relating to the listing.

INDENTED LISTING             Formatted with one listing header record and multiple
SET-                         indented listing records.   See detailed description
CAPTION SET                  below.


                     INDENTED LISTING (CAPTION) SET

HEADER RECORD                Contains listed name; address and telephone number
                             data fields are blank.
SUB-HEADER RECORD/           May contain name data only.   Associated
LISTING                      subordinate records are required.

INDENTED NAME                Contains name data, may or may not have address
LISTING                      data, and telephone number data.

INDENTED ADDRESS             Contains address and telephone number data; the
LISTING                      name data text field is blank.
</TABLE>



<PAGE>   156
<TABLE>
<S>                          <C>
LEVEL OF INDENT              Header record is zero (0), sub-header and indented
                             records range from 1 -6.
</TABLE>

                    6.2.1.7  Data Field Elements


         Requirements for Initial Processing and Daily Update Activity

<TABLE>
<CAPTION>
DATA FIELD LENGTH              DATA ELEMENT                    FIELD
<S>                 <C>                                 <C>
ACTION CODE         A = Add I = In                      Required:   1 alpha
                    D = Delete or O = Out               character
RECORD NUMBER       Sequentially assigned number to     Required:   8 digits
                    each record for a given process
                    (test, initial load, or update
                    activity).   Number assignment
                    begins with 00000001 and is
                    incremented by 1 for each record
                    on the file.
NPA                 Area code relating to the           Required:   3 digits
                    directory section the record is
                    to be listed.
COMPANY IDENTIFIER  The 4-character company code as     Required:   4 digits
                    defined in Section 8 of the
                    National Exchange CLEC
                    Association, Inc.  Tariff.
DIRECTORY SECTION   Name of the directory section       Required:   Maximum
                    where the record is to be listed.   of 50 alpha
                                                        characters
LISTING IDENTIFIER  F = Foreign                         Optional:   1 alpha
                    C = Cross-Reference                 character
                    E = Enterprise (WX number
                    requiring operator assistance to
                    connect the call)
                    W = Wide area or universal service
FILE PLACEMENT      B = Business (4)                    Required:   Maximum
                                                        of 3
</TABLE>




<PAGE>   157




<TABLE>
<S>                   <C>                                       <C>
                      R = Residence (1)                         alpha characters
                      G = Government (2)
                      BR = Business & Residence (5)
                      BG = Business & Government (6)
                      BRG = Business, Residence, & Government
                      (7)

LISTING TYPE          L = Listed                                Required:   Maximum
                      N = Non-Listed                            of 2 alpha
                      NP = Non-Published                        characters

ADVANCE LISTING       AVL = Advance Listing                     Optional:   3 alpha
                      This is used when it is very close to     characters
                      the Business Office close date and the
                      service is not actually established but
                      the subscriber needs to be in the
                      directory.   Once the service is
                      established, a second order is placed
                      without the indicator and the listing
                      is established permanently and sent to
                      DA.

LISTING STYLE         S = Straight line                         Required:   2 alpha
                      I = Indented listing set                  characters
                      CH = Caption Header
                      CS = Caption Sub-header
                      An Indented listing relates to either a
                      caption or Straight Line Under (SLU)
                      set listing.

INDENT LEVEL          0      = Non-indented record              Required:   1 digit
                      1 - 6 = Level of indented record

ADDRESS               For example:   123, A-123, 123-1/2        Optional:   Maximum
HOUSE NUMBER                                                    of 20 alphanumeric
                                                                characters,
                                                                including hyphen,
                                                                space, and slash

ADDRESS               For example:   N, S, E, W, NE, SW,        Optonal: Maximum of 5
PRE-DIRECTIONAL       NORTH                                     alpha  characters
</TABLE>




<PAGE>   158




<TABLE>
<S>                   <C>                                   <C>
ADDRESS STREET NAME   For example:   Main,                  Optional:   Maximum
                      Peachtree-Dunwoody, HWY 75 at Exit    of 100 alpha,
                      30                                    alphanumeric
                                                            characters,
                                                            including spaces
                                                            and hyphens.

ADDRESS SUFFIX OR     For example:   SUITE 160, ST, or WAY  Optional: Maximum of 20
THOROUGHFARE                                                numeric, alpha, or
                                                            alphanumeric characters

                                                            Optional:   Maximum
ADDRESS POST                                                of 5 alpha
DIRECTION             For example:   N, S, NE, SW           characters

ADDRESS ZIP CODE      5-digits or ZIP + 4                   Optional:   Maximum
                                                            of 10 digits,
                                                            including the
                                                            hyphen when using
                                                            ZIP + 4

COMMUNITY NAME        Identifies the name of the            Maximum of 50
                      community associated with the         alphanumeric
                      listing record.   See Glossary for    characters,
                      more details.                         including spaces
                                                            and hyphen
                      
STATE NAME            Identifies the state associated       Maximum of 2 alpha 
ABBREVIATION          with the community name;              characters         
                      2-character state abbreviation used                      
                      by the US Postal Office.                                 

INFORMATION TEXT      Miscellaneous information relating    Optional:   Maximum
                      to the listing.   Including, but      of 250 alpha,
                      not limited to, for example:   TOLL   numeric, or
                      FREE DIAL 1 & THEN, CALL COLLECT,     alphanumeric
                      or TDD ONLY.   The various types of   characters
                      Information Text must be identified
                      to CLEC.

NAME - FIRST WORD     Surname of a Residence or Business    Required for a zero
                      listing, or first word of a           (0) level record.
                      Business or Government Listing        Optional if an
                      Multi-word or hyphenated surnames     indented (level
                      should be treated as one word.        1-8) record, unless
                                                            the name text
                                                            present in the
                                                            indented record
                                                            relates to a
                                                            Surname.
                                                            Maximum of 50 alpha,
</TABLE>




<PAGE>   159




<TABLE>
<S>                   <C>                               <C>
                                                        numeric,
                                                        alphanumeric, or
                                                        special characters.

NAME - SUBSEQUENT     Given name and/or initial(s) of   Expected if the
WORD(S)               a Surname listing or Additional   First Word is the
                      word(s) for a Business or         Surname of a
                      Government listing                Residence or
                                                        Business listing.
                                                        Maximum of 250
                                                        alpha, numeric,
                                                        special, or
                                                        alphanumeric
                                                        characters.

LINEAL DESCENT        e.g.  SR, JR, III.   If Lineal    Optional:   Maximum
                      Descent data cannot be uniquely   10 alpha characters
                      identified, it should be
                      included with the Listed Name
                      Subsequent Word(s) data and
                      placed at the end of the name
                      data.

TITLE(s)              e.g.   MRS, LT COL, RET SGR,      Optional:   Maximum
                      DR.   Multiple titles are         of 20 alpha
                      acceptable.   If title data       characters
                      cannot be uniquely identified,
                      it should be included with the
                      Listed Name Subsequent Word(s)
                      data and placed at the end of
                      the name data stream.   If
                      lineal descent is also in the
                      Listed Name Subsequent Word(s)
                      data field, title data should
                      be placed following the lineal
                      descent data.

DEGREE                e.g.   MD, CPA, PHD.   Multiple   Optional:   Maximum
                      degrees are acceptable.   If      of 20 alpha
                      degree data cannot be uniquely    characters
                      identified, it should be
                      included with the Listed Name
                      Subsequent Word(s) data and
                      placed at the end of the name
                      data stream.   If lineal
                      descent and/or title data is
                      also present, it should follow
                      title data.

NICKNAME              Another name the listed           Optional:   Maximum
                      subscriber may be known by.       of 20 alpha
                                                        characters

BUSINESS              Term used to identify the listed  Optional:   Maximum
                                                        of 50
</TABLE>




<PAGE>   160




<TABLE>
<S>                   <C>                   <C>
DESIGNATION           subscriber's          alpha characters
                      professional,
                      business, or
                      location, e.g.
                      ATTY, CARPETS, OFC

STANDARD TELEPHONE    NPA NXX-LINE          Optional:   12
NUMBER *                                    characters,
                                            including space and
                                            hyphen

YELLOW PAGE           CLEC shall provide
PUBLISHERS            to Sprint the code
ASSOCIATION (YPPA)    for the directory
                      in which the
                      listing is to be
                      placed.

NON-STANDARD          Telephone numbers     Optional:   Minimum
TELEPHONE NUMBER *    less than or more     of 1 digit, maximum
                      than the standard     of 22 characters,
                      telephone number.     including spaces
</TABLE>                                    and hyphens

      *Either a Standard or Non-standard telephone is required for a zero level
      record unless the record is a Cross-Reference listing or an Indented
      Listing (caption) Set record.   A telephone number may, or may not be
      present on an Indented Listing Set record for level(s) 0-7.

      6.3 SYSTEMS SECURITY

            6.3.1 Sprint agrees to comply with industry accepted standards
            which in large measure reflect common practices and proven
            technology for protecting computer resources.




<PAGE>   161


                         PART C - ATTACHMENT IX

                          REPORTING STANDARDS

SECTION 1.   GENERAL

      1.1  Sprint shall satisfy all service standards, intervals,
           measurements, specifications, performance requirements, technical
           requirements, and performance standards (Performance Standards) that
           are specified in this agreement or are required by law or
           regulation.   In addition, Sprint's performance under this Agreement
           shall be provided to CLEC will be at Parity with the performance
           Sprint provides itself for like service(s).

      1.2  Sprint and CLEC agree that generally remedies at law alone
           are adequate to compensate CLEC for any failures to meet the
           Performance Standard requirements specified in this Agreement, or
           for failures to provide Customer Usage Data in accordance with this
           Agreement.   However, CLEC shall have the right to seek injunctive
           relief and other equitable remedies to require Sprint (I) to cause
           the service ordered by CLEC to meet the Performance Standards
           specified by the Agreement, (ii) install or provision service
           ordered by CLEC within the Due Dates specified in this Agreement and
           (iii) to provide Customer Usage Data in accordance with this
           Agreement.

      1.3  Sprint and CLEC agree that all financial remedies available
           to end-user and access customers for same or like services will be
           offered to CLEC.   At such time that state or federal
           commission-approved credits/financial remedies are put in place
           between Sprint and any of its CLEC customers, Sprint would
           renegotiate this arrangement where such arrangements exist.

SECTION 2.   PARITY AND QUALITY MEASUREMENTS

      2.1  Sprint will develop self-reporting capabilities comparing
           Sprint results with CLEC results for the following measures of
           service parity within 6 months, but no later than July 1, 1998, of
           the Approval Date :

                  Percentage of Commitment Times Met - Service Order

                  Percentage of Commitment Times Met - Trouble Report

                  Trouble Reports per 100 Access Lines (Resale only)

                  Percent Repeated Trouble Reports




<PAGE>   162


      In the event CLEC chooses to utilize the Sprint operator service platform
      the following measures will be implemented within 6 months of the date of
      first use by CLEC:

                  Average Toll Answer Time

                  Average Directory Assistance Answer Time

            All above measures will be implemented in a manner that is
            consistent with the current measures Sprint makes of its own
            performance.

      2.2  Sprint will develop and implement the following measures no
           later than July 1, 1998:

            PRE-ORDERING/ORDERING/PROVISIONING

                  Prompt Transmission of Customer Service Record (CSR)
                  Information

                  Prompt transmission of Firm Order Confirmation (FOC)

                  PLC Changes Completed Within 24 Hours

            INTERCONNECTION

                  Trunk Orders on or Before the Committed Due Date

                  Firm Order Confirmation (FOC) time delivery

                  Rights of Way (ROW) Conduit and Pole Attachment Availability

                  Trouble Reports per 100 Access Lines (Loops)

            MAINTENANCE AND REPAIR

                  Average Clearing Time - Out of Service

                  Average Call Answer Time - Repair Center

      2.3  Sprint will develop and implement the following measures
           within 1 year, but not later than January 1, 1999 of the Approval
           Date:

            PRE-ORDERING/ORDERING/PROVISIONING



<PAGE>   163


                  Disconnect Order Completion Interval

            BILLING

                  Advance Notice of Late Billing Associated with the Wholesale
                  Bill

                  Delivery of Mechanized Customer Service Record (CSR) for
                  Wholesale Bill Verification

                  Charges Billed in Current Wholesale Bill Period for Flat
                  Rated Services

                  Charges Billed Within 90 days for Usage Charges

                  Financial Accuracy of local OCC Bills

                  Customer Usage Data - File Transfer

                  Customer Usage Data - Timeliness

                  Customer Usage Data - Accuracy

            MAINTENANCE AND REPAIR

                  Percent Reporting Trouble Within 5 Days of the Date Installed



<PAGE>   1

                                                                   EXHIBIT 10.31





- --------------------------------------------------------------------------------

                            STOCK PURCHASE AGREEMENT

                                 by and between

                                KLT TELECOM INC.

                                       and

                             DIGITAL TELEPORT, INC.,

                             Dated December 31, 1996

- --------------------------------------------------------------------------------




<PAGE>   2


                            STOCK PURCHASE AGREEMENT

                  THIS STOCK PURCHASE AGREEMENT (this "Agreement") is entered
into as of December 31, 1996, by and between DIGITAL TELEPORT, INC., a Missouri
corporation (the "Company"), KLT Telecom Inc., a Missouri corporation
("Purchaser") (Purchaser and the Company each a "Party" and together the
"Parties") and, for purposes of Section 8.3, Section 8.4 and Section 9.9 only,
Richard D. Weinstein ("Weinstein").

                                    RECITALS

                  A. The Company wishes to issue and sell to Purchaser 300
shares (the "Purchased Shares") of a new series of voting preferred stock, $.01
par value (the "Preferred Stock") in substantially the form set forth in the
certificate of designations attached as Exhibit A ("Certificate of
Designations"), which will be convertible into 300 shares of the Company's
common stock, $.01 par value (the "Common Stock"), subject to adjustment, on the
terms and subject to the conditions hereinafter set forth, which would, if
issued at Closing, constitute 50% of the outstanding stock of the Company;

                  B. Purchaser wishes to purchase the Purchased Shares, on the
terms and subject to the conditions hereinafter set forth; and

   
                  C. Weinstein owns 100% of the issued and outstanding shares of
the common stock of the Company, consisting of 300 shares of common stock..
    

                  NOW, THEREFORE, in consideration of the recitals and the
mutual covenants, representations, warranties, conditions, and agreement
hereinafter expressed, the Parties agree as follows:

                                    ARTICLE I
                                PURCHASE AND SALE

                  1.1 The Purchased Shares. Upon the terms and subject to the
conditions set forth in this Agreement, at Closing, the Company shall issue and
sell to Purchaser and Purchaser shall purchase and accept from the Company the
Purchased Shares.

                  1.2 Consideration. The consideration that Purchaser shall pay
the Company for the Purchased Shares shall be Forty-Five Million Dollars
($45,000,000) (the "Purchase Price"). The Purchase Price shall be payable in the
following forms:.

                      (a) Cash ("Cash Portion") in an amount equal to the
$45,000,000 less (i) the outstanding principal of, and interest accrued to the
Closing on, the Promissory Note of the Company payable to the Purchaser dated
April 30, 1996, as amended July 16, 1996 and as amended hereby (the "DTI
Promissory Note"), (ii) the amount previously contributed in cash by Purchaser
as capital to KCDT LLC, a Delaware limited liability company ("KCDT"), and 

                                       2
<PAGE>   3

(iii) any outstanding principal of, and interest accrued to the Closing on, any 
loan from the Purchaser to KCDT ("KCDT Loan"). The Cash Portion shall be paid 
as specified in Section 6.5.

                           (b) The contribution, on a non-recourse basis, of the
DTI Promissory Note.

                           (c) The contribution , on a non-recourse basis, of
the KCDT Loan, if existing.

                           (d) The contribution, on a non-recourse basis, of all
of Purchaser's Interest in KCDT (as such term is defined in the Limited
Liability Company Agreement of KCDT LLC ("KCDT Operating Agreement"), including
without limitation the Percentage Interest (as such term is defined the KCDT
Operating Agreement.

                  1.3 Closing. The consummation of the transactions contemplated
hereby (the "Closing") shall take place at the offices of Bryan Cave, 3500 One
Kansas City Place, 1200 Main Street, Kansas City, Missouri 64105, at 10:00 a.m.
local time on February 14, 1997 (the "Closing Date"), or, at such earlier or
later time as the conditions to closing have been satisfied or waived, but in no
event later than March 14, 1997.

                  1.4 Deliveries of the Company at Closing. Subject to the
conditions of the Company's obligations in Article V, on or before the Closing
Date, the Company shall deliver to Purchaser:

                           (a) a certificate executed by the Secretary (the 
"Secretary's Certificate") of the Company in the form and substance of Exhibit 
1.4(a);

                           (b) a certificate executed by the President (the
"Officer's Certificate") of the Company in the form and substance of
Exhibit 1.4(b);

                           (c) a Shareholders Agreement executed by Weinstein
(the "Shareholders Agreement") in the form and substance of Exhibit 1.4(c);

                           (d) an opinion of the Company's counsel (the
"Company's Opinion") in the form and substance of Exhibit 1.4(d);

                           (e) a certificate evidencing and representing the
number of shares of Preferred Stock to be issued to the Company at Closing
(computed by dividing the amount paid in cash, plus the face amount of 
contributions made by KLT at Closing, by $150,000);

                           (f) an executed Stock Purchase Agreement;

                           (g) an Employment Agreement executed by Weinstein
(the "Employment Agreement") in the form and substance of Exhibit 1.4(g);

                           (h) a Guaranty Agreement executed by Weinstein (the
"Guaranty Agreement") in the form and substance of Exhibit 1.4(h);

                           (i) a Stock Pledge Agreement executed by Weinstein
(the "Stock 


                                       3
<PAGE>   4

Pledge Agreement") in the form and substance of Exhibit 1.4(i);

                           (j) an original stock certificate representing all 
the shares owned by Weinstein in the Company;

                           (k) a blank stock power in the name of Purchaser (the
"Stock Power") in the form and substance of Exhibit 1.4(k);

                           (l) a letter from the Missouri Highway and
Transportation Commission ("MHTC"), hereinafter referred to as the "MHTC
letter", stating that the Company is not in material default under that certain
Fiber Optic Cable on Freeways in Missouri Agreement, as amended, between MHTC 
and the Company;

                           (m) a letter from Union Electric Company ("UE"),
hereinafter referred to as the "UE Letter", stating that the Company is not
in material default under that certain Network Services Agreement, as amended,
between UE and the Company, or that certain Agreement for the Provision of
Digital Transport Service, as amended between UE and the Company; provided that
UE shall not have to take any position, and may reserve all rights and remedies,
with respect to matters addressed in that certain letter dated November 18,
1996, from UE to the Company;

                           (n) a letter from MCIMetro Access Transmission
Services, Inc. ("MCI"), hereinafter referred to as the "MCI Letter", stating
that the Company is not in material default under that certain IRU Agreement
between the Company and MCI dated October 3, 1995;

                            (o) an executed Lease Agreement (the "Lease")
between the Company and Weinstein, in the form and substance of Exhibit 1.4(m).

                  1.5 Deliveries of Purchaser at Closing. Subject to the
conditions to Purchaser's obligations in Article IV, at Closing, on or before
the Closing Date, Purchaser shall:

                           (a) make the contributions to the Company specified
in Sections 1.2(b), 1.2(c) and 1.2(d);

                           (b) wire transfer to the Company in immediately
available funds, to an account designated by the Company, up to $4,000,000 (in
the discretion of the Company);

                           (c) deliver to the Company and Weinstein a
Shareholders' Agreement executed by Purchaser;

                           (d) a certificate executed by the Secretary of
Purchaser ("Purchaser Secretary's Certificate") of Purchaser in the form and
substance of Exhibit 1.5(d);

                           (e) a certificate executed by the President of
Purchaser (Purchaser "Officer's Certificate") the form and substance of Exhibit
1.5(e);


                                       4

<PAGE>   5

                                   ARTICLE II

                  REPRESENTATIONS AND WARRANTIES OF THE COMPANY

                  The Company hereby makes the following representations and
warranties to Purchaser; each of which is true and correct on the date hereof:

                  2.1 Enforceable Agreement. The Company has the full legal
right, power and authority to execute and deliver this Agreement, to perform its
obligations hereunder, and to consummate the transactions contemplated hereby.
This Agreement has been duly executed and delivered by the Company. This
Agreement is the legal, valid and binding obligation of the Company, enforceable
against the Company in accordance with its terms. The Shares have been duly
authorized by the Company and, when issued and paid for in accordance with this
Agreement, will be validly issued, fully paid and non-assessable. The execution,
delivery and performance of this Agreement by the Company, and the consummation
by the Company of the transactions contemplated hereby does not require the
consent, waiver, approval, license or authorization of any person, entity or
public authority except for such approval as may be required by the Missouri
Public Service Commission and pursuant to the Hart-Scott Rodino Antitrust
Improvements Act of 1976; this Agreement does not, with or without the giving of
notice or the passage of time or both, violate any provision of law or the
corporate charter or bylaw of the Company, or conflict with or result in a
breach, termination or acceleration of any provision of, constitute a default
under, or result in the creation of any lien, claim, security interest or
encumbrance upon any of the assets and properties of the Company pursuant to any
mortgage, deed of trust, indenture or other agreement or instrument, or any
order, law, rule, regulation, judgment or decree or any other restriction of any
kind or character, to which the Company is a party or by which the Company or
any of its assets may be bound.

                  2.2 Capitalization and Related Matters. As of the date hereof,
the authorized capital stock of the Company consists solely of 1,550 shares of
stock, which consist of 1,000 shares of Series A Voting Common Stock, par value
$.01, 50 shares of Series B Non-Voting Common Stock and 500 shares of Preferred
Stock, par value $.01. At Closing, the authorized capital stock of the Company
shall consist solely of 1,000 shares of Common Stock, par value $.01, and 500
shares of Preferred Stock, par value $.01 per share. As of the date hereof, 300
shares of Series A Voting Common Stock are issued and outstanding and are held
of record by Weinstein. All of the issued and outstanding shares of Common Stock
were duly authorized and validly issued and are fully paid and non-assessable.
None of the Purchased Shares are subject to any preemptive rights of
shareholders of the Company, nor will any of them be issued in violation of any
right of first refusal or other similar right in favor of any person. Except as
set forth on Schedule 2.2, (a) there are no outstanding (i) other securities of
the Company, (ii) subscriptions, warrants, rights or options to acquire
securities of the Company, or (iii) any plans, understandings or agreements to
issue any such subscriptions, warrants, rights or options, or to otherwise
acquire any securities of the Company, and (b) the Company is not subject to any
obligation to issue, deliver, redeem, or otherwise acquire or retire the
Purchased Shares or any other securities of the Company.

                  2.3 Corporate Existence and Qualification. The Company is a
corporation duly incorporated, validly existing, and in good standing under the
laws of the State of Missouri; it is duly qualified and in good standing in each
foreign jurisdiction where such qualification is required, except where the
failure to so qualify and be in good standing will not have a material adverse
effect on the business, financial condition, operations or prospects of the
Company taken as a whole ("Material Adverse Effect"). The Company has the
corporate power and authority to own and use its properties and to transact the
business in which it is engaged.

                                       5
<PAGE>   6

                  2.4 Affiliates. Except as set forth on Schedule 2.4, the
Company has no Affiliates. For purposes of this Agreement, an "Affiliate" of a
person means any person or entity which is controlling, controlled by, or under
common control with, directly or indirectly through any person or entity, the
person referred to, and, if the person referred to is a natural person, any
member of such person's family.

                  2.5 Property and Permits. Except as set forth on Schedule 2.5,
the Company is the sole owner of all right, title and interest in and to all
assets reflected on the Balance Sheet and all property, real and personal,
tangible and intangible, used by it in, or necessary for it to transact, the
business in which it is engaged, free and clear of all mortgages, security
interests, claims, restrictions, and other encumbrances, and there exists no
restriction on the use or transfer of such assets or property, in each case
except where such would not have a Material Adverse Effect. Except as set forth
on Schedule 2.5, and except as would not have a Material Adverse Effect, no
assets or property of the Company are in the possession of others and the
Company holds no property on consignment. Except as set forth on Schedule 2.5
and except as would not have a Material Adverse Effect, all tangible such assets
and property are in good condition and repair, ordinary wear and tear excepted,
and fit for their intended purpose, and are not in Material violation of
applicable zoning or other Law. Except as set forth on Schedule 2.5, the Company
holds all permits, licenses and other approvals necessary to conduct the
business in which it is engaged. There are no assets of the Company not
reflected on the Company's Balance Sheet in accordance with Generally Accepted
Accounting Principles ("GAAP").

                  2.6 Condition and Sufficiency of Assets - Network and
Equipment. Except as set forth on Schedule 2.6, the network and equipment of the
Company are structurally sound, are in good operating conditions and repair, and
are adequate for the uses to which they are being put, and none of such network
and equipment are in need of maintenance or repairs except for ordinary, routine
maintenance and repairs that would not have a Material Adverse Effect.

                  2.7      Financial Statements.

                           (a) The Company has furnished or made available to
         Purchaser (i) the balance sheet of the Company as of June 30, 1996 and
         June 30, 1995, and the related statements of earnings, stockholders'
         equity and changes in financial position or cash flow for the fiscal
         years then ended and for the period from June 23, 1989 (inception) to
         June 30, 1996, and all notes and schedules thereto (the "Annual
         Financial Statements"), and (ii) the balance sheet of the Company as of
         October 31, 1996, and the related statements of earnings and changes in
         financial position for the period then ended, (the "Interim Financial
         Statements"; together with the Annual Financial Statements, the
         "Financial Statements"). The Annual Financial Statements have been
         audited by Deloitte & Touche, independent public accountants.

                           (b) The Financial Statements, (i) present fairly, in
         all material respects, the financial position, results of operations,
         and cash flows of the Company at the dates and for the periods
         indicated, and (ii) have been prepared in accordance with GAAP subject
         to year-end audit adjustments.

                           (c) To the knowledge of the Company, the Company does
         not have any liabilities or obligations (whether accrued, absolute,
         contingent, unliquidated or otherwise), except as would not have a
         Material Adverse Effect and except (i) as set forth in the Financial
         Statements (including notes thereto) unless any such liabilities are
         not required to be set forth therein in accordance with GAAP, (ii) as
         set forth on Schedule 2.7, or (iii) to the extent they arise in the
         ordinary course of the business of the Company and are not required to
         be set forth in a Schedule hereto, and (iv) Taxes (defined below)
 
 
                                       6

<PAGE>   7
       incurred since the date of the Balance Sheet.

                  2.8 Books and Records; Returns and Reports; Taxes. The books
and records of the Company fairly reflect, in accordance with GAAP, all
transactions relating to the Company and all items of income and expense, assets
and liabilities and accruals relating to the Company. The Company has not
engaged in any transaction, maintained any bank account or used any corporate
funds except for transactions, bank accounts and funds which have been and are
reflected in the normally maintained books and records of the Company.

                  2.9 Stock and Securities. Except for KCDT, the Company does
not own directly or indirectly the stock or the securities of any other
corporation nor does the Company own directly or indirectly any interest in a
general partnership, limited partnership, limited liability company, business
trust, joint venture, or any other entity.

                  2.10     Taxes.  Except as set forth on Schedule 2.10:

                           (a) The Company timely has filed or caused to be
         timely filed with the appropriate Government entity all federal, state,
         local and foreign income franchise, excise, payroll, sales and use,
         property and withholding tax returns and reports required to be filed
         pursuant to any applicable federal, state, local and foreign tax laws
         by or on behalf of the Company, including estimated tax and
         informational returns ("Tax Returns") and no Tax Returns have been
         amended. All Tax Returns are true, correct, and complete in all
         material respects.

                           (b) All Taxes (whether or not reflected in Tax
         Returns as filed) payable by the Company with respect to all periods
         reflected on Tax Returns have been fully paid, and there are no grounds
         for the assertion or assessment of any additional Taxes against the
         Company or its assets with respect to such periods. All accrued, but
         unpaid Taxes are properly reflected on the books of the Company.

                           (c) No Tax Returns of the Company are the subject of
         an audit and there are no audits of any Tax Returns in process or
         threatened. There is no waiver of any statute of limitations in effect
         with respect to any Tax Returns.

                           (d) There are no tax liens, whether imposed by any
         federal, state, local or foreign taxing authority, outstanding against
         any of the assets, properties or business of the Company.

                           (e) As used in this Agreement, "Taxes" means all
         taxes, charges, fees, levies, or other like assessments, including
         without limitation income, gross receipts, ad valorem, value added,
         premium, excise, real property, personal property, windfall profit,
         sales, use, transfer, license, withholding, employment, payroll, and
         franchise taxes imposed by the United States or any other nation,
         state, or bilateral or multilateral governmental authority, any local
         governmental unit or subdivision thereof, or any branch, agency, or
         judicial body thereof ("government"); and shall include any interest,
         fines, penalties, assessments, or additions to tax resulting from,
         attributable to, or incurred in connection with any such Taxes or any
         contest or dispute thereof.

                  2.11 Absence of Certain Changes or Events. Except for any
changes resulting or relating to the build-out of the KCDT network, since June
30, 1996, except as contemplated in this Agreement or set forth in the Financial
Statements or Schedule 2.11 hereto, there has not been:

                                       7
<PAGE>   8

                           (a) Any change in the business, financial condition,
         or operations of the Company taken as a whole that has resulted in a
         Material Adverse Effect;

                           (b) Any declaration, setting aside, or payment of any
         dividend or any distribution (in cash or in kind) to any shareholder of
         the Company with respect to any securities of the Company, or any
         direct or indirect redemption, purchase or other acquisition by the
         Company of any of its securities;

                           (c) Any increase (other than increases in accordance
         with past practice) in compensation or other remuneration payable by
         the Company to or for the benefit of or committed to be paid to or for
         the benefit of any shareholder, director, officer, agent, or employee
         of the Company who received salary in fiscal year 1995 in excess of
         $60,000, or in any benefits granted under any Plan with or for the
         benefit of any such shareholder, director, officer, agent, or employee;

                           (d) Any material transaction entered into or carried
         out by the Company other than in the ordinary course of business;

                           (e) Any borrowing or incurrence of any other
         indebtedness, contingent or other, of a material amount by or on behalf
         of the Company; or any endorsement, assumption, or guarantee of payment
         or performance of any loan or obligation of any other person or entity
         by the Company;

                           (f) Any material change made by the Company in its
         methods of doing business or of accounting;

                           (g) Any grant by the Company of any mortgage,
         security interest, or other encumbrance with respect to any of the
         assets and property, real and personal, tangible and intangible, of the
         Company (the "Property");

                           (h) Any sale, lease, or disposition of, or any
         agreement to sell, lease, or dispose of, any of its Property other than
         arm's-length sales, leases, or dispositions in the ordinary course of
         business of the Company or which would not have a Material Adverse
         Effect, to persons other than Affiliates of the Company or the Company;

                           (i) Any loan or advance made by the Company to any
         person or entity except for advances not material in amount made in the
         ordinary course of business to employees who are not Affiliates of the
         Company; or

                           (j) disposed of or permitted to lapse any
         Intellectual Property as defined in Section 2.14, except as would not
         have an Material Adverse Effect;

                           (k) issued, sold or transferred any stock, bond,
         debenture or other corporate security of the Company, whether newly
         issued or held in treasury;

                           (l) experienced damage, destruction or loss (whether
         or not covered by insurance) having a Material Adverse Effect;

                           (m) guaranteed the obligation of any person, firm or
         corporation or other entity, except by the endorsement of negotiable
         instruments for deposit or collection in the ordinary course of
         business; or

                           (n) Any binding commitment or agreement by the
         Company to do any 

                                       8
<PAGE>   9

         of the foregoing items (b) through (m).

                  2.12 Compliance With Laws. The Company is in compliance with,
and not in breach or in default of, all applicable federal, state and local
laws, ordinances, rules and regulations relating to its business and assets and
properties except where such noncompliance, breach or default would not have a
Material Adverse Effect, and the Company is in compliance with the provisions of
its Articles of Incorporation or Bylaws. Without limiting the generality of the
foregoing:

                           (a) Permits and Licenses. Schedule 2.12 sets forth a
         true, correct and complete list, and the Company has delivered to
         Purchaser true, correct and complete copies, of all permits, licenses,
         approvals, certifications and other authorizations (and the requests
         and applications therefore) which the Company is required to hold to
         own its assets and properties and/or conduct its business as currently
         conducted, except where noncompliance would not have a Material Adverse
         Effect. The Company has all permits, licenses, approvals,
         certifications, or other authorizations to issue its shares of stock,
         notes and other interests pursuant to the capitalization of the Company
         as contemplated by this Agreement, and/or to otherwise consummate the
         transactions contemplated by this Agreement, other than such approval
         as is required by the Missouri Public Service Commission or pursuant to
         the Hart-Scott-Rodino Antitrust Improvements Act of 1976 ("HSR Act").

                           (b) Compliance with Other Regulations and Court
         Orders. The Company is not in violation of any order of any court of
         law or equity or any regulatory or administrative body which has
         jurisdiction over the Company ("Court Order") or other rule or
         regulation, and the assets and properties of the Company have not been
         used or operated by the Company or any other person or entity in
         violation of any regulation or Court Order, except in any such case as
         would not have a Material Adverse Effect. The Company has made all
         filings or notifications required to be made by it under any rules or
         regulations applicable to the Company, its businesses and/or its assets
         and properties except where noncompliance would not have a Material
         Adverse Effect. Neither the Company nor any director, officer, employee
         or agent of, nor any consultant to, the Company has unlawfully offered,
         paid, or agreed to pay, directly or indirectly, any money or anything
         of value to, or for the benefit of, any individual who is or was a
         candidate for public office, or an official or employee of any
         governmental or regulatory body or authority or a director, officer or
         employee of any client, customer or supplier of the Company.

                  2.13 Intellectual Property Rights. The Company has no patents,
patent rights, patent applications, trademarks, trademark applications, trade
names, service marks, copyrights (the "Intellectual Property"). The Company owns
or possesses adequate licenses or other rights to use all Intellectual Property
necessary to conduct the Company's business as now operated. No claim is pending
or, to the knowledge of the Company, threatened, alleging that the present or
past operations of the Company infringe or conflict with the asserted
Intellectual Property rights of others, and neither the Company nor any employee
or officer of the Company or any other party has any rights whatsoever in any of
the Intellectual Property.

                  2.14 Litigation. Except as set forth on Schedule 2.14, (a)
there is no suit, claim, litigation, proceeding (administrative, judicial, or in
arbitration, mediation or alternative dispute resolution), Government or grand
jury investigation, or other action (any of the foregoing, "Action") pending or,
to the knowledge of the Company, threatened against the Company or involving its
business, any of its Property, or, in connection with its business, any of its
shareholders, directors, officers, agents, or other personnel, including without
limitation any 

                                       9
<PAGE>   10

Action challenging, enjoining, or preventing this Agreement or the consummation 
of the transactions contemplated hereby, and (b) the Company is not subject to 
any order, writ, injunction, or decree of any court or other Government entity 
("Order") other than Orders of general applicability.

                  2.15     Environmental Matters.

                           (a) Compliance With Environmental Regulations. the
         Company has operated its business in compliance with all applicable
         environmental statutes, regulations, orders, decisions and restrictions
         of the United States of America (including state, county and
         local-statutes, regulations, orders, decisions and restrictions) (the
         "Environmental Regulations") except where noncompliance would not have
         a Material Adverse Effect.

                           (b) Environmental Permits and Approvals. Schedule
         2.15 sets forth a true, correct and complete list, and the Company has
         delivered to Purchaser true, correct and complete copies, of all
         permits and approvals held by the Company with respect to the
         refinement, production, storage, handling, processing, disposal,
         treatment, transportation, discharge or release of any Hazardous
         Substances (as such term is defined below), as required for the
         operation of the business of the Company as presently conducted or
         which relate to the assets and properties (including without
         limitation, any leasehold interests) of the Company. Schedule 2.15 sets
         forth a true, correct and complete list of all of the waste dumps and
         disposal sites used by the Company and the names of the entities
         engaged in the handling, transportation and disposal of Hazardous
         Substances from any property owned or leased by the Company. For
         purposes of this Agreement the term "Hazardous Substances" shall mean
         materials defined as "hazardous substances", "hazardous wastes" or
         "solid wastes" under any of the Environmental Regulations.

                           (c) Environmental Proceedings. No reports have been
         filed by the Company, or to the Company's knowledge, by others, with
         respect to the Company or its assets or properties (including, without
         limitation, any leasehold interests) disclosing the presence of any
         Hazardous Substances upon or with respect to the Company or its
         properties (including without limitation, any leasehold interest).
         There has not been and is not now any suit, action, arbitration, legal,
         administrative or regulatory proceeding pending or, to the best
         knowledge of the Company, any pending investigation or threatened suit,
         action, arbitration, legal, administrative or regulatory proceeding,
         with respect to the Company, its assets or properties (including
         without limitation, any leasehold interests), relating to the
         refinement, production, storage, handling, processing, disposal,
         treatment, transportation, discharge or release of Hazardous
         Substances.

                  2.16     Contracts.

                           (a) Set forth on Schedule 2.16 is a list of each
         written or oral contract, agreement, lease, indenture, and evidence of
         indebtedness, to which the Company is a party or of which it is a
         beneficiary which involves outstanding, contingent, or continuing
         liability or obligation of or to the Company ("Contract") and which (i)
         is material to the business, financial condition or operations of the
         Company taken as a whole, (ii) involves (A) a guaranty, indemnity, or
         power of attorney, or (B) a sharing of payments or joint venture, or
         (iii) is not in the ordinary course of business of the Company.

                           (b) Each of the Contracts is a valid, binding and
         enforceable obligation of the Company and, to the knowledge of the
         Company, the other parties thereto. Except as indicated on Schedule
         2.16, (i) the Company is not, and (ii) to the knowledge of the 

                                       10
<PAGE>   11

         Company, no other party to a Contract is, in default under or
         in breach  or violation of any Contract, except where such default
         breach or violation would not have a Material Adverse Effect, and no
         event has occurred that, through the passage of time or the giving of
         notice, or both, would constitute, and neither the execution of this
         Agreement nor the Closing hereunder do or will constitute or result
         in, such a default, breach or violation, cause the acceleration of any
         obligation of any party thereto or the creation of a lien or
         encumbrance upon any Property or the Purchased Shares, or require any
         consent thereunder, except as would not have a Material Adverse
         Effect.

                  2.17 Insurance. The Company has at all times maintained: (a)
general comprehensive liability insurance against such risks as are customarily
insured against by companies similar to the Company and in at least such amounts
as are usually carried by persons engaged in the same or a similar business, and
(b) insurance as required by law or under any agreement to which the Company is
or has been a party, including without limitation, unemployment and workers'
compensation coverage. A list of each such insurance policy is set forth on
Schedule 2.17. The Company is not in default with respect to its obligations
under any insurance policy maintained by it. To the knowledge of the Company,
all insurance coverage applicable to the Company, its business, assets and
officers and directors is in full force and effect, is valid, binding and
enforceable in accordance with its terms against the respective insurers,
insures the Company in reasonably sufficient amounts against all risks usually
insured against by persons operating similar businesses or properties in the
localities where such businesses or properties are located and has been issued
by insurers of recognized responsibility. To the knowledge of the Company, there
is no default under any such coverage nor has there been any failure to give
notice or present any claim under any such coverage in a due and timely fashion.
There are no outstanding unpaid premiums except in the ordinary course of
business and no notice of cancellation or nonrenewal of any such coverage has
been received. Except as otherwise disclosed in the Disclosure Documents, there
are no provisions in such insurance policies for retroactive or retrospective
premium adjustments. To the knowledge of the Company, no event has occurred
which reasonably might form the basis of any claim against the Company, its
business, assets or officers and directors or which might materially increase
the insurance premiums payable for any such coverage. Except as set forth on
Schedule 2.17, there are no outstanding performance bonds covering or issued for
the benefit of the Company.

                  2.18 Officers, Directors, Employees, and Consultants. Set
forth on Schedule 2.18 is a list of: (a) all current directors of the Company,
(b) all current officers (with office held) of the Company, (c) all employees
(active or other) of the Company, (d) all current paid consultants to the
Company, and (e) all retirees and terminated employees of the Company for which
the Company has any benefits responsibility or other continuing or contingent
obligation, together, in each case, with the current rate of compensation (if
any) payable to each.

                  2.19 Transactions With Related Persons. Except as set forth on
Schedule 2.19 hereto, the Company has no obligations, contractual or otherwise,
owed to or owing from, directly or indirectly, the Company or any Affiliate of
the Company. Except as set forth on Schedule 2.19, no director, officer,
Affiliate, or shareholder of the Company has any material financial interest,
direct or indirect, in any supplier or customer of, or other business which has
any significant transactions or other business relationship with, the Company.

                  2.20     Labor Matters.

                           (a) Except as to anything which would not result in a
         Material Adverse Effect, the Company is in compliance with all
         applicable federal, state and local laws and regulations respecting
         employment and employment practices, and terms and conditions of
         employment and wages and hours, including, without limitation, the
         Immigration 

                                       11
<PAGE>   12

         Control and Reform Act of 1986, minimum wage and overtime
         payment laws, the Occupational Safety and Health Act of 1970, as
         amended, and any state or local occupational health and safety laws and
         unemployment and workers' compensation laws, the Worker Adjustment and
         Retraining Notification Act, any other labor relations laws or
         governmental regulations or policies promulgated thereunder, Title VII
         of the Civil Rights Act of 1964, as amended, the Equal Employment
         Opportunity Act of 1972, as amended, the Age Discrimination in
         Employment Act, as amended or the Reconciliation Act of 1972, as
         amended, and there is no unfair labor practice complaint against the
         Company pending before the National Labor Relations Board or any
         comparable state or local agency relating to the employees of the
         Company.

                           (b) Collective Bargaining. No collective bargaining,
         works council, union representation or other similar agreement
         presently covers the employees of the Company, nor has any in the past
         covered employees of the Company, nor is any currently being negotiated
         by the Company and there is no labor strike, dispute, slowdown,
         stoppage, solicitation of union authorization cards or union
         certification petition actually pending or, to the knowledge of the
         Company, threatened against or involving the Company.

                           (c)      Except as set forth on Schedule 2.20:

                                    (i)   The Company is not and has not 
                  engaged in any unfair labor practice which would result in a 
                  Material Adverse Effect;

                                    (ii)  There is no labor strike, dispute,
                  slowdown, or stoppage pending or, to the knowledge of the
                  Company, threatened against the Company;

                                    (iii) No right of representation exists
                  respecting the Company's employees;

                                    (iv)  No collective bargaining agreement is
                  currently being negotiated and no organizing effort is
                  currently being made with respect to the Company's employees;
                  and

                                    (v)   No current or former employee of the
                  Company has made or, to the knowledge of the Company
                  threatened to make a claim against the Company on account of
                  or for (A) overtime pay, other than overtime pay for the
                  current payroll period, (B) wages or salary (excluding current
                  bonus, accruals and amounts accruing under pension and
                  profit-sharing plans) for any period other than the current
                  payroll period, (C) vacation, time off or pay in lieu of
                  vacation or time off, other than that earned in respect of the
                  current fiscal year, or (D) any violation of any Law relating
                  to minimum wages or maximum hours of work.

                  2.21     Employee Benefit Matters.

                           (a) Except as set forth on Schedule 2.21, the Company
         does not have outstanding and is not a party to or subject to liability
         under: (i) any agreement, arrangement, plan, or policy that involves
         (A) any pension, retirement, profit sharing, deferred compensation,
         bonus, stock option, stock purchase, health, welfare, or incentive
         plan; or (B) welfare or "fringe" benefits, including without limitation
         vacation, severance, disability, medical, hospitalization, dental, life
         and other insurance, tuition, company car, club dues, sick leave,
         maternity, paternity or family leave, or other benefits; or (ii) any
         employment, consulting, engagement, or retainer agreement or
         arrangement (i) and (ii) 

                                       12
<PAGE>   13

         together the "Plans" and each item thereunder a "Plan"). True, correct
         and complete copies of all documents creating or evidencing any Plan
         listed on Schedule 2.21 have been delivered to Purchaser. There are no
         negotiations, demands or proposals which are pending or threatened or
         which have been made since June 30, 1996, which concern matters now
         covered, or that would be covered, by the foregoing types of agreement,
         arrangement, plan or policy.

                           (b) Each Plan has been administered in compliance
         with its terms, and, except as set forth on Schedule 2.21, in
         compliance with, and the Company has no direct or indirect liability
         under, the Employee Retirement Income Security Act of 1974, as amended
         ("ERISA") or other Law applicable to any Plan. Each Plan that is
         intended to qualify under Section 401(a) or Section 509(c)(9) of the
         Code has received a favorable determination letter from the Internal
         Revenue Service (a copy of which has been provided to Purchaser) and
         related trusts have been determined to be exempt from taxation. Nothing
         has occurred that would cause and no Action is pending or, to the
         knowledge of the Company, threatened which could result in the loss of
         such exemption or qualification.

                           (c) (i) The Company has not made any contributions to
         any multi-employer plan (as defined in ERISA) or to any pension plan
         subject to the minimum funding standards of ERISA or Title IV of ERISA,
         (ii) the Company has never been a member of a controlled group which
         contributed to any such plans; and (iii) the Company has never been
         under common control with an employer which contributed to any such
         plans.

                           (d) Nothing has occurred which would cause the loss
         of qualification or exemption or the imposition of any liability,
         penalty or tax under ERISA or the Code with respect to the operation of
         any of the Benefit Plans. All amendments required to bring the Benefit
         Plans into conformity with all of the applicable provisions of ERISA or
         the Code have been made.

                           (e) The Company has not terminated or taken action
         terminate any employee benefit plans.

                           (f) All of the Plans, to the extent applicable, are
         in compliance with the continuation of health benefit provisions
         contained in the Consolidated Omnibus Budget Reconciliation Act of
         1985, as amended, and with Section 1862(b)(4)(A)(i) of the Social
         Security Act, and the Company does not have any liability for any
         excise tax imposed by Code Section 5000.

                           (g) There is no violation of ERISA with respect to
         the filing of applicable reports and notices regarding the Benefit
         Plans with the Secretary of Labor and the Secretary of the Treasury or
         the furnishing of such documents to the participants or beneficiaries
         of the Benefit Plans.

                           (h) There are no pending claims or lawsuits which
         have been asserted or instituted against the assets of any of the
         Benefit Plans or against any fiduciary of the Benefit Plans with
         respect to the operation of the Benefit Plans.

                           (i) The Benefit Plans have been maintained in
         accordance with their terms and with all provisions of ERISA thereto
         and neither the Company, Weinstein nor any "party in interest" or
         "disqualified person" with respect to the Benefit Plans has engaged in
         a "prohibited transaction" within the meaning of Section 4975 of the
         Code or 

                                       13
<PAGE>   14

         Title I, Part 4 of ERISA.

                           (j) None of the Benefit Plans which are "employee
         welfare benefit plans" within the meaning of Section 3(1) of ERISA
         provides for continuing benefits or coverage after termination or
         retirement from employment except as provided in the Consolidated
         Omnibus Budget Reconciliation Act of 1985. Each such plan is in
         compliance with the provisions of ERISA, the applicable provisions of
         the Code and all other applicable law, except where such noncompliance
         would not have a Material Adverse Effect.

                  2.22 Discrimination and Occupational Safety and Health. To the
knowledge of the Company, no person has any claim, or basis for any Action
against the Company arising out of any Law relating to discrimination in
employment or employment practices or occupational safety and health standards.
The Company has not received any notice from any person alleging a violation of
such law or occupational safety or health standards.

                  2.23 Disclosure. To the Company's knowledge, there are no
misleading misstatements in any of the representations and warranties made by
the Company in this Agreement or in any of the agreements, exhibits,
certificates and instruments delivered or to be delivered by the Company
pursuant to this Agreement, except as would not have a Material Adverse Effect,
and the Company has not omitted to state any fact necessary to make such
representations and warranties not misleading, except as would not have a
Material Adverse Effect. The Company has delivered the Disclosure Documents, and
to the Company's knowledge, the Company has delivered all documents in its
possession as requested by Purchaser's counsel pursuant to its correspondence
dated December 19, 1996 (the "Due Diligence Request"), a copy of which is
attached hereto as Schedule 2.23, except as would otherwise not have a Material
Adverse Effect.

                  2.24 Brokers, Finders. Except as set forth on Schedule 2.24,
no finder, broker, agent, or other intermediary, acting on behalf of the
Company, is entitled to a commission, fee, or other compensation or obligation
in connection with the negotiation or consummation of this Agreement or any of
the transactions contemplated hereby.

                                   ARTICLE III
                   REPRESENTATIONS AND WARRANTIES OF PURCHASER

                  Purchaser hereby makes the following representations and
warranties to the Company, each of which is true and correct on the date hereof:

                  3.1 Authorization. Purchaser is a Missouri corporation, duly
organized, validly existing and in good standing under the laws of Missouri.
Purchaser has all requisite power and authority to execute and deliver this
Agreement, to perform its obligations hereunder, and to consummate the
transactions contemplated hereby. This Agreement constitutes a valid and binding
obligation of Purchaser, enforceable against Purchaser in accordance with its
terms.

                  3.2      Investment Representation.

                           (a) Purchaser recognizes that an investment in the
         Company is highly speculative and involves significant risks.

                                       14
<PAGE>   15


                           (b) Purchaser has been afforded the opportunity to
         ask questions and receive answers concerning the terms and conditions
         of its purchase of the Purchased Shares and to obtain any additional
         information which the Company possesses or can acquire without
         unreasonable effort or expense that is necessary to verify the accuracy
         of the information set forth in this Agreement. No oral or written
         statement or inducement which is contrary to the information set forth
         in this Agreement has been made by or on behalf of the Company to
         Purchaser.

                           (c) Purchaser is an "accredited investor" (as defined
         in Rule 501 of Regulation D promulgated under the Securities Act of
         1933, as amended (the "Securities Act")) and has such knowledge and
         experience in financial and business matters as to be capable of
         evaluating the merits and risks of an investment in the Purchased
         Shares.

                           (d) Purchaser (i) has adequate means of providing for
         its current needs and possible contingencies, (ii) has no need for
         liquidity in its investment, (iii) is able to bear the economic risks
         of such investment, and (iv) at the present time, can afford a complete
         loss of such investment.

                           (e) Purchaser is purchasing the Purchased Shares for
         its own account, for investment purposes, and not for distribution,
         assignment or resale to others. No other person has any direct or
         indirect beneficial interest in the Purchased Shares.

                           (f) Purchaser understands that (i) there is and will
         be no market for the Purchased Shares, (ii) the sale of such securities
         has not been and will not be registered under the Securities Act or any
         state securities laws in reliance on the exemption for nonpublic
         offerings provided by Section 4(2) of the Act and Regulation D
         promulgated thereunder and analogous state securities laws provisions,
         and must be held indefinitely unless they are subsequently registered
         under the Securities Act and applicable state securities laws or an
         exemption from such registration is available, (iii) the Company is
         under no obligation to register such securities on Purchaser's behalf
         or to assist it in complying with any exemption from registration, and
         (iv) such securities may not be sold pursuant to Rule 144 promulgated
         by the Securities and Exchange Commission pursuant to the Securities
         Act unless all of the conditions of that Rule are met.

                           (g) Purchaser understands that no Federal or state
         agency has passed upon the Purchased Shares or made any finding or
         determination as to the fairness of an investment therein or any
         recommendation or endorsement thereof. Purchaser will not transfer the
         Purchased Shares without registering or qualifying the same under
         applicable state securities laws unless such transfer is exempt under
         such laws.

                           (h) Purchaser has not relied upon any information or
         representations and warranties of the Company with respect to its
         investment in the Company except for the information, representations
         and warranties expressly set forth in this Agreement and the Disclosure
         Documents.


                                       15
<PAGE>   16

                      (i) Purchaser is not any employee benefit plan,
         pension plan, profit sharing plan, stock bonus plan, employee savings
         plan, HR-10 or Keogh plan, or any plan or arrangement similar to any of
         the foregoing (including a plan maintained for the benefit of
         self-employed individuals or an individual retirement account or
         annuity).

                  3.3 Projections. Purchaser understands that the financial
projections provided to them on December 18, 1996 represent only good faith
estimates by the Company. Purchaser understands that the Company cannot and does
not assure or guarantee the attainment of such projections, that the Company
makes no representations or warranties concerning such projections (and that no
representations or warranties herein should be read to imply otherwise), and
that there has been a delay in obtaining the equity investment assumed in such
projections. The foregoing should not be read to prevent the u se of Schedule
9.16 for purposes of Section 5(a) of the Certificate of Designations.

                  3.4 Governmental and Other Approvals. Except for filings under
the HSR Act, Purchaser is not required to give any notice to, make any filing
with or obtain any authorization, consent or approval of, any Government or
agency thereof or any other third party in order to consummate the transactions
contemplated by this Agreement.

                  3.5 No Sandbag. Purchaser has no knowledge of any breach by
the Company of its representations, warranties and covenants hereunder.
                           
                                   ARTICLE IV
                      CONDITIONS TO PURCHASER'S OBLIGATIONS

                  The obligations of Purchaser at Closing shall be subject to
the satisfaction at Closing of each of the following conditions:

                  4.1 Hart-Scott. The waiting period specified under the HSR Act
shall have expired or earlier terminated, and any other necessary regulatory
approvals shall have been obtained (including without limitation from the
Missouri Public Service Commission).

                  4.2 Consents. The Company shall have delivered to Purchaser
the consents referred to in Sections 1.4 (l), (m), and (n);


                  4.3 Execution of Shareholders' Agreement. The Company and
Weinstein shall have executed and delivered the Shareholders' Agreement.


                  4.4 Weinstein Guaranty. Weinstein shall have executed and
delivered the Weinstein Guaranty.

                  4.5 Lease. The Company and Weinstein shall have entered into a
lease in substantially the form of Exhibit D hereto.


                                       16
<PAGE>   17

                  4.6 Employment Agreement. The Company and Weinstein shall have
entered into the Employment Agreement.

                  4.7 Certificate of Designations. The Company shall have filed
the Certificate of Designations.

                  4.8 Delivery of Documents The documents to be delivered at the
Closing by the Company as set forth in Section 1.4 shall have been delivered.

                  4.9 Representations and Warranties True as of the Closing. The
representations and warranties of the Company contained in this Agreement or in
any schedule, certificate or document delivered by the Company to Purchase
pursuant to the provisions hereof shall have been true in all material respects
on the date hereof without regard to any schedule updates furnished by the
Company after the date hereof and shall be true in all material respects on the
Closing Date with the same effect as though such representations and warranties
were made as of such date.

                  4.10 Compliance with this Agreement. The Company shall have
performed and complied in all material respects with all agreements and
conditions required by this Agreement to be performed or complied with by it
prior to or at the Closing.

                  4.11 Closing Certificate. Purchaser shall have received a
certificate from the Company dated the Closing Date, certifying in such detail
as Purchaser may reasonably request that the conditions specified in Sections
4.9 and 4.10 hereof have been fulfilled and certifying that the Company has
obtained all consents and approvals required with respect to it.

                  4.12 Opinions of Counsel for Company. Bryan Cave LLP, counsel
for the Company, shall have delivered to Purchaser a written opinion, dated the
Closing Date, in the form of Exhibit 1.4(d) hereto with only such changes as
shall be in form and substance reasonably satisfactory to Purchaser and its
counsel.

                  4.13 No Threatened or Pending Litigation. On the Closing Date,
no suit, action or other proceeding, or injunction or final judgment relating
thereto, shall be threatened or by pending before any court or governmental or
regulatory official, body or authority in which it is sought to restrain or
prohibit or to obtain damages or other relief in connection with this Agreement
or the consummation of the transactions contemplated hereby, and no
investigation that might result in any such suit, action or proceeding shall be
pending or threatened.

                  4.14 Key Company Arrangements. Each of the employees of the
Company mutually agreed by the Company and Purchaser shall have executed and
delivered an employment/confidentiality/non-compete agreement in a form mutually
agreed to by Purchaser and the Company.

                  4.15 Approval of Counsel; Corporate Matters. All actions,
proceedings, resolutions, instruments and documents required to carry out this
Agreement or incidental hereto 



                                       17
<PAGE>   18

and all other related legal matters shall have been approved on the Closing date
by Shughart, Thomson & Kilroy. P.C., counsel for Purchaser, in the exercise of
their reasonable judgment. Company shall also have delivered to Purchaser such
other documents, instruments, certifications and further assurances as such
counsel may reasonable require.

                                    ARTICLE V
                     CONDITIONS TO THE COMPANY'S OBLIGATIONS

                  The obligations of the Company at Closing shall be subject to
the satisfaction at the Closing of the following conditions:

                  5.1 Hart-Scott. The waiting period specified under the
Hart-Scott-Rodino Antitrust Improvements Act of 1976 shall have expired or
earlier terminated.

                  5.2 Execution of Shareholders' Agreement. Purchaser shall have
executed a Shareholders' Agreement in substantially the form attached hereto.


                  5.3 Delivery of Purchase Price Purchaser shall have delivered
such portion and form of the Purchase Price as required by Section 1.5.
                           
                  5.3 Delivery of Documents The documents to be delivered at the
Closing by the Purchaser as set forth in Section 1.5, shall have been delivered.

                  5.4 Representations and Warranties True as of the Closing. The
representations and warranties of the Purchaser contained in this Agreement or
in any schedule, certificate or document delivered by Purchaser to the Company
pursuant to the provisions hereof shall have been true in all material respects
on the date hereof without regard to any schedule updates furnished by the
Purchaser after the date hereof and shall be true in all material respects on
the Closing Date with the same effect as though such representations and
warranties were made as of such date.

                  5.5 Compliance with this Agreement. Purchaser shall have
performed and complied in all material respects with all agreements and
conditions required by this Agreement to be performed or complied with by it
prior to or at the Closing.

                  5.6 Closing Certificate. The Company shall have received a
certificate from Purchaser dated the Closing Date, certifying in such detail as
the Company may reasonably request that the conditions specified in Sections 5.4
and 5.5 hereof have been fulfilled and certifying that Purchaser has obtained
all consents and approvals required with respect to it.

                  5.7 Opinions of Counsel for Purchaser. Counsel for Purchaser,
shall have delivered to the Company a written opinion, dated the Closing Date,
in the form of Exhibit 5.7 hereto with only such changes as shall be in form and
substance reasonably satisfactory to the Company and its counsel.


                                       18
<PAGE>   19

                  5.8 No Threatened or Pending Litigation. On the Closing Date,
no suit, action or other proceeding, or injunction or final judgment relating
thereto, shall be threatened or by pending before any court or governmental or
regulatory official, body or authority in which it is sought to restrain or
prohibit or to obtain damages or other relief in connection with this Agreement
or the consummation of the transactions contemplated hereby, and no
investigation that might result in any such suit, action or proceeding shall be
pending or threatened.

                  5.9 Key Company Arrangements. Each of the employees of the
Company mutually agreed by the Company and Purchaser shall have executed and
delivered an employment/confidentiality/non-compete agreement in a form mutually
agreed to by Purchaser and Company.

                  5.10 Approval of Counsel; Corporate Matters. All actions,
proceedings, resolutions, instruments and documents required to carry out this
Agreement or incidental hereto and all other related legal matters shall have
been approved on the Closing date by Bryan Cave L.L.C., counsel for the Company,
in the exercise of their reasonable judgment. Purchaser shall also have
delivered to the Company such other documents, instruments, certifications and
further assurances as such counsel may reasonable require.

                                   ARTICLE VI
                                    COVENANTS

                  6.1 Financial Statements and Other Information. So long as the
Purchaser shall be a shareholder, the Company shall furnish to the Purchaser and
each such subsequent holder:

                           (a) within 120 days after the end of each fiscal year
         of the Company, a consolidated balance sheet of the Company as of the
         end of such fiscal year and the related consolidated statements of
         operations, changes in stockholders' equity and cash flows of the
         Company for the fiscal year then ended, together with supporting notes
         thereto, audited and certified in accordance GAAP by a firm of
         independent public accounts of recognized national standing selected by
         the Company; and

                           (b) within 30 days after the end of each month, a
         consolidated balance sheet of the Company and its subsidiaries and the
         related consolidated statements of operations and cash flows of the
         Company, unaudited and subject to normal year-end adjustments, such
         balance sheet to be as of the end of such month and such statements of
         operations and cash flows to be for such month (with a comparison to
         budget for such month) and for the period from the beginning of the
         fiscal year to the end of such month (with a comparison to budget for
         such period), and shall be accompanied by a narrative explanation of
         the results;

                  6.2 Business Plan By the beginning of the first month of each
fiscal year, the Company shall submit a business plan for that year, including a
detailed projected income 


                                       19
<PAGE>   20

statement, balance sheet, and cash flow by month, along with a general business
and market forecast for the year. The business plan shall be formally approved
by the Board of Directors by unanimous vote.

                  6.3 Conduct Prior to Closing. All financing or financing
commitments (debt or equity) of the Company, between the date hereof and the
earlier of (i) the termination of this Agreement, or (ii) Closing, shall be
approved by Purchaser in its sole discretion. (It is understood that, pursuant
to the Shareholder's Agreement, Purchaser shall have also have the right to
approve all financing and financing commitments which would close after
Closing).

                  6.4 Cooperation. Each Party shall reasonably cooperate, as to
matters under such Party's control, in the satisfaction of conditions to the
obligations of the Parties at Closing; provided that the foregoing shall not
require either Party to waive any material condition herein to its obligations
at Closing or to incur any substantial cost not otherwise required hereunder.

                  6.5      Payment of Purchase Price.

                  (a) Purchaser shall pay up to $4 million of the Cash Portion
at Closing (in the discretion of the Company). The Company shall pay the balance
of the Cash Portion as needed to fund the Company's activities, provided that at
least twenty (20) days prior to the date of each draw THE COMPANY shall provide
Purchaser with a verified statement signed by Weinstein that 70% or more of the
Purchase Price, other than expenses of the Company incurred in connection with
the Company's financing efforts (not to exceed $1,000,000) ("Financing
Expenses"), has been used directly by the Company in property, plant and
equipment. the Company shall provide Purchaser with an itemization of the
Financing Expenses at Closing.

                  (b) Upon each payment specified in Section 6.5(a), the Company
shall issue a Preferred Stock certificate for a number of shares equal to the
payment divided by $150,000.

                  6.6 Key-Man Life Insurance. At Closing, the Company shall
provide evidence of a $10 million of key-man life insurance on the life on
Weinstein. Following Closing, the Company shall maintain such insurance as long
as such coverage is reasonably available.

                  6.7 Amendment of Articles Prior to Closing, the Company shall
amend its articles of incorporation to require that it shall take a vote of
shares holding at least 90% of the voting power of the Company's voting stock to
approve the actions set forth in the Shareholder Agreement as requiring the
approval of both the Company and Purchaser as shareholders.

                  6.8 Termination of Lending Contemporaneously with the
execution of this Agreement, the Company shall verify in writing that it has
canceled the financing commitment from the Company dated December 24, 1996.


                                       20
<PAGE>   21

                  6.9 Energy Services Following the Closing, Purchaser shall
have the right of first offer from the Company concerning ENERGY SERVICES rights
and contracts in the entire the Company service area. Prior to Closing, the
Company shall make no agreement or take any action inconsistent with this
covenant.

                  6.10 Status Reports Following the Closing, the Company shall
provide Purchaser weekly with the Company weekly status reports on the build-out
of the Company fiber optic network for the 30 months following Closing or lesser
time as approved by Purchaser.

                  6.11 Non-Voting Common Stock Prior to Closing, the Company
shall amend its articles to eliminate the Company's Class B non-voting common
stock.

                                   ARTICLE VII
                              RESTRICTED SECURITIES

                  7.1 Legend. Any shares of Preferred or Common Stock acquired
by Purchaser pursuant to this Agreement (and any securities issued with respect
thereto as a result of a stock dividend or stock split, or in connection with a
combination of shares, recapitalization, merger, consolidation or other
reorganization) shall be imprinted with a legend in substantially the following
form:

         "THE SHARES OF STOCK REPRESENTED BY THIS CERTIFICATE HAVE NOT BEEN
         REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED, OR ANY STATE
         SECURITIES ACTS, AND MAY NOT BE SOLD OR TRANSFERRED EXCEPT PURSUANT TO
         THE REGISTRATION PROVISIONS OF SUCH ACTS OR AN EXEMPTION THEREFROM. THE
         SHARES REPRESENTED BY THIS CERTIFICATE ARE SUBJECT TO CERTAIN
         RESTRICTIONS ON TRANSFER CONTAINED IN A CERTAIN STOCK PURCHASE
         AGREEMENT AND A CERTAIN SHAREHOLDERS AGREEMENT, BY AND AMONG THE
         COMPANY AND THE PURCHASER OF SUCH SHARES, COPIES OF WHICH ARE AVAILABLE
         AT THE PRINCIPAL OFFICES OF THE COMPANY.

                  7.2      Transfer of Common Stock.

                           (a) Any Common Stock acquired by Purchaser pursuant
         to this Agreement (and any securities issued with respect thereto as a
         result of a stock dividend or stock split, or in connection with a
         combination of shares, recapitalization, merger, consolidation or other
         reorganization) ("Restricted Securities") shall be transferred only in
         compliance with the Shareholder's Agreement.

                           (b) The transfer of the Restricted Securities shall
         be subject to and shall comply with, all applicable federal and/or
         state securities laws.


                                       21
<PAGE>   22

                                  ARTICLE VIII
                                 INDEMNIFICATION

                  8.1 Indemnification by the Company The Company will indemnify
         and hold harmless Purchaser, and its affiliates, partners,
         shareholders, directors, officers, employees, agents and assigns from
         and against any and all losses, liabilities, damages, actions, costs
         and expenses (including without limitation reasonable attorney fees and
         expenses) (collectively "Losses") resulting from the breach by the
         Company of its representations, warranties and covenants contained
         herein.

                  8.2 Indemnification by Purchaser. Purchaser will indemnify and
         hold harmless the Company and its affiliates, partners, shareholders,
         directors, officers, employees, agents and assigns from and against any
         and all Losses resulting from the breach by the Purchaser of its
         representations, warranties and covenants contained herein.

                  8.3 Indemnification by Weinstein Weinstein will indemnify
         Purchaser and the Company for any and all Losses resulting from
         judgments and awards rendered against the Company in the matter of
         Alfred H. Frank v. Richard D. Weinstein and Digital Teleport, Inc.,
         filed in the Circuit Court of St. Louis County.

                  8.4 Dispute Resolution. In the event Purchaser makes a claim
         against Company pursuant to Section 8.1 above, then Purchaser shall
         make written demand first against the Company for the Losses. If the
         Losses are not paid by Company within thirty (30) days of said written
         notice to Company, then a dispute ("Dispute") shall be deemed to exist
         between the Purchaser and Company in regard to said Losses. All
         Disputes and other matters in question between the parties hereto
         arising out of or relating to the Losses will be decided by arbitration
         in Kansas City, Missouri, in accordance with the Commercial Arbitration
         Rules of the American Arbitration Association then existing, subject to
         the limitations and restrictions stated in subparagraphs (a), (b), (c)
         and (d) below. This agreement so to arbitrate and any other agreement
         or consent to arbitrate entered into in accordance herewith as provided
         in this subsection will be specifically enforceable under the
         prevailing law of any court having jurisdiction.

                           (a) Notice of demand for arbitration must be filed in
         writing with the other parties to this Agreement and with the American
         Arbitration Association. The demand must be made within a reasonable
         time after the Dispute or other matter in question has arisen. In no
         event may the demand for arbitration be made after the date when
         institution of legal or equitable proceedings based on such Dispute or
         other matter in question would be barred by the applicable statute of
         limitations or the survival provisions of Section 9.4 of this
         Agreement.

                           (b) Weinstein shall receive notice of any arbitration
         proceeding pursuant to this Section 8.4 and Weinstein shall have the
         right to participate in any such 

                                       22
<PAGE>   23

         arbitration proceeding and/or assume the defense of the Company at 
         Weinstein's sole cost and expense.

                           DTI and Weinstein shall have the right to assert any
         counter-claim, set-off, waiver or any other defenses in law or equity,
         in any such arbitration proceeding.

                           (c) The award rendered by the arbitrator will be
         final, judgment may be entered upon it in any court having jurisdiction
         thereof, and will not be subject to modification or appeal except to
         the extent permitted by Sections 10 and 11 of the Federal Arbitration
         Act (9 U.S.C. Section 10, 11), as amended.

                           (d) The Dispute shall be heard by a single arbitrator
         who shall decide the Dispute within sixty (60) days of the filing of
         the Dispute with the American Arbitration Association. Upon a
         determination by the arbitrator of the Dispute in favor of Purchaser,
         and after a period of one hundred and fifty (150) days, if Company does
         not pay any award to Purchaser, then Weinstein shall surrender his
         stock in the Company to Purchaser in accordance with the terms and
         conditions of the Guaranty Agreement and Pledge Agreement.

                  8.5 Limitation. The liability of the Company under this
         Agreement shall be limited to the Purchase Price paid by Purchaser
         hereunder, plus interest and expenses of litigation (including
         reasonable attorney's fees).



                                   ARTICLE IX
                            MISCELLANEOUS PROVISIONS

                  9.1      Confidentiality.

                           (a) For purposes of this Agreement, "Confidential
         Information shall mean all information, in whatever form transmitted,
         relating to the past, present or future business affairs of the
         Company, including without limitation, research, development, or
         business plans, operations or systems of the Company or another party
         whose information the Company has in its possession under obligations
         of confidentiality, which (a) is disclosed by the Company or its
         Affiliates to Purchaser or its Affiliates, bearing an appropriate
         legend indicating its confidential or proprietary nature or otherwise
         disclosed in a manner consistent with its confidential or proprietary
         nature, or (b) is produced or developed during the working relationship
         between the parties hereto and which would, if disclosed to competitors
         of the Company, give such competitors an advantage (or increase such
         advantage) over the Company or diminish the Company's advantage over
         such competitors. "Confidential Information" includes all information
         that would be confidential information pursuant to the existing
         confidentiality agreement between the Company and Purchaser.
         "Confidential Information" shall not include any information 

                                       23
<PAGE>   24

         of the Company that: (i) is or becomes publicly known through no
         wrongful act of Purchaser; (iii) is independently developed by
         Purchaser without the use of other Confidential Information, (iv) is
         communicated to a third party with the express written consent of the
         Company, or (v) is lawfully required to be disclosed to any
         governmental agency or is otherwise required to be disclosed by law,
         provided that before making such disclosure Purchaser shall give the
         Company an adequate opportunity to interpose an objection or take
         action to assure confidential handling of such information.

                           (b) Each party agrees to provide to the other party
         such information (including Confidential Information) as shall be
         necessary to permit the performance of their respective obligations
         hereunder. The Company and Purchaser shall not disclose any
         Confidential Information it receives from the Company to any person
         except (i) employees of Purchaser and its Affiliates who have a need to
         know and who have been informed of Purchasers obligations under this
         Agreement and (ii) employees of the Company and its Affiliates who have
         a need to know and who have been informed of the confidential nature of
         the information. Purchaser shall use not less than the same degree of
         care, and in any event not less than reasonable care, to avoid
         disclosure to such Confidential Information as Purchaser uses for its
         own confidential information of like importance.

                           (c) All Confidential Information that is disclosed in
         tangible form by the Company to Purchaser under this Agreement
         (including without limitation documents, writings, designs, drawings,
         specifications and information incorporated in computer software or
         held in electronic storage media) shall be and remain the property of
         the Company. All such Confidential Information shall be returned to the
         Company or destroyed promptly upon written request and shall not
         thereafter be retained in any form by Purchaser. The rights and
         obligations of the parties under this Agreement shall survive any such
         return or destruction of Confidential Information.

                           (d) The parties agree that, in the event of a breach
         or threatened breach of the terms of this Article, the Company shall be
         entitled to an injunction prohibiting any such breach. Any such relief
         shall be in addition to and not in lieu of any appropriate relief in
         the way of money damages. The parties acknowledge that Confidential
         Information is valuable and unique and that disclosure in breach hereof
         will result in irreparable injury to the Company.

                  9.2 Further Assurances. From and after the Closing, the
Parties shall do such acts and execute such documents and instruments as may be
reasonably required to make effective the transactions contemplated hereby.

                  9.3 Notice. All notices, requests, demands, and other
communications required or permitted under this Agreement shall be in writing
and shall be deemed to have been duly given and made upon being delivered either
in person or by nationally recognized courier or by fax delivery to the Party
for whom it is intended, provided that a copy thereof is deposited, postage
prepaid, certified or registered mail, return receipt requested, in the United
States mail, 

                                       24
<PAGE>   25

bearing the address shown in this Section 9.3 for, or such other address as may 
be designated in writing hereafter by, such Party:

                  If to the Company:

                  Digital Teleport, Inc.
                  11111 Dorsett Road
                  St. Louis, MO  63043
                  Fax: 314-253-6699
                  Attn:  Richard D. Weinstein

                  With a copy to:

                  Richard D. Weinstein
                  11111 Dorsett Road
                  St. Louis, MO  63043
                  Fax: 314-253-6699
                  Attn:  Richard D. Weinstein



                  With a copy to:

                  Bryan Cave LLP
                  One Metropolitan Square
                  Suite 3600
                  211 N. Broadway
                  St. Louis, MO  63102
                  Fax: 314-259-2020
                  Attn:  J. Mark Klamer



                                       25
<PAGE>   26

                  If to Purchaser:

                  KLT Telecom Inc.
                  1201 Walnut
                  Kansas City, Missouri 64106
                  Fax: 816-556-2802
                  Attn: Ronald G. Wasson

                  With a copy to:

                  KLT  Inc.
                  1201 Walnut
                  Kansas City, Missouri 64106
                  Fax: 816-556-2802
                  Attn:  General Counsel

                  With a copy to:

                  Shughart Thomson & Kilroy
                  Twelve Wyandotte Plaza
                  120 West 12th Street
                  Kansas City, Missouri 64105
                  Fax: 816-374-0509
                  Attn: Robert E. Fitzgerald

                  9.4 Survival. All representations and warranties contained
herein shall survive the execution and delivery of this Agreement and the
consummation of the transactions contemplated hereby for a period of three
years. All covenants contained herein shall survive the execution and delivery
of this Agreement and the consummation of the transactions contemplated hereby
for as long as Purchaser is a shareholder of the Corporation.

                  9.5 Entire Agreement. This Agreement, the Shareholders
Agreement and the Guaranty embody the entire agreement and understanding of the
parties hereto with respect to the subject matter hereof, and supersede all
prior and contemporaneous agreements and understandings relative to such subject
matter.

                  9.7 Assignment; Binding Agreement. This Agreement and various
rights and obligations arising hereunder shall inure to the benefit of and be
binding upon Purchaser, its successors, and permitted assigns and the Company,
its successors and permitted assigns. Neither this Agreement nor any of the
rights, interests, or obligations hereunder shall be transferred, delegated, or
assigned (by operation of law or otherwise) by either of the Parties hereto
without the prior written consent of the other Party (which consent shall not be
unreasonably withheld), except that Purchaser shall have the right to transfer
and assign its rights hereunder to purchase the Purchased Shares and any other
rights or benefits afforded to it by this 

                                       26
<PAGE>   27

Agreement to any entity which at the time of such transfer and assignment is 
controlled by Purchaser.

                  9.8 Severability. Whenever possible, each provision of this
Agreement shall be interpreted in such manner as to be effective and valid under
applicable law, but if any provision of this Agreement is held to be prohibited
by or invalid under applicable law, such provision shall be ineffective only to
the extent of such prohibition or invalidity, without invalidating the remainder
of this Agreement.

                  9.9 Incorporators, Shareholders, Officers, Directors and
Employees Free From Personal Liability. No recourse under or upon any
obligation, covenant or agreement of this Agreement , other than Section 8.3 and
Section 8.4, will be had against any incorporator, shareholder, officer,
director, or employee, as such, past, present or future, of the Company or
Purchaser, or of any predecessor or successor entities, whether by virtue of any
constitution, statute, or rule of law, or by the enforcement of any assessment
or penalty or otherwise, it being expressly understood that this Agreement,
except for Section 8.3 and Section 8.4, is solely a corporate obligation, and
that no such personal liability whatsoever will attach to, or is or will be
incurred by, the incorporators, shareholders, officers, directors or employees,
as such, of the Company or Purchaser, or of any predecessor or successor
entities, under or by reason of the obligations, covenants, or agreements
contained in this Agreement and the documents referred to herein, except for
Section 8.3, Section 8.4. For purposes of the foregoing sentence, the term
"Agreement" shall not refer to any agreement set forth as an exhibit hereto
incorporated herein by reference and to which any incorporator, shareholder,
officer, director, or employee is a party in his or her personal capacity.

                  9.10 Knowledge. For purposes of this Agreement, "to the
Company's knowledge", "to the knowledge of the Company" or "to the best
knowledge of the Company" (or words of similar meaning) shall mean to the
knowledge of Richard D. Weinstein, as Chairman, President, Chief Executive
Office and sole shareholder of the Company. For purposes of this Agreement, "to
Purchaser's knowledge", "to the knowledge of Purchaser" or "to the best
knowledge of the Purchaser" (or words of similar meaning) shall mean to the
knowledge of Ronald G. Wasson as President of Purchaser and James Gilligan as
director and employee of Purchaser.

                  9.11 Schedules. The following documents ("Disclosure
Documents") are deemed to be incorporated into each of the schedules of this
Agreement: (i) the documents referenced in the data room index, a copy of which
is attached as Schedule 9.11(a); (ii) the documents referenced in Schedule
9.11(b); (iii) the documents set forth in Schedule 2.24; and (iv) the proposed
amendment with one of the Company's major customers.

                  9.12 Counterparts. This Agreement may be executed
simultaneously in multiple counterparts, each of which shall be deemed an
original, but all of which taken together shall constitute one and the same
instrument.

                                       27
<PAGE>   28

                  9.13 Headings; Interpretation. The article and section
headings contained in this Agreement are inserted for convenience only and shall
not affect in any way the meaning or interpretation of the Agreement. Each
reference in this Agreement to an Article, Section, Schedule or Exhibit, unless
otherwise indicated, shall mean an Article or a Section of this Agreement or a
Schedule or Exhibit attached to this Agreement, respectively. References herein
to "days", unless otherwise indicated, are to consecutive calendar days. Both
Parties have participated substantially in the negotiation and drafting of this
Agreement and agree that no ambiguity herein should be construed against the
draftsman.

                  9.14 Termination of the Agreement. This Agreement may be
terminated without further liability or obligation, except for those liabilities
and obligations which expressly survive such termination,

                           (a) by either Party if a material breach of any
         provision of this Agreement has been committed by the other Party and
         such breach has not been waived;

                           (b) by mutual consent of the Parties; or

                           (c) by either Party if the Closing has not occurred
         (other than through the failure of any Party seeking to terminate this
         Agreement to comply fully with its obligations under this Agreement) on
         or before March 14, 1997, or such later date as the Parties may agree
         upon.

                  9.15     Incorporation of Exhibits,

                  All of the exhibits hereto are hereby incorporated by
reference.

                  9.16      Quarterly EBITDA Targets

                  The quarterly EBITDA Targets referenced in the Certificate of
Designations is set forth in Schedule 9.16 hereto.

                  9.17     Governing Law.

                  This Agreement shall in all respects be construed in
accordance with and governed by the substantive laws of the State of Missouri,
without reference to its choice of law rules.

                                       28

<PAGE>   29


                           THIS AGREEMENT CONTAINS A BINDING ARBITRATION
         PROVISION WHICH MAY BE ENFORCED BY THE PARTIES

                           IN WITNESS WHEREOF, each of the Parties hereto has
         caused this Agreement to be executed as of the date first above
         written.


                                KLT TELECOM INC:



                                By: /s/  R. G. Wasson
                                    --------------------------------  
                                     Ronald G. Wasson
                                     President


                                DIGITAL TELEPORT, INC.



                                By:  /s/  Richard D. Weinstein
                                    -------------------------------- 
                                     Richard D. Weinstein,
                                     President


                                    * * *

Schedules to this Exhibit have been omitted in accordance with Regulation S-K 
of the Commission.  The omitted materials set forth the factual representations 
and other factual exceptions to representations and ancillary agreements 
relating to the transaction as set forth in Articles I and II herein.  The 
Registrant hereby agrees to furnish any such omitted schedule to the Commission 
upon request.









                                      29

<PAGE>   1

                                                                   EXHIBIT 10.32



                             DIGITAL TELEPORT, INC.
                   AMENDMENT NO. 1 TO STOCK PURCHASE AGREEMENT


          THIS AMENDMENT NO. 1 TO STOCK PURCHASE AGREEMENT (the "Amendment")
dated as of February 12, 1998, by and among DIGITAL TELEPORT, INC. (the
"Company"), a Missouri corporation, DTI HOLDINGS, INC., a Missouri corporation
which wholly owns the Company, RICHARD D. WEINSTEIN ("Weinstein"), an
individual, and KLT TELECOM INC. ("KLT"), a Missouri corporation.

          WITNESSETH:

          WHEREAS, the Company and KLT (and, for limited purposes, Weinstein)
entered into that certain Stock Purchase Agreement, dated as of December 31,
1996 (the "Stock Purchase Agreement");

          WHEREAS, the parties thereto desire to amend the Stock Purchase
Agreement as provided herein;

          NOW, THEREFORE, Weinstein, KLT and the Company agree as follows:

     1.   Section 8.3. Section 8.3 of the Stock Purchase Agreement is, effective
as of the date hereof, amended to read in its entirety as follows:

          "8.3 Indemnification by Weinstein. Weinstein will indemnify Purchaser,
the Company and DTI Holdings, Inc. ("Holdings") for any and all Losses resulting
from judgments and awards rendered against the Company and Holdings in the
matter of Alfred H. Frank v. Richard D. Weinstein and Digital Teleport, Inc.,
filed in the Circuit Court of St. Louis County (the "Frank Litigation"). Any
settlement of the Frank Litigation proposed to be paid by the Company or
Holdings must be expressly approved by the Board of Directors of Holdings."

     2.   Section 8.4(d). Section 8.4(d) of the Stock Purchase Agreement is,
effective as of the date hereof, amended to read in its entirety as follows:

          "(d) The Dispute shall be heard by a single arbitrator who shall
decide the Dispute within sixty (60) days of the filing of the Dispute with the
American Arbitration Association. Upon a determination by the arbitrator of the
Dispute in favor of Purchaser, and after a period of one hundred and fifty (150)
days from the later of (i) the date of such determination, or (ii) the
termination of that certain Subordination Agreement by and among Purchaser,
Weinstein, Holdings and the Company dated February 12, 1998, Weinstein shall
surrender his stock in the Company to Purchaser in accordance with the terms and
conditions of the Guaranty Agreement and Pledge Agreement".

     3.   Definitions. Any capitalized terms used but not defined herein shall
have the meaning ascribed thereto in the Shareholders' Agreement.
<PAGE>   2

     4.   Effect of this Amendment. Except as otherwise specifically amended
herein, the Shareholders' Agreement, as modified by this Amendment, remains in
full force and effect.

     4.   Counterparts; Effectiveness. This Amendment may be signed in any
number of counterparts, each of which shall be an original, with the same effect
as if the signatures thereto and hereto were upon the same instrument.

                                    * * * * *

















                                       2
<PAGE>   3



          IN WITNESS WHEREOF, the parties have caused this Amendment to be
executed and delivered as of the day and year first above written.


                                      DIGITAL TELEPORT, INC.



                                      By: /s/ Richard D. Weinstein
                                          -------------------------------------
                                           Richard D. Weinstein
                                           President and Chief Executive Officer


                                      DTI HOLDINGS, INC.


                                      By: /s/ Richard D. Weinstein
                                          -------------------------------------
                                           Richard D. Weinstein
                                           President and Chief Executive Officer



                                      /s/ Richard D. Weinstein
                                      -----------------------------------------
                                      Richard D. Weinstein



                                      KLT TELECOM INC.


                                      By: /s/ RG Wasson
                                          -------------------------------------
                                          Ronald G. Wasson
                                          President





                                       3

<PAGE>   1

                                                                   EXHIBIT 10.33


 
                              CONSULTING AGREEMENT

               THIS CONSULTING AGREEMENT ("Consulting Agreement") is made and
entered into as of the 4th day of May, 1998, by and Digital Teleport, Inc., a
Missouri corporation (the "Company"), and H.P. Scott ("Consultant").

                                   WITNESSETH:

               WHEREAS, the Company and Consultant had previously entered into
that certain Consulting Agreement dated April 20, 1998, which this Consulting
Agreement supersedes in its entirety;

               WHEREAS, the Company wishes to retain Consultant and Consultant
wishes to be retained by Company on the terms set forth herein;

               NOW, THEREFORE, in consideration of the mutual promises
hereinafter set forth, it is hereby agreed as follows:

                  1.  Engagement. Consultant is hereby engaged as a consultant
to the Company. The term of Consultant's services to the Company shall  commence
on the date first set forth above and shall end on the first anniversary of such
date (the "Consulting Term").

                  2.  Consulting Services. Consultant shall perform such
consulting services as Company requests in the area of carrier's carrier sales
and swaps by the Company and any other services as Company and Consultant
mutually agree ("Consulting Services"). During the Consulting Term, Consultant
shall devote such time, attention, skill, energy and efforts as may be necessary
for the faithful performance of the Consulting Services. The Company and
Consultant currently expect that Consultant shall spend approximately 15
calendar days each month performing the Consulting Services, provided that this
expectation imposes no independent legal obligation on Consultant or Company.
Consultant shall have the title "Senior Vice President".

                  3.       Compensation.

                  (a) The Company shall pay Consultant $800 a day spent
performing Consulting Services within a week of submission of invoices.

                  (b) The Company shall pay to Consultant a commission equal to:

                           (i) One percent of any cash payments received for
sales of unlit fiber optic cable strands ("Dark Fiber") to telecommunications
companies, which sales are substantially negotiated or closed during the
Consulting Term, and for which Consultant provided substantive Consulting
Services with respect thereto. A sale shall be deemed to have been substantially


                                       1
<PAGE>   2

negotiated if all material business terms have been agreed to definitively or in
principle during the Consulting Term, or such sale closes within one month
following the Consulting Term. Substantive Consulting Services shall be deemed
to have been rendered if Consultant negotiates directly in person or by phone
with representatives of the buyer of such dark fiber. Such commission shall be
paid when cash is actually received by the Company and shall be payable even if
received following the term hereof, provided that no amount shall be payable
with respect to any cash received with respect to such sales following five
years following the end of the Consulting Term.

                           (ii) $200 for each route mile of Dark Fiber
(regardless of the number of strands of fiber optic cable, but with a contract
term of at least 20 years) received by the Company in a swap for Dark Fiber
owned by the Company, which swap is substantially negotiated or closed during
the Consulting Term, and for which Consultant provided substantive Consulting
Services with respect thereto. A swap shall be deemed to have been substantially
negotiated if all material business terms have been agreed to definitively or in
principle during the Consulting Term, or such swap closes within one month
following the Consulting Term. A swap shall be deemed to be closed when a
definitive indefeasible right to use ("IRU") such Dark Fiber in favor of the
Company is executed. Substantive Consulting Services shall be deemed to have
been rendered if Consultant negotiates directly in person or by phone with
representatives of the other party to such swap. Such commission shall be paid
within one month following the later of (i) the time the Company becomes
eligible to use the Dark Fibers being received or (ii) the time at which there
are no significant conditions to the Company's continued use of such Dark
Fibers, including without limitation the completion of construction by the
Company of the Dark Fibers being swapped. If a swap involves the payment by the
Company of cash, then the Consultant shall nonetheless be eligible for the
commission provided in this Section 3(b)(ii) for the route miles of Dark Fibers
received by the Company, up to the number of routes miles of Dark Fiber given by
the Company in such transaction. If a swap involves the receipt by the Company
of both cash and Dark Fibers, then the Consultant would be entitled to the
commissions payable under both Section 3(b)(i) and Section 3(b)(ii).

                           (iii) One percent of any cash payments received from
sales of lighted bandwidth capacity at a rate of a DS-3 or above ("Bandwidth")
to telecommunications companies, which sales are substantially negotiated or
closed during the Consulting Term, and for which Consultant provided substantive
Consulting Services with respect thereto. A sale shall be deemed to have been
substantially negotiated if all material business terms have been agreed to
definitively or in principle during the Consulting Term, or such sale closes
within one month following the Consulting Term. Substantive Consulting Services
shall be deemed to have been rendered if Consultant negotiates directly in
person or by phone with representatives of the buyer of such bandwidth. Such
commission shall be paid when cash is actually received by the Company, and
shall be payable even if received following the term hereof, provided that no
amount shall be payable with respect to any cash received with respect to such
sales following five years following the end of the Consulting Term.


                                       2
<PAGE>   3

                           (iv) One percent of the value of any bandwidth
received in exchange for Bandwidth with telecommunications companies, which
exchange is substantially negotiated or closed during the Consulting Term, and
for which Consultant provided substantive Consulting Services with respect
thereto. An exchange shall be deemed to have been substantially negotiated if
all material business terms have been agreed to definitively or in principle
during the Consulting Term, or such exchange closes within one month following
the Consulting Term. Substantive Consulting Services shall be deemed to have
been rendered if Consultant negotiates directly in person or by phone with
representatives of the other party to such exchange. Such commission shall be
paid quarterly as bandwidth is available for use by the Company, and shall be
payable even following the term hereof, provided that no amount shall be payable
with respect to any bandwidth available for use by the Company following five
years following the end of the Consulting Term. If an exchange involves the
payment by the Company of cash, then the Consultant shall nonetheless be
eligible for the commission provided in this Section 3(b)(iv) for the bandwidth
received by the Company, reduced by the amount of cash paid on a pro rata basis.
If an exchange involves the receipt by the Company of both cash and bandwidth,
then the Consultant would be potentially eligible for the commissions payable
under both Section 3(b)(iii) and Section 3(b)(iv).

                  (c) One percent of any rebates or credits to a customer
arising from a sale for which commissions are payable under Section 3(b) shall
be deducted from the commissions from such sale, or the commissions for any
other sale, payable under Section 3(b).

                  (d) Consultant shall be paid $100,000 upon the execution of
this Consulting Agreement.

                  (e) Consultant shall be reimbursed by the Company for his
reasonable expenses for travel from his home in Dallas, Texas on Company
business, including without limitation travel to the Company's headquarters in
St. Louis, Missouri and his reasonable living expenses while in St. Louis on
Company business, in accordance with the Company's general reimbursement
policies.

                  (f) The sale of Dark Fiber or Bandwidth, and the terms
thereof, must be approved by the chief executive officer of the Company, in his
sole and absolute discretion. This Consulting Agreement, and the retention by
Company of the Consultant, imposes no obligation on the Company or Chief
Executive Officer to approve any terms or any sale.

                  (g) Consultant at his sole discretion may elect to take up to
50% of any commissions payable under Section 3(b) in the form of common stock of
the Company, such stock to be valued at the fair market value thereof. Prior to
the listing of such common stock on a stock exchange or Nasdaq National Market,
the fair market value of the stock shall be determined by the Board of Directors
of the Company or the Compensation Committee, whose determination shall be final
and binding on the parties hereto. Following such listing of the 


                                       3
<PAGE>   4

common stock, the fair market value shall be the closing price on the date the
Company receives the cash payment giving rise to the obligation to pay
Consultant a commission hereunder (regardless of when Consultant makes an
election to receive such commission in the form of common stock). Consultant
may make the election provided herein with respect to any amount to be paid to
him as a commission upon written notice received by the Company prior to the
Company paying to a Consultant any such commission. Such election shall apply
only to the commissions specifically identified in such notice, and shall not
apply to any other commissions.

                  4.  Third-Party Confidentiality. Consultant shall not disclose
to the Company or induce the Company to use any secret or confidential
information belonging to persons not affiliated with the Company. Consultant
acknowledges that the Company has disclosed that the Company is now, and may be
in the future, subject to duties to third parties to maintain information in
confidence and secrecy. By executing this Consulting Agreement, Consultant
consents to be bound by any such duty owed by the Company to any third party.

                  5.  Inventions, Etc.; Confidentiality

                  (a) Any and all ideas, inventions, discoveries, patents,
patent applications, continuation-in-part patent applications, divisional patent
applications, technology, copyrights, derivative works, trademarks, service
marks, improvements, trade secrets and the like, which are developed, conceived,
created, discovered, learned, produced and/or otherwise generated by Consultant,
whether individually or otherwise, during the time that Consultant is retained
by the Company, whether or not during working hours, that relate to (i) the
business and/or activities of the Company, (ii) the Company's anticipated
research or development, or (iii) any work performed by Consultant for the
Company, shall be the sole and exclusive property of the Company, and the
Company shall own any and all right, title and interest to such property. The
Consultant assigns and agrees to assign to the Company any and all right, title
and interest in and to any such ideas, inventions, discoveries, patents, patent
applications, continuation-in-part patent applications, divisional patent
applications, technology, copyrights, derivative works, trademarks, service
marks, improvements, trade secrets and the like, whenever requested to do so by
the Company, at the Company's expense, and the Consultant agrees to execute any
and all applications, assignments or other instruments which the Company deems
desirable or necessary to protect such interests.

                  (b) Section 5(a) shall not apply to any invention for which no
equipment, supplies, facilities, or confidential and trade secret information of
the Company was used and which was developed entirely on the Consultant's own
time, unless (i) the invention relates (A) to the Company's business or (B) to
the Company's actual or demonstrably anticipated research or development or (ii)
the invention results from any work performed by the Consultant for the Company.


                                       4
<PAGE>   5

                  (c) Consultant acknowledges that Consultant's work for the
Company is expected to bring him or her into close contact with various
confidential business data of the Company and its clients not readily available
to the public. Accordingly, Consultant:

                           (i) covenants and agrees that (A) during the
         Consulting Term, except pursuant to appropriate safeguards on
         confidentiality and only in connection with the business of the
         Company, and (B) after the Consulting Term, on any basis for any
         reason, Consultant shall not use or disclose to anyone except
         authorized personnel of the Company, whether or not for his benefit or
         otherwise, any confidential matters (collectively, "Confidential
         Matters"), concerning the Company or its suppliers, consultants, agents
         or clients, whether former, current or potential (collectively, the
         "Clients"), including without limitation, all confidential technical
         information of the Company, secrets, trade secrets, formulas,
         proprietary software, copyrights, Client lists, lists of Consultants,
         confidential evaluations, mailing lists, details of consultant
         contracts, pricing policies, sales data and reports, margins,
         operational methods and processes, marketing plans or strategies,
         business acquisition plans, new personnel acquisition plans, financial
         information and other confidential business affairs, learned by
         Consultant concerning the Company, its Clients, or a third party,
         including without limitation, any subsidiaries, partners, affiliates,
         shareholders, Consultants, lenders, suppliers, consultants, agents or
         joint venture partners of the Company (collectively, "Affiliates"); and

                           (ii) covenants and agrees that (A) all confidential
         memoranda, notes, sketches, lists (including, without limitation,
         mailing and customer lists), records, other confidential documents and
         computer diskettes (and all copies thereof) made or compiled by
         Consultant or made available to her concerning the Company, its Clients
         and any Affiliates are the sole property of the Company, and (B) if
         such documents are in the possession or control of Consultant,
         Consultant shall deliver them, without retaining any copies thereof, to
         the Company promptly at the end of the Consulting Term, or at any other
         time upon request by the Company.

                  6.  Non-Competition Agreement.

                  (a) Consultant covenants and agrees that Consultant shall not,
directly or indirectly, as a principal, employee, partner, consultant, agent or
otherwise, compete or assist in competitive activity with the Company, within
the areas in which the Company then operates, during the Consulting Term and for
a period of one year thereafter (the period of time during which Consultant is
restricted from such competition pursuant to the foregoing provisions is
hereinafter referred to as the "Restricted Period") without the express prior
written consent of the Company only if any payment is being made. Without
limiting the generality of what might constitute competitive activity,
Consultant acknowledges and agrees that any fiber-optic competitive access
provider, competitive or incumbent local exchange carrier or inter-exchange
carrier shall constitute competitive activity.


                                       5
<PAGE>   6

                  (b) During the Restricted Period, Consultant shall not
directly or indirectly, alone or in concert with others, solicit or accept the
business of any customer (or any person or entity whom the Company or any of its
Consultants or agents has solicited as a prospective customer) ("Customer") (nor
provide any services to any Customer) which was a Customer of the Company at any
time during the Consulting Term.

                  (c) During the Restricted Period, Consultant shall not,
directly or indirectly, alone or in concert with others, solicit or encourage
any employee of the Company, or an employee of any person or entity with which
the Company has an agreement through which the Company and the person or entity
are to act in concert with respect to the business of the Company (an "
Employee"), to leave their respective employment or hire any Employee of the
Company or any person who was an Employee of the Company at any time within the
one (1) year period prior to the date first above written.

                  (d) During the Restricted Period, Consultant shall not,
directly or indirectly, alone or in concert with others, encourage any
third-party consultant which is then under contract with the Company to cease to
work for the Company or any third-party consultant.

                  (e) Notwithstanding anything in this Section 6 to the
contrary, Consultant may perform under the terms of that certain agreement dated
April 1, 1998 between Consultant and his former employer IXC Carrier, Inc.

                  7.  Non-Waiver of Rights. The Company's failure to enforce at
any time any of the provisions of this Consulting Agreement or to require at any
time performance by the Consultant of any of the provisions hereof shall in no
way be construed to be a waiver of such provisions or to affect either the
validity of this Consulting Agreement, or any part of it, or the right of the
Company thereafter to enforce each and every provision in accordance with the
terms of this Consulting Agreement. The Consultant's failure to enforce at any
time any of the provisions of this Consulting Agreement or to require at any
time performance by the Company of any of the provisions hereof shall in no way
be construed to be a waiver of such provisions or to affect either the validity
of this Consulting Agreement, or any part of it, or the right of the Consultant
thereafter to enforce each and every provision in accordance with the terms of
this Consulting Agreement.

                  8.  Other noncompetition obligations. Consultant represents 
and warrants to the Company that Consultant is not a party to any agreement
containing a noncompetition provision or other restriction with respect to the
nature of any services or business that Consultant is entitled to perform or
conduct for the Company.

                  9.  Limited Liability. With regard to the services to be
performed by Consultant pursuant to the terms of this Consulting Agreement,
neither Consultant nor any Consultants or agents of Consultant shall be liable
to DTI, or to anyone who may claim any 


                                       6
<PAGE>   7

right due to this relationship with DTI, for any action or omission in the
performance of said services on the part of Consultant or on the part of the
agents or Consultants of Consultant, except when said acts or omissions of
Consultant or such agents or Consultants are due to willful misconduct or gross
negligence. DTI shall hold Consultant free and harmless from any obligations,
costs, claims judgments attorneys fees and attachments arising from or growing
out of the services rendered to DTI pursuant to the terms of this Consulting
Agreement, except when the same shall arise due to the intentional misconduct or
gross negligence of Consultant, and Consultant is determined to have committed
intentional misconduct or gross negligence by the arbitration proceedings
provided herein.

                  10. Assignments. This Consulting Agreement shall be freely
assignable by the Company and shall inure to the benefit of, and be binding
upon, the Company, its successors and assigns and/or any other corporate entity
which shall succeed to the business presently being operated by the Company,
but, being a contract for personal services, neither this Consulting Agreement
nor any rights hereunder are assignable by Consultant.

                  11. Governing Law/Arbitration. This Consulting Agreement shall
be interpreted in accordance with and governed by the laws of the State of
Missouri without regard to its conflict of law rules. Any dispute arising out of
or relating to this Agreement or the breach, termination or validity hereof,
other than Section 5 and Section 6, shall be settled by arbitration in St. Louis
County, Missouri in accordance with the commercial arbitration rules then in
effect of the American Arbitration Association. The parties consent to the
jurisdiction of the Supreme Court of the State of Missouri, and of the United
States District Court for the Eastern District of the State of Missouri for
injunctive, specific enforcement or other relief in aid of the arbitration
proceedings or to enforce judgment of the award in such arbitration proceeding.
The award entered by the arbitrator(s) shall be final and binding on all parties
to arbitration. Each party shall bear its respective arbitration expenses and
shall each pay its pro rata portion of the arbitrator's charges and expenses.
[The arbitrator(s) shall not award punitive, exemplary or consequential
damages.]

                  With respect to disputes arising out of Section 5 and Section
6 of this Agreement, the parties agree that exclusive venue and jurisdiction for
any action brought under this Consulting Agreement shall lie in the County of
St. Louis, Missouri.

                  12. Amendments. No modification, amendment or waiver of any of
the provisions of this Consulting Agreement shall be effective unless in writing
and signed by the parties hereto.

                  13. Notices. Any notices to be given by either party hereunder
shall be in writing and shall be deemed to have been duly given if delivered or
mailed, certified or registered mail, postage prepaid, as follows: to the
Company at Digital Teleport, Inc., 11111 Dorsett Road, St. Louis, Missouri
63043, Attn.: Richard D. Weinstein, President; and to Consultant at 3 Wood 


                                       7
<PAGE>   8

Acre Drive #78, Whitney, Texas 76692; or to such other address as may have been
furnished to the other party in writing.

                  14. Reflection and Advice of Counsel Encouraged. This
Consulting Agreement places restrictions on Consultant's right to seek
employment or consult with certain employers or to engage in businesses
competitive with the Company's business. By signing this Consulting Agreement,
Consultant acknowledges that he or she has had ample time to reflect on these
restrictions and has sought the advice of counsel with respect to this
Consulting Agreement.

                  15. Entire Agreement. This Consulting Agreement is the entire
agreement between the parties and supersedes any previous oral or written
agreement or understanding between the Company and Consultant with respect to
the subject matter hereof, including without limitation that certain consulting
agreement dated April 20, 1998. There are no representations, warranties,
promises or undertakings other than those expressly contained in this Consulting
Agreement.

                  16. Severability. Subject to severability provisions integral
to any paragraph of this Agreement, the unenforceability, invalidity or
illegality of any provision of this Agreement shall not affect or impair the
continuing enforceability or validity of any other part of this Agreement, all
of which shall survive and be valid and enforceable.

                  17. Counterparts. This Consulting Agreement may be executed in
two or more counterparts, each of which shall be deemed an original, but all of
which together shall constitute one and the same instrument.

                  18. Headings. The headings in this Consulting Agreement are
for reference purposes only and shall not in any way affect the meaning or
interpretation of this Consulting Agreement.

                  19. Relationship Consultant and the Company agree that the
relationship contemplated by this Agreement is that of a consultant and not an
employee. Consultant agrees to pay all applicable taxes with respect to the
compensation provided hereunder and hold Company harmless with respect to same
or with respect to any determination that Consultant should be considered an
employee of the Company. Consultant agrees that he is not entitled to any
benefits or remuneration from the Company other than as expressly set forth
herein, including without limitation any medical or vacation benefits, or any
options of the Company. The Company will issue the Consultant a Form 1099 with
respect to the compensation paid to him hereunder unless otherwise required by
law.


                                       8
<PAGE>   9

                  IN WITNESS WHEREOF, the parties have executed this Consulting
Agreement as of the date first above written.


                                                DIGITAL TELEPORT, INC.



                                                By: /s/  Richard D. Weinstein
                                                   --------------------------
                                                Name: Richard D. Weinstein
                                                Title:  President


                                                CONSULTANT

                                                    /s/  H. P. Scott
                                                -----------------------------
                                                      H.P. Scott





                                       9

<PAGE>   1
DTI Holdings, Inc.
Computation of Ratio of Earnings to Fixed Charges

                                                                    Exhibit 12.1


<TABLE>
<CAPTION>
                                                                                                 Nine Months Ended
                                                 Fiscal Year Ended June 30,                           March 31,
                                               1995             1996            1997            1997            1998
                                               ----             ----            ----            ----            ----

SELECTED HISTORICAL DATA
Earnings were calculated as follows:
<S>                                         <C>            <C>             <C>              <C>             <C>
Income (loss) before taxes                     (286,732)      (786,375)      (1,851,764)      (1,902,277)     (4,864,286)
Add:  Fixed charges                             204,784      1,672,114        1,454,130        1,576,443       4,044,536
Deduct:  Capitalized Interest                    (9,516)    (1,227,149)        (562,750)        (562,750)       (182,000) 
                                              ---------     ----------       ----------       ----------      ----------
Earnings...................................     (91,464)      (341,410)        (960,384)        (888,584)       (819,750) 
                                              =========     ==========       ==========       ==========      ==========

Fixed charges were calculated as follows:
Amortization of deferred financing costs              0              0                0                0         106,110
Interest expense                                162,777        384,859           51,023          152,937       3,697,605
Portion of rentals attributable to interest      32,491         60,106           55,857           76,256          58,821
Loan commitment fees                                  0              0          784,500          784,500               0
Capitalized interest                              9,516      1,227,149          562,750          562,750         182,000
                                              ---------     ----------       ----------       ----------      ----------
Fixed charges..............................     204,784      1,672,114        1,454,130        1,576,443       4,044,536
                                              =========     ==========       ==========       ==========      ==========
Ratio fixed earnings to fixed charges            n/a            n/a             n/a               n/a

Deficiency                                      296,248      2,013,524        2,414,514        2,465,027       4,864,286
</TABLE>


<PAGE>   1
                                                                   EXHIBIT 23.1


INDEPENDENT AUDITORS' CONSENT

We consent to the use in this Amendment No. 1 to the Registration Statement    
No. 333-50049 of DTI Holdings, Inc. on Form S-4 of our report dated September
10, 1997 (July 13, 1998 as to Notes 13 and 14) appearing in the Prospectus,
which is a part of such Registration Statement.

We also consent to the reference to us under the headings "Summary Consolidated
Financial and Operating Data", "Selected Consolidated Financial and Operating 
Data" and "Experts" in such Prospectus.





/s/ DELOITTE & TOUCHE LLP
St. Louis, Missouri
July 13, 1998






<PAGE>   1
                                                                    EXHIBIT 25.1

                                CONFORMED COPY
================================================================================


                                    FORM T-1

                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                            STATEMENT OF ELIGIBILITY
                   UNDER THE TRUST INDENTURE ACT OF 1939 OF A
                    CORPORATION DESIGNATED TO ACT AS TRUSTEE

                      CHECK IF AN APPLICATION TO DETERMINE
                      ELIGIBILITY OF A TRUSTEE PURSUANT TO
                             SECTION 305(b)(2) |__|

                              THE BANK OF NEW YORK
               (Exact name of trustee as specified in its charter)


New York                                         13-5160382
(State of incorporation                          (I.R.S. employer
if not a U.S. national bank)                     identification no.)

48 Wall Street, New York, N.Y.                     10286
(Address of principal executive offices)         (Zip code)


                              DTI HOLDINGS, INC
             (Exact name of obligor as specified in its charter)


Missouri                                               43-1674259
(State or other jurisdiction of                        (I.R.S. employer
incorporation or organization)                         identification no.)


11111 Dorsett Road
St. Louis, Missouri                                    63043
(Address of principal executive offices)               (Zip code)

                                                       ----------------------

                     12-1/2% Series B Senior Discount Notes
                                    due 2008
                       (Title of the indenture securities)


================================================================================





<PAGE>   2

1.       GENERAL INFORMATION.  FURNISH THE FOLLOWING INFORMATION AS TO THE
         TRUSTEE: 

         (A)      NAME AND ADDRESS OF EACH EXAMINING OR SUPERVISING AUTHORITY
                  TO WHICH IT IS SUBJECT.



                  ---------------------------------------------------
                  Name                                        Address
                  ---------------------------------------------------

         Superintendent of Banks of the State of    2 Rector Street, New York,
         New York                                   N.Y.  10006, and Albany,
                                                    N.Y. 12203 
 
         Federal Reserve Bank of New York           33 Liberty Plaza, New York,
                                                    N.Y.  10045

         Federal Deposit Insurance Corporation      Washington, D.C.  20429

         New York Clearing House Association        New York, New York   10005

         (B)      WHETHER IT IS AUTHORIZED TO EXERCISE CORPORATE TRUST POWERS.

         Yes.

2.       AFFILIATIONS WITH OBLIGOR.

         IF THE OBLIGOR IS AN AFFILIATE OF THE TRUSTEE, DESCRIBE EACH SUCH
         AFFILIATION.

         None.

16.      LIST OF EXHIBITS.

         EXHIBITS IDENTIFIED IN PARENTHESES BELOW, ON FILE WITH THE COMMISSION,
         ARE INCORPORATED HEREIN BY REFERENCE AS AN EXHIBIT HERETO, PURSUANT TO
         RULE 7A-29 UNDER THE TRUST INDENTURE ACT OF 1939 (THE "ACT") AND 17
         C.F.R. 229.10(D).

         1.       A copy of the Organization Certificate of The Bank of New York
                  (formerly Irving Trust Company) as now in effect, which
                  contains the authority to commence business and a grant of
                  powers to exercise corporate trust powers. (Exhibit 1 to
                  Amendment No. 1 to Form T-1 filed with Registration Statement
                  No. 33-6215, Exhibits 1a and 1b to Form T-1 filed with
                  Registration Statement No. 33-21672 and Exhibit 1 to Form T-1
                  filed with Registration Statement No. 33-29637.)

         4.       A copy of the existing By-laws of the Trustee. (Exhibit 4 to
                  Form T-1 filed with Registration Statement No. 33-31019.)

         6.       The consent of the Trustee required by Section 321(b) of the
                  Act. (Exhibit 6 to Form T-1 filed with Registration Statement
                  No. 33-44051.)

         7.       A copy of the latest report of condition of the Trustee
                  published pursuant to law or to the requirements of its
                  supervising or examining authority.






<PAGE>   3




                               CONFORMED COPY


                                  SIGNATURE


         Pursuant to the requirements of the Act, the Trustee, The Bank of New
York, a corporation organized and existing under the laws of the State of New
York, has duly caused this statement of eligibility to be signed on its behalf
by the undersigned, thereunto duly authorized, all in The City of New York, and
State of New York, on the 13th day of April, 1998.


                                            THE BANK OF NEW YORK



                                            By: /s/THOMAS B. ZAKRZEWSKI
                                                --------------------------------
                                                Name:  THOMAS B. ZAKRZEWSKI
                                                Title: ASSISTANT VICE PRESIDENT








<PAGE>   4
                                                                       EXHIBIT 7


- --------------------------------------------------------------------------------
                       Consolidated Report of Condition of

                              THE BANK OF NEW YORK

                     of 48 Wall Street, New York, N.Y. 10286
                     And Foreign and Domestic Subsidiaries,
a member of the Federal Reserve System, at the close of business September 30,
1997, published in accordance with a call made by the Federal Reserve Bank of
this District pursuant to the provisions of the Federal Reserve Act.

<TABLE>
<CAPTION>
                                                   Dollar Amounts
ASSETS                                               in Thousands
<S>                                                <C>
Cash and balances due from depos-
  itory institutions:
  Noninterest-bearing balances and
  currency and coin ..................                $ 5,004,638

  Interest-bearing balances ..........                  1,271,514
Securities:
  Held-to-maturity securities ........                  1,105,782
  Available-for-sale securities ......                  3,164,271
Federal funds sold and Securities pur-
chased under agreements to resell......                 5,723,829
Loans and lease financing
  receivables:
  Loans and leases, net of unearned
    income .................34,916,196
  LESS: Allowance for loan and
    lease losses ..............581,177
  LESS: Allocated transfer risk
    reserve........................429
    Loans and leases, net of unearned
    income, allowance, and reserve                     34,334,590
Assets held in trading accounts ......                  2,035,284
Premises and fixed assets (including
  capitalized leases) ................                    671,664
Other real estate owned ..............                     13,306
Investments in unconsolidated
  subsidiaries and associated
  companies ..........................                    210,685
Customers' liability to this bank on
  acceptances outstanding ............                  1,463,446
Intangible assets ....................                    753,190
Other assets .........................                  1,784,796
                                                      -----------
Total assets .........................                $57,536,995
                                                      ===========

LIABILITIES
Deposits:
  In domestic offices ................                $27,270,824
  Noninterest-bearing ......12,160,977
  Interest-bearing .........15,109,847
  In foreign offices, Edge and
  Agreement subsidiaries, and IBFs ...                 14,687,806
  Noninterest-bearing .........657,479
  Interest-bearing .........14,030,327
Federal funds purchased and Securities
  sold under agreements to repurchase.                  1,946,099
Demand notes issued to the U.S.
  Treasury ...........................                    283,793
Trading liabilities ..................                  1,553,539
Other borrowed money:
  With remaining maturity of one year
    or less ..........................                  2,245,014
  With remaining maturity of more than
one year through three years..........                          0
  With remaining maturity of more than
    three years .........................                  45,664
Bank's liability on acceptances exe-
  cuted and outstanding ..............                  1,473,588
Subordinated notes and debentures ....                  1,018,940
Other liabilities ....................                  2,193,031
                                                      -----------
Total liabilities ....................                 52,718,298
                                                      -----------

EQUITY CAPITAL
Common stock ........................                   1,135,284
Surplus .............................                     731,319
Undivided profits and capital
  reserves ..........................                   2,943,008
Net unrealized holding gains
  (losses) on available-for-sale
  securities ........................                      25,428
Cumulative foreign currency transla-
  tion adjustments ..................                (    16,342)
                                                     ------------
Total equity capital ................                   4,818,697
                                                      -----------
Total liabilities and equity                       
  capital ...........................                 $57,536,995
                                                      ===========
</TABLE>

      I, Robert E. Keilman, Senior Vice President and Comptroller of the
above-named bank do hereby declare that this Report of Condition has been
prepared in conformance with the instructions issued by the Board of Governors
of the Federal Reserve System and is true to the best of my knowledge and
belief.

                                                      Robert E. Keilman

      We, the undersigned directors, attest to the correctness of this Report of
Condition and declare that it has been examined by us and to the best of our
knowledge and belief has been prepared in conformance with the instructions
issued by the Board of Governors of the Federal Reserve System and is true and
correct.

                          
      J. Carter Bacot     )
      Thomas A. Renyi     )
      Alan R. Griffith    )    Directors
                          


- --------------------------------------------------------------------------------

<TABLE> <S> <C>

<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE AUDITED
CONSOLIDATED FINANCIAL STATEMENTS FOR THE YEAR ENDED JUNE 30, 1997 AND THE
UNAUDITED CONSOLIDATED FINANCIAL STATEMENTS FOR THE NINE MONTHS ENDED MARCH 31,
1998
</LEGEND>
       
<S>                             <C>                     <C>
<PERIOD-TYPE>                   YEAR                   9-MOS
<FISCAL-YEAR-END>                          JUN-30-1997             MAR-31-1998
<PERIOD-END>                               JUN-30-1997             MAR-31-1998
<CASH>                                       4,366,906             263,231,384
<SECURITIES>                                         0                       0
<RECEIVABLES>                                  159,268                 708,477
<ALLOWANCES>                                    48,000                 167,000
<INVENTORY>                                          0                       0
<CURRENT-ASSETS>                             4,549,938             263,974,628
<PP&E>                                      34,000,634              60,824,950
<DEPRECIATION>                               1,235,640               2,620,640
<TOTAL-ASSETS>                              39,849,136             338,467,861
<CURRENT-LIABILITIES>                        6,269,614               7,037,000
<BONDS>                                              0             268,856,985
                       28,889,165                       0
                                          0                       0
<COMMON>                                       300,000                 300,000
<OTHER-SE>                                 (5,029,867)               4,222,985
<TOTAL-LIABILITY-AND-EQUITY>                         0             338,467,861
<SALES>                                              0                       0
<TOTAL-REVENUES>                             2,033,990               2,122,574
<CGS>                                                0                       0
<TOTAL-COSTS>                                3,087,667               4,848,153
<OTHER-EXPENSES>                                     0                       0
<LOSS-PROVISION>                                     0                       0
<INTEREST-EXPENSE>                             152,937               3,697,605
<INCOME-PRETAX>                            (1,851,764)             (4,864,286)
<INCOME-TAX>                               (1,214,331)             (2,020,000)
<INCOME-CONTINUING>                          (637,433)             (2,725,579)
<DISCONTINUED>                                       0                       0
<EXTRAORDINARY>                                      0                       0
<CHANGES>                                            0                       0
<NET-INCOME>                                 (637,433)             (2,844,286)
<EPS-PRIMARY>                                        0                       0
<EPS-DILUTED>                                        0                       0
        

</TABLE>

<PAGE>   1
                                                               EXHIBIT 99.1

                              LETTER OF TRANSMITTAL
                               DTI HOLDINGS, INC.
          OFFER TO EXCHANGE ITS 12 1/2% SERIES B SENIOR DISCOUNT NOTES
             DUE 2008 ("EXCHANGE NOTES") FOR ALL OF ITS OUTSTANDING
            12 1/2% SENIOR DISCOUNT NOTES DUE 2008 ("PRIVATE NOTES")
             PURSUANT TO ITS PROSPECTUS DATED _______________, 1998


<TABLE>
<CAPTION>
<S>                       <C>                      <C>                        <C>             

- ----------------------------------------------------------------------------------------------------------------------------------
                      THE EXCHANGE OFFER WILL EXPIRE AT 5:00 P.M. NEW YORK CITY TIME, ON _____________, 1998,
                              UNLESS EXTENDED BY THE COMPANY (THE "EXPIRATION DATE").  TENDERS MAY BE
                             WITHDRAWN PRIOR TO 5:00 P.M., NEW YORK CITY TIME, ON THE EXPIRATION DATE.
- ----------------------------------------------------------------------------------------------------------------------------------

                                        Delivery To: The Bank of New York, Exchange Agent

                                                        By Overnight Courier or Hand:                      By Facsimile:
                     By Mail                                 The Bank of New York                         (212) 571-____
              The Bank of New York                        101 Barclay St., Floor 7E                 (for Eligible Institutions
            101 Barclay St., Floor 7E              Corporate Trust & Agency Services Window                    only)
            New York, New York 10286                       New York, New York 10286                    Confirm by Telephone
        Attention: Reorganization Section             Attention: Reorganization Section                   (212) 815-____


         List below the Private Notes to which this Letter of Transmittal
relates. If the space provided below is inadequate, the certificate numbers and
principal amount of Private Notes should be listed on a separate signed schedule
affixed hereto.

 ----------------------------------------------------------------------------------------------------------------------------------
                            DESCRIPTION OF PRIVATE NOTES                                    1               2               3
 ----------------------------------------------------------------------------------------------------------------------------------

                                                                                                        Aggregate
                                                                                                        Principal
                                                                                       Certificate      Amount of       Principal
                   Name(s) and Address(es) of Registered Holder(s)                      Number(s)*       Private         Amount
                             (Please fill in, if blank)                                   Total          Note(s)       Tendered**
 ----------------------------------------------------------------------------------------------------------------------------------
                                                                                      --------------- -------------- ---------------

                                                                                      --------------- -------------- ---------------
                                                                                      --------------- -------------- ---------------

                                                                                      --------------- -------------- ---------------
                                                                                      --------------- -------------- ---------------

                                                                                      --------------- -------------- ---------------
                                                                                      --------------- -------------- ---------------

                                                                                      --------------- -------------- ---------------
                                                                                      --------------- -------------- ---------------

                                                                                      --------------- -------------- ---------------
                                                                                      --------------- -------------- ---------------

                                                                                      --------------- -------------- ---------------
                                                                                      --------------- -------------- ---------------

                                                                                      --------------- -------------- ---------------
                                                                                      --------------- -------------- ---------------

                                                                                          Total
 -----------------------------------------------------------------------------------------------------------------------------------
</TABLE>

  * Need not be completed if Private Notes are being tendered by book-entry 
    transfer.
 ** Unless otherwise indicated in this column, a holder will be deemed to have
    tendered ALL of the Private Notes represented by the Private Notes indicated
    in column 2. See Instruction 2. Private Notes tendered hereby must be in
    denominations of principal amount of $1,000 and any integral multiple
    thereof. See Instruction 1.

  [  ]   CHECK HERE IF TENDERED PRIVATE NOTES ARE BEING DELIVERED BY BOOK-ENTRY 
         TRANSFER MADE TO THE ACCOUNT MAINTAINED BY THE
         EXCHANGE AGENT WITH THE BOOK-ENTRY TRANSFER FACILITY AND COMPLETE THE 
         FOLLOWING:
         Name of Tendering Institution________________________________________
         Account Number_________________________  Transaction Code Number_______
  [  ]   CHECK HERE IF TENDERED PRIVATE NOTES ARE BEING DELIVERED PURSUANT TO A
         NOTICE OF GUARANTEED DELIVERY PREVIOUSLY SENT TO THE EXCHANGE AGENT AND
         COMPLETE THE FOLLOWING:
         Name(s) of Registered Holder(s)______________________________________
         Widow Ticket Number (if any)_________________________________________
         Date of Execution of Notice of Guaranteed Delivery___________________
         Name of Institution which guaranteed delivery _______________________
         IF DELIVERED BY BOOK-ENTRY TRANSFER, COMPLETE
         THE FOLLOWING:
         Account Number________________________   Transaction Code Number_______
  

<PAGE>   2


         Name of Institution which guaranteed delivery_________________________

         IF DELIVERED BY BOOK-ENTRY TRANSFER, COMPLETE THE FOLLOWING:

         Account Number_________________     Transaction Code Number____________
[  ]     CHECK HERE IF YOU ARE A BROKER-DEALER WHO HOLDS PRIVATE NOTES ACQUIRED
         FOR YOUR OWN ACCOUNT AS A RESULT OF MARKET-MAKING OR OTHER TRADING
         ACTIVITIES AND WISH TO RECEIVE COPIES OF THE PROSPECTUS AND COPIES OF
         ANY AMENDMENTS OR SUPPLEMENTS THERETO FOR USE IN CONNECTION WITH
         RESALES OF EXCHANGE NOTES RECEIVED FOR YOUR OWN ACCOUNT IN EXCHANGE FOR
         SUCH PRIVATE NOTES.

         Name:_____________________________________________________

         Address:___________________________________________________

         Aggregate Principal Amount of Private Notes so held: $______________


         DELIVERY OF THIS INSTRUMENT TO AN ADDRESS OTHER THAN AS SET FORTH
ABOVE, OR TRANSMISSION OF INSTRUCTIONS VIA FACSIMILE OTHER THAN AS SET FORTH
ABOVE, WILL NOT CONSTITUTE A VALID DELIVERY.

         THE INSTRUCTIONS CONTAINED HEREIN SHOULD BE READ CAREFULLY BEFORE THIS
LETTER OF TRANSMITTAL IS COMPLETED.

         The Company reserves the right, at any time or from time to time, to
extend the Exchange Offer at its sole discretion, in which event the term
"Expiration Date" shall mean the latest time and date to which the Exchange
Offer is extended. The Company shall notify the holders of the Private Notes of
any extension by means of a press release or other public announcement prior to
9:00 a.m., New York City time, on the next business day after the previously
scheduled Expiration Date.

         This Letter of Transmittal is to be completed by a holder of Private
Notes if certificates are to be forwarded herewith. If a tender of certificates
for Private Notes, if available, is to be made by book-entry transfer to the
account maintained by the Exchange Agent at The Depository Trust Company (the
"Book-Entry Transfer Facility") pursuant to the procedures set forth in "The
Exchange Offer--Book-Entry Transfer" section of the Prospectus, unless delivery
of such certificates is to be made by book entry transfer through the ATDP
system to the Exchange Agent's account maintained by DTC. Holders of Private
Notes whose certificates are not immediately available, or who are unable to
deliver their certificates or confirmation of the book-entry tender of their
Private Notes into the Exchange Agent's account at the Book-Entry Transfer
Facility (a "Book-Entry Confirmation") and all other documents required by this
Letter to the Exchange Agent on or prior to the Expiration Date, must tender
their Private Notes according to the guaranteed delivery procedures set forth in
"The Exchange Offer--Guaranteed Delivery Procedures" section of the Prospectus.
See Instruction 1. Delivery of documents to the Book-Entry Transfer Facility
does not constitute delivery to the Exchange Agent.


                                       2

<PAGE>   3



               PLEASE READ THE ACCOMPANYING INSTRUCTIONS CAREFULLY

Ladies and Gentlemen:

         The undersigned hereby tenders to DTI Holdings, Inc., a Missouri
corporation (the "Company"), the aggregate principal amount of Private Notes
indicated in this Letter of Transmittal, upon the terms and subject to the
conditions set forth in the Company's Prospectus dated ______________, 1998 (the
"Prospectus"), receipt of which is hereby acknowledged, and in this Letter of
Transmittal, which together constitute the Company's offer (the "Exchange
Offer") to exchange $1,000 principal amount at maturity of its 12 1/2% Series B
Senior Discount Notes due _____________ 2008, which have been registered under
the Securities Act of 1933, as amended (the "Exchange Notes"), for each $1,000
principal amount at maturity of its issued and outstanding 12 1/2% Senior
Discount Notes due 2008, of which $506,000,000 aggregate principal amount at
maturity was outstanding on the date of the Prospectus (the "Private Notes" and,
together with the Exchange Notes, the "Notes"). The capitalized terms which are
not defined herein are used herein as defined in the Prospectus.

         Subject to, and effective upon, the acceptance for exchange of the
Private Notes tendered hereby, the undersigned hereby sells, assigns and
transfers to, or upon the order of, the Company all right, title and interest in
and to such Private Notes as are being tendered hereby and hereby irrevocably
constitutes and appoints the Exchange Agent as attorney-in-fact of the
undersigned with respect to such Private Notes, with full power of substitution
(such power of attorney being an irrevocable power coupled with an interest),
to:

         (a) deliver such Private Notes in registered certificated form, or
         transfer ownership of such Private Notes through book-entry transfer at
         the Book-Entry Transfer Facility, to or upon the order of the Company,
         upon receipt by the Exchange Agent, as the undersigned's agent, of the
         same aggregate principal amount at maturity of Exchange Notes; and

         (b) receive, for the account of the Company, all benefits and otherwise
         exercise, for the account of the Company, all rights of beneficial
         ownership of the Private Notes tendered hereby in accordance with the
         terms of the Exchange Offer.

         The undersigned hereby represents and warrants that the undersigned has
full power and authority to tender, sell, assign and transfer the Private Notes
tendered hereby and that the Company will acquire good, marketable and
unencumbered title thereto, free and clear of all security interests, liens,
restrictions, charges, encumbrances, conditional sale agreements or other
obligations relating to their sale or transfer, and not subject to any adverse
claim when the same are accepted by the Company. The undersigned hereby further
represents that any Exchange Notes acquired in exchange for Private Notes
tendered hereby will have been acquired in the ordinary course of business of
the person receiving such Exchange Notes, whether or not such person is the
undersigned, that neither the holder of such Private Notes nor any such other
person has an arrangement or understanding with any person to participate in the
distribution of such Exchange Notes and that neither the holder of such Private
Notes nor any such other person is an "affiliate," as defined in Rule 405 under
the Securities Act of 1933, as amended (the "Securities Act"), of the Company.
The undersigned has read and agrees to all of the terms of the Exchange Offer.

         The undersigned also acknowledges that this Exchange Offer is being
made in reliance on interpretations by the staff of the Securities and Exchange
Commission (the "SEC"), as set forth in no-action letters issued to third
parties, that the Exchange Notes issued in exchange for the Private Notes
pursuant to the Exchange Offer may be offered for resale, resold and otherwise
transferred by holders thereof (other than any such holder that is an
"affiliate" of the Company within the meaning of Rule 405 under the Securities
Act), without compliance with the registration and prospectus delivery
provisions of the Securities Act, provided that such Exchange Notes are acquired
in the ordinary course of such holders' business and such holders have no
arrangement with any person to participate in the distribution of such Exchange
Notes. However, the Company does not intend to request the SEC to consider, and
the SEC has not considered, the Exchange Offer in the context of a no-action
letter, and there can be no assurance that the staff of the SEC would make a
similar determination with respect to the Exchange Offer as in other
circumstances. If the undersigned is not a broker-dealer, the undersigned
represents that it is not engaged in, and does not intend to engage in, a
distribution of Exchange Notes and has no arrangement or understanding to
participate in a distribution of Exchange Notes. If any holder is an affiliate
of the Company, is engaged in or intends to engage in or has any arrangement or
understanding with respect to the distribution of the Exchange Notes to be
acquired pursuant to the Exchange Offer, such holder (i) could not rely on the
applicable interpretations of the staff of the SEC and (ii) must comply with the
registration and prospectus delivery requirements of the Securities Act in
connection with any resale transaction. If the undersigned is a broker-dealer
that will receive Exchange Notes for its own account in exchange for Private
Notes acquired as a result of market-making or other trading activities (a
"Participating Broker-Dealer"), it represents that the Private Notes to be
exchanged for the Exchange Notes were acquired by it as a result of
market-making or other trading activities and acknowledges that it will deliver
a prospectus in connection with any resale of such Exchange Notes; however, by
so acknowledging and by delivering a prospectus, such Participating
Broker-Dealer will not be deemed to admit that it is an "underwriter" within the
meaning of the Securities Act.

         The Company has agreed that, subject to the provisions of the Notes
Registration Rights Agreement, the Prospectus, as it may be amended or
supplemented from time to time, may be used by a Participating Broker-Dealer in
connection with resales of Exchange Notes received in exchange for Private Notes
which were acquired by such Participating Broker-Dealer for its own account as a
result of market-making or other trading activities, for a period ending 120
days after the Expiration Date or, if earlier, when all such Exchange Notes have
been disposed of by such Participating Broker-Dealer. In that regard, each
Participating Broker-Dealer by tendering such Private Notes and executing this
Letter of Transmittal, agrees that, upon receipt of notice from the Company of
the occurrence of any event or the discovery of any fact which makes any
statement contained or incorporated by reference in the Prospectus untrue in any
material respect or which causes the Prospectus to omit to state a material fact
necessary in order to make the statements contained or incorporated by reference
therein, in light of the circumstances under which they were made, not
misleading, such Participating Broker-Dealer will suspend the sale of Exchange
Notes pursuant to the Prospectus until the Company has amended or supplemented
the Prospectus to correct such misstatement or omission and has furnished copies
of the amended or supplemented Prospectus to the Participating Broker-Dealer or
the Company has given notice that the sale of the Exchange Notes may be resumed,
as the case may be. If the Company gives such notice to suspend the sale of the
Exchange Notes, it shall extend the 120-day period referred to above during
which Participating Broker-Dealers are entitled to use the Prospectus in
connection with the resale of Exchange Notes by the number of days during the
period from and including the date of the giving of such notice to and including
the date when Participating Broker-Dealers shall have received copies of the
supplemented or amended Prospectus necessary to permit resales of the Exchange
Notes or to and including the date on which the Company has given notice that
the sale of Exchange Notes may be resumed, as the case may be.

         The undersigned will, upon request, execute and deliver any additional
documents deemed by the Company to be necessary or desirable to complete the
sale, assignment and transfer of the Private Notes tendered hereby. All
authority conferred or agreed to be conferred in this Letter of Transmittal and
every obligation of the undersigned hereunder shall be binding upon the
successors, 

                                       3

<PAGE>   4


assigns, heirs, executors, administrators, trustees in bankruptcy
and legal representatives of the undersigned and shall not be affected by, and
shall survive, the death or incapacity of the undersigned. This tender may be
withdrawn only in accordance with the procedures set forth in "The Exchange
Offer--Withdrawal of Tenders" section of the Prospectus.

         Unless otherwise indicated herein in the box entitled "Special Issuance
Instructions" below, please deliver the Exchange Notes (and, if applicable,
substitute certificates representing Private Notes for any Private Notes not
exchanged) in the name of the undersigned or, in the case of a book-entry
delivery of Private Notes, please credit the account indicated above maintained
at the Book-Entry Transfer Facility. Similarly, unless otherwise indicated under
the box entitled "Special Delivery Instructions" below, please send the Exchange
Notes (and, if applicable, substitute certificates representing Private Notes
for any Private Notes not exchanged) to the undersigned at the address shown
above in the box entitled "Description of Private Notes."

         THE UNDERSIGNED, BY COMPLETING THE BOX ENTITLED "DESCRIPTION OF PRIVATE
NOTES" ABOVE AND SIGNING THIS LETTER OF TRANSMITTAL, WILL BE DEEMED TO HAVE
TENDERED THE PRIVATE NOTES AS SET FORTH IN SUCH BOX ABOVE.

                                       4


<PAGE>   5

<TABLE>
<CAPTION>
<S>                         <C>                              <C>   
- ---------------------------------------------------------------------------------------------------------------------------------

SPECIAL ISSUANCE INSTRUCTIONS                                                       SPECIAL DELIVERY INSTRUCTIONS
(SEE INSTRUCTIONS 3 AND 4)                                                               (SEE INSTRUCTIONS 3 AND 4)
                                                                     
   To be completed ONLY if certificates for Private Notes not                       To be completed ONLY if certificates for Private
exchanged and/or Exchange Notes are to be issued in the                         Notes not exchanged and/or Exhcange Notes are to
name of and sent to someone other than the person or persons                    be sent to someone other than the person or 
whose signature(s) appear(s) below on this Letter of Transmittal,               persons whose signature(s) appear(s) below on 
or if Private Notes delivered by book-entry transfer which are                  this Letter of Transmittal or to such person or
not accepted for exchange are to be returned by credit to an                    persons at an address other than shown above in 
account maintained at the Book-Entry Transfer Facility other                    the box entitled "Description of Private Notes"
than the account indicated above.                                               on this Letter of Transmittal.
                                                                     
                                                                     
                                                                       
Issue: Exchange Notes and/or Private Notes to:           
Name(s) .....................................................
                    (PLEASE TYPE OR PRINT)                             Mail: Exchange Notes and/or Private Notes to:
 .............................................................
                    (PLEASE TYPE OR PRINT)                             Name(s) ....................................................
Address .....................................................                             (PLEASE TYPE OR PRINT)
 .............................................................
                                                   (ZIP CODE)          ............................................................
                                                                                          (PLEASE TYPE OR PRINT)
[ ] Credit unexchanged Private Notes delivered by
    book-entry transfer to the Book-Entry Transfer Facility
    account set forth below.                                           Address ....................................................

- ----------------------------------------------------------------
                 (Book-Entry Transfer Facility                         ............................................................
                Account Number, if applicable)                                                                           (ZIP CODE)
- ----------------------------------------------------------------       -------------------------------------------------------------

 IMPORTANT: A BOOK-ENTRY CONFIRMATION OR THIS LETTER OF TRANSMITTAL OR A FACSIMILE
 HEREOF (TOGETHER WITH THE CERTIFICATES FOR PRIVATE NOTES OR AND ALL OTHER REQUIRED
 DOCUMENTS OR THE NOTICE OF GUARANTEED DELIVERY) MUST BE RECEIVED BY THE EXCHANGE
      AGENT PRIOR TO 5:00 P.M., NEW YORK CITY TIME, ON THE EXPIRATION DATE.

                  PLEASE READ THIS ENTIRE LETTER OF TRANSMITTAL
                          CAREFULLY BEFORE COMPLETION.

- ------------------------------------------------------------------------------------------------------------------------------------

                                PLEASE SIGN HERE
                   (TO BE COMPLETED BY ALL TENDERING HOLDERS)
           (Complete Accompanying Substitute Form W-9 on reverse side)
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .                  . . . . . . . . . . . . . . . . . . . . . .
                                                                       
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .                  . . . . . . . . . . . . . . . . . . . . . .
                                                                       
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .                  . . . . . . . . . . . . . . . . . . . . . .
                                                                       
                                    Signature(s) of Owner                                                 Date

                  Area Code and Telephone Number ..............................................................

         If a holder is tendering any Private Notes, this Letter of Transmittal
must be signed by the registered holder(s) as the name(s) appear(s) on the
certificate(s) for the Private Notes or on a securities position listing or by
any person(s) authorized to become registered holder(s) by endorsements and
documents transmitted herewith. If signature is by a trustee, executor,
administrator, guardian, officer or other person acting in a fiduciary or
representative capacity, please set forth full title.
See Instruction 3.
Name(s):  .......................................................................................................................
 .................................................................................................................................
                             (Please Type or Print)
Capacity:  ......................................................................................................................
Address:  .......................................................................................................................
 .................................................................................................................................
                              (Including Zip Code)
                               SIGNATURE GUARANTEE 
                         (If required by Instruction 3)

Signature(s) Guaranteed by
an Eligible Institution:  .......................................................................................................
                             (Authorized Signature)
 .................................................................................................................................
                                     (Title)
 .................................................................................................................................
                                 (Name and Firm)
Dated:  ..................................................................................................................., 1998
- -----------------------------------------------------------------------------------------------------------------------------------
</TABLE>

                                       5


<PAGE>   6




                                 INSTRUCTIONS
                                      
               FORMING PART OF THE TERMS AND CONDITIONS OF THE
             OFFER OF DTI HOLDINGS, INC. TO EXCHANGE ITS 12 1/2%
              SERIES B SENIOR DISCOUNT NOTES DUE 2008 FOR ALL OF
                                     ITS
              OUTSTANDING 12 1/2% SENIOR DISCOUNT NOTES DUE 2008

1.      DELIVERY OF THIS LETTER OF TRANSMITTAL AND NOTES; GUARANTEED DELIVERY 
        PROCEDURES.

                  This Letter of Transmittal is to be completed by holders of
Private Notes if certificates are to be forwarded herewith. If tenders are to be
made pursuant to the procedures for delivery by book-entry transfer set forth in
"The Exchange Offer--Book-Entry Transfer" section of the Prospectus, unless
delivery of such certificates is to be made by book entry transfer through the
ATDP system to the Exchange Agent's account maintained by DTC. Certificates for
all physically tendered Private Notes, or Book-Entry Confirmation, as the case
may be, as well as a properly completed and duly executed Letter of Transmittal
(or manually signed facsimile hereof) and any other documents required by this
Letter of Transmittal, must be received by the Exchange Agent at the address set
forth herein on or prior to the Expiration Date, or the tendering holder must
comply with the guaranteed delivery procedures set forth below. Private Notes
tendered hereby must be in denominations of principal amount at maturity of
$1,000 and any integral multiple thereof.

                  Holders of Private Notes whose certificates for Private Notes
are not immediately available or who cannot deliver their certificates and all
other required documents to the Exchange Agent on or prior to the Expiration
Date, or who cannot complete the procedure for book-entry transfer on a timely
basis, may tender their Private Notes pursuant to the guaranteed delivery
procedures set forth in "The Exchange Offer--Guaranteed Delivery Procedures"
section of the Prospectus. Pursuant to such procedures, (i) such tender must be
made through an Eligible Institution (as defined below), (ii) prior to the
Expiration Date, the Exchange Agent must receive from such Eligible Institution
a properly completed and duly executed Letter of Transmittal (or a facsimile
thereof) and Notice of Guaranteed Delivery, substantially in the form provided
by the Company (by telegram, telex, facsimile transmission, mail or hand
delivery), setting forth the name and address of the holder of Private Notes and
the amount of Private Notes tendered, stating that the tender is being made
thereby and guaranteeing that within five New York Stock Exchange ("NYSE")
trading days after the date of execution of the Notice of Guaranteed Delivery,
the certificates for all physically tendered Private Notes, or a Book-Entry
Confirmation, and any other documents required by this Letter of Transmittal
will be deposited by the Eligible Institution with the Exchange Agent, and (iii)
the certificates for all physically tendered Private Notes, in proper form for
transfer, or Book-Entry Confirmation, as the case may be, and all other
documents required by this Letter of Transmittal, are received by the Exchange
Agent within five NYSE trading days after the date of execution of the Notice of
Guaranteed Delivery.

                  THE METHOD OF DELIVERY OF THIS LETTER OF TRANSMITTAL, THE
PRIVATE NOTES AND ALL OTHER REQUIRED DOCUMENTS IS AT THE ELECTION AND RISK OF
THE TENDERING HOLDERS, BUT THE DELIVERY WILL BE DEEMED MADE ONLY WHEN ACTUALLY
RECEIVED OR CONFIRMED BY THE EXCHANGE AGENT. INSTEAD OF DELIVERY BY MAIL, IT IS
RECOMMENDED THAT HOLDERS USE AN OVERNIGHT OR HAND DELIVERY SERVICE, PROPERLY
INSURED. IN ALL CASES, SUFFICIENT TIME SHOULD BE ALLOWED TO ASSURE DELIVERY TO
THE EXCHANGE AGENT PRIOR TO 5:00 P.M., NEW YORK CITY TIME, ON THE EXPIRATION
DATE. DO NOT SEND THIS LETTER OF TRANSMITTAL OR ANY PRIVATE NOTES TO THE
COMPANY.

                  See "The Exchange Offer" section of the Prospectus.

2. PARTIAL TENDERS (NOT APPLICABLE TO HOLDERS OF PRIVATE NOTES WHO TENDER BY
BOOK-ENTRY TRANSFER); WITHDRAWAL RIGHTS

                  Tenders of Private Notes will be accepted only in the
principal amount at maturity of $1,000 and integral multiples thereof. If less
than all of the Private Notes evidenced by a submitted certificate are to be
tendered, the tendering holder(s) should fill in the aggregate principal amount
at maturity of Private Notes to be tendered in the box above entitled
"Description of Private Notes--Principal Amount Tendered." A reissued
certificate representing the balance of nontendered Private Notes will be sent
to such tendering holder, unless otherwise provided in the appropriate box on
this Letter of Transmittal, promptly after the Expiration Date. ALL OF THE
PRIVATE NOTES DELIVERED TO THE EXCHANGE AGENT WILL BE DEEMED TO HAVE BEEN
TENDERED UNLESS OTHERWISE INDICATED.

                  Except as otherwise provided herein, tenders of Private Notes
may be withdrawn at any time on or prior to the Expiration Date. In order for a
withdrawal to be effective on or prior to that time, a written, telegraphic,
telex or facsimile transmission of such notice of withdrawal must be timely
received by the Exchange Agent at one of its addresses set forth above on or
prior to the Expiration Date. Any such notice of withdrawal must specify the
name of the person who tendered the Private Notes to be withdrawn, the aggregate
principal amount of Private Notes to be withdrawn and (if certificates for such
Private Notes have been tendered) the name of the registered holder of the
Private Notes as set forth on the certificate for the Private Notes, if
different from that of the person who tendered such Private Notes. If
certificates for the Private Notes have been delivered or otherwise identified
to the Exchange Agent, then prior to the physical release of such certificates
for the Private Notes, the tendering holder must submit the serial numbers shown
on the particular certificates for the Private Notes to be withdrawn and the
signature on the notice of withdrawal must be guaranteed by an Eligible
Institution, except in the case of Private Notes tendered for the account of an
Eligible Institution. If Private Notes have been tendered pursuant to the
procedures for book-entry transfer set forth in "The Exchange Offer--Book-Entry
Transfer" section of the Prospectus, the notice of withdrawal must specify the
name and number of the account at the Book-Entry Transfer Facility to be
credited with the withdrawal of Private Notes, in which case a notice of
withdrawal will be effective if delivered to the Exchange Agent by written,
telegraphic, telex or facsimile transmission. Withdrawals of tenders of Private
Notes may not be rescinded. Private Notes properly withdrawn will not be deemed
to have been validly tendered for purposes of the Exchange Offer, and no
Exchange Notes will be issued with respect thereto unless the Private Notes so
withdrawn are validly retendered. Properly withdrawn Private Notes may be
retendered at any subsequent time on or prior to the Expiration Date by
following the procedures described in the Prospectus under "The Exchange
Offer--Procedures for Tendering."

                  All questions as to the validity, form and eligibility
(including time of receipt) of such withdrawal notices will be determined by the
Company, in its sole discretion, whose determination shall be final and binding
on all parties. Neither the Company, any employees, agents, affiliates or
assigns of the Company, the Exchange Agent nor any other person shall be under
any duty to give any notification of any irregularities in any notice of
withdrawal or incur any liability for failure to give such notification. Any
Private Notes which have been tendered but which are withdrawn will be returned
to the holder thereof without cost to such holder as promptly as practicable
after withdrawal.

3.       SIGNATURES ON THIS LETTER OF TRANSMITTAL; BOND POWERS AND ENDORSEMENTS;
         GUARANTEE OF SIGNATURES

                  If this Letter of Transmittal is signed by the registered
holder of the Private Notes tendered hereby, the signature 

                                       6

<PAGE>   7

must correspond exactly with the name as written on the face of the certificates
or on a securities position listing without any change whatsoever.

                  If any tendered Private Notes are owned of record by two or
more joint owners, all of such owners must sign this Letter of Transmittal.

                  If any tendered Private Notes are registered in different
names on several certificates or securities positions listings, it will be
necessary to complete, sign and submit as many separate copies of this Letter of
Transmittal as there are different registrations.

                  When this Letter of Transmittal is signed by the registered
holder or holders of the Private Notes specified herein and tendered hereby, no
endorsements of certificates or separate bond powers are required. If, however,
the Exchange Notes are to be issued, or any untendered Private Notes are to be
reissued, to a person other than the registered holder, then endorsements of any
certificates transmitted hereby or separate bond powers are required. Signatures
on such certificate(s) must be guaranteed by an Eligible Institution.

                  If this Letter of Transmittal is signed by a person other than
the registered holder or holders of any certificate(s) specified herein, such
certificate(s) must be endorsed or accompanied by appropriate bond powers, in
either case signed exactly as the name or names of the registered holder or
holders appear(s) on the certificate(s), and the signatures on such
certificate(s) must be guaranteed by an Eligible Institution.

                  If this Letter of Transmittal or any certificates or bond
powers are signed by trustees, executors, administrators, guardians,
attorneys-in-fact, officers of corporations or others acting in a fiduciary or
representative capacity, such persons should so indicate when signing, and,
unless waived by the Company, proper evidence satisfactory to the Company of
their authority to so act must be submitted.

                  ENDORSEMENTS ON CERTIFICATES FOR PRIVATE NOTES OR SIGNATURES
ON BOND POWERS REQUIRED BY THIS INSTRUCTION 3 MUST BE GUARANTEED BY A FIRM WHICH
IS A MEMBER OF A REGISTERED NATIONAL SECURITIES EXCHANGE OR A MEMBER OF THE
NATIONAL ASSOCIATION OF SECURITIES DEALERS, INC. OR BY A COMMERCIAL BANK OR
TRUST COMPANY HAVING AN OFFICE OR CORRESPONDENT IN THE UNITED STATES (AN
"ELIGIBLE INSTITUTION").

                  SIGNATURES ON THIS LETTER OF TRANSMITTAL NEED NOT BE
GUARANTEED BY AN ELIGIBLE INSTITUTION, PROVIDED THE PRIVATE NOTES ARE TENDERED:
(I) BY A REGISTERED HOLDER OF PRIVATE NOTES (WHICH TERM, FOR PURPOSES OF THE
EXCHANGE OFFER, INCLUDES ANY PARTICIPANT IN THE BOOK-ENTRY TRANSFER FACILITY
SYSTEM WHOSE NAME APPEARS ON A SECURITY POSITION LISTING AS THE HOLDERS OF SUCH
PRIVATE NOTES) WHO HAS NOT COMPLETED THE BOX ENTITLED "SPECIAL ISSUANCE
INSTRUCTIONS" OR "SPECIAL DELIVERY INSTRUCTIONS" ON THIS LETTER OF TRANSMITTAL
OR (II) FOR THE ACCOUNT OF AN ELIGIBLE INSTITUTION.

4.                SPECIAL ISSUANCE AND DELIVERY INSTRUCTIONS.

                  Tendering holders of Private Notes should indicate in the
applicable box the name and address to which Exchange Notes issued pursuant to
the Exchange Offer and/or substitute certificates evidencing Private Notes not
exchanged are to be issued or sent, if different from the name or address of the
person signing this Letter of Transmittal. In the case of issuance in a
different name, the employer identification or social security number of the
person named must also be indicated. A holder of Private Notes tendering Private
Notes by book-entry transfer may request that Private Notes not exchanged be
credited to such account maintained at the Book-Entry Transfer Facility as such
holder may designate hereon. If no such instructions are given, such Private
Notes not exchanged will be returned to the name or address of the person
signing this Letter of Transmittal.

5.       TAX IDENTIFICATION NUMBER.

                  Federal income tax law generally requires that a tendering
holder whose Private Notes are accepted for exchange must provide the Company
(as payor) with such holder's correct Taxpayer Identification Number ("TIN") on
Substitute Form W-9 below, which, in the case of a tendering holder who is an
individual, is his or her social security number. If the Company is not provided
with the current TIN or an adequate basis for an exemption, such tendering
holder may be subject to a $50 penalty imposed by the Internal Revenue Service.
In addition, delivery to such tendering holder of Exchange Notes may be subject
to backup withholding in an amount equal to 31% of all reportable payments made
after the exchange. If withholding results in an overpayment of taxes, a refund
may be obtained.

                  Exempt holders of Private Notes (including, among others, all
corporations and certain foreign individuals) are not subject to these backup
withholding and reporting requirements. See the enclosed Guidelines of
Certification of Taxpayer Identification Number on Substitute Form W-9 (the "W-9
Guidelines") for additional instructions.

                  To prevent backup withholding, each tendering holder of
Private Notes must provide its correct TIN by completing the Substitute Form W-9
set forth below, certifying that the TIN provided is correct (or that such
holder is awaiting a TIN) and that (i) the holder is exempt from backup
withholding, (ii) the holder has not been notified by the Internal Revenue
Service that such holder is subject to backup withholding as a result of a
failure to report all interest or dividends or (iii) the Internal Revenue
Service has notified the holder that such holder is no longer subject to backup
withholding. If the tendering holder of Private Notes is a nonresident alien or
foreign entity not subject to backup withholding, such holder must give the
Company a completed Form W-8, Certificate of Foreign Status. These forms may be
obtained from the Exchange Agent. If the Private Notes are in more than one name
or are not in the name of the actual owner, such holder should consult the W-9
Guidelines for information on which TIN to report. If such holder does not have
a TIN, such holder should consult the W-9 Guidelines for instructions on
applying for a TIN, check the box in Part 2 of the Substitute Form W-9 and write
"applied for" on the form in lieu of its TIN. Note: Checking this box and
writing "applied for" on the form means that such holder has already applied for
a TIN or that such holder intends to apply for one in the near future. If such
holder does not provide its TIN to the Company within 60 days, backup
withholding will begin and continue until such holder furnishes its TIN to the
Company.

                                       7


<PAGE>   8

6.       TRANSFER TAXES.

                  The Company will pay all transfer taxes, if any, applicable to
the transfer of Private Notes to it or its order pursuant to the Exchange Offer.
If, however, Exchange Notes and/or substitute Private Notes not exchanged are to
be delivered to, or are to be registered or issued in the name of, any person
other than the registered holder of the Private Notes tendered hereby, or if
tendered Private Notes are registered in the name of any person other than the
person signing this Letter of Transmittal, or if a transfer tax is imposed for
any reason other than the transfer of Private Notes to the Company or its order
pursuant to the Exchange Offer, the amount of any such transfer taxes (whether
imposed on the registered holder or any other persons) will be payable by the
tendering holder. If satisfactory evidence of payment of such taxes or exemption
therefrom is not submitted herewith, the amount of such transfer taxes will be
billed directly to such tendering holder.

                  EXCEPT AS PROVIDED IN THIS INSTRUCTION 6, IT WILL NOT BE
NECESSARY FOR TRANSFER TAX STAMPS TO BE AFFIXED TO THE PRIVATE NOTES SPECIFIED
IN THIS LETTER OF TRANSMITTAL.

7.                DETERMINATION OF VALIDITY.

                  The Company will determine, in its sole discretion, all
questions as to the form of documents, validity, eligibility (including time of
receipt) and acceptance for exchange of any tender of Private Notes, which
determination shall be final and binding on all parties. The Company reserves
the absolute right to reject any and all tenders determined by it not to be in
proper form or the acceptance of which, or exchange for which, may, in the view
of counsel to the Company, be unlawful. The Company also reserves the absolute
right, subject to applicable law, to waive any of the conditions of the Exchange
Offer set forth in the Prospectus under the caption "The Exchange Offer" or any
conditions or irregularity in any tender of Private Notes of any particular
holder whether or not similar conditions or irregularities are waived in the
case of other holders.

                  The Company's interpretation of the terms and conditions of
the Exchange Offer (including this Letter of Transmittal and the instructions
hereto) will be final and binding. No tender of Private Notes will be deemed to
have been validly made until all irregularities with respect to such tender have
been cured or waived. Although the Company intends to notify holders of defects
or irregularities with respect to tenders of Private Notes, neither the Company,
any employees, agents, affiliates or assigns of the Company, the Exchange Agent,
nor any other person shall be under any duty to give notification of any
irregularities in tenders or incur any liability for failure to give such
notification.

8.                NO CONDITIONAL TENDERS.

                  No alternative, conditional, irregular or contingent tenders
will be accepted. All tendering holders of Private Notes, by execution of this
Letter of Transmittal, shall waive any right to receive notice of the acceptance
of their Private Notes for exchange.

9.                MUTILATED, LOST, STOLEN OR DESTROYED PRIVATE NOTES.

                  Any holder whose Private Notes have been mutilated, lost,
stolen or destroyed should contact the Exchange Agent at the address indicated
above for further instructions.

10.               REQUESTS FOR ASSISTANCE OR ADDITIONAL COPIES.

                  Questions relating to the procedure for tendering, as well as
requests for additional copies of the Prospectus and this Letter of Transmittal,
may be directed to the Exchange Agent, at the address and telephone number
indicated above.

                                       8

<PAGE>   9

<TABLE>
<CAPTION>


                                             TO BE COMPLETED BY ALL TENDERING HOLDERS
                                                                 
                                                        (SEE INSTRUCTION 5)
                                                                 
                                                PAYOR'S NAME: THE BANK OF NEW YORK
====================================================================================================================================
<S>                <C>                     <C>    
SUBSTITUTE
FORM W-9
DEPARTMENT OF THE TREASURY
INTERNAL REVENUE SERVICE

PAYOR'S REQUEST FOR
TAXPAYER
IDENTIFICATION NUMBER                                                                     TIN:____________________________
("TIN") AND                               PART 1-PLEASE PROVIDE YOUR TIN IN THE BOX AT          SOCIAL SECURITY NUMBER OR
CERTIFICATION                             RIGHT AND CERTIFY BY SIGNING AND DATING BELOW      EMPLOYER IDENTIFICATION NUMBER
                                          ==========================================================================================
                                          PART 2--TIN APPLIED FOR [   ]
                                          ==========================================================================================
                                          CERTIFICATION:  UNDER THE PENALTIES OF PERJURY, I CERTIFY THAT:

                                          (1)      the number shown on this form
                                                   is my correct Taxpayer
                                                   Identification Number (or I
                                                   am waiting for a number to be
                                                   issued to me).

                                          (2)      I am not subject to backup
                                                   withholding either because:
                                                   (a) I am exempt from backup
                                                   withholding, or (b) I have
                                                   not been notified by the
                                                   Internal Revenue Service (the
                                                   "IRS") that I am subject to
                                                   backup withholding as a
                                                   result of a failure to report
                                                   all interest or dividends, or
                                                   (c) the IRS has notified me
                                                   that I am no longer subject
                                                   to backup withholding, and

                                          (3)      any other information provided on
                                                   this form is true and correct.

                                          SIGNATURE____________________________________   DATE___________
====================================================================================================================================
You must  cross  out item (2) of the  above  certification  if you have  been  notified  by the IRS that you are  subject  to backup
withholding because of underreporting of interest or dividends on your tax
return and you have not been notified by the IRS that you are no longer subject
to backup withholding.
====================================================================================================================================


                                YOU MUST COMPLETE THE FOLLOWING CERTIFICATE IF YOU CHECKED THE BOX
                                                 IN PART 2 OF SUBSTITUTE FORM W-9

====================================================================================================================================
                                      CERTIFICATE OF AWAITING TAXPAYER IDENTIFICATION NUMBER

I certify under penalties of perjury that a taxpayer identification number has
not been issued to me, and either (a) I have mailed or delivered an application
to receive a taxpayer identification number to the appropriate Internal Revenue
Service Center or Social Security Administration Office or (b) I intend to mail
or deliver an application in the near future. I understand that if I do not
provide a taxpayer identification number by the time of the exchange, 31 percent
of all reportable payments made to me thereafter will be withheld until I
provide a number.

- ---------------------------------------------     ---------------------
              SIGNATURE                           DATE
====================================================================================================================================
</TABLE>


                                       9

<PAGE>   1

                                                                   EXHIBIT 99.2

                        NOTICE OF GUARANTEED DELIVERY FOR
                     TENDER OF 12 1/2% SENIOR DISCOUNT NOTES
                         DUE 2008 OF DTI HOLDINGS, INC.

                  This form or one substantially equivalent hereto or an Agent's
message relating to the guaranteed delivery procedures must be used to accept
the Exchange Offer of DTI Holdings, Inc., a Missouri corporation (the
"Company"), made pursuant to the Prospectus, dated ______, 1998 (the
"Prospectus"), if certificates for the outstanding 12 1/2% Senior Discount Notes
due 2008 of the Company (the "Private Notes") are not immediately available or
if the procedure for book-entry transfer cannot be completed on a timely basis
or time will not permit all required documents to reach The Bank of New York
(the "Exchange Agent") on or prior to 5:00 p.m., New York City time, on the
Expiration Date of the Exchange Offer. This Notice of Guaranteed Delivery may be
delivered or transmitted by telegram, telex, facsimile transmission, mail or
hand delivery to the Exchange Agent as set forth below. See "The Exchange
Offer -- Procedures for Tendering" in the Prospectus. In addition, in order to
utilize the guaranteed delivery procedure to tender Private Notes pursuant to
the Exchange Offer, a completed, signed and dated Letter of Transmittal (or a
manually signed facsimile thereof) must also be received by the Exchange Agent
on or prior to 5:00 p.m., New York City time, on the Expiration Date.
Capitalized terms used herein but not defined herein have the respective
meanings given to them in the Prospectus.

                                  Delivery To:

                      THE BANK OF NEW YORK, Exchange Agent
<TABLE>
<CAPTION>
<S>                                     <C>                                              <C>                             

        By Mail                           By Overnight Courier or Hand:
        The Bank of New York              The Bank of New York                             By Facsimile:
        One Wall Street - 27              One Wall Street - 27                            (212) 571-3080
        New York, New York  10286         Corporate Trust & Agency Services Window
        Attention: Reorganization         New York, New York  10286                       Confirm by Telephone
        Section                           Attention: Reorganization Section               (212) 815-2742

</TABLE>


                  DELIVERY OF THIS NOTICE OF GUARANTEED DELIVERY TO AN ADDRESS
OTHER THAN AS SET FORTH ABOVE OR TRANSMISSION OF THIS NOTICE OF GUARANTEED
DELIVERY VIA FACSIMILE OTHER THEN AS SET FORTH ABOVE WILL NOT CONSTITUTE A VALID
DELIVERY.

                  THIS NOTICE OF GUARANTEED DELIVERY IS NOT TO BE USED TO
GUARANTEE SIGNATURES. IF A SIGNATURE ON A LETTER OF TRANSMITTAL IS REQUIRED TO
BE GUARANTEED BY AN "ELIGIBLE INSTITUTION" UNDER THE INSTRUCTIONS THERETO, SUCH
SIGNATURE GUARANTEE MUST APPEAR IN THE APPLICABLE SPACE PROVIDED IN THE
SIGNATURE BOX ON THE LETTER OF TRANSMITTAL.

         Ladies and Gentlemen:

                  Upon the terms and conditions set forth in the Prospectus and
the related Letter of Transmittal, the undersigned hereby tenders to the Company
the principal amount of Private Notes set forth below, pursuant to the
guaranteed delivery procedures described in the Prospectus under the caption
"The Exchange Offer-Guaranteed Delivery Procedures."
<TABLE>

<S>                                               <C>
Principal Amount of Private Notes Tendered:*

$ _________________________________________

Certificate Nos. (if available)                   If Private Notes will be delivered by book-entry
                                                  transfer to The Depository Trust Company, provide
___________________________________________       account number.
Total Principal Amount Represented by
Private Notes Certificate(s):

$__________________________________________       Account Number___________________________

___________
*Must be in denominations of principal amount of $1,000 and any integral multiple thereof
</TABLE>


<PAGE>   2


- --------------------------------------------------------------------------------
         AN AUTHORITY HEREIN CONFERRED OR AGREED TO BE CONFERRED SHALL SURVIVE
THE DEATH OR INCAPACITY OF THE UNDERSIGNED, AND EVERY OBLIGATION OF THE
UNDERSIGNED HEREUNDER SHALL BE BINDING UPON THE HEIRS, PERSONAL REPRESENTATIVES,
SUCCESSORS AND ASSIGNS OF THE UNDERSIGNED.
- --------------------------------------------------------------------------------

                                PLEASE SIGN HERE

X____________________________________             ___________________________

X____________________________________             ___________________________ 
         Signature(s) of Owner(s)                            Date
         or Authorized Signatory            

         Area Code and Telephone Number:_____________________________________

         Must be signed by the holder(s) of Private Notes as their name(s)
appear(s) on certificates for Private Notes or on a security position listing,
or by person(s) authorized to become registered holder(s) by endorsement and
documents transmitted with this Notice of Guaranteed Delivery. If signature is
by trustee, executor, administrator, guardian, attorney-in-fact, officer or
other person acting in a fiduciary or representative capacity, such person must
set forth his or her full title below.

                      PLEASE PRINT NAME(S) AND ADDRESS(ES)
Name(s):_________________________________________________________________
        _________________________________________________________________
        _________________________________________________________________

Capacity:________________________________________________________________
Address(es):_____________________________________________________________

                                    GUARANTEE

         The undersigned, a member of a registered national securities exchange,
or a member of the National Association of Securities Dealers, Inc., or a
commercial bank or trust company having an office or correspondent in the United
States, hereby guarantees that the certificates representing the principal
amount of Private Notes tendered hereby in proper form for transfer, or timely
confirmation of the book-entry transfer of such Private Notes into the Exchange
Agent's account at The Depository Trust Company pursuant to the procedures set
forth in "The Exchange Offer -- Guaranteed Delivery Procedures" section of the
Prospectus, together with one or more properly completed and duly executed
Letter(s) of Transmittal (or a manually signed facsimile thereof) or an Agent's
message with any required signature guarantee and any other documents required
by the Letter of Transmittal, will be received by the Exchange Agent at the
address set forth above, no later than five New York Stock Exchange trading days
after the date of execution hereof.


________________________                     ________________________________
 Name of Firm                                     Authorized Signature

________________________                     ________________________________

 Address                                               Title

 _______________________                   Name:_____________________________
 Zip Code                                       (Please Type or Print)

Area Code and Tel. No.__________________   Dated:____________________________

NOTE:    DO NOT SEND CERTIFICATES FOR PRIVATE NOTES WITH THIS NOTICE OF
         GARANTEED DELIVERY.  ACTUAL SURRENDER OF PRIVATE NOTES MUST BE MADE 
         PURSUANT TO, AND BE ACCOMPANIED BY, A PROPERLY COMPLETED AND DULY 
         EXECUTED LETTER OF TRANSMITTAL AND ANY OTHER REQUIRED DOCUMENTS.


<PAGE>   1

                                                                    EXHIBIT 99.3

                               DTI HOLDINGS, INC.

             OFFER TO EXCHANGE ITS 12 1/2% SERIES B SENIOR DISCOUNT
               NOTES DUE MARCH 1, 2008 FOR ALL OF ITS OUTSTANDING
                 12 1/2% SENIOR DISCOUNT NOTES DUE MARCH 1, 2008

To:  Brokers, Dealers, Commercial Banks
     Trust Companies and Other Nominees:

                  DTI HOLDINGS, Inc., a Missouri corporation (the "Company"), is
offering, upon and subject to the terms and conditions set forth in the
Prospectus, dated ______________, 1998 (the "Prospectus"), and the enclosed
Letter of Transmittal (the "Letter of Transmittal"), to exchange (the "Exchange
Offer") its 12 1/2% Series B Senior Discount Notes due March 1, 2008 (the
"Exchange Notes"), which have been registered under the Securities Act of 1933,
as amended, for any and all of its outstanding 12 1/2% Senior Discount Notes due
March 1, 2008 (the "Private Notes" and, together with the Exchange Notes, the
"Notes"). The Exchange Offer is being made in order to satisfy certain
obligations of the Company contained in the Notes Registration Rights Agreement
dated February 23, 1998, between the Company and the Initial Purchasers of the
Private Notes referred to therein.

                  We are requesting that you contact your clients for whom you
hold Private Notes regarding the Exchange Offer. For your information and for
forwarding to your clients for whom you hold Private Notes registered in your
name or in the name of your nominee, or who hold Private Notes registered in
their own names, we are enclosing the following documents:


                   1.  The Prospectus;

                   2. The Letter of Transmittal for your use and for the
                      information of your clients;

                   3. A Notice of Guaranteed Delivery to be used to accept the
                      Exchange Offer if certificates for Private Notes are not
                      immediately available or time will not permit all required
                      documents to reach the Exchange Agent prior to the
                      Expiration Date (as defined below) or if the procedure for
                      book-entry transfer cannot be completed on a timely basis;


                   4. A form of letter which may be sent to your clients for
                      whose account you hold Private Notes registered in your
                      name or the name of your nominee, with space provided for
                      obtaining such clients' instructions with regard to the
                      Exchange Offer;


                   5.  Guidelines for Certification of Taxpayer Identification 
                       Number on Substitute Form W-9; and


                   6. Return envelopes addressed to the Bank of New York the
                      Exchange Agent for the Private Notes.




<PAGE>   2

Brokers, Dealers, Commercial Banks
Trust Companies and Other Nominees:
____________________,1998
Page 2

                  YOUR PROMPT ACTION IS REQUESTED. THE EXCHANGE OFFER WILL
EXPIRE AT 5:00 P.M., NEW YORK CITY TIME, ON ___________________, 1998, UNLESS
EXTENDED BY THE COMPANY (THE "EXPIRATION DATE"). PRIVATE NOTES TENDERED PURSUANT
TO THE EXCHANGE OFFER MAY BE WITHDRAWN AT ANY TIME BEFORE THE EXPIRATION DATE.

                  To participate in the Exchange Offer, a duly executed and
properly completed Letter of Transmittal ( or facsimile thereof), with any
required signature guarantees and any other required documents, should be sent
to the Exchange Agent, all in accordance with the instructions set forth in the
Letter of Transmittal and the Prospectus.

                  If holders of Private Notes wish to tender, but it is
impracticable for them to forward their certificates for Private Notes prior to
the expiration of the Exchange Offer or to comply with the book-entry transfer
procedures on a timely basis, a tender may be effected by following the
guaranteed delivery procedures described in the Prospectus under "The Exchange
Offer--Guaranteed Delivery Procedures."

                  The Company will not pay any fees or commissions to brokers,
dealers or other persons for soliciting exchanges of Notes pursuant to the
Exchange Offer. The Company will, however, upon request, reimburse brokers,
dealers, commercial banks and trust companies for reasonable and necessary costs
and expenses incurred by them in forwarding the Prospectus and the related
documents to the beneficial owners of Private Notes held by them as nominee or
in a fiduciary capacity. The Company will pay or cause to be paid all stock
transfer taxes applicable to the exchange of Private Notes pursuant to the
Exchange Offer, except as set forth in Instruction 6 of the Letter of
Transmittal.

                  Any inquiries you may have with respect to the Exchange Offer,
or requests for additional copies of the enclosed materials, should be directed
to the Bank of New York, as Exchange Agent, at its address and telephone number
set forth on the front of the Letter of Transmittal.



                                                     Very truly yours,



                                                     DTI HOLDINGS, INC.

                  NOTHING HEREIN OR IN THE ENCLOSED DOCUMENTS SHALL CONSTITUTE
YOU OR ANY PERSON AS AN AGENT OF THE COMPANY OR THE EXCHANGE AGENT, OR AUTHORIZE
YOU OR ANY OTHER PERSON TO USE ANY DOCUMENT OR MAKE ANY STATEMENTS ON BEHALF OF
EITHER OF THEM WITH RESPECT TO THE EXCHANGE OFFER, EXCEPT FOR STATEMENTS
EXPRESSLY MADE IN THE PROSPECTUS OR THE LETTER OF TRANSMITTAL.



Enclosures


<PAGE>   1
                                           
                                                                   EXHIBIT 99.4


                               DTI HOLDINGS, INC.


                  OFFER TO EXCHANGE ITS 12 1/2% SERIES B SENIOR
               DISCOUNT NOTES DUE 2008 FOR ALL OF ITS OUTSTANDING
                     12 1/2% SENIOR DISCOUNT NOTES DUE 2008


To Our Clients:


                  Enclosed for your consideration is a Prospectus, dated
________________, 1998 (the "Prospectus"), and the associated Letter of
Transmittal (the "Letter of Transmittal"), relating to the offer (the "Exchange
Offer") of DTI Holdings, Inc., a Missouri corporation (the "Company"), to
exchange its 12 1/2% Series B Senior Discount Notes due 2008, which have been
registered under the Securities Act of 1933, as amended (the "Exchange Notes"),
for any and all of its outstanding 12 1/2% Senior Discount Notes due 2008 (the
"Private Notes"), upon the terms and subject to the conditions described in the
Prospectus and the Letter of Transmittal. The Exchange Offer is being made in
order to satisfy certain obligations of the Company contained in the Notes
Registration Rights Agreement dated February 23, 1998, by and among the Company
and the Initial Purchasers of the Private Notes referred to herein.

                  This material is being forwarded to you as the beneficial
owner of the Private Notes carried by us in your account but not registered in
your name. A TENDER OF SUCH PRIVATE NOTES MAY ONLY BE MADE BY US AS THE HOLDER
OF RECORD AND PURSUANT TO YOUR INSTRUCTIONS.

                  Accordingly, we request instructions as to whether you wish us
to tender on your behalf the Private Notes held by us for your account, pursuant
to the terms and conditions set forth in the enclosed Prospectus and Letter of
Transmittal.

                  Your instructions should be forwarded to us as promptly as
possible in order to permit us to tender the Private Notes on your behalf in
accordance with the provisions of the Exchange Offer. THE EXCHANGE OFFER WILL
EXPIRE AT 5:00 P.M., NEW YORK CITY TIME, ON __________________, 1998, UNLESS
EXTENDED BY THE COMPANY (THE "EXPIRATION DATE"). ANY PRIVATE NOTES TENDERED
PURSUANT TO THE EXCHANGE OFFER MAY BE WITHDRAWN AT ANY TIME BEFORE THE
EXPIRATION DATE.


<PAGE>   2



                   Your attention is directed to the following:


                   1. The Exchange Offer is for any and all Private Notes.


                   2. Any transfer taxes incident to the exchange of Private
                      Notes pursuant to the Exchange Offer will be paid by the
                      Company.


                   3. The Exchange Offer expires at 5:00 p.m., New York City
                      time, on ______________, 1998, unless extended by the
                      Company.


                   If you wish to have us tender your Private  Notes,  please so
instruct us by completing,  executing and returning to us the  instruction  form
enclosed  herein.  THE LETTER OF TRANSMITTAL IS FURNISHED TO YOU FOR INFORMATION
ONLY AND MAY NOT BE USED BY YOU TO TENDER PRIVATE NOTES.

 


                                        2
<PAGE>   3


                          INSTRUCTIONS WITH RESPECT TO
                               THE EXCHANGE OFFER

                  The undersigned acknowledge(s) receipt of your letter and the
enclosed material referred to therein relating to the Exchange Offer made by DTI
Holdings, Inc. with respect to its Private Notes.

                  This will instruct you to tender the Private Notes held by you
for the account of the undersigned, upon and subject to the terms and conditions
set forth in the Prospectus and the related Letter of Transmittal.

                  Please tender the Private Notes held by you for my/our account
as indicated below:

12 1/2% Senior Discount Notes due 2008.........       Aggregate Principal Amount
                                                          of Private Notes

/ / Please do not tender any Private                           -----------------
    Notes held by you for my account.

Dated:  ____________, 1998                        ------------------------------
                                                              Signature (s)


                                                  ------------------------------

                                                  ------------------------------

                                                  ------------------------------
                                                       Please print name(s) here


                                                  ------------------------------

                                                  ------------------------------
                                                                Address(es)

                                                  ------------------------------
                                                  Area Code and Telephone Number

                                                  ------------------------------
                                                          Tax Identification or
                                                          Social Security No.(s)

                  NONE OF THE PRIVATE NOTES HELD BY US FOR YOUR ACCOUNT WILL BE
TENDERED UNLESS WE RECEIVE WRITTEN INSTRUCTIONS FROM YOU TO DO SO. UNLESS A
SPECIFIC CONTRARY INSTRUCTION IS GIVEN IN THE SPACE PROVIDED, YOUR SIGNATURE(S)
HEREON SHALL CONSTITUTE AN INSTRUCTION TO US TO TENDER ALL THE PRIVATE NOTES
HELD BY US FOR YOUR ACCOUNT.

                                       3

<PAGE>   1



                                                                    EXHIBIT 99.6


                            ___________________, 1998


                            EXCHANGE AGENT AGREEMENT


The Bank of New York
Corporate Trust Trustee Administration
101 Barclay Street - 21st Floor
New York, New York 10286

Ladies and Gentlemen:

         DTI Holdings, Inc., a Missouri corporation (the "Company"), proposes to
make an offer (the "Exchange Offer") to exchange up to $506,000,000 aggregate
principal amount at maturity of its 12 1/2% Series B Senior Discount Notes due
March 1, 2008 (the "Exchange Notes"), for a like principal amount of its
outstanding 12 1/2% Senior Discount Notes due March 1, 2008 (the "Private
Notes"). The terms and conditions of the Exchange Offer are set forth in a
prospectus (the "Prospectus") included in the Company's registration statement
on Form S-4 (File No. 333-_________), as amended (the "Registration Statement"),
filed with the Securities and Exchange Commission (the "SEC"), proposed to be
distributed to all record holders of the Private Notes. The Private Notes and
the Exchange Notes are collectively referred to herein as the "Notes."
Capitalized terms used and not defined herein shall have the respective meanings
ascribed to them in the Prospectus.

         The Company hereby appoints The Bank of New York to act as exchange
agent (the "Exchange Agent") in connection with the Exchange Offer. References
hereinafter to "you" shall refer to The Bank of New York.

         The Exchange Offer is expected to be commenced by the Company on or
about _______________, 1998. The Letter of Transmittal accompanying the
Prospectus is to be used by the holders of the Private Notes to accept the
Exchange Offer and contains instructions with respect to the delivery of
certificates for Private Notes tendered.

         The Exchange Offer shall expire at 5:00 P.M., New York City time,
on ________ , 1998, or on such later date or time to which the Company may
extend the Exchange Offer (the "Expiration Date"). Subject to the terms and
conditions set forth in the Prospectus, the Company expressly reserves the
right to extend the Exchange Offer from time to time and may extend the
Exchange Offer by giving oral (confirmed in writing) or written notice to you
before 9:00 A.M., New York City time, on the business day theretofore scheduled
as the Expiration Date.

 

                                      1
<PAGE>   2


         The Company expressly reserves the right, in its sole discretion, to
amend or terminate the Exchange Offer, and not to accept for exchange any
Private Notes not theretofore accepted for exchange. The Company will give oral
(confirmed in writing) or written notice of any amendment, termination or
nonacceptance to you as promptly as practicable.

         In carrying out your duties as Exchange Agent, you are to act in
accordance with the following instructions:

         1. You will perform such duties and only such duties as are
specifically set forth in the section of the Prospectus captioned "The Exchange
Offer" or as specifically set forth herein; provided, however, that in no way
will your general duty to act in good faith and without gross negligence or
willful misconduct be limited by the foregoing.

         2. You will establish an account with respect to the Private Notes at
The Depository Trust Company (the "Book-Entry Transfer Facility") for purposes
of the Exchange Offer within two business days after the date of the Prospectus,
and any financial institution that is a participant in the Book-Entry Transfer
Facility's systems may make book-entry delivery of the Private Notes by causing
the Book-Entry Transfer Facility to transfer such Private Notes into your
account in accordance with the Book-Entry Transfer Facility's procedures for
such transfer.

         3. You are to examine each of the Letters of Transmittal and
certificates for Private Notes (and confirmation of book-entry transfers of
Private Notes into your account at the Book-Entry Transfer Facility) and any
other documents delivered or mailed to you by or for holders of the Private
Notes, to ascertain whether: (i) the Letters of Transmittal, certificates and
any such other documents are duly executed and properly completed in accordance
with instructions set forth therein and that such book-entry confirmations are
in due and proper form and contain the information required to be set forth
therein, and (ii) the Private Notes have otherwise been properly tendered. In
each case where the Letter of Transmittal or any other document has been
improperly completed or executed, or where book-entry confirmations are not in
due and proper form or omit certain information, or any of the certificates for
Private Notes are not in proper form for transfer or some other irregularity in
connection with the acceptance of the Exchange Offer exists, you will endeavor
to inform the presenters of the need for fulfillment of all requirements and to
take any other action as may be necessary or advisable to cause such
irregularity to be corrected.

         4. With the approval of the President and Chief Executive Officer (such
approval, if given orally, to be confirmed in writing) or any other party
designated by such officer in writing, you are authorized to waive any
irregularities in connection with any tender of Private Notes pursuant to the
Exchange Offer.

         5. Tenders of Private Notes may be made only as set forth in the Letter
of Transmittal and in the section of the Prospectus captioned "The Exchange
Offer-Procedures for Tendering," and Private Notes shall be considered properly
tendered to you only when tendered in accordance with the procedures set forth
therein. Notwithstanding the provisions of this paragraph 5, Private Notes which
the President and Chief Executive Officer or any other 


                                       2

<PAGE>   3
designated officer of the Company shall approve as having been properly
tendered shall be considered to be properly tendered (such approval, if given
orally, shall be confirmed in writing).                                  

         6. You shall advise the Company with respect to any Private Notes
received subsequent to the Expiration Date and accept its instructions with
respect to disposition of such Private Notes.

         7. You shall accept tenders:

                   (a)      in cases where the Private Notes are registered in 
two or more names only if signed by all named holders;

                   (b) in cases where the signing person (as indicated on the
Letter of Transmittal) is acting in a fiduciary or a representative capacity
only when proper evidence of his or her authority so to act is submitted; and

                   (c) from persons other than the registered holder of Private
Notes provided that customary transfer requirements, including any applicable
transfer taxes, are fulfilled.

         You shall accept partial tenders of Private Notes when so indicated and
as permitted in the Letter of Transmittal and deliver certificates for Private
Notes to the transfer agent for split-up and return any untendered Private Notes
to the holder (or such other person as may be designated in the Letter of
Transmittal) as promptly as practicable after expiration or termination of the
Exchange Offer.

         8. Upon satisfaction or waiver of all of the conditions to the Exchange
Offer, the Company will notify you (such notice if given orally, to be confirmed
in writing) of its acceptance, promptly after the Expiration Date, of all
Private Notes properly tendered and you, on behalf of the Company, will exchange
such Private Notes for Exchange Notes and cause such Private Notes to be
canceled. Delivery of Exchange Notes will be made on behalf of the Company by
you at the rate of $1,000 principal amount at maturity of Exchange Notes for
each $1,000 principal amount at maturity of the Private Notes tendered promptly
after notice (such notice if given orally, to be confirmed in writing) of
acceptance of said Private Notes by the Company; provided, however, that in all
cases, Private Notes tendered pursuant to the Exchange Offer will be exchanged
only after timely receipt by you of certificates for such Private Notes (or
confirmation of book-entry transfer into your account at the Book-Entry Transfer
Facility), a properly completed and, except as described in the section of the
Prospectus captioned "The Exchange Offer - Procedures for Tendering," duly
executed Letter of Transmittal (or facsimile thereof) with any required
signature guarantees and any other required documents. Unless otherwise
instructed by the Company, you shall issue Exchange Notes only in denominations
of $1,000 principal amount at maturity or any integral multiple thereof.

         9. Tenders pursuant to the Exchange Offer are irrevocable, except that,
subject to the terms and upon the conditions set forth in the Prospectus and the
Letter of Transmittal, Private 

                                       3
<PAGE>   4

Notes tendered pursuant to the Exchange Offer may be withdrawn at any time on 
or prior to the Expiration Date in accordance with the terms of the Exchange 
Offer.

         10. The Company shall not be required to exchange any Private Notes
tendered if any of the conditions set forth in the Exchange Offer are not met.
Notice of any decision by the Company not to exchange any Private Notes tendered
shall be given (and confirmed in writing) by the Company to you.

         11. If, pursuant to the Exchange Offer, the Company does not accept for
exchange all or part of the Private Notes tendered because of an invalid tender,
the occurrence of certain other events set forth in the Prospectus or otherwise,
you shall as soon as practicable after the expiration or termination of the
Exchange Offer return those certificates for unaccepted Private Notes (or effect
appropriate book-entry transfer), together with any related required documents
and the Letters of Transmittal relating thereto that are in your possession, to
the persons who deposited them (or effected such book-entry transfer).

         12. All certificates for reissued Private Notes, unaccepted Private
Notes or for Exchange Notes (other than those effected by book-entry transfer)
shall be forwarded by (a) first-class certified mail, return receipt requested,
under a blanket surety bond obtained by you protecting you and the Company from
loss or liability arising out of the nonreceipt or nondelivery of such
certificates or (b) by registered mail insured by you separately for the
replacement value of each of such certificates.

         13. You are not authorized to pay or offer to pay any concessions,
commissions or other solicitation fees to any broker, dealer, commercial bank,
trust company or other nominee or to engage or use any person to solicit
tenders.

         14.      As Exchange Agent hereunder, you:

                   (a) shall have no duties or obligations other than those
specifically set forth in the Prospectus, the Letter of Transmittal or herein or
as may be subsequently agreed to in writing by you and the Company;

                   (b) will be regarded as making no representations and having
no responsibilities as to the validity, sufficiency, value or genuineness of any
of the certificates for the Private Notes deposited with you pursuant to the
Exchange Offer, and will not be required to and will make no representation as
to the validity, value or genuineness of the Exchange Offer;

                   (c) shall not be obligated to take any legal action hereunder
which might in your reasonable judgment involve any expense or liability, unless
you shall have been furnished with reasonable indemnity;

                   (d) may reasonably rely on and shall be protected in acting
in reliance upon any certificate, instrument, opinion, notice, letter, telegram
or other document or security 


                                       4

<PAGE>   5

delivered to you and reasonably believed by you to be genuine and to have been 
signed by the proper party or parties;


                   (e) may reasonably act upon any tender, statement, request,
comment, agreement or other instrument whatsoever not only as to its due
execution and validity and effectiveness of its provisions, but also as to the
truth and accuracy of any information contained therein, which you shall in good
faith believe to be genuine or to have been signed or represented by a proper
person or persons;

                   (f) may rely on and shall be protected in acting upon written
or oral instructions from any officer of the Company;

                   (g) may consult with your counsel with respect to any
questions relating to your duties and responsibilities, and the written opinion
of such counsel shall be full and complete authorization and protection in
respect of any action taken, suffered or omitted to be taken by you hereunder in
good faith and in accordance with the written opinion of such counsel; and

                   (h) shall not advise any person tendering Private Notes
pursuant to the Exchange Offer as to whether to tender or refrain from tendering
all or any portion of Private Notes or as to the market value of the Private
Notes or as to any decrease or appreciation in market value of any Private Notes
that may or may not occur as a result of the Exchange Offer or as to the market
value of the Exchange Notes; provided, however, that in no way will your general
duty to act in good faith and without gross negligence or willful misconduct be
limited by the foregoing.

         15. You shall take such action as may from time to time be requested by
the Company or its counsel (and such other action as you may reasonably deem
appropriate) to furnish copies of the Prospectus, Letter of Transmittal and the
Notice of Guaranteed Delivery or such other forms as may be approved from time
to time by the Company, to all persons requesting such documents and to accept
and comply with telephone requests for information relating to the Exchange
Offer, provided such information shall relate only to the procedures for
accepting (or withdrawing from) the Exchange Offer. The Company will furnish you
with copies of such documents at your request.

         16. You shall advise by facsimile transmission or telephone, and
promptly thereafter confirm in writing to, Richard D. Weinstein, President and
Chief Executive Officer of the Company, and such other person or persons as the
Company may request, daily (and more frequently during the week immediately
preceding the Expiration Date and if otherwise requested) up to and including
the Expiration Date, as to the aggregate principal amount of Private Notes which
have been duly tendered pursuant to the Exchange Offer and the items received by
you pursuant to the Exchange Offer and this Agreement, separately reporting and
giving cumulative totals as to items properly received and items improperly
received. In addition, you will also inform, and cooperate in making available
to, the Company or any such other person or persons upon oral request made from
time to time prior to the Expiration Date of

 
                                      5
<PAGE>   6

such other  information as it or he or  she  reasonably requests.  Such
cooperation shall include,  without limitation,  the  granting  by you to the
Company and such person as the Company may request of access to those persons on
your staff who are responsible for receiving tenders, in order to ensure that
immediately prior to the Expiration  Date the Company shall have received
information in sufficient detail to enable it to decide  whether to extend the
Exchange Offer. You shall prepare a final list of all persons whose tenders were
accepted,  the aggregate  principal  amount of Private  Notes  tendered,  the
aggregate principal  amount of Private  Notes  accepted and the identity of any
Participating Broker-Dealers and the aggregate principal  amount of Exchange
Notes delivered to each, and deliver said list to the Company.

         17. Letters of Transmittal, book-entry confirmations and Notices of
Guaranteed Delivery received by you shall be preserved by you for a period of
time at least equal to the period of time you preserve other records pertaining
to the transfer of securities, or one year, whichever is longer, and thereafter
shall be delivered by you to the Company. You shall dispose of unused Letters of
Transmittal and other surplus materials as instructed by the Company.

         18. You hereby expressly waive any lien, encumbrance or right of
set-off whatsoever that you may have with respect to funds deposited with you
for the payment of transfer taxes by reasons of amounts, if any, borrowed by the
Company, or any of its subsidiaries or affiliates pursuant to any loan or credit
agreement with you or for compensation owed to you hereunder.

         19. For services rendered as Exchange Agent hereunder, you shall be
entitled to such compensation as set forth on Schedule I attached hereto.

         20. You hereby acknowledge receipt of the Prospectus and the Letter of
Transmittal and further acknowledge that you have examined each of them. Any
inconsistency between this Agreement, on the one hand, and the Prospectus and
the Letter of Transmittal (as they may be amended from time to time), on the
other hand, shall be resolved in favor of the latter two documents, except with
respect to the duties, liabilities and indemnification of you as Exchange Agent,
which shall be controlled by this Agreement.

         21. The Company covenants and agrees to indemnify and hold you harmless
in your capacity as Exchange Agent hereunder against any loss, liability, cost
or expense, including attorneys' fees and expenses arising out of or in
connection with any act, omission, delay or refusal made by you in reliance upon
any signature, endorsement, assignment, certificate, order, request, notice,
instruction or other instrument or document reasonably believed by you to be
valid, genuine and sufficient and in accepting any tender or effecting any
transfer of Private Notes reasonably believed by you in good faith to be
authorized, and in delaying or refusing in good faith to accept any tenders or
effect any transfer of Private Notes; provided, however, that anything in this
Agreement to the contrary notwithstanding, the Company shall not be liable for
indemnification or otherwise for any loss, liability, cost or expense to the
extent arising out of your gross negligence or willful misconduct. In no case
shall the Company be liable under this indemnity with respect to any claim
against you unless the Company shall be notified by you, by letter or cable or
by facsimile which is confirmed by letter, of the written assertion of a claim

                                       6
<PAGE>   7


against you or of any other action commenced against you, promptly after you
shall have received any such written assertion or notice of commencement of
action. The Company shall be entitled to participate, at its own expense, in the
defense of any such claim or other action, and, if the Company so elects, the
Company may assume the defense of any pending or threatened action against you
in respect of which indemnification may be sought hereunder, in which case the
Company shall not thereafter be responsible for the subsequently-incurred fees
and disbursements of legal counsel for you under this paragraph so long as the
Company shall retain counsel reasonably satisfactory to you to defend such suit;
provided, that the Company shall not be entitled to assume the defense of any
such action if the named parties to such action include both you and the Company
and representation of both parties by the same legal counsel would, in the
written opinion of your counsel, be inappropriate due to actual or potential
conflicting interests between you and the Company. You understand and agree that
the Company shall not be liable under this paragraph for the fees and expenses
of more than one legal counsel for you.

         22. You shall arrange to comply with all requirements under the tax
laws of the United States, including those relating to missing Tax
Identification Numbers, and shall file any appropriate reports with the Internal
Revenue Service. The Company understands that you are required, in certain
instances, to deduct thirty-one percent (31%) with respect to interest paid on
the Exchange Notes and proceeds from the sale, exchange, redemption or
retirement of the Exchange Notes from holders who have not supplied their
correct Taxpayer Identification Number or required certification. Such funds
will be turned over to the Internal Revenue Service in accordance with
applicable regulations.

         23. You shall notify the Company of the amount of any transfer taxes
payable in respect of the exchange of Private Notes and, upon receipt of a
written approval from the Company, shall deliver or cause to be delivered, in a
timely manner to each governmental authority to which any transfer taxes are
payable in respect of the exchange of Private Notes, your check in the amount of
all transfer taxes so payable, and the Company shall reimburse you for the
amount of any and all transfer taxes payable in respect of the exchange of
Private Notes; provided, however, that you shall reimburse the Company for
amounts refunded to you in respect of your payment of any such transfer taxes,
at such time as such refund is received by you.

         24. This Agreement and your appointment as Exchange Agent hereunder
shall be construed and enforced in accordance with the laws of the State of New
York applicable to agreements made and to be performed entirely within such
state, and without regard to conflicts of law principles.

         25. This Agreement shall be binding upon and inure solely to the
benefit of each party hereto and nothing in this Agreement, express or implied,
is intended to or shall confer upon any other person any right, benefit or
remedy of any nature whatsoever under or by reason of this Agreement. Without
limitation of the foregoing, the parties hereto expressly agree that no holder
of Private Notes or Exchange Notes shall have any right, benefit or remedy of
any nature whatsoever under, or by reason of, this Agreement.

                                       7

<PAGE>   8


         26. This Agreement may be executed in two or more counterparts, each of
which shall be deemed to be an original, and all of which taken together shall
constitute one and the same agreement.

         27. In case any provision of this Agreement shall be invalid, illegal
or unenforceable, the validity, legality and enforceability of the remaining
provisions shall not in any way be affected or impaired thereby.

         28. This Agreement shall not be deemed or construed to be modified,
amended, rescinded, canceled or waived, in whole or in part, except by a written
instrument signed by a duly authorized representative of the party to be
charged.

         29. Unless otherwise provided herein, all notices, requests and other
communications to any party hereunder shall be in writing (including facsimile
or similar writing) and shall be given to such party, addressed to it, at its
address or telecopy number set forth below:

         If to the Company:

                  Digital Teleport, Inc.
                  11111 Dorsett Road
                  St. Louis, MO 63043
                  Facsimile:        (314) 253-6610
                  Attention:        Richard D. Weinstein President and
                                    Chief Executive Officer

         With a copy to:

                  Bryan Cave LLP
                  211 North Broadway, Suite 3600
                  St. Louis, Missouri 63102-2750
                  Facsimile:        (314) 259-2020
                  Attention:        J. Mark Klamer

         If to the Exchange Agent:

                  The Bank of New York
                  101 Barclay Street
                  Floor 21 West
                  New York, New York 10286
                  Facsimile:        (212) 815-5915
                  Attention:        Corporate Trust Trustee Administration

         30. Unless terminated earlier by the parties hereto, this Agreement
shall terminate 90 days following the Expiration Date. Notwithstanding the
foregoing, paragraphs 17, 19, 21 and 23 shall survive the termination of this
Agreement. Upon any termination of this Agreement, 

                                       8
<PAGE>   9

you shall promptly deliver to the Company any  certificates for Notes, funds or
property then held by you as Exchange Agent under this Agreement.

        31. This Agreement shall be binding and effective as of the date
hereof.

         Please acknowledge receipt of this Agreement and confirm the
arrangements herein provided by signing and returning the enclosed copy.

                                            DTI HOLDINGS, INC.


                                            By:___________________________
                                            Name: Richard D. Weinstein
                                            Title: President and Chief 
                                            Executive Officer

Accepted as the date first above written:

THE BANK OF NEW YORK, as
Exchange Agent



By:___________________________
Name:
Title:


                                       9

<PAGE>   10


                                   SCHEDULE I


                                FEE SCHEDULE FOR
                             EXCHANGE AGENT SERVICES


I.       ACCEPTANCE FEE                                                  Waived

         Our Acceptance Fee includes review of all relevant documentation,
         closing of transaction, setting up of records and opening accounts.

II.      ADMINISTRATIVE FEE

         Our administrative fee covers all duties of the Exchange Agent
         including distributing exchange offer documents to the Book-Entry
         Transfer Facility, receipt and examination of required exchange offer
         documentation, reporting to company, calculation of and delivery to
         participants and the Book-Entry Transfer for Facility. Fees shall be
         billed upon closing.

III.     OUT-OF-POCKET EXPENSES

         All out-of-pocket expenses including but not limited to postage,
         express mail, telecopier, long distance telephone, wire transfer
         charges, courier expenses, or other expense incurred by the Bank during
         its acceptance and administration shall be billed at cost as incurred.

IV.      EXTRAORDINARY SERVICES

         Charges for the performance of any service not of a routine
         administrative nature or not contemplated at closing and specifically
         covered elsewhere in this schedule of fees will be determined by
         ___________________.
                                       10


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